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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>
215 lines
4.6 KiB
C
215 lines
4.6 KiB
C
/*
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* Oak Generic NCR5380 driver
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*
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* Copyright 1995-2002, Russell King
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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/blkdev.h>
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#include <linux/init.h>
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#include <asm/ecard.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 AUTOSENSE
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/*#define PSEUDO_DMA*/
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#define OAKSCSI_PUBLIC_RELEASE 1
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#define NCR5380_read(reg) oakscsi_read(_instance, reg)
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#define NCR5380_write(reg, value) oakscsi_write(_instance, reg, value)
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#define NCR5380_intr oakscsi_intr
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#define NCR5380_queue_command oakscsi_queue_command
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#define NCR5380_proc_info oakscsi_proc_info
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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 BOARD_NORMAL 0
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#define BOARD_NCR53C400 1
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#include "../NCR5380.h"
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#undef START_DMA_INITIATOR_RECEIVE_REG
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#define START_DMA_INITIATOR_RECEIVE_REG (7 + 128)
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const char * oakscsi_info (struct Scsi_Host *spnt)
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{
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return "";
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}
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#define STAT(p) inw(p + 144)
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extern void inswb(int from, void *to, int len);
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static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr,
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int len)
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{
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int iobase = instance->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 *instance, unsigned char *addr,
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int len)
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{
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int iobase = instance->io_port;
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printk("reading %p len %d\n", addr, len);
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while(len > 0)
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{
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int status, timeout;
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unsigned long b;
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timeout = 0x01FFFFFF;
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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 = %08X\n",status);
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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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inswb(iobase + 136, addr, 128);
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addr += 128;
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len -= 128;
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}
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else
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{
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b = (unsigned long) 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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return 0;
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}
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#define oakscsi_read(instance,reg) (inb((instance)->io_port + (reg)))
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#define oakscsi_write(instance,reg,val) (outb((val), (instance)->io_port + (reg)))
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#undef STAT
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#include "../NCR5380.c"
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static Scsi_Host_Template oakscsi_template = {
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.module = THIS_MODULE,
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.proc_info = oakscsi_proc_info,
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.name = "Oak 16-bit SCSI",
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.info = oakscsi_info,
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.queuecommand = oakscsi_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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.proc_name = "oakscsi",
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};
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static int __devinit
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oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
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{
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struct Scsi_Host *host;
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int ret = -ENOMEM;
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host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
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if (!host)
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goto out;
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host->io_port = ecard_address(ec, ECARD_MEMC, 0);
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host->irq = IRQ_NONE;
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host->n_io_port = 255;
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ret = -EBUSY;
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if (!request_region (host->io_port, host->n_io_port, "Oak SCSI"))
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goto unreg;
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NCR5380_init(host, 0);
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printk("scsi%d: at port 0x%08lx irqs disabled",
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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, OAKSCSI_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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ret = scsi_add_host(host, &ec->dev);
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if (ret)
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goto out_release;
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scsi_scan_host(host);
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goto out;
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out_release:
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release_region(host->io_port, host->n_io_port);
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unreg:
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scsi_host_put(host);
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out:
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return ret;
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}
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static void __devexit oakscsi_remove(struct expansion_card *ec)
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{
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struct Scsi_Host *host = ecard_get_drvdata(ec);
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ecard_set_drvdata(ec, NULL);
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scsi_remove_host(host);
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NCR5380_exit(host);
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release_region(host->io_port, host->n_io_port);
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scsi_host_put(host);
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}
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static const struct ecard_id oakscsi_cids[] = {
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{ MANU_OAK, PROD_OAK_SCSI },
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{ 0xffff, 0xffff }
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};
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static struct ecard_driver oakscsi_driver = {
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.probe = oakscsi_probe,
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.remove = __devexit_p(oakscsi_remove),
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.id_table = oakscsi_cids,
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.drv = {
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.name = "oakscsi",
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},
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};
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static int __init oakscsi_init(void)
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{
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return ecard_register_driver(&oakscsi_driver);
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}
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static void __exit oakscsi_exit(void)
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{
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ecard_remove_driver(&oakscsi_driver);
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}
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module_init(oakscsi_init);
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module_exit(oakscsi_exit);
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MODULE_AUTHOR("Russell King");
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MODULE_DESCRIPTION("Oak SCSI driver");
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MODULE_LICENSE("GPL");
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