drivers/scsi/pcmcia/sym53c500_cs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3 *  sym53c500_cs.c       Bob Tracy (rct@frus.com)
   4 *
   5 *  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
   6 *  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
   7 *  53c500 controller: intended for use with 2.6 and later kernels.
   8 *  The pcmcia-cs add-on version of this driver is not supported
   9 *  beyond 2.4.  It consisted of three files with history/copyright
  10 *  information as follows:
  11 *
  12 *  SYM53C500.h
  13 *       Bob Tracy (rct@frus.com)
  14 *       Original by Tom Corner (tcorner@via.at).
  15 *       Adapted from NCR53c406a.h which is Copyrighted (C) 1994
  16 *       Normunds Saumanis (normunds@rx.tech.swh.lv)
  17 *
  18 *  SYM53C500.c
  19 *       Bob Tracy (rct@frus.com)
  20 *       Original driver by Tom Corner (tcorner@via.at) was adapted
  21 *       from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996
  22 *       Normunds Saumanis (normunds@fi.ibm.com)
  23 *
  24 *  sym53c500.c
  25 *       Bob Tracy (rct@frus.com)
  26 *       Original by Tom Corner (tcorner@via.at) was adapted from a
  27 *       driver for the Qlogic SCSI card written by
  28 *       David Hinds (dhinds@allegro.stanford.edu).
  29 */
  30
  31 #define SYM53C500_DEBUG 0
  32 #define VERBOSE_SYM53C500_DEBUG 0
  33
  34 /*
  35 *  Set this to 0 if you encounter kernel lockups while transferring
  36 *  data in PIO mode.  Note this can be changed via "sysfs".
  37 */
  38 #define USE_FAST_PIO 1
  39
  40 /* =============== End of user configurable parameters ============== */
  41
  42 #include <linux/module.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/errno.h>
  45 #include <linux/init.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/kernel.h>
  48 #include <linux/slab.h>
  49 #include <linux/string.h>
  50 #include <linux/ioport.h>
  51 #include <linux/blkdev.h>
  52 #include <linux/spinlock.h>
  53 #include <linux/bitops.h>
  54
  55 #include <asm/io.h>
  56 #include <asm/dma.h>
  57 #include <asm/irq.h>
  58
  59 #include <scsi/scsi_ioctl.h>
  60 #include <scsi/scsi_cmnd.h>
  61 #include <scsi/scsi_device.h>
  62 #include <scsi/scsi.h>
  63 #include <scsi/scsi_host.h>
  64
  65 #include <pcmcia/cistpl.h>
  66 #include <pcmcia/ds.h>
  67 #include <pcmcia/ciscode.h>
  68
  69
  70 /* ================================================================== */
  71
  72 #define SYNC_MODE 0             /* Synchronous transfer mode */
  73
  74 /* Default configuration */
  75 #define C1_IMG   0x07           /* ID=7 */
  76 #define C2_IMG   0x48           /* FE SCSI2 */
  77 #define C3_IMG   0x20           /* CDB */
  78 #define C4_IMG   0x04           /* ANE */
  79 #define C5_IMG   0xa4           /* ? changed from b6= AA PI SIE POL */
  80 #define C7_IMG   0x80           /* added for SYM53C500 t. corner */
  81
  82 /* Hardware Registers: offsets from io_port (base) */
  83
  84 /* Control Register Set 0 */
  85 #define TC_LSB          0x00            /* transfer counter lsb */
  86 #define TC_MSB          0x01            /* transfer counter msb */
  87 #define SCSI_FIFO       0x02            /* scsi fifo register */
  88 #define CMD_REG         0x03            /* command register */
  89 #define STAT_REG        0x04            /* status register */
  90 #define DEST_ID         0x04            /* selection/reselection bus id */
  91 #define INT_REG         0x05            /* interrupt status register */
  92 #define SRTIMOUT        0x05            /* select/reselect timeout reg */
  93 #define SEQ_REG         0x06            /* sequence step register */
  94 #define SYNCPRD         0x06            /* synchronous transfer period */
  95 #define FIFO_FLAGS      0x07            /* indicates # of bytes in fifo */
  96 #define SYNCOFF         0x07            /* synchronous offset register */
  97 #define CONFIG1         0x08            /* configuration register */
  98 #define CLKCONV         0x09            /* clock conversion register */
  99 /* #define TESTREG      0x0A */         /* test mode register */
 100 #define CONFIG2         0x0B            /* configuration 2 register */
 101 #define CONFIG3         0x0C            /* configuration 3 register */
 102 #define CONFIG4         0x0D            /* configuration 4 register */
 103 #define TC_HIGH         0x0E            /* transfer counter high */
 104 /* #define FIFO_BOTTOM  0x0F */         /* reserve FIFO byte register */
 105
 106 /* Control Register Set 1 */
 107 /* #define JUMPER_SENSE 0x00 */         /* jumper sense port reg (r/w) */
 108 /* #define SRAM_PTR     0x01 */         /* SRAM address pointer reg (r/w) */
 109 /* #define SRAM_DATA    0x02 */         /* SRAM data register (r/w) */
 110 #define PIO_FIFO        0x04            /* PIO FIFO registers (r/w) */
 111 /* #define PIO_FIFO1    0x05 */         /*  */
 112 /* #define PIO_FIFO2    0x06 */         /*  */
 113 /* #define PIO_FIFO3    0x07 */         /*  */
 114 #define PIO_STATUS      0x08            /* PIO status (r/w) */
 115 /* #define ATA_CMD      0x09 */         /* ATA command/status reg (r/w) */
 116 /* #define ATA_ERR      0x0A */         /* ATA features/error reg (r/w) */
 117 #define PIO_FLAG        0x0B            /* PIO flag interrupt enable (r/w) */
 118 #define CONFIG5         0x09            /* configuration 5 register */
 119 /* #define SIGNATURE    0x0E */         /* signature register (r) */
 120 /* #define CONFIG6      0x0F */         /* configuration 6 register (r) */
 121 #define CONFIG7         0x0d
 122
 123 /* select register set 0 */
 124 #define REG0(x)         (outb(C4_IMG, (x) + CONFIG4))
 125 /* select register set 1 */
 126 #define REG1(x)         outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
 127
 128 #if SYM53C500_DEBUG
 129 #define DEB(x) x
 130 #else
 131 #define DEB(x)
 132 #endif
 133
 134 #if VERBOSE_SYM53C500_DEBUG
 135 #define VDEB(x) x
 136 #else
 137 #define VDEB(x)
 138 #endif
 139
 140 #define LOAD_DMA_COUNT(x, count) \
 141   outb(count & 0xff, (x) + TC_LSB); \
 142   outb((count >> 8) & 0xff, (x) + TC_MSB); \
 143   outb((count >> 16) & 0xff, (x) + TC_HIGH);
 144
 145 /* Chip commands */
 146 #define DMA_OP               0x80
 147
 148 #define SCSI_NOP             0x00
 149 #define FLUSH_FIFO           0x01
 150 #define CHIP_RESET           0x02
 151 #define SCSI_RESET           0x03
 152 #define RESELECT             0x40
 153 #define SELECT_NO_ATN        0x41
 154 #define SELECT_ATN           0x42
 155 #define SELECT_ATN_STOP      0x43
 156 #define ENABLE_SEL           0x44
 157 #define DISABLE_SEL          0x45
 158 #define SELECT_ATN3          0x46
 159 #define RESELECT3            0x47
 160 #define TRANSFER_INFO        0x10
 161 #define INIT_CMD_COMPLETE    0x11
 162 #define MSG_ACCEPT           0x12
 163 #define TRANSFER_PAD         0x18
 164 #define SET_ATN              0x1a
 165 #define RESET_ATN            0x1b
 166 #define SEND_MSG             0x20
 167 #define SEND_STATUS          0x21
 168 #define SEND_DATA            0x22
 169 #define DISCONN_SEQ          0x23
 170 #define TERMINATE_SEQ        0x24
 171 #define TARG_CMD_COMPLETE    0x25
 172 #define DISCONN              0x27
 173 #define RECV_MSG             0x28
 174 #define RECV_CMD             0x29
 175 #define RECV_DATA            0x2a
 176 #define RECV_CMD_SEQ         0x2b
 177 #define TARGET_ABORT_DMA     0x04
 178
 179 /* ================================================================== */
 180
 181 struct scsi_info_t {
 182         struct pcmcia_device    *p_dev;
 183         struct Scsi_Host *host;
 184         unsigned short manf_id;
 185 };
 186
 187 /*
 188 *  Repository for per-instance host data.
 189 */
 190 struct sym53c500_data {
 191         struct scsi_cmnd *current_SC;
 192         int fast_pio;
 193 };
 194
 195 struct sym53c500_cmd_priv {
 196         int status;
 197         int message;
 198         int phase;
 199 };
 200
 201 enum Phase {
 202     idle,
 203     data_out,
 204     data_in,
 205     command_ph,
 206     status_ph,
 207     message_out,
 208     message_in
 209 };
 210
 211 /* ================================================================== */
 212
 213 static void
 214 chip_init(int io_port)
 215 {
 216         REG1(io_port);
 217         outb(0x01, io_port + PIO_STATUS);
 218         outb(0x00, io_port + PIO_FLAG);
 219
 220         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 221         outb(C3_IMG, io_port + CONFIG3);
 222         outb(C2_IMG, io_port + CONFIG2);
 223         outb(C1_IMG, io_port + CONFIG1);
 224
 225         outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
 226         outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
 227         outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
 228         outb(SYNC_MODE, io_port + SYNCOFF);     /* synchronous mode */
 229 }
 230
 231 static void
 232 SYM53C500_int_host_reset(int io_port)
 233 {
 234         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 235         outb(CHIP_RESET, io_port + CMD_REG);
 236         outb(SCSI_NOP, io_port + CMD_REG);      /* required after reset */
 237         outb(SCSI_RESET, io_port + CMD_REG);
 238         chip_init(io_port);
 239 }
 240
 241 static __inline__ int
 242 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 243 {
 244         int i;
 245         int len;        /* current scsi fifo size */
 246
 247         REG1(base);
 248         while (reqlen) {
 249                 i = inb(base + PIO_STATUS);
 250                 /* VDEB(printk("pio_status=%x\n", i)); */
 251                 if (i & 0x80)
 252                         return 0;
 253
 254                 switch (i & 0x1e) {
 255                 default:
 256                 case 0x10:      /* fifo empty */
 257                         len = 0;
 258                         break;
 259                 case 0x0:
 260                         len = 1;
 261                         break;
 262                 case 0x8:       /* fifo 1/3 full */
 263                         len = 42;
 264                         break;
 265                 case 0xc:       /* fifo 2/3 full */
 266                         len = 84;
 267                         break;
 268                 case 0xe:       /* fifo full */
 269                         len = 128;
 270                         break;
 271                 }
 272
 273                 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
 274                         return 0;
 275                 }
 276
 277                 if (len) {
 278                         if (len > reqlen)
 279                                 len = reqlen;
 280
 281                         if (fast_pio && len > 3) {
 282                                 insl(base + PIO_FIFO, request, len >> 2);
 283                                 request += len & 0xfc;
 284                                 reqlen -= len & 0xfc;
 285                         } else {
 286                                 while (len--) {
 287                                         *request++ = inb(base + PIO_FIFO);
 288                                         reqlen--;
 289                                 }
 290                         }
 291                 }
 292         }
 293         return 0;
 294 }
 295
 296 static __inline__ int
 297 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 298 {
 299         int i = 0;
 300         int len;        /* current scsi fifo size */
 301
 302         REG1(base);
 303         while (reqlen && !(i & 0x40)) {
 304                 i = inb(base + PIO_STATUS);
 305                 /* VDEB(printk("pio_status=%x\n", i)); */
 306                 if (i & 0x80)   /* error */
 307                         return 0;
 308
 309                 switch (i & 0x1e) {
 310                 case 0x10:
 311                         len = 128;
 312                         break;
 313                 case 0x0:
 314                         len = 84;
 315                         break;
 316                 case 0x8:
 317                         len = 42;
 318                         break;
 319                 case 0xc:
 320                         len = 1;
 321                         break;
 322                 default:
 323                 case 0xe:
 324                         len = 0;
 325                         break;
 326                 }
 327
 328                 if (len) {
 329                         if (len > reqlen)
 330                                 len = reqlen;
 331
 332                         if (fast_pio && len > 3) {
 333                                 outsl(base + PIO_FIFO, request, len >> 2);
 334                                 request += len & 0xfc;
 335                                 reqlen -= len & 0xfc;
 336                         } else {
 337                                 while (len--) {
 338                                         outb(*request++, base + PIO_FIFO);
 339                                         reqlen--;
 340                                 }
 341                         }
 342                 }
 343         }
 344         return 0;
 345 }
 346
 347 static irqreturn_t
 348 SYM53C500_intr(int irq, void *dev_id)
 349 {
 350         unsigned long flags;
 351         struct Scsi_Host *dev = dev_id;
 352         DEB(unsigned char fifo_size;)
 353         DEB(unsigned char seq_reg;)
 354         unsigned char status, int_reg;
 355         unsigned char pio_status;
 356         int port_base = dev->io_port;
 357         struct sym53c500_data *data =
 358             (struct sym53c500_data *)dev->hostdata;
 359         struct scsi_cmnd *curSC = data->current_SC;
 360         struct sym53c500_cmd_priv *scp = scsi_cmd_priv(curSC);
 361         int fast_pio = data->fast_pio;
 362
 363         spin_lock_irqsave(dev->host_lock, flags);
 364
 365         VDEB(printk("SYM53C500_intr called\n"));
 366
 367         REG1(port_base);
 368         pio_status = inb(port_base + PIO_STATUS);
 369         REG0(port_base);
 370         status = inb(port_base + STAT_REG);
 371         DEB(seq_reg = inb(port_base + SEQ_REG));
 372         int_reg = inb(port_base + INT_REG);
 373         DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
 374
 375 #if SYM53C500_DEBUG
 376         printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x",
 377             status, seq_reg, int_reg, fifo_size);
 378         printk(", pio=%02x\n", pio_status);
 379 #endif /* SYM53C500_DEBUG */
 380
 381         if (int_reg & 0x80) {   /* SCSI reset intr */
 382                 DEB(printk("SYM53C500: reset intr received\n"));
 383                 curSC->result = DID_RESET << 16;
 384                 goto idle_out;
 385         }
 386
 387         if (pio_status & 0x80) {
 388                 printk("SYM53C500: Warning: PIO error!\n");
 389                 curSC->result = DID_ERROR << 16;
 390                 goto idle_out;
 391         }
 392
 393         if (status & 0x20) {            /* Parity error */
 394                 printk("SYM53C500: Warning: parity error!\n");
 395                 curSC->result = DID_PARITY << 16;
 396                 goto idle_out;
 397         }
 398
 399         if (status & 0x40) {            /* Gross error */
 400                 printk("SYM53C500: Warning: gross error!\n");
 401                 curSC->result = DID_ERROR << 16;
 402                 goto idle_out;
 403         }
 404
 405         if (int_reg & 0x20) {           /* Disconnect */
 406                 DEB(printk("SYM53C500: disconnect intr received\n"));
 407                 if (scp->phase != message_in) { /* Unexpected disconnect */
 408                         curSC->result = DID_NO_CONNECT << 16;
 409                 } else {        /* Command complete, return status and message */
 410                         curSC->result = (scp->status & 0xff) |
 411                                 ((scp->message & 0xff) << 8) | (DID_OK << 16);
 412                 }
 413                 goto idle_out;
 414         }
 415
 416         switch (status & 0x07) {        /* scsi phase */
 417         case 0x00:                      /* DATA-OUT */
 418                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 419                         struct scatterlist *sg;
 420                         int i;
 421
 422                         scp->phase = data_out;
 423                         VDEB(printk("SYM53C500: Data-Out phase\n"));
 424                         outb(FLUSH_FIFO, port_base + CMD_REG);
 425                         LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
 426                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 427
 428                         scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
 429                                 SYM53C500_pio_write(fast_pio, port_base,
 430                                     sg_virt(sg), sg->length);
 431                         }
 432                         REG0(port_base);
 433                 }
 434                 break;
 435
 436         case 0x01:              /* DATA-IN */
 437                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 438                         struct scatterlist *sg;
 439                         int i;
 440
 441                         scp->phase = data_in;
 442                         VDEB(printk("SYM53C500: Data-In phase\n"));
 443                         outb(FLUSH_FIFO, port_base + CMD_REG);
 444                         LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
 445                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 446
 447                         scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
 448                                 SYM53C500_pio_read(fast_pio, port_base,
 449                                         sg_virt(sg), sg->length);
 450                         }
 451                         REG0(port_base);
 452                 }
 453                 break;
 454
 455         case 0x02:              /* COMMAND */
 456                 scp->phase = command_ph;
 457                 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
 458                 break;
 459
 460         case 0x03:              /* STATUS */
 461                 scp->phase = status_ph;
 462                 VDEB(printk("SYM53C500: Status phase\n"));
 463                 outb(FLUSH_FIFO, port_base + CMD_REG);
 464                 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
 465                 break;
 466
 467         case 0x04:              /* Reserved */
 468         case 0x05:              /* Reserved */
 469                 printk("SYM53C500: WARNING: Reserved phase!!!\n");
 470                 break;
 471
 472         case 0x06:              /* MESSAGE-OUT */
 473                 DEB(printk("SYM53C500: Message-Out phase\n"));
 474                 scp->phase = message_out;
 475                 outb(SET_ATN, port_base + CMD_REG);     /* Reject the message */
 476                 outb(MSG_ACCEPT, port_base + CMD_REG);
 477                 break;
 478
 479         case 0x07:              /* MESSAGE-IN */
 480                 VDEB(printk("SYM53C500: Message-In phase\n"));
 481                 scp->phase = message_in;
 482
 483                 scp->status = inb(port_base + SCSI_FIFO);
 484                 scp->message = inb(port_base + SCSI_FIFO);
 485
 486                 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
 487                 DEB(printk("Status = %02x  Message = %02x\n", scp->status, scp->message));
 488
 489                 if (scp->message == SAVE_POINTERS || scp->message == DISCONNECT) {
 490                         outb(SET_ATN, port_base + CMD_REG);     /* Reject message */
 491                         DEB(printk("Discarding SAVE_POINTERS message\n"));
 492                 }
 493                 outb(MSG_ACCEPT, port_base + CMD_REG);
 494                 break;
 495         }
 496 out:
 497         spin_unlock_irqrestore(dev->host_lock, flags);
 498         return IRQ_HANDLED;
 499
 500 idle_out:
 501         scp->phase = idle;
 502         scsi_done(curSC);
 503         goto out;
 504 }
 505
 506 static void
 507 SYM53C500_release(struct pcmcia_device *link)
 508 {
 509         struct scsi_info_t *info = link->priv;
 510         struct Scsi_Host *shost = info->host;
 511
 512         dev_dbg(&link->dev, "SYM53C500_release\n");
 513
 514         /*
 515         *  Do this before releasing/freeing resources.
 516         */
 517         scsi_remove_host(shost);
 518
 519         /*
 520         *  Interrupts getting hosed on card removal.  Try
 521         *  the following code, mostly from qlogicfas.c.
 522         */
 523         if (shost->irq)
 524                 free_irq(shost->irq, shost);
 525         if (shost->io_port && shost->n_io_port)
 526                 release_region(shost->io_port, shost->n_io_port);
 527
 528         pcmcia_disable_device(link);
 529
 530         scsi_host_put(shost);
 531 } /* SYM53C500_release */
 532
 533 static const char*
 534 SYM53C500_info(struct Scsi_Host *SChost)
 535 {
 536         static char info_msg[256];
 537         struct sym53c500_data *data =
 538             (struct sym53c500_data *)SChost->hostdata;
 539
 540         DEB(printk("SYM53C500_info called\n"));
 541         (void)snprintf(info_msg, sizeof(info_msg),
 542             "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.",
 543             SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
 544         return (info_msg);
 545 }
 546
 547 static int SYM53C500_queue_lck(struct scsi_cmnd *SCpnt)
 548 {
 549         struct sym53c500_cmd_priv *scp = scsi_cmd_priv(SCpnt);
 550         int i;
 551         int port_base = SCpnt->device->host->io_port;
 552         struct sym53c500_data *data =
 553             (struct sym53c500_data *)SCpnt->device->host->hostdata;
 554
 555         VDEB(printk("SYM53C500_queue called\n"));
 556
 557         DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n",
 558             SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id,
 559                    (u8)SCpnt->device->lun,  scsi_bufflen(SCpnt)));
 560
 561         VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
 562             printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
 563         VDEB(printk("\n"));
 564
 565         data->current_SC = SCpnt;
 566         scp->phase = command_ph;
 567         scp->status = 0;
 568         scp->message = 0;
 569
 570         /* We are locked here already by the mid layer */
 571         REG0(port_base);
 572         outb(scmd_id(SCpnt), port_base + DEST_ID);      /* set destination */
 573         outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
 574
 575         for (i = 0; i < SCpnt->cmd_len; i++) {
 576                 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
 577         }
 578         outb(SELECT_NO_ATN, port_base + CMD_REG);
 579
 580         return 0;
 581 }
 582
 583 static DEF_SCSI_QCMD(SYM53C500_queue)
 584
 585 static int
 586 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
 587 {
 588         int port_base = SCpnt->device->host->io_port;
 589
 590         DEB(printk("SYM53C500_host_reset called\n"));
 591         spin_lock_irq(SCpnt->device->host->host_lock);
 592         SYM53C500_int_host_reset(port_base);
 593         spin_unlock_irq(SCpnt->device->host->host_lock);
 594
 595         return SUCCESS;
 596 }
 597
 598 static int
 599 SYM53C500_biosparm(struct scsi_device *disk,
 600     struct block_device *dev,
 601     sector_t capacity, int *info_array)
 602 {
 603         int size;
 604
 605         DEB(printk("SYM53C500_biosparm called\n"));
 606
 607         size = capacity;
 608         info_array[0] = 64;             /* heads */
 609         info_array[1] = 32;             /* sectors */
 610         info_array[2] = size >> 11;     /* cylinders */
 611         if (info_array[2] > 1024) {     /* big disk */
 612                 info_array[0] = 255;
 613                 info_array[1] = 63;
 614                 info_array[2] = size / (255 * 63);
 615         }
 616         return 0;
 617 }
 618
 619 static ssize_t
 620 SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
 621                    char *buf)
 622 {
 623         struct Scsi_Host *SHp = class_to_shost(dev);
 624         struct sym53c500_data *data =
 625             (struct sym53c500_data *)SHp->hostdata;
 626
 627         return snprintf(buf, 4, "%d\n", data->fast_pio);
 628 }
 629
 630 static ssize_t
 631 SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
 632                     const char *buf, size_t count)
 633 {
 634         int pio;
 635         struct Scsi_Host *SHp = class_to_shost(dev);
 636         struct sym53c500_data *data =
 637             (struct sym53c500_data *)SHp->hostdata;
 638
 639         pio = simple_strtoul(buf, NULL, 0);
 640         if (pio == 0 || pio == 1) {
 641                 data->fast_pio = pio;
 642                 return count;
 643         }
 644         else
 645                 return -EINVAL;
 646 }
 647
 648 /*
 649 *  SCSI HBA device attributes we want to
 650 *  make available via sysfs.
 651 */
 652 static struct device_attribute SYM53C500_pio_attr = {
 653         .attr = {
 654                 .name = "fast_pio",
 655                 .mode = (S_IRUGO | S_IWUSR),
 656         },
 657         .show = SYM53C500_show_pio,
 658         .store = SYM53C500_store_pio,
 659 };
 660
 661 static struct attribute *SYM53C500_shost_attrs[] = {
 662         &SYM53C500_pio_attr.attr,
 663         NULL,
 664 };
 665
 666 ATTRIBUTE_GROUPS(SYM53C500_shost);
 667
 668 /*
 669 *  scsi_host_template initializer
 670 */
 671 static const struct scsi_host_template sym53c500_driver_template = {
 672      .module                    = THIS_MODULE,
 673      .name                      = "SYM53C500",
 674      .info                      = SYM53C500_info,
 675      .queuecommand              = SYM53C500_queue,
 676      .eh_host_reset_handler     = SYM53C500_host_reset,
 677      .bios_param                = SYM53C500_biosparm,
 678      .proc_name                 = "SYM53C500",
 679      .can_queue                 = 1,
 680      .this_id                   = 7,
 681      .sg_tablesize              = 32,
 682      .shost_groups              = SYM53C500_shost_groups,
 683      .cmd_size                  = sizeof(struct sym53c500_cmd_priv),
 684 };
 685
 686 static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
 687 {
 688         p_dev->io_lines = 10;
 689         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 690         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 691
 692         if (p_dev->resource[0]->start == 0)
 693                 return -ENODEV;
 694
 695         return pcmcia_request_io(p_dev);
 696 }
 697
 698 static int
 699 SYM53C500_config(struct pcmcia_device *link)
 700 {
 701         struct scsi_info_t *info = link->priv;
 702         int ret;
 703         int irq_level, port_base;
 704         struct Scsi_Host *host;
 705         const struct scsi_host_template *tpnt = &sym53c500_driver_template;
 706         struct sym53c500_data *data;
 707
 708         dev_dbg(&link->dev, "SYM53C500_config\n");
 709
 710         info->manf_id = link->manf_id;
 711
 712         ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
 713         if (ret)
 714                 goto failed;
 715
 716         if (!link->irq)
 717                 goto failed;
 718
 719         ret = pcmcia_enable_device(link);
 720         if (ret)
 721                 goto failed;
 722
 723         /*
 724         *  That's the trouble with copying liberally from another driver.
 725         *  Some things probably aren't relevant, and I suspect this entire
 726         *  section dealing with manufacturer IDs can be scrapped.       --rct
 727         */
 728         if ((info->manf_id == MANFID_MACNICA) ||
 729             (info->manf_id == MANFID_PIONEER) ||
 730             (info->manf_id == 0x0098)) {
 731                 /* set ATAcmd */
 732                 outb(0xb4, link->resource[0]->start + 0xd);
 733                 outb(0x24, link->resource[0]->start + 0x9);
 734                 outb(0x04, link->resource[0]->start + 0xd);
 735         }
 736
 737         /*
 738         *  irq_level == 0 implies tpnt->can_queue == 0, which
 739         *  is not supported in 2.6.  Thus, only irq_level > 0
 740         *  will be allowed.
 741         *
 742         *  Possible port_base values are as follows:
 743         *
 744         *       0x130, 0x230, 0x280, 0x290,
 745         *       0x320, 0x330, 0x340, 0x350
 746         */
 747         port_base = link->resource[0]->start;
 748         irq_level = link->irq;
 749
 750         DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
 751             port_base, irq_level, USE_FAST_PIO);)
 752
 753         chip_init(port_base);
 754
 755         host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
 756         if (!host) {
 757                 printk("SYM53C500: Unable to register host, giving up.\n");
 758                 goto err_release;
 759         }
 760
 761         data = (struct sym53c500_data *)host->hostdata;
 762
 763         if (irq_level > 0) {
 764                 if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
 765                         printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
 766                         goto err_free_scsi;
 767                 }
 768                 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
 769         } else if (irq_level == 0) {
 770                 DEB(printk("SYM53C500: No interrupts detected\n"));
 771                 goto err_free_scsi;
 772         } else {
 773                 DEB(printk("SYM53C500: Shouldn't get here!\n"));
 774                 goto err_free_scsi;
 775         }
 776
 777         host->unique_id = port_base;
 778         host->irq = irq_level;
 779         host->io_port = port_base;
 780         host->n_io_port = 0x10;
 781         host->dma_channel = -1;
 782
 783         /*
 784         *  Note fast_pio is set to USE_FAST_PIO by
 785         *  default, but can be changed via "sysfs".
 786         */
 787         data->fast_pio = USE_FAST_PIO;
 788
 789         info->host = host;
 790
 791         if (scsi_add_host(host, NULL))
 792                 goto err_free_irq;
 793
 794         scsi_scan_host(host);
 795
 796         return 0;
 797
 798 err_free_irq:
 799         free_irq(irq_level, host);
 800 err_free_scsi:
 801         scsi_host_put(host);
 802 err_release:
 803         release_region(port_base, 0x10);
 804         printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
 805         return -ENODEV;
 806
 807 failed:
 808         SYM53C500_release(link);
 809         return -ENODEV;
 810 } /* SYM53C500_config */
 811
 812 static int sym53c500_resume(struct pcmcia_device *link)
 813 {
 814         struct scsi_info_t *info = link->priv;
 815
 816         /* See earlier comment about manufacturer IDs. */
 817         if ((info->manf_id == MANFID_MACNICA) ||
 818             (info->manf_id == MANFID_PIONEER) ||
 819             (info->manf_id == 0x0098)) {
 820                 outb(0x80, link->resource[0]->start + 0xd);
 821                 outb(0x24, link->resource[0]->start + 0x9);
 822                 outb(0x04, link->resource[0]->start + 0xd);
 823         }
 824         /*
 825          *  If things don't work after a "resume",
 826          *  this is a good place to start looking.
 827          */
 828         SYM53C500_int_host_reset(link->resource[0]->start);
 829
 830         return 0;
 831 }
 832
 833 static void
 834 SYM53C500_detach(struct pcmcia_device *link)
 835 {
 836         dev_dbg(&link->dev, "SYM53C500_detach\n");
 837
 838         SYM53C500_release(link);
 839
 840         kfree(link->priv);
 841         link->priv = NULL;
 842 } /* SYM53C500_detach */
 843
 844 static int
 845 SYM53C500_probe(struct pcmcia_device *link)
 846 {
 847         struct scsi_info_t *info;
 848
 849         dev_dbg(&link->dev, "SYM53C500_attach()\n");
 850
 851         /* Create new SCSI device */
 852         info = kzalloc(sizeof(*info), GFP_KERNEL);
 853         if (!info)
 854                 return -ENOMEM;
 855         info->p_dev = link;
 856         link->priv = info;
 857         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 858
 859         return SYM53C500_config(link);
 860 } /* SYM53C500_attach */
 861
 862 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
 863 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
 864 MODULE_LICENSE("GPL");
 865
 866 static const struct pcmcia_device_id sym53c500_ids[] = {
 867         PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
 868         PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
 869         PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
 870         PCMCIA_DEVICE_NULL,
 871 };
 872 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
 873
 874 static struct pcmcia_driver sym53c500_cs_driver = {
 875         .owner          = THIS_MODULE,
 876         .name           = "sym53c500_cs",
 877         .probe          = SYM53C500_probe,
 878         .remove         = SYM53C500_detach,
 879         .id_table       = sym53c500_ids,
 880         .resume         = sym53c500_resume,
 881 };
 882 module_pcmcia_driver(sym53c500_cs_driver);