TCPM supports BIST carried mode. PD compliance tests require
BIST Test Data to be supported as well.
Introducing set_bist_data callback to signal tcpc driver for
configuring the port controller hardware to enable/disable
BIST Test Data mode.
Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
---
Version history:
Changes since V1:(Guenter's suggestions)
- Split the change into two: TCPM and TCPCI
- Move BIST log to TCPM log
Changes since V2:(Guenter's suggestions)
- Re-ordered patchset
- Included Reviewed-by tag
---
drivers/usb/typec/tcpm/tcpm.c | 11 +++++++++++
include/linux/usb/tcpm.h | 2 ++
2 files changed, 13 insertions(+)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 82b19ebd7838e0..379fcab9dbd973 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -2746,6 +2746,11 @@ static void tcpm_detach(struct tcpm_port *port)
if (!port->attached)
return;
+ if (port->tcpc->set_bist_data) {
+ tcpm_log(port, "disable BIST MODE TESTDATA");
+ port->tcpc->set_bist_data(port->tcpc, false);
+ }
+
if (tcpm_port_is_disconnected(port))
port->hard_reset_count = 0;
@@ -3555,6 +3560,12 @@ static void run_state_machine(struct tcpm_port *port)
case BDO_MODE_CARRIER2:
tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
break;
+ case BDO_MODE_TESTDATA:
+ if (port->tcpc->set_bist_data) {
+ tcpm_log(port, "Enable BIST MODE TESTDATA");
+ port->tcpc->set_bist_data(port->tcpc, true);
+ }
+ break;
default:
break;
}
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index e7979c01c3517c..89f58760cf4800 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -79,6 +79,7 @@ enum tcpm_transmit_type {
* @try_role: Optional; called to set a preferred role
* @pd_transmit:Called to transmit PD message
* @mux: Pointer to multiplexer data
+ * @set_bist_data: Turn on/off bist data mode for compliance testing
*/
struct tcpc_dev {
struct fwnode_handle *fwnode;
@@ -103,6 +104,7 @@ struct tcpc_dev {
int (*try_role)(struct tcpc_dev *dev, int role);
int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type,
const struct pd_message *msg);
+ int (*set_bist_data)(struct tcpc_dev *dev, bool on);
};
struct tcpm_port;
--
2.27.0.389.gc38d7665816-goog
Port starts to toggle when transitioning to unattached state.
This is incorrect while in BIST mode.
6.4.3.1 BIST Carrier Mode
Upon receipt of a BIST Message, with a BIST Carrier Mode BIST Data Object,
the UUT Shall send out a continuous string of BMC encoded alternating "1"s
and “0”s. The UUT Shall exit the Continuous BIST Mode within
tBISTContMode of this Continuous BIST Mode being enabled(see
Section 6.6.7.2).
6.4.3.2 BIST Test Data
Upon receipt of a BIST Message, with a BIST Test Data BIST Data Object,
the UUT Shall return a GoodCRC Message and Shall enter a test mode in which
it sends no further Messages except for GoodCRC Messages in response to
received Messages. See Section 5.9.2 for the definition of the Test Data
Frame. The test Shall be ended by sending Hard Reset Signaling to reset the
UUT.
Signed-off-by: Badhri Jagan Sridharan <[email protected]>
---
Version history:
Changes since V1:
- None
Changes since V2:(Guenter's suggestions)
- Fixed formatting error
- Reduced timeout to 50ms
---
drivers/usb/typec/tcpm/tcpm.c | 7 +++++--
include/linux/usb/pd.h | 1 +
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 379fcab9dbd973..38b958a9650104 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3559,6 +3559,8 @@ static void run_state_machine(struct tcpm_port *port)
switch (BDO_MODE_MASK(port->bist_request)) {
case BDO_MODE_CARRIER2:
tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
+ tcpm_set_state(port, unattached_state(port),
+ PD_T_BIST_CONT_MODE);
break;
case BDO_MODE_TESTDATA:
if (port->tcpc->set_bist_data) {
@@ -3569,8 +3571,6 @@ static void run_state_machine(struct tcpm_port *port)
default:
break;
}
- /* Always switch to unattached state */
- tcpm_set_state(port, unattached_state(port), 0);
break;
case GET_STATUS_SEND:
tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
@@ -3960,6 +3960,9 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
static void _tcpm_pd_hard_reset(struct tcpm_port *port)
{
tcpm_log_force(port, "Received hard reset");
+ if (port->bist_request == BDO_MODE_TESTDATA && port->tcpc->set_bist_data)
+ port->tcpc->set_bist_data(port->tcpc, false);
+
/*
* If we keep receiving hard reset requests, executing the hard reset
* must have failed. Revert to error recovery if that happens.
diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h
index a665d7f211424d..b6c233e79bd457 100644
--- a/include/linux/usb/pd.h
+++ b/include/linux/usb/pd.h
@@ -483,4 +483,5 @@ static inline unsigned int rdo_max_power(u32 rdo)
#define PD_N_CAPS_COUNT (PD_T_NO_RESPONSE / PD_T_SEND_SOURCE_CAP)
#define PD_N_HARD_RESET_COUNT 2
+#define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */
#endif /* __LINUX_USB_PD_H */
--
2.27.0.389.gc38d7665816-goog
On 7/15/20 8:41 PM, Badhri Jagan Sridharan wrote:
> Port starts to toggle when transitioning to unattached state.
> This is incorrect while in BIST mode.
>
> 6.4.3.1 BIST Carrier Mode
> Upon receipt of a BIST Message, with a BIST Carrier Mode BIST Data Object,
> the UUT Shall send out a continuous string of BMC encoded alternating "1"s
> and “0”s. The UUT Shall exit the Continuous BIST Mode within
> tBISTContMode of this Continuous BIST Mode being enabled(see
> Section 6.6.7.2).
>
> 6.4.3.2 BIST Test Data
> Upon receipt of a BIST Message, with a BIST Test Data BIST Data Object,
> the UUT Shall return a GoodCRC Message and Shall enter a test mode in which
> it sends no further Messages except for GoodCRC Messages in response to
> received Messages. See Section 5.9.2 for the definition of the Test Data
> Frame. The test Shall be ended by sending Hard Reset Signaling to reset the
> UUT.
>
> Signed-off-by: Badhri Jagan Sridharan <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
> ---
> Version history:
> Changes since V1:
> - None
>
> Changes since V2:(Guenter's suggestions)
> - Fixed formatting error
> - Reduced timeout to 50ms
>
> ---
> drivers/usb/typec/tcpm/tcpm.c | 7 +++++--
> include/linux/usb/pd.h | 1 +
> 2 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 379fcab9dbd973..38b958a9650104 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -3559,6 +3559,8 @@ static void run_state_machine(struct tcpm_port *port)
> switch (BDO_MODE_MASK(port->bist_request)) {
> case BDO_MODE_CARRIER2:
> tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
> + tcpm_set_state(port, unattached_state(port),
> + PD_T_BIST_CONT_MODE);
> break;
> case BDO_MODE_TESTDATA:
> if (port->tcpc->set_bist_data) {
> @@ -3569,8 +3571,6 @@ static void run_state_machine(struct tcpm_port *port)
> default:
> break;
> }
> - /* Always switch to unattached state */
> - tcpm_set_state(port, unattached_state(port), 0);
> break;
> case GET_STATUS_SEND:
> tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
> @@ -3960,6 +3960,9 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
> static void _tcpm_pd_hard_reset(struct tcpm_port *port)
> {
> tcpm_log_force(port, "Received hard reset");
> + if (port->bist_request == BDO_MODE_TESTDATA && port->tcpc->set_bist_data)
> + port->tcpc->set_bist_data(port->tcpc, false);
> +
> /*
> * If we keep receiving hard reset requests, executing the hard reset
> * must have failed. Revert to error recovery if that happens.
> diff --git a/include/linux/usb/pd.h b/include/linux/usb/pd.h
> index a665d7f211424d..b6c233e79bd457 100644
> --- a/include/linux/usb/pd.h
> +++ b/include/linux/usb/pd.h
> @@ -483,4 +483,5 @@ static inline unsigned int rdo_max_power(u32 rdo)
> #define PD_N_CAPS_COUNT (PD_T_NO_RESPONSE / PD_T_SEND_SOURCE_CAP)
> #define PD_N_HARD_RESET_COUNT 2
>
> +#define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */
> #endif /* __LINUX_USB_PD_H */
>