On Mon, Feb 01, 2021 at 04:31:01PM -0800, Badhri Jagan Sridharan wrote:
> Configure USB switches when partner is USB Communication capable.
> The is enabled USB data communication over D+/D- pins.
>
> Signed-off-by: Badhri Jagan Sridharan <badhri@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> drivers/usb/typec/tcpm/tcpci_maxim.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpci_maxim.c b/drivers/usb/typec/tcpm/tcpci_maxim.c
> index f1674a611033..041a1c393594 100644
> --- a/drivers/usb/typec/tcpm/tcpci_maxim.c
> +++ b/drivers/usb/typec/tcpm/tcpci_maxim.c
> @@ -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);
> --
> 2.30.0.365.g02bc693789-goog
>
