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/ioport.h>
   8 #include <linux/blkdev.h>
   9 #include <linux/init.h>
  10
  11 #include <asm/ecard.h>
  12 #include <asm/io.h>
  13
  14 #include <scsi/scsi_host.h>
  15
  16 #define priv(host)                      ((struct NCR5380_hostdata *)(host)->hostdata)
  17 #define NCR5380_read(reg)               cumanascsi_read(instance, reg)
  18 #define NCR5380_write(reg, value)       cumanascsi_write(instance, reg, value)
  19
  20 #define NCR5380_dma_xfer_len(instance, cmd, phase)      (cmd->transfersize)
  21 #define NCR5380_dma_recv_setup          cumanascsi_pread
  22 #define NCR5380_dma_send_setup          cumanascsi_pwrite
  23 #define NCR5380_dma_residual(instance)  (0)
  24
  25 #define NCR5380_intr                    cumanascsi_intr
  26 #define NCR5380_queue_command           cumanascsi_queue_command
  27 #define NCR5380_info                    cumanascsi_info
  28
  29 #define NCR5380_implementation_fields   \
  30         unsigned ctrl;                  \
  31         void __iomem *base;             \
  32         void __iomem *dma
  33
  34 #include "../NCR5380.h"
  35
  36 void cumanascsi_setup(char *str, int *ints)
  37 {
  38 }
  39
  40 #define CTRL    0x16fc
  41 #define STAT    0x2004
  42 #define L(v)    (((v)<<16)|((v) & 0x0000ffff))
  43 #define H(v)    (((v)>>16)|((v) & 0xffff0000))
  44
  45 static inline int cumanascsi_pwrite(struct Scsi_Host *host,
  46                                     unsigned char *addr, int len)
  47 {
  48   unsigned long *laddr;
  49   void __iomem *dma = priv(host)->dma + 0x2000;
  50
  51   if(!len) return 0;
  52
  53   writeb(0x02, priv(host)->base + CTRL);
  54   laddr = (unsigned long *)addr;
  55   while(len >= 32)
  56   {
  57     unsigned int status;
  58     unsigned long v;
  59     status = readb(priv(host)->base + STAT);
  60     if(status & 0x80)
  61       goto end;
  62     if(!(status & 0x40))
  63       continue;
  64     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  65     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  66     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  67     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  68     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  69     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  70     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  71     v=*laddr++; writew(L(v), dma); writew(H(v), dma);
  72     len -= 32;
  73     if(len == 0)
  74       break;
  75   }
  76
  77   addr = (unsigned char *)laddr;
  78   writeb(0x12, priv(host)->base + CTRL);
  79
  80   while(len > 0)
  81   {
  82     unsigned int status;
  83     status = readb(priv(host)->base + STAT);
  84     if(status & 0x80)
  85       goto end;
  86     if(status & 0x40)
  87     {
  88       writeb(*addr++, dma);
  89       if(--len == 0)
  90         break;
  91     }
  92
  93     status = readb(priv(host)->base + STAT);
  94     if(status & 0x80)
  95       goto end;
  96     if(status & 0x40)
  97     {
  98       writeb(*addr++, dma);
  99       if(--len == 0)
 100         break;
 101     }
 102   }
 103 end:
 104   writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
 105
 106         if (len)
 107                 return -1;
 108         return 0;
 109 }
 110
 111 static inline int cumanascsi_pread(struct Scsi_Host *host,
 112                                    unsigned char *addr, int len)
 113 {
 114   unsigned long *laddr;
 115   void __iomem *dma = priv(host)->dma + 0x2000;
 116
 117   if(!len) return 0;
 118
 119   writeb(0x00, priv(host)->base + CTRL);
 120   laddr = (unsigned long *)addr;
 121   while(len >= 32)
 122   {
 123     unsigned int status;
 124     status = readb(priv(host)->base + STAT);
 125     if(status & 0x80)
 126       goto end;
 127     if(!(status & 0x40))
 128       continue;
 129     *laddr++ = readw(dma) | (readw(dma) << 16);
 130     *laddr++ = readw(dma) | (readw(dma) << 16);
 131     *laddr++ = readw(dma) | (readw(dma) << 16);
 132     *laddr++ = readw(dma) | (readw(dma) << 16);
 133     *laddr++ = readw(dma) | (readw(dma) << 16);
 134     *laddr++ = readw(dma) | (readw(dma) << 16);
 135     *laddr++ = readw(dma) | (readw(dma) << 16);
 136     *laddr++ = readw(dma) | (readw(dma) << 16);
 137     len -= 32;
 138     if(len == 0)
 139       break;
 140   }
 141
 142   addr = (unsigned char *)laddr;
 143   writeb(0x10, priv(host)->base + CTRL);
 144
 145   while(len > 0)
 146   {
 147     unsigned int status;
 148     status = readb(priv(host)->base + STAT);
 149     if(status & 0x80)
 150       goto end;
 151     if(status & 0x40)
 152     {
 153       *addr++ = readb(dma);
 154       if(--len == 0)
 155         break;
 156     }
 157
 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 end:
 169   writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
 170
 171         if (len)
 172                 return -1;
 173         return 0;
 174 }
 175
 176 static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
 177 {
 178         void __iomem *base = priv(host)->base;
 179         unsigned char val;
 180
 181         writeb(0, base + CTRL);
 182
 183         val = readb(base + 0x2100 + (reg << 2));
 184
 185         priv(host)->ctrl = 0x40;
 186         writeb(0x40, base + CTRL);
 187
 188         return val;
 189 }
 190
 191 static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
 192 {
 193         void __iomem *base = priv(host)->base;
 194
 195         writeb(0, base + CTRL);
 196
 197         writeb(value, base + 0x2100 + (reg << 2));
 198
 199         priv(host)->ctrl = 0x40;
 200         writeb(0x40, base + CTRL);
 201 }
 202
 203 #include "../NCR5380.c"
 204
 205 static struct scsi_host_template cumanascsi_template = {
 206         .module                 = THIS_MODULE,
 207         .name                   = "Cumana 16-bit SCSI",
 208         .info                   = cumanascsi_info,
 209         .queuecommand           = cumanascsi_queue_command,
 210         .eh_abort_handler       = NCR5380_abort,
 211         .eh_bus_reset_handler   = NCR5380_bus_reset,
 212         .can_queue              = 16,
 213         .this_id                = 7,
 214         .sg_tablesize           = SG_ALL,
 215         .cmd_per_lun            = 2,
 216         .use_clustering         = DISABLE_CLUSTERING,
 217         .proc_name              = "CumanaSCSI-1",
 218         .cmd_size               = NCR5380_CMD_SIZE,
 219         .max_sectors            = 128,
 220 };
 221
 222 static int cumanascsi1_probe(struct expansion_card *ec,
 223                              const struct ecard_id *id)
 224 {
 225         struct Scsi_Host *host;
 226         int ret;
 227
 228         ret = ecard_request_resources(ec);
 229         if (ret)
 230                 goto out;
 231
 232         host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
 233         if (!host) {
 234                 ret = -ENOMEM;
 235                 goto out_release;
 236         }
 237
 238         priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
 239                                    ecard_resource_len(ec, ECARD_RES_IOCSLOW));
 240         priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
 241                                   ecard_resource_len(ec, ECARD_RES_MEMC));
 242         if (!priv(host)->base || !priv(host)->dma) {
 243                 ret = -ENOMEM;
 244                 goto out_unmap;
 245         }
 246
 247         host->irq = ec->irq;
 248
 249         ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
 250         if (ret)
 251                 goto out_unmap;
 252
 253         NCR5380_maybe_reset_bus(host);
 254
 255         priv(host)->ctrl = 0;
 256         writeb(0, priv(host)->base + CTRL);
 257
 258         ret = request_irq(host->irq, cumanascsi_intr, 0,
 259                           "CumanaSCSI-1", host);
 260         if (ret) {
 261                 printk("scsi%d: IRQ%d not free: %d\n",
 262                     host->host_no, host->irq, ret);
 263                 goto out_exit;
 264         }
 265
 266         ret = scsi_add_host(host, &ec->dev);
 267         if (ret)
 268                 goto out_free_irq;
 269
 270         scsi_scan_host(host);
 271         goto out;
 272
 273  out_free_irq:
 274         free_irq(host->irq, host);
 275  out_exit:
 276         NCR5380_exit(host);
 277  out_unmap:
 278         iounmap(priv(host)->base);
 279         iounmap(priv(host)->dma);
 280         scsi_host_put(host);
 281  out_release:
 282         ecard_release_resources(ec);
 283  out:
 284         return ret;
 285 }
 286
 287 static void cumanascsi1_remove(struct expansion_card *ec)
 288 {
 289         struct Scsi_Host *host = ecard_get_drvdata(ec);
 290
 291         ecard_set_drvdata(ec, NULL);
 292
 293         scsi_remove_host(host);
 294         free_irq(host->irq, host);
 295         NCR5380_exit(host);
 296         iounmap(priv(host)->base);
 297         iounmap(priv(host)->dma);
 298         scsi_host_put(host);
 299         ecard_release_resources(ec);
 300 }
 301
 302 static const struct ecard_id cumanascsi1_cids[] = {
 303         { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
 304         { 0xffff, 0xffff }
 305 };
 306
 307 static struct ecard_driver cumanascsi1_driver = {
 308         .probe          = cumanascsi1_probe,
 309         .remove         = cumanascsi1_remove,
 310         .id_table       = cumanascsi1_cids,
 311         .drv = {
 312                 .name           = "cumanascsi1",
 313         },
 314 };
 315
 316 static int __init cumanascsi_init(void)
 317 {
 318         return ecard_register_driver(&cumanascsi1_driver);
 319 }
 320
 321 static void __exit cumanascsi_exit(void)
 322 {
 323         ecard_remove_driver(&cumanascsi1_driver);
 324 }
 325
 326 module_init(cumanascsi_init);
 327 module_exit(cumanascsi_exit);
 328
 329 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
 330 MODULE_LICENSE("GPL");