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167 lines
3.5 KiB
C
167 lines
3.5 KiB
C
#define AUTOSENSE
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/* #define PSEUDO_DMA */
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/*
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* EcoSCSI Generic NCR5380 driver
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*
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* Copyright 1995, Russell King
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*
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* ALPHA RELEASE 1.
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*
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* For more information, please consult
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*
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* NCR 5380 Family
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* SCSI Protocol Controller
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* Databook
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*
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* NCR Microelectronics
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* 1635 Aeroplaza Drive
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* Colorado Springs, CO 80916
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* 1+ (719) 578-3400
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* 1+ (800) 334-5454
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*/
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include "../scsi.h"
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#include <scsi/scsi_host.h>
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#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
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#define NCR5380_local_declare() void __iomem *_base
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#define NCR5380_setup(host) _base = priv(host)->base
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#define NCR5380_read(reg) ({ writeb(reg | 8, _base); readb(_base + 4); })
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#define NCR5380_write(reg, value) ({ writeb(reg | 8, _base); writeb(value, _base + 4); })
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#define NCR5380_intr ecoscsi_intr
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#define NCR5380_queue_command ecoscsi_queue_command
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#define NCR5380_proc_info ecoscsi_proc_info
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#define NCR5380_implementation_fields \
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void __iomem *base
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#include "../NCR5380.h"
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#define ECOSCSI_PUBLIC_RELEASE 1
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/*
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* Function : ecoscsi_setup(char *str, int *ints)
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*
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* Purpose : LILO command line initialization of the overrides array,
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*
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* Inputs : str - unused, ints - array of integer parameters with ints[0]
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* equal to the number of ints.
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*
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*/
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void ecoscsi_setup(char *str, int *ints)
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{
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}
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const char * ecoscsi_info (struct Scsi_Host *spnt)
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{
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return "";
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}
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#define BOARD_NORMAL 0
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#define BOARD_NCR53C400 1
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#include "../NCR5380.c"
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static struct scsi_host_template ecoscsi_template = {
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.module = THIS_MODULE,
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.name = "Serial Port EcoSCSI NCR5380",
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.proc_name = "ecoscsi",
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.info = ecoscsi_info,
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.queuecommand = ecoscsi_queue_command,
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.eh_abort_handler = NCR5380_abort,
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.eh_bus_reset_handler = NCR5380_bus_reset,
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.can_queue = 16,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 2,
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.use_clustering = DISABLE_CLUSTERING
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};
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static struct Scsi_Host *host;
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static int __init ecoscsi_init(void)
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{
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void __iomem *_base;
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int ret;
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if (!request_mem_region(0x33a0000, 4096, "ecoscsi")) {
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ret = -EBUSY;
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goto out;
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}
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_base = ioremap(0x33a0000, 4096);
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if (!_base) {
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ret = -ENOMEM;
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goto out_release;
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}
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NCR5380_write(MODE_REG, 0x20); /* Is it really SCSI? */
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if (NCR5380_read(MODE_REG) != 0x20) /* Write to a reg. */
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goto out_unmap;
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NCR5380_write(MODE_REG, 0x00); /* it back. */
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if (NCR5380_read(MODE_REG) != 0x00)
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goto out_unmap;
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host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
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if (!host) {
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ret = -ENOMEM;
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goto out_unmap;
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}
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priv(host)->base = _base;
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host->irq = IRQ_NONE;
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NCR5380_init(host, 0);
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printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port);
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printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
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host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE);
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printk("\nscsi%d:", host->host_no);
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NCR5380_print_options(host);
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printk("\n");
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scsi_add_host(host, NULL); /* XXX handle failure */
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scsi_scan_host(host);
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return 0;
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out_unmap:
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iounmap(_base);
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out_release:
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release_mem_region(0x33a0000, 4096);
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out:
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return ret;
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}
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static void __exit ecoscsi_exit(void)
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{
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scsi_remove_host(host);
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NCR5380_exit(host);
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scsi_host_put(host);
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release_mem_region(0x33a0000, 4096);
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return 0;
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}
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module_init(ecoscsi_init);
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module_exit(ecoscsi_exit);
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MODULE_AUTHOR("Russell King");
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MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
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MODULE_LICENSE("GPL");
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