v4.19.13 snapshot.
diff --git a/drivers/net/arcnet/Kconfig b/drivers/net/arcnet/Kconfig
new file mode 100644
index 0000000..39bd16f
--- /dev/null
+++ b/drivers/net/arcnet/Kconfig
@@ -0,0 +1,133 @@
+#
+# Arcnet configuration
+#
+
+menuconfig ARCNET
+ depends on NETDEVICES && (ISA || PCI || PCMCIA)
+ tristate "ARCnet support"
+ ---help---
+ If you have a network card of this type, say Y and check out the
+ (arguably) beautiful poetry in
+ <file:Documentation/networking/arcnet.txt>.
+
+ You need both this driver, and the driver for the particular ARCnet
+ chipset of your card. If you don't know, then it's probably a
+ COM90xx type card, so say Y (or M) to "ARCnet COM90xx chipset
+ support" below.
+
+ To compile this driver as a module, choose M here. The module will
+ be called arcnet.
+
+if ARCNET
+
+config ARCNET_1201
+ tristate "Enable standard ARCNet packet format (RFC 1201)"
+ help
+ This allows you to use RFC1201 with your ARCnet card via the virtual
+ arc0 device. You need to say Y here to communicate with
+ industry-standard RFC1201 implementations, like the arcether.com
+ packet driver or most DOS/Windows ODI drivers. Please read the
+ ARCnet documentation in <file:Documentation/networking/arcnet.txt>
+ for more information about using arc0.
+
+config ARCNET_1051
+ tristate "Enable old ARCNet packet format (RFC 1051)"
+ ---help---
+ This allows you to use RFC1051 with your ARCnet card via the virtual
+ arc0s device. You only need arc0s if you want to talk to ARCnet
+ software complying with the "old" standard, specifically, the DOS
+ arcnet.com packet driver, Amigas running AmiTCP, and some variants
+ of NetBSD. You do not need to say Y here to communicate with
+ industry-standard RFC1201 implementations, like the arcether.com
+ packet driver or most DOS/Windows ODI drivers. RFC1201 is included
+ automatically as the arc0 device. Please read the ARCnet
+ documentation in <file:Documentation/networking/arcnet.txt> for more
+ information about using arc0e and arc0s.
+
+config ARCNET_RAW
+ tristate "Enable raw mode packet interface"
+ help
+ ARCnet "raw mode" packet encapsulation, no soft headers. Unlikely
+ to work unless talking to a copy of the same Linux arcnet driver,
+ but perhaps marginally faster in that case.
+
+config ARCNET_CAP
+ tristate "Enable CAP mode packet interface"
+ help
+ ARCnet "cap mode" packet encapsulation. Used to get the hardware
+ acknowledge back to userspace. After the initial protocol byte every
+ packet is stuffed with an extra 4 byte "cookie" which doesn't
+ actually appear on the network. After transmit the driver will send
+ back a packet with protocol byte 0 containing the status of the
+ transmission:
+ 0=no hardware acknowledge
+ 1=excessive nak
+ 2=transmission accepted by the receiver hardware
+
+ Received packets are also stuffed with the extra 4 bytes but it will
+ be random data.
+
+ Cap only listens to protocol 1-8.
+
+config ARCNET_COM90xx
+ tristate "ARCnet COM90xx (normal) chipset driver"
+ help
+ This is the chipset driver for the standard COM90xx cards. If you
+ have always used the old ARCnet driver without knowing what type of
+ card you had, this is probably the one for you.
+
+ To compile this driver as a module, choose M here. The module will
+ be called com90xx.
+
+config ARCNET_COM90xxIO
+ tristate "ARCnet COM90xx (IO mapped) chipset driver"
+ ---help---
+ This is the chipset driver for the COM90xx cards, using them in
+ IO-mapped mode instead of memory-mapped mode. This is slower than
+ the normal driver. Only use it if your card doesn't support shared
+ memory.
+
+ To compile this driver as a module, choose M here. The module will
+ be called com90io.
+
+config ARCNET_RIM_I
+ tristate "ARCnet COM90xx (RIM I) chipset driver"
+ ---help---
+ This is yet another chipset driver for the COM90xx cards, but this
+ time only using memory-mapped mode, and no IO ports at all. This
+ driver is completely untested, so if you have one of these cards,
+ please mail <dwmw2@infradead.org>, especially if it works!
+
+ To compile this driver as a module, choose M here. The module will
+ be called arc-rimi.
+
+config ARCNET_COM20020
+ tristate "ARCnet COM20020 chipset driver"
+ depends on LEDS_CLASS
+ help
+ This is the driver for the new COM20020 chipset. It supports such
+ things as promiscuous mode, so packet sniffing is possible, and
+ extra diagnostic information.
+
+ To compile this driver as a module, choose M here. The module will
+ be called com20020.
+
+config ARCNET_COM20020_ISA
+ tristate "Support for COM20020 on ISA"
+ depends on ARCNET_COM20020 && ISA
+
+config ARCNET_COM20020_PCI
+ tristate "Support for COM20020 on PCI"
+ depends on ARCNET_COM20020 && PCI
+
+config ARCNET_COM20020_CS
+ tristate "COM20020 ARCnet PCMCIA support"
+ depends on ARCNET_COM20020 && PCMCIA
+ help
+ Say Y here if you intend to attach this type of ARCnet PCMCIA card
+ to your computer.
+
+ To compile this driver as a module, choose M here: the module will be
+ called com20020_cs. If unsure, say N.
+
+endif # ARCNET
diff --git a/drivers/net/arcnet/Makefile b/drivers/net/arcnet/Makefile
new file mode 100644
index 0000000..53525e8
--- /dev/null
+++ b/drivers/net/arcnet/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for linux/drivers/net/arcnet
+#
+
+obj-$(CONFIG_ARCNET) += arcnet.o
+obj-$(CONFIG_ARCNET_1201) += rfc1201.o
+obj-$(CONFIG_ARCNET_1051) += rfc1051.o
+obj-$(CONFIG_ARCNET_RAW) += arc-rawmode.o
+obj-$(CONFIG_ARCNET_CAP) += capmode.o
+obj-$(CONFIG_ARCNET_COM90xx) += com90xx.o
+obj-$(CONFIG_ARCNET_COM90xxIO) += com90io.o
+obj-$(CONFIG_ARCNET_RIM_I) += arc-rimi.o
+obj-$(CONFIG_ARCNET_COM20020) += com20020.o
+obj-$(CONFIG_ARCNET_COM20020_ISA) += com20020-isa.o
+obj-$(CONFIG_ARCNET_COM20020_PCI) += com20020-pci.o
+obj-$(CONFIG_ARCNET_COM20020_CS) += com20020_cs.o
diff --git a/drivers/net/arcnet/arc-rawmode.c b/drivers/net/arcnet/arc-rawmode.c
new file mode 100644
index 0000000..8c651fd
--- /dev/null
+++ b/drivers/net/arcnet/arc-rawmode.c
@@ -0,0 +1,189 @@
+/*
+ * Linux ARCnet driver - "raw mode" packet encapsulation (no soft headers)
+ *
+ * Written 1994-1999 by Avery Pennarun.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include "arcdevice.h"
+
+/* packet receiver */
+static void rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sk_buff *skb;
+ struct archdr *pkt = pkthdr;
+ int ofs;
+
+ arc_printk(D_DURING, dev, "it's a raw packet (length=%d)\n", length);
+
+ if (length > MTU)
+ ofs = 512 - length;
+ else
+ ofs = 256 - length;
+
+ skb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb_put(skb, length + ARC_HDR_SIZE);
+ skb->dev = dev;
+
+ pkt = (struct archdr *)skb->data;
+
+ skb_reset_mac_header(skb);
+ skb_pull(skb, ARC_HDR_SIZE);
+
+ /* up to sizeof(pkt->soft) has already been copied from the card */
+ memcpy(pkt, pkthdr, sizeof(struct archdr));
+ if (length > sizeof(pkt->soft))
+ lp->hw.copy_from_card(dev, bufnum, ofs + sizeof(pkt->soft),
+ pkt->soft.raw + sizeof(pkt->soft),
+ length - sizeof(pkt->soft));
+
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "rx");
+
+ skb->protocol = cpu_to_be16(ETH_P_ARCNET);
+ netif_rx(skb);
+}
+
+/* Create the ARCnet hard/soft headers for raw mode.
+ * There aren't any soft headers in raw mode - not even the protocol id.
+ */
+static int build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr)
+{
+ int hdr_size = ARC_HDR_SIZE;
+ struct archdr *pkt = skb_push(skb, hdr_size);
+
+ /* Set the source hardware address.
+ *
+ * This is pretty pointless for most purposes, but it can help in
+ * debugging. ARCnet does not allow us to change the source address
+ * in the actual packet sent.
+ */
+ pkt->hard.source = *dev->dev_addr;
+
+ /* see linux/net/ethernet/eth.c to see where I got the following */
+
+ if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
+ /* FIXME: fill in the last byte of the dest ipaddr here
+ * to better comply with RFC1051 in "noarp" mode.
+ */
+ pkt->hard.dest = 0;
+ return hdr_size;
+ }
+ /* otherwise, just fill it in and go! */
+ pkt->hard.dest = daddr;
+
+ return hdr_size; /* success */
+}
+
+static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
+ int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct arc_hardware *hard = &pkt->hard;
+ int ofs;
+
+ arc_printk(D_DURING, dev, "prepare_tx: txbufs=%d/%d/%d\n",
+ lp->next_tx, lp->cur_tx, bufnum);
+
+ /* hard header is not included in packet length */
+ length -= ARC_HDR_SIZE;
+
+ if (length > XMTU) {
+ /* should never happen! other people already check for this. */
+ arc_printk(D_NORMAL, dev, "Bug! prepare_tx with size %d (> %d)\n",
+ length, XMTU);
+ length = XMTU;
+ }
+ if (length >= MinTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - length;
+ } else if (length > MTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - length - 3;
+ } else {
+ hard->offset[0] = ofs = 256 - length;
+ }
+
+ arc_printk(D_DURING, dev, "prepare_tx: length=%d ofs=%d\n",
+ length, ofs);
+
+ lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
+ lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft, length);
+
+ lp->lastload_dest = hard->dest;
+
+ return 1; /* done */
+}
+
+static struct ArcProto rawmode_proto = {
+ .suffix = 'r',
+ .mtu = XMTU,
+ .rx = rx,
+ .build_header = build_header,
+ .prepare_tx = prepare_tx,
+ .continue_tx = NULL,
+ .ack_tx = NULL
+};
+
+static int __init arcnet_raw_init(void)
+{
+ int count;
+
+ pr_info("raw mode (`r') encapsulation support loaded\n");
+
+ for (count = 0; count < 256; count++)
+ if (arc_proto_map[count] == arc_proto_default)
+ arc_proto_map[count] = &rawmode_proto;
+
+ /* for raw mode, we only set the bcast proto if there's no better one */
+ if (arc_bcast_proto == arc_proto_default)
+ arc_bcast_proto = &rawmode_proto;
+
+ arc_proto_default = &rawmode_proto;
+ return 0;
+}
+
+static void __exit arcnet_raw_exit(void)
+{
+ arcnet_unregister_proto(&rawmode_proto);
+}
+
+module_init(arcnet_raw_init);
+module_exit(arcnet_raw_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/arcnet/arc-rimi.c b/drivers/net/arcnet/arc-rimi.c
new file mode 100644
index 0000000..a07e249
--- /dev/null
+++ b/drivers/net/arcnet/arc-rimi.c
@@ -0,0 +1,381 @@
+/*
+ * Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards
+ *
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/bootmem.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include "arcdevice.h"
+#include "com9026.h"
+
+/* Internal function declarations */
+
+static int arcrimi_probe(struct net_device *dev);
+static int arcrimi_found(struct net_device *dev);
+static void arcrimi_command(struct net_device *dev, int command);
+static int arcrimi_status(struct net_device *dev);
+static void arcrimi_setmask(struct net_device *dev, int mask);
+static int arcrimi_reset(struct net_device *dev, int really_reset);
+static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
+ void *buf, int count);
+static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+
+/* Handy defines for ARCnet specific stuff */
+
+/* Amount of I/O memory used by the card */
+#define BUFFER_SIZE (512)
+#define MIRROR_SIZE (BUFFER_SIZE * 4)
+
+/* We cannot probe for a RIM I card; one reason is I don't know how to reset
+ * them. In fact, we can't even get their node ID automatically. So, we
+ * need to be passed a specific shmem address, IRQ, and node ID.
+ */
+static int __init arcrimi_probe(struct net_device *dev)
+{
+ if (BUGLVL(D_NORMAL)) {
+ pr_info("%s\n", "RIM I (entirely mem-mapped) support");
+ pr_info("E-mail me if you actually test the RIM I driver, please!\n");
+ pr_info("Given: node %02Xh, shmem %lXh, irq %d\n",
+ dev->dev_addr[0], dev->mem_start, dev->irq);
+ }
+
+ if (dev->mem_start <= 0 || dev->irq <= 0) {
+ if (BUGLVL(D_NORMAL))
+ pr_err("No autoprobe for RIM I; you must specify the shmem and irq!\n");
+ return -ENODEV;
+ }
+ if (dev->dev_addr[0] == 0) {
+ if (BUGLVL(D_NORMAL))
+ pr_err("You need to specify your card's station ID!\n");
+ return -ENODEV;
+ }
+ /* Grab the memory region at mem_start for MIRROR_SIZE bytes.
+ * Later in arcrimi_found() the real size will be determined
+ * and this reserve will be released and the correct size
+ * will be taken.
+ */
+ if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
+ if (BUGLVL(D_NORMAL))
+ pr_notice("Card memory already allocated\n");
+ return -ENODEV;
+ }
+ return arcrimi_found(dev);
+}
+
+static int check_mirror(unsigned long addr, size_t size)
+{
+ void __iomem *p;
+ int res = -1;
+
+ if (!request_mem_region(addr, size, "arcnet (90xx)"))
+ return -1;
+
+ p = ioremap(addr, size);
+ if (p) {
+ if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue)
+ res = 1;
+ else
+ res = 0;
+ iounmap(p);
+ }
+
+ release_mem_region(addr, size);
+ return res;
+}
+
+/* Set up the struct net_device associated with this card.
+ * Called after probing succeeds.
+ */
+static int __init arcrimi_found(struct net_device *dev)
+{
+ struct arcnet_local *lp;
+ unsigned long first_mirror, last_mirror, shmem;
+ void __iomem *p;
+ int mirror_size;
+ int err;
+
+ p = ioremap(dev->mem_start, MIRROR_SIZE);
+ if (!p) {
+ release_mem_region(dev->mem_start, MIRROR_SIZE);
+ arc_printk(D_NORMAL, dev, "Can't ioremap\n");
+ return -ENODEV;
+ }
+
+ /* reserve the irq */
+ if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
+ iounmap(p);
+ release_mem_region(dev->mem_start, MIRROR_SIZE);
+ arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
+ return -ENODEV;
+ }
+
+ shmem = dev->mem_start;
+ arcnet_writeb(TESTvalue, p, COM9026_REG_W_INTMASK);
+ arcnet_writeb(TESTvalue, p, COM9026_REG_W_COMMAND);
+ /* actually the station/node ID */
+
+ /* find the real shared memory start/end points, including mirrors */
+
+ /* guess the actual size of one "memory mirror" - the number of
+ * bytes between copies of the shared memory. On most cards, it's
+ * 2k (or there are no mirrors at all) but on some, it's 4k.
+ */
+ mirror_size = MIRROR_SIZE;
+ if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue &&
+ check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
+ check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
+ mirror_size = 2 * MIRROR_SIZE;
+
+ first_mirror = shmem - mirror_size;
+ while (check_mirror(first_mirror, mirror_size) == 1)
+ first_mirror -= mirror_size;
+ first_mirror += mirror_size;
+
+ last_mirror = shmem + mirror_size;
+ while (check_mirror(last_mirror, mirror_size) == 1)
+ last_mirror += mirror_size;
+ last_mirror -= mirror_size;
+
+ dev->mem_start = first_mirror;
+ dev->mem_end = last_mirror + MIRROR_SIZE - 1;
+
+ /* initialize the rest of the device structure. */
+
+ lp = netdev_priv(dev);
+ lp->card_name = "RIM I";
+ lp->hw.command = arcrimi_command;
+ lp->hw.status = arcrimi_status;
+ lp->hw.intmask = arcrimi_setmask;
+ lp->hw.reset = arcrimi_reset;
+ lp->hw.owner = THIS_MODULE;
+ lp->hw.copy_to_card = arcrimi_copy_to_card;
+ lp->hw.copy_from_card = arcrimi_copy_from_card;
+
+ /* re-reserve the memory region - arcrimi_probe() alloced this reqion
+ * but didn't know the real size. Free that region and then re-get
+ * with the correct size. There is a VERY slim chance this could
+ * fail.
+ */
+ iounmap(p);
+ release_mem_region(shmem, MIRROR_SIZE);
+ if (!request_mem_region(dev->mem_start,
+ dev->mem_end - dev->mem_start + 1,
+ "arcnet (90xx)")) {
+ arc_printk(D_NORMAL, dev, "Card memory already allocated\n");
+ goto err_free_irq;
+ }
+
+ lp->mem_start = ioremap(dev->mem_start,
+ dev->mem_end - dev->mem_start + 1);
+ if (!lp->mem_start) {
+ arc_printk(D_NORMAL, dev, "Can't remap device memory!\n");
+ goto err_release_mem;
+ }
+
+ /* get and check the station ID from offset 1 in shmem */
+ dev->dev_addr[0] = arcnet_readb(lp->mem_start, COM9026_REG_R_STATION);
+
+ arc_printk(D_NORMAL, dev, "ARCnet RIM I: station %02Xh found at IRQ %d, ShMem %lXh (%ld*%d bytes)\n",
+ dev->dev_addr[0],
+ dev->irq, dev->mem_start,
+ (dev->mem_end - dev->mem_start + 1) / mirror_size,
+ mirror_size);
+
+ err = register_netdev(dev);
+ if (err)
+ goto err_unmap;
+
+ return 0;
+
+err_unmap:
+ iounmap(lp->mem_start);
+err_release_mem:
+ release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
+err_free_irq:
+ free_irq(dev->irq, dev);
+ return -EIO;
+}
+
+/* Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int arcrimi_reset(struct net_device *dev, int really_reset)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *ioaddr = lp->mem_start + 0x800;
+
+ arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
+ dev->name, arcnet_readb(ioaddr, COM9026_REG_R_STATUS));
+
+ if (really_reset) {
+ arcnet_writeb(TESTvalue, ioaddr, -0x800); /* fake reset */
+ return 0;
+ }
+ /* clear flags & end reset */
+ arcnet_writeb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
+ arcnet_writeb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
+
+ /* enable extended (512-byte) packets */
+ arcnet_writeb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
+
+ /* done! return success. */
+ return 0;
+}
+
+static void arcrimi_setmask(struct net_device *dev, int mask)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *ioaddr = lp->mem_start + 0x800;
+
+ arcnet_writeb(mask, ioaddr, COM9026_REG_W_INTMASK);
+}
+
+static int arcrimi_status(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *ioaddr = lp->mem_start + 0x800;
+
+ return arcnet_readb(ioaddr, COM9026_REG_R_STATUS);
+}
+
+static void arcrimi_command(struct net_device *dev, int cmd)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *ioaddr = lp->mem_start + 0x800;
+
+ arcnet_writeb(cmd, ioaddr, COM9026_REG_W_COMMAND);
+}
+
+static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset,
+ void *buf, int count)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
+
+ TIME(dev, "memcpy_toio", count, memcpy_toio(memaddr, buf, count));
+}
+
+static void arcrimi_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset;
+
+ TIME(dev, "memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
+}
+
+static int node;
+static int io; /* use the insmod io= irq= node= options */
+static int irq;
+static char device[9]; /* use eg. device=arc1 to change name */
+
+module_param(node, int, 0);
+module_param(io, int, 0);
+module_param(irq, int, 0);
+module_param_string(device, device, sizeof(device), 0);
+MODULE_LICENSE("GPL");
+
+static struct net_device *my_dev;
+
+static int __init arc_rimi_init(void)
+{
+ struct net_device *dev;
+
+ dev = alloc_arcdev(device);
+ if (!dev)
+ return -ENOMEM;
+
+ if (node && node != 0xff)
+ dev->dev_addr[0] = node;
+
+ dev->mem_start = io;
+ dev->irq = irq;
+ if (dev->irq == 2)
+ dev->irq = 9;
+
+ if (arcrimi_probe(dev)) {
+ free_netdev(dev);
+ return -EIO;
+ }
+
+ my_dev = dev;
+ return 0;
+}
+
+static void __exit arc_rimi_exit(void)
+{
+ struct net_device *dev = my_dev;
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ unregister_netdev(dev);
+ iounmap(lp->mem_start);
+ release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
+ free_irq(dev->irq, dev);
+ free_netdev(dev);
+}
+
+#ifndef MODULE
+static int __init arcrimi_setup(char *s)
+{
+ int ints[8];
+
+ s = get_options(s, 8, ints);
+ if (!ints[0])
+ return 1;
+ switch (ints[0]) {
+ default: /* ERROR */
+ pr_err("Too many arguments\n");
+ case 3: /* Node ID */
+ node = ints[3];
+ case 2: /* IRQ */
+ irq = ints[2];
+ case 1: /* IO address */
+ io = ints[1];
+ }
+ if (*s)
+ snprintf(device, sizeof(device), "%s", s);
+ return 1;
+}
+__setup("arcrimi=", arcrimi_setup);
+#endif /* MODULE */
+
+module_init(arc_rimi_init)
+module_exit(arc_rimi_exit)
diff --git a/drivers/net/arcnet/arcdevice.h b/drivers/net/arcnet/arcdevice.h
new file mode 100644
index 0000000..d09b2b4
--- /dev/null
+++ b/drivers/net/arcnet/arcdevice.h
@@ -0,0 +1,393 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. NET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Definitions used by the ARCnet driver.
+ *
+ * Authors: Avery Pennarun and David Woodhouse
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+#ifndef _LINUX_ARCDEVICE_H
+#define _LINUX_ARCDEVICE_H
+
+#include <asm/timex.h>
+#include <linux/if_arcnet.h>
+
+#ifdef __KERNEL__
+#include <linux/interrupt.h>
+
+/*
+ * RECON_THRESHOLD is the maximum number of RECON messages to receive
+ * within one minute before printing a "cabling problem" warning. The
+ * default value should be fine.
+ *
+ * After that, a "cabling restored" message will be printed on the next IRQ
+ * if no RECON messages have been received for 10 seconds.
+ *
+ * Do not define RECON_THRESHOLD at all if you want to disable this feature.
+ */
+#define RECON_THRESHOLD 30
+
+/*
+ * Define this to the minimum "timeout" value. If a transmit takes longer
+ * than TX_TIMEOUT jiffies, Linux will abort the TX and retry. On a large
+ * network, or one with heavy network traffic, this timeout may need to be
+ * increased. The larger it is, though, the longer it will be between
+ * necessary transmits - don't set this too high.
+ */
+#define TX_TIMEOUT (HZ * 200 / 1000)
+
+/* Display warnings about the driver being an ALPHA version. */
+#undef ALPHA_WARNING
+
+/*
+ * Debugging bitflags: each option can be enabled individually.
+ *
+ * Note: only debug flags included in the ARCNET_DEBUG_MAX define will
+ * actually be available. GCC will (at least, GCC 2.7.0 will) notice
+ * lines using a BUGLVL not in ARCNET_DEBUG_MAX and automatically optimize
+ * them out.
+ */
+#define D_NORMAL 1 /* important operational info */
+#define D_EXTRA 2 /* useful, but non-vital information */
+#define D_INIT 4 /* show init/probe messages */
+#define D_INIT_REASONS 8 /* show reasons for discarding probes */
+#define D_RECON 32 /* print a message whenever token is lost */
+#define D_PROTO 64 /* debug auto-protocol support */
+/* debug levels below give LOTS of output during normal operation! */
+#define D_DURING 128 /* trace operations (including irq's) */
+#define D_TX 256 /* show tx packets */
+#define D_RX 512 /* show rx packets */
+#define D_SKB 1024 /* show skb's */
+#define D_SKB_SIZE 2048 /* show skb sizes */
+#define D_TIMING 4096 /* show time needed to copy buffers to card */
+#define D_DEBUG 8192 /* Very detailed debug line for line */
+
+#ifndef ARCNET_DEBUG_MAX
+#define ARCNET_DEBUG_MAX (127) /* change to ~0 if you want detailed debugging */
+#endif
+
+#ifndef ARCNET_DEBUG
+#define ARCNET_DEBUG (D_NORMAL | D_EXTRA)
+#endif
+extern int arcnet_debug;
+
+#define BUGLVL(x) ((x) & ARCNET_DEBUG_MAX & arcnet_debug)
+
+/* macros to simplify debug checking */
+#define arc_printk(x, dev, fmt, ...) \
+do { \
+ if (BUGLVL(x)) { \
+ if ((x) == D_NORMAL) \
+ netdev_warn(dev, fmt, ##__VA_ARGS__); \
+ else if ((x) < D_DURING) \
+ netdev_info(dev, fmt, ##__VA_ARGS__); \
+ else \
+ netdev_dbg(dev, fmt, ##__VA_ARGS__); \
+ } \
+} while (0)
+
+#define arc_cont(x, fmt, ...) \
+do { \
+ if (BUGLVL(x)) \
+ pr_cont(fmt, ##__VA_ARGS__); \
+} while (0)
+
+/* see how long a function call takes to run, expressed in CPU cycles */
+#define TIME(dev, name, bytes, call) \
+do { \
+ if (BUGLVL(D_TIMING)) { \
+ unsigned long _x, _y; \
+ _x = get_cycles(); \
+ call; \
+ _y = get_cycles(); \
+ arc_printk(D_TIMING, dev, \
+ "%s: %d bytes in %lu cycles == %lu Kbytes/100Mcycle\n", \
+ name, bytes, _y - _x, \
+ 100000000 / 1024 * bytes / (_y - _x + 1)); \
+ } else { \
+ call; \
+ } \
+} while (0)
+
+/*
+ * Time needed to reset the card - in ms (milliseconds). This works on my
+ * SMC PC100. I can't find a reference that tells me just how long I
+ * should wait.
+ */
+#define RESETtime (300)
+
+/*
+ * These are the max/min lengths of packet payload, not including the
+ * arc_hardware header, but definitely including the soft header.
+ *
+ * Note: packet sizes 254, 255, 256 are impossible because of the way
+ * ARCnet registers work That's why RFC1201 defines "exception" packets.
+ * In non-RFC1201 protocols, we have to just tack some extra bytes on the
+ * end.
+ */
+#define MTU 253 /* normal packet max size */
+#define MinTU 257 /* extended packet min size */
+#define XMTU 508 /* extended packet max size */
+
+/* status/interrupt mask bit fields */
+#define TXFREEflag 0x01 /* transmitter available */
+#define TXACKflag 0x02 /* transmitted msg. ackd */
+#define RECONflag 0x04 /* network reconfigured */
+#define TESTflag 0x08 /* test flag */
+#define EXCNAKflag 0x08 /* excesive nak flag */
+#define RESETflag 0x10 /* power-on-reset */
+#define RES1flag 0x20 /* reserved - usually set by jumper */
+#define RES2flag 0x40 /* reserved - usually set by jumper */
+#define NORXflag 0x80 /* receiver inhibited */
+
+/* Flags used for IO-mapped memory operations */
+#define AUTOINCflag 0x40 /* Increase location with each access */
+#define IOMAPflag 0x02 /* (for 90xx) Use IO mapped memory, not mmap */
+#define ENABLE16flag 0x80 /* (for 90xx) Enable 16-bit mode */
+
+/* in the command register, the following bits have these meanings:
+ * 0-2 command
+ * 3-4 page number (for enable rcv/xmt command)
+ * 7 receive broadcasts
+ */
+#define NOTXcmd 0x01 /* disable transmitter */
+#define NORXcmd 0x02 /* disable receiver */
+#define TXcmd 0x03 /* enable transmitter */
+#define RXcmd 0x04 /* enable receiver */
+#define CONFIGcmd 0x05 /* define configuration */
+#define CFLAGScmd 0x06 /* clear flags */
+#define TESTcmd 0x07 /* load test flags */
+#define STARTIOcmd 0x18 /* start internal operation */
+
+/* flags for "clear flags" command */
+#define RESETclear 0x08 /* power-on-reset */
+#define CONFIGclear 0x10 /* system reconfigured */
+
+#define EXCNAKclear 0x0E /* Clear and acknowledge the excive nak bit */
+
+/* flags for "load test flags" command */
+#define TESTload 0x08 /* test flag (diagnostic) */
+
+/* byte deposited into first address of buffers on reset */
+#define TESTvalue 0321 /* that's octal for 0xD1 :) */
+
+/* for "enable receiver" command */
+#define RXbcasts 0x80 /* receive broadcasts */
+
+/* flags for "define configuration" command */
+#define NORMALconf 0x00 /* 1-249 byte packets */
+#define EXTconf 0x08 /* 250-504 byte packets */
+
+/* card feature flags, set during auto-detection.
+ * (currently only used by com20020pci)
+ */
+#define ARC_IS_5MBIT 1 /* card default speed is 5MBit */
+#define ARC_CAN_10MBIT 2 /* card uses COM20022, supporting 10MBit,
+ but default is 2.5MBit. */
+
+/* information needed to define an encapsulation driver */
+struct ArcProto {
+ char suffix; /* a for RFC1201, e for ether-encap, etc. */
+ int mtu; /* largest possible packet */
+ int is_ip; /* This is a ip plugin - not a raw thing */
+
+ void (*rx)(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length);
+ int (*build_header)(struct sk_buff *skb, struct net_device *dev,
+ unsigned short ethproto, uint8_t daddr);
+
+ /* these functions return '1' if the skb can now be freed */
+ int (*prepare_tx)(struct net_device *dev, struct archdr *pkt,
+ int length, int bufnum);
+ int (*continue_tx)(struct net_device *dev, int bufnum);
+ int (*ack_tx)(struct net_device *dev, int acked);
+};
+
+extern struct ArcProto *arc_proto_map[256], *arc_proto_default,
+ *arc_bcast_proto, *arc_raw_proto;
+
+/*
+ * "Incoming" is information needed for each address that could be sending
+ * to us. Mostly for partially-received split packets.
+ */
+struct Incoming {
+ struct sk_buff *skb; /* packet data buffer */
+ __be16 sequence; /* sequence number of assembly */
+ uint8_t lastpacket, /* number of last packet (from 1) */
+ numpackets; /* number of packets in split */
+};
+
+/* only needed for RFC1201 */
+struct Outgoing {
+ struct ArcProto *proto; /* protocol driver that owns this:
+ * if NULL, no packet is pending.
+ */
+ struct sk_buff *skb; /* buffer from upper levels */
+ struct archdr *pkt; /* a pointer into the skb */
+ uint16_t length, /* bytes total */
+ dataleft, /* bytes left */
+ segnum, /* segment being sent */
+ numsegs; /* number of segments */
+};
+
+#define ARCNET_LED_NAME_SZ (IFNAMSIZ + 6)
+
+struct arcnet_local {
+ uint8_t config, /* current value of CONFIG register */
+ timeout, /* Extended timeout for COM20020 */
+ backplane, /* Backplane flag for COM20020 */
+ clockp, /* COM20020 clock divider */
+ clockm, /* COM20020 clock multiplier flag */
+ setup, /* Contents of setup1 register */
+ setup2, /* Contents of setup2 register */
+ intmask; /* current value of INTMASK register */
+ uint8_t default_proto[256]; /* default encap to use for each host */
+ int cur_tx, /* buffer used by current transmit, or -1 */
+ next_tx, /* buffer where a packet is ready to send */
+ cur_rx; /* current receive buffer */
+ int lastload_dest, /* can last loaded packet be acked? */
+ lasttrans_dest; /* can last TX'd packet be acked? */
+ int timed_out; /* need to process TX timeout and drop packet */
+ unsigned long last_timeout; /* time of last reported timeout */
+ char *card_name; /* card ident string */
+ int card_flags; /* special card features */
+
+ /* On preemtive and SMB a lock is needed */
+ spinlock_t lock;
+
+ struct led_trigger *tx_led_trig;
+ char tx_led_trig_name[ARCNET_LED_NAME_SZ];
+ struct led_trigger *recon_led_trig;
+ char recon_led_trig_name[ARCNET_LED_NAME_SZ];
+
+ struct timer_list timer;
+
+ struct net_device *dev;
+ int reply_status;
+ struct tasklet_struct reply_tasklet;
+
+ /*
+ * Buffer management: an ARCnet card has 4 x 512-byte buffers, each of
+ * which can be used for either sending or receiving. The new dynamic
+ * buffer management routines use a simple circular queue of available
+ * buffers, and take them as they're needed. This way, we simplify
+ * situations in which we (for example) want to pre-load a transmit
+ * buffer, or start receiving while we copy a received packet to
+ * memory.
+ *
+ * The rules: only the interrupt handler is allowed to _add_ buffers to
+ * the queue; thus, this doesn't require a lock. Both the interrupt
+ * handler and the transmit function will want to _remove_ buffers, so
+ * we need to handle the situation where they try to do it at the same
+ * time.
+ *
+ * If next_buf == first_free_buf, the queue is empty. Since there are
+ * only four possible buffers, the queue should never be full.
+ */
+ atomic_t buf_lock;
+ int buf_queue[5];
+ int next_buf, first_free_buf;
+
+ /* network "reconfiguration" handling */
+ unsigned long first_recon; /* time of "first" RECON message to count */
+ unsigned long last_recon; /* time of most recent RECON */
+ int num_recons; /* number of RECONs between first and last. */
+ int network_down; /* do we think the network is down? */
+
+ int excnak_pending; /* We just got an excesive nak interrupt */
+
+ struct {
+ uint16_t sequence; /* sequence number (incs with each packet) */
+ __be16 aborted_seq;
+
+ struct Incoming incoming[256]; /* one from each address */
+ } rfc1201;
+
+ /* really only used by rfc1201, but we'll pretend it's not */
+ struct Outgoing outgoing; /* packet currently being sent */
+
+ /* hardware-specific functions */
+ struct {
+ struct module *owner;
+ void (*command)(struct net_device *dev, int cmd);
+ int (*status)(struct net_device *dev);
+ void (*intmask)(struct net_device *dev, int mask);
+ int (*reset)(struct net_device *dev, int really_reset);
+ void (*open)(struct net_device *dev);
+ void (*close)(struct net_device *dev);
+ void (*datatrigger) (struct net_device * dev, int enable);
+ void (*recontrigger) (struct net_device * dev, int enable);
+
+ void (*copy_to_card)(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+ void (*copy_from_card)(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+ } hw;
+
+ void __iomem *mem_start; /* pointer to ioremap'ed MMIO */
+};
+
+enum arcnet_led_event {
+ ARCNET_LED_EVENT_RECON,
+ ARCNET_LED_EVENT_OPEN,
+ ARCNET_LED_EVENT_STOP,
+ ARCNET_LED_EVENT_TX,
+};
+
+void arcnet_led_event(struct net_device *netdev, enum arcnet_led_event event);
+void devm_arcnet_led_init(struct net_device *netdev, int index, int subid);
+
+#if ARCNET_DEBUG_MAX & D_SKB
+void arcnet_dump_skb(struct net_device *dev, struct sk_buff *skb, char *desc);
+#else
+static inline
+void arcnet_dump_skb(struct net_device *dev, struct sk_buff *skb, char *desc)
+{
+}
+#endif
+
+void arcnet_unregister_proto(struct ArcProto *proto);
+irqreturn_t arcnet_interrupt(int irq, void *dev_id);
+struct net_device *alloc_arcdev(const char *name);
+
+int arcnet_open(struct net_device *dev);
+int arcnet_close(struct net_device *dev);
+netdev_tx_t arcnet_send_packet(struct sk_buff *skb,
+ struct net_device *dev);
+void arcnet_timeout(struct net_device *dev);
+
+/* I/O equivalents */
+
+#ifdef CONFIG_SA1100_CT6001
+#define BUS_ALIGN 2 /* 8 bit device on a 16 bit bus - needs padding */
+#else
+#define BUS_ALIGN 1
+#endif
+
+/* addr and offset allow register like names to define the actual IO address.
+ * A configuration option multiplies the offset for alignment.
+ */
+#define arcnet_inb(addr, offset) \
+ inb((addr) + BUS_ALIGN * (offset))
+#define arcnet_outb(value, addr, offset) \
+ outb(value, (addr) + BUS_ALIGN * (offset))
+
+#define arcnet_insb(addr, offset, buffer, count) \
+ insb((addr) + BUS_ALIGN * (offset), buffer, count)
+#define arcnet_outsb(addr, offset, buffer, count) \
+ outsb((addr) + BUS_ALIGN * (offset), buffer, count)
+
+#define arcnet_readb(addr, offset) \
+ readb((addr) + (offset))
+#define arcnet_writeb(value, addr, offset) \
+ writeb(value, (addr) + (offset))
+
+#endif /* __KERNEL__ */
+#endif /* _LINUX_ARCDEVICE_H */
diff --git a/drivers/net/arcnet/arcnet.c b/drivers/net/arcnet/arcnet.c
new file mode 100644
index 0000000..8459115
--- /dev/null
+++ b/drivers/net/arcnet/arcnet.c
@@ -0,0 +1,1159 @@
+/*
+ * Linux ARCnet driver - device-independent routines
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * The change log is now in a file called ChangeLog in this directory.
+ *
+ * Sources:
+ * - Crynwr arcnet.com/arcether.com packet drivers.
+ * - arcnet.c v0.00 dated 1/1/94 and apparently by
+ * Donald Becker - it didn't work :)
+ * - skeleton.c v0.05 dated 11/16/93 by Donald Becker
+ * (from Linux Kernel 1.1.45)
+ * - RFC's 1201 and 1051 - re: TCP/IP over ARCnet
+ * - The official ARCnet COM9026 data sheets (!) thanks to
+ * Ken Cornetet <kcornete@nyx10.cs.du.edu>
+ * - The official ARCnet COM20020 data sheets.
+ * - Information on some more obscure ARCnet controller chips, thanks
+ * to the nice people at SMSC.
+ * - net/inet/eth.c (from kernel 1.1.50) for header-building info.
+ * - Alternate Linux ARCnet source by V.Shergin <vsher@sao.stavropol.su>
+ * - Textual information and more alternate source from Joachim Koenig
+ * <jojo@repas.de>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/errqueue.h>
+
+#include <linux/leds.h>
+
+#include "arcdevice.h"
+#include "com9026.h"
+
+/* "do nothing" functions for protocol drivers */
+static void null_rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length);
+static int null_build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr);
+static int null_prepare_tx(struct net_device *dev, struct archdr *pkt,
+ int length, int bufnum);
+
+static void arcnet_rx(struct net_device *dev, int bufnum);
+
+/* one ArcProto per possible proto ID. None of the elements of
+ * arc_proto_map are allowed to be NULL; they will get set to
+ * arc_proto_default instead. It also must not be NULL; if you would like
+ * to set it to NULL, set it to &arc_proto_null instead.
+ */
+struct ArcProto *arc_proto_map[256];
+EXPORT_SYMBOL(arc_proto_map);
+
+struct ArcProto *arc_proto_default;
+EXPORT_SYMBOL(arc_proto_default);
+
+struct ArcProto *arc_bcast_proto;
+EXPORT_SYMBOL(arc_bcast_proto);
+
+struct ArcProto *arc_raw_proto;
+EXPORT_SYMBOL(arc_raw_proto);
+
+static struct ArcProto arc_proto_null = {
+ .suffix = '?',
+ .mtu = XMTU,
+ .is_ip = 0,
+ .rx = null_rx,
+ .build_header = null_build_header,
+ .prepare_tx = null_prepare_tx,
+ .continue_tx = NULL,
+ .ack_tx = NULL
+};
+
+/* Exported function prototypes */
+int arcnet_debug = ARCNET_DEBUG;
+EXPORT_SYMBOL(arcnet_debug);
+
+/* Internal function prototypes */
+static int arcnet_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, const void *daddr,
+ const void *saddr, unsigned len);
+static int go_tx(struct net_device *dev);
+
+static int debug = ARCNET_DEBUG;
+module_param(debug, int, 0);
+MODULE_LICENSE("GPL");
+
+static int __init arcnet_init(void)
+{
+ int count;
+
+ arcnet_debug = debug;
+
+ pr_info("arcnet loaded\n");
+
+ /* initialize the protocol map */
+ arc_raw_proto = arc_proto_default = arc_bcast_proto = &arc_proto_null;
+ for (count = 0; count < 256; count++)
+ arc_proto_map[count] = arc_proto_default;
+
+ if (BUGLVL(D_DURING))
+ pr_info("struct sizes: %zd %zd %zd %zd %zd\n",
+ sizeof(struct arc_hardware),
+ sizeof(struct arc_rfc1201),
+ sizeof(struct arc_rfc1051),
+ sizeof(struct arc_eth_encap),
+ sizeof(struct archdr));
+
+ return 0;
+}
+
+static void __exit arcnet_exit(void)
+{
+}
+
+module_init(arcnet_init);
+module_exit(arcnet_exit);
+
+/* Dump the contents of an sk_buff */
+#if ARCNET_DEBUG_MAX & D_SKB
+void arcnet_dump_skb(struct net_device *dev,
+ struct sk_buff *skb, char *desc)
+{
+ char hdr[32];
+
+ /* dump the packet */
+ snprintf(hdr, sizeof(hdr), "%6s:%s skb->data:", dev->name, desc);
+ print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET,
+ 16, 1, skb->data, skb->len, true);
+}
+EXPORT_SYMBOL(arcnet_dump_skb);
+#endif
+
+/* Dump the contents of an ARCnet buffer */
+#if (ARCNET_DEBUG_MAX & (D_RX | D_TX))
+static void arcnet_dump_packet(struct net_device *dev, int bufnum,
+ char *desc, int take_arcnet_lock)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int i, length;
+ unsigned long flags = 0;
+ static uint8_t buf[512];
+ char hdr[32];
+
+ /* hw.copy_from_card expects IRQ context so take the IRQ lock
+ * to keep it single threaded
+ */
+ if (take_arcnet_lock)
+ spin_lock_irqsave(&lp->lock, flags);
+
+ lp->hw.copy_from_card(dev, bufnum, 0, buf, 512);
+ if (take_arcnet_lock)
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ /* if the offset[0] byte is nonzero, this is a 256-byte packet */
+ length = (buf[2] ? 256 : 512);
+
+ /* dump the packet */
+ snprintf(hdr, sizeof(hdr), "%6s:%s packet dump:", dev->name, desc);
+ print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET,
+ 16, 1, buf, length, true);
+}
+
+#else
+
+#define arcnet_dump_packet(dev, bufnum, desc, take_arcnet_lock) do { } while (0)
+
+#endif
+
+/* Trigger a LED event in response to a ARCNET device event */
+void arcnet_led_event(struct net_device *dev, enum arcnet_led_event event)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ unsigned long led_delay = 350;
+ unsigned long tx_delay = 50;
+
+ switch (event) {
+ case ARCNET_LED_EVENT_RECON:
+ led_trigger_blink_oneshot(lp->recon_led_trig,
+ &led_delay, &led_delay, 0);
+ break;
+ case ARCNET_LED_EVENT_OPEN:
+ led_trigger_event(lp->tx_led_trig, LED_OFF);
+ led_trigger_event(lp->recon_led_trig, LED_OFF);
+ break;
+ case ARCNET_LED_EVENT_STOP:
+ led_trigger_event(lp->tx_led_trig, LED_OFF);
+ led_trigger_event(lp->recon_led_trig, LED_OFF);
+ break;
+ case ARCNET_LED_EVENT_TX:
+ led_trigger_blink_oneshot(lp->tx_led_trig,
+ &tx_delay, &tx_delay, 0);
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(arcnet_led_event);
+
+static void arcnet_led_release(struct device *gendev, void *res)
+{
+ struct arcnet_local *lp = netdev_priv(to_net_dev(gendev));
+
+ led_trigger_unregister_simple(lp->tx_led_trig);
+ led_trigger_unregister_simple(lp->recon_led_trig);
+}
+
+/* Register ARCNET LED triggers for a arcnet device
+ *
+ * This is normally called from a driver's probe function
+ */
+void devm_arcnet_led_init(struct net_device *netdev, int index, int subid)
+{
+ struct arcnet_local *lp = netdev_priv(netdev);
+ void *res;
+
+ res = devres_alloc(arcnet_led_release, 0, GFP_KERNEL);
+ if (!res) {
+ netdev_err(netdev, "cannot register LED triggers\n");
+ return;
+ }
+
+ snprintf(lp->tx_led_trig_name, sizeof(lp->tx_led_trig_name),
+ "arc%d-%d-tx", index, subid);
+ snprintf(lp->recon_led_trig_name, sizeof(lp->recon_led_trig_name),
+ "arc%d-%d-recon", index, subid);
+
+ led_trigger_register_simple(lp->tx_led_trig_name,
+ &lp->tx_led_trig);
+ led_trigger_register_simple(lp->recon_led_trig_name,
+ &lp->recon_led_trig);
+
+ devres_add(&netdev->dev, res);
+}
+EXPORT_SYMBOL_GPL(devm_arcnet_led_init);
+
+/* Unregister a protocol driver from the arc_proto_map. Protocol drivers
+ * are responsible for registering themselves, but the unregister routine
+ * is pretty generic so we'll do it here.
+ */
+void arcnet_unregister_proto(struct ArcProto *proto)
+{
+ int count;
+
+ if (arc_proto_default == proto)
+ arc_proto_default = &arc_proto_null;
+ if (arc_bcast_proto == proto)
+ arc_bcast_proto = arc_proto_default;
+ if (arc_raw_proto == proto)
+ arc_raw_proto = arc_proto_default;
+
+ for (count = 0; count < 256; count++) {
+ if (arc_proto_map[count] == proto)
+ arc_proto_map[count] = arc_proto_default;
+ }
+}
+EXPORT_SYMBOL(arcnet_unregister_proto);
+
+/* Add a buffer to the queue. Only the interrupt handler is allowed to do
+ * this, unless interrupts are disabled.
+ *
+ * Note: we don't check for a full queue, since there aren't enough buffers
+ * to more than fill it.
+ */
+static void release_arcbuf(struct net_device *dev, int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int i;
+
+ lp->buf_queue[lp->first_free_buf++] = bufnum;
+ lp->first_free_buf %= 5;
+
+ if (BUGLVL(D_DURING)) {
+ arc_printk(D_DURING, dev, "release_arcbuf: freed #%d; buffer queue is now: ",
+ bufnum);
+ for (i = lp->next_buf; i != lp->first_free_buf; i = (i + 1) % 5)
+ arc_cont(D_DURING, "#%d ", lp->buf_queue[i]);
+ arc_cont(D_DURING, "\n");
+ }
+}
+
+/* Get a buffer from the queue.
+ * If this returns -1, there are no buffers available.
+ */
+static int get_arcbuf(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int buf = -1, i;
+
+ if (!atomic_dec_and_test(&lp->buf_lock)) {
+ /* already in this function */
+ arc_printk(D_NORMAL, dev, "get_arcbuf: overlap (%d)!\n",
+ lp->buf_lock.counter);
+ } else { /* we can continue */
+ if (lp->next_buf >= 5)
+ lp->next_buf -= 5;
+
+ if (lp->next_buf == lp->first_free_buf) {
+ arc_printk(D_NORMAL, dev, "get_arcbuf: BUG: no buffers are available??\n");
+ } else {
+ buf = lp->buf_queue[lp->next_buf++];
+ lp->next_buf %= 5;
+ }
+ }
+
+ if (BUGLVL(D_DURING)) {
+ arc_printk(D_DURING, dev, "get_arcbuf: got #%d; buffer queue is now: ",
+ buf);
+ for (i = lp->next_buf; i != lp->first_free_buf; i = (i + 1) % 5)
+ arc_cont(D_DURING, "#%d ", lp->buf_queue[i]);
+ arc_cont(D_DURING, "\n");
+ }
+
+ atomic_inc(&lp->buf_lock);
+ return buf;
+}
+
+static int choose_mtu(void)
+{
+ int count, mtu = 65535;
+
+ /* choose the smallest MTU of all available encaps */
+ for (count = 0; count < 256; count++) {
+ if (arc_proto_map[count] != &arc_proto_null &&
+ arc_proto_map[count]->mtu < mtu) {
+ mtu = arc_proto_map[count]->mtu;
+ }
+ }
+
+ return mtu == 65535 ? XMTU : mtu;
+}
+
+static const struct header_ops arcnet_header_ops = {
+ .create = arcnet_header,
+};
+
+static const struct net_device_ops arcnet_netdev_ops = {
+ .ndo_open = arcnet_open,
+ .ndo_stop = arcnet_close,
+ .ndo_start_xmit = arcnet_send_packet,
+ .ndo_tx_timeout = arcnet_timeout,
+};
+
+/* Setup a struct device for ARCnet. */
+static void arcdev_setup(struct net_device *dev)
+{
+ dev->type = ARPHRD_ARCNET;
+ dev->netdev_ops = &arcnet_netdev_ops;
+ dev->header_ops = &arcnet_header_ops;
+ dev->hard_header_len = sizeof(struct arc_hardware);
+ dev->mtu = choose_mtu();
+
+ dev->addr_len = ARCNET_ALEN;
+ dev->tx_queue_len = 100;
+ dev->broadcast[0] = 0x00; /* for us, broadcasts are address 0 */
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ /* New-style flags. */
+ dev->flags = IFF_BROADCAST;
+}
+
+static void arcnet_timer(struct timer_list *t)
+{
+ struct arcnet_local *lp = from_timer(lp, t, timer);
+ struct net_device *dev = lp->dev;
+
+ if (!netif_carrier_ok(dev)) {
+ netif_carrier_on(dev);
+ netdev_info(dev, "link up\n");
+ }
+}
+
+static void arcnet_reply_tasklet(unsigned long data)
+{
+ struct arcnet_local *lp = (struct arcnet_local *)data;
+
+ struct sk_buff *ackskb, *skb;
+ struct sock_exterr_skb *serr;
+ struct sock *sk;
+ int ret;
+
+ local_irq_disable();
+ skb = lp->outgoing.skb;
+ if (!skb || !skb->sk) {
+ local_irq_enable();
+ return;
+ }
+
+ sock_hold(skb->sk);
+ sk = skb->sk;
+ ackskb = skb_clone_sk(skb);
+ sock_put(skb->sk);
+
+ if (!ackskb) {
+ local_irq_enable();
+ return;
+ }
+
+ serr = SKB_EXT_ERR(ackskb);
+ memset(serr, 0, sizeof(*serr));
+ serr->ee.ee_errno = ENOMSG;
+ serr->ee.ee_origin = SO_EE_ORIGIN_TXSTATUS;
+ serr->ee.ee_data = skb_shinfo(skb)->tskey;
+ serr->ee.ee_info = lp->reply_status;
+
+ /* finally erasing outgoing skb */
+ dev_kfree_skb(lp->outgoing.skb);
+ lp->outgoing.skb = NULL;
+
+ ackskb->dev = lp->dev;
+
+ ret = sock_queue_err_skb(sk, ackskb);
+ if (ret)
+ kfree_skb(ackskb);
+
+ local_irq_enable();
+};
+
+struct net_device *alloc_arcdev(const char *name)
+{
+ struct net_device *dev;
+
+ dev = alloc_netdev(sizeof(struct arcnet_local),
+ name && *name ? name : "arc%d", NET_NAME_UNKNOWN,
+ arcdev_setup);
+ if (dev) {
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ lp->dev = dev;
+ spin_lock_init(&lp->lock);
+ timer_setup(&lp->timer, arcnet_timer, 0);
+ }
+
+ return dev;
+}
+EXPORT_SYMBOL(alloc_arcdev);
+
+/* Open/initialize the board. This is called sometime after booting when
+ * the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even registers
+ * that "should" only need to be set once at boot, so that there is
+ * non-reboot way to recover if something goes wrong.
+ */
+int arcnet_open(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int count, newmtu, error;
+
+ arc_printk(D_INIT, dev, "opened.");
+
+ if (!try_module_get(lp->hw.owner))
+ return -ENODEV;
+
+ if (BUGLVL(D_PROTO)) {
+ arc_printk(D_PROTO, dev, "protocol map (default is '%c'): ",
+ arc_proto_default->suffix);
+ for (count = 0; count < 256; count++)
+ arc_cont(D_PROTO, "%c", arc_proto_map[count]->suffix);
+ arc_cont(D_PROTO, "\n");
+ }
+
+ tasklet_init(&lp->reply_tasklet, arcnet_reply_tasklet,
+ (unsigned long)lp);
+
+ arc_printk(D_INIT, dev, "arcnet_open: resetting card.\n");
+
+ /* try to put the card in a defined state - if it fails the first
+ * time, actually reset it.
+ */
+ error = -ENODEV;
+ if (lp->hw.reset(dev, 0) && lp->hw.reset(dev, 1))
+ goto out_module_put;
+
+ newmtu = choose_mtu();
+ if (newmtu < dev->mtu)
+ dev->mtu = newmtu;
+
+ arc_printk(D_INIT, dev, "arcnet_open: mtu: %d.\n", dev->mtu);
+
+ /* autodetect the encapsulation for each host. */
+ memset(lp->default_proto, 0, sizeof(lp->default_proto));
+
+ /* the broadcast address is special - use the 'bcast' protocol */
+ for (count = 0; count < 256; count++) {
+ if (arc_proto_map[count] == arc_bcast_proto) {
+ lp->default_proto[0] = count;
+ break;
+ }
+ }
+
+ /* initialize buffers */
+ atomic_set(&lp->buf_lock, 1);
+
+ lp->next_buf = lp->first_free_buf = 0;
+ release_arcbuf(dev, 0);
+ release_arcbuf(dev, 1);
+ release_arcbuf(dev, 2);
+ release_arcbuf(dev, 3);
+ lp->cur_tx = lp->next_tx = -1;
+ lp->cur_rx = -1;
+
+ lp->rfc1201.sequence = 1;
+
+ /* bring up the hardware driver */
+ if (lp->hw.open)
+ lp->hw.open(dev);
+
+ if (dev->dev_addr[0] == 0)
+ arc_printk(D_NORMAL, dev, "WARNING! Station address 00 is reserved for broadcasts!\n");
+ else if (dev->dev_addr[0] == 255)
+ arc_printk(D_NORMAL, dev, "WARNING! Station address FF may confuse DOS networking programs!\n");
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ if (lp->hw.status(dev) & RESETflag) {
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
+ __FILE__, __LINE__, __func__);
+ lp->hw.command(dev, CFLAGScmd | RESETclear);
+ }
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ /* make sure we're ready to receive IRQ's. */
+ lp->hw.intmask(dev, 0);
+ udelay(1); /* give it time to set the mask before
+ * we reset it again. (may not even be
+ * necessary)
+ */
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ lp->intmask = NORXflag | RECONflag;
+ lp->hw.intmask(dev, lp->intmask);
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+ netif_carrier_off(dev);
+ netif_start_queue(dev);
+ mod_timer(&lp->timer, jiffies + msecs_to_jiffies(1000));
+
+ arcnet_led_event(dev, ARCNET_LED_EVENT_OPEN);
+ return 0;
+
+ out_module_put:
+ module_put(lp->hw.owner);
+ return error;
+}
+EXPORT_SYMBOL(arcnet_open);
+
+/* The inverse routine to arcnet_open - shuts down the card. */
+int arcnet_close(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ arcnet_led_event(dev, ARCNET_LED_EVENT_STOP);
+ del_timer_sync(&lp->timer);
+
+ netif_stop_queue(dev);
+ netif_carrier_off(dev);
+
+ tasklet_kill(&lp->reply_tasklet);
+
+ /* flush TX and disable RX */
+ lp->hw.intmask(dev, 0);
+ lp->hw.command(dev, NOTXcmd); /* stop transmit */
+ lp->hw.command(dev, NORXcmd); /* disable receive */
+ mdelay(1);
+
+ /* shut down the card */
+ lp->hw.close(dev);
+ module_put(lp->hw.owner);
+ return 0;
+}
+EXPORT_SYMBOL(arcnet_close);
+
+static int arcnet_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, const void *daddr,
+ const void *saddr, unsigned len)
+{
+ const struct arcnet_local *lp = netdev_priv(dev);
+ uint8_t _daddr, proto_num;
+ struct ArcProto *proto;
+
+ arc_printk(D_DURING, dev,
+ "create header from %d to %d; protocol %d (%Xh); size %u.\n",
+ saddr ? *(uint8_t *)saddr : -1,
+ daddr ? *(uint8_t *)daddr : -1,
+ type, type, len);
+
+ if (skb->len != 0 && len != skb->len)
+ arc_printk(D_NORMAL, dev, "arcnet_header: Yikes! skb->len(%d) != len(%d)!\n",
+ skb->len, len);
+
+ /* Type is host order - ? */
+ if (type == ETH_P_ARCNET) {
+ proto = arc_raw_proto;
+ arc_printk(D_DEBUG, dev, "arc_raw_proto used. proto='%c'\n",
+ proto->suffix);
+ _daddr = daddr ? *(uint8_t *)daddr : 0;
+ } else if (!daddr) {
+ /* if the dest addr isn't provided, we can't choose an
+ * encapsulation! Store the packet type (eg. ETH_P_IP)
+ * for now, and we'll push on a real header when we do
+ * rebuild_header.
+ */
+ *(uint16_t *)skb_push(skb, 2) = type;
+ /* XXX: Why not use skb->mac_len? */
+ if (skb->network_header - skb->mac_header != 2)
+ arc_printk(D_NORMAL, dev, "arcnet_header: Yikes! diff (%u) is not 2!\n",
+ skb->network_header - skb->mac_header);
+ return -2; /* return error -- can't transmit yet! */
+ } else {
+ /* otherwise, we can just add the header as usual. */
+ _daddr = *(uint8_t *)daddr;
+ proto_num = lp->default_proto[_daddr];
+ proto = arc_proto_map[proto_num];
+ arc_printk(D_DURING, dev, "building header for %02Xh using protocol '%c'\n",
+ proto_num, proto->suffix);
+ if (proto == &arc_proto_null && arc_bcast_proto != proto) {
+ arc_printk(D_DURING, dev, "actually, let's use '%c' instead.\n",
+ arc_bcast_proto->suffix);
+ proto = arc_bcast_proto;
+ }
+ }
+ return proto->build_header(skb, dev, type, _daddr);
+}
+
+/* Called by the kernel in order to transmit a packet. */
+netdev_tx_t arcnet_send_packet(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct archdr *pkt;
+ struct arc_rfc1201 *soft;
+ struct ArcProto *proto;
+ int txbuf;
+ unsigned long flags;
+ int retval;
+
+ arc_printk(D_DURING, dev,
+ "transmit requested (status=%Xh, txbufs=%d/%d, len=%d, protocol %x)\n",
+ lp->hw.status(dev), lp->cur_tx, lp->next_tx, skb->len, skb->protocol);
+
+ pkt = (struct archdr *)skb->data;
+ soft = &pkt->soft.rfc1201;
+ proto = arc_proto_map[soft->proto];
+
+ arc_printk(D_SKB_SIZE, dev, "skb: transmitting %d bytes to %02X\n",
+ skb->len, pkt->hard.dest);
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "tx");
+
+ /* fits in one packet? */
+ if (skb->len - ARC_HDR_SIZE > XMTU && !proto->continue_tx) {
+ arc_printk(D_NORMAL, dev, "fixme: packet too large: compensating badly!\n");
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK; /* don't try again */
+ }
+
+ /* We're busy transmitting a packet... */
+ netif_stop_queue(dev);
+
+ spin_lock_irqsave(&lp->lock, flags);
+ lp->hw.intmask(dev, 0);
+ if (lp->next_tx == -1)
+ txbuf = get_arcbuf(dev);
+ else
+ txbuf = -1;
+
+ if (txbuf != -1) {
+ lp->outgoing.skb = skb;
+ if (proto->prepare_tx(dev, pkt, skb->len, txbuf) &&
+ !proto->ack_tx) {
+ /* done right away and we don't want to acknowledge
+ * the package later - forget about it now
+ */
+ dev->stats.tx_bytes += skb->len;
+ } else {
+ /* do it the 'split' way */
+ lp->outgoing.proto = proto;
+ lp->outgoing.skb = skb;
+ lp->outgoing.pkt = pkt;
+
+ if (proto->continue_tx &&
+ proto->continue_tx(dev, txbuf)) {
+ arc_printk(D_NORMAL, dev,
+ "bug! continue_tx finished the first time! (proto='%c')\n",
+ proto->suffix);
+ }
+ }
+ retval = NETDEV_TX_OK;
+ lp->next_tx = txbuf;
+ } else {
+ retval = NETDEV_TX_BUSY;
+ }
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n",
+ __FILE__, __LINE__, __func__, lp->hw.status(dev));
+ /* make sure we didn't ignore a TX IRQ while we were in here */
+ lp->hw.intmask(dev, 0);
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ lp->intmask |= TXFREEflag | EXCNAKflag;
+ lp->hw.intmask(dev, lp->intmask);
+ arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n",
+ __FILE__, __LINE__, __func__, lp->hw.status(dev));
+
+ arcnet_led_event(dev, ARCNET_LED_EVENT_TX);
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+ return retval; /* no need to try again */
+}
+EXPORT_SYMBOL(arcnet_send_packet);
+
+/* Actually start transmitting a packet that was loaded into a buffer
+ * by prepare_tx. This should _only_ be called by the interrupt handler.
+ */
+static int go_tx(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ arc_printk(D_DURING, dev, "go_tx: status=%Xh, intmask=%Xh, next_tx=%d, cur_tx=%d\n",
+ lp->hw.status(dev), lp->intmask, lp->next_tx, lp->cur_tx);
+
+ if (lp->cur_tx != -1 || lp->next_tx == -1)
+ return 0;
+
+ if (BUGLVL(D_TX))
+ arcnet_dump_packet(dev, lp->next_tx, "go_tx", 0);
+
+ lp->cur_tx = lp->next_tx;
+ lp->next_tx = -1;
+
+ /* start sending */
+ lp->hw.command(dev, TXcmd | (lp->cur_tx << 3));
+
+ dev->stats.tx_packets++;
+ lp->lasttrans_dest = lp->lastload_dest;
+ lp->lastload_dest = 0;
+ lp->excnak_pending = 0;
+ lp->intmask |= TXFREEflag | EXCNAKflag;
+
+ return 1;
+}
+
+/* Called by the kernel when transmit times out */
+void arcnet_timeout(struct net_device *dev)
+{
+ unsigned long flags;
+ struct arcnet_local *lp = netdev_priv(dev);
+ int status = lp->hw.status(dev);
+ char *msg;
+
+ spin_lock_irqsave(&lp->lock, flags);
+ if (status & TXFREEflag) { /* transmit _DID_ finish */
+ msg = " - missed IRQ?";
+ } else {
+ msg = "";
+ dev->stats.tx_aborted_errors++;
+ lp->timed_out = 1;
+ lp->hw.command(dev, NOTXcmd | (lp->cur_tx << 3));
+ }
+ dev->stats.tx_errors++;
+
+ /* make sure we didn't miss a TX or a EXC NAK IRQ */
+ lp->hw.intmask(dev, 0);
+ lp->intmask |= TXFREEflag | EXCNAKflag;
+ lp->hw.intmask(dev, lp->intmask);
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ if (time_after(jiffies, lp->last_timeout + 10 * HZ)) {
+ arc_printk(D_EXTRA, dev, "tx timed out%s (status=%Xh, intmask=%Xh, dest=%02Xh)\n",
+ msg, status, lp->intmask, lp->lasttrans_dest);
+ lp->last_timeout = jiffies;
+ }
+
+ if (lp->cur_tx == -1)
+ netif_wake_queue(dev);
+}
+EXPORT_SYMBOL(arcnet_timeout);
+
+/* The typical workload of the driver: Handle the network interface
+ * interrupts. Establish which device needs attention, and call the correct
+ * chipset interrupt handler.
+ */
+irqreturn_t arcnet_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct arcnet_local *lp;
+ int recbuf, status, diagstatus, didsomething, boguscount;
+ unsigned long flags;
+ int retval = IRQ_NONE;
+
+ arc_printk(D_DURING, dev, "\n");
+
+ arc_printk(D_DURING, dev, "in arcnet_interrupt\n");
+
+ lp = netdev_priv(dev);
+ BUG_ON(!lp);
+
+ spin_lock_irqsave(&lp->lock, flags);
+
+ /* RESET flag was enabled - if device is not running, we must
+ * clear it right away (but nothing else).
+ */
+ if (!netif_running(dev)) {
+ if (lp->hw.status(dev) & RESETflag)
+ lp->hw.command(dev, CFLAGScmd | RESETclear);
+ lp->hw.intmask(dev, 0);
+ spin_unlock_irqrestore(&lp->lock, flags);
+ return retval;
+ }
+
+ arc_printk(D_DURING, dev, "in arcnet_inthandler (status=%Xh, intmask=%Xh)\n",
+ lp->hw.status(dev), lp->intmask);
+
+ boguscount = 5;
+ do {
+ status = lp->hw.status(dev);
+ diagstatus = (status >> 8) & 0xFF;
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s: status=%x\n",
+ __FILE__, __LINE__, __func__, status);
+ didsomething = 0;
+
+ /* RESET flag was enabled - card is resetting and if RX is
+ * disabled, it's NOT because we just got a packet.
+ *
+ * The card is in an undefined state.
+ * Clear it out and start over.
+ */
+ if (status & RESETflag) {
+ arc_printk(D_NORMAL, dev, "spurious reset (status=%Xh)\n",
+ status);
+ arcnet_close(dev);
+ arcnet_open(dev);
+
+ /* get out of the interrupt handler! */
+ break;
+ }
+ /* RX is inhibited - we must have received something.
+ * Prepare to receive into the next buffer.
+ *
+ * We don't actually copy the received packet from the card
+ * until after the transmit handler runs (and possibly
+ * launches the next tx); this should improve latency slightly
+ * if we get both types of interrupts at once.
+ */
+ recbuf = -1;
+ if (status & lp->intmask & NORXflag) {
+ recbuf = lp->cur_rx;
+ arc_printk(D_DURING, dev, "Buffer #%d: receive irq (status=%Xh)\n",
+ recbuf, status);
+
+ lp->cur_rx = get_arcbuf(dev);
+ if (lp->cur_rx != -1) {
+ arc_printk(D_DURING, dev, "enabling receive to buffer #%d\n",
+ lp->cur_rx);
+ lp->hw.command(dev, RXcmd | (lp->cur_rx << 3) | RXbcasts);
+ }
+ didsomething++;
+ }
+
+ if ((diagstatus & EXCNAKflag)) {
+ arc_printk(D_DURING, dev, "EXCNAK IRQ (diagstat=%Xh)\n",
+ diagstatus);
+
+ lp->hw.command(dev, NOTXcmd); /* disable transmit */
+ lp->excnak_pending = 1;
+
+ lp->hw.command(dev, EXCNAKclear);
+ lp->intmask &= ~(EXCNAKflag);
+ didsomething++;
+ }
+
+ /* a transmit finished, and we're interested in it. */
+ if ((status & lp->intmask & TXFREEflag) || lp->timed_out) {
+ int ackstatus;
+ lp->intmask &= ~(TXFREEflag | EXCNAKflag);
+
+ if (status & TXACKflag)
+ ackstatus = 2;
+ else if (lp->excnak_pending)
+ ackstatus = 1;
+ else
+ ackstatus = 0;
+
+ arc_printk(D_DURING, dev, "TX IRQ (stat=%Xh)\n",
+ status);
+
+ if (lp->cur_tx != -1 && !lp->timed_out) {
+ if (!(status & TXACKflag)) {
+ if (lp->lasttrans_dest != 0) {
+ arc_printk(D_EXTRA, dev,
+ "transmit was not acknowledged! (status=%Xh, dest=%02Xh)\n",
+ status,
+ lp->lasttrans_dest);
+ dev->stats.tx_errors++;
+ dev->stats.tx_carrier_errors++;
+ } else {
+ arc_printk(D_DURING, dev,
+ "broadcast was not acknowledged; that's normal (status=%Xh, dest=%02Xh)\n",
+ status,
+ lp->lasttrans_dest);
+ }
+ }
+
+ if (lp->outgoing.proto &&
+ lp->outgoing.proto->ack_tx) {
+ lp->outgoing.proto
+ ->ack_tx(dev, ackstatus);
+ }
+ lp->reply_status = ackstatus;
+ tasklet_hi_schedule(&lp->reply_tasklet);
+ }
+ if (lp->cur_tx != -1)
+ release_arcbuf(dev, lp->cur_tx);
+
+ lp->cur_tx = -1;
+ lp->timed_out = 0;
+ didsomething++;
+
+ /* send another packet if there is one */
+ go_tx(dev);
+
+ /* continue a split packet, if any */
+ if (lp->outgoing.proto &&
+ lp->outgoing.proto->continue_tx) {
+ int txbuf = get_arcbuf(dev);
+
+ if (txbuf != -1) {
+ if (lp->outgoing.proto->continue_tx(dev, txbuf)) {
+ /* that was the last segment */
+ dev->stats.tx_bytes += lp->outgoing.skb->len;
+ if (!lp->outgoing.proto->ack_tx) {
+ dev_kfree_skb_irq(lp->outgoing.skb);
+ lp->outgoing.proto = NULL;
+ }
+ }
+ lp->next_tx = txbuf;
+ }
+ }
+ /* inform upper layers of idleness, if necessary */
+ if (lp->cur_tx == -1)
+ netif_wake_queue(dev);
+ }
+ /* now process the received packet, if any */
+ if (recbuf != -1) {
+ if (BUGLVL(D_RX))
+ arcnet_dump_packet(dev, recbuf, "rx irq", 0);
+
+ arcnet_rx(dev, recbuf);
+ release_arcbuf(dev, recbuf);
+
+ didsomething++;
+ }
+ if (status & lp->intmask & RECONflag) {
+ lp->hw.command(dev, CFLAGScmd | CONFIGclear);
+ dev->stats.tx_carrier_errors++;
+
+ arc_printk(D_RECON, dev, "Network reconfiguration detected (status=%Xh)\n",
+ status);
+ if (netif_carrier_ok(dev)) {
+ netif_carrier_off(dev);
+ netdev_info(dev, "link down\n");
+ }
+ mod_timer(&lp->timer, jiffies + msecs_to_jiffies(1000));
+
+ arcnet_led_event(dev, ARCNET_LED_EVENT_RECON);
+ /* MYRECON bit is at bit 7 of diagstatus */
+ if (diagstatus & 0x80)
+ arc_printk(D_RECON, dev, "Put out that recon myself\n");
+
+ /* is the RECON info empty or old? */
+ if (!lp->first_recon || !lp->last_recon ||
+ time_after(jiffies, lp->last_recon + HZ * 10)) {
+ if (lp->network_down)
+ arc_printk(D_NORMAL, dev, "reconfiguration detected: cabling restored?\n");
+ lp->first_recon = lp->last_recon = jiffies;
+ lp->num_recons = lp->network_down = 0;
+
+ arc_printk(D_DURING, dev, "recon: clearing counters.\n");
+ } else { /* add to current RECON counter */
+ lp->last_recon = jiffies;
+ lp->num_recons++;
+
+ arc_printk(D_DURING, dev, "recon: counter=%d, time=%lds, net=%d\n",
+ lp->num_recons,
+ (lp->last_recon - lp->first_recon) / HZ,
+ lp->network_down);
+
+ /* if network is marked up;
+ * and first_recon and last_recon are 60+ apart;
+ * and the average no. of recons counted is
+ * > RECON_THRESHOLD/min;
+ * then print a warning message.
+ */
+ if (!lp->network_down &&
+ (lp->last_recon - lp->first_recon) <= HZ * 60 &&
+ lp->num_recons >= RECON_THRESHOLD) {
+ lp->network_down = 1;
+ arc_printk(D_NORMAL, dev, "many reconfigurations detected: cabling problem?\n");
+ } else if (!lp->network_down &&
+ lp->last_recon - lp->first_recon > HZ * 60) {
+ /* reset counters if we've gone for
+ * over a minute.
+ */
+ lp->first_recon = lp->last_recon;
+ lp->num_recons = 1;
+ }
+ }
+ } else if (lp->network_down &&
+ time_after(jiffies, lp->last_recon + HZ * 10)) {
+ if (lp->network_down)
+ arc_printk(D_NORMAL, dev, "cabling restored?\n");
+ lp->first_recon = lp->last_recon = 0;
+ lp->num_recons = lp->network_down = 0;
+
+ arc_printk(D_DURING, dev, "not recon: clearing counters anyway.\n");
+ netif_carrier_on(dev);
+ }
+
+ if (didsomething)
+ retval |= IRQ_HANDLED;
+ } while (--boguscount && didsomething);
+
+ arc_printk(D_DURING, dev, "arcnet_interrupt complete (status=%Xh, count=%d)\n",
+ lp->hw.status(dev), boguscount);
+ arc_printk(D_DURING, dev, "\n");
+
+ lp->hw.intmask(dev, 0);
+ udelay(1);
+ lp->hw.intmask(dev, lp->intmask);
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+ return retval;
+}
+EXPORT_SYMBOL(arcnet_interrupt);
+
+/* This is a generic packet receiver that calls arcnet??_rx depending on the
+ * protocol ID found.
+ */
+static void arcnet_rx(struct net_device *dev, int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct archdr pkt;
+ struct arc_rfc1201 *soft;
+ int length, ofs;
+
+ soft = &pkt.soft.rfc1201;
+
+ lp->hw.copy_from_card(dev, bufnum, 0, &pkt, ARC_HDR_SIZE);
+ if (pkt.hard.offset[0]) {
+ ofs = pkt.hard.offset[0];
+ length = 256 - ofs;
+ } else {
+ ofs = pkt.hard.offset[1];
+ length = 512 - ofs;
+ }
+
+ /* get the full header, if possible */
+ if (sizeof(pkt.soft) <= length) {
+ lp->hw.copy_from_card(dev, bufnum, ofs, soft, sizeof(pkt.soft));
+ } else {
+ memset(&pkt.soft, 0, sizeof(pkt.soft));
+ lp->hw.copy_from_card(dev, bufnum, ofs, soft, length);
+ }
+
+ arc_printk(D_DURING, dev, "Buffer #%d: received packet from %02Xh to %02Xh (%d+4 bytes)\n",
+ bufnum, pkt.hard.source, pkt.hard.dest, length);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += length + ARC_HDR_SIZE;
+
+ /* call the right receiver for the protocol */
+ if (arc_proto_map[soft->proto]->is_ip) {
+ if (BUGLVL(D_PROTO)) {
+ struct ArcProto
+ *oldp = arc_proto_map[lp->default_proto[pkt.hard.source]],
+ *newp = arc_proto_map[soft->proto];
+
+ if (oldp != newp) {
+ arc_printk(D_PROTO, dev,
+ "got protocol %02Xh; encap for host %02Xh is now '%c' (was '%c')\n",
+ soft->proto, pkt.hard.source,
+ newp->suffix, oldp->suffix);
+ }
+ }
+
+ /* broadcasts will always be done with the last-used encap. */
+ lp->default_proto[0] = soft->proto;
+
+ /* in striking contrast, the following isn't a hack. */
+ lp->default_proto[pkt.hard.source] = soft->proto;
+ }
+ /* call the protocol-specific receiver. */
+ arc_proto_map[soft->proto]->rx(dev, bufnum, &pkt, length);
+}
+
+static void null_rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length)
+{
+ arc_printk(D_PROTO, dev,
+ "rx: don't know how to deal with proto %02Xh from host %02Xh.\n",
+ pkthdr->soft.rfc1201.proto, pkthdr->hard.source);
+}
+
+static int null_build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ arc_printk(D_PROTO, dev,
+ "tx: can't build header for encap %02Xh; load a protocol driver.\n",
+ lp->default_proto[daddr]);
+
+ /* always fails */
+ return 0;
+}
+
+/* the "do nothing" prepare_tx function warns that there's nothing to do. */
+static int null_prepare_tx(struct net_device *dev, struct archdr *pkt,
+ int length, int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct arc_hardware newpkt;
+
+ arc_printk(D_PROTO, dev, "tx: no encap for this host; load a protocol driver.\n");
+
+ /* send a packet to myself -- will never get received, of course */
+ newpkt.source = newpkt.dest = dev->dev_addr[0];
+
+ /* only one byte of actual data (and it's random) */
+ newpkt.offset[0] = 0xFF;
+
+ lp->hw.copy_to_card(dev, bufnum, 0, &newpkt, ARC_HDR_SIZE);
+
+ return 1; /* done */
+}
diff --git a/drivers/net/arcnet/capmode.c b/drivers/net/arcnet/capmode.c
new file mode 100644
index 0000000..b780be6
--- /dev/null
+++ b/drivers/net/arcnet/capmode.c
@@ -0,0 +1,268 @@
+/*
+ * Linux ARCnet driver - "cap mode" packet encapsulation.
+ * It adds sequence numbers to packets for communicating between a user space
+ * application and the driver. After a transmit it sends a packet with protocol
+ * byte 0 back up to the userspace containing the sequence number of the packet
+ * plus the transmit-status on the ArcNet.
+ *
+ * Written 2002-4 by Esben Nielsen, Vestas Wind Systems A/S
+ * Derived from arc-rawmode.c by Avery Pennarun.
+ * arc-rawmode was in turned based on skeleton.c, see below.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+#include "arcdevice.h"
+
+/* packet receiver */
+static void rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sk_buff *skb;
+ struct archdr *pkt = pkthdr;
+ char *pktbuf, *pkthdrbuf;
+ int ofs;
+
+ arc_printk(D_DURING, dev, "it's a raw(cap) packet (length=%d)\n",
+ length);
+
+ if (length >= MinTU)
+ ofs = 512 - length;
+ else
+ ofs = 256 - length;
+
+ skb = alloc_skb(length + ARC_HDR_SIZE + sizeof(int), GFP_ATOMIC);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb_put(skb, length + ARC_HDR_SIZE + sizeof(int));
+ skb->dev = dev;
+ skb_reset_mac_header(skb);
+ pkt = (struct archdr *)skb_mac_header(skb);
+ skb_pull(skb, ARC_HDR_SIZE);
+
+ /* up to sizeof(pkt->soft) has already been copied from the card
+ * squeeze in an int for the cap encapsulation
+ * use these variables to be sure we count in bytes, not in
+ * sizeof(struct archdr)
+ */
+ pktbuf = (char *)pkt;
+ pkthdrbuf = (char *)pkthdr;
+ memcpy(pktbuf, pkthdrbuf, ARC_HDR_SIZE + sizeof(pkt->soft.cap.proto));
+ memcpy(pktbuf + ARC_HDR_SIZE + sizeof(pkt->soft.cap.proto) + sizeof(int),
+ pkthdrbuf + ARC_HDR_SIZE + sizeof(pkt->soft.cap.proto),
+ sizeof(struct archdr) - ARC_HDR_SIZE - sizeof(pkt->soft.cap.proto));
+
+ if (length > sizeof(pkt->soft))
+ lp->hw.copy_from_card(dev, bufnum, ofs + sizeof(pkt->soft),
+ pkt->soft.raw + sizeof(pkt->soft)
+ + sizeof(int),
+ length - sizeof(pkt->soft));
+
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "rx");
+
+ skb->protocol = cpu_to_be16(ETH_P_ARCNET);
+ netif_rx(skb);
+}
+
+/* Create the ARCnet hard/soft headers for cap mode.
+ * There aren't any soft headers in cap mode - not even the protocol id.
+ */
+static int build_header(struct sk_buff *skb,
+ struct net_device *dev,
+ unsigned short type,
+ uint8_t daddr)
+{
+ int hdr_size = ARC_HDR_SIZE;
+ struct archdr *pkt = skb_push(skb, hdr_size);
+
+ arc_printk(D_PROTO, dev, "Preparing header for cap packet %x.\n",
+ *((int *)&pkt->soft.cap.cookie[0]));
+
+ /* Set the source hardware address.
+ *
+ * This is pretty pointless for most purposes, but it can help in
+ * debugging. ARCnet does not allow us to change the source address in
+ * the actual packet sent)
+ */
+ pkt->hard.source = *dev->dev_addr;
+
+ /* see linux/net/ethernet/eth.c to see where I got the following */
+
+ if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
+ /* FIXME: fill in the last byte of the dest ipaddr here to
+ * better comply with RFC1051 in "noarp" mode.
+ */
+ pkt->hard.dest = 0;
+ return hdr_size;
+ }
+ /* otherwise, just fill it in and go! */
+ pkt->hard.dest = daddr;
+
+ return hdr_size; /* success */
+}
+
+static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
+ int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct arc_hardware *hard = &pkt->hard;
+ int ofs;
+
+ /* hard header is not included in packet length */
+ length -= ARC_HDR_SIZE;
+ /* And neither is the cookie field */
+ length -= sizeof(int);
+
+ arc_printk(D_DURING, dev, "prepare_tx: txbufs=%d/%d/%d\n",
+ lp->next_tx, lp->cur_tx, bufnum);
+
+ arc_printk(D_PROTO, dev, "Sending for cap packet %x.\n",
+ *((int *)&pkt->soft.cap.cookie[0]));
+
+ if (length > XMTU) {
+ /* should never happen! other people already check for this. */
+ arc_printk(D_NORMAL, dev, "Bug! prepare_tx with size %d (> %d)\n",
+ length, XMTU);
+ length = XMTU;
+ }
+ if (length > MinTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - length;
+ } else if (length > MTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - length - 3;
+ } else {
+ hard->offset[0] = ofs = 256 - length;
+ }
+
+ arc_printk(D_DURING, dev, "prepare_tx: length=%d ofs=%d\n",
+ length, ofs);
+
+ /* Copy the arcnet-header + the protocol byte down: */
+ lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
+ lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft.cap.proto,
+ sizeof(pkt->soft.cap.proto));
+
+ /* Skip the extra integer we have written into it as a cookie
+ * but write the rest of the message:
+ */
+ lp->hw.copy_to_card(dev, bufnum, ofs + 1,
+ ((unsigned char *)&pkt->soft.cap.mes), length - 1);
+
+ lp->lastload_dest = hard->dest;
+
+ return 1; /* done */
+}
+
+static int ack_tx(struct net_device *dev, int acked)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sk_buff *ackskb;
+ struct archdr *ackpkt;
+ int length = sizeof(struct arc_cap);
+
+ arc_printk(D_DURING, dev, "capmode: ack_tx: protocol: %x: result: %d\n",
+ lp->outgoing.skb->protocol, acked);
+
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, lp->outgoing.skb, "ack_tx");
+
+ /* Now alloc a skb to send back up through the layers: */
+ ackskb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
+ if (!ackskb)
+ goto free_outskb;
+
+ skb_put(ackskb, length + ARC_HDR_SIZE);
+ ackskb->dev = dev;
+
+ skb_reset_mac_header(ackskb);
+ ackpkt = (struct archdr *)skb_mac_header(ackskb);
+ /* skb_pull(ackskb, ARC_HDR_SIZE); */
+
+ skb_copy_from_linear_data(lp->outgoing.skb, ackpkt,
+ ARC_HDR_SIZE + sizeof(struct arc_cap));
+ ackpkt->soft.cap.proto = 0; /* using protocol 0 for acknowledge */
+ ackpkt->soft.cap.mes.ack = acked;
+
+ arc_printk(D_PROTO, dev, "Acknowledge for cap packet %x.\n",
+ *((int *)&ackpkt->soft.cap.cookie[0]));
+
+ ackskb->protocol = cpu_to_be16(ETH_P_ARCNET);
+
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, ackskb, "ack_tx_recv");
+ netif_rx(ackskb);
+
+free_outskb:
+ dev_kfree_skb_irq(lp->outgoing.skb);
+ lp->outgoing.proto = NULL;
+ /* We are always finished when in this protocol */
+
+ return 0;
+}
+
+static struct ArcProto capmode_proto = {
+ .suffix = 'r',
+ .mtu = XMTU,
+ .rx = rx,
+ .build_header = build_header,
+ .prepare_tx = prepare_tx,
+ .ack_tx = ack_tx
+};
+
+static int __init capmode_module_init(void)
+{
+ int count;
+
+ pr_info("cap mode (`c') encapsulation support loaded\n");
+
+ for (count = 1; count <= 8; count++)
+ if (arc_proto_map[count] == arc_proto_default)
+ arc_proto_map[count] = &capmode_proto;
+
+ /* for cap mode, we only set the bcast proto if there's no better one */
+ if (arc_bcast_proto == arc_proto_default)
+ arc_bcast_proto = &capmode_proto;
+
+ arc_proto_default = &capmode_proto;
+ arc_raw_proto = &capmode_proto;
+
+ return 0;
+}
+
+static void __exit capmode_module_exit(void)
+{
+ arcnet_unregister_proto(&capmode_proto);
+}
+module_init(capmode_module_init);
+module_exit(capmode_module_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/arcnet/com20020-isa.c b/drivers/net/arcnet/com20020-isa.c
new file mode 100644
index 0000000..38fa60d
--- /dev/null
+++ b/drivers/net/arcnet/com20020-isa.c
@@ -0,0 +1,223 @@
+/*
+ * Linux ARCnet driver - COM20020 chipset support
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/bootmem.h>
+#include <linux/io.h>
+
+#include "arcdevice.h"
+#include "com20020.h"
+
+/* We cannot (yet) probe for an IO mapped card, although we can check that
+ * it's where we were told it was, and even do autoirq.
+ */
+static int __init com20020isa_probe(struct net_device *dev)
+{
+ int ioaddr;
+ unsigned long airqmask;
+ struct arcnet_local *lp = netdev_priv(dev);
+ int err;
+
+ if (BUGLVL(D_NORMAL))
+ pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)");
+
+ ioaddr = dev->base_addr;
+ if (!ioaddr) {
+ arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");
+ return -ENODEV;
+ }
+ if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
+ arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n",
+ ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
+ return -ENXIO;
+ }
+ if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
+ arc_printk(D_NORMAL, dev, "IO address %x empty\n", ioaddr);
+ err = -ENODEV;
+ goto out;
+ }
+ if (com20020_check(dev)) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ if (!dev->irq) {
+ /* if we do this, we're sure to get an IRQ since the
+ * card has just reset and the NORXflag is on until
+ * we tell it to start receiving.
+ */
+ arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n",
+ arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
+ arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
+ airqmask = probe_irq_on();
+ arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
+ udelay(1);
+ arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
+ dev->irq = probe_irq_off(airqmask);
+
+ if ((int)dev->irq <= 0) {
+ arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n");
+ airqmask = probe_irq_on();
+ arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
+ udelay(5);
+ arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
+ dev->irq = probe_irq_off(airqmask);
+ if ((int)dev->irq <= 0) {
+ arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n");
+ err = -ENODEV;
+ goto out;
+ }
+ }
+ }
+
+ lp->card_name = "ISA COM20020";
+
+ err = com20020_found(dev, 0);
+ if (err != 0)
+ goto out;
+
+ return 0;
+
+out:
+ release_region(ioaddr, ARCNET_TOTAL_SIZE);
+ return err;
+}
+
+static int node = 0;
+static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
+static int irq = 0; /* or use the insmod io= irq= shmem= options */
+static char device[9]; /* use eg. device="arc1" to change name */
+static int timeout = 3;
+static int backplane = 0;
+static int clockp = 0;
+static int clockm = 0;
+
+module_param(node, int, 0);
+module_param_hw(io, int, ioport, 0);
+module_param_hw(irq, int, irq, 0);
+module_param_string(device, device, sizeof(device), 0);
+module_param(timeout, int, 0);
+module_param(backplane, int, 0);
+module_param(clockp, int, 0);
+module_param(clockm, int, 0);
+
+MODULE_LICENSE("GPL");
+
+static struct net_device *my_dev;
+
+static int __init com20020_init(void)
+{
+ struct net_device *dev;
+ struct arcnet_local *lp;
+
+ dev = alloc_arcdev(device);
+ if (!dev)
+ return -ENOMEM;
+
+ if (node && node != 0xff)
+ dev->dev_addr[0] = node;
+
+ dev->netdev_ops = &com20020_netdev_ops;
+
+ lp = netdev_priv(dev);
+ lp->backplane = backplane;
+ lp->clockp = clockp & 7;
+ lp->clockm = clockm & 3;
+ lp->timeout = timeout & 3;
+ lp->hw.owner = THIS_MODULE;
+
+ dev->base_addr = io;
+ dev->irq = irq;
+
+ if (dev->irq == 2)
+ dev->irq = 9;
+
+ if (com20020isa_probe(dev)) {
+ free_netdev(dev);
+ return -EIO;
+ }
+
+ my_dev = dev;
+ return 0;
+}
+
+static void __exit com20020_exit(void)
+{
+ unregister_netdev(my_dev);
+ free_irq(my_dev->irq, my_dev);
+ release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
+ free_netdev(my_dev);
+}
+
+#ifndef MODULE
+static int __init com20020isa_setup(char *s)
+{
+ int ints[8];
+
+ s = get_options(s, 8, ints);
+ if (!ints[0])
+ return 1;
+
+ switch (ints[0]) {
+ default: /* ERROR */
+ pr_info("Too many arguments\n");
+ case 6: /* Timeout */
+ timeout = ints[6];
+ case 5: /* CKP value */
+ clockp = ints[5];
+ case 4: /* Backplane flag */
+ backplane = ints[4];
+ case 3: /* Node ID */
+ node = ints[3];
+ case 2: /* IRQ */
+ irq = ints[2];
+ case 1: /* IO address */
+ io = ints[1];
+ }
+ if (*s)
+ snprintf(device, sizeof(device), "%s", s);
+ return 1;
+}
+
+__setup("com20020=", com20020isa_setup);
+
+#endif /* MODULE */
+
+module_init(com20020_init)
+module_exit(com20020_exit)
diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
new file mode 100644
index 0000000..eb7f767
--- /dev/null
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -0,0 +1,608 @@
+/*
+ * Linux ARCnet driver - COM20020 PCI support
+ * Contemporary Controls PCI20 and SOHARD SH-ARC PCI
+ *
+ * Written 1994-1999 by Avery Pennarun,
+ * based on an ISA version by David Woodhouse.
+ * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+
+#include "arcdevice.h"
+#include "com20020.h"
+
+/* Module parameters */
+
+static int node;
+static char device[9]; /* use eg. device="arc1" to change name */
+static int timeout = 3;
+static int backplane;
+static int clockp;
+static int clockm;
+
+module_param(node, int, 0);
+module_param_string(device, device, sizeof(device), 0);
+module_param(timeout, int, 0);
+module_param(backplane, int, 0);
+module_param(clockp, int, 0);
+module_param(clockm, int, 0);
+MODULE_LICENSE("GPL");
+
+static void led_tx_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct com20020_dev *card;
+ struct com20020_priv *priv;
+ struct com20020_pci_card_info *ci;
+
+ card = container_of(led_cdev, struct com20020_dev, tx_led);
+
+ priv = card->pci_priv;
+ ci = priv->ci;
+
+ outb(!!value, priv->misc + ci->leds[card->index].green);
+}
+
+static void led_recon_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct com20020_dev *card;
+ struct com20020_priv *priv;
+ struct com20020_pci_card_info *ci;
+
+ card = container_of(led_cdev, struct com20020_dev, recon_led);
+
+ priv = card->pci_priv;
+ ci = priv->ci;
+
+ outb(!!value, priv->misc + ci->leds[card->index].red);
+}
+
+static ssize_t backplane_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct net_device *net_dev = to_net_dev(dev);
+ struct arcnet_local *lp = netdev_priv(net_dev);
+
+ return sprintf(buf, "%s\n", lp->backplane ? "true" : "false");
+}
+static DEVICE_ATTR_RO(backplane_mode);
+
+static struct attribute *com20020_state_attrs[] = {
+ &dev_attr_backplane_mode.attr,
+ NULL,
+};
+
+static const struct attribute_group com20020_state_group = {
+ .name = NULL,
+ .attrs = com20020_state_attrs,
+};
+
+static void com20020pci_remove(struct pci_dev *pdev);
+
+static int com20020pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct com20020_pci_card_info *ci;
+ struct com20020_pci_channel_map *mm;
+ struct net_device *dev;
+ struct arcnet_local *lp;
+ struct com20020_priv *priv;
+ int i, ioaddr, ret;
+ struct resource *r;
+
+ if (pci_enable_device(pdev))
+ return -EIO;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct com20020_priv),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ ci = (struct com20020_pci_card_info *)id->driver_data;
+ priv->ci = ci;
+ mm = &ci->misc_map;
+
+ INIT_LIST_HEAD(&priv->list_dev);
+
+ if (mm->size) {
+ ioaddr = pci_resource_start(pdev, mm->bar) + mm->offset;
+ r = devm_request_region(&pdev->dev, ioaddr, mm->size,
+ "com20020-pci");
+ if (!r) {
+ pr_err("IO region %xh-%xh already allocated.\n",
+ ioaddr, ioaddr + mm->size - 1);
+ return -EBUSY;
+ }
+ priv->misc = ioaddr;
+ }
+
+ for (i = 0; i < ci->devcount; i++) {
+ struct com20020_pci_channel_map *cm = &ci->chan_map_tbl[i];
+ struct com20020_dev *card;
+ int dev_id_mask = 0xf;
+
+ dev = alloc_arcdev(device);
+ if (!dev) {
+ ret = -ENOMEM;
+ goto out_port;
+ }
+ dev->dev_port = i;
+
+ dev->netdev_ops = &com20020_netdev_ops;
+
+ lp = netdev_priv(dev);
+
+ arc_printk(D_NORMAL, dev, "%s Controls\n", ci->name);
+ ioaddr = pci_resource_start(pdev, cm->bar) + cm->offset;
+
+ r = devm_request_region(&pdev->dev, ioaddr, cm->size,
+ "com20020-pci");
+ if (!r) {
+ pr_err("IO region %xh-%xh already allocated\n",
+ ioaddr, ioaddr + cm->size - 1);
+ ret = -EBUSY;
+ goto out_port;
+ }
+
+ /* Dummy access after Reset
+ * ARCNET controller needs
+ * this access to detect bustype
+ */
+ arcnet_outb(0x00, ioaddr, COM20020_REG_W_COMMAND);
+ arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT);
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ dev->base_addr = ioaddr;
+ dev->dev_addr[0] = node;
+ dev->sysfs_groups[0] = &com20020_state_group;
+ dev->irq = pdev->irq;
+ lp->card_name = "PCI COM20020";
+ lp->card_flags = ci->flags;
+ lp->backplane = backplane;
+ lp->clockp = clockp & 7;
+ lp->clockm = clockm & 3;
+ lp->timeout = timeout;
+ lp->hw.owner = THIS_MODULE;
+
+ lp->backplane = (inb(priv->misc) >> (2 + i)) & 0x1;
+
+ if (!strncmp(ci->name, "EAE PLX-PCI FB2", 15))
+ lp->backplane = 1;
+
+ /* Get the dev_id from the PLX rotary coder */
+ if (!strncmp(ci->name, "EAE PLX-PCI MA1", 15))
+ dev_id_mask = 0x3;
+ dev->dev_id = (inb(priv->misc + ci->rotary) >> 4) & dev_id_mask;
+
+ snprintf(dev->name, sizeof(dev->name), "arc%d-%d", dev->dev_id, i);
+
+ if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
+ pr_err("IO address %Xh is empty!\n", ioaddr);
+ ret = -EIO;
+ goto out_port;
+ }
+ if (com20020_check(dev)) {
+ ret = -EIO;
+ goto out_port;
+ }
+
+ card = devm_kzalloc(&pdev->dev, sizeof(struct com20020_dev),
+ GFP_KERNEL);
+ if (!card) {
+ ret = -ENOMEM;
+ goto out_port;
+ }
+
+ card->index = i;
+ card->pci_priv = priv;
+ card->tx_led.brightness_set = led_tx_set;
+ card->tx_led.default_trigger = devm_kasprintf(&pdev->dev,
+ GFP_KERNEL, "arc%d-%d-tx",
+ dev->dev_id, i);
+ card->tx_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "pci:green:tx:%d-%d",
+ dev->dev_id, i);
+
+ card->tx_led.dev = &dev->dev;
+ card->recon_led.brightness_set = led_recon_set;
+ card->recon_led.default_trigger = devm_kasprintf(&pdev->dev,
+ GFP_KERNEL, "arc%d-%d-recon",
+ dev->dev_id, i);
+ card->recon_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "pci:red:recon:%d-%d",
+ dev->dev_id, i);
+ card->recon_led.dev = &dev->dev;
+ card->dev = dev;
+
+ ret = devm_led_classdev_register(&pdev->dev, &card->tx_led);
+ if (ret)
+ goto out_port;
+
+ ret = devm_led_classdev_register(&pdev->dev, &card->recon_led);
+ if (ret)
+ goto out_port;
+
+ dev_set_drvdata(&dev->dev, card);
+
+ ret = com20020_found(dev, IRQF_SHARED);
+ if (ret)
+ goto out_port;
+
+ devm_arcnet_led_init(dev, dev->dev_id, i);
+
+ list_add(&card->list, &priv->list_dev);
+ }
+
+ pci_set_drvdata(pdev, priv);
+
+ return 0;
+
+out_port:
+ com20020pci_remove(pdev);
+ return ret;
+}
+
+static void com20020pci_remove(struct pci_dev *pdev)
+{
+ struct com20020_dev *card, *tmpcard;
+ struct com20020_priv *priv;
+
+ priv = pci_get_drvdata(pdev);
+
+ list_for_each_entry_safe(card, tmpcard, &priv->list_dev, list) {
+ struct net_device *dev = card->dev;
+
+ unregister_netdev(dev);
+ free_irq(dev->irq, dev);
+ free_netdev(dev);
+ }
+}
+
+static struct com20020_pci_card_info card_info_10mbit = {
+ .name = "ARC-PCI",
+ .devcount = 1,
+ .chan_map_tbl = {
+ {
+ .bar = 2,
+ .offset = 0x00,
+ .size = 0x08,
+ },
+ },
+ .flags = ARC_CAN_10MBIT,
+};
+
+static struct com20020_pci_card_info card_info_5mbit = {
+ .name = "ARC-PCI",
+ .devcount = 1,
+ .chan_map_tbl = {
+ {
+ .bar = 2,
+ .offset = 0x00,
+ .size = 0x08,
+ },
+ },
+ .flags = ARC_IS_5MBIT,
+};
+
+static struct com20020_pci_card_info card_info_sohard = {
+ .name = "PLX-PCI",
+ .devcount = 1,
+ /* SOHARD needs PCI base addr 4 */
+ .chan_map_tbl = {
+ {
+ .bar = 4,
+ .offset = 0x00,
+ .size = 0x08
+ },
+ },
+ .flags = ARC_CAN_10MBIT,
+};
+
+static struct com20020_pci_card_info card_info_eae_arc1 = {
+ .name = "EAE PLX-PCI ARC1",
+ .devcount = 1,
+ .chan_map_tbl = {
+ {
+ .bar = 2,
+ .offset = 0x00,
+ .size = 0x08,
+ },
+ },
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .leds = {
+ {
+ .green = 0x0,
+ .red = 0x1,
+ },
+ },
+ .rotary = 0x0,
+ .flags = ARC_CAN_10MBIT,
+};
+
+static struct com20020_pci_card_info card_info_eae_ma1 = {
+ .name = "EAE PLX-PCI MA1",
+ .devcount = 2,
+ .chan_map_tbl = {
+ {
+ .bar = 2,
+ .offset = 0x00,
+ .size = 0x08,
+ }, {
+ .bar = 2,
+ .offset = 0x08,
+ .size = 0x08,
+ }
+ },
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .leds = {
+ {
+ .green = 0x0,
+ .red = 0x1,
+ }, {
+ .green = 0x2,
+ .red = 0x3,
+ },
+ },
+ .rotary = 0x0,
+ .flags = ARC_CAN_10MBIT,
+};
+
+static struct com20020_pci_card_info card_info_eae_fb2 = {
+ .name = "EAE PLX-PCI FB2",
+ .devcount = 1,
+ .chan_map_tbl = {
+ {
+ .bar = 2,
+ .offset = 0x00,
+ .size = 0x08,
+ },
+ },
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .leds = {
+ {
+ .green = 0x0,
+ .red = 0x1,
+ },
+ },
+ .rotary = 0x0,
+ .flags = ARC_CAN_10MBIT,
+};
+
+static const struct pci_device_id com20020pci_id_table[] = {
+ {
+ 0x1571, 0xa001,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0,
+ },
+ {
+ 0x1571, 0xa002,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0,
+ },
+ {
+ 0x1571, 0xa003,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0
+ },
+ {
+ 0x1571, 0xa004,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0,
+ },
+ {
+ 0x1571, 0xa005,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0
+ },
+ {
+ 0x1571, 0xa006,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0
+ },
+ {
+ 0x1571, 0xa007,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0
+ },
+ {
+ 0x1571, 0xa008,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ 0
+ },
+ {
+ 0x1571, 0xa009,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_5mbit
+ },
+ {
+ 0x1571, 0xa00a,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_5mbit
+ },
+ {
+ 0x1571, 0xa00b,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_5mbit
+ },
+ {
+ 0x1571, 0xa00c,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_5mbit
+ },
+ {
+ 0x1571, 0xa00d,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_5mbit
+ },
+ {
+ 0x1571, 0xa00e,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_5mbit
+ },
+ {
+ 0x1571, 0xa201,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x1571, 0xa202,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x1571, 0xa203,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x1571, 0xa204,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x1571, 0xa205,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x1571, 0xa206,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x10B5, 0x9030,
+ 0x10B5, 0x2978,
+ 0, 0,
+ (kernel_ulong_t)&card_info_sohard
+ },
+ {
+ 0x10B5, 0x9050,
+ 0x10B5, 0x2273,
+ 0, 0,
+ (kernel_ulong_t)&card_info_sohard
+ },
+ {
+ 0x10B5, 0x9050,
+ 0x10B5, 0x3263,
+ 0, 0,
+ (kernel_ulong_t)&card_info_eae_arc1
+ },
+ {
+ 0x10B5, 0x9050,
+ 0x10B5, 0x3292,
+ 0, 0,
+ (kernel_ulong_t)&card_info_eae_ma1
+ },
+ {
+ 0x10B5, 0x9050,
+ 0x10B5, 0x3294,
+ 0, 0,
+ (kernel_ulong_t)&card_info_eae_fb2
+ },
+ {
+ 0x14BA, 0x6000,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ {
+ 0x10B5, 0x2200,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&card_info_10mbit
+ },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, com20020pci_id_table);
+
+static struct pci_driver com20020pci_driver = {
+ .name = "com20020",
+ .id_table = com20020pci_id_table,
+ .probe = com20020pci_probe,
+ .remove = com20020pci_remove,
+};
+
+static int __init com20020pci_init(void)
+{
+ if (BUGLVL(D_NORMAL))
+ pr_info("%s\n", "COM20020 PCI support");
+ return pci_register_driver(&com20020pci_driver);
+}
+
+static void __exit com20020pci_cleanup(void)
+{
+ pci_unregister_driver(&com20020pci_driver);
+}
+
+module_init(com20020pci_init)
+module_exit(com20020pci_cleanup)
diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c
new file mode 100644
index 0000000..78043a9
--- /dev/null
+++ b/drivers/net/arcnet/com20020.c
@@ -0,0 +1,418 @@
+/*
+ * Linux ARCnet driver - COM20020 chipset support
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include "arcdevice.h"
+#include "com20020.h"
+
+static const char * const clockrates[] = {
+ "XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s",
+ "1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s",
+ "Reserved", "Reserved", "Reserved"
+};
+
+static void com20020_command(struct net_device *dev, int command);
+static int com20020_status(struct net_device *dev);
+static void com20020_setmask(struct net_device *dev, int mask);
+static int com20020_reset(struct net_device *dev, int really_reset);
+static void com20020_copy_to_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+static void com20020_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+static void com20020_set_mc_list(struct net_device *dev);
+static void com20020_close(struct net_device *);
+
+static void com20020_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
+
+ /* set up the address register */
+ arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag,
+ ioaddr, COM20020_REG_W_ADDR_HI);
+ arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
+
+ /* copy the data */
+ TIME(dev, "insb", count,
+ arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
+}
+
+static void com20020_copy_to_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
+
+ /* set up the address register */
+ arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI);
+ arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
+
+ /* copy the data */
+ TIME(dev, "outsb", count,
+ arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
+}
+
+/* Reset the card and check some basic stuff during the detection stage. */
+int com20020_check(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr, status;
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
+ udelay(5);
+ arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG);
+ mdelay(RESETtime);
+
+ lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
+ lp->setup2 = (lp->clockm << 4) | 8;
+
+ /* CHECK: should we do this for SOHARD cards ? */
+ /* Enable P1Mode for backplane mode */
+ lp->setup = lp->setup | P1MODE;
+
+ com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+ arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+
+ if (lp->clockm != 0) {
+ com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
+ arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
+
+ /* must now write the magic "restart operation" command */
+ mdelay(1);
+ arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
+ }
+
+ lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
+ /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG);
+
+ status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
+
+ if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
+ arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status);
+ return -ENODEV;
+ }
+ arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status);
+
+ arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
+ ioaddr, COM20020_REG_W_COMMAND);
+ status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
+ arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n",
+ status);
+
+ /* Read first location of memory */
+ arcnet_outb(0 | RDDATAflag | AUTOINCflag,
+ ioaddr, COM20020_REG_W_ADDR_HI);
+ arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO);
+
+ status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA);
+ if (status != TESTvalue) {
+ arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
+ status);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int com20020_set_hwaddr(struct net_device *dev, void *addr)
+{
+ int ioaddr = dev->base_addr;
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sockaddr *hwaddr = addr;
+
+ memcpy(dev->dev_addr, hwaddr->sa_data, 1);
+ com20020_set_subaddress(lp, ioaddr, SUB_NODE);
+ arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
+
+ return 0;
+}
+
+static int com20020_netdev_open(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ lp->config |= TXENcfg;
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+
+ return arcnet_open(dev);
+}
+
+static int com20020_netdev_close(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ arcnet_close(dev);
+
+ /* disable transmitter */
+ lp->config &= ~TXENcfg;
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ return 0;
+}
+
+const struct net_device_ops com20020_netdev_ops = {
+ .ndo_open = com20020_netdev_open,
+ .ndo_stop = com20020_netdev_close,
+ .ndo_start_xmit = arcnet_send_packet,
+ .ndo_tx_timeout = arcnet_timeout,
+ .ndo_set_mac_address = com20020_set_hwaddr,
+ .ndo_set_rx_mode = com20020_set_mc_list,
+};
+
+/* Set up the struct net_device associated with this card. Called after
+ * probing succeeds.
+ */
+int com20020_found(struct net_device *dev, int shared)
+{
+ struct arcnet_local *lp;
+ int ioaddr = dev->base_addr;
+
+ /* Initialize the rest of the device structure. */
+
+ lp = netdev_priv(dev);
+
+ lp->hw.owner = THIS_MODULE;
+ lp->hw.command = com20020_command;
+ lp->hw.status = com20020_status;
+ lp->hw.intmask = com20020_setmask;
+ lp->hw.reset = com20020_reset;
+ lp->hw.copy_to_card = com20020_copy_to_card;
+ lp->hw.copy_from_card = com20020_copy_from_card;
+ lp->hw.close = com20020_close;
+
+ /* FIXME: do this some other way! */
+ if (!dev->dev_addr[0])
+ dev->dev_addr[0] = arcnet_inb(ioaddr, 8);
+
+ com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+ arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+
+ if (lp->card_flags & ARC_CAN_10MBIT) {
+ com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
+ arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
+
+ /* must now write the magic "restart operation" command */
+ mdelay(1);
+ arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
+ }
+
+ lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
+ /* Default 0x38 + register: Node ID */
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
+
+ /* reserve the irq */
+ if (request_irq(dev->irq, arcnet_interrupt, shared,
+ "arcnet (COM20020)", dev)) {
+ arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
+ return -ENODEV;
+ }
+
+ arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
+ lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
+
+ if (lp->backplane)
+ arc_printk(D_NORMAL, dev, "Using backplane mode.\n");
+
+ if (lp->timeout != 3)
+ arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n",
+ lp->timeout);
+
+ arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n",
+ lp->setup >> 1,
+ clockrates[3 -
+ ((lp->setup2 & 0xF0) >> 4) +
+ ((lp->setup & 0x0F) >> 1)]);
+ /* The clockrates array index looks very fragile.
+ * It seems like it could have negative indexing.
+ */
+
+ if (register_netdev(dev)) {
+ free_irq(dev->irq, dev);
+ return -EIO;
+ }
+ return 0;
+}
+
+/* Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int com20020_reset(struct net_device *dev, int really_reset)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ u_int ioaddr = dev->base_addr;
+ u_char inbyte;
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
+ __FILE__, __LINE__, __func__, dev, lp, dev->name);
+ arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
+ dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ lp->config |= (lp->timeout << 3) | (lp->backplane << 2);
+ /* power-up defaults */
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+ if (really_reset) {
+ /* reset the card */
+ arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
+ udelay(5);
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ mdelay(RESETtime * 2);
+ /* COM20020 seems to be slower sometimes */
+ }
+ /* clear flags & end reset */
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
+ ioaddr, COM20020_REG_W_COMMAND);
+
+ /* verify that the ARCnet signature byte is present */
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+ com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+ if (inbyte != TESTvalue) {
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
+ __FILE__, __LINE__, __func__);
+ arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
+ return 1;
+ }
+ /* enable extended (512-byte) packets */
+ arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND);
+
+ arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
+
+ /* done! return success. */
+ return 0;
+}
+
+static void com20020_setmask(struct net_device *dev, int mask)
+{
+ u_int ioaddr = dev->base_addr;
+
+ arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr);
+ arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK);
+}
+
+static void com20020_command(struct net_device *dev, int cmd)
+{
+ u_int ioaddr = dev->base_addr;
+
+ arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND);
+}
+
+static int com20020_status(struct net_device *dev)
+{
+ u_int ioaddr = dev->base_addr;
+
+ return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) +
+ (arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8);
+}
+
+static void com20020_close(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+
+ /* disable transmitter */
+ lp->config &= ~TXENcfg;
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+}
+
+/* Set or clear the multicast filter for this adaptor.
+ * num_addrs == -1 Promiscuous mode, receive all packets
+ * num_addrs == 0 Normal mode, clear multicast list
+ * num_addrs > 0 Multicast mode, receive normal and MC packets, and do
+ * best-effort filtering.
+ * FIXME - do multicast stuff, not just promiscuous.
+ */
+static void com20020_set_mc_list(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+
+ if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {
+ /* Enable promiscuous mode */
+ if (!(lp->setup & PROMISCset))
+ arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n");
+ com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+ lp->setup |= PROMISCset;
+ arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+ } else {
+ /* Disable promiscuous mode, use normal mode */
+ if ((lp->setup & PROMISCset))
+ arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n");
+ com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
+ lp->setup &= ~PROMISCset;
+ arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
+ }
+}
+
+#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
+ defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
+ defined(CONFIG_ARCNET_COM20020_CS_MODULE)
+EXPORT_SYMBOL(com20020_check);
+EXPORT_SYMBOL(com20020_found);
+EXPORT_SYMBOL(com20020_netdev_ops);
+#endif
+
+MODULE_LICENSE("GPL");
+
+#ifdef MODULE
+
+static int __init com20020_module_init(void)
+{
+ if (BUGLVL(D_NORMAL))
+ pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)");
+ return 0;
+}
+
+static void __exit com20020_module_exit(void)
+{
+}
+module_init(com20020_module_init);
+module_exit(com20020_module_exit);
+#endif /* MODULE */
diff --git a/drivers/net/arcnet/com20020.h b/drivers/net/arcnet/com20020.h
new file mode 100644
index 0000000..0bcc5d0
--- /dev/null
+++ b/drivers/net/arcnet/com20020.h
@@ -0,0 +1,132 @@
+/*
+ * Linux ARCnet driver - COM20020 chipset support - function declarations
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+#ifndef __COM20020_H
+#define __COM20020_H
+#include <linux/leds.h>
+
+int com20020_check(struct net_device *dev);
+int com20020_found(struct net_device *dev, int shared);
+extern const struct net_device_ops com20020_netdev_ops;
+
+/* The number of low I/O ports used by the card. */
+#define ARCNET_TOTAL_SIZE 8
+
+#define PLX_PCI_MAX_CARDS 2
+
+struct ledoffsets {
+ int green;
+ int red;
+};
+
+struct com20020_pci_channel_map {
+ u32 bar;
+ u32 offset;
+ u32 size; /* 0x00 - auto, e.g. length of entire bar */
+};
+
+struct com20020_pci_card_info {
+ const char *name;
+ int devcount;
+
+ struct com20020_pci_channel_map chan_map_tbl[PLX_PCI_MAX_CARDS];
+ struct com20020_pci_channel_map misc_map;
+
+ struct ledoffsets leds[PLX_PCI_MAX_CARDS];
+ int rotary;
+
+ unsigned int flags;
+};
+
+struct com20020_priv {
+ struct com20020_pci_card_info *ci;
+ struct list_head list_dev;
+ resource_size_t misc;
+};
+
+struct com20020_dev {
+ struct list_head list;
+ struct net_device *dev;
+
+ struct led_classdev tx_led;
+ struct led_classdev recon_led;
+
+ struct com20020_priv *pci_priv;
+ int index;
+};
+
+#define COM20020_REG_W_INTMASK 0 /* writable */
+#define COM20020_REG_R_STATUS 0 /* readable */
+#define COM20020_REG_W_COMMAND 1 /* standard arcnet commands */
+#define COM20020_REG_R_DIAGSTAT 1 /* diagnostic status */
+#define COM20020_REG_W_ADDR_HI 2 /* control for IO-mapped memory */
+#define COM20020_REG_W_ADDR_LO 3
+#define COM20020_REG_RW_MEMDATA 4 /* data port for IO-mapped memory */
+#define COM20020_REG_W_SUBADR 5 /* the extended port _XREG refers to */
+#define COM20020_REG_W_CONFIG 6 /* configuration */
+#define COM20020_REG_W_XREG 7 /* extra
+ * (indexed by _CONFIG or _SUBADDR)
+ */
+
+/* in the ADDR_HI register */
+#define RDDATAflag 0x80 /* next access is a read (not a write) */
+
+/* in the DIAGSTAT register */
+#define NEWNXTIDflag 0x02 /* ID to which token is passed has changed */
+
+/* in the CONFIG register */
+#define RESETcfg 0x80 /* put card in reset state */
+#define TXENcfg 0x20 /* enable TX */
+#define XTOcfg(x) ((x) << 3) /* extended timeout */
+
+/* in SETUP register */
+#define PROMISCset 0x10 /* enable RCV_ALL */
+#define P1MODE 0x80 /* enable P1-MODE for Backplane */
+#define SLOWARB 0x01 /* enable Slow Arbitration for >=5Mbps */
+
+/* COM2002x */
+#define SUB_TENTATIVE 0 /* tentative node ID */
+#define SUB_NODE 1 /* node ID */
+#define SUB_SETUP1 2 /* various options */
+#define SUB_TEST 3 /* test/diag register */
+
+/* COM20022 only */
+#define SUB_SETUP2 4 /* sundry options */
+#define SUB_BUSCTL 5 /* bus control options */
+#define SUB_DMACOUNT 6 /* DMA count options */
+
+static inline void com20020_set_subaddress(struct arcnet_local *lp,
+ int ioaddr, int val)
+{
+ if (val < 4) {
+ lp->config = (lp->config & ~0x03) | val;
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ } else {
+ arcnet_outb(val, ioaddr, COM20020_REG_W_SUBADR);
+ }
+}
+
+#endif /* __COM20020_H */
diff --git a/drivers/net/arcnet/com20020_cs.c b/drivers/net/arcnet/com20020_cs.c
new file mode 100644
index 0000000..cf607ff
--- /dev/null
+++ b/drivers/net/arcnet/com20020_cs.c
@@ -0,0 +1,322 @@
+/*
+ * Linux ARCnet driver - COM20020 PCMCIA support
+ *
+ * Written 1994-1999 by Avery Pennarun,
+ * based on an ISA version by David Woodhouse.
+ * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
+ * which was derived from pcnet_cs.c by David Hinds.
+ * Some additional portions derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ * Changes:
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
+ * - reorganize kmallocs in com20020_attach, checking all for failure
+ * and releasing the previous allocations if one fails
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/io.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include "arcdevice.h"
+#include "com20020.h"
+
+static void regdump(struct net_device *dev)
+{
+#ifdef DEBUG
+ int ioaddr = dev->base_addr;
+ int count;
+
+ netdev_dbg(dev, "register dump:\n");
+ for (count = 0; count < 16; count++) {
+ if (!(count % 16))
+ pr_cont("%04X:", ioaddr + count);
+ pr_cont(" %02X", arcnet_inb(ioaddr, count));
+ }
+ pr_cont("\n");
+
+ netdev_dbg(dev, "buffer0 dump:\n");
+ /* set up the address register */
+ count = 0;
+ arcnet_outb((count >> 8) | RDDATAflag | AUTOINCflag,
+ ioaddr, com20020_REG_W_ADDR_HI);
+ arcnet_outb(count & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
+
+ for (count = 0; count < 256 + 32; count++) {
+ if (!(count % 16))
+ pr_cont("%04X:", count);
+
+ /* copy the data */
+ pr_cont(" %02X", arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA));
+ }
+ pr_cont("\n");
+#endif
+}
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+static int node;
+static int timeout = 3;
+static int backplane;
+static int clockp;
+static int clockm;
+
+module_param(node, int, 0);
+module_param(timeout, int, 0);
+module_param(backplane, int, 0);
+module_param(clockp, int, 0);
+module_param(clockm, int, 0);
+
+MODULE_LICENSE("GPL");
+
+/*====================================================================*/
+
+static int com20020_config(struct pcmcia_device *link);
+static void com20020_release(struct pcmcia_device *link);
+
+static void com20020_detach(struct pcmcia_device *p_dev);
+
+/*====================================================================*/
+
+static int com20020_probe(struct pcmcia_device *p_dev)
+{
+ struct com20020_dev *info;
+ struct net_device *dev;
+ struct arcnet_local *lp;
+
+ dev_dbg(&p_dev->dev, "com20020_attach()\n");
+
+ /* Create new network device */
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ goto fail_alloc_info;
+
+ dev = alloc_arcdev("");
+ if (!dev)
+ goto fail_alloc_dev;
+
+ lp = netdev_priv(dev);
+ lp->timeout = timeout;
+ lp->backplane = backplane;
+ lp->clockp = clockp;
+ lp->clockm = clockm & 3;
+ lp->hw.owner = THIS_MODULE;
+
+ /* fill in our module parameters as defaults */
+ dev->dev_addr[0] = node;
+
+ p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
+ p_dev->resource[0]->end = 16;
+ p_dev->config_flags |= CONF_ENABLE_IRQ;
+
+ info->dev = dev;
+ p_dev->priv = info;
+
+ return com20020_config(p_dev);
+
+fail_alloc_dev:
+ kfree(info);
+fail_alloc_info:
+ return -ENOMEM;
+} /* com20020_attach */
+
+static void com20020_detach(struct pcmcia_device *link)
+{
+ struct com20020_dev *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ dev_dbg(&link->dev, "detach...\n");
+
+ dev_dbg(&link->dev, "com20020_detach\n");
+
+ dev_dbg(&link->dev, "unregister...\n");
+
+ unregister_netdev(dev);
+
+ /* this is necessary because we register our IRQ separately
+ * from card services.
+ */
+ if (dev->irq)
+ free_irq(dev->irq, dev);
+
+ com20020_release(link);
+
+ /* Unlink device structure, free bits */
+ dev_dbg(&link->dev, "unlinking...\n");
+ if (link->priv) {
+ dev = info->dev;
+ if (dev) {
+ dev_dbg(&link->dev, "kfree...\n");
+ free_netdev(dev);
+ }
+ dev_dbg(&link->dev, "kfree2...\n");
+ kfree(info);
+ }
+
+} /* com20020_detach */
+
+static int com20020_config(struct pcmcia_device *link)
+{
+ struct arcnet_local *lp;
+ struct com20020_dev *info;
+ struct net_device *dev;
+ int i, ret;
+ int ioaddr;
+
+ info = link->priv;
+ dev = info->dev;
+
+ dev_dbg(&link->dev, "config...\n");
+
+ dev_dbg(&link->dev, "com20020_config\n");
+
+ dev_dbg(&link->dev, "baseport1 is %Xh\n",
+ (unsigned int)link->resource[0]->start);
+
+ i = -ENODEV;
+ link->io_lines = 16;
+
+ if (!link->resource[0]->start) {
+ for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10) {
+ link->resource[0]->start = ioaddr;
+ i = pcmcia_request_io(link);
+ if (i == 0)
+ break;
+ }
+ } else {
+ i = pcmcia_request_io(link);
+ }
+
+ if (i != 0) {
+ dev_dbg(&link->dev, "requestIO failed totally!\n");
+ goto failed;
+ }
+
+ ioaddr = dev->base_addr = link->resource[0]->start;
+ dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
+
+ dev_dbg(&link->dev, "request IRQ %d\n",
+ link->irq);
+ if (!link->irq) {
+ dev_dbg(&link->dev, "requestIRQ failed totally!\n");
+ goto failed;
+ }
+
+ dev->irq = link->irq;
+
+ ret = pcmcia_enable_device(link);
+ if (ret)
+ goto failed;
+
+ if (com20020_check(dev)) {
+ regdump(dev);
+ goto failed;
+ }
+
+ lp = netdev_priv(dev);
+ lp->card_name = "PCMCIA COM20020";
+ lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
+
+ SET_NETDEV_DEV(dev, &link->dev);
+
+ i = com20020_found(dev, 0); /* calls register_netdev */
+
+ if (i != 0) {
+ dev_notice(&link->dev,
+ "com20020_found() failed\n");
+ goto failed;
+ }
+
+ netdev_dbg(dev, "port %#3lx, irq %d\n",
+ dev->base_addr, dev->irq);
+ return 0;
+
+failed:
+ dev_dbg(&link->dev, "com20020_config failed...\n");
+ com20020_release(link);
+ return -ENODEV;
+} /* com20020_config */
+
+static void com20020_release(struct pcmcia_device *link)
+{
+ dev_dbg(&link->dev, "com20020_release\n");
+ pcmcia_disable_device(link);
+}
+
+static int com20020_suspend(struct pcmcia_device *link)
+{
+ struct com20020_dev *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ if (link->open)
+ netif_device_detach(dev);
+
+ return 0;
+}
+
+static int com20020_resume(struct pcmcia_device *link)
+{
+ struct com20020_dev *info = link->priv;
+ struct net_device *dev = info->dev;
+
+ if (link->open) {
+ int ioaddr = dev->base_addr;
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ arcnet_outb(lp->config | 0x80, ioaddr, COM20020_REG_W_CONFIG);
+ udelay(5);
+ arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
+ }
+
+ return 0;
+}
+
+static const struct pcmcia_device_id com20020_ids[] = {
+ PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
+ "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
+ PCMCIA_DEVICE_PROD_ID12("SoHard AG",
+ "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
+ PCMCIA_DEVICE_NULL
+};
+MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
+
+static struct pcmcia_driver com20020_cs_driver = {
+ .owner = THIS_MODULE,
+ .name = "com20020_cs",
+ .probe = com20020_probe,
+ .remove = com20020_detach,
+ .id_table = com20020_ids,
+ .suspend = com20020_suspend,
+ .resume = com20020_resume,
+};
+module_pcmcia_driver(com20020_cs_driver);
diff --git a/drivers/net/arcnet/com9026.h b/drivers/net/arcnet/com9026.h
new file mode 100644
index 0000000..6adbc18
--- /dev/null
+++ b/drivers/net/arcnet/com9026.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __COM9026_H
+#define __COM9026_H
+
+/* COM 9026 controller chip --> ARCnet register addresses */
+
+#define COM9026_REG_W_INTMASK 0 /* writable */
+#define COM9026_REG_R_STATUS 0 /* readable */
+#define COM9026_REG_W_COMMAND 1 /* writable, returns random vals on read (?) */
+#define COM9026_REG_RW_CONFIG 2 /* Configuration register */
+#define COM9026_REG_R_RESET 8 /* software reset (on read) */
+#define COM9026_REG_RW_MEMDATA 12 /* Data port for IO-mapped memory */
+#define COM9026_REG_W_ADDR_LO 14 /* Control registers for said */
+#define COM9026_REG_W_ADDR_HI 15
+
+#define COM9026_REG_R_STATION 1 /* Station ID */
+
+#endif
diff --git a/drivers/net/arcnet/com90io.c b/drivers/net/arcnet/com90io.c
new file mode 100644
index 0000000..4e56aaf
--- /dev/null
+++ b/drivers/net/arcnet/com90io.c
@@ -0,0 +1,424 @@
+/*
+ * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/bootmem.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include "arcdevice.h"
+#include "com9026.h"
+
+/* Internal function declarations */
+
+static int com90io_found(struct net_device *dev);
+static void com90io_command(struct net_device *dev, int command);
+static int com90io_status(struct net_device *dev);
+static void com90io_setmask(struct net_device *dev, int mask);
+static int com90io_reset(struct net_device *dev, int really_reset);
+static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
+ void *buf, int count);
+static void com90io_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+
+/* Handy defines for ARCnet specific stuff */
+
+/* The number of low I/O ports used by the card. */
+#define ARCNET_TOTAL_SIZE 16
+
+/****************************************************************************
+ * *
+ * IO-mapped operation routines *
+ * *
+ ****************************************************************************/
+
+#undef ONE_AT_A_TIME_TX
+#undef ONE_AT_A_TIME_RX
+
+static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
+{
+ int ioaddr = dev->base_addr;
+
+ arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
+ arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
+
+ return arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
+}
+
+#ifdef ONE_AT_A_TIME_TX
+static void put_buffer_byte(struct net_device *dev, unsigned offset,
+ u_char datum)
+{
+ int ioaddr = dev->base_addr;
+
+ arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
+ arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
+
+ arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
+}
+
+#endif
+
+static void get_whole_buffer(struct net_device *dev, unsigned offset,
+ unsigned length, char *dest)
+{
+ int ioaddr = dev->base_addr;
+
+ arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
+ arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
+
+ while (length--)
+#ifdef ONE_AT_A_TIME_RX
+ *(dest++) = get_buffer_byte(dev, offset++);
+#else
+ *(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
+#endif
+}
+
+static void put_whole_buffer(struct net_device *dev, unsigned offset,
+ unsigned length, char *dest)
+{
+ int ioaddr = dev->base_addr;
+
+ arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
+ arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);
+
+ while (length--)
+#ifdef ONE_AT_A_TIME_TX
+ put_buffer_byte(dev, offset++, *(dest++));
+#else
+ arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_MEMDATA);
+#endif
+}
+
+/* We cannot probe for an IO mapped card either, although we can check that
+ * it's where we were told it was, and even autoirq
+ */
+static int __init com90io_probe(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr, status;
+ unsigned long airqmask;
+
+ if (BUGLVL(D_NORMAL)) {
+ pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
+ pr_info("E-mail me if you actually test this driver, please!\n");
+ }
+
+ if (!ioaddr) {
+ arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
+ return -ENODEV;
+ }
+ if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
+ arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
+ ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
+ return -ENXIO;
+ }
+ if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
+ arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
+ ioaddr);
+ goto err_out;
+ }
+ arcnet_inb(ioaddr, COM9026_REG_R_RESET);
+ mdelay(RESETtime);
+
+ status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
+
+ if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
+ arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
+ status);
+ goto err_out;
+ }
+ arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
+
+ arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
+ ioaddr, COM9026_REG_W_COMMAND);
+
+ arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
+ status);
+
+ status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
+
+ if (status & RESETflag) {
+ arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
+ status);
+ goto err_out;
+ }
+ arcnet_outb((0x16 | IOMAPflag) & ~ENABLE16flag,
+ ioaddr, COM9026_REG_RW_CONFIG);
+
+ /* Read first loc'n of memory */
+
+ arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
+ arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO);
+
+ status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
+ if (status != 0xd1) {
+ arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
+ status);
+ goto err_out;
+ }
+ if (!dev->irq) {
+ /* if we do this, we're sure to get an IRQ since the
+ * card has just reset and the NORXflag is on until
+ * we tell it to start receiving.
+ */
+
+ airqmask = probe_irq_on();
+ arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
+ udelay(1);
+ arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
+ dev->irq = probe_irq_off(airqmask);
+
+ if ((int)dev->irq <= 0) {
+ arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
+ goto err_out;
+ }
+ }
+ release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
+ return com90io_found(dev);
+
+err_out:
+ release_region(ioaddr, ARCNET_TOTAL_SIZE);
+ return -ENODEV;
+}
+
+/* Set up the struct net_device associated with this card. Called after
+ * probing succeeds.
+ */
+static int __init com90io_found(struct net_device *dev)
+{
+ struct arcnet_local *lp;
+ int ioaddr = dev->base_addr;
+ int err;
+
+ /* Reserve the irq */
+ if (request_irq(dev->irq, arcnet_interrupt, 0,
+ "arcnet (COM90xx-IO)", dev)) {
+ arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
+ return -ENODEV;
+ }
+ /* Reserve the I/O region */
+ if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
+ "arcnet (COM90xx-IO)")) {
+ free_irq(dev->irq, dev);
+ return -EBUSY;
+ }
+
+ lp = netdev_priv(dev);
+ lp->card_name = "COM90xx I/O";
+ lp->hw.command = com90io_command;
+ lp->hw.status = com90io_status;
+ lp->hw.intmask = com90io_setmask;
+ lp->hw.reset = com90io_reset;
+ lp->hw.owner = THIS_MODULE;
+ lp->hw.copy_to_card = com90io_copy_to_card;
+ lp->hw.copy_from_card = com90io_copy_from_card;
+
+ lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
+ arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
+
+ /* get and check the station ID from offset 1 in shmem */
+
+ dev->dev_addr[0] = get_buffer_byte(dev, 1);
+
+ err = register_netdev(dev);
+ if (err) {
+ arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
+ ioaddr, COM9026_REG_RW_CONFIG);
+ free_irq(dev->irq, dev);
+ release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
+ return err;
+ }
+
+ arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
+ dev->dev_addr[0], dev->base_addr, dev->irq);
+
+ return 0;
+}
+
+/* Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int com90io_reset(struct net_device *dev, int really_reset)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ short ioaddr = dev->base_addr;
+
+ arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
+ dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
+
+ if (really_reset) {
+ /* reset the card */
+ arcnet_inb(ioaddr, COM9026_REG_R_RESET);
+ mdelay(RESETtime);
+ }
+ /* Set the thing to IO-mapped, 8-bit mode */
+ lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
+ arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
+
+ arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
+ /* clear flags & end reset */
+ arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
+
+ /* verify that the ARCnet signature byte is present */
+ if (get_buffer_byte(dev, 0) != TESTvalue) {
+ arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
+ return 1;
+ }
+ /* enable extended (512-byte) packets */
+ arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
+ /* done! return success. */
+ return 0;
+}
+
+static void com90io_command(struct net_device *dev, int cmd)
+{
+ short ioaddr = dev->base_addr;
+
+ arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
+}
+
+static int com90io_status(struct net_device *dev)
+{
+ short ioaddr = dev->base_addr;
+
+ return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
+}
+
+static void com90io_setmask(struct net_device *dev, int mask)
+{
+ short ioaddr = dev->base_addr;
+
+ arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
+}
+
+static void com90io_copy_to_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ TIME(dev, "put_whole_buffer", count,
+ put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
+}
+
+static void com90io_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ TIME(dev, "get_whole_buffer", count,
+ get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
+}
+
+static int io; /* use the insmod io= irq= shmem= options */
+static int irq;
+static char device[9]; /* use eg. device=arc1 to change name */
+
+module_param_hw(io, int, ioport, 0);
+module_param_hw(irq, int, irq, 0);
+module_param_string(device, device, sizeof(device), 0);
+MODULE_LICENSE("GPL");
+
+#ifndef MODULE
+static int __init com90io_setup(char *s)
+{
+ int ints[4];
+
+ s = get_options(s, 4, ints);
+ if (!ints[0])
+ return 0;
+ switch (ints[0]) {
+ default: /* ERROR */
+ pr_err("Too many arguments\n");
+ case 2: /* IRQ */
+ irq = ints[2];
+ case 1: /* IO address */
+ io = ints[1];
+ }
+ if (*s)
+ snprintf(device, sizeof(device), "%s", s);
+ return 1;
+}
+__setup("com90io=", com90io_setup);
+#endif
+
+static struct net_device *my_dev;
+
+static int __init com90io_init(void)
+{
+ struct net_device *dev;
+ int err;
+
+ dev = alloc_arcdev(device);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->base_addr = io;
+ dev->irq = irq;
+ if (dev->irq == 2)
+ dev->irq = 9;
+
+ err = com90io_probe(dev);
+
+ if (err) {
+ free_netdev(dev);
+ return err;
+ }
+
+ my_dev = dev;
+ return 0;
+}
+
+static void __exit com90io_exit(void)
+{
+ struct net_device *dev = my_dev;
+ int ioaddr = dev->base_addr;
+
+ unregister_netdev(dev);
+
+ /* In case the old driver is loaded later,
+ * set the thing back to MMAP mode
+ */
+ arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
+ ioaddr, COM9026_REG_RW_CONFIG);
+
+ free_irq(dev->irq, dev);
+ release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
+ free_netdev(dev);
+}
+
+module_init(com90io_init)
+module_exit(com90io_exit)
diff --git a/drivers/net/arcnet/com90xx.c b/drivers/net/arcnet/com90xx.c
new file mode 100644
index 0000000..ca4a57c
--- /dev/null
+++ b/drivers/net/arcnet/com90xx.c
@@ -0,0 +1,711 @@
+/*
+ * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)
+ *
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include "arcdevice.h"
+#include "com9026.h"
+
+/* Define this to speed up the autoprobe by assuming if only one io port and
+ * shmem are left in the list at Stage 5, they must correspond to each
+ * other.
+ *
+ * This is undefined by default because it might not always be true, and the
+ * extra check makes the autoprobe even more careful. Speed demons can turn
+ * it on - I think it should be fine if you only have one ARCnet card
+ * installed.
+ *
+ * If no ARCnet cards are installed, this delay never happens anyway and thus
+ * the option has no effect.
+ */
+#undef FAST_PROBE
+
+/* Internal function declarations */
+static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
+static void com90xx_command(struct net_device *dev, int command);
+static int com90xx_status(struct net_device *dev);
+static void com90xx_setmask(struct net_device *dev, int mask);
+static int com90xx_reset(struct net_device *dev, int really_reset);
+static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
+ void *buf, int count);
+static void com90xx_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+
+/* Known ARCnet cards */
+
+static struct net_device *cards[16];
+static int numcards;
+
+/* Handy defines for ARCnet specific stuff */
+
+/* The number of low I/O ports used by the card */
+#define ARCNET_TOTAL_SIZE 16
+
+/* Amount of I/O memory used by the card */
+#define BUFFER_SIZE (512)
+#define MIRROR_SIZE (BUFFER_SIZE * 4)
+
+static int com90xx_skip_probe __initdata = 0;
+
+/* Module parameters */
+
+static int io; /* use the insmod io= irq= shmem= options */
+static int irq;
+static int shmem;
+static char device[9]; /* use eg. device=arc1 to change name */
+
+module_param_hw(io, int, ioport, 0);
+module_param_hw(irq, int, irq, 0);
+module_param(shmem, int, 0);
+module_param_string(device, device, sizeof(device), 0);
+
+static void __init com90xx_probe(void)
+{
+ int count, status, ioaddr, numprint, airq, openparen = 0;
+ unsigned long airqmask;
+ int ports[(0x3f0 - 0x200) / 16 + 1] = { 0 };
+ unsigned long *shmems;
+ void __iomem **iomem;
+ int numports, numshmems, *port;
+ u_long *p;
+ int index;
+
+ if (!io && !irq && !shmem && !*device && com90xx_skip_probe)
+ return;
+
+ shmems = kzalloc(((0x100000 - 0xa0000) / 0x800) * sizeof(unsigned long),
+ GFP_KERNEL);
+ if (!shmems)
+ return;
+ iomem = kzalloc(((0x100000 - 0xa0000) / 0x800) * sizeof(void __iomem *),
+ GFP_KERNEL);
+ if (!iomem) {
+ kfree(shmems);
+ return;
+ }
+
+ if (BUGLVL(D_NORMAL))
+ pr_info("%s\n", "COM90xx chipset support");
+
+ /* set up the arrays where we'll store the possible probe addresses */
+ numports = numshmems = 0;
+ if (io)
+ ports[numports++] = io;
+ else
+ for (count = 0x200; count <= 0x3f0; count += 16)
+ ports[numports++] = count;
+ if (shmem)
+ shmems[numshmems++] = shmem;
+ else
+ for (count = 0xA0000; count <= 0xFF800; count += 2048)
+ shmems[numshmems++] = count;
+
+ /* Stage 1: abandon any reserved ports, or ones with status==0xFF
+ * (empty), and reset any others by reading the reset port.
+ */
+ numprint = -1;
+ for (port = &ports[0]; port - ports < numports; port++) {
+ numprint++;
+ numprint %= 8;
+ if (!numprint) {
+ arc_cont(D_INIT, "\n");
+ arc_cont(D_INIT, "S1: ");
+ }
+ arc_cont(D_INIT, "%Xh ", *port);
+
+ ioaddr = *port;
+
+ if (!request_region(*port, ARCNET_TOTAL_SIZE,
+ "arcnet (90xx)")) {
+ arc_cont(D_INIT_REASONS, "(request_region)\n");
+ arc_cont(D_INIT_REASONS, "S1: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ *port-- = ports[--numports];
+ continue;
+ }
+ if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
+ arc_cont(D_INIT_REASONS, "(empty)\n");
+ arc_cont(D_INIT_REASONS, "S1: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ release_region(*port, ARCNET_TOTAL_SIZE);
+ *port-- = ports[--numports];
+ continue;
+ }
+ /* begin resetting card */
+ arcnet_inb(ioaddr, COM9026_REG_R_RESET);
+
+ arc_cont(D_INIT_REASONS, "\n");
+ arc_cont(D_INIT_REASONS, "S1: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ }
+ arc_cont(D_INIT, "\n");
+
+ if (!numports) {
+ arc_cont(D_NORMAL, "S1: No ARCnet cards found.\n");
+ kfree(shmems);
+ kfree(iomem);
+ return;
+ }
+ /* Stage 2: we have now reset any possible ARCnet cards, so we can't
+ * do anything until they finish. If D_INIT, print the list of
+ * cards that are left.
+ */
+ numprint = -1;
+ for (port = &ports[0]; port < ports + numports; port++) {
+ numprint++;
+ numprint %= 8;
+ if (!numprint) {
+ arc_cont(D_INIT, "\n");
+ arc_cont(D_INIT, "S2: ");
+ }
+ arc_cont(D_INIT, "%Xh ", *port);
+ }
+ arc_cont(D_INIT, "\n");
+ mdelay(RESETtime);
+
+ /* Stage 3: abandon any shmem addresses that don't have the signature
+ * 0xD1 byte in the right place, or are read-only.
+ */
+ numprint = -1;
+ for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) {
+ void __iomem *base;
+
+ numprint++;
+ numprint %= 8;
+ if (!numprint) {
+ arc_cont(D_INIT, "\n");
+ arc_cont(D_INIT, "S3: ");
+ }
+ arc_cont(D_INIT, "%lXh ", *p);
+
+ if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) {
+ arc_cont(D_INIT_REASONS, "(request_mem_region)\n");
+ arc_cont(D_INIT_REASONS, "Stage 3: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ goto out;
+ }
+ base = ioremap(*p, MIRROR_SIZE);
+ if (!base) {
+ arc_cont(D_INIT_REASONS, "(ioremap)\n");
+ arc_cont(D_INIT_REASONS, "Stage 3: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ goto out1;
+ }
+ if (arcnet_readb(base, COM9026_REG_R_STATUS) != TESTvalue) {
+ arc_cont(D_INIT_REASONS, "(%02Xh != %02Xh)\n",
+ arcnet_readb(base, COM9026_REG_R_STATUS),
+ TESTvalue);
+ arc_cont(D_INIT_REASONS, "S3: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ goto out2;
+ }
+ /* By writing 0x42 to the TESTvalue location, we also make
+ * sure no "mirror" shmem areas show up - if they occur
+ * in another pass through this loop, they will be discarded
+ * because *cptr != TESTvalue.
+ */
+ arcnet_writeb(0x42, base, COM9026_REG_W_INTMASK);
+ if (arcnet_readb(base, COM9026_REG_R_STATUS) != 0x42) {
+ arc_cont(D_INIT_REASONS, "(read only)\n");
+ arc_cont(D_INIT_REASONS, "S3: ");
+ goto out2;
+ }
+ arc_cont(D_INIT_REASONS, "\n");
+ arc_cont(D_INIT_REASONS, "S3: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ iomem[index] = base;
+ continue;
+ out2:
+ iounmap(base);
+ out1:
+ release_mem_region(*p, MIRROR_SIZE);
+ out:
+ *p-- = shmems[--numshmems];
+ index--;
+ }
+ arc_cont(D_INIT, "\n");
+
+ if (!numshmems) {
+ arc_cont(D_NORMAL, "S3: No ARCnet cards found.\n");
+ for (port = &ports[0]; port < ports + numports; port++)
+ release_region(*port, ARCNET_TOTAL_SIZE);
+ kfree(shmems);
+ kfree(iomem);
+ return;
+ }
+ /* Stage 4: something of a dummy, to report the shmems that are
+ * still possible after stage 3.
+ */
+ numprint = -1;
+ for (p = &shmems[0]; p < shmems + numshmems; p++) {
+ numprint++;
+ numprint %= 8;
+ if (!numprint) {
+ arc_cont(D_INIT, "\n");
+ arc_cont(D_INIT, "S4: ");
+ }
+ arc_cont(D_INIT, "%lXh ", *p);
+ }
+ arc_cont(D_INIT, "\n");
+
+ /* Stage 5: for any ports that have the correct status, can disable
+ * the RESET flag, and (if no irq is given) generate an autoirq,
+ * register an ARCnet device.
+ *
+ * Currently, we can only register one device per probe, so quit
+ * after the first one is found.
+ */
+ numprint = -1;
+ for (port = &ports[0]; port < ports + numports; port++) {
+ int found = 0;
+
+ numprint++;
+ numprint %= 8;
+ if (!numprint) {
+ arc_cont(D_INIT, "\n");
+ arc_cont(D_INIT, "S5: ");
+ }
+ arc_cont(D_INIT, "%Xh ", *port);
+
+ ioaddr = *port;
+ status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
+
+ if ((status & 0x9D)
+ != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
+ arc_cont(D_INIT_REASONS, "(status=%Xh)\n", status);
+ arc_cont(D_INIT_REASONS, "S5: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ release_region(*port, ARCNET_TOTAL_SIZE);
+ *port-- = ports[--numports];
+ continue;
+ }
+ arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
+ ioaddr, COM9026_REG_W_COMMAND);
+ status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
+ if (status & RESETflag) {
+ arc_cont(D_INIT_REASONS, " (eternal reset, status=%Xh)\n",
+ status);
+ arc_cont(D_INIT_REASONS, "S5: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ release_region(*port, ARCNET_TOTAL_SIZE);
+ *port-- = ports[--numports];
+ continue;
+ }
+ /* skip this completely if an IRQ was given, because maybe
+ * we're on a machine that locks during autoirq!
+ */
+ if (!irq) {
+ /* if we do this, we're sure to get an IRQ since the
+ * card has just reset and the NORXflag is on until
+ * we tell it to start receiving.
+ */
+ airqmask = probe_irq_on();
+ arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
+ udelay(1);
+ arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
+ airq = probe_irq_off(airqmask);
+
+ if (airq <= 0) {
+ arc_cont(D_INIT_REASONS, "(airq=%d)\n", airq);
+ arc_cont(D_INIT_REASONS, "S5: ");
+ if (BUGLVL(D_INIT_REASONS))
+ numprint = 0;
+ release_region(*port, ARCNET_TOTAL_SIZE);
+ *port-- = ports[--numports];
+ continue;
+ }
+ } else {
+ airq = irq;
+ }
+
+ arc_cont(D_INIT, "(%d,", airq);
+ openparen = 1;
+
+ /* Everything seems okay. But which shmem, if any, puts
+ * back its signature byte when the card is reset?
+ *
+ * If there are multiple cards installed, there might be
+ * multiple shmems still in the list.
+ */
+#ifdef FAST_PROBE
+ if (numports > 1 || numshmems > 1) {
+ arcnet_inb(ioaddr, COM9026_REG_R_RESET);
+ mdelay(RESETtime);
+ } else {
+ /* just one shmem and port, assume they match */
+ arcnet_writeb(TESTvalue, iomem[0],
+ COM9026_REG_W_INTMASK);
+ }
+#else
+ arcnet_inb(ioaddr, COM9026_REG_R_RESET);
+ mdelay(RESETtime);
+#endif
+
+ for (index = 0; index < numshmems; index++) {
+ u_long ptr = shmems[index];
+ void __iomem *base = iomem[index];
+
+ if (arcnet_readb(base, COM9026_REG_R_STATUS) == TESTvalue) { /* found one */
+ arc_cont(D_INIT, "%lXh)\n", *p);
+ openparen = 0;
+
+ /* register the card */
+ if (com90xx_found(*port, airq, ptr, base) == 0)
+ found = 1;
+ numprint = -1;
+
+ /* remove shmem from the list */
+ shmems[index] = shmems[--numshmems];
+ iomem[index] = iomem[numshmems];
+ break; /* go to the next I/O port */
+ } else {
+ arc_cont(D_INIT_REASONS, "%Xh-",
+ arcnet_readb(base, COM9026_REG_R_STATUS));
+ }
+ }
+
+ if (openparen) {
+ if (BUGLVL(D_INIT))
+ pr_cont("no matching shmem)\n");
+ if (BUGLVL(D_INIT_REASONS)) {
+ pr_cont("S5: ");
+ numprint = 0;
+ }
+ }
+ if (!found)
+ release_region(*port, ARCNET_TOTAL_SIZE);
+ *port-- = ports[--numports];
+ }
+
+ if (BUGLVL(D_INIT_REASONS))
+ pr_cont("\n");
+
+ /* Now put back TESTvalue on all leftover shmems. */
+ for (index = 0; index < numshmems; index++) {
+ arcnet_writeb(TESTvalue, iomem[index], COM9026_REG_W_INTMASK);
+ iounmap(iomem[index]);
+ release_mem_region(shmems[index], MIRROR_SIZE);
+ }
+ kfree(shmems);
+ kfree(iomem);
+}
+
+static int __init check_mirror(unsigned long addr, size_t size)
+{
+ void __iomem *p;
+ int res = -1;
+
+ if (!request_mem_region(addr, size, "arcnet (90xx)"))
+ return -1;
+
+ p = ioremap(addr, size);
+ if (p) {
+ if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue)
+ res = 1;
+ else
+ res = 0;
+ iounmap(p);
+ }
+
+ release_mem_region(addr, size);
+ return res;
+}
+
+/* Set up the struct net_device associated with this card. Called after
+ * probing succeeds.
+ */
+static int __init com90xx_found(int ioaddr, int airq, u_long shmem,
+ void __iomem *p)
+{
+ struct net_device *dev = NULL;
+ struct arcnet_local *lp;
+ u_long first_mirror, last_mirror;
+ int mirror_size;
+
+ /* allocate struct net_device */
+ dev = alloc_arcdev(device);
+ if (!dev) {
+ arc_cont(D_NORMAL, "com90xx: Can't allocate device!\n");
+ iounmap(p);
+ release_mem_region(shmem, MIRROR_SIZE);
+ return -ENOMEM;
+ }
+ lp = netdev_priv(dev);
+ /* find the real shared memory start/end points, including mirrors */
+
+ /* guess the actual size of one "memory mirror" - the number of
+ * bytes between copies of the shared memory. On most cards, it's
+ * 2k (or there are no mirrors at all) but on some, it's 4k.
+ */
+ mirror_size = MIRROR_SIZE;
+ if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue &&
+ check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
+ check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
+ mirror_size = 2 * MIRROR_SIZE;
+
+ first_mirror = shmem - mirror_size;
+ while (check_mirror(first_mirror, mirror_size) == 1)
+ first_mirror -= mirror_size;
+ first_mirror += mirror_size;
+
+ last_mirror = shmem + mirror_size;
+ while (check_mirror(last_mirror, mirror_size) == 1)
+ last_mirror += mirror_size;
+ last_mirror -= mirror_size;
+
+ dev->mem_start = first_mirror;
+ dev->mem_end = last_mirror + MIRROR_SIZE - 1;
+
+ iounmap(p);
+ release_mem_region(shmem, MIRROR_SIZE);
+
+ if (!request_mem_region(dev->mem_start,
+ dev->mem_end - dev->mem_start + 1,
+ "arcnet (90xx)"))
+ goto err_free_dev;
+
+ /* reserve the irq */
+ if (request_irq(airq, arcnet_interrupt, 0, "arcnet (90xx)", dev)) {
+ arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", airq);
+ goto err_release_mem;
+ }
+ dev->irq = airq;
+
+ /* Initialize the rest of the device structure. */
+ lp->card_name = "COM90xx";
+ lp->hw.command = com90xx_command;
+ lp->hw.status = com90xx_status;
+ lp->hw.intmask = com90xx_setmask;
+ lp->hw.reset = com90xx_reset;
+ lp->hw.owner = THIS_MODULE;
+ lp->hw.copy_to_card = com90xx_copy_to_card;
+ lp->hw.copy_from_card = com90xx_copy_from_card;
+ lp->mem_start = ioremap(dev->mem_start,
+ dev->mem_end - dev->mem_start + 1);
+ if (!lp->mem_start) {
+ arc_printk(D_NORMAL, dev, "Can't remap device memory!\n");
+ goto err_free_irq;
+ }
+
+ /* get and check the station ID from offset 1 in shmem */
+ dev->dev_addr[0] = arcnet_readb(lp->mem_start, COM9026_REG_R_STATION);
+
+ dev->base_addr = ioaddr;
+
+ arc_printk(D_NORMAL, dev, "COM90xx station %02Xh found at %03lXh, IRQ %d, ShMem %lXh (%ld*%xh).\n",
+ dev->dev_addr[0],
+ dev->base_addr, dev->irq, dev->mem_start,
+ (dev->mem_end - dev->mem_start + 1) / mirror_size,
+ mirror_size);
+
+ if (register_netdev(dev))
+ goto err_unmap;
+
+ cards[numcards++] = dev;
+ return 0;
+
+err_unmap:
+ iounmap(lp->mem_start);
+err_free_irq:
+ free_irq(dev->irq, dev);
+err_release_mem:
+ release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
+err_free_dev:
+ free_netdev(dev);
+ return -EIO;
+}
+
+static void com90xx_command(struct net_device *dev, int cmd)
+{
+ short ioaddr = dev->base_addr;
+
+ arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
+}
+
+static int com90xx_status(struct net_device *dev)
+{
+ short ioaddr = dev->base_addr;
+
+ return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
+}
+
+static void com90xx_setmask(struct net_device *dev, int mask)
+{
+ short ioaddr = dev->base_addr;
+
+ arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
+}
+
+/* Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int com90xx_reset(struct net_device *dev, int really_reset)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ short ioaddr = dev->base_addr;
+
+ arc_printk(D_INIT, dev, "Resetting (status=%02Xh)\n",
+ arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
+
+ if (really_reset) {
+ /* reset the card */
+ arcnet_inb(ioaddr, COM9026_REG_R_RESET);
+ mdelay(RESETtime);
+ }
+ /* clear flags & end reset */
+ arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
+ arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
+
+#if 0
+ /* don't do this until we verify that it doesn't hurt older cards! */
+ arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) | ENABLE16flag,
+ ioaddr, COM9026_REG_RW_CONFIG);
+#endif
+
+ /* verify that the ARCnet signature byte is present */
+ if (arcnet_readb(lp->mem_start, COM9026_REG_R_STATUS) != TESTvalue) {
+ if (really_reset)
+ arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
+ return 1;
+ }
+ /* enable extended (512-byte) packets */
+ arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
+
+ /* clean out all the memory to make debugging make more sense :) */
+ if (BUGLVL(D_DURING))
+ memset_io(lp->mem_start, 0x42, 2048);
+
+ /* done! return success. */
+ return 0;
+}
+
+static void com90xx_copy_to_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
+
+ TIME(dev, "memcpy_toio", count, memcpy_toio(memaddr, buf, count));
+}
+
+static void com90xx_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
+
+ TIME(dev, "memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
+}
+
+MODULE_LICENSE("GPL");
+
+static int __init com90xx_init(void)
+{
+ if (irq == 2)
+ irq = 9;
+ com90xx_probe();
+ if (!numcards)
+ return -EIO;
+ return 0;
+}
+
+static void __exit com90xx_exit(void)
+{
+ struct net_device *dev;
+ struct arcnet_local *lp;
+ int count;
+
+ for (count = 0; count < numcards; count++) {
+ dev = cards[count];
+ lp = netdev_priv(dev);
+
+ unregister_netdev(dev);
+ free_irq(dev->irq, dev);
+ iounmap(lp->mem_start);
+ release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
+ release_mem_region(dev->mem_start,
+ dev->mem_end - dev->mem_start + 1);
+ free_netdev(dev);
+ }
+}
+
+module_init(com90xx_init);
+module_exit(com90xx_exit);
+
+#ifndef MODULE
+static int __init com90xx_setup(char *s)
+{
+ int ints[8];
+
+ s = get_options(s, 8, ints);
+ if (!ints[0] && !*s) {
+ pr_notice("Disabled\n");
+ return 1;
+ }
+
+ switch (ints[0]) {
+ default: /* ERROR */
+ pr_err("Too many arguments\n");
+ case 3: /* Mem address */
+ shmem = ints[3];
+ case 2: /* IRQ */
+ irq = ints[2];
+ case 1: /* IO address */
+ io = ints[1];
+ }
+
+ if (*s)
+ snprintf(device, sizeof(device), "%s", s);
+
+ return 1;
+}
+
+__setup("com90xx=", com90xx_setup);
+#endif
diff --git a/drivers/net/arcnet/rfc1051.c b/drivers/net/arcnet/rfc1051.c
new file mode 100644
index 0000000..a7752a5
--- /dev/null
+++ b/drivers/net/arcnet/rfc1051.c
@@ -0,0 +1,242 @@
+/*
+ * Linux ARCnet driver - RFC1051 ("simple" standard) packet encapsulation
+ *
+ * Written 1994-1999 by Avery Pennarun.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+#include "arcdevice.h"
+
+static __be16 type_trans(struct sk_buff *skb, struct net_device *dev);
+static void rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length);
+static int build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr);
+static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
+ int bufnum);
+
+static struct ArcProto rfc1051_proto = {
+ .suffix = 's',
+ .mtu = XMTU - RFC1051_HDR_SIZE,
+ .is_ip = 1,
+ .rx = rx,
+ .build_header = build_header,
+ .prepare_tx = prepare_tx,
+ .continue_tx = NULL,
+ .ack_tx = NULL
+};
+
+static int __init arcnet_rfc1051_init(void)
+{
+ pr_info("%s\n", "RFC1051 \"simple standard\" (`s') encapsulation support loaded");
+
+ arc_proto_map[ARC_P_IP_RFC1051]
+ = arc_proto_map[ARC_P_ARP_RFC1051]
+ = &rfc1051_proto;
+
+ /* if someone else already owns the broadcast, we won't take it */
+ if (arc_bcast_proto == arc_proto_default)
+ arc_bcast_proto = &rfc1051_proto;
+
+ return 0;
+}
+
+static void __exit arcnet_rfc1051_exit(void)
+{
+ arcnet_unregister_proto(&rfc1051_proto);
+}
+
+module_init(arcnet_rfc1051_init);
+module_exit(arcnet_rfc1051_exit);
+
+MODULE_LICENSE("GPL");
+
+/* Determine a packet's protocol ID.
+ *
+ * With ARCnet we have to convert everything to Ethernet-style stuff.
+ */
+static __be16 type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct archdr *pkt = (struct archdr *)skb->data;
+ struct arc_rfc1051 *soft = &pkt->soft.rfc1051;
+ int hdr_size = ARC_HDR_SIZE + RFC1051_HDR_SIZE;
+
+ /* Pull off the arcnet header. */
+ skb_reset_mac_header(skb);
+ skb_pull(skb, hdr_size);
+
+ if (pkt->hard.dest == 0) {
+ skb->pkt_type = PACKET_BROADCAST;
+ } else if (dev->flags & IFF_PROMISC) {
+ /* if we're not sending to ourselves :) */
+ if (pkt->hard.dest != dev->dev_addr[0])
+ skb->pkt_type = PACKET_OTHERHOST;
+ }
+ /* now return the protocol number */
+ switch (soft->proto) {
+ case ARC_P_IP_RFC1051:
+ return htons(ETH_P_IP);
+ case ARC_P_ARP_RFC1051:
+ return htons(ETH_P_ARP);
+
+ default:
+ dev->stats.rx_errors++;
+ dev->stats.rx_crc_errors++;
+ return 0;
+ }
+
+ return htons(ETH_P_IP);
+}
+
+/* packet receiver */
+static void rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sk_buff *skb;
+ struct archdr *pkt = pkthdr;
+ int ofs;
+
+ arc_printk(D_DURING, dev, "it's a raw packet (length=%d)\n", length);
+
+ if (length >= MinTU)
+ ofs = 512 - length;
+ else
+ ofs = 256 - length;
+
+ skb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb_put(skb, length + ARC_HDR_SIZE);
+ skb->dev = dev;
+
+ pkt = (struct archdr *)skb->data;
+
+ /* up to sizeof(pkt->soft) has already been copied from the card */
+ memcpy(pkt, pkthdr, sizeof(struct archdr));
+ if (length > sizeof(pkt->soft))
+ lp->hw.copy_from_card(dev, bufnum, ofs + sizeof(pkt->soft),
+ pkt->soft.raw + sizeof(pkt->soft),
+ length - sizeof(pkt->soft));
+
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "rx");
+
+ skb->protocol = type_trans(skb, dev);
+ netif_rx(skb);
+}
+
+/* Create the ARCnet hard/soft headers for RFC1051 */
+static int build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr)
+{
+ int hdr_size = ARC_HDR_SIZE + RFC1051_HDR_SIZE;
+ struct archdr *pkt = skb_push(skb, hdr_size);
+ struct arc_rfc1051 *soft = &pkt->soft.rfc1051;
+
+ /* set the protocol ID according to RFC1051 */
+ switch (type) {
+ case ETH_P_IP:
+ soft->proto = ARC_P_IP_RFC1051;
+ break;
+ case ETH_P_ARP:
+ soft->proto = ARC_P_ARP_RFC1051;
+ break;
+ default:
+ arc_printk(D_NORMAL, dev, "RFC1051: I don't understand protocol %d (%Xh)\n",
+ type, type);
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+ return 0;
+ }
+
+ /* Set the source hardware address.
+ *
+ * This is pretty pointless for most purposes, but it can help in
+ * debugging. ARCnet does not allow us to change the source address
+ * in the actual packet sent.
+ */
+ pkt->hard.source = *dev->dev_addr;
+
+ /* see linux/net/ethernet/eth.c to see where I got the following */
+
+ if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
+ /* FIXME: fill in the last byte of the dest ipaddr here to
+ * better comply with RFC1051 in "noarp" mode.
+ */
+ pkt->hard.dest = 0;
+ return hdr_size;
+ }
+ /* otherwise, just fill it in and go! */
+ pkt->hard.dest = daddr;
+
+ return hdr_size; /* success */
+}
+
+static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
+ int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct arc_hardware *hard = &pkt->hard;
+ int ofs;
+
+ arc_printk(D_DURING, dev, "prepare_tx: txbufs=%d/%d/%d\n",
+ lp->next_tx, lp->cur_tx, bufnum);
+
+ /* hard header is not included in packet length */
+ length -= ARC_HDR_SIZE;
+
+ if (length > XMTU) {
+ /* should never happen! other people already check for this. */
+ arc_printk(D_NORMAL, dev, "Bug! prepare_tx with size %d (> %d)\n",
+ length, XMTU);
+ length = XMTU;
+ }
+ if (length > MinTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - length;
+ } else if (length > MTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - length - 3;
+ } else {
+ hard->offset[0] = ofs = 256 - length;
+ }
+
+ lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
+ lp->hw.copy_to_card(dev, bufnum, ofs, &pkt->soft, length);
+
+ lp->lastload_dest = hard->dest;
+
+ return 1; /* done */
+}
diff --git a/drivers/net/arcnet/rfc1201.c b/drivers/net/arcnet/rfc1201.c
new file mode 100644
index 0000000..a4c8562
--- /dev/null
+++ b/drivers/net/arcnet/rfc1201.c
@@ -0,0 +1,547 @@
+/*
+ * Linux ARCnet driver - RFC1201 (standard) packet encapsulation
+ *
+ * Written 1994-1999 by Avery Pennarun.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+
+#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
+
+#include <linux/gfp.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+#include "arcdevice.h"
+
+MODULE_LICENSE("GPL");
+
+static __be16 type_trans(struct sk_buff *skb, struct net_device *dev);
+static void rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length);
+static int build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr);
+static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
+ int bufnum);
+static int continue_tx(struct net_device *dev, int bufnum);
+
+static struct ArcProto rfc1201_proto = {
+ .suffix = 'a',
+ .mtu = 1500, /* could be more, but some receivers can't handle it... */
+ .is_ip = 1, /* This is for sending IP and ARP packages */
+ .rx = rx,
+ .build_header = build_header,
+ .prepare_tx = prepare_tx,
+ .continue_tx = continue_tx,
+ .ack_tx = NULL
+};
+
+static int __init arcnet_rfc1201_init(void)
+{
+ pr_info("%s\n", "RFC1201 \"standard\" (`a') encapsulation support loaded");
+
+ arc_proto_map[ARC_P_IP]
+ = arc_proto_map[ARC_P_IPV6]
+ = arc_proto_map[ARC_P_ARP]
+ = arc_proto_map[ARC_P_RARP]
+ = arc_proto_map[ARC_P_IPX]
+ = arc_proto_map[ARC_P_NOVELL_EC]
+ = &rfc1201_proto;
+
+ /* if someone else already owns the broadcast, we won't take it */
+ if (arc_bcast_proto == arc_proto_default)
+ arc_bcast_proto = &rfc1201_proto;
+
+ return 0;
+}
+
+static void __exit arcnet_rfc1201_exit(void)
+{
+ arcnet_unregister_proto(&rfc1201_proto);
+}
+
+module_init(arcnet_rfc1201_init);
+module_exit(arcnet_rfc1201_exit);
+
+/* Determine a packet's protocol ID.
+ *
+ * With ARCnet we have to convert everything to Ethernet-style stuff.
+ */
+static __be16 type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct archdr *pkt = (struct archdr *)skb->data;
+ struct arc_rfc1201 *soft = &pkt->soft.rfc1201;
+ int hdr_size = ARC_HDR_SIZE + RFC1201_HDR_SIZE;
+
+ /* Pull off the arcnet header. */
+ skb_reset_mac_header(skb);
+ skb_pull(skb, hdr_size);
+
+ if (pkt->hard.dest == 0) {
+ skb->pkt_type = PACKET_BROADCAST;
+ } else if (dev->flags & IFF_PROMISC) {
+ /* if we're not sending to ourselves :) */
+ if (pkt->hard.dest != dev->dev_addr[0])
+ skb->pkt_type = PACKET_OTHERHOST;
+ }
+ /* now return the protocol number */
+ switch (soft->proto) {
+ case ARC_P_IP:
+ return htons(ETH_P_IP);
+ case ARC_P_IPV6:
+ return htons(ETH_P_IPV6);
+ case ARC_P_ARP:
+ return htons(ETH_P_ARP);
+ case ARC_P_RARP:
+ return htons(ETH_P_RARP);
+
+ case ARC_P_IPX:
+ case ARC_P_NOVELL_EC:
+ return htons(ETH_P_802_3);
+ default:
+ dev->stats.rx_errors++;
+ dev->stats.rx_crc_errors++;
+ return 0;
+ }
+
+ return htons(ETH_P_IP);
+}
+
+/* packet receiver */
+static void rx(struct net_device *dev, int bufnum,
+ struct archdr *pkthdr, int length)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sk_buff *skb;
+ struct archdr *pkt = pkthdr;
+ struct arc_rfc1201 *soft = &pkthdr->soft.rfc1201;
+ int saddr = pkt->hard.source, ofs;
+ struct Incoming *in = &lp->rfc1201.incoming[saddr];
+
+ arc_printk(D_DURING, dev, "it's an RFC1201 packet (length=%d)\n",
+ length);
+
+ if (length >= MinTU)
+ ofs = 512 - length;
+ else
+ ofs = 256 - length;
+
+ if (soft->split_flag == 0xFF) { /* Exception Packet */
+ if (length >= 4 + RFC1201_HDR_SIZE) {
+ arc_printk(D_DURING, dev, "compensating for exception packet\n");
+ } else {
+ arc_printk(D_EXTRA, dev, "short RFC1201 exception packet from %02Xh",
+ saddr);
+ return;
+ }
+
+ /* skip over 4-byte junkola */
+ length -= 4;
+ ofs += 4;
+ lp->hw.copy_from_card(dev, bufnum, 512 - length,
+ soft, sizeof(pkt->soft));
+ }
+ if (!soft->split_flag) { /* not split */
+ arc_printk(D_RX, dev, "incoming is not split (splitflag=%d)\n",
+ soft->split_flag);
+
+ if (in->skb) { /* already assembling one! */
+ arc_printk(D_EXTRA, dev, "aborting assembly (seq=%d) for unsplit packet (splitflag=%d, seq=%d)\n",
+ in->sequence, soft->split_flag,
+ soft->sequence);
+ lp->rfc1201.aborted_seq = soft->sequence;
+ dev_kfree_skb_irq(in->skb);
+ dev->stats.rx_errors++;
+ dev->stats.rx_missed_errors++;
+ in->skb = NULL;
+ }
+ in->sequence = soft->sequence;
+
+ skb = alloc_skb(length + ARC_HDR_SIZE, GFP_ATOMIC);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb_put(skb, length + ARC_HDR_SIZE);
+ skb->dev = dev;
+
+ pkt = (struct archdr *)skb->data;
+ soft = &pkt->soft.rfc1201;
+
+ /* up to sizeof(pkt->soft) has already
+ * been copied from the card
+ */
+ memcpy(pkt, pkthdr, sizeof(struct archdr));
+ if (length > sizeof(pkt->soft))
+ lp->hw.copy_from_card(dev, bufnum,
+ ofs + sizeof(pkt->soft),
+ pkt->soft.raw + sizeof(pkt->soft),
+ length - sizeof(pkt->soft));
+
+ /* ARP packets have problems when sent from some DOS systems:
+ * the source address is always 0!
+ * So we take the hardware source addr (which is impossible
+ * to fumble) and insert it ourselves.
+ */
+ if (soft->proto == ARC_P_ARP) {
+ struct arphdr *arp = (struct arphdr *)soft->payload;
+
+ /* make sure addresses are the right length */
+ if (arp->ar_hln == 1 && arp->ar_pln == 4) {
+ uint8_t *cptr = (uint8_t *)arp + sizeof(struct arphdr);
+
+ if (!*cptr) { /* is saddr = 00? */
+ arc_printk(D_EXTRA, dev,
+ "ARP source address was 00h, set to %02Xh\n",
+ saddr);
+ dev->stats.rx_crc_errors++;
+ *cptr = saddr;
+ } else {
+ arc_printk(D_DURING, dev, "ARP source address (%Xh) is fine.\n",
+ *cptr);
+ }
+ } else {
+ arc_printk(D_NORMAL, dev, "funny-shaped ARP packet. (%Xh, %Xh)\n",
+ arp->ar_hln, arp->ar_pln);
+ dev->stats.rx_errors++;
+ dev->stats.rx_crc_errors++;
+ }
+ }
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "rx");
+
+ skb->protocol = type_trans(skb, dev);
+ netif_rx(skb);
+ } else { /* split packet */
+ /* NOTE: MSDOS ARP packet correction should only need to
+ * apply to unsplit packets, since ARP packets are so short.
+ *
+ * My interpretation of the RFC1201 document is that if a
+ * packet is received out of order, the entire assembly
+ * process should be aborted.
+ *
+ * The RFC also mentions "it is possible for successfully
+ * received packets to be retransmitted." As of 0.40 all
+ * previously received packets are allowed, not just the
+ * most recent one.
+ *
+ * We allow multiple assembly processes, one for each
+ * ARCnet card possible on the network.
+ * Seems rather like a waste of memory, but there's no
+ * other way to be reliable.
+ */
+
+ arc_printk(D_RX, dev, "packet is split (splitflag=%d, seq=%d)\n",
+ soft->split_flag, in->sequence);
+
+ if (in->skb && in->sequence != soft->sequence) {
+ arc_printk(D_EXTRA, dev, "wrong seq number (saddr=%d, expected=%d, seq=%d, splitflag=%d)\n",
+ saddr, in->sequence, soft->sequence,
+ soft->split_flag);
+ dev_kfree_skb_irq(in->skb);
+ in->skb = NULL;
+ dev->stats.rx_errors++;
+ dev->stats.rx_missed_errors++;
+ in->lastpacket = in->numpackets = 0;
+ }
+ if (soft->split_flag & 1) { /* first packet in split */
+ arc_printk(D_RX, dev, "brand new splitpacket (splitflag=%d)\n",
+ soft->split_flag);
+ if (in->skb) { /* already assembling one! */
+ arc_printk(D_EXTRA, dev, "aborting previous (seq=%d) assembly (splitflag=%d, seq=%d)\n",
+ in->sequence, soft->split_flag,
+ soft->sequence);
+ dev->stats.rx_errors++;
+ dev->stats.rx_missed_errors++;
+ dev_kfree_skb_irq(in->skb);
+ }
+ in->sequence = soft->sequence;
+ in->numpackets = ((unsigned)soft->split_flag >> 1) + 2;
+ in->lastpacket = 1;
+
+ if (in->numpackets > 16) {
+ arc_printk(D_EXTRA, dev, "incoming packet more than 16 segments; dropping. (splitflag=%d)\n",
+ soft->split_flag);
+ lp->rfc1201.aborted_seq = soft->sequence;
+ dev->stats.rx_errors++;
+ dev->stats.rx_length_errors++;
+ return;
+ }
+ in->skb = skb = alloc_skb(508 * in->numpackets + ARC_HDR_SIZE,
+ GFP_ATOMIC);
+ if (!skb) {
+ arc_printk(D_NORMAL, dev, "(split) memory squeeze, dropping packet.\n");
+ lp->rfc1201.aborted_seq = soft->sequence;
+ dev->stats.rx_dropped++;
+ return;
+ }
+ skb->dev = dev;
+ pkt = (struct archdr *)skb->data;
+ soft = &pkt->soft.rfc1201;
+
+ memcpy(pkt, pkthdr, ARC_HDR_SIZE + RFC1201_HDR_SIZE);
+ skb_put(skb, ARC_HDR_SIZE + RFC1201_HDR_SIZE);
+
+ soft->split_flag = 0; /* end result won't be split */
+ } else { /* not first packet */
+ int packetnum = ((unsigned)soft->split_flag >> 1) + 1;
+
+ /* if we're not assembling, there's no point trying to
+ * continue.
+ */
+ if (!in->skb) {
+ if (lp->rfc1201.aborted_seq != soft->sequence) {
+ arc_printk(D_EXTRA, dev, "can't continue split without starting first! (splitflag=%d, seq=%d, aborted=%d)\n",
+ soft->split_flag,
+ soft->sequence,
+ lp->rfc1201.aborted_seq);
+ dev->stats.rx_errors++;
+ dev->stats.rx_missed_errors++;
+ }
+ return;
+ }
+ in->lastpacket++;
+ /* if not the right flag */
+ if (packetnum != in->lastpacket) {
+ /* harmless duplicate? ignore. */
+ if (packetnum <= in->lastpacket - 1) {
+ arc_printk(D_EXTRA, dev, "duplicate splitpacket ignored! (splitflag=%d)\n",
+ soft->split_flag);
+ dev->stats.rx_errors++;
+ dev->stats.rx_frame_errors++;
+ return;
+ }
+ /* "bad" duplicate, kill reassembly */
+ arc_printk(D_EXTRA, dev, "out-of-order splitpacket, reassembly (seq=%d) aborted (splitflag=%d, seq=%d)\n",
+ in->sequence, soft->split_flag,
+ soft->sequence);
+ lp->rfc1201.aborted_seq = soft->sequence;
+ dev_kfree_skb_irq(in->skb);
+ in->skb = NULL;
+ dev->stats.rx_errors++;
+ dev->stats.rx_missed_errors++;
+ in->lastpacket = in->numpackets = 0;
+ return;
+ }
+ pkt = (struct archdr *)in->skb->data;
+ soft = &pkt->soft.rfc1201;
+ }
+
+ skb = in->skb;
+
+ lp->hw.copy_from_card(dev, bufnum, ofs + RFC1201_HDR_SIZE,
+ skb->data + skb->len,
+ length - RFC1201_HDR_SIZE);
+ skb_put(skb, length - RFC1201_HDR_SIZE);
+
+ /* are we done? */
+ if (in->lastpacket == in->numpackets) {
+ in->skb = NULL;
+ in->lastpacket = in->numpackets = 0;
+
+ arc_printk(D_SKB_SIZE, dev, "skb: received %d bytes from %02X (unsplit)\n",
+ skb->len, pkt->hard.source);
+ arc_printk(D_SKB_SIZE, dev, "skb: received %d bytes from %02X (split)\n",
+ skb->len, pkt->hard.source);
+ if (BUGLVL(D_SKB))
+ arcnet_dump_skb(dev, skb, "rx");
+
+ skb->protocol = type_trans(skb, dev);
+ netif_rx(skb);
+ }
+ }
+}
+
+/* Create the ARCnet hard/soft headers for RFC1201. */
+static int build_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, uint8_t daddr)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int hdr_size = ARC_HDR_SIZE + RFC1201_HDR_SIZE;
+ struct archdr *pkt = skb_push(skb, hdr_size);
+ struct arc_rfc1201 *soft = &pkt->soft.rfc1201;
+
+ /* set the protocol ID according to RFC1201 */
+ switch (type) {
+ case ETH_P_IP:
+ soft->proto = ARC_P_IP;
+ break;
+ case ETH_P_IPV6:
+ soft->proto = ARC_P_IPV6;
+ break;
+ case ETH_P_ARP:
+ soft->proto = ARC_P_ARP;
+ break;
+ case ETH_P_RARP:
+ soft->proto = ARC_P_RARP;
+ break;
+ case ETH_P_IPX:
+ case ETH_P_802_3:
+ case ETH_P_802_2:
+ soft->proto = ARC_P_IPX;
+ break;
+ case ETH_P_ATALK:
+ soft->proto = ARC_P_ATALK;
+ break;
+ default:
+ arc_printk(D_NORMAL, dev, "RFC1201: I don't understand protocol %d (%Xh)\n",
+ type, type);
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+ return 0;
+ }
+
+ /* Set the source hardware address.
+ *
+ * This is pretty pointless for most purposes, but it can help in
+ * debugging. ARCnet does not allow us to change the source address
+ * in the actual packet sent.
+ */
+ pkt->hard.source = *dev->dev_addr;
+
+ soft->sequence = htons(lp->rfc1201.sequence++);
+ soft->split_flag = 0; /* split packets are done elsewhere */
+
+ /* see linux/net/ethernet/eth.c to see where I got the following */
+
+ if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
+ /* FIXME: fill in the last byte of the dest ipaddr here
+ * to better comply with RFC1051 in "noarp" mode.
+ * For now, always broadcasting will probably at least get
+ * packets sent out :)
+ */
+ pkt->hard.dest = 0;
+ return hdr_size;
+ }
+ /* otherwise, drop in the dest address */
+ pkt->hard.dest = daddr;
+ return hdr_size;
+}
+
+static void load_pkt(struct net_device *dev, struct arc_hardware *hard,
+ struct arc_rfc1201 *soft, int softlen, int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int ofs;
+
+ /* assume length <= XMTU: someone should have handled that by now. */
+
+ if (softlen > MinTU) {
+ hard->offset[0] = 0;
+ hard->offset[1] = ofs = 512 - softlen;
+ } else if (softlen > MTU) { /* exception packet - add an extra header */
+ struct arc_rfc1201 excsoft;
+
+ excsoft.proto = soft->proto;
+ excsoft.split_flag = 0xff;
+ excsoft.sequence = htons(0xffff);
+
+ hard->offset[0] = 0;
+ ofs = 512 - softlen;
+ hard->offset[1] = ofs - RFC1201_HDR_SIZE;
+ lp->hw.copy_to_card(dev, bufnum, ofs - RFC1201_HDR_SIZE,
+ &excsoft, RFC1201_HDR_SIZE);
+ } else {
+ hard->offset[0] = ofs = 256 - softlen;
+ }
+
+ lp->hw.copy_to_card(dev, bufnum, 0, hard, ARC_HDR_SIZE);
+ lp->hw.copy_to_card(dev, bufnum, ofs, soft, softlen);
+
+ lp->lastload_dest = hard->dest;
+}
+
+static int prepare_tx(struct net_device *dev, struct archdr *pkt, int length,
+ int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ const int maxsegsize = XMTU - RFC1201_HDR_SIZE;
+ struct Outgoing *out;
+
+ arc_printk(D_DURING, dev, "prepare_tx: txbufs=%d/%d/%d\n",
+ lp->next_tx, lp->cur_tx, bufnum);
+
+ /* hard header is not included in packet length */
+ length -= ARC_HDR_SIZE;
+ pkt->soft.rfc1201.split_flag = 0;
+
+ /* need to do a split packet? */
+ if (length > XMTU) {
+ out = &lp->outgoing;
+
+ out->length = length - RFC1201_HDR_SIZE;
+ out->dataleft = lp->outgoing.length;
+ out->numsegs = (out->dataleft + maxsegsize - 1) / maxsegsize;
+ out->segnum = 0;
+
+ arc_printk(D_DURING, dev, "rfc1201 prep_tx: ready for %d-segment split (%d bytes, seq=%d)\n",
+ out->numsegs, out->length,
+ pkt->soft.rfc1201.sequence);
+
+ return 0; /* not done */
+ }
+ /* just load the packet into the buffers and send it off */
+ load_pkt(dev, &pkt->hard, &pkt->soft.rfc1201, length, bufnum);
+
+ return 1; /* done */
+}
+
+static int continue_tx(struct net_device *dev, int bufnum)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct Outgoing *out = &lp->outgoing;
+ struct arc_hardware *hard = &out->pkt->hard;
+ struct arc_rfc1201 *soft = &out->pkt->soft.rfc1201, *newsoft;
+ int maxsegsize = XMTU - RFC1201_HDR_SIZE;
+ int seglen;
+
+ arc_printk(D_DURING, dev,
+ "rfc1201 continue_tx: loading segment %d(+1) of %d (seq=%d)\n",
+ out->segnum, out->numsegs, soft->sequence);
+
+ /* the "new" soft header comes right before the data chunk */
+ newsoft = (struct arc_rfc1201 *)
+ (out->pkt->soft.raw + out->length - out->dataleft);
+
+ if (!out->segnum) /* first packet; newsoft == soft */
+ newsoft->split_flag = ((out->numsegs - 2) << 1) | 1;
+ else {
+ newsoft->split_flag = out->segnum << 1;
+ newsoft->proto = soft->proto;
+ newsoft->sequence = soft->sequence;
+ }
+
+ seglen = maxsegsize;
+ if (seglen > out->dataleft)
+ seglen = out->dataleft;
+ out->dataleft -= seglen;
+
+ load_pkt(dev, hard, newsoft, seglen + RFC1201_HDR_SIZE, bufnum);
+
+ out->segnum++;
+ if (out->segnum >= out->numsegs)
+ return 1;
+ else
+ return 0;
+}