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linux/drivers/scsi/sym53c416.c
James Bottomley c958d767dc [SCSI] sym53c416: fix module parameters 
It looks like there's been a bug in the module parameter setup forever.
The upshot doesn't really matter, because even if no parameters are ever
set, we just call sym53c416_setup() three times, but the zero values in
the arrays eventually cause nothing to happen.  Unfortunately gcc has
started to notice this now too:

drivers/scsi/sym53c416.c: In function 'sym53c416_detect':
drivers/scsi/sym53c416.c:624: warning: the address of 'sym53c416' will always evaluate as 'true'
drivers/scsi/sym53c416.c:630: warning: the address of 'sym53c416_1' will always evaluate as 'true'
drivers/scsi/sym53c416.c:636: warning: the address of 'sym53c416_2' will always evaluate as 'true'
drivers/scsi/sym53c416.c:642: warning: the address of 'sym53c416_3' will always evaluate as 'true'

So fix this longstanding bug to keep gcc quiet.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-02-12 15:24:58 -06:00

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/*
* sym53c416.c
* Low-level SCSI driver for sym53c416 chip.
* Copyright (C) 1998 Lieven Willems (lw_linux@hotmail.com)
*
* Changes :
*
* Marcelo Tosatti <marcelo@conectiva.com.br> : Added io_request_lock locking
* Alan Cox <alan@redhat.com> : Cleaned up code formatting
* Fixed an irq locking bug
* Added ISAPnP support
* Bjoern A. Zeeb <bzeeb@zabbadoz.net> : Initial irq locking updates
* Added another card with ISAPnP support
*
* LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <asm/dma.h>
#include <asm/system.h>
#include <asm/io.h>
#include <linux/blkdev.h>
#include <linux/isapnp.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "sym53c416.h"
#define VERSION_STRING "Version 1.0.0-ac"
#define TC_LOW 0x00 /* Transfer counter low */
#define TC_MID 0x01 /* Transfer counter mid */
#define SCSI_FIFO 0x02 /* SCSI FIFO register */
#define COMMAND_REG 0x03 /* Command Register */
#define STATUS_REG 0x04 /* Status Register (READ) */
#define DEST_BUS_ID 0x04 /* Destination Bus ID (WRITE) */
#define INT_REG 0x05 /* Interrupt Register (READ) */
#define TOM 0x05 /* Time out multiplier (WRITE) */
#define STP 0x06 /* Synchronous Transfer period */
#define SYNC_OFFSET 0x07 /* Synchronous Offset */
#define CONF_REG_1 0x08 /* Configuration register 1 */
#define CONF_REG_2 0x0B /* Configuration register 2 */
#define CONF_REG_3 0x0C /* Configuration register 3 */
#define CONF_REG_4 0x0D /* Configuration register 4 */
#define TC_HIGH 0x0E /* Transfer counter high */
#define PIO_FIFO_1 0x10 /* PIO FIFO register 1 */
#define PIO_FIFO_2 0x11 /* PIO FIFO register 2 */
#define PIO_FIFO_3 0x12 /* PIO FIFO register 3 */
#define PIO_FIFO_4 0x13 /* PIO FIFO register 4 */
#define PIO_FIFO_CNT 0x14 /* PIO FIFO count */
#define PIO_INT_REG 0x15 /* PIO interrupt register */
#define CONF_REG_5 0x16 /* Configuration register 5 */
#define FEATURE_EN 0x1D /* Feature Enable register */
/* Configuration register 1 entries: */
/* Bits 2-0: SCSI ID of host adapter */
#define SCM 0x80 /* Slow Cable Mode */
#define SRID 0x40 /* SCSI Reset Interrupt Disable */
#define PTM 0x20 /* Parity Test Mode */
#define EPC 0x10 /* Enable Parity Checking */
#define CTME 0x08 /* Special Test Mode */
/* Configuration register 2 entries: */
#define FE 0x40 /* Features Enable */
#define SCSI2 0x08 /* SCSI 2 Enable */
#define TBPA 0x04 /* Target Bad Parity Abort */
/* Configuration register 3 entries: */
#define IDMRC 0x80 /* ID Message Reserved Check */
#define QTE 0x40 /* Queue Tag Enable */
#define CDB10 0x20 /* Command Descriptor Block 10 */
#define FSCSI 0x10 /* FastSCSI */
#define FCLK 0x08 /* FastClock */
/* Configuration register 4 entries: */
#define RBS 0x08 /* Register bank select */
#define EAN 0x04 /* Enable Active Negotiation */
/* Configuration register 5 entries: */
#define LPSR 0x80 /* Lower Power SCSI Reset */
#define IE 0x20 /* Interrupt Enable */
#define LPM 0x02 /* Low Power Mode */
#define WSE0 0x01 /* 0WS Enable */
/* Interrupt register entries: */
#define SRST 0x80 /* SCSI Reset */
#define ILCMD 0x40 /* Illegal Command */
#define DIS 0x20 /* Disconnect */
#define BS 0x10 /* Bus Service */
#define FC 0x08 /* Function Complete */
#define RESEL 0x04 /* Reselected */
#define SI 0x03 /* Selection Interrupt */
/* Status Register Entries: */
#define SCI 0x80 /* SCSI Core Int */
#define GE 0x40 /* Gross Error */
#define PE 0x20 /* Parity Error */
#define TC 0x10 /* Terminal Count */
#define VGC 0x08 /* Valid Group Code */
#define PHBITS 0x07 /* Phase bits */
/* PIO Interrupt Register Entries: */
#define SCI 0x80 /* SCSI Core Int */
#define PFI 0x40 /* PIO FIFO Interrupt */
#define FULL 0x20 /* PIO FIFO Full */
#define EMPTY 0x10 /* PIO FIFO Empty */
#define CE 0x08 /* Collision Error */
#define OUE 0x04 /* Overflow / Underflow error */
#define FIE 0x02 /* Full Interrupt Enable */
#define EIE 0x01 /* Empty Interrupt Enable */
/* SYM53C416 SCSI phases (lower 3 bits of SYM53C416_STATUS_REG) */
#define PHASE_DATA_OUT 0x00
#define PHASE_DATA_IN 0x01
#define PHASE_COMMAND 0x02
#define PHASE_STATUS 0x03
#define PHASE_RESERVED_1 0x04
#define PHASE_RESERVED_2 0x05
#define PHASE_MESSAGE_OUT 0x06
#define PHASE_MESSAGE_IN 0x07
/* SYM53C416 core commands */
#define NOOP 0x00
#define FLUSH_FIFO 0x01
#define RESET_CHIP 0x02
#define RESET_SCSI_BUS 0x03
#define DISABLE_SEL_RESEL 0x45
#define RESEL_SEQ 0x40
#define SEL_WITHOUT_ATN_SEQ 0x41
#define SEL_WITH_ATN_SEQ 0x42
#define SEL_WITH_ATN_AND_STOP_SEQ 0x43
#define ENABLE_SEL_RESEL 0x44
#define SEL_WITH_ATN3_SEQ 0x46
#define RESEL3_SEQ 0x47
#define SND_MSG 0x20
#define SND_STAT 0x21
#define SND_DATA 0x22
#define DISCONNECT_SEQ 0x23
#define TERMINATE_SEQ 0x24
#define TARGET_COMM_COMPLETE_SEQ 0x25
#define DISCONN 0x27
#define RECV_MSG_SEQ 0x28
#define RECV_CMD 0x29
#define RECV_DATA 0x2A
#define RECV_CMD_SEQ 0x2B
#define TARGET_ABORT_PIO 0x04
#define TRANSFER_INFORMATION 0x10
#define INIT_COMM_COMPLETE_SEQ 0x11
#define MSG_ACCEPTED 0x12
#define TRANSFER_PAD 0x18
#define SET_ATN 0x1A
#define RESET_ATN 0x1B
#define ILLEGAL 0xFF
#define PIO_MODE 0x80
#define IO_RANGE 0x20 /* 0x00 - 0x1F */
#define ID "sym53c416" /* Attention: copied to the sym53c416.h */
#define PIO_SIZE 128 /* Size of PIO fifo is 128 bytes */
#define READ_TIMEOUT 150
#define WRITE_TIMEOUT 150
#ifdef MODULE
#define sym53c416_base sym53c416
#define sym53c416_base_1 sym53c416_1
#define sym53c416_base_2 sym53c416_2
#define sym53c416_base_3 sym53c416_3
static unsigned int sym53c416_base[2];
static unsigned int sym53c416_base_1[2];
static unsigned int sym53c416_base_2[2];
static unsigned int sym53c416_base_3[2];
#endif
#define MAXHOSTS 4
#define SG_ADDRESS(buffer) ((char *) sg_virt((buffer)))
enum phases
{
idle,
data_out,
data_in,
command_ph,
status_ph,
message_out,
message_in
};
typedef struct
{
int base;
int irq;
int scsi_id;
} host;
static host hosts[MAXHOSTS] = {
{0, 0, SYM53C416_SCSI_ID},
{0, 0, SYM53C416_SCSI_ID},
{0, 0, SYM53C416_SCSI_ID},
{0, 0, SYM53C416_SCSI_ID}
};
static int host_index = 0;
static char info[120];
static Scsi_Cmnd *current_command = NULL;
static int fastpio = 1;
static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
static void sym53c416_set_transfer_counter(int base, unsigned int len)
{
/* Program Transfer Counter */
outb(len & 0x0000FF, base + TC_LOW);
outb((len & 0x00FF00) >> 8, base + TC_MID);
outb((len & 0xFF0000) >> 16, base + TC_HIGH);
}
static DEFINE_SPINLOCK(sym53c416_lock);
/* Returns the number of bytes read */
static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
{
unsigned int orig_len = len;
unsigned long flags = 0;
unsigned int bytes_left;
unsigned long i;
int timeout = READ_TIMEOUT;
/* Do transfer */
spin_lock_irqsave(&sym53c416_lock, flags);
while(len && timeout)
{
bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
if(fastpio && bytes_left > 3)
{
insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
buffer += bytes_left & 0xFC;
len -= bytes_left & 0xFC;
}
else if(bytes_left > 0)
{
len -= bytes_left;
for(; bytes_left > 0; bytes_left--)
*(buffer++) = inb(base + PIO_FIFO_1);
}
else
{
i = jiffies + timeout;
spin_unlock_irqrestore(&sym53c416_lock, flags);
while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
if(inb(base + PIO_INT_REG) & SCI)
timeout = 0;
spin_lock_irqsave(&sym53c416_lock, flags);
if(inb(base + PIO_INT_REG) & EMPTY)
timeout = 0;
}
}
spin_unlock_irqrestore(&sym53c416_lock, flags);
return orig_len - len;
}
/* Returns the number of bytes written */
static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
{
unsigned int orig_len = len;
unsigned long flags = 0;
unsigned int bufferfree;
unsigned long i;
unsigned int timeout = WRITE_TIMEOUT;
/* Do transfer */
spin_lock_irqsave(&sym53c416_lock, flags);
while(len && timeout)
{
bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
if(bufferfree > len)
bufferfree = len;
if(fastpio && bufferfree > 3)
{
outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
buffer += bufferfree & 0xFC;
len -= bufferfree & 0xFC;
}
else if(bufferfree > 0)
{
len -= bufferfree;
for(; bufferfree > 0; bufferfree--)
outb(*(buffer++), base + PIO_FIFO_1);
}
else
{
i = jiffies + timeout;
spin_unlock_irqrestore(&sym53c416_lock, flags);
while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & FULL) && timeout)
;
spin_lock_irqsave(&sym53c416_lock, flags);
if(inb(base + PIO_INT_REG) & FULL)
timeout = 0;
}
}
spin_unlock_irqrestore(&sym53c416_lock, flags);
return orig_len - len;
}
static irqreturn_t sym53c416_intr_handle(int irq, void *dev_id)
{
struct Scsi_Host *dev = dev_id;
int base = dev->io_port;
int i;
unsigned long flags = 0;
unsigned char status_reg, pio_int_reg, int_reg;
struct scatterlist *sg;
unsigned int tot_trans = 0;
spin_lock_irqsave(dev->host_lock,flags);
status_reg = inb(base + STATUS_REG);
pio_int_reg = inb(base + PIO_INT_REG);
int_reg = inb(base + INT_REG);
spin_unlock_irqrestore(dev->host_lock, flags);
/* First, we handle error conditions */
if(int_reg & SCI) /* SCSI Reset */
{
printk(KERN_DEBUG "sym53c416: Reset received\n");
current_command->SCp.phase = idle;
current_command->result = DID_RESET << 16;
spin_lock_irqsave(dev->host_lock, flags);
current_command->scsi_done(current_command);
spin_unlock_irqrestore(dev->host_lock, flags);
goto out;
}
if(int_reg & ILCMD) /* Illegal Command */
{
printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
current_command->SCp.phase = idle;
current_command->result = DID_ERROR << 16;
spin_lock_irqsave(dev->host_lock, flags);
current_command->scsi_done(current_command);
spin_unlock_irqrestore(dev->host_lock, flags);
goto out;
}
if(status_reg & GE) /* Gross Error */
{
printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
current_command->SCp.phase = idle;
current_command->result = DID_ERROR << 16;
spin_lock_irqsave(dev->host_lock, flags);
current_command->scsi_done(current_command);
spin_unlock_irqrestore(dev->host_lock, flags);
goto out;
}
if(status_reg & PE) /* Parity Error */
{
printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
current_command->SCp.phase = idle;
current_command->result = DID_PARITY << 16;
spin_lock_irqsave(dev->host_lock, flags);
current_command->scsi_done(current_command);
spin_unlock_irqrestore(dev->host_lock, flags);
goto out;
}
if(pio_int_reg & (CE | OUE))
{
printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
current_command->SCp.phase = idle;
current_command->result = DID_ERROR << 16;
spin_lock_irqsave(dev->host_lock, flags);
current_command->scsi_done(current_command);
spin_unlock_irqrestore(dev->host_lock, flags);
goto out;
}
if(int_reg & DIS) /* Disconnect */
{
if(current_command->SCp.phase != message_in)
current_command->result = DID_NO_CONNECT << 16;
else
current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
current_command->SCp.phase = idle;
spin_lock_irqsave(dev->host_lock, flags);
current_command->scsi_done(current_command);
spin_unlock_irqrestore(dev->host_lock, flags);
goto out;
}
/* Now we handle SCSI phases */
switch(status_reg & PHBITS) /* Filter SCSI phase out of status reg */
{
case PHASE_DATA_OUT:
{
if(int_reg & BS)
{
current_command->SCp.phase = data_out;
outb(FLUSH_FIFO, base + COMMAND_REG);
sym53c416_set_transfer_counter(base,
scsi_bufflen(current_command));
outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
scsi_for_each_sg(current_command,
sg, scsi_sg_count(current_command), i) {
tot_trans += sym53c416_write(base,
SG_ADDRESS(sg),
sg->length);
}
if(tot_trans < current_command->underflow)
printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
}
break;
}
case PHASE_DATA_IN:
{
if(int_reg & BS)
{
current_command->SCp.phase = data_in;
outb(FLUSH_FIFO, base + COMMAND_REG);
sym53c416_set_transfer_counter(base,
scsi_bufflen(current_command));
outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
scsi_for_each_sg(current_command,
sg, scsi_sg_count(current_command), i) {
tot_trans += sym53c416_read(base,
SG_ADDRESS(sg),
sg->length);
}
if(tot_trans < current_command->underflow)
printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
}
break;
}
case PHASE_COMMAND:
{
current_command->SCp.phase = command_ph;
printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
break;
}
case PHASE_STATUS:
{
current_command->SCp.phase = status_ph;
outb(FLUSH_FIFO, base + COMMAND_REG);
outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
break;
}
case PHASE_RESERVED_1:
case PHASE_RESERVED_2:
{
printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
break;
}
case PHASE_MESSAGE_OUT:
{
current_command->SCp.phase = message_out;
outb(SET_ATN, base + COMMAND_REG);
outb(MSG_ACCEPTED, base + COMMAND_REG);
break;
}
case PHASE_MESSAGE_IN:
{
current_command->SCp.phase = message_in;
current_command->SCp.Status = inb(base + SCSI_FIFO);
current_command->SCp.Message = inb(base + SCSI_FIFO);
if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
outb(SET_ATN, base + COMMAND_REG);
outb(MSG_ACCEPTED, base + COMMAND_REG);
break;
}
}
out:
return IRQ_HANDLED;
}
static void sym53c416_init(int base, int scsi_id)
{
outb(RESET_CHIP, base + COMMAND_REG);
outb(NOOP, base + COMMAND_REG);
outb(0x99, base + TOM); /* Time out of 250 ms */
outb(0x05, base + STP);
outb(0x00, base + SYNC_OFFSET);
outb(EPC | scsi_id, base + CONF_REG_1);
outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
outb(0x83 | EAN, base + CONF_REG_4);
outb(IE | WSE0, base + CONF_REG_5);
outb(0, base + FEATURE_EN);
}
static int sym53c416_probeirq(int base, int scsi_id)
{
int irq, irqs;
unsigned long i;
/* Clear interrupt register */
inb(base + INT_REG);
/* Start probing for irq's */
irqs = probe_irq_on();
/* Reinit chip */
sym53c416_init(base, scsi_id);
/* Cause interrupt */
outb(NOOP, base + COMMAND_REG);
outb(ILLEGAL, base + COMMAND_REG);
outb(0x07, base + DEST_BUS_ID);
outb(0x00, base + DEST_BUS_ID);
/* Wait for interrupt to occur */
i = jiffies + 20;
while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
barrier();
if(time_before_eq(i, jiffies)) /* timed out */
return 0;
/* Get occurred irq */
irq = probe_irq_off(irqs);
sym53c416_init(base, scsi_id);
return irq;
}
/* Setup: sym53c416=base,irq */
void sym53c416_setup(char *str, int *ints)
{
int i;
if(host_index >= MAXHOSTS)
{
printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
return;
}
if(ints[0] < 1 || ints[0] > 2)
{
printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
return;
}
for(i = 0; i < host_index && i >= 0; i++)
if(hosts[i].base == ints[1])
i = -2;
if(i >= 0)
{
hosts[host_index].base = ints[1];
hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
host_index++;
}
}
static int sym53c416_test(int base)
{
outb(RESET_CHIP, base + COMMAND_REG);
outb(NOOP, base + COMMAND_REG);
if(inb(base + COMMAND_REG) != NOOP)
return 0;
if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
return 0;
if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
return 0;
return 1;
}
static struct isapnp_device_id id_table[] __devinitdata = {
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID,
ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID,
ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
{ ISAPNP_DEVICE_SINGLE_END }
};
MODULE_DEVICE_TABLE(isapnp, id_table);
static void sym53c416_probe(void)
{
int *base = probeaddrs;
int ints[2];
ints[0] = 1;
for(; *base; base++) {
if (request_region(*base, IO_RANGE, ID)) {
if (sym53c416_test(*base)) {
ints[1] = *base;
sym53c416_setup(NULL, ints);
}
release_region(*base, IO_RANGE);
}
}
}
int __init sym53c416_detect(struct scsi_host_template *tpnt)
{
unsigned long flags;
struct Scsi_Host * shpnt = NULL;
int i;
int count;
struct pnp_dev *idev = NULL;
#ifdef MODULE
int ints[3];
ints[0] = 2;
if(sym53c416_base[0])
{
ints[1] = sym53c416_base[0];
ints[2] = sym53c416_base[1];
sym53c416_setup(NULL, ints);
}
if(sym53c416_base_1[0])
{
ints[1] = sym53c416_base_1[0];
ints[2] = sym53c416_base_1[1];
sym53c416_setup(NULL, ints);
}
if(sym53c416_base_2[0])
{
ints[1] = sym53c416_base_2[0];
ints[2] = sym53c416_base_2[1];
sym53c416_setup(NULL, ints);
}
if(sym53c416_base_3[0])
{
ints[1] = sym53c416_base_3[0];
ints[2] = sym53c416_base_3[1];
sym53c416_setup(NULL, ints);
}
#endif
printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
for (i=0; id_table[i].vendor != 0; i++) {
while((idev=pnp_find_dev(NULL, id_table[i].vendor,
id_table[i].function, idev))!=NULL)
{
int i[3];
if(pnp_device_attach(idev)<0)
{
printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
continue;
}
if(pnp_activate_dev(idev) < 0)
{
printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
pnp_device_detach(idev);
continue;
}
i[0] = 2;
i[1] = pnp_port_start(idev, 0);
i[2] = pnp_irq(idev, 0);
printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
i[1], i[2]);
sym53c416_setup(NULL, i);
}
}
sym53c416_probe();
/* Now we register and set up each host adapter found... */
for(count = 0, i = 0; i < host_index; i++) {
if (!request_region(hosts[i].base, IO_RANGE, ID))
continue;
if (!sym53c416_test(hosts[i].base)) {
printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
goto fail_release_region;
}
/* We don't have an irq yet, so we should probe for one */
if (!hosts[i].irq)
hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
if (!hosts[i].irq)
goto fail_release_region;
shpnt = scsi_register(tpnt, 0);
if (!shpnt)
goto fail_release_region;
/* Request for specified IRQ */
if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
goto fail_free_host;
spin_lock_irqsave(&sym53c416_lock, flags);
shpnt->unique_id = hosts[i].base;
shpnt->io_port = hosts[i].base;
shpnt->n_io_port = IO_RANGE;
shpnt->irq = hosts[i].irq;
shpnt->this_id = hosts[i].scsi_id;
sym53c416_init(hosts[i].base, hosts[i].scsi_id);
count++;
spin_unlock_irqrestore(&sym53c416_lock, flags);
continue;
fail_free_host:
scsi_unregister(shpnt);
fail_release_region:
release_region(hosts[i].base, IO_RANGE);
}
return count;
}
const char *sym53c416_info(struct Scsi_Host *SChost)
{
int i;
int base = SChost->io_port;
int irq = SChost->irq;
int scsi_id = 0;
int rev = inb(base + TC_HIGH);
for(i = 0; i < host_index; i++)
if(hosts[i].base == base)
scsi_id = hosts[i].scsi_id;
sprintf(info, "Symbios Logic 53c416 (rev. %d) at 0x%03x, irq %d, SCSI-ID %d, %s pio", rev, base, irq, scsi_id, (fastpio)? "fast" : "slow");
return info;
}
int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
{
int base;
unsigned long flags = 0;
int i;
/* Store base register as we can have more than one controller in the system */
base = SCpnt->device->host->io_port;
current_command = SCpnt; /* set current command */
current_command->scsi_done = done; /* set ptr to done function */
current_command->SCp.phase = command_ph; /* currect phase is the command phase */
current_command->SCp.Status = 0;
current_command->SCp.Message = 0;
spin_lock_irqsave(&sym53c416_lock, flags);
outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target */
outb(FLUSH_FIFO, base + COMMAND_REG); /* Flush SCSI and PIO FIFO's */
/* Write SCSI command into the SCSI fifo */
for(i = 0; i < SCpnt->cmd_len; i++)
outb(SCpnt->cmnd[i], base + SCSI_FIFO);
/* Start selection sequence */
outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
/* Now an interrupt will be generated which we will catch in out interrupt routine */
spin_unlock_irqrestore(&sym53c416_lock, flags);
return 0;
}
static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
{
int base;
int scsi_id = -1;
int i;
unsigned long flags;
spin_lock_irqsave(&sym53c416_lock, flags);
/* printk("sym53c416_reset\n"); */
base = SCpnt->device->host->io_port;
/* search scsi_id - fixme, we shouldnt need to iterate for this! */
for(i = 0; i < host_index && scsi_id == -1; i++)
if(hosts[i].base == base)
scsi_id = hosts[i].scsi_id;
outb(RESET_CHIP, base + COMMAND_REG);
outb(NOOP | PIO_MODE, base + COMMAND_REG);
outb(RESET_SCSI_BUS, base + COMMAND_REG);
sym53c416_init(base, scsi_id);
spin_unlock_irqrestore(&sym53c416_lock, flags);
return SUCCESS;
}
static int sym53c416_release(struct Scsi_Host *shost)
{
if (shost->irq)
free_irq(shost->irq, shost);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
return 0;
}
static int sym53c416_bios_param(struct scsi_device *sdev,
struct block_device *dev,
sector_t capacity, int *ip)
{
int size;
size = capacity;
ip[0] = 64; /* heads */
ip[1] = 32; /* sectors */
if((ip[2] = size >> 11) > 1024) /* cylinders, test for big disk */
{
ip[0] = 255; /* heads */
ip[1] = 63; /* sectors */
ip[2] = size / (255 * 63); /* cylinders */
}
return 0;
}
/* Loadable module support */
#ifdef MODULE
MODULE_AUTHOR("Lieven Willems");
MODULE_LICENSE("GPL");
module_param_array(sym53c416, uint, NULL, 0);
module_param_array(sym53c416_1, uint, NULL, 0);
module_param_array(sym53c416_2, uint, NULL, 0);
module_param_array(sym53c416_3, uint, NULL, 0);
#endif
static struct scsi_host_template driver_template = {
.proc_name = "sym53c416",
.name = "Symbios Logic 53c416",
.detect = sym53c416_detect,
.info = sym53c416_info,
.queuecommand = sym53c416_queuecommand,
.eh_host_reset_handler =sym53c416_host_reset,
.release = sym53c416_release,
.bios_param = sym53c416_bios_param,
.can_queue = 1,
.this_id = SYM53C416_SCSI_ID,
.sg_tablesize = 32,
.cmd_per_lun = 1,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
};
#include "scsi_module.c"
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