diff options
Diffstat (limited to 'drivers/scsi/NCR53c406a.c')
| -rw-r--r-- | drivers/scsi/NCR53c406a.c | 1090 |
1 files changed, 0 insertions, 1090 deletions
diff --git a/drivers/scsi/NCR53c406a.c b/drivers/scsi/NCR53c406a.c deleted file mode 100644 index 6e110c630d2c..000000000000 --- a/drivers/scsi/NCR53c406a.c +++ /dev/null @@ -1,1090 +0,0 @@ -/* - * 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*/, - .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: - */ |