drivers/scsi/mvme16x_scsi.c

   1 /*
   2  * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
   3  *
   4  * Based on work by Alan Hourihane
   5  *
   6  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
   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/mvme16xhw.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("Kars de Jong <jongk@linux-m68k.org>");
  25 MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
  26 MODULE_LICENSE("GPL");
  27
  28 static struct scsi_host_template mvme16x_scsi_driver_template = {
  29         .name                   = "MVME16x NCR53c710 SCSI",
  30         .proc_name              = "MVME16x",
  31         .this_id                = 7,
  32         .module                 = THIS_MODULE,
  33 };
  34
  35 static struct platform_device *mvme16x_scsi_device;
  36
  37 static int mvme16x_probe(struct platform_device *dev)
  38 {
  39         struct Scsi_Host * host = NULL;
  40         struct NCR_700_Host_Parameters *hostdata;
  41
  42         if (!MACH_IS_MVME16x)
  43                 goto out;
  44
  45         if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
  46                 printk(KERN_INFO "mvme16x-scsi: detection disabled, "
  47                                  "SCSI chip not present\n");
  48                 goto out;
  49         }
  50
  51         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  52         if (hostdata == NULL) {
  53                 printk(KERN_ERR "mvme16x-scsi: "
  54                                 "Failed to allocate host data\n");
  55                 goto out;
  56         }
  57
  58         /* Fill in the required pieces of hostdata */
  59         hostdata->base = (void __iomem *)0xfff47000UL;
  60         hostdata->clock = 50;   /* XXX - depends on the CPU clock! */
  61         hostdata->chip710 = 1;
  62         hostdata->dmode_extra = DMODE_FC2;
  63         hostdata->dcntl_extra = EA_710;
  64         hostdata->ctest7_extra = CTEST7_TT1;
  65
  66         /* and register the chip */
  67         host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata,
  68                               &dev->dev);
  69         if (!host) {
  70                 printk(KERN_ERR "mvme16x-scsi: No host detected; "
  71                                 "board configuration problem?\n");
  72                 goto out_free;
  73         }
  74         host->this_id = 7;
  75         host->base = 0xfff47000UL;
  76         host->irq = MVME16x_IRQ_SCSI;
  77         if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
  78                 printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
  79                 goto out_put_host;
  80         }
  81
  82         /* Enable scsi chip ints */
  83         {
  84                 volatile unsigned long v;
  85
  86                 /* Enable scsi interrupts at level 4 in PCCchip2 */
  87                 v = in_be32(0xfff4202c);
  88                 v = (v & ~0xff) | 0x10 | 4;
  89                 out_be32(0xfff4202c, v);
  90         }
  91
  92         platform_set_drvdata(dev, host);
  93         scsi_scan_host(host);
  94
  95         return 0;
  96
  97  out_put_host:
  98         scsi_host_put(host);
  99  out_free:
 100         kfree(hostdata);
 101  out:
 102         return -ENODEV;
 103 }
 104
 105 static int mvme16x_device_remove(struct platform_device *dev)
 106 {
 107         struct Scsi_Host *host = platform_get_drvdata(dev);
 108         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
 109
 110         /* Disable scsi chip ints */
 111         {
 112                 volatile unsigned long v;
 113
 114                 v = in_be32(0xfff4202c);
 115                 v &= ~0x10;
 116                 out_be32(0xfff4202c, v);
 117         }
 118         scsi_remove_host(host);
 119         NCR_700_release(host);
 120         kfree(hostdata);
 121         free_irq(host->irq, host);
 122
 123         return 0;
 124 }
 125
 126 static struct platform_driver mvme16x_scsi_driver = {
 127         .driver = {
 128                 .name           = "mvme16x-scsi",
 129                 .owner          = THIS_MODULE,
 130         },
 131         .probe          = mvme16x_probe,
 132         .remove         = mvme16x_device_remove,
 133 };
 134
 135 static int __init mvme16x_scsi_init(void)
 136 {
 137         int err;
 138
 139         err = platform_driver_register(&mvme16x_scsi_driver);
 140         if (err)
 141                 return err;
 142
 143         mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
 144                                                               -1, NULL, 0);
 145         if (IS_ERR(mvme16x_scsi_device)) {
 146                 platform_driver_unregister(&mvme16x_scsi_driver);
 147                 return PTR_ERR(mvme16x_scsi_device);
 148         }
 149
 150         return 0;
 151 }
 152
 153 static void __exit mvme16x_scsi_exit(void)
 154 {
 155         platform_device_unregister(mvme16x_scsi_device);
 156         platform_driver_unregister(&mvme16x_scsi_driver);
 157 }
 158
 159 module_init(mvme16x_scsi_init);
 160 module_exit(mvme16x_scsi_exit);