/*
* Qlogic FAS408 ISA card driver
*
* Copyright 1994, Tom Zerucha.
* tz@execpc.com
*
* Redistributable under terms of the GNU General Public License
*
* For the avoidance of doubt the "preferred form" of this code is one which
* is in an open non patent encumbered format. Where cryptographic key signing
* forms part of the process of creating an executable the information
* including keys needed to generate an equivalently functional executable
* are deemed to be part of the source code.
*
* Check qlogicfas408.c for more credits and info.
*/
#include <linux/module.h>
#include <linux/blkdev.h> /* to get disk capacity */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/unistd.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/dma.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "qlogicfas408.h"
/* Set the following to 2 to use normal interrupt (active high/totempole-
* tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
* drain
*/
#define INT_TYPE 2
static char qlogicfas_name[] = "qlogicfas";
/*
* Look for qlogic card and init if found
*/
static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host,
int qbase,
int qlirq)
{
int qltyp; /* type of chip */
int qinitid;
struct Scsi_Host *hreg; /* registered host structure */
struct qlogicfas408_priv *priv;
/* Qlogic Cards only exist at 0x230 or 0x330 (the chip itself
* decodes the address - I check 230 first since MIDI cards are
* typically at 0x330
*
* Theoretically, two Qlogic cards can coexist in the same system.
* This should work by simply using this as a loadable module for
* the second card, but I haven't tested this.
*/
if (!qbase || qlirq == -1)
goto err;
if (!request_region(qbase, 0x10, qlogicfas_name)) {
printk(KERN_INFO "%s: address %#x is busy\n", qlogicfas_name,
qbase);
goto err;
}
if (!qlogicfas408_detect(qbase, INT_TYPE)) {
printk(KERN_WARNING "%s: probe failed for %#x\n",
qlogicfas_name,
qbase);
goto err_release_mem;
}
printk(KERN_INFO "%s: Using preset base address of %03x,"
" IRQ %d\n", qlogicfas_name, qbase, qlirq);
qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
qinitid = host->this_id;
if (qinitid < 0)
qinitid = 7; /* if no ID, use 7 */
qlogicfas408_setup(qbase, qinitid, INT_TYPE);
hreg = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
if (!hreg)
goto err_release_mem;
priv = get_priv_by_host(hreg);
hreg->io_port = qbase;
hreg->n_io_port = 16;
hreg->dma_channel = -1;
if (qlirq != -1)
hreg->irq = qlirq;
priv->qbase = qbase;
priv->qlirq = qlirq;
priv->qinitid = qinitid;
priv->shost = hreg;
priv->int_type = INT_TYPE;
sprintf(priv->qinfo,
"Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
qltyp, qbase, qlirq, QL_TURBO_PDMA);
host->name = qlogicfas_name;
if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogicfas_name, hreg))
goto free_scsi_host;
if (scsi_add_host(hreg, NULL))
goto free_interrupt;
scsi_scan_host(hreg);
return hreg;
free_interrupt:
free_irq(qlirq, hreg);
free_scsi_host:
scsi_host_put(hreg);
err_release_mem:
release_region(qbase, 0x10);
err:
return NULL;
}
#define MAX_QLOGICFAS 8
static struct qlogicfas408_priv *cards;
static int iobase[MAX_QLOGICFAS];
static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 };
module_param_array(iobase, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(iobase, "I/O address");
MODULE_PARM_DESC(irq, "IRQ");
static int __devinit qlogicfas_detect(struct scsi_host_template *sht)
{
struct Scsi_Host *shost;
struct qlogicfas408_priv *priv;
int num;
for (num = 0; num < MAX_QLOGICFAS; num++) {
shost = __qlogicfas_detect(sht, iobase[num], irq[num]);
if (shost == NULL) {
/* no more devices */
break;
}
priv = get_priv_by_host(shost);
priv->next = cards;
cards = priv;
}
return num;
}
static int qlogicfas_release(struct Scsi_Host *shost)
{
struct qlogicfas408_priv *priv = get_priv_by_host(shost);
scsi_remove_host(shost);
if (shost->irq) {
qlogicfas408_disable_ints(priv);
free_irq(shost->irq, shost);
}
if (shost->dma_channel != 0xff)
free_dma(shost->dma_channel);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_host_put(shost);
return 0;
}
/*
* The driver template is also needed for PCMCIA
*/
static struct scsi_host_template qlogicfas_driver_template = {
.module = THIS_MODULE,
.name = qlogicfas_name,
.proc_name = qlogicfas_name,
.info = qlogicfas408_info,
.queuecommand = qlogicfas408_queuecommand,
.eh_abort_handler = qlogicfas408_abort,
.eh_bus_reset_handler = qlogicfas408_bus_reset,
.bios_param = qlogicfas408_biosparam,
.can_queue = 1,
.this_id = -1,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static __init int qlogicfas_init(void)
{
if (!qlogicfas_detect(&qlogicfas_driver_template)) {
/* no cards found */
printk(KERN_INFO "%s: no cards were found, please specify "
"I/O address and IRQ using iobase= and irq= "
"options", qlogicfas_name);
return -ENODEV;
}
return 0;
}
static __exit void qlogicfas_exit(void)
{
struct qlogicfas408_priv *priv;
for (priv = cards; priv != NULL; priv = priv->next)
qlogicfas_release(priv->shost);
}
MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
MODULE_DESCRIPTION("Driver for the Qlogic FAS408 based ISA card");
MODULE_LICENSE("GPL");
module_init(qlogicfas_init);
module_exit(qlogicfas_exit);
