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[PATCH] use cycle_t instead of u64 in struct time_interpolator
[linux-2.6/kvm.git] / drivers / mmc / sdhci.c
blob4bf1fea5e2c405acccfa1b7ebbc069a2d323a787
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 as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12 #include <linux/delay.h>
13 #include <linux/highmem.h>
14 #include <linux/pci.h>
15 #include <linux/dma-mapping.h>
16
17 #include <linux/mmc/host.h>
18 #include <linux/mmc/protocol.h>
19
20 #include <asm/scatterlist.h>
21
22 #include "sdhci.h"
23
24 #define DRIVER_NAME "sdhci"
25 #define DRIVER_VERSION "0.12"
26
27 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
28
29 #define DBG(f, x...) \
30 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
31
32 static unsigned int debug_nodma = 0;
33 static unsigned int debug_forcedma = 0;
34 static unsigned int debug_quirks = 0;
35
36 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
37 #define SDHCI_QUIRK_FORCE_DMA (1<<1)
38 /* Controller doesn't like some resets when there is no card inserted. */
39 #define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
40 #define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
41
42 static const struct pci_device_id pci_ids[] __devinitdata = {
43 {
44 .vendor = PCI_VENDOR_ID_RICOH,
45 .device = PCI_DEVICE_ID_RICOH_R5C822,
46 .subvendor = PCI_VENDOR_ID_IBM,
47 .subdevice = PCI_ANY_ID,
48 .driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
49 SDHCI_QUIRK_FORCE_DMA,
50 },
51
52 {
53 .vendor = PCI_VENDOR_ID_RICOH,
54 .device = PCI_DEVICE_ID_RICOH_R5C822,
55 .subvendor = PCI_ANY_ID,
56 .subdevice = PCI_ANY_ID,
57 .driver_data = SDHCI_QUIRK_FORCE_DMA |
58 SDHCI_QUIRK_NO_CARD_NO_RESET,
59 },
60
61 {
62 .vendor = PCI_VENDOR_ID_TI,
63 .device = PCI_DEVICE_ID_TI_XX21_XX11_SD,
64 .subvendor = PCI_ANY_ID,
65 .subdevice = PCI_ANY_ID,
66 .driver_data = SDHCI_QUIRK_FORCE_DMA,
67 },
68
69 {
70 .vendor = PCI_VENDOR_ID_ENE,
71 .device = PCI_DEVICE_ID_ENE_CB712_SD,
72 .subvendor = PCI_ANY_ID,
73 .subdevice = PCI_ANY_ID,
74 .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
75 },
76
77 { /* Generic SD host controller */
78 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
79 },
80
81 { /* end: all zeroes */ },
82 };
83
84 MODULE_DEVICE_TABLE(pci, pci_ids);
85
86 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
87 static void sdhci_finish_data(struct sdhci_host *);
88
89 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
90 static void sdhci_finish_command(struct sdhci_host *);
91
92 static void sdhci_dumpregs(struct sdhci_host *host)
93 {
94 printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
95
96 printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
97 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
98 readw(host->ioaddr + SDHCI_HOST_VERSION));
99 printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
100 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
101 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
102 printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
103 readl(host->ioaddr + SDHCI_ARGUMENT),
104 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
105 printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
106 readl(host->ioaddr + SDHCI_PRESENT_STATE),
107 readb(host->ioaddr + SDHCI_HOST_CONTROL));
108 printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
109 readb(host->ioaddr + SDHCI_POWER_CONTROL),
110 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
111 printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
112 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
113 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
114 printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
115 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
116 readl(host->ioaddr + SDHCI_INT_STATUS));
117 printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
118 readl(host->ioaddr + SDHCI_INT_ENABLE),
119 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
120 printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
121 readw(host->ioaddr + SDHCI_ACMD12_ERR),
122 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
123 printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
124 readl(host->ioaddr + SDHCI_CAPABILITIES),
125 readl(host->ioaddr + SDHCI_MAX_CURRENT));
126
127 printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
128 }
129
130 /*****************************************************************************\
131 * *
132 * Low level functions *
133 * *
134 \*****************************************************************************/
135
136 static void sdhci_reset(struct sdhci_host *host, u8 mask)
137 {
138 unsigned long timeout;
139
140 if (host->chip->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
141 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
142 SDHCI_CARD_PRESENT))
143 return;
144 }
145
146 writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
147
148 if (mask & SDHCI_RESET_ALL)
149 host->clock = 0;
150
151 /* Wait max 100 ms */
152 timeout = 100;
153
154 /* hw clears the bit when it's done */
155 while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
156 if (timeout == 0) {
157 printk(KERN_ERR "%s: Reset 0x%x never completed. "
158 "Please report this to " BUGMAIL ".\n",
159 mmc_hostname(host->mmc), (int)mask);
160 sdhci_dumpregs(host);
161 return;
162 }
163 timeout--;
164 mdelay(1);
165 }
166 }
167
168 static void sdhci_init(struct sdhci_host *host)
169 {
170 u32 intmask;
171
172 sdhci_reset(host, SDHCI_RESET_ALL);
173
174 intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
175 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
176 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
177 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
178 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
179 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
180
181 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
182 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
183 }
184
185 static void sdhci_activate_led(struct sdhci_host *host)
186 {
187 u8 ctrl;
188
189 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
190 ctrl |= SDHCI_CTRL_LED;
191 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
192 }
193
194 static void sdhci_deactivate_led(struct sdhci_host *host)
195 {
196 u8 ctrl;
197
198 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
199 ctrl &= ~SDHCI_CTRL_LED;
200 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
201 }
202
203 /*****************************************************************************\
204 * *
205 * Core functions *
206 * *
207 \*****************************************************************************/
208
209 static inline char* sdhci_sg_to_buffer(struct sdhci_host* host)
210 {
211 return page_address(host->cur_sg->page) + host->cur_sg->offset;
212 }
213
214 static inline int sdhci_next_sg(struct sdhci_host* host)
215 {
216 /*
217 * Skip to next SG entry.
218 */
219 host->cur_sg++;
220 host->num_sg--;
221
222 /*
223 * Any entries left?
224 */
225 if (host->num_sg > 0) {
226 host->offset = 0;
227 host->remain = host->cur_sg->length;
228 }
229
230 return host->num_sg;
231 }
232
233 static void sdhci_read_block_pio(struct sdhci_host *host)
234 {
235 int blksize, chunk_remain;
236 u32 data;
237 char *buffer;
238 int size;
239
240 DBG("PIO reading\n");
241
242 blksize = host->data->blksz;
243 chunk_remain = 0;
244 data = 0;
245
246 buffer = sdhci_sg_to_buffer(host) + host->offset;
247
248 while (blksize) {
249 if (chunk_remain == 0) {
250 data = readl(host->ioaddr + SDHCI_BUFFER);
251 chunk_remain = min(blksize, 4);
252 }
253
254 size = min(host->size, host->remain);
255 size = min(size, chunk_remain);
256
257 chunk_remain -= size;
258 blksize -= size;
259 host->offset += size;
260 host->remain -= size;
261 host->size -= size;
262 while (size) {
263 *buffer = data & 0xFF;
264 buffer++;
265 data >>= 8;
266 size--;
267 }
268
269 if (host->remain == 0) {
270 if (sdhci_next_sg(host) == 0) {
271 BUG_ON(blksize != 0);
272 return;
273 }
274 buffer = sdhci_sg_to_buffer(host);
275 }
276 }
277 }
278
279 static void sdhci_write_block_pio(struct sdhci_host *host)
280 {
281 int blksize, chunk_remain;
282 u32 data;
283 char *buffer;
284 int bytes, size;
285
286 DBG("PIO writing\n");
287
288 blksize = host->data->blksz;
289 chunk_remain = 4;
290 data = 0;
291
292 bytes = 0;
293 buffer = sdhci_sg_to_buffer(host) + host->offset;
294
295 while (blksize) {
296 size = min(host->size, host->remain);
297 size = min(size, chunk_remain);
298
299 chunk_remain -= size;
300 blksize -= size;
301 host->offset += size;
302 host->remain -= size;
303 host->size -= size;
304 while (size) {
305 data >>= 8;
306 data |= (u32)*buffer << 24;
307 buffer++;
308 size--;
309 }
310
311 if (chunk_remain == 0) {
312 writel(data, host->ioaddr + SDHCI_BUFFER);
313 chunk_remain = min(blksize, 4);
314 }
315
316 if (host->remain == 0) {
317 if (sdhci_next_sg(host) == 0) {
318 BUG_ON(blksize != 0);
319 return;
320 }
321 buffer = sdhci_sg_to_buffer(host);
322 }
323 }
324 }
325
326 static void sdhci_transfer_pio(struct sdhci_host *host)
327 {
328 u32 mask;
329
330 BUG_ON(!host->data);
331
332 if (host->size == 0)
333 return;
334
335 if (host->data->flags & MMC_DATA_READ)
336 mask = SDHCI_DATA_AVAILABLE;
337 else
338 mask = SDHCI_SPACE_AVAILABLE;
339
340 while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
341 if (host->data->flags & MMC_DATA_READ)
342 sdhci_read_block_pio(host);
343 else
344 sdhci_write_block_pio(host);
345
346 if (host->size == 0)
347 break;
348
349 BUG_ON(host->num_sg == 0);
350 }
351
352 DBG("PIO transfer complete.\n");
353 }
354
355 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
356 {
357 u8 count;
358 unsigned target_timeout, current_timeout;
359
360 WARN_ON(host->data);
361
362 if (data == NULL)
363 return;
364
365 DBG("blksz %04x blks %04x flags %08x\n",
366 data->blksz, data->blocks, data->flags);
367 DBG("tsac %d ms nsac %d clk\n",
368 data->timeout_ns / 1000000, data->timeout_clks);
369
370 /* Sanity checks */
371 BUG_ON(data->blksz * data->blocks > 524288);
372 BUG_ON(data->blksz > host->mmc->max_blk_size);
373 BUG_ON(data->blocks > 65535);
374
375 /* timeout in us */
376 target_timeout = data->timeout_ns / 1000 +
377 data->timeout_clks / host->clock;
378
379 /*
380 * Figure out needed cycles.
381 * We do this in steps in order to fit inside a 32 bit int.
382 * The first step is the minimum timeout, which will have a
383 * minimum resolution of 6 bits:
384 * (1) 2^13*1000 > 2^22,
385 * (2) host->timeout_clk < 2^16
386 * =>
387 * (1) / (2) > 2^6
388 */
389 count = 0;
390 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
391 while (current_timeout < target_timeout) {
392 count++;
393 current_timeout <<= 1;
394 if (count >= 0xF)
395 break;
396 }
397
398 if (count >= 0xF) {
399 printk(KERN_WARNING "%s: Too large timeout requested!\n",
400 mmc_hostname(host->mmc));
401 count = 0xE;
402 }
403
404 writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
405
406 if (host->flags & SDHCI_USE_DMA) {
407 int count;
408
409 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
410 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
411 BUG_ON(count != 1);
412
413 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
414 } else {
415 host->size = data->blksz * data->blocks;
416
417 host->cur_sg = data->sg;
418 host->num_sg = data->sg_len;
419
420 host->offset = 0;
421 host->remain = host->cur_sg->length;
422 }
423
424 /* We do not handle DMA boundaries, so set it to max (512 KiB) */
425 writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
426 host->ioaddr + SDHCI_BLOCK_SIZE);
427 writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
428 }
429
430 static void sdhci_set_transfer_mode(struct sdhci_host *host,
431 struct mmc_data *data)
432 {
433 u16 mode;
434
435 WARN_ON(host->data);
436
437 if (data == NULL)
438 return;
439
440 mode = SDHCI_TRNS_BLK_CNT_EN;
441 if (data->blocks > 1)
442 mode |= SDHCI_TRNS_MULTI;
443 if (data->flags & MMC_DATA_READ)
444 mode |= SDHCI_TRNS_READ;
445 if (host->flags & SDHCI_USE_DMA)
446 mode |= SDHCI_TRNS_DMA;
447
448 writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
449 }
450
451 static void sdhci_finish_data(struct sdhci_host *host)
452 {
453 struct mmc_data *data;
454 u16 blocks;
455
456 BUG_ON(!host->data);
457
458 data = host->data;
459 host->data = NULL;
460
461 if (host->flags & SDHCI_USE_DMA) {
462 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
463 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
464 }
465
466 /*
467 * Controller doesn't count down when in single block mode.
468 */
469 if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
470 blocks = 0;
471 else
472 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
473 data->bytes_xfered = data->blksz * (data->blocks - blocks);
474
475 if ((data->error == MMC_ERR_NONE) && blocks) {
476 printk(KERN_ERR "%s: Controller signalled completion even "
477 "though there were blocks left. Please report this "
478 "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
479 data->error = MMC_ERR_FAILED;
480 } else if (host->size != 0) {
481 printk(KERN_ERR "%s: %d bytes were left untransferred. "
482 "Please report this to " BUGMAIL ".\n",
483 mmc_hostname(host->mmc), host->size);
484 data->error = MMC_ERR_FAILED;
485 }
486
487 DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
488
489 if (data->stop) {
490 /*
491 * The controller needs a reset of internal state machines
492 * upon error conditions.
493 */
494 if (data->error != MMC_ERR_NONE) {
495 sdhci_reset(host, SDHCI_RESET_CMD);
496 sdhci_reset(host, SDHCI_RESET_DATA);
497 }
498
499 sdhci_send_command(host, data->stop);
500 } else
501 tasklet_schedule(&host->finish_tasklet);
502 }
503
504 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
505 {
506 int flags;
507 u32 mask;
508 unsigned long timeout;
509
510 WARN_ON(host->cmd);
511
512 DBG("Sending cmd (%x)\n", cmd->opcode);
513
514 /* Wait max 10 ms */
515 timeout = 10;
516
517 mask = SDHCI_CMD_INHIBIT;
518 if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
519 mask |= SDHCI_DATA_INHIBIT;
520
521 /* We shouldn't wait for data inihibit for stop commands, even
522 though they might use busy signaling */
523 if (host->mrq->data && (cmd == host->mrq->data->stop))
524 mask &= ~SDHCI_DATA_INHIBIT;
525
526 while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
527 if (timeout == 0) {
528 printk(KERN_ERR "%s: Controller never released "
529 "inhibit bit(s). Please report this to "
530 BUGMAIL ".\n", mmc_hostname(host->mmc));
531 sdhci_dumpregs(host);
532 cmd->error = MMC_ERR_FAILED;
533 tasklet_schedule(&host->finish_tasklet);
534 return;
535 }
536 timeout--;
537 mdelay(1);
538 }
539
540 mod_timer(&host->timer, jiffies + 10 * HZ);
541
542 host->cmd = cmd;
543
544 sdhci_prepare_data(host, cmd->data);
545
546 writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
547
548 sdhci_set_transfer_mode(host, cmd->data);
549
550 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
551 printk(KERN_ERR "%s: Unsupported response type! "
552 "Please report this to " BUGMAIL ".\n",
553 mmc_hostname(host->mmc));
554 cmd->error = MMC_ERR_INVALID;
555 tasklet_schedule(&host->finish_tasklet);
556 return;
557 }
558
559 if (!(cmd->flags & MMC_RSP_PRESENT))
560 flags = SDHCI_CMD_RESP_NONE;
561 else if (cmd->flags & MMC_RSP_136)
562 flags = SDHCI_CMD_RESP_LONG;
563 else if (cmd->flags & MMC_RSP_BUSY)
564 flags = SDHCI_CMD_RESP_SHORT_BUSY;
565 else
566 flags = SDHCI_CMD_RESP_SHORT;
567
568 if (cmd->flags & MMC_RSP_CRC)
569 flags |= SDHCI_CMD_CRC;
570 if (cmd->flags & MMC_RSP_OPCODE)
571 flags |= SDHCI_CMD_INDEX;
572 if (cmd->data)
573 flags |= SDHCI_CMD_DATA;
574
575 writew(SDHCI_MAKE_CMD(cmd->opcode, flags),
576 host->ioaddr + SDHCI_COMMAND);
577 }
578
579 static void sdhci_finish_command(struct sdhci_host *host)
580 {
581 int i;
582
583 BUG_ON(host->cmd == NULL);
584
585 if (host->cmd->flags & MMC_RSP_PRESENT) {
586 if (host->cmd->flags & MMC_RSP_136) {
587 /* CRC is stripped so we need to do some shifting. */
588 for (i = 0;i < 4;i++) {
589 host->cmd->resp[i] = readl(host->ioaddr +
590 SDHCI_RESPONSE + (3-i)*4) << 8;
591 if (i != 3)
592 host->cmd->resp[i] |=
593 readb(host->ioaddr +
594 SDHCI_RESPONSE + (3-i)*4-1);
595 }
596 } else {
597 host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
598 }
599 }
600
601 host->cmd->error = MMC_ERR_NONE;
602
603 DBG("Ending cmd (%x)\n", host->cmd->opcode);
604
605 if (host->cmd->data)
606 host->data = host->cmd->data;
607 else
608 tasklet_schedule(&host->finish_tasklet);
609
610 host->cmd = NULL;
611 }
612
613 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
614 {
615 int div;
616 u8 ctrl;
617 u16 clk;
618 unsigned long timeout;
619
620 if (clock == host->clock)
621 return;
622
623 writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
624
625 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
626 if (clock > 25000000)
627 ctrl |= SDHCI_CTRL_HISPD;
628 else
629 ctrl &= ~SDHCI_CTRL_HISPD;
630 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
631
632 if (clock == 0)
633 goto out;
634
635 for (div = 1;div < 256;div *= 2) {
636 if ((host->max_clk / div) <= clock)
637 break;
638 }
639 div >>= 1;
640
641 clk = div << SDHCI_DIVIDER_SHIFT;
642 clk |= SDHCI_CLOCK_INT_EN;
643 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
644
645 /* Wait max 10 ms */
646 timeout = 10;
647 while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
648 & SDHCI_CLOCK_INT_STABLE)) {
649 if (timeout == 0) {
650 printk(KERN_ERR "%s: Internal clock never stabilised. "
651 "Please report this to " BUGMAIL ".\n",
652 mmc_hostname(host->mmc));
653 sdhci_dumpregs(host);
654 return;
655 }
656 timeout--;
657 mdelay(1);
658 }
659
660 clk |= SDHCI_CLOCK_CARD_EN;
661 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
662
663 out:
664 host->clock = clock;
665 }
666
667 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
668 {
669 u8 pwr;
670
671 if (host->power == power)
672 return;
673
674 if (power == (unsigned short)-1) {
675 writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
676 goto out;
677 }
678
679 /*
680 * Spec says that we should clear the power reg before setting
681 * a new value. Some controllers don't seem to like this though.
682 */
683 if (!(host->chip->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
684 writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
685
686 pwr = SDHCI_POWER_ON;
687
688 switch (power) {
689 case MMC_VDD_170:
690 case MMC_VDD_180:
691 case MMC_VDD_190:
692 pwr |= SDHCI_POWER_180;
693 break;
694 case MMC_VDD_290:
695 case MMC_VDD_300:
696 case MMC_VDD_310:
697 pwr |= SDHCI_POWER_300;
698 break;
699 case MMC_VDD_320:
700 case MMC_VDD_330:
701 case MMC_VDD_340:
702 pwr |= SDHCI_POWER_330;
703 break;
704 default:
705 BUG();
706 }
707
708 writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
709
710 out:
711 host->power = power;
712 }
713
714 /*****************************************************************************\
715 * *
716 * MMC callbacks *
717 * *
718 \*****************************************************************************/
719
720 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
721 {
722 struct sdhci_host *host;
723 unsigned long flags;
724
725 host = mmc_priv(mmc);
726
727 spin_lock_irqsave(&host->lock, flags);
728
729 WARN_ON(host->mrq != NULL);
730
731 sdhci_activate_led(host);
732
733 host->mrq = mrq;
734
735 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
736 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
737 tasklet_schedule(&host->finish_tasklet);
738 } else
739 sdhci_send_command(host, mrq->cmd);
740
741 mmiowb();
742 spin_unlock_irqrestore(&host->lock, flags);
743 }
744
745 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
746 {
747 struct sdhci_host *host;
748 unsigned long flags;
749 u8 ctrl;
750
751 host = mmc_priv(mmc);
752
753 spin_lock_irqsave(&host->lock, flags);
754
755 /*
756 * Reset the chip on each power off.
757 * Should clear out any weird states.
758 */
759 if (ios->power_mode == MMC_POWER_OFF) {
760 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
761 sdhci_init(host);
762 }
763
764 sdhci_set_clock(host, ios->clock);
765
766 if (ios->power_mode == MMC_POWER_OFF)
767 sdhci_set_power(host, -1);
768 else
769 sdhci_set_power(host, ios->vdd);
770
771 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
772 if (ios->bus_width == MMC_BUS_WIDTH_4)
773 ctrl |= SDHCI_CTRL_4BITBUS;
774 else
775 ctrl &= ~SDHCI_CTRL_4BITBUS;
776 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
777
778 mmiowb();
779 spin_unlock_irqrestore(&host->lock, flags);
780 }
781
782 static int sdhci_get_ro(struct mmc_host *mmc)
783 {
784 struct sdhci_host *host;
785 unsigned long flags;
786 int present;
787
788 host = mmc_priv(mmc);
789
790 spin_lock_irqsave(&host->lock, flags);
791
792 present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
793
794 spin_unlock_irqrestore(&host->lock, flags);
795
796 return !(present & SDHCI_WRITE_PROTECT);
797 }
798
799 static const struct mmc_host_ops sdhci_ops = {
800 .request = sdhci_request,
801 .set_ios = sdhci_set_ios,
802 .get_ro = sdhci_get_ro,
803 };
804
805 /*****************************************************************************\
806 * *
807 * Tasklets *
808 * *
809 \*****************************************************************************/
810
811 static void sdhci_tasklet_card(unsigned long param)
812 {
813 struct sdhci_host *host;
814 unsigned long flags;
815
816 host = (struct sdhci_host*)param;
817
818 spin_lock_irqsave(&host->lock, flags);
819
820 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
821 if (host->mrq) {
822 printk(KERN_ERR "%s: Card removed during transfer!\n",
823 mmc_hostname(host->mmc));
824 printk(KERN_ERR "%s: Resetting controller.\n",
825 mmc_hostname(host->mmc));
826
827 sdhci_reset(host, SDHCI_RESET_CMD);
828 sdhci_reset(host, SDHCI_RESET_DATA);
829
830 host->mrq->cmd->error = MMC_ERR_FAILED;
831 tasklet_schedule(&host->finish_tasklet);
832 }
833 }
834
835 spin_unlock_irqrestore(&host->lock, flags);
836
837 mmc_detect_change(host->mmc, msecs_to_jiffies(500));
838 }
839
840 static void sdhci_tasklet_finish(unsigned long param)
841 {
842 struct sdhci_host *host;
843 unsigned long flags;
844 struct mmc_request *mrq;
845
846 host = (struct sdhci_host*)param;
847
848 spin_lock_irqsave(&host->lock, flags);
849
850 del_timer(&host->timer);
851
852 mrq = host->mrq;
853
854 DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
855
856 /*
857 * The controller needs a reset of internal state machines
858 * upon error conditions.
859 */
860 if ((mrq->cmd->error != MMC_ERR_NONE) ||
861 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
862 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
863
864 /* Some controllers need this kick or reset won't work here */
865 if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
866 unsigned int clock;
867
868 /* This is to force an update */
869 clock = host->clock;
870 host->clock = 0;
871 sdhci_set_clock(host, clock);
872 }
873
874 /* Spec says we should do both at the same time, but Ricoh
875 controllers do not like that. */
876 sdhci_reset(host, SDHCI_RESET_CMD);
877 sdhci_reset(host, SDHCI_RESET_DATA);
878 }
879
880 host->mrq = NULL;
881 host->cmd = NULL;
882 host->data = NULL;
883
884 sdhci_deactivate_led(host);
885
886 mmiowb();
887 spin_unlock_irqrestore(&host->lock, flags);
888
889 mmc_request_done(host->mmc, mrq);
890 }
891
892 static void sdhci_timeout_timer(unsigned long data)
893 {
894 struct sdhci_host *host;
895 unsigned long flags;
896
897 host = (struct sdhci_host*)data;
898
899 spin_lock_irqsave(&host->lock, flags);
900
901 if (host->mrq) {
902 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
903 "Please report this to " BUGMAIL ".\n",
904 mmc_hostname(host->mmc));
905 sdhci_dumpregs(host);
906
907 if (host->data) {
908 host->data->error = MMC_ERR_TIMEOUT;
909 sdhci_finish_data(host);
910 } else {
911 if (host->cmd)
912 host->cmd->error = MMC_ERR_TIMEOUT;
913 else
914 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
915
916 tasklet_schedule(&host->finish_tasklet);
917 }
918 }
919
920 mmiowb();
921 spin_unlock_irqrestore(&host->lock, flags);
922 }
923
924 /*****************************************************************************\
925 * *
926 * Interrupt handling *
927 * *
928 \*****************************************************************************/
929
930 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
931 {
932 BUG_ON(intmask == 0);
933
934 if (!host->cmd) {
935 printk(KERN_ERR "%s: Got command interrupt even though no "
936 "command operation was in progress.\n",
937 mmc_hostname(host->mmc));
938 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
939 mmc_hostname(host->mmc));
940 sdhci_dumpregs(host);
941 return;
942 }
943
944 if (intmask & SDHCI_INT_RESPONSE)
945 sdhci_finish_command(host);
946 else {
947 if (intmask & SDHCI_INT_TIMEOUT)
948 host->cmd->error = MMC_ERR_TIMEOUT;
949 else if (intmask & SDHCI_INT_CRC)
950 host->cmd->error = MMC_ERR_BADCRC;
951 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
952 host->cmd->error = MMC_ERR_FAILED;
953 else
954 host->cmd->error = MMC_ERR_INVALID;
955
956 tasklet_schedule(&host->finish_tasklet);
957 }
958 }
959
960 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
961 {
962 BUG_ON(intmask == 0);
963
964 if (!host->data) {
965 /*
966 * A data end interrupt is sent together with the response
967 * for the stop command.
968 */
969 if (intmask & SDHCI_INT_DATA_END)
970 return;
971
972 printk(KERN_ERR "%s: Got data interrupt even though no "
973 "data operation was in progress.\n",
974 mmc_hostname(host->mmc));
975 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
976 mmc_hostname(host->mmc));
977 sdhci_dumpregs(host);
978
979 return;
980 }
981
982 if (intmask & SDHCI_INT_DATA_TIMEOUT)
983 host->data->error = MMC_ERR_TIMEOUT;
984 else if (intmask & SDHCI_INT_DATA_CRC)
985 host->data->error = MMC_ERR_BADCRC;
986 else if (intmask & SDHCI_INT_DATA_END_BIT)
987 host->data->error = MMC_ERR_FAILED;
988
989 if (host->data->error != MMC_ERR_NONE)
990 sdhci_finish_data(host);
991 else {
992 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
993 sdhci_transfer_pio(host);
994
995 if (intmask & SDHCI_INT_DATA_END)
996 sdhci_finish_data(host);
997 }
998 }
999
1000 static irqreturn_t sdhci_irq(int irq, void *dev_id)
1001 {
1002 irqreturn_t result;
1003 struct sdhci_host* host = dev_id;
1004 u32 intmask;
1005
1006 spin_lock(&host->lock);
1007
1008 intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
1009
1010 if (!intmask) {
1011 result = IRQ_NONE;
1012 goto out;
1013 }
1014
1015 DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
1016
1017 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
1018 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
1019 host->ioaddr + SDHCI_INT_STATUS);
1020 tasklet_schedule(&host->card_tasklet);
1021 }
1022
1023 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
1024
1025 if (intmask & SDHCI_INT_CMD_MASK) {
1026 writel(intmask & SDHCI_INT_CMD_MASK,
1027 host->ioaddr + SDHCI_INT_STATUS);
1028 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
1029 }
1030
1031 if (intmask & SDHCI_INT_DATA_MASK) {
1032 writel(intmask & SDHCI_INT_DATA_MASK,
1033 host->ioaddr + SDHCI_INT_STATUS);
1034 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
1035 }
1036
1037 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1038
1039 if (intmask & SDHCI_INT_BUS_POWER) {
1040 printk(KERN_ERR "%s: Card is consuming too much power!\n",
1041 mmc_hostname(host->mmc));
1042 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
1043 }
1044
1045 intmask &= SDHCI_INT_BUS_POWER;
1046
1047 if (intmask) {
1048 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
1049 "report this to " BUGMAIL ".\n",
1050 mmc_hostname(host->mmc), intmask);
1051 sdhci_dumpregs(host);
1052
1053 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
1054 }
1055
1056 result = IRQ_HANDLED;
1057
1058 mmiowb();
1059 out:
1060 spin_unlock(&host->lock);
1061
1062 return result;
1063 }
1064
1065 /*****************************************************************************\
1066 * *
1067 * Suspend/resume *
1068 * *
1069 \*****************************************************************************/
1070
1071 #ifdef CONFIG_PM
1072
1073 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
1074 {
1075 struct sdhci_chip *chip;
1076 int i, ret;
1077
1078 chip = pci_get_drvdata(pdev);
1079 if (!chip)
1080 return 0;
1081
1082 DBG("Suspending...\n");
1083
1084 for (i = 0;i < chip->num_slots;i++) {
1085 if (!chip->hosts[i])
1086 continue;
1087 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1088 if (ret) {
1089 for (i--;i >= 0;i--)
1090 mmc_resume_host(chip->hosts[i]->mmc);
1091 return ret;
1092 }
1093 }
1094
1095 pci_save_state(pdev);
1096 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1097 pci_disable_device(pdev);
1098 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1099
1100 return 0;
1101 }
1102
1103 static int sdhci_resume (struct pci_dev *pdev)
1104 {
1105 struct sdhci_chip *chip;
1106 int i, ret;
1107
1108 chip = pci_get_drvdata(pdev);
1109 if (!chip)
1110 return 0;
1111
1112 DBG("Resuming...\n");
1113
1114 pci_set_power_state(pdev, PCI_D0);
1115 pci_restore_state(pdev);
1116 ret = pci_enable_device(pdev);
1117 if (ret)
1118 return ret;
1119
1120 for (i = 0;i < chip->num_slots;i++) {
1121 if (!chip->hosts[i])
1122 continue;
1123 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1124 pci_set_master(pdev);
1125 sdhci_init(chip->hosts[i]);
1126 mmiowb();
1127 ret = mmc_resume_host(chip->hosts[i]->mmc);
1128 if (ret)
1129 return ret;
1130 }
1131
1132 return 0;
1133 }
1134
1135 #else /* CONFIG_PM */
1136
1137 #define sdhci_suspend NULL
1138 #define sdhci_resume NULL
1139
1140 #endif /* CONFIG_PM */
1141
1142 /*****************************************************************************\
1143 * *
1144 * Device probing/removal *
1145 * *
1146 \*****************************************************************************/
1147
1148 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1149 {
1150 int ret;
1151 unsigned int version;
1152 struct sdhci_chip *chip;
1153 struct mmc_host *mmc;
1154 struct sdhci_host *host;
1155
1156 u8 first_bar;
1157 unsigned int caps;
1158
1159 chip = pci_get_drvdata(pdev);
1160 BUG_ON(!chip);
1161
1162 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1163 if (ret)
1164 return ret;
1165
1166 first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1167
1168 if (first_bar > 5) {
1169 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1170 return -ENODEV;
1171 }
1172
1173 if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1174 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1175 return -ENODEV;
1176 }
1177
1178 if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1179 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. "
1180 "You may experience problems.\n");
1181 }
1182
1183 if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1184 printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n");
1185 return -ENODEV;
1186 }
1187
1188 if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1189 printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n");
1190 return -ENODEV;
1191 }
1192
1193 mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1194 if (!mmc)
1195 return -ENOMEM;
1196
1197 host = mmc_priv(mmc);
1198 host->mmc = mmc;
1199
1200 host->chip = chip;
1201 chip->hosts[slot] = host;
1202
1203 host->bar = first_bar + slot;
1204
1205 host->addr = pci_resource_start(pdev, host->bar);
1206 host->irq = pdev->irq;
1207
1208 DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1209
1210 snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1211
1212 ret = pci_request_region(pdev, host->bar, host->slot_descr);
1213 if (ret)
1214 goto free;
1215
1216 host->ioaddr = ioremap_nocache(host->addr,
1217 pci_resource_len(pdev, host->bar));
1218 if (!host->ioaddr) {
1219 ret = -ENOMEM;
1220 goto release;
1221 }
1222
1223 sdhci_reset(host, SDHCI_RESET_ALL);
1224
1225 version = readw(host->ioaddr + SDHCI_HOST_VERSION);
1226 version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
1227 if (version != 0) {
1228 printk(KERN_ERR "%s: Unknown controller version (%d). "
1229 "You may experience problems.\n", host->slot_descr,
1230 version);
1231 }
1232
1233 caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1234
1235 if (debug_nodma)
1236 DBG("DMA forced off\n");
1237 else if (debug_forcedma) {
1238 DBG("DMA forced on\n");
1239 host->flags |= SDHCI_USE_DMA;
1240 } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
1241 host->flags |= SDHCI_USE_DMA;
1242 else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
1243 DBG("Controller doesn't have DMA interface\n");
1244 else if (!(caps & SDHCI_CAN_DO_DMA))
1245 DBG("Controller doesn't have DMA capability\n");
1246 else
1247 host->flags |= SDHCI_USE_DMA;
1248
1249 if (host->flags & SDHCI_USE_DMA) {
1250 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1251 printk(KERN_WARNING "%s: No suitable DMA available. "
1252 "Falling back to PIO.\n", host->slot_descr);
1253 host->flags &= ~SDHCI_USE_DMA;
1254 }
1255 }
1256
1257 if (host->flags & SDHCI_USE_DMA)
1258 pci_set_master(pdev);
1259 else /* XXX: Hack to get MMC layer to avoid highmem */
1260 pdev->dma_mask = 0;
1261
1262 host->max_clk =
1263 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1264 if (host->max_clk == 0) {
1265 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1266 "frequency.\n", host->slot_descr);
1267 ret = -ENODEV;
1268 goto unmap;
1269 }
1270 host->max_clk *= 1000000;
1271
1272 host->timeout_clk =
1273 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1274 if (host->timeout_clk == 0) {
1275 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1276 "frequency.\n", host->slot_descr);
1277 ret = -ENODEV;
1278 goto unmap;
1279 }
1280 if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1281 host->timeout_clk *= 1000;
1282
1283 /*
1284 * Set host parameters.
1285 */
1286 mmc->ops = &sdhci_ops;
1287 mmc->f_min = host->max_clk / 256;
1288 mmc->f_max = host->max_clk;
1289 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
1290
1291 mmc->ocr_avail = 0;
1292 if (caps & SDHCI_CAN_VDD_330)
1293 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1294 if (caps & SDHCI_CAN_VDD_300)
1295 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1296 if (caps & SDHCI_CAN_VDD_180)
1297 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1298
1299 if ((host->max_clk > 25000000) && !(caps & SDHCI_CAN_DO_HISPD)) {
1300 printk(KERN_ERR "%s: Controller reports > 25 MHz base clock,"
1301 " but no high speed support.\n",
1302 host->slot_descr);
1303 mmc->f_max = 25000000;
1304 }
1305
1306 if (mmc->ocr_avail == 0) {
1307 printk(KERN_ERR "%s: Hardware doesn't report any "
1308 "support voltages.\n", host->slot_descr);
1309 ret = -ENODEV;
1310 goto unmap;
1311 }
1312
1313 spin_lock_init(&host->lock);
1314
1315 /*
1316 * Maximum number of segments. Hardware cannot do scatter lists.
1317 */
1318 if (host->flags & SDHCI_USE_DMA)
1319 mmc->max_hw_segs = 1;
1320 else
1321 mmc->max_hw_segs = 16;
1322 mmc->max_phys_segs = 16;
1323
1324 /*
1325 * Maximum number of sectors in one transfer. Limited by DMA boundary
1326 * size (512KiB).
1327 */
1328 mmc->max_req_size = 524288;
1329
1330 /*
1331 * Maximum segment size. Could be one segment with the maximum number
1332 * of bytes.
1333 */
1334 mmc->max_seg_size = mmc->max_req_size;
1335
1336 /*
1337 * Maximum block size. This varies from controller to controller and
1338 * is specified in the capabilities register.
1339 */
1340 mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1341 if (mmc->max_blk_size >= 3) {
1342 printk(KERN_ERR "%s: Invalid maximum block size.\n",
1343 host->slot_descr);
1344 ret = -ENODEV;
1345 goto unmap;
1346 }
1347 mmc->max_blk_size = 512 << mmc->max_blk_size;
1348
1349 /*
1350 * Maximum block count.
1351 */
1352 mmc->max_blk_count = 65535;
1353
1354 /*
1355 * Init tasklets.
1356 */
1357 tasklet_init(&host->card_tasklet,
1358 sdhci_tasklet_card, (unsigned long)host);
1359 tasklet_init(&host->finish_tasklet,
1360 sdhci_tasklet_finish, (unsigned long)host);
1361
1362 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
1363
1364 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1365 host->slot_descr, host);
1366 if (ret)
1367 goto untasklet;
1368
1369 sdhci_init(host);
1370
1371 #ifdef CONFIG_MMC_DEBUG
1372 sdhci_dumpregs(host);
1373 #endif
1374
1375 mmiowb();
1376
1377 mmc_add_host(mmc);
1378
1379 printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1380 host->addr, host->irq,
1381 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1382
1383 return 0;
1384
1385 untasklet:
1386 tasklet_kill(&host->card_tasklet);
1387 tasklet_kill(&host->finish_tasklet);
1388 unmap:
1389 iounmap(host->ioaddr);
1390 release:
1391 pci_release_region(pdev, host->bar);
1392 free:
1393 mmc_free_host(mmc);
1394
1395 return ret;
1396 }
1397
1398 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1399 {
1400 struct sdhci_chip *chip;
1401 struct mmc_host *mmc;
1402 struct sdhci_host *host;
1403
1404 chip = pci_get_drvdata(pdev);
1405 host = chip->hosts[slot];
1406 mmc = host->mmc;
1407
1408 chip->hosts[slot] = NULL;
1409
1410 mmc_remove_host(mmc);
1411
1412 sdhci_reset(host, SDHCI_RESET_ALL);
1413
1414 free_irq(host->irq, host);
1415
1416 del_timer_sync(&host->timer);
1417
1418 tasklet_kill(&host->card_tasklet);
1419 tasklet_kill(&host->finish_tasklet);
1420
1421 iounmap(host->ioaddr);
1422
1423 pci_release_region(pdev, host->bar);
1424
1425 mmc_free_host(mmc);
1426 }
1427
1428 static int __devinit sdhci_probe(struct pci_dev *pdev,
1429 const struct pci_device_id *ent)
1430 {
1431 int ret, i;
1432 u8 slots, rev;
1433 struct sdhci_chip *chip;
1434
1435 BUG_ON(pdev == NULL);
1436 BUG_ON(ent == NULL);
1437
1438 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1439
1440 printk(KERN_INFO DRIVER_NAME
1441 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1442 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1443 (int)rev);
1444
1445 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1446 if (ret)
1447 return ret;
1448
1449 slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1450 DBG("found %d slot(s)\n", slots);
1451 if (slots == 0)
1452 return -ENODEV;
1453
1454 ret = pci_enable_device(pdev);
1455 if (ret)
1456 return ret;
1457
1458 chip = kzalloc(sizeof(struct sdhci_chip) +
1459 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1460 if (!chip) {
1461 ret = -ENOMEM;
1462 goto err;
1463 }
1464
1465 chip->pdev = pdev;
1466 chip->quirks = ent->driver_data;
1467
1468 if (debug_quirks)
1469 chip->quirks = debug_quirks;
1470
1471 chip->num_slots = slots;
1472 pci_set_drvdata(pdev, chip);
1473
1474 for (i = 0;i < slots;i++) {
1475 ret = sdhci_probe_slot(pdev, i);
1476 if (ret) {
1477 for (i--;i >= 0;i--)
1478 sdhci_remove_slot(pdev, i);
1479 goto free;
1480 }
1481 }
1482
1483 return 0;
1484
1485 free:
1486 pci_set_drvdata(pdev, NULL);
1487 kfree(chip);
1488
1489 err:
1490 pci_disable_device(pdev);
1491 return ret;
1492 }
1493
1494 static void __devexit sdhci_remove(struct pci_dev *pdev)
1495 {
1496 int i;
1497 struct sdhci_chip *chip;
1498
1499 chip = pci_get_drvdata(pdev);
1500
1501 if (chip) {
1502 for (i = 0;i < chip->num_slots;i++)
1503 sdhci_remove_slot(pdev, i);
1504
1505 pci_set_drvdata(pdev, NULL);
1506
1507 kfree(chip);
1508 }
1509
1510 pci_disable_device(pdev);
1511 }
1512
1513 static struct pci_driver sdhci_driver = {
1514 .name = DRIVER_NAME,
1515 .id_table = pci_ids,
1516 .probe = sdhci_probe,
1517 .remove = __devexit_p(sdhci_remove),
1518 .suspend = sdhci_suspend,
1519 .resume = sdhci_resume,
1520 };
1521
1522 /*****************************************************************************\
1523 * *
1524 * Driver init/exit *
1525 * *
1526 \*****************************************************************************/
1527
1528 static int __init sdhci_drv_init(void)
1529 {
1530 printk(KERN_INFO DRIVER_NAME
1531 ": Secure Digital Host Controller Interface driver, "
1532 DRIVER_VERSION "\n");
1533 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1534
1535 return pci_register_driver(&sdhci_driver);
1536 }
1537
1538 static void __exit sdhci_drv_exit(void)
1539 {
1540 DBG("Exiting\n");
1541
1542 pci_unregister_driver(&sdhci_driver);
1543 }
1544
1545 module_init(sdhci_drv_init);
1546 module_exit(sdhci_drv_exit);
1547
1548 module_param(debug_nodma, uint, 0444);
1549 module_param(debug_forcedma, uint, 0444);
1550 module_param(debug_quirks, uint, 0444);
1551
1552 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1553 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1554 MODULE_VERSION(DRIVER_VERSION);
1555 MODULE_LICENSE("GPL");
1556
1557 MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
1558 MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
1559 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
kernel-based virtual machine