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usb: typec: tcpci: add support to set connector orientation

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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@pengutronix.de>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240701132133.3054394-1-m.felsch@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marco Felsch 2024-07-01 15:21:24 +02:00 committed by Greg Kroah-Hartman
parent 89b5a5a607
commit 62ce9ef147
2 changed files with 52 additions and 0 deletions
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44
drivers/usb/typec/tcpm/tcpci.c
View File

@ -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, &reg);
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 +313,28 @@ 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 */
fallthrough;
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);
@ -830,6 +864,9 @@ 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);
@ -873,6 +910,13 @@ 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);

8
include/linux/usb/tcpci.h
View File

@ -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)
@ -209,6 +213,9 @@ struct tcpci;
* swap following Discover Identity on SOP' occurs.
* Return true when the TCPM is allowed to request a Vconn swap
* after Discovery Identity on SOP.
* @set_orientation:
* Optional; Enable setting the connector orientation
* CONFIG_STANDARD_OUTPUT (0x18) bit0.
*/
struct tcpci_data {
struct regmap *regmap;
@ -216,6 +223,7 @@ struct tcpci_data {
unsigned char auto_discharge_disconnect:1;
unsigned char vbus_vsafe0v:1;
unsigned char cable_comm_capable: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,