* Marco Felsch (m.felsch@xxxxxxxxxxxxxx) wrote: > This add the support to set the optional connector orientation bit which > is part of the optional CONFIG_STANDARD_OUTPUT register 0x18 [1]. This > allows system designers to connect the tcpc orientation pin directly to > the 2:1 ss-mux. > > [1] https://www.usb.org/sites/default/files/documents/usb-port_controller_specification_rev2.0_v1.0_0.pdf > > Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx> > --- > drivers/usb/typec/tcpm/tcpci.c | 43 ++++++++++++++++++++++++++++++++++ > include/linux/usb/tcpci.h | 8 +++++++ > 2 files changed, 51 insertions(+) > > diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c > index 7118551827f6..7ce9d4923bc7 100644 > --- a/drivers/usb/typec/tcpm/tcpci.c > +++ b/drivers/usb/typec/tcpm/tcpci.c > @@ -67,6 +67,18 @@ static int tcpci_write16(struct tcpci *tcpci, unsigned int reg, u16 val) > return regmap_raw_write(tcpci->regmap, reg, &val, sizeof(u16)); > } > > +static bool tcpci_check_std_output_cap(struct regmap *regmap, u8 mask) > +{ > + unsigned int reg; > + int ret; > + > + ret = regmap_read(regmap, TCPC_STD_OUTPUT_CAP, ®); > + if (ret < 0) > + return ret; > + > + return (reg & mask) == mask; > +} > + > static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) > { > struct tcpci *tcpci = tcpc_to_tcpci(tcpc); > @@ -301,6 +313,27 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc, > TCPC_TCPC_CTRL_ORIENTATION : 0); > } > > +static int tcpci_set_orientation(struct tcpc_dev *tcpc, > + enum typec_orientation orientation) > +{ > + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); > + unsigned int reg; > + > + switch (orientation) { > + case TYPEC_ORIENTATION_NONE: > + /* We can't put a single output into high impedance */ Is that intended to be a fallthrough? If so I guess it needs marking as such with a fallthrough; Dave > + case TYPEC_ORIENTATION_NORMAL: > + reg = TCPC_CONFIG_STD_OUTPUT_ORIENTATION_NORMAL; > + break; > + case TYPEC_ORIENTATION_REVERSE: > + reg = TCPC_CONFIG_STD_OUTPUT_ORIENTATION_FLIPPED; > + break; > + } > + > + return regmap_update_bits(tcpci->regmap, TCPC_CONFIG_STD_OUTPUT, > + TCPC_CONFIG_STD_OUTPUT_ORIENTATION_MASK, reg); > +} > + > static void tcpci_set_partner_usb_comm_capable(struct tcpc_dev *tcpc, bool capable) > { > struct tcpci *tcpci = tcpc_to_tcpci(tcpc); > @@ -808,6 +841,9 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) > if (tcpci->data->vbus_vsafe0v) > tcpci->tcpc.is_vbus_vsafe0v = tcpci_is_vbus_vsafe0v; > > + if (tcpci->data->set_orientation) > + tcpci->tcpc.set_orientation = tcpci_set_orientation; > + > err = tcpci_parse_config(tcpci); > if (err < 0) > return ERR_PTR(err); > @@ -851,6 +887,13 @@ static int tcpci_probe(struct i2c_client *client) > if (err < 0) > return err; > > + err = tcpci_check_std_output_cap(chip->data.regmap, > + TCPC_STD_OUTPUT_CAP_ORIENTATION); > + if (err < 0) > + return err; > + > + chip->data.set_orientation = err; > + > chip->tcpci = tcpci_register_port(&client->dev, &chip->data); > if (IS_ERR(chip->tcpci)) > return PTR_ERR(chip->tcpci); > diff --git a/include/linux/usb/tcpci.h b/include/linux/usb/tcpci.h > index 467e8045e9f8..f2bfb4250366 100644 > --- a/include/linux/usb/tcpci.h > +++ b/include/linux/usb/tcpci.h > @@ -47,6 +47,9 @@ > #define TCPC_SINK_FAST_ROLE_SWAP BIT(0) > > #define TCPC_CONFIG_STD_OUTPUT 0x18 > +#define TCPC_CONFIG_STD_OUTPUT_ORIENTATION_MASK BIT(0) > +#define TCPC_CONFIG_STD_OUTPUT_ORIENTATION_NORMAL 0 > +#define TCPC_CONFIG_STD_OUTPUT_ORIENTATION_FLIPPED 1 > > #define TCPC_TCPC_CTRL 0x19 > #define TCPC_TCPC_CTRL_ORIENTATION BIT(0) > @@ -127,6 +130,7 @@ > #define TCPC_DEV_CAP_2 0x26 > #define TCPC_STD_INPUT_CAP 0x28 > #define TCPC_STD_OUTPUT_CAP 0x29 > +#define TCPC_STD_OUTPUT_CAP_ORIENTATION BIT(0) > > #define TCPC_MSG_HDR_INFO 0x2e > #define TCPC_MSG_HDR_INFO_DATA_ROLE BIT(3) > @@ -198,12 +202,16 @@ struct tcpci; > * Chip level drivers are expected to check for contaminant and call > * tcpm_clean_port when the port is clean to put the port back into > * toggling state. > + * @set_orientation: > + * Optional; Enable setting the connector orientation > + * CONFIG_STANDARD_OUTPUT (0x18) bit0. > */ > struct tcpci_data { > struct regmap *regmap; > unsigned char TX_BUF_BYTE_x_hidden:1; > unsigned char auto_discharge_disconnect:1; > unsigned char vbus_vsafe0v:1; > + unsigned char set_orientation:1; > > int (*init)(struct tcpci *tcpci, struct tcpci_data *data); > int (*set_vconn)(struct tcpci *tcpci, struct tcpci_data *data, > -- > 2.39.2 > > -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ \ dave @ treblig.org | | In Hex / \ _________________________|_____ http://www.treblig.org |_______/
