v4.19.13 snapshot.
diff --git a/drivers/net/wan/hd64572.c b/drivers/net/wan/hd64572.c
new file mode 100644
index 0000000..cff0cfa
--- /dev/null
+++ b/drivers/net/wan/hd64572.c
@@ -0,0 +1,639 @@
+/*
+ * Hitachi (now Renesas) SCA-II HD64572 driver for Linux
+ *
+ * Copyright (C) 1998-2008 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * Source of information: HD64572 SCA-II User's Manual
+ *
+ * We use the following SCA memory map:
+ *
+ * Packet buffer descriptor rings - starting from card->rambase:
+ * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring
+ * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring
+ * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used)
+ * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used)
+ *
+ * Packet data buffers - starting from card->rambase + buff_offset:
+ * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers
+ * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers
+ * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used)
+ * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used)
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/hdlc.h>
+#include <linux/in.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include "hd64572.h"
+
+#define NAPI_WEIGHT 16
+
+#define get_msci(port) (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET)
+#define get_dmac_rx(port) (port->chan ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
+#define get_dmac_tx(port) (port->chan ? DMAC1TX_OFFSET : DMAC0TX_OFFSET)
+
+#define sca_in(reg, card) readb(card->scabase + (reg))
+#define sca_out(value, reg, card) writeb(value, card->scabase + (reg))
+#define sca_inw(reg, card) readw(card->scabase + (reg))
+#define sca_outw(value, reg, card) writew(value, card->scabase + (reg))
+#define sca_inl(reg, card) readl(card->scabase + (reg))
+#define sca_outl(value, reg, card) writel(value, card->scabase + (reg))
+
+static int sca_poll(struct napi_struct *napi, int budget);
+
+static inline port_t* dev_to_port(struct net_device *dev)
+{
+ return dev_to_hdlc(dev)->priv;
+}
+
+static inline void enable_intr(port_t *port)
+{
+ /* enable DMIB and MSCI RXINTA interrupts */
+ sca_outl(sca_inl(IER0, port->card) |
+ (port->chan ? 0x08002200 : 0x00080022), IER0, port->card);
+}
+
+static inline void disable_intr(port_t *port)
+{
+ sca_outl(sca_inl(IER0, port->card) &
+ (port->chan ? 0x00FF00FF : 0xFF00FF00), IER0, port->card);
+}
+
+static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
+{
+ u16 rx_buffs = port->card->rx_ring_buffers;
+ u16 tx_buffs = port->card->tx_ring_buffers;
+
+ desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc.
+ return port->chan * (rx_buffs + tx_buffs) + transmit * rx_buffs + desc;
+}
+
+
+static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
+{
+ /* Descriptor offset always fits in 16 bits */
+ return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc);
+}
+
+
+static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
+ int transmit)
+{
+ return (pkt_desc __iomem *)(port->card->rambase +
+ desc_offset(port, desc, transmit));
+}
+
+
+static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
+{
+ return port->card->buff_offset +
+ desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU;
+}
+
+
+static inline void sca_set_carrier(port_t *port)
+{
+ if (!(sca_in(get_msci(port) + ST3, port->card) & ST3_DCD)) {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier on\n",
+ port->netdev.name);
+#endif
+ netif_carrier_on(port->netdev);
+ } else {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier off\n",
+ port->netdev.name);
+#endif
+ netif_carrier_off(port->netdev);
+ }
+}
+
+
+static void sca_init_port(port_t *port)
+{
+ card_t *card = port->card;
+ u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
+ int transmit, i;
+
+ port->rxin = 0;
+ port->txin = 0;
+ port->txlast = 0;
+
+ for (transmit = 0; transmit < 2; transmit++) {
+ u16 buffs = transmit ? card->tx_ring_buffers
+ : card->rx_ring_buffers;
+
+ for (i = 0; i < buffs; i++) {
+ pkt_desc __iomem *desc = desc_address(port, i, transmit);
+ u16 chain_off = desc_offset(port, i + 1, transmit);
+ u32 buff_off = buffer_offset(port, i, transmit);
+
+ writel(chain_off, &desc->cp);
+ writel(buff_off, &desc->bp);
+ writew(0, &desc->len);
+ writeb(0, &desc->stat);
+ }
+ }
+
+ /* DMA disable - to halt state */
+ sca_out(0, DSR_RX(port->chan), card);
+ sca_out(0, DSR_TX(port->chan), card);
+
+ /* software ABORT - to initial state */
+ sca_out(DCR_ABORT, DCR_RX(port->chan), card);
+ sca_out(DCR_ABORT, DCR_TX(port->chan), card);
+
+ /* current desc addr */
+ sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card);
+ sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0),
+ dmac_rx + EDAL, card);
+ sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card);
+ sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card);
+
+ /* clear frame end interrupt counter */
+ sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
+ sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
+
+ /* Receive */
+ sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
+ sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
+ sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
+ sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
+
+ /* Transmit */
+ sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
+ sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
+
+ sca_set_carrier(port);
+ netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
+}
+
+
+/* MSCI interrupt service */
+static inline void sca_msci_intr(port_t *port)
+{
+ u16 msci = get_msci(port);
+ card_t* card = port->card;
+
+ if (sca_in(msci + ST1, card) & ST1_CDCD) {
+ /* Reset MSCI CDCD status bit */
+ sca_out(ST1_CDCD, msci + ST1, card);
+ sca_set_carrier(port);
+ }
+}
+
+
+static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
+ u16 rxin)
+{
+ struct net_device *dev = port->netdev;
+ struct sk_buff *skb;
+ u16 len;
+ u32 buff;
+
+ len = readw(&desc->len);
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ buff = buffer_offset(port, rxin, 0);
+ memcpy_fromio(skb->data, card->rambase + buff, len);
+
+ skb_put(skb, len);
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ skb->protocol = hdlc_type_trans(skb, dev);
+ netif_receive_skb(skb);
+}
+
+
+/* Receive DMA service */
+static inline int sca_rx_done(port_t *port, int budget)
+{
+ struct net_device *dev = port->netdev;
+ u16 dmac = get_dmac_rx(port);
+ card_t *card = port->card;
+ u8 stat = sca_in(DSR_RX(port->chan), card); /* read DMA Status */
+ int received = 0;
+
+ /* Reset DSR status bits */
+ sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
+ DSR_RX(port->chan), card);
+
+ if (stat & DSR_BOF)
+ /* Dropped one or more frames */
+ dev->stats.rx_over_errors++;
+
+ while (received < budget) {
+ u32 desc_off = desc_offset(port, port->rxin, 0);
+ pkt_desc __iomem *desc;
+ u32 cda = sca_inl(dmac + CDAL, card);
+
+ if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
+ break; /* No frame received */
+
+ desc = desc_address(port, port->rxin, 0);
+ stat = readb(&desc->stat);
+ if (!(stat & ST_RX_EOM))
+ port->rxpart = 1; /* partial frame received */
+ else if ((stat & ST_ERROR_MASK) || port->rxpart) {
+ dev->stats.rx_errors++;
+ if (stat & ST_RX_OVERRUN)
+ dev->stats.rx_fifo_errors++;
+ else if ((stat & (ST_RX_SHORT | ST_RX_ABORT |
+ ST_RX_RESBIT)) || port->rxpart)
+ dev->stats.rx_frame_errors++;
+ else if (stat & ST_RX_CRC)
+ dev->stats.rx_crc_errors++;
+ if (stat & ST_RX_EOM)
+ port->rxpart = 0; /* received last fragment */
+ } else {
+ sca_rx(card, port, desc, port->rxin);
+ received++;
+ }
+
+ /* Set new error descriptor address */
+ sca_outl(desc_off, dmac + EDAL, card);
+ port->rxin = (port->rxin + 1) % card->rx_ring_buffers;
+ }
+
+ /* make sure RX DMA is enabled */
+ sca_out(DSR_DE, DSR_RX(port->chan), card);
+ return received;
+}
+
+
+/* Transmit DMA service */
+static inline void sca_tx_done(port_t *port)
+{
+ struct net_device *dev = port->netdev;
+ card_t* card = port->card;
+ u8 stat;
+ unsigned count = 0;
+
+ spin_lock(&port->lock);
+
+ stat = sca_in(DSR_TX(port->chan), card); /* read DMA Status */
+
+ /* Reset DSR status bits */
+ sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
+ DSR_TX(port->chan), card);
+
+ while (1) {
+ pkt_desc __iomem *desc = desc_address(port, port->txlast, 1);
+ u8 stat = readb(&desc->stat);
+
+ if (!(stat & ST_TX_OWNRSHP))
+ break; /* not yet transmitted */
+ if (stat & ST_TX_UNDRRUN) {
+ dev->stats.tx_errors++;
+ dev->stats.tx_fifo_errors++;
+ } else {
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += readw(&desc->len);
+ }
+ writeb(0, &desc->stat); /* Free descriptor */
+ count++;
+ port->txlast = (port->txlast + 1) % card->tx_ring_buffers;
+ }
+
+ if (count)
+ netif_wake_queue(dev);
+ spin_unlock(&port->lock);
+}
+
+
+static int sca_poll(struct napi_struct *napi, int budget)
+{
+ port_t *port = container_of(napi, port_t, napi);
+ u32 isr0 = sca_inl(ISR0, port->card);
+ int received = 0;
+
+ if (isr0 & (port->chan ? 0x08000000 : 0x00080000))
+ sca_msci_intr(port);
+
+ if (isr0 & (port->chan ? 0x00002000 : 0x00000020))
+ sca_tx_done(port);
+
+ if (isr0 & (port->chan ? 0x00000200 : 0x00000002))
+ received = sca_rx_done(port, budget);
+
+ if (received < budget) {
+ napi_complete_done(napi, received);
+ enable_intr(port);
+ }
+
+ return received;
+}
+
+static irqreturn_t sca_intr(int irq, void *dev_id)
+{
+ card_t *card = dev_id;
+ u32 isr0 = sca_inl(ISR0, card);
+ int i, handled = 0;
+
+ for (i = 0; i < 2; i++) {
+ port_t *port = get_port(card, i);
+ if (port && (isr0 & (i ? 0x08002200 : 0x00080022))) {
+ handled = 1;
+ disable_intr(port);
+ napi_schedule(&port->napi);
+ }
+ }
+
+ return IRQ_RETVAL(handled);
+}
+
+
+static void sca_set_port(port_t *port)
+{
+ card_t* card = port->card;
+ u16 msci = get_msci(port);
+ u8 md2 = sca_in(msci + MD2, card);
+ unsigned int tmc, br = 10, brv = 1024;
+
+
+ if (port->settings.clock_rate > 0) {
+ /* Try lower br for better accuracy*/
+ do {
+ br--;
+ brv >>= 1; /* brv = 2^9 = 512 max in specs */
+
+ /* Baud Rate = CLOCK_BASE / TMC / 2^BR */
+ tmc = CLOCK_BASE / brv / port->settings.clock_rate;
+ }while (br > 1 && tmc <= 128);
+
+ if (tmc < 1) {
+ tmc = 1;
+ br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */
+ brv = 1;
+ } else if (tmc > 255)
+ tmc = 256; /* tmc=0 means 256 - low baud rates */
+
+ port->settings.clock_rate = CLOCK_BASE / brv / tmc;
+ } else {
+ br = 9; /* Minimum clock rate */
+ tmc = 256; /* 8bit = 0 */
+ port->settings.clock_rate = CLOCK_BASE / (256 * 512);
+ }
+
+ port->rxs = (port->rxs & ~CLK_BRG_MASK) | br;
+ port->txs = (port->txs & ~CLK_BRG_MASK) | br;
+ port->tmc = tmc;
+
+ /* baud divisor - time constant*/
+ sca_out(port->tmc, msci + TMCR, card);
+ sca_out(port->tmc, msci + TMCT, card);
+
+ /* Set BRG bits */
+ sca_out(port->rxs, msci + RXS, card);
+ sca_out(port->txs, msci + TXS, card);
+
+ if (port->settings.loopback)
+ md2 |= MD2_LOOPBACK;
+ else
+ md2 &= ~MD2_LOOPBACK;
+
+ sca_out(md2, msci + MD2, card);
+
+}
+
+
+static void sca_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t* card = port->card;
+ u16 msci = get_msci(port);
+ u8 md0, md2;
+
+ switch(port->encoding) {
+ case ENCODING_NRZ: md2 = MD2_NRZ; break;
+ case ENCODING_NRZI: md2 = MD2_NRZI; break;
+ case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break;
+ case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break;
+ default: md2 = MD2_MANCHESTER;
+ }
+
+ if (port->settings.loopback)
+ md2 |= MD2_LOOPBACK;
+
+ switch(port->parity) {
+ case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break;
+ case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break;
+ case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break;
+ case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break;
+ default: md0 = MD0_HDLC | MD0_CRC_NONE;
+ }
+
+ sca_out(CMD_RESET, msci + CMD, card);
+ sca_out(md0, msci + MD0, card);
+ sca_out(0x00, msci + MD1, card); /* no address field check */
+ sca_out(md2, msci + MD2, card);
+ sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */
+ /* Skip the rest of underrun frame */
+ sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card);
+ sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */
+ sca_out(0x3C, msci + TFS, card); /* +1 = TX start */
+ sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */
+ sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */
+ sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/
+
+/* We're using the following interrupts:
+ - RXINTA (DCD changes only)
+ - DMIB (EOM - single frame transfer complete)
+*/
+ sca_outl(IE0_RXINTA | IE0_CDCD, msci + IE0, card);
+
+ sca_out(port->tmc, msci + TMCR, card);
+ sca_out(port->tmc, msci + TMCT, card);
+ sca_out(port->rxs, msci + RXS, card);
+ sca_out(port->txs, msci + TXS, card);
+ sca_out(CMD_TX_ENABLE, msci + CMD, card);
+ sca_out(CMD_RX_ENABLE, msci + CMD, card);
+
+ sca_set_carrier(port);
+ enable_intr(port);
+ napi_enable(&port->napi);
+ netif_start_queue(dev);
+}
+
+
+static void sca_close(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+
+ /* reset channel */
+ sca_out(CMD_RESET, get_msci(port) + CMD, port->card);
+ disable_intr(port);
+ napi_disable(&port->napi);
+ netif_stop_queue(dev);
+}
+
+
+static int sca_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ if (encoding != ENCODING_NRZ &&
+ encoding != ENCODING_NRZI &&
+ encoding != ENCODING_FM_MARK &&
+ encoding != ENCODING_FM_SPACE &&
+ encoding != ENCODING_MANCHESTER)
+ return -EINVAL;
+
+ if (parity != PARITY_NONE &&
+ parity != PARITY_CRC16_PR0 &&
+ parity != PARITY_CRC16_PR1 &&
+ parity != PARITY_CRC32_PR1_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT)
+ return -EINVAL;
+
+ dev_to_port(dev)->encoding = encoding;
+ dev_to_port(dev)->parity = parity;
+ return 0;
+}
+
+
+#ifdef DEBUG_RINGS
+static void sca_dump_rings(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port->card;
+ u16 cnt;
+
+ printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive",
+ sca_inl(get_dmac_rx(port) + CDAL, card),
+ sca_inl(get_dmac_rx(port) + EDAL, card),
+ sca_in(DSR_RX(port->chan), card), port->rxin,
+ sca_in(DSR_RX(port->chan), card) & DSR_DE ? "" : "in");
+ for (cnt = 0; cnt < port->card->rx_ring_buffers; cnt++)
+ pr_cont(" %02X", readb(&(desc_address(port, cnt, 0)->stat)));
+ pr_cont("\n");
+
+ printk(KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u "
+ "last=%u %sactive",
+ sca_inl(get_dmac_tx(port) + CDAL, card),
+ sca_inl(get_dmac_tx(port) + EDAL, card),
+ sca_in(DSR_TX(port->chan), card), port->txin, port->txlast,
+ sca_in(DSR_TX(port->chan), card) & DSR_DE ? "" : "in");
+
+ for (cnt = 0; cnt < port->card->tx_ring_buffers; cnt++)
+ pr_cont(" %02X", readb(&(desc_address(port, cnt, 1)->stat)));
+ pr_cont("\n");
+
+ printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x,"
+ " ST: %02x %02x %02x %02x %02x, FST: %02x CST: %02x %02x\n",
+ sca_in(get_msci(port) + MD0, card),
+ sca_in(get_msci(port) + MD1, card),
+ sca_in(get_msci(port) + MD2, card),
+ sca_in(get_msci(port) + ST0, card),
+ sca_in(get_msci(port) + ST1, card),
+ sca_in(get_msci(port) + ST2, card),
+ sca_in(get_msci(port) + ST3, card),
+ sca_in(get_msci(port) + ST4, card),
+ sca_in(get_msci(port) + FST, card),
+ sca_in(get_msci(port) + CST0, card),
+ sca_in(get_msci(port) + CST1, card));
+
+ printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card),
+ sca_inl(ISR0, card), sca_inl(ISR1, card));
+}
+#endif /* DEBUG_RINGS */
+
+
+static netdev_tx_t sca_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port->card;
+ pkt_desc __iomem *desc;
+ u32 buff, len;
+
+ spin_lock_irq(&port->lock);
+
+ desc = desc_address(port, port->txin + 1, 1);
+ BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
+
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+
+ desc = desc_address(port, port->txin, 1);
+ buff = buffer_offset(port, port->txin, 1);
+ len = skb->len;
+ memcpy_toio(card->rambase + buff, skb->data, len);
+
+ writew(len, &desc->len);
+ writeb(ST_TX_EOM, &desc->stat);
+
+ port->txin = (port->txin + 1) % card->tx_ring_buffers;
+ sca_outl(desc_offset(port, port->txin, 1),
+ get_dmac_tx(port) + EDAL, card);
+
+ sca_out(DSR_DE, DSR_TX(port->chan), card); /* Enable TX DMA */
+
+ desc = desc_address(port, port->txin + 1, 1);
+ if (readb(&desc->stat)) /* allow 1 packet gap */
+ netif_stop_queue(dev);
+
+ spin_unlock_irq(&port->lock);
+
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+
+static u32 sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
+{
+ /* Round RAM size to 32 bits, fill from end to start */
+ u32 i = ramsize &= ~3;
+
+ do {
+ i -= 4;
+ writel(i ^ 0x12345678, rambase + i);
+ } while (i > 0);
+
+ for (i = 0; i < ramsize ; i += 4) {
+ if (readl(rambase + i) != (i ^ 0x12345678))
+ break;
+ }
+
+ return i;
+}
+
+
+static void sca_init(card_t *card, int wait_states)
+{
+ sca_out(wait_states, WCRL, card); /* Wait Control */
+ sca_out(wait_states, WCRM, card);
+ sca_out(wait_states, WCRH, card);
+
+ sca_out(0, DMER, card); /* DMA Master disable */
+ sca_out(0x03, PCR, card); /* DMA priority */
+ sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */
+ sca_out(0, DSR_TX(0), card);
+ sca_out(0, DSR_RX(1), card);
+ sca_out(0, DSR_TX(1), card);
+ sca_out(DMER_DME, DMER, card); /* DMA Master enable */
+}