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