On Wed, Jun 14, 2023 at 03:10:41PM +0200, Neil Armstrong wrote:
> The FSA4480 Type-C switch supports switching the Audio R/L,
> AGND and MIC signals to the USB-C DP/DM and SBU1/2 to support
> the Audio Accessory Mode.
>
> The FSA4480 has an integrated Audio jack detection mechanism
> to automatically mux the AGND, MIX and Sense to the correct
> SBU lines to support 3 pole and both 4 pole TRRS pinouts.
>
> Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Acked-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> ---
> drivers/usb/typec/mux/fsa4480.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/usb/typec/mux/fsa4480.c b/drivers/usb/typec/mux/fsa4480.c
> index b2913594a58f..45f5683b7d81 100644
> --- a/drivers/usb/typec/mux/fsa4480.c
> +++ b/drivers/usb/typec/mux/fsa4480.c
> @@ -25,15 +25,24 @@
> #define FSA4480_DELAY_L_MIC 0x0e
> #define FSA4480_DELAY_L_SENSE 0x0f
> #define FSA4480_DELAY_L_AGND 0x10
> +#define FSA4480_FUNCTION_ENABLE 0x12
> #define FSA4480_RESET 0x1e
> #define FSA4480_MAX_REGISTER 0x1f
>
> #define FSA4480_ENABLE_DEVICE BIT(7)
> #define FSA4480_ENABLE_SBU GENMASK(6, 5)
> #define FSA4480_ENABLE_USB GENMASK(4, 3)
> +#define FSA4480_ENABLE_SENSE BIT(2)
> +#define FSA4480_ENABLE_MIC BIT(1)
> +#define FSA4480_ENABLE_AGND BIT(0)
>
> #define FSA4480_SEL_SBU_REVERSE GENMASK(6, 5)
> #define FSA4480_SEL_USB GENMASK(4, 3)
> +#define FSA4480_SEL_SENSE BIT(2)
> +#define FSA4480_SEL_MIC BIT(1)
> +#define FSA4480_SEL_AGND BIT(0)
> +
> +#define FSA4480_ENABLE_AUTO_JACK_DETECT BIT(0)
>
> struct fsa4480 {
> struct i2c_client *client;
> @@ -95,6 +104,9 @@ static int fsa4480_set(struct fsa4480 *fsa)
> default:
> return -EOPNOTSUPP;
> }
> + } else if (fsa->mode == TYPEC_MODE_AUDIO) {
> + /* Audio Accessory Mode, setup to auto Jack Detection */
> + enable |= FSA4480_ENABLE_USB | FSA4480_ENABLE_AGND;
> } else
> return -EOPNOTSUPP;
>
> @@ -110,6 +122,11 @@ static int fsa4480_set(struct fsa4480 *fsa)
> regmap_write(fsa->regmap, FSA4480_SWITCH_SELECT, sel);
> regmap_write(fsa->regmap, FSA4480_SWITCH_ENABLE, enable);
>
> + /* Start AUDIO JACK DETECTION to setup MIC, AGND & Sense muxes */
> + if (enable & FSA4480_ENABLE_AGND)
> + regmap_write(fsa->regmap, FSA4480_FUNCTION_ENABLE,
> + FSA4480_ENABLE_AUTO_JACK_DETECT);
> +
> if (enable & FSA4480_ENABLE_SBU) {
> /* 15us to allow the SBU switch to turn on again */
> usleep_range(15, 1000);
thanks,
--
heikki
