drivers/ide/legacy/qd65xx.c

   1 /*
   2  *  Copyright (C) 1996-2001  Linus Torvalds & author (see below)
   3  */
   4
   5 /*
   6  *  Version 0.03        Cleaned auto-tune, added probe
   7  *  Version 0.04        Added second channel tuning
   8  *  Version 0.05        Enhanced tuning ; added qd6500 support
   9  *  Version 0.06        Added dos driver's list
  10  *  Version 0.07        Second channel bug fix
  11  *
  12  * QDI QD6500/QD6580 EIDE controller fast support
  13  *
  14  * Please set local bus speed using kernel parameter idebus
  15  *      for example, "idebus=33" stands for 33Mhz VLbus
  16  * To activate controller support, use "ide0=qd65xx"
  17  * To enable tuning, use "hda=autotune hdb=autotune"
  18  * To enable 2nd channel tuning (qd6580 only), use "hdc=autotune hdd=autotune"
  19  */
  20
  21 /*
  22  * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
  23  * Samuel Thibault <samuel.thibault@fnac.net>
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/types.h>
  28 #include <linux/kernel.h>
  29 #include <linux/delay.h>
  30 #include <linux/timer.h>
  31 #include <linux/mm.h>
  32 #include <linux/ioport.h>
  33 #include <linux/blkdev.h>
  34 #include <linux/hdreg.h>
  35 #include <linux/ide.h>
  36 #include <linux/init.h>
  37 #include <asm/system.h>
  38 #include <asm/io.h>
  39
  40 #include "qd65xx.h"
  41
  42 /*
  43  * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
  44  *            or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
  45  *      -- qd6500 is a single IDE interface
  46  *      -- qd6580 is a dual IDE interface
  47  *
  48  * More research on qd6580 being done by willmore@cig.mot.com (David)
  49  * More Information given by Petr Soucek (petr@ryston.cz)
  50  * http://www.ryston.cz/petr/vlb
  51  */
  52
  53 /*
  54  * base: Timer1
  55  *
  56  *
  57  * base+0x01: Config (R/O)
  58  *
  59  * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
  60  * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
  61  * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
  62  * bit 3: qd6500: 1 = disabled, 0 = enabled
  63  *        qd6580: 1
  64  * upper nibble:
  65  *        qd6500: 1100
  66  *        qd6580: either 1010 or 0101
  67  *
  68  *
  69  * base+0x02: Timer2 (qd6580 only)
  70  *
  71  *
  72  * base+0x03: Control (qd6580 only)
  73  *
  74  * bits 0-3 must always be set 1
  75  * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
  76  * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
  77  *         0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
  78  *                                                   channel 1 for hdc & hdd
  79  * bit 1 : 1 = only disks on primary port
  80  *         0 = disks & ATAPI devices on primary port
  81  * bit 2-4 : always 0
  82  * bit 5 : status, but of what ?
  83  * bit 6 : always set 1 by dos driver
  84  * bit 7 : set 1 for non-ATAPI devices on primary port
  85  *      (maybe read-ahead and post-write buffer ?)
  86  */
  87
  88 static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
  89
  90 /*
  91  * qd65xx_select:
  92  *
  93  * This routine is invoked to prepare for access to a given drive.
  94  */
  95
  96 static void qd65xx_select(ide_drive_t *drive)
  97 {
  98         u8 index = ((   (QD_TIMREG(drive)) & 0x80 ) >> 7) |
  99                         (QD_TIMREG(drive) & 0x02);
 100
 101         if (timings[index] != QD_TIMING(drive))
 102                 outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
 103 }
 104
 105 /*
 106  * qd6500_compute_timing
 107  *
 108  * computes the timing value where
 109  *      lower nibble represents active time,   in count of VLB clocks
 110  *      upper nibble represents recovery time, in count of VLB clocks
 111  */
 112
 113 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
 114 {
 115         u8 active_cycle,recovery_cycle;
 116
 117         if (system_bus_clock()<=33) {
 118                 active_cycle =   9  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 9);
 119                 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
 120         } else {
 121                 active_cycle =   8  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 1, 8);
 122                 recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
 123         }
 124
 125         return((recovery_cycle<<4) | 0x08 | active_cycle);
 126 }
 127
 128 /*
 129  * qd6580_compute_timing
 130  *
 131  * idem for qd6580
 132  */
 133
 134 static u8 qd6580_compute_timing (int active_time, int recovery_time)
 135 {
 136         u8 active_cycle   = 17 - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 17);
 137         u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
 138
 139         return((recovery_cycle<<4) | active_cycle);
 140 }
 141
 142 /*
 143  * qd_find_disk_type
 144  *
 145  * tries to find timing from dos driver's table
 146  */
 147
 148 static int qd_find_disk_type (ide_drive_t *drive,
 149                 int *active_time, int *recovery_time)
 150 {
 151         struct qd65xx_timing_s *p;
 152         char model[40];
 153
 154         if (!*drive->id->model) return 0;
 155
 156         strncpy(model,drive->id->model,40);
 157         ide_fixstring(model,40,1); /* byte-swap */
 158
 159         for (p = qd65xx_timing ; p->offset != -1 ; p++) {
 160                 if (!strncmp(p->model, model+p->offset, 4)) {
 161                         printk(KERN_DEBUG "%s: listed !\n", drive->name);
 162                         *active_time = p->active;
 163                         *recovery_time = p->recovery;
 164                         return 1;
 165                 }
 166         }
 167         return 0;
 168 }
 169
 170 /*
 171  * qd_set_timing:
 172  *
 173  * records the timing
 174  */
 175
 176 static void qd_set_timing (ide_drive_t *drive, u8 timing)
 177 {
 178         drive->drive_data &= 0xff00;
 179         drive->drive_data |= timing;
 180
 181         printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
 182 }
 183
 184 static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
 185 {
 186         int active_time   = 175;
 187         int recovery_time = 415; /* worst case values from the dos driver */
 188
 189         /*
 190          * FIXME: use "pio" value
 191          */
 192         if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
 193                 && drive->id->tPIO && (drive->id->field_valid & 0x02)
 194                 && drive->id->eide_pio >= 240) {
 195
 196                 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
 197                                 drive->id->tPIO);
 198                 active_time = 110;
 199                 recovery_time = drive->id->eide_pio - 120;
 200         }
 201
 202         qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
 203 }
 204
 205 static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
 206 {
 207         int base = HWIF(drive)->select_data;
 208         unsigned int cycle_time;
 209         int active_time   = 175;
 210         int recovery_time = 415; /* worst case values from the dos driver */
 211
 212         if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
 213                 cycle_time = ide_pio_cycle_time(drive, pio);
 214
 215                 switch (pio) {
 216                         case 0: break;
 217                         case 3:
 218                                 if (cycle_time >= 110) {
 219                                         active_time = 86;
 220                                         recovery_time = cycle_time - 102;
 221                                 } else
 222                                         printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
 223                                 break;
 224                         case 4:
 225                                 if (cycle_time >= 69) {
 226                                         active_time = 70;
 227                                         recovery_time = cycle_time - 61;
 228                                 } else
 229                                         printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
 230                                 break;
 231                         default:
 232                                 if (cycle_time >= 180) {
 233                                         active_time = 110;
 234                                         recovery_time = cycle_time - 120;
 235                                 } else {
 236                                         active_time = ide_pio_timings[pio].active_time;
 237                                         recovery_time = cycle_time - active_time;
 238                                 }
 239                 }
 240                 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
 241         }
 242
 243         if (!HWIF(drive)->channel && drive->media != ide_disk) {
 244                 outb(0x5f, QD_CONTROL_PORT);
 245                 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
 246                         "and post-write buffer on %s.\n",
 247                         drive->name, HWIF(drive)->name);
 248         }
 249
 250         qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
 251 }
 252
 253 /*
 254  * qd_testreg
 255  *
 256  * tests if the given port is a register
 257  */
 258
 259 static int __init qd_testreg(int port)
 260 {
 261         unsigned long flags;
 262         u8 savereg, readreg;
 263
 264         local_irq_save(flags);
 265         savereg = inb_p(port);
 266         outb_p(QD_TESTVAL, port);       /* safe value */
 267         readreg = inb_p(port);
 268         outb(savereg, port);
 269         local_irq_restore(flags);
 270
 271         if (savereg == QD_TESTVAL) {
 272                 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
 273                 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
 274                 printk(KERN_ERR "Assuming qd65xx is not present.\n");
 275                 return 1;
 276         }
 277
 278         return (readreg != QD_TESTVAL);
 279 }
 280
 281 /*
 282  * qd_setup:
 283  *
 284  * called to setup an ata channel : adjusts attributes & links for tuning
 285  */
 286
 287 static void __init qd_setup(ide_hwif_t *hwif, int base, int config)
 288 {
 289         hwif->select_data = base;
 290         hwif->config_data = config;
 291 }
 292
 293 static void __init qd6500_port_init_devs(ide_hwif_t *hwif)
 294 {
 295         u8 base = hwif->select_data, config = QD_CONFIG(hwif);
 296
 297         hwif->drives[0].drive_data = QD6500_DEF_DATA;
 298         hwif->drives[1].drive_data = QD6500_DEF_DATA;
 299 }
 300
 301 static void __init qd6580_port_init_devs(ide_hwif_t *hwif)
 302 {
 303         u16 t1, t2;
 304         u8 base = hwif->select_data, config = QD_CONFIG(hwif);
 305
 306         if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
 307                 t1 = QD6580_DEF_DATA;
 308                 t2 = QD6580_DEF_DATA2;
 309         } else
 310                 t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
 311
 312         hwif->drives[0].drive_data = t1;
 313         hwif->drives[1].drive_data = t2;
 314 }
 315
 316 static const struct ide_port_info qd65xx_port_info __initdata = {
 317         .chipset                = ide_qd65xx,
 318         .host_flags             = IDE_HFLAG_IO_32BIT |
 319                                   IDE_HFLAG_NO_DMA |
 320                                   IDE_HFLAG_NO_AUTOTUNE,
 321         .pio_mask               = ATA_PIO4,
 322 };
 323
 324 /*
 325  * qd_probe:
 326  *
 327  * looks at the specified baseport, and if qd found, registers & initialises it
 328  * return 1 if another qd may be probed
 329  */
 330
 331 static int __init qd_probe(int base)
 332 {
 333         ide_hwif_t *hwif;
 334         u8 config, unit;
 335         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 336         hw_regs_t hw[2];
 337         struct ide_port_info d = qd65xx_port_info;
 338
 339         config = inb(QD_CONFIG_PORT);
 340
 341         if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
 342                 return -ENODEV;
 343
 344         unit = ! (config & QD_CONFIG_IDE_BASEPORT);
 345
 346         if (unit)
 347                 d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
 348
 349         memset(&hw, 0, sizeof(hw));
 350
 351         ide_std_init_ports(&hw[0], 0x1f0, 0x3f6);
 352         hw[0].irq = 14;
 353
 354         ide_std_init_ports(&hw[1], 0x170, 0x376);
 355         hw[1].irq = 15;
 356
 357         if ((config & 0xf0) == QD_CONFIG_QD6500) {
 358
 359                 if (qd_testreg(base))
 360                          return -ENODEV;        /* bad register */
 361
 362                 /* qd6500 found */
 363
 364                 if (config & QD_CONFIG_DISABLED) {
 365                         printk(KERN_WARNING "qd6500 is disabled !\n");
 366                         return -ENODEV;
 367                 }
 368
 369                 printk(KERN_NOTICE "qd6500 at %#x\n", base);
 370                 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
 371                         config, QD_ID3);
 372
 373                 hwif = ide_find_port_slot(&d);
 374                 if (hwif == NULL)
 375                         return -ENOENT;
 376
 377                 ide_init_port_hw(hwif, &hw[unit]);
 378
 379                 qd_setup(hwif, base, config);
 380
 381                 hwif->port_init_devs = qd6500_port_init_devs;
 382                 hwif->set_pio_mode   = qd6500_set_pio_mode;
 383                 hwif->selectproc     = qd65xx_select;
 384
 385                 idx[unit] = hwif->index;
 386
 387                 ide_device_add(idx, &d);
 388
 389                 return 1;
 390         }
 391
 392         if (((config & 0xf0) == QD_CONFIG_QD6580_A) ||
 393             ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
 394
 395                 u8 control;
 396
 397                 if (qd_testreg(base) || qd_testreg(base + 0x02))
 398                         return -ENODEV; /* bad registers */
 399
 400                 /* qd6580 found */
 401
 402                 control = inb(QD_CONTROL_PORT);
 403
 404                 printk(KERN_NOTICE "qd6580 at %#x\n", base);
 405                 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
 406                         config, control, QD_ID3);
 407
 408                 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
 409
 410                 if (control & QD_CONTR_SEC_DISABLED) {
 411                         /* secondary disabled */
 412
 413                         printk(KERN_INFO "qd6580: single IDE board\n");
 414
 415                         hwif = ide_find_port_slot(&d);
 416                         if (hwif == NULL)
 417                                 return -ENOENT;
 418
 419                         ide_init_port_hw(hwif, &hw[unit]);
 420
 421                         qd_setup(hwif, base, config | (control << 8));
 422
 423                         hwif->port_init_devs = qd6580_port_init_devs;
 424                         hwif->set_pio_mode   = qd6580_set_pio_mode;
 425                         hwif->selectproc     = qd65xx_select;
 426
 427                         idx[unit] = hwif->index;
 428
 429                         ide_device_add(idx, &d);
 430
 431                         return 1;
 432                 } else {
 433                         ide_hwif_t *mate;
 434
 435                         /* secondary enabled */
 436                         printk(KERN_INFO "qd6580: dual IDE board\n");
 437
 438                         hwif = ide_find_port();
 439                         if (hwif) {
 440                                 ide_init_port_hw(hwif, &hw[0]);
 441                                 qd_setup(hwif, base, config | (control << 8));
 442                                 hwif->port_init_devs = qd6580_port_init_devs;
 443                                 hwif->set_pio_mode   = qd6580_set_pio_mode;
 444                                 hwif->selectproc     = qd65xx_select;
 445                                 idx[0] = hwif->index;
 446                         }
 447
 448                         mate = ide_find_port();
 449                         if (mate) {
 450                                 ide_init_port_hw(mate, &hw[1]);
 451                                 qd_setup(mate, base, config | (control << 8));
 452                                 mate->port_init_devs = qd6580_port_init_devs;
 453                                 mate->set_pio_mode   = qd6580_set_pio_mode;
 454                                 mate->selectproc     = qd65xx_select;
 455                                 idx[1] = mate->index;
 456                         }
 457
 458                         ide_device_add(idx, &qd65xx_port_info);
 459
 460                         return 0; /* no other qd65xx possible */
 461                 }
 462         }
 463         /* no qd65xx found */
 464         return -ENODEV;
 465 }
 466
 467 int probe_qd65xx = 0;
 468
 469 module_param_named(probe, probe_qd65xx, bool, 0);
 470 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
 471
 472 static int __init qd65xx_init(void)
 473 {
 474         int rc1, rc2 = -ENODEV;
 475
 476         if (probe_qd65xx == 0)
 477                 return -ENODEV;
 478
 479         rc1 = qd_probe(0x30);
 480         if (rc1)
 481                 rc2 = qd_probe(0xb0);
 482
 483         if (rc1 < 0 && rc2 < 0)
 484                 return -ENODEV;
 485
 486         return 0;
 487 }
 488
 489 module_init(qd65xx_init);
 490
 491 MODULE_AUTHOR("Samuel Thibault");
 492 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
 493 MODULE_LICENSE("GPL");