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usb: typec: tcpci_maxim: Enable data path when partner is USB Comm capable

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

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210202003101.221145-3-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Badhri Jagan Sridharan 2021-02-01 16:31:01 -08:00 committed by Greg Kroah-Hartman
parent 372a3d0b6b
commit 2a16e18c34
1 changed files with 19 additions and 0 deletions
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19
drivers/usb/typec/tcpm/tcpci_maxim.c
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@ -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);