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