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