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  *
  13  *  LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
  14  *
  15  *  This program is free software; you can redistribute it and/or modify it
  16  *  under the terms of the GNU General Public License as published by the
  17  *  Free Software Foundation; either version 2, or (at your option) any
  18  *  later version.
  19  *
  20  *  This program is distributed in the hope that it will be useful, but
  21  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  *  General Public License for more details.
  24  *
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/types.h>
  30 #include <linux/string.h>
  31 #include <linux/ioport.h>
  32 #include <linux/sched.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/delay.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/spinlock.h>
  37 #include <asm/dma.h>
  38 #include <asm/system.h>
  39 #include <asm/io.h>
  40 #include <linux/blk.h>
  41 #include <linux/version.h>
  42 #include <linux/isapnp.h>
  43 #include "scsi.h"
  44 #include "hosts.h"
  45 #include "sd.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 DEBUG */
 198
 199 /* Macro for debugging purposes */
 200
 201 #ifdef DEBUG
 202 #define DEB(x) x
 203 #else
 204 #define DEB(x)
 205 #endif
 206
 207 #define MAXHOSTS 4
 208
 209 enum phases
 210 {
 211         idle,
 212         data_out,
 213         data_in,
 214         command_ph,
 215         status_ph,
 216         message_out,
 217         message_in
 218 };
 219
 220 typedef struct
 221 {
 222         int base;
 223         int irq;
 224         int scsi_id;
 225 } host;
 226
 227 static host hosts[MAXHOSTS] = {
 228                        {0, 0, SYM53C416_SCSI_ID},
 229                        {0, 0, SYM53C416_SCSI_ID},
 230                        {0, 0, SYM53C416_SCSI_ID},
 231                        {0, 0, SYM53C416_SCSI_ID}
 232                        };
 233
 234 static int host_index = 0;
 235 static char info[120];
 236 static Scsi_Cmnd *current_command = NULL;
 237 static int fastpio = 1;
 238
 239 static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
 240
 241 static void sym53c416_set_transfer_counter(int base, unsigned int len)
 242 {
 243         /* Program Transfer Counter */
 244         outb(len & 0x0000FF, base + TC_LOW);
 245         outb((len & 0x00FF00) >> 8, base + TC_MID);
 246         outb((len & 0xFF0000) >> 16, base + TC_HIGH);
 247 }
 248
 249 /* Returns the number of bytes read */
 250 static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
 251 {
 252         unsigned int orig_len = len;
 253         unsigned long flags = 0;
 254         unsigned int bytes_left;
 255         int i;
 256         int timeout = READ_TIMEOUT;
 257
 258         /* Do transfer */
 259         save_flags(flags);
 260         cli();
 261         while(len && timeout)
 262         {
 263                 bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
 264                 if(fastpio && bytes_left > 3)
 265                 {
 266                         insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
 267                         buffer += bytes_left & 0xFC;
 268                         len -= bytes_left & 0xFC;
 269                 }
 270                 else if(bytes_left > 0)
 271                 {
 272                         len -= bytes_left;
 273                         for(; bytes_left > 0; bytes_left--)
 274                                 *(buffer++) = inb(base + PIO_FIFO_1);
 275                 }
 276                 else
 277                 {
 278                         i = jiffies + timeout;
 279                         restore_flags(flags);
 280                         while(jiffies < i && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
 281                                 if(inb(base + PIO_INT_REG) & SCI)
 282                                         timeout = 0;
 283                         save_flags(flags);
 284                         cli();
 285                         if(inb(base + PIO_INT_REG) & EMPTY)
 286                                 timeout = 0;
 287                 }
 288         }
 289         restore_flags(flags);
 290         return orig_len - len;
 291 }
 292
 293 /* Returns the number of bytes written */
 294 static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
 295 {
 296         unsigned int orig_len = len;
 297         unsigned long flags = 0;
 298         unsigned int bufferfree;
 299         unsigned int i;
 300         unsigned int timeout = WRITE_TIMEOUT;
 301
 302         /* Do transfer */
 303         save_flags(flags);
 304         cli();
 305         while(len && timeout)
 306         {
 307                 bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
 308                 if(bufferfree > len)
 309                         bufferfree = len;
 310                 if(fastpio && bufferfree > 3)
 311                 {
 312                         outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
 313                         buffer += bufferfree & 0xFC;
 314                         len -= bufferfree & 0xFC;
 315                 }
 316                 else if(bufferfree > 0)
 317                 {
 318                         len -= bufferfree;
 319                         for(; bufferfree > 0; bufferfree--)
 320                                 outb(*(buffer++), base + PIO_FIFO_1);
 321                 }
 322                 else
 323                 {
 324                         i = jiffies + timeout;
 325                         restore_flags(flags);
 326                         while(jiffies < i && (inb(base + PIO_INT_REG) & FULL) && timeout)
 327                                 ;
 328                         save_flags(flags);
 329                         cli();
 330                         if(inb(base + PIO_INT_REG) & FULL)
 331                                 timeout = 0;
 332                 }
 333         }
 334         restore_flags(flags);
 335         return orig_len - len;
 336 }
 337
 338 static void sym53c416_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
 339 {
 340         int base = 0;
 341         int i;
 342         unsigned long flags = 0;
 343         unsigned char status_reg, pio_int_reg, int_reg;
 344         struct scatterlist *sglist;
 345         unsigned int sgcount;
 346         unsigned int tot_trans = 0;
 347
 348         /* We search the base address of the host adapter which caused the interrupt */
 349         /* FIXME: should pass dev_id sensibly as hosts[i] */
 350         for(i = 0; i < host_index && !base; i++)
 351                 if(irq == hosts[i].irq)
 352                         base = hosts[i].base;
 353         /* If no adapter found, we cannot handle the interrupt. Leave a message */
 354         /* and continue. This should never happen...                            */
 355         if(!base)
 356         {
 357                 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
 358                 return;
 359         }
 360         /* Now we have the base address and we can start handling the interrupt */
 361
 362         spin_lock_irqsave(&io_request_lock,flags);
 363         status_reg = inb(base + STATUS_REG);
 364         pio_int_reg = inb(base + PIO_INT_REG);
 365         int_reg = inb(base + INT_REG);
 366         spin_unlock_irqrestore(&io_request_lock, flags);
 367
 368         /* First, we handle error conditions */
 369         if(int_reg & SCI)         /* SCSI Reset */
 370         {
 371                 printk(KERN_DEBUG "sym53c416: Reset received\n");
 372                 current_command->SCp.phase = idle;
 373                 current_command->result = DID_RESET << 16;
 374                 spin_lock_irqsave(&io_request_lock, flags);
 375                 current_command->scsi_done(current_command);
 376                 spin_unlock_irqrestore(&io_request_lock, flags);
 377                 return;
 378         }
 379         if(int_reg & ILCMD)       /* Illegal Command */
 380         {
 381                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
 382                 current_command->SCp.phase = idle;
 383                 current_command->result = DID_ERROR << 16;
 384                 spin_lock_irqsave(&io_request_lock, flags);
 385                 current_command->scsi_done(current_command);
 386                 spin_unlock_irqrestore(&io_request_lock, flags);
 387                 return;
 388         }
 389         if(status_reg & GE)         /* Gross Error */
 390         {
 391                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
 392                 current_command->SCp.phase = idle;
 393                 current_command->result = DID_ERROR << 16;
 394                 spin_lock_irqsave(&io_request_lock, flags);
 395                 current_command->scsi_done(current_command);
 396                 spin_unlock_irqrestore(&io_request_lock, flags);
 397                 return;
 398         }
 399         if(status_reg & PE)         /* Parity Error */
 400         {
 401                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
 402                 current_command->SCp.phase = idle;
 403                 current_command->result = DID_PARITY << 16;
 404                 spin_lock_irqsave(&io_request_lock, flags);
 405                 current_command->scsi_done(current_command);
 406                 spin_unlock_irqrestore(&io_request_lock, flags);
 407                 return;
 408         }
 409         if(pio_int_reg & (CE | OUE))
 410         {
 411                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
 412                 current_command->SCp.phase = idle;
 413                 current_command->result = DID_ERROR << 16;
 414                 spin_lock_irqsave(&io_request_lock, flags);
 415                 current_command->scsi_done(current_command);
 416                 spin_unlock_irqrestore(&io_request_lock, flags);
 417                 return;
 418         }
 419         if(int_reg & DIS)           /* Disconnect */
 420         {
 421                 if(current_command->SCp.phase != message_in)
 422                         current_command->result = DID_NO_CONNECT << 16;
 423                 else
 424                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
 425                 current_command->SCp.phase = idle;
 426                 spin_lock_irqsave(&io_request_lock, flags);
 427                 current_command->scsi_done(current_command);
 428                 spin_unlock_irqrestore(&io_request_lock, flags);
 429                 return;
 430         }
 431         /* Now we handle SCSI phases         */
 432
 433         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
 434         {
 435                 case PHASE_DATA_OUT:
 436                 {
 437                         if(int_reg & BS)
 438                         {
 439                                 current_command->SCp.phase = data_out;
 440                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 441                                 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
 442                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 443                                 if(!current_command->use_sg)
 444                                         tot_trans = sym53c416_write(base, current_command->request_buffer, current_command->request_bufflen);
 445                                 else
 446                                 {
 447                                         sgcount = current_command->use_sg;
 448                                         sglist = current_command->request_buffer;
 449                                         while(sgcount--)
 450                                         {
 451                                                 tot_trans += sym53c416_write(base, sglist->address, sglist->length);
 452                                                 sglist++;
 453                                         }
 454                                 }
 455                                 if(tot_trans < current_command->underflow)
 456                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 457                         }
 458                         break;
 459                 }
 460
 461                 case PHASE_DATA_IN:
 462                 {
 463                         if(int_reg & BS)
 464                         {
 465                                 current_command->SCp.phase = data_in;
 466                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 467                                 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
 468                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 469                                 if(!current_command->use_sg)
 470                                         tot_trans = sym53c416_read(base, current_command->request_buffer, current_command->request_bufflen);
 471                                 else
 472                                 {
 473                                         sgcount = current_command->use_sg;
 474                                         sglist = current_command->request_buffer;
 475                                         while(sgcount--)
 476                                         {
 477                                                 tot_trans += sym53c416_read(base, sglist->address, sglist->length);
 478                                                 sglist++;
 479                                         }
 480                                 }
 481                                 if(tot_trans < current_command->underflow)
 482                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 483                         }
 484                         break;
 485                 }
 486
 487                 case PHASE_COMMAND:
 488                 {
 489                         current_command->SCp.phase = command_ph;
 490                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
 491                         break;
 492                 }
 493
 494                 case PHASE_STATUS:
 495                 {
 496                         current_command->SCp.phase = status_ph;
 497                         outb(FLUSH_FIFO, base + COMMAND_REG);
 498                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
 499                         break;
 500                 }
 501
 502                 case PHASE_RESERVED_1:
 503                 case PHASE_RESERVED_2:
 504                 {
 505                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
 506                         break;
 507                 }
 508
 509                 case PHASE_MESSAGE_OUT:
 510                 {
 511                         current_command->SCp.phase = message_out;
 512                         outb(SET_ATN, base + COMMAND_REG);
 513                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 514                         break;
 515                 }
 516
 517                 case PHASE_MESSAGE_IN:
 518                 {
 519                         current_command->SCp.phase = message_in;
 520                         current_command->SCp.Status = inb(base + SCSI_FIFO);
 521                         current_command->SCp.Message = inb(base + SCSI_FIFO);
 522                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
 523                                 outb(SET_ATN, base + COMMAND_REG);
 524                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 525                         break;
 526                 }
 527         }
 528 }
 529
 530 static void sym53c416_init(int base, int scsi_id)
 531 {
 532         outb(RESET_CHIP, base + COMMAND_REG);
 533         outb(NOOP, base + COMMAND_REG);
 534         outb(0x99, base + TOM); /* Time out of 250 ms */
 535         outb(0x05, base + STP);
 536         outb(0x00, base + SYNC_OFFSET);
 537         outb(EPC | scsi_id, base + CONF_REG_1);
 538         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
 539         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
 540         outb(0x83 | EAN, base + CONF_REG_4);
 541         outb(IE | WSE0, base + CONF_REG_5);
 542         outb(0, base + FEATURE_EN);
 543 }
 544
 545 static int sym53c416_probeirq(int base, int scsi_id)
 546 {
 547         int irq, irqs, i;
 548
 549         /* Clear interrupt register */
 550         inb(base + INT_REG);
 551         /* Start probing for irq's */
 552         irqs = probe_irq_on();
 553         /* Reinit chip */
 554         sym53c416_init(base, scsi_id);
 555         /* Cause interrupt */
 556         outb(NOOP, base + COMMAND_REG);
 557         outb(ILLEGAL, base + COMMAND_REG);
 558         outb(0x07, base + DEST_BUS_ID);
 559         outb(0x00, base + DEST_BUS_ID);
 560         /* Wait for interrupt to occur */
 561         i = jiffies + 20;
 562         while(i > jiffies && !(inb(base + STATUS_REG) & SCI))
 563                 barrier();
 564         if(i <= jiffies) /* timed out */
 565                 return 0;
 566         /* Get occurred irq */
 567         irq = probe_irq_off(irqs);
 568         sym53c416_init(base, scsi_id);
 569         return irq;
 570 }
 571
 572 /* Setup: sym53c416=base,irq */
 573 void sym53c416_setup(char *str, int *ints)
 574 {
 575         int i;
 576
 577         if(host_index >= MAXHOSTS)
 578         {
 579                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
 580                 return;
 581         }
 582         if(ints[0] < 1 || ints[0] > 2)
 583         {
 584                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
 585                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
 586                 return;
 587         }
 588         for(i = 0; i < host_index && i >= 0; i++)
 589                 if(hosts[i].base == ints[1])
 590                         i = -2;
 591         if(i >= 0)
 592         {
 593                 hosts[host_index].base = ints[1];
 594                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
 595                 host_index++;
 596         }
 597 }
 598
 599 static int sym53c416_test(int base)
 600 {
 601         outb(RESET_CHIP, base + COMMAND_REG);
 602         outb(NOOP, base + COMMAND_REG);
 603         if(inb(base + COMMAND_REG) != NOOP)
 604                 return 0;
 605         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
 606                 return 0;
 607         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
 608                 return 0;
 609         return 1;
 610 }
 611
 612
 613 static struct isapnp_device_id id_table[] = {
 614         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 615                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
 616         {0}
 617 };
 618
 619 MODULE_DEVICE_TABLE(isapnp, id_table);
 620
 621 void sym53c416_probe(void)
 622 {
 623         int *base = probeaddrs;
 624         int ints[2];
 625
 626         ints[0] = 1;
 627         for(; *base; base++)
 628         {
 629                 if(!check_region(*base, IO_RANGE) && sym53c416_test(*base))
 630                 {
 631                         ints[1] = *base;
 632                         sym53c416_setup(NULL, ints);
 633                 }
 634         }
 635 }
 636
 637 int sym53c416_detect(Scsi_Host_Template *tpnt)
 638 {
 639         unsigned long flags;
 640         struct Scsi_Host * shpnt = NULL;
 641         int i;
 642         int count;
 643         struct pci_dev *idev = NULL;
 644
 645 #ifdef MODULE
 646         int ints[3];
 647
 648         ints[0] = 2;
 649         if(sym53c416_base)
 650         {
 651                 ints[1] = sym53c416_base[0];
 652                 ints[2] = sym53c416_base[1];
 653                 sym53c416_setup(NULL, ints);
 654         }
 655         if(sym53c416_base_1)
 656         {
 657                 ints[1] = sym53c416_base_1[0];
 658                 ints[2] = sym53c416_base_1[1];
 659                 sym53c416_setup(NULL, ints);
 660         }
 661         if(sym53c416_base_2)
 662         {
 663                 ints[1] = sym53c416_base_2[0];
 664                 ints[2] = sym53c416_base_2[1];
 665                 sym53c416_setup(NULL, ints);
 666         }
 667         if(sym53c416_base_3)
 668         {
 669                 ints[1] = sym53c416_base_3[0];
 670                 ints[2] = sym53c416_base_3[1];
 671                 sym53c416_setup(NULL, ints);
 672         }
 673 #endif
 674         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
 675
 676         while((idev=isapnp_find_dev(NULL, ISAPNP_VENDOR('S','L','I'),
 677                                 ISAPNP_FUNCTION(0x4163), idev))!=NULL)
 678         {
 679                 int i[3];
 680
 681                 if(idev->prepare(idev)<0)
 682                 {
 683                         printk(KERN_WARNING "sym53c416: unable to prepare PnP card.\n");
 684                         continue;
 685                 }
 686                 if(idev->activate(idev)<0)
 687                 {
 688                         printk(KERN_WARNING "sym53c416: unable to activate PnP card.\n");
 689                         continue;
 690                 }
 691
 692                 i[0] = 2;
 693                 i[1] = idev->resource[0].start;
 694                 i[2] = idev->irq_resource[0].start;
 695
 696                 printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
 697                         i[1], i[2]);
 698                 sym53c416_setup(NULL, i);
 699         }
 700         sym53c416_probe();
 701
 702         /* Now we register and set up each host adapter found... */
 703         for(count = 0, i = 0; i < host_index; i++)
 704         {
 705                 if(!sym53c416_test(hosts[i].base))
 706                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
 707                 else
 708                 {
 709                         if(hosts[i].irq == 0)
 710                         /* We don't have an irq yet, so we should probe for one */
 711                                 if((hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id)) == 0)
 712                                         printk(KERN_WARNING "IRQ autoprobing failed for sym53c416 at address 0x%03x\n", hosts[i].base);
 713                         if(hosts[i].irq && !check_region(hosts[i].base, IO_RANGE))
 714                         {
 715                                 shpnt = scsi_register(tpnt, 0);
 716                                 if(shpnt==NULL)
 717                                         continue;
 718                                 save_flags(flags);
 719                                 cli();
 720                                 /* FIXME: Request_irq with CLI is not safe */
 721                                 /* Request for specified IRQ */
 722                                 if(request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, NULL))
 723                                 {
 724                                         restore_flags(flags);
 725                                         printk(KERN_ERR "sym53c416: Unable to assign IRQ %d\n", hosts[i].irq);
 726                                         scsi_unregister(shpnt);
 727                                 }
 728                                 else
 729                                 {
 730                                         /* Inform the kernel of our IO range */
 731                                         request_region(hosts[i].base, IO_RANGE, ID);
 732                                         shpnt->unique_id = hosts[i].base;
 733                                         shpnt->io_port = hosts[i].base;
 734                                         shpnt->n_io_port = IO_RANGE;
 735                                         shpnt->irq = hosts[i].irq;
 736                                         shpnt->this_id = hosts[i].scsi_id;
 737                                         sym53c416_init(hosts[i].base, hosts[i].scsi_id);
 738                                         count++;
 739                                         restore_flags(flags);
 740                                 }
 741                         }
 742                 }
 743         }
 744         return count;
 745 }
 746
 747 const char *sym53c416_info(struct Scsi_Host *SChost)
 748 {
 749         int i;
 750         int base = SChost->io_port;
 751         int irq = SChost->irq;
 752         int scsi_id = 0;
 753         int rev = inb(base + TC_HIGH);
 754
 755         for(i = 0; i < host_index; i++)
 756                 if(hosts[i].base == base)
 757                         scsi_id = hosts[i].scsi_id;
 758         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");
 759         return info;
 760 }
 761
 762 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
 763 {
 764         int base;
 765         unsigned long flags = 0;
 766         int i;
 767
 768         /* Store base register as we can have more than one controller in the system */
 769         base = SCpnt->host->io_port;
 770         current_command = SCpnt;                  /* set current command                */
 771         current_command->scsi_done = done;        /* set ptr to done function           */
 772         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
 773         current_command->SCp.Status = 0;
 774         current_command->SCp.Message = 0;
 775
 776         save_flags(flags);
 777         cli();
 778         outb(SCpnt->target, base + DEST_BUS_ID); /* Set scsi id target        */
 779         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
 780         /* Write SCSI command into the SCSI fifo */
 781         for(i = 0; i < SCpnt->cmd_len; i++)
 782                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
 783         /* Start selection sequence */
 784         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
 785         /* Now an interrupt will be generated which we will catch in out interrupt routine */
 786         restore_flags(flags);
 787         return 0;
 788 }
 789
 790 static void internal_done(Scsi_Cmnd *SCpnt)
 791 {
 792         SCpnt->SCp.Status++;
 793 }
 794
 795 static int sym53c416_command(Scsi_Cmnd *SCpnt)
 796 {
 797         sym53c416_queuecommand(SCpnt, internal_done);
 798         SCpnt->SCp.Status = 0;
 799         while(!SCpnt->SCp.Status)
 800                 barrier();
 801         return SCpnt->result;
 802 }
 803
 804 static int sym53c416_abort(Scsi_Cmnd *SCpnt)
 805 {
 806         //printk("sym53c416_abort\n");
 807         /* We don't know how to abort for the moment */
 808         return SCSI_ABORT_SNOOZE;
 809 }
 810
 811 static int sym53c416_reset(Scsi_Cmnd *SCpnt, unsigned int reset_flags)
 812 {
 813         int base;
 814         int scsi_id = -1;
 815         int i;
 816
 817         //printk("sym53c416_reset\n");
 818         base = SCpnt->host->io_port;
 819         /* search scsi_id */
 820         for(i = 0; i < host_index && scsi_id != -1; i++)
 821                 if(hosts[i].base == base)
 822                         scsi_id = hosts[i].scsi_id;
 823         outb(RESET_CHIP, base + COMMAND_REG);
 824         outb(NOOP | PIO_MODE, base + COMMAND_REG);
 825         outb(RESET_SCSI_BUS, base + COMMAND_REG);
 826         sym53c416_init(base, scsi_id);
 827         return SCSI_RESET_PENDING;
 828 }
 829
 830 static int sym53c416_bios_param(Disk *disk, kdev_t dev, int *ip)
 831 {
 832         int size;
 833
 834         size = disk->capacity;
 835         ip[0] = 64;                             /* heads                        */
 836         ip[1] = 32;                             /* sectors                      */
 837         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
 838         {
 839                 ip[0] = 255;                    /* heads                        */
 840                 ip[1] = 63;                     /* sectors                      */
 841                 ip[2] = size / (255 * 63);      /* cylinders                    */
 842         }
 843         return 0;
 844 }
 845
 846 /* Loadable module support */
 847 #ifdef MODULE
 848
 849 MODULE_AUTHOR("Lieven Willems");
 850 MODULE_LICENSE("GPL");
 851
 852 MODULE_PARM(sym53c416, "1-2i");
 853 MODULE_PARM(sym53c416_1, "1-2i");
 854 MODULE_PARM(sym53c416_2, "1-2i");
 855 MODULE_PARM(sym53c416_3, "1-2i");
 856
 857 #endif
 858
 859 static Scsi_Host_Template driver_template = SYM53C416;
 860
 861 #include "scsi_module.c"