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Linux 4.9-rc7
[mirror_ubuntu-artful-kernel.git] / drivers / mmc / host / sdhci.c
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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>
85cc1c33 31#include <linux/mmc/sdio.h>
bec9d4e5 32#include <linux/mmc/slot-gpio.h>
d129bceb 33
d129bceb
PO		 34#include "sdhci.h"
35
36#define DRIVER_NAME "sdhci"
d129bceb 37
d129bceb 38#define DBG(f, x...) \
c6563178 39 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
d129bceb 40
b513ea25
AN		 41#define MAX_TUNING_LOOP 40
42
df673b22 43static unsigned int debug_quirks = 0;
66fd8ad5 44static unsigned int debug_quirks2;
67435274 45
d129bceb
PO		 46static void sdhci_finish_data(struct sdhci_host *);
47
52983382 48static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
d129bceb
PO		 49
50static void sdhci_dumpregs(struct sdhci_host *host)
51{
a7c53671
CD		 52 pr_err(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n",
53 mmc_hostname(host->mmc));
d129bceb 54
a7c53671
CD		 55 pr_err(DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
56 sdhci_readl(host, SDHCI_DMA_ADDRESS),
57 sdhci_readw(host, SDHCI_HOST_VERSION));
58 pr_err(DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
59 sdhci_readw(host, SDHCI_BLOCK_SIZE),
60 sdhci_readw(host, SDHCI_BLOCK_COUNT));
61 pr_err(DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
62 sdhci_readl(host, SDHCI_ARGUMENT),
63 sdhci_readw(host, SDHCI_TRANSFER_MODE));
64 pr_err(DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
65 sdhci_readl(host, SDHCI_PRESENT_STATE),
66 sdhci_readb(host, SDHCI_HOST_CONTROL));
67 pr_err(DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
68 sdhci_readb(host, SDHCI_POWER_CONTROL),
69 sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL));
70 pr_err(DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
71 sdhci_readb(host, SDHCI_WAKE_UP_CONTROL),
72 sdhci_readw(host, SDHCI_CLOCK_CONTROL));
73 pr_err(DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
74 sdhci_readb(host, SDHCI_TIMEOUT_CONTROL),
75 sdhci_readl(host, SDHCI_INT_STATUS));
76 pr_err(DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
77 sdhci_readl(host, SDHCI_INT_ENABLE),
78 sdhci_readl(host, SDHCI_SIGNAL_ENABLE));
79 pr_err(DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
80 sdhci_readw(host, SDHCI_ACMD12_ERR),
81 sdhci_readw(host, SDHCI_SLOT_INT_STATUS));
82 pr_err(DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n",
83 sdhci_readl(host, SDHCI_CAPABILITIES),
84 sdhci_readl(host, SDHCI_CAPABILITIES_1));
85 pr_err(DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n",
86 sdhci_readw(host, SDHCI_COMMAND),
87 sdhci_readl(host, SDHCI_MAX_CURRENT));
88 pr_err(DRIVER_NAME ": Host ctl2: 0x%08x\n",
89 sdhci_readw(host, SDHCI_HOST_CONTROL2));
d129bceb 90
e57a5f61
AH		 91 if (host->flags & SDHCI_USE_ADMA) {
92 if (host->flags & SDHCI_USE_64_BIT_DMA)
a7c53671
CD		 93 pr_err(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x%08x\n",
94 readl(host->ioaddr + SDHCI_ADMA_ERROR),
95 readl(host->ioaddr + SDHCI_ADMA_ADDRESS_HI),
96 readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
e57a5f61 97 else
a7c53671
CD		 98 pr_err(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
99 readl(host->ioaddr + SDHCI_ADMA_ERROR),
100 readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
e57a5f61 101 }
be3f4ae0 102
a7c53671 103 pr_err(DRIVER_NAME ": ===========================================\n");
d129bceb
PO		 104}
105
106/*****************************************************************************\
107 * *
108 * Low level functions *
109 * *
110\*****************************************************************************/
111
56a590dc
AH		 112static inline bool sdhci_data_line_cmd(struct mmc_command *cmd)
113{
114 return cmd->data || cmd->flags & MMC_RSP_BUSY;
115}
116
7260cf5e
AV		 117static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
118{
5b4f1f6c 119 u32 present;
7260cf5e 120
c79396c1 121 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
860951c5 122 !mmc_card_is_removable(host->mmc))
66fd8ad5
AH		 123 return;
124
5b4f1f6c
RK		 125 if (enable) {
126 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
127 SDHCI_CARD_PRESENT;
d25928d1 128
5b4f1f6c
RK		 129 host->ier |= present ? SDHCI_INT_CARD_REMOVE :
130 SDHCI_INT_CARD_INSERT;
131 } else {
132 host->ier &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
133 }
b537f94c
RK		 134
135 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
136 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
7260cf5e
AV		 137}
138
139static void sdhci_enable_card_detection(struct sdhci_host *host)
140{
141 sdhci_set_card_detection(host, true);
142}
143
144static void sdhci_disable_card_detection(struct sdhci_host *host)
145{
146 sdhci_set_card_detection(host, false);
147}
148
02d0b685
UH		 149static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
150{
151 if (host->bus_on)
152 return;
153 host->bus_on = true;
154 pm_runtime_get_noresume(host->mmc->parent);
155}
156
157static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
158{
159 if (!host->bus_on)
160 return;
161 host->bus_on = false;
162 pm_runtime_put_noidle(host->mmc->parent);
163}
164
03231f9b 165void sdhci_reset(struct sdhci_host *host, u8 mask)
d129bceb 166{
e16514d8 167 unsigned long timeout;
393c1a34 168
4e4141a5 169 sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
d129bceb 170
f0710a55 171 if (mask & SDHCI_RESET_ALL) {
d129bceb 172 host->clock = 0;
f0710a55
AH		 173 /* Reset-all turns off SD Bus Power */
174 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
175 sdhci_runtime_pm_bus_off(host);
176 }
d129bceb 177
e16514d8
PO		 178 /* Wait max 100 ms */
179 timeout = 100;
180
181 /* hw clears the bit when it's done */
4e4141a5 182 while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
e16514d8 183 if (timeout == 0) {
a3c76eb9 184 pr_err("%s: Reset 0x%x never completed.\n",
e16514d8
PO		 185 mmc_hostname(host->mmc), (int)mask);
186 sdhci_dumpregs(host);
187 return;
188 }
189 timeout--;
190 mdelay(1);
d129bceb 191 }
03231f9b
RK		 192}
193EXPORT_SYMBOL_GPL(sdhci_reset);
194
195static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
196{
197 if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
d3940f27
AH		 198 struct mmc_host *mmc = host->mmc;
199
200 if (!mmc->ops->get_cd(mmc))
03231f9b
RK		 201 return;
202 }
063a9dbb 203
03231f9b 204 host->ops->reset(host, mask);
393c1a34 205
da91a8f9
RK		 206 if (mask & SDHCI_RESET_ALL) {
207 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
208 if (host->ops->enable_dma)
209 host->ops->enable_dma(host);
210 }
211
212 /* Resetting the controller clears many */
213 host->preset_enabled = false;
3abc1e80 214 }
d129bceb
PO		 215}
216
2f4cbb3d 217static void sdhci_init(struct sdhci_host *host, int soft)
d129bceb 218{
d3940f27
AH		 219 struct mmc_host *mmc = host->mmc;
220
2f4cbb3d 221 if (soft)
03231f9b 222 sdhci_do_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
2f4cbb3d 223 else
03231f9b 224 sdhci_do_reset(host, SDHCI_RESET_ALL);
d129bceb 225
b537f94c
RK		 226 host->ier = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
227 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT |
228 SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC |
229 SDHCI_INT_TIMEOUT | SDHCI_INT_DATA_END |
230 SDHCI_INT_RESPONSE;
231
f37b20eb
DA		 232 if (host->tuning_mode == SDHCI_TUNING_MODE_2 ||
233 host->tuning_mode == SDHCI_TUNING_MODE_3)
234 host->ier |= SDHCI_INT_RETUNE;
235
b537f94c
RK		 236 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
237 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
2f4cbb3d
NP		 238
239 if (soft) {
240 /* force clock reconfiguration */
241 host->clock = 0;
d3940f27 242 mmc->ops->set_ios(mmc, &mmc->ios);
2f4cbb3d 243 }
7260cf5e 244}
d129bceb 245
7260cf5e
AV		 246static void sdhci_reinit(struct sdhci_host *host)
247{
2f4cbb3d 248 sdhci_init(host, 0);
7260cf5e 249 sdhci_enable_card_detection(host);
d129bceb
PO		 250}
251
061d17a6 252static void __sdhci_led_activate(struct sdhci_host *host)
d129bceb
PO		 253{
254 u8 ctrl;
255
4e4141a5 256 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 257 ctrl |= SDHCI_CTRL_LED;
4e4141a5 258 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 259}
260
061d17a6 261static void __sdhci_led_deactivate(struct sdhci_host *host)
d129bceb
PO		 262{
263 u8 ctrl;
264
4e4141a5 265 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
d129bceb 266 ctrl &= ~SDHCI_CTRL_LED;
4e4141a5 267 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d129bceb
PO		 268}
269
4f78230f 270#if IS_REACHABLE(CONFIG_LEDS_CLASS)
2f730fec 271static void sdhci_led_control(struct led_classdev *led,
061d17a6 272 enum led_brightness brightness)
2f730fec
PO		 273{
274 struct sdhci_host *host = container_of(led, struct sdhci_host, led);
275 unsigned long flags;
276
277 spin_lock_irqsave(&host->lock, flags);
278
66fd8ad5
AH		 279 if (host->runtime_suspended)
280 goto out;
281
2f730fec 282 if (brightness == LED_OFF)
061d17a6 283 __sdhci_led_deactivate(host);
2f730fec 284 else
061d17a6 285 __sdhci_led_activate(host);
66fd8ad5 286out:
2f730fec
PO		 287 spin_unlock_irqrestore(&host->lock, flags);
288}
061d17a6
AH		 289
290static int sdhci_led_register(struct sdhci_host *host)
291{
292 struct mmc_host *mmc = host->mmc;
293
294 snprintf(host->led_name, sizeof(host->led_name),
295 "%s::", mmc_hostname(mmc));
296
297 host->led.name = host->led_name;
298 host->led.brightness = LED_OFF;
299 host->led.default_trigger = mmc_hostname(mmc);
300 host->led.brightness_set = sdhci_led_control;
301
302 return led_classdev_register(mmc_dev(mmc), &host->led);
303}
304
305static void sdhci_led_unregister(struct sdhci_host *host)
306{
307 led_classdev_unregister(&host->led);
308}
309
310static inline void sdhci_led_activate(struct sdhci_host *host)
311{
312}
313
314static inline void sdhci_led_deactivate(struct sdhci_host *host)
315{
316}
317
318#else
319
320static inline int sdhci_led_register(struct sdhci_host *host)
321{
322 return 0;
323}
324
325static inline void sdhci_led_unregister(struct sdhci_host *host)
326{
327}
328
329static inline void sdhci_led_activate(struct sdhci_host *host)
330{
331 __sdhci_led_activate(host);
332}
333
334static inline void sdhci_led_deactivate(struct sdhci_host *host)
335{
336 __sdhci_led_deactivate(host);
337}
338
2f730fec
PO		 339#endif
340
d129bceb
PO		 341/*****************************************************************************\
342 * *
343 * Core functions *
344 * *
345\*****************************************************************************/
346
a406f5a3 347static void sdhci_read_block_pio(struct sdhci_host *host)
d129bceb 348{
7659150c
PO		 349 unsigned long flags;
350 size_t blksize, len, chunk;
7244b85b 351 u32 uninitialized_var(scratch);
7659150c 352 u8 *buf;
d129bceb 353
a406f5a3 354 DBG("PIO reading\n");
d129bceb 355
a406f5a3 356 blksize = host->data->blksz;
7659150c 357 chunk = 0;
d129bceb 358
7659150c 359 local_irq_save(flags);
d129bceb 360
a406f5a3 361 while (blksize) {
bf3a35ac 362 BUG_ON(!sg_miter_next(&host->sg_miter));
d129bceb 363
7659150c 364 len = min(host->sg_miter.length, blksize);
d129bceb 365
7659150c
PO		 366 blksize -= len;
367 host->sg_miter.consumed = len;
14d836e7 368
7659150c 369 buf = host->sg_miter.addr;
d129bceb 370
7659150c
PO		 371 while (len) {
372 if (chunk == 0) {
4e4141a5 373 scratch = sdhci_readl(host, SDHCI_BUFFER);
7659150c 374 chunk = 4;
a406f5a3 375 }
7659150c
PO		 376
377 *buf = scratch & 0xFF;
378
379 buf++;
380 scratch >>= 8;
381 chunk--;
382 len--;
d129bceb 383 }
a406f5a3 384 }
7659150c
PO		 385
386 sg_miter_stop(&host->sg_miter);
387
388 local_irq_restore(flags);
a406f5a3 389}
d129bceb 390
a406f5a3
PO		 391static void sdhci_write_block_pio(struct sdhci_host *host)
392{
7659150c
PO		 393 unsigned long flags;
394 size_t blksize, len, chunk;
395 u32 scratch;
396 u8 *buf;
d129bceb 397
a406f5a3
PO		 398 DBG("PIO writing\n");
399
400 blksize = host->data->blksz;
7659150c
PO		 401 chunk = 0;
402 scratch = 0;
d129bceb 403
7659150c 404 local_irq_save(flags);
d129bceb 405
a406f5a3 406 while (blksize) {
bf3a35ac 407 BUG_ON(!sg_miter_next(&host->sg_miter));
a406f5a3 408
7659150c
PO		 409 len = min(host->sg_miter.length, blksize);
410
411 blksize -= len;
412 host->sg_miter.consumed = len;
413
414 buf = host->sg_miter.addr;
d129bceb 415
7659150c
PO		 416 while (len) {
417 scratch |= (u32)*buf << (chunk * 8);
418
419 buf++;
420 chunk++;
421 len--;
422
423 if ((chunk == 4) || ((len == 0) && (blksize == 0))) {
4e4141a5 424 sdhci_writel(host, scratch, SDHCI_BUFFER);
7659150c
PO		 425 chunk = 0;
426 scratch = 0;
d129bceb 427 }
d129bceb
PO		 428 }
429 }
7659150c
PO		 430
431 sg_miter_stop(&host->sg_miter);
432
433 local_irq_restore(flags);
a406f5a3
PO		 434}
435
436static void sdhci_transfer_pio(struct sdhci_host *host)
437{
438 u32 mask;
439
7659150c 440 if (host->blocks == 0)
a406f5a3
PO		 441 return;
442
443 if (host->data->flags & MMC_DATA_READ)
444 mask = SDHCI_DATA_AVAILABLE;
445 else
446 mask = SDHCI_SPACE_AVAILABLE;
447
4a3cba32
PO		 448 /*
449 * Some controllers (JMicron JMB38x) mess up the buffer bits
450 * for transfers < 4 bytes. As long as it is just one block,
451 * we can ignore the bits.
452 */
453 if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) &&
454 (host->data->blocks == 1))
455 mask = ~0;
456
4e4141a5 457 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
3e3bf207
AV		 458 if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY)
459 udelay(100);
460
a406f5a3
PO		 461 if (host->data->flags & MMC_DATA_READ)
462 sdhci_read_block_pio(host);
463 else
464 sdhci_write_block_pio(host);
d129bceb 465
7659150c
PO		 466 host->blocks--;
467 if (host->blocks == 0)
a406f5a3 468 break;
a406f5a3 469 }
d129bceb 470
a406f5a3 471 DBG("PIO transfer complete.\n");
d129bceb
PO		 472}
473
48857d9b 474static int sdhci_pre_dma_transfer(struct sdhci_host *host,
c0999b72 475 struct mmc_data *data, int cookie)
48857d9b
RK		 476{
477 int sg_count;
478
94538e51
RK		 479 /*
480 * If the data buffers are already mapped, return the previous
481 * dma_map_sg() result.
482 */
483 if (data->host_cookie == COOKIE_PRE_MAPPED)
48857d9b 484 return data->sg_count;
48857d9b
RK		 485
486 sg_count = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
487 data->flags & MMC_DATA_WRITE ?
488 DMA_TO_DEVICE : DMA_FROM_DEVICE);
489
490 if (sg_count == 0)
491 return -ENOSPC;
492
493 data->sg_count = sg_count;
c0999b72 494 data->host_cookie = cookie;
48857d9b
RK		 495
496 return sg_count;
497}
498
2134a922
PO		 499static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
500{
501 local_irq_save(*flags);
482fce99 502 return kmap_atomic(sg_page(sg)) + sg->offset;
2134a922
PO		 503}
504
505static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
506{
482fce99 507 kunmap_atomic(buffer);
2134a922
PO		 508 local_irq_restore(*flags);
509}
510
e57a5f61
AH		 511static void sdhci_adma_write_desc(struct sdhci_host *host, void *desc,
512 dma_addr_t addr, int len, unsigned cmd)
118cd17d 513{
e57a5f61 514 struct sdhci_adma2_64_desc *dma_desc = desc;
118cd17d 515
e57a5f61 516 /* 32-bit and 64-bit descriptors have these members in same position */
0545230f
AH		 517 dma_desc->cmd = cpu_to_le16(cmd);
518 dma_desc->len = cpu_to_le16(len);
e57a5f61
AH		 519 dma_desc->addr_lo = cpu_to_le32((u32)addr);
520
521 if (host->flags & SDHCI_USE_64_BIT_DMA)
522 dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32);
118cd17d
BD		 523}
524
b5ffa674
AH		 525static void sdhci_adma_mark_end(void *desc)
526{
e57a5f61 527 struct sdhci_adma2_64_desc *dma_desc = desc;
b5ffa674 528
e57a5f61 529 /* 32-bit and 64-bit descriptors have 'cmd' in same position */
0545230f 530 dma_desc->cmd |= cpu_to_le16(ADMA2_END);
b5ffa674
AH		 531}
532
60c64762
RK		 533static void sdhci_adma_table_pre(struct sdhci_host *host,
534 struct mmc_data *data, int sg_count)
2134a922 535{
2134a922 536 struct scatterlist *sg;
2134a922 537 unsigned long flags;
acc3ad13
RK		 538 dma_addr_t addr, align_addr;
539 void *desc, *align;
540 char *buffer;
541 int len, offset, i;
2134a922
PO		 542
543 /*
544 * The spec does not specify endianness of descriptor table.
545 * We currently guess that it is LE.
546 */
547
60c64762 548 host->sg_count = sg_count;
2134a922 549
4efaa6fb 550 desc = host->adma_table;
2134a922
PO		 551 align = host->align_buffer;
552
553 align_addr = host->align_addr;
554
555 for_each_sg(data->sg, sg, host->sg_count, i) {
556 addr = sg_dma_address(sg);
557 len = sg_dma_len(sg);
558
559 /*
acc3ad13
RK		 560 * The SDHCI specification states that ADMA addresses must
561 * be 32-bit aligned. If they aren't, then we use a bounce
562 * buffer for the (up to three) bytes that screw up the
2134a922
PO		 563 * alignment.
564 */
04a5ae6f
AH		 565 offset = (SDHCI_ADMA2_ALIGN - (addr & SDHCI_ADMA2_MASK)) &
566 SDHCI_ADMA2_MASK;
2134a922
PO		 567 if (offset) {
568 if (data->flags & MMC_DATA_WRITE) {
569 buffer = sdhci_kmap_atomic(sg, &flags);
570 memcpy(align, buffer, offset);
571 sdhci_kunmap_atomic(buffer, &flags);
572 }
573
118cd17d 574 /* tran, valid */
e57a5f61 575 sdhci_adma_write_desc(host, desc, align_addr, offset,
739d46dc 576 ADMA2_TRAN_VALID);
2134a922
PO		 577
578 BUG_ON(offset > 65536);
579
04a5ae6f
AH		 580 align += SDHCI_ADMA2_ALIGN;
581 align_addr += SDHCI_ADMA2_ALIGN;
2134a922 582
76fe379a 583 desc += host->desc_sz;
2134a922
PO		 584
585 addr += offset;
586 len -= offset;
587 }
588
2134a922
PO		 589 BUG_ON(len > 65536);
590
347ea32d
AH		 591 if (len) {
592 /* tran, valid */
593 sdhci_adma_write_desc(host, desc, addr, len,
594 ADMA2_TRAN_VALID);
595 desc += host->desc_sz;
596 }
2134a922
PO		 597
598 /*
599 * If this triggers then we have a calculation bug
600 * somewhere. :/
601 */
76fe379a 602 WARN_ON((desc - host->adma_table) >= host->adma_table_sz);
2134a922
PO		 603 }
604
70764a90 605 if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) {
acc3ad13 606 /* Mark the last descriptor as the terminating descriptor */
4efaa6fb 607 if (desc != host->adma_table) {
76fe379a 608 desc -= host->desc_sz;
b5ffa674 609 sdhci_adma_mark_end(desc);
70764a90
TA		 610 }
611 } else {
acc3ad13 612 /* Add a terminating entry - nop, end, valid */
e57a5f61 613 sdhci_adma_write_desc(host, desc, 0, 0, ADMA2_NOP_END_VALID);
70764a90 614 }
2134a922
PO		 615}
616
617static void sdhci_adma_table_post(struct sdhci_host *host,
618 struct mmc_data *data)
619{
2134a922
PO		 620 struct scatterlist *sg;
621 int i, size;
1c3d5f6d 622 void *align;
2134a922
PO		 623 char *buffer;
624 unsigned long flags;
625
47fa9613
RK		 626 if (data->flags & MMC_DATA_READ) {
627 bool has_unaligned = false;
de0b65a7 628
47fa9613
RK		 629 /* Do a quick scan of the SG list for any unaligned mappings */
630 for_each_sg(data->sg, sg, host->sg_count, i)
631 if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) {
632 has_unaligned = true;
633 break;
634 }
2134a922 635
47fa9613
RK		 636 if (has_unaligned) {
637 dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg,
f55c98f7 638 data->sg_len, DMA_FROM_DEVICE);
2134a922 639
47fa9613 640 align = host->align_buffer;
2134a922 641
47fa9613
RK		 642 for_each_sg(data->sg, sg, host->sg_count, i) {
643 if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) {
644 size = SDHCI_ADMA2_ALIGN -
645 (sg_dma_address(sg) & SDHCI_ADMA2_MASK);
646
647 buffer = sdhci_kmap_atomic(sg, &flags);
648 memcpy(buffer, align, size);
649 sdhci_kunmap_atomic(buffer, &flags);
2134a922 650
47fa9613
RK		 651 align += SDHCI_ADMA2_ALIGN;
652 }
2134a922
PO		 653 }
654 }
655 }
2134a922
PO		 656}
657
a3c7778f 658static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
d129bceb 659{
1c8cde92 660 u8 count;
a3c7778f 661 struct mmc_data *data = cmd->data;
1c8cde92 662 unsigned target_timeout, current_timeout;
d129bceb 663
ee53ab5d
PO		 664 /*
665 * If the host controller provides us with an incorrect timeout
666 * value, just skip the check and use 0xE. The hardware may take
667 * longer to time out, but that's much better than having a too-short
668 * timeout value.
669 */
11a2f1b7 670 if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)
ee53ab5d 671 return 0xE;
e538fbe8 672
a3c7778f 673 /* Unspecified timeout, assume max */
1d4d7744 674 if (!data && !cmd->busy_timeout)
a3c7778f 675 return 0xE;
d129bceb 676
a3c7778f
AW		 677 /* timeout in us */
678 if (!data)
1d4d7744 679 target_timeout = cmd->busy_timeout * 1000;
78a2ca27 680 else {
fafcfda9 681 target_timeout = DIV_ROUND_UP(data->timeout_ns, 1000);
7f05538a
RK		 682 if (host->clock && data->timeout_clks) {
683 unsigned long long val;
684
685 /*
686 * data->timeout_clks is in units of clock cycles.
687 * host->clock is in Hz. target_timeout is in us.
688 * Hence, us = 1000000 * cycles / Hz. Round up.
689 */
02265cd6 690 val = 1000000ULL * data->timeout_clks;
7f05538a
RK		 691 if (do_div(val, host->clock))
692 target_timeout++;
693 target_timeout += val;
694 }
78a2ca27 695 }
81b39802 696
1c8cde92
PO		 697 /*
698 * Figure out needed cycles.
699 * We do this in steps in order to fit inside a 32 bit int.
700 * The first step is the minimum timeout, which will have a
701 * minimum resolution of 6 bits:
702 * (1) 2^13*1000 > 2^22,
703 * (2) host->timeout_clk < 2^16
704 * =>
705 * (1) / (2) > 2^6
706 */
707 count = 0;
708 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
709 while (current_timeout < target_timeout) {
710 count++;
711 current_timeout <<= 1;
712 if (count >= 0xF)
713 break;
714 }
715
716 if (count >= 0xF) {
09eeff52
CB		 717 DBG("%s: Too large timeout 0x%x requested for CMD%d!\n",
718 mmc_hostname(host->mmc), count, cmd->opcode);
1c8cde92
PO		 719 count = 0xE;
720 }
721
ee53ab5d
PO		 722 return count;
723}
724
6aa943ab
AV		 725static void sdhci_set_transfer_irqs(struct sdhci_host *host)
726{
727 u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL;
728 u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR;
729
730 if (host->flags & SDHCI_REQ_USE_DMA)
b537f94c 731 host->ier = (host->ier & ~pio_irqs) | dma_irqs;
6aa943ab 732 else
b537f94c
RK		 733 host->ier = (host->ier & ~dma_irqs) | pio_irqs;
734
735 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
736 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
6aa943ab
AV		 737}
738
b45e668a 739static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
ee53ab5d
PO		 740{
741 u8 count;
b45e668a
AD		 742
743 if (host->ops->set_timeout) {
744 host->ops->set_timeout(host, cmd);
745 } else {
746 count = sdhci_calc_timeout(host, cmd);
747 sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
748 }
749}
750
751static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
752{
2134a922 753 u8 ctrl;
a3c7778f 754 struct mmc_data *data = cmd->data;
ee53ab5d 755
56a590dc 756 if (sdhci_data_line_cmd(cmd))
b45e668a 757 sdhci_set_timeout(host, cmd);
a3c7778f
AW		 758
759 if (!data)
ee53ab5d
PO		 760 return;
761
43dea098
AH		 762 WARN_ON(host->data);
763
ee53ab5d
PO		 764 /* Sanity checks */
765 BUG_ON(data->blksz * data->blocks > 524288);
766 BUG_ON(data->blksz > host->mmc->max_blk_size);
767 BUG_ON(data->blocks > 65535);
768
769 host->data = data;
770 host->data_early = 0;
f6a03cbf 771 host->data->bytes_xfered = 0;
ee53ab5d 772
fce14421 773 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
2134a922 774 struct scatterlist *sg;
df953925 775 unsigned int length_mask, offset_mask;
a0eaf0f9 776 int i;
2134a922 777
fce14421
RK		 778 host->flags |= SDHCI_REQ_USE_DMA;
779
780 /*
781 * FIXME: This doesn't account for merging when mapping the
782 * scatterlist.
783 *
784 * The assumption here being that alignment and lengths are
785 * the same after DMA mapping to device address space.
786 */
a0eaf0f9 787 length_mask = 0;
df953925 788 offset_mask = 0;
2134a922 789 if (host->flags & SDHCI_USE_ADMA) {
df953925 790 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) {
a0eaf0f9 791 length_mask = 3;
df953925
RK		 792 /*
793 * As we use up to 3 byte chunks to work
794 * around alignment problems, we need to
795 * check the offset as well.
796 */
797 offset_mask = 3;
798 }
2134a922
PO		 799 } else {
800 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
a0eaf0f9 801 length_mask = 3;
df953925
RK		 802 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
803 offset_mask = 3;
2134a922
PO		 804 }
805
df953925 806 if (unlikely(length_mask | offset_mask)) {
2134a922 807 for_each_sg(data->sg, sg, data->sg_len, i) {
a0eaf0f9 808 if (sg->length & length_mask) {
2e4456f0 809 DBG("Reverting to PIO because of transfer size (%d)\n",
a0eaf0f9 810 sg->length);
2134a922
PO		 811 host->flags &= ~SDHCI_REQ_USE_DMA;
812 break;
813 }
a0eaf0f9 814 if (sg->offset & offset_mask) {
2e4456f0 815 DBG("Reverting to PIO because of bad alignment\n");
2134a922
PO		 816 host->flags &= ~SDHCI_REQ_USE_DMA;
817 break;
818 }
819 }
820 }
821 }
822
8f1934ce 823 if (host->flags & SDHCI_REQ_USE_DMA) {
c0999b72 824 int sg_cnt = sdhci_pre_dma_transfer(host, data, COOKIE_MAPPED);
60c64762
RK		 825
826 if (sg_cnt <= 0) {
827 /*
828 * This only happens when someone fed
829 * us an invalid request.
830 */
831 WARN_ON(1);
832 host->flags &= ~SDHCI_REQ_USE_DMA;
833 } else if (host->flags & SDHCI_USE_ADMA) {
834 sdhci_adma_table_pre(host, data, sg_cnt);
835
836 sdhci_writel(host, host->adma_addr, SDHCI_ADMA_ADDRESS);
837 if (host->flags & SDHCI_USE_64_BIT_DMA)
838 sdhci_writel(host,
839 (u64)host->adma_addr >> 32,
840 SDHCI_ADMA_ADDRESS_HI);
8f1934ce 841 } else {
60c64762
RK		 842 WARN_ON(sg_cnt != 1);
843 sdhci_writel(host, sg_dma_address(data->sg),
844 SDHCI_DMA_ADDRESS);
8f1934ce
PO		 845 }
846 }
847
2134a922
PO		 848 /*
849 * Always adjust the DMA selection as some controllers
850 * (e.g. JMicron) can't do PIO properly when the selection
851 * is ADMA.
852 */
853 if (host->version >= SDHCI_SPEC_200) {
4e4141a5 854 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
2134a922
PO		 855 ctrl &= ~SDHCI_CTRL_DMA_MASK;
856 if ((host->flags & SDHCI_REQ_USE_DMA) &&
e57a5f61
AH		 857 (host->flags & SDHCI_USE_ADMA)) {
858 if (host->flags & SDHCI_USE_64_BIT_DMA)
859 ctrl |= SDHCI_CTRL_ADMA64;
860 else
861 ctrl |= SDHCI_CTRL_ADMA32;
862 } else {
2134a922 863 ctrl |= SDHCI_CTRL_SDMA;
e57a5f61 864 }
4e4141a5 865 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
c9fddbc4
PO		 866 }
867
8f1934ce 868 if (!(host->flags & SDHCI_REQ_USE_DMA)) {
da60a91d
SAS		 869 int flags;
870
871 flags = SG_MITER_ATOMIC;
872 if (host->data->flags & MMC_DATA_READ)
873 flags |= SG_MITER_TO_SG;
874 else
875 flags |= SG_MITER_FROM_SG;
876 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
7659150c 877 host->blocks = data->blocks;
d129bceb 878 }
c7fa9963 879
6aa943ab
AV		 880 sdhci_set_transfer_irqs(host);
881
f6a03cbf
MV		 882 /* Set the DMA boundary value and block size */
883 sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
884 data->blksz), SDHCI_BLOCK_SIZE);
4e4141a5 885 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
c7fa9963
PO		 886}
887
0293d501
AH		 888static inline bool sdhci_auto_cmd12(struct sdhci_host *host,
889 struct mmc_request *mrq)
890{
20845bef
AH		 891 return !mrq->sbc && (host->flags & SDHCI_AUTO_CMD12) &&
892 !mrq->cap_cmd_during_tfr;
0293d501
AH		 893}
894
c7fa9963 895static void sdhci_set_transfer_mode(struct sdhci_host *host,
e89d456f 896 struct mmc_command *cmd)
c7fa9963 897{
d3fc5d71 898 u16 mode = 0;
e89d456f 899 struct mmc_data *data = cmd->data;
c7fa9963 900
2b558c13 901 if (data == NULL) {
9b8ffea6
VW		 902 if (host->quirks2 &
903 SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD) {
904 sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
905 } else {
2b558c13 906 /* clear Auto CMD settings for no data CMDs */
9b8ffea6
VW		 907 mode = sdhci_readw(host, SDHCI_TRANSFER_MODE);
908 sdhci_writew(host, mode & ~(SDHCI_TRNS_AUTO_CMD12 |
2b558c13 909 SDHCI_TRNS_AUTO_CMD23), SDHCI_TRANSFER_MODE);
9b8ffea6 910 }
c7fa9963 911 return;
2b558c13 912 }
c7fa9963 913
e538fbe8
PO		 914 WARN_ON(!host->data);
915
d3fc5d71
VY		 916 if (!(host->quirks2 & SDHCI_QUIRK2_SUPPORT_SINGLE))
917 mode = SDHCI_TRNS_BLK_CNT_EN;
918
e89d456f 919 if (mmc_op_multi(cmd->opcode) || data->blocks > 1) {
d3fc5d71 920 mode = SDHCI_TRNS_BLK_CNT_EN | SDHCI_TRNS_MULTI;
e89d456f
AW		 921 /*
922 * If we are sending CMD23, CMD12 never gets sent
923 * on successful completion (so no Auto-CMD12).
924 */
0293d501 925 if (sdhci_auto_cmd12(host, cmd->mrq) &&
85cc1c33 926 (cmd->opcode != SD_IO_RW_EXTENDED))
e89d456f 927 mode |= SDHCI_TRNS_AUTO_CMD12;
a4c73aba 928 else if (cmd->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
8edf6371 929 mode |= SDHCI_TRNS_AUTO_CMD23;
a4c73aba 930 sdhci_writel(host, cmd->mrq->sbc->arg, SDHCI_ARGUMENT2);
8edf6371 931 }
c4512f79 932 }
8edf6371 933
c7fa9963
PO		 934 if (data->flags & MMC_DATA_READ)
935 mode |= SDHCI_TRNS_READ;
c9fddbc4 936 if (host->flags & SDHCI_REQ_USE_DMA)
c7fa9963
PO		 937 mode |= SDHCI_TRNS_DMA;
938
4e4141a5 939 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
d129bceb
PO		 940}
941
0cc563ce
AH		 942static bool sdhci_needs_reset(struct sdhci_host *host, struct mmc_request *mrq)
943{
944 return (!(host->flags & SDHCI_DEVICE_DEAD) &&
945 ((mrq->cmd && mrq->cmd->error) ||
946 (mrq->sbc && mrq->sbc->error) ||
947 (mrq->data && ((mrq->data->error && !mrq->data->stop) ||
948 (mrq->data->stop && mrq->data->stop->error))) ||
949 (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)));
950}
951
4e9f8fe5
AH		 952static void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
953{
954 int i;
955
956 for (i = 0; i < SDHCI_MAX_MRQS; i++) {
957 if (host->mrqs_done[i] == mrq) {
958 WARN_ON(1);
959 return;
960 }
961 }
962
963 for (i = 0; i < SDHCI_MAX_MRQS; i++) {
964 if (!host->mrqs_done[i]) {
965 host->mrqs_done[i] = mrq;
966 break;
967 }
968 }
969
970 WARN_ON(i >= SDHCI_MAX_MRQS);
971
972 tasklet_schedule(&host->finish_tasklet);
973}
974
a6d3bdd5
AH		 975static void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
976{
5a8a3fef
AH		 977 if (host->cmd && host->cmd->mrq == mrq)
978 host->cmd = NULL;
979
980 if (host->data_cmd && host->data_cmd->mrq == mrq)
981 host->data_cmd = NULL;
982
983 if (host->data && host->data->mrq == mrq)
984 host->data = NULL;
985
ed1563de
AH		 986 if (sdhci_needs_reset(host, mrq))
987 host->pending_reset = true;
988
4e9f8fe5 989 __sdhci_finish_mrq(host, mrq);
a6d3bdd5
AH		 990}
991
d129bceb
PO		 992static void sdhci_finish_data(struct sdhci_host *host)
993{
33a57adb
AH		 994 struct mmc_command *data_cmd = host->data_cmd;
995 struct mmc_data *data = host->data;
d129bceb 996
d129bceb 997 host->data = NULL;
7c89a3d9 998 host->data_cmd = NULL;
d129bceb 999
add8913d
RK		 1000 if ((host->flags & (SDHCI_REQ_USE_DMA | SDHCI_USE_ADMA)) ==
1001 (SDHCI_REQ_USE_DMA | SDHCI_USE_ADMA))
1002 sdhci_adma_table_post(host, data);
d129bceb
PO		 1003
1004 /*
c9b74c5b
PO		 1005 * The specification states that the block count register must
1006 * be updated, but it does not specify at what point in the
1007 * data flow. That makes the register entirely useless to read
1008 * back so we have to assume that nothing made it to the card
1009 * in the event of an error.
d129bceb 1010 */
c9b74c5b
PO		 1011 if (data->error)
1012 data->bytes_xfered = 0;
d129bceb 1013 else
c9b74c5b 1014 data->bytes_xfered = data->blksz * data->blocks;
d129bceb 1015
e89d456f
AW		 1016 /*
1017 * Need to send CMD12 if -
1018 * a) open-ended multiblock transfer (no CMD23)
1019 * b) error in multiblock transfer
1020 */
1021 if (data->stop &&
1022 (data->error ||
a4c73aba 1023 !data->mrq->sbc)) {
e89d456f 1024
d129bceb
PO		 1025 /*
1026 * The controller needs a reset of internal state machines
1027 * upon error conditions.
1028 */
17b0429d 1029 if (data->error) {
33a57adb
AH		 1030 if (!host->cmd || host->cmd == data_cmd)
1031 sdhci_do_reset(host, SDHCI_RESET_CMD);
03231f9b 1032 sdhci_do_reset(host, SDHCI_RESET_DATA);
d129bceb
PO		 1033 }
1034
20845bef
AH		 1035 /*
1036 * 'cap_cmd_during_tfr' request must not use the command line
1037 * after mmc_command_done() has been called. It is upper layer's
1038 * responsibility to send the stop command if required.
1039 */
1040 if (data->mrq->cap_cmd_during_tfr) {
1041 sdhci_finish_mrq(host, data->mrq);
1042 } else {
1043 /* Avoid triggering warning in sdhci_send_command() */
1044 host->cmd = NULL;
1045 sdhci_send_command(host, data->stop);
1046 }
a6d3bdd5
AH		 1047 } else {
1048 sdhci_finish_mrq(host, data->mrq);
1049 }
d129bceb
PO		 1050}
1051
d7422fb4
AH		 1052static void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq,
1053 unsigned long timeout)
1054{
1055 if (sdhci_data_line_cmd(mrq->cmd))
1056 mod_timer(&host->data_timer, timeout);
1057 else
1058 mod_timer(&host->timer, timeout);
1059}
1060
1061static void sdhci_del_timer(struct sdhci_host *host, struct mmc_request *mrq)
1062{
1063 if (sdhci_data_line_cmd(mrq->cmd))
1064 del_timer(&host->data_timer);
1065 else
1066 del_timer(&host->timer);
1067}
1068
c0e55129 1069void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
d129bceb
PO		 1070{
1071 int flags;
fd2208d7 1072 u32 mask;
7cb2c76f 1073 unsigned long timeout;
d129bceb
PO		 1074
1075 WARN_ON(host->cmd);
1076
96776200
RK		 1077 /* Initially, a command has no error */
1078 cmd->error = 0;
1079
fc605f1d
AH		 1080 if ((host->quirks2 & SDHCI_QUIRK2_STOP_WITH_TC) &&
1081 cmd->opcode == MMC_STOP_TRANSMISSION)
1082 cmd->flags |= MMC_RSP_BUSY;
1083
d129bceb 1084 /* Wait max 10 ms */
7cb2c76f 1085 timeout = 10;
fd2208d7
PO		 1086
1087 mask = SDHCI_CMD_INHIBIT;
56a590dc 1088 if (sdhci_data_line_cmd(cmd))
fd2208d7
PO		 1089 mask |= SDHCI_DATA_INHIBIT;
1090
1091 /* We shouldn't wait for data inihibit for stop commands, even
1092 though they might use busy signaling */
a4c73aba 1093 if (cmd->mrq->data && (cmd == cmd->mrq->data->stop))
fd2208d7
PO		 1094 mask &= ~SDHCI_DATA_INHIBIT;
1095
4e4141a5 1096 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
7cb2c76f 1097 if (timeout == 0) {
2e4456f0
MV		 1098 pr_err("%s: Controller never released inhibit bit(s).\n",
1099 mmc_hostname(host->mmc));
d129bceb 1100 sdhci_dumpregs(host);
17b0429d 1101 cmd->error = -EIO;
a6d3bdd5 1102 sdhci_finish_mrq(host, cmd->mrq);
d129bceb
PO		 1103 return;
1104 }
7cb2c76f
PO		 1105 timeout--;
1106 mdelay(1);
1107 }
d129bceb 1108
3e1a6892 1109 timeout = jiffies;
1d4d7744
UH		 1110 if (!cmd->data && cmd->busy_timeout > 9000)
1111 timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ;
3e1a6892
AH		 1112 else
1113 timeout += 10 * HZ;
d7422fb4 1114 sdhci_mod_timer(host, cmd->mrq, timeout);
d129bceb
PO		 1115
1116 host->cmd = cmd;
56a590dc 1117 if (sdhci_data_line_cmd(cmd)) {
7c89a3d9
AH		 1118 WARN_ON(host->data_cmd);
1119 host->data_cmd = cmd;
1120 }
d129bceb 1121
a3c7778f 1122 sdhci_prepare_data(host, cmd);
d129bceb 1123
4e4141a5 1124 sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT);
d129bceb 1125
e89d456f 1126 sdhci_set_transfer_mode(host, cmd);
c7fa9963 1127
d129bceb 1128 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
a3c76eb9 1129 pr_err("%s: Unsupported response type!\n",
d129bceb 1130 mmc_hostname(host->mmc));
17b0429d 1131 cmd->error = -EINVAL;
a6d3bdd5 1132 sdhci_finish_mrq(host, cmd->mrq);
d129bceb
PO		 1133 return;
1134 }
1135
1136 if (!(cmd->flags & MMC_RSP_PRESENT))
1137 flags = SDHCI_CMD_RESP_NONE;
1138 else if (cmd->flags & MMC_RSP_136)
1139 flags = SDHCI_CMD_RESP_LONG;
1140 else if (cmd->flags & MMC_RSP_BUSY)
1141 flags = SDHCI_CMD_RESP_SHORT_BUSY;
1142 else
1143 flags = SDHCI_CMD_RESP_SHORT;
1144
1145 if (cmd->flags & MMC_RSP_CRC)
1146 flags |= SDHCI_CMD_CRC;
1147 if (cmd->flags & MMC_RSP_OPCODE)
1148 flags |= SDHCI_CMD_INDEX;
b513ea25
AN		 1149
1150 /* CMD19 is special in that the Data Present Select should be set */
069c9f14
G		 1151 if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1152 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200)
d129bceb
PO		 1153 flags |= SDHCI_CMD_DATA;
1154
4e4141a5 1155 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
d129bceb 1156}
c0e55129 1157EXPORT_SYMBOL_GPL(sdhci_send_command);
d129bceb
PO		 1158
1159static void sdhci_finish_command(struct sdhci_host *host)
1160{
e0a5640a 1161 struct mmc_command *cmd = host->cmd;
d129bceb
PO		 1162 int i;
1163
e0a5640a
AH		 1164 host->cmd = NULL;
1165
1166 if (cmd->flags & MMC_RSP_PRESENT) {
1167 if (cmd->flags & MMC_RSP_136) {
d129bceb
PO		 1168 /* CRC is stripped so we need to do some shifting. */
1169 for (i = 0;i < 4;i++) {
e0a5640a 1170 cmd->resp[i] = sdhci_readl(host,
d129bceb
PO		 1171 SDHCI_RESPONSE + (3-i)*4) << 8;
1172 if (i != 3)
e0a5640a 1173 cmd->resp[i] |=
4e4141a5 1174 sdhci_readb(host,
d129bceb
PO		 1175 SDHCI_RESPONSE + (3-i)*4-1);
1176 }
1177 } else {
e0a5640a 1178 cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE);
d129bceb
PO		 1179 }
1180 }
1181
20845bef
AH		 1182 if (cmd->mrq->cap_cmd_during_tfr && cmd == cmd->mrq->cmd)
1183 mmc_command_done(host->mmc, cmd->mrq);
1184
6bde8681
AH		 1185 /*
1186 * The host can send and interrupt when the busy state has
1187 * ended, allowing us to wait without wasting CPU cycles.
1188 * The busy signal uses DAT0 so this is similar to waiting
1189 * for data to complete.
1190 *
1191 * Note: The 1.0 specification is a bit ambiguous about this
1192 * feature so there might be some problems with older
1193 * controllers.
1194 */
e0a5640a
AH		 1195 if (cmd->flags & MMC_RSP_BUSY) {
1196 if (cmd->data) {
6bde8681
AH		 1197 DBG("Cannot wait for busy signal when also doing a data transfer");
1198 } else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ) &&
ea968023
AH		 1199 cmd == host->data_cmd) {
1200 /* Command complete before busy is ended */
6bde8681
AH		 1201 return;
1202 }
1203 }
1204
e89d456f 1205 /* Finished CMD23, now send actual command. */
a4c73aba
AH		 1206 if (cmd == cmd->mrq->sbc) {
1207 sdhci_send_command(host, cmd->mrq->cmd);
e89d456f 1208 } else {
e538fbe8 1209
e89d456f
AW		 1210 /* Processed actual command. */
1211 if (host->data && host->data_early)
1212 sdhci_finish_data(host);
d129bceb 1213
e0a5640a 1214 if (!cmd->data)
a6d3bdd5 1215 sdhci_finish_mrq(host, cmd->mrq);
e89d456f 1216 }
d129bceb
PO		 1217}
1218
52983382
KL		 1219static u16 sdhci_get_preset_value(struct sdhci_host *host)
1220{
d975f121 1221 u16 preset = 0;
52983382 1222
d975f121
RK		 1223 switch (host->timing) {
1224 case MMC_TIMING_UHS_SDR12:
52983382
KL		 1225 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
1226 break;
d975f121 1227 case MMC_TIMING_UHS_SDR25:
52983382
KL		 1228 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR25);
1229 break;
d975f121 1230 case MMC_TIMING_UHS_SDR50:
52983382
KL		 1231 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR50);
1232 break;
d975f121
RK		 1233 case MMC_TIMING_UHS_SDR104:
1234 case MMC_TIMING_MMC_HS200:
52983382
KL		 1235 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104);
1236 break;
d975f121 1237 case MMC_TIMING_UHS_DDR50:
0dafa60e 1238 case MMC_TIMING_MMC_DDR52:
52983382
KL		 1239 preset = sdhci_readw(host, SDHCI_PRESET_FOR_DDR50);
1240 break;
e9fb05d5
AH		 1241 case MMC_TIMING_MMC_HS400:
1242 preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400);
1243 break;
52983382
KL		 1244 default:
1245 pr_warn("%s: Invalid UHS-I mode selected\n",
1246 mmc_hostname(host->mmc));
1247 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
1248 break;
1249 }
1250 return preset;
1251}
1252
fb9ee047
LD		 1253u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
1254 unsigned int *actual_clock)
d129bceb 1255{
c3ed3877 1256 int div = 0; /* Initialized for compiler warning */
df16219f 1257 int real_div = div, clk_mul = 1;
c3ed3877 1258 u16 clk = 0;
5497159c 1259 bool switch_base_clk = false;
d129bceb 1260
85105c53 1261 if (host->version >= SDHCI_SPEC_300) {
da91a8f9 1262 if (host->preset_enabled) {
52983382
KL		 1263 u16 pre_val;
1264
1265 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1266 pre_val = sdhci_get_preset_value(host);
1267 div = (pre_val & SDHCI_PRESET_SDCLK_FREQ_MASK)
1268 >> SDHCI_PRESET_SDCLK_FREQ_SHIFT;
1269 if (host->clk_mul &&
1270 (pre_val & SDHCI_PRESET_CLKGEN_SEL_MASK)) {
1271 clk = SDHCI_PROG_CLOCK_MODE;
1272 real_div = div + 1;
1273 clk_mul = host->clk_mul;
1274 } else {
1275 real_div = max_t(int, 1, div << 1);
1276 }
1277 goto clock_set;
1278 }
1279
c3ed3877
AN		 1280 /*
1281 * Check if the Host Controller supports Programmable Clock
1282 * Mode.
1283 */
1284 if (host->clk_mul) {
52983382
KL		 1285 for (div = 1; div <= 1024; div++) {
1286 if ((host->max_clk * host->clk_mul / div)
1287 <= clock)
1288 break;
1289 }
5497159c 1290 if ((host->max_clk * host->clk_mul / div) <= clock) {
1291 /*
1292 * Set Programmable Clock Mode in the Clock
1293 * Control register.
1294 */
1295 clk = SDHCI_PROG_CLOCK_MODE;
1296 real_div = div;
1297 clk_mul = host->clk_mul;
1298 div--;
1299 } else {
1300 /*
1301 * Divisor can be too small to reach clock
1302 * speed requirement. Then use the base clock.
1303 */
1304 switch_base_clk = true;
1305 }
1306 }
1307
1308 if (!host->clk_mul || switch_base_clk) {
c3ed3877
AN		 1309 /* Version 3.00 divisors must be a multiple of 2. */
1310 if (host->max_clk <= clock)
1311 div = 1;
1312 else {
1313 for (div = 2; div < SDHCI_MAX_DIV_SPEC_300;
1314 div += 2) {
1315 if ((host->max_clk / div) <= clock)
1316 break;
1317 }
85105c53 1318 }
df16219f 1319 real_div = div;
c3ed3877 1320 div >>= 1;
d1955c3a
SG		 1321 if ((host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN)
1322 && !div && host->max_clk <= 25000000)
1323 div = 1;
85105c53
ZG		 1324 }
1325 } else {
1326 /* Version 2.00 divisors must be a power of 2. */
0397526d 1327 for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
85105c53
ZG		 1328 if ((host->max_clk / div) <= clock)
1329 break;
1330 }
df16219f 1331 real_div = div;
c3ed3877 1332 div >>= 1;
d129bceb 1333 }
d129bceb 1334
52983382 1335clock_set:
03d6f5ff 1336 if (real_div)
fb9ee047 1337 *actual_clock = (host->max_clk * clk_mul) / real_div;
c3ed3877 1338 clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
85105c53
ZG		 1339 clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
1340 << SDHCI_DIVIDER_HI_SHIFT;
fb9ee047
LD		 1341
1342 return clk;
1343}
1344EXPORT_SYMBOL_GPL(sdhci_calc_clk);
1345
1346void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
1347{
1348 u16 clk;
1349 unsigned long timeout;
1350
1351 host->mmc->actual_clock = 0;
1352
1353 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
fb9ee047
LD		 1354
1355 if (clock == 0)
1356 return;
1357
1358 clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
1359
d129bceb 1360 clk |= SDHCI_CLOCK_INT_EN;
4e4141a5 1361 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb 1362
27f6cb16
CB		 1363 /* Wait max 20 ms */
1364 timeout = 20;
4e4141a5 1365 while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
7cb2c76f
PO		 1366 & SDHCI_CLOCK_INT_STABLE)) {
1367 if (timeout == 0) {
2e4456f0
MV		 1368 pr_err("%s: Internal clock never stabilised.\n",
1369 mmc_hostname(host->mmc));
d129bceb
PO		 1370 sdhci_dumpregs(host);
1371 return;
1372 }
7cb2c76f
PO		 1373 timeout--;
1374 mdelay(1);
1375 }
d129bceb
PO		 1376
1377 clk |= SDHCI_CLOCK_CARD_EN;
4e4141a5 1378 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
d129bceb 1379}
1771059c 1380EXPORT_SYMBOL_GPL(sdhci_set_clock);
d129bceb 1381
1dceb041
AH		 1382static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode,
1383 unsigned short vdd)
146ad66e 1384{
3a48edc4 1385 struct mmc_host *mmc = host->mmc;
1dceb041
AH		 1386
1387 spin_unlock_irq(&host->lock);
1388 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
1389 spin_lock_irq(&host->lock);
1390
1391 if (mode != MMC_POWER_OFF)
1392 sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL);
1393 else
1394 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1395}
1396
606d3131
AH		 1397void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
1398 unsigned short vdd)
1dceb041 1399{
8364248a 1400 u8 pwr = 0;
146ad66e 1401
24fbb3ca
RK		 1402 if (mode != MMC_POWER_OFF) {
1403 switch (1 << vdd) {
ae628903
PO		 1404 case MMC_VDD_165_195:
1405 pwr = SDHCI_POWER_180;
1406 break;
1407 case MMC_VDD_29_30:
1408 case MMC_VDD_30_31:
1409 pwr = SDHCI_POWER_300;
1410 break;
1411 case MMC_VDD_32_33:
1412 case MMC_VDD_33_34:
1413 pwr = SDHCI_POWER_330;
1414 break;
1415 default:
9d5de93f
AH		 1416 WARN(1, "%s: Invalid vdd %#x\n",
1417 mmc_hostname(host->mmc), vdd);
1418 break;
ae628903
PO		 1419 }
1420 }
1421
1422 if (host->pwr == pwr)
e921a8b6 1423 return;
146ad66e 1424
ae628903
PO		 1425 host->pwr = pwr;
1426
1427 if (pwr == 0) {
4e4141a5 1428 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
f0710a55
AH		 1429 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1430 sdhci_runtime_pm_bus_off(host);
e921a8b6
RK		 1431 } else {
1432 /*
1433 * Spec says that we should clear the power reg before setting
1434 * a new value. Some controllers don't seem to like this though.
1435 */
1436 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
1437 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
146ad66e 1438
e921a8b6
RK		 1439 /*
1440 * At least the Marvell CaFe chip gets confused if we set the
1441 * voltage and set turn on power at the same time, so set the
1442 * voltage first.
1443 */
1444 if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
1445 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
e08c1694 1446
e921a8b6 1447 pwr |= SDHCI_POWER_ON;
146ad66e 1448
e921a8b6 1449 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
557b0697 1450
e921a8b6
RK		 1451 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1452 sdhci_runtime_pm_bus_on(host);
f0710a55 1453
e921a8b6
RK		 1454 /*
1455 * Some controllers need an extra 10ms delay of 10ms before
1456 * they can apply clock after applying power
1457 */
1458 if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
1459 mdelay(10);
1460 }
1dceb041 1461}
606d3131 1462EXPORT_SYMBOL_GPL(sdhci_set_power_noreg);
918f4cbd 1463
606d3131
AH		 1464void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
1465 unsigned short vdd)
1dceb041 1466{
606d3131
AH		 1467 if (IS_ERR(host->mmc->supply.vmmc))
1468 sdhci_set_power_noreg(host, mode, vdd);
1dceb041 1469 else
606d3131 1470 sdhci_set_power_reg(host, mode, vdd);
146ad66e 1471}
606d3131 1472EXPORT_SYMBOL_GPL(sdhci_set_power);
146ad66e 1473
d129bceb
PO		 1474/*****************************************************************************\
1475 * *
1476 * MMC callbacks *
1477 * *
1478\*****************************************************************************/
1479
1480static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
1481{
1482 struct sdhci_host *host;
505a8680 1483 int present;
d129bceb
PO		 1484 unsigned long flags;
1485
1486 host = mmc_priv(mmc);
1487
04e079cf 1488 /* Firstly check card presence */
8d28b7a7 1489 present = mmc->ops->get_cd(mmc);
2836766a 1490
d129bceb
PO		 1491 spin_lock_irqsave(&host->lock, flags);
1492
061d17a6 1493 sdhci_led_activate(host);
e89d456f
AW		 1494
1495 /*
1496 * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED
1497 * requests if Auto-CMD12 is enabled.
1498 */
0293d501 1499 if (sdhci_auto_cmd12(host, mrq)) {
c4512f79
JH		 1500 if (mrq->stop) {
1501 mrq->data->stop = NULL;
1502 mrq->stop = NULL;
1503 }
1504 }
d129bceb 1505
68d1fb7e 1506 if (!present || host->flags & SDHCI_DEVICE_DEAD) {
a4c73aba 1507 mrq->cmd->error = -ENOMEDIUM;
a6d3bdd5 1508 sdhci_finish_mrq(host, mrq);
cf2b5eea 1509 } else {
8edf6371 1510 if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23))
e89d456f
AW		 1511 sdhci_send_command(host, mrq->sbc);
1512 else
1513 sdhci_send_command(host, mrq->cmd);
cf2b5eea 1514 }
d129bceb 1515
5f25a66f 1516 mmiowb();
d129bceb
PO		 1517 spin_unlock_irqrestore(&host->lock, flags);
1518}
1519
2317f56c
RK		 1520void sdhci_set_bus_width(struct sdhci_host *host, int width)
1521{
1522 u8 ctrl;
1523
1524 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
1525 if (width == MMC_BUS_WIDTH_8) {
1526 ctrl &= ~SDHCI_CTRL_4BITBUS;
1527 if (host->version >= SDHCI_SPEC_300)
1528 ctrl |= SDHCI_CTRL_8BITBUS;
1529 } else {
1530 if (host->version >= SDHCI_SPEC_300)
1531 ctrl &= ~SDHCI_CTRL_8BITBUS;
1532 if (width == MMC_BUS_WIDTH_4)
1533 ctrl |= SDHCI_CTRL_4BITBUS;
1534 else
1535 ctrl &= ~SDHCI_CTRL_4BITBUS;
1536 }
1537 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1538}
1539EXPORT_SYMBOL_GPL(sdhci_set_bus_width);
1540
96d7b78c
RK		 1541void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
1542{
1543 u16 ctrl_2;
1544
1545 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1546 /* Select Bus Speed Mode for host */
1547 ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
1548 if ((timing == MMC_TIMING_MMC_HS200) ||
1549 (timing == MMC_TIMING_UHS_SDR104))
1550 ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
1551 else if (timing == MMC_TIMING_UHS_SDR12)
1552 ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
1553 else if (timing == MMC_TIMING_UHS_SDR25)
1554 ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
1555 else if (timing == MMC_TIMING_UHS_SDR50)
1556 ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
1557 else if ((timing == MMC_TIMING_UHS_DDR50) ||
1558 (timing == MMC_TIMING_MMC_DDR52))
1559 ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
e9fb05d5
AH		 1560 else if (timing == MMC_TIMING_MMC_HS400)
1561 ctrl_2 |= SDHCI_CTRL_HS400; /* Non-standard */
96d7b78c
RK		 1562 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
1563}
1564EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling);
1565
ded97e0b 1566static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
d129bceb 1567{
ded97e0b 1568 struct sdhci_host *host = mmc_priv(mmc);
d129bceb
PO		 1569 unsigned long flags;
1570 u8 ctrl;
1571
d129bceb
PO		 1572 spin_lock_irqsave(&host->lock, flags);
1573
ceb6143b
AH		 1574 if (host->flags & SDHCI_DEVICE_DEAD) {
1575 spin_unlock_irqrestore(&host->lock, flags);
3a48edc4
TK		 1576 if (!IS_ERR(mmc->supply.vmmc) &&
1577 ios->power_mode == MMC_POWER_OFF)
4e743f1f 1578 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
ceb6143b
AH		 1579 return;
1580 }
1e72859e 1581
d129bceb
PO		 1582 /*
1583 * Reset the chip on each power off.
1584 * Should clear out any weird states.
1585 */
1586 if (ios->power_mode == MMC_POWER_OFF) {
4e4141a5 1587 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
7260cf5e 1588 sdhci_reinit(host);
d129bceb
PO		 1589 }
1590
52983382 1591 if (host->version >= SDHCI_SPEC_300 &&
372c4634
DA		 1592 (ios->power_mode == MMC_POWER_UP) &&
1593 !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN))
52983382
KL		 1594 sdhci_enable_preset_value(host, false);
1595
373073ef 1596 if (!ios->clock || ios->clock != host->clock) {
1771059c 1597 host->ops->set_clock(host, ios->clock);
373073ef 1598 host->clock = ios->clock;
03d6f5ff
AD		 1599
1600 if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK &&
1601 host->clock) {
1602 host->timeout_clk = host->mmc->actual_clock ?
1603 host->mmc->actual_clock / 1000 :
1604 host->clock / 1000;
1605 host->mmc->max_busy_timeout =
1606 host->ops->get_max_timeout_count ?
1607 host->ops->get_max_timeout_count(host) :
1608 1 << 27;
1609 host->mmc->max_busy_timeout /= host->timeout_clk;
1610 }
373073ef 1611 }
d129bceb 1612
606d3131
AH		 1613 if (host->ops->set_power)
1614 host->ops->set_power(host, ios->power_mode, ios->vdd);
1615 else
1616 sdhci_set_power(host, ios->power_mode, ios->vdd);
d129bceb 1617
643a81ff
PR		 1618 if (host->ops->platform_send_init_74_clocks)
1619 host->ops->platform_send_init_74_clocks(host, ios->power_mode);
1620
2317f56c 1621 host->ops->set_bus_width(host, ios->bus_width);
ae6d6c92 1622
15ec4461 1623 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
cd9277c0 1624
3ab9c8da
PR		 1625 if ((ios->timing == MMC_TIMING_SD_HS ||
1626 ios->timing == MMC_TIMING_MMC_HS)
1627 && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT))
cd9277c0
PO		 1628 ctrl |= SDHCI_CTRL_HISPD;
1629 else
1630 ctrl &= ~SDHCI_CTRL_HISPD;
1631
d6d50a15 1632 if (host->version >= SDHCI_SPEC_300) {
49c468fc 1633 u16 clk, ctrl_2;
49c468fc
AN		 1634
1635 /* In case of UHS-I modes, set High Speed Enable */
e9fb05d5
AH		 1636 if ((ios->timing == MMC_TIMING_MMC_HS400) ||
1637 (ios->timing == MMC_TIMING_MMC_HS200) ||
bb8175a8 1638 (ios->timing == MMC_TIMING_MMC_DDR52) ||
069c9f14 1639 (ios->timing == MMC_TIMING_UHS_SDR50) ||
49c468fc
AN		 1640 (ios->timing == MMC_TIMING_UHS_SDR104) ||
1641 (ios->timing == MMC_TIMING_UHS_DDR50) ||
dd8df17f 1642 (ios->timing == MMC_TIMING_UHS_SDR25))
49c468fc 1643 ctrl |= SDHCI_CTRL_HISPD;
d6d50a15 1644
da91a8f9 1645 if (!host->preset_enabled) {
758535c4 1646 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d6d50a15
AN		 1647 /*
1648 * We only need to set Driver Strength if the
1649 * preset value enable is not set.
1650 */
da91a8f9 1651 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
d6d50a15
AN		 1652 ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK;
1653 if (ios->drv_type == MMC_SET_DRIVER_TYPE_A)
1654 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A;
43e943a0
PG		 1655 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_B)
1656 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_B;
d6d50a15
AN		 1657 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C)
1658 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C;
43e943a0
PG		 1659 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_D)
1660 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_D;
1661 else {
2e4456f0
MV		 1662 pr_warn("%s: invalid driver type, default to driver type B\n",
1663 mmc_hostname(mmc));
43e943a0
PG		 1664 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_B;
1665 }
d6d50a15
AN		 1666
1667 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
758535c4
AN		 1668 } else {
1669 /*
1670 * According to SDHC Spec v3.00, if the Preset Value
1671 * Enable in the Host Control 2 register is set, we
1672 * need to reset SD Clock Enable before changing High
1673 * Speed Enable to avoid generating clock gliches.
1674 */
758535c4
AN		 1675
1676 /* Reset SD Clock Enable */
1677 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1678 clk &= ~SDHCI_CLOCK_CARD_EN;
1679 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1680
1681 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1682
1683 /* Re-enable SD Clock */
1771059c 1684 host->ops->set_clock(host, host->clock);
d6d50a15 1685 }
49c468fc 1686
49c468fc
AN		 1687 /* Reset SD Clock Enable */
1688 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1689 clk &= ~SDHCI_CLOCK_CARD_EN;
1690 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1691
96d7b78c 1692 host->ops->set_uhs_signaling(host, ios->timing);
d975f121 1693 host->timing = ios->timing;
49c468fc 1694
52983382
KL		 1695 if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN) &&
1696 ((ios->timing == MMC_TIMING_UHS_SDR12) ||
1697 (ios->timing == MMC_TIMING_UHS_SDR25) ||
1698 (ios->timing == MMC_TIMING_UHS_SDR50) ||
1699 (ios->timing == MMC_TIMING_UHS_SDR104) ||
0dafa60e
JZ		 1700 (ios->timing == MMC_TIMING_UHS_DDR50) ||
1701 (ios->timing == MMC_TIMING_MMC_DDR52))) {
52983382
KL		 1702 u16 preset;
1703
1704 sdhci_enable_preset_value(host, true);
1705 preset = sdhci_get_preset_value(host);
1706 ios->drv_type = (preset & SDHCI_PRESET_DRV_MASK)
1707 >> SDHCI_PRESET_DRV_SHIFT;
1708 }
1709
49c468fc 1710 /* Re-enable SD Clock */
1771059c 1711 host->ops->set_clock(host, host->clock);
758535c4
AN		 1712 } else
1713 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
d6d50a15 1714
b8352260
LD		 1715 /*
1716 * Some (ENE) controllers go apeshit on some ios operation,
1717 * signalling timeout and CRC errors even on CMD0. Resetting
1718 * it on each ios seems to solve the problem.
1719 */
c63705e1 1720 if (host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
03231f9b 1721 sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
b8352260 1722
5f25a66f 1723 mmiowb();
d129bceb
PO		 1724 spin_unlock_irqrestore(&host->lock, flags);
1725}
1726
ded97e0b 1727static int sdhci_get_cd(struct mmc_host *mmc)
66fd8ad5
AH		 1728{
1729 struct sdhci_host *host = mmc_priv(mmc);
ded97e0b 1730 int gpio_cd = mmc_gpio_get_cd(mmc);
94144a46
KL		 1731
1732 if (host->flags & SDHCI_DEVICE_DEAD)
1733 return 0;
1734
88af5655 1735 /* If nonremovable, assume that the card is always present. */
860951c5 1736 if (!mmc_card_is_removable(host->mmc))
94144a46
KL		 1737 return 1;
1738
88af5655
II		 1739 /*
1740 * Try slot gpio detect, if defined it take precedence
1741 * over build in controller functionality
1742 */
287980e4 1743 if (gpio_cd >= 0)
94144a46
KL		 1744 return !!gpio_cd;
1745
88af5655
II		 1746 /* If polling, assume that the card is always present. */
1747 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
1748 return 1;
1749
94144a46
KL		 1750 /* Host native card detect */
1751 return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
1752}
1753
66fd8ad5 1754static int sdhci_check_ro(struct sdhci_host *host)
d129bceb 1755{
d129bceb 1756 unsigned long flags;
2dfb579c 1757 int is_readonly;
d129bceb 1758
d129bceb
PO		 1759 spin_lock_irqsave(&host->lock, flags);
1760
1e72859e 1761 if (host->flags & SDHCI_DEVICE_DEAD)
2dfb579c
WS		 1762 is_readonly = 0;
1763 else if (host->ops->get_ro)
1764 is_readonly = host->ops->get_ro(host);
1e72859e 1765 else
2dfb579c
WS		 1766 is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE)
1767 & SDHCI_WRITE_PROTECT);
d129bceb
PO		 1768
1769 spin_unlock_irqrestore(&host->lock, flags);
1770
2dfb579c
WS		 1771 /* This quirk needs to be replaced by a callback-function later */
1772 return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ?
1773 !is_readonly : is_readonly;
d129bceb
PO		 1774}
1775
82b0e23a
TI		 1776#define SAMPLE_COUNT 5
1777
ded97e0b 1778static int sdhci_get_ro(struct mmc_host *mmc)
82b0e23a 1779{
ded97e0b 1780 struct sdhci_host *host = mmc_priv(mmc);
82b0e23a
TI		 1781 int i, ro_count;
1782
82b0e23a 1783 if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT))
66fd8ad5 1784 return sdhci_check_ro(host);
82b0e23a
TI		 1785
1786 ro_count = 0;
1787 for (i = 0; i < SAMPLE_COUNT; i++) {
66fd8ad5 1788 if (sdhci_check_ro(host)) {
82b0e23a
TI		 1789 if (++ro_count > SAMPLE_COUNT / 2)
1790 return 1;
1791 }
1792 msleep(30);
1793 }
1794 return 0;
1795}
1796
20758b66
AH		 1797static void sdhci_hw_reset(struct mmc_host *mmc)
1798{
1799 struct sdhci_host *host = mmc_priv(mmc);
1800
1801 if (host->ops && host->ops->hw_reset)
1802 host->ops->hw_reset(host);
1803}
1804
66fd8ad5
AH		 1805static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable)
1806{
be138554 1807 if (!(host->flags & SDHCI_DEVICE_DEAD)) {
ef104333 1808 if (enable)
b537f94c 1809 host->ier |= SDHCI_INT_CARD_INT;
ef104333 1810 else
b537f94c
RK		 1811 host->ier &= ~SDHCI_INT_CARD_INT;
1812
1813 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
1814 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
ef104333
RK		 1815 mmiowb();
1816 }
66fd8ad5
AH		 1817}
1818
1819static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
1820{
1821 struct sdhci_host *host = mmc_priv(mmc);
1822 unsigned long flags;
f75979b7 1823
66fd8ad5 1824 spin_lock_irqsave(&host->lock, flags);
ef104333
RK		 1825 if (enable)
1826 host->flags |= SDHCI_SDIO_IRQ_ENABLED;
1827 else
1828 host->flags &= ~SDHCI_SDIO_IRQ_ENABLED;
1829
66fd8ad5 1830 sdhci_enable_sdio_irq_nolock(host, enable);
f75979b7
PO		 1831 spin_unlock_irqrestore(&host->lock, flags);
1832}
1833
ded97e0b
DA		 1834static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
1835 struct mmc_ios *ios)
f2119df6 1836{
ded97e0b 1837 struct sdhci_host *host = mmc_priv(mmc);
20b92a30 1838 u16 ctrl;
6231f3de 1839 int ret;
f2119df6 1840
20b92a30
KL		 1841 /*
1842 * Signal Voltage Switching is only applicable for Host Controllers
1843 * v3.00 and above.
1844 */
1845 if (host->version < SDHCI_SPEC_300)
1846 return 0;
6231f3de 1847
f2119df6 1848 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
f2119df6 1849
21f5998f 1850 switch (ios->signal_voltage) {
20b92a30 1851 case MMC_SIGNAL_VOLTAGE_330:
8cb851a4
AH		 1852 if (!(host->flags & SDHCI_SIGNALING_330))
1853 return -EINVAL;
20b92a30
KL		 1854 /* Set 1.8V Signal Enable in the Host Control2 register to 0 */
1855 ctrl &= ~SDHCI_CTRL_VDD_180;
1856 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
f2119df6 1857
3a48edc4 1858 if (!IS_ERR(mmc->supply.vqmmc)) {
761daa36 1859 ret = mmc_regulator_set_vqmmc(mmc, ios);
20b92a30 1860 if (ret) {
6606110d
JP		 1861 pr_warn("%s: Switching to 3.3V signalling voltage failed\n",
1862 mmc_hostname(mmc));
20b92a30
KL		 1863 return -EIO;
1864 }
1865 }
1866 /* Wait for 5ms */
1867 usleep_range(5000, 5500);
f2119df6 1868
20b92a30
KL		 1869 /* 3.3V regulator output should be stable within 5 ms */
1870 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1871 if (!(ctrl & SDHCI_CTRL_VDD_180))
1872 return 0;
6231f3de 1873
6606110d
JP		 1874 pr_warn("%s: 3.3V regulator output did not became stable\n",
1875 mmc_hostname(mmc));
20b92a30
KL		 1876
1877 return -EAGAIN;
1878 case MMC_SIGNAL_VOLTAGE_180:
8cb851a4
AH		 1879 if (!(host->flags & SDHCI_SIGNALING_180))
1880 return -EINVAL;
3a48edc4 1881 if (!IS_ERR(mmc->supply.vqmmc)) {
761daa36 1882 ret = mmc_regulator_set_vqmmc(mmc, ios);
20b92a30 1883 if (ret) {
6606110d
JP		 1884 pr_warn("%s: Switching to 1.8V signalling voltage failed\n",
1885 mmc_hostname(mmc));
20b92a30
KL		 1886 return -EIO;
1887 }
1888 }
6231f3de 1889
6231f3de
PR		 1890 /*
1891 * Enable 1.8V Signal Enable in the Host Control2
1892 * register
1893 */
20b92a30
KL		 1894 ctrl |= SDHCI_CTRL_VDD_180;
1895 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
6231f3de 1896
9d967a61
VY		 1897 /* Some controller need to do more when switching */
1898 if (host->ops->voltage_switch)
1899 host->ops->voltage_switch(host);
1900
20b92a30
KL		 1901 /* 1.8V regulator output should be stable within 5 ms */
1902 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1903 if (ctrl & SDHCI_CTRL_VDD_180)
1904 return 0;
f2119df6 1905
6606110d
JP		 1906 pr_warn("%s: 1.8V regulator output did not became stable\n",
1907 mmc_hostname(mmc));
f2119df6 1908
20b92a30
KL		 1909 return -EAGAIN;
1910 case MMC_SIGNAL_VOLTAGE_120:
8cb851a4
AH		 1911 if (!(host->flags & SDHCI_SIGNALING_120))
1912 return -EINVAL;
3a48edc4 1913 if (!IS_ERR(mmc->supply.vqmmc)) {
761daa36 1914 ret = mmc_regulator_set_vqmmc(mmc, ios);
20b92a30 1915 if (ret) {
6606110d
JP		 1916 pr_warn("%s: Switching to 1.2V signalling voltage failed\n",
1917 mmc_hostname(mmc));
20b92a30 1918 return -EIO;
f2119df6
AN		 1919 }
1920 }
6231f3de 1921 return 0;
20b92a30 1922 default:
f2119df6
AN		 1923 /* No signal voltage switch required */
1924 return 0;
20b92a30 1925 }
f2119df6
AN		 1926}
1927
20b92a30
KL		 1928static int sdhci_card_busy(struct mmc_host *mmc)
1929{
1930 struct sdhci_host *host = mmc_priv(mmc);
1931 u32 present_state;
1932
e613cc47 1933 /* Check whether DAT[0] is 0 */
20b92a30 1934 present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
20b92a30 1935
e613cc47 1936 return !(present_state & SDHCI_DATA_0_LVL_MASK);
20b92a30
KL		 1937}
1938
b5540ce1
AH		 1939static int sdhci_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
1940{
1941 struct sdhci_host *host = mmc_priv(mmc);
1942 unsigned long flags;
1943
1944 spin_lock_irqsave(&host->lock, flags);
1945 host->flags |= SDHCI_HS400_TUNING;
1946 spin_unlock_irqrestore(&host->lock, flags);
1947
1948 return 0;
1949}
1950
069c9f14 1951static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
b513ea25 1952{
4b6f37d3 1953 struct sdhci_host *host = mmc_priv(mmc);
b513ea25 1954 u16 ctrl;
b513ea25 1955 int tuning_loop_counter = MAX_TUNING_LOOP;
b513ea25 1956 int err = 0;
2b35bd83 1957 unsigned long flags;
38e40bf5 1958 unsigned int tuning_count = 0;
b5540ce1 1959 bool hs400_tuning;
b513ea25 1960
2b35bd83 1961 spin_lock_irqsave(&host->lock, flags);
b513ea25 1962
b5540ce1
AH		 1963 hs400_tuning = host->flags & SDHCI_HS400_TUNING;
1964 host->flags &= ~SDHCI_HS400_TUNING;
1965
38e40bf5
AH		 1966 if (host->tuning_mode == SDHCI_TUNING_MODE_1)
1967 tuning_count = host->tuning_count;
1968
b513ea25 1969 /*
9faac7b9
WY		 1970 * The Host Controller needs tuning in case of SDR104 and DDR50
1971 * mode, and for SDR50 mode when Use Tuning for SDR50 is set in
1972 * the Capabilities register.
069c9f14
G		 1973 * If the Host Controller supports the HS200 mode then the
1974 * tuning function has to be executed.
b513ea25 1975 */
4b6f37d3 1976 switch (host->timing) {
b5540ce1 1977 /* HS400 tuning is done in HS200 mode */
e9fb05d5 1978 case MMC_TIMING_MMC_HS400:
b5540ce1
AH		 1979 err = -EINVAL;
1980 goto out_unlock;
1981
4b6f37d3 1982 case MMC_TIMING_MMC_HS200:
b5540ce1
AH		 1983 /*
1984 * Periodic re-tuning for HS400 is not expected to be needed, so
1985 * disable it here.
1986 */
1987 if (hs400_tuning)
1988 tuning_count = 0;
1989 break;
1990
4b6f37d3 1991 case MMC_TIMING_UHS_SDR104:
9faac7b9 1992 case MMC_TIMING_UHS_DDR50:
4b6f37d3
RK		 1993 break;
1994
1995 case MMC_TIMING_UHS_SDR50:
4228b213 1996 if (host->flags & SDHCI_SDR50_NEEDS_TUNING)
4b6f37d3
RK		 1997 break;
1998 /* FALLTHROUGH */
1999
2000 default:
d519c863 2001 goto out_unlock;
b513ea25
AN		 2002 }
2003
45251812 2004 if (host->ops->platform_execute_tuning) {
2b35bd83 2005 spin_unlock_irqrestore(&host->lock, flags);
45251812 2006 err = host->ops->platform_execute_tuning(host, opcode);
45251812
DA		 2007 return err;
2008 }
2009
4b6f37d3
RK		 2010 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2011 ctrl |= SDHCI_CTRL_EXEC_TUNING;
67d0d04a
VY		 2012 if (host->quirks2 & SDHCI_QUIRK2_TUNING_WORK_AROUND)
2013 ctrl |= SDHCI_CTRL_TUNED_CLK;
b513ea25
AN		 2014 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2015
2016 /*
2017 * As per the Host Controller spec v3.00, tuning command
2018 * generates Buffer Read Ready interrupt, so enable that.
2019 *
2020 * Note: The spec clearly says that when tuning sequence
2021 * is being performed, the controller does not generate
2022 * interrupts other than Buffer Read Ready interrupt. But
2023 * to make sure we don't hit a controller bug, we _only_
2024 * enable Buffer Read Ready interrupt here.
2025 */
b537f94c
RK		 2026 sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
2027 sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);
b513ea25
AN		 2028
2029 /*
2030 * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number
1473bdd5 2031 * of loops reaches 40 times.
b513ea25 2032 */
b513ea25
AN		 2033 do {
2034 struct mmc_command cmd = {0};
66fd8ad5 2035 struct mmc_request mrq = {NULL};
b513ea25 2036
069c9f14 2037 cmd.opcode = opcode;
b513ea25
AN		 2038 cmd.arg = 0;
2039 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
2040 cmd.retries = 0;
2041 cmd.data = NULL;
4e9f8fe5 2042 cmd.mrq = &mrq;
b513ea25
AN		 2043 cmd.error = 0;
2044
7ce45e95
AC		 2045 if (tuning_loop_counter-- == 0)
2046 break;
2047
b513ea25 2048 mrq.cmd = &cmd;
b513ea25
AN		 2049
2050 /*
2051 * In response to CMD19, the card sends 64 bytes of tuning
2052 * block to the Host Controller. So we set the block size
2053 * to 64 here.
2054 */
069c9f14
G		 2055 if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200) {
2056 if (mmc->ios.bus_width == MMC_BUS_WIDTH_8)
2057 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128),
2058 SDHCI_BLOCK_SIZE);
2059 else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4)
2060 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64),
2061 SDHCI_BLOCK_SIZE);
2062 } else {
2063 sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64),
2064 SDHCI_BLOCK_SIZE);
2065 }
b513ea25
AN		 2066
2067 /*
2068 * The tuning block is sent by the card to the host controller.
2069 * So we set the TRNS_READ bit in the Transfer Mode register.
2070 * This also takes care of setting DMA Enable and Multi Block
2071 * Select in the same register to 0.
2072 */
2073 sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
2074
2075 sdhci_send_command(host, &cmd);
2076
2077 host->cmd = NULL;
07c161bc 2078 sdhci_del_timer(host, &mrq);
b513ea25 2079
2b35bd83 2080 spin_unlock_irqrestore(&host->lock, flags);
b513ea25 2081 /* Wait for Buffer Read Ready interrupt */
622b5f35 2082 wait_event_timeout(host->buf_ready_int,
b513ea25
AN		 2083 (host->tuning_done == 1),
2084 msecs_to_jiffies(50));
2b35bd83 2085 spin_lock_irqsave(&host->lock, flags);
b513ea25
AN		 2086
2087 if (!host->tuning_done) {
2e4456f0 2088 pr_info(DRIVER_NAME ": Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock\n");
fe5fb2e3
AH		 2089
2090 sdhci_do_reset(host, SDHCI_RESET_CMD);
2091 sdhci_do_reset(host, SDHCI_RESET_DATA);
2092
b513ea25
AN		 2093 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2094 ctrl &= ~SDHCI_CTRL_TUNED_CLK;
2095 ctrl &= ~SDHCI_CTRL_EXEC_TUNING;
2096 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2097
2098 err = -EIO;
2099 goto out;
2100 }
2101
2102 host->tuning_done = 0;
2103
2104 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
197160d5
NS		 2105
2106 /* eMMC spec does not require a delay between tuning cycles */
2107 if (opcode == MMC_SEND_TUNING_BLOCK)
2108 mdelay(1);
b513ea25
AN		 2109 } while (ctrl & SDHCI_CTRL_EXEC_TUNING);
2110
2111 /*
2112 * The Host Driver has exhausted the maximum number of loops allowed,
2113 * so use fixed sampling frequency.
2114 */
7ce45e95 2115 if (tuning_loop_counter < 0) {
b513ea25
AN		 2116 ctrl &= ~SDHCI_CTRL_TUNED_CLK;
2117 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
7ce45e95
AC		 2118 }
2119 if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
2e4456f0 2120 pr_info(DRIVER_NAME ": Tuning procedure failed, falling back to fixed sampling clock\n");
114f2bf6 2121 err = -EIO;
b513ea25
AN		 2122 }
2123
2124out:
38e40bf5 2125 if (tuning_count) {
66c39dfc
AH		 2126 /*
2127 * In case tuning fails, host controllers which support
2128 * re-tuning can try tuning again at a later time, when the
2129 * re-tuning timer expires. So for these controllers, we
2130 * return 0. Since there might be other controllers who do not
2131 * have this capability, we return error for them.
2132 */
2133 err = 0;
cf2b5eea
AN		 2134 }
2135
66c39dfc 2136 host->mmc->retune_period = err ? 0 : tuning_count;
cf2b5eea 2137
b537f94c
RK		 2138 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2139 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
d519c863 2140out_unlock:
2b35bd83 2141 spin_unlock_irqrestore(&host->lock, flags);
b513ea25
AN		 2142 return err;
2143}
2144
cb849648
AH		 2145static int sdhci_select_drive_strength(struct mmc_card *card,
2146 unsigned int max_dtr, int host_drv,
2147 int card_drv, int *drv_type)
2148{
2149 struct sdhci_host *host = mmc_priv(card->host);
2150
2151 if (!host->ops->select_drive_strength)
2152 return 0;
2153
2154 return host->ops->select_drive_strength(host, card, max_dtr, host_drv,
2155 card_drv, drv_type);
2156}
52983382
KL		 2157
2158static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
4d55c5a1 2159{
4d55c5a1
AN		 2160 /* Host Controller v3.00 defines preset value registers */
2161 if (host->version < SDHCI_SPEC_300)
2162 return;
2163
4d55c5a1
AN		 2164 /*
2165 * We only enable or disable Preset Value if they are not already
2166 * enabled or disabled respectively. Otherwise, we bail out.
2167 */
da91a8f9
RK		 2168 if (host->preset_enabled != enable) {
2169 u16 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2170
2171 if (enable)
2172 ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE;
2173 else
2174 ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
2175
4d55c5a1 2176 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
da91a8f9
RK		 2177
2178 if (enable)
2179 host->flags |= SDHCI_PV_ENABLED;
2180 else
2181 host->flags &= ~SDHCI_PV_ENABLED;
2182
2183 host->preset_enabled = enable;
4d55c5a1 2184 }
66fd8ad5
AH		 2185}
2186
348487cb
HC		 2187static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
2188 int err)
2189{
2190 struct sdhci_host *host = mmc_priv(mmc);
2191 struct mmc_data *data = mrq->data;
2192
f48f039c 2193 if (data->host_cookie != COOKIE_UNMAPPED)
771a3dc2
RK		 2194 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
2195 data->flags & MMC_DATA_WRITE ?
2196 DMA_TO_DEVICE : DMA_FROM_DEVICE);
2197
2198 data->host_cookie = COOKIE_UNMAPPED;
348487cb
HC		 2199}
2200
348487cb
HC		 2201static void sdhci_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
2202 bool is_first_req)
2203{
2204 struct sdhci_host *host = mmc_priv(mmc);
2205
d31911b9 2206 mrq->data->host_cookie = COOKIE_UNMAPPED;
348487cb
HC		 2207
2208 if (host->flags & SDHCI_REQ_USE_DMA)
94538e51 2209 sdhci_pre_dma_transfer(host, mrq->data, COOKIE_PRE_MAPPED);
348487cb
HC		 2210}
2211
5d0d11c5
AH		 2212static inline bool sdhci_has_requests(struct sdhci_host *host)
2213{
2214 return host->cmd || host->data_cmd;
2215}
2216
2217static void sdhci_error_out_mrqs(struct sdhci_host *host, int err)
2218{
2219 if (host->data_cmd) {
2220 host->data_cmd->error = err;
2221 sdhci_finish_mrq(host, host->data_cmd->mrq);
2222 }
2223
2224 if (host->cmd) {
2225 host->cmd->error = err;
2226 sdhci_finish_mrq(host, host->cmd->mrq);
2227 }
2228}
2229
71e69211 2230static void sdhci_card_event(struct mmc_host *mmc)
d129bceb 2231{
71e69211 2232 struct sdhci_host *host = mmc_priv(mmc);
d129bceb 2233 unsigned long flags;
2836766a 2234 int present;
d129bceb 2235
722e1280
CD		 2236 /* First check if client has provided their own card event */
2237 if (host->ops->card_event)
2238 host->ops->card_event(host);
2239
d3940f27 2240 present = mmc->ops->get_cd(mmc);
2836766a 2241
d129bceb
PO		 2242 spin_lock_irqsave(&host->lock, flags);
2243
5d0d11c5
AH		 2244 /* Check sdhci_has_requests() first in case we are runtime suspended */
2245 if (sdhci_has_requests(host) && !present) {
a3c76eb9 2246 pr_err("%s: Card removed during transfer!\n",
66fd8ad5 2247 mmc_hostname(host->mmc));
a3c76eb9 2248 pr_err("%s: Resetting controller.\n",
66fd8ad5 2249 mmc_hostname(host->mmc));
d129bceb 2250
03231f9b
RK		 2251 sdhci_do_reset(host, SDHCI_RESET_CMD);
2252 sdhci_do_reset(host, SDHCI_RESET_DATA);
d129bceb 2253
5d0d11c5 2254 sdhci_error_out_mrqs(host, -ENOMEDIUM);
d129bceb
PO		 2255 }
2256
2257 spin_unlock_irqrestore(&host->lock, flags);
71e69211
GL		 2258}
2259
2260static const struct mmc_host_ops sdhci_ops = {
2261 .request = sdhci_request,
348487cb
HC		 2262 .post_req = sdhci_post_req,
2263 .pre_req = sdhci_pre_req,
71e69211 2264 .set_ios = sdhci_set_ios,
94144a46 2265 .get_cd = sdhci_get_cd,
71e69211
GL		 2266 .get_ro = sdhci_get_ro,
2267 .hw_reset = sdhci_hw_reset,
2268 .enable_sdio_irq = sdhci_enable_sdio_irq,
2269 .start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
b5540ce1 2270 .prepare_hs400_tuning = sdhci_prepare_hs400_tuning,
71e69211 2271 .execute_tuning = sdhci_execute_tuning,
cb849648 2272 .select_drive_strength = sdhci_select_drive_strength,
71e69211 2273 .card_event = sdhci_card_event,
20b92a30 2274 .card_busy = sdhci_card_busy,
71e69211
GL		 2275};
2276
2277/*****************************************************************************\
2278 * *
2279 * Tasklets *
2280 * *
2281\*****************************************************************************/
2282
4e9f8fe5 2283static bool sdhci_request_done(struct sdhci_host *host)
d129bceb 2284{
d129bceb
PO		 2285 unsigned long flags;
2286 struct mmc_request *mrq;
4e9f8fe5 2287 int i;
d129bceb 2288
66fd8ad5
AH		 2289 spin_lock_irqsave(&host->lock, flags);
2290
4e9f8fe5
AH		 2291 for (i = 0; i < SDHCI_MAX_MRQS; i++) {
2292 mrq = host->mrqs_done[i];
6ebebeab 2293 if (mrq)
4e9f8fe5 2294 break;
66fd8ad5 2295 }
d129bceb 2296
4e9f8fe5
AH		 2297 if (!mrq) {
2298 spin_unlock_irqrestore(&host->lock, flags);
2299 return true;
2300 }
d129bceb 2301
d7422fb4
AH		 2302 sdhci_del_timer(host, mrq);
2303
054cedff
RK		 2304 /*
2305 * Always unmap the data buffers if they were mapped by
2306 * sdhci_prepare_data() whenever we finish with a request.
2307 * This avoids leaking DMA mappings on error.
2308 */
2309 if (host->flags & SDHCI_REQ_USE_DMA) {
2310 struct mmc_data *data = mrq->data;
2311
2312 if (data && data->host_cookie == COOKIE_MAPPED) {
2313 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
2314 (data->flags & MMC_DATA_READ) ?
2315 DMA_FROM_DEVICE : DMA_TO_DEVICE);
2316 data->host_cookie = COOKIE_UNMAPPED;
2317 }
2318 }
2319
d129bceb
PO		 2320 /*
2321 * The controller needs a reset of internal state machines
2322 * upon error conditions.
2323 */
0cc563ce 2324 if (sdhci_needs_reset(host, mrq)) {
6ebebeab
AH		 2325 /*
2326 * Do not finish until command and data lines are available for
2327 * reset. Note there can only be one other mrq, so it cannot
2328 * also be in mrqs_done, otherwise host->cmd and host->data_cmd
2329 * would both be null.
2330 */
2331 if (host->cmd || host->data_cmd) {
2332 spin_unlock_irqrestore(&host->lock, flags);
2333 return true;
2334 }
2335
645289dc 2336 /* Some controllers need this kick or reset won't work here */
8213af3b 2337 if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)
645289dc 2338 /* This is to force an update */
1771059c 2339 host->ops->set_clock(host, host->clock);
645289dc
PO		 2340
2341 /* Spec says we should do both at the same time, but Ricoh
2342 controllers do not like that. */
6ebebeab
AH		 2343 sdhci_do_reset(host, SDHCI_RESET_CMD);
2344 sdhci_do_reset(host, SDHCI_RESET_DATA);
ed1563de
AH		 2345
2346 host->pending_reset = false;
d129bceb
PO		 2347 }
2348
4e9f8fe5
AH		 2349 if (!sdhci_has_requests(host))
2350 sdhci_led_deactivate(host);
d129bceb 2351
6ebebeab
AH		 2352 host->mrqs_done[i] = NULL;
2353
5f25a66f 2354 mmiowb();
d129bceb
PO		 2355 spin_unlock_irqrestore(&host->lock, flags);
2356
2357 mmc_request_done(host->mmc, mrq);
4e9f8fe5
AH		 2358
2359 return false;
2360}
2361
2362static void sdhci_tasklet_finish(unsigned long param)
2363{
2364 struct sdhci_host *host = (struct sdhci_host *)param;
2365
2366 while (!sdhci_request_done(host))
2367 ;
d129bceb
PO		 2368}
2369
2370static void sdhci_timeout_timer(unsigned long data)
2371{
2372 struct sdhci_host *host;
2373 unsigned long flags;
2374
2375 host = (struct sdhci_host*)data;
2376
2377 spin_lock_irqsave(&host->lock, flags);
2378
d7422fb4
AH		 2379 if (host->cmd && !sdhci_data_line_cmd(host->cmd)) {
2380 pr_err("%s: Timeout waiting for hardware cmd interrupt.\n",
2381 mmc_hostname(host->mmc));
2382 sdhci_dumpregs(host);
2383
2384 host->cmd->error = -ETIMEDOUT;
2385 sdhci_finish_mrq(host, host->cmd->mrq);
2386 }
2387
2388 mmiowb();
2389 spin_unlock_irqrestore(&host->lock, flags);
2390}
2391
2392static void sdhci_timeout_data_timer(unsigned long data)
2393{
2394 struct sdhci_host *host;
2395 unsigned long flags;
2396
2397 host = (struct sdhci_host *)data;
2398
2399 spin_lock_irqsave(&host->lock, flags);
2400
2401 if (host->data || host->data_cmd ||
2402 (host->cmd && sdhci_data_line_cmd(host->cmd))) {
2e4456f0
MV		 2403 pr_err("%s: Timeout waiting for hardware interrupt.\n",
2404 mmc_hostname(host->mmc));
d129bceb
PO		 2405 sdhci_dumpregs(host);
2406
2407 if (host->data) {
17b0429d 2408 host->data->error = -ETIMEDOUT;
d129bceb 2409 sdhci_finish_data(host);
d7422fb4
AH		 2410 } else if (host->data_cmd) {
2411 host->data_cmd->error = -ETIMEDOUT;
2412 sdhci_finish_mrq(host, host->data_cmd->mrq);
d129bceb 2413 } else {
d7422fb4
AH		 2414 host->cmd->error = -ETIMEDOUT;
2415 sdhci_finish_mrq(host, host->cmd->mrq);
d129bceb
PO		 2416 }
2417 }
2418
5f25a66f 2419 mmiowb();
d129bceb
PO		 2420 spin_unlock_irqrestore(&host->lock, flags);
2421}
2422
2423/*****************************************************************************\
2424 * *
2425 * Interrupt handling *
2426 * *
2427\*****************************************************************************/
2428
fc605f1d 2429static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
d129bceb 2430{
d129bceb 2431 if (!host->cmd) {
ed1563de
AH		 2432 /*
2433 * SDHCI recovers from errors by resetting the cmd and data
2434 * circuits. Until that is done, there very well might be more
2435 * interrupts, so ignore them in that case.
2436 */
2437 if (host->pending_reset)
2438 return;
2e4456f0
MV		 2439 pr_err("%s: Got command interrupt 0x%08x even though no command operation was in progress.\n",
2440 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 2441 sdhci_dumpregs(host);
2442 return;
2443 }
2444
ec014cba
RK		 2445 if (intmask & (SDHCI_INT_TIMEOUT | SDHCI_INT_CRC |
2446 SDHCI_INT_END_BIT | SDHCI_INT_INDEX)) {
2447 if (intmask & SDHCI_INT_TIMEOUT)
2448 host->cmd->error = -ETIMEDOUT;
2449 else
2450 host->cmd->error = -EILSEQ;
43b58b36 2451
71fcbda0
RK		 2452 /*
2453 * If this command initiates a data phase and a response
2454 * CRC error is signalled, the card can start transferring
2455 * data - the card may have received the command without
2456 * error. We must not terminate the mmc_request early.
2457 *
2458 * If the card did not receive the command or returned an
2459 * error which prevented it sending data, the data phase
2460 * will time out.
2461 */
2462 if (host->cmd->data &&
2463 (intmask & (SDHCI_INT_CRC | SDHCI_INT_TIMEOUT)) ==
2464 SDHCI_INT_CRC) {
2465 host->cmd = NULL;
2466 return;
2467 }
2468
a6d3bdd5 2469 sdhci_finish_mrq(host, host->cmd->mrq);
e809517f
PO		 2470 return;
2471 }
2472
e809517f 2473 if (intmask & SDHCI_INT_RESPONSE)
43b58b36 2474 sdhci_finish_command(host);
d129bceb
PO		 2475}
2476
0957c333 2477#ifdef CONFIG_MMC_DEBUG
08621b18 2478static void sdhci_adma_show_error(struct sdhci_host *host)
6882a8c0
BD		 2479{
2480 const char *name = mmc_hostname(host->mmc);
1c3d5f6d 2481 void *desc = host->adma_table;
6882a8c0
BD		 2482
2483 sdhci_dumpregs(host);
2484
2485 while (true) {
e57a5f61
AH		 2486 struct sdhci_adma2_64_desc *dma_desc = desc;
2487
2488 if (host->flags & SDHCI_USE_64_BIT_DMA)
2489 DBG("%s: %p: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n",
2490 name, desc, le32_to_cpu(dma_desc->addr_hi),
2491 le32_to_cpu(dma_desc->addr_lo),
2492 le16_to_cpu(dma_desc->len),
2493 le16_to_cpu(dma_desc->cmd));
2494 else
2495 DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n",
2496 name, desc, le32_to_cpu(dma_desc->addr_lo),
2497 le16_to_cpu(dma_desc->len),
2498 le16_to_cpu(dma_desc->cmd));
6882a8c0 2499
76fe379a 2500 desc += host->desc_sz;
6882a8c0 2501
0545230f 2502 if (dma_desc->cmd & cpu_to_le16(ADMA2_END))
6882a8c0
BD		 2503 break;
2504 }
2505}
2506#else
08621b18 2507static void sdhci_adma_show_error(struct sdhci_host *host) { }
6882a8c0
BD		 2508#endif
2509
d129bceb
PO		 2510static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
2511{
069c9f14 2512 u32 command;
d129bceb 2513
b513ea25
AN		 2514 /* CMD19 generates _only_ Buffer Read Ready interrupt */
2515 if (intmask & SDHCI_INT_DATA_AVAIL) {
069c9f14
G		 2516 command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND));
2517 if (command == MMC_SEND_TUNING_BLOCK ||
2518 command == MMC_SEND_TUNING_BLOCK_HS200) {
b513ea25
AN		 2519 host->tuning_done = 1;
2520 wake_up(&host->buf_ready_int);
2521 return;
2522 }
2523 }
2524
d129bceb 2525 if (!host->data) {
7c89a3d9
AH		 2526 struct mmc_command *data_cmd = host->data_cmd;
2527
d129bceb 2528 /*
e809517f
PO		 2529 * The "data complete" interrupt is also used to
2530 * indicate that a busy state has ended. See comment
2531 * above in sdhci_cmd_irq().
d129bceb 2532 */
7c89a3d9 2533 if (data_cmd && (data_cmd->flags & MMC_RSP_BUSY)) {
c5abd5e8 2534 if (intmask & SDHCI_INT_DATA_TIMEOUT) {
69b962a6 2535 host->data_cmd = NULL;
7c89a3d9 2536 data_cmd->error = -ETIMEDOUT;
a6d3bdd5 2537 sdhci_finish_mrq(host, data_cmd->mrq);
c5abd5e8
MC		 2538 return;
2539 }
e809517f 2540 if (intmask & SDHCI_INT_DATA_END) {
69b962a6 2541 host->data_cmd = NULL;
e99783a4
CM		 2542 /*
2543 * Some cards handle busy-end interrupt
2544 * before the command completed, so make
2545 * sure we do things in the proper order.
2546 */
ea968023
AH		 2547 if (host->cmd == data_cmd)
2548 return;
2549
a6d3bdd5 2550 sdhci_finish_mrq(host, data_cmd->mrq);
e809517f
PO		 2551 return;
2552 }
2553 }
d129bceb 2554
ed1563de
AH		 2555 /*
2556 * SDHCI recovers from errors by resetting the cmd and data
2557 * circuits. Until that is done, there very well might be more
2558 * interrupts, so ignore them in that case.
2559 */
2560 if (host->pending_reset)
2561 return;
2562
2e4456f0
MV		 2563 pr_err("%s: Got data interrupt 0x%08x even though no data operation was in progress.\n",
2564 mmc_hostname(host->mmc), (unsigned)intmask);
d129bceb
PO		 2565 sdhci_dumpregs(host);
2566
2567 return;
2568 }
2569
2570 if (intmask & SDHCI_INT_DATA_TIMEOUT)
17b0429d 2571 host->data->error = -ETIMEDOUT;
22113efd
AL		 2572 else if (intmask & SDHCI_INT_DATA_END_BIT)
2573 host->data->error = -EILSEQ;
2574 else if ((intmask & SDHCI_INT_DATA_CRC) &&
2575 SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))
2576 != MMC_BUS_TEST_R)
17b0429d 2577 host->data->error = -EILSEQ;
6882a8c0 2578 else if (intmask & SDHCI_INT_ADMA_ERROR) {
a3c76eb9 2579 pr_err("%s: ADMA error\n", mmc_hostname(host->mmc));
08621b18 2580 sdhci_adma_show_error(host);
2134a922 2581 host->data->error = -EIO;
a4071fbb
HZ		 2582 if (host->ops->adma_workaround)
2583 host->ops->adma_workaround(host, intmask);
6882a8c0 2584 }
d129bceb 2585
17b0429d 2586 if (host->data->error)
d129bceb
PO		 2587 sdhci_finish_data(host);
2588 else {
a406f5a3 2589 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
d129bceb
PO		 2590 sdhci_transfer_pio(host);
2591
6ba736a1
PO		 2592 /*
2593 * We currently don't do anything fancy with DMA
2594 * boundaries, but as we can't disable the feature
2595 * we need to at least restart the transfer.
f6a03cbf
MV		 2596 *
2597 * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS)
2598 * should return a valid address to continue from, but as
2599 * some controllers are faulty, don't trust them.
6ba736a1 2600 */
f6a03cbf
MV		 2601 if (intmask & SDHCI_INT_DMA_END) {
2602 u32 dmastart, dmanow;
2603 dmastart = sg_dma_address(host->data->sg);
2604 dmanow = dmastart + host->data->bytes_xfered;
2605 /*
2606 * Force update to the next DMA block boundary.
2607 */
2608 dmanow = (dmanow &
2609 ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
2610 SDHCI_DEFAULT_BOUNDARY_SIZE;
2611 host->data->bytes_xfered = dmanow - dmastart;
2612 DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes,"
2613 " next 0x%08x\n",
2614 mmc_hostname(host->mmc), dmastart,
2615 host->data->bytes_xfered, dmanow);
2616 sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
2617 }
6ba736a1 2618
e538fbe8 2619 if (intmask & SDHCI_INT_DATA_END) {
7c89a3d9 2620 if (host->cmd == host->data_cmd) {
e538fbe8
PO		 2621 /*
2622 * Data managed to finish before the
2623 * command completed. Make sure we do
2624 * things in the proper order.
2625 */
2626 host->data_early = 1;
2627 } else {
2628 sdhci_finish_data(host);
2629 }
2630 }
d129bceb
PO		 2631 }
2632}
2633
7d12e780 2634static irqreturn_t sdhci_irq(int irq, void *dev_id)
d129bceb 2635{
781e989c 2636 irqreturn_t result = IRQ_NONE;
66fd8ad5 2637 struct sdhci_host *host = dev_id;
41005003 2638 u32 intmask, mask, unexpected = 0;
781e989c 2639 int max_loops = 16;
d129bceb
PO		 2640
2641 spin_lock(&host->lock);
2642
be138554 2643 if (host->runtime_suspended && !sdhci_sdio_irq_enabled(host)) {
66fd8ad5 2644 spin_unlock(&host->lock);
655bca76 2645 return IRQ_NONE;
66fd8ad5
AH		 2646 }
2647
4e4141a5 2648 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
62df67a5 2649 if (!intmask || intmask == 0xffffffff) {
d129bceb
PO		 2650 result = IRQ_NONE;
2651 goto out;
2652 }
2653
41005003
RK		 2654 do {
2655 /* Clear selected interrupts. */
2656 mask = intmask & (SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |
2657 SDHCI_INT_BUS_POWER);
2658 sdhci_writel(host, mask, SDHCI_INT_STATUS);
d129bceb 2659
41005003
RK		 2660 DBG("*** %s got interrupt: 0x%08x\n",
2661 mmc_hostname(host->mmc), intmask);
d129bceb 2662
41005003
RK		 2663 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
2664 u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
2665 SDHCI_CARD_PRESENT;
d129bceb 2666
41005003
RK		 2667 /*
2668 * There is a observation on i.mx esdhc. INSERT
2669 * bit will be immediately set again when it gets
2670 * cleared, if a card is inserted. We have to mask
2671 * the irq to prevent interrupt storm which will
2672 * freeze the system. And the REMOVE gets the
2673 * same situation.
2674 *
2675 * More testing are needed here to ensure it works
2676 * for other platforms though.
2677 */
b537f94c
RK		 2678 host->ier &= ~(SDHCI_INT_CARD_INSERT |
2679 SDHCI_INT_CARD_REMOVE);
2680 host->ier |= present ? SDHCI_INT_CARD_REMOVE :
2681 SDHCI_INT_CARD_INSERT;
2682 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2683 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
41005003
RK		 2684
2685 sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT |
2686 SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
3560db8e
RK		 2687
2688 host->thread_isr |= intmask & (SDHCI_INT_CARD_INSERT |
2689 SDHCI_INT_CARD_REMOVE);
2690 result = IRQ_WAKE_THREAD;
41005003 2691 }
d129bceb 2692
41005003 2693 if (intmask & SDHCI_INT_CMD_MASK)
fc605f1d 2694 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
964f9ce2 2695
41005003
RK		 2696 if (intmask & SDHCI_INT_DATA_MASK)
2697 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
d129bceb 2698
41005003
RK		 2699 if (intmask & SDHCI_INT_BUS_POWER)
2700 pr_err("%s: Card is consuming too much power!\n",
2701 mmc_hostname(host->mmc));
3192a28f 2702
f37b20eb
DA		 2703 if (intmask & SDHCI_INT_RETUNE)
2704 mmc_retune_needed(host->mmc);
2705
781e989c
RK		 2706 if (intmask & SDHCI_INT_CARD_INT) {
2707 sdhci_enable_sdio_irq_nolock(host, false);
2708 host->thread_isr |= SDHCI_INT_CARD_INT;
2709 result = IRQ_WAKE_THREAD;
2710 }
f75979b7 2711
41005003
RK		 2712 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE |
2713 SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |
2714 SDHCI_INT_ERROR | SDHCI_INT_BUS_POWER |
f37b20eb 2715 SDHCI_INT_RETUNE | SDHCI_INT_CARD_INT);
f75979b7 2716
41005003
RK		 2717 if (intmask) {
2718 unexpected |= intmask;
2719 sdhci_writel(host, intmask, SDHCI_INT_STATUS);
2720 }
d129bceb 2721
781e989c
RK		 2722 if (result == IRQ_NONE)
2723 result = IRQ_HANDLED;
d129bceb 2724
41005003 2725 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
41005003 2726 } while (intmask && --max_loops);
d129bceb
PO		 2727out:
2728 spin_unlock(&host->lock);
2729
6379b237
AS		 2730 if (unexpected) {
2731 pr_err("%s: Unexpected interrupt 0x%08x.\n",
2732 mmc_hostname(host->mmc), unexpected);
2733 sdhci_dumpregs(host);
2734 }
f75979b7 2735
d129bceb
PO		 2736 return result;
2737}
2738
781e989c
RK		 2739static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
2740{
2741 struct sdhci_host *host = dev_id;
2742 unsigned long flags;
2743 u32 isr;
2744
2745 spin_lock_irqsave(&host->lock, flags);
2746 isr = host->thread_isr;
2747 host->thread_isr = 0;
2748 spin_unlock_irqrestore(&host->lock, flags);
2749
3560db8e 2750 if (isr & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
d3940f27
AH		 2751 struct mmc_host *mmc = host->mmc;
2752
2753 mmc->ops->card_event(mmc);
2754 mmc_detect_change(mmc, msecs_to_jiffies(200));
3560db8e
RK		 2755 }
2756
781e989c
RK		 2757 if (isr & SDHCI_INT_CARD_INT) {
2758 sdio_run_irqs(host->mmc);
2759
2760 spin_lock_irqsave(&host->lock, flags);
2761 if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
2762 sdhci_enable_sdio_irq_nolock(host, true);
2763 spin_unlock_irqrestore(&host->lock, flags);
2764 }
2765
2766 return isr ? IRQ_HANDLED : IRQ_NONE;
2767}
2768
d129bceb
PO		 2769/*****************************************************************************\
2770 * *
2771 * Suspend/resume *
2772 * *
2773\*****************************************************************************/
2774
2775#ifdef CONFIG_PM
84d62605
LD		 2776/*
2777 * To enable wakeup events, the corresponding events have to be enabled in
2778 * the Interrupt Status Enable register too. See 'Table 1-6: Wakeup Signal
2779 * Table' in the SD Host Controller Standard Specification.
2780 * It is useless to restore SDHCI_INT_ENABLE state in
2781 * sdhci_disable_irq_wakeups() since it will be set by
2782 * sdhci_enable_card_detection() or sdhci_init().
2783 */
ad080d79
KL		 2784void sdhci_enable_irq_wakeups(struct sdhci_host *host)
2785{
2786 u8 val;
2787 u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
2788 | SDHCI_WAKE_ON_INT;
84d62605
LD		 2789 u32 irq_val = SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE |
2790 SDHCI_INT_CARD_INT;
ad080d79
KL		 2791
2792 val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
2793 val |= mask ;
2794 /* Avoid fake wake up */
84d62605 2795 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) {
ad080d79 2796 val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE);
84d62605
LD		 2797 irq_val &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
2798 }
ad080d79 2799 sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
84d62605 2800 sdhci_writel(host, irq_val, SDHCI_INT_ENABLE);
ad080d79
KL		 2801}
2802EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups);
2803
0b10f478 2804static void sdhci_disable_irq_wakeups(struct sdhci_host *host)
ad080d79
KL		 2805{
2806 u8 val;
2807 u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
2808 | SDHCI_WAKE_ON_INT;
2809
2810 val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
2811 val &= ~mask;
2812 sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
2813}
d129bceb 2814
29495aa0 2815int sdhci_suspend_host(struct sdhci_host *host)
d129bceb 2816{
7260cf5e
AV		 2817 sdhci_disable_card_detection(host);
2818
66c39dfc 2819 mmc_retune_timer_stop(host->mmc);
f37b20eb
DA		 2820 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
2821 mmc_retune_needed(host->mmc);
cf2b5eea 2822
ad080d79 2823 if (!device_may_wakeup(mmc_dev(host->mmc))) {
b537f94c
RK		 2824 host->ier = 0;
2825 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
2826 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
ad080d79
KL		 2827 free_irq(host->irq, host);
2828 } else {
2829 sdhci_enable_irq_wakeups(host);
2830 enable_irq_wake(host->irq);
2831 }
4ee14ec6 2832 return 0;
d129bceb
PO		 2833}
2834
b8c86fc5 2835EXPORT_SYMBOL_GPL(sdhci_suspend_host);
d129bceb 2836
b8c86fc5
PO		 2837int sdhci_resume_host(struct sdhci_host *host)
2838{
d3940f27 2839 struct mmc_host *mmc = host->mmc;
4ee14ec6 2840 int ret = 0;
d129bceb 2841
a13abc7b 2842 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
b8c86fc5
PO		 2843 if (host->ops->enable_dma)
2844 host->ops->enable_dma(host);
2845 }
d129bceb 2846
6308d290
AH		 2847 if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) &&
2848 (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) {
2849 /* Card keeps power but host controller does not */
2850 sdhci_init(host, 0);
2851 host->pwr = 0;
2852 host->clock = 0;
d3940f27 2853 mmc->ops->set_ios(mmc, &mmc->ios);
6308d290
AH		 2854 } else {
2855 sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
2856 mmiowb();
2857 }
b8c86fc5 2858
14a7b416
HC		 2859 if (!device_may_wakeup(mmc_dev(host->mmc))) {
2860 ret = request_threaded_irq(host->irq, sdhci_irq,
2861 sdhci_thread_irq, IRQF_SHARED,
2862 mmc_hostname(host->mmc), host);
2863 if (ret)
2864 return ret;
2865 } else {
2866 sdhci_disable_irq_wakeups(host);
2867 disable_irq_wake(host->irq);
2868 }
2869
7260cf5e
AV		 2870 sdhci_enable_card_detection(host);
2871
2f4cbb3d 2872 return ret;
d129bceb
PO		 2873}
2874
b8c86fc5 2875EXPORT_SYMBOL_GPL(sdhci_resume_host);
66fd8ad5 2876
66fd8ad5
AH		 2877int sdhci_runtime_suspend_host(struct sdhci_host *host)
2878{
2879 unsigned long flags;
66fd8ad5 2880
66c39dfc 2881 mmc_retune_timer_stop(host->mmc);
f37b20eb
DA		 2882 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
2883 mmc_retune_needed(host->mmc);
66fd8ad5
AH		 2884
2885 spin_lock_irqsave(&host->lock, flags);
b537f94c
RK		 2886 host->ier &= SDHCI_INT_CARD_INT;
2887 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2888 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
66fd8ad5
AH		 2889 spin_unlock_irqrestore(&host->lock, flags);
2890
781e989c 2891 synchronize_hardirq(host->irq);
66fd8ad5
AH		 2892
2893 spin_lock_irqsave(&host->lock, flags);
2894 host->runtime_suspended = true;
2895 spin_unlock_irqrestore(&host->lock, flags);
2896
8a125bad 2897 return 0;
66fd8ad5
AH		 2898}
2899EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
2900
2901int sdhci_runtime_resume_host(struct sdhci_host *host)
2902{
d3940f27 2903 struct mmc_host *mmc = host->mmc;
66fd8ad5 2904 unsigned long flags;
8a125bad 2905 int host_flags = host->flags;
66fd8ad5
AH		 2906
2907 if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
2908 if (host->ops->enable_dma)
2909 host->ops->enable_dma(host);
2910 }
2911
2912 sdhci_init(host, 0);
2913
2914 /* Force clock and power re-program */
2915 host->pwr = 0;
2916 host->clock = 0;
d3940f27
AH		 2917 mmc->ops->start_signal_voltage_switch(mmc, &mmc->ios);
2918 mmc->ops->set_ios(mmc, &mmc->ios);
66fd8ad5 2919
52983382
KL		 2920 if ((host_flags & SDHCI_PV_ENABLED) &&
2921 !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
2922 spin_lock_irqsave(&host->lock, flags);
2923 sdhci_enable_preset_value(host, true);
2924 spin_unlock_irqrestore(&host->lock, flags);
2925 }
66fd8ad5 2926
086b0ddb
AH		 2927 if ((mmc->caps2 & MMC_CAP2_HS400_ES) &&
2928 mmc->ops->hs400_enhanced_strobe)
2929 mmc->ops->hs400_enhanced_strobe(mmc, &mmc->ios);
2930
66fd8ad5
AH		 2931 spin_lock_irqsave(&host->lock, flags);
2932
2933 host->runtime_suspended = false;
2934
2935 /* Enable SDIO IRQ */
ef104333 2936 if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
66fd8ad5
AH		 2937 sdhci_enable_sdio_irq_nolock(host, true);
2938
2939 /* Enable Card Detection */
2940 sdhci_enable_card_detection(host);
2941
2942 spin_unlock_irqrestore(&host->lock, flags);
2943
8a125bad 2944 return 0;
66fd8ad5
AH		 2945}
2946EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host);
2947
162d6f98 2948#endif /* CONFIG_PM */
66fd8ad5 2949
d129bceb
PO		 2950/*****************************************************************************\
2951 * *
b8c86fc5 2952 * Device allocation/registration *
d129bceb
PO		 2953 * *
2954\*****************************************************************************/
2955
b8c86fc5
PO		 2956struct sdhci_host *sdhci_alloc_host(struct device *dev,
2957 size_t priv_size)
d129bceb 2958{
d129bceb
PO		 2959 struct mmc_host *mmc;
2960 struct sdhci_host *host;
2961
b8c86fc5 2962 WARN_ON(dev == NULL);
d129bceb 2963
b8c86fc5 2964 mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev);
d129bceb 2965 if (!mmc)
b8c86fc5 2966 return ERR_PTR(-ENOMEM);
d129bceb
PO		 2967
2968 host = mmc_priv(mmc);
2969 host->mmc = mmc;
bf60e592
AH		 2970 host->mmc_host_ops = sdhci_ops;
2971 mmc->ops = &host->mmc_host_ops;
d129bceb 2972
8cb851a4
AH		 2973 host->flags = SDHCI_SIGNALING_330;
2974
b8c86fc5
PO		 2975 return host;
2976}
8a4da143 2977
b8c86fc5 2978EXPORT_SYMBOL_GPL(sdhci_alloc_host);
d129bceb 2979
7b91369b
AC		 2980static int sdhci_set_dma_mask(struct sdhci_host *host)
2981{
2982 struct mmc_host *mmc = host->mmc;
2983 struct device *dev = mmc_dev(mmc);
2984 int ret = -EINVAL;
2985
2986 if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA)
2987 host->flags &= ~SDHCI_USE_64_BIT_DMA;
2988
2989 /* Try 64-bit mask if hardware is capable of it */
2990 if (host->flags & SDHCI_USE_64_BIT_DMA) {
2991 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
2992 if (ret) {
2993 pr_warn("%s: Failed to set 64-bit DMA mask.\n",
2994 mmc_hostname(mmc));
2995 host->flags &= ~SDHCI_USE_64_BIT_DMA;
2996 }
2997 }
2998
2999 /* 32-bit mask as default & fallback */
3000 if (ret) {
3001 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
3002 if (ret)
3003 pr_warn("%s: Failed to set 32-bit DMA mask.\n",
3004 mmc_hostname(mmc));
3005 }
3006
3007 return ret;
3008}
3009
6132a3bf
AH		 3010void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps, u32 *caps1)
3011{
3012 u16 v;
3013
3014 if (host->read_caps)
3015 return;
3016
3017 host->read_caps = true;
3018
3019 if (debug_quirks)
3020 host->quirks = debug_quirks;
3021
3022 if (debug_quirks2)
3023 host->quirks2 = debug_quirks2;
3024
3025 sdhci_do_reset(host, SDHCI_RESET_ALL);
3026
3027 v = ver ? *ver : sdhci_readw(host, SDHCI_HOST_VERSION);
3028 host->version = (v & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
3029
3030 if (host->quirks & SDHCI_QUIRK_MISSING_CAPS)
3031 return;
3032
3033 host->caps = caps ? *caps : sdhci_readl(host, SDHCI_CAPABILITIES);
3034
3035 if (host->version < SDHCI_SPEC_300)
3036 return;
3037
3038 host->caps1 = caps1 ? *caps1 : sdhci_readl(host, SDHCI_CAPABILITIES_1);
3039}
3040EXPORT_SYMBOL_GPL(__sdhci_read_caps);
3041
52f5336d 3042int sdhci_setup_host(struct sdhci_host *host)
b8c86fc5
PO		 3043{
3044 struct mmc_host *mmc;
f2119df6
AN		 3045 u32 max_current_caps;
3046 unsigned int ocr_avail;
f5fa92e5 3047 unsigned int override_timeout_clk;
59241757 3048 u32 max_clk;
b8c86fc5 3049 int ret;
d129bceb 3050
b8c86fc5
PO		 3051 WARN_ON(host == NULL);
3052 if (host == NULL)
3053 return -EINVAL;
d129bceb 3054
b8c86fc5 3055 mmc = host->mmc;
d129bceb 3056
efba142b
JH		 3057 /*
3058 * If there are external regulators, get them. Note this must be done
3059 * early before resetting the host and reading the capabilities so that
3060 * the host can take the appropriate action if regulators are not
3061 * available.
3062 */
3063 ret = mmc_regulator_get_supply(mmc);
3064 if (ret == -EPROBE_DEFER)
3065 return ret;
3066
6132a3bf 3067 sdhci_read_caps(host);
d129bceb 3068
f5fa92e5
AH		 3069 override_timeout_clk = host->timeout_clk;
3070
85105c53 3071 if (host->version > SDHCI_SPEC_300) {
2e4456f0
MV		 3072 pr_err("%s: Unknown controller version (%d). You may experience problems.\n",
3073 mmc_hostname(mmc), host->version);
4a965505
PO		 3074 }
3075
b8c86fc5 3076 if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
a13abc7b 3077 host->flags |= SDHCI_USE_SDMA;
28da3589 3078 else if (!(host->caps & SDHCI_CAN_DO_SDMA))
a13abc7b 3079 DBG("Controller doesn't have SDMA capability\n");
67435274 3080 else
a13abc7b 3081 host->flags |= SDHCI_USE_SDMA;
d129bceb 3082
b8c86fc5 3083 if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
a13abc7b 3084 (host->flags & SDHCI_USE_SDMA)) {
cee687ce 3085 DBG("Disabling DMA as it is marked broken\n");
a13abc7b 3086 host->flags &= ~SDHCI_USE_SDMA;
7c168e3d
FT		 3087 }
3088
f2119df6 3089 if ((host->version >= SDHCI_SPEC_200) &&
28da3589 3090 (host->caps & SDHCI_CAN_DO_ADMA2))
a13abc7b 3091 host->flags |= SDHCI_USE_ADMA;
2134a922
PO		 3092
3093 if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
3094 (host->flags & SDHCI_USE_ADMA)) {
3095 DBG("Disabling ADMA as it is marked broken\n");
3096 host->flags &= ~SDHCI_USE_ADMA;
3097 }
3098
e57a5f61
AH		 3099 /*
3100 * It is assumed that a 64-bit capable device has set a 64-bit DMA mask
3101 * and *must* do 64-bit DMA. A driver has the opportunity to change
3102 * that during the first call to ->enable_dma(). Similarly
3103 * SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to
3104 * implement.
3105 */
28da3589 3106 if (host->caps & SDHCI_CAN_64BIT)
e57a5f61
AH		 3107 host->flags |= SDHCI_USE_64_BIT_DMA;
3108
a13abc7b 3109 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
7b91369b
AC		 3110 ret = sdhci_set_dma_mask(host);
3111
3112 if (!ret && host->ops->enable_dma)
3113 ret = host->ops->enable_dma(host);
3114
3115 if (ret) {
3116 pr_warn("%s: No suitable DMA available - falling back to PIO\n",
3117 mmc_hostname(mmc));
3118 host->flags &= ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA);
3119
3120 ret = 0;
d129bceb
PO		 3121 }
3122 }
3123
e57a5f61
AH		 3124 /* SDMA does not support 64-bit DMA */
3125 if (host->flags & SDHCI_USE_64_BIT_DMA)
3126 host->flags &= ~SDHCI_USE_SDMA;
3127
2134a922 3128 if (host->flags & SDHCI_USE_ADMA) {
e66e61cb
RK		 3129 dma_addr_t dma;
3130 void *buf;
3131
2134a922 3132 /*
76fe379a
AH		 3133 * The DMA descriptor table size is calculated as the maximum
3134 * number of segments times 2, to allow for an alignment
3135 * descriptor for each segment, plus 1 for a nop end descriptor,
3136 * all multipled by the descriptor size.
2134a922 3137 */
e57a5f61
AH		 3138 if (host->flags & SDHCI_USE_64_BIT_DMA) {
3139 host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) *
3140 SDHCI_ADMA2_64_DESC_SZ;
e57a5f61 3141 host->desc_sz = SDHCI_ADMA2_64_DESC_SZ;
e57a5f61
AH		 3142 } else {
3143 host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) *
3144 SDHCI_ADMA2_32_DESC_SZ;
e57a5f61 3145 host->desc_sz = SDHCI_ADMA2_32_DESC_SZ;
e57a5f61 3146 }
e66e61cb 3147
04a5ae6f 3148 host->align_buffer_sz = SDHCI_MAX_SEGS * SDHCI_ADMA2_ALIGN;
e66e61cb
RK		 3149 buf = dma_alloc_coherent(mmc_dev(mmc), host->align_buffer_sz +
3150 host->adma_table_sz, &dma, GFP_KERNEL);
3151 if (!buf) {
6606110d 3152 pr_warn("%s: Unable to allocate ADMA buffers - falling back to standard DMA\n",
2134a922
PO		 3153 mmc_hostname(mmc));
3154 host->flags &= ~SDHCI_USE_ADMA;
e66e61cb
RK		 3155 } else if ((dma + host->align_buffer_sz) &
3156 (SDHCI_ADMA2_DESC_ALIGN - 1)) {
6606110d
JP		 3157 pr_warn("%s: unable to allocate aligned ADMA descriptor\n",
3158 mmc_hostname(mmc));
d1e49f77 3159 host->flags &= ~SDHCI_USE_ADMA;
e66e61cb
RK		 3160 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
3161 host->adma_table_sz, buf, dma);
3162 } else {
3163 host->align_buffer = buf;
3164 host->align_addr = dma;
edd63fcc 3165
e66e61cb
RK		 3166 host->adma_table = buf + host->align_buffer_sz;
3167 host->adma_addr = dma + host->align_buffer_sz;
3168 }
2134a922
PO		 3169 }
3170
7659150c
PO		 3171 /*
3172 * If we use DMA, then it's up to the caller to set the DMA
3173 * mask, but PIO does not need the hw shim so we set a new
3174 * mask here in that case.
3175 */
a13abc7b 3176 if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) {
7659150c 3177 host->dma_mask = DMA_BIT_MASK(64);
4e743f1f 3178 mmc_dev(mmc)->dma_mask = &host->dma_mask;
7659150c 3179 }
d129bceb 3180
c4687d5f 3181 if (host->version >= SDHCI_SPEC_300)
28da3589 3182 host->max_clk = (host->caps & SDHCI_CLOCK_V3_BASE_MASK)
c4687d5f
ZG		 3183 >> SDHCI_CLOCK_BASE_SHIFT;
3184 else
28da3589 3185 host->max_clk = (host->caps & SDHCI_CLOCK_BASE_MASK)
c4687d5f
ZG		 3186 >> SDHCI_CLOCK_BASE_SHIFT;
3187
4240ff0a 3188 host->max_clk *= 1000000;
f27f47ef
AV		 3189 if (host->max_clk == 0 || host->quirks &
3190 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) {
4240ff0a 3191 if (!host->ops->get_max_clock) {
2e4456f0
MV		 3192 pr_err("%s: Hardware doesn't specify base clock frequency.\n",
3193 mmc_hostname(mmc));
eb5c20de
AH		 3194 ret = -ENODEV;
3195 goto undma;
4240ff0a
BD		 3196 }
3197 host->max_clk = host->ops->get_max_clock(host);
8ef1a143 3198 }
d129bceb 3199
c3ed3877
AN		 3200 /*
3201 * In case of Host Controller v3.00, find out whether clock
3202 * multiplier is supported.
3203 */
28da3589 3204 host->clk_mul = (host->caps1 & SDHCI_CLOCK_MUL_MASK) >>
c3ed3877
AN		 3205 SDHCI_CLOCK_MUL_SHIFT;
3206
3207 /*
3208 * In case the value in Clock Multiplier is 0, then programmable
3209 * clock mode is not supported, otherwise the actual clock
3210 * multiplier is one more than the value of Clock Multiplier
3211 * in the Capabilities Register.
3212 */
3213 if (host->clk_mul)
3214 host->clk_mul += 1;
3215
d129bceb
PO		 3216 /*
3217 * Set host parameters.
3218 */
59241757
DA		 3219 max_clk = host->max_clk;
3220
ce5f036b 3221 if (host->ops->get_min_clock)
a9e58f25 3222 mmc->f_min = host->ops->get_min_clock(host);
c3ed3877
AN		 3223 else if (host->version >= SDHCI_SPEC_300) {
3224 if (host->clk_mul) {
3225 mmc->f_min = (host->max_clk * host->clk_mul) / 1024;
59241757 3226 max_clk = host->max_clk * host->clk_mul;
c3ed3877
AN		 3227 } else
3228 mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300;
3229 } else
0397526d 3230 mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200;
15ec4461 3231
d310ae49 3232 if (!mmc->f_max || mmc->f_max > max_clk)
59241757
DA		 3233 mmc->f_max = max_clk;
3234
28aab053 3235 if (!(host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) {
28da3589 3236 host->timeout_clk = (host->caps & SDHCI_TIMEOUT_CLK_MASK) >>
28aab053
AD		 3237 SDHCI_TIMEOUT_CLK_SHIFT;
3238 if (host->timeout_clk == 0) {
3239 if (host->ops->get_timeout_clock) {
3240 host->timeout_clk =
3241 host->ops->get_timeout_clock(host);
3242 } else {
3243 pr_err("%s: Hardware doesn't specify timeout clock frequency.\n",
3244 mmc_hostname(mmc));
eb5c20de
AH		 3245 ret = -ENODEV;
3246 goto undma;
28aab053 3247 }
272308ca 3248 }
272308ca 3249
28da3589 3250 if (host->caps & SDHCI_TIMEOUT_CLK_UNIT)
28aab053 3251 host->timeout_clk *= 1000;
272308ca 3252
99513624
AH		 3253 if (override_timeout_clk)
3254 host->timeout_clk = override_timeout_clk;
3255
28aab053 3256 mmc->max_busy_timeout = host->ops->get_max_timeout_count ?
a6ff5aeb 3257 host->ops->get_max_timeout_count(host) : 1 << 27;
28aab053
AD		 3258 mmc->max_busy_timeout /= host->timeout_clk;
3259 }
58d1246d 3260
e89d456f 3261 mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
781e989c 3262 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
e89d456f
AW		 3263
3264 if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
3265 host->flags |= SDHCI_AUTO_CMD12;
5fe23c7f 3266
8edf6371 3267 /* Auto-CMD23 stuff only works in ADMA or PIO. */
4f3d3e9b 3268 if ((host->version >= SDHCI_SPEC_300) &&
8edf6371 3269 ((host->flags & SDHCI_USE_ADMA) ||
3bfa6f03
SB		 3270 !(host->flags & SDHCI_USE_SDMA)) &&
3271 !(host->quirks2 & SDHCI_QUIRK2_ACMD23_BROKEN)) {
8edf6371
AW		 3272 host->flags |= SDHCI_AUTO_CMD23;
3273 DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));
3274 } else {
3275 DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc));
3276 }
3277
15ec4461
PR		 3278 /*
3279 * A controller may support 8-bit width, but the board itself
3280 * might not have the pins brought out. Boards that support
3281 * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in
3282 * their platform code before calling sdhci_add_host(), and we
3283 * won't assume 8-bit width for hosts without that CAP.
3284 */
5fe23c7f 3285 if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
15ec4461 3286 mmc->caps |= MMC_CAP_4_BIT_DATA;
d129bceb 3287
63ef5d8c
JH		 3288 if (host->quirks2 & SDHCI_QUIRK2_HOST_NO_CMD23)
3289 mmc->caps &= ~MMC_CAP_CMD23;
3290
28da3589 3291 if (host->caps & SDHCI_CAN_DO_HISPD)
a29e7e18 3292 mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
cd9277c0 3293
176d1ed4 3294 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
860951c5 3295 mmc_card_is_removable(mmc) &&
287980e4 3296 mmc_gpio_get_cd(host->mmc) < 0)
68d1fb7e
AV		 3297 mmc->caps |= MMC_CAP_NEEDS_POLL;
3298
6231f3de 3299 /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */
3a48edc4
TK		 3300 if (!IS_ERR(mmc->supply.vqmmc)) {
3301 ret = regulator_enable(mmc->supply.vqmmc);
3302 if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000,
3303 1950000))
28da3589
AH		 3304 host->caps1 &= ~(SDHCI_SUPPORT_SDR104 |
3305 SDHCI_SUPPORT_SDR50 |
3306 SDHCI_SUPPORT_DDR50);
a3361aba
CB		 3307 if (ret) {
3308 pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
3309 mmc_hostname(mmc), ret);
4bb74313 3310 mmc->supply.vqmmc = ERR_PTR(-EINVAL);
a3361aba 3311 }
8363c374 3312 }
6231f3de 3313
28da3589
AH		 3314 if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) {
3315 host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
3316 SDHCI_SUPPORT_DDR50);
3317 }
6a66180a 3318
4188bba0 3319 /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
28da3589
AH		 3320 if (host->caps1 & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
3321 SDHCI_SUPPORT_DDR50))
f2119df6
AN		 3322 mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
3323
3324 /* SDR104 supports also implies SDR50 support */
28da3589 3325 if (host->caps1 & SDHCI_SUPPORT_SDR104) {
f2119df6 3326 mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
156e14b1
GC		 3327 /* SD3.0: SDR104 is supported so (for eMMC) the caps2
3328 * field can be promoted to support HS200.
3329 */
549c0b18 3330 if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200))
13868bf2 3331 mmc->caps2 |= MMC_CAP2_HS200;
28da3589 3332 } else if (host->caps1 & SDHCI_SUPPORT_SDR50) {
f2119df6 3333 mmc->caps |= MMC_CAP_UHS_SDR50;
28da3589 3334 }
f2119df6 3335
e9fb05d5 3336 if (host->quirks2 & SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 &&
28da3589 3337 (host->caps1 & SDHCI_SUPPORT_HS400))
e9fb05d5
AH		 3338 mmc->caps2 |= MMC_CAP2_HS400;
3339
549c0b18
AH		 3340 if ((mmc->caps2 & MMC_CAP2_HSX00_1_2V) &&
3341 (IS_ERR(mmc->supply.vqmmc) ||
3342 !regulator_is_supported_voltage(mmc->supply.vqmmc, 1100000,
3343 1300000)))
3344 mmc->caps2 &= ~MMC_CAP2_HSX00_1_2V;
3345
28da3589
AH		 3346 if ((host->caps1 & SDHCI_SUPPORT_DDR50) &&
3347 !(host->quirks2 & SDHCI_QUIRK2_BROKEN_DDR50))
f2119df6
AN		 3348 mmc->caps |= MMC_CAP_UHS_DDR50;
3349
069c9f14 3350 /* Does the host need tuning for SDR50? */
28da3589 3351 if (host->caps1 & SDHCI_USE_SDR50_TUNING)
b513ea25
AN		 3352 host->flags |= SDHCI_SDR50_NEEDS_TUNING;
3353
d6d50a15 3354 /* Driver Type(s) (A, C, D) supported by the host */
28da3589 3355 if (host->caps1 & SDHCI_DRIVER_TYPE_A)
d6d50a15 3356 mmc->caps |= MMC_CAP_DRIVER_TYPE_A;
28da3589 3357 if (host->caps1 & SDHCI_DRIVER_TYPE_C)
d6d50a15 3358 mmc->caps |= MMC_CAP_DRIVER_TYPE_C;
28da3589 3359 if (host->caps1 & SDHCI_DRIVER_TYPE_D)
d6d50a15
AN		 3360 mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
3361
cf2b5eea 3362 /* Initial value for re-tuning timer count */
28da3589
AH		 3363 host->tuning_count = (host->caps1 & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
3364 SDHCI_RETUNING_TIMER_COUNT_SHIFT;
cf2b5eea
AN		 3365
3366 /*
3367 * In case Re-tuning Timer is not disabled, the actual value of
3368 * re-tuning timer will be 2 ^ (n - 1).
3369 */
3370 if (host->tuning_count)
3371 host->tuning_count = 1 << (host->tuning_count - 1);
3372
3373 /* Re-tuning mode supported by the Host Controller */
28da3589 3374 host->tuning_mode = (host->caps1 & SDHCI_RETUNING_MODE_MASK) >>
cf2b5eea
AN		 3375 SDHCI_RETUNING_MODE_SHIFT;
3376
8f230f45 3377 ocr_avail = 0;
bad37e1a 3378
f2119df6
AN		 3379 /*
3380 * According to SD Host Controller spec v3.00, if the Host System
3381 * can afford more than 150mA, Host Driver should set XPC to 1. Also
3382 * the value is meaningful only if Voltage Support in the Capabilities
3383 * register is set. The actual current value is 4 times the register
3384 * value.
3385 */
3386 max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
3a48edc4 3387 if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) {
ae906037 3388 int curr = regulator_get_current_limit(mmc->supply.vmmc);
bad37e1a
PR		 3389 if (curr > 0) {
3390
3391 /* convert to SDHCI_MAX_CURRENT format */
3392 curr = curr/1000; /* convert to mA */
3393 curr = curr/SDHCI_MAX_CURRENT_MULTIPLIER;
3394
3395 curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
3396 max_current_caps =
3397 (curr << SDHCI_MAX_CURRENT_330_SHIFT) |
3398 (curr << SDHCI_MAX_CURRENT_300_SHIFT) |
3399 (curr << SDHCI_MAX_CURRENT_180_SHIFT);
3400 }
3401 }
f2119df6 3402
28da3589 3403 if (host->caps & SDHCI_CAN_VDD_330) {
8f230f45 3404 ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34;
f2119df6 3405
55c4665e 3406 mmc->max_current_330 = ((max_current_caps &
f2119df6
AN		 3407 SDHCI_MAX_CURRENT_330_MASK) >>
3408 SDHCI_MAX_CURRENT_330_SHIFT) *
3409 SDHCI_MAX_CURRENT_MULTIPLIER;
f2119df6 3410 }
28da3589 3411 if (host->caps & SDHCI_CAN_VDD_300) {
8f230f45 3412 ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31;
f2119df6 3413
55c4665e 3414 mmc->max_current_300 = ((max_current_caps &
f2119df6
AN		 3415 SDHCI_MAX_CURRENT_300_MASK) >>
3416 SDHCI_MAX_CURRENT_300_SHIFT) *
3417 SDHCI_MAX_CURRENT_MULTIPLIER;
f2119df6 3418 }
28da3589 3419 if (host->caps & SDHCI_CAN_VDD_180) {
8f230f45
TI		 3420 ocr_avail |= MMC_VDD_165_195;
3421
55c4665e 3422 mmc->max_current_180 = ((max_current_caps &
f2119df6
AN		 3423 SDHCI_MAX_CURRENT_180_MASK) >>
3424 SDHCI_MAX_CURRENT_180_SHIFT) *
3425 SDHCI_MAX_CURRENT_MULTIPLIER;
f2119df6
AN		 3426 }
3427
5fd26c7e
UH		 3428 /* If OCR set by host, use it instead. */
3429 if (host->ocr_mask)
3430 ocr_avail = host->ocr_mask;
3431
3432 /* If OCR set by external regulators, give it highest prio. */
3a48edc4 3433 if (mmc->ocr_avail)
52221610 3434 ocr_avail = mmc->ocr_avail;
3a48edc4 3435
8f230f45
TI		 3436 mmc->ocr_avail = ocr_avail;
3437 mmc->ocr_avail_sdio = ocr_avail;
3438 if (host->ocr_avail_sdio)
3439 mmc->ocr_avail_sdio &= host->ocr_avail_sdio;
3440 mmc->ocr_avail_sd = ocr_avail;
3441 if (host->ocr_avail_sd)
3442 mmc->ocr_avail_sd &= host->ocr_avail_sd;
3443 else /* normal SD controllers don't support 1.8V */
3444 mmc->ocr_avail_sd &= ~MMC_VDD_165_195;
3445 mmc->ocr_avail_mmc = ocr_avail;
3446 if (host->ocr_avail_mmc)
3447 mmc->ocr_avail_mmc &= host->ocr_avail_mmc;
146ad66e
PO		 3448
3449 if (mmc->ocr_avail == 0) {
2e4456f0
MV		 3450 pr_err("%s: Hardware doesn't report any support voltages.\n",
3451 mmc_hostname(mmc));
eb5c20de
AH		 3452 ret = -ENODEV;
3453 goto unreg;
146ad66e
PO		 3454 }
3455
8cb851a4
AH		 3456 if ((mmc->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
3457 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
3458 MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR)) ||
3459 (mmc->caps2 & (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V)))
3460 host->flags |= SDHCI_SIGNALING_180;
3461
3462 if (mmc->caps2 & MMC_CAP2_HSX00_1_2V)
3463 host->flags |= SDHCI_SIGNALING_120;
3464
d129bceb
PO		 3465 spin_lock_init(&host->lock);
3466
3467 /*
2134a922
PO		 3468 * Maximum number of segments. Depends on if the hardware
3469 * can do scatter/gather or not.
d129bceb 3470 */
2134a922 3471 if (host->flags & SDHCI_USE_ADMA)
4fb213f8 3472 mmc->max_segs = SDHCI_MAX_SEGS;
a13abc7b 3473 else if (host->flags & SDHCI_USE_SDMA)
a36274e0 3474 mmc->max_segs = 1;
2134a922 3475 else /* PIO */
4fb213f8 3476 mmc->max_segs = SDHCI_MAX_SEGS;
d129bceb
PO		 3477
3478 /*
ac00531d
AH		 3479 * Maximum number of sectors in one transfer. Limited by SDMA boundary
3480 * size (512KiB). Note some tuning modes impose a 4MiB limit, but this
3481 * is less anyway.
d129bceb 3482 */
55db890a 3483 mmc->max_req_size = 524288;
d129bceb
PO		 3484
3485 /*
3486 * Maximum segment size. Could be one segment with the maximum number
2134a922
PO		 3487 * of bytes. When doing hardware scatter/gather, each entry cannot
3488 * be larger than 64 KiB though.
d129bceb 3489 */
30652aa3
OJ		 3490 if (host->flags & SDHCI_USE_ADMA) {
3491 if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC)
3492 mmc->max_seg_size = 65535;
3493 else
3494 mmc->max_seg_size = 65536;
3495 } else {
2134a922 3496 mmc->max_seg_size = mmc->max_req_size;
30652aa3 3497 }
d129bceb 3498
fe4a3c7a
PO		 3499 /*
3500 * Maximum block size. This varies from controller to controller and
3501 * is specified in the capabilities register.
3502 */
0633f654
AV		 3503 if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
3504 mmc->max_blk_size = 2;
3505 } else {
28da3589 3506 mmc->max_blk_size = (host->caps & SDHCI_MAX_BLOCK_MASK) >>
0633f654
AV		 3507 SDHCI_MAX_BLOCK_SHIFT;
3508 if (mmc->max_blk_size >= 3) {
6606110d
JP		 3509 pr_warn("%s: Invalid maximum block size, assuming 512 bytes\n",
3510 mmc_hostname(mmc));
0633f654
AV		 3511 mmc->max_blk_size = 0;
3512 }
3513 }
3514
3515 mmc->max_blk_size = 512 << mmc->max_blk_size;
fe4a3c7a 3516
55db890a
PO		 3517 /*
3518 * Maximum block count.
3519 */
1388eefd 3520 mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
55db890a 3521
52f5336d
AH		 3522 return 0;
3523
3524unreg:
3525 if (!IS_ERR(mmc->supply.vqmmc))
3526 regulator_disable(mmc->supply.vqmmc);
3527undma:
3528 if (host->align_buffer)
3529 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
3530 host->adma_table_sz, host->align_buffer,
3531 host->align_addr);
3532 host->adma_table = NULL;
3533 host->align_buffer = NULL;
3534
3535 return ret;
3536}
3537EXPORT_SYMBOL_GPL(sdhci_setup_host);
3538
3539int __sdhci_add_host(struct sdhci_host *host)
3540{
3541 struct mmc_host *mmc = host->mmc;
3542 int ret;
3543
d129bceb
PO		 3544 /*
3545 * Init tasklets.
3546 */
d129bceb
PO		 3547 tasklet_init(&host->finish_tasklet,
3548 sdhci_tasklet_finish, (unsigned long)host);
3549
e4cad1b5 3550 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
d7422fb4
AH		 3551 setup_timer(&host->data_timer, sdhci_timeout_data_timer,
3552 (unsigned long)host);
d129bceb 3553
250fb7b4 3554 init_waitqueue_head(&host->buf_ready_int);
b513ea25 3555
2af502ca
SG		 3556 sdhci_init(host, 0);
3557
781e989c
RK		 3558 ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq,
3559 IRQF_SHARED, mmc_hostname(mmc), host);
0fc81ee3
MB		 3560 if (ret) {
3561 pr_err("%s: Failed to request IRQ %d: %d\n",
3562 mmc_hostname(mmc), host->irq, ret);
8ef1a143 3563 goto untasklet;
0fc81ee3 3564 }
d129bceb 3565
d129bceb
PO		 3566#ifdef CONFIG_MMC_DEBUG
3567 sdhci_dumpregs(host);
3568#endif
3569
061d17a6 3570 ret = sdhci_led_register(host);
0fc81ee3
MB		 3571 if (ret) {
3572 pr_err("%s: Failed to register LED device: %d\n",
3573 mmc_hostname(mmc), ret);
eb5c20de 3574 goto unirq;
0fc81ee3 3575 }
2f730fec 3576
5f25a66f
PO		 3577 mmiowb();
3578
eb5c20de
AH		 3579 ret = mmc_add_host(mmc);
3580 if (ret)
3581 goto unled;
d129bceb 3582
a3c76eb9 3583 pr_info("%s: SDHCI controller on %s [%s] using %s\n",
d1b26863 3584 mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
e57a5f61
AH		 3585 (host->flags & SDHCI_USE_ADMA) ?
3586 (host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" :
a13abc7b 3587 (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
d129bceb 3588
7260cf5e
AV		 3589 sdhci_enable_card_detection(host);
3590
d129bceb
PO		 3591 return 0;
3592
eb5c20de 3593unled:
061d17a6 3594 sdhci_led_unregister(host);
eb5c20de 3595unirq:
03231f9b 3596 sdhci_do_reset(host, SDHCI_RESET_ALL);
b537f94c
RK		 3597 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
3598 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
2f730fec 3599 free_irq(host->irq, host);
8ef1a143 3600untasklet:
d129bceb 3601 tasklet_kill(&host->finish_tasklet);
52f5336d 3602
eb5c20de
AH		 3603 if (!IS_ERR(mmc->supply.vqmmc))
3604 regulator_disable(mmc->supply.vqmmc);
52f5336d 3605
eb5c20de
AH		 3606 if (host->align_buffer)
3607 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
3608 host->adma_table_sz, host->align_buffer,
3609 host->align_addr);
3610 host->adma_table = NULL;
3611 host->align_buffer = NULL;
d129bceb
PO		 3612
3613 return ret;
3614}
52f5336d
AH		 3615EXPORT_SYMBOL_GPL(__sdhci_add_host);
3616
3617int sdhci_add_host(struct sdhci_host *host)
3618{
3619 int ret;
3620
3621 ret = sdhci_setup_host(host);
3622 if (ret)
3623 return ret;
d129bceb 3624
52f5336d
AH		 3625 return __sdhci_add_host(host);
3626}
b8c86fc5 3627EXPORT_SYMBOL_GPL(sdhci_add_host);
d129bceb 3628
1e72859e 3629void sdhci_remove_host(struct sdhci_host *host, int dead)
b8c86fc5 3630{
3a48edc4 3631 struct mmc_host *mmc = host->mmc;
1e72859e
PO		 3632 unsigned long flags;
3633
3634 if (dead) {
3635 spin_lock_irqsave(&host->lock, flags);
3636
3637 host->flags |= SDHCI_DEVICE_DEAD;
3638
5d0d11c5 3639 if (sdhci_has_requests(host)) {
a3c76eb9 3640 pr_err("%s: Controller removed during "
4e743f1f 3641 " transfer!\n", mmc_hostname(mmc));
5d0d11c5 3642 sdhci_error_out_mrqs(host, -ENOMEDIUM);
1e72859e
PO		 3643 }
3644
3645 spin_unlock_irqrestore(&host->lock, flags);
3646 }
3647
7260cf5e
AV		 3648 sdhci_disable_card_detection(host);
3649
4e743f1f 3650 mmc_remove_host(mmc);
d129bceb 3651
061d17a6 3652 sdhci_led_unregister(host);
2f730fec 3653
1e72859e 3654 if (!dead)
03231f9b 3655 sdhci_do_reset(host, SDHCI_RESET_ALL);
d129bceb 3656
b537f94c
RK		 3657 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
3658 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
d129bceb
PO		 3659 free_irq(host->irq, host);
3660
3661 del_timer_sync(&host->timer);
d7422fb4 3662 del_timer_sync(&host->data_timer);
d129bceb 3663
d129bceb 3664 tasklet_kill(&host->finish_tasklet);
2134a922 3665
3a48edc4
TK		 3666 if (!IS_ERR(mmc->supply.vqmmc))
3667 regulator_disable(mmc->supply.vqmmc);
6231f3de 3668
edd63fcc 3669 if (host->align_buffer)
e66e61cb
RK		 3670 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
3671 host->adma_table_sz, host->align_buffer,
3672 host->align_addr);
2134a922 3673
4efaa6fb 3674 host->adma_table = NULL;
2134a922 3675 host->align_buffer = NULL;
d129bceb
PO		 3676}
3677
b8c86fc5 3678EXPORT_SYMBOL_GPL(sdhci_remove_host);
d129bceb 3679
b8c86fc5 3680void sdhci_free_host(struct sdhci_host *host)
d129bceb 3681{
b8c86fc5 3682 mmc_free_host(host->mmc);
d129bceb
PO		 3683}
3684
b8c86fc5 3685EXPORT_SYMBOL_GPL(sdhci_free_host);
d129bceb
PO		 3686
3687/*****************************************************************************\
3688 * *
3689 * Driver init/exit *
3690 * *
3691\*****************************************************************************/
3692
3693static int __init sdhci_drv_init(void)
3694{
a3c76eb9 3695 pr_info(DRIVER_NAME
52fbf9c9 3696 ": Secure Digital Host Controller Interface driver\n");
a3c76eb9 3697 pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
d129bceb 3698
b8c86fc5 3699 return 0;
d129bceb
PO		 3700}
3701
3702static void __exit sdhci_drv_exit(void)
3703{
d129bceb
PO		 3704}
3705
3706module_init(sdhci_drv_init);
3707module_exit(sdhci_drv_exit);
3708
df673b22 3709module_param(debug_quirks, uint, 0444);
66fd8ad5 3710module_param(debug_quirks2, uint, 0444);
67435274 3711
32710e8f 3712MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
b8c86fc5 3713MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
d129bceb 3714MODULE_LICENSE("GPL");
67435274 3715
df673b22 3716MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
66fd8ad5 3717MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks.");
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