linux/drivers/scsi/sym53c416.c
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   1/*
   2 *  sym53c416.c
   3 *  Low-level SCSI driver for sym53c416 chip.
   4 *  Copyright (C) 1998 Lieven Willems (lw_linux@hotmail.com)
   5 * 
   6 *  Changes : 
   7 * 
   8 *  Marcelo Tosatti <marcelo@conectiva.com.br> : Added io_request_lock locking
   9 *  Alan Cox <alan@lxorguk.ukuu.org.uk> : Cleaned up code formatting
  10 *                               Fixed an irq locking bug
  11 *                               Added ISAPnP support
  12 *  Bjoern A. Zeeb <bzeeb@zabbadoz.net> : Initial irq locking updates
  13 *                                        Added another card with ISAPnP support
  14 * 
  15 *  LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
  16 *
  17 *  This program is free software; you can redistribute it and/or modify it
  18 *  under the terms of the GNU General Public License as published by the
  19 *  Free Software Foundation; either version 2, or (at your option) any
  20 *  later version.
  21 *
  22 *  This program is distributed in the hope that it will be useful, but
  23 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  24 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25 *  General Public License for more details.
  26 *
  27 */
  28
  29#include <linux/module.h>
  30#include <linux/kernel.h>
  31#include <linux/types.h>
  32#include <linux/init.h>
  33#include <linux/string.h>
  34#include <linux/ioport.h>
  35#include <linux/interrupt.h>
  36#include <linux/delay.h>
  37#include <linux/proc_fs.h>
  38#include <linux/spinlock.h>
  39#include <asm/dma.h>
  40#include <asm/io.h>
  41#include <linux/blkdev.h>
  42#include <linux/isapnp.h>
  43#include "scsi.h"
  44#include <scsi/scsi_host.h>
  45#include "sym53c416.h"
  46
  47#define VERSION_STRING        "Version 1.0.0-ac"
  48
  49#define TC_LOW       0x00     /* Transfer counter low        */
  50#define TC_MID       0x01     /* Transfer counter mid        */
  51#define SCSI_FIFO    0x02     /* SCSI FIFO register          */
  52#define COMMAND_REG  0x03     /* Command Register            */
  53#define STATUS_REG   0x04     /* Status Register (READ)      */
  54#define DEST_BUS_ID  0x04     /* Destination Bus ID (WRITE)  */
  55#define INT_REG      0x05     /* Interrupt Register (READ)   */
  56#define TOM          0x05     /* Time out multiplier (WRITE) */
  57#define STP          0x06     /* Synchronous Transfer period */
  58#define SYNC_OFFSET  0x07     /* Synchronous Offset          */
  59#define CONF_REG_1   0x08     /* Configuration register 1    */
  60#define CONF_REG_2   0x0B     /* Configuration register 2    */
  61#define CONF_REG_3   0x0C     /* Configuration register 3    */
  62#define CONF_REG_4   0x0D     /* Configuration register 4    */
  63#define TC_HIGH      0x0E     /* Transfer counter high       */
  64#define PIO_FIFO_1   0x10     /* PIO FIFO register 1         */
  65#define PIO_FIFO_2   0x11     /* PIO FIFO register 2         */
  66#define PIO_FIFO_3   0x12     /* PIO FIFO register 3         */
  67#define PIO_FIFO_4   0x13     /* PIO FIFO register 4         */
  68#define PIO_FIFO_CNT 0x14     /* PIO FIFO count              */
  69#define PIO_INT_REG  0x15     /* PIO interrupt register      */
  70#define CONF_REG_5   0x16     /* Configuration register 5    */
  71#define FEATURE_EN   0x1D     /* Feature Enable register     */
  72
  73/* Configuration register 1 entries: */
  74/* Bits 2-0: SCSI ID of host adapter */
  75#define SCM    0x80                     /* Slow Cable Mode              */
  76#define SRID   0x40                     /* SCSI Reset Interrupt Disable */
  77#define PTM    0x20                     /* Parity Test Mode             */
  78#define EPC    0x10                     /* Enable Parity Checking       */
  79#define CTME   0x08                     /* Special Test Mode            */
  80
  81/* Configuration register 2 entries: */
  82#define FE     0x40                     /* Features Enable              */
  83#define SCSI2  0x08                     /* SCSI 2 Enable                */
  84#define TBPA   0x04                     /* Target Bad Parity Abort      */
  85
  86/* Configuration register 3 entries: */
  87#define IDMRC  0x80                     /* ID Message Reserved Check    */
  88#define QTE    0x40                     /* Queue Tag Enable             */
  89#define CDB10  0x20                     /* Command Descriptor Block 10  */
  90#define FSCSI  0x10                     /* FastSCSI                     */
  91#define FCLK   0x08                     /* FastClock                    */
  92
  93/* Configuration register 4 entries: */
  94#define RBS    0x08                     /* Register bank select         */
  95#define EAN    0x04                     /* Enable Active Negotiation    */
  96
  97/* Configuration register 5 entries: */
  98#define LPSR   0x80                     /* Lower Power SCSI Reset       */
  99#define IE     0x20                     /* Interrupt Enable             */
 100#define LPM    0x02                     /* Low Power Mode               */
 101#define WSE0   0x01                     /* 0WS Enable                   */
 102
 103/* Interrupt register entries: */
 104#define SRST   0x80                     /* SCSI Reset                   */
 105#define ILCMD  0x40                     /* Illegal Command              */
 106#define DIS    0x20                     /* Disconnect                   */
 107#define BS     0x10                     /* Bus Service                  */
 108#define FC     0x08                     /* Function Complete            */
 109#define RESEL  0x04                     /* Reselected                   */
 110#define SI     0x03                     /* Selection Interrupt          */
 111
 112/* Status Register Entries: */
 113#define SCI    0x80                     /* SCSI Core Int                */
 114#define GE     0x40                     /* Gross Error                  */
 115#define PE     0x20                     /* Parity Error                 */
 116#define TC     0x10                     /* Terminal Count               */
 117#define VGC    0x08                     /* Valid Group Code             */
 118#define PHBITS 0x07                     /* Phase bits                   */
 119
 120/* PIO Interrupt Register Entries: */
 121#define SCI    0x80                     /* SCSI Core Int                */
 122#define PFI    0x40                     /* PIO FIFO Interrupt           */
 123#define FULL   0x20                     /* PIO FIFO Full                */
 124#define EMPTY  0x10                     /* PIO FIFO Empty               */
 125#define CE     0x08                     /* Collision Error              */
 126#define OUE    0x04                     /* Overflow / Underflow error   */
 127#define FIE    0x02                     /* Full Interrupt Enable        */
 128#define EIE    0x01                     /* Empty Interrupt Enable       */
 129
 130/* SYM53C416 SCSI phases (lower 3 bits of SYM53C416_STATUS_REG) */
 131#define PHASE_DATA_OUT    0x00
 132#define PHASE_DATA_IN     0x01
 133#define PHASE_COMMAND     0x02
 134#define PHASE_STATUS      0x03
 135#define PHASE_RESERVED_1  0x04
 136#define PHASE_RESERVED_2  0x05
 137#define PHASE_MESSAGE_OUT 0x06
 138#define PHASE_MESSAGE_IN  0x07
 139
 140/* SYM53C416 core commands */
 141#define NOOP                      0x00
 142#define FLUSH_FIFO                0x01
 143#define RESET_CHIP                0x02
 144#define RESET_SCSI_BUS            0x03
 145#define DISABLE_SEL_RESEL         0x45
 146#define RESEL_SEQ                 0x40
 147#define SEL_WITHOUT_ATN_SEQ       0x41
 148#define SEL_WITH_ATN_SEQ          0x42
 149#define SEL_WITH_ATN_AND_STOP_SEQ 0x43
 150#define ENABLE_SEL_RESEL          0x44
 151#define SEL_WITH_ATN3_SEQ         0x46
 152#define RESEL3_SEQ                0x47
 153#define SND_MSG                   0x20
 154#define SND_STAT                  0x21
 155#define SND_DATA                  0x22
 156#define DISCONNECT_SEQ            0x23
 157#define TERMINATE_SEQ             0x24
 158#define TARGET_COMM_COMPLETE_SEQ  0x25
 159#define DISCONN                   0x27
 160#define RECV_MSG_SEQ              0x28
 161#define RECV_CMD                  0x29
 162#define RECV_DATA                 0x2A
 163#define RECV_CMD_SEQ              0x2B
 164#define TARGET_ABORT_PIO          0x04
 165#define TRANSFER_INFORMATION      0x10
 166#define INIT_COMM_COMPLETE_SEQ    0x11
 167#define MSG_ACCEPTED              0x12
 168#define TRANSFER_PAD              0x18
 169#define SET_ATN                   0x1A
 170#define RESET_ATN                 0x1B
 171#define ILLEGAL                   0xFF
 172
 173#define PIO_MODE                  0x80
 174
 175#define IO_RANGE 0x20         /* 0x00 - 0x1F                   */
 176#define ID       "sym53c416"    /* Attention: copied to the sym53c416.h */
 177#define PIO_SIZE 128          /* Size of PIO fifo is 128 bytes */
 178
 179#define READ_TIMEOUT              150
 180#define WRITE_TIMEOUT             150
 181
 182#ifdef MODULE
 183
 184#define sym53c416_base sym53c416
 185#define sym53c416_base_1 sym53c416_1
 186#define sym53c416_base_2 sym53c416_2
 187#define sym53c416_base_3 sym53c416_3
 188
 189static unsigned int sym53c416_base[2];
 190static unsigned int sym53c416_base_1[2];
 191static unsigned int sym53c416_base_2[2];
 192static unsigned int sym53c416_base_3[2];
 193
 194#endif
 195
 196#define MAXHOSTS 4
 197
 198#define SG_ADDRESS(buffer)     ((char *) sg_virt((buffer)))
 199
 200enum phases
 201{
 202        idle,
 203        data_out,
 204        data_in,
 205        command_ph,
 206        status_ph,
 207        message_out,
 208        message_in
 209};
 210
 211typedef struct
 212{
 213        int base;
 214        int irq;
 215        int scsi_id;
 216} host;
 217
 218static host hosts[MAXHOSTS] = {
 219                       {0, 0, SYM53C416_SCSI_ID},
 220                       {0, 0, SYM53C416_SCSI_ID},
 221                       {0, 0, SYM53C416_SCSI_ID},
 222                       {0, 0, SYM53C416_SCSI_ID}
 223                       };
 224
 225static int host_index = 0;
 226static char info[120];
 227static Scsi_Cmnd *current_command = NULL;
 228static int fastpio = 1;
 229
 230static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
 231
 232static void sym53c416_set_transfer_counter(int base, unsigned int len)
 233{
 234        /* Program Transfer Counter */
 235        outb(len & 0x0000FF, base + TC_LOW);
 236        outb((len & 0x00FF00) >> 8, base + TC_MID);
 237        outb((len & 0xFF0000) >> 16, base + TC_HIGH);
 238}
 239
 240static DEFINE_SPINLOCK(sym53c416_lock);
 241
 242/* Returns the number of bytes read */
 243static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
 244{
 245        unsigned int orig_len = len;
 246        unsigned long flags = 0;
 247        unsigned int bytes_left;
 248        unsigned long i;
 249        int timeout = READ_TIMEOUT;
 250
 251        /* Do transfer */
 252        spin_lock_irqsave(&sym53c416_lock, flags);
 253        while(len && timeout)
 254        {
 255                bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
 256                if(fastpio && bytes_left > 3)
 257                {
 258                        insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
 259                        buffer += bytes_left & 0xFC;
 260                        len -= bytes_left & 0xFC;
 261                }
 262                else if(bytes_left > 0)
 263                {
 264                        len -= bytes_left;
 265                        for(; bytes_left > 0; bytes_left--)
 266                                *(buffer++) = inb(base + PIO_FIFO_1);
 267                }
 268                else
 269                {
 270                        i = jiffies + timeout;
 271                        spin_unlock_irqrestore(&sym53c416_lock, flags);
 272                        while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
 273                                if(inb(base + PIO_INT_REG) & SCI)
 274                                        timeout = 0;
 275                        spin_lock_irqsave(&sym53c416_lock, flags);
 276                        if(inb(base + PIO_INT_REG) & EMPTY)
 277                                timeout = 0;
 278                }
 279        }
 280        spin_unlock_irqrestore(&sym53c416_lock, flags);
 281        return orig_len - len;
 282}
 283
 284/* Returns the number of bytes written */
 285static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
 286{
 287        unsigned int orig_len = len;
 288        unsigned long flags = 0;
 289        unsigned int bufferfree;
 290        unsigned long i;
 291        unsigned int timeout = WRITE_TIMEOUT;
 292
 293        /* Do transfer */
 294        spin_lock_irqsave(&sym53c416_lock, flags);
 295        while(len && timeout)
 296        {
 297                bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
 298                if(bufferfree > len)
 299                        bufferfree = len;
 300                if(fastpio && bufferfree > 3)
 301                {
 302                        outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
 303                        buffer += bufferfree & 0xFC;
 304                        len -= bufferfree & 0xFC;
 305                }
 306                else if(bufferfree > 0)
 307                {
 308                        len -= bufferfree;
 309                        for(; bufferfree > 0; bufferfree--)
 310                                outb(*(buffer++), base + PIO_FIFO_1);
 311                }
 312                else
 313                {
 314                        i = jiffies + timeout;
 315                        spin_unlock_irqrestore(&sym53c416_lock, flags);
 316                        while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & FULL) && timeout)
 317                                ;
 318                        spin_lock_irqsave(&sym53c416_lock, flags);
 319                        if(inb(base + PIO_INT_REG) & FULL)
 320                                timeout = 0;
 321                }
 322        }
 323        spin_unlock_irqrestore(&sym53c416_lock, flags);
 324        return orig_len - len;
 325}
 326
 327static irqreturn_t sym53c416_intr_handle(int irq, void *dev_id)
 328{
 329        struct Scsi_Host *dev = dev_id;
 330        int base = dev->io_port;
 331        int i;
 332        unsigned long flags = 0;
 333        unsigned char status_reg, pio_int_reg, int_reg;
 334        struct scatterlist *sg;
 335        unsigned int tot_trans = 0;
 336
 337        spin_lock_irqsave(dev->host_lock,flags);
 338        status_reg = inb(base + STATUS_REG);
 339        pio_int_reg = inb(base + PIO_INT_REG);
 340        int_reg = inb(base + INT_REG);
 341        spin_unlock_irqrestore(dev->host_lock, flags);
 342
 343        /* First, we handle error conditions */
 344        if(int_reg & SCI)         /* SCSI Reset */
 345        {
 346                printk(KERN_DEBUG "sym53c416: Reset received\n");
 347                current_command->SCp.phase = idle;
 348                current_command->result = DID_RESET << 16;
 349                spin_lock_irqsave(dev->host_lock, flags);
 350                current_command->scsi_done(current_command);
 351                spin_unlock_irqrestore(dev->host_lock, flags);
 352                goto out;
 353        }
 354        if(int_reg & ILCMD)       /* Illegal Command */
 355        {
 356                printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
 357                current_command->SCp.phase = idle;
 358                current_command->result = DID_ERROR << 16;
 359                spin_lock_irqsave(dev->host_lock, flags);
 360                current_command->scsi_done(current_command);
 361                spin_unlock_irqrestore(dev->host_lock, flags);
 362                goto out;
 363        }
 364        if(status_reg & GE)         /* Gross Error */
 365        {
 366                printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
 367                current_command->SCp.phase = idle;
 368                current_command->result = DID_ERROR << 16;
 369                spin_lock_irqsave(dev->host_lock, flags);
 370                current_command->scsi_done(current_command);
 371                spin_unlock_irqrestore(dev->host_lock, flags);
 372                goto out;
 373        }
 374        if(status_reg & PE)         /* Parity Error */
 375        {
 376                printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
 377                current_command->SCp.phase = idle;
 378                current_command->result = DID_PARITY << 16;
 379                spin_lock_irqsave(dev->host_lock, flags);
 380                current_command->scsi_done(current_command);
 381                spin_unlock_irqrestore(dev->host_lock, flags);
 382                goto out;
 383        }
 384        if(pio_int_reg & (CE | OUE))
 385        {
 386                printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
 387                current_command->SCp.phase = idle;
 388                current_command->result = DID_ERROR << 16;
 389                spin_lock_irqsave(dev->host_lock, flags);
 390                current_command->scsi_done(current_command);
 391                spin_unlock_irqrestore(dev->host_lock, flags);
 392                goto out;
 393        }
 394        if(int_reg & DIS)           /* Disconnect */
 395        {
 396                if(current_command->SCp.phase != message_in)
 397                        current_command->result = DID_NO_CONNECT << 16;
 398                else
 399                        current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
 400                current_command->SCp.phase = idle;
 401                spin_lock_irqsave(dev->host_lock, flags);
 402                current_command->scsi_done(current_command);
 403                spin_unlock_irqrestore(dev->host_lock, flags);
 404                goto out;
 405        }
 406        /* Now we handle SCSI phases         */
 407
 408        switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
 409        {
 410                case PHASE_DATA_OUT:
 411                {
 412                        if(int_reg & BS)
 413                        {
 414                                current_command->SCp.phase = data_out;
 415                                outb(FLUSH_FIFO, base + COMMAND_REG);
 416                                sym53c416_set_transfer_counter(base,
 417                                                               scsi_bufflen(current_command));
 418                                outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 419
 420                                scsi_for_each_sg(current_command,
 421                                                 sg, scsi_sg_count(current_command), i) {
 422                                        tot_trans += sym53c416_write(base,
 423                                                                     SG_ADDRESS(sg),
 424                                                                     sg->length);
 425                                }
 426                                if(tot_trans < current_command->underflow)
 427                                        printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 428                        }
 429                        break;
 430                }
 431
 432                case PHASE_DATA_IN:
 433                {
 434                        if(int_reg & BS)
 435                        {
 436                                current_command->SCp.phase = data_in;
 437                                outb(FLUSH_FIFO, base + COMMAND_REG);
 438                                sym53c416_set_transfer_counter(base,
 439                                                               scsi_bufflen(current_command));
 440
 441                                outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 442
 443                                scsi_for_each_sg(current_command,
 444                                                 sg, scsi_sg_count(current_command), i) {
 445                                        tot_trans += sym53c416_read(base,
 446                                                                    SG_ADDRESS(sg),
 447                                                                    sg->length);
 448                                }
 449                                if(tot_trans < current_command->underflow)
 450                                        printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 451                        }
 452                        break;
 453                }
 454
 455                case PHASE_COMMAND:
 456                {
 457                        current_command->SCp.phase = command_ph;
 458                        printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
 459                        break;
 460                }
 461
 462                case PHASE_STATUS:
 463                {
 464                        current_command->SCp.phase = status_ph;
 465                        outb(FLUSH_FIFO, base + COMMAND_REG);
 466                        outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
 467                        break;
 468                }
 469                
 470                case PHASE_RESERVED_1:
 471                case PHASE_RESERVED_2:
 472                {
 473                        printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
 474                        break;
 475                }
 476
 477                case PHASE_MESSAGE_OUT:
 478                {
 479                        current_command->SCp.phase = message_out;
 480                        outb(SET_ATN, base + COMMAND_REG);
 481                        outb(MSG_ACCEPTED, base + COMMAND_REG);
 482                        break;
 483                }
 484
 485                case PHASE_MESSAGE_IN:
 486                {
 487                        current_command->SCp.phase = message_in;
 488                        current_command->SCp.Status = inb(base + SCSI_FIFO);
 489                        current_command->SCp.Message = inb(base + SCSI_FIFO);
 490                        if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
 491                                outb(SET_ATN, base + COMMAND_REG);
 492                        outb(MSG_ACCEPTED, base + COMMAND_REG);
 493                        break;
 494                }
 495        }
 496out:
 497        return IRQ_HANDLED;
 498}
 499
 500static void sym53c416_init(int base, int scsi_id)
 501{
 502        outb(RESET_CHIP, base + COMMAND_REG);
 503        outb(NOOP, base + COMMAND_REG);
 504        outb(0x99, base + TOM); /* Time out of 250 ms */
 505        outb(0x05, base + STP);
 506        outb(0x00, base + SYNC_OFFSET);
 507        outb(EPC | scsi_id, base + CONF_REG_1);
 508        outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
 509        outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
 510        outb(0x83 | EAN, base + CONF_REG_4);
 511        outb(IE | WSE0, base + CONF_REG_5);
 512        outb(0, base + FEATURE_EN);
 513}
 514
 515static int sym53c416_probeirq(int base, int scsi_id)
 516{
 517        int irq, irqs;
 518        unsigned long i;
 519
 520        /* Clear interrupt register */
 521        inb(base + INT_REG);
 522        /* Start probing for irq's */
 523        irqs = probe_irq_on();
 524        /* Reinit chip */
 525        sym53c416_init(base, scsi_id);
 526        /* Cause interrupt */
 527        outb(NOOP, base + COMMAND_REG);
 528        outb(ILLEGAL, base + COMMAND_REG);
 529        outb(0x07, base + DEST_BUS_ID);
 530        outb(0x00, base + DEST_BUS_ID);
 531        /* Wait for interrupt to occur */
 532        i = jiffies + 20;
 533        while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
 534                barrier();
 535        if(time_before_eq(i, jiffies))  /* timed out */
 536                return 0;
 537        /* Get occurred irq */
 538        irq = probe_irq_off(irqs);
 539        sym53c416_init(base, scsi_id);
 540        return irq;
 541}
 542
 543/* Setup: sym53c416=base,irq */
 544void sym53c416_setup(char *str, int *ints)
 545{
 546        int i;
 547
 548        if(host_index >= MAXHOSTS)
 549        {
 550                printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
 551                return;
 552        }
 553        if(ints[0] < 1 || ints[0] > 2)
 554        {
 555                printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
 556                printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
 557                return;
 558        }
 559        for(i = 0; i < host_index && i >= 0; i++)
 560                if(hosts[i].base == ints[1])
 561                        i = -2;
 562        if(i >= 0)
 563        {
 564                hosts[host_index].base = ints[1];
 565                hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
 566                host_index++;
 567        }
 568}
 569
 570static int sym53c416_test(int base)
 571{
 572        outb(RESET_CHIP, base + COMMAND_REG);
 573        outb(NOOP, base + COMMAND_REG);
 574        if(inb(base + COMMAND_REG) != NOOP)
 575                return 0;
 576        if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
 577                return 0;
 578        if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
 579                return 0;
 580        return 1;
 581}
 582
 583
 584static struct isapnp_device_id id_table[] = {
 585        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 586                ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
 587        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 588                ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
 589        {       ISAPNP_DEVICE_SINGLE_END }
 590};
 591
 592MODULE_DEVICE_TABLE(isapnp, id_table);
 593
 594static void sym53c416_probe(void)
 595{
 596        int *base = probeaddrs;
 597        int ints[2];
 598
 599        ints[0] = 1;
 600        for(; *base; base++) {
 601                if (request_region(*base, IO_RANGE, ID)) {
 602                        if (sym53c416_test(*base)) {
 603                                ints[1] = *base;
 604                                sym53c416_setup(NULL, ints);
 605                        }
 606                        release_region(*base, IO_RANGE);
 607                }
 608        }
 609}
 610
 611int __init sym53c416_detect(struct scsi_host_template *tpnt)
 612{
 613        unsigned long flags;
 614        struct Scsi_Host * shpnt = NULL;
 615        int i;
 616        int count;
 617        struct pnp_dev *idev = NULL;
 618        
 619#ifdef MODULE
 620        int ints[3];
 621
 622        ints[0] = 2;
 623        if(sym53c416_base[0])
 624        {
 625                ints[1] = sym53c416_base[0];
 626                ints[2] = sym53c416_base[1];
 627                sym53c416_setup(NULL, ints);
 628        }
 629        if(sym53c416_base_1[0])
 630        {
 631                ints[1] = sym53c416_base_1[0];
 632                ints[2] = sym53c416_base_1[1];
 633                sym53c416_setup(NULL, ints);
 634        }
 635        if(sym53c416_base_2[0])
 636        {
 637                ints[1] = sym53c416_base_2[0];
 638                ints[2] = sym53c416_base_2[1];
 639                sym53c416_setup(NULL, ints);
 640        }
 641        if(sym53c416_base_3[0])
 642        {
 643                ints[1] = sym53c416_base_3[0];
 644                ints[2] = sym53c416_base_3[1];
 645                sym53c416_setup(NULL, ints);
 646        }
 647#endif
 648        printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
 649
 650        for (i=0; id_table[i].vendor != 0; i++) {
 651                while((idev=pnp_find_dev(NULL, id_table[i].vendor,
 652                                        id_table[i].function, idev))!=NULL)
 653                {
 654                        int i[3];
 655
 656                        if(pnp_device_attach(idev)<0)
 657                        {
 658                                printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
 659                                continue;
 660                        }
 661                        if(pnp_activate_dev(idev) < 0)
 662                        {
 663                                printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
 664                                pnp_device_detach(idev);
 665                                continue;
 666                        
 667                        }
 668
 669                        i[0] = 2;
 670                        i[1] = pnp_port_start(idev, 0);
 671                        i[2] = pnp_irq(idev, 0);
 672
 673                        printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
 674                                i[1], i[2]);
 675                        sym53c416_setup(NULL, i);
 676                }
 677        }
 678        sym53c416_probe();
 679
 680        /* Now we register and set up each host adapter found... */
 681        for(count = 0, i = 0; i < host_index; i++) {
 682                if (!request_region(hosts[i].base, IO_RANGE, ID))
 683                        continue;
 684                if (!sym53c416_test(hosts[i].base)) {
 685                        printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
 686                        goto fail_release_region;
 687                }
 688
 689                /* We don't have an irq yet, so we should probe for one */
 690                if (!hosts[i].irq)
 691                        hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
 692                if (!hosts[i].irq)
 693                        goto fail_release_region;
 694        
 695                shpnt = scsi_register(tpnt, 0);
 696                if (!shpnt)
 697                        goto fail_release_region;
 698                /* Request for specified IRQ */
 699                if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
 700                        goto fail_free_host;
 701
 702                spin_lock_irqsave(&sym53c416_lock, flags);
 703                shpnt->unique_id = hosts[i].base;
 704                shpnt->io_port = hosts[i].base;
 705                shpnt->n_io_port = IO_RANGE;
 706                shpnt->irq = hosts[i].irq;
 707                shpnt->this_id = hosts[i].scsi_id;
 708                sym53c416_init(hosts[i].base, hosts[i].scsi_id);
 709                count++;
 710                spin_unlock_irqrestore(&sym53c416_lock, flags);
 711                continue;
 712
 713 fail_free_host:
 714                scsi_unregister(shpnt);
 715 fail_release_region:
 716                release_region(hosts[i].base, IO_RANGE);
 717        }
 718        return count;
 719}
 720
 721const char *sym53c416_info(struct Scsi_Host *SChost)
 722{
 723        int i;
 724        int base = SChost->io_port;
 725        int irq = SChost->irq;
 726        int scsi_id = 0;
 727        int rev = inb(base + TC_HIGH);
 728
 729        for(i = 0; i < host_index; i++)
 730                if(hosts[i].base == base)
 731                        scsi_id = hosts[i].scsi_id;
 732        sprintf(info, "Symbios Logic 53c416 (rev. %d) at 0x%03x, irq %d, SCSI-ID %d, %s pio", rev, base, irq, scsi_id, (fastpio)? "fast" : "slow");
 733        return info;
 734}
 735
 736static int sym53c416_queuecommand_lck(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
 737{
 738        int base;
 739        unsigned long flags = 0;
 740        int i;
 741
 742        /* Store base register as we can have more than one controller in the system */
 743        base = SCpnt->device->host->io_port;
 744        current_command = SCpnt;                  /* set current command                */
 745        current_command->scsi_done = done;        /* set ptr to done function           */
 746        current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
 747        current_command->SCp.Status = 0;
 748        current_command->SCp.Message = 0;
 749
 750        spin_lock_irqsave(&sym53c416_lock, flags);
 751        outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
 752        outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
 753        /* Write SCSI command into the SCSI fifo */
 754        for(i = 0; i < SCpnt->cmd_len; i++)
 755                outb(SCpnt->cmnd[i], base + SCSI_FIFO);
 756        /* Start selection sequence */
 757        outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
 758        /* Now an interrupt will be generated which we will catch in out interrupt routine */
 759        spin_unlock_irqrestore(&sym53c416_lock, flags);
 760        return 0;
 761}
 762
 763DEF_SCSI_QCMD(sym53c416_queuecommand)
 764
 765static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
 766{
 767        int base;
 768        int scsi_id = -1;       
 769        int i;
 770        unsigned long flags;
 771
 772        spin_lock_irqsave(&sym53c416_lock, flags);
 773
 774        /* printk("sym53c416_reset\n"); */
 775        base = SCpnt->device->host->io_port;
 776        /* search scsi_id - fixme, we shouldn't need to iterate for this! */
 777        for(i = 0; i < host_index && scsi_id == -1; i++)
 778                if(hosts[i].base == base)
 779                        scsi_id = hosts[i].scsi_id;
 780        outb(RESET_CHIP, base + COMMAND_REG);
 781        outb(NOOP | PIO_MODE, base + COMMAND_REG);
 782        outb(RESET_SCSI_BUS, base + COMMAND_REG);
 783        sym53c416_init(base, scsi_id);
 784
 785        spin_unlock_irqrestore(&sym53c416_lock, flags);
 786        return SUCCESS;
 787}
 788
 789static int sym53c416_release(struct Scsi_Host *shost)
 790{
 791        if (shost->irq)
 792                free_irq(shost->irq, shost);
 793        if (shost->io_port && shost->n_io_port)
 794                release_region(shost->io_port, shost->n_io_port);
 795        return 0;
 796}
 797
 798static int sym53c416_bios_param(struct scsi_device *sdev,
 799                struct block_device *dev,
 800                sector_t capacity, int *ip)
 801{
 802        int size;
 803
 804        size = capacity;
 805        ip[0] = 64;                             /* heads                        */
 806        ip[1] = 32;                             /* sectors                      */
 807        if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
 808        {
 809                ip[0] = 255;                    /* heads                        */
 810                ip[1] = 63;                     /* sectors                      */
 811                ip[2] = size / (255 * 63);      /* cylinders                    */
 812        }
 813        return 0;
 814}
 815
 816/* Loadable module support */
 817#ifdef MODULE
 818
 819MODULE_AUTHOR("Lieven Willems");
 820MODULE_LICENSE("GPL");
 821
 822module_param_array(sym53c416, uint, NULL, 0);
 823module_param_array(sym53c416_1, uint, NULL, 0);
 824module_param_array(sym53c416_2, uint, NULL, 0);
 825module_param_array(sym53c416_3, uint, NULL, 0);
 826
 827#endif
 828
 829static struct scsi_host_template driver_template = {
 830        .proc_name =            "sym53c416",
 831        .name =                 "Symbios Logic 53c416",
 832        .detect =               sym53c416_detect,
 833        .info =                 sym53c416_info, 
 834        .queuecommand =         sym53c416_queuecommand,
 835        .eh_host_reset_handler =sym53c416_host_reset,
 836        .release =              sym53c416_release,
 837        .bios_param =           sym53c416_bios_param,
 838        .can_queue =            1,
 839        .this_id =              SYM53C416_SCSI_ID,
 840        .sg_tablesize =         32,
 841        .cmd_per_lun =          1,
 842        .unchecked_isa_dma =    1,
 843        .use_clustering =       ENABLE_CLUSTERING,
 844};
 845#include "scsi_module.c"
 846
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