LXR linux/drivers/scsi/sym53c416.c

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