--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * USB Power Delivery protocol stack.
+ */
+
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <dm/device-internal.h>
+#include <dm/devres.h>
+#include <linux/compat.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/iopoll.h>
+#include <time.h>
+#include <usb/tcpm.h>
+#include "tcpm-internal.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const char * const tcpm_states[] = {
+ FOREACH_TCPM_STATE(GENERATE_TCPM_STRING)
+};
+
+const char * const typec_pd_rev_name[] = {
+ [PD_REV10] = "rev1",
+ [PD_REV20] = "rev2",
+ [PD_REV30] = "rev3",
+};
+
+const char * const typec_role_name[] = {
+ [TYPEC_SINK] = "sink",
+ [TYPEC_SOURCE] = "source",
+};
+
+const char * const typec_data_role_name[] = {
+ [TYPEC_DEVICE] = "device",
+ [TYPEC_HOST] = "host",
+};
+
+const char * const typec_orientation_name[] = {
+ [TYPEC_ORIENTATION_NONE] = "none",
+ [TYPEC_ORIENTATION_NORMAL] = "normal",
+ [TYPEC_ORIENTATION_REVERSE] = "reverse",
+};
+
+const char * const typec_cc_status_name[] = {
+ [TYPEC_CC_OPEN] = "open",
+ [TYPEC_CC_RA] = "ra",
+ [TYPEC_CC_RD] = "rd",
+ [TYPEC_CC_RP_DEF] = "rp-def",
+ [TYPEC_CC_RP_1_5] = "rp-1.5",
+ [TYPEC_CC_RP_3_0] = "rp-3.0",
+};
+
+static inline bool tcpm_cc_is_sink(enum typec_cc_status cc)
+{
+ return cc == TYPEC_CC_RP_DEF ||
+ cc == TYPEC_CC_RP_1_5 ||
+ cc == TYPEC_CC_RP_3_0;
+}
+
+static inline bool tcpm_port_is_sink(struct tcpm_port *port)
+{
+ bool cc1_is_snk = tcpm_cc_is_sink(port->cc1);
+ bool cc2_is_snk = tcpm_cc_is_sink(port->cc2);
+
+ return (cc1_is_snk && !cc2_is_snk) ||
+ (cc2_is_snk && !cc1_is_snk);
+}
+
+static inline bool tcpm_cc_is_source(enum typec_cc_status cc)
+{
+ return cc == TYPEC_CC_RD;
+}
+
+static inline bool tcpm_port_is_source(struct tcpm_port *port)
+{
+ bool cc1_is_src = tcpm_cc_is_source(port->cc1);
+ bool cc2_is_src = tcpm_cc_is_source(port->cc2);
+
+ return (cc1_is_src && !cc2_is_src) ||
+ (cc2_is_src && !cc1_is_src);
+}
+
+static inline bool tcpm_try_src(struct tcpm_port *port)
+{
+ return port->try_role == TYPEC_SOURCE &&
+ port->port_type == TYPEC_PORT_DRP;
+}
+
+static inline void tcpm_reset_event_cnt(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ port->poll_event_cnt = 0;
+}
+
+static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
+{
+ if (port->port_type == TYPEC_PORT_DRP) {
+ if (port->try_role == TYPEC_SINK)
+ return SNK_UNATTACHED;
+ else if (port->try_role == TYPEC_SOURCE)
+ return SRC_UNATTACHED;
+ } else if (port->port_type == TYPEC_PORT_SNK) {
+ return SNK_UNATTACHED;
+ }
+ return SRC_UNATTACHED;
+}
+
+static bool tcpm_port_is_disconnected(struct tcpm_port *port)
+{
+ return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
+ port->cc2 == TYPEC_CC_OPEN) ||
+ (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
+ port->cc1 == TYPEC_CC_OPEN) ||
+ (port->polarity == TYPEC_POLARITY_CC2 &&
+ port->cc2 == TYPEC_CC_OPEN)));
+}
+
+static void tcpm_set_cc(struct udevice *dev, enum typec_cc_status cc)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ dev_dbg(dev, "TCPM: set cc = %d\n", cc);
+ port->cc_req = cc;
+ drvops->set_cc(dev, cc);
+}
+
+/*
+ * Determine RP value to set based on maximum current supported
+ * by a port if configured as source.
+ * Returns CC value to report to link partner.
+ */
+static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
+{
+ const u32 *src_pdo = port->src_pdo;
+ int nr_pdo = port->nr_src_pdo;
+ int i;
+
+ /*
+ * Search for first entry with matching voltage.
+ * It should report the maximum supported current.
+ */
+ for (i = 0; i < nr_pdo; i++) {
+ const u32 pdo = src_pdo[i];
+
+ if (pdo_type(pdo) == PDO_TYPE_FIXED &&
+ pdo_fixed_voltage(pdo) == 5000) {
+ unsigned int curr = pdo_max_current(pdo);
+
+ if (curr >= 3000)
+ return TYPEC_CC_RP_3_0;
+ else if (curr >= 1500)
+ return TYPEC_CC_RP_1_5;
+ return TYPEC_CC_RP_DEF;
+ }
+ }
+
+ return TYPEC_CC_RP_DEF;
+}
+
+static void tcpm_check_and_run_delayed_work(struct udevice *dev);
+
+static bool tcpm_transmit_helper(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ drvops->poll_event(dev);
+ udelay(500);
+ tcpm_check_and_run_delayed_work(dev);
+ return port->tx_complete;
+}
+
+static int tcpm_pd_transmit(struct udevice *dev,
+ enum tcpm_transmit_type type,
+ const struct pd_message *msg)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ u32 timeout_us = PD_T_TCPC_TX_TIMEOUT * 1000;
+ bool tx_complete;
+ int ret;
+
+ if (msg)
+ dev_dbg(dev, "TCPM: PD TX, header: %#x\n",
+ le16_to_cpu(msg->header));
+ else
+ dev_dbg(dev, "TCPM: PD TX, type: %#x\n", type);
+
+ port->tx_complete = false;
+ ret = drvops->pd_transmit(dev, type, msg, port->negotiated_rev);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * At this point we basically need to block until the TCPM controller
+ * returns successful transmission. Since this is usually done using
+ * the generic interrupt status bits, we poll for any events. That
+ * will clear the interrupt status, so we also need to process any
+ * of the incoming events. This means we will do more processing and
+ * thus let's give everything a bit more time.
+ */
+ timeout_us *= 5;
+ ret = read_poll_timeout(tcpm_transmit_helper, tx_complete,
+ !tx_complete, false, timeout_us, dev);
+ if (ret < 0) {
+ dev_err(dev, "TCPM: PD transmit data failed: %d\n", ret);
+ return ret;
+ }
+
+ switch (port->tx_status) {
+ case TCPC_TX_SUCCESS:
+ port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
+ break;
+ case TCPC_TX_DISCARDED:
+ ret = -EAGAIN;
+ break;
+ case TCPC_TX_FAILED:
+ default:
+ ret = -EIO;
+ break;
+ }
+
+ return ret;
+}
+
+void tcpm_pd_transmit_complete(struct udevice *dev,
+ enum tcpm_transmit_status status)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ dev_dbg(dev, "TCPM: PD TX complete, status: %u\n", status);
+ tcpm_reset_event_cnt(dev);
+ port->tx_status = status;
+ port->tx_complete = true;
+}
+
+static int tcpm_set_polarity(struct udevice *dev,
+ enum typec_cc_polarity polarity)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ int ret;
+
+ dev_dbg(dev, "TCPM: set polarity = %d\n", polarity);
+
+ if (drvops->set_polarity) {
+ ret = drvops->set_polarity(dev, polarity);
+ if (ret < 0)
+ return ret;
+ }
+
+ port->polarity = polarity;
+
+ return 0;
+}
+
+static int tcpm_set_vconn(struct udevice *dev, bool enable)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ dev_dbg(dev, "TCPM: set vconn = %d\n", enable);
+
+ ret = drvops->set_vconn(dev, enable);
+ if (!ret)
+ port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
+
+ return ret;
+}
+
+static inline u32 tcpm_get_current_limit(struct tcpm_port *port)
+{
+ switch (port->polarity ? port->cc2 : port->cc1) {
+ case TYPEC_CC_RP_1_5:
+ return 1500;
+ case TYPEC_CC_RP_3_0:
+ return 3000;
+ case TYPEC_CC_RP_DEF:
+ default:
+ return 0;
+ }
+}
+
+static int tcpm_set_current_limit(struct udevice *dev, u32 max_ma, u32 mv)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret = -EOPNOTSUPP;
+
+ dev_info(dev, "TCPM: set voltage limit = %u mV\n", mv);
+ dev_info(dev, "TCPM: set current limit = %u mA\n", max_ma);
+
+ port->supply_voltage = mv;
+ port->current_limit = max_ma;
+
+ return ret;
+}
+
+static int tcpm_set_attached_state(struct udevice *dev, bool attached)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ return drvops->set_roles(dev, attached, port->pwr_role,
+ port->data_role);
+}
+
+static int tcpm_set_roles(struct udevice *dev, bool attached,
+ enum typec_role role, enum typec_data_role data)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ ret = drvops->set_roles(dev, attached, role, data);
+ if (ret < 0)
+ return ret;
+
+ port->pwr_role = role;
+ port->data_role = data;
+
+ return 0;
+}
+
+static int tcpm_pd_send_source_caps(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ struct pd_message msg;
+ int i;
+
+ memset(&msg, 0, sizeof(msg));
+
+ if (!port->nr_src_pdo) {
+ /* No source capabilities defined, sink only */
+ msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 0);
+ } else {
+ msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id,
+ port->nr_src_pdo);
+ }
+
+ for (i = 0; i < port->nr_src_pdo; i++)
+ msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
+
+ return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg);
+}
+
+static int tcpm_pd_send_sink_caps(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ struct pd_message msg;
+ unsigned int i;
+
+ memset(&msg, 0, sizeof(msg));
+
+ if (!port->nr_snk_pdo) {
+ /* No sink capabilities defined, source only */
+ msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 0);
+ } else {
+ msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id,
+ port->nr_snk_pdo);
+ }
+
+ for (i = 0; i < port->nr_snk_pdo; i++)
+ msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
+
+ return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg);
+}
+
+static void tcpm_state_machine(struct udevice *dev);
+
+static inline void tcpm_timer_uninit(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ port->delay_target = 0;
+}
+
+static void tcpm_timer_init(struct udevice *dev, uint32_t ms)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ unsigned long time_us = ms * 1000;
+
+ port->delay_target = timer_get_us() + time_us;
+}
+
+static void tcpm_check_and_run_delayed_work(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ /* no delayed state changes scheduled */
+ if (port->delay_target == 0)
+ return;
+
+ /* it's not yet time */
+ if (timer_get_us() < port->delay_target)
+ return;
+
+ tcpm_timer_uninit(dev);
+ tcpm_state_machine(dev);
+}
+
+static void mod_tcpm_delayed_work(struct udevice *dev, unsigned int delay_ms)
+{
+ if (delay_ms) {
+ tcpm_timer_init(dev, delay_ms);
+ } else {
+ tcpm_timer_uninit(dev);
+ tcpm_state_machine(dev);
+ }
+}
+
+static void tcpm_set_state(struct udevice *dev, enum tcpm_state state,
+ unsigned int delay_ms)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ if (delay_ms) {
+ dev_dbg(dev, "TCPM: pending state change %s -> %s @ %u ms [%s]\n",
+ tcpm_states[port->state], tcpm_states[state], delay_ms,
+ typec_pd_rev_name[port->negotiated_rev]);
+ port->delayed_state = state;
+ mod_tcpm_delayed_work(dev, delay_ms);
+ port->delay_ms = delay_ms;
+ } else {
+ dev_dbg(dev, "TCPM: state change %s -> %s\n",
+ tcpm_states[port->state], tcpm_states[state]);
+ port->delayed_state = INVALID_STATE;
+ port->prev_state = port->state;
+ port->state = state;
+ /*
+ * Don't re-queue the state machine work item if we're currently
+ * in the state machine and we're immediately changing states.
+ * tcpm_state_machine_work() will continue running the state
+ * machine.
+ */
+ if (!port->state_machine_running)
+ mod_tcpm_delayed_work(dev, 0);
+ }
+}
+
+static void tcpm_set_state_cond(struct udevice *dev, enum tcpm_state state,
+ unsigned int delay_ms)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ if (port->enter_state == port->state)
+ tcpm_set_state(dev, state, delay_ms);
+ else
+ dev_dbg(dev, "TCPM: skipped %sstate change %s -> %s [%u ms], context state %s [%s]\n",
+ delay_ms ? "delayed " : "",
+ tcpm_states[port->state], tcpm_states[state],
+ delay_ms, tcpm_states[port->enter_state],
+ typec_pd_rev_name[port->negotiated_rev]);
+}
+
+static void tcpm_queue_message(struct udevice *dev,
+ enum pd_msg_request message)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ port->queued_message = message;
+ mod_tcpm_delayed_work(dev, 0);
+}
+
+enum pdo_err {
+ PDO_NO_ERR,
+ PDO_ERR_NO_VSAFE5V,
+ PDO_ERR_VSAFE5V_NOT_FIRST,
+ PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
+ PDO_ERR_FIXED_NOT_SORTED,
+ PDO_ERR_VARIABLE_BATT_NOT_SORTED,
+ PDO_ERR_DUPE_PDO,
+ PDO_ERR_PPS_APDO_NOT_SORTED,
+ PDO_ERR_DUPE_PPS_APDO,
+};
+
+static const char * const pdo_err_msg[] = {
+ [PDO_ERR_NO_VSAFE5V] =
+ " err: source/sink caps should at least have vSafe5V",
+ [PDO_ERR_VSAFE5V_NOT_FIRST] =
+ " err: vSafe5V Fixed Supply Object Shall always be the first object",
+ [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
+ " err: PDOs should be in the following order: Fixed; Battery; Variable",
+ [PDO_ERR_FIXED_NOT_SORTED] =
+ " err: Fixed supply pdos should be in increasing order of their fixed voltage",
+ [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
+ " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
+ [PDO_ERR_DUPE_PDO] =
+ " err: Variable/Batt supply pdos cannot have same min/max voltage",
+ [PDO_ERR_PPS_APDO_NOT_SORTED] =
+ " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
+ [PDO_ERR_DUPE_PPS_APDO] =
+ " err: Programmable power supply apdos cannot have same min/max voltage and max current",
+};
+
+static enum pdo_err tcpm_caps_err(struct udevice *dev, const u32 *pdo,
+ unsigned int nr_pdo)
+{
+ unsigned int i;
+
+ /* Should at least contain vSafe5v */
+ if (nr_pdo < 1)
+ return PDO_ERR_NO_VSAFE5V;
+
+ /* The vSafe5V Fixed Supply Object Shall always be the first object */
+ if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
+ pdo_fixed_voltage(pdo[0]) != VSAFE5V)
+ return PDO_ERR_VSAFE5V_NOT_FIRST;
+
+ for (i = 1; i < nr_pdo; i++) {
+ if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
+ return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
+ } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
+ enum pd_pdo_type type = pdo_type(pdo[i]);
+
+ switch (type) {
+ /*
+ * The remaining Fixed Supply Objects, if
+ * present, shall be sent in voltage order;
+ * lowest to highest.
+ */
+ case PDO_TYPE_FIXED:
+ if (pdo_fixed_voltage(pdo[i]) <=
+ pdo_fixed_voltage(pdo[i - 1]))
+ return PDO_ERR_FIXED_NOT_SORTED;
+ break;
+ /*
+ * The Battery Supply Objects and Variable
+ * supply, if present shall be sent in Minimum
+ * Voltage order; lowest to highest.
+ */
+ case PDO_TYPE_VAR:
+ case PDO_TYPE_BATT:
+ if (pdo_min_voltage(pdo[i]) <
+ pdo_min_voltage(pdo[i - 1]))
+ return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
+ else if ((pdo_min_voltage(pdo[i]) ==
+ pdo_min_voltage(pdo[i - 1])) &&
+ (pdo_max_voltage(pdo[i]) ==
+ pdo_max_voltage(pdo[i - 1])))
+ return PDO_ERR_DUPE_PDO;
+ break;
+ /*
+ * The Programmable Power Supply APDOs, if present,
+ * shall be sent in Maximum Voltage order;
+ * lowest to highest.
+ */
+ case PDO_TYPE_APDO:
+ if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
+ break;
+
+ if (pdo_pps_apdo_max_voltage(pdo[i]) <
+ pdo_pps_apdo_max_voltage(pdo[i - 1]))
+ return PDO_ERR_PPS_APDO_NOT_SORTED;
+ else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
+ pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
+ pdo_pps_apdo_max_voltage(pdo[i]) ==
+ pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
+ pdo_pps_apdo_max_current(pdo[i]) ==
+ pdo_pps_apdo_max_current(pdo[i - 1]))
+ return PDO_ERR_DUPE_PPS_APDO;
+ break;
+ default:
+ dev_err(dev, "TCPM: Unknown pdo type\n");
+ }
+ }
+ }
+
+ return PDO_NO_ERR;
+}
+
+static int tcpm_validate_caps(struct udevice *dev, const u32 *pdo,
+ unsigned int nr_pdo)
+{
+ enum pdo_err err_index = tcpm_caps_err(dev, pdo, nr_pdo);
+
+ if (err_index != PDO_NO_ERR) {
+ dev_err(dev, "TCPM:%s\n", pdo_err_msg[err_index]);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * PD (data, control) command handling functions
+ */
+static inline enum tcpm_state ready_state(struct tcpm_port *port)
+{
+ if (port->pwr_role == TYPEC_SOURCE)
+ return SRC_READY;
+ else
+ return SNK_READY;
+}
+
+static void tcpm_pd_data_request(struct udevice *dev,
+ const struct pd_message *msg)
+{
+ enum pd_data_msg_type type = pd_header_type_le(msg->header);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ unsigned int cnt = pd_header_cnt_le(msg->header);
+ unsigned int rev = pd_header_rev_le(msg->header);
+ unsigned int i;
+
+ switch (type) {
+ case PD_DATA_SOURCE_CAP:
+ for (i = 0; i < cnt; i++)
+ port->source_caps[i] = le32_to_cpu(msg->payload[i]);
+
+ port->nr_source_caps = cnt;
+
+ tcpm_validate_caps(dev, port->source_caps,
+ port->nr_source_caps);
+
+ /*
+ * Adjust revision in subsequent message headers, as required,
+ * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
+ * support Rev 1.0 so just do nothing in that scenario.
+ */
+ if (rev == PD_REV10)
+ break;
+
+ if (rev < PD_MAX_REV)
+ port->negotiated_rev = rev;
+
+ if ((pdo_type(port->source_caps[0]) == PDO_TYPE_FIXED) &&
+ (port->source_caps[0] & PDO_FIXED_DUAL_ROLE) &&
+ (port->source_caps[0] & PDO_FIXED_DATA_SWAP)) {
+ /* Dual role power and data, eg: self-powered Type-C */
+ port->wait_dr_swap_message = true;
+ } else {
+ /* Non-Dual role power, eg: adapter */
+ port->wait_dr_swap_message = false;
+ }
+
+ /*
+ * This message may be received even if VBUS is not
+ * present. This is quite unexpected; see USB PD
+ * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
+ * However, at the same time, we must be ready to
+ * receive this message and respond to it 15ms after
+ * receiving PS_RDY during power swap operations, no matter
+ * if VBUS is available or not (USB PD specification,
+ * section 6.5.9.2).
+ * So we need to accept the message either way,
+ * but be prepared to keep waiting for VBUS after it was
+ * handled.
+ */
+ tcpm_set_state(dev, SNK_NEGOTIATE_CAPABILITIES, 0);
+ break;
+ case PD_DATA_REQUEST:
+ /*
+ * Adjust revision in subsequent message headers, as required,
+ * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
+ * support Rev 1.0 so just reject in that scenario.
+ */
+ if (rev == PD_REV10) {
+ tcpm_queue_message(dev, PD_MSG_CTRL_REJECT);
+ break;
+ }
+
+ if (rev < PD_MAX_REV)
+ port->negotiated_rev = rev;
+
+ port->sink_request = le32_to_cpu(msg->payload[0]);
+
+ tcpm_set_state(dev, SRC_NEGOTIATE_CAPABILITIES, 0);
+ break;
+ case PD_DATA_SINK_CAP:
+ /* 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]);
+
+ port->nr_sink_caps = cnt;
+ break;
+ default:
+ break;
+ }
+}
+
+static void tcpm_pd_ctrl_request(struct udevice *dev,
+ const struct pd_message *msg)
+{
+ enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ enum tcpm_state next_state;
+
+ switch (type) {
+ case PD_CTRL_GOOD_CRC:
+ case PD_CTRL_PING:
+ break;
+ case PD_CTRL_GET_SOURCE_CAP:
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_queue_message(dev, PD_MSG_DATA_SOURCE_CAP);
+ break;
+ default:
+ tcpm_queue_message(dev, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ break;
+ case PD_CTRL_GET_SINK_CAP:
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_queue_message(dev, PD_MSG_DATA_SINK_CAP);
+ break;
+ default:
+ tcpm_queue_message(dev, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ break;
+ case PD_CTRL_GOTO_MIN:
+ break;
+ case PD_CTRL_PS_RDY:
+ switch (port->state) {
+ case SNK_TRANSITION_SINK:
+ if (port->vbus_present) {
+ tcpm_set_current_limit(dev,
+ port->req_current_limit,
+ port->req_supply_voltage);
+ port->explicit_contract = true;
+ tcpm_set_state(dev, SNK_READY, 0);
+ } else {
+ /*
+ * Seen after power swap. Keep waiting for VBUS
+ * in a transitional state.
+ */
+ tcpm_set_state(dev,
+ SNK_TRANSITION_SINK_VBUS, 0);
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case PD_CTRL_REJECT:
+ case PD_CTRL_WAIT:
+ case PD_CTRL_NOT_SUPP:
+ switch (port->state) {
+ case SNK_NEGOTIATE_CAPABILITIES:
+ /* USB PD specification, Figure 8-43 */
+ if (port->explicit_contract)
+ next_state = SNK_READY;
+ else
+ next_state = SNK_WAIT_CAPABILITIES;
+
+ tcpm_set_state(dev, next_state, 0);
+ break;
+ default:
+ break;
+ }
+ break;
+ case PD_CTRL_ACCEPT:
+ switch (port->state) {
+ case SNK_NEGOTIATE_CAPABILITIES:
+ tcpm_set_state(dev, SNK_TRANSITION_SINK, 0);
+ break;
+ case SOFT_RESET_SEND:
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ if (port->pwr_role == TYPEC_SOURCE)
+ next_state = SRC_SEND_CAPABILITIES;
+ else
+ next_state = SNK_WAIT_CAPABILITIES;
+ tcpm_set_state(dev, next_state, 0);
+ break;
+ default:
+ break;
+ }
+ break;
+ case PD_CTRL_SOFT_RESET:
+ tcpm_set_state(dev, SOFT_RESET, 0);
+ break;
+ case PD_CTRL_DR_SWAP:
+ if (port->port_type != TYPEC_PORT_DRP) {
+ tcpm_queue_message(dev, PD_MSG_CTRL_REJECT);
+ break;
+ }
+ /*
+ * 6.3.9: If an alternate mode is active, a request to swap
+ * alternate modes shall trigger a port reset.
+ */
+ switch (port->state) {
+ case SRC_READY:
+ case SNK_READY:
+ tcpm_set_state(dev, DR_SWAP_ACCEPT, 0);
+ break;
+ default:
+ tcpm_queue_message(dev, PD_MSG_CTRL_WAIT);
+ break;
+ }
+ break;
+ case PD_CTRL_PR_SWAP:
+ case PD_CTRL_VCONN_SWAP:
+ case PD_CTRL_GET_SOURCE_CAP_EXT:
+ case PD_CTRL_GET_STATUS:
+ case PD_CTRL_FR_SWAP:
+ case PD_CTRL_GET_PPS_STATUS:
+ case PD_CTRL_GET_COUNTRY_CODES:
+ /* Currently not supported */
+ dev_err(dev, "TCPM: Currently not supported type %#x\n", type);
+ tcpm_queue_message(dev, PD_MSG_CTRL_NOT_SUPP);
+ break;
+ default:
+ dev_err(dev, "TCPM: Unrecognized ctrl message type %#x\n", type);
+ break;
+ }
+}
+
+static void tcpm_pd_rx_handler(struct udevice *dev,
+ const struct pd_message *msg)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ unsigned int cnt = pd_header_cnt_le(msg->header);
+ bool remote_is_host, local_is_host;
+
+ dev_dbg(dev, "TCPM: PD RX, header: %#x [%d]\n",
+ le16_to_cpu(msg->header), port->attached);
+
+ if (port->attached) {
+ enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
+ unsigned int msgid = pd_header_msgid_le(msg->header);
+
+ /*
+ * USB PD standard, 6.6.1.2:
+ * "... if MessageID value in a received Message is the
+ * same as the stored value, the receiver shall return a
+ * GoodCRC Message with that MessageID value and drop
+ * the Message (this is a retry of an already received
+ * Message). Note: this shall not apply to the Soft_Reset
+ * Message which always has a MessageID value of zero."
+ */
+ if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
+ return;
+ port->rx_msgid = msgid;
+
+ /*
+ * If both ends believe to be DFP/host, we have a data role
+ * mismatch.
+ */
+ remote_is_host = !!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE);
+ local_is_host = port->data_role == TYPEC_HOST;
+ if (remote_is_host == local_is_host) {
+ dev_err(dev, "TCPM: data role mismatch, initiating error recovery\n");
+ tcpm_set_state(dev, ERROR_RECOVERY, 0);
+ } else {
+ if (cnt)
+ tcpm_pd_data_request(dev, msg);
+ else
+ tcpm_pd_ctrl_request(dev, msg);
+ }
+ }
+}
+
+void tcpm_pd_receive(struct udevice *dev, const struct pd_message *msg)
+{
+ tcpm_reset_event_cnt(dev);
+ tcpm_pd_rx_handler(dev, msg);
+}
+
+static int tcpm_pd_send_control(struct udevice *dev,
+ enum pd_ctrl_msg_type type)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ struct pd_message msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header = PD_HEADER_LE(type, port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 0);
+
+ return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg);
+}
+
+/*
+ * Send queued message without affecting state.
+ * Return true if state machine should go back to sleep,
+ * false otherwise.
+ */
+static bool tcpm_send_queued_message(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ enum pd_msg_request queued_message;
+ int max_messages = 100;
+
+ do {
+ queued_message = port->queued_message;
+ port->queued_message = PD_MSG_NONE;
+ max_messages--;
+
+ switch (queued_message) {
+ case PD_MSG_CTRL_WAIT:
+ tcpm_pd_send_control(dev, PD_CTRL_WAIT);
+ break;
+ case PD_MSG_CTRL_REJECT:
+ tcpm_pd_send_control(dev, PD_CTRL_REJECT);
+ break;
+ case PD_MSG_CTRL_NOT_SUPP:
+ tcpm_pd_send_control(dev, PD_CTRL_NOT_SUPP);
+ break;
+ case PD_MSG_DATA_SINK_CAP:
+ tcpm_pd_send_sink_caps(dev);
+ break;
+ case PD_MSG_DATA_SOURCE_CAP:
+ tcpm_pd_send_source_caps(dev);
+ break;
+ default:
+ break;
+ }
+ } while (max_messages > 0 && port->queued_message != PD_MSG_NONE);
+
+ if (!max_messages)
+ dev_err(dev, "Aborted sending of too many queued messages\n");
+
+ return false;
+}
+
+static int tcpm_pd_check_request(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ u32 pdo, rdo = port->sink_request;
+ unsigned int max, op, pdo_max, index;
+ enum pd_pdo_type type;
+
+ index = rdo_index(rdo);
+ if (!index || index > port->nr_src_pdo)
+ return -EINVAL;
+
+ pdo = port->src_pdo[index - 1];
+ type = pdo_type(pdo);
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ case PDO_TYPE_VAR:
+ max = rdo_max_current(rdo);
+ op = rdo_op_current(rdo);
+ pdo_max = pdo_max_current(pdo);
+
+ if (op > pdo_max)
+ return -EINVAL;
+ if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
+ return -EINVAL;
+
+ if (type == PDO_TYPE_FIXED)
+ dev_dbg(dev, "TCPM: Requested %u mV, %u mA for %u / %u mA\n",
+ pdo_fixed_voltage(pdo), pdo_max, op, max);
+ else
+ dev_dbg(dev, "TCPM: Requested %u -> %u mV, %u mA for %u / %u mA\n",
+ pdo_min_voltage(pdo), pdo_max_voltage(pdo),
+ pdo_max, op, max);
+ break;
+ case PDO_TYPE_BATT:
+ max = rdo_max_power(rdo);
+ op = rdo_op_power(rdo);
+ pdo_max = pdo_max_power(pdo);
+
+ if (op > pdo_max)
+ return -EINVAL;
+ if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
+ return -EINVAL;
+ dev_info(dev, "TCPM: Requested %u -> %u mV, %u mW for %u / %u mW\n",
+ pdo_min_voltage(pdo), pdo_max_voltage(pdo),
+ pdo_max, op, max);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
+#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
+
+static int tcpm_pd_select_pdo(struct udevice *dev, int *sink_pdo,
+ int *src_pdo)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
+ max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
+ min_snk_mv = 0;
+ int ret = -EINVAL;
+
+ /*
+ * Select the source PDO providing the most power which has a
+ * matchig sink cap.
+ */
+ for (i = 0; i < port->nr_source_caps; i++) {
+ u32 pdo = port->source_caps[i];
+ enum pd_pdo_type type = pdo_type(pdo);
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ max_src_mv = pdo_fixed_voltage(pdo);
+ min_src_mv = max_src_mv;
+ break;
+ case PDO_TYPE_BATT:
+ case PDO_TYPE_VAR:
+ max_src_mv = pdo_max_voltage(pdo);
+ min_src_mv = pdo_min_voltage(pdo);
+ break;
+ case PDO_TYPE_APDO:
+ continue;
+ default:
+ dev_err(dev, "TCPM: Invalid source PDO type, ignoring\n");
+ continue;
+ }
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ case PDO_TYPE_VAR:
+ src_ma = pdo_max_current(pdo);
+ src_mw = src_ma * min_src_mv / 1000;
+ break;
+ case PDO_TYPE_BATT:
+ src_mw = pdo_max_power(pdo);
+ break;
+ case PDO_TYPE_APDO:
+ continue;
+ default:
+ dev_err(dev, "TCPM: Invalid source PDO type, ignoring\n");
+ continue;
+ }
+
+ for (j = 0; j < port->nr_snk_pdo; j++) {
+ pdo = port->snk_pdo[j];
+
+ switch (pdo_type(pdo)) {
+ case PDO_TYPE_FIXED:
+ max_snk_mv = pdo_fixed_voltage(pdo);
+ min_snk_mv = max_snk_mv;
+ break;
+ case PDO_TYPE_BATT:
+ case PDO_TYPE_VAR:
+ max_snk_mv = pdo_max_voltage(pdo);
+ min_snk_mv = pdo_min_voltage(pdo);
+ break;
+ case PDO_TYPE_APDO:
+ continue;
+ default:
+ dev_err(dev, "TCPM: Invalid sink PDO type, ignoring\n");
+ continue;
+ }
+
+ if (max_src_mv <= max_snk_mv && min_src_mv >= min_snk_mv) {
+ /* Prefer higher voltages if available */
+ if ((src_mw == max_mw && min_src_mv > max_mv) ||
+ src_mw > max_mw) {
+ *src_pdo = i;
+ *sink_pdo = j;
+ max_mw = src_mw;
+ max_mv = min_src_mv;
+ ret = 0;
+ }
+ }
+ }
+ }
+
+ return ret;
+}
+
+static int tcpm_pd_build_request(struct udevice *dev, u32 *rdo)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ unsigned int mv, ma, mw, flags;
+ unsigned int max_ma, max_mw;
+ enum pd_pdo_type type;
+ u32 pdo, matching_snk_pdo;
+ int src_pdo_index = 0;
+ int snk_pdo_index = 0;
+ int ret;
+
+ ret = tcpm_pd_select_pdo(dev, &snk_pdo_index, &src_pdo_index);
+ if (ret < 0)
+ return ret;
+
+ pdo = port->source_caps[src_pdo_index];
+ matching_snk_pdo = port->snk_pdo[snk_pdo_index];
+ type = pdo_type(pdo);
+
+ switch (type) {
+ case PDO_TYPE_FIXED:
+ mv = pdo_fixed_voltage(pdo);
+ break;
+ case PDO_TYPE_BATT:
+ case PDO_TYPE_VAR:
+ mv = pdo_min_voltage(pdo);
+ break;
+ default:
+ dev_err(dev, "TCPM: Invalid PDO selected!\n");
+ return -EINVAL;
+ }
+
+ /* Select maximum available current within the sink pdo's limit */
+ if (type == PDO_TYPE_BATT) {
+ mw = min_power(pdo, matching_snk_pdo);
+ ma = 1000 * mw / mv;
+ } else {
+ ma = min_current(pdo, matching_snk_pdo);
+ mw = ma * mv / 1000;
+ }
+
+ flags = RDO_USB_COMM | RDO_NO_SUSPEND;
+
+ /* Set mismatch bit if offered power is less than operating power */
+ max_ma = ma;
+ max_mw = mw;
+ if (mw < port->operating_snk_mw) {
+ flags |= RDO_CAP_MISMATCH;
+ if (type == PDO_TYPE_BATT &&
+ (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
+ max_mw = pdo_max_power(matching_snk_pdo);
+ else if (pdo_max_current(matching_snk_pdo) >
+ pdo_max_current(pdo))
+ max_ma = pdo_max_current(matching_snk_pdo);
+ }
+
+ dev_dbg(dev, "TCPM: cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d\n",
+ port->cc_req, port->cc1, port->cc2, port->vbus_source,
+ port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
+ port->polarity);
+
+ if (type == PDO_TYPE_BATT) {
+ *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
+
+ dev_info(dev, "TCPM: requesting PDO %d: %u mV, %u mW%s\n",
+ src_pdo_index, mv, mw,
+ flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
+ } else {
+ *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
+
+ dev_info(dev, "TCPM: requesting PDO %d: %u mV, %u mA%s\n",
+ src_pdo_index, mv, ma,
+ flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
+ }
+
+ port->req_current_limit = ma;
+ port->req_supply_voltage = mv;
+
+ return 0;
+}
+
+static int tcpm_pd_send_request(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ struct pd_message msg;
+ int ret;
+ u32 rdo;
+
+ ret = tcpm_pd_build_request(dev, &rdo);
+ if (ret < 0)
+ return ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
+ port->pwr_role,
+ port->data_role,
+ port->negotiated_rev,
+ port->message_id, 1);
+ msg.payload[0] = cpu_to_le32(rdo);
+
+ return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg);
+}
+
+static int tcpm_set_vbus(struct udevice *dev, bool enable)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ int ret;
+
+ if (enable && port->vbus_charge)
+ return -EINVAL;
+
+ dev_dbg(dev, "TCPM: set vbus = %d charge = %d\n",
+ enable, port->vbus_charge);
+
+ ret = drvops->set_vbus(dev, enable, port->vbus_charge);
+ if (ret < 0)
+ return ret;
+
+ port->vbus_source = enable;
+ return 0;
+}
+
+static int tcpm_set_charge(struct udevice *dev, bool charge)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ if (charge && port->vbus_source)
+ return -EINVAL;
+
+ if (charge != port->vbus_charge) {
+ dev_dbg(dev, "TCPM: set vbus = %d charge = %d\n",
+ port->vbus_source, charge);
+ ret = drvops->set_vbus(dev, port->vbus_source,
+ charge);
+ if (ret < 0)
+ return ret;
+ }
+ port->vbus_charge = charge;
+ return 0;
+}
+
+static bool tcpm_start_toggling(struct udevice *dev, enum typec_cc_status cc)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ if (!drvops->start_toggling)
+ return false;
+
+ dev_dbg(dev, "TCPM: Start toggling\n");
+ ret = drvops->start_toggling(dev, port->port_type, cc);
+ return ret == 0;
+}
+
+static int tcpm_init_vbus(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ ret = drvops->set_vbus(dev, false, false);
+ port->vbus_source = false;
+ port->vbus_charge = false;
+ return ret;
+}
+
+static int tcpm_init_vconn(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ ret = drvops->set_vconn(dev, false);
+ port->vconn_role = TYPEC_SINK;
+ return ret;
+}
+
+static inline void tcpm_typec_connect(struct tcpm_port *port)
+{
+ if (!port->connected)
+ port->connected = true;
+}
+
+static int tcpm_src_attach(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ enum typec_cc_polarity polarity =
+ port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
+ : TYPEC_POLARITY_CC1;
+ int ret;
+
+ if (port->attached)
+ return 0;
+
+ ret = tcpm_set_polarity(dev, polarity);
+ if (ret < 0)
+ return ret;
+
+ ret = tcpm_set_roles(dev, true, TYPEC_SOURCE, TYPEC_HOST);
+ if (ret < 0)
+ return ret;
+
+ ret = drvops->set_pd_rx(dev, true);
+ if (ret < 0)
+ goto out_disable_mux;
+
+ /*
+ * USB Type-C specification, version 1.2,
+ * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
+ * Enable VCONN only if the non-RD port is set to RA.
+ */
+ if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
+ (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
+ ret = tcpm_set_vconn(dev, true);
+ if (ret < 0)
+ goto out_disable_pd;
+ }
+
+ ret = tcpm_set_vbus(dev, true);
+ if (ret < 0)
+ goto out_disable_vconn;
+
+ port->pd_capable = false;
+
+ port->partner = NULL;
+
+ port->attached = true;
+
+ return 0;
+
+out_disable_vconn:
+ tcpm_set_vconn(dev, false);
+out_disable_pd:
+ drvops->set_pd_rx(dev, false);
+out_disable_mux:
+ dev_err(dev, "TCPM: CC connected in %s as DFP\n",
+ polarity ? "CC2" : "CC1");
+ return 0;
+}
+
+static inline void tcpm_typec_disconnect(struct tcpm_port *port)
+{
+ if (port->connected) {
+ port->partner = NULL;
+ port->connected = false;
+ }
+}
+
+static void tcpm_reset_port(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ tcpm_timer_uninit(dev);
+ tcpm_typec_disconnect(port);
+ tcpm_reset_event_cnt(dev);
+ port->wait_dr_swap_message = false;
+ port->attached = false;
+ port->pd_capable = false;
+
+ /*
+ * First Rx ID should be 0; set this to a sentinel of -1 so that
+ * we can check tcpm_pd_rx_handler() if we had seen it before.
+ */
+ port->rx_msgid = -1;
+
+ drvops->set_pd_rx(dev, false);
+ tcpm_init_vbus(dev); /* also disables charging */
+ tcpm_init_vconn(dev);
+ tcpm_set_current_limit(dev, 0, 0);
+ tcpm_set_polarity(dev, TYPEC_POLARITY_CC1);
+ tcpm_set_attached_state(dev, false);
+ port->nr_sink_caps = 0;
+}
+
+static void tcpm_detach(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ if (tcpm_port_is_disconnected(port))
+ port->hard_reset_count = 0;
+
+ if (!port->attached)
+ return;
+
+ tcpm_reset_port(dev);
+}
+
+static void tcpm_src_detach(struct udevice *dev)
+{
+ tcpm_detach(dev);
+}
+
+static int tcpm_snk_attach(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ if (port->attached)
+ return 0;
+
+ ret = tcpm_set_polarity(dev, port->cc2 != TYPEC_CC_OPEN ?
+ TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
+ if (ret < 0)
+ return ret;
+
+ ret = tcpm_set_roles(dev, true, TYPEC_SINK, TYPEC_DEVICE);
+ if (ret < 0)
+ return ret;
+
+ port->pd_capable = false;
+
+ port->partner = NULL;
+
+ port->attached = true;
+ dev_info(dev, "TCPM: CC connected in %s as UFP\n",
+ port->cc1 != TYPEC_CC_OPEN ? "CC1" : "CC2");
+
+ return 0;
+}
+
+static void tcpm_snk_detach(struct udevice *dev)
+{
+ tcpm_detach(dev);
+}
+
+static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
+{
+ if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
+ return HARD_RESET_SEND;
+ if (port->pd_capable)
+ return ERROR_RECOVERY;
+ if (port->pwr_role == TYPEC_SOURCE)
+ return SRC_UNATTACHED;
+ if (port->state == SNK_WAIT_CAPABILITIES)
+ return SNK_READY;
+ return SNK_UNATTACHED;
+}
+
+static inline enum tcpm_state unattached_state(struct tcpm_port *port)
+{
+ if (port->port_type == TYPEC_PORT_DRP) {
+ if (port->pwr_role == TYPEC_SOURCE)
+ return SRC_UNATTACHED;
+ else
+ return SNK_UNATTACHED;
+ } else if (port->port_type == TYPEC_PORT_SRC) {
+ return SRC_UNATTACHED;
+ }
+
+ return SNK_UNATTACHED;
+}
+
+static void run_state_machine(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int ret;
+
+ port->enter_state = port->state;
+ switch (port->state) {
+ case TOGGLING:
+ break;
+ /* SRC states */
+ case SRC_UNATTACHED:
+ tcpm_src_detach(dev);
+ if (tcpm_start_toggling(dev, tcpm_rp_cc(port))) {
+ tcpm_set_state(dev, TOGGLING, 0);
+ break;
+ }
+ tcpm_set_cc(dev, tcpm_rp_cc(port));
+ if (port->port_type == TYPEC_PORT_DRP)
+ tcpm_set_state(dev, SNK_UNATTACHED, PD_T_DRP_SNK);
+ break;
+ case SRC_ATTACH_WAIT:
+ if (tcpm_port_is_source(port))
+ tcpm_set_state(dev, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
+ break;
+
+ case SRC_ATTACHED:
+ ret = tcpm_src_attach(dev);
+ /*
+ * Currently, vbus control is not implemented,
+ * and the SRC detection process cannot be fully implemented.
+ */
+ tcpm_set_state(dev, SRC_READY, 0);
+ break;
+ case SRC_STARTUP:
+ port->caps_count = 0;
+ port->negotiated_rev = PD_MAX_REV;
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ port->explicit_contract = false;
+ tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0);
+ break;
+ case SRC_SEND_CAPABILITIES:
+ port->caps_count++;
+ if (port->caps_count > PD_N_CAPS_COUNT) {
+ tcpm_set_state(dev, SRC_READY, 0);
+ break;
+ }
+ ret = tcpm_pd_send_source_caps(dev);
+ if (ret < 0) {
+ tcpm_set_state(dev, SRC_SEND_CAPABILITIES,
+ PD_T_SEND_SOURCE_CAP);
+ } else {
+ /*
+ * Per standard, we should clear the reset counter here.
+ * However, that can result in state machine hang-ups.
+ * Reset it only in READY state to improve stability.
+ */
+ /* port->hard_reset_count = 0; */
+ port->caps_count = 0;
+ port->pd_capable = true;
+ tcpm_set_state_cond(dev, SRC_SEND_CAPABILITIES_TIMEOUT,
+ PD_T_SEND_SOURCE_CAP);
+ }
+ break;
+ case SRC_SEND_CAPABILITIES_TIMEOUT:
+ /*
+ * Error recovery for a PD_DATA_SOURCE_CAP reply timeout.
+ *
+ * PD 2.0 sinks are supposed to accept src-capabilities with a
+ * 3.0 header and simply ignore any src PDOs which the sink does
+ * not understand such as PPS but some 2.0 sinks instead ignore
+ * the entire PD_DATA_SOURCE_CAP message, causing contract
+ * negotiation to fail.
+ *
+ * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try
+ * sending src-capabilities with a lower PD revision to
+ * make these broken sinks work.
+ */
+ if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) {
+ tcpm_set_state(dev, HARD_RESET_SEND, 0);
+ } else if (port->negotiated_rev > PD_REV20) {
+ port->negotiated_rev--;
+ port->hard_reset_count = 0;
+ tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0);
+ } else {
+ tcpm_set_state(dev, hard_reset_state(port), 0);
+ }
+ break;
+ case SRC_NEGOTIATE_CAPABILITIES:
+ ret = tcpm_pd_check_request(dev);
+ if (ret < 0) {
+ tcpm_pd_send_control(dev, PD_CTRL_REJECT);
+ if (!port->explicit_contract) {
+ tcpm_set_state(dev,
+ SRC_WAIT_NEW_CAPABILITIES, 0);
+ } else {
+ tcpm_set_state(dev, SRC_READY, 0);
+ }
+ } else {
+ tcpm_pd_send_control(dev, PD_CTRL_ACCEPT);
+ tcpm_set_state(dev, SRC_TRANSITION_SUPPLY,
+ PD_T_SRC_TRANSITION);
+ }
+ break;
+ case SRC_TRANSITION_SUPPLY:
+ /* XXX: regulator_set_voltage(vbus, ...) */
+ tcpm_pd_send_control(dev, PD_CTRL_PS_RDY);
+ port->explicit_contract = true;
+ tcpm_set_state_cond(dev, SRC_READY, 0);
+ break;
+ case SRC_READY:
+ port->hard_reset_count = 0;
+
+ tcpm_typec_connect(port);
+ break;
+ case SRC_WAIT_NEW_CAPABILITIES:
+ /* Nothing to do... */
+ break;
+
+ /* SNK states */
+ case SNK_UNATTACHED:
+ tcpm_snk_detach(dev);
+ if (tcpm_start_toggling(dev, TYPEC_CC_RD)) {
+ tcpm_set_state(dev, TOGGLING, 0);
+ break;
+ }
+ tcpm_set_cc(dev, TYPEC_CC_RD);
+ if (port->port_type == TYPEC_PORT_DRP)
+ tcpm_set_state(dev, SRC_UNATTACHED, PD_T_DRP_SRC);
+ break;
+ case SNK_ATTACH_WAIT:
+ if ((port->cc1 == TYPEC_CC_OPEN &&
+ port->cc2 != TYPEC_CC_OPEN) ||
+ (port->cc1 != TYPEC_CC_OPEN &&
+ port->cc2 == TYPEC_CC_OPEN))
+ tcpm_set_state(dev, SNK_DEBOUNCED,
+ PD_T_CC_DEBOUNCE);
+ else if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(dev, SNK_UNATTACHED,
+ PD_T_CC_DEBOUNCE);
+ break;
+ case SNK_DEBOUNCED:
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(dev, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
+ else if (port->vbus_present)
+ tcpm_set_state(dev, SNK_ATTACHED, 0);
+ else
+ /* Wait for VBUS, but not forever */
+ tcpm_set_state(dev, PORT_RESET, PD_T_PS_SOURCE_ON);
+ break;
+ case SNK_ATTACHED:
+ ret = tcpm_snk_attach(dev);
+ if (ret < 0)
+ tcpm_set_state(dev, SNK_UNATTACHED, 0);
+ else
+ tcpm_set_state(dev, SNK_STARTUP, 0);
+ break;
+ case SNK_STARTUP:
+ port->negotiated_rev = PD_MAX_REV;
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ port->explicit_contract = false;
+ tcpm_set_state(dev, SNK_DISCOVERY, 0);
+ break;
+ case SNK_DISCOVERY:
+ if (port->vbus_present) {
+ tcpm_set_current_limit(dev,
+ tcpm_get_current_limit(port),
+ 5000);
+ tcpm_set_charge(dev, true);
+ tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0);
+ break;
+ }
+ /*
+ * For DRP, timeouts differ. Also, handling is supposed to be
+ * different and much more complex (dead battery detection;
+ * see USB power delivery specification, section 8.3.3.6.1.5.1).
+ */
+ tcpm_set_state(dev, hard_reset_state(port),
+ port->port_type == TYPEC_PORT_DRP ?
+ PD_T_DB_DETECT : PD_T_NO_RESPONSE);
+ break;
+ case SNK_DISCOVERY_DEBOUNCE:
+ tcpm_set_state(dev, SNK_DISCOVERY_DEBOUNCE_DONE,
+ PD_T_CC_DEBOUNCE);
+ break;
+ case SNK_DISCOVERY_DEBOUNCE_DONE:
+ tcpm_set_state(dev, unattached_state(port), 0);
+ break;
+ case SNK_WAIT_CAPABILITIES:
+ ret = drvops->set_pd_rx(dev, true);
+ if (ret < 0) {
+ tcpm_set_state(dev, SNK_READY, 0);
+ break;
+ }
+ /*
+ * If VBUS has never been low, and we time out waiting
+ * for source cap, try a soft reset first, in case we
+ * were already in a stable contract before this boot.
+ * Do this only once.
+ */
+ if (port->vbus_never_low) {
+ port->vbus_never_low = false;
+ tcpm_set_state(dev, SOFT_RESET_SEND,
+ PD_T_SINK_WAIT_CAP);
+ } else {
+ tcpm_set_state(dev, hard_reset_state(port),
+ PD_T_SINK_WAIT_CAP);
+ }
+ break;
+ case SNK_NEGOTIATE_CAPABILITIES:
+ port->pd_capable = true;
+ port->hard_reset_count = 0;
+ ret = tcpm_pd_send_request(dev);
+ if (ret < 0) {
+ /* Let the Source send capabilities again. */
+ tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0);
+ } else {
+ tcpm_set_state_cond(dev, hard_reset_state(port),
+ PD_T_SENDER_RESPONSE);
+ }
+ break;
+ case SNK_TRANSITION_SINK:
+ case SNK_TRANSITION_SINK_VBUS:
+ tcpm_set_state(dev, hard_reset_state(port),
+ PD_T_PS_TRANSITION);
+ break;
+ case SNK_READY:
+ port->update_sink_caps = false;
+ tcpm_typec_connect(port);
+ /*
+ * Here poll_event_cnt is cleared, waiting for self-powered Type-C devices
+ * to send DR_swap Messge until 1s (TCPM_POLL_EVENT_TIME_OUT * 500us)timeout
+ */
+ if (port->wait_dr_swap_message)
+ tcpm_reset_event_cnt(dev);
+
+ break;
+
+ /* Hard_Reset states */
+ case HARD_RESET_SEND:
+ tcpm_pd_transmit(dev, TCPC_TX_HARD_RESET, NULL);
+ tcpm_set_state(dev, HARD_RESET_START, 0);
+ port->wait_dr_swap_message = false;
+ break;
+ case HARD_RESET_START:
+ port->hard_reset_count++;
+ drvops->set_pd_rx(dev, false);
+ port->nr_sink_caps = 0;
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(dev, SRC_HARD_RESET_VBUS_OFF,
+ PD_T_PS_HARD_RESET);
+ else
+ tcpm_set_state(dev, SNK_HARD_RESET_SINK_OFF, 0);
+ break;
+ case SRC_HARD_RESET_VBUS_OFF:
+ tcpm_set_vconn(dev, true);
+ tcpm_set_vbus(dev, false);
+ tcpm_set_roles(dev, port->self_powered, TYPEC_SOURCE,
+ TYPEC_HOST);
+ tcpm_set_state(dev, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
+ break;
+ case SRC_HARD_RESET_VBUS_ON:
+ tcpm_set_vconn(dev, true);
+ tcpm_set_vbus(dev, true);
+ drvops->set_pd_rx(dev, true);
+ tcpm_set_attached_state(dev, true);
+ tcpm_set_state(dev, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
+ break;
+ case SNK_HARD_RESET_SINK_OFF:
+ tcpm_set_vconn(dev, false);
+ if (port->pd_capable)
+ tcpm_set_charge(dev, false);
+ tcpm_set_roles(dev, port->self_powered, TYPEC_SINK,
+ TYPEC_DEVICE);
+ /*
+ * VBUS may or may not toggle, depending on the adapter.
+ * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
+ * directly after timeout.
+ */
+ tcpm_set_state(dev, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
+ break;
+ case SNK_HARD_RESET_WAIT_VBUS:
+ /* Assume we're disconnected if VBUS doesn't come back. */
+ tcpm_set_state(dev, SNK_UNATTACHED,
+ PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
+ break;
+ case SNK_HARD_RESET_SINK_ON:
+ /* Note: There is no guarantee that VBUS is on in this state */
+ /*
+ * XXX:
+ * The specification suggests that dual mode ports in sink
+ * mode should transition to state PE_SRC_Transition_to_default.
+ * See USB power delivery specification chapter 8.3.3.6.1.3.
+ * This would mean to
+ * - turn off VCONN, reset power supply
+ * - request hardware reset
+ * - turn on VCONN
+ * - Transition to state PE_Src_Startup
+ * SNK only ports shall transition to state Snk_Startup
+ * (see chapter 8.3.3.3.8).
+ * Similar, dual-mode ports in source mode should transition
+ * to PE_SNK_Transition_to_default.
+ */
+ if (port->pd_capable) {
+ tcpm_set_current_limit(dev,
+ tcpm_get_current_limit(port),
+ 5000);
+ tcpm_set_charge(dev, true);
+ }
+ tcpm_set_attached_state(dev, true);
+ tcpm_set_state(dev, SNK_STARTUP, 0);
+ break;
+
+ /* Soft_Reset states */
+ case SOFT_RESET:
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ tcpm_pd_send_control(dev, PD_CTRL_ACCEPT);
+ if (port->pwr_role == TYPEC_SOURCE)
+ tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0);
+ else
+ tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0);
+ break;
+ case SOFT_RESET_SEND:
+ port->message_id = 0;
+ port->rx_msgid = -1;
+ if (tcpm_pd_send_control(dev, PD_CTRL_SOFT_RESET))
+ tcpm_set_state_cond(dev, hard_reset_state(port), 0);
+ else
+ tcpm_set_state_cond(dev, hard_reset_state(port),
+ PD_T_SENDER_RESPONSE);
+ break;
+
+ /* DR_Swap states */
+ case DR_SWAP_ACCEPT:
+ tcpm_pd_send_control(dev, PD_CTRL_ACCEPT);
+ tcpm_set_state_cond(dev, DR_SWAP_CHANGE_DR, 0);
+ break;
+ case DR_SWAP_CHANGE_DR:
+ if (port->data_role == TYPEC_HOST) {
+ tcpm_set_roles(dev, true, port->pwr_role,
+ TYPEC_DEVICE);
+ } else {
+ tcpm_set_roles(dev, true, port->pwr_role,
+ TYPEC_HOST);
+ }
+ /* DR_swap process complete, wait_dr_swap_message is cleared */
+ port->wait_dr_swap_message = false;
+ tcpm_set_state(dev, ready_state(port), 0);
+ break;
+ case ERROR_RECOVERY:
+ tcpm_set_state(dev, PORT_RESET, 0);
+ break;
+ case PORT_RESET:
+ tcpm_reset_port(dev);
+ if (port->self_powered)
+ tcpm_set_cc(dev, TYPEC_CC_OPEN);
+ else
+ tcpm_set_cc(dev, tcpm_default_state(port) == SNK_UNATTACHED ?
+ TYPEC_CC_RD : tcpm_rp_cc(port));
+ tcpm_set_state(dev, PORT_RESET_WAIT_OFF,
+ PD_T_ERROR_RECOVERY);
+ break;
+ case PORT_RESET_WAIT_OFF:
+ tcpm_set_state(dev,
+ tcpm_default_state(port),
+ port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
+ break;
+ default:
+ dev_err(dev, "TCPM: Unexpected port state %d\n", port->state);
+ break;
+ }
+}
+
+static void tcpm_state_machine(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ enum tcpm_state prev_state;
+
+ mutex_lock(&port->lock);
+ port->state_machine_running = true;
+
+ if (port->queued_message && tcpm_send_queued_message(dev))
+ goto done;
+
+ /* If we were queued due to a delayed state change, update it now */
+ if (port->delayed_state) {
+ dev_dbg(dev, "TCPM: state change %s -> %s [delayed %ld ms]\n",
+ tcpm_states[port->state],
+ tcpm_states[port->delayed_state], port->delay_ms);
+ port->prev_state = port->state;
+ port->state = port->delayed_state;
+ port->delayed_state = INVALID_STATE;
+ }
+
+ /*
+ * Continue running as long as we have (non-delayed) state changes
+ * to make.
+ */
+ do {
+ prev_state = port->state;
+ run_state_machine(dev);
+ if (port->queued_message)
+ tcpm_send_queued_message(dev);
+ } while (port->state != prev_state && !port->delayed_state);
+
+done:
+ port->state_machine_running = false;
+ mutex_unlock(&port->lock);
+}
+
+static void _tcpm_cc_change(struct udevice *dev, enum typec_cc_status cc1,
+ enum typec_cc_status cc2)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ enum typec_cc_status old_cc1, old_cc2;
+ enum tcpm_state new_state;
+
+ old_cc1 = port->cc1;
+ old_cc2 = port->cc2;
+ port->cc1 = cc1;
+ port->cc2 = cc2;
+
+ dev_dbg(dev, "TCPM: CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]\n",
+ old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
+ port->polarity,
+ tcpm_port_is_disconnected(port) ? "disconnected" : "connected");
+
+ switch (port->state) {
+ case TOGGLING:
+ if (tcpm_port_is_source(port))
+ tcpm_set_state(dev, SRC_ATTACH_WAIT, 0);
+ else if (tcpm_port_is_sink(port))
+ tcpm_set_state(dev, SNK_ATTACH_WAIT, 0);
+ break;
+ case SRC_UNATTACHED:
+ case SRC_ATTACH_WAIT:
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(dev, SRC_UNATTACHED, 0);
+ else if (cc1 != old_cc1 || cc2 != old_cc2)
+ tcpm_set_state(dev, SRC_ATTACH_WAIT, 0);
+ break;
+ case SRC_ATTACHED:
+ case SRC_SEND_CAPABILITIES:
+ case SRC_READY:
+ if (tcpm_port_is_disconnected(port) ||
+ !tcpm_port_is_source(port))
+ tcpm_set_state(dev, SRC_UNATTACHED, 0);
+ break;
+ case SNK_UNATTACHED:
+ if (tcpm_port_is_sink(port))
+ tcpm_set_state(dev, SNK_ATTACH_WAIT, 0);
+ break;
+ case SNK_ATTACH_WAIT:
+ if ((port->cc1 == TYPEC_CC_OPEN &&
+ port->cc2 != TYPEC_CC_OPEN) ||
+ (port->cc1 != TYPEC_CC_OPEN &&
+ port->cc2 == TYPEC_CC_OPEN))
+ new_state = SNK_DEBOUNCED;
+ else if (tcpm_port_is_disconnected(port))
+ new_state = SNK_UNATTACHED;
+ else
+ break;
+ if (new_state != port->delayed_state)
+ tcpm_set_state(dev, SNK_ATTACH_WAIT, 0);
+ break;
+ case SNK_DEBOUNCED:
+ if (tcpm_port_is_disconnected(port))
+ new_state = SNK_UNATTACHED;
+ else if (port->vbus_present)
+ new_state = tcpm_try_src(port) ? INVALID_STATE : SNK_ATTACHED;
+ else
+ new_state = SNK_UNATTACHED;
+ if (new_state != port->delayed_state)
+ tcpm_set_state(dev, SNK_DEBOUNCED, 0);
+ break;
+ case SNK_READY:
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(dev, unattached_state(port), 0);
+ else if (!port->pd_capable &&
+ (cc1 != old_cc1 || cc2 != old_cc2))
+ tcpm_set_current_limit(dev,
+ tcpm_get_current_limit(port),
+ 5000);
+ break;
+
+ case SNK_DISCOVERY:
+ /* CC line is unstable, wait for debounce */
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(dev, SNK_DISCOVERY_DEBOUNCE, 0);
+ break;
+ case SNK_DISCOVERY_DEBOUNCE:
+ break;
+
+ case PORT_RESET:
+ case PORT_RESET_WAIT_OFF:
+ /*
+ * State set back to default mode once the timer completes.
+ * Ignore CC changes here.
+ */
+ break;
+ default:
+ /*
+ * While acting as sink and auto vbus discharge is enabled, Allow disconnect
+ * to be driven by vbus disconnect.
+ */
+ if (tcpm_port_is_disconnected(port))
+ tcpm_set_state(dev, unattached_state(port), 0);
+ break;
+ }
+}
+
+static void _tcpm_pd_vbus_on(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ dev_dbg(dev, "TCPM: VBUS on event\n");
+ port->vbus_present = true;
+ /*
+ * When vbus_present is true i.e. Voltage at VBUS is greater than VSAFE5V implicitly
+ * states that vbus is not at VSAFE0V, hence clear the vbus_vsafe0v flag here.
+ */
+ port->vbus_vsafe0v = false;
+
+ switch (port->state) {
+ case SNK_TRANSITION_SINK_VBUS:
+ port->explicit_contract = true;
+ tcpm_set_state(dev, SNK_READY, 0);
+ break;
+ case SNK_DISCOVERY:
+ tcpm_set_state(dev, SNK_DISCOVERY, 0);
+ break;
+ case SNK_DEBOUNCED:
+ tcpm_set_state(dev, SNK_ATTACHED, 0);
+ break;
+ case SNK_HARD_RESET_WAIT_VBUS:
+ tcpm_set_state(dev, SNK_HARD_RESET_SINK_ON, 0);
+ break;
+ case SRC_ATTACHED:
+ tcpm_set_state(dev, SRC_STARTUP, 0);
+ break;
+ case SRC_HARD_RESET_VBUS_ON:
+ tcpm_set_state(dev, SRC_STARTUP, 0);
+ break;
+
+ case PORT_RESET:
+ case PORT_RESET_WAIT_OFF:
+ /*
+ * State set back to default mode once the timer completes.
+ * Ignore vbus changes here.
+ */
+ break;
+
+ default:
+ break;
+ }
+}
+
+static void _tcpm_pd_vbus_off(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ dev_dbg(dev, "TCPM: VBUS off event\n");
+ port->vbus_present = false;
+ port->vbus_never_low = false;
+ switch (port->state) {
+ case SNK_HARD_RESET_SINK_OFF:
+ tcpm_set_state(dev, SNK_HARD_RESET_WAIT_VBUS, 0);
+ break;
+ case HARD_RESET_SEND:
+ break;
+ case SNK_ATTACH_WAIT:
+ tcpm_set_state(dev, SNK_UNATTACHED, 0);
+ break;
+
+ case SNK_NEGOTIATE_CAPABILITIES:
+ break;
+
+ case PORT_RESET_WAIT_OFF:
+ tcpm_set_state(dev, tcpm_default_state(port), 0);
+ break;
+
+ case PORT_RESET:
+ /*
+ * State set back to default mode once the timer completes.
+ * Ignore vbus changes here.
+ */
+ break;
+
+ default:
+ if (port->pwr_role == TYPEC_SINK && port->attached)
+ tcpm_set_state(dev, SNK_UNATTACHED, 0);
+ break;
+ }
+}
+
+void tcpm_cc_change(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ enum typec_cc_status cc1, cc2;
+
+ tcpm_reset_event_cnt(dev);
+ if (drvops->get_cc(dev, &cc1, &cc2) == 0)
+ _tcpm_cc_change(dev, cc1, cc2);
+}
+
+void tcpm_vbus_change(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ bool vbus;
+
+ tcpm_reset_event_cnt(dev);
+ vbus = drvops->get_vbus(dev);
+ if (vbus)
+ _tcpm_pd_vbus_on(dev);
+ else
+ _tcpm_pd_vbus_off(dev);
+}
+
+void tcpm_pd_hard_reset(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ tcpm_reset_event_cnt(dev);
+ dev_dbg(dev, "TCPM: Received hard reset\n");
+
+ /* If a hard reset message is received during the port reset process,
+ * we should ignore it, that is, do not set port->state to HARD_RESET_START.
+ */
+ if (port->state == PORT_RESET || port->state == PORT_RESET_WAIT_OFF)
+ return;
+
+ /*
+ * If we keep receiving hard reset requests, executing the hard reset
+ * must have failed. Revert to error recovery if that happens.
+ */
+ tcpm_set_state(dev,
+ port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
+ HARD_RESET_START : ERROR_RECOVERY,
+ 0);
+}
+
+static void tcpm_init(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ enum typec_cc_status cc1, cc2;
+
+ drvops->init(dev);
+
+ tcpm_reset_port(dev);
+
+ /*
+ * XXX
+ * Should possibly wait for VBUS to settle if it was enabled locally
+ * since tcpm_reset_port() will disable VBUS.
+ */
+ port->vbus_present = drvops->get_vbus(dev);
+ if (port->vbus_present)
+ port->vbus_never_low = true;
+
+ /*
+ * 1. When vbus_present is true, voltage on VBUS is already at VSAFE5V.
+ * So implicitly vbus_vsafe0v = false.
+ *
+ * 2. When vbus_present is false and TCPC does NOT support querying
+ * vsafe0v status, then, it's best to assume vbus is at VSAFE0V i.e.
+ * vbus_vsafe0v is true.
+ *
+ * 3. When vbus_present is false and TCPC does support querying vsafe0v,
+ * then, query tcpc for vsafe0v status.
+ */
+ if (port->vbus_present)
+ port->vbus_vsafe0v = false;
+ else
+ port->vbus_vsafe0v = true;
+
+ tcpm_set_state(dev, tcpm_default_state(port), 0);
+
+ if (drvops->get_cc(dev, &cc1, &cc2) == 0)
+ _tcpm_cc_change(dev, cc1, cc2);
+}
+
+static int tcpm_fw_get_caps(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ ofnode node;
+ const char *cap_str;
+ int ret;
+ u32 mw;
+
+ ret = drvops->get_connector_node(dev, &node);
+ if (ret)
+ return ret;
+
+ cap_str = ofnode_read_string(node, "power-role");
+ if (!cap_str)
+ return -EINVAL;
+
+ if (!strcmp("dual", cap_str))
+ port->typec_type = TYPEC_PORT_DRP;
+ else if (!strcmp("source", cap_str))
+ port->typec_type = TYPEC_PORT_SRC;
+ else if (!strcmp("sink", cap_str))
+ port->typec_type = TYPEC_PORT_SNK;
+ else
+ return -EINVAL;
+
+ port->port_type = port->typec_type;
+
+ if (port->port_type == TYPEC_PORT_SNK)
+ goto sink;
+
+ /* Get source pdos */
+ ret = ofnode_read_size(node, "source-pdos") / sizeof(u32);
+ if (ret <= 0)
+ return -EINVAL;
+
+ port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
+ ret = ofnode_read_u32_array(node, "source-pdos",
+ port->src_pdo, port->nr_src_pdo);
+ if (ret || tcpm_validate_caps(dev, port->src_pdo, port->nr_src_pdo))
+ return -EINVAL;
+
+ if (port->port_type == TYPEC_PORT_SRC)
+ return 0;
+
+ /* Get the preferred power role for DRP */
+ cap_str = ofnode_read_string(node, "try-power-role");
+ if (!cap_str)
+ return -EINVAL;
+
+ if (!strcmp("sink", cap_str))
+ port->typec_prefer_role = TYPEC_SINK;
+ else if (!strcmp("source", cap_str))
+ port->typec_prefer_role = TYPEC_SOURCE;
+ else
+ return -EINVAL;
+
+ if (port->typec_prefer_role < 0)
+ return -EINVAL;
+sink:
+ /* Get sink pdos */
+ ret = ofnode_read_size(node, "sink-pdos") / sizeof(u32);
+ if (ret <= 0)
+ return -EINVAL;
+
+ port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
+ ret = ofnode_read_u32_array(node, "sink-pdos",
+ port->snk_pdo, port->nr_snk_pdo);
+ if (ret || tcpm_validate_caps(dev, port->snk_pdo, port->nr_snk_pdo))
+ return -EINVAL;
+
+ if (ofnode_read_u32_array(node, "op-sink-microwatt", &mw, 1))
+ return -EINVAL;
+ port->operating_snk_mw = mw / 1000;
+
+ port->self_powered = ofnode_read_bool(node, "self-powered");
+
+ return 0;
+}
+
+static int tcpm_port_init(struct udevice *dev)
+{
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+ int err;
+
+ err = tcpm_fw_get_caps(dev);
+ if (err < 0) {
+ dev_err(dev, "TCPM: please check the dts config: %d\n", err);
+ return err;
+ }
+
+ port->try_role = port->typec_prefer_role;
+ port->port_type = port->typec_type;
+
+ tcpm_init(dev);
+
+ dev_info(dev, "TCPM: init finished\n");
+
+ return 0;
+}
+
+static void tcpm_poll_event(struct udevice *dev)
+{
+ const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev);
+ struct tcpm_port *port = dev_get_uclass_plat(dev);
+
+ if (!drvops->get_vbus(dev))
+ return;
+
+ while (port->poll_event_cnt < TCPM_POLL_EVENT_TIME_OUT) {
+ if (!port->wait_dr_swap_message &&
+ (port->state == SNK_READY || port->state == SRC_READY))
+ break;
+
+ drvops->poll_event(dev);
+ port->poll_event_cnt++;
+ udelay(500);
+ tcpm_check_and_run_delayed_work(dev);
+ }
+
+ if (port->state != SNK_READY && port->state != SRC_READY)
+ dev_warn(dev, "TCPM: exit in state %s\n",
+ tcpm_states[port->state]);
+
+ /*
+ * At this time, call the callback function of the respective pd chip
+ * to enter the low-power mode. In order to reduce the time spent on
+ * the PD chip driver as much as possible, the tcpm framework does not
+ * fully process the communication initiated by the device,so it should
+ * be noted that we can disable the internal oscillator, etc., but do
+ * not turn off the power of the transceiver module, otherwise the
+ * self-powered Type-C device will initiate a Message(eg: self-powered
+ * Type-C hub initiates a SINK capability request(PD_CTRL_GET_SINK_CAP))
+ * and the pd chip cannot reply to GoodCRC, causing the self-powered Type-C
+ * device to switch vbus to vSafe5v, or even turn off vbus.
+ */
+ if (!drvops->enter_low_power_mode)
+ return;
+
+ if (drvops->enter_low_power_mode(dev, port->attached, port->pd_capable))
+ dev_err(dev, "TCPM: failed to enter low power\n");
+ else
+ dev_info(dev, "TCPM: PD chip enter low power mode\n");
+}
+
+int tcpm_post_probe(struct udevice *dev)
+{
+ int ret = tcpm_port_init(dev);
+
+ if (ret < 0) {
+ dev_err(dev, "failed to tcpm port init\n");
+ return ret;
+ }
+
+ tcpm_poll_event(dev);
+
+ return 0;
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 2015-2017 Google, Inc
+ */
+
+#ifndef __LINUX_USB_PD_H
+#define __LINUX_USB_PD_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+enum typec_port_type {
+ TYPEC_PORT_SRC,
+ TYPEC_PORT_SNK,
+ TYPEC_PORT_DRP,
+};
+
+enum typec_data_role {
+ TYPEC_DEVICE,
+ TYPEC_HOST,
+};
+
+enum typec_role {
+ TYPEC_SINK,
+ TYPEC_SOURCE,
+};
+
+/* USB PD Messages */
+enum pd_ctrl_msg_type {
+ /* 0 Reserved */
+ PD_CTRL_GOOD_CRC = 1,
+ PD_CTRL_GOTO_MIN = 2,
+ PD_CTRL_ACCEPT = 3,
+ PD_CTRL_REJECT = 4,
+ PD_CTRL_PING = 5,
+ PD_CTRL_PS_RDY = 6,
+ PD_CTRL_GET_SOURCE_CAP = 7,
+ PD_CTRL_GET_SINK_CAP = 8,
+ PD_CTRL_DR_SWAP = 9,
+ PD_CTRL_PR_SWAP = 10,
+ PD_CTRL_VCONN_SWAP = 11,
+ PD_CTRL_WAIT = 12,
+ PD_CTRL_SOFT_RESET = 13,
+ /* 14-15 Reserved */
+ PD_CTRL_NOT_SUPP = 16,
+ PD_CTRL_GET_SOURCE_CAP_EXT = 17,
+ PD_CTRL_GET_STATUS = 18,
+ PD_CTRL_FR_SWAP = 19,
+ PD_CTRL_GET_PPS_STATUS = 20,
+ PD_CTRL_GET_COUNTRY_CODES = 21,
+ /* 22-31 Reserved */
+};
+
+enum pd_data_msg_type {
+ /* 0 Reserved */
+ PD_DATA_SOURCE_CAP = 1,
+ PD_DATA_REQUEST = 2,
+ PD_DATA_BIST = 3,
+ PD_DATA_SINK_CAP = 4,
+ PD_DATA_BATT_STATUS = 5,
+ PD_DATA_ALERT = 6,
+ PD_DATA_GET_COUNTRY_INFO = 7,
+ PD_DATA_ENTER_USB = 8,
+ /* 9-14 Reserved */
+ PD_DATA_VENDOR_DEF = 15,
+ /* 16-31 Reserved */
+};
+
+enum pd_ext_msg_type {
+ /* 0 Reserved */
+ PD_EXT_SOURCE_CAP_EXT = 1,
+ PD_EXT_STATUS = 2,
+ PD_EXT_GET_BATT_CAP = 3,
+ PD_EXT_GET_BATT_STATUS = 4,
+ PD_EXT_BATT_CAP = 5,
+ PD_EXT_GET_MANUFACTURER_INFO = 6,
+ PD_EXT_MANUFACTURER_INFO = 7,
+ PD_EXT_SECURITY_REQUEST = 8,
+ PD_EXT_SECURITY_RESPONSE = 9,
+ PD_EXT_FW_UPDATE_REQUEST = 10,
+ PD_EXT_FW_UPDATE_RESPONSE = 11,
+ PD_EXT_PPS_STATUS = 12,
+ PD_EXT_COUNTRY_INFO = 13,
+ PD_EXT_COUNTRY_CODES = 14,
+ /* 15-31 Reserved */
+};
+
+#define PD_REV10 0x0
+#define PD_REV20 0x1
+#define PD_REV30 0x2
+#define PD_MAX_REV PD_REV30
+
+#define PD_HEADER_EXT_HDR BIT(15)
+#define PD_HEADER_CNT_SHIFT 12
+#define PD_HEADER_CNT_MASK 0x7
+#define PD_HEADER_ID_SHIFT 9
+#define PD_HEADER_ID_MASK 0x7
+#define PD_HEADER_PWR_ROLE BIT(8)
+#define PD_HEADER_REV_SHIFT 6
+#define PD_HEADER_REV_MASK 0x3
+#define PD_HEADER_DATA_ROLE BIT(5)
+#define PD_HEADER_TYPE_SHIFT 0
+#define PD_HEADER_TYPE_MASK 0x1f
+
+#define PD_HEADER(type, pwr, data, rev, id, cnt, ext_hdr) \
+ ((((type) & PD_HEADER_TYPE_MASK) << PD_HEADER_TYPE_SHIFT) | \
+ ((pwr) == TYPEC_SOURCE ? PD_HEADER_PWR_ROLE : 0) | \
+ ((data) == TYPEC_HOST ? PD_HEADER_DATA_ROLE : 0) | \
+ ((rev) << PD_HEADER_REV_SHIFT) | \
+ (((id) & PD_HEADER_ID_MASK) << PD_HEADER_ID_SHIFT) | \
+ (((cnt) & PD_HEADER_CNT_MASK) << PD_HEADER_CNT_SHIFT) | \
+ ((ext_hdr) ? PD_HEADER_EXT_HDR : 0))
+
+#define PD_HEADER_LE(type, pwr, data, rev, id, cnt) \
+ cpu_to_le16(PD_HEADER((type), (pwr), (data), (rev), (id), (cnt), (0)))
+
+static inline unsigned int pd_header_cnt(u16 header)
+{
+ return (header >> PD_HEADER_CNT_SHIFT) & PD_HEADER_CNT_MASK;
+}
+
+static inline unsigned int pd_header_cnt_le(__le16 header)
+{
+ return pd_header_cnt(le16_to_cpu(header));
+}
+
+static inline unsigned int pd_header_type(u16 header)
+{
+ return (header >> PD_HEADER_TYPE_SHIFT) & PD_HEADER_TYPE_MASK;
+}
+
+static inline unsigned int pd_header_type_le(__le16 header)
+{
+ return pd_header_type(le16_to_cpu(header));
+}
+
+static inline unsigned int pd_header_msgid(u16 header)
+{
+ return (header >> PD_HEADER_ID_SHIFT) & PD_HEADER_ID_MASK;
+}
+
+static inline unsigned int pd_header_msgid_le(__le16 header)
+{
+ return pd_header_msgid(le16_to_cpu(header));
+}
+
+static inline unsigned int pd_header_rev(u16 header)
+{
+ return (header >> PD_HEADER_REV_SHIFT) & PD_HEADER_REV_MASK;
+}
+
+static inline unsigned int pd_header_rev_le(__le16 header)
+{
+ return pd_header_rev(le16_to_cpu(header));
+}
+
+#define PD_EXT_HDR_CHUNKED BIT(15)
+#define PD_EXT_HDR_CHUNK_NUM_SHIFT 11
+#define PD_EXT_HDR_CHUNK_NUM_MASK 0xf
+#define PD_EXT_HDR_REQ_CHUNK BIT(10)
+#define PD_EXT_HDR_DATA_SIZE_SHIFT 0
+#define PD_EXT_HDR_DATA_SIZE_MASK 0x1ff
+
+#define PD_EXT_HDR(data_size, req_chunk, chunk_num, chunked) \
+ ((((data_size) & PD_EXT_HDR_DATA_SIZE_MASK) << PD_EXT_HDR_DATA_SIZE_SHIFT) | \
+ ((req_chunk) ? PD_EXT_HDR_REQ_CHUNK : 0) | \
+ (((chunk_num) & PD_EXT_HDR_CHUNK_NUM_MASK) << PD_EXT_HDR_CHUNK_NUM_SHIFT) | \
+ ((chunked) ? PD_EXT_HDR_CHUNKED : 0))
+
+#define PD_EXT_HDR_LE(data_size, req_chunk, chunk_num, chunked) \
+ cpu_to_le16(PD_EXT_HDR((data_size), (req_chunk), (chunk_num), (chunked)))
+
+static inline unsigned int pd_ext_header_chunk_num(u16 ext_header)
+{
+ return (ext_header >> PD_EXT_HDR_CHUNK_NUM_SHIFT) &
+ PD_EXT_HDR_CHUNK_NUM_MASK;
+}
+
+static inline unsigned int pd_ext_header_data_size(u16 ext_header)
+{
+ return (ext_header >> PD_EXT_HDR_DATA_SIZE_SHIFT) &
+ PD_EXT_HDR_DATA_SIZE_MASK;
+}
+
+static inline unsigned int pd_ext_header_data_size_le(__le16 ext_header)
+{
+ return pd_ext_header_data_size(le16_to_cpu(ext_header));
+}
+
+#define PD_MAX_PAYLOAD 7
+#define PD_EXT_MAX_CHUNK_DATA 26
+
+/*
+ * struct pd_chunked_ext_message_data - PD chunked extended message data as
+ * seen on wire
+ * @header: PD extended message header
+ * @data: PD extended message data
+ */
+struct pd_chunked_ext_message_data {
+ __le16 header;
+ u8 data[PD_EXT_MAX_CHUNK_DATA];
+} __packed;
+
+/*
+ * struct pd_message - PD message as seen on wire
+ * @header: PD message header
+ * @payload: PD message payload
+ * @ext_msg: PD message chunked extended message data
+ */
+struct pd_message {
+ __le16 header;
+ union {
+ __le32 payload[PD_MAX_PAYLOAD];
+ struct pd_chunked_ext_message_data ext_msg;
+ };
+} __packed;
+
+/* PDO: Power Data Object */
+#define PDO_MAX_OBJECTS 7
+
+enum pd_pdo_type {
+ PDO_TYPE_FIXED = 0,
+ PDO_TYPE_BATT = 1,
+ PDO_TYPE_VAR = 2,
+ PDO_TYPE_APDO = 3,
+};
+
+#define PDO_TYPE_SHIFT 30
+#define PDO_TYPE_MASK 0x3
+
+#define PDO_TYPE(t) ((t) << PDO_TYPE_SHIFT)
+
+#define PDO_VOLT_MASK 0x3ff
+#define PDO_CURR_MASK 0x3ff
+#define PDO_PWR_MASK 0x3ff
+
+#define PDO_FIXED_DUAL_ROLE BIT(29) /* Power role swap supported */
+#define PDO_FIXED_SUSPEND BIT(28) /* USB Suspend supported (Source) */
+#define PDO_FIXED_HIGHER_CAP BIT(28) /* Requires more than vSafe5V (Sink) */
+#define PDO_FIXED_EXTPOWER BIT(27) /* Externally powered */
+#define PDO_FIXED_USB_COMM BIT(26) /* USB communications capable */
+#define PDO_FIXED_DATA_SWAP BIT(25) /* Data role swap supported */
+#define PDO_FIXED_UNCHUNK_EXT BIT(24) /* Unchunked Extended Message supported (Source) */
+#define PDO_FIXED_FRS_CURR_MASK (BIT(24) | BIT(23)) /* FR_Swap Current (Sink) */
+#define PDO_FIXED_FRS_CURR_SHIFT 23
+#define PDO_FIXED_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_FIXED_CURR_SHIFT 0 /* 10mA units */
+
+#define PDO_FIXED_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_FIXED_VOLT_SHIFT)
+#define PDO_FIXED_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_FIXED_CURR_SHIFT)
+
+#define PDO_FIXED(mv, ma, flags) \
+ (PDO_TYPE(PDO_TYPE_FIXED) | (flags) | \
+ PDO_FIXED_VOLT(mv) | PDO_FIXED_CURR(ma))
+
+#define VSAFE5V 5000 /* mv units */
+
+#define PDO_BATT_MAX_VOLT_SHIFT 20 /* 50mV units */
+#define PDO_BATT_MIN_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */
+
+#define PDO_BATT_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MIN_VOLT_SHIFT)
+#define PDO_BATT_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MAX_VOLT_SHIFT)
+#define PDO_BATT_MAX_POWER(mw) ((((mw) / 250) & PDO_PWR_MASK) << PDO_BATT_MAX_PWR_SHIFT)
+
+#define PDO_BATT(min_mv, max_mv, max_mw) \
+ (PDO_TYPE(PDO_TYPE_BATT) | PDO_BATT_MIN_VOLT(min_mv) | \
+ PDO_BATT_MAX_VOLT(max_mv) | PDO_BATT_MAX_POWER(max_mw))
+
+#define PDO_VAR_MAX_VOLT_SHIFT 20 /* 50mV units */
+#define PDO_VAR_MIN_VOLT_SHIFT 10 /* 50mV units */
+#define PDO_VAR_MAX_CURR_SHIFT 0 /* 10mA units */
+
+#define PDO_VAR_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MIN_VOLT_SHIFT)
+#define PDO_VAR_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MAX_VOLT_SHIFT)
+#define PDO_VAR_MAX_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_VAR_MAX_CURR_SHIFT)
+
+#define PDO_VAR(min_mv, max_mv, max_ma) \
+ (PDO_TYPE(PDO_TYPE_VAR) | PDO_VAR_MIN_VOLT(min_mv) | \
+ PDO_VAR_MAX_VOLT(max_mv) | PDO_VAR_MAX_CURR(max_ma))
+
+enum pd_apdo_type {
+ APDO_TYPE_PPS = 0,
+};
+
+#define PDO_APDO_TYPE_SHIFT 28 /* Only valid value currently is 0x0 - PPS */
+#define PDO_APDO_TYPE_MASK 0x3
+
+#define PDO_APDO_TYPE(t) ((t) << PDO_APDO_TYPE_SHIFT)
+
+#define PDO_PPS_APDO_MAX_VOLT_SHIFT 17 /* 100mV units */
+#define PDO_PPS_APDO_MIN_VOLT_SHIFT 8 /* 100mV units */
+#define PDO_PPS_APDO_MAX_CURR_SHIFT 0 /* 50mA units */
+
+#define PDO_PPS_APDO_VOLT_MASK 0xff
+#define PDO_PPS_APDO_CURR_MASK 0x7f
+
+#define PDO_PPS_APDO_MIN_VOLT(mv) \
+ ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MIN_VOLT_SHIFT)
+#define PDO_PPS_APDO_MAX_VOLT(mv) \
+ ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MAX_VOLT_SHIFT)
+#define PDO_PPS_APDO_MAX_CURR(ma) \
+ ((((ma) / 50) & PDO_PPS_APDO_CURR_MASK) << PDO_PPS_APDO_MAX_CURR_SHIFT)
+
+#define PDO_PPS_APDO(min_mv, max_mv, max_ma) \
+ (PDO_TYPE(PDO_TYPE_APDO) | PDO_APDO_TYPE(APDO_TYPE_PPS) | \
+ PDO_PPS_APDO_MIN_VOLT(min_mv) | PDO_PPS_APDO_MAX_VOLT(max_mv) | \
+ PDO_PPS_APDO_MAX_CURR(max_ma))
+
+static inline enum pd_pdo_type pdo_type(u32 pdo)
+{
+ return (pdo >> PDO_TYPE_SHIFT) & PDO_TYPE_MASK;
+}
+
+static inline unsigned int pdo_fixed_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_FIXED_VOLT_SHIFT) & PDO_VOLT_MASK) * 50;
+}
+
+static inline unsigned int pdo_min_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_VAR_MIN_VOLT_SHIFT) & PDO_VOLT_MASK) * 50;
+}
+
+static inline unsigned int pdo_max_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_VAR_MAX_VOLT_SHIFT) & PDO_VOLT_MASK) * 50;
+}
+
+static inline unsigned int pdo_max_current(u32 pdo)
+{
+ return ((pdo >> PDO_VAR_MAX_CURR_SHIFT) & PDO_CURR_MASK) * 10;
+}
+
+static inline unsigned int pdo_max_power(u32 pdo)
+{
+ return ((pdo >> PDO_BATT_MAX_PWR_SHIFT) & PDO_PWR_MASK) * 250;
+}
+
+static inline enum pd_apdo_type pdo_apdo_type(u32 pdo)
+{
+ return (pdo >> PDO_APDO_TYPE_SHIFT) & PDO_APDO_TYPE_MASK;
+}
+
+static inline unsigned int pdo_pps_apdo_min_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_PPS_APDO_MIN_VOLT_SHIFT) &
+ PDO_PPS_APDO_VOLT_MASK) * 100;
+}
+
+static inline unsigned int pdo_pps_apdo_max_voltage(u32 pdo)
+{
+ return ((pdo >> PDO_PPS_APDO_MAX_VOLT_SHIFT) &
+ PDO_PPS_APDO_VOLT_MASK) * 100;
+}
+
+static inline unsigned int pdo_pps_apdo_max_current(u32 pdo)
+{
+ return ((pdo >> PDO_PPS_APDO_MAX_CURR_SHIFT) &
+ PDO_PPS_APDO_CURR_MASK) * 50;
+}
+
+/* RDO: Request Data Object */
+#define RDO_OBJ_POS_SHIFT 28
+#define RDO_OBJ_POS_MASK 0x7
+#define RDO_GIVE_BACK BIT(27) /* Supports reduced operating current */
+#define RDO_CAP_MISMATCH BIT(26) /* Not satisfied by source caps */
+#define RDO_USB_COMM BIT(25) /* USB communications capable */
+#define RDO_NO_SUSPEND BIT(24) /* USB Suspend not supported */
+
+#define RDO_PWR_MASK 0x3ff
+#define RDO_CURR_MASK 0x3ff
+
+#define RDO_FIXED_OP_CURR_SHIFT 10
+#define RDO_FIXED_MAX_CURR_SHIFT 0
+
+#define RDO_OBJ(idx) (((idx) & RDO_OBJ_POS_MASK) << RDO_OBJ_POS_SHIFT)
+
+#define PDO_FIXED_OP_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_OP_CURR_SHIFT)
+#define PDO_FIXED_MAX_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_MAX_CURR_SHIFT)
+
+#define RDO_FIXED(idx, op_ma, max_ma, flags) \
+ (RDO_OBJ(idx) | (flags) | \
+ PDO_FIXED_OP_CURR(op_ma) | PDO_FIXED_MAX_CURR(max_ma))
+
+#define RDO_BATT_OP_PWR_SHIFT 10 /* 250mW units */
+#define RDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */
+
+#define RDO_BATT_OP_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_OP_PWR_SHIFT)
+#define RDO_BATT_MAX_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_MAX_PWR_SHIFT)
+
+#define RDO_BATT(idx, op_mw, max_mw, flags) \
+ (RDO_OBJ(idx) | (flags) | \
+ RDO_BATT_OP_PWR(op_mw) | RDO_BATT_MAX_PWR(max_mw))
+
+#define RDO_PROG_VOLT_MASK 0x7ff
+#define RDO_PROG_CURR_MASK 0x7f
+
+#define RDO_PROG_VOLT_SHIFT 9
+#define RDO_PROG_CURR_SHIFT 0
+
+#define RDO_PROG_VOLT_MV_STEP 20
+#define RDO_PROG_CURR_MA_STEP 50
+
+#define PDO_PROG_OUT_VOLT(mv) \
+ ((((mv) / RDO_PROG_VOLT_MV_STEP) & RDO_PROG_VOLT_MASK) << RDO_PROG_VOLT_SHIFT)
+#define PDO_PROG_OP_CURR(ma) \
+ ((((ma) / RDO_PROG_CURR_MA_STEP) & RDO_PROG_CURR_MASK) << RDO_PROG_CURR_SHIFT)
+
+#define RDO_PROG(idx, out_mv, op_ma, flags) \
+ (RDO_OBJ(idx) | (flags) | \
+ PDO_PROG_OUT_VOLT(out_mv) | PDO_PROG_OP_CURR(op_ma))
+
+static inline unsigned int rdo_index(u32 rdo)
+{
+ return (rdo >> RDO_OBJ_POS_SHIFT) & RDO_OBJ_POS_MASK;
+}
+
+static inline unsigned int rdo_op_current(u32 rdo)
+{
+ return ((rdo >> RDO_FIXED_OP_CURR_SHIFT) & RDO_CURR_MASK) * 10;
+}
+
+static inline unsigned int rdo_max_current(u32 rdo)
+{
+ return ((rdo >> RDO_FIXED_MAX_CURR_SHIFT) &
+ RDO_CURR_MASK) * 10;
+}
+
+static inline unsigned int rdo_op_power(u32 rdo)
+{
+ return ((rdo >> RDO_BATT_OP_PWR_SHIFT) & RDO_PWR_MASK) * 250;
+}
+
+static inline unsigned int rdo_max_power(u32 rdo)
+{
+ return ((rdo >> RDO_BATT_MAX_PWR_SHIFT) & RDO_PWR_MASK) * 250;
+}
+
+/* Enter_USB Data Object */
+#define EUDO_USB_MODE_MASK GENMASK(30, 28)
+#define EUDO_USB_MODE_SHIFT 28
+#define EUDO_USB_MODE_USB2 0
+#define EUDO_USB_MODE_USB3 1
+#define EUDO_USB_MODE_USB4 2
+#define EUDO_USB4_DRD BIT(26)
+#define EUDO_USB3_DRD BIT(25)
+#define EUDO_CABLE_SPEED_MASK GENMASK(23, 21)
+#define EUDO_CABLE_SPEED_SHIFT 21
+#define EUDO_CABLE_SPEED_USB2 0
+#define EUDO_CABLE_SPEED_USB3_GEN1 1
+#define EUDO_CABLE_SPEED_USB4_GEN2 2
+#define EUDO_CABLE_SPEED_USB4_GEN3 3
+#define EUDO_CABLE_TYPE_MASK GENMASK(20, 19)
+#define EUDO_CABLE_TYPE_SHIFT 19
+#define EUDO_CABLE_TYPE_PASSIVE 0
+#define EUDO_CABLE_TYPE_RE_TIMER 1
+#define EUDO_CABLE_TYPE_RE_DRIVER 2
+#define EUDO_CABLE_TYPE_OPTICAL 3
+#define EUDO_CABLE_CURRENT_MASK GENMASK(18, 17)
+#define EUDO_CABLE_CURRENT_SHIFT 17
+#define EUDO_CABLE_CURRENT_NOTSUPP 0
+#define EUDO_CABLE_CURRENT_3A 2
+#define EUDO_CABLE_CURRENT_5A 3
+#define EUDO_PCIE_SUPPORT BIT(16)
+#define EUDO_DP_SUPPORT BIT(15)
+#define EUDO_TBT_SUPPORT BIT(14)
+#define EUDO_HOST_PRESENT BIT(13)
+
+/* USB PD timers and counters */
+#define PD_T_NO_RESPONSE 5000 /* 4.5 - 5.5 seconds */
+#define PD_T_DB_DETECT 10000 /* 10 - 15 seconds */
+#define PD_T_SEND_SOURCE_CAP 150 /* 100 - 200 ms */
+#define PD_T_SENDER_RESPONSE 60 /* 24 - 30 ms, relaxed */
+#define PD_T_RECEIVER_RESPONSE 15 /* 15ms max */
+#define PD_T_SOURCE_ACTIVITY 45
+#define PD_T_SINK_ACTIVITY 135
+#define PD_T_SINK_WAIT_CAP 310 /* 310 - 620 ms */
+#define PD_T_PS_TRANSITION 500
+#define PD_T_SRC_TRANSITION 35
+#define PD_T_DRP_SNK 40
+#define PD_T_DRP_SRC 30
+#define PD_T_PS_SOURCE_OFF 920
+#define PD_T_PS_SOURCE_ON 480
+#define PD_T_PS_SOURCE_ON_PRS 450 /* 390 - 480ms */
+#define PD_T_PS_HARD_RESET 30
+#define PD_T_SRC_RECOVER 760
+#define PD_T_SRC_RECOVER_MAX 1000
+#define PD_T_SRC_TURN_ON 275
+#define PD_T_SAFE_0V 650
+#define PD_T_VCONN_SOURCE_ON 100
+#define PD_T_SINK_REQUEST 100 /* 100 ms minimum */
+#define PD_T_ERROR_RECOVERY 100 /* minimum 25 is insufficient */
+#define PD_T_SRCSWAPSTDBY 625 /* Maximum of 650ms */
+#define PD_T_NEWSRC 250 /* Maximum of 275ms */
+#define PD_T_SWAP_SRC_START 20 /* Minimum of 20ms */
+#define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */
+#define PD_T_SINK_TX 16 /* 16 - 20 ms */
+#define PD_T_CHUNK_NOT_SUPP 42 /* 40 - 50 ms */
+
+#define PD_T_DRP_TRY 100 /* 75 - 150 ms */
+#define PD_T_DRP_TRYWAIT 600 /* 400 - 800 ms */
+
+#define PD_T_CC_DEBOUNCE 200 /* 100 - 200 ms */
+#define PD_T_PD_DEBOUNCE 20 /* 10 - 20 ms */
+#define PD_T_TRY_CC_DEBOUNCE 15 /* 10 - 20 ms */
+
+#define PD_N_CAPS_COUNT (PD_T_NO_RESPONSE / PD_T_SEND_SOURCE_CAP)
+#define PD_N_HARD_RESET_COUNT 1
+
+#define PD_P_SNK_STDBY_MW 2500 /* 2500 mW */
+
+/* Time to wait for TCPC to complete transmit */
+#define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */
+
+#endif /* __LINUX_USB_PD_H */
projects / u-boot.git / commitdiff