[PATCH v3 11/12] usb: typec: tcpm: add alt mode enter/exit/vdm support for sop'

RD Babiera
2024-01-08T19:16:50Z

Add tcpm_cable_ops for enter, exit, and vdm to the tcpm, which are
registered after registering port alt modes through
typec_port_register_cable_ops. Enter Mode on SOP' now sends Exit Mode upon
failure to report to the driver.

tcpm_queue_vdm_unlocked now takes sop type as input. Proper adev_actions
in tcpm_pd_svdm are selected for SOP' messages.

Signed-off-by: RD Babiera <rdbabiera@google.com>
---
drivers/usb/typec/tcpm/tcpm.c | 126 ++++++++++++++++++++++++++++------
1 file changed, 106 insertions(+), 20 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index d16edf112858..86d9962961c2 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -1556,7 +1556,7 @@ static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
}

static void tcpm_queue_vdm_unlocked(struct tcpm_port *port, const u32 header,
- const u32 *data, int cnt)
+ const u32 *data, int cnt, enum tcpm_transmit_type tx_sop_type)
{
mutex_lock(&port->lock);
tcpm_queue_vdm(port, header, data, cnt, TCPC_TX_SOP);
@@ -2144,14 +2144,28 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
}
break;
case CMD_ENTER_MODE:
- if (adev && pdev)
- *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
+ *response_tx_sop_type = rx_sop_type;
+ if (rx_sop_type == TCPC_TX_SOP) {
+ if (adev && pdev) {
+ typec_altmode_update_active(pdev, true);
+ *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
+ }
+ } else if (rx_sop_type == TCPC_TX_SOP_PRIME) {
+ if (adev && pdev_prime) {
+ typec_altmode_update_active(pdev_prime, true);
+ *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
+ }
+ }
return 0;
case CMD_EXIT_MODE:
- if (adev && pdev) {
- /* Back to USB Operation */
- *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
- return 0;
+ *response_tx_sop_type = rx_sop_type;
+ if (rx_sop_type == TCPC_TX_SOP) {
+ if (adev && pdev) {
+ typec_altmode_update_active(pdev, false);
+ /* Back to USB Operation */
+ *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
+ return 0;
+ }
}
break;
case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
@@ -2284,19 +2298,37 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port,
typec_altmode_vdm(adev, p[0], &p[1], cnt);
break;
case ADEV_QUEUE_VDM:
- typec_altmode_vdm(adev, p[0], &p[1], cnt);
+ if (response_tx_sop_type == TCPC_TX_SOP_PRIME)
+ typec_cable_altmode_vdm(adev, TYPEC_PLUG_SOP_P, p[0], &p[1], cnt);
+ else
+ typec_altmode_vdm(adev, p[0], &p[1], cnt);
break;
case ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL:
- if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
- int svdm_version = typec_get_negotiated_svdm_version(
- port->typec_port);
- if (svdm_version < 0)
- break;
+ if (response_tx_sop_type == TCPC_TX_SOP_PRIME) {
+ if (typec_cable_altmode_vdm(adev, TYPEC_PLUG_SOP_P,
+ p[0], &p[1], cnt)) {
+ int svdm_version = typec_get_cable_svdm_version(
+ port->typec_port);
+ if (svdm_version < 0)
+ break;

- response[0] = VDO(adev->svid, 1, svdm_version,
- CMD_EXIT_MODE);
- response[0] |= VDO_OPOS(adev->mode);
- rlen = 1;
+ response[0] = VDO(adev->svid, 1, svdm_version,
+ CMD_EXIT_MODE);
+ response[0] |= VDO_OPOS(adev->mode);
+ rlen = 1;
+ }
+ } else {
+ if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
+ int svdm_version = typec_get_negotiated_svdm_version(
+ port->typec_port);
+ if (svdm_version < 0)
+ break;
+
+ response[0] = VDO(adev->svid, 1, svdm_version,
+ CMD_EXIT_MODE);
+ response[0] |= VDO_OPOS(adev->mode);
+ rlen = 1;
+ }
}
break;
case ADEV_ATTENTION:
@@ -2731,7 +2763,7 @@ static int tcpm_altmode_enter(struct typec_altmode *altmode, u32 *vdo)
header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE);
header |= VDO_OPOS(altmode->mode);

- tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0);
+ tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0, TCPC_TX_SOP);
return 0;
}

@@ -2748,7 +2780,7 @@ static int tcpm_altmode_exit(struct typec_altmode *altmode)
header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE);
header |= VDO_OPOS(altmode->mode);

- tcpm_queue_vdm_unlocked(port, header, NULL, 0);
+ tcpm_queue_vdm_unlocked(port, header, NULL, 0, TCPC_TX_SOP);
return 0;
}

@@ -2757,7 +2789,7 @@ static int tcpm_altmode_vdm(struct typec_altmode *altmode,
{
struct tcpm_port *port = typec_altmode_get_drvdata(altmode);

- tcpm_queue_vdm_unlocked(port, header, data, count - 1);
+ tcpm_queue_vdm_unlocked(port, header, data, count - 1, TCPC_TX_SOP);

return 0;
}
@@ -2768,6 +2800,58 @@ static const struct typec_altmode_ops tcpm_altmode_ops = {
.vdm = tcpm_altmode_vdm,
};

+
+static int tcpm_cable_altmode_enter(struct typec_altmode *altmode, enum typec_plug_index sop,
+ u32 *vdo)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+ int svdm_version;
+ u32 header;
+
+ svdm_version = typec_get_cable_svdm_version(port->typec_port);
+ if (svdm_version < 0)
+ return svdm_version;
+
+ header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE);
+ header |= VDO_OPOS(altmode->mode);
+
+ tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0, TCPC_TX_SOP_PRIME);
+ return 0;
+}
+
+static int tcpm_cable_altmode_exit(struct typec_altmode *altmode, enum typec_plug_index sop)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+ int svdm_version;
+ u32 header;
+
+ svdm_version = typec_get_cable_svdm_version(port->typec_port);
+ if (svdm_version < 0)
+ return svdm_version;
+
+ header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE);
+ header |= VDO_OPOS(altmode->mode);
+
+ tcpm_queue_vdm_unlocked(port, header, NULL, 0, TCPC_TX_SOP_PRIME);
+ return 0;
+}
+
+static int tcpm_cable_altmode_vdm(struct typec_altmode *altmode, enum typec_plug_index sop,
+ u32 header, const u32 *data, int count)
+{
+ struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
+
+ tcpm_queue_vdm_unlocked(port, header, data, count - 1, TCPC_TX_SOP_PRIME);
+
+ return 0;
+}
+
+static const struct typec_cable_ops tcpm_cable_ops = {
+ .enter = tcpm_cable_altmode_enter,
+ .exit = tcpm_cable_altmode_exit,
+ .vdm = tcpm_cable_altmode_vdm,
+};
+
/*
* PD (data, control) command handling functions
*/
@@ -7507,6 +7591,8 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
typec_port_register_altmodes(port->typec_port,
&tcpm_altmode_ops, port,
port->port_altmode, ALTMODE_DISCOVERY_MAX);
+ typec_port_register_cable_ops(port->port_altmode, ARRAY_SIZE(port->port_altmode),
+ &tcpm_cable_ops);
port->registered = true;

mutex_lock(&port->lock);
--
2.43.0.472.g3155946c3a-goog