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mmc: SDHC 3.0: support 10-bit divided clock mode
[linux-2.6-block.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>
5a0e3ad6 20#include <linux/slab.h>
11763609 21#include <linux/scatterlist.h>
9bea3c85 22#include <linux/regulator/consumer.h>
d129bceb 23
2f730fec
PO		 24#include <linux/leds.h>
25
d129bceb 26#include <linux/mmc/host.h>
d129bceb 27
d129bceb
PO		 28#include "sdhci.h"
29
30#define DRIVER_NAME "sdhci"
d129bceb 31
d129bceb 32#define DBG(f, x...) \
c6563178 33 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
d129bceb 34
f9134319
PO		 35#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
36 defined(CONFIG_MMC_SDHCI_MODULE))
37#define SDHCI_USE_LEDS_CLASS
38#endif
39
df673b22 40static unsigned int debug_quirks = 0;
67435274 41
d129bceb
PO		 42static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
43static void sdhci_finish_data(struct sdhci_host *);
44
45static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
46static void sdhci_finish_command(struct sdhci_host *);
47
48static void sdhci_dumpregs(struct sdhci_host *host)
49{
50 printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
51
52 printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
4e4141a5
AV		 53 sdhci_readl(host, SDHCI_DMA_ADDRESS),
54 sdhci_readw(host, SDHCI_HOST_VERSION));
d129bceb 55 printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
4e4141a5
AV		 56 sdhci_readw(host, SDHCI_BLOCK_SIZE),
57 sdhci_readw(host, SDHCI_BLOCK_COUNT));
d129bceb 58 printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
4e4141a5
AV		 59 sdhci_readl(host, SDHCI_ARGUMENT),
60 sdhci_readw(host, SDHCI_TRANSFER_MODE));
d129bceb 61 printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
4e4141a5
AV		 62 sdhci_readl(host, SDHCI_PRESENT_STATE),
63 sdhci_readb(host, SDHCI_HOST_CONTROL));
d129bceb 64 printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
4e4141a5
AV		 65 sdhci_readb(host, SDHCI_POWER_CONTROL),
66 sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL));
d129bceb 67 printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
4e4141a5
AV		 68 sdhci_readb(host, SDHCI_WAKE_UP_CONTROL),
69 sdhci_readw(host, SDHCI_CLOCK_CONTROL));
d129bceb 70 printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
4e4141a5
AV		 71 sdhci_readb(host, SDHCI_TIMEOUT_CONTROL),
72 sdhci_readl(host, SDHCI_INT_STATUS));
d129bceb 73 printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
4e4141a5
AV		 74 sdhci_readl(host, SDHCI_INT_ENABLE),
75 sdhci_readl(host, SDHCI_SIGNAL_ENABLE));
d129bceb 76 printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
4e4141a5
AV		 77 sdhci_readw(host, SDHCI_ACMD12_ERR),
78 sdhci_readw(host, SDHCI_SLOT_INT_STATUS));
d129bceb 79 printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
4e4141a5
AV		 80 sdhci_readl(host, SDHCI_CAPABILITIES),
81 sdhci_readl(host, SDHCI_MAX_CURRENT));
d129bceb 82
be3f4ae0
BD		 83 if (host->flags & SDHCI_USE_ADMA)
84 printk(KERN_DEBUG DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
85 readl(host->ioaddr + SDHCI_ADMA_ERROR),
86 readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
87
d129bceb
PO		 88 printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
89}
90
91/*****************************************************************************\
92 * *
93 * Low level functions *
94 * *
95\*****************************************************************************/
96
7260cf5e
AV		 97static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
98{
99 u32 ier;
100
101 ier = sdhci_readl(host, SDHCI_INT_ENABLE);
102 ier &= ~clear;
103 ier |= set;
104 sdhci_writel(host, ier, SDHCI_INT_ENABLE);
105 sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE);
106}
107
108static void sdhci_unmask_irqs(struct sdhci_host *host, u32 irqs)
109{
110 sdhci_clear_set_irqs(host, 0, irqs);
111}
112
113static void sdhci_mask_irqs(struct sdhci_host *host, u32 irqs)
114{
115 sdhci_clear_set_irqs(host, irqs, 0);
116}
117
118static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
119{
120 u32 irqs = SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT;
121
68d1fb7e
AV		 122 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
123 return;
124
7260cf5e
AV		 125 if (enable)
126 sdhci_unmask_irqs(host, irqs);
127 else
128 sdhci_mask_irqs(host, irqs);
129}
130
131static void sdhci_enable_card_detection(struct sdhci_host *host)
132{
133 sdhci_set_card_detection(host, true);
134}
135
136static void sdhci_disable_card_detection(struct sdhci_host *host)
137{
138 sdhci_set_card_detection(host, false);
139}
140
d129bceb
PO		 141static void sdhci_reset(struct sdhci_host *host, u8 mask)
142{
e16514d8 143 unsigned long timeout;
063a9dbb 144 u32 uninitialized_var(ier);
e16514d8 145
b8c86fc5 146 if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
4e4141a5 147 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) &
8a4da143
PO		 148 SDHCI_CARD_PRESENT))
149 return;
150 }
151
063a9dbb
AV		 152 if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
153 ier = sdhci_readl(host, SDHCI_INT_ENABLE);
154
4e4141a5 155 sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
d129bceb 156
e16514d8 157 if (mask & SDHCI_RESET_ALL)
d129bceb
PO		 158 host->clock = 0;
159
e16514d8
PO		 160 /* Wait max 100 ms */
161 timeout = 100;
162
163 /* hw clears the bit when it's done */
4e4141a5 164 while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
e16514d8 165 if (timeout == 0) {
acf1da45 166 printk(KERN_ERR "%s: Reset 0x%x never completed.\n",
e16514d8
PO		 167 mmc_hostname(host->mmc), (int)mask);
168 sdhci_dumpregs(host);
169 return;
170 }
171 timeout--;
172 mdelay(1);
d129bceb 173 }
063a9dbb
AV		 174
175 if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
176 sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
d129bceb
PO		 177}
178
2f4cbb3d
NP		 179static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
180
181static void sdhci_init(struct sdhci_host *host, int soft)
d129bceb 182{
2f4cbb3d
NP		 183 if (soft)
184 sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
185 else
186 sdhci_reset(host, SDHCI_RESET_ALL);
d129bceb 187
7260cf5e
AV		 188 sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK,
189 SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
3192a28f
PO		 190 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
191 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
6aa943ab 192 SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE);
2f4cbb3d
NP		 193
194 if (soft) {
195 /* force clock reconfiguration */
196 host->clock = 0;
197 sdhci_set_ios(host->mmc, &host->mmc->ios);
198 }
7260cf5e 199}
d129bceb 200
7260cf5e
AV		 201static void sdhci_reinit(struct sdhci_host *host)
202{
2f4cbb3d 203 sdhci_init(host, 0);
7260cf5e 204 sdhci_enable_card_detection(host);
d129bceb
PO		 205}
206
207static void sdhci_activate_led(struct sdhci_host *host)
208{
209 u8 ctrl;
210
4e4141a5 211 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 212 ctrl |= SDHCI_CTRL_LED;
4e4141a5 213 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 214}
215
216static void sdhci_deactivate_led(struct sdhci_host *host)
217{
218 u8 ctrl;
219
4e4141a5 220 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 221 ctrl &= ~SDHCI_CTRL_LED;
4e4141a5 222 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 223}
224
f9134319 225#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 226static void sdhci_led_control(struct led_classdev *led,
227 enum led_brightness brightness)
228{
229 struct sdhci_host *host = container_of(led, struct sdhci_host, led);
230 unsigned long flags;
231
232 spin_lock_irqsave(&host->lock, flags);
233
234 if (brightness == LED_OFF)
235 sdhci_deactivate_led(host);
236 else
237 sdhci_activate_led(host);
238
239 spin_unlock_irqrestore(&host->lock, flags);
240}
241#endif
242
d129bceb
PO		 243/*****************************************************************************\
244 * *
245 * Core functions *
246 * *
247\*****************************************************************************/
248
a406f5a3 249static void sdhci_read_block_pio(struct sdhci_host *host)
d129bceb 250{
7659150c
PO		 251 unsigned long flags;
252 size_t blksize, len, chunk;
7244b85b 253 u32 uninitialized_var(scratch);
7659150c 254 u8 *buf;
d129bceb 255
a406f5a3 256 DBG("PIO reading\n");
d129bceb 257
a406f5a3 258 blksize = host->data->blksz;
7659150c 259 chunk = 0;
d129bceb 260
7659150c 261 local_irq_save(flags);
d129bceb 262
a406f5a3 263 while (blksize) {
7659150c
PO		 264 if (!sg_miter_next(&host->sg_miter))
265 BUG();
d129bceb 266
7659150c 267 len = min(host->sg_miter.length, blksize);
d129bceb 268
7659150c
PO		 269 blksize -= len;
270 host->sg_miter.consumed = len;
14d836e7 271
7659150c 272 buf = host->sg_miter.addr;
d129bceb 273
7659150c
PO		 274 while (len) {
275 if (chunk == 0) {
4e4141a5 276 scratch = sdhci_readl(host, SDHCI_BUFFER);
7659150c 277 chunk = 4;
a406f5a3 278 }
7659150c
PO		 279
280 *buf = scratch & 0xFF;
281
282 buf++;
283 scratch >>= 8;
284 chunk--;
285 len--;
d129bceb 286 }
a406f5a3 287 }
7659150c
PO		 288
289 sg_miter_stop(&host->sg_miter);
290
291 local_irq_restore(flags);
a406f5a3 292}
d129bceb 293
a406f5a3
PO		 294static void sdhci_write_block_pio(struct sdhci_host *host)
295{
7659150c
PO		 296 unsigned long flags;
297 size_t blksize, len, chunk;
298 u32 scratch;
299 u8 *buf;
d129bceb 300
a406f5a3
PO		 301 DBG("PIO writing\n");
302
303 blksize = host->data->blksz;
7659150c
PO		 304 chunk = 0;
305 scratch = 0;
d129bceb 306
7659150c 307 local_irq_save(flags);
d129bceb 308
a406f5a3 309 while (blksize) {
7659150c
PO		 310 if (!sg_miter_next(&host->sg_miter))
311 BUG();
a406f5a3 312
7659150c
PO		 313 len = min(host->sg_miter.length, blksize);
314
315 blksize -= len;
316 host->sg_miter.consumed = len;
317
318 buf = host->sg_miter.addr;
d129bceb 319
7659150c
PO		 320 while (len) {
321 scratch |= (u32)*buf << (chunk * 8);
322
323 buf++;
324 chunk++;
325 len--;
326
327 if ((chunk == 4) || ((len == 0) && (blksize == 0))) {
4e4141a5 328 sdhci_writel(host, scratch, SDHCI_BUFFER);
7659150c
PO		 329 chunk = 0;
330 scratch = 0;
d129bceb 331 }
d129bceb
PO		 332 }
333 }
7659150c
PO		 334
335 sg_miter_stop(&host->sg_miter);
336
337 local_irq_restore(flags);
a406f5a3
PO		 338}
339
340static void sdhci_transfer_pio(struct sdhci_host *host)
341{
342 u32 mask;
343
344 BUG_ON(!host->data);
345
7659150c 346 if (host->blocks == 0)
a406f5a3
PO		 347 return;
348
349 if (host->data->flags & MMC_DATA_READ)
350 mask = SDHCI_DATA_AVAILABLE;
351 else
352 mask = SDHCI_SPACE_AVAILABLE;
353
4a3cba32
PO		 354 /*
355 * Some controllers (JMicron JMB38x) mess up the buffer bits
356 * for transfers < 4 bytes. As long as it is just one block,
357 * we can ignore the bits.
358 */
359 if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) &&
360 (host->data->blocks == 1))
361 mask = ~0;
362
4e4141a5 363 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
3e3bf207
AV		 364 if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY)
365 udelay(100);
366
a406f5a3
PO		 367 if (host->data->flags & MMC_DATA_READ)
368 sdhci_read_block_pio(host);
369 else
370 sdhci_write_block_pio(host);
d129bceb 371
7659150c
PO		 372 host->blocks--;
373 if (host->blocks == 0)
a406f5a3 374 break;
a406f5a3 375 }
d129bceb 376
a406f5a3 377 DBG("PIO transfer complete.\n");
d129bceb
PO		 378}
379
2134a922
PO		 380static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
381{
382 local_irq_save(*flags);
383 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
384}
385
386static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
387{
388 kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
389 local_irq_restore(*flags);
390}
391
118cd17d
BD		 392static void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd)
393{
9e506f35
BD		 394 __le32 *dataddr = (__le32 __force *)(desc + 4);
395 __le16 *cmdlen = (__le16 __force *)desc;
118cd17d 396
9e506f35
BD		 397 /* SDHCI specification says ADMA descriptors should be 4 byte
398 * aligned, so using 16 or 32bit operations should be safe. */
118cd17d 399
9e506f35
BD		 400 cmdlen[0] = cpu_to_le16(cmd);
401 cmdlen[1] = cpu_to_le16(len);
402
403 dataddr[0] = cpu_to_le32(addr);
118cd17d
BD		 404}
405
8f1934ce 406static int sdhci_adma_table_pre(struct sdhci_host *host,
2134a922
PO		 407 struct mmc_data *data)
408{
409 int direction;
410
411 u8 *desc;
412 u8 *align;
413 dma_addr_t addr;
414 dma_addr_t align_addr;
415 int len, offset;
416
417 struct scatterlist *sg;
418 int i;
419 char *buffer;
420 unsigned long flags;
421
422 /*
423 * The spec does not specify endianness of descriptor table.
424 * We currently guess that it is LE.
425 */
426
427 if (data->flags & MMC_DATA_READ)
428 direction = DMA_FROM_DEVICE;
429 else
430 direction = DMA_TO_DEVICE;
431
432 /*
433 * The ADMA descriptor table is mapped further down as we
434 * need to fill it with data first.
435 */
436
437 host->align_addr = dma_map_single(mmc_dev(host->mmc),
438 host->align_buffer, 128 * 4, direction);
8d8bb39b 439 if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr))
8f1934ce 440 goto fail;
2134a922
PO		 441 BUG_ON(host->align_addr & 0x3);
442
443 host->sg_count = dma_map_sg(mmc_dev(host->mmc),
444 data->sg, data->sg_len, direction);
8f1934ce
PO		 445 if (host->sg_count == 0)
446 goto unmap_align;
2134a922
PO		 447
448 desc = host->adma_desc;
449 align = host->align_buffer;
450
451 align_addr = host->align_addr;
452
453 for_each_sg(data->sg, sg, host->sg_count, i) {
454 addr = sg_dma_address(sg);
455 len = sg_dma_len(sg);
456
457 /*
458 * The SDHCI specification states that ADMA
459 * addresses must be 32-bit aligned. If they
460 * aren't, then we use a bounce buffer for
461 * the (up to three) bytes that screw up the
462 * alignment.
463 */
464 offset = (4 - (addr & 0x3)) & 0x3;
465 if (offset) {
466 if (data->flags & MMC_DATA_WRITE) {
467 buffer = sdhci_kmap_atomic(sg, &flags);
6cefd05f 468 WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3));
2134a922
PO		 469 memcpy(align, buffer, offset);
470 sdhci_kunmap_atomic(buffer, &flags);
471 }
472
118cd17d
BD		 473 /* tran, valid */
474 sdhci_set_adma_desc(desc, align_addr, offset, 0x21);
2134a922
PO		 475
476 BUG_ON(offset > 65536);
477
2134a922
PO		 478 align += 4;
479 align_addr += 4;
480
481 desc += 8;
482
483 addr += offset;
484 len -= offset;
485 }
486
2134a922
PO		 487 BUG_ON(len > 65536);
488
118cd17d
BD		 489 /* tran, valid */
490 sdhci_set_adma_desc(desc, addr, len, 0x21);
2134a922
PO		 491 desc += 8;
492
493 /*
494 * If this triggers then we have a calculation bug
495 * somewhere. :/
496 */
497 WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4);
498 }
499
70764a90
TA		 500 if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) {
501 /*
502 * Mark the last descriptor as the terminating descriptor
503 */
504 if (desc != host->adma_desc) {
505 desc -= 8;
506 desc[0] |= 0x2; /* end */
507 }
508 } else {
509 /*
510 * Add a terminating entry.
511 */
2134a922 512
70764a90
TA		 513 /* nop, end, valid */
514 sdhci_set_adma_desc(desc, 0, 0, 0x3);
515 }
2134a922
PO		 516
517 /*
518 * Resync align buffer as we might have changed it.
519 */
520 if (data->flags & MMC_DATA_WRITE) {
521 dma_sync_single_for_device(mmc_dev(host->mmc),
522 host->align_addr, 128 * 4, direction);
523 }
524
525 host->adma_addr = dma_map_single(mmc_dev(host->mmc),
526 host->adma_desc, (128 * 2 + 1) * 4, DMA_TO_DEVICE);
980167b7 527 if (dma_mapping_error(mmc_dev(host->mmc), host->adma_addr))
8f1934ce 528 goto unmap_entries;
2134a922 529 BUG_ON(host->adma_addr & 0x3);
8f1934ce
PO		 530
531 return 0;
532
533unmap_entries:
534 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
535 data->sg_len, direction);
536unmap_align:
537 dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
538 128 * 4, direction);
539fail:
540 return -EINVAL;
2134a922
PO		 541}
542
543static void sdhci_adma_table_post(struct sdhci_host *host,
544 struct mmc_data *data)
545{
546 int direction;
547
548 struct scatterlist *sg;
549 int i, size;
550 u8 *align;
551 char *buffer;
552 unsigned long flags;
553
554 if (data->flags & MMC_DATA_READ)
555 direction = DMA_FROM_DEVICE;
556 else
557 direction = DMA_TO_DEVICE;
558
559 dma_unmap_single(mmc_dev(host->mmc), host->adma_addr,
560 (128 * 2 + 1) * 4, DMA_TO_DEVICE);
561
562 dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
563 128 * 4, direction);
564
565 if (data->flags & MMC_DATA_READ) {
566 dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg,
567 data->sg_len, direction);
568
569 align = host->align_buffer;
570
571 for_each_sg(data->sg, sg, host->sg_count, i) {
572 if (sg_dma_address(sg) & 0x3) {
573 size = 4 - (sg_dma_address(sg) & 0x3);
574
575 buffer = sdhci_kmap_atomic(sg, &flags);
6cefd05f 576 WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3));
2134a922
PO		 577 memcpy(buffer, align, size);
578 sdhci_kunmap_atomic(buffer, &flags);
579
580 align += 4;
581 }
582 }
583 }
584
585 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
586 data->sg_len, direction);
587}
588
ee53ab5d 589static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
d129bceb 590{
1c8cde92
PO		 591 u8 count;
592 unsigned target_timeout, current_timeout;
d129bceb 593
ee53ab5d
PO		 594 /*
595 * If the host controller provides us with an incorrect timeout
596 * value, just skip the check and use 0xE. The hardware may take
597 * longer to time out, but that's much better than having a too-short
598 * timeout value.
599 */
11a2f1b7 600 if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)
ee53ab5d 601 return 0xE;
e538fbe8 602
1c8cde92
PO		 603 /* timeout in us */
604 target_timeout = data->timeout_ns / 1000 +
605 data->timeout_clks / host->clock;
d129bceb 606
81b39802
AV		 607 if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
608 host->timeout_clk = host->clock / 1000;
609
1c8cde92
PO		 610 /*
611 * Figure out needed cycles.
612 * We do this in steps in order to fit inside a 32 bit int.
613 * The first step is the minimum timeout, which will have a
614 * minimum resolution of 6 bits:
615 * (1) 2^13*1000 > 2^22,
616 * (2) host->timeout_clk < 2^16
617 * =>
618 * (1) / (2) > 2^6
619 */
620 count = 0;
621 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
622 while (current_timeout < target_timeout) {
623 count++;
624 current_timeout <<= 1;
625 if (count >= 0xF)
626 break;
627 }
628
629 if (count >= 0xF) {
630 printk(KERN_WARNING "%s: Too large timeout requested!\n",
631 mmc_hostname(host->mmc));
632 count = 0xE;
633 }
634
ee53ab5d
PO		 635 return count;
636}
637
6aa943ab
AV		 638static void sdhci_set_transfer_irqs(struct sdhci_host *host)
639{
640 u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL;
641 u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR;
642
643 if (host->flags & SDHCI_REQ_USE_DMA)
644 sdhci_clear_set_irqs(host, pio_irqs, dma_irqs);
645 else
646 sdhci_clear_set_irqs(host, dma_irqs, pio_irqs);
647}
648
ee53ab5d
PO		 649static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
650{
651 u8 count;
2134a922 652 u8 ctrl;
8f1934ce 653 int ret;
ee53ab5d
PO		 654
655 WARN_ON(host->data);
656
657 if (data == NULL)
658 return;
659
660 /* Sanity checks */
661 BUG_ON(data->blksz * data->blocks > 524288);
662 BUG_ON(data->blksz > host->mmc->max_blk_size);
663 BUG_ON(data->blocks > 65535);
664
665 host->data = data;
666 host->data_early = 0;
667
668 count = sdhci_calc_timeout(host, data);
4e4141a5 669 sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
d129bceb 670
a13abc7b 671 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))
c9fddbc4
PO		 672 host->flags |= SDHCI_REQ_USE_DMA;
673
2134a922
PO		 674 /*
675 * FIXME: This doesn't account for merging when mapping the
676 * scatterlist.
677 */
678 if (host->flags & SDHCI_REQ_USE_DMA) {
679 int broken, i;
680 struct scatterlist *sg;
681
682 broken = 0;
683 if (host->flags & SDHCI_USE_ADMA) {
684 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
685 broken = 1;
686 } else {
687 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
688 broken = 1;
689 }
690
691 if (unlikely(broken)) {
692 for_each_sg(data->sg, sg, data->sg_len, i) {
693 if (sg->length & 0x3) {
694 DBG("Reverting to PIO because of "
695 "transfer size (%d)\n",
696 sg->length);
697 host->flags &= ~SDHCI_REQ_USE_DMA;
698 break;
699 }
700 }
701 }
c9fddbc4
PO		 702 }
703
704 /*
705 * The assumption here being that alignment is the same after
706 * translation to device address space.
707 */
2134a922
PO		 708 if (host->flags & SDHCI_REQ_USE_DMA) {
709 int broken, i;
710 struct scatterlist *sg;
711
712 broken = 0;
713 if (host->flags & SDHCI_USE_ADMA) {
714 /*
715 * As we use 3 byte chunks to work around
716 * alignment problems, we need to check this
717 * quirk.
718 */
719 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
720 broken = 1;
721 } else {
722 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
723 broken = 1;
724 }
725
726 if (unlikely(broken)) {
727 for_each_sg(data->sg, sg, data->sg_len, i) {
728 if (sg->offset & 0x3) {
729 DBG("Reverting to PIO because of "
730 "bad alignment\n");
731 host->flags &= ~SDHCI_REQ_USE_DMA;
732 break;
733 }
734 }
735 }
736 }
737
8f1934ce
PO		 738 if (host->flags & SDHCI_REQ_USE_DMA) {
739 if (host->flags & SDHCI_USE_ADMA) {
740 ret = sdhci_adma_table_pre(host, data);
741 if (ret) {
742 /*
743 * This only happens when someone fed
744 * us an invalid request.
745 */
746 WARN_ON(1);
ebd6d357 747 host->flags &= ~SDHCI_REQ_USE_DMA;
8f1934ce 748 } else {
4e4141a5
AV		 749 sdhci_writel(host, host->adma_addr,
750 SDHCI_ADMA_ADDRESS);
8f1934ce
PO		 751 }
752 } else {
c8b3e02e 753 int sg_cnt;
8f1934ce 754
c8b3e02e 755 sg_cnt = dma_map_sg(mmc_dev(host->mmc),
8f1934ce
PO		 756 data->sg, data->sg_len,
757 (data->flags & MMC_DATA_READ) ?
758 DMA_FROM_DEVICE :
759 DMA_TO_DEVICE);
c8b3e02e 760 if (sg_cnt == 0) {
8f1934ce
PO		 761 /*
762 * This only happens when someone fed
763 * us an invalid request.
764 */
765 WARN_ON(1);
ebd6d357 766 host->flags &= ~SDHCI_REQ_USE_DMA;
8f1934ce 767 } else {
719a61b4 768 WARN_ON(sg_cnt != 1);
4e4141a5
AV		 769 sdhci_writel(host, sg_dma_address(data->sg),
770 SDHCI_DMA_ADDRESS);
8f1934ce
PO		 771 }
772 }
773 }
774
2134a922
PO		 775 /*
776 * Always adjust the DMA selection as some controllers
777 * (e.g. JMicron) can't do PIO properly when the selection
778 * is ADMA.
779 */
780 if (host->version >= SDHCI_SPEC_200) {
4e4141a5 781 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
2134a922
PO		 782 ctrl &= ~SDHCI_CTRL_DMA_MASK;
783 if ((host->flags & SDHCI_REQ_USE_DMA) &&
784 (host->flags & SDHCI_USE_ADMA))
785 ctrl |= SDHCI_CTRL_ADMA32;
786 else
787 ctrl |= SDHCI_CTRL_SDMA;
4e4141a5 788 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
c9fddbc4
PO		 789 }
790
8f1934ce 791 if (!(host->flags & SDHCI_REQ_USE_DMA)) {
da60a91d
SAS		 792 int flags;
793
794 flags = SG_MITER_ATOMIC;
795 if (host->data->flags & MMC_DATA_READ)
796 flags |= SG_MITER_TO_SG;
797 else
798 flags |= SG_MITER_FROM_SG;
799 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
7659150c 800 host->blocks = data->blocks;
d129bceb 801 }
c7fa9963 802
6aa943ab
AV		 803 sdhci_set_transfer_irqs(host);
804
bab76961 805 /* We do not handle DMA boundaries, so set it to max (512 KiB) */
4e4141a5
AV		 806 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, data->blksz), SDHCI_BLOCK_SIZE);
807 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
c7fa9963
PO		 808}
809
810static void sdhci_set_transfer_mode(struct sdhci_host *host,
811 struct mmc_data *data)
812{
813 u16 mode;
814
c7fa9963
PO		 815 if (data == NULL)
816 return;
817
e538fbe8
PO		 818 WARN_ON(!host->data);
819
c7fa9963 820 mode = SDHCI_TRNS_BLK_CNT_EN;
c4512f79
JH		 821 if (data->blocks > 1) {
822 if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
823 mode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_ACMD12;
824 else
825 mode |= SDHCI_TRNS_MULTI;
826 }
c7fa9963
PO		 827 if (data->flags & MMC_DATA_READ)
828 mode |= SDHCI_TRNS_READ;
c9fddbc4 829 if (host->flags & SDHCI_REQ_USE_DMA)
c7fa9963
PO		 830 mode |= SDHCI_TRNS_DMA;
831
4e4141a5 832 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
d129bceb
PO		 833}
834
835static void sdhci_finish_data(struct sdhci_host *host)
836{
837 struct mmc_data *data;
d129bceb
PO		 838
839 BUG_ON(!host->data);
840
841 data = host->data;
842 host->data = NULL;
843
c9fddbc4 844 if (host->flags & SDHCI_REQ_USE_DMA) {
2134a922
PO		 845 if (host->flags & SDHCI_USE_ADMA)
846 sdhci_adma_table_post(host, data);
847 else {
848 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
849 data->sg_len, (data->flags & MMC_DATA_READ) ?
850 DMA_FROM_DEVICE : DMA_TO_DEVICE);
851 }
d129bceb
PO		 852 }
853
854 /*
c9b74c5b
PO		 855 * The specification states that the block count register must
856 * be updated, but it does not specify at what point in the
857 * data flow. That makes the register entirely useless to read
858 * back so we have to assume that nothing made it to the card
859 * in the event of an error.
d129bceb 860 */
c9b74c5b
PO		 861 if (data->error)
862 data->bytes_xfered = 0;
d129bceb 863 else
c9b74c5b 864 data->bytes_xfered = data->blksz * data->blocks;
d129bceb 865
d129bceb
PO		 866 if (data->stop) {
867 /*
868 * The controller needs a reset of internal state machines
869 * upon error conditions.
870 */
17b0429d 871 if (data->error) {
d129bceb
PO		 872 sdhci_reset(host, SDHCI_RESET_CMD);
873 sdhci_reset(host, SDHCI_RESET_DATA);
874 }
875
876 sdhci_send_command(host, data->stop);
877 } else
878 tasklet_schedule(&host->finish_tasklet);
879}
880
881static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
882{
883 int flags;
fd2208d7 884 u32 mask;
7cb2c76f 885 unsigned long timeout;
d129bceb
PO		 886
887 WARN_ON(host->cmd);
888
d129bceb 889 /* Wait max 10 ms */
7cb2c76f 890 timeout = 10;
fd2208d7
PO		 891
892 mask = SDHCI_CMD_INHIBIT;
893 if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
894 mask |= SDHCI_DATA_INHIBIT;
895
896 /* We shouldn't wait for data inihibit for stop commands, even
897 though they might use busy signaling */
898 if (host->mrq->data && (cmd == host->mrq->data->stop))
899 mask &= ~SDHCI_DATA_INHIBIT;
900
4e4141a5 901 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
7cb2c76f 902 if (timeout == 0) {
d129bceb 903 printk(KERN_ERR "%s: Controller never released "
acf1da45 904 "inhibit bit(s).\n", mmc_hostname(host->mmc));
d129bceb 905 sdhci_dumpregs(host);
17b0429d 906 cmd->error = -EIO;
d129bceb
PO		 907 tasklet_schedule(&host->finish_tasklet);
908 return;
909 }
7cb2c76f
PO		 910 timeout--;
911 mdelay(1);
912 }
d129bceb
PO		 913
914 mod_timer(&host->timer, jiffies + 10 * HZ);
915
916 host->cmd = cmd;
917
918 sdhci_prepare_data(host, cmd->data);
919
4e4141a5 920 sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT);
d129bceb 921
c7fa9963
PO		 922 sdhci_set_transfer_mode(host, cmd->data);
923
d129bceb 924 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
acf1da45 925 printk(KERN_ERR "%s: Unsupported response type!\n",
d129bceb 926 mmc_hostname(host->mmc));
17b0429d 927 cmd->error = -EINVAL;
d129bceb
PO		 928 tasklet_schedule(&host->finish_tasklet);
929 return;
930 }
931
932 if (!(cmd->flags & MMC_RSP_PRESENT))
933 flags = SDHCI_CMD_RESP_NONE;
934 else if (cmd->flags & MMC_RSP_136)
935 flags = SDHCI_CMD_RESP_LONG;
936 else if (cmd->flags & MMC_RSP_BUSY)
937 flags = SDHCI_CMD_RESP_SHORT_BUSY;
938 else
939 flags = SDHCI_CMD_RESP_SHORT;
940
941 if (cmd->flags & MMC_RSP_CRC)
942 flags |= SDHCI_CMD_CRC;
943 if (cmd->flags & MMC_RSP_OPCODE)
944 flags |= SDHCI_CMD_INDEX;
945 if (cmd->data)
946 flags |= SDHCI_CMD_DATA;
947
4e4141a5 948 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
d129bceb
PO		 949}
950
951static void sdhci_finish_command(struct sdhci_host *host)
952{
953 int i;
954
955 BUG_ON(host->cmd == NULL);
956
957 if (host->cmd->flags & MMC_RSP_PRESENT) {
958 if (host->cmd->flags & MMC_RSP_136) {
959 /* CRC is stripped so we need to do some shifting. */
960 for (i = 0;i < 4;i++) {
4e4141a5 961 host->cmd->resp[i] = sdhci_readl(host,
d129bceb
PO		 962 SDHCI_RESPONSE + (3-i)*4) << 8;
963 if (i != 3)
964 host->cmd->resp[i] |=
4e4141a5 965 sdhci_readb(host,
d129bceb
PO		 966 SDHCI_RESPONSE + (3-i)*4-1);
967 }
968 } else {
4e4141a5 969 host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE);
d129bceb
PO		 970 }
971 }
972
17b0429d 973 host->cmd->error = 0;
d129bceb 974
e538fbe8
PO		 975 if (host->data && host->data_early)
976 sdhci_finish_data(host);
977
978 if (!host->cmd->data)
d129bceb
PO		 979 tasklet_schedule(&host->finish_tasklet);
980
981 host->cmd = NULL;
982}
983
984static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
985{
986 int div;
987 u16 clk;
7cb2c76f 988 unsigned long timeout;
d129bceb
PO		 989
990 if (clock == host->clock)
991 return;
992
8114634c
AV		 993 if (host->ops->set_clock) {
994 host->ops->set_clock(host, clock);
995 if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK)
996 return;
997 }
998
4e4141a5 999 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
d129bceb
PO		 1000
1001 if (clock == 0)
1002 goto out;
1003
85105c53
ZG		 1004 if (host->version >= SDHCI_SPEC_300) {
1005 /* Version 3.00 divisors must be a multiple of 2. */
1006 if (host->max_clk <= clock)
1007 div = 1;
1008 else {
1009 for (div = 2; div < 2046; div += 2) {
1010 if ((host->max_clk / div) <= clock)
1011 break;
1012 }
1013 }
1014 } else {
1015 /* Version 2.00 divisors must be a power of 2. */
1016 for (div = 1; div < 256; div *= 2) {
1017 if ((host->max_clk / div) <= clock)
1018 break;
1019 }
d129bceb
PO		 1020 }
1021 div >>= 1;
1022
85105c53
ZG		 1023 clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
1024 clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
1025 << SDHCI_DIVIDER_HI_SHIFT;
d129bceb 1026 clk |= SDHCI_CLOCK_INT_EN;
4e4141a5 1027 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb 1028
27f6cb16
CB		 1029 /* Wait max 20 ms */
1030 timeout = 20;
4e4141a5 1031 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
7cb2c76f
PO		 1032 & SDHCI_CLOCK_INT_STABLE)) {
1033 if (timeout == 0) {
acf1da45
PO		 1034 printk(KERN_ERR "%s: Internal clock never "
1035 "stabilised.\n", mmc_hostname(host->mmc));
d129bceb
PO		 1036 sdhci_dumpregs(host);
1037 return;
1038 }
7cb2c76f
PO		 1039 timeout--;
1040 mdelay(1);
1041 }
d129bceb
PO		 1042
1043 clk |= SDHCI_CLOCK_CARD_EN;
4e4141a5 1044 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb
PO		 1045
1046out:
1047 host->clock = clock;
1048}
1049
146ad66e
PO		 1050static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
1051{
1052 u8 pwr;
1053
ae628903
PO		 1054 if (power == (unsigned short)-1)
1055 pwr = 0;
1056 else {
1057 switch (1 << power) {
1058 case MMC_VDD_165_195:
1059 pwr = SDHCI_POWER_180;
1060 break;
1061 case MMC_VDD_29_30:
1062 case MMC_VDD_30_31:
1063 pwr = SDHCI_POWER_300;
1064 break;
1065 case MMC_VDD_32_33:
1066 case MMC_VDD_33_34:
1067 pwr = SDHCI_POWER_330;
1068 break;
1069 default:
1070 BUG();
1071 }
1072 }
1073
1074 if (host->pwr == pwr)
146ad66e
PO		 1075 return;
1076
ae628903
PO		 1077 host->pwr = pwr;
1078
1079 if (pwr == 0) {
4e4141a5 1080 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
ae628903 1081 return;
9e9dc5f2
DS		 1082 }
1083
1084 /*
1085 * Spec says that we should clear the power reg before setting
1086 * a new value. Some controllers don't seem to like this though.
1087 */
b8c86fc5 1088 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
4e4141a5 1089 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
146ad66e 1090
e08c1694 1091 /*
c71f6512 1092 * At least the Marvell CaFe chip gets confused if we set the voltage
e08c1694
AS		 1093 * and set turn on power at the same time, so set the voltage first.
1094 */
11a2f1b7 1095 if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
ae628903 1096 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
e08c1694 1097
ae628903 1098 pwr |= SDHCI_POWER_ON;
146ad66e 1099
ae628903 1100 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
557b0697
HW		 1101
1102 /*
1103 * Some controllers need an extra 10ms delay of 10ms before they
1104 * can apply clock after applying power
1105 */
11a2f1b7 1106 if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
557b0697 1107 mdelay(10);
146ad66e
PO		 1108}
1109
d129bceb
PO		 1110/*****************************************************************************\
1111 * *
1112 * MMC callbacks *
1113 * *
1114\*****************************************************************************/
1115
1116static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
1117{
1118 struct sdhci_host *host;
68d1fb7e 1119 bool present;
d129bceb
PO		 1120 unsigned long flags;
1121
1122 host = mmc_priv(mmc);
1123
1124 spin_lock_irqsave(&host->lock, flags);
1125
1126 WARN_ON(host->mrq != NULL);
1127
f9134319 1128#ifndef SDHCI_USE_LEDS_CLASS
d129bceb 1129 sdhci_activate_led(host);
2f730fec 1130#endif
c4512f79
JH		 1131 if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) {
1132 if (mrq->stop) {
1133 mrq->data->stop = NULL;
1134 mrq->stop = NULL;
1135 }
1136 }
d129bceb
PO		 1137
1138 host->mrq = mrq;
1139
68d1fb7e
AV		 1140 /* If polling, assume that the card is always present. */
1141 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
1142 present = true;
1143 else
1144 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
1145 SDHCI_CARD_PRESENT;
1146
1147 if (!present || host->flags & SDHCI_DEVICE_DEAD) {
17b0429d 1148 host->mrq->cmd->error = -ENOMEDIUM;
d129bceb
PO		 1149 tasklet_schedule(&host->finish_tasklet);
1150 } else
1151 sdhci_send_command(host, mrq->cmd);
1152
5f25a66f 1153 mmiowb();
d129bceb
PO		 1154 spin_unlock_irqrestore(&host->lock, flags);
1155}
1156
1157static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1158{
1159 struct sdhci_host *host;
1160 unsigned long flags;
1161 u8 ctrl;
1162
1163 host = mmc_priv(mmc);
1164
1165 spin_lock_irqsave(&host->lock, flags);
1166
1e72859e
PO		 1167 if (host->flags & SDHCI_DEVICE_DEAD)
1168 goto out;
1169
d129bceb
PO		 1170 /*
1171 * Reset the chip on each power off.
1172 * Should clear out any weird states.
1173 */
1174 if (ios->power_mode == MMC_POWER_OFF) {
4e4141a5 1175 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
7260cf5e 1176 sdhci_reinit(host);
d129bceb
PO		 1177 }
1178
1179 sdhci_set_clock(host, ios->clock);
1180
1181 if (ios->power_mode == MMC_POWER_OFF)
146ad66e 1182 sdhci_set_power(host, -1);
d129bceb 1183 else
146ad66e 1184 sdhci_set_power(host, ios->vdd);
d129bceb 1185
4e4141a5 1186 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
cd9277c0 1187
ae6d6c92
KP		 1188 if (ios->bus_width == MMC_BUS_WIDTH_8)
1189 ctrl |= SDHCI_CTRL_8BITBUS;
1190 else
1191 ctrl &= ~SDHCI_CTRL_8BITBUS;
1192
d129bceb
PO		 1193 if (ios->bus_width == MMC_BUS_WIDTH_4)
1194 ctrl |= SDHCI_CTRL_4BITBUS;
1195 else
1196 ctrl &= ~SDHCI_CTRL_4BITBUS;
cd9277c0 1197
51932501
KP		 1198 if (ios->timing == MMC_TIMING_SD_HS &&
1199 !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT))
cd9277c0
PO		 1200 ctrl |= SDHCI_CTRL_HISPD;
1201 else
1202 ctrl &= ~SDHCI_CTRL_HISPD;
1203
4e4141a5 1204 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb 1205
b8352260
LD		 1206 /*
1207 * Some (ENE) controllers go apeshit on some ios operation,
1208 * signalling timeout and CRC errors even on CMD0. Resetting
1209 * it on each ios seems to solve the problem.
1210 */
b8c86fc5 1211 if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
b8352260
LD		 1212 sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
1213
1e72859e 1214out:
5f25a66f 1215 mmiowb();
d129bceb
PO		 1216 spin_unlock_irqrestore(&host->lock, flags);
1217}
1218
1219static int sdhci_get_ro(struct mmc_host *mmc)
1220{
1221 struct sdhci_host *host;
1222 unsigned long flags;
1223 int present;
1224
1225 host = mmc_priv(mmc);
1226
1227 spin_lock_irqsave(&host->lock, flags);
1228
1e72859e
PO		 1229 if (host->flags & SDHCI_DEVICE_DEAD)
1230 present = 0;
1231 else
4e4141a5 1232 present = sdhci_readl(host, SDHCI_PRESENT_STATE);
d129bceb
PO		 1233
1234 spin_unlock_irqrestore(&host->lock, flags);
1235
c5075a10
AV		 1236 if (host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT)
1237 return !!(present & SDHCI_WRITE_PROTECT);
d129bceb
PO		 1238 return !(present & SDHCI_WRITE_PROTECT);
1239}
1240
f75979b7
PO		 1241static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
1242{
1243 struct sdhci_host *host;
1244 unsigned long flags;
f75979b7
PO		 1245
1246 host = mmc_priv(mmc);
1247
1248 spin_lock_irqsave(&host->lock, flags);
1249
1e72859e
PO		 1250 if (host->flags & SDHCI_DEVICE_DEAD)
1251 goto out;
1252
f75979b7 1253 if (enable)
7260cf5e
AV		 1254 sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT);
1255 else
1256 sdhci_mask_irqs(host, SDHCI_INT_CARD_INT);
1e72859e 1257out:
f75979b7
PO		 1258 mmiowb();
1259
1260 spin_unlock_irqrestore(&host->lock, flags);
1261}
1262
ab7aefd0 1263static const struct mmc_host_ops sdhci_ops = {
d129bceb
PO		 1264 .request = sdhci_request,
1265 .set_ios = sdhci_set_ios,
1266 .get_ro = sdhci_get_ro,
f75979b7 1267 .enable_sdio_irq = sdhci_enable_sdio_irq,
d129bceb
PO		 1268};
1269
1270/*****************************************************************************\
1271 * *
1272 * Tasklets *
1273 * *
1274\*****************************************************************************/
1275
1276static void sdhci_tasklet_card(unsigned long param)
1277{
1278 struct sdhci_host *host;
1279 unsigned long flags;
1280
1281 host = (struct sdhci_host*)param;
1282
1283 spin_lock_irqsave(&host->lock, flags);
1284
4e4141a5 1285 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
d129bceb
PO		 1286 if (host->mrq) {
1287 printk(KERN_ERR "%s: Card removed during transfer!\n",
1288 mmc_hostname(host->mmc));
1289 printk(KERN_ERR "%s: Resetting controller.\n",
1290 mmc_hostname(host->mmc));
1291
1292 sdhci_reset(host, SDHCI_RESET_CMD);
1293 sdhci_reset(host, SDHCI_RESET_DATA);
1294
17b0429d 1295 host->mrq->cmd->error = -ENOMEDIUM;
d129bceb
PO		 1296 tasklet_schedule(&host->finish_tasklet);
1297 }
1298 }
1299
1300 spin_unlock_irqrestore(&host->lock, flags);
1301
04cf585d 1302 mmc_detect_change(host->mmc, msecs_to_jiffies(200));
d129bceb
PO		 1303}
1304
1305static void sdhci_tasklet_finish(unsigned long param)
1306{
1307 struct sdhci_host *host;
1308 unsigned long flags;
1309 struct mmc_request *mrq;
1310
1311 host = (struct sdhci_host*)param;
1312
1313 spin_lock_irqsave(&host->lock, flags);
1314
1315 del_timer(&host->timer);
1316
1317 mrq = host->mrq;
1318
d129bceb
PO		 1319 /*
1320 * The controller needs a reset of internal state machines
1321 * upon error conditions.
1322 */
1e72859e
PO		 1323 if (!(host->flags & SDHCI_DEVICE_DEAD) &&
1324 (mrq->cmd->error ||
1325 (mrq->data && (mrq->data->error ||
1326 (mrq->data->stop && mrq->data->stop->error))) ||
1327 (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
645289dc
PO		 1328
1329 /* Some controllers need this kick or reset won't work here */
b8c86fc5 1330 if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
645289dc
PO		 1331 unsigned int clock;
1332
1333 /* This is to force an update */
1334 clock = host->clock;
1335 host->clock = 0;
1336 sdhci_set_clock(host, clock);
1337 }
1338
1339 /* Spec says we should do both at the same time, but Ricoh
1340 controllers do not like that. */
d129bceb
PO		 1341 sdhci_reset(host, SDHCI_RESET_CMD);
1342 sdhci_reset(host, SDHCI_RESET_DATA);
1343 }
1344
1345 host->mrq = NULL;
1346 host->cmd = NULL;
1347 host->data = NULL;
1348
f9134319 1349#ifndef SDHCI_USE_LEDS_CLASS
d129bceb 1350 sdhci_deactivate_led(host);
2f730fec 1351#endif
d129bceb 1352
5f25a66f 1353 mmiowb();
d129bceb
PO		 1354 spin_unlock_irqrestore(&host->lock, flags);
1355
1356 mmc_request_done(host->mmc, mrq);
1357}
1358
1359static void sdhci_timeout_timer(unsigned long data)
1360{
1361 struct sdhci_host *host;
1362 unsigned long flags;
1363
1364 host = (struct sdhci_host*)data;
1365
1366 spin_lock_irqsave(&host->lock, flags);
1367
1368 if (host->mrq) {
acf1da45
PO		 1369 printk(KERN_ERR "%s: Timeout waiting for hardware "
1370 "interrupt.\n", mmc_hostname(host->mmc));
d129bceb
PO		 1371 sdhci_dumpregs(host);
1372
1373 if (host->data) {
17b0429d 1374 host->data->error = -ETIMEDOUT;
d129bceb
PO		 1375 sdhci_finish_data(host);
1376 } else {
1377 if (host->cmd)
17b0429d 1378 host->cmd->error = -ETIMEDOUT;
d129bceb 1379 else
17b0429d 1380 host->mrq->cmd->error = -ETIMEDOUT;
d129bceb
PO		 1381
1382 tasklet_schedule(&host->finish_tasklet);
1383 }
1384 }
1385
5f25a66f 1386 mmiowb();
d129bceb
PO		 1387 spin_unlock_irqrestore(&host->lock, flags);
1388}
1389
1390/*****************************************************************************\
1391 * *
1392 * Interrupt handling *
1393 * *
1394\*****************************************************************************/
1395
1396static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
1397{
1398 BUG_ON(intmask == 0);
1399
1400 if (!host->cmd) {
b67ac3f3
PO		 1401 printk(KERN_ERR "%s: Got command interrupt 0x%08x even "
1402 "though no command operation was in progress.\n",
1403 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 1404 sdhci_dumpregs(host);
1405 return;
1406 }
1407
43b58b36 1408 if (intmask & SDHCI_INT_TIMEOUT)
17b0429d
PO		 1409 host->cmd->error = -ETIMEDOUT;
1410 else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT |
1411 SDHCI_INT_INDEX))
1412 host->cmd->error = -EILSEQ;
43b58b36 1413
e809517f 1414 if (host->cmd->error) {
d129bceb 1415 tasklet_schedule(&host->finish_tasklet);
e809517f
PO		 1416 return;
1417 }
1418
1419 /*
1420 * The host can send and interrupt when the busy state has
1421 * ended, allowing us to wait without wasting CPU cycles.
1422 * Unfortunately this is overloaded on the "data complete"
1423 * interrupt, so we need to take some care when handling
1424 * it.
1425 *
1426 * Note: The 1.0 specification is a bit ambiguous about this
1427 * feature so there might be some problems with older
1428 * controllers.
1429 */
1430 if (host->cmd->flags & MMC_RSP_BUSY) {
1431 if (host->cmd->data)
1432 DBG("Cannot wait for busy signal when also "
1433 "doing a data transfer");
f945405c 1434 else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ))
e809517f 1435 return;
f945405c
BD		 1436
1437 /* The controller does not support the end-of-busy IRQ,
1438 * fall through and take the SDHCI_INT_RESPONSE */
e809517f
PO		 1439 }
1440
1441 if (intmask & SDHCI_INT_RESPONSE)
43b58b36 1442 sdhci_finish_command(host);
d129bceb
PO		 1443}
1444
0957c333 1445#ifdef CONFIG_MMC_DEBUG
6882a8c0
BD		 1446static void sdhci_show_adma_error(struct sdhci_host *host)
1447{
1448 const char *name = mmc_hostname(host->mmc);
1449 u8 *desc = host->adma_desc;
1450 __le32 *dma;
1451 __le16 *len;
1452 u8 attr;
1453
1454 sdhci_dumpregs(host);
1455
1456 while (true) {
1457 dma = (__le32 *)(desc + 4);
1458 len = (__le16 *)(desc + 2);
1459 attr = *desc;
1460
1461 DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n",
1462 name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr);
1463
1464 desc += 8;
1465
1466 if (attr & 2)
1467 break;
1468 }
1469}
1470#else
1471static void sdhci_show_adma_error(struct sdhci_host *host) { }
1472#endif
1473
d129bceb
PO		 1474static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
1475{
1476 BUG_ON(intmask == 0);
1477
1478 if (!host->data) {
1479 /*
e809517f
PO		 1480 * The "data complete" interrupt is also used to
1481 * indicate that a busy state has ended. See comment
1482 * above in sdhci_cmd_irq().
d129bceb 1483 */
e809517f
PO		 1484 if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) {
1485 if (intmask & SDHCI_INT_DATA_END) {
1486 sdhci_finish_command(host);
1487 return;
1488 }
1489 }
d129bceb 1490
b67ac3f3
PO		 1491 printk(KERN_ERR "%s: Got data interrupt 0x%08x even "
1492 "though no data operation was in progress.\n",
1493 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 1494 sdhci_dumpregs(host);
1495
1496 return;
1497 }
1498
1499 if (intmask & SDHCI_INT_DATA_TIMEOUT)
17b0429d
PO		 1500 host->data->error = -ETIMEDOUT;
1501 else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
1502 host->data->error = -EILSEQ;
6882a8c0
BD		 1503 else if (intmask & SDHCI_INT_ADMA_ERROR) {
1504 printk(KERN_ERR "%s: ADMA error\n", mmc_hostname(host->mmc));
1505 sdhci_show_adma_error(host);
2134a922 1506 host->data->error = -EIO;
6882a8c0 1507 }
d129bceb 1508
17b0429d 1509 if (host->data->error)
d129bceb
PO		 1510 sdhci_finish_data(host);
1511 else {
a406f5a3 1512 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
d129bceb
PO		 1513 sdhci_transfer_pio(host);
1514
6ba736a1
PO		 1515 /*
1516 * We currently don't do anything fancy with DMA
1517 * boundaries, but as we can't disable the feature
1518 * we need to at least restart the transfer.
1519 */
1520 if (intmask & SDHCI_INT_DMA_END)
4e4141a5
AV		 1521 sdhci_writel(host, sdhci_readl(host, SDHCI_DMA_ADDRESS),
1522 SDHCI_DMA_ADDRESS);
6ba736a1 1523
e538fbe8
PO		 1524 if (intmask & SDHCI_INT_DATA_END) {
1525 if (host->cmd) {
1526 /*
1527 * Data managed to finish before the
1528 * command completed. Make sure we do
1529 * things in the proper order.
1530 */
1531 host->data_early = 1;
1532 } else {
1533 sdhci_finish_data(host);
1534 }
1535 }
d129bceb
PO		 1536 }
1537}
1538
7d12e780 1539static irqreturn_t sdhci_irq(int irq, void *dev_id)
d129bceb
PO		 1540{
1541 irqreturn_t result;
1542 struct sdhci_host* host = dev_id;
1543 u32 intmask;
f75979b7 1544 int cardint = 0;
d129bceb
PO		 1545
1546 spin_lock(&host->lock);
1547
4e4141a5 1548 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
d129bceb 1549
62df67a5 1550 if (!intmask || intmask == 0xffffffff) {
d129bceb
PO		 1551 result = IRQ_NONE;
1552 goto out;
1553 }
1554
b69c9058
PO		 1555 DBG("*** %s got interrupt: 0x%08x\n",
1556 mmc_hostname(host->mmc), intmask);
d129bceb 1557
3192a28f 1558 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
4e4141a5
AV		 1559 sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT |
1560 SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
d129bceb 1561 tasklet_schedule(&host->card_tasklet);
3192a28f 1562 }
d129bceb 1563
3192a28f 1564 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
d129bceb 1565
3192a28f 1566 if (intmask & SDHCI_INT_CMD_MASK) {
4e4141a5
AV		 1567 sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK,
1568 SDHCI_INT_STATUS);
3192a28f 1569 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
d129bceb
PO		 1570 }
1571
1572 if (intmask & SDHCI_INT_DATA_MASK) {
4e4141a5
AV		 1573 sdhci_writel(host, intmask & SDHCI_INT_DATA_MASK,
1574 SDHCI_INT_STATUS);
3192a28f 1575 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
d129bceb
PO		 1576 }
1577
1578 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1579
964f9ce2
PO		 1580 intmask &= ~SDHCI_INT_ERROR;
1581
d129bceb 1582 if (intmask & SDHCI_INT_BUS_POWER) {
3192a28f 1583 printk(KERN_ERR "%s: Card is consuming too much power!\n",
d129bceb 1584 mmc_hostname(host->mmc));
4e4141a5 1585 sdhci_writel(host, SDHCI_INT_BUS_POWER, SDHCI_INT_STATUS);
d129bceb
PO		 1586 }
1587
9d26a5d3 1588 intmask &= ~SDHCI_INT_BUS_POWER;
3192a28f 1589
f75979b7
PO		 1590 if (intmask & SDHCI_INT_CARD_INT)
1591 cardint = 1;
1592
1593 intmask &= ~SDHCI_INT_CARD_INT;
1594
3192a28f 1595 if (intmask) {
acf1da45 1596 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
3192a28f 1597 mmc_hostname(host->mmc), intmask);
d129bceb
PO		 1598 sdhci_dumpregs(host);
1599
4e4141a5 1600 sdhci_writel(host, intmask, SDHCI_INT_STATUS);
3192a28f 1601 }
d129bceb
PO		 1602
1603 result = IRQ_HANDLED;
1604
5f25a66f 1605 mmiowb();
d129bceb
PO		 1606out:
1607 spin_unlock(&host->lock);
1608
f75979b7
PO		 1609 /*
1610 * We have to delay this as it calls back into the driver.
1611 */
1612 if (cardint)
1613 mmc_signal_sdio_irq(host->mmc);
1614
d129bceb
PO		 1615 return result;
1616}
1617
1618/*****************************************************************************\
1619 * *
1620 * Suspend/resume *
1621 * *
1622\*****************************************************************************/
1623
1624#ifdef CONFIG_PM
1625
b8c86fc5 1626int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state)
d129bceb 1627{
b8c86fc5 1628 int ret;
a715dfc7 1629
7260cf5e
AV		 1630 sdhci_disable_card_detection(host);
1631
1a13f8fa 1632 ret = mmc_suspend_host(host->mmc);
b8c86fc5
PO		 1633 if (ret)
1634 return ret;
a715dfc7 1635
b8c86fc5 1636 free_irq(host->irq, host);
d129bceb 1637
9bea3c85
MS		 1638 if (host->vmmc)
1639 ret = regulator_disable(host->vmmc);
1640
1641 return ret;
d129bceb
PO		 1642}
1643
b8c86fc5 1644EXPORT_SYMBOL_GPL(sdhci_suspend_host);
d129bceb 1645
b8c86fc5
PO		 1646int sdhci_resume_host(struct sdhci_host *host)
1647{
1648 int ret;
d129bceb 1649
9bea3c85
MS		 1650 if (host->vmmc) {
1651 int ret = regulator_enable(host->vmmc);
1652 if (ret)
1653 return ret;
1654 }
1655
1656
a13abc7b 1657 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
b8c86fc5
PO		 1658 if (host->ops->enable_dma)
1659 host->ops->enable_dma(host);
1660 }
d129bceb 1661
b8c86fc5
PO		 1662 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1663 mmc_hostname(host->mmc), host);
df1c4b7b
PO		 1664 if (ret)
1665 return ret;
d129bceb 1666
2f4cbb3d 1667 sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
b8c86fc5
PO		 1668 mmiowb();
1669
1670 ret = mmc_resume_host(host->mmc);
7260cf5e
AV		 1671 sdhci_enable_card_detection(host);
1672
2f4cbb3d 1673 return ret;
d129bceb
PO		 1674}
1675
b8c86fc5 1676EXPORT_SYMBOL_GPL(sdhci_resume_host);
d129bceb
PO		 1677
1678#endif /* CONFIG_PM */
1679
1680/*****************************************************************************\
1681 * *
b8c86fc5 1682 * Device allocation/registration *
d129bceb
PO		 1683 * *
1684\*****************************************************************************/
1685
b8c86fc5
PO		 1686struct sdhci_host *sdhci_alloc_host(struct device *dev,
1687 size_t priv_size)
d129bceb 1688{
d129bceb
PO		 1689 struct mmc_host *mmc;
1690 struct sdhci_host *host;
1691
b8c86fc5 1692 WARN_ON(dev == NULL);
d129bceb 1693
b8c86fc5 1694 mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev);
d129bceb 1695 if (!mmc)
b8c86fc5 1696 return ERR_PTR(-ENOMEM);
d129bceb
PO		 1697
1698 host = mmc_priv(mmc);
1699 host->mmc = mmc;
1700
b8c86fc5
PO		 1701 return host;
1702}
8a4da143 1703
b8c86fc5 1704EXPORT_SYMBOL_GPL(sdhci_alloc_host);
d129bceb 1705
b8c86fc5
PO		 1706int sdhci_add_host(struct sdhci_host *host)
1707{
1708 struct mmc_host *mmc;
1709 unsigned int caps;
b8c86fc5 1710 int ret;
d129bceb 1711
b8c86fc5
PO		 1712 WARN_ON(host == NULL);
1713 if (host == NULL)
1714 return -EINVAL;
d129bceb 1715
b8c86fc5 1716 mmc = host->mmc;
d129bceb 1717
b8c86fc5
PO		 1718 if (debug_quirks)
1719 host->quirks = debug_quirks;
d129bceb 1720
d96649ed
PO		 1721 sdhci_reset(host, SDHCI_RESET_ALL);
1722
4e4141a5 1723 host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
2134a922
PO		 1724 host->version = (host->version & SDHCI_SPEC_VER_MASK)
1725 >> SDHCI_SPEC_VER_SHIFT;
85105c53 1726 if (host->version > SDHCI_SPEC_300) {
4a965505 1727 printk(KERN_ERR "%s: Unknown controller version (%d). "
b69c9058 1728 "You may experience problems.\n", mmc_hostname(mmc),
2134a922 1729 host->version);
4a965505
PO		 1730 }
1731
ccc92c23
ML		 1732 caps = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps :
1733 sdhci_readl(host, SDHCI_CAPABILITIES);
d129bceb 1734
b8c86fc5 1735 if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
a13abc7b
RR		 1736 host->flags |= SDHCI_USE_SDMA;
1737 else if (!(caps & SDHCI_CAN_DO_SDMA))
1738 DBG("Controller doesn't have SDMA capability\n");
67435274 1739 else
a13abc7b 1740 host->flags |= SDHCI_USE_SDMA;
d129bceb 1741
b8c86fc5 1742 if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
a13abc7b 1743 (host->flags & SDHCI_USE_SDMA)) {
cee687ce 1744 DBG("Disabling DMA as it is marked broken\n");
a13abc7b 1745 host->flags &= ~SDHCI_USE_SDMA;
7c168e3d
FT		 1746 }
1747
a13abc7b
RR		 1748 if ((host->version >= SDHCI_SPEC_200) && (caps & SDHCI_CAN_DO_ADMA2))
1749 host->flags |= SDHCI_USE_ADMA;
2134a922
PO		 1750
1751 if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
1752 (host->flags & SDHCI_USE_ADMA)) {
1753 DBG("Disabling ADMA as it is marked broken\n");
1754 host->flags &= ~SDHCI_USE_ADMA;
1755 }
1756
a13abc7b 1757 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
b8c86fc5
PO		 1758 if (host->ops->enable_dma) {
1759 if (host->ops->enable_dma(host)) {
1760 printk(KERN_WARNING "%s: No suitable DMA "
1761 "available. Falling back to PIO.\n",
1762 mmc_hostname(mmc));
a13abc7b
RR		 1763 host->flags &=
1764 ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA);
b8c86fc5 1765 }
d129bceb
PO		 1766 }
1767 }
1768
2134a922
PO		 1769 if (host->flags & SDHCI_USE_ADMA) {
1770 /*
1771 * We need to allocate descriptors for all sg entries
1772 * (128) and potentially one alignment transfer for
1773 * each of those entries.
1774 */
1775 host->adma_desc = kmalloc((128 * 2 + 1) * 4, GFP_KERNEL);
1776 host->align_buffer = kmalloc(128 * 4, GFP_KERNEL);
1777 if (!host->adma_desc || !host->align_buffer) {
1778 kfree(host->adma_desc);
1779 kfree(host->align_buffer);
1780 printk(KERN_WARNING "%s: Unable to allocate ADMA "
1781 "buffers. Falling back to standard DMA.\n",
1782 mmc_hostname(mmc));
1783 host->flags &= ~SDHCI_USE_ADMA;
1784 }
1785 }
1786
7659150c
PO		 1787 /*
1788 * If we use DMA, then it's up to the caller to set the DMA
1789 * mask, but PIO does not need the hw shim so we set a new
1790 * mask here in that case.
1791 */
a13abc7b 1792 if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) {
7659150c
PO		 1793 host->dma_mask = DMA_BIT_MASK(64);
1794 mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
1795 }
d129bceb 1796
8ef1a143
PO		 1797 host->max_clk =
1798 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
4240ff0a 1799 host->max_clk *= 1000000;
f27f47ef
AV		 1800 if (host->max_clk == 0 || host->quirks &
1801 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) {
4240ff0a
BD		 1802 if (!host->ops->get_max_clock) {
1803 printk(KERN_ERR
1804 "%s: Hardware doesn't specify base clock "
1805 "frequency.\n", mmc_hostname(mmc));
1806 return -ENODEV;
1807 }
1808 host->max_clk = host->ops->get_max_clock(host);
8ef1a143 1809 }
d129bceb 1810
1c8cde92
PO		 1811 host->timeout_clk =
1812 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1813 if (host->timeout_clk == 0) {
81b39802
AV		 1814 if (host->ops->get_timeout_clock) {
1815 host->timeout_clk = host->ops->get_timeout_clock(host);
1816 } else if (!(host->quirks &
1817 SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) {
4240ff0a
BD		 1818 printk(KERN_ERR
1819 "%s: Hardware doesn't specify timeout clock "
1820 "frequency.\n", mmc_hostname(mmc));
1821 return -ENODEV;
1822 }
1c8cde92
PO		 1823 }
1824 if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1825 host->timeout_clk *= 1000;
d129bceb
PO		 1826
1827 /*
1828 * Set host parameters.
1829 */
1830 mmc->ops = &sdhci_ops;
ce5f036b 1831 if (host->ops->get_min_clock)
a9e58f25
AV		 1832 mmc->f_min = host->ops->get_min_clock(host);
1833 else
1834 mmc->f_min = host->max_clk / 256;
d129bceb 1835 mmc->f_max = host->max_clk;
c1f5977c 1836 mmc->caps |= MMC_CAP_SDIO_IRQ;
5fe23c7f
AV		 1837
1838 if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
1839 mmc->caps |= MMC_CAP_4_BIT_DATA;
d129bceb 1840
86a6a874 1841 if (caps & SDHCI_CAN_DO_HISPD)
cd9277c0
PO		 1842 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
1843
68d1fb7e
AV		 1844 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
1845 mmc->caps |= MMC_CAP_NEEDS_POLL;
1846
146ad66e
PO		 1847 mmc->ocr_avail = 0;
1848 if (caps & SDHCI_CAN_VDD_330)
1849 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
c70840e8 1850 if (caps & SDHCI_CAN_VDD_300)
146ad66e 1851 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
c70840e8 1852 if (caps & SDHCI_CAN_VDD_180)
55556da0 1853 mmc->ocr_avail |= MMC_VDD_165_195;
146ad66e
PO		 1854
1855 if (mmc->ocr_avail == 0) {
1856 printk(KERN_ERR "%s: Hardware doesn't report any "
b69c9058 1857 "support voltages.\n", mmc_hostname(mmc));
b8c86fc5 1858 return -ENODEV;
146ad66e
PO		 1859 }
1860
d129bceb
PO		 1861 spin_lock_init(&host->lock);
1862
1863 /*
2134a922
PO		 1864 * Maximum number of segments. Depends on if the hardware
1865 * can do scatter/gather or not.
d129bceb 1866 */
2134a922 1867 if (host->flags & SDHCI_USE_ADMA)
a36274e0 1868 mmc->max_segs = 128;
a13abc7b 1869 else if (host->flags & SDHCI_USE_SDMA)
a36274e0 1870 mmc->max_segs = 1;
2134a922 1871 else /* PIO */
a36274e0 1872 mmc->max_segs = 128;
d129bceb
PO		 1873
1874 /*
bab76961 1875 * Maximum number of sectors in one transfer. Limited by DMA boundary
55db890a 1876 * size (512KiB).
d129bceb 1877 */
55db890a 1878 mmc->max_req_size = 524288;
d129bceb
PO		 1879
1880 /*
1881 * Maximum segment size. Could be one segment with the maximum number
2134a922
PO		 1882 * of bytes. When doing hardware scatter/gather, each entry cannot
1883 * be larger than 64 KiB though.
d129bceb 1884 */
2134a922
PO		 1885 if (host->flags & SDHCI_USE_ADMA)
1886 mmc->max_seg_size = 65536;
1887 else
1888 mmc->max_seg_size = mmc->max_req_size;
d129bceb 1889
fe4a3c7a
PO		 1890 /*
1891 * Maximum block size. This varies from controller to controller and
1892 * is specified in the capabilities register.
1893 */
0633f654
AV		 1894 if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
1895 mmc->max_blk_size = 2;
1896 } else {
1897 mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >>
1898 SDHCI_MAX_BLOCK_SHIFT;
1899 if (mmc->max_blk_size >= 3) {
1900 printk(KERN_WARNING "%s: Invalid maximum block size, "
1901 "assuming 512 bytes\n", mmc_hostname(mmc));
1902 mmc->max_blk_size = 0;
1903 }
1904 }
1905
1906 mmc->max_blk_size = 512 << mmc->max_blk_size;
fe4a3c7a 1907
55db890a
PO		 1908 /*
1909 * Maximum block count.
1910 */
1388eefd 1911 mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
55db890a 1912
d129bceb
PO		 1913 /*
1914 * Init tasklets.
1915 */
1916 tasklet_init(&host->card_tasklet,
1917 sdhci_tasklet_card, (unsigned long)host);
1918 tasklet_init(&host->finish_tasklet,
1919 sdhci_tasklet_finish, (unsigned long)host);
1920
e4cad1b5 1921 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
d129bceb 1922
dace1453 1923 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
b69c9058 1924 mmc_hostname(mmc), host);
d129bceb 1925 if (ret)
8ef1a143 1926 goto untasklet;
d129bceb 1927
9bea3c85
MS		 1928 host->vmmc = regulator_get(mmc_dev(mmc), "vmmc");
1929 if (IS_ERR(host->vmmc)) {
1930 printk(KERN_INFO "%s: no vmmc regulator found\n", mmc_hostname(mmc));
1931 host->vmmc = NULL;
1932 } else {
1933 regulator_enable(host->vmmc);
1934 }
1935
2f4cbb3d 1936 sdhci_init(host, 0);
d129bceb
PO		 1937
1938#ifdef CONFIG_MMC_DEBUG
1939 sdhci_dumpregs(host);
1940#endif
1941
f9134319 1942#ifdef SDHCI_USE_LEDS_CLASS
5dbace0c
HS		 1943 snprintf(host->led_name, sizeof(host->led_name),
1944 "%s::", mmc_hostname(mmc));
1945 host->led.name = host->led_name;
2f730fec
PO		 1946 host->led.brightness = LED_OFF;
1947 host->led.default_trigger = mmc_hostname(mmc);
1948 host->led.brightness_set = sdhci_led_control;
1949
b8c86fc5 1950 ret = led_classdev_register(mmc_dev(mmc), &host->led);
2f730fec
PO		 1951 if (ret)
1952 goto reset;
1953#endif
1954
5f25a66f
PO		 1955 mmiowb();
1956
d129bceb
PO		 1957 mmc_add_host(mmc);
1958
a13abc7b 1959 printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s\n",
d1b26863 1960 mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
a13abc7b
RR		 1961 (host->flags & SDHCI_USE_ADMA) ? "ADMA" :
1962 (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
d129bceb 1963
7260cf5e
AV		 1964 sdhci_enable_card_detection(host);
1965
d129bceb
PO		 1966 return 0;
1967
f9134319 1968#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 1969reset:
1970 sdhci_reset(host, SDHCI_RESET_ALL);
1971 free_irq(host->irq, host);
1972#endif
8ef1a143 1973untasklet:
d129bceb
PO		 1974 tasklet_kill(&host->card_tasklet);
1975 tasklet_kill(&host->finish_tasklet);
d129bceb
PO		 1976
1977 return ret;
1978}
1979
b8c86fc5 1980EXPORT_SYMBOL_GPL(sdhci_add_host);
d129bceb 1981
1e72859e 1982void sdhci_remove_host(struct sdhci_host *host, int dead)
b8c86fc5 1983{
1e72859e
PO		 1984 unsigned long flags;
1985
1986 if (dead) {
1987 spin_lock_irqsave(&host->lock, flags);
1988
1989 host->flags |= SDHCI_DEVICE_DEAD;
1990
1991 if (host->mrq) {
1992 printk(KERN_ERR "%s: Controller removed during "
1993 " transfer!\n", mmc_hostname(host->mmc));
1994
1995 host->mrq->cmd->error = -ENOMEDIUM;
1996 tasklet_schedule(&host->finish_tasklet);
1997 }
1998
1999 spin_unlock_irqrestore(&host->lock, flags);
2000 }
2001
7260cf5e
AV		 2002 sdhci_disable_card_detection(host);
2003
b8c86fc5 2004 mmc_remove_host(host->mmc);
d129bceb 2005
f9134319 2006#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 2007 led_classdev_unregister(&host->led);
2008#endif
2009
1e72859e
PO		 2010 if (!dead)
2011 sdhci_reset(host, SDHCI_RESET_ALL);
d129bceb
PO		 2012
2013 free_irq(host->irq, host);
2014
2015 del_timer_sync(&host->timer);
2016
2017 tasklet_kill(&host->card_tasklet);
2018 tasklet_kill(&host->finish_tasklet);
2134a922 2019
9bea3c85
MS		 2020 if (host->vmmc) {
2021 regulator_disable(host->vmmc);
2022 regulator_put(host->vmmc);
2023 }
2024
2134a922
PO		 2025 kfree(host->adma_desc);
2026 kfree(host->align_buffer);
2027
2028 host->adma_desc = NULL;
2029 host->align_buffer = NULL;
d129bceb
PO		 2030}
2031
b8c86fc5 2032EXPORT_SYMBOL_GPL(sdhci_remove_host);
d129bceb 2033
b8c86fc5 2034void sdhci_free_host(struct sdhci_host *host)
d129bceb 2035{
b8c86fc5 2036 mmc_free_host(host->mmc);
d129bceb
PO		 2037}
2038
b8c86fc5 2039EXPORT_SYMBOL_GPL(sdhci_free_host);
d129bceb
PO		 2040
2041/*****************************************************************************\
2042 * *
2043 * Driver init/exit *
2044 * *
2045\*****************************************************************************/
2046
2047static int __init sdhci_drv_init(void)
2048{
2049 printk(KERN_INFO DRIVER_NAME
52fbf9c9 2050 ": Secure Digital Host Controller Interface driver\n");
d129bceb
PO		 2051 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
2052
b8c86fc5 2053 return 0;
d129bceb
PO		 2054}
2055
2056static void __exit sdhci_drv_exit(void)
2057{
d129bceb
PO		 2058}
2059
2060module_init(sdhci_drv_init);
2061module_exit(sdhci_drv_exit);
2062
df673b22 2063module_param(debug_quirks, uint, 0444);
67435274 2064
32710e8f 2065MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
b8c86fc5 2066MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
d129bceb 2067MODULE_LICENSE("GPL");
67435274 2068
df673b22 2069MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
Linux 6.x block layer and io_uring tree(s)