diff options
| author |   Alvin Šipraga <alsi@bang-olufsen.dk> | 2023-03-18 16:05:54 +0100 |
|---|---|---|
| committer |   Chanwoo Choi <cw00.choi@samsung.com> | 2023-05-29 23:31:25 +0900 |
| commit | df101446a402bb1bc164f3445d2f028a1dbec6ac (patch) | |
| tree | be3cc1b890074d0ccb3dd95dd28608fe95c0e63b /drivers/extcon | |
| parent | extcon: usbc-tusb320: add accessory detection support (diff) | |
| download | wireguard-linux-df101446a402bb1bc164f3445d2f028a1dbec6ac.tar.xz wireguard-linux-df101446a402bb1bc164f3445d2f028a1dbec6ac.zip | |
extcon: usbc-tusb320: add usb_role_switch support
The connector child node of the TUSB320 device might be linked with a
dual-role capable USB controller. Add driver support for detecting a
usb_role_switch and setting its state in the typec interrupt handler.
This follows similar practice in other drivers in the typec subsystem,
which this extcon driver can opt-in to.
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
| -rw-r--r-- | drivers/extcon/extcon-usbc-tusb320.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-usbc-tusb320.c b/drivers/extcon/extcon-usbc-tusb320.c index 882d1f48495e..cc2d0ac7c5f6 100644 --- a/drivers/extcon/extcon-usbc-tusb320.c +++ b/drivers/extcon/extcon-usbc-tusb320.c @@ -16,6 +16,7 @@ #include <linux/regmap.h> #include <linux/usb/typec.h> #include <linux/usb/typec_altmode.h> +#include <linux/usb/role.h> #define TUSB320_REG8 0x8 #define TUSB320_REG8_CURRENT_MODE_ADVERTISE GENMASK(7, 6) @@ -80,6 +81,7 @@ struct tusb320_priv { enum typec_port_type port_type; enum typec_pwr_opmode pwr_opmode; struct fwnode_handle *connector_fwnode; + struct usb_role_switch *role_sw; }; static const char * const tusb_attached_states[] = { @@ -278,6 +280,7 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9) struct typec_port *port = priv->port; struct device *dev = priv->dev; int typec_mode; + enum usb_role usb_role; enum typec_role pwr_role; enum typec_data_role data_role; u8 state, mode, accessory; @@ -300,11 +303,13 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9) switch (state) { case TUSB320_ATTACHED_STATE_DFP: typec_mode = TYPEC_MODE_USB2; + usb_role = USB_ROLE_HOST; pwr_role = TYPEC_SOURCE; data_role = TYPEC_HOST; break; case TUSB320_ATTACHED_STATE_UFP: typec_mode = TYPEC_MODE_USB2; + usb_role = USB_ROLE_DEVICE; pwr_role = TYPEC_SINK; data_role = TYPEC_DEVICE; break; @@ -316,6 +321,7 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9) if (accessory == TUSB320_REG8_ACCESSORY_CONNECTED_AUDIO || accessory == TUSB320_REG8_ACCESSORY_CONNECTED_ACHRG) { typec_mode = TYPEC_MODE_AUDIO; + usb_role = USB_ROLE_NONE; pwr_role = TYPEC_SINK; data_role = TYPEC_DEVICE; break; @@ -323,12 +329,14 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9) TUSB320_REG8_ACCESSORY_CONNECTED_DBGDFP) { typec_mode = TYPEC_MODE_DEBUG; pwr_role = TYPEC_SOURCE; + usb_role = USB_ROLE_HOST; data_role = TYPEC_HOST; break; } else if (accessory == TUSB320_REG8_ACCESSORY_CONNECTED_DBGUFP) { typec_mode = TYPEC_MODE_DEBUG; pwr_role = TYPEC_SINK; + usb_role = USB_ROLE_DEVICE; data_role = TYPEC_DEVICE; break; } @@ -339,6 +347,7 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9) fallthrough; default: typec_mode = TYPEC_MODE_USB2; + usb_role = USB_ROLE_NONE; pwr_role = TYPEC_SINK; data_role = TYPEC_DEVICE; break; @@ -348,6 +357,7 @@ static void tusb320_typec_irq_handler(struct tusb320_priv *priv, u8 reg9) typec_set_pwr_role(port, pwr_role); typec_set_data_role(port, data_role); typec_set_mode(port, typec_mode); + usb_role_switch_set_role(priv->role_sw, usb_role); mode = FIELD_GET(TUSB320_REG8_CURRENT_MODE_DETECT, reg8); if (mode == TUSB320_REG8_CURRENT_MODE_DETECT_DEF) @@ -472,10 +482,20 @@ static int tusb320_typec_probe(struct i2c_client *client, goto err_put; } + /* Find any optional USB role switch that needs reporting to */ + priv->role_sw = fwnode_usb_role_switch_get(connector); + if (IS_ERR(priv->role_sw)) { + ret = PTR_ERR(priv->role_sw); + goto err_unreg; + } + priv->connector_fwnode = connector; return 0; +err_unreg: + typec_unregister_port(priv->port); + err_put: fwnode_handle_put(connector); @@ -484,6 +504,7 @@ err_put: static void tusb320_typec_remove(struct tusb320_priv *priv) { + usb_role_switch_put(priv->role_sw); typec_unregister_port(priv->port); fwnode_handle_put(priv->connector_fwnode); } |