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sdhci: remove DMA capability check from controller's PCI Class reg
[linux-2.6/mini2440.git] / drivers / mmc / host / sdhci.c
blob866528c4ac10d4f51696f5bae37d52eb1faf0b73
1 /*
2 * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver
3 *
4 * Copyright (C) 2005-2007 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
19 #include <asm/scatterlist.h>
20
21 #include "sdhci.h"
22
23 #define DRIVER_NAME "sdhci"
24
25 #define DBG(f, x...) \
26 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
27
28 static unsigned int debug_nodma = 0;
29 static unsigned int debug_forcedma = 0;
30 static unsigned int debug_quirks = 0;
31
32 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
33 #define SDHCI_QUIRK_FORCE_DMA (1<<1)
34 /* Controller doesn't like some resets when there is no card inserted. */
35 #define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
36 #define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
37 #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
38
39 static const struct pci_device_id pci_ids[] __devinitdata = {
40 {
41 .vendor = PCI_VENDOR_ID_RICOH,
42 .device = PCI_DEVICE_ID_RICOH_R5C822,
43 .subvendor = PCI_VENDOR_ID_IBM,
44 .subdevice = PCI_ANY_ID,
45 .driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
46 SDHCI_QUIRK_FORCE_DMA,
47 },
48
49 {
50 .vendor = PCI_VENDOR_ID_RICOH,
51 .device = PCI_DEVICE_ID_RICOH_R5C822,
52 .subvendor = PCI_ANY_ID,
53 .subdevice = PCI_ANY_ID,
54 .driver_data = SDHCI_QUIRK_FORCE_DMA |
55 SDHCI_QUIRK_NO_CARD_NO_RESET,
56 },
57
58 {
59 .vendor = PCI_VENDOR_ID_TI,
60 .device = PCI_DEVICE_ID_TI_XX21_XX11_SD,
61 .subvendor = PCI_ANY_ID,
62 .subdevice = PCI_ANY_ID,
63 .driver_data = SDHCI_QUIRK_FORCE_DMA,
64 },
65
66 {
67 .vendor = PCI_VENDOR_ID_ENE,
68 .device = PCI_DEVICE_ID_ENE_CB712_SD,
69 .subvendor = PCI_ANY_ID,
70 .subdevice = PCI_ANY_ID,
71 .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
72 },
73
74 {
75 .vendor = PCI_VENDOR_ID_ENE,
76 .device = PCI_DEVICE_ID_ENE_CB712_SD_2,
77 .subvendor = PCI_ANY_ID,
78 .subdevice = PCI_ANY_ID,
79 .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
80 },
81
82 {
83 .vendor = PCI_VENDOR_ID_ENE,
84 .device = PCI_DEVICE_ID_ENE_CB714_SD,
85 .subvendor = PCI_ANY_ID,
86 .subdevice = PCI_ANY_ID,
87 .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
88 SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
89 },
90
91 {
92 .vendor = PCI_VENDOR_ID_ENE,
93 .device = PCI_DEVICE_ID_ENE_CB714_SD_2,
94 .subvendor = PCI_ANY_ID,
95 .subdevice = PCI_ANY_ID,
96 .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
97 SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
98 },
99
100 { /* Generic SD host controller */
101 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
102 },
103
104 { /* end: all zeroes */ },
105 };
106
107 MODULE_DEVICE_TABLE(pci, pci_ids);
108
109 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
110 static void sdhci_finish_data(struct sdhci_host *);
111
112 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
113 static void sdhci_finish_command(struct sdhci_host *);
114
115 static void sdhci_dumpregs(struct sdhci_host *host)
116 {
117 printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
118
119 printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
120 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
121 readw(host->ioaddr + SDHCI_HOST_VERSION));
122 printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
123 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
124 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
125 printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
126 readl(host->ioaddr + SDHCI_ARGUMENT),
127 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
128 printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
129 readl(host->ioaddr + SDHCI_PRESENT_STATE),
130 readb(host->ioaddr + SDHCI_HOST_CONTROL));
131 printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
132 readb(host->ioaddr + SDHCI_POWER_CONTROL),
133 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
134 printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
135 readb(host->ioaddr + SDHCI_WAKE_UP_CONTROL),
136 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
137 printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
138 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
139 readl(host->ioaddr + SDHCI_INT_STATUS));
140 printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
141 readl(host->ioaddr + SDHCI_INT_ENABLE),
142 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
143 printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
144 readw(host->ioaddr + SDHCI_ACMD12_ERR),
145 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
146 printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
147 readl(host->ioaddr + SDHCI_CAPABILITIES),
148 readl(host->ioaddr + SDHCI_MAX_CURRENT));
149
150 printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
151 }
152
153 /*****************************************************************************\
154 * *
155 * Low level functions *
156 * *
157 \*****************************************************************************/
158
159 static void sdhci_reset(struct sdhci_host *host, u8 mask)
160 {
161 unsigned long timeout;
162
163 if (host->chip->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
164 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
165 SDHCI_CARD_PRESENT))
166 return;
167 }
168
169 writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
170
171 if (mask & SDHCI_RESET_ALL)
172 host->clock = 0;
173
174 /* Wait max 100 ms */
175 timeout = 100;
176
177 /* hw clears the bit when it's done */
178 while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
179 if (timeout == 0) {
180 printk(KERN_ERR "%s: Reset 0x%x never completed.\n",
181 mmc_hostname(host->mmc), (int)mask);
182 sdhci_dumpregs(host);
183 return;
184 }
185 timeout--;
186 mdelay(1);
187 }
188 }
189
190 static void sdhci_init(struct sdhci_host *host)
191 {
192 u32 intmask;
193
194 sdhci_reset(host, SDHCI_RESET_ALL);
195
196 intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
197 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
198 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
199 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
200 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
201 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
202
203 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
204 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
205 }
206
207 static void sdhci_activate_led(struct sdhci_host *host)
208 {
209 u8 ctrl;
210
211 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
212 ctrl |= SDHCI_CTRL_LED;
213 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
214 }
215
216 static void sdhci_deactivate_led(struct sdhci_host *host)
217 {
218 u8 ctrl;
219
220 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
221 ctrl &= ~SDHCI_CTRL_LED;
222 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
223 }
224
225 /*****************************************************************************\
226 * *
227 * Core functions *
228 * *
229 \*****************************************************************************/
230
231 static inline char* sdhci_sg_to_buffer(struct sdhci_host* host)
232 {
233 return page_address(host->cur_sg->page) + host->cur_sg->offset;
234 }
235
236 static inline int sdhci_next_sg(struct sdhci_host* host)
237 {
238 /*
239 * Skip to next SG entry.
240 */
241 host->cur_sg++;
242 host->num_sg--;
243
244 /*
245 * Any entries left?
246 */
247 if (host->num_sg > 0) {
248 host->offset = 0;
249 host->remain = host->cur_sg->length;
250 }
251
252 return host->num_sg;
253 }
254
255 static void sdhci_read_block_pio(struct sdhci_host *host)
256 {
257 int blksize, chunk_remain;
258 u32 data;
259 char *buffer;
260 int size;
261
262 DBG("PIO reading\n");
263
264 blksize = host->data->blksz;
265 chunk_remain = 0;
266 data = 0;
267
268 buffer = sdhci_sg_to_buffer(host) + host->offset;
269
270 while (blksize) {
271 if (chunk_remain == 0) {
272 data = readl(host->ioaddr + SDHCI_BUFFER);
273 chunk_remain = min(blksize, 4);
274 }
275
276 size = min(host->remain, chunk_remain);
277
278 chunk_remain -= size;
279 blksize -= size;
280 host->offset += size;
281 host->remain -= size;
282
283 while (size) {
284 *buffer = data & 0xFF;
285 buffer++;
286 data >>= 8;
287 size--;
288 }
289
290 if (host->remain == 0) {
291 if (sdhci_next_sg(host) == 0) {
292 BUG_ON(blksize != 0);
293 return;
294 }
295 buffer = sdhci_sg_to_buffer(host);
296 }
297 }
298 }
299
300 static void sdhci_write_block_pio(struct sdhci_host *host)
301 {
302 int blksize, chunk_remain;
303 u32 data;
304 char *buffer;
305 int bytes, size;
306
307 DBG("PIO writing\n");
308
309 blksize = host->data->blksz;
310 chunk_remain = 4;
311 data = 0;
312
313 bytes = 0;
314 buffer = sdhci_sg_to_buffer(host) + host->offset;
315
316 while (blksize) {
317 size = min(host->remain, chunk_remain);
318
319 chunk_remain -= size;
320 blksize -= size;
321 host->offset += size;
322 host->remain -= size;
323
324 while (size) {
325 data >>= 8;
326 data |= (u32)*buffer << 24;
327 buffer++;
328 size--;
329 }
330
331 if (chunk_remain == 0) {
332 writel(data, host->ioaddr + SDHCI_BUFFER);
333 chunk_remain = min(blksize, 4);
334 }
335
336 if (host->remain == 0) {
337 if (sdhci_next_sg(host) == 0) {
338 BUG_ON(blksize != 0);
339 return;
340 }
341 buffer = sdhci_sg_to_buffer(host);
342 }
343 }
344 }
345
346 static void sdhci_transfer_pio(struct sdhci_host *host)
347 {
348 u32 mask;
349
350 BUG_ON(!host->data);
351
352 if (host->num_sg == 0)
353 return;
354
355 if (host->data->flags & MMC_DATA_READ)
356 mask = SDHCI_DATA_AVAILABLE;
357 else
358 mask = SDHCI_SPACE_AVAILABLE;
359
360 while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
361 if (host->data->flags & MMC_DATA_READ)
362 sdhci_read_block_pio(host);
363 else
364 sdhci_write_block_pio(host);
365
366 if (host->num_sg == 0)
367 break;
368 }
369
370 DBG("PIO transfer complete.\n");
371 }
372
373 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
374 {
375 u8 count;
376 unsigned target_timeout, current_timeout;
377
378 WARN_ON(host->data);
379
380 if (data == NULL)
381 return;
382
383 /* Sanity checks */
384 BUG_ON(data->blksz * data->blocks > 524288);
385 BUG_ON(data->blksz > host->mmc->max_blk_size);
386 BUG_ON(data->blocks > 65535);
387
388 host->data = data;
389 host->data_early = 0;
390
391 /* timeout in us */
392 target_timeout = data->timeout_ns / 1000 +
393 data->timeout_clks / host->clock;
394
395 /*
396 * Figure out needed cycles.
397 * We do this in steps in order to fit inside a 32 bit int.
398 * The first step is the minimum timeout, which will have a
399 * minimum resolution of 6 bits:
400 * (1) 2^13*1000 > 2^22,
401 * (2) host->timeout_clk < 2^16
402 * =>
403 * (1) / (2) > 2^6
404 */
405 count = 0;
406 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
407 while (current_timeout < target_timeout) {
408 count++;
409 current_timeout <<= 1;
410 if (count >= 0xF)
411 break;
412 }
413
414 if (count >= 0xF) {
415 printk(KERN_WARNING "%s: Too large timeout requested!\n",
416 mmc_hostname(host->mmc));
417 count = 0xE;
418 }
419
420 writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
421
422 if (host->flags & SDHCI_USE_DMA) {
423 int count;
424
425 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
426 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
427 BUG_ON(count != 1);
428
429 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
430 } else {
431 host->cur_sg = data->sg;
432 host->num_sg = data->sg_len;
433
434 host->offset = 0;
435 host->remain = host->cur_sg->length;
436 }
437
438 /* We do not handle DMA boundaries, so set it to max (512 KiB) */
439 writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
440 host->ioaddr + SDHCI_BLOCK_SIZE);
441 writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
442 }
443
444 static void sdhci_set_transfer_mode(struct sdhci_host *host,
445 struct mmc_data *data)
446 {
447 u16 mode;
448
449 if (data == NULL)
450 return;
451
452 WARN_ON(!host->data);
453
454 mode = SDHCI_TRNS_BLK_CNT_EN;
455 if (data->blocks > 1)
456 mode |= SDHCI_TRNS_MULTI;
457 if (data->flags & MMC_DATA_READ)
458 mode |= SDHCI_TRNS_READ;
459 if (host->flags & SDHCI_USE_DMA)
460 mode |= SDHCI_TRNS_DMA;
461
462 writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
463 }
464
465 static void sdhci_finish_data(struct sdhci_host *host)
466 {
467 struct mmc_data *data;
468 u16 blocks;
469
470 BUG_ON(!host->data);
471
472 data = host->data;
473 host->data = NULL;
474
475 if (host->flags & SDHCI_USE_DMA) {
476 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
477 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
478 }
479
480 /*
481 * Controller doesn't count down when in single block mode.
482 */
483 if (data->blocks == 1)
484 blocks = (data->error == 0) ? 0 : 1;
485 else
486 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
487 data->bytes_xfered = data->blksz * (data->blocks - blocks);
488
489 if (!data->error && blocks) {
490 printk(KERN_ERR "%s: Controller signalled completion even "
491 "though there were blocks left.\n",
492 mmc_hostname(host->mmc));
493 data->error = -EIO;
494 }
495
496 if (data->stop) {
497 /*
498 * The controller needs a reset of internal state machines
499 * upon error conditions.
500 */
501 if (data->error) {
502 sdhci_reset(host, SDHCI_RESET_CMD);
503 sdhci_reset(host, SDHCI_RESET_DATA);
504 }
505
506 sdhci_send_command(host, data->stop);
507 } else
508 tasklet_schedule(&host->finish_tasklet);
509 }
510
511 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
512 {
513 int flags;
514 u32 mask;
515 unsigned long timeout;
516
517 WARN_ON(host->cmd);
518
519 /* Wait max 10 ms */
520 timeout = 10;
521
522 mask = SDHCI_CMD_INHIBIT;
523 if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
524 mask |= SDHCI_DATA_INHIBIT;
525
526 /* We shouldn't wait for data inihibit for stop commands, even
527 though they might use busy signaling */
528 if (host->mrq->data && (cmd == host->mrq->data->stop))
529 mask &= ~SDHCI_DATA_INHIBIT;
530
531 while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
532 if (timeout == 0) {
533 printk(KERN_ERR "%s: Controller never released "
534 "inhibit bit(s).\n", mmc_hostname(host->mmc));
535 sdhci_dumpregs(host);
536 cmd->error = -EIO;
537 tasklet_schedule(&host->finish_tasklet);
538 return;
539 }
540 timeout--;
541 mdelay(1);
542 }
543
544 mod_timer(&host->timer, jiffies + 10 * HZ);
545
546 host->cmd = cmd;
547
548 sdhci_prepare_data(host, cmd->data);
549
550 writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
551
552 sdhci_set_transfer_mode(host, cmd->data);
553
554 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
555 printk(KERN_ERR "%s: Unsupported response type!\n",
556 mmc_hostname(host->mmc));
557 cmd->error = -EINVAL;
558 tasklet_schedule(&host->finish_tasklet);
559 return;
560 }
561
562 if (!(cmd->flags & MMC_RSP_PRESENT))
563 flags = SDHCI_CMD_RESP_NONE;
564 else if (cmd->flags & MMC_RSP_136)
565 flags = SDHCI_CMD_RESP_LONG;
566 else if (cmd->flags & MMC_RSP_BUSY)
567 flags = SDHCI_CMD_RESP_SHORT_BUSY;
568 else
569 flags = SDHCI_CMD_RESP_SHORT;
570
571 if (cmd->flags & MMC_RSP_CRC)
572 flags |= SDHCI_CMD_CRC;
573 if (cmd->flags & MMC_RSP_OPCODE)
574 flags |= SDHCI_CMD_INDEX;
575 if (cmd->data)
576 flags |= SDHCI_CMD_DATA;
577
578 writew(SDHCI_MAKE_CMD(cmd->opcode, flags),
579 host->ioaddr + SDHCI_COMMAND);
580 }
581
582 static void sdhci_finish_command(struct sdhci_host *host)
583 {
584 int i;
585
586 BUG_ON(host->cmd == NULL);
587
588 if (host->cmd->flags & MMC_RSP_PRESENT) {
589 if (host->cmd->flags & MMC_RSP_136) {
590 /* CRC is stripped so we need to do some shifting. */
591 for (i = 0;i < 4;i++) {
592 host->cmd->resp[i] = readl(host->ioaddr +
593 SDHCI_RESPONSE + (3-i)*4) << 8;
594 if (i != 3)
595 host->cmd->resp[i] |=
596 readb(host->ioaddr +
597 SDHCI_RESPONSE + (3-i)*4-1);
598 }
599 } else {
600 host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
601 }
602 }
603
604 host->cmd->error = 0;
605
606 if (host->data && host->data_early)
607 sdhci_finish_data(host);
608
609 if (!host->cmd->data)
610 tasklet_schedule(&host->finish_tasklet);
611
612 host->cmd = NULL;
613 }
614
615 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
616 {
617 int div;
618 u16 clk;
619 unsigned long timeout;
620
621 if (clock == host->clock)
622 return;
623
624 writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
625
626 if (clock == 0)
627 goto out;
628
629 for (div = 1;div < 256;div *= 2) {
630 if ((host->max_clk / div) <= clock)
631 break;
632 }
633 div >>= 1;
634
635 clk = div << SDHCI_DIVIDER_SHIFT;
636 clk |= SDHCI_CLOCK_INT_EN;
637 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
638
639 /* Wait max 10 ms */
640 timeout = 10;
641 while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
642 & SDHCI_CLOCK_INT_STABLE)) {
643 if (timeout == 0) {
644 printk(KERN_ERR "%s: Internal clock never "
645 "stabilised.\n", mmc_hostname(host->mmc));
646 sdhci_dumpregs(host);
647 return;
648 }
649 timeout--;
650 mdelay(1);
651 }
652
653 clk |= SDHCI_CLOCK_CARD_EN;
654 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
655
656 out:
657 host->clock = clock;
658 }
659
660 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
661 {
662 u8 pwr;
663
664 if (host->power == power)
665 return;
666
667 if (power == (unsigned short)-1) {
668 writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
669 goto out;
670 }
671
672 /*
673 * Spec says that we should clear the power reg before setting
674 * a new value. Some controllers don't seem to like this though.
675 */
676 if (!(host->chip->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
677 writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
678
679 pwr = SDHCI_POWER_ON;
680
681 switch (1 << power) {
682 case MMC_VDD_165_195:
683 pwr |= SDHCI_POWER_180;
684 break;
685 case MMC_VDD_29_30:
686 case MMC_VDD_30_31:
687 pwr |= SDHCI_POWER_300;
688 break;
689 case MMC_VDD_32_33:
690 case MMC_VDD_33_34:
691 pwr |= SDHCI_POWER_330;
692 break;
693 default:
694 BUG();
695 }
696
697 writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
698
699 out:
700 host->power = power;
701 }
702
703 /*****************************************************************************\
704 * *
705 * MMC callbacks *
706 * *
707 \*****************************************************************************/
708
709 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
710 {
711 struct sdhci_host *host;
712 unsigned long flags;
713
714 host = mmc_priv(mmc);
715
716 spin_lock_irqsave(&host->lock, flags);
717
718 WARN_ON(host->mrq != NULL);
719
720 sdhci_activate_led(host);
721
722 host->mrq = mrq;
723
724 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
725 host->mrq->cmd->error = -ENOMEDIUM;
726 tasklet_schedule(&host->finish_tasklet);
727 } else
728 sdhci_send_command(host, mrq->cmd);
729
730 mmiowb();
731 spin_unlock_irqrestore(&host->lock, flags);
732 }
733
734 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
735 {
736 struct sdhci_host *host;
737 unsigned long flags;
738 u8 ctrl;
739
740 host = mmc_priv(mmc);
741
742 spin_lock_irqsave(&host->lock, flags);
743
744 /*
745 * Reset the chip on each power off.
746 * Should clear out any weird states.
747 */
748 if (ios->power_mode == MMC_POWER_OFF) {
749 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
750 sdhci_init(host);
751 }
752
753 sdhci_set_clock(host, ios->clock);
754
755 if (ios->power_mode == MMC_POWER_OFF)
756 sdhci_set_power(host, -1);
757 else
758 sdhci_set_power(host, ios->vdd);
759
760 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
761
762 if (ios->bus_width == MMC_BUS_WIDTH_4)
763 ctrl |= SDHCI_CTRL_4BITBUS;
764 else
765 ctrl &= ~SDHCI_CTRL_4BITBUS;
766
767 if (ios->timing == MMC_TIMING_SD_HS)
768 ctrl |= SDHCI_CTRL_HISPD;
769 else
770 ctrl &= ~SDHCI_CTRL_HISPD;
771
772 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
773
774 /*
775 * Some (ENE) controllers go apeshit on some ios operation,
776 * signalling timeout and CRC errors even on CMD0. Resetting
777 * it on each ios seems to solve the problem.
778 */
779 if(host->chip->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
780 sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
781
782 mmiowb();
783 spin_unlock_irqrestore(&host->lock, flags);
784 }
785
786 static int sdhci_get_ro(struct mmc_host *mmc)
787 {
788 struct sdhci_host *host;
789 unsigned long flags;
790 int present;
791
792 host = mmc_priv(mmc);
793
794 spin_lock_irqsave(&host->lock, flags);
795
796 present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
797
798 spin_unlock_irqrestore(&host->lock, flags);
799
800 return !(present & SDHCI_WRITE_PROTECT);
801 }
802
803 static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
804 {
805 struct sdhci_host *host;
806 unsigned long flags;
807 u32 ier;
808
809 host = mmc_priv(mmc);
810
811 spin_lock_irqsave(&host->lock, flags);
812
813 ier = readl(host->ioaddr + SDHCI_INT_ENABLE);
814
815 ier &= ~SDHCI_INT_CARD_INT;
816 if (enable)
817 ier |= SDHCI_INT_CARD_INT;
818
819 writel(ier, host->ioaddr + SDHCI_INT_ENABLE);
820 writel(ier, host->ioaddr + SDHCI_SIGNAL_ENABLE);
821
822 mmiowb();
823
824 spin_unlock_irqrestore(&host->lock, flags);
825 }
826
827 static const struct mmc_host_ops sdhci_ops = {
828 .request = sdhci_request,
829 .set_ios = sdhci_set_ios,
830 .get_ro = sdhci_get_ro,
831 .enable_sdio_irq = sdhci_enable_sdio_irq,
832 };
833
834 /*****************************************************************************\
835 * *
836 * Tasklets *
837 * *
838 \*****************************************************************************/
839
840 static void sdhci_tasklet_card(unsigned long param)
841 {
842 struct sdhci_host *host;
843 unsigned long flags;
844
845 host = (struct sdhci_host*)param;
846
847 spin_lock_irqsave(&host->lock, flags);
848
849 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
850 if (host->mrq) {
851 printk(KERN_ERR "%s: Card removed during transfer!\n",
852 mmc_hostname(host->mmc));
853 printk(KERN_ERR "%s: Resetting controller.\n",
854 mmc_hostname(host->mmc));
855
856 sdhci_reset(host, SDHCI_RESET_CMD);
857 sdhci_reset(host, SDHCI_RESET_DATA);
858
859 host->mrq->cmd->error = -ENOMEDIUM;
860 tasklet_schedule(&host->finish_tasklet);
861 }
862 }
863
864 spin_unlock_irqrestore(&host->lock, flags);
865
866 mmc_detect_change(host->mmc, msecs_to_jiffies(500));
867 }
868
869 static void sdhci_tasklet_finish(unsigned long param)
870 {
871 struct sdhci_host *host;
872 unsigned long flags;
873 struct mmc_request *mrq;
874
875 host = (struct sdhci_host*)param;
876
877 spin_lock_irqsave(&host->lock, flags);
878
879 del_timer(&host->timer);
880
881 mrq = host->mrq;
882
883 /*
884 * The controller needs a reset of internal state machines
885 * upon error conditions.
886 */
887 if (mrq->cmd->error ||
888 (mrq->data && (mrq->data->error ||
889 (mrq->data->stop && mrq->data->stop->error)))) {
890
891 /* Some controllers need this kick or reset won't work here */
892 if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
893 unsigned int clock;
894
895 /* This is to force an update */
896 clock = host->clock;
897 host->clock = 0;
898 sdhci_set_clock(host, clock);
899 }
900
901 /* Spec says we should do both at the same time, but Ricoh
902 controllers do not like that. */
903 sdhci_reset(host, SDHCI_RESET_CMD);
904 sdhci_reset(host, SDHCI_RESET_DATA);
905 }
906
907 host->mrq = NULL;
908 host->cmd = NULL;
909 host->data = NULL;
910
911 sdhci_deactivate_led(host);
912
913 mmiowb();
914 spin_unlock_irqrestore(&host->lock, flags);
915
916 mmc_request_done(host->mmc, mrq);
917 }
918
919 static void sdhci_timeout_timer(unsigned long data)
920 {
921 struct sdhci_host *host;
922 unsigned long flags;
923
924 host = (struct sdhci_host*)data;
925
926 spin_lock_irqsave(&host->lock, flags);
927
928 if (host->mrq) {
929 printk(KERN_ERR "%s: Timeout waiting for hardware "
930 "interrupt.\n", mmc_hostname(host->mmc));
931 sdhci_dumpregs(host);
932
933 if (host->data) {
934 host->data->error = -ETIMEDOUT;
935 sdhci_finish_data(host);
936 } else {
937 if (host->cmd)
938 host->cmd->error = -ETIMEDOUT;
939 else
940 host->mrq->cmd->error = -ETIMEDOUT;
941
942 tasklet_schedule(&host->finish_tasklet);
943 }
944 }
945
946 mmiowb();
947 spin_unlock_irqrestore(&host->lock, flags);
948 }
949
950 /*****************************************************************************\
951 * *
952 * Interrupt handling *
953 * *
954 \*****************************************************************************/
955
956 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
957 {
958 BUG_ON(intmask == 0);
959
960 if (!host->cmd) {
961 printk(KERN_ERR "%s: Got command interrupt 0x%08x even "
962 "though no command operation was in progress.\n",
963 mmc_hostname(host->mmc), (unsigned)intmask);
964 sdhci_dumpregs(host);
965 return;
966 }
967
968 if (intmask & SDHCI_INT_TIMEOUT)
969 host->cmd->error = -ETIMEDOUT;
970 else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT |
971 SDHCI_INT_INDEX))
972 host->cmd->error = -EILSEQ;
973
974 if (host->cmd->error)
975 tasklet_schedule(&host->finish_tasklet);
976 else if (intmask & SDHCI_INT_RESPONSE)
977 sdhci_finish_command(host);
978 }
979
980 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
981 {
982 BUG_ON(intmask == 0);
983
984 if (!host->data) {
985 /*
986 * A data end interrupt is sent together with the response
987 * for the stop command.
988 */
989 if (intmask & SDHCI_INT_DATA_END)
990 return;
991
992 printk(KERN_ERR "%s: Got data interrupt 0x%08x even "
993 "though no data operation was in progress.\n",
994 mmc_hostname(host->mmc), (unsigned)intmask);
995 sdhci_dumpregs(host);
996
997 return;
998 }
999
1000 if (intmask & SDHCI_INT_DATA_TIMEOUT)
1001 host->data->error = -ETIMEDOUT;
1002 else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
1003 host->data->error = -EILSEQ;
1004
1005 if (host->data->error)
1006 sdhci_finish_data(host);
1007 else {
1008 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
1009 sdhci_transfer_pio(host);
1010
1011 /*
1012 * We currently don't do anything fancy with DMA
1013 * boundaries, but as we can't disable the feature
1014 * we need to at least restart the transfer.
1015 */
1016 if (intmask & SDHCI_INT_DMA_END)
1017 writel(readl(host->ioaddr + SDHCI_DMA_ADDRESS),
1018 host->ioaddr + SDHCI_DMA_ADDRESS);
1019
1020 if (intmask & SDHCI_INT_DATA_END) {
1021 if (host->cmd) {
1022 /*
1023 * Data managed to finish before the
1024 * command completed. Make sure we do
1025 * things in the proper order.
1026 */
1027 host->data_early = 1;
1028 } else {
1029 sdhci_finish_data(host);
1030 }
1031 }
1032 }
1033 }
1034
1035 static irqreturn_t sdhci_irq(int irq, void *dev_id)
1036 {
1037 irqreturn_t result;
1038 struct sdhci_host* host = dev_id;
1039 u32 intmask;
1040 int cardint = 0;
1041
1042 spin_lock(&host->lock);
1043
1044 intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
1045
1046 if (!intmask || intmask == 0xffffffff) {
1047 result = IRQ_NONE;
1048 goto out;
1049 }
1050
1051 DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
1052
1053 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
1054 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
1055 host->ioaddr + SDHCI_INT_STATUS);
1056 tasklet_schedule(&host->card_tasklet);
1057 }
1058
1059 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
1060
1061 if (intmask & SDHCI_INT_CMD_MASK) {
1062 writel(intmask & SDHCI_INT_CMD_MASK,
1063 host->ioaddr + SDHCI_INT_STATUS);
1064 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
1065 }
1066
1067 if (intmask & SDHCI_INT_DATA_MASK) {
1068 writel(intmask & SDHCI_INT_DATA_MASK,
1069 host->ioaddr + SDHCI_INT_STATUS);
1070 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
1071 }
1072
1073 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1074
1075 intmask &= ~SDHCI_INT_ERROR;
1076
1077 if (intmask & SDHCI_INT_BUS_POWER) {
1078 printk(KERN_ERR "%s: Card is consuming too much power!\n",
1079 mmc_hostname(host->mmc));
1080 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
1081 }
1082
1083 intmask &= ~SDHCI_INT_BUS_POWER;
1084
1085 if (intmask & SDHCI_INT_CARD_INT)
1086 cardint = 1;
1087
1088 intmask &= ~SDHCI_INT_CARD_INT;
1089
1090 if (intmask) {
1091 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
1092 mmc_hostname(host->mmc), intmask);
1093 sdhci_dumpregs(host);
1094
1095 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
1096 }
1097
1098 result = IRQ_HANDLED;
1099
1100 mmiowb();
1101 out:
1102 spin_unlock(&host->lock);
1103
1104 /*
1105 * We have to delay this as it calls back into the driver.
1106 */
1107 if (cardint)
1108 mmc_signal_sdio_irq(host->mmc);
1109
1110 return result;
1111 }
1112
1113 /*****************************************************************************\
1114 * *
1115 * Suspend/resume *
1116 * *
1117 \*****************************************************************************/
1118
1119 #ifdef CONFIG_PM
1120
1121 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
1122 {
1123 struct sdhci_chip *chip;
1124 int i, ret;
1125
1126 chip = pci_get_drvdata(pdev);
1127 if (!chip)
1128 return 0;
1129
1130 DBG("Suspending...\n");
1131
1132 for (i = 0;i < chip->num_slots;i++) {
1133 if (!chip->hosts[i])
1134 continue;
1135 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1136 if (ret) {
1137 for (i--;i >= 0;i--)
1138 mmc_resume_host(chip->hosts[i]->mmc);
1139 return ret;
1140 }
1141 }
1142
1143 pci_save_state(pdev);
1144 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1145
1146 for (i = 0;i < chip->num_slots;i++) {
1147 if (!chip->hosts[i])
1148 continue;
1149 free_irq(chip->hosts[i]->irq, chip->hosts[i]);
1150 }
1151
1152 pci_disable_device(pdev);
1153 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1154
1155 return 0;
1156 }
1157
1158 static int sdhci_resume (struct pci_dev *pdev)
1159 {
1160 struct sdhci_chip *chip;
1161 int i, ret;
1162
1163 chip = pci_get_drvdata(pdev);
1164 if (!chip)
1165 return 0;
1166
1167 DBG("Resuming...\n");
1168
1169 pci_set_power_state(pdev, PCI_D0);
1170 pci_restore_state(pdev);
1171 ret = pci_enable_device(pdev);
1172 if (ret)
1173 return ret;
1174
1175 for (i = 0;i < chip->num_slots;i++) {
1176 if (!chip->hosts[i])
1177 continue;
1178 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1179 pci_set_master(pdev);
1180 ret = request_irq(chip->hosts[i]->irq, sdhci_irq,
1181 IRQF_SHARED, chip->hosts[i]->slot_descr,
1182 chip->hosts[i]);
1183 if (ret)
1184 return ret;
1185 sdhci_init(chip->hosts[i]);
1186 mmiowb();
1187 ret = mmc_resume_host(chip->hosts[i]->mmc);
1188 if (ret)
1189 return ret;
1190 }
1191
1192 return 0;
1193 }
1194
1195 #else /* CONFIG_PM */
1196
1197 #define sdhci_suspend NULL
1198 #define sdhci_resume NULL
1199
1200 #endif /* CONFIG_PM */
1201
1202 /*****************************************************************************\
1203 * *
1204 * Device probing/removal *
1205 * *
1206 \*****************************************************************************/
1207
1208 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1209 {
1210 int ret;
1211 unsigned int version;
1212 struct sdhci_chip *chip;
1213 struct mmc_host *mmc;
1214 struct sdhci_host *host;
1215
1216 u8 first_bar;
1217 unsigned int caps;
1218
1219 chip = pci_get_drvdata(pdev);
1220 BUG_ON(!chip);
1221
1222 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1223 if (ret)
1224 return ret;
1225
1226 first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1227
1228 if (first_bar > 5) {
1229 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1230 return -ENODEV;
1231 }
1232
1233 if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1234 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1235 return -ENODEV;
1236 }
1237
1238 if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1239 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. "
1240 "You may experience problems.\n");
1241 }
1242
1243 if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1244 printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n");
1245 return -ENODEV;
1246 }
1247
1248 if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1249 printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n");
1250 return -ENODEV;
1251 }
1252
1253 mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1254 if (!mmc)
1255 return -ENOMEM;
1256
1257 host = mmc_priv(mmc);
1258 host->mmc = mmc;
1259
1260 host->chip = chip;
1261 chip->hosts[slot] = host;
1262
1263 host->bar = first_bar + slot;
1264
1265 host->addr = pci_resource_start(pdev, host->bar);
1266 host->irq = pdev->irq;
1267
1268 DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1269
1270 snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1271
1272 ret = pci_request_region(pdev, host->bar, host->slot_descr);
1273 if (ret)
1274 goto free;
1275
1276 host->ioaddr = ioremap_nocache(host->addr,
1277 pci_resource_len(pdev, host->bar));
1278 if (!host->ioaddr) {
1279 ret = -ENOMEM;
1280 goto release;
1281 }
1282
1283 sdhci_reset(host, SDHCI_RESET_ALL);
1284
1285 version = readw(host->ioaddr + SDHCI_HOST_VERSION);
1286 version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
1287 if (version != 0) {
1288 printk(KERN_ERR "%s: Unknown controller version (%d). "
1289 "You may experience problems.\n", host->slot_descr,
1290 version);
1291 }
1292
1293 caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1294
1295 if (debug_nodma)
1296 DBG("DMA forced off\n");
1297 else if (debug_forcedma) {
1298 DBG("DMA forced on\n");
1299 host->flags |= SDHCI_USE_DMA;
1300 } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
1301 host->flags |= SDHCI_USE_DMA;
1302 else if (!(caps & SDHCI_CAN_DO_DMA))
1303 DBG("Controller doesn't have DMA capability\n");
1304 else
1305 host->flags |= SDHCI_USE_DMA;
1306
1307 if (((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
1308 (host->flags & SDHCI_USE_DMA)) {
1309 printk(KERN_WARNING "%s: Will use DMA "
1310 "mode even though HW doesn't fully "
1311 "claim to support it.\n", host->slot_descr);
1312 }
1313
1314 if (host->flags & SDHCI_USE_DMA) {
1315 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1316 printk(KERN_WARNING "%s: No suitable DMA available. "
1317 "Falling back to PIO.\n", host->slot_descr);
1318 host->flags &= ~SDHCI_USE_DMA;
1319 }
1320 }
1321
1322 if (host->flags & SDHCI_USE_DMA)
1323 pci_set_master(pdev);
1324 else /* XXX: Hack to get MMC layer to avoid highmem */
1325 pdev->dma_mask = 0;
1326
1327 host->max_clk =
1328 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1329 if (host->max_clk == 0) {
1330 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1331 "frequency.\n", host->slot_descr);
1332 ret = -ENODEV;
1333 goto unmap;
1334 }
1335 host->max_clk *= 1000000;
1336
1337 host->timeout_clk =
1338 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1339 if (host->timeout_clk == 0) {
1340 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1341 "frequency.\n", host->slot_descr);
1342 ret = -ENODEV;
1343 goto unmap;
1344 }
1345 if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1346 host->timeout_clk *= 1000;
1347
1348 /*
1349 * Set host parameters.
1350 */
1351 mmc->ops = &sdhci_ops;
1352 mmc->f_min = host->max_clk / 256;
1353 mmc->f_max = host->max_clk;
1354 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_SDIO_IRQ;
1355
1356 if (caps & SDHCI_CAN_DO_HISPD)
1357 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
1358
1359 mmc->ocr_avail = 0;
1360 if (caps & SDHCI_CAN_VDD_330)
1361 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1362 if (caps & SDHCI_CAN_VDD_300)
1363 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1364 if (caps & SDHCI_CAN_VDD_180)
1365 mmc->ocr_avail |= MMC_VDD_165_195;
1366
1367 if (mmc->ocr_avail == 0) {
1368 printk(KERN_ERR "%s: Hardware doesn't report any "
1369 "support voltages.\n", host->slot_descr);
1370 ret = -ENODEV;
1371 goto unmap;
1372 }
1373
1374 spin_lock_init(&host->lock);
1375
1376 /*
1377 * Maximum number of segments. Hardware cannot do scatter lists.
1378 */
1379 if (host->flags & SDHCI_USE_DMA)
1380 mmc->max_hw_segs = 1;
1381 else
1382 mmc->max_hw_segs = 16;
1383 mmc->max_phys_segs = 16;
1384
1385 /*
1386 * Maximum number of sectors in one transfer. Limited by DMA boundary
1387 * size (512KiB).
1388 */
1389 mmc->max_req_size = 524288;
1390
1391 /*
1392 * Maximum segment size. Could be one segment with the maximum number
1393 * of bytes.
1394 */
1395 mmc->max_seg_size = mmc->max_req_size;
1396
1397 /*
1398 * Maximum block size. This varies from controller to controller and
1399 * is specified in the capabilities register.
1400 */
1401 mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1402 if (mmc->max_blk_size >= 3) {
1403 printk(KERN_WARNING "%s: Invalid maximum block size, assuming 512\n",
1404 host->slot_descr);
1405 mmc->max_blk_size = 512;
1406 } else
1407 mmc->max_blk_size = 512 << mmc->max_blk_size;
1408
1409 /*
1410 * Maximum block count.
1411 */
1412 mmc->max_blk_count = 65535;
1413
1414 /*
1415 * Init tasklets.
1416 */
1417 tasklet_init(&host->card_tasklet,
1418 sdhci_tasklet_card, (unsigned long)host);
1419 tasklet_init(&host->finish_tasklet,
1420 sdhci_tasklet_finish, (unsigned long)host);
1421
1422 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
1423
1424 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1425 host->slot_descr, host);
1426 if (ret)
1427 goto untasklet;
1428
1429 sdhci_init(host);
1430
1431 #ifdef CONFIG_MMC_DEBUG
1432 sdhci_dumpregs(host);
1433 #endif
1434
1435 mmiowb();
1436
1437 mmc_add_host(mmc);
1438
1439 printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1440 host->addr, host->irq,
1441 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1442
1443 return 0;
1444
1445 untasklet:
1446 tasklet_kill(&host->card_tasklet);
1447 tasklet_kill(&host->finish_tasklet);
1448 unmap:
1449 iounmap(host->ioaddr);
1450 release:
1451 pci_release_region(pdev, host->bar);
1452 free:
1453 mmc_free_host(mmc);
1454
1455 return ret;
1456 }
1457
1458 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1459 {
1460 struct sdhci_chip *chip;
1461 struct mmc_host *mmc;
1462 struct sdhci_host *host;
1463
1464 chip = pci_get_drvdata(pdev);
1465 host = chip->hosts[slot];
1466 mmc = host->mmc;
1467
1468 chip->hosts[slot] = NULL;
1469
1470 mmc_remove_host(mmc);
1471
1472 sdhci_reset(host, SDHCI_RESET_ALL);
1473
1474 free_irq(host->irq, host);
1475
1476 del_timer_sync(&host->timer);
1477
1478 tasklet_kill(&host->card_tasklet);
1479 tasklet_kill(&host->finish_tasklet);
1480
1481 iounmap(host->ioaddr);
1482
1483 pci_release_region(pdev, host->bar);
1484
1485 mmc_free_host(mmc);
1486 }
1487
1488 static int __devinit sdhci_probe(struct pci_dev *pdev,
1489 const struct pci_device_id *ent)
1490 {
1491 int ret, i;
1492 u8 slots, rev;
1493 struct sdhci_chip *chip;
1494
1495 BUG_ON(pdev == NULL);
1496 BUG_ON(ent == NULL);
1497
1498 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1499
1500 printk(KERN_INFO DRIVER_NAME
1501 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1502 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1503 (int)rev);
1504
1505 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1506 if (ret)
1507 return ret;
1508
1509 slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1510 DBG("found %d slot(s)\n", slots);
1511 if (slots == 0)
1512 return -ENODEV;
1513
1514 ret = pci_enable_device(pdev);
1515 if (ret)
1516 return ret;
1517
1518 chip = kzalloc(sizeof(struct sdhci_chip) +
1519 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1520 if (!chip) {
1521 ret = -ENOMEM;
1522 goto err;
1523 }
1524
1525 chip->pdev = pdev;
1526 chip->quirks = ent->driver_data;
1527
1528 if (debug_quirks)
1529 chip->quirks = debug_quirks;
1530
1531 chip->num_slots = slots;
1532 pci_set_drvdata(pdev, chip);
1533
1534 for (i = 0;i < slots;i++) {
1535 ret = sdhci_probe_slot(pdev, i);
1536 if (ret) {
1537 for (i--;i >= 0;i--)
1538 sdhci_remove_slot(pdev, i);
1539 goto free;
1540 }
1541 }
1542
1543 return 0;
1544
1545 free:
1546 pci_set_drvdata(pdev, NULL);
1547 kfree(chip);
1548
1549 err:
1550 pci_disable_device(pdev);
1551 return ret;
1552 }
1553
1554 static void __devexit sdhci_remove(struct pci_dev *pdev)
1555 {
1556 int i;
1557 struct sdhci_chip *chip;
1558
1559 chip = pci_get_drvdata(pdev);
1560
1561 if (chip) {
1562 for (i = 0;i < chip->num_slots;i++)
1563 sdhci_remove_slot(pdev, i);
1564
1565 pci_set_drvdata(pdev, NULL);
1566
1567 kfree(chip);
1568 }
1569
1570 pci_disable_device(pdev);
1571 }
1572
1573 static struct pci_driver sdhci_driver = {
1574 .name = DRIVER_NAME,
1575 .id_table = pci_ids,
1576 .probe = sdhci_probe,
1577 .remove = __devexit_p(sdhci_remove),
1578 .suspend = sdhci_suspend,
1579 .resume = sdhci_resume,
1580 };
1581
1582 /*****************************************************************************\
1583 * *
1584 * Driver init/exit *
1585 * *
1586 \*****************************************************************************/
1587
1588 static int __init sdhci_drv_init(void)
1589 {
1590 printk(KERN_INFO DRIVER_NAME
1591 ": Secure Digital Host Controller Interface driver\n");
1592 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1593
1594 return pci_register_driver(&sdhci_driver);
1595 }
1596
1597 static void __exit sdhci_drv_exit(void)
1598 {
1599 DBG("Exiting\n");
1600
1601 pci_unregister_driver(&sdhci_driver);
1602 }
1603
1604 module_init(sdhci_drv_init);
1605 module_exit(sdhci_drv_exit);
1606
1607 module_param(debug_nodma, uint, 0444);
1608 module_param(debug_forcedma, uint, 0444);
1609 module_param(debug_quirks, uint, 0444);
1610
1611 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1612 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1613 MODULE_LICENSE("GPL");
1614
1615 MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
1616 MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
1617 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
Support for the Chinese Samsung S3C2440 based development boards