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

Manu Gautam
2018-01-03T11:28:47Z

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@codeaurora.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)