LXR linux/drivers/scsi/bvme6000

   1/*
   2 * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
   3 *
   4 * Based on work by Alan Hourihane and Kars de Jong
   5 *
   6 * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/blkdev.h>
  11#include <linux/device.h>
  12#include <linux/platform_device.h>
  13#include <linux/init.h>
  14#include <linux/interrupt.h>
  15#include <linux/slab.h>
  16#include <asm/bvme6000hw.h>
  17#include <scsi/scsi_host.h>
  18#include <scsi/scsi_device.h>
  19#include <scsi/scsi_transport.h>
  20#include <scsi/scsi_transport_spi.h>
  21
  22#include "53c700.h"
  23
  24MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
  25MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
  26MODULE_LICENSE("GPL");
  27
  28static struct scsi_host_template bvme6000_scsi_driver_template = {
  29        .name                   = "BVME6000 NCR53c710 SCSI",
  30        .proc_name              = "BVME6000",
  31        .this_id                = 7,
  32        .module                 = THIS_MODULE,
  33};
  34
  35static struct platform_device *bvme6000_scsi_device;
  36
  37static int
  38bvme6000_probe(struct platform_device *dev)
  39{
  40        struct Scsi_Host *host;
  41        struct NCR_700_Host_Parameters *hostdata;
  42
  43        if (!MACH_IS_BVME6000)
  44                goto out;
  45
  46        hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  47        if (!hostdata) {
  48                printk(KERN_ERR "bvme6000-scsi: "
  49                                "Failed to allocate host data\n");
  50                goto out;
  51        }
  52
  53        /* Fill in the required pieces of hostdata */
  54        hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
  55        hostdata->clock = 40;   /* XXX - depends on the CPU clock! */
  56        hostdata->chip710 = 1;
  57        hostdata->dmode_extra = DMODE_FC2;
  58        hostdata->dcntl_extra = EA_710;
  59        hostdata->ctest7_extra = CTEST7_TT1;
  60
  61        /* and register the chip */
  62        host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
  63                              &dev->dev);
  64        if (!host) {
  65                printk(KERN_ERR "bvme6000-scsi: No host detected; "
  66                                "board configuration problem?\n");
  67                goto out_free;
  68        }
  69        host->base = BVME_NCR53C710_BASE;
  70        host->this_id = 7;
  71        host->irq = BVME_IRQ_SCSI;
  72        if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
  73                        host)) {
  74                printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
  75                goto out_put_host;
  76        }
  77
  78        platform_set_drvdata(dev, host);
  79        scsi_scan_host(host);
  80
  81        return 0;
  82
  83 out_put_host:
  84        scsi_host_put(host);
  85 out_free:
  86        kfree(hostdata);
  87 out:
  88        return -ENODEV;
  89}
  90
  91static int
  92bvme6000_device_remove(struct platform_device *dev)
  93{
  94        struct Scsi_Host *host = platform_get_drvdata(dev);
  95        struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
  96
  97        scsi_remove_host(host);
  98        NCR_700_release(host);
  99        kfree(hostdata);
 100        free_irq(host->irq, host);
 101
 102        return 0;
 103}
 104
 105static struct platform_driver bvme6000_scsi_driver = {
 106        .driver = {
 107                .name           = "bvme6000-scsi",
 108        },
 109        .probe          = bvme6000_probe,
 110        .remove         = bvme6000_device_remove,
 111};
 112
 113static int __init bvme6000_scsi_init(void)
 114{
 115        int err;
 116
 117        err = platform_driver_register(&bvme6000_scsi_driver);
 118        if (err)
 119                return err;
 120
 121        bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
 122                                                               -1, NULL, 0);
 123        if (IS_ERR(bvme6000_scsi_device)) {
 124                platform_driver_unregister(&bvme6000_scsi_driver);
 125                return PTR_ERR(bvme6000_scsi_device);
 126        }
 127
 128        return 0;
 129}
 130
 131static void __exit bvme6000_scsi_exit(void)
 132{
 133        platform_device_unregister(bvme6000_scsi_device);
 134        platform_driver_unregister(&bvme6000_scsi_driver);
 135}
 136
 137module_init(bvme6000_scsi_init);
 138module_exit(bvme6000_scsi_exit);
 139