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[linux.git] / drivers / mmc / host / sdhci-pci-core.c
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/bitfield.h>
16 #include <linux/string.h>
17 #include <linux/delay.h>
18 #include <linux/highmem.h>
19 #include <linux/module.h>
20 #include <linux/pci.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/slab.h>
23 #include <linux/device.h>
24 #include <linux/mmc/host.h>
25 #include <linux/mmc/mmc.h>
26 #include <linux/scatterlist.h>
27 #include <linux/io.h>
28 #include <linux/gpio.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/mmc/slot-gpio.h>
31 #include <linux/mmc/sdhci-pci-data.h>
32 #include <linux/acpi.h>
33
34 #ifdef CONFIG_X86
35 #include <asm/iosf_mbi.h>
36 #endif
37
38 #include "cqhci.h"
39
40 #include "sdhci.h"
41 #include "sdhci-pci.h"
42
43 static void sdhci_pci_hw_reset(struct sdhci_host *host);
44
45 #ifdef CONFIG_PM_SLEEP
46 static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip)
47 {
48         mmc_pm_flag_t pm_flags = 0;
49         bool cap_cd_wake = false;
50         int i;
51
52         for (i = 0; i < chip->num_slots; i++) {
53                 struct sdhci_pci_slot *slot = chip->slots[i];
54
55                 if (slot) {
56                         pm_flags |= slot->host->mmc->pm_flags;
57                         if (slot->host->mmc->caps & MMC_CAP_CD_WAKE)
58                                 cap_cd_wake = true;
59                 }
60         }
61
62         if ((pm_flags & MMC_PM_KEEP_POWER) && (pm_flags & MMC_PM_WAKE_SDIO_IRQ))
63                 return device_wakeup_enable(&chip->pdev->dev);
64         else if (!cap_cd_wake)
65                 return device_wakeup_disable(&chip->pdev->dev);
66
67         return 0;
68 }
69
70 static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
71 {
72         int i, ret;
73
74         sdhci_pci_init_wakeup(chip);
75
76         for (i = 0; i < chip->num_slots; i++) {
77                 struct sdhci_pci_slot *slot = chip->slots[i];
78                 struct sdhci_host *host;
79
80                 if (!slot)
81                         continue;
82
83                 host = slot->host;
84
85                 if (chip->pm_retune && host->tuning_mode != SDHCI_TUNING_MODE_3)
86                         mmc_retune_needed(host->mmc);
87
88                 ret = sdhci_suspend_host(host);
89                 if (ret)
90                         goto err_pci_suspend;
91
92                 if (device_may_wakeup(&chip->pdev->dev))
93                         mmc_gpio_set_cd_wake(host->mmc, true);
94         }
95
96         return 0;
97
98 err_pci_suspend:
99         while (--i >= 0)
100                 sdhci_resume_host(chip->slots[i]->host);
101         return ret;
102 }
103
104 int sdhci_pci_resume_host(struct sdhci_pci_chip *chip)
105 {
106         struct sdhci_pci_slot *slot;
107         int i, ret;
108
109         for (i = 0; i < chip->num_slots; i++) {
110                 slot = chip->slots[i];
111                 if (!slot)
112                         continue;
113
114                 ret = sdhci_resume_host(slot->host);
115                 if (ret)
116                         return ret;
117
118                 mmc_gpio_set_cd_wake(slot->host->mmc, false);
119         }
120
121         return 0;
122 }
123
124 static int sdhci_cqhci_suspend(struct sdhci_pci_chip *chip)
125 {
126         int ret;
127
128         ret = cqhci_suspend(chip->slots[0]->host->mmc);
129         if (ret)
130                 return ret;
131
132         return sdhci_pci_suspend_host(chip);
133 }
134
135 static int sdhci_cqhci_resume(struct sdhci_pci_chip *chip)
136 {
137         int ret;
138
139         ret = sdhci_pci_resume_host(chip);
140         if (ret)
141                 return ret;
142
143         return cqhci_resume(chip->slots[0]->host->mmc);
144 }
145 #endif
146
147 #ifdef CONFIG_PM
148 static int sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip *chip)
149 {
150         struct sdhci_pci_slot *slot;
151         struct sdhci_host *host;
152         int i, ret;
153
154         for (i = 0; i < chip->num_slots; i++) {
155                 slot = chip->slots[i];
156                 if (!slot)
157                         continue;
158
159                 host = slot->host;
160
161                 ret = sdhci_runtime_suspend_host(host);
162                 if (ret)
163                         goto err_pci_runtime_suspend;
164
165                 if (chip->rpm_retune &&
166                     host->tuning_mode != SDHCI_TUNING_MODE_3)
167                         mmc_retune_needed(host->mmc);
168         }
169
170         return 0;
171
172 err_pci_runtime_suspend:
173         while (--i >= 0)
174                 sdhci_runtime_resume_host(chip->slots[i]->host);
175         return ret;
176 }
177
178 static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip)
179 {
180         struct sdhci_pci_slot *slot;
181         int i, ret;
182
183         for (i = 0; i < chip->num_slots; i++) {
184                 slot = chip->slots[i];
185                 if (!slot)
186                         continue;
187
188                 ret = sdhci_runtime_resume_host(slot->host);
189                 if (ret)
190                         return ret;
191         }
192
193         return 0;
194 }
195
196 static int sdhci_cqhci_runtime_suspend(struct sdhci_pci_chip *chip)
197 {
198         int ret;
199
200         ret = cqhci_suspend(chip->slots[0]->host->mmc);
201         if (ret)
202                 return ret;
203
204         return sdhci_pci_runtime_suspend_host(chip);
205 }
206
207 static int sdhci_cqhci_runtime_resume(struct sdhci_pci_chip *chip)
208 {
209         int ret;
210
211         ret = sdhci_pci_runtime_resume_host(chip);
212         if (ret)
213                 return ret;
214
215         return cqhci_resume(chip->slots[0]->host->mmc);
216 }
217 #endif
218
219 static u32 sdhci_cqhci_irq(struct sdhci_host *host, u32 intmask)
220 {
221         int cmd_error = 0;
222         int data_error = 0;
223
224         if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
225                 return intmask;
226
227         cqhci_irq(host->mmc, intmask, cmd_error, data_error);
228
229         return 0;
230 }
231
232 static void sdhci_pci_dumpregs(struct mmc_host *mmc)
233 {
234         sdhci_dumpregs(mmc_priv(mmc));
235 }
236
237 /*****************************************************************************\
238  *                                                                           *
239  * Hardware specific quirk handling                                          *
240  *                                                                           *
241 \*****************************************************************************/
242
243 static int ricoh_probe(struct sdhci_pci_chip *chip)
244 {
245         if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
246             chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
247                 chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
248         return 0;
249 }
250
251 static int ricoh_mmc_probe_slot(struct sdhci_pci_slot *slot)
252 {
253         slot->host->caps =
254                 ((0x21 << SDHCI_TIMEOUT_CLK_SHIFT)
255                         & SDHCI_TIMEOUT_CLK_MASK) |
256
257                 ((0x21 << SDHCI_CLOCK_BASE_SHIFT)
258                         & SDHCI_CLOCK_BASE_MASK) |
259
260                 SDHCI_TIMEOUT_CLK_UNIT |
261                 SDHCI_CAN_VDD_330 |
262                 SDHCI_CAN_DO_HISPD |
263                 SDHCI_CAN_DO_SDMA;
264         return 0;
265 }
266
267 #ifdef CONFIG_PM_SLEEP
268 static int ricoh_mmc_resume(struct sdhci_pci_chip *chip)
269 {
270         /* Apply a delay to allow controller to settle */
271         /* Otherwise it becomes confused if card state changed
272                 during suspend */
273         msleep(500);
274         return sdhci_pci_resume_host(chip);
275 }
276 #endif
277
278 static const struct sdhci_pci_fixes sdhci_ricoh = {
279         .probe          = ricoh_probe,
280         .quirks         = SDHCI_QUIRK_32BIT_DMA_ADDR |
281                           SDHCI_QUIRK_FORCE_DMA |
282                           SDHCI_QUIRK_CLOCK_BEFORE_RESET,
283 };
284
285 static const struct sdhci_pci_fixes sdhci_ricoh_mmc = {
286         .probe_slot     = ricoh_mmc_probe_slot,
287 #ifdef CONFIG_PM_SLEEP
288         .resume         = ricoh_mmc_resume,
289 #endif
290         .quirks         = SDHCI_QUIRK_32BIT_DMA_ADDR |
291                           SDHCI_QUIRK_CLOCK_BEFORE_RESET |
292                           SDHCI_QUIRK_NO_CARD_NO_RESET |
293                           SDHCI_QUIRK_MISSING_CAPS
294 };
295
296 static const struct sdhci_pci_fixes sdhci_ene_712 = {
297         .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
298                           SDHCI_QUIRK_BROKEN_DMA,
299 };
300
301 static const struct sdhci_pci_fixes sdhci_ene_714 = {
302         .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
303                           SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
304                           SDHCI_QUIRK_BROKEN_DMA,
305 };
306
307 static const struct sdhci_pci_fixes sdhci_cafe = {
308         .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
309                           SDHCI_QUIRK_NO_BUSY_IRQ |
310                           SDHCI_QUIRK_BROKEN_CARD_DETECTION |
311                           SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
312 };
313
314 static const struct sdhci_pci_fixes sdhci_intel_qrk = {
315         .quirks         = SDHCI_QUIRK_NO_HISPD_BIT,
316 };
317
318 static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
319 {
320         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
321         return 0;
322 }
323
324 /*
325  * ADMA operation is disabled for Moorestown platform due to
326  * hardware bugs.
327  */
328 static int mrst_hc_probe(struct sdhci_pci_chip *chip)
329 {
330         /*
331          * slots number is fixed here for MRST as SDIO3/5 are never used and
332          * have hardware bugs.
333          */
334         chip->num_slots = 1;
335         return 0;
336 }
337
338 static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
339 {
340         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
341         return 0;
342 }
343
344 #ifdef CONFIG_PM
345
346 static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
347 {
348         struct sdhci_pci_slot *slot = dev_id;
349         struct sdhci_host *host = slot->host;
350
351         mmc_detect_change(host->mmc, msecs_to_jiffies(200));
352         return IRQ_HANDLED;
353 }
354
355 static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
356 {
357         int err, irq, gpio = slot->cd_gpio;
358
359         slot->cd_gpio = -EINVAL;
360         slot->cd_irq = -EINVAL;
361
362         if (!gpio_is_valid(gpio))
363                 return;
364
365         err = devm_gpio_request(&slot->chip->pdev->dev, gpio, "sd_cd");
366         if (err < 0)
367                 goto out;
368
369         err = gpio_direction_input(gpio);
370         if (err < 0)
371                 goto out_free;
372
373         irq = gpio_to_irq(gpio);
374         if (irq < 0)
375                 goto out_free;
376
377         err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
378                           IRQF_TRIGGER_FALLING, "sd_cd", slot);
379         if (err)
380                 goto out_free;
381
382         slot->cd_gpio = gpio;
383         slot->cd_irq = irq;
384
385         return;
386
387 out_free:
388         devm_gpio_free(&slot->chip->pdev->dev, gpio);
389 out:
390         dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
391 }
392
393 static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
394 {
395         if (slot->cd_irq >= 0)
396                 free_irq(slot->cd_irq, slot);
397 }
398
399 #else
400
401 static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
402 {
403 }
404
405 static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
406 {
407 }
408
409 #endif
410
411 static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
412 {
413         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
414         slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC;
415         return 0;
416 }
417
418 static int mfd_sdio_probe_slot(struct sdhci_pci_slot *slot)
419 {
420         slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE;
421         return 0;
422 }
423
424 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
425         .quirks         = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
426         .probe_slot     = mrst_hc_probe_slot,
427 };
428
429 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
430         .quirks         = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
431         .probe          = mrst_hc_probe,
432 };
433
434 static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
435         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
436         .allow_runtime_pm = true,
437         .own_cd_for_runtime_pm = true,
438 };
439
440 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
441         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
442         .quirks2        = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
443         .allow_runtime_pm = true,
444         .probe_slot     = mfd_sdio_probe_slot,
445 };
446
447 static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
448         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
449         .allow_runtime_pm = true,
450         .probe_slot     = mfd_emmc_probe_slot,
451 };
452
453 static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
454         .quirks         = SDHCI_QUIRK_BROKEN_ADMA,
455         .probe_slot     = pch_hc_probe_slot,
456 };
457
458 #ifdef CONFIG_X86
459
460 #define BYT_IOSF_SCCEP                  0x63
461 #define BYT_IOSF_OCP_NETCTRL0           0x1078
462 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
463
464 static void byt_ocp_setting(struct pci_dev *pdev)
465 {
466         u32 val = 0;
467
468         if (pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC &&
469             pdev->device != PCI_DEVICE_ID_INTEL_BYT_SDIO &&
470             pdev->device != PCI_DEVICE_ID_INTEL_BYT_SD &&
471             pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC2)
472                 return;
473
474         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
475                           &val)) {
476                 dev_err(&pdev->dev, "%s read error\n", __func__);
477                 return;
478         }
479
480         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
481                 return;
482
483         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
484
485         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
486                            val)) {
487                 dev_err(&pdev->dev, "%s write error\n", __func__);
488                 return;
489         }
490
491         dev_dbg(&pdev->dev, "%s completed\n", __func__);
492 }
493
494 #else
495
496 static inline void byt_ocp_setting(struct pci_dev *pdev)
497 {
498 }
499
500 #endif
501
502 enum {
503         INTEL_DSM_FNS           =  0,
504         INTEL_DSM_V18_SWITCH    =  3,
505         INTEL_DSM_V33_SWITCH    =  4,
506         INTEL_DSM_DRV_STRENGTH  =  9,
507         INTEL_DSM_D3_RETUNE     = 10,
508 };
509
510 struct intel_host {
511         u32     dsm_fns;
512         int     drv_strength;
513         bool    d3_retune;
514         bool    rpm_retune_ok;
515         u32     glk_rx_ctrl1;
516         u32     glk_tun_val;
517 };
518
519 static const guid_t intel_dsm_guid =
520         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
521                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
522
523 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
524                        unsigned int fn, u32 *result)
525 {
526         union acpi_object *obj;
527         int err = 0;
528         size_t len;
529
530         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
531         if (!obj)
532                 return -EOPNOTSUPP;
533
534         if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < 1) {
535                 err = -EINVAL;
536                 goto out;
537         }
538
539         len = min_t(size_t, obj->buffer.length, 4);
540
541         *result = 0;
542         memcpy(result, obj->buffer.pointer, len);
543 out:
544         ACPI_FREE(obj);
545
546         return err;
547 }
548
549 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
550                      unsigned int fn, u32 *result)
551 {
552         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
553                 return -EOPNOTSUPP;
554
555         return __intel_dsm(intel_host, dev, fn, result);
556 }
557
558 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
559                            struct mmc_host *mmc)
560 {
561         int err;
562         u32 val;
563
564         intel_host->d3_retune = true;
565
566         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
567         if (err) {
568                 pr_debug("%s: DSM not supported, error %d\n",
569                          mmc_hostname(mmc), err);
570                 return;
571         }
572
573         pr_debug("%s: DSM function mask %#x\n",
574                  mmc_hostname(mmc), intel_host->dsm_fns);
575
576         err = intel_dsm(intel_host, dev, INTEL_DSM_DRV_STRENGTH, &val);
577         intel_host->drv_strength = err ? 0 : val;
578
579         err = intel_dsm(intel_host, dev, INTEL_DSM_D3_RETUNE, &val);
580         intel_host->d3_retune = err ? true : !!val;
581 }
582
583 static void sdhci_pci_int_hw_reset(struct sdhci_host *host)
584 {
585         u8 reg;
586
587         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
588         reg |= 0x10;
589         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
590         /* For eMMC, minimum is 1us but give it 9us for good measure */
591         udelay(9);
592         reg &= ~0x10;
593         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
594         /* For eMMC, minimum is 200us but give it 300us for good measure */
595         usleep_range(300, 1000);
596 }
597
598 static int intel_select_drive_strength(struct mmc_card *card,
599                                        unsigned int max_dtr, int host_drv,
600                                        int card_drv, int *drv_type)
601 {
602         struct sdhci_host *host = mmc_priv(card->host);
603         struct sdhci_pci_slot *slot = sdhci_priv(host);
604         struct intel_host *intel_host = sdhci_pci_priv(slot);
605
606         return intel_host->drv_strength;
607 }
608
609 static int bxt_get_cd(struct mmc_host *mmc)
610 {
611         int gpio_cd = mmc_gpio_get_cd(mmc);
612         struct sdhci_host *host = mmc_priv(mmc);
613         unsigned long flags;
614         int ret = 0;
615
616         if (!gpio_cd)
617                 return 0;
618
619         spin_lock_irqsave(&host->lock, flags);
620
621         if (host->flags & SDHCI_DEVICE_DEAD)
622                 goto out;
623
624         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
625 out:
626         spin_unlock_irqrestore(&host->lock, flags);
627
628         return ret;
629 }
630
631 #define SDHCI_INTEL_PWR_TIMEOUT_CNT     20
632 #define SDHCI_INTEL_PWR_TIMEOUT_UDELAY  100
633
634 static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode,
635                                   unsigned short vdd)
636 {
637         int cntr;
638         u8 reg;
639
640         sdhci_set_power(host, mode, vdd);
641
642         if (mode == MMC_POWER_OFF)
643                 return;
644
645         /*
646          * Bus power might not enable after D3 -> D0 transition due to the
647          * present state not yet having propagated. Retry for up to 2ms.
648          */
649         for (cntr = 0; cntr < SDHCI_INTEL_PWR_TIMEOUT_CNT; cntr++) {
650                 reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
651                 if (reg & SDHCI_POWER_ON)
652                         break;
653                 udelay(SDHCI_INTEL_PWR_TIMEOUT_UDELAY);
654                 reg |= SDHCI_POWER_ON;
655                 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
656         }
657 }
658
659 #define INTEL_HS400_ES_REG 0x78
660 #define INTEL_HS400_ES_BIT BIT(0)
661
662 static void intel_hs400_enhanced_strobe(struct mmc_host *mmc,
663                                         struct mmc_ios *ios)
664 {
665         struct sdhci_host *host = mmc_priv(mmc);
666         u32 val;
667
668         val = sdhci_readl(host, INTEL_HS400_ES_REG);
669         if (ios->enhanced_strobe)
670                 val |= INTEL_HS400_ES_BIT;
671         else
672                 val &= ~INTEL_HS400_ES_BIT;
673         sdhci_writel(host, val, INTEL_HS400_ES_REG);
674 }
675
676 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
677                                              struct mmc_ios *ios)
678 {
679         struct device *dev = mmc_dev(mmc);
680         struct sdhci_host *host = mmc_priv(mmc);
681         struct sdhci_pci_slot *slot = sdhci_priv(host);
682         struct intel_host *intel_host = sdhci_pci_priv(slot);
683         unsigned int fn;
684         u32 result = 0;
685         int err;
686
687         err = sdhci_start_signal_voltage_switch(mmc, ios);
688         if (err)
689                 return err;
690
691         switch (ios->signal_voltage) {
692         case MMC_SIGNAL_VOLTAGE_330:
693                 fn = INTEL_DSM_V33_SWITCH;
694                 break;
695         case MMC_SIGNAL_VOLTAGE_180:
696                 fn = INTEL_DSM_V18_SWITCH;
697                 break;
698         default:
699                 return 0;
700         }
701
702         err = intel_dsm(intel_host, dev, fn, &result);
703         pr_debug("%s: %s DSM fn %u error %d result %u\n",
704                  mmc_hostname(mmc), __func__, fn, err, result);
705
706         return 0;
707 }
708
709 static const struct sdhci_ops sdhci_intel_byt_ops = {
710         .set_clock              = sdhci_set_clock,
711         .set_power              = sdhci_intel_set_power,
712         .enable_dma             = sdhci_pci_enable_dma,
713         .set_bus_width          = sdhci_set_bus_width,
714         .reset                  = sdhci_reset,
715         .set_uhs_signaling      = sdhci_set_uhs_signaling,
716         .hw_reset               = sdhci_pci_hw_reset,
717 };
718
719 static const struct sdhci_ops sdhci_intel_glk_ops = {
720         .set_clock              = sdhci_set_clock,
721         .set_power              = sdhci_intel_set_power,
722         .enable_dma             = sdhci_pci_enable_dma,
723         .set_bus_width          = sdhci_set_bus_width,
724         .reset                  = sdhci_reset,
725         .set_uhs_signaling      = sdhci_set_uhs_signaling,
726         .hw_reset               = sdhci_pci_hw_reset,
727         .irq                    = sdhci_cqhci_irq,
728 };
729
730 static void byt_read_dsm(struct sdhci_pci_slot *slot)
731 {
732         struct intel_host *intel_host = sdhci_pci_priv(slot);
733         struct device *dev = &slot->chip->pdev->dev;
734         struct mmc_host *mmc = slot->host->mmc;
735
736         intel_dsm_init(intel_host, dev, mmc);
737         slot->chip->rpm_retune = intel_host->d3_retune;
738 }
739
740 static int intel_execute_tuning(struct mmc_host *mmc, u32 opcode)
741 {
742         int err = sdhci_execute_tuning(mmc, opcode);
743         struct sdhci_host *host = mmc_priv(mmc);
744
745         if (err)
746                 return err;
747
748         /*
749          * Tuning can leave the IP in an active state (Buffer Read Enable bit
750          * set) which prevents the entry to low power states (i.e. S0i3). Data
751          * reset will clear it.
752          */
753         sdhci_reset(host, SDHCI_RESET_DATA);
754
755         return 0;
756 }
757
758 static void byt_probe_slot(struct sdhci_pci_slot *slot)
759 {
760         struct mmc_host_ops *ops = &slot->host->mmc_host_ops;
761         struct device *dev = &slot->chip->pdev->dev;
762         struct mmc_host *mmc = slot->host->mmc;
763
764         byt_read_dsm(slot);
765
766         byt_ocp_setting(slot->chip->pdev);
767
768         ops->execute_tuning = intel_execute_tuning;
769         ops->start_signal_voltage_switch = intel_start_signal_voltage_switch;
770
771         device_property_read_u32(dev, "max-frequency", &mmc->f_max);
772 }
773
774 static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
775 {
776         byt_probe_slot(slot);
777         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
778                                  MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
779                                  MMC_CAP_CMD_DURING_TFR |
780                                  MMC_CAP_WAIT_WHILE_BUSY;
781         slot->hw_reset = sdhci_pci_int_hw_reset;
782         if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC)
783                 slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
784         slot->host->mmc_host_ops.select_drive_strength =
785                                                 intel_select_drive_strength;
786         return 0;
787 }
788
789 static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
790 {
791         int ret = byt_emmc_probe_slot(slot);
792
793         slot->host->mmc->caps2 |= MMC_CAP2_CQE;
794
795         if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
796                 slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES,
797                 slot->host->mmc_host_ops.hs400_enhanced_strobe =
798                                                 intel_hs400_enhanced_strobe;
799                 slot->host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
800         }
801
802         return ret;
803 }
804
805 static const struct cqhci_host_ops glk_cqhci_ops = {
806         .enable         = sdhci_cqe_enable,
807         .disable        = sdhci_cqe_disable,
808         .dumpregs       = sdhci_pci_dumpregs,
809 };
810
811 static int glk_emmc_add_host(struct sdhci_pci_slot *slot)
812 {
813         struct device *dev = &slot->chip->pdev->dev;
814         struct sdhci_host *host = slot->host;
815         struct cqhci_host *cq_host;
816         bool dma64;
817         int ret;
818
819         ret = sdhci_setup_host(host);
820         if (ret)
821                 return ret;
822
823         cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
824         if (!cq_host) {
825                 ret = -ENOMEM;
826                 goto cleanup;
827         }
828
829         cq_host->mmio = host->ioaddr + 0x200;
830         cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ;
831         cq_host->ops = &glk_cqhci_ops;
832
833         dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
834         if (dma64)
835                 cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
836
837         ret = cqhci_init(cq_host, host->mmc, dma64);
838         if (ret)
839                 goto cleanup;
840
841         ret = __sdhci_add_host(host);
842         if (ret)
843                 goto cleanup;
844
845         return 0;
846
847 cleanup:
848         sdhci_cleanup_host(host);
849         return ret;
850 }
851
852 #ifdef CONFIG_PM
853 #define GLK_RX_CTRL1    0x834
854 #define GLK_TUN_VAL     0x840
855 #define GLK_PATH_PLL    GENMASK(13, 8)
856 #define GLK_DLY         GENMASK(6, 0)
857 /* Workaround firmware failing to restore the tuning value */
858 static void glk_rpm_retune_wa(struct sdhci_pci_chip *chip, bool susp)
859 {
860         struct sdhci_pci_slot *slot = chip->slots[0];
861         struct intel_host *intel_host = sdhci_pci_priv(slot);
862         struct sdhci_host *host = slot->host;
863         u32 glk_rx_ctrl1;
864         u32 glk_tun_val;
865         u32 dly;
866
867         if (intel_host->rpm_retune_ok || !mmc_can_retune(host->mmc))
868                 return;
869
870         glk_rx_ctrl1 = sdhci_readl(host, GLK_RX_CTRL1);
871         glk_tun_val = sdhci_readl(host, GLK_TUN_VAL);
872
873         if (susp) {
874                 intel_host->glk_rx_ctrl1 = glk_rx_ctrl1;
875                 intel_host->glk_tun_val = glk_tun_val;
876                 return;
877         }
878
879         if (!intel_host->glk_tun_val)
880                 return;
881
882         if (glk_rx_ctrl1 != intel_host->glk_rx_ctrl1) {
883                 intel_host->rpm_retune_ok = true;
884                 return;
885         }
886
887         dly = FIELD_PREP(GLK_DLY, FIELD_GET(GLK_PATH_PLL, glk_rx_ctrl1) +
888                                   (intel_host->glk_tun_val << 1));
889         if (dly == FIELD_GET(GLK_DLY, glk_rx_ctrl1))
890                 return;
891
892         glk_rx_ctrl1 = (glk_rx_ctrl1 & ~GLK_DLY) | dly;
893         sdhci_writel(host, glk_rx_ctrl1, GLK_RX_CTRL1);
894
895         intel_host->rpm_retune_ok = true;
896         chip->rpm_retune = true;
897         mmc_retune_needed(host->mmc);
898         pr_info("%s: Requiring re-tune after rpm resume", mmc_hostname(host->mmc));
899 }
900
901 static void glk_rpm_retune_chk(struct sdhci_pci_chip *chip, bool susp)
902 {
903         if (chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_EMMC &&
904             !chip->rpm_retune)
905                 glk_rpm_retune_wa(chip, susp);
906 }
907
908 static int glk_runtime_suspend(struct sdhci_pci_chip *chip)
909 {
910         glk_rpm_retune_chk(chip, true);
911
912         return sdhci_cqhci_runtime_suspend(chip);
913 }
914
915 static int glk_runtime_resume(struct sdhci_pci_chip *chip)
916 {
917         glk_rpm_retune_chk(chip, false);
918
919         return sdhci_cqhci_runtime_resume(chip);
920 }
921 #endif
922
923 #ifdef CONFIG_ACPI
924 static int ni_set_max_freq(struct sdhci_pci_slot *slot)
925 {
926         acpi_status status;
927         unsigned long long max_freq;
928
929         status = acpi_evaluate_integer(ACPI_HANDLE(&slot->chip->pdev->dev),
930                                        "MXFQ", NULL, &max_freq);
931         if (ACPI_FAILURE(status)) {
932                 dev_err(&slot->chip->pdev->dev,
933                         "MXFQ not found in acpi table\n");
934                 return -EINVAL;
935         }
936
937         slot->host->mmc->f_max = max_freq * 1000000;
938
939         return 0;
940 }
941 #else
942 static inline int ni_set_max_freq(struct sdhci_pci_slot *slot)
943 {
944         return 0;
945 }
946 #endif
947
948 static int ni_byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
949 {
950         int err;
951
952         byt_probe_slot(slot);
953
954         err = ni_set_max_freq(slot);
955         if (err)
956                 return err;
957
958         slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
959                                  MMC_CAP_WAIT_WHILE_BUSY;
960         return 0;
961 }
962
963 static int byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
964 {
965         byt_probe_slot(slot);
966         slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
967                                  MMC_CAP_WAIT_WHILE_BUSY;
968         return 0;
969 }
970
971 static int byt_sd_probe_slot(struct sdhci_pci_slot *slot)
972 {
973         byt_probe_slot(slot);
974         slot->host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY |
975                                  MMC_CAP_AGGRESSIVE_PM | MMC_CAP_CD_WAKE;
976         slot->cd_idx = 0;
977         slot->cd_override_level = true;
978         if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXT_SD ||
979             slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXTM_SD ||
980             slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_APL_SD ||
981             slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_SD)
982                 slot->host->mmc_host_ops.get_cd = bxt_get_cd;
983
984         if (slot->chip->pdev->subsystem_vendor == PCI_VENDOR_ID_NI &&
985             slot->chip->pdev->subsystem_device == PCI_SUBDEVICE_ID_NI_78E3)
986                 slot->host->mmc->caps2 |= MMC_CAP2_AVOID_3_3V;
987
988         return 0;
989 }
990
991 #ifdef CONFIG_PM_SLEEP
992
993 static int byt_resume(struct sdhci_pci_chip *chip)
994 {
995         byt_ocp_setting(chip->pdev);
996
997         return sdhci_pci_resume_host(chip);
998 }
999
1000 #endif
1001
1002 #ifdef CONFIG_PM
1003
1004 static int byt_runtime_resume(struct sdhci_pci_chip *chip)
1005 {
1006         byt_ocp_setting(chip->pdev);
1007
1008         return sdhci_pci_runtime_resume_host(chip);
1009 }
1010
1011 #endif
1012
1013 static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
1014 #ifdef CONFIG_PM_SLEEP
1015         .resume         = byt_resume,
1016 #endif
1017 #ifdef CONFIG_PM
1018         .runtime_resume = byt_runtime_resume,
1019 #endif
1020         .allow_runtime_pm = true,
1021         .probe_slot     = byt_emmc_probe_slot,
1022         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1023                           SDHCI_QUIRK_NO_LED,
1024         .quirks2        = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1025                           SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1026                           SDHCI_QUIRK2_STOP_WITH_TC,
1027         .ops            = &sdhci_intel_byt_ops,
1028         .priv_size      = sizeof(struct intel_host),
1029 };
1030
1031 static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = {
1032         .allow_runtime_pm       = true,
1033         .probe_slot             = glk_emmc_probe_slot,
1034         .add_host               = glk_emmc_add_host,
1035 #ifdef CONFIG_PM_SLEEP
1036         .suspend                = sdhci_cqhci_suspend,
1037         .resume                 = sdhci_cqhci_resume,
1038 #endif
1039 #ifdef CONFIG_PM
1040         .runtime_suspend        = glk_runtime_suspend,
1041         .runtime_resume         = glk_runtime_resume,
1042 #endif
1043         .quirks                 = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1044                                   SDHCI_QUIRK_NO_LED,
1045         .quirks2                = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1046                                   SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1047                                   SDHCI_QUIRK2_STOP_WITH_TC,
1048         .ops                    = &sdhci_intel_glk_ops,
1049         .priv_size              = sizeof(struct intel_host),
1050 };
1051
1052 static const struct sdhci_pci_fixes sdhci_ni_byt_sdio = {
1053 #ifdef CONFIG_PM_SLEEP
1054         .resume         = byt_resume,
1055 #endif
1056 #ifdef CONFIG_PM
1057         .runtime_resume = byt_runtime_resume,
1058 #endif
1059         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1060                           SDHCI_QUIRK_NO_LED,
1061         .quirks2        = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1062                           SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1063         .allow_runtime_pm = true,
1064         .probe_slot     = ni_byt_sdio_probe_slot,
1065         .ops            = &sdhci_intel_byt_ops,
1066         .priv_size      = sizeof(struct intel_host),
1067 };
1068
1069 static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
1070 #ifdef CONFIG_PM_SLEEP
1071         .resume         = byt_resume,
1072 #endif
1073 #ifdef CONFIG_PM
1074         .runtime_resume = byt_runtime_resume,
1075 #endif
1076         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1077                           SDHCI_QUIRK_NO_LED,
1078         .quirks2        = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1079                         SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1080         .allow_runtime_pm = true,
1081         .probe_slot     = byt_sdio_probe_slot,
1082         .ops            = &sdhci_intel_byt_ops,
1083         .priv_size      = sizeof(struct intel_host),
1084 };
1085
1086 static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
1087 #ifdef CONFIG_PM_SLEEP
1088         .resume         = byt_resume,
1089 #endif
1090 #ifdef CONFIG_PM
1091         .runtime_resume = byt_runtime_resume,
1092 #endif
1093         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1094                           SDHCI_QUIRK_NO_LED,
1095         .quirks2        = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
1096                           SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1097                           SDHCI_QUIRK2_STOP_WITH_TC,
1098         .allow_runtime_pm = true,
1099         .own_cd_for_runtime_pm = true,
1100         .probe_slot     = byt_sd_probe_slot,
1101         .ops            = &sdhci_intel_byt_ops,
1102         .priv_size      = sizeof(struct intel_host),
1103 };
1104
1105 /* Define Host controllers for Intel Merrifield platform */
1106 #define INTEL_MRFLD_EMMC_0      0
1107 #define INTEL_MRFLD_EMMC_1      1
1108 #define INTEL_MRFLD_SD          2
1109 #define INTEL_MRFLD_SDIO        3
1110
1111 #ifdef CONFIG_ACPI
1112 static void intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot *slot)
1113 {
1114         struct acpi_device *device, *child;
1115
1116         device = ACPI_COMPANION(&slot->chip->pdev->dev);
1117         if (!device)
1118                 return;
1119
1120         acpi_device_fix_up_power(device);
1121         list_for_each_entry(child, &device->children, node)
1122                 if (child->status.present && child->status.enabled)
1123                         acpi_device_fix_up_power(child);
1124 }
1125 #else
1126 static inline void intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot *slot) {}
1127 #endif
1128
1129 static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
1130 {
1131         unsigned int func = PCI_FUNC(slot->chip->pdev->devfn);
1132
1133         switch (func) {
1134         case INTEL_MRFLD_EMMC_0:
1135         case INTEL_MRFLD_EMMC_1:
1136                 slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
1137                                          MMC_CAP_8_BIT_DATA |
1138                                          MMC_CAP_1_8V_DDR;
1139                 break;
1140         case INTEL_MRFLD_SD:
1141                 slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1142                 break;
1143         case INTEL_MRFLD_SDIO:
1144                 /* Advertise 2.0v for compatibility with the SDIO card's OCR */
1145                 slot->host->ocr_mask = MMC_VDD_20_21 | MMC_VDD_165_195;
1146                 slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
1147                                          MMC_CAP_POWER_OFF_CARD;
1148                 break;
1149         default:
1150                 return -ENODEV;
1151         }
1152
1153         intel_mrfld_mmc_fix_up_power_slot(slot);
1154         return 0;
1155 }
1156
1157 static const struct sdhci_pci_fixes sdhci_intel_mrfld_mmc = {
1158         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
1159         .quirks2        = SDHCI_QUIRK2_BROKEN_HS200 |
1160                         SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1161         .allow_runtime_pm = true,
1162         .probe_slot     = intel_mrfld_mmc_probe_slot,
1163 };
1164
1165 static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
1166 {
1167         u8 scratch;
1168         int ret;
1169
1170         ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
1171         if (ret)
1172                 return ret;
1173
1174         /*
1175          * Turn PMOS on [bit 0], set over current detection to 2.4 V
1176          * [bit 1:2] and enable over current debouncing [bit 6].
1177          */
1178         if (on)
1179                 scratch |= 0x47;
1180         else
1181                 scratch &= ~0x47;
1182
1183         return pci_write_config_byte(chip->pdev, 0xAE, scratch);
1184 }
1185
1186 static int jmicron_probe(struct sdhci_pci_chip *chip)
1187 {
1188         int ret;
1189         u16 mmcdev = 0;
1190
1191         if (chip->pdev->revision == 0) {
1192                 chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
1193                           SDHCI_QUIRK_32BIT_DMA_SIZE |
1194                           SDHCI_QUIRK_32BIT_ADMA_SIZE |
1195                           SDHCI_QUIRK_RESET_AFTER_REQUEST |
1196                           SDHCI_QUIRK_BROKEN_SMALL_PIO;
1197         }
1198
1199         /*
1200          * JMicron chips can have two interfaces to the same hardware
1201          * in order to work around limitations in Microsoft's driver.
1202          * We need to make sure we only bind to one of them.
1203          *
1204          * This code assumes two things:
1205          *
1206          * 1. The PCI code adds subfunctions in order.
1207          *
1208          * 2. The MMC interface has a lower subfunction number
1209          *    than the SD interface.
1210          */
1211         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD)
1212                 mmcdev = PCI_DEVICE_ID_JMICRON_JMB38X_MMC;
1213         else if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD)
1214                 mmcdev = PCI_DEVICE_ID_JMICRON_JMB388_ESD;
1215
1216         if (mmcdev) {
1217                 struct pci_dev *sd_dev;
1218
1219                 sd_dev = NULL;
1220                 while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
1221                                                 mmcdev, sd_dev)) != NULL) {
1222                         if ((PCI_SLOT(chip->pdev->devfn) ==
1223                                 PCI_SLOT(sd_dev->devfn)) &&
1224                                 (chip->pdev->bus == sd_dev->bus))
1225                                 break;
1226                 }
1227
1228                 if (sd_dev) {
1229                         pci_dev_put(sd_dev);
1230                         dev_info(&chip->pdev->dev, "Refusing to bind to "
1231                                 "secondary interface.\n");
1232                         return -ENODEV;
1233                 }
1234         }
1235
1236         /*
1237          * JMicron chips need a bit of a nudge to enable the power
1238          * output pins.
1239          */
1240         ret = jmicron_pmos(chip, 1);
1241         if (ret) {
1242                 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
1243                 return ret;
1244         }
1245
1246         /* quirk for unsable RO-detection on JM388 chips */
1247         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD ||
1248             chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1249                 chip->quirks |= SDHCI_QUIRK_UNSTABLE_RO_DETECT;
1250
1251         return 0;
1252 }
1253
1254 static void jmicron_enable_mmc(struct sdhci_host *host, int on)
1255 {
1256         u8 scratch;
1257
1258         scratch = readb(host->ioaddr + 0xC0);
1259
1260         if (on)
1261                 scratch |= 0x01;
1262         else
1263                 scratch &= ~0x01;
1264
1265         writeb(scratch, host->ioaddr + 0xC0);
1266 }
1267
1268 static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
1269 {
1270         if (slot->chip->pdev->revision == 0) {
1271                 u16 version;
1272
1273                 version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
1274                 version = (version & SDHCI_VENDOR_VER_MASK) >>
1275                         SDHCI_VENDOR_VER_SHIFT;
1276
1277                 /*
1278                  * Older versions of the chip have lots of nasty glitches
1279                  * in the ADMA engine. It's best just to avoid it
1280                  * completely.
1281                  */
1282                 if (version < 0xAC)
1283                         slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1284         }
1285
1286         /* JM388 MMC doesn't support 1.8V while SD supports it */
1287         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1288                 slot->host->ocr_avail_sd = MMC_VDD_32_33 | MMC_VDD_33_34 |
1289                         MMC_VDD_29_30 | MMC_VDD_30_31 |
1290                         MMC_VDD_165_195; /* allow 1.8V */
1291                 slot->host->ocr_avail_mmc = MMC_VDD_32_33 | MMC_VDD_33_34 |
1292                         MMC_VDD_29_30 | MMC_VDD_30_31; /* no 1.8V for MMC */
1293         }
1294
1295         /*
1296          * The secondary interface requires a bit set to get the
1297          * interrupts.
1298          */
1299         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1300             slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1301                 jmicron_enable_mmc(slot->host, 1);
1302
1303         slot->host->mmc->caps |= MMC_CAP_BUS_WIDTH_TEST;
1304
1305         return 0;
1306 }
1307
1308 static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
1309 {
1310         if (dead)
1311                 return;
1312
1313         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1314             slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1315                 jmicron_enable_mmc(slot->host, 0);
1316 }
1317
1318 #ifdef CONFIG_PM_SLEEP
1319 static int jmicron_suspend(struct sdhci_pci_chip *chip)
1320 {
1321         int i, ret;
1322
1323         ret = sdhci_pci_suspend_host(chip);
1324         if (ret)
1325                 return ret;
1326
1327         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1328             chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1329                 for (i = 0; i < chip->num_slots; i++)
1330                         jmicron_enable_mmc(chip->slots[i]->host, 0);
1331         }
1332
1333         return 0;
1334 }
1335
1336 static int jmicron_resume(struct sdhci_pci_chip *chip)
1337 {
1338         int ret, i;
1339
1340         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1341             chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1342                 for (i = 0; i < chip->num_slots; i++)
1343                         jmicron_enable_mmc(chip->slots[i]->host, 1);
1344         }
1345
1346         ret = jmicron_pmos(chip, 1);
1347         if (ret) {
1348                 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
1349                 return ret;
1350         }
1351
1352         return sdhci_pci_resume_host(chip);
1353 }
1354 #endif
1355
1356 static const struct sdhci_pci_fixes sdhci_jmicron = {
1357         .probe          = jmicron_probe,
1358
1359         .probe_slot     = jmicron_probe_slot,
1360         .remove_slot    = jmicron_remove_slot,
1361
1362 #ifdef CONFIG_PM_SLEEP
1363         .suspend        = jmicron_suspend,
1364         .resume         = jmicron_resume,
1365 #endif
1366 };
1367
1368 /* SysKonnect CardBus2SDIO extra registers */
1369 #define SYSKT_CTRL              0x200
1370 #define SYSKT_RDFIFO_STAT       0x204
1371 #define SYSKT_WRFIFO_STAT       0x208
1372 #define SYSKT_POWER_DATA        0x20c
1373 #define   SYSKT_POWER_330       0xef
1374 #define   SYSKT_POWER_300       0xf8
1375 #define   SYSKT_POWER_184       0xcc
1376 #define SYSKT_POWER_CMD         0x20d
1377 #define   SYSKT_POWER_START     (1 << 7)
1378 #define SYSKT_POWER_STATUS      0x20e
1379 #define   SYSKT_POWER_STATUS_OK (1 << 0)
1380 #define SYSKT_BOARD_REV         0x210
1381 #define SYSKT_CHIP_REV          0x211
1382 #define SYSKT_CONF_DATA         0x212
1383 #define   SYSKT_CONF_DATA_1V8   (1 << 2)
1384 #define   SYSKT_CONF_DATA_2V5   (1 << 1)
1385 #define   SYSKT_CONF_DATA_3V3   (1 << 0)
1386
1387 static int syskt_probe(struct sdhci_pci_chip *chip)
1388 {
1389         if ((chip->pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1390                 chip->pdev->class &= ~0x0000FF;
1391                 chip->pdev->class |= PCI_SDHCI_IFDMA;
1392         }
1393         return 0;
1394 }
1395
1396 static int syskt_probe_slot(struct sdhci_pci_slot *slot)
1397 {
1398         int tm, ps;
1399
1400         u8 board_rev = readb(slot->host->ioaddr + SYSKT_BOARD_REV);
1401         u8  chip_rev = readb(slot->host->ioaddr + SYSKT_CHIP_REV);
1402         dev_info(&slot->chip->pdev->dev, "SysKonnect CardBus2SDIO, "
1403                                          "board rev %d.%d, chip rev %d.%d\n",
1404                                          board_rev >> 4, board_rev & 0xf,
1405                                          chip_rev >> 4,  chip_rev & 0xf);
1406         if (chip_rev >= 0x20)
1407                 slot->host->quirks |= SDHCI_QUIRK_FORCE_DMA;
1408
1409         writeb(SYSKT_POWER_330, slot->host->ioaddr + SYSKT_POWER_DATA);
1410         writeb(SYSKT_POWER_START, slot->host->ioaddr + SYSKT_POWER_CMD);
1411         udelay(50);
1412         tm = 10;  /* Wait max 1 ms */
1413         do {
1414                 ps = readw(slot->host->ioaddr + SYSKT_POWER_STATUS);
1415                 if (ps & SYSKT_POWER_STATUS_OK)
1416                         break;
1417                 udelay(100);
1418         } while (--tm);
1419         if (!tm) {
1420                 dev_err(&slot->chip->pdev->dev,
1421                         "power regulator never stabilized");
1422                 writeb(0, slot->host->ioaddr + SYSKT_POWER_CMD);
1423                 return -ENODEV;
1424         }
1425
1426         return 0;
1427 }
1428
1429 static const struct sdhci_pci_fixes sdhci_syskt = {
1430         .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER,
1431         .probe          = syskt_probe,
1432         .probe_slot     = syskt_probe_slot,
1433 };
1434
1435 static int via_probe(struct sdhci_pci_chip *chip)
1436 {
1437         if (chip->pdev->revision == 0x10)
1438                 chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
1439
1440         return 0;
1441 }
1442
1443 static const struct sdhci_pci_fixes sdhci_via = {
1444         .probe          = via_probe,
1445 };
1446
1447 static int rtsx_probe_slot(struct sdhci_pci_slot *slot)
1448 {
1449         slot->host->mmc->caps2 |= MMC_CAP2_HS200;
1450         return 0;
1451 }
1452
1453 static const struct sdhci_pci_fixes sdhci_rtsx = {
1454         .quirks2        = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1455                         SDHCI_QUIRK2_BROKEN_64_BIT_DMA |
1456                         SDHCI_QUIRK2_BROKEN_DDR50,
1457         .probe_slot     = rtsx_probe_slot,
1458 };
1459
1460 /*AMD chipset generation*/
1461 enum amd_chipset_gen {
1462         AMD_CHIPSET_BEFORE_ML,
1463         AMD_CHIPSET_CZ,
1464         AMD_CHIPSET_NL,
1465         AMD_CHIPSET_UNKNOWN,
1466 };
1467
1468 /* AMD registers */
1469 #define AMD_SD_AUTO_PATTERN             0xB8
1470 #define AMD_MSLEEP_DURATION             4
1471 #define AMD_SD_MISC_CONTROL             0xD0
1472 #define AMD_MAX_TUNE_VALUE              0x0B
1473 #define AMD_AUTO_TUNE_SEL               0x10800
1474 #define AMD_FIFO_PTR                    0x30
1475 #define AMD_BIT_MASK                    0x1F
1476
1477 static void amd_tuning_reset(struct sdhci_host *host)
1478 {
1479         unsigned int val;
1480
1481         val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1482         val |= SDHCI_CTRL_PRESET_VAL_ENABLE | SDHCI_CTRL_EXEC_TUNING;
1483         sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
1484
1485         val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1486         val &= ~SDHCI_CTRL_EXEC_TUNING;
1487         sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
1488 }
1489
1490 static void amd_config_tuning_phase(struct pci_dev *pdev, u8 phase)
1491 {
1492         unsigned int val;
1493
1494         pci_read_config_dword(pdev, AMD_SD_AUTO_PATTERN, &val);
1495         val &= ~AMD_BIT_MASK;
1496         val |= (AMD_AUTO_TUNE_SEL | (phase << 1));
1497         pci_write_config_dword(pdev, AMD_SD_AUTO_PATTERN, val);
1498 }
1499
1500 static void amd_enable_manual_tuning(struct pci_dev *pdev)
1501 {
1502         unsigned int val;
1503
1504         pci_read_config_dword(pdev, AMD_SD_MISC_CONTROL, &val);
1505         val |= AMD_FIFO_PTR;
1506         pci_write_config_dword(pdev, AMD_SD_MISC_CONTROL, val);
1507 }
1508
1509 static int amd_execute_tuning_hs200(struct sdhci_host *host, u32 opcode)
1510 {
1511         struct sdhci_pci_slot *slot = sdhci_priv(host);
1512         struct pci_dev *pdev = slot->chip->pdev;
1513         u8 valid_win = 0;
1514         u8 valid_win_max = 0;
1515         u8 valid_win_end = 0;
1516         u8 ctrl, tune_around;
1517
1518         amd_tuning_reset(host);
1519
1520         for (tune_around = 0; tune_around < 12; tune_around++) {
1521                 amd_config_tuning_phase(pdev, tune_around);
1522
1523                 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
1524                         valid_win = 0;
1525                         msleep(AMD_MSLEEP_DURATION);
1526                         ctrl = SDHCI_RESET_CMD | SDHCI_RESET_DATA;
1527                         sdhci_writeb(host, ctrl, SDHCI_SOFTWARE_RESET);
1528                 } else if (++valid_win > valid_win_max) {
1529                         valid_win_max = valid_win;
1530                         valid_win_end = tune_around;
1531                 }
1532         }
1533
1534         if (!valid_win_max) {
1535                 dev_err(&pdev->dev, "no tuning point found\n");
1536                 return -EIO;
1537         }
1538
1539         amd_config_tuning_phase(pdev, valid_win_end - valid_win_max / 2);
1540
1541         amd_enable_manual_tuning(pdev);
1542
1543         host->mmc->retune_period = 0;
1544
1545         return 0;
1546 }
1547
1548 static int amd_execute_tuning(struct mmc_host *mmc, u32 opcode)
1549 {
1550         struct sdhci_host *host = mmc_priv(mmc);
1551
1552         /* AMD requires custom HS200 tuning */
1553         if (host->timing == MMC_TIMING_MMC_HS200)
1554                 return amd_execute_tuning_hs200(host, opcode);
1555
1556         /* Otherwise perform standard SDHCI tuning */
1557         return sdhci_execute_tuning(mmc, opcode);
1558 }
1559
1560 static int amd_probe_slot(struct sdhci_pci_slot *slot)
1561 {
1562         struct mmc_host_ops *ops = &slot->host->mmc_host_ops;
1563
1564         ops->execute_tuning = amd_execute_tuning;
1565
1566         return 0;
1567 }
1568
1569 static int amd_probe(struct sdhci_pci_chip *chip)
1570 {
1571         struct pci_dev  *smbus_dev;
1572         enum amd_chipset_gen gen;
1573
1574         smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
1575                         PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
1576         if (smbus_dev) {
1577                 gen = AMD_CHIPSET_BEFORE_ML;
1578         } else {
1579                 smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
1580                                 PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
1581                 if (smbus_dev) {
1582                         if (smbus_dev->revision < 0x51)
1583                                 gen = AMD_CHIPSET_CZ;
1584                         else
1585                                 gen = AMD_CHIPSET_NL;
1586                 } else {
1587                         gen = AMD_CHIPSET_UNKNOWN;
1588                 }
1589         }
1590
1591         if (gen == AMD_CHIPSET_BEFORE_ML || gen == AMD_CHIPSET_CZ)
1592                 chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
1593
1594         return 0;
1595 }
1596
1597 static const struct sdhci_ops amd_sdhci_pci_ops = {
1598         .set_clock                      = sdhci_set_clock,
1599         .enable_dma                     = sdhci_pci_enable_dma,
1600         .set_bus_width                  = sdhci_set_bus_width,
1601         .reset                          = sdhci_reset,
1602         .set_uhs_signaling              = sdhci_set_uhs_signaling,
1603 };
1604
1605 static const struct sdhci_pci_fixes sdhci_amd = {
1606         .probe          = amd_probe,
1607         .ops            = &amd_sdhci_pci_ops,
1608         .probe_slot     = amd_probe_slot,
1609 };
1610
1611 static const struct pci_device_id pci_ids[] = {
1612         SDHCI_PCI_DEVICE(RICOH, R5C822,  ricoh),
1613         SDHCI_PCI_DEVICE(RICOH, R5C843,  ricoh_mmc),
1614         SDHCI_PCI_DEVICE(RICOH, R5CE822, ricoh_mmc),
1615         SDHCI_PCI_DEVICE(RICOH, R5CE823, ricoh_mmc),
1616         SDHCI_PCI_DEVICE(ENE, CB712_SD,   ene_712),
1617         SDHCI_PCI_DEVICE(ENE, CB712_SD_2, ene_712),
1618         SDHCI_PCI_DEVICE(ENE, CB714_SD,   ene_714),
1619         SDHCI_PCI_DEVICE(ENE, CB714_SD_2, ene_714),
1620         SDHCI_PCI_DEVICE(MARVELL, 88ALP01_SD, cafe),
1621         SDHCI_PCI_DEVICE(JMICRON, JMB38X_SD,  jmicron),
1622         SDHCI_PCI_DEVICE(JMICRON, JMB38X_MMC, jmicron),
1623         SDHCI_PCI_DEVICE(JMICRON, JMB388_SD,  jmicron),
1624         SDHCI_PCI_DEVICE(JMICRON, JMB388_ESD, jmicron),
1625         SDHCI_PCI_DEVICE(SYSKONNECT, 8000, syskt),
1626         SDHCI_PCI_DEVICE(VIA, 95D0, via),
1627         SDHCI_PCI_DEVICE(REALTEK, 5250, rtsx),
1628         SDHCI_PCI_DEVICE(INTEL, QRK_SD,    intel_qrk),
1629         SDHCI_PCI_DEVICE(INTEL, MRST_SD0,  intel_mrst_hc0),
1630         SDHCI_PCI_DEVICE(INTEL, MRST_SD1,  intel_mrst_hc1_hc2),
1631         SDHCI_PCI_DEVICE(INTEL, MRST_SD2,  intel_mrst_hc1_hc2),
1632         SDHCI_PCI_DEVICE(INTEL, MFD_SD,    intel_mfd_sd),
1633         SDHCI_PCI_DEVICE(INTEL, MFD_SDIO1, intel_mfd_sdio),
1634         SDHCI_PCI_DEVICE(INTEL, MFD_SDIO2, intel_mfd_sdio),
1635         SDHCI_PCI_DEVICE(INTEL, MFD_EMMC0, intel_mfd_emmc),
1636         SDHCI_PCI_DEVICE(INTEL, MFD_EMMC1, intel_mfd_emmc),
1637         SDHCI_PCI_DEVICE(INTEL, PCH_SDIO0, intel_pch_sdio),
1638         SDHCI_PCI_DEVICE(INTEL, PCH_SDIO1, intel_pch_sdio),
1639         SDHCI_PCI_DEVICE(INTEL, BYT_EMMC,  intel_byt_emmc),
1640         SDHCI_PCI_SUBDEVICE(INTEL, BYT_SDIO, NI, 7884, ni_byt_sdio),
1641         SDHCI_PCI_DEVICE(INTEL, BYT_SDIO,  intel_byt_sdio),
1642         SDHCI_PCI_DEVICE(INTEL, BYT_SD,    intel_byt_sd),
1643         SDHCI_PCI_DEVICE(INTEL, BYT_EMMC2, intel_byt_emmc),
1644         SDHCI_PCI_DEVICE(INTEL, BSW_EMMC,  intel_byt_emmc),
1645         SDHCI_PCI_DEVICE(INTEL, BSW_SDIO,  intel_byt_sdio),
1646         SDHCI_PCI_DEVICE(INTEL, BSW_SD,    intel_byt_sd),
1647         SDHCI_PCI_DEVICE(INTEL, CLV_SDIO0, intel_mfd_sd),
1648         SDHCI_PCI_DEVICE(INTEL, CLV_SDIO1, intel_mfd_sdio),
1649         SDHCI_PCI_DEVICE(INTEL, CLV_SDIO2, intel_mfd_sdio),
1650         SDHCI_PCI_DEVICE(INTEL, CLV_EMMC0, intel_mfd_emmc),
1651         SDHCI_PCI_DEVICE(INTEL, CLV_EMMC1, intel_mfd_emmc),
1652         SDHCI_PCI_DEVICE(INTEL, MRFLD_MMC, intel_mrfld_mmc),
1653         SDHCI_PCI_DEVICE(INTEL, SPT_EMMC,  intel_byt_emmc),
1654         SDHCI_PCI_DEVICE(INTEL, SPT_SDIO,  intel_byt_sdio),
1655         SDHCI_PCI_DEVICE(INTEL, SPT_SD,    intel_byt_sd),
1656         SDHCI_PCI_DEVICE(INTEL, DNV_EMMC,  intel_byt_emmc),
1657         SDHCI_PCI_DEVICE(INTEL, CDF_EMMC,  intel_glk_emmc),
1658         SDHCI_PCI_DEVICE(INTEL, BXT_EMMC,  intel_byt_emmc),
1659         SDHCI_PCI_DEVICE(INTEL, BXT_SDIO,  intel_byt_sdio),
1660         SDHCI_PCI_DEVICE(INTEL, BXT_SD,    intel_byt_sd),
1661         SDHCI_PCI_DEVICE(INTEL, BXTM_EMMC, intel_byt_emmc),
1662         SDHCI_PCI_DEVICE(INTEL, BXTM_SDIO, intel_byt_sdio),
1663         SDHCI_PCI_DEVICE(INTEL, BXTM_SD,   intel_byt_sd),
1664         SDHCI_PCI_DEVICE(INTEL, APL_EMMC,  intel_byt_emmc),
1665         SDHCI_PCI_DEVICE(INTEL, APL_SDIO,  intel_byt_sdio),
1666         SDHCI_PCI_DEVICE(INTEL, APL_SD,    intel_byt_sd),
1667         SDHCI_PCI_DEVICE(INTEL, GLK_EMMC,  intel_glk_emmc),
1668         SDHCI_PCI_DEVICE(INTEL, GLK_SDIO,  intel_byt_sdio),
1669         SDHCI_PCI_DEVICE(INTEL, GLK_SD,    intel_byt_sd),
1670         SDHCI_PCI_DEVICE(INTEL, CNP_EMMC,  intel_glk_emmc),
1671         SDHCI_PCI_DEVICE(INTEL, CNP_SD,    intel_byt_sd),
1672         SDHCI_PCI_DEVICE(INTEL, CNPH_SD,   intel_byt_sd),
1673         SDHCI_PCI_DEVICE(INTEL, ICP_EMMC,  intel_glk_emmc),
1674         SDHCI_PCI_DEVICE(INTEL, ICP_SD,    intel_byt_sd),
1675         SDHCI_PCI_DEVICE(INTEL, CML_EMMC,  intel_glk_emmc),
1676         SDHCI_PCI_DEVICE(INTEL, CML_SD,    intel_byt_sd),
1677         SDHCI_PCI_DEVICE(O2, 8120,     o2),
1678         SDHCI_PCI_DEVICE(O2, 8220,     o2),
1679         SDHCI_PCI_DEVICE(O2, 8221,     o2),
1680         SDHCI_PCI_DEVICE(O2, 8320,     o2),
1681         SDHCI_PCI_DEVICE(O2, 8321,     o2),
1682         SDHCI_PCI_DEVICE(O2, FUJIN2,   o2),
1683         SDHCI_PCI_DEVICE(O2, SDS0,     o2),
1684         SDHCI_PCI_DEVICE(O2, SDS1,     o2),
1685         SDHCI_PCI_DEVICE(O2, SEABIRD0, o2),
1686         SDHCI_PCI_DEVICE(O2, SEABIRD1, o2),
1687         SDHCI_PCI_DEVICE(ARASAN, PHY_EMMC, arasan),
1688         SDHCI_PCI_DEVICE(SYNOPSYS, DWC_MSHC, snps),
1689         SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd),
1690         /* Generic SD host controller */
1691         {PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)},
1692         { /* end: all zeroes */ },
1693 };
1694
1695 MODULE_DEVICE_TABLE(pci, pci_ids);
1696
1697 /*****************************************************************************\
1698  *                                                                           *
1699  * SDHCI core callbacks                                                      *
1700  *                                                                           *
1701 \*****************************************************************************/
1702
1703 int sdhci_pci_enable_dma(struct sdhci_host *host)
1704 {
1705         struct sdhci_pci_slot *slot;
1706         struct pci_dev *pdev;
1707
1708         slot = sdhci_priv(host);
1709         pdev = slot->chip->pdev;
1710
1711         if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
1712                 ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
1713                 (host->flags & SDHCI_USE_SDMA)) {
1714                 dev_warn(&pdev->dev, "Will use DMA mode even though HW "
1715                         "doesn't fully claim to support it.\n");
1716         }
1717
1718         pci_set_master(pdev);
1719
1720         return 0;
1721 }
1722
1723 static void sdhci_pci_gpio_hw_reset(struct sdhci_host *host)
1724 {
1725         struct sdhci_pci_slot *slot = sdhci_priv(host);
1726         int rst_n_gpio = slot->rst_n_gpio;
1727
1728         if (!gpio_is_valid(rst_n_gpio))
1729                 return;
1730         gpio_set_value_cansleep(rst_n_gpio, 0);
1731         /* For eMMC, minimum is 1us but give it 10us for good measure */
1732         udelay(10);
1733         gpio_set_value_cansleep(rst_n_gpio, 1);
1734         /* For eMMC, minimum is 200us but give it 300us for good measure */
1735         usleep_range(300, 1000);
1736 }
1737
1738 static void sdhci_pci_hw_reset(struct sdhci_host *host)
1739 {
1740         struct sdhci_pci_slot *slot = sdhci_priv(host);
1741
1742         if (slot->hw_reset)
1743                 slot->hw_reset(host);
1744 }
1745
1746 static const struct sdhci_ops sdhci_pci_ops = {
1747         .set_clock      = sdhci_set_clock,
1748         .enable_dma     = sdhci_pci_enable_dma,
1749         .set_bus_width  = sdhci_set_bus_width,
1750         .reset          = sdhci_reset,
1751         .set_uhs_signaling = sdhci_set_uhs_signaling,
1752         .hw_reset               = sdhci_pci_hw_reset,
1753 };
1754
1755 /*****************************************************************************\
1756  *                                                                           *
1757  * Suspend/resume                                                            *
1758  *                                                                           *
1759 \*****************************************************************************/
1760
1761 #ifdef CONFIG_PM_SLEEP
1762 static int sdhci_pci_suspend(struct device *dev)
1763 {
1764         struct pci_dev *pdev = to_pci_dev(dev);
1765         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1766
1767         if (!chip)
1768                 return 0;
1769
1770         if (chip->fixes && chip->fixes->suspend)
1771                 return chip->fixes->suspend(chip);
1772
1773         return sdhci_pci_suspend_host(chip);
1774 }
1775
1776 static int sdhci_pci_resume(struct device *dev)
1777 {
1778         struct pci_dev *pdev = to_pci_dev(dev);
1779         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1780
1781         if (!chip)
1782                 return 0;
1783
1784         if (chip->fixes && chip->fixes->resume)
1785                 return chip->fixes->resume(chip);
1786
1787         return sdhci_pci_resume_host(chip);
1788 }
1789 #endif
1790
1791 #ifdef CONFIG_PM
1792 static int sdhci_pci_runtime_suspend(struct device *dev)
1793 {
1794         struct pci_dev *pdev = to_pci_dev(dev);
1795         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1796
1797         if (!chip)
1798                 return 0;
1799
1800         if (chip->fixes && chip->fixes->runtime_suspend)
1801                 return chip->fixes->runtime_suspend(chip);
1802
1803         return sdhci_pci_runtime_suspend_host(chip);
1804 }
1805
1806 static int sdhci_pci_runtime_resume(struct device *dev)
1807 {
1808         struct pci_dev *pdev = to_pci_dev(dev);
1809         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1810
1811         if (!chip)
1812                 return 0;
1813
1814         if (chip->fixes && chip->fixes->runtime_resume)
1815                 return chip->fixes->runtime_resume(chip);
1816
1817         return sdhci_pci_runtime_resume_host(chip);
1818 }
1819 #endif
1820
1821 static const struct dev_pm_ops sdhci_pci_pm_ops = {
1822         SET_SYSTEM_SLEEP_PM_OPS(sdhci_pci_suspend, sdhci_pci_resume)
1823         SET_RUNTIME_PM_OPS(sdhci_pci_runtime_suspend,
1824                         sdhci_pci_runtime_resume, NULL)
1825 };
1826
1827 /*****************************************************************************\
1828  *                                                                           *
1829  * Device probing/removal                                                    *
1830  *                                                                           *
1831 \*****************************************************************************/
1832
1833 static struct sdhci_pci_slot *sdhci_pci_probe_slot(
1834         struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
1835         int slotno)
1836 {
1837         struct sdhci_pci_slot *slot;
1838         struct sdhci_host *host;
1839         int ret, bar = first_bar + slotno;
1840         size_t priv_size = chip->fixes ? chip->fixes->priv_size : 0;
1841
1842         if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
1843                 dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
1844                 return ERR_PTR(-ENODEV);
1845         }
1846
1847         if (pci_resource_len(pdev, bar) < 0x100) {
1848                 dev_err(&pdev->dev, "Invalid iomem size. You may "
1849                         "experience problems.\n");
1850         }
1851
1852         if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1853                 dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
1854                 return ERR_PTR(-ENODEV);
1855         }
1856
1857         if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1858                 dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
1859                 return ERR_PTR(-ENODEV);
1860         }
1861
1862         host = sdhci_alloc_host(&pdev->dev, sizeof(*slot) + priv_size);
1863         if (IS_ERR(host)) {
1864                 dev_err(&pdev->dev, "cannot allocate host\n");
1865                 return ERR_CAST(host);
1866         }
1867
1868         slot = sdhci_priv(host);
1869
1870         slot->chip = chip;
1871         slot->host = host;
1872         slot->rst_n_gpio = -EINVAL;
1873         slot->cd_gpio = -EINVAL;
1874         slot->cd_idx = -1;
1875
1876         /* Retrieve platform data if there is any */
1877         if (*sdhci_pci_get_data)
1878                 slot->data = sdhci_pci_get_data(pdev, slotno);
1879
1880         if (slot->data) {
1881                 if (slot->data->setup) {
1882                         ret = slot->data->setup(slot->data);
1883                         if (ret) {
1884                                 dev_err(&pdev->dev, "platform setup failed\n");
1885                                 goto free;
1886                         }
1887                 }
1888                 slot->rst_n_gpio = slot->data->rst_n_gpio;
1889                 slot->cd_gpio = slot->data->cd_gpio;
1890         }
1891
1892         host->hw_name = "PCI";
1893         host->ops = chip->fixes && chip->fixes->ops ?
1894                     chip->fixes->ops :
1895                     &sdhci_pci_ops;
1896         host->quirks = chip->quirks;
1897         host->quirks2 = chip->quirks2;
1898
1899         host->irq = pdev->irq;
1900
1901         ret = pcim_iomap_regions(pdev, BIT(bar), mmc_hostname(host->mmc));
1902         if (ret) {
1903                 dev_err(&pdev->dev, "cannot request region\n");
1904                 goto cleanup;
1905         }
1906
1907         host->ioaddr = pcim_iomap_table(pdev)[bar];
1908
1909         if (chip->fixes && chip->fixes->probe_slot) {
1910                 ret = chip->fixes->probe_slot(slot);
1911                 if (ret)
1912                         goto cleanup;
1913         }
1914
1915         if (gpio_is_valid(slot->rst_n_gpio)) {
1916                 if (!devm_gpio_request(&pdev->dev, slot->rst_n_gpio, "eMMC_reset")) {
1917                         gpio_direction_output(slot->rst_n_gpio, 1);
1918                         slot->host->mmc->caps |= MMC_CAP_HW_RESET;
1919                         slot->hw_reset = sdhci_pci_gpio_hw_reset;
1920                 } else {
1921                         dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
1922                         slot->rst_n_gpio = -EINVAL;
1923                 }
1924         }
1925
1926         host->mmc->pm_caps = MMC_PM_KEEP_POWER;
1927         host->mmc->slotno = slotno;
1928         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
1929
1930         if (device_can_wakeup(&pdev->dev))
1931                 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
1932
1933         if (host->mmc->caps & MMC_CAP_CD_WAKE)
1934                 device_init_wakeup(&pdev->dev, true);
1935
1936         if (slot->cd_idx >= 0) {
1937                 ret = mmc_gpiod_request_cd(host->mmc, "cd", slot->cd_idx,
1938                                            slot->cd_override_level, 0, NULL);
1939                 if (ret && ret != -EPROBE_DEFER)
1940                         ret = mmc_gpiod_request_cd(host->mmc, NULL,
1941                                                    slot->cd_idx,
1942                                                    slot->cd_override_level,
1943                                                    0, NULL);
1944                 if (ret == -EPROBE_DEFER)
1945                         goto remove;
1946
1947                 if (ret) {
1948                         dev_warn(&pdev->dev, "failed to setup card detect gpio\n");
1949                         slot->cd_idx = -1;
1950                 }
1951         }
1952
1953         if (chip->fixes && chip->fixes->add_host)
1954                 ret = chip->fixes->add_host(slot);
1955         else
1956                 ret = sdhci_add_host(host);
1957         if (ret)
1958                 goto remove;
1959
1960         sdhci_pci_add_own_cd(slot);
1961
1962         /*
1963          * Check if the chip needs a separate GPIO for card detect to wake up
1964          * from runtime suspend.  If it is not there, don't allow runtime PM.
1965          * Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure.
1966          */
1967         if (chip->fixes && chip->fixes->own_cd_for_runtime_pm &&
1968             !gpio_is_valid(slot->cd_gpio) && slot->cd_idx < 0)
1969                 chip->allow_runtime_pm = false;
1970
1971         return slot;
1972
1973 remove:
1974         if (chip->fixes && chip->fixes->remove_slot)
1975                 chip->fixes->remove_slot(slot, 0);
1976
1977 cleanup:
1978         if (slot->data && slot->data->cleanup)
1979                 slot->data->cleanup(slot->data);
1980
1981 free:
1982         sdhci_free_host(host);
1983
1984         return ERR_PTR(ret);
1985 }
1986
1987 static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
1988 {
1989         int dead;
1990         u32 scratch;
1991
1992         sdhci_pci_remove_own_cd(slot);
1993
1994         dead = 0;
1995         scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
1996         if (scratch == (u32)-1)
1997                 dead = 1;
1998
1999         sdhci_remove_host(slot->host, dead);
2000
2001         if (slot->chip->fixes && slot->chip->fixes->remove_slot)
2002                 slot->chip->fixes->remove_slot(slot, dead);
2003
2004         if (slot->data && slot->data->cleanup)
2005                 slot->data->cleanup(slot->data);
2006
2007         sdhci_free_host(slot->host);
2008 }
2009
2010 static void sdhci_pci_runtime_pm_allow(struct device *dev)
2011 {
2012         pm_suspend_ignore_children(dev, 1);
2013         pm_runtime_set_autosuspend_delay(dev, 50);
2014         pm_runtime_use_autosuspend(dev);
2015         pm_runtime_allow(dev);
2016         /* Stay active until mmc core scans for a card */
2017         pm_runtime_put_noidle(dev);
2018 }
2019
2020 static void sdhci_pci_runtime_pm_forbid(struct device *dev)
2021 {
2022         pm_runtime_forbid(dev);
2023         pm_runtime_get_noresume(dev);
2024 }
2025
2026 static int sdhci_pci_probe(struct pci_dev *pdev,
2027                                      const struct pci_device_id *ent)
2028 {
2029         struct sdhci_pci_chip *chip;
2030         struct sdhci_pci_slot *slot;
2031
2032         u8 slots, first_bar;
2033         int ret, i;
2034
2035         BUG_ON(pdev == NULL);
2036         BUG_ON(ent == NULL);
2037
2038         dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
2039                  (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
2040
2041         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
2042         if (ret)
2043                 return ret;
2044
2045         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
2046         dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
2047         if (slots == 0)
2048                 return -ENODEV;
2049
2050         BUG_ON(slots > MAX_SLOTS);
2051
2052         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
2053         if (ret)
2054                 return ret;
2055
2056         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
2057
2058         if (first_bar > 5) {
2059                 dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
2060                 return -ENODEV;
2061         }
2062
2063         ret = pcim_enable_device(pdev);
2064         if (ret)
2065                 return ret;
2066
2067         chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
2068         if (!chip)
2069                 return -ENOMEM;
2070
2071         chip->pdev = pdev;
2072         chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
2073         if (chip->fixes) {
2074                 chip->quirks = chip->fixes->quirks;
2075                 chip->quirks2 = chip->fixes->quirks2;
2076                 chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
2077         }
2078         chip->num_slots = slots;
2079         chip->pm_retune = true;
2080         chip->rpm_retune = true;
2081
2082         pci_set_drvdata(pdev, chip);
2083
2084         if (chip->fixes && chip->fixes->probe) {
2085                 ret = chip->fixes->probe(chip);
2086                 if (ret)
2087                         return ret;
2088         }
2089
2090         slots = chip->num_slots;        /* Quirk may have changed this */
2091
2092         for (i = 0; i < slots; i++) {
2093                 slot = sdhci_pci_probe_slot(pdev, chip, first_bar, i);
2094                 if (IS_ERR(slot)) {
2095                         for (i--; i >= 0; i--)
2096                                 sdhci_pci_remove_slot(chip->slots[i]);
2097                         return PTR_ERR(slot);
2098                 }
2099
2100                 chip->slots[i] = slot;
2101         }
2102
2103         if (chip->allow_runtime_pm)
2104                 sdhci_pci_runtime_pm_allow(&pdev->dev);
2105
2106         return 0;
2107 }
2108
2109 static void sdhci_pci_remove(struct pci_dev *pdev)
2110 {
2111         int i;
2112         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
2113
2114         if (chip->allow_runtime_pm)
2115                 sdhci_pci_runtime_pm_forbid(&pdev->dev);
2116
2117         for (i = 0; i < chip->num_slots; i++)
2118                 sdhci_pci_remove_slot(chip->slots[i]);
2119 }
2120
2121 static struct pci_driver sdhci_driver = {
2122         .name =         "sdhci-pci",
2123         .id_table =     pci_ids,
2124         .probe =        sdhci_pci_probe,
2125         .remove =       sdhci_pci_remove,
2126         .driver =       {
2127                 .pm =   &sdhci_pci_pm_ops
2128         },
2129 };
2130
2131 module_pci_driver(sdhci_driver);
2132
2133 MODULE_AUTHOR("Pierre Ossman <[email protected]>");
2134 MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
2135 MODULE_LICENSE("GPL");
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