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![Jeff Garzik](/assets/img/avatar_default.png)
Drivers need not implement a hook that returns FAILED, and does nothing else, since the SCSI midlayer code will do that for us. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
237 lines
5.1 KiB
C
237 lines
5.1 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/sched.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 NCR5380_implementation_fields int port, ctrl
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#define NCR5380_local_declare() struct Scsi_Host *_instance
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#define NCR5380_setup(instance) _instance = instance
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#define NCR5380_read(reg) ecoscsi_read(_instance, reg)
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#define NCR5380_write(reg, value) ecoscsi_write(_instance, reg, value)
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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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#include "../NCR5380.h"
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#define ECOSCSI_PUBLIC_RELEASE 1
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static char ecoscsi_read(struct Scsi_Host *instance, int reg)
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{
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int iobase = instance->io_port;
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outb(reg | 8, iobase);
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return inb(iobase + 1);
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}
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static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value)
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{
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int iobase = instance->io_port;
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outb(reg | 8, iobase);
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outb(value, iobase + 1);
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}
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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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#if 0
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#define STAT(p) inw(p + 144)
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static inline int NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr,
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int len)
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{
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int iobase = host->io_port;
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printk("writing %p len %d\n",addr, len);
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if(!len) return -1;
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while(1)
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{
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int status;
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while(((status = STAT(iobase)) & 0x100)==0);
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}
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}
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static inline int NCR5380_pread(struct Scsi_Host *host, unsigned char *addr,
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int len)
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{
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int iobase = host->io_port;
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int iobase2= host->io_port + 0x100;
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unsigned char *start = addr;
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int s;
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printk("reading %p len %d\n",addr, len);
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outb(inb(iobase + 128), iobase + 135);
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while(len > 0)
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{
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int status,b,i, timeout;
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timeout = 0x07FFFFFF;
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while(((status = STAT(iobase)) & 0x100)==0)
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{
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timeout--;
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if(status & 0x200 || !timeout)
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{
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printk("status = %p\n",status);
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outb(0, iobase + 135);
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return 1;
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}
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}
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if(len >= 128)
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{
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for(i=0; i<64; i++)
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{
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b = inw(iobase + 136);
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*addr++ = b;
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*addr++ = b>>8;
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}
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len -= 128;
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}
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else
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{
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b = inw(iobase + 136);
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*addr ++ = b;
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len -= 1;
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if(len)
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*addr ++ = b>>8;
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len -= 1;
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}
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}
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outb(0, iobase + 135);
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printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]);
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return 1;
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}
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#endif
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#undef STAT
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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 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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host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
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if (!host)
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return 0;
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host->io_port = 0x80ce8000;
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host->n_io_port = 144;
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host->irq = IRQ_NONE;
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if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) )
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goto unregister_scsi;
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ecoscsi_write(host, MODE_REG, 0x20); /* Is it really SCSI? */
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if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg. */
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goto release_reg;
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ecoscsi_write(host, MODE_REG, 0x00 ); /* it back. */
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if (ecoscsi_read(host, MODE_REG) != 0x00)
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goto release_reg;
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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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release_reg:
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release_region(host->io_port, host->n_io_port);
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unregister_scsi:
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scsi_host_put(host);
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return -ENODEV;
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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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if (shpnt->irq != IRQ_NONE)
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free_irq(shpnt->irq, NULL);
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NCR5380_exit(host);
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if (shpnt->io_port)
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release_region(shpnt->io_port, shpnt->n_io_port);
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scsi_host_put(host);
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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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