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Date: Fri, 19 Jul 2013 18:04:34 +0530
From: George Cherian <george.cherian@...com>
To: <linux-usb@...r.kernel.org>
CC: <balbi@...com>, <linux-kernel@...r.kernel.org>,
<gregkh@...uxfoundation.org>, <linux-omap@...r.kernel.org>,
<kishon@...com>, <bigeasy@...utronix.de>,
George Cherian <george.cherian@...com>
Subject: [PATCH v2 1/4] usb: phy: phy-omap-control: Add API to power and wakeup
on/off USB PHY for AM335X
Add APIs to
-power on/off USB PHY for AM335X
-enable/disable PHY wakeup.
This API will be called from phy-amxxxx-usb driver.
Signed-off-by: George Cherian <george.cherian@...com>
---
drivers/usb/phy/phy-omap-control.c | 67 ++++++++++++++++++++++++++++++++++++
include/linux/usb/omap_control_usb.h | 24 +++++++++++++
2 files changed, 91 insertions(+)
diff --git a/drivers/usb/phy/phy-omap-control.c b/drivers/usb/phy/phy-omap-control.c
index 1419ced..4f2502c 100644
--- a/drivers/usb/phy/phy-omap-control.c
+++ b/drivers/usb/phy/phy-omap-control.c
@@ -46,6 +46,73 @@ struct device *omap_get_control_dev(void)
EXPORT_SYMBOL_GPL(omap_get_control_dev);
/**
+ * omap_control_am335x_phy_wkup - PHY wakeup on/off using control
+ * module
+ * @dev: the control module device
+ * @on: 0 to off and 1 to on PHY wakeup feature
+ * @id: phy id 0 or 1 for phy instance 0 and 1 repectively
+ *
+ * AMXXXX PHY driver should call this API to enable or disable PHY wakeup.
+ */
+void omap_control_am335x_phy_wkup(struct device *dev, bool on, u8 id)
+{
+ u32 val;
+ u32 *phy_wkup_reg;
+ struct omap_control_usb *control_usb = dev_get_drvdata(dev);
+
+ if (control_usb->type != OMAP_CTRL_DEV_TYPE3 || id < 0 || id > 1)
+ return;
+
+ phy_wkup_reg = control_usb->dev_conf + AM335X_USB_WKUP_OFFSET;
+ val = readl(phy_wkup_reg);
+
+ if (on)
+ val |= id ? AM335X_USB1_WKUP_CTRL_ENABLE :
+ AM335X_USB0_WKUP_CTRL_ENABLE;
+ else
+ val &= id ? ~AM335X_USB1_WKUP_CTRL_ENABLE :
+ ~AM335X_USB0_WKUP_CTRL_ENABLE;
+
+
+ writel(val, phy_wkup_reg);
+}
+EXPORT_SYMBOL_GPL(omap_control_am335x_phy_wkup);
+
+/**
+ * omap_control_am335x_phy_power - power on/off the serializer using control
+ * module
+ * @dev: the control module device
+ * @on: 0 to off and 1 to on based on powering on or off the PHY
+ * @id: phy id 0 or 1 for phy instance 0 and 1 repectively
+ *
+ * AMXXXX PHY driver should call this API to power on or off the PHY.
+ */
+void omap_control_am335x_phy_power(struct device *dev, bool on, u8 id)
+{
+ u32 val;
+ u32 *phy_pwr_reg;
+ struct omap_control_usb *control_usb = dev_get_drvdata(dev);
+
+ if (control_usb->type != OMAP_CTRL_DEV_TYPE3 || id < 0 || id > 1)
+ return;
+
+ phy_pwr_reg = GET_PHY_POWER_REG(control_usb->dev_conf, id);
+ val = readl(phy_pwr_reg);
+
+ if (on) {
+ val &= ~(AM335X_USBPHY_CM_PWRDN | AM335X_USBPHY_OTG_PWRDN);
+ val |= AM335X_USBPHY_OTGVDET_EN |
+ AM335X_USBPHY_OTGSESSEND_EN;
+ } else
+ val |= AM335X_USBPHY_CM_PWRDN | AM335X_USBPHY_OTG_PWRDN;
+
+
+ writel(val, phy_pwr_reg);
+}
+EXPORT_SYMBOL_GPL(omap_control_am335x_phy_power);
+
+
+/**
* omap_control_usb3_phy_power - power on/off the serializer using control
* module
* @dev: the control module device
diff --git a/include/linux/usb/omap_control_usb.h b/include/linux/usb/omap_control_usb.h
index 27b5b8c..a92b417 100644
--- a/include/linux/usb/omap_control_usb.h
+++ b/include/linux/usb/omap_control_usb.h
@@ -45,6 +45,7 @@ enum omap_control_usb_mode {
/* To differentiate ctrl module IP having either mailbox or USB3 PHY power */
#define OMAP_CTRL_DEV_TYPE1 0x1
#define OMAP_CTRL_DEV_TYPE2 0x2
+#define OMAP_CTRL_DEV_TYPE3 0x3
#define OMAP_CTRL_DEV_PHY_PD BIT(0)
@@ -63,10 +64,23 @@ enum omap_control_usb_mode {
#define OMAP_CTRL_USB3_PHY_TX_RX_POWERON 0x3
#define OMAP_CTRL_USB3_PHY_TX_RX_POWEROFF 0x0
+#define GET_PHY_POWER_REG(base, id) ((u32 *)base + (id * 2))
+#define AM335X_USBPHY_CM_PWRDN (1 << 0)
+#define AM335X_USBPHY_OTG_PWRDN (1 << 1)
+#define AM335X_USBPHY_OTGVDET_EN (1 << 19)
+#define AM335X_USBPHY_OTGSESSEND_EN (1 << 20)
+#define AM335X_USB_WKUP_OFFSET 0xA
+#define AM335X_USB0_WKUP_CTRL_ENABLE (1 << 0)
+#define AM335X_USB1_WKUP_CTRL_ENABLE (1 << 8)
+
+
+
#if IS_ENABLED(CONFIG_OMAP_CONTROL_USB)
extern struct device *omap_get_control_dev(void);
extern void omap_control_usb_phy_power(struct device *dev, int on);
extern void omap_control_usb3_phy_power(struct device *dev, bool on);
+extern void omap_control_am335x_phy_power(struct device *dev, bool on, u8 id);
+extern void omap_control_am335x_phy_wkup(struct device *dev, bool on, u8 id);
extern void omap_control_usb_set_mode(struct device *dev,
enum omap_control_usb_mode mode);
#else
@@ -87,6 +101,16 @@ static inline void omap_control_usb_set_mode(struct device *dev,
enum omap_control_usb_mode mode)
{
}
+
+static inline void omap_control_am335x_phy_power(struct device *dev,
+ bool on, u8 id)
+{
+}
+
+static inline void omap_control_am335x_phy_wkup(struct device *dev,
+ bool on, u8 id)
+{
+}
#endif
#endif /* __OMAP_CONTROL_USB_H__ */
--
1.8.1.4
--
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