Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[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 version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #include <linux/delay.h>
12 #include <linux/highmem.h>
13 #include <linux/pci.h>
14 #include <linux/dma-mapping.h>
15
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/protocol.h>
18
19 #include <asm/scatterlist.h>
20
21 #include "sdhci.h"
22
23 #define DRIVER_NAME "sdhci"
24 #define DRIVER_VERSION "0.12"
25
26 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
27
28 #define DBG(f, x...) \
29         pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
30
31 static unsigned int debug_nodma = 0;
32 static unsigned int debug_forcedma = 0;
33 static unsigned int debug_quirks = 0;
34
35 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET                  (1<<0)
36 #define SDHCI_QUIRK_FORCE_DMA                           (1<<1)
37
38 static const struct pci_device_id pci_ids[] __devinitdata = {
39         {
40                 .vendor         = PCI_VENDOR_ID_RICOH,
41                 .device         = PCI_DEVICE_ID_RICOH_R5C822,
42                 .subvendor      = PCI_VENDOR_ID_IBM,
43                 .subdevice      = PCI_ANY_ID,
44                 .driver_data    = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
45                                   SDHCI_QUIRK_FORCE_DMA,
46         },
47
48         {
49                 .vendor         = PCI_VENDOR_ID_RICOH,
50                 .device         = PCI_DEVICE_ID_RICOH_R5C822,
51                 .subvendor      = PCI_ANY_ID,
52                 .subdevice      = PCI_ANY_ID,
53                 .driver_data    = SDHCI_QUIRK_FORCE_DMA,
54         },
55
56         {
57                 .vendor         = PCI_VENDOR_ID_TI,
58                 .device         = PCI_DEVICE_ID_TI_XX21_XX11_SD,
59                 .subvendor      = PCI_ANY_ID,
60                 .subdevice      = PCI_ANY_ID,
61                 .driver_data    = SDHCI_QUIRK_FORCE_DMA,
62         },
63
64         {       /* Generic SD host controller */
65                 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
66         },
67
68         { /* end: all zeroes */ },
69 };
70
71 MODULE_DEVICE_TABLE(pci, pci_ids);
72
73 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
74 static void sdhci_finish_data(struct sdhci_host *);
75
76 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
77 static void sdhci_finish_command(struct sdhci_host *);
78
79 static void sdhci_dumpregs(struct sdhci_host *host)
80 {
81         printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
82
83         printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version:  0x%08x\n",
84                 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
85                 readw(host->ioaddr + SDHCI_HOST_VERSION));
86         printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt:  0x%08x\n",
87                 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
88                 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
89         printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
90                 readl(host->ioaddr + SDHCI_ARGUMENT),
91                 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
92         printk(KERN_DEBUG DRIVER_NAME ": Present:  0x%08x | Host ctl: 0x%08x\n",
93                 readl(host->ioaddr + SDHCI_PRESENT_STATE),
94                 readb(host->ioaddr + SDHCI_HOST_CONTROL));
95         printk(KERN_DEBUG DRIVER_NAME ": Power:    0x%08x | Blk gap:  0x%08x\n",
96                 readb(host->ioaddr + SDHCI_POWER_CONTROL),
97                 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
98         printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
99                 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
100                 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
101         printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
102                 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
103                 readl(host->ioaddr + SDHCI_INT_STATUS));
104         printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
105                 readl(host->ioaddr + SDHCI_INT_ENABLE),
106                 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
107         printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
108                 readw(host->ioaddr + SDHCI_ACMD12_ERR),
109                 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
110         printk(KERN_DEBUG DRIVER_NAME ": Caps:     0x%08x | Max curr: 0x%08x\n",
111                 readl(host->ioaddr + SDHCI_CAPABILITIES),
112                 readl(host->ioaddr + SDHCI_MAX_CURRENT));
113
114         printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
115 }
116
117 /*****************************************************************************\
118  *                                                                           *
119  * Low level functions                                                       *
120  *                                                                           *
121 \*****************************************************************************/
122
123 static void sdhci_reset(struct sdhci_host *host, u8 mask)
124 {
125         unsigned long timeout;
126
127         writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
128
129         if (mask & SDHCI_RESET_ALL)
130                 host->clock = 0;
131
132         /* Wait max 100 ms */
133         timeout = 100;
134
135         /* hw clears the bit when it's done */
136         while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
137                 if (timeout == 0) {
138                         printk(KERN_ERR "%s: Reset 0x%x never completed. "
139                                 "Please report this to " BUGMAIL ".\n",
140                                 mmc_hostname(host->mmc), (int)mask);
141                         sdhci_dumpregs(host);
142                         return;
143                 }
144                 timeout--;
145                 mdelay(1);
146         }
147 }
148
149 static void sdhci_init(struct sdhci_host *host)
150 {
151         u32 intmask;
152
153         sdhci_reset(host, SDHCI_RESET_ALL);
154
155         intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
156                 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
157                 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
158                 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
159                 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
160                 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
161
162         writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
163         writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
164 }
165
166 static void sdhci_activate_led(struct sdhci_host *host)
167 {
168         u8 ctrl;
169
170         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
171         ctrl |= SDHCI_CTRL_LED;
172         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
173 }
174
175 static void sdhci_deactivate_led(struct sdhci_host *host)
176 {
177         u8 ctrl;
178
179         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
180         ctrl &= ~SDHCI_CTRL_LED;
181         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
182 }
183
184 /*****************************************************************************\
185  *                                                                           *
186  * Core functions                                                            *
187  *                                                                           *
188 \*****************************************************************************/
189
190 static inline char* sdhci_kmap_sg(struct sdhci_host* host)
191 {
192         host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ);
193         return host->mapped_sg + host->cur_sg->offset;
194 }
195
196 static inline void sdhci_kunmap_sg(struct sdhci_host* host)
197 {
198         kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
199 }
200
201 static inline int sdhci_next_sg(struct sdhci_host* host)
202 {
203         /*
204          * Skip to next SG entry.
205          */
206         host->cur_sg++;
207         host->num_sg--;
208
209         /*
210          * Any entries left?
211          */
212         if (host->num_sg > 0) {
213                 host->offset = 0;
214                 host->remain = host->cur_sg->length;
215         }
216
217         return host->num_sg;
218 }
219
220 static void sdhci_read_block_pio(struct sdhci_host *host)
221 {
222         int blksize, chunk_remain;
223         u32 data;
224         char *buffer;
225         int size;
226
227         DBG("PIO reading\n");
228
229         blksize = host->data->blksz;
230         chunk_remain = 0;
231         data = 0;
232
233         buffer = sdhci_kmap_sg(host) + host->offset;
234
235         while (blksize) {
236                 if (chunk_remain == 0) {
237                         data = readl(host->ioaddr + SDHCI_BUFFER);
238                         chunk_remain = min(blksize, 4);
239                 }
240
241                 size = min(host->size, host->remain);
242                 size = min(size, chunk_remain);
243
244                 chunk_remain -= size;
245                 blksize -= size;
246                 host->offset += size;
247                 host->remain -= size;
248                 host->size -= size;
249                 while (size) {
250                         *buffer = data & 0xFF;
251                         buffer++;
252                         data >>= 8;
253                         size--;
254                 }
255
256                 if (host->remain == 0) {
257                         sdhci_kunmap_sg(host);
258                         if (sdhci_next_sg(host) == 0) {
259                                 BUG_ON(blksize != 0);
260                                 return;
261                         }
262                         buffer = sdhci_kmap_sg(host);
263                 }
264         }
265
266         sdhci_kunmap_sg(host);
267 }
268
269 static void sdhci_write_block_pio(struct sdhci_host *host)
270 {
271         int blksize, chunk_remain;
272         u32 data;
273         char *buffer;
274         int bytes, size;
275
276         DBG("PIO writing\n");
277
278         blksize = host->data->blksz;
279         chunk_remain = 4;
280         data = 0;
281
282         bytes = 0;
283         buffer = sdhci_kmap_sg(host) + host->offset;
284
285         while (blksize) {
286                 size = min(host->size, host->remain);
287                 size = min(size, chunk_remain);
288
289                 chunk_remain -= size;
290                 blksize -= size;
291                 host->offset += size;
292                 host->remain -= size;
293                 host->size -= size;
294                 while (size) {
295                         data >>= 8;
296                         data |= (u32)*buffer << 24;
297                         buffer++;
298                         size--;
299                 }
300
301                 if (chunk_remain == 0) {
302                         writel(data, host->ioaddr + SDHCI_BUFFER);
303                         chunk_remain = min(blksize, 4);
304                 }
305
306                 if (host->remain == 0) {
307                         sdhci_kunmap_sg(host);
308                         if (sdhci_next_sg(host) == 0) {
309                                 BUG_ON(blksize != 0);
310                                 return;
311                         }
312                         buffer = sdhci_kmap_sg(host);
313                 }
314         }
315
316         sdhci_kunmap_sg(host);
317 }
318
319 static void sdhci_transfer_pio(struct sdhci_host *host)
320 {
321         u32 mask;
322
323         BUG_ON(!host->data);
324
325         if (host->size == 0)
326                 return;
327
328         if (host->data->flags & MMC_DATA_READ)
329                 mask = SDHCI_DATA_AVAILABLE;
330         else
331                 mask = SDHCI_SPACE_AVAILABLE;
332
333         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
334                 if (host->data->flags & MMC_DATA_READ)
335                         sdhci_read_block_pio(host);
336                 else
337                         sdhci_write_block_pio(host);
338
339                 if (host->size == 0)
340                         break;
341
342                 BUG_ON(host->num_sg == 0);
343         }
344
345         DBG("PIO transfer complete.\n");
346 }
347
348 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
349 {
350         u8 count;
351         unsigned target_timeout, current_timeout;
352
353         WARN_ON(host->data);
354
355         if (data == NULL)
356                 return;
357
358         DBG("blksz %04x blks %04x flags %08x\n",
359                 data->blksz, data->blocks, data->flags);
360         DBG("tsac %d ms nsac %d clk\n",
361                 data->timeout_ns / 1000000, data->timeout_clks);
362
363         /* Sanity checks */
364         BUG_ON(data->blksz * data->blocks > 524288);
365         BUG_ON(data->blksz > host->max_block);
366         BUG_ON(data->blocks > 65535);
367
368         /* timeout in us */
369         target_timeout = data->timeout_ns / 1000 +
370                 data->timeout_clks / host->clock;
371
372         /*
373          * Figure out needed cycles.
374          * We do this in steps in order to fit inside a 32 bit int.
375          * The first step is the minimum timeout, which will have a
376          * minimum resolution of 6 bits:
377          * (1) 2^13*1000 > 2^22,
378          * (2) host->timeout_clk < 2^16
379          *     =>
380          *     (1) / (2) > 2^6
381          */
382         count = 0;
383         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
384         while (current_timeout < target_timeout) {
385                 count++;
386                 current_timeout <<= 1;
387                 if (count >= 0xF)
388                         break;
389         }
390
391         if (count >= 0xF) {
392                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
393                         mmc_hostname(host->mmc));
394                 count = 0xE;
395         }
396
397         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
398
399         if (host->flags & SDHCI_USE_DMA) {
400                 int count;
401
402                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
403                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
404                 BUG_ON(count != 1);
405
406                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
407         } else {
408                 host->size = data->blksz * data->blocks;
409
410                 host->cur_sg = data->sg;
411                 host->num_sg = data->sg_len;
412
413                 host->offset = 0;
414                 host->remain = host->cur_sg->length;
415         }
416
417         /* We do not handle DMA boundaries, so set it to max (512 KiB) */
418         writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
419                 host->ioaddr + SDHCI_BLOCK_SIZE);
420         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
421 }
422
423 static void sdhci_set_transfer_mode(struct sdhci_host *host,
424         struct mmc_data *data)
425 {
426         u16 mode;
427
428         WARN_ON(host->data);
429
430         if (data == NULL)
431                 return;
432
433         mode = SDHCI_TRNS_BLK_CNT_EN;
434         if (data->blocks > 1)
435                 mode |= SDHCI_TRNS_MULTI;
436         if (data->flags & MMC_DATA_READ)
437                 mode |= SDHCI_TRNS_READ;
438         if (host->flags & SDHCI_USE_DMA)
439                 mode |= SDHCI_TRNS_DMA;
440
441         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
442 }
443
444 static void sdhci_finish_data(struct sdhci_host *host)
445 {
446         struct mmc_data *data;
447         u16 blocks;
448
449         BUG_ON(!host->data);
450
451         data = host->data;
452         host->data = NULL;
453
454         if (host->flags & SDHCI_USE_DMA) {
455                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
456                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
457         }
458
459         /*
460          * Controller doesn't count down when in single block mode.
461          */
462         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
463                 blocks = 0;
464         else
465                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
466         data->bytes_xfered = data->blksz * (data->blocks - blocks);
467
468         if ((data->error == MMC_ERR_NONE) && blocks) {
469                 printk(KERN_ERR "%s: Controller signalled completion even "
470                         "though there were blocks left. Please report this "
471                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
472                 data->error = MMC_ERR_FAILED;
473         } else if (host->size != 0) {
474                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
475                         "Please report this to " BUGMAIL ".\n",
476                         mmc_hostname(host->mmc), host->size);
477                 data->error = MMC_ERR_FAILED;
478         }
479
480         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
481
482         if (data->stop) {
483                 /*
484                  * The controller needs a reset of internal state machines
485                  * upon error conditions.
486                  */
487                 if (data->error != MMC_ERR_NONE) {
488                         sdhci_reset(host, SDHCI_RESET_CMD);
489                         sdhci_reset(host, SDHCI_RESET_DATA);
490                 }
491
492                 sdhci_send_command(host, data->stop);
493         } else
494                 tasklet_schedule(&host->finish_tasklet);
495 }
496
497 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
498 {
499         int flags;
500         u32 mask;
501         unsigned long timeout;
502
503         WARN_ON(host->cmd);
504
505         DBG("Sending cmd (%x)\n", cmd->opcode);
506
507         /* Wait max 10 ms */
508         timeout = 10;
509
510         mask = SDHCI_CMD_INHIBIT;
511         if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
512                 mask |= SDHCI_DATA_INHIBIT;
513
514         /* We shouldn't wait for data inihibit for stop commands, even
515            though they might use busy signaling */
516         if (host->mrq->data && (cmd == host->mrq->data->stop))
517                 mask &= ~SDHCI_DATA_INHIBIT;
518
519         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
520                 if (timeout == 0) {
521                         printk(KERN_ERR "%s: Controller never released "
522                                 "inhibit bit(s). Please report this to "
523                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
524                         sdhci_dumpregs(host);
525                         cmd->error = MMC_ERR_FAILED;
526                         tasklet_schedule(&host->finish_tasklet);
527                         return;
528                 }
529                 timeout--;
530                 mdelay(1);
531         }
532
533         mod_timer(&host->timer, jiffies + 10 * HZ);
534
535         host->cmd = cmd;
536
537         sdhci_prepare_data(host, cmd->data);
538
539         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
540
541         sdhci_set_transfer_mode(host, cmd->data);
542
543         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
544                 printk(KERN_ERR "%s: Unsupported response type! "
545                         "Please report this to " BUGMAIL ".\n",
546                         mmc_hostname(host->mmc));
547                 cmd->error = MMC_ERR_INVALID;
548                 tasklet_schedule(&host->finish_tasklet);
549                 return;
550         }
551
552         if (!(cmd->flags & MMC_RSP_PRESENT))
553                 flags = SDHCI_CMD_RESP_NONE;
554         else if (cmd->flags & MMC_RSP_136)
555                 flags = SDHCI_CMD_RESP_LONG;
556         else if (cmd->flags & MMC_RSP_BUSY)
557                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
558         else
559                 flags = SDHCI_CMD_RESP_SHORT;
560
561         if (cmd->flags & MMC_RSP_CRC)
562                 flags |= SDHCI_CMD_CRC;
563         if (cmd->flags & MMC_RSP_OPCODE)
564                 flags |= SDHCI_CMD_INDEX;
565         if (cmd->data)
566                 flags |= SDHCI_CMD_DATA;
567
568         writew(SDHCI_MAKE_CMD(cmd->opcode, flags),
569                 host->ioaddr + SDHCI_COMMAND);
570 }
571
572 static void sdhci_finish_command(struct sdhci_host *host)
573 {
574         int i;
575
576         BUG_ON(host->cmd == NULL);
577
578         if (host->cmd->flags & MMC_RSP_PRESENT) {
579                 if (host->cmd->flags & MMC_RSP_136) {
580                         /* CRC is stripped so we need to do some shifting. */
581                         for (i = 0;i < 4;i++) {
582                                 host->cmd->resp[i] = readl(host->ioaddr +
583                                         SDHCI_RESPONSE + (3-i)*4) << 8;
584                                 if (i != 3)
585                                         host->cmd->resp[i] |=
586                                                 readb(host->ioaddr +
587                                                 SDHCI_RESPONSE + (3-i)*4-1);
588                         }
589                 } else {
590                         host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
591                 }
592         }
593
594         host->cmd->error = MMC_ERR_NONE;
595
596         DBG("Ending cmd (%x)\n", host->cmd->opcode);
597
598         if (host->cmd->data)
599                 host->data = host->cmd->data;
600         else
601                 tasklet_schedule(&host->finish_tasklet);
602
603         host->cmd = NULL;
604 }
605
606 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
607 {
608         int div;
609         u16 clk;
610         unsigned long timeout;
611
612         if (clock == host->clock)
613                 return;
614
615         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
616
617         if (clock == 0)
618                 goto out;
619
620         for (div = 1;div < 256;div *= 2) {
621                 if ((host->max_clk / div) <= clock)
622                         break;
623         }
624         div >>= 1;
625
626         clk = div << SDHCI_DIVIDER_SHIFT;
627         clk |= SDHCI_CLOCK_INT_EN;
628         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
629
630         /* Wait max 10 ms */
631         timeout = 10;
632         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
633                 & SDHCI_CLOCK_INT_STABLE)) {
634                 if (timeout == 0) {
635                         printk(KERN_ERR "%s: Internal clock never stabilised. "
636                                 "Please report this to " BUGMAIL ".\n",
637                                 mmc_hostname(host->mmc));
638                         sdhci_dumpregs(host);
639                         return;
640                 }
641                 timeout--;
642                 mdelay(1);
643         }
644
645         clk |= SDHCI_CLOCK_CARD_EN;
646         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
647
648 out:
649         host->clock = clock;
650 }
651
652 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
653 {
654         u8 pwr;
655
656         if (host->power == power)
657                 return;
658
659         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
660
661         if (power == (unsigned short)-1)
662                 goto out;
663
664         pwr = SDHCI_POWER_ON;
665
666         switch (power) {
667         case MMC_VDD_170:
668         case MMC_VDD_180:
669         case MMC_VDD_190:
670                 pwr |= SDHCI_POWER_180;
671                 break;
672         case MMC_VDD_290:
673         case MMC_VDD_300:
674         case MMC_VDD_310:
675                 pwr |= SDHCI_POWER_300;
676                 break;
677         case MMC_VDD_320:
678         case MMC_VDD_330:
679         case MMC_VDD_340:
680                 pwr |= SDHCI_POWER_330;
681                 break;
682         default:
683                 BUG();
684         }
685
686         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
687
688 out:
689         host->power = power;
690 }
691
692 /*****************************************************************************\
693  *                                                                           *
694  * MMC callbacks                                                             *
695  *                                                                           *
696 \*****************************************************************************/
697
698 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
699 {
700         struct sdhci_host *host;
701         unsigned long flags;
702
703         host = mmc_priv(mmc);
704
705         spin_lock_irqsave(&host->lock, flags);
706
707         WARN_ON(host->mrq != NULL);
708
709         sdhci_activate_led(host);
710
711         host->mrq = mrq;
712
713         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
714                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
715                 tasklet_schedule(&host->finish_tasklet);
716         } else
717                 sdhci_send_command(host, mrq->cmd);
718
719         spin_unlock_irqrestore(&host->lock, flags);
720 }
721
722 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
723 {
724         struct sdhci_host *host;
725         unsigned long flags;
726         u8 ctrl;
727
728         host = mmc_priv(mmc);
729
730         spin_lock_irqsave(&host->lock, flags);
731
732         /*
733          * Reset the chip on each power off.
734          * Should clear out any weird states.
735          */
736         if (ios->power_mode == MMC_POWER_OFF) {
737                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
738                 sdhci_init(host);
739         }
740
741         sdhci_set_clock(host, ios->clock);
742
743         if (ios->power_mode == MMC_POWER_OFF)
744                 sdhci_set_power(host, -1);
745         else
746                 sdhci_set_power(host, ios->vdd);
747
748         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
749         if (ios->bus_width == MMC_BUS_WIDTH_4)
750                 ctrl |= SDHCI_CTRL_4BITBUS;
751         else
752                 ctrl &= ~SDHCI_CTRL_4BITBUS;
753         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
754
755         spin_unlock_irqrestore(&host->lock, flags);
756 }
757
758 static int sdhci_get_ro(struct mmc_host *mmc)
759 {
760         struct sdhci_host *host;
761         unsigned long flags;
762         int present;
763
764         host = mmc_priv(mmc);
765
766         spin_lock_irqsave(&host->lock, flags);
767
768         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
769
770         spin_unlock_irqrestore(&host->lock, flags);
771
772         return !(present & SDHCI_WRITE_PROTECT);
773 }
774
775 static struct mmc_host_ops sdhci_ops = {
776         .request        = sdhci_request,
777         .set_ios        = sdhci_set_ios,
778         .get_ro         = sdhci_get_ro,
779 };
780
781 /*****************************************************************************\
782  *                                                                           *
783  * Tasklets                                                                  *
784  *                                                                           *
785 \*****************************************************************************/
786
787 static void sdhci_tasklet_card(unsigned long param)
788 {
789         struct sdhci_host *host;
790         unsigned long flags;
791
792         host = (struct sdhci_host*)param;
793
794         spin_lock_irqsave(&host->lock, flags);
795
796         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
797                 if (host->mrq) {
798                         printk(KERN_ERR "%s: Card removed during transfer!\n",
799                                 mmc_hostname(host->mmc));
800                         printk(KERN_ERR "%s: Resetting controller.\n",
801                                 mmc_hostname(host->mmc));
802
803                         sdhci_reset(host, SDHCI_RESET_CMD);
804                         sdhci_reset(host, SDHCI_RESET_DATA);
805
806                         host->mrq->cmd->error = MMC_ERR_FAILED;
807                         tasklet_schedule(&host->finish_tasklet);
808                 }
809         }
810
811         spin_unlock_irqrestore(&host->lock, flags);
812
813         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
814 }
815
816 static void sdhci_tasklet_finish(unsigned long param)
817 {
818         struct sdhci_host *host;
819         unsigned long flags;
820         struct mmc_request *mrq;
821
822         host = (struct sdhci_host*)param;
823
824         spin_lock_irqsave(&host->lock, flags);
825
826         del_timer(&host->timer);
827
828         mrq = host->mrq;
829
830         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
831
832         /*
833          * The controller needs a reset of internal state machines
834          * upon error conditions.
835          */
836         if ((mrq->cmd->error != MMC_ERR_NONE) ||
837                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
838                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
839
840                 /* Some controllers need this kick or reset won't work here */
841                 if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
842                         unsigned int clock;
843
844                         /* This is to force an update */
845                         clock = host->clock;
846                         host->clock = 0;
847                         sdhci_set_clock(host, clock);
848                 }
849
850                 /* Spec says we should do both at the same time, but Ricoh
851                    controllers do not like that. */
852                 sdhci_reset(host, SDHCI_RESET_CMD);
853                 sdhci_reset(host, SDHCI_RESET_DATA);
854         }
855
856         host->mrq = NULL;
857         host->cmd = NULL;
858         host->data = NULL;
859
860         sdhci_deactivate_led(host);
861
862         spin_unlock_irqrestore(&host->lock, flags);
863
864         mmc_request_done(host->mmc, mrq);
865 }
866
867 static void sdhci_timeout_timer(unsigned long data)
868 {
869         struct sdhci_host *host;
870         unsigned long flags;
871
872         host = (struct sdhci_host*)data;
873
874         spin_lock_irqsave(&host->lock, flags);
875
876         if (host->mrq) {
877                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
878                         "Please report this to " BUGMAIL ".\n",
879                         mmc_hostname(host->mmc));
880                 sdhci_dumpregs(host);
881
882                 if (host->data) {
883                         host->data->error = MMC_ERR_TIMEOUT;
884                         sdhci_finish_data(host);
885                 } else {
886                         if (host->cmd)
887                                 host->cmd->error = MMC_ERR_TIMEOUT;
888                         else
889                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
890
891                         tasklet_schedule(&host->finish_tasklet);
892                 }
893         }
894
895         spin_unlock_irqrestore(&host->lock, flags);
896 }
897
898 /*****************************************************************************\
899  *                                                                           *
900  * Interrupt handling                                                        *
901  *                                                                           *
902 \*****************************************************************************/
903
904 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
905 {
906         BUG_ON(intmask == 0);
907
908         if (!host->cmd) {
909                 printk(KERN_ERR "%s: Got command interrupt even though no "
910                         "command operation was in progress.\n",
911                         mmc_hostname(host->mmc));
912                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
913                         mmc_hostname(host->mmc));
914                 sdhci_dumpregs(host);
915                 return;
916         }
917
918         if (intmask & SDHCI_INT_RESPONSE)
919                 sdhci_finish_command(host);
920         else {
921                 if (intmask & SDHCI_INT_TIMEOUT)
922                         host->cmd->error = MMC_ERR_TIMEOUT;
923                 else if (intmask & SDHCI_INT_CRC)
924                         host->cmd->error = MMC_ERR_BADCRC;
925                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
926                         host->cmd->error = MMC_ERR_FAILED;
927                 else
928                         host->cmd->error = MMC_ERR_INVALID;
929
930                 tasklet_schedule(&host->finish_tasklet);
931         }
932 }
933
934 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
935 {
936         BUG_ON(intmask == 0);
937
938         if (!host->data) {
939                 /*
940                  * A data end interrupt is sent together with the response
941                  * for the stop command.
942                  */
943                 if (intmask & SDHCI_INT_DATA_END)
944                         return;
945
946                 printk(KERN_ERR "%s: Got data interrupt even though no "
947                         "data operation was in progress.\n",
948                         mmc_hostname(host->mmc));
949                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
950                         mmc_hostname(host->mmc));
951                 sdhci_dumpregs(host);
952
953                 return;
954         }
955
956         if (intmask & SDHCI_INT_DATA_TIMEOUT)
957                 host->data->error = MMC_ERR_TIMEOUT;
958         else if (intmask & SDHCI_INT_DATA_CRC)
959                 host->data->error = MMC_ERR_BADCRC;
960         else if (intmask & SDHCI_INT_DATA_END_BIT)
961                 host->data->error = MMC_ERR_FAILED;
962
963         if (host->data->error != MMC_ERR_NONE)
964                 sdhci_finish_data(host);
965         else {
966                 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
967                         sdhci_transfer_pio(host);
968
969                 if (intmask & SDHCI_INT_DATA_END)
970                         sdhci_finish_data(host);
971         }
972 }
973
974 static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
975 {
976         irqreturn_t result;
977         struct sdhci_host* host = dev_id;
978         u32 intmask;
979
980         spin_lock(&host->lock);
981
982         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
983
984         if (!intmask) {
985                 result = IRQ_NONE;
986                 goto out;
987         }
988
989         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
990
991         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
992                 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
993                         host->ioaddr + SDHCI_INT_STATUS);
994                 tasklet_schedule(&host->card_tasklet);
995         }
996
997         intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
998
999         if (intmask & SDHCI_INT_CMD_MASK) {
1000                 writel(intmask & SDHCI_INT_CMD_MASK,
1001                         host->ioaddr + SDHCI_INT_STATUS);
1002                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
1003         }
1004
1005         if (intmask & SDHCI_INT_DATA_MASK) {
1006                 writel(intmask & SDHCI_INT_DATA_MASK,
1007                         host->ioaddr + SDHCI_INT_STATUS);
1008                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
1009         }
1010
1011         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1012
1013         if (intmask & SDHCI_INT_BUS_POWER) {
1014                 printk(KERN_ERR "%s: Card is consuming too much power!\n",
1015                         mmc_hostname(host->mmc));
1016                 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
1017         }
1018
1019         intmask &= SDHCI_INT_BUS_POWER;
1020
1021         if (intmask) {
1022                 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
1023                         "report this to " BUGMAIL ".\n",
1024                         mmc_hostname(host->mmc), intmask);
1025                 sdhci_dumpregs(host);
1026
1027                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
1028         }
1029
1030         result = IRQ_HANDLED;
1031
1032 out:
1033         spin_unlock(&host->lock);
1034
1035         return result;
1036 }
1037
1038 /*****************************************************************************\
1039  *                                                                           *
1040  * Suspend/resume                                                            *
1041  *                                                                           *
1042 \*****************************************************************************/
1043
1044 #ifdef CONFIG_PM
1045
1046 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
1047 {
1048         struct sdhci_chip *chip;
1049         int i, ret;
1050
1051         chip = pci_get_drvdata(pdev);
1052         if (!chip)
1053                 return 0;
1054
1055         DBG("Suspending...\n");
1056
1057         for (i = 0;i < chip->num_slots;i++) {
1058                 if (!chip->hosts[i])
1059                         continue;
1060                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1061                 if (ret) {
1062                         for (i--;i >= 0;i--)
1063                                 mmc_resume_host(chip->hosts[i]->mmc);
1064                         return ret;
1065                 }
1066         }
1067
1068         pci_save_state(pdev);
1069         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1070         pci_disable_device(pdev);
1071         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1072
1073         return 0;
1074 }
1075
1076 static int sdhci_resume (struct pci_dev *pdev)
1077 {
1078         struct sdhci_chip *chip;
1079         int i, ret;
1080
1081         chip = pci_get_drvdata(pdev);
1082         if (!chip)
1083                 return 0;
1084
1085         DBG("Resuming...\n");
1086
1087         pci_set_power_state(pdev, PCI_D0);
1088         pci_restore_state(pdev);
1089         pci_enable_device(pdev);
1090
1091         for (i = 0;i < chip->num_slots;i++) {
1092                 if (!chip->hosts[i])
1093                         continue;
1094                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1095                         pci_set_master(pdev);
1096                 sdhci_init(chip->hosts[i]);
1097                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1098                 if (ret)
1099                         return ret;
1100         }
1101
1102         return 0;
1103 }
1104
1105 #else /* CONFIG_PM */
1106
1107 #define sdhci_suspend NULL
1108 #define sdhci_resume NULL
1109
1110 #endif /* CONFIG_PM */
1111
1112 /*****************************************************************************\
1113  *                                                                           *
1114  * Device probing/removal                                                    *
1115  *                                                                           *
1116 \*****************************************************************************/
1117
1118 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1119 {
1120         int ret;
1121         unsigned int version;
1122         struct sdhci_chip *chip;
1123         struct mmc_host *mmc;
1124         struct sdhci_host *host;
1125
1126         u8 first_bar;
1127         unsigned int caps;
1128
1129         chip = pci_get_drvdata(pdev);
1130         BUG_ON(!chip);
1131
1132         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1133         if (ret)
1134                 return ret;
1135
1136         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1137
1138         if (first_bar > 5) {
1139                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1140                 return -ENODEV;
1141         }
1142
1143         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1144                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1145                 return -ENODEV;
1146         }
1147
1148         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1149                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1150                 return -ENODEV;
1151         }
1152
1153         if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1154                 printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n");
1155                 return -ENODEV;
1156         }
1157
1158         if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1159                 printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n");
1160                 return -ENODEV;
1161         }
1162
1163         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1164         if (!mmc)
1165                 return -ENOMEM;
1166
1167         host = mmc_priv(mmc);
1168         host->mmc = mmc;
1169
1170         host->bar = first_bar + slot;
1171
1172         host->addr = pci_resource_start(pdev, host->bar);
1173         host->irq = pdev->irq;
1174
1175         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1176
1177         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1178
1179         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1180         if (ret)
1181                 goto free;
1182
1183         host->ioaddr = ioremap_nocache(host->addr,
1184                 pci_resource_len(pdev, host->bar));
1185         if (!host->ioaddr) {
1186                 ret = -ENOMEM;
1187                 goto release;
1188         }
1189
1190         sdhci_reset(host, SDHCI_RESET_ALL);
1191
1192         version = readw(host->ioaddr + SDHCI_HOST_VERSION);
1193         version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
1194         if (version != 0) {
1195                 printk(KERN_ERR "%s: Unknown controller version (%d). "
1196                         "You may experience problems.\n", host->slot_descr,
1197                         version);
1198         }
1199
1200         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1201
1202         if (debug_nodma)
1203                 DBG("DMA forced off\n");
1204         else if (debug_forcedma) {
1205                 DBG("DMA forced on\n");
1206                 host->flags |= SDHCI_USE_DMA;
1207         } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
1208                 host->flags |= SDHCI_USE_DMA;
1209         else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
1210                 DBG("Controller doesn't have DMA interface\n");
1211         else if (!(caps & SDHCI_CAN_DO_DMA))
1212                 DBG("Controller doesn't have DMA capability\n");
1213         else
1214                 host->flags |= SDHCI_USE_DMA;
1215
1216         if (host->flags & SDHCI_USE_DMA) {
1217                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1218                         printk(KERN_WARNING "%s: No suitable DMA available. "
1219                                 "Falling back to PIO.\n", host->slot_descr);
1220                         host->flags &= ~SDHCI_USE_DMA;
1221                 }
1222         }
1223
1224         if (host->flags & SDHCI_USE_DMA)
1225                 pci_set_master(pdev);
1226         else /* XXX: Hack to get MMC layer to avoid highmem */
1227                 pdev->dma_mask = 0;
1228
1229         host->max_clk =
1230                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1231         if (host->max_clk == 0) {
1232                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1233                         "frequency.\n", host->slot_descr);
1234                 ret = -ENODEV;
1235                 goto unmap;
1236         }
1237         host->max_clk *= 1000000;
1238
1239         host->timeout_clk =
1240                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1241         if (host->timeout_clk == 0) {
1242                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1243                         "frequency.\n", host->slot_descr);
1244                 ret = -ENODEV;
1245                 goto unmap;
1246         }
1247         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1248                 host->timeout_clk *= 1000;
1249
1250         host->max_block = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1251         if (host->max_block >= 3) {
1252                 printk(KERN_ERR "%s: Invalid maximum block size.\n",
1253                         host->slot_descr);
1254                 ret = -ENODEV;
1255                 goto unmap;
1256         }
1257         host->max_block = 512 << host->max_block;
1258
1259         /*
1260          * Set host parameters.
1261          */
1262         mmc->ops = &sdhci_ops;
1263         mmc->f_min = host->max_clk / 256;
1264         mmc->f_max = host->max_clk;
1265         mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
1266
1267         mmc->ocr_avail = 0;
1268         if (caps & SDHCI_CAN_VDD_330)
1269                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1270         else if (caps & SDHCI_CAN_VDD_300)
1271                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1272         else if (caps & SDHCI_CAN_VDD_180)
1273                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1274
1275         if (mmc->ocr_avail == 0) {
1276                 printk(KERN_ERR "%s: Hardware doesn't report any "
1277                         "support voltages.\n", host->slot_descr);
1278                 ret = -ENODEV;
1279                 goto unmap;
1280         }
1281
1282         spin_lock_init(&host->lock);
1283
1284         /*
1285          * Maximum number of segments. Hardware cannot do scatter lists.
1286          */
1287         if (host->flags & SDHCI_USE_DMA)
1288                 mmc->max_hw_segs = 1;
1289         else
1290                 mmc->max_hw_segs = 16;
1291         mmc->max_phys_segs = 16;
1292
1293         /*
1294          * Maximum number of sectors in one transfer. Limited by DMA boundary
1295          * size (512KiB), which means (512 KiB/512=) 1024 entries.
1296          */
1297         mmc->max_sectors = 1024;
1298
1299         /*
1300          * Maximum segment size. Could be one segment with the maximum number
1301          * of sectors.
1302          */
1303         mmc->max_seg_size = mmc->max_sectors * 512;
1304
1305         /*
1306          * Init tasklets.
1307          */
1308         tasklet_init(&host->card_tasklet,
1309                 sdhci_tasklet_card, (unsigned long)host);
1310         tasklet_init(&host->finish_tasklet,
1311                 sdhci_tasklet_finish, (unsigned long)host);
1312
1313         setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1314
1315         ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
1316                 host->slot_descr, host);
1317         if (ret)
1318                 goto untasklet;
1319
1320         sdhci_init(host);
1321
1322 #ifdef CONFIG_MMC_DEBUG
1323         sdhci_dumpregs(host);
1324 #endif
1325
1326         host->chip = chip;
1327         chip->hosts[slot] = host;
1328
1329         mmc_add_host(mmc);
1330
1331         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1332                 host->addr, host->irq,
1333                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1334
1335         return 0;
1336
1337 untasklet:
1338         tasklet_kill(&host->card_tasklet);
1339         tasklet_kill(&host->finish_tasklet);
1340 unmap:
1341         iounmap(host->ioaddr);
1342 release:
1343         pci_release_region(pdev, host->bar);
1344 free:
1345         mmc_free_host(mmc);
1346
1347         return ret;
1348 }
1349
1350 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1351 {
1352         struct sdhci_chip *chip;
1353         struct mmc_host *mmc;
1354         struct sdhci_host *host;
1355
1356         chip = pci_get_drvdata(pdev);
1357         host = chip->hosts[slot];
1358         mmc = host->mmc;
1359
1360         chip->hosts[slot] = NULL;
1361
1362         mmc_remove_host(mmc);
1363
1364         sdhci_reset(host, SDHCI_RESET_ALL);
1365
1366         free_irq(host->irq, host);
1367
1368         del_timer_sync(&host->timer);
1369
1370         tasklet_kill(&host->card_tasklet);
1371         tasklet_kill(&host->finish_tasklet);
1372
1373         iounmap(host->ioaddr);
1374
1375         pci_release_region(pdev, host->bar);
1376
1377         mmc_free_host(mmc);
1378 }
1379
1380 static int __devinit sdhci_probe(struct pci_dev *pdev,
1381         const struct pci_device_id *ent)
1382 {
1383         int ret, i;
1384         u8 slots, rev;
1385         struct sdhci_chip *chip;
1386
1387         BUG_ON(pdev == NULL);
1388         BUG_ON(ent == NULL);
1389
1390         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1391
1392         printk(KERN_INFO DRIVER_NAME
1393                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1394                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1395                 (int)rev);
1396
1397         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1398         if (ret)
1399                 return ret;
1400
1401         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1402         DBG("found %d slot(s)\n", slots);
1403         if (slots == 0)
1404                 return -ENODEV;
1405
1406         ret = pci_enable_device(pdev);
1407         if (ret)
1408                 return ret;
1409
1410         chip = kzalloc(sizeof(struct sdhci_chip) +
1411                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1412         if (!chip) {
1413                 ret = -ENOMEM;
1414                 goto err;
1415         }
1416
1417         chip->pdev = pdev;
1418         chip->quirks = ent->driver_data;
1419
1420         if (debug_quirks)
1421                 chip->quirks = debug_quirks;
1422
1423         chip->num_slots = slots;
1424         pci_set_drvdata(pdev, chip);
1425
1426         for (i = 0;i < slots;i++) {
1427                 ret = sdhci_probe_slot(pdev, i);
1428                 if (ret) {
1429                         for (i--;i >= 0;i--)
1430                                 sdhci_remove_slot(pdev, i);
1431                         goto free;
1432                 }
1433         }
1434
1435         return 0;
1436
1437 free:
1438         pci_set_drvdata(pdev, NULL);
1439         kfree(chip);
1440
1441 err:
1442         pci_disable_device(pdev);
1443         return ret;
1444 }
1445
1446 static void __devexit sdhci_remove(struct pci_dev *pdev)
1447 {
1448         int i;
1449         struct sdhci_chip *chip;
1450
1451         chip = pci_get_drvdata(pdev);
1452
1453         if (chip) {
1454                 for (i = 0;i < chip->num_slots;i++)
1455                         sdhci_remove_slot(pdev, i);
1456
1457                 pci_set_drvdata(pdev, NULL);
1458
1459                 kfree(chip);
1460         }
1461
1462         pci_disable_device(pdev);
1463 }
1464
1465 static struct pci_driver sdhci_driver = {
1466         .name =         DRIVER_NAME,
1467         .id_table =     pci_ids,
1468         .probe =        sdhci_probe,
1469         .remove =       __devexit_p(sdhci_remove),
1470         .suspend =      sdhci_suspend,
1471         .resume =       sdhci_resume,
1472 };
1473
1474 /*****************************************************************************\
1475  *                                                                           *
1476  * Driver init/exit                                                          *
1477  *                                                                           *
1478 \*****************************************************************************/
1479
1480 static int __init sdhci_drv_init(void)
1481 {
1482         printk(KERN_INFO DRIVER_NAME
1483                 ": Secure Digital Host Controller Interface driver, "
1484                 DRIVER_VERSION "\n");
1485         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1486
1487         return pci_register_driver(&sdhci_driver);
1488 }
1489
1490 static void __exit sdhci_drv_exit(void)
1491 {
1492         DBG("Exiting\n");
1493
1494         pci_unregister_driver(&sdhci_driver);
1495 }
1496
1497 module_init(sdhci_drv_init);
1498 module_exit(sdhci_drv_exit);
1499
1500 module_param(debug_nodma, uint, 0444);
1501 module_param(debug_forcedma, uint, 0444);
1502 module_param(debug_quirks, uint, 0444);
1503
1504 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1505 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1506 MODULE_VERSION(DRIVER_VERSION);
1507 MODULE_LICENSE("GPL");
1508
1509 MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
1510 MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
1511 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");