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d129bceb PO |
1 | /* |
2 | * linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver | |
3 | * | |
4 | * Copyright (C) 2005-2006 Pierre Ossman, All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
d129bceb PO |
11 | #include <linux/delay.h> |
12 | #include <linux/highmem.h> | |
13 | #include <linux/pci.h> | |
14 | #include <linux/dma-mapping.h> | |
15 | ||
16 | #include <linux/mmc/host.h> | |
17 | #include <linux/mmc/protocol.h> | |
18 | ||
19 | #include <asm/scatterlist.h> | |
20 | ||
21 | #include "sdhci.h" | |
22 | ||
23 | #define DRIVER_NAME "sdhci" | |
2c5f3940 | 24 | #define DRIVER_VERSION "0.12" |
d129bceb PO |
25 | |
26 | #define BUGMAIL "<sdhci-devel@list.drzeus.cx>" | |
27 | ||
d129bceb | 28 | #define DBG(f, x...) \ |
c6563178 | 29 | pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x) |
d129bceb | 30 | |
67435274 PO |
31 | static unsigned int debug_nodma = 0; |
32 | static unsigned int debug_forcedma = 0; | |
df673b22 | 33 | static unsigned int debug_quirks = 0; |
67435274 | 34 | |
d129bceb PO |
35 | static const struct pci_device_id pci_ids[] __devinitdata = { |
36 | /* handle any SD host controller */ | |
37 | {PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)}, | |
38 | { /* end: all zeroes */ }, | |
39 | }; | |
40 | ||
41 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
42 | ||
43 | static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *); | |
44 | static void sdhci_finish_data(struct sdhci_host *); | |
45 | ||
46 | static void sdhci_send_command(struct sdhci_host *, struct mmc_command *); | |
47 | static void sdhci_finish_command(struct sdhci_host *); | |
48 | ||
49 | static void sdhci_dumpregs(struct sdhci_host *host) | |
50 | { | |
51 | printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n"); | |
52 | ||
53 | printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n", | |
54 | readl(host->ioaddr + SDHCI_DMA_ADDRESS), | |
55 | readw(host->ioaddr + SDHCI_HOST_VERSION)); | |
56 | printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n", | |
57 | readw(host->ioaddr + SDHCI_BLOCK_SIZE), | |
58 | readw(host->ioaddr + SDHCI_BLOCK_COUNT)); | |
59 | printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n", | |
60 | readl(host->ioaddr + SDHCI_ARGUMENT), | |
61 | readw(host->ioaddr + SDHCI_TRANSFER_MODE)); | |
62 | printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n", | |
63 | readl(host->ioaddr + SDHCI_PRESENT_STATE), | |
64 | readb(host->ioaddr + SDHCI_HOST_CONTROL)); | |
65 | printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n", | |
66 | readb(host->ioaddr + SDHCI_POWER_CONTROL), | |
67 | readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL)); | |
68 | printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", | |
69 | readb(host->ioaddr + SDHCI_WALK_UP_CONTROL), | |
70 | readw(host->ioaddr + SDHCI_CLOCK_CONTROL)); | |
71 | printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", | |
72 | readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL), | |
73 | readl(host->ioaddr + SDHCI_INT_STATUS)); | |
74 | printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n", | |
75 | readl(host->ioaddr + SDHCI_INT_ENABLE), | |
76 | readl(host->ioaddr + SDHCI_SIGNAL_ENABLE)); | |
77 | printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n", | |
78 | readw(host->ioaddr + SDHCI_ACMD12_ERR), | |
79 | readw(host->ioaddr + SDHCI_SLOT_INT_STATUS)); | |
80 | printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n", | |
81 | readl(host->ioaddr + SDHCI_CAPABILITIES), | |
82 | readl(host->ioaddr + SDHCI_MAX_CURRENT)); | |
83 | ||
84 | printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n"); | |
85 | } | |
86 | ||
87 | /*****************************************************************************\ | |
88 | * * | |
89 | * Low level functions * | |
90 | * * | |
91 | \*****************************************************************************/ | |
92 | ||
93 | static void sdhci_reset(struct sdhci_host *host, u8 mask) | |
94 | { | |
e16514d8 PO |
95 | unsigned long timeout; |
96 | ||
d129bceb PO |
97 | writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET); |
98 | ||
e16514d8 | 99 | if (mask & SDHCI_RESET_ALL) |
d129bceb PO |
100 | host->clock = 0; |
101 | ||
e16514d8 PO |
102 | /* Wait max 100 ms */ |
103 | timeout = 100; | |
104 | ||
105 | /* hw clears the bit when it's done */ | |
106 | while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) { | |
107 | if (timeout == 0) { | |
108 | printk(KERN_ERR "%s: Reset 0x%x never completed. " | |
109 | "Please report this to " BUGMAIL ".\n", | |
110 | mmc_hostname(host->mmc), (int)mask); | |
111 | sdhci_dumpregs(host); | |
112 | return; | |
113 | } | |
114 | timeout--; | |
115 | mdelay(1); | |
d129bceb PO |
116 | } |
117 | } | |
118 | ||
119 | static void sdhci_init(struct sdhci_host *host) | |
120 | { | |
121 | u32 intmask; | |
122 | ||
123 | sdhci_reset(host, SDHCI_RESET_ALL); | |
124 | ||
3192a28f PO |
125 | intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | |
126 | SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | | |
127 | SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | | |
128 | SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT | | |
a406f5a3 | 129 | SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | |
3192a28f | 130 | SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE; |
d129bceb PO |
131 | |
132 | writel(intmask, host->ioaddr + SDHCI_INT_ENABLE); | |
133 | writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE); | |
d129bceb PO |
134 | } |
135 | ||
136 | static void sdhci_activate_led(struct sdhci_host *host) | |
137 | { | |
138 | u8 ctrl; | |
139 | ||
140 | ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL); | |
141 | ctrl |= SDHCI_CTRL_LED; | |
142 | writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL); | |
143 | } | |
144 | ||
145 | static void sdhci_deactivate_led(struct sdhci_host *host) | |
146 | { | |
147 | u8 ctrl; | |
148 | ||
149 | ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL); | |
150 | ctrl &= ~SDHCI_CTRL_LED; | |
151 | writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL); | |
152 | } | |
153 | ||
154 | /*****************************************************************************\ | |
155 | * * | |
156 | * Core functions * | |
157 | * * | |
158 | \*****************************************************************************/ | |
159 | ||
160 | static inline char* sdhci_kmap_sg(struct sdhci_host* host) | |
161 | { | |
162 | host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ); | |
163 | return host->mapped_sg + host->cur_sg->offset; | |
164 | } | |
165 | ||
166 | static inline void sdhci_kunmap_sg(struct sdhci_host* host) | |
167 | { | |
168 | kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ); | |
169 | } | |
170 | ||
171 | static inline int sdhci_next_sg(struct sdhci_host* host) | |
172 | { | |
173 | /* | |
174 | * Skip to next SG entry. | |
175 | */ | |
176 | host->cur_sg++; | |
177 | host->num_sg--; | |
178 | ||
179 | /* | |
180 | * Any entries left? | |
181 | */ | |
182 | if (host->num_sg > 0) { | |
183 | host->offset = 0; | |
184 | host->remain = host->cur_sg->length; | |
185 | } | |
186 | ||
187 | return host->num_sg; | |
188 | } | |
189 | ||
a406f5a3 | 190 | static void sdhci_read_block_pio(struct sdhci_host *host) |
d129bceb | 191 | { |
a406f5a3 PO |
192 | int blksize, chunk_remain; |
193 | u32 data; | |
d129bceb | 194 | char *buffer; |
a406f5a3 | 195 | int size; |
d129bceb | 196 | |
a406f5a3 | 197 | DBG("PIO reading\n"); |
d129bceb | 198 | |
a406f5a3 PO |
199 | blksize = host->data->blksz; |
200 | chunk_remain = 0; | |
201 | data = 0; | |
d129bceb PO |
202 | |
203 | buffer = sdhci_kmap_sg(host) + host->offset; | |
204 | ||
a406f5a3 PO |
205 | while (blksize) { |
206 | if (chunk_remain == 0) { | |
207 | data = readl(host->ioaddr + SDHCI_BUFFER); | |
208 | chunk_remain = min(blksize, 4); | |
209 | } | |
d129bceb | 210 | |
a406f5a3 PO |
211 | size = min(host->size, host->remain); |
212 | size = min(size, chunk_remain); | |
d129bceb | 213 | |
a406f5a3 PO |
214 | chunk_remain -= size; |
215 | blksize -= size; | |
216 | host->offset += size; | |
217 | host->remain -= size; | |
218 | host->size -= size; | |
219 | while (size) { | |
220 | *buffer = data & 0xFF; | |
221 | buffer++; | |
222 | data >>= 8; | |
223 | size--; | |
224 | } | |
d129bceb | 225 | |
a406f5a3 PO |
226 | if (host->remain == 0) { |
227 | sdhci_kunmap_sg(host); | |
228 | if (sdhci_next_sg(host) == 0) { | |
229 | BUG_ON(blksize != 0); | |
230 | return; | |
231 | } | |
232 | buffer = sdhci_kmap_sg(host); | |
d129bceb | 233 | } |
a406f5a3 | 234 | } |
d129bceb | 235 | |
a406f5a3 PO |
236 | sdhci_kunmap_sg(host); |
237 | } | |
d129bceb | 238 | |
a406f5a3 PO |
239 | static void sdhci_write_block_pio(struct sdhci_host *host) |
240 | { | |
241 | int blksize, chunk_remain; | |
242 | u32 data; | |
243 | char *buffer; | |
244 | int bytes, size; | |
d129bceb | 245 | |
a406f5a3 PO |
246 | DBG("PIO writing\n"); |
247 | ||
248 | blksize = host->data->blksz; | |
249 | chunk_remain = 4; | |
250 | data = 0; | |
251 | ||
252 | bytes = 0; | |
253 | buffer = sdhci_kmap_sg(host) + host->offset; | |
d129bceb | 254 | |
a406f5a3 PO |
255 | while (blksize) { |
256 | size = min(host->size, host->remain); | |
257 | size = min(size, chunk_remain); | |
258 | ||
259 | chunk_remain -= size; | |
260 | blksize -= size; | |
d129bceb PO |
261 | host->offset += size; |
262 | host->remain -= size; | |
d129bceb | 263 | host->size -= size; |
a406f5a3 PO |
264 | while (size) { |
265 | data >>= 8; | |
266 | data |= (u32)*buffer << 24; | |
267 | buffer++; | |
268 | size--; | |
269 | } | |
270 | ||
271 | if (chunk_remain == 0) { | |
272 | writel(data, host->ioaddr + SDHCI_BUFFER); | |
273 | chunk_remain = min(blksize, 4); | |
274 | } | |
d129bceb PO |
275 | |
276 | if (host->remain == 0) { | |
277 | sdhci_kunmap_sg(host); | |
278 | if (sdhci_next_sg(host) == 0) { | |
a406f5a3 | 279 | BUG_ON(blksize != 0); |
d129bceb PO |
280 | return; |
281 | } | |
282 | buffer = sdhci_kmap_sg(host); | |
283 | } | |
284 | } | |
285 | ||
286 | sdhci_kunmap_sg(host); | |
a406f5a3 PO |
287 | } |
288 | ||
289 | static void sdhci_transfer_pio(struct sdhci_host *host) | |
290 | { | |
291 | u32 mask; | |
292 | ||
293 | BUG_ON(!host->data); | |
294 | ||
295 | if (host->size == 0) | |
296 | return; | |
297 | ||
298 | if (host->data->flags & MMC_DATA_READ) | |
299 | mask = SDHCI_DATA_AVAILABLE; | |
300 | else | |
301 | mask = SDHCI_SPACE_AVAILABLE; | |
302 | ||
303 | while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) { | |
304 | if (host->data->flags & MMC_DATA_READ) | |
305 | sdhci_read_block_pio(host); | |
306 | else | |
307 | sdhci_write_block_pio(host); | |
308 | ||
309 | if (host->size == 0) | |
310 | break; | |
311 | ||
312 | BUG_ON(host->num_sg == 0); | |
313 | } | |
d129bceb | 314 | |
a406f5a3 | 315 | DBG("PIO transfer complete.\n"); |
d129bceb PO |
316 | } |
317 | ||
318 | static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data) | |
319 | { | |
1c8cde92 PO |
320 | u8 count; |
321 | unsigned target_timeout, current_timeout; | |
d129bceb PO |
322 | |
323 | WARN_ON(host->data); | |
324 | ||
c7fa9963 | 325 | if (data == NULL) |
d129bceb | 326 | return; |
d129bceb PO |
327 | |
328 | DBG("blksz %04x blks %04x flags %08x\n", | |
a3fd4a1b | 329 | data->blksz, data->blocks, data->flags); |
d129bceb PO |
330 | DBG("tsac %d ms nsac %d clk\n", |
331 | data->timeout_ns / 1000000, data->timeout_clks); | |
332 | ||
bab76961 PO |
333 | /* Sanity checks */ |
334 | BUG_ON(data->blksz * data->blocks > 524288); | |
1d676e02 PO |
335 | BUG_ON(data->blksz > host->max_block); |
336 | BUG_ON(data->blocks > 65535); | |
bab76961 | 337 | |
1c8cde92 PO |
338 | /* timeout in us */ |
339 | target_timeout = data->timeout_ns / 1000 + | |
340 | data->timeout_clks / host->clock; | |
341 | ||
342 | /* | |
343 | * Figure out needed cycles. | |
344 | * We do this in steps in order to fit inside a 32 bit int. | |
345 | * The first step is the minimum timeout, which will have a | |
346 | * minimum resolution of 6 bits: | |
347 | * (1) 2^13*1000 > 2^22, | |
348 | * (2) host->timeout_clk < 2^16 | |
349 | * => | |
350 | * (1) / (2) > 2^6 | |
351 | */ | |
352 | count = 0; | |
353 | current_timeout = (1 << 13) * 1000 / host->timeout_clk; | |
354 | while (current_timeout < target_timeout) { | |
355 | count++; | |
356 | current_timeout <<= 1; | |
357 | if (count >= 0xF) | |
358 | break; | |
359 | } | |
360 | ||
361 | if (count >= 0xF) { | |
362 | printk(KERN_WARNING "%s: Too large timeout requested!\n", | |
363 | mmc_hostname(host->mmc)); | |
364 | count = 0xE; | |
365 | } | |
366 | ||
367 | writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL); | |
368 | ||
d129bceb PO |
369 | if (host->flags & SDHCI_USE_DMA) { |
370 | int count; | |
371 | ||
372 | count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len, | |
373 | (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE); | |
374 | BUG_ON(count != 1); | |
375 | ||
376 | writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS); | |
377 | } else { | |
a3fd4a1b | 378 | host->size = data->blksz * data->blocks; |
d129bceb PO |
379 | |
380 | host->cur_sg = data->sg; | |
381 | host->num_sg = data->sg_len; | |
382 | ||
383 | host->offset = 0; | |
384 | host->remain = host->cur_sg->length; | |
385 | } | |
c7fa9963 | 386 | |
bab76961 PO |
387 | /* We do not handle DMA boundaries, so set it to max (512 KiB) */ |
388 | writew(SDHCI_MAKE_BLKSZ(7, data->blksz), | |
389 | host->ioaddr + SDHCI_BLOCK_SIZE); | |
c7fa9963 PO |
390 | writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT); |
391 | } | |
392 | ||
393 | static void sdhci_set_transfer_mode(struct sdhci_host *host, | |
394 | struct mmc_data *data) | |
395 | { | |
396 | u16 mode; | |
397 | ||
398 | WARN_ON(host->data); | |
399 | ||
400 | if (data == NULL) | |
401 | return; | |
402 | ||
403 | mode = SDHCI_TRNS_BLK_CNT_EN; | |
404 | if (data->blocks > 1) | |
405 | mode |= SDHCI_TRNS_MULTI; | |
406 | if (data->flags & MMC_DATA_READ) | |
407 | mode |= SDHCI_TRNS_READ; | |
408 | if (host->flags & SDHCI_USE_DMA) | |
409 | mode |= SDHCI_TRNS_DMA; | |
410 | ||
411 | writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE); | |
d129bceb PO |
412 | } |
413 | ||
414 | static void sdhci_finish_data(struct sdhci_host *host) | |
415 | { | |
416 | struct mmc_data *data; | |
d129bceb PO |
417 | u16 blocks; |
418 | ||
419 | BUG_ON(!host->data); | |
420 | ||
421 | data = host->data; | |
422 | host->data = NULL; | |
423 | ||
424 | if (host->flags & SDHCI_USE_DMA) { | |
425 | pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len, | |
426 | (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE); | |
d129bceb PO |
427 | } |
428 | ||
429 | /* | |
430 | * Controller doesn't count down when in single block mode. | |
431 | */ | |
432 | if ((data->blocks == 1) && (data->error == MMC_ERR_NONE)) | |
433 | blocks = 0; | |
434 | else | |
435 | blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT); | |
a3fd4a1b | 436 | data->bytes_xfered = data->blksz * (data->blocks - blocks); |
d129bceb PO |
437 | |
438 | if ((data->error == MMC_ERR_NONE) && blocks) { | |
439 | printk(KERN_ERR "%s: Controller signalled completion even " | |
440 | "though there were blocks left. Please report this " | |
441 | "to " BUGMAIL ".\n", mmc_hostname(host->mmc)); | |
442 | data->error = MMC_ERR_FAILED; | |
443 | } | |
444 | ||
445 | if (host->size != 0) { | |
446 | printk(KERN_ERR "%s: %d bytes were left untransferred. " | |
447 | "Please report this to " BUGMAIL ".\n", | |
448 | mmc_hostname(host->mmc), host->size); | |
449 | data->error = MMC_ERR_FAILED; | |
450 | } | |
451 | ||
452 | DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered); | |
453 | ||
454 | if (data->stop) { | |
455 | /* | |
456 | * The controller needs a reset of internal state machines | |
457 | * upon error conditions. | |
458 | */ | |
459 | if (data->error != MMC_ERR_NONE) { | |
460 | sdhci_reset(host, SDHCI_RESET_CMD); | |
461 | sdhci_reset(host, SDHCI_RESET_DATA); | |
462 | } | |
463 | ||
464 | sdhci_send_command(host, data->stop); | |
465 | } else | |
466 | tasklet_schedule(&host->finish_tasklet); | |
467 | } | |
468 | ||
469 | static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) | |
470 | { | |
471 | int flags; | |
fd2208d7 | 472 | u32 mask; |
7cb2c76f | 473 | unsigned long timeout; |
d129bceb PO |
474 | |
475 | WARN_ON(host->cmd); | |
476 | ||
477 | DBG("Sending cmd (%x)\n", cmd->opcode); | |
478 | ||
479 | /* Wait max 10 ms */ | |
7cb2c76f | 480 | timeout = 10; |
fd2208d7 PO |
481 | |
482 | mask = SDHCI_CMD_INHIBIT; | |
483 | if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY)) | |
484 | mask |= SDHCI_DATA_INHIBIT; | |
485 | ||
486 | /* We shouldn't wait for data inihibit for stop commands, even | |
487 | though they might use busy signaling */ | |
488 | if (host->mrq->data && (cmd == host->mrq->data->stop)) | |
489 | mask &= ~SDHCI_DATA_INHIBIT; | |
490 | ||
491 | while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) { | |
7cb2c76f | 492 | if (timeout == 0) { |
d129bceb | 493 | printk(KERN_ERR "%s: Controller never released " |
fd2208d7 | 494 | "inhibit bit(s). Please report this to " |
d129bceb PO |
495 | BUGMAIL ".\n", mmc_hostname(host->mmc)); |
496 | sdhci_dumpregs(host); | |
497 | cmd->error = MMC_ERR_FAILED; | |
498 | tasklet_schedule(&host->finish_tasklet); | |
499 | return; | |
500 | } | |
7cb2c76f PO |
501 | timeout--; |
502 | mdelay(1); | |
503 | } | |
d129bceb PO |
504 | |
505 | mod_timer(&host->timer, jiffies + 10 * HZ); | |
506 | ||
507 | host->cmd = cmd; | |
508 | ||
509 | sdhci_prepare_data(host, cmd->data); | |
510 | ||
511 | writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT); | |
512 | ||
c7fa9963 PO |
513 | sdhci_set_transfer_mode(host, cmd->data); |
514 | ||
d129bceb PO |
515 | if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { |
516 | printk(KERN_ERR "%s: Unsupported response type! " | |
517 | "Please report this to " BUGMAIL ".\n", | |
518 | mmc_hostname(host->mmc)); | |
519 | cmd->error = MMC_ERR_INVALID; | |
520 | tasklet_schedule(&host->finish_tasklet); | |
521 | return; | |
522 | } | |
523 | ||
524 | if (!(cmd->flags & MMC_RSP_PRESENT)) | |
525 | flags = SDHCI_CMD_RESP_NONE; | |
526 | else if (cmd->flags & MMC_RSP_136) | |
527 | flags = SDHCI_CMD_RESP_LONG; | |
528 | else if (cmd->flags & MMC_RSP_BUSY) | |
529 | flags = SDHCI_CMD_RESP_SHORT_BUSY; | |
530 | else | |
531 | flags = SDHCI_CMD_RESP_SHORT; | |
532 | ||
533 | if (cmd->flags & MMC_RSP_CRC) | |
534 | flags |= SDHCI_CMD_CRC; | |
535 | if (cmd->flags & MMC_RSP_OPCODE) | |
536 | flags |= SDHCI_CMD_INDEX; | |
537 | if (cmd->data) | |
538 | flags |= SDHCI_CMD_DATA; | |
539 | ||
540 | writel(SDHCI_MAKE_CMD(cmd->opcode, flags), | |
541 | host->ioaddr + SDHCI_COMMAND); | |
542 | } | |
543 | ||
544 | static void sdhci_finish_command(struct sdhci_host *host) | |
545 | { | |
546 | int i; | |
547 | ||
548 | BUG_ON(host->cmd == NULL); | |
549 | ||
550 | if (host->cmd->flags & MMC_RSP_PRESENT) { | |
551 | if (host->cmd->flags & MMC_RSP_136) { | |
552 | /* CRC is stripped so we need to do some shifting. */ | |
553 | for (i = 0;i < 4;i++) { | |
554 | host->cmd->resp[i] = readl(host->ioaddr + | |
555 | SDHCI_RESPONSE + (3-i)*4) << 8; | |
556 | if (i != 3) | |
557 | host->cmd->resp[i] |= | |
558 | readb(host->ioaddr + | |
559 | SDHCI_RESPONSE + (3-i)*4-1); | |
560 | } | |
561 | } else { | |
562 | host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE); | |
563 | } | |
564 | } | |
565 | ||
566 | host->cmd->error = MMC_ERR_NONE; | |
567 | ||
568 | DBG("Ending cmd (%x)\n", host->cmd->opcode); | |
569 | ||
3192a28f | 570 | if (host->cmd->data) |
d129bceb | 571 | host->data = host->cmd->data; |
3192a28f | 572 | else |
d129bceb PO |
573 | tasklet_schedule(&host->finish_tasklet); |
574 | ||
575 | host->cmd = NULL; | |
576 | } | |
577 | ||
578 | static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) | |
579 | { | |
580 | int div; | |
581 | u16 clk; | |
7cb2c76f | 582 | unsigned long timeout; |
d129bceb PO |
583 | |
584 | if (clock == host->clock) | |
585 | return; | |
586 | ||
587 | writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); | |
588 | ||
589 | if (clock == 0) | |
590 | goto out; | |
591 | ||
592 | for (div = 1;div < 256;div *= 2) { | |
593 | if ((host->max_clk / div) <= clock) | |
594 | break; | |
595 | } | |
596 | div >>= 1; | |
597 | ||
598 | clk = div << SDHCI_DIVIDER_SHIFT; | |
599 | clk |= SDHCI_CLOCK_INT_EN; | |
600 | writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL); | |
601 | ||
602 | /* Wait max 10 ms */ | |
7cb2c76f PO |
603 | timeout = 10; |
604 | while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL)) | |
605 | & SDHCI_CLOCK_INT_STABLE)) { | |
606 | if (timeout == 0) { | |
d129bceb PO |
607 | printk(KERN_ERR "%s: Internal clock never stabilised. " |
608 | "Please report this to " BUGMAIL ".\n", | |
609 | mmc_hostname(host->mmc)); | |
610 | sdhci_dumpregs(host); | |
611 | return; | |
612 | } | |
7cb2c76f PO |
613 | timeout--; |
614 | mdelay(1); | |
615 | } | |
d129bceb PO |
616 | |
617 | clk |= SDHCI_CLOCK_CARD_EN; | |
618 | writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL); | |
619 | ||
620 | out: | |
621 | host->clock = clock; | |
622 | } | |
623 | ||
146ad66e PO |
624 | static void sdhci_set_power(struct sdhci_host *host, unsigned short power) |
625 | { | |
626 | u8 pwr; | |
627 | ||
628 | if (host->power == power) | |
629 | return; | |
630 | ||
631 | writeb(0, host->ioaddr + SDHCI_POWER_CONTROL); | |
632 | ||
633 | if (power == (unsigned short)-1) | |
634 | goto out; | |
635 | ||
636 | pwr = SDHCI_POWER_ON; | |
637 | ||
638 | switch (power) { | |
639 | case MMC_VDD_170: | |
640 | case MMC_VDD_180: | |
641 | case MMC_VDD_190: | |
642 | pwr |= SDHCI_POWER_180; | |
643 | break; | |
644 | case MMC_VDD_290: | |
645 | case MMC_VDD_300: | |
646 | case MMC_VDD_310: | |
647 | pwr |= SDHCI_POWER_300; | |
648 | break; | |
649 | case MMC_VDD_320: | |
650 | case MMC_VDD_330: | |
651 | case MMC_VDD_340: | |
652 | pwr |= SDHCI_POWER_330; | |
653 | break; | |
654 | default: | |
655 | BUG(); | |
656 | } | |
657 | ||
658 | writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL); | |
659 | ||
660 | out: | |
661 | host->power = power; | |
662 | } | |
663 | ||
d129bceb PO |
664 | /*****************************************************************************\ |
665 | * * | |
666 | * MMC callbacks * | |
667 | * * | |
668 | \*****************************************************************************/ | |
669 | ||
670 | static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
671 | { | |
672 | struct sdhci_host *host; | |
673 | unsigned long flags; | |
674 | ||
675 | host = mmc_priv(mmc); | |
676 | ||
677 | spin_lock_irqsave(&host->lock, flags); | |
678 | ||
679 | WARN_ON(host->mrq != NULL); | |
680 | ||
681 | sdhci_activate_led(host); | |
682 | ||
683 | host->mrq = mrq; | |
684 | ||
685 | if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { | |
686 | host->mrq->cmd->error = MMC_ERR_TIMEOUT; | |
687 | tasklet_schedule(&host->finish_tasklet); | |
688 | } else | |
689 | sdhci_send_command(host, mrq->cmd); | |
690 | ||
691 | spin_unlock_irqrestore(&host->lock, flags); | |
692 | } | |
693 | ||
694 | static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
695 | { | |
696 | struct sdhci_host *host; | |
697 | unsigned long flags; | |
698 | u8 ctrl; | |
699 | ||
700 | host = mmc_priv(mmc); | |
701 | ||
702 | spin_lock_irqsave(&host->lock, flags); | |
703 | ||
d129bceb PO |
704 | /* |
705 | * Reset the chip on each power off. | |
706 | * Should clear out any weird states. | |
707 | */ | |
708 | if (ios->power_mode == MMC_POWER_OFF) { | |
709 | writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE); | |
d129bceb | 710 | sdhci_init(host); |
d129bceb PO |
711 | } |
712 | ||
713 | sdhci_set_clock(host, ios->clock); | |
714 | ||
715 | if (ios->power_mode == MMC_POWER_OFF) | |
146ad66e | 716 | sdhci_set_power(host, -1); |
d129bceb | 717 | else |
146ad66e | 718 | sdhci_set_power(host, ios->vdd); |
d129bceb PO |
719 | |
720 | ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL); | |
721 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
722 | ctrl |= SDHCI_CTRL_4BITBUS; | |
723 | else | |
724 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
725 | writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL); | |
726 | ||
727 | spin_unlock_irqrestore(&host->lock, flags); | |
728 | } | |
729 | ||
730 | static int sdhci_get_ro(struct mmc_host *mmc) | |
731 | { | |
732 | struct sdhci_host *host; | |
733 | unsigned long flags; | |
734 | int present; | |
735 | ||
736 | host = mmc_priv(mmc); | |
737 | ||
738 | spin_lock_irqsave(&host->lock, flags); | |
739 | ||
740 | present = readl(host->ioaddr + SDHCI_PRESENT_STATE); | |
741 | ||
742 | spin_unlock_irqrestore(&host->lock, flags); | |
743 | ||
744 | return !(present & SDHCI_WRITE_PROTECT); | |
745 | } | |
746 | ||
747 | static struct mmc_host_ops sdhci_ops = { | |
748 | .request = sdhci_request, | |
749 | .set_ios = sdhci_set_ios, | |
750 | .get_ro = sdhci_get_ro, | |
751 | }; | |
752 | ||
753 | /*****************************************************************************\ | |
754 | * * | |
755 | * Tasklets * | |
756 | * * | |
757 | \*****************************************************************************/ | |
758 | ||
759 | static void sdhci_tasklet_card(unsigned long param) | |
760 | { | |
761 | struct sdhci_host *host; | |
762 | unsigned long flags; | |
763 | ||
764 | host = (struct sdhci_host*)param; | |
765 | ||
766 | spin_lock_irqsave(&host->lock, flags); | |
767 | ||
768 | if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { | |
769 | if (host->mrq) { | |
770 | printk(KERN_ERR "%s: Card removed during transfer!\n", | |
771 | mmc_hostname(host->mmc)); | |
772 | printk(KERN_ERR "%s: Resetting controller.\n", | |
773 | mmc_hostname(host->mmc)); | |
774 | ||
775 | sdhci_reset(host, SDHCI_RESET_CMD); | |
776 | sdhci_reset(host, SDHCI_RESET_DATA); | |
777 | ||
778 | host->mrq->cmd->error = MMC_ERR_FAILED; | |
779 | tasklet_schedule(&host->finish_tasklet); | |
780 | } | |
781 | } | |
782 | ||
783 | spin_unlock_irqrestore(&host->lock, flags); | |
784 | ||
785 | mmc_detect_change(host->mmc, msecs_to_jiffies(500)); | |
786 | } | |
787 | ||
788 | static void sdhci_tasklet_finish(unsigned long param) | |
789 | { | |
790 | struct sdhci_host *host; | |
791 | unsigned long flags; | |
792 | struct mmc_request *mrq; | |
793 | ||
794 | host = (struct sdhci_host*)param; | |
795 | ||
796 | spin_lock_irqsave(&host->lock, flags); | |
797 | ||
798 | del_timer(&host->timer); | |
799 | ||
800 | mrq = host->mrq; | |
801 | ||
802 | DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode); | |
803 | ||
804 | /* | |
805 | * The controller needs a reset of internal state machines | |
806 | * upon error conditions. | |
807 | */ | |
808 | if ((mrq->cmd->error != MMC_ERR_NONE) || | |
809 | (mrq->data && ((mrq->data->error != MMC_ERR_NONE) || | |
810 | (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) { | |
811 | sdhci_reset(host, SDHCI_RESET_CMD); | |
812 | sdhci_reset(host, SDHCI_RESET_DATA); | |
813 | } | |
814 | ||
815 | host->mrq = NULL; | |
816 | host->cmd = NULL; | |
817 | host->data = NULL; | |
818 | ||
819 | sdhci_deactivate_led(host); | |
820 | ||
821 | spin_unlock_irqrestore(&host->lock, flags); | |
822 | ||
823 | mmc_request_done(host->mmc, mrq); | |
824 | } | |
825 | ||
826 | static void sdhci_timeout_timer(unsigned long data) | |
827 | { | |
828 | struct sdhci_host *host; | |
829 | unsigned long flags; | |
830 | ||
831 | host = (struct sdhci_host*)data; | |
832 | ||
833 | spin_lock_irqsave(&host->lock, flags); | |
834 | ||
835 | if (host->mrq) { | |
836 | printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. " | |
837 | "Please report this to " BUGMAIL ".\n", | |
838 | mmc_hostname(host->mmc)); | |
839 | sdhci_dumpregs(host); | |
840 | ||
841 | if (host->data) { | |
842 | host->data->error = MMC_ERR_TIMEOUT; | |
843 | sdhci_finish_data(host); | |
844 | } else { | |
845 | if (host->cmd) | |
846 | host->cmd->error = MMC_ERR_TIMEOUT; | |
847 | else | |
848 | host->mrq->cmd->error = MMC_ERR_TIMEOUT; | |
849 | ||
850 | tasklet_schedule(&host->finish_tasklet); | |
851 | } | |
852 | } | |
853 | ||
854 | spin_unlock_irqrestore(&host->lock, flags); | |
855 | } | |
856 | ||
857 | /*****************************************************************************\ | |
858 | * * | |
859 | * Interrupt handling * | |
860 | * * | |
861 | \*****************************************************************************/ | |
862 | ||
863 | static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) | |
864 | { | |
865 | BUG_ON(intmask == 0); | |
866 | ||
867 | if (!host->cmd) { | |
868 | printk(KERN_ERR "%s: Got command interrupt even though no " | |
869 | "command operation was in progress.\n", | |
870 | mmc_hostname(host->mmc)); | |
871 | printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n", | |
872 | mmc_hostname(host->mmc)); | |
873 | sdhci_dumpregs(host); | |
874 | return; | |
875 | } | |
876 | ||
877 | if (intmask & SDHCI_INT_RESPONSE) | |
878 | sdhci_finish_command(host); | |
879 | else { | |
880 | if (intmask & SDHCI_INT_TIMEOUT) | |
881 | host->cmd->error = MMC_ERR_TIMEOUT; | |
882 | else if (intmask & SDHCI_INT_CRC) | |
883 | host->cmd->error = MMC_ERR_BADCRC; | |
884 | else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX)) | |
885 | host->cmd->error = MMC_ERR_FAILED; | |
886 | else | |
887 | host->cmd->error = MMC_ERR_INVALID; | |
888 | ||
889 | tasklet_schedule(&host->finish_tasklet); | |
890 | } | |
891 | } | |
892 | ||
893 | static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) | |
894 | { | |
895 | BUG_ON(intmask == 0); | |
896 | ||
897 | if (!host->data) { | |
898 | /* | |
899 | * A data end interrupt is sent together with the response | |
900 | * for the stop command. | |
901 | */ | |
902 | if (intmask & SDHCI_INT_DATA_END) | |
903 | return; | |
904 | ||
905 | printk(KERN_ERR "%s: Got data interrupt even though no " | |
906 | "data operation was in progress.\n", | |
907 | mmc_hostname(host->mmc)); | |
908 | printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n", | |
909 | mmc_hostname(host->mmc)); | |
910 | sdhci_dumpregs(host); | |
911 | ||
912 | return; | |
913 | } | |
914 | ||
915 | if (intmask & SDHCI_INT_DATA_TIMEOUT) | |
916 | host->data->error = MMC_ERR_TIMEOUT; | |
917 | else if (intmask & SDHCI_INT_DATA_CRC) | |
918 | host->data->error = MMC_ERR_BADCRC; | |
919 | else if (intmask & SDHCI_INT_DATA_END_BIT) | |
920 | host->data->error = MMC_ERR_FAILED; | |
921 | ||
922 | if (host->data->error != MMC_ERR_NONE) | |
923 | sdhci_finish_data(host); | |
924 | else { | |
a406f5a3 | 925 | if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) |
d129bceb PO |
926 | sdhci_transfer_pio(host); |
927 | ||
928 | if (intmask & SDHCI_INT_DATA_END) | |
929 | sdhci_finish_data(host); | |
930 | } | |
931 | } | |
932 | ||
933 | static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs) | |
934 | { | |
935 | irqreturn_t result; | |
936 | struct sdhci_host* host = dev_id; | |
937 | u32 intmask; | |
938 | ||
939 | spin_lock(&host->lock); | |
940 | ||
941 | intmask = readl(host->ioaddr + SDHCI_INT_STATUS); | |
942 | ||
943 | if (!intmask) { | |
944 | result = IRQ_NONE; | |
945 | goto out; | |
946 | } | |
947 | ||
948 | DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask); | |
949 | ||
3192a28f PO |
950 | if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { |
951 | writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE), | |
952 | host->ioaddr + SDHCI_INT_STATUS); | |
d129bceb | 953 | tasklet_schedule(&host->card_tasklet); |
3192a28f | 954 | } |
d129bceb | 955 | |
3192a28f | 956 | intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); |
d129bceb | 957 | |
3192a28f | 958 | if (intmask & SDHCI_INT_CMD_MASK) { |
d129bceb PO |
959 | writel(intmask & SDHCI_INT_CMD_MASK, |
960 | host->ioaddr + SDHCI_INT_STATUS); | |
3192a28f | 961 | sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK); |
d129bceb PO |
962 | } |
963 | ||
964 | if (intmask & SDHCI_INT_DATA_MASK) { | |
d129bceb PO |
965 | writel(intmask & SDHCI_INT_DATA_MASK, |
966 | host->ioaddr + SDHCI_INT_STATUS); | |
3192a28f | 967 | sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK); |
d129bceb PO |
968 | } |
969 | ||
970 | intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK); | |
971 | ||
d129bceb | 972 | if (intmask & SDHCI_INT_BUS_POWER) { |
3192a28f | 973 | printk(KERN_ERR "%s: Card is consuming too much power!\n", |
d129bceb | 974 | mmc_hostname(host->mmc)); |
3192a28f | 975 | writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS); |
d129bceb PO |
976 | } |
977 | ||
3192a28f PO |
978 | intmask &= SDHCI_INT_BUS_POWER; |
979 | ||
980 | if (intmask) { | |
981 | printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please " | |
d129bceb | 982 | "report this to " BUGMAIL ".\n", |
3192a28f | 983 | mmc_hostname(host->mmc), intmask); |
d129bceb PO |
984 | sdhci_dumpregs(host); |
985 | ||
d129bceb | 986 | writel(intmask, host->ioaddr + SDHCI_INT_STATUS); |
3192a28f | 987 | } |
d129bceb PO |
988 | |
989 | result = IRQ_HANDLED; | |
990 | ||
991 | out: | |
992 | spin_unlock(&host->lock); | |
993 | ||
994 | return result; | |
995 | } | |
996 | ||
997 | /*****************************************************************************\ | |
998 | * * | |
999 | * Suspend/resume * | |
1000 | * * | |
1001 | \*****************************************************************************/ | |
1002 | ||
1003 | #ifdef CONFIG_PM | |
1004 | ||
1005 | static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state) | |
1006 | { | |
1007 | struct sdhci_chip *chip; | |
1008 | int i, ret; | |
1009 | ||
1010 | chip = pci_get_drvdata(pdev); | |
1011 | if (!chip) | |
1012 | return 0; | |
1013 | ||
1014 | DBG("Suspending...\n"); | |
1015 | ||
1016 | for (i = 0;i < chip->num_slots;i++) { | |
1017 | if (!chip->hosts[i]) | |
1018 | continue; | |
1019 | ret = mmc_suspend_host(chip->hosts[i]->mmc, state); | |
1020 | if (ret) { | |
1021 | for (i--;i >= 0;i--) | |
1022 | mmc_resume_host(chip->hosts[i]->mmc); | |
1023 | return ret; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | pci_save_state(pdev); | |
1028 | pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); | |
1029 | pci_disable_device(pdev); | |
1030 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | static int sdhci_resume (struct pci_dev *pdev) | |
1036 | { | |
1037 | struct sdhci_chip *chip; | |
1038 | int i, ret; | |
1039 | ||
1040 | chip = pci_get_drvdata(pdev); | |
1041 | if (!chip) | |
1042 | return 0; | |
1043 | ||
1044 | DBG("Resuming...\n"); | |
1045 | ||
1046 | pci_set_power_state(pdev, PCI_D0); | |
1047 | pci_restore_state(pdev); | |
1048 | pci_enable_device(pdev); | |
1049 | ||
1050 | for (i = 0;i < chip->num_slots;i++) { | |
1051 | if (!chip->hosts[i]) | |
1052 | continue; | |
1053 | if (chip->hosts[i]->flags & SDHCI_USE_DMA) | |
1054 | pci_set_master(pdev); | |
1055 | sdhci_init(chip->hosts[i]); | |
1056 | ret = mmc_resume_host(chip->hosts[i]->mmc); | |
1057 | if (ret) | |
1058 | return ret; | |
1059 | } | |
1060 | ||
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | #else /* CONFIG_PM */ | |
1065 | ||
1066 | #define sdhci_suspend NULL | |
1067 | #define sdhci_resume NULL | |
1068 | ||
1069 | #endif /* CONFIG_PM */ | |
1070 | ||
1071 | /*****************************************************************************\ | |
1072 | * * | |
1073 | * Device probing/removal * | |
1074 | * * | |
1075 | \*****************************************************************************/ | |
1076 | ||
1077 | static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) | |
1078 | { | |
1079 | int ret; | |
4a965505 | 1080 | unsigned int version; |
d129bceb PO |
1081 | struct sdhci_chip *chip; |
1082 | struct mmc_host *mmc; | |
1083 | struct sdhci_host *host; | |
1084 | ||
1085 | u8 first_bar; | |
1086 | unsigned int caps; | |
1087 | ||
1088 | chip = pci_get_drvdata(pdev); | |
1089 | BUG_ON(!chip); | |
1090 | ||
1091 | ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar); | |
1092 | if (ret) | |
1093 | return ret; | |
1094 | ||
1095 | first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK; | |
1096 | ||
1097 | if (first_bar > 5) { | |
1098 | printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n"); | |
1099 | return -ENODEV; | |
1100 | } | |
1101 | ||
1102 | if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) { | |
1103 | printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n"); | |
1104 | return -ENODEV; | |
1105 | } | |
1106 | ||
1107 | if (pci_resource_len(pdev, first_bar + slot) != 0x100) { | |
1108 | printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n"); | |
1109 | return -ENODEV; | |
1110 | } | |
1111 | ||
67435274 PO |
1112 | if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) { |
1113 | printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n"); | |
1114 | return -ENODEV; | |
1115 | } | |
1116 | ||
1117 | if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) { | |
1118 | printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n"); | |
1119 | return -ENODEV; | |
1120 | } | |
1121 | ||
d129bceb PO |
1122 | mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev); |
1123 | if (!mmc) | |
1124 | return -ENOMEM; | |
1125 | ||
1126 | host = mmc_priv(mmc); | |
1127 | host->mmc = mmc; | |
1128 | ||
1129 | host->bar = first_bar + slot; | |
1130 | ||
1131 | host->addr = pci_resource_start(pdev, host->bar); | |
1132 | host->irq = pdev->irq; | |
1133 | ||
1134 | DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq); | |
1135 | ||
1136 | snprintf(host->slot_descr, 20, "sdhci:slot%d", slot); | |
1137 | ||
1138 | ret = pci_request_region(pdev, host->bar, host->slot_descr); | |
1139 | if (ret) | |
1140 | goto free; | |
1141 | ||
1142 | host->ioaddr = ioremap_nocache(host->addr, | |
1143 | pci_resource_len(pdev, host->bar)); | |
1144 | if (!host->ioaddr) { | |
1145 | ret = -ENOMEM; | |
1146 | goto release; | |
1147 | } | |
1148 | ||
d96649ed PO |
1149 | sdhci_reset(host, SDHCI_RESET_ALL); |
1150 | ||
4a965505 PO |
1151 | version = readw(host->ioaddr + SDHCI_HOST_VERSION); |
1152 | version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT; | |
1153 | if (version != 0) { | |
1154 | printk(KERN_ERR "%s: Unknown controller version (%d). " | |
1155 | "Cowardly refusing to continue.\n", host->slot_descr, | |
1156 | version); | |
1157 | ret = -ENODEV; | |
1158 | goto unmap; | |
1159 | } | |
1160 | ||
d129bceb PO |
1161 | caps = readl(host->ioaddr + SDHCI_CAPABILITIES); |
1162 | ||
67435274 PO |
1163 | if (debug_nodma) |
1164 | DBG("DMA forced off\n"); | |
1165 | else if (debug_forcedma) { | |
1166 | DBG("DMA forced on\n"); | |
1167 | host->flags |= SDHCI_USE_DMA; | |
1168 | } else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) | |
1169 | DBG("Controller doesn't have DMA interface\n"); | |
1170 | else if (!(caps & SDHCI_CAN_DO_DMA)) | |
1171 | DBG("Controller doesn't have DMA capability\n"); | |
1172 | else | |
d129bceb PO |
1173 | host->flags |= SDHCI_USE_DMA; |
1174 | ||
1175 | if (host->flags & SDHCI_USE_DMA) { | |
1176 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { | |
1177 | printk(KERN_WARNING "%s: No suitable DMA available. " | |
1178 | "Falling back to PIO.\n", host->slot_descr); | |
1179 | host->flags &= ~SDHCI_USE_DMA; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | if (host->flags & SDHCI_USE_DMA) | |
1184 | pci_set_master(pdev); | |
1185 | else /* XXX: Hack to get MMC layer to avoid highmem */ | |
1186 | pdev->dma_mask = 0; | |
1187 | ||
8ef1a143 PO |
1188 | host->max_clk = |
1189 | (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT; | |
1190 | if (host->max_clk == 0) { | |
1191 | printk(KERN_ERR "%s: Hardware doesn't specify base clock " | |
1192 | "frequency.\n", host->slot_descr); | |
1193 | ret = -ENODEV; | |
1194 | goto unmap; | |
1195 | } | |
d129bceb | 1196 | host->max_clk *= 1000000; |
1c8cde92 PO |
1197 | |
1198 | host->timeout_clk = | |
1199 | (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT; | |
1200 | if (host->timeout_clk == 0) { | |
1201 | printk(KERN_ERR "%s: Hardware doesn't specify timeout clock " | |
1202 | "frequency.\n", host->slot_descr); | |
1203 | ret = -ENODEV; | |
1204 | goto unmap; | |
1205 | } | |
1206 | if (caps & SDHCI_TIMEOUT_CLK_UNIT) | |
1207 | host->timeout_clk *= 1000; | |
d129bceb | 1208 | |
1d676e02 PO |
1209 | host->max_block = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT; |
1210 | if (host->max_block >= 3) { | |
1211 | printk(KERN_ERR "%s: Invalid maximum block size.\n", | |
1212 | host->slot_descr); | |
1213 | ret = -ENODEV; | |
1214 | goto unmap; | |
1215 | } | |
1216 | host->max_block = 512 << host->max_block; | |
1217 | ||
d129bceb PO |
1218 | /* |
1219 | * Set host parameters. | |
1220 | */ | |
1221 | mmc->ops = &sdhci_ops; | |
1222 | mmc->f_min = host->max_clk / 256; | |
1223 | mmc->f_max = host->max_clk; | |
d129bceb PO |
1224 | mmc->caps = MMC_CAP_4_BIT_DATA; |
1225 | ||
146ad66e PO |
1226 | mmc->ocr_avail = 0; |
1227 | if (caps & SDHCI_CAN_VDD_330) | |
1228 | mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34; | |
1229 | else if (caps & SDHCI_CAN_VDD_300) | |
1230 | mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31; | |
1231 | else if (caps & SDHCI_CAN_VDD_180) | |
1232 | mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19; | |
1233 | ||
1234 | if (mmc->ocr_avail == 0) { | |
1235 | printk(KERN_ERR "%s: Hardware doesn't report any " | |
1236 | "support voltages.\n", host->slot_descr); | |
1237 | ret = -ENODEV; | |
1238 | goto unmap; | |
1239 | } | |
1240 | ||
d129bceb PO |
1241 | spin_lock_init(&host->lock); |
1242 | ||
1243 | /* | |
1244 | * Maximum number of segments. Hardware cannot do scatter lists. | |
1245 | */ | |
1246 | if (host->flags & SDHCI_USE_DMA) | |
1247 | mmc->max_hw_segs = 1; | |
1248 | else | |
1249 | mmc->max_hw_segs = 16; | |
1250 | mmc->max_phys_segs = 16; | |
1251 | ||
1252 | /* | |
bab76961 PO |
1253 | * Maximum number of sectors in one transfer. Limited by DMA boundary |
1254 | * size (512KiB), which means (512 KiB/512=) 1024 entries. | |
d129bceb | 1255 | */ |
bab76961 | 1256 | mmc->max_sectors = 1024; |
d129bceb PO |
1257 | |
1258 | /* | |
1259 | * Maximum segment size. Could be one segment with the maximum number | |
1260 | * of sectors. | |
1261 | */ | |
1262 | mmc->max_seg_size = mmc->max_sectors * 512; | |
1263 | ||
1264 | /* | |
1265 | * Init tasklets. | |
1266 | */ | |
1267 | tasklet_init(&host->card_tasklet, | |
1268 | sdhci_tasklet_card, (unsigned long)host); | |
1269 | tasklet_init(&host->finish_tasklet, | |
1270 | sdhci_tasklet_finish, (unsigned long)host); | |
1271 | ||
e474c66b | 1272 | setup_timer(&host->timer, sdhci_timeout_timer, (long)host); |
d129bceb PO |
1273 | |
1274 | ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ, | |
1275 | host->slot_descr, host); | |
1276 | if (ret) | |
8ef1a143 | 1277 | goto untasklet; |
d129bceb PO |
1278 | |
1279 | sdhci_init(host); | |
1280 | ||
1281 | #ifdef CONFIG_MMC_DEBUG | |
1282 | sdhci_dumpregs(host); | |
1283 | #endif | |
1284 | ||
1285 | host->chip = chip; | |
1286 | chip->hosts[slot] = host; | |
1287 | ||
1288 | mmc_add_host(mmc); | |
1289 | ||
1290 | printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc), | |
1291 | host->addr, host->irq, | |
1292 | (host->flags & SDHCI_USE_DMA)?"DMA":"PIO"); | |
1293 | ||
1294 | return 0; | |
1295 | ||
8ef1a143 | 1296 | untasklet: |
d129bceb PO |
1297 | tasklet_kill(&host->card_tasklet); |
1298 | tasklet_kill(&host->finish_tasklet); | |
8ef1a143 | 1299 | unmap: |
d129bceb PO |
1300 | iounmap(host->ioaddr); |
1301 | release: | |
1302 | pci_release_region(pdev, host->bar); | |
1303 | free: | |
1304 | mmc_free_host(mmc); | |
1305 | ||
1306 | return ret; | |
1307 | } | |
1308 | ||
1309 | static void sdhci_remove_slot(struct pci_dev *pdev, int slot) | |
1310 | { | |
1311 | struct sdhci_chip *chip; | |
1312 | struct mmc_host *mmc; | |
1313 | struct sdhci_host *host; | |
1314 | ||
1315 | chip = pci_get_drvdata(pdev); | |
1316 | host = chip->hosts[slot]; | |
1317 | mmc = host->mmc; | |
1318 | ||
1319 | chip->hosts[slot] = NULL; | |
1320 | ||
1321 | mmc_remove_host(mmc); | |
1322 | ||
1323 | sdhci_reset(host, SDHCI_RESET_ALL); | |
1324 | ||
1325 | free_irq(host->irq, host); | |
1326 | ||
1327 | del_timer_sync(&host->timer); | |
1328 | ||
1329 | tasklet_kill(&host->card_tasklet); | |
1330 | tasklet_kill(&host->finish_tasklet); | |
1331 | ||
1332 | iounmap(host->ioaddr); | |
1333 | ||
1334 | pci_release_region(pdev, host->bar); | |
1335 | ||
1336 | mmc_free_host(mmc); | |
1337 | } | |
1338 | ||
1339 | static int __devinit sdhci_probe(struct pci_dev *pdev, | |
1340 | const struct pci_device_id *ent) | |
1341 | { | |
1342 | int ret, i; | |
51f82bc0 | 1343 | u8 slots, rev; |
d129bceb PO |
1344 | struct sdhci_chip *chip; |
1345 | ||
1346 | BUG_ON(pdev == NULL); | |
1347 | BUG_ON(ent == NULL); | |
1348 | ||
51f82bc0 PO |
1349 | pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev); |
1350 | ||
1351 | printk(KERN_INFO DRIVER_NAME | |
1352 | ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n", | |
1353 | pci_name(pdev), (int)pdev->vendor, (int)pdev->device, | |
1354 | (int)rev); | |
d129bceb PO |
1355 | |
1356 | ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots); | |
1357 | if (ret) | |
1358 | return ret; | |
1359 | ||
1360 | slots = PCI_SLOT_INFO_SLOTS(slots) + 1; | |
1361 | DBG("found %d slot(s)\n", slots); | |
1362 | if (slots == 0) | |
1363 | return -ENODEV; | |
1364 | ||
1365 | ret = pci_enable_device(pdev); | |
1366 | if (ret) | |
1367 | return ret; | |
1368 | ||
1369 | chip = kzalloc(sizeof(struct sdhci_chip) + | |
1370 | sizeof(struct sdhci_host*) * slots, GFP_KERNEL); | |
1371 | if (!chip) { | |
1372 | ret = -ENOMEM; | |
1373 | goto err; | |
1374 | } | |
1375 | ||
1376 | chip->pdev = pdev; | |
df673b22 PO |
1377 | chip->quirks = ent->driver_data; |
1378 | ||
1379 | if (debug_quirks) | |
1380 | chip->quirks = debug_quirks; | |
d129bceb PO |
1381 | |
1382 | chip->num_slots = slots; | |
1383 | pci_set_drvdata(pdev, chip); | |
1384 | ||
1385 | for (i = 0;i < slots;i++) { | |
1386 | ret = sdhci_probe_slot(pdev, i); | |
1387 | if (ret) { | |
1388 | for (i--;i >= 0;i--) | |
1389 | sdhci_remove_slot(pdev, i); | |
1390 | goto free; | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | return 0; | |
1395 | ||
1396 | free: | |
1397 | pci_set_drvdata(pdev, NULL); | |
1398 | kfree(chip); | |
1399 | ||
1400 | err: | |
1401 | pci_disable_device(pdev); | |
1402 | return ret; | |
1403 | } | |
1404 | ||
1405 | static void __devexit sdhci_remove(struct pci_dev *pdev) | |
1406 | { | |
1407 | int i; | |
1408 | struct sdhci_chip *chip; | |
1409 | ||
1410 | chip = pci_get_drvdata(pdev); | |
1411 | ||
1412 | if (chip) { | |
1413 | for (i = 0;i < chip->num_slots;i++) | |
1414 | sdhci_remove_slot(pdev, i); | |
1415 | ||
1416 | pci_set_drvdata(pdev, NULL); | |
1417 | ||
1418 | kfree(chip); | |
1419 | } | |
1420 | ||
1421 | pci_disable_device(pdev); | |
1422 | } | |
1423 | ||
1424 | static struct pci_driver sdhci_driver = { | |
1425 | .name = DRIVER_NAME, | |
1426 | .id_table = pci_ids, | |
1427 | .probe = sdhci_probe, | |
1428 | .remove = __devexit_p(sdhci_remove), | |
1429 | .suspend = sdhci_suspend, | |
1430 | .resume = sdhci_resume, | |
1431 | }; | |
1432 | ||
1433 | /*****************************************************************************\ | |
1434 | * * | |
1435 | * Driver init/exit * | |
1436 | * * | |
1437 | \*****************************************************************************/ | |
1438 | ||
1439 | static int __init sdhci_drv_init(void) | |
1440 | { | |
1441 | printk(KERN_INFO DRIVER_NAME | |
1442 | ": Secure Digital Host Controller Interface driver, " | |
1443 | DRIVER_VERSION "\n"); | |
1444 | printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); | |
1445 | ||
1446 | return pci_register_driver(&sdhci_driver); | |
1447 | } | |
1448 | ||
1449 | static void __exit sdhci_drv_exit(void) | |
1450 | { | |
1451 | DBG("Exiting\n"); | |
1452 | ||
1453 | pci_unregister_driver(&sdhci_driver); | |
1454 | } | |
1455 | ||
1456 | module_init(sdhci_drv_init); | |
1457 | module_exit(sdhci_drv_exit); | |
1458 | ||
67435274 PO |
1459 | module_param(debug_nodma, uint, 0444); |
1460 | module_param(debug_forcedma, uint, 0444); | |
df673b22 | 1461 | module_param(debug_quirks, uint, 0444); |
67435274 | 1462 | |
d129bceb PO |
1463 | MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>"); |
1464 | MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver"); | |
1465 | MODULE_VERSION(DRIVER_VERSION); | |
1466 | MODULE_LICENSE("GPL"); | |
67435274 PO |
1467 | |
1468 | MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)"); | |
1469 | MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)"); | |
df673b22 | 1470 | MODULE_PARM_DESC(debug_quirks, "Force certain quirks."); |