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linux/drivers/scsi/aha1542.c
Bart Van Assche 77168bd721 scsi: aha1542: Declare SCSI host template const 
Make it explicit that the SCSI host template is not modified.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230322195515.1267197-20-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-03-24 19:19:21 -04:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Adaptec AHA-1542 SCSI host adapters
*
* Copyright (C) 1992 Tommy Thorn
* Copyright (C) 1993, 1994, 1995 Eric Youngdale
* Copyright (C) 2015 Ondrej Zary
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/isa.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <asm/dma.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include "aha1542.h"
#define MAXBOARDS 4
static bool isapnp = 1;
module_param(isapnp, bool, 0);
MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");
static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };
module_param_hw_array(io, int, ioport, NULL, 0);
MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");
/* time AHA spends on the AT-bus during data transfer */
static int bus_on[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 11us */
module_param_array(bus_on, int, NULL, 0);
MODULE_PARM_DESC(bus_on, "bus on time [us] (2-15, default=-1 [HW default: 11])");
/* time AHA spends off the bus (not to monopolize it) during data transfer */
static int bus_off[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 4us */
module_param_array(bus_off, int, NULL, 0);
MODULE_PARM_DESC(bus_off, "bus off time [us] (1-64, default=-1 [HW default: 4])");
/* default is jumper selected (J1 on 1542A), factory default = 5 MB/s */
static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };
module_param_array(dma_speed, int, NULL, 0);
MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");
#define BIOS_TRANSLATION_6432 1 /* Default case these days */
#define BIOS_TRANSLATION_25563 2 /* Big disk case */
struct aha1542_hostdata {
/* This will effectively start both of them at the first mailbox */
int bios_translation; /* Mapping bios uses - for compatibility */
int aha1542_last_mbi_used;
int aha1542_last_mbo_used;
struct scsi_cmnd *int_cmds[AHA1542_MAILBOXES];
struct mailbox *mb;
dma_addr_t mb_handle;
struct ccb *ccb;
dma_addr_t ccb_handle;
};
#define AHA1542_MAX_SECTORS 16
struct aha1542_cmd {
/* bounce buffer */
void *data_buffer;
dma_addr_t data_buffer_handle;
};
static inline void aha1542_intr_reset(u16 base)
{
outb(IRST, CONTROL(base));
}
static inline bool wait_mask(u16 port, u8 mask, u8 allof, u8 noneof, int timeout)
{
bool delayed = true;
if (timeout == 0) {
timeout = 3000000;
delayed = false;
}
while (1) {
u8 bits = inb(port) & mask;
if ((bits & allof) == allof && ((bits & noneof) == 0))
break;
if (delayed)
mdelay(1);
if (--timeout == 0)
return false;
}
return true;
}
static int aha1542_outb(unsigned int base, u8 val)
{
if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
return 1;
outb(val, DATA(base));
return 0;
}
static int aha1542_out(unsigned int base, u8 *buf, int len)
{
while (len--) {
if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
return 1;
outb(*buf++, DATA(base));
}
if (!wait_mask(INTRFLAGS(base), INTRMASK, HACC, 0, 0))
return 1;
return 0;
}
/*
* Only used at boot time, so we do not need to worry about latency as much
* here
*/
static int aha1542_in(unsigned int base, u8 *buf, int len, int timeout)
{
while (len--) {
if (!wait_mask(STATUS(base), DF, DF, 0, timeout))
return 1;
*buf++ = inb(DATA(base));
}
return 0;
}
static int makecode(unsigned hosterr, unsigned scsierr)
{
switch (hosterr) {
case 0x0:
case 0xa: /* Linked command complete without error and linked normally */
case 0xb: /* Linked command complete without error, interrupt generated */
hosterr = 0;
break;
case 0x11: /* Selection time out-The initiator selection or target
* reselection was not complete within the SCSI Time out period
*/
hosterr = DID_TIME_OUT;
break;
case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
* than was allocated by the Data Length field or the sum of the
* Scatter / Gather Data Length fields.
*/
case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
* invalid. This usually indicates a software failure.
*/
case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
* This usually indicates a software failure.
*/
case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
* of linked CCB's does not specify the same logical unit number as
* the first.
*/
case 0x18: /* Invalid Target Direction received from Host-The direction of a
* Target Mode CCB was invalid.
*/
case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
* received to service data transfer between the same target LUN
* and initiator SCSI ID in the same direction.
*/
case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
* length segment or invalid segment list boundaries was received.
* A CCB parameter was invalid.
*/
#ifdef DEBUG
printk("Aha1542: %x %x\n", hosterr, scsierr);
#endif
hosterr = DID_ERROR; /* Couldn't find any better */
break;
case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
* phase sequence was requested by the target. The host adapter
* will generate a SCSI Reset Condition, notifying the host with
* a SCRD interrupt
*/
hosterr = DID_RESET;
break;
default:
printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
break;
}
return scsierr | (hosterr << 16);
}
static int aha1542_test_port(struct Scsi_Host *sh)
{
int i;
/* Quick and dirty test for presence of the card. */
if (inb(STATUS(sh->io_port)) == 0xff)
return 0;
/* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
/* In case some other card was probing here, reset interrupts */
aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
outb(SRST | IRST /*|SCRST */ , CONTROL(sh->io_port));
mdelay(20); /* Wait a little bit for things to settle down. */
/* Expect INIT and IDLE, any of the others are bad */
if (!wait_mask(STATUS(sh->io_port), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0))
return 0;
/* Shouldn't have generated any interrupts during reset */
if (inb(INTRFLAGS(sh->io_port)) & INTRMASK)
return 0;
/*
* Perform a host adapter inquiry instead so we do not need to set
* up the mailboxes ahead of time
*/
aha1542_outb(sh->io_port, CMD_INQUIRY);
for (i = 0; i < 4; i++) {
if (!wait_mask(STATUS(sh->io_port), DF, DF, 0, 0))
return 0;
(void)inb(DATA(sh->io_port));
}
/* Reading port should reset DF */
if (inb(STATUS(sh->io_port)) & DF)
return 0;
/* When HACC, command is completed, and we're though testing */
if (!wait_mask(INTRFLAGS(sh->io_port), HACC, HACC, 0, 0))
return 0;
/* Clear interrupts */
outb(IRST, CONTROL(sh->io_port));
return 1;
}
static void aha1542_free_cmd(struct scsi_cmnd *cmd)
{
struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
struct request *rq = scsi_cmd_to_rq(cmd);
void *buf = acmd->data_buffer;
struct req_iterator iter;
struct bio_vec bv;
rq_for_each_segment(bv, rq, iter) {
memcpy_to_bvec(&bv, buf);
buf += bv.bv_len;
}
}
scsi_dma_unmap(cmd);
}
static irqreturn_t aha1542_interrupt(int irq, void *dev_id)
{
struct Scsi_Host *sh = dev_id;
struct aha1542_hostdata *aha1542 = shost_priv(sh);
int errstatus, mbi, mbo, mbistatus;
int number_serviced;
unsigned long flags;
struct scsi_cmnd *tmp_cmd;
int flag;
struct mailbox *mb = aha1542->mb;
struct ccb *ccb = aha1542->ccb;
#ifdef DEBUG
{
flag = inb(INTRFLAGS(sh->io_port));
shost_printk(KERN_DEBUG, sh, "aha1542_intr_handle: ");
if (!(flag & ANYINTR))
printk("no interrupt?");
if (flag & MBIF)
printk("MBIF ");
if (flag & MBOA)
printk("MBOF ");
if (flag & HACC)
printk("HACC ");
if (flag & SCRD)
printk("SCRD ");
printk("status %02x\n", inb(STATUS(sh->io_port)));
}
#endif
number_serviced = 0;
spin_lock_irqsave(sh->host_lock, flags);
while (1) {
flag = inb(INTRFLAGS(sh->io_port));
/*
* Check for unusual interrupts. If any of these happen, we should
* probably do something special, but for now just printing a message
* is sufficient. A SCSI reset detected is something that we really
* need to deal with in some way.
*/
if (flag & ~MBIF) {
if (flag & MBOA)
printk("MBOF ");
if (flag & HACC)
printk("HACC ");
if (flag & SCRD)
printk("SCRD ");
}
aha1542_intr_reset(sh->io_port);
mbi = aha1542->aha1542_last_mbi_used + 1;
if (mbi >= 2 * AHA1542_MAILBOXES)
mbi = AHA1542_MAILBOXES;
do {
if (mb[mbi].status != 0)
break;
mbi++;
if (mbi >= 2 * AHA1542_MAILBOXES)
mbi = AHA1542_MAILBOXES;
} while (mbi != aha1542->aha1542_last_mbi_used);
if (mb[mbi].status == 0) {
spin_unlock_irqrestore(sh->host_lock, flags);
/* Hmm, no mail. Must have read it the last time around */
if (!number_serviced)
shost_printk(KERN_WARNING, sh, "interrupt received, but no mail.\n");
return IRQ_HANDLED;
}
mbo = (scsi2int(mb[mbi].ccbptr) - (unsigned long)aha1542->ccb_handle) / sizeof(struct ccb);
mbistatus = mb[mbi].status;
mb[mbi].status = 0;
aha1542->aha1542_last_mbi_used = mbi;
#ifdef DEBUG
if (ccb[mbo].tarstat | ccb[mbo].hastat)
shost_printk(KERN_DEBUG, sh, "aha1542_command: returning %x (status %d)\n",
ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
#endif
if (mbistatus == 3)
continue; /* Aborted command not found */
#ifdef DEBUG
shost_printk(KERN_DEBUG, sh, "...done %d %d\n", mbo, mbi);
#endif
tmp_cmd = aha1542->int_cmds[mbo];
if (!tmp_cmd) {
spin_unlock_irqrestore(sh->host_lock, flags);
shost_printk(KERN_WARNING, sh, "Unexpected interrupt\n");
shost_printk(KERN_WARNING, sh, "tarstat=%x, hastat=%x idlun=%x ccb#=%d\n", ccb[mbo].tarstat,
ccb[mbo].hastat, ccb[mbo].idlun, mbo);
return IRQ_HANDLED;
}
aha1542_free_cmd(tmp_cmd);
/*
* Fetch the sense data, and tuck it away, in the required slot. The
* Adaptec automatically fetches it, and there is no guarantee that
* we will still have it in the cdb when we come back
*/
if (ccb[mbo].tarstat == 2)
memcpy(tmp_cmd->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
SCSI_SENSE_BUFFERSIZE);
/* is there mail :-) */
/* more error checking left out here */
if (mbistatus != 1)
/* This is surely wrong, but I don't know what's right */
errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
else
errstatus = 0;
#ifdef DEBUG
if (errstatus)
shost_printk(KERN_DEBUG, sh, "(aha1542 error:%x %x %x) ", errstatus,
ccb[mbo].hastat, ccb[mbo].tarstat);
if (ccb[mbo].tarstat == 2)
print_hex_dump_bytes("sense: ", DUMP_PREFIX_NONE, &ccb[mbo].cdb[ccb[mbo].cdblen], 12);
if (errstatus)
printk("aha1542_intr_handle: returning %6x\n", errstatus);
#endif
tmp_cmd->result = errstatus;
aha1542->int_cmds[mbo] = NULL; /* This effectively frees up the mailbox slot, as
* far as queuecommand is concerned
*/
scsi_done(tmp_cmd);
number_serviced++;
}
}
static int aha1542_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
{
struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
struct aha1542_hostdata *aha1542 = shost_priv(sh);
u8 direction;
u8 target = cmd->device->id;
u8 lun = cmd->device->lun;
unsigned long flags;
int bufflen = scsi_bufflen(cmd);
int mbo;
struct mailbox *mb = aha1542->mb;
struct ccb *ccb = aha1542->ccb;
if (*cmd->cmnd == REQUEST_SENSE) {
/* Don't do the command - we have the sense data already */
cmd->result = 0;
scsi_done(cmd);
return 0;
}
#ifdef DEBUG
{
int i = -1;
if (*cmd->cmnd == READ_10 || *cmd->cmnd == WRITE_10)
i = xscsi2int(cmd->cmnd + 2);
else if (*cmd->cmnd == READ_6 || *cmd->cmnd == WRITE_6)
i = scsi2int(cmd->cmnd + 2);
shost_printk(KERN_DEBUG, sh, "aha1542_queuecommand: dev %d cmd %02x pos %d len %d",
target, *cmd->cmnd, i, bufflen);
print_hex_dump_bytes("command: ", DUMP_PREFIX_NONE, cmd->cmnd, cmd->cmd_len);
}
#endif
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
struct request *rq = scsi_cmd_to_rq(cmd);
void *buf = acmd->data_buffer;
struct req_iterator iter;
struct bio_vec bv;
rq_for_each_segment(bv, rq, iter) {
memcpy_from_bvec(buf, &bv);
buf += bv.bv_len;
}
}
/*
* Use the outgoing mailboxes in a round-robin fashion, because this
* is how the host adapter will scan for them
*/
spin_lock_irqsave(sh->host_lock, flags);
mbo = aha1542->aha1542_last_mbo_used + 1;
if (mbo >= AHA1542_MAILBOXES)
mbo = 0;
do {
if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
break;
mbo++;
if (mbo >= AHA1542_MAILBOXES)
mbo = 0;
} while (mbo != aha1542->aha1542_last_mbo_used);
if (mb[mbo].status || aha1542->int_cmds[mbo])
panic("Unable to find empty mailbox for aha1542.\n");
aha1542->int_cmds[mbo] = cmd; /* This will effectively prevent someone else from
* screwing with this cdb.
*/
aha1542->aha1542_last_mbo_used = mbo;
#ifdef DEBUG
shost_printk(KERN_DEBUG, sh, "Sending command (%d)...", mbo);
#endif
/* This gets trashed for some reason */
any2scsi(mb[mbo].ccbptr, aha1542->ccb_handle + mbo * sizeof(*ccb));
memset(&ccb[mbo], 0, sizeof(struct ccb));
ccb[mbo].cdblen = cmd->cmd_len;
direction = 0;
if (*cmd->cmnd == READ_10 || *cmd->cmnd == READ_6)
direction = 8;
else if (*cmd->cmnd == WRITE_10 || *cmd->cmnd == WRITE_6)
direction = 16;
memcpy(ccb[mbo].cdb, cmd->cmnd, ccb[mbo].cdblen);
ccb[mbo].op = 0; /* SCSI Initiator Command */
any2scsi(ccb[mbo].datalen, bufflen);
if (bufflen)
any2scsi(ccb[mbo].dataptr, acmd->data_buffer_handle);
else
any2scsi(ccb[mbo].dataptr, 0);
ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
ccb[mbo].rsalen = 16;
ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
ccb[mbo].commlinkid = 0;
#ifdef DEBUG
print_hex_dump_bytes("sending: ", DUMP_PREFIX_NONE, &ccb[mbo], sizeof(ccb[mbo]) - 10);
printk("aha1542_queuecommand: now waiting for interrupt ");
#endif
mb[mbo].status = 1;
aha1542_outb(cmd->device->host->io_port, CMD_START_SCSI);
spin_unlock_irqrestore(sh->host_lock, flags);
return 0;
}
/* Initialize mailboxes */
static void setup_mailboxes(struct Scsi_Host *sh)
{
struct aha1542_hostdata *aha1542 = shost_priv(sh);
u8 mb_cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
int i;
for (i = 0; i < AHA1542_MAILBOXES; i++) {
aha1542->mb[i].status = 0;
any2scsi(aha1542->mb[i].ccbptr,
aha1542->ccb_handle + i * sizeof(struct ccb));
aha1542->mb[AHA1542_MAILBOXES + i].status = 0;
}
aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
any2scsi(mb_cmd + 2, aha1542->mb_handle);
if (aha1542_out(sh->io_port, mb_cmd, 5))
shost_printk(KERN_ERR, sh, "failed setting up mailboxes\n");
aha1542_intr_reset(sh->io_port);
}
static int aha1542_getconfig(struct Scsi_Host *sh)
{
u8 inquiry_result[3];
int i;
i = inb(STATUS(sh->io_port));
if (i & DF) {
i = inb(DATA(sh->io_port));
}
aha1542_outb(sh->io_port, CMD_RETCONF);
aha1542_in(sh->io_port, inquiry_result, 3, 0);
if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
shost_printk(KERN_ERR, sh, "error querying board settings\n");
aha1542_intr_reset(sh->io_port);
switch (inquiry_result[0]) {
case 0x80:
sh->dma_channel = 7;
break;
case 0x40:
sh->dma_channel = 6;
break;
case 0x20:
sh->dma_channel = 5;
break;
case 0x01:
sh->dma_channel = 0;
break;
case 0:
/*
* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
* Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this.
*/
sh->dma_channel = 0xFF;
break;
default:
shost_printk(KERN_ERR, sh, "Unable to determine DMA channel.\n");
return -1;
}
switch (inquiry_result[1]) {
case 0x40:
sh->irq = 15;
break;
case 0x20:
sh->irq = 14;
break;
case 0x8:
sh->irq = 12;
break;
case 0x4:
sh->irq = 11;
break;
case 0x2:
sh->irq = 10;
break;
case 0x1:
sh->irq = 9;
break;
default:
shost_printk(KERN_ERR, sh, "Unable to determine IRQ level.\n");
return -1;
}
sh->this_id = inquiry_result[2] & 7;
return 0;
}
/*
* This function should only be called for 1542C boards - we can detect
* the special firmware settings and unlock the board
*/
static int aha1542_mbenable(struct Scsi_Host *sh)
{
static u8 mbenable_cmd[3];
static u8 mbenable_result[2];
int retval;
retval = BIOS_TRANSLATION_6432;
aha1542_outb(sh->io_port, CMD_EXTBIOS);
if (aha1542_in(sh->io_port, mbenable_result, 2, 100))
return retval;
if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 100))
goto fail;
aha1542_intr_reset(sh->io_port);
if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
mbenable_cmd[0] = CMD_MBENABLE;
mbenable_cmd[1] = 0;
mbenable_cmd[2] = mbenable_result[1];
if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
retval = BIOS_TRANSLATION_25563;
if (aha1542_out(sh->io_port, mbenable_cmd, 3))
goto fail;
}
while (0) {
fail:
shost_printk(KERN_ERR, sh, "Mailbox init failed\n");
}
aha1542_intr_reset(sh->io_port);
return retval;
}
/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
static int aha1542_query(struct Scsi_Host *sh)
{
struct aha1542_hostdata *aha1542 = shost_priv(sh);
u8 inquiry_result[4];
int i;
i = inb(STATUS(sh->io_port));
if (i & DF) {
i = inb(DATA(sh->io_port));
}
aha1542_outb(sh->io_port, CMD_INQUIRY);
aha1542_in(sh->io_port, inquiry_result, 4, 0);
if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
shost_printk(KERN_ERR, sh, "error querying card type\n");
aha1542_intr_reset(sh->io_port);
aha1542->bios_translation = BIOS_TRANSLATION_6432; /* Default case */
/*
* For an AHA1740 series board, we ignore the board since there is a
* hardware bug which can lead to wrong blocks being returned if the board
* is operating in the 1542 emulation mode. Since there is an extended mode
* driver, we simply ignore the board and let the 1740 driver pick it up.
*/
if (inquiry_result[0] == 0x43) {
shost_printk(KERN_INFO, sh, "Emulation mode not supported for AHA-1740 hardware, use aha1740 driver instead.\n");
return 1;
}
/*
* Always call this - boards that do not support extended bios translation
* will ignore the command, and we will set the proper default
*/
aha1542->bios_translation = aha1542_mbenable(sh);
return 0;
}
static u8 dma_speed_hw(int dma_speed)
{
switch (dma_speed) {
case 5:
return 0x00;
case 6:
return 0x04;
case 7:
return 0x01;
case 8:
return 0x02;
case 10:
return 0x03;
}
return 0xff; /* invalid */
}
/* Set the Bus on/off-times as not to ruin floppy performance */
static void aha1542_set_bus_times(struct Scsi_Host *sh, int bus_on, int bus_off, int dma_speed)
{
if (bus_on > 0) {
u8 oncmd[] = { CMD_BUSON_TIME, clamp(bus_on, 2, 15) };
aha1542_intr_reset(sh->io_port);
if (aha1542_out(sh->io_port, oncmd, 2))
goto fail;
}
if (bus_off > 0) {
u8 offcmd[] = { CMD_BUSOFF_TIME, clamp(bus_off, 1, 64) };
aha1542_intr_reset(sh->io_port);
if (aha1542_out(sh->io_port, offcmd, 2))
goto fail;
}
if (dma_speed_hw(dma_speed) != 0xff) {
u8 dmacmd[] = { CMD_DMASPEED, dma_speed_hw(dma_speed) };
aha1542_intr_reset(sh->io_port);
if (aha1542_out(sh->io_port, dmacmd, 2))
goto fail;
}
aha1542_intr_reset(sh->io_port);
return;
fail:
shost_printk(KERN_ERR, sh, "setting bus on/off-time failed\n");
aha1542_intr_reset(sh->io_port);
}
/* return non-zero on detection */
static struct Scsi_Host *aha1542_hw_init(const struct scsi_host_template *tpnt,
struct device *pdev, int indx)
{
unsigned int base_io = io[indx];
struct Scsi_Host *sh;
struct aha1542_hostdata *aha1542;
char dma_info[] = "no DMA";
if (base_io == 0)
return NULL;
if (!request_region(base_io, AHA1542_REGION_SIZE, "aha1542"))
return NULL;
sh = scsi_host_alloc(tpnt, sizeof(struct aha1542_hostdata));
if (!sh)
goto release;
aha1542 = shost_priv(sh);
sh->unique_id = base_io;
sh->io_port = base_io;
sh->n_io_port = AHA1542_REGION_SIZE;
aha1542->aha1542_last_mbi_used = 2 * AHA1542_MAILBOXES - 1;
aha1542->aha1542_last_mbo_used = AHA1542_MAILBOXES - 1;
if (!aha1542_test_port(sh))
goto unregister;
aha1542_set_bus_times(sh, bus_on[indx], bus_off[indx], dma_speed[indx]);
if (aha1542_query(sh))
goto unregister;
if (aha1542_getconfig(sh) == -1)
goto unregister;
if (sh->dma_channel != 0xFF)
snprintf(dma_info, sizeof(dma_info), "DMA %d", sh->dma_channel);
shost_printk(KERN_INFO, sh, "Adaptec AHA-1542 (SCSI-ID %d) at IO 0x%x, IRQ %d, %s\n",
sh->this_id, base_io, sh->irq, dma_info);
if (aha1542->bios_translation == BIOS_TRANSLATION_25563)
shost_printk(KERN_INFO, sh, "Using extended bios translation\n");
if (dma_set_mask_and_coherent(pdev, DMA_BIT_MASK(24)) < 0)
goto unregister;
aha1542->mb = dma_alloc_coherent(pdev,
AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
&aha1542->mb_handle, GFP_KERNEL);
if (!aha1542->mb)
goto unregister;
aha1542->ccb = dma_alloc_coherent(pdev,
AHA1542_MAILBOXES * sizeof(struct ccb),
&aha1542->ccb_handle, GFP_KERNEL);
if (!aha1542->ccb)
goto free_mb;
setup_mailboxes(sh);
if (request_irq(sh->irq, aha1542_interrupt, 0, "aha1542", sh)) {
shost_printk(KERN_ERR, sh, "Unable to allocate IRQ.\n");
goto free_ccb;
}
if (sh->dma_channel != 0xFF) {
if (request_dma(sh->dma_channel, "aha1542")) {
shost_printk(KERN_ERR, sh, "Unable to allocate DMA channel.\n");
goto free_irq;
}
if (sh->dma_channel == 0 || sh->dma_channel >= 5) {
set_dma_mode(sh->dma_channel, DMA_MODE_CASCADE);
enable_dma(sh->dma_channel);
}
}
if (scsi_add_host(sh, pdev))
goto free_dma;
scsi_scan_host(sh);
return sh;
free_dma:
if (sh->dma_channel != 0xff)
free_dma(sh->dma_channel);
free_irq:
free_irq(sh->irq, sh);
free_ccb:
dma_free_coherent(pdev, AHA1542_MAILBOXES * sizeof(struct ccb),
aha1542->ccb, aha1542->ccb_handle);
free_mb:
dma_free_coherent(pdev, AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
aha1542->mb, aha1542->mb_handle);
unregister:
scsi_host_put(sh);
release:
release_region(base_io, AHA1542_REGION_SIZE);
return NULL;
}
static int aha1542_release(struct Scsi_Host *sh)
{
struct aha1542_hostdata *aha1542 = shost_priv(sh);
struct device *dev = sh->dma_dev;
scsi_remove_host(sh);
if (sh->dma_channel != 0xff)
free_dma(sh->dma_channel);
dma_free_coherent(dev, AHA1542_MAILBOXES * sizeof(struct ccb),
aha1542->ccb, aha1542->ccb_handle);
dma_free_coherent(dev, AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
aha1542->mb, aha1542->mb_handle);
if (sh->irq)
free_irq(sh->irq, sh);
if (sh->io_port && sh->n_io_port)
release_region(sh->io_port, sh->n_io_port);
scsi_host_put(sh);
return 0;
}
/*
* This is a device reset. This is handled by sending a special command
* to the device.
*/
static int aha1542_dev_reset(struct scsi_cmnd *cmd)
{
struct Scsi_Host *sh = cmd->device->host;
struct aha1542_hostdata *aha1542 = shost_priv(sh);
unsigned long flags;
struct mailbox *mb = aha1542->mb;
u8 target = cmd->device->id;
u8 lun = cmd->device->lun;
int mbo;
struct ccb *ccb = aha1542->ccb;
spin_lock_irqsave(sh->host_lock, flags);
mbo = aha1542->aha1542_last_mbo_used + 1;
if (mbo >= AHA1542_MAILBOXES)
mbo = 0;
do {
if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
break;
mbo++;
if (mbo >= AHA1542_MAILBOXES)
mbo = 0;
} while (mbo != aha1542->aha1542_last_mbo_used);
if (mb[mbo].status || aha1542->int_cmds[mbo])
panic("Unable to find empty mailbox for aha1542.\n");
aha1542->int_cmds[mbo] = cmd; /* This will effectively
* prevent someone else from
* screwing with this cdb.
*/
aha1542->aha1542_last_mbo_used = mbo;
/* This gets trashed for some reason */
any2scsi(mb[mbo].ccbptr, aha1542->ccb_handle + mbo * sizeof(*ccb));
memset(&ccb[mbo], 0, sizeof(struct ccb));
ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
ccb[mbo].commlinkid = 0;
/*
* Now tell the 1542 to flush all pending commands for this
* target
*/
aha1542_outb(sh->io_port, CMD_START_SCSI);
spin_unlock_irqrestore(sh->host_lock, flags);
scmd_printk(KERN_WARNING, cmd,
"Trying device reset for target\n");
return SUCCESS;
}
static int aha1542_reset(struct scsi_cmnd *cmd, u8 reset_cmd)
{
struct Scsi_Host *sh = cmd->device->host;
struct aha1542_hostdata *aha1542 = shost_priv(sh);
unsigned long flags;
int i;
spin_lock_irqsave(sh->host_lock, flags);
/*
* This does a scsi reset for all devices on the bus.
* In principle, we could also reset the 1542 - should
* we do this? Try this first, and we can add that later
* if it turns out to be useful.
*/
outb(reset_cmd, CONTROL(cmd->device->host->io_port));
if (!wait_mask(STATUS(cmd->device->host->io_port),
STATMASK, IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0)) {
spin_unlock_irqrestore(sh->host_lock, flags);
return FAILED;
}
/*
* We need to do this too before the 1542 can interact with
* us again after host reset.
*/
if (reset_cmd & HRST)
setup_mailboxes(cmd->device->host);
/*
* Now try to pick up the pieces. For all pending commands,
* free any internal data structures, and basically clear things
* out. We do not try and restart any commands or anything -
* the strategy handler takes care of that crap.
*/
shost_printk(KERN_WARNING, cmd->device->host, "Sent BUS RESET to scsi host %d\n", cmd->device->host->host_no);
for (i = 0; i < AHA1542_MAILBOXES; i++) {
if (aha1542->int_cmds[i] != NULL) {
struct scsi_cmnd *tmp_cmd;
tmp_cmd = aha1542->int_cmds[i];
if (tmp_cmd->device->soft_reset) {
/*
* If this device implements the soft reset option,
* then it is still holding onto the command, and
* may yet complete it. In this case, we don't
* flush the data.
*/
continue;
}
aha1542_free_cmd(tmp_cmd);
aha1542->int_cmds[i] = NULL;
aha1542->mb[i].status = 0;
}
}
spin_unlock_irqrestore(sh->host_lock, flags);
return SUCCESS;
}
static int aha1542_bus_reset(struct scsi_cmnd *cmd)
{
return aha1542_reset(cmd, SCRST);
}
static int aha1542_host_reset(struct scsi_cmnd *cmd)
{
return aha1542_reset(cmd, HRST | SCRST);
}
static int aha1542_biosparam(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int geom[])
{
struct aha1542_hostdata *aha1542 = shost_priv(sdev->host);
if (capacity >= 0x200000 &&
aha1542->bios_translation == BIOS_TRANSLATION_25563) {
/* Please verify that this is the same as what DOS returns */
geom[0] = 255; /* heads */
geom[1] = 63; /* sectors */
} else {
geom[0] = 64; /* heads */
geom[1] = 32; /* sectors */
}
geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */
return 0;
}
MODULE_LICENSE("GPL");
static int aha1542_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
{
struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
acmd->data_buffer = dma_alloc_coherent(shost->dma_dev,
SECTOR_SIZE * AHA1542_MAX_SECTORS,
&acmd->data_buffer_handle, GFP_KERNEL);
if (!acmd->data_buffer)
return -ENOMEM;
return 0;
}
static int aha1542_exit_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
{
struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
dma_free_coherent(shost->dma_dev, SECTOR_SIZE * AHA1542_MAX_SECTORS,
acmd->data_buffer, acmd->data_buffer_handle);
return 0;
}
static const struct scsi_host_template driver_template = {
.module = THIS_MODULE,
.proc_name = "aha1542",
.name = "Adaptec 1542",
.cmd_size = sizeof(struct aha1542_cmd),
.queuecommand = aha1542_queuecommand,
.eh_device_reset_handler= aha1542_dev_reset,
.eh_bus_reset_handler = aha1542_bus_reset,
.eh_host_reset_handler = aha1542_host_reset,
.bios_param = aha1542_biosparam,
.init_cmd_priv = aha1542_init_cmd_priv,
.exit_cmd_priv = aha1542_exit_cmd_priv,
.can_queue = AHA1542_MAILBOXES,
.this_id = 7,
.max_sectors = AHA1542_MAX_SECTORS,
.sg_tablesize = SG_ALL,
};
static int aha1542_isa_match(struct device *pdev, unsigned int ndev)
{
struct Scsi_Host *sh = aha1542_hw_init(&driver_template, pdev, ndev);
if (!sh)
return 0;
dev_set_drvdata(pdev, sh);
return 1;
}
static void aha1542_isa_remove(struct device *pdev,
unsigned int ndev)
{
aha1542_release(dev_get_drvdata(pdev));
dev_set_drvdata(pdev, NULL);
}
static struct isa_driver aha1542_isa_driver = {
.match = aha1542_isa_match,
.remove = aha1542_isa_remove,
.driver = {
.name = "aha1542"
},
};
static int isa_registered;
#ifdef CONFIG_PNP
static const struct pnp_device_id aha1542_pnp_ids[] = {
{ .id = "ADP1542" },
{ .id = "" }
};
MODULE_DEVICE_TABLE(pnp, aha1542_pnp_ids);
static int aha1542_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)
{
int indx;
struct Scsi_Host *sh;
for (indx = 0; indx < ARRAY_SIZE(io); indx++) {
if (io[indx])
continue;
if (pnp_activate_dev(pdev) < 0)
continue;
io[indx] = pnp_port_start(pdev, 0);
/*
* The card can be queried for its DMA, we have
* the DMA set up that is enough
*/
dev_info(&pdev->dev, "ISAPnP found an AHA1535 at I/O 0x%03X", io[indx]);
}
sh = aha1542_hw_init(&driver_template, &pdev->dev, indx);
if (!sh)
return -ENODEV;
pnp_set_drvdata(pdev, sh);
return 0;
}
static void aha1542_pnp_remove(struct pnp_dev *pdev)
{
aha1542_release(pnp_get_drvdata(pdev));
pnp_set_drvdata(pdev, NULL);
}
static struct pnp_driver aha1542_pnp_driver = {
.name = "aha1542",
.id_table = aha1542_pnp_ids,
.probe = aha1542_pnp_probe,
.remove = aha1542_pnp_remove,
};
static int pnp_registered;
#endif /* CONFIG_PNP */
static int __init aha1542_init(void)
{
int ret = 0;
#ifdef CONFIG_PNP
if (isapnp) {
ret = pnp_register_driver(&aha1542_pnp_driver);
if (!ret)
pnp_registered = 1;
}
#endif
ret = isa_register_driver(&aha1542_isa_driver, MAXBOARDS);
if (!ret)
isa_registered = 1;
#ifdef CONFIG_PNP
if (pnp_registered)
ret = 0;
#endif
if (isa_registered)
ret = 0;
return ret;
}
static void __exit aha1542_exit(void)
{
#ifdef CONFIG_PNP
if (pnp_registered)
pnp_unregister_driver(&aha1542_pnp_driver);
#endif
if (isa_registered)
isa_unregister_driver(&aha1542_isa_driver);
}
module_init(aha1542_init);
module_exit(aha1542_exit);
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