drivers/scsi/sym53c416.c

   1 /*
   2  *  sym53c416.c
   3  *  Low-level SCSI driver for sym53c416 chip.
   4  *  Copyright (C) 1998 Lieven Willems (lw_linux@hotmail.com)
   5  *
   6  *  Changes :
   7  *
   8  *  Marcelo Tosatti <marcelo@conectiva.com.br> : Added io_request_lock locking
   9  *  Alan Cox <alan@redhat.com> : Cleaned up code formatting
  10  *                               Fixed an irq locking bug
  11  *                               Added ISAPnP support
  12  *  Bjoern A. Zeeb <bzeeb@zabbadoz.net> : Initial irq locking updates
  13  *                                        Added another card with ISAPnP support
  14  *
  15  *  LILO command line usage: sym53c416=<PORTBASE>[,<IRQ>]
  16  *
  17  *  This program is free software; you can redistribute it and/or modify it
  18  *  under the terms of the GNU General Public License as published by the
  19  *  Free Software Foundation; either version 2, or (at your option) any
  20  *  later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful, but
  23  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25  *  General Public License for more details.
  26  *
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/types.h>
  32 #include <linux/init.h>
  33 #include <linux/string.h>
  34 #include <linux/ioport.h>
  35 #include <linux/sched.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/delay.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/spinlock.h>
  40 #include <asm/dma.h>
  41 #include <asm/system.h>
  42 #include <asm/io.h>
  43 #include <linux/blkdev.h>
  44 #include <linux/isapnp.h>
  45 #include "scsi.h"
  46 #include <scsi/scsi_host.h>
  47 #include "sym53c416.h"
  48
  49 #define VERSION_STRING        "Version 1.0.0-ac"
  50
  51 #define TC_LOW       0x00     /* Transfer counter low        */
  52 #define TC_MID       0x01     /* Transfer counter mid        */
  53 #define SCSI_FIFO    0x02     /* SCSI FIFO register          */
  54 #define COMMAND_REG  0x03     /* Command Register            */
  55 #define STATUS_REG   0x04     /* Status Register (READ)      */
  56 #define DEST_BUS_ID  0x04     /* Destination Bus ID (WRITE)  */
  57 #define INT_REG      0x05     /* Interrupt Register (READ)   */
  58 #define TOM          0x05     /* Time out multiplier (WRITE) */
  59 #define STP          0x06     /* Synchronous Transfer period */
  60 #define SYNC_OFFSET  0x07     /* Synchronous Offset          */
  61 #define CONF_REG_1   0x08     /* Configuration register 1    */
  62 #define CONF_REG_2   0x0B     /* Configuration register 2    */
  63 #define CONF_REG_3   0x0C     /* Configuration register 3    */
  64 #define CONF_REG_4   0x0D     /* Configuration register 4    */
  65 #define TC_HIGH      0x0E     /* Transfer counter high       */
  66 #define PIO_FIFO_1   0x10     /* PIO FIFO register 1         */
  67 #define PIO_FIFO_2   0x11     /* PIO FIFO register 2         */
  68 #define PIO_FIFO_3   0x12     /* PIO FIFO register 3         */
  69 #define PIO_FIFO_4   0x13     /* PIO FIFO register 4         */
  70 #define PIO_FIFO_CNT 0x14     /* PIO FIFO count              */
  71 #define PIO_INT_REG  0x15     /* PIO interrupt register      */
  72 #define CONF_REG_5   0x16     /* Configuration register 5    */
  73 #define FEATURE_EN   0x1D     /* Feature Enable register     */
  74
  75 /* Configuration register 1 entries: */
  76 /* Bits 2-0: SCSI ID of host adapter */
  77 #define SCM    0x80                     /* Slow Cable Mode              */
  78 #define SRID   0x40                     /* SCSI Reset Interrupt Disable */
  79 #define PTM    0x20                     /* Parity Test Mode             */
  80 #define EPC    0x10                     /* Enable Parity Checking       */
  81 #define CTME   0x08                     /* Special Test Mode            */
  82
  83 /* Configuration register 2 entries: */
  84 #define FE     0x40                     /* Features Enable              */
  85 #define SCSI2  0x08                     /* SCSI 2 Enable                */
  86 #define TBPA   0x04                     /* Target Bad Parity Abort      */
  87
  88 /* Configuration register 3 entries: */
  89 #define IDMRC  0x80                     /* ID Message Reserved Check    */
  90 #define QTE    0x40                     /* Queue Tag Enable             */
  91 #define CDB10  0x20                     /* Command Descriptor Block 10  */
  92 #define FSCSI  0x10                     /* FastSCSI                     */
  93 #define FCLK   0x08                     /* FastClock                    */
  94
  95 /* Configuration register 4 entries: */
  96 #define RBS    0x08                     /* Register bank select         */
  97 #define EAN    0x04                     /* Enable Active Negotiation    */
  98
  99 /* Configuration register 5 entries: */
 100 #define LPSR   0x80                     /* Lower Power SCSI Reset       */
 101 #define IE     0x20                     /* Interrupt Enable             */
 102 #define LPM    0x02                     /* Low Power Mode               */
 103 #define WSE0   0x01                     /* 0WS Enable                   */
 104
 105 /* Interrupt register entries: */
 106 #define SRST   0x80                     /* SCSI Reset                   */
 107 #define ILCMD  0x40                     /* Illegal Command              */
 108 #define DIS    0x20                     /* Disconnect                   */
 109 #define BS     0x10                     /* Bus Service                  */
 110 #define FC     0x08                     /* Function Complete            */
 111 #define RESEL  0x04                     /* Reselected                   */
 112 #define SI     0x03                     /* Selection Interrupt          */
 113
 114 /* Status Register Entries: */
 115 #define SCI    0x80                     /* SCSI Core Int                */
 116 #define GE     0x40                     /* Gross Error                  */
 117 #define PE     0x20                     /* Parity Error                 */
 118 #define TC     0x10                     /* Terminal Count               */
 119 #define VGC    0x08                     /* Valid Group Code             */
 120 #define PHBITS 0x07                     /* Phase bits                   */
 121
 122 /* PIO Interrupt Register Entries: */
 123 #define SCI    0x80                     /* SCSI Core Int                */
 124 #define PFI    0x40                     /* PIO FIFO Interrupt           */
 125 #define FULL   0x20                     /* PIO FIFO Full                */
 126 #define EMPTY  0x10                     /* PIO FIFO Empty               */
 127 #define CE     0x08                     /* Collision Error              */
 128 #define OUE    0x04                     /* Overflow / Underflow error   */
 129 #define FIE    0x02                     /* Full Interrupt Enable        */
 130 #define EIE    0x01                     /* Empty Interrupt Enable       */
 131
 132 /* SYM53C416 SCSI phases (lower 3 bits of SYM53C416_STATUS_REG) */
 133 #define PHASE_DATA_OUT    0x00
 134 #define PHASE_DATA_IN     0x01
 135 #define PHASE_COMMAND     0x02
 136 #define PHASE_STATUS      0x03
 137 #define PHASE_RESERVED_1  0x04
 138 #define PHASE_RESERVED_2  0x05
 139 #define PHASE_MESSAGE_OUT 0x06
 140 #define PHASE_MESSAGE_IN  0x07
 141
 142 /* SYM53C416 core commands */
 143 #define NOOP                      0x00
 144 #define FLUSH_FIFO                0x01
 145 #define RESET_CHIP                0x02
 146 #define RESET_SCSI_BUS            0x03
 147 #define DISABLE_SEL_RESEL         0x45
 148 #define RESEL_SEQ                 0x40
 149 #define SEL_WITHOUT_ATN_SEQ       0x41
 150 #define SEL_WITH_ATN_SEQ          0x42
 151 #define SEL_WITH_ATN_AND_STOP_SEQ 0x43
 152 #define ENABLE_SEL_RESEL          0x44
 153 #define SEL_WITH_ATN3_SEQ         0x46
 154 #define RESEL3_SEQ                0x47
 155 #define SND_MSG                   0x20
 156 #define SND_STAT                  0x21
 157 #define SND_DATA                  0x22
 158 #define DISCONNECT_SEQ            0x23
 159 #define TERMINATE_SEQ             0x24
 160 #define TARGET_COMM_COMPLETE_SEQ  0x25
 161 #define DISCONN                   0x27
 162 #define RECV_MSG_SEQ              0x28
 163 #define RECV_CMD                  0x29
 164 #define RECV_DATA                 0x2A
 165 #define RECV_CMD_SEQ              0x2B
 166 #define TARGET_ABORT_PIO          0x04
 167 #define TRANSFER_INFORMATION      0x10
 168 #define INIT_COMM_COMPLETE_SEQ    0x11
 169 #define MSG_ACCEPTED              0x12
 170 #define TRANSFER_PAD              0x18
 171 #define SET_ATN                   0x1A
 172 #define RESET_ATN                 0x1B
 173 #define ILLEGAL                   0xFF
 174
 175 #define PIO_MODE                  0x80
 176
 177 #define IO_RANGE 0x20         /* 0x00 - 0x1F                   */
 178 #define ID       "sym53c416"    /* Attention: copied to the sym53c416.h */
 179 #define PIO_SIZE 128          /* Size of PIO fifo is 128 bytes */
 180
 181 #define READ_TIMEOUT              150
 182 #define WRITE_TIMEOUT             150
 183
 184 #ifdef MODULE
 185
 186 #define sym53c416_base sym53c416
 187 #define sym53c416_base_1 sym53c416_1
 188 #define sym53c416_base_2 sym53c416_2
 189 #define sym53c416_base_3 sym53c416_3
 190
 191 static unsigned int sym53c416_base[2] = {0,0};
 192 static unsigned int sym53c416_base_1[2] = {0,0};
 193 static unsigned int sym53c416_base_2[2] = {0,0};
 194 static unsigned int sym53c416_base_3[2] = {0,0};
 195
 196 #endif
 197
 198 #define MAXHOSTS 4
 199
 200 #define SG_ADDRESS(buffer)     ((char *) (page_address((buffer)->page)+(buffer)->offset))
 201
 202 enum phases
 203 {
 204         idle,
 205         data_out,
 206         data_in,
 207         command_ph,
 208         status_ph,
 209         message_out,
 210         message_in
 211 };
 212
 213 typedef struct
 214 {
 215         int base;
 216         int irq;
 217         int scsi_id;
 218 } host;
 219
 220 static host hosts[MAXHOSTS] = {
 221                        {0, 0, SYM53C416_SCSI_ID},
 222                        {0, 0, SYM53C416_SCSI_ID},
 223                        {0, 0, SYM53C416_SCSI_ID},
 224                        {0, 0, SYM53C416_SCSI_ID}
 225                        };
 226
 227 static int host_index = 0;
 228 static char info[120];
 229 static Scsi_Cmnd *current_command = NULL;
 230 static int fastpio = 1;
 231
 232 static int probeaddrs[] = {0x200, 0x220, 0x240, 0};
 233
 234 static void sym53c416_set_transfer_counter(int base, unsigned int len)
 235 {
 236         /* Program Transfer Counter */
 237         outb(len & 0x0000FF, base + TC_LOW);
 238         outb((len & 0x00FF00) >> 8, base + TC_MID);
 239         outb((len & 0xFF0000) >> 16, base + TC_HIGH);
 240 }
 241
 242 static DEFINE_SPINLOCK(sym53c416_lock);
 243
 244 /* Returns the number of bytes read */
 245 static __inline__ unsigned int sym53c416_read(int base, unsigned char *buffer, unsigned int len)
 246 {
 247         unsigned int orig_len = len;
 248         unsigned long flags = 0;
 249         unsigned int bytes_left;
 250         unsigned long i;
 251         int timeout = READ_TIMEOUT;
 252
 253         /* Do transfer */
 254         spin_lock_irqsave(&sym53c416_lock, flags);
 255         while(len && timeout)
 256         {
 257                 bytes_left = inb(base + PIO_FIFO_CNT); /* Number of bytes in the PIO FIFO */
 258                 if(fastpio && bytes_left > 3)
 259                 {
 260                         insl(base + PIO_FIFO_1, buffer, bytes_left >> 2);
 261                         buffer += bytes_left & 0xFC;
 262                         len -= bytes_left & 0xFC;
 263                 }
 264                 else if(bytes_left > 0)
 265                 {
 266                         len -= bytes_left;
 267                         for(; bytes_left > 0; bytes_left--)
 268                                 *(buffer++) = inb(base + PIO_FIFO_1);
 269                 }
 270                 else
 271                 {
 272                         i = jiffies + timeout;
 273                         spin_unlock_irqrestore(&sym53c416_lock, flags);
 274                         while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & EMPTY) && timeout)
 275                                 if(inb(base + PIO_INT_REG) & SCI)
 276                                         timeout = 0;
 277                         spin_lock_irqsave(&sym53c416_lock, flags);
 278                         if(inb(base + PIO_INT_REG) & EMPTY)
 279                                 timeout = 0;
 280                 }
 281         }
 282         spin_unlock_irqrestore(&sym53c416_lock, flags);
 283         return orig_len - len;
 284 }
 285
 286 /* Returns the number of bytes written */
 287 static __inline__ unsigned int sym53c416_write(int base, unsigned char *buffer, unsigned int len)
 288 {
 289         unsigned int orig_len = len;
 290         unsigned long flags = 0;
 291         unsigned int bufferfree;
 292         unsigned long i;
 293         unsigned int timeout = WRITE_TIMEOUT;
 294
 295         /* Do transfer */
 296         spin_lock_irqsave(&sym53c416_lock, flags);
 297         while(len && timeout)
 298         {
 299                 bufferfree = PIO_SIZE - inb(base + PIO_FIFO_CNT);
 300                 if(bufferfree > len)
 301                         bufferfree = len;
 302                 if(fastpio && bufferfree > 3)
 303                 {
 304                         outsl(base + PIO_FIFO_1, buffer, bufferfree >> 2);
 305                         buffer += bufferfree & 0xFC;
 306                         len -= bufferfree & 0xFC;
 307                 }
 308                 else if(bufferfree > 0)
 309                 {
 310                         len -= bufferfree;
 311                         for(; bufferfree > 0; bufferfree--)
 312                                 outb(*(buffer++), base + PIO_FIFO_1);
 313                 }
 314                 else
 315                 {
 316                         i = jiffies + timeout;
 317                         spin_unlock_irqrestore(&sym53c416_lock, flags);
 318                         while(time_before(jiffies, i) && (inb(base + PIO_INT_REG) & FULL) && timeout)
 319                                 ;
 320                         spin_lock_irqsave(&sym53c416_lock, flags);
 321                         if(inb(base + PIO_INT_REG) & FULL)
 322                                 timeout = 0;
 323                 }
 324         }
 325         spin_unlock_irqrestore(&sym53c416_lock, flags);
 326         return orig_len - len;
 327 }
 328
 329 static irqreturn_t sym53c416_intr_handle(int irq, void *dev_id,
 330                                         struct pt_regs *regs)
 331 {
 332         struct Scsi_Host *dev = dev_id;
 333         int base = 0;
 334         int i;
 335         unsigned long flags = 0;
 336         unsigned char status_reg, pio_int_reg, int_reg;
 337         struct scatterlist *sglist;
 338         unsigned int sgcount;
 339         unsigned int tot_trans = 0;
 340
 341         /* We search the base address of the host adapter which caused the interrupt */
 342         /* FIXME: should pass dev_id sensibly as hosts[i] */
 343         for(i = 0; i < host_index && !base; i++)
 344                 if(irq == hosts[i].irq)
 345                         base = hosts[i].base;
 346         /* If no adapter found, we cannot handle the interrupt. Leave a message */
 347         /* and continue. This should never happen...                            */
 348         if(!base)
 349         {
 350                 printk(KERN_ERR "sym53c416: No host adapter defined for interrupt %d\n", irq);
 351                 return IRQ_NONE;
 352         }
 353         /* Now we have the base address and we can start handling the interrupt */
 354
 355         spin_lock_irqsave(dev->host_lock,flags);
 356         status_reg = inb(base + STATUS_REG);
 357         pio_int_reg = inb(base + PIO_INT_REG);
 358         int_reg = inb(base + INT_REG);
 359         spin_unlock_irqrestore(dev->host_lock, flags);
 360
 361         /* First, we handle error conditions */
 362         if(int_reg & SCI)         /* SCSI Reset */
 363         {
 364                 printk(KERN_DEBUG "sym53c416: Reset received\n");
 365                 current_command->SCp.phase = idle;
 366                 current_command->result = DID_RESET << 16;
 367                 spin_lock_irqsave(dev->host_lock, flags);
 368                 current_command->scsi_done(current_command);
 369                 spin_unlock_irqrestore(dev->host_lock, flags);
 370                 goto out;
 371         }
 372         if(int_reg & ILCMD)       /* Illegal Command */
 373         {
 374                 printk(KERN_WARNING "sym53c416: Illegal Command: 0x%02x.\n", inb(base + COMMAND_REG));
 375                 current_command->SCp.phase = idle;
 376                 current_command->result = DID_ERROR << 16;
 377                 spin_lock_irqsave(dev->host_lock, flags);
 378                 current_command->scsi_done(current_command);
 379                 spin_unlock_irqrestore(dev->host_lock, flags);
 380                 goto out;
 381         }
 382         if(status_reg & GE)         /* Gross Error */
 383         {
 384                 printk(KERN_WARNING "sym53c416: Controller reports gross error.\n");
 385                 current_command->SCp.phase = idle;
 386                 current_command->result = DID_ERROR << 16;
 387                 spin_lock_irqsave(dev->host_lock, flags);
 388                 current_command->scsi_done(current_command);
 389                 spin_unlock_irqrestore(dev->host_lock, flags);
 390                 goto out;
 391         }
 392         if(status_reg & PE)         /* Parity Error */
 393         {
 394                 printk(KERN_WARNING "sym53c416:SCSI parity error.\n");
 395                 current_command->SCp.phase = idle;
 396                 current_command->result = DID_PARITY << 16;
 397                 spin_lock_irqsave(dev->host_lock, flags);
 398                 current_command->scsi_done(current_command);
 399                 spin_unlock_irqrestore(dev->host_lock, flags);
 400                 goto out;
 401         }
 402         if(pio_int_reg & (CE | OUE))
 403         {
 404                 printk(KERN_WARNING "sym53c416: PIO interrupt error.\n");
 405                 current_command->SCp.phase = idle;
 406                 current_command->result = DID_ERROR << 16;
 407                 spin_lock_irqsave(dev->host_lock, flags);
 408                 current_command->scsi_done(current_command);
 409                 spin_unlock_irqrestore(dev->host_lock, flags);
 410                 goto out;
 411         }
 412         if(int_reg & DIS)           /* Disconnect */
 413         {
 414                 if(current_command->SCp.phase != message_in)
 415                         current_command->result = DID_NO_CONNECT << 16;
 416                 else
 417                         current_command->result = (current_command->SCp.Status & 0xFF) | ((current_command->SCp.Message & 0xFF) << 8) | (DID_OK << 16);
 418                 current_command->SCp.phase = idle;
 419                 spin_lock_irqsave(dev->host_lock, flags);
 420                 current_command->scsi_done(current_command);
 421                 spin_unlock_irqrestore(dev->host_lock, flags);
 422                 goto out;
 423         }
 424         /* Now we handle SCSI phases         */
 425
 426         switch(status_reg & PHBITS)       /* Filter SCSI phase out of status reg */
 427         {
 428                 case PHASE_DATA_OUT:
 429                 {
 430                         if(int_reg & BS)
 431                         {
 432                                 current_command->SCp.phase = data_out;
 433                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 434                                 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
 435                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 436                                 if(!current_command->use_sg)
 437                                         tot_trans = sym53c416_write(base, current_command->request_buffer, current_command->request_bufflen);
 438                                 else
 439                                 {
 440                                         sgcount = current_command->use_sg;
 441                                         sglist = current_command->request_buffer;
 442                                         while(sgcount--)
 443                                         {
 444                                                 tot_trans += sym53c416_write(base, SG_ADDRESS(sglist), sglist->length);
 445                                                 sglist++;
 446                                         }
 447                                 }
 448                                 if(tot_trans < current_command->underflow)
 449                                         printk(KERN_WARNING "sym53c416: Underflow, wrote %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 450                         }
 451                         break;
 452                 }
 453
 454                 case PHASE_DATA_IN:
 455                 {
 456                         if(int_reg & BS)
 457                         {
 458                                 current_command->SCp.phase = data_in;
 459                                 outb(FLUSH_FIFO, base + COMMAND_REG);
 460                                 sym53c416_set_transfer_counter(base, current_command->request_bufflen);
 461                                 outb(TRANSFER_INFORMATION | PIO_MODE, base + COMMAND_REG);
 462                                 if(!current_command->use_sg)
 463                                         tot_trans = sym53c416_read(base, current_command->request_buffer, current_command->request_bufflen);
 464                                 else
 465                                 {
 466                                         sgcount = current_command->use_sg;
 467                                         sglist = current_command->request_buffer;
 468                                         while(sgcount--)
 469                                         {
 470                                                 tot_trans += sym53c416_read(base, SG_ADDRESS(sglist), sglist->length);
 471                                                 sglist++;
 472                                         }
 473                                 }
 474                                 if(tot_trans < current_command->underflow)
 475                                         printk(KERN_WARNING "sym53c416: Underflow, read %d bytes, request for %d bytes.\n", tot_trans, current_command->underflow);
 476                         }
 477                         break;
 478                 }
 479
 480                 case PHASE_COMMAND:
 481                 {
 482                         current_command->SCp.phase = command_ph;
 483                         printk(KERN_ERR "sym53c416: Unknown interrupt in command phase.\n");
 484                         break;
 485                 }
 486
 487                 case PHASE_STATUS:
 488                 {
 489                         current_command->SCp.phase = status_ph;
 490                         outb(FLUSH_FIFO, base + COMMAND_REG);
 491                         outb(INIT_COMM_COMPLETE_SEQ, base + COMMAND_REG);
 492                         break;
 493                 }
 494
 495                 case PHASE_RESERVED_1:
 496                 case PHASE_RESERVED_2:
 497                 {
 498                         printk(KERN_ERR "sym53c416: Reserved phase occurred.\n");
 499                         break;
 500                 }
 501
 502                 case PHASE_MESSAGE_OUT:
 503                 {
 504                         current_command->SCp.phase = message_out;
 505                         outb(SET_ATN, base + COMMAND_REG);
 506                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 507                         break;
 508                 }
 509
 510                 case PHASE_MESSAGE_IN:
 511                 {
 512                         current_command->SCp.phase = message_in;
 513                         current_command->SCp.Status = inb(base + SCSI_FIFO);
 514                         current_command->SCp.Message = inb(base + SCSI_FIFO);
 515                         if(current_command->SCp.Message == SAVE_POINTERS || current_command->SCp.Message == DISCONNECT)
 516                                 outb(SET_ATN, base + COMMAND_REG);
 517                         outb(MSG_ACCEPTED, base + COMMAND_REG);
 518                         break;
 519                 }
 520         }
 521 out:
 522         return IRQ_HANDLED;
 523 }
 524
 525 static void sym53c416_init(int base, int scsi_id)
 526 {
 527         outb(RESET_CHIP, base + COMMAND_REG);
 528         outb(NOOP, base + COMMAND_REG);
 529         outb(0x99, base + TOM); /* Time out of 250 ms */
 530         outb(0x05, base + STP);
 531         outb(0x00, base + SYNC_OFFSET);
 532         outb(EPC | scsi_id, base + CONF_REG_1);
 533         outb(FE | SCSI2 | TBPA, base + CONF_REG_2);
 534         outb(IDMRC | QTE | CDB10 | FSCSI | FCLK, base + CONF_REG_3);
 535         outb(0x83 | EAN, base + CONF_REG_4);
 536         outb(IE | WSE0, base + CONF_REG_5);
 537         outb(0, base + FEATURE_EN);
 538 }
 539
 540 static int sym53c416_probeirq(int base, int scsi_id)
 541 {
 542         int irq, irqs;
 543         unsigned long i;
 544
 545         /* Clear interrupt register */
 546         inb(base + INT_REG);
 547         /* Start probing for irq's */
 548         irqs = probe_irq_on();
 549         /* Reinit chip */
 550         sym53c416_init(base, scsi_id);
 551         /* Cause interrupt */
 552         outb(NOOP, base + COMMAND_REG);
 553         outb(ILLEGAL, base + COMMAND_REG);
 554         outb(0x07, base + DEST_BUS_ID);
 555         outb(0x00, base + DEST_BUS_ID);
 556         /* Wait for interrupt to occur */
 557         i = jiffies + 20;
 558         while(time_before(jiffies, i) && !(inb(base + STATUS_REG) & SCI))
 559                 barrier();
 560         if(time_before_eq(i, jiffies))  /* timed out */
 561                 return 0;
 562         /* Get occurred irq */
 563         irq = probe_irq_off(irqs);
 564         sym53c416_init(base, scsi_id);
 565         return irq;
 566 }
 567
 568 /* Setup: sym53c416=base,irq */
 569 void sym53c416_setup(char *str, int *ints)
 570 {
 571         int i;
 572
 573         if(host_index >= MAXHOSTS)
 574         {
 575                 printk(KERN_WARNING "sym53c416: Too many hosts defined\n");
 576                 return;
 577         }
 578         if(ints[0] < 1 || ints[0] > 2)
 579         {
 580                 printk(KERN_ERR "sym53c416: Wrong number of parameters:\n");
 581                 printk(KERN_ERR "sym53c416: usage: sym53c416=<base>[,<irq>]\n");
 582                 return;
 583         }
 584         for(i = 0; i < host_index && i >= 0; i++)
 585                 if(hosts[i].base == ints[1])
 586                         i = -2;
 587         if(i >= 0)
 588         {
 589                 hosts[host_index].base = ints[1];
 590                 hosts[host_index].irq = (ints[0] == 2)? ints[2] : 0;
 591                 host_index++;
 592         }
 593 }
 594
 595 static int sym53c416_test(int base)
 596 {
 597         outb(RESET_CHIP, base + COMMAND_REG);
 598         outb(NOOP, base + COMMAND_REG);
 599         if(inb(base + COMMAND_REG) != NOOP)
 600                 return 0;
 601         if(!inb(base + TC_HIGH) || inb(base + TC_HIGH) == 0xFF)
 602                 return 0;
 603         if((inb(base + PIO_INT_REG) & (FULL | EMPTY | CE | OUE | FIE | EIE)) != EMPTY)
 604                 return 0;
 605         return 1;
 606 }
 607
 608
 609 static struct isapnp_device_id id_table[] __devinitdata = {
 610         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 611                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4161), 0 },
 612         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 613                 ISAPNP_VENDOR('S','L','I'), ISAPNP_FUNCTION(0x4163), 0 },
 614         {       ISAPNP_DEVICE_SINGLE_END }
 615 };
 616
 617 MODULE_DEVICE_TABLE(isapnp, id_table);
 618
 619 static void sym53c416_probe(void)
 620 {
 621         int *base = probeaddrs;
 622         int ints[2];
 623
 624         ints[0] = 1;
 625         for(; *base; base++) {
 626                 if (request_region(*base, IO_RANGE, ID)) {
 627                         if (sym53c416_test(*base)) {
 628                                 ints[1] = *base;
 629                                 sym53c416_setup(NULL, ints);
 630                         }
 631                         release_region(*base, IO_RANGE);
 632                 }
 633         }
 634 }
 635
 636 int __init sym53c416_detect(struct scsi_host_template *tpnt)
 637 {
 638         unsigned long flags;
 639         struct Scsi_Host * shpnt = NULL;
 640         int i;
 641         int count;
 642         struct pnp_dev *idev = NULL;
 643
 644 #ifdef MODULE
 645         int ints[3];
 646
 647         ints[0] = 2;
 648         if(sym53c416_base)
 649         {
 650                 ints[1] = sym53c416_base[0];
 651                 ints[2] = sym53c416_base[1];
 652                 sym53c416_setup(NULL, ints);
 653         }
 654         if(sym53c416_base_1)
 655         {
 656                 ints[1] = sym53c416_base_1[0];
 657                 ints[2] = sym53c416_base_1[1];
 658                 sym53c416_setup(NULL, ints);
 659         }
 660         if(sym53c416_base_2)
 661         {
 662                 ints[1] = sym53c416_base_2[0];
 663                 ints[2] = sym53c416_base_2[1];
 664                 sym53c416_setup(NULL, ints);
 665         }
 666         if(sym53c416_base_3)
 667         {
 668                 ints[1] = sym53c416_base_3[0];
 669                 ints[2] = sym53c416_base_3[1];
 670                 sym53c416_setup(NULL, ints);
 671         }
 672 #endif
 673         printk(KERN_INFO "sym53c416.c: %s\n", VERSION_STRING);
 674
 675         for (i=0; id_table[i].vendor != 0; i++) {
 676                 while((idev=pnp_find_dev(NULL, id_table[i].vendor,
 677                                         id_table[i].function, idev))!=NULL)
 678                 {
 679                         int i[3];
 680
 681                         if(pnp_device_attach(idev)<0)
 682                         {
 683                                 printk(KERN_WARNING "sym53c416: unable to attach PnP device.\n");
 684                                 continue;
 685                         }
 686                         if(pnp_activate_dev(idev) < 0)
 687                         {
 688                                 printk(KERN_WARNING "sym53c416: unable to activate PnP device.\n");
 689                                 pnp_device_detach(idev);
 690                                 continue;
 691
 692                         }
 693
 694                         i[0] = 2;
 695                         i[1] = pnp_port_start(idev, 0);
 696                         i[2] = pnp_irq(idev, 0);
 697
 698                         printk(KERN_INFO "sym53c416: ISAPnP card found and configured at 0x%X, IRQ %d.\n",
 699                                 i[1], i[2]);
 700                         sym53c416_setup(NULL, i);
 701                 }
 702         }
 703         sym53c416_probe();
 704
 705         /* Now we register and set up each host adapter found... */
 706         for(count = 0, i = 0; i < host_index; i++) {
 707                 if (!request_region(hosts[i].base, IO_RANGE, ID))
 708                         continue;
 709                 if (!sym53c416_test(hosts[i].base)) {
 710                         printk(KERN_WARNING "No sym53c416 found at address 0x%03x\n", hosts[i].base);
 711                         goto fail_release_region;
 712                 }
 713
 714                 /* We don't have an irq yet, so we should probe for one */
 715                 if (!hosts[i].irq)
 716                         hosts[i].irq = sym53c416_probeirq(hosts[i].base, hosts[i].scsi_id);
 717                 if (!hosts[i].irq)
 718                         goto fail_release_region;
 719
 720                 shpnt = scsi_register(tpnt, 0);
 721                 if (!shpnt)
 722                         goto fail_release_region;
 723                 /* Request for specified IRQ */
 724                 if (request_irq(hosts[i].irq, sym53c416_intr_handle, 0, ID, shpnt))
 725                         goto fail_free_host;
 726
 727                 spin_lock_irqsave(&sym53c416_lock, flags);
 728                 shpnt->unique_id = hosts[i].base;
 729                 shpnt->io_port = hosts[i].base;
 730                 shpnt->n_io_port = IO_RANGE;
 731                 shpnt->irq = hosts[i].irq;
 732                 shpnt->this_id = hosts[i].scsi_id;
 733                 sym53c416_init(hosts[i].base, hosts[i].scsi_id);
 734                 count++;
 735                 spin_unlock_irqrestore(&sym53c416_lock, flags);
 736                 continue;
 737
 738  fail_free_host:
 739                 scsi_unregister(shpnt);
 740  fail_release_region:
 741                 release_region(hosts[i].base, IO_RANGE);
 742         }
 743         return count;
 744 }
 745
 746 const char *sym53c416_info(struct Scsi_Host *SChost)
 747 {
 748         int i;
 749         int base = SChost->io_port;
 750         int irq = SChost->irq;
 751         int scsi_id = 0;
 752         int rev = inb(base + TC_HIGH);
 753
 754         for(i = 0; i < host_index; i++)
 755                 if(hosts[i].base == base)
 756                         scsi_id = hosts[i].scsi_id;
 757         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");
 758         return info;
 759 }
 760
 761 int sym53c416_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
 762 {
 763         int base;
 764         unsigned long flags = 0;
 765         int i;
 766
 767         /* Store base register as we can have more than one controller in the system */
 768         base = SCpnt->device->host->io_port;
 769         current_command = SCpnt;                  /* set current command                */
 770         current_command->scsi_done = done;        /* set ptr to done function           */
 771         current_command->SCp.phase = command_ph;  /* currect phase is the command phase */
 772         current_command->SCp.Status = 0;
 773         current_command->SCp.Message = 0;
 774
 775         spin_lock_irqsave(&sym53c416_lock, flags);
 776         outb(scmd_id(SCpnt), base + DEST_BUS_ID); /* Set scsi id target        */
 777         outb(FLUSH_FIFO, base + COMMAND_REG);    /* Flush SCSI and PIO FIFO's */
 778         /* Write SCSI command into the SCSI fifo */
 779         for(i = 0; i < SCpnt->cmd_len; i++)
 780                 outb(SCpnt->cmnd[i], base + SCSI_FIFO);
 781         /* Start selection sequence */
 782         outb(SEL_WITHOUT_ATN_SEQ, base + COMMAND_REG);
 783         /* Now an interrupt will be generated which we will catch in out interrupt routine */
 784         spin_unlock_irqrestore(&sym53c416_lock, flags);
 785         return 0;
 786 }
 787
 788 static int sym53c416_host_reset(Scsi_Cmnd *SCpnt)
 789 {
 790         int base;
 791         int scsi_id = -1;
 792         int i;
 793         unsigned long flags;
 794
 795         spin_lock_irqsave(&sym53c416_lock, flags);
 796
 797         /* printk("sym53c416_reset\n"); */
 798         base = SCpnt->device->host->io_port;
 799         /* search scsi_id - fixme, we shouldnt need to iterate for this! */
 800         for(i = 0; i < host_index && scsi_id == -1; i++)
 801                 if(hosts[i].base == base)
 802                         scsi_id = hosts[i].scsi_id;
 803         outb(RESET_CHIP, base + COMMAND_REG);
 804         outb(NOOP | PIO_MODE, base + COMMAND_REG);
 805         outb(RESET_SCSI_BUS, base + COMMAND_REG);
 806         sym53c416_init(base, scsi_id);
 807
 808         spin_unlock_irqrestore(&sym53c416_lock, flags);
 809         return SUCCESS;
 810 }
 811
 812 static int sym53c416_release(struct Scsi_Host *shost)
 813 {
 814         if (shost->irq)
 815                 free_irq(shost->irq, shost);
 816         if (shost->io_port && shost->n_io_port)
 817                 release_region(shost->io_port, shost->n_io_port);
 818         return 0;
 819 }
 820
 821 static int sym53c416_bios_param(struct scsi_device *sdev,
 822                 struct block_device *dev,
 823                 sector_t capacity, int *ip)
 824 {
 825         int size;
 826
 827         size = capacity;
 828         ip[0] = 64;                             /* heads                        */
 829         ip[1] = 32;                             /* sectors                      */
 830         if((ip[2] = size >> 11) > 1024)         /* cylinders, test for big disk */
 831         {
 832                 ip[0] = 255;                    /* heads                        */
 833                 ip[1] = 63;                     /* sectors                      */
 834                 ip[2] = size / (255 * 63);      /* cylinders                    */
 835         }
 836         return 0;
 837 }
 838
 839 /* Loadable module support */
 840 #ifdef MODULE
 841
 842 MODULE_AUTHOR("Lieven Willems");
 843 MODULE_LICENSE("GPL");
 844
 845 module_param_array(sym53c416, uint, NULL, 0);
 846 module_param_array(sym53c416_1, uint, NULL, 0);
 847 module_param_array(sym53c416_2, uint, NULL, 0);
 848 module_param_array(sym53c416_3, uint, NULL, 0);
 849
 850 #endif
 851
 852 static struct scsi_host_template driver_template = {
 853         .proc_name =            "sym53c416",
 854         .name =                 "Symbios Logic 53c416",
 855         .detect =               sym53c416_detect,
 856         .info =                 sym53c416_info,
 857         .queuecommand =         sym53c416_queuecommand,
 858         .eh_host_reset_handler =sym53c416_host_reset,
 859         .release =              sym53c416_release,
 860         .bios_param =           sym53c416_bios_param,
 861         .can_queue =            1,
 862         .this_id =              SYM53C416_SCSI_ID,
 863         .sg_tablesize =         32,
 864         .cmd_per_lun =          1,
 865         .unchecked_isa_dma =    1,
 866         .use_clustering =       ENABLE_CLUSTERING,
 867 };
 868 #include "scsi_module.c"