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Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-mmc
[linux-2.6.git] / drivers / mmc / sdhci.c
blob74134699cceeff096d3d6c7e857fca8ddcf29660
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
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"
24 #define DRIVER_VERSION "0.12"
25
26 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
27
28 #define DBG(f, x...) \
29 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
30
31 static unsigned int debug_nodma = 0;
32 static unsigned int debug_forcedma = 0;
33 static unsigned int debug_quirks = 0;
34
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 {
95 unsigned long timeout;
96
97 writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
98
99 if (mask & SDHCI_RESET_ALL)
100 host->clock = 0;
101
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);
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
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 |
129 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
130 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
131
132 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
133 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
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
190 static void sdhci_read_block_pio(struct sdhci_host *host)
191 {
192 int blksize, chunk_remain;
193 u32 data;
194 char *buffer;
195 int size;
196
197 DBG("PIO reading\n");
198
199 blksize = host->data->blksz;
200 chunk_remain = 0;
201 data = 0;
202
203 buffer = sdhci_kmap_sg(host) + host->offset;
204
205 while (blksize) {
206 if (chunk_remain == 0) {
207 data = readl(host->ioaddr + SDHCI_BUFFER);
208 chunk_remain = min(blksize, 4);
209 }
210
211 size = min(host->size, host->remain);
212 size = min(size, chunk_remain);
213
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 }
225
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);
233 }
234 }
235
236 sdhci_kunmap_sg(host);
237 }
238
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;
245
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;
254
255 while (blksize) {
256 size = min(host->size, host->remain);
257 size = min(size, chunk_remain);
258
259 chunk_remain -= size;
260 blksize -= size;
261 host->offset += size;
262 host->remain -= size;
263 host->size -= size;
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 }
275
276 if (host->remain == 0) {
277 sdhci_kunmap_sg(host);
278 if (sdhci_next_sg(host) == 0) {
279 BUG_ON(blksize != 0);
280 return;
281 }
282 buffer = sdhci_kmap_sg(host);
283 }
284 }
285
286 sdhci_kunmap_sg(host);
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 }
314
315 DBG("PIO transfer complete.\n");
316 }
317
318 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
319 {
320 u8 count;
321 unsigned target_timeout, current_timeout;
322
323 WARN_ON(host->data);
324
325 if (data == NULL)
326 return;
327
328 DBG("blksz %04x blks %04x flags %08x\n",
329 data->blksz, data->blocks, data->flags);
330 DBG("tsac %d ms nsac %d clk\n",
331 data->timeout_ns / 1000000, data->timeout_clks);
332
333 /* Sanity checks */
334 BUG_ON(data->blksz * data->blocks > 524288);
335 BUG_ON(data->blksz > host->max_block);
336 BUG_ON(data->blocks > 65535);
337
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
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 {
378 host->size = data->blksz * data->blocks;
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 }
386
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);
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);
412 }
413
414 static void sdhci_finish_data(struct sdhci_host *host)
415 {
416 struct mmc_data *data;
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);
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);
436 data->bytes_xfered = data->blksz * (data->blocks - blocks);
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;
472 u32 mask;
473 unsigned long timeout;
474
475 WARN_ON(host->cmd);
476
477 DBG("Sending cmd (%x)\n", cmd->opcode);
478
479 /* Wait max 10 ms */
480 timeout = 10;
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) {
492 if (timeout == 0) {
493 printk(KERN_ERR "%s: Controller never released "
494 "inhibit bit(s). Please report this to "
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 }
501 timeout--;
502 mdelay(1);
503 }
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
513 sdhci_set_transfer_mode(host, cmd->data);
514
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
570 if (host->cmd->data)
571 host->data = host->cmd->data;
572 else
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;
582 unsigned long timeout;
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 */
603 timeout = 10;
604 while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
605 & SDHCI_CLOCK_INT_STABLE)) {
606 if (timeout == 0) {
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 }
613 timeout--;
614 mdelay(1);
615 }
616
617 clk |= SDHCI_CLOCK_CARD_EN;
618 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
619
620 out:
621 host->clock = clock;
622 }
623
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
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
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);
710 sdhci_init(host);
711 }
712
713 sdhci_set_clock(host, ios->clock);
714
715 if (ios->power_mode == MMC_POWER_OFF)
716 sdhci_set_power(host, -1);
717 else
718 sdhci_set_power(host, ios->vdd);
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 {
925 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
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
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);
953 tasklet_schedule(&host->card_tasklet);
954 }
955
956 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
957
958 if (intmask & SDHCI_INT_CMD_MASK) {
959 writel(intmask & SDHCI_INT_CMD_MASK,
960 host->ioaddr + SDHCI_INT_STATUS);
961 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
962 }
963
964 if (intmask & SDHCI_INT_DATA_MASK) {
965 writel(intmask & SDHCI_INT_DATA_MASK,
966 host->ioaddr + SDHCI_INT_STATUS);
967 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
968 }
969
970 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
971
972 if (intmask & SDHCI_INT_BUS_POWER) {
973 printk(KERN_ERR "%s: Card is consuming too much power!\n",
974 mmc_hostname(host->mmc));
975 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
976 }
977
978 intmask &= SDHCI_INT_BUS_POWER;
979
980 if (intmask) {
981 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
982 "report this to " BUGMAIL ".\n",
983 mmc_hostname(host->mmc), intmask);
984 sdhci_dumpregs(host);
985
986 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
987 }
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;
1080 unsigned int version;
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
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
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
1149 sdhci_reset(host, SDHCI_RESET_ALL);
1150
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
1161 caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1162
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
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
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 }
1196 host->max_clk *= 1000000;
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;
1208
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
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;
1224 mmc->caps = MMC_CAP_4_BIT_DATA;
1225
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
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 /*
1253 * Maximum number of sectors in one transfer. Limited by DMA boundary
1254 * size (512KiB), which means (512 KiB/512=) 1024 entries.
1255 */
1256 mmc->max_sectors = 1024;
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
1272 setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1273
1274 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1275 host->slot_descr, host);
1276 if (ret)
1277 goto untasklet;
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
1296 untasklet:
1297 tasklet_kill(&host->card_tasklet);
1298 tasklet_kill(&host->finish_tasklet);
1299 unmap:
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;
1343 u8 slots, rev;
1344 struct sdhci_chip *chip;
1345
1346 BUG_ON(pdev == NULL);
1347 BUG_ON(ent == NULL);
1348
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);
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;
1377 chip->quirks = ent->driver_data;
1378
1379 if (debug_quirks)
1380 chip->quirks = debug_quirks;
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
1459 module_param(debug_nodma, uint, 0444);
1460 module_param(debug_forcedma, uint, 0444);
1461 module_param(debug_quirks, uint, 0444);
1462
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");
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)");
1470 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
Linus' kernel tree