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/config.h> 14 #include <linux/types.h> 15 #include <linux/errno.h> 16 #include <linux/kernel.h> 17 #include <linux/delay.h> 18 #include <linux/sched.h> 19 #include <linux/timer.h> 20 #include <linux/hdreg.h> 21 #include <linux/stddef.h> 22 #include <linux/init.h> 23 #include <linux/ide.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 #define MB_IGNORE_SIGNALS 40 41 #ifdef MB_DEBUG 42 #define MBDBG(fmt, arg...) printk(KERN_INFO fmt , ## arg) 43 #else 44 #define MBDBG(fmt, arg...) do { } while (0) 45 #endif 46 47 #define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2)) 48 #define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r)) 49 50 #define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r))) 51 #define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v))) 52 #define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v))) 53 #define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v))) 54 #define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r))) 55 #define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v))) 56 57 struct media_bay_info; 58 59 struct mb_ops { 60 char* name; 61 void (*init)(struct media_bay_info *bay); 62 u8 (*content)(struct media_bay_info *bay); 63 void (*power)(struct media_bay_info *bay, int on_off); 64 int (*setup_bus)(struct media_bay_info *bay, u8 device_id); 65 void (*un_reset)(struct media_bay_info *bay); 66 void (*un_reset_ide)(struct media_bay_info *bay); 67 }; 68 69 struct media_bay_info { 70 u32 __iomem *base; 71 int content_id; 72 int state; 73 int last_value; 74 int value_count; 75 int timer; 76 struct macio_dev *mdev; 77 struct mb_ops* ops; 78 int index; 79 int cached_gpio; 80 int sleeping; 81 struct semaphore lock; 82 #ifdef CONFIG_BLK_DEV_IDE 83 void __iomem *cd_base; 84 int cd_index; 85 int cd_irq; 86 int cd_retry; 87 #endif 88 }; 89 90 #define MAX_BAYS 2 91 92 static struct media_bay_info media_bays[MAX_BAYS]; 93 int media_bay_count = 0; 94 95 #ifdef CONFIG_BLK_DEV_IDE 96 /* check the busy bit in the media-bay ide interface 97 (assumes the media-bay contains an ide device) */ 98 #define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0) 99 #endif 100 101 /* 102 * Wait that number of ms between each step in normal polling mode 103 */ 104 #define MB_POLL_DELAY 25 105 106 /* 107 * Consider the media-bay ID value stable if it is the same for 108 * this number of milliseconds 109 */ 110 #define MB_STABLE_DELAY 100 111 112 /* Wait after powering up the media bay this delay in ms 113 * timeout bumped for some powerbooks 114 */ 115 #define MB_POWER_DELAY 200 116 117 /* 118 * Hold the media-bay reset signal true for this many ticks 119 * after a device is inserted before releasing it. 120 */ 121 #define MB_RESET_DELAY 50 122 123 /* 124 * Wait this long after the reset signal is released and before doing 125 * further operations. After this delay, the IDE reset signal is released 126 * too for an IDE device 127 */ 128 #define MB_SETUP_DELAY 100 129 130 /* 131 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted 132 * (or until the device is ready) before waiting for busy bit to disappear 133 */ 134 #define MB_IDE_WAIT 1000 135 136 /* 137 * Timeout waiting for busy bit of an IDE device to go down 138 */ 139 #define MB_IDE_TIMEOUT 5000 140 141 /* 142 * Max retries of the full power up/down sequence for an IDE device 143 */ 144 #define MAX_CD_RETRIES 3 145 146 /* 147 * States of a media bay 148 */ 149 enum { 150 mb_empty = 0, /* Idle */ 151 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */ 152 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */ 153 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */ 154 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */ 155 mb_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */ 156 mb_up, /* Media bay full */ 157 mb_powering_down /* Powering down (avoid too fast down/up) */ 158 }; 159 160 #define MB_POWER_SOUND 0x08 161 #define MB_POWER_FLOPPY 0x04 162 #define MB_POWER_ATA 0x02 163 #define MB_POWER_PCI 0x01 164 #define MB_POWER_OFF 0x00 165 166 /* 167 * Functions for polling content of media bay 168 */ 169 170 static u8 __pmac 171 ohare_mb_content(struct media_bay_info *bay) 172 { 173 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; 174 } 175 176 static u8 __pmac 177 heathrow_mb_content(struct media_bay_info *bay) 178 { 179 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; 180 } 181 182 static u8 __pmac 183 keylargo_mb_content(struct media_bay_info *bay) 184 { 185 int new_gpio; 186 187 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA; 188 if (new_gpio) { 189 bay->cached_gpio = new_gpio; 190 return MB_NO; 191 } else if (bay->cached_gpio != new_gpio) { 192 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); 193 (void)MB_IN32(bay, KEYLARGO_MBCR); 194 udelay(5); 195 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); 196 (void)MB_IN32(bay, KEYLARGO_MBCR); 197 udelay(5); 198 bay->cached_gpio = new_gpio; 199 } 200 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7; 201 } 202 203 /* 204 * Functions for powering up/down the bay, puts the bay device 205 * into reset state as well 206 */ 207 208 static void __pmac 209 ohare_mb_power(struct media_bay_info* bay, int on_off) 210 { 211 if (on_off) { 212 /* Power up device, assert it's reset line */ 213 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N); 214 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N); 215 } else { 216 /* Disable all devices */ 217 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK); 218 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE); 219 /* Cut power from bay, release reset line */ 220 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N); 221 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); 222 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); 223 } 224 MB_BIC(bay, OHARE_MBCR, 0x00000F00); 225 } 226 227 static void __pmac 228 heathrow_mb_power(struct media_bay_info* bay, int on_off) 229 { 230 if (on_off) { 231 /* Power up device, assert it's reset line */ 232 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 233 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N); 234 } else { 235 /* Disable all devices */ 236 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK); 237 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); 238 /* Cut power from bay, release reset line */ 239 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N); 240 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 241 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 242 } 243 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00); 244 } 245 246 static void __pmac 247 keylargo_mb_power(struct media_bay_info* bay, int on_off) 248 { 249 if (on_off) { 250 /* Power up device, assert it's reset line */ 251 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 252 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); 253 } else { 254 /* Disable all devices */ 255 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK); 256 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); 257 /* Cut power from bay, release reset line */ 258 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); 259 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 260 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 261 } 262 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); 263 } 264 265 /* 266 * Functions for configuring the media bay for a given type of device, 267 * enable the related busses 268 */ 269 270 static int __pmac 271 ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 272 { 273 switch(device_id) { 274 case MB_FD: 275 case MB_FD1: 276 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE); 277 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE); 278 return 0; 279 case MB_CD: 280 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N); 281 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE); 282 return 0; 283 case MB_PCI: 284 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE); 285 return 0; 286 } 287 return -ENODEV; 288 } 289 290 static int __pmac 291 heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 292 { 293 switch(device_id) { 294 case MB_FD: 295 case MB_FD1: 296 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE); 297 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); 298 return 0; 299 case MB_CD: 300 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 301 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE); 302 return 0; 303 case MB_PCI: 304 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE); 305 return 0; 306 } 307 return -ENODEV; 308 } 309 310 static int __pmac 311 keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id) 312 { 313 switch(device_id) { 314 case MB_CD: 315 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE); 316 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 317 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); 318 return 0; 319 case MB_PCI: 320 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE); 321 return 0; 322 case MB_SOUND: 323 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE); 324 return 0; 325 } 326 return -ENODEV; 327 } 328 329 /* 330 * Functions for tweaking resets 331 */ 332 333 static void __pmac 334 ohare_mb_un_reset(struct media_bay_info* bay) 335 { 336 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); 337 } 338 339 static void __pmac keylargo_mb_init(struct media_bay_info *bay) 340 { 341 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); 342 } 343 344 static void __pmac heathrow_mb_un_reset(struct media_bay_info* bay) 345 { 346 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); 347 } 348 349 static void __pmac keylargo_mb_un_reset(struct media_bay_info* bay) 350 { 351 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); 352 } 353 354 static void __pmac ohare_mb_un_reset_ide(struct media_bay_info* bay) 355 { 356 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); 357 } 358 359 static void __pmac heathrow_mb_un_reset_ide(struct media_bay_info* bay) 360 { 361 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); 362 } 363 364 static void __pmac keylargo_mb_un_reset_ide(struct media_bay_info* bay) 365 { 366 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); 367 } 368 369 static inline void __pmac set_mb_power(struct media_bay_info* bay, int onoff) 370 { 371 /* Power up up and assert the bay reset line */ 372 if (onoff) { 373 bay->ops->power(bay, 1); 374 bay->state = mb_powering_up; 375 MBDBG("mediabay%d: powering up\n", bay->index); 376 } else { 377 /* Make sure everything is powered down & disabled */ 378 bay->ops->power(bay, 0); 379 bay->state = mb_powering_down; 380 MBDBG("mediabay%d: powering down\n", bay->index); 381 } 382 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 383 } 384 385 static void __pmac poll_media_bay(struct media_bay_info* bay) 386 { 387 int id = bay->ops->content(bay); 388 389 if (id == bay->last_value) { 390 if (id != bay->content_id) { 391 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY); 392 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) { 393 /* If the device type changes without going thru 394 * "MB_NO", we force a pass by "MB_NO" to make sure 395 * things are properly reset 396 */ 397 if ((id != MB_NO) && (bay->content_id != MB_NO)) { 398 id = MB_NO; 399 MBDBG("mediabay%d: forcing MB_NO\n", bay->index); 400 } 401 MBDBG("mediabay%d: switching to %d\n", bay->index, id); 402 set_mb_power(bay, id != MB_NO); 403 bay->content_id = id; 404 if (id == MB_NO) { 405 #ifdef CONFIG_BLK_DEV_IDE 406 bay->cd_retry = 0; 407 #endif 408 printk(KERN_INFO "media bay %d is empty\n", bay->index); 409 } 410 } 411 } 412 } else { 413 bay->last_value = id; 414 bay->value_count = 0; 415 } 416 } 417 418 int __pmac check_media_bay(struct device_node *which_bay, int what) 419 { 420 #ifdef CONFIG_BLK_DEV_IDE 421 int i; 422 423 for (i=0; i<media_bay_count; i++) 424 if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) { 425 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up) 426 return 0; 427 media_bays[i].cd_index = -1; 428 return -EINVAL; 429 } 430 #endif /* CONFIG_BLK_DEV_IDE */ 431 return -ENODEV; 432 } 433 EXPORT_SYMBOL(check_media_bay); 434 435 int __pmac check_media_bay_by_base(unsigned long base, int what) 436 { 437 #ifdef CONFIG_BLK_DEV_IDE 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 #endif 448 449 return -ENODEV; 450 } 451 452 int __pmac media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base, 453 int irq, int index) 454 { 455 #ifdef CONFIG_BLK_DEV_IDE 456 int i; 457 458 for (i=0; i<media_bay_count; i++) { 459 struct media_bay_info* bay = &media_bays[i]; 460 461 if (bay->mdev && which_bay == bay->mdev->ofdev.node) { 462 int timeout = 5000; 463 464 down(&bay->lock); 465 466 bay->cd_base = (void __iomem *) base; 467 bay->cd_irq = irq; 468 469 if ((MB_CD != bay->content_id) || bay->state != mb_up) { 470 up(&bay->lock); 471 return 0; 472 } 473 printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i); 474 do { 475 if (MB_IDE_READY(i)) { 476 bay->cd_index = index; 477 up(&bay->lock); 478 return 0; 479 } 480 mdelay(1); 481 } while(--timeout); 482 printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i); 483 up(&bay->lock); 484 return -ENODEV; 485 } 486 } 487 #endif /* CONFIG_BLK_DEV_IDE */ 488 489 return -ENODEV; 490 } 491 492 static void __pmac 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; 525 526 case mb_resetting: 527 if (bay->content_id != MB_CD) { 528 MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id); 529 bay->state = mb_up; 530 break; 531 } 532 #ifdef CONFIG_BLK_DEV_IDE 533 MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id); 534 bay->ops->un_reset_ide(bay); 535 bay->timer = msecs_to_jiffies(MB_IDE_WAIT); 536 bay->state = mb_ide_resetting; 537 #else 538 printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i); 539 set_mb_power(bay, 0); 540 #endif /* CONFIG_BLK_DEV_IDE */ 541 break; 542 543 #ifdef CONFIG_BLK_DEV_IDE 544 case mb_ide_resetting: 545 bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT); 546 bay->state = mb_ide_waiting; 547 MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id); 548 break; 549 550 case mb_ide_waiting: 551 if (bay->cd_base == NULL) { 552 bay->timer = 0; 553 bay->state = mb_up; 554 MBDBG("mediabay%d: up before IDE init\n", i); 555 break; 556 } else if (MB_IDE_READY(i)) { 557 bay->timer = 0; 558 bay->state = mb_up; 559 if (bay->cd_index < 0) { 560 hw_regs_t hw; 561 562 printk("mediabay %d, registering IDE...\n", i); 563 pmu_suspend(); 564 ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL); 565 hw.irq = bay->cd_irq; 566 hw.chipset = ide_pmac; 567 bay->cd_index = ide_register_hw(&hw, 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); 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 __pmac media_bay_task(void *x) 623 { 624 int i; 625 626 strcpy(current->comm, "media-bay"); 627 #ifdef MB_IGNORE_SIGNALS 628 sigfillset(¤t->blocked); 629 #endif 630 631 for (;;) { 632 for (i = 0; i < media_bay_count; ++i) { 633 down(&media_bays[i].lock); 634 if (!media_bays[i].sleeping) 635 media_bay_step(i); 636 up(&media_bays[i].lock); 637 } 638 639 msleep_interruptible(MB_POLL_DELAY); 640 if (signal_pending(current)) 641 return 0; 642 } 643 } 644 645 static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_match *match) 646 { 647 struct media_bay_info* bay; 648 u32 __iomem *regbase; 649 struct device_node *ofnode; 650 int i; 651 652 ofnode = mdev->ofdev.node; 653 654 if (macio_resource_count(mdev) < 1) 655 return -ENODEV; 656 if (macio_request_resources(mdev, "media-bay")) 657 return -EBUSY; 658 /* Media bay registers are located at the beginning of the 659 * mac-io chip, we get the parent address for now (hrm...) 660 */ 661 regbase = (u32 __iomem *) 662 ioremap(ofnode->parent->addrs[0].address, 0x100); 663 if (regbase == NULL) { 664 macio_release_resources(mdev); 665 return -ENOMEM; 666 } 667 668 i = media_bay_count++; 669 bay = &media_bays[i]; 670 bay->mdev = mdev; 671 bay->base = regbase; 672 bay->index = i; 673 bay->ops = match->data; 674 bay->sleeping = 0; 675 init_MUTEX(&bay->lock); 676 677 /* Init HW probing */ 678 if (bay->ops->init) 679 bay->ops->init(bay); 680 681 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); 682 683 /* Force an immediate detect */ 684 set_mb_power(bay, 0); 685 msleep(MB_POWER_DELAY); 686 bay->content_id = MB_NO; 687 bay->last_value = bay->ops->content(bay); 688 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 689 bay->state = mb_empty; 690 do { 691 msleep(MB_POLL_DELAY); 692 media_bay_step(i); 693 } while((bay->state != mb_empty) && 694 (bay->state != mb_up)); 695 696 /* Mark us ready by filling our mdev data */ 697 macio_set_drvdata(mdev, bay); 698 699 /* Startup kernel thread */ 700 if (i == 0) 701 kernel_thread(media_bay_task, NULL, CLONE_KERNEL); 702 703 return 0; 704 705 } 706 707 static int __pmac media_bay_suspend(struct macio_dev *mdev, u32 state) 708 { 709 struct media_bay_info *bay = macio_get_drvdata(mdev); 710 711 if (state != mdev->ofdev.dev.power.power_state && state == PM_SUSPEND_MEM) { 712 down(&bay->lock); 713 bay->sleeping = 1; 714 set_mb_power(bay, 0); 715 up(&bay->lock); 716 msleep(MB_POLL_DELAY); 717 mdev->ofdev.dev.power.power_state = state; 718 } 719 return 0; 720 } 721 722 static int __pmac media_bay_resume(struct macio_dev *mdev) 723 { 724 struct media_bay_info *bay = macio_get_drvdata(mdev); 725 726 if (mdev->ofdev.dev.power.power_state != 0) { 727 mdev->ofdev.dev.power.power_state = 0; 728 729 /* We re-enable the bay using it's previous content 730 only if it did not change. Note those bozo timings, 731 they seem to help the 3400 get it right. 732 */ 733 /* Force MB power to 0 */ 734 down(&bay->lock); 735 set_mb_power(bay, 0); 736 msleep(MB_POWER_DELAY); 737 if (bay->ops->content(bay) != bay->content_id) { 738 printk("mediabay%d: content changed during sleep...\n", bay->index); 739 up(&bay->lock); 740 return 0; 741 } 742 set_mb_power(bay, 1); 743 bay->last_value = bay->content_id; 744 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); 745 bay->timer = msecs_to_jiffies(MB_POWER_DELAY); 746 #ifdef CONFIG_BLK_DEV_IDE 747 bay->cd_retry = 0; 748 #endif 749 do { 750 msleep(MB_POLL_DELAY); 751 media_bay_step(bay->index); 752 } while((bay->state != mb_empty) && 753 (bay->state != mb_up)); 754 bay->sleeping = 0; 755 up(&bay->lock); 756 } 757 return 0; 758 } 759 760 761 /* Definitions of "ops" structures. 762 */ 763 static struct mb_ops ohare_mb_ops __pmacdata = { 764 .name = "Ohare", 765 .content = ohare_mb_content, 766 .power = ohare_mb_power, 767 .setup_bus = ohare_mb_setup_bus, 768 .un_reset = ohare_mb_un_reset, 769 .un_reset_ide = ohare_mb_un_reset_ide, 770 }; 771 772 static struct mb_ops heathrow_mb_ops __pmacdata = { 773 .name = "Heathrow", 774 .content = heathrow_mb_content, 775 .power = heathrow_mb_power, 776 .setup_bus = heathrow_mb_setup_bus, 777 .un_reset = heathrow_mb_un_reset, 778 .un_reset_ide = heathrow_mb_un_reset_ide, 779 }; 780 781 static struct mb_ops keylargo_mb_ops __pmacdata = { 782 .name = "KeyLargo", 783 .init = keylargo_mb_init, 784 .content = keylargo_mb_content, 785 .power = keylargo_mb_power, 786 .setup_bus = keylargo_mb_setup_bus, 787 .un_reset = keylargo_mb_un_reset, 788 .un_reset_ide = keylargo_mb_un_reset_ide, 789 }; 790 791 /* 792 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL 793 * register is always set when there is something in the media bay. 794 * This causes problems for the interrupt code if we attach an interrupt 795 * handler to the media-bay interrupt, because it tends to go into 796 * an infinite loop calling the media bay interrupt handler. 797 * Therefore we do it all by polling the media bay once each tick. 798 */ 799 800 static struct of_match media_bay_match[] = 801 { 802 { 803 .name = "media-bay", 804 .type = OF_ANY_MATCH, 805 .compatible = "keylargo-media-bay", 806 .data = &keylargo_mb_ops, 807 }, 808 { 809 .name = "media-bay", 810 .type = OF_ANY_MATCH, 811 .compatible = "heathrow-media-bay", 812 .data = &heathrow_mb_ops, 813 }, 814 { 815 .name = "media-bay", 816 .type = OF_ANY_MATCH, 817 .compatible = "ohare-media-bay", 818 .data = &ohare_mb_ops, 819 }, 820 {}, 821 }; 822 823 static struct macio_driver media_bay_driver = 824 { 825 .name = "media-bay", 826 .match_table = media_bay_match, 827 .probe = media_bay_attach, 828 .suspend = media_bay_suspend, 829 .resume = media_bay_resume 830 }; 831 832 static int __init media_bay_init(void) 833 { 834 int i; 835 836 for (i=0; i<MAX_BAYS; i++) { 837 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); 838 media_bays[i].content_id = -1; 839 #ifdef CONFIG_BLK_DEV_IDE 840 media_bays[i].cd_index = -1; 841 #endif 842 } 843 if (_machine != _MACH_Pmac) 844 return -ENODEV; 845 846 macio_register_driver(&media_bay_driver); 847 848 return 0; 849 } 850 851 device_initcall(media_bay_init); 852