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-rw-r--r--drivers/usb/typec/tcpm/tcpm.c229
1 files changed, 226 insertions, 3 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 92806547f485..55535c4f66bf 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -106,6 +106,13 @@
S(VCONN_SWAP_TURN_ON_VCONN), \
S(VCONN_SWAP_TURN_OFF_VCONN), \
\
+ S(FR_SWAP_SEND), \
+ S(FR_SWAP_SEND_TIMEOUT), \
+ S(FR_SWAP_SNK_SRC_TRANSITION_TO_OFF), \
+ S(FR_SWAP_SNK_SRC_NEW_SINK_READY), \
+ S(FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED), \
+ S(FR_SWAP_CANCEL), \
+ \
S(SNK_TRY), \
S(SNK_TRY_WAIT), \
S(SNK_TRY_WAIT_DEBOUNCE), \
@@ -127,6 +134,9 @@
S(GET_PPS_STATUS_SEND), \
S(GET_PPS_STATUS_SEND_TIMEOUT), \
\
+ S(GET_SINK_CAP), \
+ S(GET_SINK_CAP_TIMEOUT), \
+ \
S(ERROR_RECOVERY), \
S(PORT_RESET), \
S(PORT_RESET_WAIT_OFF)
@@ -170,11 +180,25 @@ enum adev_actions {
ADEV_ATTENTION,
};
+/*
+ * Initial current capability of the new source when vSafe5V is applied during PD3.0 Fast Role Swap.
+ * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0,
+ * Version 1.2"
+ */
+enum frs_typec_current {
+ FRS_NOT_SUPPORTED,
+ FRS_DEFAULT_POWER,
+ FRS_5V_1P5A,
+ FRS_5V_3A,
+};
+
/* Events from low level driver */
#define TCPM_CC_EVENT BIT(0)
#define TCPM_VBUS_EVENT BIT(1)
#define TCPM_RESET_EVENT BIT(2)
+#define TCPM_FRS_EVENT BIT(3)
+#define TCPM_SOURCING_VBUS BIT(4)
#define LOG_BUFFER_ENTRIES 1024
#define LOG_BUFFER_ENTRY_SIZE 128
@@ -184,6 +208,8 @@ enum adev_actions {
#define SVID_DISCOVERY_MAX 16
#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
+#define GET_SINK_CAP_RETRY_MS 100
+
struct pd_mode_data {
int svid_index; /* current SVID index */
int nsvids;
@@ -261,6 +287,8 @@ struct tcpm_port {
struct kthread_work state_machine;
struct hrtimer vdm_state_machine_timer;
struct kthread_work vdm_state_machine;
+ struct hrtimer enable_frs_timer;
+ struct kthread_work enable_frs;
bool state_machine_running;
struct completion tx_complete;
@@ -335,6 +363,12 @@ struct tcpm_port {
/* port belongs to a self powered device */
bool self_powered;
+ /* FRS */
+ enum frs_typec_current frs_current;
+
+ /* Sink caps have been queried */
+ bool sink_cap_done;
+
#ifdef CONFIG_DEBUG_FS
struct dentry *dentry;
struct mutex logbuffer_lock; /* log buffer access lock */
@@ -940,6 +974,16 @@ static void mod_vdm_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
}
}
+static void mod_enable_frs_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
+{
+ if (delay_ms) {
+ hrtimer_start(&port->enable_frs_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
+ } else {
+ hrtimer_cancel(&port->enable_frs_timer);
+ kthread_queue_work(port->wq, &port->enable_frs);
+ }
+}
+
static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
unsigned int delay_ms)
{
@@ -1669,6 +1713,9 @@ static void tcpm_pd_data_request(struct tcpm_port *port,
unsigned int cnt = pd_header_cnt_le(msg->header);
unsigned int rev = pd_header_rev_le(msg->header);
unsigned int i;
+ enum frs_typec_current frs_current;
+ bool frs_enable;
+ int ret;
switch (type) {
case PD_DATA_SOURCE_CAP:
@@ -1738,7 +1785,21 @@ static void tcpm_pd_data_request(struct tcpm_port *port,
/* We don't do anything with this at the moment... */
for (i = 0; i < cnt; i++)
port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
+
+ frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >>
+ PDO_FIXED_FRS_CURR_SHIFT;
+ frs_enable = frs_current && (frs_current <= port->frs_current);
+ tcpm_log(port,
+ "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c",
+ frs_current, port->frs_current, frs_enable ? 'y' : 'n');
+ if (frs_enable) {
+ ret = port->tcpc->enable_frs(port->tcpc, true);
+ tcpm_log(port, "Enable FRS %s, ret:%d\n", ret ? "fail" : "success", ret);
+ }
+
port->nr_sink_caps = cnt;
+ port->sink_cap_done = true;
+ tcpm_set_state(port, SNK_READY, 0);
break;
case PD_DATA_VENDOR_DEF:
tcpm_handle_vdm_request(port, msg->payload, cnt);
@@ -1833,6 +1894,9 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
case VCONN_SWAP_WAIT_FOR_VCONN:
tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
break;
+ case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
+ tcpm_set_state(port, FR_SWAP_SNK_SRC_NEW_SINK_READY, 0);
+ break;
default:
break;
}
@@ -1872,6 +1936,13 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
-EAGAIN : -EOPNOTSUPP);
tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
break;
+ case FR_SWAP_SEND:
+ tcpm_set_state(port, FR_SWAP_CANCEL, 0);
+ break;
+ case GET_SINK_CAP:
+ port->sink_cap_done = true;
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
default:
break;
}
@@ -1906,6 +1977,9 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port,
case VCONN_SWAP_SEND:
tcpm_set_state(port, VCONN_SWAP_START, 0);
break;
+ case FR_SWAP_SEND:
+ tcpm_set_state(port, FR_SWAP_SNK_SRC_TRANSITION_TO_OFF, 0);
+ break;
default:
break;
}
@@ -2806,6 +2880,10 @@ static void tcpm_reset_port(struct tcpm_port *port)
port->try_src_count = 0;
port->try_snk_count = 0;
port->usb_type = POWER_SUPPLY_USB_TYPE_C;
+ port->nr_sink_caps = 0;
+ port->sink_cap_done = false;
+ if (port->tcpc->enable_frs)
+ port->tcpc->enable_frs(port->tcpc, false);
power_supply_changed(port->psy);
}
@@ -3356,10 +3434,9 @@ static void run_state_machine(struct tcpm_port *port)
tcpm_swap_complete(port, 0);
tcpm_typec_connect(port);
tcpm_check_send_discover(port);
+ mod_enable_frs_delayed_work(port, 0);
tcpm_pps_complete(port, port->pps_status);
-
power_supply_changed(port->psy);
-
break;
/* Accessory states */
@@ -3383,9 +3460,13 @@ static void run_state_machine(struct tcpm_port *port)
tcpm_set_state(port, HARD_RESET_START, 0);
break;
case HARD_RESET_START:
+ port->sink_cap_done = false;
+ if (port->tcpc->enable_frs)
+ port->tcpc->enable_frs(port->tcpc, false);
port->hard_reset_count++;
port->tcpc->set_pd_rx(port->tcpc, false);
tcpm_unregister_altmodes(port);
+ port->nr_sink_caps = 0;
port->send_discover = true;
if (port->pwr_role == TYPEC_SOURCE)
tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
@@ -3517,6 +3598,35 @@ static void run_state_machine(struct tcpm_port *port)
tcpm_set_state(port, ready_state(port), 0);
break;
+ case FR_SWAP_SEND:
+ if (tcpm_pd_send_control(port, PD_CTRL_FR_SWAP)) {
+ tcpm_set_state(port, ERROR_RECOVERY, 0);
+ break;
+ }
+ tcpm_set_state_cond(port, FR_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE);
+ break;
+ case FR_SWAP_SEND_TIMEOUT:
+ tcpm_set_state(port, ERROR_RECOVERY, 0);
+ break;
+ case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
+ tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_OFF);
+ break;
+ case FR_SWAP_SNK_SRC_NEW_SINK_READY:
+ if (port->vbus_source)
+ tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
+ else
+ tcpm_set_state(port, ERROR_RECOVERY, PD_T_RECEIVER_RESPONSE);
+ break;
+ case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
+ tcpm_set_pwr_role(port, TYPEC_SOURCE);
+ if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
+ tcpm_set_state(port, ERROR_RECOVERY, 0);
+ break;
+ }
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+ tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START);
+ break;
+
/* PR_Swap states */
case PR_SWAP_ACCEPT:
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
@@ -3640,6 +3750,12 @@ static void run_state_machine(struct tcpm_port *port)
else
tcpm_set_state(port, SNK_READY, 0);
break;
+ case FR_SWAP_CANCEL:
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(port, SRC_READY, 0);
+ else
+ tcpm_set_state(port, SNK_READY, 0);
+ break;
case BIST_RX:
switch (BDO_MODE_MASK(port->bist_request)) {
@@ -3674,6 +3790,14 @@ static void run_state_machine(struct tcpm_port *port)
case GET_PPS_STATUS_SEND_TIMEOUT:
tcpm_set_state(port, ready_state(port), 0);
break;
+ case GET_SINK_CAP:
+ tcpm_pd_send_control(port, PD_CTRL_GET_SINK_CAP);
+ tcpm_set_state(port, GET_SINK_CAP_TIMEOUT, PD_T_SENDER_RESPONSE);
+ break;
+ case GET_SINK_CAP_TIMEOUT:
+ port->sink_cap_done = true;
+ tcpm_set_state(port, ready_state(port), 0);
+ break;
case ERROR_RECOVERY:
tcpm_swap_complete(port, -EPROTO);
tcpm_pps_complete(port, -EPROTO);
@@ -3889,6 +4013,13 @@ static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
* Ignore it.
*/
break;
+ case FR_SWAP_SEND:
+ case FR_SWAP_SEND_TIMEOUT:
+ case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
+ case FR_SWAP_SNK_SRC_NEW_SINK_READY:
+ case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
+ /* Do nothing, CC change expected */
+ break;
case PORT_RESET:
case PORT_RESET_WAIT_OFF:
@@ -3959,6 +4090,9 @@ static void _tcpm_pd_vbus_on(struct tcpm_port *port)
case SRC_TRY_DEBOUNCE:
/* Do nothing, waiting for sink detection */
break;
+ case FR_SWAP_SNK_SRC_NEW_SINK_READY:
+ tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
+ break;
case PORT_RESET:
case PORT_RESET_WAIT_OFF:
@@ -4038,6 +4172,14 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
*/
break;
+ case FR_SWAP_SEND:
+ case FR_SWAP_SEND_TIMEOUT:
+ case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
+ case FR_SWAP_SNK_SRC_NEW_SINK_READY:
+ case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
+ /* Do nothing, vbus drop expected */
+ break;
+
default:
if (port->pwr_role == TYPEC_SINK &&
port->attached)
@@ -4092,6 +4234,25 @@ static void tcpm_pd_event_handler(struct kthread_work *work)
if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
_tcpm_cc_change(port, cc1, cc2);
}
+ if (events & TCPM_FRS_EVENT) {
+ if (port->state == SNK_READY)
+ tcpm_set_state(port, FR_SWAP_SEND, 0);
+ else
+ tcpm_log(port, "Discarding FRS_SIGNAL! Not in sink ready");
+ }
+ if (events & TCPM_SOURCING_VBUS) {
+ tcpm_log(port, "sourcing vbus");
+ /*
+ * In fast role swap case TCPC autonomously sources vbus. Set vbus_source
+ * true as TCPM wouldn't have called tcpm_set_vbus.
+ *
+ * When vbus is sourced on the command on TCPM i.e. TCPM called
+ * tcpm_set_vbus to source vbus, vbus_source would already be true.
+ */
+ port->vbus_source = true;
+ _tcpm_pd_vbus_on(port);
+ }
+
spin_lock(&port->pd_event_lock);
}
spin_unlock(&port->pd_event_lock);
@@ -4125,6 +4286,50 @@ void tcpm_pd_hard_reset(struct tcpm_port *port)
}
EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
+void tcpm_sink_frs(struct tcpm_port *port)
+{
+ spin_lock(&port->pd_event_lock);
+ port->pd_events = TCPM_FRS_EVENT;
+ spin_unlock(&port->pd_event_lock);
+ kthread_queue_work(port->wq, &port->event_work);
+}
+EXPORT_SYMBOL_GPL(tcpm_sink_frs);
+
+void tcpm_sourcing_vbus(struct tcpm_port *port)
+{
+ spin_lock(&port->pd_event_lock);
+ port->pd_events = TCPM_SOURCING_VBUS;
+ spin_unlock(&port->pd_event_lock);
+ kthread_queue_work(port->wq, &port->event_work);
+}
+EXPORT_SYMBOL_GPL(tcpm_sourcing_vbus);
+
+static void tcpm_enable_frs_work(struct kthread_work *work)
+{
+ struct tcpm_port *port = container_of(work, struct tcpm_port, enable_frs);
+
+ mutex_lock(&port->lock);
+ /* Not FRS capable */
+ if (!port->connected || port->port_type != TYPEC_PORT_DRP ||
+ port->pwr_opmode != TYPEC_PWR_MODE_PD ||
+ !port->tcpc->enable_frs ||
+ /* Sink caps queried */
+ port->sink_cap_done || port->negotiated_rev < PD_REV30)
+ goto unlock;
+
+ /* Send when the state machine is idle */
+ if (port->state != SNK_READY || port->vdm_state != VDM_STATE_DONE || port->send_discover)
+ goto resched;
+
+ tcpm_set_state(port, GET_SINK_CAP, 0);
+ port->sink_cap_done = true;
+
+resched:
+ mod_enable_frs_delayed_work(port, GET_SINK_CAP_RETRY_MS);
+unlock:
+ mutex_unlock(&port->lock);
+}
+
static int tcpm_dr_set(struct typec_port *p, enum typec_data_role data)
{
struct tcpm_port *port = typec_get_drvdata(p);
@@ -4532,7 +4737,7 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
{
const char *cap_str;
int ret;
- u32 mw;
+ u32 mw, frs_current;
if (!fwnode)
return -EINVAL;
@@ -4601,6 +4806,13 @@ sink:
port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
+ /* FRS can only be supported byb DRP ports */
+ if (port->port_type == TYPEC_PORT_DRP) {
+ ret = fwnode_property_read_u32(fwnode, "frs-typec-current", &frs_current);
+ if (ret >= 0 && frs_current <= FRS_5V_3A)
+ port->frs_current = frs_current;
+ }
+
return 0;
}
@@ -4845,6 +5057,14 @@ static enum hrtimer_restart vdm_state_machine_timer_handler(struct hrtimer *time
return HRTIMER_NORESTART;
}
+static enum hrtimer_restart enable_frs_timer_handler(struct hrtimer *timer)
+{
+ struct tcpm_port *port = container_of(timer, struct tcpm_port, enable_frs_timer);
+
+ kthread_queue_work(port->wq, &port->enable_frs);
+ return HRTIMER_NORESTART;
+}
+
struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
{
struct tcpm_port *port;
@@ -4874,10 +5094,13 @@ struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
kthread_init_work(&port->state_machine, tcpm_state_machine_work);
kthread_init_work(&port->vdm_state_machine, vdm_state_machine_work);
kthread_init_work(&port->event_work, tcpm_pd_event_handler);
+ kthread_init_work(&port->enable_frs, tcpm_enable_frs_work);
hrtimer_init(&port->state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
port->state_machine_timer.function = state_machine_timer_handler;
hrtimer_init(&port->vdm_state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
port->vdm_state_machine_timer.function = vdm_state_machine_timer_handler;
+ hrtimer_init(&port->enable_frs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ port->enable_frs_timer.function = enable_frs_timer_handler;
spin_lock_init(&port->pd_event_lock);
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2025-02-02 18:34:45 +0000