drivers/scsi/a4000t.c

   1 /*
   2  * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
   3  *              Amiga Technologies A4000T SCSI controller.
   4  *
   5  * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
   6  * plus modifications of the 53c7xx.c driver to support the Amiga.
   7  *
   8  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <asm/amigahw.h>
  16 #include <asm/amigaints.h>
  17 #include <scsi/scsi_host.h>
  18 #include <scsi/scsi_transport_spi.h>
  19
  20 #include "53c700.h"
  21
  22 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
  23 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
  24 MODULE_LICENSE("GPL");
  25
  26
  27 static struct scsi_host_template a4000t_scsi_driver_template = {
  28         .name           = "A4000T builtin SCSI",
  29         .proc_name      = "A4000t",
  30         .this_id        = 7,
  31         .module         = THIS_MODULE,
  32 };
  33
  34 static struct platform_device *a4000t_scsi_device;
  35
  36 #define A4000T_SCSI_ADDR 0xdd0040
  37
  38 static int __devinit a4000t_probe(struct platform_device *dev)
  39 {
  40         struct Scsi_Host *host;
  41         struct NCR_700_Host_Parameters *hostdata;
  42
  43         if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI)))
  44                 goto out;
  45
  46         if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000,
  47                                 "A4000T builtin SCSI"))
  48                 goto out;
  49
  50         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  51         if (!hostdata) {
  52                 printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n");
  53                 goto out_release;
  54         }
  55
  56         /* Fill in the required pieces of hostdata */
  57         hostdata->base = (void __iomem *)ZTWO_VADDR(A4000T_SCSI_ADDR);
  58         hostdata->clock = 50;
  59         hostdata->chip710 = 1;
  60         hostdata->dmode_extra = DMODE_FC2;
  61         hostdata->dcntl_extra = EA_710;
  62
  63         /* and register the chip */
  64         host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
  65                               &dev->dev);
  66         if (!host) {
  67                 printk(KERN_ERR "a4000t-scsi: No host detected; "
  68                                 "board configuration problem?\n");
  69                 goto out_free;
  70         }
  71
  72         host->this_id = 7;
  73         host->base = A4000T_SCSI_ADDR;
  74         host->irq = IRQ_AMIGA_PORTS;
  75
  76         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
  77                         host)) {
  78                 printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
  79                 goto out_put_host;
  80         }
  81
  82         platform_set_drvdata(dev, host);
  83         scsi_scan_host(host);
  84
  85         return 0;
  86
  87  out_put_host:
  88         scsi_host_put(host);
  89  out_free:
  90         kfree(hostdata);
  91  out_release:
  92         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
  93  out:
  94         return -ENODEV;
  95 }
  96
  97 static __devexit int a4000t_device_remove(struct platform_device *dev)
  98 {
  99         struct Scsi_Host *host = platform_get_drvdata(dev);
 100         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
 101
 102         scsi_remove_host(host);
 103
 104         NCR_700_release(host);
 105         kfree(hostdata);
 106         free_irq(host->irq, host);
 107         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
 108
 109         return 0;
 110 }
 111
 112 static struct platform_driver a4000t_scsi_driver = {
 113         .driver = {
 114                 .name           = "a4000t-scsi",
 115                 .owner          = THIS_MODULE,
 116         },
 117         .probe          = a4000t_probe,
 118         .remove         = __devexit_p(a4000t_device_remove),
 119 };
 120
 121 static int __init a4000t_scsi_init(void)
 122 {
 123         int err;
 124
 125         err = platform_driver_register(&a4000t_scsi_driver);
 126         if (err)
 127                 return err;
 128
 129         a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
 130                         -1, NULL, 0);
 131         if (IS_ERR(a4000t_scsi_device)) {
 132                 platform_driver_unregister(&a4000t_scsi_driver);
 133                 return PTR_ERR(a4000t_scsi_device);
 134         }
 135
 136         return err;
 137 }
 138
 139 static void __exit a4000t_scsi_exit(void)
 140 {
 141         platform_device_unregister(a4000t_scsi_device);
 142         platform_driver_unregister(&a4000t_scsi_driver);
 143 }
 144
 145 module_init(a4000t_scsi_init);
 146 module_exit(a4000t_scsi_exit);