drivers/scsi/amiga7xx.c

   1 /*
   2  * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
   3  *              Amiga MacroSystemUS WarpEngine SCSI controller.
   4  *              Amiga Technologies A4000T SCSI controller.
   5  *              Amiga Technologies/DKB A4091 SCSI controller.
   6  *
   7  * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
   8  * plus modifications of the 53c7xx.c driver to support the Amiga.
   9  */
  10 #include <linux/types.h>
  11 #include <linux/mm.h>
  12 #include <linux/blkdev.h>
  13 #include <linux/sched.h>
  14 #include <linux/version.h>
  15 #include <linux/config.h>
  16 #include <linux/zorro.h>
  17 #include <linux/stat.h>
  18
  19 #include <asm/setup.h>
  20 #include <asm/page.h>
  21 #include <asm/pgtable.h>
  22 #include <asm/amigaints.h>
  23 #include <asm/amigahw.h>
  24 #include <asm/dma.h>
  25 #include <asm/irq.h>
  26
  27 #include "scsi.h"
  28 #include <scsi/scsi_host.h>
  29 #include "53c7xx.h"
  30 #include "amiga7xx.h"
  31
  32
  33 static int amiga7xx_register_one(Scsi_Host_Template *tpnt,
  34                                  unsigned long address)
  35 {
  36     long long options;
  37     int clock;
  38
  39     if (!request_mem_region(address, 0x1000, "ncr53c710"))
  40         return 0;
  41
  42     address = (unsigned long)z_ioremap(address, 0x1000);
  43     options = OPTION_MEMORY_MAPPED | OPTION_DEBUG_TEST1 | OPTION_INTFLY |
  44               OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS |
  45               OPTION_DISCONNECT;
  46     clock = 50000000;   /* 50 MHz SCSI Clock */
  47     ncr53c7xx_init(tpnt, 0, 710, address, 0, IRQ_AMIGA_PORTS, DMA_NONE,
  48                    options, clock);
  49     return 1;
  50 }
  51
  52
  53 #ifdef CONFIG_ZORRO
  54
  55 static struct {
  56     zorro_id id;
  57     unsigned long offset;
  58     int absolute;       /* offset is absolute address */
  59 } amiga7xx_table[] = {
  60     { .id = ZORRO_PROD_PHASE5_BLIZZARD_603E_PLUS, .offset = 0xf40000,
  61       .absolute = 1 },
  62     { .id = ZORRO_PROD_MACROSYSTEMS_WARP_ENGINE_40xx, .offset = 0x40000 },
  63     { .id = ZORRO_PROD_CBM_A4091_1, .offset = 0x800000 },
  64     { .id = ZORRO_PROD_CBM_A4091_2, .offset = 0x800000 },
  65     { .id = ZORRO_PROD_GVP_GFORCE_040_060, .offset = 0x40000 },
  66     { 0 }
  67 };
  68
  69 static int __init amiga7xx_zorro_detect(Scsi_Host_Template *tpnt)
  70 {
  71     int num = 0, i;
  72     struct zorro_dev *z = NULL;
  73     unsigned long address;
  74
  75     while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
  76         for (i = 0; amiga7xx_table[i].id; i++)
  77             if (z->id == amiga7xx_table[i].id)
  78                 break;
  79         if (!amiga7xx_table[i].id)
  80             continue;
  81         if (amiga7xx_table[i].absolute)
  82             address = amiga7xx_table[i].offset;
  83         else
  84             address = z->resource.start + amiga7xx_table[i].offset;
  85         num += amiga7xx_register_one(tpnt, address);
  86     }
  87     return num;
  88 }
  89
  90 #endif /* CONFIG_ZORRO */
  91
  92
  93 int __init amiga7xx_detect(Scsi_Host_Template *tpnt)
  94 {
  95     static unsigned char called = 0;
  96     int num = 0;
  97
  98     if (called || !MACH_IS_AMIGA)
  99         return 0;
 100
 101     tpnt->proc_name = "Amiga7xx";
 102
 103     if (AMIGAHW_PRESENT(A4000_SCSI))
 104         num += amiga7xx_register_one(tpnt, 0xdd0040);
 105
 106 #ifdef CONFIG_ZORRO
 107     num += amiga7xx_zorro_detect(tpnt);
 108 #endif
 109
 110     called = 1;
 111     return num;
 112 }
 113
 114 static int amiga7xx_release(struct Scsi_Host *shost)
 115 {
 116         if (shost->irq)
 117                 free_irq(shost->irq, NULL);
 118         if (shost->dma_channel != 0xff)
 119                 free_dma(shost->dma_channel);
 120         if (shost->io_port && shost->n_io_port)
 121                 release_region(shost->io_port, shost->n_io_port);
 122         scsi_unregister(shost);
 123         return 0;
 124 }
 125
 126 static Scsi_Host_Template driver_template = {
 127         .name                   = "Amiga NCR53c710 SCSI",
 128         .detect                 = amiga7xx_detect,
 129         .release                = amiga7xx_release,
 130         .queuecommand           = NCR53c7xx_queue_command,
 131         .abort                  = NCR53c7xx_abort,
 132         .reset                  = NCR53c7xx_reset,
 133         .can_queue              = 24,
 134         .this_id                = 7,
 135         .sg_tablesize           = 63,
 136         .cmd_per_lun            = 3,
 137         .use_clustering         = DISABLE_CLUSTERING
 138 };
 139
 140
 141 #include "scsi_module.c"