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 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, dev);
  65         if (!host) {
  66                 printk(KERN_ERR "a4000t-scsi: No host detected; "
  67                                 "board configuration problem?\n");
  68                 goto out_free;
  69         }
  70
  71         host->this_id = 7;
  72         host->base = A4000T_SCSI_ADDR;
  73         host->irq = IRQ_AMIGA_PORTS;
  74
  75         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
  76                         host)) {
  77                 printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
  78                 goto out_put_host;
  79         }
  80
  81         dev_set_drvdata(dev, host);
  82         scsi_scan_host(host);
  83
  84         return 0;
  85
  86  out_put_host:
  87         scsi_host_put(host);
  88  out_free:
  89         kfree(hostdata);
  90  out_release:
  91         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
  92  out:
  93         return -ENODEV;
  94 }
  95
  96 static __devexit int a4000t_device_remove(struct device *dev)
  97 {
  98         struct Scsi_Host *host = dev_get_drvdata(dev);
  99         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
 100
 101         scsi_remove_host(host);
 102
 103         NCR_700_release(host);
 104         kfree(hostdata);
 105         free_irq(host->irq, host);
 106         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
 107
 108         return 0;
 109 }
 110
 111 static struct device_driver a4000t_scsi_driver = {
 112         .name   = "a4000t-scsi",
 113         .bus    = &platform_bus_type,
 114         .probe  = a4000t_probe,
 115         .remove = __devexit_p(a4000t_device_remove),
 116 };
 117
 118 static int __init a4000t_scsi_init(void)
 119 {
 120         int err;
 121
 122         err = driver_register(&a4000t_scsi_driver);
 123         if (err)
 124                 return err;
 125
 126         a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
 127                         -1, NULL, 0);
 128         if (IS_ERR(a4000t_scsi_device)) {
 129                 driver_unregister(&a4000t_scsi_driver);
 130                 return PTR_ERR(a4000t_scsi_device);
 131         }
 132
 133         return err;
 134 }
 135
 136 static void __exit a4000t_scsi_exit(void)
 137 {
 138         platform_device_unregister(a4000t_scsi_device);
 139         driver_unregister(&a4000t_scsi_driver);
 140 }
 141
 142 module_init(a4000t_scsi_init);
 143 module_exit(a4000t_scsi_exit);