NCR53c406a.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:31k
- /*
- * 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/sched.h>
- #include <linux/interrupt.h>
- #include <linux/proc_fs.h>
- #include <linux/stat.h>
- #include <linux/init.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <asm/bitops.h>
- #include <asm/irq.h>
- #include <linux/blk.h>
- #include <linux/spinlock.h>
- #include "scsi.h"
- #include "hosts.h"
- #include "sd.h"
- #include "NCR53c406a.h"
- /* ============================================================= */
- #define WATCHDOG 5000000
- #define SYNC_MODE 0 /* Synchronous transfer mode */
- #if 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(int, void *, struct pt_regs *);
- static void do_NCR53c406a_intr(int, void *, struct pt_regs *);
- static void internal_done(Scsi_Cmnd *);
- static void wait_intr(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
- #if PORT_BASE
- static int port_base = PORT_BASE;
- #else
- static int port_base;
- #endif
- #if 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 volatile int internal_done_flag;
- static volatile int internal_done_errcode;
- static char info_msg[256];
- /* ================================================================= */
- /* possible BIOS locations */
- #if USE_BIOS
- static void *addresses[] = {
- (void *)0xd8000,
- (void *)0xc8000
- };
- #define ADDRESS_COUNT (sizeof( addresses ) / sizeof( unsigned ))
- #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 (sizeof( ports ) / sizeof( unsigned short ))
- /* possible interrupt channels */
- static unsigned short intrs[] = { 10, 11, 12, 15 };
- #define INTR_COUNT (sizeof( intrs ) / sizeof( unsigned short ))
- /* 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.rn2.8M Diskette Extension Bios ver 4.04.03 03/01/1993", 61, 82 },
- };
- #define SIGNATURE_COUNT (sizeof( signatures ) / sizeof( struct signature ))
- #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=%dn", count));
- if ((count & 1) || (((unsigned) ptr) & 1))
- panic ("NCR53c406a: attempted unaligned DMA transfern");
-
- 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 */
- unsigned long flags = 0;
-
- REG1;
- while (reqlen) {
- i = inb(PIO_STATUS);
- /* VDEB(printk("pio_status=%xn", 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;
-
- save_flags(flags);
- cli();
- 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--;
- }
- }
- restore_flags(flags);
- }
- }
- return 0;
- }
- static __inline__ int NCR53c406a_pio_write(unsigned char *request,
- unsigned int reqlen)
- {
- int i = 0;
- int len; /* current scsi fifo size */
- unsigned long flags = 0;
-
- REG1;
- while (reqlen && !(i&0x40)) {
- i = inb(PIO_STATUS);
- /* VDEB(printk("pio_status=%xn", 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;
-
- save_flags(flags);
- cli();
- 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--;
- }
- }
- restore_flags(flags);
- }
- }
- return 0;
- }
- #endif /* USE_PIO */
- int __init
- NCR53c406a_detect(Scsi_Host_Template * tpnt){
- struct Scsi_Host *shpnt;
- #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 foundn");
- return 0;
- }
-
- DEB(printk("NCR53c406a BIOS found at %Xn", (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 %x in usen", ports[i]));
- }
- else {
- VDEB(printk("NCR53c406a: port %x availablen", 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 validn"));
- VDEB(printk("port_base=%xn", port_base));
- break;
- }
- release_region(ports[i], 0x10);
- }
- }
- }
- #endif /* PORT_BASE */
-
- if(!port_base){ /* no ports found */
- printk("NCR53c406a: no available ports foundn");
- return 0;
- }
-
- DEB(printk("NCR53c406a detectedn"));
-
- 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 upn", irq_level);
- goto err_release;
- }
- }
- #endif
-
- DEB(printk("NCR53c406a: using port_base %xn", port_base));
-
- if(irq_level > 0) {
- if(request_irq(irq_level, do_NCR53c406a_intr, 0, "NCR53c406a", NULL)){
- printk("NCR53c406a: unable to allocate IRQ %dn", irq_level);
- goto err_release;
- }
- tpnt->can_queue = 1;
- DEB(printk("NCR53c406a: allocated IRQ %dn", irq_level));
- }
- else if (irq_level == 0) {
- tpnt->can_queue = 0;
- DEB(printk("NCR53c406a: No interrupts detectedn"));
- #if USE_DMA
- printk("NCR53c406a: No interrupts found and DMA mode defined. Giving up.n");
- goto err_release;
- #endif /* USE_DMA */
- }
- else {
- DEB(printk("NCR53c406a: Shouldn't get here!n"));
- goto err_free_irq;
- }
-
- #if USE_DMA
- dma_chan = DMA_CHAN;
- if(request_dma(dma_chan, "NCR53c406a") != 0){
- printk("NCR53c406a: unable to allocate DMA channel %dn", dma_chan);
- goto err_release;
- }
-
- DEB(printk("Allocated DMA channel %dn", dma_chan));
- #endif /* USE_DMA */
-
- tpnt->present = 1;
- tpnt->proc_name = "NCR53c406a";
-
- shpnt = scsi_register(tpnt, 0);
- if (!shpnt) {
- printk("NCR53c406a: Unable to register host, giving up.n");
- goto err_free_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 (tpnt->present);
- err_free_dma:
- #if USE_DMA
- free_dma(dma_chan);
- #endif
- err_free_irq:
- free_irq(irq_level, do_NCR53c406a_intr);
- err_release:
- release_region(port_base, 0x10);
- return 0;
- }
- /* called from init/main.c */
- void __init NCR53c406a_setup(char *str, int *ints)
- {
- static size_t setup_idx = 0;
- size_t i;
-
- DEB(printk("NCR53c406a: Setup calledn"););
-
- if (setup_idx >= PORT_COUNT - 1) {
- printk("NCR53c406a: Setup called too many times. Bad LILO params?n");
- return;
- }
- if (ints[0] < 1 || ints[0] > 3) {
- printk("NCR53c406a: Malformed command linen");
- printk("NCR53c406a: Usage: ncr53c406a=<PORTBASE>[,<IRQ>[,<FASTPIO>]]n");
- return;
- }
- 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%Xn", port_base);)
- }
- if (!port_base) {
- printk("NCR53c406a: Invalid PORTBASE 0x%X specifiedn", ints[1]);
- return;
- }
-
- if (ints[0] > 1) {
- if (ints[2] == 0) {
- irq_level = 0;
- DEB(printk("NCR53c406a: Specified irq %dn", 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 %dn", port_base);)
- }
- if (irq_level < 0)
- printk("NCR53c406a: Invalid IRQ %d specifiedn", ints[2]);
- }
-
- if (ints[0] > 2)
- fast_pio = ints[3];
-
- DEB(printk("NCR53c406a: port_base=0x%X, irq=%d, fast_pio=%dn",
- port_base, irq_level, fast_pio);)
- }
- const char*
- NCR53c406a_info(struct Scsi_Host *SChost){
- DEB(printk("NCR53c406a_info calledn"));
- return (info_msg);
- }
- static void internal_done(Scsi_Cmnd *SCpnt) {
- internal_done_errcode = SCpnt->result;
- ++internal_done_flag;
- }
- static void wait_intr(void) {
- int i = jiffies + WATCHDOG;
-
- while(time_after(i,jiffies) && !(inb(STAT_REG)&0xe0)) /* wait for a pseudo-interrupt */
- 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(0, NULL, NULL);
- }
- int NCR53c406a_command(Scsi_Cmnd *SCpnt){
- DEB(printk("NCR53c406a_command calledn"));
- NCR53c406a_queue(SCpnt, internal_done);
- if(irq_level)
- while (!internal_done_flag);
- else /* interrupts not supported */
- while (!internal_done_flag)
- wait_intr();
-
- internal_done_flag = 0;
- return internal_done_errcode;
- }
- int
- NCR53c406a_queue(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)){
- int i;
- unsigned long flags = 0;
- VDEB(printk("NCR53c406a_queue calledn"));
- DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%dn",
- SCpnt->cmnd[0],
- SCpnt->cmd_len,
- SCpnt->target,
- SCpnt->lun,
- SCpnt->request_bufflen));
-
- #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;
-
- save_flags(flags);
- cli();
- REG0;
- outb(SCpnt->target, 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);
- restore_flags(flags);
-
- rtrc(1);
- return 0;
- }
- int
- NCR53c406a_abort(Scsi_Cmnd *SCpnt){
- DEB(printk("NCR53c406a_abort calledn"));
- return SCSI_ABORT_SNOOZE; /* Don't know how to abort */
- }
- int
- NCR53c406a_reset(Scsi_Cmnd *SCpnt, unsigned int ignored){
- DEB(printk("NCR53c406a_reset calledn"));
- 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);
- if (irq_level)
- return SCSI_RESET_PENDING; /* should get an interrupt */
- else
- return SCSI_RESET_WAKEUP; /* won't get any interrupts */
- }
- int
- NCR53c406a_biosparm(Scsi_Disk *disk, kdev_t dev, int* info_array){
- int size;
-
- DEB(printk("NCR53c406a_biosparm calledn"));
-
- size = disk->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 void
- do_NCR53c406a_intr(int unused, void *dev_id, struct pt_regs *regs){
- unsigned long flags;
- spin_lock_irqsave(&io_request_lock, flags);
- NCR53c406a_intr(0, dev_id, regs);
- spin_unlock_irqrestore(&io_request_lock, flags);
- }
- static void
- NCR53c406a_intr(int unused, void *dev_id, struct pt_regs *regs){
- DEB(unsigned char fifo_size;)
- DEB(unsigned char seq_reg;)
- unsigned char status, int_reg;
- unsigned long flags = 0;
- #if USE_PIO
- unsigned char pio_status;
- struct scatterlist *sglist;
- unsigned int sgcount;
- #endif
-
- VDEB(printk("NCR53c406a_intr calledn"));
-
- save_flags(flags);
- cli();
- #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);
- restore_flags(flags);
-
- #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=%02xn", pio_status);
- #endif /* USE_DMA */
- #endif /* NCR53C406A_DEBUG */
-
- if(int_reg & 0x80){ /* SCSI reset intr */
- rtrc(3);
- DEB(printk("NCR53c406a: reset intr receivedn"));
- 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 receivedn"));
- 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 phasen"));
- outb(FLUSH_FIFO, CMD_REG);
- LOAD_DMA_COUNT(current_SC->request_bufflen); /* Max transfer size */
- #if USE_DMA /* No s/g support for DMA */
- NCR53c406a_dma_write(current_SC->request_buffer,
- current_SC->request_bufflen);
- #endif /* USE_DMA */
- outb(TRANSFER_INFO | DMA_OP, CMD_REG);
- #if USE_PIO
- if (!current_SC->use_sg) /* Don't use scatter-gather */
- NCR53c406a_pio_write(current_SC->request_buffer,
- current_SC->request_bufflen);
- else { /* use scatter-gather */
- sgcount = current_SC->use_sg;
- sglist = current_SC->request_buffer;
- while( sgcount-- ) {
- NCR53c406a_pio_write(sglist->address, sglist->length);
- sglist++;
- }
- }
- 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 phasen"));
- outb(FLUSH_FIFO, CMD_REG);
- LOAD_DMA_COUNT(current_SC->request_bufflen); /* Max transfer size */
- #if USE_DMA /* No s/g support for DMA */
- NCR53c406a_dma_read(current_SC->request_buffer,
- current_SC->request_bufflen);
- #endif /* USE_DMA */
- outb(TRANSFER_INFO | DMA_OP, CMD_REG);
- #if USE_PIO
- if (!current_SC->use_sg) /* Don't use scatter-gather */
- NCR53c406a_pio_read(current_SC->request_buffer,
- current_SC->request_bufflen);
- else { /* Use scatter-gather */
- sgcount = current_SC->use_sg;
- sglist = current_SC->request_buffer;
- while( sgcount-- ) {
- NCR53c406a_pio_read(sglist->address, sglist->length);
- sglist++;
- }
- }
- 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 phasen"));
- 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 phasen"));
- 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 phasen"));
- 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=%dn", inb(FIFO_FLAGS) & 0x1f));
- DEB(printk("Status = %02x Message = %02xn",
- 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 messagen"));
- }
- outb(MSG_ACCEPT, CMD_REG);
- break;
- }
- }
- #ifndef IRQ_LEV
- static int irq_probe(void)
- {
- int irqs, irq;
- int 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 */
- }
- 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");
- /* Eventually this will go into an include file, but this will be later */
- static Scsi_Host_Template driver_template = NCR53c406a;
- #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:
- */