projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: bounce requests for simple hosts
[linux-2.6-block.git] / drivers / mmc / host / sdhci.c
CommitLineData
d129bceb
PO		 1/*
2 * linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
3 *
14d836e7 4 * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
d129bceb
PO		 5 *
6 * This program is free software; you can redistribute it and/or modify
643f720c
PO		 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.
d129bceb
PO		 10 */
11
d129bceb
PO		 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>
d129bceb
PO		 18
19#include <asm/scatterlist.h>
20
21#include "sdhci.h"
22
23#define DRIVER_NAME "sdhci"
d129bceb 24
d129bceb 25#define DBG(f, x...) \
c6563178 26 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
d129bceb 27
67435274
PO		 28static unsigned int debug_nodma = 0;
29static unsigned int debug_forcedma = 0;
df673b22 30static unsigned int debug_quirks = 0;
67435274 31
645289dc 32#define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
98608076 33#define SDHCI_QUIRK_FORCE_DMA (1<<1)
8a4da143
PO		 34/* Controller doesn't like some resets when there is no card inserted. */
35#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
9e9dc5f2 36#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
645289dc 37
d129bceb 38static const struct pci_device_id pci_ids[] __devinitdata = {
645289dc
PO		 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,
98608076
PO		 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,
8a4da143
PO		 53 .driver_data = SDHCI_QUIRK_FORCE_DMA |
54 SDHCI_QUIRK_NO_CARD_NO_RESET,
98608076
PO		 55 },
56
57 {
58 .vendor = PCI_VENDOR_ID_TI,
59 .device = PCI_DEVICE_ID_TI_XX21_XX11_SD,
60 .subvendor = PCI_ANY_ID,
61 .subdevice = PCI_ANY_ID,
62 .driver_data = SDHCI_QUIRK_FORCE_DMA,
645289dc
PO		 63 },
64
9e9dc5f2
DS		 65 {
66 .vendor = PCI_VENDOR_ID_ENE,
67 .device = PCI_DEVICE_ID_ENE_CB712_SD,
68 .subvendor = PCI_ANY_ID,
69 .subdevice = PCI_ANY_ID,
70 .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
71 },
72
645289dc
PO		 73 { /* Generic SD host controller */
74 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
75 },
76
d129bceb
PO		 77 { /* end: all zeroes */ },
78};
79
80MODULE_DEVICE_TABLE(pci, pci_ids);
81
82static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
83static void sdhci_finish_data(struct sdhci_host *);
84
85static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
86static void sdhci_finish_command(struct sdhci_host *);
87
88static void sdhci_dumpregs(struct sdhci_host *host)
89{
90 printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
91
92 printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
93 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
94 readw(host->ioaddr + SDHCI_HOST_VERSION));
95 printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
96 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
97 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
98 printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
99 readl(host->ioaddr + SDHCI_ARGUMENT),
100 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
101 printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
102 readl(host->ioaddr + SDHCI_PRESENT_STATE),
103 readb(host->ioaddr + SDHCI_HOST_CONTROL));
104 printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
105 readb(host->ioaddr + SDHCI_POWER_CONTROL),
106 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
107 printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
108 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
109 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
110 printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
111 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
112 readl(host->ioaddr + SDHCI_INT_STATUS));
113 printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
114 readl(host->ioaddr + SDHCI_INT_ENABLE),
115 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
116 printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
117 readw(host->ioaddr + SDHCI_ACMD12_ERR),
118 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
119 printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
120 readl(host->ioaddr + SDHCI_CAPABILITIES),
121 readl(host->ioaddr + SDHCI_MAX_CURRENT));
122
123 printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
124}
125
126/*****************************************************************************\
127 * *
128 * Low level functions *
129 * *
130\*****************************************************************************/
131
132static void sdhci_reset(struct sdhci_host *host, u8 mask)
133{
e16514d8
PO		 134 unsigned long timeout;
135
8a4da143
PO		 136 if (host->chip->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
137 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
138 SDHCI_CARD_PRESENT))
139 return;
140 }
141
d129bceb
PO		 142 writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
143
e16514d8 144 if (mask & SDHCI_RESET_ALL)
d129bceb
PO		 145 host->clock = 0;
146
e16514d8
PO		 147 /* Wait max 100 ms */
148 timeout = 100;
149
150 /* hw clears the bit when it's done */
151 while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
152 if (timeout == 0) {
acf1da45 153 printk(KERN_ERR "%s: Reset 0x%x never completed.\n",
e16514d8
PO		 154 mmc_hostname(host->mmc), (int)mask);
155 sdhci_dumpregs(host);
156 return;
157 }
158 timeout--;
159 mdelay(1);
d129bceb
PO		 160 }
161}
162
163static void sdhci_init(struct sdhci_host *host)
164{
165 u32 intmask;
166
167 sdhci_reset(host, SDHCI_RESET_ALL);
168
3192a28f
PO		 169 intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
170 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
171 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
172 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
a406f5a3 173 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
3192a28f 174 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
d129bceb
PO		 175
176 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
177 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
d129bceb
PO		 178}
179
180static void sdhci_activate_led(struct sdhci_host *host)
181{
182 u8 ctrl;
183
184 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
185 ctrl |= SDHCI_CTRL_LED;
186 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
187}
188
189static void sdhci_deactivate_led(struct sdhci_host *host)
190{
191 u8 ctrl;
192
193 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
194 ctrl &= ~SDHCI_CTRL_LED;
195 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
196}
197
198/*****************************************************************************\
199 * *
200 * Core functions *
201 * *
202\*****************************************************************************/
203
2a22b14e 204static inline char* sdhci_sg_to_buffer(struct sdhci_host* host)
d129bceb 205{
2a22b14e 206 return page_address(host->cur_sg->page) + host->cur_sg->offset;
d129bceb
PO		 207}
208
209static inline int sdhci_next_sg(struct sdhci_host* host)
210{
211 /*
212 * Skip to next SG entry.
213 */
214 host->cur_sg++;
215 host->num_sg--;
216
217 /*
218 * Any entries left?
219 */
220 if (host->num_sg > 0) {
221 host->offset = 0;
222 host->remain = host->cur_sg->length;
223 }
224
225 return host->num_sg;
226}
227
a406f5a3 228static void sdhci_read_block_pio(struct sdhci_host *host)
d129bceb 229{
a406f5a3
PO		 230 int blksize, chunk_remain;
231 u32 data;
d129bceb 232 char *buffer;
a406f5a3 233 int size;
d129bceb 234
a406f5a3 235 DBG("PIO reading\n");
d129bceb 236
a406f5a3
PO		 237 blksize = host->data->blksz;
238 chunk_remain = 0;
239 data = 0;
d129bceb 240
2a22b14e 241 buffer = sdhci_sg_to_buffer(host) + host->offset;
d129bceb 242
a406f5a3
PO		 243 while (blksize) {
244 if (chunk_remain == 0) {
245 data = readl(host->ioaddr + SDHCI_BUFFER);
246 chunk_remain = min(blksize, 4);
247 }
d129bceb 248
14d836e7 249 size = min(host->remain, chunk_remain);
d129bceb 250
a406f5a3
PO		 251 chunk_remain -= size;
252 blksize -= size;
253 host->offset += size;
254 host->remain -= size;
14d836e7 255
a406f5a3
PO		 256 while (size) {
257 *buffer = data & 0xFF;
258 buffer++;
259 data >>= 8;
260 size--;
261 }
d129bceb 262
a406f5a3 263 if (host->remain == 0) {
a406f5a3
PO		 264 if (sdhci_next_sg(host) == 0) {
265 BUG_ON(blksize != 0);
266 return;
267 }
2a22b14e 268 buffer = sdhci_sg_to_buffer(host);
d129bceb 269 }
a406f5a3 270 }
a406f5a3 271}
d129bceb 272
a406f5a3
PO		 273static void sdhci_write_block_pio(struct sdhci_host *host)
274{
275 int blksize, chunk_remain;
276 u32 data;
277 char *buffer;
278 int bytes, size;
d129bceb 279
a406f5a3
PO		 280 DBG("PIO writing\n");
281
282 blksize = host->data->blksz;
283 chunk_remain = 4;
284 data = 0;
d129bceb 285
a406f5a3 286 bytes = 0;
2a22b14e 287 buffer = sdhci_sg_to_buffer(host) + host->offset;
d129bceb 288
a406f5a3 289 while (blksize) {
14d836e7 290 size = min(host->remain, chunk_remain);
a406f5a3
PO		 291
292 chunk_remain -= size;
293 blksize -= size;
d129bceb
PO		 294 host->offset += size;
295 host->remain -= size;
14d836e7 296
a406f5a3
PO		 297 while (size) {
298 data >>= 8;
299 data |= (u32)*buffer << 24;
300 buffer++;
301 size--;
302 }
303
304 if (chunk_remain == 0) {
305 writel(data, host->ioaddr + SDHCI_BUFFER);
306 chunk_remain = min(blksize, 4);
307 }
d129bceb
PO		 308
309 if (host->remain == 0) {
d129bceb 310 if (sdhci_next_sg(host) == 0) {
a406f5a3 311 BUG_ON(blksize != 0);
d129bceb
PO		 312 return;
313 }
2a22b14e 314 buffer = sdhci_sg_to_buffer(host);
d129bceb
PO		 315 }
316 }
a406f5a3
PO		 317}
318
319static void sdhci_transfer_pio(struct sdhci_host *host)
320{
321 u32 mask;
322
323 BUG_ON(!host->data);
324
14d836e7 325 if (host->num_sg == 0)
a406f5a3
PO		 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);
d129bceb 338
14d836e7 339 if (host->num_sg == 0)
a406f5a3 340 break;
a406f5a3 341 }
d129bceb 342
a406f5a3 343 DBG("PIO transfer complete.\n");
d129bceb
PO		 344}
345
346static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
347{
1c8cde92
PO		 348 u8 count;
349 unsigned target_timeout, current_timeout;
d129bceb
PO		 350
351 WARN_ON(host->data);
352
c7fa9963 353 if (data == NULL)
d129bceb 354 return;
d129bceb
PO		 355
356 DBG("blksz %04x blks %04x flags %08x\n",
a3fd4a1b 357 data->blksz, data->blocks, data->flags);
d129bceb
PO		 358 DBG("tsac %d ms nsac %d clk\n",
359 data->timeout_ns / 1000000, data->timeout_clks);
360
bab76961
PO		 361 /* Sanity checks */
362 BUG_ON(data->blksz * data->blocks > 524288);
fe4a3c7a 363 BUG_ON(data->blksz > host->mmc->max_blk_size);
1d676e02 364 BUG_ON(data->blocks > 65535);
d129bceb 365
1c8cde92
PO		 366 /* timeout in us */
367 target_timeout = data->timeout_ns / 1000 +
368 data->timeout_clks / host->clock;
d129bceb 369
1c8cde92
PO		 370 /*
371 * Figure out needed cycles.
372 * We do this in steps in order to fit inside a 32 bit int.
373 * The first step is the minimum timeout, which will have a
374 * minimum resolution of 6 bits:
375 * (1) 2^13*1000 > 2^22,
376 * (2) host->timeout_clk < 2^16
377 * =>
378 * (1) / (2) > 2^6
379 */
380 count = 0;
381 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
382 while (current_timeout < target_timeout) {
383 count++;
384 current_timeout <<= 1;
385 if (count >= 0xF)
386 break;
387 }
388
389 if (count >= 0xF) {
390 printk(KERN_WARNING "%s: Too large timeout requested!\n",
391 mmc_hostname(host->mmc));
392 count = 0xE;
393 }
394
395 writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
d129bceb
PO		 396
397 if (host->flags & SDHCI_USE_DMA) {
398 int count;
399
400 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
401 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
402 BUG_ON(count != 1);
403
404 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
405 } else {
d129bceb
PO		 406 host->cur_sg = data->sg;
407 host->num_sg = data->sg_len;
408
409 host->offset = 0;
410 host->remain = host->cur_sg->length;
411 }
c7fa9963 412
bab76961
PO		 413 /* We do not handle DMA boundaries, so set it to max (512 KiB) */
414 writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
415 host->ioaddr + SDHCI_BLOCK_SIZE);
c7fa9963
PO		 416 writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
417}
418
419static void sdhci_set_transfer_mode(struct sdhci_host *host,
420 struct mmc_data *data)
421{
422 u16 mode;
423
424 WARN_ON(host->data);
425
426 if (data == NULL)
427 return;
428
429 mode = SDHCI_TRNS_BLK_CNT_EN;
430 if (data->blocks > 1)
431 mode |= SDHCI_TRNS_MULTI;
432 if (data->flags & MMC_DATA_READ)
433 mode |= SDHCI_TRNS_READ;
434 if (host->flags & SDHCI_USE_DMA)
435 mode |= SDHCI_TRNS_DMA;
436
437 writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
d129bceb
PO		 438}
439
440static void sdhci_finish_data(struct sdhci_host *host)
441{
442 struct mmc_data *data;
d129bceb
PO		 443 u16 blocks;
444
445 BUG_ON(!host->data);
446
447 data = host->data;
448 host->data = NULL;
449
450 if (host->flags & SDHCI_USE_DMA) {
451 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
452 (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
d129bceb
PO		 453 }
454
455 /*
456 * Controller doesn't count down when in single block mode.
457 */
458 if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
459 blocks = 0;
460 else
461 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
a3fd4a1b 462 data->bytes_xfered = data->blksz * (data->blocks - blocks);
d129bceb
PO		 463
464 if ((data->error == MMC_ERR_NONE) && blocks) {
465 printk(KERN_ERR "%s: Controller signalled completion even "
acf1da45
PO		 466 "though there were blocks left.\n",
467 mmc_hostname(host->mmc));
d129bceb 468 data->error = MMC_ERR_FAILED;
d129bceb
PO		 469 }
470
471 DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
472
473 if (data->stop) {
474 /*
475 * The controller needs a reset of internal state machines
476 * upon error conditions.
477 */
478 if (data->error != MMC_ERR_NONE) {
479 sdhci_reset(host, SDHCI_RESET_CMD);
480 sdhci_reset(host, SDHCI_RESET_DATA);
481 }
482
483 sdhci_send_command(host, data->stop);
484 } else
485 tasklet_schedule(&host->finish_tasklet);
486}
487
488static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
489{
490 int flags;
fd2208d7 491 u32 mask;
7cb2c76f 492 unsigned long timeout;
d129bceb
PO		 493
494 WARN_ON(host->cmd);
495
496 DBG("Sending cmd (%x)\n", cmd->opcode);
497
498 /* Wait max 10 ms */
7cb2c76f 499 timeout = 10;
fd2208d7
PO		 500
501 mask = SDHCI_CMD_INHIBIT;
502 if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
503 mask |= SDHCI_DATA_INHIBIT;
504
505 /* We shouldn't wait for data inihibit for stop commands, even
506 though they might use busy signaling */
507 if (host->mrq->data && (cmd == host->mrq->data->stop))
508 mask &= ~SDHCI_DATA_INHIBIT;
509
510 while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
7cb2c76f 511 if (timeout == 0) {
d129bceb 512 printk(KERN_ERR "%s: Controller never released "
acf1da45 513 "inhibit bit(s).\n", mmc_hostname(host->mmc));
d129bceb
PO		 514 sdhci_dumpregs(host);
515 cmd->error = MMC_ERR_FAILED;
516 tasklet_schedule(&host->finish_tasklet);
517 return;
518 }
7cb2c76f
PO		 519 timeout--;
520 mdelay(1);
521 }
d129bceb
PO		 522
523 mod_timer(&host->timer, jiffies + 10 * HZ);
524
525 host->cmd = cmd;
526
527 sdhci_prepare_data(host, cmd->data);
528
529 writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
530
c7fa9963
PO		 531 sdhci_set_transfer_mode(host, cmd->data);
532
d129bceb 533 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
acf1da45 534 printk(KERN_ERR "%s: Unsupported response type!\n",
d129bceb
PO		 535 mmc_hostname(host->mmc));
536 cmd->error = MMC_ERR_INVALID;
537 tasklet_schedule(&host->finish_tasklet);
538 return;
539 }
540
541 if (!(cmd->flags & MMC_RSP_PRESENT))
542 flags = SDHCI_CMD_RESP_NONE;
543 else if (cmd->flags & MMC_RSP_136)
544 flags = SDHCI_CMD_RESP_LONG;
545 else if (cmd->flags & MMC_RSP_BUSY)
546 flags = SDHCI_CMD_RESP_SHORT_BUSY;
547 else
548 flags = SDHCI_CMD_RESP_SHORT;
549
550 if (cmd->flags & MMC_RSP_CRC)
551 flags |= SDHCI_CMD_CRC;
552 if (cmd->flags & MMC_RSP_OPCODE)
553 flags |= SDHCI_CMD_INDEX;
554 if (cmd->data)
555 flags |= SDHCI_CMD_DATA;
556
fb61e289 557 writew(SDHCI_MAKE_CMD(cmd->opcode, flags),
d129bceb
PO		 558 host->ioaddr + SDHCI_COMMAND);
559}
560
561static void sdhci_finish_command(struct sdhci_host *host)
562{
563 int i;
564
565 BUG_ON(host->cmd == NULL);
566
567 if (host->cmd->flags & MMC_RSP_PRESENT) {
568 if (host->cmd->flags & MMC_RSP_136) {
569 /* CRC is stripped so we need to do some shifting. */
570 for (i = 0;i < 4;i++) {
571 host->cmd->resp[i] = readl(host->ioaddr +
572 SDHCI_RESPONSE + (3-i)*4) << 8;
573 if (i != 3)
574 host->cmd->resp[i] |=
575 readb(host->ioaddr +
576 SDHCI_RESPONSE + (3-i)*4-1);
577 }
578 } else {
579 host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
580 }
581 }
582
583 host->cmd->error = MMC_ERR_NONE;
584
585 DBG("Ending cmd (%x)\n", host->cmd->opcode);
586
3192a28f 587 if (host->cmd->data)
d129bceb 588 host->data = host->cmd->data;
3192a28f 589 else
d129bceb
PO		 590 tasklet_schedule(&host->finish_tasklet);
591
592 host->cmd = NULL;
593}
594
595static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
596{
597 int div;
598 u16 clk;
7cb2c76f 599 unsigned long timeout;
d129bceb
PO		 600
601 if (clock == host->clock)
602 return;
603
604 writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
605
606 if (clock == 0)
607 goto out;
608
609 for (div = 1;div < 256;div *= 2) {
610 if ((host->max_clk / div) <= clock)
611 break;
612 }
613 div >>= 1;
614
615 clk = div << SDHCI_DIVIDER_SHIFT;
616 clk |= SDHCI_CLOCK_INT_EN;
617 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
618
619 /* Wait max 10 ms */
7cb2c76f
PO		 620 timeout = 10;
621 while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
622 & SDHCI_CLOCK_INT_STABLE)) {
623 if (timeout == 0) {
acf1da45
PO		 624 printk(KERN_ERR "%s: Internal clock never "
625 "stabilised.\n", mmc_hostname(host->mmc));
d129bceb
PO		 626 sdhci_dumpregs(host);
627 return;
628 }
7cb2c76f
PO		 629 timeout--;
630 mdelay(1);
631 }
d129bceb
PO		 632
633 clk |= SDHCI_CLOCK_CARD_EN;
634 writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
635
636out:
637 host->clock = clock;
638}
639
146ad66e
PO		 640static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
641{
642 u8 pwr;
643
644 if (host->power == power)
645 return;
646
9e9dc5f2
DS		 647 if (power == (unsigned short)-1) {
648 writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
146ad66e 649 goto out;
9e9dc5f2
DS		 650 }
651
652 /*
653 * Spec says that we should clear the power reg before setting
654 * a new value. Some controllers don't seem to like this though.
655 */
656 if (!(host->chip->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
657 writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
146ad66e
PO		 658
659 pwr = SDHCI_POWER_ON;
660
4be34c99 661 switch (1 << power) {
55556da0 662 case MMC_VDD_165_195:
146ad66e
PO		 663 pwr |= SDHCI_POWER_180;
664 break;
4be34c99
PL		 665 case MMC_VDD_29_30:
666 case MMC_VDD_30_31:
146ad66e
PO		 667 pwr |= SDHCI_POWER_300;
668 break;
4be34c99
PL		 669 case MMC_VDD_32_33:
670 case MMC_VDD_33_34:
146ad66e
PO		 671 pwr |= SDHCI_POWER_330;
672 break;
673 default:
674 BUG();
675 }
676
677 writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
678
679out:
680 host->power = power;
681}
682
d129bceb
PO		 683/*****************************************************************************\
684 * *
685 * MMC callbacks *
686 * *
687\*****************************************************************************/
688
689static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
690{
691 struct sdhci_host *host;
692 unsigned long flags;
693
694 host = mmc_priv(mmc);
695
696 spin_lock_irqsave(&host->lock, flags);
697
698 WARN_ON(host->mrq != NULL);
699
700 sdhci_activate_led(host);
701
702 host->mrq = mrq;
703
704 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
705 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
706 tasklet_schedule(&host->finish_tasklet);
707 } else
708 sdhci_send_command(host, mrq->cmd);
709
5f25a66f 710 mmiowb();
d129bceb
PO		 711 spin_unlock_irqrestore(&host->lock, flags);
712}
713
714static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
715{
716 struct sdhci_host *host;
717 unsigned long flags;
718 u8 ctrl;
719
720 host = mmc_priv(mmc);
721
722 spin_lock_irqsave(&host->lock, flags);
723
d129bceb
PO		 724 /*
725 * Reset the chip on each power off.
726 * Should clear out any weird states.
727 */
728 if (ios->power_mode == MMC_POWER_OFF) {
729 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
d129bceb 730 sdhci_init(host);
d129bceb
PO		 731 }
732
733 sdhci_set_clock(host, ios->clock);
734
735 if (ios->power_mode == MMC_POWER_OFF)
146ad66e 736 sdhci_set_power(host, -1);
d129bceb 737 else
146ad66e 738 sdhci_set_power(host, ios->vdd);
d129bceb
PO		 739
740 ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
cd9277c0 741
d129bceb
PO		 742 if (ios->bus_width == MMC_BUS_WIDTH_4)
743 ctrl |= SDHCI_CTRL_4BITBUS;
744 else
745 ctrl &= ~SDHCI_CTRL_4BITBUS;
cd9277c0
PO		 746
747 if (ios->timing == MMC_TIMING_SD_HS)
748 ctrl |= SDHCI_CTRL_HISPD;
749 else
750 ctrl &= ~SDHCI_CTRL_HISPD;
751
d129bceb
PO		 752 writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
753
5f25a66f 754 mmiowb();
d129bceb
PO		 755 spin_unlock_irqrestore(&host->lock, flags);
756}
757
758static 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
ab7aefd0 775static const struct mmc_host_ops sdhci_ops = {
d129bceb
PO		 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
787static 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
816static 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))))) {
645289dc
PO		 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. */
d129bceb
PO		 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
5f25a66f 862 mmiowb();
d129bceb
PO		 863 spin_unlock_irqrestore(&host->lock, flags);
864
865 mmc_request_done(host->mmc, mrq);
866}
867
868static void sdhci_timeout_timer(unsigned long data)
869{
870 struct sdhci_host *host;
871 unsigned long flags;
872
873 host = (struct sdhci_host*)data;
874
875 spin_lock_irqsave(&host->lock, flags);
876
877 if (host->mrq) {
acf1da45
PO		 878 printk(KERN_ERR "%s: Timeout waiting for hardware "
879 "interrupt.\n", mmc_hostname(host->mmc));
d129bceb
PO		 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
5f25a66f 895 mmiowb();
d129bceb
PO		 896 spin_unlock_irqrestore(&host->lock, flags);
897}
898
899/*****************************************************************************\
900 * *
901 * Interrupt handling *
902 * *
903\*****************************************************************************/
904
905static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
906{
907 BUG_ON(intmask == 0);
908
909 if (!host->cmd) {
910 printk(KERN_ERR "%s: Got command interrupt even though no "
911 "command operation was in progress.\n",
912 mmc_hostname(host->mmc));
d129bceb
PO		 913 sdhci_dumpregs(host);
914 return;
915 }
916
917 if (intmask & SDHCI_INT_RESPONSE)
918 sdhci_finish_command(host);
919 else {
920 if (intmask & SDHCI_INT_TIMEOUT)
921 host->cmd->error = MMC_ERR_TIMEOUT;
922 else if (intmask & SDHCI_INT_CRC)
923 host->cmd->error = MMC_ERR_BADCRC;
924 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
925 host->cmd->error = MMC_ERR_FAILED;
926 else
927 host->cmd->error = MMC_ERR_INVALID;
928
929 tasklet_schedule(&host->finish_tasklet);
930 }
931}
932
933static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
934{
935 BUG_ON(intmask == 0);
936
937 if (!host->data) {
938 /*
939 * A data end interrupt is sent together with the response
940 * for the stop command.
941 */
942 if (intmask & SDHCI_INT_DATA_END)
943 return;
944
945 printk(KERN_ERR "%s: Got data interrupt even though no "
946 "data operation was in progress.\n",
947 mmc_hostname(host->mmc));
d129bceb
PO		 948 sdhci_dumpregs(host);
949
950 return;
951 }
952
953 if (intmask & SDHCI_INT_DATA_TIMEOUT)
954 host->data->error = MMC_ERR_TIMEOUT;
955 else if (intmask & SDHCI_INT_DATA_CRC)
956 host->data->error = MMC_ERR_BADCRC;
957 else if (intmask & SDHCI_INT_DATA_END_BIT)
958 host->data->error = MMC_ERR_FAILED;
959
960 if (host->data->error != MMC_ERR_NONE)
961 sdhci_finish_data(host);
962 else {
a406f5a3 963 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
d129bceb
PO		 964 sdhci_transfer_pio(host);
965
6ba736a1
PO		 966 /*
967 * We currently don't do anything fancy with DMA
968 * boundaries, but as we can't disable the feature
969 * we need to at least restart the transfer.
970 */
971 if (intmask & SDHCI_INT_DMA_END)
972 writel(readl(host->ioaddr + SDHCI_DMA_ADDRESS),
973 host->ioaddr + SDHCI_DMA_ADDRESS);
974
d129bceb
PO		 975 if (intmask & SDHCI_INT_DATA_END)
976 sdhci_finish_data(host);
977 }
978}
979
7d12e780 980static irqreturn_t sdhci_irq(int irq, void *dev_id)
d129bceb
PO		 981{
982 irqreturn_t result;
983 struct sdhci_host* host = dev_id;
984 u32 intmask;
985
986 spin_lock(&host->lock);
987
988 intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
989
62df67a5 990 if (!intmask || intmask == 0xffffffff) {
d129bceb
PO		 991 result = IRQ_NONE;
992 goto out;
993 }
994
995 DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
996
3192a28f
PO		 997 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
998 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
999 host->ioaddr + SDHCI_INT_STATUS);
d129bceb 1000 tasklet_schedule(&host->card_tasklet);
3192a28f 1001 }
d129bceb 1002
3192a28f 1003 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
d129bceb 1004
3192a28f 1005 if (intmask & SDHCI_INT_CMD_MASK) {
d129bceb
PO		 1006 writel(intmask & SDHCI_INT_CMD_MASK,
1007 host->ioaddr + SDHCI_INT_STATUS);
3192a28f 1008 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
d129bceb
PO		 1009 }
1010
1011 if (intmask & SDHCI_INT_DATA_MASK) {
d129bceb
PO		 1012 writel(intmask & SDHCI_INT_DATA_MASK,
1013 host->ioaddr + SDHCI_INT_STATUS);
3192a28f 1014 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
d129bceb
PO		 1015 }
1016
1017 intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
1018
d129bceb 1019 if (intmask & SDHCI_INT_BUS_POWER) {
3192a28f 1020 printk(KERN_ERR "%s: Card is consuming too much power!\n",
d129bceb 1021 mmc_hostname(host->mmc));
3192a28f 1022 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
d129bceb
PO		 1023 }
1024
3192a28f
PO		 1025 intmask &= SDHCI_INT_BUS_POWER;
1026
1027 if (intmask) {
acf1da45 1028 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
3192a28f 1029 mmc_hostname(host->mmc), intmask);
d129bceb
PO		 1030 sdhci_dumpregs(host);
1031
d129bceb 1032 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
3192a28f 1033 }
d129bceb
PO		 1034
1035 result = IRQ_HANDLED;
1036
5f25a66f 1037 mmiowb();
d129bceb
PO		 1038out:
1039 spin_unlock(&host->lock);
1040
1041 return result;
1042}
1043
1044/*****************************************************************************\
1045 * *
1046 * Suspend/resume *
1047 * *
1048\*****************************************************************************/
1049
1050#ifdef CONFIG_PM
1051
1052static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
1053{
1054 struct sdhci_chip *chip;
1055 int i, ret;
1056
1057 chip = pci_get_drvdata(pdev);
1058 if (!chip)
1059 return 0;
1060
1061 DBG("Suspending...\n");
1062
1063 for (i = 0;i < chip->num_slots;i++) {
1064 if (!chip->hosts[i])
1065 continue;
1066 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1067 if (ret) {
1068 for (i--;i >= 0;i--)
1069 mmc_resume_host(chip->hosts[i]->mmc);
1070 return ret;
1071 }
1072 }
1073
1074 pci_save_state(pdev);
1075 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
a715dfc7
PO		 1076
1077 for (i = 0;i < chip->num_slots;i++) {
1078 if (!chip->hosts[i])
1079 continue;
1080 free_irq(chip->hosts[i]->irq, chip->hosts[i]);
1081 }
1082
d129bceb
PO		 1083 pci_disable_device(pdev);
1084 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1085
1086 return 0;
1087}
1088
1089static int sdhci_resume (struct pci_dev *pdev)
1090{
1091 struct sdhci_chip *chip;
1092 int i, ret;
1093
1094 chip = pci_get_drvdata(pdev);
1095 if (!chip)
1096 return 0;
1097
1098 DBG("Resuming...\n");
1099
1100 pci_set_power_state(pdev, PCI_D0);
1101 pci_restore_state(pdev);
df1c4b7b
PO		 1102 ret = pci_enable_device(pdev);
1103 if (ret)
1104 return ret;
d129bceb
PO		 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);
a715dfc7
PO		 1111 ret = request_irq(chip->hosts[i]->irq, sdhci_irq,
1112 IRQF_SHARED, chip->hosts[i]->slot_descr,
1113 chip->hosts[i]);
1114 if (ret)
1115 return ret;
d129bceb 1116 sdhci_init(chip->hosts[i]);
5f25a66f 1117 mmiowb();
d129bceb
PO		 1118 ret = mmc_resume_host(chip->hosts[i]->mmc);
1119 if (ret)
1120 return ret;
1121 }
1122
1123 return 0;
1124}
1125
1126#else /* CONFIG_PM */
1127
1128#define sdhci_suspend NULL
1129#define sdhci_resume NULL
1130
1131#endif /* CONFIG_PM */
1132
1133/*****************************************************************************\
1134 * *
1135 * Device probing/removal *
1136 * *
1137\*****************************************************************************/
1138
1139static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1140{
1141 int ret;
4a965505 1142 unsigned int version;
d129bceb
PO		 1143 struct sdhci_chip *chip;
1144 struct mmc_host *mmc;
1145 struct sdhci_host *host;
1146
1147 u8 first_bar;
1148 unsigned int caps;
1149
1150 chip = pci_get_drvdata(pdev);
1151 BUG_ON(!chip);
1152
1153 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1154 if (ret)
1155 return ret;
1156
1157 first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1158
1159 if (first_bar > 5) {
1160 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1161 return -ENODEV;
1162 }
1163
1164 if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1165 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1166 return -ENODEV;
1167 }
1168
1169 if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
a98087cf
PO		 1170 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. "
1171 "You may experience problems.\n");
d129bceb
PO		 1172 }
1173
67435274
PO		 1174 if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1175 printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n");
1176 return -ENODEV;
1177 }
1178
1179 if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1180 printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n");
1181 return -ENODEV;
1182 }
1183
d129bceb
PO		 1184 mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1185 if (!mmc)
1186 return -ENOMEM;
1187
1188 host = mmc_priv(mmc);
1189 host->mmc = mmc;
1190
8a4da143
PO		 1191 host->chip = chip;
1192 chip->hosts[slot] = host;
1193
d129bceb
PO		 1194 host->bar = first_bar + slot;
1195
1196 host->addr = pci_resource_start(pdev, host->bar);
1197 host->irq = pdev->irq;
1198
1199 DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1200
1201 snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1202
1203 ret = pci_request_region(pdev, host->bar, host->slot_descr);
1204 if (ret)
1205 goto free;
1206
1207 host->ioaddr = ioremap_nocache(host->addr,
1208 pci_resource_len(pdev, host->bar));
1209 if (!host->ioaddr) {
1210 ret = -ENOMEM;
1211 goto release;
1212 }
1213
d96649ed
PO		 1214 sdhci_reset(host, SDHCI_RESET_ALL);
1215
4a965505
PO		 1216 version = readw(host->ioaddr + SDHCI_HOST_VERSION);
1217 version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
1218 if (version != 0) {
1219 printk(KERN_ERR "%s: Unknown controller version (%d). "
8b1b2185 1220 "You may experience problems.\n", host->slot_descr,
4a965505 1221 version);
4a965505
PO		 1222 }
1223
d129bceb
PO		 1224 caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1225
67435274
PO		 1226 if (debug_nodma)
1227 DBG("DMA forced off\n");
1228 else if (debug_forcedma) {
1229 DBG("DMA forced on\n");
1230 host->flags |= SDHCI_USE_DMA;
98608076
PO		 1231 } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
1232 host->flags |= SDHCI_USE_DMA;
1233 else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
67435274
PO		 1234 DBG("Controller doesn't have DMA interface\n");
1235 else if (!(caps & SDHCI_CAN_DO_DMA))
1236 DBG("Controller doesn't have DMA capability\n");
1237 else
d129bceb
PO		 1238 host->flags |= SDHCI_USE_DMA;
1239
1240 if (host->flags & SDHCI_USE_DMA) {
1241 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1242 printk(KERN_WARNING "%s: No suitable DMA available. "
1243 "Falling back to PIO.\n", host->slot_descr);
1244 host->flags &= ~SDHCI_USE_DMA;
1245 }
1246 }
1247
1248 if (host->flags & SDHCI_USE_DMA)
1249 pci_set_master(pdev);
1250 else /* XXX: Hack to get MMC layer to avoid highmem */
1251 pdev->dma_mask = 0;
1252
8ef1a143
PO		 1253 host->max_clk =
1254 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1255 if (host->max_clk == 0) {
1256 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1257 "frequency.\n", host->slot_descr);
1258 ret = -ENODEV;
1259 goto unmap;
1260 }
d129bceb
PO		 1261 host->max_clk *= 1000000;
1262
1c8cde92
PO		 1263 host->timeout_clk =
1264 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1265 if (host->timeout_clk == 0) {
1266 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1267 "frequency.\n", host->slot_descr);
1268 ret = -ENODEV;
1269 goto unmap;
1270 }
1271 if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1272 host->timeout_clk *= 1000;
d129bceb
PO		 1273
1274 /*
1275 * Set host parameters.
1276 */
1277 mmc->ops = &sdhci_ops;
1278 mmc->f_min = host->max_clk / 256;
1279 mmc->f_max = host->max_clk;
42431acb 1280 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
d129bceb 1281
cd9277c0
PO		 1282 if (caps & SDHCI_CAN_DO_HISPD)
1283 mmc->caps |= MMC_CAP_SD_HIGHSPEED;
1284
146ad66e
PO		 1285 mmc->ocr_avail = 0;
1286 if (caps & SDHCI_CAN_VDD_330)
1287 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
c70840e8 1288 if (caps & SDHCI_CAN_VDD_300)
146ad66e 1289 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
c70840e8 1290 if (caps & SDHCI_CAN_VDD_180)
55556da0 1291 mmc->ocr_avail |= MMC_VDD_165_195;
146ad66e
PO		 1292
1293 if (mmc->ocr_avail == 0) {
1294 printk(KERN_ERR "%s: Hardware doesn't report any "
1295 "support voltages.\n", host->slot_descr);
1296 ret = -ENODEV;
1297 goto unmap;
1298 }
1299
d129bceb
PO		 1300 spin_lock_init(&host->lock);
1301
1302 /*
1303 * Maximum number of segments. Hardware cannot do scatter lists.
1304 */
1305 if (host->flags & SDHCI_USE_DMA)
1306 mmc->max_hw_segs = 1;
1307 else
1308 mmc->max_hw_segs = 16;
1309 mmc->max_phys_segs = 16;
1310
1311 /*
bab76961 1312 * Maximum number of sectors in one transfer. Limited by DMA boundary
55db890a 1313 * size (512KiB).
d129bceb 1314 */
55db890a 1315 mmc->max_req_size = 524288;
d129bceb
PO		 1316
1317 /*
1318 * Maximum segment size. Could be one segment with the maximum number
55db890a 1319 * of bytes.
d129bceb 1320 */
55db890a 1321 mmc->max_seg_size = mmc->max_req_size;
d129bceb 1322
fe4a3c7a
PO		 1323 /*
1324 * Maximum block size. This varies from controller to controller and
1325 * is specified in the capabilities register.
1326 */
1327 mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1328 if (mmc->max_blk_size >= 3) {
1329 printk(KERN_ERR "%s: Invalid maximum block size.\n",
1330 host->slot_descr);
1331 ret = -ENODEV;
1332 goto unmap;
1333 }
1334 mmc->max_blk_size = 512 << mmc->max_blk_size;
1335
55db890a
PO		 1336 /*
1337 * Maximum block count.
1338 */
1339 mmc->max_blk_count = 65535;
1340
d129bceb
PO		 1341 /*
1342 * Init tasklets.
1343 */
1344 tasklet_init(&host->card_tasklet,
1345 sdhci_tasklet_card, (unsigned long)host);
1346 tasklet_init(&host->finish_tasklet,
1347 sdhci_tasklet_finish, (unsigned long)host);
1348
e4cad1b5 1349 setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
d129bceb 1350
dace1453 1351 ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
d129bceb
PO		 1352 host->slot_descr, host);
1353 if (ret)
8ef1a143 1354 goto untasklet;
d129bceb
PO		 1355
1356 sdhci_init(host);
1357
1358#ifdef CONFIG_MMC_DEBUG
1359 sdhci_dumpregs(host);
1360#endif
1361
5f25a66f
PO		 1362 mmiowb();
1363
d129bceb
PO		 1364 mmc_add_host(mmc);
1365
1366 printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1367 host->addr, host->irq,
1368 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1369
1370 return 0;
1371
8ef1a143 1372untasklet:
d129bceb
PO		 1373 tasklet_kill(&host->card_tasklet);
1374 tasklet_kill(&host->finish_tasklet);
8ef1a143 1375unmap:
d129bceb
PO		 1376 iounmap(host->ioaddr);
1377release:
1378 pci_release_region(pdev, host->bar);
1379free:
1380 mmc_free_host(mmc);
1381
1382 return ret;
1383}
1384
1385static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1386{
1387 struct sdhci_chip *chip;
1388 struct mmc_host *mmc;
1389 struct sdhci_host *host;
1390
1391 chip = pci_get_drvdata(pdev);
1392 host = chip->hosts[slot];
1393 mmc = host->mmc;
1394
1395 chip->hosts[slot] = NULL;
1396
1397 mmc_remove_host(mmc);
1398
1399 sdhci_reset(host, SDHCI_RESET_ALL);
1400
1401 free_irq(host->irq, host);
1402
1403 del_timer_sync(&host->timer);
1404
1405 tasklet_kill(&host->card_tasklet);
1406 tasklet_kill(&host->finish_tasklet);
1407
1408 iounmap(host->ioaddr);
1409
1410 pci_release_region(pdev, host->bar);
1411
1412 mmc_free_host(mmc);
1413}
1414
1415static int __devinit sdhci_probe(struct pci_dev *pdev,
1416 const struct pci_device_id *ent)
1417{
1418 int ret, i;
51f82bc0 1419 u8 slots, rev;
d129bceb
PO		 1420 struct sdhci_chip *chip;
1421
1422 BUG_ON(pdev == NULL);
1423 BUG_ON(ent == NULL);
1424
51f82bc0
PO		 1425 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1426
1427 printk(KERN_INFO DRIVER_NAME
1428 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1429 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1430 (int)rev);
d129bceb
PO		 1431
1432 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1433 if (ret)
1434 return ret;
1435
1436 slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1437 DBG("found %d slot(s)\n", slots);
1438 if (slots == 0)
1439 return -ENODEV;
1440
1441 ret = pci_enable_device(pdev);
1442 if (ret)
1443 return ret;
1444
1445 chip = kzalloc(sizeof(struct sdhci_chip) +
1446 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1447 if (!chip) {
1448 ret = -ENOMEM;
1449 goto err;
1450 }
1451
1452 chip->pdev = pdev;
df673b22
PO		 1453 chip->quirks = ent->driver_data;
1454
1455 if (debug_quirks)
1456 chip->quirks = debug_quirks;
d129bceb
PO		 1457
1458 chip->num_slots = slots;
1459 pci_set_drvdata(pdev, chip);
1460
1461 for (i = 0;i < slots;i++) {
1462 ret = sdhci_probe_slot(pdev, i);
1463 if (ret) {
1464 for (i--;i >= 0;i--)
1465 sdhci_remove_slot(pdev, i);
1466 goto free;
1467 }
1468 }
1469
1470 return 0;
1471
1472free:
1473 pci_set_drvdata(pdev, NULL);
1474 kfree(chip);
1475
1476err:
1477 pci_disable_device(pdev);
1478 return ret;
1479}
1480
1481static void __devexit sdhci_remove(struct pci_dev *pdev)
1482{
1483 int i;
1484 struct sdhci_chip *chip;
1485
1486 chip = pci_get_drvdata(pdev);
1487
1488 if (chip) {
1489 for (i = 0;i < chip->num_slots;i++)
1490 sdhci_remove_slot(pdev, i);
1491
1492 pci_set_drvdata(pdev, NULL);
1493
1494 kfree(chip);
1495 }
1496
1497 pci_disable_device(pdev);
1498}
1499
1500static struct pci_driver sdhci_driver = {
1501 .name = DRIVER_NAME,
1502 .id_table = pci_ids,
1503 .probe = sdhci_probe,
1504 .remove = __devexit_p(sdhci_remove),
1505 .suspend = sdhci_suspend,
1506 .resume = sdhci_resume,
1507};
1508
1509/*****************************************************************************\
1510 * *
1511 * Driver init/exit *
1512 * *
1513\*****************************************************************************/
1514
1515static int __init sdhci_drv_init(void)
1516{
1517 printk(KERN_INFO DRIVER_NAME
52fbf9c9 1518 ": Secure Digital Host Controller Interface driver\n");
d129bceb
PO		 1519 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1520
1521 return pci_register_driver(&sdhci_driver);
1522}
1523
1524static void __exit sdhci_drv_exit(void)
1525{
1526 DBG("Exiting\n");
1527
1528 pci_unregister_driver(&sdhci_driver);
1529}
1530
1531module_init(sdhci_drv_init);
1532module_exit(sdhci_drv_exit);
1533
67435274
PO		 1534module_param(debug_nodma, uint, 0444);
1535module_param(debug_forcedma, uint, 0444);
df673b22 1536module_param(debug_quirks, uint, 0444);
67435274 1537
d129bceb
PO		 1538MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1539MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
d129bceb 1540MODULE_LICENSE("GPL");
67435274
PO		 1541
1542MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
1543MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
df673b22 1544MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
Linux 6.x block layer and io_uring tree(s)