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> |
d129bceb | 19 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
11763609 | 21 | #include <linux/scatterlist.h> |
9bea3c85 | 22 | #include <linux/regulator/consumer.h> |
d129bceb | 23 | |
2f730fec PO |
24 | #include <linux/leds.h> |
25 | ||
22113efd | 26 | #include <linux/mmc/mmc.h> |
d129bceb | 27 | #include <linux/mmc/host.h> |
d129bceb | 28 | |
d129bceb PO |
29 | #include "sdhci.h" |
30 | ||
31 | #define DRIVER_NAME "sdhci" | |
d129bceb | 32 | |
d129bceb | 33 | #define DBG(f, x...) \ |
c6563178 | 34 | pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x) |
d129bceb | 35 | |
f9134319 PO |
36 | #if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ |
37 | defined(CONFIG_MMC_SDHCI_MODULE)) | |
38 | #define SDHCI_USE_LEDS_CLASS | |
39 | #endif | |
40 | ||
b513ea25 AN |
41 | #define MAX_TUNING_LOOP 40 |
42 | ||
df673b22 | 43 | static unsigned int debug_quirks = 0; |
67435274 | 44 | |
d129bceb PO |
45 | static void sdhci_finish_data(struct sdhci_host *); |
46 | ||
47 | static void sdhci_send_command(struct sdhci_host *, struct mmc_command *); | |
48 | static void sdhci_finish_command(struct sdhci_host *); | |
cf2b5eea AN |
49 | static int sdhci_execute_tuning(struct mmc_host *mmc); |
50 | static void sdhci_tuning_timer(unsigned long data); | |
d129bceb PO |
51 | |
52 | static void sdhci_dumpregs(struct sdhci_host *host) | |
53 | { | |
412ab659 PR |
54 | printk(KERN_DEBUG DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n", |
55 | mmc_hostname(host->mmc)); | |
d129bceb PO |
56 | |
57 | printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n", | |
4e4141a5 AV |
58 | sdhci_readl(host, SDHCI_DMA_ADDRESS), |
59 | sdhci_readw(host, SDHCI_HOST_VERSION)); | |
d129bceb | 60 | printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n", |
4e4141a5 AV |
61 | sdhci_readw(host, SDHCI_BLOCK_SIZE), |
62 | sdhci_readw(host, SDHCI_BLOCK_COUNT)); | |
d129bceb | 63 | printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n", |
4e4141a5 AV |
64 | sdhci_readl(host, SDHCI_ARGUMENT), |
65 | sdhci_readw(host, SDHCI_TRANSFER_MODE)); | |
d129bceb | 66 | printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n", |
4e4141a5 AV |
67 | sdhci_readl(host, SDHCI_PRESENT_STATE), |
68 | sdhci_readb(host, SDHCI_HOST_CONTROL)); | |
d129bceb | 69 | printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n", |
4e4141a5 AV |
70 | sdhci_readb(host, SDHCI_POWER_CONTROL), |
71 | sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL)); | |
d129bceb | 72 | printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", |
4e4141a5 AV |
73 | sdhci_readb(host, SDHCI_WAKE_UP_CONTROL), |
74 | sdhci_readw(host, SDHCI_CLOCK_CONTROL)); | |
d129bceb | 75 | printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", |
4e4141a5 AV |
76 | sdhci_readb(host, SDHCI_TIMEOUT_CONTROL), |
77 | sdhci_readl(host, SDHCI_INT_STATUS)); | |
d129bceb | 78 | printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n", |
4e4141a5 AV |
79 | sdhci_readl(host, SDHCI_INT_ENABLE), |
80 | sdhci_readl(host, SDHCI_SIGNAL_ENABLE)); | |
d129bceb | 81 | printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n", |
4e4141a5 AV |
82 | sdhci_readw(host, SDHCI_ACMD12_ERR), |
83 | sdhci_readw(host, SDHCI_SLOT_INT_STATUS)); | |
e8120ad1 | 84 | printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n", |
4e4141a5 | 85 | sdhci_readl(host, SDHCI_CAPABILITIES), |
e8120ad1 PR |
86 | sdhci_readl(host, SDHCI_CAPABILITIES_1)); |
87 | printk(KERN_DEBUG DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n", | |
88 | sdhci_readw(host, SDHCI_COMMAND), | |
4e4141a5 | 89 | sdhci_readl(host, SDHCI_MAX_CURRENT)); |
f2119df6 AN |
90 | printk(KERN_DEBUG DRIVER_NAME ": Host ctl2: 0x%08x\n", |
91 | sdhci_readw(host, SDHCI_HOST_CONTROL2)); | |
d129bceb | 92 | |
be3f4ae0 BD |
93 | if (host->flags & SDHCI_USE_ADMA) |
94 | printk(KERN_DEBUG DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n", | |
95 | readl(host->ioaddr + SDHCI_ADMA_ERROR), | |
96 | readl(host->ioaddr + SDHCI_ADMA_ADDRESS)); | |
97 | ||
d129bceb PO |
98 | printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n"); |
99 | } | |
100 | ||
101 | /*****************************************************************************\ | |
102 | * * | |
103 | * Low level functions * | |
104 | * * | |
105 | \*****************************************************************************/ | |
106 | ||
7260cf5e AV |
107 | static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) |
108 | { | |
109 | u32 ier; | |
110 | ||
111 | ier = sdhci_readl(host, SDHCI_INT_ENABLE); | |
112 | ier &= ~clear; | |
113 | ier |= set; | |
114 | sdhci_writel(host, ier, SDHCI_INT_ENABLE); | |
115 | sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); | |
116 | } | |
117 | ||
118 | static void sdhci_unmask_irqs(struct sdhci_host *host, u32 irqs) | |
119 | { | |
120 | sdhci_clear_set_irqs(host, 0, irqs); | |
121 | } | |
122 | ||
123 | static void sdhci_mask_irqs(struct sdhci_host *host, u32 irqs) | |
124 | { | |
125 | sdhci_clear_set_irqs(host, irqs, 0); | |
126 | } | |
127 | ||
128 | static void sdhci_set_card_detection(struct sdhci_host *host, bool enable) | |
129 | { | |
d25928d1 | 130 | u32 present, irqs; |
7260cf5e | 131 | |
68d1fb7e AV |
132 | if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) |
133 | return; | |
134 | ||
d25928d1 SG |
135 | present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
136 | SDHCI_CARD_PRESENT; | |
137 | irqs = present ? SDHCI_INT_CARD_REMOVE : SDHCI_INT_CARD_INSERT; | |
138 | ||
7260cf5e AV |
139 | if (enable) |
140 | sdhci_unmask_irqs(host, irqs); | |
141 | else | |
142 | sdhci_mask_irqs(host, irqs); | |
143 | } | |
144 | ||
145 | static void sdhci_enable_card_detection(struct sdhci_host *host) | |
146 | { | |
147 | sdhci_set_card_detection(host, true); | |
148 | } | |
149 | ||
150 | static void sdhci_disable_card_detection(struct sdhci_host *host) | |
151 | { | |
152 | sdhci_set_card_detection(host, false); | |
153 | } | |
154 | ||
d129bceb PO |
155 | static void sdhci_reset(struct sdhci_host *host, u8 mask) |
156 | { | |
e16514d8 | 157 | unsigned long timeout; |
063a9dbb | 158 | u32 uninitialized_var(ier); |
e16514d8 | 159 | |
b8c86fc5 | 160 | if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { |
4e4141a5 | 161 | if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & |
8a4da143 PO |
162 | SDHCI_CARD_PRESENT)) |
163 | return; | |
164 | } | |
165 | ||
063a9dbb AV |
166 | if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) |
167 | ier = sdhci_readl(host, SDHCI_INT_ENABLE); | |
168 | ||
393c1a34 PR |
169 | if (host->ops->platform_reset_enter) |
170 | host->ops->platform_reset_enter(host, mask); | |
171 | ||
4e4141a5 | 172 | sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); |
d129bceb | 173 | |
e16514d8 | 174 | if (mask & SDHCI_RESET_ALL) |
d129bceb PO |
175 | host->clock = 0; |
176 | ||
e16514d8 PO |
177 | /* Wait max 100 ms */ |
178 | timeout = 100; | |
179 | ||
180 | /* hw clears the bit when it's done */ | |
4e4141a5 | 181 | while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) { |
e16514d8 | 182 | if (timeout == 0) { |
acf1da45 | 183 | printk(KERN_ERR "%s: Reset 0x%x never completed.\n", |
e16514d8 PO |
184 | mmc_hostname(host->mmc), (int)mask); |
185 | sdhci_dumpregs(host); | |
186 | return; | |
187 | } | |
188 | timeout--; | |
189 | mdelay(1); | |
d129bceb | 190 | } |
063a9dbb | 191 | |
393c1a34 PR |
192 | if (host->ops->platform_reset_exit) |
193 | host->ops->platform_reset_exit(host, mask); | |
194 | ||
063a9dbb AV |
195 | if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) |
196 | sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier); | |
d129bceb PO |
197 | } |
198 | ||
2f4cbb3d NP |
199 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); |
200 | ||
201 | static void sdhci_init(struct sdhci_host *host, int soft) | |
d129bceb | 202 | { |
2f4cbb3d NP |
203 | if (soft) |
204 | sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA); | |
205 | else | |
206 | sdhci_reset(host, SDHCI_RESET_ALL); | |
d129bceb | 207 | |
7260cf5e AV |
208 | sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, |
209 | SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | | |
3192a28f PO |
210 | SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | |
211 | SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | | |
6aa943ab | 212 | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE); |
2f4cbb3d NP |
213 | |
214 | if (soft) { | |
215 | /* force clock reconfiguration */ | |
216 | host->clock = 0; | |
217 | sdhci_set_ios(host->mmc, &host->mmc->ios); | |
218 | } | |
7260cf5e | 219 | } |
d129bceb | 220 | |
7260cf5e AV |
221 | static void sdhci_reinit(struct sdhci_host *host) |
222 | { | |
2f4cbb3d | 223 | sdhci_init(host, 0); |
7260cf5e | 224 | sdhci_enable_card_detection(host); |
d129bceb PO |
225 | } |
226 | ||
227 | static void sdhci_activate_led(struct sdhci_host *host) | |
228 | { | |
229 | u8 ctrl; | |
230 | ||
4e4141a5 | 231 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
d129bceb | 232 | ctrl |= SDHCI_CTRL_LED; |
4e4141a5 | 233 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d129bceb PO |
234 | } |
235 | ||
236 | static void sdhci_deactivate_led(struct sdhci_host *host) | |
237 | { | |
238 | u8 ctrl; | |
239 | ||
4e4141a5 | 240 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
d129bceb | 241 | ctrl &= ~SDHCI_CTRL_LED; |
4e4141a5 | 242 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d129bceb PO |
243 | } |
244 | ||
f9134319 | 245 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
246 | static void sdhci_led_control(struct led_classdev *led, |
247 | enum led_brightness brightness) | |
248 | { | |
249 | struct sdhci_host *host = container_of(led, struct sdhci_host, led); | |
250 | unsigned long flags; | |
251 | ||
252 | spin_lock_irqsave(&host->lock, flags); | |
253 | ||
254 | if (brightness == LED_OFF) | |
255 | sdhci_deactivate_led(host); | |
256 | else | |
257 | sdhci_activate_led(host); | |
258 | ||
259 | spin_unlock_irqrestore(&host->lock, flags); | |
260 | } | |
261 | #endif | |
262 | ||
d129bceb PO |
263 | /*****************************************************************************\ |
264 | * * | |
265 | * Core functions * | |
266 | * * | |
267 | \*****************************************************************************/ | |
268 | ||
a406f5a3 | 269 | static void sdhci_read_block_pio(struct sdhci_host *host) |
d129bceb | 270 | { |
7659150c PO |
271 | unsigned long flags; |
272 | size_t blksize, len, chunk; | |
7244b85b | 273 | u32 uninitialized_var(scratch); |
7659150c | 274 | u8 *buf; |
d129bceb | 275 | |
a406f5a3 | 276 | DBG("PIO reading\n"); |
d129bceb | 277 | |
a406f5a3 | 278 | blksize = host->data->blksz; |
7659150c | 279 | chunk = 0; |
d129bceb | 280 | |
7659150c | 281 | local_irq_save(flags); |
d129bceb | 282 | |
a406f5a3 | 283 | while (blksize) { |
7659150c PO |
284 | if (!sg_miter_next(&host->sg_miter)) |
285 | BUG(); | |
d129bceb | 286 | |
7659150c | 287 | len = min(host->sg_miter.length, blksize); |
d129bceb | 288 | |
7659150c PO |
289 | blksize -= len; |
290 | host->sg_miter.consumed = len; | |
14d836e7 | 291 | |
7659150c | 292 | buf = host->sg_miter.addr; |
d129bceb | 293 | |
7659150c PO |
294 | while (len) { |
295 | if (chunk == 0) { | |
4e4141a5 | 296 | scratch = sdhci_readl(host, SDHCI_BUFFER); |
7659150c | 297 | chunk = 4; |
a406f5a3 | 298 | } |
7659150c PO |
299 | |
300 | *buf = scratch & 0xFF; | |
301 | ||
302 | buf++; | |
303 | scratch >>= 8; | |
304 | chunk--; | |
305 | len--; | |
d129bceb | 306 | } |
a406f5a3 | 307 | } |
7659150c PO |
308 | |
309 | sg_miter_stop(&host->sg_miter); | |
310 | ||
311 | local_irq_restore(flags); | |
a406f5a3 | 312 | } |
d129bceb | 313 | |
a406f5a3 PO |
314 | static void sdhci_write_block_pio(struct sdhci_host *host) |
315 | { | |
7659150c PO |
316 | unsigned long flags; |
317 | size_t blksize, len, chunk; | |
318 | u32 scratch; | |
319 | u8 *buf; | |
d129bceb | 320 | |
a406f5a3 PO |
321 | DBG("PIO writing\n"); |
322 | ||
323 | blksize = host->data->blksz; | |
7659150c PO |
324 | chunk = 0; |
325 | scratch = 0; | |
d129bceb | 326 | |
7659150c | 327 | local_irq_save(flags); |
d129bceb | 328 | |
a406f5a3 | 329 | while (blksize) { |
7659150c PO |
330 | if (!sg_miter_next(&host->sg_miter)) |
331 | BUG(); | |
a406f5a3 | 332 | |
7659150c PO |
333 | len = min(host->sg_miter.length, blksize); |
334 | ||
335 | blksize -= len; | |
336 | host->sg_miter.consumed = len; | |
337 | ||
338 | buf = host->sg_miter.addr; | |
d129bceb | 339 | |
7659150c PO |
340 | while (len) { |
341 | scratch |= (u32)*buf << (chunk * 8); | |
342 | ||
343 | buf++; | |
344 | chunk++; | |
345 | len--; | |
346 | ||
347 | if ((chunk == 4) || ((len == 0) && (blksize == 0))) { | |
4e4141a5 | 348 | sdhci_writel(host, scratch, SDHCI_BUFFER); |
7659150c PO |
349 | chunk = 0; |
350 | scratch = 0; | |
d129bceb | 351 | } |
d129bceb PO |
352 | } |
353 | } | |
7659150c PO |
354 | |
355 | sg_miter_stop(&host->sg_miter); | |
356 | ||
357 | local_irq_restore(flags); | |
a406f5a3 PO |
358 | } |
359 | ||
360 | static void sdhci_transfer_pio(struct sdhci_host *host) | |
361 | { | |
362 | u32 mask; | |
363 | ||
364 | BUG_ON(!host->data); | |
365 | ||
7659150c | 366 | if (host->blocks == 0) |
a406f5a3 PO |
367 | return; |
368 | ||
369 | if (host->data->flags & MMC_DATA_READ) | |
370 | mask = SDHCI_DATA_AVAILABLE; | |
371 | else | |
372 | mask = SDHCI_SPACE_AVAILABLE; | |
373 | ||
4a3cba32 PO |
374 | /* |
375 | * Some controllers (JMicron JMB38x) mess up the buffer bits | |
376 | * for transfers < 4 bytes. As long as it is just one block, | |
377 | * we can ignore the bits. | |
378 | */ | |
379 | if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) && | |
380 | (host->data->blocks == 1)) | |
381 | mask = ~0; | |
382 | ||
4e4141a5 | 383 | while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
3e3bf207 AV |
384 | if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY) |
385 | udelay(100); | |
386 | ||
a406f5a3 PO |
387 | if (host->data->flags & MMC_DATA_READ) |
388 | sdhci_read_block_pio(host); | |
389 | else | |
390 | sdhci_write_block_pio(host); | |
d129bceb | 391 | |
7659150c PO |
392 | host->blocks--; |
393 | if (host->blocks == 0) | |
a406f5a3 | 394 | break; |
a406f5a3 | 395 | } |
d129bceb | 396 | |
a406f5a3 | 397 | DBG("PIO transfer complete.\n"); |
d129bceb PO |
398 | } |
399 | ||
2134a922 PO |
400 | static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags) |
401 | { | |
402 | local_irq_save(*flags); | |
403 | return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; | |
404 | } | |
405 | ||
406 | static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) | |
407 | { | |
408 | kunmap_atomic(buffer, KM_BIO_SRC_IRQ); | |
409 | local_irq_restore(*flags); | |
410 | } | |
411 | ||
118cd17d BD |
412 | static void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd) |
413 | { | |
9e506f35 BD |
414 | __le32 *dataddr = (__le32 __force *)(desc + 4); |
415 | __le16 *cmdlen = (__le16 __force *)desc; | |
118cd17d | 416 | |
9e506f35 BD |
417 | /* SDHCI specification says ADMA descriptors should be 4 byte |
418 | * aligned, so using 16 or 32bit operations should be safe. */ | |
118cd17d | 419 | |
9e506f35 BD |
420 | cmdlen[0] = cpu_to_le16(cmd); |
421 | cmdlen[1] = cpu_to_le16(len); | |
422 | ||
423 | dataddr[0] = cpu_to_le32(addr); | |
118cd17d BD |
424 | } |
425 | ||
8f1934ce | 426 | static int sdhci_adma_table_pre(struct sdhci_host *host, |
2134a922 PO |
427 | struct mmc_data *data) |
428 | { | |
429 | int direction; | |
430 | ||
431 | u8 *desc; | |
432 | u8 *align; | |
433 | dma_addr_t addr; | |
434 | dma_addr_t align_addr; | |
435 | int len, offset; | |
436 | ||
437 | struct scatterlist *sg; | |
438 | int i; | |
439 | char *buffer; | |
440 | unsigned long flags; | |
441 | ||
442 | /* | |
443 | * The spec does not specify endianness of descriptor table. | |
444 | * We currently guess that it is LE. | |
445 | */ | |
446 | ||
447 | if (data->flags & MMC_DATA_READ) | |
448 | direction = DMA_FROM_DEVICE; | |
449 | else | |
450 | direction = DMA_TO_DEVICE; | |
451 | ||
452 | /* | |
453 | * The ADMA descriptor table is mapped further down as we | |
454 | * need to fill it with data first. | |
455 | */ | |
456 | ||
457 | host->align_addr = dma_map_single(mmc_dev(host->mmc), | |
458 | host->align_buffer, 128 * 4, direction); | |
8d8bb39b | 459 | if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr)) |
8f1934ce | 460 | goto fail; |
2134a922 PO |
461 | BUG_ON(host->align_addr & 0x3); |
462 | ||
463 | host->sg_count = dma_map_sg(mmc_dev(host->mmc), | |
464 | data->sg, data->sg_len, direction); | |
8f1934ce PO |
465 | if (host->sg_count == 0) |
466 | goto unmap_align; | |
2134a922 PO |
467 | |
468 | desc = host->adma_desc; | |
469 | align = host->align_buffer; | |
470 | ||
471 | align_addr = host->align_addr; | |
472 | ||
473 | for_each_sg(data->sg, sg, host->sg_count, i) { | |
474 | addr = sg_dma_address(sg); | |
475 | len = sg_dma_len(sg); | |
476 | ||
477 | /* | |
478 | * The SDHCI specification states that ADMA | |
479 | * addresses must be 32-bit aligned. If they | |
480 | * aren't, then we use a bounce buffer for | |
481 | * the (up to three) bytes that screw up the | |
482 | * alignment. | |
483 | */ | |
484 | offset = (4 - (addr & 0x3)) & 0x3; | |
485 | if (offset) { | |
486 | if (data->flags & MMC_DATA_WRITE) { | |
487 | buffer = sdhci_kmap_atomic(sg, &flags); | |
6cefd05f | 488 | WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); |
2134a922 PO |
489 | memcpy(align, buffer, offset); |
490 | sdhci_kunmap_atomic(buffer, &flags); | |
491 | } | |
492 | ||
118cd17d BD |
493 | /* tran, valid */ |
494 | sdhci_set_adma_desc(desc, align_addr, offset, 0x21); | |
2134a922 PO |
495 | |
496 | BUG_ON(offset > 65536); | |
497 | ||
2134a922 PO |
498 | align += 4; |
499 | align_addr += 4; | |
500 | ||
501 | desc += 8; | |
502 | ||
503 | addr += offset; | |
504 | len -= offset; | |
505 | } | |
506 | ||
2134a922 PO |
507 | BUG_ON(len > 65536); |
508 | ||
118cd17d BD |
509 | /* tran, valid */ |
510 | sdhci_set_adma_desc(desc, addr, len, 0x21); | |
2134a922 PO |
511 | desc += 8; |
512 | ||
513 | /* | |
514 | * If this triggers then we have a calculation bug | |
515 | * somewhere. :/ | |
516 | */ | |
517 | WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4); | |
518 | } | |
519 | ||
70764a90 TA |
520 | if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) { |
521 | /* | |
522 | * Mark the last descriptor as the terminating descriptor | |
523 | */ | |
524 | if (desc != host->adma_desc) { | |
525 | desc -= 8; | |
526 | desc[0] |= 0x2; /* end */ | |
527 | } | |
528 | } else { | |
529 | /* | |
530 | * Add a terminating entry. | |
531 | */ | |
2134a922 | 532 | |
70764a90 TA |
533 | /* nop, end, valid */ |
534 | sdhci_set_adma_desc(desc, 0, 0, 0x3); | |
535 | } | |
2134a922 PO |
536 | |
537 | /* | |
538 | * Resync align buffer as we might have changed it. | |
539 | */ | |
540 | if (data->flags & MMC_DATA_WRITE) { | |
541 | dma_sync_single_for_device(mmc_dev(host->mmc), | |
542 | host->align_addr, 128 * 4, direction); | |
543 | } | |
544 | ||
545 | host->adma_addr = dma_map_single(mmc_dev(host->mmc), | |
546 | host->adma_desc, (128 * 2 + 1) * 4, DMA_TO_DEVICE); | |
980167b7 | 547 | if (dma_mapping_error(mmc_dev(host->mmc), host->adma_addr)) |
8f1934ce | 548 | goto unmap_entries; |
2134a922 | 549 | BUG_ON(host->adma_addr & 0x3); |
8f1934ce PO |
550 | |
551 | return 0; | |
552 | ||
553 | unmap_entries: | |
554 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
555 | data->sg_len, direction); | |
556 | unmap_align: | |
557 | dma_unmap_single(mmc_dev(host->mmc), host->align_addr, | |
558 | 128 * 4, direction); | |
559 | fail: | |
560 | return -EINVAL; | |
2134a922 PO |
561 | } |
562 | ||
563 | static void sdhci_adma_table_post(struct sdhci_host *host, | |
564 | struct mmc_data *data) | |
565 | { | |
566 | int direction; | |
567 | ||
568 | struct scatterlist *sg; | |
569 | int i, size; | |
570 | u8 *align; | |
571 | char *buffer; | |
572 | unsigned long flags; | |
573 | ||
574 | if (data->flags & MMC_DATA_READ) | |
575 | direction = DMA_FROM_DEVICE; | |
576 | else | |
577 | direction = DMA_TO_DEVICE; | |
578 | ||
579 | dma_unmap_single(mmc_dev(host->mmc), host->adma_addr, | |
580 | (128 * 2 + 1) * 4, DMA_TO_DEVICE); | |
581 | ||
582 | dma_unmap_single(mmc_dev(host->mmc), host->align_addr, | |
583 | 128 * 4, direction); | |
584 | ||
585 | if (data->flags & MMC_DATA_READ) { | |
586 | dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, | |
587 | data->sg_len, direction); | |
588 | ||
589 | align = host->align_buffer; | |
590 | ||
591 | for_each_sg(data->sg, sg, host->sg_count, i) { | |
592 | if (sg_dma_address(sg) & 0x3) { | |
593 | size = 4 - (sg_dma_address(sg) & 0x3); | |
594 | ||
595 | buffer = sdhci_kmap_atomic(sg, &flags); | |
6cefd05f | 596 | WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); |
2134a922 PO |
597 | memcpy(buffer, align, size); |
598 | sdhci_kunmap_atomic(buffer, &flags); | |
599 | ||
600 | align += 4; | |
601 | } | |
602 | } | |
603 | } | |
604 | ||
605 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
606 | data->sg_len, direction); | |
607 | } | |
608 | ||
a3c7778f | 609 | static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd) |
d129bceb | 610 | { |
1c8cde92 | 611 | u8 count; |
a3c7778f | 612 | struct mmc_data *data = cmd->data; |
1c8cde92 | 613 | unsigned target_timeout, current_timeout; |
d129bceb | 614 | |
ee53ab5d PO |
615 | /* |
616 | * If the host controller provides us with an incorrect timeout | |
617 | * value, just skip the check and use 0xE. The hardware may take | |
618 | * longer to time out, but that's much better than having a too-short | |
619 | * timeout value. | |
620 | */ | |
11a2f1b7 | 621 | if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) |
ee53ab5d | 622 | return 0xE; |
e538fbe8 | 623 | |
a3c7778f AW |
624 | /* Unspecified timeout, assume max */ |
625 | if (!data && !cmd->cmd_timeout_ms) | |
626 | return 0xE; | |
d129bceb | 627 | |
a3c7778f AW |
628 | /* timeout in us */ |
629 | if (!data) | |
630 | target_timeout = cmd->cmd_timeout_ms * 1000; | |
631 | else | |
632 | target_timeout = data->timeout_ns / 1000 + | |
633 | data->timeout_clks / host->clock; | |
81b39802 | 634 | |
4b01681c MB |
635 | if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) |
636 | host->timeout_clk = host->clock / 1000; | |
637 | ||
1c8cde92 PO |
638 | /* |
639 | * Figure out needed cycles. | |
640 | * We do this in steps in order to fit inside a 32 bit int. | |
641 | * The first step is the minimum timeout, which will have a | |
642 | * minimum resolution of 6 bits: | |
643 | * (1) 2^13*1000 > 2^22, | |
644 | * (2) host->timeout_clk < 2^16 | |
645 | * => | |
646 | * (1) / (2) > 2^6 | |
647 | */ | |
4b01681c | 648 | BUG_ON(!host->timeout_clk); |
1c8cde92 PO |
649 | count = 0; |
650 | current_timeout = (1 << 13) * 1000 / host->timeout_clk; | |
651 | while (current_timeout < target_timeout) { | |
652 | count++; | |
653 | current_timeout <<= 1; | |
654 | if (count >= 0xF) | |
655 | break; | |
656 | } | |
657 | ||
658 | if (count >= 0xF) { | |
a3c7778f AW |
659 | printk(KERN_WARNING "%s: Too large timeout requested for CMD%d!\n", |
660 | mmc_hostname(host->mmc), cmd->opcode); | |
1c8cde92 PO |
661 | count = 0xE; |
662 | } | |
663 | ||
ee53ab5d PO |
664 | return count; |
665 | } | |
666 | ||
6aa943ab AV |
667 | static void sdhci_set_transfer_irqs(struct sdhci_host *host) |
668 | { | |
669 | u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL; | |
670 | u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR; | |
671 | ||
672 | if (host->flags & SDHCI_REQ_USE_DMA) | |
673 | sdhci_clear_set_irqs(host, pio_irqs, dma_irqs); | |
674 | else | |
675 | sdhci_clear_set_irqs(host, dma_irqs, pio_irqs); | |
676 | } | |
677 | ||
a3c7778f | 678 | static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) |
ee53ab5d PO |
679 | { |
680 | u8 count; | |
2134a922 | 681 | u8 ctrl; |
a3c7778f | 682 | struct mmc_data *data = cmd->data; |
8f1934ce | 683 | int ret; |
ee53ab5d PO |
684 | |
685 | WARN_ON(host->data); | |
686 | ||
a3c7778f AW |
687 | if (data || (cmd->flags & MMC_RSP_BUSY)) { |
688 | count = sdhci_calc_timeout(host, cmd); | |
689 | sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); | |
690 | } | |
691 | ||
692 | if (!data) | |
ee53ab5d PO |
693 | return; |
694 | ||
695 | /* Sanity checks */ | |
696 | BUG_ON(data->blksz * data->blocks > 524288); | |
697 | BUG_ON(data->blksz > host->mmc->max_blk_size); | |
698 | BUG_ON(data->blocks > 65535); | |
699 | ||
700 | host->data = data; | |
701 | host->data_early = 0; | |
f6a03cbf | 702 | host->data->bytes_xfered = 0; |
ee53ab5d | 703 | |
a13abc7b | 704 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) |
c9fddbc4 PO |
705 | host->flags |= SDHCI_REQ_USE_DMA; |
706 | ||
2134a922 PO |
707 | /* |
708 | * FIXME: This doesn't account for merging when mapping the | |
709 | * scatterlist. | |
710 | */ | |
711 | if (host->flags & SDHCI_REQ_USE_DMA) { | |
712 | int broken, i; | |
713 | struct scatterlist *sg; | |
714 | ||
715 | broken = 0; | |
716 | if (host->flags & SDHCI_USE_ADMA) { | |
717 | if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) | |
718 | broken = 1; | |
719 | } else { | |
720 | if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) | |
721 | broken = 1; | |
722 | } | |
723 | ||
724 | if (unlikely(broken)) { | |
725 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
726 | if (sg->length & 0x3) { | |
727 | DBG("Reverting to PIO because of " | |
728 | "transfer size (%d)\n", | |
729 | sg->length); | |
730 | host->flags &= ~SDHCI_REQ_USE_DMA; | |
731 | break; | |
732 | } | |
733 | } | |
734 | } | |
c9fddbc4 PO |
735 | } |
736 | ||
737 | /* | |
738 | * The assumption here being that alignment is the same after | |
739 | * translation to device address space. | |
740 | */ | |
2134a922 PO |
741 | if (host->flags & SDHCI_REQ_USE_DMA) { |
742 | int broken, i; | |
743 | struct scatterlist *sg; | |
744 | ||
745 | broken = 0; | |
746 | if (host->flags & SDHCI_USE_ADMA) { | |
747 | /* | |
748 | * As we use 3 byte chunks to work around | |
749 | * alignment problems, we need to check this | |
750 | * quirk. | |
751 | */ | |
752 | if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) | |
753 | broken = 1; | |
754 | } else { | |
755 | if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) | |
756 | broken = 1; | |
757 | } | |
758 | ||
759 | if (unlikely(broken)) { | |
760 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
761 | if (sg->offset & 0x3) { | |
762 | DBG("Reverting to PIO because of " | |
763 | "bad alignment\n"); | |
764 | host->flags &= ~SDHCI_REQ_USE_DMA; | |
765 | break; | |
766 | } | |
767 | } | |
768 | } | |
769 | } | |
770 | ||
8f1934ce PO |
771 | if (host->flags & SDHCI_REQ_USE_DMA) { |
772 | if (host->flags & SDHCI_USE_ADMA) { | |
773 | ret = sdhci_adma_table_pre(host, data); | |
774 | if (ret) { | |
775 | /* | |
776 | * This only happens when someone fed | |
777 | * us an invalid request. | |
778 | */ | |
779 | WARN_ON(1); | |
ebd6d357 | 780 | host->flags &= ~SDHCI_REQ_USE_DMA; |
8f1934ce | 781 | } else { |
4e4141a5 AV |
782 | sdhci_writel(host, host->adma_addr, |
783 | SDHCI_ADMA_ADDRESS); | |
8f1934ce PO |
784 | } |
785 | } else { | |
c8b3e02e | 786 | int sg_cnt; |
8f1934ce | 787 | |
c8b3e02e | 788 | sg_cnt = dma_map_sg(mmc_dev(host->mmc), |
8f1934ce PO |
789 | data->sg, data->sg_len, |
790 | (data->flags & MMC_DATA_READ) ? | |
791 | DMA_FROM_DEVICE : | |
792 | DMA_TO_DEVICE); | |
c8b3e02e | 793 | if (sg_cnt == 0) { |
8f1934ce PO |
794 | /* |
795 | * This only happens when someone fed | |
796 | * us an invalid request. | |
797 | */ | |
798 | WARN_ON(1); | |
ebd6d357 | 799 | host->flags &= ~SDHCI_REQ_USE_DMA; |
8f1934ce | 800 | } else { |
719a61b4 | 801 | WARN_ON(sg_cnt != 1); |
4e4141a5 AV |
802 | sdhci_writel(host, sg_dma_address(data->sg), |
803 | SDHCI_DMA_ADDRESS); | |
8f1934ce PO |
804 | } |
805 | } | |
806 | } | |
807 | ||
2134a922 PO |
808 | /* |
809 | * Always adjust the DMA selection as some controllers | |
810 | * (e.g. JMicron) can't do PIO properly when the selection | |
811 | * is ADMA. | |
812 | */ | |
813 | if (host->version >= SDHCI_SPEC_200) { | |
4e4141a5 | 814 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
2134a922 PO |
815 | ctrl &= ~SDHCI_CTRL_DMA_MASK; |
816 | if ((host->flags & SDHCI_REQ_USE_DMA) && | |
817 | (host->flags & SDHCI_USE_ADMA)) | |
818 | ctrl |= SDHCI_CTRL_ADMA32; | |
819 | else | |
820 | ctrl |= SDHCI_CTRL_SDMA; | |
4e4141a5 | 821 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
c9fddbc4 PO |
822 | } |
823 | ||
8f1934ce | 824 | if (!(host->flags & SDHCI_REQ_USE_DMA)) { |
da60a91d SAS |
825 | int flags; |
826 | ||
827 | flags = SG_MITER_ATOMIC; | |
828 | if (host->data->flags & MMC_DATA_READ) | |
829 | flags |= SG_MITER_TO_SG; | |
830 | else | |
831 | flags |= SG_MITER_FROM_SG; | |
832 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
7659150c | 833 | host->blocks = data->blocks; |
d129bceb | 834 | } |
c7fa9963 | 835 | |
6aa943ab AV |
836 | sdhci_set_transfer_irqs(host); |
837 | ||
f6a03cbf MV |
838 | /* Set the DMA boundary value and block size */ |
839 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, | |
840 | data->blksz), SDHCI_BLOCK_SIZE); | |
4e4141a5 | 841 | sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT); |
c7fa9963 PO |
842 | } |
843 | ||
844 | static void sdhci_set_transfer_mode(struct sdhci_host *host, | |
e89d456f | 845 | struct mmc_command *cmd) |
c7fa9963 PO |
846 | { |
847 | u16 mode; | |
e89d456f | 848 | struct mmc_data *data = cmd->data; |
c7fa9963 | 849 | |
c7fa9963 PO |
850 | if (data == NULL) |
851 | return; | |
852 | ||
e538fbe8 PO |
853 | WARN_ON(!host->data); |
854 | ||
c7fa9963 | 855 | mode = SDHCI_TRNS_BLK_CNT_EN; |
e89d456f AW |
856 | if (mmc_op_multi(cmd->opcode) || data->blocks > 1) { |
857 | mode |= SDHCI_TRNS_MULTI; | |
858 | /* | |
859 | * If we are sending CMD23, CMD12 never gets sent | |
860 | * on successful completion (so no Auto-CMD12). | |
861 | */ | |
862 | if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) | |
863 | mode |= SDHCI_TRNS_AUTO_CMD12; | |
8edf6371 AW |
864 | else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) { |
865 | mode |= SDHCI_TRNS_AUTO_CMD23; | |
866 | sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2); | |
867 | } | |
c4512f79 | 868 | } |
8edf6371 | 869 | |
c7fa9963 PO |
870 | if (data->flags & MMC_DATA_READ) |
871 | mode |= SDHCI_TRNS_READ; | |
c9fddbc4 | 872 | if (host->flags & SDHCI_REQ_USE_DMA) |
c7fa9963 PO |
873 | mode |= SDHCI_TRNS_DMA; |
874 | ||
4e4141a5 | 875 | sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); |
d129bceb PO |
876 | } |
877 | ||
878 | static void sdhci_finish_data(struct sdhci_host *host) | |
879 | { | |
880 | struct mmc_data *data; | |
d129bceb PO |
881 | |
882 | BUG_ON(!host->data); | |
883 | ||
884 | data = host->data; | |
885 | host->data = NULL; | |
886 | ||
c9fddbc4 | 887 | if (host->flags & SDHCI_REQ_USE_DMA) { |
2134a922 PO |
888 | if (host->flags & SDHCI_USE_ADMA) |
889 | sdhci_adma_table_post(host, data); | |
890 | else { | |
891 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
892 | data->sg_len, (data->flags & MMC_DATA_READ) ? | |
893 | DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
894 | } | |
d129bceb PO |
895 | } |
896 | ||
897 | /* | |
c9b74c5b PO |
898 | * The specification states that the block count register must |
899 | * be updated, but it does not specify at what point in the | |
900 | * data flow. That makes the register entirely useless to read | |
901 | * back so we have to assume that nothing made it to the card | |
902 | * in the event of an error. | |
d129bceb | 903 | */ |
c9b74c5b PO |
904 | if (data->error) |
905 | data->bytes_xfered = 0; | |
d129bceb | 906 | else |
c9b74c5b | 907 | data->bytes_xfered = data->blksz * data->blocks; |
d129bceb | 908 | |
e89d456f AW |
909 | /* |
910 | * Need to send CMD12 if - | |
911 | * a) open-ended multiblock transfer (no CMD23) | |
912 | * b) error in multiblock transfer | |
913 | */ | |
914 | if (data->stop && | |
915 | (data->error || | |
916 | !host->mrq->sbc)) { | |
917 | ||
d129bceb PO |
918 | /* |
919 | * The controller needs a reset of internal state machines | |
920 | * upon error conditions. | |
921 | */ | |
17b0429d | 922 | if (data->error) { |
d129bceb PO |
923 | sdhci_reset(host, SDHCI_RESET_CMD); |
924 | sdhci_reset(host, SDHCI_RESET_DATA); | |
925 | } | |
926 | ||
927 | sdhci_send_command(host, data->stop); | |
928 | } else | |
929 | tasklet_schedule(&host->finish_tasklet); | |
930 | } | |
931 | ||
932 | static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) | |
933 | { | |
934 | int flags; | |
fd2208d7 | 935 | u32 mask; |
7cb2c76f | 936 | unsigned long timeout; |
d129bceb PO |
937 | |
938 | WARN_ON(host->cmd); | |
939 | ||
d129bceb | 940 | /* Wait max 10 ms */ |
7cb2c76f | 941 | timeout = 10; |
fd2208d7 PO |
942 | |
943 | mask = SDHCI_CMD_INHIBIT; | |
944 | if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY)) | |
945 | mask |= SDHCI_DATA_INHIBIT; | |
946 | ||
947 | /* We shouldn't wait for data inihibit for stop commands, even | |
948 | though they might use busy signaling */ | |
949 | if (host->mrq->data && (cmd == host->mrq->data->stop)) | |
950 | mask &= ~SDHCI_DATA_INHIBIT; | |
951 | ||
4e4141a5 | 952 | while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
7cb2c76f | 953 | if (timeout == 0) { |
d129bceb | 954 | printk(KERN_ERR "%s: Controller never released " |
acf1da45 | 955 | "inhibit bit(s).\n", mmc_hostname(host->mmc)); |
d129bceb | 956 | sdhci_dumpregs(host); |
17b0429d | 957 | cmd->error = -EIO; |
d129bceb PO |
958 | tasklet_schedule(&host->finish_tasklet); |
959 | return; | |
960 | } | |
7cb2c76f PO |
961 | timeout--; |
962 | mdelay(1); | |
963 | } | |
d129bceb PO |
964 | |
965 | mod_timer(&host->timer, jiffies + 10 * HZ); | |
966 | ||
967 | host->cmd = cmd; | |
968 | ||
a3c7778f | 969 | sdhci_prepare_data(host, cmd); |
d129bceb | 970 | |
4e4141a5 | 971 | sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT); |
d129bceb | 972 | |
e89d456f | 973 | sdhci_set_transfer_mode(host, cmd); |
c7fa9963 | 974 | |
d129bceb | 975 | if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { |
acf1da45 | 976 | printk(KERN_ERR "%s: Unsupported response type!\n", |
d129bceb | 977 | mmc_hostname(host->mmc)); |
17b0429d | 978 | cmd->error = -EINVAL; |
d129bceb PO |
979 | tasklet_schedule(&host->finish_tasklet); |
980 | return; | |
981 | } | |
982 | ||
983 | if (!(cmd->flags & MMC_RSP_PRESENT)) | |
984 | flags = SDHCI_CMD_RESP_NONE; | |
985 | else if (cmd->flags & MMC_RSP_136) | |
986 | flags = SDHCI_CMD_RESP_LONG; | |
987 | else if (cmd->flags & MMC_RSP_BUSY) | |
988 | flags = SDHCI_CMD_RESP_SHORT_BUSY; | |
989 | else | |
990 | flags = SDHCI_CMD_RESP_SHORT; | |
991 | ||
992 | if (cmd->flags & MMC_RSP_CRC) | |
993 | flags |= SDHCI_CMD_CRC; | |
994 | if (cmd->flags & MMC_RSP_OPCODE) | |
995 | flags |= SDHCI_CMD_INDEX; | |
b513ea25 AN |
996 | |
997 | /* CMD19 is special in that the Data Present Select should be set */ | |
998 | if (cmd->data || (cmd->opcode == MMC_SEND_TUNING_BLOCK)) | |
d129bceb PO |
999 | flags |= SDHCI_CMD_DATA; |
1000 | ||
4e4141a5 | 1001 | sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND); |
d129bceb PO |
1002 | } |
1003 | ||
1004 | static void sdhci_finish_command(struct sdhci_host *host) | |
1005 | { | |
1006 | int i; | |
1007 | ||
1008 | BUG_ON(host->cmd == NULL); | |
1009 | ||
1010 | if (host->cmd->flags & MMC_RSP_PRESENT) { | |
1011 | if (host->cmd->flags & MMC_RSP_136) { | |
1012 | /* CRC is stripped so we need to do some shifting. */ | |
1013 | for (i = 0;i < 4;i++) { | |
4e4141a5 | 1014 | host->cmd->resp[i] = sdhci_readl(host, |
d129bceb PO |
1015 | SDHCI_RESPONSE + (3-i)*4) << 8; |
1016 | if (i != 3) | |
1017 | host->cmd->resp[i] |= | |
4e4141a5 | 1018 | sdhci_readb(host, |
d129bceb PO |
1019 | SDHCI_RESPONSE + (3-i)*4-1); |
1020 | } | |
1021 | } else { | |
4e4141a5 | 1022 | host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE); |
d129bceb PO |
1023 | } |
1024 | } | |
1025 | ||
17b0429d | 1026 | host->cmd->error = 0; |
d129bceb | 1027 | |
e89d456f AW |
1028 | /* Finished CMD23, now send actual command. */ |
1029 | if (host->cmd == host->mrq->sbc) { | |
1030 | host->cmd = NULL; | |
1031 | sdhci_send_command(host, host->mrq->cmd); | |
1032 | } else { | |
e538fbe8 | 1033 | |
e89d456f AW |
1034 | /* Processed actual command. */ |
1035 | if (host->data && host->data_early) | |
1036 | sdhci_finish_data(host); | |
d129bceb | 1037 | |
e89d456f AW |
1038 | if (!host->cmd->data) |
1039 | tasklet_schedule(&host->finish_tasklet); | |
1040 | ||
1041 | host->cmd = NULL; | |
1042 | } | |
d129bceb PO |
1043 | } |
1044 | ||
1045 | static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) | |
1046 | { | |
c3ed3877 AN |
1047 | int div = 0; /* Initialized for compiler warning */ |
1048 | u16 clk = 0; | |
7cb2c76f | 1049 | unsigned long timeout; |
d129bceb PO |
1050 | |
1051 | if (clock == host->clock) | |
1052 | return; | |
1053 | ||
8114634c AV |
1054 | if (host->ops->set_clock) { |
1055 | host->ops->set_clock(host, clock); | |
1056 | if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) | |
1057 | return; | |
1058 | } | |
1059 | ||
4e4141a5 | 1060 | sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); |
d129bceb PO |
1061 | |
1062 | if (clock == 0) | |
1063 | goto out; | |
1064 | ||
85105c53 | 1065 | if (host->version >= SDHCI_SPEC_300) { |
c3ed3877 AN |
1066 | /* |
1067 | * Check if the Host Controller supports Programmable Clock | |
1068 | * Mode. | |
1069 | */ | |
1070 | if (host->clk_mul) { | |
1071 | u16 ctrl; | |
1072 | ||
1073 | /* | |
1074 | * We need to figure out whether the Host Driver needs | |
1075 | * to select Programmable Clock Mode, or the value can | |
1076 | * be set automatically by the Host Controller based on | |
1077 | * the Preset Value registers. | |
1078 | */ | |
1079 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1080 | if (!(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { | |
1081 | for (div = 1; div <= 1024; div++) { | |
1082 | if (((host->max_clk * host->clk_mul) / | |
1083 | div) <= clock) | |
1084 | break; | |
1085 | } | |
1086 | /* | |
1087 | * Set Programmable Clock Mode in the Clock | |
1088 | * Control register. | |
1089 | */ | |
1090 | clk = SDHCI_PROG_CLOCK_MODE; | |
1091 | div--; | |
1092 | } | |
1093 | } else { | |
1094 | /* Version 3.00 divisors must be a multiple of 2. */ | |
1095 | if (host->max_clk <= clock) | |
1096 | div = 1; | |
1097 | else { | |
1098 | for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; | |
1099 | div += 2) { | |
1100 | if ((host->max_clk / div) <= clock) | |
1101 | break; | |
1102 | } | |
85105c53 | 1103 | } |
c3ed3877 | 1104 | div >>= 1; |
85105c53 ZG |
1105 | } |
1106 | } else { | |
1107 | /* Version 2.00 divisors must be a power of 2. */ | |
0397526d | 1108 | for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) { |
85105c53 ZG |
1109 | if ((host->max_clk / div) <= clock) |
1110 | break; | |
1111 | } | |
c3ed3877 | 1112 | div >>= 1; |
d129bceb | 1113 | } |
d129bceb | 1114 | |
c3ed3877 | 1115 | clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; |
85105c53 ZG |
1116 | clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) |
1117 | << SDHCI_DIVIDER_HI_SHIFT; | |
d129bceb | 1118 | clk |= SDHCI_CLOCK_INT_EN; |
4e4141a5 | 1119 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
d129bceb | 1120 | |
27f6cb16 CB |
1121 | /* Wait max 20 ms */ |
1122 | timeout = 20; | |
4e4141a5 | 1123 | while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) |
7cb2c76f PO |
1124 | & SDHCI_CLOCK_INT_STABLE)) { |
1125 | if (timeout == 0) { | |
acf1da45 PO |
1126 | printk(KERN_ERR "%s: Internal clock never " |
1127 | "stabilised.\n", mmc_hostname(host->mmc)); | |
d129bceb PO |
1128 | sdhci_dumpregs(host); |
1129 | return; | |
1130 | } | |
7cb2c76f PO |
1131 | timeout--; |
1132 | mdelay(1); | |
1133 | } | |
d129bceb PO |
1134 | |
1135 | clk |= SDHCI_CLOCK_CARD_EN; | |
4e4141a5 | 1136 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
d129bceb PO |
1137 | |
1138 | out: | |
1139 | host->clock = clock; | |
1140 | } | |
1141 | ||
146ad66e PO |
1142 | static void sdhci_set_power(struct sdhci_host *host, unsigned short power) |
1143 | { | |
8364248a | 1144 | u8 pwr = 0; |
146ad66e | 1145 | |
8364248a | 1146 | if (power != (unsigned short)-1) { |
ae628903 PO |
1147 | switch (1 << power) { |
1148 | case MMC_VDD_165_195: | |
1149 | pwr = SDHCI_POWER_180; | |
1150 | break; | |
1151 | case MMC_VDD_29_30: | |
1152 | case MMC_VDD_30_31: | |
1153 | pwr = SDHCI_POWER_300; | |
1154 | break; | |
1155 | case MMC_VDD_32_33: | |
1156 | case MMC_VDD_33_34: | |
1157 | pwr = SDHCI_POWER_330; | |
1158 | break; | |
1159 | default: | |
1160 | BUG(); | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | if (host->pwr == pwr) | |
146ad66e PO |
1165 | return; |
1166 | ||
ae628903 PO |
1167 | host->pwr = pwr; |
1168 | ||
1169 | if (pwr == 0) { | |
4e4141a5 | 1170 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
ae628903 | 1171 | return; |
9e9dc5f2 DS |
1172 | } |
1173 | ||
1174 | /* | |
1175 | * Spec says that we should clear the power reg before setting | |
1176 | * a new value. Some controllers don't seem to like this though. | |
1177 | */ | |
b8c86fc5 | 1178 | if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE)) |
4e4141a5 | 1179 | sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
146ad66e | 1180 | |
e08c1694 | 1181 | /* |
c71f6512 | 1182 | * At least the Marvell CaFe chip gets confused if we set the voltage |
e08c1694 AS |
1183 | * and set turn on power at the same time, so set the voltage first. |
1184 | */ | |
11a2f1b7 | 1185 | if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) |
ae628903 | 1186 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
e08c1694 | 1187 | |
ae628903 | 1188 | pwr |= SDHCI_POWER_ON; |
146ad66e | 1189 | |
ae628903 | 1190 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
557b0697 HW |
1191 | |
1192 | /* | |
1193 | * Some controllers need an extra 10ms delay of 10ms before they | |
1194 | * can apply clock after applying power | |
1195 | */ | |
11a2f1b7 | 1196 | if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) |
557b0697 | 1197 | mdelay(10); |
146ad66e PO |
1198 | } |
1199 | ||
d129bceb PO |
1200 | /*****************************************************************************\ |
1201 | * * | |
1202 | * MMC callbacks * | |
1203 | * * | |
1204 | \*****************************************************************************/ | |
1205 | ||
1206 | static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1207 | { | |
1208 | struct sdhci_host *host; | |
68d1fb7e | 1209 | bool present; |
d129bceb PO |
1210 | unsigned long flags; |
1211 | ||
1212 | host = mmc_priv(mmc); | |
1213 | ||
1214 | spin_lock_irqsave(&host->lock, flags); | |
1215 | ||
1216 | WARN_ON(host->mrq != NULL); | |
1217 | ||
f9134319 | 1218 | #ifndef SDHCI_USE_LEDS_CLASS |
d129bceb | 1219 | sdhci_activate_led(host); |
2f730fec | 1220 | #endif |
e89d456f AW |
1221 | |
1222 | /* | |
1223 | * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED | |
1224 | * requests if Auto-CMD12 is enabled. | |
1225 | */ | |
1226 | if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) { | |
c4512f79 JH |
1227 | if (mrq->stop) { |
1228 | mrq->data->stop = NULL; | |
1229 | mrq->stop = NULL; | |
1230 | } | |
1231 | } | |
d129bceb PO |
1232 | |
1233 | host->mrq = mrq; | |
1234 | ||
68d1fb7e AV |
1235 | /* If polling, assume that the card is always present. */ |
1236 | if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) | |
1237 | present = true; | |
1238 | else | |
1239 | present = sdhci_readl(host, SDHCI_PRESENT_STATE) & | |
1240 | SDHCI_CARD_PRESENT; | |
1241 | ||
1242 | if (!present || host->flags & SDHCI_DEVICE_DEAD) { | |
17b0429d | 1243 | host->mrq->cmd->error = -ENOMEDIUM; |
d129bceb | 1244 | tasklet_schedule(&host->finish_tasklet); |
cf2b5eea AN |
1245 | } else { |
1246 | u32 present_state; | |
1247 | ||
1248 | present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); | |
1249 | /* | |
1250 | * Check if the re-tuning timer has already expired and there | |
1251 | * is no on-going data transfer. If so, we need to execute | |
1252 | * tuning procedure before sending command. | |
1253 | */ | |
1254 | if ((host->flags & SDHCI_NEEDS_RETUNING) && | |
1255 | !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) { | |
1256 | spin_unlock_irqrestore(&host->lock, flags); | |
1257 | sdhci_execute_tuning(mmc); | |
1258 | spin_lock_irqsave(&host->lock, flags); | |
1259 | ||
1260 | /* Restore original mmc_request structure */ | |
1261 | host->mrq = mrq; | |
1262 | } | |
1263 | ||
8edf6371 | 1264 | if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23)) |
e89d456f AW |
1265 | sdhci_send_command(host, mrq->sbc); |
1266 | else | |
1267 | sdhci_send_command(host, mrq->cmd); | |
cf2b5eea | 1268 | } |
d129bceb | 1269 | |
5f25a66f | 1270 | mmiowb(); |
d129bceb PO |
1271 | spin_unlock_irqrestore(&host->lock, flags); |
1272 | } | |
1273 | ||
1274 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1275 | { | |
1276 | struct sdhci_host *host; | |
1277 | unsigned long flags; | |
1278 | u8 ctrl; | |
1279 | ||
1280 | host = mmc_priv(mmc); | |
1281 | ||
1282 | spin_lock_irqsave(&host->lock, flags); | |
1283 | ||
1e72859e PO |
1284 | if (host->flags & SDHCI_DEVICE_DEAD) |
1285 | goto out; | |
1286 | ||
d129bceb PO |
1287 | /* |
1288 | * Reset the chip on each power off. | |
1289 | * Should clear out any weird states. | |
1290 | */ | |
1291 | if (ios->power_mode == MMC_POWER_OFF) { | |
4e4141a5 | 1292 | sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); |
7260cf5e | 1293 | sdhci_reinit(host); |
d129bceb PO |
1294 | } |
1295 | ||
1296 | sdhci_set_clock(host, ios->clock); | |
1297 | ||
1298 | if (ios->power_mode == MMC_POWER_OFF) | |
146ad66e | 1299 | sdhci_set_power(host, -1); |
d129bceb | 1300 | else |
146ad66e | 1301 | sdhci_set_power(host, ios->vdd); |
d129bceb | 1302 | |
643a81ff PR |
1303 | if (host->ops->platform_send_init_74_clocks) |
1304 | host->ops->platform_send_init_74_clocks(host, ios->power_mode); | |
1305 | ||
15ec4461 PR |
1306 | /* |
1307 | * If your platform has 8-bit width support but is not a v3 controller, | |
1308 | * or if it requires special setup code, you should implement that in | |
1309 | * platform_8bit_width(). | |
1310 | */ | |
1311 | if (host->ops->platform_8bit_width) | |
1312 | host->ops->platform_8bit_width(host, ios->bus_width); | |
1313 | else { | |
1314 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); | |
1315 | if (ios->bus_width == MMC_BUS_WIDTH_8) { | |
1316 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
1317 | if (host->version >= SDHCI_SPEC_300) | |
1318 | ctrl |= SDHCI_CTRL_8BITBUS; | |
1319 | } else { | |
1320 | if (host->version >= SDHCI_SPEC_300) | |
1321 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
1322 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
1323 | ctrl |= SDHCI_CTRL_4BITBUS; | |
1324 | else | |
1325 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
1326 | } | |
1327 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
1328 | } | |
ae6d6c92 | 1329 | |
15ec4461 | 1330 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
cd9277c0 | 1331 | |
3ab9c8da PR |
1332 | if ((ios->timing == MMC_TIMING_SD_HS || |
1333 | ios->timing == MMC_TIMING_MMC_HS) | |
1334 | && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)) | |
cd9277c0 PO |
1335 | ctrl |= SDHCI_CTRL_HISPD; |
1336 | else | |
1337 | ctrl &= ~SDHCI_CTRL_HISPD; | |
1338 | ||
d6d50a15 | 1339 | if (host->version >= SDHCI_SPEC_300) { |
49c468fc AN |
1340 | u16 clk, ctrl_2; |
1341 | unsigned int clock; | |
1342 | ||
1343 | /* In case of UHS-I modes, set High Speed Enable */ | |
1344 | if ((ios->timing == MMC_TIMING_UHS_SDR50) || | |
1345 | (ios->timing == MMC_TIMING_UHS_SDR104) || | |
1346 | (ios->timing == MMC_TIMING_UHS_DDR50) || | |
1347 | (ios->timing == MMC_TIMING_UHS_SDR25) || | |
1348 | (ios->timing == MMC_TIMING_UHS_SDR12)) | |
1349 | ctrl |= SDHCI_CTRL_HISPD; | |
d6d50a15 AN |
1350 | |
1351 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1352 | if (!(ctrl_2 & SDHCI_CTRL_PRESET_VAL_ENABLE)) { | |
758535c4 | 1353 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
d6d50a15 AN |
1354 | /* |
1355 | * We only need to set Driver Strength if the | |
1356 | * preset value enable is not set. | |
1357 | */ | |
1358 | ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK; | |
1359 | if (ios->drv_type == MMC_SET_DRIVER_TYPE_A) | |
1360 | ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A; | |
1361 | else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C) | |
1362 | ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C; | |
1363 | ||
1364 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); | |
758535c4 AN |
1365 | } else { |
1366 | /* | |
1367 | * According to SDHC Spec v3.00, if the Preset Value | |
1368 | * Enable in the Host Control 2 register is set, we | |
1369 | * need to reset SD Clock Enable before changing High | |
1370 | * Speed Enable to avoid generating clock gliches. | |
1371 | */ | |
758535c4 AN |
1372 | |
1373 | /* Reset SD Clock Enable */ | |
1374 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1375 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1376 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1377 | ||
1378 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
1379 | ||
1380 | /* Re-enable SD Clock */ | |
1381 | clock = host->clock; | |
1382 | host->clock = 0; | |
1383 | sdhci_set_clock(host, clock); | |
d6d50a15 | 1384 | } |
49c468fc | 1385 | |
49c468fc AN |
1386 | |
1387 | /* Reset SD Clock Enable */ | |
1388 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1389 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1390 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1391 | ||
6322cdd0 PR |
1392 | if (host->ops->set_uhs_signaling) |
1393 | host->ops->set_uhs_signaling(host, ios->timing); | |
1394 | else { | |
1395 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1396 | /* Select Bus Speed Mode for host */ | |
1397 | ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; | |
1398 | if (ios->timing == MMC_TIMING_UHS_SDR12) | |
1399 | ctrl_2 |= SDHCI_CTRL_UHS_SDR12; | |
1400 | else if (ios->timing == MMC_TIMING_UHS_SDR25) | |
1401 | ctrl_2 |= SDHCI_CTRL_UHS_SDR25; | |
1402 | else if (ios->timing == MMC_TIMING_UHS_SDR50) | |
1403 | ctrl_2 |= SDHCI_CTRL_UHS_SDR50; | |
1404 | else if (ios->timing == MMC_TIMING_UHS_SDR104) | |
1405 | ctrl_2 |= SDHCI_CTRL_UHS_SDR104; | |
1406 | else if (ios->timing == MMC_TIMING_UHS_DDR50) | |
1407 | ctrl_2 |= SDHCI_CTRL_UHS_DDR50; | |
1408 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); | |
1409 | } | |
49c468fc AN |
1410 | |
1411 | /* Re-enable SD Clock */ | |
1412 | clock = host->clock; | |
1413 | host->clock = 0; | |
1414 | sdhci_set_clock(host, clock); | |
758535c4 AN |
1415 | } else |
1416 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
d6d50a15 | 1417 | |
b8352260 LD |
1418 | /* |
1419 | * Some (ENE) controllers go apeshit on some ios operation, | |
1420 | * signalling timeout and CRC errors even on CMD0. Resetting | |
1421 | * it on each ios seems to solve the problem. | |
1422 | */ | |
b8c86fc5 | 1423 | if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS) |
b8352260 LD |
1424 | sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); |
1425 | ||
1e72859e | 1426 | out: |
5f25a66f | 1427 | mmiowb(); |
d129bceb PO |
1428 | spin_unlock_irqrestore(&host->lock, flags); |
1429 | } | |
1430 | ||
82b0e23a | 1431 | static int check_ro(struct sdhci_host *host) |
d129bceb | 1432 | { |
d129bceb | 1433 | unsigned long flags; |
2dfb579c | 1434 | int is_readonly; |
d129bceb | 1435 | |
d129bceb PO |
1436 | spin_lock_irqsave(&host->lock, flags); |
1437 | ||
1e72859e | 1438 | if (host->flags & SDHCI_DEVICE_DEAD) |
2dfb579c WS |
1439 | is_readonly = 0; |
1440 | else if (host->ops->get_ro) | |
1441 | is_readonly = host->ops->get_ro(host); | |
1e72859e | 1442 | else |
2dfb579c WS |
1443 | is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE) |
1444 | & SDHCI_WRITE_PROTECT); | |
d129bceb PO |
1445 | |
1446 | spin_unlock_irqrestore(&host->lock, flags); | |
1447 | ||
2dfb579c WS |
1448 | /* This quirk needs to be replaced by a callback-function later */ |
1449 | return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ? | |
1450 | !is_readonly : is_readonly; | |
d129bceb PO |
1451 | } |
1452 | ||
82b0e23a TI |
1453 | #define SAMPLE_COUNT 5 |
1454 | ||
1455 | static int sdhci_get_ro(struct mmc_host *mmc) | |
1456 | { | |
1457 | struct sdhci_host *host; | |
1458 | int i, ro_count; | |
1459 | ||
1460 | host = mmc_priv(mmc); | |
1461 | ||
1462 | if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT)) | |
1463 | return check_ro(host); | |
1464 | ||
1465 | ro_count = 0; | |
1466 | for (i = 0; i < SAMPLE_COUNT; i++) { | |
1467 | if (check_ro(host)) { | |
1468 | if (++ro_count > SAMPLE_COUNT / 2) | |
1469 | return 1; | |
1470 | } | |
1471 | msleep(30); | |
1472 | } | |
1473 | return 0; | |
1474 | } | |
1475 | ||
f75979b7 PO |
1476 | static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) |
1477 | { | |
1478 | struct sdhci_host *host; | |
1479 | unsigned long flags; | |
f75979b7 PO |
1480 | |
1481 | host = mmc_priv(mmc); | |
1482 | ||
1483 | spin_lock_irqsave(&host->lock, flags); | |
1484 | ||
1e72859e PO |
1485 | if (host->flags & SDHCI_DEVICE_DEAD) |
1486 | goto out; | |
1487 | ||
f75979b7 | 1488 | if (enable) |
7260cf5e AV |
1489 | sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT); |
1490 | else | |
1491 | sdhci_mask_irqs(host, SDHCI_INT_CARD_INT); | |
1e72859e | 1492 | out: |
f75979b7 PO |
1493 | mmiowb(); |
1494 | ||
1495 | spin_unlock_irqrestore(&host->lock, flags); | |
1496 | } | |
1497 | ||
f2119df6 AN |
1498 | static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, |
1499 | struct mmc_ios *ios) | |
1500 | { | |
1501 | struct sdhci_host *host; | |
1502 | u8 pwr; | |
1503 | u16 clk, ctrl; | |
1504 | u32 present_state; | |
1505 | ||
1506 | host = mmc_priv(mmc); | |
1507 | ||
1508 | /* | |
1509 | * Signal Voltage Switching is only applicable for Host Controllers | |
1510 | * v3.00 and above. | |
1511 | */ | |
1512 | if (host->version < SDHCI_SPEC_300) | |
1513 | return 0; | |
1514 | ||
1515 | /* | |
1516 | * We first check whether the request is to set signalling voltage | |
1517 | * to 3.3V. If so, we change the voltage to 3.3V and return quickly. | |
1518 | */ | |
1519 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1520 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { | |
1521 | /* Set 1.8V Signal Enable in the Host Control2 register to 0 */ | |
1522 | ctrl &= ~SDHCI_CTRL_VDD_180; | |
1523 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1524 | ||
1525 | /* Wait for 5ms */ | |
1526 | usleep_range(5000, 5500); | |
1527 | ||
1528 | /* 3.3V regulator output should be stable within 5 ms */ | |
1529 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1530 | if (!(ctrl & SDHCI_CTRL_VDD_180)) | |
1531 | return 0; | |
1532 | else { | |
1533 | printk(KERN_INFO DRIVER_NAME ": Switching to 3.3V " | |
1534 | "signalling voltage failed\n"); | |
1535 | return -EIO; | |
1536 | } | |
1537 | } else if (!(ctrl & SDHCI_CTRL_VDD_180) && | |
1538 | (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)) { | |
1539 | /* Stop SDCLK */ | |
1540 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1541 | clk &= ~SDHCI_CLOCK_CARD_EN; | |
1542 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1543 | ||
1544 | /* Check whether DAT[3:0] is 0000 */ | |
1545 | present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); | |
1546 | if (!((present_state & SDHCI_DATA_LVL_MASK) >> | |
1547 | SDHCI_DATA_LVL_SHIFT)) { | |
1548 | /* | |
1549 | * Enable 1.8V Signal Enable in the Host Control2 | |
1550 | * register | |
1551 | */ | |
1552 | ctrl |= SDHCI_CTRL_VDD_180; | |
1553 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1554 | ||
1555 | /* Wait for 5ms */ | |
1556 | usleep_range(5000, 5500); | |
1557 | ||
1558 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1559 | if (ctrl & SDHCI_CTRL_VDD_180) { | |
1560 | /* Provide SDCLK again and wait for 1ms*/ | |
1561 | clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
1562 | clk |= SDHCI_CLOCK_CARD_EN; | |
1563 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
1564 | usleep_range(1000, 1500); | |
1565 | ||
1566 | /* | |
1567 | * If DAT[3:0] level is 1111b, then the card | |
1568 | * was successfully switched to 1.8V signaling. | |
1569 | */ | |
1570 | present_state = sdhci_readl(host, | |
1571 | SDHCI_PRESENT_STATE); | |
1572 | if ((present_state & SDHCI_DATA_LVL_MASK) == | |
1573 | SDHCI_DATA_LVL_MASK) | |
1574 | return 0; | |
1575 | } | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * If we are here, that means the switch to 1.8V signaling | |
1580 | * failed. We power cycle the card, and retry initialization | |
1581 | * sequence by setting S18R to 0. | |
1582 | */ | |
1583 | pwr = sdhci_readb(host, SDHCI_POWER_CONTROL); | |
1584 | pwr &= ~SDHCI_POWER_ON; | |
1585 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); | |
1586 | ||
1587 | /* Wait for 1ms as per the spec */ | |
1588 | usleep_range(1000, 1500); | |
1589 | pwr |= SDHCI_POWER_ON; | |
1590 | sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); | |
1591 | ||
1592 | printk(KERN_INFO DRIVER_NAME ": Switching to 1.8V signalling " | |
1593 | "voltage failed, retrying with S18R set to 0\n"); | |
1594 | return -EAGAIN; | |
1595 | } else | |
1596 | /* No signal voltage switch required */ | |
1597 | return 0; | |
1598 | } | |
1599 | ||
b513ea25 AN |
1600 | static int sdhci_execute_tuning(struct mmc_host *mmc) |
1601 | { | |
1602 | struct sdhci_host *host; | |
1603 | u16 ctrl; | |
1604 | u32 ier; | |
1605 | int tuning_loop_counter = MAX_TUNING_LOOP; | |
1606 | unsigned long timeout; | |
1607 | int err = 0; | |
1608 | ||
1609 | host = mmc_priv(mmc); | |
1610 | ||
1611 | disable_irq(host->irq); | |
1612 | spin_lock(&host->lock); | |
1613 | ||
1614 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1615 | ||
1616 | /* | |
1617 | * Host Controller needs tuning only in case of SDR104 mode | |
1618 | * and for SDR50 mode when Use Tuning for SDR50 is set in | |
1619 | * Capabilities register. | |
1620 | */ | |
1621 | if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) || | |
1622 | (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) && | |
1623 | (host->flags & SDHCI_SDR50_NEEDS_TUNING))) | |
1624 | ctrl |= SDHCI_CTRL_EXEC_TUNING; | |
1625 | else { | |
1626 | spin_unlock(&host->lock); | |
1627 | enable_irq(host->irq); | |
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1632 | ||
1633 | /* | |
1634 | * As per the Host Controller spec v3.00, tuning command | |
1635 | * generates Buffer Read Ready interrupt, so enable that. | |
1636 | * | |
1637 | * Note: The spec clearly says that when tuning sequence | |
1638 | * is being performed, the controller does not generate | |
1639 | * interrupts other than Buffer Read Ready interrupt. But | |
1640 | * to make sure we don't hit a controller bug, we _only_ | |
1641 | * enable Buffer Read Ready interrupt here. | |
1642 | */ | |
1643 | ier = sdhci_readl(host, SDHCI_INT_ENABLE); | |
1644 | sdhci_clear_set_irqs(host, ier, SDHCI_INT_DATA_AVAIL); | |
1645 | ||
1646 | /* | |
1647 | * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number | |
1648 | * of loops reaches 40 times or a timeout of 150ms occurs. | |
1649 | */ | |
1650 | timeout = 150; | |
1651 | do { | |
1652 | struct mmc_command cmd = {0}; | |
1653 | struct mmc_request mrq = {0}; | |
1654 | ||
1655 | if (!tuning_loop_counter && !timeout) | |
1656 | break; | |
1657 | ||
1658 | cmd.opcode = MMC_SEND_TUNING_BLOCK; | |
1659 | cmd.arg = 0; | |
1660 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |
1661 | cmd.retries = 0; | |
1662 | cmd.data = NULL; | |
1663 | cmd.error = 0; | |
1664 | ||
1665 | mrq.cmd = &cmd; | |
1666 | host->mrq = &mrq; | |
1667 | ||
1668 | /* | |
1669 | * In response to CMD19, the card sends 64 bytes of tuning | |
1670 | * block to the Host Controller. So we set the block size | |
1671 | * to 64 here. | |
1672 | */ | |
1673 | sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), SDHCI_BLOCK_SIZE); | |
1674 | ||
1675 | /* | |
1676 | * The tuning block is sent by the card to the host controller. | |
1677 | * So we set the TRNS_READ bit in the Transfer Mode register. | |
1678 | * This also takes care of setting DMA Enable and Multi Block | |
1679 | * Select in the same register to 0. | |
1680 | */ | |
1681 | sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); | |
1682 | ||
1683 | sdhci_send_command(host, &cmd); | |
1684 | ||
1685 | host->cmd = NULL; | |
1686 | host->mrq = NULL; | |
1687 | ||
1688 | spin_unlock(&host->lock); | |
1689 | enable_irq(host->irq); | |
1690 | ||
1691 | /* Wait for Buffer Read Ready interrupt */ | |
1692 | wait_event_interruptible_timeout(host->buf_ready_int, | |
1693 | (host->tuning_done == 1), | |
1694 | msecs_to_jiffies(50)); | |
1695 | disable_irq(host->irq); | |
1696 | spin_lock(&host->lock); | |
1697 | ||
1698 | if (!host->tuning_done) { | |
1699 | printk(KERN_INFO DRIVER_NAME ": Timeout waiting for " | |
1700 | "Buffer Read Ready interrupt during tuning " | |
1701 | "procedure, falling back to fixed sampling " | |
1702 | "clock\n"); | |
1703 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1704 | ctrl &= ~SDHCI_CTRL_TUNED_CLK; | |
1705 | ctrl &= ~SDHCI_CTRL_EXEC_TUNING; | |
1706 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1707 | ||
1708 | err = -EIO; | |
1709 | goto out; | |
1710 | } | |
1711 | ||
1712 | host->tuning_done = 0; | |
1713 | ||
1714 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1715 | tuning_loop_counter--; | |
1716 | timeout--; | |
1717 | mdelay(1); | |
1718 | } while (ctrl & SDHCI_CTRL_EXEC_TUNING); | |
1719 | ||
1720 | /* | |
1721 | * The Host Driver has exhausted the maximum number of loops allowed, | |
1722 | * so use fixed sampling frequency. | |
1723 | */ | |
1724 | if (!tuning_loop_counter || !timeout) { | |
1725 | ctrl &= ~SDHCI_CTRL_TUNED_CLK; | |
1726 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1727 | } else { | |
1728 | if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { | |
1729 | printk(KERN_INFO DRIVER_NAME ": Tuning procedure" | |
1730 | " failed, falling back to fixed sampling" | |
1731 | " clock\n"); | |
1732 | err = -EIO; | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | out: | |
cf2b5eea AN |
1737 | /* |
1738 | * If this is the very first time we are here, we start the retuning | |
1739 | * timer. Since only during the first time, SDHCI_NEEDS_RETUNING | |
1740 | * flag won't be set, we check this condition before actually starting | |
1741 | * the timer. | |
1742 | */ | |
1743 | if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count && | |
1744 | (host->tuning_mode == SDHCI_TUNING_MODE_1)) { | |
1745 | mod_timer(&host->tuning_timer, jiffies + | |
1746 | host->tuning_count * HZ); | |
1747 | /* Tuning mode 1 limits the maximum data length to 4MB */ | |
1748 | mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size; | |
1749 | } else { | |
1750 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
1751 | /* Reload the new initial value for timer */ | |
1752 | if (host->tuning_mode == SDHCI_TUNING_MODE_1) | |
1753 | mod_timer(&host->tuning_timer, jiffies + | |
1754 | host->tuning_count * HZ); | |
1755 | } | |
1756 | ||
1757 | /* | |
1758 | * In case tuning fails, host controllers which support re-tuning can | |
1759 | * try tuning again at a later time, when the re-tuning timer expires. | |
1760 | * So for these controllers, we return 0. Since there might be other | |
1761 | * controllers who do not have this capability, we return error for | |
1762 | * them. | |
1763 | */ | |
1764 | if (err && host->tuning_count && | |
1765 | host->tuning_mode == SDHCI_TUNING_MODE_1) | |
1766 | err = 0; | |
1767 | ||
b513ea25 AN |
1768 | sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier); |
1769 | spin_unlock(&host->lock); | |
1770 | enable_irq(host->irq); | |
1771 | ||
1772 | return err; | |
1773 | } | |
1774 | ||
4d55c5a1 AN |
1775 | static void sdhci_enable_preset_value(struct mmc_host *mmc, bool enable) |
1776 | { | |
1777 | struct sdhci_host *host; | |
1778 | u16 ctrl; | |
1779 | unsigned long flags; | |
1780 | ||
1781 | host = mmc_priv(mmc); | |
1782 | ||
1783 | /* Host Controller v3.00 defines preset value registers */ | |
1784 | if (host->version < SDHCI_SPEC_300) | |
1785 | return; | |
1786 | ||
1787 | spin_lock_irqsave(&host->lock, flags); | |
1788 | ||
1789 | ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
1790 | ||
1791 | /* | |
1792 | * We only enable or disable Preset Value if they are not already | |
1793 | * enabled or disabled respectively. Otherwise, we bail out. | |
1794 | */ | |
1795 | if (enable && !(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { | |
1796 | ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE; | |
1797 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1798 | } else if (!enable && (ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { | |
1799 | ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; | |
1800 | sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); | |
1801 | } | |
1802 | ||
1803 | spin_unlock_irqrestore(&host->lock, flags); | |
1804 | } | |
1805 | ||
ab7aefd0 | 1806 | static const struct mmc_host_ops sdhci_ops = { |
d129bceb PO |
1807 | .request = sdhci_request, |
1808 | .set_ios = sdhci_set_ios, | |
1809 | .get_ro = sdhci_get_ro, | |
f75979b7 | 1810 | .enable_sdio_irq = sdhci_enable_sdio_irq, |
f2119df6 | 1811 | .start_signal_voltage_switch = sdhci_start_signal_voltage_switch, |
b513ea25 | 1812 | .execute_tuning = sdhci_execute_tuning, |
4d55c5a1 | 1813 | .enable_preset_value = sdhci_enable_preset_value, |
d129bceb PO |
1814 | }; |
1815 | ||
1816 | /*****************************************************************************\ | |
1817 | * * | |
1818 | * Tasklets * | |
1819 | * * | |
1820 | \*****************************************************************************/ | |
1821 | ||
1822 | static void sdhci_tasklet_card(unsigned long param) | |
1823 | { | |
1824 | struct sdhci_host *host; | |
1825 | unsigned long flags; | |
1826 | ||
1827 | host = (struct sdhci_host*)param; | |
1828 | ||
1829 | spin_lock_irqsave(&host->lock, flags); | |
1830 | ||
4e4141a5 | 1831 | if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { |
d129bceb PO |
1832 | if (host->mrq) { |
1833 | printk(KERN_ERR "%s: Card removed during transfer!\n", | |
1834 | mmc_hostname(host->mmc)); | |
1835 | printk(KERN_ERR "%s: Resetting controller.\n", | |
1836 | mmc_hostname(host->mmc)); | |
1837 | ||
1838 | sdhci_reset(host, SDHCI_RESET_CMD); | |
1839 | sdhci_reset(host, SDHCI_RESET_DATA); | |
1840 | ||
17b0429d | 1841 | host->mrq->cmd->error = -ENOMEDIUM; |
d129bceb PO |
1842 | tasklet_schedule(&host->finish_tasklet); |
1843 | } | |
1844 | } | |
1845 | ||
1846 | spin_unlock_irqrestore(&host->lock, flags); | |
1847 | ||
04cf585d | 1848 | mmc_detect_change(host->mmc, msecs_to_jiffies(200)); |
d129bceb PO |
1849 | } |
1850 | ||
1851 | static void sdhci_tasklet_finish(unsigned long param) | |
1852 | { | |
1853 | struct sdhci_host *host; | |
1854 | unsigned long flags; | |
1855 | struct mmc_request *mrq; | |
1856 | ||
1857 | host = (struct sdhci_host*)param; | |
1858 | ||
0c9c99a7 CB |
1859 | /* |
1860 | * If this tasklet gets rescheduled while running, it will | |
1861 | * be run again afterwards but without any active request. | |
1862 | */ | |
1863 | if (!host->mrq) | |
1864 | return; | |
1865 | ||
d129bceb PO |
1866 | spin_lock_irqsave(&host->lock, flags); |
1867 | ||
1868 | del_timer(&host->timer); | |
1869 | ||
cf2b5eea AN |
1870 | if (host->version >= SDHCI_SPEC_300) |
1871 | del_timer(&host->tuning_timer); | |
1872 | ||
d129bceb PO |
1873 | mrq = host->mrq; |
1874 | ||
d129bceb PO |
1875 | /* |
1876 | * The controller needs a reset of internal state machines | |
1877 | * upon error conditions. | |
1878 | */ | |
1e72859e | 1879 | if (!(host->flags & SDHCI_DEVICE_DEAD) && |
b7b4d342 | 1880 | ((mrq->cmd && mrq->cmd->error) || |
1e72859e PO |
1881 | (mrq->data && (mrq->data->error || |
1882 | (mrq->data->stop && mrq->data->stop->error))) || | |
1883 | (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { | |
645289dc PO |
1884 | |
1885 | /* Some controllers need this kick or reset won't work here */ | |
b8c86fc5 | 1886 | if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) { |
645289dc PO |
1887 | unsigned int clock; |
1888 | ||
1889 | /* This is to force an update */ | |
1890 | clock = host->clock; | |
1891 | host->clock = 0; | |
1892 | sdhci_set_clock(host, clock); | |
1893 | } | |
1894 | ||
1895 | /* Spec says we should do both at the same time, but Ricoh | |
1896 | controllers do not like that. */ | |
d129bceb PO |
1897 | sdhci_reset(host, SDHCI_RESET_CMD); |
1898 | sdhci_reset(host, SDHCI_RESET_DATA); | |
1899 | } | |
1900 | ||
1901 | host->mrq = NULL; | |
1902 | host->cmd = NULL; | |
1903 | host->data = NULL; | |
1904 | ||
f9134319 | 1905 | #ifndef SDHCI_USE_LEDS_CLASS |
d129bceb | 1906 | sdhci_deactivate_led(host); |
2f730fec | 1907 | #endif |
d129bceb | 1908 | |
5f25a66f | 1909 | mmiowb(); |
d129bceb PO |
1910 | spin_unlock_irqrestore(&host->lock, flags); |
1911 | ||
1912 | mmc_request_done(host->mmc, mrq); | |
1913 | } | |
1914 | ||
1915 | static void sdhci_timeout_timer(unsigned long data) | |
1916 | { | |
1917 | struct sdhci_host *host; | |
1918 | unsigned long flags; | |
1919 | ||
1920 | host = (struct sdhci_host*)data; | |
1921 | ||
1922 | spin_lock_irqsave(&host->lock, flags); | |
1923 | ||
1924 | if (host->mrq) { | |
acf1da45 PO |
1925 | printk(KERN_ERR "%s: Timeout waiting for hardware " |
1926 | "interrupt.\n", mmc_hostname(host->mmc)); | |
d129bceb PO |
1927 | sdhci_dumpregs(host); |
1928 | ||
1929 | if (host->data) { | |
17b0429d | 1930 | host->data->error = -ETIMEDOUT; |
d129bceb PO |
1931 | sdhci_finish_data(host); |
1932 | } else { | |
1933 | if (host->cmd) | |
17b0429d | 1934 | host->cmd->error = -ETIMEDOUT; |
d129bceb | 1935 | else |
17b0429d | 1936 | host->mrq->cmd->error = -ETIMEDOUT; |
d129bceb PO |
1937 | |
1938 | tasklet_schedule(&host->finish_tasklet); | |
1939 | } | |
1940 | } | |
1941 | ||
5f25a66f | 1942 | mmiowb(); |
d129bceb PO |
1943 | spin_unlock_irqrestore(&host->lock, flags); |
1944 | } | |
1945 | ||
cf2b5eea AN |
1946 | static void sdhci_tuning_timer(unsigned long data) |
1947 | { | |
1948 | struct sdhci_host *host; | |
1949 | unsigned long flags; | |
1950 | ||
1951 | host = (struct sdhci_host *)data; | |
1952 | ||
1953 | spin_lock_irqsave(&host->lock, flags); | |
1954 | ||
1955 | host->flags |= SDHCI_NEEDS_RETUNING; | |
1956 | ||
1957 | spin_unlock_irqrestore(&host->lock, flags); | |
1958 | } | |
1959 | ||
d129bceb PO |
1960 | /*****************************************************************************\ |
1961 | * * | |
1962 | * Interrupt handling * | |
1963 | * * | |
1964 | \*****************************************************************************/ | |
1965 | ||
1966 | static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) | |
1967 | { | |
1968 | BUG_ON(intmask == 0); | |
1969 | ||
1970 | if (!host->cmd) { | |
b67ac3f3 PO |
1971 | printk(KERN_ERR "%s: Got command interrupt 0x%08x even " |
1972 | "though no command operation was in progress.\n", | |
1973 | mmc_hostname(host->mmc), (unsigned)intmask); | |
d129bceb PO |
1974 | sdhci_dumpregs(host); |
1975 | return; | |
1976 | } | |
1977 | ||
43b58b36 | 1978 | if (intmask & SDHCI_INT_TIMEOUT) |
17b0429d PO |
1979 | host->cmd->error = -ETIMEDOUT; |
1980 | else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT | | |
1981 | SDHCI_INT_INDEX)) | |
1982 | host->cmd->error = -EILSEQ; | |
43b58b36 | 1983 | |
e809517f | 1984 | if (host->cmd->error) { |
d129bceb | 1985 | tasklet_schedule(&host->finish_tasklet); |
e809517f PO |
1986 | return; |
1987 | } | |
1988 | ||
1989 | /* | |
1990 | * The host can send and interrupt when the busy state has | |
1991 | * ended, allowing us to wait without wasting CPU cycles. | |
1992 | * Unfortunately this is overloaded on the "data complete" | |
1993 | * interrupt, so we need to take some care when handling | |
1994 | * it. | |
1995 | * | |
1996 | * Note: The 1.0 specification is a bit ambiguous about this | |
1997 | * feature so there might be some problems with older | |
1998 | * controllers. | |
1999 | */ | |
2000 | if (host->cmd->flags & MMC_RSP_BUSY) { | |
2001 | if (host->cmd->data) | |
2002 | DBG("Cannot wait for busy signal when also " | |
2003 | "doing a data transfer"); | |
f945405c | 2004 | else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ)) |
e809517f | 2005 | return; |
f945405c BD |
2006 | |
2007 | /* The controller does not support the end-of-busy IRQ, | |
2008 | * fall through and take the SDHCI_INT_RESPONSE */ | |
e809517f PO |
2009 | } |
2010 | ||
2011 | if (intmask & SDHCI_INT_RESPONSE) | |
43b58b36 | 2012 | sdhci_finish_command(host); |
d129bceb PO |
2013 | } |
2014 | ||
0957c333 | 2015 | #ifdef CONFIG_MMC_DEBUG |
6882a8c0 BD |
2016 | static void sdhci_show_adma_error(struct sdhci_host *host) |
2017 | { | |
2018 | const char *name = mmc_hostname(host->mmc); | |
2019 | u8 *desc = host->adma_desc; | |
2020 | __le32 *dma; | |
2021 | __le16 *len; | |
2022 | u8 attr; | |
2023 | ||
2024 | sdhci_dumpregs(host); | |
2025 | ||
2026 | while (true) { | |
2027 | dma = (__le32 *)(desc + 4); | |
2028 | len = (__le16 *)(desc + 2); | |
2029 | attr = *desc; | |
2030 | ||
2031 | DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", | |
2032 | name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr); | |
2033 | ||
2034 | desc += 8; | |
2035 | ||
2036 | if (attr & 2) | |
2037 | break; | |
2038 | } | |
2039 | } | |
2040 | #else | |
2041 | static void sdhci_show_adma_error(struct sdhci_host *host) { } | |
2042 | #endif | |
2043 | ||
d129bceb PO |
2044 | static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) |
2045 | { | |
2046 | BUG_ON(intmask == 0); | |
2047 | ||
b513ea25 AN |
2048 | /* CMD19 generates _only_ Buffer Read Ready interrupt */ |
2049 | if (intmask & SDHCI_INT_DATA_AVAIL) { | |
2050 | if (SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) == | |
2051 | MMC_SEND_TUNING_BLOCK) { | |
2052 | host->tuning_done = 1; | |
2053 | wake_up(&host->buf_ready_int); | |
2054 | return; | |
2055 | } | |
2056 | } | |
2057 | ||
d129bceb PO |
2058 | if (!host->data) { |
2059 | /* | |
e809517f PO |
2060 | * The "data complete" interrupt is also used to |
2061 | * indicate that a busy state has ended. See comment | |
2062 | * above in sdhci_cmd_irq(). | |
d129bceb | 2063 | */ |
e809517f PO |
2064 | if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) { |
2065 | if (intmask & SDHCI_INT_DATA_END) { | |
2066 | sdhci_finish_command(host); | |
2067 | return; | |
2068 | } | |
2069 | } | |
d129bceb | 2070 | |
b67ac3f3 PO |
2071 | printk(KERN_ERR "%s: Got data interrupt 0x%08x even " |
2072 | "though no data operation was in progress.\n", | |
2073 | mmc_hostname(host->mmc), (unsigned)intmask); | |
d129bceb PO |
2074 | sdhci_dumpregs(host); |
2075 | ||
2076 | return; | |
2077 | } | |
2078 | ||
2079 | if (intmask & SDHCI_INT_DATA_TIMEOUT) | |
17b0429d | 2080 | host->data->error = -ETIMEDOUT; |
22113efd AL |
2081 | else if (intmask & SDHCI_INT_DATA_END_BIT) |
2082 | host->data->error = -EILSEQ; | |
2083 | else if ((intmask & SDHCI_INT_DATA_CRC) && | |
2084 | SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) | |
2085 | != MMC_BUS_TEST_R) | |
17b0429d | 2086 | host->data->error = -EILSEQ; |
6882a8c0 BD |
2087 | else if (intmask & SDHCI_INT_ADMA_ERROR) { |
2088 | printk(KERN_ERR "%s: ADMA error\n", mmc_hostname(host->mmc)); | |
2089 | sdhci_show_adma_error(host); | |
2134a922 | 2090 | host->data->error = -EIO; |
6882a8c0 | 2091 | } |
d129bceb | 2092 | |
17b0429d | 2093 | if (host->data->error) |
d129bceb PO |
2094 | sdhci_finish_data(host); |
2095 | else { | |
a406f5a3 | 2096 | if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) |
d129bceb PO |
2097 | sdhci_transfer_pio(host); |
2098 | ||
6ba736a1 PO |
2099 | /* |
2100 | * We currently don't do anything fancy with DMA | |
2101 | * boundaries, but as we can't disable the feature | |
2102 | * we need to at least restart the transfer. | |
f6a03cbf MV |
2103 | * |
2104 | * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS) | |
2105 | * should return a valid address to continue from, but as | |
2106 | * some controllers are faulty, don't trust them. | |
6ba736a1 | 2107 | */ |
f6a03cbf MV |
2108 | if (intmask & SDHCI_INT_DMA_END) { |
2109 | u32 dmastart, dmanow; | |
2110 | dmastart = sg_dma_address(host->data->sg); | |
2111 | dmanow = dmastart + host->data->bytes_xfered; | |
2112 | /* | |
2113 | * Force update to the next DMA block boundary. | |
2114 | */ | |
2115 | dmanow = (dmanow & | |
2116 | ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) + | |
2117 | SDHCI_DEFAULT_BOUNDARY_SIZE; | |
2118 | host->data->bytes_xfered = dmanow - dmastart; | |
2119 | DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes," | |
2120 | " next 0x%08x\n", | |
2121 | mmc_hostname(host->mmc), dmastart, | |
2122 | host->data->bytes_xfered, dmanow); | |
2123 | sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS); | |
2124 | } | |
6ba736a1 | 2125 | |
e538fbe8 PO |
2126 | if (intmask & SDHCI_INT_DATA_END) { |
2127 | if (host->cmd) { | |
2128 | /* | |
2129 | * Data managed to finish before the | |
2130 | * command completed. Make sure we do | |
2131 | * things in the proper order. | |
2132 | */ | |
2133 | host->data_early = 1; | |
2134 | } else { | |
2135 | sdhci_finish_data(host); | |
2136 | } | |
2137 | } | |
d129bceb PO |
2138 | } |
2139 | } | |
2140 | ||
7d12e780 | 2141 | static irqreturn_t sdhci_irq(int irq, void *dev_id) |
d129bceb PO |
2142 | { |
2143 | irqreturn_t result; | |
2144 | struct sdhci_host* host = dev_id; | |
2145 | u32 intmask; | |
f75979b7 | 2146 | int cardint = 0; |
d129bceb PO |
2147 | |
2148 | spin_lock(&host->lock); | |
2149 | ||
4e4141a5 | 2150 | intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
d129bceb | 2151 | |
62df67a5 | 2152 | if (!intmask || intmask == 0xffffffff) { |
d129bceb PO |
2153 | result = IRQ_NONE; |
2154 | goto out; | |
2155 | } | |
2156 | ||
b69c9058 PO |
2157 | DBG("*** %s got interrupt: 0x%08x\n", |
2158 | mmc_hostname(host->mmc), intmask); | |
d129bceb | 2159 | |
3192a28f | 2160 | if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { |
d25928d1 SG |
2161 | u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
2162 | SDHCI_CARD_PRESENT; | |
2163 | ||
2164 | /* | |
2165 | * There is a observation on i.mx esdhc. INSERT bit will be | |
2166 | * immediately set again when it gets cleared, if a card is | |
2167 | * inserted. We have to mask the irq to prevent interrupt | |
2168 | * storm which will freeze the system. And the REMOVE gets | |
2169 | * the same situation. | |
2170 | * | |
2171 | * More testing are needed here to ensure it works for other | |
2172 | * platforms though. | |
2173 | */ | |
2174 | sdhci_mask_irqs(host, present ? SDHCI_INT_CARD_INSERT : | |
2175 | SDHCI_INT_CARD_REMOVE); | |
2176 | sdhci_unmask_irqs(host, present ? SDHCI_INT_CARD_REMOVE : | |
2177 | SDHCI_INT_CARD_INSERT); | |
2178 | ||
4e4141a5 | 2179 | sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT | |
d25928d1 SG |
2180 | SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS); |
2181 | intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); | |
d129bceb | 2182 | tasklet_schedule(&host->card_tasklet); |
3192a28f | 2183 | } |
d129bceb | 2184 | |
3192a28f | 2185 | if (intmask & SDHCI_INT_CMD_MASK) { |
4e4141a5 AV |
2186 | sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK, |
2187 | SDHCI_INT_STATUS); | |
3192a28f | 2188 | sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK); |
d129bceb PO |
2189 | } |
2190 | ||
2191 | if (intmask & SDHCI_INT_DATA_MASK) { | |
4e4141a5 AV |
2192 | sdhci_writel(host, intmask & SDHCI_INT_DATA_MASK, |
2193 | SDHCI_INT_STATUS); | |
3192a28f | 2194 | sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK); |
d129bceb PO |
2195 | } |
2196 | ||
2197 | intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK); | |
2198 | ||
964f9ce2 PO |
2199 | intmask &= ~SDHCI_INT_ERROR; |
2200 | ||
d129bceb | 2201 | if (intmask & SDHCI_INT_BUS_POWER) { |
3192a28f | 2202 | printk(KERN_ERR "%s: Card is consuming too much power!\n", |
d129bceb | 2203 | mmc_hostname(host->mmc)); |
4e4141a5 | 2204 | sdhci_writel(host, SDHCI_INT_BUS_POWER, SDHCI_INT_STATUS); |
d129bceb PO |
2205 | } |
2206 | ||
9d26a5d3 | 2207 | intmask &= ~SDHCI_INT_BUS_POWER; |
3192a28f | 2208 | |
f75979b7 PO |
2209 | if (intmask & SDHCI_INT_CARD_INT) |
2210 | cardint = 1; | |
2211 | ||
2212 | intmask &= ~SDHCI_INT_CARD_INT; | |
2213 | ||
3192a28f | 2214 | if (intmask) { |
acf1da45 | 2215 | printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n", |
3192a28f | 2216 | mmc_hostname(host->mmc), intmask); |
d129bceb PO |
2217 | sdhci_dumpregs(host); |
2218 | ||
4e4141a5 | 2219 | sdhci_writel(host, intmask, SDHCI_INT_STATUS); |
3192a28f | 2220 | } |
d129bceb PO |
2221 | |
2222 | result = IRQ_HANDLED; | |
2223 | ||
5f25a66f | 2224 | mmiowb(); |
d129bceb PO |
2225 | out: |
2226 | spin_unlock(&host->lock); | |
2227 | ||
f75979b7 PO |
2228 | /* |
2229 | * We have to delay this as it calls back into the driver. | |
2230 | */ | |
2231 | if (cardint) | |
2232 | mmc_signal_sdio_irq(host->mmc); | |
2233 | ||
d129bceb PO |
2234 | return result; |
2235 | } | |
2236 | ||
2237 | /*****************************************************************************\ | |
2238 | * * | |
2239 | * Suspend/resume * | |
2240 | * * | |
2241 | \*****************************************************************************/ | |
2242 | ||
2243 | #ifdef CONFIG_PM | |
2244 | ||
b8c86fc5 | 2245 | int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state) |
d129bceb | 2246 | { |
b8c86fc5 | 2247 | int ret; |
a715dfc7 | 2248 | |
7260cf5e AV |
2249 | sdhci_disable_card_detection(host); |
2250 | ||
cf2b5eea AN |
2251 | /* Disable tuning since we are suspending */ |
2252 | if (host->version >= SDHCI_SPEC_300 && host->tuning_count && | |
2253 | host->tuning_mode == SDHCI_TUNING_MODE_1) { | |
2254 | host->flags &= ~SDHCI_NEEDS_RETUNING; | |
2255 | mod_timer(&host->tuning_timer, jiffies + | |
2256 | host->tuning_count * HZ); | |
2257 | } | |
2258 | ||
1a13f8fa | 2259 | ret = mmc_suspend_host(host->mmc); |
b8c86fc5 PO |
2260 | if (ret) |
2261 | return ret; | |
a715dfc7 | 2262 | |
b8c86fc5 | 2263 | free_irq(host->irq, host); |
d129bceb | 2264 | |
9bea3c85 MS |
2265 | if (host->vmmc) |
2266 | ret = regulator_disable(host->vmmc); | |
2267 | ||
2268 | return ret; | |
d129bceb PO |
2269 | } |
2270 | ||
b8c86fc5 | 2271 | EXPORT_SYMBOL_GPL(sdhci_suspend_host); |
d129bceb | 2272 | |
b8c86fc5 PO |
2273 | int sdhci_resume_host(struct sdhci_host *host) |
2274 | { | |
2275 | int ret; | |
d129bceb | 2276 | |
9bea3c85 MS |
2277 | if (host->vmmc) { |
2278 | int ret = regulator_enable(host->vmmc); | |
2279 | if (ret) | |
2280 | return ret; | |
2281 | } | |
2282 | ||
2283 | ||
a13abc7b | 2284 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
b8c86fc5 PO |
2285 | if (host->ops->enable_dma) |
2286 | host->ops->enable_dma(host); | |
2287 | } | |
d129bceb | 2288 | |
b8c86fc5 PO |
2289 | ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, |
2290 | mmc_hostname(host->mmc), host); | |
df1c4b7b PO |
2291 | if (ret) |
2292 | return ret; | |
d129bceb | 2293 | |
2f4cbb3d | 2294 | sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER)); |
b8c86fc5 PO |
2295 | mmiowb(); |
2296 | ||
2297 | ret = mmc_resume_host(host->mmc); | |
7260cf5e AV |
2298 | sdhci_enable_card_detection(host); |
2299 | ||
cf2b5eea AN |
2300 | /* Set the re-tuning expiration flag */ |
2301 | if ((host->version >= SDHCI_SPEC_300) && host->tuning_count && | |
2302 | (host->tuning_mode == SDHCI_TUNING_MODE_1)) | |
2303 | host->flags |= SDHCI_NEEDS_RETUNING; | |
2304 | ||
2f4cbb3d | 2305 | return ret; |
d129bceb PO |
2306 | } |
2307 | ||
b8c86fc5 | 2308 | EXPORT_SYMBOL_GPL(sdhci_resume_host); |
d129bceb | 2309 | |
5f619704 DD |
2310 | void sdhci_enable_irq_wakeups(struct sdhci_host *host) |
2311 | { | |
2312 | u8 val; | |
2313 | val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); | |
2314 | val |= SDHCI_WAKE_ON_INT; | |
2315 | sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); | |
2316 | } | |
2317 | ||
2318 | EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups); | |
2319 | ||
d129bceb PO |
2320 | #endif /* CONFIG_PM */ |
2321 | ||
2322 | /*****************************************************************************\ | |
2323 | * * | |
b8c86fc5 | 2324 | * Device allocation/registration * |
d129bceb PO |
2325 | * * |
2326 | \*****************************************************************************/ | |
2327 | ||
b8c86fc5 PO |
2328 | struct sdhci_host *sdhci_alloc_host(struct device *dev, |
2329 | size_t priv_size) | |
d129bceb | 2330 | { |
d129bceb PO |
2331 | struct mmc_host *mmc; |
2332 | struct sdhci_host *host; | |
2333 | ||
b8c86fc5 | 2334 | WARN_ON(dev == NULL); |
d129bceb | 2335 | |
b8c86fc5 | 2336 | mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev); |
d129bceb | 2337 | if (!mmc) |
b8c86fc5 | 2338 | return ERR_PTR(-ENOMEM); |
d129bceb PO |
2339 | |
2340 | host = mmc_priv(mmc); | |
2341 | host->mmc = mmc; | |
2342 | ||
b8c86fc5 PO |
2343 | return host; |
2344 | } | |
8a4da143 | 2345 | |
b8c86fc5 | 2346 | EXPORT_SYMBOL_GPL(sdhci_alloc_host); |
d129bceb | 2347 | |
b8c86fc5 PO |
2348 | int sdhci_add_host(struct sdhci_host *host) |
2349 | { | |
2350 | struct mmc_host *mmc; | |
f2119df6 AN |
2351 | u32 caps[2]; |
2352 | u32 max_current_caps; | |
2353 | unsigned int ocr_avail; | |
b8c86fc5 | 2354 | int ret; |
d129bceb | 2355 | |
b8c86fc5 PO |
2356 | WARN_ON(host == NULL); |
2357 | if (host == NULL) | |
2358 | return -EINVAL; | |
d129bceb | 2359 | |
b8c86fc5 | 2360 | mmc = host->mmc; |
d129bceb | 2361 | |
b8c86fc5 PO |
2362 | if (debug_quirks) |
2363 | host->quirks = debug_quirks; | |
d129bceb | 2364 | |
d96649ed PO |
2365 | sdhci_reset(host, SDHCI_RESET_ALL); |
2366 | ||
4e4141a5 | 2367 | host->version = sdhci_readw(host, SDHCI_HOST_VERSION); |
2134a922 PO |
2368 | host->version = (host->version & SDHCI_SPEC_VER_MASK) |
2369 | >> SDHCI_SPEC_VER_SHIFT; | |
85105c53 | 2370 | if (host->version > SDHCI_SPEC_300) { |
4a965505 | 2371 | printk(KERN_ERR "%s: Unknown controller version (%d). " |
b69c9058 | 2372 | "You may experience problems.\n", mmc_hostname(mmc), |
2134a922 | 2373 | host->version); |
4a965505 PO |
2374 | } |
2375 | ||
f2119df6 | 2376 | caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps : |
ccc92c23 | 2377 | sdhci_readl(host, SDHCI_CAPABILITIES); |
d129bceb | 2378 | |
f2119df6 AN |
2379 | caps[1] = (host->version >= SDHCI_SPEC_300) ? |
2380 | sdhci_readl(host, SDHCI_CAPABILITIES_1) : 0; | |
2381 | ||
b8c86fc5 | 2382 | if (host->quirks & SDHCI_QUIRK_FORCE_DMA) |
a13abc7b | 2383 | host->flags |= SDHCI_USE_SDMA; |
f2119df6 | 2384 | else if (!(caps[0] & SDHCI_CAN_DO_SDMA)) |
a13abc7b | 2385 | DBG("Controller doesn't have SDMA capability\n"); |
67435274 | 2386 | else |
a13abc7b | 2387 | host->flags |= SDHCI_USE_SDMA; |
d129bceb | 2388 | |
b8c86fc5 | 2389 | if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) && |
a13abc7b | 2390 | (host->flags & SDHCI_USE_SDMA)) { |
cee687ce | 2391 | DBG("Disabling DMA as it is marked broken\n"); |
a13abc7b | 2392 | host->flags &= ~SDHCI_USE_SDMA; |
7c168e3d FT |
2393 | } |
2394 | ||
f2119df6 AN |
2395 | if ((host->version >= SDHCI_SPEC_200) && |
2396 | (caps[0] & SDHCI_CAN_DO_ADMA2)) | |
a13abc7b | 2397 | host->flags |= SDHCI_USE_ADMA; |
2134a922 PO |
2398 | |
2399 | if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) && | |
2400 | (host->flags & SDHCI_USE_ADMA)) { | |
2401 | DBG("Disabling ADMA as it is marked broken\n"); | |
2402 | host->flags &= ~SDHCI_USE_ADMA; | |
2403 | } | |
2404 | ||
a13abc7b | 2405 | if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
b8c86fc5 PO |
2406 | if (host->ops->enable_dma) { |
2407 | if (host->ops->enable_dma(host)) { | |
2408 | printk(KERN_WARNING "%s: No suitable DMA " | |
2409 | "available. Falling back to PIO.\n", | |
2410 | mmc_hostname(mmc)); | |
a13abc7b RR |
2411 | host->flags &= |
2412 | ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA); | |
b8c86fc5 | 2413 | } |
d129bceb PO |
2414 | } |
2415 | } | |
2416 | ||
2134a922 PO |
2417 | if (host->flags & SDHCI_USE_ADMA) { |
2418 | /* | |
2419 | * We need to allocate descriptors for all sg entries | |
2420 | * (128) and potentially one alignment transfer for | |
2421 | * each of those entries. | |
2422 | */ | |
2423 | host->adma_desc = kmalloc((128 * 2 + 1) * 4, GFP_KERNEL); | |
2424 | host->align_buffer = kmalloc(128 * 4, GFP_KERNEL); | |
2425 | if (!host->adma_desc || !host->align_buffer) { | |
2426 | kfree(host->adma_desc); | |
2427 | kfree(host->align_buffer); | |
2428 | printk(KERN_WARNING "%s: Unable to allocate ADMA " | |
2429 | "buffers. Falling back to standard DMA.\n", | |
2430 | mmc_hostname(mmc)); | |
2431 | host->flags &= ~SDHCI_USE_ADMA; | |
2432 | } | |
2433 | } | |
2434 | ||
7659150c PO |
2435 | /* |
2436 | * If we use DMA, then it's up to the caller to set the DMA | |
2437 | * mask, but PIO does not need the hw shim so we set a new | |
2438 | * mask here in that case. | |
2439 | */ | |
a13abc7b | 2440 | if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) { |
7659150c PO |
2441 | host->dma_mask = DMA_BIT_MASK(64); |
2442 | mmc_dev(host->mmc)->dma_mask = &host->dma_mask; | |
2443 | } | |
d129bceb | 2444 | |
c4687d5f | 2445 | if (host->version >= SDHCI_SPEC_300) |
f2119df6 | 2446 | host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK) |
c4687d5f ZG |
2447 | >> SDHCI_CLOCK_BASE_SHIFT; |
2448 | else | |
f2119df6 | 2449 | host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK) |
c4687d5f ZG |
2450 | >> SDHCI_CLOCK_BASE_SHIFT; |
2451 | ||
4240ff0a | 2452 | host->max_clk *= 1000000; |
f27f47ef AV |
2453 | if (host->max_clk == 0 || host->quirks & |
2454 | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) { | |
4240ff0a BD |
2455 | if (!host->ops->get_max_clock) { |
2456 | printk(KERN_ERR | |
2457 | "%s: Hardware doesn't specify base clock " | |
2458 | "frequency.\n", mmc_hostname(mmc)); | |
2459 | return -ENODEV; | |
2460 | } | |
2461 | host->max_clk = host->ops->get_max_clock(host); | |
8ef1a143 | 2462 | } |
d129bceb | 2463 | |
1c8cde92 | 2464 | host->timeout_clk = |
f2119df6 | 2465 | (caps[0] & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT; |
1c8cde92 | 2466 | if (host->timeout_clk == 0) { |
81b39802 AV |
2467 | if (host->ops->get_timeout_clock) { |
2468 | host->timeout_clk = host->ops->get_timeout_clock(host); | |
2469 | } else if (!(host->quirks & | |
2470 | SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) { | |
4240ff0a BD |
2471 | printk(KERN_ERR |
2472 | "%s: Hardware doesn't specify timeout clock " | |
2473 | "frequency.\n", mmc_hostname(mmc)); | |
2474 | return -ENODEV; | |
2475 | } | |
1c8cde92 | 2476 | } |
f2119df6 | 2477 | if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT) |
1c8cde92 | 2478 | host->timeout_clk *= 1000; |
d129bceb | 2479 | |
c3ed3877 AN |
2480 | /* |
2481 | * In case of Host Controller v3.00, find out whether clock | |
2482 | * multiplier is supported. | |
2483 | */ | |
2484 | host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >> | |
2485 | SDHCI_CLOCK_MUL_SHIFT; | |
2486 | ||
2487 | /* | |
2488 | * In case the value in Clock Multiplier is 0, then programmable | |
2489 | * clock mode is not supported, otherwise the actual clock | |
2490 | * multiplier is one more than the value of Clock Multiplier | |
2491 | * in the Capabilities Register. | |
2492 | */ | |
2493 | if (host->clk_mul) | |
2494 | host->clk_mul += 1; | |
2495 | ||
d129bceb PO |
2496 | /* |
2497 | * Set host parameters. | |
2498 | */ | |
2499 | mmc->ops = &sdhci_ops; | |
c3ed3877 | 2500 | mmc->f_max = host->max_clk; |
ce5f036b | 2501 | if (host->ops->get_min_clock) |
a9e58f25 | 2502 | mmc->f_min = host->ops->get_min_clock(host); |
c3ed3877 AN |
2503 | else if (host->version >= SDHCI_SPEC_300) { |
2504 | if (host->clk_mul) { | |
2505 | mmc->f_min = (host->max_clk * host->clk_mul) / 1024; | |
2506 | mmc->f_max = host->max_clk * host->clk_mul; | |
2507 | } else | |
2508 | mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300; | |
2509 | } else | |
0397526d | 2510 | mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200; |
15ec4461 | 2511 | |
e89d456f AW |
2512 | mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; |
2513 | ||
2514 | if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) | |
2515 | host->flags |= SDHCI_AUTO_CMD12; | |
5fe23c7f | 2516 | |
8edf6371 | 2517 | /* Auto-CMD23 stuff only works in ADMA or PIO. */ |
4f3d3e9b | 2518 | if ((host->version >= SDHCI_SPEC_300) && |
8edf6371 | 2519 | ((host->flags & SDHCI_USE_ADMA) || |
4f3d3e9b | 2520 | !(host->flags & SDHCI_USE_SDMA))) { |
8edf6371 AW |
2521 | host->flags |= SDHCI_AUTO_CMD23; |
2522 | DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc)); | |
2523 | } else { | |
2524 | DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc)); | |
2525 | } | |
2526 | ||
15ec4461 PR |
2527 | /* |
2528 | * A controller may support 8-bit width, but the board itself | |
2529 | * might not have the pins brought out. Boards that support | |
2530 | * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in | |
2531 | * their platform code before calling sdhci_add_host(), and we | |
2532 | * won't assume 8-bit width for hosts without that CAP. | |
2533 | */ | |
5fe23c7f | 2534 | if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) |
15ec4461 | 2535 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
d129bceb | 2536 | |
f2119df6 | 2537 | if (caps[0] & SDHCI_CAN_DO_HISPD) |
a29e7e18 | 2538 | mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; |
cd9277c0 | 2539 | |
176d1ed4 JC |
2540 | if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) && |
2541 | mmc_card_is_removable(mmc)) | |
68d1fb7e AV |
2542 | mmc->caps |= MMC_CAP_NEEDS_POLL; |
2543 | ||
f2119df6 AN |
2544 | /* UHS-I mode(s) supported by the host controller. */ |
2545 | if (host->version >= SDHCI_SPEC_300) | |
2546 | mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25; | |
2547 | ||
2548 | /* SDR104 supports also implies SDR50 support */ | |
2549 | if (caps[1] & SDHCI_SUPPORT_SDR104) | |
2550 | mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50; | |
2551 | else if (caps[1] & SDHCI_SUPPORT_SDR50) | |
2552 | mmc->caps |= MMC_CAP_UHS_SDR50; | |
2553 | ||
2554 | if (caps[1] & SDHCI_SUPPORT_DDR50) | |
2555 | mmc->caps |= MMC_CAP_UHS_DDR50; | |
2556 | ||
b513ea25 AN |
2557 | /* Does the host needs tuning for SDR50? */ |
2558 | if (caps[1] & SDHCI_USE_SDR50_TUNING) | |
2559 | host->flags |= SDHCI_SDR50_NEEDS_TUNING; | |
2560 | ||
d6d50a15 AN |
2561 | /* Driver Type(s) (A, C, D) supported by the host */ |
2562 | if (caps[1] & SDHCI_DRIVER_TYPE_A) | |
2563 | mmc->caps |= MMC_CAP_DRIVER_TYPE_A; | |
2564 | if (caps[1] & SDHCI_DRIVER_TYPE_C) | |
2565 | mmc->caps |= MMC_CAP_DRIVER_TYPE_C; | |
2566 | if (caps[1] & SDHCI_DRIVER_TYPE_D) | |
2567 | mmc->caps |= MMC_CAP_DRIVER_TYPE_D; | |
2568 | ||
cf2b5eea AN |
2569 | /* Initial value for re-tuning timer count */ |
2570 | host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> | |
2571 | SDHCI_RETUNING_TIMER_COUNT_SHIFT; | |
2572 | ||
2573 | /* | |
2574 | * In case Re-tuning Timer is not disabled, the actual value of | |
2575 | * re-tuning timer will be 2 ^ (n - 1). | |
2576 | */ | |
2577 | if (host->tuning_count) | |
2578 | host->tuning_count = 1 << (host->tuning_count - 1); | |
2579 | ||
2580 | /* Re-tuning mode supported by the Host Controller */ | |
2581 | host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >> | |
2582 | SDHCI_RETUNING_MODE_SHIFT; | |
2583 | ||
8f230f45 | 2584 | ocr_avail = 0; |
f2119df6 AN |
2585 | /* |
2586 | * According to SD Host Controller spec v3.00, if the Host System | |
2587 | * can afford more than 150mA, Host Driver should set XPC to 1. Also | |
2588 | * the value is meaningful only if Voltage Support in the Capabilities | |
2589 | * register is set. The actual current value is 4 times the register | |
2590 | * value. | |
2591 | */ | |
2592 | max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT); | |
2593 | ||
2594 | if (caps[0] & SDHCI_CAN_VDD_330) { | |
2595 | int max_current_330; | |
2596 | ||
8f230f45 | 2597 | ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34; |
f2119df6 AN |
2598 | |
2599 | max_current_330 = ((max_current_caps & | |
2600 | SDHCI_MAX_CURRENT_330_MASK) >> | |
2601 | SDHCI_MAX_CURRENT_330_SHIFT) * | |
2602 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
2603 | ||
2604 | if (max_current_330 > 150) | |
2605 | mmc->caps |= MMC_CAP_SET_XPC_330; | |
2606 | } | |
2607 | if (caps[0] & SDHCI_CAN_VDD_300) { | |
2608 | int max_current_300; | |
2609 | ||
8f230f45 | 2610 | ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31; |
f2119df6 AN |
2611 | |
2612 | max_current_300 = ((max_current_caps & | |
2613 | SDHCI_MAX_CURRENT_300_MASK) >> | |
2614 | SDHCI_MAX_CURRENT_300_SHIFT) * | |
2615 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
2616 | ||
2617 | if (max_current_300 > 150) | |
2618 | mmc->caps |= MMC_CAP_SET_XPC_300; | |
2619 | } | |
2620 | if (caps[0] & SDHCI_CAN_VDD_180) { | |
2621 | int max_current_180; | |
2622 | ||
8f230f45 TI |
2623 | ocr_avail |= MMC_VDD_165_195; |
2624 | ||
f2119df6 AN |
2625 | max_current_180 = ((max_current_caps & |
2626 | SDHCI_MAX_CURRENT_180_MASK) >> | |
2627 | SDHCI_MAX_CURRENT_180_SHIFT) * | |
2628 | SDHCI_MAX_CURRENT_MULTIPLIER; | |
2629 | ||
2630 | if (max_current_180 > 150) | |
2631 | mmc->caps |= MMC_CAP_SET_XPC_180; | |
5371c927 AN |
2632 | |
2633 | /* Maximum current capabilities of the host at 1.8V */ | |
2634 | if (max_current_180 >= 800) | |
2635 | mmc->caps |= MMC_CAP_MAX_CURRENT_800; | |
2636 | else if (max_current_180 >= 600) | |
2637 | mmc->caps |= MMC_CAP_MAX_CURRENT_600; | |
2638 | else if (max_current_180 >= 400) | |
2639 | mmc->caps |= MMC_CAP_MAX_CURRENT_400; | |
2640 | else | |
2641 | mmc->caps |= MMC_CAP_MAX_CURRENT_200; | |
f2119df6 AN |
2642 | } |
2643 | ||
8f230f45 TI |
2644 | mmc->ocr_avail = ocr_avail; |
2645 | mmc->ocr_avail_sdio = ocr_avail; | |
2646 | if (host->ocr_avail_sdio) | |
2647 | mmc->ocr_avail_sdio &= host->ocr_avail_sdio; | |
2648 | mmc->ocr_avail_sd = ocr_avail; | |
2649 | if (host->ocr_avail_sd) | |
2650 | mmc->ocr_avail_sd &= host->ocr_avail_sd; | |
2651 | else /* normal SD controllers don't support 1.8V */ | |
2652 | mmc->ocr_avail_sd &= ~MMC_VDD_165_195; | |
2653 | mmc->ocr_avail_mmc = ocr_avail; | |
2654 | if (host->ocr_avail_mmc) | |
2655 | mmc->ocr_avail_mmc &= host->ocr_avail_mmc; | |
146ad66e PO |
2656 | |
2657 | if (mmc->ocr_avail == 0) { | |
2658 | printk(KERN_ERR "%s: Hardware doesn't report any " | |
b69c9058 | 2659 | "support voltages.\n", mmc_hostname(mmc)); |
b8c86fc5 | 2660 | return -ENODEV; |
146ad66e PO |
2661 | } |
2662 | ||
d129bceb PO |
2663 | spin_lock_init(&host->lock); |
2664 | ||
2665 | /* | |
2134a922 PO |
2666 | * Maximum number of segments. Depends on if the hardware |
2667 | * can do scatter/gather or not. | |
d129bceb | 2668 | */ |
2134a922 | 2669 | if (host->flags & SDHCI_USE_ADMA) |
a36274e0 | 2670 | mmc->max_segs = 128; |
a13abc7b | 2671 | else if (host->flags & SDHCI_USE_SDMA) |
a36274e0 | 2672 | mmc->max_segs = 1; |
2134a922 | 2673 | else /* PIO */ |
a36274e0 | 2674 | mmc->max_segs = 128; |
d129bceb PO |
2675 | |
2676 | /* | |
bab76961 | 2677 | * Maximum number of sectors in one transfer. Limited by DMA boundary |
55db890a | 2678 | * size (512KiB). |
d129bceb | 2679 | */ |
55db890a | 2680 | mmc->max_req_size = 524288; |
d129bceb PO |
2681 | |
2682 | /* | |
2683 | * Maximum segment size. Could be one segment with the maximum number | |
2134a922 PO |
2684 | * of bytes. When doing hardware scatter/gather, each entry cannot |
2685 | * be larger than 64 KiB though. | |
d129bceb | 2686 | */ |
30652aa3 OJ |
2687 | if (host->flags & SDHCI_USE_ADMA) { |
2688 | if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC) | |
2689 | mmc->max_seg_size = 65535; | |
2690 | else | |
2691 | mmc->max_seg_size = 65536; | |
2692 | } else { | |
2134a922 | 2693 | mmc->max_seg_size = mmc->max_req_size; |
30652aa3 | 2694 | } |
d129bceb | 2695 | |
fe4a3c7a PO |
2696 | /* |
2697 | * Maximum block size. This varies from controller to controller and | |
2698 | * is specified in the capabilities register. | |
2699 | */ | |
0633f654 AV |
2700 | if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) { |
2701 | mmc->max_blk_size = 2; | |
2702 | } else { | |
f2119df6 | 2703 | mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >> |
0633f654 AV |
2704 | SDHCI_MAX_BLOCK_SHIFT; |
2705 | if (mmc->max_blk_size >= 3) { | |
2706 | printk(KERN_WARNING "%s: Invalid maximum block size, " | |
2707 | "assuming 512 bytes\n", mmc_hostname(mmc)); | |
2708 | mmc->max_blk_size = 0; | |
2709 | } | |
2710 | } | |
2711 | ||
2712 | mmc->max_blk_size = 512 << mmc->max_blk_size; | |
fe4a3c7a | 2713 | |
55db890a PO |
2714 | /* |
2715 | * Maximum block count. | |
2716 | */ | |
1388eefd | 2717 | mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; |
55db890a | 2718 | |
d129bceb PO |
2719 | /* |
2720 | * Init tasklets. | |
2721 | */ | |
2722 | tasklet_init(&host->card_tasklet, | |
2723 | sdhci_tasklet_card, (unsigned long)host); | |
2724 | tasklet_init(&host->finish_tasklet, | |
2725 | sdhci_tasklet_finish, (unsigned long)host); | |
2726 | ||
e4cad1b5 | 2727 | setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host); |
d129bceb | 2728 | |
cf2b5eea | 2729 | if (host->version >= SDHCI_SPEC_300) { |
b513ea25 AN |
2730 | init_waitqueue_head(&host->buf_ready_int); |
2731 | ||
cf2b5eea AN |
2732 | /* Initialize re-tuning timer */ |
2733 | init_timer(&host->tuning_timer); | |
2734 | host->tuning_timer.data = (unsigned long)host; | |
2735 | host->tuning_timer.function = sdhci_tuning_timer; | |
2736 | } | |
2737 | ||
dace1453 | 2738 | ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, |
b69c9058 | 2739 | mmc_hostname(mmc), host); |
d129bceb | 2740 | if (ret) |
8ef1a143 | 2741 | goto untasklet; |
d129bceb | 2742 | |
9bea3c85 MS |
2743 | host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); |
2744 | if (IS_ERR(host->vmmc)) { | |
2745 | printk(KERN_INFO "%s: no vmmc regulator found\n", mmc_hostname(mmc)); | |
2746 | host->vmmc = NULL; | |
2747 | } else { | |
2748 | regulator_enable(host->vmmc); | |
2749 | } | |
2750 | ||
2f4cbb3d | 2751 | sdhci_init(host, 0); |
d129bceb PO |
2752 | |
2753 | #ifdef CONFIG_MMC_DEBUG | |
2754 | sdhci_dumpregs(host); | |
2755 | #endif | |
2756 | ||
f9134319 | 2757 | #ifdef SDHCI_USE_LEDS_CLASS |
5dbace0c HS |
2758 | snprintf(host->led_name, sizeof(host->led_name), |
2759 | "%s::", mmc_hostname(mmc)); | |
2760 | host->led.name = host->led_name; | |
2f730fec PO |
2761 | host->led.brightness = LED_OFF; |
2762 | host->led.default_trigger = mmc_hostname(mmc); | |
2763 | host->led.brightness_set = sdhci_led_control; | |
2764 | ||
b8c86fc5 | 2765 | ret = led_classdev_register(mmc_dev(mmc), &host->led); |
2f730fec PO |
2766 | if (ret) |
2767 | goto reset; | |
2768 | #endif | |
2769 | ||
5f25a66f PO |
2770 | mmiowb(); |
2771 | ||
d129bceb PO |
2772 | mmc_add_host(mmc); |
2773 | ||
a13abc7b | 2774 | printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s\n", |
d1b26863 | 2775 | mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)), |
a13abc7b RR |
2776 | (host->flags & SDHCI_USE_ADMA) ? "ADMA" : |
2777 | (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO"); | |
d129bceb | 2778 | |
7260cf5e AV |
2779 | sdhci_enable_card_detection(host); |
2780 | ||
d129bceb PO |
2781 | return 0; |
2782 | ||
f9134319 | 2783 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
2784 | reset: |
2785 | sdhci_reset(host, SDHCI_RESET_ALL); | |
2786 | free_irq(host->irq, host); | |
2787 | #endif | |
8ef1a143 | 2788 | untasklet: |
d129bceb PO |
2789 | tasklet_kill(&host->card_tasklet); |
2790 | tasklet_kill(&host->finish_tasklet); | |
d129bceb PO |
2791 | |
2792 | return ret; | |
2793 | } | |
2794 | ||
b8c86fc5 | 2795 | EXPORT_SYMBOL_GPL(sdhci_add_host); |
d129bceb | 2796 | |
1e72859e | 2797 | void sdhci_remove_host(struct sdhci_host *host, int dead) |
b8c86fc5 | 2798 | { |
1e72859e PO |
2799 | unsigned long flags; |
2800 | ||
2801 | if (dead) { | |
2802 | spin_lock_irqsave(&host->lock, flags); | |
2803 | ||
2804 | host->flags |= SDHCI_DEVICE_DEAD; | |
2805 | ||
2806 | if (host->mrq) { | |
2807 | printk(KERN_ERR "%s: Controller removed during " | |
2808 | " transfer!\n", mmc_hostname(host->mmc)); | |
2809 | ||
2810 | host->mrq->cmd->error = -ENOMEDIUM; | |
2811 | tasklet_schedule(&host->finish_tasklet); | |
2812 | } | |
2813 | ||
2814 | spin_unlock_irqrestore(&host->lock, flags); | |
2815 | } | |
2816 | ||
7260cf5e AV |
2817 | sdhci_disable_card_detection(host); |
2818 | ||
b8c86fc5 | 2819 | mmc_remove_host(host->mmc); |
d129bceb | 2820 | |
f9134319 | 2821 | #ifdef SDHCI_USE_LEDS_CLASS |
2f730fec PO |
2822 | led_classdev_unregister(&host->led); |
2823 | #endif | |
2824 | ||
1e72859e PO |
2825 | if (!dead) |
2826 | sdhci_reset(host, SDHCI_RESET_ALL); | |
d129bceb PO |
2827 | |
2828 | free_irq(host->irq, host); | |
2829 | ||
2830 | del_timer_sync(&host->timer); | |
cf2b5eea AN |
2831 | if (host->version >= SDHCI_SPEC_300) |
2832 | del_timer_sync(&host->tuning_timer); | |
d129bceb PO |
2833 | |
2834 | tasklet_kill(&host->card_tasklet); | |
2835 | tasklet_kill(&host->finish_tasklet); | |
2134a922 | 2836 | |
9bea3c85 MS |
2837 | if (host->vmmc) { |
2838 | regulator_disable(host->vmmc); | |
2839 | regulator_put(host->vmmc); | |
2840 | } | |
2841 | ||
2134a922 PO |
2842 | kfree(host->adma_desc); |
2843 | kfree(host->align_buffer); | |
2844 | ||
2845 | host->adma_desc = NULL; | |
2846 | host->align_buffer = NULL; | |
d129bceb PO |
2847 | } |
2848 | ||
b8c86fc5 | 2849 | EXPORT_SYMBOL_GPL(sdhci_remove_host); |
d129bceb | 2850 | |
b8c86fc5 | 2851 | void sdhci_free_host(struct sdhci_host *host) |
d129bceb | 2852 | { |
b8c86fc5 | 2853 | mmc_free_host(host->mmc); |
d129bceb PO |
2854 | } |
2855 | ||
b8c86fc5 | 2856 | EXPORT_SYMBOL_GPL(sdhci_free_host); |
d129bceb PO |
2857 | |
2858 | /*****************************************************************************\ | |
2859 | * * | |
2860 | * Driver init/exit * | |
2861 | * * | |
2862 | \*****************************************************************************/ | |
2863 | ||
2864 | static int __init sdhci_drv_init(void) | |
2865 | { | |
2866 | printk(KERN_INFO DRIVER_NAME | |
52fbf9c9 | 2867 | ": Secure Digital Host Controller Interface driver\n"); |
d129bceb PO |
2868 | printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); |
2869 | ||
b8c86fc5 | 2870 | return 0; |
d129bceb PO |
2871 | } |
2872 | ||
2873 | static void __exit sdhci_drv_exit(void) | |
2874 | { | |
d129bceb PO |
2875 | } |
2876 | ||
2877 | module_init(sdhci_drv_init); | |
2878 | module_exit(sdhci_drv_exit); | |
2879 | ||
df673b22 | 2880 | module_param(debug_quirks, uint, 0444); |
67435274 | 2881 | |
32710e8f | 2882 | MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>"); |
b8c86fc5 | 2883 | MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver"); |
d129bceb | 2884 | MODULE_LICENSE("GPL"); |
67435274 | 2885 | |
df673b22 | 2886 | MODULE_PARM_DESC(debug_quirks, "Force certain quirks."); |