Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[sfrench/cifs-2.6.git] / drivers / mmc / host / sdhci-pci-core.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*  linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface
3  *
4  *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
5  *
6  * Thanks to the following companies for their support:
7  *
8  *     - JMicron (hardware and technical support)
9  */
10
11 #include <linux/bitfield.h>
12 #include <linux/string.h>
13 #include <linux/delay.h>
14 #include <linux/highmem.h>
15 #include <linux/module.h>
16 #include <linux/pci.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/slab.h>
19 #include <linux/device.h>
20 #include <linux/mmc/host.h>
21 #include <linux/mmc/mmc.h>
22 #include <linux/scatterlist.h>
23 #include <linux/io.h>
24 #include <linux/gpio.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/mmc/slot-gpio.h>
27 #include <linux/mmc/sdhci-pci-data.h>
28 #include <linux/acpi.h>
29
30 #ifdef CONFIG_X86
31 #include <asm/iosf_mbi.h>
32 #endif
33
34 #include "cqhci.h"
35
36 #include "sdhci.h"
37 #include "sdhci-pci.h"
38
39 static void sdhci_pci_hw_reset(struct sdhci_host *host);
40
41 #ifdef CONFIG_PM_SLEEP
42 static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip)
43 {
44         mmc_pm_flag_t pm_flags = 0;
45         bool cap_cd_wake = false;
46         int i;
47
48         for (i = 0; i < chip->num_slots; i++) {
49                 struct sdhci_pci_slot *slot = chip->slots[i];
50
51                 if (slot) {
52                         pm_flags |= slot->host->mmc->pm_flags;
53                         if (slot->host->mmc->caps & MMC_CAP_CD_WAKE)
54                                 cap_cd_wake = true;
55                 }
56         }
57
58         if ((pm_flags & MMC_PM_KEEP_POWER) && (pm_flags & MMC_PM_WAKE_SDIO_IRQ))
59                 return device_wakeup_enable(&chip->pdev->dev);
60         else if (!cap_cd_wake)
61                 return device_wakeup_disable(&chip->pdev->dev);
62
63         return 0;
64 }
65
66 static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
67 {
68         int i, ret;
69
70         sdhci_pci_init_wakeup(chip);
71
72         for (i = 0; i < chip->num_slots; i++) {
73                 struct sdhci_pci_slot *slot = chip->slots[i];
74                 struct sdhci_host *host;
75
76                 if (!slot)
77                         continue;
78
79                 host = slot->host;
80
81                 if (chip->pm_retune && host->tuning_mode != SDHCI_TUNING_MODE_3)
82                         mmc_retune_needed(host->mmc);
83
84                 ret = sdhci_suspend_host(host);
85                 if (ret)
86                         goto err_pci_suspend;
87
88                 if (device_may_wakeup(&chip->pdev->dev))
89                         mmc_gpio_set_cd_wake(host->mmc, true);
90         }
91
92         return 0;
93
94 err_pci_suspend:
95         while (--i >= 0)
96                 sdhci_resume_host(chip->slots[i]->host);
97         return ret;
98 }
99
100 int sdhci_pci_resume_host(struct sdhci_pci_chip *chip)
101 {
102         struct sdhci_pci_slot *slot;
103         int i, ret;
104
105         for (i = 0; i < chip->num_slots; i++) {
106                 slot = chip->slots[i];
107                 if (!slot)
108                         continue;
109
110                 ret = sdhci_resume_host(slot->host);
111                 if (ret)
112                         return ret;
113
114                 mmc_gpio_set_cd_wake(slot->host->mmc, false);
115         }
116
117         return 0;
118 }
119
120 static int sdhci_cqhci_suspend(struct sdhci_pci_chip *chip)
121 {
122         int ret;
123
124         ret = cqhci_suspend(chip->slots[0]->host->mmc);
125         if (ret)
126                 return ret;
127
128         return sdhci_pci_suspend_host(chip);
129 }
130
131 static int sdhci_cqhci_resume(struct sdhci_pci_chip *chip)
132 {
133         int ret;
134
135         ret = sdhci_pci_resume_host(chip);
136         if (ret)
137                 return ret;
138
139         return cqhci_resume(chip->slots[0]->host->mmc);
140 }
141 #endif
142
143 #ifdef CONFIG_PM
144 static int sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip *chip)
145 {
146         struct sdhci_pci_slot *slot;
147         struct sdhci_host *host;
148         int i, ret;
149
150         for (i = 0; i < chip->num_slots; i++) {
151                 slot = chip->slots[i];
152                 if (!slot)
153                         continue;
154
155                 host = slot->host;
156
157                 ret = sdhci_runtime_suspend_host(host);
158                 if (ret)
159                         goto err_pci_runtime_suspend;
160
161                 if (chip->rpm_retune &&
162                     host->tuning_mode != SDHCI_TUNING_MODE_3)
163                         mmc_retune_needed(host->mmc);
164         }
165
166         return 0;
167
168 err_pci_runtime_suspend:
169         while (--i >= 0)
170                 sdhci_runtime_resume_host(chip->slots[i]->host, 0);
171         return ret;
172 }
173
174 static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip)
175 {
176         struct sdhci_pci_slot *slot;
177         int i, ret;
178
179         for (i = 0; i < chip->num_slots; i++) {
180                 slot = chip->slots[i];
181                 if (!slot)
182                         continue;
183
184                 ret = sdhci_runtime_resume_host(slot->host, 0);
185                 if (ret)
186                         return ret;
187         }
188
189         return 0;
190 }
191
192 static int sdhci_cqhci_runtime_suspend(struct sdhci_pci_chip *chip)
193 {
194         int ret;
195
196         ret = cqhci_suspend(chip->slots[0]->host->mmc);
197         if (ret)
198                 return ret;
199
200         return sdhci_pci_runtime_suspend_host(chip);
201 }
202
203 static int sdhci_cqhci_runtime_resume(struct sdhci_pci_chip *chip)
204 {
205         int ret;
206
207         ret = sdhci_pci_runtime_resume_host(chip);
208         if (ret)
209                 return ret;
210
211         return cqhci_resume(chip->slots[0]->host->mmc);
212 }
213 #endif
214
215 static u32 sdhci_cqhci_irq(struct sdhci_host *host, u32 intmask)
216 {
217         int cmd_error = 0;
218         int data_error = 0;
219
220         if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
221                 return intmask;
222
223         cqhci_irq(host->mmc, intmask, cmd_error, data_error);
224
225         return 0;
226 }
227
228 static void sdhci_pci_dumpregs(struct mmc_host *mmc)
229 {
230         sdhci_dumpregs(mmc_priv(mmc));
231 }
232
233 /*****************************************************************************\
234  *                                                                           *
235  * Hardware specific quirk handling                                          *
236  *                                                                           *
237 \*****************************************************************************/
238
239 static int ricoh_probe(struct sdhci_pci_chip *chip)
240 {
241         if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
242             chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
243                 chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
244         return 0;
245 }
246
247 static int ricoh_mmc_probe_slot(struct sdhci_pci_slot *slot)
248 {
249         slot->host->caps =
250                 ((0x21 << SDHCI_TIMEOUT_CLK_SHIFT)
251                         & SDHCI_TIMEOUT_CLK_MASK) |
252
253                 ((0x21 << SDHCI_CLOCK_BASE_SHIFT)
254                         & SDHCI_CLOCK_BASE_MASK) |
255
256                 SDHCI_TIMEOUT_CLK_UNIT |
257                 SDHCI_CAN_VDD_330 |
258                 SDHCI_CAN_DO_HISPD |
259                 SDHCI_CAN_DO_SDMA;
260         return 0;
261 }
262
263 #ifdef CONFIG_PM_SLEEP
264 static int ricoh_mmc_resume(struct sdhci_pci_chip *chip)
265 {
266         /* Apply a delay to allow controller to settle */
267         /* Otherwise it becomes confused if card state changed
268                 during suspend */
269         msleep(500);
270         return sdhci_pci_resume_host(chip);
271 }
272 #endif
273
274 static const struct sdhci_pci_fixes sdhci_ricoh = {
275         .probe          = ricoh_probe,
276         .quirks         = SDHCI_QUIRK_32BIT_DMA_ADDR |
277                           SDHCI_QUIRK_FORCE_DMA |
278                           SDHCI_QUIRK_CLOCK_BEFORE_RESET,
279 };
280
281 static const struct sdhci_pci_fixes sdhci_ricoh_mmc = {
282         .probe_slot     = ricoh_mmc_probe_slot,
283 #ifdef CONFIG_PM_SLEEP
284         .resume         = ricoh_mmc_resume,
285 #endif
286         .quirks         = SDHCI_QUIRK_32BIT_DMA_ADDR |
287                           SDHCI_QUIRK_CLOCK_BEFORE_RESET |
288                           SDHCI_QUIRK_NO_CARD_NO_RESET |
289                           SDHCI_QUIRK_MISSING_CAPS
290 };
291
292 static const struct sdhci_pci_fixes sdhci_ene_712 = {
293         .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
294                           SDHCI_QUIRK_BROKEN_DMA,
295 };
296
297 static const struct sdhci_pci_fixes sdhci_ene_714 = {
298         .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
299                           SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
300                           SDHCI_QUIRK_BROKEN_DMA,
301 };
302
303 static const struct sdhci_pci_fixes sdhci_cafe = {
304         .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
305                           SDHCI_QUIRK_NO_BUSY_IRQ |
306                           SDHCI_QUIRK_BROKEN_CARD_DETECTION |
307                           SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
308 };
309
310 static const struct sdhci_pci_fixes sdhci_intel_qrk = {
311         .quirks         = SDHCI_QUIRK_NO_HISPD_BIT,
312 };
313
314 static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
315 {
316         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
317         return 0;
318 }
319
320 /*
321  * ADMA operation is disabled for Moorestown platform due to
322  * hardware bugs.
323  */
324 static int mrst_hc_probe(struct sdhci_pci_chip *chip)
325 {
326         /*
327          * slots number is fixed here for MRST as SDIO3/5 are never used and
328          * have hardware bugs.
329          */
330         chip->num_slots = 1;
331         return 0;
332 }
333
334 static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
335 {
336         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
337         return 0;
338 }
339
340 #ifdef CONFIG_PM
341
342 static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
343 {
344         struct sdhci_pci_slot *slot = dev_id;
345         struct sdhci_host *host = slot->host;
346
347         mmc_detect_change(host->mmc, msecs_to_jiffies(200));
348         return IRQ_HANDLED;
349 }
350
351 static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
352 {
353         int err, irq, gpio = slot->cd_gpio;
354
355         slot->cd_gpio = -EINVAL;
356         slot->cd_irq = -EINVAL;
357
358         if (!gpio_is_valid(gpio))
359                 return;
360
361         err = devm_gpio_request(&slot->chip->pdev->dev, gpio, "sd_cd");
362         if (err < 0)
363                 goto out;
364
365         err = gpio_direction_input(gpio);
366         if (err < 0)
367                 goto out_free;
368
369         irq = gpio_to_irq(gpio);
370         if (irq < 0)
371                 goto out_free;
372
373         err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
374                           IRQF_TRIGGER_FALLING, "sd_cd", slot);
375         if (err)
376                 goto out_free;
377
378         slot->cd_gpio = gpio;
379         slot->cd_irq = irq;
380
381         return;
382
383 out_free:
384         devm_gpio_free(&slot->chip->pdev->dev, gpio);
385 out:
386         dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
387 }
388
389 static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
390 {
391         if (slot->cd_irq >= 0)
392                 free_irq(slot->cd_irq, slot);
393 }
394
395 #else
396
397 static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
398 {
399 }
400
401 static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
402 {
403 }
404
405 #endif
406
407 static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
408 {
409         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
410         slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC;
411         return 0;
412 }
413
414 static int mfd_sdio_probe_slot(struct sdhci_pci_slot *slot)
415 {
416         slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE;
417         return 0;
418 }
419
420 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
421         .quirks         = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
422         .probe_slot     = mrst_hc_probe_slot,
423 };
424
425 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
426         .quirks         = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
427         .probe          = mrst_hc_probe,
428 };
429
430 static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
431         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
432         .allow_runtime_pm = true,
433         .own_cd_for_runtime_pm = true,
434 };
435
436 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
437         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
438         .quirks2        = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
439         .allow_runtime_pm = true,
440         .probe_slot     = mfd_sdio_probe_slot,
441 };
442
443 static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
444         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
445         .allow_runtime_pm = true,
446         .probe_slot     = mfd_emmc_probe_slot,
447 };
448
449 static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
450         .quirks         = SDHCI_QUIRK_BROKEN_ADMA,
451         .probe_slot     = pch_hc_probe_slot,
452 };
453
454 #ifdef CONFIG_X86
455
456 #define BYT_IOSF_SCCEP                  0x63
457 #define BYT_IOSF_OCP_NETCTRL0           0x1078
458 #define BYT_IOSF_OCP_TIMEOUT_BASE       GENMASK(10, 8)
459
460 static void byt_ocp_setting(struct pci_dev *pdev)
461 {
462         u32 val = 0;
463
464         if (pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC &&
465             pdev->device != PCI_DEVICE_ID_INTEL_BYT_SDIO &&
466             pdev->device != PCI_DEVICE_ID_INTEL_BYT_SD &&
467             pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC2)
468                 return;
469
470         if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
471                           &val)) {
472                 dev_err(&pdev->dev, "%s read error\n", __func__);
473                 return;
474         }
475
476         if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
477                 return;
478
479         val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
480
481         if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
482                            val)) {
483                 dev_err(&pdev->dev, "%s write error\n", __func__);
484                 return;
485         }
486
487         dev_dbg(&pdev->dev, "%s completed\n", __func__);
488 }
489
490 #else
491
492 static inline void byt_ocp_setting(struct pci_dev *pdev)
493 {
494 }
495
496 #endif
497
498 enum {
499         INTEL_DSM_FNS           =  0,
500         INTEL_DSM_V18_SWITCH    =  3,
501         INTEL_DSM_V33_SWITCH    =  4,
502         INTEL_DSM_DRV_STRENGTH  =  9,
503         INTEL_DSM_D3_RETUNE     = 10,
504 };
505
506 struct intel_host {
507         u32     dsm_fns;
508         int     drv_strength;
509         bool    d3_retune;
510         bool    rpm_retune_ok;
511         u32     glk_rx_ctrl1;
512         u32     glk_tun_val;
513 };
514
515 static const guid_t intel_dsm_guid =
516         GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
517                   0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
518
519 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
520                        unsigned int fn, u32 *result)
521 {
522         union acpi_object *obj;
523         int err = 0;
524         size_t len;
525
526         obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
527         if (!obj)
528                 return -EOPNOTSUPP;
529
530         if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < 1) {
531                 err = -EINVAL;
532                 goto out;
533         }
534
535         len = min_t(size_t, obj->buffer.length, 4);
536
537         *result = 0;
538         memcpy(result, obj->buffer.pointer, len);
539 out:
540         ACPI_FREE(obj);
541
542         return err;
543 }
544
545 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
546                      unsigned int fn, u32 *result)
547 {
548         if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
549                 return -EOPNOTSUPP;
550
551         return __intel_dsm(intel_host, dev, fn, result);
552 }
553
554 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
555                            struct mmc_host *mmc)
556 {
557         int err;
558         u32 val;
559
560         intel_host->d3_retune = true;
561
562         err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
563         if (err) {
564                 pr_debug("%s: DSM not supported, error %d\n",
565                          mmc_hostname(mmc), err);
566                 return;
567         }
568
569         pr_debug("%s: DSM function mask %#x\n",
570                  mmc_hostname(mmc), intel_host->dsm_fns);
571
572         err = intel_dsm(intel_host, dev, INTEL_DSM_DRV_STRENGTH, &val);
573         intel_host->drv_strength = err ? 0 : val;
574
575         err = intel_dsm(intel_host, dev, INTEL_DSM_D3_RETUNE, &val);
576         intel_host->d3_retune = err ? true : !!val;
577 }
578
579 static void sdhci_pci_int_hw_reset(struct sdhci_host *host)
580 {
581         u8 reg;
582
583         reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
584         reg |= 0x10;
585         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
586         /* For eMMC, minimum is 1us but give it 9us for good measure */
587         udelay(9);
588         reg &= ~0x10;
589         sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
590         /* For eMMC, minimum is 200us but give it 300us for good measure */
591         usleep_range(300, 1000);
592 }
593
594 static int intel_select_drive_strength(struct mmc_card *card,
595                                        unsigned int max_dtr, int host_drv,
596                                        int card_drv, int *drv_type)
597 {
598         struct sdhci_host *host = mmc_priv(card->host);
599         struct sdhci_pci_slot *slot = sdhci_priv(host);
600         struct intel_host *intel_host = sdhci_pci_priv(slot);
601
602         return intel_host->drv_strength;
603 }
604
605 static int bxt_get_cd(struct mmc_host *mmc)
606 {
607         int gpio_cd = mmc_gpio_get_cd(mmc);
608         struct sdhci_host *host = mmc_priv(mmc);
609         unsigned long flags;
610         int ret = 0;
611
612         if (!gpio_cd)
613                 return 0;
614
615         spin_lock_irqsave(&host->lock, flags);
616
617         if (host->flags & SDHCI_DEVICE_DEAD)
618                 goto out;
619
620         ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
621 out:
622         spin_unlock_irqrestore(&host->lock, flags);
623
624         return ret;
625 }
626
627 #define SDHCI_INTEL_PWR_TIMEOUT_CNT     20
628 #define SDHCI_INTEL_PWR_TIMEOUT_UDELAY  100
629
630 static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode,
631                                   unsigned short vdd)
632 {
633         int cntr;
634         u8 reg;
635
636         sdhci_set_power(host, mode, vdd);
637
638         if (mode == MMC_POWER_OFF)
639                 return;
640
641         /*
642          * Bus power might not enable after D3 -> D0 transition due to the
643          * present state not yet having propagated. Retry for up to 2ms.
644          */
645         for (cntr = 0; cntr < SDHCI_INTEL_PWR_TIMEOUT_CNT; cntr++) {
646                 reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
647                 if (reg & SDHCI_POWER_ON)
648                         break;
649                 udelay(SDHCI_INTEL_PWR_TIMEOUT_UDELAY);
650                 reg |= SDHCI_POWER_ON;
651                 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
652         }
653 }
654
655 #define INTEL_HS400_ES_REG 0x78
656 #define INTEL_HS400_ES_BIT BIT(0)
657
658 static void intel_hs400_enhanced_strobe(struct mmc_host *mmc,
659                                         struct mmc_ios *ios)
660 {
661         struct sdhci_host *host = mmc_priv(mmc);
662         u32 val;
663
664         val = sdhci_readl(host, INTEL_HS400_ES_REG);
665         if (ios->enhanced_strobe)
666                 val |= INTEL_HS400_ES_BIT;
667         else
668                 val &= ~INTEL_HS400_ES_BIT;
669         sdhci_writel(host, val, INTEL_HS400_ES_REG);
670 }
671
672 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
673                                              struct mmc_ios *ios)
674 {
675         struct device *dev = mmc_dev(mmc);
676         struct sdhci_host *host = mmc_priv(mmc);
677         struct sdhci_pci_slot *slot = sdhci_priv(host);
678         struct intel_host *intel_host = sdhci_pci_priv(slot);
679         unsigned int fn;
680         u32 result = 0;
681         int err;
682
683         err = sdhci_start_signal_voltage_switch(mmc, ios);
684         if (err)
685                 return err;
686
687         switch (ios->signal_voltage) {
688         case MMC_SIGNAL_VOLTAGE_330:
689                 fn = INTEL_DSM_V33_SWITCH;
690                 break;
691         case MMC_SIGNAL_VOLTAGE_180:
692                 fn = INTEL_DSM_V18_SWITCH;
693                 break;
694         default:
695                 return 0;
696         }
697
698         err = intel_dsm(intel_host, dev, fn, &result);
699         pr_debug("%s: %s DSM fn %u error %d result %u\n",
700                  mmc_hostname(mmc), __func__, fn, err, result);
701
702         return 0;
703 }
704
705 static const struct sdhci_ops sdhci_intel_byt_ops = {
706         .set_clock              = sdhci_set_clock,
707         .set_power              = sdhci_intel_set_power,
708         .enable_dma             = sdhci_pci_enable_dma,
709         .set_bus_width          = sdhci_set_bus_width,
710         .reset                  = sdhci_reset,
711         .set_uhs_signaling      = sdhci_set_uhs_signaling,
712         .hw_reset               = sdhci_pci_hw_reset,
713 };
714
715 static const struct sdhci_ops sdhci_intel_glk_ops = {
716         .set_clock              = sdhci_set_clock,
717         .set_power              = sdhci_intel_set_power,
718         .enable_dma             = sdhci_pci_enable_dma,
719         .set_bus_width          = sdhci_set_bus_width,
720         .reset                  = sdhci_reset,
721         .set_uhs_signaling      = sdhci_set_uhs_signaling,
722         .hw_reset               = sdhci_pci_hw_reset,
723         .irq                    = sdhci_cqhci_irq,
724 };
725
726 static void byt_read_dsm(struct sdhci_pci_slot *slot)
727 {
728         struct intel_host *intel_host = sdhci_pci_priv(slot);
729         struct device *dev = &slot->chip->pdev->dev;
730         struct mmc_host *mmc = slot->host->mmc;
731
732         intel_dsm_init(intel_host, dev, mmc);
733         slot->chip->rpm_retune = intel_host->d3_retune;
734 }
735
736 static int intel_execute_tuning(struct mmc_host *mmc, u32 opcode)
737 {
738         int err = sdhci_execute_tuning(mmc, opcode);
739         struct sdhci_host *host = mmc_priv(mmc);
740
741         if (err)
742                 return err;
743
744         /*
745          * Tuning can leave the IP in an active state (Buffer Read Enable bit
746          * set) which prevents the entry to low power states (i.e. S0i3). Data
747          * reset will clear it.
748          */
749         sdhci_reset(host, SDHCI_RESET_DATA);
750
751         return 0;
752 }
753
754 static void byt_probe_slot(struct sdhci_pci_slot *slot)
755 {
756         struct mmc_host_ops *ops = &slot->host->mmc_host_ops;
757         struct device *dev = &slot->chip->pdev->dev;
758         struct mmc_host *mmc = slot->host->mmc;
759
760         byt_read_dsm(slot);
761
762         byt_ocp_setting(slot->chip->pdev);
763
764         ops->execute_tuning = intel_execute_tuning;
765         ops->start_signal_voltage_switch = intel_start_signal_voltage_switch;
766
767         device_property_read_u32(dev, "max-frequency", &mmc->f_max);
768 }
769
770 static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
771 {
772         byt_probe_slot(slot);
773         slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
774                                  MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
775                                  MMC_CAP_CMD_DURING_TFR |
776                                  MMC_CAP_WAIT_WHILE_BUSY;
777         slot->hw_reset = sdhci_pci_int_hw_reset;
778         if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC)
779                 slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
780         slot->host->mmc_host_ops.select_drive_strength =
781                                                 intel_select_drive_strength;
782         return 0;
783 }
784
785 static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
786 {
787         int ret = byt_emmc_probe_slot(slot);
788
789         slot->host->mmc->caps2 |= MMC_CAP2_CQE;
790
791         if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
792                 slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES,
793                 slot->host->mmc_host_ops.hs400_enhanced_strobe =
794                                                 intel_hs400_enhanced_strobe;
795                 slot->host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
796         }
797
798         return ret;
799 }
800
801 static const struct cqhci_host_ops glk_cqhci_ops = {
802         .enable         = sdhci_cqe_enable,
803         .disable        = sdhci_cqe_disable,
804         .dumpregs       = sdhci_pci_dumpregs,
805 };
806
807 static int glk_emmc_add_host(struct sdhci_pci_slot *slot)
808 {
809         struct device *dev = &slot->chip->pdev->dev;
810         struct sdhci_host *host = slot->host;
811         struct cqhci_host *cq_host;
812         bool dma64;
813         int ret;
814
815         ret = sdhci_setup_host(host);
816         if (ret)
817                 return ret;
818
819         cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
820         if (!cq_host) {
821                 ret = -ENOMEM;
822                 goto cleanup;
823         }
824
825         cq_host->mmio = host->ioaddr + 0x200;
826         cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ;
827         cq_host->ops = &glk_cqhci_ops;
828
829         dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
830         if (dma64)
831                 cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
832
833         ret = cqhci_init(cq_host, host->mmc, dma64);
834         if (ret)
835                 goto cleanup;
836
837         ret = __sdhci_add_host(host);
838         if (ret)
839                 goto cleanup;
840
841         return 0;
842
843 cleanup:
844         sdhci_cleanup_host(host);
845         return ret;
846 }
847
848 #ifdef CONFIG_PM
849 #define GLK_RX_CTRL1    0x834
850 #define GLK_TUN_VAL     0x840
851 #define GLK_PATH_PLL    GENMASK(13, 8)
852 #define GLK_DLY         GENMASK(6, 0)
853 /* Workaround firmware failing to restore the tuning value */
854 static void glk_rpm_retune_wa(struct sdhci_pci_chip *chip, bool susp)
855 {
856         struct sdhci_pci_slot *slot = chip->slots[0];
857         struct intel_host *intel_host = sdhci_pci_priv(slot);
858         struct sdhci_host *host = slot->host;
859         u32 glk_rx_ctrl1;
860         u32 glk_tun_val;
861         u32 dly;
862
863         if (intel_host->rpm_retune_ok || !mmc_can_retune(host->mmc))
864                 return;
865
866         glk_rx_ctrl1 = sdhci_readl(host, GLK_RX_CTRL1);
867         glk_tun_val = sdhci_readl(host, GLK_TUN_VAL);
868
869         if (susp) {
870                 intel_host->glk_rx_ctrl1 = glk_rx_ctrl1;
871                 intel_host->glk_tun_val = glk_tun_val;
872                 return;
873         }
874
875         if (!intel_host->glk_tun_val)
876                 return;
877
878         if (glk_rx_ctrl1 != intel_host->glk_rx_ctrl1) {
879                 intel_host->rpm_retune_ok = true;
880                 return;
881         }
882
883         dly = FIELD_PREP(GLK_DLY, FIELD_GET(GLK_PATH_PLL, glk_rx_ctrl1) +
884                                   (intel_host->glk_tun_val << 1));
885         if (dly == FIELD_GET(GLK_DLY, glk_rx_ctrl1))
886                 return;
887
888         glk_rx_ctrl1 = (glk_rx_ctrl1 & ~GLK_DLY) | dly;
889         sdhci_writel(host, glk_rx_ctrl1, GLK_RX_CTRL1);
890
891         intel_host->rpm_retune_ok = true;
892         chip->rpm_retune = true;
893         mmc_retune_needed(host->mmc);
894         pr_info("%s: Requiring re-tune after rpm resume", mmc_hostname(host->mmc));
895 }
896
897 static void glk_rpm_retune_chk(struct sdhci_pci_chip *chip, bool susp)
898 {
899         if (chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_EMMC &&
900             !chip->rpm_retune)
901                 glk_rpm_retune_wa(chip, susp);
902 }
903
904 static int glk_runtime_suspend(struct sdhci_pci_chip *chip)
905 {
906         glk_rpm_retune_chk(chip, true);
907
908         return sdhci_cqhci_runtime_suspend(chip);
909 }
910
911 static int glk_runtime_resume(struct sdhci_pci_chip *chip)
912 {
913         glk_rpm_retune_chk(chip, false);
914
915         return sdhci_cqhci_runtime_resume(chip);
916 }
917 #endif
918
919 #ifdef CONFIG_ACPI
920 static int ni_set_max_freq(struct sdhci_pci_slot *slot)
921 {
922         acpi_status status;
923         unsigned long long max_freq;
924
925         status = acpi_evaluate_integer(ACPI_HANDLE(&slot->chip->pdev->dev),
926                                        "MXFQ", NULL, &max_freq);
927         if (ACPI_FAILURE(status)) {
928                 dev_err(&slot->chip->pdev->dev,
929                         "MXFQ not found in acpi table\n");
930                 return -EINVAL;
931         }
932
933         slot->host->mmc->f_max = max_freq * 1000000;
934
935         return 0;
936 }
937 #else
938 static inline int ni_set_max_freq(struct sdhci_pci_slot *slot)
939 {
940         return 0;
941 }
942 #endif
943
944 static int ni_byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
945 {
946         int err;
947
948         byt_probe_slot(slot);
949
950         err = ni_set_max_freq(slot);
951         if (err)
952                 return err;
953
954         slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
955                                  MMC_CAP_WAIT_WHILE_BUSY;
956         return 0;
957 }
958
959 static int byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
960 {
961         byt_probe_slot(slot);
962         slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
963                                  MMC_CAP_WAIT_WHILE_BUSY;
964         return 0;
965 }
966
967 static int byt_sd_probe_slot(struct sdhci_pci_slot *slot)
968 {
969         byt_probe_slot(slot);
970         slot->host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY |
971                                  MMC_CAP_AGGRESSIVE_PM | MMC_CAP_CD_WAKE;
972         slot->cd_idx = 0;
973         slot->cd_override_level = true;
974         if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXT_SD ||
975             slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXTM_SD ||
976             slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_APL_SD ||
977             slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_SD)
978                 slot->host->mmc_host_ops.get_cd = bxt_get_cd;
979
980         if (slot->chip->pdev->subsystem_vendor == PCI_VENDOR_ID_NI &&
981             slot->chip->pdev->subsystem_device == PCI_SUBDEVICE_ID_NI_78E3)
982                 slot->host->mmc->caps2 |= MMC_CAP2_AVOID_3_3V;
983
984         return 0;
985 }
986
987 #ifdef CONFIG_PM_SLEEP
988
989 static int byt_resume(struct sdhci_pci_chip *chip)
990 {
991         byt_ocp_setting(chip->pdev);
992
993         return sdhci_pci_resume_host(chip);
994 }
995
996 #endif
997
998 #ifdef CONFIG_PM
999
1000 static int byt_runtime_resume(struct sdhci_pci_chip *chip)
1001 {
1002         byt_ocp_setting(chip->pdev);
1003
1004         return sdhci_pci_runtime_resume_host(chip);
1005 }
1006
1007 #endif
1008
1009 static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
1010 #ifdef CONFIG_PM_SLEEP
1011         .resume         = byt_resume,
1012 #endif
1013 #ifdef CONFIG_PM
1014         .runtime_resume = byt_runtime_resume,
1015 #endif
1016         .allow_runtime_pm = true,
1017         .probe_slot     = byt_emmc_probe_slot,
1018         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1019                           SDHCI_QUIRK_NO_LED,
1020         .quirks2        = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1021                           SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1022                           SDHCI_QUIRK2_STOP_WITH_TC,
1023         .ops            = &sdhci_intel_byt_ops,
1024         .priv_size      = sizeof(struct intel_host),
1025 };
1026
1027 static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = {
1028         .allow_runtime_pm       = true,
1029         .probe_slot             = glk_emmc_probe_slot,
1030         .add_host               = glk_emmc_add_host,
1031 #ifdef CONFIG_PM_SLEEP
1032         .suspend                = sdhci_cqhci_suspend,
1033         .resume                 = sdhci_cqhci_resume,
1034 #endif
1035 #ifdef CONFIG_PM
1036         .runtime_suspend        = glk_runtime_suspend,
1037         .runtime_resume         = glk_runtime_resume,
1038 #endif
1039         .quirks                 = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1040                                   SDHCI_QUIRK_NO_LED,
1041         .quirks2                = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1042                                   SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1043                                   SDHCI_QUIRK2_STOP_WITH_TC,
1044         .ops                    = &sdhci_intel_glk_ops,
1045         .priv_size              = sizeof(struct intel_host),
1046 };
1047
1048 static const struct sdhci_pci_fixes sdhci_ni_byt_sdio = {
1049 #ifdef CONFIG_PM_SLEEP
1050         .resume         = byt_resume,
1051 #endif
1052 #ifdef CONFIG_PM
1053         .runtime_resume = byt_runtime_resume,
1054 #endif
1055         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1056                           SDHCI_QUIRK_NO_LED,
1057         .quirks2        = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1058                           SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1059         .allow_runtime_pm = true,
1060         .probe_slot     = ni_byt_sdio_probe_slot,
1061         .ops            = &sdhci_intel_byt_ops,
1062         .priv_size      = sizeof(struct intel_host),
1063 };
1064
1065 static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
1066 #ifdef CONFIG_PM_SLEEP
1067         .resume         = byt_resume,
1068 #endif
1069 #ifdef CONFIG_PM
1070         .runtime_resume = byt_runtime_resume,
1071 #endif
1072         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1073                           SDHCI_QUIRK_NO_LED,
1074         .quirks2        = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1075                         SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1076         .allow_runtime_pm = true,
1077         .probe_slot     = byt_sdio_probe_slot,
1078         .ops            = &sdhci_intel_byt_ops,
1079         .priv_size      = sizeof(struct intel_host),
1080 };
1081
1082 static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
1083 #ifdef CONFIG_PM_SLEEP
1084         .resume         = byt_resume,
1085 #endif
1086 #ifdef CONFIG_PM
1087         .runtime_resume = byt_runtime_resume,
1088 #endif
1089         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1090                           SDHCI_QUIRK_NO_LED,
1091         .quirks2        = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
1092                           SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1093                           SDHCI_QUIRK2_STOP_WITH_TC,
1094         .allow_runtime_pm = true,
1095         .own_cd_for_runtime_pm = true,
1096         .probe_slot     = byt_sd_probe_slot,
1097         .ops            = &sdhci_intel_byt_ops,
1098         .priv_size      = sizeof(struct intel_host),
1099 };
1100
1101 /* Define Host controllers for Intel Merrifield platform */
1102 #define INTEL_MRFLD_EMMC_0      0
1103 #define INTEL_MRFLD_EMMC_1      1
1104 #define INTEL_MRFLD_SD          2
1105 #define INTEL_MRFLD_SDIO        3
1106
1107 #ifdef CONFIG_ACPI
1108 static void intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot *slot)
1109 {
1110         struct acpi_device *device, *child;
1111
1112         device = ACPI_COMPANION(&slot->chip->pdev->dev);
1113         if (!device)
1114                 return;
1115
1116         acpi_device_fix_up_power(device);
1117         list_for_each_entry(child, &device->children, node)
1118                 if (child->status.present && child->status.enabled)
1119                         acpi_device_fix_up_power(child);
1120 }
1121 #else
1122 static inline void intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot *slot) {}
1123 #endif
1124
1125 static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
1126 {
1127         unsigned int func = PCI_FUNC(slot->chip->pdev->devfn);
1128
1129         switch (func) {
1130         case INTEL_MRFLD_EMMC_0:
1131         case INTEL_MRFLD_EMMC_1:
1132                 slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
1133                                          MMC_CAP_8_BIT_DATA |
1134                                          MMC_CAP_1_8V_DDR;
1135                 break;
1136         case INTEL_MRFLD_SD:
1137                 slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1138                 break;
1139         case INTEL_MRFLD_SDIO:
1140                 /* Advertise 2.0v for compatibility with the SDIO card's OCR */
1141                 slot->host->ocr_mask = MMC_VDD_20_21 | MMC_VDD_165_195;
1142                 slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
1143                                          MMC_CAP_POWER_OFF_CARD;
1144                 break;
1145         default:
1146                 return -ENODEV;
1147         }
1148
1149         intel_mrfld_mmc_fix_up_power_slot(slot);
1150         return 0;
1151 }
1152
1153 static const struct sdhci_pci_fixes sdhci_intel_mrfld_mmc = {
1154         .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
1155         .quirks2        = SDHCI_QUIRK2_BROKEN_HS200 |
1156                         SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1157         .allow_runtime_pm = true,
1158         .probe_slot     = intel_mrfld_mmc_probe_slot,
1159 };
1160
1161 static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
1162 {
1163         u8 scratch;
1164         int ret;
1165
1166         ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
1167         if (ret)
1168                 return ret;
1169
1170         /*
1171          * Turn PMOS on [bit 0], set over current detection to 2.4 V
1172          * [bit 1:2] and enable over current debouncing [bit 6].
1173          */
1174         if (on)
1175                 scratch |= 0x47;
1176         else
1177                 scratch &= ~0x47;
1178
1179         return pci_write_config_byte(chip->pdev, 0xAE, scratch);
1180 }
1181
1182 static int jmicron_probe(struct sdhci_pci_chip *chip)
1183 {
1184         int ret;
1185         u16 mmcdev = 0;
1186
1187         if (chip->pdev->revision == 0) {
1188                 chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
1189                           SDHCI_QUIRK_32BIT_DMA_SIZE |
1190                           SDHCI_QUIRK_32BIT_ADMA_SIZE |
1191                           SDHCI_QUIRK_RESET_AFTER_REQUEST |
1192                           SDHCI_QUIRK_BROKEN_SMALL_PIO;
1193         }
1194
1195         /*
1196          * JMicron chips can have two interfaces to the same hardware
1197          * in order to work around limitations in Microsoft's driver.
1198          * We need to make sure we only bind to one of them.
1199          *
1200          * This code assumes two things:
1201          *
1202          * 1. The PCI code adds subfunctions in order.
1203          *
1204          * 2. The MMC interface has a lower subfunction number
1205          *    than the SD interface.
1206          */
1207         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD)
1208                 mmcdev = PCI_DEVICE_ID_JMICRON_JMB38X_MMC;
1209         else if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD)
1210                 mmcdev = PCI_DEVICE_ID_JMICRON_JMB388_ESD;
1211
1212         if (mmcdev) {
1213                 struct pci_dev *sd_dev;
1214
1215                 sd_dev = NULL;
1216                 while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
1217                                                 mmcdev, sd_dev)) != NULL) {
1218                         if ((PCI_SLOT(chip->pdev->devfn) ==
1219                                 PCI_SLOT(sd_dev->devfn)) &&
1220                                 (chip->pdev->bus == sd_dev->bus))
1221                                 break;
1222                 }
1223
1224                 if (sd_dev) {
1225                         pci_dev_put(sd_dev);
1226                         dev_info(&chip->pdev->dev, "Refusing to bind to "
1227                                 "secondary interface.\n");
1228                         return -ENODEV;
1229                 }
1230         }
1231
1232         /*
1233          * JMicron chips need a bit of a nudge to enable the power
1234          * output pins.
1235          */
1236         ret = jmicron_pmos(chip, 1);
1237         if (ret) {
1238                 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
1239                 return ret;
1240         }
1241
1242         /* quirk for unsable RO-detection on JM388 chips */
1243         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD ||
1244             chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1245                 chip->quirks |= SDHCI_QUIRK_UNSTABLE_RO_DETECT;
1246
1247         return 0;
1248 }
1249
1250 static void jmicron_enable_mmc(struct sdhci_host *host, int on)
1251 {
1252         u8 scratch;
1253
1254         scratch = readb(host->ioaddr + 0xC0);
1255
1256         if (on)
1257                 scratch |= 0x01;
1258         else
1259                 scratch &= ~0x01;
1260
1261         writeb(scratch, host->ioaddr + 0xC0);
1262 }
1263
1264 static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
1265 {
1266         if (slot->chip->pdev->revision == 0) {
1267                 u16 version;
1268
1269                 version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
1270                 version = (version & SDHCI_VENDOR_VER_MASK) >>
1271                         SDHCI_VENDOR_VER_SHIFT;
1272
1273                 /*
1274                  * Older versions of the chip have lots of nasty glitches
1275                  * in the ADMA engine. It's best just to avoid it
1276                  * completely.
1277                  */
1278                 if (version < 0xAC)
1279                         slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1280         }
1281
1282         /* JM388 MMC doesn't support 1.8V while SD supports it */
1283         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1284                 slot->host->ocr_avail_sd = MMC_VDD_32_33 | MMC_VDD_33_34 |
1285                         MMC_VDD_29_30 | MMC_VDD_30_31 |
1286                         MMC_VDD_165_195; /* allow 1.8V */
1287                 slot->host->ocr_avail_mmc = MMC_VDD_32_33 | MMC_VDD_33_34 |
1288                         MMC_VDD_29_30 | MMC_VDD_30_31; /* no 1.8V for MMC */
1289         }
1290
1291         /*
1292          * The secondary interface requires a bit set to get the
1293          * interrupts.
1294          */
1295         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1296             slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1297                 jmicron_enable_mmc(slot->host, 1);
1298
1299         slot->host->mmc->caps |= MMC_CAP_BUS_WIDTH_TEST;
1300
1301         return 0;
1302 }
1303
1304 static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
1305 {
1306         if (dead)
1307                 return;
1308
1309         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1310             slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1311                 jmicron_enable_mmc(slot->host, 0);
1312 }
1313
1314 #ifdef CONFIG_PM_SLEEP
1315 static int jmicron_suspend(struct sdhci_pci_chip *chip)
1316 {
1317         int i, ret;
1318
1319         ret = sdhci_pci_suspend_host(chip);
1320         if (ret)
1321                 return ret;
1322
1323         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1324             chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1325                 for (i = 0; i < chip->num_slots; i++)
1326                         jmicron_enable_mmc(chip->slots[i]->host, 0);
1327         }
1328
1329         return 0;
1330 }
1331
1332 static int jmicron_resume(struct sdhci_pci_chip *chip)
1333 {
1334         int ret, i;
1335
1336         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1337             chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1338                 for (i = 0; i < chip->num_slots; i++)
1339                         jmicron_enable_mmc(chip->slots[i]->host, 1);
1340         }
1341
1342         ret = jmicron_pmos(chip, 1);
1343         if (ret) {
1344                 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
1345                 return ret;
1346         }
1347
1348         return sdhci_pci_resume_host(chip);
1349 }
1350 #endif
1351
1352 static const struct sdhci_pci_fixes sdhci_jmicron = {
1353         .probe          = jmicron_probe,
1354
1355         .probe_slot     = jmicron_probe_slot,
1356         .remove_slot    = jmicron_remove_slot,
1357
1358 #ifdef CONFIG_PM_SLEEP
1359         .suspend        = jmicron_suspend,
1360         .resume         = jmicron_resume,
1361 #endif
1362 };
1363
1364 /* SysKonnect CardBus2SDIO extra registers */
1365 #define SYSKT_CTRL              0x200
1366 #define SYSKT_RDFIFO_STAT       0x204
1367 #define SYSKT_WRFIFO_STAT       0x208
1368 #define SYSKT_POWER_DATA        0x20c
1369 #define   SYSKT_POWER_330       0xef
1370 #define   SYSKT_POWER_300       0xf8
1371 #define   SYSKT_POWER_184       0xcc
1372 #define SYSKT_POWER_CMD         0x20d
1373 #define   SYSKT_POWER_START     (1 << 7)
1374 #define SYSKT_POWER_STATUS      0x20e
1375 #define   SYSKT_POWER_STATUS_OK (1 << 0)
1376 #define SYSKT_BOARD_REV         0x210
1377 #define SYSKT_CHIP_REV          0x211
1378 #define SYSKT_CONF_DATA         0x212
1379 #define   SYSKT_CONF_DATA_1V8   (1 << 2)
1380 #define   SYSKT_CONF_DATA_2V5   (1 << 1)
1381 #define   SYSKT_CONF_DATA_3V3   (1 << 0)
1382
1383 static int syskt_probe(struct sdhci_pci_chip *chip)
1384 {
1385         if ((chip->pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1386                 chip->pdev->class &= ~0x0000FF;
1387                 chip->pdev->class |= PCI_SDHCI_IFDMA;
1388         }
1389         return 0;
1390 }
1391
1392 static int syskt_probe_slot(struct sdhci_pci_slot *slot)
1393 {
1394         int tm, ps;
1395
1396         u8 board_rev = readb(slot->host->ioaddr + SYSKT_BOARD_REV);
1397         u8  chip_rev = readb(slot->host->ioaddr + SYSKT_CHIP_REV);
1398         dev_info(&slot->chip->pdev->dev, "SysKonnect CardBus2SDIO, "
1399                                          "board rev %d.%d, chip rev %d.%d\n",
1400                                          board_rev >> 4, board_rev & 0xf,
1401                                          chip_rev >> 4,  chip_rev & 0xf);
1402         if (chip_rev >= 0x20)
1403                 slot->host->quirks |= SDHCI_QUIRK_FORCE_DMA;
1404
1405         writeb(SYSKT_POWER_330, slot->host->ioaddr + SYSKT_POWER_DATA);
1406         writeb(SYSKT_POWER_START, slot->host->ioaddr + SYSKT_POWER_CMD);
1407         udelay(50);
1408         tm = 10;  /* Wait max 1 ms */
1409         do {
1410                 ps = readw(slot->host->ioaddr + SYSKT_POWER_STATUS);
1411                 if (ps & SYSKT_POWER_STATUS_OK)
1412                         break;
1413                 udelay(100);
1414         } while (--tm);
1415         if (!tm) {
1416                 dev_err(&slot->chip->pdev->dev,
1417                         "power regulator never stabilized");
1418                 writeb(0, slot->host->ioaddr + SYSKT_POWER_CMD);
1419                 return -ENODEV;
1420         }
1421
1422         return 0;
1423 }
1424
1425 static const struct sdhci_pci_fixes sdhci_syskt = {
1426         .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER,
1427         .probe          = syskt_probe,
1428         .probe_slot     = syskt_probe_slot,
1429 };
1430
1431 static int via_probe(struct sdhci_pci_chip *chip)
1432 {
1433         if (chip->pdev->revision == 0x10)
1434                 chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
1435
1436         return 0;
1437 }
1438
1439 static const struct sdhci_pci_fixes sdhci_via = {
1440         .probe          = via_probe,
1441 };
1442
1443 static int rtsx_probe_slot(struct sdhci_pci_slot *slot)
1444 {
1445         slot->host->mmc->caps2 |= MMC_CAP2_HS200;
1446         return 0;
1447 }
1448
1449 static const struct sdhci_pci_fixes sdhci_rtsx = {
1450         .quirks2        = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1451                         SDHCI_QUIRK2_BROKEN_64_BIT_DMA |
1452                         SDHCI_QUIRK2_BROKEN_DDR50,
1453         .probe_slot     = rtsx_probe_slot,
1454 };
1455
1456 /*AMD chipset generation*/
1457 enum amd_chipset_gen {
1458         AMD_CHIPSET_BEFORE_ML,
1459         AMD_CHIPSET_CZ,
1460         AMD_CHIPSET_NL,
1461         AMD_CHIPSET_UNKNOWN,
1462 };
1463
1464 /* AMD registers */
1465 #define AMD_SD_AUTO_PATTERN             0xB8
1466 #define AMD_MSLEEP_DURATION             4
1467 #define AMD_SD_MISC_CONTROL             0xD0
1468 #define AMD_MAX_TUNE_VALUE              0x0B
1469 #define AMD_AUTO_TUNE_SEL               0x10800
1470 #define AMD_FIFO_PTR                    0x30
1471 #define AMD_BIT_MASK                    0x1F
1472
1473 static void amd_tuning_reset(struct sdhci_host *host)
1474 {
1475         unsigned int val;
1476
1477         val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1478         val |= SDHCI_CTRL_PRESET_VAL_ENABLE | SDHCI_CTRL_EXEC_TUNING;
1479         sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
1480
1481         val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1482         val &= ~SDHCI_CTRL_EXEC_TUNING;
1483         sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
1484 }
1485
1486 static void amd_config_tuning_phase(struct pci_dev *pdev, u8 phase)
1487 {
1488         unsigned int val;
1489
1490         pci_read_config_dword(pdev, AMD_SD_AUTO_PATTERN, &val);
1491         val &= ~AMD_BIT_MASK;
1492         val |= (AMD_AUTO_TUNE_SEL | (phase << 1));
1493         pci_write_config_dword(pdev, AMD_SD_AUTO_PATTERN, val);
1494 }
1495
1496 static void amd_enable_manual_tuning(struct pci_dev *pdev)
1497 {
1498         unsigned int val;
1499
1500         pci_read_config_dword(pdev, AMD_SD_MISC_CONTROL, &val);
1501         val |= AMD_FIFO_PTR;
1502         pci_write_config_dword(pdev, AMD_SD_MISC_CONTROL, val);
1503 }
1504
1505 static int amd_execute_tuning_hs200(struct sdhci_host *host, u32 opcode)
1506 {
1507         struct sdhci_pci_slot *slot = sdhci_priv(host);
1508         struct pci_dev *pdev = slot->chip->pdev;
1509         u8 valid_win = 0;
1510         u8 valid_win_max = 0;
1511         u8 valid_win_end = 0;
1512         u8 ctrl, tune_around;
1513
1514         amd_tuning_reset(host);
1515
1516         for (tune_around = 0; tune_around < 12; tune_around++) {
1517                 amd_config_tuning_phase(pdev, tune_around);
1518
1519                 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
1520                         valid_win = 0;
1521                         msleep(AMD_MSLEEP_DURATION);
1522                         ctrl = SDHCI_RESET_CMD | SDHCI_RESET_DATA;
1523                         sdhci_writeb(host, ctrl, SDHCI_SOFTWARE_RESET);
1524                 } else if (++valid_win > valid_win_max) {
1525                         valid_win_max = valid_win;
1526                         valid_win_end = tune_around;
1527                 }
1528         }
1529
1530         if (!valid_win_max) {
1531                 dev_err(&pdev->dev, "no tuning point found\n");
1532                 return -EIO;
1533         }
1534
1535         amd_config_tuning_phase(pdev, valid_win_end - valid_win_max / 2);
1536
1537         amd_enable_manual_tuning(pdev);
1538
1539         host->mmc->retune_period = 0;
1540
1541         return 0;
1542 }
1543
1544 static int amd_execute_tuning(struct mmc_host *mmc, u32 opcode)
1545 {
1546         struct sdhci_host *host = mmc_priv(mmc);
1547
1548         /* AMD requires custom HS200 tuning */
1549         if (host->timing == MMC_TIMING_MMC_HS200)
1550                 return amd_execute_tuning_hs200(host, opcode);
1551
1552         /* Otherwise perform standard SDHCI tuning */
1553         return sdhci_execute_tuning(mmc, opcode);
1554 }
1555
1556 static int amd_probe_slot(struct sdhci_pci_slot *slot)
1557 {
1558         struct mmc_host_ops *ops = &slot->host->mmc_host_ops;
1559
1560         ops->execute_tuning = amd_execute_tuning;
1561
1562         return 0;
1563 }
1564
1565 static int amd_probe(struct sdhci_pci_chip *chip)
1566 {
1567         struct pci_dev  *smbus_dev;
1568         enum amd_chipset_gen gen;
1569
1570         smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
1571                         PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
1572         if (smbus_dev) {
1573                 gen = AMD_CHIPSET_BEFORE_ML;
1574         } else {
1575                 smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
1576                                 PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
1577                 if (smbus_dev) {
1578                         if (smbus_dev->revision < 0x51)
1579                                 gen = AMD_CHIPSET_CZ;
1580                         else
1581                                 gen = AMD_CHIPSET_NL;
1582                 } else {
1583                         gen = AMD_CHIPSET_UNKNOWN;
1584                 }
1585         }
1586
1587         if (gen == AMD_CHIPSET_BEFORE_ML || gen == AMD_CHIPSET_CZ)
1588                 chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
1589
1590         return 0;
1591 }
1592
1593 static const struct sdhci_ops amd_sdhci_pci_ops = {
1594         .set_clock                      = sdhci_set_clock,
1595         .enable_dma                     = sdhci_pci_enable_dma,
1596         .set_bus_width                  = sdhci_set_bus_width,
1597         .reset                          = sdhci_reset,
1598         .set_uhs_signaling              = sdhci_set_uhs_signaling,
1599 };
1600
1601 static const struct sdhci_pci_fixes sdhci_amd = {
1602         .probe          = amd_probe,
1603         .ops            = &amd_sdhci_pci_ops,
1604         .probe_slot     = amd_probe_slot,
1605 };
1606
1607 static const struct pci_device_id pci_ids[] = {
1608         SDHCI_PCI_DEVICE(RICOH, R5C822,  ricoh),
1609         SDHCI_PCI_DEVICE(RICOH, R5C843,  ricoh_mmc),
1610         SDHCI_PCI_DEVICE(RICOH, R5CE822, ricoh_mmc),
1611         SDHCI_PCI_DEVICE(RICOH, R5CE823, ricoh_mmc),
1612         SDHCI_PCI_DEVICE(ENE, CB712_SD,   ene_712),
1613         SDHCI_PCI_DEVICE(ENE, CB712_SD_2, ene_712),
1614         SDHCI_PCI_DEVICE(ENE, CB714_SD,   ene_714),
1615         SDHCI_PCI_DEVICE(ENE, CB714_SD_2, ene_714),
1616         SDHCI_PCI_DEVICE(MARVELL, 88ALP01_SD, cafe),
1617         SDHCI_PCI_DEVICE(JMICRON, JMB38X_SD,  jmicron),
1618         SDHCI_PCI_DEVICE(JMICRON, JMB38X_MMC, jmicron),
1619         SDHCI_PCI_DEVICE(JMICRON, JMB388_SD,  jmicron),
1620         SDHCI_PCI_DEVICE(JMICRON, JMB388_ESD, jmicron),
1621         SDHCI_PCI_DEVICE(SYSKONNECT, 8000, syskt),
1622         SDHCI_PCI_DEVICE(VIA, 95D0, via),
1623         SDHCI_PCI_DEVICE(REALTEK, 5250, rtsx),
1624         SDHCI_PCI_DEVICE(INTEL, QRK_SD,    intel_qrk),
1625         SDHCI_PCI_DEVICE(INTEL, MRST_SD0,  intel_mrst_hc0),
1626         SDHCI_PCI_DEVICE(INTEL, MRST_SD1,  intel_mrst_hc1_hc2),
1627         SDHCI_PCI_DEVICE(INTEL, MRST_SD2,  intel_mrst_hc1_hc2),
1628         SDHCI_PCI_DEVICE(INTEL, MFD_SD,    intel_mfd_sd),
1629         SDHCI_PCI_DEVICE(INTEL, MFD_SDIO1, intel_mfd_sdio),
1630         SDHCI_PCI_DEVICE(INTEL, MFD_SDIO2, intel_mfd_sdio),
1631         SDHCI_PCI_DEVICE(INTEL, MFD_EMMC0, intel_mfd_emmc),
1632         SDHCI_PCI_DEVICE(INTEL, MFD_EMMC1, intel_mfd_emmc),
1633         SDHCI_PCI_DEVICE(INTEL, PCH_SDIO0, intel_pch_sdio),
1634         SDHCI_PCI_DEVICE(INTEL, PCH_SDIO1, intel_pch_sdio),
1635         SDHCI_PCI_DEVICE(INTEL, BYT_EMMC,  intel_byt_emmc),
1636         SDHCI_PCI_SUBDEVICE(INTEL, BYT_SDIO, NI, 7884, ni_byt_sdio),
1637         SDHCI_PCI_DEVICE(INTEL, BYT_SDIO,  intel_byt_sdio),
1638         SDHCI_PCI_DEVICE(INTEL, BYT_SD,    intel_byt_sd),
1639         SDHCI_PCI_DEVICE(INTEL, BYT_EMMC2, intel_byt_emmc),
1640         SDHCI_PCI_DEVICE(INTEL, BSW_EMMC,  intel_byt_emmc),
1641         SDHCI_PCI_DEVICE(INTEL, BSW_SDIO,  intel_byt_sdio),
1642         SDHCI_PCI_DEVICE(INTEL, BSW_SD,    intel_byt_sd),
1643         SDHCI_PCI_DEVICE(INTEL, CLV_SDIO0, intel_mfd_sd),
1644         SDHCI_PCI_DEVICE(INTEL, CLV_SDIO1, intel_mfd_sdio),
1645         SDHCI_PCI_DEVICE(INTEL, CLV_SDIO2, intel_mfd_sdio),
1646         SDHCI_PCI_DEVICE(INTEL, CLV_EMMC0, intel_mfd_emmc),
1647         SDHCI_PCI_DEVICE(INTEL, CLV_EMMC1, intel_mfd_emmc),
1648         SDHCI_PCI_DEVICE(INTEL, MRFLD_MMC, intel_mrfld_mmc),
1649         SDHCI_PCI_DEVICE(INTEL, SPT_EMMC,  intel_byt_emmc),
1650         SDHCI_PCI_DEVICE(INTEL, SPT_SDIO,  intel_byt_sdio),
1651         SDHCI_PCI_DEVICE(INTEL, SPT_SD,    intel_byt_sd),
1652         SDHCI_PCI_DEVICE(INTEL, DNV_EMMC,  intel_byt_emmc),
1653         SDHCI_PCI_DEVICE(INTEL, CDF_EMMC,  intel_glk_emmc),
1654         SDHCI_PCI_DEVICE(INTEL, BXT_EMMC,  intel_byt_emmc),
1655         SDHCI_PCI_DEVICE(INTEL, BXT_SDIO,  intel_byt_sdio),
1656         SDHCI_PCI_DEVICE(INTEL, BXT_SD,    intel_byt_sd),
1657         SDHCI_PCI_DEVICE(INTEL, BXTM_EMMC, intel_byt_emmc),
1658         SDHCI_PCI_DEVICE(INTEL, BXTM_SDIO, intel_byt_sdio),
1659         SDHCI_PCI_DEVICE(INTEL, BXTM_SD,   intel_byt_sd),
1660         SDHCI_PCI_DEVICE(INTEL, APL_EMMC,  intel_byt_emmc),
1661         SDHCI_PCI_DEVICE(INTEL, APL_SDIO,  intel_byt_sdio),
1662         SDHCI_PCI_DEVICE(INTEL, APL_SD,    intel_byt_sd),
1663         SDHCI_PCI_DEVICE(INTEL, GLK_EMMC,  intel_glk_emmc),
1664         SDHCI_PCI_DEVICE(INTEL, GLK_SDIO,  intel_byt_sdio),
1665         SDHCI_PCI_DEVICE(INTEL, GLK_SD,    intel_byt_sd),
1666         SDHCI_PCI_DEVICE(INTEL, CNP_EMMC,  intel_glk_emmc),
1667         SDHCI_PCI_DEVICE(INTEL, CNP_SD,    intel_byt_sd),
1668         SDHCI_PCI_DEVICE(INTEL, CNPH_SD,   intel_byt_sd),
1669         SDHCI_PCI_DEVICE(INTEL, ICP_EMMC,  intel_glk_emmc),
1670         SDHCI_PCI_DEVICE(INTEL, ICP_SD,    intel_byt_sd),
1671         SDHCI_PCI_DEVICE(INTEL, EHL_EMMC,  intel_glk_emmc),
1672         SDHCI_PCI_DEVICE(INTEL, EHL_SD,    intel_byt_sd),
1673         SDHCI_PCI_DEVICE(INTEL, CML_EMMC,  intel_glk_emmc),
1674         SDHCI_PCI_DEVICE(INTEL, CML_SD,    intel_byt_sd),
1675         SDHCI_PCI_DEVICE(O2, 8120,     o2),
1676         SDHCI_PCI_DEVICE(O2, 8220,     o2),
1677         SDHCI_PCI_DEVICE(O2, 8221,     o2),
1678         SDHCI_PCI_DEVICE(O2, 8320,     o2),
1679         SDHCI_PCI_DEVICE(O2, 8321,     o2),
1680         SDHCI_PCI_DEVICE(O2, FUJIN2,   o2),
1681         SDHCI_PCI_DEVICE(O2, SDS0,     o2),
1682         SDHCI_PCI_DEVICE(O2, SDS1,     o2),
1683         SDHCI_PCI_DEVICE(O2, SEABIRD0, o2),
1684         SDHCI_PCI_DEVICE(O2, SEABIRD1, o2),
1685         SDHCI_PCI_DEVICE(ARASAN, PHY_EMMC, arasan),
1686         SDHCI_PCI_DEVICE(SYNOPSYS, DWC_MSHC, snps),
1687         SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd),
1688         /* Generic SD host controller */
1689         {PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)},
1690         { /* end: all zeroes */ },
1691 };
1692
1693 MODULE_DEVICE_TABLE(pci, pci_ids);
1694
1695 /*****************************************************************************\
1696  *                                                                           *
1697  * SDHCI core callbacks                                                      *
1698  *                                                                           *
1699 \*****************************************************************************/
1700
1701 int sdhci_pci_enable_dma(struct sdhci_host *host)
1702 {
1703         struct sdhci_pci_slot *slot;
1704         struct pci_dev *pdev;
1705
1706         slot = sdhci_priv(host);
1707         pdev = slot->chip->pdev;
1708
1709         if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
1710                 ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
1711                 (host->flags & SDHCI_USE_SDMA)) {
1712                 dev_warn(&pdev->dev, "Will use DMA mode even though HW "
1713                         "doesn't fully claim to support it.\n");
1714         }
1715
1716         pci_set_master(pdev);
1717
1718         return 0;
1719 }
1720
1721 static void sdhci_pci_gpio_hw_reset(struct sdhci_host *host)
1722 {
1723         struct sdhci_pci_slot *slot = sdhci_priv(host);
1724         int rst_n_gpio = slot->rst_n_gpio;
1725
1726         if (!gpio_is_valid(rst_n_gpio))
1727                 return;
1728         gpio_set_value_cansleep(rst_n_gpio, 0);
1729         /* For eMMC, minimum is 1us but give it 10us for good measure */
1730         udelay(10);
1731         gpio_set_value_cansleep(rst_n_gpio, 1);
1732         /* For eMMC, minimum is 200us but give it 300us for good measure */
1733         usleep_range(300, 1000);
1734 }
1735
1736 static void sdhci_pci_hw_reset(struct sdhci_host *host)
1737 {
1738         struct sdhci_pci_slot *slot = sdhci_priv(host);
1739
1740         if (slot->hw_reset)
1741                 slot->hw_reset(host);
1742 }
1743
1744 static const struct sdhci_ops sdhci_pci_ops = {
1745         .set_clock      = sdhci_set_clock,
1746         .enable_dma     = sdhci_pci_enable_dma,
1747         .set_bus_width  = sdhci_set_bus_width,
1748         .reset          = sdhci_reset,
1749         .set_uhs_signaling = sdhci_set_uhs_signaling,
1750         .hw_reset               = sdhci_pci_hw_reset,
1751 };
1752
1753 /*****************************************************************************\
1754  *                                                                           *
1755  * Suspend/resume                                                            *
1756  *                                                                           *
1757 \*****************************************************************************/
1758
1759 #ifdef CONFIG_PM_SLEEP
1760 static int sdhci_pci_suspend(struct device *dev)
1761 {
1762         struct pci_dev *pdev = to_pci_dev(dev);
1763         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1764
1765         if (!chip)
1766                 return 0;
1767
1768         if (chip->fixes && chip->fixes->suspend)
1769                 return chip->fixes->suspend(chip);
1770
1771         return sdhci_pci_suspend_host(chip);
1772 }
1773
1774 static int sdhci_pci_resume(struct device *dev)
1775 {
1776         struct pci_dev *pdev = to_pci_dev(dev);
1777         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1778
1779         if (!chip)
1780                 return 0;
1781
1782         if (chip->fixes && chip->fixes->resume)
1783                 return chip->fixes->resume(chip);
1784
1785         return sdhci_pci_resume_host(chip);
1786 }
1787 #endif
1788
1789 #ifdef CONFIG_PM
1790 static int sdhci_pci_runtime_suspend(struct device *dev)
1791 {
1792         struct pci_dev *pdev = to_pci_dev(dev);
1793         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1794
1795         if (!chip)
1796                 return 0;
1797
1798         if (chip->fixes && chip->fixes->runtime_suspend)
1799                 return chip->fixes->runtime_suspend(chip);
1800
1801         return sdhci_pci_runtime_suspend_host(chip);
1802 }
1803
1804 static int sdhci_pci_runtime_resume(struct device *dev)
1805 {
1806         struct pci_dev *pdev = to_pci_dev(dev);
1807         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
1808
1809         if (!chip)
1810                 return 0;
1811
1812         if (chip->fixes && chip->fixes->runtime_resume)
1813                 return chip->fixes->runtime_resume(chip);
1814
1815         return sdhci_pci_runtime_resume_host(chip);
1816 }
1817 #endif
1818
1819 static const struct dev_pm_ops sdhci_pci_pm_ops = {
1820         SET_SYSTEM_SLEEP_PM_OPS(sdhci_pci_suspend, sdhci_pci_resume)
1821         SET_RUNTIME_PM_OPS(sdhci_pci_runtime_suspend,
1822                         sdhci_pci_runtime_resume, NULL)
1823 };
1824
1825 /*****************************************************************************\
1826  *                                                                           *
1827  * Device probing/removal                                                    *
1828  *                                                                           *
1829 \*****************************************************************************/
1830
1831 static struct sdhci_pci_slot *sdhci_pci_probe_slot(
1832         struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
1833         int slotno)
1834 {
1835         struct sdhci_pci_slot *slot;
1836         struct sdhci_host *host;
1837         int ret, bar = first_bar + slotno;
1838         size_t priv_size = chip->fixes ? chip->fixes->priv_size : 0;
1839
1840         if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
1841                 dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
1842                 return ERR_PTR(-ENODEV);
1843         }
1844
1845         if (pci_resource_len(pdev, bar) < 0x100) {
1846                 dev_err(&pdev->dev, "Invalid iomem size. You may "
1847                         "experience problems.\n");
1848         }
1849
1850         if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1851                 dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
1852                 return ERR_PTR(-ENODEV);
1853         }
1854
1855         if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
1856                 dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
1857                 return ERR_PTR(-ENODEV);
1858         }
1859
1860         host = sdhci_alloc_host(&pdev->dev, sizeof(*slot) + priv_size);
1861         if (IS_ERR(host)) {
1862                 dev_err(&pdev->dev, "cannot allocate host\n");
1863                 return ERR_CAST(host);
1864         }
1865
1866         slot = sdhci_priv(host);
1867
1868         slot->chip = chip;
1869         slot->host = host;
1870         slot->rst_n_gpio = -EINVAL;
1871         slot->cd_gpio = -EINVAL;
1872         slot->cd_idx = -1;
1873
1874         /* Retrieve platform data if there is any */
1875         if (*sdhci_pci_get_data)
1876                 slot->data = sdhci_pci_get_data(pdev, slotno);
1877
1878         if (slot->data) {
1879                 if (slot->data->setup) {
1880                         ret = slot->data->setup(slot->data);
1881                         if (ret) {
1882                                 dev_err(&pdev->dev, "platform setup failed\n");
1883                                 goto free;
1884                         }
1885                 }
1886                 slot->rst_n_gpio = slot->data->rst_n_gpio;
1887                 slot->cd_gpio = slot->data->cd_gpio;
1888         }
1889
1890         host->hw_name = "PCI";
1891         host->ops = chip->fixes && chip->fixes->ops ?
1892                     chip->fixes->ops :
1893                     &sdhci_pci_ops;
1894         host->quirks = chip->quirks;
1895         host->quirks2 = chip->quirks2;
1896
1897         host->irq = pdev->irq;
1898
1899         ret = pcim_iomap_regions(pdev, BIT(bar), mmc_hostname(host->mmc));
1900         if (ret) {
1901                 dev_err(&pdev->dev, "cannot request region\n");
1902                 goto cleanup;
1903         }
1904
1905         host->ioaddr = pcim_iomap_table(pdev)[bar];
1906
1907         if (chip->fixes && chip->fixes->probe_slot) {
1908                 ret = chip->fixes->probe_slot(slot);
1909                 if (ret)
1910                         goto cleanup;
1911         }
1912
1913         if (gpio_is_valid(slot->rst_n_gpio)) {
1914                 if (!devm_gpio_request(&pdev->dev, slot->rst_n_gpio, "eMMC_reset")) {
1915                         gpio_direction_output(slot->rst_n_gpio, 1);
1916                         slot->host->mmc->caps |= MMC_CAP_HW_RESET;
1917                         slot->hw_reset = sdhci_pci_gpio_hw_reset;
1918                 } else {
1919                         dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
1920                         slot->rst_n_gpio = -EINVAL;
1921                 }
1922         }
1923
1924         host->mmc->pm_caps = MMC_PM_KEEP_POWER;
1925         host->mmc->slotno = slotno;
1926         host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
1927
1928         if (device_can_wakeup(&pdev->dev))
1929                 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
1930
1931         if (host->mmc->caps & MMC_CAP_CD_WAKE)
1932                 device_init_wakeup(&pdev->dev, true);
1933
1934         if (slot->cd_idx >= 0) {
1935                 ret = mmc_gpiod_request_cd(host->mmc, "cd", slot->cd_idx,
1936                                            slot->cd_override_level, 0, NULL);
1937                 if (ret && ret != -EPROBE_DEFER)
1938                         ret = mmc_gpiod_request_cd(host->mmc, NULL,
1939                                                    slot->cd_idx,
1940                                                    slot->cd_override_level,
1941                                                    0, NULL);
1942                 if (ret == -EPROBE_DEFER)
1943                         goto remove;
1944
1945                 if (ret) {
1946                         dev_warn(&pdev->dev, "failed to setup card detect gpio\n");
1947                         slot->cd_idx = -1;
1948                 }
1949         }
1950
1951         if (chip->fixes && chip->fixes->add_host)
1952                 ret = chip->fixes->add_host(slot);
1953         else
1954                 ret = sdhci_add_host(host);
1955         if (ret)
1956                 goto remove;
1957
1958         sdhci_pci_add_own_cd(slot);
1959
1960         /*
1961          * Check if the chip needs a separate GPIO for card detect to wake up
1962          * from runtime suspend.  If it is not there, don't allow runtime PM.
1963          * Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure.
1964          */
1965         if (chip->fixes && chip->fixes->own_cd_for_runtime_pm &&
1966             !gpio_is_valid(slot->cd_gpio) && slot->cd_idx < 0)
1967                 chip->allow_runtime_pm = false;
1968
1969         return slot;
1970
1971 remove:
1972         if (chip->fixes && chip->fixes->remove_slot)
1973                 chip->fixes->remove_slot(slot, 0);
1974
1975 cleanup:
1976         if (slot->data && slot->data->cleanup)
1977                 slot->data->cleanup(slot->data);
1978
1979 free:
1980         sdhci_free_host(host);
1981
1982         return ERR_PTR(ret);
1983 }
1984
1985 static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
1986 {
1987         int dead;
1988         u32 scratch;
1989
1990         sdhci_pci_remove_own_cd(slot);
1991
1992         dead = 0;
1993         scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
1994         if (scratch == (u32)-1)
1995                 dead = 1;
1996
1997         sdhci_remove_host(slot->host, dead);
1998
1999         if (slot->chip->fixes && slot->chip->fixes->remove_slot)
2000                 slot->chip->fixes->remove_slot(slot, dead);
2001
2002         if (slot->data && slot->data->cleanup)
2003                 slot->data->cleanup(slot->data);
2004
2005         sdhci_free_host(slot->host);
2006 }
2007
2008 static void sdhci_pci_runtime_pm_allow(struct device *dev)
2009 {
2010         pm_suspend_ignore_children(dev, 1);
2011         pm_runtime_set_autosuspend_delay(dev, 50);
2012         pm_runtime_use_autosuspend(dev);
2013         pm_runtime_allow(dev);
2014         /* Stay active until mmc core scans for a card */
2015         pm_runtime_put_noidle(dev);
2016 }
2017
2018 static void sdhci_pci_runtime_pm_forbid(struct device *dev)
2019 {
2020         pm_runtime_forbid(dev);
2021         pm_runtime_get_noresume(dev);
2022 }
2023
2024 static int sdhci_pci_probe(struct pci_dev *pdev,
2025                                      const struct pci_device_id *ent)
2026 {
2027         struct sdhci_pci_chip *chip;
2028         struct sdhci_pci_slot *slot;
2029
2030         u8 slots, first_bar;
2031         int ret, i;
2032
2033         BUG_ON(pdev == NULL);
2034         BUG_ON(ent == NULL);
2035
2036         dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
2037                  (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
2038
2039         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
2040         if (ret)
2041                 return ret;
2042
2043         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
2044         dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
2045
2046         BUG_ON(slots > MAX_SLOTS);
2047
2048         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
2049         if (ret)
2050                 return ret;
2051
2052         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
2053
2054         if (first_bar > 5) {
2055                 dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
2056                 return -ENODEV;
2057         }
2058
2059         ret = pcim_enable_device(pdev);
2060         if (ret)
2061                 return ret;
2062
2063         chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
2064         if (!chip)
2065                 return -ENOMEM;
2066
2067         chip->pdev = pdev;
2068         chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
2069         if (chip->fixes) {
2070                 chip->quirks = chip->fixes->quirks;
2071                 chip->quirks2 = chip->fixes->quirks2;
2072                 chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
2073         }
2074         chip->num_slots = slots;
2075         chip->pm_retune = true;
2076         chip->rpm_retune = true;
2077
2078         pci_set_drvdata(pdev, chip);
2079
2080         if (chip->fixes && chip->fixes->probe) {
2081                 ret = chip->fixes->probe(chip);
2082                 if (ret)
2083                         return ret;
2084         }
2085
2086         slots = chip->num_slots;        /* Quirk may have changed this */
2087
2088         for (i = 0; i < slots; i++) {
2089                 slot = sdhci_pci_probe_slot(pdev, chip, first_bar, i);
2090                 if (IS_ERR(slot)) {
2091                         for (i--; i >= 0; i--)
2092                                 sdhci_pci_remove_slot(chip->slots[i]);
2093                         return PTR_ERR(slot);
2094                 }
2095
2096                 chip->slots[i] = slot;
2097         }
2098
2099         if (chip->allow_runtime_pm)
2100                 sdhci_pci_runtime_pm_allow(&pdev->dev);
2101
2102         return 0;
2103 }
2104
2105 static void sdhci_pci_remove(struct pci_dev *pdev)
2106 {
2107         int i;
2108         struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
2109
2110         if (chip->allow_runtime_pm)
2111                 sdhci_pci_runtime_pm_forbid(&pdev->dev);
2112
2113         for (i = 0; i < chip->num_slots; i++)
2114                 sdhci_pci_remove_slot(chip->slots[i]);
2115 }
2116
2117 static struct pci_driver sdhci_driver = {
2118         .name =         "sdhci-pci",
2119         .id_table =     pci_ids,
2120         .probe =        sdhci_pci_probe,
2121         .remove =       sdhci_pci_remove,
2122         .driver =       {
2123                 .pm =   &sdhci_pci_pm_ops
2124         },
2125 };
2126
2127 module_pci_driver(sdhci_driver);
2128
2129 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
2130 MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
2131 MODULE_LICENSE("GPL");