projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: sdhci: add a voltage switch callback function
[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>
88b47679 19#include <linux/module.h>
d129bceb 20#include <linux/dma-mapping.h>
5a0e3ad6 21#include <linux/slab.h>
11763609 22#include <linux/scatterlist.h>
9bea3c85 23#include <linux/regulator/consumer.h>
66fd8ad5 24#include <linux/pm_runtime.h>
d129bceb 25
2f730fec
PO		 26#include <linux/leds.h>
27
22113efd 28#include <linux/mmc/mmc.h>
d129bceb 29#include <linux/mmc/host.h>
473b095a 30#include <linux/mmc/card.h>
bec9d4e5 31#include <linux/mmc/slot-gpio.h>
d129bceb 32
d129bceb
PO		 33#include "sdhci.h"
34
35#define DRIVER_NAME "sdhci"
d129bceb 36
d129bceb 37#define DBG(f, x...) \
c6563178 38 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
d129bceb 39
f9134319
PO		 40#if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
41 defined(CONFIG_MMC_SDHCI_MODULE))
42#define SDHCI_USE_LEDS_CLASS
43#endif
44
b513ea25
AN		 45#define MAX_TUNING_LOOP 40
46
df673b22 47static unsigned int debug_quirks = 0;
66fd8ad5 48static unsigned int debug_quirks2;
67435274 49
d129bceb
PO		 50static void sdhci_finish_data(struct sdhci_host *);
51
d129bceb 52static void sdhci_finish_command(struct sdhci_host *);
069c9f14 53static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
cf2b5eea 54static void sdhci_tuning_timer(unsigned long data);
52983382 55static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
348487cb
HC		 56static int sdhci_pre_dma_transfer(struct sdhci_host *host,
57 struct mmc_data *data,
58 struct sdhci_host_next *next);
d129bceb 59
162d6f98 60#ifdef CONFIG_PM
66fd8ad5
AH		 61static int sdhci_runtime_pm_get(struct sdhci_host *host);
62static int sdhci_runtime_pm_put(struct sdhci_host *host);
f0710a55
AH		 63static void sdhci_runtime_pm_bus_on(struct sdhci_host *host);
64static void sdhci_runtime_pm_bus_off(struct sdhci_host *host);
66fd8ad5
AH		 65#else
66static inline int sdhci_runtime_pm_get(struct sdhci_host *host)
67{
68 return 0;
69}
70static inline int sdhci_runtime_pm_put(struct sdhci_host *host)
71{
72 return 0;
73}
f0710a55
AH		 74static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
75{
76}
77static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
78{
79}
66fd8ad5
AH		 80#endif
81
d129bceb
PO		 82static void sdhci_dumpregs(struct sdhci_host *host)
83{
a3c76eb9 84 pr_debug(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n",
412ab659 85 mmc_hostname(host->mmc));
d129bceb 86
a3c76eb9 87 pr_debug(DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
4e4141a5
AV		 88 sdhci_readl(host, SDHCI_DMA_ADDRESS),
89 sdhci_readw(host, SDHCI_HOST_VERSION));
a3c76eb9 90 pr_debug(DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
4e4141a5
AV		 91 sdhci_readw(host, SDHCI_BLOCK_SIZE),
92 sdhci_readw(host, SDHCI_BLOCK_COUNT));
a3c76eb9 93 pr_debug(DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
4e4141a5
AV		 94 sdhci_readl(host, SDHCI_ARGUMENT),
95 sdhci_readw(host, SDHCI_TRANSFER_MODE));
a3c76eb9 96 pr_debug(DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
4e4141a5
AV		 97 sdhci_readl(host, SDHCI_PRESENT_STATE),
98 sdhci_readb(host, SDHCI_HOST_CONTROL));
a3c76eb9 99 pr_debug(DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
4e4141a5
AV		 100 sdhci_readb(host, SDHCI_POWER_CONTROL),
101 sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL));
a3c76eb9 102 pr_debug(DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
4e4141a5
AV		 103 sdhci_readb(host, SDHCI_WAKE_UP_CONTROL),
104 sdhci_readw(host, SDHCI_CLOCK_CONTROL));
a3c76eb9 105 pr_debug(DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
4e4141a5
AV		 106 sdhci_readb(host, SDHCI_TIMEOUT_CONTROL),
107 sdhci_readl(host, SDHCI_INT_STATUS));
a3c76eb9 108 pr_debug(DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
4e4141a5
AV		 109 sdhci_readl(host, SDHCI_INT_ENABLE),
110 sdhci_readl(host, SDHCI_SIGNAL_ENABLE));
a3c76eb9 111 pr_debug(DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
4e4141a5
AV		 112 sdhci_readw(host, SDHCI_ACMD12_ERR),
113 sdhci_readw(host, SDHCI_SLOT_INT_STATUS));
a3c76eb9 114 pr_debug(DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n",
4e4141a5 115 sdhci_readl(host, SDHCI_CAPABILITIES),
e8120ad1 116 sdhci_readl(host, SDHCI_CAPABILITIES_1));
a3c76eb9 117 pr_debug(DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n",
e8120ad1 118 sdhci_readw(host, SDHCI_COMMAND),
4e4141a5 119 sdhci_readl(host, SDHCI_MAX_CURRENT));
a3c76eb9 120 pr_debug(DRIVER_NAME ": Host ctl2: 0x%08x\n",
f2119df6 121 sdhci_readw(host, SDHCI_HOST_CONTROL2));
d129bceb 122
e57a5f61
AH		 123 if (host->flags & SDHCI_USE_ADMA) {
124 if (host->flags & SDHCI_USE_64_BIT_DMA)
125 pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x%08x\n",
126 readl(host->ioaddr + SDHCI_ADMA_ERROR),
127 readl(host->ioaddr + SDHCI_ADMA_ADDRESS_HI),
128 readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
129 else
130 pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
131 readl(host->ioaddr + SDHCI_ADMA_ERROR),
132 readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
133 }
be3f4ae0 134
a3c76eb9 135 pr_debug(DRIVER_NAME ": ===========================================\n");
d129bceb
PO		 136}
137
138/*****************************************************************************\
139 * *
140 * Low level functions *
141 * *
142\*****************************************************************************/
143
7260cf5e
AV		 144static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
145{
5b4f1f6c 146 u32 present;
7260cf5e 147
c79396c1 148 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
87b87a3f 149 (host->mmc->caps & MMC_CAP_NONREMOVABLE))
66fd8ad5
AH		 150 return;
151
5b4f1f6c
RK		 152 if (enable) {
153 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
154 SDHCI_CARD_PRESENT;
d25928d1 155
5b4f1f6c
RK		 156 host->ier |= present ? SDHCI_INT_CARD_REMOVE :
157 SDHCI_INT_CARD_INSERT;
158 } else {
159 host->ier &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
160 }
b537f94c
RK		 161
162 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
163 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
7260cf5e
AV		 164}
165
166static void sdhci_enable_card_detection(struct sdhci_host *host)
167{
168 sdhci_set_card_detection(host, true);
169}
170
171static void sdhci_disable_card_detection(struct sdhci_host *host)
172{
173 sdhci_set_card_detection(host, false);
174}
175
03231f9b 176void sdhci_reset(struct sdhci_host *host, u8 mask)
d129bceb 177{
e16514d8 178 unsigned long timeout;
393c1a34 179
4e4141a5 180 sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
d129bceb 181
f0710a55 182 if (mask & SDHCI_RESET_ALL) {
d129bceb 183 host->clock = 0;
f0710a55
AH		 184 /* Reset-all turns off SD Bus Power */
185 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
186 sdhci_runtime_pm_bus_off(host);
187 }
d129bceb 188
e16514d8
PO		 189 /* Wait max 100 ms */
190 timeout = 100;
191
192 /* hw clears the bit when it's done */
4e4141a5 193 while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
e16514d8 194 if (timeout == 0) {
a3c76eb9 195 pr_err("%s: Reset 0x%x never completed.\n",
e16514d8
PO		 196 mmc_hostname(host->mmc), (int)mask);
197 sdhci_dumpregs(host);
198 return;
199 }
200 timeout--;
201 mdelay(1);
d129bceb 202 }
03231f9b
RK		 203}
204EXPORT_SYMBOL_GPL(sdhci_reset);
205
206static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
207{
208 if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
209 if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) &
210 SDHCI_CARD_PRESENT))
211 return;
212 }
063a9dbb 213
03231f9b 214 host->ops->reset(host, mask);
393c1a34 215
da91a8f9
RK		 216 if (mask & SDHCI_RESET_ALL) {
217 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
218 if (host->ops->enable_dma)
219 host->ops->enable_dma(host);
220 }
221
222 /* Resetting the controller clears many */
223 host->preset_enabled = false;
3abc1e80 224 }
d129bceb
PO		 225}
226
2f4cbb3d
NP		 227static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
228
229static void sdhci_init(struct sdhci_host *host, int soft)
d129bceb 230{
2f4cbb3d 231 if (soft)
03231f9b 232 sdhci_do_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
2f4cbb3d 233 else
03231f9b 234 sdhci_do_reset(host, SDHCI_RESET_ALL);
d129bceb 235
b537f94c
RK		 236 host->ier = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
237 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT |
238 SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC |
239 SDHCI_INT_TIMEOUT | SDHCI_INT_DATA_END |
240 SDHCI_INT_RESPONSE;
241
242 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
243 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
2f4cbb3d
NP		 244
245 if (soft) {
246 /* force clock reconfiguration */
247 host->clock = 0;
248 sdhci_set_ios(host->mmc, &host->mmc->ios);
249 }
7260cf5e 250}
d129bceb 251
7260cf5e
AV		 252static void sdhci_reinit(struct sdhci_host *host)
253{
2f4cbb3d 254 sdhci_init(host, 0);
b67c6b41
AL		 255 /*
256 * Retuning stuffs are affected by different cards inserted and only
257 * applicable to UHS-I cards. So reset these fields to their initial
258 * value when card is removed.
259 */
973905fe
AL		 260 if (host->flags & SDHCI_USING_RETUNING_TIMER) {
261 host->flags &= ~SDHCI_USING_RETUNING_TIMER;
262
b67c6b41
AL		 263 del_timer_sync(&host->tuning_timer);
264 host->flags &= ~SDHCI_NEEDS_RETUNING;
b67c6b41 265 }
7260cf5e 266 sdhci_enable_card_detection(host);
d129bceb
PO		 267}
268
269static void sdhci_activate_led(struct sdhci_host *host)
270{
271 u8 ctrl;
272
4e4141a5 273 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 274 ctrl |= SDHCI_CTRL_LED;
4e4141a5 275 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 276}
277
278static void sdhci_deactivate_led(struct sdhci_host *host)
279{
280 u8 ctrl;
281
4e4141a5 282 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 283 ctrl &= ~SDHCI_CTRL_LED;
4e4141a5 284 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 285}
286
f9134319 287#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 288static void sdhci_led_control(struct led_classdev *led,
289 enum led_brightness brightness)
290{
291 struct sdhci_host *host = container_of(led, struct sdhci_host, led);
292 unsigned long flags;
293
294 spin_lock_irqsave(&host->lock, flags);
295
66fd8ad5
AH		 296 if (host->runtime_suspended)
297 goto out;
298
2f730fec
PO		 299 if (brightness == LED_OFF)
300 sdhci_deactivate_led(host);
301 else
302 sdhci_activate_led(host);
66fd8ad5 303out:
2f730fec
PO		 304 spin_unlock_irqrestore(&host->lock, flags);
305}
306#endif
307
d129bceb
PO		 308/*****************************************************************************\
309 * *
310 * Core functions *
311 * *
312\*****************************************************************************/
313
a406f5a3 314static void sdhci_read_block_pio(struct sdhci_host *host)
d129bceb 315{
7659150c
PO		 316 unsigned long flags;
317 size_t blksize, len, chunk;
7244b85b 318 u32 uninitialized_var(scratch);
7659150c 319 u8 *buf;
d129bceb 320
a406f5a3 321 DBG("PIO reading\n");
d129bceb 322
a406f5a3 323 blksize = host->data->blksz;
7659150c 324 chunk = 0;
d129bceb 325
7659150c 326 local_irq_save(flags);
d129bceb 327
a406f5a3 328 while (blksize) {
7659150c
PO		 329 if (!sg_miter_next(&host->sg_miter))
330 BUG();
d129bceb 331
7659150c 332 len = min(host->sg_miter.length, blksize);
d129bceb 333
7659150c
PO		 334 blksize -= len;
335 host->sg_miter.consumed = len;
14d836e7 336
7659150c 337 buf = host->sg_miter.addr;
d129bceb 338
7659150c
PO		 339 while (len) {
340 if (chunk == 0) {
4e4141a5 341 scratch = sdhci_readl(host, SDHCI_BUFFER);
7659150c 342 chunk = 4;
a406f5a3 343 }
7659150c
PO		 344
345 *buf = scratch & 0xFF;
346
347 buf++;
348 scratch >>= 8;
349 chunk--;
350 len--;
d129bceb 351 }
a406f5a3 352 }
7659150c
PO		 353
354 sg_miter_stop(&host->sg_miter);
355
356 local_irq_restore(flags);
a406f5a3 357}
d129bceb 358
a406f5a3
PO		 359static void sdhci_write_block_pio(struct sdhci_host *host)
360{
7659150c
PO		 361 unsigned long flags;
362 size_t blksize, len, chunk;
363 u32 scratch;
364 u8 *buf;
d129bceb 365
a406f5a3
PO		 366 DBG("PIO writing\n");
367
368 blksize = host->data->blksz;
7659150c
PO		 369 chunk = 0;
370 scratch = 0;
d129bceb 371
7659150c 372 local_irq_save(flags);
d129bceb 373
a406f5a3 374 while (blksize) {
7659150c
PO		 375 if (!sg_miter_next(&host->sg_miter))
376 BUG();
a406f5a3 377
7659150c
PO		 378 len = min(host->sg_miter.length, blksize);
379
380 blksize -= len;
381 host->sg_miter.consumed = len;
382
383 buf = host->sg_miter.addr;
d129bceb 384
7659150c
PO		 385 while (len) {
386 scratch |= (u32)*buf << (chunk * 8);
387
388 buf++;
389 chunk++;
390 len--;
391
392 if ((chunk == 4) || ((len == 0) && (blksize == 0))) {
4e4141a5 393 sdhci_writel(host, scratch, SDHCI_BUFFER);
7659150c
PO		 394 chunk = 0;
395 scratch = 0;
d129bceb 396 }
d129bceb
PO		 397 }
398 }
7659150c
PO		 399
400 sg_miter_stop(&host->sg_miter);
401
402 local_irq_restore(flags);
a406f5a3
PO		 403}
404
405static void sdhci_transfer_pio(struct sdhci_host *host)
406{
407 u32 mask;
408
409 BUG_ON(!host->data);
410
7659150c 411 if (host->blocks == 0)
a406f5a3
PO		 412 return;
413
414 if (host->data->flags & MMC_DATA_READ)
415 mask = SDHCI_DATA_AVAILABLE;
416 else
417 mask = SDHCI_SPACE_AVAILABLE;
418
4a3cba32
PO		 419 /*
420 * Some controllers (JMicron JMB38x) mess up the buffer bits
421 * for transfers < 4 bytes. As long as it is just one block,
422 * we can ignore the bits.
423 */
424 if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) &&
425 (host->data->blocks == 1))
426 mask = ~0;
427
4e4141a5 428 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
3e3bf207
AV		 429 if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY)
430 udelay(100);
431
a406f5a3
PO		 432 if (host->data->flags & MMC_DATA_READ)
433 sdhci_read_block_pio(host);
434 else
435 sdhci_write_block_pio(host);
d129bceb 436
7659150c
PO		 437 host->blocks--;
438 if (host->blocks == 0)
a406f5a3 439 break;
a406f5a3 440 }
d129bceb 441
a406f5a3 442 DBG("PIO transfer complete.\n");
d129bceb
PO		 443}
444
2134a922
PO		 445static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
446{
447 local_irq_save(*flags);
482fce99 448 return kmap_atomic(sg_page(sg)) + sg->offset;
2134a922
PO		 449}
450
451static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
452{
482fce99 453 kunmap_atomic(buffer);
2134a922
PO		 454 local_irq_restore(*flags);
455}
456
e57a5f61
AH		 457static void sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
458 dma_addr_t addr, int len, unsigned cmd)
118cd17d 459{
e57a5f61 460 struct sdhci_adma2_64_desc *dma_desc = desc;
118cd17d 461
e57a5f61 462 /* 32-bit and 64-bit descriptors have these members in same position */
0545230f
AH		 463 dma_desc->cmd = cpu_to_le16(cmd);
464 dma_desc->len = cpu_to_le16(len);
e57a5f61
AH		 465 dma_desc->addr_lo = cpu_to_le32((u32)addr);
466
467 if (host->flags & SDHCI_USE_64_BIT_DMA)
468 dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32);
118cd17d
BD		 469}
470
b5ffa674
AH		 471static void sdhci_adma_mark_end(void *desc)
472{
e57a5f61 473 struct sdhci_adma2_64_desc *dma_desc = desc;
b5ffa674 474
e57a5f61 475 /* 32-bit and 64-bit descriptors have 'cmd' in same position */
0545230f 476 dma_desc->cmd |= cpu_to_le16(ADMA2_END);
b5ffa674
AH		 477}
478
8f1934ce 479static int sdhci_adma_table_pre(struct sdhci_host *host,
2134a922
PO		 480 struct mmc_data *data)
481{
482 int direction;
483
1c3d5f6d
AH		 484 void *desc;
485 void *align;
2134a922
PO		 486 dma_addr_t addr;
487 dma_addr_t align_addr;
488 int len, offset;
489
490 struct scatterlist *sg;
491 int i;
492 char *buffer;
493 unsigned long flags;
494
495 /*
496 * The spec does not specify endianness of descriptor table.
497 * We currently guess that it is LE.
498 */
499
500 if (data->flags & MMC_DATA_READ)
501 direction = DMA_FROM_DEVICE;
502 else
503 direction = DMA_TO_DEVICE;
504
2134a922 505 host->align_addr = dma_map_single(mmc_dev(host->mmc),
76fe379a 506 host->align_buffer, host->align_buffer_sz, direction);
8d8bb39b 507 if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr))
8f1934ce 508 goto fail;
76fe379a 509 BUG_ON(host->align_addr & host->align_mask);
2134a922 510
348487cb
HC		 511 host->sg_count = sdhci_pre_dma_transfer(host, data, NULL);
512 if (host->sg_count < 0)
8f1934ce 513 goto unmap_align;
2134a922 514
4efaa6fb 515 desc = host->adma_table;
2134a922
PO		 516 align = host->align_buffer;
517
518 align_addr = host->align_addr;
519
520 for_each_sg(data->sg, sg, host->sg_count, i) {
521 addr = sg_dma_address(sg);
522 len = sg_dma_len(sg);
523
524 /*
525 * The SDHCI specification states that ADMA
526 * addresses must be 32-bit aligned. If they
527 * aren't, then we use a bounce buffer for
528 * the (up to three) bytes that screw up the
529 * alignment.
530 */
76fe379a
AH		 531 offset = (host->align_sz - (addr & host->align_mask)) &
532 host->align_mask;
2134a922
PO		 533 if (offset) {
534 if (data->flags & MMC_DATA_WRITE) {
535 buffer = sdhci_kmap_atomic(sg, &flags);
536 memcpy(align, buffer, offset);
537 sdhci_kunmap_atomic(buffer, &flags);
538 }
539
118cd17d 540 /* tran, valid */
e57a5f61 541 sdhci_adma_write_desc(host, desc, align_addr, offset,
739d46dc 542 ADMA2_TRAN_VALID);
2134a922
PO		 543
544 BUG_ON(offset > 65536);
545
76fe379a
AH		 546 align += host->align_sz;
547 align_addr += host->align_sz;
2134a922 548
76fe379a 549 desc += host->desc_sz;
2134a922
PO		 550
551 addr += offset;
552 len -= offset;
553 }
554
2134a922
PO		 555 BUG_ON(len > 65536);
556
118cd17d 557 /* tran, valid */
e57a5f61 558 sdhci_adma_write_desc(host, desc, addr, len, ADMA2_TRAN_VALID);
76fe379a 559 desc += host->desc_sz;
2134a922
PO		 560
561 /*
562 * If this triggers then we have a calculation bug
563 * somewhere. :/
564 */
76fe379a 565 WARN_ON((desc - host->adma_table) >= host->adma_table_sz);
2134a922
PO		 566 }
567
70764a90
TA		 568 if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) {
569 /*
570 * Mark the last descriptor as the terminating descriptor
571 */
4efaa6fb 572 if (desc != host->adma_table) {
76fe379a 573 desc -= host->desc_sz;
b5ffa674 574 sdhci_adma_mark_end(desc);
70764a90
TA		 575 }
576 } else {
577 /*
578 * Add a terminating entry.
579 */
2134a922 580
70764a90 581 /* nop, end, valid */
e57a5f61 582 sdhci_adma_write_desc(host, desc, 0, 0, ADMA2_NOP_END_VALID);
70764a90 583 }
2134a922
PO		 584
585 /*
586 * Resync align buffer as we might have changed it.
587 */
588 if (data->flags & MMC_DATA_WRITE) {
589 dma_sync_single_for_device(mmc_dev(host->mmc),
76fe379a 590 host->align_addr, host->align_buffer_sz, direction);
2134a922
PO		 591 }
592
8f1934ce
PO		 593 return 0;
594
8f1934ce
PO		 595unmap_align:
596 dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
76fe379a 597 host->align_buffer_sz, direction);
8f1934ce
PO		 598fail:
599 return -EINVAL;
2134a922
PO		 600}
601
602static void sdhci_adma_table_post(struct sdhci_host *host,
603 struct mmc_data *data)
604{
605 int direction;
606
607 struct scatterlist *sg;
608 int i, size;
1c3d5f6d 609 void *align;
2134a922
PO		 610 char *buffer;
611 unsigned long flags;
de0b65a7 612 bool has_unaligned;
2134a922
PO		 613
614 if (data->flags & MMC_DATA_READ)
615 direction = DMA_FROM_DEVICE;
616 else
617 direction = DMA_TO_DEVICE;
618
2134a922 619 dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
76fe379a 620 host->align_buffer_sz, direction);
2134a922 621
de0b65a7
RK		 622 /* Do a quick scan of the SG list for any unaligned mappings */
623 has_unaligned = false;
624 for_each_sg(data->sg, sg, host->sg_count, i)
76fe379a 625 if (sg_dma_address(sg) & host->align_mask) {
de0b65a7
RK		 626 has_unaligned = true;
627 break;
628 }
629
630 if (has_unaligned && data->flags & MMC_DATA_READ) {
2134a922
PO		 631 dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg,
632 data->sg_len, direction);
633
634 align = host->align_buffer;
635
636 for_each_sg(data->sg, sg, host->sg_count, i) {
76fe379a
AH		 637 if (sg_dma_address(sg) & host->align_mask) {
638 size = host->align_sz -
639 (sg_dma_address(sg) & host->align_mask);
2134a922
PO		 640
641 buffer = sdhci_kmap_atomic(sg, &flags);
642 memcpy(buffer, align, size);
643 sdhci_kunmap_atomic(buffer, &flags);
644
76fe379a 645 align += host->align_sz;
2134a922
PO		 646 }
647 }
648 }
649
348487cb
HC		 650 if (!data->host_cookie)
651 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
652 data->sg_len, direction);
2134a922
PO		 653}
654
a3c7778f 655static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
d129bceb 656{
1c8cde92 657 u8 count;
a3c7778f 658 struct mmc_data *data = cmd->data;
1c8cde92 659 unsigned target_timeout, current_timeout;
d129bceb 660
ee53ab5d
PO		 661 /*
662 * If the host controller provides us with an incorrect timeout
663 * value, just skip the check and use 0xE. The hardware may take
664 * longer to time out, but that's much better than having a too-short
665 * timeout value.
666 */
11a2f1b7 667 if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)
ee53ab5d 668 return 0xE;
e538fbe8 669
a3c7778f 670 /* Unspecified timeout, assume max */
1d4d7744 671 if (!data && !cmd->busy_timeout)
a3c7778f 672 return 0xE;
d129bceb 673
a3c7778f
AW		 674 /* timeout in us */
675 if (!data)
1d4d7744 676 target_timeout = cmd->busy_timeout * 1000;
78a2ca27
AS		 677 else {
678 target_timeout = data->timeout_ns / 1000;
679 if (host->clock)
680 target_timeout += data->timeout_clks / host->clock;
681 }
81b39802 682
1c8cde92
PO		 683 /*
684 * Figure out needed cycles.
685 * We do this in steps in order to fit inside a 32 bit int.
686 * The first step is the minimum timeout, which will have a
687 * minimum resolution of 6 bits:
688 * (1) 2^13*1000 > 2^22,
689 * (2) host->timeout_clk < 2^16
690 * =>
691 * (1) / (2) > 2^6
692 */
693 count = 0;
694 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
695 while (current_timeout < target_timeout) {
696 count++;
697 current_timeout <<= 1;
698 if (count >= 0xF)
699 break;
700 }
701
702 if (count >= 0xF) {
09eeff52
CB		 703 DBG("%s: Too large timeout 0x%x requested for CMD%d!\n",
704 mmc_hostname(host->mmc), count, cmd->opcode);
1c8cde92
PO		 705 count = 0xE;
706 }
707
ee53ab5d
PO		 708 return count;
709}
710
6aa943ab
AV		 711static void sdhci_set_transfer_irqs(struct sdhci_host *host)
712{
713 u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL;
714 u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR;
715
716 if (host->flags & SDHCI_REQ_USE_DMA)
b537f94c 717 host->ier = (host->ier & ~pio_irqs) | dma_irqs;
6aa943ab 718 else
b537f94c
RK		 719 host->ier = (host->ier & ~dma_irqs) | pio_irqs;
720
721 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
722 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
6aa943ab
AV		 723}
724
b45e668a 725static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
ee53ab5d
PO		 726{
727 u8 count;
b45e668a
AD		 728
729 if (host->ops->set_timeout) {
730 host->ops->set_timeout(host, cmd);
731 } else {
732 count = sdhci_calc_timeout(host, cmd);
733 sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
734 }
735}
736
737static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
738{
2134a922 739 u8 ctrl;
a3c7778f 740 struct mmc_data *data = cmd->data;
8f1934ce 741 int ret;
ee53ab5d
PO		 742
743 WARN_ON(host->data);
744
b45e668a
AD		 745 if (data || (cmd->flags & MMC_RSP_BUSY))
746 sdhci_set_timeout(host, cmd);
a3c7778f
AW		 747
748 if (!data)
ee53ab5d
PO		 749 return;
750
751 /* Sanity checks */
752 BUG_ON(data->blksz * data->blocks > 524288);
753 BUG_ON(data->blksz > host->mmc->max_blk_size);
754 BUG_ON(data->blocks > 65535);
755
756 host->data = data;
757 host->data_early = 0;
f6a03cbf 758 host->data->bytes_xfered = 0;
ee53ab5d 759
a13abc7b 760 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))
c9fddbc4
PO		 761 host->flags |= SDHCI_REQ_USE_DMA;
762
2134a922
PO		 763 /*
764 * FIXME: This doesn't account for merging when mapping the
765 * scatterlist.
766 */
767 if (host->flags & SDHCI_REQ_USE_DMA) {
768 int broken, i;
769 struct scatterlist *sg;
770
771 broken = 0;
772 if (host->flags & SDHCI_USE_ADMA) {
773 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
774 broken = 1;
775 } else {
776 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
777 broken = 1;
778 }
779
780 if (unlikely(broken)) {
781 for_each_sg(data->sg, sg, data->sg_len, i) {
782 if (sg->length & 0x3) {
783 DBG("Reverting to PIO because of "
784 "transfer size (%d)\n",
785 sg->length);
786 host->flags &= ~SDHCI_REQ_USE_DMA;
787 break;
788 }
789 }
790 }
c9fddbc4
PO		 791 }
792
793 /*
794 * The assumption here being that alignment is the same after
795 * translation to device address space.
796 */
2134a922
PO		 797 if (host->flags & SDHCI_REQ_USE_DMA) {
798 int broken, i;
799 struct scatterlist *sg;
800
801 broken = 0;
802 if (host->flags & SDHCI_USE_ADMA) {
803 /*
804 * As we use 3 byte chunks to work around
805 * alignment problems, we need to check this
806 * quirk.
807 */
808 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
809 broken = 1;
810 } else {
811 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
812 broken = 1;
813 }
814
815 if (unlikely(broken)) {
816 for_each_sg(data->sg, sg, data->sg_len, i) {
817 if (sg->offset & 0x3) {
818 DBG("Reverting to PIO because of "
819 "bad alignment\n");
820 host->flags &= ~SDHCI_REQ_USE_DMA;
821 break;
822 }
823 }
824 }
825 }
826
8f1934ce
PO		 827 if (host->flags & SDHCI_REQ_USE_DMA) {
828 if (host->flags & SDHCI_USE_ADMA) {
829 ret = sdhci_adma_table_pre(host, data);
830 if (ret) {
831 /*
832 * This only happens when someone fed
833 * us an invalid request.
834 */
835 WARN_ON(1);
ebd6d357 836 host->flags &= ~SDHCI_REQ_USE_DMA;
8f1934ce 837 } else {
4e4141a5
AV		 838 sdhci_writel(host, host->adma_addr,
839 SDHCI_ADMA_ADDRESS);
e57a5f61
AH		 840 if (host->flags & SDHCI_USE_64_BIT_DMA)
841 sdhci_writel(host,
842 (u64)host->adma_addr >> 32,
843 SDHCI_ADMA_ADDRESS_HI);
8f1934ce
PO		 844 }
845 } else {
c8b3e02e 846 int sg_cnt;
8f1934ce 847
348487cb 848 sg_cnt = sdhci_pre_dma_transfer(host, data, NULL);
c8b3e02e 849 if (sg_cnt == 0) {
8f1934ce
PO		 850 /*
851 * This only happens when someone fed
852 * us an invalid request.
853 */
854 WARN_ON(1);
ebd6d357 855 host->flags &= ~SDHCI_REQ_USE_DMA;
8f1934ce 856 } else {
719a61b4 857 WARN_ON(sg_cnt != 1);
4e4141a5
AV		 858 sdhci_writel(host, sg_dma_address(data->sg),
859 SDHCI_DMA_ADDRESS);
8f1934ce
PO		 860 }
861 }
862 }
863
2134a922
PO		 864 /*
865 * Always adjust the DMA selection as some controllers
866 * (e.g. JMicron) can't do PIO properly when the selection
867 * is ADMA.
868 */
869 if (host->version >= SDHCI_SPEC_200) {
4e4141a5 870 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
2134a922
PO		 871 ctrl &= ~SDHCI_CTRL_DMA_MASK;
872 if ((host->flags & SDHCI_REQ_USE_DMA) &&
e57a5f61
AH		 873 (host->flags & SDHCI_USE_ADMA)) {
874 if (host->flags & SDHCI_USE_64_BIT_DMA)
875 ctrl |= SDHCI_CTRL_ADMA64;
876 else
877 ctrl |= SDHCI_CTRL_ADMA32;
878 } else {
2134a922 879 ctrl |= SDHCI_CTRL_SDMA;
e57a5f61 880 }
4e4141a5 881 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
c9fddbc4
PO		 882 }
883
8f1934ce 884 if (!(host->flags & SDHCI_REQ_USE_DMA)) {
da60a91d
SAS		 885 int flags;
886
887 flags = SG_MITER_ATOMIC;
888 if (host->data->flags & MMC_DATA_READ)
889 flags |= SG_MITER_TO_SG;
890 else
891 flags |= SG_MITER_FROM_SG;
892 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
7659150c 893 host->blocks = data->blocks;
d129bceb 894 }
c7fa9963 895
6aa943ab
AV		 896 sdhci_set_transfer_irqs(host);
897
f6a03cbf
MV		 898 /* Set the DMA boundary value and block size */
899 sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
900 data->blksz), SDHCI_BLOCK_SIZE);
4e4141a5 901 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
c7fa9963
PO		 902}
903
904static void sdhci_set_transfer_mode(struct sdhci_host *host,
e89d456f 905 struct mmc_command *cmd)
c7fa9963
PO		 906{
907 u16 mode;
e89d456f 908 struct mmc_data *data = cmd->data;
c7fa9963 909
2b558c13 910 if (data == NULL) {
9b8ffea6
VW		 911 if (host->quirks2 &
912 SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD) {
913 sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
914 } else {
2b558c13 915 /* clear Auto CMD settings for no data CMDs */
9b8ffea6
VW		 916 mode = sdhci_readw(host, SDHCI_TRANSFER_MODE);
917 sdhci_writew(host, mode & ~(SDHCI_TRNS_AUTO_CMD12 |
2b558c13 918 SDHCI_TRNS_AUTO_CMD23), SDHCI_TRANSFER_MODE);
9b8ffea6 919 }
c7fa9963 920 return;
2b558c13 921 }
c7fa9963 922
e538fbe8
PO		 923 WARN_ON(!host->data);
924
c7fa9963 925 mode = SDHCI_TRNS_BLK_CNT_EN;
e89d456f
AW		 926 if (mmc_op_multi(cmd->opcode) || data->blocks > 1) {
927 mode |= SDHCI_TRNS_MULTI;
928 /*
929 * If we are sending CMD23, CMD12 never gets sent
930 * on successful completion (so no Auto-CMD12).
931 */
932 if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12))
933 mode |= SDHCI_TRNS_AUTO_CMD12;
8edf6371
AW		 934 else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
935 mode |= SDHCI_TRNS_AUTO_CMD23;
936 sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2);
937 }
c4512f79 938 }
8edf6371 939
c7fa9963
PO		 940 if (data->flags & MMC_DATA_READ)
941 mode |= SDHCI_TRNS_READ;
c9fddbc4 942 if (host->flags & SDHCI_REQ_USE_DMA)
c7fa9963
PO		 943 mode |= SDHCI_TRNS_DMA;
944
4e4141a5 945 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
d129bceb
PO		 946}
947
948static void sdhci_finish_data(struct sdhci_host *host)
949{
950 struct mmc_data *data;
d129bceb
PO		 951
952 BUG_ON(!host->data);
953
954 data = host->data;
955 host->data = NULL;
956
c9fddbc4 957 if (host->flags & SDHCI_REQ_USE_DMA) {
2134a922
PO		 958 if (host->flags & SDHCI_USE_ADMA)
959 sdhci_adma_table_post(host, data);
960 else {
348487cb
HC		 961 if (!data->host_cookie)
962 dma_unmap_sg(mmc_dev(host->mmc),
963 data->sg, data->sg_len,
964 (data->flags & MMC_DATA_READ) ?
2134a922
PO		 965 DMA_FROM_DEVICE : DMA_TO_DEVICE);
966 }
d129bceb
PO		 967 }
968
969 /*
c9b74c5b
PO		 970 * The specification states that the block count register must
971 * be updated, but it does not specify at what point in the
972 * data flow. That makes the register entirely useless to read
973 * back so we have to assume that nothing made it to the card
974 * in the event of an error.
d129bceb 975 */
c9b74c5b
PO		 976 if (data->error)
977 data->bytes_xfered = 0;
d129bceb 978 else
c9b74c5b 979 data->bytes_xfered = data->blksz * data->blocks;
d129bceb 980
e89d456f
AW		 981 /*
982 * Need to send CMD12 if -
983 * a) open-ended multiblock transfer (no CMD23)
984 * b) error in multiblock transfer
985 */
986 if (data->stop &&
987 (data->error ||
988 !host->mrq->sbc)) {
989
d129bceb
PO		 990 /*
991 * The controller needs a reset of internal state machines
992 * upon error conditions.
993 */
17b0429d 994 if (data->error) {
03231f9b
RK		 995 sdhci_do_reset(host, SDHCI_RESET_CMD);
996 sdhci_do_reset(host, SDHCI_RESET_DATA);
d129bceb
PO		 997 }
998
999 sdhci_send_command(host, data->stop);
1000 } else
1001 tasklet_schedule(&host->finish_tasklet);
1002}
1003
c0e55129 1004void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
d129bceb
PO		 1005{
1006 int flags;
fd2208d7 1007 u32 mask;
7cb2c76f 1008 unsigned long timeout;
d129bceb
PO		 1009
1010 WARN_ON(host->cmd);
1011
d129bceb 1012 /* Wait max 10 ms */
7cb2c76f 1013 timeout = 10;
fd2208d7
PO		 1014
1015 mask = SDHCI_CMD_INHIBIT;
1016 if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
1017 mask |= SDHCI_DATA_INHIBIT;
1018
1019 /* We shouldn't wait for data inihibit for stop commands, even
1020 though they might use busy signaling */
1021 if (host->mrq->data && (cmd == host->mrq->data->stop))
1022 mask &= ~SDHCI_DATA_INHIBIT;
1023
4e4141a5 1024 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
7cb2c76f 1025 if (timeout == 0) {
a3c76eb9 1026 pr_err("%s: Controller never released "
acf1da45 1027 "inhibit bit(s).\n", mmc_hostname(host->mmc));
d129bceb 1028 sdhci_dumpregs(host);
17b0429d 1029 cmd->error = -EIO;
d129bceb
PO		 1030 tasklet_schedule(&host->finish_tasklet);
1031 return;
1032 }
7cb2c76f
PO		 1033 timeout--;
1034 mdelay(1);
1035 }
d129bceb 1036
3e1a6892 1037 timeout = jiffies;
1d4d7744
UH		 1038 if (!cmd->data && cmd->busy_timeout > 9000)
1039 timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ;
3e1a6892
AH		 1040 else
1041 timeout += 10 * HZ;
1042 mod_timer(&host->timer, timeout);
d129bceb
PO		 1043
1044 host->cmd = cmd;
e99783a4 1045 host->busy_handle = 0;
d129bceb 1046
a3c7778f 1047 sdhci_prepare_data(host, cmd);
d129bceb 1048
4e4141a5 1049 sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT);
d129bceb 1050
e89d456f 1051 sdhci_set_transfer_mode(host, cmd);
c7fa9963 1052
d129bceb 1053 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
a3c76eb9 1054 pr_err("%s: Unsupported response type!\n",
d129bceb 1055 mmc_hostname(host->mmc));
17b0429d 1056 cmd->error = -EINVAL;
d129bceb
PO		 1057 tasklet_schedule(&host->finish_tasklet);
1058 return;
1059 }
1060
1061 if (!(cmd->flags & MMC_RSP_PRESENT))
1062 flags = SDHCI_CMD_RESP_NONE;
1063 else if (cmd->flags & MMC_RSP_136)
1064 flags = SDHCI_CMD_RESP_LONG;
1065 else if (cmd->flags & MMC_RSP_BUSY)
1066 flags = SDHCI_CMD_RESP_SHORT_BUSY;
1067 else
1068 flags = SDHCI_CMD_RESP_SHORT;
1069
1070 if (cmd->flags & MMC_RSP_CRC)
1071 flags |= SDHCI_CMD_CRC;
1072 if (cmd->flags & MMC_RSP_OPCODE)
1073 flags |= SDHCI_CMD_INDEX;
b513ea25
AN		 1074
1075 /* CMD19 is special in that the Data Present Select should be set */
069c9f14
G		 1076 if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1077 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200)
d129bceb
PO		 1078 flags |= SDHCI_CMD_DATA;
1079
4e4141a5 1080 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
d129bceb 1081}
c0e55129 1082EXPORT_SYMBOL_GPL(sdhci_send_command);
d129bceb
PO		 1083
1084static void sdhci_finish_command(struct sdhci_host *host)
1085{
1086 int i;
1087
1088 BUG_ON(host->cmd == NULL);
1089
1090 if (host->cmd->flags & MMC_RSP_PRESENT) {
1091 if (host->cmd->flags & MMC_RSP_136) {
1092 /* CRC is stripped so we need to do some shifting. */
1093 for (i = 0;i < 4;i++) {
4e4141a5 1094 host->cmd->resp[i] = sdhci_readl(host,
d129bceb
PO		 1095 SDHCI_RESPONSE + (3-i)*4) << 8;
1096 if (i != 3)
1097 host->cmd->resp[i] |=
4e4141a5 1098 sdhci_readb(host,
d129bceb
PO		 1099 SDHCI_RESPONSE + (3-i)*4-1);
1100 }
1101 } else {
4e4141a5 1102 host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE);
d129bceb
PO		 1103 }
1104 }
1105
17b0429d 1106 host->cmd->error = 0;
d129bceb 1107
e89d456f
AW		 1108 /* Finished CMD23, now send actual command. */
1109 if (host->cmd == host->mrq->sbc) {
1110 host->cmd = NULL;
1111 sdhci_send_command(host, host->mrq->cmd);
1112 } else {
e538fbe8 1113
e89d456f
AW		 1114 /* Processed actual command. */
1115 if (host->data && host->data_early)
1116 sdhci_finish_data(host);
d129bceb 1117
e89d456f
AW		 1118 if (!host->cmd->data)
1119 tasklet_schedule(&host->finish_tasklet);
1120
1121 host->cmd = NULL;
1122 }
d129bceb
PO		 1123}
1124
52983382
KL		 1125static u16 sdhci_get_preset_value(struct sdhci_host *host)
1126{
d975f121 1127 u16 preset = 0;
52983382 1128
d975f121
RK		 1129 switch (host->timing) {
1130 case MMC_TIMING_UHS_SDR12:
52983382
KL		 1131 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
1132 break;
d975f121 1133 case MMC_TIMING_UHS_SDR25:
52983382
KL		 1134 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR25);
1135 break;
d975f121 1136 case MMC_TIMING_UHS_SDR50:
52983382
KL		 1137 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR50);
1138 break;
d975f121
RK		 1139 case MMC_TIMING_UHS_SDR104:
1140 case MMC_TIMING_MMC_HS200:
52983382
KL		 1141 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104);
1142 break;
d975f121 1143 case MMC_TIMING_UHS_DDR50:
52983382
KL		 1144 preset = sdhci_readw(host, SDHCI_PRESET_FOR_DDR50);
1145 break;
e9fb05d5
AH		 1146 case MMC_TIMING_MMC_HS400:
1147 preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400);
1148 break;
52983382
KL		 1149 default:
1150 pr_warn("%s: Invalid UHS-I mode selected\n",
1151 mmc_hostname(host->mmc));
1152 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
1153 break;
1154 }
1155 return preset;
1156}
1157
1771059c 1158void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
d129bceb 1159{
c3ed3877 1160 int div = 0; /* Initialized for compiler warning */
df16219f 1161 int real_div = div, clk_mul = 1;
c3ed3877 1162 u16 clk = 0;
7cb2c76f 1163 unsigned long timeout;
d129bceb 1164
1650d0c7
RK		 1165 host->mmc->actual_clock = 0;
1166
4e4141a5 1167 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
d129bceb
PO		 1168
1169 if (clock == 0)
373073ef 1170 return;
d129bceb 1171
85105c53 1172 if (host->version >= SDHCI_SPEC_300) {
da91a8f9 1173 if (host->preset_enabled) {
52983382
KL		 1174 u16 pre_val;
1175
1176 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1177 pre_val = sdhci_get_preset_value(host);
1178 div = (pre_val & SDHCI_PRESET_SDCLK_FREQ_MASK)
1179 >> SDHCI_PRESET_SDCLK_FREQ_SHIFT;
1180 if (host->clk_mul &&
1181 (pre_val & SDHCI_PRESET_CLKGEN_SEL_MASK)) {
1182 clk = SDHCI_PROG_CLOCK_MODE;
1183 real_div = div + 1;
1184 clk_mul = host->clk_mul;
1185 } else {
1186 real_div = max_t(int, 1, div << 1);
1187 }
1188 goto clock_set;
1189 }
1190
c3ed3877
AN		 1191 /*
1192 * Check if the Host Controller supports Programmable Clock
1193 * Mode.
1194 */
1195 if (host->clk_mul) {
52983382
KL		 1196 for (div = 1; div <= 1024; div++) {
1197 if ((host->max_clk * host->clk_mul / div)
1198 <= clock)
1199 break;
1200 }
c3ed3877 1201 /*
52983382
KL		 1202 * Set Programmable Clock Mode in the Clock
1203 * Control register.
c3ed3877 1204 */
52983382
KL		 1205 clk = SDHCI_PROG_CLOCK_MODE;
1206 real_div = div;
1207 clk_mul = host->clk_mul;
1208 div--;
c3ed3877
AN		 1209 } else {
1210 /* Version 3.00 divisors must be a multiple of 2. */
1211 if (host->max_clk <= clock)
1212 div = 1;
1213 else {
1214 for (div = 2; div < SDHCI_MAX_DIV_SPEC_300;
1215 div += 2) {
1216 if ((host->max_clk / div) <= clock)
1217 break;
1218 }
85105c53 1219 }
df16219f 1220 real_div = div;
c3ed3877 1221 div >>= 1;
85105c53
ZG		 1222 }
1223 } else {
1224 /* Version 2.00 divisors must be a power of 2. */
0397526d 1225 for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
85105c53
ZG		 1226 if ((host->max_clk / div) <= clock)
1227 break;
1228 }
df16219f 1229 real_div = div;
c3ed3877 1230 div >>= 1;
d129bceb 1231 }
d129bceb 1232
52983382 1233clock_set:
03d6f5ff 1234 if (real_div)
df16219f 1235 host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div;
c3ed3877 1236 clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
85105c53
ZG		 1237 clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
1238 << SDHCI_DIVIDER_HI_SHIFT;
d129bceb 1239 clk |= SDHCI_CLOCK_INT_EN;
4e4141a5 1240 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb 1241
27f6cb16
CB		 1242 /* Wait max 20 ms */
1243 timeout = 20;
4e4141a5 1244 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
7cb2c76f
PO		 1245 & SDHCI_CLOCK_INT_STABLE)) {
1246 if (timeout == 0) {
a3c76eb9 1247 pr_err("%s: Internal clock never "
acf1da45 1248 "stabilised.\n", mmc_hostname(host->mmc));
d129bceb
PO		 1249 sdhci_dumpregs(host);
1250 return;
1251 }
7cb2c76f
PO		 1252 timeout--;
1253 mdelay(1);
1254 }
d129bceb
PO		 1255
1256 clk |= SDHCI_CLOCK_CARD_EN;
4e4141a5 1257 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb 1258}
1771059c 1259EXPORT_SYMBOL_GPL(sdhci_set_clock);
d129bceb 1260
24fbb3ca
RK		 1261static void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
1262 unsigned short vdd)
146ad66e 1263{
3a48edc4 1264 struct mmc_host *mmc = host->mmc;
8364248a 1265 u8 pwr = 0;
146ad66e 1266
52221610
TK		 1267 if (!IS_ERR(mmc->supply.vmmc)) {
1268 spin_unlock_irq(&host->lock);
4e743f1f 1269 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
52221610 1270 spin_lock_irq(&host->lock);
3cbc6123
TK		 1271
1272 if (mode != MMC_POWER_OFF)
1273 sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL);
1274 else
1275 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1276
52221610
TK		 1277 return;
1278 }
1279
24fbb3ca
RK		 1280 if (mode != MMC_POWER_OFF) {
1281 switch (1 << vdd) {
ae628903
PO		 1282 case MMC_VDD_165_195:
1283 pwr = SDHCI_POWER_180;
1284 break;
1285 case MMC_VDD_29_30:
1286 case MMC_VDD_30_31:
1287 pwr = SDHCI_POWER_300;
1288 break;
1289 case MMC_VDD_32_33:
1290 case MMC_VDD_33_34:
1291 pwr = SDHCI_POWER_330;
1292 break;
1293 default:
1294 BUG();
1295 }
1296 }
1297
1298 if (host->pwr == pwr)
e921a8b6 1299 return;
146ad66e 1300
ae628903
PO		 1301 host->pwr = pwr;
1302
1303 if (pwr == 0) {
4e4141a5 1304 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
f0710a55
AH		 1305 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1306 sdhci_runtime_pm_bus_off(host);
24fbb3ca 1307 vdd = 0;
e921a8b6
RK		 1308 } else {
1309 /*
1310 * Spec says that we should clear the power reg before setting
1311 * a new value. Some controllers don't seem to like this though.
1312 */
1313 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
1314 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
146ad66e 1315
e921a8b6
RK		 1316 /*
1317 * At least the Marvell CaFe chip gets confused if we set the
1318 * voltage and set turn on power at the same time, so set the
1319 * voltage first.
1320 */
1321 if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
1322 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
e08c1694 1323
e921a8b6 1324 pwr |= SDHCI_POWER_ON;
146ad66e 1325
e921a8b6 1326 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
557b0697 1327
e921a8b6
RK		 1328 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1329 sdhci_runtime_pm_bus_on(host);
f0710a55 1330
e921a8b6
RK		 1331 /*
1332 * Some controllers need an extra 10ms delay of 10ms before
1333 * they can apply clock after applying power
1334 */
1335 if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
1336 mdelay(10);
1337 }
146ad66e
PO		 1338}
1339
d129bceb
PO		 1340/*****************************************************************************\
1341 * *
1342 * MMC callbacks *
1343 * *
1344\*****************************************************************************/
1345
1346static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
1347{
1348 struct sdhci_host *host;
505a8680 1349 int present;
d129bceb 1350 unsigned long flags;
473b095a 1351 u32 tuning_opcode;
d129bceb
PO		 1352
1353 host = mmc_priv(mmc);
1354
66fd8ad5
AH		 1355 sdhci_runtime_pm_get(host);
1356
2836766a
KK		 1357 present = mmc_gpio_get_cd(host->mmc);
1358
d129bceb
PO		 1359 spin_lock_irqsave(&host->lock, flags);
1360
1361 WARN_ON(host->mrq != NULL);
1362
f9134319 1363#ifndef SDHCI_USE_LEDS_CLASS
d129bceb 1364 sdhci_activate_led(host);
2f730fec 1365#endif
e89d456f
AW		 1366
1367 /*
1368 * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED
1369 * requests if Auto-CMD12 is enabled.
1370 */
1371 if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) {
c4512f79
JH		 1372 if (mrq->stop) {
1373 mrq->data->stop = NULL;
1374 mrq->stop = NULL;
1375 }
1376 }
d129bceb
PO		 1377
1378 host->mrq = mrq;
1379
505a8680
SG		 1380 /*
1381 * Firstly check card presence from cd-gpio. The return could
1382 * be one of the following possibilities:
1383 * negative: cd-gpio is not available
1384 * zero: cd-gpio is used, and card is removed
1385 * one: cd-gpio is used, and card is present
1386 */
505a8680
SG		 1387 if (present < 0) {
1388 /* If polling, assume that the card is always present. */
1389 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
1390 present = 1;
1391 else
1392 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
1393 SDHCI_CARD_PRESENT;
bec9d4e5
GL		 1394 }
1395
68d1fb7e 1396 if (!present || host->flags & SDHCI_DEVICE_DEAD) {
17b0429d 1397 host->mrq->cmd->error = -ENOMEDIUM;
d129bceb 1398 tasklet_schedule(&host->finish_tasklet);
cf2b5eea
AN		 1399 } else {
1400 u32 present_state;
1401
1402 present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
1403 /*
1404 * Check if the re-tuning timer has already expired and there
7756a96d
YS		 1405 * is no on-going data transfer and DAT0 is not busy. If so,
1406 * we need to execute tuning procedure before sending command.
cf2b5eea
AN		 1407 */
1408 if ((host->flags & SDHCI_NEEDS_RETUNING) &&
7756a96d
YS		 1409 !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ)) &&
1410 (present_state & SDHCI_DATA_0_LVL_MASK)) {
14efd957
CB		 1411 if (mmc->card) {
1412 /* eMMC uses cmd21 but sd and sdio use cmd19 */
1413 tuning_opcode =
1414 mmc->card->type == MMC_TYPE_MMC ?
1415 MMC_SEND_TUNING_BLOCK_HS200 :
1416 MMC_SEND_TUNING_BLOCK;
63c21180
CL		 1417
1418 /* Here we need to set the host->mrq to NULL,
1419 * in case the pending finish_tasklet
1420 * finishes it incorrectly.
1421 */
1422 host->mrq = NULL;
1423
14efd957
CB		 1424 spin_unlock_irqrestore(&host->lock, flags);
1425 sdhci_execute_tuning(mmc, tuning_opcode);
1426 spin_lock_irqsave(&host->lock, flags);
1427
1428 /* Restore original mmc_request structure */
1429 host->mrq = mrq;
1430 }
cf2b5eea
AN		 1431 }
1432
8edf6371 1433 if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23))
e89d456f
AW		 1434 sdhci_send_command(host, mrq->sbc);
1435 else
1436 sdhci_send_command(host, mrq->cmd);
cf2b5eea 1437 }
d129bceb 1438
5f25a66f 1439 mmiowb();
d129bceb
PO		 1440 spin_unlock_irqrestore(&host->lock, flags);
1441}
1442
2317f56c
RK		 1443void sdhci_set_bus_width(struct sdhci_host *host, int width)
1444{
1445 u8 ctrl;
1446
1447 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
1448 if (width == MMC_BUS_WIDTH_8) {
1449 ctrl &= ~SDHCI_CTRL_4BITBUS;
1450 if (host->version >= SDHCI_SPEC_300)
1451 ctrl |= SDHCI_CTRL_8BITBUS;
1452 } else {
1453 if (host->version >= SDHCI_SPEC_300)
1454 ctrl &= ~SDHCI_CTRL_8BITBUS;
1455 if (width == MMC_BUS_WIDTH_4)
1456 ctrl |= SDHCI_CTRL_4BITBUS;
1457 else
1458 ctrl &= ~SDHCI_CTRL_4BITBUS;
1459 }
1460 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1461}
1462EXPORT_SYMBOL_GPL(sdhci_set_bus_width);
1463
96d7b78c
RK		 1464void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
1465{
1466 u16 ctrl_2;
1467
1468 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1469 /* Select Bus Speed Mode for host */
1470 ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
1471 if ((timing == MMC_TIMING_MMC_HS200) ||
1472 (timing == MMC_TIMING_UHS_SDR104))
1473 ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
1474 else if (timing == MMC_TIMING_UHS_SDR12)
1475 ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
1476 else if (timing == MMC_TIMING_UHS_SDR25)
1477 ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
1478 else if (timing == MMC_TIMING_UHS_SDR50)
1479 ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
1480 else if ((timing == MMC_TIMING_UHS_DDR50) ||
1481 (timing == MMC_TIMING_MMC_DDR52))
1482 ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
e9fb05d5
AH		 1483 else if (timing == MMC_TIMING_MMC_HS400)
1484 ctrl_2 |= SDHCI_CTRL_HS400; /* Non-standard */
96d7b78c
RK		 1485 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
1486}
1487EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling);
1488
66fd8ad5 1489static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
d129bceb 1490{
d129bceb
PO		 1491 unsigned long flags;
1492 u8 ctrl;
3a48edc4 1493 struct mmc_host *mmc = host->mmc;
d129bceb 1494
d129bceb
PO		 1495 spin_lock_irqsave(&host->lock, flags);
1496
ceb6143b
AH		 1497 if (host->flags & SDHCI_DEVICE_DEAD) {
1498 spin_unlock_irqrestore(&host->lock, flags);
3a48edc4
TK		 1499 if (!IS_ERR(mmc->supply.vmmc) &&
1500 ios->power_mode == MMC_POWER_OFF)
4e743f1f 1501 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
ceb6143b
AH		 1502 return;
1503 }
1e72859e 1504
d129bceb
PO		 1505 /*
1506 * Reset the chip on each power off.
1507 * Should clear out any weird states.
1508 */
1509 if (ios->power_mode == MMC_POWER_OFF) {
4e4141a5 1510 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
7260cf5e 1511 sdhci_reinit(host);
d129bceb
PO		 1512 }
1513
52983382 1514 if (host->version >= SDHCI_SPEC_300 &&
372c4634
DA		 1515 (ios->power_mode == MMC_POWER_UP) &&
1516 !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN))
52983382
KL		 1517 sdhci_enable_preset_value(host, false);
1518
373073ef 1519 if (!ios->clock || ios->clock != host->clock) {
1771059c 1520 host->ops->set_clock(host, ios->clock);
373073ef 1521 host->clock = ios->clock;
03d6f5ff
AD		 1522
1523 if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK &&
1524 host->clock) {
1525 host->timeout_clk = host->mmc->actual_clock ?
1526 host->mmc->actual_clock / 1000 :
1527 host->clock / 1000;
1528 host->mmc->max_busy_timeout =
1529 host->ops->get_max_timeout_count ?
1530 host->ops->get_max_timeout_count(host) :
1531 1 << 27;
1532 host->mmc->max_busy_timeout /= host->timeout_clk;
1533 }
373073ef 1534 }
d129bceb 1535
24fbb3ca 1536 sdhci_set_power(host, ios->power_mode, ios->vdd);
d129bceb 1537
643a81ff
PR		 1538 if (host->ops->platform_send_init_74_clocks)
1539 host->ops->platform_send_init_74_clocks(host, ios->power_mode);
1540
2317f56c 1541 host->ops->set_bus_width(host, ios->bus_width);
ae6d6c92 1542
15ec4461 1543 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
cd9277c0 1544
3ab9c8da
PR		 1545 if ((ios->timing == MMC_TIMING_SD_HS ||
1546 ios->timing == MMC_TIMING_MMC_HS)
1547 && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT))
cd9277c0
PO		 1548 ctrl |= SDHCI_CTRL_HISPD;
1549 else
1550 ctrl &= ~SDHCI_CTRL_HISPD;
1551
d6d50a15 1552 if (host->version >= SDHCI_SPEC_300) {
49c468fc 1553 u16 clk, ctrl_2;
49c468fc
AN		 1554
1555 /* In case of UHS-I modes, set High Speed Enable */
e9fb05d5
AH		 1556 if ((ios->timing == MMC_TIMING_MMC_HS400) ||
1557 (ios->timing == MMC_TIMING_MMC_HS200) ||
bb8175a8 1558 (ios->timing == MMC_TIMING_MMC_DDR52) ||
069c9f14 1559 (ios->timing == MMC_TIMING_UHS_SDR50) ||
49c468fc
AN		 1560 (ios->timing == MMC_TIMING_UHS_SDR104) ||
1561 (ios->timing == MMC_TIMING_UHS_DDR50) ||
dd8df17f 1562 (ios->timing == MMC_TIMING_UHS_SDR25))
49c468fc 1563 ctrl |= SDHCI_CTRL_HISPD;
d6d50a15 1564
da91a8f9 1565 if (!host->preset_enabled) {
758535c4 1566 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d6d50a15
AN		 1567 /*
1568 * We only need to set Driver Strength if the
1569 * preset value enable is not set.
1570 */
da91a8f9 1571 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
d6d50a15
AN		 1572 ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK;
1573 if (ios->drv_type == MMC_SET_DRIVER_TYPE_A)
1574 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A;
1575 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C)
1576 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C;
1577
1578 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
758535c4
AN		 1579 } else {
1580 /*
1581 * According to SDHC Spec v3.00, if the Preset Value
1582 * Enable in the Host Control 2 register is set, we
1583 * need to reset SD Clock Enable before changing High
1584 * Speed Enable to avoid generating clock gliches.
1585 */
758535c4
AN		 1586
1587 /* Reset SD Clock Enable */
1588 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1589 clk &= ~SDHCI_CLOCK_CARD_EN;
1590 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1591
1592 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1593
1594 /* Re-enable SD Clock */
1771059c 1595 host->ops->set_clock(host, host->clock);
d6d50a15 1596 }
49c468fc 1597
49c468fc
AN		 1598 /* Reset SD Clock Enable */
1599 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1600 clk &= ~SDHCI_CLOCK_CARD_EN;
1601 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1602
96d7b78c 1603 host->ops->set_uhs_signaling(host, ios->timing);
d975f121 1604 host->timing = ios->timing;
49c468fc 1605
52983382
KL		 1606 if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN) &&
1607 ((ios->timing == MMC_TIMING_UHS_SDR12) ||
1608 (ios->timing == MMC_TIMING_UHS_SDR25) ||
1609 (ios->timing == MMC_TIMING_UHS_SDR50) ||
1610 (ios->timing == MMC_TIMING_UHS_SDR104) ||
1611 (ios->timing == MMC_TIMING_UHS_DDR50))) {
1612 u16 preset;
1613
1614 sdhci_enable_preset_value(host, true);
1615 preset = sdhci_get_preset_value(host);
1616 ios->drv_type = (preset & SDHCI_PRESET_DRV_MASK)
1617 >> SDHCI_PRESET_DRV_SHIFT;
1618 }
1619
49c468fc 1620 /* Re-enable SD Clock */
1771059c 1621 host->ops->set_clock(host, host->clock);
758535c4
AN		 1622 } else
1623 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d6d50a15 1624
b8352260
LD		 1625 /*
1626 * Some (ENE) controllers go apeshit on some ios operation,
1627 * signalling timeout and CRC errors even on CMD0. Resetting
1628 * it on each ios seems to solve the problem.
1629 */
c63705e1 1630 if (host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
03231f9b 1631 sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
b8352260 1632
5f25a66f 1633 mmiowb();
d129bceb
PO		 1634 spin_unlock_irqrestore(&host->lock, flags);
1635}
1636
66fd8ad5
AH		 1637static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1638{
1639 struct sdhci_host *host = mmc_priv(mmc);
1640
1641 sdhci_runtime_pm_get(host);
1642 sdhci_do_set_ios(host, ios);
1643 sdhci_runtime_pm_put(host);
1644}
1645
94144a46
KL		 1646static int sdhci_do_get_cd(struct sdhci_host *host)
1647{
1648 int gpio_cd = mmc_gpio_get_cd(host->mmc);
1649
1650 if (host->flags & SDHCI_DEVICE_DEAD)
1651 return 0;
1652
1653 /* If polling/nonremovable, assume that the card is always present. */
1654 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
1655 (host->mmc->caps & MMC_CAP_NONREMOVABLE))
1656 return 1;
1657
1658 /* Try slot gpio detect */
1659 if (!IS_ERR_VALUE(gpio_cd))
1660 return !!gpio_cd;
1661
1662 /* Host native card detect */
1663 return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
1664}
1665
1666static int sdhci_get_cd(struct mmc_host *mmc)
1667{
1668 struct sdhci_host *host = mmc_priv(mmc);
1669 int ret;
1670
1671 sdhci_runtime_pm_get(host);
1672 ret = sdhci_do_get_cd(host);
1673 sdhci_runtime_pm_put(host);
1674 return ret;
1675}
1676
66fd8ad5 1677static int sdhci_check_ro(struct sdhci_host *host)
d129bceb 1678{
d129bceb 1679 unsigned long flags;
2dfb579c 1680 int is_readonly;
d129bceb 1681
d129bceb
PO		 1682 spin_lock_irqsave(&host->lock, flags);
1683
1e72859e 1684 if (host->flags & SDHCI_DEVICE_DEAD)
2dfb579c
WS		 1685 is_readonly = 0;
1686 else if (host->ops->get_ro)
1687 is_readonly = host->ops->get_ro(host);
1e72859e 1688 else
2dfb579c
WS		 1689 is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE)
1690 & SDHCI_WRITE_PROTECT);
d129bceb
PO		 1691
1692 spin_unlock_irqrestore(&host->lock, flags);
1693
2dfb579c
WS		 1694 /* This quirk needs to be replaced by a callback-function later */
1695 return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ?
1696 !is_readonly : is_readonly;
d129bceb
PO		 1697}
1698
82b0e23a
TI		 1699#define SAMPLE_COUNT 5
1700
66fd8ad5 1701static int sdhci_do_get_ro(struct sdhci_host *host)
82b0e23a 1702{
82b0e23a
TI		 1703 int i, ro_count;
1704
82b0e23a 1705 if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT))
66fd8ad5 1706 return sdhci_check_ro(host);
82b0e23a
TI		 1707
1708 ro_count = 0;
1709 for (i = 0; i < SAMPLE_COUNT; i++) {
66fd8ad5 1710 if (sdhci_check_ro(host)) {
82b0e23a
TI		 1711 if (++ro_count > SAMPLE_COUNT / 2)
1712 return 1;
1713 }
1714 msleep(30);
1715 }
1716 return 0;
1717}
1718
20758b66
AH		 1719static void sdhci_hw_reset(struct mmc_host *mmc)
1720{
1721 struct sdhci_host *host = mmc_priv(mmc);
1722
1723 if (host->ops && host->ops->hw_reset)
1724 host->ops->hw_reset(host);
1725}
1726
66fd8ad5 1727static int sdhci_get_ro(struct mmc_host *mmc)
f75979b7 1728{
66fd8ad5
AH		 1729 struct sdhci_host *host = mmc_priv(mmc);
1730 int ret;
f75979b7 1731
66fd8ad5
AH		 1732 sdhci_runtime_pm_get(host);
1733 ret = sdhci_do_get_ro(host);
1734 sdhci_runtime_pm_put(host);
1735 return ret;
1736}
f75979b7 1737
66fd8ad5
AH		 1738static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable)
1739{
be138554 1740 if (!(host->flags & SDHCI_DEVICE_DEAD)) {
ef104333 1741 if (enable)
b537f94c 1742 host->ier |= SDHCI_INT_CARD_INT;
ef104333 1743 else
b537f94c
RK		 1744 host->ier &= ~SDHCI_INT_CARD_INT;
1745
1746 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
1747 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
ef104333
RK		 1748 mmiowb();
1749 }
66fd8ad5
AH		 1750}
1751
1752static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
1753{
1754 struct sdhci_host *host = mmc_priv(mmc);
1755 unsigned long flags;
f75979b7 1756
ef104333
RK		 1757 sdhci_runtime_pm_get(host);
1758
66fd8ad5 1759 spin_lock_irqsave(&host->lock, flags);
ef104333
RK		 1760 if (enable)
1761 host->flags |= SDHCI_SDIO_IRQ_ENABLED;
1762 else
1763 host->flags &= ~SDHCI_SDIO_IRQ_ENABLED;
1764
66fd8ad5 1765 sdhci_enable_sdio_irq_nolock(host, enable);
f75979b7 1766 spin_unlock_irqrestore(&host->lock, flags);
ef104333
RK		 1767
1768 sdhci_runtime_pm_put(host);
f75979b7
PO		 1769}
1770
20b92a30 1771static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
21f5998f 1772 struct mmc_ios *ios)
f2119df6 1773{
3a48edc4 1774 struct mmc_host *mmc = host->mmc;
20b92a30 1775 u16 ctrl;
6231f3de 1776 int ret;
f2119df6 1777
20b92a30
KL		 1778 /*
1779 * Signal Voltage Switching is only applicable for Host Controllers
1780 * v3.00 and above.
1781 */
1782 if (host->version < SDHCI_SPEC_300)
1783 return 0;
6231f3de 1784
f2119df6 1785 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
f2119df6 1786
21f5998f 1787 switch (ios->signal_voltage) {
20b92a30
KL		 1788 case MMC_SIGNAL_VOLTAGE_330:
1789 /* Set 1.8V Signal Enable in the Host Control2 register to 0 */
1790 ctrl &= ~SDHCI_CTRL_VDD_180;
1791 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
f2119df6 1792
3a48edc4
TK		 1793 if (!IS_ERR(mmc->supply.vqmmc)) {
1794 ret = regulator_set_voltage(mmc->supply.vqmmc, 2700000,
1795 3600000);
20b92a30 1796 if (ret) {
6606110d
JP		 1797 pr_warn("%s: Switching to 3.3V signalling voltage failed\n",
1798 mmc_hostname(mmc));
20b92a30
KL		 1799 return -EIO;
1800 }
1801 }
1802 /* Wait for 5ms */
1803 usleep_range(5000, 5500);
f2119df6 1804
20b92a30
KL		 1805 /* 3.3V regulator output should be stable within 5 ms */
1806 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1807 if (!(ctrl & SDHCI_CTRL_VDD_180))
1808 return 0;
6231f3de 1809
6606110d
JP		 1810 pr_warn("%s: 3.3V regulator output did not became stable\n",
1811 mmc_hostname(mmc));
20b92a30
KL		 1812
1813 return -EAGAIN;
1814 case MMC_SIGNAL_VOLTAGE_180:
3a48edc4
TK		 1815 if (!IS_ERR(mmc->supply.vqmmc)) {
1816 ret = regulator_set_voltage(mmc->supply.vqmmc,
20b92a30
KL		 1817 1700000, 1950000);
1818 if (ret) {
6606110d
JP		 1819 pr_warn("%s: Switching to 1.8V signalling voltage failed\n",
1820 mmc_hostname(mmc));
20b92a30
KL		 1821 return -EIO;
1822 }
1823 }
6231f3de 1824
6231f3de
PR		 1825 /*
1826 * Enable 1.8V Signal Enable in the Host Control2
1827 * register
1828 */
20b92a30
KL		 1829 ctrl |= SDHCI_CTRL_VDD_180;
1830 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
6231f3de 1831
9d967a61
VY		 1832 /* Some controller need to do more when switching */
1833 if (host->ops->voltage_switch)
1834 host->ops->voltage_switch(host);
1835
20b92a30
KL		 1836 /* 1.8V regulator output should be stable within 5 ms */
1837 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1838 if (ctrl & SDHCI_CTRL_VDD_180)
1839 return 0;
f2119df6 1840
6606110d
JP		 1841 pr_warn("%s: 1.8V regulator output did not became stable\n",
1842 mmc_hostname(mmc));
f2119df6 1843
20b92a30
KL		 1844 return -EAGAIN;
1845 case MMC_SIGNAL_VOLTAGE_120:
3a48edc4
TK		 1846 if (!IS_ERR(mmc->supply.vqmmc)) {
1847 ret = regulator_set_voltage(mmc->supply.vqmmc, 1100000,
1848 1300000);
20b92a30 1849 if (ret) {
6606110d
JP		 1850 pr_warn("%s: Switching to 1.2V signalling voltage failed\n",
1851 mmc_hostname(mmc));
20b92a30 1852 return -EIO;
f2119df6
AN		 1853 }
1854 }
6231f3de 1855 return 0;
20b92a30 1856 default:
f2119df6
AN		 1857 /* No signal voltage switch required */
1858 return 0;
20b92a30 1859 }
f2119df6
AN		 1860}
1861
66fd8ad5 1862static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
21f5998f 1863 struct mmc_ios *ios)
66fd8ad5
AH		 1864{
1865 struct sdhci_host *host = mmc_priv(mmc);
1866 int err;
1867
1868 if (host->version < SDHCI_SPEC_300)
1869 return 0;
1870 sdhci_runtime_pm_get(host);
21f5998f 1871 err = sdhci_do_start_signal_voltage_switch(host, ios);
66fd8ad5
AH		 1872 sdhci_runtime_pm_put(host);
1873 return err;
1874}
1875
20b92a30
KL		 1876static int sdhci_card_busy(struct mmc_host *mmc)
1877{
1878 struct sdhci_host *host = mmc_priv(mmc);
1879 u32 present_state;
1880
1881 sdhci_runtime_pm_get(host);
1882 /* Check whether DAT[3:0] is 0000 */
1883 present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
1884 sdhci_runtime_pm_put(host);
1885
1886 return !(present_state & SDHCI_DATA_LVL_MASK);
1887}
1888
b5540ce1
AH		 1889static int sdhci_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
1890{
1891 struct sdhci_host *host = mmc_priv(mmc);
1892 unsigned long flags;
1893
1894 spin_lock_irqsave(&host->lock, flags);
1895 host->flags |= SDHCI_HS400_TUNING;
1896 spin_unlock_irqrestore(&host->lock, flags);
1897
1898 return 0;
1899}
1900
069c9f14 1901static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
b513ea25 1902{
4b6f37d3 1903 struct sdhci_host *host = mmc_priv(mmc);
b513ea25 1904 u16 ctrl;
b513ea25 1905 int tuning_loop_counter = MAX_TUNING_LOOP;
b513ea25 1906 int err = 0;
2b35bd83 1907 unsigned long flags;
38e40bf5 1908 unsigned int tuning_count = 0;
b5540ce1 1909 bool hs400_tuning;
b513ea25 1910
66fd8ad5 1911 sdhci_runtime_pm_get(host);
2b35bd83 1912 spin_lock_irqsave(&host->lock, flags);
b513ea25 1913
b5540ce1
AH		 1914 hs400_tuning = host->flags & SDHCI_HS400_TUNING;
1915 host->flags &= ~SDHCI_HS400_TUNING;
1916
38e40bf5
AH		 1917 if (host->tuning_mode == SDHCI_TUNING_MODE_1)
1918 tuning_count = host->tuning_count;
1919
b513ea25 1920 /*
069c9f14
G		 1921 * The Host Controller needs tuning only in case of SDR104 mode
1922 * and for SDR50 mode when Use Tuning for SDR50 is set in the
b513ea25 1923 * Capabilities register.
069c9f14
G		 1924 * If the Host Controller supports the HS200 mode then the
1925 * tuning function has to be executed.
b513ea25 1926 */
4b6f37d3 1927 switch (host->timing) {
b5540ce1 1928 /* HS400 tuning is done in HS200 mode */
e9fb05d5 1929 case MMC_TIMING_MMC_HS400:
b5540ce1
AH		 1930 err = -EINVAL;
1931 goto out_unlock;
1932
4b6f37d3 1933 case MMC_TIMING_MMC_HS200:
b5540ce1
AH		 1934 /*
1935 * Periodic re-tuning for HS400 is not expected to be needed, so
1936 * disable it here.
1937 */
1938 if (hs400_tuning)
1939 tuning_count = 0;
1940 break;
1941
4b6f37d3
RK		 1942 case MMC_TIMING_UHS_SDR104:
1943 break;
1944
1945 case MMC_TIMING_UHS_SDR50:
1946 if (host->flags & SDHCI_SDR50_NEEDS_TUNING ||
1947 host->flags & SDHCI_SDR104_NEEDS_TUNING)
1948 break;
1949 /* FALLTHROUGH */
1950
1951 default:
d519c863 1952 goto out_unlock;
b513ea25
AN		 1953 }
1954
45251812 1955 if (host->ops->platform_execute_tuning) {
2b35bd83 1956 spin_unlock_irqrestore(&host->lock, flags);
45251812
DA		 1957 err = host->ops->platform_execute_tuning(host, opcode);
1958 sdhci_runtime_pm_put(host);
1959 return err;
1960 }
1961
4b6f37d3
RK		 1962 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1963 ctrl |= SDHCI_CTRL_EXEC_TUNING;
b513ea25
AN		 1964 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
1965
1966 /*
1967 * As per the Host Controller spec v3.00, tuning command
1968 * generates Buffer Read Ready interrupt, so enable that.
1969 *
1970 * Note: The spec clearly says that when tuning sequence
1971 * is being performed, the controller does not generate
1972 * interrupts other than Buffer Read Ready interrupt. But
1973 * to make sure we don't hit a controller bug, we _only_
1974 * enable Buffer Read Ready interrupt here.
1975 */
b537f94c
RK		 1976 sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
1977 sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);
b513ea25
AN		 1978
1979 /*
1980 * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number
1981 * of loops reaches 40 times or a timeout of 150ms occurs.
1982 */
b513ea25
AN		 1983 do {
1984 struct mmc_command cmd = {0};
66fd8ad5 1985 struct mmc_request mrq = {NULL};
b513ea25 1986
069c9f14 1987 cmd.opcode = opcode;
b513ea25
AN		 1988 cmd.arg = 0;
1989 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
1990 cmd.retries = 0;
1991 cmd.data = NULL;
1992 cmd.error = 0;
1993
7ce45e95
AC		 1994 if (tuning_loop_counter-- == 0)
1995 break;
1996
b513ea25
AN		 1997 mrq.cmd = &cmd;
1998 host->mrq = &mrq;
1999
2000 /*
2001 * In response to CMD19, the card sends 64 bytes of tuning
2002 * block to the Host Controller. So we set the block size
2003 * to 64 here.
2004 */
069c9f14
G		 2005 if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200) {
2006 if (mmc->ios.bus_width == MMC_BUS_WIDTH_8)
2007 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128),
2008 SDHCI_BLOCK_SIZE);
2009 else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4)
2010 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64),
2011 SDHCI_BLOCK_SIZE);
2012 } else {
2013 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64),
2014 SDHCI_BLOCK_SIZE);
2015 }
b513ea25
AN		 2016
2017 /*
2018 * The tuning block is sent by the card to the host controller.
2019 * So we set the TRNS_READ bit in the Transfer Mode register.
2020 * This also takes care of setting DMA Enable and Multi Block
2021 * Select in the same register to 0.
2022 */
2023 sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
2024
2025 sdhci_send_command(host, &cmd);
2026
2027 host->cmd = NULL;
2028 host->mrq = NULL;
2029
2b35bd83 2030 spin_unlock_irqrestore(&host->lock, flags);
b513ea25
AN		 2031 /* Wait for Buffer Read Ready interrupt */
2032 wait_event_interruptible_timeout(host->buf_ready_int,
2033 (host->tuning_done == 1),
2034 msecs_to_jiffies(50));
2b35bd83 2035 spin_lock_irqsave(&host->lock, flags);
b513ea25
AN		 2036
2037 if (!host->tuning_done) {
a3c76eb9 2038 pr_info(DRIVER_NAME ": Timeout waiting for "
b513ea25
AN		 2039 "Buffer Read Ready interrupt during tuning "
2040 "procedure, falling back to fixed sampling "
2041 "clock\n");
2042 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2043 ctrl &= ~SDHCI_CTRL_TUNED_CLK;
2044 ctrl &= ~SDHCI_CTRL_EXEC_TUNING;
2045 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2046
2047 err = -EIO;
2048 goto out;
2049 }
2050
2051 host->tuning_done = 0;
2052
2053 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
197160d5
NS		 2054
2055 /* eMMC spec does not require a delay between tuning cycles */
2056 if (opcode == MMC_SEND_TUNING_BLOCK)
2057 mdelay(1);
b513ea25
AN		 2058 } while (ctrl & SDHCI_CTRL_EXEC_TUNING);
2059
2060 /*
2061 * The Host Driver has exhausted the maximum number of loops allowed,
2062 * so use fixed sampling frequency.
2063 */
7ce45e95 2064 if (tuning_loop_counter < 0) {
b513ea25
AN		 2065 ctrl &= ~SDHCI_CTRL_TUNED_CLK;
2066 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
7ce45e95
AC		 2067 }
2068 if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
2069 pr_info(DRIVER_NAME ": Tuning procedure"
2070 " failed, falling back to fixed sampling"
2071 " clock\n");
114f2bf6 2072 err = -EIO;
b513ea25
AN		 2073 }
2074
2075out:
38e40bf5
AH		 2076 host->flags &= ~SDHCI_NEEDS_RETUNING;
2077
2078 if (tuning_count) {
973905fe 2079 host->flags |= SDHCI_USING_RETUNING_TIMER;
38e40bf5 2080 mod_timer(&host->tuning_timer, jiffies + tuning_count * HZ);
cf2b5eea
AN		 2081 }
2082
2083 /*
2084 * In case tuning fails, host controllers which support re-tuning can
2085 * try tuning again at a later time, when the re-tuning timer expires.
2086 * So for these controllers, we return 0. Since there might be other
2087 * controllers who do not have this capability, we return error for
973905fe
AL		 2088 * them. SDHCI_USING_RETUNING_TIMER means the host is currently using
2089 * a retuning timer to do the retuning for the card.
cf2b5eea 2090 */
973905fe 2091 if (err && (host->flags & SDHCI_USING_RETUNING_TIMER))
cf2b5eea
AN		 2092 err = 0;
2093
b537f94c
RK		 2094 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2095 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
d519c863 2096out_unlock:
2b35bd83 2097 spin_unlock_irqrestore(&host->lock, flags);
66fd8ad5 2098 sdhci_runtime_pm_put(host);
b513ea25
AN		 2099
2100 return err;
2101}
2102
52983382
KL		 2103
2104static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
4d55c5a1 2105{
4d55c5a1
AN		 2106 /* Host Controller v3.00 defines preset value registers */
2107 if (host->version < SDHCI_SPEC_300)
2108 return;
2109
4d55c5a1
AN		 2110 /*
2111 * We only enable or disable Preset Value if they are not already
2112 * enabled or disabled respectively. Otherwise, we bail out.
2113 */
da91a8f9
RK		 2114 if (host->preset_enabled != enable) {
2115 u16 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2116
2117 if (enable)
2118 ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE;
2119 else
2120 ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
2121
4d55c5a1 2122 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
da91a8f9
RK		 2123
2124 if (enable)
2125 host->flags |= SDHCI_PV_ENABLED;
2126 else
2127 host->flags &= ~SDHCI_PV_ENABLED;
2128
2129 host->preset_enabled = enable;
4d55c5a1 2130 }
66fd8ad5
AH		 2131}
2132
348487cb
HC		 2133static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
2134 int err)
2135{
2136 struct sdhci_host *host = mmc_priv(mmc);
2137 struct mmc_data *data = mrq->data;
2138
2139 if (host->flags & SDHCI_REQ_USE_DMA) {
2140 if (data->host_cookie)
2141 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
2142 data->flags & MMC_DATA_WRITE ?
2143 DMA_TO_DEVICE : DMA_FROM_DEVICE);
2144 mrq->data->host_cookie = 0;
2145 }
2146}
2147
2148static int sdhci_pre_dma_transfer(struct sdhci_host *host,
2149 struct mmc_data *data,
2150 struct sdhci_host_next *next)
2151{
2152 int sg_count;
2153
2154 if (!next && data->host_cookie &&
2155 data->host_cookie != host->next_data.cookie) {
2156 pr_debug(DRIVER_NAME "[%s] invalid cookie: %d, next-cookie %d\n",
2157 __func__, data->host_cookie, host->next_data.cookie);
2158 data->host_cookie = 0;
2159 }
2160
2161 /* Check if next job is already prepared */
2162 if (next ||
2163 (!next && data->host_cookie != host->next_data.cookie)) {
2164 sg_count = dma_map_sg(mmc_dev(host->mmc), data->sg,
2165 data->sg_len,
2166 data->flags & MMC_DATA_WRITE ?
2167 DMA_TO_DEVICE : DMA_FROM_DEVICE);
2168
2169 } else {
2170 sg_count = host->next_data.sg_count;
2171 host->next_data.sg_count = 0;
2172 }
2173
2174
2175 if (sg_count == 0)
2176 return -EINVAL;
2177
2178 if (next) {
2179 next->sg_count = sg_count;
2180 data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie;
2181 } else
2182 host->sg_count = sg_count;
2183
2184 return sg_count;
2185}
2186
2187static void sdhci_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
2188 bool is_first_req)
2189{
2190 struct sdhci_host *host = mmc_priv(mmc);
2191
2192 if (mrq->data->host_cookie) {
2193 mrq->data->host_cookie = 0;
2194 return;
2195 }
2196
2197 if (host->flags & SDHCI_REQ_USE_DMA)
2198 if (sdhci_pre_dma_transfer(host,
2199 mrq->data,
2200 &host->next_data) < 0)
2201 mrq->data->host_cookie = 0;
2202}
2203
71e69211 2204static void sdhci_card_event(struct mmc_host *mmc)
d129bceb 2205{
71e69211 2206 struct sdhci_host *host = mmc_priv(mmc);
d129bceb 2207 unsigned long flags;
2836766a 2208 int present;
d129bceb 2209
722e1280
CD		 2210 /* First check if client has provided their own card event */
2211 if (host->ops->card_event)
2212 host->ops->card_event(host);
2213
2836766a
KK		 2214 present = sdhci_do_get_cd(host);
2215
d129bceb
PO		 2216 spin_lock_irqsave(&host->lock, flags);
2217
66fd8ad5 2218 /* Check host->mrq first in case we are runtime suspended */
2836766a 2219 if (host->mrq && !present) {
a3c76eb9 2220 pr_err("%s: Card removed during transfer!\n",
66fd8ad5 2221 mmc_hostname(host->mmc));
a3c76eb9 2222 pr_err("%s: Resetting controller.\n",
66fd8ad5 2223 mmc_hostname(host->mmc));
d129bceb 2224
03231f9b
RK		 2225 sdhci_do_reset(host, SDHCI_RESET_CMD);
2226 sdhci_do_reset(host, SDHCI_RESET_DATA);
d129bceb 2227
66fd8ad5
AH		 2228 host->mrq->cmd->error = -ENOMEDIUM;
2229 tasklet_schedule(&host->finish_tasklet);
d129bceb
PO		 2230 }
2231
2232 spin_unlock_irqrestore(&host->lock, flags);
71e69211
GL		 2233}
2234
2235static const struct mmc_host_ops sdhci_ops = {
2236 .request = sdhci_request,
348487cb
HC		 2237 .post_req = sdhci_post_req,
2238 .pre_req = sdhci_pre_req,
71e69211 2239 .set_ios = sdhci_set_ios,
94144a46 2240 .get_cd = sdhci_get_cd,
71e69211
GL		 2241 .get_ro = sdhci_get_ro,
2242 .hw_reset = sdhci_hw_reset,
2243 .enable_sdio_irq = sdhci_enable_sdio_irq,
2244 .start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
b5540ce1 2245 .prepare_hs400_tuning = sdhci_prepare_hs400_tuning,
71e69211 2246 .execute_tuning = sdhci_execute_tuning,
71e69211 2247 .card_event = sdhci_card_event,
20b92a30 2248 .card_busy = sdhci_card_busy,
71e69211
GL		 2249};
2250
2251/*****************************************************************************\
2252 * *
2253 * Tasklets *
2254 * *
2255\*****************************************************************************/
2256
d129bceb
PO		 2257static void sdhci_tasklet_finish(unsigned long param)
2258{
2259 struct sdhci_host *host;
2260 unsigned long flags;
2261 struct mmc_request *mrq;
2262
2263 host = (struct sdhci_host*)param;
2264
66fd8ad5
AH		 2265 spin_lock_irqsave(&host->lock, flags);
2266
0c9c99a7
CB		 2267 /*
2268 * If this tasklet gets rescheduled while running, it will
2269 * be run again afterwards but without any active request.
2270 */
66fd8ad5
AH		 2271 if (!host->mrq) {
2272 spin_unlock_irqrestore(&host->lock, flags);
0c9c99a7 2273 return;
66fd8ad5 2274 }
d129bceb
PO		 2275
2276 del_timer(&host->timer);
2277
2278 mrq = host->mrq;
2279
d129bceb
PO		 2280 /*
2281 * The controller needs a reset of internal state machines
2282 * upon error conditions.
2283 */
1e72859e 2284 if (!(host->flags & SDHCI_DEVICE_DEAD) &&
b7b4d342 2285 ((mrq->cmd && mrq->cmd->error) ||
fce9d33f
AG		 2286 (mrq->sbc && mrq->sbc->error) ||
2287 (mrq->data && ((mrq->data->error && !mrq->data->stop) ||
2288 (mrq->data->stop && mrq->data->stop->error))) ||
2289 (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
645289dc
PO		 2290
2291 /* Some controllers need this kick or reset won't work here */
8213af3b 2292 if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)
645289dc 2293 /* This is to force an update */
1771059c 2294 host->ops->set_clock(host, host->clock);
645289dc
PO		 2295
2296 /* Spec says we should do both at the same time, but Ricoh
2297 controllers do not like that. */
03231f9b
RK		 2298 sdhci_do_reset(host, SDHCI_RESET_CMD);
2299 sdhci_do_reset(host, SDHCI_RESET_DATA);
d129bceb
PO		 2300 }
2301
2302 host->mrq = NULL;
2303 host->cmd = NULL;
2304 host->data = NULL;
2305
f9134319 2306#ifndef SDHCI_USE_LEDS_CLASS
d129bceb 2307 sdhci_deactivate_led(host);
2f730fec 2308#endif
d129bceb 2309
5f25a66f 2310 mmiowb();
d129bceb
PO		 2311 spin_unlock_irqrestore(&host->lock, flags);
2312
2313 mmc_request_done(host->mmc, mrq);
66fd8ad5 2314 sdhci_runtime_pm_put(host);
d129bceb
PO		 2315}
2316
2317static void sdhci_timeout_timer(unsigned long data)
2318{
2319 struct sdhci_host *host;
2320 unsigned long flags;
2321
2322 host = (struct sdhci_host*)data;
2323
2324 spin_lock_irqsave(&host->lock, flags);
2325
2326 if (host->mrq) {
a3c76eb9 2327 pr_err("%s: Timeout waiting for hardware "
acf1da45 2328 "interrupt.\n", mmc_hostname(host->mmc));
d129bceb
PO		 2329 sdhci_dumpregs(host);
2330
2331 if (host->data) {
17b0429d 2332 host->data->error = -ETIMEDOUT;
d129bceb
PO		 2333 sdhci_finish_data(host);
2334 } else {
2335 if (host->cmd)
17b0429d 2336 host->cmd->error = -ETIMEDOUT;
d129bceb 2337 else
17b0429d 2338 host->mrq->cmd->error = -ETIMEDOUT;
d129bceb
PO		 2339
2340 tasklet_schedule(&host->finish_tasklet);
2341 }
2342 }
2343
5f25a66f 2344 mmiowb();
d129bceb
PO		 2345 spin_unlock_irqrestore(&host->lock, flags);
2346}
2347
cf2b5eea
AN		 2348static void sdhci_tuning_timer(unsigned long data)
2349{
2350 struct sdhci_host *host;
2351 unsigned long flags;
2352
2353 host = (struct sdhci_host *)data;
2354
2355 spin_lock_irqsave(&host->lock, flags);
2356
2357 host->flags |= SDHCI_NEEDS_RETUNING;
2358
2359 spin_unlock_irqrestore(&host->lock, flags);
2360}
2361
d129bceb
PO		 2362/*****************************************************************************\
2363 * *
2364 * Interrupt handling *
2365 * *
2366\*****************************************************************************/
2367
61541397 2368static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *mask)
d129bceb
PO		 2369{
2370 BUG_ON(intmask == 0);
2371
2372 if (!host->cmd) {
a3c76eb9 2373 pr_err("%s: Got command interrupt 0x%08x even "
b67ac3f3
PO		 2374 "though no command operation was in progress.\n",
2375 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 2376 sdhci_dumpregs(host);
2377 return;
2378 }
2379
43b58b36 2380 if (intmask & SDHCI_INT_TIMEOUT)
17b0429d
PO		 2381 host->cmd->error = -ETIMEDOUT;
2382 else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT |
2383 SDHCI_INT_INDEX))
2384 host->cmd->error = -EILSEQ;
43b58b36 2385
e809517f 2386 if (host->cmd->error) {
d129bceb 2387 tasklet_schedule(&host->finish_tasklet);
e809517f
PO		 2388 return;
2389 }
2390
2391 /*
2392 * The host can send and interrupt when the busy state has
2393 * ended, allowing us to wait without wasting CPU cycles.
2394 * Unfortunately this is overloaded on the "data complete"
2395 * interrupt, so we need to take some care when handling
2396 * it.
2397 *
2398 * Note: The 1.0 specification is a bit ambiguous about this
2399 * feature so there might be some problems with older
2400 * controllers.
2401 */
2402 if (host->cmd->flags & MMC_RSP_BUSY) {
2403 if (host->cmd->data)
2404 DBG("Cannot wait for busy signal when also "
2405 "doing a data transfer");
e99783a4
CM		 2406 else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ)
2407 && !host->busy_handle) {
2408 /* Mark that command complete before busy is ended */
2409 host->busy_handle = 1;
e809517f 2410 return;
e99783a4 2411 }
f945405c
BD		 2412
2413 /* The controller does not support the end-of-busy IRQ,
2414 * fall through and take the SDHCI_INT_RESPONSE */
61541397
AH		 2415 } else if ((host->quirks2 & SDHCI_QUIRK2_STOP_WITH_TC) &&
2416 host->cmd->opcode == MMC_STOP_TRANSMISSION && !host->data) {
2417 *mask &= ~SDHCI_INT_DATA_END;
e809517f
PO		 2418 }
2419
2420 if (intmask & SDHCI_INT_RESPONSE)
43b58b36 2421 sdhci_finish_command(host);
d129bceb
PO		 2422}
2423
0957c333 2424#ifdef CONFIG_MMC_DEBUG
08621b18 2425static void sdhci_adma_show_error(struct sdhci_host *host)
6882a8c0
BD		 2426{
2427 const char *name = mmc_hostname(host->mmc);
1c3d5f6d 2428 void *desc = host->adma_table;
6882a8c0
BD		 2429
2430 sdhci_dumpregs(host);
2431
2432 while (true) {
e57a5f61
AH		 2433 struct sdhci_adma2_64_desc *dma_desc = desc;
2434
2435 if (host->flags & SDHCI_USE_64_BIT_DMA)
2436 DBG("%s: %p: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n",
2437 name, desc, le32_to_cpu(dma_desc->addr_hi),
2438 le32_to_cpu(dma_desc->addr_lo),
2439 le16_to_cpu(dma_desc->len),
2440 le16_to_cpu(dma_desc->cmd));
2441 else
2442 DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n",
2443 name, desc, le32_to_cpu(dma_desc->addr_lo),
2444 le16_to_cpu(dma_desc->len),
2445 le16_to_cpu(dma_desc->cmd));
6882a8c0 2446
76fe379a 2447 desc += host->desc_sz;
6882a8c0 2448
0545230f 2449 if (dma_desc->cmd & cpu_to_le16(ADMA2_END))
6882a8c0
BD		 2450 break;
2451 }
2452}
2453#else
08621b18 2454static void sdhci_adma_show_error(struct sdhci_host *host) { }
6882a8c0
BD		 2455#endif
2456
d129bceb
PO		 2457static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
2458{
069c9f14 2459 u32 command;
d129bceb
PO		 2460 BUG_ON(intmask == 0);
2461
b513ea25
AN		 2462 /* CMD19 generates _only_ Buffer Read Ready interrupt */
2463 if (intmask & SDHCI_INT_DATA_AVAIL) {
069c9f14
G		 2464 command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND));
2465 if (command == MMC_SEND_TUNING_BLOCK ||
2466 command == MMC_SEND_TUNING_BLOCK_HS200) {
b513ea25
AN		 2467 host->tuning_done = 1;
2468 wake_up(&host->buf_ready_int);
2469 return;
2470 }
2471 }
2472
d129bceb
PO		 2473 if (!host->data) {
2474 /*
e809517f
PO		 2475 * The "data complete" interrupt is also used to
2476 * indicate that a busy state has ended. See comment
2477 * above in sdhci_cmd_irq().
d129bceb 2478 */
e809517f 2479 if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) {
c5abd5e8
MC		 2480 if (intmask & SDHCI_INT_DATA_TIMEOUT) {
2481 host->cmd->error = -ETIMEDOUT;
2482 tasklet_schedule(&host->finish_tasklet);
2483 return;
2484 }
e809517f 2485 if (intmask & SDHCI_INT_DATA_END) {
e99783a4
CM		 2486 /*
2487 * Some cards handle busy-end interrupt
2488 * before the command completed, so make
2489 * sure we do things in the proper order.
2490 */
2491 if (host->busy_handle)
2492 sdhci_finish_command(host);
2493 else
2494 host->busy_handle = 1;
e809517f
PO		 2495 return;
2496 }
2497 }
d129bceb 2498
a3c76eb9 2499 pr_err("%s: Got data interrupt 0x%08x even "
b67ac3f3
PO		 2500 "though no data operation was in progress.\n",
2501 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 2502 sdhci_dumpregs(host);
2503
2504 return;
2505 }
2506
2507 if (intmask & SDHCI_INT_DATA_TIMEOUT)
17b0429d 2508 host->data->error = -ETIMEDOUT;
22113efd
AL		 2509 else if (intmask & SDHCI_INT_DATA_END_BIT)
2510 host->data->error = -EILSEQ;
2511 else if ((intmask & SDHCI_INT_DATA_CRC) &&
2512 SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))
2513 != MMC_BUS_TEST_R)
17b0429d 2514 host->data->error = -EILSEQ;
6882a8c0 2515 else if (intmask & SDHCI_INT_ADMA_ERROR) {
a3c76eb9 2516 pr_err("%s: ADMA error\n", mmc_hostname(host->mmc));
08621b18 2517 sdhci_adma_show_error(host);
2134a922 2518 host->data->error = -EIO;
a4071fbb
HZ		 2519 if (host->ops->adma_workaround)
2520 host->ops->adma_workaround(host, intmask);
6882a8c0 2521 }
d129bceb 2522
17b0429d 2523 if (host->data->error)
d129bceb
PO		 2524 sdhci_finish_data(host);
2525 else {
a406f5a3 2526 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
d129bceb
PO		 2527 sdhci_transfer_pio(host);
2528
6ba736a1
PO		 2529 /*
2530 * We currently don't do anything fancy with DMA
2531 * boundaries, but as we can't disable the feature
2532 * we need to at least restart the transfer.
f6a03cbf
MV		 2533 *
2534 * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS)
2535 * should return a valid address to continue from, but as
2536 * some controllers are faulty, don't trust them.
6ba736a1 2537 */
f6a03cbf
MV		 2538 if (intmask & SDHCI_INT_DMA_END) {
2539 u32 dmastart, dmanow;
2540 dmastart = sg_dma_address(host->data->sg);
2541 dmanow = dmastart + host->data->bytes_xfered;
2542 /*
2543 * Force update to the next DMA block boundary.
2544 */
2545 dmanow = (dmanow &
2546 ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
2547 SDHCI_DEFAULT_BOUNDARY_SIZE;
2548 host->data->bytes_xfered = dmanow - dmastart;
2549 DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes,"
2550 " next 0x%08x\n",
2551 mmc_hostname(host->mmc), dmastart,
2552 host->data->bytes_xfered, dmanow);
2553 sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
2554 }
6ba736a1 2555
e538fbe8
PO		 2556 if (intmask & SDHCI_INT_DATA_END) {
2557 if (host->cmd) {
2558 /*
2559 * Data managed to finish before the
2560 * command completed. Make sure we do
2561 * things in the proper order.
2562 */
2563 host->data_early = 1;
2564 } else {
2565 sdhci_finish_data(host);
2566 }
2567 }
d129bceb
PO		 2568 }
2569}
2570
7d12e780 2571static irqreturn_t sdhci_irq(int irq, void *dev_id)
d129bceb 2572{
781e989c 2573 irqreturn_t result = IRQ_NONE;
66fd8ad5 2574 struct sdhci_host *host = dev_id;
41005003 2575 u32 intmask, mask, unexpected = 0;
781e989c 2576 int max_loops = 16;
d129bceb
PO		 2577
2578 spin_lock(&host->lock);
2579
be138554 2580 if (host->runtime_suspended && !sdhci_sdio_irq_enabled(host)) {
66fd8ad5 2581 spin_unlock(&host->lock);
655bca76 2582 return IRQ_NONE;
66fd8ad5
AH		 2583 }
2584
4e4141a5 2585 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
62df67a5 2586 if (!intmask || intmask == 0xffffffff) {
d129bceb
PO		 2587 result = IRQ_NONE;
2588 goto out;
2589 }
2590
41005003
RK		 2591 do {
2592 /* Clear selected interrupts. */
2593 mask = intmask & (SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |
2594 SDHCI_INT_BUS_POWER);
2595 sdhci_writel(host, mask, SDHCI_INT_STATUS);
d129bceb 2596
41005003
RK		 2597 DBG("*** %s got interrupt: 0x%08x\n",
2598 mmc_hostname(host->mmc), intmask);
d129bceb 2599
41005003
RK		 2600 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
2601 u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
2602 SDHCI_CARD_PRESENT;
d129bceb 2603
41005003
RK		 2604 /*
2605 * There is a observation on i.mx esdhc. INSERT
2606 * bit will be immediately set again when it gets
2607 * cleared, if a card is inserted. We have to mask
2608 * the irq to prevent interrupt storm which will
2609 * freeze the system. And the REMOVE gets the
2610 * same situation.
2611 *
2612 * More testing are needed here to ensure it works
2613 * for other platforms though.
2614 */
b537f94c
RK		 2615 host->ier &= ~(SDHCI_INT_CARD_INSERT |
2616 SDHCI_INT_CARD_REMOVE);
2617 host->ier |= present ? SDHCI_INT_CARD_REMOVE :
2618 SDHCI_INT_CARD_INSERT;
2619 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2620 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
41005003
RK		 2621
2622 sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT |
2623 SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
3560db8e
RK		 2624
2625 host->thread_isr |= intmask & (SDHCI_INT_CARD_INSERT |
2626 SDHCI_INT_CARD_REMOVE);
2627 result = IRQ_WAKE_THREAD;
41005003 2628 }
d129bceb 2629
41005003 2630 if (intmask & SDHCI_INT_CMD_MASK)
61541397
AH		 2631 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK,
2632 &intmask);
964f9ce2 2633
41005003
RK		 2634 if (intmask & SDHCI_INT_DATA_MASK)
2635 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
d129bceb 2636
41005003
RK		 2637 if (intmask & SDHCI_INT_BUS_POWER)
2638 pr_err("%s: Card is consuming too much power!\n",
2639 mmc_hostname(host->mmc));
3192a28f 2640
781e989c
RK		 2641 if (intmask & SDHCI_INT_CARD_INT) {
2642 sdhci_enable_sdio_irq_nolock(host, false);
2643 host->thread_isr |= SDHCI_INT_CARD_INT;
2644 result = IRQ_WAKE_THREAD;
2645 }
f75979b7 2646
41005003
RK		 2647 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE |
2648 SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |
2649 SDHCI_INT_ERROR | SDHCI_INT_BUS_POWER |
2650 SDHCI_INT_CARD_INT);
f75979b7 2651
41005003
RK		 2652 if (intmask) {
2653 unexpected |= intmask;
2654 sdhci_writel(host, intmask, SDHCI_INT_STATUS);
2655 }
d129bceb 2656
781e989c
RK		 2657 if (result == IRQ_NONE)
2658 result = IRQ_HANDLED;
d129bceb 2659
41005003 2660 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
41005003 2661 } while (intmask && --max_loops);
d129bceb
PO		 2662out:
2663 spin_unlock(&host->lock);
2664
6379b237
AS		 2665 if (unexpected) {
2666 pr_err("%s: Unexpected interrupt 0x%08x.\n",
2667 mmc_hostname(host->mmc), unexpected);
2668 sdhci_dumpregs(host);
2669 }
f75979b7 2670
d129bceb
PO		 2671 return result;
2672}
2673
781e989c
RK		 2674static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
2675{
2676 struct sdhci_host *host = dev_id;
2677 unsigned long flags;
2678 u32 isr;
2679
2680 spin_lock_irqsave(&host->lock, flags);
2681 isr = host->thread_isr;
2682 host->thread_isr = 0;
2683 spin_unlock_irqrestore(&host->lock, flags);
2684
3560db8e
RK		 2685 if (isr & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
2686 sdhci_card_event(host->mmc);
2687 mmc_detect_change(host->mmc, msecs_to_jiffies(200));
2688 }
2689
781e989c
RK		 2690 if (isr & SDHCI_INT_CARD_INT) {
2691 sdio_run_irqs(host->mmc);
2692
2693 spin_lock_irqsave(&host->lock, flags);
2694 if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
2695 sdhci_enable_sdio_irq_nolock(host, true);
2696 spin_unlock_irqrestore(&host->lock, flags);
2697 }
2698
2699 return isr ? IRQ_HANDLED : IRQ_NONE;
2700}
2701
d129bceb
PO		 2702/*****************************************************************************\
2703 * *
2704 * Suspend/resume *
2705 * *
2706\*****************************************************************************/
2707
2708#ifdef CONFIG_PM
ad080d79
KL		 2709void sdhci_enable_irq_wakeups(struct sdhci_host *host)
2710{
2711 u8 val;
2712 u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
2713 | SDHCI_WAKE_ON_INT;
2714
2715 val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
2716 val |= mask ;
2717 /* Avoid fake wake up */
2718 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
2719 val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE);
2720 sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
2721}
2722EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups);
2723
0b10f478 2724static void sdhci_disable_irq_wakeups(struct sdhci_host *host)
ad080d79
KL		 2725{
2726 u8 val;
2727 u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
2728 | SDHCI_WAKE_ON_INT;
2729
2730 val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
2731 val &= ~mask;
2732 sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
2733}
d129bceb 2734
29495aa0 2735int sdhci_suspend_host(struct sdhci_host *host)
d129bceb 2736{
7260cf5e
AV		 2737 sdhci_disable_card_detection(host);
2738
cf2b5eea 2739 /* Disable tuning since we are suspending */
973905fe 2740 if (host->flags & SDHCI_USING_RETUNING_TIMER) {
c6ced0db 2741 del_timer_sync(&host->tuning_timer);
cf2b5eea 2742 host->flags &= ~SDHCI_NEEDS_RETUNING;
cf2b5eea
AN		 2743 }
2744
ad080d79 2745 if (!device_may_wakeup(mmc_dev(host->mmc))) {
b537f94c
RK		 2746 host->ier = 0;
2747 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
2748 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
ad080d79
KL		 2749 free_irq(host->irq, host);
2750 } else {
2751 sdhci_enable_irq_wakeups(host);
2752 enable_irq_wake(host->irq);
2753 }
4ee14ec6 2754 return 0;
d129bceb
PO		 2755}
2756
b8c86fc5 2757EXPORT_SYMBOL_GPL(sdhci_suspend_host);
d129bceb 2758
b8c86fc5
PO		 2759int sdhci_resume_host(struct sdhci_host *host)
2760{
4ee14ec6 2761 int ret = 0;
d129bceb 2762
a13abc7b 2763 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
b8c86fc5
PO		 2764 if (host->ops->enable_dma)
2765 host->ops->enable_dma(host);
2766 }
d129bceb 2767
ad080d79 2768 if (!device_may_wakeup(mmc_dev(host->mmc))) {
781e989c
RK		 2769 ret = request_threaded_irq(host->irq, sdhci_irq,
2770 sdhci_thread_irq, IRQF_SHARED,
2771 mmc_hostname(host->mmc), host);
ad080d79
KL		 2772 if (ret)
2773 return ret;
2774 } else {
2775 sdhci_disable_irq_wakeups(host);
2776 disable_irq_wake(host->irq);
2777 }
d129bceb 2778
6308d290
AH		 2779 if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) &&
2780 (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) {
2781 /* Card keeps power but host controller does not */
2782 sdhci_init(host, 0);
2783 host->pwr = 0;
2784 host->clock = 0;
2785 sdhci_do_set_ios(host, &host->mmc->ios);
2786 } else {
2787 sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
2788 mmiowb();
2789 }
b8c86fc5 2790
7260cf5e
AV		 2791 sdhci_enable_card_detection(host);
2792
cf2b5eea 2793 /* Set the re-tuning expiration flag */
973905fe 2794 if (host->flags & SDHCI_USING_RETUNING_TIMER)
cf2b5eea
AN		 2795 host->flags |= SDHCI_NEEDS_RETUNING;
2796
2f4cbb3d 2797 return ret;
d129bceb
PO		 2798}
2799
b8c86fc5 2800EXPORT_SYMBOL_GPL(sdhci_resume_host);
66fd8ad5
AH		 2801
2802static int sdhci_runtime_pm_get(struct sdhci_host *host)
2803{
2804 return pm_runtime_get_sync(host->mmc->parent);
2805}
2806
2807static int sdhci_runtime_pm_put(struct sdhci_host *host)
2808{
2809 pm_runtime_mark_last_busy(host->mmc->parent);
2810 return pm_runtime_put_autosuspend(host->mmc->parent);
2811}
2812
f0710a55
AH		 2813static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
2814{
2815 if (host->runtime_suspended || host->bus_on)
2816 return;
2817 host->bus_on = true;
2818 pm_runtime_get_noresume(host->mmc->parent);
2819}
2820
2821static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
2822{
2823 if (host->runtime_suspended || !host->bus_on)
2824 return;
2825 host->bus_on = false;
2826 pm_runtime_put_noidle(host->mmc->parent);
2827}
2828
66fd8ad5
AH		 2829int sdhci_runtime_suspend_host(struct sdhci_host *host)
2830{
2831 unsigned long flags;
66fd8ad5
AH		 2832
2833 /* Disable tuning since we are suspending */
973905fe 2834 if (host->flags & SDHCI_USING_RETUNING_TIMER) {
66fd8ad5
AH		 2835 del_timer_sync(&host->tuning_timer);
2836 host->flags &= ~SDHCI_NEEDS_RETUNING;
2837 }
2838
2839 spin_lock_irqsave(&host->lock, flags);
b537f94c
RK		 2840 host->ier &= SDHCI_INT_CARD_INT;
2841 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2842 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
66fd8ad5
AH		 2843 spin_unlock_irqrestore(&host->lock, flags);
2844
781e989c 2845 synchronize_hardirq(host->irq);
66fd8ad5
AH		 2846
2847 spin_lock_irqsave(&host->lock, flags);
2848 host->runtime_suspended = true;
2849 spin_unlock_irqrestore(&host->lock, flags);
2850
8a125bad 2851 return 0;
66fd8ad5
AH		 2852}
2853EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
2854
2855int sdhci_runtime_resume_host(struct sdhci_host *host)
2856{
2857 unsigned long flags;
8a125bad 2858 int host_flags = host->flags;
66fd8ad5
AH		 2859
2860 if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
2861 if (host->ops->enable_dma)
2862 host->ops->enable_dma(host);
2863 }
2864
2865 sdhci_init(host, 0);
2866
2867 /* Force clock and power re-program */
2868 host->pwr = 0;
2869 host->clock = 0;
2870 sdhci_do_set_ios(host, &host->mmc->ios);
2871
2872 sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios);
52983382
KL		 2873 if ((host_flags & SDHCI_PV_ENABLED) &&
2874 !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
2875 spin_lock_irqsave(&host->lock, flags);
2876 sdhci_enable_preset_value(host, true);
2877 spin_unlock_irqrestore(&host->lock, flags);
2878 }
66fd8ad5
AH		 2879
2880 /* Set the re-tuning expiration flag */
973905fe 2881 if (host->flags & SDHCI_USING_RETUNING_TIMER)
66fd8ad5
AH		 2882 host->flags |= SDHCI_NEEDS_RETUNING;
2883
2884 spin_lock_irqsave(&host->lock, flags);
2885
2886 host->runtime_suspended = false;
2887
2888 /* Enable SDIO IRQ */
ef104333 2889 if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
66fd8ad5
AH		 2890 sdhci_enable_sdio_irq_nolock(host, true);
2891
2892 /* Enable Card Detection */
2893 sdhci_enable_card_detection(host);
2894
2895 spin_unlock_irqrestore(&host->lock, flags);
2896
8a125bad 2897 return 0;
66fd8ad5
AH		 2898}
2899EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host);
2900
162d6f98 2901#endif /* CONFIG_PM */
66fd8ad5 2902
d129bceb
PO		 2903/*****************************************************************************\
2904 * *
b8c86fc5 2905 * Device allocation/registration *
d129bceb
PO		 2906 * *
2907\*****************************************************************************/
2908
b8c86fc5
PO		 2909struct sdhci_host *sdhci_alloc_host(struct device *dev,
2910 size_t priv_size)
d129bceb 2911{
d129bceb
PO		 2912 struct mmc_host *mmc;
2913 struct sdhci_host *host;
2914
b8c86fc5 2915 WARN_ON(dev == NULL);
d129bceb 2916
b8c86fc5 2917 mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev);
d129bceb 2918 if (!mmc)
b8c86fc5 2919 return ERR_PTR(-ENOMEM);
d129bceb
PO		 2920
2921 host = mmc_priv(mmc);
2922 host->mmc = mmc;
2923
b8c86fc5
PO		 2924 return host;
2925}
8a4da143 2926
b8c86fc5 2927EXPORT_SYMBOL_GPL(sdhci_alloc_host);
d129bceb 2928
b8c86fc5
PO		 2929int sdhci_add_host(struct sdhci_host *host)
2930{
2931 struct mmc_host *mmc;
bd6a8c30 2932 u32 caps[2] = {0, 0};
f2119df6
AN		 2933 u32 max_current_caps;
2934 unsigned int ocr_avail;
f5fa92e5 2935 unsigned int override_timeout_clk;
b8c86fc5 2936 int ret;
d129bceb 2937
b8c86fc5
PO		 2938 WARN_ON(host == NULL);
2939 if (host == NULL)
2940 return -EINVAL;
d129bceb 2941
b8c86fc5 2942 mmc = host->mmc;
d129bceb 2943
b8c86fc5
PO		 2944 if (debug_quirks)
2945 host->quirks = debug_quirks;
66fd8ad5
AH		 2946 if (debug_quirks2)
2947 host->quirks2 = debug_quirks2;
d129bceb 2948
f5fa92e5
AH		 2949 override_timeout_clk = host->timeout_clk;
2950
03231f9b 2951 sdhci_do_reset(host, SDHCI_RESET_ALL);
d96649ed 2952
4e4141a5 2953 host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
2134a922
PO		 2954 host->version = (host->version & SDHCI_SPEC_VER_MASK)
2955 >> SDHCI_SPEC_VER_SHIFT;
85105c53 2956 if (host->version > SDHCI_SPEC_300) {
a3c76eb9 2957 pr_err("%s: Unknown controller version (%d). "
b69c9058 2958 "You may experience problems.\n", mmc_hostname(mmc),
2134a922 2959 host->version);
4a965505
PO		 2960 }
2961
f2119df6 2962 caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps :
ccc92c23 2963 sdhci_readl(host, SDHCI_CAPABILITIES);
d129bceb 2964
bd6a8c30
PR		 2965 if (host->version >= SDHCI_SPEC_300)
2966 caps[1] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ?
2967 host->caps1 :
2968 sdhci_readl(host, SDHCI_CAPABILITIES_1);
f2119df6 2969
b8c86fc5 2970 if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
a13abc7b 2971 host->flags |= SDHCI_USE_SDMA;
f2119df6 2972 else if (!(caps[0] & SDHCI_CAN_DO_SDMA))
a13abc7b 2973 DBG("Controller doesn't have SDMA capability\n");
67435274 2974 else
a13abc7b 2975 host->flags |= SDHCI_USE_SDMA;
d129bceb 2976
b8c86fc5 2977 if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
a13abc7b 2978 (host->flags & SDHCI_USE_SDMA)) {
cee687ce 2979 DBG("Disabling DMA as it is marked broken\n");
a13abc7b 2980 host->flags &= ~SDHCI_USE_SDMA;
7c168e3d
FT		 2981 }
2982
f2119df6
AN		 2983 if ((host->version >= SDHCI_SPEC_200) &&
2984 (caps[0] & SDHCI_CAN_DO_ADMA2))
a13abc7b 2985 host->flags |= SDHCI_USE_ADMA;
2134a922
PO		 2986
2987 if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
2988 (host->flags & SDHCI_USE_ADMA)) {
2989 DBG("Disabling ADMA as it is marked broken\n");
2990 host->flags &= ~SDHCI_USE_ADMA;
2991 }
2992
e57a5f61
AH		 2993 /*
2994 * It is assumed that a 64-bit capable device has set a 64-bit DMA mask
2995 * and *must* do 64-bit DMA. A driver has the opportunity to change
2996 * that during the first call to ->enable_dma(). Similarly
2997 * SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to
2998 * implement.
2999 */
3000 if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT)
3001 host->flags |= SDHCI_USE_64_BIT_DMA;
3002
a13abc7b 3003 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
b8c86fc5
PO		 3004 if (host->ops->enable_dma) {
3005 if (host->ops->enable_dma(host)) {
6606110d 3006 pr_warn("%s: No suitable DMA available - falling back to PIO\n",
b8c86fc5 3007 mmc_hostname(mmc));
a13abc7b
RR		 3008 host->flags &=
3009 ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA);
b8c86fc5 3010 }
d129bceb
PO		 3011 }
3012 }
3013
e57a5f61
AH		 3014 /* SDMA does not support 64-bit DMA */
3015 if (host->flags & SDHCI_USE_64_BIT_DMA)
3016 host->flags &= ~SDHCI_USE_SDMA;
3017
2134a922
PO		 3018 if (host->flags & SDHCI_USE_ADMA) {
3019 /*
76fe379a
AH		 3020 * The DMA descriptor table size is calculated as the maximum
3021 * number of segments times 2, to allow for an alignment
3022 * descriptor for each segment, plus 1 for a nop end descriptor,
3023 * all multipled by the descriptor size.
2134a922 3024 */
e57a5f61
AH		 3025 if (host->flags & SDHCI_USE_64_BIT_DMA) {
3026 host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) *
3027 SDHCI_ADMA2_64_DESC_SZ;
3028 host->align_buffer_sz = SDHCI_MAX_SEGS *
3029 SDHCI_ADMA2_64_ALIGN;
3030 host->desc_sz = SDHCI_ADMA2_64_DESC_SZ;
3031 host->align_sz = SDHCI_ADMA2_64_ALIGN;
3032 host->align_mask = SDHCI_ADMA2_64_ALIGN - 1;
3033 } else {
3034 host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) *
3035 SDHCI_ADMA2_32_DESC_SZ;
3036 host->align_buffer_sz = SDHCI_MAX_SEGS *
3037 SDHCI_ADMA2_32_ALIGN;
3038 host->desc_sz = SDHCI_ADMA2_32_DESC_SZ;
3039 host->align_sz = SDHCI_ADMA2_32_ALIGN;
3040 host->align_mask = SDHCI_ADMA2_32_ALIGN - 1;
3041 }
4efaa6fb 3042 host->adma_table = dma_alloc_coherent(mmc_dev(mmc),
76fe379a 3043 host->adma_table_sz,
4efaa6fb
AH		 3044 &host->adma_addr,
3045 GFP_KERNEL);
76fe379a 3046 host->align_buffer = kmalloc(host->align_buffer_sz, GFP_KERNEL);
4efaa6fb 3047 if (!host->adma_table || !host->align_buffer) {
76fe379a 3048 dma_free_coherent(mmc_dev(mmc), host->adma_table_sz,
4efaa6fb 3049 host->adma_table, host->adma_addr);
2134a922 3050 kfree(host->align_buffer);
6606110d 3051 pr_warn("%s: Unable to allocate ADMA buffers - falling back to standard DMA\n",
2134a922
PO		 3052 mmc_hostname(mmc));
3053 host->flags &= ~SDHCI_USE_ADMA;
4efaa6fb 3054 host->adma_table = NULL;
d1e49f77 3055 host->align_buffer = NULL;
76fe379a 3056 } else if (host->adma_addr & host->align_mask) {
6606110d
JP		 3057 pr_warn("%s: unable to allocate aligned ADMA descriptor\n",
3058 mmc_hostname(mmc));
d1e49f77 3059 host->flags &= ~SDHCI_USE_ADMA;
76fe379a 3060 dma_free_coherent(mmc_dev(mmc), host->adma_table_sz,
4efaa6fb 3061 host->adma_table, host->adma_addr);
d1e49f77 3062 kfree(host->align_buffer);
4efaa6fb 3063 host->adma_table = NULL;
d1e49f77 3064 host->align_buffer = NULL;
2134a922
PO		 3065 }
3066 }
3067
7659150c
PO		 3068 /*
3069 * If we use DMA, then it's up to the caller to set the DMA
3070 * mask, but PIO does not need the hw shim so we set a new
3071 * mask here in that case.
3072 */
a13abc7b 3073 if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) {
7659150c 3074 host->dma_mask = DMA_BIT_MASK(64);
4e743f1f 3075 mmc_dev(mmc)->dma_mask = &host->dma_mask;
7659150c 3076 }
d129bceb 3077
c4687d5f 3078 if (host->version >= SDHCI_SPEC_300)
f2119df6 3079 host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK)
c4687d5f
ZG		 3080 >> SDHCI_CLOCK_BASE_SHIFT;
3081 else
f2119df6 3082 host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK)
c4687d5f
ZG		 3083 >> SDHCI_CLOCK_BASE_SHIFT;
3084
4240ff0a 3085 host->max_clk *= 1000000;
f27f47ef
AV		 3086 if (host->max_clk == 0 || host->quirks &
3087 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) {
4240ff0a 3088 if (!host->ops->get_max_clock) {
a3c76eb9 3089 pr_err("%s: Hardware doesn't specify base clock "
4240ff0a
BD		 3090 "frequency.\n", mmc_hostname(mmc));
3091 return -ENODEV;
3092 }
3093 host->max_clk = host->ops->get_max_clock(host);
8ef1a143 3094 }
d129bceb 3095
348487cb 3096 host->next_data.cookie = 1;
c3ed3877
AN		 3097 /*
3098 * In case of Host Controller v3.00, find out whether clock
3099 * multiplier is supported.
3100 */
3101 host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >>
3102 SDHCI_CLOCK_MUL_SHIFT;
3103
3104 /*
3105 * In case the value in Clock Multiplier is 0, then programmable
3106 * clock mode is not supported, otherwise the actual clock
3107 * multiplier is one more than the value of Clock Multiplier
3108 * in the Capabilities Register.
3109 */
3110 if (host->clk_mul)
3111 host->clk_mul += 1;
3112
d129bceb
PO		 3113 /*
3114 * Set host parameters.
3115 */
3116 mmc->ops = &sdhci_ops;
c3ed3877 3117 mmc->f_max = host->max_clk;
ce5f036b 3118 if (host->ops->get_min_clock)
a9e58f25 3119 mmc->f_min = host->ops->get_min_clock(host);
c3ed3877
AN		 3120 else if (host->version >= SDHCI_SPEC_300) {
3121 if (host->clk_mul) {
3122 mmc->f_min = (host->max_clk * host->clk_mul) / 1024;
3123 mmc->f_max = host->max_clk * host->clk_mul;
3124 } else
3125 mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300;
3126 } else
0397526d 3127 mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200;
15ec4461 3128
28aab053
AD		 3129 if (!(host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) {
3130 host->timeout_clk = (caps[0] & SDHCI_TIMEOUT_CLK_MASK) >>
3131 SDHCI_TIMEOUT_CLK_SHIFT;
3132 if (host->timeout_clk == 0) {
3133 if (host->ops->get_timeout_clock) {
3134 host->timeout_clk =
3135 host->ops->get_timeout_clock(host);
3136 } else {
3137 pr_err("%s: Hardware doesn't specify timeout clock frequency.\n",
3138 mmc_hostname(mmc));
3139 return -ENODEV;
3140 }
272308ca 3141 }
272308ca 3142
28aab053
AD		 3143 if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT)
3144 host->timeout_clk *= 1000;
272308ca 3145
28aab053 3146 mmc->max_busy_timeout = host->ops->get_max_timeout_count ?
a6ff5aeb 3147 host->ops->get_max_timeout_count(host) : 1 << 27;
28aab053
AD		 3148 mmc->max_busy_timeout /= host->timeout_clk;
3149 }
58d1246d 3150
f5fa92e5
AH		 3151 if (override_timeout_clk)
3152 host->timeout_clk = override_timeout_clk;
3153
e89d456f 3154 mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
781e989c 3155 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
e89d456f
AW		 3156
3157 if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
3158 host->flags |= SDHCI_AUTO_CMD12;
5fe23c7f 3159
8edf6371 3160 /* Auto-CMD23 stuff only works in ADMA or PIO. */
4f3d3e9b 3161 if ((host->version >= SDHCI_SPEC_300) &&
8edf6371 3162 ((host->flags & SDHCI_USE_ADMA) ||
4f3d3e9b 3163 !(host->flags & SDHCI_USE_SDMA))) {
8edf6371
AW		 3164 host->flags |= SDHCI_AUTO_CMD23;
3165 DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));
3166 } else {
3167 DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc));
3168 }
3169
15ec4461
PR		 3170 /*
3171 * A controller may support 8-bit width, but the board itself
3172 * might not have the pins brought out. Boards that support
3173 * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in
3174 * their platform code before calling sdhci_add_host(), and we
3175 * won't assume 8-bit width for hosts without that CAP.
3176 */
5fe23c7f 3177 if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
15ec4461 3178 mmc->caps |= MMC_CAP_4_BIT_DATA;
d129bceb 3179
63ef5d8c
JH		 3180 if (host->quirks2 & SDHCI_QUIRK2_HOST_NO_CMD23)
3181 mmc->caps &= ~MMC_CAP_CMD23;
3182
f2119df6 3183 if (caps[0] & SDHCI_CAN_DO_HISPD)
a29e7e18 3184 mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
cd9277c0 3185
176d1ed4 3186 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
4e743f1f 3187 !(mmc->caps & MMC_CAP_NONREMOVABLE))
68d1fb7e
AV		 3188 mmc->caps |= MMC_CAP_NEEDS_POLL;
3189
3a48edc4
TK		 3190 /* If there are external regulators, get them */
3191 if (mmc_regulator_get_supply(mmc) == -EPROBE_DEFER)
3192 return -EPROBE_DEFER;
3193
6231f3de 3194 /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */
3a48edc4
TK		 3195 if (!IS_ERR(mmc->supply.vqmmc)) {
3196 ret = regulator_enable(mmc->supply.vqmmc);
3197 if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000,
3198 1950000))
8363c374
KL		 3199 caps[1] &= ~(SDHCI_SUPPORT_SDR104 |
3200 SDHCI_SUPPORT_SDR50 |
3201 SDHCI_SUPPORT_DDR50);
a3361aba
CB		 3202 if (ret) {
3203 pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
3204 mmc_hostname(mmc), ret);
4bb74313 3205 mmc->supply.vqmmc = ERR_PTR(-EINVAL);
a3361aba 3206 }
8363c374 3207 }
6231f3de 3208
6a66180a
DD		 3209 if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V)
3210 caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
3211 SDHCI_SUPPORT_DDR50);
3212
4188bba0
AC		 3213 /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
3214 if (caps[1] & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
3215 SDHCI_SUPPORT_DDR50))
f2119df6
AN		 3216 mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
3217
3218 /* SDR104 supports also implies SDR50 support */
156e14b1 3219 if (caps[1] & SDHCI_SUPPORT_SDR104) {
f2119df6 3220 mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
156e14b1
GC		 3221 /* SD3.0: SDR104 is supported so (for eMMC) the caps2
3222 * field can be promoted to support HS200.
3223 */
549c0b18 3224 if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200))
13868bf2 3225 mmc->caps2 |= MMC_CAP2_HS200;
156e14b1 3226 } else if (caps[1] & SDHCI_SUPPORT_SDR50)
f2119df6
AN		 3227 mmc->caps |= MMC_CAP_UHS_SDR50;
3228
e9fb05d5
AH		 3229 if (host->quirks2 & SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 &&
3230 (caps[1] & SDHCI_SUPPORT_HS400))
3231 mmc->caps2 |= MMC_CAP2_HS400;
3232
549c0b18
AH		 3233 if ((mmc->caps2 & MMC_CAP2_HSX00_1_2V) &&
3234 (IS_ERR(mmc->supply.vqmmc) ||
3235 !regulator_is_supported_voltage(mmc->supply.vqmmc, 1100000,
3236 1300000)))
3237 mmc->caps2 &= ~MMC_CAP2_HSX00_1_2V;
3238
9107ebbf
MC		 3239 if ((caps[1] & SDHCI_SUPPORT_DDR50) &&
3240 !(host->quirks2 & SDHCI_QUIRK2_BROKEN_DDR50))
f2119df6
AN		 3241 mmc->caps |= MMC_CAP_UHS_DDR50;
3242
069c9f14 3243 /* Does the host need tuning for SDR50? */
b513ea25
AN		 3244 if (caps[1] & SDHCI_USE_SDR50_TUNING)
3245 host->flags |= SDHCI_SDR50_NEEDS_TUNING;
3246
156e14b1 3247 /* Does the host need tuning for SDR104 / HS200? */
069c9f14 3248 if (mmc->caps2 & MMC_CAP2_HS200)
156e14b1 3249 host->flags |= SDHCI_SDR104_NEEDS_TUNING;
069c9f14 3250
d6d50a15
AN		 3251 /* Driver Type(s) (A, C, D) supported by the host */
3252 if (caps[1] & SDHCI_DRIVER_TYPE_A)
3253 mmc->caps |= MMC_CAP_DRIVER_TYPE_A;
3254 if (caps[1] & SDHCI_DRIVER_TYPE_C)
3255 mmc->caps |= MMC_CAP_DRIVER_TYPE_C;
3256 if (caps[1] & SDHCI_DRIVER_TYPE_D)
3257 mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
3258
cf2b5eea
AN		 3259 /* Initial value for re-tuning timer count */
3260 host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
3261 SDHCI_RETUNING_TIMER_COUNT_SHIFT;
3262
3263 /*
3264 * In case Re-tuning Timer is not disabled, the actual value of
3265 * re-tuning timer will be 2 ^ (n - 1).
3266 */
3267 if (host->tuning_count)
3268 host->tuning_count = 1 << (host->tuning_count - 1);
3269
3270 /* Re-tuning mode supported by the Host Controller */
3271 host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >>
3272 SDHCI_RETUNING_MODE_SHIFT;
3273
8f230f45 3274 ocr_avail = 0;
bad37e1a 3275
f2119df6
AN		 3276 /*
3277 * According to SD Host Controller spec v3.00, if the Host System
3278 * can afford more than 150mA, Host Driver should set XPC to 1. Also
3279 * the value is meaningful only if Voltage Support in the Capabilities
3280 * register is set. The actual current value is 4 times the register
3281 * value.
3282 */
3283 max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
3a48edc4 3284 if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) {
ae906037 3285 int curr = regulator_get_current_limit(mmc->supply.vmmc);
bad37e1a
PR		 3286 if (curr > 0) {
3287
3288 /* convert to SDHCI_MAX_CURRENT format */
3289 curr = curr/1000; /* convert to mA */
3290 curr = curr/SDHCI_MAX_CURRENT_MULTIPLIER;
3291
3292 curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
3293 max_current_caps =
3294 (curr << SDHCI_MAX_CURRENT_330_SHIFT) |
3295 (curr << SDHCI_MAX_CURRENT_300_SHIFT) |
3296 (curr << SDHCI_MAX_CURRENT_180_SHIFT);
3297 }
3298 }
f2119df6
AN		 3299
3300 if (caps[0] & SDHCI_CAN_VDD_330) {
8f230f45 3301 ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34;
f2119df6 3302
55c4665e 3303 mmc->max_current_330 = ((max_current_caps &
f2119df6
AN		 3304 SDHCI_MAX_CURRENT_330_MASK) >>
3305 SDHCI_MAX_CURRENT_330_SHIFT) *
3306 SDHCI_MAX_CURRENT_MULTIPLIER;
f2119df6
AN		 3307 }
3308 if (caps[0] & SDHCI_CAN_VDD_300) {
8f230f45 3309 ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31;
f2119df6 3310
55c4665e 3311 mmc->max_current_300 = ((max_current_caps &
f2119df6
AN		 3312 SDHCI_MAX_CURRENT_300_MASK) >>
3313 SDHCI_MAX_CURRENT_300_SHIFT) *
3314 SDHCI_MAX_CURRENT_MULTIPLIER;
f2119df6
AN		 3315 }
3316 if (caps[0] & SDHCI_CAN_VDD_180) {
8f230f45
TI		 3317 ocr_avail |= MMC_VDD_165_195;
3318
55c4665e 3319 mmc->max_current_180 = ((max_current_caps &
f2119df6
AN		 3320 SDHCI_MAX_CURRENT_180_MASK) >>
3321 SDHCI_MAX_CURRENT_180_SHIFT) *
3322 SDHCI_MAX_CURRENT_MULTIPLIER;
f2119df6
AN		 3323 }
3324
52221610 3325 /* If OCR set by external regulators, use it instead */
3a48edc4 3326 if (mmc->ocr_avail)
52221610 3327 ocr_avail = mmc->ocr_avail;
3a48edc4 3328
c0b887b6 3329 if (host->ocr_mask)
3a48edc4 3330 ocr_avail &= host->ocr_mask;
c0b887b6 3331
8f230f45
TI		 3332 mmc->ocr_avail = ocr_avail;
3333 mmc->ocr_avail_sdio = ocr_avail;
3334 if (host->ocr_avail_sdio)
3335 mmc->ocr_avail_sdio &= host->ocr_avail_sdio;
3336 mmc->ocr_avail_sd = ocr_avail;
3337 if (host->ocr_avail_sd)
3338 mmc->ocr_avail_sd &= host->ocr_avail_sd;
3339 else /* normal SD controllers don't support 1.8V */
3340 mmc->ocr_avail_sd &= ~MMC_VDD_165_195;
3341 mmc->ocr_avail_mmc = ocr_avail;
3342 if (host->ocr_avail_mmc)
3343 mmc->ocr_avail_mmc &= host->ocr_avail_mmc;
146ad66e
PO		 3344
3345 if (mmc->ocr_avail == 0) {
a3c76eb9 3346 pr_err("%s: Hardware doesn't report any "
b69c9058 3347 "support voltages.\n", mmc_hostname(mmc));
b8c86fc5 3348 return -ENODEV;
146ad66e
PO		 3349 }
3350
d129bceb
PO		 3351 spin_lock_init(&host->lock);
3352
3353 /*
2134a922
PO		 3354 * Maximum number of segments. Depends on if the hardware
3355 * can do scatter/gather or not.
d129bceb 3356 */
2134a922 3357 if (host->flags & SDHCI_USE_ADMA)
4fb213f8 3358 mmc->max_segs = SDHCI_MAX_SEGS;
a13abc7b 3359 else if (host->flags & SDHCI_USE_SDMA)
a36274e0 3360 mmc->max_segs = 1;
2134a922 3361 else /* PIO */
4fb213f8 3362 mmc->max_segs = SDHCI_MAX_SEGS;
d129bceb
PO		 3363
3364 /*
ac00531d
AH		 3365 * Maximum number of sectors in one transfer. Limited by SDMA boundary
3366 * size (512KiB). Note some tuning modes impose a 4MiB limit, but this
3367 * is less anyway.
d129bceb 3368 */
55db890a 3369 mmc->max_req_size = 524288;
d129bceb
PO		 3370
3371 /*
3372 * Maximum segment size. Could be one segment with the maximum number
2134a922
PO		 3373 * of bytes. When doing hardware scatter/gather, each entry cannot
3374 * be larger than 64 KiB though.
d129bceb 3375 */
30652aa3
OJ		 3376 if (host->flags & SDHCI_USE_ADMA) {
3377 if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC)
3378 mmc->max_seg_size = 65535;
3379 else
3380 mmc->max_seg_size = 65536;
3381 } else {
2134a922 3382 mmc->max_seg_size = mmc->max_req_size;
30652aa3 3383 }
d129bceb 3384
fe4a3c7a
PO		 3385 /*
3386 * Maximum block size. This varies from controller to controller and
3387 * is specified in the capabilities register.
3388 */
0633f654
AV		 3389 if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
3390 mmc->max_blk_size = 2;
3391 } else {
f2119df6 3392 mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >>
0633f654
AV		 3393 SDHCI_MAX_BLOCK_SHIFT;
3394 if (mmc->max_blk_size >= 3) {
6606110d
JP		 3395 pr_warn("%s: Invalid maximum block size, assuming 512 bytes\n",
3396 mmc_hostname(mmc));
0633f654
AV		 3397 mmc->max_blk_size = 0;
3398 }
3399 }
3400
3401 mmc->max_blk_size = 512 << mmc->max_blk_size;
fe4a3c7a 3402
55db890a
PO		 3403 /*
3404 * Maximum block count.
3405 */
1388eefd 3406 mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
55db890a 3407
d129bceb
PO		 3408 /*
3409 * Init tasklets.
3410 */
d129bceb
PO		 3411 tasklet_init(&host->finish_tasklet,
3412 sdhci_tasklet_finish, (unsigned long)host);
3413
e4cad1b5 3414 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
d129bceb 3415
250fb7b4 3416 init_waitqueue_head(&host->buf_ready_int);
b513ea25 3417
250fb7b4 3418 if (host->version >= SDHCI_SPEC_300) {
cf2b5eea
AN		 3419 /* Initialize re-tuning timer */
3420 init_timer(&host->tuning_timer);
3421 host->tuning_timer.data = (unsigned long)host;
3422 host->tuning_timer.function = sdhci_tuning_timer;
3423 }
3424
2af502ca
SG		 3425 sdhci_init(host, 0);
3426
781e989c
RK		 3427 ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq,
3428 IRQF_SHARED, mmc_hostname(mmc), host);
0fc81ee3
MB		 3429 if (ret) {
3430 pr_err("%s: Failed to request IRQ %d: %d\n",
3431 mmc_hostname(mmc), host->irq, ret);
8ef1a143 3432 goto untasklet;
0fc81ee3 3433 }
d129bceb 3434
d129bceb
PO		 3435#ifdef CONFIG_MMC_DEBUG
3436 sdhci_dumpregs(host);
3437#endif
3438
f9134319 3439#ifdef SDHCI_USE_LEDS_CLASS
5dbace0c
HS		 3440 snprintf(host->led_name, sizeof(host->led_name),
3441 "%s::", mmc_hostname(mmc));
3442 host->led.name = host->led_name;
2f730fec
PO		 3443 host->led.brightness = LED_OFF;
3444 host->led.default_trigger = mmc_hostname(mmc);
3445 host->led.brightness_set = sdhci_led_control;
3446
b8c86fc5 3447 ret = led_classdev_register(mmc_dev(mmc), &host->led);
0fc81ee3
MB		 3448 if (ret) {
3449 pr_err("%s: Failed to register LED device: %d\n",
3450 mmc_hostname(mmc), ret);
2f730fec 3451 goto reset;
0fc81ee3 3452 }
2f730fec
PO		 3453#endif
3454
5f25a66f
PO		 3455 mmiowb();
3456
d129bceb
PO		 3457 mmc_add_host(mmc);
3458
a3c76eb9 3459 pr_info("%s: SDHCI controller on %s [%s] using %s\n",
d1b26863 3460 mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
e57a5f61
AH		 3461 (host->flags & SDHCI_USE_ADMA) ?
3462 (host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" :
a13abc7b 3463 (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
d129bceb 3464
7260cf5e
AV		 3465 sdhci_enable_card_detection(host);
3466
d129bceb
PO		 3467 return 0;
3468
f9134319 3469#ifdef SDHCI_USE_LEDS_CLASS
2f730fec 3470reset:
03231f9b 3471 sdhci_do_reset(host, SDHCI_RESET_ALL);
b537f94c
RK		 3472 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
3473 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
2f730fec
PO		 3474 free_irq(host->irq, host);
3475#endif
8ef1a143 3476untasklet:
d129bceb 3477 tasklet_kill(&host->finish_tasklet);
d129bceb
PO		 3478
3479 return ret;
3480}
3481
b8c86fc5 3482EXPORT_SYMBOL_GPL(sdhci_add_host);
d129bceb 3483
1e72859e 3484void sdhci_remove_host(struct sdhci_host *host, int dead)
b8c86fc5 3485{
3a48edc4 3486 struct mmc_host *mmc = host->mmc;
1e72859e
PO		 3487 unsigned long flags;
3488
3489 if (dead) {
3490 spin_lock_irqsave(&host->lock, flags);
3491
3492 host->flags |= SDHCI_DEVICE_DEAD;
3493
3494 if (host->mrq) {
a3c76eb9 3495 pr_err("%s: Controller removed during "
4e743f1f 3496 " transfer!\n", mmc_hostname(mmc));
1e72859e
PO		 3497
3498 host->mrq->cmd->error = -ENOMEDIUM;
3499 tasklet_schedule(&host->finish_tasklet);
3500 }
3501
3502 spin_unlock_irqrestore(&host->lock, flags);
3503 }
3504
7260cf5e
AV		 3505 sdhci_disable_card_detection(host);
3506
4e743f1f 3507 mmc_remove_host(mmc);
d129bceb 3508
f9134319 3509#ifdef SDHCI_USE_LEDS_CLASS
2f730fec
PO		 3510 led_classdev_unregister(&host->led);
3511#endif
3512
1e72859e 3513 if (!dead)
03231f9b 3514 sdhci_do_reset(host, SDHCI_RESET_ALL);
d129bceb 3515
b537f94c
RK		 3516 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
3517 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
d129bceb
PO		 3518 free_irq(host->irq, host);
3519
3520 del_timer_sync(&host->timer);
3521
d129bceb 3522 tasklet_kill(&host->finish_tasklet);
2134a922 3523
3a48edc4
TK		 3524 if (!IS_ERR(mmc->supply.vqmmc))
3525 regulator_disable(mmc->supply.vqmmc);
6231f3de 3526
4efaa6fb 3527 if (host->adma_table)
76fe379a 3528 dma_free_coherent(mmc_dev(mmc), host->adma_table_sz,
4efaa6fb 3529 host->adma_table, host->adma_addr);
2134a922
PO		 3530 kfree(host->align_buffer);
3531
4efaa6fb 3532 host->adma_table = NULL;
2134a922 3533 host->align_buffer = NULL;
d129bceb
PO		 3534}
3535
b8c86fc5 3536EXPORT_SYMBOL_GPL(sdhci_remove_host);
d129bceb 3537
b8c86fc5 3538void sdhci_free_host(struct sdhci_host *host)
d129bceb 3539{
b8c86fc5 3540 mmc_free_host(host->mmc);
d129bceb
PO		 3541}
3542
b8c86fc5 3543EXPORT_SYMBOL_GPL(sdhci_free_host);
d129bceb
PO		 3544
3545/*****************************************************************************\
3546 * *
3547 * Driver init/exit *
3548 * *
3549\*****************************************************************************/
3550
3551static int __init sdhci_drv_init(void)
3552{
a3c76eb9 3553 pr_info(DRIVER_NAME
52fbf9c9 3554 ": Secure Digital Host Controller Interface driver\n");
a3c76eb9 3555 pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
d129bceb 3556
b8c86fc5 3557 return 0;
d129bceb
PO		 3558}
3559
3560static void __exit sdhci_drv_exit(void)
3561{
d129bceb
PO		 3562}
3563
3564module_init(sdhci_drv_init);
3565module_exit(sdhci_drv_exit);
3566
df673b22 3567module_param(debug_quirks, uint, 0444);
66fd8ad5 3568module_param(debug_quirks2, uint, 0444);
67435274 3569
32710e8f 3570MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
b8c86fc5 3571MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
d129bceb 3572MODULE_LICENSE("GPL");
67435274 3573
df673b22 3574MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
66fd8ad5 3575MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks.");
Linux 6.x block layer and io_uring tree(s)