]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/mmc/host/sdhci.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
MAINTAINERS: add myself as atmel-mci maintainer (sd/mmc interface)
[mirror_ubuntu-artful-kernel.git] / drivers / mmc / host / sdhci.c
CommitLineData
d129bceb 1/*
70f10482 2 * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver
d129bceb 3 *
b69c9058 4 * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
d129bceb
PO		 5 *
6 * This program is free software; you can redistribute it and/or modify
643f720c
PO		 7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
84c46a53
PO		 10 *
11 * Thanks to the following companies for their support:
12 *
13 * - JMicron (hardware and technical support)
d129bceb
PO		 14 */
15
d129bceb
PO		 16#include <linux/delay.h>
17#include <linux/highmem.h>
b8c86fc5 18#include <linux/io.h>
d129bceb 19#include <linux/dma-mapping.h>
11763609 20#include <linux/scatterlist.h>
d129bceb 21
2f730fec
PO		 22#include <linux/leds.h>
23
d129bceb 24#include <linux/mmc/host.h>
d129bceb 25
d129bceb
PO		 26#include "sdhci.h"
27
28#define DRIVER_NAME "sdhci"
d129bceb 29
d129bceb 30#define DBG(f, x...) \
c6563178 31 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
d129bceb 32
f9134319
PO		 33#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
34 defined(CONFIG_MMC_SDHCI_MODULE))
35#define SDHCI_USE_LEDS_CLASS
36#endif
37
df673b22 38static unsigned int debug_quirks = 0;
67435274 39
d129bceb
PO		 40static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
41static void sdhci_finish_data(struct sdhci_host *);
42
43static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
44static void sdhci_finish_command(struct sdhci_host *);
45
46static void sdhci_dumpregs(struct sdhci_host *host)
47{
48 printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
49
50 printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
4e4141a5
AV		 51 sdhci_readl(host, SDHCI_DMA_ADDRESS),
52 sdhci_readw(host, SDHCI_HOST_VERSION));
d129bceb 53 printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
4e4141a5
AV		 54 sdhci_readw(host, SDHCI_BLOCK_SIZE),
55 sdhci_readw(host, SDHCI_BLOCK_COUNT));
d129bceb 56 printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
4e4141a5
AV		 57 sdhci_readl(host, SDHCI_ARGUMENT),
58 sdhci_readw(host, SDHCI_TRANSFER_MODE));
d129bceb 59 printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
4e4141a5
AV		 60 sdhci_readl(host, SDHCI_PRESENT_STATE),
61 sdhci_readb(host, SDHCI_HOST_CONTROL));
d129bceb 62 printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
4e4141a5
AV		 63 sdhci_readb(host, SDHCI_POWER_CONTROL),
64 sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL));
d129bceb 65 printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
4e4141a5
AV		 66 sdhci_readb(host, SDHCI_WAKE_UP_CONTROL),
67 sdhci_readw(host, SDHCI_CLOCK_CONTROL));
d129bceb 68 printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
4e4141a5
AV		 69 sdhci_readb(host, SDHCI_TIMEOUT_CONTROL),
70 sdhci_readl(host, SDHCI_INT_STATUS));
d129bceb 71 printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
4e4141a5
AV		 72 sdhci_readl(host, SDHCI_INT_ENABLE),
73 sdhci_readl(host, SDHCI_SIGNAL_ENABLE));
d129bceb 74 printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
4e4141a5
AV		 75 sdhci_readw(host, SDHCI_ACMD12_ERR),
76 sdhci_readw(host, SDHCI_SLOT_INT_STATUS));
d129bceb 77 printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
4e4141a5
AV		 78 sdhci_readl(host, SDHCI_CAPABILITIES),
79 sdhci_readl(host, SDHCI_MAX_CURRENT));
d129bceb 80
be3f4ae0
BD		 81 if (host->flags & SDHCI_USE_ADMA)
82 printk(KERN_DEBUG DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
83 readl(host->ioaddr + SDHCI_ADMA_ERROR),
84 readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
85
d129bceb
PO		 86 printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
87}
88
89/*****************************************************************************\
90 * *
91 * Low level functions *
92 * *
93\*****************************************************************************/
94
7260cf5e
AV		 95static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
96{
97 u32 ier;
98
99 ier = sdhci_readl(host, SDHCI_INT_ENABLE);
100 ier &= ~clear;
101 ier |= set;
102 sdhci_writel(host, ier, SDHCI_INT_ENABLE);
103 sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
104}
105
106static void sdhci_unmask_irqs(struct sdhci_host *host, u32 irqs)
107{
108 sdhci_clear_set_irqs(host, 0, irqs);
109}
110
111static void sdhci_mask_irqs(struct sdhci_host *host, u32 irqs)
112{
113 sdhci_clear_set_irqs(host, irqs, 0);
114}
115
116static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
117{
118 u32 irqs = SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT;
119
68d1fb7e
AV		 120 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
121 return;
122
7260cf5e
AV		 123 if (enable)
124 sdhci_unmask_irqs(host, irqs);
125 else
126 sdhci_mask_irqs(host, irqs);
127}
128
129static void sdhci_enable_card_detection(struct sdhci_host *host)
130{
131 sdhci_set_card_detection(host, true);
132}
133
134static void sdhci_disable_card_detection(struct sdhci_host *host)
135{
136 sdhci_set_card_detection(host, false);
137}
138
d129bceb
PO		 139static void sdhci_reset(struct sdhci_host *host, u8 mask)
140{
e16514d8 141 unsigned long timeout;
063a9dbb 142 u32 uninitialized_var(ier);
e16514d8 143
b8c86fc5 144 if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
4e4141a5 145 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) &
8a4da143
PO		 146 SDHCI_CARD_PRESENT))
147 return;
148 }
149
063a9dbb
AV		 150 if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
151 ier = sdhci_readl(host, SDHCI_INT_ENABLE);
152
4e4141a5 153 sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
d129bceb 154
e16514d8 155 if (mask & SDHCI_RESET_ALL)
d129bceb
PO		 156 host->clock = 0;
157
e16514d8
PO		 158 /* Wait max 100 ms */
159 timeout = 100;
160
161 /* hw clears the bit when it's done */
4e4141a5 162 while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
e16514d8 163 if (timeout == 0) {
acf1da45 164 printk(KERN_ERR "%s: Reset 0x%x never completed.\n",
e16514d8
PO		 165 mmc_hostname(host->mmc), (int)mask);
166 sdhci_dumpregs(host);
167 return;
168 }
169 timeout--;
170 mdelay(1);
d129bceb 171 }
063a9dbb
AV		 172
173 if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
174 sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
d129bceb
PO		 175}
176
177static void sdhci_init(struct sdhci_host *host)
178{
d129bceb
PO		 179 sdhci_reset(host, SDHCI_RESET_ALL);
180
7260cf5e
AV		 181 sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK,
182 SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
3192a28f
PO		 183 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
184 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
6aa943ab 185 SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE);
7260cf5e 186}
d129bceb 187
7260cf5e
AV		 188static void sdhci_reinit(struct sdhci_host *host)
189{
190 sdhci_init(host);
191 sdhci_enable_card_detection(host);
d129bceb
PO		 192}
193
194static void sdhci_activate_led(struct sdhci_host *host)
195{
196 u8 ctrl;
197
4e4141a5 198 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 199 ctrl |= SDHCI_CTRL_LED;
4e4141a5 200 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 201}
202
203static void sdhci_deactivate_led(struct sdhci_host *host)
204{
205 u8 ctrl;
206
4e4141a5 207 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 208 ctrl &= ~SDHCI_CTRL_LED;
4e4141a5 209 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 210}
211
f9134319 212#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 213static void sdhci_led_control(struct led_classdev *led,
214 enum led_brightness brightness)
215{
216 struct sdhci_host *host = container_of(led, struct sdhci_host, led);
217 unsigned long flags;
218
219 spin_lock_irqsave(&host->lock, flags);
220
221 if (brightness == LED_OFF)
222 sdhci_deactivate_led(host);
223 else
224 sdhci_activate_led(host);
225
226 spin_unlock_irqrestore(&host->lock, flags);
227}
228#endif
229
d129bceb
PO		 230/*****************************************************************************\
231 * *
232 * Core functions *
233 * *
234\*****************************************************************************/
235
a406f5a3 236static void sdhci_read_block_pio(struct sdhci_host *host)
d129bceb 237{
7659150c
PO		 238 unsigned long flags;
239 size_t blksize, len, chunk;
7244b85b 240 u32 uninitialized_var(scratch);
7659150c 241 u8 *buf;
d129bceb 242
a406f5a3 243 DBG("PIO reading\n");
d129bceb 244
a406f5a3 245 blksize = host->data->blksz;
7659150c 246 chunk = 0;
d129bceb 247
7659150c 248 local_irq_save(flags);
d129bceb 249
a406f5a3 250 while (blksize) {
7659150c
PO		 251 if (!sg_miter_next(&host->sg_miter))
252 BUG();
d129bceb 253
7659150c 254 len = min(host->sg_miter.length, blksize);
d129bceb 255
7659150c
PO		 256 blksize -= len;
257 host->sg_miter.consumed = len;
14d836e7 258
7659150c 259 buf = host->sg_miter.addr;
d129bceb 260
7659150c
PO		 261 while (len) {
262 if (chunk == 0) {
4e4141a5 263 scratch = sdhci_readl(host, SDHCI_BUFFER);
7659150c 264 chunk = 4;
a406f5a3 265 }
7659150c
PO		 266
267 *buf = scratch & 0xFF;
268
269 buf++;
270 scratch >>= 8;
271 chunk--;
272 len--;
d129bceb 273 }
a406f5a3 274 }
7659150c
PO		 275
276 sg_miter_stop(&host->sg_miter);
277
278 local_irq_restore(flags);
a406f5a3 279}
d129bceb 280
a406f5a3
PO		 281static void sdhci_write_block_pio(struct sdhci_host *host)
282{
7659150c
PO		 283 unsigned long flags;
284 size_t blksize, len, chunk;
285 u32 scratch;
286 u8 *buf;
d129bceb 287
a406f5a3
PO		 288 DBG("PIO writing\n");
289
290 blksize = host->data->blksz;
7659150c
PO		 291 chunk = 0;
292 scratch = 0;
d129bceb 293
7659150c 294 local_irq_save(flags);
d129bceb 295
a406f5a3 296 while (blksize) {
7659150c
PO		 297 if (!sg_miter_next(&host->sg_miter))
298 BUG();
a406f5a3 299
7659150c
PO		 300 len = min(host->sg_miter.length, blksize);
301
302 blksize -= len;
303 host->sg_miter.consumed = len;
304
305 buf = host->sg_miter.addr;
d129bceb 306
7659150c
PO		 307 while (len) {
308 scratch |= (u32)*buf << (chunk * 8);
309
310 buf++;
311 chunk++;
312 len--;
313
314 if ((chunk == 4) || ((len == 0) && (blksize == 0))) {
4e4141a5 315 sdhci_writel(host, scratch, SDHCI_BUFFER);
7659150c
PO		 316 chunk = 0;
317 scratch = 0;
d129bceb 318 }
d129bceb
PO		 319 }
320 }
7659150c
PO		 321
322 sg_miter_stop(&host->sg_miter);
323
324 local_irq_restore(flags);
a406f5a3
PO		 325}
326
327static void sdhci_transfer_pio(struct sdhci_host *host)
328{
329 u32 mask;
330
331 BUG_ON(!host->data);
332
7659150c 333 if (host->blocks == 0)
a406f5a3
PO		 334 return;
335
336 if (host->data->flags & MMC_DATA_READ)
337 mask = SDHCI_DATA_AVAILABLE;
338 else
339 mask = SDHCI_SPACE_AVAILABLE;
340
4a3cba32
PO		 341 /*
342 * Some controllers (JMicron JMB38x) mess up the buffer bits
343 * for transfers < 4 bytes. As long as it is just one block,
344 * we can ignore the bits.
345 */
346 if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) &&
347 (host->data->blocks == 1))
348 mask = ~0;
349
4e4141a5 350 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
3e3bf207
AV		 351 if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY)
352 udelay(100);
353
a406f5a3
PO		 354 if (host->data->flags & MMC_DATA_READ)
355 sdhci_read_block_pio(host);
356 else
357 sdhci_write_block_pio(host);
d129bceb 358
7659150c
PO		 359 host->blocks--;
360 if (host->blocks == 0)
a406f5a3 361 break;
a406f5a3 362 }
d129bceb 363
a406f5a3 364 DBG("PIO transfer complete.\n");
d129bceb
PO		 365}
366
2134a922
PO		 367static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
368{
369 local_irq_save(*flags);
370 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
371}
372
373static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
374{
375 kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
376 local_irq_restore(*flags);
377}
378
8f1934ce 379static int sdhci_adma_table_pre(struct sdhci_host *host,
2134a922
PO		 380 struct mmc_data *data)
381{
382 int direction;
383
384 u8 *desc;
385 u8 *align;
386 dma_addr_t addr;
387 dma_addr_t align_addr;
388 int len, offset;
389
390 struct scatterlist *sg;
391 int i;
392 char *buffer;
393 unsigned long flags;
394
395 /*
396 * The spec does not specify endianness of descriptor table.
397 * We currently guess that it is LE.
398 */
399
400 if (data->flags & MMC_DATA_READ)
401 direction = DMA_FROM_DEVICE;
402 else
403 direction = DMA_TO_DEVICE;
404
405 /*
406 * The ADMA descriptor table is mapped further down as we
407 * need to fill it with data first.
408 */
409
410 host->align_addr = dma_map_single(mmc_dev(host->mmc),
411 host->align_buffer, 128 * 4, direction);
8d8bb39b 412 if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr))
8f1934ce 413 goto fail;
2134a922
PO		 414 BUG_ON(host->align_addr & 0x3);
415
416 host->sg_count = dma_map_sg(mmc_dev(host->mmc),
417 data->sg, data->sg_len, direction);
8f1934ce
PO		 418 if (host->sg_count == 0)
419 goto unmap_align;
2134a922
PO		 420
421 desc = host->adma_desc;
422 align = host->align_buffer;
423
424 align_addr = host->align_addr;
425
426 for_each_sg(data->sg, sg, host->sg_count, i) {
427 addr = sg_dma_address(sg);
428 len = sg_dma_len(sg);
429
430 /*
431 * The SDHCI specification states that ADMA
432 * addresses must be 32-bit aligned. If they
433 * aren't, then we use a bounce buffer for
434 * the (up to three) bytes that screw up the
435 * alignment.
436 */
437 offset = (4 - (addr & 0x3)) & 0x3;
438 if (offset) {
439 if (data->flags & MMC_DATA_WRITE) {
440 buffer = sdhci_kmap_atomic(sg, &flags);
6cefd05f 441 WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3));
2134a922
PO		 442 memcpy(align, buffer, offset);
443 sdhci_kunmap_atomic(buffer, &flags);
444 }
445
446 desc[7] = (align_addr >> 24) & 0xff;
447 desc[6] = (align_addr >> 16) & 0xff;
448 desc[5] = (align_addr >> 8) & 0xff;
449 desc[4] = (align_addr >> 0) & 0xff;
450
451 BUG_ON(offset > 65536);
452
453 desc[3] = (offset >> 8) & 0xff;
454 desc[2] = (offset >> 0) & 0xff;
455
456 desc[1] = 0x00;
457 desc[0] = 0x21; /* tran, valid */
458
459 align += 4;
460 align_addr += 4;
461
462 desc += 8;
463
464 addr += offset;
465 len -= offset;
466 }
467
468 desc[7] = (addr >> 24) & 0xff;
469 desc[6] = (addr >> 16) & 0xff;
470 desc[5] = (addr >> 8) & 0xff;
471 desc[4] = (addr >> 0) & 0xff;
472
473 BUG_ON(len > 65536);
474
475 desc[3] = (len >> 8) & 0xff;
476 desc[2] = (len >> 0) & 0xff;
477
478 desc[1] = 0x00;
479 desc[0] = 0x21; /* tran, valid */
480
481 desc += 8;
482
483 /*
484 * If this triggers then we have a calculation bug
485 * somewhere. :/
486 */
487 WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4);
488 }
489
490 /*
491 * Add a terminating entry.
492 */
493 desc[7] = 0;
494 desc[6] = 0;
495 desc[5] = 0;
496 desc[4] = 0;
497
498 desc[3] = 0;
499 desc[2] = 0;
500
501 desc[1] = 0x00;
502 desc[0] = 0x03; /* nop, end, valid */
503
504 /*
505 * Resync align buffer as we might have changed it.
506 */
507 if (data->flags & MMC_DATA_WRITE) {
508 dma_sync_single_for_device(mmc_dev(host->mmc),
509 host->align_addr, 128 * 4, direction);
510 }
511
512 host->adma_addr = dma_map_single(mmc_dev(host->mmc),
513 host->adma_desc, (128 * 2 + 1) * 4, DMA_TO_DEVICE);
980167b7 514 if (dma_mapping_error(mmc_dev(host->mmc), host->adma_addr))
8f1934ce 515 goto unmap_entries;
2134a922 516 BUG_ON(host->adma_addr & 0x3);
8f1934ce
PO		 517
518 return 0;
519
520unmap_entries:
521 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
522 data->sg_len, direction);
523unmap_align:
524 dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
525 128 * 4, direction);
526fail:
527 return -EINVAL;
2134a922
PO		 528}
529
530static void sdhci_adma_table_post(struct sdhci_host *host,
531 struct mmc_data *data)
532{
533 int direction;
534
535 struct scatterlist *sg;
536 int i, size;
537 u8 *align;
538 char *buffer;
539 unsigned long flags;
540
541 if (data->flags & MMC_DATA_READ)
542 direction = DMA_FROM_DEVICE;
543 else
544 direction = DMA_TO_DEVICE;
545
546 dma_unmap_single(mmc_dev(host->mmc), host->adma_addr,
547 (128 * 2 + 1) * 4, DMA_TO_DEVICE);
548
549 dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
550 128 * 4, direction);
551
552 if (data->flags & MMC_DATA_READ) {
553 dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg,
554 data->sg_len, direction);
555
556 align = host->align_buffer;
557
558 for_each_sg(data->sg, sg, host->sg_count, i) {
559 if (sg_dma_address(sg) & 0x3) {
560 size = 4 - (sg_dma_address(sg) & 0x3);
561
562 buffer = sdhci_kmap_atomic(sg, &flags);
6cefd05f 563 WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3));
2134a922
PO		 564 memcpy(buffer, align, size);
565 sdhci_kunmap_atomic(buffer, &flags);
566
567 align += 4;
568 }
569 }
570 }
571
572 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
573 data->sg_len, direction);
574}
575
ee53ab5d 576static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
d129bceb 577{
1c8cde92
PO		 578 u8 count;
579 unsigned target_timeout, current_timeout;
d129bceb 580
ee53ab5d
PO		 581 /*
582 * If the host controller provides us with an incorrect timeout
583 * value, just skip the check and use 0xE. The hardware may take
584 * longer to time out, but that's much better than having a too-short
585 * timeout value.
586 */
587 if ((host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL))
588 return 0xE;
e538fbe8 589
1c8cde92
PO		 590 /* timeout in us */
591 target_timeout = data->timeout_ns / 1000 +
592 data->timeout_clks / host->clock;
d129bceb 593
1c8cde92
PO		 594 /*
595 * Figure out needed cycles.
596 * We do this in steps in order to fit inside a 32 bit int.
597 * The first step is the minimum timeout, which will have a
598 * minimum resolution of 6 bits:
599 * (1) 2^13*1000 > 2^22,
600 * (2) host->timeout_clk < 2^16
601 * =>
602 * (1) / (2) > 2^6
603 */
604 count = 0;
605 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
606 while (current_timeout < target_timeout) {
607 count++;
608 current_timeout <<= 1;
609 if (count >= 0xF)
610 break;
611 }
612
613 if (count >= 0xF) {
614 printk(KERN_WARNING "%s: Too large timeout requested!\n",
615 mmc_hostname(host->mmc));
616 count = 0xE;
617 }
618
ee53ab5d
PO		 619 return count;
620}
621
6aa943ab
AV		 622static void sdhci_set_transfer_irqs(struct sdhci_host *host)
623{
624 u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL;
625 u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR;
626
627 if (host->flags & SDHCI_REQ_USE_DMA)
628 sdhci_clear_set_irqs(host, pio_irqs, dma_irqs);
629 else
630 sdhci_clear_set_irqs(host, dma_irqs, pio_irqs);
631}
632
ee53ab5d
PO		 633static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
634{
635 u8 count;
2134a922 636 u8 ctrl;
8f1934ce 637 int ret;
ee53ab5d
PO		 638
639 WARN_ON(host->data);
640
641 if (data == NULL)
642 return;
643
644 /* Sanity checks */
645 BUG_ON(data->blksz * data->blocks > 524288);
646 BUG_ON(data->blksz > host->mmc->max_blk_size);
647 BUG_ON(data->blocks > 65535);
648
649 host->data = data;
650 host->data_early = 0;
651
652 count = sdhci_calc_timeout(host, data);
4e4141a5 653 sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
d129bceb 654
c9fddbc4
PO		 655 if (host->flags & SDHCI_USE_DMA)
656 host->flags |= SDHCI_REQ_USE_DMA;
657
2134a922
PO		 658 /*
659 * FIXME: This doesn't account for merging when mapping the
660 * scatterlist.
661 */
662 if (host->flags & SDHCI_REQ_USE_DMA) {
663 int broken, i;
664 struct scatterlist *sg;
665
666 broken = 0;
667 if (host->flags & SDHCI_USE_ADMA) {
668 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
669 broken = 1;
670 } else {
671 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
672 broken = 1;
673 }
674
675 if (unlikely(broken)) {
676 for_each_sg(data->sg, sg, data->sg_len, i) {
677 if (sg->length & 0x3) {
678 DBG("Reverting to PIO because of "
679 "transfer size (%d)\n",
680 sg->length);
681 host->flags &= ~SDHCI_REQ_USE_DMA;
682 break;
683 }
684 }
685 }
c9fddbc4
PO		 686 }
687
688 /*
689 * The assumption here being that alignment is the same after
690 * translation to device address space.
691 */
2134a922
PO		 692 if (host->flags & SDHCI_REQ_USE_DMA) {
693 int broken, i;
694 struct scatterlist *sg;
695
696 broken = 0;
697 if (host->flags & SDHCI_USE_ADMA) {
698 /*
699 * As we use 3 byte chunks to work around
700 * alignment problems, we need to check this
701 * quirk.
702 */
703 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
704 broken = 1;
705 } else {
706 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
707 broken = 1;
708 }
709
710 if (unlikely(broken)) {
711 for_each_sg(data->sg, sg, data->sg_len, i) {
712 if (sg->offset & 0x3) {
713 DBG("Reverting to PIO because of "
714 "bad alignment\n");
715 host->flags &= ~SDHCI_REQ_USE_DMA;
716 break;
717 }
718 }
719 }
720 }
721
8f1934ce
PO		 722 if (host->flags & SDHCI_REQ_USE_DMA) {
723 if (host->flags & SDHCI_USE_ADMA) {
724 ret = sdhci_adma_table_pre(host, data);
725 if (ret) {
726 /*
727 * This only happens when someone fed
728 * us an invalid request.
729 */
730 WARN_ON(1);
ebd6d357 731 host->flags &= ~SDHCI_REQ_USE_DMA;
8f1934ce 732 } else {
4e4141a5
AV		 733 sdhci_writel(host, host->adma_addr,
734 SDHCI_ADMA_ADDRESS);
8f1934ce
PO		 735 }
736 } else {
c8b3e02e 737 int sg_cnt;
8f1934ce 738
c8b3e02e 739 sg_cnt = dma_map_sg(mmc_dev(host->mmc),
8f1934ce
PO		 740 data->sg, data->sg_len,
741 (data->flags & MMC_DATA_READ) ?
742 DMA_FROM_DEVICE :
743 DMA_TO_DEVICE);
c8b3e02e 744 if (sg_cnt == 0) {
8f1934ce
PO		 745 /*
746 * This only happens when someone fed
747 * us an invalid request.
748 */
749 WARN_ON(1);
ebd6d357 750 host->flags &= ~SDHCI_REQ_USE_DMA;
8f1934ce 751 } else {
719a61b4 752 WARN_ON(sg_cnt != 1);
4e4141a5
AV		 753 sdhci_writel(host, sg_dma_address(data->sg),
754 SDHCI_DMA_ADDRESS);
8f1934ce
PO		 755 }
756 }
757 }
758
2134a922
PO		 759 /*
760 * Always adjust the DMA selection as some controllers
761 * (e.g. JMicron) can't do PIO properly when the selection
762 * is ADMA.
763 */
764 if (host->version >= SDHCI_SPEC_200) {
4e4141a5 765 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
2134a922
PO		 766 ctrl &= ~SDHCI_CTRL_DMA_MASK;
767 if ((host->flags & SDHCI_REQ_USE_DMA) &&
768 (host->flags & SDHCI_USE_ADMA))
769 ctrl |= SDHCI_CTRL_ADMA32;
770 else
771 ctrl |= SDHCI_CTRL_SDMA;
4e4141a5 772 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
c9fddbc4
PO		 773 }
774
8f1934ce 775 if (!(host->flags & SDHCI_REQ_USE_DMA)) {
7659150c
PO		 776 sg_miter_start(&host->sg_miter,
777 data->sg, data->sg_len, SG_MITER_ATOMIC);
778 host->blocks = data->blocks;
d129bceb 779 }
c7fa9963 780
6aa943ab
AV		 781 sdhci_set_transfer_irqs(host);
782
bab76961 783 /* We do not handle DMA boundaries, so set it to max (512 KiB) */
4e4141a5
AV		 784 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, data->blksz), SDHCI_BLOCK_SIZE);
785 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
c7fa9963
PO		 786}
787
788static void sdhci_set_transfer_mode(struct sdhci_host *host,
789 struct mmc_data *data)
790{
791 u16 mode;
792
c7fa9963
PO		 793 if (data == NULL)
794 return;
795
e538fbe8
PO		 796 WARN_ON(!host->data);
797
c7fa9963
PO		 798 mode = SDHCI_TRNS_BLK_CNT_EN;
799 if (data->blocks > 1)
800 mode |= SDHCI_TRNS_MULTI;
801 if (data->flags & MMC_DATA_READ)
802 mode |= SDHCI_TRNS_READ;
c9fddbc4 803 if (host->flags & SDHCI_REQ_USE_DMA)
c7fa9963
PO		 804 mode |= SDHCI_TRNS_DMA;
805
4e4141a5 806 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
d129bceb
PO		 807}
808
809static void sdhci_finish_data(struct sdhci_host *host)
810{
811 struct mmc_data *data;
d129bceb
PO		 812
813 BUG_ON(!host->data);
814
815 data = host->data;
816 host->data = NULL;
817
c9fddbc4 818 if (host->flags & SDHCI_REQ_USE_DMA) {
2134a922
PO		 819 if (host->flags & SDHCI_USE_ADMA)
820 sdhci_adma_table_post(host, data);
821 else {
822 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
823 data->sg_len, (data->flags & MMC_DATA_READ) ?
824 DMA_FROM_DEVICE : DMA_TO_DEVICE);
825 }
d129bceb
PO		 826 }
827
828 /*
c9b74c5b
PO		 829 * The specification states that the block count register must
830 * be updated, but it does not specify at what point in the
831 * data flow. That makes the register entirely useless to read
832 * back so we have to assume that nothing made it to the card
833 * in the event of an error.
d129bceb 834 */
c9b74c5b
PO		 835 if (data->error)
836 data->bytes_xfered = 0;
d129bceb 837 else
c9b74c5b 838 data->bytes_xfered = data->blksz * data->blocks;
d129bceb 839
d129bceb
PO		 840 if (data->stop) {
841 /*
842 * The controller needs a reset of internal state machines
843 * upon error conditions.
844 */
17b0429d 845 if (data->error) {
d129bceb
PO		 846 sdhci_reset(host, SDHCI_RESET_CMD);
847 sdhci_reset(host, SDHCI_RESET_DATA);
848 }
849
850 sdhci_send_command(host, data->stop);
851 } else
852 tasklet_schedule(&host->finish_tasklet);
853}
854
855static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
856{
857 int flags;
fd2208d7 858 u32 mask;
7cb2c76f 859 unsigned long timeout;
d129bceb
PO		 860
861 WARN_ON(host->cmd);
862
d129bceb 863 /* Wait max 10 ms */
7cb2c76f 864 timeout = 10;
fd2208d7
PO		 865
866 mask = SDHCI_CMD_INHIBIT;
867 if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
868 mask |= SDHCI_DATA_INHIBIT;
869
870 /* We shouldn't wait for data inihibit for stop commands, even
871 though they might use busy signaling */
872 if (host->mrq->data && (cmd == host->mrq->data->stop))
873 mask &= ~SDHCI_DATA_INHIBIT;
874
4e4141a5 875 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
7cb2c76f 876 if (timeout == 0) {
d129bceb 877 printk(KERN_ERR "%s: Controller never released "
acf1da45 878 "inhibit bit(s).\n", mmc_hostname(host->mmc));
d129bceb 879 sdhci_dumpregs(host);
17b0429d 880 cmd->error = -EIO;
d129bceb
PO		 881 tasklet_schedule(&host->finish_tasklet);
882 return;
883 }
7cb2c76f
PO		 884 timeout--;
885 mdelay(1);
886 }
d129bceb
PO		 887
888 mod_timer(&host->timer, jiffies + 10 * HZ);
889
890 host->cmd = cmd;
891
892 sdhci_prepare_data(host, cmd->data);
893
4e4141a5 894 sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT);
d129bceb 895
c7fa9963
PO		 896 sdhci_set_transfer_mode(host, cmd->data);
897
d129bceb 898 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
acf1da45 899 printk(KERN_ERR "%s: Unsupported response type!\n",
d129bceb 900 mmc_hostname(host->mmc));
17b0429d 901 cmd->error = -EINVAL;
d129bceb
PO		 902 tasklet_schedule(&host->finish_tasklet);
903 return;
904 }
905
906 if (!(cmd->flags & MMC_RSP_PRESENT))
907 flags = SDHCI_CMD_RESP_NONE;
908 else if (cmd->flags & MMC_RSP_136)
909 flags = SDHCI_CMD_RESP_LONG;
910 else if (cmd->flags & MMC_RSP_BUSY)
911 flags = SDHCI_CMD_RESP_SHORT_BUSY;
912 else
913 flags = SDHCI_CMD_RESP_SHORT;
914
915 if (cmd->flags & MMC_RSP_CRC)
916 flags |= SDHCI_CMD_CRC;
917 if (cmd->flags & MMC_RSP_OPCODE)
918 flags |= SDHCI_CMD_INDEX;
919 if (cmd->data)
920 flags |= SDHCI_CMD_DATA;
921
4e4141a5 922 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
d129bceb
PO		 923}
924
925static void sdhci_finish_command(struct sdhci_host *host)
926{
927 int i;
928
929 BUG_ON(host->cmd == NULL);
930
931 if (host->cmd->flags & MMC_RSP_PRESENT) {
932 if (host->cmd->flags & MMC_RSP_136) {
933 /* CRC is stripped so we need to do some shifting. */
934 for (i = 0;i < 4;i++) {
4e4141a5 935 host->cmd->resp[i] = sdhci_readl(host,
d129bceb
PO		 936 SDHCI_RESPONSE + (3-i)*4) << 8;
937 if (i != 3)
938 host->cmd->resp[i] |=
4e4141a5 939 sdhci_readb(host,
d129bceb
PO		 940 SDHCI_RESPONSE + (3-i)*4-1);
941 }
942 } else {
4e4141a5 943 host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE);
d129bceb
PO		 944 }
945 }
946
17b0429d 947 host->cmd->error = 0;
d129bceb 948
e538fbe8
PO		 949 if (host->data && host->data_early)
950 sdhci_finish_data(host);
951
952 if (!host->cmd->data)
d129bceb
PO		 953 tasklet_schedule(&host->finish_tasklet);
954
955 host->cmd = NULL;
956}
957
958static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
959{
960 int div;
961 u16 clk;
7cb2c76f 962 unsigned long timeout;
d129bceb
PO		 963
964 if (clock == host->clock)
965 return;
966
8114634c
AV		 967 if (host->ops->set_clock) {
968 host->ops->set_clock(host, clock);
969 if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK)
970 return;
971 }
972
4e4141a5 973 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
d129bceb
PO		 974
975 if (clock == 0)
976 goto out;
977
978 for (div = 1;div < 256;div *= 2) {
979 if ((host->max_clk / div) <= clock)
980 break;
981 }
982 div >>= 1;
983
984 clk = div << SDHCI_DIVIDER_SHIFT;
985 clk |= SDHCI_CLOCK_INT_EN;
4e4141a5 986 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb
PO		 987
988 /* Wait max 10 ms */
7cb2c76f 989 timeout = 10;
4e4141a5 990 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
7cb2c76f
PO		 991 & SDHCI_CLOCK_INT_STABLE)) {
992 if (timeout == 0) {
acf1da45
PO		 993 printk(KERN_ERR "%s: Internal clock never "
994 "stabilised.\n", mmc_hostname(host->mmc));
d129bceb
PO		 995 sdhci_dumpregs(host);
996 return;
997 }
7cb2c76f
PO		 998 timeout--;
999 mdelay(1);
1000 }
d129bceb
PO		 1001
1002 clk |= SDHCI_CLOCK_CARD_EN;
4e4141a5 1003 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb
PO		 1004
1005out:
1006 host->clock = clock;
1007}
1008
146ad66e
PO		 1009static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
1010{
1011 u8 pwr;
1012
ae628903
PO		 1013 if (power == (unsigned short)-1)
1014 pwr = 0;
1015 else {
1016 switch (1 << power) {
1017 case MMC_VDD_165_195:
1018 pwr = SDHCI_POWER_180;
1019 break;
1020 case MMC_VDD_29_30:
1021 case MMC_VDD_30_31:
1022 pwr = SDHCI_POWER_300;
1023 break;
1024 case MMC_VDD_32_33:
1025 case MMC_VDD_33_34:
1026 pwr = SDHCI_POWER_330;
1027 break;
1028 default:
1029 BUG();
1030 }
1031 }
1032
1033 if (host->pwr == pwr)
146ad66e
PO		 1034 return;
1035
ae628903
PO		 1036 host->pwr = pwr;
1037
1038 if (pwr == 0) {
4e4141a5 1039 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
ae628903 1040 return;
9e9dc5f2
DS		 1041 }
1042
1043 /*
1044 * Spec says that we should clear the power reg before setting
1045 * a new value. Some controllers don't seem to like this though.
1046 */
b8c86fc5 1047 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
4e4141a5 1048 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
146ad66e 1049
e08c1694 1050 /*
c71f6512 1051 * At least the Marvell CaFe chip gets confused if we set the voltage
e08c1694
AS		 1052 * and set turn on power at the same time, so set the voltage first.
1053 */
b8c86fc5 1054 if ((host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER))
ae628903 1055 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
e08c1694 1056
ae628903 1057 pwr |= SDHCI_POWER_ON;
146ad66e 1058
ae628903 1059 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
146ad66e
PO		 1060}
1061
d129bceb
PO		 1062/*****************************************************************************\
1063 * *
1064 * MMC callbacks *
1065 * *
1066\*****************************************************************************/
1067
1068static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
1069{
1070 struct sdhci_host *host;
68d1fb7e 1071 bool present;
d129bceb
PO		 1072 unsigned long flags;
1073
1074 host = mmc_priv(mmc);
1075
1076 spin_lock_irqsave(&host->lock, flags);
1077
1078 WARN_ON(host->mrq != NULL);
1079
f9134319 1080#ifndef SDHCI_USE_LEDS_CLASS
d129bceb 1081 sdhci_activate_led(host);
2f730fec 1082#endif
d129bceb
PO		 1083
1084 host->mrq = mrq;
1085
68d1fb7e
AV		 1086 /* If polling, assume that the card is always present. */
1087 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
1088 present = true;
1089 else
1090 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
1091 SDHCI_CARD_PRESENT;
1092
1093 if (!present || host->flags & SDHCI_DEVICE_DEAD) {
17b0429d 1094 host->mrq->cmd->error = -ENOMEDIUM;
d129bceb
PO		 1095 tasklet_schedule(&host->finish_tasklet);
1096 } else
1097 sdhci_send_command(host, mrq->cmd);
1098
5f25a66f 1099 mmiowb();
d129bceb
PO		 1100 spin_unlock_irqrestore(&host->lock, flags);
1101}
1102
1103static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1104{
1105 struct sdhci_host *host;
1106 unsigned long flags;
1107 u8 ctrl;
1108
1109 host = mmc_priv(mmc);
1110
1111 spin_lock_irqsave(&host->lock, flags);
1112
1e72859e
PO		 1113 if (host->flags & SDHCI_DEVICE_DEAD)
1114 goto out;
1115
d129bceb
PO		 1116 /*
1117 * Reset the chip on each power off.
1118 * Should clear out any weird states.
1119 */
1120 if (ios->power_mode == MMC_POWER_OFF) {
4e4141a5 1121 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
7260cf5e 1122 sdhci_reinit(host);
d129bceb
PO		 1123 }
1124
1125 sdhci_set_clock(host, ios->clock);
1126
1127 if (ios->power_mode == MMC_POWER_OFF)
146ad66e 1128 sdhci_set_power(host, -1);
d129bceb 1129 else
146ad66e 1130 sdhci_set_power(host, ios->vdd);
d129bceb 1131
4e4141a5 1132 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
cd9277c0 1133
d129bceb
PO		 1134 if (ios->bus_width == MMC_BUS_WIDTH_4)
1135 ctrl |= SDHCI_CTRL_4BITBUS;
1136 else
1137 ctrl &= ~SDHCI_CTRL_4BITBUS;
cd9277c0
PO		 1138
1139 if (ios->timing == MMC_TIMING_SD_HS)
1140 ctrl |= SDHCI_CTRL_HISPD;
1141 else
1142 ctrl &= ~SDHCI_CTRL_HISPD;
1143
4e4141a5 1144 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb 1145
b8352260
LD		 1146 /*
1147 * Some (ENE) controllers go apeshit on some ios operation,
1148 * signalling timeout and CRC errors even on CMD0. Resetting
1149 * it on each ios seems to solve the problem.
1150 */
b8c86fc5 1151 if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
b8352260
LD		 1152 sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
1153
1e72859e 1154out:
5f25a66f 1155 mmiowb();
d129bceb
PO		 1156 spin_unlock_irqrestore(&host->lock, flags);
1157}
1158
1159static int sdhci_get_ro(struct mmc_host *mmc)
1160{
1161 struct sdhci_host *host;
1162 unsigned long flags;
1163 int present;
1164
1165 host = mmc_priv(mmc);
1166
1167 spin_lock_irqsave(&host->lock, flags);
1168
1e72859e
PO		 1169 if (host->flags & SDHCI_DEVICE_DEAD)
1170 present = 0;
1171 else
4e4141a5 1172 present = sdhci_readl(host, SDHCI_PRESENT_STATE);
d129bceb
PO		 1173
1174 spin_unlock_irqrestore(&host->lock, flags);
1175
c5075a10
AV		 1176 if (host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT)
1177 return !!(present & SDHCI_WRITE_PROTECT);
d129bceb
PO		 1178 return !(present & SDHCI_WRITE_PROTECT);
1179}
1180
f75979b7
PO		 1181static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
1182{
1183 struct sdhci_host *host;
1184 unsigned long flags;
f75979b7
PO		 1185
1186 host = mmc_priv(mmc);
1187
1188 spin_lock_irqsave(&host->lock, flags);
1189
1e72859e
PO		 1190 if (host->flags & SDHCI_DEVICE_DEAD)
1191 goto out;
1192
f75979b7 1193 if (enable)
7260cf5e
AV		 1194 sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT);
1195 else
1196 sdhci_mask_irqs(host, SDHCI_INT_CARD_INT);
1e72859e 1197out:
f75979b7
PO		 1198 mmiowb();
1199
1200 spin_unlock_irqrestore(&host->lock, flags);
1201}
1202
ab7aefd0 1203static const struct mmc_host_ops sdhci_ops = {
d129bceb
PO		 1204 .request = sdhci_request,
1205 .set_ios = sdhci_set_ios,
1206 .get_ro = sdhci_get_ro,
f75979b7 1207 .enable_sdio_irq = sdhci_enable_sdio_irq,
d129bceb
PO		 1208};
1209
1210/*****************************************************************************\
1211 * *
1212 * Tasklets *
1213 * *
1214\*****************************************************************************/
1215
1216static void sdhci_tasklet_card(unsigned long param)
1217{
1218 struct sdhci_host *host;
1219 unsigned long flags;
1220
1221 host = (struct sdhci_host*)param;
1222
1223 spin_lock_irqsave(&host->lock, flags);
1224
4e4141a5 1225 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
d129bceb
PO		 1226 if (host->mrq) {
1227 printk(KERN_ERR "%s: Card removed during transfer!\n",
1228 mmc_hostname(host->mmc));
1229 printk(KERN_ERR "%s: Resetting controller.\n",
1230 mmc_hostname(host->mmc));
1231
1232 sdhci_reset(host, SDHCI_RESET_CMD);
1233 sdhci_reset(host, SDHCI_RESET_DATA);
1234
17b0429d 1235 host->mrq->cmd->error = -ENOMEDIUM;
d129bceb
PO		 1236 tasklet_schedule(&host->finish_tasklet);
1237 }
1238 }
1239
1240 spin_unlock_irqrestore(&host->lock, flags);
1241
04cf585d 1242 mmc_detect_change(host->mmc, msecs_to_jiffies(200));
d129bceb
PO		 1243}
1244
1245static void sdhci_tasklet_finish(unsigned long param)
1246{
1247 struct sdhci_host *host;
1248 unsigned long flags;
1249 struct mmc_request *mrq;
1250
1251 host = (struct sdhci_host*)param;
1252
1253 spin_lock_irqsave(&host->lock, flags);
1254
1255 del_timer(&host->timer);
1256
1257 mrq = host->mrq;
1258
d129bceb
PO		 1259 /*
1260 * The controller needs a reset of internal state machines
1261 * upon error conditions.
1262 */
1e72859e
PO		 1263 if (!(host->flags & SDHCI_DEVICE_DEAD) &&
1264 (mrq->cmd->error ||
1265 (mrq->data && (mrq->data->error ||
1266 (mrq->data->stop && mrq->data->stop->error))) ||
1267 (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
645289dc
PO		 1268
1269 /* Some controllers need this kick or reset won't work here */
b8c86fc5 1270 if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
645289dc
PO		 1271 unsigned int clock;
1272
1273 /* This is to force an update */
1274 clock = host->clock;
1275 host->clock = 0;
1276 sdhci_set_clock(host, clock);
1277 }
1278
1279 /* Spec says we should do both at the same time, but Ricoh
1280 controllers do not like that. */
d129bceb
PO		 1281 sdhci_reset(host, SDHCI_RESET_CMD);
1282 sdhci_reset(host, SDHCI_RESET_DATA);
1283 }
1284
1285 host->mrq = NULL;
1286 host->cmd = NULL;
1287 host->data = NULL;
1288
f9134319 1289#ifndef SDHCI_USE_LEDS_CLASS
d129bceb 1290 sdhci_deactivate_led(host);
2f730fec 1291#endif
d129bceb 1292
5f25a66f 1293 mmiowb();
d129bceb
PO		 1294 spin_unlock_irqrestore(&host->lock, flags);
1295
1296 mmc_request_done(host->mmc, mrq);
1297}
1298
1299static void sdhci_timeout_timer(unsigned long data)
1300{
1301 struct sdhci_host *host;
1302 unsigned long flags;
1303
1304 host = (struct sdhci_host*)data;
1305
1306 spin_lock_irqsave(&host->lock, flags);
1307
1308 if (host->mrq) {
acf1da45
PO		 1309 printk(KERN_ERR "%s: Timeout waiting for hardware "
1310 "interrupt.\n", mmc_hostname(host->mmc));
d129bceb
PO		 1311 sdhci_dumpregs(host);
1312
1313 if (host->data) {
17b0429d 1314 host->data->error = -ETIMEDOUT;
d129bceb
PO		 1315 sdhci_finish_data(host);
1316 } else {
1317 if (host->cmd)
17b0429d 1318 host->cmd->error = -ETIMEDOUT;
d129bceb 1319 else
17b0429d 1320 host->mrq->cmd->error = -ETIMEDOUT;
d129bceb
PO		 1321
1322 tasklet_schedule(&host->finish_tasklet);
1323 }
1324 }
1325
5f25a66f 1326 mmiowb();
d129bceb
PO		 1327 spin_unlock_irqrestore(&host->lock, flags);
1328}
1329
1330/*****************************************************************************\
1331 * *
1332 * Interrupt handling *
1333 * *
1334\*****************************************************************************/
1335
1336static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
1337{
1338 BUG_ON(intmask == 0);
1339
1340 if (!host->cmd) {
b67ac3f3
PO		 1341 printk(KERN_ERR "%s: Got command interrupt 0x%08x even "
1342 "though no command operation was in progress.\n",
1343 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 1344 sdhci_dumpregs(host);
1345 return;
1346 }
1347
43b58b36 1348 if (intmask & SDHCI_INT_TIMEOUT)
17b0429d
PO		 1349 host->cmd->error = -ETIMEDOUT;
1350 else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT |
1351 SDHCI_INT_INDEX))
1352 host->cmd->error = -EILSEQ;
43b58b36 1353
e809517f 1354 if (host->cmd->error) {
d129bceb 1355 tasklet_schedule(&host->finish_tasklet);
e809517f
PO		 1356 return;
1357 }
1358
1359 /*
1360 * The host can send and interrupt when the busy state has
1361 * ended, allowing us to wait without wasting CPU cycles.
1362 * Unfortunately this is overloaded on the "data complete"
1363 * interrupt, so we need to take some care when handling
1364 * it.
1365 *
1366 * Note: The 1.0 specification is a bit ambiguous about this
1367 * feature so there might be some problems with older
1368 * controllers.
1369 */
1370 if (host->cmd->flags & MMC_RSP_BUSY) {
1371 if (host->cmd->data)
1372 DBG("Cannot wait for busy signal when also "
1373 "doing a data transfer");
f945405c 1374 else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ))
e809517f 1375 return;
f945405c
BD		 1376
1377 /* The controller does not support the end-of-busy IRQ,
1378 * fall through and take the SDHCI_INT_RESPONSE */
e809517f
PO		 1379 }
1380
1381 if (intmask & SDHCI_INT_RESPONSE)
43b58b36 1382 sdhci_finish_command(host);
d129bceb
PO		 1383}
1384
6882a8c0
BD		 1385#ifdef DEBUG
1386static void sdhci_show_adma_error(struct sdhci_host *host)
1387{
1388 const char *name = mmc_hostname(host->mmc);
1389 u8 *desc = host->adma_desc;
1390 __le32 *dma;
1391 __le16 *len;
1392 u8 attr;
1393
1394 sdhci_dumpregs(host);
1395
1396 while (true) {
1397 dma = (__le32 *)(desc + 4);
1398 len = (__le16 *)(desc + 2);
1399 attr = *desc;
1400
1401 DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n",
1402 name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr);
1403
1404 desc += 8;
1405
1406 if (attr & 2)
1407 break;
1408 }
1409}
1410#else
1411static void sdhci_show_adma_error(struct sdhci_host *host) { }
1412#endif
1413
d129bceb
PO		 1414static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
1415{
1416 BUG_ON(intmask == 0);
1417
1418 if (!host->data) {
1419 /*
e809517f
PO		 1420 * The "data complete" interrupt is also used to
1421 * indicate that a busy state has ended. See comment
1422 * above in sdhci_cmd_irq().
d129bceb 1423 */
e809517f
PO		 1424 if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) {
1425 if (intmask & SDHCI_INT_DATA_END) {
1426 sdhci_finish_command(host);
1427 return;
1428 }
1429 }
d129bceb 1430
b67ac3f3
PO		 1431 printk(KERN_ERR "%s: Got data interrupt 0x%08x even "
1432 "though no data operation was in progress.\n",
1433 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 1434 sdhci_dumpregs(host);
1435
1436 return;
1437 }
1438
1439 if (intmask & SDHCI_INT_DATA_TIMEOUT)
17b0429d
PO		 1440 host->data->error = -ETIMEDOUT;
1441 else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
1442 host->data->error = -EILSEQ;
6882a8c0
BD		 1443 else if (intmask & SDHCI_INT_ADMA_ERROR) {
1444 printk(KERN_ERR "%s: ADMA error\n", mmc_hostname(host->mmc));
1445 sdhci_show_adma_error(host);
2134a922 1446 host->data->error = -EIO;
6882a8c0 1447 }
d129bceb 1448
17b0429d 1449 if (host->data->error)
d129bceb
PO		 1450 sdhci_finish_data(host);
1451 else {
a406f5a3 1452 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
d129bceb
PO		 1453 sdhci_transfer_pio(host);
1454
6ba736a1
PO		 1455 /*
1456 * We currently don't do anything fancy with DMA
1457 * boundaries, but as we can't disable the feature
1458 * we need to at least restart the transfer.
1459 */
1460 if (intmask & SDHCI_INT_DMA_END)
4e4141a5
AV		 1461 sdhci_writel(host, sdhci_readl(host, SDHCI_DMA_ADDRESS),
1462 SDHCI_DMA_ADDRESS);
6ba736a1 1463
e538fbe8
PO		 1464 if (intmask & SDHCI_INT_DATA_END) {
1465 if (host->cmd) {
1466 /*
1467 * Data managed to finish before the
1468 * command completed. Make sure we do
1469 * things in the proper order.
1470 */
1471 host->data_early = 1;
1472 } else {
1473 sdhci_finish_data(host);
1474 }
1475 }
d129bceb
PO		 1476 }
1477}
1478
7d12e780 1479static irqreturn_t sdhci_irq(int irq, void *dev_id)
d129bceb
PO		 1480{
1481 irqreturn_t result;
1482 struct sdhci_host* host = dev_id;
1483 u32 intmask;
f75979b7 1484 int cardint = 0;
d129bceb
PO		 1485
1486 spin_lock(&host->lock);
1487
4e4141a5 1488 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
d129bceb 1489
62df67a5 1490 if (!intmask || intmask == 0xffffffff) {
d129bceb
PO		 1491 result = IRQ_NONE;
1492 goto out;
1493 }
1494
b69c9058
PO		 1495 DBG("*** %s got interrupt: 0x%08x\n",
1496 mmc_hostname(host->mmc), intmask);
d129bceb 1497
3192a28f 1498 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
4e4141a5
AV		 1499 sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT |
1500 SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
d129bceb 1501 tasklet_schedule(&host->card_tasklet);
3192a28f 1502 }
d129bceb 1503
3192a28f 1504 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
d129bceb 1505
3192a28f 1506 if (intmask & SDHCI_INT_CMD_MASK) {
4e4141a5
AV		 1507 sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK,
1508 SDHCI_INT_STATUS);
3192a28f 1509 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
d129bceb
PO		 1510 }
1511
1512 if (intmask & SDHCI_INT_DATA_MASK) {
4e4141a5
AV		 1513 sdhci_writel(host, intmask & SDHCI_INT_DATA_MASK,
1514 SDHCI_INT_STATUS);
3192a28f 1515 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
d129bceb
PO		 1516 }
1517
1518 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1519
964f9ce2
PO		 1520 intmask &= ~SDHCI_INT_ERROR;
1521
d129bceb 1522 if (intmask & SDHCI_INT_BUS_POWER) {
3192a28f 1523 printk(KERN_ERR "%s: Card is consuming too much power!\n",
d129bceb 1524 mmc_hostname(host->mmc));
4e4141a5 1525 sdhci_writel(host, SDHCI_INT_BUS_POWER, SDHCI_INT_STATUS);
d129bceb
PO		 1526 }
1527
9d26a5d3 1528 intmask &= ~SDHCI_INT_BUS_POWER;
3192a28f 1529
f75979b7
PO		 1530 if (intmask & SDHCI_INT_CARD_INT)
1531 cardint = 1;
1532
1533 intmask &= ~SDHCI_INT_CARD_INT;
1534
3192a28f 1535 if (intmask) {
acf1da45 1536 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
3192a28f 1537 mmc_hostname(host->mmc), intmask);
d129bceb
PO		 1538 sdhci_dumpregs(host);
1539
4e4141a5 1540 sdhci_writel(host, intmask, SDHCI_INT_STATUS);
3192a28f 1541 }
d129bceb
PO		 1542
1543 result = IRQ_HANDLED;
1544
5f25a66f 1545 mmiowb();
d129bceb
PO		 1546out:
1547 spin_unlock(&host->lock);
1548
f75979b7
PO		 1549 /*
1550 * We have to delay this as it calls back into the driver.
1551 */
1552 if (cardint)
1553 mmc_signal_sdio_irq(host->mmc);
1554
d129bceb
PO		 1555 return result;
1556}
1557
1558/*****************************************************************************\
1559 * *
1560 * Suspend/resume *
1561 * *
1562\*****************************************************************************/
1563
1564#ifdef CONFIG_PM
1565
b8c86fc5 1566int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state)
d129bceb 1567{
b8c86fc5 1568 int ret;
a715dfc7 1569
7260cf5e
AV		 1570 sdhci_disable_card_detection(host);
1571
b8c86fc5
PO		 1572 ret = mmc_suspend_host(host->mmc, state);
1573 if (ret)
1574 return ret;
a715dfc7 1575
b8c86fc5 1576 free_irq(host->irq, host);
d129bceb
PO		 1577
1578 return 0;
1579}
1580
b8c86fc5 1581EXPORT_SYMBOL_GPL(sdhci_suspend_host);
d129bceb 1582
b8c86fc5
PO		 1583int sdhci_resume_host(struct sdhci_host *host)
1584{
1585 int ret;
d129bceb 1586
b8c86fc5
PO		 1587 if (host->flags & SDHCI_USE_DMA) {
1588 if (host->ops->enable_dma)
1589 host->ops->enable_dma(host);
1590 }
d129bceb 1591
b8c86fc5
PO		 1592 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1593 mmc_hostname(host->mmc), host);
df1c4b7b
PO		 1594 if (ret)
1595 return ret;
d129bceb 1596
b8c86fc5
PO		 1597 sdhci_init(host);
1598 mmiowb();
1599
1600 ret = mmc_resume_host(host->mmc);
1601 if (ret)
1602 return ret;
d129bceb 1603
7260cf5e
AV		 1604 sdhci_enable_card_detection(host);
1605
d129bceb
PO		 1606 return 0;
1607}
1608
b8c86fc5 1609EXPORT_SYMBOL_GPL(sdhci_resume_host);
d129bceb
PO		 1610
1611#endif /* CONFIG_PM */
1612
1613/*****************************************************************************\
1614 * *
b8c86fc5 1615 * Device allocation/registration *
d129bceb
PO		 1616 * *
1617\*****************************************************************************/
1618
b8c86fc5
PO		 1619struct sdhci_host *sdhci_alloc_host(struct device *dev,
1620 size_t priv_size)
d129bceb 1621{
d129bceb
PO		 1622 struct mmc_host *mmc;
1623 struct sdhci_host *host;
1624
b8c86fc5 1625 WARN_ON(dev == NULL);
d129bceb 1626
b8c86fc5 1627 mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev);
d129bceb 1628 if (!mmc)
b8c86fc5 1629 return ERR_PTR(-ENOMEM);
d129bceb
PO		 1630
1631 host = mmc_priv(mmc);
1632 host->mmc = mmc;
1633
b8c86fc5
PO		 1634 return host;
1635}
8a4da143 1636
b8c86fc5 1637EXPORT_SYMBOL_GPL(sdhci_alloc_host);
d129bceb 1638
b8c86fc5
PO		 1639int sdhci_add_host(struct sdhci_host *host)
1640{
1641 struct mmc_host *mmc;
1642 unsigned int caps;
b8c86fc5 1643 int ret;
d129bceb 1644
b8c86fc5
PO		 1645 WARN_ON(host == NULL);
1646 if (host == NULL)
1647 return -EINVAL;
d129bceb 1648
b8c86fc5 1649 mmc = host->mmc;
d129bceb 1650
b8c86fc5
PO		 1651 if (debug_quirks)
1652 host->quirks = debug_quirks;
d129bceb 1653
d96649ed
PO		 1654 sdhci_reset(host, SDHCI_RESET_ALL);
1655
4e4141a5 1656 host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
2134a922
PO		 1657 host->version = (host->version & SDHCI_SPEC_VER_MASK)
1658 >> SDHCI_SPEC_VER_SHIFT;
1659 if (host->version > SDHCI_SPEC_200) {
4a965505 1660 printk(KERN_ERR "%s: Unknown controller version (%d). "
b69c9058 1661 "You may experience problems.\n", mmc_hostname(mmc),
2134a922 1662 host->version);
4a965505
PO		 1663 }
1664
4e4141a5 1665 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
d129bceb 1666
b8c86fc5 1667 if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
98608076 1668 host->flags |= SDHCI_USE_DMA;
67435274
PO		 1669 else if (!(caps & SDHCI_CAN_DO_DMA))
1670 DBG("Controller doesn't have DMA capability\n");
1671 else
d129bceb
PO		 1672 host->flags |= SDHCI_USE_DMA;
1673
b8c86fc5 1674 if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
7c168e3d 1675 (host->flags & SDHCI_USE_DMA)) {
cee687ce 1676 DBG("Disabling DMA as it is marked broken\n");
7c168e3d
FT		 1677 host->flags &= ~SDHCI_USE_DMA;
1678 }
1679
2134a922
PO		 1680 if (host->flags & SDHCI_USE_DMA) {
1681 if ((host->version >= SDHCI_SPEC_200) &&
1682 (caps & SDHCI_CAN_DO_ADMA2))
1683 host->flags |= SDHCI_USE_ADMA;
1684 }
1685
1686 if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
1687 (host->flags & SDHCI_USE_ADMA)) {
1688 DBG("Disabling ADMA as it is marked broken\n");
1689 host->flags &= ~SDHCI_USE_ADMA;
1690 }
1691
d129bceb 1692 if (host->flags & SDHCI_USE_DMA) {
b8c86fc5
PO		 1693 if (host->ops->enable_dma) {
1694 if (host->ops->enable_dma(host)) {
1695 printk(KERN_WARNING "%s: No suitable DMA "
1696 "available. Falling back to PIO.\n",
1697 mmc_hostname(mmc));
2134a922 1698 host->flags &= ~(SDHCI_USE_DMA | SDHCI_USE_ADMA);
b8c86fc5 1699 }
d129bceb
PO		 1700 }
1701 }
1702
2134a922
PO		 1703 if (host->flags & SDHCI_USE_ADMA) {
1704 /*
1705 * We need to allocate descriptors for all sg entries
1706 * (128) and potentially one alignment transfer for
1707 * each of those entries.
1708 */
1709 host->adma_desc = kmalloc((128 * 2 + 1) * 4, GFP_KERNEL);
1710 host->align_buffer = kmalloc(128 * 4, GFP_KERNEL);
1711 if (!host->adma_desc || !host->align_buffer) {
1712 kfree(host->adma_desc);
1713 kfree(host->align_buffer);
1714 printk(KERN_WARNING "%s: Unable to allocate ADMA "
1715 "buffers. Falling back to standard DMA.\n",
1716 mmc_hostname(mmc));
1717 host->flags &= ~SDHCI_USE_ADMA;
1718 }
1719 }
1720
7659150c
PO		 1721 /*
1722 * If we use DMA, then it's up to the caller to set the DMA
1723 * mask, but PIO does not need the hw shim so we set a new
1724 * mask here in that case.
1725 */
1726 if (!(host->flags & SDHCI_USE_DMA)) {
1727 host->dma_mask = DMA_BIT_MASK(64);
1728 mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
1729 }
d129bceb 1730
8ef1a143
PO		 1731 host->max_clk =
1732 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
4240ff0a 1733 host->max_clk *= 1000000;
8ef1a143 1734 if (host->max_clk == 0) {
4240ff0a
BD		 1735 if (!host->ops->get_max_clock) {
1736 printk(KERN_ERR
1737 "%s: Hardware doesn't specify base clock "
1738 "frequency.\n", mmc_hostname(mmc));
1739 return -ENODEV;
1740 }
1741 host->max_clk = host->ops->get_max_clock(host);
8ef1a143 1742 }
d129bceb 1743
1c8cde92
PO		 1744 host->timeout_clk =
1745 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1746 if (host->timeout_clk == 0) {
4240ff0a
BD		 1747 if (!host->ops->get_timeout_clock) {
1748 printk(KERN_ERR
1749 "%s: Hardware doesn't specify timeout clock "
1750 "frequency.\n", mmc_hostname(mmc));
1751 return -ENODEV;
1752 }
1753 host->timeout_clk = host->ops->get_timeout_clock(host);
1c8cde92
PO		 1754 }
1755 if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1756 host->timeout_clk *= 1000;
d129bceb
PO		 1757
1758 /*
1759 * Set host parameters.
1760 */
1761 mmc->ops = &sdhci_ops;
1762 mmc->f_min = host->max_clk / 256;
1763 mmc->f_max = host->max_clk;
c9b74c5b 1764 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
d129bceb 1765
86a6a874 1766 if (caps & SDHCI_CAN_DO_HISPD)
cd9277c0
PO		 1767 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
1768
68d1fb7e
AV		 1769 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
1770 mmc->caps |= MMC_CAP_NEEDS_POLL;
1771
146ad66e
PO		 1772 mmc->ocr_avail = 0;
1773 if (caps & SDHCI_CAN_VDD_330)
1774 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
c70840e8 1775 if (caps & SDHCI_CAN_VDD_300)
146ad66e 1776 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
c70840e8 1777 if (caps & SDHCI_CAN_VDD_180)
55556da0 1778 mmc->ocr_avail |= MMC_VDD_165_195;
146ad66e
PO		 1779
1780 if (mmc->ocr_avail == 0) {
1781 printk(KERN_ERR "%s: Hardware doesn't report any "
b69c9058 1782 "support voltages.\n", mmc_hostname(mmc));
b8c86fc5 1783 return -ENODEV;
146ad66e
PO		 1784 }
1785
d129bceb
PO		 1786 spin_lock_init(&host->lock);
1787
1788 /*
2134a922
PO		 1789 * Maximum number of segments. Depends on if the hardware
1790 * can do scatter/gather or not.
d129bceb 1791 */
2134a922
PO		 1792 if (host->flags & SDHCI_USE_ADMA)
1793 mmc->max_hw_segs = 128;
1794 else if (host->flags & SDHCI_USE_DMA)
d129bceb 1795 mmc->max_hw_segs = 1;
2134a922
PO		 1796 else /* PIO */
1797 mmc->max_hw_segs = 128;
1798 mmc->max_phys_segs = 128;
d129bceb
PO		 1799
1800 /*
bab76961 1801 * Maximum number of sectors in one transfer. Limited by DMA boundary
55db890a 1802 * size (512KiB).
d129bceb 1803 */
55db890a 1804 mmc->max_req_size = 524288;
d129bceb
PO		 1805
1806 /*
1807 * Maximum segment size. Could be one segment with the maximum number
2134a922
PO		 1808 * of bytes. When doing hardware scatter/gather, each entry cannot
1809 * be larger than 64 KiB though.
d129bceb 1810 */
2134a922
PO		 1811 if (host->flags & SDHCI_USE_ADMA)
1812 mmc->max_seg_size = 65536;
1813 else
1814 mmc->max_seg_size = mmc->max_req_size;
d129bceb 1815
fe4a3c7a
PO		 1816 /*
1817 * Maximum block size. This varies from controller to controller and
1818 * is specified in the capabilities register.
1819 */
0633f654
AV		 1820 if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
1821 mmc->max_blk_size = 2;
1822 } else {
1823 mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >>
1824 SDHCI_MAX_BLOCK_SHIFT;
1825 if (mmc->max_blk_size >= 3) {
1826 printk(KERN_WARNING "%s: Invalid maximum block size, "
1827 "assuming 512 bytes\n", mmc_hostname(mmc));
1828 mmc->max_blk_size = 0;
1829 }
1830 }
1831
1832 mmc->max_blk_size = 512 << mmc->max_blk_size;
fe4a3c7a 1833
55db890a
PO		 1834 /*
1835 * Maximum block count.
1836 */
1388eefd 1837 mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
55db890a 1838
d129bceb
PO		 1839 /*
1840 * Init tasklets.
1841 */
1842 tasklet_init(&host->card_tasklet,
1843 sdhci_tasklet_card, (unsigned long)host);
1844 tasklet_init(&host->finish_tasklet,
1845 sdhci_tasklet_finish, (unsigned long)host);
1846
e4cad1b5 1847 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
d129bceb 1848
dace1453 1849 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
b69c9058 1850 mmc_hostname(mmc), host);
d129bceb 1851 if (ret)
8ef1a143 1852 goto untasklet;
d129bceb
PO		 1853
1854 sdhci_init(host);
1855
1856#ifdef CONFIG_MMC_DEBUG
1857 sdhci_dumpregs(host);
1858#endif
1859
f9134319 1860#ifdef SDHCI_USE_LEDS_CLASS
5dbace0c
HS		 1861 snprintf(host->led_name, sizeof(host->led_name),
1862 "%s::", mmc_hostname(mmc));
1863 host->led.name = host->led_name;
2f730fec
PO		 1864 host->led.brightness = LED_OFF;
1865 host->led.default_trigger = mmc_hostname(mmc);
1866 host->led.brightness_set = sdhci_led_control;
1867
b8c86fc5 1868 ret = led_classdev_register(mmc_dev(mmc), &host->led);
2f730fec
PO		 1869 if (ret)
1870 goto reset;
1871#endif
1872
5f25a66f
PO		 1873 mmiowb();
1874
d129bceb
PO		 1875 mmc_add_host(mmc);
1876
2134a922 1877 printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s%s\n",
d1b26863 1878 mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
2134a922 1879 (host->flags & SDHCI_USE_ADMA)?"A":"",
d129bceb
PO		 1880 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1881
7260cf5e
AV		 1882 sdhci_enable_card_detection(host);
1883
d129bceb
PO		 1884 return 0;
1885
f9134319 1886#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 1887reset:
1888 sdhci_reset(host, SDHCI_RESET_ALL);
1889 free_irq(host->irq, host);
1890#endif
8ef1a143 1891untasklet:
d129bceb
PO		 1892 tasklet_kill(&host->card_tasklet);
1893 tasklet_kill(&host->finish_tasklet);
d129bceb
PO		 1894
1895 return ret;
1896}
1897
b8c86fc5 1898EXPORT_SYMBOL_GPL(sdhci_add_host);
d129bceb 1899
1e72859e 1900void sdhci_remove_host(struct sdhci_host *host, int dead)
b8c86fc5 1901{
1e72859e
PO		 1902 unsigned long flags;
1903
1904 if (dead) {
1905 spin_lock_irqsave(&host->lock, flags);
1906
1907 host->flags |= SDHCI_DEVICE_DEAD;
1908
1909 if (host->mrq) {
1910 printk(KERN_ERR "%s: Controller removed during "
1911 " transfer!\n", mmc_hostname(host->mmc));
1912
1913 host->mrq->cmd->error = -ENOMEDIUM;
1914 tasklet_schedule(&host->finish_tasklet);
1915 }
1916
1917 spin_unlock_irqrestore(&host->lock, flags);
1918 }
1919
7260cf5e
AV		 1920 sdhci_disable_card_detection(host);
1921
b8c86fc5 1922 mmc_remove_host(host->mmc);
d129bceb 1923
f9134319 1924#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 1925 led_classdev_unregister(&host->led);
1926#endif
1927
1e72859e
PO		 1928 if (!dead)
1929 sdhci_reset(host, SDHCI_RESET_ALL);
d129bceb
PO		 1930
1931 free_irq(host->irq, host);
1932
1933 del_timer_sync(&host->timer);
1934
1935 tasklet_kill(&host->card_tasklet);
1936 tasklet_kill(&host->finish_tasklet);
2134a922
PO		 1937
1938 kfree(host->adma_desc);
1939 kfree(host->align_buffer);
1940
1941 host->adma_desc = NULL;
1942 host->align_buffer = NULL;
d129bceb
PO		 1943}
1944
b8c86fc5 1945EXPORT_SYMBOL_GPL(sdhci_remove_host);
d129bceb 1946
b8c86fc5 1947void sdhci_free_host(struct sdhci_host *host)
d129bceb 1948{
b8c86fc5 1949 mmc_free_host(host->mmc);
d129bceb
PO		 1950}
1951
b8c86fc5 1952EXPORT_SYMBOL_GPL(sdhci_free_host);
d129bceb
PO		 1953
1954/*****************************************************************************\
1955 * *
1956 * Driver init/exit *
1957 * *
1958\*****************************************************************************/
1959
1960static int __init sdhci_drv_init(void)
1961{
1962 printk(KERN_INFO DRIVER_NAME
52fbf9c9 1963 ": Secure Digital Host Controller Interface driver\n");
d129bceb
PO		 1964 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1965
b8c86fc5 1966 return 0;
d129bceb
PO		 1967}
1968
1969static void __exit sdhci_drv_exit(void)
1970{
d129bceb
PO		 1971}
1972
1973module_init(sdhci_drv_init);
1974module_exit(sdhci_drv_exit);
1975
df673b22 1976module_param(debug_quirks, uint, 0444);
67435274 1977
32710e8f 1978MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
b8c86fc5 1979MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
d129bceb 1980MODULE_LICENSE("GPL");
67435274 1981
df673b22 1982MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
Ubuntu Artful kernel mirror