usb: start using the control module driver

Start using the control module driver for powering on the PHY and for
writing to the mailbox instead of writing to the control module
registers on their own.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Documentation/devicetree/bindings/usb/omap-usb.txt

@@ -3,6 +3,9 @@ OMAP GLUE AND OTHER OMAP SPECIFIC COMPONENTS
 OMAP MUSB GLUE
  - compatible : Should be "ti,omap4-musb" or "ti,omap3-musb"
  - ti,hwmods : must be "usb_otg_hs"
+ - ti,has-mailbox : to specify that omap uses an external mailbox
+   (in control module) to communicate with the musb core during device connect
+   and disconnect.
  - multipoint : Should be "1" indicating the musb controller supports
    multipoint. This is a MUSB configuration-specific setting.
  - num_eps : Specifies the number of endpoints. This is also a
@@ -24,6 +27,7 @@ SOC specific device node entry
 usb_otg_hs: usb_otg_hs@4a0ab000 {
 	compatible = "ti,omap4-musb";
 	ti,hwmods = "usb_otg_hs";
+	ti,has-mailbox;
 	multipoint = <1>;
 	num_eps = <16>;
 	ram_bits = <12>;

Documentation/devicetree/bindings/usb/usb-phy.txt

@@ -4,9 +4,7 @@ OMAP USB2 PHY
 
 Required properties:
  - compatible: Should be "ti,omap-usb2"
- - reg : Address and length of the register set for the device. Also
-add the address of control module dev conf register until a driver for
-control module is added
+ - reg : Address and length of the register set for the device.
 
 Optional properties:
  - ctrl-module : phandle of the control module used by PHY driver to power on
@@ -16,7 +14,6 @@ This is usually a subnode of ocp2scp to which it is connected.
 
 usb2phy@4a0ad080 {
 	compatible = "ti,omap-usb2";
-	reg = <0x4a0ad080 0x58>,
-	      <0x4a002300 0x4>;
+	reg = <0x4a0ad080 0x58>;
 	ctrl-module = <&omap_control_usb>;
 };

drivers/usb/musb/Kconfig

@@ -11,6 +11,7 @@ config USB_MUSB_HDRC
 	select NOP_USB_XCEIV if (SOC_TI81XX || SOC_AM33XX)
 	select TWL4030_USB if MACH_OMAP_3430SDP
 	select TWL6030_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
+	select OMAP_CONTROL_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
 	select USB_OTG_UTILS
 	help
 	  Say Y here if your system has a dual role high speed USB

drivers/usb/musb/omap2430.c

@@ -37,6 +37,7 @@
 #include <linux/err.h>
 #include <linux/delay.h>
 #include <linux/usb/musb-omap.h>
+#include <linux/usb/omap_control_usb.h>
 
 #include "musb_core.h"
 #include "omap2430.h"
@@ -46,7 +47,7 @@ struct omap2430_glue {
 	struct platform_device	*musb;
 	enum omap_musb_vbus_id_status status;
 	struct work_struct	omap_musb_mailbox_work;
-	u32 __iomem		*control_otghs;
+	struct device		*control_otghs;
 };
 #define glue_to_musb(g)		platform_get_drvdata(g->musb)
 
@@ -54,26 +55,6 @@ struct omap2430_glue		*_glue;
 
 static struct timer_list musb_idle_timer;
 
-/**
- * omap4_usb_phy_mailbox - write to usb otg mailbox
- * @glue: struct omap2430_glue *
- * @val: the value to be written to the mailbox
- *
- * On detection of a device (ID pin is grounded), this API should be called
- * to set AVALID, VBUSVALID and ID pin is grounded.
- *
- * When OMAP is connected to a host (OMAP in device mode), this API
- * is called to set AVALID, VBUSVALID and ID pin in high impedance.
- *
- * XXX: This function will be removed once we have a seperate driver for
- * control module
- */
-static void omap4_usb_phy_mailbox(struct omap2430_glue *glue, u32 val)
-{
-	if (glue->control_otghs)
-		writel(val, glue->control_otghs);
-}
-
 static void musb_do_idle(unsigned long _musb)
 {
 	struct musb	*musb = (void *)_musb;
@@ -269,7 +250,6 @@ EXPORT_SYMBOL_GPL(omap_musb_mailbox);
 
 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 {
-	u32 val;
 	struct musb *musb = glue_to_musb(glue);
 	struct device *dev = musb->controller;
 	struct musb_hdrc_platform_data *pdata = dev->platform_data;
@@ -285,8 +265,8 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 		musb->xceiv->last_event = USB_EVENT_ID;
 		if (musb->gadget_driver) {
 			pm_runtime_get_sync(dev);
-			val = AVALID | VBUSVALID;
-			omap4_usb_phy_mailbox(glue, val);
+			omap_control_usb_set_mode(glue->control_otghs,
+				USB_MODE_HOST);
 			omap2430_musb_set_vbus(musb, 1);
 		}
 		break;
@@ -299,8 +279,7 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 		musb->xceiv->last_event = USB_EVENT_VBUS;
 		if (musb->gadget_driver)
 			pm_runtime_get_sync(dev);
-		val = IDDIG | AVALID | VBUSVALID;
-		omap4_usb_phy_mailbox(glue, val);
+		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 		break;
 
 	case OMAP_MUSB_ID_FLOAT:
@@ -317,8 +296,8 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 			if (musb->xceiv->otg->set_vbus)
 				otg_set_vbus(musb->xceiv->otg, 0);
 		}
-		val = SESSEND | IDDIG;
-		omap4_usb_phy_mailbox(glue, val);
+		omap_control_usb_set_mode(glue->control_otghs,
+			USB_MODE_DISCONNECT);
 		break;
 	default:
 		dev_dbg(dev, "ID float\n");
@@ -415,7 +394,6 @@ err1:
 static void omap2430_musb_enable(struct musb *musb)
 {
 	u8		devctl;
-	u32		val;
 	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 	struct device *dev = musb->controller;
 	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
@@ -425,8 +403,7 @@ static void omap2430_musb_enable(struct musb *musb)
 	switch (glue->status) {
 
 	case OMAP_MUSB_ID_GROUND:
-		val = AVALID | VBUSVALID;
-		omap4_usb_phy_mailbox(glue, val);
+		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
 		if (data->interface_type != MUSB_INTERFACE_UTMI)
 			break;
 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
@@ -445,8 +422,7 @@ static void omap2430_musb_enable(struct musb *musb)
 		break;
 
 	case OMAP_MUSB_VBUS_VALID:
-		val = IDDIG | AVALID | VBUSVALID;
-		omap4_usb_phy_mailbox(glue, val);
+		omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
 		break;
 
 	default:
@@ -456,14 +432,12 @@ static void omap2430_musb_enable(struct musb *musb)
 
 static void omap2430_musb_disable(struct musb *musb)
 {
-	u32 val;
 	struct device *dev = musb->controller;
 	struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
 
-	if (glue->status != OMAP_MUSB_UNKNOWN) {
-		val = SESSEND | IDDIG;
-		omap4_usb_phy_mailbox(glue, val);
-	}
+	if (glue->status != OMAP_MUSB_UNKNOWN)
+		omap_control_usb_set_mode(glue->control_otghs,
+			USB_MODE_DISCONNECT);
 }
 
 static int omap2430_musb_exit(struct musb *musb)
@@ -498,7 +472,6 @@ static int omap2430_probe(struct platform_device *pdev)
 	struct omap2430_glue		*glue;
 	struct device_node		*np = pdev->dev.of_node;
 	struct musb_hdrc_config		*config;
-	struct resource			*res;
 	int				ret = -ENOMEM;
 
 	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
@@ -521,12 +494,6 @@ static int omap2430_probe(struct platform_device *pdev)
 	glue->musb			= musb;
 	glue->status			= OMAP_MUSB_UNKNOWN;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-
-	glue->control_otghs = devm_request_and_ioremap(&pdev->dev, res);
-	if (glue->control_otghs == NULL)
-		dev_dbg(&pdev->dev, "Failed to obtain control memory\n");
-
 	if (np) {
 		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 		if (!pdata) {
@@ -558,11 +525,22 @@ static int omap2430_probe(struct platform_device *pdev)
 		of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
 		of_property_read_u32(np, "power", (u32 *)&pdata->power);
 		config->multipoint = of_property_read_bool(np, "multipoint");
+		pdata->has_mailbox = of_property_read_bool(np,
+		    "ti,has-mailbox");
 
 		pdata->board_data	= data;
 		pdata->config		= config;
 	}
 
+	if (pdata->has_mailbox) {
+		glue->control_otghs = omap_get_control_dev();
+		if (IS_ERR(glue->control_otghs)) {
+			dev_vdbg(&pdev->dev, "Failed to get control device\n");
+			return -ENODEV;
+		}
+	} else {
+		glue->control_otghs = ERR_PTR(-ENODEV);
+	}
 	pdata->platform_ops		= &omap2430_ops;
 
 	platform_set_drvdata(pdev, glue);

drivers/usb/musb/omap2430.h

@@ -49,13 +49,4 @@
 #define OTG_FORCESTDBY		0x414
 #	define	ENABLEFORCE		(1 << 0)
 
-/*
- * Control Module bit definitions
- * XXX: Will be removed once we have a driver for control module.
- */
-#define	AVALID				BIT(0)
-#define	BVALID				BIT(1)
-#define	VBUSVALID			BIT(2)
-#define	SESSEND				BIT(3)
-#define	IDDIG				BIT(4)
 #endif	/* __MUSB_OMAP243X_H__ */

drivers/usb/phy/Kconfig

@@ -8,6 +8,7 @@ config OMAP_USB2
 	tristate "OMAP USB2 PHY Driver"
 	depends on ARCH_OMAP2PLUS
 	select USB_OTG_UTILS
+	select OMAP_CONTROL_USB
 	help
 	  Enable this to support the transceiver that is part of SOC. This
 	  driver takes care of all the PHY functionality apart from comparator.

drivers/usb/phy/omap-usb2.c

@@ -27,6 +27,7 @@
 #include <linux/err.h>
 #include <linux/pm_runtime.h>
 #include <linux/delay.h>
+#include <linux/usb/omap_control_usb.h>
 
 /**
  * omap_usb2_set_comparator - links the comparator present in the sytem with
@@ -52,29 +53,6 @@ int omap_usb2_set_comparator(struct phy_companion *comparator)
 }
 EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);
 
-/**
- * omap_usb_phy_power - power on/off the phy using control module reg
- * @phy: struct omap_usb *
- * @on: 0 or 1, based on powering on or off the PHY
- *
- * XXX: Remove this function once control module driver gets merged
- */
-static void omap_usb_phy_power(struct omap_usb *phy, int on)
-{
-	u32 val;
-
-	if (on) {
-		val = readl(phy->control_dev);
-		if (val & PHY_PD) {
-			writel(~PHY_PD, phy->control_dev);
-			/* XXX: add proper documentation for this delay */
-			mdelay(200);
-		}
-	} else {
-		writel(PHY_PD, phy->control_dev);
-	}
-}
-
 static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
 {
 	struct omap_usb *phy = phy_to_omapusb(otg->phy);
@@ -124,7 +102,7 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend)
 	struct omap_usb *phy = phy_to_omapusb(x);
 
 	if (suspend && !phy->is_suspended) {
-		omap_usb_phy_power(phy, 0);
+		omap_control_usb_phy_power(phy->control_dev, 0);
 		pm_runtime_put_sync(phy->dev);
 		phy->is_suspended = 1;
 	} else if (!suspend && phy->is_suspended) {
@@ -134,7 +112,7 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend)
 									ret);
 			return ret;
 		}
-		omap_usb_phy_power(phy, 1);
+		omap_control_usb_phy_power(phy->control_dev, 1);
 		phy->is_suspended = 0;
 	}
 
@@ -145,7 +123,6 @@ static int omap_usb2_probe(struct platform_device *pdev)
 {
 	struct omap_usb			*phy;
 	struct usb_otg			*otg;
-	struct resource			*res;
 
 	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
 	if (!phy) {
@@ -166,16 +143,14 @@ static int omap_usb2_probe(struct platform_device *pdev)
 	phy->phy.set_suspend	= omap_usb2_suspend;
 	phy->phy.otg		= otg;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-
-	phy->control_dev = devm_request_and_ioremap(&pdev->dev, res);
-	if (phy->control_dev == NULL) {
-		dev_err(&pdev->dev, "Failed to obtain io memory\n");
-		return -ENXIO;
+	phy->control_dev = omap_get_control_dev();
+	if (IS_ERR(phy->control_dev)) {
+		dev_dbg(&pdev->dev, "Failed to get control device\n");
+		return -ENODEV;
 	}
 
 	phy->is_suspended	= 1;
-	omap_usb_phy_power(phy, 0);
+	omap_control_usb_phy_power(phy->control_dev, 0);
 
 	otg->set_host		= omap_usb_set_host;
 	otg->set_peripheral	= omap_usb_set_peripheral;

include/linux/usb/omap_usb.h

@@ -25,13 +25,11 @@ struct omap_usb {
 	struct usb_phy		phy;
 	struct phy_companion	*comparator;
 	struct device		*dev;
-	u32 __iomem		*control_dev;
+	struct device		*control_dev;
 	struct clk		*wkupclk;
 	u8			is_suspended:1;
 };
 
-#define	PHY_PD	0x1
-
 #define	phy_to_omapusb(x)	container_of((x), struct omap_usb, phy)
 
 #if defined(CONFIG_OMAP_USB2) || defined(CONFIG_OMAP_USB2_MODULE)