--- /dev/null
+/*
+ * NCR53c406.c
+ * Low-level SCSI driver for NCR53c406a chip.
+ * Copyright (C) 1994, 1995, 1996 Normunds Saumanis (normunds@fi.ibm.com)
+ *
+ * LILO command line usage: ncr53c406a=<PORTBASE>[,<IRQ>[,<FASTPIO>]]
+ * Specify IRQ = 0 for non-interrupt driven mode.
+ * FASTPIO = 1 for fast pio mode, 0 for slow mode.
+ *
+ * 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, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ */
+
+#define NCR53C406A_DEBUG 0
+#define VERBOSE_NCR53C406A_DEBUG 0
+
+/* Set this to 1 for PIO mode (recommended) or to 0 for DMA mode */
+#define USE_PIO 1
+
+#define USE_BIOS 0
+ /* #define BIOS_ADDR 0xD8000 *//* define this if autoprobe fails */
+ /* #define PORT_BASE 0x330 *//* define this if autoprobe fails */
+ /* #define IRQ_LEV 0 *//* define this if autoprobe fails */
+#define DMA_CHAN 5 /* this is ignored if DMA is disabled */
+
+/* Set this to 0 if you encounter kernel lockups while transferring
+ * data in PIO mode */
+#define USE_FAST_PIO 1
+
+/* ============= End of user configurable parameters ============= */
+
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+
+/* ============================================================= */
+
+#define WATCHDOG 5000000
+
+#define SYNC_MODE 0 /* Synchronous transfer mode */
+
+#ifdef DEBUG
+#undef NCR53C406A_DEBUG
+#define NCR53C406A_DEBUG 1
+#endif
+
+#if USE_PIO
+#define USE_DMA 0
+#else
+#define USE_DMA 1
+#endif
+
+/* Default configuration */
+#define C1_IMG 0x07 /* ID=7 */
+#define C2_IMG 0x48 /* FE SCSI2 */
+#if USE_DMA
+#define C3_IMG 0x21 /* CDB TE */
+#else
+#define C3_IMG 0x20 /* CDB */
+#endif
+#define C4_IMG 0x04 /* ANE */
+#define C5_IMG 0xb6 /* AA PI SIE POL */
+
+#define REG0 (outb(C4_IMG, CONFIG4))
+#define REG1 (outb(C5_IMG, CONFIG5))
+
+#if NCR53C406A_DEBUG
+#define DEB(x) x
+#else
+#define DEB(x)
+#endif
+
+#if VERBOSE_NCR53C406A_DEBUG
+#define VDEB(x) x
+#else
+#define VDEB(x)
+#endif
+
+#define LOAD_DMA_COUNT(count) \
+ outb(count & 0xff, TC_LSB); \
+ outb((count >> 8) & 0xff, TC_MSB); \
+ outb((count >> 16) & 0xff, TC_HIGH);
+
+/* Chip commands */
+#define DMA_OP 0x80
+
+#define SCSI_NOP 0x00
+#define FLUSH_FIFO 0x01
+#define CHIP_RESET 0x02
+#define SCSI_RESET 0x03
+#define RESELECT 0x40
+#define SELECT_NO_ATN 0x41
+#define SELECT_ATN 0x42
+#define SELECT_ATN_STOP 0x43
+#define ENABLE_SEL 0x44
+#define DISABLE_SEL 0x45
+#define SELECT_ATN3 0x46
+#define RESELECT3 0x47
+#define TRANSFER_INFO 0x10
+#define INIT_CMD_COMPLETE 0x11
+#define MSG_ACCEPT 0x12
+#define TRANSFER_PAD 0x18
+#define SET_ATN 0x1a
+#define RESET_ATN 0x1b
+#define SEND_MSG 0x20
+#define SEND_STATUS 0x21
+#define SEND_DATA 0x22
+#define DISCONN_SEQ 0x23
+#define TERMINATE_SEQ 0x24
+#define TARG_CMD_COMPLETE 0x25
+#define DISCONN 0x27
+#define RECV_MSG 0x28
+#define RECV_CMD 0x29
+#define RECV_DATA 0x2a
+#define RECV_CMD_SEQ 0x2b
+#define TARGET_ABORT_DMA 0x04
+
+/*----------------------------------------------------------------*/
+/* the following will set the monitor border color (useful to find
+ where something crashed or gets stuck at */
+/* 1 = blue
+ 2 = green
+ 3 = cyan
+ 4 = red
+ 5 = magenta
+ 6 = yellow
+ 7 = white
+*/
+
+#if NCR53C406A_DEBUG
+#define rtrc(i) {inb(0x3da);outb(0x31,0x3c0);outb((i),0x3c0);}
+#else
+#define rtrc(i) {}
+#endif
+/*----------------------------------------------------------------*/
+
+enum Phase {
+ idle,
+ data_out,
+ data_in,
+ command_ph,
+ status_ph,
+ message_out,
+ message_in
+};
+
+/* Static function prototypes */
+static void NCR53c406a_intr(void *);
+static irqreturn_t do_NCR53c406a_intr(int, void *);
+static void chip_init(void);
+static void calc_port_addr(void);
+#ifndef IRQ_LEV
+static int irq_probe(void);
+#endif
+
+/* ================================================================= */
+
+#if USE_BIOS
+static void *bios_base;
+#endif
+
+#ifdef PORT_BASE
+static int port_base = PORT_BASE;
+#else
+static int port_base;
+#endif
+
+#ifdef IRQ_LEV
+static int irq_level = IRQ_LEV;
+#else
+static int irq_level = -1; /* 0 is 'no irq', so use -1 for 'uninitialized' */
+#endif
+
+#if USE_DMA
+static int dma_chan;
+#endif
+
+#if USE_PIO
+static int fast_pio = USE_FAST_PIO;
+#endif
+
+static Scsi_Cmnd *current_SC;
+static char info_msg[256];
+
+/* ================================================================= */
+
+/* possible BIOS locations */
+#if USE_BIOS
+static void *addresses[] = {
+ (void *) 0xd8000,
+ (void *) 0xc8000
+};
+#define ADDRESS_COUNT ARRAY_SIZE(addresses)
+#endif /* USE_BIOS */
+
+/* possible i/o port addresses */
+static unsigned short ports[] = { 0x230, 0x330, 0x280, 0x290, 0x330, 0x340, 0x300, 0x310, 0x348, 0x350 };
+#define PORT_COUNT ARRAY_SIZE(ports)
+
+#ifndef MODULE
+/* possible interrupt channels */
+static unsigned short intrs[] = { 10, 11, 12, 15 };
+#define INTR_COUNT ARRAY_SIZE(intrs)
+#endif /* !MODULE */
+
+/* signatures for NCR 53c406a based controllers */
+#if USE_BIOS
+struct signature {
+ char *signature;
+ int sig_offset;
+ int sig_length;
+} signatures[] __initdata = {
+ /* 1 2 3 4 5 6 */
+ /* 123456789012345678901234567890123456789012345678901234567890 */
+ {
+"Copyright (C) Acculogic, Inc.\r\n2.8M Diskette Extension Bios ver 4.04.03 03/01/1993", 61, 82},};
+
+#define SIGNATURE_COUNT ARRAY_SIZE(signatures)
+#endif /* USE_BIOS */
+
+/* ============================================================ */
+
+/* Control Register Set 0 */
+static int TC_LSB; /* transfer counter lsb */
+static int TC_MSB; /* transfer counter msb */
+static int SCSI_FIFO; /* scsi fifo register */
+static int CMD_REG; /* command register */
+static int STAT_REG; /* status register */
+static int DEST_ID; /* selection/reselection bus id */
+static int INT_REG; /* interrupt status register */
+static int SRTIMOUT; /* select/reselect timeout reg */
+static int SEQ_REG; /* sequence step register */
+static int SYNCPRD; /* synchronous transfer period */
+static int FIFO_FLAGS; /* indicates # of bytes in fifo */
+static int SYNCOFF; /* synchronous offset register */
+static int CONFIG1; /* configuration register */
+static int CLKCONV; /* clock conversion reg */
+ /*static int TESTREG;*//* test mode register */
+static int CONFIG2; /* Configuration 2 Register */
+static int CONFIG3; /* Configuration 3 Register */
+static int CONFIG4; /* Configuration 4 Register */
+static int TC_HIGH; /* Transfer Counter High */
+ /*static int FIFO_BOTTOM;*//* Reserve FIFO byte register */
+
+/* Control Register Set 1 */
+ /*static int JUMPER_SENSE;*//* Jumper sense port reg (r/w) */
+ /*static int SRAM_PTR;*//* SRAM address pointer reg (r/w) */
+ /*static int SRAM_DATA;*//* SRAM data register (r/w) */
+static int PIO_FIFO; /* PIO FIFO registers (r/w) */
+ /*static int PIO_FIFO1;*//* */
+ /*static int PIO_FIFO2;*//* */
+ /*static int PIO_FIFO3;*//* */
+static int PIO_STATUS; /* PIO status (r/w) */
+ /*static int ATA_CMD;*//* ATA command/status reg (r/w) */
+ /*static int ATA_ERR;*//* ATA features/error register (r/w) */
+static int PIO_FLAG; /* PIO flag interrupt enable (r/w) */
+static int CONFIG5; /* Configuration 5 register (r/w) */
+ /*static int SIGNATURE;*//* Signature Register (r) */
+ /*static int CONFIG6;*//* Configuration 6 register (r) */
+
+/* ============================================================== */
+
+#if USE_DMA
+static __inline__ int NCR53c406a_dma_setup(unsigned char *ptr, unsigned int count, unsigned char mode)
+{
+ unsigned limit;
+ unsigned long flags = 0;
+
+ VDEB(printk("dma: before count=%d ", count));
+ if (dma_chan <= 3) {
+ if (count > 65536)
+ count = 65536;
+ limit = 65536 - (((unsigned) ptr) & 0xFFFF);
+ } else {
+ if (count > (65536 << 1))
+ count = (65536 << 1);
+ limit = (65536 << 1) - (((unsigned) ptr) & 0x1FFFF);
+ }
+
+ if (count > limit)
+ count = limit;
+
+ VDEB(printk("after count=%d\n", count));
+ if ((count & 1) || (((unsigned) ptr) & 1))
+ panic("NCR53c406a: attempted unaligned DMA transfer\n");
+
+ flags = claim_dma_lock();
+ disable_dma(dma_chan);
+ clear_dma_ff(dma_chan);
+ set_dma_addr(dma_chan, (long) ptr);
+ set_dma_count(dma_chan, count);
+ set_dma_mode(dma_chan, mode);
+ enable_dma(dma_chan);
+ release_dma_lock(flags);
+
+ return count;
+}
+
+static __inline__ int NCR53c406a_dma_write(unsigned char *src, unsigned int count)
+{
+ return NCR53c406a_dma_setup(src, count, DMA_MODE_WRITE);
+}
+
+static __inline__ int NCR53c406a_dma_read(unsigned char *src, unsigned int count)
+{
+ return NCR53c406a_dma_setup(src, count, DMA_MODE_READ);
+}
+
+static __inline__ int NCR53c406a_dma_residual(void)
+{
+ register int tmp;
+ unsigned long flags;
+
+ flags = claim_dma_lock();
+ clear_dma_ff(dma_chan);
+ tmp = get_dma_residue(dma_chan);
+ release_dma_lock(flags);
+
+ return tmp;
+}
+#endif /* USE_DMA */
+
+#if USE_PIO
+static __inline__ int NCR53c406a_pio_read(unsigned char *request, unsigned int reqlen)
+{
+ int i;
+ int len; /* current scsi fifo size */
+
+ REG1;
+ while (reqlen) {
+ i = inb(PIO_STATUS);
+ /* VDEB(printk("pio_status=%x\n", i)); */
+ if (i & 0x80)
+ return 0;
+
+ switch (i & 0x1e) {
+ default:
+ case 0x10:
+ len = 0;
+ break;
+ case 0x0:
+ len = 1;
+ break;
+ case 0x8:
+ len = 42;
+ break;
+ case 0xc:
+ len = 84;
+ break;
+ case 0xe:
+ len = 128;
+ break;
+ }
+
+ if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
+ return 0;
+ }
+
+ if (len) {
+ if (len > reqlen)
+ len = reqlen;
+
+ if (fast_pio && len > 3) {
+ insl(PIO_FIFO, request, len >> 2);
+ request += len & 0xfc;
+ reqlen -= len & 0xfc;
+ } else {
+ while (len--) {
+ *request++ = inb(PIO_FIFO);
+ reqlen--;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+static __inline__ int NCR53c406a_pio_write(unsigned char *request, unsigned int reqlen)
+{
+ int i = 0;
+ int len; /* current scsi fifo size */
+
+ REG1;
+ while (reqlen && !(i & 0x40)) {
+ i = inb(PIO_STATUS);
+ /* VDEB(printk("pio_status=%x\n", i)); */
+ if (i & 0x80) /* error */
+ return 0;
+
+ switch (i & 0x1e) {
+ case 0x10:
+ len = 128;
+ break;
+ case 0x0:
+ len = 84;
+ break;
+ case 0x8:
+ len = 42;
+ break;
+ case 0xc:
+ len = 1;
+ break;
+ default:
+ case 0xe:
+ len = 0;
+ break;
+ }
+
+ if (len) {
+ if (len > reqlen)
+ len = reqlen;
+
+ if (fast_pio && len > 3) {
+ outsl(PIO_FIFO, request, len >> 2);
+ request += len & 0xfc;
+ reqlen -= len & 0xfc;
+ } else {
+ while (len--) {
+ outb(*request++, PIO_FIFO);
+ reqlen--;
+ }
+ }
+ }
+ }
+ return 0;
+}
+#endif /* USE_PIO */
+
+static int __init NCR53c406a_detect(struct scsi_host_template * tpnt)
+{
+ int present = 0;
+ struct Scsi_Host *shpnt = NULL;
+#ifndef PORT_BASE
+ int i;
+#endif
+
+#if USE_BIOS
+ int ii, jj;
+ bios_base = 0;
+ /* look for a valid signature */
+ for (ii = 0; ii < ADDRESS_COUNT && !bios_base; ii++)
+ for (jj = 0; (jj < SIGNATURE_COUNT) && !bios_base; jj++)
+ if (!memcmp((void *) addresses[ii] + signatures[jj].sig_offset, (void *) signatures[jj].signature, (int) signatures[jj].sig_length))
+ bios_base = addresses[ii];
+
+ if (!bios_base) {
+ printk("NCR53c406a: BIOS signature not found\n");
+ return 0;
+ }
+
+ DEB(printk("NCR53c406a BIOS found at 0x%x\n", (unsigned int) bios_base);
+ );
+#endif /* USE_BIOS */
+
+#ifdef PORT_BASE
+ if (!request_region(port_base, 0x10, "NCR53c406a")) /* ports already snatched */
+ port_base = 0;
+
+#else /* autodetect */
+ if (port_base) { /* LILO override */
+ if (!request_region(port_base, 0x10, "NCR53c406a"))
+ port_base = 0;
+ } else {
+ for (i = 0; i < PORT_COUNT && !port_base; i++) {
+ if (!request_region(ports[i], 0x10, "NCR53c406a")) {
+ DEB(printk("NCR53c406a: port 0x%x in use\n", ports[i]));
+ } else {
+ VDEB(printk("NCR53c406a: port 0x%x available\n", ports[i]));
+ outb(C5_IMG, ports[i] + 0x0d); /* reg set 1 */
+ if ((inb(ports[i] + 0x0e) ^ inb(ports[i] + 0x0e)) == 7 && (inb(ports[i] + 0x0e) ^ inb(ports[i] + 0x0e)) == 7 && (inb(ports[i] + 0x0e) & 0xf8) == 0x58) {
+ port_base = ports[i];
+ VDEB(printk("NCR53c406a: Sig register valid\n"));
+ VDEB(printk("port_base=0x%x\n", port_base));
+ break;
+ }
+ release_region(ports[i], 0x10);
+ }
+ }
+ }
+#endif /* PORT_BASE */
+
+ if (!port_base) { /* no ports found */
+ printk("NCR53c406a: no available ports found\n");
+ return 0;
+ }
+
+ DEB(printk("NCR53c406a detected\n"));
+
+ calc_port_addr();
+ chip_init();
+
+#ifndef IRQ_LEV
+ if (irq_level < 0) { /* LILO override if >= 0 */
+ irq_level = irq_probe();
+ if (irq_level < 0) { /* Trouble */
+ printk("NCR53c406a: IRQ problem, irq_level=%d, giving up\n", irq_level);
+ goto err_release;
+ }
+ }
+#endif
+
+ DEB(printk("NCR53c406a: using port_base 0x%x\n", port_base));
+
+ present = 1;
+ tpnt->proc_name = "NCR53c406a";
+
+ shpnt = scsi_register(tpnt, 0);
+ if (!shpnt) {
+ printk("NCR53c406a: Unable to register host, giving up.\n");
+ goto err_release;
+ }
+
+ if (irq_level > 0) {
+ if (request_irq(irq_level, do_NCR53c406a_intr, 0, "NCR53c406a", shpnt)) {
+ printk("NCR53c406a: unable to allocate IRQ %d\n", irq_level);
+ goto err_free_scsi;
+ }
+ tpnt->can_queue = 1;
+ DEB(printk("NCR53c406a: allocated IRQ %d\n", irq_level));
+ } else if (irq_level == 0) {
+ tpnt->can_queue = 0;
+ DEB(printk("NCR53c406a: No interrupts detected\n"));
+ printk("NCR53c406a driver no longer supports polling interface\n");
+ printk("Please email linux-scsi@vger.kernel.org\n");
+
+#if USE_DMA
+ printk("NCR53c406a: No interrupts found and DMA mode defined. Giving up.\n");
+#endif /* USE_DMA */
+ goto err_free_scsi;
+ } else {
+ DEB(printk("NCR53c406a: Shouldn't get here!\n"));
+ goto err_free_scsi;
+ }
+
+#if USE_DMA
+ dma_chan = DMA_CHAN;
+ if (request_dma(dma_chan, "NCR53c406a") != 0) {
+ printk("NCR53c406a: unable to allocate DMA channel %d\n", dma_chan);
+ goto err_free_irq;
+ }
+
+ DEB(printk("Allocated DMA channel %d\n", dma_chan));
+#endif /* USE_DMA */
+
+ shpnt->irq = irq_level;
+ shpnt->io_port = port_base;
+ shpnt->n_io_port = 0x10;
+#if USE_DMA
+ shpnt->dma = dma_chan;
+#endif
+
+#if USE_DMA
+ sprintf(info_msg, "NCR53c406a at 0x%x, IRQ %d, DMA channel %d.", port_base, irq_level, dma_chan);
+#else
+ sprintf(info_msg, "NCR53c406a at 0x%x, IRQ %d, %s PIO mode.", port_base, irq_level, fast_pio ? "fast" : "slow");
+#endif
+
+ return (present);
+
+#if USE_DMA
+ err_free_irq:
+ if (irq_level)
+ free_irq(irq_level, shpnt);
+#endif
+ err_free_scsi:
+ scsi_unregister(shpnt);
+ err_release:
+ release_region(port_base, 0x10);
+ return 0;
+}
+
+static int NCR53c406a_release(struct Scsi_Host *shost)
+{
+ if (shost->irq)
+ free_irq(shost->irq, NULL);
+#if USE_DMA
+ if (shost->dma_channel != 0xff)
+ free_dma(shost->dma_channel);
+#endif
+ if (shost->io_port && shost->n_io_port)
+ release_region(shost->io_port, shost->n_io_port);
+
+ scsi_unregister(shost);
+ return 0;
+}
+
+#ifndef MODULE
+/* called from init/main.c */
+static int __init NCR53c406a_setup(char *str)
+{
+ static size_t setup_idx = 0;
+ size_t i;
+ int ints[4];
+
+ DEB(printk("NCR53c406a: Setup called\n");
+ );
+
+ if (setup_idx >= PORT_COUNT - 1) {
+ printk("NCR53c406a: Setup called too many times. Bad LILO params?\n");
+ return 0;
+ }
+ get_options(str, 4, ints);
+ if (ints[0] < 1 || ints[0] > 3) {
+ printk("NCR53c406a: Malformed command line\n");
+ printk("NCR53c406a: Usage: ncr53c406a=<PORTBASE>[,<IRQ>[,<FASTPIO>]]\n");
+ return 0;
+ }
+ for (i = 0; i < PORT_COUNT && !port_base; i++)
+ if (ports[i] == ints[1]) {
+ port_base = ints[1];
+ DEB(printk("NCR53c406a: Specified port_base 0x%x\n", port_base);
+ )
+ }
+ if (!port_base) {
+ printk("NCR53c406a: Invalid PORTBASE 0x%x specified\n", ints[1]);
+ return 0;
+ }
+
+ if (ints[0] > 1) {
+ if (ints[2] == 0) {
+ irq_level = 0;
+ DEB(printk("NCR53c406a: Specified irq %d\n", irq_level);
+ )
+ } else
+ for (i = 0; i < INTR_COUNT && irq_level < 0; i++)
+ if (intrs[i] == ints[2]) {
+ irq_level = ints[2];
+ DEB(printk("NCR53c406a: Specified irq %d\n", port_base);
+ )
+ }
+ if (irq_level < 0)
+ printk("NCR53c406a: Invalid IRQ %d specified\n", ints[2]);
+ }
+
+ if (ints[0] > 2)
+ fast_pio = ints[3];
+
+ DEB(printk("NCR53c406a: port_base=0x%x, irq=%d, fast_pio=%d\n", port_base, irq_level, fast_pio);)
+ return 1;
+}
+
+__setup("ncr53c406a=", NCR53c406a_setup);
+
+#endif /* !MODULE */
+
+static const char *NCR53c406a_info(struct Scsi_Host *SChost)
+{
+ DEB(printk("NCR53c406a_info called\n"));
+ return (info_msg);
+}
+
+#if 0
+static void wait_intr(void)
+{
+ unsigned long i = jiffies + WATCHDOG;
+
+ while (time_after(i, jiffies) && !(inb(STAT_REG) & 0xe0)) { /* wait for a pseudo-interrupt */
+ cpu_relax();
+ barrier();
+ }
+
+ if (time_before_eq(i, jiffies)) { /* Timed out */
+ rtrc(0);
+ current_SC->result = DID_TIME_OUT << 16;
+ current_SC->SCp.phase = idle;
+ current_SC->scsi_done(current_SC);
+ return;
+ }
+
+ NCR53c406a_intr(NULL);
+}
+#endif
+
+static int NCR53c406a_queue_lck(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
+{
+ int i;
+
+ VDEB(printk("NCR53c406a_queue called\n"));
+ DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->target, (u8)SCpnt->device->lun, scsi_bufflen(SCpnt)));
+
+#if 0
+ VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
+ printk("cmd[%d]=%02x ", i, SCpnt->cmnd[i]));
+ VDEB(printk("\n"));
+#endif
+
+ current_SC = SCpnt;
+ current_SC->scsi_done = done;
+ current_SC->SCp.phase = command_ph;
+ current_SC->SCp.Status = 0;
+ current_SC->SCp.Message = 0;
+
+ /* We are locked here already by the mid layer */
+ REG0;
+ outb(scmd_id(SCpnt), DEST_ID); /* set destination */
+ outb(FLUSH_FIFO, CMD_REG); /* reset the fifos */
+
+ for (i = 0; i < SCpnt->cmd_len; i++) {
+ outb(SCpnt->cmnd[i], SCSI_FIFO);
+ }
+ outb(SELECT_NO_ATN, CMD_REG);
+
+ rtrc(1);
+ return 0;
+}
+
+static DEF_SCSI_QCMD(NCR53c406a_queue)
+
+static int NCR53c406a_host_reset(Scsi_Cmnd * SCpnt)
+{
+ DEB(printk("NCR53c406a_reset called\n"));
+
+ spin_lock_irq(SCpnt->device->host->host_lock);
+
+ outb(C4_IMG, CONFIG4); /* Select reg set 0 */
+ outb(CHIP_RESET, CMD_REG);
+ outb(SCSI_NOP, CMD_REG); /* required after reset */
+ outb(SCSI_RESET, CMD_REG);
+ chip_init();
+
+ rtrc(2);
+
+ spin_unlock_irq(SCpnt->device->host->host_lock);
+
+ return SUCCESS;
+}
+
+static int NCR53c406a_biosparm(struct scsi_device *disk,
+ struct block_device *dev,
+ sector_t capacity, int *info_array)
+{
+ int size;
+
+ DEB(printk("NCR53c406a_biosparm called\n"));
+
+ size = capacity;
+ info_array[0] = 64; /* heads */
+ info_array[1] = 32; /* sectors */
+ info_array[2] = size >> 11; /* cylinders */
+ if (info_array[2] > 1024) { /* big disk */
+ info_array[0] = 255;
+ info_array[1] = 63;
+ info_array[2] = size / (255 * 63);
+ }
+ return 0;
+}
+
+static irqreturn_t do_NCR53c406a_intr(int unused, void *dev_id)
+{
+ unsigned long flags;
+ struct Scsi_Host *dev = dev_id;
+
+ spin_lock_irqsave(dev->host_lock, flags);
+ NCR53c406a_intr(dev_id);
+ spin_unlock_irqrestore(dev->host_lock, flags);
+ return IRQ_HANDLED;
+}
+
+static void NCR53c406a_intr(void *dev_id)
+{
+ DEB(unsigned char fifo_size;
+ )
+ DEB(unsigned char seq_reg;
+ )
+ unsigned char status, int_reg;
+#if USE_PIO
+ unsigned char pio_status;
+ struct scatterlist *sg;
+ int i;
+#endif
+
+ VDEB(printk("NCR53c406a_intr called\n"));
+
+#if USE_PIO
+ REG1;
+ pio_status = inb(PIO_STATUS);
+#endif
+ REG0;
+ status = inb(STAT_REG);
+ DEB(seq_reg = inb(SEQ_REG));
+ int_reg = inb(INT_REG);
+ DEB(fifo_size = inb(FIFO_FLAGS) & 0x1f);
+
+#if NCR53C406A_DEBUG
+ printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", status, seq_reg, int_reg, fifo_size);
+#if (USE_DMA)
+ printk("\n");
+#else
+ printk(", pio=%02x\n", pio_status);
+#endif /* USE_DMA */
+#endif /* NCR53C406A_DEBUG */
+
+ if (int_reg & 0x80) { /* SCSI reset intr */
+ rtrc(3);
+ DEB(printk("NCR53c406a: reset intr received\n"));
+ current_SC->SCp.phase = idle;
+ current_SC->result = DID_RESET << 16;
+ current_SC->scsi_done(current_SC);
+ return;
+ }
+#if USE_PIO
+ if (pio_status & 0x80) {
+ printk("NCR53C406A: Warning: PIO error!\n");
+ current_SC->SCp.phase = idle;
+ current_SC->result = DID_ERROR << 16;
+ current_SC->scsi_done(current_SC);
+ return;
+ }
+#endif /* USE_PIO */
+
+ if (status & 0x20) { /* Parity error */
+ printk("NCR53c406a: Warning: parity error!\n");
+ current_SC->SCp.phase = idle;
+ current_SC->result = DID_PARITY << 16;
+ current_SC->scsi_done(current_SC);
+ return;
+ }
+
+ if (status & 0x40) { /* Gross error */
+ printk("NCR53c406a: Warning: gross error!\n");
+ current_SC->SCp.phase = idle;
+ current_SC->result = DID_ERROR << 16;
+ current_SC->scsi_done(current_SC);
+ return;
+ }
+
+ if (int_reg & 0x20) { /* Disconnect */
+ DEB(printk("NCR53c406a: disconnect intr received\n"));
+ if (current_SC->SCp.phase != message_in) { /* Unexpected disconnect */
+ current_SC->result = DID_NO_CONNECT << 16;
+ } else { /* Command complete, return status and message */
+ current_SC->result = (current_SC->SCp.Status & 0xff)
+ | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
+ }
+
+ rtrc(0);
+ current_SC->SCp.phase = idle;
+ current_SC->scsi_done(current_SC);
+ return;
+ }
+
+ switch (status & 0x07) { /* scsi phase */
+ case 0x00: /* DATA-OUT */
+ if (int_reg & 0x10) { /* Target requesting info transfer */
+ rtrc(5);
+ current_SC->SCp.phase = data_out;
+ VDEB(printk("NCR53c406a: Data-Out phase\n"));
+ outb(FLUSH_FIFO, CMD_REG);
+ LOAD_DMA_COUNT(scsi_bufflen(current_SC)); /* Max transfer size */
+#if USE_DMA /* No s/g support for DMA */
+ NCR53c406a_dma_write(scsi_sglist(current_SC),
+ scsdi_bufflen(current_SC));
+
+#endif /* USE_DMA */
+ outb(TRANSFER_INFO | DMA_OP, CMD_REG);
+#if USE_PIO
+ scsi_for_each_sg(current_SC, sg, scsi_sg_count(current_SC), i) {
+ NCR53c406a_pio_write(sg_virt(sg), sg->length);
+ }
+ REG0;
+#endif /* USE_PIO */
+ }
+ break;
+
+ case 0x01: /* DATA-IN */
+ if (int_reg & 0x10) { /* Target requesting info transfer */
+ rtrc(6);
+ current_SC->SCp.phase = data_in;
+ VDEB(printk("NCR53c406a: Data-In phase\n"));
+ outb(FLUSH_FIFO, CMD_REG);
+ LOAD_DMA_COUNT(scsi_bufflen(current_SC)); /* Max transfer size */
+#if USE_DMA /* No s/g support for DMA */
+ NCR53c406a_dma_read(scsi_sglist(current_SC),
+ scsdi_bufflen(current_SC));
+#endif /* USE_DMA */
+ outb(TRANSFER_INFO | DMA_OP, CMD_REG);
+#if USE_PIO
+ scsi_for_each_sg(current_SC, sg, scsi_sg_count(current_SC), i) {
+ NCR53c406a_pio_read(sg_virt(sg), sg->length);
+ }
+ REG0;
+#endif /* USE_PIO */
+ }
+ break;
+
+ case 0x02: /* COMMAND */
+ current_SC->SCp.phase = command_ph;
+ printk("NCR53c406a: Warning: Unknown interrupt occurred in command phase!\n");
+ break;
+
+ case 0x03: /* STATUS */
+ rtrc(7);
+ current_SC->SCp.phase = status_ph;
+ VDEB(printk("NCR53c406a: Status phase\n"));
+ outb(FLUSH_FIFO, CMD_REG);
+ outb(INIT_CMD_COMPLETE, CMD_REG);
+ break;
+
+ case 0x04: /* Reserved */
+ case 0x05: /* Reserved */
+ printk("NCR53c406a: WARNING: Reserved phase!!!\n");
+ break;
+
+ case 0x06: /* MESSAGE-OUT */
+ DEB(printk("NCR53c406a: Message-Out phase\n"));
+ current_SC->SCp.phase = message_out;
+ outb(SET_ATN, CMD_REG); /* Reject the message */
+ outb(MSG_ACCEPT, CMD_REG);
+ break;
+
+ case 0x07: /* MESSAGE-IN */
+ rtrc(4);
+ VDEB(printk("NCR53c406a: Message-In phase\n"));
+ current_SC->SCp.phase = message_in;
+
+ current_SC->SCp.Status = inb(SCSI_FIFO);
+ current_SC->SCp.Message = inb(SCSI_FIFO);
+
+ VDEB(printk("SCSI FIFO size=%d\n", inb(FIFO_FLAGS) & 0x1f));
+ DEB(printk("Status = %02x Message = %02x\n", current_SC->SCp.Status, current_SC->SCp.Message));
+
+ if (current_SC->SCp.Message == SAVE_POINTERS || current_SC->SCp.Message == DISCONNECT) {
+ outb(SET_ATN, CMD_REG); /* Reject message */
+ DEB(printk("Discarding SAVE_POINTERS message\n"));
+ }
+ outb(MSG_ACCEPT, CMD_REG);
+ break;
+ }
+}
+
+#ifndef IRQ_LEV
+static int irq_probe(void)
+{
+ int irqs, irq;
+ unsigned long i;
+
+ inb(INT_REG); /* clear the interrupt register */
+ irqs = probe_irq_on();
+
+ /* Invalid command will cause an interrupt */
+ REG0;
+ outb(0xff, CMD_REG);
+
+ /* Wait for the interrupt to occur */
+ i = jiffies + WATCHDOG;
+ while (time_after(i, jiffies) && !(inb(STAT_REG) & 0x80))
+ barrier();
+ if (time_before_eq(i, jiffies)) { /* Timed out, must be hardware trouble */
+ probe_irq_off(irqs);
+ return -1;
+ }
+
+ irq = probe_irq_off(irqs);
+
+ /* Kick the chip */
+ outb(CHIP_RESET, CMD_REG);
+ outb(SCSI_NOP, CMD_REG);
+ chip_init();
+
+ return irq;
+}
+#endif /* IRQ_LEV */
+
+static void chip_init(void)
+{
+ REG1;
+#if USE_DMA
+ outb(0x00, PIO_STATUS);
+#else /* USE_PIO */
+ outb(0x01, PIO_STATUS);
+#endif
+ outb(0x00, PIO_FLAG);
+
+ outb(C4_IMG, CONFIG4); /* REG0; */
+ outb(C3_IMG, CONFIG3);
+ outb(C2_IMG, CONFIG2);
+ outb(C1_IMG, CONFIG1);
+
+ outb(0x05, CLKCONV); /* clock conversion factor */
+ outb(0x9C, SRTIMOUT); /* Selection timeout */
+ outb(0x05, SYNCPRD); /* Synchronous transfer period */
+ outb(SYNC_MODE, SYNCOFF); /* synchronous mode */
+}
+
+static void __init calc_port_addr(void)
+{
+ /* Control Register Set 0 */
+ TC_LSB = (port_base + 0x00);
+ TC_MSB = (port_base + 0x01);
+ SCSI_FIFO = (port_base + 0x02);
+ CMD_REG = (port_base + 0x03);
+ STAT_REG = (port_base + 0x04);
+ DEST_ID = (port_base + 0x04);
+ INT_REG = (port_base + 0x05);
+ SRTIMOUT = (port_base + 0x05);
+ SEQ_REG = (port_base + 0x06);
+ SYNCPRD = (port_base + 0x06);
+ FIFO_FLAGS = (port_base + 0x07);
+ SYNCOFF = (port_base + 0x07);
+ CONFIG1 = (port_base + 0x08);
+ CLKCONV = (port_base + 0x09);
+ /* TESTREG = (port_base+0x0A); */
+ CONFIG2 = (port_base + 0x0B);
+ CONFIG3 = (port_base + 0x0C);
+ CONFIG4 = (port_base + 0x0D);
+ TC_HIGH = (port_base + 0x0E);
+ /* FIFO_BOTTOM = (port_base+0x0F); */
+
+ /* Control Register Set 1 */
+ /* JUMPER_SENSE = (port_base+0x00); */
+ /* SRAM_PTR = (port_base+0x01); */
+ /* SRAM_DATA = (port_base+0x02); */
+ PIO_FIFO = (port_base + 0x04);
+ /* PIO_FIFO1 = (port_base+0x05); */
+ /* PIO_FIFO2 = (port_base+0x06); */
+ /* PIO_FIFO3 = (port_base+0x07); */
+ PIO_STATUS = (port_base + 0x08);
+ /* ATA_CMD = (port_base+0x09); */
+ /* ATA_ERR = (port_base+0x0A); */
+ PIO_FLAG = (port_base + 0x0B);
+ CONFIG5 = (port_base + 0x0D);
+ /* SIGNATURE = (port_base+0x0E); */
+ /* CONFIG6 = (port_base+0x0F); */
+}
+
+MODULE_LICENSE("GPL");
+
+/* NOTE: scatter-gather support only works in PIO mode.
+ * Use SG_NONE if DMA mode is enabled!
+ */
+
+static struct scsi_host_template driver_template =
+{
+ .proc_name = "NCR53c406a" /* proc_name */,
+ .name = "NCR53c406a" /* name */,
+ .detect = NCR53c406a_detect /* detect */,
+ .release = NCR53c406a_release,
+ .info = NCR53c406a_info /* info */,
+ .queuecommand = NCR53c406a_queue /* queuecommand */,
+ .eh_host_reset_handler = NCR53c406a_host_reset /* reset */,
+ .bios_param = NCR53c406a_biosparm /* biosparm */,
+ .can_queue = 1 /* can_queue */,
+ .this_id = 7 /* SCSI ID of the chip */,
+ .sg_tablesize = 32 /*SG_ALL*/ /*SG_NONE*/,
+ .cmd_per_lun = 1 /* commands per lun */,
+ .unchecked_isa_dma = 1 /* unchecked_isa_dma */,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+#include "scsi_module.c"
+
+/*
+ * Overrides for Emacs so that we get a uniform tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 4
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -4
+ * c-argdecl-indent: 4
+ * c-label-offset: -4
+ * c-continued-statement-offset: 4
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: nil
+ * tab-width: 8
+ * End:
+ */
Code Review / kvmfornfv.git / blobdiff