[PATCH 0/6] mfd: omap-usb-host: Device tree support for 3.10

[PATCH 0/6] mfd: omap-usb-host: Device tree support for 3.10

[Roger Quadros]

Hi Samuel,

These patches implement device tree support for the OMAP High Speed
USB Host subsystem. The corresponding EHCI & SoC patches will be sent
separately and this set has no build dependencies with them.

Patch 3 is acutally a bug fix which should go into 3.9-rc. I've sent
it separately to you before.

The following changes since commit f6161aa153581da4a3867a2d1a7caf4be19b6ec9:

  Linux 3.9-rc2 (2013-03-10 16:54:19 -0700)

are available in the git repository at:
  git://github.com/rogerq/linux.git usbhost-mfd-next

Roger Quadros (6):
      mfd: omap-usb-host: update nports in platform_data
      mfd: omap-usb-host: Remove PHY reset handling code
      mfd: omap-usb-host: Actually update hostconfig
      mfd: omap-usb-tll: move configuration code to omap_tll_init()
      mfd: omap-usb-tll: Add device tree support and binding information
      mfd: omap-usb-host: Add device tree support and binding information

 .../devicetree/bindings/mfd/omap-usb-host.txt      |   80 ++++++++
 .../devicetree/bindings/mfd/omap-usb-tll.txt       |   17 ++
 drivers/mfd/omap-usb-host.c                        |  206 ++++++++++++++-----
 drivers/mfd/omap-usb-tll.c                         |  214 ++++++++++----------
 drivers/mfd/omap-usb.h                             |    5 +-
 5 files changed, 365 insertions(+), 157 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-tll.txt

--
cheers,
-roger

[PATCH 1/6] mfd: omap-usb-host: update nports in platform_data

[Roger Quadros]

EHCI driver would need to know the number of ports available
on the platform. We set the nports parameter of platform_data
based on IP version if it was not already provided.

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
Acked-by: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
Acked-by: Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 drivers/mfd/omap-usb-host.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 6b5edf6..0874352 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -575,6 +575,7 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 			 omap->usbhs_rev, omap->nports);
 			break;
 		}
+		pdata->nports = omap->nports;
 	}
 
 	i = sizeof(struct clk *) * omap->nports;
-- 
1.7.4.1

[PATCH 2/6] mfd: omap-usb-host: Remove PHY reset handling code

[Roger Quadros]

PHY reset GPIO handling will be done in the PHY driver

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
---
 drivers/mfd/omap-usb-host.c |   47 -------------------------------------------
 1 files changed, 0 insertions(+), 47 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 0874352..502a779 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -430,24 +430,10 @@ static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
 static void omap_usbhs_init(struct device *dev)
 {
 	struct usbhs_hcd_omap		*omap = dev_get_drvdata(dev);
-	struct usbhs_omap_platform_data	*pdata = omap->pdata;
 	unsigned			reg;
 
 	dev_dbg(dev, "starting TI HSUSB Controller\n");
 
-	if (pdata->phy_reset) {
-		if (gpio_is_valid(pdata->reset_gpio_port[0]))
-			gpio_request_one(pdata->reset_gpio_port[0],
-					 GPIOF_OUT_INIT_LOW, "USB1 PHY reset");
-
-		if (gpio_is_valid(pdata->reset_gpio_port[1]))
-			gpio_request_one(pdata->reset_gpio_port[1],
-					 GPIOF_OUT_INIT_LOW, "USB2 PHY reset");
-
-		/* Hold the PHY in RESET for enough time till DIR is high */
-		udelay(10);
-	}
-
 	pm_runtime_get_sync(dev);
 
 	reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
@@ -476,37 +462,8 @@ static void omap_usbhs_init(struct device *dev)
 	dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
 
 	pm_runtime_put_sync(dev);
-	if (pdata->phy_reset) {
-		/* Hold the PHY in RESET for enough time till
-		 * PHY is settled and ready
-		 */
-		udelay(10);
-
-		if (gpio_is_valid(pdata->reset_gpio_port[0]))
-			gpio_set_value_cansleep
-				(pdata->reset_gpio_port[0], 1);
-
-		if (gpio_is_valid(pdata->reset_gpio_port[1]))
-			gpio_set_value_cansleep
-				(pdata->reset_gpio_port[1], 1);
-	}
-}
-
-static void omap_usbhs_deinit(struct device *dev)
-{
-	struct usbhs_hcd_omap		*omap = dev_get_drvdata(dev);
-	struct usbhs_omap_platform_data	*pdata = omap->pdata;
-
-	if (pdata->phy_reset) {
-		if (gpio_is_valid(pdata->reset_gpio_port[0]))
-			gpio_free(pdata->reset_gpio_port[0]);
-
-		if (gpio_is_valid(pdata->reset_gpio_port[1]))
-			gpio_free(pdata->reset_gpio_port[1]);
-	}
 }
 
-
 /**
  * usbhs_omap_probe - initialize TI-based HCDs
  *
@@ -710,8 +667,6 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 	return 0;
 
 err_alloc:
-	omap_usbhs_deinit(&pdev->dev);
-
 	for (i = 0; i < omap->nports; i++) {
 		if (!IS_ERR(omap->utmi_clk[i]))
 			clk_put(omap->utmi_clk[i]);
@@ -756,8 +711,6 @@ static int usbhs_omap_remove(struct platform_device *pdev)
 	struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev);
 	int i;
 
-	omap_usbhs_deinit(&pdev->dev);
-
 	for (i = 0; i < omap->nports; i++) {
 		if (!IS_ERR(omap->utmi_clk[i]))
 			clk_put(omap->utmi_clk[i]);
-- 
1.7.4.1

[PATCH 3/6] mfd: omap-usb-host: Actually update hostconfig

[Roger Quadros]

The helper functions omap_usbhs_rev1_hostconfig()
and omap_usbhs_rev2_hostconfig() don't write into
the hostconfig register. Make sure that we write
the return value into the hostconfig register.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 drivers/mfd/omap-usb-host.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 502a779..c3efe64 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -446,15 +446,15 @@ static void omap_usbhs_init(struct device *dev)
 
 	switch (omap->usbhs_rev) {
 	case OMAP_USBHS_REV1:
-		omap_usbhs_rev1_hostconfig(omap, reg);
+		reg = omap_usbhs_rev1_hostconfig(omap, reg);
 		break;
 
 	case OMAP_USBHS_REV2:
-		omap_usbhs_rev2_hostconfig(omap, reg);
+		reg = omap_usbhs_rev2_hostconfig(omap, reg);
 		break;
 
 	default:	/* newer revisions */
-		omap_usbhs_rev2_hostconfig(omap, reg);
+		reg = omap_usbhs_rev2_hostconfig(omap, reg);
 		break;
 	}
 
-- 
1.7.4.1

[PATCH 4/6] mfd: omap-usb-tll: move configuration code to omap_tll_init()

[Roger Quadros]

This is because we want to get rid of platform_data usage from probe().
The only information we need is PORT_MODE, and this can be supplied
to us by the user (i.e. omap-usb-host.c).

We also move channel clock management from runtime PM handlers into
omap_tll_enable/disable().

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 drivers/mfd/omap-usb-host.c |    7 +-
 drivers/mfd/omap-usb-tll.c  |  204 +++++++++++++++++++++----------------------
 drivers/mfd/omap-usb.h      |    5 +-
 3 files changed, 107 insertions(+), 109 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index c3efe64..138ee98 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -278,7 +278,7 @@ static int usbhs_runtime_resume(struct device *dev)
 
 	dev_dbg(dev, "usbhs_runtime_resume\n");
 
-	omap_tll_enable();
+	omap_tll_enable(pdata);
 
 	if (!IS_ERR(omap->ehci_logic_fck))
 		clk_enable(omap->ehci_logic_fck);
@@ -353,7 +353,7 @@ static int usbhs_runtime_suspend(struct device *dev)
 	if (!IS_ERR(omap->ehci_logic_fck))
 		clk_disable(omap->ehci_logic_fck);
 
-	omap_tll_disable();
+	omap_tll_disable(pdata);
 
 	return 0;
 }
@@ -499,6 +499,9 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 
 	omap->pdata = pdata;
 
+	/* Initialize the TLL subsystem */
+	omap_tll_init(pdata);
+
 	pm_runtime_enable(dev);
 
 	platform_set_drvdata(pdev, omap);
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index 0aef1a7..f7d2568 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -1,8 +1,9 @@
 /**
  * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
  *
- * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com
  * Author: Keshava Munegowda <keshava_mgowda@ti.com>
+ * Author: Roger Quadros <rogerq@ti.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2  of
@@ -105,8 +106,8 @@
 
 struct usbtll_omap {
 	int					nch;	/* num. of channels */
-	struct usbhs_omap_platform_data		*pdata;
 	struct clk				**ch_clk;
+	void __iomem				*base;
 };
 
 /*-------------------------------------------------------------------------*/
@@ -210,14 +211,10 @@ static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
 static int usbtll_omap_probe(struct platform_device *pdev)
 {
 	struct device				*dev =  &pdev->dev;
-	struct usbhs_omap_platform_data		*pdata = dev->platform_data;
-	void __iomem				*base;
 	struct resource				*res;
 	struct usbtll_omap			*tll;
-	unsigned				reg;
 	int					ret = 0;
 	int					i, ver;
-	bool needs_tll;
 
 	dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
 
@@ -227,16 +224,9 @@ static int usbtll_omap_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	if (!pdata) {
-		dev_err(dev, "Platform data missing\n");
-		return -ENODEV;
-	}
-
-	tll->pdata = pdata;
-
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_request_and_ioremap(dev, res);
-	if (!base) {
+	tll->base = devm_request_and_ioremap(dev, res);
+	if (!tll->base) {
 		ret = -EADDRNOTAVAIL;
 		dev_err(dev, "Resource request/ioremap failed:%d\n", ret);
 		return ret;
@@ -246,7 +236,7 @@ static int usbtll_omap_probe(struct platform_device *pdev)
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
-	ver =  usbtll_read(base, OMAP_USBTLL_REVISION);
+	ver =  usbtll_read(tll->base, OMAP_USBTLL_REVISION);
 	switch (ver) {
 	case OMAP_USBTLL_REV1:
 	case OMAP_USBTLL_REV4:
@@ -283,11 +273,77 @@ static int usbtll_omap_probe(struct platform_device *pdev)
 			dev_dbg(dev, "can't get clock : %s\n", clkname);
 	}
 
+	pm_runtime_put_sync(dev);
+	/* only after this can omap_tll_enable/disable work */
+	spin_lock(&tll_lock);
+	tll_dev = dev;
+	spin_unlock(&tll_lock);
+
+	return 0;
+
+err_clk_alloc:
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
+	return ret;
+}
+
+/**
+ * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
+ * @pdev: USB Host Controller being removed
+ *
+ * Reverses the effect of usbtll_omap_probe().
+ */
+static int usbtll_omap_remove(struct platform_device *pdev)
+{
+	struct usbtll_omap *tll = platform_get_drvdata(pdev);
+	int i;
+
+	spin_lock(&tll_lock);
+	tll_dev = NULL;
+	spin_unlock(&tll_lock);
+
+	for (i = 0; i < tll->nch; i++)
+		if (!IS_ERR(tll->ch_clk[i]))
+			clk_put(tll->ch_clk[i]);
+
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver usbtll_omap_driver = {
+	.driver = {
+		.name		= (char *)usbtll_driver_name,
+		.owner		= THIS_MODULE,
+	},
+	.probe		= usbtll_omap_probe,
+	.remove		= usbtll_omap_remove,
+};
+
+int omap_tll_init(struct usbhs_omap_platform_data *pdata)
+{
+	int i;
+	bool needs_tll;
+	unsigned reg;
+	struct usbtll_omap *tll;
+
+	spin_lock(&tll_lock);
+
+	if (!tll_dev) {
+		spin_unlock(&tll_lock);
+		return -ENODEV;
+	}
+
+	tll = dev_get_drvdata(tll_dev);
+
 	needs_tll = false;
 	for (i = 0; i < tll->nch; i++)
 		needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
 
+	pm_runtime_get_sync(tll_dev);
+
 	if (needs_tll) {
+		void __iomem *base = tll->base;
 
 		/* Program Common TLL register */
 		reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
@@ -336,51 +392,29 @@ static int usbtll_omap_probe(struct platform_device *pdev)
 		}
 	}
 
-	pm_runtime_put_sync(dev);
-	/* only after this can omap_tll_enable/disable work */
-	spin_lock(&tll_lock);
-	tll_dev = dev;
+	pm_runtime_put_sync(tll_dev);
+
 	spin_unlock(&tll_lock);
 
 	return 0;
-
-err_clk_alloc:
-	pm_runtime_put_sync(dev);
-	pm_runtime_disable(dev);
-
-	return ret;
 }
+EXPORT_SYMBOL_GPL(omap_tll_init);
 
-/**
- * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
- * @pdev: USB Host Controller being removed
- *
- * Reverses the effect of usbtll_omap_probe().
- */
-static int usbtll_omap_remove(struct platform_device *pdev)
+int omap_tll_enable(struct usbhs_omap_platform_data *pdata)
 {
-	struct usbtll_omap *tll = platform_get_drvdata(pdev);
 	int i;
+	struct usbtll_omap *tll;
 
 	spin_lock(&tll_lock);
-	tll_dev = NULL;
-	spin_unlock(&tll_lock);
-
-	for (i = 0; i < tll->nch; i++)
-		if (!IS_ERR(tll->ch_clk[i]))
-			clk_put(tll->ch_clk[i]);
 
-	pm_runtime_disable(&pdev->dev);
-	return 0;
-}
+	if (!tll_dev) {
+		spin_unlock(&tll_lock);
+		return -ENODEV;
+	}
 
-static int usbtll_runtime_resume(struct device *dev)
-{
-	struct usbtll_omap			*tll = dev_get_drvdata(dev);
-	struct usbhs_omap_platform_data		*pdata = tll->pdata;
-	int i;
+	tll = dev_get_drvdata(tll_dev);
 
-	dev_dbg(dev, "usbtll_runtime_resume\n");
+	pm_runtime_get_sync(tll_dev);
 
 	for (i = 0; i < tll->nch; i++) {
 		if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
@@ -391,22 +425,31 @@ static int usbtll_runtime_resume(struct device *dev)
 
 			r = clk_enable(tll->ch_clk[i]);
 			if (r) {
-				dev_err(dev,
+				dev_err(tll_dev,
 				 "Error enabling ch %d clock: %d\n", i, r);
 			}
 		}
 	}
 
+	spin_unlock(&tll_lock);
+
 	return 0;
 }
+EXPORT_SYMBOL_GPL(omap_tll_enable);
 
-static int usbtll_runtime_suspend(struct device *dev)
+int omap_tll_disable(struct usbhs_omap_platform_data *pdata)
 {
-	struct usbtll_omap			*tll = dev_get_drvdata(dev);
-	struct usbhs_omap_platform_data		*pdata = tll->pdata;
 	int i;
+	struct usbtll_omap *tll;
+
+	spin_lock(&tll_lock);
+
+	if (!tll_dev) {
+		spin_unlock(&tll_lock);
+		return -ENODEV;
+	}
 
-	dev_dbg(dev, "usbtll_runtime_suspend\n");
+	tll = dev_get_drvdata(tll_dev);
 
 	for (i = 0; i < tll->nch; i++) {
 		if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
@@ -415,60 +458,11 @@ static int usbtll_runtime_suspend(struct device *dev)
 		}
 	}
 
-	return 0;
-}
-
-static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
-	SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
-			   usbtll_runtime_resume,
-			   NULL)
-};
-
-static struct platform_driver usbtll_omap_driver = {
-	.driver = {
-		.name		= (char *)usbtll_driver_name,
-		.owner		= THIS_MODULE,
-		.pm		= &usbtllomap_dev_pm_ops,
-	},
-	.probe		= usbtll_omap_probe,
-	.remove		= usbtll_omap_remove,
-};
-
-int omap_tll_enable(void)
-{
-	int ret;
-
-	spin_lock(&tll_lock);
-
-	if (!tll_dev) {
-		pr_err("%s: OMAP USB TLL not initialized\n", __func__);
-		ret = -ENODEV;
-	} else {
-		ret = pm_runtime_get_sync(tll_dev);
-	}
+	pm_runtime_put_sync(tll_dev);
 
 	spin_unlock(&tll_lock);
 
-	return ret;
-}
-EXPORT_SYMBOL_GPL(omap_tll_enable);
-
-int omap_tll_disable(void)
-{
-	int ret;
-
-	spin_lock(&tll_lock);
-
-	if (!tll_dev) {
-		pr_err("%s: OMAP USB TLL not initialized\n", __func__);
-		ret = -ENODEV;
-	} else {
-		ret = pm_runtime_put_sync(tll_dev);
-	}
-
-	spin_unlock(&tll_lock);
-
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(omap_tll_disable);
 
diff --git a/drivers/mfd/omap-usb.h b/drivers/mfd/omap-usb.h
index 972aa96..2a508b6 100644
--- a/drivers/mfd/omap-usb.h
+++ b/drivers/mfd/omap-usb.h
@@ -1,2 +1,3 @@
-extern int omap_tll_enable(void);
-extern int omap_tll_disable(void);
+extern int omap_tll_init(struct usbhs_omap_platform_data *pdata);
+extern int omap_tll_enable(struct usbhs_omap_platform_data *pdata);
+extern int omap_tll_disable(struct usbhs_omap_platform_data *pdata);
-- 
1.7.4.1

[PATCH 5/6] mfd: omap-usb-tll: Add device tree support and binding information

[Roger Quadros]

Allows the OMAP USB TLL module to be specified via device tree.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 .../devicetree/bindings/mfd/omap-usb-tll.txt       |   17 +++++++++++++++++
 drivers/mfd/omap-usb-tll.c                         |   10 ++++++++++
 2 files changed, 27 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-tll.txt

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt b/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
new file mode 100644
index 0000000..62fe697
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
@@ -0,0 +1,17 @@
+OMAP HS USB Host TLL (Transceiver-Less Interface)
+
+Required properties:
+
+- compatible : should be "ti,usbhs-tll"
+- reg : should contain one register range i.e. start and length
+- interrupts : should contain the TLL module's interrupt
+- ti,hwmod : must contain "usb_tll_hs"
+
+Example:
+
+	usbhstll: usbhstll@4a062000 {
+		compatible = "ti,usbhs-tll";
+		reg = <0x4a062000 0x1000>;
+		interrupts = <78>;
+		ti,hwmods = "usb_tll_hs";
+	  };
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index f7d2568..8f4d5a1 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -28,6 +28,7 @@
 #include <linux/err.h>
 #include <linux/pm_runtime.h>
 #include <linux/platform_data/usb-omap.h>
+#include <linux/of.h>
 
 #define USBTLL_DRIVER_NAME	"usbhs_tll"
 
@@ -311,10 +312,18 @@ static int usbtll_omap_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id usbtll_omap_dt_ids[] = {
+	{ .compatible = "ti,usbhs-tll" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids);
+
 static struct platform_driver usbtll_omap_driver = {
 	.driver = {
 		.name		= (char *)usbtll_driver_name,
 		.owner		= THIS_MODULE,
+		.of_match_table = of_match_ptr(usbtll_omap_dt_ids),
 	},
 	.probe		= usbtll_omap_probe,
 	.remove		= usbtll_omap_remove,
@@ -467,6 +476,7 @@ int omap_tll_disable(struct usbhs_omap_platform_data *pdata)
 EXPORT_SYMBOL_GPL(omap_tll_disable);
 
 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
-- 
1.7.4.1

[PATCH 6/6] mfd: omap-usb-host: Add device tree support and binding information

[Roger Quadros]

Allows the OMAP HS USB host controller to be specified
via device tree.

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
Reviewed-by: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
---
 .../devicetree/bindings/mfd/omap-usb-host.txt      |   80 ++++++++++
 drivers/mfd/omap-usb-host.c                        |  161 +++++++++++++++++++-
 2 files changed, 235 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
new file mode 100644
index 0000000..b381fa6
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
@@ -0,0 +1,80 @@
+OMAP HS USB Host
+
+Required properties:
+
+- compatible: should be "ti,usbhs-host"
+- reg: should contain one register range i.e. start and length
+- ti,hwmods: must contain "usb_host_hs"
+
+Optional properties:
+
+- num-ports: number of USB ports. Usually this is automatically detected
+  from the IP's revision register but can be overridden by specifying
+  this property. A maximum of 3 ports are supported at the moment.
+
+- portN-mode: String specifying the port mode for port N, where N can be
+  from 1 to 3. If the port mode is not specified, that port is treated
+  as unused. When specified, it must be one of the following.
+	"ehci-phy",
+        "ehci-tll",
+        "ehci-hsic",
+        "ohci-phy-6pin-datse0",
+        "ohci-phy-6pin-dpdm",
+        "ohci-phy-3pin-datse0",
+        "ohci-phy-4pin-dpdm",
+        "ohci-tll-6pin-datse0",
+        "ohci-tll-6pin-dpdm",
+        "ohci-tll-3pin-datse0",
+        "ohci-tll-4pin-dpdm",
+        "ohci-tll-2pin-datse0",
+        "ohci-tll-2pin-dpdm",
+
+- single-ulpi-bypass: Must be present if the controller contains a single
+  ULPI bypass control bit. e.g. OMAP3 silicon <= ES2.1
+
+Required properties if child node exists:
+
+- #address-cells: Must be 1
+- #size-cells: Must be 1
+- ranges: must be present
+
+Properties for children:
+
+The OMAP HS USB Host subsystem contains EHCI and OHCI controllers.
+See Documentation/devicetree/bindings/usb/omap-ehci.txt and
+omap3-ohci.txt
+
+Example for OMAP4:
+
+usbhshost: usbhshost@4a064000 {
+	compatible = "ti,usbhs-host";
+	reg = <0x4a064000 0x800>;
+	ti,hwmods = "usb_host_hs";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	ranges;
+
+	usbhsohci: ohci@4a064800 {
+		compatible = "ti,ohci-omap3", "usb-ohci";
+		reg = <0x4a064800 0x400>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 76 0x4>;
+	};
+
+	usbhsehci: ehci@4a064c00 {
+		compatible = "ti,ehci-omap", "usb-ehci";
+		reg = <0x4a064c00 0x400>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 77 0x4>;
+	};
+};
+
+&usbhshost {
+	port1-mode = "ehci-phy";
+	port2-mode = "ehci-tll";
+	port3-mode = "ehci-phy";
+};
+
+&usbhsehci {
+	phys = <&hsusb1_phy 0 &hsusb3_phy>;
+};
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 138ee98..d3b6e94 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -1,8 +1,9 @@
 /**
  * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI
  *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com
  * Author: Keshava Munegowda <keshava_mgowda-l0cyMroinI0@public.gmane.org>
+ * Author: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2  of
@@ -27,6 +28,8 @@
 #include <linux/platform_device.h>
 #include <linux/platform_data/usb-omap.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 
 #include "omap-usb.h"
 
@@ -137,6 +140,49 @@ static inline u8 usbhs_readb(void __iomem *base, u8 reg)
 
 /*-------------------------------------------------------------------------*/
 
+/**
+ * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
+ * to the device tree binding portN-mode found in
+ * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
+ */
+static const char * const port_modes[] = {
+	[OMAP_USBHS_PORT_MODE_UNUSED]	= "",
+	[OMAP_EHCI_PORT_MODE_PHY]	= "ehci-phy",
+	[OMAP_EHCI_PORT_MODE_TLL]	= "ehci-tll",
+	[OMAP_EHCI_PORT_MODE_HSIC]	= "ehci-hsic",
+	[OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0]	= "ohci-phy-6pin-datse0",
+	[OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM]	= "ohci-phy-6pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0]	= "ohci-phy-3pin-datse0",
+	[OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM]	= "ohci-phy-4pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0]	= "ohci-tll-6pin-datse0",
+	[OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM]	= "ohci-tll-6pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0]	= "ohci-tll-3pin-datse0",
+	[OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM]	= "ohci-tll-4pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0]	= "ohci-tll-2pin-datse0",
+	[OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM]	= "ohci-tll-2pin-dpdm",
+};
+
+/**
+ * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
+ * from the port mode string.
+ * @mode: The port mode string, usually obtained from device tree.
+ *
+ * The function returns the 'enum usbhs_omap_port_mode' that matches the
+ * provided port mode string as per the port_modes table.
+ * If no match is found it returns -ENODEV
+ */
+static const int omap_usbhs_get_dt_port_mode(const char *mode)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
+		if (!strcmp(mode, port_modes[i]))
+			return i;
+	}
+
+	return -ENODEV;
+}
+
 static struct platform_device *omap_usbhs_alloc_child(const char *name,
 			struct resource	*res, int num_resources, void *pdata,
 			size_t pdata_size, struct device *dev)
@@ -464,6 +510,58 @@ static void omap_usbhs_init(struct device *dev)
 	pm_runtime_put_sync(dev);
 }
 
+static int usbhs_omap_get_dt_pdata(struct device *dev,
+					struct usbhs_omap_platform_data *pdata)
+{
+	int ret, i;
+	struct device_node *node = dev->of_node;
+
+	ret = of_property_read_u32(node, "num-ports", &pdata->nports);
+	if (ret)
+		pdata->nports = 0;
+
+	if (pdata->nports > OMAP3_HS_USB_PORTS) {
+		dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
+				pdata->nports, OMAP3_HS_USB_PORTS);
+		return -ENODEV;
+	}
+
+	/* get port modes */
+	for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
+		char prop[11];
+		const char *mode;
+
+		pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
+
+		snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
+		ret = of_property_read_string(node, prop, &mode);
+		if (ret < 0)
+			continue;
+
+		ret = omap_usbhs_get_dt_port_mode(mode);
+		if (ret < 0) {
+			dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
+					i, mode);
+			return -ENODEV;
+		}
+
+		dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
+		pdata->port_mode[i] = ret;
+	}
+
+	/* get flags */
+	pdata->single_ulpi_bypass = of_property_read_bool(node,
+						"single-ulpi-bypass");
+
+	return 0;
+}
+
+static struct of_device_id usbhs_child_match_table[] = {
+	{ .compatible = "ti,omap-ehci", },
+	{ .compatible = "ti,omap-ohci", },
+	{ }
+};
+
 /**
  * usbhs_omap_probe - initialize TI-based HCDs
  *
@@ -479,18 +577,37 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 	int				i;
 	bool				need_logic_fck;
 
+	if (dev->of_node) {
+		/* For DT boot we populate platform data from OF node */
+		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+		if (!pdata)
+			return -ENOMEM;
+
+		ret = usbhs_omap_get_dt_pdata(dev, pdata);
+		if (ret)
+			return ret;
+
+		dev->platform_data = pdata;
+	}
+
 	if (!pdata) {
 		dev_err(dev, "Missing platform data\n");
 		return -ENODEV;
 	}
 
+	if (pdata->nports > OMAP3_HS_USB_PORTS) {
+		dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
+				pdata->nports, OMAP3_HS_USB_PORTS);
+		return -ENODEV;
+	}
+
 	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
 	if (!omap) {
 		dev_err(dev, "Memory allocation failed\n");
 		return -ENOMEM;
 	}
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "uhh");
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	omap->uhh_base = devm_request_and_ioremap(dev, res);
 	if (!omap->uhh_base) {
 		dev_err(dev, "Resource request/ioremap failed\n");
@@ -661,10 +778,23 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 	}
 
 	omap_usbhs_init(dev);
-	ret = omap_usbhs_alloc_children(pdev);
-	if (ret) {
-		dev_err(dev, "omap_usbhs_alloc_children failed\n");
-		goto err_alloc;
+
+	if (dev->of_node) {
+		ret = of_platform_populate(dev->of_node,
+				usbhs_child_match_table, NULL, dev);
+
+		if (ret) {
+			dev_err(dev, "Failed to create DT children: %d\n", ret);
+			goto err_alloc;
+		}
+
+	} else {
+		ret = omap_usbhs_alloc_children(pdev);
+		if (ret) {
+			dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
+						ret);
+			goto err_alloc;
+		}
 	}
 
 	return 0;
@@ -703,6 +833,13 @@ err_mem:
 	return ret;
 }
 
+static int usbhs_omap_remove_child(struct device *dev, void *data)
+{
+	dev_info(dev, "unregistering\n");
+	platform_device_unregister(to_platform_device(dev));
+	return 0;
+}
+
 /**
  * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
  * @pdev: USB Host Controller being removed
@@ -734,6 +871,8 @@ static int usbhs_omap_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
+	/* remove children */
+	device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
 	return 0;
 }
 
@@ -742,16 +881,26 @@ static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
 	.runtime_resume		= usbhs_runtime_resume,
 };
 
+static const struct of_device_id usbhs_omap_dt_ids[] = {
+	{ .compatible = "ti,usbhs-host" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
+
+
 static struct platform_driver usbhs_omap_driver = {
 	.driver = {
 		.name		= (char *)usbhs_driver_name,
 		.owner		= THIS_MODULE,
 		.pm		= &usbhsomap_dev_pm_ops,
+		.of_match_table = of_match_ptr(usbhs_omap_dt_ids),
 	},
 	.remove		= usbhs_omap_remove,
 };
 
 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda-l0cyMroinI0@public.gmane.org>");
+MODULE_AUTHOR("Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>");
 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
-- 
1.7.4.1

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 3/6] mfd: omap-usb-host: Actually update hostconfig

[Felipe Balbi]

[-- Attachment #1.1: Type: text/plain, Size: 442 bytes --]

On Tue, Mar 12, 2013 at 12:25:37PM +0200, Roger Quadros wrote:
> The helper functions omap_usbhs_rev1_hostconfig()
> and omap_usbhs_rev2_hostconfig() don't write into
> the hostconfig register. Make sure that we write
> the return value into the hostconfig register.
> 
> Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>

makes sense :-)

Acked-by: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>

-- 
balbi

[-- Attachment #1.2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]

[-- Attachment #2: Type: text/plain, Size: 192 bytes --]

_______________________________________________
devicetree-discuss mailing list
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
https://lists.ozlabs.org/listinfo/devicetree-discuss

Re: [PATCH 0/6] mfd: omap-usb-host: Device tree support for 3.10

[Roger Quadros]

Hi Samuel,

I've rebased this now on top of 3.9-rc4. Please pull this into your
next branch when appropriate. Thanks.

The following changes since commit 8bb9660418e05bb1845ac1a2428444d78e322cc7:

  Linux 3.9-rc4 (2013-03-23 16:52:44 -0700)

are available in the git repository at:
  git://github.com/rogerq/linux.git usbhost-mfd-next

Roger Quadros (5):
      mfd: omap-usb-host: update nports in platform_data
      mfd: omap-usb-host: Remove PHY reset handling code
      mfd: omap-usb-tll: move configuration code to omap_tll_init()
      mfd: omap-usb-tll: Add device tree support and binding information
      mfd: omap-usb-host: Add device tree support and binding information

 .../devicetree/bindings/mfd/omap-usb-host.txt      |   80 ++++++++
 .../devicetree/bindings/mfd/omap-usb-tll.txt       |   17 ++
 drivers/mfd/omap-usb-host.c                        |  200 ++++++++++++++-----
 drivers/mfd/omap-usb-tll.c                         |  214 ++++++++++----------
 drivers/mfd/omap-usb.h                             |    5 +-
 5 files changed, 362 insertions(+), 154 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-tll.txt

cheers,
-roger

On 03/12/2013 12:25 PM, Roger Quadros wrote:
> Hi Samuel,
> 
> These patches implement device tree support for the OMAP High Speed
> USB Host subsystem. The corresponding EHCI & SoC patches will be sent
> separately and this set has no build dependencies with them.
> 
> Patch 3 is acutally a bug fix which should go into 3.9-rc. I've sent
> it separately to you before.
> 
> The following changes since commit f6161aa153581da4a3867a2d1a7caf4be19b6ec9:
> 
>   Linux 3.9-rc2 (2013-03-10 16:54:19 -0700)
> 
> are available in the git repository at:
>   git://github.com/rogerq/linux.git usbhost-mfd-next
> 
> Roger Quadros (6):
>       mfd: omap-usb-host: update nports in platform_data
>       mfd: omap-usb-host: Remove PHY reset handling code
>       mfd: omap-usb-host: Actually update hostconfig
>       mfd: omap-usb-tll: move configuration code to omap_tll_init()
>       mfd: omap-usb-tll: Add device tree support and binding information
>       mfd: omap-usb-host: Add device tree support and binding information
> 
>  .../devicetree/bindings/mfd/omap-usb-host.txt      |   80 ++++++++
>  .../devicetree/bindings/mfd/omap-usb-tll.txt       |   17 ++
>  drivers/mfd/omap-usb-host.c                        |  206 ++++++++++++++-----
>  drivers/mfd/omap-usb-tll.c                         |  214 ++++++++++----------
>  drivers/mfd/omap-usb.h                             |    5 +-
>  5 files changed, 365 insertions(+), 157 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt
>  create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
> 
> --
> cheers,
> -roger
> 

Re: [PATCH 0/6] mfd: omap-usb-host: Device tree support for 3.10

[Samuel Ortiz]

Hi Roger,

On Mon, Mar 25, 2013 at 12:42:04PM +0200, Roger Quadros wrote:
> Hi Samuel,
> 
> I've rebased this now on top of 3.9-rc4. Please pull this into your
> next branch when appropriate. Thanks.
> 
> The following changes since commit 8bb9660418e05bb1845ac1a2428444d78e322cc7:
> 
>   Linux 3.9-rc4 (2013-03-23 16:52:44 -0700)
> 
> are available in the git repository at:
>   git://github.com/rogerq/linux.git usbhost-mfd-next
> 
> Roger Quadros (5):
>       mfd: omap-usb-host: update nports in platform_data
>       mfd: omap-usb-host: Remove PHY reset handling code
>       mfd: omap-usb-tll: move configuration code to omap_tll_init()
>       mfd: omap-usb-tll: Add device tree support and binding information
>       mfd: omap-usb-host: Add device tree support and binding information
I had to apply them manually, as patches #2 and #5 do not apply.
I am pushing #1, #3 and #4, please rebase 2 and 5 on top of mfd-next and
resend them to me.

Cheers,
Samuel.

-- 
Intel Open Source Technology Centre
http://oss.intel.com/

Re: [PATCH 0/6] mfd: omap-usb-host: Device tree support for 3.10

[Roger Quadros]

Samuel,

You had the conflicts because a patch [*] was introduced and is not
required since the reset logic is being removed from the driver.

Anyways, I've rebased the 2 patches on top of mfd-next, so now it
shouldn't matter.

cheers,
-roger

[*]
commit 71f4b9cdfccfb82cff702fe61f4ace97a1dfb0e0
Author: Jingoo Han <jg1.han-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Date:   Wed Feb 20 18:29:30 2013 +0900

    mfd: omap-usb-host: Use devm_gpio_request_one()

[PATCH 1/2] mfd: omap-usb-host: Remove PHY reset handling code

[Roger Quadros]

PHY reset GPIO handling will be done in the PHY driver

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
Acked-by: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
Acked-by: Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 drivers/mfd/omap-usb-host.c |   28 ----------------------------
 1 files changed, 0 insertions(+), 28 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index eb5db28..138ee98 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -430,24 +430,10 @@ static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
 static void omap_usbhs_init(struct device *dev)
 {
 	struct usbhs_hcd_omap		*omap = dev_get_drvdata(dev);
-	struct usbhs_omap_platform_data	*pdata = omap->pdata;
 	unsigned			reg;
 
 	dev_dbg(dev, "starting TI HSUSB Controller\n");
 
-	if (pdata->phy_reset) {
-		if (gpio_is_valid(pdata->reset_gpio_port[0]))
-			devm_gpio_request_one(dev, pdata->reset_gpio_port[0],
-					 GPIOF_OUT_INIT_LOW, "USB1 PHY reset");
-
-		if (gpio_is_valid(pdata->reset_gpio_port[1]))
-			devm_gpio_request_one(dev, pdata->reset_gpio_port[1],
-					 GPIOF_OUT_INIT_LOW, "USB2 PHY reset");
-
-		/* Hold the PHY in RESET for enough time till DIR is high */
-		udelay(10);
-	}
-
 	pm_runtime_get_sync(dev);
 
 	reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
@@ -476,20 +462,6 @@ static void omap_usbhs_init(struct device *dev)
 	dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
 
 	pm_runtime_put_sync(dev);
-	if (pdata->phy_reset) {
-		/* Hold the PHY in RESET for enough time till
-		 * PHY is settled and ready
-		 */
-		udelay(10);
-
-		if (gpio_is_valid(pdata->reset_gpio_port[0]))
-			gpio_set_value_cansleep
-				(pdata->reset_gpio_port[0], 1);

[PATCH 2/2] mfd: omap-usb-host: Add device tree support and binding information

[Roger Quadros]

Allows the OMAP HS USB host controller to be specified
via device tree.

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
Reviewed-by: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
---
 .../devicetree/bindings/mfd/omap-usb-host.txt      |   80 ++++++++++
 drivers/mfd/omap-usb-host.c                        |  161 +++++++++++++++++++-
 2 files changed, 235 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
new file mode 100644
index 0000000..b381fa6
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
@@ -0,0 +1,80 @@
+OMAP HS USB Host
+
+Required properties:
+
+- compatible: should be "ti,usbhs-host"
+- reg: should contain one register range i.e. start and length
+- ti,hwmods: must contain "usb_host_hs"
+
+Optional properties:
+
+- num-ports: number of USB ports. Usually this is automatically detected
+  from the IP's revision register but can be overridden by specifying
+  this property. A maximum of 3 ports are supported at the moment.
+
+- portN-mode: String specifying the port mode for port N, where N can be
+  from 1 to 3. If the port mode is not specified, that port is treated
+  as unused. When specified, it must be one of the following.
+	"ehci-phy",
+        "ehci-tll",
+        "ehci-hsic",
+        "ohci-phy-6pin-datse0",
+        "ohci-phy-6pin-dpdm",
+        "ohci-phy-3pin-datse0",
+        "ohci-phy-4pin-dpdm",
+        "ohci-tll-6pin-datse0",
+        "ohci-tll-6pin-dpdm",
+        "ohci-tll-3pin-datse0",
+        "ohci-tll-4pin-dpdm",
+        "ohci-tll-2pin-datse0",
+        "ohci-tll-2pin-dpdm",
+
+- single-ulpi-bypass: Must be present if the controller contains a single
+  ULPI bypass control bit. e.g. OMAP3 silicon <= ES2.1
+
+Required properties if child node exists:
+
+- #address-cells: Must be 1
+- #size-cells: Must be 1
+- ranges: must be present
+
+Properties for children:
+
+The OMAP HS USB Host subsystem contains EHCI and OHCI controllers.
+See Documentation/devicetree/bindings/usb/omap-ehci.txt and
+omap3-ohci.txt
+
+Example for OMAP4:
+
+usbhshost: usbhshost@4a064000 {
+	compatible = "ti,usbhs-host";
+	reg = <0x4a064000 0x800>;
+	ti,hwmods = "usb_host_hs";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	ranges;
+
+	usbhsohci: ohci@4a064800 {
+		compatible = "ti,ohci-omap3", "usb-ohci";
+		reg = <0x4a064800 0x400>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 76 0x4>;
+	};
+
+	usbhsehci: ehci@4a064c00 {
+		compatible = "ti,ehci-omap", "usb-ehci";
+		reg = <0x4a064c00 0x400>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 77 0x4>;
+	};
+};
+
+&usbhshost {
+	port1-mode = "ehci-phy";
+	port2-mode = "ehci-tll";
+	port3-mode = "ehci-phy";
+};
+
+&usbhsehci {
+	phys = <&hsusb1_phy 0 &hsusb3_phy>;
+};
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 138ee98..d3b6e94 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -1,8 +1,9 @@
 /**
  * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI
  *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com
  * Author: Keshava Munegowda <keshava_mgowda-l0cyMroinI0@public.gmane.org>
+ * Author: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2  of
@@ -27,6 +28,8 @@
 #include <linux/platform_device.h>
 #include <linux/platform_data/usb-omap.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 
 #include "omap-usb.h"
 
@@ -137,6 +140,49 @@ static inline u8 usbhs_readb(void __iomem *base, u8 reg)
 
 /*-------------------------------------------------------------------------*/
 
+/**
+ * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
+ * to the device tree binding portN-mode found in
+ * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
+ */
+static const char * const port_modes[] = {
+	[OMAP_USBHS_PORT_MODE_UNUSED]	= "",
+	[OMAP_EHCI_PORT_MODE_PHY]	= "ehci-phy",
+	[OMAP_EHCI_PORT_MODE_TLL]	= "ehci-tll",
+	[OMAP_EHCI_PORT_MODE_HSIC]	= "ehci-hsic",
+	[OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0]	= "ohci-phy-6pin-datse0",
+	[OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM]	= "ohci-phy-6pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0]	= "ohci-phy-3pin-datse0",
+	[OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM]	= "ohci-phy-4pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0]	= "ohci-tll-6pin-datse0",
+	[OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM]	= "ohci-tll-6pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0]	= "ohci-tll-3pin-datse0",
+	[OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM]	= "ohci-tll-4pin-dpdm",
+	[OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0]	= "ohci-tll-2pin-datse0",
+	[OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM]	= "ohci-tll-2pin-dpdm",
+};
+
+/**
+ * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
+ * from the port mode string.
+ * @mode: The port mode string, usually obtained from device tree.
+ *
+ * The function returns the 'enum usbhs_omap_port_mode' that matches the
+ * provided port mode string as per the port_modes table.
+ * If no match is found it returns -ENODEV
+ */
+static const int omap_usbhs_get_dt_port_mode(const char *mode)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
+		if (!strcmp(mode, port_modes[i]))
+			return i;
+	}
+
+	return -ENODEV;
+}
+
 static struct platform_device *omap_usbhs_alloc_child(const char *name,
 			struct resource	*res, int num_resources, void *pdata,
 			size_t pdata_size, struct device *dev)
@@ -464,6 +510,58 @@ static void omap_usbhs_init(struct device *dev)
 	pm_runtime_put_sync(dev);
 }
 
+static int usbhs_omap_get_dt_pdata(struct device *dev,
+					struct usbhs_omap_platform_data *pdata)
+{
+	int ret, i;
+	struct device_node *node = dev->of_node;
+
+	ret = of_property_read_u32(node, "num-ports", &pdata->nports);
+	if (ret)
+		pdata->nports = 0;
+
+	if (pdata->nports > OMAP3_HS_USB_PORTS) {
+		dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
+				pdata->nports, OMAP3_HS_USB_PORTS);
+		return -ENODEV;
+	}
+
+	/* get port modes */
+	for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
+		char prop[11];
+		const char *mode;
+
+		pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
+
+		snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
+		ret = of_property_read_string(node, prop, &mode);
+		if (ret < 0)
+			continue;
+
+		ret = omap_usbhs_get_dt_port_mode(mode);
+		if (ret < 0) {
+			dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
+					i, mode);
+			return -ENODEV;
+		}
+
+		dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
+		pdata->port_mode[i] = ret;
+	}
+
+	/* get flags */
+	pdata->single_ulpi_bypass = of_property_read_bool(node,
+						"single-ulpi-bypass");
+
+	return 0;
+}
+
+static struct of_device_id usbhs_child_match_table[] = {
+	{ .compatible = "ti,omap-ehci", },
+	{ .compatible = "ti,omap-ohci", },
+	{ }
+};
+
 /**
  * usbhs_omap_probe - initialize TI-based HCDs
  *
@@ -479,18 +577,37 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 	int				i;
 	bool				need_logic_fck;
 
+	if (dev->of_node) {
+		/* For DT boot we populate platform data from OF node */
+		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+		if (!pdata)
+			return -ENOMEM;
+
+		ret = usbhs_omap_get_dt_pdata(dev, pdata);
+		if (ret)
+			return ret;
+
+		dev->platform_data = pdata;
+	}
+
 	if (!pdata) {
 		dev_err(dev, "Missing platform data\n");
 		return -ENODEV;
 	}
 
+	if (pdata->nports > OMAP3_HS_USB_PORTS) {
+		dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
+				pdata->nports, OMAP3_HS_USB_PORTS);
+		return -ENODEV;
+	}
+
 	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
 	if (!omap) {
 		dev_err(dev, "Memory allocation failed\n");
 		return -ENOMEM;
 	}
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "uhh");
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	omap->uhh_base = devm_request_and_ioremap(dev, res);
 	if (!omap->uhh_base) {
 		dev_err(dev, "Resource request/ioremap failed\n");
@@ -661,10 +778,23 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 	}
 
 	omap_usbhs_init(dev);
-	ret = omap_usbhs_alloc_children(pdev);
-	if (ret) {
-		dev_err(dev, "omap_usbhs_alloc_children failed\n");
-		goto err_alloc;
+
+	if (dev->of_node) {
+		ret = of_platform_populate(dev->of_node,
+				usbhs_child_match_table, NULL, dev);
+
+		if (ret) {
+			dev_err(dev, "Failed to create DT children: %d\n", ret);
+			goto err_alloc;
+		}
+
+	} else {
+		ret = omap_usbhs_alloc_children(pdev);
+		if (ret) {
+			dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
+						ret);
+			goto err_alloc;
+		}
 	}
 
 	return 0;
@@ -703,6 +833,13 @@ err_mem:
 	return ret;
 }
 
+static int usbhs_omap_remove_child(struct device *dev, void *data)
+{
+	dev_info(dev, "unregistering\n");
+	platform_device_unregister(to_platform_device(dev));
+	return 0;
+}
+
 /**
  * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
  * @pdev: USB Host Controller being removed
@@ -734,6 +871,8 @@ static int usbhs_omap_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
+	/* remove children */
+	device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
 	return 0;
 }
 
@@ -742,16 +881,26 @@ static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
 	.runtime_resume		= usbhs_runtime_resume,
 };
 
+static const struct of_device_id usbhs_omap_dt_ids[] = {
+	{ .compatible = "ti,usbhs-host" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
+
+
 static struct platform_driver usbhs_omap_driver = {
 	.driver = {
 		.name		= (char *)usbhs_driver_name,
 		.owner		= THIS_MODULE,
 		.pm		= &usbhsomap_dev_pm_ops,
+		.of_match_table = of_match_ptr(usbhs_omap_dt_ids),
 	},
 	.remove		= usbhs_omap_remove,
 };
 
 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda-l0cyMroinI0@public.gmane.org>");
+MODULE_AUTHOR("Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>");
 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
-- 
1.7.4.1

Re: [PATCH 0/6] mfd: omap-usb-host: Device tree support for 3.10

[Samuel Ortiz]

On Tue, Apr 09, 2013 at 11:39:16AM +0300, Roger Quadros wrote:
> Samuel,
> 
> You had the conflicts because a patch [*] was introduced and is not
> required since the reset logic is being removed from the driver.
> 
> Anyways, I've rebased the 2 patches on top of mfd-next, so now it
> shouldn't matter.
Both patches applied, thanks a lot.

Cheers,
Samuel.

-- 
Intel Open Source Technology Centre
http://oss.intel.com/