From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 7893f9e1c26d1f9ea02622902ee671de45ad377b ]
Some tcpc device-drivers need to explicitly be told to watch for connection events, otherwise the tcpc will not generate any TCPM_CC_EVENTs and devices being plugged into the Type-C port will not be noticed.
For dual-role ports tcpm_start_drp_toggling() is used to tell the tcpc to watch for connection events. Sofar we lack a similar callback to the tcpc for single-role ports. With some tcpc-s such as the fusb302 this means no TCPM_CC_EVENTs will be generated when the port is configured as a single-role port.
This commit renames start_drp_toggling to start_toggling and since the device-properties are parsed by the tcpm-core, adds a port_type parameter to the start_toggling callback so that the tcpc_dev driver knows the port-type and can act accordingly when it starts toggling.
The new start_toggling callback now always gets called if defined, instead of only being called for DRP ports.
To avoid this causing undesirable functional changes all existing start_drp_toggling implementations are not only renamed to start_toggling, but also get a port_type check added and return -EOPNOTSUPP when port_type is not DRP.
Fixes: ea3b4d5523bc("usb: typec: fusb302: Resolve fixed power role ...") Cc: Adam Thomson Adam.Thomson.Opensource@diasemi.com Signed-off-by: Hans de Goede hdegoede@redhat.com Reviewed-by: Guenter Roeck linux@roeck-us.net Acked-by: Heikki Krogerus heikki.krogerus@linux.intel.com Tested-by: Adam Thomson Adam.Thomson.Opensource@diasemi.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/typec/fusb302/fusb302.c | 10 ++++++--- drivers/usb/typec/tcpci.c | 10 ++++++--- drivers/usb/typec/tcpm.c | 32 +++++++++++++---------------- drivers/usb/typec/typec_wcove.c | 10 ++++++--- include/linux/usb/tcpm.h | 13 ++++++------ 5 files changed, 42 insertions(+), 33 deletions(-)
diff --git a/drivers/usb/typec/fusb302/fusb302.c b/drivers/usb/typec/fusb302/fusb302.c index 62a0060d39d8d..c749ce486ec85 100644 --- a/drivers/usb/typec/fusb302/fusb302.c +++ b/drivers/usb/typec/fusb302/fusb302.c @@ -990,13 +990,17 @@ done: return ret; }
-static int tcpm_start_drp_toggling(struct tcpc_dev *dev, - enum typec_cc_status cc) +static int tcpm_start_toggling(struct tcpc_dev *dev, + enum typec_port_type port_type, + enum typec_cc_status cc) { struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, tcpc_dev); int ret = 0;
+ if (port_type != TYPEC_PORT_DRP) + return -EOPNOTSUPP; + mutex_lock(&chip->lock); ret = fusb302_set_src_current(chip, cc_src_current[cc]); if (ret < 0) { @@ -1206,7 +1210,7 @@ static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) fusb302_tcpc_dev->set_vbus = tcpm_set_vbus; fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx; fusb302_tcpc_dev->set_roles = tcpm_set_roles; - fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling; + fusb302_tcpc_dev->start_toggling = tcpm_start_toggling; fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit; }
diff --git a/drivers/usb/typec/tcpci.c b/drivers/usb/typec/tcpci.c index ac6b418b15f1f..c1f7073a56de7 100644 --- a/drivers/usb/typec/tcpci.c +++ b/drivers/usb/typec/tcpci.c @@ -100,13 +100,17 @@ static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) return 0; }
-static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc, - enum typec_cc_status cc) +static int tcpci_start_toggling(struct tcpc_dev *tcpc, + enum typec_port_type port_type, + enum typec_cc_status cc) { int ret; struct tcpci *tcpci = tcpc_to_tcpci(tcpc); unsigned int reg = TCPC_ROLE_CTRL_DRP;
+ if (port_type != TYPEC_PORT_DRP) + return -EOPNOTSUPP; + /* Handle vendor drp toggling */ if (tcpci->data->start_drp_toggling) { ret = tcpci->data->start_drp_toggling(tcpci, tcpci->data, cc); @@ -511,7 +515,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.get_cc = tcpci_get_cc; tcpci->tcpc.set_polarity = tcpci_set_polarity; tcpci->tcpc.set_vconn = tcpci_set_vconn; - tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling; + tcpci->tcpc.start_toggling = tcpci_start_toggling;
tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx; tcpci->tcpc.set_roles = tcpci_set_roles; diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c index 39cf190012393..29d72e9b0f017 100644 --- a/drivers/usb/typec/tcpm.c +++ b/drivers/usb/typec/tcpm.c @@ -31,7 +31,7 @@
#define FOREACH_STATE(S) \ S(INVALID_STATE), \ - S(DRP_TOGGLING), \ + S(TOGGLING), \ S(SRC_UNATTACHED), \ S(SRC_ATTACH_WAIT), \ S(SRC_ATTACHED), \ @@ -473,7 +473,7 @@ static void tcpm_log(struct tcpm_port *port, const char *fmt, ...) /* Do not log while disconnected and unattached */ if (tcpm_port_is_disconnected(port) && (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED || - port->state == DRP_TOGGLING)) + port->state == TOGGLING)) return;
va_start(args, fmt); @@ -2561,20 +2561,16 @@ static int tcpm_set_charge(struct tcpm_port *port, bool charge) return 0; }
-static bool tcpm_start_drp_toggling(struct tcpm_port *port, - enum typec_cc_status cc) +static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc) { int ret;
- if (port->tcpc->start_drp_toggling && - port->port_type == TYPEC_PORT_DRP) { - tcpm_log_force(port, "Start DRP toggling"); - ret = port->tcpc->start_drp_toggling(port->tcpc, cc); - if (!ret) - return true; - } + if (!port->tcpc->start_toggling) + return false;
- return false; + tcpm_log_force(port, "Start toggling"); + ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc); + return ret == 0; }
static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc) @@ -2868,15 +2864,15 @@ static void run_state_machine(struct tcpm_port *port)
port->enter_state = port->state; switch (port->state) { - case DRP_TOGGLING: + case TOGGLING: break; /* SRC states */ case SRC_UNATTACHED: if (!port->non_pd_role_swap) tcpm_swap_complete(port, -ENOTCONN); tcpm_src_detach(port); - if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) { - tcpm_set_state(port, DRP_TOGGLING, 0); + if (tcpm_start_toggling(port, tcpm_rp_cc(port))) { + tcpm_set_state(port, TOGGLING, 0); break; } tcpm_set_cc(port, tcpm_rp_cc(port)); @@ -3074,8 +3070,8 @@ static void run_state_machine(struct tcpm_port *port) tcpm_swap_complete(port, -ENOTCONN); tcpm_pps_complete(port, -ENOTCONN); tcpm_snk_detach(port); - if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) { - tcpm_set_state(port, DRP_TOGGLING, 0); + if (tcpm_start_toggling(port, TYPEC_CC_RD)) { + tcpm_set_state(port, TOGGLING, 0); break; } tcpm_set_cc(port, TYPEC_CC_RD); @@ -3642,7 +3638,7 @@ static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, : "connected");
switch (port->state) { - case DRP_TOGGLING: + case TOGGLING: if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || tcpm_port_is_source(port)) tcpm_set_state(port, SRC_ATTACH_WAIT, 0); diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c index 6770afd407654..f1f8f45e2f3dc 100644 --- a/drivers/usb/typec/typec_wcove.c +++ b/drivers/usb/typec/typec_wcove.c @@ -416,12 +416,16 @@ static int wcove_pd_transmit(struct tcpc_dev *tcpc, return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START); }
-static int wcove_start_drp_toggling(struct tcpc_dev *tcpc, - enum typec_cc_status cc) +static int wcove_start_toggling(struct tcpc_dev *tcpc, + enum typec_port_type port_type, + enum typec_cc_status cc) { struct wcove_typec *wcove = tcpc_to_wcove(tcpc); unsigned int usbc_ctrl;
+ if (port_type != TYPEC_PORT_DRP) + return -EOPNOTSUPP; + usbc_ctrl = USBC_CONTROL1_MODE_DRP | USBC_CONTROL1_DRPTOGGLE_RANDOM;
switch (cc) { @@ -642,7 +646,7 @@ static int wcove_typec_probe(struct platform_device *pdev) wcove->tcpc.set_polarity = wcove_set_polarity; wcove->tcpc.set_vconn = wcove_set_vconn; wcove->tcpc.set_current_limit = wcove_set_current_limit; - wcove->tcpc.start_drp_toggling = wcove_start_drp_toggling; + wcove->tcpc.start_toggling = wcove_start_toggling;
wcove->tcpc.set_pd_rx = wcove_set_pd_rx; wcove->tcpc.set_roles = wcove_set_roles; diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h index 50c74a77db55c..8cb93aff69f1e 100644 --- a/include/linux/usb/tcpm.h +++ b/include/linux/usb/tcpm.h @@ -121,10 +121,10 @@ struct tcpc_config { * with partner. * @set_pd_rx: Called to enable or disable reception of PD messages * @set_roles: Called to set power and data roles - * @start_drp_toggling: - * Optional; if supported by hardware, called to start DRP - * toggling. DRP toggling is stopped automatically if - * a connection is established. + * @start_toggling: + * Optional; if supported by hardware, called to start dual-role + * toggling or single-role connection detection. Toggling stops + * automatically if a connection is established. * @try_role: Optional; called to set a preferred role * @pd_transmit:Called to transmit PD message * @mux: Pointer to multiplexer data @@ -147,8 +147,9 @@ struct tcpc_dev { int (*set_pd_rx)(struct tcpc_dev *dev, bool on); int (*set_roles)(struct tcpc_dev *dev, bool attached, enum typec_role role, enum typec_data_role data); - int (*start_drp_toggling)(struct tcpc_dev *dev, - enum typec_cc_status cc); + int (*start_toggling)(struct tcpc_dev *dev, + enum typec_port_type port_type, + enum typec_cc_status cc); 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);