linux-kernel - [PATCH v4 14/16] phy: Add USB speed related PHY modes

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Date:   Wed,  3 Jan 2018 16:58:47 +0530
From:   Manu Gautam <mgautam@...eaurora.org>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     Felipe Balbi <balbi@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, Manu Gautam <mgautam@...eaurora.org>,
        linux-kernel@...r.kernel.org (open list:GENERIC PHY FRAMEWORK)
Subject: [PATCH v4 14/16] phy: Add USB speed related PHY modes

Add following USB speed related PHY modes:
LS (Low Speed), FS (Full Speed), HS (High Speed), SS (Super Speed)

Speed related information is required by some QCOM PHY drivers
to program PHY monitor resume/remote-wakeup events in suspended
state. Speed is needed in order to set correct polarity of wakeup
events for detection. E.g. QUSB2 PHY monitors DP/DM line state
depending on whether speed is LS or FS/HS to detect resume.
Similarly QMP USB3 PHY in SS mode should monitor RX terminations
attach/detach and LFPS events depending on SSPHY is active or not.

Signed-off-by: Manu Gautam <mgautam@...eaurora.org>
---
 drivers/phy/phy-core.c  | 15 +++++++++++++++
 include/linux/phy/phy.h | 32 ++++++++++++++++++++++++--------
 2 files changed, 39 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index b4964b0..e4f0525 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -357,6 +357,21 @@ int phy_set_mode(struct phy *phy, enum phy_mode mode)
 }
 EXPORT_SYMBOL_GPL(phy_set_mode);
 
+enum phy_mode phy_get_mode(struct phy *phy)
+{
+	enum phy_mode ret;
+
+	if (!phy || !phy->ops->get_mode)
+		return PHY_MODE_INVALID;
+
+	mutex_lock(&phy->mutex);
+	ret = phy->ops->get_mode(phy);
+	mutex_unlock(&phy->mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phy_get_mode);
+
 int phy_reset(struct phy *phy)
 {
 	int ret;
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index d8da3e5..4a5cbd0 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -25,7 +25,15 @@
 enum phy_mode {
 	PHY_MODE_INVALID,
 	PHY_MODE_USB_HOST,
+	PHY_MODE_USB_HOST_LS,
+	PHY_MODE_USB_HOST_FS,
+	PHY_MODE_USB_HOST_HS,
+	PHY_MODE_USB_HOST_SS,
 	PHY_MODE_USB_DEVICE,
+	PHY_MODE_USB_DEVICE_LS,
+	PHY_MODE_USB_DEVICE_FS,
+	PHY_MODE_USB_DEVICE_HS,
+	PHY_MODE_USB_DEVICE_SS,
 	PHY_MODE_USB_OTG,
 	PHY_MODE_SGMII,
 	PHY_MODE_10GKR,
@@ -40,19 +48,21 @@ enum phy_mode {
  * @power_on: powering on the phy
  * @power_off: powering off the phy
  * @set_mode: set the mode of the phy
+ * @get_mode: get current mode of PHY
  * @reset: resetting the phy
  * @calibrate: calibrate the phy
  * @owner: the module owner containing the ops
  */
 struct phy_ops {
-	int	(*init)(struct phy *phy);
-	int	(*exit)(struct phy *phy);
-	int	(*power_on)(struct phy *phy);
-	int	(*power_off)(struct phy *phy);
-	int	(*set_mode)(struct phy *phy, enum phy_mode mode);
-	int	(*reset)(struct phy *phy);
-	int	(*calibrate)(struct phy *phy);
-	struct module *owner;
+	int		(*init)(struct phy *phy);
+	int		(*exit)(struct phy *phy);
+	int		(*power_on)(struct phy *phy);
+	int		(*power_off)(struct phy *phy);
+	int		(*set_mode)(struct phy *phy, enum phy_mode mode);
+	enum phy_mode	(*get_mode)(struct phy *phy);
+	int		(*reset)(struct phy *phy);
+	int		(*calibrate)(struct phy *phy);
+	struct module	*owner;
 };
 
 /**
@@ -144,6 +154,7 @@ static inline void *phy_get_drvdata(struct phy *phy)
 int phy_power_on(struct phy *phy);
 int phy_power_off(struct phy *phy);
 int phy_set_mode(struct phy *phy, enum phy_mode mode);
+enum phy_mode phy_get_mode(struct phy *phy);
 int phy_reset(struct phy *phy);
 int phy_calibrate(struct phy *phy);
 static inline int phy_get_bus_width(struct phy *phy)
@@ -260,6 +271,11 @@ static inline int phy_set_mode(struct phy *phy, enum phy_mode mode)
 	return -ENOSYS;
 }
 
+static inline enum phy_mode phy_get_mode(struct phy *phy)
+{
+	return PHY_MODE_INVALID;
+}
+
 static inline int phy_reset(struct phy *phy)
 {
 	if (!phy)
-- 
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