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