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 | ||
52 | static void sdhci_send_command(struct sdhci_host *, struct mmc_command *); | |
53 | static void sdhci_finish_command(struct sdhci_host *); | |
069c9f14 | 54 | static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode); |
cf2b5eea | 55 | static void sdhci_tuning_timer(unsigned long data); |
52983382 | 56 | static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable); |
d129bceb | 57 | |
66fd8ad5 AH |
58 | #ifdef CONFIG_PM_RUNTIME |
59 | static int sdhci_runtime_pm_get(struct sdhci_host *host); | |
60 | static int sdhci_runtime_pm_put(struct sdhci_host *host); | |
f0710a55 AH |
61 | static void sdhci_runtime_pm_bus_on(struct sdhci_host *host); |
62 | static void sdhci_runtime_pm_bus_off(struct sdhci_host *host); | |
66fd8ad5 AH |
63 | #else |
64 | static inline int sdhci_runtime_pm_get(struct sdhci_host *host) | |
65 | { | |
66 | return 0; | |
67 | } | |
68 | static inline int sdhci_runtime_pm_put(struct sdhci_host *host) | |
69 | { | |
70 | return 0; | |
71 | } | |
f0710a55 AH |
72 | static void sdhci_runtime_pm_bus_on(struct sdhci_host *host) |
73 | { | |
74 | } | |
75 | static void sdhci_runtime_pm_bus_off(struct sdhci_host *host) | |
76 | { | |
77 | } | |
66fd8ad5 AH |
78 | #endif |
79 | ||
d129bceb PO |
80 | static void sdhci_dumpregs(struct sdhci_host *host) |
81 | { | |
a3c76eb9 | 82 | pr_debug(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n", |
412ab659 | 83 | mmc_hostname(host->mmc)); |
d129bceb | 84 | |
a3c76eb9 | 85 | pr_debug(DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n", |
4e4141a5 AV |
86 | sdhci_readl(host, SDHCI_DMA_ADDRESS), |
87 | sdhci_readw(host, SDHCI_HOST_VERSION)); | |
a3c76eb9 | 88 | pr_debug(DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n", |
4e4141a5 AV |
89 | sdhci_readw(host, SDHCI_BLOCK_SIZE), |
90 | sdhci_readw(host, SDHCI_BLOCK_COUNT)); | |
a3c76eb9 | 91 | pr_debug(DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n", |
4e4141a5 AV |
92 | sdhci_readl(host, SDHCI_ARGUMENT), |
93 | sdhci_readw(host, SDHCI_TRANSFER_MODE)); | |
a3c76eb9 | 94 | pr_debug(DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n", |
4e4141a5 AV |
95 | sdhci_readl(host, SDHCI_PRESENT_STATE), |
96 | sdhci_readb(host, SDHCI_HOST_CONTROL)); | |
a3c76eb9 | 97 | pr_debug(DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n", |
4e4141a5 AV |
98 | sdhci_readb(host, SDHCI_POWER_CONTROL), |
99 | sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL)); | |
a3c76eb9 | 100 | pr_debug(DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", |
4e4141a5 AV |
101 | sdhci_readb(host, SDHCI_WAKE_UP_CONTROL), |
102 | sdhci_readw(host, SDHCI_CLOCK_CONTROL)); | |
a3c76eb9 | 103 | pr_debug(DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", |
4e4141a5 AV |
104 | sdhci_readb(host, SDHCI_TIMEOUT_CONTROL), |
105 | sdhci_readl(host, SDHCI_INT_STATUS)); | |
a3c76eb9 | 106 | pr_debug(DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n", |
4e4141a5 AV |
107 | sdhci_readl(host, SDHCI_INT_ENABLE), |
108 | sdhci_readl(host, SDHCI_SIGNAL_ENABLE)); | |
a3c76eb9 | 109 | pr_debug(DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n", |
4e4141a5 AV |
110 | sdhci_readw(host, SDHCI_ACMD12_ERR), |
111 | sdhci_readw(host, SDHCI_SLOT_INT_STATUS)); | |
a3c76eb9 | 112 | pr_debug(DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n", |
4e4141a5 | 113 | sdhci_readl(host, SDHCI_CAPABILITIES), |
e8120ad1 | 114 | sdhci_readl(host, SDHCI_CAPABILITIES_1)); |
a3c76eb9 | 115 | pr_debug(DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n", |
e8120ad1 | 116 | sdhci_readw(host, SDHCI_COMMAND), |
4e4141a5 | 117 | sdhci_readl(host, SDHCI_MAX_CURRENT)); |
a3c76eb9 | 118 | pr_debug(DRIVER_NAME ": Host ctl2: 0x%08x\n", |
f2119df6 | 119 | sdhci_readw(host, SDHCI_HOST_CONTROL2)); |
d129bceb | 120 | |
be3f4ae0 | 121 | if (host->flags & SDHCI_USE_ADMA) |
a3c76eb9 | 122 | pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n", |
be3f4ae0 BD |
123 | readl(host->ioaddr + SDHCI_ADMA_ERROR), |
124 | readl(host->ioaddr + SDHCI_ADMA_ADDRESS)); | |
125 | ||
a3c76eb9 | 126 | pr_debug(DRIVER_NAME ": ===========================================\n"); |
d129bceb PO |
127 | } |
128 | ||
129 | /*****************************************************************************\ | |
130 | * * | |
131 | * Low level functions * | |
132 | * * | |
133 | \*****************************************************************************/ | |
134 | ||
7260cf5e AV |
135 | static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) |
136 | { | |
137 | u32 ier; | |
138 | ||
139 | ier = sdhci_readl(host, SDHCI_INT_ENABLE); | |
140 | ier &= ~clear; | |
141 | ier |= set; | |
142 | sdhci_writel(host, ier, SDHCI_INT_ENABLE); | |
143 | sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); | |
144 | } | |
145 | ||
146 | static void sdhci_unmask_irqs(struct sdhci_host *host, u32 irqs) | |
147 | { | |
148 | sdhci_clear_set_irqs(host, 0, irqs); | |
149 | } | |
150 | ||
151 | static void sdhci_mask_irqs(struct sdhci_host *host, u32 irqs) | |
152 | { | |
153 | sdhci_clear_set_irqs(host, irqs, 0); | |
154 | } | |
155 | ||
156 | static void sdhci_set_card_detection(struct sdhci_host *host, bool enable) | |
157 | { | |
d25928d1 | 158 | u32 present, irqs; |
7260cf5e | 159 | |
c79396c1 | 160 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || |
87b87a3f | 161 | (host->mmc->caps & MMC_CAP_NONREMOVABLE)) |
66fd8ad5 AH |
162 | return; |
163 | ||
d25928d1 SG |
164 | present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
165 | SDHCI_CARD_PRESENT; | |
166 | irqs = present ? SDHCI_INT_CARD_REMOVE : SDHCI_INT_CARD_INSERT; | |
167 | ||
7260cf5e AV |
168 | if (enable) |
169 | sdhci_unmask_irqs(host, irqs); | |
170 | else | |
171 | sdhci_mask_irqs(host, irqs); | |
172 | } | |
173 | ||
174 | static void sdhci_enable_card_detection(struct sdhci_host *host) | |
175 | { | |
176 | sdhci_set_card_detection(host, true); | |
177 | } | |
178 | ||
179 | static void sdhci_disable_card_detection(struct sdhci_host *host) | |
180 | { | |
181 | sdhci_set_card_detection(host, false); | |
182 | } | |
183 | ||
d129bceb PO |
184 | static void sdhci_reset(struct sdhci_host *host, u8 mask) |
185 | { | |
e16514d8 | 186 | unsigned long timeout; |
063a9dbb | 187 | u32 uninitialized_var(ier); |
e16514d8 | 188 | |
b8c86fc5 | 189 | if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { |
4e4141a5 | 190 | if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & |
8a4da143 PO |
191 | SDHCI_CARD_PRESENT)) |
192 | return; | |
193 | } | |
194 | ||
063a9dbb AV |
195 | if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) |
196 | ier = sdhci_readl(host, SDHCI_INT_ENABLE); | |
197 | ||
393c1a34 PR |
198 | if (host->ops->platform_reset_enter) |
199 | host->ops->platform_reset_enter(host, mask); | |
200 | ||
4e4141a5 | 201 | sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); |
d129bceb | 202 | |
f0710a55 | 203 | if (mask & SDHCI_RESET_ALL) { |
d129bceb | 204 | host->clock = 0; |
f0710a55 AH |
205 | /* Reset-all turns off SD Bus Power */ |
206 | if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) | |
207 | sdhci_runtime_pm_bus_off(host); | |
208 | } | |
d129bceb | 209 | |
e16514d8 PO |
210 | /* Wait max 100 ms */ |
211 | timeout = 100; | |
212 | ||
213 | /* hw clears the bit when it's done */ | |
4e4141a5 | 214 | while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) { |
e16514d8 | 215 | if (timeout == 0) { |
a3c76eb9 | 216 | pr_err("%s: Reset 0x%x never completed.\n", |
e16514d8 PO |
217 | mmc_hostname(host->mmc), (int)mask); |
218 | sdhci_dumpregs(host); | |
219 | return; | |
220 | } | |
221 | timeout--; | |
222 | mdelay(1); | |
d129bceb | 223 | } |
063a9dbb | 224 | |
393c1a34 PR |
225 | if (host->ops->platform_reset_exit) |
226 | host->ops->platform_reset_exit(host, mask); | |
227 | ||
063a9dbb AV |
228 | if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) |
229 | sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier); | |
3abc1e80 SX |
230 | |
231 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { | |
232 | if ((host->ops->enable_dma) && (mask & SDHCI_RESET_ALL)) | |
233 | host->ops->enable_dma(host); | |
234 | } | |
d129bceb PO |
235 | } |
236 | ||
2f4cbb3d NP |
237 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); |
238 | ||
239 | static void sdhci_init(struct sdhci_host *host, int soft) | |
d129bceb | 240 | { |
2f4cbb3d NP |
241 | if (soft) |
242 | sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA); | |
243 | else | |
244 | sdhci_reset(host, SDHCI_RESET_ALL); | |
d129bceb | 245 | |
7260cf5e AV |
246 | sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, |
247 | SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | | |
3192a28f PO |
248 | SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | |
249 | SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | | |
6aa943ab | 250 | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE); |
2f4cbb3d NP |
251 | |
252 | if (soft) { | |
253 | /* force clock reconfiguration */ | |
254 | host->clock = 0; | |
255 | sdhci_set_ios(host->mmc, &host->mmc->ios); | |
256 | } | |
7260cf5e | 257 | } |
d129bceb | 258 | |
7260cf5e AV |
259 | static void sdhci_reinit(struct sdhci_host *host) |
260 | { | |
2f4cbb3d | 261 | sdhci_init(host, 0); |
b67c6b41 AL |
262 | /* |
263 | * Retuning stuffs are affected by different cards inserted and only | |
264 | * applicable to UHS-I cards. So reset these fields to their initial | |
265 | * value when card is removed. | |
266 | */ | |
973905fe AL |
267 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
268 | host->flags &= ~SDHCI_USING_RETUNING_TIMER; | |
269 | ||
b67c6b41 AL |
270 | del_timer_sync(&host->tuning_timer); |
271 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
272 | host->mmc->max_blk_count = | |
273 | (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; | |
274 | } | |
7260cf5e | 275 | sdhci_enable_card_detection(host); |
d129bceb PO |
276 | } |
277 | ||
278 | static void sdhci_activate_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 | ||
287 | static void sdhci_deactivate_led(struct sdhci_host *host) | |
288 | { | |
289 | u8 ctrl; | |
290 | ||
4e4141a5 | 291 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
d129bceb | 292 | ctrl &= ~SDHCI_CTRL_LED; |
4e4141a5 | 293 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d129bceb PO |
294 | } |
295 | ||
f9134319 | 296 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
297 | static void sdhci_led_control(struct led_classdev *led, |
298 | enum led_brightness brightness) | |
299 | { | |
300 | struct sdhci_host *host = container_of(led, struct sdhci_host, led); | |
301 | unsigned long flags; | |
302 | ||
303 | spin_lock_irqsave(&host->lock, flags); | |
304 | ||
66fd8ad5 AH |
305 | if (host->runtime_suspended) |
306 | goto out; | |
307 | ||
2f730fec PO |
308 | if (brightness == LED_OFF) |
309 | sdhci_deactivate_led(host); | |
310 | else | |
311 | sdhci_activate_led(host); | |
66fd8ad5 | 312 | out: |
2f730fec PO |
313 | spin_unlock_irqrestore(&host->lock, flags); |
314 | } | |
315 | #endif | |
316 | ||
d129bceb PO |
317 | /*****************************************************************************\ |
318 | * * | |
319 | * Core functions * | |
320 | * * | |
321 | \*****************************************************************************/ | |
322 | ||
a406f5a3 | 323 | static void sdhci_read_block_pio(struct sdhci_host *host) |
d129bceb | 324 | { |
7659150c PO |
325 | unsigned long flags; |
326 | size_t blksize, len, chunk; | |
7244b85b | 327 | u32 uninitialized_var(scratch); |
7659150c | 328 | u8 *buf; |
d129bceb | 329 | |
a406f5a3 | 330 | DBG("PIO reading\n"); |
d129bceb | 331 | |
a406f5a3 | 332 | blksize = host->data->blksz; |
7659150c | 333 | chunk = 0; |
d129bceb | 334 | |
7659150c | 335 | local_irq_save(flags); |
d129bceb | 336 | |
a406f5a3 | 337 | while (blksize) { |
7659150c PO |
338 | if (!sg_miter_next(&host->sg_miter)) |
339 | BUG(); | |
d129bceb | 340 | |
7659150c | 341 | len = min(host->sg_miter.length, blksize); |
d129bceb | 342 | |
7659150c PO |
343 | blksize -= len; |
344 | host->sg_miter.consumed = len; | |
14d836e7 | 345 | |
7659150c | 346 | buf = host->sg_miter.addr; |
d129bceb | 347 | |
7659150c PO |
348 | while (len) { |
349 | if (chunk == 0) { | |
4e4141a5 | 350 | scratch = sdhci_readl(host, SDHCI_BUFFER); |
7659150c | 351 | chunk = 4; |
a406f5a3 | 352 | } |
7659150c PO |
353 | |
354 | *buf = scratch & 0xFF; | |
355 | ||
356 | buf++; | |
357 | scratch >>= 8; | |
358 | chunk--; | |
359 | len--; | |
d129bceb | 360 | } |
a406f5a3 | 361 | } |
7659150c PO |
362 | |
363 | sg_miter_stop(&host->sg_miter); | |
364 | ||
365 | local_irq_restore(flags); | |
a406f5a3 | 366 | } |
d129bceb | 367 | |
a406f5a3 PO |
368 | static void sdhci_write_block_pio(struct sdhci_host *host) |
369 | { | |
7659150c PO |
370 | unsigned long flags; |
371 | size_t blksize, len, chunk; | |
372 | u32 scratch; | |
373 | u8 *buf; | |
d129bceb | 374 | |
a406f5a3 PO |
375 | DBG("PIO writing\n"); |
376 | ||
377 | blksize = host->data->blksz; | |
7659150c PO |
378 | chunk = 0; |
379 | scratch = 0; | |
d129bceb | 380 | |
7659150c | 381 | local_irq_save(flags); |
d129bceb | 382 | |
a406f5a3 | 383 | while (blksize) { |
7659150c PO |
384 | if (!sg_miter_next(&host->sg_miter)) |
385 | BUG(); | |
a406f5a3 | 386 | |
7659150c PO |
387 | len = min(host->sg_miter.length, blksize); |
388 | ||
389 | blksize -= len; | |
390 | host->sg_miter.consumed = len; | |
391 | ||
392 | buf = host->sg_miter.addr; | |
d129bceb | 393 | |
7659150c PO |
394 | while (len) { |
395 | scratch |= (u32)*buf << (chunk * 8); | |
396 | ||
397 | buf++; | |
398 | chunk++; | |
399 | len--; | |
400 | ||
401 | if ((chunk == 4) || ((len == 0) && (blksize == 0))) { | |
4e4141a5 | 402 | sdhci_writel(host, scratch, SDHCI_BUFFER); |
7659150c PO |
403 | chunk = 0; |
404 | scratch = 0; | |
d129bceb | 405 | } |
d129bceb PO |
406 | } |
407 | } | |
7659150c PO |
408 | |
409 | sg_miter_stop(&host->sg_miter); | |
410 | ||
411 | local_irq_restore(flags); | |
a406f5a3 PO |
412 | } |
413 | ||
414 | static void sdhci_transfer_pio(struct sdhci_host *host) | |
415 | { | |
416 | u32 mask; | |
417 | ||
418 | BUG_ON(!host->data); | |
419 | ||
7659150c | 420 | if (host->blocks == 0) |
a406f5a3 PO |
421 | return; |
422 | ||
423 | if (host->data->flags & MMC_DATA_READ) | |
424 | mask = SDHCI_DATA_AVAILABLE; | |
425 | else | |
426 | mask = SDHCI_SPACE_AVAILABLE; | |
427 | ||
4a3cba32 PO |
428 | /* |
429 | * Some controllers (JMicron JMB38x) mess up the buffer bits | |
430 | * for transfers < 4 bytes. As long as it is just one block, | |
431 | * we can ignore the bits. | |
432 | */ | |
433 | if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) && | |
434 | (host->data->blocks == 1)) | |
435 | mask = ~0; | |
436 | ||
4e4141a5 | 437 | while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
3e3bf207 AV |
438 | if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY) |
439 | udelay(100); | |
440 | ||
a406f5a3 PO |
441 | if (host->data->flags & MMC_DATA_READ) |
442 | sdhci_read_block_pio(host); | |
443 | else | |
444 | sdhci_write_block_pio(host); | |
d129bceb | 445 | |
7659150c PO |
446 | host->blocks--; |
447 | if (host->blocks == 0) | |
a406f5a3 | 448 | break; |
a406f5a3 | 449 | } |
d129bceb | 450 | |
a406f5a3 | 451 | DBG("PIO transfer complete.\n"); |
d129bceb PO |
452 | } |
453 | ||
2134a922 PO |
454 | static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags) |
455 | { | |
456 | local_irq_save(*flags); | |
482fce99 | 457 | return kmap_atomic(sg_page(sg)) + sg->offset; |
2134a922 PO |
458 | } |
459 | ||
460 | static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) | |
461 | { | |
482fce99 | 462 | kunmap_atomic(buffer); |
2134a922 PO |
463 | local_irq_restore(*flags); |
464 | } | |
465 | ||
118cd17d BD |
466 | static void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd) |
467 | { | |
9e506f35 BD |
468 | __le32 *dataddr = (__le32 __force *)(desc + 4); |
469 | __le16 *cmdlen = (__le16 __force *)desc; | |
118cd17d | 470 | |
9e506f35 BD |
471 | /* SDHCI specification says ADMA descriptors should be 4 byte |
472 | * aligned, so using 16 or 32bit operations should be safe. */ | |
118cd17d | 473 | |
9e506f35 BD |
474 | cmdlen[0] = cpu_to_le16(cmd); |
475 | cmdlen[1] = cpu_to_le16(len); | |
476 | ||
477 | dataddr[0] = cpu_to_le32(addr); | |
118cd17d BD |
478 | } |
479 | ||
8f1934ce | 480 | static int sdhci_adma_table_pre(struct sdhci_host *host, |
2134a922 PO |
481 | struct mmc_data *data) |
482 | { | |
483 | int direction; | |
484 | ||
485 | u8 *desc; | |
486 | u8 *align; | |
487 | dma_addr_t addr; | |
488 | dma_addr_t align_addr; | |
489 | int len, offset; | |
490 | ||
491 | struct scatterlist *sg; | |
492 | int i; | |
493 | char *buffer; | |
494 | unsigned long flags; | |
495 | ||
496 | /* | |
497 | * The spec does not specify endianness of descriptor table. | |
498 | * We currently guess that it is LE. | |
499 | */ | |
500 | ||
501 | if (data->flags & MMC_DATA_READ) | |
502 | direction = DMA_FROM_DEVICE; | |
503 | else | |
504 | direction = DMA_TO_DEVICE; | |
505 | ||
506 | /* | |
507 | * The ADMA descriptor table is mapped further down as we | |
508 | * need to fill it with data first. | |
509 | */ | |
510 | ||
511 | host->align_addr = dma_map_single(mmc_dev(host->mmc), | |
512 | host->align_buffer, 128 * 4, direction); | |
8d8bb39b | 513 | if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr)) |
8f1934ce | 514 | goto fail; |
2134a922 PO |
515 | BUG_ON(host->align_addr & 0x3); |
516 | ||
517 | host->sg_count = dma_map_sg(mmc_dev(host->mmc), | |
518 | data->sg, data->sg_len, direction); | |
8f1934ce PO |
519 | if (host->sg_count == 0) |
520 | goto unmap_align; | |
2134a922 PO |
521 | |
522 | desc = host->adma_desc; | |
523 | align = host->align_buffer; | |
524 | ||
525 | align_addr = host->align_addr; | |
526 | ||
527 | for_each_sg(data->sg, sg, host->sg_count, i) { | |
528 | addr = sg_dma_address(sg); | |
529 | len = sg_dma_len(sg); | |
530 | ||
531 | /* | |
532 | * The SDHCI specification states that ADMA | |
533 | * addresses must be 32-bit aligned. If they | |
534 | * aren't, then we use a bounce buffer for | |
535 | * the (up to three) bytes that screw up the | |
536 | * alignment. | |
537 | */ | |
538 | offset = (4 - (addr & 0x3)) & 0x3; | |
539 | if (offset) { | |
540 | if (data->flags & MMC_DATA_WRITE) { | |
541 | buffer = sdhci_kmap_atomic(sg, &flags); | |
6cefd05f | 542 | WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); |
2134a922 PO |
543 | memcpy(align, buffer, offset); |
544 | sdhci_kunmap_atomic(buffer, &flags); | |
545 | } | |
546 | ||
118cd17d BD |
547 | /* tran, valid */ |
548 | sdhci_set_adma_desc(desc, align_addr, offset, 0x21); | |
2134a922 PO |
549 | |
550 | BUG_ON(offset > 65536); | |
551 | ||
2134a922 PO |
552 | align += 4; |
553 | align_addr += 4; | |
554 | ||
555 | desc += 8; | |
556 | ||
557 | addr += offset; | |
558 | len -= offset; | |
559 | } | |
560 | ||
2134a922 PO |
561 | BUG_ON(len > 65536); |
562 | ||
118cd17d BD |
563 | /* tran, valid */ |
564 | sdhci_set_adma_desc(desc, addr, len, 0x21); | |
2134a922 PO |
565 | desc += 8; |
566 | ||
567 | /* | |
568 | * If this triggers then we have a calculation bug | |
569 | * somewhere. :/ | |
570 | */ | |
571 | WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4); | |
572 | } | |
573 | ||
70764a90 TA |
574 | if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) { |
575 | /* | |
576 | * Mark the last descriptor as the terminating descriptor | |
577 | */ | |
578 | if (desc != host->adma_desc) { | |
579 | desc -= 8; | |
580 | desc[0] |= 0x2; /* end */ | |
581 | } | |
582 | } else { | |
583 | /* | |
584 | * Add a terminating entry. | |
585 | */ | |
2134a922 | 586 | |
70764a90 TA |
587 | /* nop, end, valid */ |
588 | sdhci_set_adma_desc(desc, 0, 0, 0x3); | |
589 | } | |
2134a922 PO |
590 | |
591 | /* | |
592 | * Resync align buffer as we might have changed it. | |
593 | */ | |
594 | if (data->flags & MMC_DATA_WRITE) { | |
595 | dma_sync_single_for_device(mmc_dev(host->mmc), | |
596 | host->align_addr, 128 * 4, direction); | |
597 | } | |
598 | ||
599 | host->adma_addr = dma_map_single(mmc_dev(host->mmc), | |
600 | host->adma_desc, (128 * 2 + 1) * 4, DMA_TO_DEVICE); | |
980167b7 | 601 | if (dma_mapping_error(mmc_dev(host->mmc), host->adma_addr)) |
8f1934ce | 602 | goto unmap_entries; |
2134a922 | 603 | BUG_ON(host->adma_addr & 0x3); |
8f1934ce PO |
604 | |
605 | return 0; | |
606 | ||
607 | unmap_entries: | |
608 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
609 | data->sg_len, direction); | |
610 | unmap_align: | |
611 | dma_unmap_single(mmc_dev(host->mmc), host->align_addr, | |
612 | 128 * 4, direction); | |
613 | fail: | |
614 | return -EINVAL; | |
2134a922 PO |
615 | } |
616 | ||
617 | static void sdhci_adma_table_post(struct sdhci_host *host, | |
618 | struct mmc_data *data) | |
619 | { | |
620 | int direction; | |
621 | ||
622 | struct scatterlist *sg; | |
623 | int i, size; | |
624 | u8 *align; | |
625 | char *buffer; | |
626 | unsigned long flags; | |
627 | ||
628 | if (data->flags & MMC_DATA_READ) | |
629 | direction = DMA_FROM_DEVICE; | |
630 | else | |
631 | direction = DMA_TO_DEVICE; | |
632 | ||
633 | dma_unmap_single(mmc_dev(host->mmc), host->adma_addr, | |
634 | (128 * 2 + 1) * 4, DMA_TO_DEVICE); | |
635 | ||
636 | dma_unmap_single(mmc_dev(host->mmc), host->align_addr, | |
637 | 128 * 4, direction); | |
638 | ||
639 | if (data->flags & MMC_DATA_READ) { | |
640 | dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, | |
641 | data->sg_len, direction); | |
642 | ||
643 | align = host->align_buffer; | |
644 | ||
645 | for_each_sg(data->sg, sg, host->sg_count, i) { | |
646 | if (sg_dma_address(sg) & 0x3) { | |
647 | size = 4 - (sg_dma_address(sg) & 0x3); | |
648 | ||
649 | buffer = sdhci_kmap_atomic(sg, &flags); | |
6cefd05f | 650 | WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); |
2134a922 PO |
651 | memcpy(buffer, align, size); |
652 | sdhci_kunmap_atomic(buffer, &flags); | |
653 | ||
654 | align += 4; | |
655 | } | |
656 | } | |
657 | } | |
658 | ||
659 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
660 | data->sg_len, direction); | |
661 | } | |
662 | ||
a3c7778f | 663 | static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd) |
d129bceb | 664 | { |
1c8cde92 | 665 | u8 count; |
a3c7778f | 666 | struct mmc_data *data = cmd->data; |
1c8cde92 | 667 | unsigned target_timeout, current_timeout; |
d129bceb | 668 | |
ee53ab5d PO |
669 | /* |
670 | * If the host controller provides us with an incorrect timeout | |
671 | * value, just skip the check and use 0xE. The hardware may take | |
672 | * longer to time out, but that's much better than having a too-short | |
673 | * timeout value. | |
674 | */ | |
11a2f1b7 | 675 | if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) |
ee53ab5d | 676 | return 0xE; |
e538fbe8 | 677 | |
a3c7778f AW |
678 | /* Unspecified timeout, assume max */ |
679 | if (!data && !cmd->cmd_timeout_ms) | |
680 | return 0xE; | |
d129bceb | 681 | |
a3c7778f AW |
682 | /* timeout in us */ |
683 | if (!data) | |
684 | target_timeout = cmd->cmd_timeout_ms * 1000; | |
78a2ca27 AS |
685 | else { |
686 | target_timeout = data->timeout_ns / 1000; | |
687 | if (host->clock) | |
688 | target_timeout += data->timeout_clks / host->clock; | |
689 | } | |
81b39802 | 690 | |
1c8cde92 PO |
691 | /* |
692 | * Figure out needed cycles. | |
693 | * We do this in steps in order to fit inside a 32 bit int. | |
694 | * The first step is the minimum timeout, which will have a | |
695 | * minimum resolution of 6 bits: | |
696 | * (1) 2^13*1000 > 2^22, | |
697 | * (2) host->timeout_clk < 2^16 | |
698 | * => | |
699 | * (1) / (2) > 2^6 | |
700 | */ | |
701 | count = 0; | |
702 | current_timeout = (1 << 13) * 1000 / host->timeout_clk; | |
703 | while (current_timeout < target_timeout) { | |
704 | count++; | |
705 | current_timeout <<= 1; | |
706 | if (count >= 0xF) | |
707 | break; | |
708 | } | |
709 | ||
710 | if (count >= 0xF) { | |
09eeff52 CB |
711 | DBG("%s: Too large timeout 0x%x requested for CMD%d!\n", |
712 | mmc_hostname(host->mmc), count, cmd->opcode); | |
1c8cde92 PO |
713 | count = 0xE; |
714 | } | |
715 | ||
ee53ab5d PO |
716 | return count; |
717 | } | |
718 | ||
6aa943ab AV |
719 | static void sdhci_set_transfer_irqs(struct sdhci_host *host) |
720 | { | |
721 | u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL; | |
722 | u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR; | |
723 | ||
724 | if (host->flags & SDHCI_REQ_USE_DMA) | |
725 | sdhci_clear_set_irqs(host, pio_irqs, dma_irqs); | |
726 | else | |
727 | sdhci_clear_set_irqs(host, dma_irqs, pio_irqs); | |
728 | } | |
729 | ||
a3c7778f | 730 | static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) |
ee53ab5d PO |
731 | { |
732 | u8 count; | |
2134a922 | 733 | u8 ctrl; |
a3c7778f | 734 | struct mmc_data *data = cmd->data; |
8f1934ce | 735 | int ret; |
ee53ab5d PO |
736 | |
737 | WARN_ON(host->data); | |
738 | ||
a3c7778f AW |
739 | if (data || (cmd->flags & MMC_RSP_BUSY)) { |
740 | count = sdhci_calc_timeout(host, cmd); | |
741 | sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); | |
742 | } | |
743 | ||
744 | if (!data) | |
ee53ab5d PO |
745 | return; |
746 | ||
747 | /* Sanity checks */ | |
748 | BUG_ON(data->blksz * data->blocks > 524288); | |
749 | BUG_ON(data->blksz > host->mmc->max_blk_size); | |
750 | BUG_ON(data->blocks > 65535); | |
751 | ||
752 | host->data = data; | |
753 | host->data_early = 0; | |
f6a03cbf | 754 | host->data->bytes_xfered = 0; |
ee53ab5d | 755 | |
a13abc7b | 756 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) |
c9fddbc4 PO |
757 | host->flags |= SDHCI_REQ_USE_DMA; |
758 | ||
2134a922 PO |
759 | /* |
760 | * FIXME: This doesn't account for merging when mapping the | |
761 | * scatterlist. | |
762 | */ | |
763 | if (host->flags & SDHCI_REQ_USE_DMA) { | |
764 | int broken, i; | |
765 | struct scatterlist *sg; | |
766 | ||
767 | broken = 0; | |
768 | if (host->flags & SDHCI_USE_ADMA) { | |
769 | if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) | |
770 | broken = 1; | |
771 | } else { | |
772 | if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) | |
773 | broken = 1; | |
774 | } | |
775 | ||
776 | if (unlikely(broken)) { | |
777 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
778 | if (sg->length & 0x3) { | |
779 | DBG("Reverting to PIO because of " | |
780 | "transfer size (%d)\n", | |
781 | sg->length); | |
782 | host->flags &= ~SDHCI_REQ_USE_DMA; | |
783 | break; | |
784 | } | |
785 | } | |
786 | } | |
c9fddbc4 PO |
787 | } |
788 | ||
789 | /* | |
790 | * The assumption here being that alignment is the same after | |
791 | * translation to device address space. | |
792 | */ | |
2134a922 PO |
793 | if (host->flags & SDHCI_REQ_USE_DMA) { |
794 | int broken, i; | |
795 | struct scatterlist *sg; | |
796 | ||
797 | broken = 0; | |
798 | if (host->flags & SDHCI_USE_ADMA) { | |
799 | /* | |
800 | * As we use 3 byte chunks to work around | |
801 | * alignment problems, we need to check this | |
802 | * quirk. | |
803 | */ | |
804 | if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) | |
805 | broken = 1; | |
806 | } else { | |
807 | if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) | |
808 | broken = 1; | |
809 | } | |
810 | ||
811 | if (unlikely(broken)) { | |
812 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
813 | if (sg->offset & 0x3) { | |
814 | DBG("Reverting to PIO because of " | |
815 | "bad alignment\n"); | |
816 | host->flags &= ~SDHCI_REQ_USE_DMA; | |
817 | break; | |
818 | } | |
819 | } | |
820 | } | |
821 | } | |
822 | ||
8f1934ce PO |
823 | if (host->flags & SDHCI_REQ_USE_DMA) { |
824 | if (host->flags & SDHCI_USE_ADMA) { | |
825 | ret = sdhci_adma_table_pre(host, data); | |
826 | if (ret) { | |
827 | /* | |
828 | * This only happens when someone fed | |
829 | * us an invalid request. | |
830 | */ | |
831 | WARN_ON(1); | |
ebd6d357 | 832 | host->flags &= ~SDHCI_REQ_USE_DMA; |
8f1934ce | 833 | } else { |
4e4141a5 AV |
834 | sdhci_writel(host, host->adma_addr, |
835 | SDHCI_ADMA_ADDRESS); | |
8f1934ce PO |
836 | } |
837 | } else { | |
c8b3e02e | 838 | int sg_cnt; |
8f1934ce | 839 | |
c8b3e02e | 840 | sg_cnt = dma_map_sg(mmc_dev(host->mmc), |
8f1934ce PO |
841 | data->sg, data->sg_len, |
842 | (data->flags & MMC_DATA_READ) ? | |
843 | DMA_FROM_DEVICE : | |
844 | DMA_TO_DEVICE); | |
c8b3e02e | 845 | if (sg_cnt == 0) { |
8f1934ce PO |
846 | /* |
847 | * This only happens when someone fed | |
848 | * us an invalid request. | |
849 | */ | |
850 | WARN_ON(1); | |
ebd6d357 | 851 | host->flags &= ~SDHCI_REQ_USE_DMA; |
8f1934ce | 852 | } else { |
719a61b4 | 853 | WARN_ON(sg_cnt != 1); |
4e4141a5 AV |
854 | sdhci_writel(host, sg_dma_address(data->sg), |
855 | SDHCI_DMA_ADDRESS); | |
8f1934ce PO |
856 | } |
857 | } | |
858 | } | |
859 | ||
2134a922 PO |
860 | /* |
861 | * Always adjust the DMA selection as some controllers | |
862 | * (e.g. JMicron) can't do PIO properly when the selection | |
863 | * is ADMA. | |
864 | */ | |
865 | if (host->version >= SDHCI_SPEC_200) { | |
4e4141a5 | 866 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
2134a922 PO |
867 | ctrl &= ~SDHCI_CTRL_DMA_MASK; |
868 | if ((host->flags & SDHCI_REQ_USE_DMA) && | |
869 | (host->flags & SDHCI_USE_ADMA)) | |
870 | ctrl |= SDHCI_CTRL_ADMA32; | |
871 | else | |
872 | ctrl |= SDHCI_CTRL_SDMA; | |
4e4141a5 | 873 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
c9fddbc4 PO |
874 | } |
875 | ||
8f1934ce | 876 | if (!(host->flags & SDHCI_REQ_USE_DMA)) { |
da60a91d SAS |
877 | int flags; |
878 | ||
879 | flags = SG_MITER_ATOMIC; | |
880 | if (host->data->flags & MMC_DATA_READ) | |
881 | flags |= SG_MITER_TO_SG; | |
882 | else | |
883 | flags |= SG_MITER_FROM_SG; | |
884 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
7659150c | 885 | host->blocks = data->blocks; |
d129bceb | 886 | } |
c7fa9963 | 887 | |
6aa943ab AV |
888 | sdhci_set_transfer_irqs(host); |
889 | ||
f6a03cbf MV |
890 | /* Set the DMA boundary value and block size */ |
891 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, | |
892 | data->blksz), SDHCI_BLOCK_SIZE); | |
4e4141a5 | 893 | sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT); |
c7fa9963 PO |
894 | } |
895 | ||
896 | static void sdhci_set_transfer_mode(struct sdhci_host *host, | |
e89d456f | 897 | struct mmc_command *cmd) |
c7fa9963 PO |
898 | { |
899 | u16 mode; | |
e89d456f | 900 | struct mmc_data *data = cmd->data; |
c7fa9963 | 901 | |
c7fa9963 PO |
902 | if (data == NULL) |
903 | return; | |
904 | ||
e538fbe8 PO |
905 | WARN_ON(!host->data); |
906 | ||
c7fa9963 | 907 | mode = SDHCI_TRNS_BLK_CNT_EN; |
e89d456f AW |
908 | if (mmc_op_multi(cmd->opcode) || data->blocks > 1) { |
909 | mode |= SDHCI_TRNS_MULTI; | |
910 | /* | |
911 | * If we are sending CMD23, CMD12 never gets sent | |
912 | * on successful completion (so no Auto-CMD12). | |
913 | */ | |
914 | if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) | |
915 | mode |= SDHCI_TRNS_AUTO_CMD12; | |
8edf6371 AW |
916 | else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) { |
917 | mode |= SDHCI_TRNS_AUTO_CMD23; | |
918 | sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2); | |
919 | } | |
c4512f79 | 920 | } |
8edf6371 | 921 | |
c7fa9963 PO |
922 | if (data->flags & MMC_DATA_READ) |
923 | mode |= SDHCI_TRNS_READ; | |
c9fddbc4 | 924 | if (host->flags & SDHCI_REQ_USE_DMA) |
c7fa9963 PO |
925 | mode |= SDHCI_TRNS_DMA; |
926 | ||
4e4141a5 | 927 | sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); |
d129bceb PO |
928 | } |
929 | ||
930 | static void sdhci_finish_data(struct sdhci_host *host) | |
931 | { | |
932 | struct mmc_data *data; | |
d129bceb PO |
933 | |
934 | BUG_ON(!host->data); | |
935 | ||
936 | data = host->data; | |
937 | host->data = NULL; | |
938 | ||
c9fddbc4 | 939 | if (host->flags & SDHCI_REQ_USE_DMA) { |
2134a922 PO |
940 | if (host->flags & SDHCI_USE_ADMA) |
941 | sdhci_adma_table_post(host, data); | |
942 | else { | |
943 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
944 | data->sg_len, (data->flags & MMC_DATA_READ) ? | |
945 | DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
946 | } | |
d129bceb PO |
947 | } |
948 | ||
949 | /* | |
c9b74c5b PO |
950 | * The specification states that the block count register must |
951 | * be updated, but it does not specify at what point in the | |
952 | * data flow. That makes the register entirely useless to read | |
953 | * back so we have to assume that nothing made it to the card | |
954 | * in the event of an error. | |
d129bceb | 955 | */ |
c9b74c5b PO |
956 | if (data->error) |
957 | data->bytes_xfered = 0; | |
d129bceb | 958 | else |
c9b74c5b | 959 | data->bytes_xfered = data->blksz * data->blocks; |
d129bceb | 960 | |
e89d456f AW |
961 | /* |
962 | * Need to send CMD12 if - | |
963 | * a) open-ended multiblock transfer (no CMD23) | |
964 | * b) error in multiblock transfer | |
965 | */ | |
966 | if (data->stop && | |
967 | (data->error || | |
968 | !host->mrq->sbc)) { | |
969 | ||
d129bceb PO |
970 | /* |
971 | * The controller needs a reset of internal state machines | |
972 | * upon error conditions. | |
973 | */ | |
17b0429d | 974 | if (data->error) { |
d129bceb PO |
975 | sdhci_reset(host, SDHCI_RESET_CMD); |
976 | sdhci_reset(host, SDHCI_RESET_DATA); | |
977 | } | |
978 | ||
979 | sdhci_send_command(host, data->stop); | |
980 | } else | |
981 | tasklet_schedule(&host->finish_tasklet); | |
982 | } | |
983 | ||
984 | static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) | |
985 | { | |
986 | int flags; | |
fd2208d7 | 987 | u32 mask; |
7cb2c76f | 988 | unsigned long timeout; |
d129bceb PO |
989 | |
990 | WARN_ON(host->cmd); | |
991 | ||
d129bceb | 992 | /* Wait max 10 ms */ |
7cb2c76f | 993 | timeout = 10; |
fd2208d7 PO |
994 | |
995 | mask = SDHCI_CMD_INHIBIT; | |
996 | if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY)) | |
997 | mask |= SDHCI_DATA_INHIBIT; | |
998 | ||
999 | /* We shouldn't wait for data inihibit for stop commands, even | |
1000 | though they might use busy signaling */ | |
1001 | if (host->mrq->data && (cmd == host->mrq->data->stop)) | |
1002 | mask &= ~SDHCI_DATA_INHIBIT; | |
1003 | ||
4e4141a5 | 1004 | while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
7cb2c76f | 1005 | if (timeout == 0) { |
a3c76eb9 | 1006 | pr_err("%s: Controller never released " |
acf1da45 | 1007 | "inhibit bit(s).\n", mmc_hostname(host->mmc)); |
d129bceb | 1008 | sdhci_dumpregs(host); |
17b0429d | 1009 | cmd->error = -EIO; |
d129bceb PO |
1010 | tasklet_schedule(&host->finish_tasklet); |
1011 | return; | |
1012 | } | |
7cb2c76f PO |
1013 | timeout--; |
1014 | mdelay(1); | |
1015 | } | |
d129bceb PO |
1016 | |
1017 | mod_timer(&host->timer, jiffies + 10 * HZ); | |
1018 | ||
1019 | host->cmd = cmd; | |
1020 | ||
a3c7778f | 1021 | sdhci_prepare_data(host, cmd); |
d129bceb | 1022 | |
4e4141a5 | 1023 | sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT); |
d129bceb | 1024 | |
e89d456f | 1025 | sdhci_set_transfer_mode(host, cmd); |
c7fa9963 | 1026 | |
d129bceb | 1027 | if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { |
a3c76eb9 | 1028 | pr_err("%s: Unsupported response type!\n", |
d129bceb | 1029 | mmc_hostname(host->mmc)); |
17b0429d | 1030 | cmd->error = -EINVAL; |
d129bceb PO |
1031 | tasklet_schedule(&host->finish_tasklet); |
1032 | return; | |
1033 | } | |
1034 | ||
1035 | if (!(cmd->flags & MMC_RSP_PRESENT)) | |
1036 | flags = SDHCI_CMD_RESP_NONE; | |
1037 | else if (cmd->flags & MMC_RSP_136) | |
1038 | flags = SDHCI_CMD_RESP_LONG; | |
1039 | else if (cmd->flags & MMC_RSP_BUSY) | |
1040 | flags = SDHCI_CMD_RESP_SHORT_BUSY; | |
1041 | else | |
1042 | flags = SDHCI_CMD_RESP_SHORT; | |
1043 | ||
1044 | if (cmd->flags & MMC_RSP_CRC) | |
1045 | flags |= SDHCI_CMD_CRC; | |
1046 | if (cmd->flags & MMC_RSP_OPCODE) | |
1047 | flags |= SDHCI_CMD_INDEX; | |
b513ea25 AN |
1048 | |
1049 | /* CMD19 is special in that the Data Present Select should be set */ | |
069c9f14 G |
1050 | if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK || |
1051 | cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200) | |
d129bceb PO |
1052 | flags |= SDHCI_CMD_DATA; |
1053 | ||
4e4141a5 | 1054 | sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND); |
d129bceb PO |
1055 | } |
1056 | ||
1057 | static void sdhci_finish_command(struct sdhci_host *host) | |
1058 | { | |
1059 | int i; | |
1060 | ||
1061 | BUG_ON(host->cmd == NULL); | |
1062 | ||
1063 | if (host->cmd->flags & MMC_RSP_PRESENT) { | |
1064 | if (host->cmd->flags & MMC_RSP_136) { | |
1065 | /* CRC is stripped so we need to do some shifting. */ | |
1066 | for (i = 0;i < 4;i++) { | |
4e4141a5 | 1067 | host->cmd->resp[i] = sdhci_readl(host, |
d129bceb PO |
1068 | SDHCI_RESPONSE + (3-i)*4) << 8; |
1069 | if (i != 3) | |
1070 | host->cmd->resp[i] |= | |
4e4141a5 | 1071 | sdhci_readb(host, |
d129bceb PO |
1072 | SDHCI_RESPONSE + (3-i)*4-1); |
1073 | } | |
1074 | } else { | |
4e4141a5 | 1075 | host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE); |
d129bceb PO |
1076 | } |
1077 | } | |
1078 | ||
17b0429d | 1079 | host->cmd->error = 0; |
d129bceb | 1080 | |
e89d456f AW |
1081 | /* Finished CMD23, now send actual command. */ |
1082 | if (host->cmd == host->mrq->sbc) { | |
1083 | host->cmd = NULL; | |
1084 | sdhci_send_command(host, host->mrq->cmd); | |
1085 | } else { | |
e538fbe8 | 1086 | |
e89d456f AW |
1087 | /* Processed actual command. */ |
1088 | if (host->data && host->data_early) | |
1089 | sdhci_finish_data(host); | |
d129bceb | 1090 | |
e89d456f AW |
1091 | if (!host->cmd->data) |
1092 | tasklet_schedule(&host->finish_tasklet); | |
1093 | ||
1094 | host->cmd = NULL; | |
1095 | } | |
d129bceb PO |
1096 | } |
1097 | ||
52983382 KL |
1098 | static u16 sdhci_get_preset_value(struct sdhci_host *host) |
1099 | { | |
1100 | u16 ctrl, preset = 0; | |
1101 | ||
1102 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1103 | ||
1104 | switch (ctrl & SDHCI_CTRL_UHS_MASK) { | |
1105 | case SDHCI_CTRL_UHS_SDR12: | |
1106 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12); | |
1107 | break; | |
1108 | case SDHCI_CTRL_UHS_SDR25: | |
1109 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR25); | |
1110 | break; | |
1111 | case SDHCI_CTRL_UHS_SDR50: | |
1112 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR50); | |
1113 | break; | |
1114 | case SDHCI_CTRL_UHS_SDR104: | |
1115 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104); | |
1116 | break; | |
1117 | case SDHCI_CTRL_UHS_DDR50: | |
1118 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_DDR50); | |
1119 | break; | |
1120 | default: | |
1121 | pr_warn("%s: Invalid UHS-I mode selected\n", | |
1122 | mmc_hostname(host->mmc)); | |
1123 | preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12); | |
1124 | break; | |
1125 | } | |
1126 | return preset; | |
1127 | } | |
1128 | ||
d129bceb PO |
1129 | static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) |
1130 | { | |
c3ed3877 | 1131 | int div = 0; /* Initialized for compiler warning */ |
df16219f | 1132 | int real_div = div, clk_mul = 1; |
c3ed3877 | 1133 | u16 clk = 0; |
7cb2c76f | 1134 | unsigned long timeout; |
d129bceb | 1135 | |
30832ab5 | 1136 | if (clock && clock == host->clock) |
d129bceb PO |
1137 | return; |
1138 | ||
df16219f GC |
1139 | host->mmc->actual_clock = 0; |
1140 | ||
8114634c AV |
1141 | if (host->ops->set_clock) { |
1142 | host->ops->set_clock(host, clock); | |
1143 | if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) | |
1144 | return; | |
1145 | } | |
1146 | ||
4e4141a5 | 1147 | sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); |
d129bceb PO |
1148 | |
1149 | if (clock == 0) | |
1150 | goto out; | |
1151 | ||
85105c53 | 1152 | if (host->version >= SDHCI_SPEC_300) { |
52983382 KL |
1153 | if (sdhci_readw(host, SDHCI_HOST_CONTROL2) & |
1154 | SDHCI_CTRL_PRESET_VAL_ENABLE) { | |
1155 | u16 pre_val; | |
1156 | ||
1157 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1158 | pre_val = sdhci_get_preset_value(host); | |
1159 | div = (pre_val & SDHCI_PRESET_SDCLK_FREQ_MASK) | |
1160 | >> SDHCI_PRESET_SDCLK_FREQ_SHIFT; | |
1161 | if (host->clk_mul && | |
1162 | (pre_val & SDHCI_PRESET_CLKGEN_SEL_MASK)) { | |
1163 | clk = SDHCI_PROG_CLOCK_MODE; | |
1164 | real_div = div + 1; | |
1165 | clk_mul = host->clk_mul; | |
1166 | } else { | |
1167 | real_div = max_t(int, 1, div << 1); | |
1168 | } | |
1169 | goto clock_set; | |
1170 | } | |
1171 | ||
c3ed3877 AN |
1172 | /* |
1173 | * Check if the Host Controller supports Programmable Clock | |
1174 | * Mode. | |
1175 | */ | |
1176 | if (host->clk_mul) { | |
52983382 KL |
1177 | for (div = 1; div <= 1024; div++) { |
1178 | if ((host->max_clk * host->clk_mul / div) | |
1179 | <= clock) | |
1180 | break; | |
1181 | } | |
c3ed3877 | 1182 | /* |
52983382 KL |
1183 | * Set Programmable Clock Mode in the Clock |
1184 | * Control register. | |
c3ed3877 | 1185 | */ |
52983382 KL |
1186 | clk = SDHCI_PROG_CLOCK_MODE; |
1187 | real_div = div; | |
1188 | clk_mul = host->clk_mul; | |
1189 | div--; | |
c3ed3877 AN |
1190 | } else { |
1191 | /* Version 3.00 divisors must be a multiple of 2. */ | |
1192 | if (host->max_clk <= clock) | |
1193 | div = 1; | |
1194 | else { | |
1195 | for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; | |
1196 | div += 2) { | |
1197 | if ((host->max_clk / div) <= clock) | |
1198 | break; | |
1199 | } | |
85105c53 | 1200 | } |
df16219f | 1201 | real_div = div; |
c3ed3877 | 1202 | div >>= 1; |
85105c53 ZG |
1203 | } |
1204 | } else { | |
1205 | /* Version 2.00 divisors must be a power of 2. */ | |
0397526d | 1206 | for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) { |
85105c53 ZG |
1207 | if ((host->max_clk / div) <= clock) |
1208 | break; | |
1209 | } | |
df16219f | 1210 | real_div = div; |
c3ed3877 | 1211 | div >>= 1; |
d129bceb | 1212 | } |
d129bceb | 1213 | |
52983382 | 1214 | clock_set: |
df16219f GC |
1215 | if (real_div) |
1216 | host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div; | |
1217 | ||
c3ed3877 | 1218 | clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; |
85105c53 ZG |
1219 | clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) |
1220 | << SDHCI_DIVIDER_HI_SHIFT; | |
d129bceb | 1221 | clk |= SDHCI_CLOCK_INT_EN; |
4e4141a5 | 1222 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
d129bceb | 1223 | |
27f6cb16 CB |
1224 | /* Wait max 20 ms */ |
1225 | timeout = 20; | |
4e4141a5 | 1226 | while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) |
7cb2c76f PO |
1227 | & SDHCI_CLOCK_INT_STABLE)) { |
1228 | if (timeout == 0) { | |
a3c76eb9 | 1229 | pr_err("%s: Internal clock never " |
acf1da45 | 1230 | "stabilised.\n", mmc_hostname(host->mmc)); |
d129bceb PO |
1231 | sdhci_dumpregs(host); |
1232 | return; | |
1233 | } | |
7cb2c76f PO |
1234 | timeout--; |
1235 | mdelay(1); | |
1236 | } | |
d129bceb PO |
1237 | |
1238 | clk |= SDHCI_CLOCK_CARD_EN; | |
4e4141a5 | 1239 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
d129bceb PO |
1240 | |
1241 | out: | |
1242 | host->clock = clock; | |
1243 | } | |
1244 | ||
8213af3b AS |
1245 | static inline void sdhci_update_clock(struct sdhci_host *host) |
1246 | { | |
1247 | unsigned int clock; | |
1248 | ||
1249 | clock = host->clock; | |
1250 | host->clock = 0; | |
1251 | sdhci_set_clock(host, clock); | |
1252 | } | |
1253 | ||
ceb6143b | 1254 | static int sdhci_set_power(struct sdhci_host *host, unsigned short power) |
146ad66e | 1255 | { |
8364248a | 1256 | u8 pwr = 0; |
146ad66e | 1257 | |
8364248a | 1258 | if (power != (unsigned short)-1) { |
ae628903 PO |
1259 | switch (1 << power) { |
1260 | case MMC_VDD_165_195: | |
1261 | pwr = SDHCI_POWER_180; | |
1262 | break; | |
1263 | case MMC_VDD_29_30: | |
1264 | case MMC_VDD_30_31: | |
1265 | pwr = SDHCI_POWER_300; | |
1266 | break; | |
1267 | case MMC_VDD_32_33: | |
1268 | case MMC_VDD_33_34: | |
1269 | pwr = SDHCI_POWER_330; | |
1270 | break; | |
1271 | default: | |
1272 | BUG(); | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | if (host->pwr == pwr) | |
ceb6143b | 1277 | return -1; |
146ad66e | 1278 | |
ae628903 PO |
1279 | host->pwr = pwr; |
1280 | ||
1281 | if (pwr == 0) { | |
4e4141a5 | 1282 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
f0710a55 AH |
1283 | if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) |
1284 | sdhci_runtime_pm_bus_off(host); | |
ceb6143b | 1285 | return 0; |
9e9dc5f2 DS |
1286 | } |
1287 | ||
1288 | /* | |
1289 | * Spec says that we should clear the power reg before setting | |
1290 | * a new value. Some controllers don't seem to like this though. | |
1291 | */ | |
b8c86fc5 | 1292 | if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE)) |
4e4141a5 | 1293 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
146ad66e | 1294 | |
e08c1694 | 1295 | /* |
c71f6512 | 1296 | * At least the Marvell CaFe chip gets confused if we set the voltage |
e08c1694 AS |
1297 | * and set turn on power at the same time, so set the voltage first. |
1298 | */ | |
11a2f1b7 | 1299 | if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) |
ae628903 | 1300 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
e08c1694 | 1301 | |
ae628903 | 1302 | pwr |= SDHCI_POWER_ON; |
146ad66e | 1303 | |
ae628903 | 1304 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
557b0697 | 1305 | |
f0710a55 AH |
1306 | if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) |
1307 | sdhci_runtime_pm_bus_on(host); | |
1308 | ||
557b0697 HW |
1309 | /* |
1310 | * Some controllers need an extra 10ms delay of 10ms before they | |
1311 | * can apply clock after applying power | |
1312 | */ | |
11a2f1b7 | 1313 | if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) |
557b0697 | 1314 | mdelay(10); |
ceb6143b AH |
1315 | |
1316 | return power; | |
146ad66e PO |
1317 | } |
1318 | ||
d129bceb PO |
1319 | /*****************************************************************************\ |
1320 | * * | |
1321 | * MMC callbacks * | |
1322 | * * | |
1323 | \*****************************************************************************/ | |
1324 | ||
1325 | static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1326 | { | |
1327 | struct sdhci_host *host; | |
505a8680 | 1328 | int present; |
d129bceb | 1329 | unsigned long flags; |
473b095a | 1330 | u32 tuning_opcode; |
d129bceb PO |
1331 | |
1332 | host = mmc_priv(mmc); | |
1333 | ||
66fd8ad5 AH |
1334 | sdhci_runtime_pm_get(host); |
1335 | ||
d129bceb PO |
1336 | spin_lock_irqsave(&host->lock, flags); |
1337 | ||
1338 | WARN_ON(host->mrq != NULL); | |
1339 | ||
f9134319 | 1340 | #ifndef SDHCI_USE_LEDS_CLASS |
d129bceb | 1341 | sdhci_activate_led(host); |
2f730fec | 1342 | #endif |
e89d456f AW |
1343 | |
1344 | /* | |
1345 | * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED | |
1346 | * requests if Auto-CMD12 is enabled. | |
1347 | */ | |
1348 | if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) { | |
c4512f79 JH |
1349 | if (mrq->stop) { |
1350 | mrq->data->stop = NULL; | |
1351 | mrq->stop = NULL; | |
1352 | } | |
1353 | } | |
d129bceb PO |
1354 | |
1355 | host->mrq = mrq; | |
1356 | ||
505a8680 SG |
1357 | /* |
1358 | * Firstly check card presence from cd-gpio. The return could | |
1359 | * be one of the following possibilities: | |
1360 | * negative: cd-gpio is not available | |
1361 | * zero: cd-gpio is used, and card is removed | |
1362 | * one: cd-gpio is used, and card is present | |
1363 | */ | |
1364 | present = mmc_gpio_get_cd(host->mmc); | |
1365 | if (present < 0) { | |
1366 | /* If polling, assume that the card is always present. */ | |
1367 | if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) | |
1368 | present = 1; | |
1369 | else | |
1370 | present = sdhci_readl(host, SDHCI_PRESENT_STATE) & | |
1371 | SDHCI_CARD_PRESENT; | |
bec9d4e5 GL |
1372 | } |
1373 | ||
68d1fb7e | 1374 | if (!present || host->flags & SDHCI_DEVICE_DEAD) { |
17b0429d | 1375 | host->mrq->cmd->error = -ENOMEDIUM; |
d129bceb | 1376 | tasklet_schedule(&host->finish_tasklet); |
cf2b5eea AN |
1377 | } else { |
1378 | u32 present_state; | |
1379 | ||
1380 | present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); | |
1381 | /* | |
1382 | * Check if the re-tuning timer has already expired and there | |
1383 | * is no on-going data transfer. If so, we need to execute | |
1384 | * tuning procedure before sending command. | |
1385 | */ | |
1386 | if ((host->flags & SDHCI_NEEDS_RETUNING) && | |
1387 | !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) { | |
14efd957 CB |
1388 | if (mmc->card) { |
1389 | /* eMMC uses cmd21 but sd and sdio use cmd19 */ | |
1390 | tuning_opcode = | |
1391 | mmc->card->type == MMC_TYPE_MMC ? | |
1392 | MMC_SEND_TUNING_BLOCK_HS200 : | |
1393 | MMC_SEND_TUNING_BLOCK; | |
1394 | spin_unlock_irqrestore(&host->lock, flags); | |
1395 | sdhci_execute_tuning(mmc, tuning_opcode); | |
1396 | spin_lock_irqsave(&host->lock, flags); | |
1397 | ||
1398 | /* Restore original mmc_request structure */ | |
1399 | host->mrq = mrq; | |
1400 | } | |
cf2b5eea AN |
1401 | } |
1402 | ||
8edf6371 | 1403 | if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23)) |
e89d456f AW |
1404 | sdhci_send_command(host, mrq->sbc); |
1405 | else | |
1406 | sdhci_send_command(host, mrq->cmd); | |
cf2b5eea | 1407 | } |
d129bceb | 1408 | |
5f25a66f | 1409 | mmiowb(); |
d129bceb PO |
1410 | spin_unlock_irqrestore(&host->lock, flags); |
1411 | } | |
1412 | ||
66fd8ad5 | 1413 | static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) |
d129bceb | 1414 | { |
d129bceb | 1415 | unsigned long flags; |
ceb6143b | 1416 | int vdd_bit = -1; |
d129bceb PO |
1417 | u8 ctrl; |
1418 | ||
d129bceb PO |
1419 | spin_lock_irqsave(&host->lock, flags); |
1420 | ||
ceb6143b AH |
1421 | if (host->flags & SDHCI_DEVICE_DEAD) { |
1422 | spin_unlock_irqrestore(&host->lock, flags); | |
1423 | if (host->vmmc && ios->power_mode == MMC_POWER_OFF) | |
1424 | mmc_regulator_set_ocr(host->mmc, host->vmmc, 0); | |
1425 | return; | |
1426 | } | |
1e72859e | 1427 | |
d129bceb PO |
1428 | /* |
1429 | * Reset the chip on each power off. | |
1430 | * Should clear out any weird states. | |
1431 | */ | |
1432 | if (ios->power_mode == MMC_POWER_OFF) { | |
4e4141a5 | 1433 | sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); |
7260cf5e | 1434 | sdhci_reinit(host); |
d129bceb PO |
1435 | } |
1436 | ||
52983382 KL |
1437 | if (host->version >= SDHCI_SPEC_300 && |
1438 | (ios->power_mode == MMC_POWER_UP)) | |
1439 | sdhci_enable_preset_value(host, false); | |
1440 | ||
d129bceb PO |
1441 | sdhci_set_clock(host, ios->clock); |
1442 | ||
1443 | if (ios->power_mode == MMC_POWER_OFF) | |
ceb6143b | 1444 | vdd_bit = sdhci_set_power(host, -1); |
d129bceb | 1445 | else |
ceb6143b AH |
1446 | vdd_bit = sdhci_set_power(host, ios->vdd); |
1447 | ||
1448 | if (host->vmmc && vdd_bit != -1) { | |
1449 | spin_unlock_irqrestore(&host->lock, flags); | |
1450 | mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd_bit); | |
1451 | spin_lock_irqsave(&host->lock, flags); | |
1452 | } | |
d129bceb | 1453 | |
643a81ff PR |
1454 | if (host->ops->platform_send_init_74_clocks) |
1455 | host->ops->platform_send_init_74_clocks(host, ios->power_mode); | |
1456 | ||
15ec4461 PR |
1457 | /* |
1458 | * If your platform has 8-bit width support but is not a v3 controller, | |
1459 | * or if it requires special setup code, you should implement that in | |
7bc088d3 | 1460 | * platform_bus_width(). |
15ec4461 | 1461 | */ |
7bc088d3 SH |
1462 | if (host->ops->platform_bus_width) { |
1463 | host->ops->platform_bus_width(host, ios->bus_width); | |
1464 | } else { | |
15ec4461 PR |
1465 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
1466 | if (ios->bus_width == MMC_BUS_WIDTH_8) { | |
1467 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
1468 | if (host->version >= SDHCI_SPEC_300) | |
1469 | ctrl |= SDHCI_CTRL_8BITBUS; | |
1470 | } else { | |
1471 | if (host->version >= SDHCI_SPEC_300) | |
1472 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
1473 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
1474 | ctrl |= SDHCI_CTRL_4BITBUS; | |
1475 | else | |
1476 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
1477 | } | |
1478 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
1479 | } | |
ae6d6c92 | 1480 | |
15ec4461 | 1481 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
cd9277c0 | 1482 | |
3ab9c8da PR |
1483 | if ((ios->timing == MMC_TIMING_SD_HS || |
1484 | ios->timing == MMC_TIMING_MMC_HS) | |
1485 | && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)) | |
cd9277c0 PO |
1486 | ctrl |= SDHCI_CTRL_HISPD; |
1487 | else | |
1488 | ctrl &= ~SDHCI_CTRL_HISPD; | |
1489 | ||
d6d50a15 | 1490 | if (host->version >= SDHCI_SPEC_300) { |
49c468fc | 1491 | u16 clk, ctrl_2; |
49c468fc AN |
1492 | |
1493 | /* In case of UHS-I modes, set High Speed Enable */ | |
069c9f14 G |
1494 | if ((ios->timing == MMC_TIMING_MMC_HS200) || |
1495 | (ios->timing == MMC_TIMING_UHS_SDR50) || | |
49c468fc AN |
1496 | (ios->timing == MMC_TIMING_UHS_SDR104) || |
1497 | (ios->timing == MMC_TIMING_UHS_DDR50) || | |
dd8df17f | 1498 | (ios->timing == MMC_TIMING_UHS_SDR25)) |
49c468fc | 1499 | ctrl |= SDHCI_CTRL_HISPD; |
d6d50a15 AN |
1500 | |
1501 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1502 | if (!(ctrl_2 & SDHCI_CTRL_PRESET_VAL_ENABLE)) { | |
758535c4 | 1503 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d6d50a15 AN |
1504 | /* |
1505 | * We only need to set Driver Strength if the | |
1506 | * preset value enable is not set. | |
1507 | */ | |
1508 | ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK; | |
1509 | if (ios->drv_type == MMC_SET_DRIVER_TYPE_A) | |
1510 | ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A; | |
1511 | else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C) | |
1512 | ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C; | |
1513 | ||
1514 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); | |
758535c4 AN |
1515 | } else { |
1516 | /* | |
1517 | * According to SDHC Spec v3.00, if the Preset Value | |
1518 | * Enable in the Host Control 2 register is set, we | |
1519 | * need to reset SD Clock Enable before changing High | |
1520 | * Speed Enable to avoid generating clock gliches. | |
1521 | */ | |
758535c4 AN |
1522 | |
1523 | /* Reset SD Clock Enable */ | |
1524 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1525 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1526 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1527 | ||
1528 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
1529 | ||
1530 | /* Re-enable SD Clock */ | |
8213af3b | 1531 | sdhci_update_clock(host); |
d6d50a15 | 1532 | } |
49c468fc | 1533 | |
49c468fc AN |
1534 | |
1535 | /* Reset SD Clock Enable */ | |
1536 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1537 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1538 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1539 | ||
6322cdd0 PR |
1540 | if (host->ops->set_uhs_signaling) |
1541 | host->ops->set_uhs_signaling(host, ios->timing); | |
1542 | else { | |
1543 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1544 | /* Select Bus Speed Mode for host */ | |
1545 | ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; | |
59911568 GC |
1546 | if ((ios->timing == MMC_TIMING_MMC_HS200) || |
1547 | (ios->timing == MMC_TIMING_UHS_SDR104)) | |
1548 | ctrl_2 |= SDHCI_CTRL_UHS_SDR104; | |
069c9f14 | 1549 | else if (ios->timing == MMC_TIMING_UHS_SDR12) |
6322cdd0 PR |
1550 | ctrl_2 |= SDHCI_CTRL_UHS_SDR12; |
1551 | else if (ios->timing == MMC_TIMING_UHS_SDR25) | |
1552 | ctrl_2 |= SDHCI_CTRL_UHS_SDR25; | |
1553 | else if (ios->timing == MMC_TIMING_UHS_SDR50) | |
1554 | ctrl_2 |= SDHCI_CTRL_UHS_SDR50; | |
6322cdd0 PR |
1555 | else if (ios->timing == MMC_TIMING_UHS_DDR50) |
1556 | ctrl_2 |= SDHCI_CTRL_UHS_DDR50; | |
1557 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); | |
1558 | } | |
49c468fc | 1559 | |
52983382 KL |
1560 | if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN) && |
1561 | ((ios->timing == MMC_TIMING_UHS_SDR12) || | |
1562 | (ios->timing == MMC_TIMING_UHS_SDR25) || | |
1563 | (ios->timing == MMC_TIMING_UHS_SDR50) || | |
1564 | (ios->timing == MMC_TIMING_UHS_SDR104) || | |
1565 | (ios->timing == MMC_TIMING_UHS_DDR50))) { | |
1566 | u16 preset; | |
1567 | ||
1568 | sdhci_enable_preset_value(host, true); | |
1569 | preset = sdhci_get_preset_value(host); | |
1570 | ios->drv_type = (preset & SDHCI_PRESET_DRV_MASK) | |
1571 | >> SDHCI_PRESET_DRV_SHIFT; | |
1572 | } | |
1573 | ||
49c468fc | 1574 | /* Re-enable SD Clock */ |
8213af3b | 1575 | sdhci_update_clock(host); |
758535c4 AN |
1576 | } else |
1577 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
d6d50a15 | 1578 | |
b8352260 LD |
1579 | /* |
1580 | * Some (ENE) controllers go apeshit on some ios operation, | |
1581 | * signalling timeout and CRC errors even on CMD0. Resetting | |
1582 | * it on each ios seems to solve the problem. | |
1583 | */ | |
b8c86fc5 | 1584 | if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS) |
b8352260 LD |
1585 | sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); |
1586 | ||
5f25a66f | 1587 | mmiowb(); |
d129bceb PO |
1588 | spin_unlock_irqrestore(&host->lock, flags); |
1589 | } | |
1590 | ||
66fd8ad5 AH |
1591 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
1592 | { | |
1593 | struct sdhci_host *host = mmc_priv(mmc); | |
1594 | ||
1595 | sdhci_runtime_pm_get(host); | |
1596 | sdhci_do_set_ios(host, ios); | |
1597 | sdhci_runtime_pm_put(host); | |
1598 | } | |
1599 | ||
94144a46 KL |
1600 | static int sdhci_do_get_cd(struct sdhci_host *host) |
1601 | { | |
1602 | int gpio_cd = mmc_gpio_get_cd(host->mmc); | |
1603 | ||
1604 | if (host->flags & SDHCI_DEVICE_DEAD) | |
1605 | return 0; | |
1606 | ||
1607 | /* If polling/nonremovable, assume that the card is always present. */ | |
1608 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || | |
1609 | (host->mmc->caps & MMC_CAP_NONREMOVABLE)) | |
1610 | return 1; | |
1611 | ||
1612 | /* Try slot gpio detect */ | |
1613 | if (!IS_ERR_VALUE(gpio_cd)) | |
1614 | return !!gpio_cd; | |
1615 | ||
1616 | /* Host native card detect */ | |
1617 | return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); | |
1618 | } | |
1619 | ||
1620 | static int sdhci_get_cd(struct mmc_host *mmc) | |
1621 | { | |
1622 | struct sdhci_host *host = mmc_priv(mmc); | |
1623 | int ret; | |
1624 | ||
1625 | sdhci_runtime_pm_get(host); | |
1626 | ret = sdhci_do_get_cd(host); | |
1627 | sdhci_runtime_pm_put(host); | |
1628 | return ret; | |
1629 | } | |
1630 | ||
66fd8ad5 | 1631 | static int sdhci_check_ro(struct sdhci_host *host) |
d129bceb | 1632 | { |
d129bceb | 1633 | unsigned long flags; |
2dfb579c | 1634 | int is_readonly; |
d129bceb | 1635 | |
d129bceb PO |
1636 | spin_lock_irqsave(&host->lock, flags); |
1637 | ||
1e72859e | 1638 | if (host->flags & SDHCI_DEVICE_DEAD) |
2dfb579c WS |
1639 | is_readonly = 0; |
1640 | else if (host->ops->get_ro) | |
1641 | is_readonly = host->ops->get_ro(host); | |
1e72859e | 1642 | else |
2dfb579c WS |
1643 | is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE) |
1644 | & SDHCI_WRITE_PROTECT); | |
d129bceb PO |
1645 | |
1646 | spin_unlock_irqrestore(&host->lock, flags); | |
1647 | ||
2dfb579c WS |
1648 | /* This quirk needs to be replaced by a callback-function later */ |
1649 | return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ? | |
1650 | !is_readonly : is_readonly; | |
d129bceb PO |
1651 | } |
1652 | ||
82b0e23a TI |
1653 | #define SAMPLE_COUNT 5 |
1654 | ||
66fd8ad5 | 1655 | static int sdhci_do_get_ro(struct sdhci_host *host) |
82b0e23a | 1656 | { |
82b0e23a TI |
1657 | int i, ro_count; |
1658 | ||
82b0e23a | 1659 | if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT)) |
66fd8ad5 | 1660 | return sdhci_check_ro(host); |
82b0e23a TI |
1661 | |
1662 | ro_count = 0; | |
1663 | for (i = 0; i < SAMPLE_COUNT; i++) { | |
66fd8ad5 | 1664 | if (sdhci_check_ro(host)) { |
82b0e23a TI |
1665 | if (++ro_count > SAMPLE_COUNT / 2) |
1666 | return 1; | |
1667 | } | |
1668 | msleep(30); | |
1669 | } | |
1670 | return 0; | |
1671 | } | |
1672 | ||
20758b66 AH |
1673 | static void sdhci_hw_reset(struct mmc_host *mmc) |
1674 | { | |
1675 | struct sdhci_host *host = mmc_priv(mmc); | |
1676 | ||
1677 | if (host->ops && host->ops->hw_reset) | |
1678 | host->ops->hw_reset(host); | |
1679 | } | |
1680 | ||
66fd8ad5 | 1681 | static int sdhci_get_ro(struct mmc_host *mmc) |
f75979b7 | 1682 | { |
66fd8ad5 AH |
1683 | struct sdhci_host *host = mmc_priv(mmc); |
1684 | int ret; | |
f75979b7 | 1685 | |
66fd8ad5 AH |
1686 | sdhci_runtime_pm_get(host); |
1687 | ret = sdhci_do_get_ro(host); | |
1688 | sdhci_runtime_pm_put(host); | |
1689 | return ret; | |
1690 | } | |
f75979b7 | 1691 | |
66fd8ad5 AH |
1692 | static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable) |
1693 | { | |
1e72859e PO |
1694 | if (host->flags & SDHCI_DEVICE_DEAD) |
1695 | goto out; | |
1696 | ||
66fd8ad5 AH |
1697 | if (enable) |
1698 | host->flags |= SDHCI_SDIO_IRQ_ENABLED; | |
1699 | else | |
1700 | host->flags &= ~SDHCI_SDIO_IRQ_ENABLED; | |
1701 | ||
1702 | /* SDIO IRQ will be enabled as appropriate in runtime resume */ | |
1703 | if (host->runtime_suspended) | |
1704 | goto out; | |
1705 | ||
f75979b7 | 1706 | if (enable) |
7260cf5e AV |
1707 | sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT); |
1708 | else | |
1709 | sdhci_mask_irqs(host, SDHCI_INT_CARD_INT); | |
1e72859e | 1710 | out: |
f75979b7 | 1711 | mmiowb(); |
66fd8ad5 AH |
1712 | } |
1713 | ||
1714 | static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) | |
1715 | { | |
1716 | struct sdhci_host *host = mmc_priv(mmc); | |
1717 | unsigned long flags; | |
f75979b7 | 1718 | |
66fd8ad5 AH |
1719 | spin_lock_irqsave(&host->lock, flags); |
1720 | sdhci_enable_sdio_irq_nolock(host, enable); | |
f75979b7 PO |
1721 | spin_unlock_irqrestore(&host->lock, flags); |
1722 | } | |
1723 | ||
20b92a30 | 1724 | static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, |
21f5998f | 1725 | struct mmc_ios *ios) |
f2119df6 | 1726 | { |
20b92a30 | 1727 | u16 ctrl; |
6231f3de | 1728 | int ret; |
f2119df6 | 1729 | |
20b92a30 KL |
1730 | /* |
1731 | * Signal Voltage Switching is only applicable for Host Controllers | |
1732 | * v3.00 and above. | |
1733 | */ | |
1734 | if (host->version < SDHCI_SPEC_300) | |
1735 | return 0; | |
6231f3de | 1736 | |
f2119df6 | 1737 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
f2119df6 | 1738 | |
21f5998f | 1739 | switch (ios->signal_voltage) { |
20b92a30 KL |
1740 | case MMC_SIGNAL_VOLTAGE_330: |
1741 | /* Set 1.8V Signal Enable in the Host Control2 register to 0 */ | |
1742 | ctrl &= ~SDHCI_CTRL_VDD_180; | |
1743 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
f2119df6 | 1744 | |
20b92a30 KL |
1745 | if (host->vqmmc) { |
1746 | ret = regulator_set_voltage(host->vqmmc, 2700000, 3600000); | |
1747 | if (ret) { | |
1748 | pr_warning("%s: Switching to 3.3V signalling voltage " | |
1749 | " failed\n", mmc_hostname(host->mmc)); | |
1750 | return -EIO; | |
1751 | } | |
1752 | } | |
1753 | /* Wait for 5ms */ | |
1754 | usleep_range(5000, 5500); | |
f2119df6 | 1755 | |
20b92a30 KL |
1756 | /* 3.3V regulator output should be stable within 5 ms */ |
1757 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1758 | if (!(ctrl & SDHCI_CTRL_VDD_180)) | |
1759 | return 0; | |
6231f3de | 1760 | |
20b92a30 KL |
1761 | pr_warning("%s: 3.3V regulator output did not became stable\n", |
1762 | mmc_hostname(host->mmc)); | |
1763 | ||
1764 | return -EAGAIN; | |
1765 | case MMC_SIGNAL_VOLTAGE_180: | |
1766 | if (host->vqmmc) { | |
1767 | ret = regulator_set_voltage(host->vqmmc, | |
1768 | 1700000, 1950000); | |
1769 | if (ret) { | |
1770 | pr_warning("%s: Switching to 1.8V signalling voltage " | |
1771 | " failed\n", mmc_hostname(host->mmc)); | |
1772 | return -EIO; | |
1773 | } | |
1774 | } | |
6231f3de | 1775 | |
6231f3de PR |
1776 | /* |
1777 | * Enable 1.8V Signal Enable in the Host Control2 | |
1778 | * register | |
1779 | */ | |
20b92a30 KL |
1780 | ctrl |= SDHCI_CTRL_VDD_180; |
1781 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
6231f3de | 1782 | |
20b92a30 KL |
1783 | /* Wait for 5ms */ |
1784 | usleep_range(5000, 5500); | |
f2119df6 | 1785 | |
20b92a30 KL |
1786 | /* 1.8V regulator output should be stable within 5 ms */ |
1787 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1788 | if (ctrl & SDHCI_CTRL_VDD_180) | |
1789 | return 0; | |
f2119df6 | 1790 | |
20b92a30 KL |
1791 | pr_warning("%s: 1.8V regulator output did not became stable\n", |
1792 | mmc_hostname(host->mmc)); | |
f2119df6 | 1793 | |
20b92a30 KL |
1794 | return -EAGAIN; |
1795 | case MMC_SIGNAL_VOLTAGE_120: | |
1796 | if (host->vqmmc) { | |
1797 | ret = regulator_set_voltage(host->vqmmc, 1100000, 1300000); | |
1798 | if (ret) { | |
1799 | pr_warning("%s: Switching to 1.2V signalling voltage " | |
1800 | " failed\n", mmc_hostname(host->mmc)); | |
1801 | return -EIO; | |
f2119df6 AN |
1802 | } |
1803 | } | |
6231f3de | 1804 | return 0; |
20b92a30 | 1805 | default: |
f2119df6 AN |
1806 | /* No signal voltage switch required */ |
1807 | return 0; | |
20b92a30 | 1808 | } |
f2119df6 AN |
1809 | } |
1810 | ||
66fd8ad5 | 1811 | static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, |
21f5998f | 1812 | struct mmc_ios *ios) |
66fd8ad5 AH |
1813 | { |
1814 | struct sdhci_host *host = mmc_priv(mmc); | |
1815 | int err; | |
1816 | ||
1817 | if (host->version < SDHCI_SPEC_300) | |
1818 | return 0; | |
1819 | sdhci_runtime_pm_get(host); | |
21f5998f | 1820 | err = sdhci_do_start_signal_voltage_switch(host, ios); |
66fd8ad5 AH |
1821 | sdhci_runtime_pm_put(host); |
1822 | return err; | |
1823 | } | |
1824 | ||
20b92a30 KL |
1825 | static int sdhci_card_busy(struct mmc_host *mmc) |
1826 | { | |
1827 | struct sdhci_host *host = mmc_priv(mmc); | |
1828 | u32 present_state; | |
1829 | ||
1830 | sdhci_runtime_pm_get(host); | |
1831 | /* Check whether DAT[3:0] is 0000 */ | |
1832 | present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); | |
1833 | sdhci_runtime_pm_put(host); | |
1834 | ||
1835 | return !(present_state & SDHCI_DATA_LVL_MASK); | |
1836 | } | |
1837 | ||
069c9f14 | 1838 | static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
b513ea25 AN |
1839 | { |
1840 | struct sdhci_host *host; | |
1841 | u16 ctrl; | |
1842 | u32 ier; | |
1843 | int tuning_loop_counter = MAX_TUNING_LOOP; | |
1844 | unsigned long timeout; | |
1845 | int err = 0; | |
069c9f14 | 1846 | bool requires_tuning_nonuhs = false; |
b513ea25 AN |
1847 | |
1848 | host = mmc_priv(mmc); | |
1849 | ||
66fd8ad5 | 1850 | sdhci_runtime_pm_get(host); |
b513ea25 AN |
1851 | disable_irq(host->irq); |
1852 | spin_lock(&host->lock); | |
1853 | ||
1854 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1855 | ||
1856 | /* | |
069c9f14 G |
1857 | * The Host Controller needs tuning only in case of SDR104 mode |
1858 | * and for SDR50 mode when Use Tuning for SDR50 is set in the | |
b513ea25 | 1859 | * Capabilities register. |
069c9f14 G |
1860 | * If the Host Controller supports the HS200 mode then the |
1861 | * tuning function has to be executed. | |
b513ea25 | 1862 | */ |
069c9f14 G |
1863 | if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) && |
1864 | (host->flags & SDHCI_SDR50_NEEDS_TUNING || | |
156e14b1 | 1865 | host->flags & SDHCI_SDR104_NEEDS_TUNING)) |
069c9f14 G |
1866 | requires_tuning_nonuhs = true; |
1867 | ||
b513ea25 | 1868 | if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) || |
069c9f14 | 1869 | requires_tuning_nonuhs) |
b513ea25 AN |
1870 | ctrl |= SDHCI_CTRL_EXEC_TUNING; |
1871 | else { | |
1872 | spin_unlock(&host->lock); | |
1873 | enable_irq(host->irq); | |
66fd8ad5 | 1874 | sdhci_runtime_pm_put(host); |
b513ea25 AN |
1875 | return 0; |
1876 | } | |
1877 | ||
45251812 DA |
1878 | if (host->ops->platform_execute_tuning) { |
1879 | spin_unlock(&host->lock); | |
1880 | enable_irq(host->irq); | |
1881 | err = host->ops->platform_execute_tuning(host, opcode); | |
1882 | sdhci_runtime_pm_put(host); | |
1883 | return err; | |
1884 | } | |
1885 | ||
b513ea25 AN |
1886 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
1887 | ||
1888 | /* | |
1889 | * As per the Host Controller spec v3.00, tuning command | |
1890 | * generates Buffer Read Ready interrupt, so enable that. | |
1891 | * | |
1892 | * Note: The spec clearly says that when tuning sequence | |
1893 | * is being performed, the controller does not generate | |
1894 | * interrupts other than Buffer Read Ready interrupt. But | |
1895 | * to make sure we don't hit a controller bug, we _only_ | |
1896 | * enable Buffer Read Ready interrupt here. | |
1897 | */ | |
1898 | ier = sdhci_readl(host, SDHCI_INT_ENABLE); | |
1899 | sdhci_clear_set_irqs(host, ier, SDHCI_INT_DATA_AVAIL); | |
1900 | ||
1901 | /* | |
1902 | * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number | |
1903 | * of loops reaches 40 times or a timeout of 150ms occurs. | |
1904 | */ | |
1905 | timeout = 150; | |
1906 | do { | |
1907 | struct mmc_command cmd = {0}; | |
66fd8ad5 | 1908 | struct mmc_request mrq = {NULL}; |
b513ea25 AN |
1909 | |
1910 | if (!tuning_loop_counter && !timeout) | |
1911 | break; | |
1912 | ||
069c9f14 | 1913 | cmd.opcode = opcode; |
b513ea25 AN |
1914 | cmd.arg = 0; |
1915 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
1916 | cmd.retries = 0; | |
1917 | cmd.data = NULL; | |
1918 | cmd.error = 0; | |
1919 | ||
1920 | mrq.cmd = &cmd; | |
1921 | host->mrq = &mrq; | |
1922 | ||
1923 | /* | |
1924 | * In response to CMD19, the card sends 64 bytes of tuning | |
1925 | * block to the Host Controller. So we set the block size | |
1926 | * to 64 here. | |
1927 | */ | |
069c9f14 G |
1928 | if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200) { |
1929 | if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) | |
1930 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128), | |
1931 | SDHCI_BLOCK_SIZE); | |
1932 | else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) | |
1933 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), | |
1934 | SDHCI_BLOCK_SIZE); | |
1935 | } else { | |
1936 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), | |
1937 | SDHCI_BLOCK_SIZE); | |
1938 | } | |
b513ea25 AN |
1939 | |
1940 | /* | |
1941 | * The tuning block is sent by the card to the host controller. | |
1942 | * So we set the TRNS_READ bit in the Transfer Mode register. | |
1943 | * This also takes care of setting DMA Enable and Multi Block | |
1944 | * Select in the same register to 0. | |
1945 | */ | |
1946 | sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); | |
1947 | ||
1948 | sdhci_send_command(host, &cmd); | |
1949 | ||
1950 | host->cmd = NULL; | |
1951 | host->mrq = NULL; | |
1952 | ||
1953 | spin_unlock(&host->lock); | |
1954 | enable_irq(host->irq); | |
1955 | ||
1956 | /* Wait for Buffer Read Ready interrupt */ | |
1957 | wait_event_interruptible_timeout(host->buf_ready_int, | |
1958 | (host->tuning_done == 1), | |
1959 | msecs_to_jiffies(50)); | |
1960 | disable_irq(host->irq); | |
1961 | spin_lock(&host->lock); | |
1962 | ||
1963 | if (!host->tuning_done) { | |
a3c76eb9 | 1964 | pr_info(DRIVER_NAME ": Timeout waiting for " |
b513ea25 AN |
1965 | "Buffer Read Ready interrupt during tuning " |
1966 | "procedure, falling back to fixed sampling " | |
1967 | "clock\n"); | |
1968 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1969 | ctrl &= ~SDHCI_CTRL_TUNED_CLK; | |
1970 | ctrl &= ~SDHCI_CTRL_EXEC_TUNING; | |
1971 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1972 | ||
1973 | err = -EIO; | |
1974 | goto out; | |
1975 | } | |
1976 | ||
1977 | host->tuning_done = 0; | |
1978 | ||
1979 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1980 | tuning_loop_counter--; | |
1981 | timeout--; | |
1982 | mdelay(1); | |
1983 | } while (ctrl & SDHCI_CTRL_EXEC_TUNING); | |
1984 | ||
1985 | /* | |
1986 | * The Host Driver has exhausted the maximum number of loops allowed, | |
1987 | * so use fixed sampling frequency. | |
1988 | */ | |
1989 | if (!tuning_loop_counter || !timeout) { | |
1990 | ctrl &= ~SDHCI_CTRL_TUNED_CLK; | |
1991 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1992 | } else { | |
1993 | if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { | |
a3c76eb9 | 1994 | pr_info(DRIVER_NAME ": Tuning procedure" |
b513ea25 AN |
1995 | " failed, falling back to fixed sampling" |
1996 | " clock\n"); | |
1997 | err = -EIO; | |
1998 | } | |
1999 | } | |
2000 | ||
2001 | out: | |
cf2b5eea AN |
2002 | /* |
2003 | * If this is the very first time we are here, we start the retuning | |
2004 | * timer. Since only during the first time, SDHCI_NEEDS_RETUNING | |
2005 | * flag won't be set, we check this condition before actually starting | |
2006 | * the timer. | |
2007 | */ | |
2008 | if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count && | |
2009 | (host->tuning_mode == SDHCI_TUNING_MODE_1)) { | |
973905fe | 2010 | host->flags |= SDHCI_USING_RETUNING_TIMER; |
cf2b5eea AN |
2011 | mod_timer(&host->tuning_timer, jiffies + |
2012 | host->tuning_count * HZ); | |
2013 | /* Tuning mode 1 limits the maximum data length to 4MB */ | |
2014 | mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size; | |
2015 | } else { | |
2016 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
2017 | /* Reload the new initial value for timer */ | |
2018 | if (host->tuning_mode == SDHCI_TUNING_MODE_1) | |
2019 | mod_timer(&host->tuning_timer, jiffies + | |
2020 | host->tuning_count * HZ); | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | * In case tuning fails, host controllers which support re-tuning can | |
2025 | * try tuning again at a later time, when the re-tuning timer expires. | |
2026 | * So for these controllers, we return 0. Since there might be other | |
2027 | * controllers who do not have this capability, we return error for | |
973905fe AL |
2028 | * them. SDHCI_USING_RETUNING_TIMER means the host is currently using |
2029 | * a retuning timer to do the retuning for the card. | |
cf2b5eea | 2030 | */ |
973905fe | 2031 | if (err && (host->flags & SDHCI_USING_RETUNING_TIMER)) |
cf2b5eea AN |
2032 | err = 0; |
2033 | ||
b513ea25 AN |
2034 | sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier); |
2035 | spin_unlock(&host->lock); | |
2036 | enable_irq(host->irq); | |
66fd8ad5 | 2037 | sdhci_runtime_pm_put(host); |
b513ea25 AN |
2038 | |
2039 | return err; | |
2040 | } | |
2041 | ||
52983382 KL |
2042 | |
2043 | static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable) | |
4d55c5a1 | 2044 | { |
4d55c5a1 | 2045 | u16 ctrl; |
4d55c5a1 | 2046 | |
4d55c5a1 AN |
2047 | /* Host Controller v3.00 defines preset value registers */ |
2048 | if (host->version < SDHCI_SPEC_300) | |
2049 | return; | |
2050 | ||
4d55c5a1 AN |
2051 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
2052 | ||
2053 | /* | |
2054 | * We only enable or disable Preset Value if they are not already | |
2055 | * enabled or disabled respectively. Otherwise, we bail out. | |
2056 | */ | |
2057 | if (enable && !(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { | |
2058 | ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE; | |
2059 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
66fd8ad5 | 2060 | host->flags |= SDHCI_PV_ENABLED; |
4d55c5a1 AN |
2061 | } else if (!enable && (ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { |
2062 | ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; | |
2063 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
66fd8ad5 | 2064 | host->flags &= ~SDHCI_PV_ENABLED; |
4d55c5a1 | 2065 | } |
66fd8ad5 AH |
2066 | } |
2067 | ||
71e69211 | 2068 | static void sdhci_card_event(struct mmc_host *mmc) |
d129bceb | 2069 | { |
71e69211 | 2070 | struct sdhci_host *host = mmc_priv(mmc); |
d129bceb PO |
2071 | unsigned long flags; |
2072 | ||
722e1280 CD |
2073 | /* First check if client has provided their own card event */ |
2074 | if (host->ops->card_event) | |
2075 | host->ops->card_event(host); | |
2076 | ||
d129bceb PO |
2077 | spin_lock_irqsave(&host->lock, flags); |
2078 | ||
66fd8ad5 | 2079 | /* Check host->mrq first in case we are runtime suspended */ |
9668d765 | 2080 | if (host->mrq && !sdhci_do_get_cd(host)) { |
a3c76eb9 | 2081 | pr_err("%s: Card removed during transfer!\n", |
66fd8ad5 | 2082 | mmc_hostname(host->mmc)); |
a3c76eb9 | 2083 | pr_err("%s: Resetting controller.\n", |
66fd8ad5 | 2084 | mmc_hostname(host->mmc)); |
d129bceb | 2085 | |
66fd8ad5 AH |
2086 | sdhci_reset(host, SDHCI_RESET_CMD); |
2087 | sdhci_reset(host, SDHCI_RESET_DATA); | |
d129bceb | 2088 | |
66fd8ad5 AH |
2089 | host->mrq->cmd->error = -ENOMEDIUM; |
2090 | tasklet_schedule(&host->finish_tasklet); | |
d129bceb PO |
2091 | } |
2092 | ||
2093 | spin_unlock_irqrestore(&host->lock, flags); | |
71e69211 GL |
2094 | } |
2095 | ||
2096 | static const struct mmc_host_ops sdhci_ops = { | |
2097 | .request = sdhci_request, | |
2098 | .set_ios = sdhci_set_ios, | |
94144a46 | 2099 | .get_cd = sdhci_get_cd, |
71e69211 GL |
2100 | .get_ro = sdhci_get_ro, |
2101 | .hw_reset = sdhci_hw_reset, | |
2102 | .enable_sdio_irq = sdhci_enable_sdio_irq, | |
2103 | .start_signal_voltage_switch = sdhci_start_signal_voltage_switch, | |
2104 | .execute_tuning = sdhci_execute_tuning, | |
71e69211 | 2105 | .card_event = sdhci_card_event, |
20b92a30 | 2106 | .card_busy = sdhci_card_busy, |
71e69211 GL |
2107 | }; |
2108 | ||
2109 | /*****************************************************************************\ | |
2110 | * * | |
2111 | * Tasklets * | |
2112 | * * | |
2113 | \*****************************************************************************/ | |
2114 | ||
2115 | static void sdhci_tasklet_card(unsigned long param) | |
2116 | { | |
2117 | struct sdhci_host *host = (struct sdhci_host*)param; | |
2118 | ||
2119 | sdhci_card_event(host->mmc); | |
d129bceb | 2120 | |
04cf585d | 2121 | mmc_detect_change(host->mmc, msecs_to_jiffies(200)); |
d129bceb PO |
2122 | } |
2123 | ||
2124 | static void sdhci_tasklet_finish(unsigned long param) | |
2125 | { | |
2126 | struct sdhci_host *host; | |
2127 | unsigned long flags; | |
2128 | struct mmc_request *mrq; | |
2129 | ||
2130 | host = (struct sdhci_host*)param; | |
2131 | ||
66fd8ad5 AH |
2132 | spin_lock_irqsave(&host->lock, flags); |
2133 | ||
0c9c99a7 CB |
2134 | /* |
2135 | * If this tasklet gets rescheduled while running, it will | |
2136 | * be run again afterwards but without any active request. | |
2137 | */ | |
66fd8ad5 AH |
2138 | if (!host->mrq) { |
2139 | spin_unlock_irqrestore(&host->lock, flags); | |
0c9c99a7 | 2140 | return; |
66fd8ad5 | 2141 | } |
d129bceb PO |
2142 | |
2143 | del_timer(&host->timer); | |
2144 | ||
2145 | mrq = host->mrq; | |
2146 | ||
d129bceb PO |
2147 | /* |
2148 | * The controller needs a reset of internal state machines | |
2149 | * upon error conditions. | |
2150 | */ | |
1e72859e | 2151 | if (!(host->flags & SDHCI_DEVICE_DEAD) && |
b7b4d342 | 2152 | ((mrq->cmd && mrq->cmd->error) || |
1e72859e PO |
2153 | (mrq->data && (mrq->data->error || |
2154 | (mrq->data->stop && mrq->data->stop->error))) || | |
2155 | (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { | |
645289dc PO |
2156 | |
2157 | /* Some controllers need this kick or reset won't work here */ | |
8213af3b | 2158 | if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) |
645289dc | 2159 | /* This is to force an update */ |
8213af3b | 2160 | sdhci_update_clock(host); |
645289dc PO |
2161 | |
2162 | /* Spec says we should do both at the same time, but Ricoh | |
2163 | controllers do not like that. */ | |
d129bceb PO |
2164 | sdhci_reset(host, SDHCI_RESET_CMD); |
2165 | sdhci_reset(host, SDHCI_RESET_DATA); | |
2166 | } | |
2167 | ||
2168 | host->mrq = NULL; | |
2169 | host->cmd = NULL; | |
2170 | host->data = NULL; | |
2171 | ||
f9134319 | 2172 | #ifndef SDHCI_USE_LEDS_CLASS |
d129bceb | 2173 | sdhci_deactivate_led(host); |
2f730fec | 2174 | #endif |
d129bceb | 2175 | |
5f25a66f | 2176 | mmiowb(); |
d129bceb PO |
2177 | spin_unlock_irqrestore(&host->lock, flags); |
2178 | ||
2179 | mmc_request_done(host->mmc, mrq); | |
66fd8ad5 | 2180 | sdhci_runtime_pm_put(host); |
d129bceb PO |
2181 | } |
2182 | ||
2183 | static void sdhci_timeout_timer(unsigned long data) | |
2184 | { | |
2185 | struct sdhci_host *host; | |
2186 | unsigned long flags; | |
2187 | ||
2188 | host = (struct sdhci_host*)data; | |
2189 | ||
2190 | spin_lock_irqsave(&host->lock, flags); | |
2191 | ||
2192 | if (host->mrq) { | |
a3c76eb9 | 2193 | pr_err("%s: Timeout waiting for hardware " |
acf1da45 | 2194 | "interrupt.\n", mmc_hostname(host->mmc)); |
d129bceb PO |
2195 | sdhci_dumpregs(host); |
2196 | ||
2197 | if (host->data) { | |
17b0429d | 2198 | host->data->error = -ETIMEDOUT; |
d129bceb PO |
2199 | sdhci_finish_data(host); |
2200 | } else { | |
2201 | if (host->cmd) | |
17b0429d | 2202 | host->cmd->error = -ETIMEDOUT; |
d129bceb | 2203 | else |
17b0429d | 2204 | host->mrq->cmd->error = -ETIMEDOUT; |
d129bceb PO |
2205 | |
2206 | tasklet_schedule(&host->finish_tasklet); | |
2207 | } | |
2208 | } | |
2209 | ||
5f25a66f | 2210 | mmiowb(); |
d129bceb PO |
2211 | spin_unlock_irqrestore(&host->lock, flags); |
2212 | } | |
2213 | ||
cf2b5eea AN |
2214 | static void sdhci_tuning_timer(unsigned long data) |
2215 | { | |
2216 | struct sdhci_host *host; | |
2217 | unsigned long flags; | |
2218 | ||
2219 | host = (struct sdhci_host *)data; | |
2220 | ||
2221 | spin_lock_irqsave(&host->lock, flags); | |
2222 | ||
2223 | host->flags |= SDHCI_NEEDS_RETUNING; | |
2224 | ||
2225 | spin_unlock_irqrestore(&host->lock, flags); | |
2226 | } | |
2227 | ||
d129bceb PO |
2228 | /*****************************************************************************\ |
2229 | * * | |
2230 | * Interrupt handling * | |
2231 | * * | |
2232 | \*****************************************************************************/ | |
2233 | ||
2234 | static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) | |
2235 | { | |
2236 | BUG_ON(intmask == 0); | |
2237 | ||
2238 | if (!host->cmd) { | |
a3c76eb9 | 2239 | pr_err("%s: Got command interrupt 0x%08x even " |
b67ac3f3 PO |
2240 | "though no command operation was in progress.\n", |
2241 | mmc_hostname(host->mmc), (unsigned)intmask); | |
d129bceb PO |
2242 | sdhci_dumpregs(host); |
2243 | return; | |
2244 | } | |
2245 | ||
43b58b36 | 2246 | if (intmask & SDHCI_INT_TIMEOUT) |
17b0429d PO |
2247 | host->cmd->error = -ETIMEDOUT; |
2248 | else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT | | |
2249 | SDHCI_INT_INDEX)) | |
2250 | host->cmd->error = -EILSEQ; | |
43b58b36 | 2251 | |
e809517f | 2252 | if (host->cmd->error) { |
d129bceb | 2253 | tasklet_schedule(&host->finish_tasklet); |
e809517f PO |
2254 | return; |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * The host can send and interrupt when the busy state has | |
2259 | * ended, allowing us to wait without wasting CPU cycles. | |
2260 | * Unfortunately this is overloaded on the "data complete" | |
2261 | * interrupt, so we need to take some care when handling | |
2262 | * it. | |
2263 | * | |
2264 | * Note: The 1.0 specification is a bit ambiguous about this | |
2265 | * feature so there might be some problems with older | |
2266 | * controllers. | |
2267 | */ | |
2268 | if (host->cmd->flags & MMC_RSP_BUSY) { | |
2269 | if (host->cmd->data) | |
2270 | DBG("Cannot wait for busy signal when also " | |
2271 | "doing a data transfer"); | |
f945405c | 2272 | else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ)) |
e809517f | 2273 | return; |
f945405c BD |
2274 | |
2275 | /* The controller does not support the end-of-busy IRQ, | |
2276 | * fall through and take the SDHCI_INT_RESPONSE */ | |
e809517f PO |
2277 | } |
2278 | ||
2279 | if (intmask & SDHCI_INT_RESPONSE) | |
43b58b36 | 2280 | sdhci_finish_command(host); |
d129bceb PO |
2281 | } |
2282 | ||
0957c333 | 2283 | #ifdef CONFIG_MMC_DEBUG |
6882a8c0 BD |
2284 | static void sdhci_show_adma_error(struct sdhci_host *host) |
2285 | { | |
2286 | const char *name = mmc_hostname(host->mmc); | |
2287 | u8 *desc = host->adma_desc; | |
2288 | __le32 *dma; | |
2289 | __le16 *len; | |
2290 | u8 attr; | |
2291 | ||
2292 | sdhci_dumpregs(host); | |
2293 | ||
2294 | while (true) { | |
2295 | dma = (__le32 *)(desc + 4); | |
2296 | len = (__le16 *)(desc + 2); | |
2297 | attr = *desc; | |
2298 | ||
2299 | DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", | |
2300 | name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr); | |
2301 | ||
2302 | desc += 8; | |
2303 | ||
2304 | if (attr & 2) | |
2305 | break; | |
2306 | } | |
2307 | } | |
2308 | #else | |
2309 | static void sdhci_show_adma_error(struct sdhci_host *host) { } | |
2310 | #endif | |
2311 | ||
d129bceb PO |
2312 | static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) |
2313 | { | |
069c9f14 | 2314 | u32 command; |
d129bceb PO |
2315 | BUG_ON(intmask == 0); |
2316 | ||
b513ea25 AN |
2317 | /* CMD19 generates _only_ Buffer Read Ready interrupt */ |
2318 | if (intmask & SDHCI_INT_DATA_AVAIL) { | |
069c9f14 G |
2319 | command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)); |
2320 | if (command == MMC_SEND_TUNING_BLOCK || | |
2321 | command == MMC_SEND_TUNING_BLOCK_HS200) { | |
b513ea25 AN |
2322 | host->tuning_done = 1; |
2323 | wake_up(&host->buf_ready_int); | |
2324 | return; | |
2325 | } | |
2326 | } | |
2327 | ||
d129bceb PO |
2328 | if (!host->data) { |
2329 | /* | |
e809517f PO |
2330 | * The "data complete" interrupt is also used to |
2331 | * indicate that a busy state has ended. See comment | |
2332 | * above in sdhci_cmd_irq(). | |
d129bceb | 2333 | */ |
e809517f PO |
2334 | if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) { |
2335 | if (intmask & SDHCI_INT_DATA_END) { | |
2336 | sdhci_finish_command(host); | |
2337 | return; | |
2338 | } | |
2339 | } | |
d129bceb | 2340 | |
a3c76eb9 | 2341 | pr_err("%s: Got data interrupt 0x%08x even " |
b67ac3f3 PO |
2342 | "though no data operation was in progress.\n", |
2343 | mmc_hostname(host->mmc), (unsigned)intmask); | |
d129bceb PO |
2344 | sdhci_dumpregs(host); |
2345 | ||
2346 | return; | |
2347 | } | |
2348 | ||
2349 | if (intmask & SDHCI_INT_DATA_TIMEOUT) | |
17b0429d | 2350 | host->data->error = -ETIMEDOUT; |
22113efd AL |
2351 | else if (intmask & SDHCI_INT_DATA_END_BIT) |
2352 | host->data->error = -EILSEQ; | |
2353 | else if ((intmask & SDHCI_INT_DATA_CRC) && | |
2354 | SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) | |
2355 | != MMC_BUS_TEST_R) | |
17b0429d | 2356 | host->data->error = -EILSEQ; |
6882a8c0 | 2357 | else if (intmask & SDHCI_INT_ADMA_ERROR) { |
a3c76eb9 | 2358 | pr_err("%s: ADMA error\n", mmc_hostname(host->mmc)); |
6882a8c0 | 2359 | sdhci_show_adma_error(host); |
2134a922 | 2360 | host->data->error = -EIO; |
a4071fbb HZ |
2361 | if (host->ops->adma_workaround) |
2362 | host->ops->adma_workaround(host, intmask); | |
6882a8c0 | 2363 | } |
d129bceb | 2364 | |
17b0429d | 2365 | if (host->data->error) |
d129bceb PO |
2366 | sdhci_finish_data(host); |
2367 | else { | |
a406f5a3 | 2368 | if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) |
d129bceb PO |
2369 | sdhci_transfer_pio(host); |
2370 | ||
6ba736a1 PO |
2371 | /* |
2372 | * We currently don't do anything fancy with DMA | |
2373 | * boundaries, but as we can't disable the feature | |
2374 | * we need to at least restart the transfer. | |
f6a03cbf MV |
2375 | * |
2376 | * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS) | |
2377 | * should return a valid address to continue from, but as | |
2378 | * some controllers are faulty, don't trust them. | |
6ba736a1 | 2379 | */ |
f6a03cbf MV |
2380 | if (intmask & SDHCI_INT_DMA_END) { |
2381 | u32 dmastart, dmanow; | |
2382 | dmastart = sg_dma_address(host->data->sg); | |
2383 | dmanow = dmastart + host->data->bytes_xfered; | |
2384 | /* | |
2385 | * Force update to the next DMA block boundary. | |
2386 | */ | |
2387 | dmanow = (dmanow & | |
2388 | ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) + | |
2389 | SDHCI_DEFAULT_BOUNDARY_SIZE; | |
2390 | host->data->bytes_xfered = dmanow - dmastart; | |
2391 | DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes," | |
2392 | " next 0x%08x\n", | |
2393 | mmc_hostname(host->mmc), dmastart, | |
2394 | host->data->bytes_xfered, dmanow); | |
2395 | sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS); | |
2396 | } | |
6ba736a1 | 2397 | |
e538fbe8 PO |
2398 | if (intmask & SDHCI_INT_DATA_END) { |
2399 | if (host->cmd) { | |
2400 | /* | |
2401 | * Data managed to finish before the | |
2402 | * command completed. Make sure we do | |
2403 | * things in the proper order. | |
2404 | */ | |
2405 | host->data_early = 1; | |
2406 | } else { | |
2407 | sdhci_finish_data(host); | |
2408 | } | |
2409 | } | |
d129bceb PO |
2410 | } |
2411 | } | |
2412 | ||
7d12e780 | 2413 | static irqreturn_t sdhci_irq(int irq, void *dev_id) |
d129bceb PO |
2414 | { |
2415 | irqreturn_t result; | |
66fd8ad5 | 2416 | struct sdhci_host *host = dev_id; |
6379b237 AS |
2417 | u32 intmask, unexpected = 0; |
2418 | int cardint = 0, max_loops = 16; | |
d129bceb PO |
2419 | |
2420 | spin_lock(&host->lock); | |
2421 | ||
66fd8ad5 AH |
2422 | if (host->runtime_suspended) { |
2423 | spin_unlock(&host->lock); | |
a3c76eb9 | 2424 | pr_warning("%s: got irq while runtime suspended\n", |
66fd8ad5 AH |
2425 | mmc_hostname(host->mmc)); |
2426 | return IRQ_HANDLED; | |
2427 | } | |
2428 | ||
4e4141a5 | 2429 | intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
d129bceb | 2430 | |
62df67a5 | 2431 | if (!intmask || intmask == 0xffffffff) { |
d129bceb PO |
2432 | result = IRQ_NONE; |
2433 | goto out; | |
2434 | } | |
2435 | ||
6379b237 | 2436 | again: |
b69c9058 PO |
2437 | DBG("*** %s got interrupt: 0x%08x\n", |
2438 | mmc_hostname(host->mmc), intmask); | |
d129bceb | 2439 | |
3192a28f | 2440 | if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { |
d25928d1 SG |
2441 | u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
2442 | SDHCI_CARD_PRESENT; | |
2443 | ||
2444 | /* | |
2445 | * There is a observation on i.mx esdhc. INSERT bit will be | |
2446 | * immediately set again when it gets cleared, if a card is | |
2447 | * inserted. We have to mask the irq to prevent interrupt | |
2448 | * storm which will freeze the system. And the REMOVE gets | |
2449 | * the same situation. | |
2450 | * | |
2451 | * More testing are needed here to ensure it works for other | |
2452 | * platforms though. | |
2453 | */ | |
2454 | sdhci_mask_irqs(host, present ? SDHCI_INT_CARD_INSERT : | |
2455 | SDHCI_INT_CARD_REMOVE); | |
2456 | sdhci_unmask_irqs(host, present ? SDHCI_INT_CARD_REMOVE : | |
2457 | SDHCI_INT_CARD_INSERT); | |
2458 | ||
4e4141a5 | 2459 | sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT | |
d25928d1 SG |
2460 | SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS); |
2461 | intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); | |
d129bceb | 2462 | tasklet_schedule(&host->card_tasklet); |
3192a28f | 2463 | } |
d129bceb | 2464 | |
3192a28f | 2465 | if (intmask & SDHCI_INT_CMD_MASK) { |
4e4141a5 AV |
2466 | sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK, |
2467 | SDHCI_INT_STATUS); | |
3192a28f | 2468 | sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK); |
d129bceb PO |
2469 | } |
2470 | ||
2471 | if (intmask & SDHCI_INT_DATA_MASK) { | |
4e4141a5 AV |
2472 | sdhci_writel(host, intmask & SDHCI_INT_DATA_MASK, |
2473 | SDHCI_INT_STATUS); | |
3192a28f | 2474 | sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK); |
d129bceb PO |
2475 | } |
2476 | ||
2477 | intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK); | |
2478 | ||
964f9ce2 PO |
2479 | intmask &= ~SDHCI_INT_ERROR; |
2480 | ||
d129bceb | 2481 | if (intmask & SDHCI_INT_BUS_POWER) { |
a3c76eb9 | 2482 | pr_err("%s: Card is consuming too much power!\n", |
d129bceb | 2483 | mmc_hostname(host->mmc)); |
4e4141a5 | 2484 | sdhci_writel(host, SDHCI_INT_BUS_POWER, SDHCI_INT_STATUS); |
d129bceb PO |
2485 | } |
2486 | ||
9d26a5d3 | 2487 | intmask &= ~SDHCI_INT_BUS_POWER; |
3192a28f | 2488 | |
f75979b7 PO |
2489 | if (intmask & SDHCI_INT_CARD_INT) |
2490 | cardint = 1; | |
2491 | ||
2492 | intmask &= ~SDHCI_INT_CARD_INT; | |
2493 | ||
3192a28f | 2494 | if (intmask) { |
6379b237 | 2495 | unexpected |= intmask; |
4e4141a5 | 2496 | sdhci_writel(host, intmask, SDHCI_INT_STATUS); |
3192a28f | 2497 | } |
d129bceb PO |
2498 | |
2499 | result = IRQ_HANDLED; | |
2500 | ||
6379b237 AS |
2501 | intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
2502 | if (intmask && --max_loops) | |
2503 | goto again; | |
d129bceb PO |
2504 | out: |
2505 | spin_unlock(&host->lock); | |
2506 | ||
6379b237 AS |
2507 | if (unexpected) { |
2508 | pr_err("%s: Unexpected interrupt 0x%08x.\n", | |
2509 | mmc_hostname(host->mmc), unexpected); | |
2510 | sdhci_dumpregs(host); | |
2511 | } | |
f75979b7 PO |
2512 | /* |
2513 | * We have to delay this as it calls back into the driver. | |
2514 | */ | |
2515 | if (cardint) | |
2516 | mmc_signal_sdio_irq(host->mmc); | |
2517 | ||
d129bceb PO |
2518 | return result; |
2519 | } | |
2520 | ||
2521 | /*****************************************************************************\ | |
2522 | * * | |
2523 | * Suspend/resume * | |
2524 | * * | |
2525 | \*****************************************************************************/ | |
2526 | ||
2527 | #ifdef CONFIG_PM | |
ad080d79 KL |
2528 | void sdhci_enable_irq_wakeups(struct sdhci_host *host) |
2529 | { | |
2530 | u8 val; | |
2531 | u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE | |
2532 | | SDHCI_WAKE_ON_INT; | |
2533 | ||
2534 | val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); | |
2535 | val |= mask ; | |
2536 | /* Avoid fake wake up */ | |
2537 | if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) | |
2538 | val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE); | |
2539 | sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); | |
2540 | } | |
2541 | EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups); | |
2542 | ||
2543 | void sdhci_disable_irq_wakeups(struct sdhci_host *host) | |
2544 | { | |
2545 | u8 val; | |
2546 | u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE | |
2547 | | SDHCI_WAKE_ON_INT; | |
2548 | ||
2549 | val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); | |
2550 | val &= ~mask; | |
2551 | sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); | |
2552 | } | |
2553 | EXPORT_SYMBOL_GPL(sdhci_disable_irq_wakeups); | |
d129bceb | 2554 | |
29495aa0 | 2555 | int sdhci_suspend_host(struct sdhci_host *host) |
d129bceb | 2556 | { |
b8c86fc5 | 2557 | int ret; |
a715dfc7 | 2558 | |
a1b13b4e CB |
2559 | if (host->ops->platform_suspend) |
2560 | host->ops->platform_suspend(host); | |
2561 | ||
7260cf5e AV |
2562 | sdhci_disable_card_detection(host); |
2563 | ||
cf2b5eea | 2564 | /* Disable tuning since we are suspending */ |
973905fe | 2565 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
c6ced0db | 2566 | del_timer_sync(&host->tuning_timer); |
cf2b5eea | 2567 | host->flags &= ~SDHCI_NEEDS_RETUNING; |
cf2b5eea AN |
2568 | } |
2569 | ||
1a13f8fa | 2570 | ret = mmc_suspend_host(host->mmc); |
38a60ea2 | 2571 | if (ret) { |
973905fe | 2572 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
38a60ea2 AL |
2573 | host->flags |= SDHCI_NEEDS_RETUNING; |
2574 | mod_timer(&host->tuning_timer, jiffies + | |
2575 | host->tuning_count * HZ); | |
2576 | } | |
2577 | ||
2578 | sdhci_enable_card_detection(host); | |
2579 | ||
b8c86fc5 | 2580 | return ret; |
38a60ea2 | 2581 | } |
a715dfc7 | 2582 | |
ad080d79 KL |
2583 | if (!device_may_wakeup(mmc_dev(host->mmc))) { |
2584 | sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); | |
2585 | free_irq(host->irq, host); | |
2586 | } else { | |
2587 | sdhci_enable_irq_wakeups(host); | |
2588 | enable_irq_wake(host->irq); | |
2589 | } | |
9bea3c85 | 2590 | return ret; |
d129bceb PO |
2591 | } |
2592 | ||
b8c86fc5 | 2593 | EXPORT_SYMBOL_GPL(sdhci_suspend_host); |
d129bceb | 2594 | |
b8c86fc5 PO |
2595 | int sdhci_resume_host(struct sdhci_host *host) |
2596 | { | |
2597 | int ret; | |
d129bceb | 2598 | |
a13abc7b | 2599 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
b8c86fc5 PO |
2600 | if (host->ops->enable_dma) |
2601 | host->ops->enable_dma(host); | |
2602 | } | |
d129bceb | 2603 | |
ad080d79 KL |
2604 | if (!device_may_wakeup(mmc_dev(host->mmc))) { |
2605 | ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, | |
2606 | mmc_hostname(host->mmc), host); | |
2607 | if (ret) | |
2608 | return ret; | |
2609 | } else { | |
2610 | sdhci_disable_irq_wakeups(host); | |
2611 | disable_irq_wake(host->irq); | |
2612 | } | |
d129bceb | 2613 | |
6308d290 AH |
2614 | if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) && |
2615 | (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) { | |
2616 | /* Card keeps power but host controller does not */ | |
2617 | sdhci_init(host, 0); | |
2618 | host->pwr = 0; | |
2619 | host->clock = 0; | |
2620 | sdhci_do_set_ios(host, &host->mmc->ios); | |
2621 | } else { | |
2622 | sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER)); | |
2623 | mmiowb(); | |
2624 | } | |
b8c86fc5 PO |
2625 | |
2626 | ret = mmc_resume_host(host->mmc); | |
7260cf5e AV |
2627 | sdhci_enable_card_detection(host); |
2628 | ||
a1b13b4e CB |
2629 | if (host->ops->platform_resume) |
2630 | host->ops->platform_resume(host); | |
2631 | ||
cf2b5eea | 2632 | /* Set the re-tuning expiration flag */ |
973905fe | 2633 | if (host->flags & SDHCI_USING_RETUNING_TIMER) |
cf2b5eea AN |
2634 | host->flags |= SDHCI_NEEDS_RETUNING; |
2635 | ||
2f4cbb3d | 2636 | return ret; |
d129bceb PO |
2637 | } |
2638 | ||
b8c86fc5 | 2639 | EXPORT_SYMBOL_GPL(sdhci_resume_host); |
d129bceb PO |
2640 | #endif /* CONFIG_PM */ |
2641 | ||
66fd8ad5 AH |
2642 | #ifdef CONFIG_PM_RUNTIME |
2643 | ||
2644 | static int sdhci_runtime_pm_get(struct sdhci_host *host) | |
2645 | { | |
2646 | return pm_runtime_get_sync(host->mmc->parent); | |
2647 | } | |
2648 | ||
2649 | static int sdhci_runtime_pm_put(struct sdhci_host *host) | |
2650 | { | |
2651 | pm_runtime_mark_last_busy(host->mmc->parent); | |
2652 | return pm_runtime_put_autosuspend(host->mmc->parent); | |
2653 | } | |
2654 | ||
f0710a55 AH |
2655 | static void sdhci_runtime_pm_bus_on(struct sdhci_host *host) |
2656 | { | |
2657 | if (host->runtime_suspended || host->bus_on) | |
2658 | return; | |
2659 | host->bus_on = true; | |
2660 | pm_runtime_get_noresume(host->mmc->parent); | |
2661 | } | |
2662 | ||
2663 | static void sdhci_runtime_pm_bus_off(struct sdhci_host *host) | |
2664 | { | |
2665 | if (host->runtime_suspended || !host->bus_on) | |
2666 | return; | |
2667 | host->bus_on = false; | |
2668 | pm_runtime_put_noidle(host->mmc->parent); | |
2669 | } | |
2670 | ||
66fd8ad5 AH |
2671 | int sdhci_runtime_suspend_host(struct sdhci_host *host) |
2672 | { | |
2673 | unsigned long flags; | |
2674 | int ret = 0; | |
2675 | ||
2676 | /* Disable tuning since we are suspending */ | |
973905fe | 2677 | if (host->flags & SDHCI_USING_RETUNING_TIMER) { |
66fd8ad5 AH |
2678 | del_timer_sync(&host->tuning_timer); |
2679 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
2680 | } | |
2681 | ||
2682 | spin_lock_irqsave(&host->lock, flags); | |
2683 | sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); | |
2684 | spin_unlock_irqrestore(&host->lock, flags); | |
2685 | ||
2686 | synchronize_irq(host->irq); | |
2687 | ||
2688 | spin_lock_irqsave(&host->lock, flags); | |
2689 | host->runtime_suspended = true; | |
2690 | spin_unlock_irqrestore(&host->lock, flags); | |
2691 | ||
2692 | return ret; | |
2693 | } | |
2694 | EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host); | |
2695 | ||
2696 | int sdhci_runtime_resume_host(struct sdhci_host *host) | |
2697 | { | |
2698 | unsigned long flags; | |
2699 | int ret = 0, host_flags = host->flags; | |
2700 | ||
2701 | if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { | |
2702 | if (host->ops->enable_dma) | |
2703 | host->ops->enable_dma(host); | |
2704 | } | |
2705 | ||
2706 | sdhci_init(host, 0); | |
2707 | ||
2708 | /* Force clock and power re-program */ | |
2709 | host->pwr = 0; | |
2710 | host->clock = 0; | |
2711 | sdhci_do_set_ios(host, &host->mmc->ios); | |
2712 | ||
2713 | sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios); | |
52983382 KL |
2714 | if ((host_flags & SDHCI_PV_ENABLED) && |
2715 | !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) { | |
2716 | spin_lock_irqsave(&host->lock, flags); | |
2717 | sdhci_enable_preset_value(host, true); | |
2718 | spin_unlock_irqrestore(&host->lock, flags); | |
2719 | } | |
66fd8ad5 AH |
2720 | |
2721 | /* Set the re-tuning expiration flag */ | |
973905fe | 2722 | if (host->flags & SDHCI_USING_RETUNING_TIMER) |
66fd8ad5 AH |
2723 | host->flags |= SDHCI_NEEDS_RETUNING; |
2724 | ||
2725 | spin_lock_irqsave(&host->lock, flags); | |
2726 | ||
2727 | host->runtime_suspended = false; | |
2728 | ||
2729 | /* Enable SDIO IRQ */ | |
2730 | if ((host->flags & SDHCI_SDIO_IRQ_ENABLED)) | |
2731 | sdhci_enable_sdio_irq_nolock(host, true); | |
2732 | ||
2733 | /* Enable Card Detection */ | |
2734 | sdhci_enable_card_detection(host); | |
2735 | ||
2736 | spin_unlock_irqrestore(&host->lock, flags); | |
2737 | ||
2738 | return ret; | |
2739 | } | |
2740 | EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host); | |
2741 | ||
2742 | #endif | |
2743 | ||
d129bceb PO |
2744 | /*****************************************************************************\ |
2745 | * * | |
b8c86fc5 | 2746 | * Device allocation/registration * |
d129bceb PO |
2747 | * * |
2748 | \*****************************************************************************/ | |
2749 | ||
b8c86fc5 PO |
2750 | struct sdhci_host *sdhci_alloc_host(struct device *dev, |
2751 | size_t priv_size) | |
d129bceb | 2752 | { |
d129bceb PO |
2753 | struct mmc_host *mmc; |
2754 | struct sdhci_host *host; | |
2755 | ||
b8c86fc5 | 2756 | WARN_ON(dev == NULL); |
d129bceb | 2757 | |
b8c86fc5 | 2758 | mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev); |
d129bceb | 2759 | if (!mmc) |
b8c86fc5 | 2760 | return ERR_PTR(-ENOMEM); |
d129bceb PO |
2761 | |
2762 | host = mmc_priv(mmc); | |
2763 | host->mmc = mmc; | |
2764 | ||
b8c86fc5 PO |
2765 | return host; |
2766 | } | |
8a4da143 | 2767 | |
b8c86fc5 | 2768 | EXPORT_SYMBOL_GPL(sdhci_alloc_host); |
d129bceb | 2769 | |
b8c86fc5 PO |
2770 | int sdhci_add_host(struct sdhci_host *host) |
2771 | { | |
2772 | struct mmc_host *mmc; | |
bd6a8c30 | 2773 | u32 caps[2] = {0, 0}; |
f2119df6 AN |
2774 | u32 max_current_caps; |
2775 | unsigned int ocr_avail; | |
b8c86fc5 | 2776 | int ret; |
d129bceb | 2777 | |
b8c86fc5 PO |
2778 | WARN_ON(host == NULL); |
2779 | if (host == NULL) | |
2780 | return -EINVAL; | |
d129bceb | 2781 | |
b8c86fc5 | 2782 | mmc = host->mmc; |
d129bceb | 2783 | |
b8c86fc5 PO |
2784 | if (debug_quirks) |
2785 | host->quirks = debug_quirks; | |
66fd8ad5 AH |
2786 | if (debug_quirks2) |
2787 | host->quirks2 = debug_quirks2; | |
d129bceb | 2788 | |
d96649ed PO |
2789 | sdhci_reset(host, SDHCI_RESET_ALL); |
2790 | ||
4e4141a5 | 2791 | host->version = sdhci_readw(host, SDHCI_HOST_VERSION); |
2134a922 PO |
2792 | host->version = (host->version & SDHCI_SPEC_VER_MASK) |
2793 | >> SDHCI_SPEC_VER_SHIFT; | |
85105c53 | 2794 | if (host->version > SDHCI_SPEC_300) { |
a3c76eb9 | 2795 | pr_err("%s: Unknown controller version (%d). " |
b69c9058 | 2796 | "You may experience problems.\n", mmc_hostname(mmc), |
2134a922 | 2797 | host->version); |
4a965505 PO |
2798 | } |
2799 | ||
f2119df6 | 2800 | caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps : |
ccc92c23 | 2801 | sdhci_readl(host, SDHCI_CAPABILITIES); |
d129bceb | 2802 | |
bd6a8c30 PR |
2803 | if (host->version >= SDHCI_SPEC_300) |
2804 | caps[1] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? | |
2805 | host->caps1 : | |
2806 | sdhci_readl(host, SDHCI_CAPABILITIES_1); | |
f2119df6 | 2807 | |
b8c86fc5 | 2808 | if (host->quirks & SDHCI_QUIRK_FORCE_DMA) |
a13abc7b | 2809 | host->flags |= SDHCI_USE_SDMA; |
f2119df6 | 2810 | else if (!(caps[0] & SDHCI_CAN_DO_SDMA)) |
a13abc7b | 2811 | DBG("Controller doesn't have SDMA capability\n"); |
67435274 | 2812 | else |
a13abc7b | 2813 | host->flags |= SDHCI_USE_SDMA; |
d129bceb | 2814 | |
b8c86fc5 | 2815 | if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) && |
a13abc7b | 2816 | (host->flags & SDHCI_USE_SDMA)) { |
cee687ce | 2817 | DBG("Disabling DMA as it is marked broken\n"); |
a13abc7b | 2818 | host->flags &= ~SDHCI_USE_SDMA; |
7c168e3d FT |
2819 | } |
2820 | ||
f2119df6 AN |
2821 | if ((host->version >= SDHCI_SPEC_200) && |
2822 | (caps[0] & SDHCI_CAN_DO_ADMA2)) | |
a13abc7b | 2823 | host->flags |= SDHCI_USE_ADMA; |
2134a922 PO |
2824 | |
2825 | if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) && | |
2826 | (host->flags & SDHCI_USE_ADMA)) { | |
2827 | DBG("Disabling ADMA as it is marked broken\n"); | |
2828 | host->flags &= ~SDHCI_USE_ADMA; | |
2829 | } | |
2830 | ||
a13abc7b | 2831 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
b8c86fc5 PO |
2832 | if (host->ops->enable_dma) { |
2833 | if (host->ops->enable_dma(host)) { | |
a3c76eb9 | 2834 | pr_warning("%s: No suitable DMA " |
b8c86fc5 PO |
2835 | "available. Falling back to PIO.\n", |
2836 | mmc_hostname(mmc)); | |
a13abc7b RR |
2837 | host->flags &= |
2838 | ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA); | |
b8c86fc5 | 2839 | } |
d129bceb PO |
2840 | } |
2841 | } | |
2842 | ||
2134a922 PO |
2843 | if (host->flags & SDHCI_USE_ADMA) { |
2844 | /* | |
2845 | * We need to allocate descriptors for all sg entries | |
2846 | * (128) and potentially one alignment transfer for | |
2847 | * each of those entries. | |
2848 | */ | |
2849 | host->adma_desc = kmalloc((128 * 2 + 1) * 4, GFP_KERNEL); | |
2850 | host->align_buffer = kmalloc(128 * 4, GFP_KERNEL); | |
2851 | if (!host->adma_desc || !host->align_buffer) { | |
2852 | kfree(host->adma_desc); | |
2853 | kfree(host->align_buffer); | |
a3c76eb9 | 2854 | pr_warning("%s: Unable to allocate ADMA " |
2134a922 PO |
2855 | "buffers. Falling back to standard DMA.\n", |
2856 | mmc_hostname(mmc)); | |
2857 | host->flags &= ~SDHCI_USE_ADMA; | |
2858 | } | |
2859 | } | |
2860 | ||
7659150c PO |
2861 | /* |
2862 | * If we use DMA, then it's up to the caller to set the DMA | |
2863 | * mask, but PIO does not need the hw shim so we set a new | |
2864 | * mask here in that case. | |
2865 | */ | |
a13abc7b | 2866 | if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) { |
7659150c PO |
2867 | host->dma_mask = DMA_BIT_MASK(64); |
2868 | mmc_dev(host->mmc)->dma_mask = &host->dma_mask; | |
2869 | } | |
d129bceb | 2870 | |
c4687d5f | 2871 | if (host->version >= SDHCI_SPEC_300) |
f2119df6 | 2872 | host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK) |
c4687d5f ZG |
2873 | >> SDHCI_CLOCK_BASE_SHIFT; |
2874 | else | |
f2119df6 | 2875 | host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK) |
c4687d5f ZG |
2876 | >> SDHCI_CLOCK_BASE_SHIFT; |
2877 | ||
4240ff0a | 2878 | host->max_clk *= 1000000; |
f27f47ef AV |
2879 | if (host->max_clk == 0 || host->quirks & |
2880 | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) { | |
4240ff0a | 2881 | if (!host->ops->get_max_clock) { |
a3c76eb9 | 2882 | pr_err("%s: Hardware doesn't specify base clock " |
4240ff0a BD |
2883 | "frequency.\n", mmc_hostname(mmc)); |
2884 | return -ENODEV; | |
2885 | } | |
2886 | host->max_clk = host->ops->get_max_clock(host); | |
8ef1a143 | 2887 | } |
d129bceb | 2888 | |
c3ed3877 AN |
2889 | /* |
2890 | * In case of Host Controller v3.00, find out whether clock | |
2891 | * multiplier is supported. | |
2892 | */ | |
2893 | host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >> | |
2894 | SDHCI_CLOCK_MUL_SHIFT; | |
2895 | ||
2896 | /* | |
2897 | * In case the value in Clock Multiplier is 0, then programmable | |
2898 | * clock mode is not supported, otherwise the actual clock | |
2899 | * multiplier is one more than the value of Clock Multiplier | |
2900 | * in the Capabilities Register. | |
2901 | */ | |
2902 | if (host->clk_mul) | |
2903 | host->clk_mul += 1; | |
2904 | ||
d129bceb PO |
2905 | /* |
2906 | * Set host parameters. | |
2907 | */ | |
2908 | mmc->ops = &sdhci_ops; | |
c3ed3877 | 2909 | mmc->f_max = host->max_clk; |
ce5f036b | 2910 | if (host->ops->get_min_clock) |
a9e58f25 | 2911 | mmc->f_min = host->ops->get_min_clock(host); |
c3ed3877 AN |
2912 | else if (host->version >= SDHCI_SPEC_300) { |
2913 | if (host->clk_mul) { | |
2914 | mmc->f_min = (host->max_clk * host->clk_mul) / 1024; | |
2915 | mmc->f_max = host->max_clk * host->clk_mul; | |
2916 | } else | |
2917 | mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300; | |
2918 | } else | |
0397526d | 2919 | mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200; |
15ec4461 | 2920 | |
272308ca AS |
2921 | host->timeout_clk = |
2922 | (caps[0] & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT; | |
2923 | if (host->timeout_clk == 0) { | |
2924 | if (host->ops->get_timeout_clock) { | |
2925 | host->timeout_clk = host->ops->get_timeout_clock(host); | |
2926 | } else if (!(host->quirks & | |
2927 | SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) { | |
a3c76eb9 | 2928 | pr_err("%s: Hardware doesn't specify timeout clock " |
272308ca AS |
2929 | "frequency.\n", mmc_hostname(mmc)); |
2930 | return -ENODEV; | |
2931 | } | |
2932 | } | |
2933 | if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT) | |
2934 | host->timeout_clk *= 1000; | |
2935 | ||
2936 | if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) | |
65be3fef | 2937 | host->timeout_clk = mmc->f_max / 1000; |
272308ca | 2938 | |
65be3fef | 2939 | mmc->max_discard_to = (1 << 27) / host->timeout_clk; |
58d1246d | 2940 | |
e89d456f AW |
2941 | mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; |
2942 | ||
2943 | if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) | |
2944 | host->flags |= SDHCI_AUTO_CMD12; | |
5fe23c7f | 2945 | |
8edf6371 | 2946 | /* Auto-CMD23 stuff only works in ADMA or PIO. */ |
4f3d3e9b | 2947 | if ((host->version >= SDHCI_SPEC_300) && |
8edf6371 | 2948 | ((host->flags & SDHCI_USE_ADMA) || |
4f3d3e9b | 2949 | !(host->flags & SDHCI_USE_SDMA))) { |
8edf6371 AW |
2950 | host->flags |= SDHCI_AUTO_CMD23; |
2951 | DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc)); | |
2952 | } else { | |
2953 | DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc)); | |
2954 | } | |
2955 | ||
15ec4461 PR |
2956 | /* |
2957 | * A controller may support 8-bit width, but the board itself | |
2958 | * might not have the pins brought out. Boards that support | |
2959 | * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in | |
2960 | * their platform code before calling sdhci_add_host(), and we | |
2961 | * won't assume 8-bit width for hosts without that CAP. | |
2962 | */ | |
5fe23c7f | 2963 | if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) |
15ec4461 | 2964 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
d129bceb | 2965 | |
63ef5d8c JH |
2966 | if (host->quirks2 & SDHCI_QUIRK2_HOST_NO_CMD23) |
2967 | mmc->caps &= ~MMC_CAP_CMD23; | |
2968 | ||
f2119df6 | 2969 | if (caps[0] & SDHCI_CAN_DO_HISPD) |
a29e7e18 | 2970 | mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; |
cd9277c0 | 2971 | |
176d1ed4 | 2972 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) && |
eb6d5ae1 | 2973 | !(host->mmc->caps & MMC_CAP_NONREMOVABLE)) |
68d1fb7e AV |
2974 | mmc->caps |= MMC_CAP_NEEDS_POLL; |
2975 | ||
6231f3de | 2976 | /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */ |
462849aa | 2977 | host->vqmmc = regulator_get_optional(mmc_dev(mmc), "vqmmc"); |
657d5982 KL |
2978 | if (IS_ERR_OR_NULL(host->vqmmc)) { |
2979 | if (PTR_ERR(host->vqmmc) < 0) { | |
2980 | pr_info("%s: no vqmmc regulator found\n", | |
2981 | mmc_hostname(mmc)); | |
2982 | host->vqmmc = NULL; | |
2983 | } | |
8363c374 | 2984 | } else { |
a3361aba | 2985 | ret = regulator_enable(host->vqmmc); |
cec2e216 KL |
2986 | if (!regulator_is_supported_voltage(host->vqmmc, 1700000, |
2987 | 1950000)) | |
8363c374 KL |
2988 | caps[1] &= ~(SDHCI_SUPPORT_SDR104 | |
2989 | SDHCI_SUPPORT_SDR50 | | |
2990 | SDHCI_SUPPORT_DDR50); | |
a3361aba CB |
2991 | if (ret) { |
2992 | pr_warn("%s: Failed to enable vqmmc regulator: %d\n", | |
2993 | mmc_hostname(mmc), ret); | |
2994 | host->vqmmc = NULL; | |
2995 | } | |
8363c374 | 2996 | } |
6231f3de | 2997 | |
6a66180a DD |
2998 | if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) |
2999 | caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | | |
3000 | SDHCI_SUPPORT_DDR50); | |
3001 | ||
4188bba0 AC |
3002 | /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */ |
3003 | if (caps[1] & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | | |
3004 | SDHCI_SUPPORT_DDR50)) | |
f2119df6 AN |
3005 | mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25; |
3006 | ||
3007 | /* SDR104 supports also implies SDR50 support */ | |
156e14b1 | 3008 | if (caps[1] & SDHCI_SUPPORT_SDR104) { |
f2119df6 | 3009 | mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50; |
156e14b1 GC |
3010 | /* SD3.0: SDR104 is supported so (for eMMC) the caps2 |
3011 | * field can be promoted to support HS200. | |
3012 | */ | |
3013 | mmc->caps2 |= MMC_CAP2_HS200; | |
3014 | } else if (caps[1] & SDHCI_SUPPORT_SDR50) | |
f2119df6 AN |
3015 | mmc->caps |= MMC_CAP_UHS_SDR50; |
3016 | ||
3017 | if (caps[1] & SDHCI_SUPPORT_DDR50) | |
3018 | mmc->caps |= MMC_CAP_UHS_DDR50; | |
3019 | ||
069c9f14 | 3020 | /* Does the host need tuning for SDR50? */ |
b513ea25 AN |
3021 | if (caps[1] & SDHCI_USE_SDR50_TUNING) |
3022 | host->flags |= SDHCI_SDR50_NEEDS_TUNING; | |
3023 | ||
156e14b1 | 3024 | /* Does the host need tuning for SDR104 / HS200? */ |
069c9f14 | 3025 | if (mmc->caps2 & MMC_CAP2_HS200) |
156e14b1 | 3026 | host->flags |= SDHCI_SDR104_NEEDS_TUNING; |
069c9f14 | 3027 | |
d6d50a15 AN |
3028 | /* Driver Type(s) (A, C, D) supported by the host */ |
3029 | if (caps[1] & SDHCI_DRIVER_TYPE_A) | |
3030 | mmc->caps |= MMC_CAP_DRIVER_TYPE_A; | |
3031 | if (caps[1] & SDHCI_DRIVER_TYPE_C) | |
3032 | mmc->caps |= MMC_CAP_DRIVER_TYPE_C; | |
3033 | if (caps[1] & SDHCI_DRIVER_TYPE_D) | |
3034 | mmc->caps |= MMC_CAP_DRIVER_TYPE_D; | |
3035 | ||
cf2b5eea AN |
3036 | /* Initial value for re-tuning timer count */ |
3037 | host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> | |
3038 | SDHCI_RETUNING_TIMER_COUNT_SHIFT; | |
3039 | ||
3040 | /* | |
3041 | * In case Re-tuning Timer is not disabled, the actual value of | |
3042 | * re-tuning timer will be 2 ^ (n - 1). | |
3043 | */ | |
3044 | if (host->tuning_count) | |
3045 | host->tuning_count = 1 << (host->tuning_count - 1); | |
3046 | ||
3047 | /* Re-tuning mode supported by the Host Controller */ | |
3048 | host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >> | |
3049 | SDHCI_RETUNING_MODE_SHIFT; | |
3050 | ||
8f230f45 | 3051 | ocr_avail = 0; |
bad37e1a | 3052 | |
462849aa | 3053 | host->vmmc = regulator_get_optional(mmc_dev(mmc), "vmmc"); |
657d5982 KL |
3054 | if (IS_ERR_OR_NULL(host->vmmc)) { |
3055 | if (PTR_ERR(host->vmmc) < 0) { | |
3056 | pr_info("%s: no vmmc regulator found\n", | |
3057 | mmc_hostname(mmc)); | |
3058 | host->vmmc = NULL; | |
3059 | } | |
8363c374 | 3060 | } |
bad37e1a | 3061 | |
68737043 | 3062 | #ifdef CONFIG_REGULATOR |
a4f8f257 MS |
3063 | /* |
3064 | * Voltage range check makes sense only if regulator reports | |
3065 | * any voltage value. | |
3066 | */ | |
3067 | if (host->vmmc && regulator_get_voltage(host->vmmc) > 0) { | |
cec2e216 KL |
3068 | ret = regulator_is_supported_voltage(host->vmmc, 2700000, |
3069 | 3600000); | |
68737043 PR |
3070 | if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330))) |
3071 | caps[0] &= ~SDHCI_CAN_VDD_330; | |
68737043 PR |
3072 | if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300))) |
3073 | caps[0] &= ~SDHCI_CAN_VDD_300; | |
cec2e216 KL |
3074 | ret = regulator_is_supported_voltage(host->vmmc, 1700000, |
3075 | 1950000); | |
68737043 PR |
3076 | if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180))) |
3077 | caps[0] &= ~SDHCI_CAN_VDD_180; | |
3078 | } | |
3079 | #endif /* CONFIG_REGULATOR */ | |
3080 | ||
f2119df6 AN |
3081 | /* |
3082 | * According to SD Host Controller spec v3.00, if the Host System | |
3083 | * can afford more than 150mA, Host Driver should set XPC to 1. Also | |
3084 | * the value is meaningful only if Voltage Support in the Capabilities | |
3085 | * register is set. The actual current value is 4 times the register | |
3086 | * value. | |
3087 | */ | |
3088 | max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT); | |
bad37e1a PR |
3089 | if (!max_current_caps && host->vmmc) { |
3090 | u32 curr = regulator_get_current_limit(host->vmmc); | |
3091 | if (curr > 0) { | |
3092 | ||
3093 | /* convert to SDHCI_MAX_CURRENT format */ | |
3094 | curr = curr/1000; /* convert to mA */ | |
3095 | curr = curr/SDHCI_MAX_CURRENT_MULTIPLIER; | |
3096 | ||
3097 | curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT); | |
3098 | max_current_caps = | |
3099 | (curr << SDHCI_MAX_CURRENT_330_SHIFT) | | |
3100 | (curr << SDHCI_MAX_CURRENT_300_SHIFT) | | |
3101 | (curr << SDHCI_MAX_CURRENT_180_SHIFT); | |
3102 | } | |
3103 | } | |
f2119df6 AN |
3104 | |
3105 | if (caps[0] & SDHCI_CAN_VDD_330) { | |
8f230f45 | 3106 | ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34; |
f2119df6 | 3107 | |
55c4665e | 3108 | mmc->max_current_330 = ((max_current_caps & |
f2119df6 AN |
3109 | SDHCI_MAX_CURRENT_330_MASK) >> |
3110 | SDHCI_MAX_CURRENT_330_SHIFT) * | |
3111 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
f2119df6 AN |
3112 | } |
3113 | if (caps[0] & SDHCI_CAN_VDD_300) { | |
8f230f45 | 3114 | ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31; |
f2119df6 | 3115 | |
55c4665e | 3116 | mmc->max_current_300 = ((max_current_caps & |
f2119df6 AN |
3117 | SDHCI_MAX_CURRENT_300_MASK) >> |
3118 | SDHCI_MAX_CURRENT_300_SHIFT) * | |
3119 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
f2119df6 AN |
3120 | } |
3121 | if (caps[0] & SDHCI_CAN_VDD_180) { | |
8f230f45 TI |
3122 | ocr_avail |= MMC_VDD_165_195; |
3123 | ||
55c4665e | 3124 | mmc->max_current_180 = ((max_current_caps & |
f2119df6 AN |
3125 | SDHCI_MAX_CURRENT_180_MASK) >> |
3126 | SDHCI_MAX_CURRENT_180_SHIFT) * | |
3127 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
f2119df6 AN |
3128 | } |
3129 | ||
c0b887b6 HZ |
3130 | if (host->ocr_mask) |
3131 | ocr_avail = host->ocr_mask; | |
3132 | ||
8f230f45 TI |
3133 | mmc->ocr_avail = ocr_avail; |
3134 | mmc->ocr_avail_sdio = ocr_avail; | |
3135 | if (host->ocr_avail_sdio) | |
3136 | mmc->ocr_avail_sdio &= host->ocr_avail_sdio; | |
3137 | mmc->ocr_avail_sd = ocr_avail; | |
3138 | if (host->ocr_avail_sd) | |
3139 | mmc->ocr_avail_sd &= host->ocr_avail_sd; | |
3140 | else /* normal SD controllers don't support 1.8V */ | |
3141 | mmc->ocr_avail_sd &= ~MMC_VDD_165_195; | |
3142 | mmc->ocr_avail_mmc = ocr_avail; | |
3143 | if (host->ocr_avail_mmc) | |
3144 | mmc->ocr_avail_mmc &= host->ocr_avail_mmc; | |
146ad66e PO |
3145 | |
3146 | if (mmc->ocr_avail == 0) { | |
a3c76eb9 | 3147 | pr_err("%s: Hardware doesn't report any " |
b69c9058 | 3148 | "support voltages.\n", mmc_hostname(mmc)); |
b8c86fc5 | 3149 | return -ENODEV; |
146ad66e PO |
3150 | } |
3151 | ||
d129bceb PO |
3152 | spin_lock_init(&host->lock); |
3153 | ||
3154 | /* | |
2134a922 PO |
3155 | * Maximum number of segments. Depends on if the hardware |
3156 | * can do scatter/gather or not. | |
d129bceb | 3157 | */ |
2134a922 | 3158 | if (host->flags & SDHCI_USE_ADMA) |
a36274e0 | 3159 | mmc->max_segs = 128; |
a13abc7b | 3160 | else if (host->flags & SDHCI_USE_SDMA) |
a36274e0 | 3161 | mmc->max_segs = 1; |
2134a922 | 3162 | else /* PIO */ |
a36274e0 | 3163 | mmc->max_segs = 128; |
d129bceb PO |
3164 | |
3165 | /* | |
bab76961 | 3166 | * Maximum number of sectors in one transfer. Limited by DMA boundary |
55db890a | 3167 | * size (512KiB). |
d129bceb | 3168 | */ |
55db890a | 3169 | mmc->max_req_size = 524288; |
d129bceb PO |
3170 | |
3171 | /* | |
3172 | * Maximum segment size. Could be one segment with the maximum number | |
2134a922 PO |
3173 | * of bytes. When doing hardware scatter/gather, each entry cannot |
3174 | * be larger than 64 KiB though. | |
d129bceb | 3175 | */ |
30652aa3 OJ |
3176 | if (host->flags & SDHCI_USE_ADMA) { |
3177 | if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC) | |
3178 | mmc->max_seg_size = 65535; | |
3179 | else | |
3180 | mmc->max_seg_size = 65536; | |
3181 | } else { | |
2134a922 | 3182 | mmc->max_seg_size = mmc->max_req_size; |
30652aa3 | 3183 | } |
d129bceb | 3184 | |
fe4a3c7a PO |
3185 | /* |
3186 | * Maximum block size. This varies from controller to controller and | |
3187 | * is specified in the capabilities register. | |
3188 | */ | |
0633f654 AV |
3189 | if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) { |
3190 | mmc->max_blk_size = 2; | |
3191 | } else { | |
f2119df6 | 3192 | mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >> |
0633f654 AV |
3193 | SDHCI_MAX_BLOCK_SHIFT; |
3194 | if (mmc->max_blk_size >= 3) { | |
a3c76eb9 | 3195 | pr_warning("%s: Invalid maximum block size, " |
0633f654 AV |
3196 | "assuming 512 bytes\n", mmc_hostname(mmc)); |
3197 | mmc->max_blk_size = 0; | |
3198 | } | |
3199 | } | |
3200 | ||
3201 | mmc->max_blk_size = 512 << mmc->max_blk_size; | |
fe4a3c7a | 3202 | |
55db890a PO |
3203 | /* |
3204 | * Maximum block count. | |
3205 | */ | |
1388eefd | 3206 | mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; |
55db890a | 3207 | |
d129bceb PO |
3208 | /* |
3209 | * Init tasklets. | |
3210 | */ | |
3211 | tasklet_init(&host->card_tasklet, | |
3212 | sdhci_tasklet_card, (unsigned long)host); | |
3213 | tasklet_init(&host->finish_tasklet, | |
3214 | sdhci_tasklet_finish, (unsigned long)host); | |
3215 | ||
e4cad1b5 | 3216 | setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host); |
d129bceb | 3217 | |
cf2b5eea | 3218 | if (host->version >= SDHCI_SPEC_300) { |
b513ea25 AN |
3219 | init_waitqueue_head(&host->buf_ready_int); |
3220 | ||
cf2b5eea AN |
3221 | /* Initialize re-tuning timer */ |
3222 | init_timer(&host->tuning_timer); | |
3223 | host->tuning_timer.data = (unsigned long)host; | |
3224 | host->tuning_timer.function = sdhci_tuning_timer; | |
3225 | } | |
3226 | ||
2af502ca SG |
3227 | sdhci_init(host, 0); |
3228 | ||
dace1453 | 3229 | ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, |
b69c9058 | 3230 | mmc_hostname(mmc), host); |
0fc81ee3 MB |
3231 | if (ret) { |
3232 | pr_err("%s: Failed to request IRQ %d: %d\n", | |
3233 | mmc_hostname(mmc), host->irq, ret); | |
8ef1a143 | 3234 | goto untasklet; |
0fc81ee3 | 3235 | } |
d129bceb | 3236 | |
d129bceb PO |
3237 | #ifdef CONFIG_MMC_DEBUG |
3238 | sdhci_dumpregs(host); | |
3239 | #endif | |
3240 | ||
f9134319 | 3241 | #ifdef SDHCI_USE_LEDS_CLASS |
5dbace0c HS |
3242 | snprintf(host->led_name, sizeof(host->led_name), |
3243 | "%s::", mmc_hostname(mmc)); | |
3244 | host->led.name = host->led_name; | |
2f730fec PO |
3245 | host->led.brightness = LED_OFF; |
3246 | host->led.default_trigger = mmc_hostname(mmc); | |
3247 | host->led.brightness_set = sdhci_led_control; | |
3248 | ||
b8c86fc5 | 3249 | ret = led_classdev_register(mmc_dev(mmc), &host->led); |
0fc81ee3 MB |
3250 | if (ret) { |
3251 | pr_err("%s: Failed to register LED device: %d\n", | |
3252 | mmc_hostname(mmc), ret); | |
2f730fec | 3253 | goto reset; |
0fc81ee3 | 3254 | } |
2f730fec PO |
3255 | #endif |
3256 | ||
5f25a66f PO |
3257 | mmiowb(); |
3258 | ||
d129bceb PO |
3259 | mmc_add_host(mmc); |
3260 | ||
a3c76eb9 | 3261 | pr_info("%s: SDHCI controller on %s [%s] using %s\n", |
d1b26863 | 3262 | mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)), |
a13abc7b RR |
3263 | (host->flags & SDHCI_USE_ADMA) ? "ADMA" : |
3264 | (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO"); | |
d129bceb | 3265 | |
7260cf5e AV |
3266 | sdhci_enable_card_detection(host); |
3267 | ||
d129bceb PO |
3268 | return 0; |
3269 | ||
f9134319 | 3270 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
3271 | reset: |
3272 | sdhci_reset(host, SDHCI_RESET_ALL); | |
b0a8dece | 3273 | sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); |
2f730fec PO |
3274 | free_irq(host->irq, host); |
3275 | #endif | |
8ef1a143 | 3276 | untasklet: |
d129bceb PO |
3277 | tasklet_kill(&host->card_tasklet); |
3278 | tasklet_kill(&host->finish_tasklet); | |
d129bceb PO |
3279 | |
3280 | return ret; | |
3281 | } | |
3282 | ||
b8c86fc5 | 3283 | EXPORT_SYMBOL_GPL(sdhci_add_host); |
d129bceb | 3284 | |
1e72859e | 3285 | void sdhci_remove_host(struct sdhci_host *host, int dead) |
b8c86fc5 | 3286 | { |
1e72859e PO |
3287 | unsigned long flags; |
3288 | ||
3289 | if (dead) { | |
3290 | spin_lock_irqsave(&host->lock, flags); | |
3291 | ||
3292 | host->flags |= SDHCI_DEVICE_DEAD; | |
3293 | ||
3294 | if (host->mrq) { | |
a3c76eb9 | 3295 | pr_err("%s: Controller removed during " |
1e72859e PO |
3296 | " transfer!\n", mmc_hostname(host->mmc)); |
3297 | ||
3298 | host->mrq->cmd->error = -ENOMEDIUM; | |
3299 | tasklet_schedule(&host->finish_tasklet); | |
3300 | } | |
3301 | ||
3302 | spin_unlock_irqrestore(&host->lock, flags); | |
3303 | } | |
3304 | ||
7260cf5e AV |
3305 | sdhci_disable_card_detection(host); |
3306 | ||
b8c86fc5 | 3307 | mmc_remove_host(host->mmc); |
d129bceb | 3308 | |
f9134319 | 3309 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
3310 | led_classdev_unregister(&host->led); |
3311 | #endif | |
3312 | ||
1e72859e PO |
3313 | if (!dead) |
3314 | sdhci_reset(host, SDHCI_RESET_ALL); | |
d129bceb | 3315 | |
b0a8dece | 3316 | sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); |
d129bceb PO |
3317 | free_irq(host->irq, host); |
3318 | ||
3319 | del_timer_sync(&host->timer); | |
3320 | ||
3321 | tasklet_kill(&host->card_tasklet); | |
3322 | tasklet_kill(&host->finish_tasklet); | |
2134a922 | 3323 | |
77dcb3f4 PR |
3324 | if (host->vmmc) { |
3325 | regulator_disable(host->vmmc); | |
9bea3c85 | 3326 | regulator_put(host->vmmc); |
77dcb3f4 | 3327 | } |
9bea3c85 | 3328 | |
6231f3de PR |
3329 | if (host->vqmmc) { |
3330 | regulator_disable(host->vqmmc); | |
3331 | regulator_put(host->vqmmc); | |
3332 | } | |
3333 | ||
2134a922 PO |
3334 | kfree(host->adma_desc); |
3335 | kfree(host->align_buffer); | |
3336 | ||
3337 | host->adma_desc = NULL; | |
3338 | host->align_buffer = NULL; | |
d129bceb PO |
3339 | } |
3340 | ||
b8c86fc5 | 3341 | EXPORT_SYMBOL_GPL(sdhci_remove_host); |
d129bceb | 3342 | |
b8c86fc5 | 3343 | void sdhci_free_host(struct sdhci_host *host) |
d129bceb | 3344 | { |
b8c86fc5 | 3345 | mmc_free_host(host->mmc); |
d129bceb PO |
3346 | } |
3347 | ||
b8c86fc5 | 3348 | EXPORT_SYMBOL_GPL(sdhci_free_host); |
d129bceb PO |
3349 | |
3350 | /*****************************************************************************\ | |
3351 | * * | |
3352 | * Driver init/exit * | |
3353 | * * | |
3354 | \*****************************************************************************/ | |
3355 | ||
3356 | static int __init sdhci_drv_init(void) | |
3357 | { | |
a3c76eb9 | 3358 | pr_info(DRIVER_NAME |
52fbf9c9 | 3359 | ": Secure Digital Host Controller Interface driver\n"); |
a3c76eb9 | 3360 | pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); |
d129bceb | 3361 | |
b8c86fc5 | 3362 | return 0; |
d129bceb PO |
3363 | } |
3364 | ||
3365 | static void __exit sdhci_drv_exit(void) | |
3366 | { | |
d129bceb PO |
3367 | } |
3368 | ||
3369 | module_init(sdhci_drv_init); | |
3370 | module_exit(sdhci_drv_exit); | |
3371 | ||
df673b22 | 3372 | module_param(debug_quirks, uint, 0444); |
66fd8ad5 | 3373 | module_param(debug_quirks2, uint, 0444); |
67435274 | 3374 | |
32710e8f | 3375 | MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>"); |
b8c86fc5 | 3376 | MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver"); |
d129bceb | 3377 | MODULE_LICENSE("GPL"); |
67435274 | 3378 | |
df673b22 | 3379 | MODULE_PARM_DESC(debug_quirks, "Force certain quirks."); |
66fd8ad5 | 3380 | MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks."); |