[PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Hi, 

Patches have been tested on top of Stephen's clock controller
patches[1] and recent fixes for chipidea msm glue layer driver
posted here[2]. Hardware platform AP8074 DragonBoard. Only gadget
mode utilized for now. 

CV Test Suite engine "Chapter 9 tests" are passing except
"Halt Endpoint Test".

usbtest driver report following failure:
test 13 --> 32 (Broken pipe) 		ep 81 couldn't set halt, -32

This will be investigated further. 
Patches could be applied cleanly on top of the usb-3.13-rc1.

Regards,
Ivan

[1] http://comments.gmane.org/gmane.linux.ports.arm.msm/5375
[2] https://lkml.org/lkml/2013/11/11/310

v4
-- 
* Squashed checkpatch.pl warning fixes patches
* Squashed dr_mode refactoring with default mode removal
* Dropped patch 10 - usb: phy: msm: Switch clock consumer strings
* Fixed comments from review.
* Utilize reset-framework for LINK and PHY resets if DT is used.
* Added support from second PHY device control.
* Ported reset procedure from codeaurora tree for new chipsets
 
v3
--
* In patch 1 - functions for reseting PHY and LINK controller just
  call platform code if available.
* New stuff is: cleaning up unneeded/unused driver state variables
* Simplified regulator names. There is no references to these names
  in tree, so there should not be a problem with this.
* Replace the USB specific clock names with the more standard 'core' 
  and 'iface' ... names.   
* Added devicetree support 

v2
--
* Fix compilation issue in patch 1
* Separate regulator changes
* Merge devm_ related changes to one commit
* Drop Lindent patch

v1
--
Following patches make initial cleanup of usb phy found in the Qualcomm
chipsets. Changes include:
* Build time error fix.
* Move driver to Managed Device Resource allocation.
* Checkpatch warnings and error fixes
* Removed usage of global regulators variables.

Ivan T. Ivanov (15):
  usb: phy: msm: Move mach dependent code to platform data
  usb: phy: msm: Move global regulators variables to driver state
  usb: phy: msm: Migrate to Managed Device Resource allocation
  usb: phy: msm: Remove unnecessarily check for valid regulators.
  usb: phy: msm: Fix checkpatch.pl warnings
  usb: phy: msm: Replace custom enum usb_mode_type with enum
    usb_dr_mode
  usb: phy: msm: Remove unused pclk_src_name
  usb: phy: msm: Remove HSUSB prefix from regulator names
  usb: phy: msm: Properly check result from platform_get_irq()
  usb: phy: msm: Add device tree support and binding information
  usb: phy: msm: Use reset framework for LINK and PHY resets
  usb: phy: msm: Add support for secondary PHY control
  usb: phy: msm: Correct USB PHY Reset sequence for newer platform
  usb: phy: msm: Handle disconnect events
  usb: phy: msm: Vote for corner of VDD CX instead of voltage of VDD CX

 .../devicetree/bindings/usb/msm-hsusb.txt          |   78 ++-
 arch/arm/mach-msm/board-msm7x30.c                  |   37 +-
 arch/arm/mach-msm/board-qsd8x50.c                  |   37 +-
 drivers/usb/phy/phy-msm-usb.c                      |  664 +++++++++++---------
 include/linux/usb/msm_hsusb.h                      |   36 +-
 include/linux/usb/msm_hsusb_hw.h                   |    6 +
 6 files changed, 529 insertions(+), 329 deletions(-)

-- 
1.7.9.5

[PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

This patch fix compilation error when driver is compiled
in multi-platform builds.

drivers/built-in.o: In function `msm_otg_link_clk_reset':
./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'

Use platform data supplied reset handlers and adjust error
messages reported when reset sequence fail.

This is an intermediate step before adding support for reset
framework and newer targets.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Acked-by: David Brown <davidb@codeaurora.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm/mach-msm/board-msm7x30.c |   35 +++++++++++++++++++++++++++++++++++
 arch/arm/mach-msm/board-qsd8x50.c |   35 +++++++++++++++++++++++++++++++++++
 drivers/usb/phy/phy-msm-usb.c     |   35 +++++++++++++++--------------------
 include/linux/usb/msm_hsusb.h     |    3 +++
 4 files changed, 88 insertions(+), 20 deletions(-)

diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index f9af5a4..46de789 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -30,6 +30,7 @@
 #include <asm/memory.h>
 #include <asm/setup.h>
 
+#include <mach/clk.h>
 #include <mach/msm_iomap.h>
 #include <mach/dma.h>
 
@@ -60,10 +61,44 @@ static int hsusb_phy_init_seq[] = {
 	-1
 };
 
+static int hsusb_link_clk_reset(struct clk *link_clk, bool assert)
+{
+	int ret;
+
+	if (assert) {
+		ret = clk_reset(link_clk, CLK_RESET_ASSERT);
+		if (ret)
+			pr_err("usb hs_clk assert failed\n");
+	} else {
+		ret = clk_reset(link_clk, CLK_RESET_DEASSERT);
+		if (ret)
+			pr_err("usb hs_clk deassert failed\n");
+	}
+	return ret;
+}
+
+static int hsusb_phy_clk_reset(struct clk *phy_clk)
+{
+	int ret;
+
+	ret = clk_reset(phy_clk, CLK_RESET_ASSERT);
+	if (ret) {
+		pr_err("usb phy clk assert failed\n");
+		return ret;
+	}
+	usleep_range(10000, 12000);
+	ret = clk_reset(phy_clk, CLK_RESET_DEASSERT);
+	if (ret)
+		pr_err("usb phy clk deassert failed\n");
+	return ret;
+}
+
 static struct msm_otg_platform_data msm_otg_pdata = {
 	.phy_init_seq		= hsusb_phy_init_seq,
 	.mode                   = USB_PERIPHERAL,
 	.otg_control		= OTG_PHY_CONTROL,
+	.link_clk_reset		= hsusb_link_clk_reset,
+	.phy_clk_reset		= hsusb_phy_clk_reset,
 };
 
 struct msm_gpiomux_config msm_gpiomux_configs[GPIOMUX_NGPIOS] = {
diff --git a/arch/arm/mach-msm/board-qsd8x50.c b/arch/arm/mach-msm/board-qsd8x50.c
index 5f933bc..9169ec3 100644
--- a/arch/arm/mach-msm/board-qsd8x50.c
+++ b/arch/arm/mach-msm/board-qsd8x50.c
@@ -31,6 +31,7 @@
 #include <mach/irqs.h>
 #include <mach/sirc.h>
 #include <mach/vreg.h>
+#include <mach/clk.h>
 #include <linux/platform_data/mmc-msm_sdcc.h>
 
 #include "devices.h"
@@ -81,10 +82,44 @@ static int hsusb_phy_init_seq[] = {
 	-1
 };
 
+static int hsusb_link_clk_reset(struct clk *link_clk, bool assert)
+{
+	int ret;
+
+	if (assert) {
+		ret = clk_reset(link_clk, CLK_RESET_ASSERT);
+		if (ret)
+			pr_err("usb hs_clk assert failed\n");
+	} else {
+		ret = clk_reset(link_clk, CLK_RESET_DEASSERT);
+		if (ret)
+			pr_err("usb hs_clk deassert failed\n");
+	}
+	return ret;
+}
+
+static int hsusb_phy_clk_reset(struct clk *phy_clk)
+{
+	int ret;
+
+	ret = clk_reset(phy_clk, CLK_RESET_ASSERT);
+	if (ret) {
+		pr_err("usb phy clk assert failed\n");
+		return ret;
+	}
+	usleep_range(10000, 12000);
+	ret = clk_reset(phy_clk, CLK_RESET_DEASSERT);
+	if (ret)
+		pr_err("usb phy clk deassert failed\n");
+	return ret;
+}
+
 static struct msm_otg_platform_data msm_otg_pdata = {
 	.phy_init_seq		= hsusb_phy_init_seq,
 	.mode                   = USB_PERIPHERAL,
 	.otg_control		= OTG_PHY_CONTROL,
+	.link_clk_reset		= hsusb_link_clk_reset,
+	.phy_clk_reset		= hsusb_phy_clk_reset,
 };
 
 static struct platform_device *devices[] __initdata = {
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index e9d4cd9..9a47d44 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -40,8 +40,6 @@
 #include <linux/usb/msm_hsusb_hw.h>
 #include <linux/regulator/consumer.h>
 
-#include <mach/clk.h>
-
 #define MSM_USB_BASE	(motg->regs)
 #define DRIVER_NAME	"msm_otg"
 
@@ -308,33 +306,30 @@ static void ulpi_init(struct msm_otg *motg)
 
 static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
 {
-	int ret;
+	int ret = 0;
+
+	if (!motg->pdata->link_clk_reset)
+		return ret;
+
+	ret = motg->pdata->link_clk_reset(motg->clk, assert);
+	if (ret)
+		dev_err(motg->phy.dev, "usb link clk reset %s failed\n",
+			assert ? "assert" : "deassert");
 
-	if (assert) {
-		ret = clk_reset(motg->clk, CLK_RESET_ASSERT);
-		if (ret)
-			dev_err(motg->phy.dev, "usb hs_clk assert failed\n");
-	} else {
-		ret = clk_reset(motg->clk, CLK_RESET_DEASSERT);
-		if (ret)
-			dev_err(motg->phy.dev, "usb hs_clk deassert failed\n");
-	}
 	return ret;
 }
 
 static int msm_otg_phy_clk_reset(struct msm_otg *motg)
 {
-	int ret;
+	int ret = 0;
 
-	ret = clk_reset(motg->phy_reset_clk, CLK_RESET_ASSERT);
-	if (ret) {
-		dev_err(motg->phy.dev, "usb phy clk assert failed\n");
+	if (!motg->pdata->phy_clk_reset)
 		return ret;
-	}
-	usleep_range(10000, 12000);
-	ret = clk_reset(motg->phy_reset_clk, CLK_RESET_DEASSERT);
+
+	ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk);
 	if (ret)
-		dev_err(motg->phy.dev, "usb phy clk deassert failed\n");
+		dev_err(motg->phy.dev, "usb phy clk reset failed\n");
+
 	return ret;
 }
 
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index 22a396c..3275483 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -20,6 +20,7 @@
 
 #include <linux/types.h>
 #include <linux/usb/otg.h>
+#include <linux/clk.h>
 
 /**
  * Supported USB modes
@@ -135,6 +136,8 @@ struct msm_otg_platform_data {
 	enum msm_usb_phy_type phy_type;
 	void (*setup_gpio)(enum usb_otg_state state);
 	char *pclk_src_name;
+	int (*link_clk_reset)(struct clk *link_clk, bool assert);
+	int (*phy_clk_reset)(struct clk *phy_clk);
 };
 
 /**
-- 
1.7.9.5

[PATCH v4 02/15] usb: phy: msm: Move global regulators variables to driver state

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |   82 ++++++++++++++++++++---------------------
 include/linux/usb/msm_hsusb.h |    3 ++
 2 files changed, 42 insertions(+), 43 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 9a47d44..c22cbd8 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -58,47 +58,43 @@
 #define USB_PHY_VDD_DIG_VOL_MIN	1000000 /* uV */
 #define USB_PHY_VDD_DIG_VOL_MAX	1320000 /* uV */
 
-static struct regulator *hsusb_3p3;
-static struct regulator *hsusb_1p8;
-static struct regulator *hsusb_vddcx;
-
 static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 {
 	int ret = 0;
 
 	if (init) {
-		hsusb_vddcx = regulator_get(motg->phy.dev, "HSUSB_VDDCX");
-		if (IS_ERR(hsusb_vddcx)) {
+		motg->vddcx = regulator_get(motg->phy.dev, "HSUSB_VDDCX");
+		if (IS_ERR(motg->vddcx)) {
 			dev_err(motg->phy.dev, "unable to get hsusb vddcx\n");
-			return PTR_ERR(hsusb_vddcx);
+			return PTR_ERR(motg->vddcx);
 		}
 
-		ret = regulator_set_voltage(hsusb_vddcx,
+		ret = regulator_set_voltage(motg->vddcx,
 				USB_PHY_VDD_DIG_VOL_MIN,
 				USB_PHY_VDD_DIG_VOL_MAX);
 		if (ret) {
 			dev_err(motg->phy.dev, "unable to set the voltage "
 					"for hsusb vddcx\n");
-			regulator_put(hsusb_vddcx);
+			regulator_put(motg->vddcx);
 			return ret;
 		}
 
-		ret = regulator_enable(hsusb_vddcx);
+		ret = regulator_enable(motg->vddcx);
 		if (ret) {
 			dev_err(motg->phy.dev, "unable to enable hsusb vddcx\n");
-			regulator_put(hsusb_vddcx);
+			regulator_put(motg->vddcx);
 		}
 	} else {
-		ret = regulator_set_voltage(hsusb_vddcx, 0,
+		ret = regulator_set_voltage(motg->vddcx, 0,
 			USB_PHY_VDD_DIG_VOL_MAX);
 		if (ret)
 			dev_err(motg->phy.dev, "unable to set the voltage "
 					"for hsusb vddcx\n");
-		ret = regulator_disable(hsusb_vddcx);
+		ret = regulator_disable(motg->vddcx);
 		if (ret)
 			dev_err(motg->phy.dev, "unable to disable hsusb vddcx\n");
 
-		regulator_put(hsusb_vddcx);
+		regulator_put(motg->vddcx);
 	}
 
 	return ret;
@@ -109,38 +105,38 @@ static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
 	int rc = 0;
 
 	if (init) {
-		hsusb_3p3 = regulator_get(motg->phy.dev, "HSUSB_3p3");
-		if (IS_ERR(hsusb_3p3)) {
+		motg->v3p3 = regulator_get(motg->phy.dev, "HSUSB_3p3");
+		if (IS_ERR(motg->v3p3)) {
 			dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
-			return PTR_ERR(hsusb_3p3);
+			return PTR_ERR(motg->v3p3);
 		}
 
-		rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN,
+		rc = regulator_set_voltage(motg->v3p3, USB_PHY_3P3_VOL_MIN,
 				USB_PHY_3P3_VOL_MAX);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to set voltage level "
 					"for hsusb 3p3\n");
 			goto put_3p3;
 		}
-		rc = regulator_enable(hsusb_3p3);
+		rc = regulator_enable(motg->v3p3);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to enable the hsusb 3p3\n");
 			goto put_3p3;
 		}
-		hsusb_1p8 = regulator_get(motg->phy.dev, "HSUSB_1p8");
-		if (IS_ERR(hsusb_1p8)) {
+		motg->v1p8 = regulator_get(motg->phy.dev, "HSUSB_1p8");
+		if (IS_ERR(motg->v1p8)) {
 			dev_err(motg->phy.dev, "unable to get hsusb 1p8\n");
-			rc = PTR_ERR(hsusb_1p8);
+			rc = PTR_ERR(motg->v1p8);
 			goto disable_3p3;
 		}
-		rc = regulator_set_voltage(hsusb_1p8, USB_PHY_1P8_VOL_MIN,
+		rc = regulator_set_voltage(motg->v1p8, USB_PHY_1P8_VOL_MIN,
 				USB_PHY_1P8_VOL_MAX);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to set voltage level "
 					"for hsusb 1p8\n");
 			goto put_1p8;
 		}
-		rc = regulator_enable(hsusb_1p8);
+		rc = regulator_enable(motg->v1p8);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to enable the hsusb 1p8\n");
 			goto put_1p8;
@@ -149,19 +145,19 @@ static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
 		return 0;
 	}
 
-	regulator_disable(hsusb_1p8);
+	regulator_disable(motg->v1p8);
 put_1p8:
-	regulator_put(hsusb_1p8);
+	regulator_put(motg->v1p8);
 disable_3p3:
-	regulator_disable(hsusb_3p3);
+	regulator_disable(motg->v3p3);
 put_3p3:
-	regulator_put(hsusb_3p3);
+	regulator_put(motg->v3p3);
 	return rc;
 }
 
 #ifdef CONFIG_PM_SLEEP
 #define USB_PHY_SUSP_DIG_VOL  500000
-static int msm_hsusb_config_vddcx(int high)
+static int msm_hsusb_config_vddcx(struct msm_otg *motg, int high)
 {
 	int max_vol = USB_PHY_VDD_DIG_VOL_MAX;
 	int min_vol;
@@ -172,7 +168,7 @@ static int msm_hsusb_config_vddcx(int high)
 	else
 		min_vol = USB_PHY_SUSP_DIG_VOL;
 
-	ret = regulator_set_voltage(hsusb_vddcx, min_vol, max_vol);
+	ret = regulator_set_voltage(motg->vddcx, min_vol, max_vol);
 	if (ret) {
 		pr_err("%s: unable to set the voltage for regulator "
 			"HSUSB_VDDCX\n", __func__);
@@ -185,44 +181,44 @@ static int msm_hsusb_config_vddcx(int high)
 }
 #endif
 
-static int msm_hsusb_ldo_set_mode(int on)
+static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, int on)
 {
 	int ret = 0;
 
-	if (!hsusb_1p8 || IS_ERR(hsusb_1p8)) {
+	if (!motg->v1p8 || IS_ERR(motg->v1p8)) {
 		pr_err("%s: HSUSB_1p8 is not initialized\n", __func__);
 		return -ENODEV;
 	}
 
-	if (!hsusb_3p3 || IS_ERR(hsusb_3p3)) {
+	if (!motg->v3p3 || IS_ERR(motg->v3p3)) {
 		pr_err("%s: HSUSB_3p3 is not initialized\n", __func__);
 		return -ENODEV;
 	}
 
 	if (on) {
-		ret = regulator_set_optimum_mode(hsusb_1p8,
+		ret = regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_HPM_LOAD);
 		if (ret < 0) {
 			pr_err("%s: Unable to set HPM of the regulator "
 				"HSUSB_1p8\n", __func__);
 			return ret;
 		}
-		ret = regulator_set_optimum_mode(hsusb_3p3,
+		ret = regulator_set_optimum_mode(motg->v3p3,
 				USB_PHY_3P3_HPM_LOAD);
 		if (ret < 0) {
 			pr_err("%s: Unable to set HPM of the regulator "
 				"HSUSB_3p3\n", __func__);
-			regulator_set_optimum_mode(hsusb_1p8,
+			regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_LPM_LOAD);
 			return ret;
 		}
 	} else {
-		ret = regulator_set_optimum_mode(hsusb_1p8,
+		ret = regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_LPM_LOAD);
 		if (ret < 0)
 			pr_err("%s: Unable to set LPM of the regulator "
 				"HSUSB_1p8\n", __func__);
-		ret = regulator_set_optimum_mode(hsusb_3p3,
+		ret = regulator_set_optimum_mode(motg->v3p3,
 				USB_PHY_3P3_LPM_LOAD);
 		if (ret < 0)
 			pr_err("%s: Unable to set LPM of the regulator "
@@ -519,8 +515,8 @@ static int msm_otg_suspend(struct msm_otg *motg)
 
 	if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
 			motg->pdata->otg_control == OTG_PMIC_CONTROL) {
-		msm_hsusb_ldo_set_mode(0);
-		msm_hsusb_config_vddcx(0);
+		msm_hsusb_ldo_set_mode(motg, 0);
+		msm_hsusb_config_vddcx(motg, 0);
 	}
 
 	if (device_may_wakeup(phy->dev))
@@ -556,8 +552,8 @@ static int msm_otg_resume(struct msm_otg *motg)
 
 	if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
 			motg->pdata->otg_control == OTG_PMIC_CONTROL) {
-		msm_hsusb_ldo_set_mode(1);
-		msm_hsusb_config_vddcx(1);
+		msm_hsusb_ldo_set_mode(motg, 1);
+		msm_hsusb_config_vddcx(motg, 1);
 		writel(readl(USB_PHY_CTRL) & ~PHY_RETEN, USB_PHY_CTRL);
 	}
 
@@ -1520,7 +1516,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
 		goto vddcx_exit;
 	}
-	ret = msm_hsusb_ldo_set_mode(1);
+	ret = msm_hsusb_ldo_set_mode(motg, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "hsusb vreg enable failed\n");
 		goto ldo_exit;
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index 3275483..8705b01 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -183,6 +183,9 @@ struct msm_otg {
 	enum usb_chg_state chg_state;
 	enum usb_chg_type chg_type;
 	u8 dcd_retries;
+	struct regulator *v3p3;
+	struct regulator *v1p8;
+	struct regulator *vddcx;
 };
 
 #endif
-- 
1.7.9.5

[PATCH v4 03/15] usb: phy: msm: Migrate to Managed Device Resource allocation

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Move memory, regulators, clocks and irq allocation to
devm_* variants. Properly check for valid clk handles.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |  192 ++++++++++++++++-------------------------
 1 file changed, 74 insertions(+), 118 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index c22cbd8..dac2b22 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -63,27 +63,18 @@ static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 	int ret = 0;
 
 	if (init) {
-		motg->vddcx = regulator_get(motg->phy.dev, "HSUSB_VDDCX");
-		if (IS_ERR(motg->vddcx)) {
-			dev_err(motg->phy.dev, "unable to get hsusb vddcx\n");
-			return PTR_ERR(motg->vddcx);
-		}
-
 		ret = regulator_set_voltage(motg->vddcx,
 				USB_PHY_VDD_DIG_VOL_MIN,
 				USB_PHY_VDD_DIG_VOL_MAX);
 		if (ret) {
 			dev_err(motg->phy.dev, "unable to set the voltage "
 					"for hsusb vddcx\n");
-			regulator_put(motg->vddcx);
 			return ret;
 		}
 
 		ret = regulator_enable(motg->vddcx);
-		if (ret) {
+		if (ret)
 			dev_err(motg->phy.dev, "unable to enable hsusb vddcx\n");
-			regulator_put(motg->vddcx);
-		}
 	} else {
 		ret = regulator_set_voltage(motg->vddcx, 0,
 			USB_PHY_VDD_DIG_VOL_MAX);
@@ -93,8 +84,6 @@ static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 		ret = regulator_disable(motg->vddcx);
 		if (ret)
 			dev_err(motg->phy.dev, "unable to disable hsusb vddcx\n");
-
-		regulator_put(motg->vddcx);
 	}
 
 	return ret;
@@ -105,53 +94,38 @@ static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
 	int rc = 0;
 
 	if (init) {
-		motg->v3p3 = regulator_get(motg->phy.dev, "HSUSB_3p3");
-		if (IS_ERR(motg->v3p3)) {
-			dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
-			return PTR_ERR(motg->v3p3);
-		}
-
 		rc = regulator_set_voltage(motg->v3p3, USB_PHY_3P3_VOL_MIN,
 				USB_PHY_3P3_VOL_MAX);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to set voltage level "
 					"for hsusb 3p3\n");
-			goto put_3p3;
+			goto exit;
 		}
 		rc = regulator_enable(motg->v3p3);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to enable the hsusb 3p3\n");
-			goto put_3p3;
-		}
-		motg->v1p8 = regulator_get(motg->phy.dev, "HSUSB_1p8");
-		if (IS_ERR(motg->v1p8)) {
-			dev_err(motg->phy.dev, "unable to get hsusb 1p8\n");
-			rc = PTR_ERR(motg->v1p8);
-			goto disable_3p3;
+			goto exit;
 		}
 		rc = regulator_set_voltage(motg->v1p8, USB_PHY_1P8_VOL_MIN,
 				USB_PHY_1P8_VOL_MAX);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to set voltage level "
 					"for hsusb 1p8\n");
-			goto put_1p8;
+			goto disable_3p3;
 		}
 		rc = regulator_enable(motg->v1p8);
 		if (rc) {
 			dev_err(motg->phy.dev, "unable to enable the hsusb 1p8\n");
-			goto put_1p8;
+			goto disable_3p3;
 		}
 
 		return 0;
 	}
 
 	regulator_disable(motg->v1p8);
-put_1p8:
-	regulator_put(motg->v1p8);
 disable_3p3:
 	regulator_disable(motg->v3p3);
-put_3p3:
-	regulator_put(motg->v3p3);
+exit:
 	return rc;
 }
 
@@ -507,7 +481,7 @@ static int msm_otg_suspend(struct msm_otg *motg)
 
 	clk_disable_unprepare(motg->pclk);
 	clk_disable_unprepare(motg->clk);
-	if (motg->core_clk)
+	if (!IS_ERR(motg->core_clk))
 		clk_disable_unprepare(motg->core_clk);
 
 	if (!IS_ERR(motg->pclk_src))
@@ -547,7 +521,7 @@ static int msm_otg_resume(struct msm_otg *motg)
 
 	clk_prepare_enable(motg->pclk);
 	clk_prepare_enable(motg->clk);
-	if (motg->core_clk)
+	if (!IS_ERR(motg->core_clk))
 		clk_prepare_enable(motg->core_clk);
 
 	if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
@@ -1415,13 +1389,14 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL);
+	motg = devm_kzalloc(&pdev->dev, sizeof(struct msm_otg), GFP_KERNEL);
 	if (!motg) {
 		dev_err(&pdev->dev, "unable to allocate msm_otg\n");
 		return -ENOMEM;
 	}
 
-	motg->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
+	motg->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
+				     GFP_KERNEL);
 	if (!motg->phy.otg) {
 		dev_err(&pdev->dev, "unable to allocate msm_otg\n");
 		return -ENOMEM;
@@ -1431,20 +1406,17 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	phy = &motg->phy;
 	phy->dev = &pdev->dev;
 
-	motg->phy_reset_clk = clk_get(&pdev->dev, "usb_phy_clk");
+	motg->phy_reset_clk = devm_clk_get(&pdev->dev, "usb_phy_clk");
 	if (IS_ERR(motg->phy_reset_clk)) {
 		dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
-		ret = PTR_ERR(motg->phy_reset_clk);
-		goto free_motg;
+		return PTR_ERR(motg->phy_reset_clk);
 	}
 
-	motg->clk = clk_get(&pdev->dev, "usb_hs_clk");
+	motg->clk = devm_clk_get(&pdev->dev, "usb_hs_clk");
 	if (IS_ERR(motg->clk)) {
 		dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
-		ret = PTR_ERR(motg->clk);
-		goto put_phy_reset_clk;
+		return PTR_ERR(motg->clk);
 	}
-	clk_set_rate(motg->clk, 60000000);
 
 	/*
 	 * If USB Core is running its protocol engine based on CORE CLK,
@@ -1453,22 +1425,18 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	 * CORE CLK. For such USB cores, vote for maximum clk frequency
 	 * on pclk source
 	 */
+	 motg->pclk_src = ERR_PTR(-ENOENT);
 	 if (motg->pdata->pclk_src_name) {
-		motg->pclk_src = clk_get(&pdev->dev,
-			motg->pdata->pclk_src_name);
+		motg->pclk_src = devm_clk_get(&pdev->dev,
+					motg->pdata->pclk_src_name);
 		if (IS_ERR(motg->pclk_src))
-			goto put_clk;
-		clk_set_rate(motg->pclk_src, INT_MAX);
-		clk_prepare_enable(motg->pclk_src);
-	} else
-		motg->pclk_src = ERR_PTR(-ENOENT);
-
+			return PTR_ERR(motg->pclk_src);
+	}
 
-	motg->pclk = clk_get(&pdev->dev, "usb_hs_pclk");
+	motg->pclk = devm_clk_get(&pdev->dev, "usb_hs_pclk");
 	if (IS_ERR(motg->pclk)) {
 		dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
-		ret = PTR_ERR(motg->pclk);
-		goto put_pclk_src;
+		return PTR_ERR(motg->pclk);
 	}
 
 	/*
@@ -1476,65 +1444,78 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	 * clock is introduced to remove the dependency on AXI
 	 * bus frequency.
 	 */
-	motg->core_clk = clk_get(&pdev->dev, "usb_hs_core_clk");
-	if (IS_ERR(motg->core_clk))
-		motg->core_clk = NULL;
+	motg->core_clk = devm_clk_get(&pdev->dev, "usb_hs_core_clk");
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "failed to get platform resource mem\n");
-		ret = -ENODEV;
-		goto put_core_clk;
-	}
+	motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (IS_ERR(motg->regs))
+		return PTR_ERR(motg->regs);
 
-	motg->regs = ioremap(res->start, resource_size(res));
-	if (!motg->regs) {
-		dev_err(&pdev->dev, "ioremap failed\n");
-		ret = -ENOMEM;
-		goto put_core_clk;
-	}
 	dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
 
 	motg->irq = platform_get_irq(pdev, 0);
 	if (!motg->irq) {
 		dev_err(&pdev->dev, "platform_get_irq failed\n");
-		ret = -ENODEV;
-		goto free_regs;
+		return motg->irq;
+	}
+
+	motg->vddcx = devm_regulator_get(motg->phy.dev, "HSUSB_VDDCX");
+	if (IS_ERR(motg->vddcx)) {
+		dev_err(motg->phy.dev, "unable to get hsusb vddcx\n");
+		return PTR_ERR(motg->vddcx);
+	}
+
+	motg->v3p3 = devm_regulator_get(motg->phy.dev, "HSUSB_3p3");
+	if (IS_ERR(motg->v3p3)) {
+		dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
+		return PTR_ERR(motg->v3p3);
+	}
+
+	motg->v1p8 = devm_regulator_get(motg->phy.dev, "HSUSB_1p8");
+	if (IS_ERR(motg->v1p8)) {
+		dev_err(motg->phy.dev, "unable to get hsusb 1p8\n");
+		return PTR_ERR(motg->v1p8);
+	}
+
+	clk_set_rate(motg->clk, 60000000);
+	if (!IS_ERR(motg->pclk_src)) {
+		clk_set_rate(motg->pclk_src, INT_MAX);
+		clk_prepare_enable(motg->pclk_src);
 	}
 
 	clk_prepare_enable(motg->clk);
 	clk_prepare_enable(motg->pclk);
 
+	if (!IS_ERR(motg->core_clk))
+		clk_prepare_enable(motg->core_clk);
+
 	ret = msm_hsusb_init_vddcx(motg, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
-		goto free_regs;
+		goto disable_clks;
 	}
 
 	ret = msm_hsusb_ldo_init(motg, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
-		goto vddcx_exit;
+		goto disable_vddcx;
 	}
 	ret = msm_hsusb_ldo_set_mode(motg, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "hsusb vreg enable failed\n");
-		goto ldo_exit;
+		goto disable_ldo;
 	}
 
-	if (motg->core_clk)
-		clk_prepare_enable(motg->core_clk);
-
 	writel(0, USB_USBINTR);
 	writel(0, USB_OTGSC);
 
 	INIT_WORK(&motg->sm_work, msm_otg_sm_work);
 	INIT_DELAYED_WORK(&motg->chg_work, msm_chg_detect_work);
-	ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED,
+	ret = devm_request_irq(&pdev->dev, motg->irq, msm_otg_irq, IRQF_SHARED,
 					"msm_otg", motg);
 	if (ret) {
 		dev_err(&pdev->dev, "request irq failed\n");
-		goto disable_clks;
+		goto disable_ldo;
 	}
 
 	phy->init = msm_otg_reset;
@@ -1549,7 +1530,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	ret = usb_add_phy(&motg->phy, USB_PHY_TYPE_USB2);
 	if (ret) {
 		dev_err(&pdev->dev, "usb_add_phy failed\n");
-		goto free_irq;
+		goto disable_ldo;
 	}
 
 	platform_set_drvdata(pdev, motg);
@@ -1567,33 +1548,18 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 
 	return 0;
-free_irq:
-	free_irq(motg->irq, motg);
+
+disable_ldo:
+	msm_hsusb_ldo_init(motg, 0);
+disable_vddcx:
+	msm_hsusb_init_vddcx(motg, 0);
 disable_clks:
 	clk_disable_unprepare(motg->pclk);
 	clk_disable_unprepare(motg->clk);
-ldo_exit:
-	msm_hsusb_ldo_init(motg, 0);
-vddcx_exit:
-	msm_hsusb_init_vddcx(motg, 0);
-free_regs:
-	iounmap(motg->regs);
-put_core_clk:
-	if (motg->core_clk)
-		clk_put(motg->core_clk);
-	clk_put(motg->pclk);
-put_pclk_src:
-	if (!IS_ERR(motg->pclk_src)) {
+	if (!IS_ERR(motg->core_clk))
+		clk_disable_unprepare(motg->core_clk);
+	if (!IS_ERR(motg->pclk_src))
 		clk_disable_unprepare(motg->pclk_src);
-		clk_put(motg->pclk_src);
-	}
-put_clk:
-	clk_put(motg->clk);
-put_phy_reset_clk:
-	clk_put(motg->phy_reset_clk);
-free_motg:
-	kfree(motg->phy.otg);
-	kfree(motg);
 	return ret;
 }
 
@@ -1616,7 +1582,7 @@ static int msm_otg_remove(struct platform_device *pdev)
 	pm_runtime_disable(&pdev->dev);
 
 	usb_remove_phy(phy);
-	free_irq(motg->irq, motg);
+	disable_irq(motg->irq);
 
 	/*
 	 * Put PHY in low power mode.
@@ -1636,26 +1602,15 @@ static int msm_otg_remove(struct platform_device *pdev)
 
 	clk_disable_unprepare(motg->pclk);
 	clk_disable_unprepare(motg->clk);
-	if (motg->core_clk)
+	if (!IS_ERR(motg->core_clk))
 		clk_disable_unprepare(motg->core_clk);
-	if (!IS_ERR(motg->pclk_src)) {
+	if (!IS_ERR(motg->pclk_src))
 		clk_disable_unprepare(motg->pclk_src);
-		clk_put(motg->pclk_src);
-	}
+
 	msm_hsusb_ldo_init(motg, 0);
 
-	iounmap(motg->regs);
 	pm_runtime_set_suspended(&pdev->dev);
 
-	clk_put(motg->phy_reset_clk);
-	clk_put(motg->pclk);
-	clk_put(motg->clk);
-	if (motg->core_clk)
-		clk_put(motg->core_clk);
-
-	kfree(motg->phy.otg);
-	kfree(motg);
-
 	return 0;
 }
 
@@ -1737,6 +1692,7 @@ static const struct dev_pm_ops msm_otg_dev_pm_ops = {
 #endif
 
 static struct platform_driver msm_otg_driver = {
+	.probe = msm_otg_probe,
 	.remove = msm_otg_remove,
 	.driver = {
 		.name = DRIVER_NAME,
@@ -1747,7 +1703,7 @@ static struct platform_driver msm_otg_driver = {
 	},
 };
 
-module_platform_driver_probe(msm_otg_driver, msm_otg_probe);
+module_platform_driver(msm_otg_driver);
 
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("MSM USB transceiver driver");
-- 
1.7.9.5

[PATCH v4 04/15] usb: phy: msm: Remove unnecessarily check for valid regulators.

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Whether regulators are available or not is checked at driver
probe. If they are not available driver will refuse to load,
so no need to check them again.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |   10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index dac2b22..0bd9614 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -159,16 +159,6 @@ static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, int on)
 {
 	int ret = 0;
 
-	if (!motg->v1p8 || IS_ERR(motg->v1p8)) {
-		pr_err("%s: HSUSB_1p8 is not initialized\n", __func__);
-		return -ENODEV;
-	}
-
-	if (!motg->v3p3 || IS_ERR(motg->v3p3)) {
-		pr_err("%s: HSUSB_3p3 is not initialized\n", __func__);
-		return -ENODEV;
-	}
-
 	if (on) {
 		ret = regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_HPM_LOAD);
-- 
1.7.9.5

[PATCH v4 05/15] usb: phy: msm: Fix checkpatch.pl warnings

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

This fixes following:

WARNING: quoted string split across lines
WARNING: Prefer seq_puts to seq_printf

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |   39 ++++++++++++++-------------------------
 1 file changed, 14 insertions(+), 25 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 0bd9614..8f148a6 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -67,8 +67,7 @@ static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 				USB_PHY_VDD_DIG_VOL_MIN,
 				USB_PHY_VDD_DIG_VOL_MAX);
 		if (ret) {
-			dev_err(motg->phy.dev, "unable to set the voltage "
-					"for hsusb vddcx\n");
+			dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
 			return ret;
 		}
 
@@ -79,8 +78,7 @@ static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 		ret = regulator_set_voltage(motg->vddcx, 0,
 			USB_PHY_VDD_DIG_VOL_MAX);
 		if (ret)
-			dev_err(motg->phy.dev, "unable to set the voltage "
-					"for hsusb vddcx\n");
+			dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
 		ret = regulator_disable(motg->vddcx);
 		if (ret)
 			dev_err(motg->phy.dev, "unable to disable hsusb vddcx\n");
@@ -97,8 +95,7 @@ static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
 		rc = regulator_set_voltage(motg->v3p3, USB_PHY_3P3_VOL_MIN,
 				USB_PHY_3P3_VOL_MAX);
 		if (rc) {
-			dev_err(motg->phy.dev, "unable to set voltage level "
-					"for hsusb 3p3\n");
+			dev_err(motg->phy.dev, "Cannot set v3p3 voltage\n");
 			goto exit;
 		}
 		rc = regulator_enable(motg->v3p3);
@@ -109,8 +106,7 @@ static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
 		rc = regulator_set_voltage(motg->v1p8, USB_PHY_1P8_VOL_MIN,
 				USB_PHY_1P8_VOL_MAX);
 		if (rc) {
-			dev_err(motg->phy.dev, "unable to set voltage level "
-					"for hsusb 1p8\n");
+			dev_err(motg->phy.dev, "Cannot set v1p8 voltage\n");
 			goto disable_3p3;
 		}
 		rc = regulator_enable(motg->v1p8);
@@ -144,8 +140,7 @@ static int msm_hsusb_config_vddcx(struct msm_otg *motg, int high)
 
 	ret = regulator_set_voltage(motg->vddcx, min_vol, max_vol);
 	if (ret) {
-		pr_err("%s: unable to set the voltage for regulator "
-			"HSUSB_VDDCX\n", __func__);
+		dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
 		return ret;
 	}
 
@@ -163,15 +158,13 @@ static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, int on)
 		ret = regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_HPM_LOAD);
 		if (ret < 0) {
-			pr_err("%s: Unable to set HPM of the regulator "
-				"HSUSB_1p8\n", __func__);
+			pr_err("Could not set HPM for v1p8\n");
 			return ret;
 		}
 		ret = regulator_set_optimum_mode(motg->v3p3,
 				USB_PHY_3P3_HPM_LOAD);
 		if (ret < 0) {
-			pr_err("%s: Unable to set HPM of the regulator "
-				"HSUSB_3p3\n", __func__);
+			pr_err("Could not set HPM for v3p3\n");
 			regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_LPM_LOAD);
 			return ret;
@@ -180,13 +173,11 @@ static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, int on)
 		ret = regulator_set_optimum_mode(motg->v1p8,
 				USB_PHY_1P8_LPM_LOAD);
 		if (ret < 0)
-			pr_err("%s: Unable to set LPM of the regulator "
-				"HSUSB_1p8\n", __func__);
+			pr_err("Could not set LPM for v1p8\n");
 		ret = regulator_set_optimum_mode(motg->v3p3,
 				USB_PHY_3P3_LPM_LOAD);
 		if (ret < 0)
-			pr_err("%s: Unable to set LPM of the regulator "
-				"HSUSB_3p3\n", __func__);
+			pr_err("Could not set LPM for v3p3\n");
 	}
 
 	pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
@@ -547,8 +538,7 @@ static int msm_otg_resume(struct msm_otg *motg)
 		 * PHY. USB state can not be restored. Re-insertion
 		 * of USB cable is the only way to get USB working.
 		 */
-		dev_err(phy->dev, "Unable to resume USB."
-				"Re-plugin the cable\n");
+		dev_err(phy->dev, "Unable to resume USB. Re-plugin the cable\n");
 		msm_otg_reset(phy);
 	}
 
@@ -1242,13 +1232,13 @@ static int msm_otg_mode_show(struct seq_file *s, void *unused)
 
 	switch (otg->phy->state) {
 	case OTG_STATE_A_HOST:
-		seq_printf(s, "host\n");
+		seq_puts(s, "host\n");
 		break;
 	case OTG_STATE_B_PERIPHERAL:
-		seq_printf(s, "peripheral\n");
+		seq_puts(s, "peripheral\n");
 		break;
 	default:
-		seq_printf(s, "none\n");
+		seq_puts(s, "none\n");
 		break;
 	}
 
@@ -1530,8 +1520,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 			motg->pdata->otg_control == OTG_USER_CONTROL) {
 		ret = msm_otg_debugfs_init(motg);
 		if (ret)
-			dev_dbg(&pdev->dev, "mode debugfs file is"
-					"not available\n");
+			dev_dbg(&pdev->dev, "Can not create mode change file\n");
 	}
 
 	pm_runtime_set_active(&pdev->dev);
-- 
1.7.9.5

[PATCH v4 06/15] usb: phy: msm: Replace custom enum usb_mode_type with enum usb_dr_mode

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Use enum usb_dr_mode and drop default usb_dr_mode from platform data.

USB DT bindings states: dr_mode: "...In case this attribute isn't
passed via DT, USB DRD controllers should default to OTG...",
so remove redundand field.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 arch/arm/mach-msm/board-msm7x30.c |    2 +-
 arch/arm/mach-msm/board-qsd8x50.c |    2 +-
 drivers/usb/phy/phy-msm-usb.c     |   41 +++++++++++++++----------------------
 include/linux/usb/msm_hsusb.h     |   20 +-----------------
 4 files changed, 20 insertions(+), 45 deletions(-)

diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
index 46de789..0c4c200 100644
--- a/arch/arm/mach-msm/board-msm7x30.c
+++ b/arch/arm/mach-msm/board-msm7x30.c
@@ -95,7 +95,7 @@ static int hsusb_phy_clk_reset(struct clk *phy_clk)
 
 static struct msm_otg_platform_data msm_otg_pdata = {
 	.phy_init_seq		= hsusb_phy_init_seq,
-	.mode                   = USB_PERIPHERAL,
+	.mode                   = USB_DR_MODE_PERIPHERAL,
 	.otg_control		= OTG_PHY_CONTROL,
 	.link_clk_reset		= hsusb_link_clk_reset,
 	.phy_clk_reset		= hsusb_phy_clk_reset,
diff --git a/arch/arm/mach-msm/board-qsd8x50.c b/arch/arm/mach-msm/board-qsd8x50.c
index 9169ec3..4c74861 100644
--- a/arch/arm/mach-msm/board-qsd8x50.c
+++ b/arch/arm/mach-msm/board-qsd8x50.c
@@ -116,7 +116,7 @@ static int hsusb_phy_clk_reset(struct clk *phy_clk)
 
 static struct msm_otg_platform_data msm_otg_pdata = {
 	.phy_init_seq		= hsusb_phy_init_seq,
-	.mode                   = USB_PERIPHERAL,
+	.mode                   = USB_DR_MODE_PERIPHERAL,
 	.otg_control		= OTG_PHY_CONTROL,
 	.link_clk_reset		= hsusb_link_clk_reset,
 	.phy_clk_reset		= hsusb_phy_clk_reset,
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 8f148a6..00ee7b3 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -373,10 +373,10 @@ static int msm_otg_reset(struct usb_phy *phy)
 
 	if (pdata->otg_control == OTG_PHY_CONTROL) {
 		val = readl(USB_OTGSC);
-		if (pdata->mode == USB_OTG) {
+		if (pdata->mode == USB_DR_MODE_OTG) {
 			ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID;
 			val |= OTGSC_IDIE | OTGSC_BSVIE;
-		} else if (pdata->mode == USB_PERIPHERAL) {
+		} else if (pdata->mode == USB_DR_MODE_PERIPHERAL) {
 			ulpi_val = ULPI_INT_SESS_VALID;
 			val |= OTGSC_BSVIE;
 		}
@@ -637,7 +637,7 @@ static int msm_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
 	 * Fail host registration if this board can support
 	 * only peripheral configuration.
 	 */
-	if (motg->pdata->mode == USB_PERIPHERAL) {
+	if (motg->pdata->mode == USB_DR_MODE_PERIPHERAL) {
 		dev_info(otg->phy->dev, "Host mode is not supported\n");
 		return -ENODEV;
 	}
@@ -666,7 +666,7 @@ static int msm_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
 	 * Kick the state machine work, if peripheral is not supported
 	 * or peripheral is already registered with us.
 	 */
-	if (motg->pdata->mode == USB_HOST || otg->gadget) {
+	if (motg->pdata->mode == USB_DR_MODE_HOST || otg->gadget) {
 		pm_runtime_get_sync(otg->phy->dev);
 		schedule_work(&motg->sm_work);
 	}
@@ -710,7 +710,7 @@ static int msm_otg_set_peripheral(struct usb_otg *otg,
 	 * Fail peripheral registration if this board can support
 	 * only host configuration.
 	 */
-	if (motg->pdata->mode == USB_HOST) {
+	if (motg->pdata->mode == USB_DR_MODE_HOST) {
 		dev_info(otg->phy->dev, "Peripheral mode is not supported\n");
 		return -ENODEV;
 	}
@@ -735,7 +735,7 @@ static int msm_otg_set_peripheral(struct usb_otg *otg,
 	 * Kick the state machine work, if host is not supported
 	 * or host is already registered with us.
 	 */
-	if (motg->pdata->mode == USB_PERIPHERAL || otg->host) {
+	if (motg->pdata->mode == USB_DR_MODE_PERIPHERAL || otg->host) {
 		pm_runtime_get_sync(otg->phy->dev);
 		schedule_work(&motg->sm_work);
 	}
@@ -1056,7 +1056,7 @@ static void msm_otg_init_sm(struct msm_otg *motg)
 	u32 otgsc = readl(USB_OTGSC);
 
 	switch (pdata->mode) {
-	case USB_OTG:
+	case USB_DR_MODE_OTG:
 		if (pdata->otg_control == OTG_PHY_CONTROL) {
 			if (otgsc & OTGSC_ID)
 				set_bit(ID, &motg->inputs);
@@ -1068,21 +1068,14 @@ static void msm_otg_init_sm(struct msm_otg *motg)
 			else
 				clear_bit(B_SESS_VLD, &motg->inputs);
 		} else if (pdata->otg_control == OTG_USER_CONTROL) {
-			if (pdata->default_mode == USB_HOST) {
-				clear_bit(ID, &motg->inputs);
-			} else if (pdata->default_mode == USB_PERIPHERAL) {
-				set_bit(ID, &motg->inputs);
-				set_bit(B_SESS_VLD, &motg->inputs);
-			} else {
 				set_bit(ID, &motg->inputs);
 				clear_bit(B_SESS_VLD, &motg->inputs);
-			}
 		}
 		break;
-	case USB_HOST:
+	case USB_DR_MODE_HOST:
 		clear_bit(ID, &motg->inputs);
 		break;
-	case USB_PERIPHERAL:
+	case USB_DR_MODE_PERIPHERAL:
 		set_bit(ID, &motg->inputs);
 		if (otgsc & OTGSC_BSV)
 			set_bit(B_SESS_VLD, &motg->inputs);
@@ -1258,7 +1251,7 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
 	char buf[16];
 	struct usb_otg *otg = motg->phy.otg;
 	int status = count;
-	enum usb_mode_type req_mode;
+	enum usb_dr_mode req_mode;
 
 	memset(buf, 0x00, sizeof(buf));
 
@@ -1268,18 +1261,18 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
 	}
 
 	if (!strncmp(buf, "host", 4)) {
-		req_mode = USB_HOST;
+		req_mode = USB_DR_MODE_HOST;
 	} else if (!strncmp(buf, "peripheral", 10)) {
-		req_mode = USB_PERIPHERAL;
+		req_mode = USB_DR_MODE_PERIPHERAL;
 	} else if (!strncmp(buf, "none", 4)) {
-		req_mode = USB_NONE;
+		req_mode = USB_DR_MODE_UNKNOWN;
 	} else {
 		status = -EINVAL;
 		goto out;
 	}
 
 	switch (req_mode) {
-	case USB_NONE:
+	case USB_DR_MODE_UNKNOWN:
 		switch (otg->phy->state) {
 		case OTG_STATE_A_HOST:
 		case OTG_STATE_B_PERIPHERAL:
@@ -1290,7 +1283,7 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
 			goto out;
 		}
 		break;
-	case USB_PERIPHERAL:
+	case USB_DR_MODE_PERIPHERAL:
 		switch (otg->phy->state) {
 		case OTG_STATE_B_IDLE:
 		case OTG_STATE_A_HOST:
@@ -1301,7 +1294,7 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
 			goto out;
 		}
 		break;
-	case USB_HOST:
+	case USB_DR_MODE_HOST:
 		switch (otg->phy->state) {
 		case OTG_STATE_B_IDLE:
 		case OTG_STATE_B_PERIPHERAL:
@@ -1516,7 +1509,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, motg);
 	device_init_wakeup(&pdev->dev, 1);
 
-	if (motg->pdata->mode == USB_OTG &&
+	if (motg->pdata->mode == USB_DR_MODE_OTG &&
 			motg->pdata->otg_control == OTG_USER_CONTROL) {
 		ret = msm_otg_debugfs_init(motg);
 		if (ret)
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index 8705b01..72c5830 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -23,21 +23,6 @@
 #include <linux/clk.h>
 
 /**
- * Supported USB modes
- *
- * USB_PERIPHERAL       Only peripheral mode is supported.
- * USB_HOST             Only host mode is supported.
- * USB_OTG              OTG mode is supported.
- *
- */
-enum usb_mode_type {
-	USB_NONE = 0,
-	USB_PERIPHERAL,
-	USB_HOST,
-	USB_OTG,
-};
-
-/**
  * OTG control
  *
  * OTG_NO_CONTROL	Id/VBUS notifications not required. Useful in host
@@ -121,8 +106,6 @@ enum usb_chg_type {
  * @power_budget: VBUS power budget in mA (0 will be treated as 500mA).
  * @mode: Supported mode (OTG/peripheral/host).
  * @otg_control: OTG switch controlled by user/Id pin
- * @default_mode: Default operational mode. Applicable only if
- *              OTG switch is controller by user.
  * @pclk_src_name: pclk is derived from ebi1_usb_clk in case of 7x27 and 8k
  *              dfab_usb_hs_clk in case of 8660 and 8960.
  */
@@ -130,9 +113,8 @@ struct msm_otg_platform_data {
 	int *phy_init_seq;
 	void (*vbus_power)(bool on);
 	unsigned power_budget;
-	enum usb_mode_type mode;
+	enum usb_dr_mode mode;
 	enum otg_control_type otg_control;
-	enum usb_mode_type default_mode;
 	enum msm_usb_phy_type phy_type;
 	void (*setup_gpio)(enum usb_otg_state state);
 	char *pclk_src_name;
-- 
1.7.9.5

[PATCH v4 07/15] usb: phy: msm: Remove unused pclk_src_name

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

There are no references to 'pclk_src_name' in plaform code,
so it is unused.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |   26 +-------------------------
 include/linux/usb/msm_hsusb.h |    5 -----
 2 files changed, 1 insertion(+), 30 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 00ee7b3..9e9d4a3 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -465,9 +465,6 @@ static int msm_otg_suspend(struct msm_otg *motg)
 	if (!IS_ERR(motg->core_clk))
 		clk_disable_unprepare(motg->core_clk);
 
-	if (!IS_ERR(motg->pclk_src))
-		clk_disable_unprepare(motg->pclk_src);
-
 	if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
 			motg->pdata->otg_control == OTG_PMIC_CONTROL) {
 		msm_hsusb_ldo_set_mode(motg, 0);
@@ -497,9 +494,6 @@ static int msm_otg_resume(struct msm_otg *motg)
 	if (!atomic_read(&motg->in_lpm))
 		return 0;
 
-	if (!IS_ERR(motg->pclk_src))
-		clk_prepare_enable(motg->pclk_src);
-
 	clk_prepare_enable(motg->pclk);
 	clk_prepare_enable(motg->clk);
 	if (!IS_ERR(motg->core_clk))
@@ -1395,17 +1389,8 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	 * If USB Core is running its protocol engine based on CORE CLK,
 	 * CORE CLK  must be running at >55Mhz for correct HSUSB
 	 * operation and USB core cannot tolerate frequency changes on
-	 * CORE CLK. For such USB cores, vote for maximum clk frequency
-	 * on pclk source
+	 * CORE CLK.
 	 */
-	 motg->pclk_src = ERR_PTR(-ENOENT);
-	 if (motg->pdata->pclk_src_name) {
-		motg->pclk_src = devm_clk_get(&pdev->dev,
-					motg->pdata->pclk_src_name);
-		if (IS_ERR(motg->pclk_src))
-			return PTR_ERR(motg->pclk_src);
-	}
-
 	motg->pclk = devm_clk_get(&pdev->dev, "usb_hs_pclk");
 	if (IS_ERR(motg->pclk)) {
 		dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
@@ -1451,10 +1436,6 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	}
 
 	clk_set_rate(motg->clk, 60000000);
-	if (!IS_ERR(motg->pclk_src)) {
-		clk_set_rate(motg->pclk_src, INT_MAX);
-		clk_prepare_enable(motg->pclk_src);
-	}
 
 	clk_prepare_enable(motg->clk);
 	clk_prepare_enable(motg->pclk);
@@ -1530,8 +1511,6 @@ disable_clks:
 	clk_disable_unprepare(motg->clk);
 	if (!IS_ERR(motg->core_clk))
 		clk_disable_unprepare(motg->core_clk);
-	if (!IS_ERR(motg->pclk_src))
-		clk_disable_unprepare(motg->pclk_src);
 	return ret;
 }
 
@@ -1576,9 +1555,6 @@ static int msm_otg_remove(struct platform_device *pdev)
 	clk_disable_unprepare(motg->clk);
 	if (!IS_ERR(motg->core_clk))
 		clk_disable_unprepare(motg->core_clk);
-	if (!IS_ERR(motg->pclk_src))
-		clk_disable_unprepare(motg->pclk_src);
-
 	msm_hsusb_ldo_init(motg, 0);
 
 	pm_runtime_set_suspended(&pdev->dev);
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index 72c5830..262ed80 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -106,8 +106,6 @@ enum usb_chg_type {
  * @power_budget: VBUS power budget in mA (0 will be treated as 500mA).
  * @mode: Supported mode (OTG/peripheral/host).
  * @otg_control: OTG switch controlled by user/Id pin
- * @pclk_src_name: pclk is derived from ebi1_usb_clk in case of 7x27 and 8k
- *              dfab_usb_hs_clk in case of 8660 and 8960.
  */
 struct msm_otg_platform_data {
 	int *phy_init_seq;
@@ -117,7 +115,6 @@ struct msm_otg_platform_data {
 	enum otg_control_type otg_control;
 	enum msm_usb_phy_type phy_type;
 	void (*setup_gpio)(enum usb_otg_state state);
-	char *pclk_src_name;
 	int (*link_clk_reset)(struct clk *link_clk, bool assert);
 	int (*phy_clk_reset)(struct clk *phy_clk);
 };
@@ -129,7 +126,6 @@ struct msm_otg_platform_data {
  * @irq: IRQ number assigned for HSUSB controller.
  * @clk: clock struct of usb_hs_clk.
  * @pclk: clock struct of usb_hs_pclk.
- * @pclk_src: pclk source for voting.
  * @phy_reset_clk: clock struct of usb_phy_clk.
  * @core_clk: clock struct of usb_hs_core_clk.
  * @regs: ioremapped register base address.
@@ -150,7 +146,6 @@ struct msm_otg {
 	int irq;
 	struct clk *clk;
 	struct clk *pclk;
-	struct clk *pclk_src;
 	struct clk *phy_reset_clk;
 	struct clk *core_clk;
 	void __iomem *regs;
-- 
1.7.9.5

[PATCH v4 08/15] usb: phy: msm: Remove HSUSB prefix from regulator names

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Prefix did not bring any useful information. Currently none
of the MSM platforms define these regulators, so it is safe
to rename them.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
---
 drivers/usb/phy/phy-msm-usb.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 9e9d4a3..258bca2 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -1417,19 +1417,19 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 		return motg->irq;
 	}
 
-	motg->vddcx = devm_regulator_get(motg->phy.dev, "HSUSB_VDDCX");
+	motg->vddcx = devm_regulator_get(motg->phy.dev, "vddcx");
 	if (IS_ERR(motg->vddcx)) {
 		dev_err(motg->phy.dev, "unable to get hsusb vddcx\n");
 		return PTR_ERR(motg->vddcx);
 	}
 
-	motg->v3p3 = devm_regulator_get(motg->phy.dev, "HSUSB_3p3");
+	motg->v3p3 = devm_regulator_get(motg->phy.dev, "v3p3");
 	if (IS_ERR(motg->v3p3)) {
 		dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
 		return PTR_ERR(motg->v3p3);
 	}
 
-	motg->v1p8 = devm_regulator_get(motg->phy.dev, "HSUSB_1p8");
+	motg->v1p8 = devm_regulator_get(motg->phy.dev, "v1p8");
 	if (IS_ERR(motg->v1p8)) {
 		dev_err(motg->phy.dev, "unable to get hsusb 1p8\n");
 		return PTR_ERR(motg->v1p8);
-- 
1.7.9.5

[PATCH v4 09/15] usb: phy: msm: Properly check result from platform_get_irq()

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>

Function return negative code on error.

Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
---
 drivers/usb/phy/phy-msm-usb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 258bca2..fa8e672d 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -1412,7 +1412,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
 
 	motg->irq = platform_get_irq(pdev, 0);
-	if (!motg->irq) {
+	if (motg->irq < 0) {
 		dev_err(&pdev->dev, "platform_get_irq failed\n");
 		return motg->irq;
 	}
-- 
1.7.9.5

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[PATCH v4 10/15] usb: phy: msm: Add device tree support and binding information

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Allows MSM OTG controller to be specified via device tree.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Cc: devicetree@vger.kernel.org
---
 .../devicetree/bindings/usb/msm-hsusb.txt          |   57 +++++++++++++-
 drivers/usb/phy/phy-msm-usb.c                      |   79 +++++++++++++++++---
 2 files changed, 124 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index 0a85eba..f1045e3 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -30,4 +30,59 @@ Required properties:
 		dr_mode = "peripheral";
 		interrupts = <0 134 0>;
 		usb-phy = <&usb_otg>;
-	};
\ No newline at end of file
+	};
+
+USB PHY with optional OTG:
+
+Required properties:
+- compatible:	should contain "qcom,usb-otg-ci" for chipsets with
+				Chipidea 45nm PHY or "qcom,usb-otg-snps" for chipsets
+				with Synopsys 28nm PHY
+- regs:			offset and length of the register set in the memory map
+- interrupts:	interrupt-specifier for the OTG interrupt.
+
+- clocks:		A list of phandle + clock-specifier pairs for the
+				clocks listed in clock-names
+- clock-names:	Should contain the following:
+  "phy"			USB PHY reference clock
+  "core"		Protocol engine clock
+  "iface"		Interface bus clock
+  "alt_core"	Optional: Protocol engine clock for targets with asynchronous
+				reset methodology.
+
+- dr_mode:		One of "host", "peripheral" or "otg". Defaults to "otg"
+
+- vdccx-supply:	phandle to the regulator for the vdd supply for
+				digital circuit operation.
+- v1p8-supply:	phandle to the regulator for the 1.8V supply
+- v3p3-supply:	phandle to the regulator for the 3.3V supply
+
+- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
+				1 - PHY control
+				2 - PMIC control
+				3 - User control (via debugfs)
+
+Optional properties:
+- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
+				terminate with -1
+
+Example HSUSB OTG controller device node:
+
+	usb@f9a55000 {
+		compatible = "qcom,usb-otg-snps";
+		reg = <0xf9a55000 0x400>;
+		interrupts = <0 134 0>;;
+		dr_mode = "peripheral";
+
+		clocks = <&gcc GCC_XO_CLK>, <&gcc GCC_USB_HS_SYSTEM_CLK>,
+				<&gcc GCC_USB_HS_AHB_CLK>;
+
+		clock-names = "phy", "core", "iface";
+
+		vddcx-supply = <&pm8841_s2_corner>;
+		v1p8-supply = <&pm8941_l6>;
+		v3p3-supply = <&pm8941_l24>;
+
+		qcom,otg-control = <1>;
+		qcom,phy-init-sequence = <0x01 0x90 0xffffffff>;
+	};
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index fa8e672d..cc230c8 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -30,9 +30,12 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <linux/usb.h>
 #include <linux/usb/otg.h>
+#include <linux/usb/of.h>
 #include <linux/usb/ulpi.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/hcd.h>
@@ -1343,25 +1346,75 @@ static void msm_otg_debugfs_cleanup(void)
 	debugfs_remove(msm_otg_dbg_root);
 }
 
+static struct of_device_id msm_otg_dt_match[] = {
+	{
+		.compatible = "qcom,usb-otg-ci",
+		.data = (void *) CI_45NM_INTEGRATED_PHY
+	}, {
+		.compatible = "qcom,usb-otg-snps",
+		.data = (void *) SNPS_28NM_INTEGRATED_PHY
+	}, {}
+};
+
+static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
+{
+	struct msm_otg_platform_data *pdata;
+	const struct of_device_id *id;
+	struct device_node *node = pdev->dev.of_node;
+	int len = 0;
+	u32 val;
+
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	motg->pdata = pdata;
+
+	id = of_match_device(msm_otg_dt_match, &pdev->dev);
+	pdata->phy_type = (int) id->data;
+
+	pdata->mode = of_usb_get_dr_mode(node);
+	if (pdata->mode == USB_DR_MODE_UNKNOWN)
+		pdata->mode = USB_DR_MODE_OTG;
+
+	pdata->otg_control = OTG_PHY_CONTROL;
+	if (!of_property_read_u32(node, "qcom,otg-control", &val))
+		pdata->otg_control = val;
+
+	if (!of_get_property(node, "qcom,phy-init-sequence", &len) || !len)
+		return 0;
+
+	pdata->phy_init_seq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+	if (!pdata->phy_init_seq)
+		return 0;
+
+	of_property_read_u32_array(node, "qcom,phy-init-sequence",
+				   pdata->phy_init_seq,
+				   len / sizeof(*pdata->phy_init_seq));
+	return 0;
+}
+
 static int __init msm_otg_probe(struct platform_device *pdev)
 {
 	int ret = 0;
+	struct device_node *np = pdev->dev.of_node;
+	struct msm_otg_platform_data *pdata;
 	struct resource *res;
 	struct msm_otg *motg;
 	struct usb_phy *phy;
 
-	dev_info(&pdev->dev, "msm_otg probe\n");
-	if (!dev_get_platdata(&pdev->dev)) {
-		dev_err(&pdev->dev, "No platform data given. Bailing out\n");
-		return -ENODEV;
-	}
-
 	motg = devm_kzalloc(&pdev->dev, sizeof(struct msm_otg), GFP_KERNEL);
 	if (!motg) {
 		dev_err(&pdev->dev, "unable to allocate msm_otg\n");
 		return -ENOMEM;
 	}
 
+	pdata = dev_get_platdata(&pdev->dev);
+	if (!pdata)
+		ret = msm_otg_read_dt(pdev, motg);
+		if (ret)
+			return ret;
+
 	motg->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
 				     GFP_KERNEL);
 	if (!motg->phy.otg) {
@@ -1369,17 +1422,17 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	motg->pdata = dev_get_platdata(&pdev->dev);
 	phy = &motg->phy;
 	phy->dev = &pdev->dev;
 
-	motg->phy_reset_clk = devm_clk_get(&pdev->dev, "usb_phy_clk");
+	motg->phy_reset_clk = devm_clk_get(&pdev->dev,
+					   np ? "phy" : "usb_phy_clk");
 	if (IS_ERR(motg->phy_reset_clk)) {
 		dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
 		return PTR_ERR(motg->phy_reset_clk);
 	}
 
-	motg->clk = devm_clk_get(&pdev->dev, "usb_hs_clk");
+	motg->clk = devm_clk_get(&pdev->dev, np ? "core" : "usb_hs_clk");
 	if (IS_ERR(motg->clk)) {
 		dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
 		return PTR_ERR(motg->clk);
@@ -1391,7 +1444,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	 * operation and USB core cannot tolerate frequency changes on
 	 * CORE CLK.
 	 */
-	motg->pclk = devm_clk_get(&pdev->dev, "usb_hs_pclk");
+	motg->pclk = devm_clk_get(&pdev->dev, np ? "iface" : "usb_hs_pclk");
 	if (IS_ERR(motg->pclk)) {
 		dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
 		return PTR_ERR(motg->pclk);
@@ -1402,7 +1455,8 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	 * clock is introduced to remove the dependency on AXI
 	 * bus frequency.
 	 */
-	motg->core_clk = devm_clk_get(&pdev->dev, "usb_hs_core_clk");
+	motg->core_clk = devm_clk_get(&pdev->dev,
+				      np ? "alt_core" : "usb_hs_core_clk");
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
@@ -1639,6 +1693,8 @@ static const struct dev_pm_ops msm_otg_dev_pm_ops = {
 };
 #endif
 
+MODULE_DEVICE_TABLE(of, msm_otg_dt_match);
+
 static struct platform_driver msm_otg_driver = {
 	.probe = msm_otg_probe,
 	.remove = msm_otg_remove,
@@ -1648,6 +1704,7 @@ static struct platform_driver msm_otg_driver = {
 #ifdef CONFIG_PM
 		.pm = &msm_otg_dev_pm_ops,
 #endif
+		.of_match_table = msm_otg_dt_match,
 	},
 };
 
-- 
1.7.9.5

[PATCH v4 11/15] usb: phy: msm: Use reset framework for LINK and PHY resets

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Cc: devicetree@vger.kernel.org
---
 .../devicetree/bindings/usb/msm-hsusb.txt          |    9 ++++++
 drivers/usb/phy/phy-msm-usb.c                      |   30 ++++++++++++++------
 include/linux/usb/msm_hsusb.h                      |    3 ++
 3 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index f1045e3..3f21204 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -57,6 +57,12 @@ Required properties:
 - v1p8-supply:	phandle to the regulator for the 1.8V supply
 - v3p3-supply:	phandle to the regulator for the 3.3V supply
 
+- resets:		A list of phandle + reset-specifier pairs for the
+				resets listed in reset-names
+- reset-names:	Should contain the following:
+  "phy"			USB PHY controller reset
+  "link"		USB LINK controller reset
+
 - qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
 				1 - PHY control
 				2 - PMIC control
@@ -83,6 +89,9 @@ Example HSUSB OTG controller device node:
 		v1p8-supply = <&pm8941_l6>;
 		v3p3-supply = <&pm8941_l24>;
 
+		resets = <&gcc GCC_USB2A_PHY_BCR>, <&gcc GCC_USB_HS_BCR>;
+		reset-names = "phy", "link";
+
 		qcom,otg-control = <1>;
 		qcom,phy-init-sequence = <0x01 0x90 0xffffffff>;
 	};
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index cc230c8..53fc645 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -32,6 +32,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/reset.h>
 
 #include <linux/usb.h>
 #include <linux/usb/otg.h>
@@ -260,12 +261,16 @@ static void ulpi_init(struct msm_otg *motg)
 
 static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
 {
-	int ret = 0;
+	int ret;
 
-	if (!motg->pdata->link_clk_reset)
-		return ret;
+	if (motg->pdata->link_clk_reset)
+		ret = motg->pdata->link_clk_reset(motg->clk, assert);
+	else
+		if (assert)
+			ret = reset_control_assert(motg->link_rst);
+		else
+			ret = reset_control_deassert(motg->link_rst);
 
-	ret = motg->pdata->link_clk_reset(motg->clk, assert);
 	if (ret)
 		dev_err(motg->phy.dev, "usb link clk reset %s failed\n",
 			assert ? "assert" : "deassert");
@@ -275,12 +280,13 @@ static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
 
 static int msm_otg_phy_clk_reset(struct msm_otg *motg)
 {
-	int ret = 0;
+	int ret;
 
-	if (!motg->pdata->phy_clk_reset)
-		return ret;
+	if (motg->pdata->phy_clk_reset)
+		ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk);
+	else
+		ret = reset_control_reset(motg->phy_rst);
 
-	ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk);
 	if (ret)
 		dev_err(motg->phy.dev, "usb phy clk reset failed\n");
 
@@ -1373,6 +1379,14 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	id = of_match_device(msm_otg_dt_match, &pdev->dev);
 	pdata->phy_type = (int) id->data;
 
+	motg->link_rst = devm_reset_control_get(&pdev->dev, "link");
+	if (IS_ERR(motg->link_rst))
+		return PTR_ERR(motg->link_rst);
+
+	motg->phy_rst = devm_reset_control_get(&pdev->dev, "phy");
+	if (IS_ERR(motg->phy_rst))
+		return PTR_ERR(motg->phy_rst);
+
 	pdata->mode = of_usb_get_dr_mode(node);
 	if (pdata->mode == USB_DR_MODE_UNKNOWN)
 		pdata->mode = USB_DR_MODE_OTG;
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index 262ed80..9bf8943 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -163,6 +163,9 @@ struct msm_otg {
 	struct regulator *v3p3;
 	struct regulator *v1p8;
 	struct regulator *vddcx;
+
+	struct reset_control *phy_rst;
+	struct reset_control *link_rst;
 };
 
 #endif
-- 
1.7.9.5

[PATCH v4 12/15] usb: phy: msm: Add support for secondary PHY control

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>

Allow support to use 2nd HSPHY with USB2 Core.
Some platforms may have configuration to allow USB controller
work with any of the two HSPHYs present. By default driver
configures USB core to use primary HSPHY. Add support to allow
user select 2nd HSPHY using DT parameter.

Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
Cc: Manu Gautam <mgautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 .../devicetree/bindings/usb/msm-hsusb.txt          |    6 +++++
 drivers/usb/phy/phy-msm-usb.c                      |   24 ++++++++++++++++++--
 include/linux/usb/msm_hsusb.h                      |    1 +
 include/linux/usb/msm_hsusb_hw.h                   |    1 +
 4 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index 3f21204..d105ba9 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -72,6 +72,12 @@ Optional properties:
 - qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
 				terminate with -1
 
+- qcom,phy-num:	Select number of pyco-phy to use, can be one of
+				0 - PHY one, default
+				1 - Second PHY
+				Some platforms may have configuration to allow USB
+				controller work with any of the two HSPHYs present.
+
 Example HSUSB OTG controller device node:
 
 	usb@f9a55000 {
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 53fc645..01b571ff 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -340,6 +340,9 @@ static int msm_otg_phy_reset(struct msm_otg *motg)
 	if (!retries)
 		return -ETIMEDOUT;
 
+	if (motg->phy_number)
+		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
+
 	dev_info(motg->phy.dev, "phy_reset: success\n");
 	return 0;
 }
@@ -394,6 +397,9 @@ static int msm_otg_reset(struct usb_phy *phy)
 		ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_FALL);
 	}
 
+	if (motg->phy_number)
+		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
+
 	return 0;
 }
 
@@ -406,6 +412,7 @@ static int msm_otg_suspend(struct msm_otg *motg)
 	struct usb_phy *phy = &motg->phy;
 	struct usb_bus *bus = phy->otg->host;
 	struct msm_otg_platform_data *pdata = motg->pdata;
+	void __iomem *addr;
 	int cnt = 0;
 
 	if (atomic_read(&motg->in_lpm))
@@ -465,9 +472,13 @@ static int msm_otg_suspend(struct msm_otg *motg)
 	 */
 	writel(readl(USB_USBCMD) | ASYNC_INTR_CTRL | ULPI_STP_CTRL, USB_USBCMD);
 
+	addr = USB_PHY_CTRL;
+	if (motg->phy_number)
+		addr = USB_PHY_CTRL2;
+
 	if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
 			motg->pdata->otg_control == OTG_PMIC_CONTROL)
-		writel(readl(USB_PHY_CTRL) | PHY_RETEN, USB_PHY_CTRL);
+		writel(readl(addr) | PHY_RETEN, addr);
 
 	clk_disable_unprepare(motg->pclk);
 	clk_disable_unprepare(motg->clk);
@@ -497,6 +508,7 @@ static int msm_otg_resume(struct msm_otg *motg)
 {
 	struct usb_phy *phy = &motg->phy;
 	struct usb_bus *bus = phy->otg->host;
+	void __iomem *addr;
 	int cnt = 0;
 	unsigned temp;
 
@@ -510,9 +522,14 @@ static int msm_otg_resume(struct msm_otg *motg)
 
 	if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
 			motg->pdata->otg_control == OTG_PMIC_CONTROL) {
+
+		addr = USB_PHY_CTRL;
+		if (motg->phy_number)
+			addr = USB_PHY_CTRL2;
+
 		msm_hsusb_ldo_set_mode(motg, 1);
 		msm_hsusb_config_vddcx(motg, 1);
-		writel(readl(USB_PHY_CTRL) & ~PHY_RETEN, USB_PHY_CTRL);
+		writel(readl(addr) & ~PHY_RETEN, addr);
 	}
 
 	temp = readl(USB_USBCMD);
@@ -1395,6 +1412,9 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	if (!of_property_read_u32(node, "qcom,otg-control", &val))
 		pdata->otg_control = val;
 
+	if (!of_property_read_u32(node, "qcom,phy-num", &val))
+		motg->phy_number = val;
+
 	if (!of_get_property(node, "qcom,phy-init-sequence", &len) || !len)
 		return 0;
 
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index 9bf8943..da3a974 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -156,6 +156,7 @@ struct msm_otg {
 	atomic_t in_lpm;
 	int async_int;
 	unsigned cur_power;
+	int phy_number;
 	struct delayed_work chg_work;
 	enum usb_chg_state chg_state;
 	enum usb_chg_type chg_type;
diff --git a/include/linux/usb/msm_hsusb_hw.h b/include/linux/usb/msm_hsusb_hw.h
index 6e97a2d..e6d7035 100644
--- a/include/linux/usb/msm_hsusb_hw.h
+++ b/include/linux/usb/msm_hsusb_hw.h
@@ -25,6 +25,7 @@
 #define USB_OTGSC            (MSM_USB_BASE + 0x01A4)
 #define USB_USBMODE          (MSM_USB_BASE + 0x01A8)
 #define USB_PHY_CTRL         (MSM_USB_BASE + 0x0240)
+#define USB_PHY_CTRL2        (MSM_USB_BASE + 0x0278)
 
 #define USBCMD_RESET   2
 #define USB_USBINTR          (MSM_USB_BASE + 0x0148)
-- 
1.7.9.5

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[PATCH v4 13/15] usb: phy: msm: Correct USB PHY Reset sequence for newer platform

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>

On few legacy platforms, USB PHY is having dedicated reset clk.
It is used to reset USB PHY after putting USB PHY into low power
mode and for calibration of USB PHY. Putting USB PHY into low
power mode is causing ulpi read/write timeout as expected. USB PHY
reset clk is not available on newer platform.

For 28nm PHY, reset USB PHY after resestting USB LINK.
Also reset USB PHY using USB_PHY_PON bit with USB_OTG_HS_PHY_CTRL
register after programming USB PHY Override registers as suggested
with hardware programming guidelines.

Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
Cc: Mayank Rana <mrana-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/usb/phy/phy-msm-usb.c    |  141 ++++++++++++++++++++++++--------------
 include/linux/usb/msm_hsusb_hw.h |    5 ++
 2 files changed, 94 insertions(+), 52 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 01b571ff..1d88ff8 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -48,6 +48,7 @@
 #define DRIVER_NAME	"msm_otg"
 
 #define ULPI_IO_TIMEOUT_USEC	(10 * 1000)
+#define LINK_RESET_TIMEOUT_USEC	(250 * 1000)
 
 #define USB_PHY_3P3_VOL_MIN	3050000 /* uV */
 #define USB_PHY_3P3_VOL_MAX	3300000 /* uV */
@@ -293,77 +294,35 @@ static int msm_otg_phy_clk_reset(struct msm_otg *motg)
 	return ret;
 }
 
-static int msm_otg_phy_reset(struct msm_otg *motg)
+static int msm_link_reset(struct msm_otg *motg)
 {
 	u32 val;
 	int ret;
-	int retries;
 
 	ret = msm_otg_link_clk_reset(motg, 1);
 	if (ret)
 		return ret;
-	ret = msm_otg_phy_clk_reset(motg);
-	if (ret)
-		return ret;
-	ret = msm_otg_link_clk_reset(motg, 0);
-	if (ret)
-		return ret;
 
-	val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
-	writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
-
-	for (retries = 3; retries > 0; retries--) {
-		ret = ulpi_write(&motg->phy, ULPI_FUNC_CTRL_SUSPENDM,
-				ULPI_CLR(ULPI_FUNC_CTRL));
-		if (!ret)
-			break;
-		ret = msm_otg_phy_clk_reset(motg);
-		if (ret)
-			return ret;
-	}
-	if (!retries)
-		return -ETIMEDOUT;
+	/* wait for 1ms delay as suggested in HPG. */
+	usleep_range(1000, 1200);
 
-	/* This reset calibrates the phy, if the above write succeeded */
-	ret = msm_otg_phy_clk_reset(motg);
+	ret = msm_otg_link_clk_reset(motg, 0);
 	if (ret)
 		return ret;
 
-	for (retries = 3; retries > 0; retries--) {
-		ret = ulpi_read(&motg->phy, ULPI_DEBUG);
-		if (ret != -ETIMEDOUT)
-			break;
-		ret = msm_otg_phy_clk_reset(motg);
-		if (ret)
-			return ret;
-	}
-	if (!retries)
-		return -ETIMEDOUT;
-
 	if (motg->phy_number)
 		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
 
-	dev_info(motg->phy.dev, "phy_reset: success\n");
+	val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
+	writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
+
 	return 0;
 }
 
-#define LINK_RESET_TIMEOUT_USEC		(250 * 1000)
 static int msm_otg_reset(struct usb_phy *phy)
 {
 	struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
-	struct msm_otg_platform_data *pdata = motg->pdata;
 	int cnt = 0;
-	int ret;
-	u32 val = 0;
-	u32 ulpi_val = 0;
-
-	ret = msm_otg_phy_reset(motg);
-	if (ret) {
-		dev_err(phy->dev, "phy_reset failed\n");
-		return ret;
-	}
-
-	ulpi_init(motg);
 
 	writel(USBCMD_RESET, USB_USBCMD);
 	while (cnt < LINK_RESET_TIMEOUT_USEC) {
@@ -377,11 +336,87 @@ static int msm_otg_reset(struct usb_phy *phy)
 
 	/* select ULPI phy */
 	writel(0x80000000, USB_PORTSC);
+	writel(0x0, USB_AHBBURST);
+	writel(0x08, USB_AHBMODE);
+
+	if (motg->phy_number)
+		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
+	return 0;
+}
+
+static void msm_phy_reset(struct msm_otg *motg)
+{
+	void __iomem *addr;
+	u32 val;
+
+	if (motg->pdata->phy_type != SNPS_28NM_INTEGRATED_PHY) {
+		msm_otg_phy_clk_reset(motg);
+		return;
+	}
+
+	addr = USB_PHY_CTRL;
+	if (motg->phy_number)
+		addr = USB_PHY_CTRL2;
+
+	/* Assert USB PHY_PON */
+	val =  readl(addr);
+	val |= PHY_POR_ASSERT;
+	writel(val, addr);
+
+	/* wait for minimum 10 microseconds as suggested in HPG. */
+	usleep_range(10, 15);
+
+	/* Deassert USB PHY_PON */
+	val =  readl(addr);
+	val &= ~PHY_POR_ASSERT;
+	writel(val, addr);
+}
+
+static int msm_usb_reset(struct usb_phy *phy)
+{
+	struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+	int ret;
+
+	if (!IS_ERR(motg->core_clk))
+		clk_prepare_enable(motg->core_clk);
+
+	ret = msm_link_reset(motg);
+	if (ret) {
+		dev_err(phy->dev, "phy_reset failed\n");
+		return ret;
+	}
+
+	ret = msm_otg_reset(&motg->phy);
+	if (ret) {
+		dev_err(phy->dev, "link reset failed\n");
+		return ret;
+	}
 
 	msleep(100);
 
-	writel(0x0, USB_AHBBURST);
-	writel(0x00, USB_AHBMODE);
+	/* Reset USB PHY after performing USB Link RESET */
+	msm_phy_reset(motg);
+
+	if (!IS_ERR(motg->core_clk))
+		clk_disable_unprepare(motg->core_clk);
+
+	return 0;
+}
+
+static int msm_phy_init(struct usb_phy *phy)
+{
+	struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+	struct msm_otg_platform_data *pdata = motg->pdata;
+	u32 val, ulpi_val = 0;
+
+	/* Program USB PHY Override registers. */
+	ulpi_init(motg);
+
+	/*
+	 * It is recommended in HPG to reset USB PHY after programming
+	 * USB PHY Override registers.
+	 */
+	msm_phy_reset(motg);
 
 	if (pdata->otg_control == OTG_PHY_CONTROL) {
 		val = readl(USB_OTGSC);
@@ -1560,7 +1595,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 		goto disable_ldo;
 	}
 
-	phy->init = msm_otg_reset;
+	phy->init = msm_phy_init;
 	phy->set_power = msm_otg_set_power;
 
 	phy->io_ops = &msm_otg_io_ops;
@@ -1569,6 +1604,8 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 	phy->otg->set_host = msm_otg_set_host;
 	phy->otg->set_peripheral = msm_otg_set_peripheral;
 
+	msm_usb_reset(phy);
+
 	ret = usb_add_phy(&motg->phy, USB_PHY_TYPE_USB2);
 	if (ret) {
 		dev_err(&pdev->dev, "usb_add_phy failed\n");
diff --git a/include/linux/usb/msm_hsusb_hw.h b/include/linux/usb/msm_hsusb_hw.h
index e6d7035..575c743 100644
--- a/include/linux/usb/msm_hsusb_hw.h
+++ b/include/linux/usb/msm_hsusb_hw.h
@@ -42,9 +42,14 @@
 #define ULPI_DATA(n)          ((n) & 255)
 #define ULPI_DATA_READ(n)     (((n) >> 8) & 255)
 
+/* synopsys 28nm phy registers */
+#define ULPI_PWR_CLK_MNG_REG	0x88
+#define OTG_COMP_DISABLE	BIT(0)
+
 #define ASYNC_INTR_CTRL         (1 << 29) /* Enable async interrupt */
 #define ULPI_STP_CTRL           (1 << 30) /* Block communication with PHY */
 #define PHY_RETEN               (1 << 1) /* PHY retention enable/disable */
+#define PHY_POR_ASSERT		(1 << 0) /* USB2 28nm PHY POR ASSERT */
 
 /* OTG definitions */
 #define OTGSC_INTSTS_MASK	(0x7f << 16)
-- 
1.7.9.5

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[PATCH v4 14/15] usb: phy: msm: Handle disconnect events

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

Put the transceiver in non-driving mode. Otherwise host
may not detect soft-disconnection.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
---
 drivers/usb/phy/phy-msm-usb.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 1d88ff8..970f96b 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -260,6 +260,23 @@ static void ulpi_init(struct msm_otg *motg)
 	}
 }
 
+static int msm_phy_notify_disconnect(struct usb_phy *phy,
+				   enum usb_device_speed speed)
+{
+	int val;
+
+	/*
+	 * Put the transceiver in non-driving mode. Otherwise host
+	 * may not detect soft-disconnection.
+	 */
+	val = ulpi_read(phy, ULPI_FUNC_CTRL);
+	val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
+	val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
+	ulpi_write(phy, val, ULPI_FUNC_CTRL);
+
+	return 0;
+}
+
 static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
 {
 	int ret;
@@ -1597,6 +1614,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
 
 	phy->init = msm_phy_init;
 	phy->set_power = msm_otg_set_power;
+	phy->notify_disconnect = msm_phy_notify_disconnect;
 
 	phy->io_ops = &msm_otg_io_ops;
 
-- 
1.7.9.5

[PATCH v4 15/15] usb: phy: msm: Vote for corner of VDD CX instead of voltage of VDD CX

[Ivan T. Ivanov]

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

New platform uses RBCPR hardware feature, with that voting for
absolute voltage of VDD CX is not required. Hence vote for corner of
VDD CX which uses nominal corner voltage on VDD CX.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Cc: Mayank Rana <mrana@codeaurora.org>
Cc: devicetree@vger.kernel.org
---
 .../devicetree/bindings/usb/msm-hsusb.txt          |    6 ++++
 drivers/usb/phy/phy-msm-usb.c                      |   35 +++++++++++++++-----
 include/linux/usb/msm_hsusb.h                      |    1 +
 3 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index d105ba9..7b46395 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -78,6 +78,11 @@ Optional properties:
 				Some platforms may have configuration to allow USB
 				controller work with any of the two HSPHYs present.
 
+- qcom,vdd-levels: This property must be a list of three integer
+				values (no, min, max) where each value represents
+				either a voltage in microvolts or a value corresponding
+				to voltage corner.
+
 Example HSUSB OTG controller device node:
 
 	usb@f9a55000 {
@@ -100,4 +105,5 @@ Example HSUSB OTG controller device node:
 
 		qcom,otg-control = <1>;
 		qcom,phy-init-sequence = <0x01 0x90 0xffffffff>;
+		qcom,vdd-levels = <1 5 7>;
 	};
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 970f96b..b6e18b6 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -62,6 +62,13 @@
 
 #define USB_PHY_VDD_DIG_VOL_MIN	1000000 /* uV */
 #define USB_PHY_VDD_DIG_VOL_MAX	1320000 /* uV */
+#define USB_PHY_SUSP_DIG_VOL	500000  /* uV */
+
+enum vdd_levels {
+	VDD_LEVEL_NONE = 0,
+	VDD_LEVEL_MIN,
+	VDD_LEVEL_MAX,
+};
 
 static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 {
@@ -69,8 +76,8 @@ static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 
 	if (init) {
 		ret = regulator_set_voltage(motg->vddcx,
-				USB_PHY_VDD_DIG_VOL_MIN,
-				USB_PHY_VDD_DIG_VOL_MAX);
+				motg->vdd_levels[VDD_LEVEL_MIN],
+				motg->vdd_levels[VDD_LEVEL_MAX]);
 		if (ret) {
 			dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
 			return ret;
@@ -81,7 +88,7 @@ static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
 			dev_err(motg->phy.dev, "unable to enable hsusb vddcx\n");
 	} else {
 		ret = regulator_set_voltage(motg->vddcx, 0,
-			USB_PHY_VDD_DIG_VOL_MAX);
+				motg->vdd_levels[VDD_LEVEL_MAX]);
 		if (ret)
 			dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
 		ret = regulator_disable(motg->vddcx);
@@ -131,17 +138,16 @@ exit:
 }
 
 #ifdef CONFIG_PM_SLEEP
-#define USB_PHY_SUSP_DIG_VOL  500000
 static int msm_hsusb_config_vddcx(struct msm_otg *motg, int high)
 {
-	int max_vol = USB_PHY_VDD_DIG_VOL_MAX;
+	int max_vol = motg->vdd_levels[VDD_LEVEL_MAX];
 	int min_vol;
 	int ret;
 
 	if (high)
-		min_vol = USB_PHY_VDD_DIG_VOL_MIN;
+		min_vol = motg->vdd_levels[VDD_LEVEL_MIN];
 	else
-		min_vol = USB_PHY_SUSP_DIG_VOL;
+		min_vol = motg->vdd_levels[VDD_LEVEL_NONE];
 
 	ret = regulator_set_voltage(motg->vddcx, min_vol, max_vol);
 	if (ret) {
@@ -1437,7 +1443,7 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	const struct of_device_id *id;
 	struct device_node *node = pdev->dev.of_node;
 	int len = 0;
-	u32 val;
+	u32 val, tmp[3];
 
 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -1467,6 +1473,19 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 	if (!of_property_read_u32(node, "qcom,phy-num", &val))
 		motg->phy_number = val;
 
+	motg->vdd_levels[VDD_LEVEL_NONE] = USB_PHY_SUSP_DIG_VOL;
+	motg->vdd_levels[VDD_LEVEL_MIN] = USB_PHY_VDD_DIG_VOL_MIN;
+	motg->vdd_levels[VDD_LEVEL_MAX] = USB_PHY_VDD_DIG_VOL_MAX;
+
+	if (of_get_property(node, "qcom,vdd-levels", &len) &&
+	    len == sizeof(tmp)) {
+		of_property_read_u32_array(node, "qcom,vdd-levels",
+					   tmp, len / sizeof(*tmp));
+		motg->vdd_levels[VDD_LEVEL_NONE] = tmp[VDD_LEVEL_NONE];
+		motg->vdd_levels[VDD_LEVEL_MIN] = tmp[VDD_LEVEL_MIN];
+		motg->vdd_levels[VDD_LEVEL_MAX] = tmp[VDD_LEVEL_MAX];
+	}
+
 	if (!of_get_property(node, "qcom,phy-init-sequence", &len) || !len)
 		return 0;
 
diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index da3a974..f612cb9 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -167,6 +167,7 @@ struct msm_otg {
 
 	struct reset_control *phy_rst;
 	struct reset_control *link_rst;
+	int vdd_levels[3];
 };
 
 #endif
-- 
1.7.9.5

Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Christopher Covington]

Hi Ivan,

On 11/12/2013 09:51 AM, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
> 
> This patch fix compilation error when driver is compiled
> in multi-platform builds.
> 
> drivers/built-in.o: In function `msm_otg_link_clk_reset':
> ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
> ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
> 
> Use platform data supplied reset handlers and adjust error
> messages reported when reset sequence fail.
> 
> This is an intermediate step before adding support for reset
> framework and newer targets.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
> Acked-by: David Brown <davidb-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
> Cc: Daniel Walker <dwalker-zu3NM2574RrQT0dZR+AlfA@public.gmane.org>
> Cc: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
> Cc: Greg Kroah-Hartman <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
> ---
>  arch/arm/mach-msm/board-msm7x30.c |   35 +++++++++++++++++++++++++++++++++++
>  arch/arm/mach-msm/board-qsd8x50.c |   35 +++++++++++++++++++++++++++++++++++
>  drivers/usb/phy/phy-msm-usb.c     |   35 +++++++++++++++--------------------
>  include/linux/usb/msm_hsusb.h     |    3 +++
>  4 files changed, 88 insertions(+), 20 deletions(-)
> 
> diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
> index f9af5a4..46de789 100644
> --- a/arch/arm/mach-msm/board-msm7x30.c
> +++ b/arch/arm/mach-msm/board-msm7x30.c
> @@ -30,6 +30,7 @@
>  #include <asm/memory.h>
>  #include <asm/setup.h>
>  
> +#include <mach/clk.h>
>  #include <mach/msm_iomap.h>
>  #include <mach/dma.h>
>  
> @@ -60,10 +61,44 @@ static int hsusb_phy_init_seq[] = {
>  	-1
>  };
>  
> +static int hsusb_link_clk_reset(struct clk *link_clk, bool assert)
> +{
> +	int ret;
> +
> +	if (assert) {
> +		ret = clk_reset(link_clk, CLK_RESET_ASSERT);
> +		if (ret)
> +			pr_err("usb hs_clk assert failed\n");
> +	} else {
> +		ret = clk_reset(link_clk, CLK_RESET_DEASSERT);
> +		if (ret)
> +			pr_err("usb hs_clk deassert failed\n");
> +	}
> +	return ret;
> +}
> +
> +static int hsusb_phy_clk_reset(struct clk *phy_clk)
> +{
> +	int ret;
> +
> +	ret = clk_reset(phy_clk, CLK_RESET_ASSERT);
> +	if (ret) {
> +		pr_err("usb phy clk assert failed\n");
> +		return ret;
> +	}
> +	usleep_range(10000, 12000);
> +	ret = clk_reset(phy_clk, CLK_RESET_DEASSERT);
> +	if (ret)
> +		pr_err("usb phy clk deassert failed\n");
> +	return ret;
> +}
> +
>  static struct msm_otg_platform_data msm_otg_pdata = {
>  	.phy_init_seq		= hsusb_phy_init_seq,
>  	.mode                   = USB_PERIPHERAL,
>  	.otg_control		= OTG_PHY_CONTROL,
> +	.link_clk_reset		= hsusb_link_clk_reset,
> +	.phy_clk_reset		= hsusb_phy_clk_reset,
>  };
>  
>  struct msm_gpiomux_config msm_gpiomux_configs[GPIOMUX_NGPIOS] = {
> diff --git a/arch/arm/mach-msm/board-qsd8x50.c b/arch/arm/mach-msm/board-qsd8x50.c
> index 5f933bc..9169ec3 100644
> --- a/arch/arm/mach-msm/board-qsd8x50.c
> +++ b/arch/arm/mach-msm/board-qsd8x50.c
> @@ -31,6 +31,7 @@
>  #include <mach/irqs.h>
>  #include <mach/sirc.h>
>  #include <mach/vreg.h>
> +#include <mach/clk.h>
>  #include <linux/platform_data/mmc-msm_sdcc.h>
>  
>  #include "devices.h"
> @@ -81,10 +82,44 @@ static int hsusb_phy_init_seq[] = {
>  	-1
>  };
>  
> +static int hsusb_link_clk_reset(struct clk *link_clk, bool assert)
> +{
> +	int ret;
> +
> +	if (assert) {
> +		ret = clk_reset(link_clk, CLK_RESET_ASSERT);
> +		if (ret)
> +			pr_err("usb hs_clk assert failed\n");
> +	} else {
> +		ret = clk_reset(link_clk, CLK_RESET_DEASSERT);
> +		if (ret)
> +			pr_err("usb hs_clk deassert failed\n");
> +	}
> +	return ret;
> +}
> +
> +static int hsusb_phy_clk_reset(struct clk *phy_clk)
> +{
> +	int ret;
> +
> +	ret = clk_reset(phy_clk, CLK_RESET_ASSERT);
> +	if (ret) {
> +		pr_err("usb phy clk assert failed\n");
> +		return ret;
> +	}
> +	usleep_range(10000, 12000);
> +	ret = clk_reset(phy_clk, CLK_RESET_DEASSERT);
> +	if (ret)
> +		pr_err("usb phy clk deassert failed\n");
> +	return ret;
> +}

Why are there identical, static definitions of hsusb_link_clk_reset and
hsusb_phy_clk_reset across the two board files? Why not share a single
non-static set of definitions?

Thanks,
Christopher

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Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Ivan T. Ivanov]

Hi Christopher,

On Tue, 2013-11-12 at 13:27 -0500, Christopher Covington wrote:
> Hi Ivan,
> 
> On 11/12/2013 09:51 AM, Ivan T. Ivanov wrote:
> > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > 
> > This patch fix compilation error when driver is compiled
> > in multi-platform builds.
> > 
> > drivers/built-in.o: In function `msm_otg_link_clk_reset':
> > ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
> > ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
> > 
> > Use platform data supplied reset handlers and adjust error
> > messages reported when reset sequence fail.
> > 
> > This is an intermediate step before adding support for reset
> > framework and newer targets.
> > 
> > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > Acked-by: David Brown <davidb@codeaurora.org>
> > Cc: Daniel Walker <dwalker@fifo99.com>
> > Cc: Felipe Balbi <balbi@ti.com>
> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > ---
> >  arch/arm/mach-msm/board-msm7x30.c |   35 +++++++++++++++++++++++++++++++++++
> >  arch/arm/mach-msm/board-qsd8x50.c |   35 +++++++++++++++++++++++++++++++++++
> >  drivers/usb/phy/phy-msm-usb.c     |   35 +++++++++++++++--------------------
> >  include/linux/usb/msm_hsusb.h     |    3 +++
> >  4 files changed, 88 insertions(+), 20 deletions(-)
> > 
> > diff --git a/arch/arm/mach-msm/board-msm7x30.c b/arch/arm/mach-msm/board-msm7x30.c
> > index f9af5a4..46de789 100644
> > --- a/arch/arm/mach-msm/board-msm7x30.c
> > +++ b/arch/arm/mach-msm/board-msm7x30.c
> > @@ -30,6 +30,7 @@
> >  #include <asm/memory.h>
> >  #include <asm/setup.h>
> >  
> > +#include <mach/clk.h>
> >  #include <mach/msm_iomap.h>
> >  #include <mach/dma.h>
> >  
> > @@ -60,10 +61,44 @@ static int hsusb_phy_init_seq[] = {
> >  	-1
> >  };
> >  
> > +static int hsusb_link_clk_reset(struct clk *link_clk, bool assert)
> > +{
> > +	int ret;
> > +
> > +	if (assert) {
> > +		ret = clk_reset(link_clk, CLK_RESET_ASSERT);
> > +		if (ret)
> > +			pr_err("usb hs_clk assert failed\n");
> > +	} else {
> > +		ret = clk_reset(link_clk, CLK_RESET_DEASSERT);
> > +		if (ret)
> > +			pr_err("usb hs_clk deassert failed\n");
> > +	}
> > +	return ret;
> > +}
> > +
> > +static int hsusb_phy_clk_reset(struct clk *phy_clk)
> > +{
> > +	int ret;
> > +
> > +	ret = clk_reset(phy_clk, CLK_RESET_ASSERT);
> > +	if (ret) {
> > +		pr_err("usb phy clk assert failed\n");
> > +		return ret;
> > +	}
> > +	usleep_range(10000, 12000);
> > +	ret = clk_reset(phy_clk, CLK_RESET_DEASSERT);
> > +	if (ret)
> > +		pr_err("usb phy clk deassert failed\n");
> > +	return ret;
> > +}
> > +
> >  static struct msm_otg_platform_data msm_otg_pdata = {
> >  	.phy_init_seq		= hsusb_phy_init_seq,
> >  	.mode                   = USB_PERIPHERAL,
> >  	.otg_control		= OTG_PHY_CONTROL,
> > +	.link_clk_reset		= hsusb_link_clk_reset,
> > +	.phy_clk_reset		= hsusb_phy_clk_reset,
> >  };
> >  
> >  struct msm_gpiomux_config msm_gpiomux_configs[GPIOMUX_NGPIOS] = {
> > diff --git a/arch/arm/mach-msm/board-qsd8x50.c b/arch/arm/mach-msm/board-qsd8x50.c
> > index 5f933bc..9169ec3 100644
> > --- a/arch/arm/mach-msm/board-qsd8x50.c
> > +++ b/arch/arm/mach-msm/board-qsd8x50.c
> > @@ -31,6 +31,7 @@
> >  #include <mach/irqs.h>
> >  #include <mach/sirc.h>
> >  #include <mach/vreg.h>
> > +#include <mach/clk.h>
> >  #include <linux/platform_data/mmc-msm_sdcc.h>
> >  
> >  #include "devices.h"
> > @@ -81,10 +82,44 @@ static int hsusb_phy_init_seq[] = {
> >  	-1
> >  };
> >  
> > +static int hsusb_link_clk_reset(struct clk *link_clk, bool assert)
> > +{
> > +	int ret;
> > +
> > +	if (assert) {
> > +		ret = clk_reset(link_clk, CLK_RESET_ASSERT);
> > +		if (ret)
> > +			pr_err("usb hs_clk assert failed\n");
> > +	} else {
> > +		ret = clk_reset(link_clk, CLK_RESET_DEASSERT);
> > +		if (ret)
> > +			pr_err("usb hs_clk deassert failed\n");
> > +	}
> > +	return ret;
> > +}
> > +
> > +static int hsusb_phy_clk_reset(struct clk *phy_clk)
> > +{
> > +	int ret;
> > +
> > +	ret = clk_reset(phy_clk, CLK_RESET_ASSERT);
> > +	if (ret) {
> > +		pr_err("usb phy clk assert failed\n");
> > +		return ret;
> > +	}
> > +	usleep_range(10000, 12000);
> > +	ret = clk_reset(phy_clk, CLK_RESET_DEASSERT);
> > +	if (ret)
> > +		pr_err("usb phy clk deassert failed\n");
> > +	return ret;
> > +}
> 
> Why are there identical, static definitions of hsusb_link_clk_reset and
> hsusb_phy_clk_reset across the two board files? Why not share a single
> non-static set of definitions?

One file which is used by both boards and is compiled unconditionally 
is clock.c, but I don't think that it will be appropriate to put USB
specific functions there. Creating new file for just these functions
also do not sound good to me.

Regards,
Ivan

> 
> Thanks,
> Christopher
> 

Re: [PATCH v4 10/15] usb: phy: msm: Add device tree support and binding information

[Mark Rutland]

On Tue, Nov 12, 2013 at 02:51:45PM +0000, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> 
> Allows MSM OTG controller to be specified via device tree.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> Cc: devicetree@vger.kernel.org
> ---
>  .../devicetree/bindings/usb/msm-hsusb.txt          |   57 +++++++++++++-
>  drivers/usb/phy/phy-msm-usb.c                      |   79 +++++++++++++++++---
>  2 files changed, 124 insertions(+), 12 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> index 0a85eba..f1045e3 100644
> --- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> +++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> @@ -30,4 +30,59 @@ Required properties:
>  		dr_mode = "peripheral";
>  		interrupts = <0 134 0>;
>  		usb-phy = <&usb_otg>;
> -	};
> \ No newline at end of file
> +	};
> +
> +USB PHY with optional OTG:
> +
> +Required properties:
> +- compatible:	should contain "qcom,usb-otg-ci" for chipsets with
> +				Chipidea 45nm PHY or "qcom,usb-otg-snps" for chipsets
> +				with Synopsys 28nm PHY

To make this easier to read and extend in future, I'd reorganise this
like so:

compatible: should contain:
 * "qcom,usb-otg-ci" for chipsets with Chipidea 45nm PHY
 * "qcom,usb-otg-snps" for chipsets with Synopsys 28nm PHY

> +- regs:			offset and length of the register set in the memory map
> +- interrupts:	interrupt-specifier for the OTG interrupt.
> +
> +- clocks:		A list of phandle + clock-specifier pairs for the
> +				clocks listed in clock-names
> +- clock-names:	Should contain the following:
> +  "phy"			USB PHY reference clock
> +  "core"		Protocol engine clock
> +  "iface"		Interface bus clock
> +  "alt_core"	Optional: Protocol engine clock for targets with asynchronous
> +				reset methodology.

I'd rearrange that last entry:

"alt_core": Protocol engine clock for targets with asynchronous
            reset methodology. (optional)

> +
> +- dr_mode:		One of "host", "peripheral" or "otg". Defaults to "otg"

If this has a default and thus isn't required, it should be listed as
optional.

> +
> +- vdccx-supply:	phandle to the regulator for the vdd supply for
> +				digital circuit operation.
> +- v1p8-supply:	phandle to the regulator for the 1.8V supply
> +- v3p3-supply:	phandle to the regulator for the 3.3V supply
> +
> +- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
> +				1 - PHY control
> +				2 - PMIC control
> +				3 - User control (via debugfs)

NAK. This does not seem like a description of the hardware, and given
the debugfs comment is fundamentally tied to the way Linux functions
today.

> +
> +Optional properties:
> +- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> +				terminate with -1

What is this? I'm really not keen on having arbitrary register/memory
poking sequences in the dt.

Why does it need to be terminated? Surely the size of the property tells
you that it's terminated.

> +
> +Example HSUSB OTG controller device node:
> +
> +	usb@f9a55000 {
> +		compatible = "qcom,usb-otg-snps";
> +		reg = <0xf9a55000 0x400>;
> +		interrupts = <0 134 0>;;

s/;;/;/

> +		dr_mode = "peripheral";
> +
> +		clocks = <&gcc GCC_XO_CLK>, <&gcc GCC_USB_HS_SYSTEM_CLK>,
> +				<&gcc GCC_USB_HS_AHB_CLK>;
> +
> +		clock-names = "phy", "core", "iface";
> +
> +		vddcx-supply = <&pm8841_s2_corner>;
> +		v1p8-supply = <&pm8941_l6>;
> +		v3p3-supply = <&pm8941_l24>;
> +
> +		qcom,otg-control = <1>;
> +		qcom,phy-init-sequence = <0x01 0x90 0xffffffff>;

I believe modern dtc versions can handle negative numbers directly.

[...]

> +static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
> +{
> +	struct msm_otg_platform_data *pdata;
> +	const struct of_device_id *id;
> +	struct device_node *node = pdev->dev.of_node;
> +	int len = 0;
> +	u32 val;
> +
> +	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> +	if (!pdata)
> +		return -ENOMEM;
> +
> +	motg->pdata = pdata;
> +
> +	id = of_match_device(msm_otg_dt_match, &pdev->dev);
> +	pdata->phy_type = (int) id->data;
> +
> +	pdata->mode = of_usb_get_dr_mode(node);
> +	if (pdata->mode == USB_DR_MODE_UNKNOWN)
> +		pdata->mode = USB_DR_MODE_OTG;
> +
> +	pdata->otg_control = OTG_PHY_CONTROL;
> +	if (!of_property_read_u32(node, "qcom,otg-control", &val))
> +		pdata->otg_control = val;

Is this validated elsewhere?

Thanks,
Mark.

Re: [PATCH v4 12/15] usb: phy: msm: Add support for secondary PHY control

[Mark Rutland]

On Tue, Nov 12, 2013 at 02:51:47PM +0000, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> 
> Allow support to use 2nd HSPHY with USB2 Core.
> Some platforms may have configuration to allow USB controller
> work with any of the two HSPHYs present. By default driver
> configures USB core to use primary HSPHY. Add support to allow
> user select 2nd HSPHY using DT parameter.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> Cc: Manu Gautam <mgautam@codeaurora.org>
> Cc: devicetree@vger.kernel.org
> ---
>  .../devicetree/bindings/usb/msm-hsusb.txt          |    6 +++++
>  drivers/usb/phy/phy-msm-usb.c                      |   24 ++++++++++++++++++--
>  include/linux/usb/msm_hsusb.h                      |    1 +
>  include/linux/usb/msm_hsusb_hw.h                   |    1 +
>  4 files changed, 30 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> index 3f21204..d105ba9 100644
> --- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> +++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> @@ -72,6 +72,12 @@ Optional properties:
>  - qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
>  				terminate with -1
>  
> +- qcom,phy-num:	Select number of pyco-phy to use, can be one of
> +				0 - PHY one, default
> +				1 - Second PHY
> +				Some platforms may have configuration to allow USB
> +				controller work with any of the two HSPHYs present.
> +

Only one can be used at a time?

[...]

> @@ -1395,6 +1412,9 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
>  	if (!of_property_read_u32(node, "qcom,otg-control", &val))
>  		pdata->otg_control = val;
>  
> +	if (!of_property_read_u32(node, "qcom,phy-num", &val))
> +		motg->phy_number = val;

No sanity checking? If not all of your tests on the value of
motg->phy_number are the same form, you may get undepected results...

Mark.

Re: [PATCH v4 10/15] usb: phy: msm: Add device tree support and binding information

[Ivan T. Ivanov]

Hi Mark, 

On Fri, 2013-11-15 at 16:38 +0000, Mark Rutland wrote: 
> On Tue, Nov 12, 2013 at 02:51:45PM +0000, Ivan T. Ivanov wrote:
> > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > 
> > Allows MSM OTG controller to be specified via device tree.
> > 
> > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > Cc: devicetree@vger.kernel.org
> > ---
> >  .../devicetree/bindings/usb/msm-hsusb.txt          |   57 +++++++++++++-
> >  drivers/usb/phy/phy-msm-usb.c                      |   79 +++++++++++++++++---
> >  2 files changed, 124 insertions(+), 12 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > index 0a85eba..f1045e3 100644
> > --- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > +++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > @@ -30,4 +30,59 @@ Required properties:
> >  		dr_mode = "peripheral";
> >  		interrupts = <0 134 0>;
> >  		usb-phy = <&usb_otg>;
> > -	};
> > \ No newline at end of file
> > +	};
> > +
> > +USB PHY with optional OTG:
> > +
> > +Required properties:
> > +- compatible:	should contain "qcom,usb-otg-ci" for chipsets with
> > +				Chipidea 45nm PHY or "qcom,usb-otg-snps" for chipsets
> > +				with Synopsys 28nm PHY
> 
> To make this easier to read and extend in future, I'd reorganise this
> like so:
> 
> compatible: should contain:
>  * "qcom,usb-otg-ci" for chipsets with Chipidea 45nm PHY
>  * "qcom,usb-otg-snps" for chipsets with Synopsys 28nm PHY


Ok.

> 
> > +- regs:			offset and length of the register set in the memory map
> > +- interrupts:	interrupt-specifier for the OTG interrupt.
> > +
> > +- clocks:		A list of phandle + clock-specifier pairs for the
> > +				clocks listed in clock-names
> > +- clock-names:	Should contain the following:
> > +  "phy"			USB PHY reference clock
> > +  "core"		Protocol engine clock
> > +  "iface"		Interface bus clock
> > +  "alt_core"	Optional: Protocol engine clock for targets with asynchronous
> > +				reset methodology.
> 
> I'd rearrange that last entry:
> 
> "alt_core": Protocol engine clock for targets with asynchronous
>             reset methodology. (optional)

ok.

> 
> > +
> > +- dr_mode:		One of "host", "peripheral" or "otg". Defaults to "otg"
> 
> If this has a default and thus isn't required, it should be listed as
> optional.

This is part of the standard USB bindings, Perhaps I could just
refer to:  Documentation/devicetree/bindings/usb/generic.txt


> 
> > +
> > +- vdccx-supply:	phandle to the regulator for the vdd supply for
> > +				digital circuit operation.
> > +- v1p8-supply:	phandle to the regulator for the 1.8V supply
> > +- v3p3-supply:	phandle to the regulator for the 3.3V supply
> > +
> > +- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
> > +				1 - PHY control
> > +				2 - PMIC control
> > +				3 - User control (via debugfs)
> 
> NAK. This does not seem like a description of the hardware, and given
> the debugfs comment is fundamentally tied to the way Linux functions
> today.

I will remove option 3, but rest are really property of the chipset. 

> 
> > +
> > +Optional properties:
> > +- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> > +				terminate with -1
> 
> What is this? I'm really not keen on having arbitrary register/memory
> poking sequences in the dt.

This is related Device Mode Eye Diagram test and values used could be
different between chipsets.

> 
> Why does it need to be terminated? Surely the size of the property tells
> you that it's terminated.

Yes. -1 termination could be done in driver.

> 
> > +
> > +Example HSUSB OTG controller device node:
> > +
> > +	usb@f9a55000 {
> > +		compatible = "qcom,usb-otg-snps";
> > +		reg = <0xf9a55000 0x400>;
> > +		interrupts = <0 134 0>;;
> 
> s/;;/;/

thanks

> 
> > +		dr_mode = "peripheral";
> > +
> > +		clocks = <&gcc GCC_XO_CLK>, <&gcc GCC_USB_HS_SYSTEM_CLK>,
> > +				<&gcc GCC_USB_HS_AHB_CLK>;
> > +
> > +		clock-names = "phy", "core", "iface";
> > +
> > +		vddcx-supply = <&pm8841_s2_corner>;
> > +		v1p8-supply = <&pm8941_l6>;
> > +		v3p3-supply = <&pm8941_l24>;
> > +
> > +		qcom,otg-control = <1>;
> > +		qcom,phy-init-sequence = <0x01 0x90 0xffffffff>;
> 
> I believe modern dtc versions can handle negative numbers directly.
> 
> [...]
> 
> > +static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
> > +{
> > +	struct msm_otg_platform_data *pdata;
> > +	const struct of_device_id *id;
> > +	struct device_node *node = pdev->dev.of_node;
> > +	int len = 0;
> > +	u32 val;
> > +
> > +	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> > +	if (!pdata)
> > +		return -ENOMEM;
> > +
> > +	motg->pdata = pdata;
> > +
> > +	id = of_match_device(msm_otg_dt_match, &pdev->dev);
> > +	pdata->phy_type = (int) id->data;
> > +
> > +	pdata->mode = of_usb_get_dr_mode(node);
> > +	if (pdata->mode == USB_DR_MODE_UNKNOWN)
> > +		pdata->mode = USB_DR_MODE_OTG;
> > +
> > +	pdata->otg_control = OTG_PHY_CONTROL;
> > +	if (!of_property_read_u32(node, "qcom,otg-control", &val))
> > +		pdata->otg_control = val;
> 
> Is this validated elsewhere?

No. I will add check.

Thanks.
Ivan

> 
> Thanks,
> Mark.

Re: [PATCH v4 12/15] usb: phy: msm: Add support for secondary PHY control

[Ivan T. Ivanov]

Hi Mark,

On Fri, 2013-11-15 at 16:42 +0000, Mark Rutland wrote: 
> On Tue, Nov 12, 2013 at 02:51:47PM +0000, Ivan T. Ivanov wrote:
> > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > 
> > Allow support to use 2nd HSPHY with USB2 Core.
> > Some platforms may have configuration to allow USB controller
> > work with any of the two HSPHYs present. By default driver
> > configures USB core to use primary HSPHY. Add support to allow
> > user select 2nd HSPHY using DT parameter.
> > 
> > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > Cc: Manu Gautam <mgautam@codeaurora.org>
> > Cc: devicetree@vger.kernel.org
> > ---
> >  .../devicetree/bindings/usb/msm-hsusb.txt          |    6 +++++
> >  drivers/usb/phy/phy-msm-usb.c                      |   24 ++++++++++++++++++--
> >  include/linux/usb/msm_hsusb.h                      |    1 +
> >  include/linux/usb/msm_hsusb_hw.h                   |    1 +
> >  4 files changed, 30 insertions(+), 2 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > index 3f21204..d105ba9 100644
> > --- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > +++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > @@ -72,6 +72,12 @@ Optional properties:
> >  - qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> >  				terminate with -1
> >  
> > +- qcom,phy-num:	Select number of pyco-phy to use, can be one of
> > +				0 - PHY one, default
> > +				1 - Second PHY
> > +				Some platforms may have configuration to allow USB
> > +				controller work with any of the two HSPHYs present.
> > +
> 
> Only one can be used at a time?

Yes only one of them. Selected at driver init time. 

> 
> [...]
> 
> > @@ -1395,6 +1412,9 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
> >  	if (!of_property_read_u32(node, "qcom,otg-control", &val))
> >  		pdata->otg_control = val;
> >  
> > +	if (!of_property_read_u32(node, "qcom,phy-num", &val))
> > +		motg->phy_number = val;
> 
> No sanity checking? If not all of your tests on the value of
> motg->phy_number are the same form, you may get undepected results...


All checks are the same, but will add explicit check.

Thanks, 
Ivan 

> 
> Mark.

Re: [PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[Felipe Balbi]

[-- Attachment #1: Type: text/plain, Size: 1048 bytes --]

Hi,

On Tue, Nov 12, 2013 at 04:51:35PM +0200, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> 
> Hi, 
> 
> Patches have been tested on top of Stephen's clock controller
> patches[1] and recent fixes for chipidea msm glue layer driver
> posted here[2]. Hardware platform AP8074 DragonBoard. Only gadget
> mode utilized for now. 
> 
> CV Test Suite engine "Chapter 9 tests" are passing except
> "Halt Endpoint Test".
> 
> usbtest driver report following failure:
> test 13 --> 32 (Broken pipe) 		ep 81 couldn't set halt, -32
> 
> This will be investigated further. 
> Patches could be applied cleanly on top of the usb-3.13-rc1.
> 
> Regards,
> Ivan
> 
> [1] http://comments.gmane.org/gmane.linux.ports.arm.msm/5375
> [2] https://lkml.org/lkml/2013/11/11/310

I wonder how will this be taken upstream provided there are
interdependencies between arch/ and drivers/ patches.

I can Ack patches but I'd really like to avoid merging of topic branches
all over the place :-s

cheers

-- 
balbi

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]

Re: [PATCH v4 10/15] usb: phy: msm: Add device tree support and binding information

[Mark Rutland]

On Mon, Nov 18, 2013 at 12:54:37PM +0000, Ivan T. Ivanov wrote:
> Hi Mark, 
> 
> On Fri, 2013-11-15 at 16:38 +0000, Mark Rutland wrote: 
> > On Tue, Nov 12, 2013 at 02:51:45PM +0000, Ivan T. Ivanov wrote:
> > > From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
> > > 
> > > Allows MSM OTG controller to be specified via device tree.
> > > 
> > > Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
> > > Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > > ---
> > >  .../devicetree/bindings/usb/msm-hsusb.txt          |   57 +++++++++++++-
> > >  drivers/usb/phy/phy-msm-usb.c                      |   79 +++++++++++++++++---
> > >  2 files changed, 124 insertions(+), 12 deletions(-)

[...]

> > > +
> > > +- dr_mode:		One of "host", "peripheral" or "otg". Defaults to "otg"
> > 
> > If this has a default and thus isn't required, it should be listed as
> > optional.
> 
> This is part of the standard USB bindings, Perhaps I could just
> refer to:  Documentation/devicetree/bindings/usb/generic.txt

That would be fine, but it should also be moved to the optional
properties section.

> 
> 
> > 
> > > +
> > > +- vdccx-supply:	phandle to the regulator for the vdd supply for
> > > +				digital circuit operation.
> > > +- v1p8-supply:	phandle to the regulator for the 1.8V supply
> > > +- v3p3-supply:	phandle to the regulator for the 3.3V supply
> > > +
> > > +- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
> > > +				1 - PHY control
> > > +				2 - PMIC control
> > > +				3 - User control (via debugfs)
> > 
> > NAK. This does not seem like a description of the hardware, and given
> > the debugfs comment is fundamentally tied to the way Linux functions
> > today.
> 
> I will remove option 3, but rest are really property of the chipset. 

Can you elaborate on the diffence please?

> 
> > 
> > > +
> > > +Optional properties:
> > > +- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> > > +				terminate with -1
> > 
> > What is this? I'm really not keen on having arbitrary register/memory
> > poking sequences in the dt.
> 
> This is related Device Mode Eye Diagram test and values used could be
> different between chipsets.

Ok. Then we should encode the tuning data rather than adding a mechanism
to allow for writes to arbitrary addresses.

> 
> > 
> > Why does it need to be terminated? Surely the size of the property tells
> > you that it's terminated.
> 
> Yes. -1 termination could be done in driver.

Please do. There's no need for it to be in the DT.

Cheers,
Mark.
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Re: [PATCH v4 12/15] usb: phy: msm: Add support for secondary PHY control

[Mark Rutland]

On Mon, Nov 18, 2013 at 12:57:42PM +0000, Ivan T. Ivanov wrote:
> 
> Hi Mark,
> 
> On Fri, 2013-11-15 at 16:42 +0000, Mark Rutland wrote: 
> > On Tue, Nov 12, 2013 at 02:51:47PM +0000, Ivan T. Ivanov wrote:
> > > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > > 
> > > Allow support to use 2nd HSPHY with USB2 Core.
> > > Some platforms may have configuration to allow USB controller
> > > work with any of the two HSPHYs present. By default driver
> > > configures USB core to use primary HSPHY. Add support to allow
> > > user select 2nd HSPHY using DT parameter.
> > > 
> > > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > > Cc: Manu Gautam <mgautam@codeaurora.org>
> > > Cc: devicetree@vger.kernel.org
> > > ---
> > >  .../devicetree/bindings/usb/msm-hsusb.txt          |    6 +++++
> > >  drivers/usb/phy/phy-msm-usb.c                      |   24 ++++++++++++++++++--
> > >  include/linux/usb/msm_hsusb.h                      |    1 +
> > >  include/linux/usb/msm_hsusb_hw.h                   |    1 +
> > >  4 files changed, 30 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > > index 3f21204..d105ba9 100644
> > > --- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > > +++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > > @@ -72,6 +72,12 @@ Optional properties:
> > >  - qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> > >  				terminate with -1
> > >  
> > > +- qcom,phy-num:	Select number of pyco-phy to use, can be one of
> > > +				0 - PHY one, default
> > > +				1 - Second PHY
> > > +				Some platforms may have configuration to allow USB
> > > +				controller work with any of the two HSPHYs present.
> > > +
> > 
> > Only one can be used at a time?
> 
> Yes only one of them. Selected at driver init time. 

Ok. For a given platform, is it likely that both are wired up and
_possibly_ usable?

Thanks
Mark.

Re: [PATCH v4 12/15] usb: phy: msm: Add support for secondary PHY control

[Ivan T. Ivanov]

Hi, 

On Thu, 2013-12-05 at 10:42 +0000, Mark Rutland wrote: 
> On Mon, Nov 18, 2013 at 12:57:42PM +0000, Ivan T. Ivanov wrote:
> > 
> > Hi Mark,
> > 
> > On Fri, 2013-11-15 at 16:42 +0000, Mark Rutland wrote: 
> > > On Tue, Nov 12, 2013 at 02:51:47PM +0000, Ivan T. Ivanov wrote:
> > > > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > > > 
> > > > Allow support to use 2nd HSPHY with USB2 Core.
> > > > Some platforms may have configuration to allow USB controller
> > > > work with any of the two HSPHYs present. By default driver
> > > > configures USB core to use primary HSPHY. Add support to allow
> > > > user select 2nd HSPHY using DT parameter.
> > > > 
> > > > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > > > Cc: Manu Gautam <mgautam@codeaurora.org>
> > > > Cc: devicetree@vger.kernel.org
> > > > ---
> > > >  .../devicetree/bindings/usb/msm-hsusb.txt          |    6 +++++
> > > >  drivers/usb/phy/phy-msm-usb.c                      |   24 ++++++++++++++++++--
> > > >  include/linux/usb/msm_hsusb.h                      |    1 +
> > > >  include/linux/usb/msm_hsusb_hw.h                   |    1 +
> > > >  4 files changed, 30 insertions(+), 2 deletions(-)
> > > > 
> > > > diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > > > index 3f21204..d105ba9 100644
> > > > --- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > > > +++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
> > > > @@ -72,6 +72,12 @@ Optional properties:
> > > >  - qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> > > >  				terminate with -1
> > > >  
> > > > +- qcom,phy-num:	Select number of pyco-phy to use, can be one of
> > > > +				0 - PHY one, default
> > > > +				1 - Second PHY
> > > > +				Some platforms may have configuration to allow USB
> > > > +				controller work with any of the two HSPHYs present.
> > > > +
> > > 
> > > Only one can be used at a time?
> > 
> > Yes only one of them. Selected at driver init time. 
> 
> Ok. For a given platform, is it likely that both are wired up and
> _possibly_ usable?


My guess is that this is possible :-) Regards. Ivan

> 
> Thanks
> Mark.

Re: [PATCH v4 10/15] usb: phy: msm: Add device tree support and binding information

[Ivan T. Ivanov]

Hi, 

On Thu, 2013-12-05 at 10:41 +0000, Mark Rutland wrote: 
> On Mon, Nov 18, 2013 at 12:54:37PM +0000, Ivan T. Ivanov wrote:
> > Hi Mark, 
> > 
> > On Fri, 2013-11-15 at 16:38 +0000, Mark Rutland wrote: 
> > > On Tue, Nov 12, 2013 at 02:51:45PM +0000, Ivan T. Ivanov wrote:
> > > > From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> > > > 
> > > > Allows MSM OTG controller to be specified via device tree.
> > > > 
> > > > Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> > > > Cc: devicetree@vger.kernel.org
> > > > ---
> > > >  .../devicetree/bindings/usb/msm-hsusb.txt          |   57 +++++++++++++-
> > > >  drivers/usb/phy/phy-msm-usb.c                      |   79 +++++++++++++++++---
> > > >  2 files changed, 124 insertions(+), 12 deletions(-)
> 
> [...]
> 
> > > > +
> > > > +- dr_mode:		One of "host", "peripheral" or "otg". Defaults to "otg"
> > > 
> > > If this has a default and thus isn't required, it should be listed as
> > > optional.
> > 
> > This is part of the standard USB bindings, Perhaps I could just
> > refer to:  Documentation/devicetree/bindings/usb/generic.txt
> 
> That would be fine, but it should also be moved to the optional
> properties section.

Ok.

> 
> > 
> > 
> > > 
> > > > +
> > > > +- vdccx-supply:	phandle to the regulator for the vdd supply for
> > > > +				digital circuit operation.
> > > > +- v1p8-supply:	phandle to the regulator for the 1.8V supply
> > > > +- v3p3-supply:	phandle to the regulator for the 3.3V supply
> > > > +
> > > > +- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
> > > > +				1 - PHY control
> > > > +				2 - PMIC control
> > > > +				3 - User control (via debugfs)
> > > 
> > > NAK. This does not seem like a description of the hardware, and given
> > > the debugfs comment is fundamentally tied to the way Linux functions
> > > today.
> > 
> > I will remove option 3, but rest are really property of the chipset. 
> 
> Can you elaborate on the diffence please?

Difference is how VBUS, ID changes, Accessory and Charger
detection is handled. In older chips-sets they are handled
by PHY controller, while now they are handled by external
PMIC logic.

> 
> > 
> > > 
> > > > +
> > > > +Optional properties:
> > > > +- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
> > > > +				terminate with -1
> > > 
> > > What is this? I'm really not keen on having arbitrary register/memory
> > > poking sequences in the dt.
> > 
> > This is related Device Mode Eye Diagram test and values used could be
> > different between chipsets.
> 
> Ok. Then we should encode the tuning data rather than adding a mechanism
> to allow for writes to arbitrary addresses.

Currently: 

for msm8226 sequence is < 0x44 0x80 0x68 0x81 0x24 0x82 0x13 0x83 >
for msm8974 sequence is < 0x63 0x81 >

I could reserve -1 as "do not program" value and document that 
values in this array will be written to ULPI interface with
ULPI_EXT_VENDOR_SPECIFIC as base address.

for msm8974 sequence will be < -1 0x63 >

> 
> > 
> > > 
> > > Why does it need to be terminated? Surely the size of the property tells
> > > you that it's terminated.
> > 
> > Yes. -1 termination could be done in driver.
> 
> Please do. There's no need for it to be in the DT.


Thanks. Ivan

> 
> Cheers,
> Mark.
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Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Ivan T. Ivanov]

On Tue, 2013-11-12 at 16:51 +0200, Ivan T. Ivanov wrote: 
> From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
> 
> This patch fix compilation error when driver is compiled
> in multi-platform builds.
> 
> drivers/built-in.o: In function `msm_otg_link_clk_reset':
> ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
> ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
> 
> Use platform data supplied reset handlers and adjust error
> messages reported when reset sequence fail.
> 
> This is an intermediate step before adding support for reset
> framework and newer targets.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
> Acked-by: David Brown <davidb-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>


David, could you take this change trough your tree?

Thanks, Ivan


> Cc: Daniel Walker <dwalker-zu3NM2574RrQT0dZR+AlfA@public.gmane.org>
> Cc: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
> Cc: Greg Kroah-Hartman <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
> ---
>  arch/arm/mach-msm/board-msm7x30.c |   35 +++++++++++++++++++++++++++++++++++
>  arch/arm/mach-msm/board-qsd8x50.c |   35 +++++++++++++++++++++++++++++++++++
>  drivers/usb/phy/phy-msm-usb.c     |   35 +++++++++++++++--------------------
>  include/linux/usb/msm_hsusb.h     |    3 +++
>  4 files changed, 88 insertions(+), 20 deletions(-)


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Re: [PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[David Brown]

On Tue, Nov 26, 2013 at 10:38:46AM -0600, Felipe Balbi wrote:
>Hi,
>
>On Tue, Nov 12, 2013 at 04:51:35PM +0200, Ivan T. Ivanov wrote:
>> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
>>
>> Hi,
>>
>> Patches have been tested on top of Stephen's clock controller
>> patches[1] and recent fixes for chipidea msm glue layer driver
>> posted here[2]. Hardware platform AP8074 DragonBoard. Only gadget
>> mode utilized for now.
>>
>> CV Test Suite engine "Chapter 9 tests" are passing except
>> "Halt Endpoint Test".
>>
>> usbtest driver report following failure:
>> test 13 --> 32 (Broken pipe) 		ep 81 couldn't set halt, -32
>>
>> This will be investigated further.
>> Patches could be applied cleanly on top of the usb-3.13-rc1.
>>
>> Regards,
>> Ivan
>>
>> [1] http://comments.gmane.org/gmane.linux.ports.arm.msm/5375
>> [2] https://lkml.org/lkml/2013/11/11/310
>
>I wonder how will this be taken upstream provided there are
>interdependencies between arch/ and drivers/ patches.
>
>I can Ack patches but I'd really like to avoid merging of topic branches
>all over the place :-s

Ivan's patches are the only ones in this window that touch these board
files in MSM.  It's probably easiest if I ack them, and you can bring
the whole series through your tree.

David

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Re: [PATCH v4 06/15] usb: phy: msm: Replace custom enum usb_mode_type with enum usb_dr_mode

[David Brown]

On Tue, Nov 12, 2013 at 04:51:41PM +0200, Ivan T. Ivanov wrote:
>From: "Ivan T. Ivanov" <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
>
>Use enum usb_dr_mode and drop default usb_dr_mode from platform data.
>
>USB DT bindings states: dr_mode: "...In case this attribute isn't
>passed via DT, USB DRD controllers should default to OTG...",
>so remove redundand field.
>
>Signed-off-by: Ivan T. Ivanov <iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org>
>---
> arch/arm/mach-msm/board-msm7x30.c |    2 +-
> arch/arm/mach-msm/board-qsd8x50.c |    2 +-

Acked-by: David Brown <davidb-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>

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Re: [PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[Felipe Balbi]

[-- Attachment #1: Type: text/plain, Size: 1587 bytes --]

On Thu, Dec 19, 2013 at 03:03:15PM -0800, David Brown wrote:
> On Tue, Nov 26, 2013 at 10:38:46AM -0600, Felipe Balbi wrote:
> >Hi,
> >
> >On Tue, Nov 12, 2013 at 04:51:35PM +0200, Ivan T. Ivanov wrote:
> >>From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> >>
> >>Hi,
> >>
> >>Patches have been tested on top of Stephen's clock controller
> >>patches[1] and recent fixes for chipidea msm glue layer driver
> >>posted here[2]. Hardware platform AP8074 DragonBoard. Only gadget
> >>mode utilized for now.
> >>
> >>CV Test Suite engine "Chapter 9 tests" are passing except
> >>"Halt Endpoint Test".
> >>
> >>usbtest driver report following failure:
> >>test 13 --> 32 (Broken pipe) 		ep 81 couldn't set halt, -32
> >>
> >>This will be investigated further.
> >>Patches could be applied cleanly on top of the usb-3.13-rc1.
> >>
> >>Regards,
> >>Ivan
> >>
> >>[1] http://comments.gmane.org/gmane.linux.ports.arm.msm/5375
> >>[2] https://lkml.org/lkml/2013/11/11/310
> >
> >I wonder how will this be taken upstream provided there are
> >interdependencies between arch/ and drivers/ patches.
> >
> >I can Ack patches but I'd really like to avoid merging of topic branches
> >all over the place :-s
> 
> Ivan's patches are the only ones in this window that touch these board
> files in MSM.  It's probably easiest if I ack them, and you can bring
> the whole series through your tree.

it's getting quite late for me. I still want to leave my stuff soaking
in linux-next for a while. I'll try my best, though, if you ack it ASAP
;-)

cheers

-- 
balbi

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Re: [PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[David Brown]

On Thu, Dec 19, 2013 at 05:26:13PM -0600, Felipe Balbi wrote:

>it's getting quite late for me. I still want to leave my stuff soaking
>in linux-next for a while. I'll try my best, though, if you ack it ASAP

Thanks.  Patch 1 already has my Ack in it, and I've sent an ack for
number 6.

David

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Re: [PATCH v4 00/15] usb: phy: msm: Fixes, cleanups and DT support

[Stephen Boyd]

On 12/20, David Brown wrote:
> On Thu, Dec 19, 2013 at 05:26:13PM -0600, Felipe Balbi wrote:
> 
> >it's getting quite late for me. I still want to leave my stuff soaking
> >in linux-next for a while. I'll try my best, though, if you ack it ASAP
> 
> Thanks.  Patch 1 already has my Ack in it, and I've sent an ack for
> number 6.
> 

Felipe,

If this isn't picked up for 3.14 can we get an ack on patch 1 so
we can send it through arm-soc as part of the multi-platform
patches I have for MSM[1]?

[1] https://lkml.org/lkml/2013/12/4/523
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Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Felipe Balbi]

[-- Attachment #1: Type: text/plain, Size: 1046 bytes --]

Hi,

On Tue, Nov 12, 2013 at 04:51:36PM +0200, Ivan T. Ivanov wrote:
> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> 
> This patch fix compilation error when driver is compiled
> in multi-platform builds.
> 
> drivers/built-in.o: In function `msm_otg_link_clk_reset':
> ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
> ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
> 
> Use platform data supplied reset handlers and adjust error
> messages reported when reset sequence fail.
> 
> This is an intermediate step before adding support for reset
> framework and newer targets.
> 
> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> Acked-by: David Brown <davidb@codeaurora.org>
> Cc: Daniel Walker <dwalker@fifo99.com>
> Cc: Felipe Balbi <balbi@ti.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

this really looks like you should be using reset framework
(drivers/reset/), then your phy driver would simply reset_assert() and
reset_deassert().

-- 
balbi

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Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Stephen Boyd]

On 12/27/13 10:10, Felipe Balbi wrote:
> Hi,
>
> On Tue, Nov 12, 2013 at 04:51:36PM +0200, Ivan T. Ivanov wrote:
>> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
>>
>> This patch fix compilation error when driver is compiled
>> in multi-platform builds.
>>
>> drivers/built-in.o: In function `msm_otg_link_clk_reset':
>> ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
>> ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
>>
>> Use platform data supplied reset handlers and adjust error
>> messages reported when reset sequence fail.
>>
>> This is an intermediate step before adding support for reset
>> framework and newer targets.
>>
>> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
>> Acked-by: David Brown <davidb@codeaurora.org>
>> Cc: Daniel Walker <dwalker@fifo99.com>
>> Cc: Felipe Balbi <balbi@ti.com>
>> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> this really looks like you should be using reset framework
> (drivers/reset/), then your phy driver would simply reset_assert() and
> reset_deassert().
>

Unfortunately the reset framework is a DT only framework and there are
still non-DT platforms within mach-msm. Arnd suggested we push the
non-DT reset code down into the mach directory in the meantime. We're in
the process of adding the reset framework to DT enabled MSM platforms,
hopefully those get merged in 3.14.

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Re: [PATCH v4 01/15] usb: phy: msm: Move mach dependent code to platform data

[Felipe Balbi]

[-- Attachment #1: Type: text/plain, Size: 2085 bytes --]

On Fri, Dec 27, 2013 at 10:23:10AM -0800, Stephen Boyd wrote:
> On 12/27/13 10:10, Felipe Balbi wrote:
> > Hi,
> >
> > On Tue, Nov 12, 2013 at 04:51:36PM +0200, Ivan T. Ivanov wrote:
> >> From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
> >>
> >> This patch fix compilation error when driver is compiled
> >> in multi-platform builds.
> >>
> >> drivers/built-in.o: In function `msm_otg_link_clk_reset':
> >> ./drivers/usb/phy/phy-msm-usb.c:314: undefined reference to `clk_reset'
> >> ./drivers/usb/phy/phy-msm-usb.c:318: undefined reference to `clk_reset'
> >>
> >> Use platform data supplied reset handlers and adjust error
> >> messages reported when reset sequence fail.
> >>
> >> This is an intermediate step before adding support for reset
> >> framework and newer targets.
> >>
> >> Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
> >> Acked-by: David Brown <davidb@codeaurora.org>
> >> Cc: Daniel Walker <dwalker@fifo99.com>
> >> Cc: Felipe Balbi <balbi@ti.com>
> >> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > this really looks like you should be using reset framework
> > (drivers/reset/), then your phy driver would simply reset_assert() and
> > reset_deassert().
> >
> 
> Unfortunately the reset framework is a DT only framework and there are
> still non-DT platforms within mach-msm. Arnd suggested we push the
> non-DT reset code down into the mach directory in the meantime. We're in
> the process of adding the reset framework to DT enabled MSM platforms,
> hopefully those get merged in 3.14.

And this is why the ARM port is in such a messy situation. It's always
better to "push things into the mach- directory" than improving existing
frameworks to cope with wild ARM SoCs.

fell free to push this through your tree. It _does_ make the PHY driver
slightly better and probably buildable on other arches with
COMPILE_TEST.

Still, I *really* want to see this switching over to reset framework on
v3.16.

cheers

ps: for this patch only you can have my

Acked-by: Felipe Balbi <balbi@ti.com>

-- 
balbi

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