Re: [PATCH v1 4/6] power: cros_usbpd-charger: Add EC-based USB PD charger driver
From: Lee Jones
Date: Wed Feb 10 2016 - 11:49:56 EST
On Fri, 05 Feb 2016, Tomeu Vizoso wrote:
> From: Sameer Nanda <snanda@xxxxxxxxxxxx>
>
> This driver exposes the charger functionality in the PD EC to userspace.
>
> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
> Cc: Sameer Nanda <snanda@xxxxxxxxxxxx>
> Cc: Benson Leung <bleung@xxxxxxxxxxxx>
> Cc: Shawn Nematbakhsh <shawnn@xxxxxxxxxxxx>
> ---
>
> drivers/platform/chrome/cros_ec_proto.c | 37 ++
> drivers/power/Kconfig | 10 +
> drivers/power/Makefile | 1 +
> drivers/power/cros_usbpd-charger.c | 907 ++++++++++++++++++++++++++++++++
> include/linux/mfd/cros_ec.h | 28 +
> include/linux/mfd/cros_ec_commands.h | 324 +++++++++++-
> 6 files changed, 1302 insertions(+), 5 deletions(-)
> create mode 100644 drivers/power/cros_usbpd-charger.c
A 1300 line patch crossing 3 subsystems is not the way you should be
submitting code. Please split these up into separate commits. The
only time you should squash all this functionality into a single patch
is to mitigate otherwise unavoidable build issues. I do not believe
that's the case here.
> diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> index 6e138e2333f3..083a32461f2d 100644
> --- a/drivers/platform/chrome/cros_ec_proto.c
> +++ b/drivers/platform/chrome/cros_ec_proto.c
> @@ -482,3 +482,40 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev)
> return get_keyboard_state_event(ec_dev);
> }
> EXPORT_SYMBOL(cros_ec_get_next_event);
> +
> +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> + struct cros_ec_command *msg)
> +{
> + int ret = cros_ec_cmd_xfer(ec_dev, msg);
> +
> + if (ret < 0)
> + dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret);
> + else if (msg->result)
> + return -EECRESULT - msg->result;
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(cros_ec_cmd_xfer_status);
> +
> +u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)
> +{
> + u32 host_event;
> +
> + if (!ec_dev->mkbp_event_supported) {
> + dev_warn(ec_dev->dev,
> + "This EC does not support EC_MKBP_EVENT_HOST_EVENT");
> + return -EPROTONOSUPPORT;
> + }
> +
> + if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)
> + return 0;
> +
> + if (ec_dev->event_size != sizeof(host_event)) {
> + dev_warn(ec_dev->dev, "Invalid host event size\n");
> + return 0;
> + }
> +
> + host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);
> + return host_event;
> +}
> +EXPORT_SYMBOL(cros_ec_get_host_event);
> diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
> index 1ddd13cc0c07..26355850d91b 100644
> --- a/drivers/power/Kconfig
> +++ b/drivers/power/Kconfig
> @@ -502,6 +502,16 @@ config AXP20X_POWER
> This driver provides support for the power supply features of
> AXP20x PMIC.
>
> +config CHARGER_CROS_USB_PD
> + tristate "Chrome OS EC based USB PD charger"
> + depends on MFD_CROS_EC
> + default y
> + help
> + Say Y here to enable Chrome OS EC based USB PD charger driver. This
> + driver gets various bits of information about what is connected to
> + USB PD ports from the EC and converts that into power_supply
> + properties.
> +
> endif # POWER_SUPPLY
>
> source "drivers/power/reset/Kconfig"
> diff --git a/drivers/power/Makefile b/drivers/power/Makefile
> index 0e4eab55f8d7..b83685bfae61 100644
> --- a/drivers/power/Makefile
> +++ b/drivers/power/Makefile
> @@ -73,3 +73,4 @@ obj-$(CONFIG_CHARGER_TPS65217) += tps65217_charger.o
> obj-$(CONFIG_POWER_RESET) += reset/
> obj-$(CONFIG_AXP288_FUEL_GAUGE) += axp288_fuel_gauge.o
> obj-$(CONFIG_AXP288_CHARGER) += axp288_charger.o
> +obj-$(CONFIG_CHARGER_CROS_USB_PD) += cros_usbpd-charger.o
> diff --git a/drivers/power/cros_usbpd-charger.c b/drivers/power/cros_usbpd-charger.c
> new file mode 100644
> index 000000000000..72c427554b56
> --- /dev/null
> +++ b/drivers/power/cros_usbpd-charger.c
> @@ -0,0 +1,907 @@
> +/*
> + * Power supply driver for ChromeOS EC based USB PD Charger.
> + *
> + * Copyright (c) 2014 Google, Inc
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/fs.h>
> +#include <linux/ktime.h>
> +#include <linux/module.h>
> +#include <linux/mfd/cros_ec.h>
> +#include <linux/mfd/cros_ec_commands.h>
> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/rtc.h>
> +#include <linux/slab.h>
> +
> +#define CROS_USB_PD_MAX_PORTS 8
> +#define CROS_USB_PD_MAX_LOG_ENTRIES 30
> +
> +#define CROS_USB_PD_LOG_UPDATE_DELAY msecs_to_jiffies(60000)
> +#define CROS_USB_PD_CACHE_UPDATE_DELAY msecs_to_jiffies(500)
> +
> +/* Buffer + macro for building PDLOG string */
> +#define BUF_SIZE 80
> +#define APPEND_STRING(buf, len, str, ...) ((len) += \
> + snprintf((buf) + (len), max(BUF_SIZE - (len), 0), (str), ##__VA_ARGS__))
> +
> +#define CHARGER_DIR_NAME "CROS_USB_PD_CHARGER%d"
> +#define CHARGER_DIR_NAME_LENGTH sizeof(CHARGER_DIR_NAME)
> +
> +#define MANUFACTURER_MODEL_LENGTH 32
> +
> +struct port_data {
> + int port_number;
> + char name[CHARGER_DIR_NAME_LENGTH];
> + char manufacturer[MANUFACTURER_MODEL_LENGTH];
> + char model_name[MANUFACTURER_MODEL_LENGTH];
> + struct power_supply *psy;
> + struct power_supply_desc psy_desc;
> + int psy_type;
> + int psy_online;
> + int psy_status;
> + int psy_current_max;
> + int psy_voltage_max_design;
> + int psy_voltage_now;
> + int psy_power_max;
> + struct charger_data *charger;
> + unsigned long last_update;
> +};
> +
> +struct charger_data {
> + struct device *dev;
> + struct cros_ec_dev *ec_dev;
> + struct cros_ec_device *ec_device;
> + int num_charger_ports;
> + int num_registered_psy;
> + struct port_data *ports[CROS_USB_PD_MAX_PORTS];
> + struct delayed_work log_work;
> + struct workqueue_struct *log_workqueue;
> + struct notifier_block notifier;
> + bool suspended;
> +};
> +
> +#define EC_MAX_IN_SIZE EC_PROTO2_MAX_REQUEST_SIZE
> +#define EC_MAX_OUT_SIZE EC_PROTO2_MAX_RESPONSE_SIZE
> +uint8_t ec_inbuf[EC_MAX_IN_SIZE];
> +uint8_t ec_outbuf[EC_MAX_OUT_SIZE];
> +
> +static enum power_supply_property cros_usb_pd_charger_props[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_CURRENT_MAX,
> + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
> + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> + POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
> + POWER_SUPPLY_PROP_MODEL_NAME,
> + POWER_SUPPLY_PROP_MANUFACTURER,
> +};
> +
> +/* Current external voltage/current limit in mV/mA. Default to none. */
> +static uint16_t ext_voltage_lim = EC_POWER_LIMIT_NONE;
> +static uint16_t ext_current_lim = EC_POWER_LIMIT_NONE;
> +
> +static int ec_command(struct cros_ec_dev *ec_dev, int version, int command,
> + uint8_t *outdata, int outsize, uint8_t *indata,
> + int insize)
> +{
> + struct cros_ec_device *ec_device = ec_dev->ec_dev;
> + struct cros_ec_command *msg;
> + int ret;
> +
> + msg = kmalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL);
> + if (!msg)
> + return -ENOMEM;
> +
> + msg->version = version;
> + msg->command = ec_dev->cmd_offset + command;
> + msg->outsize = outsize;
> + msg->insize = insize;
> +
> + memcpy(msg->data, outdata, outsize);
> + ret = cros_ec_cmd_xfer_status(ec_device, msg);
> + memcpy(indata, msg->data, insize);
> +
> + kfree(msg);
> +
> + return ret;
> +}
> +
> +static int set_ec_usb_pd_override_ports(struct charger_data *charger,
> + int port_num)
> +{
> + struct device *dev = charger->dev;
> + struct ec_params_charge_port_override req;
> + int ret;
> +
> + req.override_port = port_num;
> +
> + ret = ec_command(charger->ec_dev, 0, EC_CMD_PD_CHARGE_PORT_OVERRIDE,
> + (uint8_t *)&req, sizeof(req),
> + NULL, 0);
> + if (ret < 0) {
> + dev_info(dev, "Port Override command returned 0x%x\n", ret);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int get_ec_num_ports(struct charger_data *charger, int *num_ports)
> +{
> + struct device *dev = charger->dev;
> + struct ec_response_usb_pd_ports *resp =
> + (struct ec_response_usb_pd_ports *)ec_inbuf;
> + int ret;
> +
> + *num_ports = 0;
> + ret = ec_command(charger->ec_dev, 0, EC_CMD_USB_PD_PORTS,
> + NULL, 0, ec_inbuf, EC_MAX_IN_SIZE);
> + if (ret < 0) {
> + dev_err(dev, "Unable to query PD ports (err:0x%x)\n", ret);
> + return ret;
> + }
> + *num_ports = resp->num_ports;
> + dev_dbg(dev, "Num ports = %d\n", *num_ports);
> +
> + return 0;
> +}
> +
> +static int get_ec_usb_pd_discovery_info(struct port_data *port)
> +{
> + struct charger_data *charger = port->charger;
> + struct device *dev = charger->dev;
> + struct ec_params_usb_pd_info_request req;
> + struct ec_params_usb_pd_discovery_entry resp;
> + int ret;
> +
> + req.port = port->port_number;
> +
> + ret = ec_command(charger->ec_dev, 0, EC_CMD_USB_PD_DISCOVERY,
> + (uint8_t *)&req, sizeof(req),
> + (uint8_t *)&resp, sizeof(resp));
> + if (ret < 0) {
> + dev_err(dev, "Unable to query Discovery info (err:0x%x)\n",
> + ret);
> + return -EINVAL;
> + }
> +
> + dev_dbg(dev, "Port %d: VID = 0x%x, PID=0x%x, PTYPE=0x%x\n",
> + port->port_number, resp.vid, resp.pid, resp.ptype);
> +
> + snprintf(port->manufacturer, MANUFACTURER_MODEL_LENGTH, "%x", resp.vid);
> + snprintf(port->model_name, MANUFACTURER_MODEL_LENGTH, "%x", resp.pid);
> +
> + return 0;
> +}
> +
> +static int get_ec_usb_pd_power_info(struct port_data *port)
> +{
> + struct charger_data *charger = port->charger;
> + struct device *dev = charger->dev;
> + struct ec_params_usb_pd_power_info req;
> + struct ec_response_usb_pd_power_info resp;
> + char role_str[80];
> + int ret, last_psy_status, last_psy_type;
> +
> + req.port = port->port_number;
> + ret = ec_command(charger->ec_dev, 0, EC_CMD_USB_PD_POWER_INFO,
> + (uint8_t *)&req, sizeof(req),
> + (uint8_t *)&resp, sizeof(resp));
> + if (ret < 0) {
> + dev_err(dev, "Unable to query PD power info (err:0x%x)\n", ret);
> + return -EINVAL;
> + }
> +
> + last_psy_status = port->psy_status;
> + last_psy_type = port->psy_type;
> +
> + switch (resp.role) {
> + case USB_PD_PORT_POWER_DISCONNECTED:
> + snprintf(role_str, sizeof(role_str), "%s", "DISCONNECTED");
> + port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + port->psy_online = 0;
> + break;
> + case USB_PD_PORT_POWER_SOURCE:
> + snprintf(role_str, sizeof(role_str), "%s", "SOURCE");
> + port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + port->psy_online = 0;
> + break;
> + case USB_PD_PORT_POWER_SINK:
> + snprintf(role_str, sizeof(role_str), "%s", "SINK");
> + port->psy_status = POWER_SUPPLY_STATUS_CHARGING;
> + port->psy_online = 1;
> + break;
> + case USB_PD_PORT_POWER_SINK_NOT_CHARGING:
> + snprintf(role_str, sizeof(role_str), "%s", "NOT CHARGING");
> + port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
> + port->psy_online = 1;
> + break;
> + default:
> + snprintf(role_str, sizeof(role_str), "%s", "UNKNOWN");
> + dev_err(dev, "Unknown role %d\n", resp.role);
> + break;
> + }
> +
> + port->psy_voltage_max_design = resp.meas.voltage_max;
> + port->psy_voltage_now = resp.meas.voltage_now;
> + port->psy_current_max = resp.meas.current_max;
> + port->psy_power_max = resp.max_power;
> +
> + switch (resp.type) {
> + case USB_CHG_TYPE_BC12_SDP:
> + case USB_CHG_TYPE_VBUS:
> + port->psy_type = POWER_SUPPLY_TYPE_USB;
> + break;
> + case USB_CHG_TYPE_NONE:
> + /*
> + * For dual-role devices when we are a source, the firmware
> + * reports the type as NONE. Report such chargers as type
> + * USB_PD_DRP.
> + */
> + if (resp.role == USB_PD_PORT_POWER_SOURCE && resp.dualrole)
> + port->psy_type = POWER_SUPPLY_TYPE_USB_PD_DRP;
> + else
> + port->psy_type = POWER_SUPPLY_TYPE_USB;
> + break;
> + case USB_CHG_TYPE_PROPRIETARY:
> + port->psy_type = POWER_SUPPLY_TYPE_MAINS;
> + break;
> + case USB_CHG_TYPE_C:
> + port->psy_type = POWER_SUPPLY_TYPE_USB_TYPE_C;
> + break;
> + case USB_CHG_TYPE_BC12_DCP:
> + port->psy_type = POWER_SUPPLY_TYPE_USB_DCP;
> + break;
> + case USB_CHG_TYPE_BC12_CDP:
> + port->psy_type = POWER_SUPPLY_TYPE_USB_CDP;
> + break;
> + case USB_CHG_TYPE_PD:
> + if (resp.dualrole)
> + port->psy_type = POWER_SUPPLY_TYPE_USB_PD_DRP;
> + else
> + port->psy_type = POWER_SUPPLY_TYPE_USB_PD;
> + break;
> + case USB_CHG_TYPE_UNKNOWN:
> + /*
> + * While the EC is trying to determine the type of charger that
> + * has been plugged in, it will report the charger type as
> + * unknown. Treat this case as a dedicated charger since we
> + * don't know any better just yet. Additionally since the power
> + * capabilities are unknown, report the max current and voltage
> + * as zero.
> + */
> + port->psy_type = POWER_SUPPLY_TYPE_MAINS;
> + port->psy_voltage_max_design = 0;
> + port->psy_current_max = 0;
> + break;
> + default:
> + dev_err(dev, "Port %d: default case!\n",
> + port->port_number);
> + port->psy_type = POWER_SUPPLY_TYPE_USB;
> + }
> +
> + port->psy_desc.type = port->psy_type;
> +
> + dev_dbg(dev,
> + "Port %d: %s type=%d=vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n",
> + port->port_number, role_str, resp.type,
> + resp.meas.voltage_max, resp.meas.voltage_now,
> + resp.meas.current_max, resp.meas.current_lim,
> + resp.max_power);
> +
> + /*
> + * If power supply type or status changed, explicitly call
> + * power_supply_changed. This results in udev event getting generated
> + * and allows user mode apps to react quicker instead of waiting for
> + * their next poll of power supply status.
> + */
> + if (last_psy_type != port->psy_type ||
> + last_psy_status != port->psy_status) {
> + dev_dbg(dev, "Port %d: Calling power_supply_changed\n",
> + port->port_number);
> + power_supply_changed(port->psy);
> + }
> +
> + return 0;
> +}
> +
> +static int get_ec_port_status(struct port_data *port, bool ratelimit)
> +{
> + int ret;
> +
> + if (ratelimit &&
> + time_is_after_jiffies(port->last_update +
> + CROS_USB_PD_CACHE_UPDATE_DELAY))
> + return 0;
> +
> + ret = get_ec_usb_pd_power_info(port);
> + if (ret < 0)
> + return ret;
> +
> + ret = get_ec_usb_pd_discovery_info(port);
> + port->last_update = jiffies;
> +
> + return ret;
> +}
> +
> +static void cros_usb_pd_charger_power_changed(struct power_supply *psy)
> +{
> + struct port_data *port = power_supply_get_drvdata(psy);
> + struct charger_data *charger = port->charger;
> + struct device *dev = charger->dev;
> + int i;
> +
> + dev_dbg(dev, "cros_usb_pd_charger_power_changed\n");
> + for (i = 0; i < charger->num_registered_psy; i++)
> + get_ec_port_status(charger->ports[i], false);
> +}
> +
> +static int cros_usb_pd_charger_get_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct port_data *port = power_supply_get_drvdata(psy);
> + struct charger_data *charger = port->charger;
> + struct device *dev = charger->dev;
> + int ret;
> +
> +
> + /* Only refresh ec_port_status for dynamic properties */
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CURRENT_MAX:
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
> + ret = get_ec_port_status(port, true);
> + if (ret < 0) {
> + dev_err(dev, "Failed to get port status (err:0x%x)\n",
> + ret);
> + return -EINVAL;
> + }
> + break;
> + default:
> + break;
> + }
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + val->intval = port->psy_online;
> + break;
> + case POWER_SUPPLY_PROP_STATUS:
> + val->intval = port->psy_status;
> + break;
> + case POWER_SUPPLY_PROP_CURRENT_MAX:
> + val->intval = port->psy_current_max * 1000;
> + break;
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
> + val->intval = port->psy_voltage_max_design * 1000;
> + break;
> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> + val->intval = port->psy_voltage_now * 1000;
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
> + /* TODO: send a TBD host command to the EC. */
> + val->intval = 0;
> + break;
> + case POWER_SUPPLY_PROP_MODEL_NAME:
> + val->strval = port->model_name;
> + break;
> + case POWER_SUPPLY_PROP_MANUFACTURER:
> + val->strval = port->manufacturer;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int cros_usb_pd_charger_set_prop(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct port_data *port = power_supply_get_drvdata(psy);
> + struct charger_data *charger = port->charger;
> + int port_number;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
> + /*
> + * A value of -1 implies switching to battery as the power
> + * source. Any other value implies using this port as the
> + * power source.
> + */
> + port_number = val->intval;
> + if (port_number != -1)
> + port_number = port->port_number;
> + return set_ec_usb_pd_override_ports(charger, port_number);
> + default:
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> +static int cros_usb_pd_charger_is_writeable(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + int ret;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
> + ret = 1;
> + break;
> + default:
> + ret = 0;
> + }
> +
> + return ret;
> +}
> +
> +static void cros_usb_pd_print_log_entry(struct ec_response_pd_log *r,
> + ktime_t tstamp)
> +{
> + static const char * const fault_names[] = {
> + "---", "OCP", "fast OCP", "OVP", "Discharge"
> + };
> + static const char * const role_names[] = {
> + "Disconnected", "SRC", "SNK", "SNK (not charging)"
> + };
> + static const char * const chg_type_names[] = {
> + "None", "PD", "Type-C", "Proprietary",
> + "DCP", "CDP", "SDP", "Other", "VBUS"
> + };
> + int i;
> + int role_idx, type_idx;
> + const char *fault, *role, *chg_type;
> + struct usb_chg_measures *meas;
> + struct mcdp_info *minfo;
> + struct rtc_time rt;
> + int len = 0;
> + char buf[BUF_SIZE + 1];
> +
> + /* the timestamp is the number of 1024th of seconds in the past */
> + tstamp = ktime_sub_us(tstamp,
> + (uint64_t)r->timestamp << PD_LOG_TIMESTAMP_SHIFT);
> + rt = rtc_ktime_to_tm(tstamp);
> +
> + switch (r->type) {
> + case PD_EVENT_MCU_CHARGE:
> + if (r->data & CHARGE_FLAGS_OVERRIDE)
> + APPEND_STRING(buf, len, "override ");
> + if (r->data & CHARGE_FLAGS_DELAYED_OVERRIDE)
> + APPEND_STRING(buf, len, "pending_override ");
> + role_idx = r->data & CHARGE_FLAGS_ROLE_MASK;
> + role = role_idx < ARRAY_SIZE(role_names) ?
> + role_names[role_idx] : "Unknown";
> + type_idx = (r->data & CHARGE_FLAGS_TYPE_MASK)
> + >> CHARGE_FLAGS_TYPE_SHIFT;
> + chg_type = type_idx < ARRAY_SIZE(chg_type_names) ?
> + chg_type_names[type_idx] : "???";
> +
> + if ((role_idx == USB_PD_PORT_POWER_DISCONNECTED) ||
> + (role_idx == USB_PD_PORT_POWER_SOURCE)) {
> + APPEND_STRING(buf, len, "%s", role);
> + break;
> + }
> +
> + meas = (struct usb_chg_measures *)r->payload;
> + APPEND_STRING(buf, len, "%s %s %s %dmV max %dmV / %dmA", role,
> + r->data & CHARGE_FLAGS_DUAL_ROLE ? "DRP" : "Charger",
> + chg_type,
> + meas->voltage_now,
> + meas->voltage_max,
> + meas->current_max);
> + break;
> + case PD_EVENT_ACC_RW_FAIL:
> + APPEND_STRING(buf, len, "RW signature check failed");
> + break;
> + case PD_EVENT_PS_FAULT:
> + fault = r->data < ARRAY_SIZE(fault_names) ? fault_names[r->data]
> + : "???";
> + APPEND_STRING(buf, len, "Power supply fault: %s", fault);
> + break;
> + case PD_EVENT_VIDEO_DP_MODE:
> + APPEND_STRING(buf, len, "DP mode %sabled",
> + (r->data == 1) ? "en" : "dis");
> + break;
> + case PD_EVENT_VIDEO_CODEC:
> + minfo = (struct mcdp_info *)r->payload;
> + APPEND_STRING(buf, len,
> + "HDMI info: family:%04x chipid:%04x irom:%d.%d.%d fw:%d.%d.%d",
> + MCDP_FAMILY(minfo->family),
> + MCDP_CHIPID(minfo->chipid),
> + minfo->irom.major, minfo->irom.minor,
> + minfo->irom.build, minfo->fw.major,
> + minfo->fw.minor, minfo->fw.build);
> + break;
> + default:
> + APPEND_STRING(buf, len,
> + "Event %02x (%04x) [", r->type, r->data);
> + for (i = 0; i < PD_LOG_SIZE(r->size_port); i++)
> + APPEND_STRING(buf, len, "%02x ", r->payload[i]);
> + APPEND_STRING(buf, len, "]");
> + break;
> + }
> +
> + pr_info("PDLOG %d/%02d/%02d %02d:%02d:%02d.%03d P%d %s\n",
> + rt.tm_year + 1900, rt.tm_mon + 1, rt.tm_mday,
> + rt.tm_hour, rt.tm_min, rt.tm_sec,
> + (int)(ktime_to_ms(tstamp) % MSEC_PER_SEC),
> + PD_LOG_PORT(r->size_port), buf);
> +}
> +
> +static void cros_usb_pd_log_check(struct work_struct *work)
> +{
> + struct charger_data *charger = container_of(to_delayed_work(work),
> + struct charger_data, log_work);
> + struct device *dev = charger->dev;
> + union {
> + struct ec_response_pd_log r;
> + uint32_t words[8]; /* space for the payload */
> + } u;
> + int ret;
> + int entries = 0;
> + ktime_t now;
> +
> + if (charger->suspended) {
> + dev_dbg(dev, "Suspended...bailing out\n");
> + return;
> + }
> +
> + while (entries++ < CROS_USB_PD_MAX_LOG_ENTRIES) {
> + ret = ec_command(charger->ec_dev, 0, EC_CMD_PD_GET_LOG_ENTRY,
> + NULL, 0, (uint8_t *)&u, sizeof(u));
> + now = ktime_get_real();
> + if (ret < 0) {
> + dev_dbg(dev, "Cannot get PD log %d\n", ret);
> + break;
> + }
> + if (u.r.type == PD_EVENT_NO_ENTRY)
> + break;
> +
> + cros_usb_pd_print_log_entry(&u.r, now);
> + }
> +
> + queue_delayed_work(charger->log_workqueue, &charger->log_work,
> + CROS_USB_PD_LOG_UPDATE_DELAY);
> +}
> +
> +static int cros_usb_pd_ec_event(struct notifier_block *nb,
> + unsigned long queued_during_suspend, void *_notify)
> +{
> + struct charger_data *charger;
> + struct device *dev;
> + struct cros_ec_device *ec_device;
> + u32 host_event;
> +
> + charger = container_of(nb, struct charger_data, notifier);
> + dev = charger->dev;
> + ec_device = charger->ec_device;
> +
> + host_event = cros_ec_get_host_event(ec_device);
> + if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)) {
> + cros_usb_pd_charger_power_changed(charger->ports[0]->psy);
> + return NOTIFY_OK;
> + } else {
> + return NOTIFY_DONE;
> + }
> +}
> +
> +static char *charger_supplied_to[] = {"cros-usb_pd-charger"};
> +
> +static int cros_usb_pd_charger_probe(struct platform_device *pd)
> +{
> + struct device *dev = &pd->dev;
> + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
> + struct cros_ec_device *ec_device;
> + struct charger_data *charger;
> + struct port_data *port;
> + struct power_supply_desc *psy_desc;
> + struct power_supply_config psy_cfg = {};
> + int i;
> + int ret = -EINVAL;
> +
> + dev_dbg(dev, "cros_usb_pd_charger_probe\n");
> + if (!ec_dev) {
> + WARN(1, "%s: No EC dev found\n", dev_name(dev));
> + return -EINVAL;
> + }
> +
> + ec_device = ec_dev->ec_dev;
> + if (!ec_device) {
> + WARN(1, "%s: No EC device found\n", dev_name(dev));
> + return -EINVAL;
> + }
> +
> + charger = devm_kzalloc(dev, sizeof(struct charger_data),
> + GFP_KERNEL);
> + if (!charger)
> + return -ENOMEM;
> +
> + charger->dev = dev;
> + charger->ec_dev = ec_dev;
> + charger->ec_device = ec_device;
> +
> + platform_set_drvdata(pd, charger);
> +
> + if (!charger->num_charger_ports) {
> + /*
> + * This can happen on a system that doesn't support USB PD.
> + * Log a message, but no need to warn.
> + */
> + dev_info(dev, "No charging ports found\n");
> + ret = -ENODEV;
> + goto fail_nowarn;
> + }
> +
> + for (i = 0; i < charger->num_charger_ports; i++) {
> + port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL);
> + if (!port) {
> + dev_err(dev, "Failed to alloc port structure\n");
> + ret = -ENOMEM;
> + goto fail;
> + }
> +
> + port->charger = charger;
> + port->port_number = i;
> + sprintf(port->name, CHARGER_DIR_NAME, i);
> +
> + psy_desc = &port->psy_desc;
> + psy_desc->name = port->name;
> + psy_desc->type = POWER_SUPPLY_TYPE_USB;
> + psy_desc->get_property = cros_usb_pd_charger_get_prop;
> + psy_desc->set_property = cros_usb_pd_charger_set_prop;
> + psy_desc->property_is_writeable =
> + cros_usb_pd_charger_is_writeable;
> + psy_desc->external_power_changed =
> + cros_usb_pd_charger_power_changed;
> + psy_desc->properties = cros_usb_pd_charger_props;
> + psy_desc->num_properties = ARRAY_SIZE(
> + cros_usb_pd_charger_props);
> +
> + psy_cfg.drv_data = port;
> + psy_cfg.supplied_to = charger_supplied_to;
> + psy_cfg.num_supplicants = ARRAY_SIZE(charger_supplied_to);
> +
> + port->psy = power_supply_register_no_ws(dev, psy_desc,
> + &psy_cfg);
> + if (IS_ERR(port->psy)) {
> + dev_err(dev, "Failed to register power supply: %ld\n",
> + PTR_ERR(port->psy));
> + continue;
> + }
> +
> + charger->ports[charger->num_registered_psy++] = port;
> + }
> +
> + if (!charger->num_registered_psy) {
> + ret = -ENODEV;
> + dev_err(dev, "No power supplies registered\n");
> + goto fail;
> + }
> +
> + if (ec_device->mkbp_event_supported) {
> + /* Get PD events from the EC */
> + charger->notifier.notifier_call = cros_usb_pd_ec_event;
> + ret = blocking_notifier_chain_register(
> + &ec_device->event_notifier, &charger->notifier);
> + if (ret < 0)
> + dev_warn(dev, "failed to register notifier\n");
> + }
> +
> + /* Retrieve PD event logs periodically */
> + INIT_DELAYED_WORK(&charger->log_work, cros_usb_pd_log_check);
> + charger->log_workqueue =
> + create_singlethread_workqueue("cros_usb_pd_log");
> + queue_delayed_work(charger->log_workqueue, &charger->log_work,
> + CROS_USB_PD_LOG_UPDATE_DELAY);
> +
> + return 0;
> +
> +fail:
> + WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret);
> +
> +fail_nowarn:
> + if (charger) {
> + for (i = 0; i < charger->num_registered_psy; i++) {
> + port = charger->ports[i];
> + power_supply_unregister(port->psy);
> + devm_kfree(dev, port);
> + }
> + platform_set_drvdata(pd, NULL);
> + devm_kfree(dev, charger);
> + }
> +
> + dev_info(dev, "Failing probe (err:0x%x)\n", ret);
> + return ret;
> +}
> +
> +static int cros_usb_pd_charger_remove(struct platform_device *pd)
> +{
> + struct charger_data *charger = platform_get_drvdata(pd);
> + struct device *dev = charger->dev;
> + struct port_data *port;
> + int i;
> +
> + if (charger) {
> + for (i = 0; i < charger->num_registered_psy; i++) {
> + port = charger->ports[i];
> + power_supply_unregister(port->psy);
> + devm_kfree(dev, port);
> + }
> + flush_delayed_work(&charger->log_work);
> + platform_set_drvdata(pd, NULL);
> + devm_kfree(dev, charger);
> + }
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int cros_usb_pd_charger_resume(struct device *dev)
> +{
> + struct charger_data *charger = dev_get_drvdata(dev);
> + int i;
> +
> + if (!charger)
> + return 0;
> +
> + charger->suspended = false;
> +
> + dev_dbg(dev, "cros_usb_pd_charger_resume: updating power supplies\n");
> + for (i = 0; i < charger->num_registered_psy; i++) {
> + power_supply_changed(charger->ports[i]->psy);
> + charger->ports[i]->last_update =
> + jiffies - CROS_USB_PD_CACHE_UPDATE_DELAY;
> + }
> + queue_delayed_work(charger->log_workqueue, &charger->log_work,
> + CROS_USB_PD_LOG_UPDATE_DELAY);
> +
> + return 0;
> +}
> +
> +static int cros_usb_pd_charger_suspend(struct device *dev)
> +{
> + struct charger_data *charger = dev_get_drvdata(dev);
> +
> + charger->suspended = true;
> +
> + if (charger)
> + flush_delayed_work(&charger->log_work);
> + return 0;
> +}
> +#endif
> +
> +static int set_ec_ext_power_limit(struct cros_ec_dev *ec,
> + uint16_t current_lim, uint16_t voltage_lim)
> +{
> + struct ec_params_external_power_limit_v1 req;
> + int ret;
> +
> + req.current_lim = current_lim;
> + req.voltage_lim = voltage_lim;
> +
> + ret = ec_command(ec, 0, EC_CMD_EXT_POWER_CURRENT_LIMIT,
> + (uint8_t *)&req, sizeof(req), NULL, 0);
> + if (ret < 0) {
> + dev_warn(ec->dev,
> + "External power limit command returned 0x%x\n",
> + ret);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static ssize_t get_ec_ext_current_lim(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + return scnprintf(buf, PAGE_SIZE, "%d\n", ext_current_lim);
> +}
> +
> +static ssize_t set_ec_ext_current_lim(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int ret;
> + uint16_t tmp_val;
> + struct cros_ec_dev *ec = container_of(
> + dev, struct cros_ec_dev, class_dev);
> +
> + if (kstrtou16(buf, 0, &tmp_val) < 0)
> + return -EINVAL;
> +
> + ret = set_ec_ext_power_limit(ec, tmp_val, ext_voltage_lim);
> + if (ret < 0)
> + return ret;
> +
> + ext_current_lim = tmp_val;
> + if (ext_current_lim == EC_POWER_LIMIT_NONE)
> + dev_info(ec->dev, "External current limit removed\n");
> + else
> + dev_info(ec->dev, "External current limit set to %dmA\n",
> + ext_current_lim);
> +
> + return count;
> +}
> +
> +static ssize_t get_ec_ext_voltage_lim(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + return scnprintf(buf, PAGE_SIZE, "%d\n", ext_voltage_lim);
> +}
> +
> +static ssize_t set_ec_ext_voltage_lim(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + int ret;
> + uint16_t tmp_val;
> +
> + struct cros_ec_dev *ec = container_of(
> + dev, struct cros_ec_dev, class_dev);
> +
> + if (kstrtou16(buf, 0, &tmp_val) < 0)
> + return -EINVAL;
> +
> + ret = set_ec_ext_power_limit(ec, ext_current_lim, tmp_val);
> + if (ret < 0)
> + return ret;
> +
> + ext_voltage_lim = tmp_val;
> + if (ext_voltage_lim == EC_POWER_LIMIT_NONE)
> + dev_info(ec->dev, "External voltage limit removed\n");
> + else
> + dev_info(ec->dev, "External voltage limit set to %dmV\n",
> + ext_voltage_lim);
> +
> + return count;
> +}
> +
> +static DEVICE_ATTR(ext_current_lim, S_IWUSR | S_IWGRP | S_IRUGO,
> + get_ec_ext_current_lim,
> + set_ec_ext_current_lim);
> +static DEVICE_ATTR(ext_voltage_lim, S_IWUSR | S_IWGRP | S_IRUGO,
> + get_ec_ext_voltage_lim,
> + set_ec_ext_voltage_lim);
> +
> +static struct attribute *__ext_power_cmds_attrs[] = {
> + &dev_attr_ext_current_lim.attr,
> + &dev_attr_ext_voltage_lim.attr,
> + NULL,
> +};
> +
> +struct attribute_group cros_usb_pd_charger_attr_group = {
> + .name = "usb-pd-charger",
> + .attrs = __ext_power_cmds_attrs,
> +};
> +
> +static SIMPLE_DEV_PM_OPS(cros_usb_pd_charger_pm_ops,
> + cros_usb_pd_charger_suspend, cros_usb_pd_charger_resume);
> +
> +static struct platform_driver cros_usb_pd_charger_driver = {
> + .driver = {
> + .name = "cros-usb-pd-charger",
> + .owner = THIS_MODULE,
> + .pm = &cros_usb_pd_charger_pm_ops,
> + },
> + .probe = cros_usb_pd_charger_probe,
> + .remove = cros_usb_pd_charger_remove,
> +};
> +
> +module_platform_driver(cros_usb_pd_charger_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Chrome USB PD charger");
> +MODULE_ALIAS("power_supply:cros-usb-pd-charger");
> diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
> index 8a8fa75178c6..c21583411ba0 100644
> --- a/include/linux/mfd/cros_ec.h
> +++ b/include/linux/mfd/cros_ec.h
> @@ -40,6 +40,9 @@
> #define EC_MAX_REQUEST_OVERHEAD 1
> #define EC_MAX_RESPONSE_OVERHEAD 2
>
> +/* ec_command return value for non-success result from EC */
> +#define EECRESULT 1000
> +
> /*
> * Command interface between EC and AP, for LPC, I2C and SPI interfaces.
> */
> @@ -250,6 +253,21 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
> struct cros_ec_command *msg);
>
> /**
> + * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC
> + *
> + * This function is identical to cros_ec_cmd_xfer, except it returns succes
> + * status only if both the command was transmitted successfully and the EC
> + * replied with success status. It's not necessary to check msg->result when
> + * using this function.
> + *
> + * @ec_dev: EC device
> + * @msg: Message to write
> + * @return: Num. of bytes transferred on success, <0 on failure
> + */
> +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
> + struct cros_ec_command *msg);
> +
> +/**
> * cros_ec_remove - Remove a ChromeOS EC
> *
> * Call this to deregister a ChromeOS EC, then clean up any private data.
> @@ -286,6 +304,16 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev);
> */
> int cros_ec_get_next_event(struct cros_ec_device *ec_dev);
>
> +/**
> + * cros_ec_get_host_event - Return a mask of event set by the EC.
> + *
> + * Returns the mask of the event that caused the last interrupt to be raised.
> + *
> + * @ec_dev: Device to fetch event from
> + * @return event mask, 0 on error
> + */
> +uint32_t cros_ec_get_host_event(struct cros_ec_device *ec_dev);
> +
> /* sysfs stuff */
> extern struct attribute_group cros_ec_attr_group;
> extern struct attribute_group cros_ec_lightbar_attr_group;
> diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
> index d86526f0bd8e..4f056d2747ff 100644
> --- a/include/linux/mfd/cros_ec_commands.h
> +++ b/include/linux/mfd/cros_ec_commands.h
> @@ -286,6 +286,9 @@ enum host_event_code {
> /* Hang detect logic detected a hang and warm rebooted the AP */
> EC_HOST_EVENT_HANG_REBOOT = 21,
>
> + /* PD MCU triggering host event */
> + EC_HOST_EVENT_PD_MCU = 22,
> +
> /*
> * The high bit of the event mask is not used as a host event code. If
> * it reads back as set, then the entire event mask should be
> @@ -2273,6 +2276,13 @@ struct ec_params_ext_power_current_limit {
> uint32_t limit; /* in mA */
> } __packed;
>
> +struct ec_params_external_power_limit_v1 {
> + uint16_t current_lim; /* in mA, or EC_POWER_LIMIT_NONE to clear limit */
> + uint16_t voltage_lim; /* in mV, or EC_POWER_LIMIT_NONE to clear limit */
> +} __packed;
> +
> +#define EC_POWER_LIMIT_NONE 0xffff
> +
> /*****************************************************************************/
> /* Smart battery pass-through */
>
> @@ -2527,8 +2537,6 @@ struct ec_params_reboot_ec {
> */
> #define EC_CMD_VERSION0 0xdc
>
> -#endif /* !__ACPI__ */
> -
> /*****************************************************************************/
> /*
> * PD commands
> @@ -2538,16 +2546,51 @@ struct ec_params_reboot_ec {
>
> /* EC to PD MCU exchange status command */
> #define EC_CMD_PD_EXCHANGE_STATUS 0x100
> +#define EC_VER_PD_EXCHANGE_STATUS 2
> +
> +enum pd_charge_state {
> + PD_CHARGE_NO_CHANGE = 0, /* Don't change charge state */
> + PD_CHARGE_NONE, /* No charging allowed */
> + PD_CHARGE_5V, /* 5V charging only */
> + PD_CHARGE_MAX /* Charge at max voltage */
> +};
>
> /* Status of EC being sent to PD */
> +#define EC_STATUS_HIBERNATING (1 << 0)
> +
> struct ec_params_pd_status {
> - int8_t batt_soc; /* battery state of charge */
> + uint8_t status; /* EC status */
> + int8_t batt_soc; /* battery state of charge */
> + uint8_t charge_state; /* charging state (from enum pd_charge_state) */
> } __packed;
>
> /* Status of PD being sent back to EC */
> +#define PD_STATUS_HOST_EVENT (1 << 0) /* Forward host event to AP */
> +#define PD_STATUS_IN_RW (1 << 1) /* Running RW image */
> +#define PD_STATUS_JUMPED_TO_IMAGE (1 << 2) /* Current image was jumped to */
> +#define PD_STATUS_TCPC_ALERT_0 (1 << 3) /* Alert active in port 0 TCPC */
> +#define PD_STATUS_TCPC_ALERT_1 (1 << 4) /* Alert active in port 1 TCPC */
> +#define PD_STATUS_TCPC_ALERT_2 (1 << 5) /* Alert active in port 2 TCPC */
> +#define PD_STATUS_TCPC_ALERT_3 (1 << 6) /* Alert active in port 3 TCPC */
> +#define PD_STATUS_EC_INT_ACTIVE (PD_STATUS_TCPC_ALERT_0 | \
> + PD_STATUS_TCPC_ALERT_1 | \
> + PD_STATUS_HOST_EVENT)
> struct ec_response_pd_status {
> - int8_t status; /* PD MCU status */
> - uint32_t curr_lim_ma; /* input current limit */
> + uint32_t curr_lim_ma; /* input current limit */
> + uint16_t status; /* PD MCU status */
> + int8_t active_charge_port; /* active charging port */
> +} __packed;
> +
> +/* AP to PD MCU host event status command, cleared on read */
> +#define EC_CMD_PD_HOST_EVENT_STATUS 0x104
> +
> +/* PD MCU host event status bits */
> +#define PD_EVENT_UPDATE_DEVICE (1 << 0)
> +#define PD_EVENT_POWER_CHANGE (1 << 1)
> +#define PD_EVENT_IDENTITY_RECEIVED (1 << 2)
> +#define PD_EVENT_DATA_SWAP (1 << 3)
> +struct ec_response_host_event_status {
> + uint32_t status; /* PD MCU host event status */
> } __packed;
>
> /* Set USB type-C port role and muxes */
> @@ -2559,6 +2602,7 @@ enum usb_pd_control_role {
> USB_PD_CTRL_ROLE_TOGGLE_OFF = 2,
> USB_PD_CTRL_ROLE_FORCE_SINK = 3,
> USB_PD_CTRL_ROLE_FORCE_SOURCE = 4,
> + USB_PD_CTRL_ROLE_COUNT
> };
>
> enum usb_pd_control_mux {
> @@ -2568,14 +2612,284 @@ enum usb_pd_control_mux {
> USB_PD_CTRL_MUX_DP = 3,
> USB_PD_CTRL_MUX_DOCK = 4,
> USB_PD_CTRL_MUX_AUTO = 5,
> + USB_PD_CTRL_MUX_COUNT
> +};
> +
> +enum usb_pd_control_swap {
> + USB_PD_CTRL_SWAP_NONE = 0,
> + USB_PD_CTRL_SWAP_DATA = 1,
> + USB_PD_CTRL_SWAP_POWER = 2,
> + USB_PD_CTRL_SWAP_VCONN = 3,
> + USB_PD_CTRL_SWAP_COUNT
> };
>
> struct ec_params_usb_pd_control {
> uint8_t port;
> uint8_t role;
> uint8_t mux;
> + uint8_t swap;
> +} __packed;
> +
> +#define PD_CTRL_RESP_ENABLED_COMMS (1 << 0) /* Communication enabled */
> +#define PD_CTRL_RESP_ENABLED_CONNECTED (1 << 1) /* Device connected */
> +#define PD_CTRL_RESP_ENABLED_PD_CAPABLE (1 << 2) /* Partner is PD capable */
> +
> +#define PD_CTRL_RESP_ROLE_POWER (1 << 0) /* 0=SNK/1=SRC */
> +#define PD_CTRL_RESP_ROLE_DATA (1 << 1) /* 0=UFP/1=DFP */
> +#define PD_CTRL_RESP_ROLE_VCONN (1 << 2) /* Vconn status */
> +#define PD_CTRL_RESP_ROLE_DR_POWER (1 << 3) /* Partner is dualrole power */
> +#define PD_CTRL_RESP_ROLE_DR_DATA (1 << 4) /* Partner is dualrole data */
> +#define PD_CTRL_RESP_ROLE_USB_COMM (1 << 5) /* Partner USB comm capable */
> +#define PD_CTRL_RESP_ROLE_EXT_POWERED (1 << 6) /* Partner externally powerd */
> +
> +struct ec_response_usb_pd_control {
> + uint8_t enabled;
> + uint8_t role;
> + uint8_t polarity;
> + uint8_t state;
> +} __packed;
> +
> +struct ec_response_usb_pd_control_v1 {
> + uint8_t enabled;
> + uint8_t role;
> + uint8_t polarity;
> + char state[32];
> +} __packed;
> +
> +#define EC_CMD_USB_PD_PORTS 0x102
> +
> +struct ec_response_usb_pd_ports {
> + uint8_t num_ports;
> +} __packed;
> +
> +#define EC_CMD_USB_PD_POWER_INFO 0x103
> +
> +#define PD_POWER_CHARGING_PORT 0xff
> +struct ec_params_usb_pd_power_info {
> + uint8_t port;
> +} __packed;
> +
> +enum usb_chg_type {
> + USB_CHG_TYPE_NONE,
> + USB_CHG_TYPE_PD,
> + USB_CHG_TYPE_C,
> + USB_CHG_TYPE_PROPRIETARY,
> + USB_CHG_TYPE_BC12_DCP,
> + USB_CHG_TYPE_BC12_CDP,
> + USB_CHG_TYPE_BC12_SDP,
> + USB_CHG_TYPE_OTHER,
> + USB_CHG_TYPE_VBUS,
> + USB_CHG_TYPE_UNKNOWN,
> +};
> +enum usb_power_roles {
> + USB_PD_PORT_POWER_DISCONNECTED,
> + USB_PD_PORT_POWER_SOURCE,
> + USB_PD_PORT_POWER_SINK,
> + USB_PD_PORT_POWER_SINK_NOT_CHARGING,
> +};
> +
> +struct usb_chg_measures {
> + uint16_t voltage_max;
> + uint16_t voltage_now;
> + uint16_t current_max;
> + uint16_t current_lim;
> +} __packed;
> +
> +struct ec_response_usb_pd_power_info {
> + uint8_t role;
> + uint8_t type;
> + uint8_t dualrole;
> + uint8_t reserved1;
> + struct usb_chg_measures meas;
> + uint32_t max_power;
> +} __packed;
> +
> +/* Write USB-PD device FW */
> +#define EC_CMD_USB_PD_FW_UPDATE 0x110
> +
> +enum usb_pd_fw_update_cmds {
> + USB_PD_FW_REBOOT,
> + USB_PD_FW_FLASH_ERASE,
> + USB_PD_FW_FLASH_WRITE,
> + USB_PD_FW_ERASE_SIG,
> +};
> +
> +struct ec_params_usb_pd_fw_update {
> + uint16_t dev_id;
> + uint8_t cmd;
> + uint8_t port;
> + uint32_t size; /* Size to write in bytes */
> + /* Followed by data to write */
> +} __packed;
> +
> +/* Write USB-PD Accessory RW_HASH table entry */
> +#define EC_CMD_USB_PD_RW_HASH_ENTRY 0x111
> +/* RW hash is first 20 bytes of SHA-256 of RW section */
> +#define PD_RW_HASH_SIZE 20
> +struct ec_params_usb_pd_rw_hash_entry {
> + uint16_t dev_id;
> + uint8_t dev_rw_hash[PD_RW_HASH_SIZE];
> + uint8_t reserved; /* For alignment of current_image */
> + uint32_t current_image; /* One of ec_current_image */
> +} __packed;
> +
> +/* Read USB-PD Accessory info */
> +#define EC_CMD_USB_PD_DEV_INFO 0x112
> +
> +struct ec_params_usb_pd_info_request {
> + uint8_t port;
> +} __packed;
> +
> +/* Read USB-PD Device discovery info */
> +#define EC_CMD_USB_PD_DISCOVERY 0x113
> +struct ec_params_usb_pd_discovery_entry {
> + uint16_t vid; /* USB-IF VID */
> + uint16_t pid; /* USB-IF PID */
> + uint8_t ptype; /* product type (hub,periph,cable,ama) */
> +} __packed;
> +
> +/* Override default charge behavior */
> +#define EC_CMD_PD_CHARGE_PORT_OVERRIDE 0x114
> +
> +/* Negative port parameters have special meaning */
> +enum usb_pd_override_ports {
> + OVERRIDE_DONT_CHARGE = -2,
> + OVERRIDE_OFF = -1,
> + /* [0, CONFIG_USB_PD_PORT_COUNT): Port# */
> +};
> +
> +struct ec_params_charge_port_override {
> + int16_t override_port; /* Override port# */
> +} __packed;
> +
> +/* Read (and delete) one entry of PD event log */
> +#define EC_CMD_PD_GET_LOG_ENTRY 0x115
> +
> +struct ec_response_pd_log {
> + uint32_t timestamp; /* relative timestamp in milliseconds */
> + uint8_t type; /* event type : see PD_EVENT_xx below */
> + uint8_t size_port; /* [7:5] port number [4:0] payload size in bytes */
> + uint16_t data; /* type-defined data payload */
> + uint8_t payload[0]; /* optional additional data payload: 0..16 bytes */
> +} __packed;
> +
> +
> +/* The timestamp is the microsecond counter shifted to get about a ms. */
> +#define PD_LOG_TIMESTAMP_SHIFT 10 /* 1 LSB = 1024us */
> +
> +#define PD_LOG_SIZE_MASK 0x1f
> +#define PD_LOG_PORT_MASK 0xe0
> +#define PD_LOG_PORT_SHIFT 5
> +#define PD_LOG_PORT_SIZE(port, size) (((port) << PD_LOG_PORT_SHIFT) | \
> + ((size) & PD_LOG_SIZE_MASK))
> +#define PD_LOG_PORT(size_port) ((size_port) >> PD_LOG_PORT_SHIFT)
> +#define PD_LOG_SIZE(size_port) ((size_port) & PD_LOG_SIZE_MASK)
> +
> +/* PD event log : entry types */
> +/* PD MCU events */
> +#define PD_EVENT_MCU_BASE 0x00
> +#define PD_EVENT_MCU_CHARGE (PD_EVENT_MCU_BASE+0)
> +#define PD_EVENT_MCU_CONNECT (PD_EVENT_MCU_BASE+1)
> +/* Reserved for custom board event */
> +#define PD_EVENT_MCU_BOARD_CUSTOM (PD_EVENT_MCU_BASE+2)
> +/* PD generic accessory events */
> +#define PD_EVENT_ACC_BASE 0x20
> +#define PD_EVENT_ACC_RW_FAIL (PD_EVENT_ACC_BASE+0)
> +#define PD_EVENT_ACC_RW_ERASE (PD_EVENT_ACC_BASE+1)
> +/* PD power supply events */
> +#define PD_EVENT_PS_BASE 0x40
> +#define PD_EVENT_PS_FAULT (PD_EVENT_PS_BASE+0)
> +/* PD video dongles events */
> +#define PD_EVENT_VIDEO_BASE 0x60
> +#define PD_EVENT_VIDEO_DP_MODE (PD_EVENT_VIDEO_BASE+0)
> +#define PD_EVENT_VIDEO_CODEC (PD_EVENT_VIDEO_BASE+1)
> +/* Returned in the "type" field, when there is no entry available */
> +#define PD_EVENT_NO_ENTRY 0xff
> +
> +/*
> + * PD_EVENT_MCU_CHARGE event definition :
> + * the payload is "struct usb_chg_measures"
> + * the data field contains the port state flags as defined below :
> + */
> +/* Port partner is a dual role device */
> +#define CHARGE_FLAGS_DUAL_ROLE (1 << 15)
> +/* Port is the pending override port */
> +#define CHARGE_FLAGS_DELAYED_OVERRIDE (1 << 14)
> +/* Port is the override port */
> +#define CHARGE_FLAGS_OVERRIDE (1 << 13)
> +/* Charger type */
> +#define CHARGE_FLAGS_TYPE_SHIFT 3
> +#define CHARGE_FLAGS_TYPE_MASK (0xf << CHARGE_FLAGS_TYPE_SHIFT)
> +/* Power delivery role */
> +#define CHARGE_FLAGS_ROLE_MASK (7 << 0)
> +
> +/*
> + * PD_EVENT_PS_FAULT data field flags definition :
> + */
> +#define PS_FAULT_OCP 1
> +#define PS_FAULT_FAST_OCP 2
> +#define PS_FAULT_OVP 3
> +#define PS_FAULT_DISCH 4
> +
> +/*
> + * PD_EVENT_VIDEO_CODEC payload is "struct mcdp_info".
> + */
> +struct mcdp_version {
> + uint8_t major;
> + uint8_t minor;
> + uint16_t build;
> } __packed;
>
> +struct mcdp_info {
> + uint8_t family[2];
> + uint8_t chipid[2];
> + struct mcdp_version irom;
> + struct mcdp_version fw;
> +} __packed;
> +
> +/* struct mcdp_info field decoding */
> +#define MCDP_CHIPID(chipid) ((chipid[0] << 8) | chipid[1])
> +#define MCDP_FAMILY(family) ((family[0] << 8) | family[1])
> +
> +/* Get/Set USB-PD Alternate mode info */
> +#define EC_CMD_USB_PD_GET_AMODE 0x116
> +struct ec_params_usb_pd_get_mode_request {
> + uint16_t svid_idx; /* SVID index to get */
> + uint8_t port; /* port */
> +} __packed;
> +
> +struct ec_params_usb_pd_get_mode_response {
> + uint16_t svid; /* SVID */
> + uint16_t opos; /* Object Position */
> + uint32_t vdo[6]; /* Mode VDOs */
> +} __packed;
> +
> +#define EC_CMD_USB_PD_SET_AMODE 0x117
> +
> +enum pd_mode_cmd {
> + PD_EXIT_MODE = 0,
> + PD_ENTER_MODE = 1,
> + /* Not a command. Do NOT remove. */
> + PD_MODE_CMD_COUNT,
> +};
> +
> +struct ec_params_usb_pd_set_mode_request {
> + uint32_t cmd; /* enum pd_mode_cmd */
> + uint16_t svid; /* SVID to set */
> + uint8_t opos; /* Object Position */
> + uint8_t port; /* port */
> +} __packed;
> +
> +/* Ask the PD MCU to record a log of a requested type */
> +#define EC_CMD_PD_WRITE_LOG_ENTRY 0x118
> +
> +struct ec_params_pd_write_log_entry {
> + uint8_t type; /* event type : see PD_EVENT_xx above */
> + uint8_t port; /* port#, or 0 for events unrelated to a given port */
> +} __packed;
> +
> +#endif /* !__ACPI__ */
> +
> /*****************************************************************************/
> /*
> * Passthru commands
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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