drivers/scsi/arm/oak.c

   1 /*
   2  * Oak Generic NCR5380 driver
   3  *
   4  * Copyright 1995-2002, Russell King
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/signal.h>
   9 #include <linux/ioport.h>
  10 #include <linux/delay.h>
  11 #include <linux/blkdev.h>
  12 #include <linux/init.h>
  13
  14 #include <asm/ecard.h>
  15 #include <asm/io.h>
  16
  17 #include "../scsi.h"
  18 #include <scsi/scsi_host.h>
  19
  20 #define AUTOSENSE
  21 /*#define PSEUDO_DMA*/
  22
  23 #define OAKSCSI_PUBLIC_RELEASE 1
  24 #define DONT_USE_INTR
  25
  26 #define priv(host)                      ((struct NCR5380_hostdata *)(host)->hostdata)
  27 #define NCR5380_local_declare()         void __iomem *_base
  28 #define NCR5380_setup(host)             _base = priv(host)->base
  29
  30 #define NCR5380_read(reg)               readb(_base + ((reg) << 2))
  31 #define NCR5380_write(reg, value)       writeb(value, _base + ((reg) << 2))
  32 #define NCR5380_intr                    oakscsi_intr
  33 #define NCR5380_queue_command           oakscsi_queue_command
  34 #define NCR5380_show_info               oakscsi_show_info
  35 #define NCR5380_write_info              oakscsi_write_info
  36
  37 #define NCR5380_implementation_fields   \
  38         void __iomem *base
  39
  40 #define BOARD_NORMAL    0
  41 #define BOARD_NCR53C400 1
  42
  43 #include "../NCR5380.h"
  44
  45 #undef START_DMA_INITIATOR_RECEIVE_REG
  46 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
  47
  48 const char * oakscsi_info (struct Scsi_Host *spnt)
  49 {
  50         return "";
  51 }
  52
  53 #define STAT    ((128 + 16) << 2)
  54 #define DATA    ((128 + 8) << 2)
  55
  56 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr,
  57               int len)
  58 {
  59   void __iomem *base = priv(instance)->base;
  60
  61 printk("writing %p len %d\n",addr, len);
  62   if(!len) return -1;
  63
  64   while(1)
  65   {
  66     int status;
  67     while (((status = readw(base + STAT)) & 0x100)==0);
  68   }
  69 }
  70
  71 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr,
  72               int len)
  73 {
  74   void __iomem *base = priv(instance)->base;
  75 printk("reading %p len %d\n", addr, len);
  76   while(len > 0)
  77   {
  78     unsigned int status, timeout;
  79     unsigned long b;
  80
  81     timeout = 0x01FFFFFF;
  82
  83     while (((status = readw(base + STAT)) & 0x100)==0)
  84     {
  85       timeout--;
  86       if(status & 0x200 || !timeout)
  87       {
  88         printk("status = %08X\n", status);
  89         return 1;
  90       }
  91     }
  92
  93     if(len >= 128)
  94     {
  95       readsw(base + DATA, addr, 128);
  96       addr += 128;
  97       len -= 128;
  98     }
  99     else
 100     {
 101       b = (unsigned long) readw(base + DATA);
 102       *addr ++ = b;
 103       len -= 1;
 104       if(len)
 105         *addr ++ = b>>8;
 106       len -= 1;
 107     }
 108   }
 109   return 0;
 110 }
 111
 112 #undef STAT
 113 #undef DATA
 114
 115 #include "../NCR5380.c"
 116
 117 static struct scsi_host_template oakscsi_template = {
 118         .module                 = THIS_MODULE,
 119         .show_info              = oakscsi_show_info,
 120         .write_info             = oakscsi_write_info,
 121         .name                   = "Oak 16-bit SCSI",
 122         .info                   = oakscsi_info,
 123         .queuecommand           = oakscsi_queue_command,
 124         .eh_abort_handler       = NCR5380_abort,
 125         .eh_bus_reset_handler   = NCR5380_bus_reset,
 126         .can_queue              = 16,
 127         .this_id                = 7,
 128         .sg_tablesize           = SG_ALL,
 129         .cmd_per_lun            = 2,
 130         .use_clustering         = DISABLE_CLUSTERING,
 131         .proc_name              = "oakscsi",
 132 };
 133
 134 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
 135 {
 136         struct Scsi_Host *host;
 137         int ret = -ENOMEM;
 138
 139         ret = ecard_request_resources(ec);
 140         if (ret)
 141                 goto out;
 142
 143         host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
 144         if (!host) {
 145                 ret = -ENOMEM;
 146                 goto release;
 147         }
 148
 149         priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
 150                                    ecard_resource_len(ec, ECARD_RES_MEMC));
 151         if (!priv(host)->base) {
 152                 ret = -ENOMEM;
 153                 goto unreg;
 154         }
 155
 156         host->irq = IRQ_NONE;
 157         host->n_io_port = 255;
 158
 159         NCR5380_init(host, 0);
 160
 161         printk("scsi%d: at port 0x%08lx irqs disabled",
 162                 host->host_no, host->io_port);
 163         printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
 164                 host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE);
 165         printk("\nscsi%d:", host->host_no);
 166         NCR5380_print_options(host);
 167         printk("\n");
 168
 169         ret = scsi_add_host(host, &ec->dev);
 170         if (ret)
 171                 goto out_unmap;
 172
 173         scsi_scan_host(host);
 174         goto out;
 175
 176  out_unmap:
 177         iounmap(priv(host)->base);
 178  unreg:
 179         scsi_host_put(host);
 180  release:
 181         ecard_release_resources(ec);
 182  out:
 183         return ret;
 184 }
 185
 186 static void oakscsi_remove(struct expansion_card *ec)
 187 {
 188         struct Scsi_Host *host = ecard_get_drvdata(ec);
 189
 190         ecard_set_drvdata(ec, NULL);
 191         scsi_remove_host(host);
 192
 193         NCR5380_exit(host);
 194         iounmap(priv(host)->base);
 195         scsi_host_put(host);
 196         ecard_release_resources(ec);
 197 }
 198
 199 static const struct ecard_id oakscsi_cids[] = {
 200         { MANU_OAK, PROD_OAK_SCSI },
 201         { 0xffff, 0xffff }
 202 };
 203
 204 static struct ecard_driver oakscsi_driver = {
 205         .probe          = oakscsi_probe,
 206         .remove         = oakscsi_remove,
 207         .id_table       = oakscsi_cids,
 208         .drv = {
 209                 .name           = "oakscsi",
 210         },
 211 };
 212
 213 static int __init oakscsi_init(void)
 214 {
 215         return ecard_register_driver(&oakscsi_driver);
 216 }
 217
 218 static void __exit oakscsi_exit(void)
 219 {
 220         ecard_remove_driver(&oakscsi_driver);
 221 }
 222
 223 module_init(oakscsi_init);
 224 module_exit(oakscsi_exit);
 225
 226 MODULE_AUTHOR("Russell King");
 227 MODULE_DESCRIPTION("Oak SCSI driver");
 228 MODULE_LICENSE("GPL");
 229