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