drivers/scsi/arm/cumana_1.c

   1 /*
   2  * Generic Generic NCR5380 driver
   3  *
   4  * Copyright 1995-2002, Russell King
   5  */
   6 #include <linux/module.h>
   7 #include <linux/signal.h>
   8 #include <linux/ioport.h>
   9 #include <linux/delay.h>
  10 #include <linux/blkdev.h>
  11 #include <linux/init.h>
  12
  13 #include <asm/ecard.h>
  14 #include <asm/io.h>
  15
  16 #include "../scsi.h"
  17 #include <scsi/scsi_host.h>
  18
  19 #include <scsi/scsicam.h>
  20
  21 #define AUTOSENSE
  22 #define PSEUDO_DMA
  23
  24 #define CUMANASCSI_PUBLIC_RELEASE 1
  25
  26 #define priv(host)                      ((struct NCR5380_hostdata *)(host)->hostdata)
  27 #define NCR5380_local_declare()         struct Scsi_Host *_instance
  28 #define NCR5380_setup(instance)         _instance = instance
  29 #define NCR5380_read(reg)               cumanascsi_read(_instance, reg)
  30 #define NCR5380_write(reg, value)       cumanascsi_write(_instance, reg, value)
  31 #define NCR5380_intr                    cumanascsi_intr
  32 #define NCR5380_queue_command           cumanascsi_queue_command
  33
  34 #define NCR5380_implementation_fields   \
  35         unsigned ctrl;                  \
  36         void __iomem *base;             \
  37         void __iomem *dma
  38
  39 #define BOARD_NORMAL    0
  40 #define BOARD_NCR53C400 1
  41
  42 #include "../NCR5380.h"
  43
  44 void cumanascsi_setup(char *str, int *ints)
  45 {
  46 }
  47
  48 const char *cumanascsi_info(struct Scsi_Host *spnt)
  49 {
  50         return "";
  51 }
  52
  53 #define CTRL    0x16fc
  54 #define STAT    0x2004
  55 #define L(v)    (((v)<<16)|((v) & 0x0000ffff))
  56 #define H(v)    (((v)>>16)|((v) & 0xffff0000))
  57
  58 static inline int
  59 NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr, int len)
  60 {
  61   unsigned long *laddr;
  62   void __iomem *dma = priv(host)->dma + 0x2000;
  63
  64   if(!len) return 0;
  65
  66   writeb(0x02, priv(host)->base + CTRL);
  67   laddr = (unsigned long *)addr;
  68   while(len >= 32)
  69   {
  70     unsigned int status;
  71     unsigned long v;
  72     status = readb(priv(host)->base + STAT);
  73     if(status & 0x80)
  74       goto end;
  75     if(!(status & 0x40))
  76       continue;
  77     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  78     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  79     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  80     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  81     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  82     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  83     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  84     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  85     len -= 32;
  86     if(len == 0)
  87       break;
  88   }
  89
  90   addr = (unsigned char *)laddr;
  91   writeb(0x12, priv(host)->base + CTRL);
  92
  93   while(len > 0)
  94   {
  95     unsigned int status;
  96     status = readb(priv(host)->base + STAT);
  97     if(status & 0x80)
  98       goto end;
  99     if(status & 0x40)
 100     {
 101       writeb(*addr++, dma);
 102       if(--len == 0)
 103         break;
 104     }
 105
 106     status = readb(priv(host)->base + STAT);
 107     if(status & 0x80)
 108       goto end;
 109     if(status & 0x40)
 110     {
 111       writeb(*addr++, dma);
 112       if(--len == 0)
 113         break;
 114     }
 115   }
 116 end:
 117   writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
 118   return len;
 119 }
 120
 121 static inline int
 122 NCR5380_pread(struct Scsi_Host *host, unsigned char *addr, int len)
 123 {
 124   unsigned long *laddr;
 125   void __iomem *dma = priv(host)->dma + 0x2000;
 126
 127   if(!len) return 0;
 128
 129   writeb(0x00, priv(host)->base + CTRL);
 130   laddr = (unsigned long *)addr;
 131   while(len >= 32)
 132   {
 133     unsigned int status;
 134     status = readb(priv(host)->base + STAT);
 135     if(status & 0x80)
 136       goto end;
 137     if(!(status & 0x40))
 138       continue;
 139     *laddr++ = readw(dma) | (readw(dma) << 16);
 140     *laddr++ = readw(dma) | (readw(dma) << 16);
 141     *laddr++ = readw(dma) | (readw(dma) << 16);
 142     *laddr++ = readw(dma) | (readw(dma) << 16);
 143     *laddr++ = readw(dma) | (readw(dma) << 16);
 144     *laddr++ = readw(dma) | (readw(dma) << 16);
 145     *laddr++ = readw(dma) | (readw(dma) << 16);
 146     *laddr++ = readw(dma) | (readw(dma) << 16);
 147     len -= 32;
 148     if(len == 0)
 149       break;
 150   }
 151
 152   addr = (unsigned char *)laddr;
 153   writeb(0x10, priv(host)->base + CTRL);
 154
 155   while(len > 0)
 156   {
 157     unsigned int status;
 158     status = readb(priv(host)->base + STAT);
 159     if(status & 0x80)
 160       goto end;
 161     if(status & 0x40)
 162     {
 163       *addr++ = readb(dma);
 164       if(--len == 0)
 165         break;
 166     }
 167
 168     status = readb(priv(host)->base + STAT);
 169     if(status & 0x80)
 170       goto end;
 171     if(status & 0x40)
 172     {
 173       *addr++ = readb(dma);
 174       if(--len == 0)
 175         break;
 176     }
 177   }
 178 end:
 179   writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
 180   return len;
 181 }
 182
 183 static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
 184 {
 185         void __iomem *base = priv(host)->base;
 186         unsigned char val;
 187
 188         writeb(0, base + CTRL);
 189
 190         val = readb(base + 0x2100 + (reg << 2));
 191
 192         priv(host)->ctrl = 0x40;
 193         writeb(0x40, base + CTRL);
 194
 195         return val;
 196 }
 197
 198 static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
 199 {
 200         void __iomem *base = priv(host)->base;
 201
 202         writeb(0, base + CTRL);
 203
 204         writeb(value, base + 0x2100 + (reg << 2));
 205
 206         priv(host)->ctrl = 0x40;
 207         writeb(0x40, base + CTRL);
 208 }
 209
 210 #include "../NCR5380.c"
 211
 212 static struct scsi_host_template cumanascsi_template = {
 213         .module                 = THIS_MODULE,
 214         .name                   = "Cumana 16-bit SCSI",
 215         .info                   = cumanascsi_info,
 216         .queuecommand           = cumanascsi_queue_command,
 217         .eh_abort_handler       = NCR5380_abort,
 218         .eh_bus_reset_handler   = NCR5380_bus_reset,
 219         .can_queue              = 16,
 220         .this_id                = 7,
 221         .sg_tablesize           = SG_ALL,
 222         .cmd_per_lun            = 2,
 223         .use_clustering         = DISABLE_CLUSTERING,
 224         .proc_name              = "CumanaSCSI-1",
 225 };
 226
 227 static int cumanascsi1_probe(struct expansion_card *ec,
 228                              const struct ecard_id *id)
 229 {
 230         struct Scsi_Host *host;
 231         int ret;
 232
 233         ret = ecard_request_resources(ec);
 234         if (ret)
 235                 goto out;
 236
 237         host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
 238         if (!host) {
 239                 ret = -ENOMEM;
 240                 goto out_release;
 241         }
 242
 243         priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
 244                                    ecard_resource_len(ec, ECARD_RES_IOCSLOW));
 245         priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
 246                                   ecard_resource_len(ec, ECARD_RES_MEMC));
 247         if (!priv(host)->base || !priv(host)->dma) {
 248                 ret = -ENOMEM;
 249                 goto out_unmap;
 250         }
 251
 252         host->irq = ec->irq;
 253
 254         NCR5380_init(host, 0);
 255
 256         priv(host)->ctrl = 0;
 257         writeb(0, priv(host)->base + CTRL);
 258
 259         host->n_io_port = 255;
 260         if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
 261                 ret = -EBUSY;
 262                 goto out_unmap;
 263         }
 264
 265         ret = request_irq(host->irq, cumanascsi_intr, IRQF_DISABLED,
 266                           "CumanaSCSI-1", host);
 267         if (ret) {
 268                 printk("scsi%d: IRQ%d not free: %d\n",
 269                     host->host_no, host->irq, ret);
 270                 goto out_unmap;
 271         }
 272
 273         printk("scsi%d: at port 0x%08lx irq %d",
 274                 host->host_no, host->io_port, host->irq);
 275         printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
 276                 host->can_queue, host->cmd_per_lun, CUMANASCSI_PUBLIC_RELEASE);
 277         printk("\nscsi%d:", host->host_no);
 278         NCR5380_print_options(host);
 279         printk("\n");
 280
 281         ret = scsi_add_host(host, &ec->dev);
 282         if (ret)
 283                 goto out_free_irq;
 284
 285         scsi_scan_host(host);
 286         goto out;
 287
 288  out_free_irq:
 289         free_irq(host->irq, host);
 290  out_unmap:
 291         iounmap(priv(host)->base);
 292         iounmap(priv(host)->dma);
 293         scsi_host_put(host);
 294  out_release:
 295         ecard_release_resources(ec);
 296  out:
 297         return ret;
 298 }
 299
 300 static void cumanascsi1_remove(struct expansion_card *ec)
 301 {
 302         struct Scsi_Host *host = ecard_get_drvdata(ec);
 303
 304         ecard_set_drvdata(ec, NULL);
 305
 306         scsi_remove_host(host);
 307         free_irq(host->irq, host);
 308         NCR5380_exit(host);
 309         iounmap(priv(host)->base);
 310         iounmap(priv(host)->dma);
 311         scsi_host_put(host);
 312         ecard_release_resources(ec);
 313 }
 314
 315 static const struct ecard_id cumanascsi1_cids[] = {
 316         { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
 317         { 0xffff, 0xffff }
 318 };
 319
 320 static struct ecard_driver cumanascsi1_driver = {
 321         .probe          = cumanascsi1_probe,
 322         .remove         = cumanascsi1_remove,
 323         .id_table       = cumanascsi1_cids,
 324         .drv = {
 325                 .name           = "cumanascsi1",
 326         },
 327 };
 328
 329 static int __init cumanascsi_init(void)
 330 {
 331         return ecard_register_driver(&cumanascsi1_driver);
 332 }
 333
 334 static void __exit cumanascsi_exit(void)
 335 {
 336         ecard_remove_driver(&cumanascsi1_driver);
 337 }
 338
 339 module_init(cumanascsi_init);
 340 module_exit(cumanascsi_exit);
 341
 342 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
 343 MODULE_LICENSE("GPL");