drivers/macintosh/mediabay.c

   1 /*
   2  * Driver for the media bay on the PowerBook 3400 and 2400.
   3  *
   4  * Copyright (C) 1998 Paul Mackerras.
   5  *
   6  * Various evolutions by Benjamin Herrenschmidt & Henry Worth
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU General Public License
  10  *  as published by the Free Software Foundation; either version
  11  *  2 of the License, or (at your option) any later version.
  12  */
  13 #include <linux/types.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/delay.h>
  17 #include <linux/sched.h>
  18 #include <linux/timer.h>
  19 #include <linux/hdreg.h>
  20 #include <linux/stddef.h>
  21 #include <linux/init.h>
  22 #include <linux/ide.h>
  23 #include <linux/kthread.h>
  24 #include <asm/prom.h>
  25 #include <asm/pgtable.h>
  26 #include <asm/io.h>
  27 #include <asm/machdep.h>
  28 #include <asm/pmac_feature.h>
  29 #include <asm/mediabay.h>
  30 #include <asm/sections.h>
  31 #include <asm/ohare.h>
  32 #include <asm/heathrow.h>
  33 #include <asm/keylargo.h>
  34 #include <linux/adb.h>
  35 #include <linux/pmu.h>
  36
  37
  38 #define MB_DEBUG
  39
  40 #ifdef MB_DEBUG
  41 #define MBDBG(fmt, arg...)      printk(KERN_INFO fmt , ## arg)
  42 #else
  43 #define MBDBG(fmt, arg...)      do { } while (0)
  44 #endif
  45
  46 #define MB_FCR32(bay, r)        ((bay)->base + ((r) >> 2))
  47 #define MB_FCR8(bay, r)         (((volatile u8 __iomem *)((bay)->base)) + (r))
  48
  49 #define MB_IN32(bay,r)          (in_le32(MB_FCR32(bay,r)))
  50 #define MB_OUT32(bay,r,v)       (out_le32(MB_FCR32(bay,r), (v)))
  51 #define MB_BIS(bay,r,v)         (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v)))
  52 #define MB_BIC(bay,r,v)         (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v)))
  53 #define MB_IN8(bay,r)           (in_8(MB_FCR8(bay,r)))
  54 #define MB_OUT8(bay,r,v)        (out_8(MB_FCR8(bay,r), (v)))
  55
  56 struct media_bay_info;
  57
  58 struct mb_ops {
  59         char*   name;
  60         void    (*init)(struct media_bay_info *bay);
  61         u8      (*content)(struct media_bay_info *bay);
  62         void    (*power)(struct media_bay_info *bay, int on_off);
  63         int     (*setup_bus)(struct media_bay_info *bay, u8 device_id);
  64         void    (*un_reset)(struct media_bay_info *bay);
  65         void    (*un_reset_ide)(struct media_bay_info *bay);
  66 };
  67
  68 struct media_bay_info {
  69         u32 __iomem                     *base;
  70         int                             content_id;
  71         int                             state;
  72         int                             last_value;
  73         int                             value_count;
  74         int                             timer;
  75         struct macio_dev                *mdev;
  76         struct mb_ops*                  ops;
  77         int                             index;
  78         int                             cached_gpio;
  79         int                             sleeping;
  80         struct semaphore                lock;
  81 #ifdef CONFIG_BLK_DEV_IDE
  82         void __iomem                    *cd_base;
  83         int                             cd_index;
  84         int                             cd_irq;
  85         int                             cd_retry;
  86 #endif
  87 };
  88
  89 #define MAX_BAYS        2
  90
  91 static struct media_bay_info media_bays[MAX_BAYS];
  92 int media_bay_count = 0;
  93
  94 #ifdef CONFIG_BLK_DEV_IDE
  95 /* check the busy bit in the media-bay ide interface
  96    (assumes the media-bay contains an ide device) */
  97 #define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0)
  98 #endif
  99
 100 /*
 101  * Wait that number of ms between each step in normal polling mode
 102  */
 103 #define MB_POLL_DELAY   25
 104
 105 /*
 106  * Consider the media-bay ID value stable if it is the same for
 107  * this number of milliseconds
 108  */
 109 #define MB_STABLE_DELAY 100
 110
 111 /* Wait after powering up the media bay this delay in ms
 112  * timeout bumped for some powerbooks
 113  */
 114 #define MB_POWER_DELAY  200
 115
 116 /*
 117  * Hold the media-bay reset signal true for this many ticks
 118  * after a device is inserted before releasing it.
 119  */
 120 #define MB_RESET_DELAY  50
 121
 122 /*
 123  * Wait this long after the reset signal is released and before doing
 124  * further operations. After this delay, the IDE reset signal is released
 125  * too for an IDE device
 126  */
 127 #define MB_SETUP_DELAY  100
 128
 129 /*
 130  * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
 131  * (or until the device is ready) before waiting for busy bit to disappear
 132  */
 133 #define MB_IDE_WAIT     1000
 134
 135 /*
 136  * Timeout waiting for busy bit of an IDE device to go down
 137  */
 138 #define MB_IDE_TIMEOUT  5000
 139
 140 /*
 141  * Max retries of the full power up/down sequence for an IDE device
 142  */
 143 #define MAX_CD_RETRIES  3
 144
 145 /*
 146  * States of a media bay
 147  */
 148 enum {
 149         mb_empty = 0,           /* Idle */
 150         mb_powering_up,         /* power bit set, waiting MB_POWER_DELAY */
 151         mb_enabling_bay,        /* enable bits set, waiting MB_RESET_DELAY */
 152         mb_resetting,           /* reset bit unset, waiting MB_SETUP_DELAY */
 153         mb_ide_resetting,       /* IDE reset bit unser, waiting MB_IDE_WAIT */
 154         mb_ide_waiting,         /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */
 155         mb_up,                  /* Media bay full */
 156         mb_powering_down        /* Powering down (avoid too fast down/up) */
 157 };
 158
 159 #define MB_POWER_SOUND          0x08
 160 #define MB_POWER_FLOPPY         0x04
 161 #define MB_POWER_ATA            0x02
 162 #define MB_POWER_PCI            0x01
 163 #define MB_POWER_OFF            0x00
 164
 165 /*
 166  * Functions for polling content of media bay
 167  */
 168
 169 static u8
 170 ohare_mb_content(struct media_bay_info *bay)
 171 {
 172         return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
 173 }
 174
 175 static u8
 176 heathrow_mb_content(struct media_bay_info *bay)
 177 {
 178         return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
 179 }
 180
 181 static u8
 182 keylargo_mb_content(struct media_bay_info *bay)
 183 {
 184         int new_gpio;
 185
 186         new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
 187         if (new_gpio) {
 188                 bay->cached_gpio = new_gpio;
 189                 return MB_NO;
 190         } else if (bay->cached_gpio != new_gpio) {
 191                 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
 192                 (void)MB_IN32(bay, KEYLARGO_MBCR);
 193                 udelay(5);
 194                 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
 195                 (void)MB_IN32(bay, KEYLARGO_MBCR);
 196                 udelay(5);
 197                 bay->cached_gpio = new_gpio;
 198         }
 199         return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
 200 }
 201
 202 /*
 203  * Functions for powering up/down the bay, puts the bay device
 204  * into reset state as well
 205  */
 206
 207 static void
 208 ohare_mb_power(struct media_bay_info* bay, int on_off)
 209 {
 210         if (on_off) {
 211                 /* Power up device, assert it's reset line */
 212                 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
 213                 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
 214         } else {
 215                 /* Disable all devices */
 216                 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
 217                 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
 218                 /* Cut power from bay, release reset line */
 219                 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
 220                 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
 221                 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
 222         }
 223         MB_BIC(bay, OHARE_MBCR, 0x00000F00);
 224 }
 225
 226 static void
 227 heathrow_mb_power(struct media_bay_info* bay, int on_off)
 228 {
 229         if (on_off) {
 230                 /* Power up device, assert it's reset line */
 231                 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
 232                 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
 233         } else {
 234                 /* Disable all devices */
 235                 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
 236                 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
 237                 /* Cut power from bay, release reset line */
 238                 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
 239                 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
 240                 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
 241         }
 242         MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
 243 }
 244
 245 static void
 246 keylargo_mb_power(struct media_bay_info* bay, int on_off)
 247 {
 248         if (on_off) {
 249                 /* Power up device, assert it's reset line */
 250                 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
 251                 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
 252         } else {
 253                 /* Disable all devices */
 254                 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
 255                 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
 256                 /* Cut power from bay, release reset line */
 257                 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
 258                 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
 259                 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
 260         }
 261         MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
 262 }
 263
 264 /*
 265  * Functions for configuring the media bay for a given type of device,
 266  * enable the related busses
 267  */
 268
 269 static int
 270 ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
 271 {
 272         switch(device_id) {
 273                 case MB_FD:
 274                 case MB_FD1:
 275                         MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
 276                         MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
 277                         return 0;
 278                 case MB_CD:
 279                         MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
 280                         MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
 281                         return 0;
 282                 case MB_PCI:
 283                         MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
 284                         return 0;
 285         }
 286         return -ENODEV;
 287 }
 288
 289 static int
 290 heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
 291 {
 292         switch(device_id) {
 293                 case MB_FD:
 294                 case MB_FD1:
 295                         MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
 296                         MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
 297                         return 0;
 298                 case MB_CD:
 299                         MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
 300                         MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
 301                         return 0;
 302                 case MB_PCI:
 303                         MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
 304                         return 0;
 305         }
 306         return -ENODEV;
 307 }
 308
 309 static int
 310 keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
 311 {
 312         switch(device_id) {
 313                 case MB_CD:
 314                         MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
 315                         MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
 316                         MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
 317                         return 0;
 318                 case MB_PCI:
 319                         MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
 320                         return 0;
 321                 case MB_SOUND:
 322                         MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
 323                         return 0;
 324         }
 325         return -ENODEV;
 326 }
 327
 328 /*
 329  * Functions for tweaking resets
 330  */
 331
 332 static void
 333 ohare_mb_un_reset(struct media_bay_info* bay)
 334 {
 335         MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
 336 }
 337
 338 static void keylargo_mb_init(struct media_bay_info *bay)
 339 {
 340         MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
 341 }
 342
 343 static void heathrow_mb_un_reset(struct media_bay_info* bay)
 344 {
 345         MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
 346 }
 347
 348 static void keylargo_mb_un_reset(struct media_bay_info* bay)
 349 {
 350         MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
 351 }
 352
 353 static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
 354 {
 355         MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
 356 }
 357
 358 static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
 359 {
 360         MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
 361 }
 362
 363 static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
 364 {
 365         MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
 366 }
 367
 368 static inline void set_mb_power(struct media_bay_info* bay, int onoff)
 369 {
 370         /* Power up up and assert the bay reset line */
 371         if (onoff) {
 372                 bay->ops->power(bay, 1);
 373                 bay->state = mb_powering_up;
 374                 MBDBG("mediabay%d: powering up\n", bay->index);
 375         } else {
 376                 /* Make sure everything is powered down & disabled */
 377                 bay->ops->power(bay, 0);
 378                 bay->state = mb_powering_down;
 379                 MBDBG("mediabay%d: powering down\n", bay->index);
 380         }
 381         bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
 382 }
 383
 384 static void poll_media_bay(struct media_bay_info* bay)
 385 {
 386         int id = bay->ops->content(bay);
 387
 388         if (id == bay->last_value) {
 389                 if (id != bay->content_id) {
 390                         bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
 391                         if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
 392                                 /* If the device type changes without going thru
 393                                  * "MB_NO", we force a pass by "MB_NO" to make sure
 394                                  * things are properly reset
 395                                  */
 396                                 if ((id != MB_NO) && (bay->content_id != MB_NO)) {
 397                                         id = MB_NO;
 398                                         MBDBG("mediabay%d: forcing MB_NO\n", bay->index);
 399                                 }
 400                                 MBDBG("mediabay%d: switching to %d\n", bay->index, id);
 401                                 set_mb_power(bay, id != MB_NO);
 402                                 bay->content_id = id;
 403                                 if (id == MB_NO) {
 404 #ifdef CONFIG_BLK_DEV_IDE
 405                                         bay->cd_retry = 0;
 406 #endif
 407                                         printk(KERN_INFO "media bay %d is empty\n", bay->index);
 408                                 }
 409                         }
 410                 }
 411         } else {
 412                 bay->last_value = id;
 413                 bay->value_count = 0;
 414         }
 415 }
 416
 417 int check_media_bay(struct device_node *which_bay, int what)
 418 {
 419 #ifdef CONFIG_BLK_DEV_IDE
 420         int     i;
 421
 422         for (i=0; i<media_bay_count; i++)
 423                 if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) {
 424                         if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
 425                                 return 0;
 426                         media_bays[i].cd_index = -1;
 427                         return -EINVAL;
 428                 }
 429 #endif /* CONFIG_BLK_DEV_IDE */
 430         return -ENODEV;
 431 }
 432 EXPORT_SYMBOL(check_media_bay);
 433
 434 int check_media_bay_by_base(unsigned long base, int what)
 435 {
 436 #ifdef CONFIG_BLK_DEV_IDE
 437         int     i;
 438
 439         for (i=0; i<media_bay_count; i++)
 440                 if (media_bays[i].mdev && base == (unsigned long) media_bays[i].cd_base) {
 441                         if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
 442                                 return 0;
 443                         media_bays[i].cd_index = -1;
 444                         return -EINVAL;
 445                 }
 446 #endif
 447
 448         return -ENODEV;
 449 }
 450
 451 int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
 452         int irq, int index)
 453 {
 454 #ifdef CONFIG_BLK_DEV_IDE
 455         int     i;
 456
 457         for (i=0; i<media_bay_count; i++) {
 458                 struct media_bay_info* bay = &media_bays[i];
 459
 460                 if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
 461                         int timeout = 5000;
 462
 463                         down(&bay->lock);
 464
 465                         bay->cd_base    = (void __iomem *) base;
 466                         bay->cd_irq     = irq;
 467
 468                         if ((MB_CD != bay->content_id) || bay->state != mb_up) {
 469                                 up(&bay->lock);
 470                                 return 0;
 471                         }
 472                         printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i);
 473                         do {
 474                                 if (MB_IDE_READY(i)) {
 475                                         bay->cd_index   = index;
 476                                         up(&bay->lock);
 477                                         return 0;
 478                                 }
 479                                 mdelay(1);
 480                         } while(--timeout);
 481                         printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
 482                         up(&bay->lock);
 483                         return -ENODEV;
 484                 }
 485         }
 486 #endif /* CONFIG_BLK_DEV_IDE */
 487
 488         return -ENODEV;
 489 }
 490
 491 static void media_bay_step(int i)
 492 {
 493         struct media_bay_info* bay = &media_bays[i];
 494
 495         /* We don't poll when powering down */
 496         if (bay->state != mb_powering_down)
 497             poll_media_bay(bay);
 498
 499         /* If timer expired or polling IDE busy, run state machine */
 500         if ((bay->state != mb_ide_waiting) && (bay->timer != 0)) {
 501                 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
 502                 if (bay->timer > 0)
 503                         return;
 504                 bay->timer = 0;
 505         }
 506
 507         switch(bay->state) {
 508         case mb_powering_up:
 509                 if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
 510                         MBDBG("mediabay%d: device not supported (kind:%d)\n", i, bay->content_id);
 511                         set_mb_power(bay, 0);
 512                         break;
 513                 }
 514                 bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
 515                 bay->state = mb_enabling_bay;
 516                 MBDBG("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
 517                 break;
 518         case mb_enabling_bay:
 519                 bay->ops->un_reset(bay);
 520                 bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);
 521                 bay->state = mb_resetting;
 522                 MBDBG("mediabay%d: waiting reset (kind:%d)\n", i, bay->content_id);
 523                 break;
 524
 525         case mb_resetting:
 526                 if (bay->content_id != MB_CD) {
 527                         MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
 528                         bay->state = mb_up;
 529                         break;
 530                 }
 531 #ifdef CONFIG_BLK_DEV_IDE
 532                 MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id);
 533                 bay->ops->un_reset_ide(bay);
 534                 bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
 535                 bay->state = mb_ide_resetting;
 536 #else
 537                 printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i);
 538                 set_mb_power(bay, 0);
 539 #endif /* CONFIG_BLK_DEV_IDE */
 540                 break;
 541
 542 #ifdef CONFIG_BLK_DEV_IDE
 543         case mb_ide_resetting:
 544                 bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT);
 545                 bay->state = mb_ide_waiting;
 546                 MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id);
 547                 break;
 548
 549         case mb_ide_waiting:
 550                 if (bay->cd_base == NULL) {
 551                         bay->timer = 0;
 552                         bay->state = mb_up;
 553                         MBDBG("mediabay%d: up before IDE init\n", i);
 554                         break;
 555                 } else if (MB_IDE_READY(i)) {
 556                         bay->timer = 0;
 557                         bay->state = mb_up;
 558                         if (bay->cd_index < 0) {
 559                                 hw_regs_t hw;
 560
 561                                 printk("mediabay %d, registering IDE...\n", i);
 562                                 pmu_suspend();
 563                                 ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL);
 564                                 hw.irq = bay->cd_irq;
 565                                 hw.chipset = ide_pmac;
 566                                 bay->cd_index = ide_register_hw(&hw, NULL, 0, NULL);
 567                                 pmu_resume();
 568                         }
 569                         if (bay->cd_index == -1) {
 570                                 /* We eventually do a retry */
 571                                 bay->cd_retry++;
 572                                 printk("IDE register error\n");
 573                                 set_mb_power(bay, 0);
 574                         } else {
 575                                 printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index);
 576                                 MBDBG("mediabay %d IDE ready\n", i);
 577                         }
 578                         break;
 579                 } else if (bay->timer > 0)
 580                         bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
 581                 if (bay->timer <= 0) {
 582                         printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n",
 583                                i, readb(bay->cd_base + 0x70));
 584                         MBDBG("mediabay%d: nIDE Timeout !\n", i);
 585                         set_mb_power(bay, 0);
 586                         bay->timer = 0;
 587                 }
 588                 break;
 589 #endif /* CONFIG_BLK_DEV_IDE */
 590
 591         case mb_powering_down:
 592                 bay->state = mb_empty;
 593 #ifdef CONFIG_BLK_DEV_IDE
 594                 if (bay->cd_index >= 0) {
 595                         printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
 596                                bay->cd_index);
 597                         ide_unregister(bay->cd_index);
 598                         bay->cd_index = -1;
 599                 }
 600                 if (bay->cd_retry) {
 601                         if (bay->cd_retry > MAX_CD_RETRIES) {
 602                                 /* Should add an error sound (sort of beep in dmasound) */
 603                                 printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i);
 604                         } else {
 605                                 /* Force a new power down/up sequence */
 606                                 bay->content_id = MB_NO;
 607                         }
 608                 }
 609 #endif /* CONFIG_BLK_DEV_IDE */
 610                 MBDBG("mediabay%d: end of power down\n", i);
 611                 break;
 612         }
 613 }
 614
 615 /*
 616  * This procedure runs as a kernel thread to poll the media bay
 617  * once each tick and register and unregister the IDE interface
 618  * with the IDE driver.  It needs to be a thread because
 619  * ide_register can't be called from interrupt context.
 620  */
 621 static int media_bay_task(void *x)
 622 {
 623         int     i;
 624
 625         while (!kthread_should_stop()) {
 626                 for (i = 0; i < media_bay_count; ++i) {
 627                         down(&media_bays[i].lock);
 628                         if (!media_bays[i].sleeping)
 629                                 media_bay_step(i);
 630                         up(&media_bays[i].lock);
 631                 }
 632
 633                 msleep_interruptible(MB_POLL_DELAY);
 634         }
 635         return 0;
 636 }
 637
 638 static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
 639 {
 640         struct media_bay_info* bay;
 641         u32 __iomem *regbase;
 642         struct device_node *ofnode;
 643         unsigned long base;
 644         int i;
 645
 646         ofnode = mdev->ofdev.node;
 647
 648         if (macio_resource_count(mdev) < 1)
 649                 return -ENODEV;
 650         if (macio_request_resources(mdev, "media-bay"))
 651                 return -EBUSY;
 652         /* Media bay registers are located at the beginning of the
 653          * mac-io chip, for now, we trick and align down the first
 654          * resource passed in
 655          */
 656         base = macio_resource_start(mdev, 0) & 0xffff0000u;
 657         regbase = (u32 __iomem *)ioremap(base, 0x100);
 658         if (regbase == NULL) {
 659                 macio_release_resources(mdev);
 660                 return -ENOMEM;
 661         }
 662
 663         i = media_bay_count++;
 664         bay = &media_bays[i];
 665         bay->mdev = mdev;
 666         bay->base = regbase;
 667         bay->index = i;
 668         bay->ops = match->data;
 669         bay->sleeping = 0;
 670         init_MUTEX(&bay->lock);
 671
 672         /* Init HW probing */
 673         if (bay->ops->init)
 674                 bay->ops->init(bay);
 675
 676         printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
 677
 678         /* Force an immediate detect */
 679         set_mb_power(bay, 0);
 680         msleep(MB_POWER_DELAY);
 681         bay->content_id = MB_NO;
 682         bay->last_value = bay->ops->content(bay);
 683         bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
 684         bay->state = mb_empty;
 685         do {
 686                 msleep(MB_POLL_DELAY);
 687                 media_bay_step(i);
 688         } while((bay->state != mb_empty) &&
 689                 (bay->state != mb_up));
 690
 691         /* Mark us ready by filling our mdev data */
 692         macio_set_drvdata(mdev, bay);
 693
 694         /* Startup kernel thread */
 695         if (i == 0)
 696                 kthread_run(media_bay_task, NULL, "media-bay");
 697
 698         return 0;
 699
 700 }
 701
 702 static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
 703 {
 704         struct media_bay_info   *bay = macio_get_drvdata(mdev);
 705
 706         if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) {
 707                 down(&bay->lock);
 708                 bay->sleeping = 1;
 709                 set_mb_power(bay, 0);
 710                 up(&bay->lock);
 711                 msleep(MB_POLL_DELAY);
 712                 mdev->ofdev.dev.power.power_state = state;
 713         }
 714         return 0;
 715 }
 716
 717 static int media_bay_resume(struct macio_dev *mdev)
 718 {
 719         struct media_bay_info   *bay = macio_get_drvdata(mdev);
 720
 721         if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
 722                 mdev->ofdev.dev.power.power_state = PMSG_ON;
 723
 724                 /* We re-enable the bay using it's previous content
 725                    only if it did not change. Note those bozo timings,
 726                    they seem to help the 3400 get it right.
 727                  */
 728                 /* Force MB power to 0 */
 729                 down(&bay->lock);
 730                 set_mb_power(bay, 0);
 731                 msleep(MB_POWER_DELAY);
 732                 if (bay->ops->content(bay) != bay->content_id) {
 733                         printk("mediabay%d: content changed during sleep...\n", bay->index);
 734                         up(&bay->lock);
 735                         return 0;
 736                 }
 737                 set_mb_power(bay, 1);
 738                 bay->last_value = bay->content_id;
 739                 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
 740                 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
 741 #ifdef CONFIG_BLK_DEV_IDE
 742                 bay->cd_retry = 0;
 743 #endif
 744                 do {
 745                         msleep(MB_POLL_DELAY);
 746                         media_bay_step(bay->index);
 747                 } while((bay->state != mb_empty) &&
 748                         (bay->state != mb_up));
 749                 bay->sleeping = 0;
 750                 up(&bay->lock);
 751         }
 752         return 0;
 753 }
 754
 755
 756 /* Definitions of "ops" structures.
 757  */
 758 static struct mb_ops ohare_mb_ops = {
 759         .name           = "Ohare",
 760         .content        = ohare_mb_content,
 761         .power          = ohare_mb_power,
 762         .setup_bus      = ohare_mb_setup_bus,
 763         .un_reset       = ohare_mb_un_reset,
 764         .un_reset_ide   = ohare_mb_un_reset_ide,
 765 };
 766
 767 static struct mb_ops heathrow_mb_ops = {
 768         .name           = "Heathrow",
 769         .content        = heathrow_mb_content,
 770         .power          = heathrow_mb_power,
 771         .setup_bus      = heathrow_mb_setup_bus,
 772         .un_reset       = heathrow_mb_un_reset,
 773         .un_reset_ide   = heathrow_mb_un_reset_ide,
 774 };
 775
 776 static struct mb_ops keylargo_mb_ops = {
 777         .name           = "KeyLargo",
 778         .init           = keylargo_mb_init,
 779         .content        = keylargo_mb_content,
 780         .power          = keylargo_mb_power,
 781         .setup_bus      = keylargo_mb_setup_bus,
 782         .un_reset       = keylargo_mb_un_reset,
 783         .un_reset_ide   = keylargo_mb_un_reset_ide,
 784 };
 785
 786 /*
 787  * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
 788  * register is always set when there is something in the media bay.
 789  * This causes problems for the interrupt code if we attach an interrupt
 790  * handler to the media-bay interrupt, because it tends to go into
 791  * an infinite loop calling the media bay interrupt handler.
 792  * Therefore we do it all by polling the media bay once each tick.
 793  */
 794
 795 static struct of_device_id media_bay_match[] =
 796 {
 797         {
 798         .name           = "media-bay",
 799         .compatible     = "keylargo-media-bay",
 800         .data           = &keylargo_mb_ops,
 801         },
 802         {
 803         .name           = "media-bay",
 804         .compatible     = "heathrow-media-bay",
 805         .data           = &heathrow_mb_ops,
 806         },
 807         {
 808         .name           = "media-bay",
 809         .compatible     = "ohare-media-bay",
 810         .data           = &ohare_mb_ops,
 811         },
 812         {},
 813 };
 814
 815 static struct macio_driver media_bay_driver =
 816 {
 817         .name           = "media-bay",
 818         .match_table    = media_bay_match,
 819         .probe          = media_bay_attach,
 820         .suspend        = media_bay_suspend,
 821         .resume         = media_bay_resume
 822 };
 823
 824 static int __init media_bay_init(void)
 825 {
 826         int i;
 827
 828         for (i=0; i<MAX_BAYS; i++) {
 829                 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
 830                 media_bays[i].content_id        = -1;
 831 #ifdef CONFIG_BLK_DEV_IDE
 832                 media_bays[i].cd_index          = -1;
 833 #endif
 834         }
 835         if (!machine_is(powermac))
 836                 return 0;
 837
 838         macio_register_driver(&media_bay_driver);
 839
 840         return 0;
 841 }
 842
 843 device_initcall(media_bay_init);