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@redhat.com> : 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] = {0,0};
 191 static unsigned int sym53c416_base_1[2] = {0,0};
 192 static unsigned int sym53c416_base_2[2] = {0,0};
 193 static unsigned int sym53c416_base_3[2] = {0,0};
 194
 195 #endif
 196
 197 #define MAXHOSTS 4
 198
 199 #define SG_ADDRESS(buffer)     ((char *) (page_address((buffer)->page)+(buffer)->offset))
 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 = 0;
 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         /* We search the base address of the host adapter which caused the interrupt */
 339         /* FIXME: should pass dev_id sensibly as hosts[i] */
 340         for(i = 0; i < host_index && !base; i++)
 341                 if(irq == hosts[i].irq)
 342                         base = hosts[i].base;
 343         /* If no adapter found, we cannot handle the interrupt. Leave a message */
 344         /* and continue. This should never happen...                            */
 345         if(!base)
 346         {
 347                 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
 348                 return IRQ_NONE;
 349         }
 350         /* Now we have the base address and we can start handling the interrupt */
 351
 352         spin_lock_irqsave(dev->host_lock,flags);
 353         status_reg = inb(base + STATUS_REG);
 354         pio_int_reg = inb(base + PIO_INT_REG);
 355         int_reg = inb(base + INT_REG);
 356         spin_unlock_irqrestore(dev->host_lock, flags);
 357
 358         /* First, we handle error conditions */
 359         if(int_reg & SCI)         /* SCSI Reset */
 360         {
 361                 printk(KERN_DEBUG "sym53c416: Reset received\n");
 362                 current_command->SCp.phase = idle;
 363                 current_command->result = DID_RESET << 16;
 364                 spin_lock_irqsave(dev->host_lock, flags);
 365                 current_command->scsi_done(current_command);
 366                 spin_unlock_irqrestore(dev->host_lock, flags);
 367                 goto out;
 368         }
 369         if(int_reg & ILCMD)       /* Illegal Command */
 370         {
 371                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
 372                 current_command->SCp.phase = idle;
 373                 current_command->result = DID_ERROR << 16;
 374                 spin_lock_irqsave(dev->host_lock, flags);
 375                 current_command->scsi_done(current_command);
 376                 spin_unlock_irqrestore(dev->host_lock, flags);
 377                 goto out;
 378         }
 379         if(status_reg & GE)         /* Gross Error */
 380         {
 381                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
 382                 current_command->SCp.phase = idle;
 383                 current_command->result = DID_ERROR << 16;
 384                 spin_lock_irqsave(dev->host_lock, flags);
 385                 current_command->scsi_done(current_command);
 386                 spin_unlock_irqrestore(dev->host_lock, flags);
 387                 goto out;
 388         }
 389         if(status_reg & PE)         /* Parity Error */
 390         {
 391                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
 392                 current_command->SCp.phase = idle;
 393                 current_command->result = DID_PARITY << 16;
 394                 spin_lock_irqsave(dev->host_lock, flags);
 395                 current_command->scsi_done(current_command);
 396                 spin_unlock_irqrestore(dev->host_lock, flags);
 397                 goto out;
 398         }
 399         if(pio_int_reg & (CE | OUE))
 400         {
 401                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
 402                 current_command->SCp.phase = idle;
 403                 current_command->result = DID_ERROR << 16;
 404                 spin_lock_irqsave(dev->host_lock, flags);
 405                 current_command->scsi_done(current_command);
 406                 spin_unlock_irqrestore(dev->host_lock, flags);
 407                 goto out;
 408         }
 409         if(int_reg & DIS)           /* Disconnect */
 410         {
 411                 if(current_command->SCp.phase != message_in)
 412                         current_command->result = DID_NO_CONNECT << 16;
 413                 else
 414                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
 415                 current_command->SCp.phase = idle;
 416                 spin_lock_irqsave(dev->host_lock, flags);
 417                 current_command->scsi_done(current_command);
 418                 spin_unlock_irqrestore(dev->host_lock, flags);
 419                 goto out;
 420         }
 421         /* Now we handle SCSI phases         */
 422
 423         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
 424         {
 425                 case PHASE_DATA_OUT:
 426                 {
 427                         if(int_reg & BS)
 428                         {
 429                                 current_command->SCp.phase = data_out;
 430                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 431                                 sym53c416_set_transfer_counter(base,
 432                                                                scsi_bufflen(current_command));
 433                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 434
 435                                 scsi_for_each_sg(current_command,
 436                                                  sg, scsi_sg_count(current_command), i) {
 437                                         tot_trans += sym53c416_write(base,
 438                                                                      SG_ADDRESS(sg),
 439                                                                      sg->length);
 440                                 }
 441                                 if(tot_trans < current_command->underflow)
 442                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 443                         }
 444                         break;
 445                 }
 446
 447                 case PHASE_DATA_IN:
 448                 {
 449                         if(int_reg & BS)
 450                         {
 451                                 current_command->SCp.phase = data_in;
 452                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 453                                 sym53c416_set_transfer_counter(base,
 454                                                                scsi_bufflen(current_command));
 455
 456                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 457
 458                                 scsi_for_each_sg(current_command,
 459                                                  sg, scsi_sg_count(current_command), i) {
 460                                         tot_trans += sym53c416_read(base,
 461                                                                     SG_ADDRESS(sg),
 462                                                                     sg->length);
 463                                 }
 464                                 if(tot_trans < current_command->underflow)
 465                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 466                         }
 467                         break;
 468                 }
 469
 470                 case PHASE_COMMAND:
 471                 {
 472                         current_command->SCp.phase = command_ph;
 473                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
 474                         break;
 475                 }
 476
 477                 case PHASE_STATUS:
 478                 {
 479                         current_command->SCp.phase = status_ph;
 480                         outb(FLUSH_FIFO, base + COMMAND_REG);
 481                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
 482                         break;
 483                 }
 484
 485                 case PHASE_RESERVED_1:
 486                 case PHASE_RESERVED_2:
 487                 {
 488                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
 489                         break;
 490                 }
 491
 492                 case PHASE_MESSAGE_OUT:
 493                 {
 494                         current_command->SCp.phase = message_out;
 495                         outb(SET_ATN, base + COMMAND_REG);
 496                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 497                         break;
 498                 }
 499
 500                 case PHASE_MESSAGE_IN:
 501                 {
 502                         current_command->SCp.phase = message_in;
 503                         current_command->SCp.Status = inb(base + SCSI_FIFO);
 504                         current_command->SCp.Message = inb(base + SCSI_FIFO);
 505                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
 506                                 outb(SET_ATN, base + COMMAND_REG);
 507                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 508                         break;
 509                 }
 510         }
 511 out:
 512         return IRQ_HANDLED;
 513 }
 514
 515 static void sym53c416_init(int base, int scsi_id)
 516 {
 517         outb(RESET_CHIP, base + COMMAND_REG);
 518         outb(NOOP, base + COMMAND_REG);
 519         outb(0x99, base + TOM); /* Time out of 250 ms */
 520         outb(0x05, base + STP);
 521         outb(0x00, base + SYNC_OFFSET);
 522         outb(EPC | scsi_id, base + CONF_REG_1);
 523         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
 524         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
 525         outb(0x83 | EAN, base + CONF_REG_4);
 526         outb(IE | WSE0, base + CONF_REG_5);
 527         outb(0, base + FEATURE_EN);
 528 }
 529
 530 static int sym53c416_probeirq(int base, int scsi_id)
 531 {
 532         int irq, irqs;
 533         unsigned long i;
 534
 535         /* Clear interrupt register */
 536         inb(base + INT_REG);
 537         /* Start probing for irq's */
 538         irqs = probe_irq_on();
 539         /* Reinit chip */
 540         sym53c416_init(base, scsi_id);
 541         /* Cause interrupt */
 542         outb(NOOP, base + COMMAND_REG);
 543         outb(ILLEGAL, base + COMMAND_REG);
 544         outb(0x07, base + DEST_BUS_ID);
 545         outb(0x00, base + DEST_BUS_ID);
 546         /* Wait for interrupt to occur */
 547         i = jiffies + 20;
 548         while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
 549                 barrier();
 550         if(time_before_eq(i, jiffies))  /* timed out */
 551                 return 0;
 552         /* Get occurred irq */
 553         irq = probe_irq_off(irqs);
 554         sym53c416_init(base, scsi_id);
 555         return irq;
 556 }
 557
 558 /* Setup: sym53c416=base,irq */
 559 void sym53c416_setup(char *str, int *ints)
 560 {
 561         int i;
 562
 563         if(host_index >= MAXHOSTS)
 564         {
 565                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
 566                 return;
 567         }
 568         if(ints[0] < 1 || ints[0] > 2)
 569         {
 570                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
 571                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
 572                 return;
 573         }
 574         for(i = 0; i < host_index && i >= 0; i++)
 575                 if(hosts[i].base == ints[1])
 576                         i = -2;
 577         if(i >= 0)
 578         {
 579                 hosts[host_index].base = ints[1];
 580                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
 581                 host_index++;
 582         }
 583 }
 584
 585 static int sym53c416_test(int base)
 586 {
 587         outb(RESET_CHIP, base + COMMAND_REG);
 588         outb(NOOP, base + COMMAND_REG);
 589         if(inb(base + COMMAND_REG) != NOOP)
 590                 return 0;
 591         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
 592                 return 0;
 593         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
 594                 return 0;
 595         return 1;
 596 }
 597
 598
 599 static struct isapnp_device_id id_table[] __devinitdata = {
 600         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 601                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
 602         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 603                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
 604         {       ISAPNP_DEVICE_SINGLE_END }
 605 };
 606
 607 MODULE_DEVICE_TABLE(isapnp, id_table);
 608
 609 static void sym53c416_probe(void)
 610 {
 611         int *base = probeaddrs;
 612         int ints[2];
 613
 614         ints[0] = 1;
 615         for(; *base; base++) {
 616                 if (request_region(*base, IO_RANGE, ID)) {
 617                         if (sym53c416_test(*base)) {
 618                                 ints[1] = *base;
 619                                 sym53c416_setup(NULL, ints);
 620                         }
 621                         release_region(*base, IO_RANGE);
 622                 }
 623         }
 624 }
 625
 626 int __init sym53c416_detect(struct scsi_host_template *tpnt)
 627 {
 628         unsigned long flags;
 629         struct Scsi_Host * shpnt = NULL;
 630         int i;
 631         int count;
 632         struct pnp_dev *idev = NULL;
 633
 634 #ifdef MODULE
 635         int ints[3];
 636
 637         ints[0] = 2;
 638         if(sym53c416_base)
 639         {
 640                 ints[1] = sym53c416_base[0];
 641                 ints[2] = sym53c416_base[1];
 642                 sym53c416_setup(NULL, ints);
 643         }
 644         if(sym53c416_base_1)
 645         {
 646                 ints[1] = sym53c416_base_1[0];
 647                 ints[2] = sym53c416_base_1[1];
 648                 sym53c416_setup(NULL, ints);
 649         }
 650         if(sym53c416_base_2)
 651         {
 652                 ints[1] = sym53c416_base_2[0];
 653                 ints[2] = sym53c416_base_2[1];
 654                 sym53c416_setup(NULL, ints);
 655         }
 656         if(sym53c416_base_3)
 657         {
 658                 ints[1] = sym53c416_base_3[0];
 659                 ints[2] = sym53c416_base_3[1];
 660                 sym53c416_setup(NULL, ints);
 661         }
 662 #endif
 663         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
 664
 665         for (i=0; id_table[i].vendor != 0; i++) {
 666                 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
 667                                         id_table[i].function, idev))!=NULL)
 668                 {
 669                         int i[3];
 670
 671                         if(pnp_device_attach(idev)<0)
 672                         {
 673                                 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
 674                                 continue;
 675                         }
 676                         if(pnp_activate_dev(idev) < 0)
 677                         {
 678                                 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
 679                                 pnp_device_detach(idev);
 680                                 continue;
 681
 682                         }
 683
 684                         i[0] = 2;
 685                         i[1] = pnp_port_start(idev, 0);
 686                         i[2] = pnp_irq(idev, 0);
 687
 688                         printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
 689                                 i[1], i[2]);
 690                         sym53c416_setup(NULL, i);
 691                 }
 692         }
 693         sym53c416_probe();
 694
 695         /* Now we register and set up each host adapter found... */
 696         for(count = 0, i = 0; i < host_index; i++) {
 697                 if (!request_region(hosts[i].base, IO_RANGE, ID))
 698                         continue;
 699                 if (!sym53c416_test(hosts[i].base)) {
 700                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
 701                         goto fail_release_region;
 702                 }
 703
 704                 /* We don't have an irq yet, so we should probe for one */
 705                 if (!hosts[i].irq)
 706                         hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
 707                 if (!hosts[i].irq)
 708                         goto fail_release_region;
 709
 710                 shpnt = scsi_register(tpnt, 0);
 711                 if (!shpnt)
 712                         goto fail_release_region;
 713                 /* Request for specified IRQ */
 714                 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
 715                         goto fail_free_host;
 716
 717                 spin_lock_irqsave(&sym53c416_lock, flags);
 718                 shpnt->unique_id = hosts[i].base;
 719                 shpnt->io_port = hosts[i].base;
 720                 shpnt->n_io_port = IO_RANGE;
 721                 shpnt->irq = hosts[i].irq;
 722                 shpnt->this_id = hosts[i].scsi_id;
 723                 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
 724                 count++;
 725                 spin_unlock_irqrestore(&sym53c416_lock, flags);
 726                 continue;
 727
 728  fail_free_host:
 729                 scsi_unregister(shpnt);
 730  fail_release_region:
 731                 release_region(hosts[i].base, IO_RANGE);
 732         }
 733         return count;
 734 }
 735
 736 const char *sym53c416_info(struct Scsi_Host *SChost)
 737 {
 738         int i;
 739         int base = SChost->io_port;
 740         int irq = SChost->irq;
 741         int scsi_id = 0;
 742         int rev = inb(base + TC_HIGH);
 743
 744         for(i = 0; i < host_index; i++)
 745                 if(hosts[i].base == base)
 746                         scsi_id = hosts[i].scsi_id;
 747         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");
 748         return info;
 749 }
 750
 751 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
 752 {
 753         int base;
 754         unsigned long flags = 0;
 755         int i;
 756
 757         /* Store base register as we can have more than one controller in the system */
 758         base = SCpnt->device->host->io_port;
 759         current_command = SCpnt;                  /* set current command                */
 760         current_command->scsi_done = done;        /* set ptr to done function           */
 761         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
 762         current_command->SCp.Status = 0;
 763         current_command->SCp.Message = 0;
 764
 765         spin_lock_irqsave(&sym53c416_lock, flags);
 766         outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
 767         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
 768         /* Write SCSI command into the SCSI fifo */
 769         for(i = 0; i < SCpnt->cmd_len; i++)
 770                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
 771         /* Start selection sequence */
 772         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
 773         /* Now an interrupt will be generated which we will catch in out interrupt routine */
 774         spin_unlock_irqrestore(&sym53c416_lock, flags);
 775         return 0;
 776 }
 777
 778 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
 779 {
 780         int base;
 781         int scsi_id = -1;
 782         int i;
 783         unsigned long flags;
 784
 785         spin_lock_irqsave(&sym53c416_lock, flags);
 786
 787         /* printk("sym53c416_reset\n"); */
 788         base = SCpnt->device->host->io_port;
 789         /* search scsi_id - fixme, we shouldnt need to iterate for this! */
 790         for(i = 0; i < host_index && scsi_id == -1; i++)
 791                 if(hosts[i].base == base)
 792                         scsi_id = hosts[i].scsi_id;
 793         outb(RESET_CHIP, base + COMMAND_REG);
 794         outb(NOOP | PIO_MODE, base + COMMAND_REG);
 795         outb(RESET_SCSI_BUS, base + COMMAND_REG);
 796         sym53c416_init(base, scsi_id);
 797
 798         spin_unlock_irqrestore(&sym53c416_lock, flags);
 799         return SUCCESS;
 800 }
 801
 802 static int sym53c416_release(struct Scsi_Host *shost)
 803 {
 804         if (shost->irq)
 805                 free_irq(shost->irq, shost);
 806         if (shost->io_port && shost->n_io_port)
 807                 release_region(shost->io_port, shost->n_io_port);
 808         return 0;
 809 }
 810
 811 static int sym53c416_bios_param(struct scsi_device *sdev,
 812                 struct block_device *dev,
 813                 sector_t capacity, int *ip)
 814 {
 815         int size;
 816
 817         size = capacity;
 818         ip[0] = 64;                             /* heads                        */
 819         ip[1] = 32;                             /* sectors                      */
 820         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
 821         {
 822                 ip[0] = 255;                    /* heads                        */
 823                 ip[1] = 63;                     /* sectors                      */
 824                 ip[2] = size / (255 * 63);      /* cylinders                    */
 825         }
 826         return 0;
 827 }
 828
 829 /* Loadable module support */
 830 #ifdef MODULE
 831
 832 MODULE_AUTHOR("Lieven Willems");
 833 MODULE_LICENSE("GPL");
 834
 835 module_param_array(sym53c416, uint, NULL, 0);
 836 module_param_array(sym53c416_1, uint, NULL, 0);
 837 module_param_array(sym53c416_2, uint, NULL, 0);
 838 module_param_array(sym53c416_3, uint, NULL, 0);
 839
 840 #endif
 841
 842 static struct scsi_host_template driver_template = {
 843         .proc_name =            "sym53c416",
 844         .name =                 "Symbios Logic 53c416",
 845         .detect =               sym53c416_detect,
 846         .info =                 sym53c416_info,
 847         .queuecommand =         sym53c416_queuecommand,
 848         .eh_host_reset_handler =sym53c416_host_reset,
 849         .release =              sym53c416_release,
 850         .bios_param =           sym53c416_bios_param,
 851         .can_queue =            1,
 852         .this_id =              SYM53C416_SCSI_ID,
 853         .sg_tablesize =         32,
 854         .cmd_per_lun =          1,
 855         .unchecked_isa_dma =    1,
 856         .use_clustering =       ENABLE_CLUSTERING,
 857 };
 858 #include "scsi_module.c"