drivers/scsi/pcmcia/sym53c500

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This source file includes following definitions.
chip_init
SYM53C500_int_host_reset
SYM53C500_pio_read
SYM53C500_pio_write
SYM53C500_intr
SYM53C500_release
SYM53C500_info
SYM53C500_queue_lck
DEF_SCSI_QCMD
SYM53C500_biosparm
SYM53C500_show_pio
SYM53C500_store_pio
SYM53C500_config_check
SYM53C500_config
sym53c500_resume
SYM53C500_detach
SYM53C500_probe
   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 enum Phase {
 196     idle,
 197     data_out,
 198     data_in,
 199     command_ph,
 200     status_ph,
 201     message_out,
 202     message_in
 203 };
 204 
 205 /* ================================================================== */
 206 
 207 static void
 208 chip_init(int io_port)
 209 {
 210         REG1(io_port);
 211         outb(0x01, io_port + PIO_STATUS);
 212         outb(0x00, io_port + PIO_FLAG);
 213 
 214         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 215         outb(C3_IMG, io_port + CONFIG3);
 216         outb(C2_IMG, io_port + CONFIG2);
 217         outb(C1_IMG, io_port + CONFIG1);
 218 
 219         outb(0x05, io_port + CLKCONV);  /* clock conversion factor */
 220         outb(0x9C, io_port + SRTIMOUT); /* Selection timeout */
 221         outb(0x05, io_port + SYNCPRD);  /* Synchronous transfer period */
 222         outb(SYNC_MODE, io_port + SYNCOFF);     /* synchronous mode */  
 223 }
 224 
 225 static void
 226 SYM53C500_int_host_reset(int io_port)
 227 {
 228         outb(C4_IMG, io_port + CONFIG4);        /* REG0(io_port); */
 229         outb(CHIP_RESET, io_port + CMD_REG);
 230         outb(SCSI_NOP, io_port + CMD_REG);      /* required after reset */
 231         outb(SCSI_RESET, io_port + CMD_REG);
 232         chip_init(io_port);
 233 }
 234 
 235 static __inline__ int
 236 SYM53C500_pio_read(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 237 {
 238         int i;
 239         int len;        /* current scsi fifo size */
 240 
 241         REG1(base);
 242         while (reqlen) {
 243                 i = inb(base + PIO_STATUS);
 244                 /* VDEB(printk("pio_status=%x\n", i)); */
 245                 if (i & 0x80) 
 246                         return 0;
 247 
 248                 switch (i & 0x1e) {
 249                 default:
 250                 case 0x10:      /* fifo empty */
 251                         len = 0;
 252                         break;
 253                 case 0x0:
 254                         len = 1;
 255                         break; 
 256                 case 0x8:       /* fifo 1/3 full */
 257                         len = 42;
 258                         break;
 259                 case 0xc:       /* fifo 2/3 full */
 260                         len = 84;
 261                         break;
 262                 case 0xe:       /* fifo full */
 263                         len = 128;
 264                         break;
 265                 }
 266 
 267                 if ((i & 0x40) && len == 0) { /* fifo empty and interrupt occurred */
 268                         return 0;
 269                 }
 270 
 271                 if (len) {
 272                         if (len > reqlen) 
 273                                 len = reqlen;
 274 
 275                         if (fast_pio && len > 3) {
 276                                 insl(base + PIO_FIFO, request, len >> 2);
 277                                 request += len & 0xfc; 
 278                                 reqlen -= len & 0xfc; 
 279                         } else {
 280                                 while (len--) {
 281                                         *request++ = inb(base + PIO_FIFO);
 282                                         reqlen--;
 283                                 }
 284                         } 
 285                 }
 286         }
 287         return 0;
 288 }
 289 
 290 static __inline__ int
 291 SYM53C500_pio_write(int fast_pio, int base, unsigned char *request, unsigned int reqlen)
 292 {
 293         int i = 0;
 294         int len;        /* current scsi fifo size */
 295 
 296         REG1(base);
 297         while (reqlen && !(i & 0x40)) {
 298                 i = inb(base + PIO_STATUS);
 299                 /* VDEB(printk("pio_status=%x\n", i)); */
 300                 if (i & 0x80)   /* error */
 301                         return 0;
 302 
 303                 switch (i & 0x1e) {
 304                 case 0x10:
 305                         len = 128;
 306                         break;
 307                 case 0x0:
 308                         len = 84;
 309                         break;
 310                 case 0x8:
 311                         len = 42;
 312                         break;
 313                 case 0xc:
 314                         len = 1;
 315                         break;
 316                 default:
 317                 case 0xe:
 318                         len = 0;
 319                         break;
 320                 }
 321 
 322                 if (len) {
 323                         if (len > reqlen)
 324                                 len = reqlen;
 325 
 326                         if (fast_pio && len > 3) {
 327                                 outsl(base + PIO_FIFO, request, len >> 2);
 328                                 request += len & 0xfc;
 329                                 reqlen -= len & 0xfc;
 330                         } else {
 331                                 while (len--) {
 332                                         outb(*request++, base + PIO_FIFO);
 333                                         reqlen--;
 334                                 }
 335                         }
 336                 }
 337         }
 338         return 0;
 339 }
 340 
 341 static irqreturn_t
 342 SYM53C500_intr(int irq, void *dev_id)
 343 {
 344         unsigned long flags;
 345         struct Scsi_Host *dev = dev_id;
 346         DEB(unsigned char fifo_size;)
 347         DEB(unsigned char seq_reg;)
 348         unsigned char status, int_reg;
 349         unsigned char pio_status;
 350         int port_base = dev->io_port;
 351         struct sym53c500_data *data =
 352             (struct sym53c500_data *)dev->hostdata;
 353         struct scsi_cmnd *curSC = data->current_SC;
 354         int fast_pio = data->fast_pio;
 355 
 356         spin_lock_irqsave(dev->host_lock, flags);
 357 
 358         VDEB(printk("SYM53C500_intr called\n"));
 359 
 360         REG1(port_base);
 361         pio_status = inb(port_base + PIO_STATUS);
 362         REG0(port_base);
 363         status = inb(port_base + STAT_REG);
 364         DEB(seq_reg = inb(port_base + SEQ_REG));
 365         int_reg = inb(port_base + INT_REG);
 366         DEB(fifo_size = inb(port_base + FIFO_FLAGS) & 0x1f);
 367 
 368 #if SYM53C500_DEBUG
 369         printk("status=%02x, seq_reg=%02x, int_reg=%02x, fifo_size=%02x", 
 370             status, seq_reg, int_reg, fifo_size);
 371         printk(", pio=%02x\n", pio_status);
 372 #endif /* SYM53C500_DEBUG */
 373 
 374         if (int_reg & 0x80) {   /* SCSI reset intr */
 375                 DEB(printk("SYM53C500: reset intr received\n"));
 376                 curSC->result = DID_RESET << 16;
 377                 goto idle_out;
 378         }
 379 
 380         if (pio_status & 0x80) {
 381                 printk("SYM53C500: Warning: PIO error!\n");
 382                 curSC->result = DID_ERROR << 16;
 383                 goto idle_out;
 384         }
 385 
 386         if (status & 0x20) {            /* Parity error */
 387                 printk("SYM53C500: Warning: parity error!\n");
 388                 curSC->result = DID_PARITY << 16;
 389                 goto idle_out;
 390         }
 391 
 392         if (status & 0x40) {            /* Gross error */
 393                 printk("SYM53C500: Warning: gross error!\n");
 394                 curSC->result = DID_ERROR << 16;
 395                 goto idle_out;
 396         }
 397 
 398         if (int_reg & 0x20) {           /* Disconnect */
 399                 DEB(printk("SYM53C500: disconnect intr received\n"));
 400                 if (curSC->SCp.phase != message_in) {   /* Unexpected disconnect */
 401                         curSC->result = DID_NO_CONNECT << 16;
 402                 } else {        /* Command complete, return status and message */
 403                         curSC->result = (curSC->SCp.Status & 0xff)
 404                             | ((curSC->SCp.Message & 0xff) << 8) | (DID_OK << 16);
 405                 }
 406                 goto idle_out;
 407         }
 408 
 409         switch (status & 0x07) {        /* scsi phase */
 410         case 0x00:                      /* DATA-OUT */
 411                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 412                         struct scatterlist *sg;
 413                         int i;
 414 
 415                         curSC->SCp.phase = data_out;
 416                         VDEB(printk("SYM53C500: Data-Out phase\n"));
 417                         outb(FLUSH_FIFO, port_base + CMD_REG);
 418                         LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
 419                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 420 
 421                         scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
 422                                 SYM53C500_pio_write(fast_pio, port_base,
 423                                     sg_virt(sg), sg->length);
 424                         }
 425                         REG0(port_base);
 426                 }
 427                 break;
 428 
 429         case 0x01:              /* DATA-IN */
 430                 if (int_reg & 0x10) {   /* Target requesting info transfer */
 431                         struct scatterlist *sg;
 432                         int i;
 433 
 434                         curSC->SCp.phase = data_in;
 435                         VDEB(printk("SYM53C500: Data-In phase\n"));
 436                         outb(FLUSH_FIFO, port_base + CMD_REG);
 437                         LOAD_DMA_COUNT(port_base, scsi_bufflen(curSC)); /* Max transfer size */
 438                         outb(TRANSFER_INFO | DMA_OP, port_base + CMD_REG);
 439 
 440                         scsi_for_each_sg(curSC, sg, scsi_sg_count(curSC), i) {
 441                                 SYM53C500_pio_read(fast_pio, port_base,
 442                                         sg_virt(sg), sg->length);
 443                         }
 444                         REG0(port_base);
 445                 }
 446                 break;
 447 
 448         case 0x02:              /* COMMAND */
 449                 curSC->SCp.phase = command_ph;
 450                 printk("SYM53C500: Warning: Unknown interrupt occurred in command phase!\n");
 451                 break;
 452 
 453         case 0x03:              /* STATUS */
 454                 curSC->SCp.phase = status_ph;
 455                 VDEB(printk("SYM53C500: Status phase\n"));
 456                 outb(FLUSH_FIFO, port_base + CMD_REG);
 457                 outb(INIT_CMD_COMPLETE, port_base + CMD_REG);
 458                 break;
 459 
 460         case 0x04:              /* Reserved */
 461         case 0x05:              /* Reserved */
 462                 printk("SYM53C500: WARNING: Reserved phase!!!\n");
 463                 break;
 464 
 465         case 0x06:              /* MESSAGE-OUT */
 466                 DEB(printk("SYM53C500: Message-Out phase\n"));
 467                 curSC->SCp.phase = message_out;
 468                 outb(SET_ATN, port_base + CMD_REG);     /* Reject the message */
 469                 outb(MSG_ACCEPT, port_base + CMD_REG);
 470                 break;
 471 
 472         case 0x07:              /* MESSAGE-IN */
 473                 VDEB(printk("SYM53C500: Message-In phase\n"));
 474                 curSC->SCp.phase = message_in;
 475 
 476                 curSC->SCp.Status = inb(port_base + SCSI_FIFO);
 477                 curSC->SCp.Message = inb(port_base + SCSI_FIFO);
 478 
 479                 VDEB(printk("SCSI FIFO size=%d\n", inb(port_base + FIFO_FLAGS) & 0x1f));
 480                 DEB(printk("Status = %02x  Message = %02x\n", curSC->SCp.Status, curSC->SCp.Message));
 481 
 482                 if (curSC->SCp.Message == SAVE_POINTERS || curSC->SCp.Message == DISCONNECT) {
 483                         outb(SET_ATN, port_base + CMD_REG);     /* Reject message */
 484                         DEB(printk("Discarding SAVE_POINTERS message\n"));
 485                 }
 486                 outb(MSG_ACCEPT, port_base + CMD_REG);
 487                 break;
 488         }
 489 out:
 490         spin_unlock_irqrestore(dev->host_lock, flags);
 491         return IRQ_HANDLED;
 492 
 493 idle_out:
 494         curSC->SCp.phase = idle;
 495         curSC->scsi_done(curSC);
 496         goto out;
 497 }
 498 
 499 static void
 500 SYM53C500_release(struct pcmcia_device *link)
 501 {
 502         struct scsi_info_t *info = link->priv;
 503         struct Scsi_Host *shost = info->host;
 504 
 505         dev_dbg(&link->dev, "SYM53C500_release\n");
 506 
 507         /*
 508         *  Do this before releasing/freeing resources.
 509         */
 510         scsi_remove_host(shost);
 511 
 512         /*
 513         *  Interrupts getting hosed on card removal.  Try
 514         *  the following code, mostly from qlogicfas.c.
 515         */
 516         if (shost->irq)
 517                 free_irq(shost->irq, shost);
 518         if (shost->io_port && shost->n_io_port)
 519                 release_region(shost->io_port, shost->n_io_port);
 520 
 521         pcmcia_disable_device(link);
 522 
 523         scsi_host_put(shost);
 524 } /* SYM53C500_release */
 525 
 526 static const char*
 527 SYM53C500_info(struct Scsi_Host *SChost)
 528 {
 529         static char info_msg[256];
 530         struct sym53c500_data *data =
 531             (struct sym53c500_data *)SChost->hostdata;
 532 
 533         DEB(printk("SYM53C500_info called\n"));
 534         (void)snprintf(info_msg, sizeof(info_msg),
 535             "SYM53C500 at 0x%lx, IRQ %d, %s PIO mode.", 
 536             SChost->io_port, SChost->irq, data->fast_pio ? "fast" : "slow");
 537         return (info_msg);
 538 }
 539 
 540 static int 
 541 SYM53C500_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 542 {
 543         int i;
 544         int port_base = SCpnt->device->host->io_port;
 545         struct sym53c500_data *data =
 546             (struct sym53c500_data *)SCpnt->device->host->hostdata;
 547 
 548         VDEB(printk("SYM53C500_queue called\n"));
 549 
 550         DEB(printk("cmd=%02x, cmd_len=%02x, target=%02x, lun=%02x, bufflen=%d\n", 
 551             SCpnt->cmnd[0], SCpnt->cmd_len, SCpnt->device->id, 
 552                    (u8)SCpnt->device->lun,  scsi_bufflen(SCpnt)));
 553 
 554         VDEB(for (i = 0; i < SCpnt->cmd_len; i++)
 555             printk("cmd[%d]=%02x  ", i, SCpnt->cmnd[i]));
 556         VDEB(printk("\n"));
 557 
 558         data->current_SC = SCpnt;
 559         data->current_SC->scsi_done = done;
 560         data->current_SC->SCp.phase = command_ph;
 561         data->current_SC->SCp.Status = 0;
 562         data->current_SC->SCp.Message = 0;
 563 
 564         /* We are locked here already by the mid layer */
 565         REG0(port_base);
 566         outb(scmd_id(SCpnt), port_base + DEST_ID);      /* set destination */
 567         outb(FLUSH_FIFO, port_base + CMD_REG);  /* reset the fifos */
 568 
 569         for (i = 0; i < SCpnt->cmd_len; i++) {
 570                 outb(SCpnt->cmnd[i], port_base + SCSI_FIFO);
 571         }
 572         outb(SELECT_NO_ATN, port_base + CMD_REG);
 573 
 574         return 0;
 575 }
 576 
 577 static DEF_SCSI_QCMD(SYM53C500_queue)
 578 
 579 static int 
 580 SYM53C500_host_reset(struct scsi_cmnd *SCpnt)
 581 {
 582         int port_base = SCpnt->device->host->io_port;
 583 
 584         DEB(printk("SYM53C500_host_reset called\n"));
 585         spin_lock_irq(SCpnt->device->host->host_lock);
 586         SYM53C500_int_host_reset(port_base);
 587         spin_unlock_irq(SCpnt->device->host->host_lock);
 588 
 589         return SUCCESS;
 590 }
 591 
 592 static int 
 593 SYM53C500_biosparm(struct scsi_device *disk,
 594     struct block_device *dev,
 595     sector_t capacity, int *info_array)
 596 {
 597         int size;
 598 
 599         DEB(printk("SYM53C500_biosparm called\n"));
 600 
 601         size = capacity;
 602         info_array[0] = 64;             /* heads */
 603         info_array[1] = 32;             /* sectors */
 604         info_array[2] = size >> 11;     /* cylinders */
 605         if (info_array[2] > 1024) {     /* big disk */
 606                 info_array[0] = 255;
 607                 info_array[1] = 63;
 608                 info_array[2] = size / (255 * 63);
 609         }
 610         return 0;
 611 }
 612 
 613 static ssize_t
 614 SYM53C500_show_pio(struct device *dev, struct device_attribute *attr,
 615                    char *buf)
 616 {
 617         struct Scsi_Host *SHp = class_to_shost(dev);
 618         struct sym53c500_data *data =
 619             (struct sym53c500_data *)SHp->hostdata;
 620 
 621         return snprintf(buf, 4, "%d\n", data->fast_pio);
 622 }
 623 
 624 static ssize_t
 625 SYM53C500_store_pio(struct device *dev, struct device_attribute *attr,
 626                     const char *buf, size_t count)
 627 {
 628         int pio;
 629         struct Scsi_Host *SHp = class_to_shost(dev);
 630         struct sym53c500_data *data =
 631             (struct sym53c500_data *)SHp->hostdata;
 632 
 633         pio = simple_strtoul(buf, NULL, 0);
 634         if (pio == 0 || pio == 1) {
 635                 data->fast_pio = pio;
 636                 return count;
 637         }
 638         else
 639                 return -EINVAL;
 640 }
 641 
 642 /*
 643 *  SCSI HBA device attributes we want to
 644 *  make available via sysfs.
 645 */
 646 static struct device_attribute SYM53C500_pio_attr = {
 647         .attr = {
 648                 .name = "fast_pio",
 649                 .mode = (S_IRUGO | S_IWUSR),
 650         },
 651         .show = SYM53C500_show_pio,
 652         .store = SYM53C500_store_pio,
 653 };
 654 
 655 static struct device_attribute *SYM53C500_shost_attrs[] = {
 656         &SYM53C500_pio_attr,
 657         NULL,
 658 };
 659 
 660 /*
 661 *  scsi_host_template initializer
 662 */
 663 static struct scsi_host_template sym53c500_driver_template = {
 664      .module                    = THIS_MODULE,
 665      .name                      = "SYM53C500",
 666      .info                      = SYM53C500_info,
 667      .queuecommand              = SYM53C500_queue,
 668      .eh_host_reset_handler     = SYM53C500_host_reset,
 669      .bios_param                = SYM53C500_biosparm,
 670      .proc_name                 = "SYM53C500",
 671      .can_queue                 = 1,
 672      .this_id                   = 7,
 673      .sg_tablesize              = 32,
 674      .shost_attrs               = SYM53C500_shost_attrs
 675 };
 676 
 677 static int SYM53C500_config_check(struct pcmcia_device *p_dev, void *priv_data)
 678 {
 679         p_dev->io_lines = 10;
 680         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 681         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 682 
 683         if (p_dev->resource[0]->start == 0)
 684                 return -ENODEV;
 685 
 686         return pcmcia_request_io(p_dev);
 687 }
 688 
 689 static int
 690 SYM53C500_config(struct pcmcia_device *link)
 691 {
 692         struct scsi_info_t *info = link->priv;
 693         int ret;
 694         int irq_level, port_base;
 695         struct Scsi_Host *host;
 696         struct scsi_host_template *tpnt = &sym53c500_driver_template;
 697         struct sym53c500_data *data;
 698 
 699         dev_dbg(&link->dev, "SYM53C500_config\n");
 700 
 701         info->manf_id = link->manf_id;
 702 
 703         ret = pcmcia_loop_config(link, SYM53C500_config_check, NULL);
 704         if (ret)
 705                 goto failed;
 706 
 707         if (!link->irq)
 708                 goto failed;
 709 
 710         ret = pcmcia_enable_device(link);
 711         if (ret)
 712                 goto failed;
 713 
 714         /*
 715         *  That's the trouble with copying liberally from another driver.
 716         *  Some things probably aren't relevant, and I suspect this entire
 717         *  section dealing with manufacturer IDs can be scrapped.       --rct
 718         */
 719         if ((info->manf_id == MANFID_MACNICA) ||
 720             (info->manf_id == MANFID_PIONEER) ||
 721             (info->manf_id == 0x0098)) {
 722                 /* set ATAcmd */
 723                 outb(0xb4, link->resource[0]->start + 0xd);
 724                 outb(0x24, link->resource[0]->start + 0x9);
 725                 outb(0x04, link->resource[0]->start + 0xd);
 726         }
 727 
 728         /*
 729         *  irq_level == 0 implies tpnt->can_queue == 0, which
 730         *  is not supported in 2.6.  Thus, only irq_level > 0
 731         *  will be allowed.
 732         *
 733         *  Possible port_base values are as follows:
 734         *
 735         *       0x130, 0x230, 0x280, 0x290,
 736         *       0x320, 0x330, 0x340, 0x350
 737         */
 738         port_base = link->resource[0]->start;
 739         irq_level = link->irq;
 740 
 741         DEB(printk("SYM53C500: port_base=0x%x, irq=%d, fast_pio=%d\n",
 742             port_base, irq_level, USE_FAST_PIO);)
 743 
 744         chip_init(port_base);
 745 
 746         host = scsi_host_alloc(tpnt, sizeof(struct sym53c500_data));
 747         if (!host) {
 748                 printk("SYM53C500: Unable to register host, giving up.\n");
 749                 goto err_release;
 750         }
 751 
 752         data = (struct sym53c500_data *)host->hostdata;
 753 
 754         if (irq_level > 0) {
 755                 if (request_irq(irq_level, SYM53C500_intr, IRQF_SHARED, "SYM53C500", host)) {
 756                         printk("SYM53C500: unable to allocate IRQ %d\n", irq_level);
 757                         goto err_free_scsi;
 758                 }
 759                 DEB(printk("SYM53C500: allocated IRQ %d\n", irq_level));
 760         } else if (irq_level == 0) {
 761                 DEB(printk("SYM53C500: No interrupts detected\n"));
 762                 goto err_free_scsi;
 763         } else {
 764                 DEB(printk("SYM53C500: Shouldn't get here!\n"));
 765                 goto err_free_scsi;
 766         }
 767 
 768         host->unique_id = port_base;
 769         host->irq = irq_level;
 770         host->io_port = port_base;
 771         host->n_io_port = 0x10;
 772         host->dma_channel = -1;
 773 
 774         /*
 775         *  Note fast_pio is set to USE_FAST_PIO by
 776         *  default, but can be changed via "sysfs".
 777         */
 778         data->fast_pio = USE_FAST_PIO;
 779 
 780         info->host = host;
 781 
 782         if (scsi_add_host(host, NULL))
 783                 goto err_free_irq;
 784 
 785         scsi_scan_host(host);
 786 
 787         return 0;
 788 
 789 err_free_irq:
 790         free_irq(irq_level, host);
 791 err_free_scsi:
 792         scsi_host_put(host);
 793 err_release:
 794         release_region(port_base, 0x10);
 795         printk(KERN_INFO "sym53c500_cs: no SCSI devices found\n");
 796         return -ENODEV;
 797 
 798 failed:
 799         SYM53C500_release(link);
 800         return -ENODEV;
 801 } /* SYM53C500_config */
 802 
 803 static int sym53c500_resume(struct pcmcia_device *link)
 804 {
 805         struct scsi_info_t *info = link->priv;
 806 
 807         /* See earlier comment about manufacturer IDs. */
 808         if ((info->manf_id == MANFID_MACNICA) ||
 809             (info->manf_id == MANFID_PIONEER) ||
 810             (info->manf_id == 0x0098)) {
 811                 outb(0x80, link->resource[0]->start + 0xd);
 812                 outb(0x24, link->resource[0]->start + 0x9);
 813                 outb(0x04, link->resource[0]->start + 0xd);
 814         }
 815         /*
 816          *  If things don't work after a "resume",
 817          *  this is a good place to start looking.
 818          */
 819         SYM53C500_int_host_reset(link->resource[0]->start);
 820 
 821         return 0;
 822 }
 823 
 824 static void
 825 SYM53C500_detach(struct pcmcia_device *link)
 826 {
 827         dev_dbg(&link->dev, "SYM53C500_detach\n");
 828 
 829         SYM53C500_release(link);
 830 
 831         kfree(link->priv);
 832         link->priv = NULL;
 833 } /* SYM53C500_detach */
 834 
 835 static int
 836 SYM53C500_probe(struct pcmcia_device *link)
 837 {
 838         struct scsi_info_t *info;
 839 
 840         dev_dbg(&link->dev, "SYM53C500_attach()\n");
 841 
 842         /* Create new SCSI device */
 843         info = kzalloc(sizeof(*info), GFP_KERNEL);
 844         if (!info)
 845                 return -ENOMEM;
 846         info->p_dev = link;
 847         link->priv = info;
 848         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 849 
 850         return SYM53C500_config(link);
 851 } /* SYM53C500_attach */
 852 
 853 MODULE_AUTHOR("Bob Tracy <rct@frus.com>");
 854 MODULE_DESCRIPTION("SYM53C500 PCMCIA SCSI driver");
 855 MODULE_LICENSE("GPL");
 856 
 857 static const struct pcmcia_device_id sym53c500_ids[] = {
 858         PCMCIA_DEVICE_PROD_ID12("BASICS by New Media Corporation", "SCSI Sym53C500", 0x23c78a9d, 0x0099e7f7),
 859         PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "SCSI Bus Toaster Sym53C500", 0x085a850b, 0x45432eb8),
 860         PCMCIA_DEVICE_PROD_ID2("SCSI9000", 0x21648f44),
 861         PCMCIA_DEVICE_NULL,
 862 };
 863 MODULE_DEVICE_TABLE(pcmcia, sym53c500_ids);
 864 
 865 static struct pcmcia_driver sym53c500_cs_driver = {
 866         .owner          = THIS_MODULE,
 867         .name           = "sym53c500_cs",
 868         .probe          = SYM53C500_probe,
 869         .remove         = SYM53C500_detach,
 870         .id_table       = sym53c500_ids,
 871         .resume         = sym53c500_resume,
 872 };
 873 module_pcmcia_driver(sym53c500_cs_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/pcmcia/sym53c500_cs.c

DEFINITIONS
