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/sched.h>
  10 #include <linux/ioport.h>
  11 #include <linux/delay.h>
  12 #include <linux/blkdev.h>
  13 #include <linux/init.h>
  14
  15 #include <asm/ecard.h>
  16 #include <asm/io.h>
  17 #include <asm/system.h>
  18
  19 #include "../scsi.h"
  20 #include <scsi/scsi_host.h>
  21
  22 #define AUTOSENSE
  23 /*#define PSEUDO_DMA*/
  24
  25 #define OAKSCSI_PUBLIC_RELEASE 1
  26
  27 #define NCR5380_read(reg)               oakscsi_read(_instance, reg)
  28 #define NCR5380_write(reg, value)       oakscsi_write(_instance, reg, value)
  29 #define NCR5380_intr                    oakscsi_intr
  30 #define NCR5380_queue_command           oakscsi_queue_command
  31 #define NCR5380_proc_info               oakscsi_proc_info
  32
  33 #define NCR5380_implementation_fields   int port, ctrl
  34 #define NCR5380_local_declare()         struct Scsi_Host *_instance
  35 #define NCR5380_setup(instance)         _instance = instance
  36
  37 #define BOARD_NORMAL    0
  38 #define BOARD_NCR53C400 1
  39
  40 #include "../NCR5380.h"
  41
  42 #undef START_DMA_INITIATOR_RECEIVE_REG
  43 #define START_DMA_INITIATOR_RECEIVE_REG (7 + 128)
  44
  45 const char * oakscsi_info (struct Scsi_Host *spnt)
  46 {
  47         return "";
  48 }
  49
  50 #define STAT(p)   inw(p + 144)
  51 extern void inswb(int from, void *to, int len);
  52
  53 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr,
  54               int len)
  55 {
  56   int iobase = instance->io_port;
  57 printk("writing %p len %d\n",addr, len);
  58   if(!len) return -1;
  59
  60   while(1)
  61   {
  62     int status;
  63     while(((status = STAT(iobase)) & 0x100)==0);
  64   }
  65 }
  66
  67 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr,
  68               int len)
  69 {
  70   int iobase = instance->io_port;
  71 printk("reading %p len %d\n", addr, len);
  72   while(len > 0)
  73   {
  74     int status, timeout;
  75     unsigned long b;
  76
  77     timeout = 0x01FFFFFF;
  78
  79     while(((status = STAT(iobase)) & 0x100)==0)
  80     {
  81       timeout--;
  82       if(status & 0x200 || !timeout)
  83       {
  84         printk("status = %08X\n",status);
  85         return 1;
  86       }
  87     }
  88     if(len >= 128)
  89     {
  90       inswb(iobase + 136, addr, 128);
  91       addr += 128;
  92       len -= 128;
  93     }
  94     else
  95     {
  96       b = (unsigned long) inw(iobase + 136);
  97       *addr ++ = b;
  98       len -= 1;
  99       if(len)
 100         *addr ++ = b>>8;
 101       len -= 1;
 102     }
 103   }
 104   return 0;
 105 }
 106
 107 #define oakscsi_read(instance,reg)      (inb((instance)->io_port + (reg)))
 108 #define oakscsi_write(instance,reg,val) (outb((val), (instance)->io_port + (reg)))
 109
 110 #undef STAT
 111
 112 #include "../NCR5380.c"
 113
 114 static Scsi_Host_Template oakscsi_template = {
 115         .module                 = THIS_MODULE,
 116         .proc_info              = oakscsi_proc_info,
 117         .name                   = "Oak 16-bit SCSI",
 118         .info                   = oakscsi_info,
 119         .queuecommand           = oakscsi_queue_command,
 120         .eh_abort_handler       = NCR5380_abort,
 121         .eh_device_reset_handler= NCR5380_device_reset,
 122         .eh_bus_reset_handler   = NCR5380_bus_reset,
 123         .eh_host_reset_handler  = NCR5380_host_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 __devinit
 133 oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
 134 {
 135         struct Scsi_Host *host;
 136         int ret = -ENOMEM;
 137
 138         host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
 139         if (!host)
 140                 goto out;
 141
 142         host->io_port = ecard_address(ec, ECARD_MEMC, 0);
 143         host->irq = IRQ_NONE;
 144         host->n_io_port = 255;
 145
 146         ret = -EBUSY;
 147         if (!request_region (host->io_port, host->n_io_port, "Oak SCSI"))
 148                 goto unreg;
 149
 150         NCR5380_init(host, 0);
 151
 152         printk("scsi%d: at port 0x%08lx irqs disabled",
 153                 host->host_no, host->io_port);
 154         printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
 155                 host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE);
 156         printk("\nscsi%d:", host->host_no);
 157         NCR5380_print_options(host);
 158         printk("\n");
 159
 160         ret = scsi_add_host(host, &ec->dev);
 161         if (ret)
 162                 goto out_release;
 163
 164         scsi_scan_host(host);
 165         goto out;
 166
 167  out_release:
 168         release_region(host->io_port, host->n_io_port);
 169  unreg:
 170         scsi_host_put(host);
 171  out:
 172         return ret;
 173 }
 174
 175 static void __devexit oakscsi_remove(struct expansion_card *ec)
 176 {
 177         struct Scsi_Host *host = ecard_get_drvdata(ec);
 178
 179         ecard_set_drvdata(ec, NULL);
 180         scsi_remove_host(host);
 181
 182         NCR5380_exit(host);
 183         release_region(host->io_port, host->n_io_port);
 184         scsi_host_put(host);
 185 }
 186
 187 static const struct ecard_id oakscsi_cids[] = {
 188         { MANU_OAK, PROD_OAK_SCSI },
 189         { 0xffff, 0xffff }
 190 };
 191
 192 static struct ecard_driver oakscsi_driver = {
 193         .probe          = oakscsi_probe,
 194         .remove         = __devexit_p(oakscsi_remove),
 195         .id_table       = oakscsi_cids,
 196         .drv = {
 197                 .name           = "oakscsi",
 198         },
 199 };
 200
 201 static int __init oakscsi_init(void)
 202 {
 203         return ecard_register_driver(&oakscsi_driver);
 204 }
 205
 206 static void __exit oakscsi_exit(void)
 207 {
 208         ecard_remove_driver(&oakscsi_driver);
 209 }
 210
 211 module_init(oakscsi_init);
 212 module_exit(oakscsi_exit);
 213
 214 MODULE_AUTHOR("Russell King");
 215 MODULE_DESCRIPTION("Oak SCSI driver");
 216 MODULE_LICENSE("GPL");
 217