drivers/scsi/sym53c416.c

   1 /*
   2  *  sym53c416.c
   3  *  Low-level SCSI driver for sym53c416 chip.
   4  *  Copyright (C) 1998 Lieven Willems (lw_linux@hotmail.com)
   5  *
   6  *  Changes :
   7  *
   8  *  Marcelo Tosatti <marcelo@conectiva.com.br> : Added io_request_lock locking
   9  *  Alan Cox <alan@lxorguk.ukuu.org.uk> : Cleaned up code formatting
  10  *                               Fixed an irq locking bug
  11  *                               Added ISAPnP support
  12  *  Bjoern A. Zeeb <bzeeb@zabbadoz.net> : Initial irq locking updates
  13  *                                        Added another card with ISAPnP support
  14  *
  15  *  LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
  16  *
  17  *  This program is free software; you can redistribute it and/or modify it
  18  *  under the terms of the GNU General Public License as published by the
  19  *  Free Software Foundation; either version 2, or (at your option) any
  20  *  later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful, but
  23  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25  *  General Public License for more details.
  26  *
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/types.h>
  32 #include <linux/init.h>
  33 #include <linux/string.h>
  34 #include <linux/ioport.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/delay.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/spinlock.h>
  39 #include <asm/dma.h>
  40 #include <asm/io.h>
  41 #include <linux/blkdev.h>
  42 #include <linux/isapnp.h>
  43 #include "scsi.h"
  44 #include <scsi/scsi_host.h>
  45 #include "sym53c416.h"
  46
  47 #define VERSION_STRING        "Version 1.0.0-ac"
  48
  49 #define TC_LOW       0x00     /* Transfer counter low        */
  50 #define TC_MID       0x01     /* Transfer counter mid        */
  51 #define SCSI_FIFO    0x02     /* SCSI FIFO register          */
  52 #define COMMAND_REG  0x03     /* Command Register            */
  53 #define STATUS_REG   0x04     /* Status Register (READ)      */
  54 #define DEST_BUS_ID  0x04     /* Destination Bus ID (WRITE)  */
  55 #define INT_REG      0x05     /* Interrupt Register (READ)   */
  56 #define TOM          0x05     /* Time out multiplier (WRITE) */
  57 #define STP          0x06     /* Synchronous Transfer period */
  58 #define SYNC_OFFSET  0x07     /* Synchronous Offset          */
  59 #define CONF_REG_1   0x08     /* Configuration register 1    */
  60 #define CONF_REG_2   0x0B     /* Configuration register 2    */
  61 #define CONF_REG_3   0x0C     /* Configuration register 3    */
  62 #define CONF_REG_4   0x0D     /* Configuration register 4    */
  63 #define TC_HIGH      0x0E     /* Transfer counter high       */
  64 #define PIO_FIFO_1   0x10     /* PIO FIFO register 1         */
  65 #define PIO_FIFO_2   0x11     /* PIO FIFO register 2         */
  66 #define PIO_FIFO_3   0x12     /* PIO FIFO register 3         */
  67 #define PIO_FIFO_4   0x13     /* PIO FIFO register 4         */
  68 #define PIO_FIFO_CNT 0x14     /* PIO FIFO count              */
  69 #define PIO_INT_REG  0x15     /* PIO interrupt register      */
  70 #define CONF_REG_5   0x16     /* Configuration register 5    */
  71 #define FEATURE_EN   0x1D     /* Feature Enable register     */
  72
  73 /* Configuration register 1 entries: */
  74 /* Bits 2-0: SCSI ID of host adapter */
  75 #define SCM    0x80                     /* Slow Cable Mode              */
  76 #define SRID   0x40                     /* SCSI Reset Interrupt Disable */
  77 #define PTM    0x20                     /* Parity Test Mode             */
  78 #define EPC    0x10                     /* Enable Parity Checking       */
  79 #define CTME   0x08                     /* Special Test Mode            */
  80
  81 /* Configuration register 2 entries: */
  82 #define FE     0x40                     /* Features Enable              */
  83 #define SCSI2  0x08                     /* SCSI 2 Enable                */
  84 #define TBPA   0x04                     /* Target Bad Parity Abort      */
  85
  86 /* Configuration register 3 entries: */
  87 #define IDMRC  0x80                     /* ID Message Reserved Check    */
  88 #define QTE    0x40                     /* Queue Tag Enable             */
  89 #define CDB10  0x20                     /* Command Descriptor Block 10  */
  90 #define FSCSI  0x10                     /* FastSCSI                     */
  91 #define FCLK   0x08                     /* FastClock                    */
  92
  93 /* Configuration register 4 entries: */
  94 #define RBS    0x08                     /* Register bank select         */
  95 #define EAN    0x04                     /* Enable Active Negotiation    */
  96
  97 /* Configuration register 5 entries: */
  98 #define LPSR   0x80                     /* Lower Power SCSI Reset       */
  99 #define IE     0x20                     /* Interrupt Enable             */
 100 #define LPM    0x02                     /* Low Power Mode               */
 101 #define WSE0   0x01                     /* 0WS Enable                   */
 102
 103 /* Interrupt register entries: */
 104 #define SRST   0x80                     /* SCSI Reset                   */
 105 #define ILCMD  0x40                     /* Illegal Command              */
 106 #define DIS    0x20                     /* Disconnect                   */
 107 #define BS     0x10                     /* Bus Service                  */
 108 #define FC     0x08                     /* Function Complete            */
 109 #define RESEL  0x04                     /* Reselected                   */
 110 #define SI     0x03                     /* Selection Interrupt          */
 111
 112 /* Status Register Entries: */
 113 #define SCI    0x80                     /* SCSI Core Int                */
 114 #define GE     0x40                     /* Gross Error                  */
 115 #define PE     0x20                     /* Parity Error                 */
 116 #define TC     0x10                     /* Terminal Count               */
 117 #define VGC    0x08                     /* Valid Group Code             */
 118 #define PHBITS 0x07                     /* Phase bits                   */
 119
 120 /* PIO Interrupt Register Entries: */
 121 #define SCI    0x80                     /* SCSI Core Int                */
 122 #define PFI    0x40                     /* PIO FIFO Interrupt           */
 123 #define FULL   0x20                     /* PIO FIFO Full                */
 124 #define EMPTY  0x10                     /* PIO FIFO Empty               */
 125 #define CE     0x08                     /* Collision Error              */
 126 #define OUE    0x04                     /* Overflow / Underflow error   */
 127 #define FIE    0x02                     /* Full Interrupt Enable        */
 128 #define EIE    0x01                     /* Empty Interrupt Enable       */
 129
 130 /* SYM53C416 SCSI phases (lower 3 bits of SYM53C416_STATUS_REG) */
 131 #define PHASE_DATA_OUT    0x00
 132 #define PHASE_DATA_IN     0x01
 133 #define PHASE_COMMAND     0x02
 134 #define PHASE_STATUS      0x03
 135 #define PHASE_RESERVED_1  0x04
 136 #define PHASE_RESERVED_2  0x05
 137 #define PHASE_MESSAGE_OUT 0x06
 138 #define PHASE_MESSAGE_IN  0x07
 139
 140 /* SYM53C416 core commands */
 141 #define NOOP                      0x00
 142 #define FLUSH_FIFO                0x01
 143 #define RESET_CHIP                0x02
 144 #define RESET_SCSI_BUS            0x03
 145 #define DISABLE_SEL_RESEL         0x45
 146 #define RESEL_SEQ                 0x40
 147 #define SEL_WITHOUT_ATN_SEQ       0x41
 148 #define SEL_WITH_ATN_SEQ          0x42
 149 #define SEL_WITH_ATN_AND_STOP_SEQ 0x43
 150 #define ENABLE_SEL_RESEL          0x44
 151 #define SEL_WITH_ATN3_SEQ         0x46
 152 #define RESEL3_SEQ                0x47
 153 #define SND_MSG                   0x20
 154 #define SND_STAT                  0x21
 155 #define SND_DATA                  0x22
 156 #define DISCONNECT_SEQ            0x23
 157 #define TERMINATE_SEQ             0x24
 158 #define TARGET_COMM_COMPLETE_SEQ  0x25
 159 #define DISCONN                   0x27
 160 #define RECV_MSG_SEQ              0x28
 161 #define RECV_CMD                  0x29
 162 #define RECV_DATA                 0x2A
 163 #define RECV_CMD_SEQ              0x2B
 164 #define TARGET_ABORT_PIO          0x04
 165 #define TRANSFER_INFORMATION      0x10
 166 #define INIT_COMM_COMPLETE_SEQ    0x11
 167 #define MSG_ACCEPTED              0x12
 168 #define TRANSFER_PAD              0x18
 169 #define SET_ATN                   0x1A
 170 #define RESET_ATN                 0x1B
 171 #define ILLEGAL                   0xFF
 172
 173 #define PIO_MODE                  0x80
 174
 175 #define IO_RANGE 0x20         /* 0x00 - 0x1F                   */
 176 #define ID       "sym53c416"    /* Attention: copied to the sym53c416.h */
 177 #define PIO_SIZE 128          /* Size of PIO fifo is 128 bytes */
 178
 179 #define READ_TIMEOUT              150
 180 #define WRITE_TIMEOUT             150
 181
 182 #ifdef MODULE
 183
 184 #define sym53c416_base sym53c416
 185 #define sym53c416_base_1 sym53c416_1
 186 #define sym53c416_base_2 sym53c416_2
 187 #define sym53c416_base_3 sym53c416_3
 188
 189 static unsigned int sym53c416_base[2];
 190 static unsigned int sym53c416_base_1[2];
 191 static unsigned int sym53c416_base_2[2];
 192 static unsigned int sym53c416_base_3[2];
 193
 194 #endif
 195
 196 #define MAXHOSTS 4
 197
 198 #define SG_ADDRESS(buffer)     ((char *) sg_virt((buffer)))
 199
 200 enum phases
 201 {
 202         idle,
 203         data_out,
 204         data_in,
 205         command_ph,
 206         status_ph,
 207         message_out,
 208         message_in
 209 };
 210
 211 typedef struct
 212 {
 213         int base;
 214         int irq;
 215         int scsi_id;
 216 } host;
 217
 218 static host hosts[MAXHOSTS] = {
 219                        {0, 0, SYM53C416_SCSI_ID},
 220                        {0, 0, SYM53C416_SCSI_ID},
 221                        {0, 0, SYM53C416_SCSI_ID},
 222                        {0, 0, SYM53C416_SCSI_ID}
 223                        };
 224
 225 static int host_index = 0;
 226 static char info[120];
 227 static Scsi_Cmnd *current_command = NULL;
 228 static int fastpio = 1;
 229
 230 static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
 231
 232 static void sym53c416_set_transfer_counter(int base, unsigned int len)
 233 {
 234         /* Program Transfer Counter */
 235         outb(len & 0x0000FF, base + TC_LOW);
 236         outb((len & 0x00FF00) >> 8, base + TC_MID);
 237         outb((len & 0xFF0000) >> 16, base + TC_HIGH);
 238 }
 239
 240 static DEFINE_SPINLOCK(sym53c416_lock);
 241
 242 /* Returns the number of bytes read */
 243 static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
 244 {
 245         unsigned int orig_len = len;
 246         unsigned long flags = 0;
 247         unsigned int bytes_left;
 248         unsigned long i;
 249         int timeout = READ_TIMEOUT;
 250
 251         /* Do transfer */
 252         spin_lock_irqsave(&sym53c416_lock, flags);
 253         while(len && timeout)
 254         {
 255                 bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
 256                 if(fastpio && bytes_left > 3)
 257                 {
 258                         insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
 259                         buffer += bytes_left & 0xFC;
 260                         len -= bytes_left & 0xFC;
 261                 }
 262                 else if(bytes_left > 0)
 263                 {
 264                         len -= bytes_left;
 265                         for(; bytes_left > 0; bytes_left--)
 266                                 *(buffer++) = inb(base + PIO_FIFO_1);
 267                 }
 268                 else
 269                 {
 270                         i = jiffies + timeout;
 271                         spin_unlock_irqrestore(&sym53c416_lock, flags);
 272                         while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
 273                                 if(inb(base + PIO_INT_REG) & SCI)
 274                                         timeout = 0;
 275                         spin_lock_irqsave(&sym53c416_lock, flags);
 276                         if(inb(base + PIO_INT_REG) & EMPTY)
 277                                 timeout = 0;
 278                 }
 279         }
 280         spin_unlock_irqrestore(&sym53c416_lock, flags);
 281         return orig_len - len;
 282 }
 283
 284 /* Returns the number of bytes written */
 285 static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
 286 {
 287         unsigned int orig_len = len;
 288         unsigned long flags = 0;
 289         unsigned int bufferfree;
 290         unsigned long i;
 291         unsigned int timeout = WRITE_TIMEOUT;
 292
 293         /* Do transfer */
 294         spin_lock_irqsave(&sym53c416_lock, flags);
 295         while(len && timeout)
 296         {
 297                 bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
 298                 if(bufferfree > len)
 299                         bufferfree = len;
 300                 if(fastpio && bufferfree > 3)
 301                 {
 302                         outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
 303                         buffer += bufferfree & 0xFC;
 304                         len -= bufferfree & 0xFC;
 305                 }
 306                 else if(bufferfree > 0)
 307                 {
 308                         len -= bufferfree;
 309                         for(; bufferfree > 0; bufferfree--)
 310                                 outb(*(buffer++), base + PIO_FIFO_1);
 311                 }
 312                 else
 313                 {
 314                         i = jiffies + timeout;
 315                         spin_unlock_irqrestore(&sym53c416_lock, flags);
 316                         while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & FULL) && timeout)
 317                                 ;
 318                         spin_lock_irqsave(&sym53c416_lock, flags);
 319                         if(inb(base + PIO_INT_REG) & FULL)
 320                                 timeout = 0;
 321                 }
 322         }
 323         spin_unlock_irqrestore(&sym53c416_lock, flags);
 324         return orig_len - len;
 325 }
 326
 327 static irqreturn_t sym53c416_intr_handle(int irq, void *dev_id)
 328 {
 329         struct Scsi_Host *dev = dev_id;
 330         int base = dev->io_port;
 331         int i;
 332         unsigned long flags = 0;
 333         unsigned char status_reg, pio_int_reg, int_reg;
 334         struct scatterlist *sg;
 335         unsigned int tot_trans = 0;
 336
 337         spin_lock_irqsave(dev->host_lock,flags);
 338         status_reg = inb(base + STATUS_REG);
 339         pio_int_reg = inb(base + PIO_INT_REG);
 340         int_reg = inb(base + INT_REG);
 341         spin_unlock_irqrestore(dev->host_lock, flags);
 342
 343         /* First, we handle error conditions */
 344         if(int_reg & SCI)         /* SCSI Reset */
 345         {
 346                 printk(KERN_DEBUG "sym53c416: Reset received\n");
 347                 current_command->SCp.phase = idle;
 348                 current_command->result = DID_RESET << 16;
 349                 spin_lock_irqsave(dev->host_lock, flags);
 350                 current_command->scsi_done(current_command);
 351                 spin_unlock_irqrestore(dev->host_lock, flags);
 352                 goto out;
 353         }
 354         if(int_reg & ILCMD)       /* Illegal Command */
 355         {
 356                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
 357                 current_command->SCp.phase = idle;
 358                 current_command->result = DID_ERROR << 16;
 359                 spin_lock_irqsave(dev->host_lock, flags);
 360                 current_command->scsi_done(current_command);
 361                 spin_unlock_irqrestore(dev->host_lock, flags);
 362                 goto out;
 363         }
 364         if(status_reg & GE)         /* Gross Error */
 365         {
 366                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
 367                 current_command->SCp.phase = idle;
 368                 current_command->result = DID_ERROR << 16;
 369                 spin_lock_irqsave(dev->host_lock, flags);
 370                 current_command->scsi_done(current_command);
 371                 spin_unlock_irqrestore(dev->host_lock, flags);
 372                 goto out;
 373         }
 374         if(status_reg & PE)         /* Parity Error */
 375         {
 376                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
 377                 current_command->SCp.phase = idle;
 378                 current_command->result = DID_PARITY << 16;
 379                 spin_lock_irqsave(dev->host_lock, flags);
 380                 current_command->scsi_done(current_command);
 381                 spin_unlock_irqrestore(dev->host_lock, flags);
 382                 goto out;
 383         }
 384         if(pio_int_reg & (CE | OUE))
 385         {
 386                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
 387                 current_command->SCp.phase = idle;
 388                 current_command->result = DID_ERROR << 16;
 389                 spin_lock_irqsave(dev->host_lock, flags);
 390                 current_command->scsi_done(current_command);
 391                 spin_unlock_irqrestore(dev->host_lock, flags);
 392                 goto out;
 393         }
 394         if(int_reg & DIS)           /* Disconnect */
 395         {
 396                 if(current_command->SCp.phase != message_in)
 397                         current_command->result = DID_NO_CONNECT << 16;
 398                 else
 399                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
 400                 current_command->SCp.phase = idle;
 401                 spin_lock_irqsave(dev->host_lock, flags);
 402                 current_command->scsi_done(current_command);
 403                 spin_unlock_irqrestore(dev->host_lock, flags);
 404                 goto out;
 405         }
 406         /* Now we handle SCSI phases         */
 407
 408         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
 409         {
 410                 case PHASE_DATA_OUT:
 411                 {
 412                         if(int_reg & BS)
 413                         {
 414                                 current_command->SCp.phase = data_out;
 415                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 416                                 sym53c416_set_transfer_counter(base,
 417                                                                scsi_bufflen(current_command));
 418                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 419
 420                                 scsi_for_each_sg(current_command,
 421                                                  sg, scsi_sg_count(current_command), i) {
 422                                         tot_trans += sym53c416_write(base,
 423                                                                      SG_ADDRESS(sg),
 424                                                                      sg->length);
 425                                 }
 426                                 if(tot_trans < current_command->underflow)
 427                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 428                         }
 429                         break;
 430                 }
 431
 432                 case PHASE_DATA_IN:
 433                 {
 434                         if(int_reg & BS)
 435                         {
 436                                 current_command->SCp.phase = data_in;
 437                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 438                                 sym53c416_set_transfer_counter(base,
 439                                                                scsi_bufflen(current_command));
 440
 441                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 442
 443                                 scsi_for_each_sg(current_command,
 444                                                  sg, scsi_sg_count(current_command), i) {
 445                                         tot_trans += sym53c416_read(base,
 446                                                                     SG_ADDRESS(sg),
 447                                                                     sg->length);
 448                                 }
 449                                 if(tot_trans < current_command->underflow)
 450                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 451                         }
 452                         break;
 453                 }
 454
 455                 case PHASE_COMMAND:
 456                 {
 457                         current_command->SCp.phase = command_ph;
 458                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
 459                         break;
 460                 }
 461
 462                 case PHASE_STATUS:
 463                 {
 464                         current_command->SCp.phase = status_ph;
 465                         outb(FLUSH_FIFO, base + COMMAND_REG);
 466                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
 467                         break;
 468                 }
 469
 470                 case PHASE_RESERVED_1:
 471                 case PHASE_RESERVED_2:
 472                 {
 473                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
 474                         break;
 475                 }
 476
 477                 case PHASE_MESSAGE_OUT:
 478                 {
 479                         current_command->SCp.phase = message_out;
 480                         outb(SET_ATN, base + COMMAND_REG);
 481                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 482                         break;
 483                 }
 484
 485                 case PHASE_MESSAGE_IN:
 486                 {
 487                         current_command->SCp.phase = message_in;
 488                         current_command->SCp.Status = inb(base + SCSI_FIFO);
 489                         current_command->SCp.Message = inb(base + SCSI_FIFO);
 490                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
 491                                 outb(SET_ATN, base + COMMAND_REG);
 492                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 493                         break;
 494                 }
 495         }
 496 out:
 497         return IRQ_HANDLED;
 498 }
 499
 500 static void sym53c416_init(int base, int scsi_id)
 501 {
 502         outb(RESET_CHIP, base + COMMAND_REG);
 503         outb(NOOP, base + COMMAND_REG);
 504         outb(0x99, base + TOM); /* Time out of 250 ms */
 505         outb(0x05, base + STP);
 506         outb(0x00, base + SYNC_OFFSET);
 507         outb(EPC | scsi_id, base + CONF_REG_1);
 508         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
 509         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
 510         outb(0x83 | EAN, base + CONF_REG_4);
 511         outb(IE | WSE0, base + CONF_REG_5);
 512         outb(0, base + FEATURE_EN);
 513 }
 514
 515 static int sym53c416_probeirq(int base, int scsi_id)
 516 {
 517         int irq, irqs;
 518         unsigned long i;
 519
 520         /* Clear interrupt register */
 521         inb(base + INT_REG);
 522         /* Start probing for irq's */
 523         irqs = probe_irq_on();
 524         /* Reinit chip */
 525         sym53c416_init(base, scsi_id);
 526         /* Cause interrupt */
 527         outb(NOOP, base + COMMAND_REG);
 528         outb(ILLEGAL, base + COMMAND_REG);
 529         outb(0x07, base + DEST_BUS_ID);
 530         outb(0x00, base + DEST_BUS_ID);
 531         /* Wait for interrupt to occur */
 532         i = jiffies + 20;
 533         while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
 534                 barrier();
 535         if(time_before_eq(i, jiffies))  /* timed out */
 536                 return 0;
 537         /* Get occurred irq */
 538         irq = probe_irq_off(irqs);
 539         sym53c416_init(base, scsi_id);
 540         return irq;
 541 }
 542
 543 /* Setup: sym53c416=base,irq */
 544 void sym53c416_setup(char *str, int *ints)
 545 {
 546         int i;
 547
 548         if(host_index >= MAXHOSTS)
 549         {
 550                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
 551                 return;
 552         }
 553         if(ints[0] < 1 || ints[0] > 2)
 554         {
 555                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
 556                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
 557                 return;
 558         }
 559         for(i = 0; i < host_index && i >= 0; i++)
 560                 if(hosts[i].base == ints[1])
 561                         i = -2;
 562         if(i >= 0)
 563         {
 564                 hosts[host_index].base = ints[1];
 565                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
 566                 host_index++;
 567         }
 568 }
 569
 570 static int sym53c416_test(int base)
 571 {
 572         outb(RESET_CHIP, base + COMMAND_REG);
 573         outb(NOOP, base + COMMAND_REG);
 574         if(inb(base + COMMAND_REG) != NOOP)
 575                 return 0;
 576         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
 577                 return 0;
 578         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
 579                 return 0;
 580         return 1;
 581 }
 582
 583
 584 static struct isapnp_device_id id_table[] = {
 585         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 586                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
 587         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 588                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
 589         {       ISAPNP_DEVICE_SINGLE_END }
 590 };
 591
 592 MODULE_DEVICE_TABLE(isapnp, id_table);
 593
 594 static void sym53c416_probe(void)
 595 {
 596         int *base = probeaddrs;
 597         int ints[2];
 598
 599         ints[0] = 1;
 600         for(; *base; base++) {
 601                 if (request_region(*base, IO_RANGE, ID)) {
 602                         if (sym53c416_test(*base)) {
 603                                 ints[1] = *base;
 604                                 sym53c416_setup(NULL, ints);
 605                         }
 606                         release_region(*base, IO_RANGE);
 607                 }
 608         }
 609 }
 610
 611 int __init sym53c416_detect(struct scsi_host_template *tpnt)
 612 {
 613         unsigned long flags;
 614         struct Scsi_Host * shpnt = NULL;
 615         int i;
 616         int count;
 617         struct pnp_dev *idev = NULL;
 618
 619 #ifdef MODULE
 620         int ints[3];
 621
 622         ints[0] = 2;
 623         if(sym53c416_base[0])
 624         {
 625                 ints[1] = sym53c416_base[0];
 626                 ints[2] = sym53c416_base[1];
 627                 sym53c416_setup(NULL, ints);
 628         }
 629         if(sym53c416_base_1[0])
 630         {
 631                 ints[1] = sym53c416_base_1[0];
 632                 ints[2] = sym53c416_base_1[1];
 633                 sym53c416_setup(NULL, ints);
 634         }
 635         if(sym53c416_base_2[0])
 636         {
 637                 ints[1] = sym53c416_base_2[0];
 638                 ints[2] = sym53c416_base_2[1];
 639                 sym53c416_setup(NULL, ints);
 640         }
 641         if(sym53c416_base_3[0])
 642         {
 643                 ints[1] = sym53c416_base_3[0];
 644                 ints[2] = sym53c416_base_3[1];
 645                 sym53c416_setup(NULL, ints);
 646         }
 647 #endif
 648         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
 649
 650         for (i=0; id_table[i].vendor != 0; i++) {
 651                 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
 652                                         id_table[i].function, idev))!=NULL)
 653                 {
 654                         int i[3];
 655
 656                         if(pnp_device_attach(idev)<0)
 657                         {
 658                                 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
 659                                 continue;
 660                         }
 661                         if(pnp_activate_dev(idev) < 0)
 662                         {
 663                                 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
 664                                 pnp_device_detach(idev);
 665                                 continue;
 666
 667                         }
 668
 669                         i[0] = 2;
 670                         i[1] = pnp_port_start(idev, 0);
 671                         i[2] = pnp_irq(idev, 0);
 672
 673                         printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
 674                                 i[1], i[2]);
 675                         sym53c416_setup(NULL, i);
 676                 }
 677         }
 678         sym53c416_probe();
 679
 680         /* Now we register and set up each host adapter found... */
 681         for(count = 0, i = 0; i < host_index; i++) {
 682                 if (!request_region(hosts[i].base, IO_RANGE, ID))
 683                         continue;
 684                 if (!sym53c416_test(hosts[i].base)) {
 685                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
 686                         goto fail_release_region;
 687                 }
 688
 689                 /* We don't have an irq yet, so we should probe for one */
 690                 if (!hosts[i].irq)
 691                         hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
 692                 if (!hosts[i].irq)
 693                         goto fail_release_region;
 694
 695                 shpnt = scsi_register(tpnt, 0);
 696                 if (!shpnt)
 697                         goto fail_release_region;
 698                 /* Request for specified IRQ */
 699                 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
 700                         goto fail_free_host;
 701
 702                 spin_lock_irqsave(&sym53c416_lock, flags);
 703                 shpnt->unique_id = hosts[i].base;
 704                 shpnt->io_port = hosts[i].base;
 705                 shpnt->n_io_port = IO_RANGE;
 706                 shpnt->irq = hosts[i].irq;
 707                 shpnt->this_id = hosts[i].scsi_id;
 708                 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
 709                 count++;
 710                 spin_unlock_irqrestore(&sym53c416_lock, flags);
 711                 continue;
 712
 713  fail_free_host:
 714                 scsi_unregister(shpnt);
 715  fail_release_region:
 716                 release_region(hosts[i].base, IO_RANGE);
 717         }
 718         return count;
 719 }
 720
 721 const char *sym53c416_info(struct Scsi_Host *SChost)
 722 {
 723         int i;
 724         int base = SChost->io_port;
 725         int irq = SChost->irq;
 726         int scsi_id = 0;
 727         int rev = inb(base + TC_HIGH);
 728
 729         for(i = 0; i < host_index; i++)
 730                 if(hosts[i].base == base)
 731                         scsi_id = hosts[i].scsi_id;
 732         sprintf(info, "Symbios Logic 53c416 (rev. %d) at 0x%03x, irq %d, SCSI-ID %d, %s pio", rev, base, irq, scsi_id, (fastpio)? "fast" : "slow");
 733         return info;
 734 }
 735
 736 static int sym53c416_queuecommand_lck(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
 737 {
 738         int base;
 739         unsigned long flags = 0;
 740         int i;
 741
 742         /* Store base register as we can have more than one controller in the system */
 743         base = SCpnt->device->host->io_port;
 744         current_command = SCpnt;                  /* set current command                */
 745         current_command->scsi_done = done;        /* set ptr to done function           */
 746         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
 747         current_command->SCp.Status = 0;
 748         current_command->SCp.Message = 0;
 749
 750         spin_lock_irqsave(&sym53c416_lock, flags);
 751         outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
 752         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
 753         /* Write SCSI command into the SCSI fifo */
 754         for(i = 0; i < SCpnt->cmd_len; i++)
 755                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
 756         /* Start selection sequence */
 757         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
 758         /* Now an interrupt will be generated which we will catch in out interrupt routine */
 759         spin_unlock_irqrestore(&sym53c416_lock, flags);
 760         return 0;
 761 }
 762
 763 DEF_SCSI_QCMD(sym53c416_queuecommand)
 764
 765 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
 766 {
 767         int base;
 768         int scsi_id = -1;
 769         int i;
 770         unsigned long flags;
 771
 772         spin_lock_irqsave(&sym53c416_lock, flags);
 773
 774         /* printk("sym53c416_reset\n"); */
 775         base = SCpnt->device->host->io_port;
 776         /* search scsi_id - fixme, we shouldn't need to iterate for this! */
 777         for(i = 0; i < host_index && scsi_id == -1; i++)
 778                 if(hosts[i].base == base)
 779                         scsi_id = hosts[i].scsi_id;
 780         outb(RESET_CHIP, base + COMMAND_REG);
 781         outb(NOOP | PIO_MODE, base + COMMAND_REG);
 782         outb(RESET_SCSI_BUS, base + COMMAND_REG);
 783         sym53c416_init(base, scsi_id);
 784
 785         spin_unlock_irqrestore(&sym53c416_lock, flags);
 786         return SUCCESS;
 787 }
 788
 789 static int sym53c416_release(struct Scsi_Host *shost)
 790 {
 791         if (shost->irq)
 792                 free_irq(shost->irq, shost);
 793         if (shost->io_port && shost->n_io_port)
 794                 release_region(shost->io_port, shost->n_io_port);
 795         return 0;
 796 }
 797
 798 static int sym53c416_bios_param(struct scsi_device *sdev,
 799                 struct block_device *dev,
 800                 sector_t capacity, int *ip)
 801 {
 802         int size;
 803
 804         size = capacity;
 805         ip[0] = 64;                             /* heads                        */
 806         ip[1] = 32;                             /* sectors                      */
 807         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
 808         {
 809                 ip[0] = 255;                    /* heads                        */
 810                 ip[1] = 63;                     /* sectors                      */
 811                 ip[2] = size / (255 * 63);      /* cylinders                    */
 812         }
 813         return 0;
 814 }
 815
 816 /* Loadable module support */
 817 #ifdef MODULE
 818
 819 MODULE_AUTHOR("Lieven Willems");
 820 MODULE_LICENSE("GPL");
 821
 822 module_param_array(sym53c416, uint, NULL, 0);
 823 module_param_array(sym53c416_1, uint, NULL, 0);
 824 module_param_array(sym53c416_2, uint, NULL, 0);
 825 module_param_array(sym53c416_3, uint, NULL, 0);
 826
 827 #endif
 828
 829 static struct scsi_host_template driver_template = {
 830         .proc_name =            "sym53c416",
 831         .name =                 "Symbios Logic 53c416",
 832         .detect =               sym53c416_detect,
 833         .info =                 sym53c416_info,
 834         .queuecommand =         sym53c416_queuecommand,
 835         .eh_host_reset_handler =sym53c416_host_reset,
 836         .release =              sym53c416_release,
 837         .bios_param =           sym53c416_bios_param,
 838         .can_queue =            1,
 839         .this_id =              SYM53C416_SCSI_ID,
 840         .sg_tablesize =         32,
 841         .cmd_per_lun =          1,
 842         .unchecked_isa_dma =    1,
 843         .use_clustering =       ENABLE_CLUSTERING,
 844 };
 845 #include "scsi_module.c"