| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 25 Apr 2015 18:35:15 -0700
From: Gwendal Grignou <gwendal@...omium.org>
To: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc: Olof Johansson <olof@...om.net>, Lee Jones <lee.jones@...aro.org>,
Doug Anderson <dianders@...omium.org>,
Bill Richardson <wfrichar@...omium.org>,
Simon Glass <sjg@...gle.com>,
Stephen Barber <smbarber@...omium.org>,
Filipe Brandenburger <filbranden@...gle.com>,
Todd Broch <tbroch@...omium.org>,
linux-samsung-soc@...r.kernel.org,
Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 6/8] mfd: cros_ec: rev cros_ec_commands.h
Reviewed-by: Gwendal Grignou <gwendal@...omium.org>
Tested-by: Gwendal Grignou <gwendal@...omium.org>
On Mon, Apr 6, 2015 at 9:15 AM, Javier Martinez Canillas
<javier.martinez@...labora.co.uk> wrote:
> From: Stephen Barber <smbarber@...omium.org>
>
> Update cros_ec_commands.h to the latest version in the EC
> firmware sources and add power domain and passthru commands.
>
> Also, update lightbar to use new command names.
>
> Signed-off-by: Stephen Barber <smbarber@...omium.org>
> Reviewed-by: Randall Spangler <rspangler@...omium.org>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
> drivers/platform/chrome/cros_ec_lightbar.c | 14 +-
> include/linux/mfd/cros_ec_commands.h | 277 ++++++++++++++++++++++++++---
> 2 files changed, 262 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
> index 8ffec6649ead..38a9e58a9d2c 100644
> --- a/drivers/platform/chrome/cros_ec_lightbar.c
> +++ b/drivers/platform/chrome/cros_ec_lightbar.c
> @@ -196,8 +196,8 @@ static ssize_t brightness_store(struct device *dev,
> return -ENOMEM;
>
> param = (struct ec_params_lightbar *)msg->data;
> - param->cmd = LIGHTBAR_CMD_BRIGHTNESS;
> - param->brightness.num = val;
> + param->cmd = LIGHTBAR_CMD_SET_BRIGHTNESS;
> + param->set_brightness.num = val;
> ret = lb_throttle();
> if (ret)
> goto exit;
> @@ -252,11 +252,11 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
>
> if (i == 4) {
> param = (struct ec_params_lightbar *)msg->data;
> - param->cmd = LIGHTBAR_CMD_RGB;
> - param->rgb.led = val[0];
> - param->rgb.red = val[1];
> - param->rgb.green = val[2];
> - param->rgb.blue = val[3];
> + param->cmd = LIGHTBAR_CMD_SET_RGB;
> + param->set_rgb.led = val[0];
> + param->set_rgb.red = val[1];
> + param->set_rgb.green = val[2];
> + param->set_rgb.blue = val[3];
> /*
> * Throttle only the first of every four transactions,
> * so that the user can update all four LEDs at once.
> diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
> index a49cd41feea7..13b630c10d4c 100644
> --- a/include/linux/mfd/cros_ec_commands.h
> +++ b/include/linux/mfd/cros_ec_commands.h
> @@ -515,7 +515,7 @@ struct ec_host_response {
> /*
> * Notes on commands:
> *
> - * Each command is an 8-byte command value. Commands which take params or
> + * Each command is an 16-bit command value. Commands which take params or
> * return response data specify structs for that data. If no struct is
> * specified, the command does not input or output data, respectively.
> * Parameter/response length is implicit in the structs. Some underlying
> @@ -966,7 +966,7 @@ struct rgb_s {
> /* List of tweakable parameters. NOTE: It's __packed so it can be sent in a
> * host command, but the alignment is the same regardless. Keep it that way.
> */
> -struct lightbar_params {
> +struct lightbar_params_v0 {
> /* Timing */
> int32_t google_ramp_up;
> int32_t google_ramp_down;
> @@ -1000,32 +1000,81 @@ struct lightbar_params {
> struct rgb_s color[8]; /* 0-3 are Google colors */
> } __packed;
>
> +struct lightbar_params_v1 {
> + /* Timing */
> + int32_t google_ramp_up;
> + int32_t google_ramp_down;
> + int32_t s3s0_ramp_up;
> + int32_t s0_tick_delay[2]; /* AC=0/1 */
> + int32_t s0a_tick_delay[2]; /* AC=0/1 */
> + int32_t s0s3_ramp_down;
> + int32_t s3_sleep_for;
> + int32_t s3_ramp_up;
> + int32_t s3_ramp_down;
> + int32_t tap_tick_delay;
> + int32_t tap_display_time;
> +
> + /* Tap-for-battery params */
> + uint8_t tap_pct_red;
> + uint8_t tap_pct_green;
> + uint8_t tap_seg_min_on;
> + uint8_t tap_seg_max_on;
> + uint8_t tap_seg_osc;
> + uint8_t tap_idx[3];
> +
> + /* Oscillation */
> + uint8_t osc_min[2]; /* AC=0/1 */
> + uint8_t osc_max[2]; /* AC=0/1 */
> + uint8_t w_ofs[2]; /* AC=0/1 */
> +
> + /* Brightness limits based on the backlight and AC. */
> + uint8_t bright_bl_off_fixed[2]; /* AC=0/1 */
> + uint8_t bright_bl_on_min[2]; /* AC=0/1 */
> + uint8_t bright_bl_on_max[2]; /* AC=0/1 */
> +
> + /* Battery level thresholds */
> + uint8_t battery_threshold[LB_BATTERY_LEVELS - 1];
> +
> + /* Map [AC][battery_level] to color index */
> + uint8_t s0_idx[2][LB_BATTERY_LEVELS]; /* AP is running */
> + uint8_t s3_idx[2][LB_BATTERY_LEVELS]; /* AP is sleeping */
> +
> + /* Color palette */
> + struct rgb_s color[8]; /* 0-3 are Google colors */
> +} __packed;
> +
> struct ec_params_lightbar {
> uint8_t cmd; /* Command (see enum lightbar_command) */
> union {
> struct {
> /* no args */
> - } dump, off, on, init, get_seq, get_params, version;
> + } dump, off, on, init, get_seq, get_params_v0, get_params_v1,
> + version, get_brightness, get_demo;
>
> - struct num {
> + struct {
> uint8_t num;
> - } brightness, seq, demo;
> + } set_brightness, seq, demo;
>
> - struct reg {
> + struct {
> uint8_t ctrl, reg, value;
> } reg;
>
> - struct rgb {
> + struct {
> uint8_t led, red, green, blue;
> - } rgb;
> + } set_rgb;
> +
> + struct {
> + uint8_t led;
> + } get_rgb;
>
> - struct lightbar_params set_params;
> + struct lightbar_params_v0 set_params_v0;
> + struct lightbar_params_v1 set_params_v1;
> };
> } __packed;
>
> struct ec_response_lightbar {
> union {
> - struct dump {
> + struct {
> struct {
> uint8_t reg;
> uint8_t ic0;
> @@ -1033,20 +1082,26 @@ struct ec_response_lightbar {
> } vals[23];
> } dump;
>
> - struct get_seq {
> + struct {
> uint8_t num;
> - } get_seq;
> + } get_seq, get_brightness, get_demo;
>
> - struct lightbar_params get_params;
> + struct lightbar_params_v0 get_params_v0;
> + struct lightbar_params_v1 get_params_v1;
>
> - struct version {
> + struct {
> uint32_t num;
> uint32_t flags;
> } version;
>
> struct {
> + uint8_t red, green, blue;
> + } get_rgb;
> +
> + struct {
> /* no return params */
> - } off, on, init, brightness, seq, reg, rgb, demo, set_params;
> + } off, on, init, set_brightness, seq, reg, set_rgb,
> + demo, set_params_v0, set_params_v1;
> };
> } __packed;
>
> @@ -1056,15 +1111,20 @@ enum lightbar_command {
> LIGHTBAR_CMD_OFF = 1,
> LIGHTBAR_CMD_ON = 2,
> LIGHTBAR_CMD_INIT = 3,
> - LIGHTBAR_CMD_BRIGHTNESS = 4,
> + LIGHTBAR_CMD_SET_BRIGHTNESS = 4,
> LIGHTBAR_CMD_SEQ = 5,
> LIGHTBAR_CMD_REG = 6,
> - LIGHTBAR_CMD_RGB = 7,
> + LIGHTBAR_CMD_SET_RGB = 7,
> LIGHTBAR_CMD_GET_SEQ = 8,
> LIGHTBAR_CMD_DEMO = 9,
> - LIGHTBAR_CMD_GET_PARAMS = 10,
> - LIGHTBAR_CMD_SET_PARAMS = 11,
> + LIGHTBAR_CMD_GET_PARAMS_V0 = 10,
> + LIGHTBAR_CMD_SET_PARAMS_V0 = 11,
> LIGHTBAR_CMD_VERSION = 12,
> + LIGHTBAR_CMD_GET_BRIGHTNESS = 13,
> + LIGHTBAR_CMD_GET_RGB = 14,
> + LIGHTBAR_CMD_GET_DEMO = 15,
> + LIGHTBAR_CMD_GET_PARAMS_V1 = 16,
> + LIGHTBAR_CMD_SET_PARAMS_V1 = 17,
> LIGHTBAR_NUM_CMDS
> };
>
> @@ -1421,8 +1481,40 @@ struct ec_response_rtc {
> /*****************************************************************************/
> /* Port80 log access */
>
> +/* Maximum entries that can be read/written in a single command */
> +#define EC_PORT80_SIZE_MAX 32
> +
> /* Get last port80 code from previous boot */
> #define EC_CMD_PORT80_LAST_BOOT 0x48
> +#define EC_CMD_PORT80_READ 0x48
> +
> +enum ec_port80_subcmd {
> + EC_PORT80_GET_INFO = 0,
> + EC_PORT80_READ_BUFFER,
> +};
> +
> +struct ec_params_port80_read {
> + uint16_t subcmd;
> + union {
> + struct {
> + uint32_t offset;
> + uint32_t num_entries;
> + } read_buffer;
> + };
> +} __packed;
> +
> +struct ec_response_port80_read {
> + union {
> + struct {
> + uint32_t writes;
> + uint32_t history_size;
> + uint32_t last_boot;
> + } get_info;
> + struct {
> + uint16_t codes[EC_PORT80_SIZE_MAX];
> + } data;
> + };
> +} __packed;
>
> struct ec_response_port80_last_boot {
> uint16_t code;
> @@ -1782,6 +1874,7 @@ struct ec_params_gpio_set {
> /* Get GPIO value */
> #define EC_CMD_GPIO_GET 0x93
>
> +/* Version 0 of input params and response */
> struct ec_params_gpio_get {
> char name[32];
> } __packed;
> @@ -1789,6 +1882,38 @@ struct ec_response_gpio_get {
> uint8_t val;
> } __packed;
>
> +/* Version 1 of input params and response */
> +struct ec_params_gpio_get_v1 {
> + uint8_t subcmd;
> + union {
> + struct {
> + char name[32];
> + } get_value_by_name;
> + struct {
> + uint8_t index;
> + } get_info;
> + };
> +} __packed;
> +
> +struct ec_response_gpio_get_v1 {
> + union {
> + struct {
> + uint8_t val;
> + } get_value_by_name, get_count;
> + struct {
> + uint8_t val;
> + char name[32];
> + uint32_t flags;
> + } get_info;
> + };
> +} __packed;
> +
> +enum gpio_get_subcmd {
> + EC_GPIO_GET_BY_NAME = 0,
> + EC_GPIO_GET_COUNT = 1,
> + EC_GPIO_GET_INFO = 2,
> +};
> +
> /*****************************************************************************/
> /* I2C commands. Only available when flash write protect is unlocked. */
>
> @@ -1857,13 +1982,21 @@ struct ec_params_charge_control {
> /*****************************************************************************/
>
> /*
> - * Cut off battery power output if the battery supports.
> + * Cut off battery power immediately or after the host has shut down.
> *
> - * For unsupported battery, just don't implement this command and lets EC
> - * return EC_RES_INVALID_COMMAND.
> + * return EC_RES_INVALID_COMMAND if unsupported by a board/battery.
> + * EC_RES_SUCCESS if the command was successful.
> + * EC_RES_ERROR if the cut off command failed.
> */
> +
> #define EC_CMD_BATTERY_CUT_OFF 0x99
>
> +#define EC_BATTERY_CUTOFF_FLAG_AT_SHUTDOWN (1 << 0)
> +
> +struct ec_params_battery_cutoff {
> + uint8_t flags;
> +} __packed;
> +
> /*****************************************************************************/
> /* USB port mux control. */
>
> @@ -2142,6 +2275,32 @@ struct ec_params_sb_wr_block {
> } __packed;
>
> /*****************************************************************************/
> +/* Battery vendor parameters
> + *
> + * Get or set vendor-specific parameters in the battery. Implementations may
> + * differ between boards or batteries. On a set operation, the response
> + * contains the actual value set, which may be rounded or clipped from the
> + * requested value.
> + */
> +
> +#define EC_CMD_BATTERY_VENDOR_PARAM 0xb4
> +
> +enum ec_battery_vendor_param_mode {
> + BATTERY_VENDOR_PARAM_MODE_GET = 0,
> + BATTERY_VENDOR_PARAM_MODE_SET,
> +};
> +
> +struct ec_params_battery_vendor_param {
> + uint32_t param;
> + uint32_t value;
> + uint8_t mode;
> +} __packed;
> +
> +struct ec_response_battery_vendor_param {
> + uint32_t value;
> +} __packed;
> +
> +/*****************************************************************************/
> /* System commands */
>
> /*
> @@ -2338,6 +2497,80 @@ struct ec_params_reboot_ec {
>
> /*****************************************************************************/
> /*
> + * PD commands
> + *
> + * These commands are for PD MCU communication.
> + */
> +
> +/* EC to PD MCU exchange status command */
> +#define EC_CMD_PD_EXCHANGE_STATUS 0x100
> +
> +/* Status of EC being sent to PD */
> +struct ec_params_pd_status {
> + int8_t batt_soc; /* battery state of charge */
> +} __packed;
> +
> +/* Status of PD being sent back to EC */
> +struct ec_response_pd_status {
> + int8_t status; /* PD MCU status */
> + uint32_t curr_lim_ma; /* input current limit */
> +} __packed;
> +
> +/* Set USB type-C port role and muxes */
> +#define EC_CMD_USB_PD_CONTROL 0x101
> +
> +enum usb_pd_control_role {
> + USB_PD_CTRL_ROLE_NO_CHANGE = 0,
> + USB_PD_CTRL_ROLE_TOGGLE_ON = 1, /* == AUTO */
> + USB_PD_CTRL_ROLE_TOGGLE_OFF = 2,
> + USB_PD_CTRL_ROLE_FORCE_SINK = 3,
> + USB_PD_CTRL_ROLE_FORCE_SOURCE = 4,
> +};
> +
> +enum usb_pd_control_mux {
> + USB_PD_CTRL_MUX_NO_CHANGE = 0,
> + USB_PD_CTRL_MUX_NONE = 1,
> + USB_PD_CTRL_MUX_USB = 2,
> + USB_PD_CTRL_MUX_DP = 3,
> + USB_PD_CTRL_MUX_DOCK = 4,
> + USB_PD_CTRL_MUX_AUTO = 5,
> +};
> +
> +struct ec_params_usb_pd_control {
> + uint8_t port;
> + uint8_t role;
> + uint8_t mux;
> +} __packed;
> +
> +/*****************************************************************************/
> +/*
> + * Passthru commands
> + *
> + * Some platforms have sub-processors chained to each other. For example.
> + *
> + * AP <--> EC <--> PD MCU
> + *
> + * The top 2 bits of the command number are used to indicate which device the
> + * command is intended for. Device 0 is always the device receiving the
> + * command; other device mapping is board-specific.
> + *
> + * When a device receives a command to be passed to a sub-processor, it passes
> + * it on with the device number set back to 0. This allows the sub-processor
> + * to remain blissfully unaware of whether the command originated on the next
> + * device up the chain, or was passed through from the AP.
> + *
> + * In the above example, if the AP wants to send command 0x0002 to the PD MCU,
> + * AP sends command 0x4002 to the EC
> + * EC sends command 0x0002 to the PD MCU
> + * EC forwards PD MCU response back to the AP
> + */
> +
> +/* Offset and max command number for sub-device n */
> +#define EC_CMD_PASSTHRU_OFFSET(n) (0x4000 * (n))
> +#define EC_CMD_PASSTHRU_MAX(n) (EC_CMD_PASSTHRU_OFFSET(n) + 0x3fff)
> +
> +/*****************************************************************************/
> +/*
> * Deprecated constants. These constants have been renamed for clarity. The
> * meaning and size has not changed. Programs that use the old names should
> * switch to the new names soon, as the old names may not be carried forward
> --
> 2.1.4
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists