1 /* linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface
2 *
3 * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
9 *
10 * Thanks to the following companies for their support:
11 *
12 * - JMicron (hardware and technical support)
13 */
14
15 #include <linux/delay.h>
16 #include <linux/highmem.h>
17 #include <linux/module.h>
18 #include <linux/pci.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/slab.h>
21 #include <linux/device.h>
22 #include <linux/mmc/host.h>
23 #include <linux/scatterlist.h>
24 #include <linux/io.h>
25 #include <linux/gpio.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/mmc/sdhci-pci-data.h>
28
29 #include "sdhci.h"
30
31 /*
32 * PCI device IDs
33 */
34 #define PCI_DEVICE_ID_INTEL_PCH_SDIO0 0x8809
35 #define PCI_DEVICE_ID_INTEL_PCH_SDIO1 0x880a
36 #define PCI_DEVICE_ID_INTEL_BYT_EMMC 0x0f14
37 #define PCI_DEVICE_ID_INTEL_BYT_SDIO 0x0f15
38 #define PCI_DEVICE_ID_INTEL_BYT_SD 0x0f16
39
40 /*
41 * PCI registers
42 */
43
44 #define PCI_SDHCI_IFPIO 0x00
45 #define PCI_SDHCI_IFDMA 0x01
46 #define PCI_SDHCI_IFVENDOR 0x02
47
48 #define PCI_SLOT_INFO 0x40 /* 8 bits */
49 #define PCI_SLOT_INFO_SLOTS(x) ((x >> 4) & 7)
50 #define PCI_SLOT_INFO_FIRST_BAR_MASK 0x07
51
52 #define MAX_SLOTS 8
53
54 struct sdhci_pci_chip;
55 struct sdhci_pci_slot;
56
57 struct sdhci_pci_fixes {
58 unsigned int quirks;
59 unsigned int quirks2;
60 bool allow_runtime_pm;
61
62 int (*probe) (struct sdhci_pci_chip *);
63
64 int (*probe_slot) (struct sdhci_pci_slot *);
65 void (*remove_slot) (struct sdhci_pci_slot *, int);
66
67 int (*suspend) (struct sdhci_pci_chip *);
68 int (*resume) (struct sdhci_pci_chip *);
69 };
70
71 struct sdhci_pci_slot {
72 struct sdhci_pci_chip *chip;
73 struct sdhci_host *host;
74 struct sdhci_pci_data *data;
75
76 int pci_bar;
77 int rst_n_gpio;
78 int cd_gpio;
79 int cd_irq;
80 };
81
82 struct sdhci_pci_chip {
83 struct pci_dev *pdev;
84
85 unsigned int quirks;
86 unsigned int quirks2;
87 bool allow_runtime_pm;
88 const struct sdhci_pci_fixes *fixes;
89
90 int num_slots; /* Slots on controller */
91 struct sdhci_pci_slot *slots[MAX_SLOTS]; /* Pointers to host slots */
92 };
93
94
95 /*****************************************************************************\
96 * *
97 * Hardware specific quirk handling *
98 * *
99 \*****************************************************************************/
100
ricoh_probe(struct sdhci_pci_chip * chip)101 static int ricoh_probe(struct sdhci_pci_chip *chip)
102 {
103 if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
104 chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
105 chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
106 return 0;
107 }
108
ricoh_mmc_probe_slot(struct sdhci_pci_slot * slot)109 static int ricoh_mmc_probe_slot(struct sdhci_pci_slot *slot)
110 {
111 slot->host->caps =
112 ((0x21 << SDHCI_TIMEOUT_CLK_SHIFT)
113 & SDHCI_TIMEOUT_CLK_MASK) |
114
115 ((0x21 << SDHCI_CLOCK_BASE_SHIFT)
116 & SDHCI_CLOCK_BASE_MASK) |
117
118 SDHCI_TIMEOUT_CLK_UNIT |
119 SDHCI_CAN_VDD_330 |
120 SDHCI_CAN_DO_HISPD |
121 SDHCI_CAN_DO_SDMA;
122 return 0;
123 }
124
ricoh_mmc_resume(struct sdhci_pci_chip * chip)125 static int ricoh_mmc_resume(struct sdhci_pci_chip *chip)
126 {
127 /* Apply a delay to allow controller to settle */
128 /* Otherwise it becomes confused if card state changed
129 during suspend */
130 msleep(500);
131 return 0;
132 }
133
134 static const struct sdhci_pci_fixes sdhci_ricoh = {
135 .probe = ricoh_probe,
136 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
137 SDHCI_QUIRK_FORCE_DMA |
138 SDHCI_QUIRK_CLOCK_BEFORE_RESET,
139 };
140
141 static const struct sdhci_pci_fixes sdhci_ricoh_mmc = {
142 .probe_slot = ricoh_mmc_probe_slot,
143 .resume = ricoh_mmc_resume,
144 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
145 SDHCI_QUIRK_CLOCK_BEFORE_RESET |
146 SDHCI_QUIRK_NO_CARD_NO_RESET |
147 SDHCI_QUIRK_MISSING_CAPS
148 };
149
150 static const struct sdhci_pci_fixes sdhci_ene_712 = {
151 .quirks = SDHCI_QUIRK_SINGLE_POWER_WRITE |
152 SDHCI_QUIRK_BROKEN_DMA,
153 };
154
155 static const struct sdhci_pci_fixes sdhci_ene_714 = {
156 .quirks = SDHCI_QUIRK_SINGLE_POWER_WRITE |
157 SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
158 SDHCI_QUIRK_BROKEN_DMA,
159 };
160
161 static const struct sdhci_pci_fixes sdhci_cafe = {
162 .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
163 SDHCI_QUIRK_NO_BUSY_IRQ |
164 SDHCI_QUIRK_BROKEN_CARD_DETECTION |
165 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
166 };
167
mrst_hc_probe_slot(struct sdhci_pci_slot * slot)168 static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
169 {
170 slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
171 return 0;
172 }
173
174 /*
175 * ADMA operation is disabled for Moorestown platform due to
176 * hardware bugs.
177 */
mrst_hc_probe(struct sdhci_pci_chip * chip)178 static int mrst_hc_probe(struct sdhci_pci_chip *chip)
179 {
180 /*
181 * slots number is fixed here for MRST as SDIO3/5 are never used and
182 * have hardware bugs.
183 */
184 chip->num_slots = 1;
185 return 0;
186 }
187
pch_hc_probe_slot(struct sdhci_pci_slot * slot)188 static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
189 {
190 slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
191 return 0;
192 }
193
194 #ifdef CONFIG_PM_RUNTIME
195
sdhci_pci_sd_cd(int irq,void * dev_id)196 static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
197 {
198 struct sdhci_pci_slot *slot = dev_id;
199 struct sdhci_host *host = slot->host;
200
201 mmc_detect_change(host->mmc, msecs_to_jiffies(200));
202 return IRQ_HANDLED;
203 }
204
sdhci_pci_add_own_cd(struct sdhci_pci_slot * slot)205 static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
206 {
207 int err, irq, gpio = slot->cd_gpio;
208
209 slot->cd_gpio = -EINVAL;
210 slot->cd_irq = -EINVAL;
211
212 if (!gpio_is_valid(gpio))
213 return;
214
215 err = gpio_request(gpio, "sd_cd");
216 if (err < 0)
217 goto out;
218
219 err = gpio_direction_input(gpio);
220 if (err < 0)
221 goto out_free;
222
223 irq = gpio_to_irq(gpio);
224 if (irq < 0)
225 goto out_free;
226
227 err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
228 IRQF_TRIGGER_FALLING, "sd_cd", slot);
229 if (err)
230 goto out_free;
231
232 slot->cd_gpio = gpio;
233 slot->cd_irq = irq;
234
235 return;
236
237 out_free:
238 gpio_free(gpio);
239 out:
240 dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
241 }
242
sdhci_pci_remove_own_cd(struct sdhci_pci_slot * slot)243 static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
244 {
245 if (slot->cd_irq >= 0)
246 free_irq(slot->cd_irq, slot);
247 if (gpio_is_valid(slot->cd_gpio))
248 gpio_free(slot->cd_gpio);
249 }
250
251 #else
252
sdhci_pci_add_own_cd(struct sdhci_pci_slot * slot)253 static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
254 {
255 }
256
sdhci_pci_remove_own_cd(struct sdhci_pci_slot * slot)257 static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
258 {
259 }
260
261 #endif
262
mfd_emmc_probe_slot(struct sdhci_pci_slot * slot)263 static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
264 {
265 slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
266 slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC |
267 MMC_CAP2_HC_ERASE_SZ;
268 return 0;
269 }
270
mfd_sdio_probe_slot(struct sdhci_pci_slot * slot)271 static int mfd_sdio_probe_slot(struct sdhci_pci_slot *slot)
272 {
273 slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE;
274 return 0;
275 }
276
277 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
278 .quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
279 .probe_slot = mrst_hc_probe_slot,
280 };
281
282 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
283 .quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
284 .probe = mrst_hc_probe,
285 };
286
287 static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
288 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
289 .allow_runtime_pm = true,
290 };
291
292 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
293 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
294 .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
295 .allow_runtime_pm = true,
296 .probe_slot = mfd_sdio_probe_slot,
297 };
298
299 static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
300 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
301 .allow_runtime_pm = true,
302 .probe_slot = mfd_emmc_probe_slot,
303 };
304
305 static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
306 .quirks = SDHCI_QUIRK_BROKEN_ADMA,
307 .probe_slot = pch_hc_probe_slot,
308 };
309
byt_emmc_probe_slot(struct sdhci_pci_slot * slot)310 static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
311 {
312 slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
313 slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
314 return 0;
315 }
316
byt_sdio_probe_slot(struct sdhci_pci_slot * slot)317 static int byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
318 {
319 slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE;
320 return 0;
321 }
322
323 static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
324 .allow_runtime_pm = true,
325 .probe_slot = byt_emmc_probe_slot,
326 };
327
328 static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
329 .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
330 .allow_runtime_pm = true,
331 .probe_slot = byt_sdio_probe_slot,
332 };
333
334 static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
335 };
336
337 /* O2Micro extra registers */
338 #define O2_SD_LOCK_WP 0xD3
339 #define O2_SD_MULTI_VCC3V 0xEE
340 #define O2_SD_CLKREQ 0xEC
341 #define O2_SD_CAPS 0xE0
342 #define O2_SD_ADMA1 0xE2
343 #define O2_SD_ADMA2 0xE7
344 #define O2_SD_INF_MOD 0xF1
345
o2_probe(struct sdhci_pci_chip * chip)346 static int o2_probe(struct sdhci_pci_chip *chip)
347 {
348 int ret;
349 u8 scratch;
350
351 switch (chip->pdev->device) {
352 case PCI_DEVICE_ID_O2_8220:
353 case PCI_DEVICE_ID_O2_8221:
354 case PCI_DEVICE_ID_O2_8320:
355 case PCI_DEVICE_ID_O2_8321:
356 /* This extra setup is required due to broken ADMA. */
357 ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
358 if (ret)
359 return ret;
360 scratch &= 0x7f;
361 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
362
363 /* Set Multi 3 to VCC3V# */
364 pci_write_config_byte(chip->pdev, O2_SD_MULTI_VCC3V, 0x08);
365
366 /* Disable CLK_REQ# support after media DET */
367 ret = pci_read_config_byte(chip->pdev, O2_SD_CLKREQ, &scratch);
368 if (ret)
369 return ret;
370 scratch |= 0x20;
371 pci_write_config_byte(chip->pdev, O2_SD_CLKREQ, scratch);
372
373 /* Choose capabilities, enable SDMA. We have to write 0x01
374 * to the capabilities register first to unlock it.
375 */
376 ret = pci_read_config_byte(chip->pdev, O2_SD_CAPS, &scratch);
377 if (ret)
378 return ret;
379 scratch |= 0x01;
380 pci_write_config_byte(chip->pdev, O2_SD_CAPS, scratch);
381 pci_write_config_byte(chip->pdev, O2_SD_CAPS, 0x73);
382
383 /* Disable ADMA1/2 */
384 pci_write_config_byte(chip->pdev, O2_SD_ADMA1, 0x39);
385 pci_write_config_byte(chip->pdev, O2_SD_ADMA2, 0x08);
386
387 /* Disable the infinite transfer mode */
388 ret = pci_read_config_byte(chip->pdev, O2_SD_INF_MOD, &scratch);
389 if (ret)
390 return ret;
391 scratch |= 0x08;
392 pci_write_config_byte(chip->pdev, O2_SD_INF_MOD, scratch);
393
394 /* Lock WP */
395 ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
396 if (ret)
397 return ret;
398 scratch |= 0x80;
399 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
400 }
401
402 return 0;
403 }
404
jmicron_pmos(struct sdhci_pci_chip * chip,int on)405 static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
406 {
407 u8 scratch;
408 int ret;
409
410 ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
411 if (ret)
412 return ret;
413
414 /*
415 * Turn PMOS on [bit 0], set over current detection to 2.4 V
416 * [bit 1:2] and enable over current debouncing [bit 6].
417 */
418 if (on)
419 scratch |= 0x47;
420 else
421 scratch &= ~0x47;
422
423 ret = pci_write_config_byte(chip->pdev, 0xAE, scratch);
424 if (ret)
425 return ret;
426
427 return 0;
428 }
429
jmicron_probe(struct sdhci_pci_chip * chip)430 static int jmicron_probe(struct sdhci_pci_chip *chip)
431 {
432 int ret;
433 u16 mmcdev = 0;
434
435 if (chip->pdev->revision == 0) {
436 chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
437 SDHCI_QUIRK_32BIT_DMA_SIZE |
438 SDHCI_QUIRK_32BIT_ADMA_SIZE |
439 SDHCI_QUIRK_RESET_AFTER_REQUEST |
440 SDHCI_QUIRK_BROKEN_SMALL_PIO;
441 }
442
443 /*
444 * JMicron chips can have two interfaces to the same hardware
445 * in order to work around limitations in Microsoft's driver.
446 * We need to make sure we only bind to one of them.
447 *
448 * This code assumes two things:
449 *
450 * 1. The PCI code adds subfunctions in order.
451 *
452 * 2. The MMC interface has a lower subfunction number
453 * than the SD interface.
454 */
455 if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD)
456 mmcdev = PCI_DEVICE_ID_JMICRON_JMB38X_MMC;
457 else if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD)
458 mmcdev = PCI_DEVICE_ID_JMICRON_JMB388_ESD;
459
460 if (mmcdev) {
461 struct pci_dev *sd_dev;
462
463 sd_dev = NULL;
464 while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
465 mmcdev, sd_dev)) != NULL) {
466 if ((PCI_SLOT(chip->pdev->devfn) ==
467 PCI_SLOT(sd_dev->devfn)) &&
468 (chip->pdev->bus == sd_dev->bus))
469 break;
470 }
471
472 if (sd_dev) {
473 pci_dev_put(sd_dev);
474 dev_info(&chip->pdev->dev, "Refusing to bind to "
475 "secondary interface.\n");
476 return -ENODEV;
477 }
478 }
479
480 /*
481 * JMicron chips need a bit of a nudge to enable the power
482 * output pins.
483 */
484 ret = jmicron_pmos(chip, 1);
485 if (ret) {
486 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
487 return ret;
488 }
489
490 /* quirk for unsable RO-detection on JM388 chips */
491 if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD ||
492 chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
493 chip->quirks |= SDHCI_QUIRK_UNSTABLE_RO_DETECT;
494
495 return 0;
496 }
497
jmicron_enable_mmc(struct sdhci_host * host,int on)498 static void jmicron_enable_mmc(struct sdhci_host *host, int on)
499 {
500 u8 scratch;
501
502 scratch = readb(host->ioaddr + 0xC0);
503
504 if (on)
505 scratch |= 0x01;
506 else
507 scratch &= ~0x01;
508
509 writeb(scratch, host->ioaddr + 0xC0);
510 }
511
jmicron_probe_slot(struct sdhci_pci_slot * slot)512 static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
513 {
514 if (slot->chip->pdev->revision == 0) {
515 u16 version;
516
517 version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
518 version = (version & SDHCI_VENDOR_VER_MASK) >>
519 SDHCI_VENDOR_VER_SHIFT;
520
521 /*
522 * Older versions of the chip have lots of nasty glitches
523 * in the ADMA engine. It's best just to avoid it
524 * completely.
525 */
526 if (version < 0xAC)
527 slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
528 }
529
530 /* JM388 MMC doesn't support 1.8V while SD supports it */
531 if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
532 slot->host->ocr_avail_sd = MMC_VDD_32_33 | MMC_VDD_33_34 |
533 MMC_VDD_29_30 | MMC_VDD_30_31 |
534 MMC_VDD_165_195; /* allow 1.8V */
535 slot->host->ocr_avail_mmc = MMC_VDD_32_33 | MMC_VDD_33_34 |
536 MMC_VDD_29_30 | MMC_VDD_30_31; /* no 1.8V for MMC */
537 }
538
539 /*
540 * The secondary interface requires a bit set to get the
541 * interrupts.
542 */
543 if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
544 slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
545 jmicron_enable_mmc(slot->host, 1);
546
547 slot->host->mmc->caps |= MMC_CAP_BUS_WIDTH_TEST;
548
549 return 0;
550 }
551
jmicron_remove_slot(struct sdhci_pci_slot * slot,int dead)552 static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
553 {
554 if (dead)
555 return;
556
557 if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
558 slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
559 jmicron_enable_mmc(slot->host, 0);
560 }
561
jmicron_suspend(struct sdhci_pci_chip * chip)562 static int jmicron_suspend(struct sdhci_pci_chip *chip)
563 {
564 int i;
565
566 if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
567 chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
568 for (i = 0; i < chip->num_slots; i++)
569 jmicron_enable_mmc(chip->slots[i]->host, 0);
570 }
571
572 return 0;
573 }
574
jmicron_resume(struct sdhci_pci_chip * chip)575 static int jmicron_resume(struct sdhci_pci_chip *chip)
576 {
577 int ret, i;
578
579 if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
580 chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
581 for (i = 0; i < chip->num_slots; i++)
582 jmicron_enable_mmc(chip->slots[i]->host, 1);
583 }
584
585 ret = jmicron_pmos(chip, 1);
586 if (ret) {
587 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
588 return ret;
589 }
590
591 return 0;
592 }
593
594 static const struct sdhci_pci_fixes sdhci_o2 = {
595 .probe = o2_probe,
596 };
597
598 static const struct sdhci_pci_fixes sdhci_jmicron = {
599 .probe = jmicron_probe,
600
601 .probe_slot = jmicron_probe_slot,
602 .remove_slot = jmicron_remove_slot,
603
604 .suspend = jmicron_suspend,
605 .resume = jmicron_resume,
606 };
607
608 /* SysKonnect CardBus2SDIO extra registers */
609 #define SYSKT_CTRL 0x200
610 #define SYSKT_RDFIFO_STAT 0x204
611 #define SYSKT_WRFIFO_STAT 0x208
612 #define SYSKT_POWER_DATA 0x20c
613 #define SYSKT_POWER_330 0xef
614 #define SYSKT_POWER_300 0xf8
615 #define SYSKT_POWER_184 0xcc
616 #define SYSKT_POWER_CMD 0x20d
617 #define SYSKT_POWER_START (1 << 7)
618 #define SYSKT_POWER_STATUS 0x20e
619 #define SYSKT_POWER_STATUS_OK (1 << 0)
620 #define SYSKT_BOARD_REV 0x210
621 #define SYSKT_CHIP_REV 0x211
622 #define SYSKT_CONF_DATA 0x212
623 #define SYSKT_CONF_DATA_1V8 (1 << 2)
624 #define SYSKT_CONF_DATA_2V5 (1 << 1)
625 #define SYSKT_CONF_DATA_3V3 (1 << 0)
626
syskt_probe(struct sdhci_pci_chip * chip)627 static int syskt_probe(struct sdhci_pci_chip *chip)
628 {
629 if ((chip->pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
630 chip->pdev->class &= ~0x0000FF;
631 chip->pdev->class |= PCI_SDHCI_IFDMA;
632 }
633 return 0;
634 }
635
syskt_probe_slot(struct sdhci_pci_slot * slot)636 static int syskt_probe_slot(struct sdhci_pci_slot *slot)
637 {
638 int tm, ps;
639
640 u8 board_rev = readb(slot->host->ioaddr + SYSKT_BOARD_REV);
641 u8 chip_rev = readb(slot->host->ioaddr + SYSKT_CHIP_REV);
642 dev_info(&slot->chip->pdev->dev, "SysKonnect CardBus2SDIO, "
643 "board rev %d.%d, chip rev %d.%d\n",
644 board_rev >> 4, board_rev & 0xf,
645 chip_rev >> 4, chip_rev & 0xf);
646 if (chip_rev >= 0x20)
647 slot->host->quirks |= SDHCI_QUIRK_FORCE_DMA;
648
649 writeb(SYSKT_POWER_330, slot->host->ioaddr + SYSKT_POWER_DATA);
650 writeb(SYSKT_POWER_START, slot->host->ioaddr + SYSKT_POWER_CMD);
651 udelay(50);
652 tm = 10; /* Wait max 1 ms */
653 do {
654 ps = readw(slot->host->ioaddr + SYSKT_POWER_STATUS);
655 if (ps & SYSKT_POWER_STATUS_OK)
656 break;
657 udelay(100);
658 } while (--tm);
659 if (!tm) {
660 dev_err(&slot->chip->pdev->dev,
661 "power regulator never stabilized");
662 writeb(0, slot->host->ioaddr + SYSKT_POWER_CMD);
663 return -ENODEV;
664 }
665
666 return 0;
667 }
668
669 static const struct sdhci_pci_fixes sdhci_syskt = {
670 .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER,
671 .probe = syskt_probe,
672 .probe_slot = syskt_probe_slot,
673 };
674
via_probe(struct sdhci_pci_chip * chip)675 static int via_probe(struct sdhci_pci_chip *chip)
676 {
677 if (chip->pdev->revision == 0x10)
678 chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
679
680 return 0;
681 }
682
683 static const struct sdhci_pci_fixes sdhci_via = {
684 .probe = via_probe,
685 };
686
687 static const struct pci_device_id pci_ids[] = {
688 {
689 .vendor = PCI_VENDOR_ID_RICOH,
690 .device = PCI_DEVICE_ID_RICOH_R5C822,
691 .subvendor = PCI_ANY_ID,
692 .subdevice = PCI_ANY_ID,
693 .driver_data = (kernel_ulong_t)&sdhci_ricoh,
694 },
695
696 {
697 .vendor = PCI_VENDOR_ID_RICOH,
698 .device = 0x843,
699 .subvendor = PCI_ANY_ID,
700 .subdevice = PCI_ANY_ID,
701 .driver_data = (kernel_ulong_t)&sdhci_ricoh_mmc,
702 },
703
704 {
705 .vendor = PCI_VENDOR_ID_RICOH,
706 .device = 0xe822,
707 .subvendor = PCI_ANY_ID,
708 .subdevice = PCI_ANY_ID,
709 .driver_data = (kernel_ulong_t)&sdhci_ricoh_mmc,
710 },
711
712 {
713 .vendor = PCI_VENDOR_ID_RICOH,
714 .device = 0xe823,
715 .subvendor = PCI_ANY_ID,
716 .subdevice = PCI_ANY_ID,
717 .driver_data = (kernel_ulong_t)&sdhci_ricoh_mmc,
718 },
719
720 {
721 .vendor = PCI_VENDOR_ID_ENE,
722 .device = PCI_DEVICE_ID_ENE_CB712_SD,
723 .subvendor = PCI_ANY_ID,
724 .subdevice = PCI_ANY_ID,
725 .driver_data = (kernel_ulong_t)&sdhci_ene_712,
726 },
727
728 {
729 .vendor = PCI_VENDOR_ID_ENE,
730 .device = PCI_DEVICE_ID_ENE_CB712_SD_2,
731 .subvendor = PCI_ANY_ID,
732 .subdevice = PCI_ANY_ID,
733 .driver_data = (kernel_ulong_t)&sdhci_ene_712,
734 },
735
736 {
737 .vendor = PCI_VENDOR_ID_ENE,
738 .device = PCI_DEVICE_ID_ENE_CB714_SD,
739 .subvendor = PCI_ANY_ID,
740 .subdevice = PCI_ANY_ID,
741 .driver_data = (kernel_ulong_t)&sdhci_ene_714,
742 },
743
744 {
745 .vendor = PCI_VENDOR_ID_ENE,
746 .device = PCI_DEVICE_ID_ENE_CB714_SD_2,
747 .subvendor = PCI_ANY_ID,
748 .subdevice = PCI_ANY_ID,
749 .driver_data = (kernel_ulong_t)&sdhci_ene_714,
750 },
751
752 {
753 .vendor = PCI_VENDOR_ID_MARVELL,
754 .device = PCI_DEVICE_ID_MARVELL_88ALP01_SD,
755 .subvendor = PCI_ANY_ID,
756 .subdevice = PCI_ANY_ID,
757 .driver_data = (kernel_ulong_t)&sdhci_cafe,
758 },
759
760 {
761 .vendor = PCI_VENDOR_ID_JMICRON,
762 .device = PCI_DEVICE_ID_JMICRON_JMB38X_SD,
763 .subvendor = PCI_ANY_ID,
764 .subdevice = PCI_ANY_ID,
765 .driver_data = (kernel_ulong_t)&sdhci_jmicron,
766 },
767
768 {
769 .vendor = PCI_VENDOR_ID_JMICRON,
770 .device = PCI_DEVICE_ID_JMICRON_JMB38X_MMC,
771 .subvendor = PCI_ANY_ID,
772 .subdevice = PCI_ANY_ID,
773 .driver_data = (kernel_ulong_t)&sdhci_jmicron,
774 },
775
776 {
777 .vendor = PCI_VENDOR_ID_JMICRON,
778 .device = PCI_DEVICE_ID_JMICRON_JMB388_SD,
779 .subvendor = PCI_ANY_ID,
780 .subdevice = PCI_ANY_ID,
781 .driver_data = (kernel_ulong_t)&sdhci_jmicron,
782 },
783
784 {
785 .vendor = PCI_VENDOR_ID_JMICRON,
786 .device = PCI_DEVICE_ID_JMICRON_JMB388_ESD,
787 .subvendor = PCI_ANY_ID,
788 .subdevice = PCI_ANY_ID,
789 .driver_data = (kernel_ulong_t)&sdhci_jmicron,
790 },
791
792 {
793 .vendor = PCI_VENDOR_ID_SYSKONNECT,
794 .device = 0x8000,
795 .subvendor = PCI_ANY_ID,
796 .subdevice = PCI_ANY_ID,
797 .driver_data = (kernel_ulong_t)&sdhci_syskt,
798 },
799
800 {
801 .vendor = PCI_VENDOR_ID_VIA,
802 .device = 0x95d0,
803 .subvendor = PCI_ANY_ID,
804 .subdevice = PCI_ANY_ID,
805 .driver_data = (kernel_ulong_t)&sdhci_via,
806 },
807
808 {
809 .vendor = PCI_VENDOR_ID_INTEL,
810 .device = PCI_DEVICE_ID_INTEL_MRST_SD0,
811 .subvendor = PCI_ANY_ID,
812 .subdevice = PCI_ANY_ID,
813 .driver_data = (kernel_ulong_t)&sdhci_intel_mrst_hc0,
814 },
815
816 {
817 .vendor = PCI_VENDOR_ID_INTEL,
818 .device = PCI_DEVICE_ID_INTEL_MRST_SD1,
819 .subvendor = PCI_ANY_ID,
820 .subdevice = PCI_ANY_ID,
821 .driver_data = (kernel_ulong_t)&sdhci_intel_mrst_hc1_hc2,
822 },
823
824 {
825 .vendor = PCI_VENDOR_ID_INTEL,
826 .device = PCI_DEVICE_ID_INTEL_MRST_SD2,
827 .subvendor = PCI_ANY_ID,
828 .subdevice = PCI_ANY_ID,
829 .driver_data = (kernel_ulong_t)&sdhci_intel_mrst_hc1_hc2,
830 },
831
832 {
833 .vendor = PCI_VENDOR_ID_INTEL,
834 .device = PCI_DEVICE_ID_INTEL_MFD_SD,
835 .subvendor = PCI_ANY_ID,
836 .subdevice = PCI_ANY_ID,
837 .driver_data = (kernel_ulong_t)&sdhci_intel_mfd_sd,
838 },
839
840 {
841 .vendor = PCI_VENDOR_ID_INTEL,
842 .device = PCI_DEVICE_ID_INTEL_MFD_SDIO1,
843 .subvendor = PCI_ANY_ID,
844 .subdevice = PCI_ANY_ID,
845 .driver_data = (kernel_ulong_t)&sdhci_intel_mfd_sdio,
846 },
847
848 {
849 .vendor = PCI_VENDOR_ID_INTEL,
850 .device = PCI_DEVICE_ID_INTEL_MFD_SDIO2,
851 .subvendor = PCI_ANY_ID,
852 .subdevice = PCI_ANY_ID,
853 .driver_data = (kernel_ulong_t)&sdhci_intel_mfd_sdio,
854 },
855
856 {
857 .vendor = PCI_VENDOR_ID_INTEL,
858 .device = PCI_DEVICE_ID_INTEL_MFD_EMMC0,
859 .subvendor = PCI_ANY_ID,
860 .subdevice = PCI_ANY_ID,
861 .driver_data = (kernel_ulong_t)&sdhci_intel_mfd_emmc,
862 },
863
864 {
865 .vendor = PCI_VENDOR_ID_INTEL,
866 .device = PCI_DEVICE_ID_INTEL_MFD_EMMC1,
867 .subvendor = PCI_ANY_ID,
868 .subdevice = PCI_ANY_ID,
869 .driver_data = (kernel_ulong_t)&sdhci_intel_mfd_emmc,
870 },
871
872 {
873 .vendor = PCI_VENDOR_ID_INTEL,
874 .device = PCI_DEVICE_ID_INTEL_PCH_SDIO0,
875 .subvendor = PCI_ANY_ID,
876 .subdevice = PCI_ANY_ID,
877 .driver_data = (kernel_ulong_t)&sdhci_intel_pch_sdio,
878 },
879
880 {
881 .vendor = PCI_VENDOR_ID_INTEL,
882 .device = PCI_DEVICE_ID_INTEL_PCH_SDIO1,
883 .subvendor = PCI_ANY_ID,
884 .subdevice = PCI_ANY_ID,
885 .driver_data = (kernel_ulong_t)&sdhci_intel_pch_sdio,
886 },
887
888 {
889 .vendor = PCI_VENDOR_ID_INTEL,
890 .device = PCI_DEVICE_ID_INTEL_BYT_EMMC,
891 .subvendor = PCI_ANY_ID,
892 .subdevice = PCI_ANY_ID,
893 .driver_data = (kernel_ulong_t)&sdhci_intel_byt_emmc,
894 },
895
896 {
897 .vendor = PCI_VENDOR_ID_INTEL,
898 .device = PCI_DEVICE_ID_INTEL_BYT_SDIO,
899 .subvendor = PCI_ANY_ID,
900 .subdevice = PCI_ANY_ID,
901 .driver_data = (kernel_ulong_t)&sdhci_intel_byt_sdio,
902 },
903
904 {
905 .vendor = PCI_VENDOR_ID_INTEL,
906 .device = PCI_DEVICE_ID_INTEL_BYT_SD,
907 .subvendor = PCI_ANY_ID,
908 .subdevice = PCI_ANY_ID,
909 .driver_data = (kernel_ulong_t)&sdhci_intel_byt_sd,
910 },
911
912 {
913 .vendor = PCI_VENDOR_ID_O2,
914 .device = PCI_DEVICE_ID_O2_8120,
915 .subvendor = PCI_ANY_ID,
916 .subdevice = PCI_ANY_ID,
917 .driver_data = (kernel_ulong_t)&sdhci_o2,
918 },
919
920 {
921 .vendor = PCI_VENDOR_ID_O2,
922 .device = PCI_DEVICE_ID_O2_8220,
923 .subvendor = PCI_ANY_ID,
924 .subdevice = PCI_ANY_ID,
925 .driver_data = (kernel_ulong_t)&sdhci_o2,
926 },
927
928 {
929 .vendor = PCI_VENDOR_ID_O2,
930 .device = PCI_DEVICE_ID_O2_8221,
931 .subvendor = PCI_ANY_ID,
932 .subdevice = PCI_ANY_ID,
933 .driver_data = (kernel_ulong_t)&sdhci_o2,
934 },
935
936 {
937 .vendor = PCI_VENDOR_ID_O2,
938 .device = PCI_DEVICE_ID_O2_8320,
939 .subvendor = PCI_ANY_ID,
940 .subdevice = PCI_ANY_ID,
941 .driver_data = (kernel_ulong_t)&sdhci_o2,
942 },
943
944 {
945 .vendor = PCI_VENDOR_ID_O2,
946 .device = PCI_DEVICE_ID_O2_8321,
947 .subvendor = PCI_ANY_ID,
948 .subdevice = PCI_ANY_ID,
949 .driver_data = (kernel_ulong_t)&sdhci_o2,
950 },
951
952 { /* Generic SD host controller */
953 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
954 },
955
956 { /* end: all zeroes */ },
957 };
958
959 MODULE_DEVICE_TABLE(pci, pci_ids);
960
961 /*****************************************************************************\
962 * *
963 * SDHCI core callbacks *
964 * *
965 \*****************************************************************************/
966
sdhci_pci_enable_dma(struct sdhci_host * host)967 static int sdhci_pci_enable_dma(struct sdhci_host *host)
968 {
969 struct sdhci_pci_slot *slot;
970 struct pci_dev *pdev;
971 int ret;
972
973 slot = sdhci_priv(host);
974 pdev = slot->chip->pdev;
975
976 if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
977 ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
978 (host->flags & SDHCI_USE_SDMA)) {
979 dev_warn(&pdev->dev, "Will use DMA mode even though HW "
980 "doesn't fully claim to support it.\n");
981 }
982
983 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
984 if (ret)
985 return ret;
986
987 pci_set_master(pdev);
988
989 return 0;
990 }
991
sdhci_pci_bus_width(struct sdhci_host * host,int width)992 static int sdhci_pci_bus_width(struct sdhci_host *host, int width)
993 {
994 u8 ctrl;
995
996 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
997
998 switch (width) {
999 case MMC_BUS_WIDTH_8:
1000 ctrl |= SDHCI_CTRL_8BITBUS;
1001 ctrl &= ~SDHCI_CTRL_4BITBUS;
1002 break;
1003 case MMC_BUS_WIDTH_4:
1004 ctrl |= SDHCI_CTRL_4BITBUS;
1005 ctrl &= ~SDHCI_CTRL_8BITBUS;
1006 break;
1007 default:
1008 ctrl &= ~(SDHCI_CTRL_8BITBUS | SDHCI_CTRL_4BITBUS);
1009 break;
1010 }
1011
1012 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1013
1014 return 0;
1015 }
1016
sdhci_pci_hw_reset(struct sdhci_host * host)1017 static void sdhci_pci_hw_reset(struct sdhci_host *host)
1018 {
1019 struct sdhci_pci_slot *slot = sdhci_priv(host);
1020 int rst_n_gpio = slot->rst_n_gpio;
1021
1022 if (!gpio_is_valid(rst_n_gpio))
1023 return;
1024 gpio_set_value_cansleep(rst_n_gpio, 0);
1025 /* For eMMC, minimum is 1us but give it 10us for good measure */
1026 udelay(10);
1027 gpio_set_value_cansleep(rst_n_gpio, 1);
1028 /* For eMMC, minimum is 200us but give it 300us for good measure */
1029 usleep_range(300, 1000);
1030 }
1031
1032 static const struct sdhci_ops sdhci_pci_ops = {
1033 .enable_dma = sdhci_pci_enable_dma,
1034 .platform_bus_width = sdhci_pci_bus_width,
1035 .hw_reset = sdhci_pci_hw_reset,
1036 };
1037
1038 /*****************************************************************************\
1039 * *
1040 * Suspend/resume *
1041 * *
1042 \*****************************************************************************/
1043
1044 #ifdef CONFIG_PM
1045
sdhci_pci_suspend(struct device * dev)1046 static int sdhci_pci_suspend(struct device *dev)
1047 {
1048 struct pci_dev *pdev = to_pci_dev(dev);
1049 struct sdhci_pci_chip *chip;
1050 struct sdhci_pci_slot *slot;
1051 mmc_pm_flag_t slot_pm_flags;
1052 mmc_pm_flag_t pm_flags = 0;
1053 int i, ret;
1054
1055 chip = pci_get_drvdata(pdev);
1056 if (!chip)
1057 return 0;
1058
1059 for (i = 0; i < chip->num_slots; i++) {
1060 slot = chip->slots[i];
1061 if (!slot)
1062 continue;
1063
1064 ret = sdhci_suspend_host(slot->host);
1065
1066 if (ret)
1067 goto err_pci_suspend;
1068
1069 slot_pm_flags = slot->host->mmc->pm_flags;
1070 if (slot_pm_flags & MMC_PM_WAKE_SDIO_IRQ)
1071 sdhci_enable_irq_wakeups(slot->host);
1072
1073 pm_flags |= slot_pm_flags;
1074 }
1075
1076 if (chip->fixes && chip->fixes->suspend) {
1077 ret = chip->fixes->suspend(chip);
1078 if (ret)
1079 goto err_pci_suspend;
1080 }
1081
1082 pci_save_state(pdev);
1083 if (pm_flags & MMC_PM_KEEP_POWER) {
1084 if (pm_flags & MMC_PM_WAKE_SDIO_IRQ) {
1085 pci_pme_active(pdev, true);
1086 pci_enable_wake(pdev, PCI_D3hot, 1);
1087 }
1088 pci_set_power_state(pdev, PCI_D3hot);
1089 } else {
1090 pci_enable_wake(pdev, PCI_D3hot, 0);
1091 pci_disable_device(pdev);
1092 pci_set_power_state(pdev, PCI_D3hot);
1093 }
1094
1095 return 0;
1096
1097 err_pci_suspend:
1098 while (--i >= 0)
1099 sdhci_resume_host(chip->slots[i]->host);
1100 return ret;
1101 }
1102
sdhci_pci_resume(struct device * dev)1103 static int sdhci_pci_resume(struct device *dev)
1104 {
1105 struct pci_dev *pdev = to_pci_dev(dev);
1106 struct sdhci_pci_chip *chip;
1107 struct sdhci_pci_slot *slot;
1108 int i, ret;
1109
1110 chip = pci_get_drvdata(pdev);
1111 if (!chip)
1112 return 0;
1113
1114 pci_set_power_state(pdev, PCI_D0);
1115 pci_restore_state(pdev);
1116 ret = pci_enable_device(pdev);
1117 if (ret)
1118 return ret;
1119
1120 if (chip->fixes && chip->fixes->resume) {
1121 ret = chip->fixes->resume(chip);
1122 if (ret)
1123 return ret;
1124 }
1125
1126 for (i = 0; i < chip->num_slots; i++) {
1127 slot = chip->slots[i];
1128 if (!slot)
1129 continue;
1130
1131 ret = sdhci_resume_host(slot->host);
1132 if (ret)
1133 return ret;
1134 }
1135
1136 return 0;
1137 }
1138
1139 #else /* CONFIG_PM */
1140
1141 #define sdhci_pci_suspend NULL
1142 #define sdhci_pci_resume NULL
1143
1144 #endif /* CONFIG_PM */
1145
1146 #ifdef CONFIG_PM_RUNTIME
1147
sdhci_pci_runtime_suspend(struct device * dev)1148 static int sdhci_pci_runtime_suspend(struct device *dev)
1149 {
1150 struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
1151 struct sdhci_pci_chip *chip;
1152 struct sdhci_pci_slot *slot;
1153 int i, ret;
1154
1155 chip = pci_get_drvdata(pdev);
1156 if (!chip)
1157 return 0;
1158
1159 for (i = 0; i < chip->num_slots; i++) {
1160 slot = chip->slots[i];
1161 if (!slot)
1162 continue;
1163
1164 ret = sdhci_runtime_suspend_host(slot->host);
1165
1166 if (ret)
1167 goto err_pci_runtime_suspend;
1168 }
1169
1170 if (chip->fixes && chip->fixes->suspend) {
1171 ret = chip->fixes->suspend(chip);
1172 if (ret)
1173 goto err_pci_runtime_suspend;
1174 }
1175
1176 return 0;
1177
1178 err_pci_runtime_suspend:
1179 while (--i >= 0)
1180 sdhci_runtime_resume_host(chip->slots[i]->host);
1181 return ret;
1182 }
1183
sdhci_pci_runtime_resume(struct device * dev)1184 static int sdhci_pci_runtime_resume(struct device *dev)
1185 {
1186 struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
1187 struct sdhci_pci_chip *chip;
1188 struct sdhci_pci_slot *slot;
1189 int i, ret;
1190
1191 chip = pci_get_drvdata(pdev);
1192 if (!chip)
1193 return 0;
1194
1195 if (chip->fixes && chip->fixes->resume) {
1196 ret = chip->fixes->resume(chip);
1197 if (ret)
1198 return ret;
1199 }
1200
1201 for (i = 0; i < chip->num_slots; i++) {
1202 slot = chip->slots[i];
1203 if (!slot)
1204 continue;
1205
1206 ret = sdhci_runtime_resume_host(slot->host);
1207 if (ret)
1208 return ret;
1209 }
1210
1211 return 0;
1212 }
1213
sdhci_pci_runtime_idle(struct device * dev)1214 static int sdhci_pci_runtime_idle(struct device *dev)
1215 {
1216 return 0;
1217 }
1218
1219 #else
1220
1221 #define sdhci_pci_runtime_suspend NULL
1222 #define sdhci_pci_runtime_resume NULL
1223 #define sdhci_pci_runtime_idle NULL
1224
1225 #endif
1226
1227 static const struct dev_pm_ops sdhci_pci_pm_ops = {
1228 .suspend = sdhci_pci_suspend,
1229 .resume = sdhci_pci_resume,
1230 .runtime_suspend = sdhci_pci_runtime_suspend,
1231 .runtime_resume = sdhci_pci_runtime_resume,
1232 .runtime_idle = sdhci_pci_runtime_idle,
1233 };
1234
1235 /*****************************************************************************\
1236 * *
1237 * Device probing/removal *
1238 * *
1239 \*****************************************************************************/
1240
sdhci_pci_probe_slot(struct pci_dev * pdev,struct sdhci_pci_chip * chip,int first_bar,int slotno)1241 static struct sdhci_pci_slot *sdhci_pci_probe_slot(
1242 struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
1243 int slotno)
1244 {
1245 struct sdhci_pci_slot *slot;
1246 struct sdhci_host *host;
1247 int ret, bar = first_bar + slotno;
1248
1249 if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
1250 dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
1251 return ERR_PTR(-ENODEV);
1252 }
1253
1254 if (pci_resource_len(pdev, bar) < 0x100) {
1255 dev_err(&pdev->dev, "Invalid iomem size. You may "
1256 "experience problems.\n");
1257 }
1258
1259 if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1260 dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
1261 return ERR_PTR(-ENODEV);
1262 }
1263
1264 if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1265 dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
1266 return ERR_PTR(-ENODEV);
1267 }
1268
1269 host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot));
1270 if (IS_ERR(host)) {
1271 dev_err(&pdev->dev, "cannot allocate host\n");
1272 return ERR_CAST(host);
1273 }
1274
1275 slot = sdhci_priv(host);
1276
1277 slot->chip = chip;
1278 slot->host = host;
1279 slot->pci_bar = bar;
1280 slot->rst_n_gpio = -EINVAL;
1281 slot->cd_gpio = -EINVAL;
1282
1283 /* Retrieve platform data if there is any */
1284 if (*sdhci_pci_get_data)
1285 slot->data = sdhci_pci_get_data(pdev, slotno);
1286
1287 if (slot->data) {
1288 if (slot->data->setup) {
1289 ret = slot->data->setup(slot->data);
1290 if (ret) {
1291 dev_err(&pdev->dev, "platform setup failed\n");
1292 goto free;
1293 }
1294 }
1295 slot->rst_n_gpio = slot->data->rst_n_gpio;
1296 slot->cd_gpio = slot->data->cd_gpio;
1297 }
1298
1299 host->hw_name = "PCI";
1300 host->ops = &sdhci_pci_ops;
1301 host->quirks = chip->quirks;
1302 host->quirks2 = chip->quirks2;
1303
1304 host->irq = pdev->irq;
1305
1306 ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc));
1307 if (ret) {
1308 dev_err(&pdev->dev, "cannot request region\n");
1309 goto cleanup;
1310 }
1311
1312 host->ioaddr = pci_ioremap_bar(pdev, bar);
1313 if (!host->ioaddr) {
1314 dev_err(&pdev->dev, "failed to remap registers\n");
1315 ret = -ENOMEM;
1316 goto release;
1317 }
1318
1319 if (chip->fixes && chip->fixes->probe_slot) {
1320 ret = chip->fixes->probe_slot(slot);
1321 if (ret)
1322 goto unmap;
1323 }
1324
1325 if (gpio_is_valid(slot->rst_n_gpio)) {
1326 if (!gpio_request(slot->rst_n_gpio, "eMMC_reset")) {
1327 gpio_direction_output(slot->rst_n_gpio, 1);
1328 slot->host->mmc->caps |= MMC_CAP_HW_RESET;
1329 } else {
1330 dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
1331 slot->rst_n_gpio = -EINVAL;
1332 }
1333 }
1334
1335 host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
1336 host->mmc->slotno = slotno;
1337 host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
1338
1339 ret = sdhci_add_host(host);
1340 if (ret)
1341 goto remove;
1342
1343 sdhci_pci_add_own_cd(slot);
1344
1345 return slot;
1346
1347 remove:
1348 if (gpio_is_valid(slot->rst_n_gpio))
1349 gpio_free(slot->rst_n_gpio);
1350
1351 if (chip->fixes && chip->fixes->remove_slot)
1352 chip->fixes->remove_slot(slot, 0);
1353
1354 unmap:
1355 iounmap(host->ioaddr);
1356
1357 release:
1358 pci_release_region(pdev, bar);
1359
1360 cleanup:
1361 if (slot->data && slot->data->cleanup)
1362 slot->data->cleanup(slot->data);
1363
1364 free:
1365 sdhci_free_host(host);
1366
1367 return ERR_PTR(ret);
1368 }
1369
sdhci_pci_remove_slot(struct sdhci_pci_slot * slot)1370 static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
1371 {
1372 int dead;
1373 u32 scratch;
1374
1375 sdhci_pci_remove_own_cd(slot);
1376
1377 dead = 0;
1378 scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
1379 if (scratch == (u32)-1)
1380 dead = 1;
1381
1382 sdhci_remove_host(slot->host, dead);
1383
1384 if (gpio_is_valid(slot->rst_n_gpio))
1385 gpio_free(slot->rst_n_gpio);
1386
1387 if (slot->chip->fixes && slot->chip->fixes->remove_slot)
1388 slot->chip->fixes->remove_slot(slot, dead);
1389
1390 if (slot->data && slot->data->cleanup)
1391 slot->data->cleanup(slot->data);
1392
1393 pci_release_region(slot->chip->pdev, slot->pci_bar);
1394
1395 sdhci_free_host(slot->host);
1396 }
1397
sdhci_pci_runtime_pm_allow(struct device * dev)1398 static void sdhci_pci_runtime_pm_allow(struct device *dev)
1399 {
1400 pm_runtime_put_noidle(dev);
1401 pm_runtime_allow(dev);
1402 pm_runtime_set_autosuspend_delay(dev, 50);
1403 pm_runtime_use_autosuspend(dev);
1404 pm_suspend_ignore_children(dev, 1);
1405 }
1406
sdhci_pci_runtime_pm_forbid(struct device * dev)1407 static void sdhci_pci_runtime_pm_forbid(struct device *dev)
1408 {
1409 pm_runtime_forbid(dev);
1410 pm_runtime_get_noresume(dev);
1411 }
1412
sdhci_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1413 static int sdhci_pci_probe(struct pci_dev *pdev,
1414 const struct pci_device_id *ent)
1415 {
1416 struct sdhci_pci_chip *chip;
1417 struct sdhci_pci_slot *slot;
1418
1419 u8 slots, first_bar;
1420 int ret, i;
1421
1422 BUG_ON(pdev == NULL);
1423 BUG_ON(ent == NULL);
1424
1425 dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
1426 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
1427
1428 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1429 if (ret)
1430 return ret;
1431
1432 slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1433 dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
1434 if (slots == 0)
1435 return -ENODEV;
1436
1437 BUG_ON(slots > MAX_SLOTS);
1438
1439 ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1440 if (ret)
1441 return ret;
1442
1443 first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1444
1445 if (first_bar > 5) {
1446 dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
1447 return -ENODEV;
1448 }
1449
1450 ret = pci_enable_device(pdev);
1451 if (ret)
1452 return ret;
1453
1454 chip = kzalloc(sizeof(struct sdhci_pci_chip), GFP_KERNEL);
1455 if (!chip) {
1456 ret = -ENOMEM;
1457 goto err;
1458 }
1459
1460 chip->pdev = pdev;
1461 chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
1462 if (chip->fixes) {
1463 chip->quirks = chip->fixes->quirks;
1464 chip->quirks2 = chip->fixes->quirks2;
1465 chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
1466 }
1467 chip->num_slots = slots;
1468
1469 pci_set_drvdata(pdev, chip);
1470
1471 if (chip->fixes && chip->fixes->probe) {
1472 ret = chip->fixes->probe(chip);
1473 if (ret)
1474 goto free;
1475 }
1476
1477 slots = chip->num_slots; /* Quirk may have changed this */
1478
1479 for (i = 0; i < slots; i++) {
1480 slot = sdhci_pci_probe_slot(pdev, chip, first_bar, i);
1481 if (IS_ERR(slot)) {
1482 for (i--; i >= 0; i--)
1483 sdhci_pci_remove_slot(chip->slots[i]);
1484 ret = PTR_ERR(slot);
1485 goto free;
1486 }
1487
1488 chip->slots[i] = slot;
1489 }
1490
1491 if (chip->allow_runtime_pm)
1492 sdhci_pci_runtime_pm_allow(&pdev->dev);
1493
1494 return 0;
1495
1496 free:
1497 pci_set_drvdata(pdev, NULL);
1498 kfree(chip);
1499
1500 err:
1501 pci_disable_device(pdev);
1502 return ret;
1503 }
1504
sdhci_pci_remove(struct pci_dev * pdev)1505 static void sdhci_pci_remove(struct pci_dev *pdev)
1506 {
1507 int i;
1508 struct sdhci_pci_chip *chip;
1509
1510 chip = pci_get_drvdata(pdev);
1511
1512 if (chip) {
1513 if (chip->allow_runtime_pm)
1514 sdhci_pci_runtime_pm_forbid(&pdev->dev);
1515
1516 for (i = 0; i < chip->num_slots; i++)
1517 sdhci_pci_remove_slot(chip->slots[i]);
1518
1519 pci_set_drvdata(pdev, NULL);
1520 kfree(chip);
1521 }
1522
1523 pci_disable_device(pdev);
1524 }
1525
1526 static struct pci_driver sdhci_driver = {
1527 .name = "sdhci-pci",
1528 .id_table = pci_ids,
1529 .probe = sdhci_pci_probe,
1530 .remove = sdhci_pci_remove,
1531 .driver = {
1532 .pm = &sdhci_pci_pm_ops
1533 },
1534 };
1535
1536 module_pci_driver(sdhci_driver);
1537
1538 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
1539 MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
1540 MODULE_LICENSE("GPL");
1541