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