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 = 567 ide_register_hw(&hw, NULL, NULL); 568 pmu_resume(); 569 } 570 if (bay->cd_index == -1) { 571 /* We eventually do a retry */ 572 bay->cd_retry++; 573 printk("IDE register error\n"); 574 set_mb_power(bay, 0); 575 } else { 576 printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index); 577 MBDBG("mediabay %d IDE ready\n", i); 578 } 579 break; 580 } else if (bay->timer > 0) 581 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); 582 if (bay->timer <= 0) { 583 printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n", 584 i, readb(bay->cd_base + 0x70)); 585 MBDBG("mediabay%d: nIDE Timeout !\n", i); 586 set_mb_power(bay, 0); 587 bay->timer = 0; 588 } 589 break; 590 #endif /* CONFIG_BLK_DEV_IDE */ 591 592 case mb_powering_down: 593 bay->state = mb_empty; 594 #ifdef CONFIG_BLK_DEV_IDE 595 if (bay->cd_index >= 0) { 596 printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i, 597 bay->cd_index); 598 ide_unregister(bay->cd_index, 1, 1); 599 bay->cd_index = -1; 600 } 601 if (bay->cd_retry) { 602 if (bay->cd_retry > MAX_CD_RETRIES) { 603 /* Should add an error sound (sort of beep in dmasound) */ 604 printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i); 605 } else { 606 /* Force a new power down/up sequence */ 607 bay->content_id = MB_NO; 608 } 609 } 610 #endif /* CONFIG_BLK_DEV_IDE */ 611 MBDBG("mediabay%d: end of power down\n", i); 612 break; 613 } 614 } 615 616 /* 617 * This procedure runs as a kernel thread to poll the media bay 618 * once each tick and register and unregister the IDE interface 619 * with the IDE driver. It needs to be a thread because 620 * ide_register can't be called from interrupt context. 621 */ 622 static int media_bay_task(void *x) 623 { 624 int i; 625 626 while (!kthread_should_stop()) { 627 for (i = 0; i < media_bay_count; ++i) { 628 down(&media_bays[i].lock); 629 if (!media_bays[i].sleeping) 630 media_bay_step(i); 631 up(&media_bays[i].lock); 632 } 633 634 msleep_interruptible(MB_POLL_DELAY); 635 } 636 return 0; 637 } 638 639 static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match) 640 { 641 struct media_bay_info* bay; 642 u32 __iomem *regbase; 643 struct device_node *ofnode; 644 unsigned long base; 645 int i; 646 647 ofnode = mdev->ofdev.node; 648 649 if (macio_resource_count(mdev) < 1) 650 return -ENODEV; 651 if (macio_request_resources(mdev, "media-bay")) 652 return -EBUSY; 653 /* Media bay registers are located at the beginning of the 654 * mac-io chip, for now, we trick and align down the first 655 * resource passed in 656 */ 657 base = macio_resource_start(mdev, 0) & 0xffff0000u; 658 regbase = (u32 __iomem *)ioremap(base, 0x100); 659 if (regbase == NULL) { 660 macio_release_resources(mdev); 661 return -ENOMEM; 662 } 663 664 i = media_bay_count++; 665 bay = &media_bays[i]; 666 bay->mdev = mdev; 667 bay->base = regbase; 668 bay->index = i; 669 bay->ops = match->data; 670 bay->sleeping = 0; 671 init_MUTEX(&bay->lock); 672 673 /* Init HW probing */ 674 if (bay->ops->init) 675 bay->ops->init(bay); 676 677 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); 678 679 /* Force an immediate detect */ 680 set_mb_power(bay, 0); 681 msleep(MB_POWER_DELAY); 682 bay->content_id = MB_NO; 683 bay->last_value = bay->ops->content(bay); 684 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 685 bay->state = mb_empty; 686 do { 687 msleep(MB_POLL_DELAY); 688 media_bay_step(i); 689 } while((bay->state != mb_empty) && 690 (bay->state != mb_up)); 691 692 /* Mark us ready by filling our mdev data */ 693 macio_set_drvdata(mdev, bay); 694 695 /* Startup kernel thread */ 696 if (i == 0) 697 kthread_run(media_bay_task, NULL, "media-bay"); 698 699 return 0; 700 701 } 702 703 static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state) 704 { 705 struct media_bay_info *bay = macio_get_drvdata(mdev); 706 707 if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) { 708 down(&bay->lock); 709 bay->sleeping = 1; 710 set_mb_power(bay, 0); 711 up(&bay->lock); 712 msleep(MB_POLL_DELAY); 713 mdev->ofdev.dev.power.power_state = state; 714 } 715 return 0; 716 } 717 718 static int media_bay_resume(struct macio_dev *mdev) 719 { 720 struct media_bay_info *bay = macio_get_drvdata(mdev); 721 722 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) { 723 mdev->ofdev.dev.power.power_state = PMSG_ON; 724 725 /* We re-enable the bay using it's previous content 726 only if it did not change. Note those bozo timings, 727 they seem to help the 3400 get it right. 728 */ 729 /* Force MB power to 0 */ 730 down(&bay->lock); 731 set_mb_power(bay, 0); 732 msleep(MB_POWER_DELAY); 733 if (bay->ops->content(bay) != bay->content_id) { 734 printk("mediabay%d: content changed during sleep...\n", bay->index); 735 up(&bay->lock); 736 return 0; 737 } 738 set_mb_power(bay, 1); 739 bay->last_value = bay->content_id; 740 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 741 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 742 #ifdef CONFIG_BLK_DEV_IDE 743 bay->cd_retry = 0; 744 #endif 745 do { 746 msleep(MB_POLL_DELAY); 747 media_bay_step(bay->index); 748 } while((bay->state != mb_empty) && 749 (bay->state != mb_up)); 750 bay->sleeping = 0; 751 up(&bay->lock); 752 } 753 return 0; 754 } 755 756 757 /* Definitions of "ops" structures. 758 */ 759 static struct mb_ops ohare_mb_ops = { 760 .name = "Ohare", 761 .content = ohare_mb_content, 762 .power = ohare_mb_power, 763 .setup_bus = ohare_mb_setup_bus, 764 .un_reset = ohare_mb_un_reset, 765 .un_reset_ide = ohare_mb_un_reset_ide, 766 }; 767 768 static struct mb_ops heathrow_mb_ops = { 769 .name = "Heathrow", 770 .content = heathrow_mb_content, 771 .power = heathrow_mb_power, 772 .setup_bus = heathrow_mb_setup_bus, 773 .un_reset = heathrow_mb_un_reset, 774 .un_reset_ide = heathrow_mb_un_reset_ide, 775 }; 776 777 static struct mb_ops keylargo_mb_ops = { 778 .name = "KeyLargo", 779 .init = keylargo_mb_init, 780 .content = keylargo_mb_content, 781 .power = keylargo_mb_power, 782 .setup_bus = keylargo_mb_setup_bus, 783 .un_reset = keylargo_mb_un_reset, 784 .un_reset_ide = keylargo_mb_un_reset_ide, 785 }; 786 787 /* 788 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL 789 * register is always set when there is something in the media bay. 790 * This causes problems for the interrupt code if we attach an interrupt 791 * handler to the media-bay interrupt, because it tends to go into 792 * an infinite loop calling the media bay interrupt handler. 793 * Therefore we do it all by polling the media bay once each tick. 794 */ 795 796 static struct of_device_id media_bay_match[] = 797 { 798 { 799 .name = "media-bay", 800 .compatible = "keylargo-media-bay", 801 .data = &keylargo_mb_ops, 802 }, 803 { 804 .name = "media-bay", 805 .compatible = "heathrow-media-bay", 806 .data = &heathrow_mb_ops, 807 }, 808 { 809 .name = "media-bay", 810 .compatible = "ohare-media-bay", 811 .data = &ohare_mb_ops, 812 }, 813 {}, 814 }; 815 816 static struct macio_driver media_bay_driver = 817 { 818 .name = "media-bay", 819 .match_table = media_bay_match, 820 .probe = media_bay_attach, 821 .suspend = media_bay_suspend, 822 .resume = media_bay_resume 823 }; 824 825 static int __init media_bay_init(void) 826 { 827 int i; 828 829 for (i=0; i<MAX_BAYS; i++) { 830 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); 831 media_bays[i].content_id = -1; 832 #ifdef CONFIG_BLK_DEV_IDE 833 media_bays[i].cd_index = -1; 834 #endif 835 } 836 if (!machine_is(powermac)) 837 return 0; 838 839 macio_register_driver(&media_bay_driver); 840 841 return 0; 842 } 843 844 device_initcall(media_bay_init); 845