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 #include <asm/system.h>
  16
  17 #include "../scsi.h"
  18 #include <scsi/scsi_host.h>
  19
  20 #include <scsi/scsicam.h>
  21
  22 #define AUTOSENSE
  23 #define PSEUDO_DMA
  24
  25 #define CUMANASCSI_PUBLIC_RELEASE 1
  26
  27 #define NCR5380_implementation_fields   int port, ctrl
  28 #define NCR5380_local_declare()         struct Scsi_Host *_instance
  29 #define NCR5380_setup(instance)         _instance = instance
  30 #define NCR5380_read(reg)               cumanascsi_read(_instance, reg)
  31 #define NCR5380_write(reg, value)       cumanascsi_write(_instance, reg, value)
  32 #define NCR5380_intr                    cumanascsi_intr
  33 #define NCR5380_queue_command           cumanascsi_queue_command
  34 #define NCR5380_proc_info               cumanascsi_proc_info
  35
  36 #define BOARD_NORMAL    0
  37 #define BOARD_NCR53C400 1
  38
  39 #include "../NCR5380.h"
  40
  41 void cumanascsi_setup(char *str, int *ints)
  42 {
  43 }
  44
  45 const char *cumanascsi_info(struct Scsi_Host *spnt)
  46 {
  47         return "";
  48 }
  49
  50 #ifdef NOT_EFFICIENT
  51 #define CTRL(p,v)     outb(*ctrl = (v), (p) - 577)
  52 #define STAT(p)       inb((p)+1)
  53 #define IN(p)         inb((p))
  54 #define OUT(v,p)      outb((v), (p))
  55 #else
  56 #define CTRL(p,v)       (p[-2308] = (*ctrl = (v)))
  57 #define STAT(p)         (p[4])
  58 #define IN(p)           (*(p))
  59 #define IN2(p)          ((unsigned short)(*(volatile unsigned long *)(p)))
  60 #define OUT(v,p)        (*(p) = (v))
  61 #define OUT2(v,p)       (*((volatile unsigned long *)(p)) = (v))
  62 #endif
  63 #define L(v)            (((v)<<16)|((v) & 0x0000ffff))
  64 #define H(v)            (((v)>>16)|((v) & 0xffff0000))
  65
  66 static inline int
  67 NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, int len)
  68 {
  69   int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl;
  70   int oldctrl = *ctrl;
  71   unsigned long *laddr;
  72 #ifdef NOT_EFFICIENT
  73   int iobase = instance->io_port;
  74   int dma_io = iobase & ~(0x3C0000>>2);
  75 #else
  76   volatile unsigned char *iobase = (unsigned char *)ioaddr(instance->io_port);
  77   volatile unsigned char *dma_io = (unsigned char *)((int)iobase & ~0x3C0000);
  78 #endif
  79
  80   if(!len) return 0;
  81
  82   CTRL(iobase, 0x02);
  83   laddr = (unsigned long *)addr;
  84   while(len >= 32)
  85   {
  86     int status;
  87     unsigned long v;
  88     status = STAT(iobase);
  89     if(status & 0x80)
  90       goto end;
  91     if(!(status & 0x40))
  92       continue;
  93     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
  94     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
  95     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
  96     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
  97     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
  98     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
  99     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
 100     v=*laddr++; OUT2(L(v),dma_io); OUT2(H(v),dma_io);
 101     len -= 32;
 102     if(len == 0)
 103       break;
 104   }
 105
 106   addr = (unsigned char *)laddr;
 107   CTRL(iobase, 0x12);
 108   while(len > 0)
 109   {
 110     int status;
 111     status = STAT(iobase);
 112     if(status & 0x80)
 113       goto end;
 114     if(status & 0x40)
 115     {
 116       OUT(*addr++, dma_io);
 117       if(--len == 0)
 118         break;
 119     }
 120
 121     status = STAT(iobase);
 122     if(status & 0x80)
 123       goto end;
 124     if(status & 0x40)
 125     {
 126       OUT(*addr++, dma_io);
 127       if(--len == 0)
 128         break;
 129     }
 130   }
 131 end:
 132   CTRL(iobase, oldctrl|0x40);
 133   return len;
 134 }
 135
 136 static inline int
 137 NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, int len)
 138 {
 139   int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl;
 140   int oldctrl = *ctrl;
 141   unsigned long *laddr;
 142 #ifdef NOT_EFFICIENT
 143   int iobase = instance->io_port;
 144   int dma_io = iobase & ~(0x3C0000>>2);
 145 #else
 146   volatile unsigned char *iobase = (unsigned char *)ioaddr(instance->io_port);
 147   volatile unsigned char *dma_io = (unsigned char *)((int)iobase & ~0x3C0000);
 148 #endif
 149
 150   if(!len) return 0;
 151
 152   CTRL(iobase, 0x00);
 153   laddr = (unsigned long *)addr;
 154   while(len >= 32)
 155   {
 156     int status;
 157     status = STAT(iobase);
 158     if(status & 0x80)
 159       goto end;
 160     if(!(status & 0x40))
 161       continue;
 162     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 163     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 164     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 165     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 166     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 167     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 168     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 169     *laddr++ = IN2(dma_io)|(IN2(dma_io)<<16);
 170     len -= 32;
 171     if(len == 0)
 172       break;
 173   }
 174
 175   addr = (unsigned char *)laddr;
 176   CTRL(iobase, 0x10);
 177   while(len > 0)
 178   {
 179     int status;
 180     status = STAT(iobase);
 181     if(status & 0x80)
 182       goto end;
 183     if(status & 0x40)
 184     {
 185       *addr++ = IN(dma_io);
 186       if(--len == 0)
 187         break;
 188     }
 189
 190     status = STAT(iobase);
 191     if(status & 0x80)
 192       goto end;
 193     if(status & 0x40)
 194     {
 195       *addr++ = IN(dma_io);
 196       if(--len == 0)
 197         break;
 198     }
 199   }
 200 end:
 201   CTRL(iobase, oldctrl|0x40);
 202   return len;
 203 }
 204
 205 #undef STAT
 206 #undef CTRL
 207 #undef IN
 208 #undef OUT
 209
 210 #define CTRL(p,v) outb(*ctrl = (v), (p) - 577)
 211
 212 static char cumanascsi_read(struct Scsi_Host *instance, int reg)
 213 {
 214         unsigned int iobase = instance->io_port;
 215         int i;
 216         int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl;
 217
 218         CTRL(iobase, 0);
 219         i = inb(iobase + 64 + reg);
 220         CTRL(iobase, 0x40);
 221
 222         return i;
 223 }
 224
 225 static void cumanascsi_write(struct Scsi_Host *instance, int reg, int value)
 226 {
 227         int iobase = instance->io_port;
 228         int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl;
 229
 230         CTRL(iobase, 0);
 231         outb(value, iobase + 64 + reg);
 232         CTRL(iobase, 0x40);
 233 }
 234
 235 #undef CTRL
 236
 237 #include "../NCR5380.c"
 238
 239 static struct scsi_host_template cumanascsi_template = {
 240         .module                 = THIS_MODULE,
 241         .name                   = "Cumana 16-bit SCSI",
 242         .info                   = cumanascsi_info,
 243         .queuecommand           = cumanascsi_queue_command,
 244         .eh_abort_handler       = NCR5380_abort,
 245         .eh_bus_reset_handler   = NCR5380_bus_reset,
 246         .can_queue              = 16,
 247         .this_id                = 7,
 248         .sg_tablesize           = SG_ALL,
 249         .cmd_per_lun            = 2,
 250         .unchecked_isa_dma      = 0,
 251         .use_clustering         = DISABLE_CLUSTERING,
 252         .proc_name              = "CumanaSCSI-1",
 253 };
 254
 255 static int __devinit
 256 cumanascsi1_probe(struct expansion_card *ec, const struct ecard_id *id)
 257 {
 258         struct Scsi_Host *host;
 259         int ret = -ENOMEM;
 260
 261         host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
 262         if (!host)
 263                 goto out;
 264
 265         host->io_port = ecard_address(ec, ECARD_IOC, ECARD_SLOW) + 0x800;
 266         host->irq = ec->irq;
 267
 268         NCR5380_init(host, 0);
 269
 270         host->n_io_port = 255;
 271         if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
 272                 ret = -EBUSY;
 273                 goto out_free;
 274         }
 275
 276         ((struct NCR5380_hostdata *)host->hostdata)->ctrl = 0;
 277         outb(0x00, host->io_port - 577);
 278
 279         ret = request_irq(host->irq, cumanascsi_intr, IRQF_DISABLED,
 280                           "CumanaSCSI-1", host);
 281         if (ret) {
 282                 printk("scsi%d: IRQ%d not free: %d\n",
 283                     host->host_no, host->irq, ret);
 284                 goto out_release;
 285         }
 286
 287         printk("scsi%d: at port 0x%08lx irq %d",
 288                 host->host_no, host->io_port, host->irq);
 289         printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
 290                 host->can_queue, host->cmd_per_lun, CUMANASCSI_PUBLIC_RELEASE);
 291         printk("\nscsi%d:", host->host_no);
 292         NCR5380_print_options(host);
 293         printk("\n");
 294
 295         ret = scsi_add_host(host, &ec->dev);
 296         if (ret)
 297                 goto out_free_irq;
 298
 299         scsi_scan_host(host);
 300         goto out;
 301
 302  out_free_irq:
 303         free_irq(host->irq, host);
 304  out_release:
 305         release_region(host->io_port, host->n_io_port);
 306  out_free:
 307         scsi_host_put(host);
 308  out:
 309         return ret;
 310 }
 311
 312 static void __devexit cumanascsi1_remove(struct expansion_card *ec)
 313 {
 314         struct Scsi_Host *host = ecard_get_drvdata(ec);
 315
 316         ecard_set_drvdata(ec, NULL);
 317
 318         scsi_remove_host(host);
 319         free_irq(host->irq, host);
 320         NCR5380_exit(host);
 321         release_region(host->io_port, host->n_io_port);
 322         scsi_host_put(host);
 323 }
 324
 325 static const struct ecard_id cumanascsi1_cids[] = {
 326         { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
 327         { 0xffff, 0xffff }
 328 };
 329
 330 static struct ecard_driver cumanascsi1_driver = {
 331         .probe          = cumanascsi1_probe,
 332         .remove         = __devexit_p(cumanascsi1_remove),
 333         .id_table       = cumanascsi1_cids,
 334         .drv = {
 335                 .name           = "cumanascsi1",
 336         },
 337 };
 338
 339 static int __init cumanascsi_init(void)
 340 {
 341         return ecard_register_driver(&cumanascsi1_driver);
 342 }
 343
 344 static void __exit cumanascsi_exit(void)
 345 {
 346         ecard_remove_driver(&cumanascsi1_driver);
 347 }
 348
 349 module_init(cumanascsi_init);
 350 module_exit(cumanascsi_exit);
 351
 352 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
 353 MODULE_LICENSE("GPL");