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/scatterlist.h>
21 #include <linux/io.h>
22 #include <linux/iopoll.h>
23 #include <linux/gpio.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/pm_qos.h>
26 #include <linux/debugfs.h>
27 #include <linux/acpi.h>
28 #include <linux/dmi.h>
29 
30 #include <linux/mmc/host.h>
31 #include <linux/mmc/mmc.h>
32 #include <linux/mmc/slot-gpio.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-cqhci.h"
42 #include "sdhci-pci.h"
43 
44 static void sdhci_pci_hw_reset(struct sdhci_host *host);
45 
46 #ifdef CONFIG_PM_SLEEP
sdhci_pci_init_wakeup(struct sdhci_pci_chip * chip)47 static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip)
48 {
49 	mmc_pm_flag_t pm_flags = 0;
50 	bool cap_cd_wake = false;
51 	int i;
52 
53 	for (i = 0; i < chip->num_slots; i++) {
54 		struct sdhci_pci_slot *slot = chip->slots[i];
55 
56 		if (slot) {
57 			pm_flags |= slot->host->mmc->pm_flags;
58 			if (slot->host->mmc->caps & MMC_CAP_CD_WAKE)
59 				cap_cd_wake = true;
60 		}
61 	}
62 
63 	if ((pm_flags & MMC_PM_KEEP_POWER) && (pm_flags & MMC_PM_WAKE_SDIO_IRQ))
64 		return device_wakeup_enable(&chip->pdev->dev);
65 	else if (!cap_cd_wake)
66 		return device_wakeup_disable(&chip->pdev->dev);
67 
68 	return 0;
69 }
70 
sdhci_pci_suspend_host(struct sdhci_pci_chip * chip)71 static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
72 {
73 	int i, ret;
74 
75 	sdhci_pci_init_wakeup(chip);
76 
77 	for (i = 0; i < chip->num_slots; i++) {
78 		struct sdhci_pci_slot *slot = chip->slots[i];
79 		struct sdhci_host *host;
80 
81 		if (!slot)
82 			continue;
83 
84 		host = slot->host;
85 
86 		if (chip->pm_retune && host->tuning_mode != SDHCI_TUNING_MODE_3)
87 			mmc_retune_needed(host->mmc);
88 
89 		ret = sdhci_suspend_host(host);
90 		if (ret)
91 			goto err_pci_suspend;
92 
93 		if (device_may_wakeup(&chip->pdev->dev))
94 			mmc_gpio_set_cd_wake(host->mmc, true);
95 	}
96 
97 	return 0;
98 
99 err_pci_suspend:
100 	while (--i >= 0)
101 		sdhci_resume_host(chip->slots[i]->host);
102 	return ret;
103 }
104 
sdhci_pci_resume_host(struct sdhci_pci_chip * chip)105 int sdhci_pci_resume_host(struct sdhci_pci_chip *chip)
106 {
107 	struct sdhci_pci_slot *slot;
108 	int i, ret;
109 
110 	for (i = 0; i < chip->num_slots; i++) {
111 		slot = chip->slots[i];
112 		if (!slot)
113 			continue;
114 
115 		ret = sdhci_resume_host(slot->host);
116 		if (ret)
117 			return ret;
118 
119 		mmc_gpio_set_cd_wake(slot->host->mmc, false);
120 	}
121 
122 	return 0;
123 }
124 
sdhci_cqhci_suspend(struct sdhci_pci_chip * chip)125 static int sdhci_cqhci_suspend(struct sdhci_pci_chip *chip)
126 {
127 	int ret;
128 
129 	ret = cqhci_suspend(chip->slots[0]->host->mmc);
130 	if (ret)
131 		return ret;
132 
133 	return sdhci_pci_suspend_host(chip);
134 }
135 
sdhci_cqhci_resume(struct sdhci_pci_chip * chip)136 static int sdhci_cqhci_resume(struct sdhci_pci_chip *chip)
137 {
138 	int ret;
139 
140 	ret = sdhci_pci_resume_host(chip);
141 	if (ret)
142 		return ret;
143 
144 	return cqhci_resume(chip->slots[0]->host->mmc);
145 }
146 #endif
147 
148 #ifdef CONFIG_PM
sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip * chip)149 static int sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip *chip)
150 {
151 	struct sdhci_pci_slot *slot;
152 	struct sdhci_host *host;
153 	int i, ret;
154 
155 	for (i = 0; i < chip->num_slots; i++) {
156 		slot = chip->slots[i];
157 		if (!slot)
158 			continue;
159 
160 		host = slot->host;
161 
162 		ret = sdhci_runtime_suspend_host(host);
163 		if (ret)
164 			goto err_pci_runtime_suspend;
165 
166 		if (chip->rpm_retune &&
167 		    host->tuning_mode != SDHCI_TUNING_MODE_3)
168 			mmc_retune_needed(host->mmc);
169 	}
170 
171 	return 0;
172 
173 err_pci_runtime_suspend:
174 	while (--i >= 0)
175 		sdhci_runtime_resume_host(chip->slots[i]->host, 0);
176 	return ret;
177 }
178 
sdhci_pci_runtime_resume_host(struct sdhci_pci_chip * chip)179 static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip)
180 {
181 	struct sdhci_pci_slot *slot;
182 	int i, ret;
183 
184 	for (i = 0; i < chip->num_slots; i++) {
185 		slot = chip->slots[i];
186 		if (!slot)
187 			continue;
188 
189 		ret = sdhci_runtime_resume_host(slot->host, 0);
190 		if (ret)
191 			return ret;
192 	}
193 
194 	return 0;
195 }
196 
sdhci_cqhci_runtime_suspend(struct sdhci_pci_chip * chip)197 static int sdhci_cqhci_runtime_suspend(struct sdhci_pci_chip *chip)
198 {
199 	int ret;
200 
201 	ret = cqhci_suspend(chip->slots[0]->host->mmc);
202 	if (ret)
203 		return ret;
204 
205 	return sdhci_pci_runtime_suspend_host(chip);
206 }
207 
sdhci_cqhci_runtime_resume(struct sdhci_pci_chip * chip)208 static int sdhci_cqhci_runtime_resume(struct sdhci_pci_chip *chip)
209 {
210 	int ret;
211 
212 	ret = sdhci_pci_runtime_resume_host(chip);
213 	if (ret)
214 		return ret;
215 
216 	return cqhci_resume(chip->slots[0]->host->mmc);
217 }
218 #endif
219 
sdhci_cqhci_irq(struct sdhci_host * host,u32 intmask)220 static u32 sdhci_cqhci_irq(struct sdhci_host *host, u32 intmask)
221 {
222 	int cmd_error = 0;
223 	int data_error = 0;
224 
225 	if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
226 		return intmask;
227 
228 	cqhci_irq(host->mmc, intmask, cmd_error, data_error);
229 
230 	return 0;
231 }
232 
sdhci_pci_dumpregs(struct mmc_host * mmc)233 static void sdhci_pci_dumpregs(struct mmc_host *mmc)
234 {
235 	sdhci_dumpregs(mmc_priv(mmc));
236 }
237 
238 /*****************************************************************************\
239  *                                                                           *
240  * Hardware specific quirk handling                                          *
241  *                                                                           *
242 \*****************************************************************************/
243 
ricoh_probe(struct sdhci_pci_chip * chip)244 static int ricoh_probe(struct sdhci_pci_chip *chip)
245 {
246 	if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
247 	    chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
248 		chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
249 	return 0;
250 }
251 
ricoh_mmc_probe_slot(struct sdhci_pci_slot * slot)252 static int ricoh_mmc_probe_slot(struct sdhci_pci_slot *slot)
253 {
254 	u32 caps =
255 		FIELD_PREP(SDHCI_TIMEOUT_CLK_MASK, 0x21) |
256 		FIELD_PREP(SDHCI_CLOCK_BASE_MASK, 0x21) |
257 		SDHCI_TIMEOUT_CLK_UNIT |
258 		SDHCI_CAN_VDD_330 |
259 		SDHCI_CAN_DO_HISPD |
260 		SDHCI_CAN_DO_SDMA;
261 	u32 caps1 = 0;
262 
263 	__sdhci_read_caps(slot->host, NULL, &caps, &caps1);
264 	return 0;
265 }
266 
267 #ifdef CONFIG_PM_SLEEP
ricoh_mmc_resume(struct sdhci_pci_chip * chip)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 };
294 
ene_714_set_ios(struct mmc_host * mmc,struct mmc_ios * ios)295 static void ene_714_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
296 {
297 	struct sdhci_host *host = mmc_priv(mmc);
298 
299 	sdhci_set_ios(mmc, ios);
300 
301 	/*
302 	 * Some (ENE) controllers misbehave on some ios operations,
303 	 * signalling timeout and CRC errors even on CMD0. Resetting
304 	 * it on each ios seems to solve the problem.
305 	 */
306 	if (!(host->flags & SDHCI_DEVICE_DEAD))
307 		sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
308 }
309 
ene_714_probe_slot(struct sdhci_pci_slot * slot)310 static int ene_714_probe_slot(struct sdhci_pci_slot *slot)
311 {
312 	slot->host->mmc_host_ops.set_ios = ene_714_set_ios;
313 	return 0;
314 }
315 
316 static const struct sdhci_pci_fixes sdhci_ene_712 = {
317 	.quirks		= SDHCI_QUIRK_SINGLE_POWER_WRITE |
318 			  SDHCI_QUIRK_BROKEN_DMA,
319 };
320 
321 static const struct sdhci_pci_fixes sdhci_ene_714 = {
322 	.quirks		= SDHCI_QUIRK_SINGLE_POWER_WRITE |
323 			  SDHCI_QUIRK_BROKEN_DMA,
324 	.probe_slot	= ene_714_probe_slot,
325 };
326 
327 static const struct sdhci_pci_fixes sdhci_cafe = {
328 	.quirks		= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
329 			  SDHCI_QUIRK_NO_BUSY_IRQ |
330 			  SDHCI_QUIRK_BROKEN_CARD_DETECTION |
331 			  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
332 };
333 
334 static const struct sdhci_pci_fixes sdhci_intel_qrk = {
335 	.quirks		= SDHCI_QUIRK_NO_HISPD_BIT,
336 };
337 
mrst_hc_probe_slot(struct sdhci_pci_slot * slot)338 static int mrst_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 /*
345  * ADMA operation is disabled for Moorestown platform due to
346  * hardware bugs.
347  */
mrst_hc_probe(struct sdhci_pci_chip * chip)348 static int mrst_hc_probe(struct sdhci_pci_chip *chip)
349 {
350 	/*
351 	 * slots number is fixed here for MRST as SDIO3/5 are never used and
352 	 * have hardware bugs.
353 	 */
354 	chip->num_slots = 1;
355 	return 0;
356 }
357 
pch_hc_probe_slot(struct sdhci_pci_slot * slot)358 static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
359 {
360 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
361 	return 0;
362 }
363 
mfd_emmc_probe_slot(struct sdhci_pci_slot * slot)364 static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
365 {
366 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
367 	slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC;
368 	return 0;
369 }
370 
mfd_sdio_probe_slot(struct sdhci_pci_slot * slot)371 static int mfd_sdio_probe_slot(struct sdhci_pci_slot *slot)
372 {
373 	slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE;
374 	return 0;
375 }
376 
377 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
378 	.quirks		= SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
379 	.probe_slot	= mrst_hc_probe_slot,
380 };
381 
382 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
383 	.quirks		= SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
384 	.probe		= mrst_hc_probe,
385 };
386 
387 static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
388 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
389 	.allow_runtime_pm = true,
390 	.own_cd_for_runtime_pm = true,
391 };
392 
393 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
394 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
395 	.quirks2	= SDHCI_QUIRK2_HOST_OFF_CARD_ON,
396 	.allow_runtime_pm = true,
397 	.probe_slot	= mfd_sdio_probe_slot,
398 };
399 
400 static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
401 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
402 	.allow_runtime_pm = true,
403 	.probe_slot	= mfd_emmc_probe_slot,
404 };
405 
406 static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
407 	.quirks		= SDHCI_QUIRK_BROKEN_ADMA,
408 	.probe_slot	= pch_hc_probe_slot,
409 };
410 
411 #ifdef CONFIG_X86
412 
413 #define BYT_IOSF_SCCEP			0x63
414 #define BYT_IOSF_OCP_NETCTRL0		0x1078
415 #define BYT_IOSF_OCP_TIMEOUT_BASE	GENMASK(10, 8)
416 
byt_ocp_setting(struct pci_dev * pdev)417 static void byt_ocp_setting(struct pci_dev *pdev)
418 {
419 	u32 val = 0;
420 
421 	if (pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC &&
422 	    pdev->device != PCI_DEVICE_ID_INTEL_BYT_SDIO &&
423 	    pdev->device != PCI_DEVICE_ID_INTEL_BYT_SD &&
424 	    pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC2)
425 		return;
426 
427 	if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
428 			  &val)) {
429 		dev_err(&pdev->dev, "%s read error\n", __func__);
430 		return;
431 	}
432 
433 	if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
434 		return;
435 
436 	val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
437 
438 	if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
439 			   val)) {
440 		dev_err(&pdev->dev, "%s write error\n", __func__);
441 		return;
442 	}
443 
444 	dev_dbg(&pdev->dev, "%s completed\n", __func__);
445 }
446 
447 #else
448 
byt_ocp_setting(struct pci_dev * pdev)449 static inline void byt_ocp_setting(struct pci_dev *pdev)
450 {
451 }
452 
453 #endif
454 
455 enum {
456 	INTEL_DSM_FNS		=  0,
457 	INTEL_DSM_V18_SWITCH	=  3,
458 	INTEL_DSM_V33_SWITCH	=  4,
459 	INTEL_DSM_DRV_STRENGTH	=  9,
460 	INTEL_DSM_D3_RETUNE	= 10,
461 };
462 
463 struct intel_host {
464 	u32	dsm_fns;
465 	int	drv_strength;
466 	bool	d3_retune;
467 	bool	rpm_retune_ok;
468 	bool	needs_pwr_off;
469 	u32	glk_rx_ctrl1;
470 	u32	glk_tun_val;
471 	u32	active_ltr;
472 	u32	idle_ltr;
473 };
474 
475 static const guid_t intel_dsm_guid =
476 	GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
477 		  0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
478 
__intel_dsm(struct intel_host * intel_host,struct device * dev,unsigned int fn,u32 * result)479 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
480 		       unsigned int fn, u32 *result)
481 {
482 	union acpi_object *obj;
483 	int err = 0;
484 	size_t len;
485 
486 	obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
487 	if (!obj)
488 		return -EOPNOTSUPP;
489 
490 	if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < 1) {
491 		err = -EINVAL;
492 		goto out;
493 	}
494 
495 	len = min_t(size_t, obj->buffer.length, 4);
496 
497 	*result = 0;
498 	memcpy(result, obj->buffer.pointer, len);
499 out:
500 	ACPI_FREE(obj);
501 
502 	return err;
503 }
504 
intel_dsm(struct intel_host * intel_host,struct device * dev,unsigned int fn,u32 * result)505 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
506 		     unsigned int fn, u32 *result)
507 {
508 	if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
509 		return -EOPNOTSUPP;
510 
511 	return __intel_dsm(intel_host, dev, fn, result);
512 }
513 
intel_dsm_init(struct intel_host * intel_host,struct device * dev,struct mmc_host * mmc)514 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
515 			   struct mmc_host *mmc)
516 {
517 	int err;
518 	u32 val;
519 
520 	intel_host->d3_retune = true;
521 
522 	err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
523 	if (err) {
524 		pr_debug("%s: DSM not supported, error %d\n",
525 			 mmc_hostname(mmc), err);
526 		return;
527 	}
528 
529 	pr_debug("%s: DSM function mask %#x\n",
530 		 mmc_hostname(mmc), intel_host->dsm_fns);
531 
532 	err = intel_dsm(intel_host, dev, INTEL_DSM_DRV_STRENGTH, &val);
533 	intel_host->drv_strength = err ? 0 : val;
534 
535 	err = intel_dsm(intel_host, dev, INTEL_DSM_D3_RETUNE, &val);
536 	intel_host->d3_retune = err ? true : !!val;
537 }
538 
sdhci_pci_int_hw_reset(struct sdhci_host * host)539 static void sdhci_pci_int_hw_reset(struct sdhci_host *host)
540 {
541 	u8 reg;
542 
543 	reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
544 	reg |= 0x10;
545 	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
546 	/* For eMMC, minimum is 1us but give it 9us for good measure */
547 	udelay(9);
548 	reg &= ~0x10;
549 	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
550 	/* For eMMC, minimum is 200us but give it 300us for good measure */
551 	usleep_range(300, 1000);
552 }
553 
intel_select_drive_strength(struct mmc_card * card,unsigned int max_dtr,int host_drv,int card_drv,int * drv_type)554 static int intel_select_drive_strength(struct mmc_card *card,
555 				       unsigned int max_dtr, int host_drv,
556 				       int card_drv, int *drv_type)
557 {
558 	struct sdhci_host *host = mmc_priv(card->host);
559 	struct sdhci_pci_slot *slot = sdhci_priv(host);
560 	struct intel_host *intel_host = sdhci_pci_priv(slot);
561 
562 	if (!(mmc_driver_type_mask(intel_host->drv_strength) & card_drv))
563 		return 0;
564 
565 	return intel_host->drv_strength;
566 }
567 
bxt_get_cd(struct mmc_host * mmc)568 static int bxt_get_cd(struct mmc_host *mmc)
569 {
570 	int gpio_cd = mmc_gpio_get_cd(mmc);
571 
572 	if (!gpio_cd)
573 		return 0;
574 
575 	return sdhci_get_cd_nogpio(mmc);
576 }
577 
mrfld_get_cd(struct mmc_host * mmc)578 static int mrfld_get_cd(struct mmc_host *mmc)
579 {
580 	return sdhci_get_cd_nogpio(mmc);
581 }
582 
583 #define SDHCI_INTEL_PWR_TIMEOUT_CNT	20
584 #define SDHCI_INTEL_PWR_TIMEOUT_UDELAY	100
585 
sdhci_intel_set_power(struct sdhci_host * host,unsigned char mode,unsigned short vdd)586 static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode,
587 				  unsigned short vdd)
588 {
589 	struct sdhci_pci_slot *slot = sdhci_priv(host);
590 	struct intel_host *intel_host = sdhci_pci_priv(slot);
591 	int cntr;
592 	u8 reg;
593 
594 	/*
595 	 * Bus power may control card power, but a full reset still may not
596 	 * reset the power, whereas a direct write to SDHCI_POWER_CONTROL can.
597 	 * That might be needed to initialize correctly, if the card was left
598 	 * powered on previously.
599 	 */
600 	if (intel_host->needs_pwr_off) {
601 		intel_host->needs_pwr_off = false;
602 		if (mode != MMC_POWER_OFF) {
603 			sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
604 			usleep_range(10000, 12500);
605 		}
606 	}
607 
608 	sdhci_set_power(host, mode, vdd);
609 
610 	if (mode == MMC_POWER_OFF)
611 		return;
612 
613 	/*
614 	 * Bus power might not enable after D3 -> D0 transition due to the
615 	 * present state not yet having propagated. Retry for up to 2ms.
616 	 */
617 	for (cntr = 0; cntr < SDHCI_INTEL_PWR_TIMEOUT_CNT; cntr++) {
618 		reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
619 		if (reg & SDHCI_POWER_ON)
620 			break;
621 		udelay(SDHCI_INTEL_PWR_TIMEOUT_UDELAY);
622 		reg |= SDHCI_POWER_ON;
623 		sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
624 	}
625 }
626 
sdhci_intel_set_uhs_signaling(struct sdhci_host * host,unsigned int timing)627 static void sdhci_intel_set_uhs_signaling(struct sdhci_host *host,
628 					  unsigned int timing)
629 {
630 	/* Set UHS timing to SDR25 for High Speed mode */
631 	if (timing == MMC_TIMING_MMC_HS || timing == MMC_TIMING_SD_HS)
632 		timing = MMC_TIMING_UHS_SDR25;
633 	sdhci_set_uhs_signaling(host, timing);
634 }
635 
636 #define INTEL_HS400_ES_REG 0x78
637 #define INTEL_HS400_ES_BIT BIT(0)
638 
intel_hs400_enhanced_strobe(struct mmc_host * mmc,struct mmc_ios * ios)639 static void intel_hs400_enhanced_strobe(struct mmc_host *mmc,
640 					struct mmc_ios *ios)
641 {
642 	struct sdhci_host *host = mmc_priv(mmc);
643 	u32 val;
644 
645 	val = sdhci_readl(host, INTEL_HS400_ES_REG);
646 	if (ios->enhanced_strobe)
647 		val |= INTEL_HS400_ES_BIT;
648 	else
649 		val &= ~INTEL_HS400_ES_BIT;
650 	sdhci_writel(host, val, INTEL_HS400_ES_REG);
651 }
652 
intel_start_signal_voltage_switch(struct mmc_host * mmc,struct mmc_ios * ios)653 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
654 					     struct mmc_ios *ios)
655 {
656 	struct device *dev = mmc_dev(mmc);
657 	struct sdhci_host *host = mmc_priv(mmc);
658 	struct sdhci_pci_slot *slot = sdhci_priv(host);
659 	struct intel_host *intel_host = sdhci_pci_priv(slot);
660 	unsigned int fn;
661 	u32 result = 0;
662 	int err;
663 
664 	err = sdhci_start_signal_voltage_switch(mmc, ios);
665 	if (err)
666 		return err;
667 
668 	switch (ios->signal_voltage) {
669 	case MMC_SIGNAL_VOLTAGE_330:
670 		fn = INTEL_DSM_V33_SWITCH;
671 		break;
672 	case MMC_SIGNAL_VOLTAGE_180:
673 		fn = INTEL_DSM_V18_SWITCH;
674 		break;
675 	default:
676 		return 0;
677 	}
678 
679 	err = intel_dsm(intel_host, dev, fn, &result);
680 	pr_debug("%s: %s DSM fn %u error %d result %u\n",
681 		 mmc_hostname(mmc), __func__, fn, err, result);
682 
683 	return 0;
684 }
685 
686 static const struct sdhci_ops sdhci_intel_byt_ops = {
687 	.set_clock		= sdhci_set_clock,
688 	.set_power		= sdhci_intel_set_power,
689 	.enable_dma		= sdhci_pci_enable_dma,
690 	.set_bus_width		= sdhci_set_bus_width,
691 	.reset			= sdhci_reset,
692 	.set_uhs_signaling	= sdhci_intel_set_uhs_signaling,
693 	.hw_reset		= sdhci_pci_hw_reset,
694 };
695 
696 static const struct sdhci_ops sdhci_intel_glk_ops = {
697 	.set_clock		= sdhci_set_clock,
698 	.set_power		= sdhci_intel_set_power,
699 	.enable_dma		= sdhci_pci_enable_dma,
700 	.set_bus_width		= sdhci_set_bus_width,
701 	.reset			= sdhci_and_cqhci_reset,
702 	.set_uhs_signaling	= sdhci_intel_set_uhs_signaling,
703 	.hw_reset		= sdhci_pci_hw_reset,
704 	.irq			= sdhci_cqhci_irq,
705 };
706 
byt_read_dsm(struct sdhci_pci_slot * slot)707 static void byt_read_dsm(struct sdhci_pci_slot *slot)
708 {
709 	struct intel_host *intel_host = sdhci_pci_priv(slot);
710 	struct device *dev = &slot->chip->pdev->dev;
711 	struct mmc_host *mmc = slot->host->mmc;
712 
713 	intel_dsm_init(intel_host, dev, mmc);
714 	slot->chip->rpm_retune = intel_host->d3_retune;
715 }
716 
intel_execute_tuning(struct mmc_host * mmc,u32 opcode)717 static int intel_execute_tuning(struct mmc_host *mmc, u32 opcode)
718 {
719 	int err = sdhci_execute_tuning(mmc, opcode);
720 	struct sdhci_host *host = mmc_priv(mmc);
721 
722 	if (err)
723 		return err;
724 
725 	/*
726 	 * Tuning can leave the IP in an active state (Buffer Read Enable bit
727 	 * set) which prevents the entry to low power states (i.e. S0i3). Data
728 	 * reset will clear it.
729 	 */
730 	sdhci_reset(host, SDHCI_RESET_DATA);
731 
732 	return 0;
733 }
734 
735 #define INTEL_ACTIVELTR		0x804
736 #define INTEL_IDLELTR		0x808
737 
738 #define INTEL_LTR_REQ		BIT(15)
739 #define INTEL_LTR_SCALE_MASK	GENMASK(11, 10)
740 #define INTEL_LTR_SCALE_1US	(2 << 10)
741 #define INTEL_LTR_SCALE_32US	(3 << 10)
742 #define INTEL_LTR_VALUE_MASK	GENMASK(9, 0)
743 
intel_cache_ltr(struct sdhci_pci_slot * slot)744 static void intel_cache_ltr(struct sdhci_pci_slot *slot)
745 {
746 	struct intel_host *intel_host = sdhci_pci_priv(slot);
747 	struct sdhci_host *host = slot->host;
748 
749 	intel_host->active_ltr = readl(host->ioaddr + INTEL_ACTIVELTR);
750 	intel_host->idle_ltr = readl(host->ioaddr + INTEL_IDLELTR);
751 }
752 
intel_ltr_set(struct device * dev,s32 val)753 static void intel_ltr_set(struct device *dev, s32 val)
754 {
755 	struct sdhci_pci_chip *chip = dev_get_drvdata(dev);
756 	struct sdhci_pci_slot *slot = chip->slots[0];
757 	struct intel_host *intel_host = sdhci_pci_priv(slot);
758 	struct sdhci_host *host = slot->host;
759 	u32 ltr;
760 
761 	pm_runtime_get_sync(dev);
762 
763 	/*
764 	 * Program latency tolerance (LTR) accordingly what has been asked
765 	 * by the PM QoS layer or disable it in case we were passed
766 	 * negative value or PM_QOS_LATENCY_ANY.
767 	 */
768 	ltr = readl(host->ioaddr + INTEL_ACTIVELTR);
769 
770 	if (val == PM_QOS_LATENCY_ANY || val < 0) {
771 		ltr &= ~INTEL_LTR_REQ;
772 	} else {
773 		ltr |= INTEL_LTR_REQ;
774 		ltr &= ~INTEL_LTR_SCALE_MASK;
775 		ltr &= ~INTEL_LTR_VALUE_MASK;
776 
777 		if (val > INTEL_LTR_VALUE_MASK) {
778 			val >>= 5;
779 			if (val > INTEL_LTR_VALUE_MASK)
780 				val = INTEL_LTR_VALUE_MASK;
781 			ltr |= INTEL_LTR_SCALE_32US | val;
782 		} else {
783 			ltr |= INTEL_LTR_SCALE_1US | val;
784 		}
785 	}
786 
787 	if (ltr == intel_host->active_ltr)
788 		goto out;
789 
790 	writel(ltr, host->ioaddr + INTEL_ACTIVELTR);
791 	writel(ltr, host->ioaddr + INTEL_IDLELTR);
792 
793 	/* Cache the values into lpss structure */
794 	intel_cache_ltr(slot);
795 out:
796 	pm_runtime_put_autosuspend(dev);
797 }
798 
intel_use_ltr(struct sdhci_pci_chip * chip)799 static bool intel_use_ltr(struct sdhci_pci_chip *chip)
800 {
801 	switch (chip->pdev->device) {
802 	case PCI_DEVICE_ID_INTEL_BYT_EMMC:
803 	case PCI_DEVICE_ID_INTEL_BYT_EMMC2:
804 	case PCI_DEVICE_ID_INTEL_BYT_SDIO:
805 	case PCI_DEVICE_ID_INTEL_BYT_SD:
806 	case PCI_DEVICE_ID_INTEL_BSW_EMMC:
807 	case PCI_DEVICE_ID_INTEL_BSW_SDIO:
808 	case PCI_DEVICE_ID_INTEL_BSW_SD:
809 		return false;
810 	default:
811 		return true;
812 	}
813 }
814 
intel_ltr_expose(struct sdhci_pci_chip * chip)815 static void intel_ltr_expose(struct sdhci_pci_chip *chip)
816 {
817 	struct device *dev = &chip->pdev->dev;
818 
819 	if (!intel_use_ltr(chip))
820 		return;
821 
822 	dev->power.set_latency_tolerance = intel_ltr_set;
823 	dev_pm_qos_expose_latency_tolerance(dev);
824 }
825 
intel_ltr_hide(struct sdhci_pci_chip * chip)826 static void intel_ltr_hide(struct sdhci_pci_chip *chip)
827 {
828 	struct device *dev = &chip->pdev->dev;
829 
830 	if (!intel_use_ltr(chip))
831 		return;
832 
833 	dev_pm_qos_hide_latency_tolerance(dev);
834 	dev->power.set_latency_tolerance = NULL;
835 }
836 
byt_probe_slot(struct sdhci_pci_slot * slot)837 static void byt_probe_slot(struct sdhci_pci_slot *slot)
838 {
839 	struct mmc_host_ops *ops = &slot->host->mmc_host_ops;
840 	struct device *dev = &slot->chip->pdev->dev;
841 	struct mmc_host *mmc = slot->host->mmc;
842 
843 	byt_read_dsm(slot);
844 
845 	byt_ocp_setting(slot->chip->pdev);
846 
847 	ops->execute_tuning = intel_execute_tuning;
848 	ops->start_signal_voltage_switch = intel_start_signal_voltage_switch;
849 
850 	device_property_read_u32(dev, "max-frequency", &mmc->f_max);
851 
852 	if (!mmc->slotno) {
853 		slot->chip->slots[mmc->slotno] = slot;
854 		intel_ltr_expose(slot->chip);
855 	}
856 }
857 
byt_add_debugfs(struct sdhci_pci_slot * slot)858 static void byt_add_debugfs(struct sdhci_pci_slot *slot)
859 {
860 	struct intel_host *intel_host = sdhci_pci_priv(slot);
861 	struct mmc_host *mmc = slot->host->mmc;
862 	struct dentry *dir = mmc->debugfs_root;
863 
864 	if (!intel_use_ltr(slot->chip))
865 		return;
866 
867 	debugfs_create_x32("active_ltr", 0444, dir, &intel_host->active_ltr);
868 	debugfs_create_x32("idle_ltr", 0444, dir, &intel_host->idle_ltr);
869 
870 	intel_cache_ltr(slot);
871 }
872 
byt_add_host(struct sdhci_pci_slot * slot)873 static int byt_add_host(struct sdhci_pci_slot *slot)
874 {
875 	int ret = sdhci_add_host(slot->host);
876 
877 	if (!ret)
878 		byt_add_debugfs(slot);
879 	return ret;
880 }
881 
byt_remove_slot(struct sdhci_pci_slot * slot,int dead)882 static void byt_remove_slot(struct sdhci_pci_slot *slot, int dead)
883 {
884 	struct mmc_host *mmc = slot->host->mmc;
885 
886 	if (!mmc->slotno)
887 		intel_ltr_hide(slot->chip);
888 }
889 
byt_emmc_probe_slot(struct sdhci_pci_slot * slot)890 static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
891 {
892 	byt_probe_slot(slot);
893 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
894 				 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
895 				 MMC_CAP_CMD_DURING_TFR |
896 				 MMC_CAP_WAIT_WHILE_BUSY;
897 	slot->hw_reset = sdhci_pci_int_hw_reset;
898 	if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC)
899 		slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
900 	slot->host->mmc_host_ops.select_drive_strength =
901 						intel_select_drive_strength;
902 	return 0;
903 }
904 
glk_broken_cqhci(struct sdhci_pci_slot * slot)905 static bool glk_broken_cqhci(struct sdhci_pci_slot *slot)
906 {
907 	return slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_EMMC &&
908 	       (dmi_match(DMI_BIOS_VENDOR, "LENOVO") ||
909 		dmi_match(DMI_SYS_VENDOR, "IRBIS"));
910 }
911 
jsl_broken_hs400es(struct sdhci_pci_slot * slot)912 static bool jsl_broken_hs400es(struct sdhci_pci_slot *slot)
913 {
914 	return slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_JSL_EMMC &&
915 			dmi_match(DMI_BIOS_VENDOR, "ASUSTeK COMPUTER INC.");
916 }
917 
glk_emmc_probe_slot(struct sdhci_pci_slot * slot)918 static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
919 {
920 	int ret = byt_emmc_probe_slot(slot);
921 
922 	if (!glk_broken_cqhci(slot))
923 		slot->host->mmc->caps2 |= MMC_CAP2_CQE;
924 
925 	if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
926 		if (!jsl_broken_hs400es(slot)) {
927 			slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES;
928 			slot->host->mmc_host_ops.hs400_enhanced_strobe =
929 							intel_hs400_enhanced_strobe;
930 		}
931 		slot->host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
932 	}
933 
934 	return ret;
935 }
936 
937 static const struct cqhci_host_ops glk_cqhci_ops = {
938 	.enable		= sdhci_cqe_enable,
939 	.disable	= sdhci_cqe_disable,
940 	.dumpregs	= sdhci_pci_dumpregs,
941 };
942 
glk_emmc_add_host(struct sdhci_pci_slot * slot)943 static int glk_emmc_add_host(struct sdhci_pci_slot *slot)
944 {
945 	struct device *dev = &slot->chip->pdev->dev;
946 	struct sdhci_host *host = slot->host;
947 	struct cqhci_host *cq_host;
948 	bool dma64;
949 	int ret;
950 
951 	ret = sdhci_setup_host(host);
952 	if (ret)
953 		return ret;
954 
955 	cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
956 	if (!cq_host) {
957 		ret = -ENOMEM;
958 		goto cleanup;
959 	}
960 
961 	cq_host->mmio = host->ioaddr + 0x200;
962 	cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ;
963 	cq_host->ops = &glk_cqhci_ops;
964 
965 	dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
966 	if (dma64)
967 		cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
968 
969 	ret = cqhci_init(cq_host, host->mmc, dma64);
970 	if (ret)
971 		goto cleanup;
972 
973 	ret = __sdhci_add_host(host);
974 	if (ret)
975 		goto cleanup;
976 
977 	byt_add_debugfs(slot);
978 
979 	return 0;
980 
981 cleanup:
982 	sdhci_cleanup_host(host);
983 	return ret;
984 }
985 
986 #ifdef CONFIG_PM
987 #define GLK_RX_CTRL1	0x834
988 #define GLK_TUN_VAL	0x840
989 #define GLK_PATH_PLL	GENMASK(13, 8)
990 #define GLK_DLY		GENMASK(6, 0)
991 /* Workaround firmware failing to restore the tuning value */
glk_rpm_retune_wa(struct sdhci_pci_chip * chip,bool susp)992 static void glk_rpm_retune_wa(struct sdhci_pci_chip *chip, bool susp)
993 {
994 	struct sdhci_pci_slot *slot = chip->slots[0];
995 	struct intel_host *intel_host = sdhci_pci_priv(slot);
996 	struct sdhci_host *host = slot->host;
997 	u32 glk_rx_ctrl1;
998 	u32 glk_tun_val;
999 	u32 dly;
1000 
1001 	if (intel_host->rpm_retune_ok || !mmc_can_retune(host->mmc))
1002 		return;
1003 
1004 	glk_rx_ctrl1 = sdhci_readl(host, GLK_RX_CTRL1);
1005 	glk_tun_val = sdhci_readl(host, GLK_TUN_VAL);
1006 
1007 	if (susp) {
1008 		intel_host->glk_rx_ctrl1 = glk_rx_ctrl1;
1009 		intel_host->glk_tun_val = glk_tun_val;
1010 		return;
1011 	}
1012 
1013 	if (!intel_host->glk_tun_val)
1014 		return;
1015 
1016 	if (glk_rx_ctrl1 != intel_host->glk_rx_ctrl1) {
1017 		intel_host->rpm_retune_ok = true;
1018 		return;
1019 	}
1020 
1021 	dly = FIELD_PREP(GLK_DLY, FIELD_GET(GLK_PATH_PLL, glk_rx_ctrl1) +
1022 				  (intel_host->glk_tun_val << 1));
1023 	if (dly == FIELD_GET(GLK_DLY, glk_rx_ctrl1))
1024 		return;
1025 
1026 	glk_rx_ctrl1 = (glk_rx_ctrl1 & ~GLK_DLY) | dly;
1027 	sdhci_writel(host, glk_rx_ctrl1, GLK_RX_CTRL1);
1028 
1029 	intel_host->rpm_retune_ok = true;
1030 	chip->rpm_retune = true;
1031 	mmc_retune_needed(host->mmc);
1032 	pr_info("%s: Requiring re-tune after rpm resume", mmc_hostname(host->mmc));
1033 }
1034 
glk_rpm_retune_chk(struct sdhci_pci_chip * chip,bool susp)1035 static void glk_rpm_retune_chk(struct sdhci_pci_chip *chip, bool susp)
1036 {
1037 	if (chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_EMMC &&
1038 	    !chip->rpm_retune)
1039 		glk_rpm_retune_wa(chip, susp);
1040 }
1041 
glk_runtime_suspend(struct sdhci_pci_chip * chip)1042 static int glk_runtime_suspend(struct sdhci_pci_chip *chip)
1043 {
1044 	glk_rpm_retune_chk(chip, true);
1045 
1046 	return sdhci_cqhci_runtime_suspend(chip);
1047 }
1048 
glk_runtime_resume(struct sdhci_pci_chip * chip)1049 static int glk_runtime_resume(struct sdhci_pci_chip *chip)
1050 {
1051 	glk_rpm_retune_chk(chip, false);
1052 
1053 	return sdhci_cqhci_runtime_resume(chip);
1054 }
1055 #endif
1056 
1057 #ifdef CONFIG_ACPI
ni_set_max_freq(struct sdhci_pci_slot * slot)1058 static int ni_set_max_freq(struct sdhci_pci_slot *slot)
1059 {
1060 	acpi_status status;
1061 	unsigned long long max_freq;
1062 
1063 	status = acpi_evaluate_integer(ACPI_HANDLE(&slot->chip->pdev->dev),
1064 				       "MXFQ", NULL, &max_freq);
1065 	if (ACPI_FAILURE(status)) {
1066 		dev_err(&slot->chip->pdev->dev,
1067 			"MXFQ not found in acpi table\n");
1068 		return -EINVAL;
1069 	}
1070 
1071 	slot->host->mmc->f_max = max_freq * 1000000;
1072 
1073 	return 0;
1074 }
1075 #else
ni_set_max_freq(struct sdhci_pci_slot * slot)1076 static inline int ni_set_max_freq(struct sdhci_pci_slot *slot)
1077 {
1078 	return 0;
1079 }
1080 #endif
1081 
ni_byt_sdio_probe_slot(struct sdhci_pci_slot * slot)1082 static int ni_byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
1083 {
1084 	int err;
1085 
1086 	byt_probe_slot(slot);
1087 
1088 	err = ni_set_max_freq(slot);
1089 	if (err)
1090 		return err;
1091 
1092 	slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
1093 				 MMC_CAP_WAIT_WHILE_BUSY;
1094 	return 0;
1095 }
1096 
byt_sdio_probe_slot(struct sdhci_pci_slot * slot)1097 static int byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
1098 {
1099 	byt_probe_slot(slot);
1100 	slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
1101 				 MMC_CAP_WAIT_WHILE_BUSY;
1102 	return 0;
1103 }
1104 
byt_needs_pwr_off(struct sdhci_pci_slot * slot)1105 static void byt_needs_pwr_off(struct sdhci_pci_slot *slot)
1106 {
1107 	struct intel_host *intel_host = sdhci_pci_priv(slot);
1108 	u8 reg = sdhci_readb(slot->host, SDHCI_POWER_CONTROL);
1109 
1110 	intel_host->needs_pwr_off = reg  & SDHCI_POWER_ON;
1111 }
1112 
byt_sd_probe_slot(struct sdhci_pci_slot * slot)1113 static int byt_sd_probe_slot(struct sdhci_pci_slot *slot)
1114 {
1115 	byt_probe_slot(slot);
1116 	slot->host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY |
1117 				 MMC_CAP_AGGRESSIVE_PM | MMC_CAP_CD_WAKE;
1118 	slot->cd_idx = 0;
1119 	slot->cd_override_level = true;
1120 	if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXT_SD ||
1121 	    slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXTM_SD ||
1122 	    slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_APL_SD ||
1123 	    slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_SD)
1124 		slot->host->mmc_host_ops.get_cd = bxt_get_cd;
1125 
1126 	if (slot->chip->pdev->subsystem_vendor == PCI_VENDOR_ID_NI &&
1127 	    slot->chip->pdev->subsystem_device == PCI_SUBDEVICE_ID_NI_78E3)
1128 		slot->host->mmc->caps2 |= MMC_CAP2_AVOID_3_3V;
1129 
1130 	byt_needs_pwr_off(slot);
1131 
1132 	return 0;
1133 }
1134 
1135 #ifdef CONFIG_PM_SLEEP
1136 
byt_resume(struct sdhci_pci_chip * chip)1137 static int byt_resume(struct sdhci_pci_chip *chip)
1138 {
1139 	byt_ocp_setting(chip->pdev);
1140 
1141 	return sdhci_pci_resume_host(chip);
1142 }
1143 
1144 #endif
1145 
1146 #ifdef CONFIG_PM
1147 
byt_runtime_resume(struct sdhci_pci_chip * chip)1148 static int byt_runtime_resume(struct sdhci_pci_chip *chip)
1149 {
1150 	byt_ocp_setting(chip->pdev);
1151 
1152 	return sdhci_pci_runtime_resume_host(chip);
1153 }
1154 
1155 #endif
1156 
1157 static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
1158 #ifdef CONFIG_PM_SLEEP
1159 	.resume		= byt_resume,
1160 #endif
1161 #ifdef CONFIG_PM
1162 	.runtime_resume	= byt_runtime_resume,
1163 #endif
1164 	.allow_runtime_pm = true,
1165 	.probe_slot	= byt_emmc_probe_slot,
1166 	.add_host	= byt_add_host,
1167 	.remove_slot	= byt_remove_slot,
1168 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1169 			  SDHCI_QUIRK_NO_LED,
1170 	.quirks2	= SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1171 			  SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1172 			  SDHCI_QUIRK2_STOP_WITH_TC,
1173 	.ops		= &sdhci_intel_byt_ops,
1174 	.priv_size	= sizeof(struct intel_host),
1175 };
1176 
1177 static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = {
1178 	.allow_runtime_pm	= true,
1179 	.probe_slot		= glk_emmc_probe_slot,
1180 	.add_host		= glk_emmc_add_host,
1181 	.remove_slot		= byt_remove_slot,
1182 #ifdef CONFIG_PM_SLEEP
1183 	.suspend		= sdhci_cqhci_suspend,
1184 	.resume			= sdhci_cqhci_resume,
1185 #endif
1186 #ifdef CONFIG_PM
1187 	.runtime_suspend	= glk_runtime_suspend,
1188 	.runtime_resume		= glk_runtime_resume,
1189 #endif
1190 	.quirks			= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1191 				  SDHCI_QUIRK_NO_LED,
1192 	.quirks2		= SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1193 				  SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
1194 				  SDHCI_QUIRK2_STOP_WITH_TC,
1195 	.ops			= &sdhci_intel_glk_ops,
1196 	.priv_size		= sizeof(struct intel_host),
1197 };
1198 
1199 static const struct sdhci_pci_fixes sdhci_ni_byt_sdio = {
1200 #ifdef CONFIG_PM_SLEEP
1201 	.resume		= byt_resume,
1202 #endif
1203 #ifdef CONFIG_PM
1204 	.runtime_resume	= byt_runtime_resume,
1205 #endif
1206 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1207 			  SDHCI_QUIRK_NO_LED,
1208 	.quirks2	= SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1209 			  SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1210 	.allow_runtime_pm = true,
1211 	.probe_slot	= ni_byt_sdio_probe_slot,
1212 	.add_host	= byt_add_host,
1213 	.remove_slot	= byt_remove_slot,
1214 	.ops		= &sdhci_intel_byt_ops,
1215 	.priv_size	= sizeof(struct intel_host),
1216 };
1217 
1218 static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
1219 #ifdef CONFIG_PM_SLEEP
1220 	.resume		= byt_resume,
1221 #endif
1222 #ifdef CONFIG_PM
1223 	.runtime_resume	= byt_runtime_resume,
1224 #endif
1225 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1226 			  SDHCI_QUIRK_NO_LED,
1227 	.quirks2	= SDHCI_QUIRK2_HOST_OFF_CARD_ON |
1228 			SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1229 	.allow_runtime_pm = true,
1230 	.probe_slot	= byt_sdio_probe_slot,
1231 	.add_host	= byt_add_host,
1232 	.remove_slot	= byt_remove_slot,
1233 	.ops		= &sdhci_intel_byt_ops,
1234 	.priv_size	= sizeof(struct intel_host),
1235 };
1236 
1237 static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
1238 #ifdef CONFIG_PM_SLEEP
1239 	.resume		= byt_resume,
1240 #endif
1241 #ifdef CONFIG_PM
1242 	.runtime_resume	= byt_runtime_resume,
1243 #endif
1244 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
1245 			  SDHCI_QUIRK_NO_LED,
1246 	.quirks2	= SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
1247 			  SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1248 			  SDHCI_QUIRK2_STOP_WITH_TC,
1249 	.allow_runtime_pm = true,
1250 	.own_cd_for_runtime_pm = true,
1251 	.probe_slot	= byt_sd_probe_slot,
1252 	.add_host	= byt_add_host,
1253 	.remove_slot	= byt_remove_slot,
1254 	.ops		= &sdhci_intel_byt_ops,
1255 	.priv_size	= sizeof(struct intel_host),
1256 };
1257 
1258 /* Define Host controllers for Intel Merrifield platform */
1259 #define INTEL_MRFLD_EMMC_0	0
1260 #define INTEL_MRFLD_EMMC_1	1
1261 #define INTEL_MRFLD_SD		2
1262 #define INTEL_MRFLD_SDIO	3
1263 
1264 #ifdef CONFIG_ACPI
intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot * slot)1265 static void intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot *slot)
1266 {
1267 	struct acpi_device *device;
1268 
1269 	device = ACPI_COMPANION(&slot->chip->pdev->dev);
1270 	if (device)
1271 		acpi_device_fix_up_power_extended(device);
1272 }
1273 #else
intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot * slot)1274 static inline void intel_mrfld_mmc_fix_up_power_slot(struct sdhci_pci_slot *slot) {}
1275 #endif
1276 
intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot * slot)1277 static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
1278 {
1279 	unsigned int func = PCI_FUNC(slot->chip->pdev->devfn);
1280 
1281 	switch (func) {
1282 	case INTEL_MRFLD_EMMC_0:
1283 	case INTEL_MRFLD_EMMC_1:
1284 		slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
1285 					 MMC_CAP_8_BIT_DATA |
1286 					 MMC_CAP_1_8V_DDR;
1287 		break;
1288 	case INTEL_MRFLD_SD:
1289 		slot->cd_idx = 0;
1290 		slot->cd_override_level = true;
1291 		/*
1292 		 * There are two PCB designs of SD card slot with the opposite
1293 		 * card detection sense. Quirk this out by ignoring GPIO state
1294 		 * completely in the custom ->get_cd() callback.
1295 		 */
1296 		slot->host->mmc_host_ops.get_cd = mrfld_get_cd;
1297 		slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1298 		break;
1299 	case INTEL_MRFLD_SDIO:
1300 		/* Advertise 2.0v for compatibility with the SDIO card's OCR */
1301 		slot->host->ocr_mask = MMC_VDD_20_21 | MMC_VDD_165_195;
1302 		slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
1303 					 MMC_CAP_POWER_OFF_CARD;
1304 		break;
1305 	default:
1306 		return -ENODEV;
1307 	}
1308 
1309 	intel_mrfld_mmc_fix_up_power_slot(slot);
1310 	return 0;
1311 }
1312 
1313 static const struct sdhci_pci_fixes sdhci_intel_mrfld_mmc = {
1314 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
1315 	.quirks2	= SDHCI_QUIRK2_BROKEN_HS200 |
1316 			SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
1317 	.allow_runtime_pm = true,
1318 	.probe_slot	= intel_mrfld_mmc_probe_slot,
1319 };
1320 
jmicron_pmos(struct sdhci_pci_chip * chip,int on)1321 static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
1322 {
1323 	u8 scratch;
1324 	int ret;
1325 
1326 	ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
1327 	if (ret)
1328 		return ret;
1329 
1330 	/*
1331 	 * Turn PMOS on [bit 0], set over current detection to 2.4 V
1332 	 * [bit 1:2] and enable over current debouncing [bit 6].
1333 	 */
1334 	if (on)
1335 		scratch |= 0x47;
1336 	else
1337 		scratch &= ~0x47;
1338 
1339 	return pci_write_config_byte(chip->pdev, 0xAE, scratch);
1340 }
1341 
jmicron_probe(struct sdhci_pci_chip * chip)1342 static int jmicron_probe(struct sdhci_pci_chip *chip)
1343 {
1344 	int ret;
1345 	u16 mmcdev = 0;
1346 
1347 	if (chip->pdev->revision == 0) {
1348 		chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
1349 			  SDHCI_QUIRK_32BIT_DMA_SIZE |
1350 			  SDHCI_QUIRK_32BIT_ADMA_SIZE |
1351 			  SDHCI_QUIRK_RESET_AFTER_REQUEST |
1352 			  SDHCI_QUIRK_BROKEN_SMALL_PIO;
1353 	}
1354 
1355 	/*
1356 	 * JMicron chips can have two interfaces to the same hardware
1357 	 * in order to work around limitations in Microsoft's driver.
1358 	 * We need to make sure we only bind to one of them.
1359 	 *
1360 	 * This code assumes two things:
1361 	 *
1362 	 * 1. The PCI code adds subfunctions in order.
1363 	 *
1364 	 * 2. The MMC interface has a lower subfunction number
1365 	 *    than the SD interface.
1366 	 */
1367 	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD)
1368 		mmcdev = PCI_DEVICE_ID_JMICRON_JMB38X_MMC;
1369 	else if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD)
1370 		mmcdev = PCI_DEVICE_ID_JMICRON_JMB388_ESD;
1371 
1372 	if (mmcdev) {
1373 		struct pci_dev *sd_dev;
1374 
1375 		sd_dev = NULL;
1376 		while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
1377 						mmcdev, sd_dev)) != NULL) {
1378 			if ((PCI_SLOT(chip->pdev->devfn) ==
1379 				PCI_SLOT(sd_dev->devfn)) &&
1380 				(chip->pdev->bus == sd_dev->bus))
1381 				break;
1382 		}
1383 
1384 		if (sd_dev) {
1385 			pci_dev_put(sd_dev);
1386 			dev_info(&chip->pdev->dev, "Refusing to bind to "
1387 				"secondary interface.\n");
1388 			return -ENODEV;
1389 		}
1390 	}
1391 
1392 	/*
1393 	 * JMicron chips need a bit of a nudge to enable the power
1394 	 * output pins.
1395 	 */
1396 	ret = jmicron_pmos(chip, 1);
1397 	if (ret) {
1398 		dev_err(&chip->pdev->dev, "Failure enabling card power\n");
1399 		return ret;
1400 	}
1401 
1402 	/* quirk for unsable RO-detection on JM388 chips */
1403 	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD ||
1404 	    chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1405 		chip->quirks |= SDHCI_QUIRK_UNSTABLE_RO_DETECT;
1406 
1407 	return 0;
1408 }
1409 
jmicron_enable_mmc(struct sdhci_host * host,int on)1410 static void jmicron_enable_mmc(struct sdhci_host *host, int on)
1411 {
1412 	u8 scratch;
1413 
1414 	scratch = readb(host->ioaddr + 0xC0);
1415 
1416 	if (on)
1417 		scratch |= 0x01;
1418 	else
1419 		scratch &= ~0x01;
1420 
1421 	writeb(scratch, host->ioaddr + 0xC0);
1422 }
1423 
jmicron_probe_slot(struct sdhci_pci_slot * slot)1424 static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
1425 {
1426 	if (slot->chip->pdev->revision == 0) {
1427 		u16 version;
1428 
1429 		version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
1430 		version = (version & SDHCI_VENDOR_VER_MASK) >>
1431 			SDHCI_VENDOR_VER_SHIFT;
1432 
1433 		/*
1434 		 * Older versions of the chip have lots of nasty glitches
1435 		 * in the ADMA engine. It's best just to avoid it
1436 		 * completely.
1437 		 */
1438 		if (version < 0xAC)
1439 			slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1440 	}
1441 
1442 	/* JM388 MMC doesn't support 1.8V while SD supports it */
1443 	if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1444 		slot->host->ocr_avail_sd = MMC_VDD_32_33 | MMC_VDD_33_34 |
1445 			MMC_VDD_29_30 | MMC_VDD_30_31 |
1446 			MMC_VDD_165_195; /* allow 1.8V */
1447 		slot->host->ocr_avail_mmc = MMC_VDD_32_33 | MMC_VDD_33_34 |
1448 			MMC_VDD_29_30 | MMC_VDD_30_31; /* no 1.8V for MMC */
1449 	}
1450 
1451 	/*
1452 	 * The secondary interface requires a bit set to get the
1453 	 * interrupts.
1454 	 */
1455 	if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1456 	    slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1457 		jmicron_enable_mmc(slot->host, 1);
1458 
1459 	slot->host->mmc->caps |= MMC_CAP_BUS_WIDTH_TEST;
1460 
1461 	return 0;
1462 }
1463 
jmicron_remove_slot(struct sdhci_pci_slot * slot,int dead)1464 static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
1465 {
1466 	if (dead)
1467 		return;
1468 
1469 	if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1470 	    slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
1471 		jmicron_enable_mmc(slot->host, 0);
1472 }
1473 
1474 #ifdef CONFIG_PM_SLEEP
jmicron_suspend(struct sdhci_pci_chip * chip)1475 static int jmicron_suspend(struct sdhci_pci_chip *chip)
1476 {
1477 	int i, ret;
1478 
1479 	ret = sdhci_pci_suspend_host(chip);
1480 	if (ret)
1481 		return ret;
1482 
1483 	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1484 	    chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1485 		for (i = 0; i < chip->num_slots; i++)
1486 			jmicron_enable_mmc(chip->slots[i]->host, 0);
1487 	}
1488 
1489 	return 0;
1490 }
1491 
jmicron_resume(struct sdhci_pci_chip * chip)1492 static int jmicron_resume(struct sdhci_pci_chip *chip)
1493 {
1494 	int ret, i;
1495 
1496 	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
1497 	    chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
1498 		for (i = 0; i < chip->num_slots; i++)
1499 			jmicron_enable_mmc(chip->slots[i]->host, 1);
1500 	}
1501 
1502 	ret = jmicron_pmos(chip, 1);
1503 	if (ret) {
1504 		dev_err(&chip->pdev->dev, "Failure enabling card power\n");
1505 		return ret;
1506 	}
1507 
1508 	return sdhci_pci_resume_host(chip);
1509 }
1510 #endif
1511 
1512 static const struct sdhci_pci_fixes sdhci_jmicron = {
1513 	.probe		= jmicron_probe,
1514 
1515 	.probe_slot	= jmicron_probe_slot,
1516 	.remove_slot	= jmicron_remove_slot,
1517 
1518 #ifdef CONFIG_PM_SLEEP
1519 	.suspend	= jmicron_suspend,
1520 	.resume		= jmicron_resume,
1521 #endif
1522 };
1523 
1524 /* SysKonnect CardBus2SDIO extra registers */
1525 #define SYSKT_CTRL		0x200
1526 #define SYSKT_RDFIFO_STAT	0x204
1527 #define SYSKT_WRFIFO_STAT	0x208
1528 #define SYSKT_POWER_DATA	0x20c
1529 #define   SYSKT_POWER_330	0xef
1530 #define   SYSKT_POWER_300	0xf8
1531 #define   SYSKT_POWER_184	0xcc
1532 #define SYSKT_POWER_CMD		0x20d
1533 #define   SYSKT_POWER_START	(1 << 7)
1534 #define SYSKT_POWER_STATUS	0x20e
1535 #define   SYSKT_POWER_STATUS_OK	(1 << 0)
1536 #define SYSKT_BOARD_REV		0x210
1537 #define SYSKT_CHIP_REV		0x211
1538 #define SYSKT_CONF_DATA		0x212
1539 #define   SYSKT_CONF_DATA_1V8	(1 << 2)
1540 #define   SYSKT_CONF_DATA_2V5	(1 << 1)
1541 #define   SYSKT_CONF_DATA_3V3	(1 << 0)
1542 
syskt_probe(struct sdhci_pci_chip * chip)1543 static int syskt_probe(struct sdhci_pci_chip *chip)
1544 {
1545 	if ((chip->pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
1546 		chip->pdev->class &= ~0x0000FF;
1547 		chip->pdev->class |= PCI_SDHCI_IFDMA;
1548 	}
1549 	return 0;
1550 }
1551 
syskt_probe_slot(struct sdhci_pci_slot * slot)1552 static int syskt_probe_slot(struct sdhci_pci_slot *slot)
1553 {
1554 	int tm, ps;
1555 
1556 	u8 board_rev = readb(slot->host->ioaddr + SYSKT_BOARD_REV);
1557 	u8  chip_rev = readb(slot->host->ioaddr + SYSKT_CHIP_REV);
1558 	dev_info(&slot->chip->pdev->dev, "SysKonnect CardBus2SDIO, "
1559 					 "board rev %d.%d, chip rev %d.%d\n",
1560 					 board_rev >> 4, board_rev & 0xf,
1561 					 chip_rev >> 4,  chip_rev & 0xf);
1562 	if (chip_rev >= 0x20)
1563 		slot->host->quirks |= SDHCI_QUIRK_FORCE_DMA;
1564 
1565 	writeb(SYSKT_POWER_330, slot->host->ioaddr + SYSKT_POWER_DATA);
1566 	writeb(SYSKT_POWER_START, slot->host->ioaddr + SYSKT_POWER_CMD);
1567 	udelay(50);
1568 	tm = 10;  /* Wait max 1 ms */
1569 	do {
1570 		ps = readw(slot->host->ioaddr + SYSKT_POWER_STATUS);
1571 		if (ps & SYSKT_POWER_STATUS_OK)
1572 			break;
1573 		udelay(100);
1574 	} while (--tm);
1575 	if (!tm) {
1576 		dev_err(&slot->chip->pdev->dev,
1577 			"power regulator never stabilized");
1578 		writeb(0, slot->host->ioaddr + SYSKT_POWER_CMD);
1579 		return -ENODEV;
1580 	}
1581 
1582 	return 0;
1583 }
1584 
1585 static const struct sdhci_pci_fixes sdhci_syskt = {
1586 	.quirks		= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER,
1587 	.probe		= syskt_probe,
1588 	.probe_slot	= syskt_probe_slot,
1589 };
1590 
via_probe(struct sdhci_pci_chip * chip)1591 static int via_probe(struct sdhci_pci_chip *chip)
1592 {
1593 	if (chip->pdev->revision == 0x10)
1594 		chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
1595 
1596 	return 0;
1597 }
1598 
1599 static const struct sdhci_pci_fixes sdhci_via = {
1600 	.probe		= via_probe,
1601 };
1602 
rtsx_probe_slot(struct sdhci_pci_slot * slot)1603 static int rtsx_probe_slot(struct sdhci_pci_slot *slot)
1604 {
1605 	slot->host->mmc->caps2 |= MMC_CAP2_HS200;
1606 	return 0;
1607 }
1608 
1609 static const struct sdhci_pci_fixes sdhci_rtsx = {
1610 	.quirks2	= SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
1611 			SDHCI_QUIRK2_BROKEN_64_BIT_DMA |
1612 			SDHCI_QUIRK2_BROKEN_DDR50,
1613 	.probe_slot	= rtsx_probe_slot,
1614 };
1615 
1616 /*AMD chipset generation*/
1617 enum amd_chipset_gen {
1618 	AMD_CHIPSET_BEFORE_ML,
1619 	AMD_CHIPSET_CZ,
1620 	AMD_CHIPSET_NL,
1621 	AMD_CHIPSET_UNKNOWN,
1622 };
1623 
1624 /* AMD registers */
1625 #define AMD_SD_AUTO_PATTERN		0xB8
1626 #define AMD_MSLEEP_DURATION		4
1627 #define AMD_SD_MISC_CONTROL		0xD0
1628 #define AMD_MAX_TUNE_VALUE		0x0B
1629 #define AMD_AUTO_TUNE_SEL		0x10800
1630 #define AMD_FIFO_PTR			0x30
1631 #define AMD_BIT_MASK			0x1F
1632 
amd_tuning_reset(struct sdhci_host * host)1633 static void amd_tuning_reset(struct sdhci_host *host)
1634 {
1635 	unsigned int val;
1636 
1637 	val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1638 	val |= SDHCI_CTRL_PRESET_VAL_ENABLE | SDHCI_CTRL_EXEC_TUNING;
1639 	sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
1640 
1641 	val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1642 	val &= ~SDHCI_CTRL_EXEC_TUNING;
1643 	sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
1644 }
1645 
amd_config_tuning_phase(struct pci_dev * pdev,u8 phase)1646 static void amd_config_tuning_phase(struct pci_dev *pdev, u8 phase)
1647 {
1648 	unsigned int val;
1649 
1650 	pci_read_config_dword(pdev, AMD_SD_AUTO_PATTERN, &val);
1651 	val &= ~AMD_BIT_MASK;
1652 	val |= (AMD_AUTO_TUNE_SEL | (phase << 1));
1653 	pci_write_config_dword(pdev, AMD_SD_AUTO_PATTERN, val);
1654 }
1655 
amd_enable_manual_tuning(struct pci_dev * pdev)1656 static void amd_enable_manual_tuning(struct pci_dev *pdev)
1657 {
1658 	unsigned int val;
1659 
1660 	pci_read_config_dword(pdev, AMD_SD_MISC_CONTROL, &val);
1661 	val |= AMD_FIFO_PTR;
1662 	pci_write_config_dword(pdev, AMD_SD_MISC_CONTROL, val);
1663 }
1664 
amd_execute_tuning_hs200(struct sdhci_host * host,u32 opcode)1665 static int amd_execute_tuning_hs200(struct sdhci_host *host, u32 opcode)
1666 {
1667 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1668 	struct pci_dev *pdev = slot->chip->pdev;
1669 	u8 valid_win = 0;
1670 	u8 valid_win_max = 0;
1671 	u8 valid_win_end = 0;
1672 	u8 ctrl, tune_around;
1673 
1674 	amd_tuning_reset(host);
1675 
1676 	for (tune_around = 0; tune_around < 12; tune_around++) {
1677 		amd_config_tuning_phase(pdev, tune_around);
1678 
1679 		if (mmc_send_tuning(host->mmc, opcode, NULL)) {
1680 			valid_win = 0;
1681 			msleep(AMD_MSLEEP_DURATION);
1682 			ctrl = SDHCI_RESET_CMD | SDHCI_RESET_DATA;
1683 			sdhci_writeb(host, ctrl, SDHCI_SOFTWARE_RESET);
1684 		} else if (++valid_win > valid_win_max) {
1685 			valid_win_max = valid_win;
1686 			valid_win_end = tune_around;
1687 		}
1688 	}
1689 
1690 	if (!valid_win_max) {
1691 		dev_err(&pdev->dev, "no tuning point found\n");
1692 		return -EIO;
1693 	}
1694 
1695 	amd_config_tuning_phase(pdev, valid_win_end - valid_win_max / 2);
1696 
1697 	amd_enable_manual_tuning(pdev);
1698 
1699 	host->mmc->retune_period = 0;
1700 
1701 	return 0;
1702 }
1703 
amd_execute_tuning(struct mmc_host * mmc,u32 opcode)1704 static int amd_execute_tuning(struct mmc_host *mmc, u32 opcode)
1705 {
1706 	struct sdhci_host *host = mmc_priv(mmc);
1707 
1708 	/* AMD requires custom HS200 tuning */
1709 	if (host->timing == MMC_TIMING_MMC_HS200)
1710 		return amd_execute_tuning_hs200(host, opcode);
1711 
1712 	/* Otherwise perform standard SDHCI tuning */
1713 	return sdhci_execute_tuning(mmc, opcode);
1714 }
1715 
amd_probe_slot(struct sdhci_pci_slot * slot)1716 static int amd_probe_slot(struct sdhci_pci_slot *slot)
1717 {
1718 	struct mmc_host_ops *ops = &slot->host->mmc_host_ops;
1719 
1720 	ops->execute_tuning = amd_execute_tuning;
1721 
1722 	return 0;
1723 }
1724 
amd_probe(struct sdhci_pci_chip * chip)1725 static int amd_probe(struct sdhci_pci_chip *chip)
1726 {
1727 	struct pci_dev	*smbus_dev;
1728 	enum amd_chipset_gen gen;
1729 
1730 	smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
1731 			PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
1732 	if (smbus_dev) {
1733 		gen = AMD_CHIPSET_BEFORE_ML;
1734 	} else {
1735 		smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
1736 				PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
1737 		if (smbus_dev) {
1738 			if (smbus_dev->revision < 0x51)
1739 				gen = AMD_CHIPSET_CZ;
1740 			else
1741 				gen = AMD_CHIPSET_NL;
1742 		} else {
1743 			gen = AMD_CHIPSET_UNKNOWN;
1744 		}
1745 	}
1746 
1747 	pci_dev_put(smbus_dev);
1748 
1749 	if (gen == AMD_CHIPSET_BEFORE_ML || gen == AMD_CHIPSET_CZ)
1750 		chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
1751 
1752 	return 0;
1753 }
1754 
sdhci_read_present_state(struct sdhci_host * host)1755 static u32 sdhci_read_present_state(struct sdhci_host *host)
1756 {
1757 	return sdhci_readl(host, SDHCI_PRESENT_STATE);
1758 }
1759 
amd_sdhci_reset(struct sdhci_host * host,u8 mask)1760 static void amd_sdhci_reset(struct sdhci_host *host, u8 mask)
1761 {
1762 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1763 	struct pci_dev *pdev = slot->chip->pdev;
1764 	u32 present_state;
1765 
1766 	/*
1767 	 * SDHC 0x7906 requires a hard reset to clear all internal state.
1768 	 * Otherwise it can get into a bad state where the DATA lines are always
1769 	 * read as zeros.
1770 	 */
1771 	if (pdev->device == 0x7906 && (mask & SDHCI_RESET_ALL)) {
1772 		pci_clear_master(pdev);
1773 
1774 		pci_save_state(pdev);
1775 
1776 		pci_set_power_state(pdev, PCI_D3cold);
1777 		pr_debug("%s: power_state=%u\n", mmc_hostname(host->mmc),
1778 			pdev->current_state);
1779 		pci_set_power_state(pdev, PCI_D0);
1780 
1781 		pci_restore_state(pdev);
1782 
1783 		/*
1784 		 * SDHCI_RESET_ALL says the card detect logic should not be
1785 		 * reset, but since we need to reset the entire controller
1786 		 * we should wait until the card detect logic has stabilized.
1787 		 *
1788 		 * This normally takes about 40ms.
1789 		 */
1790 		readx_poll_timeout(
1791 			sdhci_read_present_state,
1792 			host,
1793 			present_state,
1794 			present_state & SDHCI_CD_STABLE,
1795 			10000,
1796 			100000
1797 		);
1798 	}
1799 
1800 	return sdhci_reset(host, mask);
1801 }
1802 
1803 static const struct sdhci_ops amd_sdhci_pci_ops = {
1804 	.set_clock			= sdhci_set_clock,
1805 	.enable_dma			= sdhci_pci_enable_dma,
1806 	.set_bus_width			= sdhci_set_bus_width,
1807 	.reset				= amd_sdhci_reset,
1808 	.set_uhs_signaling		= sdhci_set_uhs_signaling,
1809 };
1810 
1811 static const struct sdhci_pci_fixes sdhci_amd = {
1812 	.probe		= amd_probe,
1813 	.ops		= &amd_sdhci_pci_ops,
1814 	.probe_slot	= amd_probe_slot,
1815 };
1816 
1817 static const struct pci_device_id pci_ids[] = {
1818 	SDHCI_PCI_DEVICE(RICOH, R5C822,  ricoh),
1819 	SDHCI_PCI_DEVICE(RICOH, R5C843,  ricoh_mmc),
1820 	SDHCI_PCI_DEVICE(RICOH, R5CE822, ricoh_mmc),
1821 	SDHCI_PCI_DEVICE(RICOH, R5CE823, ricoh_mmc),
1822 	SDHCI_PCI_DEVICE(ENE, CB712_SD,   ene_712),
1823 	SDHCI_PCI_DEVICE(ENE, CB712_SD_2, ene_712),
1824 	SDHCI_PCI_DEVICE(ENE, CB714_SD,   ene_714),
1825 	SDHCI_PCI_DEVICE(ENE, CB714_SD_2, ene_714),
1826 	SDHCI_PCI_DEVICE(MARVELL, 88ALP01_SD, cafe),
1827 	SDHCI_PCI_DEVICE(JMICRON, JMB38X_SD,  jmicron),
1828 	SDHCI_PCI_DEVICE(JMICRON, JMB38X_MMC, jmicron),
1829 	SDHCI_PCI_DEVICE(JMICRON, JMB388_SD,  jmicron),
1830 	SDHCI_PCI_DEVICE(JMICRON, JMB388_ESD, jmicron),
1831 	SDHCI_PCI_DEVICE(SYSKONNECT, 8000, syskt),
1832 	SDHCI_PCI_DEVICE(VIA, 95D0, via),
1833 	SDHCI_PCI_DEVICE(REALTEK, 5250, rtsx),
1834 	SDHCI_PCI_DEVICE(INTEL, QRK_SD,    intel_qrk),
1835 	SDHCI_PCI_DEVICE(INTEL, MRST_SD0,  intel_mrst_hc0),
1836 	SDHCI_PCI_DEVICE(INTEL, MRST_SD1,  intel_mrst_hc1_hc2),
1837 	SDHCI_PCI_DEVICE(INTEL, MRST_SD2,  intel_mrst_hc1_hc2),
1838 	SDHCI_PCI_DEVICE(INTEL, MFD_SD,    intel_mfd_sd),
1839 	SDHCI_PCI_DEVICE(INTEL, MFD_SDIO1, intel_mfd_sdio),
1840 	SDHCI_PCI_DEVICE(INTEL, MFD_SDIO2, intel_mfd_sdio),
1841 	SDHCI_PCI_DEVICE(INTEL, MFD_EMMC0, intel_mfd_emmc),
1842 	SDHCI_PCI_DEVICE(INTEL, MFD_EMMC1, intel_mfd_emmc),
1843 	SDHCI_PCI_DEVICE(INTEL, PCH_SDIO0, intel_pch_sdio),
1844 	SDHCI_PCI_DEVICE(INTEL, PCH_SDIO1, intel_pch_sdio),
1845 	SDHCI_PCI_DEVICE(INTEL, BYT_EMMC,  intel_byt_emmc),
1846 	SDHCI_PCI_SUBDEVICE(INTEL, BYT_SDIO, NI, 7884, ni_byt_sdio),
1847 	SDHCI_PCI_DEVICE(INTEL, BYT_SDIO,  intel_byt_sdio),
1848 	SDHCI_PCI_DEVICE(INTEL, BYT_SD,    intel_byt_sd),
1849 	SDHCI_PCI_DEVICE(INTEL, BYT_EMMC2, intel_byt_emmc),
1850 	SDHCI_PCI_DEVICE(INTEL, BSW_EMMC,  intel_byt_emmc),
1851 	SDHCI_PCI_DEVICE(INTEL, BSW_SDIO,  intel_byt_sdio),
1852 	SDHCI_PCI_DEVICE(INTEL, BSW_SD,    intel_byt_sd),
1853 	SDHCI_PCI_DEVICE(INTEL, CLV_SDIO0, intel_mfd_sd),
1854 	SDHCI_PCI_DEVICE(INTEL, CLV_SDIO1, intel_mfd_sdio),
1855 	SDHCI_PCI_DEVICE(INTEL, CLV_SDIO2, intel_mfd_sdio),
1856 	SDHCI_PCI_DEVICE(INTEL, CLV_EMMC0, intel_mfd_emmc),
1857 	SDHCI_PCI_DEVICE(INTEL, CLV_EMMC1, intel_mfd_emmc),
1858 	SDHCI_PCI_DEVICE(INTEL, MRFLD_MMC, intel_mrfld_mmc),
1859 	SDHCI_PCI_DEVICE(INTEL, SPT_EMMC,  intel_byt_emmc),
1860 	SDHCI_PCI_DEVICE(INTEL, SPT_SDIO,  intel_byt_sdio),
1861 	SDHCI_PCI_DEVICE(INTEL, SPT_SD,    intel_byt_sd),
1862 	SDHCI_PCI_DEVICE(INTEL, DNV_EMMC,  intel_byt_emmc),
1863 	SDHCI_PCI_DEVICE(INTEL, CDF_EMMC,  intel_glk_emmc),
1864 	SDHCI_PCI_DEVICE(INTEL, BXT_EMMC,  intel_byt_emmc),
1865 	SDHCI_PCI_DEVICE(INTEL, BXT_SDIO,  intel_byt_sdio),
1866 	SDHCI_PCI_DEVICE(INTEL, BXT_SD,    intel_byt_sd),
1867 	SDHCI_PCI_DEVICE(INTEL, BXTM_EMMC, intel_byt_emmc),
1868 	SDHCI_PCI_DEVICE(INTEL, BXTM_SDIO, intel_byt_sdio),
1869 	SDHCI_PCI_DEVICE(INTEL, BXTM_SD,   intel_byt_sd),
1870 	SDHCI_PCI_DEVICE(INTEL, APL_EMMC,  intel_byt_emmc),
1871 	SDHCI_PCI_DEVICE(INTEL, APL_SDIO,  intel_byt_sdio),
1872 	SDHCI_PCI_DEVICE(INTEL, APL_SD,    intel_byt_sd),
1873 	SDHCI_PCI_DEVICE(INTEL, GLK_EMMC,  intel_glk_emmc),
1874 	SDHCI_PCI_DEVICE(INTEL, GLK_SDIO,  intel_byt_sdio),
1875 	SDHCI_PCI_DEVICE(INTEL, GLK_SD,    intel_byt_sd),
1876 	SDHCI_PCI_DEVICE(INTEL, CNP_EMMC,  intel_glk_emmc),
1877 	SDHCI_PCI_DEVICE(INTEL, CNP_SD,    intel_byt_sd),
1878 	SDHCI_PCI_DEVICE(INTEL, CNPH_SD,   intel_byt_sd),
1879 	SDHCI_PCI_DEVICE(INTEL, ICP_EMMC,  intel_glk_emmc),
1880 	SDHCI_PCI_DEVICE(INTEL, ICP_SD,    intel_byt_sd),
1881 	SDHCI_PCI_DEVICE(INTEL, EHL_EMMC,  intel_glk_emmc),
1882 	SDHCI_PCI_DEVICE(INTEL, EHL_SD,    intel_byt_sd),
1883 	SDHCI_PCI_DEVICE(INTEL, CML_EMMC,  intel_glk_emmc),
1884 	SDHCI_PCI_DEVICE(INTEL, CML_SD,    intel_byt_sd),
1885 	SDHCI_PCI_DEVICE(INTEL, CMLH_SD,   intel_byt_sd),
1886 	SDHCI_PCI_DEVICE(INTEL, JSL_EMMC,  intel_glk_emmc),
1887 	SDHCI_PCI_DEVICE(INTEL, JSL_SD,    intel_byt_sd),
1888 	SDHCI_PCI_DEVICE(INTEL, LKF_EMMC,  intel_glk_emmc),
1889 	SDHCI_PCI_DEVICE(INTEL, LKF_SD,    intel_byt_sd),
1890 	SDHCI_PCI_DEVICE(INTEL, ADL_EMMC,  intel_glk_emmc),
1891 	SDHCI_PCI_DEVICE(O2, 8120,     o2),
1892 	SDHCI_PCI_DEVICE(O2, 8220,     o2),
1893 	SDHCI_PCI_DEVICE(O2, 8221,     o2),
1894 	SDHCI_PCI_DEVICE(O2, 8320,     o2),
1895 	SDHCI_PCI_DEVICE(O2, 8321,     o2),
1896 	SDHCI_PCI_DEVICE(O2, FUJIN2,   o2),
1897 	SDHCI_PCI_DEVICE(O2, SDS0,     o2),
1898 	SDHCI_PCI_DEVICE(O2, SDS1,     o2),
1899 	SDHCI_PCI_DEVICE(O2, SEABIRD0, o2),
1900 	SDHCI_PCI_DEVICE(O2, SEABIRD1, o2),
1901 	SDHCI_PCI_DEVICE(O2, GG8_9860, o2),
1902 	SDHCI_PCI_DEVICE(O2, GG8_9861, o2),
1903 	SDHCI_PCI_DEVICE(O2, GG8_9862, o2),
1904 	SDHCI_PCI_DEVICE(O2, GG8_9863, o2),
1905 	SDHCI_PCI_DEVICE(ARASAN, PHY_EMMC, arasan),
1906 	SDHCI_PCI_DEVICE(SYNOPSYS, DWC_MSHC, snps),
1907 	SDHCI_PCI_DEVICE(GLI, 9750, gl9750),
1908 	SDHCI_PCI_DEVICE(GLI, 9755, gl9755),
1909 	SDHCI_PCI_DEVICE(GLI, 9763E, gl9763e),
1910 	SDHCI_PCI_DEVICE(GLI, 9767, gl9767),
1911 	SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd),
1912 	/* Generic SD host controller */
1913 	{PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)},
1914 	{ /* end: all zeroes */ },
1915 };
1916 
1917 MODULE_DEVICE_TABLE(pci, pci_ids);
1918 
1919 /*****************************************************************************\
1920  *                                                                           *
1921  * SDHCI core callbacks                                                      *
1922  *                                                                           *
1923 \*****************************************************************************/
1924 
sdhci_pci_enable_dma(struct sdhci_host * host)1925 int sdhci_pci_enable_dma(struct sdhci_host *host)
1926 {
1927 	struct sdhci_pci_slot *slot;
1928 	struct pci_dev *pdev;
1929 
1930 	slot = sdhci_priv(host);
1931 	pdev = slot->chip->pdev;
1932 
1933 	if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
1934 		((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
1935 		(host->flags & SDHCI_USE_SDMA)) {
1936 		dev_warn(&pdev->dev, "Will use DMA mode even though HW "
1937 			"doesn't fully claim to support it.\n");
1938 	}
1939 
1940 	pci_set_master(pdev);
1941 
1942 	return 0;
1943 }
1944 
sdhci_pci_hw_reset(struct sdhci_host * host)1945 static void sdhci_pci_hw_reset(struct sdhci_host *host)
1946 {
1947 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1948 
1949 	if (slot->hw_reset)
1950 		slot->hw_reset(host);
1951 }
1952 
1953 static const struct sdhci_ops sdhci_pci_ops = {
1954 	.set_clock	= sdhci_set_clock,
1955 	.enable_dma	= sdhci_pci_enable_dma,
1956 	.set_bus_width	= sdhci_set_bus_width,
1957 	.reset		= sdhci_reset,
1958 	.set_uhs_signaling = sdhci_set_uhs_signaling,
1959 	.hw_reset		= sdhci_pci_hw_reset,
1960 };
1961 
1962 /*****************************************************************************\
1963  *                                                                           *
1964  * Suspend/resume                                                            *
1965  *                                                                           *
1966 \*****************************************************************************/
1967 
1968 #ifdef CONFIG_PM_SLEEP
sdhci_pci_suspend(struct device * dev)1969 static int sdhci_pci_suspend(struct device *dev)
1970 {
1971 	struct sdhci_pci_chip *chip = dev_get_drvdata(dev);
1972 
1973 	if (!chip)
1974 		return 0;
1975 
1976 	if (chip->fixes && chip->fixes->suspend)
1977 		return chip->fixes->suspend(chip);
1978 
1979 	return sdhci_pci_suspend_host(chip);
1980 }
1981 
sdhci_pci_resume(struct device * dev)1982 static int sdhci_pci_resume(struct device *dev)
1983 {
1984 	struct sdhci_pci_chip *chip = dev_get_drvdata(dev);
1985 
1986 	if (!chip)
1987 		return 0;
1988 
1989 	if (chip->fixes && chip->fixes->resume)
1990 		return chip->fixes->resume(chip);
1991 
1992 	return sdhci_pci_resume_host(chip);
1993 }
1994 #endif
1995 
1996 #ifdef CONFIG_PM
sdhci_pci_runtime_suspend(struct device * dev)1997 static int sdhci_pci_runtime_suspend(struct device *dev)
1998 {
1999 	struct sdhci_pci_chip *chip = dev_get_drvdata(dev);
2000 
2001 	if (!chip)
2002 		return 0;
2003 
2004 	if (chip->fixes && chip->fixes->runtime_suspend)
2005 		return chip->fixes->runtime_suspend(chip);
2006 
2007 	return sdhci_pci_runtime_suspend_host(chip);
2008 }
2009 
sdhci_pci_runtime_resume(struct device * dev)2010 static int sdhci_pci_runtime_resume(struct device *dev)
2011 {
2012 	struct sdhci_pci_chip *chip = dev_get_drvdata(dev);
2013 
2014 	if (!chip)
2015 		return 0;
2016 
2017 	if (chip->fixes && chip->fixes->runtime_resume)
2018 		return chip->fixes->runtime_resume(chip);
2019 
2020 	return sdhci_pci_runtime_resume_host(chip);
2021 }
2022 #endif
2023 
2024 static const struct dev_pm_ops sdhci_pci_pm_ops = {
2025 	SET_SYSTEM_SLEEP_PM_OPS(sdhci_pci_suspend, sdhci_pci_resume)
2026 	SET_RUNTIME_PM_OPS(sdhci_pci_runtime_suspend,
2027 			sdhci_pci_runtime_resume, NULL)
2028 };
2029 
2030 /*****************************************************************************\
2031  *                                                                           *
2032  * Device probing/removal                                                    *
2033  *                                                                           *
2034 \*****************************************************************************/
2035 
sdhci_pci_probe_slot(struct pci_dev * pdev,struct sdhci_pci_chip * chip,int first_bar,int slotno)2036 static struct sdhci_pci_slot *sdhci_pci_probe_slot(
2037 	struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
2038 	int slotno)
2039 {
2040 	struct sdhci_pci_slot *slot;
2041 	struct sdhci_host *host;
2042 	int ret, bar = first_bar + slotno;
2043 	size_t priv_size = chip->fixes ? chip->fixes->priv_size : 0;
2044 
2045 	if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
2046 		dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
2047 		return ERR_PTR(-ENODEV);
2048 	}
2049 
2050 	if (pci_resource_len(pdev, bar) < 0x100) {
2051 		dev_err(&pdev->dev, "Invalid iomem size. You may "
2052 			"experience problems.\n");
2053 	}
2054 
2055 	if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
2056 		dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
2057 		return ERR_PTR(-ENODEV);
2058 	}
2059 
2060 	if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
2061 		dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
2062 		return ERR_PTR(-ENODEV);
2063 	}
2064 
2065 	host = sdhci_alloc_host(&pdev->dev, sizeof(*slot) + priv_size);
2066 	if (IS_ERR(host)) {
2067 		dev_err(&pdev->dev, "cannot allocate host\n");
2068 		return ERR_CAST(host);
2069 	}
2070 
2071 	slot = sdhci_priv(host);
2072 
2073 	slot->chip = chip;
2074 	slot->host = host;
2075 	slot->cd_idx = -1;
2076 
2077 	host->hw_name = "PCI";
2078 	host->ops = chip->fixes && chip->fixes->ops ?
2079 		    chip->fixes->ops :
2080 		    &sdhci_pci_ops;
2081 	host->quirks = chip->quirks;
2082 	host->quirks2 = chip->quirks2;
2083 
2084 	host->irq = pdev->irq;
2085 
2086 	ret = pcim_iomap_regions(pdev, BIT(bar), mmc_hostname(host->mmc));
2087 	if (ret) {
2088 		dev_err(&pdev->dev, "cannot request region\n");
2089 		goto cleanup;
2090 	}
2091 
2092 	host->ioaddr = pcim_iomap_table(pdev)[bar];
2093 
2094 	if (chip->fixes && chip->fixes->probe_slot) {
2095 		ret = chip->fixes->probe_slot(slot);
2096 		if (ret)
2097 			goto cleanup;
2098 	}
2099 
2100 	host->mmc->pm_caps = MMC_PM_KEEP_POWER;
2101 	host->mmc->slotno = slotno;
2102 	host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
2103 
2104 	if (device_can_wakeup(&pdev->dev))
2105 		host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
2106 
2107 	if (host->mmc->caps & MMC_CAP_CD_WAKE)
2108 		device_init_wakeup(&pdev->dev, true);
2109 
2110 	if (slot->cd_idx >= 0) {
2111 		ret = mmc_gpiod_request_cd(host->mmc, "cd", slot->cd_idx,
2112 					   slot->cd_override_level, 0);
2113 		if (ret && ret != -EPROBE_DEFER)
2114 			ret = mmc_gpiod_request_cd(host->mmc, NULL,
2115 						   slot->cd_idx,
2116 						   slot->cd_override_level,
2117 						   0);
2118 		if (ret == -EPROBE_DEFER)
2119 			goto remove;
2120 
2121 		if (ret) {
2122 			dev_warn(&pdev->dev, "failed to setup card detect gpio\n");
2123 			slot->cd_idx = -1;
2124 		}
2125 	}
2126 
2127 	if (chip->fixes && chip->fixes->add_host)
2128 		ret = chip->fixes->add_host(slot);
2129 	else
2130 		ret = sdhci_add_host(host);
2131 	if (ret)
2132 		goto remove;
2133 
2134 	/*
2135 	 * Check if the chip needs a separate GPIO for card detect to wake up
2136 	 * from runtime suspend.  If it is not there, don't allow runtime PM.
2137 	 */
2138 	if (chip->fixes && chip->fixes->own_cd_for_runtime_pm && slot->cd_idx < 0)
2139 		chip->allow_runtime_pm = false;
2140 
2141 	return slot;
2142 
2143 remove:
2144 	if (chip->fixes && chip->fixes->remove_slot)
2145 		chip->fixes->remove_slot(slot, 0);
2146 
2147 cleanup:
2148 	sdhci_free_host(host);
2149 
2150 	return ERR_PTR(ret);
2151 }
2152 
sdhci_pci_remove_slot(struct sdhci_pci_slot * slot)2153 static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
2154 {
2155 	int dead;
2156 	u32 scratch;
2157 
2158 	dead = 0;
2159 	scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
2160 	if (scratch == (u32)-1)
2161 		dead = 1;
2162 
2163 	sdhci_remove_host(slot->host, dead);
2164 
2165 	if (slot->chip->fixes && slot->chip->fixes->remove_slot)
2166 		slot->chip->fixes->remove_slot(slot, dead);
2167 
2168 	sdhci_free_host(slot->host);
2169 }
2170 
sdhci_pci_runtime_pm_allow(struct device * dev)2171 static void sdhci_pci_runtime_pm_allow(struct device *dev)
2172 {
2173 	pm_suspend_ignore_children(dev, 1);
2174 	pm_runtime_set_autosuspend_delay(dev, 50);
2175 	pm_runtime_use_autosuspend(dev);
2176 	pm_runtime_allow(dev);
2177 	/* Stay active until mmc core scans for a card */
2178 	pm_runtime_put_noidle(dev);
2179 }
2180 
sdhci_pci_runtime_pm_forbid(struct device * dev)2181 static void sdhci_pci_runtime_pm_forbid(struct device *dev)
2182 {
2183 	pm_runtime_forbid(dev);
2184 	pm_runtime_get_noresume(dev);
2185 }
2186 
sdhci_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2187 static int sdhci_pci_probe(struct pci_dev *pdev,
2188 				     const struct pci_device_id *ent)
2189 {
2190 	struct sdhci_pci_chip *chip;
2191 	struct sdhci_pci_slot *slot;
2192 
2193 	u8 slots, first_bar;
2194 	int ret, i;
2195 
2196 	BUG_ON(pdev == NULL);
2197 	BUG_ON(ent == NULL);
2198 
2199 	dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
2200 		 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
2201 
2202 	ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
2203 	if (ret)
2204 		return ret;
2205 
2206 	slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
2207 	dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
2208 
2209 	BUG_ON(slots > MAX_SLOTS);
2210 
2211 	ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
2212 	if (ret)
2213 		return ret;
2214 
2215 	first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
2216 
2217 	if (first_bar > 5) {
2218 		dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
2219 		return -ENODEV;
2220 	}
2221 
2222 	ret = pcim_enable_device(pdev);
2223 	if (ret)
2224 		return ret;
2225 
2226 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
2227 	if (!chip)
2228 		return -ENOMEM;
2229 
2230 	chip->pdev = pdev;
2231 	chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
2232 	if (chip->fixes) {
2233 		chip->quirks = chip->fixes->quirks;
2234 		chip->quirks2 = chip->fixes->quirks2;
2235 		chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
2236 	}
2237 	chip->num_slots = slots;
2238 	chip->pm_retune = true;
2239 	chip->rpm_retune = true;
2240 
2241 	pci_set_drvdata(pdev, chip);
2242 
2243 	if (chip->fixes && chip->fixes->probe) {
2244 		ret = chip->fixes->probe(chip);
2245 		if (ret)
2246 			return ret;
2247 	}
2248 
2249 	slots = chip->num_slots;	/* Quirk may have changed this */
2250 
2251 	for (i = 0; i < slots; i++) {
2252 		slot = sdhci_pci_probe_slot(pdev, chip, first_bar, i);
2253 		if (IS_ERR(slot)) {
2254 			for (i--; i >= 0; i--)
2255 				sdhci_pci_remove_slot(chip->slots[i]);
2256 			return PTR_ERR(slot);
2257 		}
2258 
2259 		chip->slots[i] = slot;
2260 	}
2261 
2262 	if (chip->allow_runtime_pm)
2263 		sdhci_pci_runtime_pm_allow(&pdev->dev);
2264 
2265 	return 0;
2266 }
2267 
sdhci_pci_remove(struct pci_dev * pdev)2268 static void sdhci_pci_remove(struct pci_dev *pdev)
2269 {
2270 	int i;
2271 	struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
2272 
2273 	if (chip->allow_runtime_pm)
2274 		sdhci_pci_runtime_pm_forbid(&pdev->dev);
2275 
2276 	for (i = 0; i < chip->num_slots; i++)
2277 		sdhci_pci_remove_slot(chip->slots[i]);
2278 }
2279 
2280 static struct pci_driver sdhci_driver = {
2281 	.name =		"sdhci-pci",
2282 	.id_table =	pci_ids,
2283 	.probe =	sdhci_pci_probe,
2284 	.remove =	sdhci_pci_remove,
2285 	.driver =	{
2286 		.pm =   &sdhci_pci_pm_ops,
2287 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
2288 	},
2289 };
2290 
2291 module_pci_driver(sdhci_driver);
2292 
2293 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
2294 MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
2295 MODULE_LICENSE("GPL");
2296