drivers/scsi/bvme6000_scsi.c

   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
  24 MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
  25 MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
  26 MODULE_LICENSE("GPL");
  27
  28 static 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
  35 static struct platform_device *bvme6000_scsi_device;
  36
  37 static int
  38 bvme6000_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
  91 static int
  92 bvme6000_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
 105 static struct platform_driver bvme6000_scsi_driver = {
 106         .driver = {
 107                 .name           = "bvme6000-scsi",
 108                 .owner          = THIS_MODULE,
 109         },
 110         .probe          = bvme6000_probe,
 111         .remove         = bvme6000_device_remove,
 112 };
 113
 114 static int __init bvme6000_scsi_init(void)
 115 {
 116         int err;
 117
 118         err = platform_driver_register(&bvme6000_scsi_driver);
 119         if (err)
 120                 return err;
 121
 122         bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
 123                                                                -1, NULL, 0);
 124         if (IS_ERR(bvme6000_scsi_device)) {
 125                 platform_driver_unregister(&bvme6000_scsi_driver);
 126                 return PTR_ERR(bvme6000_scsi_device);
 127         }
 128
 129         return 0;
 130 }
 131
 132 static void __exit bvme6000_scsi_exit(void)
 133 {
 134         platform_device_unregister(bvme6000_scsi_device);
 135         platform_driver_unregister(&bvme6000_scsi_driver);
 136 }
 137
 138 module_init(bvme6000_scsi_init);
 139 module_exit(bvme6000_scsi_exit);