diff options
Diffstat (limited to 'linux/dev/drivers/scsi/seagate.c')
| -rw-r--r-- | linux/dev/drivers/scsi/seagate.c | 1761 |
1 files changed, 1761 insertions, 0 deletions
diff --git a/linux/dev/drivers/scsi/seagate.c b/linux/dev/drivers/scsi/seagate.c new file mode 100644 index 0000000..a5acbee --- /dev/null +++ b/linux/dev/drivers/scsi/seagate.c @@ -0,0 +1,1761 @@ +/* + * seagate.c Copyright (C) 1992, 1993 Drew Eckhardt + * low level scsi driver for ST01/ST02, Future Domain TMC-885, + * TMC-950 by + * + * Drew Eckhardt + * + * <drew@colorado.edu> + * + * Note : TMC-880 boards don't work because they have two bits in + * the status register flipped, I'll fix this "RSN" + * + * This card does all the I/O via memory mapped I/O, so there is no need + * to check or allocate a region of the I/O address space. + */ + +/* + * Configuration : + * To use without BIOS -DOVERRIDE=base_address -DCONTROLLER=FD or SEAGATE + * -DIRQ will override the default of 5. + * Note: You can now set these options from the kernel's "command line". + * The syntax is: + * + * st0x=ADDRESS,IRQ (for a Seagate controller) + * or: + * tmc8xx=ADDRESS,IRQ (for a TMC-8xx or TMC-950 controller) + * eg: + * tmc8xx=0xC8000,15 + * + * will configure the driver for a TMC-8xx style controller using IRQ 15 + * with a base address of 0xC8000. + * + * -DFAST or -DFAST32 will use blind transfers where possible + * + * -DARBITRATE will cause the host adapter to arbitrate for the + * bus for better SCSI-II compatibility, rather than just + * waiting for BUS FREE and then doing its thing. Should + * let us do one command per Lun when I integrate my + * reorganization changes into the distribution sources. + * + * -DSLOW_HANDSHAKE will allow compatibility with broken devices that don't + * handshake fast enough (ie, some CD ROM's) for the Seagate + * code. + * + * -DSLOW_RATE=x, x some number will let you specify a default + * transfer rate if handshaking isn't working correctly. + */ + +#ifdef MACH +#define ARBITRATE +#define SLOW_HANDSHAKE +#define FAST32 +#endif + +#include <linux/module.h> + +#include <asm/io.h> +#include <asm/system.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <linux/config.h> +#include <linux/proc_fs.h> + +#include <linux/blk.h> +#include "scsi.h" +#include "hosts.h" +#include "seagate.h" +#include "constants.h" +#include<linux/stat.h> + +struct proc_dir_entry proc_scsi_seagate = { + PROC_SCSI_SEAGATE, 7, "seagate", + S_IFDIR | S_IRUGO | S_IXUGO, 2 +}; + + +#ifndef IRQ +#define IRQ 5 +#endif + +#if (defined(FAST32) && !defined(FAST)) +#define FAST +#endif + +#if defined(SLOW_RATE) && !defined(SLOW_HANDSHAKE) +#define SLOW_HANDSHAKE +#endif + +#if defined(SLOW_HANDSHAKE) && !defined(SLOW_RATE) +#define SLOW_RATE 50 +#endif + + +#if defined(LINKED) +#undef LINKED /* Linked commands are currently broken ! */ +#endif + +static int internal_command(unsigned char target, unsigned char lun, + const void *cmnd, + void *buff, int bufflen, int reselect); + +static int incommand; /* + set if arbitration has finished and we are + in some command phase. + */ + +static const void *base_address = NULL; /* + Where the card ROM starts, + used to calculate memory mapped + register location. + */ +#ifdef notyet +static volatile int abort_confirm = 0; +#endif + +static volatile void *st0x_cr_sr; /* + control register write, + status register read. + 256 bytes in length. + + Read is status of SCSI BUS, + as per STAT masks. + + */ + + +static volatile void *st0x_dr; /* + data register, read write + 256 bytes in length. + */ + + +static volatile int st0x_aborted=0; /* + set when we are aborted, ie by a time out, etc. + */ + +static unsigned char controller_type = 0; /* set to SEAGATE for ST0x boards or FD for TMC-8xx boards */ +static unsigned char irq = IRQ; + +#define retcode(result) (((result) << 16) | (message << 8) | status) +#define STATUS (*(volatile unsigned char *) st0x_cr_sr) +#define CONTROL STATUS +#define DATA (*(volatile unsigned char *) st0x_dr) + +void st0x_setup (char *str, int *ints) { + controller_type = SEAGATE; + base_address = (void *) ints[1]; + irq = ints[2]; +} + +void tmc8xx_setup (char *str, int *ints) { + controller_type = FD; + base_address = (void *) ints[1]; + irq = ints[2]; +} + + +#ifndef OVERRIDE +static const char * seagate_bases[] = { + (char *) 0xc8000, (char *) 0xca000, (char *) 0xcc000, + (char *) 0xce000, (char *) 0xdc000, (char *) 0xde000 +}; + +typedef struct { + const char *signature ; + unsigned offset; + unsigned length; + unsigned char type; +} Signature; + +static const Signature signatures[] = { +#ifdef CONFIG_SCSI_SEAGATE +{"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE}, +{"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE}, + +/* + * The following two lines are NOT mistakes. One detects ROM revision + * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter, + * and this is not going to change, the "SEAGATE" and "SCSI" together + * are probably "good enough" + */ + +{"SEAGATE SCSI BIOS ",16, 17, SEAGATE}, +{"SEAGATE SCSI BIOS ",17, 17, SEAGATE}, + +/* + * However, future domain makes several incompatible SCSI boards, so specific + * signatures must be used. + */ + +{"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 46, FD}, +{"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FD}, +{"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90",5, 47, FD}, +{"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90",5, 47, FD}, +{"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FD}, +{"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FD}, +{"IBM F1 BIOS V1.1004/30/92", 5, 25, FD}, +{"FUTURE DOMAIN TMC-950", 5, 21, FD}, +#endif /* CONFIG_SCSI_SEAGATE */ +} +; + +#define NUM_SIGNATURES (sizeof(signatures) / sizeof(Signature)) +#endif /* n OVERRIDE */ + +/* + * hostno stores the hostnumber, as told to us by the init routine. + */ + +static int hostno = -1; +static void seagate_reconnect_intr(int, void *, struct pt_regs *); + +#ifdef FAST +static int fast = 1; +#endif + +#ifdef SLOW_HANDSHAKE +/* + * Support for broken devices : + * The Seagate board has a handshaking problem. Namely, a lack + * thereof for slow devices. You can blast 600K/second through + * it if you are polling for each byte, more if you do a blind + * transfer. In the first case, with a fast device, REQ will + * transition high-low or high-low-high before your loop restarts + * and you'll have no problems. In the second case, the board + * will insert wait states for up to 13.2 usecs for REQ to + * transition low->high, and everything will work. + * + * However, there's nothing in the state machine that says + * you *HAVE* to see a high-low-high set of transitions before + * sending the next byte, and slow things like the Trantor CD ROMS + * will break because of this. + * + * So, we need to slow things down, which isn't as simple as it + * seems. We can't slow things down period, because then people + * who don't recompile their kernels will shoot me for ruining + * their performance. We need to do it on a case per case basis. + * + * The best for performance will be to, only for borken devices + * (this is stored on a per-target basis in the scsi_devices array) + * + * Wait for a low->high transition before continuing with that + * transfer. If we timeout, continue anyways. We don't need + * a long timeout, because REQ should only be asserted until the + * corresponding ACK is received and processed. + * + * Note that we can't use the system timer for this, because of + * resolution, and we *really* can't use the timer chip since + * gettimeofday() and the beeper routines use that. So, + * the best thing for us to do will be to calibrate a timing + * loop in the initialization code using the timer chip before + * gettimeofday() can screw with it. + */ + +static int borken_calibration = 0; +static void borken_init (void) { + register int count = 0, start = jiffies + 1, stop = start + 25; + + while (jiffies < start); + for (;jiffies < stop; ++count); + +/* + * Ok, we now have a count for .25 seconds. Convert to a + * count per second and divide by transfer rate in K. + */ + + borken_calibration = (count * 4) / (SLOW_RATE*1024); + + if (borken_calibration < 1) + borken_calibration = 1; +#if (DEBUG & DEBUG_BORKEN) + printk("scsi%d : borken calibrated to %dK/sec, %d cycles per transfer\n", + hostno, BORKEN_RATE, borken_calibration); +#endif +} + +static inline void borken_wait(void) { + register int count; + for (count = borken_calibration; count && (STATUS & STAT_REQ); + --count); +#if (DEBUG & DEBUG_BORKEN) + if (count) + printk("scsi%d : borken timeout\n", hostno); +#endif +} + +#endif /* def SLOW_HANDSHAKE */ + +int seagate_st0x_detect (Scsi_Host_Template * tpnt) + { + struct Scsi_Host *instance; +#ifndef OVERRIDE + int i,j; +#endif + + tpnt->proc_dir = &proc_scsi_seagate; +/* + * First, we try for the manual override. + */ +#ifdef DEBUG + printk("Autodetecting ST0x / TMC-8xx\n"); +#endif + + if (hostno != -1) + { + printk ("ERROR : seagate_st0x_detect() called twice.\n"); + return 0; + } + + /* If the user specified the controller type from the command line, + controller_type will be non-zero, so don't try to detect one */ + + if (!controller_type) { +#ifdef OVERRIDE + base_address = (void *) OVERRIDE; + +/* CONTROLLER is used to override controller (SEAGATE or FD). PM: 07/01/93 */ +#ifdef CONTROLLER + controller_type = CONTROLLER; +#else +#error Please use -DCONTROLLER=SEAGATE or -DCONTROLLER=FD to override controller type +#endif /* CONTROLLER */ +#ifdef DEBUG + printk("Base address overridden to %x, controller type is %s\n", + base_address,controller_type == SEAGATE ? "SEAGATE" : "FD"); +#endif +#else /* OVERRIDE */ +/* + * To detect this card, we simply look for the signature + * from the BIOS version notice in all the possible locations + * of the ROM's. This has a nice side effect of not trashing + * any register locations that might be used by something else. + * + * XXX - note that we probably should be probing the address + * space for the on-board RAM instead. + */ + + for (i = 0; i < (sizeof (seagate_bases) / sizeof (char * )); ++i) + for (j = 0; !base_address && j < NUM_SIGNATURES; ++j) + if (!memcmp ((const void *) (seagate_bases[i] + + signatures[j].offset), (const void *) signatures[j].signature, + signatures[j].length)) { + base_address = (const void *) seagate_bases[i]; + controller_type = signatures[j].type; + } +#endif /* OVERRIDE */ + } /* (! controller_type) */ + + tpnt->this_id = (controller_type == SEAGATE) ? 7 : 6; + tpnt->name = (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR; + + if (base_address) + { + st0x_cr_sr =(void *) (((const unsigned char *) base_address) + (controller_type == SEAGATE ? 0x1a00 : 0x1c00)); + st0x_dr = (void *) (((const unsigned char *) base_address ) + (controller_type == SEAGATE ? 0x1c00 : 0x1e00)); +#ifdef DEBUG + printk("%s detected. Base address = %x, cr = %x, dr = %x\n", tpnt->name, base_address, st0x_cr_sr, st0x_dr); +#endif +/* + * At all times, we will use IRQ 5. Should also check for IRQ3 if we + * loose our first interrupt. + */ + instance = scsi_register(tpnt, 0); + hostno = instance->host_no; + if (request_irq((int) irq, seagate_reconnect_intr, SA_INTERRUPT, + (controller_type == SEAGATE) ? "seagate" : "tmc-8xx", NULL)) { + printk("scsi%d : unable to allocate IRQ%d\n", + hostno, (int) irq); + return 0; + } + instance->irq = irq; + instance->io_port = (unsigned int) base_address; +#ifdef SLOW_HANDSHAKE + borken_init(); +#endif + + printk("%s options:" +#ifdef ARBITRATE + " ARBITRATE" +#endif +#ifdef SLOW_HANDSHAKE + " SLOW_HANDSHAKE" +#endif +#ifdef FAST +#ifdef FAST32 + " FAST32" +#else + " FAST" +#endif +#endif +#ifdef LINKED + " LINKED" +#endif + "\n", tpnt->name); + return 1; + } + else + { +#ifdef DEBUG + printk("ST0x / TMC-8xx not detected.\n"); +#endif + return 0; + } + } + +const char *seagate_st0x_info(struct Scsi_Host * shpnt) { + static char buffer[64]; + sprintf(buffer, "%s at irq %d, address 0x%05X", + (controller_type == SEAGATE) ? ST0X_ID_STR : FD_ID_STR, + irq, (unsigned int)base_address); + return buffer; +} + +int seagate_st0x_proc_info(char *buffer, char **start, off_t offset, + int length, int hostno, int inout) +{ + const char *info = seagate_st0x_info(NULL); + int len; + int pos; + int begin; + + if (inout) return(-ENOSYS); + + begin = 0; + strcpy(buffer,info); + strcat(buffer,"\n"); + + pos = len = strlen(buffer); + + if (pos<offset) { + len = 0; + begin = pos; + } + + *start = buffer + (offset - begin); + len -= (offset - begin); + if ( len > length ) len = length; + return(len); +} + +/* + * These are our saved pointers for the outstanding command that is + * waiting for a reconnect + */ + +static unsigned char current_target, current_lun; +static unsigned char *current_cmnd, *current_data; +static int current_nobuffs; +static struct scatterlist *current_buffer; +static int current_bufflen; + +#ifdef LINKED + +/* + * linked_connected indicates whether or not we are currently connected to + * linked_target, linked_lun and in an INFORMATION TRANSFER phase, + * using linked commands. + */ + +static int linked_connected = 0; +static unsigned char linked_target, linked_lun; +#endif + + +static void (*done_fn)(Scsi_Cmnd *) = NULL; +static Scsi_Cmnd * SCint = NULL; + +/* + * These control whether or not disconnect / reconnect will be attempted, + * or are being attempted. + */ + +#define NO_RECONNECT 0 +#define RECONNECT_NOW 1 +#define CAN_RECONNECT 2 + +#ifdef LINKED + +/* + * LINKED_RIGHT indicates that we are currently connected to the correct target + * for this command, LINKED_WRONG indicates that we are connected to the wrong + * target. Note that these imply CAN_RECONNECT. + */ + +#define LINKED_RIGHT 3 +#define LINKED_WRONG 4 +#endif + +/* + * This determines if we are expecting to reconnect or not. + */ + +static int should_reconnect = 0; + +/* + * The seagate_reconnect_intr routine is called when a target reselects the + * host adapter. This occurs on the interrupt triggered by the target + * asserting SEL. + */ + +static void seagate_reconnect_intr(int irq, void *dev_id, struct pt_regs *regs) + { + int temp; + Scsi_Cmnd * SCtmp; + +/* enable all other interrupts. */ + sti(); +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : seagate_reconnect_intr() called\n", hostno); +#endif + + if (!should_reconnect) + printk("scsi%d: unexpected interrupt.\n", hostno); + else { + should_reconnect = 0; + +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : internal_command(" + "%d, %08x, %08x, %d, RECONNECT_NOW\n", hostno, + current_target, current_data, current_bufflen); +#endif + + temp = internal_command (current_target, current_lun, + current_cmnd, current_data, current_bufflen, + RECONNECT_NOW); + + if (msg_byte(temp) != DISCONNECT) { + if (done_fn) { +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : done_fn(%d,%08x)", hostno, + hostno, temp); +#endif + if(!SCint) panic("SCint == NULL in seagate"); + SCtmp = SCint; + SCint = NULL; + SCtmp->result = temp; + done_fn (SCtmp); + } else + printk("done_fn() not defined.\n"); + } + } + } + +/* + * The seagate_st0x_queue_command() function provides a queued interface + * to the seagate SCSI driver. Basically, it just passes control onto the + * seagate_command() function, after fixing it so that the done_fn() + * is set to the one passed to the function. We have to be very careful, + * because there are some commands on some devices that do not disconnect, + * and if we simply call the done_fn when the command is done then another + * command is started and queue_command is called again... We end up + * overflowing the kernel stack, and this tends not to be such a good idea. + */ + +static int recursion_depth = 0; + +int seagate_st0x_queue_command (Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *)) + { + int result, reconnect; + Scsi_Cmnd * SCtmp; + + done_fn = done; + current_target = SCpnt->target; + current_lun = SCpnt->lun; + (const void *) current_cmnd = SCpnt->cmnd; + current_data = (unsigned char *) SCpnt->request_buffer; + current_bufflen = SCpnt->request_bufflen; + SCint = SCpnt; + if(recursion_depth) { + return 0; + }; + recursion_depth++; + do{ +#ifdef LINKED +/* + * Set linked command bit in control field of SCSI command. + */ + + current_cmnd[SCpnt->cmd_len] |= 0x01; + if (linked_connected) { +#if (DEBUG & DEBUG_LINKED) + printk("scsi%d : using linked commands, current I_T_L nexus is ", + hostno); +#endif + if ((linked_target == current_target) && + (linked_lun == current_lun)) { +#if (DEBUG & DEBUG_LINKED) + printk("correct\n"); +#endif + reconnect = LINKED_RIGHT; + } else { +#if (DEBUG & DEBUG_LINKED) + printk("incorrect\n"); +#endif + reconnect = LINKED_WRONG; + } + } else +#endif /* LINKED */ + reconnect = CAN_RECONNECT; + + + + + + result = internal_command (SCint->target, SCint->lun, SCint->cmnd, SCint->request_buffer, + SCint->request_bufflen, + reconnect); + if (msg_byte(result) == DISCONNECT) break; + SCtmp = SCint; + SCint = NULL; + SCtmp->result = result; + done_fn (SCtmp); + } while(SCint); + recursion_depth--; + return 0; + } + +int seagate_st0x_command (Scsi_Cmnd * SCpnt) { + return internal_command (SCpnt->target, SCpnt->lun, SCpnt->cmnd, SCpnt->request_buffer, + SCpnt->request_bufflen, + (int) NO_RECONNECT); +} + +static int internal_command(unsigned char target, unsigned char lun, const void *cmnd, + void *buff, int bufflen, int reselect) { + int len = 0; + unsigned char *data = NULL; + struct scatterlist *buffer = NULL; + int nobuffs = 0; + int clock; + int temp; +#ifdef SLOW_HANDSHAKE + int borken; /* Does the current target require Very Slow I/O ? */ +#endif + + +#if (DEBUG & PHASE_DATAIN) || (DEBUG & PHASE_DATOUT) + int transfered = 0; +#endif + +#if (((DEBUG & PHASE_ETC) == PHASE_ETC) || (DEBUG & PRINT_COMMAND) || \ + (DEBUG & PHASE_EXIT)) + int i; +#endif + +#if ((DEBUG & PHASE_ETC) == PHASE_ETC) + int phase=0, newphase; +#endif + + int done = 0; + unsigned char status = 0; + unsigned char message = 0; + register unsigned char status_read; + + unsigned transfersize = 0, underflow = 0; + + incommand = 0; + st0x_aborted = 0; + +#ifdef SLOW_HANDSHAKE + borken = (int) SCint->device->borken; +#endif + +#if (DEBUG & PRINT_COMMAND) + printk ("scsi%d : target = %d, command = ", hostno, target); + print_command((unsigned char *) cmnd); + printk("\n"); +#endif + +#if (DEBUG & PHASE_RESELECT) + switch (reselect) { + case RECONNECT_NOW : + printk("scsi%d : reconnecting\n", hostno); + break; +#ifdef LINKED + case LINKED_RIGHT : + printk("scsi%d : connected, can reconnect\n", hostno); + break; + case LINKED_WRONG : + printk("scsi%d : connected to wrong target, can reconnect\n", + hostno); + break; +#endif + case CAN_RECONNECT : + printk("scsi%d : allowed to reconnect\n", hostno); + break; + default : + printk("scsi%d : not allowed to reconnect\n", hostno); + } +#endif + + + if (target == (controller_type == SEAGATE ? 7 : 6)) + return DID_BAD_TARGET; + +/* + * We work it differently depending on if this is "the first time," + * or a reconnect. If this is a reselect phase, then SEL will + * be asserted, and we must skip selection / arbitration phases. + */ + + switch (reselect) { + case RECONNECT_NOW: +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : phase RESELECT \n", hostno); +#endif + +/* + * At this point, we should find the logical or of our ID and the original + * target's ID on the BUS, with BSY, SEL, and I/O signals asserted. + * + * After ARBITRATION phase is completed, only SEL, BSY, and the + * target ID are asserted. A valid initiator ID is not on the bus + * until IO is asserted, so we must wait for that. + */ + clock = jiffies + 10; + for (;;) { + temp = STATUS; + if ((temp & STAT_IO) && !(temp & STAT_BSY)) + break; + + if (jiffies > clock) { +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : RESELECT timed out while waiting for IO .\n", + hostno); +#endif + return (DID_BAD_INTR << 16); + } + } + +/* + * After I/O is asserted by the target, we can read our ID and its + * ID off of the BUS. + */ + + if (!((temp = DATA) & (controller_type == SEAGATE ? 0x80 : 0x40))) + { +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : detected reconnect request to different target.\n" + "\tData bus = %d\n", hostno, temp); +#endif + return (DID_BAD_INTR << 16); + } + + if (!(temp & (1 << current_target))) + { + printk("scsi%d : Unexpected reselect interrupt. Data bus = %d\n", + hostno, temp); + return (DID_BAD_INTR << 16); + } + + buffer=current_buffer; + cmnd=current_cmnd; /* WDE add */ + data=current_data; /* WDE add */ + len=current_bufflen; /* WDE add */ + nobuffs=current_nobuffs; + +/* + * We have determined that we have been selected. At this point, + * we must respond to the reselection by asserting BSY ourselves + */ + +#if 1 + CONTROL = (BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY); +#else + CONTROL = (BASE_CMD | CMD_BSY); +#endif + +/* + * The target will drop SEL, and raise BSY, at which time we must drop + * BSY. + */ + + for (clock = jiffies + 10; (jiffies < clock) && (STATUS & STAT_SEL);); + + if (jiffies >= clock) + { + CONTROL = (BASE_CMD | CMD_INTR); +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : RESELECT timed out while waiting for SEL.\n", + hostno); +#endif + return (DID_BAD_INTR << 16); + } + + CONTROL = BASE_CMD; + +/* + * At this point, we have connected with the target and can get + * on with our lives. + */ + break; + case CAN_RECONNECT: + +#ifdef LINKED +/* + * This is a bletcherous hack, just as bad as the Unix #! interpreter stuff. + * If it turns out we are using the wrong I_T_L nexus, the easiest way to deal + * with it is to go into our INFORMATION TRANSFER PHASE code, send a ABORT + * message on MESSAGE OUT phase, and then loop back to here. + */ + +connect_loop : + +#endif + +#if (DEBUG & PHASE_BUS_FREE) + printk ("scsi%d : phase = BUS FREE \n", hostno); +#endif + +/* + * BUS FREE PHASE + * + * On entry, we make sure that the BUS is in a BUS FREE + * phase, by insuring that both BSY and SEL are low for + * at least one bus settle delay. Several reads help + * eliminate wire glitch. + */ + + clock = jiffies + ST0X_BUS_FREE_DELAY; + +#if !defined (ARBITRATE) + while (((STATUS | STATUS | STATUS) & + (STAT_BSY | STAT_SEL)) && + (!st0x_aborted) && (jiffies < clock)); + + if (jiffies > clock) + return retcode(DID_BUS_BUSY); + else if (st0x_aborted) + return retcode(st0x_aborted); +#endif + +#if (DEBUG & PHASE_SELECTION) + printk("scsi%d : phase = SELECTION\n", hostno); +#endif + + clock = jiffies + ST0X_SELECTION_DELAY; + +/* + * Arbitration/selection procedure : + * 1. Disable drivers + * 2. Write HOST adapter address bit + * 3. Set start arbitration. + * 4. We get either ARBITRATION COMPLETE or SELECT at this + * point. + * 5. OR our ID and targets on bus. + * 6. Enable SCSI drivers and asserted SEL and ATTN + */ + +#if defined(ARBITRATE) + cli(); + CONTROL = 0; + DATA = (controller_type == SEAGATE) ? 0x80 : 0x40; + CONTROL = CMD_START_ARB; + sti(); + while (!((status_read = STATUS) & (STAT_ARB_CMPL | STAT_SEL)) && + (jiffies < clock) && !st0x_aborted); + + if (!(status_read & STAT_ARB_CMPL)) { +#if (DEBUG & PHASE_SELECTION) + if (status_read & STAT_SEL) + printk("scsi%d : arbitration lost\n", hostno); + else + printk("scsi%d : arbitration timeout.\n", hostno); +#endif + CONTROL = BASE_CMD; + return retcode(DID_NO_CONNECT); + }; + +#if (DEBUG & PHASE_SELECTION) + printk("scsi%d : arbitration complete\n", hostno); +#endif +#endif + + +/* + * When the SCSI device decides that we're gawking at it, it will + * respond by asserting BUSY on the bus. + * + * Note : the Seagate ST-01/02 product manual says that we should + * twiddle the DATA register before the control register. However, + * this does not work reliably so we do it the other way around. + * + * Probably could be a problem with arbitration too, we really should + * try this with a SCSI protocol or logic analyzer to see what is + * going on. + */ + cli(); + DATA = (unsigned char) ((1 << target) | (controller_type == SEAGATE ? 0x80 : 0x40)); + CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_SEL | + (reselect ? CMD_ATTN : 0); + sti(); + while (!((status_read = STATUS) & STAT_BSY) && + (jiffies < clock) && !st0x_aborted) + +#if 0 && (DEBUG & PHASE_SELECTION) + { + temp = clock - jiffies; + + if (!(jiffies % 5)) + printk("seagate_st0x_timeout : %d \r",temp); + + } + printk("Done. \n"); + printk("scsi%d : status = %02x, seagate_st0x_timeout = %d, aborted = %02x \n", + hostno, status_read, temp, st0x_aborted); +#else + ; +#endif + + + if ((jiffies >= clock) && !(status_read & STAT_BSY)) + { +#if (DEBUG & PHASE_SELECTION) + printk ("scsi%d : NO CONNECT with target %d, status = %x \n", + hostno, target, STATUS); +#endif + return retcode(DID_NO_CONNECT); + } + +/* + * If we have been aborted, and we have a command in progress, IE the + * target still has BSY asserted, then we will reset the bus, and + * notify the midlevel driver to expect sense. + */ + + if (st0x_aborted) { + CONTROL = BASE_CMD; + if (STATUS & STAT_BSY) { + printk("scsi%d : BST asserted after we've been aborted.\n", + hostno); + seagate_st0x_reset(NULL, 0); + return retcode(DID_RESET); + } + return retcode(st0x_aborted); + } + +/* Establish current pointers. Take into account scatter / gather */ + + if ((nobuffs = SCint->use_sg)) { +#if (DEBUG & DEBUG_SG) + { + int i; + printk("scsi%d : scatter gather requested, using %d buffers.\n", + hostno, nobuffs); + for (i = 0; i < nobuffs; ++i) + printk("scsi%d : buffer %d address = %08x length = %d\n", + hostno, i, buffer[i].address, buffer[i].length); + } +#endif + + buffer = (struct scatterlist *) SCint->buffer; + len = buffer->length; + data = (unsigned char *) buffer->address; + } else { +#if (DEBUG & DEBUG_SG) + printk("scsi%d : scatter gather not requested.\n", hostno); +#endif + buffer = NULL; + len = SCint->request_bufflen; + data = (unsigned char *) SCint->request_buffer; + } + +#if (DEBUG & (PHASE_DATAIN | PHASE_DATAOUT)) + printk("scsi%d : len = %d\n", hostno, len); +#endif + + break; +#ifdef LINKED + case LINKED_RIGHT: + break; + case LINKED_WRONG: + break; +#endif + } + +/* + * There are several conditions under which we wish to send a message : + * 1. When we are allowing disconnect / reconnect, and need to establish + * the I_T_L nexus via an IDENTIFY with the DiscPriv bit set. + * + * 2. When we are doing linked commands, are have the wrong I_T_L nexus + * established and want to send an ABORT message. + */ + + + CONTROL = BASE_CMD | CMD_DRVR_ENABLE | + (((reselect == CAN_RECONNECT) +#ifdef LINKED + || (reselect == LINKED_WRONG) +#endif + ) ? CMD_ATTN : 0) ; + +/* + * INFORMATION TRANSFER PHASE + * + * The nasty looking read / write inline assembler loops we use for + * DATAIN and DATAOUT phases are approximately 4-5 times as fast as + * the 'C' versions - since we're moving 1024 bytes of data, this + * really adds up. + */ + +#if ((DEBUG & PHASE_ETC) == PHASE_ETC) + printk("scsi%d : phase = INFORMATION TRANSFER\n", hostno); +#endif + + incommand = 1; + transfersize = SCint->transfersize; + underflow = SCint->underflow; + + +/* + * Now, we poll the device for status information, + * and handle any requests it makes. Note that since we are unsure of + * how much data will be flowing across the system, etc and cannot + * make reasonable timeouts, that we will instead have the midlevel + * driver handle any timeouts that occur in this phase. + */ + + while (((status_read = STATUS) & STAT_BSY) && !st0x_aborted && !done) + { +#ifdef PARITY + if (status_read & STAT_PARITY) + { + printk("scsi%d : got parity error\n", hostno); + st0x_aborted = DID_PARITY; + } +#endif + + if (status_read & STAT_REQ) + { +#if ((DEBUG & PHASE_ETC) == PHASE_ETC) + if ((newphase = (status_read & REQ_MASK)) != phase) + { + phase = newphase; + switch (phase) + { + case REQ_DATAOUT: + printk("scsi%d : phase = DATA OUT\n", + hostno); + break; + case REQ_DATAIN : + printk("scsi%d : phase = DATA IN\n", + hostno); + break; + case REQ_CMDOUT : + printk("scsi%d : phase = COMMAND OUT\n", + hostno); + break; + case REQ_STATIN : + printk("scsi%d : phase = STATUS IN\n", + hostno); + break; + case REQ_MSGOUT : + printk("scsi%d : phase = MESSAGE OUT\n", + hostno); + break; + case REQ_MSGIN : + printk("scsi%d : phase = MESSAGE IN\n", + hostno); + break; + default : + printk("scsi%d : phase = UNKNOWN\n", + hostno); + st0x_aborted = DID_ERROR; + } + } +#endif + switch (status_read & REQ_MASK) + { + case REQ_DATAOUT : +/* + * If we are in fast mode, then we simply splat the data out + * in word-sized chunks as fast as we can. + */ + +#ifdef FAST +if (!len) { +#if 0 + printk("scsi%d: underflow to target %d lun %d \n", + hostno, target, lun); + st0x_aborted = DID_ERROR; + fast = 0; +#endif + break; +} + +if (fast && transfersize && !(len % transfersize) && (len >= transfersize) +#ifdef FAST32 + && !(transfersize % 4) +#endif + ) { +#if (DEBUG & DEBUG_FAST) + printk("scsi%d : FAST transfer, underflow = %d, transfersize = %d\n" + " len = %d, data = %08x\n", hostno, SCint->underflow, + SCint->transfersize, len, data); +#endif + + __asm__(" + cld; +" +#ifdef FAST32 +" shr $2, %%ecx; +1: lodsl; + movl %%eax, (%%edi); +" +#else +"1: lodsb; + movb %%al, (%%edi); +" +#endif +" loop 1b;" : : + /* input */ + "D" (st0x_dr), "S" (data), "c" (SCint->transfersize) : + /* clobbered */ + "eax", "ecx", "esi" ); + + len -= transfersize; + data += transfersize; + +#if (DEBUG & DEBUG_FAST) + printk("scsi%d : FAST transfer complete len = %d data = %08x\n", + hostno, len, data); +#endif + + +} else +#endif + +{ +/* + * We loop as long as we are in a data out phase, there is data to send, + * and BSY is still active. + */ + __asm__ ( + +/* + Local variables : + len = ecx + data = esi + st0x_cr_sr = ebx + st0x_dr = edi + + Test for any data here at all. +*/ + "\torl %%ecx, %%ecx + jz 2f + + cld + + movl " SYMBOL_NAME_STR(st0x_cr_sr) ", %%ebx + movl " SYMBOL_NAME_STR(st0x_dr) ", %%edi + +1: movb (%%ebx), %%al\n" +/* + Test for BSY +*/ + + "\ttest $1, %%al + jz 2f\n" + +/* + Test for data out phase - STATUS & REQ_MASK should be REQ_DATAOUT, which is 0. +*/ + "\ttest $0xe, %%al + jnz 2f \n" +/* + Test for REQ +*/ + "\ttest $0x10, %%al + jz 1b + lodsb + movb %%al, (%%edi) + loop 1b + +2: + ": +/* output */ +"=S" (data), "=c" (len) : +/* input */ +"0" (data), "1" (len) : +/* clobbered */ +"eax", "ebx", "edi"); +} + + if (!len && nobuffs) { + --nobuffs; + ++buffer; + len = buffer->length; + data = (unsigned char *) buffer->address; +#if (DEBUG & DEBUG_SG) + printk("scsi%d : next scatter-gather buffer len = %d address = %08x\n", + hostno, len, data); +#endif + } + break; + + case REQ_DATAIN : +#ifdef SLOW_HANDSHAKE + if (borken) { +#if (DEBUG & (PHASE_DATAIN)) + transfered += len; +#endif + for (; len && (STATUS & (REQ_MASK | STAT_REQ)) == (REQ_DATAIN | + STAT_REQ); --len) { + *data++ = DATA; + borken_wait(); +} +#if (DEBUG & (PHASE_DATAIN)) + transfered -= len; +#endif + } else +#endif +#ifdef FAST +if (fast && transfersize && !(len % transfersize) && (len >= transfersize) +#ifdef FAST32 + && !(transfersize % 4) +#endif + ) { +#if (DEBUG & DEBUG_FAST) + printk("scsi%d : FAST transfer, underflow = %d, transfersize = %d\n" + " len = %d, data = %08x\n", hostno, SCint->underflow, + SCint->transfersize, len, data); +#endif + __asm__(" + cld; +" +#ifdef FAST32 +" shr $2, %%ecx; +1: movl (%%esi), %%eax; + stosl; +" +#else +"1: movb (%%esi), %%al; + stosb; +" +#endif + +" loop 1b;" : : + /* input */ + "S" (st0x_dr), "D" (data), "c" (SCint->transfersize) : + /* clobbered */ + "eax", "ecx", "edi"); + + len -= transfersize; + data += transfersize; + +#if (DEBUG & PHASE_DATAIN) + printk("scsi%d: transfered += %d\n", hostno, transfersize); + transfered += transfersize; +#endif + +#if (DEBUG & DEBUG_FAST) + printk("scsi%d : FAST transfer complete len = %d data = %08x\n", + hostno, len, data); +#endif + +} else +#endif +{ + +#if (DEBUG & PHASE_DATAIN) + printk("scsi%d: transfered += %d\n", hostno, len); + transfered += len; /* Assume we'll transfer it all, then + subtract what we *didn't* transfer */ +#endif + +/* + * We loop as long as we are in a data in phase, there is room to read, + * and BSY is still active + */ + + __asm__ ( +/* + Local variables : + ecx = len + edi = data + esi = st0x_cr_sr + ebx = st0x_dr + + Test for room to read +*/ + "\torl %%ecx, %%ecx + jz 2f + + cld + movl " SYMBOL_NAME_STR(st0x_cr_sr) ", %%esi + movl " SYMBOL_NAME_STR(st0x_dr) ", %%ebx + +1: movb (%%esi), %%al\n" +/* + Test for BSY +*/ + + "\ttest $1, %%al + jz 2f\n" + +/* + Test for data in phase - STATUS & REQ_MASK should be REQ_DATAIN, = STAT_IO, which is 4. +*/ + "\tmovb $0xe, %%ah + andb %%al, %%ah + cmpb $0x04, %%ah + jne 2f\n" + +/* + Test for REQ +*/ + "\ttest $0x10, %%al + jz 1b + + movb (%%ebx), %%al + stosb + loop 1b\n" + +"2:\n" + : +/* output */ +"=D" (data), "=c" (len) : +/* input */ +"0" (data), "1" (len) : +/* clobbered */ +"eax","ebx", "esi"); + +#if (DEBUG & PHASE_DATAIN) + printk("scsi%d: transfered -= %d\n", hostno, len); + transfered -= len; /* Since we assumed all of Len got + * transfered, correct our mistake */ +#endif +} + + if (!len && nobuffs) { + --nobuffs; + ++buffer; + len = buffer->length; + data = (unsigned char *) buffer->address; +#if (DEBUG & DEBUG_SG) + printk("scsi%d : next scatter-gather buffer len = %d address = %08x\n", + hostno, len, data); +#endif + } + + break; + + case REQ_CMDOUT : + while (((status_read = STATUS) & STAT_BSY) && + ((status_read & REQ_MASK) == REQ_CMDOUT)) + if (status_read & STAT_REQ) { + DATA = *(const unsigned char *) cmnd; + cmnd = 1+(const unsigned char *) cmnd; +#ifdef SLOW_HANDSHAKE + if (borken) + borken_wait(); +#endif + } + break; + + case REQ_STATIN : + status = DATA; + break; + + case REQ_MSGOUT : +/* + * We can only have sent a MSG OUT if we requested to do this + * by raising ATTN. So, we must drop ATTN. + */ + + CONTROL = BASE_CMD | CMD_DRVR_ENABLE; +/* + * If we are reconnecting, then we must send an IDENTIFY message in + * response to MSGOUT. + */ + switch (reselect) { + case CAN_RECONNECT: + DATA = IDENTIFY(1, lun); + +#if (DEBUG & (PHASE_RESELECT | PHASE_MSGOUT)) + printk("scsi%d : sent IDENTIFY message.\n", hostno); +#endif + break; +#ifdef LINKED + case LINKED_WRONG: + DATA = ABORT; + linked_connected = 0; + reselect = CAN_RECONNECT; + goto connect_loop; +#if (DEBUG & (PHASE_MSGOUT | DEBUG_LINKED)) + printk("scsi%d : sent ABORT message to cancel incorrect I_T_L nexus.\n", hostno); +#endif +#endif /* LINKED */ +#if (DEBUG & DEBUG_LINKED) + printk("correct\n"); +#endif + default: + DATA = NOP; + printk("scsi%d : target %d requested MSGOUT, sent NOP message.\n", hostno, target); + } + break; + + case REQ_MSGIN : + switch (message = DATA) { + case DISCONNECT : + should_reconnect = 1; + current_data = data; /* WDE add */ + current_buffer = buffer; + current_bufflen = len; /* WDE add */ + current_nobuffs = nobuffs; +#ifdef LINKED + linked_connected = 0; +#endif + done=1; +#if (DEBUG & (PHASE_RESELECT | PHASE_MSGIN)) + printk("scsi%d : disconnected.\n", hostno); +#endif + break; + +#ifdef LINKED + case LINKED_CMD_COMPLETE: + case LINKED_FLG_CMD_COMPLETE: +#endif + case COMMAND_COMPLETE : +/* + * Note : we should check for underflow here. + */ +#if (DEBUG & PHASE_MSGIN) + printk("scsi%d : command complete.\n", hostno); +#endif + done = 1; + break; + case ABORT : +#if (DEBUG & PHASE_MSGIN) + printk("scsi%d : abort message.\n", hostno); +#endif + done=1; + break; + case SAVE_POINTERS : + current_buffer = buffer; + current_bufflen = len; /* WDE add */ + current_data = data; /* WDE mod */ + current_nobuffs = nobuffs; +#if (DEBUG & PHASE_MSGIN) + printk("scsi%d : pointers saved.\n", hostno); +#endif + break; + case RESTORE_POINTERS: + buffer=current_buffer; + cmnd=current_cmnd; + data=current_data; /* WDE mod */ + len=current_bufflen; + nobuffs=current_nobuffs; +#if (DEBUG & PHASE_MSGIN) + printk("scsi%d : pointers restored.\n", hostno); +#endif + break; + default: + +/* + * IDENTIFY distinguishes itself from the other messages by setting the + * high byte. + * + * Note : we need to handle at least one outstanding command per LUN, + * and need to hash the SCSI command for that I_T_L nexus based on the + * known ID (at this point) and LUN. + */ + + if (message & 0x80) { +#if (DEBUG & PHASE_MSGIN) + printk("scsi%d : IDENTIFY message received from id %d, lun %d.\n", + hostno, target, message & 7); +#endif + } else { + +/* + * We should go into a MESSAGE OUT phase, and send a MESSAGE_REJECT + * if we run into a message that we don't like. The seagate driver + * needs some serious restructuring first though. + */ + +#if (DEBUG & PHASE_MSGIN) + printk("scsi%d : unknown message %d from target %d.\n", + hostno, message, target); +#endif + } + } + break; + + default : + printk("scsi%d : unknown phase.\n", hostno); + st0x_aborted = DID_ERROR; + } + +#ifdef SLOW_HANDSHAKE +/* + * I really don't care to deal with borken devices in each single + * byte transfer case (ie, message in, message out, status), so + * I'll do the wait here if necessary. + */ + if (borken) + borken_wait(); +#endif + + } /* if ends */ + } /* while ends */ + +#if (DEBUG & (PHASE_DATAIN | PHASE_DATAOUT | PHASE_EXIT)) + printk("scsi%d : Transfered %d bytes\n", hostno, transfered); +#endif + +#if (DEBUG & PHASE_EXIT) +#if 0 /* Doesn't work for scatter / gather */ + printk("Buffer : \n"); + for (i = 0; i < 20; ++i) + printk ("%02x ", ((unsigned char *) data)[i]); /* WDE mod */ + printk("\n"); +#endif + printk("scsi%d : status = ", hostno); + print_status(status); + printk("message = %02x\n", message); +#endif + + +/* We shouldn't reach this until *after* BSY has been deasserted */ +#ifdef notyet + if (st0x_aborted) { + if (STATUS & STAT_BSY) { + seagate_st0x_reset(NULL); + st0x_aborted = DID_RESET; + } + abort_confirm = 1; + } +#endif + +#ifdef LINKED +else { +/* + * Fix the message byte so that unsuspecting high level drivers don't + * puke when they see a LINKED COMMAND message in place of the COMMAND + * COMPLETE they may be expecting. Shouldn't be necessary, but it's + * better to be on the safe side. + * + * A non LINKED* message byte will indicate that the command completed, + * and we are now disconnected. + */ + + switch (message) { + case LINKED_CMD_COMPLETE : + case LINKED_FLG_CMD_COMPLETE : + message = COMMAND_COMPLETE; + linked_target = current_target; + linked_lun = current_lun; + linked_connected = 1; +#if (DEBUG & DEBUG_LINKED) + printk("scsi%d : keeping I_T_L nexus established for linked command.\n", + hostno); +#endif +/* + * We also will need to adjust status to accommodate intermediate conditions. + */ + if ((status == INTERMEDIATE_GOOD) || + (status == INTERMEDIATE_C_GOOD)) + status = GOOD; + + break; +/* + * We should also handle what are "normal" termination messages + * here (ABORT, BUS_DEVICE_RESET?, and COMMAND_COMPLETE individually, + * and flake if things aren't right. + */ + + default : +#if (DEBUG & DEBUG_LINKED) + printk("scsi%d : closing I_T_L nexus.\n", hostno); +#endif + linked_connected = 0; + } + } +#endif /* LINKED */ + + + + + if (should_reconnect) { +#if (DEBUG & PHASE_RESELECT) + printk("scsi%d : exiting seagate_st0x_queue_command() with reconnect enabled.\n", + hostno); +#endif + CONTROL = BASE_CMD | CMD_INTR ; + } else + CONTROL = BASE_CMD; + + return retcode (st0x_aborted); + } + +int seagate_st0x_abort (Scsi_Cmnd * SCpnt) + { + st0x_aborted = DID_ABORT; + + return SCSI_ABORT_PENDING; + } + +/* + the seagate_st0x_reset function resets the SCSI bus +*/ + +int seagate_st0x_reset (Scsi_Cmnd * SCpnt, unsigned int reset_flags) + { + unsigned clock; + /* + No timeouts - this command is going to fail because + it was reset. + */ + +#ifdef DEBUG + printk("In seagate_st0x_reset()\n"); +#endif + + + /* assert RESET signal on SCSI bus. */ + + CONTROL = BASE_CMD | CMD_RST; + clock=jiffies+2; + + + /* Wait. */ + + while (jiffies < clock); + + CONTROL = BASE_CMD; + + st0x_aborted = DID_RESET; + +#ifdef DEBUG + printk("SCSI bus reset.\n"); +#endif + return SCSI_RESET_WAKEUP; + } + +#include <asm/segment.h> +#include "sd.h" +#include <scsi/scsi_ioctl.h> + +int seagate_st0x_biosparam(Disk * disk, kdev_t dev, int* ip) { + unsigned char buf[256 + sizeof(int) * 2], cmd[6], *data, *page; + int *sizes, result, formatted_sectors, total_sectors; + int cylinders, heads, sectors; + int capacity; + +/* + * Only SCSI-I CCS drives and later implement the necessary mode sense + * pages. + */ + + if (disk->device->scsi_level < 2) + return -1; + + sizes = (int *) buf; + data = (unsigned char *) (sizes + 2); + + cmd[0] = MODE_SENSE; + cmd[1] = (disk->device->lun << 5) & 0xe5; + cmd[2] = 0x04; /* Read page 4, rigid disk geometry page current values */ + cmd[3] = 0; + cmd[4] = 255; + cmd[5] = 0; + +/* + * We are transferring 0 bytes in the out direction, and expect to get back + * 24 bytes for each mode page. + */ + + sizes[0] = 0; + sizes[1] = 256; + + memcpy (data, cmd, 6); + + if (!(result = kernel_scsi_ioctl (disk->device, SCSI_IOCTL_SEND_COMMAND, (void *) buf))) { +/* + * The mode page lies beyond the MODE SENSE header, with length 4, and + * the BLOCK DESCRIPTOR, with length header[3]. + */ + + page = data + 4 + data[3]; + heads = (int) page[5]; + cylinders = (page[2] << 16) | (page[3] << 8) | page[4]; + + cmd[2] = 0x03; /* Read page 3, format page current values */ + memcpy (data, cmd, 6); + + if (!(result = kernel_scsi_ioctl (disk->device, SCSI_IOCTL_SEND_COMMAND, (void *) buf))) { + page = data + 4 + data[3]; + sectors = (page[10] << 8) | page[11]; + + +/* + * Get the total number of formatted sectors from the block descriptor, + * so we can tell how many are being used for alternates. + */ + + formatted_sectors = (data[4 + 1] << 16) | (data[4 + 2] << 8) | + data[4 + 3] ; + + total_sectors = (heads * cylinders * sectors); + +/* + * Adjust the real geometry by subtracting + * (spare sectors / (heads * tracks)) cylinders from the number of cylinders. + * + * It appears that the CE cylinder CAN be a partial cylinder. + */ + + +printk("scsi%d : heads = %d cylinders = %d sectors = %d total = %d formatted = %d\n", + hostno, heads, cylinders, sectors, total_sectors, formatted_sectors); + + if (!heads || !sectors || !cylinders) + result = -1; + else + cylinders -= ((total_sectors - formatted_sectors) / (heads * sectors)); + +/* + * Now, we need to do a sanity check on the geometry to see if it is + * BIOS compatible. The maximum BIOS geometry is 1024 cylinders * + * 256 heads * 64 sectors. + */ + + if ((cylinders > 1024) || (sectors > 64)) { + /* The Seagate's seem to have some mapping + * Multiple heads * sectors * cyl to get capacity + * Then start rounding down. */ + capacity = heads * sectors * cylinders; + sectors = 17; /* Old MFM Drives use this, so does the Seagate */ + heads = 2; + capacity = capacity / sectors; + while (cylinders > 1024) + { + heads *= 2; /* For some reason, they go in multiples */ + cylinders = capacity / heads; + } + } + ip[0] = heads; + ip[1] = sectors; + ip[2] = cylinders; + +/* + * There should be an alternate mapping for things the seagate doesn't + * understand, but I couldn't say what it is with reasonable certainty. + */ + + } + } + + return result; +} + +#ifdef MODULE +/* Eventually this will go into an include file, but this will be later */ +Scsi_Host_Template driver_template = SEAGATE_ST0X; + +#include "scsi_module.c" +#endif |