v4.19.13 snapshot.
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
new file mode 100644
index 0000000..8d96e86
--- /dev/null
+++ b/drivers/tty/isicom.c
@@ -0,0 +1,1722 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Original driver code supplied by Multi-Tech
+ *
+ * Changes
+ * 1/9/98 alan@lxorguk.ukuu.org.uk
+ * Merge to 2.0.x kernel tree
+ * Obtain and use official major/minors
+ * Loader switched to a misc device
+ * (fixed range check bug as a side effect)
+ * Printk clean up
+ * 9/12/98 alan@lxorguk.ukuu.org.uk
+ * Rough port to 2.1.x
+ *
+ * 10/6/99 sameer Merged the ISA and PCI drivers to
+ * a new unified driver.
+ *
+ * 3/9/99 sameer Added support for ISI4616 cards.
+ *
+ * 16/9/99 sameer We do not force RTS low anymore.
+ * This is to prevent the firmware
+ * from getting confused.
+ *
+ * 26/10/99 sameer Cosmetic changes:The driver now
+ * dumps the Port Count information
+ * along with I/O address and IRQ.
+ *
+ * 13/12/99 sameer Fixed the problem with IRQ sharing.
+ *
+ * 10/5/00 sameer Fixed isicom_shutdown_board()
+ * to not lower DTR on all the ports
+ * when the last port on the card is
+ * closed.
+ *
+ * 10/5/00 sameer Signal mask setup command added
+ * to isicom_setup_port and
+ * isicom_shutdown_port.
+ *
+ * 24/5/00 sameer The driver is now SMP aware.
+ *
+ *
+ * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
+ *
+ *
+ * 03/01/01 anil .s Added support for resetting the
+ * internal modems on ISI cards.
+ *
+ * 08/02/01 anil .s Upgraded the driver for kernel
+ * 2.4.x
+ *
+ * 11/04/01 Kevin Fixed firmware load problem with
+ * ISIHP-4X card
+ *
+ * 30/04/01 anil .s Fixed the remote login through
+ * ISI port problem. Now the link
+ * does not go down before password
+ * prompt.
+ *
+ * 03/05/01 anil .s Fixed the problem with IRQ sharing
+ * among ISI-PCI cards.
+ *
+ * 03/05/01 anil .s Added support to display the version
+ * info during insmod as well as module
+ * listing by lsmod.
+ *
+ * 10/05/01 anil .s Done the modifications to the source
+ * file and Install script so that the
+ * same installation can be used for
+ * 2.2.x and 2.4.x kernel.
+ *
+ * 06/06/01 anil .s Now we drop both dtr and rts during
+ * shutdown_port as well as raise them
+ * during isicom_config_port.
+ *
+ * 09/06/01 acme@conectiva.com.br use capable, not suser, do
+ * restore_flags on failure in
+ * isicom_send_break, verify put_user
+ * result
+ *
+ * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
+ * Baud index extended to 21
+ *
+ * 20/03/03 ranjeeth Made to work for Linux Advanced server.
+ * Taken care of license warning.
+ *
+ * 10/12/03 Ravindra Made to work for Fedora Core 1 of
+ * Red Hat Distribution
+ *
+ * 06/01/05 Alan Cox Merged the ISI and base kernel strands
+ * into a single 2.6 driver
+ *
+ * ***********************************************************
+ *
+ * To use this driver you also need the support package. You
+ * can find this in RPM format on
+ * ftp://ftp.linux.org.uk/pub/linux/alan
+ *
+ * You can find the original tools for this direct from Multitech
+ * ftp://ftp.multitech.com/ISI-Cards/
+ *
+ * Having installed the cards the module options (/etc/modprobe.d/)
+ *
+ * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
+ *
+ * Omit those entries for boards you don't have installed.
+ *
+ * TODO
+ * Merge testing
+ * 64-bit verification
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/termios.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/serial.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+#include <linux/pci.h>
+
+#include <linux/isicom.h>
+
+#define InterruptTheCard(base) outw(0, (base) + 0xc)
+#define ClearInterrupt(base) inw((base) + 0x0a)
+
+#ifdef DEBUG
+#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
+#else
+#define isicom_paranoia_check(a, b, c) 0
+#endif
+
+static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
+static void isicom_remove(struct pci_dev *);
+
+static const struct pci_device_id isicom_pci_tbl[] = {
+ { PCI_DEVICE(VENDOR_ID, 0x2028) },
+ { PCI_DEVICE(VENDOR_ID, 0x2051) },
+ { PCI_DEVICE(VENDOR_ID, 0x2052) },
+ { PCI_DEVICE(VENDOR_ID, 0x2053) },
+ { PCI_DEVICE(VENDOR_ID, 0x2054) },
+ { PCI_DEVICE(VENDOR_ID, 0x2055) },
+ { PCI_DEVICE(VENDOR_ID, 0x2056) },
+ { PCI_DEVICE(VENDOR_ID, 0x2057) },
+ { PCI_DEVICE(VENDOR_ID, 0x2058) },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
+
+static struct pci_driver isicom_driver = {
+ .name = "isicom",
+ .id_table = isicom_pci_tbl,
+ .probe = isicom_probe,
+ .remove = isicom_remove
+};
+
+static int prev_card = 3; /* start servicing isi_card[0] */
+static struct tty_driver *isicom_normal;
+
+static void isicom_tx(struct timer_list *unused);
+static void isicom_start(struct tty_struct *tty);
+
+static DEFINE_TIMER(tx, isicom_tx);
+
+/* baud index mappings from linux defns to isi */
+
+static signed char linuxb_to_isib[] = {
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
+};
+
+struct isi_board {
+ unsigned long base;
+ int irq;
+ unsigned char port_count;
+ unsigned short status;
+ unsigned short port_status; /* each bit for each port */
+ unsigned short shift_count;
+ struct isi_port *ports;
+ signed char count;
+ spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
+ unsigned long flags;
+ unsigned int index;
+};
+
+struct isi_port {
+ unsigned short magic;
+ struct tty_port port;
+ u16 channel;
+ u16 status;
+ struct isi_board *card;
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+};
+
+static struct isi_board isi_card[BOARD_COUNT];
+static struct isi_port isi_ports[PORT_COUNT];
+
+/*
+ * Locking functions for card level locking. We need to own both
+ * the kernel lock for the card and have the card in a position that
+ * it wants to talk.
+ */
+
+static int WaitTillCardIsFree(unsigned long base)
+{
+ unsigned int count = 0;
+
+ while (!(inw(base + 0xe) & 0x1) && count++ < 100)
+ mdelay(1);
+
+ return !(inw(base + 0xe) & 0x1);
+}
+
+static int lock_card(struct isi_board *card)
+{
+ unsigned long base = card->base;
+ unsigned int retries, a;
+
+ for (retries = 0; retries < 10; retries++) {
+ spin_lock_irqsave(&card->card_lock, card->flags);
+ for (a = 0; a < 10; a++) {
+ if (inw(base + 0xe) & 0x1)
+ return 1;
+ udelay(10);
+ }
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+ msleep(10);
+ }
+ pr_warn("Failed to lock Card (0x%lx)\n", card->base);
+
+ return 0; /* Failed to acquire the card! */
+}
+
+static void unlock_card(struct isi_board *card)
+{
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+}
+
+/*
+ * ISI Card specific ops ...
+ */
+
+/* card->lock HAS to be held */
+static void raise_dtr(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0504, base);
+ InterruptTheCard(base);
+ port->status |= ISI_DTR;
+}
+
+/* card->lock HAS to be held */
+static void drop_dtr(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0404, base);
+ InterruptTheCard(base);
+ port->status &= ~ISI_DTR;
+}
+
+/* card->lock HAS to be held */
+static inline void raise_rts(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0a04, base);
+ InterruptTheCard(base);
+ port->status |= ISI_RTS;
+}
+
+/* card->lock HAS to be held */
+static inline void drop_rts(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0804, base);
+ InterruptTheCard(base);
+ port->status &= ~ISI_RTS;
+}
+
+/* card->lock MUST NOT be held */
+
+static void isicom_dtr_rts(struct tty_port *port, int on)
+{
+ struct isi_port *ip = container_of(port, struct isi_port, port);
+ struct isi_board *card = ip->card;
+ unsigned long base = card->base;
+ u16 channel = ip->channel;
+
+ if (!lock_card(card))
+ return;
+
+ if (on) {
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0f04, base);
+ InterruptTheCard(base);
+ ip->status |= (ISI_DTR | ISI_RTS);
+ } else {
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0C04, base);
+ InterruptTheCard(base);
+ ip->status &= ~(ISI_DTR | ISI_RTS);
+ }
+ unlock_card(card);
+}
+
+/* card->lock HAS to be held */
+static void drop_dtr_rts(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0c04, base);
+ InterruptTheCard(base);
+ port->status &= ~(ISI_RTS | ISI_DTR);
+}
+
+/*
+ * ISICOM Driver specific routines ...
+ *
+ */
+
+static inline int __isicom_paranoia_check(struct isi_port const *port,
+ char *name, const char *routine)
+{
+ if (!port) {
+ pr_warn("Warning: bad isicom magic for dev %s in %s\n",
+ name, routine);
+ return 1;
+ }
+ if (port->magic != ISICOM_MAGIC) {
+ pr_warn("Warning: NULL isicom port for dev %s in %s\n",
+ name, routine);
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Transmitter.
+ *
+ * We shovel data into the card buffers on a regular basis. The card
+ * will do the rest of the work for us.
+ */
+
+static void isicom_tx(struct timer_list *unused)
+{
+ unsigned long flags, base;
+ unsigned int retries;
+ short count = (BOARD_COUNT-1), card;
+ short txcount, wrd, residue, word_count, cnt;
+ struct isi_port *port;
+ struct tty_struct *tty;
+
+ /* find next active board */
+ card = (prev_card + 1) & 0x0003;
+ while (count-- > 0) {
+ if (isi_card[card].status & BOARD_ACTIVE)
+ break;
+ card = (card + 1) & 0x0003;
+ }
+ if (!(isi_card[card].status & BOARD_ACTIVE))
+ goto sched_again;
+
+ prev_card = card;
+
+ count = isi_card[card].port_count;
+ port = isi_card[card].ports;
+ base = isi_card[card].base;
+
+ spin_lock_irqsave(&isi_card[card].card_lock, flags);
+ for (retries = 0; retries < 100; retries++) {
+ if (inw(base + 0xe) & 0x1)
+ break;
+ udelay(2);
+ }
+ if (retries >= 100)
+ goto unlock;
+
+ tty = tty_port_tty_get(&port->port);
+ if (tty == NULL)
+ goto put_unlock;
+
+ for (; count > 0; count--, port++) {
+ /* port not active or tx disabled to force flow control */
+ if (!tty_port_initialized(&port->port) ||
+ !(port->status & ISI_TXOK))
+ continue;
+
+ txcount = min_t(short, TX_SIZE, port->xmit_cnt);
+ if (txcount <= 0 || tty->stopped || tty->hw_stopped)
+ continue;
+
+ if (!(inw(base + 0x02) & (1 << port->channel)))
+ continue;
+
+ pr_debug("txing %d bytes, port%d.\n",
+ txcount, port->channel + 1);
+ outw((port->channel << isi_card[card].shift_count) | txcount,
+ base);
+ residue = NO;
+ wrd = 0;
+ while (1) {
+ cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
+ - port->xmit_tail));
+ if (residue == YES) {
+ residue = NO;
+ if (cnt > 0) {
+ wrd |= (port->port.xmit_buf[port->xmit_tail]
+ << 8);
+ port->xmit_tail = (port->xmit_tail + 1)
+ & (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt--;
+ txcount--;
+ cnt--;
+ outw(wrd, base);
+ } else {
+ outw(wrd, base);
+ break;
+ }
+ }
+ if (cnt <= 0)
+ break;
+ word_count = cnt >> 1;
+ outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
+ port->xmit_tail = (port->xmit_tail
+ + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
+ txcount -= (word_count << 1);
+ port->xmit_cnt -= (word_count << 1);
+ if (cnt & 0x0001) {
+ residue = YES;
+ wrd = port->port.xmit_buf[port->xmit_tail];
+ port->xmit_tail = (port->xmit_tail + 1)
+ & (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt--;
+ txcount--;
+ }
+ }
+
+ InterruptTheCard(base);
+ if (port->xmit_cnt <= 0)
+ port->status &= ~ISI_TXOK;
+ if (port->xmit_cnt <= WAKEUP_CHARS)
+ tty_wakeup(tty);
+ }
+
+put_unlock:
+ tty_kref_put(tty);
+unlock:
+ spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
+ /* schedule another tx for hopefully in about 10ms */
+sched_again:
+ mod_timer(&tx, jiffies + msecs_to_jiffies(10));
+}
+
+/*
+ * Main interrupt handler routine
+ */
+
+static irqreturn_t isicom_interrupt(int irq, void *dev_id)
+{
+ struct isi_board *card = dev_id;
+ struct isi_port *port;
+ struct tty_struct *tty;
+ unsigned long base;
+ u16 header, word_count, count, channel;
+ short byte_count;
+ unsigned char *rp;
+
+ if (!card || !(card->status & FIRMWARE_LOADED))
+ return IRQ_NONE;
+
+ base = card->base;
+
+ /* did the card interrupt us? */
+ if (!(inw(base + 0x0e) & 0x02))
+ return IRQ_NONE;
+
+ spin_lock(&card->card_lock);
+
+ /*
+ * disable any interrupts from the PCI card and lower the
+ * interrupt line
+ */
+ outw(0x8000, base+0x04);
+ ClearInterrupt(base);
+
+ inw(base); /* get the dummy word out */
+ header = inw(base);
+ channel = (header & 0x7800) >> card->shift_count;
+ byte_count = header & 0xff;
+
+ if (channel + 1 > card->port_count) {
+ pr_warn("%s(0x%lx): %d(channel) > port_count\n",
+ __func__, base, channel + 1);
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+ port = card->ports + channel;
+ if (!tty_port_initialized(&port->port)) {
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+
+ tty = tty_port_tty_get(&port->port);
+ if (tty == NULL) {
+ word_count = byte_count >> 1;
+ while (byte_count > 1) {
+ inw(base);
+ byte_count -= 2;
+ }
+ if (byte_count & 0x01)
+ inw(base);
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+
+ if (header & 0x8000) { /* Status Packet */
+ header = inw(base);
+ switch (header & 0xff) {
+ case 0: /* Change in EIA signals */
+ if (tty_port_check_carrier(&port->port)) {
+ if (port->status & ISI_DCD) {
+ if (!(header & ISI_DCD)) {
+ /* Carrier has been lost */
+ pr_debug("%s: DCD->low.\n",
+ __func__);
+ port->status &= ~ISI_DCD;
+ tty_hangup(tty);
+ }
+ } else if (header & ISI_DCD) {
+ /* Carrier has been detected */
+ pr_debug("%s: DCD->high.\n",
+ __func__);
+ port->status |= ISI_DCD;
+ wake_up_interruptible(&port->port.open_wait);
+ }
+ } else {
+ if (header & ISI_DCD)
+ port->status |= ISI_DCD;
+ else
+ port->status &= ~ISI_DCD;
+ }
+
+ if (tty_port_cts_enabled(&port->port)) {
+ if (tty->hw_stopped) {
+ if (header & ISI_CTS) {
+ tty->hw_stopped = 0;
+ /* start tx ing */
+ port->status |= (ISI_TXOK
+ | ISI_CTS);
+ tty_wakeup(tty);
+ }
+ } else if (!(header & ISI_CTS)) {
+ tty->hw_stopped = 1;
+ /* stop tx ing */
+ port->status &= ~(ISI_TXOK | ISI_CTS);
+ }
+ } else {
+ if (header & ISI_CTS)
+ port->status |= ISI_CTS;
+ else
+ port->status &= ~ISI_CTS;
+ }
+
+ if (header & ISI_DSR)
+ port->status |= ISI_DSR;
+ else
+ port->status &= ~ISI_DSR;
+
+ if (header & ISI_RI)
+ port->status |= ISI_RI;
+ else
+ port->status &= ~ISI_RI;
+
+ break;
+
+ case 1: /* Received Break !!! */
+ tty_insert_flip_char(&port->port, 0, TTY_BREAK);
+ if (port->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ tty_flip_buffer_push(&port->port);
+ break;
+
+ case 2: /* Statistics */
+ pr_debug("%s: stats!!!\n", __func__);
+ break;
+
+ default:
+ pr_debug("%s: Unknown code in status packet.\n",
+ __func__);
+ break;
+ }
+ } else { /* Data Packet */
+ count = tty_prepare_flip_string(&port->port, &rp,
+ byte_count & ~1);
+ pr_debug("%s: Can rx %d of %d bytes.\n",
+ __func__, count, byte_count);
+ word_count = count >> 1;
+ insw(base, rp, word_count);
+ byte_count -= (word_count << 1);
+ if (count & 0x0001) {
+ tty_insert_flip_char(&port->port, inw(base) & 0xff,
+ TTY_NORMAL);
+ byte_count -= 2;
+ }
+ if (byte_count > 0) {
+ pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
+ __func__, base, channel + 1);
+ /* drain out unread xtra data */
+ while (byte_count > 0) {
+ inw(base);
+ byte_count -= 2;
+ }
+ }
+ tty_flip_buffer_push(&port->port);
+ }
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ tty_kref_put(tty);
+
+ return IRQ_HANDLED;
+}
+
+static void isicom_config_port(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long baud;
+ unsigned long base = card->base;
+ u16 channel_setup, channel = port->channel,
+ shift_count = card->shift_count;
+ unsigned char flow_ctrl;
+
+ /* FIXME: Switch to new tty baud API */
+ baud = C_BAUD(tty);
+ if (baud & CBAUDEX) {
+ baud &= ~CBAUDEX;
+
+ /* if CBAUDEX bit is on and the baud is set to either 50 or 75
+ * then the card is programmed for 57.6Kbps or 115Kbps
+ * respectively.
+ */
+
+ /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
+ if (baud < 1 || baud > 4)
+ tty->termios.c_cflag &= ~CBAUDEX;
+ else
+ baud += 15;
+ }
+ if (baud == 15) {
+
+ /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
+ * by the set_serial_info ioctl ... this is done by
+ * the 'setserial' utility.
+ */
+
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ baud++; /* 57.6 Kbps */
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ baud += 2; /* 115 Kbps */
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ baud += 3; /* 230 kbps*/
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ baud += 4; /* 460 kbps*/
+ }
+ if (linuxb_to_isib[baud] == -1) {
+ /* hang up */
+ drop_dtr(port);
+ return;
+ } else
+ raise_dtr(port);
+
+ if (WaitTillCardIsFree(base) == 0) {
+ outw(0x8000 | (channel << shift_count) | 0x03, base);
+ outw(linuxb_to_isib[baud] << 8 | 0x03, base);
+ channel_setup = 0;
+ switch (C_CSIZE(tty)) {
+ case CS5:
+ channel_setup |= ISICOM_CS5;
+ break;
+ case CS6:
+ channel_setup |= ISICOM_CS6;
+ break;
+ case CS7:
+ channel_setup |= ISICOM_CS7;
+ break;
+ case CS8:
+ channel_setup |= ISICOM_CS8;
+ break;
+ }
+
+ if (C_CSTOPB(tty))
+ channel_setup |= ISICOM_2SB;
+ if (C_PARENB(tty)) {
+ channel_setup |= ISICOM_EVPAR;
+ if (C_PARODD(tty))
+ channel_setup |= ISICOM_ODPAR;
+ }
+ outw(channel_setup, base);
+ InterruptTheCard(base);
+ }
+ tty_port_set_check_carrier(&port->port, !C_CLOCAL(tty));
+
+ /* flow control settings ...*/
+ flow_ctrl = 0;
+ tty_port_set_cts_flow(&port->port, C_CRTSCTS(tty));
+ if (C_CRTSCTS(tty))
+ flow_ctrl |= ISICOM_CTSRTS;
+ if (I_IXON(tty))
+ flow_ctrl |= ISICOM_RESPOND_XONXOFF;
+ if (I_IXOFF(tty))
+ flow_ctrl |= ISICOM_INITIATE_XONXOFF;
+
+ if (WaitTillCardIsFree(base) == 0) {
+ outw(0x8000 | (channel << shift_count) | 0x04, base);
+ outw(flow_ctrl << 8 | 0x05, base);
+ outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
+ InterruptTheCard(base);
+ }
+
+ /* rx enabled -> enable port for rx on the card */
+ if (C_CREAD(tty)) {
+ card->port_status |= (1 << channel);
+ outw(card->port_status, base + 0x02);
+ }
+}
+
+/* open et all */
+
+static inline void isicom_setup_board(struct isi_board *bp)
+{
+ int channel;
+ struct isi_port *port;
+
+ bp->count++;
+ if (!(bp->status & BOARD_INIT)) {
+ port = bp->ports;
+ for (channel = 0; channel < bp->port_count; channel++, port++)
+ drop_dtr_rts(port);
+ }
+ bp->status |= BOARD_ACTIVE | BOARD_INIT;
+}
+
+/* Activate and thus setup board are protected from races against shutdown
+ by the tty_port mutex */
+
+static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
+{
+ struct isi_port *port = container_of(tport, struct isi_port, port);
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (tty_port_alloc_xmit_buf(tport) < 0)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ isicom_setup_board(card);
+
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+
+ /* discard any residual data */
+ if (WaitTillCardIsFree(card->base) == 0) {
+ outw(0x8000 | (port->channel << card->shift_count) | 0x02,
+ card->base);
+ outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
+ InterruptTheCard(card->base);
+ }
+ isicom_config_port(tty);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ return 0;
+}
+
+static int isicom_carrier_raised(struct tty_port *port)
+{
+ struct isi_port *ip = container_of(port, struct isi_port, port);
+ return (ip->status & ISI_DCD)?1 : 0;
+}
+
+static struct tty_port *isicom_find_port(struct tty_struct *tty)
+{
+ struct isi_port *port;
+ struct isi_board *card;
+ unsigned int board;
+ int line = tty->index;
+
+ board = BOARD(line);
+ card = &isi_card[board];
+
+ if (!(card->status & FIRMWARE_LOADED))
+ return NULL;
+
+ /* open on a port greater than the port count for the card !!! */
+ if (line > ((board * 16) + card->port_count - 1))
+ return NULL;
+
+ port = &isi_ports[line];
+ if (isicom_paranoia_check(port, tty->name, "isicom_open"))
+ return NULL;
+
+ return &port->port;
+}
+
+static int isicom_open(struct tty_struct *tty, struct file *filp)
+{
+ struct isi_port *port;
+ struct tty_port *tport;
+
+ tport = isicom_find_port(tty);
+ if (tport == NULL)
+ return -ENODEV;
+ port = container_of(tport, struct isi_port, port);
+
+ tty->driver_data = port;
+ return tty_port_open(tport, tty, filp);
+}
+
+/* close et all */
+
+/* card->lock HAS to be held */
+static void isicom_shutdown_port(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+
+ if (--card->count < 0) {
+ pr_debug("%s: bad board(0x%lx) count %d.\n",
+ __func__, card->base, card->count);
+ card->count = 0;
+ }
+ /* last port was closed, shutdown that board too */
+ if (!card->count)
+ card->status &= BOARD_ACTIVE;
+}
+
+static void isicom_flush_buffer(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ tty_wakeup(tty);
+}
+
+static void isicom_shutdown(struct tty_port *port)
+{
+ struct isi_port *ip = container_of(port, struct isi_port, port);
+ struct isi_board *card = ip->card;
+ unsigned long flags;
+
+ /* indicate to the card that no more data can be received
+ on this port */
+ spin_lock_irqsave(&card->card_lock, flags);
+ card->port_status &= ~(1 << ip->channel);
+ outw(card->port_status, card->base + 0x02);
+ isicom_shutdown_port(ip);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ tty_port_free_xmit_buf(port);
+}
+
+static void isicom_close(struct tty_struct *tty, struct file *filp)
+{
+ struct isi_port *ip = tty->driver_data;
+ struct tty_port *port;
+
+ if (ip == NULL)
+ return;
+
+ port = &ip->port;
+ if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
+ return;
+ tty_port_close(port, tty, filp);
+}
+
+/* write et all */
+static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
+ int count)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+ int cnt, total = 0;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_write"))
+ return 0;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ while (1) {
+ cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
+ - 1, SERIAL_XMIT_SIZE - port->xmit_head));
+ if (cnt <= 0)
+ break;
+
+ memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
+ port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
+ - 1);
+ port->xmit_cnt += cnt;
+ buf += cnt;
+ count -= cnt;
+ total += cnt;
+ }
+ if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+ port->status |= ISI_TXOK;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return total;
+}
+
+/* put_char et all */
+static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
+ return 0;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return 0;
+ }
+
+ port->port.xmit_buf[port->xmit_head++] = ch;
+ port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt++;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return 1;
+}
+
+/* flush_chars et all */
+static void isicom_flush_chars(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
+ return;
+
+ if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !port->port.xmit_buf)
+ return;
+
+ /* this tells the transmitter to consider this port for
+ data output to the card ... that's the best we can do. */
+ port->status |= ISI_TXOK;
+}
+
+/* write_room et all */
+static int isicom_write_room(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ int free;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
+ return 0;
+
+ free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
+ if (free < 0)
+ free = 0;
+ return free;
+}
+
+/* chars_in_buffer et all */
+static int isicom_chars_in_buffer(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
+ return 0;
+ return port->xmit_cnt;
+}
+
+/* ioctl et all */
+static int isicom_send_break(struct tty_struct *tty, int length)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+
+ if (length == -1)
+ return -EOPNOTSUPP;
+
+ if (!lock_card(card))
+ return -EINVAL;
+
+ outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
+ outw((length & 0xff) << 8 | 0x00, base);
+ outw((length & 0xff00u), base);
+ InterruptTheCard(base);
+
+ unlock_card(card);
+ return 0;
+}
+
+static int isicom_tiocmget(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ /* just send the port status */
+ u16 status = port->status;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
+ ((status & ISI_DTR) ? TIOCM_DTR : 0) |
+ ((status & ISI_DCD) ? TIOCM_CAR : 0) |
+ ((status & ISI_DSR) ? TIOCM_DSR : 0) |
+ ((status & ISI_CTS) ? TIOCM_CTS : 0) |
+ ((status & ISI_RI ) ? TIOCM_RI : 0);
+}
+
+static int isicom_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct isi_port *port = tty->driver_data;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ spin_lock_irqsave(&port->card->card_lock, flags);
+ if (set & TIOCM_RTS)
+ raise_rts(port);
+ if (set & TIOCM_DTR)
+ raise_dtr(port);
+
+ if (clear & TIOCM_RTS)
+ drop_rts(port);
+ if (clear & TIOCM_DTR)
+ drop_dtr(port);
+ spin_unlock_irqrestore(&port->card->card_lock, flags);
+
+ return 0;
+}
+
+static int isicom_set_serial_info(struct tty_struct *tty,
+ struct serial_struct __user *info)
+{
+ struct isi_port *port = tty->driver_data;
+ struct serial_struct newinfo;
+ int reconfig_port;
+
+ if (copy_from_user(&newinfo, info, sizeof(newinfo)))
+ return -EFAULT;
+
+ mutex_lock(&port->port.mutex);
+ reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
+ (newinfo.flags & ASYNC_SPD_MASK));
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if ((newinfo.close_delay != port->port.close_delay) ||
+ (newinfo.closing_wait != port->port.closing_wait) ||
+ ((newinfo.flags & ~ASYNC_USR_MASK) !=
+ (port->port.flags & ~ASYNC_USR_MASK))) {
+ mutex_unlock(&port->port.mutex);
+ return -EPERM;
+ }
+ port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
+ (newinfo.flags & ASYNC_USR_MASK));
+ } else {
+ port->port.close_delay = newinfo.close_delay;
+ port->port.closing_wait = newinfo.closing_wait;
+ port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
+ (newinfo.flags & ASYNC_FLAGS));
+ }
+ if (reconfig_port) {
+ unsigned long flags;
+ spin_lock_irqsave(&port->card->card_lock, flags);
+ isicom_config_port(tty);
+ spin_unlock_irqrestore(&port->card->card_lock, flags);
+ }
+ mutex_unlock(&port->port.mutex);
+ return 0;
+}
+
+static int isicom_get_serial_info(struct isi_port *port,
+ struct serial_struct __user *info)
+{
+ struct serial_struct out_info;
+
+ mutex_lock(&port->port.mutex);
+ memset(&out_info, 0, sizeof(out_info));
+/* out_info.type = ? */
+ out_info.line = port - isi_ports;
+ out_info.port = port->card->base;
+ out_info.irq = port->card->irq;
+ out_info.flags = port->port.flags;
+/* out_info.baud_base = ? */
+ out_info.close_delay = port->port.close_delay;
+ out_info.closing_wait = port->port.closing_wait;
+ mutex_unlock(&port->port.mutex);
+ if (copy_to_user(info, &out_info, sizeof(out_info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int isicom_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct isi_port *port = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ return isicom_get_serial_info(port, argp);
+
+ case TIOCSSERIAL:
+ return isicom_set_serial_info(tty, argp);
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+/* set_termios et all */
+static void isicom_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
+{
+ struct isi_port *port = tty->driver_data;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
+ return;
+
+ if (tty->termios.c_cflag == old_termios->c_cflag &&
+ tty->termios.c_iflag == old_termios->c_iflag)
+ return;
+
+ spin_lock_irqsave(&port->card->card_lock, flags);
+ isicom_config_port(tty);
+ spin_unlock_irqrestore(&port->card->card_lock, flags);
+
+ if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
+ tty->hw_stopped = 0;
+ isicom_start(tty);
+ }
+}
+
+/* throttle et all */
+static void isicom_throttle(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
+ return;
+
+ /* tell the card that this port cannot handle any more data for now */
+ card->port_status &= ~(1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+}
+
+/* unthrottle et all */
+static void isicom_unthrottle(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
+ return;
+
+ /* tell the card that this port is ready to accept more data */
+ card->port_status |= (1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+}
+
+/* stop et all */
+static void isicom_stop(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
+ return;
+
+ /* this tells the transmitter not to consider this port for
+ data output to the card. */
+ port->status &= ~ISI_TXOK;
+}
+
+/* start et all */
+static void isicom_start(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_start"))
+ return;
+
+ /* this tells the transmitter to consider this port for
+ data output to the card. */
+ port->status |= ISI_TXOK;
+}
+
+static void isicom_hangup(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
+ return;
+ tty_port_hangup(&port->port);
+}
+
+
+/*
+ * Driver init and deinit functions
+ */
+
+static const struct tty_operations isicom_ops = {
+ .open = isicom_open,
+ .close = isicom_close,
+ .write = isicom_write,
+ .put_char = isicom_put_char,
+ .flush_chars = isicom_flush_chars,
+ .write_room = isicom_write_room,
+ .chars_in_buffer = isicom_chars_in_buffer,
+ .ioctl = isicom_ioctl,
+ .set_termios = isicom_set_termios,
+ .throttle = isicom_throttle,
+ .unthrottle = isicom_unthrottle,
+ .stop = isicom_stop,
+ .start = isicom_start,
+ .hangup = isicom_hangup,
+ .flush_buffer = isicom_flush_buffer,
+ .tiocmget = isicom_tiocmget,
+ .tiocmset = isicom_tiocmset,
+ .break_ctl = isicom_send_break,
+};
+
+static const struct tty_port_operations isicom_port_ops = {
+ .carrier_raised = isicom_carrier_raised,
+ .dtr_rts = isicom_dtr_rts,
+ .activate = isicom_activate,
+ .shutdown = isicom_shutdown,
+};
+
+static int reset_card(struct pci_dev *pdev,
+ const unsigned int card, unsigned int *signature)
+{
+ struct isi_board *board = pci_get_drvdata(pdev);
+ unsigned long base = board->base;
+ unsigned int sig, portcount = 0;
+ int retval = 0;
+
+ dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
+ base);
+
+ inw(base + 0x8);
+
+ msleep(10);
+
+ outw(0, base + 0x8); /* Reset */
+
+ msleep(1000);
+
+ sig = inw(base + 0x4) & 0xff;
+
+ if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
+ sig != 0xee) {
+ dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
+ "bad I/O Port Address 0x%lx).\n", card + 1, base);
+ dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
+ retval = -EIO;
+ goto end;
+ }
+
+ msleep(10);
+
+ portcount = inw(base + 0x2);
+ if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
+ portcount != 8 && portcount != 16)) {
+ dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
+ card + 1);
+ retval = -EIO;
+ goto end;
+ }
+
+ switch (sig) {
+ case 0xa5:
+ case 0xbb:
+ case 0xdd:
+ board->port_count = (portcount == 4) ? 4 : 8;
+ board->shift_count = 12;
+ break;
+ case 0xcc:
+ case 0xee:
+ board->port_count = 16;
+ board->shift_count = 11;
+ break;
+ }
+ dev_info(&pdev->dev, "-Done\n");
+ *signature = sig;
+
+end:
+ return retval;
+}
+
+static int load_firmware(struct pci_dev *pdev,
+ const unsigned int index, const unsigned int signature)
+{
+ struct isi_board *board = pci_get_drvdata(pdev);
+ const struct firmware *fw;
+ unsigned long base = board->base;
+ unsigned int a;
+ u16 word_count, status;
+ int retval = -EIO;
+ char *name;
+ u8 *data;
+
+ struct stframe {
+ u16 addr;
+ u16 count;
+ u8 data[0];
+ } *frame;
+
+ switch (signature) {
+ case 0xa5:
+ name = "isi608.bin";
+ break;
+ case 0xbb:
+ name = "isi608em.bin";
+ break;
+ case 0xcc:
+ name = "isi616em.bin";
+ break;
+ case 0xdd:
+ name = "isi4608.bin";
+ break;
+ case 0xee:
+ name = "isi4616.bin";
+ break;
+ default:
+ dev_err(&pdev->dev, "Unknown signature.\n");
+ goto end;
+ }
+
+ retval = request_firmware(&fw, name, &pdev->dev);
+ if (retval)
+ goto end;
+
+ retval = -EIO;
+
+ for (frame = (struct stframe *)fw->data;
+ frame < (struct stframe *)(fw->data + fw->size);
+ frame = (struct stframe *)((u8 *)(frame + 1) +
+ frame->count)) {
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ outw(0xf0, base); /* start upload sequence */
+ outw(0x00, base);
+ outw(frame->addr, base); /* lsb of address */
+
+ word_count = frame->count / 2 + frame->count % 2;
+ outw(word_count, base);
+ InterruptTheCard(base);
+
+ udelay(100); /* 0x2f */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_warn(&pdev->dev, "Card%d rejected load header:\n"
+ "Address:0x%x\n"
+ "Count:0x%x\n"
+ "Status:0x%x\n",
+ index + 1, frame->addr, frame->count, status);
+ goto errrelfw;
+ }
+ outsw(base, frame->data, word_count);
+
+ InterruptTheCard(base);
+
+ udelay(50); /* 0x0f */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_err(&pdev->dev, "Card%d got out of sync.Card "
+ "Status:0x%x\n", index + 1, status);
+ goto errrelfw;
+ }
+ }
+
+/* XXX: should we test it by reading it back and comparing with original like
+ * in load firmware package? */
+ for (frame = (struct stframe *)fw->data;
+ frame < (struct stframe *)(fw->data + fw->size);
+ frame = (struct stframe *)((u8 *)(frame + 1) +
+ frame->count)) {
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ outw(0xf1, base); /* start download sequence */
+ outw(0x00, base);
+ outw(frame->addr, base); /* lsb of address */
+
+ word_count = (frame->count >> 1) + frame->count % 2;
+ outw(word_count + 1, base);
+ InterruptTheCard(base);
+
+ udelay(50); /* 0xf */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
+ "Address:0x%x\n"
+ "Count:0x%x\n"
+ "Status: 0x%x\n",
+ index + 1, frame->addr, frame->count, status);
+ goto errrelfw;
+ }
+
+ data = kmalloc_array(word_count, 2, GFP_KERNEL);
+ if (data == NULL) {
+ dev_err(&pdev->dev, "Card%d, firmware upload "
+ "failed, not enough memory\n", index + 1);
+ goto errrelfw;
+ }
+ inw(base);
+ insw(base, data, word_count);
+ InterruptTheCard(base);
+
+ for (a = 0; a < frame->count; a++)
+ if (data[a] != frame->data[a]) {
+ kfree(data);
+ dev_err(&pdev->dev, "Card%d, firmware upload "
+ "failed\n", index + 1);
+ goto errrelfw;
+ }
+ kfree(data);
+
+ udelay(50); /* 0xf */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_err(&pdev->dev, "Card%d verify got out of sync. "
+ "Card Status:0x%x\n", index + 1, status);
+ goto errrelfw;
+ }
+ }
+
+ /* xfer ctrl */
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ outw(0xf2, base);
+ outw(0x800, base);
+ outw(0x0, base);
+ outw(0x0, base);
+ InterruptTheCard(base);
+ outw(0x0, base + 0x4); /* for ISI4608 cards */
+
+ board->status |= FIRMWARE_LOADED;
+ retval = 0;
+
+errrelfw:
+ release_firmware(fw);
+end:
+ return retval;
+}
+
+/*
+ * Insmod can set static symbols so keep these static
+ */
+static unsigned int card_count;
+
+static int isicom_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ unsigned int uninitialized_var(signature), index;
+ int retval = -EPERM;
+ struct isi_board *board = NULL;
+
+ if (card_count >= BOARD_COUNT)
+ goto err;
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "failed to enable\n");
+ goto err;
+ }
+
+ dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
+
+ /* allot the first empty slot in the array */
+ for (index = 0; index < BOARD_COUNT; index++) {
+ if (isi_card[index].base == 0) {
+ board = &isi_card[index];
+ break;
+ }
+ }
+ if (index == BOARD_COUNT) {
+ retval = -ENODEV;
+ goto err_disable;
+ }
+
+ board->index = index;
+ board->base = pci_resource_start(pdev, 3);
+ board->irq = pdev->irq;
+ card_count++;
+
+ pci_set_drvdata(pdev, board);
+
+ retval = pci_request_region(pdev, 3, ISICOM_NAME);
+ if (retval) {
+ dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
+ "will be disabled.\n", board->base, board->base + 15,
+ index + 1);
+ retval = -EBUSY;
+ goto errdec;
+ }
+
+ retval = request_irq(board->irq, isicom_interrupt,
+ IRQF_SHARED, ISICOM_NAME, board);
+ if (retval < 0) {
+ dev_err(&pdev->dev, "Could not install handler at Irq %d. "
+ "Card%d will be disabled.\n", board->irq, index + 1);
+ goto errunrr;
+ }
+
+ retval = reset_card(pdev, index, &signature);
+ if (retval < 0)
+ goto errunri;
+
+ retval = load_firmware(pdev, index, signature);
+ if (retval < 0)
+ goto errunri;
+
+ for (index = 0; index < board->port_count; index++) {
+ struct tty_port *tport = &board->ports[index].port;
+ tty_port_init(tport);
+ tport->ops = &isicom_port_ops;
+ tport->close_delay = 50 * HZ/100;
+ tport->closing_wait = 3000 * HZ/100;
+ tty_port_register_device(tport, isicom_normal,
+ board->index * 16 + index, &pdev->dev);
+ }
+
+ return 0;
+
+errunri:
+ free_irq(board->irq, board);
+errunrr:
+ pci_release_region(pdev, 3);
+errdec:
+ board->base = 0;
+ card_count--;
+err_disable:
+ pci_disable_device(pdev);
+err:
+ return retval;
+}
+
+static void isicom_remove(struct pci_dev *pdev)
+{
+ struct isi_board *board = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ for (i = 0; i < board->port_count; i++) {
+ tty_unregister_device(isicom_normal, board->index * 16 + i);
+ tty_port_destroy(&board->ports[i].port);
+ }
+
+ free_irq(board->irq, board);
+ pci_release_region(pdev, 3);
+ board->base = 0;
+ card_count--;
+ pci_disable_device(pdev);
+}
+
+static int __init isicom_init(void)
+{
+ int retval, idx, channel;
+ struct isi_port *port;
+
+ for (idx = 0; idx < BOARD_COUNT; idx++) {
+ port = &isi_ports[idx * 16];
+ isi_card[idx].ports = port;
+ spin_lock_init(&isi_card[idx].card_lock);
+ for (channel = 0; channel < 16; channel++, port++) {
+ port->magic = ISICOM_MAGIC;
+ port->card = &isi_card[idx];
+ port->channel = channel;
+ port->status = 0;
+ /* . . . */
+ }
+ isi_card[idx].base = 0;
+ isi_card[idx].irq = 0;
+ }
+
+ /* tty driver structure initialization */
+ isicom_normal = alloc_tty_driver(PORT_COUNT);
+ if (!isicom_normal) {
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ isicom_normal->name = "ttyM";
+ isicom_normal->major = ISICOM_NMAJOR;
+ isicom_normal->minor_start = 0;
+ isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
+ isicom_normal->subtype = SERIAL_TYPE_NORMAL;
+ isicom_normal->init_termios = tty_std_termios;
+ isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
+ CLOCAL;
+ isicom_normal->flags = TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
+ tty_set_operations(isicom_normal, &isicom_ops);
+
+ retval = tty_register_driver(isicom_normal);
+ if (retval) {
+ pr_debug("Couldn't register the dialin driver\n");
+ goto err_puttty;
+ }
+
+ retval = pci_register_driver(&isicom_driver);
+ if (retval < 0) {
+ pr_err("Unable to register pci driver.\n");
+ goto err_unrtty;
+ }
+
+ mod_timer(&tx, jiffies + 1);
+
+ return 0;
+err_unrtty:
+ tty_unregister_driver(isicom_normal);
+err_puttty:
+ put_tty_driver(isicom_normal);
+error:
+ return retval;
+}
+
+static void __exit isicom_exit(void)
+{
+ del_timer_sync(&tx);
+
+ pci_unregister_driver(&isicom_driver);
+ tty_unregister_driver(isicom_normal);
+ put_tty_driver(isicom_normal);
+}
+
+module_init(isicom_init);
+module_exit(isicom_exit);
+
+MODULE_AUTHOR("MultiTech");
+MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("isi608.bin");
+MODULE_FIRMWARE("isi608em.bin");
+MODULE_FIRMWARE("isi616em.bin");
+MODULE_FIRMWARE("isi4608.bin");
+MODULE_FIRMWARE("isi4616.bin");