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 #define NCR5380_proc_info               cumanascsi_proc_info
  34
  35 #define NCR5380_implementation_fields   \
  36         unsigned ctrl;                  \
  37         void __iomem *base;             \
  38         void __iomem *dma
  39
  40 #define BOARD_NORMAL    0
  41 #define BOARD_NCR53C400 1
  42
  43 #include "../NCR5380.h"
  44
  45 void cumanascsi_setup(char *str, int *ints)
  46 {
  47 }
  48
  49 const char *cumanascsi_info(struct Scsi_Host *spnt)
  50 {
  51         return "";
  52 }
  53
  54 #define CTRL    0x16fc
  55 #define STAT    0x2004
  56 #define L(v)    (((v)<<16)|((v) & 0x0000ffff))
  57 #define H(v)    (((v)>>16)|((v) & 0xffff0000))
  58
  59 static inline int
  60 NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr, int len)
  61 {
  62   unsigned long *laddr;
  63   void __iomem *dma = priv(host)->dma + 0x2000;
  64
  65   if(!len) return 0;
  66
  67   writeb(0x02, priv(host)->base + CTRL);
  68   laddr = (unsigned long *)addr;
  69   while(len >= 32)
  70   {
  71     unsigned int status;
  72     unsigned long v;
  73     status = readb(priv(host)->base + STAT);
  74     if(status & 0x80)
  75       goto end;
  76     if(!(status & 0x40))
  77       continue;
  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     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  86     len -= 32;
  87     if(len == 0)
  88       break;
  89   }
  90
  91   addr = (unsigned char *)laddr;
  92   writeb(0x12, priv(host)->base + CTRL);
  93
  94   while(len > 0)
  95   {
  96     unsigned int status;
  97     status = readb(priv(host)->base + STAT);
  98     if(status & 0x80)
  99       goto end;
 100     if(status & 0x40)
 101     {
 102       writeb(*addr++, dma);
 103       if(--len == 0)
 104         break;
 105     }
 106
 107     status = readb(priv(host)->base + STAT);
 108     if(status & 0x80)
 109       goto end;
 110     if(status & 0x40)
 111     {
 112       writeb(*addr++, dma);
 113       if(--len == 0)
 114         break;
 115     }
 116   }
 117 end:
 118   writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
 119   return len;
 120 }
 121
 122 static inline int
 123 NCR5380_pread(struct Scsi_Host *host, unsigned char *addr, int len)
 124 {
 125   unsigned long *laddr;
 126   void __iomem *dma = priv(host)->dma + 0x2000;
 127
 128   if(!len) return 0;
 129
 130   writeb(0x00, priv(host)->base + CTRL);
 131   laddr = (unsigned long *)addr;
 132   while(len >= 32)
 133   {
 134     unsigned int status;
 135     status = readb(priv(host)->base + STAT);
 136     if(status & 0x80)
 137       goto end;
 138     if(!(status & 0x40))
 139       continue;
 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     *laddr++ = readw(dma) | (readw(dma) << 16);
 148     len -= 32;
 149     if(len == 0)
 150       break;
 151   }
 152
 153   addr = (unsigned char *)laddr;
 154   writeb(0x10, priv(host)->base + CTRL);
 155
 156   while(len > 0)
 157   {
 158     unsigned int status;
 159     status = readb(priv(host)->base + STAT);
 160     if(status & 0x80)
 161       goto end;
 162     if(status & 0x40)
 163     {
 164       *addr++ = readb(dma);
 165       if(--len == 0)
 166         break;
 167     }
 168
 169     status = readb(priv(host)->base + STAT);
 170     if(status & 0x80)
 171       goto end;
 172     if(status & 0x40)
 173     {
 174       *addr++ = readb(dma);
 175       if(--len == 0)
 176         break;
 177     }
 178   }
 179 end:
 180   writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
 181   return len;
 182 }
 183
 184 static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
 185 {
 186         void __iomem *base = priv(host)->base;
 187         unsigned char val;
 188
 189         writeb(0, base + CTRL);
 190
 191         val = readb(base + 0x2100 + (reg << 2));
 192
 193         priv(host)->ctrl = 0x40;
 194         writeb(0x40, base + CTRL);
 195
 196         return val;
 197 }
 198
 199 static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
 200 {
 201         void __iomem *base = priv(host)->base;
 202
 203         writeb(0, base + CTRL);
 204
 205         writeb(value, base + 0x2100 + (reg << 2));
 206
 207         priv(host)->ctrl = 0x40;
 208         writeb(0x40, base + CTRL);
 209 }
 210
 211 #include "../NCR5380.c"
 212
 213 static struct scsi_host_template cumanascsi_template = {
 214         .module                 = THIS_MODULE,
 215         .name                   = "Cumana 16-bit SCSI",
 216         .info                   = cumanascsi_info,
 217         .queuecommand           = cumanascsi_queue_command,
 218         .eh_abort_handler       = NCR5380_abort,
 219         .eh_bus_reset_handler   = NCR5380_bus_reset,
 220         .can_queue              = 16,
 221         .this_id                = 7,
 222         .sg_tablesize           = SG_ALL,
 223         .cmd_per_lun            = 2,
 224         .use_clustering         = DISABLE_CLUSTERING,
 225         .proc_name              = "CumanaSCSI-1",
 226 };
 227
 228 static int __devinit
 229 cumanascsi1_probe(struct expansion_card *ec, const struct ecard_id *id)
 230 {
 231         struct Scsi_Host *host;
 232         int ret;
 233
 234         ret = ecard_request_resources(ec);
 235         if (ret)
 236                 goto out;
 237
 238         host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
 239         if (!host) {
 240                 ret = -ENOMEM;
 241                 goto out_release;
 242         }
 243
 244         priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
 245                                    ecard_resource_len(ec, ECARD_RES_IOCSLOW));
 246         priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
 247                                   ecard_resource_len(ec, ECARD_RES_MEMC));
 248         if (!priv(host)->base || !priv(host)->dma) {
 249                 ret = -ENOMEM;
 250                 goto out_unmap;
 251         }
 252
 253         host->irq = ec->irq;
 254
 255         NCR5380_init(host, 0);
 256
 257         priv(host)->ctrl = 0;
 258         writeb(0, priv(host)->base + CTRL);
 259
 260         host->n_io_port = 255;
 261         if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
 262                 ret = -EBUSY;
 263                 goto out_unmap;
 264         }
 265
 266         ret = request_irq(host->irq, cumanascsi_intr, IRQF_DISABLED,
 267                           "CumanaSCSI-1", host);
 268         if (ret) {
 269                 printk("scsi%d: IRQ%d not free: %d\n",
 270                     host->host_no, host->irq, ret);
 271                 goto out_unmap;
 272         }
 273
 274         printk("scsi%d: at port 0x%08lx irq %d",
 275                 host->host_no, host->io_port, host->irq);
 276         printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
 277                 host->can_queue, host->cmd_per_lun, CUMANASCSI_PUBLIC_RELEASE);
 278         printk("\nscsi%d:", host->host_no);
 279         NCR5380_print_options(host);
 280         printk("\n");
 281
 282         ret = scsi_add_host(host, &ec->dev);
 283         if (ret)
 284                 goto out_free_irq;
 285
 286         scsi_scan_host(host);
 287         goto out;
 288
 289  out_free_irq:
 290         free_irq(host->irq, host);
 291  out_unmap:
 292         iounmap(priv(host)->base);
 293         iounmap(priv(host)->dma);
 294         scsi_host_put(host);
 295  out_release:
 296         ecard_release_resources(ec);
 297  out:
 298         return ret;
 299 }
 300
 301 static void __devexit cumanascsi1_remove(struct expansion_card *ec)
 302 {
 303         struct Scsi_Host *host = ecard_get_drvdata(ec);
 304
 305         ecard_set_drvdata(ec, NULL);
 306
 307         scsi_remove_host(host);
 308         free_irq(host->irq, host);
 309         NCR5380_exit(host);
 310         iounmap(priv(host)->base);
 311         iounmap(priv(host)->dma);
 312         scsi_host_put(host);
 313         ecard_release_resources(ec);
 314 }
 315
 316 static const struct ecard_id cumanascsi1_cids[] = {
 317         { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
 318         { 0xffff, 0xffff }
 319 };
 320
 321 static struct ecard_driver cumanascsi1_driver = {
 322         .probe          = cumanascsi1_probe,
 323         .remove         = __devexit_p(cumanascsi1_remove),
 324         .id_table       = cumanascsi1_cids,
 325         .drv = {
 326                 .name           = "cumanascsi1",
 327         },
 328 };
 329
 330 static int __init cumanascsi_init(void)
 331 {
 332         return ecard_register_driver(&cumanascsi1_driver);
 333 }
 334
 335 static void __exit cumanascsi_exit(void)
 336 {
 337         ecard_remove_driver(&cumanascsi1_driver);
 338 }
 339
 340 module_init(cumanascsi_init);
 341 module_exit(cumanascsi_exit);
 342
 343 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
 344 MODULE_LICENSE("GPL");