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
  24 static struct scsi_host_template a4000t_scsi_driver_template = {
  25         .name           = "A4000T builtin SCSI",
  26         .proc_name      = "A4000t",
  27         .this_id        = 7,
  28         .module         = THIS_MODULE,
  29 };
  30
  31
  32 #define A4000T_SCSI_OFFSET      0x40
  33
  34 static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
  35 {
  36         struct resource *res;
  37         phys_addr_t scsi_addr;
  38         struct NCR_700_Host_Parameters *hostdata;
  39         struct Scsi_Host *host;
  40
  41         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  42         if (!res)
  43                 return -ENODEV;
  44
  45         if (!request_mem_region(res->start, resource_size(res),
  46                                 "A4000T builtin SCSI"))
  47                 return -EBUSY;
  48
  49         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
  50                            GFP_KERNEL);
  51         if (!hostdata) {
  52                 dev_err(&pdev->dev, "Failed to allocate host data\n");
  53                 goto out_release;
  54         }
  55
  56         scsi_addr = res->start + A4000T_SCSI_OFFSET;
  57
  58         /* Fill in the required pieces of hostdata */
  59         hostdata->base = (void __iomem *)ZTWO_VADDR(scsi_addr);
  60         hostdata->clock = 50;
  61         hostdata->chip710 = 1;
  62         hostdata->dmode_extra = DMODE_FC2;
  63         hostdata->dcntl_extra = EA_710;
  64
  65         /* and register the chip */
  66         host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
  67                               &pdev->dev);
  68         if (!host) {
  69                 dev_err(&pdev->dev,
  70                         "No host detected; board configuration problem?\n");
  71                 goto out_free;
  72         }
  73
  74         host->this_id = 7;
  75         host->base = scsi_addr;
  76         host->irq = IRQ_AMIGA_PORTS;
  77
  78         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
  79                         host)) {
  80                 dev_err(&pdev->dev, "request_irq failed\n");
  81                 goto out_put_host;
  82         }
  83
  84         platform_set_drvdata(pdev, host);
  85         scsi_scan_host(host);
  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(res->start, resource_size(res));
  94         return -ENODEV;
  95 }
  96
  97 static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
  98 {
  99         struct Scsi_Host *host = platform_get_drvdata(pdev);
 100         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
 101         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 102
 103         scsi_remove_host(host);
 104         NCR_700_release(host);
 105         kfree(hostdata);
 106         free_irq(host->irq, host);
 107         release_mem_region(res->start, resource_size(res));
 108         return 0;
 109 }
 110
 111 static struct platform_driver amiga_a4000t_scsi_driver = {
 112         .remove = __exit_p(amiga_a4000t_scsi_remove),
 113         .driver   = {
 114                 .name   = "amiga-a4000t-scsi",
 115                 .owner  = THIS_MODULE,
 116         },
 117 };
 118
 119 module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
 120
 121 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
 122               "Kars de Jong <jongk@linux-m68k.org>");
 123 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
 124 MODULE_LICENSE("GPL");
 125 MODULE_ALIAS("platform:amiga-a4000t-scsi");