Commit | Line | Data |
---|---|---|
d129bceb | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver |
d129bceb | 3 | * |
b69c9058 | 4 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
d129bceb PO |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
643f720c PO |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or (at | |
9 | * your option) any later version. | |
84c46a53 PO |
10 | * |
11 | * Thanks to the following companies for their support: | |
12 | * | |
13 | * - JMicron (hardware and technical support) | |
d129bceb PO |
14 | */ |
15 | ||
d129bceb PO |
16 | #include <linux/delay.h> |
17 | #include <linux/highmem.h> | |
b8c86fc5 | 18 | #include <linux/io.h> |
88b47679 | 19 | #include <linux/module.h> |
d129bceb | 20 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
11763609 | 22 | #include <linux/scatterlist.h> |
9bea3c85 | 23 | #include <linux/regulator/consumer.h> |
66fd8ad5 | 24 | #include <linux/pm_runtime.h> |
d129bceb | 25 | |
2f730fec PO |
26 | #include <linux/leds.h> |
27 | ||
22113efd | 28 | #include <linux/mmc/mmc.h> |
d129bceb | 29 | #include <linux/mmc/host.h> |
473b095a | 30 | #include <linux/mmc/card.h> |
bec9d4e5 | 31 | #include <linux/mmc/slot-gpio.h> |
d129bceb | 32 | |
d129bceb PO |
33 | #include "sdhci.h" |
34 | ||
35 | #define DRIVER_NAME "sdhci" | |
d129bceb | 36 | |
d129bceb | 37 | #define DBG(f, x...) \ |
c6563178 | 38 | pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x) |
d129bceb | 39 | |
f9134319 PO |
40 | #if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ |
41 | defined(CONFIG_MMC_SDHCI_MODULE)) | |
42 | #define SDHCI_USE_LEDS_CLASS | |
43 | #endif | |
44 | ||
b513ea25 AN |
45 | #define MAX_TUNING_LOOP 40 |
46 | ||
df673b22 | 47 | static unsigned int debug_quirks = 0; |
66fd8ad5 | 48 | static unsigned int debug_quirks2; |
67435274 | 49 | |
d129bceb PO |
50 | static void sdhci_finish_data(struct sdhci_host *); |
51 | ||
d129bceb | 52 | static void sdhci_finish_command(struct sdhci_host *); |
069c9f14 | 53 | static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode); |
cf2b5eea | 54 | static void sdhci_tuning_timer(unsigned long data); |
52983382 | 55 | static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable); |
348487cb HC |
56 | static int sdhci_pre_dma_transfer(struct sdhci_host *host, |
57 | struct mmc_data *data, | |
58 | struct sdhci_host_next *next); | |
d129bceb | 59 | |
162d6f98 | 60 | #ifdef CONFIG_PM |
66fd8ad5 AH |
61 | static int sdhci_runtime_pm_get(struct sdhci_host *host); |
62 | static int sdhci_runtime_pm_put(struct sdhci_host *host); | |
f0710a55 AH |
63 | static void sdhci_runtime_pm_bus_on(struct sdhci_host *host); |
64 | static void sdhci_runtime_pm_bus_off(struct sdhci_host *host); | |
66fd8ad5 AH |
65 | #else |
66 | static inline int sdhci_runtime_pm_get(struct sdhci_host *host) | |
67 | { | |
68 | return 0; | |
69 | } | |
70 | static inline int sdhci_runtime_pm_put(struct sdhci_host *host) | |
71 | { | |
72 | return 0; | |
73 | } | |
f0710a55 AH |
74 | static void sdhci_runtime_pm_bus_on(struct sdhci_host *host) |
75 | { | |
76 | } | |
77 | static void sdhci_runtime_pm_bus_off(struct sdhci_host *host) | |
78 | { | |
79 | } | |
66fd8ad5 AH |
80 | #endif |
81 | ||
d129bceb PO |
82 | static void sdhci_dumpregs(struct sdhci_host *host) |
83 | { | |
a3c76eb9 | 84 | pr_debug(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n", |
412ab659 | 85 | mmc_hostname(host->mmc)); |
d129bceb | 86 | |
a3c76eb9 | 87 | pr_debug(DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n", |
4e4141a5 AV |
88 | sdhci_readl(host, SDHCI_DMA_ADDRESS), |
89 | sdhci_readw(host, SDHCI_HOST_VERSION)); | |
a3c76eb9 | 90 | pr_debug(DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n", |
4e4141a5 AV |
91 | sdhci_readw(host, SDHCI_BLOCK_SIZE), |
92 | sdhci_readw(host, SDHCI_BLOCK_COUNT)); | |
a3c76eb9 | 93 | pr_debug(DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n", |
4e4141a5 AV |
94 | sdhci_readl(host, SDHCI_ARGUMENT), |
95 | sdhci_readw(host, SDHCI_TRANSFER_MODE)); | |
a3c76eb9 | 96 | pr_debug(DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n", |
4e4141a5 AV |
97 | sdhci_readl(host, SDHCI_PRESENT_STATE), |
98 | sdhci_readb(host, SDHCI_HOST_CONTROL)); | |
a3c76eb9 | 99 | pr_debug(DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n", |
4e4141a5 AV |
100 | sdhci_readb(host, SDHCI_POWER_CONTROL), |
101 | sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL)); | |
a3c76eb9 | 102 | pr_debug(DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", |
4e4141a5 AV |
103 | sdhci_readb(host, SDHCI_WAKE_UP_CONTROL), |
104 | sdhci_readw(host, SDHCI_CLOCK_CONTROL)); | |
a3c76eb9 | 105 | pr_debug(DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", |
4e4141a5 AV |
106 | sdhci_readb(host, SDHCI_TIMEOUT_CONTROL), |
107 | sdhci_readl(host, SDHCI_INT_STATUS)); | |
a3c76eb9 | 108 | pr_debug(DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n", |
4e4141a5 AV |
109 | sdhci_readl(host, SDHCI_INT_ENABLE), |
110 | sdhci_readl(host, SDHCI_SIGNAL_ENABLE)); | |
a3c76eb9 | 111 | pr_debug(DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n", |
4e4141a5 AV |
112 | sdhci_readw(host, SDHCI_ACMD12_ERR), |
113 | sdhci_readw(host, SDHCI_SLOT_INT_STATUS)); | |
a3c76eb9 | 114 | pr_debug(DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n", |
4e4141a5 | 115 | sdhci_readl(host, SDHCI_CAPABILITIES), |
e8120ad1 | 116 | sdhci_readl(host, SDHCI_CAPABILITIES_1)); |
a3c76eb9 | 117 | pr_debug(DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n", |
e8120ad1 | 118 | sdhci_readw(host, SDHCI_COMMAND), |
4e4141a5 | 119 | sdhci_readl(host, SDHCI_MAX_CURRENT)); |
a3c76eb9 | 120 | pr_debug(DRIVER_NAME ": Host ctl2: 0x%08x\n", |
f2119df6 | 121 | sdhci_readw(host, SDHCI_HOST_CONTROL2)); |
d129bceb | 122 | |
e57a5f61 AH |
123 | if (host->flags & SDHCI_USE_ADMA) { |
124 | if (host->flags & SDHCI_USE_64_BIT_DMA) | |
125 | pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x%08x\n", | |
126 | readl(host->ioaddr + SDHCI_ADMA_ERROR), | |
127 | readl(host->ioaddr + SDHCI_ADMA_ADDRESS_HI), | |
128 | readl(host->ioaddr + SDHCI_ADMA_ADDRESS)); | |
129 | else | |
130 | pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n", | |
131 | readl(host->ioaddr + SDHCI_ADMA_ERROR), | |
132 | readl(host->ioaddr + SDHCI_ADMA_ADDRESS)); | |
133 | } | |
be3f4ae0 | 134 | |
a3c76eb9 | 135 | pr_debug(DRIVER_NAME ": ===========================================\n"); |
d129bceb PO |
136 | } |
137 | ||
138 | /*****************************************************************************\ | |
139 | * * | |
140 | * Low level functions * | |
141 | * * | |
142 | \*****************************************************************************/ | |
143 | ||
7260cf5e AV |
144 | static void sdhci_set_card_detection(struct sdhci_host *host, bool enable) |
145 | { | |
5b4f1f6c | 146 | u32 present; |
7260cf5e | 147 | |
c79396c1 | 148 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || |
87b87a3f | 149 | (host->mmc->caps & MMC_CAP_NONREMOVABLE)) |
66fd8ad5 AH |
150 | return; |
151 | ||
5b4f1f6c RK |
152 | if (enable) { |
153 | present = sdhci_readl(host, SDHCI_PRESENT_STATE) & | |
154 | SDHCI_CARD_PRESENT; | |
d25928d1 | 155 | |
5b4f1f6c RK |
156 | host->ier |= present ? SDHCI_INT_CARD_REMOVE : |
157 | SDHCI_INT_CARD_INSERT; | |
158 | } else { | |
159 | host->ier &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT); | |
160 | } | |
b537f94c RK |
161 | |
162 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); | |
163 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
7260cf5e AV |
164 | } |
165 | ||
166 | static void sdhci_enable_card_detection(struct sdhci_host *host) | |
167 | { | |
168 | sdhci_set_card_detection(host, true); | |
169 | } | |
170 | ||
171 | static void sdhci_disable_card_detection(struct sdhci_host *host) | |
172 | { | |
173 | sdhci_set_card_detection(host, false); | |
174 | } | |
175 | ||
03231f9b | 176 | void sdhci_reset(struct sdhci_host *host, u8 mask) |
d129bceb | 177 | { |
e16514d8 | 178 | unsigned long timeout; |
393c1a34 | 179 | |
4e4141a5 | 180 | sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); |
d129bceb | 181 | |
f0710a55 | 182 | if (mask & SDHCI_RESET_ALL) { |
d129bceb | 183 | host->clock = 0; |
f0710a55 AH |
184 | /* Reset-all turns off SD Bus Power */ |
185 | if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) | |
186 | sdhci_runtime_pm_bus_off(host); | |
187 | } | |
d129bceb | 188 | |
e16514d8 PO |
189 | /* Wait max 100 ms */ |
190 | timeout = 100; | |
191 | ||
192 | /* hw clears the bit when it's done */ | |
4e4141a5 | 193 | while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) { |
e16514d8 | 194 | if (timeout == 0) { |
a3c76eb9 | 195 | pr_err("%s: Reset 0x%x never completed.\n", |
e16514d8 PO |
196 | mmc_hostname(host->mmc), (int)mask); |
197 | sdhci_dumpregs(host); | |
198 | return; | |
199 | } | |
200 | timeout--; | |
201 | mdelay(1); | |
d129bceb | 202 | } |
03231f9b RK |
203 | } |
204 | EXPORT_SYMBOL_GPL(sdhci_reset); | |
205 | ||
206 | static void sdhci_do_reset(struct sdhci_host *host, u8 mask) | |
207 | { | |
208 | if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { | |
209 | if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & | |
210 | SDHCI_CARD_PRESENT)) | |
211 | return; | |
212 | } | |
063a9dbb | 213 | |
03231f9b | 214 | host->ops->reset(host, mask); |
393c1a34 | 215 | |
da91a8f9 RK |
216 | if (mask & SDHCI_RESET_ALL) { |
217 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { | |
218 | if (host->ops->enable_dma) | |
219 | host->ops->enable_dma(host); | |
220 | } | |
221 | ||
222 | /* Resetting the controller clears many */ | |
223 | host->preset_enabled = false; | |
3abc1e80 | 224 | } |
d129bceb PO |
225 | } |
226 | ||
2f4cbb3d NP |
227 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); |
228 | ||
229 | static void sdhci_init(struct sdhci_host *host, int soft) | |
d129bceb | 230 | { |
2f4cbb3d | 231 | if (soft) |
03231f9b | 232 | sdhci_do_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA); |
2f4cbb3d | 233 | else |
03231f9b | 234 | sdhci_do_reset(host, SDHCI_RESET_ALL); |
d129bceb | 235 | |
b537f94c RK |
236 | host->ier = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | |
237 | SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | | |
238 | SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC | | |
239 | SDHCI_INT_TIMEOUT | SDHCI_INT_DATA_END | | |
240 | SDHCI_INT_RESPONSE; | |
241 | ||
242 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); | |
243 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
2f4cbb3d NP |
244 | |
245 | if (soft) { | |
246 | /* force clock reconfiguration */ | |
247 | host->clock = 0; | |
248 | sdhci_set_ios(host->mmc, &host->mmc->ios); | |
249 | } | |
7260cf5e | 250 | } |
d129bceb | 251 | |
7260cf5e AV |
252 | static void sdhci_reinit(struct sdhci_host *host) |
253 | { | |
2f4cbb3d | 254 | sdhci_init(host, 0); |
b67c6b41 AL |
255 | /* |
256 | * Retuning stuffs are affected by different cards inserted and only | |
257 | * applicable to UHS-I cards. So reset these fields to their initial | |
258 | * value when card is removed. | |
259 | */ | |
973905fe AL |
260 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
261 | host->flags &= ~SDHCI_USING_RETUNING_TIMER; | |
262 | ||
b67c6b41 AL |
263 | del_timer_sync(&host->tuning_timer); |
264 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
b67c6b41 | 265 | } |
7260cf5e | 266 | sdhci_enable_card_detection(host); |
d129bceb PO |
267 | } |
268 | ||
269 | static void sdhci_activate_led(struct sdhci_host *host) | |
270 | { | |
271 | u8 ctrl; | |
272 | ||
4e4141a5 | 273 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
d129bceb | 274 | ctrl |= SDHCI_CTRL_LED; |
4e4141a5 | 275 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d129bceb PO |
276 | } |
277 | ||
278 | static void sdhci_deactivate_led(struct sdhci_host *host) | |
279 | { | |
280 | u8 ctrl; | |
281 | ||
4e4141a5 | 282 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
d129bceb | 283 | ctrl &= ~SDHCI_CTRL_LED; |
4e4141a5 | 284 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d129bceb PO |
285 | } |
286 | ||
f9134319 | 287 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
288 | static void sdhci_led_control(struct led_classdev *led, |
289 | enum led_brightness brightness) | |
290 | { | |
291 | struct sdhci_host *host = container_of(led, struct sdhci_host, led); | |
292 | unsigned long flags; | |
293 | ||
294 | spin_lock_irqsave(&host->lock, flags); | |
295 | ||
66fd8ad5 AH |
296 | if (host->runtime_suspended) |
297 | goto out; | |
298 | ||
2f730fec PO |
299 | if (brightness == LED_OFF) |
300 | sdhci_deactivate_led(host); | |
301 | else | |
302 | sdhci_activate_led(host); | |
66fd8ad5 | 303 | out: |
2f730fec PO |
304 | spin_unlock_irqrestore(&host->lock, flags); |
305 | } | |
306 | #endif | |
307 | ||
d129bceb PO |
308 | /*****************************************************************************\ |
309 | * * | |
310 | * Core functions * | |
311 | * * | |
312 | \*****************************************************************************/ | |
313 | ||
a406f5a3 | 314 | static void sdhci_read_block_pio(struct sdhci_host *host) |
d129bceb | 315 | { |
7659150c PO |
316 | unsigned long flags; |
317 | size_t blksize, len, chunk; | |
7244b85b | 318 | u32 uninitialized_var(scratch); |
7659150c | 319 | u8 *buf; |
d129bceb | 320 | |
a406f5a3 | 321 | DBG("PIO reading\n"); |
d129bceb | 322 | |
a406f5a3 | 323 | blksize = host->data->blksz; |
7659150c | 324 | chunk = 0; |
d129bceb | 325 | |
7659150c | 326 | local_irq_save(flags); |
d129bceb | 327 | |
a406f5a3 | 328 | while (blksize) { |
7659150c PO |
329 | if (!sg_miter_next(&host->sg_miter)) |
330 | BUG(); | |
d129bceb | 331 | |
7659150c | 332 | len = min(host->sg_miter.length, blksize); |
d129bceb | 333 | |
7659150c PO |
334 | blksize -= len; |
335 | host->sg_miter.consumed = len; | |
14d836e7 | 336 | |
7659150c | 337 | buf = host->sg_miter.addr; |
d129bceb | 338 | |
7659150c PO |
339 | while (len) { |
340 | if (chunk == 0) { | |
4e4141a5 | 341 | scratch = sdhci_readl(host, SDHCI_BUFFER); |
7659150c | 342 | chunk = 4; |
a406f5a3 | 343 | } |
7659150c PO |
344 | |
345 | *buf = scratch & 0xFF; | |
346 | ||
347 | buf++; | |
348 | scratch >>= 8; | |
349 | chunk--; | |
350 | len--; | |
d129bceb | 351 | } |
a406f5a3 | 352 | } |
7659150c PO |
353 | |
354 | sg_miter_stop(&host->sg_miter); | |
355 | ||
356 | local_irq_restore(flags); | |
a406f5a3 | 357 | } |
d129bceb | 358 | |
a406f5a3 PO |
359 | static void sdhci_write_block_pio(struct sdhci_host *host) |
360 | { | |
7659150c PO |
361 | unsigned long flags; |
362 | size_t blksize, len, chunk; | |
363 | u32 scratch; | |
364 | u8 *buf; | |
d129bceb | 365 | |
a406f5a3 PO |
366 | DBG("PIO writing\n"); |
367 | ||
368 | blksize = host->data->blksz; | |
7659150c PO |
369 | chunk = 0; |
370 | scratch = 0; | |
d129bceb | 371 | |
7659150c | 372 | local_irq_save(flags); |
d129bceb | 373 | |
a406f5a3 | 374 | while (blksize) { |
7659150c PO |
375 | if (!sg_miter_next(&host->sg_miter)) |
376 | BUG(); | |
a406f5a3 | 377 | |
7659150c PO |
378 | len = min(host->sg_miter.length, blksize); |
379 | ||
380 | blksize -= len; | |
381 | host->sg_miter.consumed = len; | |
382 | ||
383 | buf = host->sg_miter.addr; | |
d129bceb | 384 | |
7659150c PO |
385 | while (len) { |
386 | scratch |= (u32)*buf << (chunk * 8); | |
387 | ||
388 | buf++; | |
389 | chunk++; | |
390 | len--; | |
391 | ||
392 | if ((chunk == 4) || ((len == 0) && (blksize == 0))) { | |
4e4141a5 | 393 | sdhci_writel(host, scratch, SDHCI_BUFFER); |
7659150c PO |
394 | chunk = 0; |
395 | scratch = 0; | |
d129bceb | 396 | } |
d129bceb PO |
397 | } |
398 | } | |
7659150c PO |
399 | |
400 | sg_miter_stop(&host->sg_miter); | |
401 | ||
402 | local_irq_restore(flags); | |
a406f5a3 PO |
403 | } |
404 | ||
405 | static void sdhci_transfer_pio(struct sdhci_host *host) | |
406 | { | |
407 | u32 mask; | |
408 | ||
409 | BUG_ON(!host->data); | |
410 | ||
7659150c | 411 | if (host->blocks == 0) |
a406f5a3 PO |
412 | return; |
413 | ||
414 | if (host->data->flags & MMC_DATA_READ) | |
415 | mask = SDHCI_DATA_AVAILABLE; | |
416 | else | |
417 | mask = SDHCI_SPACE_AVAILABLE; | |
418 | ||
4a3cba32 PO |
419 | /* |
420 | * Some controllers (JMicron JMB38x) mess up the buffer bits | |
421 | * for transfers < 4 bytes. As long as it is just one block, | |
422 | * we can ignore the bits. | |
423 | */ | |
424 | if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) && | |
425 | (host->data->blocks == 1)) | |
426 | mask = ~0; | |
427 | ||
4e4141a5 | 428 | while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
3e3bf207 AV |
429 | if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY) |
430 | udelay(100); | |
431 | ||
a406f5a3 PO |
432 | if (host->data->flags & MMC_DATA_READ) |
433 | sdhci_read_block_pio(host); | |
434 | else | |
435 | sdhci_write_block_pio(host); | |
d129bceb | 436 | |
7659150c PO |
437 | host->blocks--; |
438 | if (host->blocks == 0) | |
a406f5a3 | 439 | break; |
a406f5a3 | 440 | } |
d129bceb | 441 | |
a406f5a3 | 442 | DBG("PIO transfer complete.\n"); |
d129bceb PO |
443 | } |
444 | ||
2134a922 PO |
445 | static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags) |
446 | { | |
447 | local_irq_save(*flags); | |
482fce99 | 448 | return kmap_atomic(sg_page(sg)) + sg->offset; |
2134a922 PO |
449 | } |
450 | ||
451 | static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) | |
452 | { | |
482fce99 | 453 | kunmap_atomic(buffer); |
2134a922 PO |
454 | local_irq_restore(*flags); |
455 | } | |
456 | ||
e57a5f61 AH |
457 | static void sdhci_adma_write_desc(struct sdhci_host *host, void *desc, |
458 | dma_addr_t addr, int len, unsigned cmd) | |
118cd17d | 459 | { |
e57a5f61 | 460 | struct sdhci_adma2_64_desc *dma_desc = desc; |
118cd17d | 461 | |
e57a5f61 | 462 | /* 32-bit and 64-bit descriptors have these members in same position */ |
0545230f AH |
463 | dma_desc->cmd = cpu_to_le16(cmd); |
464 | dma_desc->len = cpu_to_le16(len); | |
e57a5f61 AH |
465 | dma_desc->addr_lo = cpu_to_le32((u32)addr); |
466 | ||
467 | if (host->flags & SDHCI_USE_64_BIT_DMA) | |
468 | dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32); | |
118cd17d BD |
469 | } |
470 | ||
b5ffa674 AH |
471 | static void sdhci_adma_mark_end(void *desc) |
472 | { | |
e57a5f61 | 473 | struct sdhci_adma2_64_desc *dma_desc = desc; |
b5ffa674 | 474 | |
e57a5f61 | 475 | /* 32-bit and 64-bit descriptors have 'cmd' in same position */ |
0545230f | 476 | dma_desc->cmd |= cpu_to_le16(ADMA2_END); |
b5ffa674 AH |
477 | } |
478 | ||
8f1934ce | 479 | static int sdhci_adma_table_pre(struct sdhci_host *host, |
2134a922 PO |
480 | struct mmc_data *data) |
481 | { | |
482 | int direction; | |
483 | ||
1c3d5f6d AH |
484 | void *desc; |
485 | void *align; | |
2134a922 PO |
486 | dma_addr_t addr; |
487 | dma_addr_t align_addr; | |
488 | int len, offset; | |
489 | ||
490 | struct scatterlist *sg; | |
491 | int i; | |
492 | char *buffer; | |
493 | unsigned long flags; | |
494 | ||
495 | /* | |
496 | * The spec does not specify endianness of descriptor table. | |
497 | * We currently guess that it is LE. | |
498 | */ | |
499 | ||
500 | if (data->flags & MMC_DATA_READ) | |
501 | direction = DMA_FROM_DEVICE; | |
502 | else | |
503 | direction = DMA_TO_DEVICE; | |
504 | ||
2134a922 | 505 | host->align_addr = dma_map_single(mmc_dev(host->mmc), |
76fe379a | 506 | host->align_buffer, host->align_buffer_sz, direction); |
8d8bb39b | 507 | if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr)) |
8f1934ce | 508 | goto fail; |
76fe379a | 509 | BUG_ON(host->align_addr & host->align_mask); |
2134a922 | 510 | |
348487cb HC |
511 | host->sg_count = sdhci_pre_dma_transfer(host, data, NULL); |
512 | if (host->sg_count < 0) | |
8f1934ce | 513 | goto unmap_align; |
2134a922 | 514 | |
4efaa6fb | 515 | desc = host->adma_table; |
2134a922 PO |
516 | align = host->align_buffer; |
517 | ||
518 | align_addr = host->align_addr; | |
519 | ||
520 | for_each_sg(data->sg, sg, host->sg_count, i) { | |
521 | addr = sg_dma_address(sg); | |
522 | len = sg_dma_len(sg); | |
523 | ||
524 | /* | |
525 | * The SDHCI specification states that ADMA | |
526 | * addresses must be 32-bit aligned. If they | |
527 | * aren't, then we use a bounce buffer for | |
528 | * the (up to three) bytes that screw up the | |
529 | * alignment. | |
530 | */ | |
76fe379a AH |
531 | offset = (host->align_sz - (addr & host->align_mask)) & |
532 | host->align_mask; | |
2134a922 PO |
533 | if (offset) { |
534 | if (data->flags & MMC_DATA_WRITE) { | |
535 | buffer = sdhci_kmap_atomic(sg, &flags); | |
536 | memcpy(align, buffer, offset); | |
537 | sdhci_kunmap_atomic(buffer, &flags); | |
538 | } | |
539 | ||
118cd17d | 540 | /* tran, valid */ |
e57a5f61 | 541 | sdhci_adma_write_desc(host, desc, align_addr, offset, |
739d46dc | 542 | ADMA2_TRAN_VALID); |
2134a922 PO |
543 | |
544 | BUG_ON(offset > 65536); | |
545 | ||
76fe379a AH |
546 | align += host->align_sz; |
547 | align_addr += host->align_sz; | |
2134a922 | 548 | |
76fe379a | 549 | desc += host->desc_sz; |
2134a922 PO |
550 | |
551 | addr += offset; | |
552 | len -= offset; | |
553 | } | |
554 | ||
2134a922 PO |
555 | BUG_ON(len > 65536); |
556 | ||
118cd17d | 557 | /* tran, valid */ |
e57a5f61 | 558 | sdhci_adma_write_desc(host, desc, addr, len, ADMA2_TRAN_VALID); |
76fe379a | 559 | desc += host->desc_sz; |
2134a922 PO |
560 | |
561 | /* | |
562 | * If this triggers then we have a calculation bug | |
563 | * somewhere. :/ | |
564 | */ | |
76fe379a | 565 | WARN_ON((desc - host->adma_table) >= host->adma_table_sz); |
2134a922 PO |
566 | } |
567 | ||
70764a90 TA |
568 | if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) { |
569 | /* | |
570 | * Mark the last descriptor as the terminating descriptor | |
571 | */ | |
4efaa6fb | 572 | if (desc != host->adma_table) { |
76fe379a | 573 | desc -= host->desc_sz; |
b5ffa674 | 574 | sdhci_adma_mark_end(desc); |
70764a90 TA |
575 | } |
576 | } else { | |
577 | /* | |
578 | * Add a terminating entry. | |
579 | */ | |
2134a922 | 580 | |
70764a90 | 581 | /* nop, end, valid */ |
e57a5f61 | 582 | sdhci_adma_write_desc(host, desc, 0, 0, ADMA2_NOP_END_VALID); |
70764a90 | 583 | } |
2134a922 PO |
584 | |
585 | /* | |
586 | * Resync align buffer as we might have changed it. | |
587 | */ | |
588 | if (data->flags & MMC_DATA_WRITE) { | |
589 | dma_sync_single_for_device(mmc_dev(host->mmc), | |
76fe379a | 590 | host->align_addr, host->align_buffer_sz, direction); |
2134a922 PO |
591 | } |
592 | ||
8f1934ce PO |
593 | return 0; |
594 | ||
8f1934ce PO |
595 | unmap_align: |
596 | dma_unmap_single(mmc_dev(host->mmc), host->align_addr, | |
76fe379a | 597 | host->align_buffer_sz, direction); |
8f1934ce PO |
598 | fail: |
599 | return -EINVAL; | |
2134a922 PO |
600 | } |
601 | ||
602 | static void sdhci_adma_table_post(struct sdhci_host *host, | |
603 | struct mmc_data *data) | |
604 | { | |
605 | int direction; | |
606 | ||
607 | struct scatterlist *sg; | |
608 | int i, size; | |
1c3d5f6d | 609 | void *align; |
2134a922 PO |
610 | char *buffer; |
611 | unsigned long flags; | |
de0b65a7 | 612 | bool has_unaligned; |
2134a922 PO |
613 | |
614 | if (data->flags & MMC_DATA_READ) | |
615 | direction = DMA_FROM_DEVICE; | |
616 | else | |
617 | direction = DMA_TO_DEVICE; | |
618 | ||
2134a922 | 619 | dma_unmap_single(mmc_dev(host->mmc), host->align_addr, |
76fe379a | 620 | host->align_buffer_sz, direction); |
2134a922 | 621 | |
de0b65a7 RK |
622 | /* Do a quick scan of the SG list for any unaligned mappings */ |
623 | has_unaligned = false; | |
624 | for_each_sg(data->sg, sg, host->sg_count, i) | |
76fe379a | 625 | if (sg_dma_address(sg) & host->align_mask) { |
de0b65a7 RK |
626 | has_unaligned = true; |
627 | break; | |
628 | } | |
629 | ||
630 | if (has_unaligned && data->flags & MMC_DATA_READ) { | |
2134a922 PO |
631 | dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, |
632 | data->sg_len, direction); | |
633 | ||
634 | align = host->align_buffer; | |
635 | ||
636 | for_each_sg(data->sg, sg, host->sg_count, i) { | |
76fe379a AH |
637 | if (sg_dma_address(sg) & host->align_mask) { |
638 | size = host->align_sz - | |
639 | (sg_dma_address(sg) & host->align_mask); | |
2134a922 PO |
640 | |
641 | buffer = sdhci_kmap_atomic(sg, &flags); | |
642 | memcpy(buffer, align, size); | |
643 | sdhci_kunmap_atomic(buffer, &flags); | |
644 | ||
76fe379a | 645 | align += host->align_sz; |
2134a922 PO |
646 | } |
647 | } | |
648 | } | |
649 | ||
348487cb HC |
650 | if (!data->host_cookie) |
651 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
652 | data->sg_len, direction); | |
2134a922 PO |
653 | } |
654 | ||
a3c7778f | 655 | static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd) |
d129bceb | 656 | { |
1c8cde92 | 657 | u8 count; |
a3c7778f | 658 | struct mmc_data *data = cmd->data; |
1c8cde92 | 659 | unsigned target_timeout, current_timeout; |
d129bceb | 660 | |
ee53ab5d PO |
661 | /* |
662 | * If the host controller provides us with an incorrect timeout | |
663 | * value, just skip the check and use 0xE. The hardware may take | |
664 | * longer to time out, but that's much better than having a too-short | |
665 | * timeout value. | |
666 | */ | |
11a2f1b7 | 667 | if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) |
ee53ab5d | 668 | return 0xE; |
e538fbe8 | 669 | |
a3c7778f | 670 | /* Unspecified timeout, assume max */ |
1d4d7744 | 671 | if (!data && !cmd->busy_timeout) |
a3c7778f | 672 | return 0xE; |
d129bceb | 673 | |
a3c7778f AW |
674 | /* timeout in us */ |
675 | if (!data) | |
1d4d7744 | 676 | target_timeout = cmd->busy_timeout * 1000; |
78a2ca27 AS |
677 | else { |
678 | target_timeout = data->timeout_ns / 1000; | |
679 | if (host->clock) | |
680 | target_timeout += data->timeout_clks / host->clock; | |
681 | } | |
81b39802 | 682 | |
1c8cde92 PO |
683 | /* |
684 | * Figure out needed cycles. | |
685 | * We do this in steps in order to fit inside a 32 bit int. | |
686 | * The first step is the minimum timeout, which will have a | |
687 | * minimum resolution of 6 bits: | |
688 | * (1) 2^13*1000 > 2^22, | |
689 | * (2) host->timeout_clk < 2^16 | |
690 | * => | |
691 | * (1) / (2) > 2^6 | |
692 | */ | |
693 | count = 0; | |
694 | current_timeout = (1 << 13) * 1000 / host->timeout_clk; | |
695 | while (current_timeout < target_timeout) { | |
696 | count++; | |
697 | current_timeout <<= 1; | |
698 | if (count >= 0xF) | |
699 | break; | |
700 | } | |
701 | ||
702 | if (count >= 0xF) { | |
09eeff52 CB |
703 | DBG("%s: Too large timeout 0x%x requested for CMD%d!\n", |
704 | mmc_hostname(host->mmc), count, cmd->opcode); | |
1c8cde92 PO |
705 | count = 0xE; |
706 | } | |
707 | ||
ee53ab5d PO |
708 | return count; |
709 | } | |
710 | ||
6aa943ab AV |
711 | static void sdhci_set_transfer_irqs(struct sdhci_host *host) |
712 | { | |
713 | u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL; | |
714 | u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR; | |
715 | ||
716 | if (host->flags & SDHCI_REQ_USE_DMA) | |
b537f94c | 717 | host->ier = (host->ier & ~pio_irqs) | dma_irqs; |
6aa943ab | 718 | else |
b537f94c RK |
719 | host->ier = (host->ier & ~dma_irqs) | pio_irqs; |
720 | ||
721 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); | |
722 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
6aa943ab AV |
723 | } |
724 | ||
b45e668a | 725 | static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) |
ee53ab5d PO |
726 | { |
727 | u8 count; | |
b45e668a AD |
728 | |
729 | if (host->ops->set_timeout) { | |
730 | host->ops->set_timeout(host, cmd); | |
731 | } else { | |
732 | count = sdhci_calc_timeout(host, cmd); | |
733 | sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); | |
734 | } | |
735 | } | |
736 | ||
737 | static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) | |
738 | { | |
2134a922 | 739 | u8 ctrl; |
a3c7778f | 740 | struct mmc_data *data = cmd->data; |
8f1934ce | 741 | int ret; |
ee53ab5d PO |
742 | |
743 | WARN_ON(host->data); | |
744 | ||
b45e668a AD |
745 | if (data || (cmd->flags & MMC_RSP_BUSY)) |
746 | sdhci_set_timeout(host, cmd); | |
a3c7778f AW |
747 | |
748 | if (!data) | |
ee53ab5d PO |
749 | return; |
750 | ||
751 | /* Sanity checks */ | |
752 | BUG_ON(data->blksz * data->blocks > 524288); | |
753 | BUG_ON(data->blksz > host->mmc->max_blk_size); | |
754 | BUG_ON(data->blocks > 65535); | |
755 | ||
756 | host->data = data; | |
757 | host->data_early = 0; | |
f6a03cbf | 758 | host->data->bytes_xfered = 0; |
ee53ab5d | 759 | |
a13abc7b | 760 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) |
c9fddbc4 PO |
761 | host->flags |= SDHCI_REQ_USE_DMA; |
762 | ||
2134a922 PO |
763 | /* |
764 | * FIXME: This doesn't account for merging when mapping the | |
765 | * scatterlist. | |
766 | */ | |
767 | if (host->flags & SDHCI_REQ_USE_DMA) { | |
768 | int broken, i; | |
769 | struct scatterlist *sg; | |
770 | ||
771 | broken = 0; | |
772 | if (host->flags & SDHCI_USE_ADMA) { | |
773 | if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) | |
774 | broken = 1; | |
775 | } else { | |
776 | if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) | |
777 | broken = 1; | |
778 | } | |
779 | ||
780 | if (unlikely(broken)) { | |
781 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
782 | if (sg->length & 0x3) { | |
783 | DBG("Reverting to PIO because of " | |
784 | "transfer size (%d)\n", | |
785 | sg->length); | |
786 | host->flags &= ~SDHCI_REQ_USE_DMA; | |
787 | break; | |
788 | } | |
789 | } | |
790 | } | |
c9fddbc4 PO |
791 | } |
792 | ||
793 | /* | |
794 | * The assumption here being that alignment is the same after | |
795 | * translation to device address space. | |
796 | */ | |
2134a922 PO |
797 | if (host->flags & SDHCI_REQ_USE_DMA) { |
798 | int broken, i; | |
799 | struct scatterlist *sg; | |
800 | ||
801 | broken = 0; | |
802 | if (host->flags & SDHCI_USE_ADMA) { | |
803 | /* | |
804 | * As we use 3 byte chunks to work around | |
805 | * alignment problems, we need to check this | |
806 | * quirk. | |
807 | */ | |
808 | if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) | |
809 | broken = 1; | |
810 | } else { | |
811 | if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) | |
812 | broken = 1; | |
813 | } | |
814 | ||
815 | if (unlikely(broken)) { | |
816 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
817 | if (sg->offset & 0x3) { | |
818 | DBG("Reverting to PIO because of " | |
819 | "bad alignment\n"); | |
820 | host->flags &= ~SDHCI_REQ_USE_DMA; | |
821 | break; | |
822 | } | |
823 | } | |
824 | } | |
825 | } | |
826 | ||
8f1934ce PO |
827 | if (host->flags & SDHCI_REQ_USE_DMA) { |
828 | if (host->flags & SDHCI_USE_ADMA) { | |
829 | ret = sdhci_adma_table_pre(host, data); | |
830 | if (ret) { | |
831 | /* | |
832 | * This only happens when someone fed | |
833 | * us an invalid request. | |
834 | */ | |
835 | WARN_ON(1); | |
ebd6d357 | 836 | host->flags &= ~SDHCI_REQ_USE_DMA; |
8f1934ce | 837 | } else { |
4e4141a5 AV |
838 | sdhci_writel(host, host->adma_addr, |
839 | SDHCI_ADMA_ADDRESS); | |
e57a5f61 AH |
840 | if (host->flags & SDHCI_USE_64_BIT_DMA) |
841 | sdhci_writel(host, | |
842 | (u64)host->adma_addr >> 32, | |
843 | SDHCI_ADMA_ADDRESS_HI); | |
8f1934ce PO |
844 | } |
845 | } else { | |
c8b3e02e | 846 | int sg_cnt; |
8f1934ce | 847 | |
348487cb | 848 | sg_cnt = sdhci_pre_dma_transfer(host, data, NULL); |
c8b3e02e | 849 | if (sg_cnt == 0) { |
8f1934ce PO |
850 | /* |
851 | * This only happens when someone fed | |
852 | * us an invalid request. | |
853 | */ | |
854 | WARN_ON(1); | |
ebd6d357 | 855 | host->flags &= ~SDHCI_REQ_USE_DMA; |
8f1934ce | 856 | } else { |
719a61b4 | 857 | WARN_ON(sg_cnt != 1); |
4e4141a5 AV |
858 | sdhci_writel(host, sg_dma_address(data->sg), |
859 | SDHCI_DMA_ADDRESS); | |
8f1934ce PO |
860 | } |
861 | } | |
862 | } | |
863 | ||
2134a922 PO |
864 | /* |
865 | * Always adjust the DMA selection as some controllers | |
866 | * (e.g. JMicron) can't do PIO properly when the selection | |
867 | * is ADMA. | |
868 | */ | |
869 | if (host->version >= SDHCI_SPEC_200) { | |
4e4141a5 | 870 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
2134a922 PO |
871 | ctrl &= ~SDHCI_CTRL_DMA_MASK; |
872 | if ((host->flags & SDHCI_REQ_USE_DMA) && | |
e57a5f61 AH |
873 | (host->flags & SDHCI_USE_ADMA)) { |
874 | if (host->flags & SDHCI_USE_64_BIT_DMA) | |
875 | ctrl |= SDHCI_CTRL_ADMA64; | |
876 | else | |
877 | ctrl |= SDHCI_CTRL_ADMA32; | |
878 | } else { | |
2134a922 | 879 | ctrl |= SDHCI_CTRL_SDMA; |
e57a5f61 | 880 | } |
4e4141a5 | 881 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
c9fddbc4 PO |
882 | } |
883 | ||
8f1934ce | 884 | if (!(host->flags & SDHCI_REQ_USE_DMA)) { |
da60a91d SAS |
885 | int flags; |
886 | ||
887 | flags = SG_MITER_ATOMIC; | |
888 | if (host->data->flags & MMC_DATA_READ) | |
889 | flags |= SG_MITER_TO_SG; | |
890 | else | |
891 | flags |= SG_MITER_FROM_SG; | |
892 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
7659150c | 893 | host->blocks = data->blocks; |
d129bceb | 894 | } |
c7fa9963 | 895 | |
6aa943ab AV |
896 | sdhci_set_transfer_irqs(host); |
897 | ||
f6a03cbf MV |
898 | /* Set the DMA boundary value and block size */ |
899 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, | |
900 | data->blksz), SDHCI_BLOCK_SIZE); | |
4e4141a5 | 901 | sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT); |
c7fa9963 PO |
902 | } |
903 | ||
904 | static void sdhci_set_transfer_mode(struct sdhci_host *host, | |
e89d456f | 905 | struct mmc_command *cmd) |
c7fa9963 PO |
906 | { |
907 | u16 mode; | |
e89d456f | 908 | struct mmc_data *data = cmd->data; |
c7fa9963 | 909 | |
2b558c13 | 910 | if (data == NULL) { |
9b8ffea6 VW |
911 | if (host->quirks2 & |
912 | SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD) { | |
913 | sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE); | |
914 | } else { | |
2b558c13 | 915 | /* clear Auto CMD settings for no data CMDs */ |
9b8ffea6 VW |
916 | mode = sdhci_readw(host, SDHCI_TRANSFER_MODE); |
917 | sdhci_writew(host, mode & ~(SDHCI_TRNS_AUTO_CMD12 | | |
2b558c13 | 918 | SDHCI_TRNS_AUTO_CMD23), SDHCI_TRANSFER_MODE); |
9b8ffea6 | 919 | } |
c7fa9963 | 920 | return; |
2b558c13 | 921 | } |
c7fa9963 | 922 | |
e538fbe8 PO |
923 | WARN_ON(!host->data); |
924 | ||
c7fa9963 | 925 | mode = SDHCI_TRNS_BLK_CNT_EN; |
e89d456f AW |
926 | if (mmc_op_multi(cmd->opcode) || data->blocks > 1) { |
927 | mode |= SDHCI_TRNS_MULTI; | |
928 | /* | |
929 | * If we are sending CMD23, CMD12 never gets sent | |
930 | * on successful completion (so no Auto-CMD12). | |
931 | */ | |
932 | if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) | |
933 | mode |= SDHCI_TRNS_AUTO_CMD12; | |
8edf6371 AW |
934 | else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) { |
935 | mode |= SDHCI_TRNS_AUTO_CMD23; | |
936 | sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2); | |
937 | } | |
c4512f79 | 938 | } |
8edf6371 | 939 | |
c7fa9963 PO |
940 | if (data->flags & MMC_DATA_READ) |
941 | mode |= SDHCI_TRNS_READ; | |
c9fddbc4 | 942 | if (host->flags & SDHCI_REQ_USE_DMA) |
c7fa9963 PO |
943 | mode |= SDHCI_TRNS_DMA; |
944 | ||
4e4141a5 | 945 | sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); |
d129bceb PO |
946 | } |
947 | ||
948 | static void sdhci_finish_data(struct sdhci_host *host) | |
949 | { | |
950 | struct mmc_data *data; | |
d129bceb PO |
951 | |
952 | BUG_ON(!host->data); | |
953 | ||
954 | data = host->data; | |
955 | host->data = NULL; | |
956 | ||
c9fddbc4 | 957 | if (host->flags & SDHCI_REQ_USE_DMA) { |
2134a922 PO |
958 | if (host->flags & SDHCI_USE_ADMA) |
959 | sdhci_adma_table_post(host, data); | |
960 | else { | |
348487cb HC |
961 | if (!data->host_cookie) |
962 | dma_unmap_sg(mmc_dev(host->mmc), | |
963 | data->sg, data->sg_len, | |
964 | (data->flags & MMC_DATA_READ) ? | |
2134a922 PO |
965 | DMA_FROM_DEVICE : DMA_TO_DEVICE); |
966 | } | |
d129bceb PO |
967 | } |
968 | ||
969 | /* | |
c9b74c5b PO |
970 | * The specification states that the block count register must |
971 | * be updated, but it does not specify at what point in the | |
972 | * data flow. That makes the register entirely useless to read | |
973 | * back so we have to assume that nothing made it to the card | |
974 | * in the event of an error. | |
d129bceb | 975 | */ |
c9b74c5b PO |
976 | if (data->error) |
977 | data->bytes_xfered = 0; | |
d129bceb | 978 | else |
c9b74c5b | 979 | data->bytes_xfered = data->blksz * data->blocks; |
d129bceb | 980 | |
e89d456f AW |
981 | /* |
982 | * Need to send CMD12 if - | |
983 | * a) open-ended multiblock transfer (no CMD23) | |
984 | * b) error in multiblock transfer | |
985 | */ | |
986 | if (data->stop && | |
987 | (data->error || | |
988 | !host->mrq->sbc)) { | |
989 | ||
d129bceb PO |
990 | /* |
991 | * The controller needs a reset of internal state machines | |
992 | * upon error conditions. | |
993 | */ | |
17b0429d | 994 | if (data->error) { |
03231f9b RK |
995 | sdhci_do_reset(host, SDHCI_RESET_CMD); |
996 | sdhci_do_reset(host, SDHCI_RESET_DATA); | |
d129bceb PO |
997 | } |
998 | ||
999 | sdhci_send_command(host, data->stop); | |
1000 | } else | |
1001 | tasklet_schedule(&host->finish_tasklet); | |
1002 | } | |
1003 | ||
c0e55129 | 1004 | void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) |
d129bceb PO |
1005 | { |
1006 | int flags; | |
fd2208d7 | 1007 | u32 mask; |
7cb2c76f | 1008 | unsigned long timeout; |
d129bceb PO |
1009 | |
1010 | WARN_ON(host->cmd); | |
1011 | ||
d129bceb | 1012 | /* Wait max 10 ms */ |
7cb2c76f | 1013 | timeout = 10; |
fd2208d7 PO |
1014 | |
1015 | mask = SDHCI_CMD_INHIBIT; | |
1016 | if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY)) | |
1017 | mask |= SDHCI_DATA_INHIBIT; | |
1018 | ||
1019 | /* We shouldn't wait for data inihibit for stop commands, even | |
1020 | though they might use busy signaling */ | |
1021 | if (host->mrq->data && (cmd == host->mrq->data->stop)) | |
1022 | mask &= ~SDHCI_DATA_INHIBIT; | |
1023 | ||
4e4141a5 | 1024 | while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
7cb2c76f | 1025 | if (timeout == 0) { |
a3c76eb9 | 1026 | pr_err("%s: Controller never released " |
acf1da45 | 1027 | "inhibit bit(s).\n", mmc_hostname(host->mmc)); |
d129bceb | 1028 | sdhci_dumpregs(host); |
17b0429d | 1029 | cmd->error = -EIO; |
d129bceb PO |
1030 | tasklet_schedule(&host->finish_tasklet); |
1031 | return; | |
1032 | } | |
7cb2c76f PO |
1033 | timeout--; |
1034 | mdelay(1); | |
1035 | } | |
d129bceb | 1036 | |
3e1a6892 | 1037 | timeout = jiffies; |
1d4d7744 UH |
1038 | if (!cmd->data && cmd->busy_timeout > 9000) |
1039 | timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ; | |
3e1a6892 AH |
1040 | else |
1041 | timeout += 10 * HZ; | |
1042 | mod_timer(&host->timer, timeout); | |
d129bceb PO |
1043 | |
1044 | host->cmd = cmd; | |
e99783a4 | 1045 | host->busy_handle = 0; |
d129bceb | 1046 | |
a3c7778f | 1047 | sdhci_prepare_data(host, cmd); |
d129bceb | 1048 | |
4e4141a5 | 1049 | sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT); |
d129bceb | 1050 | |
e89d456f | 1051 | sdhci_set_transfer_mode(host, cmd); |
c7fa9963 | 1052 | |
d129bceb | 1053 | if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { |
a3c76eb9 | 1054 | pr_err("%s: Unsupported response type!\n", |
d129bceb | 1055 | mmc_hostname(host->mmc)); |
17b0429d | 1056 | cmd->error = -EINVAL; |
d129bceb PO |
1057 | tasklet_schedule(&host->finish_tasklet); |
1058 | return; | |
1059 | } | |
1060 | ||
1061 | if (!(cmd->flags & MMC_RSP_PRESENT)) | |
1062 | flags = SDHCI_CMD_RESP_NONE; | |
1063 | else if (cmd->flags & MMC_RSP_136) | |
1064 | flags = SDHCI_CMD_RESP_LONG; | |
1065 | else if (cmd->flags & MMC_RSP_BUSY) | |
1066 | flags = SDHCI_CMD_RESP_SHORT_BUSY; | |
1067 | else | |
1068 | flags = SDHCI_CMD_RESP_SHORT; | |
1069 | ||
1070 | if (cmd->flags & MMC_RSP_CRC) | |
1071 | flags |= SDHCI_CMD_CRC; | |
1072 | if (cmd->flags & MMC_RSP_OPCODE) | |
1073 | flags |= SDHCI_CMD_INDEX; | |
b513ea25 AN |
1074 | |
1075 | /* CMD19 is special in that the Data Present Select should be set */ | |
069c9f14 G |
1076 | if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK || |
1077 | cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200) | |
d129bceb PO |
1078 | flags |= SDHCI_CMD_DATA; |
1079 | ||
4e4141a5 | 1080 | sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND); |
d129bceb | 1081 | } |
c0e55129 | 1082 | EXPORT_SYMBOL_GPL(sdhci_send_command); |
d129bceb PO |
1083 | |
1084 | static void sdhci_finish_command(struct sdhci_host *host) | |
1085 | { | |
1086 | int i; | |
1087 | ||
1088 | BUG_ON(host->cmd == NULL); | |
1089 | ||
1090 | if (host->cmd->flags & MMC_RSP_PRESENT) { | |
1091 | if (host->cmd->flags & MMC_RSP_136) { | |
1092 | /* CRC is stripped so we need to do some shifting. */ | |
1093 | for (i = 0;i < 4;i++) { | |
4e4141a5 | 1094 | host->cmd->resp[i] = sdhci_readl(host, |
d129bceb PO |
1095 | SDHCI_RESPONSE + (3-i)*4) << 8; |
1096 | if (i != 3) | |
1097 | host->cmd->resp[i] |= | |
4e4141a5 | 1098 | sdhci_readb(host, |
d129bceb PO |
1099 | SDHCI_RESPONSE + (3-i)*4-1); |
1100 | } | |
1101 | } else { | |
4e4141a5 | 1102 | host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE); |
d129bceb PO |
1103 | } |
1104 | } | |
1105 | ||
17b0429d | 1106 | host->cmd->error = 0; |
d129bceb | 1107 | |
e89d456f AW |
1108 | /* Finished CMD23, now send actual command. */ |
1109 | if (host->cmd == host->mrq->sbc) { | |
1110 | host->cmd = NULL; | |
1111 | sdhci_send_command(host, host->mrq->cmd); | |
1112 | } else { | |
e538fbe8 | 1113 | |
e89d456f AW |
1114 | /* Processed actual command. */ |
1115 | if (host->data && host->data_early) | |
1116 | sdhci_finish_data(host); | |
d129bceb | 1117 | |
e89d456f AW |
1118 | if (!host->cmd->data) |
1119 | tasklet_schedule(&host->finish_tasklet); | |
1120 | ||
1121 | host->cmd = NULL; | |
1122 | } | |
d129bceb PO |
1123 | } |
1124 | ||
52983382 KL |
1125 | static u16 sdhci_get_preset_value(struct sdhci_host *host) |
1126 | { | |
d975f121 | 1127 | u16 preset = 0; |
52983382 | 1128 | |
d975f121 RK |
1129 | switch (host->timing) { |
1130 | case MMC_TIMING_UHS_SDR12: | |
52983382 KL |
1131 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12); |
1132 | break; | |
d975f121 | 1133 | case MMC_TIMING_UHS_SDR25: |
52983382 KL |
1134 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR25); |
1135 | break; | |
d975f121 | 1136 | case MMC_TIMING_UHS_SDR50: |
52983382 KL |
1137 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR50); |
1138 | break; | |
d975f121 RK |
1139 | case MMC_TIMING_UHS_SDR104: |
1140 | case MMC_TIMING_MMC_HS200: | |
52983382 KL |
1141 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104); |
1142 | break; | |
d975f121 | 1143 | case MMC_TIMING_UHS_DDR50: |
52983382 KL |
1144 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_DDR50); |
1145 | break; | |
e9fb05d5 AH |
1146 | case MMC_TIMING_MMC_HS400: |
1147 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400); | |
1148 | break; | |
52983382 KL |
1149 | default: |
1150 | pr_warn("%s: Invalid UHS-I mode selected\n", | |
1151 | mmc_hostname(host->mmc)); | |
1152 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12); | |
1153 | break; | |
1154 | } | |
1155 | return preset; | |
1156 | } | |
1157 | ||
1771059c | 1158 | void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) |
d129bceb | 1159 | { |
c3ed3877 | 1160 | int div = 0; /* Initialized for compiler warning */ |
df16219f | 1161 | int real_div = div, clk_mul = 1; |
c3ed3877 | 1162 | u16 clk = 0; |
7cb2c76f | 1163 | unsigned long timeout; |
d129bceb | 1164 | |
1650d0c7 RK |
1165 | host->mmc->actual_clock = 0; |
1166 | ||
4e4141a5 | 1167 | sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); |
d129bceb PO |
1168 | |
1169 | if (clock == 0) | |
373073ef | 1170 | return; |
d129bceb | 1171 | |
85105c53 | 1172 | if (host->version >= SDHCI_SPEC_300) { |
da91a8f9 | 1173 | if (host->preset_enabled) { |
52983382 KL |
1174 | u16 pre_val; |
1175 | ||
1176 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1177 | pre_val = sdhci_get_preset_value(host); | |
1178 | div = (pre_val & SDHCI_PRESET_SDCLK_FREQ_MASK) | |
1179 | >> SDHCI_PRESET_SDCLK_FREQ_SHIFT; | |
1180 | if (host->clk_mul && | |
1181 | (pre_val & SDHCI_PRESET_CLKGEN_SEL_MASK)) { | |
1182 | clk = SDHCI_PROG_CLOCK_MODE; | |
1183 | real_div = div + 1; | |
1184 | clk_mul = host->clk_mul; | |
1185 | } else { | |
1186 | real_div = max_t(int, 1, div << 1); | |
1187 | } | |
1188 | goto clock_set; | |
1189 | } | |
1190 | ||
c3ed3877 AN |
1191 | /* |
1192 | * Check if the Host Controller supports Programmable Clock | |
1193 | * Mode. | |
1194 | */ | |
1195 | if (host->clk_mul) { | |
52983382 KL |
1196 | for (div = 1; div <= 1024; div++) { |
1197 | if ((host->max_clk * host->clk_mul / div) | |
1198 | <= clock) | |
1199 | break; | |
1200 | } | |
c3ed3877 | 1201 | /* |
52983382 KL |
1202 | * Set Programmable Clock Mode in the Clock |
1203 | * Control register. | |
c3ed3877 | 1204 | */ |
52983382 KL |
1205 | clk = SDHCI_PROG_CLOCK_MODE; |
1206 | real_div = div; | |
1207 | clk_mul = host->clk_mul; | |
1208 | div--; | |
c3ed3877 AN |
1209 | } else { |
1210 | /* Version 3.00 divisors must be a multiple of 2. */ | |
1211 | if (host->max_clk <= clock) | |
1212 | div = 1; | |
1213 | else { | |
1214 | for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; | |
1215 | div += 2) { | |
1216 | if ((host->max_clk / div) <= clock) | |
1217 | break; | |
1218 | } | |
85105c53 | 1219 | } |
df16219f | 1220 | real_div = div; |
c3ed3877 | 1221 | div >>= 1; |
85105c53 ZG |
1222 | } |
1223 | } else { | |
1224 | /* Version 2.00 divisors must be a power of 2. */ | |
0397526d | 1225 | for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) { |
85105c53 ZG |
1226 | if ((host->max_clk / div) <= clock) |
1227 | break; | |
1228 | } | |
df16219f | 1229 | real_div = div; |
c3ed3877 | 1230 | div >>= 1; |
d129bceb | 1231 | } |
d129bceb | 1232 | |
52983382 | 1233 | clock_set: |
03d6f5ff | 1234 | if (real_div) |
df16219f | 1235 | host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div; |
c3ed3877 | 1236 | clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; |
85105c53 ZG |
1237 | clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) |
1238 | << SDHCI_DIVIDER_HI_SHIFT; | |
d129bceb | 1239 | clk |= SDHCI_CLOCK_INT_EN; |
4e4141a5 | 1240 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
d129bceb | 1241 | |
27f6cb16 CB |
1242 | /* Wait max 20 ms */ |
1243 | timeout = 20; | |
4e4141a5 | 1244 | while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) |
7cb2c76f PO |
1245 | & SDHCI_CLOCK_INT_STABLE)) { |
1246 | if (timeout == 0) { | |
a3c76eb9 | 1247 | pr_err("%s: Internal clock never " |
acf1da45 | 1248 | "stabilised.\n", mmc_hostname(host->mmc)); |
d129bceb PO |
1249 | sdhci_dumpregs(host); |
1250 | return; | |
1251 | } | |
7cb2c76f PO |
1252 | timeout--; |
1253 | mdelay(1); | |
1254 | } | |
d129bceb PO |
1255 | |
1256 | clk |= SDHCI_CLOCK_CARD_EN; | |
4e4141a5 | 1257 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
d129bceb | 1258 | } |
1771059c | 1259 | EXPORT_SYMBOL_GPL(sdhci_set_clock); |
d129bceb | 1260 | |
24fbb3ca RK |
1261 | static void sdhci_set_power(struct sdhci_host *host, unsigned char mode, |
1262 | unsigned short vdd) | |
146ad66e | 1263 | { |
3a48edc4 | 1264 | struct mmc_host *mmc = host->mmc; |
8364248a | 1265 | u8 pwr = 0; |
146ad66e | 1266 | |
52221610 TK |
1267 | if (!IS_ERR(mmc->supply.vmmc)) { |
1268 | spin_unlock_irq(&host->lock); | |
4e743f1f | 1269 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); |
52221610 | 1270 | spin_lock_irq(&host->lock); |
3cbc6123 TK |
1271 | |
1272 | if (mode != MMC_POWER_OFF) | |
1273 | sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL); | |
1274 | else | |
1275 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); | |
1276 | ||
52221610 TK |
1277 | return; |
1278 | } | |
1279 | ||
24fbb3ca RK |
1280 | if (mode != MMC_POWER_OFF) { |
1281 | switch (1 << vdd) { | |
ae628903 PO |
1282 | case MMC_VDD_165_195: |
1283 | pwr = SDHCI_POWER_180; | |
1284 | break; | |
1285 | case MMC_VDD_29_30: | |
1286 | case MMC_VDD_30_31: | |
1287 | pwr = SDHCI_POWER_300; | |
1288 | break; | |
1289 | case MMC_VDD_32_33: | |
1290 | case MMC_VDD_33_34: | |
1291 | pwr = SDHCI_POWER_330; | |
1292 | break; | |
1293 | default: | |
1294 | BUG(); | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | if (host->pwr == pwr) | |
e921a8b6 | 1299 | return; |
146ad66e | 1300 | |
ae628903 PO |
1301 | host->pwr = pwr; |
1302 | ||
1303 | if (pwr == 0) { | |
4e4141a5 | 1304 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
f0710a55 AH |
1305 | if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) |
1306 | sdhci_runtime_pm_bus_off(host); | |
24fbb3ca | 1307 | vdd = 0; |
e921a8b6 RK |
1308 | } else { |
1309 | /* | |
1310 | * Spec says that we should clear the power reg before setting | |
1311 | * a new value. Some controllers don't seem to like this though. | |
1312 | */ | |
1313 | if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE)) | |
1314 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); | |
146ad66e | 1315 | |
e921a8b6 RK |
1316 | /* |
1317 | * At least the Marvell CaFe chip gets confused if we set the | |
1318 | * voltage and set turn on power at the same time, so set the | |
1319 | * voltage first. | |
1320 | */ | |
1321 | if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) | |
1322 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); | |
e08c1694 | 1323 | |
e921a8b6 | 1324 | pwr |= SDHCI_POWER_ON; |
146ad66e | 1325 | |
e921a8b6 | 1326 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
557b0697 | 1327 | |
e921a8b6 RK |
1328 | if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) |
1329 | sdhci_runtime_pm_bus_on(host); | |
f0710a55 | 1330 | |
e921a8b6 RK |
1331 | /* |
1332 | * Some controllers need an extra 10ms delay of 10ms before | |
1333 | * they can apply clock after applying power | |
1334 | */ | |
1335 | if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) | |
1336 | mdelay(10); | |
1337 | } | |
146ad66e PO |
1338 | } |
1339 | ||
d129bceb PO |
1340 | /*****************************************************************************\ |
1341 | * * | |
1342 | * MMC callbacks * | |
1343 | * * | |
1344 | \*****************************************************************************/ | |
1345 | ||
1346 | static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1347 | { | |
1348 | struct sdhci_host *host; | |
505a8680 | 1349 | int present; |
d129bceb | 1350 | unsigned long flags; |
473b095a | 1351 | u32 tuning_opcode; |
d129bceb PO |
1352 | |
1353 | host = mmc_priv(mmc); | |
1354 | ||
66fd8ad5 AH |
1355 | sdhci_runtime_pm_get(host); |
1356 | ||
2836766a KK |
1357 | present = mmc_gpio_get_cd(host->mmc); |
1358 | ||
d129bceb PO |
1359 | spin_lock_irqsave(&host->lock, flags); |
1360 | ||
1361 | WARN_ON(host->mrq != NULL); | |
1362 | ||
f9134319 | 1363 | #ifndef SDHCI_USE_LEDS_CLASS |
d129bceb | 1364 | sdhci_activate_led(host); |
2f730fec | 1365 | #endif |
e89d456f AW |
1366 | |
1367 | /* | |
1368 | * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED | |
1369 | * requests if Auto-CMD12 is enabled. | |
1370 | */ | |
1371 | if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) { | |
c4512f79 JH |
1372 | if (mrq->stop) { |
1373 | mrq->data->stop = NULL; | |
1374 | mrq->stop = NULL; | |
1375 | } | |
1376 | } | |
d129bceb PO |
1377 | |
1378 | host->mrq = mrq; | |
1379 | ||
505a8680 SG |
1380 | /* |
1381 | * Firstly check card presence from cd-gpio. The return could | |
1382 | * be one of the following possibilities: | |
1383 | * negative: cd-gpio is not available | |
1384 | * zero: cd-gpio is used, and card is removed | |
1385 | * one: cd-gpio is used, and card is present | |
1386 | */ | |
505a8680 SG |
1387 | if (present < 0) { |
1388 | /* If polling, assume that the card is always present. */ | |
1389 | if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) | |
1390 | present = 1; | |
1391 | else | |
1392 | present = sdhci_readl(host, SDHCI_PRESENT_STATE) & | |
1393 | SDHCI_CARD_PRESENT; | |
bec9d4e5 GL |
1394 | } |
1395 | ||
68d1fb7e | 1396 | if (!present || host->flags & SDHCI_DEVICE_DEAD) { |
17b0429d | 1397 | host->mrq->cmd->error = -ENOMEDIUM; |
d129bceb | 1398 | tasklet_schedule(&host->finish_tasklet); |
cf2b5eea AN |
1399 | } else { |
1400 | u32 present_state; | |
1401 | ||
1402 | present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); | |
1403 | /* | |
1404 | * Check if the re-tuning timer has already expired and there | |
7756a96d YS |
1405 | * is no on-going data transfer and DAT0 is not busy. If so, |
1406 | * we need to execute tuning procedure before sending command. | |
cf2b5eea AN |
1407 | */ |
1408 | if ((host->flags & SDHCI_NEEDS_RETUNING) && | |
7756a96d YS |
1409 | !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ)) && |
1410 | (present_state & SDHCI_DATA_0_LVL_MASK)) { | |
14efd957 CB |
1411 | if (mmc->card) { |
1412 | /* eMMC uses cmd21 but sd and sdio use cmd19 */ | |
1413 | tuning_opcode = | |
1414 | mmc->card->type == MMC_TYPE_MMC ? | |
1415 | MMC_SEND_TUNING_BLOCK_HS200 : | |
1416 | MMC_SEND_TUNING_BLOCK; | |
63c21180 CL |
1417 | |
1418 | /* Here we need to set the host->mrq to NULL, | |
1419 | * in case the pending finish_tasklet | |
1420 | * finishes it incorrectly. | |
1421 | */ | |
1422 | host->mrq = NULL; | |
1423 | ||
14efd957 CB |
1424 | spin_unlock_irqrestore(&host->lock, flags); |
1425 | sdhci_execute_tuning(mmc, tuning_opcode); | |
1426 | spin_lock_irqsave(&host->lock, flags); | |
1427 | ||
1428 | /* Restore original mmc_request structure */ | |
1429 | host->mrq = mrq; | |
1430 | } | |
cf2b5eea AN |
1431 | } |
1432 | ||
8edf6371 | 1433 | if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23)) |
e89d456f AW |
1434 | sdhci_send_command(host, mrq->sbc); |
1435 | else | |
1436 | sdhci_send_command(host, mrq->cmd); | |
cf2b5eea | 1437 | } |
d129bceb | 1438 | |
5f25a66f | 1439 | mmiowb(); |
d129bceb PO |
1440 | spin_unlock_irqrestore(&host->lock, flags); |
1441 | } | |
1442 | ||
2317f56c RK |
1443 | void sdhci_set_bus_width(struct sdhci_host *host, int width) |
1444 | { | |
1445 | u8 ctrl; | |
1446 | ||
1447 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); | |
1448 | if (width == MMC_BUS_WIDTH_8) { | |
1449 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
1450 | if (host->version >= SDHCI_SPEC_300) | |
1451 | ctrl |= SDHCI_CTRL_8BITBUS; | |
1452 | } else { | |
1453 | if (host->version >= SDHCI_SPEC_300) | |
1454 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
1455 | if (width == MMC_BUS_WIDTH_4) | |
1456 | ctrl |= SDHCI_CTRL_4BITBUS; | |
1457 | else | |
1458 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
1459 | } | |
1460 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
1461 | } | |
1462 | EXPORT_SYMBOL_GPL(sdhci_set_bus_width); | |
1463 | ||
96d7b78c RK |
1464 | void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing) |
1465 | { | |
1466 | u16 ctrl_2; | |
1467 | ||
1468 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1469 | /* Select Bus Speed Mode for host */ | |
1470 | ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; | |
1471 | if ((timing == MMC_TIMING_MMC_HS200) || | |
1472 | (timing == MMC_TIMING_UHS_SDR104)) | |
1473 | ctrl_2 |= SDHCI_CTRL_UHS_SDR104; | |
1474 | else if (timing == MMC_TIMING_UHS_SDR12) | |
1475 | ctrl_2 |= SDHCI_CTRL_UHS_SDR12; | |
1476 | else if (timing == MMC_TIMING_UHS_SDR25) | |
1477 | ctrl_2 |= SDHCI_CTRL_UHS_SDR25; | |
1478 | else if (timing == MMC_TIMING_UHS_SDR50) | |
1479 | ctrl_2 |= SDHCI_CTRL_UHS_SDR50; | |
1480 | else if ((timing == MMC_TIMING_UHS_DDR50) || | |
1481 | (timing == MMC_TIMING_MMC_DDR52)) | |
1482 | ctrl_2 |= SDHCI_CTRL_UHS_DDR50; | |
e9fb05d5 AH |
1483 | else if (timing == MMC_TIMING_MMC_HS400) |
1484 | ctrl_2 |= SDHCI_CTRL_HS400; /* Non-standard */ | |
96d7b78c RK |
1485 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); |
1486 | } | |
1487 | EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling); | |
1488 | ||
66fd8ad5 | 1489 | static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) |
d129bceb | 1490 | { |
d129bceb PO |
1491 | unsigned long flags; |
1492 | u8 ctrl; | |
3a48edc4 | 1493 | struct mmc_host *mmc = host->mmc; |
d129bceb | 1494 | |
d129bceb PO |
1495 | spin_lock_irqsave(&host->lock, flags); |
1496 | ||
ceb6143b AH |
1497 | if (host->flags & SDHCI_DEVICE_DEAD) { |
1498 | spin_unlock_irqrestore(&host->lock, flags); | |
3a48edc4 TK |
1499 | if (!IS_ERR(mmc->supply.vmmc) && |
1500 | ios->power_mode == MMC_POWER_OFF) | |
4e743f1f | 1501 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); |
ceb6143b AH |
1502 | return; |
1503 | } | |
1e72859e | 1504 | |
d129bceb PO |
1505 | /* |
1506 | * Reset the chip on each power off. | |
1507 | * Should clear out any weird states. | |
1508 | */ | |
1509 | if (ios->power_mode == MMC_POWER_OFF) { | |
4e4141a5 | 1510 | sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); |
7260cf5e | 1511 | sdhci_reinit(host); |
d129bceb PO |
1512 | } |
1513 | ||
52983382 | 1514 | if (host->version >= SDHCI_SPEC_300 && |
372c4634 DA |
1515 | (ios->power_mode == MMC_POWER_UP) && |
1516 | !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) | |
52983382 KL |
1517 | sdhci_enable_preset_value(host, false); |
1518 | ||
373073ef | 1519 | if (!ios->clock || ios->clock != host->clock) { |
1771059c | 1520 | host->ops->set_clock(host, ios->clock); |
373073ef | 1521 | host->clock = ios->clock; |
03d6f5ff AD |
1522 | |
1523 | if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK && | |
1524 | host->clock) { | |
1525 | host->timeout_clk = host->mmc->actual_clock ? | |
1526 | host->mmc->actual_clock / 1000 : | |
1527 | host->clock / 1000; | |
1528 | host->mmc->max_busy_timeout = | |
1529 | host->ops->get_max_timeout_count ? | |
1530 | host->ops->get_max_timeout_count(host) : | |
1531 | 1 << 27; | |
1532 | host->mmc->max_busy_timeout /= host->timeout_clk; | |
1533 | } | |
373073ef | 1534 | } |
d129bceb | 1535 | |
24fbb3ca | 1536 | sdhci_set_power(host, ios->power_mode, ios->vdd); |
d129bceb | 1537 | |
643a81ff PR |
1538 | if (host->ops->platform_send_init_74_clocks) |
1539 | host->ops->platform_send_init_74_clocks(host, ios->power_mode); | |
1540 | ||
2317f56c | 1541 | host->ops->set_bus_width(host, ios->bus_width); |
ae6d6c92 | 1542 | |
15ec4461 | 1543 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
cd9277c0 | 1544 | |
3ab9c8da PR |
1545 | if ((ios->timing == MMC_TIMING_SD_HS || |
1546 | ios->timing == MMC_TIMING_MMC_HS) | |
1547 | && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)) | |
cd9277c0 PO |
1548 | ctrl |= SDHCI_CTRL_HISPD; |
1549 | else | |
1550 | ctrl &= ~SDHCI_CTRL_HISPD; | |
1551 | ||
d6d50a15 | 1552 | if (host->version >= SDHCI_SPEC_300) { |
49c468fc | 1553 | u16 clk, ctrl_2; |
49c468fc AN |
1554 | |
1555 | /* In case of UHS-I modes, set High Speed Enable */ | |
e9fb05d5 AH |
1556 | if ((ios->timing == MMC_TIMING_MMC_HS400) || |
1557 | (ios->timing == MMC_TIMING_MMC_HS200) || | |
bb8175a8 | 1558 | (ios->timing == MMC_TIMING_MMC_DDR52) || |
069c9f14 | 1559 | (ios->timing == MMC_TIMING_UHS_SDR50) || |
49c468fc AN |
1560 | (ios->timing == MMC_TIMING_UHS_SDR104) || |
1561 | (ios->timing == MMC_TIMING_UHS_DDR50) || | |
dd8df17f | 1562 | (ios->timing == MMC_TIMING_UHS_SDR25)) |
49c468fc | 1563 | ctrl |= SDHCI_CTRL_HISPD; |
d6d50a15 | 1564 | |
da91a8f9 | 1565 | if (!host->preset_enabled) { |
758535c4 | 1566 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d6d50a15 AN |
1567 | /* |
1568 | * We only need to set Driver Strength if the | |
1569 | * preset value enable is not set. | |
1570 | */ | |
da91a8f9 | 1571 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
d6d50a15 AN |
1572 | ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK; |
1573 | if (ios->drv_type == MMC_SET_DRIVER_TYPE_A) | |
1574 | ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A; | |
1575 | else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C) | |
1576 | ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C; | |
1577 | ||
1578 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); | |
758535c4 AN |
1579 | } else { |
1580 | /* | |
1581 | * According to SDHC Spec v3.00, if the Preset Value | |
1582 | * Enable in the Host Control 2 register is set, we | |
1583 | * need to reset SD Clock Enable before changing High | |
1584 | * Speed Enable to avoid generating clock gliches. | |
1585 | */ | |
758535c4 AN |
1586 | |
1587 | /* Reset SD Clock Enable */ | |
1588 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1589 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1590 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1591 | ||
1592 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
1593 | ||
1594 | /* Re-enable SD Clock */ | |
1771059c | 1595 | host->ops->set_clock(host, host->clock); |
d6d50a15 | 1596 | } |
49c468fc | 1597 | |
49c468fc AN |
1598 | /* Reset SD Clock Enable */ |
1599 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1600 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1601 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1602 | ||
96d7b78c | 1603 | host->ops->set_uhs_signaling(host, ios->timing); |
d975f121 | 1604 | host->timing = ios->timing; |
49c468fc | 1605 | |
52983382 KL |
1606 | if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN) && |
1607 | ((ios->timing == MMC_TIMING_UHS_SDR12) || | |
1608 | (ios->timing == MMC_TIMING_UHS_SDR25) || | |
1609 | (ios->timing == MMC_TIMING_UHS_SDR50) || | |
1610 | (ios->timing == MMC_TIMING_UHS_SDR104) || | |
1611 | (ios->timing == MMC_TIMING_UHS_DDR50))) { | |
1612 | u16 preset; | |
1613 | ||
1614 | sdhci_enable_preset_value(host, true); | |
1615 | preset = sdhci_get_preset_value(host); | |
1616 | ios->drv_type = (preset & SDHCI_PRESET_DRV_MASK) | |
1617 | >> SDHCI_PRESET_DRV_SHIFT; | |
1618 | } | |
1619 | ||
49c468fc | 1620 | /* Re-enable SD Clock */ |
1771059c | 1621 | host->ops->set_clock(host, host->clock); |
758535c4 AN |
1622 | } else |
1623 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
d6d50a15 | 1624 | |
b8352260 LD |
1625 | /* |
1626 | * Some (ENE) controllers go apeshit on some ios operation, | |
1627 | * signalling timeout and CRC errors even on CMD0. Resetting | |
1628 | * it on each ios seems to solve the problem. | |
1629 | */ | |
b8c86fc5 | 1630 | if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS) |
03231f9b | 1631 | sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); |
b8352260 | 1632 | |
5f25a66f | 1633 | mmiowb(); |
d129bceb PO |
1634 | spin_unlock_irqrestore(&host->lock, flags); |
1635 | } | |
1636 | ||
66fd8ad5 AH |
1637 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
1638 | { | |
1639 | struct sdhci_host *host = mmc_priv(mmc); | |
1640 | ||
1641 | sdhci_runtime_pm_get(host); | |
1642 | sdhci_do_set_ios(host, ios); | |
1643 | sdhci_runtime_pm_put(host); | |
1644 | } | |
1645 | ||
94144a46 KL |
1646 | static int sdhci_do_get_cd(struct sdhci_host *host) |
1647 | { | |
1648 | int gpio_cd = mmc_gpio_get_cd(host->mmc); | |
1649 | ||
1650 | if (host->flags & SDHCI_DEVICE_DEAD) | |
1651 | return 0; | |
1652 | ||
1653 | /* If polling/nonremovable, assume that the card is always present. */ | |
1654 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || | |
1655 | (host->mmc->caps & MMC_CAP_NONREMOVABLE)) | |
1656 | return 1; | |
1657 | ||
1658 | /* Try slot gpio detect */ | |
1659 | if (!IS_ERR_VALUE(gpio_cd)) | |
1660 | return !!gpio_cd; | |
1661 | ||
1662 | /* Host native card detect */ | |
1663 | return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); | |
1664 | } | |
1665 | ||
1666 | static int sdhci_get_cd(struct mmc_host *mmc) | |
1667 | { | |
1668 | struct sdhci_host *host = mmc_priv(mmc); | |
1669 | int ret; | |
1670 | ||
1671 | sdhci_runtime_pm_get(host); | |
1672 | ret = sdhci_do_get_cd(host); | |
1673 | sdhci_runtime_pm_put(host); | |
1674 | return ret; | |
1675 | } | |
1676 | ||
66fd8ad5 | 1677 | static int sdhci_check_ro(struct sdhci_host *host) |
d129bceb | 1678 | { |
d129bceb | 1679 | unsigned long flags; |
2dfb579c | 1680 | int is_readonly; |
d129bceb | 1681 | |
d129bceb PO |
1682 | spin_lock_irqsave(&host->lock, flags); |
1683 | ||
1e72859e | 1684 | if (host->flags & SDHCI_DEVICE_DEAD) |
2dfb579c WS |
1685 | is_readonly = 0; |
1686 | else if (host->ops->get_ro) | |
1687 | is_readonly = host->ops->get_ro(host); | |
1e72859e | 1688 | else |
2dfb579c WS |
1689 | is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE) |
1690 | & SDHCI_WRITE_PROTECT); | |
d129bceb PO |
1691 | |
1692 | spin_unlock_irqrestore(&host->lock, flags); | |
1693 | ||
2dfb579c WS |
1694 | /* This quirk needs to be replaced by a callback-function later */ |
1695 | return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ? | |
1696 | !is_readonly : is_readonly; | |
d129bceb PO |
1697 | } |
1698 | ||
82b0e23a TI |
1699 | #define SAMPLE_COUNT 5 |
1700 | ||
66fd8ad5 | 1701 | static int sdhci_do_get_ro(struct sdhci_host *host) |
82b0e23a | 1702 | { |
82b0e23a TI |
1703 | int i, ro_count; |
1704 | ||
82b0e23a | 1705 | if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT)) |
66fd8ad5 | 1706 | return sdhci_check_ro(host); |
82b0e23a TI |
1707 | |
1708 | ro_count = 0; | |
1709 | for (i = 0; i < SAMPLE_COUNT; i++) { | |
66fd8ad5 | 1710 | if (sdhci_check_ro(host)) { |
82b0e23a TI |
1711 | if (++ro_count > SAMPLE_COUNT / 2) |
1712 | return 1; | |
1713 | } | |
1714 | msleep(30); | |
1715 | } | |
1716 | return 0; | |
1717 | } | |
1718 | ||
20758b66 AH |
1719 | static void sdhci_hw_reset(struct mmc_host *mmc) |
1720 | { | |
1721 | struct sdhci_host *host = mmc_priv(mmc); | |
1722 | ||
1723 | if (host->ops && host->ops->hw_reset) | |
1724 | host->ops->hw_reset(host); | |
1725 | } | |
1726 | ||
66fd8ad5 | 1727 | static int sdhci_get_ro(struct mmc_host *mmc) |
f75979b7 | 1728 | { |
66fd8ad5 AH |
1729 | struct sdhci_host *host = mmc_priv(mmc); |
1730 | int ret; | |
f75979b7 | 1731 | |
66fd8ad5 AH |
1732 | sdhci_runtime_pm_get(host); |
1733 | ret = sdhci_do_get_ro(host); | |
1734 | sdhci_runtime_pm_put(host); | |
1735 | return ret; | |
1736 | } | |
f75979b7 | 1737 | |
66fd8ad5 AH |
1738 | static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable) |
1739 | { | |
be138554 | 1740 | if (!(host->flags & SDHCI_DEVICE_DEAD)) { |
ef104333 | 1741 | if (enable) |
b537f94c | 1742 | host->ier |= SDHCI_INT_CARD_INT; |
ef104333 | 1743 | else |
b537f94c RK |
1744 | host->ier &= ~SDHCI_INT_CARD_INT; |
1745 | ||
1746 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); | |
1747 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
ef104333 RK |
1748 | mmiowb(); |
1749 | } | |
66fd8ad5 AH |
1750 | } |
1751 | ||
1752 | static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) | |
1753 | { | |
1754 | struct sdhci_host *host = mmc_priv(mmc); | |
1755 | unsigned long flags; | |
f75979b7 | 1756 | |
ef104333 RK |
1757 | sdhci_runtime_pm_get(host); |
1758 | ||
66fd8ad5 | 1759 | spin_lock_irqsave(&host->lock, flags); |
ef104333 RK |
1760 | if (enable) |
1761 | host->flags |= SDHCI_SDIO_IRQ_ENABLED; | |
1762 | else | |
1763 | host->flags &= ~SDHCI_SDIO_IRQ_ENABLED; | |
1764 | ||
66fd8ad5 | 1765 | sdhci_enable_sdio_irq_nolock(host, enable); |
f75979b7 | 1766 | spin_unlock_irqrestore(&host->lock, flags); |
ef104333 RK |
1767 | |
1768 | sdhci_runtime_pm_put(host); | |
f75979b7 PO |
1769 | } |
1770 | ||
20b92a30 | 1771 | static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, |
21f5998f | 1772 | struct mmc_ios *ios) |
f2119df6 | 1773 | { |
3a48edc4 | 1774 | struct mmc_host *mmc = host->mmc; |
20b92a30 | 1775 | u16 ctrl; |
6231f3de | 1776 | int ret; |
f2119df6 | 1777 | |
20b92a30 KL |
1778 | /* |
1779 | * Signal Voltage Switching is only applicable for Host Controllers | |
1780 | * v3.00 and above. | |
1781 | */ | |
1782 | if (host->version < SDHCI_SPEC_300) | |
1783 | return 0; | |
6231f3de | 1784 | |
f2119df6 | 1785 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
f2119df6 | 1786 | |
21f5998f | 1787 | switch (ios->signal_voltage) { |
20b92a30 KL |
1788 | case MMC_SIGNAL_VOLTAGE_330: |
1789 | /* Set 1.8V Signal Enable in the Host Control2 register to 0 */ | |
1790 | ctrl &= ~SDHCI_CTRL_VDD_180; | |
1791 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
f2119df6 | 1792 | |
3a48edc4 TK |
1793 | if (!IS_ERR(mmc->supply.vqmmc)) { |
1794 | ret = regulator_set_voltage(mmc->supply.vqmmc, 2700000, | |
1795 | 3600000); | |
20b92a30 | 1796 | if (ret) { |
6606110d JP |
1797 | pr_warn("%s: Switching to 3.3V signalling voltage failed\n", |
1798 | mmc_hostname(mmc)); | |
20b92a30 KL |
1799 | return -EIO; |
1800 | } | |
1801 | } | |
1802 | /* Wait for 5ms */ | |
1803 | usleep_range(5000, 5500); | |
f2119df6 | 1804 | |
20b92a30 KL |
1805 | /* 3.3V regulator output should be stable within 5 ms */ |
1806 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1807 | if (!(ctrl & SDHCI_CTRL_VDD_180)) | |
1808 | return 0; | |
6231f3de | 1809 | |
6606110d JP |
1810 | pr_warn("%s: 3.3V regulator output did not became stable\n", |
1811 | mmc_hostname(mmc)); | |
20b92a30 KL |
1812 | |
1813 | return -EAGAIN; | |
1814 | case MMC_SIGNAL_VOLTAGE_180: | |
3a48edc4 TK |
1815 | if (!IS_ERR(mmc->supply.vqmmc)) { |
1816 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
20b92a30 KL |
1817 | 1700000, 1950000); |
1818 | if (ret) { | |
6606110d JP |
1819 | pr_warn("%s: Switching to 1.8V signalling voltage failed\n", |
1820 | mmc_hostname(mmc)); | |
20b92a30 KL |
1821 | return -EIO; |
1822 | } | |
1823 | } | |
6231f3de | 1824 | |
6231f3de PR |
1825 | /* |
1826 | * Enable 1.8V Signal Enable in the Host Control2 | |
1827 | * register | |
1828 | */ | |
20b92a30 KL |
1829 | ctrl |= SDHCI_CTRL_VDD_180; |
1830 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
6231f3de | 1831 | |
20b92a30 KL |
1832 | /* 1.8V regulator output should be stable within 5 ms */ |
1833 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1834 | if (ctrl & SDHCI_CTRL_VDD_180) | |
1835 | return 0; | |
f2119df6 | 1836 | |
6606110d JP |
1837 | pr_warn("%s: 1.8V regulator output did not became stable\n", |
1838 | mmc_hostname(mmc)); | |
f2119df6 | 1839 | |
20b92a30 KL |
1840 | return -EAGAIN; |
1841 | case MMC_SIGNAL_VOLTAGE_120: | |
3a48edc4 TK |
1842 | if (!IS_ERR(mmc->supply.vqmmc)) { |
1843 | ret = regulator_set_voltage(mmc->supply.vqmmc, 1100000, | |
1844 | 1300000); | |
20b92a30 | 1845 | if (ret) { |
6606110d JP |
1846 | pr_warn("%s: Switching to 1.2V signalling voltage failed\n", |
1847 | mmc_hostname(mmc)); | |
20b92a30 | 1848 | return -EIO; |
f2119df6 AN |
1849 | } |
1850 | } | |
6231f3de | 1851 | return 0; |
20b92a30 | 1852 | default: |
f2119df6 AN |
1853 | /* No signal voltage switch required */ |
1854 | return 0; | |
20b92a30 | 1855 | } |
f2119df6 AN |
1856 | } |
1857 | ||
66fd8ad5 | 1858 | static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, |
21f5998f | 1859 | struct mmc_ios *ios) |
66fd8ad5 AH |
1860 | { |
1861 | struct sdhci_host *host = mmc_priv(mmc); | |
1862 | int err; | |
1863 | ||
1864 | if (host->version < SDHCI_SPEC_300) | |
1865 | return 0; | |
1866 | sdhci_runtime_pm_get(host); | |
21f5998f | 1867 | err = sdhci_do_start_signal_voltage_switch(host, ios); |
66fd8ad5 AH |
1868 | sdhci_runtime_pm_put(host); |
1869 | return err; | |
1870 | } | |
1871 | ||
20b92a30 KL |
1872 | static int sdhci_card_busy(struct mmc_host *mmc) |
1873 | { | |
1874 | struct sdhci_host *host = mmc_priv(mmc); | |
1875 | u32 present_state; | |
1876 | ||
1877 | sdhci_runtime_pm_get(host); | |
1878 | /* Check whether DAT[3:0] is 0000 */ | |
1879 | present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); | |
1880 | sdhci_runtime_pm_put(host); | |
1881 | ||
1882 | return !(present_state & SDHCI_DATA_LVL_MASK); | |
1883 | } | |
1884 | ||
b5540ce1 AH |
1885 | static int sdhci_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) |
1886 | { | |
1887 | struct sdhci_host *host = mmc_priv(mmc); | |
1888 | unsigned long flags; | |
1889 | ||
1890 | spin_lock_irqsave(&host->lock, flags); | |
1891 | host->flags |= SDHCI_HS400_TUNING; | |
1892 | spin_unlock_irqrestore(&host->lock, flags); | |
1893 | ||
1894 | return 0; | |
1895 | } | |
1896 | ||
069c9f14 | 1897 | static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
b513ea25 | 1898 | { |
4b6f37d3 | 1899 | struct sdhci_host *host = mmc_priv(mmc); |
b513ea25 | 1900 | u16 ctrl; |
b513ea25 | 1901 | int tuning_loop_counter = MAX_TUNING_LOOP; |
b513ea25 | 1902 | int err = 0; |
2b35bd83 | 1903 | unsigned long flags; |
38e40bf5 | 1904 | unsigned int tuning_count = 0; |
b5540ce1 | 1905 | bool hs400_tuning; |
b513ea25 | 1906 | |
66fd8ad5 | 1907 | sdhci_runtime_pm_get(host); |
2b35bd83 | 1908 | spin_lock_irqsave(&host->lock, flags); |
b513ea25 | 1909 | |
b5540ce1 AH |
1910 | hs400_tuning = host->flags & SDHCI_HS400_TUNING; |
1911 | host->flags &= ~SDHCI_HS400_TUNING; | |
1912 | ||
38e40bf5 AH |
1913 | if (host->tuning_mode == SDHCI_TUNING_MODE_1) |
1914 | tuning_count = host->tuning_count; | |
1915 | ||
b513ea25 | 1916 | /* |
069c9f14 G |
1917 | * The Host Controller needs tuning only in case of SDR104 mode |
1918 | * and for SDR50 mode when Use Tuning for SDR50 is set in the | |
b513ea25 | 1919 | * Capabilities register. |
069c9f14 G |
1920 | * If the Host Controller supports the HS200 mode then the |
1921 | * tuning function has to be executed. | |
b513ea25 | 1922 | */ |
4b6f37d3 | 1923 | switch (host->timing) { |
b5540ce1 | 1924 | /* HS400 tuning is done in HS200 mode */ |
e9fb05d5 | 1925 | case MMC_TIMING_MMC_HS400: |
b5540ce1 AH |
1926 | err = -EINVAL; |
1927 | goto out_unlock; | |
1928 | ||
4b6f37d3 | 1929 | case MMC_TIMING_MMC_HS200: |
b5540ce1 AH |
1930 | /* |
1931 | * Periodic re-tuning for HS400 is not expected to be needed, so | |
1932 | * disable it here. | |
1933 | */ | |
1934 | if (hs400_tuning) | |
1935 | tuning_count = 0; | |
1936 | break; | |
1937 | ||
4b6f37d3 RK |
1938 | case MMC_TIMING_UHS_SDR104: |
1939 | break; | |
1940 | ||
1941 | case MMC_TIMING_UHS_SDR50: | |
1942 | if (host->flags & SDHCI_SDR50_NEEDS_TUNING || | |
1943 | host->flags & SDHCI_SDR104_NEEDS_TUNING) | |
1944 | break; | |
1945 | /* FALLTHROUGH */ | |
1946 | ||
1947 | default: | |
d519c863 | 1948 | goto out_unlock; |
b513ea25 AN |
1949 | } |
1950 | ||
45251812 | 1951 | if (host->ops->platform_execute_tuning) { |
2b35bd83 | 1952 | spin_unlock_irqrestore(&host->lock, flags); |
45251812 DA |
1953 | err = host->ops->platform_execute_tuning(host, opcode); |
1954 | sdhci_runtime_pm_put(host); | |
1955 | return err; | |
1956 | } | |
1957 | ||
4b6f37d3 RK |
1958 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
1959 | ctrl |= SDHCI_CTRL_EXEC_TUNING; | |
b513ea25 AN |
1960 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
1961 | ||
1962 | /* | |
1963 | * As per the Host Controller spec v3.00, tuning command | |
1964 | * generates Buffer Read Ready interrupt, so enable that. | |
1965 | * | |
1966 | * Note: The spec clearly says that when tuning sequence | |
1967 | * is being performed, the controller does not generate | |
1968 | * interrupts other than Buffer Read Ready interrupt. But | |
1969 | * to make sure we don't hit a controller bug, we _only_ | |
1970 | * enable Buffer Read Ready interrupt here. | |
1971 | */ | |
b537f94c RK |
1972 | sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE); |
1973 | sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE); | |
b513ea25 AN |
1974 | |
1975 | /* | |
1976 | * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number | |
1977 | * of loops reaches 40 times or a timeout of 150ms occurs. | |
1978 | */ | |
b513ea25 AN |
1979 | do { |
1980 | struct mmc_command cmd = {0}; | |
66fd8ad5 | 1981 | struct mmc_request mrq = {NULL}; |
b513ea25 | 1982 | |
069c9f14 | 1983 | cmd.opcode = opcode; |
b513ea25 AN |
1984 | cmd.arg = 0; |
1985 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
1986 | cmd.retries = 0; | |
1987 | cmd.data = NULL; | |
1988 | cmd.error = 0; | |
1989 | ||
7ce45e95 AC |
1990 | if (tuning_loop_counter-- == 0) |
1991 | break; | |
1992 | ||
b513ea25 AN |
1993 | mrq.cmd = &cmd; |
1994 | host->mrq = &mrq; | |
1995 | ||
1996 | /* | |
1997 | * In response to CMD19, the card sends 64 bytes of tuning | |
1998 | * block to the Host Controller. So we set the block size | |
1999 | * to 64 here. | |
2000 | */ | |
069c9f14 G |
2001 | if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200) { |
2002 | if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) | |
2003 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128), | |
2004 | SDHCI_BLOCK_SIZE); | |
2005 | else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) | |
2006 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), | |
2007 | SDHCI_BLOCK_SIZE); | |
2008 | } else { | |
2009 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), | |
2010 | SDHCI_BLOCK_SIZE); | |
2011 | } | |
b513ea25 AN |
2012 | |
2013 | /* | |
2014 | * The tuning block is sent by the card to the host controller. | |
2015 | * So we set the TRNS_READ bit in the Transfer Mode register. | |
2016 | * This also takes care of setting DMA Enable and Multi Block | |
2017 | * Select in the same register to 0. | |
2018 | */ | |
2019 | sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); | |
2020 | ||
2021 | sdhci_send_command(host, &cmd); | |
2022 | ||
2023 | host->cmd = NULL; | |
2024 | host->mrq = NULL; | |
2025 | ||
2b35bd83 | 2026 | spin_unlock_irqrestore(&host->lock, flags); |
b513ea25 AN |
2027 | /* Wait for Buffer Read Ready interrupt */ |
2028 | wait_event_interruptible_timeout(host->buf_ready_int, | |
2029 | (host->tuning_done == 1), | |
2030 | msecs_to_jiffies(50)); | |
2b35bd83 | 2031 | spin_lock_irqsave(&host->lock, flags); |
b513ea25 AN |
2032 | |
2033 | if (!host->tuning_done) { | |
a3c76eb9 | 2034 | pr_info(DRIVER_NAME ": Timeout waiting for " |
b513ea25 AN |
2035 | "Buffer Read Ready interrupt during tuning " |
2036 | "procedure, falling back to fixed sampling " | |
2037 | "clock\n"); | |
2038 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
2039 | ctrl &= ~SDHCI_CTRL_TUNED_CLK; | |
2040 | ctrl &= ~SDHCI_CTRL_EXEC_TUNING; | |
2041 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
2042 | ||
2043 | err = -EIO; | |
2044 | goto out; | |
2045 | } | |
2046 | ||
2047 | host->tuning_done = 0; | |
2048 | ||
2049 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
197160d5 NS |
2050 | |
2051 | /* eMMC spec does not require a delay between tuning cycles */ | |
2052 | if (opcode == MMC_SEND_TUNING_BLOCK) | |
2053 | mdelay(1); | |
b513ea25 AN |
2054 | } while (ctrl & SDHCI_CTRL_EXEC_TUNING); |
2055 | ||
2056 | /* | |
2057 | * The Host Driver has exhausted the maximum number of loops allowed, | |
2058 | * so use fixed sampling frequency. | |
2059 | */ | |
7ce45e95 | 2060 | if (tuning_loop_counter < 0) { |
b513ea25 AN |
2061 | ctrl &= ~SDHCI_CTRL_TUNED_CLK; |
2062 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
7ce45e95 AC |
2063 | } |
2064 | if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { | |
2065 | pr_info(DRIVER_NAME ": Tuning procedure" | |
2066 | " failed, falling back to fixed sampling" | |
2067 | " clock\n"); | |
114f2bf6 | 2068 | err = -EIO; |
b513ea25 AN |
2069 | } |
2070 | ||
2071 | out: | |
38e40bf5 AH |
2072 | host->flags &= ~SDHCI_NEEDS_RETUNING; |
2073 | ||
2074 | if (tuning_count) { | |
973905fe | 2075 | host->flags |= SDHCI_USING_RETUNING_TIMER; |
38e40bf5 | 2076 | mod_timer(&host->tuning_timer, jiffies + tuning_count * HZ); |
cf2b5eea AN |
2077 | } |
2078 | ||
2079 | /* | |
2080 | * In case tuning fails, host controllers which support re-tuning can | |
2081 | * try tuning again at a later time, when the re-tuning timer expires. | |
2082 | * So for these controllers, we return 0. Since there might be other | |
2083 | * controllers who do not have this capability, we return error for | |
973905fe AL |
2084 | * them. SDHCI_USING_RETUNING_TIMER means the host is currently using |
2085 | * a retuning timer to do the retuning for the card. | |
cf2b5eea | 2086 | */ |
973905fe | 2087 | if (err && (host->flags & SDHCI_USING_RETUNING_TIMER)) |
cf2b5eea AN |
2088 | err = 0; |
2089 | ||
b537f94c RK |
2090 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); |
2091 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
d519c863 | 2092 | out_unlock: |
2b35bd83 | 2093 | spin_unlock_irqrestore(&host->lock, flags); |
66fd8ad5 | 2094 | sdhci_runtime_pm_put(host); |
b513ea25 AN |
2095 | |
2096 | return err; | |
2097 | } | |
2098 | ||
52983382 KL |
2099 | |
2100 | static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) | |
4d55c5a1 | 2101 | { |
4d55c5a1 AN |
2102 | /* Host Controller v3.00 defines preset value registers */ |
2103 | if (host->version < SDHCI_SPEC_300) | |
2104 | return; | |
2105 | ||
4d55c5a1 AN |
2106 | /* |
2107 | * We only enable or disable Preset Value if they are not already | |
2108 | * enabled or disabled respectively. Otherwise, we bail out. | |
2109 | */ | |
da91a8f9 RK |
2110 | if (host->preset_enabled != enable) { |
2111 | u16 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
2112 | ||
2113 | if (enable) | |
2114 | ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE; | |
2115 | else | |
2116 | ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; | |
2117 | ||
4d55c5a1 | 2118 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
da91a8f9 RK |
2119 | |
2120 | if (enable) | |
2121 | host->flags |= SDHCI_PV_ENABLED; | |
2122 | else | |
2123 | host->flags &= ~SDHCI_PV_ENABLED; | |
2124 | ||
2125 | host->preset_enabled = enable; | |
4d55c5a1 | 2126 | } |
66fd8ad5 AH |
2127 | } |
2128 | ||
348487cb HC |
2129 | static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq, |
2130 | int err) | |
2131 | { | |
2132 | struct sdhci_host *host = mmc_priv(mmc); | |
2133 | struct mmc_data *data = mrq->data; | |
2134 | ||
2135 | if (host->flags & SDHCI_REQ_USE_DMA) { | |
2136 | if (data->host_cookie) | |
2137 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
2138 | data->flags & MMC_DATA_WRITE ? | |
2139 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
2140 | mrq->data->host_cookie = 0; | |
2141 | } | |
2142 | } | |
2143 | ||
2144 | static int sdhci_pre_dma_transfer(struct sdhci_host *host, | |
2145 | struct mmc_data *data, | |
2146 | struct sdhci_host_next *next) | |
2147 | { | |
2148 | int sg_count; | |
2149 | ||
2150 | if (!next && data->host_cookie && | |
2151 | data->host_cookie != host->next_data.cookie) { | |
2152 | pr_debug(DRIVER_NAME "[%s] invalid cookie: %d, next-cookie %d\n", | |
2153 | __func__, data->host_cookie, host->next_data.cookie); | |
2154 | data->host_cookie = 0; | |
2155 | } | |
2156 | ||
2157 | /* Check if next job is already prepared */ | |
2158 | if (next || | |
2159 | (!next && data->host_cookie != host->next_data.cookie)) { | |
2160 | sg_count = dma_map_sg(mmc_dev(host->mmc), data->sg, | |
2161 | data->sg_len, | |
2162 | data->flags & MMC_DATA_WRITE ? | |
2163 | DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
2164 | ||
2165 | } else { | |
2166 | sg_count = host->next_data.sg_count; | |
2167 | host->next_data.sg_count = 0; | |
2168 | } | |
2169 | ||
2170 | ||
2171 | if (sg_count == 0) | |
2172 | return -EINVAL; | |
2173 | ||
2174 | if (next) { | |
2175 | next->sg_count = sg_count; | |
2176 | data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie; | |
2177 | } else | |
2178 | host->sg_count = sg_count; | |
2179 | ||
2180 | return sg_count; | |
2181 | } | |
2182 | ||
2183 | static void sdhci_pre_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
2184 | bool is_first_req) | |
2185 | { | |
2186 | struct sdhci_host *host = mmc_priv(mmc); | |
2187 | ||
2188 | if (mrq->data->host_cookie) { | |
2189 | mrq->data->host_cookie = 0; | |
2190 | return; | |
2191 | } | |
2192 | ||
2193 | if (host->flags & SDHCI_REQ_USE_DMA) | |
2194 | if (sdhci_pre_dma_transfer(host, | |
2195 | mrq->data, | |
2196 | &host->next_data) < 0) | |
2197 | mrq->data->host_cookie = 0; | |
2198 | } | |
2199 | ||
71e69211 | 2200 | static void sdhci_card_event(struct mmc_host *mmc) |
d129bceb | 2201 | { |
71e69211 | 2202 | struct sdhci_host *host = mmc_priv(mmc); |
d129bceb | 2203 | unsigned long flags; |
2836766a | 2204 | int present; |
d129bceb | 2205 | |
722e1280 CD |
2206 | /* First check if client has provided their own card event */ |
2207 | if (host->ops->card_event) | |
2208 | host->ops->card_event(host); | |
2209 | ||
2836766a KK |
2210 | present = sdhci_do_get_cd(host); |
2211 | ||
d129bceb PO |
2212 | spin_lock_irqsave(&host->lock, flags); |
2213 | ||
66fd8ad5 | 2214 | /* Check host->mrq first in case we are runtime suspended */ |
2836766a | 2215 | if (host->mrq && !present) { |
a3c76eb9 | 2216 | pr_err("%s: Card removed during transfer!\n", |
66fd8ad5 | 2217 | mmc_hostname(host->mmc)); |
a3c76eb9 | 2218 | pr_err("%s: Resetting controller.\n", |
66fd8ad5 | 2219 | mmc_hostname(host->mmc)); |
d129bceb | 2220 | |
03231f9b RK |
2221 | sdhci_do_reset(host, SDHCI_RESET_CMD); |
2222 | sdhci_do_reset(host, SDHCI_RESET_DATA); | |
d129bceb | 2223 | |
66fd8ad5 AH |
2224 | host->mrq->cmd->error = -ENOMEDIUM; |
2225 | tasklet_schedule(&host->finish_tasklet); | |
d129bceb PO |
2226 | } |
2227 | ||
2228 | spin_unlock_irqrestore(&host->lock, flags); | |
71e69211 GL |
2229 | } |
2230 | ||
2231 | static const struct mmc_host_ops sdhci_ops = { | |
2232 | .request = sdhci_request, | |
348487cb HC |
2233 | .post_req = sdhci_post_req, |
2234 | .pre_req = sdhci_pre_req, | |
71e69211 | 2235 | .set_ios = sdhci_set_ios, |
94144a46 | 2236 | .get_cd = sdhci_get_cd, |
71e69211 GL |
2237 | .get_ro = sdhci_get_ro, |
2238 | .hw_reset = sdhci_hw_reset, | |
2239 | .enable_sdio_irq = sdhci_enable_sdio_irq, | |
2240 | .start_signal_voltage_switch = sdhci_start_signal_voltage_switch, | |
b5540ce1 | 2241 | .prepare_hs400_tuning = sdhci_prepare_hs400_tuning, |
71e69211 | 2242 | .execute_tuning = sdhci_execute_tuning, |
71e69211 | 2243 | .card_event = sdhci_card_event, |
20b92a30 | 2244 | .card_busy = sdhci_card_busy, |
71e69211 GL |
2245 | }; |
2246 | ||
2247 | /*****************************************************************************\ | |
2248 | * * | |
2249 | * Tasklets * | |
2250 | * * | |
2251 | \*****************************************************************************/ | |
2252 | ||
d129bceb PO |
2253 | static void sdhci_tasklet_finish(unsigned long param) |
2254 | { | |
2255 | struct sdhci_host *host; | |
2256 | unsigned long flags; | |
2257 | struct mmc_request *mrq; | |
2258 | ||
2259 | host = (struct sdhci_host*)param; | |
2260 | ||
66fd8ad5 AH |
2261 | spin_lock_irqsave(&host->lock, flags); |
2262 | ||
0c9c99a7 CB |
2263 | /* |
2264 | * If this tasklet gets rescheduled while running, it will | |
2265 | * be run again afterwards but without any active request. | |
2266 | */ | |
66fd8ad5 AH |
2267 | if (!host->mrq) { |
2268 | spin_unlock_irqrestore(&host->lock, flags); | |
0c9c99a7 | 2269 | return; |
66fd8ad5 | 2270 | } |
d129bceb PO |
2271 | |
2272 | del_timer(&host->timer); | |
2273 | ||
2274 | mrq = host->mrq; | |
2275 | ||
d129bceb PO |
2276 | /* |
2277 | * The controller needs a reset of internal state machines | |
2278 | * upon error conditions. | |
2279 | */ | |
1e72859e | 2280 | if (!(host->flags & SDHCI_DEVICE_DEAD) && |
b7b4d342 | 2281 | ((mrq->cmd && mrq->cmd->error) || |
fce9d33f AG |
2282 | (mrq->sbc && mrq->sbc->error) || |
2283 | (mrq->data && ((mrq->data->error && !mrq->data->stop) || | |
2284 | (mrq->data->stop && mrq->data->stop->error))) || | |
2285 | (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { | |
645289dc PO |
2286 | |
2287 | /* Some controllers need this kick or reset won't work here */ | |
8213af3b | 2288 | if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) |
645289dc | 2289 | /* This is to force an update */ |
1771059c | 2290 | host->ops->set_clock(host, host->clock); |
645289dc PO |
2291 | |
2292 | /* Spec says we should do both at the same time, but Ricoh | |
2293 | controllers do not like that. */ | |
03231f9b RK |
2294 | sdhci_do_reset(host, SDHCI_RESET_CMD); |
2295 | sdhci_do_reset(host, SDHCI_RESET_DATA); | |
d129bceb PO |
2296 | } |
2297 | ||
2298 | host->mrq = NULL; | |
2299 | host->cmd = NULL; | |
2300 | host->data = NULL; | |
2301 | ||
f9134319 | 2302 | #ifndef SDHCI_USE_LEDS_CLASS |
d129bceb | 2303 | sdhci_deactivate_led(host); |
2f730fec | 2304 | #endif |
d129bceb | 2305 | |
5f25a66f | 2306 | mmiowb(); |
d129bceb PO |
2307 | spin_unlock_irqrestore(&host->lock, flags); |
2308 | ||
2309 | mmc_request_done(host->mmc, mrq); | |
66fd8ad5 | 2310 | sdhci_runtime_pm_put(host); |
d129bceb PO |
2311 | } |
2312 | ||
2313 | static void sdhci_timeout_timer(unsigned long data) | |
2314 | { | |
2315 | struct sdhci_host *host; | |
2316 | unsigned long flags; | |
2317 | ||
2318 | host = (struct sdhci_host*)data; | |
2319 | ||
2320 | spin_lock_irqsave(&host->lock, flags); | |
2321 | ||
2322 | if (host->mrq) { | |
a3c76eb9 | 2323 | pr_err("%s: Timeout waiting for hardware " |
acf1da45 | 2324 | "interrupt.\n", mmc_hostname(host->mmc)); |
d129bceb PO |
2325 | sdhci_dumpregs(host); |
2326 | ||
2327 | if (host->data) { | |
17b0429d | 2328 | host->data->error = -ETIMEDOUT; |
d129bceb PO |
2329 | sdhci_finish_data(host); |
2330 | } else { | |
2331 | if (host->cmd) | |
17b0429d | 2332 | host->cmd->error = -ETIMEDOUT; |
d129bceb | 2333 | else |
17b0429d | 2334 | host->mrq->cmd->error = -ETIMEDOUT; |
d129bceb PO |
2335 | |
2336 | tasklet_schedule(&host->finish_tasklet); | |
2337 | } | |
2338 | } | |
2339 | ||
5f25a66f | 2340 | mmiowb(); |
d129bceb PO |
2341 | spin_unlock_irqrestore(&host->lock, flags); |
2342 | } | |
2343 | ||
cf2b5eea AN |
2344 | static void sdhci_tuning_timer(unsigned long data) |
2345 | { | |
2346 | struct sdhci_host *host; | |
2347 | unsigned long flags; | |
2348 | ||
2349 | host = (struct sdhci_host *)data; | |
2350 | ||
2351 | spin_lock_irqsave(&host->lock, flags); | |
2352 | ||
2353 | host->flags |= SDHCI_NEEDS_RETUNING; | |
2354 | ||
2355 | spin_unlock_irqrestore(&host->lock, flags); | |
2356 | } | |
2357 | ||
d129bceb PO |
2358 | /*****************************************************************************\ |
2359 | * * | |
2360 | * Interrupt handling * | |
2361 | * * | |
2362 | \*****************************************************************************/ | |
2363 | ||
61541397 | 2364 | static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *mask) |
d129bceb PO |
2365 | { |
2366 | BUG_ON(intmask == 0); | |
2367 | ||
2368 | if (!host->cmd) { | |
a3c76eb9 | 2369 | pr_err("%s: Got command interrupt 0x%08x even " |
b67ac3f3 PO |
2370 | "though no command operation was in progress.\n", |
2371 | mmc_hostname(host->mmc), (unsigned)intmask); | |
d129bceb PO |
2372 | sdhci_dumpregs(host); |
2373 | return; | |
2374 | } | |
2375 | ||
43b58b36 | 2376 | if (intmask & SDHCI_INT_TIMEOUT) |
17b0429d PO |
2377 | host->cmd->error = -ETIMEDOUT; |
2378 | else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT | | |
2379 | SDHCI_INT_INDEX)) | |
2380 | host->cmd->error = -EILSEQ; | |
43b58b36 | 2381 | |
e809517f | 2382 | if (host->cmd->error) { |
d129bceb | 2383 | tasklet_schedule(&host->finish_tasklet); |
e809517f PO |
2384 | return; |
2385 | } | |
2386 | ||
2387 | /* | |
2388 | * The host can send and interrupt when the busy state has | |
2389 | * ended, allowing us to wait without wasting CPU cycles. | |
2390 | * Unfortunately this is overloaded on the "data complete" | |
2391 | * interrupt, so we need to take some care when handling | |
2392 | * it. | |
2393 | * | |
2394 | * Note: The 1.0 specification is a bit ambiguous about this | |
2395 | * feature so there might be some problems with older | |
2396 | * controllers. | |
2397 | */ | |
2398 | if (host->cmd->flags & MMC_RSP_BUSY) { | |
2399 | if (host->cmd->data) | |
2400 | DBG("Cannot wait for busy signal when also " | |
2401 | "doing a data transfer"); | |
e99783a4 CM |
2402 | else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ) |
2403 | && !host->busy_handle) { | |
2404 | /* Mark that command complete before busy is ended */ | |
2405 | host->busy_handle = 1; | |
e809517f | 2406 | return; |
e99783a4 | 2407 | } |
f945405c BD |
2408 | |
2409 | /* The controller does not support the end-of-busy IRQ, | |
2410 | * fall through and take the SDHCI_INT_RESPONSE */ | |
61541397 AH |
2411 | } else if ((host->quirks2 & SDHCI_QUIRK2_STOP_WITH_TC) && |
2412 | host->cmd->opcode == MMC_STOP_TRANSMISSION && !host->data) { | |
2413 | *mask &= ~SDHCI_INT_DATA_END; | |
e809517f PO |
2414 | } |
2415 | ||
2416 | if (intmask & SDHCI_INT_RESPONSE) | |
43b58b36 | 2417 | sdhci_finish_command(host); |
d129bceb PO |
2418 | } |
2419 | ||
0957c333 | 2420 | #ifdef CONFIG_MMC_DEBUG |
08621b18 | 2421 | static void sdhci_adma_show_error(struct sdhci_host *host) |
6882a8c0 BD |
2422 | { |
2423 | const char *name = mmc_hostname(host->mmc); | |
1c3d5f6d | 2424 | void *desc = host->adma_table; |
6882a8c0 BD |
2425 | |
2426 | sdhci_dumpregs(host); | |
2427 | ||
2428 | while (true) { | |
e57a5f61 AH |
2429 | struct sdhci_adma2_64_desc *dma_desc = desc; |
2430 | ||
2431 | if (host->flags & SDHCI_USE_64_BIT_DMA) | |
2432 | DBG("%s: %p: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n", | |
2433 | name, desc, le32_to_cpu(dma_desc->addr_hi), | |
2434 | le32_to_cpu(dma_desc->addr_lo), | |
2435 | le16_to_cpu(dma_desc->len), | |
2436 | le16_to_cpu(dma_desc->cmd)); | |
2437 | else | |
2438 | DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", | |
2439 | name, desc, le32_to_cpu(dma_desc->addr_lo), | |
2440 | le16_to_cpu(dma_desc->len), | |
2441 | le16_to_cpu(dma_desc->cmd)); | |
6882a8c0 | 2442 | |
76fe379a | 2443 | desc += host->desc_sz; |
6882a8c0 | 2444 | |
0545230f | 2445 | if (dma_desc->cmd & cpu_to_le16(ADMA2_END)) |
6882a8c0 BD |
2446 | break; |
2447 | } | |
2448 | } | |
2449 | #else | |
08621b18 | 2450 | static void sdhci_adma_show_error(struct sdhci_host *host) { } |
6882a8c0 BD |
2451 | #endif |
2452 | ||
d129bceb PO |
2453 | static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) |
2454 | { | |
069c9f14 | 2455 | u32 command; |
d129bceb PO |
2456 | BUG_ON(intmask == 0); |
2457 | ||
b513ea25 AN |
2458 | /* CMD19 generates _only_ Buffer Read Ready interrupt */ |
2459 | if (intmask & SDHCI_INT_DATA_AVAIL) { | |
069c9f14 G |
2460 | command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)); |
2461 | if (command == MMC_SEND_TUNING_BLOCK || | |
2462 | command == MMC_SEND_TUNING_BLOCK_HS200) { | |
b513ea25 AN |
2463 | host->tuning_done = 1; |
2464 | wake_up(&host->buf_ready_int); | |
2465 | return; | |
2466 | } | |
2467 | } | |
2468 | ||
d129bceb PO |
2469 | if (!host->data) { |
2470 | /* | |
e809517f PO |
2471 | * The "data complete" interrupt is also used to |
2472 | * indicate that a busy state has ended. See comment | |
2473 | * above in sdhci_cmd_irq(). | |
d129bceb | 2474 | */ |
e809517f | 2475 | if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) { |
c5abd5e8 MC |
2476 | if (intmask & SDHCI_INT_DATA_TIMEOUT) { |
2477 | host->cmd->error = -ETIMEDOUT; | |
2478 | tasklet_schedule(&host->finish_tasklet); | |
2479 | return; | |
2480 | } | |
e809517f | 2481 | if (intmask & SDHCI_INT_DATA_END) { |
e99783a4 CM |
2482 | /* |
2483 | * Some cards handle busy-end interrupt | |
2484 | * before the command completed, so make | |
2485 | * sure we do things in the proper order. | |
2486 | */ | |
2487 | if (host->busy_handle) | |
2488 | sdhci_finish_command(host); | |
2489 | else | |
2490 | host->busy_handle = 1; | |
e809517f PO |
2491 | return; |
2492 | } | |
2493 | } | |
d129bceb | 2494 | |
a3c76eb9 | 2495 | pr_err("%s: Got data interrupt 0x%08x even " |
b67ac3f3 PO |
2496 | "though no data operation was in progress.\n", |
2497 | mmc_hostname(host->mmc), (unsigned)intmask); | |
d129bceb PO |
2498 | sdhci_dumpregs(host); |
2499 | ||
2500 | return; | |
2501 | } | |
2502 | ||
2503 | if (intmask & SDHCI_INT_DATA_TIMEOUT) | |
17b0429d | 2504 | host->data->error = -ETIMEDOUT; |
22113efd AL |
2505 | else if (intmask & SDHCI_INT_DATA_END_BIT) |
2506 | host->data->error = -EILSEQ; | |
2507 | else if ((intmask & SDHCI_INT_DATA_CRC) && | |
2508 | SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) | |
2509 | != MMC_BUS_TEST_R) | |
17b0429d | 2510 | host->data->error = -EILSEQ; |
6882a8c0 | 2511 | else if (intmask & SDHCI_INT_ADMA_ERROR) { |
a3c76eb9 | 2512 | pr_err("%s: ADMA error\n", mmc_hostname(host->mmc)); |
08621b18 | 2513 | sdhci_adma_show_error(host); |
2134a922 | 2514 | host->data->error = -EIO; |
a4071fbb HZ |
2515 | if (host->ops->adma_workaround) |
2516 | host->ops->adma_workaround(host, intmask); | |
6882a8c0 | 2517 | } |
d129bceb | 2518 | |
17b0429d | 2519 | if (host->data->error) |
d129bceb PO |
2520 | sdhci_finish_data(host); |
2521 | else { | |
a406f5a3 | 2522 | if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) |
d129bceb PO |
2523 | sdhci_transfer_pio(host); |
2524 | ||
6ba736a1 PO |
2525 | /* |
2526 | * We currently don't do anything fancy with DMA | |
2527 | * boundaries, but as we can't disable the feature | |
2528 | * we need to at least restart the transfer. | |
f6a03cbf MV |
2529 | * |
2530 | * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS) | |
2531 | * should return a valid address to continue from, but as | |
2532 | * some controllers are faulty, don't trust them. | |
6ba736a1 | 2533 | */ |
f6a03cbf MV |
2534 | if (intmask & SDHCI_INT_DMA_END) { |
2535 | u32 dmastart, dmanow; | |
2536 | dmastart = sg_dma_address(host->data->sg); | |
2537 | dmanow = dmastart + host->data->bytes_xfered; | |
2538 | /* | |
2539 | * Force update to the next DMA block boundary. | |
2540 | */ | |
2541 | dmanow = (dmanow & | |
2542 | ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) + | |
2543 | SDHCI_DEFAULT_BOUNDARY_SIZE; | |
2544 | host->data->bytes_xfered = dmanow - dmastart; | |
2545 | DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes," | |
2546 | " next 0x%08x\n", | |
2547 | mmc_hostname(host->mmc), dmastart, | |
2548 | host->data->bytes_xfered, dmanow); | |
2549 | sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS); | |
2550 | } | |
6ba736a1 | 2551 | |
e538fbe8 PO |
2552 | if (intmask & SDHCI_INT_DATA_END) { |
2553 | if (host->cmd) { | |
2554 | /* | |
2555 | * Data managed to finish before the | |
2556 | * command completed. Make sure we do | |
2557 | * things in the proper order. | |
2558 | */ | |
2559 | host->data_early = 1; | |
2560 | } else { | |
2561 | sdhci_finish_data(host); | |
2562 | } | |
2563 | } | |
d129bceb PO |
2564 | } |
2565 | } | |
2566 | ||
7d12e780 | 2567 | static irqreturn_t sdhci_irq(int irq, void *dev_id) |
d129bceb | 2568 | { |
781e989c | 2569 | irqreturn_t result = IRQ_NONE; |
66fd8ad5 | 2570 | struct sdhci_host *host = dev_id; |
41005003 | 2571 | u32 intmask, mask, unexpected = 0; |
781e989c | 2572 | int max_loops = 16; |
d129bceb PO |
2573 | |
2574 | spin_lock(&host->lock); | |
2575 | ||
be138554 | 2576 | if (host->runtime_suspended && !sdhci_sdio_irq_enabled(host)) { |
66fd8ad5 | 2577 | spin_unlock(&host->lock); |
655bca76 | 2578 | return IRQ_NONE; |
66fd8ad5 AH |
2579 | } |
2580 | ||
4e4141a5 | 2581 | intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
62df67a5 | 2582 | if (!intmask || intmask == 0xffffffff) { |
d129bceb PO |
2583 | result = IRQ_NONE; |
2584 | goto out; | |
2585 | } | |
2586 | ||
41005003 RK |
2587 | do { |
2588 | /* Clear selected interrupts. */ | |
2589 | mask = intmask & (SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK | | |
2590 | SDHCI_INT_BUS_POWER); | |
2591 | sdhci_writel(host, mask, SDHCI_INT_STATUS); | |
d129bceb | 2592 | |
41005003 RK |
2593 | DBG("*** %s got interrupt: 0x%08x\n", |
2594 | mmc_hostname(host->mmc), intmask); | |
d129bceb | 2595 | |
41005003 RK |
2596 | if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { |
2597 | u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) & | |
2598 | SDHCI_CARD_PRESENT; | |
d129bceb | 2599 | |
41005003 RK |
2600 | /* |
2601 | * There is a observation on i.mx esdhc. INSERT | |
2602 | * bit will be immediately set again when it gets | |
2603 | * cleared, if a card is inserted. We have to mask | |
2604 | * the irq to prevent interrupt storm which will | |
2605 | * freeze the system. And the REMOVE gets the | |
2606 | * same situation. | |
2607 | * | |
2608 | * More testing are needed here to ensure it works | |
2609 | * for other platforms though. | |
2610 | */ | |
b537f94c RK |
2611 | host->ier &= ~(SDHCI_INT_CARD_INSERT | |
2612 | SDHCI_INT_CARD_REMOVE); | |
2613 | host->ier |= present ? SDHCI_INT_CARD_REMOVE : | |
2614 | SDHCI_INT_CARD_INSERT; | |
2615 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); | |
2616 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
41005003 RK |
2617 | |
2618 | sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT | | |
2619 | SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS); | |
3560db8e RK |
2620 | |
2621 | host->thread_isr |= intmask & (SDHCI_INT_CARD_INSERT | | |
2622 | SDHCI_INT_CARD_REMOVE); | |
2623 | result = IRQ_WAKE_THREAD; | |
41005003 | 2624 | } |
d129bceb | 2625 | |
41005003 | 2626 | if (intmask & SDHCI_INT_CMD_MASK) |
61541397 AH |
2627 | sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK, |
2628 | &intmask); | |
964f9ce2 | 2629 | |
41005003 RK |
2630 | if (intmask & SDHCI_INT_DATA_MASK) |
2631 | sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK); | |
d129bceb | 2632 | |
41005003 RK |
2633 | if (intmask & SDHCI_INT_BUS_POWER) |
2634 | pr_err("%s: Card is consuming too much power!\n", | |
2635 | mmc_hostname(host->mmc)); | |
3192a28f | 2636 | |
781e989c RK |
2637 | if (intmask & SDHCI_INT_CARD_INT) { |
2638 | sdhci_enable_sdio_irq_nolock(host, false); | |
2639 | host->thread_isr |= SDHCI_INT_CARD_INT; | |
2640 | result = IRQ_WAKE_THREAD; | |
2641 | } | |
f75979b7 | 2642 | |
41005003 RK |
2643 | intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE | |
2644 | SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK | | |
2645 | SDHCI_INT_ERROR | SDHCI_INT_BUS_POWER | | |
2646 | SDHCI_INT_CARD_INT); | |
f75979b7 | 2647 | |
41005003 RK |
2648 | if (intmask) { |
2649 | unexpected |= intmask; | |
2650 | sdhci_writel(host, intmask, SDHCI_INT_STATUS); | |
2651 | } | |
d129bceb | 2652 | |
781e989c RK |
2653 | if (result == IRQ_NONE) |
2654 | result = IRQ_HANDLED; | |
d129bceb | 2655 | |
41005003 | 2656 | intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
41005003 | 2657 | } while (intmask && --max_loops); |
d129bceb PO |
2658 | out: |
2659 | spin_unlock(&host->lock); | |
2660 | ||
6379b237 AS |
2661 | if (unexpected) { |
2662 | pr_err("%s: Unexpected interrupt 0x%08x.\n", | |
2663 | mmc_hostname(host->mmc), unexpected); | |
2664 | sdhci_dumpregs(host); | |
2665 | } | |
f75979b7 | 2666 | |
d129bceb PO |
2667 | return result; |
2668 | } | |
2669 | ||
781e989c RK |
2670 | static irqreturn_t sdhci_thread_irq(int irq, void *dev_id) |
2671 | { | |
2672 | struct sdhci_host *host = dev_id; | |
2673 | unsigned long flags; | |
2674 | u32 isr; | |
2675 | ||
2676 | spin_lock_irqsave(&host->lock, flags); | |
2677 | isr = host->thread_isr; | |
2678 | host->thread_isr = 0; | |
2679 | spin_unlock_irqrestore(&host->lock, flags); | |
2680 | ||
3560db8e RK |
2681 | if (isr & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { |
2682 | sdhci_card_event(host->mmc); | |
2683 | mmc_detect_change(host->mmc, msecs_to_jiffies(200)); | |
2684 | } | |
2685 | ||
781e989c RK |
2686 | if (isr & SDHCI_INT_CARD_INT) { |
2687 | sdio_run_irqs(host->mmc); | |
2688 | ||
2689 | spin_lock_irqsave(&host->lock, flags); | |
2690 | if (host->flags & SDHCI_SDIO_IRQ_ENABLED) | |
2691 | sdhci_enable_sdio_irq_nolock(host, true); | |
2692 | spin_unlock_irqrestore(&host->lock, flags); | |
2693 | } | |
2694 | ||
2695 | return isr ? IRQ_HANDLED : IRQ_NONE; | |
2696 | } | |
2697 | ||
d129bceb PO |
2698 | /*****************************************************************************\ |
2699 | * * | |
2700 | * Suspend/resume * | |
2701 | * * | |
2702 | \*****************************************************************************/ | |
2703 | ||
2704 | #ifdef CONFIG_PM | |
ad080d79 KL |
2705 | void sdhci_enable_irq_wakeups(struct sdhci_host *host) |
2706 | { | |
2707 | u8 val; | |
2708 | u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE | |
2709 | | SDHCI_WAKE_ON_INT; | |
2710 | ||
2711 | val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); | |
2712 | val |= mask ; | |
2713 | /* Avoid fake wake up */ | |
2714 | if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) | |
2715 | val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE); | |
2716 | sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); | |
2717 | } | |
2718 | EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups); | |
2719 | ||
0b10f478 | 2720 | static void sdhci_disable_irq_wakeups(struct sdhci_host *host) |
ad080d79 KL |
2721 | { |
2722 | u8 val; | |
2723 | u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE | |
2724 | | SDHCI_WAKE_ON_INT; | |
2725 | ||
2726 | val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); | |
2727 | val &= ~mask; | |
2728 | sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); | |
2729 | } | |
d129bceb | 2730 | |
29495aa0 | 2731 | int sdhci_suspend_host(struct sdhci_host *host) |
d129bceb | 2732 | { |
7260cf5e AV |
2733 | sdhci_disable_card_detection(host); |
2734 | ||
cf2b5eea | 2735 | /* Disable tuning since we are suspending */ |
973905fe | 2736 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
c6ced0db | 2737 | del_timer_sync(&host->tuning_timer); |
cf2b5eea | 2738 | host->flags &= ~SDHCI_NEEDS_RETUNING; |
cf2b5eea AN |
2739 | } |
2740 | ||
ad080d79 | 2741 | if (!device_may_wakeup(mmc_dev(host->mmc))) { |
b537f94c RK |
2742 | host->ier = 0; |
2743 | sdhci_writel(host, 0, SDHCI_INT_ENABLE); | |
2744 | sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); | |
ad080d79 KL |
2745 | free_irq(host->irq, host); |
2746 | } else { | |
2747 | sdhci_enable_irq_wakeups(host); | |
2748 | enable_irq_wake(host->irq); | |
2749 | } | |
4ee14ec6 | 2750 | return 0; |
d129bceb PO |
2751 | } |
2752 | ||
b8c86fc5 | 2753 | EXPORT_SYMBOL_GPL(sdhci_suspend_host); |
d129bceb | 2754 | |
b8c86fc5 PO |
2755 | int sdhci_resume_host(struct sdhci_host *host) |
2756 | { | |
4ee14ec6 | 2757 | int ret = 0; |
d129bceb | 2758 | |
a13abc7b | 2759 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
b8c86fc5 PO |
2760 | if (host->ops->enable_dma) |
2761 | host->ops->enable_dma(host); | |
2762 | } | |
d129bceb | 2763 | |
ad080d79 | 2764 | if (!device_may_wakeup(mmc_dev(host->mmc))) { |
781e989c RK |
2765 | ret = request_threaded_irq(host->irq, sdhci_irq, |
2766 | sdhci_thread_irq, IRQF_SHARED, | |
2767 | mmc_hostname(host->mmc), host); | |
ad080d79 KL |
2768 | if (ret) |
2769 | return ret; | |
2770 | } else { | |
2771 | sdhci_disable_irq_wakeups(host); | |
2772 | disable_irq_wake(host->irq); | |
2773 | } | |
d129bceb | 2774 | |
6308d290 AH |
2775 | if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) && |
2776 | (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) { | |
2777 | /* Card keeps power but host controller does not */ | |
2778 | sdhci_init(host, 0); | |
2779 | host->pwr = 0; | |
2780 | host->clock = 0; | |
2781 | sdhci_do_set_ios(host, &host->mmc->ios); | |
2782 | } else { | |
2783 | sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER)); | |
2784 | mmiowb(); | |
2785 | } | |
b8c86fc5 | 2786 | |
7260cf5e AV |
2787 | sdhci_enable_card_detection(host); |
2788 | ||
cf2b5eea | 2789 | /* Set the re-tuning expiration flag */ |
973905fe | 2790 | if (host->flags & SDHCI_USING_RETUNING_TIMER) |
cf2b5eea AN |
2791 | host->flags |= SDHCI_NEEDS_RETUNING; |
2792 | ||
2f4cbb3d | 2793 | return ret; |
d129bceb PO |
2794 | } |
2795 | ||
b8c86fc5 | 2796 | EXPORT_SYMBOL_GPL(sdhci_resume_host); |
66fd8ad5 AH |
2797 | |
2798 | static int sdhci_runtime_pm_get(struct sdhci_host *host) | |
2799 | { | |
2800 | return pm_runtime_get_sync(host->mmc->parent); | |
2801 | } | |
2802 | ||
2803 | static int sdhci_runtime_pm_put(struct sdhci_host *host) | |
2804 | { | |
2805 | pm_runtime_mark_last_busy(host->mmc->parent); | |
2806 | return pm_runtime_put_autosuspend(host->mmc->parent); | |
2807 | } | |
2808 | ||
f0710a55 AH |
2809 | static void sdhci_runtime_pm_bus_on(struct sdhci_host *host) |
2810 | { | |
2811 | if (host->runtime_suspended || host->bus_on) | |
2812 | return; | |
2813 | host->bus_on = true; | |
2814 | pm_runtime_get_noresume(host->mmc->parent); | |
2815 | } | |
2816 | ||
2817 | static void sdhci_runtime_pm_bus_off(struct sdhci_host *host) | |
2818 | { | |
2819 | if (host->runtime_suspended || !host->bus_on) | |
2820 | return; | |
2821 | host->bus_on = false; | |
2822 | pm_runtime_put_noidle(host->mmc->parent); | |
2823 | } | |
2824 | ||
66fd8ad5 AH |
2825 | int sdhci_runtime_suspend_host(struct sdhci_host *host) |
2826 | { | |
2827 | unsigned long flags; | |
66fd8ad5 AH |
2828 | |
2829 | /* Disable tuning since we are suspending */ | |
973905fe | 2830 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
66fd8ad5 AH |
2831 | del_timer_sync(&host->tuning_timer); |
2832 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
2833 | } | |
2834 | ||
2835 | spin_lock_irqsave(&host->lock, flags); | |
b537f94c RK |
2836 | host->ier &= SDHCI_INT_CARD_INT; |
2837 | sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); | |
2838 | sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); | |
66fd8ad5 AH |
2839 | spin_unlock_irqrestore(&host->lock, flags); |
2840 | ||
781e989c | 2841 | synchronize_hardirq(host->irq); |
66fd8ad5 AH |
2842 | |
2843 | spin_lock_irqsave(&host->lock, flags); | |
2844 | host->runtime_suspended = true; | |
2845 | spin_unlock_irqrestore(&host->lock, flags); | |
2846 | ||
8a125bad | 2847 | return 0; |
66fd8ad5 AH |
2848 | } |
2849 | EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host); | |
2850 | ||
2851 | int sdhci_runtime_resume_host(struct sdhci_host *host) | |
2852 | { | |
2853 | unsigned long flags; | |
8a125bad | 2854 | int host_flags = host->flags; |
66fd8ad5 AH |
2855 | |
2856 | if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { | |
2857 | if (host->ops->enable_dma) | |
2858 | host->ops->enable_dma(host); | |
2859 | } | |
2860 | ||
2861 | sdhci_init(host, 0); | |
2862 | ||
2863 | /* Force clock and power re-program */ | |
2864 | host->pwr = 0; | |
2865 | host->clock = 0; | |
2866 | sdhci_do_set_ios(host, &host->mmc->ios); | |
2867 | ||
2868 | sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios); | |
52983382 KL |
2869 | if ((host_flags & SDHCI_PV_ENABLED) && |
2870 | !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) { | |
2871 | spin_lock_irqsave(&host->lock, flags); | |
2872 | sdhci_enable_preset_value(host, true); | |
2873 | spin_unlock_irqrestore(&host->lock, flags); | |
2874 | } | |
66fd8ad5 AH |
2875 | |
2876 | /* Set the re-tuning expiration flag */ | |
973905fe | 2877 | if (host->flags & SDHCI_USING_RETUNING_TIMER) |
66fd8ad5 AH |
2878 | host->flags |= SDHCI_NEEDS_RETUNING; |
2879 | ||
2880 | spin_lock_irqsave(&host->lock, flags); | |
2881 | ||
2882 | host->runtime_suspended = false; | |
2883 | ||
2884 | /* Enable SDIO IRQ */ | |
ef104333 | 2885 | if (host->flags & SDHCI_SDIO_IRQ_ENABLED) |
66fd8ad5 AH |
2886 | sdhci_enable_sdio_irq_nolock(host, true); |
2887 | ||
2888 | /* Enable Card Detection */ | |
2889 | sdhci_enable_card_detection(host); | |
2890 | ||
2891 | spin_unlock_irqrestore(&host->lock, flags); | |
2892 | ||
8a125bad | 2893 | return 0; |
66fd8ad5 AH |
2894 | } |
2895 | EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host); | |
2896 | ||
162d6f98 | 2897 | #endif /* CONFIG_PM */ |
66fd8ad5 | 2898 | |
d129bceb PO |
2899 | /*****************************************************************************\ |
2900 | * * | |
b8c86fc5 | 2901 | * Device allocation/registration * |
d129bceb PO |
2902 | * * |
2903 | \*****************************************************************************/ | |
2904 | ||
b8c86fc5 PO |
2905 | struct sdhci_host *sdhci_alloc_host(struct device *dev, |
2906 | size_t priv_size) | |
d129bceb | 2907 | { |
d129bceb PO |
2908 | struct mmc_host *mmc; |
2909 | struct sdhci_host *host; | |
2910 | ||
b8c86fc5 | 2911 | WARN_ON(dev == NULL); |
d129bceb | 2912 | |
b8c86fc5 | 2913 | mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev); |
d129bceb | 2914 | if (!mmc) |
b8c86fc5 | 2915 | return ERR_PTR(-ENOMEM); |
d129bceb PO |
2916 | |
2917 | host = mmc_priv(mmc); | |
2918 | host->mmc = mmc; | |
2919 | ||
b8c86fc5 PO |
2920 | return host; |
2921 | } | |
8a4da143 | 2922 | |
b8c86fc5 | 2923 | EXPORT_SYMBOL_GPL(sdhci_alloc_host); |
d129bceb | 2924 | |
b8c86fc5 PO |
2925 | int sdhci_add_host(struct sdhci_host *host) |
2926 | { | |
2927 | struct mmc_host *mmc; | |
bd6a8c30 | 2928 | u32 caps[2] = {0, 0}; |
f2119df6 AN |
2929 | u32 max_current_caps; |
2930 | unsigned int ocr_avail; | |
f5fa92e5 | 2931 | unsigned int override_timeout_clk; |
b8c86fc5 | 2932 | int ret; |
d129bceb | 2933 | |
b8c86fc5 PO |
2934 | WARN_ON(host == NULL); |
2935 | if (host == NULL) | |
2936 | return -EINVAL; | |
d129bceb | 2937 | |
b8c86fc5 | 2938 | mmc = host->mmc; |
d129bceb | 2939 | |
b8c86fc5 PO |
2940 | if (debug_quirks) |
2941 | host->quirks = debug_quirks; | |
66fd8ad5 AH |
2942 | if (debug_quirks2) |
2943 | host->quirks2 = debug_quirks2; | |
d129bceb | 2944 | |
f5fa92e5 AH |
2945 | override_timeout_clk = host->timeout_clk; |
2946 | ||
03231f9b | 2947 | sdhci_do_reset(host, SDHCI_RESET_ALL); |
d96649ed | 2948 | |
4e4141a5 | 2949 | host->version = sdhci_readw(host, SDHCI_HOST_VERSION); |
2134a922 PO |
2950 | host->version = (host->version & SDHCI_SPEC_VER_MASK) |
2951 | >> SDHCI_SPEC_VER_SHIFT; | |
85105c53 | 2952 | if (host->version > SDHCI_SPEC_300) { |
a3c76eb9 | 2953 | pr_err("%s: Unknown controller version (%d). " |
b69c9058 | 2954 | "You may experience problems.\n", mmc_hostname(mmc), |
2134a922 | 2955 | host->version); |
4a965505 PO |
2956 | } |
2957 | ||
f2119df6 | 2958 | caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps : |
ccc92c23 | 2959 | sdhci_readl(host, SDHCI_CAPABILITIES); |
d129bceb | 2960 | |
bd6a8c30 PR |
2961 | if (host->version >= SDHCI_SPEC_300) |
2962 | caps[1] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? | |
2963 | host->caps1 : | |
2964 | sdhci_readl(host, SDHCI_CAPABILITIES_1); | |
f2119df6 | 2965 | |
b8c86fc5 | 2966 | if (host->quirks & SDHCI_QUIRK_FORCE_DMA) |
a13abc7b | 2967 | host->flags |= SDHCI_USE_SDMA; |
f2119df6 | 2968 | else if (!(caps[0] & SDHCI_CAN_DO_SDMA)) |
a13abc7b | 2969 | DBG("Controller doesn't have SDMA capability\n"); |
67435274 | 2970 | else |
a13abc7b | 2971 | host->flags |= SDHCI_USE_SDMA; |
d129bceb | 2972 | |
b8c86fc5 | 2973 | if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) && |
a13abc7b | 2974 | (host->flags & SDHCI_USE_SDMA)) { |
cee687ce | 2975 | DBG("Disabling DMA as it is marked broken\n"); |
a13abc7b | 2976 | host->flags &= ~SDHCI_USE_SDMA; |
7c168e3d FT |
2977 | } |
2978 | ||
f2119df6 AN |
2979 | if ((host->version >= SDHCI_SPEC_200) && |
2980 | (caps[0] & SDHCI_CAN_DO_ADMA2)) | |
a13abc7b | 2981 | host->flags |= SDHCI_USE_ADMA; |
2134a922 PO |
2982 | |
2983 | if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) && | |
2984 | (host->flags & SDHCI_USE_ADMA)) { | |
2985 | DBG("Disabling ADMA as it is marked broken\n"); | |
2986 | host->flags &= ~SDHCI_USE_ADMA; | |
2987 | } | |
2988 | ||
e57a5f61 AH |
2989 | /* |
2990 | * It is assumed that a 64-bit capable device has set a 64-bit DMA mask | |
2991 | * and *must* do 64-bit DMA. A driver has the opportunity to change | |
2992 | * that during the first call to ->enable_dma(). Similarly | |
2993 | * SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to | |
2994 | * implement. | |
2995 | */ | |
2996 | if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) | |
2997 | host->flags |= SDHCI_USE_64_BIT_DMA; | |
2998 | ||
a13abc7b | 2999 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
b8c86fc5 PO |
3000 | if (host->ops->enable_dma) { |
3001 | if (host->ops->enable_dma(host)) { | |
6606110d | 3002 | pr_warn("%s: No suitable DMA available - falling back to PIO\n", |
b8c86fc5 | 3003 | mmc_hostname(mmc)); |
a13abc7b RR |
3004 | host->flags &= |
3005 | ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA); | |
b8c86fc5 | 3006 | } |
d129bceb PO |
3007 | } |
3008 | } | |
3009 | ||
e57a5f61 AH |
3010 | /* SDMA does not support 64-bit DMA */ |
3011 | if (host->flags & SDHCI_USE_64_BIT_DMA) | |
3012 | host->flags &= ~SDHCI_USE_SDMA; | |
3013 | ||
2134a922 PO |
3014 | if (host->flags & SDHCI_USE_ADMA) { |
3015 | /* | |
76fe379a AH |
3016 | * The DMA descriptor table size is calculated as the maximum |
3017 | * number of segments times 2, to allow for an alignment | |
3018 | * descriptor for each segment, plus 1 for a nop end descriptor, | |
3019 | * all multipled by the descriptor size. | |
2134a922 | 3020 | */ |
e57a5f61 AH |
3021 | if (host->flags & SDHCI_USE_64_BIT_DMA) { |
3022 | host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * | |
3023 | SDHCI_ADMA2_64_DESC_SZ; | |
3024 | host->align_buffer_sz = SDHCI_MAX_SEGS * | |
3025 | SDHCI_ADMA2_64_ALIGN; | |
3026 | host->desc_sz = SDHCI_ADMA2_64_DESC_SZ; | |
3027 | host->align_sz = SDHCI_ADMA2_64_ALIGN; | |
3028 | host->align_mask = SDHCI_ADMA2_64_ALIGN - 1; | |
3029 | } else { | |
3030 | host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * | |
3031 | SDHCI_ADMA2_32_DESC_SZ; | |
3032 | host->align_buffer_sz = SDHCI_MAX_SEGS * | |
3033 | SDHCI_ADMA2_32_ALIGN; | |
3034 | host->desc_sz = SDHCI_ADMA2_32_DESC_SZ; | |
3035 | host->align_sz = SDHCI_ADMA2_32_ALIGN; | |
3036 | host->align_mask = SDHCI_ADMA2_32_ALIGN - 1; | |
3037 | } | |
4efaa6fb | 3038 | host->adma_table = dma_alloc_coherent(mmc_dev(mmc), |
76fe379a | 3039 | host->adma_table_sz, |
4efaa6fb AH |
3040 | &host->adma_addr, |
3041 | GFP_KERNEL); | |
76fe379a | 3042 | host->align_buffer = kmalloc(host->align_buffer_sz, GFP_KERNEL); |
4efaa6fb | 3043 | if (!host->adma_table || !host->align_buffer) { |
76fe379a | 3044 | dma_free_coherent(mmc_dev(mmc), host->adma_table_sz, |
4efaa6fb | 3045 | host->adma_table, host->adma_addr); |
2134a922 | 3046 | kfree(host->align_buffer); |
6606110d | 3047 | pr_warn("%s: Unable to allocate ADMA buffers - falling back to standard DMA\n", |
2134a922 PO |
3048 | mmc_hostname(mmc)); |
3049 | host->flags &= ~SDHCI_USE_ADMA; | |
4efaa6fb | 3050 | host->adma_table = NULL; |
d1e49f77 | 3051 | host->align_buffer = NULL; |
76fe379a | 3052 | } else if (host->adma_addr & host->align_mask) { |
6606110d JP |
3053 | pr_warn("%s: unable to allocate aligned ADMA descriptor\n", |
3054 | mmc_hostname(mmc)); | |
d1e49f77 | 3055 | host->flags &= ~SDHCI_USE_ADMA; |
76fe379a | 3056 | dma_free_coherent(mmc_dev(mmc), host->adma_table_sz, |
4efaa6fb | 3057 | host->adma_table, host->adma_addr); |
d1e49f77 | 3058 | kfree(host->align_buffer); |
4efaa6fb | 3059 | host->adma_table = NULL; |
d1e49f77 | 3060 | host->align_buffer = NULL; |
2134a922 PO |
3061 | } |
3062 | } | |
3063 | ||
7659150c PO |
3064 | /* |
3065 | * If we use DMA, then it's up to the caller to set the DMA | |
3066 | * mask, but PIO does not need the hw shim so we set a new | |
3067 | * mask here in that case. | |
3068 | */ | |
a13abc7b | 3069 | if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) { |
7659150c | 3070 | host->dma_mask = DMA_BIT_MASK(64); |
4e743f1f | 3071 | mmc_dev(mmc)->dma_mask = &host->dma_mask; |
7659150c | 3072 | } |
d129bceb | 3073 | |
c4687d5f | 3074 | if (host->version >= SDHCI_SPEC_300) |
f2119df6 | 3075 | host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK) |
c4687d5f ZG |
3076 | >> SDHCI_CLOCK_BASE_SHIFT; |
3077 | else | |
f2119df6 | 3078 | host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK) |
c4687d5f ZG |
3079 | >> SDHCI_CLOCK_BASE_SHIFT; |
3080 | ||
4240ff0a | 3081 | host->max_clk *= 1000000; |
f27f47ef AV |
3082 | if (host->max_clk == 0 || host->quirks & |
3083 | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) { | |
4240ff0a | 3084 | if (!host->ops->get_max_clock) { |
a3c76eb9 | 3085 | pr_err("%s: Hardware doesn't specify base clock " |
4240ff0a BD |
3086 | "frequency.\n", mmc_hostname(mmc)); |
3087 | return -ENODEV; | |
3088 | } | |
3089 | host->max_clk = host->ops->get_max_clock(host); | |
8ef1a143 | 3090 | } |
d129bceb | 3091 | |
348487cb | 3092 | host->next_data.cookie = 1; |
c3ed3877 AN |
3093 | /* |
3094 | * In case of Host Controller v3.00, find out whether clock | |
3095 | * multiplier is supported. | |
3096 | */ | |
3097 | host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >> | |
3098 | SDHCI_CLOCK_MUL_SHIFT; | |
3099 | ||
3100 | /* | |
3101 | * In case the value in Clock Multiplier is 0, then programmable | |
3102 | * clock mode is not supported, otherwise the actual clock | |
3103 | * multiplier is one more than the value of Clock Multiplier | |
3104 | * in the Capabilities Register. | |
3105 | */ | |
3106 | if (host->clk_mul) | |
3107 | host->clk_mul += 1; | |
3108 | ||
d129bceb PO |
3109 | /* |
3110 | * Set host parameters. | |
3111 | */ | |
3112 | mmc->ops = &sdhci_ops; | |
c3ed3877 | 3113 | mmc->f_max = host->max_clk; |
ce5f036b | 3114 | if (host->ops->get_min_clock) |
a9e58f25 | 3115 | mmc->f_min = host->ops->get_min_clock(host); |
c3ed3877 AN |
3116 | else if (host->version >= SDHCI_SPEC_300) { |
3117 | if (host->clk_mul) { | |
3118 | mmc->f_min = (host->max_clk * host->clk_mul) / 1024; | |
3119 | mmc->f_max = host->max_clk * host->clk_mul; | |
3120 | } else | |
3121 | mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300; | |
3122 | } else | |
0397526d | 3123 | mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200; |
15ec4461 | 3124 | |
28aab053 AD |
3125 | if (!(host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) { |
3126 | host->timeout_clk = (caps[0] & SDHCI_TIMEOUT_CLK_MASK) >> | |
3127 | SDHCI_TIMEOUT_CLK_SHIFT; | |
3128 | if (host->timeout_clk == 0) { | |
3129 | if (host->ops->get_timeout_clock) { | |
3130 | host->timeout_clk = | |
3131 | host->ops->get_timeout_clock(host); | |
3132 | } else { | |
3133 | pr_err("%s: Hardware doesn't specify timeout clock frequency.\n", | |
3134 | mmc_hostname(mmc)); | |
3135 | return -ENODEV; | |
3136 | } | |
272308ca | 3137 | } |
272308ca | 3138 | |
28aab053 AD |
3139 | if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT) |
3140 | host->timeout_clk *= 1000; | |
272308ca | 3141 | |
28aab053 | 3142 | mmc->max_busy_timeout = host->ops->get_max_timeout_count ? |
a6ff5aeb | 3143 | host->ops->get_max_timeout_count(host) : 1 << 27; |
28aab053 AD |
3144 | mmc->max_busy_timeout /= host->timeout_clk; |
3145 | } | |
58d1246d | 3146 | |
f5fa92e5 AH |
3147 | if (override_timeout_clk) |
3148 | host->timeout_clk = override_timeout_clk; | |
3149 | ||
e89d456f | 3150 | mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; |
781e989c | 3151 | mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD; |
e89d456f AW |
3152 | |
3153 | if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) | |
3154 | host->flags |= SDHCI_AUTO_CMD12; | |
5fe23c7f | 3155 | |
8edf6371 | 3156 | /* Auto-CMD23 stuff only works in ADMA or PIO. */ |
4f3d3e9b | 3157 | if ((host->version >= SDHCI_SPEC_300) && |
8edf6371 | 3158 | ((host->flags & SDHCI_USE_ADMA) || |
4f3d3e9b | 3159 | !(host->flags & SDHCI_USE_SDMA))) { |
8edf6371 AW |
3160 | host->flags |= SDHCI_AUTO_CMD23; |
3161 | DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc)); | |
3162 | } else { | |
3163 | DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc)); | |
3164 | } | |
3165 | ||
15ec4461 PR |
3166 | /* |
3167 | * A controller may support 8-bit width, but the board itself | |
3168 | * might not have the pins brought out. Boards that support | |
3169 | * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in | |
3170 | * their platform code before calling sdhci_add_host(), and we | |
3171 | * won't assume 8-bit width for hosts without that CAP. | |
3172 | */ | |
5fe23c7f | 3173 | if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) |
15ec4461 | 3174 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
d129bceb | 3175 | |
63ef5d8c JH |
3176 | if (host->quirks2 & SDHCI_QUIRK2_HOST_NO_CMD23) |
3177 | mmc->caps &= ~MMC_CAP_CMD23; | |
3178 | ||
f2119df6 | 3179 | if (caps[0] & SDHCI_CAN_DO_HISPD) |
a29e7e18 | 3180 | mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; |
cd9277c0 | 3181 | |
176d1ed4 | 3182 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) && |
4e743f1f | 3183 | !(mmc->caps & MMC_CAP_NONREMOVABLE)) |
68d1fb7e AV |
3184 | mmc->caps |= MMC_CAP_NEEDS_POLL; |
3185 | ||
3a48edc4 TK |
3186 | /* If there are external regulators, get them */ |
3187 | if (mmc_regulator_get_supply(mmc) == -EPROBE_DEFER) | |
3188 | return -EPROBE_DEFER; | |
3189 | ||
6231f3de | 3190 | /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */ |
3a48edc4 TK |
3191 | if (!IS_ERR(mmc->supply.vqmmc)) { |
3192 | ret = regulator_enable(mmc->supply.vqmmc); | |
3193 | if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000, | |
3194 | 1950000)) | |
8363c374 KL |
3195 | caps[1] &= ~(SDHCI_SUPPORT_SDR104 | |
3196 | SDHCI_SUPPORT_SDR50 | | |
3197 | SDHCI_SUPPORT_DDR50); | |
a3361aba CB |
3198 | if (ret) { |
3199 | pr_warn("%s: Failed to enable vqmmc regulator: %d\n", | |
3200 | mmc_hostname(mmc), ret); | |
4bb74313 | 3201 | mmc->supply.vqmmc = ERR_PTR(-EINVAL); |
a3361aba | 3202 | } |
8363c374 | 3203 | } |
6231f3de | 3204 | |
6a66180a DD |
3205 | if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) |
3206 | caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | | |
3207 | SDHCI_SUPPORT_DDR50); | |
3208 | ||
4188bba0 AC |
3209 | /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */ |
3210 | if (caps[1] & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | | |
3211 | SDHCI_SUPPORT_DDR50)) | |
f2119df6 AN |
3212 | mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25; |
3213 | ||
3214 | /* SDR104 supports also implies SDR50 support */ | |
156e14b1 | 3215 | if (caps[1] & SDHCI_SUPPORT_SDR104) { |
f2119df6 | 3216 | mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50; |
156e14b1 GC |
3217 | /* SD3.0: SDR104 is supported so (for eMMC) the caps2 |
3218 | * field can be promoted to support HS200. | |
3219 | */ | |
549c0b18 | 3220 | if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200)) |
13868bf2 | 3221 | mmc->caps2 |= MMC_CAP2_HS200; |
156e14b1 | 3222 | } else if (caps[1] & SDHCI_SUPPORT_SDR50) |
f2119df6 AN |
3223 | mmc->caps |= MMC_CAP_UHS_SDR50; |
3224 | ||
e9fb05d5 AH |
3225 | if (host->quirks2 & SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 && |
3226 | (caps[1] & SDHCI_SUPPORT_HS400)) | |
3227 | mmc->caps2 |= MMC_CAP2_HS400; | |
3228 | ||
549c0b18 AH |
3229 | if ((mmc->caps2 & MMC_CAP2_HSX00_1_2V) && |
3230 | (IS_ERR(mmc->supply.vqmmc) || | |
3231 | !regulator_is_supported_voltage(mmc->supply.vqmmc, 1100000, | |
3232 | 1300000))) | |
3233 | mmc->caps2 &= ~MMC_CAP2_HSX00_1_2V; | |
3234 | ||
9107ebbf MC |
3235 | if ((caps[1] & SDHCI_SUPPORT_DDR50) && |
3236 | !(host->quirks2 & SDHCI_QUIRK2_BROKEN_DDR50)) | |
f2119df6 AN |
3237 | mmc->caps |= MMC_CAP_UHS_DDR50; |
3238 | ||
069c9f14 | 3239 | /* Does the host need tuning for SDR50? */ |
b513ea25 AN |
3240 | if (caps[1] & SDHCI_USE_SDR50_TUNING) |
3241 | host->flags |= SDHCI_SDR50_NEEDS_TUNING; | |
3242 | ||
156e14b1 | 3243 | /* Does the host need tuning for SDR104 / HS200? */ |
069c9f14 | 3244 | if (mmc->caps2 & MMC_CAP2_HS200) |
156e14b1 | 3245 | host->flags |= SDHCI_SDR104_NEEDS_TUNING; |
069c9f14 | 3246 | |
d6d50a15 AN |
3247 | /* Driver Type(s) (A, C, D) supported by the host */ |
3248 | if (caps[1] & SDHCI_DRIVER_TYPE_A) | |
3249 | mmc->caps |= MMC_CAP_DRIVER_TYPE_A; | |
3250 | if (caps[1] & SDHCI_DRIVER_TYPE_C) | |
3251 | mmc->caps |= MMC_CAP_DRIVER_TYPE_C; | |
3252 | if (caps[1] & SDHCI_DRIVER_TYPE_D) | |
3253 | mmc->caps |= MMC_CAP_DRIVER_TYPE_D; | |
3254 | ||
cf2b5eea AN |
3255 | /* Initial value for re-tuning timer count */ |
3256 | host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> | |
3257 | SDHCI_RETUNING_TIMER_COUNT_SHIFT; | |
3258 | ||
3259 | /* | |
3260 | * In case Re-tuning Timer is not disabled, the actual value of | |
3261 | * re-tuning timer will be 2 ^ (n - 1). | |
3262 | */ | |
3263 | if (host->tuning_count) | |
3264 | host->tuning_count = 1 << (host->tuning_count - 1); | |
3265 | ||
3266 | /* Re-tuning mode supported by the Host Controller */ | |
3267 | host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >> | |
3268 | SDHCI_RETUNING_MODE_SHIFT; | |
3269 | ||
8f230f45 | 3270 | ocr_avail = 0; |
bad37e1a | 3271 | |
f2119df6 AN |
3272 | /* |
3273 | * According to SD Host Controller spec v3.00, if the Host System | |
3274 | * can afford more than 150mA, Host Driver should set XPC to 1. Also | |
3275 | * the value is meaningful only if Voltage Support in the Capabilities | |
3276 | * register is set. The actual current value is 4 times the register | |
3277 | * value. | |
3278 | */ | |
3279 | max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT); | |
3a48edc4 | 3280 | if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) { |
ae906037 | 3281 | int curr = regulator_get_current_limit(mmc->supply.vmmc); |
bad37e1a PR |
3282 | if (curr > 0) { |
3283 | ||
3284 | /* convert to SDHCI_MAX_CURRENT format */ | |
3285 | curr = curr/1000; /* convert to mA */ | |
3286 | curr = curr/SDHCI_MAX_CURRENT_MULTIPLIER; | |
3287 | ||
3288 | curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT); | |
3289 | max_current_caps = | |
3290 | (curr << SDHCI_MAX_CURRENT_330_SHIFT) | | |
3291 | (curr << SDHCI_MAX_CURRENT_300_SHIFT) | | |
3292 | (curr << SDHCI_MAX_CURRENT_180_SHIFT); | |
3293 | } | |
3294 | } | |
f2119df6 AN |
3295 | |
3296 | if (caps[0] & SDHCI_CAN_VDD_330) { | |
8f230f45 | 3297 | ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34; |
f2119df6 | 3298 | |
55c4665e | 3299 | mmc->max_current_330 = ((max_current_caps & |
f2119df6 AN |
3300 | SDHCI_MAX_CURRENT_330_MASK) >> |
3301 | SDHCI_MAX_CURRENT_330_SHIFT) * | |
3302 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
f2119df6 AN |
3303 | } |
3304 | if (caps[0] & SDHCI_CAN_VDD_300) { | |
8f230f45 | 3305 | ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31; |
f2119df6 | 3306 | |
55c4665e | 3307 | mmc->max_current_300 = ((max_current_caps & |
f2119df6 AN |
3308 | SDHCI_MAX_CURRENT_300_MASK) >> |
3309 | SDHCI_MAX_CURRENT_300_SHIFT) * | |
3310 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
f2119df6 AN |
3311 | } |
3312 | if (caps[0] & SDHCI_CAN_VDD_180) { | |
8f230f45 TI |
3313 | ocr_avail |= MMC_VDD_165_195; |
3314 | ||
55c4665e | 3315 | mmc->max_current_180 = ((max_current_caps & |
f2119df6 AN |
3316 | SDHCI_MAX_CURRENT_180_MASK) >> |
3317 | SDHCI_MAX_CURRENT_180_SHIFT) * | |
3318 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
f2119df6 AN |
3319 | } |
3320 | ||
52221610 | 3321 | /* If OCR set by external regulators, use it instead */ |
3a48edc4 | 3322 | if (mmc->ocr_avail) |
52221610 | 3323 | ocr_avail = mmc->ocr_avail; |
3a48edc4 | 3324 | |
c0b887b6 | 3325 | if (host->ocr_mask) |
3a48edc4 | 3326 | ocr_avail &= host->ocr_mask; |
c0b887b6 | 3327 | |
8f230f45 TI |
3328 | mmc->ocr_avail = ocr_avail; |
3329 | mmc->ocr_avail_sdio = ocr_avail; | |
3330 | if (host->ocr_avail_sdio) | |
3331 | mmc->ocr_avail_sdio &= host->ocr_avail_sdio; | |
3332 | mmc->ocr_avail_sd = ocr_avail; | |
3333 | if (host->ocr_avail_sd) | |
3334 | mmc->ocr_avail_sd &= host->ocr_avail_sd; | |
3335 | else /* normal SD controllers don't support 1.8V */ | |
3336 | mmc->ocr_avail_sd &= ~MMC_VDD_165_195; | |
3337 | mmc->ocr_avail_mmc = ocr_avail; | |
3338 | if (host->ocr_avail_mmc) | |
3339 | mmc->ocr_avail_mmc &= host->ocr_avail_mmc; | |
146ad66e PO |
3340 | |
3341 | if (mmc->ocr_avail == 0) { | |
a3c76eb9 | 3342 | pr_err("%s: Hardware doesn't report any " |
b69c9058 | 3343 | "support voltages.\n", mmc_hostname(mmc)); |
b8c86fc5 | 3344 | return -ENODEV; |
146ad66e PO |
3345 | } |
3346 | ||
d129bceb PO |
3347 | spin_lock_init(&host->lock); |
3348 | ||
3349 | /* | |
2134a922 PO |
3350 | * Maximum number of segments. Depends on if the hardware |
3351 | * can do scatter/gather or not. | |
d129bceb | 3352 | */ |
2134a922 | 3353 | if (host->flags & SDHCI_USE_ADMA) |
4fb213f8 | 3354 | mmc->max_segs = SDHCI_MAX_SEGS; |
a13abc7b | 3355 | else if (host->flags & SDHCI_USE_SDMA) |
a36274e0 | 3356 | mmc->max_segs = 1; |
2134a922 | 3357 | else /* PIO */ |
4fb213f8 | 3358 | mmc->max_segs = SDHCI_MAX_SEGS; |
d129bceb PO |
3359 | |
3360 | /* | |
ac00531d AH |
3361 | * Maximum number of sectors in one transfer. Limited by SDMA boundary |
3362 | * size (512KiB). Note some tuning modes impose a 4MiB limit, but this | |
3363 | * is less anyway. | |
d129bceb | 3364 | */ |
55db890a | 3365 | mmc->max_req_size = 524288; |
d129bceb PO |
3366 | |
3367 | /* | |
3368 | * Maximum segment size. Could be one segment with the maximum number | |
2134a922 PO |
3369 | * of bytes. When doing hardware scatter/gather, each entry cannot |
3370 | * be larger than 64 KiB though. | |
d129bceb | 3371 | */ |
30652aa3 OJ |
3372 | if (host->flags & SDHCI_USE_ADMA) { |
3373 | if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC) | |
3374 | mmc->max_seg_size = 65535; | |
3375 | else | |
3376 | mmc->max_seg_size = 65536; | |
3377 | } else { | |
2134a922 | 3378 | mmc->max_seg_size = mmc->max_req_size; |
30652aa3 | 3379 | } |
d129bceb | 3380 | |
fe4a3c7a PO |
3381 | /* |
3382 | * Maximum block size. This varies from controller to controller and | |
3383 | * is specified in the capabilities register. | |
3384 | */ | |
0633f654 AV |
3385 | if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) { |
3386 | mmc->max_blk_size = 2; | |
3387 | } else { | |
f2119df6 | 3388 | mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >> |
0633f654 AV |
3389 | SDHCI_MAX_BLOCK_SHIFT; |
3390 | if (mmc->max_blk_size >= 3) { | |
6606110d JP |
3391 | pr_warn("%s: Invalid maximum block size, assuming 512 bytes\n", |
3392 | mmc_hostname(mmc)); | |
0633f654 AV |
3393 | mmc->max_blk_size = 0; |
3394 | } | |
3395 | } | |
3396 | ||
3397 | mmc->max_blk_size = 512 << mmc->max_blk_size; | |
fe4a3c7a | 3398 | |
55db890a PO |
3399 | /* |
3400 | * Maximum block count. | |
3401 | */ | |
1388eefd | 3402 | mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; |
55db890a | 3403 | |
d129bceb PO |
3404 | /* |
3405 | * Init tasklets. | |
3406 | */ | |
d129bceb PO |
3407 | tasklet_init(&host->finish_tasklet, |
3408 | sdhci_tasklet_finish, (unsigned long)host); | |
3409 | ||
e4cad1b5 | 3410 | setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host); |
d129bceb | 3411 | |
250fb7b4 | 3412 | init_waitqueue_head(&host->buf_ready_int); |
b513ea25 | 3413 | |
250fb7b4 | 3414 | if (host->version >= SDHCI_SPEC_300) { |
cf2b5eea AN |
3415 | /* Initialize re-tuning timer */ |
3416 | init_timer(&host->tuning_timer); | |
3417 | host->tuning_timer.data = (unsigned long)host; | |
3418 | host->tuning_timer.function = sdhci_tuning_timer; | |
3419 | } | |
3420 | ||
2af502ca SG |
3421 | sdhci_init(host, 0); |
3422 | ||
781e989c RK |
3423 | ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq, |
3424 | IRQF_SHARED, mmc_hostname(mmc), host); | |
0fc81ee3 MB |
3425 | if (ret) { |
3426 | pr_err("%s: Failed to request IRQ %d: %d\n", | |
3427 | mmc_hostname(mmc), host->irq, ret); | |
8ef1a143 | 3428 | goto untasklet; |
0fc81ee3 | 3429 | } |
d129bceb | 3430 | |
d129bceb PO |
3431 | #ifdef CONFIG_MMC_DEBUG |
3432 | sdhci_dumpregs(host); | |
3433 | #endif | |
3434 | ||
f9134319 | 3435 | #ifdef SDHCI_USE_LEDS_CLASS |
5dbace0c HS |
3436 | snprintf(host->led_name, sizeof(host->led_name), |
3437 | "%s::", mmc_hostname(mmc)); | |
3438 | host->led.name = host->led_name; | |
2f730fec PO |
3439 | host->led.brightness = LED_OFF; |
3440 | host->led.default_trigger = mmc_hostname(mmc); | |
3441 | host->led.brightness_set = sdhci_led_control; | |
3442 | ||
b8c86fc5 | 3443 | ret = led_classdev_register(mmc_dev(mmc), &host->led); |
0fc81ee3 MB |
3444 | if (ret) { |
3445 | pr_err("%s: Failed to register LED device: %d\n", | |
3446 | mmc_hostname(mmc), ret); | |
2f730fec | 3447 | goto reset; |
0fc81ee3 | 3448 | } |
2f730fec PO |
3449 | #endif |
3450 | ||
5f25a66f PO |
3451 | mmiowb(); |
3452 | ||
d129bceb PO |
3453 | mmc_add_host(mmc); |
3454 | ||
a3c76eb9 | 3455 | pr_info("%s: SDHCI controller on %s [%s] using %s\n", |
d1b26863 | 3456 | mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)), |
e57a5f61 AH |
3457 | (host->flags & SDHCI_USE_ADMA) ? |
3458 | (host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" : | |
a13abc7b | 3459 | (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO"); |
d129bceb | 3460 | |
7260cf5e AV |
3461 | sdhci_enable_card_detection(host); |
3462 | ||
d129bceb PO |
3463 | return 0; |
3464 | ||
f9134319 | 3465 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec | 3466 | reset: |
03231f9b | 3467 | sdhci_do_reset(host, SDHCI_RESET_ALL); |
b537f94c RK |
3468 | sdhci_writel(host, 0, SDHCI_INT_ENABLE); |
3469 | sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); | |
2f730fec PO |
3470 | free_irq(host->irq, host); |
3471 | #endif | |
8ef1a143 | 3472 | untasklet: |
d129bceb | 3473 | tasklet_kill(&host->finish_tasklet); |
d129bceb PO |
3474 | |
3475 | return ret; | |
3476 | } | |
3477 | ||
b8c86fc5 | 3478 | EXPORT_SYMBOL_GPL(sdhci_add_host); |
d129bceb | 3479 | |
1e72859e | 3480 | void sdhci_remove_host(struct sdhci_host *host, int dead) |
b8c86fc5 | 3481 | { |
3a48edc4 | 3482 | struct mmc_host *mmc = host->mmc; |
1e72859e PO |
3483 | unsigned long flags; |
3484 | ||
3485 | if (dead) { | |
3486 | spin_lock_irqsave(&host->lock, flags); | |
3487 | ||
3488 | host->flags |= SDHCI_DEVICE_DEAD; | |
3489 | ||
3490 | if (host->mrq) { | |
a3c76eb9 | 3491 | pr_err("%s: Controller removed during " |
4e743f1f | 3492 | " transfer!\n", mmc_hostname(mmc)); |
1e72859e PO |
3493 | |
3494 | host->mrq->cmd->error = -ENOMEDIUM; | |
3495 | tasklet_schedule(&host->finish_tasklet); | |
3496 | } | |
3497 | ||
3498 | spin_unlock_irqrestore(&host->lock, flags); | |
3499 | } | |
3500 | ||
7260cf5e AV |
3501 | sdhci_disable_card_detection(host); |
3502 | ||
4e743f1f | 3503 | mmc_remove_host(mmc); |
d129bceb | 3504 | |
f9134319 | 3505 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
3506 | led_classdev_unregister(&host->led); |
3507 | #endif | |
3508 | ||
1e72859e | 3509 | if (!dead) |
03231f9b | 3510 | sdhci_do_reset(host, SDHCI_RESET_ALL); |
d129bceb | 3511 | |
b537f94c RK |
3512 | sdhci_writel(host, 0, SDHCI_INT_ENABLE); |
3513 | sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); | |
d129bceb PO |
3514 | free_irq(host->irq, host); |
3515 | ||
3516 | del_timer_sync(&host->timer); | |
3517 | ||
d129bceb | 3518 | tasklet_kill(&host->finish_tasklet); |
2134a922 | 3519 | |
3a48edc4 TK |
3520 | if (!IS_ERR(mmc->supply.vqmmc)) |
3521 | regulator_disable(mmc->supply.vqmmc); | |
6231f3de | 3522 | |
4efaa6fb | 3523 | if (host->adma_table) |
76fe379a | 3524 | dma_free_coherent(mmc_dev(mmc), host->adma_table_sz, |
4efaa6fb | 3525 | host->adma_table, host->adma_addr); |
2134a922 PO |
3526 | kfree(host->align_buffer); |
3527 | ||
4efaa6fb | 3528 | host->adma_table = NULL; |
2134a922 | 3529 | host->align_buffer = NULL; |
d129bceb PO |
3530 | } |
3531 | ||
b8c86fc5 | 3532 | EXPORT_SYMBOL_GPL(sdhci_remove_host); |
d129bceb | 3533 | |
b8c86fc5 | 3534 | void sdhci_free_host(struct sdhci_host *host) |
d129bceb | 3535 | { |
b8c86fc5 | 3536 | mmc_free_host(host->mmc); |
d129bceb PO |
3537 | } |
3538 | ||
b8c86fc5 | 3539 | EXPORT_SYMBOL_GPL(sdhci_free_host); |
d129bceb PO |
3540 | |
3541 | /*****************************************************************************\ | |
3542 | * * | |
3543 | * Driver init/exit * | |
3544 | * * | |
3545 | \*****************************************************************************/ | |
3546 | ||
3547 | static int __init sdhci_drv_init(void) | |
3548 | { | |
a3c76eb9 | 3549 | pr_info(DRIVER_NAME |
52fbf9c9 | 3550 | ": Secure Digital Host Controller Interface driver\n"); |
a3c76eb9 | 3551 | pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); |
d129bceb | 3552 | |
b8c86fc5 | 3553 | return 0; |
d129bceb PO |
3554 | } |
3555 | ||
3556 | static void __exit sdhci_drv_exit(void) | |
3557 | { | |
d129bceb PO |
3558 | } |
3559 | ||
3560 | module_init(sdhci_drv_init); | |
3561 | module_exit(sdhci_drv_exit); | |
3562 | ||
df673b22 | 3563 | module_param(debug_quirks, uint, 0444); |
66fd8ad5 | 3564 | module_param(debug_quirks2, uint, 0444); |
67435274 | 3565 | |
32710e8f | 3566 | MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>"); |
b8c86fc5 | 3567 | MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver"); |
d129bceb | 3568 | MODULE_LICENSE("GPL"); |
67435274 | 3569 | |
df673b22 | 3570 | MODULE_PARM_DESC(debug_quirks, "Force certain quirks."); |
66fd8ad5 | 3571 | MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks."); |