Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Pavel Machek | f451390 | 2005-04-16 15:25:32 -0700 | [diff] [blame] | 707 | static int __pmac media_bay_suspend(struct macio_dev *mdev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |