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