Commit 2a16e18c authored by Badhri Jagan Sridharan's avatar Badhri Jagan Sridharan Committed by Greg Kroah-Hartman
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usb: typec: tcpci_maxim: Enable data path when partner is USB Comm capable 



Configure USB switches when partner is USB Communication capable.
The is enabled USB data communication over D+/D- pins.

Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarBadhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210202003101.221145-3-badhri@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 372a3d0b

drivers/usb/typec/tcpm/tcpci_maxim.c

+19 −0
Original line number Diff line number Diff line
@@ -19,6 +19,9 @@ 
#define PD_ACTIVITY_TIMEOUT_MS				10000



#define TCPC_VENDOR_ALERT				0x80

#define TCPC_VENDOR_USBSW_CTRL				0x93

#define TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA		0x9

#define TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA		0



#define TCPC_RECEIVE_BUFFER_COUNT_OFFSET		0

#define TCPC_RECEIVE_BUFFER_FRAME_TYPE_OFFSET		1
@@ -274,6 +277,21 @@ static void process_tx(struct max_tcpci_chip *chip, u16 status) 
		max_tcpci_init_regs(chip);

}



/* Enable USB switches when partner is USB communications capable */

static void max_tcpci_set_partner_usb_comm_capable(struct tcpci *tcpci, struct tcpci_data *data,

						   bool capable)

{

	struct max_tcpci_chip *chip = tdata_to_max_tcpci(data);

	int ret;



	ret = max_tcpci_write8(chip, TCPC_VENDOR_USBSW_CTRL, capable ?

			       TCPC_VENDOR_USBSW_CTRL_ENABLE_USB_DATA :

			       TCPC_VENDOR_USBSW_CTRL_DISABLE_USB_DATA);



	if (ret < 0)

		dev_err(chip->dev, "Failed to enable USB switches");

}



static irqreturn_t _max_tcpci_irq(struct max_tcpci_chip *chip, u16 status)

{

	u16 mask;
@@ -453,6 +471,7 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id 
	chip->data.frs_sourcing_vbus = max_tcpci_frs_sourcing_vbus;

	chip->data.auto_discharge_disconnect = true;

	chip->data.vbus_vsafe0v = true;

	chip->data.set_partner_usb_comm_capable = max_tcpci_set_partner_usb_comm_capable;



	max_tcpci_init_regs(chip);

	chip->tcpci = tcpci_register_port(chip->dev, &chip->data);