git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/pcmcia/sym53c500_cs.c

   1 /*
   2 *  sym53c500_cs.c       Bob Tracy (rct@frus.com)
   3 *
   4 *  A rewrite of the pcmcia-cs add-on driver for newer (circa 1997)
   5 *  New Media Bus Toaster PCMCIA SCSI cards using the Symbios Logic
   6 *  53c500 controller: intended for use with 2.6 and later kernels.
   7 *  The pcmcia-cs add-on version of this driver is not supported
   8 *  beyond 2.4.  It consisted of three files with history/copyright
   9 *  information as follows:
  10 *
  11 *  SYM53C500.h
  12 *       Bob Tracy (rct@frus.com)
  13 *       Original by Tom Corner (tcorner@via.at).
  14 *       Adapted from NCR53c406a.h which is Copyrighted (C) 1994
  15 *       Normunds Saumanis (normunds@rx.tech.swh.lv)
  16 *
  17 *  SYM53C500.c
  18 *       Bob Tracy (rct@frus.com)
  19 *       Original driver by Tom Corner (tcorner@via.at) was adapted
  20 *       from NCR53c406a.c which is Copyrighted (C) 1994, 1995, 1996
  21 *       Normunds Saumanis (normunds@fi.ibm.com)
  22 *
  23 *  sym53c500.c
  24 *       Bob Tracy (rct@frus.com)
  25 *       Original by Tom Corner (tcorner@via.at) was adapted from a
  26 *       driver for the Qlogic SCSI card written by
  27 *       David Hinds (dhinds@allegro.stanford.edu).
  28 *
  29 *  This program is free software; you can redistribute it and/or modify it
  30 *  under the terms of the GNU General Public License as published by the
  31 *  Free Software Foundation; either version 2, or (at your option) any
  32 *  later version.
  33 *
  34 *  This program is distributed in the hope that it will be useful, but
  35 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  36 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  37 *  General Public License for more details.
  38 */
  39
  40 #define SYM53C500_DEBUG 0
  41 #define VERBOSE_SYM53C500_DEBUG 0
  42
  43 /*
  44 *  Set this to 0 if you encounter kernel lockups while transferring
  45 *  data in PIO mode.  Note this can be changed via "sysfs".
  46 */
  47 #define USE_FAST_PIO 1
  48
  49 /* =============== End of user configurable parameters ============== */
  50
  51 #include <linux/module.h>
  52 #include <linux/moduleparam.h>
  53 #include <linux/errno.h>
  54 #include <linux/init.h>
  55 #include <linux/interrupt.h>
  56 #include <linux/kernel.h>
  57 #include <linux/sched.h>
  58 #include <linux/slab.h>
  59 #include <linux/string.h>
  60 #include <linux/ioport.h>
  61 #include <linux/blkdev.h>
  62 #include <linux/spinlock.h>
  63 #include <linux/bitops.h>
  64
  65 #include <asm/io.h>
  66 #include <asm/dma.h>
  67 #include <asm/irq.h>
  68
  69 #include <scsi/scsi_ioctl.h>
  70 #include <scsi/scsi_cmnd.h>
  71 #include <scsi/scsi_device.h>
  72 #include <scsi/scsi.h>
  73 #include <scsi/scsi_host.h>
  74
  75 #include <pcmcia/cs_types.h>
  76 #include <pcmcia/cs.h>
  77 #include <pcmcia/cistpl.h>
  78 #include <pcmcia/ds.h>
  79 #include <pcmcia/ciscode.h>
  80
  81 /* ================================================================== */
  82
  83 #ifdef PCMCIA_DEBUG
  84 static int pc_debug = PCMCIA_DEBUG;
  85 module_param(pc_debug, int, 0);
  86 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
  87 static char *version =
  88 "sym53c500_cs.c 0.9c 2004/10/27 (Bob Tracy)";
  89 #else
  90 #define DEBUG(n, args...)
  91 #endif
  92
  93 /* ================================================================== */
  94
  95 #define SYNC_MODE 0             /* Synchronous transfer mode */
  96
  97 /* Default configuration */
  98 #define C1_IMG   0x07           /* ID=7 */
  99 #define C2_IMG   0x48           /* FE SCSI2 */
 100 #define C3_IMG   0x20           /* CDB */
 101 #define C4_IMG   0x04           /* ANE */
 102 #define C5_IMG   0xa4           /* ? changed from b6= AA PI SIE POL */
 103 #define C7_IMG   0x80           /* added for SYM53C500 t. corner */
 104
 105 /* Hardware Registers: offsets from io_port (base) */
 106
 107 /* Control Register Set 0 */
 108 #define TC_LSB          0x00            /* transfer counter lsb */
 109 #define TC_MSB          0x01            /* transfer counter msb */
 110 #define SCSI_FIFO       0x02            /* scsi fifo register */
 111 #define CMD_REG         0x03            /* command register */
 112 #define STAT_REG        0x04            /* status register */
 113 #define DEST_ID         0x04            /* selection/reselection bus id */
 114 #define INT_REG         0x05            /* interrupt status register */
 115 #define SRTIMOUT        0x05            /* select/reselect timeout reg */
 116 #define SEQ_REG         0x06            /* sequence step register */
 117 #define SYNCPRD         0x06            /* synchronous transfer period */
 118 #define FIFO_FLAGS      0x07            /* indicates # of bytes in fifo */
 119 #define SYNCOFF         0x07            /* synchronous offset register */
 120 #define CONFIG1         0x08            /* configuration register */
 121 #define CLKCONV         0x09            /* clock conversion register */
 122 /* #define TESTREG      0x0A */         /* test mode register */
 123 #define CONFIG2         0x0B            /* configuration 2 register */
 124 #define CONFIG3         0x0C            /* configuration 3 register */
 125 #define CONFIG4         0x0D            /* configuration 4 register */
 126 #define TC_HIGH         0x0E            /* transfer counter high */
 127 /* #define FIFO_BOTTOM  0x0F */         /* reserve FIFO byte register */
 128
 129 /* Control Register Set 1 */
 130 /* #define JUMPER_SENSE 0x00 */         /* jumper sense port reg (r/w) */
 131 /* #define SRAM_PTR     0x01 */         /* SRAM address pointer reg (r/w) */
 132 /* #define SRAM_DATA    0x02 */         /* SRAM data register (r/w) */
 133 #define PIO_FIFO        0x04            /* PIO FIFO registers (r/w) */
 134 /* #define PIO_FIFO1    0x05 */         /*  */
 135 /* #define PIO_FIFO2    0x06 */         /*  */
 136 /* #define PIO_FIFO3    0x07 */         /*  */
 137 #define PIO_STATUS      0x08            /* PIO status (r/w) */
 138 /* #define ATA_CMD      0x09 */         /* ATA command/status reg (r/w) */
 139 /* #define ATA_ERR      0x0A */         /* ATA features/error reg (r/w) */
 140 #define PIO_FLAG        0x0B            /* PIO flag interrupt enable (r/w) */
 141 #define CONFIG5         0x09            /* configuration 5 register */
 142 /* #define SIGNATURE    0x0E */         /* signature register (r) */
 143 /* #define CONFIG6      0x0F */         /* configuration 6 register (r) */
 144 #define CONFIG7         0x0d
 145
 146 /* select register set 0 */
 147 #define REG0(x)         (outb(C4_IMG, (x) + CONFIG4))
 148 /* select register set 1 */
 149 #define REG1(x)         outb(C7_IMG, (x) + CONFIG7); outb(C5_IMG, (x) + CONFIG5)
 150
 151 #if SYM53C500_DEBUG
 152 #define DEB(x) x
 153 #else
 154 #define DEB(x)
 155 #endif
 156
 157 #if VERBOSE_SYM53C500_DEBUG
 158 #define VDEB(x) x
 159 #else
 160 #define VDEB(x)
 161 #endif
 162
 163 #define LOAD_DMA_COUNT(x, count) \
 164   outb(count & 0xff, (x) + TC_LSB); \
 165   outb((count >> 8) & 0xff, (x) + TC_MSB); \
 166   outb((count >> 16) & 0xff, (x) + TC_HIGH);
 167
 168 /* Chip commands */
 169 #define DMA_OP               0x80
 170
 171 #define SCSI_NOP             0x00
 172 #define FLUSH_FIFO           0x01
 173 #define CHIP_RESET           0x02
 174 #define SCSI_RESET           0x03
 175 #define RESELECT             0x40
 176 #define SELECT_NO_ATN        0x41
 177 #define SELECT_ATN           0x42
 178 #define SELECT_ATN_STOP      0x43
 179 #define ENABLE_SEL           0x44
 180 #define DISABLE_SEL          0x45
 181 #define SELECT_ATN3          0x46
 182 #define RESELECT3            0x47
 183 #define TRANSFER_INFO        0x10
 184 #define INIT_CMD_COMPLETE    0x11
 185 #define MSG_ACCEPT           0x12
 186 #define TRANSFER_PAD         0x18
 187 #define SET_ATN              0x1a
 188 #define RESET_ATN            0x1b
 189 #define SEND_MSG             0x20
 190 #define SEND_STATUS          0x21
 191 #define SEND_DATA            0x22
 192 #define DISCONN_SEQ          0x23
 193 #define TERMINATE_SEQ        0x24
 194 #define TARG_CMD_COMPLETE    0x25
 195 #define DISCONN              0x27
 196 #define RECV_MSG             0x28
 197 #define RECV_CMD             0x29
 198 #define RECV_DATA            0x2a
 199 #define RECV_CMD_SEQ         0x2b
 200 #define TARGET_ABORT_DMA     0x04
 201
 202 /* ================================================================== */
 203
 204 struct scsi_info_t {
 205         dev_link_t link;
 206         dev_node_t node;
 207         struct Scsi_Host *host;
 208         unsigned short manf_id;
 209 };
 210
 211 /*
 212 *  Repository for per-instance host data.
 213 */
 214 struct sym53c500_data {
 215         struct scsi_cmnd *current_SC;
 216         int fast_pio;
 217 };
 218
 219 enum Phase {
 220     idle,
 221     data_out,
 222     data_in,
 223     command_ph,
 224     status_ph,
 225     message_out,
 226     message_in
 227 };
 228
 229 /* ================================================================== */
 230
 231 /*
 232 *  Global (within this module) variables other than
 233 *  sym53c500_driver_template (the scsi_host_template).
 234 */
 235 static dev_link_t *dev_list;
 236 static dev_info_t dev_info = "sym53c500_cs";
 237
 238 /* ================================================================== */
 239
 240 static void
 241 chip_init(int io_port)
 242 {
 243         REG1(io_port);
 244         outb(0x01, io_port + PIO_STATUS);
 245         outb(0x00, io_port + PIO_FLAG);
 246
 247         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 248         outb(C3_IMG, io_port + CONFIG3);
 249         outb(C2_IMG, io_port + CONFIG2);
 250         outb(C1_IMG, io_port + CONFIG1);
 251
 252         outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
 253         outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
 254         outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
 255         outb(SYNC_MODE, io_port + SYNCOFF);     /* synchronous mode */
 256 }
 257
 258 static void
 259 SYM53C500_int_host_reset(int io_port)
 260 {
 261         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 262         outb(CHIP_RESET, io_port + CMD_REG);
 263         outb(SCSI_NOP, io_port + CMD_REG);      /* required after reset */
 264         outb(SCSI_RESET, io_port + CMD_REG);
 265         chip_init(io_port);
 266 }
 267
 268 static __inline__ int
 269 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 270 {
 271         int i;
 272         int len;        /* current scsi fifo size */
 273
 274         REG1(base);
 275         while (reqlen) {
 276                 i = inb(base + PIO_STATUS);
 277                 /* VDEB(printk("pio_status=%x\n", i)); */
 278                 if (i & 0x80)
 279                         return 0;
 280
 281                 switch (i & 0x1e) {
 282                 default:
 283                 case 0x10:      /* fifo empty */
 284                         len = 0;
 285                         break;
 286                 case 0x0:
 287                         len = 1;
 288                         break;
 289                 case 0x8:       /* fifo 1/3 full */
 290                         len = 42;
 291                         break;
 292                 case 0xc:       /* fifo 2/3 full */
 293                         len = 84;
 294                         break;
 295                 case 0xe:       /* fifo full */
 296                         len = 128;
 297                         break;
 298                 }
 299
 300                 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
 301                         return 0;
 302                 }
 303
 304                 if (len) {
 305                         if (len > reqlen)
 306                                 len = reqlen;
 307
 308                         if (fast_pio && len > 3) {
 309                                 insl(base + PIO_FIFO, request, len >> 2);
 310                                 request += len & 0xfc;
 311                                 reqlen -= len & 0xfc;
 312                         } else {
 313                                 while (len--) {
 314                                         *request++ = inb(base + PIO_FIFO);
 315                                         reqlen--;
 316                                 }
 317                         }
 318                 }
 319         }
 320         return 0;
 321 }
 322
 323 static __inline__ int
 324 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 325 {
 326         int i = 0;
 327         int len;        /* current scsi fifo size */
 328
 329         REG1(base);
 330         while (reqlen && !(i & 0x40)) {
 331                 i = inb(base + PIO_STATUS);
 332                 /* VDEB(printk("pio_status=%x\n", i)); */
 333                 if (i & 0x80)   /* error */
 334                         return 0;
 335
 336                 switch (i & 0x1e) {
 337                 case 0x10:
 338                         len = 128;
 339                         break;
 340                 case 0x0:
 341                         len = 84;
 342                         break;
 343                 case 0x8:
 344                         len = 42;
 345                         break;
 346                 case 0xc:
 347                         len = 1;
 348                         break;
 349                 default:
 350                 case 0xe:
 351                         len = 0;
 352                         break;
 353                 }
 354
 355                 if (len) {
 356                         if (len > reqlen)
 357                                 len = reqlen;
 358
 359                         if (fast_pio && len > 3) {
 360                                 outsl(base + PIO_FIFO, request, len >> 2);
 361                                 request += len & 0xfc;
 362                                 reqlen -= len & 0xfc;
 363                         } else {
 364                                 while (len--) {
 365                                         outb(*request++, base + PIO_FIFO);
 366                                         reqlen--;
 367                                 }
 368                         }
 369                 }
 370         }
 371         return 0;
 372 }
 373
 374 static irqreturn_t
 375 SYM53C500_intr(int irq, void *dev_id, struct pt_regs *regs)
 376 {
 377         unsigned long flags;
 378         struct Scsi_Host *dev = dev_id;
 379         DEB(unsigned char fifo_size;)
 380         DEB(unsigned char seq_reg;)
 381         unsigned char status, int_reg;
 382         unsigned char pio_status;
 383         struct scatterlist *sglist;
 384         unsigned int sgcount;
 385         int port_base = dev->io_port;
 386         struct sym53c500_data *data =
 387             (struct sym53c500_data *)dev->hostdata;
 388         struct scsi_cmnd *curSC = data->current_SC;
 389         int fast_pio = data->fast_pio;
 390
 391         spin_lock_irqsave(dev->host_lock, flags);
 392
 393         VDEB(printk("SYM53C500_intr called\n"));
 394
 395         REG1(port_base);
 396         pio_status = inb(port_base + PIO_STATUS);
 397         REG0(port_base);
 398         status = inb(port_base + STAT_REG);
 399         DEB(seq_reg = inb(port_base + SEQ_REG));
 400         int_reg = inb(port_base + INT_REG);
 401         DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
 402
 403 #if SYM53C500_DEBUG
 404         printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x",
 405             status, seq_reg, int_reg, fifo_size);
 406         printk(", pio=%02x\n", pio_status);
 407 #endif /* SYM53C500_DEBUG */
 408
 409         if (int_reg & 0x80) {   /* SCSI reset intr */
 410                 DEB(printk("SYM53C500: reset intr received\n"));
 411                 curSC->result = DID_RESET << 16;
 412                 goto idle_out;
 413         }
 414
 415         if (pio_status & 0x80) {
 416                 printk("SYM53C500: Warning: PIO error!\n");
 417                 curSC->result = DID_ERROR << 16;
 418                 goto idle_out;
 419         }
 420
 421         if (status & 0x20) {            /* Parity error */
 422                 printk("SYM53C500: Warning: parity error!\n");
 423                 curSC->result = DID_PARITY << 16;
 424                 goto idle_out;
 425         }
 426
 427         if (status & 0x40) {            /* Gross error */
 428                 printk("SYM53C500: Warning: gross error!\n");
 429                 curSC->result = DID_ERROR << 16;
 430                 goto idle_out;
 431         }
 432
 433         if (int_reg & 0x20) {           /* Disconnect */
 434                 DEB(printk("SYM53C500: disconnect intr received\n"));
 435                 if (curSC->SCp.phase != message_in) {   /* Unexpected disconnect */
 436                         curSC->result = DID_NO_CONNECT << 16;
 437                 } else {        /* Command complete, return status and message */
 438                         curSC->result = (curSC->SCp.Status & 0xff)
 439                             | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
 440                 }
 441                 goto idle_out;
 442         }
 443
 444         switch (status & 0x07) {        /* scsi phase */
 445         case 0x00:                      /* DATA-OUT */
 446                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 447                         curSC->SCp.phase = data_out;
 448                         VDEB(printk("SYM53C500: Data-Out phase\n"));
 449                         outb(FLUSH_FIFO, port_base + CMD_REG);
 450                         LOAD_DMA_COUNT(port_base, curSC->request_bufflen);      /* Max transfer size */
 451                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 452                         if (!curSC->use_sg)     /* Don't use scatter-gather */
 453                                 SYM53C500_pio_write(fast_pio, port_base, curSC->request_buffer, curSC->request_bufflen);
 454                         else {  /* use scatter-gather */
 455                                 sgcount = curSC->use_sg;
 456                                 sglist = curSC->request_buffer;
 457                                 while (sgcount--) {
 458                                         SYM53C500_pio_write(fast_pio, port_base, page_address(sglist->page) + sglist->offset, sglist->length);
 459                                         sglist++;
 460                                 }
 461                         }
 462                         REG0(port_base);
 463                 }
 464                 break;
 465
 466         case 0x01:              /* DATA-IN */
 467                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 468                         curSC->SCp.phase = data_in;
 469                         VDEB(printk("SYM53C500: Data-In phase\n"));
 470                         outb(FLUSH_FIFO, port_base + CMD_REG);
 471                         LOAD_DMA_COUNT(port_base, curSC->request_bufflen);      /* Max transfer size */
 472                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 473                         if (!curSC->use_sg)     /* Don't use scatter-gather */
 474                                 SYM53C500_pio_read(fast_pio, port_base, curSC->request_buffer, curSC->request_bufflen);
 475                         else {  /* Use scatter-gather */
 476                                 sgcount = curSC->use_sg;
 477                                 sglist = curSC->request_buffer;
 478                                 while (sgcount--) {
 479                                         SYM53C500_pio_read(fast_pio, port_base, page_address(sglist->page) + sglist->offset, sglist->length);
 480                                         sglist++;
 481                                 }
 482                         }
 483                         REG0(port_base);
 484                 }
 485                 break;
 486
 487         case 0x02:              /* COMMAND */
 488                 curSC->SCp.phase = command_ph;
 489                 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
 490                 break;
 491
 492         case 0x03:              /* STATUS */
 493                 curSC->SCp.phase = status_ph;
 494                 VDEB(printk("SYM53C500: Status phase\n"));
 495                 outb(FLUSH_FIFO, port_base + CMD_REG);
 496                 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
 497                 break;
 498
 499         case 0x04:              /* Reserved */
 500         case 0x05:              /* Reserved */
 501                 printk("SYM53C500: WARNING: Reserved phase!!!\n");
 502                 break;
 503
 504         case 0x06:              /* MESSAGE-OUT */
 505                 DEB(printk("SYM53C500: Message-Out phase\n"));
 506                 curSC->SCp.phase = message_out;
 507                 outb(SET_ATN, port_base + CMD_REG);     /* Reject the message */
 508                 outb(MSG_ACCEPT, port_base + CMD_REG);
 509                 break;
 510
 511         case 0x07:              /* MESSAGE-IN */
 512                 VDEB(printk("SYM53C500: Message-In phase\n"));
 513                 curSC->SCp.phase = message_in;
 514
 515                 curSC->SCp.Status = inb(port_base + SCSI_FIFO);
 516                 curSC->SCp.Message = inb(port_base + SCSI_FIFO);
 517
 518                 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
 519                 DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
 520
 521                 if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
 522                         outb(SET_ATN, port_base + CMD_REG);     /* Reject message */
 523                         DEB(printk("Discarding SAVE_POINTERS message\n"));
 524                 }
 525                 outb(MSG_ACCEPT, port_base + CMD_REG);
 526                 break;
 527         }
 528 out:
 529         spin_unlock_irqrestore(dev->host_lock, flags);
 530         return IRQ_HANDLED;
 531
 532 idle_out:
 533         curSC->SCp.phase = idle;
 534         curSC->scsi_done(curSC);
 535         goto out;
 536 }
 537
 538 static void
 539 SYM53C500_release(dev_link_t *link)
 540 {
 541         struct scsi_info_t *info = link->priv;
 542         struct Scsi_Host *shost = info->host;
 543
 544         DEBUG(0, "SYM53C500_release(0x%p)\n", link);
 545
 546         /*
 547         *  Do this before releasing/freeing resources.
 548         */
 549         scsi_remove_host(shost);
 550
 551         /*
 552         *  Interrupts getting hosed on card removal.  Try
 553         *  the following code, mostly from qlogicfas.c.
 554         */
 555         if (shost->irq)
 556                 free_irq(shost->irq, shost);
 557         if (shost->dma_channel != 0xff)
 558                 free_dma(shost->dma_channel);
 559         if (shost->io_port && shost->n_io_port)
 560                 release_region(shost->io_port, shost->n_io_port);
 561
 562         link->dev = NULL;
 563
 564         pcmcia_release_configuration(link->handle);
 565         pcmcia_release_io(link->handle, &link->io);
 566         pcmcia_release_irq(link->handle, &link->irq);
 567
 568         link->state &= ~DEV_CONFIG;
 569
 570         scsi_host_put(shost);
 571 } /* SYM53C500_release */
 572
 573 static const char*
 574 SYM53C500_info(struct Scsi_Host *SChost)
 575 {
 576         static char info_msg[256];
 577         struct sym53c500_data *data =
 578             (struct sym53c500_data *)SChost->hostdata;
 579
 580         DEB(printk("SYM53C500_info called\n"));
 581         (void)snprintf(info_msg, sizeof(info_msg),
 582             "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.",
 583             SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
 584         return (info_msg);
 585 }
 586
 587 static int
 588 SYM53C500_queue(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 589 {
 590         int i;
 591         int port_base = SCpnt->device->host->io_port;
 592         struct sym53c500_data *data =
 593             (struct sym53c500_data *)SCpnt->device->host->hostdata;
 594
 595         VDEB(printk("SYM53C500_queue called\n"));
 596
 597         DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n",
 598             SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id,
 599             SCpnt->device->lun,  SCpnt->request_bufflen));
 600
 601         VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
 602             printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
 603         VDEB(printk("\n"));
 604
 605         data->current_SC = SCpnt;
 606         data->current_SC->scsi_done = done;
 607         data->current_SC->SCp.phase = command_ph;
 608         data->current_SC->SCp.Status = 0;
 609         data->current_SC->SCp.Message = 0;
 610
 611         /* We are locked here already by the mid layer */
 612         REG0(port_base);
 613         outb(scmd_id(SCpnt), port_base + DEST_ID);      /* set destination */
 614         outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
 615
 616         for (i = 0; i < SCpnt->cmd_len; i++) {
 617                 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
 618         }
 619         outb(SELECT_NO_ATN, port_base + CMD_REG);
 620
 621         return 0;
 622 }
 623
 624 static int
 625 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
 626 {
 627         int port_base = SCpnt->device->host->io_port;
 628
 629         DEB(printk("SYM53C500_host_reset called\n"));
 630         spin_lock_irq(SCpnt->device->host->host_lock);
 631         SYM53C500_int_host_reset(port_base);
 632         spin_unlock_irq(SCpnt->device->host->host_lock);
 633
 634         return SUCCESS;
 635 }
 636
 637 static int
 638 SYM53C500_biosparm(struct scsi_device *disk,
 639     struct block_device *dev,
 640     sector_t capacity, int *info_array)
 641 {
 642         int size;
 643
 644         DEB(printk("SYM53C500_biosparm called\n"));
 645
 646         size = capacity;
 647         info_array[0] = 64;             /* heads */
 648         info_array[1] = 32;             /* sectors */
 649         info_array[2] = size >> 11;     /* cylinders */
 650         if (info_array[2] > 1024) {     /* big disk */
 651                 info_array[0] = 255;
 652                 info_array[1] = 63;
 653                 info_array[2] = size / (255 * 63);
 654         }
 655         return 0;
 656 }
 657
 658 static ssize_t
 659 SYM53C500_show_pio(struct class_device *cdev, char *buf)
 660 {
 661         struct Scsi_Host *SHp = class_to_shost(cdev);
 662         struct sym53c500_data *data =
 663             (struct sym53c500_data *)SHp->hostdata;
 664
 665         return snprintf(buf, 4, "%d\n", data->fast_pio);
 666 }
 667
 668 static ssize_t
 669 SYM53C500_store_pio(struct class_device *cdev, const char *buf, size_t count)
 670 {
 671         int pio;
 672         struct Scsi_Host *SHp = class_to_shost(cdev);
 673         struct sym53c500_data *data =
 674             (struct sym53c500_data *)SHp->hostdata;
 675
 676         pio = simple_strtoul(buf, NULL, 0);
 677         if (pio == 0 || pio == 1) {
 678                 data->fast_pio = pio;
 679                 return count;
 680         }
 681         else
 682                 return -EINVAL;
 683 }
 684
 685 /*
 686 *  SCSI HBA device attributes we want to
 687 *  make available via sysfs.
 688 */
 689 static struct class_device_attribute SYM53C500_pio_attr = {
 690         .attr = {
 691                 .name = "fast_pio",
 692                 .mode = (S_IRUGO | S_IWUSR),
 693         },
 694         .show = SYM53C500_show_pio,
 695         .store = SYM53C500_store_pio,
 696 };
 697
 698 static struct class_device_attribute *SYM53C500_shost_attrs[] = {
 699         &SYM53C500_pio_attr,
 700         NULL,
 701 };
 702
 703 /*
 704 *  scsi_host_template initializer
 705 */
 706 static struct scsi_host_template sym53c500_driver_template = {
 707      .module                    = THIS_MODULE,
 708      .name                      = "SYM53C500",
 709      .info                      = SYM53C500_info,
 710      .queuecommand              = SYM53C500_queue,
 711      .eh_host_reset_handler     = SYM53C500_host_reset,
 712      .bios_param                = SYM53C500_biosparm,
 713      .proc_name                 = "SYM53C500",
 714      .can_queue                 = 1,
 715      .this_id                   = 7,
 716      .sg_tablesize              = 32,
 717      .cmd_per_lun               = 1,
 718      .use_clustering            = ENABLE_CLUSTERING,
 719      .shost_attrs               = SYM53C500_shost_attrs
 720 };
 721
 722 #define CS_CHECK(fn, ret) \
 723 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 724
 725 static void
 726 SYM53C500_config(dev_link_t *link)
 727 {
 728         client_handle_t handle = link->handle;
 729         struct scsi_info_t *info = link->priv;
 730         tuple_t tuple;
 731         cisparse_t parse;
 732         int i, last_ret, last_fn;
 733         int irq_level, port_base;
 734         unsigned short tuple_data[32];
 735         struct Scsi_Host *host;
 736         struct scsi_host_template *tpnt = &sym53c500_driver_template;
 737         struct sym53c500_data *data;
 738
 739         DEBUG(0, "SYM53C500_config(0x%p)\n", link);
 740
 741         tuple.TupleData = (cisdata_t *)tuple_data;
 742         tuple.TupleDataMax = 64;
 743         tuple.TupleOffset = 0;
 744         tuple.DesiredTuple = CISTPL_CONFIG;
 745         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 746         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 747         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 748         link->conf.ConfigBase = parse.config.base;
 749
 750         tuple.DesiredTuple = CISTPL_MANFID;
 751         if ((pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) &&
 752             (pcmcia_get_tuple_data(handle, &tuple) == CS_SUCCESS))
 753                 info->manf_id = le16_to_cpu(tuple.TupleData[0]);
 754
 755         /* Configure card */
 756         link->state |= DEV_CONFIG;
 757
 758         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 759         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 760         while (1) {
 761                 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 762                     pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 763                         goto next_entry;
 764                 link->conf.ConfigIndex = parse.cftable_entry.index;
 765                 link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
 766                 link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
 767
 768                 if (link->io.BasePort1 != 0) {
 769                         i = pcmcia_request_io(handle, &link->io);
 770                         if (i == CS_SUCCESS)
 771                                 break;
 772                 }
 773 next_entry:
 774                 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 775         }
 776
 777         CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
 778         CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
 779
 780         /*
 781         *  That's the trouble with copying liberally from another driver.
 782         *  Some things probably aren't relevant, and I suspect this entire
 783         *  section dealing with manufacturer IDs can be scrapped.       --rct
 784         */
 785         if ((info->manf_id == MANFID_MACNICA) ||
 786             (info->manf_id == MANFID_PIONEER) ||
 787             (info->manf_id == 0x0098)) {
 788                 /* set ATAcmd */
 789                 outb(0xb4, link->io.BasePort1 + 0xd);
 790                 outb(0x24, link->io.BasePort1 + 0x9);
 791                 outb(0x04, link->io.BasePort1 + 0xd);
 792         }
 793
 794         /*
 795         *  irq_level == 0 implies tpnt->can_queue == 0, which
 796         *  is not supported in 2.6.  Thus, only irq_level > 0
 797         *  will be allowed.
 798         *
 799         *  Possible port_base values are as follows:
 800         *
 801         *       0x130, 0x230, 0x280, 0x290,
 802         *       0x320, 0x330, 0x340, 0x350
 803         */
 804         port_base = link->io.BasePort1;
 805         irq_level = link->irq.AssignedIRQ;
 806
 807         DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
 808             port_base, irq_level, USE_FAST_PIO);)
 809
 810         chip_init(port_base);
 811
 812         host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
 813         if (!host) {
 814                 printk("SYM53C500: Unable to register host, giving up.\n");
 815                 goto err_release;
 816         }
 817
 818         data = (struct sym53c500_data *)host->hostdata;
 819
 820         if (irq_level > 0) {
 821                 if (request_irq(irq_level, SYM53C500_intr, SA_SHIRQ, "SYM53C500", host)) {
 822                         printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
 823                         goto err_free_scsi;
 824                 }
 825                 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
 826         } else if (irq_level == 0) {
 827                 DEB(printk("SYM53C500: No interrupts detected\n"));
 828                 goto err_free_scsi;
 829         } else {
 830                 DEB(printk("SYM53C500: Shouldn't get here!\n"));
 831                 goto err_free_scsi;
 832         }
 833
 834         host->unique_id = port_base;
 835         host->irq = irq_level;
 836         host->io_port = port_base;
 837         host->n_io_port = 0x10;
 838         host->dma_channel = -1;
 839
 840         /*
 841         *  Note fast_pio is set to USE_FAST_PIO by
 842         *  default, but can be changed via "sysfs".
 843         */
 844         data->fast_pio = USE_FAST_PIO;
 845
 846         sprintf(info->node.dev_name, "scsi%d", host->host_no);
 847         link->dev = &info->node;
 848         info->host = host;
 849
 850         if (scsi_add_host(host, NULL))
 851                 goto err_free_irq;
 852
 853         scsi_scan_host(host);
 854
 855         goto out;       /* SUCCESS */
 856
 857 err_free_irq:
 858         free_irq(irq_level, host);
 859 err_free_scsi:
 860         scsi_host_put(host);
 861 err_release:
 862         release_region(port_base, 0x10);
 863         printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
 864
 865 out:
 866         link->state &= ~DEV_CONFIG_PENDING;
 867         return;
 868
 869 cs_failed:
 870         cs_error(link->handle, last_fn, last_ret);
 871         SYM53C500_release(link);
 872         return;
 873 } /* SYM53C500_config */
 874
 875 static int
 876 SYM53C500_event(event_t event, int priority, event_callback_args_t *args)
 877 {
 878         dev_link_t *link = args->client_data;
 879         struct scsi_info_t *info = link->priv;
 880
 881         DEBUG(1, "SYM53C500_event(0x%06x)\n", event);
 882
 883         switch (event) {
 884         case CS_EVENT_CARD_REMOVAL:
 885                 link->state &= ~DEV_PRESENT;
 886                 if (link->state & DEV_CONFIG)
 887                         SYM53C500_release(link);
 888                 break;
 889         case CS_EVENT_CARD_INSERTION:
 890                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 891                 SYM53C500_config(link);
 892                 break;
 893         case CS_EVENT_PM_SUSPEND:
 894                 link->state |= DEV_SUSPEND;
 895                 /* Fall through... */
 896         case CS_EVENT_RESET_PHYSICAL:
 897                 if (link->state & DEV_CONFIG)
 898                         pcmcia_release_configuration(link->handle);
 899                 break;
 900         case CS_EVENT_PM_RESUME:
 901                 link->state &= ~DEV_SUSPEND;
 902                 /* Fall through... */
 903         case CS_EVENT_CARD_RESET:
 904                 if (link->state & DEV_CONFIG) {
 905                         pcmcia_request_configuration(link->handle, &link->conf);
 906                         /* See earlier comment about manufacturer IDs. */
 907                         if ((info->manf_id == MANFID_MACNICA) ||
 908                             (info->manf_id == MANFID_PIONEER) ||
 909                             (info->manf_id == 0x0098)) {
 910                                 outb(0x80, link->io.BasePort1 + 0xd);
 911                                 outb(0x24, link->io.BasePort1 + 0x9);
 912                                 outb(0x04, link->io.BasePort1 + 0xd);
 913                         }
 914                         /*
 915                         *  If things don't work after a "resume",
 916                         *  this is a good place to start looking.
 917                         */
 918                         SYM53C500_int_host_reset(link->io.BasePort1);
 919                 }
 920                 break;
 921         }
 922         return 0;
 923 } /* SYM53C500_event */
 924
 925 static void
 926 SYM53C500_detach(dev_link_t *link)
 927 {
 928         dev_link_t **linkp;
 929
 930         DEBUG(0, "SYM53C500_detach(0x%p)\n", link);
 931
 932         /* Locate device structure */
 933         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
 934                 if (*linkp == link)
 935                         break;
 936         if (*linkp == NULL)
 937                 return;
 938
 939         if (link->state & DEV_CONFIG)
 940                 SYM53C500_release(link);
 941
 942         if (link->handle)
 943                 pcmcia_deregister_client(link->handle);
 944
 945         /* Unlink device structure, free bits. */
 946         *linkp = link->next;
 947         kfree(link->priv);
 948         link->priv = NULL;
 949 } /* SYM53C500_detach */
 950
 951 static dev_link_t *
 952 SYM53C500_attach(void)
 953 {
 954         struct scsi_info_t *info;
 955         client_reg_t client_reg;
 956         dev_link_t *link;
 957         int ret;
 958
 959         DEBUG(0, "SYM53C500_attach()\n");
 960
 961         /* Create new SCSI device */
 962         info = kmalloc(sizeof(*info), GFP_KERNEL);
 963         if (!info)
 964                 return NULL;
 965         memset(info, 0, sizeof(*info));
 966         link = &info->link;
 967         link->priv = info;
 968         link->io.NumPorts1 = 16;
 969         link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 970         link->io.IOAddrLines = 10;
 971         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 972         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 973         link->conf.Attributes = CONF_ENABLE_IRQ;
 974         link->conf.Vcc = 50;
 975         link->conf.IntType = INT_MEMORY_AND_IO;
 976         link->conf.Present = PRESENT_OPTION;
 977
 978         /* Register with Card Services */
 979         link->next = dev_list;
 980         dev_list = link;
 981         client_reg.dev_info = &dev_info;
 982         client_reg.Version = 0x0210;
 983         client_reg.event_callback_args.client_data = link;
 984         ret = pcmcia_register_client(&link->handle, &client_reg);
 985         if (ret != 0) {
 986                 cs_error(link->handle, RegisterClient, ret);
 987                 SYM53C500_detach(link);
 988                 return NULL;
 989         }
 990
 991         return link;
 992 } /* SYM53C500_attach */
 993
 994 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
 995 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
 996 MODULE_LICENSE("GPL");
 997
 998 static struct pcmcia_device_id sym53c500_ids[] = {
 999         PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
1000         PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
1001         PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
1002         PCMCIA_DEVICE_NULL,
1003 };
1004 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
1005
1006 static struct pcmcia_driver sym53c500_cs_driver = {
1007         .owner          = THIS_MODULE,
1008         .drv            = {
1009                 .name   = "sym53c500_cs",
1010         },
1011         .attach         = SYM53C500_attach,
1012         .event          = SYM53C500_event,
1013         .detach         = SYM53C500_detach,
1014         .id_table       = sym53c500_ids,
1015 };
1016
1017 static int __init
1018 init_sym53c500_cs(void)
1019 {
1020         return pcmcia_register_driver(&sym53c500_cs_driver);
1021 }
1022
1023 static void __exit
1024 exit_sym53c500_cs(void)
1025 {
1026         pcmcia_unregister_driver(&sym53c500_cs_driver);
1027 }
1028
1029 module_init(init_sym53c500_cs);
1030 module_exit(exit_sym53c500_cs);