Merge tag 'mmc-v3.18-1' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Fix SDIO IRQ bug
   - MMC regulator improvements
   - Fix slot-gpio card detect bug
   - Add support for Driver Stage Register
   - Convert the common MMC OF parser to use GPIO descriptors
   - Convert MMC_CAP2_NO_MULTI_READ into a callback, ->multi_io_quirk()
   - Some additional minor fixes

  MMC host:
   - mmci: Support Qualcomm specific DML layer for DMA
   - dw_mmc: Use common MMC regulators
   - dw_mmc: Add support for Rock-chips RK3288
   - tmio: Enable runtime PM support
   - tmio: Add support for R-Car Gen2 SoCs
   - tmio: Several fixes and improvements
   - omap_hsmmc: Removed Balaji from MAINTAINERS
   - jz4740: add DMA and pre/post support
   - sdhci: Add support for Intel Braswell
   - sdhci: Several fixes and improvements"

* tag 'mmc-v3.18-1' of git://git.linaro.org/people/ulf.hansson/mmc: (119 commits)
  ARM: dts: fix MMC2 regulators for Exynos5420 Arndale Octa board
  mmc: sdhci-acpi: Fix Braswell eMMC timeout clock frequency
  mmc: sdhci-acpi: Pass HID and UID to probe_slot
  mmc: sdhci-acpi: Get UID directly from acpi_device
  mmc, sdhci, bcm-kona, LLVMLinux: Remove use of __initconst
  mmc: sdhci-pci: Fix Braswell eMMC timeout clock frequency
  mmc: sdhci: Let a driver override timeout clock frequency
  mmc: sdhci-pci: Add Bay Trail and Braswell SD card detect
  mmc: sdhci-pci: Set SDHCI_QUIRK2_STOP_WITH_TC for Intel BYT host controllers
  mmc: sdhci-acpi: Add a HID and UID for a SD Card host controller
  mmc: sdhci-acpi: Set SDHCI_QUIRK2_STOP_WITH_TC for Intel host controllers
  mmc: sdhci: Add quirk for always getting TC with stop cmd
  mmc: core: restore detect line inversion semantics
  mmc: Fix incorrect warning when setting 0 Hz via debugfs
  mmc: Fix use of wrong device in mmc_gpiod_free_cd()
  mmc: atmel-mci: fix mismatched section on atmci_cleanup_slot
  mmc: rtsx_pci: Set power related cap2 macros
  mmc: core: Add new power_mode MMC_POWER_UNDEFINED
  mmc: sdhci: execute tuning when device is not busy
  mmc: atmel-mci: Release mmc resources on failure in probe
  ..

10 files changed, 371 insertions, 206 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index d03a080..f26a5f1 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -433,8 +433,8 @@ static void mmc_wait_for_req_done(struct mmc_host *host,
 		 */
 		if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
 			if (!mmc_interrupt_hpi(host->card)) {
-				pr_warning("%s: %s: Interrupted sanitize\n",
-					   mmc_hostname(host), __func__);
+				pr_warn("%s: %s: Interrupted sanitize\n",
+					mmc_hostname(host), __func__);
 				cmd->error = 0;
 				break;
 			} else {
@@ -995,7 +995,7 @@ void mmc_set_chip_select(struct mmc_host *host, int mode)
  */
 static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
 {
-	WARN_ON(hz < host->f_min);
+	WARN_ON(hz && hz < host->f_min);
 
 	if (hz > host->f_max)
 		hz = host->f_max;
@@ -1221,15 +1221,14 @@ int mmc_regulator_get_ocrmask(struct regulator *supply)
 	int			result = 0;
 	int			count;
 	int			i;
+	int			vdd_uV;
+	int			vdd_mV;
 
 	count = regulator_count_voltages(supply);
 	if (count < 0)
 		return count;
 
 	for (i = 0; i < count; i++) {
-		int		vdd_uV;
-		int		vdd_mV;
-
 		vdd_uV = regulator_list_voltage(supply, i);
 		if (vdd_uV <= 0)
 			continue;
@@ -1238,6 +1237,15 @@ int mmc_regulator_get_ocrmask(struct regulator *supply)
 		result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
 	}
 
+	if (!result) {
+		vdd_uV = regulator_get_voltage(supply);
+		if (vdd_uV <= 0)
+			return vdd_uV;
+
+		vdd_mV = vdd_uV / 1000;
+		result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
+	}
+
 	return result;
 }
 EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask);
@@ -1263,7 +1271,6 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
 
 	if (vdd_bit) {
 		int		tmp;
-		int		voltage;
 
 		/*
 		 * REVISIT mmc_vddrange_to_ocrmask() may have set some
@@ -1280,22 +1287,7 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
 			max_uV = min_uV + 100 * 1000;
 		}
 
-		/*
-		 * If we're using a fixed/static regulator, don't call
-		 * regulator_set_voltage; it would fail.
-		 */
-		voltage = regulator_get_voltage(supply);
-
-		if (!regulator_can_change_voltage(supply))
-			min_uV = max_uV = voltage;
-
-		if (voltage < 0)
-			result = voltage;
-		else if (voltage < min_uV || voltage > max_uV)
-			result = regulator_set_voltage(supply, min_uV, max_uV);
-		else
-			result = 0;
-
+		result = regulator_set_voltage(supply, min_uV, max_uV);
 		if (result == 0 && !mmc->regulator_enabled) {
 			result = regulator_enable(supply);
 			if (!result)
@@ -1425,8 +1417,8 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr)
 	if (!host->ops->start_signal_voltage_switch)
 		return -EPERM;
 	if (!host->ops->card_busy)
-		pr_warning("%s: cannot verify signal voltage switch\n",
-				mmc_hostname(host));
+		pr_warn("%s: cannot verify signal voltage switch\n",
+			mmc_hostname(host));
 
 	cmd.opcode = SD_SWITCH_VOLTAGE;
 	cmd.arg = 0;
@@ -1761,7 +1753,7 @@ void mmc_init_erase(struct mmc_card *card)
 		card->erase_shift = ffs(card->ssr.au) - 1;
 	} else if (card->ext_csd.hc_erase_size) {
 		card->pref_erase = card->ext_csd.hc_erase_size;
-	} else {
+	} else if (card->erase_size) {
 		sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11;
 		if (sz < 128)
 			card->pref_erase = 512 * 1024 / 512;
@@ -1778,7 +1770,8 @@ void mmc_init_erase(struct mmc_card *card)
 			if (sz)
 				card->pref_erase += card->erase_size - sz;
 		}
-	}
+	} else
+		card->pref_erase = 0;
 }
 
 static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
@@ -2489,6 +2482,7 @@ void mmc_start_host(struct mmc_host *host)
 {
 	host->f_init = max(freqs[0], host->f_min);
 	host->rescan_disable = 0;
+	host->ios.power_mode = MMC_POWER_UNDEFINED;
 	if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)
 		mmc_power_off(host);
 	else
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 95cceae..03c53b7 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -310,9 +310,8 @@ int mmc_of_parse(struct mmc_host *host)
 {
 	struct device_node *np;
 	u32 bus_width;
-	bool explicit_inv_wp, gpio_inv_wp = false;
-	enum of_gpio_flags flags;
-	int len, ret, gpio;
+	int len, ret;
+	bool cap_invert, gpio_invert;
 
 	if (!host->parent || !host->parent->of_node)
 		return 0;
@@ -360,59 +359,62 @@ int mmc_of_parse(struct mmc_host *host)
 	if (of_find_property(np, "non-removable", &len)) {
 		host->caps |= MMC_CAP_NONREMOVABLE;
 	} else {
-		bool explicit_inv_cd, gpio_inv_cd = false;
-
-		explicit_inv_cd = of_property_read_bool(np, "cd-inverted");
+		if (of_property_read_bool(np, "cd-inverted"))
+			cap_invert = true;
+		else
+			cap_invert = false;
 
 		if (of_find_property(np, "broken-cd", &len))
 			host->caps |= MMC_CAP_NEEDS_POLL;
 
-		gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags);
-		if (gpio == -EPROBE_DEFER)
-			return gpio;
-		if (gpio_is_valid(gpio)) {
-			if (!(flags & OF_GPIO_ACTIVE_LOW))
-				gpio_inv_cd = true;
-
-			ret = mmc_gpio_request_cd(host, gpio, 0);
-			if (ret < 0) {
-				dev_err(host->parent,
-					"Failed to request CD GPIO #%d: %d!\n",
-					gpio, ret);
+		ret = mmc_gpiod_request_cd(host, "cd", 0, true,
+					   0, &gpio_invert);
+		if (ret) {
+			if (ret == -EPROBE_DEFER)
 				return ret;
-			} else {
-				dev_info(host->parent, "Got CD GPIO #%d.\n",
-					 gpio);
+			if (ret != -ENOENT) {
+				dev_err(host->parent,
+					"Failed to request CD GPIO: %d\n",
+					ret);
 			}
-		}
-
-		if (explicit_inv_cd ^ gpio_inv_cd)
+		} else
+			dev_info(host->parent, "Got CD GPIO\n");
+
+		/*
+		 * There are two ways to flag that the CD line is inverted:
+		 * through the cd-inverted flag and by the GPIO line itself
+		 * being inverted from the GPIO subsystem. This is a leftover
+		 * from the times when the GPIO subsystem did not make it
+		 * possible to flag a line as inverted.
+		 *
+		 * If the capability on the host AND the GPIO line are
+		 * both inverted, the end result is that the CD line is
+		 * not inverted.
+		 */
+		if (cap_invert ^ gpio_invert)
 			host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
 	}
 
 	/* Parse Write Protection */
-	explicit_inv_wp = of_property_read_bool(np, "wp-inverted");
-
-	gpio = of_get_named_gpio_flags(np, "wp-gpios", 0, &flags);
-	if (gpio == -EPROBE_DEFER) {
-		ret = -EPROBE_DEFER;
-		goto out;
-	}
-	if (gpio_is_valid(gpio)) {
-		if (!(flags & OF_GPIO_ACTIVE_LOW))
-			gpio_inv_wp = true;
+	if (of_property_read_bool(np, "wp-inverted"))
+		cap_invert = true;
+	else
+		cap_invert = false;
 
-		ret = mmc_gpio_request_ro(host, gpio);
-		if (ret < 0) {
-			dev_err(host->parent,
-				"Failed to request WP GPIO: %d!\n", ret);
+	ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &gpio_invert);
+	if (ret) {
+		if (ret == -EPROBE_DEFER)
 			goto out;
-		} else {
-				dev_info(host->parent, "Got WP GPIO #%d.\n",
-					 gpio);
+		if (ret != -ENOENT) {
+			dev_err(host->parent,
+				"Failed to request WP GPIO: %d\n",
+				ret);
 		}
-	}
-	if (explicit_inv_wp ^ gpio_inv_wp)
+	} else
+		dev_info(host->parent, "Got WP GPIO\n");
+
+	/* See the comment on CD inversion above */
+	if (cap_invert ^ gpio_invert)
 		host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
 
 	if (of_find_property(np, "cap-sd-highspeed", &len))
@@ -452,6 +454,14 @@ int mmc_of_parse(struct mmc_host *host)
 	if (of_find_property(np, "mmc-hs400-1_2v", &len))
 		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
 
+	host->dsr_req = !of_property_read_u32(np, "dsr", &host->dsr);
+	if (host->dsr_req && (host->dsr & ~0xffff)) {
+		dev_err(host->parent,
+			"device tree specified broken value for DSR: 0x%x, ignoring\n",
+			host->dsr);
+		host->dsr_req = 0;
+	}
+
 	return 0;
 
 out:
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 1eda8dd..a301a78 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -162,6 +162,7 @@ static int mmc_decode_csd(struct mmc_card *card)
 	csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 	csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 	csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+	csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
 	csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 	csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 	csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
@@ -225,9 +226,7 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
 				"Card will be ignored.\n",
 				mmc_hostname(card->host));
 		} else {
-			pr_warning("%s: unable to read "
-				"EXT_CSD, performance might "
-				"suffer.\n",
+			pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
 				mmc_hostname(card->host));
 			err = 0;
 		}
@@ -298,6 +297,97 @@ static void mmc_select_card_type(struct mmc_card *card)
 	card->mmc_avail_type = avail_type;
 }
 
+static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
+{
+	u8 hc_erase_grp_sz, hc_wp_grp_sz;
+
+	/*
+	 * Disable these attributes by default
+	 */
+	card->ext_csd.enhanced_area_offset = -EINVAL;
+	card->ext_csd.enhanced_area_size = -EINVAL;
+
+	/*
+	 * Enhanced area feature support -- check whether the eMMC
+	 * card has the Enhanced area enabled.  If so, export enhanced
+	 * area offset and size to user by adding sysfs interface.
+	 */
+	if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
+	    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
+		if (card->ext_csd.partition_setting_completed) {
+			hc_erase_grp_sz =
+				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+			hc_wp_grp_sz =
+				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+			/*
+			 * calculate the enhanced data area offset, in bytes
+			 */
+			card->ext_csd.enhanced_area_offset =
+				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
+				(ext_csd[137] << 8) + ext_csd[136];
+			if (mmc_card_blockaddr(card))
+				card->ext_csd.enhanced_area_offset <<= 9;
+			/*
+			 * calculate the enhanced data area size, in kilobytes
+			 */
+			card->ext_csd.enhanced_area_size =
+				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
+				ext_csd[140];
+			card->ext_csd.enhanced_area_size *=
+				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+			card->ext_csd.enhanced_area_size <<= 9;
+		} else {
+			pr_warn("%s: defines enhanced area without partition setting complete\n",
+				mmc_hostname(card->host));
+		}
+	}
+}
+
+static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
+{
+	int idx;
+	u8 hc_erase_grp_sz, hc_wp_grp_sz;
+	unsigned int part_size;
+
+	/*
+	 * General purpose partition feature support --
+	 * If ext_csd has the size of general purpose partitions,
+	 * set size, part_cfg, partition name in mmc_part.
+	 */
+	if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
+	    EXT_CSD_PART_SUPPORT_PART_EN) {
+		hc_erase_grp_sz =
+			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+		hc_wp_grp_sz =
+			ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+		for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
+			if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
+			    !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
+			    !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
+				continue;
+			if (card->ext_csd.partition_setting_completed == 0) {
+				pr_warn("%s: has partition size defined without partition complete\n",
+					mmc_hostname(card->host));
+				break;
+			}
+			part_size =
+				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
+				<< 16) +
+				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
+				<< 8) +
+				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
+			part_size *= (size_t)(hc_erase_grp_sz *
+				hc_wp_grp_sz);
+			mmc_part_add(card, part_size << 19,
+				EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
+				"gp%d", idx, false,
+				MMC_BLK_DATA_AREA_GP);
+		}
+	}
+}
+
 /*
  * Decode extended CSD.
  */
@@ -305,7 +395,6 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 {
 	int err = 0, idx;
 	unsigned int part_size;
-	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
 
 	BUG_ON(!card);
 
@@ -402,80 +491,16 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 		ext_csd[EXT_CSD_TRIM_MULT];
 	card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
 	if (card->ext_csd.rev >= 4) {
-		/*
-		 * Enhanced area feature support -- check whether the eMMC
-		 * card has the Enhanced area enabled.  If so, export enhanced
-		 * area offset and size to user by adding sysfs interface.
-		 */
-		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
-		    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
-			hc_erase_grp_sz =
-				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
-			hc_wp_grp_sz =
-				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+		if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
+		    EXT_CSD_PART_SETTING_COMPLETED)
+			card->ext_csd.partition_setting_completed = 1;
+		else
+			card->ext_csd.partition_setting_completed = 0;
 
-			card->ext_csd.enhanced_area_en = 1;
-			/*
-			 * calculate the enhanced data area offset, in bytes
-			 */
-			card->ext_csd.enhanced_area_offset =
-				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
-				(ext_csd[137] << 8) + ext_csd[136];
-			if (mmc_card_blockaddr(card))
-				card->ext_csd.enhanced_area_offset <<= 9;
-			/*
-			 * calculate the enhanced data area size, in kilobytes
-			 */
-			card->ext_csd.enhanced_area_size =
-				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
-				ext_csd[140];
-			card->ext_csd.enhanced_area_size *=
-				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
-			card->ext_csd.enhanced_area_size <<= 9;
-		} else {
-			/*
-			 * If the enhanced area is not enabled, disable these
-			 * device attributes.
-			 */
-			card->ext_csd.enhanced_area_offset = -EINVAL;
-			card->ext_csd.enhanced_area_size = -EINVAL;
-		}
+		mmc_manage_enhanced_area(card, ext_csd);
 
-		/*
-		 * General purpose partition feature support --
-		 * If ext_csd has the size of general purpose partitions,
-		 * set size, part_cfg, partition name in mmc_part.
-		 */
-		if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
-			EXT_CSD_PART_SUPPORT_PART_EN) {
-			if (card->ext_csd.enhanced_area_en != 1) {
-				hc_erase_grp_sz =
-					ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
-				hc_wp_grp_sz =
-					ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
-
-				card->ext_csd.enhanced_area_en = 1;
-			}
+		mmc_manage_gp_partitions(card, ext_csd);
 
-			for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
-				if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
-				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
-				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
-					continue;
-				part_size =
-				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
-					<< 16) +
-				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
-					<< 8) +
-				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
-				part_size *= (size_t)(hc_erase_grp_sz *
-					hc_wp_grp_sz);
-				mmc_part_add(card, part_size << 19,
-					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
-					"gp%d", idx, false,
-					MMC_BLK_DATA_AREA_GP);
-			}
-		}
 		card->ext_csd.sec_trim_mult =
 			ext_csd[EXT_CSD_SEC_TRIM_MULT];
 		card->ext_csd.sec_erase_mult =
@@ -789,8 +814,8 @@ static int __mmc_select_powerclass(struct mmc_card *card,
 				ext_csd->raw_pwr_cl_200_360;
 		break;
 	default:
-		pr_warning("%s: Voltage range not supported "
-			   "for power class.\n", mmc_hostname(host));
+		pr_warn("%s: Voltage range not supported for power class\n",
+			mmc_hostname(host));
 		return -EINVAL;
 	}
 
@@ -987,19 +1012,35 @@ static int mmc_select_hs_ddr(struct mmc_card *card)
 	 * 1.8V vccq at 3.3V core voltage (vcc) is not required
 	 * in the JEDEC spec for DDR.
 	 *
-	 * Do not force change in vccq since we are obviously
-	 * working and no change to vccq is needed.
+	 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
+	 * host controller can support this, like some of the SDHCI
+	 * controller which connect to an eMMC device. Some of these
+	 * host controller still needs to use 1.8v vccq for supporting
+	 * DDR mode.
+	 *
+	 * So the sequence will be:
+	 * if (host and device can both support 1.2v IO)
+	 *	use 1.2v IO;
+	 * else if (host and device can both support 1.8v IO)
+	 *	use 1.8v IO;
+	 * so if host and device can only support 3.3v IO, this is the
+	 * last choice.
 	 *
 	 * WARNING: eMMC rules are NOT the same as SD DDR
 	 */
-	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
-		err = __mmc_set_signal_voltage(host,
-				MMC_SIGNAL_VOLTAGE_120);
-		if (err)
-			return err;
-	}
+	err = -EINVAL;
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
+		err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
+
+	if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
+		err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
 
-	mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
+	/* make sure vccq is 3.3v after switching disaster */
+	if (err)
+		err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
+
+	if (!err)
+		mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
 
 	return err;
 }
@@ -1134,6 +1175,38 @@ bus_speed:
 	return err;
 }
 
+const u8 tuning_blk_pattern_4bit[MMC_TUNING_BLK_PATTERN_4BIT_SIZE] = {
+	0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
+	0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
+	0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
+	0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
+	0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
+	0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
+	0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
+	0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
+};
+EXPORT_SYMBOL(tuning_blk_pattern_4bit);
+
+const u8 tuning_blk_pattern_8bit[MMC_TUNING_BLK_PATTERN_8BIT_SIZE] = {
+	0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
+	0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
+	0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
+	0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
+	0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
+	0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
+	0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
+	0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
+	0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
+	0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
+	0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
+	0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
+	0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
+	0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
+	0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
+	0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
+};
+EXPORT_SYMBOL(tuning_blk_pattern_8bit);
+
 /*
  * Execute tuning sequence to seek the proper bus operating
  * conditions for HS200 and HS400, which sends CMD21 to the device.
@@ -1272,6 +1345,13 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	}
 
 	/*
+	 * handling only for cards supporting DSR and hosts requesting
+	 * DSR configuration
+	 */
+	if (card->csd.dsr_imp && host->dsr_req)
+		mmc_set_dsr(host);
+
+	/*
 	 * Select card, as all following commands rely on that.
 	 */
 	if (!mmc_host_is_spi(host)) {
@@ -1308,7 +1388,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
 	 * bit.  This bit will be lost every time after a reset or power off.
 	 */
-	if (card->ext_csd.enhanced_area_en ||
+	if (card->ext_csd.partition_setting_completed ||
 	    (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 				 EXT_CSD_ERASE_GROUP_DEF, 1,
@@ -1408,8 +1488,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		if (err && err != -EBADMSG)
 			goto free_card;
 		if (err) {
-			pr_warning("%s: Enabling HPI failed\n",
-				   mmc_hostname(card->host));
+			pr_warn("%s: Enabling HPI failed\n",
+				mmc_hostname(card->host));
 			err = 0;
 		} else
 			card->ext_csd.hpi_en = 1;
@@ -1430,9 +1510,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		 * Only if no error, cache is turned on successfully.
 		 */
 		if (err) {
-			pr_warning("%s: Cache is supported, "
-					"but failed to turn on (%d)\n",
-					mmc_hostname(card->host), err);
+			pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
+				mmc_hostname(card->host), err);
 			card->ext_csd.cache_ctrl = 0;
 			err = 0;
 		} else {
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index f51b5ba..7911e05 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -93,6 +93,26 @@ int mmc_deselect_cards(struct mmc_host *host)
 	return _mmc_select_card(host, NULL);
 }
 
+/*
+ * Write the value specified in the device tree or board code into the optional
+ * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
+ * drive strength of the DAT and CMD outputs. The actual meaning of a given
+ * value is hardware dependant.
+ * The presence of the DSR register can be determined from the CSD register,
+ * bit 76.
+ */
+int mmc_set_dsr(struct mmc_host *host)
+{
+	struct mmc_command cmd = {0};
+
+	cmd.opcode = MMC_SET_DSR;
+
+	cmd.arg = (host->dsr << 16) | 0xffff;
+	cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+
+	return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+}
+
 int mmc_go_idle(struct mmc_host *host)
 {
 	int err;
@@ -629,8 +649,8 @@ int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
 	int err;
 
 	if (!card->ext_csd.hpi) {
-		pr_warning("%s: Card didn't support HPI command\n",
-			   mmc_hostname(card->host));
+		pr_warn("%s: Card didn't support HPI command\n",
+			mmc_hostname(card->host));
 		return -EINVAL;
 	}
 
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
index 80ae9f4..390dac6 100644
--- a/drivers/mmc/core/mmc_ops.h
+++ b/drivers/mmc/core/mmc_ops.h
@@ -14,6 +14,7 @@
 
 int mmc_select_card(struct mmc_card *card);
 int mmc_deselect_cards(struct mmc_host *host);
+int mmc_set_dsr(struct mmc_host *host);
 int mmc_go_idle(struct mmc_host *host);
 int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
 int mmc_all_send_cid(struct mmc_host *host, u32 *cid);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 0c44510..d90a6de 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -127,6 +127,7 @@ static int mmc_decode_csd(struct mmc_card *card)
 		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+		csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
 		csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 		csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 		csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
@@ -228,8 +229,8 @@ static int mmc_read_ssr(struct mmc_card *card)
 	u32 *ssr;
 
 	if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
-		pr_warning("%s: card lacks mandatory SD Status "
-			"function.\n", mmc_hostname(card->host));
+		pr_warn("%s: card lacks mandatory SD Status function\n",
+			mmc_hostname(card->host));
 		return 0;
 	}
 
@@ -239,8 +240,8 @@ static int mmc_read_ssr(struct mmc_card *card)
 
 	err = mmc_app_sd_status(card, ssr);
 	if (err) {
-		pr_warning("%s: problem reading SD Status "
-			"register.\n", mmc_hostname(card->host));
+		pr_warn("%s: problem reading SD Status register\n",
+			mmc_hostname(card->host));
 		err = 0;
 		goto out;
 	}
@@ -264,8 +265,8 @@ static int mmc_read_ssr(struct mmc_card *card)
 				card->ssr.erase_offset = eo * 1000;
 			}
 		} else {
-			pr_warning("%s: SD Status: Invalid Allocation Unit size.\n",
-				   mmc_hostname(card->host));
+			pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
+				mmc_hostname(card->host));
 		}
 	}
 out:
@@ -285,8 +286,7 @@ static int mmc_read_switch(struct mmc_card *card)
 		return 0;
 
 	if (!(card->csd.cmdclass & CCC_SWITCH)) {
-		pr_warning("%s: card lacks mandatory switch "
-			"function, performance might suffer.\n",
+		pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
 			mmc_hostname(card->host));
 		return 0;
 	}
@@ -315,7 +315,7 @@ static int mmc_read_switch(struct mmc_card *card)
 		if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
 			goto out;
 
-		pr_warning("%s: problem reading Bus Speed modes.\n",
+		pr_warn("%s: problem reading Bus Speed modes\n",
 			mmc_hostname(card->host));
 		err = 0;
 
@@ -371,8 +371,7 @@ int mmc_sd_switch_hs(struct mmc_card *card)
 		goto out;
 
 	if ((status[16] & 0xF) != 1) {
-		pr_warning("%s: Problem switching card "
-			"into high-speed mode!\n",
+		pr_warn("%s: Problem switching card into high-speed mode!\n",
 			mmc_hostname(card->host));
 		err = 0;
 	} else {
@@ -439,7 +438,7 @@ static int sd_select_driver_type(struct mmc_card *card, u8 *status)
 		return err;
 
 	if ((status[15] & 0xF) != drive_strength) {
-		pr_warning("%s: Problem setting drive strength!\n",
+		pr_warn("%s: Problem setting drive strength!\n",
 			mmc_hostname(card->host));
 		return 0;
 	}
@@ -517,7 +516,7 @@ static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
 		return err;
 
 	if ((status[16] & 0xF) != card->sd_bus_speed)
-		pr_warning("%s: Problem setting bus speed mode!\n",
+		pr_warn("%s: Problem setting bus speed mode!\n",
 			mmc_hostname(card->host));
 	else {
 		mmc_set_timing(card->host, timing);
@@ -597,7 +596,7 @@ static int sd_set_current_limit(struct mmc_card *card, u8 *status)
 			return err;
 
 		if (((status[15] >> 4) & 0x0F) != current_limit)
-			pr_warning("%s: Problem setting current limit!\n",
+			pr_warn("%s: Problem setting current limit!\n",
 				mmc_hostname(card->host));
 
 	}
@@ -726,8 +725,7 @@ int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
 try_again:
 	if (!retries) {
 		ocr &= ~SD_OCR_S18R;
-		pr_warning("%s: Skipping voltage switch\n",
-			mmc_hostname(host));
+		pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
 	}
 
 	/*
@@ -871,9 +869,7 @@ int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
 		}
 
 		if (ro < 0) {
-			pr_warning("%s: host does not "
-				"support reading read-only "
-				"switch. assuming write-enable.\n",
+			pr_warn("%s: host does not support reading read-only switch, assuming write-enable\n",
 				mmc_hostname(host));
 		} else if (ro > 0) {
 			mmc_card_set_readonly(card);
@@ -954,6 +950,13 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 	}
 
 	/*
+	 * handling only for cards supporting DSR and hosts requesting
+	 * DSR configuration
+	 */
+	if (card->csd.dsr_imp && host->dsr_req)
+		mmc_set_dsr(host);
+
+	/*
 	 * Select card, as all following commands rely on that.
 	 */
 	if (!mmc_host_is_spi(host)) {
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index e636d9e..2439e71 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -216,8 +216,8 @@ static int sdio_enable_wide(struct mmc_card *card)
 		return ret;
 
 	if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
-		pr_warning("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
-			   mmc_hostname(card->host), ctrl);
+		pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
+			mmc_hostname(card->host), ctrl);
 
 	/* set as 4-bit bus width */
 	ctrl &= ~SDIO_BUS_WIDTH_MASK;
@@ -605,8 +605,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 
 try_again:
 	if (!retries) {
-		pr_warning("%s: Skipping voltage switch\n",
-				mmc_hostname(host));
+		pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
 		ocr &= ~R4_18V_PRESENT;
 	}
 
@@ -992,8 +991,16 @@ static int mmc_sdio_resume(struct mmc_host *host)
 		}
 	}
 
-	if (!err && host->sdio_irqs)
-		wake_up_process(host->sdio_irq_thread);
+	if (!err && host->sdio_irqs) {
+		if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
+			wake_up_process(host->sdio_irq_thread);
+		} else if (host->caps & MMC_CAP_SDIO_IRQ) {
+			mmc_host_clk_hold(host);
+			host->ops->enable_sdio_irq(host, 1);
+			mmc_host_clk_release(host);
+		}
+	}
+
 	mmc_release_host(host);
 
 	host->pm_flags &= ~MMC_PM_KEEP_POWER;
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 65cf7a7..6da97b1 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -178,8 +178,8 @@ static int sdio_bus_remove(struct device *dev)
 	drv->remove(func);
 
 	if (func->irq_handler) {
-		pr_warning("WARNING: driver %s did not remove "
-			"its interrupt handler!\n", drv->name);
+		pr_warn("WARNING: driver %s did not remove its interrupt handler!\n",
+			drv->name);
 		sdio_claim_host(func);
 		sdio_release_irq(func);
 		sdio_release_host(func);
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index 5cc13c8..09cc67d 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -69,16 +69,15 @@ static int process_sdio_pending_irqs(struct mmc_host *host)
 		if (pending & (1 << i)) {
 			func = card->sdio_func[i - 1];
 			if (!func) {
-				pr_warning("%s: pending IRQ for "
-					"non-existent function\n",
+				pr_warn("%s: pending IRQ for non-existent function\n",
 					mmc_card_id(card));
 				ret = -EINVAL;
 			} else if (func->irq_handler) {
 				func->irq_handler(func);
 				count++;
 			} else {
-				pr_warning("%s: pending IRQ with no handler\n",
-				       sdio_func_id(func));
+				pr_warn("%s: pending IRQ with no handler\n",
+					sdio_func_id(func));
 				ret = -EINVAL;
 			}
 		}
@@ -208,7 +207,7 @@ static int sdio_card_irq_get(struct mmc_card *card)
 				host->sdio_irqs--;
 				return err;
 			}
-		} else {
+		} else if (host->caps & MMC_CAP_SDIO_IRQ) {
 			mmc_host_clk_hold(host);
 			host->ops->enable_sdio_irq(host, 1);
 			mmc_host_clk_release(host);
@@ -229,7 +228,7 @@ static int sdio_card_irq_put(struct mmc_card *card)
 		if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
 			atomic_set(&host->sdio_irq_thread_abort, 1);
 			kthread_stop(host->sdio_irq_thread);
-		} else {
+		} else if (host->caps & MMC_CAP_SDIO_IRQ) {
 			mmc_host_clk_hold(host);
 			host->ops->enable_sdio_irq(host, 0);
 			mmc_host_clk_release(host);
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
index 5f89cb8..69bbf2a 100644
--- a/drivers/mmc/core/slot-gpio.c
+++ b/drivers/mmc/core/slot-gpio.c
@@ -221,8 +221,6 @@ int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio,
 	ctx->override_cd_active_level = true;
 	ctx->cd_gpio = gpio_to_desc(gpio);
 
-	mmc_gpiod_request_cd_irq(host);
-
 	return 0;
 }
 EXPORT_SYMBOL(mmc_gpio_request_cd);
@@ -283,6 +281,8 @@ EXPORT_SYMBOL(mmc_gpio_free_cd);
  * @idx: index of the GPIO to obtain in the consumer
  * @override_active_level: ignore %GPIO_ACTIVE_LOW flag
  * @debounce: debounce time in microseconds
+ * @gpio_invert: will return whether the GPIO line is inverted or not, set
+ * to NULL to ignore
  *
  * Use this function in place of mmc_gpio_request_cd() to use the GPIO
  * descriptor API.  Note that it is paired with mmc_gpiod_free_cd() not
@@ -293,7 +293,7 @@ EXPORT_SYMBOL(mmc_gpio_free_cd);
  */
 int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
 			 unsigned int idx, bool override_active_level,
-			 unsigned int debounce)
+			 unsigned int debounce, bool *gpio_invert)
 {
 	struct mmc_gpio *ctx;
 	struct gpio_desc *desc;
@@ -308,20 +308,19 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
 	if (!con_id)
 		con_id = ctx->cd_label;
 
-	desc = devm_gpiod_get_index(host->parent, con_id, idx);
+	desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN);
 	if (IS_ERR(desc))
 		return PTR_ERR(desc);
 
-	ret = gpiod_direction_input(desc);
-	if (ret < 0)
-		return ret;
-
 	if (debounce) {
 		ret = gpiod_set_debounce(desc, debounce);
 		if (ret < 0)
 			return ret;
 	}
 
+	if (gpio_invert)
+		*gpio_invert = !gpiod_is_active_low(desc);
+
 	ctx->override_cd_active_level = override_active_level;
 	ctx->cd_gpio = desc;
 
@@ -330,6 +329,59 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
 EXPORT_SYMBOL(mmc_gpiod_request_cd);
 
 /**
+ * mmc_gpiod_request_ro - request a gpio descriptor for write protection
+ * @host: mmc host
+ * @con_id: function within the GPIO consumer
+ * @idx: index of the GPIO to obtain in the consumer
+ * @override_active_level: ignore %GPIO_ACTIVE_LOW flag
+ * @debounce: debounce time in microseconds
+ * @gpio_invert: will return whether the GPIO line is inverted or not,
+ * set to NULL to ignore
+ *
+ * Use this function in place of mmc_gpio_request_ro() to use the GPIO
+ * descriptor API.  Note that it is paired with mmc_gpiod_free_ro() not
+ * mmc_gpio_free_ro().
+ *
+ * Returns zero on success, else an error.
+ */
+int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
+			 unsigned int idx, bool override_active_level,
+			 unsigned int debounce, bool *gpio_invert)
+{
+	struct mmc_gpio *ctx;
+	struct gpio_desc *desc;
+	int ret;
+
+	ret = mmc_gpio_alloc(host);
+	if (ret < 0)
+		return ret;
+
+	ctx = host->slot.handler_priv;
+
+	if (!con_id)
+		con_id = ctx->ro_label;
+
+	desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN);
+	if (IS_ERR(desc))
+		return PTR_ERR(desc);
+
+	if (debounce) {
+		ret = gpiod_set_debounce(desc, debounce);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (gpio_invert)
+		*gpio_invert = !gpiod_is_active_low(desc);
+
+	ctx->override_ro_active_level = override_active_level;
+	ctx->ro_gpio = desc;
+
+	return 0;
+}
+EXPORT_SYMBOL(mmc_gpiod_request_ro);
+
+/**
  * mmc_gpiod_free_cd - free the card-detection gpio descriptor
  * @host: mmc host
  *
@@ -348,7 +400,7 @@ void mmc_gpiod_free_cd(struct mmc_host *host)
 		host->slot.cd_irq = -EINVAL;
 	}
 
-	devm_gpiod_put(&host->class_dev, ctx->cd_gpio);
+	devm_gpiod_put(host->parent, ctx->cd_gpio);
 
 	ctx->cd_gpio = NULL;
 }