/* * 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); 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_remove_host(shost); 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, }; 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);