Merge branch 'for-2.6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux-2.6] / drivers / mmc / sdhci.c
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
41 static const struct pci_device_id pci_ids[] __devinitdata = {
42         {
43                 .vendor         = PCI_VENDOR_ID_RICOH,
44                 .device         = PCI_DEVICE_ID_RICOH_R5C822,
45                 .subvendor      = PCI_VENDOR_ID_IBM,
46                 .subdevice      = PCI_ANY_ID,
47                 .driver_data    = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
48                                   SDHCI_QUIRK_FORCE_DMA,
49         },
50
51         {
52                 .vendor         = PCI_VENDOR_ID_RICOH,
53                 .device         = PCI_DEVICE_ID_RICOH_R5C822,
54                 .subvendor      = PCI_ANY_ID,
55                 .subdevice      = PCI_ANY_ID,
56                 .driver_data    = SDHCI_QUIRK_FORCE_DMA |
57                                   SDHCI_QUIRK_NO_CARD_NO_RESET,
58         },
59
60         {
61                 .vendor         = PCI_VENDOR_ID_TI,
62                 .device         = PCI_DEVICE_ID_TI_XX21_XX11_SD,
63                 .subvendor      = PCI_ANY_ID,
64                 .subdevice      = PCI_ANY_ID,
65                 .driver_data    = SDHCI_QUIRK_FORCE_DMA,
66         },
67
68         {       /* Generic SD host controller */
69                 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
70         },
71
72         { /* end: all zeroes */ },
73 };
74
75 MODULE_DEVICE_TABLE(pci, pci_ids);
76
77 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
78 static void sdhci_finish_data(struct sdhci_host *);
79
80 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
81 static void sdhci_finish_command(struct sdhci_host *);
82
83 static void sdhci_dumpregs(struct sdhci_host *host)
84 {
85         printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
86
87         printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version:  0x%08x\n",
88                 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
89                 readw(host->ioaddr + SDHCI_HOST_VERSION));
90         printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt:  0x%08x\n",
91                 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
92                 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
93         printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
94                 readl(host->ioaddr + SDHCI_ARGUMENT),
95                 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
96         printk(KERN_DEBUG DRIVER_NAME ": Present:  0x%08x | Host ctl: 0x%08x\n",
97                 readl(host->ioaddr + SDHCI_PRESENT_STATE),
98                 readb(host->ioaddr + SDHCI_HOST_CONTROL));
99         printk(KERN_DEBUG DRIVER_NAME ": Power:    0x%08x | Blk gap:  0x%08x\n",
100                 readb(host->ioaddr + SDHCI_POWER_CONTROL),
101                 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
102         printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
103                 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
104                 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
105         printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
106                 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
107                 readl(host->ioaddr + SDHCI_INT_STATUS));
108         printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
109                 readl(host->ioaddr + SDHCI_INT_ENABLE),
110                 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
111         printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
112                 readw(host->ioaddr + SDHCI_ACMD12_ERR),
113                 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
114         printk(KERN_DEBUG DRIVER_NAME ": Caps:     0x%08x | Max curr: 0x%08x\n",
115                 readl(host->ioaddr + SDHCI_CAPABILITIES),
116                 readl(host->ioaddr + SDHCI_MAX_CURRENT));
117
118         printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
119 }
120
121 /*****************************************************************************\
122  *                                                                           *
123  * Low level functions                                                       *
124  *                                                                           *
125 \*****************************************************************************/
126
127 static void sdhci_reset(struct sdhci_host *host, u8 mask)
128 {
129         unsigned long timeout;
130
131         if (host->chip->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
132                 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
133                         SDHCI_CARD_PRESENT))
134                         return;
135         }
136
137         writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
138
139         if (mask & SDHCI_RESET_ALL)
140                 host->clock = 0;
141
142         /* Wait max 100 ms */
143         timeout = 100;
144
145         /* hw clears the bit when it's done */
146         while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
147                 if (timeout == 0) {
148                         printk(KERN_ERR "%s: Reset 0x%x never completed. "
149                                 "Please report this to " BUGMAIL ".\n",
150                                 mmc_hostname(host->mmc), (int)mask);
151                         sdhci_dumpregs(host);
152                         return;
153                 }
154                 timeout--;
155                 mdelay(1);
156         }
157 }
158
159 static void sdhci_init(struct sdhci_host *host)
160 {
161         u32 intmask;
162
163         sdhci_reset(host, SDHCI_RESET_ALL);
164
165         intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
166                 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
167                 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
168                 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
169                 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
170                 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
171
172         writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
173         writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
174 }
175
176 static void sdhci_activate_led(struct sdhci_host *host)
177 {
178         u8 ctrl;
179
180         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
181         ctrl |= SDHCI_CTRL_LED;
182         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
183 }
184
185 static void sdhci_deactivate_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 /*****************************************************************************\
195  *                                                                           *
196  * Core functions                                                            *
197  *                                                                           *
198 \*****************************************************************************/
199
200 static inline char* sdhci_kmap_sg(struct sdhci_host* host)
201 {
202         host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ);
203         return host->mapped_sg + host->cur_sg->offset;
204 }
205
206 static inline void sdhci_kunmap_sg(struct sdhci_host* host)
207 {
208         kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
209 }
210
211 static inline int sdhci_next_sg(struct sdhci_host* host)
212 {
213         /*
214          * Skip to next SG entry.
215          */
216         host->cur_sg++;
217         host->num_sg--;
218
219         /*
220          * Any entries left?
221          */
222         if (host->num_sg > 0) {
223                 host->offset = 0;
224                 host->remain = host->cur_sg->length;
225         }
226
227         return host->num_sg;
228 }
229
230 static void sdhci_read_block_pio(struct sdhci_host *host)
231 {
232         int blksize, chunk_remain;
233         u32 data;
234         char *buffer;
235         int size;
236
237         DBG("PIO reading\n");
238
239         blksize = host->data->blksz;
240         chunk_remain = 0;
241         data = 0;
242
243         buffer = sdhci_kmap_sg(host) + host->offset;
244
245         while (blksize) {
246                 if (chunk_remain == 0) {
247                         data = readl(host->ioaddr + SDHCI_BUFFER);
248                         chunk_remain = min(blksize, 4);
249                 }
250
251                 size = min(host->size, host->remain);
252                 size = min(size, chunk_remain);
253
254                 chunk_remain -= size;
255                 blksize -= size;
256                 host->offset += size;
257                 host->remain -= size;
258                 host->size -= size;
259                 while (size) {
260                         *buffer = data & 0xFF;
261                         buffer++;
262                         data >>= 8;
263                         size--;
264                 }
265
266                 if (host->remain == 0) {
267                         sdhci_kunmap_sg(host);
268                         if (sdhci_next_sg(host) == 0) {
269                                 BUG_ON(blksize != 0);
270                                 return;
271                         }
272                         buffer = sdhci_kmap_sg(host);
273                 }
274         }
275
276         sdhci_kunmap_sg(host);
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_kmap_sg(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                         sdhci_kunmap_sg(host);
318                         if (sdhci_next_sg(host) == 0) {
319                                 BUG_ON(blksize != 0);
320                                 return;
321                         }
322                         buffer = sdhci_kmap_sg(host);
323                 }
324         }
325
326         sdhci_kunmap_sg(host);
327 }
328
329 static void sdhci_transfer_pio(struct sdhci_host *host)
330 {
331         u32 mask;
332
333         BUG_ON(!host->data);
334
335         if (host->size == 0)
336                 return;
337
338         if (host->data->flags & MMC_DATA_READ)
339                 mask = SDHCI_DATA_AVAILABLE;
340         else
341                 mask = SDHCI_SPACE_AVAILABLE;
342
343         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
344                 if (host->data->flags & MMC_DATA_READ)
345                         sdhci_read_block_pio(host);
346                 else
347                         sdhci_write_block_pio(host);
348
349                 if (host->size == 0)
350                         break;
351
352                 BUG_ON(host->num_sg == 0);
353         }
354
355         DBG("PIO transfer complete.\n");
356 }
357
358 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
359 {
360         u8 count;
361         unsigned target_timeout, current_timeout;
362
363         WARN_ON(host->data);
364
365         if (data == NULL)
366                 return;
367
368         DBG("blksz %04x blks %04x flags %08x\n",
369                 data->blksz, data->blocks, data->flags);
370         DBG("tsac %d ms nsac %d clk\n",
371                 data->timeout_ns / 1000000, data->timeout_clks);
372
373         /* Sanity checks */
374         BUG_ON(data->blksz * data->blocks > 524288);
375         BUG_ON(data->blksz > host->max_block);
376         BUG_ON(data->blocks > 65535);
377
378         /* timeout in us */
379         target_timeout = data->timeout_ns / 1000 +
380                 data->timeout_clks / host->clock;
381
382         /*
383          * Figure out needed cycles.
384          * We do this in steps in order to fit inside a 32 bit int.
385          * The first step is the minimum timeout, which will have a
386          * minimum resolution of 6 bits:
387          * (1) 2^13*1000 > 2^22,
388          * (2) host->timeout_clk < 2^16
389          *     =>
390          *     (1) / (2) > 2^6
391          */
392         count = 0;
393         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
394         while (current_timeout < target_timeout) {
395                 count++;
396                 current_timeout <<= 1;
397                 if (count >= 0xF)
398                         break;
399         }
400
401         if (count >= 0xF) {
402                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
403                         mmc_hostname(host->mmc));
404                 count = 0xE;
405         }
406
407         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
408
409         if (host->flags & SDHCI_USE_DMA) {
410                 int count;
411
412                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
413                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
414                 BUG_ON(count != 1);
415
416                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
417         } else {
418                 host->size = data->blksz * data->blocks;
419
420                 host->cur_sg = data->sg;
421                 host->num_sg = data->sg_len;
422
423                 host->offset = 0;
424                 host->remain = host->cur_sg->length;
425         }
426
427         /* We do not handle DMA boundaries, so set it to max (512 KiB) */
428         writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
429                 host->ioaddr + SDHCI_BLOCK_SIZE);
430         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
431 }
432
433 static void sdhci_set_transfer_mode(struct sdhci_host *host,
434         struct mmc_data *data)
435 {
436         u16 mode;
437
438         WARN_ON(host->data);
439
440         if (data == NULL)
441                 return;
442
443         mode = SDHCI_TRNS_BLK_CNT_EN;
444         if (data->blocks > 1)
445                 mode |= SDHCI_TRNS_MULTI;
446         if (data->flags & MMC_DATA_READ)
447                 mode |= SDHCI_TRNS_READ;
448         if (host->flags & SDHCI_USE_DMA)
449                 mode |= SDHCI_TRNS_DMA;
450
451         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
452 }
453
454 static void sdhci_finish_data(struct sdhci_host *host)
455 {
456         struct mmc_data *data;
457         u16 blocks;
458
459         BUG_ON(!host->data);
460
461         data = host->data;
462         host->data = NULL;
463
464         if (host->flags & SDHCI_USE_DMA) {
465                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
466                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
467         }
468
469         /*
470          * Controller doesn't count down when in single block mode.
471          */
472         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
473                 blocks = 0;
474         else
475                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
476         data->bytes_xfered = data->blksz * (data->blocks - blocks);
477
478         if ((data->error == MMC_ERR_NONE) && blocks) {
479                 printk(KERN_ERR "%s: Controller signalled completion even "
480                         "though there were blocks left. Please report this "
481                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
482                 data->error = MMC_ERR_FAILED;
483         } else if (host->size != 0) {
484                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
485                         "Please report this to " BUGMAIL ".\n",
486                         mmc_hostname(host->mmc), host->size);
487                 data->error = MMC_ERR_FAILED;
488         }
489
490         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
491
492         if (data->stop) {
493                 /*
494                  * The controller needs a reset of internal state machines
495                  * upon error conditions.
496                  */
497                 if (data->error != MMC_ERR_NONE) {
498                         sdhci_reset(host, SDHCI_RESET_CMD);
499                         sdhci_reset(host, SDHCI_RESET_DATA);
500                 }
501
502                 sdhci_send_command(host, data->stop);
503         } else
504                 tasklet_schedule(&host->finish_tasklet);
505 }
506
507 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
508 {
509         int flags;
510         u32 mask;
511         unsigned long timeout;
512
513         WARN_ON(host->cmd);
514
515         DBG("Sending cmd (%x)\n", cmd->opcode);
516
517         /* Wait max 10 ms */
518         timeout = 10;
519
520         mask = SDHCI_CMD_INHIBIT;
521         if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
522                 mask |= SDHCI_DATA_INHIBIT;
523
524         /* We shouldn't wait for data inihibit for stop commands, even
525            though they might use busy signaling */
526         if (host->mrq->data && (cmd == host->mrq->data->stop))
527                 mask &= ~SDHCI_DATA_INHIBIT;
528
529         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
530                 if (timeout == 0) {
531                         printk(KERN_ERR "%s: Controller never released "
532                                 "inhibit bit(s). Please report this to "
533                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
534                         sdhci_dumpregs(host);
535                         cmd->error = MMC_ERR_FAILED;
536                         tasklet_schedule(&host->finish_tasklet);
537                         return;
538                 }
539                 timeout--;
540                 mdelay(1);
541         }
542
543         mod_timer(&host->timer, jiffies + 10 * HZ);
544
545         host->cmd = cmd;
546
547         sdhci_prepare_data(host, cmd->data);
548
549         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
550
551         sdhci_set_transfer_mode(host, cmd->data);
552
553         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
554                 printk(KERN_ERR "%s: Unsupported response type! "
555                         "Please report this to " BUGMAIL ".\n",
556                         mmc_hostname(host->mmc));
557                 cmd->error = MMC_ERR_INVALID;
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 = MMC_ERR_NONE;
605
606         DBG("Ending cmd (%x)\n", host->cmd->opcode);
607
608         if (host->cmd->data)
609                 host->data = host->cmd->data;
610         else
611                 tasklet_schedule(&host->finish_tasklet);
612
613         host->cmd = NULL;
614 }
615
616 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
617 {
618         int div;
619         u16 clk;
620         unsigned long timeout;
621
622         if (clock == host->clock)
623                 return;
624
625         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
626
627         if (clock == 0)
628                 goto out;
629
630         for (div = 1;div < 256;div *= 2) {
631                 if ((host->max_clk / div) <= clock)
632                         break;
633         }
634         div >>= 1;
635
636         clk = div << SDHCI_DIVIDER_SHIFT;
637         clk |= SDHCI_CLOCK_INT_EN;
638         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
639
640         /* Wait max 10 ms */
641         timeout = 10;
642         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
643                 & SDHCI_CLOCK_INT_STABLE)) {
644                 if (timeout == 0) {
645                         printk(KERN_ERR "%s: Internal clock never stabilised. "
646                                 "Please report this to " BUGMAIL ".\n",
647                                 mmc_hostname(host->mmc));
648                         sdhci_dumpregs(host);
649                         return;
650                 }
651                 timeout--;
652                 mdelay(1);
653         }
654
655         clk |= SDHCI_CLOCK_CARD_EN;
656         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
657
658 out:
659         host->clock = clock;
660 }
661
662 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
663 {
664         u8 pwr;
665
666         if (host->power == power)
667                 return;
668
669         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
670
671         if (power == (unsigned short)-1)
672                 goto out;
673
674         pwr = SDHCI_POWER_ON;
675
676         switch (power) {
677         case MMC_VDD_170:
678         case MMC_VDD_180:
679         case MMC_VDD_190:
680                 pwr |= SDHCI_POWER_180;
681                 break;
682         case MMC_VDD_290:
683         case MMC_VDD_300:
684         case MMC_VDD_310:
685                 pwr |= SDHCI_POWER_300;
686                 break;
687         case MMC_VDD_320:
688         case MMC_VDD_330:
689         case MMC_VDD_340:
690                 pwr |= SDHCI_POWER_330;
691                 break;
692         default:
693                 BUG();
694         }
695
696         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
697
698 out:
699         host->power = power;
700 }
701
702 /*****************************************************************************\
703  *                                                                           *
704  * MMC callbacks                                                             *
705  *                                                                           *
706 \*****************************************************************************/
707
708 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
709 {
710         struct sdhci_host *host;
711         unsigned long flags;
712
713         host = mmc_priv(mmc);
714
715         spin_lock_irqsave(&host->lock, flags);
716
717         WARN_ON(host->mrq != NULL);
718
719         sdhci_activate_led(host);
720
721         host->mrq = mrq;
722
723         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
724                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
725                 tasklet_schedule(&host->finish_tasklet);
726         } else
727                 sdhci_send_command(host, mrq->cmd);
728
729         mmiowb();
730         spin_unlock_irqrestore(&host->lock, flags);
731 }
732
733 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
734 {
735         struct sdhci_host *host;
736         unsigned long flags;
737         u8 ctrl;
738
739         host = mmc_priv(mmc);
740
741         spin_lock_irqsave(&host->lock, flags);
742
743         /*
744          * Reset the chip on each power off.
745          * Should clear out any weird states.
746          */
747         if (ios->power_mode == MMC_POWER_OFF) {
748                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
749                 sdhci_init(host);
750         }
751
752         sdhci_set_clock(host, ios->clock);
753
754         if (ios->power_mode == MMC_POWER_OFF)
755                 sdhci_set_power(host, -1);
756         else
757                 sdhci_set_power(host, ios->vdd);
758
759         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
760         if (ios->bus_width == MMC_BUS_WIDTH_4)
761                 ctrl |= SDHCI_CTRL_4BITBUS;
762         else
763                 ctrl &= ~SDHCI_CTRL_4BITBUS;
764         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
765
766         mmiowb();
767         spin_unlock_irqrestore(&host->lock, flags);
768 }
769
770 static int sdhci_get_ro(struct mmc_host *mmc)
771 {
772         struct sdhci_host *host;
773         unsigned long flags;
774         int present;
775
776         host = mmc_priv(mmc);
777
778         spin_lock_irqsave(&host->lock, flags);
779
780         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
781
782         spin_unlock_irqrestore(&host->lock, flags);
783
784         return !(present & SDHCI_WRITE_PROTECT);
785 }
786
787 static struct mmc_host_ops sdhci_ops = {
788         .request        = sdhci_request,
789         .set_ios        = sdhci_set_ios,
790         .get_ro         = sdhci_get_ro,
791 };
792
793 /*****************************************************************************\
794  *                                                                           *
795  * Tasklets                                                                  *
796  *                                                                           *
797 \*****************************************************************************/
798
799 static void sdhci_tasklet_card(unsigned long param)
800 {
801         struct sdhci_host *host;
802         unsigned long flags;
803
804         host = (struct sdhci_host*)param;
805
806         spin_lock_irqsave(&host->lock, flags);
807
808         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
809                 if (host->mrq) {
810                         printk(KERN_ERR "%s: Card removed during transfer!\n",
811                                 mmc_hostname(host->mmc));
812                         printk(KERN_ERR "%s: Resetting controller.\n",
813                                 mmc_hostname(host->mmc));
814
815                         sdhci_reset(host, SDHCI_RESET_CMD);
816                         sdhci_reset(host, SDHCI_RESET_DATA);
817
818                         host->mrq->cmd->error = MMC_ERR_FAILED;
819                         tasklet_schedule(&host->finish_tasklet);
820                 }
821         }
822
823         spin_unlock_irqrestore(&host->lock, flags);
824
825         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
826 }
827
828 static void sdhci_tasklet_finish(unsigned long param)
829 {
830         struct sdhci_host *host;
831         unsigned long flags;
832         struct mmc_request *mrq;
833
834         host = (struct sdhci_host*)param;
835
836         spin_lock_irqsave(&host->lock, flags);
837
838         del_timer(&host->timer);
839
840         mrq = host->mrq;
841
842         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
843
844         /*
845          * The controller needs a reset of internal state machines
846          * upon error conditions.
847          */
848         if ((mrq->cmd->error != MMC_ERR_NONE) ||
849                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
850                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
851
852                 /* Some controllers need this kick or reset won't work here */
853                 if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
854                         unsigned int clock;
855
856                         /* This is to force an update */
857                         clock = host->clock;
858                         host->clock = 0;
859                         sdhci_set_clock(host, clock);
860                 }
861
862                 /* Spec says we should do both at the same time, but Ricoh
863                    controllers do not like that. */
864                 sdhci_reset(host, SDHCI_RESET_CMD);
865                 sdhci_reset(host, SDHCI_RESET_DATA);
866         }
867
868         host->mrq = NULL;
869         host->cmd = NULL;
870         host->data = NULL;
871
872         sdhci_deactivate_led(host);
873
874         mmiowb();
875         spin_unlock_irqrestore(&host->lock, flags);
876
877         mmc_request_done(host->mmc, mrq);
878 }
879
880 static void sdhci_timeout_timer(unsigned long data)
881 {
882         struct sdhci_host *host;
883         unsigned long flags;
884
885         host = (struct sdhci_host*)data;
886
887         spin_lock_irqsave(&host->lock, flags);
888
889         if (host->mrq) {
890                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
891                         "Please report this to " BUGMAIL ".\n",
892                         mmc_hostname(host->mmc));
893                 sdhci_dumpregs(host);
894
895                 if (host->data) {
896                         host->data->error = MMC_ERR_TIMEOUT;
897                         sdhci_finish_data(host);
898                 } else {
899                         if (host->cmd)
900                                 host->cmd->error = MMC_ERR_TIMEOUT;
901                         else
902                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
903
904                         tasklet_schedule(&host->finish_tasklet);
905                 }
906         }
907
908         mmiowb();
909         spin_unlock_irqrestore(&host->lock, flags);
910 }
911
912 /*****************************************************************************\
913  *                                                                           *
914  * Interrupt handling                                                        *
915  *                                                                           *
916 \*****************************************************************************/
917
918 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
919 {
920         BUG_ON(intmask == 0);
921
922         if (!host->cmd) {
923                 printk(KERN_ERR "%s: Got command interrupt even though no "
924                         "command operation was in progress.\n",
925                         mmc_hostname(host->mmc));
926                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
927                         mmc_hostname(host->mmc));
928                 sdhci_dumpregs(host);
929                 return;
930         }
931
932         if (intmask & SDHCI_INT_RESPONSE)
933                 sdhci_finish_command(host);
934         else {
935                 if (intmask & SDHCI_INT_TIMEOUT)
936                         host->cmd->error = MMC_ERR_TIMEOUT;
937                 else if (intmask & SDHCI_INT_CRC)
938                         host->cmd->error = MMC_ERR_BADCRC;
939                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
940                         host->cmd->error = MMC_ERR_FAILED;
941                 else
942                         host->cmd->error = MMC_ERR_INVALID;
943
944                 tasklet_schedule(&host->finish_tasklet);
945         }
946 }
947
948 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
949 {
950         BUG_ON(intmask == 0);
951
952         if (!host->data) {
953                 /*
954                  * A data end interrupt is sent together with the response
955                  * for the stop command.
956                  */
957                 if (intmask & SDHCI_INT_DATA_END)
958                         return;
959
960                 printk(KERN_ERR "%s: Got data interrupt even though no "
961                         "data operation was in progress.\n",
962                         mmc_hostname(host->mmc));
963                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
964                         mmc_hostname(host->mmc));
965                 sdhci_dumpregs(host);
966
967                 return;
968         }
969
970         if (intmask & SDHCI_INT_DATA_TIMEOUT)
971                 host->data->error = MMC_ERR_TIMEOUT;
972         else if (intmask & SDHCI_INT_DATA_CRC)
973                 host->data->error = MMC_ERR_BADCRC;
974         else if (intmask & SDHCI_INT_DATA_END_BIT)
975                 host->data->error = MMC_ERR_FAILED;
976
977         if (host->data->error != MMC_ERR_NONE)
978                 sdhci_finish_data(host);
979         else {
980                 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
981                         sdhci_transfer_pio(host);
982
983                 if (intmask & SDHCI_INT_DATA_END)
984                         sdhci_finish_data(host);
985         }
986 }
987
988 static irqreturn_t sdhci_irq(int irq, void *dev_id)
989 {
990         irqreturn_t result;
991         struct sdhci_host* host = dev_id;
992         u32 intmask;
993
994         spin_lock(&host->lock);
995
996         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
997
998         if (!intmask) {
999                 result = IRQ_NONE;
1000                 goto out;
1001         }
1002
1003         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
1004
1005         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
1006                 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
1007                         host->ioaddr + SDHCI_INT_STATUS);
1008                 tasklet_schedule(&host->card_tasklet);
1009         }
1010
1011         intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
1012
1013         if (intmask & SDHCI_INT_CMD_MASK) {
1014                 writel(intmask & SDHCI_INT_CMD_MASK,
1015                         host->ioaddr + SDHCI_INT_STATUS);
1016                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
1017         }
1018
1019         if (intmask & SDHCI_INT_DATA_MASK) {
1020                 writel(intmask & SDHCI_INT_DATA_MASK,
1021                         host->ioaddr + SDHCI_INT_STATUS);
1022                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
1023         }
1024
1025         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1026
1027         if (intmask & SDHCI_INT_BUS_POWER) {
1028                 printk(KERN_ERR "%s: Card is consuming too much power!\n",
1029                         mmc_hostname(host->mmc));
1030                 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
1031         }
1032
1033         intmask &= SDHCI_INT_BUS_POWER;
1034
1035         if (intmask) {
1036                 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
1037                         "report this to " BUGMAIL ".\n",
1038                         mmc_hostname(host->mmc), intmask);
1039                 sdhci_dumpregs(host);
1040
1041                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
1042         }
1043
1044         result = IRQ_HANDLED;
1045
1046         mmiowb();
1047 out:
1048         spin_unlock(&host->lock);
1049
1050         return result;
1051 }
1052
1053 /*****************************************************************************\
1054  *                                                                           *
1055  * Suspend/resume                                                            *
1056  *                                                                           *
1057 \*****************************************************************************/
1058
1059 #ifdef CONFIG_PM
1060
1061 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
1062 {
1063         struct sdhci_chip *chip;
1064         int i, ret;
1065
1066         chip = pci_get_drvdata(pdev);
1067         if (!chip)
1068                 return 0;
1069
1070         DBG("Suspending...\n");
1071
1072         for (i = 0;i < chip->num_slots;i++) {
1073                 if (!chip->hosts[i])
1074                         continue;
1075                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1076                 if (ret) {
1077                         for (i--;i >= 0;i--)
1078                                 mmc_resume_host(chip->hosts[i]->mmc);
1079                         return ret;
1080                 }
1081         }
1082
1083         pci_save_state(pdev);
1084         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1085         pci_disable_device(pdev);
1086         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1087
1088         return 0;
1089 }
1090
1091 static int sdhci_resume (struct pci_dev *pdev)
1092 {
1093         struct sdhci_chip *chip;
1094         int i, ret;
1095
1096         chip = pci_get_drvdata(pdev);
1097         if (!chip)
1098                 return 0;
1099
1100         DBG("Resuming...\n");
1101
1102         pci_set_power_state(pdev, PCI_D0);
1103         pci_restore_state(pdev);
1104         pci_enable_device(pdev);
1105
1106         for (i = 0;i < chip->num_slots;i++) {
1107                 if (!chip->hosts[i])
1108                         continue;
1109                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1110                         pci_set_master(pdev);
1111                 sdhci_init(chip->hosts[i]);
1112                 mmiowb();
1113                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1114                 if (ret)
1115                         return ret;
1116         }
1117
1118         return 0;
1119 }
1120
1121 #else /* CONFIG_PM */
1122
1123 #define sdhci_suspend NULL
1124 #define sdhci_resume NULL
1125
1126 #endif /* CONFIG_PM */
1127
1128 /*****************************************************************************\
1129  *                                                                           *
1130  * Device probing/removal                                                    *
1131  *                                                                           *
1132 \*****************************************************************************/
1133
1134 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1135 {
1136         int ret;
1137         unsigned int version;
1138         struct sdhci_chip *chip;
1139         struct mmc_host *mmc;
1140         struct sdhci_host *host;
1141
1142         u8 first_bar;
1143         unsigned int caps;
1144
1145         chip = pci_get_drvdata(pdev);
1146         BUG_ON(!chip);
1147
1148         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1149         if (ret)
1150                 return ret;
1151
1152         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1153
1154         if (first_bar > 5) {
1155                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1156                 return -ENODEV;
1157         }
1158
1159         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1160                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1161                 return -ENODEV;
1162         }
1163
1164         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1165                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1166                 return -ENODEV;
1167         }
1168
1169         if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1170                 printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n");
1171                 return -ENODEV;
1172         }
1173
1174         if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1175                 printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n");
1176                 return -ENODEV;
1177         }
1178
1179         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1180         if (!mmc)
1181                 return -ENOMEM;
1182
1183         host = mmc_priv(mmc);
1184         host->mmc = mmc;
1185
1186         host->chip = chip;
1187         chip->hosts[slot] = host;
1188
1189         host->bar = first_bar + slot;
1190
1191         host->addr = pci_resource_start(pdev, host->bar);
1192         host->irq = pdev->irq;
1193
1194         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1195
1196         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1197
1198         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1199         if (ret)
1200                 goto free;
1201
1202         host->ioaddr = ioremap_nocache(host->addr,
1203                 pci_resource_len(pdev, host->bar));
1204         if (!host->ioaddr) {
1205                 ret = -ENOMEM;
1206                 goto release;
1207         }
1208
1209         sdhci_reset(host, SDHCI_RESET_ALL);
1210
1211         version = readw(host->ioaddr + SDHCI_HOST_VERSION);
1212         version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
1213         if (version != 0) {
1214                 printk(KERN_ERR "%s: Unknown controller version (%d). "
1215                         "You may experience problems.\n", host->slot_descr,
1216                         version);
1217         }
1218
1219         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1220
1221         if (debug_nodma)
1222                 DBG("DMA forced off\n");
1223         else if (debug_forcedma) {
1224                 DBG("DMA forced on\n");
1225                 host->flags |= SDHCI_USE_DMA;
1226         } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
1227                 host->flags |= SDHCI_USE_DMA;
1228         else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
1229                 DBG("Controller doesn't have DMA interface\n");
1230         else if (!(caps & SDHCI_CAN_DO_DMA))
1231                 DBG("Controller doesn't have DMA capability\n");
1232         else
1233                 host->flags |= SDHCI_USE_DMA;
1234
1235         if (host->flags & SDHCI_USE_DMA) {
1236                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1237                         printk(KERN_WARNING "%s: No suitable DMA available. "
1238                                 "Falling back to PIO.\n", host->slot_descr);
1239                         host->flags &= ~SDHCI_USE_DMA;
1240                 }
1241         }
1242
1243         if (host->flags & SDHCI_USE_DMA)
1244                 pci_set_master(pdev);
1245         else /* XXX: Hack to get MMC layer to avoid highmem */
1246                 pdev->dma_mask = 0;
1247
1248         host->max_clk =
1249                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1250         if (host->max_clk == 0) {
1251                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1252                         "frequency.\n", host->slot_descr);
1253                 ret = -ENODEV;
1254                 goto unmap;
1255         }
1256         host->max_clk *= 1000000;
1257
1258         host->timeout_clk =
1259                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1260         if (host->timeout_clk == 0) {
1261                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1262                         "frequency.\n", host->slot_descr);
1263                 ret = -ENODEV;
1264                 goto unmap;
1265         }
1266         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1267                 host->timeout_clk *= 1000;
1268
1269         host->max_block = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1270         if (host->max_block >= 3) {
1271                 printk(KERN_ERR "%s: Invalid maximum block size.\n",
1272                         host->slot_descr);
1273                 ret = -ENODEV;
1274                 goto unmap;
1275         }
1276         host->max_block = 512 << host->max_block;
1277
1278         /*
1279          * Set host parameters.
1280          */
1281         mmc->ops = &sdhci_ops;
1282         mmc->f_min = host->max_clk / 256;
1283         mmc->f_max = host->max_clk;
1284         mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
1285
1286         mmc->ocr_avail = 0;
1287         if (caps & SDHCI_CAN_VDD_330)
1288                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1289         else if (caps & SDHCI_CAN_VDD_300)
1290                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1291         else if (caps & SDHCI_CAN_VDD_180)
1292                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1293
1294         if (mmc->ocr_avail == 0) {
1295                 printk(KERN_ERR "%s: Hardware doesn't report any "
1296                         "support voltages.\n", host->slot_descr);
1297                 ret = -ENODEV;
1298                 goto unmap;
1299         }
1300
1301         spin_lock_init(&host->lock);
1302
1303         /*
1304          * Maximum number of segments. Hardware cannot do scatter lists.
1305          */
1306         if (host->flags & SDHCI_USE_DMA)
1307                 mmc->max_hw_segs = 1;
1308         else
1309                 mmc->max_hw_segs = 16;
1310         mmc->max_phys_segs = 16;
1311
1312         /*
1313          * Maximum number of sectors in one transfer. Limited by DMA boundary
1314          * size (512KiB), which means (512 KiB/512=) 1024 entries.
1315          */
1316         mmc->max_sectors = 1024;
1317
1318         /*
1319          * Maximum segment size. Could be one segment with the maximum number
1320          * of sectors.
1321          */
1322         mmc->max_seg_size = mmc->max_sectors * 512;
1323
1324         /*
1325          * Init tasklets.
1326          */
1327         tasklet_init(&host->card_tasklet,
1328                 sdhci_tasklet_card, (unsigned long)host);
1329         tasklet_init(&host->finish_tasklet,
1330                 sdhci_tasklet_finish, (unsigned long)host);
1331
1332         setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
1333
1334         ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1335                 host->slot_descr, host);
1336         if (ret)
1337                 goto untasklet;
1338
1339         sdhci_init(host);
1340
1341 #ifdef CONFIG_MMC_DEBUG
1342         sdhci_dumpregs(host);
1343 #endif
1344
1345         mmiowb();
1346
1347         mmc_add_host(mmc);
1348
1349         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1350                 host->addr, host->irq,
1351                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1352
1353         return 0;
1354
1355 untasklet:
1356         tasklet_kill(&host->card_tasklet);
1357         tasklet_kill(&host->finish_tasklet);
1358 unmap:
1359         iounmap(host->ioaddr);
1360 release:
1361         pci_release_region(pdev, host->bar);
1362 free:
1363         mmc_free_host(mmc);
1364
1365         return ret;
1366 }
1367
1368 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1369 {
1370         struct sdhci_chip *chip;
1371         struct mmc_host *mmc;
1372         struct sdhci_host *host;
1373
1374         chip = pci_get_drvdata(pdev);
1375         host = chip->hosts[slot];
1376         mmc = host->mmc;
1377
1378         chip->hosts[slot] = NULL;
1379
1380         mmc_remove_host(mmc);
1381
1382         sdhci_reset(host, SDHCI_RESET_ALL);
1383
1384         free_irq(host->irq, host);
1385
1386         del_timer_sync(&host->timer);
1387
1388         tasklet_kill(&host->card_tasklet);
1389         tasklet_kill(&host->finish_tasklet);
1390
1391         iounmap(host->ioaddr);
1392
1393         pci_release_region(pdev, host->bar);
1394
1395         mmc_free_host(mmc);
1396 }
1397
1398 static int __devinit sdhci_probe(struct pci_dev *pdev,
1399         const struct pci_device_id *ent)
1400 {
1401         int ret, i;
1402         u8 slots, rev;
1403         struct sdhci_chip *chip;
1404
1405         BUG_ON(pdev == NULL);
1406         BUG_ON(ent == NULL);
1407
1408         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1409
1410         printk(KERN_INFO DRIVER_NAME
1411                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1412                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1413                 (int)rev);
1414
1415         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1416         if (ret)
1417                 return ret;
1418
1419         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1420         DBG("found %d slot(s)\n", slots);
1421         if (slots == 0)
1422                 return -ENODEV;
1423
1424         ret = pci_enable_device(pdev);
1425         if (ret)
1426                 return ret;
1427
1428         chip = kzalloc(sizeof(struct sdhci_chip) +
1429                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1430         if (!chip) {
1431                 ret = -ENOMEM;
1432                 goto err;
1433         }
1434
1435         chip->pdev = pdev;
1436         chip->quirks = ent->driver_data;
1437
1438         if (debug_quirks)
1439                 chip->quirks = debug_quirks;
1440
1441         chip->num_slots = slots;
1442         pci_set_drvdata(pdev, chip);
1443
1444         for (i = 0;i < slots;i++) {
1445                 ret = sdhci_probe_slot(pdev, i);
1446                 if (ret) {
1447                         for (i--;i >= 0;i--)
1448                                 sdhci_remove_slot(pdev, i);
1449                         goto free;
1450                 }
1451         }
1452
1453         return 0;
1454
1455 free:
1456         pci_set_drvdata(pdev, NULL);
1457         kfree(chip);
1458
1459 err:
1460         pci_disable_device(pdev);
1461         return ret;
1462 }
1463
1464 static void __devexit sdhci_remove(struct pci_dev *pdev)
1465 {
1466         int i;
1467         struct sdhci_chip *chip;
1468
1469         chip = pci_get_drvdata(pdev);
1470
1471         if (chip) {
1472                 for (i = 0;i < chip->num_slots;i++)
1473                         sdhci_remove_slot(pdev, i);
1474
1475                 pci_set_drvdata(pdev, NULL);
1476
1477                 kfree(chip);
1478         }
1479
1480         pci_disable_device(pdev);
1481 }
1482
1483 static struct pci_driver sdhci_driver = {
1484         .name =         DRIVER_NAME,
1485         .id_table =     pci_ids,
1486         .probe =        sdhci_probe,
1487         .remove =       __devexit_p(sdhci_remove),
1488         .suspend =      sdhci_suspend,
1489         .resume =       sdhci_resume,
1490 };
1491
1492 /*****************************************************************************\
1493  *                                                                           *
1494  * Driver init/exit                                                          *
1495  *                                                                           *
1496 \*****************************************************************************/
1497
1498 static int __init sdhci_drv_init(void)
1499 {
1500         printk(KERN_INFO DRIVER_NAME
1501                 ": Secure Digital Host Controller Interface driver, "
1502                 DRIVER_VERSION "\n");
1503         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1504
1505         return pci_register_driver(&sdhci_driver);
1506 }
1507
1508 static void __exit sdhci_drv_exit(void)
1509 {
1510         DBG("Exiting\n");
1511
1512         pci_unregister_driver(&sdhci_driver);
1513 }
1514
1515 module_init(sdhci_drv_init);
1516 module_exit(sdhci_drv_exit);
1517
1518 module_param(debug_nodma, uint, 0444);
1519 module_param(debug_forcedma, uint, 0444);
1520 module_param(debug_quirks, uint, 0444);
1521
1522 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1523 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1524 MODULE_VERSION(DRIVER_VERSION);
1525 MODULE_LICENSE("GPL");
1526
1527 MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
1528 MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
1529 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");