1 // SPDX-License-Identifier: GPL-2.0-only
3 * Secure Digital Host Controller Interface ACPI driver.
5 * Copyright (c) 2012, Intel Corporation.
8 #include <linux/init.h>
9 #include <linux/export.h>
10 #include <linux/module.h>
11 #include <linux/device.h>
12 #include <linux/platform_device.h>
13 #include <linux/ioport.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/compiler.h>
17 #include <linux/stddef.h>
18 #include <linux/bitops.h>
19 #include <linux/types.h>
20 #include <linux/err.h>
21 #include <linux/interrupt.h>
22 #include <linux/acpi.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/delay.h>
26 #include <linux/dmi.h>
28 #include <linux/mmc/host.h>
29 #include <linux/mmc/pm.h>
30 #include <linux/mmc/slot-gpio.h>
33 #include <asm/cpu_device_id.h>
34 #include <asm/intel-family.h>
35 #include <asm/iosf_mbi.h>
36 #include <linux/pci.h>
42 SDHCI_ACPI_SD_CD = BIT(0),
43 SDHCI_ACPI_RUNTIME_PM = BIT(1),
44 SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
47 struct sdhci_acpi_chip {
48 const struct sdhci_ops *ops;
53 mmc_pm_flag_t pm_caps;
56 struct sdhci_acpi_slot {
57 const struct sdhci_acpi_chip *chip;
62 mmc_pm_flag_t pm_caps;
65 int (*probe_slot)(struct platform_device *, struct acpi_device *);
66 int (*remove_slot)(struct platform_device *);
67 int (*free_slot)(struct platform_device *pdev);
68 int (*setup_host)(struct platform_device *pdev);
71 struct sdhci_acpi_host {
72 struct sdhci_host *host;
73 const struct sdhci_acpi_slot *slot;
74 struct platform_device *pdev;
77 bool reset_signal_volt_on_suspend;
78 unsigned long private[0] ____cacheline_aligned;
82 DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP = BIT(0),
83 DMI_QUIRK_SD_NO_WRITE_PROTECT = BIT(1),
86 static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
88 return (void *)c->private;
91 static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
93 return c->slot && (c->slot->flags & flag);
96 #define INTEL_DSM_HS_CAPS_SDR25 BIT(0)
97 #define INTEL_DSM_HS_CAPS_DDR50 BIT(1)
98 #define INTEL_DSM_HS_CAPS_SDR50 BIT(2)
99 #define INTEL_DSM_HS_CAPS_SDR104 BIT(3)
103 INTEL_DSM_V18_SWITCH = 3,
104 INTEL_DSM_V33_SWITCH = 4,
105 INTEL_DSM_HS_CAPS = 8,
113 static const guid_t intel_dsm_guid =
114 GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
115 0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
117 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
118 unsigned int fn, u32 *result)
120 union acpi_object *obj;
123 obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
127 if (obj->type == ACPI_TYPE_INTEGER) {
128 *result = obj->integer.value;
129 } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
130 size_t len = min_t(size_t, obj->buffer.length, 4);
133 memcpy(result, obj->buffer.pointer, len);
135 dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
136 __func__, fn, obj->type, obj->buffer.length);
145 static int intel_dsm(struct intel_host *intel_host, struct device *dev,
146 unsigned int fn, u32 *result)
148 if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
151 return __intel_dsm(intel_host, dev, fn, result);
154 static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
155 struct mmc_host *mmc)
159 intel_host->hs_caps = ~0;
161 err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
163 pr_debug("%s: DSM not supported, error %d\n",
164 mmc_hostname(mmc), err);
168 pr_debug("%s: DSM function mask %#x\n",
169 mmc_hostname(mmc), intel_host->dsm_fns);
171 intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
174 static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
177 struct device *dev = mmc_dev(mmc);
178 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
179 struct intel_host *intel_host = sdhci_acpi_priv(c);
184 err = sdhci_start_signal_voltage_switch(mmc, ios);
188 switch (ios->signal_voltage) {
189 case MMC_SIGNAL_VOLTAGE_330:
190 fn = INTEL_DSM_V33_SWITCH;
192 case MMC_SIGNAL_VOLTAGE_180:
193 fn = INTEL_DSM_V18_SWITCH;
199 err = intel_dsm(intel_host, dev, fn, &result);
200 pr_debug("%s: %s DSM fn %u error %d result %u\n",
201 mmc_hostname(mmc), __func__, fn, err, result);
206 static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
210 reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
212 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
213 /* For eMMC, minimum is 1us but give it 9us for good measure */
216 sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
217 /* For eMMC, minimum is 200us but give it 300us for good measure */
218 usleep_range(300, 1000);
221 static const struct sdhci_ops sdhci_acpi_ops_dflt = {
222 .set_clock = sdhci_set_clock,
223 .set_bus_width = sdhci_set_bus_width,
224 .reset = sdhci_reset,
225 .set_uhs_signaling = sdhci_set_uhs_signaling,
228 static const struct sdhci_ops sdhci_acpi_ops_int = {
229 .set_clock = sdhci_set_clock,
230 .set_bus_width = sdhci_set_bus_width,
231 .reset = sdhci_reset,
232 .set_uhs_signaling = sdhci_set_uhs_signaling,
233 .hw_reset = sdhci_acpi_int_hw_reset,
236 static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
237 .ops = &sdhci_acpi_ops_int,
242 static bool sdhci_acpi_byt(void)
244 static const struct x86_cpu_id byt[] = {
245 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT },
249 return x86_match_cpu(byt);
252 static bool sdhci_acpi_cht(void)
254 static const struct x86_cpu_id cht[] = {
255 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT },
259 return x86_match_cpu(cht);
262 #define BYT_IOSF_SCCEP 0x63
263 #define BYT_IOSF_OCP_NETCTRL0 0x1078
264 #define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
266 static void sdhci_acpi_byt_setting(struct device *dev)
270 if (!sdhci_acpi_byt())
273 if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
275 dev_err(dev, "%s read error\n", __func__);
279 if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
282 val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
284 if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
286 dev_err(dev, "%s write error\n", __func__);
290 dev_dbg(dev, "%s completed\n", __func__);
293 static bool sdhci_acpi_byt_defer(struct device *dev)
295 if (!sdhci_acpi_byt())
298 if (!iosf_mbi_available())
301 sdhci_acpi_byt_setting(dev);
306 static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
307 unsigned int slot, unsigned int parent_slot)
309 struct pci_dev *dev, *parent, *from = NULL;
312 dev = pci_get_device(vendor, device, from);
316 parent = pci_upstream_bridge(dev);
317 if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
318 parent && PCI_SLOT(parent->devfn) == parent_slot &&
319 !pci_upstream_bridge(parent)) {
330 * GPDwin uses PCI wifi which conflicts with SDIO's use of
331 * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
332 * problematic, but since SDIO is only used for wifi, the presence of the PCI
333 * wifi card in the expected slot with an ACPI companion node, is used to
334 * indicate that acpi_device_fix_up_power() should be avoided.
336 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
338 return sdhci_acpi_cht() &&
339 acpi_dev_hid_uid_match(adev, "80860F14", "2") &&
340 sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
345 static inline void sdhci_acpi_byt_setting(struct device *dev)
349 static inline bool sdhci_acpi_byt_defer(struct device *dev)
354 static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
361 static int bxt_get_cd(struct mmc_host *mmc)
363 int gpio_cd = mmc_gpio_get_cd(mmc);
364 struct sdhci_host *host = mmc_priv(mmc);
371 spin_lock_irqsave(&host->lock, flags);
373 if (host->flags & SDHCI_DEVICE_DEAD)
376 ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
378 spin_unlock_irqrestore(&host->lock, flags);
383 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
385 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
386 struct intel_host *intel_host = sdhci_acpi_priv(c);
387 struct sdhci_host *host = c->host;
389 if (acpi_dev_hid_uid_match(adev, "80860F14", "1") &&
390 sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
391 sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
392 host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
394 if (acpi_dev_hid_uid_match(adev, "80865ACA", NULL))
395 host->mmc_host_ops.get_cd = bxt_get_cd;
397 intel_dsm_init(intel_host, &pdev->dev, host->mmc);
399 host->mmc_host_ops.start_signal_voltage_switch =
400 intel_start_signal_voltage_switch;
407 static int intel_setup_host(struct platform_device *pdev)
409 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
410 struct intel_host *intel_host = sdhci_acpi_priv(c);
412 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
413 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
415 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
416 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
418 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
419 c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
421 if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
422 c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
427 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
428 .chip = &sdhci_acpi_chip_int,
429 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
430 MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
431 MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
432 .flags = SDHCI_ACPI_RUNTIME_PM,
433 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
435 .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
436 SDHCI_QUIRK2_STOP_WITH_TC |
437 SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
438 .probe_slot = intel_probe_slot,
439 .setup_host = intel_setup_host,
440 .priv_size = sizeof(struct intel_host),
443 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
444 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
446 SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
447 .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
448 .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
449 MMC_CAP_WAIT_WHILE_BUSY,
450 .flags = SDHCI_ACPI_RUNTIME_PM,
451 .pm_caps = MMC_PM_KEEP_POWER,
452 .probe_slot = intel_probe_slot,
453 .setup_host = intel_setup_host,
454 .priv_size = sizeof(struct intel_host),
457 static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
458 .flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
459 SDHCI_ACPI_RUNTIME_PM,
460 .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
462 .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
463 SDHCI_QUIRK2_STOP_WITH_TC,
464 .caps = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
465 .probe_slot = intel_probe_slot,
466 .setup_host = intel_setup_host,
467 .priv_size = sizeof(struct intel_host),
470 #define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG 0x1a8
471 #define VENDOR_SPECIFIC_PWRCTL_CTL_REG 0x1ac
472 static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr)
474 struct sdhci_host *host = ptr;
476 sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG);
477 sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG);
482 static int qcom_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
484 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
485 struct sdhci_host *host = c->host;
486 int *irq = sdhci_acpi_priv(c);
490 if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
493 *irq = platform_get_irq(pdev, 1);
497 return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler,
498 IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
502 static int qcom_free_slot(struct platform_device *pdev)
504 struct device *dev = &pdev->dev;
505 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
506 struct sdhci_host *host = c->host;
507 struct acpi_device *adev;
508 int *irq = sdhci_acpi_priv(c);
510 adev = ACPI_COMPANION(dev);
514 if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
520 free_irq(*irq, host);
524 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
525 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
526 .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
527 .caps = MMC_CAP_NONREMOVABLE,
528 .priv_size = sizeof(int),
529 .probe_slot = qcom_probe_slot,
530 .free_slot = qcom_free_slot,
533 static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
534 .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
535 .caps = MMC_CAP_NONREMOVABLE,
538 /* AMD sdhci reset dll register. */
539 #define SDHCI_AMD_RESET_DLL_REGISTER 0x908
541 static int amd_select_drive_strength(struct mmc_card *card,
542 unsigned int max_dtr, int host_drv,
543 int card_drv, int *drv_type)
545 return MMC_SET_DRIVER_TYPE_A;
548 static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
550 /* AMD Platform requires dll setting */
551 sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
552 usleep_range(10, 20);
553 sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
557 * For AMD Platform it is required to disable the tuning
558 * bit first controller to bring to HS Mode from HS200
559 * mode, later enable to tune to HS400 mode.
561 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
563 struct sdhci_host *host = mmc_priv(mmc);
564 unsigned int old_timing = host->timing;
566 sdhci_set_ios(mmc, ios);
567 if (old_timing == MMC_TIMING_MMC_HS200 &&
568 ios->timing == MMC_TIMING_MMC_HS)
569 sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
570 if (old_timing != MMC_TIMING_MMC_HS400 &&
571 ios->timing == MMC_TIMING_MMC_HS400) {
572 sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
573 sdhci_acpi_amd_hs400_dll(host);
577 static const struct sdhci_ops sdhci_acpi_ops_amd = {
578 .set_clock = sdhci_set_clock,
579 .set_bus_width = sdhci_set_bus_width,
580 .reset = sdhci_reset,
581 .set_uhs_signaling = sdhci_set_uhs_signaling,
584 static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
585 .ops = &sdhci_acpi_ops_amd,
588 static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
589 struct acpi_device *adev)
591 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
592 struct sdhci_host *host = c->host;
594 sdhci_read_caps(host);
595 if (host->caps1 & SDHCI_SUPPORT_DDR50)
596 host->mmc->caps = MMC_CAP_1_8V_DDR;
598 if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
599 (host->mmc->caps & MMC_CAP_1_8V_DDR))
600 host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
602 host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
603 host->mmc_host_ops.set_ios = amd_set_ios;
607 static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
608 .chip = &sdhci_acpi_chip_amd,
609 .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
610 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE |
611 SDHCI_QUIRK_32BIT_ADMA_SIZE,
612 .probe_slot = sdhci_acpi_emmc_amd_probe_slot,
615 struct sdhci_acpi_uid_slot {
618 const struct sdhci_acpi_slot *slot;
621 static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
622 { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
623 { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
624 { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
625 { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
626 { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
627 { "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
628 { "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
629 { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
630 { "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
631 { "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
632 { "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
633 { "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
634 { "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
636 { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
637 { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
638 { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
642 static const struct acpi_device_id sdhci_acpi_ids[] = {
658 MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
660 static const struct dmi_system_id sdhci_acpi_quirks[] = {
663 * The Lenovo Miix 320-10ICR has a bug in the _PS0 method of
664 * the SHC1 ACPI device, this bug causes it to reprogram the
665 * wrong LDO (DLDO3) to 1.8V if 1.8V modes are used and the
666 * card is (runtime) suspended + resumed. DLDO3 is used for
667 * the LCD and setting it to 1.8V causes the LCD to go black.
670 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
671 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
673 .driver_data = (void *)DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP,
677 * The Acer Aspire Switch 10 (SW5-012) microSD slot always
678 * reports the card being write-protected even though microSD
679 * cards do not have a write-protect switch at all.
682 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
683 DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"),
685 .driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT,
687 {} /* Terminating entry */
690 static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(struct acpi_device *adev)
692 const struct sdhci_acpi_uid_slot *u;
694 for (u = sdhci_acpi_uids; u->hid; u++) {
695 if (acpi_dev_hid_uid_match(adev, u->hid, u->uid))
701 static int sdhci_acpi_probe(struct platform_device *pdev)
703 struct device *dev = &pdev->dev;
704 const struct sdhci_acpi_slot *slot;
705 struct acpi_device *device, *child;
706 const struct dmi_system_id *id;
707 struct sdhci_acpi_host *c;
708 struct sdhci_host *host;
709 struct resource *iomem;
715 device = ACPI_COMPANION(dev);
719 id = dmi_first_match(sdhci_acpi_quirks);
721 quirks = (long)id->driver_data;
723 slot = sdhci_acpi_get_slot(device);
725 /* Power on the SDHCI controller and its children */
726 acpi_device_fix_up_power(device);
727 if (!sdhci_acpi_no_fixup_child_power(device)) {
728 list_for_each_entry(child, &device->children, node)
729 if (child->status.present && child->status.enabled)
730 acpi_device_fix_up_power(child);
733 if (sdhci_acpi_byt_defer(dev))
734 return -EPROBE_DEFER;
736 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
740 len = resource_size(iomem);
742 dev_err(dev, "Invalid iomem size!\n");
744 if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
747 priv_size = slot ? slot->priv_size : 0;
748 host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
750 return PTR_ERR(host);
752 c = sdhci_priv(host);
756 c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
758 platform_set_drvdata(pdev, c);
760 host->hw_name = "ACPI";
761 host->ops = &sdhci_acpi_ops_dflt;
762 host->irq = platform_get_irq(pdev, 0);
768 host->ioaddr = devm_ioremap(dev, iomem->start,
769 resource_size(iomem));
770 if (host->ioaddr == NULL) {
776 if (c->slot->probe_slot) {
777 err = c->slot->probe_slot(pdev, device);
782 host->ops = c->slot->chip->ops;
783 host->quirks |= c->slot->chip->quirks;
784 host->quirks2 |= c->slot->chip->quirks2;
785 host->mmc->caps |= c->slot->chip->caps;
786 host->mmc->caps2 |= c->slot->chip->caps2;
787 host->mmc->pm_caps |= c->slot->chip->pm_caps;
789 host->quirks |= c->slot->quirks;
790 host->quirks2 |= c->slot->quirks2;
791 host->mmc->caps |= c->slot->caps;
792 host->mmc->caps2 |= c->slot->caps2;
793 host->mmc->pm_caps |= c->slot->pm_caps;
796 host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
798 if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
799 bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
801 err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0);
803 if (err == -EPROBE_DEFER)
805 dev_warn(dev, "failed to setup card detect gpio\n");
806 c->use_runtime_pm = false;
809 if (quirks & DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP)
810 c->reset_signal_volt_on_suspend = true;
812 if (quirks & DMI_QUIRK_SD_NO_WRITE_PROTECT)
813 host->mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
816 err = sdhci_setup_host(host);
820 if (c->slot && c->slot->setup_host) {
821 err = c->slot->setup_host(pdev);
826 err = __sdhci_add_host(host);
830 if (c->use_runtime_pm) {
831 pm_runtime_set_active(dev);
832 pm_suspend_ignore_children(dev, 1);
833 pm_runtime_set_autosuspend_delay(dev, 50);
834 pm_runtime_use_autosuspend(dev);
835 pm_runtime_enable(dev);
838 device_enable_async_suspend(dev);
843 sdhci_cleanup_host(c->host);
845 if (c->slot && c->slot->free_slot)
846 c->slot->free_slot(pdev);
848 sdhci_free_host(c->host);
852 static int sdhci_acpi_remove(struct platform_device *pdev)
854 struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
855 struct device *dev = &pdev->dev;
858 if (c->use_runtime_pm) {
859 pm_runtime_get_sync(dev);
860 pm_runtime_disable(dev);
861 pm_runtime_put_noidle(dev);
864 if (c->slot && c->slot->remove_slot)
865 c->slot->remove_slot(pdev);
867 dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
868 sdhci_remove_host(c->host, dead);
870 if (c->slot && c->slot->free_slot)
871 c->slot->free_slot(pdev);
873 sdhci_free_host(c->host);
878 static void __maybe_unused sdhci_acpi_reset_signal_voltage_if_needed(
881 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
882 struct sdhci_host *host = c->host;
884 if (c->is_intel && c->reset_signal_volt_on_suspend &&
885 host->mmc->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_330) {
886 struct intel_host *intel_host = sdhci_acpi_priv(c);
887 unsigned int fn = INTEL_DSM_V33_SWITCH;
890 intel_dsm(intel_host, dev, fn, &result);
894 #ifdef CONFIG_PM_SLEEP
896 static int sdhci_acpi_suspend(struct device *dev)
898 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
899 struct sdhci_host *host = c->host;
902 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
903 mmc_retune_needed(host->mmc);
905 ret = sdhci_suspend_host(host);
909 sdhci_acpi_reset_signal_voltage_if_needed(dev);
913 static int sdhci_acpi_resume(struct device *dev)
915 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
917 sdhci_acpi_byt_setting(&c->pdev->dev);
919 return sdhci_resume_host(c->host);
926 static int sdhci_acpi_runtime_suspend(struct device *dev)
928 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
929 struct sdhci_host *host = c->host;
932 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
933 mmc_retune_needed(host->mmc);
935 ret = sdhci_runtime_suspend_host(host);
939 sdhci_acpi_reset_signal_voltage_if_needed(dev);
943 static int sdhci_acpi_runtime_resume(struct device *dev)
945 struct sdhci_acpi_host *c = dev_get_drvdata(dev);
947 sdhci_acpi_byt_setting(&c->pdev->dev);
949 return sdhci_runtime_resume_host(c->host, 0);
954 static const struct dev_pm_ops sdhci_acpi_pm_ops = {
955 SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
956 SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
957 sdhci_acpi_runtime_resume, NULL)
960 static struct platform_driver sdhci_acpi_driver = {
962 .name = "sdhci-acpi",
963 .acpi_match_table = sdhci_acpi_ids,
964 .pm = &sdhci_acpi_pm_ops,
966 .probe = sdhci_acpi_probe,
967 .remove = sdhci_acpi_remove,
970 module_platform_driver(sdhci_acpi_driver);
972 MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
973 MODULE_AUTHOR("Adrian Hunter");
974 MODULE_LICENSE("GPL v2");