Merge tag 'mmc-merge-for-3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

Pull MMC updates from Chris Ball:
 "Core:
   - Add DT properties for card detection (broken-cd, cd-gpios,
     non-removable)
   - Don't poll non-removable devices
   - Fixup/rework eMMC sleep mode/"power off notify" feature
   - Support eMMC background operations (BKOPS).  To set the one-time
     programmable fuse that enables bkops on an eMMC that doesn't
     already have it set, you can use the "mmc bkops enable" command in:

       git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git

  Drivers:
   - atmel-mci, dw_mmc, pxa-mci, dove, s3c, spear: Add device tree
     support
   - bfin_sdh: Add support for the controller in bf60x
   - dw_mmc: Support Samsung Exynos SoCs
   - eSDHC: Add ADMA support
   - sdhci: Support testing a cd-gpio (from slot-gpio) instead of
     presence bit
   - sdhci-pltfm: Support broken-cd DT property
   - tegra: Convert to only supporting DT (mach-tegra has gone DT-only)"

* tag 'mmc-merge-for-3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (67 commits)
  mmc: core: Fixup broken suspend and eMMC4.5 power off notify
  mmc: sdhci-spear: Add clk_{un}prepare() support
  mmc: sdhci-spear: add device tree bindings
  mmc: sdhci-s3c: Add clk_(enable/disable) in runtime suspend/resume
  mmc: core: Replace MMC_CAP2_BROKEN_VOLTAGE with test for fixed regulator
  mmc: sdhci-pxav3: Use sdhci_get_of_property for parsing DT quirks
  mmc: dt: Support "broken-cd" property in sdhci-pltfm
  mmc: sdhci-s3c: fix the wrong number of max bus clocks
  mmc: sh-mmcif: avoid oops on spurious interrupts
  mmc: sh-mmcif: properly handle MMC_WRITE_MULTIPLE_BLOCK completion IRQ
  mmc: sdhci-s3c: Fix crash on module insertion for second time
  mmc: sdhci-s3c: Enable only required bus clock
  mmc: Revert "mmc: dw_mmc: Add check for IDMAC configuration"
  mmc: mxcmmc: fix bug that may block a data transfer forever
  mmc: omap_hsmmc: Pass on the suspend failure to the PM core
  mmc: atmel-mci: AP700x PDC is not connected to MCI
  mmc: atmel-mci: DMA can be used with other controllers
  mmc: mmci: use clk_prepare_enable and clk_disable_unprepare
  mmc: sdhci-s3c: Add device tree support
  mmc: dw_mmc: add support for exynos specific implementation of dw-mshc
  ...

Documentation/devicetree/bindings/mmc/atmel-hsmci.txt

+* Atmel High Speed MultiMedia Card Interface
+
+This controller on atmel products provides an interface for MMC, SD and SDIO
+types of memory cards.
+
+This file documents differences between the core properties described
+by mmc.txt and the properties used by the atmel-mci driver.
+
+1) MCI node
+
+Required properties:
+- compatible: should be "atmel,hsmci"
+- #address-cells: should be one. The cell is the slot id.
+- #size-cells: should be zero.
+- at least one slot node
+
+The node contains child nodes for each slot that the platform uses
+
+Example MCI node:
+
+mmc0: mmc@f0008000 {
+	compatible = "atmel,hsmci";
+	reg = <0xf0008000 0x600>;
+	interrupts = <12 4>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	[ child node definitions...]
+};
+
+2) slot nodes
+
+Required properties:
+- reg: should contain the slot id.
+- bus-width: number of data lines connected to the controller
+
+Optional properties:
+- cd-gpios: specify GPIOs for card detection
+- cd-inverted: invert the value of external card detect gpio line
+- wp-gpios: specify GPIOs for write protection
+
+Example slot node:
+
+slot@0 {
+	reg = <0>;
+	bus-width = <4>;
+	cd-gpios = <&pioD 15 0>
+	cd-inverted;
+};
+
+Example full MCI node:
+mmc0: mmc@f0008000 {
+	compatible = "atmel,hsmci";
+	reg = <0xf0008000 0x600>;
+	interrupts = <12 4>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	slot@0 {
+		reg = <0>;
+		bus-width = <4>;
+		cd-gpios = <&pioD 15 0>
+		cd-inverted;
+	};
+	slot@1 {
+		reg = <1>;
+		bus-width = <4>;
+	};
+};

Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt

+* Samsung Exynos specific extensions to the Synopsis Designware Mobile
+  Storage Host Controller
+
+The Synopsis designware mobile storage host controller is used to interface
+a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
+differences between the core Synopsis dw mshc controller properties described
+by synposis-dw-mshc.txt and the properties used by the Samsung Exynos specific
+extensions to the Synopsis Designware Mobile Storage Host Controller.
+
+Required Properties:
+
+* compatible: should be
+	- "samsung,exynos4210-dw-mshc": for controllers with Samsung Exynos4210
+	  specific extentions.
+	- "samsung,exynos4412-dw-mshc": for controllers with Samsung Exynos4412
+	  specific extentions.
+	- "samsung,exynos5250-dw-mshc": for controllers with Samsung Exynos5250
+	  specific extentions.
+
+* samsung,dw-mshc-ciu-div: Specifies the divider value for the card interface
+  unit (ciu) clock. This property is applicable only for Exynos5 SoC's and
+  ignored for Exynos4 SoC's. The valid range of divider value is 0 to 7.
+
+* samsung,dw-mshc-sdr-timing: Specifies the value of CIU clock phase shift value
+  in transmit mode and CIU clock phase shift value in receive mode for single
+  data rate mode operation. Refer notes below for the order of the cells and the
+  valid values.
+
+* samsung,dw-mshc-ddr-timing: Specifies the value of CUI clock phase shift value
+  in transmit mode and CIU clock phase shift value in receive mode for double
+  data rate mode operation. Refer notes below for the order of the cells and the
+  valid values.
+
+  Notes for the sdr-timing and ddr-timing values:
+
+    The order of the cells should be
+      - First Cell: CIU clock phase shift value for tx mode.
+      - Second Cell: CIU clock phase shift value for rx mode.
+
+    Valid values for SDR and DDR CIU clock timing for Exynos5250:
+      - valid value for tx phase shift and rx phase shift is 0 to 7.
+      - when CIU clock divider value is set to 3, all possible 8 phase shift
+        values can be used.
+      - if CIU clock divider value is 0 (that is divide by 1), both tx and rx
+        phase shift clocks should be 0.
+
+Required properties for a slot:
+
+* gpios: specifies a list of gpios used for command, clock and data bus. The
+  first gpio is the command line and the second gpio is the clock line. The
+  rest of the gpios (depending on the bus-width property) are the data lines in
+  no particular order. The format of the gpio specifier depends on the gpio
+  controller.
+
+Example:
+
+  The MSHC controller node can be split into two portions, SoC specific and
+  board specific portions as listed below.
+
+	dwmmc0@12200000 {
+		compatible = "samsung,exynos5250-dw-mshc";
+		reg = <0x12200000 0x1000>;
+		interrupts = <0 75 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
+	dwmmc0@12200000 {
+		num-slots = <1>;
+		supports-highspeed;
+		broken-cd;
+		fifo-depth = <0x80>;
+		card-detect-delay = <200>;
+		samsung,dw-mshc-ciu-div = <3>;
+		samsung,dw-mshc-sdr-timing = <2 3>;
+		samsung,dw-mshc-ddr-timing = <1 2>;
+
+		slot@0 {
+			reg = <0>;
+			bus-width = <8>;
+			gpios = <&gpc0 0 2 0 3>, <&gpc0 1 2 0 3>,
+				<&gpc1 0 2 3 3>, <&gpc1 1 2 3 3>,
+				<&gpc1 2 2 3 3>, <&gpc1 3 2 3 3>,
+				<&gpc0 3 2 3 3>, <&gpc0 4 2 3 3>,
+				<&gpc0 5 2 3 3>, <&gpc0 6 2 3 3>;
+		};
+	};

Documentation/devicetree/bindings/mmc/mmc.txt

@@ -9,12 +9,17 @@ Interpreted by the OF core:
 Required properties:
 - bus-width: Number of data lines, can be <1>, <4>, or <8>
 
+Card detection:
+If no property below is supplied, standard SDHCI card detect is used.
+Only one of the properties in this section should be supplied:
+  - broken-cd: There is no card detection available; polling must be used.
+  - cd-gpios: Specify GPIOs for card detection, see gpio binding
+  - non-removable: non-removable slot (like eMMC); assume always present.
+
 Optional properties:
-- cd-gpios: Specify GPIOs for card detection, see gpio binding
 - wp-gpios: Specify GPIOs for write protection, see gpio binding
 - cd-inverted: when present, polarity on the cd gpio line is inverted
 - wp-inverted: when present, polarity on the wp gpio line is inverted
-- non-removable: non-removable slot (like eMMC)
 - max-frequency: maximum operating clock frequency
 
 Example:

Documentation/devicetree/bindings/mmc/pxa-mmc.txt

+* PXA MMC drivers
+
+Driver bindings for the PXA MCI (MMC/SDIO) interfaces
+
+Required properties:
+- compatible: Should be "marvell,pxa-mmc".
+- vmmc-supply: A regulator for VMMC
+
+Optional properties:
+- marvell,detect-delay-ms: sets the detection delay timeout in ms.
+- marvell,gpio-power: GPIO spec for the card power enable pin
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the pxa-mmc driver.
+
+Examples:
+
+mmc0: mmc@41100000 {
+	compatible = "marvell,pxa-mmc";
+	reg = <0x41100000 0x1000>;
+	interrupts = <23>;
+	cd-gpios = <&gpio 23 0>;
+	wp-gpios = <&gpio 24 0>;
+};
+

Documentation/devicetree/bindings/mmc/samsung-sdhci.txt

+* Samsung's SDHCI Controller device tree bindings
+
+Samsung's SDHCI controller is used as a connectivity interface with external
+MMC, SD and eMMC storage mediums. This file documents differences between the
+core mmc properties described by mmc.txt and the properties used by the
+Samsung implmentation of the SDHCI controller.
+
+Note: The mmc core bindings documentation states that if none of the core
+card-detect bindings are used, then the standard sdhci card detect mechanism
+is used. The Samsung's SDHCI controller bindings extends this as listed below.
+
+[A] The property "samsung,cd-pinmux-gpio" can be used as stated in the
+    "Optional Board Specific Properties" section below.
+
+[B] If core card-detect bindings and "samsung,cd-pinmux-gpio" property
+    is not specified, it is assumed that there is no card detection
+    mechanism used.
+
+Required SoC Specific Properties:
+- compatible: should be one of the following
+  - "samsung,s3c6410-sdhci": For controllers compatible with s3c6410 sdhci
+    controller.
+  - "samsung,exynos4210-sdhci": For controllers compatible with Exynos4 sdhci
+    controller.
+
+Required Board Specific Properties:
+- gpios: Should specify the gpios used for clock, command and data lines. The
+  gpio specifier format depends on the gpio controller.
+
+Optional Board Specific Properties:
+- samsung,cd-pinmux-gpio: Specifies the card detect line that is routed
+  through a pinmux to the card-detect pin of the card slot. This property
+  should be used only if none of the mmc core card-detect properties are
+  used.
+
+Example:
+	sdhci@12530000 {
+		compatible = "samsung,exynos4210-sdhci";
+		reg = <0x12530000 0x100>;
+		interrupts = <0 75 0>;
+		bus-width = <4>;
+		cd-gpios = <&gpk2 2 2 3 3>;
+		gpios = <&gpk2 0 2 0 3>,  /* clock line */
+			<&gpk2 1 2 0 3>,  /* command line */
+			<&gpk2 3 2 3 3>,  /* data line 0 */
+			<&gpk2 4 2 3 3>,  /* data line 1 */
+			<&gpk2 5 2 3 3>,  /* data line 2 */
+			<&gpk2 6 2 3 3>;  /* data line 3 */
+	};
+
+	Note: This example shows both SoC specific and board specific properties
+	in a single device node. The properties can be actually be seperated
+	into SoC specific node and board specific node.

Documentation/devicetree/bindings/mmc/sdhci-dove.txt

+* Marvell sdhci-dove controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the sdhci-pxav2 and sdhci-pxav3 drivers.
+
+- compatible: Should be "marvell,dove-sdhci".
+
+Example:
+
+sdio0: sdio@92000 {
+	compatible = "marvell,dove-sdhci";
+	reg = <0x92000 0x100>;
+	interrupts = <35>;
+};

Documentation/devicetree/bindings/mmc/sdhci-spear.txt

+* SPEAr SDHCI Controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the sdhci-spear driver.
+
+Required properties:
+- compatible: "st,spear300-sdhci"
+
+Optional properties:
+- cd-gpios: card detect gpio, with zero flags.
+
+Example:
+
+	sdhci@fc000000 {
+		compatible = "st,spear300-sdhci";
+		reg = <0xfc000000 0x1000>;
+		cd-gpios = <&gpio0 6 0>;
+	};

Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt

+* Synopsis Designware Mobile Storage Host Controller
+
+The Synopsis designware mobile storage host controller is used to interface
+a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
+differences between the core mmc properties described by mmc.txt and the
+properties used by the Synopsis Designware Mobile Storage Host Controller.
+
+Required Properties:
+
+* compatible: should be
+	- snps,dw-mshc: for controllers compliant with synopsis dw-mshc.
+* #address-cells: should be 1.
+* #size-cells: should be 0.
+
+# Slots: The slot specific information are contained within child-nodes with
+  each child-node representing a supported slot. There should be atleast one
+  child node representing a card slot. The name of the child node representing
+  the slot is recommended to be slot@n where n is the unique number of the slot
+  connnected to the controller. The following are optional properties which
+  can be included in the slot child node.
+
+	* reg: specifies the physical slot number. The valid values of this
+	  property is 0 to (num-slots -1), where num-slots is the value
+	  specified by the num-slots property.
+
+	* bus-width: as documented in mmc core bindings.
+
+	* wp-gpios: specifies the write protect gpio line. The format of the
+	  gpio specifier depends on the gpio controller. If the write-protect
+	  line is not available, this property is optional.
+
+Optional properties:
+
+* num-slots: specifies the number of slots supported by the controller.
+  The number of physical slots actually used could be equal or less than the
+  value specified by num-slots. If this property is not specified, the value
+  of num-slot property is assumed to be 1.
+
+* fifo-depth: The maximum size of the tx/rx fifo's. If this property is not
+  specified, the default value of the fifo size is determined from the
+  controller registers.
+
+* card-detect-delay: Delay in milli-seconds before detecting card after card
+  insert event. The default value is 0.
+
+* supports-highspeed: Enables support for high speed cards (upto 50MHz)
+
+* broken-cd: as documented in mmc core bindings.
+
+Aliases:
+
+- All the MSHC controller nodes should be represented in the aliases node using
+  the following format 'mshc{n}' where n is a unique number for the alias.
+
+Example:
+
+The MSHC controller node can be split into two portions, SoC specific and
+board specific portions as listed below.
+
+	dwmmc0@12200000 {
+		compatible = "snps,dw-mshc";
+		reg = <0x12200000 0x1000>;
+		interrupts = <0 75 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
+
+	dwmmc0@12200000 {
+		num-slots = <1>;
+		supports-highspeed;
+		broken-cd;
+		fifo-depth = <0x80>;
+		card-detect-delay = <200>;
+
+		slot@0 {
+			reg = <0>;
+			bus-width = <8>;
+		};
+	};

MAINTAINERS

@@ -1544,7 +1544,7 @@ S:	Supported
 F:	drivers/rtc/rtc-bfin.c
 
 BLACKFIN SDH DRIVER
-M:	Cliff Cai <cliff.cai@analog.com>
+M:	Sonic Zhang <sonic.zhang@analog.com>
 L:	uclinux-dist-devel@blackfin.uclinux.org
 W:	http://blackfin.uclinux.org
 S:	Supported
@@ -5207,8 +5207,10 @@ S:	Maintained
 F:	drivers/mmc/host/omap.c
 
 OMAP HS MMC SUPPORT
+M:	Venkatraman S <svenkatr@ti.com>
+L:	linux-mmc@vger.kernel.org
 L:	linux-omap@vger.kernel.org
-S:	Orphan
+S:	Maintained
 F:	drivers/mmc/host/omap_hsmmc.c
 
 OMAP RANDOM NUMBER GENERATOR SUPPORT

arch/arm/boot/dts/spear300-evb.dts

@@ -80,8 +80,7 @@
 		};
 
 		sdhci@70000000 {
-			int-gpio = <&gpio1 0 0>;
-			power-gpio = <&gpio1 2 1>;
+			cd-gpios = <&gpio1 0 0>;
 			status = "okay";
 		};
 

arch/arm/boot/dts/spear320-evb.dts

@@ -103,8 +103,6 @@
 		};
 
 		sdhci@70000000 {
-			power-gpio = <&gpio0 2 1>;
-			power_always_enb;
 			status = "okay";
 		};
 

drivers/mmc/core/core.c

@@ -26,6 +26,7 @@
 #include <linux/suspend.h>
 #include <linux/fault-inject.h>
 #include <linux/random.h>
+#include <linux/slab.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
@@ -41,6 +42,12 @@
 #include "sd_ops.h"
 #include "sdio_ops.h"
 
+/*
+ * Background operations can take a long time, depending on the housekeeping
+ * operations the card has to perform.
+ */
+#define MMC_BKOPS_MAX_TIMEOUT	(4 * 60 * 1000) /* max time to wait in ms */
+
 static struct workqueue_struct *workqueue;
 static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
 
@@ -245,6 +252,70 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 	host->ops->request(host, mrq);
 }
 
+/**
+ *	mmc_start_bkops - start BKOPS for supported cards
+ *	@card: MMC card to start BKOPS
+ *	@form_exception: A flag to indicate if this function was
+ *			 called due to an exception raised by the card
+ *
+ *	Start background operations whenever requested.
+ *	When the urgent BKOPS bit is set in a R1 command response
+ *	then background operations should be started immediately.
+*/
+void mmc_start_bkops(struct mmc_card *card, bool from_exception)
+{
+	int err;
+	int timeout;
+	bool use_busy_signal;
+
+	BUG_ON(!card);
+
+	if (!card->ext_csd.bkops_en || mmc_card_doing_bkops(card))
+		return;
+
+	err = mmc_read_bkops_status(card);
+	if (err) {
+		pr_err("%s: Failed to read bkops status: %d\n",
+		       mmc_hostname(card->host), err);
+		return;
+	}
+
+	if (!card->ext_csd.raw_bkops_status)
+		return;
+
+	if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 &&
+	    from_exception)
+		return;
+
+	mmc_claim_host(card->host);
+	if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) {
+		timeout = MMC_BKOPS_MAX_TIMEOUT;
+		use_busy_signal = true;
+	} else {
+		timeout = 0;
+		use_busy_signal = false;
+	}
+
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			EXT_CSD_BKOPS_START, 1, timeout, use_busy_signal);
+	if (err) {
+		pr_warn("%s: Error %d starting bkops\n",
+			mmc_hostname(card->host), err);
+		goto out;
+	}
+
+	/*
+	 * For urgent bkops status (LEVEL_2 and more)
+	 * bkops executed synchronously, otherwise
+	 * the operation is in progress
+	 */
+	if (!use_busy_signal)
+		mmc_card_set_doing_bkops(card);
+out:
+	mmc_release_host(card->host);
+}
+EXPORT_SYMBOL(mmc_start_bkops);
+
 static void mmc_wait_done(struct mmc_request *mrq)
 {
 	complete(&mrq->completion);
@@ -354,6 +425,14 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
 	if (host->areq) {
 		mmc_wait_for_req_done(host, host->areq->mrq);
 		err = host->areq->err_check(host->card, host->areq);
+		/*
+		 * Check BKOPS urgency for each R1 response
+		 */
+		if (host->card && mmc_card_mmc(host->card) &&
+		    ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) ||
+		     (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) &&
+		    (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT))
+			mmc_start_bkops(host->card, true);
 	}
 
 	if (!err && areq)
@@ -398,7 +477,7 @@ EXPORT_SYMBOL(mmc_wait_for_req);
  *	@card: the MMC card associated with the HPI transfer
  *
  *	Issued High Priority Interrupt, and check for card status
- *	util out-of prg-state.
+ *	until out-of prg-state.
  */
 int mmc_interrupt_hpi(struct mmc_card *card)
 {
@@ -424,8 +503,9 @@ int mmc_interrupt_hpi(struct mmc_card *card)
 	case R1_STATE_IDLE:
 	case R1_STATE_READY:
 	case R1_STATE_STBY:
+	case R1_STATE_TRAN:
 		/*
-		 * In idle states, HPI is not needed and the caller
+		 * In idle and transfer states, HPI is not needed and the caller
 		 * can issue the next intended command immediately
 		 */
 		goto out;
@@ -488,6 +568,64 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries
 
 EXPORT_SYMBOL(mmc_wait_for_cmd);
 
+/**
+ *	mmc_stop_bkops - stop ongoing BKOPS
+ *	@card: MMC card to check BKOPS
+ *
+ *	Send HPI command to stop ongoing background operations to
+ *	allow rapid servicing of foreground operations, e.g. read/
+ *	writes. Wait until the card comes out of the programming state
+ *	to avoid errors in servicing read/write requests.
+ */
+int mmc_stop_bkops(struct mmc_card *card)
+{
+	int err = 0;
+
+	BUG_ON(!card);
+	err = mmc_interrupt_hpi(card);
+
+	/*
+	 * If err is EINVAL, we can't issue an HPI.
+	 * It should complete the BKOPS.
+	 */
+	if (!err || (err == -EINVAL)) {
+		mmc_card_clr_doing_bkops(card);
+		err = 0;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_stop_bkops);
+
+int mmc_read_bkops_status(struct mmc_card *card)
+{
+	int err;
+	u8 *ext_csd;
+
+	/*
+	 * In future work, we should consider storing the entire ext_csd.
+	 */
+	ext_csd = kmalloc(512, GFP_KERNEL);
+	if (!ext_csd) {
+		pr_err("%s: could not allocate buffer to receive the ext_csd.\n",
+		       mmc_hostname(card->host));
+		return -ENOMEM;
+	}
+
+	mmc_claim_host(card->host);
+	err = mmc_send_ext_csd(card, ext_csd);
+	mmc_release_host(card->host);
+	if (err)
+		goto out;
+
+	card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
+	card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
+out:
+	kfree(ext_csd);
+	return err;
+}
+EXPORT_SYMBOL(mmc_read_bkops_status);
+
 /**
  *	mmc_set_data_timeout - set the timeout for a data command
  *	@data: data phase for command
@@ -975,7 +1113,8 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
 		int		tmp;
 		int		voltage;
 
-		/* REVISIT mmc_vddrange_to_ocrmask() may have set some
+		/*
+		 * REVISIT mmc_vddrange_to_ocrmask() may have set some
 		 * bits this regulator doesn't quite support ... don't
 		 * be too picky, most cards and regulators are OK with
 		 * a 0.1V range goof (it's a small error percentage).
@@ -989,12 +1128,13 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
 			max_uV = min_uV + 100 * 1000;
 		}
 
-		/* avoid needless changes to this voltage; the regulator
-		 * might not allow this operation
+		/*
+		 * If we're using a fixed/static regulator, don't call
+		 * regulator_set_voltage; it would fail.
 		 */
 		voltage = regulator_get_voltage(supply);
 
-		if (mmc->caps2 & MMC_CAP2_BROKEN_VOLTAGE)
+		if (regulator_count_voltages(supply) == 1)
 			min_uV = max_uV = voltage;
 
 		if (voltage < 0)
@@ -1133,48 +1273,6 @@ void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
 	mmc_host_clk_release(host);
 }
 
-static void mmc_poweroff_notify(struct mmc_host *host)
-{
-	struct mmc_card *card;
-	unsigned int timeout;
-	unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION;
-	int err = 0;
-
-	card = host->card;
-	mmc_claim_host(host);
-
-	/*
-	 * Send power notify command only if card
-	 * is mmc and notify state is powered ON
-	 */
-	if (card && mmc_card_mmc(card) &&
-	    (card->poweroff_notify_state == MMC_POWERED_ON)) {
-
-		if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
-			notify_type = EXT_CSD_POWER_OFF_SHORT;
-			timeout = card->ext_csd.generic_cmd6_time;
-			card->poweroff_notify_state = MMC_POWEROFF_SHORT;
-		} else {
-			notify_type = EXT_CSD_POWER_OFF_LONG;
-			timeout = card->ext_csd.power_off_longtime;
-			card->poweroff_notify_state = MMC_POWEROFF_LONG;
-		}
-
-		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-				 EXT_CSD_POWER_OFF_NOTIFICATION,
-				 notify_type, timeout);
-
-		if (err && err != -EBADMSG)
-			pr_err("Device failed to respond within %d poweroff "
-			       "time. Forcefully powering down the device\n",
-			       timeout);
-
-		/* Set the card state to no notification after the poweroff */
-		card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
-	}
-	mmc_release_host(host);
-}
-
 /*
  * Apply power to the MMC stack.  This is a two-stage process.
  * First, we enable power to the card without the clock running.
@@ -1237,8 +1335,6 @@ static void mmc_power_up(struct mmc_host *host)
 
 void mmc_power_off(struct mmc_host *host)
 {
-	int err = 0;
-
 	if (host->ios.power_mode == MMC_POWER_OFF)
 		return;
 
@@ -1247,22 +1343,6 @@ void mmc_power_off(struct mmc_host *host)
 	host->ios.clock = 0;
 	host->ios.vdd = 0;
 
-	/*
-	 * For eMMC 4.5 device send AWAKE command before
-	 * POWER_OFF_NOTIFY command, because in sleep state
-	 * eMMC 4.5 devices respond to only RESET and AWAKE cmd
-	 */
-	if (host->card && mmc_card_is_sleep(host->card) &&
-	    host->bus_ops->resume) {
-		err = host->bus_ops->resume(host);
-
-		if (!err)
-			mmc_poweroff_notify(host);
-		else
-			pr_warning("%s: error %d during resume "
-				   "(continue with poweroff sequence)\n",
-				   mmc_hostname(host), err);
-	}
 
 	/*
 	 * Reset ocr mask to be the highest possible voltage supported for
@@ -2052,6 +2132,11 @@ void mmc_rescan(struct work_struct *work)
 	if (host->rescan_disable)
 		return;
 
+	/* If there is a non-removable card registered, only scan once */
+	if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered)
+		return;
+	host->rescan_entered = 1;
+
 	mmc_bus_get(host);
 
 	/*
@@ -2327,9 +2412,14 @@ int mmc_suspend_host(struct mmc_host *host)
 
 	mmc_bus_get(host);
 	if (host->bus_ops && !host->bus_dead) {
-
-		if (host->bus_ops->suspend)
+		if (host->bus_ops->suspend) {
+			if (mmc_card_doing_bkops(host->card)) {
+				err = mmc_stop_bkops(host->card);
+				if (err)
+					goto out;
+			}
 			err = host->bus_ops->suspend(host);
+		}
 
 		if (err == -ENOSYS || !host->bus_ops->resume) {
 			/*
@@ -2411,15 +2501,24 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 	struct mmc_host *host = container_of(
 		notify_block, struct mmc_host, pm_notify);
 	unsigned long flags;
-
+	int err = 0;
 
 	switch (mode) {
 	case PM_HIBERNATION_PREPARE:
 	case PM_SUSPEND_PREPARE:
+		if (host->card && mmc_card_mmc(host->card) &&
+		    mmc_card_doing_bkops(host->card)) {
+			err = mmc_stop_bkops(host->card);
+			if (err) {
+				pr_err("%s: didn't stop bkops\n",
+					mmc_hostname(host));
+				return err;
+			}
+			mmc_card_clr_doing_bkops(host->card);
+		}
 
 		spin_lock_irqsave(&host->lock, flags);
 		host->rescan_disable = 1;
-		host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
 		spin_unlock_irqrestore(&host->lock, flags);
 		cancel_delayed_work_sync(&host->detect);
 
@@ -2443,7 +2542,6 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 
 		spin_lock_irqsave(&host->lock, flags);
 		host->rescan_disable = 0;
-		host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG;
 		spin_unlock_irqrestore(&host->lock, flags);
 		mmc_detect_change(host, 0);
 

drivers/mmc/core/debugfs.c

@@ -281,7 +281,7 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
 	if (err)
 		goto out_free;
 
-	for (i = 511; i >= 0; i--)
+	for (i = 0; i < 512; i++)
 		n += sprintf(buf + n, "%02x", ext_csd[i]);
 	n += sprintf(buf + n, "\n");
 	BUG_ON(n != EXT_CSD_STR_LEN);

drivers/mmc/core/mmc.c

@@ -463,6 +463,17 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 	}
 
 	if (card->ext_csd.rev >= 5) {
+		/* check whether the eMMC card supports BKOPS */
+		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
+			card->ext_csd.bkops = 1;
+			card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
+			card->ext_csd.raw_bkops_status =
+				ext_csd[EXT_CSD_BKOPS_STATUS];
+			if (!card->ext_csd.bkops_en)
+				pr_info("%s: BKOPS_EN bit is not set\n",
+					mmc_hostname(card->host));
+		}
+
 		/* check whether the eMMC card supports HPI */
 		if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
 			card->ext_csd.hpi = 1;
@@ -996,7 +1007,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		 * so check for success and update the flag
 		 */
 		if (!err)
-			card->poweroff_notify_state = MMC_POWERED_ON;
+			card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
 	}
 
 	/*
@@ -1262,6 +1273,35 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	return err;
 }
 
+static int mmc_can_poweroff_notify(const struct mmc_card *card)
+{
+	return card &&
+		mmc_card_mmc(card) &&
+		(card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
+}
+
+static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
+{
+	unsigned int timeout = card->ext_csd.generic_cmd6_time;
+	int err;
+
+	/* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
+	if (notify_type == EXT_CSD_POWER_OFF_LONG)
+		timeout = card->ext_csd.power_off_longtime;
+
+	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			 EXT_CSD_POWER_OFF_NOTIFICATION,
+			 notify_type, timeout);
+	if (err)
+		pr_err("%s: Power Off Notification timed out, %u\n",
+		       mmc_hostname(card->host), timeout);
+
+	/* Disable the power off notification after the switch operation. */
+	card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
+
+	return err;
+}
+
 /*
  * Host is being removed. Free up the current card.
  */
@@ -1322,11 +1362,11 @@ static int mmc_suspend(struct mmc_host *host)
 	BUG_ON(!host->card);
 
 	mmc_claim_host(host);
-	if (mmc_card_can_sleep(host)) {
+	if (mmc_can_poweroff_notify(host->card))
+		err = mmc_poweroff_notify(host->card, EXT_CSD_POWER_OFF_SHORT);
+	else if (mmc_card_can_sleep(host))
 		err = mmc_card_sleep(host);
-		if (!err)
-			mmc_card_set_sleep(host->card);
-	} else if (!mmc_host_is_spi(host))
+	else if (!mmc_host_is_spi(host))
 		err = mmc_deselect_cards(host);
 	host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
 	mmc_release_host(host);
@@ -1348,11 +1388,7 @@ static int mmc_resume(struct mmc_host *host)
 	BUG_ON(!host->card);
 
 	mmc_claim_host(host);
-	if (mmc_card_is_sleep(host->card)) {
-		err = mmc_card_awake(host);
-		mmc_card_clr_sleep(host->card);
-	} else
-		err = mmc_init_card(host, host->ocr, host->card);
+	err = mmc_init_card(host, host->ocr, host->card);
 	mmc_release_host(host);
 
 	return err;
@@ -1363,7 +1399,6 @@ static int mmc_power_restore(struct mmc_host *host)
 	int ret;
 
 	host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
-	mmc_card_clr_sleep(host->card);
 	mmc_claim_host(host);
 	ret = mmc_init_card(host, host->ocr, host->card);
 	mmc_release_host(host);

drivers/mmc/core/mmc_ops.c

@@ -230,6 +230,10 @@ mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
 	return 0;
 }
 
+/*
+ * NOTE: void *buf, caller for the buf is required to use DMA-capable
+ * buffer or on-stack buffer (with some overhead in callee).
+ */
 static int
 mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 		u32 opcode, void *buf, unsigned len)
@@ -239,13 +243,19 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 	struct mmc_data data = {0};
 	struct scatterlist sg;
 	void *data_buf;
+	int is_on_stack;
 
-	/* dma onto stack is unsafe/nonportable, but callers to this
-	 * routine normally provide temporary on-stack buffers ...
-	 */
-	data_buf = kmalloc(len, GFP_KERNEL);
-	if (data_buf == NULL)
-		return -ENOMEM;
+	is_on_stack = object_is_on_stack(buf);
+	if (is_on_stack) {
+		/*
+		 * dma onto stack is unsafe/nonportable, but callers to this
+		 * routine normally provide temporary on-stack buffers ...
+		 */
+		data_buf = kmalloc(len, GFP_KERNEL);
+		if (!data_buf)
+			return -ENOMEM;
+	} else
+		data_buf = buf;
 
 	mrq.cmd = &cmd;
 	mrq.data = &data;
@@ -280,8 +290,10 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 
 	mmc_wait_for_req(host, &mrq);
 
-	memcpy(buf, data_buf, len);
-	kfree(data_buf);
+	if (is_on_stack) {
+		memcpy(buf, data_buf, len);
+		kfree(data_buf);
+	}
 
 	if (cmd.error)
 		return cmd.error;
@@ -294,24 +306,32 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 int mmc_send_csd(struct mmc_card *card, u32 *csd)
 {
 	int ret, i;
+	u32 *csd_tmp;
 
 	if (!mmc_host_is_spi(card->host))
 		return mmc_send_cxd_native(card->host, card->rca << 16,
 				csd, MMC_SEND_CSD);
 
-	ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16);
+	csd_tmp = kmalloc(16, GFP_KERNEL);
+	if (!csd_tmp)
+		return -ENOMEM;
+
+	ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16);
 	if (ret)
-		return ret;
+		goto err;
 
 	for (i = 0;i < 4;i++)
-		csd[i] = be32_to_cpu(csd[i]);
+		csd[i] = be32_to_cpu(csd_tmp[i]);
 
-	return 0;
+err:
+	kfree(csd_tmp);
+	return ret;
 }
 
 int mmc_send_cid(struct mmc_host *host, u32 *cid)
 {
 	int ret, i;
+	u32 *cid_tmp;
 
 	if (!mmc_host_is_spi(host)) {
 		if (!host->card)
@@ -320,14 +340,20 @@ int mmc_send_cid(struct mmc_host *host, u32 *cid)
 				cid, MMC_SEND_CID);
 	}
 
-	ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16);
+	cid_tmp = kmalloc(16, GFP_KERNEL);
+	if (!cid_tmp)
+		return -ENOMEM;
+
+	ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16);
 	if (ret)
-		return ret;
+		goto err;
 
 	for (i = 0;i < 4;i++)
-		cid[i] = be32_to_cpu(cid[i]);
+		cid[i] = be32_to_cpu(cid_tmp[i]);
 
-	return 0;
+err:
+	kfree(cid_tmp);
+	return ret;
 }
 
 int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
@@ -367,18 +393,19 @@ int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
 }
 
 /**
- *	mmc_switch - modify EXT_CSD register
+ *	__mmc_switch - modify EXT_CSD register
  *	@card: the MMC card associated with the data transfer
  *	@set: cmd set values
  *	@index: EXT_CSD register index
  *	@value: value to program into EXT_CSD register
  *	@timeout_ms: timeout (ms) for operation performed by register write,
  *                   timeout of zero implies maximum possible timeout
+ *	@use_busy_signal: use the busy signal as response type
  *
  *	Modifies the EXT_CSD register for selected card.
  */
-int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
-	       unsigned int timeout_ms)
+int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+	       unsigned int timeout_ms, bool use_busy_signal)
 {
 	int err;
 	struct mmc_command cmd = {0};
@@ -392,13 +419,23 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
 		  (index << 16) |
 		  (value << 8) |
 		  set;
-	cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+	cmd.flags = MMC_CMD_AC;
+	if (use_busy_signal)
+		cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
+	else
+		cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
+
+
 	cmd.cmd_timeout_ms = timeout_ms;
 
 	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
 	if (err)
 		return err;
 
+	/* No need to check card status in case of unblocking command */
+	if (!use_busy_signal)
+		return 0;
+
 	/* Must check status to be sure of no errors */
 	do {
 		err = mmc_send_status(card, &status);
@@ -423,6 +460,13 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(__mmc_switch);
+
+int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+		unsigned int timeout_ms)
+{
+	return __mmc_switch(card, set, index, value, timeout_ms, true);
+}
 EXPORT_SYMBOL_GPL(mmc_switch);
 
 int mmc_send_status(struct mmc_card *card, u32 *status)

drivers/mmc/core/sdio_bus.c

@@ -193,14 +193,7 @@ static int sdio_bus_remove(struct device *dev)
 }
 
 #ifdef CONFIG_PM
-
-static int pm_no_operation(struct device *dev)
-{
-	return 0;
-}
-
 static const struct dev_pm_ops sdio_bus_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(pm_no_operation, pm_no_operation)
 	SET_RUNTIME_PM_OPS(
 		pm_generic_runtime_suspend,
 		pm_generic_runtime_resume,

drivers/mmc/core/slot-gpio.c

@@ -100,7 +100,13 @@ int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio)
 
 	ctx = host->slot.handler_priv;
 
-	return gpio_request_one(gpio, GPIOF_DIR_IN, ctx->ro_label);
+	ret = gpio_request_one(gpio, GPIOF_DIR_IN, ctx->ro_label);
+	if (ret < 0)
+		return ret;
+
+	ctx->ro_gpio = gpio;
+
+	return 0;
 }
 EXPORT_SYMBOL(mmc_gpio_request_ro);
 

drivers/mmc/host/Kconfig

@@ -540,6 +540,15 @@ config MMC_DW_PLTFM
 
 	  If unsure, say Y.
 
+config MMC_DW_EXYNOS
+	tristate "Exynos specific extentions for Synopsys DW Memory Card Interface"
+	depends on MMC_DW
+	select MMC_DW_PLTFM
+	help
+	  This selects support for Samsung Exynos SoC specific extensions to the
+	  Synopsys DesignWare Memory Card Interface driver. Select this option
+	  for platforms based on Exynos4 and Exynos5 SoC's.
+
 config MMC_DW_PCI
 	tristate "Synopsys Designware MCI support on PCI bus"
 	depends on MMC_DW && PCI

drivers/mmc/host/Makefile

@@ -39,6 +39,7 @@ obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
 obj-$(CONFIG_MMC_DW)		+= dw_mmc.o
 obj-$(CONFIG_MMC_DW_PLTFM)	+= dw_mmc-pltfm.o
+obj-$(CONFIG_MMC_DW_EXYNOS)	+= dw_mmc-exynos.o
 obj-$(CONFIG_MMC_DW_PCI)	+= dw_mmc-pci.o
 obj-$(CONFIG_MMC_SH_MMCIF)	+= sh_mmcif.o
 obj-$(CONFIG_MMC_JZ4740)	+= jz4740_mmc.o

drivers/mmc/host/atmel-mci-regs.h

@@ -140,6 +140,13 @@
 #define atmci_writel(port,reg,value)			\
 	__raw_writel((value), (port)->regs + reg)
 
+/* On AVR chips the Peripheral DMA Controller is not connected to MCI. */
+#ifdef CONFIG_AVR32
+#	define ATMCI_PDC_CONNECTED	0
+#else
+#	define ATMCI_PDC_CONNECTED	1
+#endif
+
 /*
  * Fix sconfig's burst size according to atmel MCI. We need to convert them as:
  * 1 -> 0, 4 -> 1, 8 -> 2, 16 -> 3.

drivers/mmc/host/atmel-mci.c

@@ -19,6 +19,9 @@
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/scatterlist.h>
 #include <linux/seq_file.h>
@@ -71,7 +74,7 @@ enum atmci_pdc_buf {
 };
 
 struct atmel_mci_caps {
-	bool    has_dma;
+	bool    has_dma_conf_reg;
 	bool    has_pdc;
 	bool    has_cfg_reg;
 	bool    has_cstor_reg;
@@ -418,7 +421,7 @@ static int atmci_regs_show(struct seq_file *s, void *v)
 	atmci_show_status_reg(s, "SR", buf[ATMCI_SR / 4]);
 	atmci_show_status_reg(s, "IMR", buf[ATMCI_IMR / 4]);
 
-	if (host->caps.has_dma) {
+	if (host->caps.has_dma_conf_reg) {
 		u32 val;
 
 		val = buf[ATMCI_DMA / 4];
@@ -500,6 +503,70 @@ static void atmci_init_debugfs(struct atmel_mci_slot *slot)
 	dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n");
 }
 
+#if defined(CONFIG_OF)
+static const struct of_device_id atmci_dt_ids[] = {
+	{ .compatible = "atmel,hsmci" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, atmci_dt_ids);
+
+static struct mci_platform_data __devinit*
+atmci_of_init(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *cnp;
+	struct mci_platform_data *pdata;
+	u32 slot_id;
+
+	if (!np) {
+		dev_err(&pdev->dev, "device node not found\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata) {
+		dev_err(&pdev->dev, "could not allocate memory for pdata\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	for_each_child_of_node(np, cnp) {
+		if (of_property_read_u32(cnp, "reg", &slot_id)) {
+			dev_warn(&pdev->dev, "reg property is missing for %s\n",
+				 cnp->full_name);
+			continue;
+		}
+
+		if (slot_id >= ATMCI_MAX_NR_SLOTS) {
+			dev_warn(&pdev->dev, "can't have more than %d slots\n",
+			         ATMCI_MAX_NR_SLOTS);
+			break;
+		}
+
+		if (of_property_read_u32(cnp, "bus-width",
+		                         &pdata->slot[slot_id].bus_width))
+			pdata->slot[slot_id].bus_width = 1;
+
+		pdata->slot[slot_id].detect_pin =
+			of_get_named_gpio(cnp, "cd-gpios", 0);
+
+		pdata->slot[slot_id].detect_is_active_high =
+			of_property_read_bool(cnp, "cd-inverted");
+
+		pdata->slot[slot_id].wp_pin =
+			of_get_named_gpio(cnp, "wp-gpios", 0);
+	}
+
+	return pdata;
+}
+#else /* CONFIG_OF */
+static inline struct mci_platform_data*
+atmci_of_init(struct platform_device *dev)
+{
+	return ERR_PTR(-EINVAL);
+}
+#endif
+
 static inline unsigned int atmci_get_version(struct atmel_mci *host)
 {
 	return atmci_readl(host, ATMCI_VERSION) & 0x00000fff;
@@ -774,7 +841,7 @@ static void atmci_dma_complete(void *arg)
 
 	dev_vdbg(&host->pdev->dev, "DMA complete\n");
 
-	if (host->caps.has_dma)
+	if (host->caps.has_dma_conf_reg)
 		/* Disable DMA hardware handshaking on MCI */
 		atmci_writel(host, ATMCI_DMA, atmci_readl(host, ATMCI_DMA) & ~ATMCI_DMAEN);
 
@@ -961,7 +1028,9 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data)
 		maxburst = atmci_convert_chksize(host->dma_conf.dst_maxburst);
 	}
 
-	atmci_writel(host, ATMCI_DMA, ATMCI_DMA_CHKSIZE(maxburst) | ATMCI_DMAEN);
+	if (host->caps.has_dma_conf_reg)
+		atmci_writel(host, ATMCI_DMA, ATMCI_DMA_CHKSIZE(maxburst) |
+			ATMCI_DMAEN);
 
 	sglen = dma_map_sg(chan->device->dev, data->sg,
 			data->sg_len, direction);
@@ -2046,6 +2115,13 @@ static int __init atmci_init_slot(struct atmel_mci *host,
 	slot->sdc_reg = sdc_reg;
 	slot->sdio_irq = sdio_irq;
 
+	dev_dbg(&mmc->class_dev,
+	        "slot[%u]: bus_width=%u, detect_pin=%d, "
+		"detect_is_active_high=%s, wp_pin=%d\n",
+		id, slot_data->bus_width, slot_data->detect_pin,
+		slot_data->detect_is_active_high ? "true" : "false",
+		slot_data->wp_pin);
+
 	mmc->ops = &atmci_ops;
 	mmc->f_min = DIV_ROUND_UP(host->bus_hz, 512);
 	mmc->f_max = host->bus_hz / 2;
@@ -2169,7 +2245,10 @@ static bool atmci_configure_dma(struct atmel_mci *host)
 
 	pdata = host->pdev->dev.platform_data;
 
-	if (pdata && find_slave_dev(pdata->dma_slave)) {
+	if (!pdata)
+		return false;
+
+	if (pdata->dma_slave && find_slave_dev(pdata->dma_slave)) {
 		dma_cap_mask_t mask;
 
 		/* Try to grab a DMA channel */
@@ -2210,8 +2289,8 @@ static void __init atmci_get_cap(struct atmel_mci *host)
 	dev_info(&host->pdev->dev,
 			"version: 0x%x\n", version);
 
-	host->caps.has_dma = 0;
-	host->caps.has_pdc = 1;
+	host->caps.has_dma_conf_reg = 0;
+	host->caps.has_pdc = ATMCI_PDC_CONNECTED;
 	host->caps.has_cfg_reg = 0;
 	host->caps.has_cstor_reg = 0;
 	host->caps.has_highspeed = 0;
@@ -2228,12 +2307,7 @@ static void __init atmci_get_cap(struct atmel_mci *host)
 		host->caps.has_odd_clk_div = 1;
 	case 0x400:
 	case 0x300:
-#ifdef CONFIG_AT_HDMAC
-		host->caps.has_dma = 1;
-#else
-		dev_info(&host->pdev->dev,
-			"has dma capability but dma engine is not selected, then use pio\n");
-#endif
+		host->caps.has_dma_conf_reg = 1;
 		host->caps.has_pdc = 0;
 		host->caps.has_cfg_reg = 1;
 		host->caps.has_cstor_reg = 1;
@@ -2268,8 +2342,14 @@ static int __init atmci_probe(struct platform_device *pdev)
 	if (!regs)
 		return -ENXIO;
 	pdata = pdev->dev.platform_data;
-	if (!pdata)
-		return -ENXIO;
+	if (!pdata) {
+		pdata = atmci_of_init(pdev);
+		if (IS_ERR(pdata)) {
+			dev_err(&pdev->dev, "platform data not available\n");
+			return PTR_ERR(pdata);
+		}
+	}
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
@@ -2308,7 +2388,7 @@ static int __init atmci_probe(struct platform_device *pdev)
 
 	/* Get MCI capabilities and set operations according to it */
 	atmci_get_cap(host);
-	if (host->caps.has_dma && atmci_configure_dma(host)) {
+	if (atmci_configure_dma(host)) {
 		host->prepare_data = &atmci_prepare_data_dma;
 		host->submit_data = &atmci_submit_data_dma;
 		host->stop_transfer = &atmci_stop_transfer_dma;
@@ -2487,6 +2567,7 @@ static struct platform_driver atmci_driver = {
 	.driver		= {
 		.name		= "atmel_mci",
 		.pm		= ATMCI_PM_OPS,
+		.of_match_table	= of_match_ptr(atmci_dt_ids),
 	},
 };
 

drivers/mmc/host/bfin_sdh.c

@@ -24,9 +24,7 @@
 #include <asm/portmux.h>
 #include <asm/bfin_sdh.h>
 
-#if defined(CONFIG_BF51x)
-#define bfin_read_SDH_PWR_CTL		bfin_read_RSI_PWR_CTL
-#define bfin_write_SDH_PWR_CTL		bfin_write_RSI_PWR_CTL
+#if defined(CONFIG_BF51x) || defined(__ADSPBF60x__)
 #define bfin_read_SDH_CLK_CTL		bfin_read_RSI_CLK_CTL
 #define bfin_write_SDH_CLK_CTL		bfin_write_RSI_CLK_CTL
 #define bfin_write_SDH_ARGUMENT		bfin_write_RSI_ARGUMENT
@@ -45,8 +43,16 @@
 #define bfin_write_SDH_E_STATUS		bfin_write_RSI_E_STATUS
 #define bfin_read_SDH_STATUS		bfin_read_RSI_STATUS
 #define bfin_write_SDH_MASK0		bfin_write_RSI_MASK0
+#define bfin_write_SDH_E_MASK		bfin_write_RSI_E_MASK
 #define bfin_read_SDH_CFG		bfin_read_RSI_CFG
 #define bfin_write_SDH_CFG		bfin_write_RSI_CFG
+# if defined(__ADSPBF60x__)
+#  define bfin_read_SDH_BLK_SIZE	bfin_read_RSI_BLKSZ
+#  define bfin_write_SDH_BLK_SIZE	bfin_write_RSI_BLKSZ
+# else
+#  define bfin_read_SDH_PWR_CTL		bfin_read_RSI_PWR_CTL
+#  define bfin_write_SDH_PWR_CTL	bfin_write_RSI_PWR_CTL
+# endif
 #endif
 
 struct sdh_host {
@@ -62,6 +68,7 @@ struct sdh_host {
 	dma_addr_t		sg_dma;
 	int			dma_len;
 
+	unsigned long		sclk;
 	unsigned int		imask;
 	unsigned int		power_mode;
 	unsigned int		clk_div;
@@ -127,11 +134,15 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data)
 	/* Only supports power-of-2 block size */
 	if (data->blksz & (data->blksz - 1))
 		return -EINVAL;
+#ifndef RSI_BLKSZ
 	data_ctl |= ((ffs(data->blksz) - 1) << 4);
+#else
+        bfin_write_SDH_BLK_SIZE(data->blksz);
+#endif
 
 	bfin_write_SDH_DATA_CTL(data_ctl);
 	/* the time of a host clock period in ns */
-	cycle_ns = 1000000000 / (get_sclk() / (2 * (host->clk_div + 1)));
+	cycle_ns = 1000000000 / (host->sclk / (2 * (host->clk_div + 1)));
 	timeout = data->timeout_ns / cycle_ns;
 	timeout += data->timeout_clks;
 	bfin_write_SDH_DATA_TIMER(timeout);
@@ -145,8 +156,13 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data)
 
 	sdh_enable_stat_irq(host, (DAT_CRC_FAIL | DAT_TIME_OUT | DAT_END));
 	host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, host->dma_dir);
-#if defined(CONFIG_BF54x)
-	dma_cfg |= DMAFLOW_ARRAY | NDSIZE_5 | RESTART | WDSIZE_32 | DMAEN;
+#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x)
+	dma_cfg |= DMAFLOW_ARRAY | RESTART | WDSIZE_32 | DMAEN;
+# ifdef RSI_BLKSZ
+	dma_cfg |= PSIZE_32 | NDSIZE_3;
+# else
+	dma_cfg |= NDSIZE_5;
+# endif
 	{
 		struct scatterlist *sg;
 		int i;
@@ -156,7 +172,7 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data)
 			host->sg_cpu[i].x_count = sg_dma_len(sg) / 4;
 			host->sg_cpu[i].x_modify = 4;
 			dev_dbg(mmc_dev(host->mmc), "%d: start_addr:0x%lx, "
-				"cfg:0x%x, x_count:0x%x, x_modify:0x%x\n",
+				"cfg:0x%lx, x_count:0x%lx, x_modify:0x%lx\n",
 				i, host->sg_cpu[i].start_addr,
 				host->sg_cpu[i].cfg, host->sg_cpu[i].x_count,
 				host->sg_cpu[i].x_modify);
@@ -172,6 +188,7 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data)
 	set_dma_curr_desc_addr(host->dma_ch, (unsigned long *)host->sg_dma);
 	set_dma_x_count(host->dma_ch, 0);
 	set_dma_x_modify(host->dma_ch, 0);
+	SSYNC();
 	set_dma_config(host->dma_ch, dma_cfg);
 #elif defined(CONFIG_BF51x)
 	/* RSI DMA doesn't work in array mode */
@@ -179,6 +196,7 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data)
 	set_dma_start_addr(host->dma_ch, sg_dma_address(&data->sg[0]));
 	set_dma_x_count(host->dma_ch, length / 4);
 	set_dma_x_modify(host->dma_ch, 4);
+	SSYNC();
 	set_dma_config(host->dma_ch, dma_cfg);
 #endif
 	bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);
@@ -296,7 +314,6 @@ static int sdh_data_done(struct sdh_host *host, unsigned int stat)
 	else
 		data->bytes_xfered = 0;
 
-	sdh_disable_stat_irq(host, DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN | TX_UNDERRUN);
 	bfin_write_SDH_STATUS_CLR(DAT_END_STAT | DAT_TIMEOUT_STAT | \
 			DAT_CRC_FAIL_STAT | DAT_BLK_END_STAT | RX_OVERRUN | TX_UNDERRUN);
 	bfin_write_SDH_DATA_CTL(0);
@@ -321,74 +338,115 @@ static void sdh_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	dev_dbg(mmc_dev(host->mmc), "%s enter, mrp:%p, cmd:%p\n", __func__, mrq, mrq->cmd);
 	WARN_ON(host->mrq != NULL);
 
+	spin_lock(&host->lock);
 	host->mrq = mrq;
 	host->data = mrq->data;
 
 	if (mrq->data && mrq->data->flags & MMC_DATA_READ) {
 		ret = sdh_setup_data(host, mrq->data);
 		if (ret)
-			return;
+			goto data_err;
 	}
 
 	sdh_start_cmd(host, mrq->cmd);
+data_err:
+	spin_unlock(&host->lock);
 }
 
 static void sdh_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct sdh_host *host;
-	unsigned long flags;
 	u16 clk_ctl = 0;
+#ifndef RSI_BLKSZ
 	u16 pwr_ctl = 0;
+#endif
 	u16 cfg;
 	host = mmc_priv(mmc);
 
-	spin_lock_irqsave(&host->lock, flags);
-	if (ios->clock) {
-		unsigned long  sys_clk, ios_clk;
-		unsigned char clk_div;
-		ios_clk = 2 * ios->clock;
-		sys_clk = get_sclk();
-		clk_div = sys_clk / ios_clk;
-		if (sys_clk % ios_clk == 0)
-			clk_div -= 1;
-		clk_div = min_t(unsigned char, clk_div, 0xFF);
-		clk_ctl |= clk_div;
-		clk_ctl |= CLK_E;
-		host->clk_div = clk_div;
-	} else
-		sdh_stop_clock(host);
-
-	if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
-#ifdef CONFIG_SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND
-		pwr_ctl |= ROD_CTL;
-#else
-		pwr_ctl |= SD_CMD_OD | ROD_CTL;
-#endif
+	spin_lock(&host->lock);
 
-	if (ios->bus_width == MMC_BUS_WIDTH_4) {
-		cfg = bfin_read_SDH_CFG();
+	cfg = bfin_read_SDH_CFG();
+	cfg |= MWE;
+	switch (ios->bus_width) {
+	case MMC_BUS_WIDTH_4:
+#ifndef RSI_BLKSZ
 		cfg &= ~PD_SDDAT3;
+#endif
 		cfg |= PUP_SDDAT3;
 		/* Enable 4 bit SDIO */
-		cfg |= (SD4E | MWE);
-		bfin_write_SDH_CFG(cfg);
-		clk_ctl |= WIDE_BUS;
-	} else {
-		cfg = bfin_read_SDH_CFG();
-		cfg |= MWE;
-		bfin_write_SDH_CFG(cfg);
+		cfg |= SD4E;
+		clk_ctl |= WIDE_BUS_4;
+		break;
+	case MMC_BUS_WIDTH_8:
+#ifndef RSI_BLKSZ
+		cfg &= ~PD_SDDAT3;
+#endif
+		cfg |= PUP_SDDAT3;
+		/* Disable 4 bit SDIO */
+		cfg &= ~SD4E;
+		clk_ctl |= BYTE_BUS_8;
+		break;
+	default:
+		cfg &= ~PUP_SDDAT3;
+		/* Disable 4 bit SDIO */
+		cfg &= ~SD4E;
 	}
 
-	bfin_write_SDH_CLK_CTL(clk_ctl);
-
 	host->power_mode = ios->power_mode;
-	if (ios->power_mode == MMC_POWER_ON)
+#ifndef RSI_BLKSZ
+	if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) {
+		pwr_ctl |= ROD_CTL;
+# ifndef CONFIG_SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND
+		pwr_ctl |= SD_CMD_OD;
+# endif
+	}
+
+	if (ios->power_mode != MMC_POWER_OFF)
 		pwr_ctl |= PWR_ON;
+	else
+		pwr_ctl &= ~PWR_ON;
 
 	bfin_write_SDH_PWR_CTL(pwr_ctl);
+#else
+# ifndef CONFIG_SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND
+	if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
+		cfg |= SD_CMD_OD;
+	else
+		cfg &= ~SD_CMD_OD;
+# endif
+
+
+	if (ios->power_mode != MMC_POWER_OFF)
+		cfg |= PWR_ON;
+	else
+		cfg &= ~PWR_ON;
+
+	bfin_write_SDH_CFG(cfg);
+#endif
 	SSYNC();
 
-	spin_unlock_irqrestore(&host->lock, flags);
+	if (ios->power_mode == MMC_POWER_ON && ios->clock) {
+		unsigned char clk_div;
+		clk_div = (get_sclk() / ios->clock - 1) / 2;
+		clk_div = min_t(unsigned char, clk_div, 0xFF);
+		clk_ctl |= clk_div;
+		clk_ctl |= CLK_E;
+		host->clk_div = clk_div;
+		bfin_write_SDH_CLK_CTL(clk_ctl);
+
+	} else
+		sdh_stop_clock(host);
+
+	/* set up sdh interrupt mask*/
+	if (ios->power_mode == MMC_POWER_ON)
+		bfin_write_SDH_MASK0(DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL |
+			RX_OVERRUN | TX_UNDERRUN | CMD_SENT | CMD_RESP_END |
+			CMD_TIME_OUT | CMD_CRC_FAIL);
+	else
+		bfin_write_SDH_MASK0(0);
+	SSYNC();
+
+	spin_unlock(&host->lock);
 
 	dev_dbg(mmc_dev(host->mmc), "SDH: clk_div = 0x%x actual clock:%ld expected clock:%d\n",
 		host->clk_div,
@@ -405,7 +463,7 @@ static irqreturn_t sdh_dma_irq(int irq, void *devid)
 {
 	struct sdh_host *host = devid;
 
-	dev_dbg(mmc_dev(host->mmc), "%s enter, irq_stat: 0x%04x\n", __func__,
+	dev_dbg(mmc_dev(host->mmc), "%s enter, irq_stat: 0x%04lx\n", __func__,
 		get_dma_curr_irqstat(host->dma_ch));
 	clear_dma_irqstat(host->dma_ch);
 	SSYNC();
@@ -420,6 +478,9 @@ static irqreturn_t sdh_stat_irq(int irq, void *devid)
 	int handled = 0;
 
 	dev_dbg(mmc_dev(host->mmc), "%s enter\n", __func__);
+
+	spin_lock(&host->lock);
+
 	status = bfin_read_SDH_E_STATUS();
 	if (status & SD_CARD_DET) {
 		mmc_detect_change(host->mmc, 0);
@@ -437,11 +498,30 @@ static irqreturn_t sdh_stat_irq(int irq, void *devid)
 	if (status & (DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN | TX_UNDERRUN))
 		handled |= sdh_data_done(host, status);
 
+	spin_unlock(&host->lock);
+
 	dev_dbg(mmc_dev(host->mmc), "%s exit\n\n", __func__);
 
 	return IRQ_RETVAL(handled);
 }
 
+static void sdh_reset(void)
+{
+#if defined(CONFIG_BF54x)
+	/* Secure Digital Host shares DMA with Nand controller */
+	bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1);
+#endif
+
+	bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN);
+	SSYNC();
+
+	/* Disable card inserting detection pin. set MMC_CAP_NEEDS_POLL, and
+	 * mmc stack will do the detection.
+	 */
+	bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3));
+	SSYNC();
+}
+
 static int __devinit sdh_probe(struct platform_device *pdev)
 {
 	struct mmc_host *mmc;
@@ -462,8 +542,16 @@ static int __devinit sdh_probe(struct platform_device *pdev)
 	}
 
 	mmc->ops = &sdh_ops;
-	mmc->max_segs = 32;
+#if defined(CONFIG_BF51x)
+	mmc->max_segs = 1;
+#else
+	mmc->max_segs = PAGE_SIZE / sizeof(struct dma_desc_array);
+#endif
+#ifdef RSI_BLKSZ
+	mmc->max_seg_size = -1;
+#else
 	mmc->max_seg_size = 1 << 16;
+#endif
 	mmc->max_blk_size = 1 << 11;
 	mmc->max_blk_count = 1 << 11;
 	mmc->max_req_size = PAGE_SIZE;
@@ -473,6 +561,7 @@ static int __devinit sdh_probe(struct platform_device *pdev)
 	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_NEEDS_POLL;
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
+	host->sclk = get_sclk();
 
 	spin_lock_init(&host->lock);
 	host->irq = drv_data->irq_int0;
@@ -497,7 +586,6 @@ static int __devinit sdh_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, mmc);
-	mmc_add_host(mmc);
 
 	ret = request_irq(host->irq, sdh_stat_irq, 0, "SDH Status IRQ", host);
 	if (ret) {
@@ -510,20 +598,10 @@ static int __devinit sdh_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "unable to request peripheral pins\n");
 		goto out4;
 	}
-#if defined(CONFIG_BF54x)
-	/* Secure Digital Host shares DMA with Nand controller */
-	bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1);
-#endif
-
-	bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN);
-	SSYNC();
 
-	/* Disable card inserting detection pin. set MMC_CAP_NEES_POLL, and
-	 * mmc stack will do the detection.
-	 */
-	bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3));
-	SSYNC();
+	sdh_reset();
 
+	mmc_add_host(mmc);
 	return 0;
 
 out4:
@@ -571,7 +649,6 @@ static int sdh_suspend(struct platform_device *dev, pm_message_t state)
 	if (mmc)
 		ret = mmc_suspend_host(mmc);
 
-	bfin_write_SDH_PWR_CTL(bfin_read_SDH_PWR_CTL() & ~PWR_ON);
 	peripheral_free_list(drv_data->pin_req);
 
 	return ret;
@@ -589,16 +666,7 @@ static int sdh_resume(struct platform_device *dev)
 		return ret;
 	}
 
-	bfin_write_SDH_PWR_CTL(bfin_read_SDH_PWR_CTL() | PWR_ON);
-#if defined(CONFIG_BF54x)
-	/* Secure Digital Host shares DMA with Nand controller */
-	bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1);
-#endif
-	bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN);
-	SSYNC();
-
-	bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3));
-	SSYNC();
+	sdh_reset();
 
 	if (mmc)
 		ret = mmc_resume_host(mmc);

drivers/mmc/host/davinci_mmc.c

@@ -30,11 +30,12 @@
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/delay.h>
+#include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
+#include <linux/edma.h>
 #include <linux/mmc/mmc.h>
 
 #include <linux/platform_data/mmc-davinci.h>
-#include <mach/edma.h>
 
 /*
  * Register Definitions
@@ -200,21 +201,13 @@ struct mmc_davinci_host {
 	u32 bytes_left;
 
 	u32 rxdma, txdma;
+	struct dma_chan *dma_tx;
+	struct dma_chan *dma_rx;
 	bool use_dma;
 	bool do_dma;
 	bool sdio_int;
 	bool active_request;
 
-	/* Scatterlist DMA uses one or more parameter RAM entries:
-	 * the main one (associated with rxdma or txdma) plus zero or
-	 * more links.  The entries for a given transfer differ only
-	 * by memory buffer (address, length) and link field.
-	 */
-	struct edmacc_param	tx_template;
-	struct edmacc_param	rx_template;
-	unsigned		n_link;
-	u32			links[MAX_NR_SG - 1];
-
 	/* For PIO we walk scatterlists one segment at a time. */
 	unsigned int		sg_len;
 	struct scatterlist *sg;
@@ -410,153 +403,74 @@ static void mmc_davinci_start_command(struct mmc_davinci_host *host,
 
 static void davinci_abort_dma(struct mmc_davinci_host *host)
 {
-	int sync_dev;
+	struct dma_chan *sync_dev;
 
 	if (host->data_dir == DAVINCI_MMC_DATADIR_READ)
-		sync_dev = host->rxdma;
+		sync_dev = host->dma_rx;
 	else
-		sync_dev = host->txdma;
-
-	edma_stop(sync_dev);
-	edma_clean_channel(sync_dev);
-}
-
-static void
-mmc_davinci_xfer_done(struct mmc_davinci_host *host, struct mmc_data *data);
-
-static void mmc_davinci_dma_cb(unsigned channel, u16 ch_status, void *data)
-{
-	if (DMA_COMPLETE != ch_status) {
-		struct mmc_davinci_host *host = data;
-
-		/* Currently means:  DMA Event Missed, or "null" transfer
-		 * request was seen.  In the future, TC errors (like bad
-		 * addresses) might be presented too.
-		 */
-		dev_warn(mmc_dev(host->mmc), "DMA %s error\n",
-			(host->data->flags & MMC_DATA_WRITE)
-				? "write" : "read");
-		host->data->error = -EIO;
-		mmc_davinci_xfer_done(host, host->data);
-	}
-}
-
-/* Set up tx or rx template, to be modified and updated later */
-static void __init mmc_davinci_dma_setup(struct mmc_davinci_host *host,
-		bool tx, struct edmacc_param *template)
-{
-	unsigned	sync_dev;
-	const u16	acnt = 4;
-	const u16	bcnt = rw_threshold >> 2;
-	const u16	ccnt = 0;
-	u32		src_port = 0;
-	u32		dst_port = 0;
-	s16		src_bidx, dst_bidx;
-	s16		src_cidx, dst_cidx;
-
-	/*
-	 * A-B Sync transfer:  each DMA request is for one "frame" of
-	 * rw_threshold bytes, broken into "acnt"-size chunks repeated
-	 * "bcnt" times.  Each segment needs "ccnt" such frames; since
-	 * we tell the block layer our mmc->max_seg_size limit, we can
-	 * trust (later) that it's within bounds.
-	 *
-	 * The FIFOs are read/written in 4-byte chunks (acnt == 4) and
-	 * EDMA will optimize memory operations to use larger bursts.
-	 */
-	if (tx) {
-		sync_dev = host->txdma;
-
-		/* src_prt, ccnt, and link to be set up later */
-		src_bidx = acnt;
-		src_cidx = acnt * bcnt;
-
-		dst_port = host->mem_res->start + DAVINCI_MMCDXR;
-		dst_bidx = 0;
-		dst_cidx = 0;
-	} else {
-		sync_dev = host->rxdma;
-
-		src_port = host->mem_res->start + DAVINCI_MMCDRR;
-		src_bidx = 0;
-		src_cidx = 0;
-
-		/* dst_prt, ccnt, and link to be set up later */
-		dst_bidx = acnt;
-		dst_cidx = acnt * bcnt;
-	}
-
-	/*
-	 * We can't use FIFO mode for the FIFOs because MMC FIFO addresses
-	 * are not 256-bit (32-byte) aligned.  So we use INCR, and the W8BIT
-	 * parameter is ignored.
-	 */
-	edma_set_src(sync_dev, src_port, INCR, W8BIT);
-	edma_set_dest(sync_dev, dst_port, INCR, W8BIT);
+		sync_dev = host->dma_tx;
 
-	edma_set_src_index(sync_dev, src_bidx, src_cidx);
-	edma_set_dest_index(sync_dev, dst_bidx, dst_cidx);
-
-	edma_set_transfer_params(sync_dev, acnt, bcnt, ccnt, 8, ABSYNC);
-
-	edma_read_slot(sync_dev, template);
-
-	/* don't bother with irqs or chaining */
-	template->opt |= EDMA_CHAN_SLOT(sync_dev) << 12;
+	dmaengine_terminate_all(sync_dev);
 }
 
-static void mmc_davinci_send_dma_request(struct mmc_davinci_host *host,
+static int mmc_davinci_send_dma_request(struct mmc_davinci_host *host,
 		struct mmc_data *data)
 {
-	struct edmacc_param	*template;
-	int			channel, slot;
-	unsigned		link;
-	struct scatterlist	*sg;
-	unsigned		sg_len;
-	unsigned		bytes_left = host->bytes_left;
-	const unsigned		shift = ffs(rw_threshold) - 1;
+	struct dma_chan *chan;
+	struct dma_async_tx_descriptor *desc;
+	int ret = 0;
 
 	if (host->data_dir == DAVINCI_MMC_DATADIR_WRITE) {
-		template = &host->tx_template;
-		channel = host->txdma;
+		struct dma_slave_config dma_tx_conf = {
+			.direction = DMA_MEM_TO_DEV,
+			.dst_addr = host->mem_res->start + DAVINCI_MMCDXR,
+			.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+			.dst_maxburst =
+				rw_threshold / DMA_SLAVE_BUSWIDTH_4_BYTES,
+		};
+		chan = host->dma_tx;
+		dmaengine_slave_config(host->dma_tx, &dma_tx_conf);
+
+		desc = dmaengine_prep_slave_sg(host->dma_tx,
+				data->sg,
+				host->sg_len,
+				DMA_MEM_TO_DEV,
+				DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+		if (!desc) {
+			dev_dbg(mmc_dev(host->mmc),
+				"failed to allocate DMA TX descriptor");
+			ret = -1;
+			goto out;
+		}
 	} else {
-		template = &host->rx_template;
-		channel = host->rxdma;
-	}
-
-	/* We know sg_len and ccnt will never be out of range because
-	 * we told the mmc layer which in turn tells the block layer
-	 * to ensure that it only hands us one scatterlist segment
-	 * per EDMA PARAM entry.  Update the PARAM
-	 * entries needed for each segment of this scatterlist.
-	 */
-	for (slot = channel, link = 0, sg = data->sg, sg_len = host->sg_len;
-			sg_len-- != 0 && bytes_left;
-			sg = sg_next(sg), slot = host->links[link++]) {
-		u32		buf = sg_dma_address(sg);
-		unsigned	count = sg_dma_len(sg);
-
-		template->link_bcntrld = sg_len
-				? (EDMA_CHAN_SLOT(host->links[link]) << 5)
-				: 0xffff;
-
-		if (count > bytes_left)
-			count = bytes_left;
-		bytes_left -= count;
-
-		if (host->data_dir == DAVINCI_MMC_DATADIR_WRITE)
-			template->src = buf;
-		else
-			template->dst = buf;
-		template->ccnt = count >> shift;
-
-		edma_write_slot(slot, template);
+		struct dma_slave_config dma_rx_conf = {
+			.direction = DMA_DEV_TO_MEM,
+			.src_addr = host->mem_res->start + DAVINCI_MMCDRR,
+			.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
+			.src_maxburst =
+				rw_threshold / DMA_SLAVE_BUSWIDTH_4_BYTES,
+		};
+		chan = host->dma_rx;
+		dmaengine_slave_config(host->dma_rx, &dma_rx_conf);
+
+		desc = dmaengine_prep_slave_sg(host->dma_rx,
+				data->sg,
+				host->sg_len,
+				DMA_DEV_TO_MEM,
+				DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+		if (!desc) {
+			dev_dbg(mmc_dev(host->mmc),
+				"failed to allocate DMA RX descriptor");
+			ret = -1;
+			goto out;
+		}
 	}
 
-	if (host->version == MMC_CTLR_VERSION_2)
-		edma_clear_event(channel);
+	dmaengine_submit(desc);
+	dma_async_issue_pending(chan);
 
-	edma_start(channel);
+out:
+	return ret;
 }
 
 static int mmc_davinci_start_dma_transfer(struct mmc_davinci_host *host,
@@ -564,6 +478,7 @@ static int mmc_davinci_start_dma_transfer(struct mmc_davinci_host *host,
 {
 	int i;
 	int mask = rw_threshold - 1;
+	int ret = 0;
 
 	host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
 				((data->flags & MMC_DATA_WRITE)
@@ -583,70 +498,48 @@ static int mmc_davinci_start_dma_transfer(struct mmc_davinci_host *host,
 	}
 
 	host->do_dma = 1;
-	mmc_davinci_send_dma_request(host, data);
+	ret = mmc_davinci_send_dma_request(host, data);
 
-	return 0;
+	return ret;
 }
 
 static void __init_or_module
 davinci_release_dma_channels(struct mmc_davinci_host *host)
 {
-	unsigned	i;
-
 	if (!host->use_dma)
 		return;
 
-	for (i = 0; i < host->n_link; i++)
-		edma_free_slot(host->links[i]);
-
-	edma_free_channel(host->txdma);
-	edma_free_channel(host->rxdma);
+	dma_release_channel(host->dma_tx);
+	dma_release_channel(host->dma_rx);
 }
 
 static int __init davinci_acquire_dma_channels(struct mmc_davinci_host *host)
 {
-	u32 link_size;
-	int r, i;
-
-	/* Acquire master DMA write channel */
-	r = edma_alloc_channel(host->txdma, mmc_davinci_dma_cb, host,
-			EVENTQ_DEFAULT);
-	if (r < 0) {
-		dev_warn(mmc_dev(host->mmc), "alloc %s channel err %d\n",
-				"tx", r);
-		return r;
-	}
-	mmc_davinci_dma_setup(host, true, &host->tx_template);
-
-	/* Acquire master DMA read channel */
-	r = edma_alloc_channel(host->rxdma, mmc_davinci_dma_cb, host,
-			EVENTQ_DEFAULT);
-	if (r < 0) {
-		dev_warn(mmc_dev(host->mmc), "alloc %s channel err %d\n",
-				"rx", r);
-		goto free_master_write;
+	int r;
+	dma_cap_mask_t mask;
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	host->dma_tx =
+		dma_request_channel(mask, edma_filter_fn, &host->txdma);
+	if (!host->dma_tx) {
+		dev_err(mmc_dev(host->mmc), "Can't get dma_tx channel\n");
+		return -ENODEV;
 	}
-	mmc_davinci_dma_setup(host, false, &host->rx_template);
 
-	/* Allocate parameter RAM slots, which will later be bound to a
-	 * channel as needed to handle a scatterlist.
-	 */
-	link_size = min_t(unsigned, host->nr_sg, ARRAY_SIZE(host->links));
-	for (i = 0; i < link_size; i++) {
-		r = edma_alloc_slot(EDMA_CTLR(host->txdma), EDMA_SLOT_ANY);
-		if (r < 0) {
-			dev_dbg(mmc_dev(host->mmc), "dma PaRAM alloc --> %d\n",
-				r);
-			break;
-		}
-		host->links[i] = r;
+	host->dma_rx =
+		dma_request_channel(mask, edma_filter_fn, &host->rxdma);
+	if (!host->dma_rx) {
+		dev_err(mmc_dev(host->mmc), "Can't get dma_rx channel\n");
+		r = -ENODEV;
+		goto free_master_write;
 	}
-	host->n_link = i;
 
 	return 0;
 
 free_master_write:
-	edma_free_channel(host->txdma);
+	dma_release_channel(host->dma_tx);
 
 	return r;
 }
@@ -1359,7 +1252,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 	 * Each hw_seg uses one EDMA parameter RAM slot, always one
 	 * channel and then usually some linked slots.
 	 */
-	mmc->max_segs		= 1 + host->n_link;
+	mmc->max_segs		= MAX_NR_SG;
 
 	/* EDMA limit per hw segment (one or two MBytes) */
 	mmc->max_seg_size	= MAX_CCNT * rw_threshold;

drivers/mmc/host/dw_mmc-exynos.c

+/*
+ * Exynos Specific Extensions for Synopsys DW Multimedia Card Interface driver
+ *
+ * Copyright (C) 2012, Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/dw_mmc.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+
+#include "dw_mmc.h"
+#include "dw_mmc-pltfm.h"
+
+#define NUM_PINS(x)			(x + 2)
+
+#define SDMMC_CLKSEL			0x09C
+#define SDMMC_CLKSEL_CCLK_SAMPLE(x)	(((x) & 7) << 0)
+#define SDMMC_CLKSEL_CCLK_DRIVE(x)	(((x) & 7) << 16)
+#define SDMMC_CLKSEL_CCLK_DIVIDER(x)	(((x) & 7) << 24)
+#define SDMMC_CLKSEL_GET_DRV_WD3(x)	(((x) >> 16) & 0x7)
+#define SDMMC_CLKSEL_TIMING(x, y, z)	(SDMMC_CLKSEL_CCLK_SAMPLE(x) |	\
+					SDMMC_CLKSEL_CCLK_DRIVE(y) |	\
+					SDMMC_CLKSEL_CCLK_DIVIDER(z))
+
+#define SDMMC_CMD_USE_HOLD_REG		BIT(29)
+
+#define EXYNOS4210_FIXED_CIU_CLK_DIV	2
+#define EXYNOS4412_FIXED_CIU_CLK_DIV	4
+
+/* Variations in Exynos specific dw-mshc controller */
+enum dw_mci_exynos_type {
+	DW_MCI_TYPE_EXYNOS4210,
+	DW_MCI_TYPE_EXYNOS4412,
+	DW_MCI_TYPE_EXYNOS5250,
+};
+
+/* Exynos implementation specific driver private data */
+struct dw_mci_exynos_priv_data {
+	enum dw_mci_exynos_type		ctrl_type;
+	u8				ciu_div;
+	u32				sdr_timing;
+	u32				ddr_timing;
+};
+
+static struct dw_mci_exynos_compatible {
+	char				*compatible;
+	enum dw_mci_exynos_type		ctrl_type;
+} exynos_compat[] = {
+	{
+		.compatible	= "samsung,exynos4210-dw-mshc",
+		.ctrl_type	= DW_MCI_TYPE_EXYNOS4210,
+	}, {
+		.compatible	= "samsung,exynos4412-dw-mshc",
+		.ctrl_type	= DW_MCI_TYPE_EXYNOS4412,
+	}, {
+		.compatible	= "samsung,exynos5250-dw-mshc",
+		.ctrl_type	= DW_MCI_TYPE_EXYNOS5250,
+	},
+};
+
+static int dw_mci_exynos_priv_init(struct dw_mci *host)
+{
+	struct dw_mci_exynos_priv_data *priv;
+	int idx;
+
+	priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		dev_err(host->dev, "mem alloc failed for private data\n");
+		return -ENOMEM;
+	}
+
+	for (idx = 0; idx < ARRAY_SIZE(exynos_compat); idx++) {
+		if (of_device_is_compatible(host->dev->of_node,
+					exynos_compat[idx].compatible))
+			priv->ctrl_type = exynos_compat[idx].ctrl_type;
+	}
+
+	host->priv = priv;
+	return 0;
+}
+
+static int dw_mci_exynos_setup_clock(struct dw_mci *host)
+{
+	struct dw_mci_exynos_priv_data *priv = host->priv;
+
+	if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5250)
+		host->bus_hz /= (priv->ciu_div + 1);
+	else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4412)
+		host->bus_hz /= EXYNOS4412_FIXED_CIU_CLK_DIV;
+	else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4210)
+		host->bus_hz /= EXYNOS4210_FIXED_CIU_CLK_DIV;
+
+	return 0;
+}
+
+static void dw_mci_exynos_prepare_command(struct dw_mci *host, u32 *cmdr)
+{
+	/*
+	 * Exynos4412 and Exynos5250 extends the use of CMD register with the
+	 * use of bit 29 (which is reserved on standard MSHC controllers) for
+	 * optionally bypassing the HOLD register for command and data. The
+	 * HOLD register should be bypassed in case there is no phase shift
+	 * applied on CMD/DATA that is sent to the card.
+	 */
+	if (SDMMC_CLKSEL_GET_DRV_WD3(mci_readl(host, CLKSEL)))
+		*cmdr |= SDMMC_CMD_USE_HOLD_REG;
+}
+
+static void dw_mci_exynos_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+	struct dw_mci_exynos_priv_data *priv = host->priv;
+
+	if (ios->timing == MMC_TIMING_UHS_DDR50)
+		mci_writel(host, CLKSEL, priv->ddr_timing);
+	else
+		mci_writel(host, CLKSEL, priv->sdr_timing);
+}
+
+static int dw_mci_exynos_parse_dt(struct dw_mci *host)
+{
+	struct dw_mci_exynos_priv_data *priv = host->priv;
+	struct device_node *np = host->dev->of_node;
+	u32 timing[2];
+	u32 div = 0;
+	int ret;
+
+	of_property_read_u32(np, "samsung,dw-mshc-ciu-div", &div);
+	priv->ciu_div = div;
+
+	ret = of_property_read_u32_array(np,
+			"samsung,dw-mshc-sdr-timing", timing, 2);
+	if (ret)
+		return ret;
+
+	priv->sdr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
+
+	ret = of_property_read_u32_array(np,
+			"samsung,dw-mshc-ddr-timing", timing, 2);
+	if (ret)
+		return ret;
+
+	priv->ddr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
+	return 0;
+}
+
+static int dw_mci_exynos_setup_bus(struct dw_mci *host,
+				struct device_node *slot_np, u8 bus_width)
+{
+	int idx, gpio, ret;
+
+	if (!slot_np)
+		return -EINVAL;
+
+	/* cmd + clock + bus-width pins */
+	for (idx = 0; idx < NUM_PINS(bus_width); idx++) {
+		gpio = of_get_gpio(slot_np, idx);
+		if (!gpio_is_valid(gpio)) {
+			dev_err(host->dev, "invalid gpio: %d\n", gpio);
+			return -EINVAL;
+		}
+
+		ret = devm_gpio_request(host->dev, gpio, "dw-mci-bus");
+		if (ret) {
+			dev_err(host->dev, "gpio [%d] request failed\n", gpio);
+			return -EBUSY;
+		}
+	}
+
+	gpio = of_get_named_gpio(slot_np, "wp-gpios", 0);
+	if (gpio_is_valid(gpio)) {
+		if (devm_gpio_request(host->dev, gpio, "dw-mci-wp"))
+			dev_info(host->dev, "gpio [%d] request failed\n",
+						gpio);
+	} else {
+		dev_info(host->dev, "wp gpio not available");
+		host->pdata->quirks |= DW_MCI_QUIRK_NO_WRITE_PROTECT;
+	}
+
+	if (host->pdata->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION)
+		return 0;
+
+	gpio = of_get_named_gpio(slot_np, "samsung,cd-pinmux-gpio", 0);
+	if (gpio_is_valid(gpio)) {
+		if (devm_gpio_request(host->dev, gpio, "dw-mci-cd"))
+			dev_err(host->dev, "gpio [%d] request failed\n", gpio);
+	} else {
+		dev_info(host->dev, "cd gpio not available");
+	}
+
+	return 0;
+}
+
+/* Exynos5250 controller specific capabilities */
+static unsigned long exynos5250_dwmmc_caps[4] = {
+	MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR |
+		MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23,
+	MMC_CAP_CMD23,
+	MMC_CAP_CMD23,
+	MMC_CAP_CMD23,
+};
+
+static struct dw_mci_drv_data exynos5250_drv_data = {
+	.caps			= exynos5250_dwmmc_caps,
+	.init			= dw_mci_exynos_priv_init,
+	.setup_clock		= dw_mci_exynos_setup_clock,
+	.prepare_command	= dw_mci_exynos_prepare_command,
+	.set_ios		= dw_mci_exynos_set_ios,
+	.parse_dt		= dw_mci_exynos_parse_dt,
+	.setup_bus		= dw_mci_exynos_setup_bus,
+};
+
+static const struct of_device_id dw_mci_exynos_match[] = {
+	{ .compatible = "samsung,exynos5250-dw-mshc",
+			.data = (void *)&exynos5250_drv_data, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
+
+int dw_mci_exynos_probe(struct platform_device *pdev)
+{
+	struct dw_mci_drv_data *drv_data;
+	const struct of_device_id *match;
+
+	match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
+	drv_data = match->data;
+	return dw_mci_pltfm_register(pdev, drv_data);
+}
+
+static struct platform_driver dw_mci_exynos_pltfm_driver = {
+	.probe		= dw_mci_exynos_probe,
+	.remove		= __exit_p(dw_mci_pltfm_remove),
+	.driver		= {
+		.name		= "dwmmc_exynos",
+		.of_match_table	= of_match_ptr(dw_mci_exynos_match),
+		.pm		= &dw_mci_pltfm_pmops,
+	},
+};
+
+module_platform_driver(dw_mci_exynos_pltfm_driver);
+
+MODULE_DESCRIPTION("Samsung Specific DW-MSHC Driver Extension");
+MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:dwmmc-exynos");

drivers/mmc/host/dw_mmc-pci.c

@@ -59,7 +59,7 @@ static int __devinit dw_mci_pci_probe(struct pci_dev *pdev,
 
 	host->irq = pdev->irq;
 	host->irq_flags = IRQF_SHARED;
-	host->dev = pdev->dev;
+	host->dev = &pdev->dev;
 	host->pdata = &pci_board_data;
 
 	host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR);
@@ -140,18 +140,7 @@ static struct pci_driver dw_mci_pci_driver = {
 	},
 };
 
-static int __init dw_mci_init(void)
-{
-	return pci_register_driver(&dw_mci_pci_driver);
-}
-
-static void __exit dw_mci_exit(void)
-{
-	pci_unregister_driver(&dw_mci_pci_driver);
-}
-
-module_init(dw_mci_init);
-module_exit(dw_mci_exit);
+module_pci_driver(dw_mci_pci_driver);
 
 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");

drivers/mmc/host/dw_mmc-pltfm.c

@@ -19,59 +19,63 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/dw_mmc.h>
+#include <linux/of.h>
+
 #include "dw_mmc.h"
 
-static int dw_mci_pltfm_probe(struct platform_device *pdev)
+int dw_mci_pltfm_register(struct platform_device *pdev,
+				struct dw_mci_drv_data *drv_data)
 {
 	struct dw_mci *host;
 	struct resource	*regs;
 	int ret;
 
-	host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
+	host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
 	if (!host)
 		return -ENOMEM;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		ret = -ENXIO;
-		goto err_free;
-	}
+	if (!regs)
+		return -ENXIO;
 
 	host->irq = platform_get_irq(pdev, 0);
-	if (host->irq < 0) {
-		ret = host->irq;
-		goto err_free;
-	}
+	if (host->irq < 0)
+		return host->irq;
 
-	host->dev = pdev->dev;
+	host->drv_data = drv_data;
+	host->dev = &pdev->dev;
 	host->irq_flags = 0;
 	host->pdata = pdev->dev.platform_data;
-	ret = -ENOMEM;
-	host->regs = ioremap(regs->start, resource_size(regs));
+	host->regs = devm_request_and_ioremap(&pdev->dev, regs);
 	if (!host->regs)
-		goto err_free;
+		return -ENOMEM;
+
+	if (host->drv_data->init) {
+		ret = host->drv_data->init(host);
+		if (ret)
+			return ret;
+	}
+
 	platform_set_drvdata(pdev, host);
 	ret = dw_mci_probe(host);
-	if (ret)
-		goto err_out;
-	return ret;
-err_out:
-	iounmap(host->regs);
-err_free:
-	kfree(host);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
 
-static int __exit dw_mci_pltfm_remove(struct platform_device *pdev)
+static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
+{
+	return dw_mci_pltfm_register(pdev, NULL);
+}
+
+static int __devexit dw_mci_pltfm_remove(struct platform_device *pdev)
 {
 	struct dw_mci *host = platform_get_drvdata(pdev);
 
 	platform_set_drvdata(pdev, NULL);
 	dw_mci_remove(host);
-	iounmap(host->regs);
-	kfree(host);
 	return 0;
 }
+EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
 
 #ifdef CONFIG_PM_SLEEP
 /*
@@ -105,12 +109,20 @@ static int dw_mci_pltfm_resume(struct device *dev)
 #define dw_mci_pltfm_resume	NULL
 #endif /* CONFIG_PM_SLEEP */
 
-static SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
+SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
+EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
+
+static const struct of_device_id dw_mci_pltfm_match[] = {
+	{ .compatible = "snps,dw-mshc", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
 
 static struct platform_driver dw_mci_pltfm_driver = {
 	.remove		= __exit_p(dw_mci_pltfm_remove),
 	.driver		= {
 		.name		= "dw_mmc",
+		.of_match_table	= of_match_ptr(dw_mci_pltfm_match),
 		.pm		= &dw_mci_pltfm_pmops,
 	},
 };

drivers/mmc/host/dw_mmc-pltfm.h

+/*
+ * Synopsys DesignWare Multimedia Card Interface Platform driver
+ *
+ * Copyright (C) 2012, Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _DW_MMC_PLTFM_H_
+#define _DW_MMC_PLTFM_H_
+
+extern int dw_mci_pltfm_register(struct platform_device *pdev,
+				struct dw_mci_drv_data *drv_data);
+extern int __devexit dw_mci_pltfm_remove(struct platform_device *pdev);
+extern const struct dev_pm_ops dw_mci_pltfm_pmops;
+
+#endif /* _DW_MMC_PLTFM_H_ */

drivers/mmc/host/dw_mmc.c

@@ -33,6 +33,7 @@
 #include <linux/bitops.h>
 #include <linux/regulator/consumer.h>
 #include <linux/workqueue.h>
+#include <linux/of.h>
 
 #include "dw_mmc.h"
 
@@ -230,6 +231,7 @@ static void dw_mci_set_timeout(struct dw_mci *host)
 static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct mmc_data	*data;
+	struct dw_mci_slot *slot = mmc_priv(mmc);
 	u32 cmdr;
 	cmd->error = -EINPROGRESS;
 
@@ -259,6 +261,9 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
 			cmdr |= SDMMC_CMD_DAT_WR;
 	}
 
+	if (slot->host->drv_data->prepare_command)
+		slot->host->drv_data->prepare_command(slot->host, &cmdr);
+
 	return cmdr;
 }
 
@@ -266,7 +271,7 @@ static void dw_mci_start_command(struct dw_mci *host,
 				 struct mmc_command *cmd, u32 cmd_flags)
 {
 	host->cmd = cmd;
-	dev_vdbg(&host->dev,
+	dev_vdbg(host->dev,
 		 "start command: ARGR=0x%08x CMDR=0x%08x\n",
 		 cmd->arg, cmd_flags);
 
@@ -308,7 +313,7 @@ static void dw_mci_dma_cleanup(struct dw_mci *host)
 
 	if (data)
 		if (!data->host_cookie)
-			dma_unmap_sg(&host->dev,
+			dma_unmap_sg(host->dev,
 				     data->sg,
 				     data->sg_len,
 				     dw_mci_get_dma_dir(data));
@@ -334,7 +339,7 @@ static void dw_mci_idmac_complete_dma(struct dw_mci *host)
 {
 	struct mmc_data *data = host->data;
 
-	dev_vdbg(&host->dev, "DMA complete\n");
+	dev_vdbg(host->dev, "DMA complete\n");
 
 	host->dma_ops->cleanup(host);
 
@@ -405,23 +410,11 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)
 static int dw_mci_idmac_init(struct dw_mci *host)
 {
 	struct idmac_desc *p;
-	int i, dma_support;
+	int i;
 
 	/* Number of descriptors in the ring buffer */
 	host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc);
 
-	/* Check if Hardware Configuration Register has support for DMA */
-	dma_support = (mci_readl(host, HCON) >> 16) & 0x3;
-
-	if (!dma_support || dma_support > 2) {
-		dev_err(&host->dev,
-			"Host Controller does not support IDMA Tx.\n");
-		host->dma_ops = NULL;
-		return -ENODEV;
-	}
-
-	dev_info(&host->dev, "Using internal DMA controller.\n");
-
 	/* Forward link the descriptor list */
 	for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++)
 		p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1));
@@ -476,7 +469,7 @@ static int dw_mci_pre_dma_transfer(struct dw_mci *host,
 			return -EINVAL;
 	}
 
-	sg_len = dma_map_sg(&host->dev,
+	sg_len = dma_map_sg(host->dev,
 			    data->sg,
 			    data->sg_len,
 			    dw_mci_get_dma_dir(data));
@@ -519,7 +512,7 @@ static void dw_mci_post_req(struct mmc_host *mmc,
 		return;
 
 	if (data->host_cookie)
-		dma_unmap_sg(&slot->host->dev,
+		dma_unmap_sg(slot->host->dev,
 			     data->sg,
 			     data->sg_len,
 			     dw_mci_get_dma_dir(data));
@@ -545,7 +538,7 @@ static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data)
 
 	host->using_dma = 1;
 
-	dev_vdbg(&host->dev,
+	dev_vdbg(host->dev,
 		 "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n",
 		 (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma,
 		 sg_len);
@@ -814,6 +807,9 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		slot->clock = ios->clock;
 	}
 
+	if (slot->host->drv_data->set_ios)
+		slot->host->drv_data->set_ios(slot->host, ios);
+
 	switch (ios->power_mode) {
 	case MMC_POWER_UP:
 		set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags);
@@ -830,7 +826,9 @@ static int dw_mci_get_ro(struct mmc_host *mmc)
 	struct dw_mci_board *brd = slot->host->pdata;
 
 	/* Use platform get_ro function, else try on board write protect */
-	if (brd->get_ro)
+	if (brd->quirks & DW_MCI_QUIRK_NO_WRITE_PROTECT)
+		read_only = 0;
+	else if (brd->get_ro)
 		read_only = brd->get_ro(slot->id);
 	else
 		read_only =
@@ -939,12 +937,12 @@ static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq)
 		slot = list_entry(host->queue.next,
 				  struct dw_mci_slot, queue_node);
 		list_del(&slot->queue_node);
-		dev_vdbg(&host->dev, "list not empty: %s is next\n",
+		dev_vdbg(host->dev, "list not empty: %s is next\n",
 			 mmc_hostname(slot->mmc));
 		host->state = STATE_SENDING_CMD;
 		dw_mci_start_request(host, slot);
 	} else {
-		dev_vdbg(&host->dev, "list empty\n");
+		dev_vdbg(host->dev, "list empty\n");
 		host->state = STATE_IDLE;
 	}
 
@@ -1083,7 +1081,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
 					data->bytes_xfered = 0;
 					data->error = -ETIMEDOUT;
 				} else {
-					dev_err(&host->dev,
+					dev_err(host->dev,
 						"data FIFO error "
 						"(status=%08x)\n",
 						status);
@@ -1767,12 +1765,60 @@ static void dw_mci_work_routine_card(struct work_struct *work)
 	}
 }
 
-static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
+#ifdef CONFIG_OF
+/* given a slot id, find out the device node representing that slot */
+static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot)
+{
+	struct device_node *np;
+	const __be32 *addr;
+	int len;
+
+	if (!dev || !dev->of_node)
+		return NULL;
+
+	for_each_child_of_node(dev->of_node, np) {
+		addr = of_get_property(np, "reg", &len);
+		if (!addr || (len < sizeof(int)))
+			continue;
+		if (be32_to_cpup(addr) == slot)
+			return np;
+	}
+	return NULL;
+}
+
+/* find out bus-width for a given slot */
+static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot)
+{
+	struct device_node *np = dw_mci_of_find_slot_node(dev, slot);
+	u32 bus_wd = 1;
+
+	if (!np)
+		return 1;
+
+	if (of_property_read_u32(np, "bus-width", &bus_wd))
+		dev_err(dev, "bus-width property not found, assuming width"
+			       " as 1\n");
+	return bus_wd;
+}
+#else /* CONFIG_OF */
+static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot)
+{
+	return 1;
+}
+static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot)
+{
+	return NULL;
+}
+#endif /* CONFIG_OF */
+
+static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 {
 	struct mmc_host *mmc;
 	struct dw_mci_slot *slot;
+	int ctrl_id, ret;
+	u8 bus_width;
 
-	mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), &host->dev);
+	mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev);
 	if (!mmc)
 		return -ENOMEM;
 
@@ -1780,6 +1826,7 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	slot->id = id;
 	slot->mmc = mmc;
 	slot->host = host;
+	host->slot[id] = slot;
 
 	mmc->ops = &dw_mci_ops;
 	mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510);
@@ -1800,21 +1847,44 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	if (host->pdata->caps)
 		mmc->caps = host->pdata->caps;
 
+	if (host->dev->of_node) {
+		ctrl_id = of_alias_get_id(host->dev->of_node, "mshc");
+		if (ctrl_id < 0)
+			ctrl_id = 0;
+	} else {
+		ctrl_id = to_platform_device(host->dev)->id;
+	}
+	if (host->drv_data && host->drv_data->caps)
+		mmc->caps |= host->drv_data->caps[ctrl_id];
+
 	if (host->pdata->caps2)
 		mmc->caps2 = host->pdata->caps2;
 
 	if (host->pdata->get_bus_wd)
-		if (host->pdata->get_bus_wd(slot->id) >= 4)
-			mmc->caps |= MMC_CAP_4_BIT_DATA;
+		bus_width = host->pdata->get_bus_wd(slot->id);
+	else if (host->dev->of_node)
+		bus_width = dw_mci_of_get_bus_wd(host->dev, slot->id);
+	else
+		bus_width = 1;
+
+	if (host->drv_data->setup_bus) {
+		struct device_node *slot_np;
+		slot_np = dw_mci_of_find_slot_node(host->dev, slot->id);
+		ret = host->drv_data->setup_bus(host, slot_np, bus_width);
+		if (ret)
+			goto err_setup_bus;
+	}
+
+	switch (bus_width) {
+	case 8:
+		mmc->caps |= MMC_CAP_8_BIT_DATA;
+	case 4:
+		mmc->caps |= MMC_CAP_4_BIT_DATA;
+	}
 
 	if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
 
-	if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
-		mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
-	else
-		mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE;
-
 	if (host->pdata->blk_settings) {
 		mmc->max_segs = host->pdata->blk_settings->max_segs;
 		mmc->max_blk_size = host->pdata->blk_settings->max_blk_size;
@@ -1850,7 +1920,6 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	else
 		clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
 
-	host->slot[id] = slot;
 	mmc_add_host(mmc);
 
 #if defined(CONFIG_DEBUG_FS)
@@ -1867,6 +1936,10 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	queue_work(host->card_workqueue, &host->card_work);
 
 	return 0;
+
+err_setup_bus:
+	mmc_free_host(mmc);
+	return -EINVAL;
 }
 
 static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
@@ -1884,10 +1957,10 @@ static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
 static void dw_mci_init_dma(struct dw_mci *host)
 {
 	/* Alloc memory for sg translation */
-	host->sg_cpu = dma_alloc_coherent(&host->dev, PAGE_SIZE,
+	host->sg_cpu = dma_alloc_coherent(host->dev, PAGE_SIZE,
 					  &host->sg_dma, GFP_KERNEL);
 	if (!host->sg_cpu) {
-		dev_err(&host->dev, "%s: could not alloc DMA memory\n",
+		dev_err(host->dev, "%s: could not alloc DMA memory\n",
 			__func__);
 		goto no_dma;
 	}
@@ -1895,6 +1968,7 @@ static void dw_mci_init_dma(struct dw_mci *host)
 	/* Determine which DMA interface to use */
 #ifdef CONFIG_MMC_DW_IDMAC
 	host->dma_ops = &dw_mci_idmac_ops;
+	dev_info(&host->dev, "Using internal DMA controller.\n");
 #endif
 
 	if (!host->dma_ops)
@@ -1903,12 +1977,12 @@ static void dw_mci_init_dma(struct dw_mci *host)
 	if (host->dma_ops->init && host->dma_ops->start &&
 	    host->dma_ops->stop && host->dma_ops->cleanup) {
 		if (host->dma_ops->init(host)) {
-			dev_err(&host->dev, "%s: Unable to initialize "
+			dev_err(host->dev, "%s: Unable to initialize "
 				"DMA Controller.\n", __func__);
 			goto no_dma;
 		}
 	} else {
-		dev_err(&host->dev, "DMA initialization not found.\n");
+		dev_err(host->dev, "DMA initialization not found.\n");
 		goto no_dma;
 	}
 
@@ -1916,7 +1990,7 @@ static void dw_mci_init_dma(struct dw_mci *host)
 	return;
 
 no_dma:
-	dev_info(&host->dev, "Using PIO mode.\n");
+	dev_info(host->dev, "Using PIO mode.\n");
 	host->use_dma = 0;
 	return;
 }
@@ -1942,30 +2016,133 @@ static bool mci_wait_reset(struct device *dev, struct dw_mci *host)
 	return false;
 }
 
+#ifdef CONFIG_OF
+static struct dw_mci_of_quirks {
+	char *quirk;
+	int id;
+} of_quirks[] = {
+	{
+		.quirk	= "supports-highspeed",
+		.id	= DW_MCI_QUIRK_HIGHSPEED,
+	}, {
+		.quirk	= "broken-cd",
+		.id	= DW_MCI_QUIRK_BROKEN_CARD_DETECTION,
+	},
+};
+
+static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
+{
+	struct dw_mci_board *pdata;
+	struct device *dev = host->dev;
+	struct device_node *np = dev->of_node;
+	int idx, ret;
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata) {
+		dev_err(dev, "could not allocate memory for pdata\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	/* find out number of slots supported */
+	if (of_property_read_u32(dev->of_node, "num-slots",
+				&pdata->num_slots)) {
+		dev_info(dev, "num-slots property not found, "
+				"assuming 1 slot is available\n");
+		pdata->num_slots = 1;
+	}
+
+	/* get quirks */
+	for (idx = 0; idx < ARRAY_SIZE(of_quirks); idx++)
+		if (of_get_property(np, of_quirks[idx].quirk, NULL))
+			pdata->quirks |= of_quirks[idx].id;
+
+	if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth))
+		dev_info(dev, "fifo-depth property not found, using "
+				"value of FIFOTH register as default\n");
+
+	of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms);
+
+	if (host->drv_data->parse_dt) {
+		ret = host->drv_data->parse_dt(host);
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
+	return pdata;
+}
+
+#else /* CONFIG_OF */
+static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
+{
+	return ERR_PTR(-EINVAL);
+}
+#endif /* CONFIG_OF */
+
 int dw_mci_probe(struct dw_mci *host)
 {
 	int width, i, ret = 0;
 	u32 fifo_size;
+	int init_slots = 0;
 
-	if (!host->pdata || !host->pdata->init) {
-		dev_err(&host->dev,
-			"Platform data must supply init function\n");
-		return -ENODEV;
+	if (!host->pdata) {
+		host->pdata = dw_mci_parse_dt(host);
+		if (IS_ERR(host->pdata)) {
+			dev_err(host->dev, "platform data not available\n");
+			return -EINVAL;
+		}
 	}
 
 	if (!host->pdata->select_slot && host->pdata->num_slots > 1) {
-		dev_err(&host->dev,
+		dev_err(host->dev,
 			"Platform data must supply select_slot function\n");
 		return -ENODEV;
 	}
 
-	if (!host->pdata->bus_hz) {
-		dev_err(&host->dev,
+	host->biu_clk = clk_get(host->dev, "biu");
+	if (IS_ERR(host->biu_clk)) {
+		dev_dbg(host->dev, "biu clock not available\n");
+	} else {
+		ret = clk_prepare_enable(host->biu_clk);
+		if (ret) {
+			dev_err(host->dev, "failed to enable biu clock\n");
+			clk_put(host->biu_clk);
+			return ret;
+		}
+	}
+
+	host->ciu_clk = clk_get(host->dev, "ciu");
+	if (IS_ERR(host->ciu_clk)) {
+		dev_dbg(host->dev, "ciu clock not available\n");
+	} else {
+		ret = clk_prepare_enable(host->ciu_clk);
+		if (ret) {
+			dev_err(host->dev, "failed to enable ciu clock\n");
+			clk_put(host->ciu_clk);
+			goto err_clk_biu;
+		}
+	}
+
+	if (IS_ERR(host->ciu_clk))
+		host->bus_hz = host->pdata->bus_hz;
+	else
+		host->bus_hz = clk_get_rate(host->ciu_clk);
+
+	if (host->drv_data->setup_clock) {
+		ret = host->drv_data->setup_clock(host);
+		if (ret) {
+			dev_err(host->dev,
+				"implementation specific clock setup failed\n");
+			goto err_clk_ciu;
+		}
+	}
+
+	if (!host->bus_hz) {
+		dev_err(host->dev,
 			"Platform data must supply bus speed\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto err_clk_ciu;
 	}
 
-	host->bus_hz = host->pdata->bus_hz;
 	host->quirks = host->pdata->quirks;
 
 	spin_lock_init(&host->lock);
@@ -1998,7 +2175,7 @@ int dw_mci_probe(struct dw_mci *host)
 	}
 
 	/* Reset all blocks */
-	if (!mci_wait_reset(&host->dev, host))
+	if (!mci_wait_reset(host->dev, host))
 		return -ENODEV;
 
 	host->dma_ops = host->pdata->dma_ops;
@@ -2054,10 +2231,18 @@ int dw_mci_probe(struct dw_mci *host)
 	/* We need at least one slot to succeed */
 	for (i = 0; i < host->num_slots; i++) {
 		ret = dw_mci_init_slot(host, i);
-		if (ret) {
-			ret = -ENODEV;
-			goto err_init_slot;
-		}
+		if (ret)
+			dev_dbg(host->dev, "slot %d init failed\n", i);
+		else
+			init_slots++;
+	}
+
+	if (init_slots) {
+		dev_info(host->dev, "%d slots initialized\n", init_slots);
+	} else {
+		dev_dbg(host->dev, "attempted to initialize %d slots, "
+					"but failed on all\n", host->num_slots);
+		goto err_init_slot;
 	}
 
 	/*
@@ -2065,7 +2250,7 @@ int dw_mci_probe(struct dw_mci *host)
 	 * Need to check the version-id and set data-offset for DATA register.
 	 */
 	host->verid = SDMMC_GET_VERID(mci_readl(host, VERID));
-	dev_info(&host->dev, "Version ID is %04x\n", host->verid);
+	dev_info(host->dev, "Version ID is %04x\n", host->verid);
 
 	if (host->verid < DW_MMC_240A)
 		host->data_offset = DATA_OFFSET;
@@ -2082,22 +2267,16 @@ int dw_mci_probe(struct dw_mci *host)
 		   DW_MCI_ERROR_FLAGS | SDMMC_INT_CD);
 	mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */
 
-	dev_info(&host->dev, "DW MMC controller at irq %d, "
+	dev_info(host->dev, "DW MMC controller at irq %d, "
 		 "%d bit host data width, "
 		 "%u deep fifo\n",
 		 host->irq, width, fifo_size);
 	if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO)
-		dev_info(&host->dev, "Internal DMAC interrupt fix enabled.\n");
+		dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n");
 
 	return 0;
 
 err_init_slot:
-	/* De-init any initialized slots */
-	while (i > 0) {
-		if (host->slot[i])
-			dw_mci_cleanup_slot(host->slot[i], i);
-		i--;
-	}
 	free_irq(host->irq, host);
 
 err_workqueue:
@@ -2106,13 +2285,24 @@ int dw_mci_probe(struct dw_mci *host)
 err_dmaunmap:
 	if (host->use_dma && host->dma_ops->exit)
 		host->dma_ops->exit(host);
-	dma_free_coherent(&host->dev, PAGE_SIZE,
+	dma_free_coherent(host->dev, PAGE_SIZE,
 			  host->sg_cpu, host->sg_dma);
 
 	if (host->vmmc) {
 		regulator_disable(host->vmmc);
 		regulator_put(host->vmmc);
 	}
+
+err_clk_ciu:
+	if (!IS_ERR(host->ciu_clk)) {
+		clk_disable_unprepare(host->ciu_clk);
+		clk_put(host->ciu_clk);
+	}
+err_clk_biu:
+	if (!IS_ERR(host->biu_clk)) {
+		clk_disable_unprepare(host->biu_clk);
+		clk_put(host->biu_clk);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(dw_mci_probe);
@@ -2125,7 +2315,7 @@ void dw_mci_remove(struct dw_mci *host)
 	mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
 
 	for (i = 0; i < host->num_slots; i++) {
-		dev_dbg(&host->dev, "remove slot %d\n", i);
+		dev_dbg(host->dev, "remove slot %d\n", i);
 		if (host->slot[i])
 			dw_mci_cleanup_slot(host->slot[i], i);
 	}
@@ -2136,7 +2326,7 @@ void dw_mci_remove(struct dw_mci *host)
 
 	free_irq(host->irq, host);
 	destroy_workqueue(host->card_workqueue);
-	dma_free_coherent(&host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
+	dma_free_coherent(host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
 
 	if (host->use_dma && host->dma_ops->exit)
 		host->dma_ops->exit(host);
@@ -2146,6 +2336,12 @@ void dw_mci_remove(struct dw_mci *host)
 		regulator_put(host->vmmc);
 	}
 
+	if (!IS_ERR(host->ciu_clk))
+		clk_disable_unprepare(host->ciu_clk);
+	if (!IS_ERR(host->biu_clk))
+		clk_disable_unprepare(host->biu_clk);
+	clk_put(host->ciu_clk);
+	clk_put(host->biu_clk);
 }
 EXPORT_SYMBOL(dw_mci_remove);
 
@@ -2188,7 +2384,7 @@ int dw_mci_resume(struct dw_mci *host)
 	if (host->vmmc)
 		regulator_enable(host->vmmc);
 
-	if (!mci_wait_reset(&host->dev, host)) {
+	if (!mci_wait_reset(host->dev, host)) {
 		ret = -ENODEV;
 		return ret;
 	}

drivers/mmc/host/dw_mmc.h

@@ -182,4 +182,28 @@ extern int dw_mci_suspend(struct dw_mci *host);
 extern int dw_mci_resume(struct dw_mci *host);
 #endif
 
+/**
+ * dw_mci driver data - dw-mshc implementation specific driver data.
+ * @caps: mmc subsystem specified capabilities of the controller(s).
+ * @init: early implementation specific initialization.
+ * @setup_clock: implementation specific clock configuration.
+ * @prepare_command: handle CMD register extensions.
+ * @set_ios: handle bus specific extensions.
+ * @parse_dt: parse implementation specific device tree properties.
+ * @setup_bus: initialize io-interface
+ *
+ * Provide controller implementation specific extensions. The usage of this
+ * data structure is fully optional and usage of each member in this structure
+ * is optional as well.
+ */
+struct dw_mci_drv_data {
+	unsigned long	*caps;
+	int		(*init)(struct dw_mci *host);
+	int		(*setup_clock)(struct dw_mci *host);
+	void		(*prepare_command)(struct dw_mci *host, u32 *cmdr);
+	void		(*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
+	int		(*parse_dt)(struct dw_mci *host);
+	int		(*setup_bus)(struct dw_mci *host,
+				struct device_node *slot_np, u8 bus_width);
+};
 #endif /* _DW_MMC_H_ */

drivers/mmc/host/mmc_spi.c

@@ -1532,20 +1532,7 @@ static struct spi_driver mmc_spi_driver = {
 	.remove =	__devexit_p(mmc_spi_remove),
 };
 
-
-static int __init mmc_spi_init(void)
-{
-	return spi_register_driver(&mmc_spi_driver);
-}
-module_init(mmc_spi_init);
-
-
-static void __exit mmc_spi_exit(void)
-{
-	spi_unregister_driver(&mmc_spi_driver);
-}
-module_exit(mmc_spi_exit);
-
+module_spi_driver(mmc_spi_driver);
 
 MODULE_AUTHOR("Mike Lavender, David Brownell, "
 		"Hans-Peter Nilsson, Jan Nikitenko");

drivers/mmc/host/mmci.c

@@ -1309,14 +1309,10 @@ static int __devinit mmci_probe(struct amba_device *dev,
 		goto host_free;
 	}
 
-	ret = clk_prepare(host->clk);
+	ret = clk_prepare_enable(host->clk);
 	if (ret)
 		goto clk_free;
 
-	ret = clk_enable(host->clk);
-	if (ret)
-		goto clk_unprep;
-
 	host->plat = plat;
 	host->variant = variant;
 	host->mclk = clk_get_rate(host->clk);
@@ -1515,9 +1511,7 @@ static int __devinit mmci_probe(struct amba_device *dev,
  err_gpio_cd:
 	iounmap(host->base);
  clk_disable:
-	clk_disable(host->clk);
- clk_unprep:
-	clk_unprepare(host->clk);
+	clk_disable_unprepare(host->clk);
  clk_free:
 	clk_put(host->clk);
  host_free:
@@ -1564,8 +1558,7 @@ static int __devexit mmci_remove(struct amba_device *dev)
 			gpio_free(host->gpio_cd);
 
 		iounmap(host->base);
-		clk_disable(host->clk);
-		clk_unprepare(host->clk);
+		clk_disable_unprepare(host->clk);
 		clk_put(host->clk);
 
 		if (host->vcc)

drivers/mmc/host/mxcmmc.c

@@ -44,6 +44,7 @@
 #include <mach/hardware.h>
 
 #define DRIVER_NAME "mxc-mmc"
+#define MXCMCI_TIMEOUT_MS 10000
 
 #define MMC_REG_STR_STP_CLK		0x00
 #define MMC_REG_STATUS			0x04
@@ -150,6 +151,8 @@ struct mxcmci_host {
 	int			dmareq;
 	struct dma_slave_config dma_slave_config;
 	struct imx_dma_data	dma_data;
+
+	struct timer_list	watchdog;
 };
 
 static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios);
@@ -271,9 +274,32 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
 	dmaengine_submit(host->desc);
 	dma_async_issue_pending(host->dma);
 
+	mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS));
+
 	return 0;
 }
 
+static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat);
+static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat);
+
+static void mxcmci_dma_callback(void *data)
+{
+	struct mxcmci_host *host = data;
+	u32 stat;
+
+	del_timer(&host->watchdog);
+
+	stat = readl(host->base + MMC_REG_STATUS);
+	writel(stat & ~STATUS_DATA_TRANS_DONE, host->base + MMC_REG_STATUS);
+
+	dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat);
+
+	if (stat & STATUS_READ_OP_DONE)
+		writel(STATUS_READ_OP_DONE, host->base + MMC_REG_STATUS);
+
+	mxcmci_data_done(host, stat);
+}
+
 static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd,
 		unsigned int cmdat)
 {
@@ -305,8 +331,14 @@ static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd,
 
 	int_cntr = INT_END_CMD_RES_EN;
 
-	if (mxcmci_use_dma(host))
-		int_cntr |= INT_READ_OP_EN | INT_WRITE_OP_DONE_EN;
+	if (mxcmci_use_dma(host)) {
+		if (host->dma_dir == DMA_FROM_DEVICE) {
+			host->desc->callback = mxcmci_dma_callback;
+			host->desc->callback_param = host;
+		} else {
+			int_cntr |= INT_WRITE_OP_DONE_EN;
+		}
+	}
 
 	spin_lock_irqsave(&host->lock, flags);
 	if (host->use_sdio)
@@ -345,11 +377,9 @@ static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat)
 	struct mmc_data *data = host->data;
 	int data_error;
 
-	if (mxcmci_use_dma(host)) {
-		dmaengine_terminate_all(host->dma);
+	if (mxcmci_use_dma(host))
 		dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len,
 				host->dma_dir);
-	}
 
 	if (stat & STATUS_ERR_MASK) {
 		dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n",
@@ -624,8 +654,10 @@ static irqreturn_t mxcmci_irq(int irq, void *devid)
 		mxcmci_cmd_done(host, stat);
 
 	if (mxcmci_use_dma(host) &&
-		  (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE)))
+		  (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE))) {
+		del_timer(&host->watchdog);
 		mxcmci_data_done(host, stat);
+	}
 
 	if (host->default_irq_mask &&
 		  (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL)))
@@ -836,6 +868,34 @@ static bool filter(struct dma_chan *chan, void *param)
 	return true;
 }
 
+static void mxcmci_watchdog(unsigned long data)
+{
+	struct mmc_host *mmc = (struct mmc_host *)data;
+	struct mxcmci_host *host = mmc_priv(mmc);
+	struct mmc_request *req = host->req;
+	unsigned int stat = readl(host->base + MMC_REG_STATUS);
+
+	if (host->dma_dir == DMA_FROM_DEVICE) {
+		dmaengine_terminate_all(host->dma);
+		dev_err(mmc_dev(host->mmc),
+			"%s: read time out (status = 0x%08x)\n",
+			__func__, stat);
+	} else {
+		dev_err(mmc_dev(host->mmc),
+			"%s: write time out (status = 0x%08x)\n",
+			__func__, stat);
+		mxcmci_softreset(host);
+	}
+
+	/* Mark transfer as erroneus and inform the upper layers */
+
+	host->data->error = -ETIMEDOUT;
+	host->req = NULL;
+	host->cmd = NULL;
+	host->data = NULL;
+	mmc_request_done(host->mmc, req);
+}
+
 static const struct mmc_host_ops mxcmci_ops = {
 	.request		= mxcmci_request,
 	.set_ios		= mxcmci_set_ios,
@@ -968,6 +1028,10 @@ static int mxcmci_probe(struct platform_device *pdev)
 
 	mmc_add_host(mmc);
 
+	init_timer(&host->watchdog);
+	host->watchdog.function = &mxcmci_watchdog;
+	host->watchdog.data = (unsigned long)mmc;
+
 	return 0;
 
 out_free_irq:

drivers/mmc/host/omap.c

@@ -27,16 +27,10 @@
 #include <linux/mmc/card.h>
 #include <linux/clk.h>
 #include <linux/scatterlist.h>
-#include <linux/i2c/tps65010.h>
 #include <linux/slab.h>
 
-#include <asm/io.h>
-#include <asm/irq.h>
-
 #include <plat/mmc.h>
-#include <asm/gpio.h>
 #include <plat/dma.h>
-#include <plat/fpga.h>
 
 #define	OMAP_MMC_REG_CMD	0x00
 #define	OMAP_MMC_REG_ARGL	0x01
@@ -105,7 +99,6 @@ struct mmc_omap_slot {
 	u16			saved_con;
 	u16			bus_mode;
 	unsigned int		fclk_freq;
-	unsigned		powered:1;
 
 	struct tasklet_struct	cover_tasklet;
 	struct timer_list       cover_timer;
@@ -137,7 +130,6 @@ struct mmc_omap_host {
 	unsigned int		phys_base;
 	int			irq;
 	unsigned char		bus_mode;
-	unsigned char		hw_bus_mode;
 	unsigned int		reg_shift;
 
 	struct work_struct	cmd_abort_work;
@@ -695,22 +687,29 @@ mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
 	host->buffer += nwords;
 }
 
-static inline void mmc_omap_report_irq(u16 status)
+#ifdef CONFIG_MMC_DEBUG
+static void mmc_omap_report_irq(struct mmc_omap_host *host, u16 status)
 {
 	static const char *mmc_omap_status_bits[] = {
 		"EOC", "CD", "CB", "BRS", "EOFB", "DTO", "DCRC", "CTO",
 		"CCRC", "CRW", "AF", "AE", "OCRB", "CIRQ", "CERR"
 	};
-	int i, c = 0;
+	int i;
+	char res[64], *buf = res;
+
+	buf += sprintf(buf, "MMC IRQ 0x%x:", status);
 
 	for (i = 0; i < ARRAY_SIZE(mmc_omap_status_bits); i++)
-		if (status & (1 << i)) {
-			if (c)
-				printk(" ");
-			printk("%s", mmc_omap_status_bits[i]);
-			c++;
-		}
+		if (status & (1 << i))
+			buf += sprintf(buf, " %s", mmc_omap_status_bits[i]);
+	dev_vdbg(mmc_dev(host->mmc), "%s\n", res);
 }
+#else
+static void mmc_omap_report_irq(struct mmc_omap_host *host, u16 status)
+{
+}
+#endif
+
 
 static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 {
@@ -744,12 +743,10 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 			cmd = host->cmd->opcode;
 		else
 			cmd = -1;
-#ifdef CONFIG_MMC_DEBUG
 		dev_dbg(mmc_dev(host->mmc), "MMC IRQ %04x (CMD %d): ",
 			status, cmd);
-		mmc_omap_report_irq(status);
-		printk("\n");
-#endif
+		mmc_omap_report_irq(host, status);
+
 		if (host->total_bytes_left) {
 			if ((status & OMAP_MMC_STAT_A_FULL) ||
 			    (status & OMAP_MMC_STAT_END_OF_DATA))

drivers/mmc/host/omap_hsmmc.c

@@ -35,7 +35,6 @@
 #include <linux/mmc/core.h>
 #include <linux/mmc/mmc.h>
 #include <linux/io.h>
-#include <linux/semaphore.h>
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
@@ -44,7 +43,6 @@
 #include <plat/cpu.h>
 
 /* OMAP HSMMC Host Controller Registers */
-#define OMAP_HSMMC_SYSCONFIG	0x0010
 #define OMAP_HSMMC_SYSSTATUS	0x0014
 #define OMAP_HSMMC_CON		0x002C
 #define OMAP_HSMMC_BLK		0x0104
@@ -161,8 +159,6 @@ struct omap_hsmmc_host {
 	unsigned int		dma_sg_idx;
 	unsigned char		bus_mode;
 	unsigned char		power_mode;
-	u32			*buffer;
-	u32			bytesleft;
 	int			suspended;
 	int			irq;
 	int			use_dma, dma_ch;
@@ -171,7 +167,6 @@ struct omap_hsmmc_host {
 	int			slot_id;
 	int			response_busy;
 	int			context_loss;
-	int			vdd;
 	int			protect_card;
 	int			reqs_blocked;
 	int			use_reg;
@@ -300,12 +295,12 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
 	struct regulator *reg;
 	int ocr_value = 0;
 
-	mmc_slot(host).set_power = omap_hsmmc_set_power;
-
 	reg = regulator_get(host->dev, "vmmc");
 	if (IS_ERR(reg)) {
 		dev_dbg(host->dev, "vmmc regulator missing\n");
+		return PTR_ERR(reg);
 	} else {
+		mmc_slot(host).set_power = omap_hsmmc_set_power;
 		host->vcc = reg;
 		ocr_value = mmc_regulator_get_ocrmask(reg);
 		if (!mmc_slot(host).ocr_mask) {
@@ -495,7 +490,7 @@ static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host)
 	unsigned long regval;
 	unsigned long timeout;
 
-	dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock);
+	dev_vdbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock);
 
 	omap_hsmmc_stop_clock(host);
 
@@ -579,21 +574,8 @@ static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
 	if (host->context_loss == context_loss)
 		return 1;
 
-	/* Wait for hardware reset */
-	timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
-	while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
-		&& time_before(jiffies, timeout))
-		;
-
-	/* Do software reset */
-	OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET);
-	timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
-	while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
-		&& time_before(jiffies, timeout))
-		;
-
-	OMAP_HSMMC_WRITE(host->base, SYSCONFIG,
-			OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE);
+	if (!OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE)
+		return 1;
 
 	if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
 		if (host->power_mode != MMC_POWER_OFF &&
@@ -745,7 +727,7 @@ omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
 {
 	int cmdreg = 0, resptype = 0, cmdtype = 0;
 
-	dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n",
+	dev_vdbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n",
 		mmc_hostname(host->mmc), cmd->opcode, cmd->arg);
 	host->cmd = cmd;
 
@@ -934,7 +916,7 @@ static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status)
 			buf += len;
 		}
 
-	dev_dbg(mmc_dev(host->mmc), "%s\n", res);
+	dev_vdbg(mmc_dev(host->mmc), "%s\n", res);
 }
 #else
 static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host,
@@ -981,72 +963,40 @@ static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host,
 			__func__);
 }
 
+static void hsmmc_command_incomplete(struct omap_hsmmc_host *host, int err)
+{
+	omap_hsmmc_reset_controller_fsm(host, SRC);
+	host->cmd->error = err;
+
+	if (host->data) {
+		omap_hsmmc_reset_controller_fsm(host, SRD);
+		omap_hsmmc_dma_cleanup(host, err);
+	}
+
+}
+
 static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status)
 {
 	struct mmc_data *data;
 	int end_cmd = 0, end_trans = 0;
 
-	if (!host->req_in_progress) {
-		do {
-			OMAP_HSMMC_WRITE(host->base, STAT, status);
-			/* Flush posted write */
-			status = OMAP_HSMMC_READ(host->base, STAT);
-		} while (status & INT_EN_MASK);
-		return;
-	}
-
 	data = host->data;
-	dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
+	dev_vdbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
 
 	if (status & ERR) {
 		omap_hsmmc_dbg_report_irq(host, status);
-		if ((status & CMD_TIMEOUT) ||
-			(status & CMD_CRC)) {
-			if (host->cmd) {
-				if (status & CMD_TIMEOUT) {
-					omap_hsmmc_reset_controller_fsm(host,
-									SRC);
-					host->cmd->error = -ETIMEDOUT;
-				} else {
-					host->cmd->error = -EILSEQ;
-				}
-				end_cmd = 1;
-			}
-			if (host->data || host->response_busy) {
-				if (host->data)
-					omap_hsmmc_dma_cleanup(host,
-								-ETIMEDOUT);
-				host->response_busy = 0;
-				omap_hsmmc_reset_controller_fsm(host, SRD);
-			}
-		}
-		if ((status & DATA_TIMEOUT) ||
-			(status & DATA_CRC)) {
-			if (host->data || host->response_busy) {
-				int err = (status & DATA_TIMEOUT) ?
-						-ETIMEDOUT : -EILSEQ;
-
-				if (host->data)
-					omap_hsmmc_dma_cleanup(host, err);
-				else
-					host->mrq->cmd->error = err;
-				host->response_busy = 0;
-				omap_hsmmc_reset_controller_fsm(host, SRD);
-				end_trans = 1;
-			}
-		}
-		if (status & CARD_ERR) {
-			dev_dbg(mmc_dev(host->mmc),
-				"Ignoring card err CMD%d\n", host->cmd->opcode);
-			if (host->cmd)
-				end_cmd = 1;
-			if (host->data)
-				end_trans = 1;
+		if (status & (CMD_TIMEOUT | DATA_TIMEOUT))
+			hsmmc_command_incomplete(host, -ETIMEDOUT);
+		else if (status & (CMD_CRC | DATA_CRC))
+			hsmmc_command_incomplete(host, -EILSEQ);
+
+		end_cmd = 1;
+		if (host->data || host->response_busy) {
+			end_trans = 1;
+			host->response_busy = 0;
 		}
 	}
 
-	OMAP_HSMMC_WRITE(host->base, STAT, status);
-
 	if (end_cmd || ((status & CC) && host->cmd))
 		omap_hsmmc_cmd_done(host, host->cmd);
 	if ((end_trans || (status & TC)) && host->mrq)
@@ -1062,11 +1012,13 @@ static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id)
 	int status;
 
 	status = OMAP_HSMMC_READ(host->base, STAT);
-	do {
+	while (status & INT_EN_MASK && host->req_in_progress) {
 		omap_hsmmc_do_irq(host, status);
+
 		/* Flush posted write */
+		OMAP_HSMMC_WRITE(host->base, STAT, status);
 		status = OMAP_HSMMC_READ(host->base, STAT);
-	} while (status & INT_EN_MASK);
+	}
 
 	return IRQ_HANDLED;
 }
@@ -1501,12 +1453,10 @@ static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		case MMC_POWER_OFF:
 			mmc_slot(host).set_power(host->dev, host->slot_id,
 						 0, 0);
-			host->vdd = 0;
 			break;
 		case MMC_POWER_UP:
 			mmc_slot(host).set_power(host->dev, host->slot_id,
 						 1, ios->vdd);
-			host->vdd = ios->vdd;
 			break;
 		case MMC_POWER_ON:
 			do_send_init_stream = 1;
@@ -1598,10 +1548,6 @@ static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
 	value = OMAP_HSMMC_READ(host->base, CAPA);
 	OMAP_HSMMC_WRITE(host->base, CAPA, value | capa);
 
-	/* Set the controller to AUTO IDLE mode */
-	value = OMAP_HSMMC_READ(host->base, SYSCONFIG);
-	OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE);
-
 	/* Set SD bus power bit */
 	set_sd_bus_power(host);
 }
@@ -1659,8 +1605,6 @@ static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
 
 	pm_runtime_get_sync(host->dev);
 
-	seq_printf(s, "SYSCONFIG:\t0x%08x\n",
-			OMAP_HSMMC_READ(host->base, SYSCONFIG));
 	seq_printf(s, "CON:\t\t0x%08x\n",
 			OMAP_HSMMC_READ(host->base, CON));
 	seq_printf(s, "HCTL:\t\t0x%08x\n",
@@ -2105,8 +2049,7 @@ static int omap_hsmmc_suspend(struct device *dev)
 	if (ret) {
 		host->suspended = 0;
 		if (host->pdata->resume) {
-			ret = host->pdata->resume(dev, host->slot_id);
-			if (ret)
+			if (host->pdata->resume(dev, host->slot_id))
 				dev_dbg(dev, "Unmask interrupt failed\n");
 		}
 		goto err;

drivers/mmc/host/pxamci.c

@@ -30,6 +30,9 @@
 #include <linux/regulator/consumer.h>
 #include <linux/gpio.h>
 #include <linux/gfp.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_device.h>
 
 #include <asm/sizes.h>
 
@@ -573,6 +576,50 @@ static irqreturn_t pxamci_detect_irq(int irq, void *devid)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id pxa_mmc_dt_ids[] = {
+        { .compatible = "marvell,pxa-mmc" },
+        { }
+};
+
+MODULE_DEVICE_TABLE(of, pxa_mmc_dt_ids);
+
+static int __devinit pxamci_of_init(struct platform_device *pdev)
+{
+        struct device_node *np = pdev->dev.of_node;
+        struct pxamci_platform_data *pdata;
+        u32 tmp;
+
+        if (!np)
+                return 0;
+
+        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+        if (!pdata)
+                return -ENOMEM;
+
+	pdata->gpio_card_detect =
+		of_get_named_gpio(np, "cd-gpios", 0);
+	pdata->gpio_card_ro =
+		of_get_named_gpio(np, "wp-gpios", 0);
+
+	/* pxa-mmc specific */
+	pdata->gpio_power =
+		of_get_named_gpio(np, "pxa-mmc,gpio-power", 0);
+
+	if (of_property_read_u32(np, "pxa-mmc,detect-delay-ms", &tmp) == 0)
+		pdata->detect_delay_ms = tmp;
+
+        pdev->dev.platform_data = pdata;
+
+        return 0;
+}
+#else
+static int __devinit pxamci_of_init(struct platform_device *pdev)
+{
+        return 0;
+}
+#endif
+
 static int pxamci_probe(struct platform_device *pdev)
 {
 	struct mmc_host *mmc;
@@ -580,6 +627,10 @@ static int pxamci_probe(struct platform_device *pdev)
 	struct resource *r, *dmarx, *dmatx;
 	int ret, irq, gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
 
+	ret = pxamci_of_init(pdev);
+	if (ret)
+		return ret;
+
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	irq = platform_get_irq(pdev, 0);
 	if (!r || irq < 0)
@@ -866,6 +917,7 @@ static struct platform_driver pxamci_driver = {
 	.driver		= {
 		.name	= DRIVER_NAME,
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(pxa_mmc_dt_ids),
 #ifdef CONFIG_PM
 		.pm	= &pxamci_pm_ops,
 #endif

drivers/mmc/host/sdhci-dove.c

@@ -24,6 +24,7 @@
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/mmc/host.h>
+#include <linux/of.h>
 
 #include "sdhci-pltfm.h"
 
@@ -126,11 +127,18 @@ static int __devexit sdhci_dove_remove(struct platform_device *pdev)
 	return sdhci_pltfm_unregister(pdev);
 }
 
+static const struct of_device_id sdhci_dove_of_match_table[] __devinitdata = {
+	{ .compatible = "marvell,dove-sdhci", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
+
 static struct platform_driver sdhci_dove_driver = {
 	.driver		= {
 		.name	= "sdhci-dove",
 		.owner	= THIS_MODULE,
 		.pm	= SDHCI_PLTFM_PMOPS,
+		.of_match_table = of_match_ptr(sdhci_dove_of_match_table),
 	},
 	.probe		= sdhci_dove_probe,
 	.remove		= __devexit_p(sdhci_dove_remove),

drivers/mmc/host/sdhci-of-esdhc.c

@@ -21,6 +21,32 @@
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"
 
+#define VENDOR_V_22	0x12
+static u32 esdhc_readl(struct sdhci_host *host, int reg)
+{
+	u32 ret;
+
+	ret = in_be32(host->ioaddr + reg);
+	/*
+	 * The bit of ADMA flag in eSDHC is not compatible with standard
+	 * SDHC register, so set fake flag SDHCI_CAN_DO_ADMA2 when ADMA is
+	 * supported by eSDHC.
+	 * And for many FSL eSDHC controller, the reset value of field
+	 * SDHCI_CAN_DO_ADMA1 is one, but some of them can't support ADMA,
+	 * only these vendor version is greater than 2.2/0x12 support ADMA.
+	 * For FSL eSDHC, must aligned 4-byte, so use 0xFC to read the
+	 * the verdor version number, oxFE is SDHCI_HOST_VERSION.
+	 */
+	if ((reg == SDHCI_CAPABILITIES) && (ret & SDHCI_CAN_DO_ADMA1)) {
+		u32 tmp = in_be32(host->ioaddr + SDHCI_SLOT_INT_STATUS);
+		tmp = (tmp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
+		if (tmp > VENDOR_V_22)
+			ret |= SDHCI_CAN_DO_ADMA2;
+	}
+
+	return ret;
+}
+
 static u16 esdhc_readw(struct sdhci_host *host, int reg)
 {
 	u16 ret;
@@ -144,7 +170,7 @@ static void esdhc_of_resume(struct sdhci_host *host)
 #endif
 
 static struct sdhci_ops sdhci_esdhc_ops = {
-	.read_l = sdhci_be32bs_readl,
+	.read_l = esdhc_readl,
 	.read_w = esdhc_readw,
 	.read_b = esdhc_readb,
 	.write_l = sdhci_be32bs_writel,
@@ -161,9 +187,13 @@ static struct sdhci_ops sdhci_esdhc_ops = {
 };
 
 static struct sdhci_pltfm_data sdhci_esdhc_pdata = {
-	/* card detection could be handled via GPIO */
+	/*
+	 * card detection could be handled via GPIO
+	 * eSDHC cannot support End Attribute in NOP ADMA descriptor
+	 */
 	.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
-		| SDHCI_QUIRK_NO_CARD_NO_RESET,
+		| SDHCI_QUIRK_NO_CARD_NO_RESET
+		| SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 	.ops = &sdhci_esdhc_ops,
 };
 

drivers/mmc/host/sdhci-pci.c

@@ -1476,24 +1476,7 @@ static struct pci_driver sdhci_driver = {
 	},
 };
 
-/*****************************************************************************\
- *                                                                           *
- * Driver init/exit                                                          *
- *                                                                           *
-\*****************************************************************************/
-
-static int __init sdhci_drv_init(void)
-{
-	return pci_register_driver(&sdhci_driver);
-}
-
-static void __exit sdhci_drv_exit(void)
-{
-	pci_unregister_driver(&sdhci_driver);
-}
-
-module_init(sdhci_drv_init);
-module_exit(sdhci_drv_exit);
+module_pci_driver(sdhci_driver);
 
 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
 MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");

drivers/mmc/host/sdhci-pltfm.c

@@ -75,6 +75,9 @@ void sdhci_get_of_property(struct platform_device *pdev)
 		if (sdhci_of_wp_inverted(np))
 			host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
 
+		if (of_get_property(np, "broken-cd", NULL))
+			host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+
 		if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
 			host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
 

drivers/mmc/host/sdhci-pxav2.c

@@ -197,7 +197,7 @@ static int __devinit sdhci_pxav2_probe(struct platform_device *pdev)
 		goto err_clk_get;
 	}
 	pltfm_host->clk = clk;
-	clk_enable(clk);
+	clk_prepare_enable(clk);
 
 	host->quirks = SDHCI_QUIRK_BROKEN_ADMA
 		| SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
@@ -239,7 +239,7 @@ static int __devinit sdhci_pxav2_probe(struct platform_device *pdev)
 	return 0;
 
 err_add_host:
-	clk_disable(clk);
+	clk_disable_unprepare(clk);
 	clk_put(clk);
 err_clk_get:
 	sdhci_pltfm_free(pdev);
@@ -255,7 +255,7 @@ static int __devexit sdhci_pxav2_remove(struct platform_device *pdev)
 
 	sdhci_remove_host(host, 1);
 
-	clk_disable(pltfm_host->clk);
+	clk_disable_unprepare(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
 	sdhci_pltfm_free(pdev);
 	kfree(pxa);

drivers/mmc/host/sdhci-pxav3.c

@@ -24,12 +24,14 @@
 #include <linux/gpio.h>
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
+#include <linux/mmc/slot-gpio.h>
 #include <linux/platform_data/pxa_sdhci.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_gpio.h>
 
 #include "sdhci.h"
 #include "sdhci-pltfm.h"
@@ -182,6 +184,7 @@ static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
 	struct device_node *np = dev->of_node;
 	u32 bus_width;
 	u32 clk_delay_cycles;
+	enum of_gpio_flags gpio_flags;
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -198,6 +201,10 @@ static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
 	if (clk_delay_cycles > 0)
 		pdata->clk_delay_cycles = clk_delay_cycles;
 
+	pdata->ext_cd_gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &gpio_flags);
+	if (gpio_flags != OF_GPIO_ACTIVE_LOW)
+		pdata->host_caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
+
 	return pdata;
 }
 #else
@@ -231,14 +238,14 @@ static int __devinit sdhci_pxav3_probe(struct platform_device *pdev)
 	pltfm_host = sdhci_priv(host);
 	pltfm_host->priv = pxa;
 
-	clk = clk_get(dev, "PXA-SDHCLK");
+	clk = clk_get(dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(dev, "failed to get io clock\n");
 		ret = PTR_ERR(clk);
 		goto err_clk_get;
 	}
 	pltfm_host->clk = clk;
-	clk_enable(clk);
+	clk_prepare_enable(clk);
 
 	host->quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
 		| SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
@@ -266,12 +273,25 @@ static int __devinit sdhci_pxav3_probe(struct platform_device *pdev)
 			host->quirks |= pdata->quirks;
 		if (pdata->host_caps)
 			host->mmc->caps |= pdata->host_caps;
+		if (pdata->host_caps2)
+			host->mmc->caps2 |= pdata->host_caps2;
 		if (pdata->pm_caps)
 			host->mmc->pm_caps |= pdata->pm_caps;
+
+		if (gpio_is_valid(pdata->ext_cd_gpio)) {
+			ret = mmc_gpio_request_cd(host->mmc, pdata->ext_cd_gpio);
+			if (ret) {
+				dev_err(mmc_dev(host->mmc),
+					"failed to allocate card detect gpio\n");
+				goto err_cd_req;
+			}
+		}
 	}
 
 	host->ops = &pxav3_sdhci_ops;
 
+	sdhci_get_of_property(pdev);
+
 	ret = sdhci_add_host(host);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to add host\n");
@@ -283,8 +303,10 @@ static int __devinit sdhci_pxav3_probe(struct platform_device *pdev)
 	return 0;
 
 err_add_host:
-	clk_disable(clk);
+	clk_disable_unprepare(clk);
 	clk_put(clk);
+	mmc_gpio_free_cd(host->mmc);
+err_cd_req:
 err_clk_get:
 	sdhci_pltfm_free(pdev);
 	kfree(pxa);
@@ -296,11 +318,16 @@ static int __devexit sdhci_pxav3_remove(struct platform_device *pdev)
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_pxa *pxa = pltfm_host->priv;
+	struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
 
 	sdhci_remove_host(host, 1);
 
-	clk_disable(pltfm_host->clk);
+	clk_disable_unprepare(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
+
+	if (gpio_is_valid(pdata->ext_cd_gpio))
+		mmc_gpio_free_cd(host->mmc);
+
 	sdhci_pltfm_free(pdev);
 	kfree(pxa);
 

drivers/mmc/host/sdhci-s3c.c

@@ -34,6 +34,9 @@
 
 #define MAX_BUS_CLK	(4)
 
+/* Number of gpio's used is max data bus width + command and clock lines */
+#define NUM_GPIOS(x)	(x + 2)
+
 /**
  * struct sdhci_s3c - S3C SDHCI instance
  * @host: The SDHCI host created
@@ -41,6 +44,7 @@
  * @ioarea: The resource created when we claimed the IO area.
  * @pdata: The platform data for this controller.
  * @cur_clk: The index of the current bus clock.
+ * @gpios: List of gpio numbers parsed from device tree.
  * @clk_io: The clock for the internal bus interface.
  * @clk_bus: The clocks that are available for the SD/MMC bus clock.
  */
@@ -52,6 +56,7 @@ struct sdhci_s3c {
 	unsigned int		cur_clk;
 	int			ext_cd_irq;
 	int			ext_cd_gpio;
+	int			*gpios;
 
 	struct clk		*clk_io;
 	struct clk		*clk_bus[MAX_BUS_CLK];
@@ -166,7 +171,7 @@ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost,
 	dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n",
 		src, rate, wanted, rate / div);
 
-	return (wanted - (rate / div));
+	return wanted - (rate / div);
 }
 
 /**
@@ -203,10 +208,12 @@ static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock)
 		 best_src, clock, best);
 
 	/* select the new clock source */
-
 	if (ourhost->cur_clk != best_src) {
 		struct clk *clk = ourhost->clk_bus[best_src];
 
+		clk_enable(clk);
+		clk_disable(ourhost->clk_bus[ourhost->cur_clk]);
+
 		/* turn clock off to card before changing clock source */
 		writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 
@@ -288,6 +295,7 @@ static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host)
 static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	struct sdhci_s3c *ourhost = to_s3c(host);
+	struct device *dev = &ourhost->pdev->dev;
 	unsigned long timeout;
 	u16 clk = 0;
 
@@ -309,8 +317,8 @@ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
 	while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
 		& SDHCI_CLOCK_INT_STABLE)) {
 		if (timeout == 0) {
-			printk(KERN_ERR "%s: Internal clock never "
-				"stabilised.\n", mmc_hostname(host->mmc));
+			dev_err(dev, "%s: Internal clock never stabilised.\n",
+				mmc_hostname(host->mmc));
 			return;
 		}
 		timeout--;
@@ -404,7 +412,9 @@ static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc)
 		if (sc->ext_cd_irq &&
 		    request_threaded_irq(sc->ext_cd_irq, NULL,
 					 sdhci_s3c_gpio_card_detect_thread,
-					 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					 IRQF_TRIGGER_RISING |
+					 IRQF_TRIGGER_FALLING |
+					 IRQF_ONESHOT,
 					 dev_name(dev), sc) == 0) {
 			int status = gpio_get_value(sc->ext_cd_gpio);
 			if (pdata->ext_cd_gpio_invert)
@@ -419,9 +429,121 @@ static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc)
 	}
 }
 
+#ifdef CONFIG_OF
+static int __devinit sdhci_s3c_parse_dt(struct device *dev,
+		struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
+{
+	struct device_node *node = dev->of_node;
+	struct sdhci_s3c *ourhost = to_s3c(host);
+	u32 max_width;
+	int gpio, cnt, ret;
+
+	/* if the bus-width property is not specified, assume width as 1 */
+	if (of_property_read_u32(node, "bus-width", &max_width))
+		max_width = 1;
+	pdata->max_width = max_width;
+
+	ourhost->gpios = devm_kzalloc(dev, NUM_GPIOS(pdata->max_width) *
+				sizeof(int), GFP_KERNEL);
+	if (!ourhost->gpios)
+		return -ENOMEM;
+
+	/* get the card detection method */
+	if (of_get_property(node, "broken-cd", 0)) {
+		pdata->cd_type = S3C_SDHCI_CD_NONE;
+		goto setup_bus;
+	}
+
+	if (of_get_property(node, "non-removable", 0)) {
+		pdata->cd_type = S3C_SDHCI_CD_PERMANENT;
+		goto setup_bus;
+	}
+
+	gpio = of_get_named_gpio(node, "cd-gpios", 0);
+	if (gpio_is_valid(gpio)) {
+		pdata->cd_type = S3C_SDHCI_CD_GPIO;
+		goto found_cd;
+	} else if (gpio != -ENOENT) {
+		dev_err(dev, "invalid card detect gpio specified\n");
+		return -EINVAL;
+	}
+
+	gpio = of_get_named_gpio(node, "samsung,cd-pinmux-gpio", 0);
+	if (gpio_is_valid(gpio)) {
+		pdata->cd_type = S3C_SDHCI_CD_INTERNAL;
+		goto found_cd;
+	} else if (gpio != -ENOENT) {
+		dev_err(dev, "invalid card detect gpio specified\n");
+		return -EINVAL;
+	}
+
+	dev_info(dev, "assuming no card detect line available\n");
+	pdata->cd_type = S3C_SDHCI_CD_NONE;
+
+ found_cd:
+	if (pdata->cd_type == S3C_SDHCI_CD_GPIO) {
+		pdata->ext_cd_gpio = gpio;
+		ourhost->ext_cd_gpio = -1;
+		if (of_get_property(node, "cd-inverted", NULL))
+			pdata->ext_cd_gpio_invert = 1;
+	} else if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+		ret = gpio_request(gpio, "sdhci-cd");
+		if (ret) {
+			dev_err(dev, "card detect gpio request failed\n");
+			return -EINVAL;
+		}
+		ourhost->ext_cd_gpio = gpio;
+	}
+
+ setup_bus:
+	/* get the gpios for command, clock and data lines */
+	for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) {
+		gpio = of_get_gpio(node, cnt);
+		if (!gpio_is_valid(gpio)) {
+			dev_err(dev, "invalid gpio[%d]\n", cnt);
+			goto err_free_dt_cd_gpio;
+		}
+		ourhost->gpios[cnt] = gpio;
+	}
+
+	for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) {
+		ret = gpio_request(ourhost->gpios[cnt], "sdhci-gpio");
+		if (ret) {
+			dev_err(dev, "gpio[%d] request failed\n", cnt);
+			goto err_free_dt_gpios;
+		}
+	}
+
+	return 0;
+
+ err_free_dt_gpios:
+	while (--cnt >= 0)
+		gpio_free(ourhost->gpios[cnt]);
+ err_free_dt_cd_gpio:
+	if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL)
+		gpio_free(ourhost->ext_cd_gpio);
+	return -EINVAL;
+}
+#else
+static int __devinit sdhci_s3c_parse_dt(struct device *dev,
+		struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
+{
+	return -EINVAL;
+}
+#endif
+
+static const struct of_device_id sdhci_s3c_dt_match[];
+
 static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data(
 			struct platform_device *pdev)
 {
+#ifdef CONFIG_OF
+	if (pdev->dev.of_node) {
+		const struct of_device_id *match;
+		match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node);
+		return (struct sdhci_s3c_drv_data *)match->data;
+	}
+#endif
 	return (struct sdhci_s3c_drv_data *)
 			platform_get_device_id(pdev)->driver_data;
 }
@@ -436,7 +558,7 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret, irq, ptr, clks;
 
-	if (!pdev->dev.platform_data) {
+	if (!pdev->dev.platform_data && !pdev->dev.of_node) {
 		dev_err(dev, "no device data specified\n");
 		return -ENOENT;
 	}
@@ -452,21 +574,28 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 		dev_err(dev, "sdhci_alloc_host() failed\n");
 		return PTR_ERR(host);
 	}
+	sc = sdhci_priv(host);
 
 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata) {
 		ret = -ENOMEM;
-		goto err_io_clk;
+		goto err_pdata;
+	}
+
+	if (pdev->dev.of_node) {
+		ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata);
+		if (ret)
+			goto err_pdata;
+	} else {
+		memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata));
+		sc->ext_cd_gpio = -1; /* invalid gpio number */
 	}
-	memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata));
 
 	drv_data = sdhci_s3c_get_driver_data(pdev);
-	sc = sdhci_priv(host);
 
 	sc->host = host;
 	sc->pdev = pdev;
 	sc->pdata = pdata;
-	sc->ext_cd_gpio = -1; /* invalid gpio number */
 
 	platform_set_drvdata(pdev, host);
 
@@ -486,9 +615,8 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 
 		snprintf(name, 14, "mmc_busclk.%d", ptr);
 		clk = clk_get(dev, name);
-		if (IS_ERR(clk)) {
+		if (IS_ERR(clk))
 			continue;
-		}
 
 		clks++;
 		sc->clk_bus[ptr] = clk;
@@ -499,8 +627,6 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 		 */
 		sc->cur_clk = ptr;
 
-		clk_enable(clk);
-
 		dev_info(dev, "clock source %d: %s (%ld Hz)\n",
 			 ptr, name, clk_get_rate(clk));
 	}
@@ -511,6 +637,10 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 		goto err_no_busclks;
 	}
 
+#ifndef CONFIG_PM_RUNTIME
+	clk_enable(sc->clk_bus[sc->cur_clk]);
+#endif
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	host->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
 	if (!host->ioaddr) {
@@ -616,12 +746,17 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 	    gpio_is_valid(pdata->ext_cd_gpio))
 		sdhci_s3c_setup_card_detect_gpio(sc);
 
+#ifdef CONFIG_PM_RUNTIME
+	clk_disable(sc->clk_io);
+#endif
 	return 0;
 
  err_req_regs:
+#ifndef CONFIG_PM_RUNTIME
+	clk_disable(sc->clk_bus[sc->cur_clk]);
+#endif
 	for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
 		if (sc->clk_bus[ptr]) {
-			clk_disable(sc->clk_bus[ptr]);
 			clk_put(sc->clk_bus[ptr]);
 		}
 	}
@@ -631,6 +766,12 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 	clk_put(sc->clk_io);
 
  err_io_clk:
+	for (ptr = 0; ptr < NUM_GPIOS(sc->pdata->max_width); ptr++)
+		gpio_free(sc->gpios[ptr]);
+	if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL)
+		gpio_free(sc->ext_cd_gpio);
+
+ err_pdata:
 	sdhci_free_host(host);
 
 	return ret;
@@ -638,9 +779,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 
 static int __devexit sdhci_s3c_remove(struct platform_device *pdev)
 {
-	struct s3c_sdhci_platdata *pdata = pdev->dev.platform_data;
 	struct sdhci_host *host =  platform_get_drvdata(pdev);
 	struct sdhci_s3c *sc = sdhci_priv(host);
+	struct s3c_sdhci_platdata *pdata = sc->pdata;
 	int ptr;
 
 	if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup)
@@ -652,19 +793,30 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev)
 	if (gpio_is_valid(sc->ext_cd_gpio))
 		gpio_free(sc->ext_cd_gpio);
 
+#ifdef CONFIG_PM_RUNTIME
+	clk_enable(sc->clk_io);
+#endif
 	sdhci_remove_host(host, 1);
 
+	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
-	for (ptr = 0; ptr < 3; ptr++) {
+#ifndef CONFIG_PM_RUNTIME
+	clk_disable(sc->clk_bus[sc->cur_clk]);
+#endif
+	for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
 		if (sc->clk_bus[ptr]) {
-			clk_disable(sc->clk_bus[ptr]);
 			clk_put(sc->clk_bus[ptr]);
 		}
 	}
 	clk_disable(sc->clk_io);
 	clk_put(sc->clk_io);
 
+	if (pdev->dev.of_node) {
+		for (ptr = 0; ptr < NUM_GPIOS(sc->pdata->max_width); ptr++)
+			gpio_free(sc->gpios[ptr]);
+	}
+
 	sdhci_free_host(host);
 	platform_set_drvdata(pdev, NULL);
 
@@ -691,15 +843,28 @@ static int sdhci_s3c_resume(struct device *dev)
 static int sdhci_s3c_runtime_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_s3c *ourhost = to_s3c(host);
+	struct clk *busclk = ourhost->clk_io;
+	int ret;
+
+	ret = sdhci_runtime_suspend_host(host);
 
-	return sdhci_runtime_suspend_host(host);
+	clk_disable(ourhost->clk_bus[ourhost->cur_clk]);
+	clk_disable(busclk);
+	return ret;
 }
 
 static int sdhci_s3c_runtime_resume(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_s3c *ourhost = to_s3c(host);
+	struct clk *busclk = ourhost->clk_io;
+	int ret;
 
-	return sdhci_runtime_resume_host(host);
+	clk_enable(busclk);
+	clk_enable(ourhost->clk_bus[ourhost->cur_clk]);
+	ret = sdhci_runtime_resume_host(host);
+	return ret;
 }
 #endif
 
@@ -737,6 +902,16 @@ static struct platform_device_id sdhci_s3c_driver_ids[] = {
 };
 MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids);
 
+#ifdef CONFIG_OF
+static const struct of_device_id sdhci_s3c_dt_match[] = {
+	{ .compatible = "samsung,s3c6410-sdhci", },
+	{ .compatible = "samsung,exynos4210-sdhci",
+		.data = (void *)EXYNOS4_SDHCI_DRV_DATA },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match);
+#endif
+
 static struct platform_driver sdhci_s3c_driver = {
 	.probe		= sdhci_s3c_probe,
 	.remove		= __devexit_p(sdhci_s3c_remove),
@@ -744,6 +919,7 @@ static struct platform_driver sdhci_s3c_driver = {
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "s3c-sdhci",
+		.of_match_table = of_match_ptr(sdhci_s3c_dt_match),
 		.pm	= SDHCI_S3C_PMOPS,
 	},
 };

drivers/mmc/host/sdhci-spear.c

@@ -20,6 +20,8 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
@@ -68,8 +70,42 @@ static irqreturn_t sdhci_gpio_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_OF
+static struct sdhci_plat_data * __devinit
+sdhci_probe_config_dt(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct sdhci_plat_data *pdata = NULL;
+	int cd_gpio;
+
+	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
+	if (!gpio_is_valid(cd_gpio))
+		cd_gpio = -1;
+
+	/* If pdata is required */
+	if (cd_gpio != -1) {
+		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+		if (!pdata) {
+			dev_err(&pdev->dev, "DT: kzalloc failed\n");
+			return ERR_PTR(-ENOMEM);
+		}
+	}
+
+	pdata->card_int_gpio = cd_gpio;
+
+	return pdata;
+}
+#else
+static struct sdhci_plat_data * __devinit
+sdhci_probe_config_dt(struct platform_device *pdev)
+{
+	return ERR_PTR(-ENOSYS);
+}
+#endif
+
 static int __devinit sdhci_probe(struct platform_device *pdev)
 {
+	struct device_node *np = pdev->dev.of_node;
 	struct sdhci_host *host;
 	struct resource *iomem;
 	struct spear_sdhci *sdhci;
@@ -104,14 +140,22 @@ static int __devinit sdhci_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	ret = clk_enable(sdhci->clk);
+	ret = clk_prepare_enable(sdhci->clk);
 	if (ret) {
 		dev_dbg(&pdev->dev, "Error enabling clock\n");
 		goto put_clk;
 	}
 
-	/* overwrite platform_data */
-	sdhci->data = dev_get_platdata(&pdev->dev);
+	if (np) {
+		sdhci->data = sdhci_probe_config_dt(pdev);
+		if (IS_ERR(sdhci->data)) {
+			dev_err(&pdev->dev, "DT: Failed to get pdata\n");
+			return -ENODEV;
+		}
+	} else {
+		sdhci->data = dev_get_platdata(&pdev->dev);
+	}
+
 	pdev->dev.platform_data = sdhci;
 
 	if (pdev->dev.parent)
@@ -216,7 +260,7 @@ static int __devinit sdhci_probe(struct platform_device *pdev)
 free_host:
 	sdhci_free_host(host);
 disable_clk:
-	clk_disable(sdhci->clk);
+	clk_disable_unprepare(sdhci->clk);
 put_clk:
 	clk_put(sdhci->clk);
 err:
@@ -238,7 +282,7 @@ static int __devexit sdhci_remove(struct platform_device *pdev)
 
 	sdhci_remove_host(host, dead);
 	sdhci_free_host(host);
-	clk_disable(sdhci->clk);
+	clk_disable_unprepare(sdhci->clk);
 	clk_put(sdhci->clk);
 
 	return 0;
@@ -253,7 +297,7 @@ static int sdhci_suspend(struct device *dev)
 
 	ret = sdhci_suspend_host(host);
 	if (!ret)
-		clk_disable(sdhci->clk);
+		clk_disable_unprepare(sdhci->clk);
 
 	return ret;
 }
@@ -264,7 +308,7 @@ static int sdhci_resume(struct device *dev)
 	struct spear_sdhci *sdhci = dev_get_platdata(dev);
 	int ret;
 
-	ret = clk_enable(sdhci->clk);
+	ret = clk_prepare_enable(sdhci->clk);
 	if (ret) {
 		dev_dbg(dev, "Resume: Error enabling clock\n");
 		return ret;
@@ -276,11 +320,20 @@ static int sdhci_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(sdhci_pm_ops, sdhci_suspend, sdhci_resume);
 
+#ifdef CONFIG_OF
+static const struct of_device_id sdhci_spear_id_table[] = {
+	{ .compatible = "st,spear300-sdhci" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, sdhci_spear_id_table);
+#endif
+
 static struct platform_driver sdhci_driver = {
 	.driver = {
 		.name	= "sdhci",
 		.owner	= THIS_MODULE,
 		.pm	= &sdhci_pm_ops,
+		.of_match_table = of_match_ptr(sdhci_spear_id_table),
 	},
 	.probe		= sdhci_probe,
 	.remove		= __devexit_p(sdhci_remove),

drivers/mmc/host/sdhci-tegra.c

@@ -257,10 +257,9 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
 	int rc;
 
 	match = of_match_device(sdhci_tegra_dt_match, &pdev->dev);
-	if (match)
-		soc_data = match->data;
-	else
-		soc_data = &soc_data_tegra20;
+	if (!match)
+		return -EINVAL;
+	soc_data = match->data;
 
 	host = sdhci_pltfm_init(pdev, soc_data->pdata);
 	if (IS_ERR(host))

drivers/mmc/host/sdhci.c

@@ -28,6 +28,7 @@
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
+#include <linux/mmc/slot-gpio.h>
 
 #include "sdhci.h"
 
@@ -1293,6 +1294,13 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 		present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
 				SDHCI_CARD_PRESENT;
 
+	/* If we're using a cd-gpio, testing the presence bit might fail. */
+	if (!present) {
+		int ret = mmc_gpio_get_cd(host->mmc);
+		if (ret > 0)
+			present = true;
+	}
+
 	if (!present || host->flags & SDHCI_DEVICE_DEAD) {
 		host->mrq->cmd->error = -ENOMEDIUM;
 		tasklet_schedule(&host->finish_tasklet);
@@ -1597,57 +1605,65 @@ static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
-static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
-						struct mmc_ios *ios)
+static int sdhci_do_3_3v_signal_voltage_switch(struct sdhci_host *host,
+						u16 ctrl)
 {
-	u8 pwr;
-	u16 clk, ctrl;
-	u32 present_state;
+	int ret;
 
-	/*
-	 * Signal Voltage Switching is only applicable for Host Controllers
-	 * v3.00 and above.
-	 */
-	if (host->version < SDHCI_SPEC_300)
-		return 0;
+	/* Set 1.8V Signal Enable in the Host Control2 register to 0 */
+	ctrl &= ~SDHCI_CTRL_VDD_180;
+	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
-	/*
-	 * We first check whether the request is to set signalling voltage
-	 * to 3.3V. If so, we change the voltage to 3.3V and return quickly.
-	 */
+	if (host->vqmmc) {
+		ret = regulator_set_voltage(host->vqmmc, 3300000, 3300000);
+		if (ret) {
+			pr_warning("%s: Switching to 3.3V signalling voltage "
+				   " failed\n", mmc_hostname(host->mmc));
+			return -EIO;
+		}
+	}
+	/* Wait for 5ms */
+	usleep_range(5000, 5500);
+
+	/* 3.3V regulator output should be stable within 5 ms */
 	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
-	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
-		/* Set 1.8V Signal Enable in the Host Control2 register to 0 */
-		ctrl &= ~SDHCI_CTRL_VDD_180;
-		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+	if (!(ctrl & SDHCI_CTRL_VDD_180))
+		return 0;
 
-		/* Wait for 5ms */
-		usleep_range(5000, 5500);
+	pr_warning("%s: 3.3V regulator output did not became stable\n",
+		   mmc_hostname(host->mmc));
 
-		/* 3.3V regulator output should be stable within 5 ms */
-		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
-		if (!(ctrl & SDHCI_CTRL_VDD_180))
-			return 0;
-		else {
-			pr_info(DRIVER_NAME ": Switching to 3.3V "
-				"signalling voltage failed\n");
-			return -EIO;
-		}
-	} else if (!(ctrl & SDHCI_CTRL_VDD_180) &&
-		  (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)) {
-		/* Stop SDCLK */
-		clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
-		clk &= ~SDHCI_CLOCK_CARD_EN;
-		sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+	return -EIO;
+}
 
-		/* Check whether DAT[3:0] is 0000 */
-		present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
-		if (!((present_state & SDHCI_DATA_LVL_MASK) >>
-		       SDHCI_DATA_LVL_SHIFT)) {
-			/*
-			 * Enable 1.8V Signal Enable in the Host Control2
-			 * register
-			 */
+static int sdhci_do_1_8v_signal_voltage_switch(struct sdhci_host *host,
+						u16 ctrl)
+{
+	u8 pwr;
+	u16 clk;
+	u32 present_state;
+	int ret;
+
+	/* Stop SDCLK */
+	clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+	clk &= ~SDHCI_CLOCK_CARD_EN;
+	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+	/* Check whether DAT[3:0] is 0000 */
+	present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
+	if (!((present_state & SDHCI_DATA_LVL_MASK) >>
+	       SDHCI_DATA_LVL_SHIFT)) {
+		/*
+		 * Enable 1.8V Signal Enable in the Host Control2
+		 * register
+		 */
+		if (host->vqmmc)
+			ret = regulator_set_voltage(host->vqmmc,
+				1800000, 1800000);
+		else
+			ret = 0;
+
+		if (!ret) {
 			ctrl |= SDHCI_CTRL_VDD_180;
 			sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 
@@ -1656,7 +1672,7 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
 
 			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 			if (ctrl & SDHCI_CTRL_VDD_180) {
-				/* Provide SDCLK again and wait for 1ms*/
+				/* Provide SDCLK again and wait for 1ms */
 				clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
 				clk |= SDHCI_CLOCK_CARD_EN;
 				sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
@@ -1673,29 +1689,55 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
 					return 0;
 			}
 		}
+	}
 
-		/*
-		 * If we are here, that means the switch to 1.8V signaling
-		 * failed. We power cycle the card, and retry initialization
-		 * sequence by setting S18R to 0.
-		 */
-		pwr = sdhci_readb(host, SDHCI_POWER_CONTROL);
-		pwr &= ~SDHCI_POWER_ON;
-		sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
-		if (host->vmmc)
-			regulator_disable(host->vmmc);
+	/*
+	 * If we are here, that means the switch to 1.8V signaling
+	 * failed. We power cycle the card, and retry initialization
+	 * sequence by setting S18R to 0.
+	 */
+	pwr = sdhci_readb(host, SDHCI_POWER_CONTROL);
+	pwr &= ~SDHCI_POWER_ON;
+	sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+	if (host->vmmc)
+		regulator_disable(host->vmmc);
 
-		/* Wait for 1ms as per the spec */
-		usleep_range(1000, 1500);
-		pwr |= SDHCI_POWER_ON;
-		sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
-		if (host->vmmc)
-			regulator_enable(host->vmmc);
+	/* Wait for 1ms as per the spec */
+	usleep_range(1000, 1500);
+	pwr |= SDHCI_POWER_ON;
+	sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+	if (host->vmmc)
+		regulator_enable(host->vmmc);
 
-		pr_info(DRIVER_NAME ": Switching to 1.8V signalling "
-			"voltage failed, retrying with S18R set to 0\n");
-		return -EAGAIN;
-	} else
+	pr_warning("%s: Switching to 1.8V signalling voltage failed, "
+		   "retrying with S18R set to 0\n", mmc_hostname(host->mmc));
+
+	return -EAGAIN;
+}
+
+static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
+						struct mmc_ios *ios)
+{
+	u16 ctrl;
+
+	/*
+	 * Signal Voltage Switching is only applicable for Host Controllers
+	 * v3.00 and above.
+	 */
+	if (host->version < SDHCI_SPEC_300)
+		return 0;
+
+	/*
+	 * We first check whether the request is to set signalling voltage
+	 * to 3.3V. If so, we change the voltage to 3.3V and return quickly.
+	 */
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
+		return sdhci_do_3_3v_signal_voltage_switch(host, ctrl);
+	else if (!(ctrl & SDHCI_CTRL_VDD_180) &&
+			(ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180))
+		return sdhci_do_1_8v_signal_voltage_switch(host, ctrl);
+	else
 		/* No signal voltage switch required */
 		return 0;
 }
@@ -2802,6 +2844,18 @@ int sdhci_add_host(struct sdhci_host *host)
 	    !(host->mmc->caps & MMC_CAP_NONREMOVABLE))
 		mmc->caps |= MMC_CAP_NEEDS_POLL;
 
+	/* If vqmmc regulator and no 1.8V signalling, then there's no UHS */
+	host->vqmmc = regulator_get(mmc_dev(mmc), "vqmmc");
+	if (IS_ERR(host->vqmmc)) {
+		pr_info("%s: no vqmmc regulator found\n", mmc_hostname(mmc));
+		host->vqmmc = NULL;
+	}
+	else if (regulator_is_supported_voltage(host->vqmmc, 1800000, 1800000))
+		regulator_enable(host->vqmmc);
+	else
+		caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
+		       SDHCI_SUPPORT_DDR50);
+
 	/* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
 	if (caps[1] & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
 		       SDHCI_SUPPORT_DDR50))
@@ -2832,15 +2886,6 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (caps[1] & SDHCI_DRIVER_TYPE_D)
 		mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
 
-	/*
-	 * If Power Off Notify capability is enabled by the host,
-	 * set notify to short power off notify timeout value.
-	 */
-	if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
-		mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
-	else
-		mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE;
-
 	/* Initial value for re-tuning timer count */
 	host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
 			      SDHCI_RETUNING_TIMER_COUNT_SHIFT;
@@ -2862,7 +2907,8 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (IS_ERR(host->vmmc)) {
 		pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
 		host->vmmc = NULL;
-	}
+	} else
+		regulator_enable(host->vmmc);
 
 #ifdef CONFIG_REGULATOR
 	if (host->vmmc) {
@@ -3119,8 +3165,15 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
 	tasklet_kill(&host->card_tasklet);
 	tasklet_kill(&host->finish_tasklet);
 
-	if (host->vmmc)
+	if (host->vmmc) {
+		regulator_disable(host->vmmc);
 		regulator_put(host->vmmc);
+	}
+
+	if (host->vqmmc) {
+		regulator_disable(host->vqmmc);
+		regulator_put(host->vqmmc);
+	}
 
 	kfree(host->adma_desc);
 	kfree(host->align_buffer);

drivers/mmc/host/sh_mmcif.c

@@ -1213,7 +1213,9 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 		sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE);
 		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
 	} else if (state & INT_DTRANE) {
-		sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE);
+		sh_mmcif_writel(host->addr, MMCIF_CE_INT,
+			~(INT_CMD12DRE | INT_CMD12RBE |
+			  INT_CMD12CRE | INT_DTRANE));
 		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
 	} else if (state & INT_CMD12RBE) {
 		sh_mmcif_writel(host->addr, MMCIF_CE_INT,
@@ -1229,6 +1231,10 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 		host->sd_error = true;
 		dev_dbg(&host->pd->dev, "int err state = %08x\n", state);
 	}
+	if (host->state == STATE_IDLE) {
+		dev_info(&host->pd->dev, "Spurious IRQ status 0x%x", state);
+		return IRQ_HANDLED;
+	}
 	if (state & ~(INT_CMD12RBE | INT_CMD12CRE)) {
 		if (!host->dma_active)
 			return IRQ_WAKE_THREAD;

drivers/mmc/host/via-sdmmc.c

@@ -1337,21 +1337,7 @@ static struct pci_driver via_sd_driver = {
 	.resume = via_sd_resume,
 };
 
-static int __init via_sd_drv_init(void)
-{
-	pr_info(DRV_NAME ": VIA SD/MMC Card Reader driver "
-		"(C) 2008 VIA Technologies, Inc.\n");
-
-	return pci_register_driver(&via_sd_driver);
-}
-
-static void __exit via_sd_drv_exit(void)
-{
-	pci_unregister_driver(&via_sd_driver);
-}
-
-module_init(via_sd_drv_init);
-module_exit(via_sd_drv_exit);
+module_pci_driver(via_sd_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("VIA Technologies Inc.");

drivers/mmc/host/vub300.c

@@ -2358,9 +2358,9 @@ static int vub300_probe(struct usb_interface *interface,
 	 * which is contained at the end of struct mmc
 	 */
 error4:
-	usb_free_urb(command_out_urb);
-error1:
 	usb_free_urb(command_res_urb);
+error1:
+	usb_free_urb(command_out_urb);
 error0:
 	return retval;
 }

include/linux/mmc/card.h

@@ -57,6 +57,7 @@ struct mmc_ext_csd {
 	unsigned int		sa_timeout;		/* Units: 100ns */
 	unsigned int		generic_cmd6_time;	/* Units: 10ms */
 	unsigned int            power_off_longtime;     /* Units: ms */
+	u8			power_off_notification;	/* state */
 	unsigned int		hs_max_dtr;
 #define MMC_HIGH_26_MAX_DTR	26000000
 #define MMC_HIGH_52_MAX_DTR	52000000
@@ -76,10 +77,13 @@ struct mmc_ext_csd {
 	bool			hpi_en;			/* HPI enablebit */
 	bool			hpi;			/* HPI support bit */
 	unsigned int		hpi_cmd;		/* cmd used as HPI */
+	bool			bkops;		/* background support bit */
+	bool			bkops_en;	/* background enable bit */
 	unsigned int            data_sector_size;       /* 512 bytes or 4KB */
 	unsigned int            data_tag_unit_size;     /* DATA TAG UNIT size */
 	unsigned int		boot_ro_lock;		/* ro lock support */
 	bool			boot_ro_lockable;
+	u8			raw_exception_status;	/* 53 */
 	u8			raw_partition_support;	/* 160 */
 	u8			raw_erased_mem_count;	/* 181 */
 	u8			raw_ext_csd_structure;	/* 194 */
@@ -93,6 +97,7 @@ struct mmc_ext_csd {
 	u8			raw_sec_erase_mult;	/* 230 */
 	u8			raw_sec_feature_support;/* 231 */
 	u8			raw_trim_mult;		/* 232 */
+	u8			raw_bkops_status;	/* 246 */
 	u8			raw_sectors[4];		/* 212 - 4 bytes */
 
 	unsigned int            feature_support;
@@ -225,7 +230,7 @@ struct mmc_card {
 #define MMC_CARD_SDXC		(1<<6)		/* card is SDXC */
 #define MMC_CARD_REMOVED	(1<<7)		/* card has been removed */
 #define MMC_STATE_HIGHSPEED_200	(1<<8)		/* card is in HS200 mode */
-#define MMC_STATE_SLEEP		(1<<9)		/* card is in sleep state */
+#define MMC_STATE_DOING_BKOPS	(1<<10)		/* card is doing BKOPS */
 	unsigned int		quirks; 	/* card quirks */
 #define MMC_QUIRK_LENIENT_FN0	(1<<0)		/* allow SDIO FN0 writes outside of the VS CCCR range */
 #define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1)	/* use func->cur_blksize */
@@ -241,11 +246,6 @@ struct mmc_card {
 #define MMC_QUIRK_LONG_READ_TIME (1<<9)		/* Data read time > CSD says */
 #define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10)	/* Skip secure for erase/trim */
 						/* byte mode */
-	unsigned int    poweroff_notify_state;	/* eMMC4.5 notify feature */
-#define MMC_NO_POWER_NOTIFICATION	0
-#define MMC_POWERED_ON			1
-#define MMC_POWEROFF_SHORT		2
-#define MMC_POWEROFF_LONG		3
 
 	unsigned int		erase_size;	/* erase size in sectors */
  	unsigned int		erase_shift;	/* if erase unit is power 2 */
@@ -392,7 +392,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_sd_card_uhs(c)	((c)->state & MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
 #define mmc_card_removed(c)	((c) && ((c)->state & MMC_CARD_REMOVED))
-#define mmc_card_is_sleep(c)	((c)->state & MMC_STATE_SLEEP)
+#define mmc_card_doing_bkops(c)	((c)->state & MMC_STATE_DOING_BKOPS)
 
 #define mmc_card_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
 #define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
@@ -404,9 +404,9 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
 #define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED)
-#define mmc_card_set_sleep(c)	((c)->state |= MMC_STATE_SLEEP)
+#define mmc_card_set_doing_bkops(c)	((c)->state |= MMC_STATE_DOING_BKOPS)
+#define mmc_card_clr_doing_bkops(c)	((c)->state &= ~MMC_STATE_DOING_BKOPS)
 
-#define mmc_card_clr_sleep(c)	((c)->state &= ~MMC_STATE_SLEEP)
 /*
  * Quirk add/remove for MMC products.
  */

include/linux/mmc/core.h

@@ -134,6 +134,8 @@ struct mmc_host;
 struct mmc_card;
 struct mmc_async_req;
 
+extern int mmc_stop_bkops(struct mmc_card *);
+extern int mmc_read_bkops_status(struct mmc_card *);
 extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
 					   struct mmc_async_req *, int *);
 extern int mmc_interrupt_hpi(struct mmc_card *);
@@ -142,6 +144,8 @@ extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
 extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
 	struct mmc_command *, int);
+extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
+extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool);
 extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
 
 #define MMC_ERASE_ARG		0x00000000

include/linux/mmc/dw_mmc.h

@@ -78,6 +78,10 @@ struct mmc_data;
  * @data_offset: Set the offset of DATA register according to VERID.
  * @dev: Device associated with the MMC controller.
  * @pdata: Platform data associated with the MMC controller.
+ * @drv_data: Driver specific data for identified variant of the controller
+ * @priv: Implementation defined private data.
+ * @biu_clk: Pointer to bus interface unit clock instance.
+ * @ciu_clk: Pointer to card interface unit clock instance.
  * @slot: Slots sharing this MMC controller.
  * @fifo_depth: depth of FIFO.
  * @data_shift: log2 of FIFO item size.
@@ -156,8 +160,12 @@ struct dw_mci {
 	u32			fifoth_val;
 	u16			verid;
 	u16			data_offset;
-	struct device		dev;
+	struct device		*dev;
 	struct dw_mci_board	*pdata;
+	struct dw_mci_drv_data	*drv_data;
+	void			*priv;
+	struct clk		*biu_clk;
+	struct clk		*ciu_clk;
 	struct dw_mci_slot	*slot[MAX_MCI_SLOTS];
 
 	/* FIFO push and pull */
@@ -201,7 +209,8 @@ struct dw_mci_dma_ops {
 #define DW_MCI_QUIRK_HIGHSPEED			BIT(2)
 /* Unreliable card detection */
 #define DW_MCI_QUIRK_BROKEN_CARD_DETECTION	BIT(3)
-
+/* Write Protect detection not available */
+#define DW_MCI_QUIRK_NO_WRITE_PROTECT		BIT(4)
 
 struct dma_pdata;
 
@@ -218,7 +227,7 @@ struct dw_mci_board {
 	u32 num_slots;
 
 	u32 quirks; /* Workaround / Quirk flags */
-	unsigned int bus_hz; /* Bus speed */
+	unsigned int bus_hz; /* Clock speed at the cclk_in pad */
 
 	unsigned int caps;	/* Capabilities */
 	unsigned int caps2;	/* More capabilities */

include/linux/mmc/host.h

@@ -259,10 +259,6 @@ struct mmc_host {
 #define MMC_CAP2_RO_ACTIVE_HIGH	(1 << 11)	/* Write-protect signal active high */
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
-	unsigned int        power_notify_type;
-#define MMC_HOST_PW_NOTIFY_NONE		0
-#define MMC_HOST_PW_NOTIFY_SHORT	1
-#define MMC_HOST_PW_NOTIFY_LONG		2
 
 #ifdef CONFIG_MMC_CLKGATE
 	int			clk_requests;	/* internal reference counter */
@@ -300,6 +296,7 @@ struct mmc_host {
 #endif
 
 	int			rescan_disable;	/* disable card detection */
+	int			rescan_entered;	/* used with nonremovable devices */
 
 	struct mmc_card		*card;		/* device attached to this host */
 

include/linux/mmc/mmc.h

@@ -139,6 +139,7 @@ static inline bool mmc_op_multi(u32 opcode)
 #define R1_CURRENT_STATE(x)	((x & 0x00001E00) >> 9)	/* sx, b (4 bits) */
 #define R1_READY_FOR_DATA	(1 << 8)	/* sx, a */
 #define R1_SWITCH_ERROR		(1 << 7)	/* sx, c */
+#define R1_EXCEPTION_EVENT	(1 << 6)	/* sx, a */
 #define R1_APP_CMD		(1 << 5)	/* sr, c */
 
 #define R1_STATE_IDLE	0
@@ -274,12 +275,15 @@ struct _mmc_csd {
 #define EXT_CSD_FLUSH_CACHE		32      /* W */
 #define EXT_CSD_CACHE_CTRL		33      /* R/W */
 #define EXT_CSD_POWER_OFF_NOTIFICATION	34	/* R/W */
+#define EXT_CSD_EXP_EVENTS_STATUS	54	/* RO */
 #define EXT_CSD_DATA_SECTOR_SIZE	61	/* R */
 #define EXT_CSD_GP_SIZE_MULT		143	/* R/W */
 #define EXT_CSD_PARTITION_ATTRIBUTE	156	/* R/W */
 #define EXT_CSD_PARTITION_SUPPORT	160	/* RO */
 #define EXT_CSD_HPI_MGMT		161	/* R/W */
 #define EXT_CSD_RST_N_FUNCTION		162	/* R/W */
+#define EXT_CSD_BKOPS_EN		163	/* R/W */
+#define EXT_CSD_BKOPS_START		164	/* W */
 #define EXT_CSD_SANITIZE_START		165     /* W */
 #define EXT_CSD_WR_REL_PARAM		166	/* RO */
 #define EXT_CSD_BOOT_WP			173	/* R/W */
@@ -313,11 +317,13 @@ struct _mmc_csd {
 #define EXT_CSD_PWR_CL_200_360		237	/* RO */
 #define EXT_CSD_PWR_CL_DDR_52_195	238	/* RO */
 #define EXT_CSD_PWR_CL_DDR_52_360	239	/* RO */
+#define EXT_CSD_BKOPS_STATUS		246	/* RO */
 #define EXT_CSD_POWER_OFF_LONG_TIME	247	/* RO */
 #define EXT_CSD_GENERIC_CMD6_TIME	248	/* RO */
 #define EXT_CSD_CACHE_SIZE		249	/* RO, 4 bytes */
 #define EXT_CSD_TAG_UNIT_SIZE		498	/* RO */
 #define EXT_CSD_DATA_TAG_SUPPORT	499	/* RO */
+#define EXT_CSD_BKOPS_SUPPORT		502	/* RO */
 #define EXT_CSD_HPI_FEATURES		503	/* RO */
 
 /*
@@ -377,6 +383,19 @@ struct _mmc_csd {
 #define EXT_CSD_PWR_CL_4BIT_MASK	0x0F	/* 8 bit PWR CLS */
 #define EXT_CSD_PWR_CL_8BIT_SHIFT	4
 #define EXT_CSD_PWR_CL_4BIT_SHIFT	0
+/*
+ * EXCEPTION_EVENT_STATUS field
+ */
+#define EXT_CSD_URGENT_BKOPS		BIT(0)
+#define EXT_CSD_DYNCAP_NEEDED		BIT(1)
+#define EXT_CSD_SYSPOOL_EXHAUSTED	BIT(2)
+#define EXT_CSD_PACKED_FAILURE		BIT(3)
+
+/*
+ * BKOPS status level
+ */
+#define EXT_CSD_BKOPS_LEVEL_2		0x2
+
 /*
  * MMC_SWITCH access modes
  */

include/linux/mmc/sdhci.h

@@ -97,7 +97,8 @@ struct sdhci_host {
 
 	const struct sdhci_ops *ops;	/* Low level hw interface */
 
-	struct regulator *vmmc;	/* Power regulator */
+	struct regulator *vmmc;		/* Power regulator (vmmc) */
+	struct regulator *vqmmc;	/* Signaling regulator (vccq) */
 
 	/* Internal data */
 	struct mmc_host *mmc;	/* MMC structure */

include/linux/platform_data/pxa_sdhci.h

@@ -49,6 +49,7 @@ struct sdhci_pxa_platdata {
 	bool		ext_cd_gpio_invert;
 	unsigned int	max_speed;
 	unsigned int	host_caps;
+	unsigned int	host_caps2;
 	unsigned int	quirks;
 	unsigned int	pm_caps;
 };