X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fcros_ec.h;h=9396b4d246619cfb0cd56df6081ce9c05606d227;hb=66e3c64f2c6bec4739d1d618b3583d5c92f10176;hp=335d5b4e639dfaae75a842a7724981e31d635efe;hpb=88364387c60dc72549ccf7f2d595cbf847ab4e17;p=platform%2Fkernel%2Fu-boot.git diff --git a/include/cros_ec.h b/include/cros_ec.h index 335d5b4..9396b4d 100644 --- a/include/cros_ec.h +++ b/include/cros_ec.h @@ -1,24 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * Chromium OS cros_ec driver * * Copyright (c) 2012 The Chromium OS Authors. - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA */ #ifndef _CROS_EC_H @@ -26,29 +10,15 @@ #include #include -#include #include - -/* Which interface is the device on? */ -enum cros_ec_interface_t { - CROS_EC_IF_NONE, - CROS_EC_IF_SPI, - CROS_EC_IF_I2C, - CROS_EC_IF_LPC, /* Intel Low Pin Count interface */ -}; +#include +#include /* Our configuration information */ struct cros_ec_dev { - enum cros_ec_interface_t interface; - struct spi_slave *spi; /* Our SPI slave, if using SPI */ - int node; /* Our node */ - int parent_node; /* Our parent node (interface) */ - unsigned int cs; /* Our chip select */ - unsigned int addr; /* Device address (for I2C) */ - unsigned int bus_num; /* Bus number (for I2C) */ - unsigned int max_frequency; /* Maximum interface frequency */ - struct fdt_gpio_state ec_int; /* GPIO used as EC interrupt line */ - int cmd_version_is_supported; /* Device supports command versions */ + struct udevice *dev; /* Transport device */ + struct gpio_desc ec_int; /* GPIO used as EC interrupt line */ + int protocol_version; /* Protocol version to use */ int optimise_flash_write; /* Don't write erased flash blocks */ /* @@ -78,6 +48,17 @@ struct mbkp_keyscan { uint8_t data[CROS_EC_KEYSCAN_COLS]; }; +/* Holds information about the Chrome EC */ +struct fdt_cros_ec { + struct fmap_entry flash; /* Address and size of EC flash */ + /* + * Byte value of erased flash, or -1 if not known. It is normally + * 0xff but some flash devices use 0 (e.g. STM32Lxxx) + */ + int flash_erase_value; + struct fmap_entry region[EC_FLASH_REGION_COUNT]; +}; + /** * Read the ID of the CROS-EC device * @@ -88,7 +69,7 @@ struct mbkp_keyscan { * @param maxlen Maximum length of the ID field * @return 0 if ok, -1 on error */ -int cros_ec_read_id(struct cros_ec_dev *dev, char *id, int maxlen); +int cros_ec_read_id(struct udevice *dev, char *id, int maxlen); /** * Read a keyboard scan from the CROS-EC device @@ -99,7 +80,18 @@ int cros_ec_read_id(struct cros_ec_dev *dev, char *id, int maxlen); * @param scan Place to put the scan results * @return 0 if ok, -1 on error */ -int cros_ec_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan); +int cros_ec_scan_keyboard(struct udevice *dev, struct mbkp_keyscan *scan); + +/** + * Get the next pending MKBP event from the ChromeOS EC device. + * + * Send a message requesting the next event and return the result. + * + * @param event Place to put the event. + * @return 0 if ok, <0 on error. + */ +int cros_ec_get_next_event(struct udevice *dev, + struct ec_response_get_next_event *event); /** * Read which image is currently running on the CROS-EC device. @@ -108,18 +100,19 @@ int cros_ec_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan); * @param image Destination for image identifier * @return 0 if ok, <0 on error */ -int cros_ec_read_current_image(struct cros_ec_dev *dev, - enum ec_current_image *image); +int cros_ec_read_current_image(struct udevice *dev, + enum ec_current_image *image); /** * Read the hash of the CROS-EC device firmware. * * @param dev CROS-EC device + * @param hash_offset Offset in flash to read from * @param hash Destination for hash information * @return 0 if ok, <0 on error */ -int cros_ec_read_hash(struct cros_ec_dev *dev, - struct ec_response_vboot_hash *hash); +int cros_ec_read_hash(struct udevice *dev, uint hash_offset, + struct ec_response_vboot_hash *hash); /** * Send a reboot command to the CROS-EC device. @@ -131,8 +124,7 @@ int cros_ec_read_hash(struct cros_ec_dev *dev, * @param flags Flags for reboot command (EC_REBOOT_FLAG_*) * @return 0 if ok, <0 on error */ -int cros_ec_reboot(struct cros_ec_dev *dev, enum ec_reboot_cmd cmd, - uint8_t flags); +int cros_ec_reboot(struct udevice *dev, enum ec_reboot_cmd cmd, uint8_t flags); /** * Check if the CROS-EC device has an interrupt pending. @@ -143,7 +135,7 @@ int cros_ec_reboot(struct cros_ec_dev *dev, enum ec_reboot_cmd cmd, * @param dev CROS-EC device * @return 0 if no interrupt is pending */ -int cros_ec_interrupt_pending(struct cros_ec_dev *dev); +int cros_ec_interrupt_pending(struct udevice *dev); enum { CROS_EC_OK, @@ -155,7 +147,7 @@ enum { }; /** - * Set up the Chromium OS matrix keyboard protocol + * Initialise the Chromium OS EC driver * * @param blob Device tree blob containing setup information * @param cros_ecp Returns pointer to the cros_ec device, or NULL if none @@ -163,7 +155,7 @@ enum { * expected), -ve if we should have an cros_ec device but failed to find * one, or init failed (-CROS_EC_ERR_...). */ -int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp); +int cros_ec_init(const void *blob, struct udevice**cros_ecp); /** * Read information about the keyboard matrix @@ -171,8 +163,7 @@ int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp); * @param dev CROS-EC device * @param info Place to put the info structure */ -int cros_ec_info(struct cros_ec_dev *dev, - struct ec_response_cros_ec_info *info); +int cros_ec_info(struct udevice *dev, struct ec_response_mkbp_info *info); /** * Read the host event flags @@ -181,7 +172,7 @@ int cros_ec_info(struct cros_ec_dev *dev, * @param events_ptr Destination for event flags. Not changed on error. * @return 0 if ok, <0 on error */ -int cros_ec_get_host_events(struct cros_ec_dev *dev, uint32_t *events_ptr); +int cros_ec_get_host_events(struct udevice *dev, uint32_t *events_ptr); /** * Clear the specified host event flags @@ -190,7 +181,7 @@ int cros_ec_get_host_events(struct cros_ec_dev *dev, uint32_t *events_ptr); * @param events Event flags to clear * @return 0 if ok, <0 on error */ -int cros_ec_clear_host_events(struct cros_ec_dev *dev, uint32_t events); +int cros_ec_clear_host_events(struct udevice *dev, uint32_t events); /** * Get/set flash protection @@ -203,10 +194,18 @@ int cros_ec_clear_host_events(struct cros_ec_dev *dev, uint32_t events); * @param prot Destination for updated protection state from EC. * @return 0 if ok, <0 on error */ -int cros_ec_flash_protect(struct cros_ec_dev *dev, - uint32_t set_mask, uint32_t set_flags, - struct ec_response_flash_protect *resp); +int cros_ec_flash_protect(struct udevice *dev, uint32_t set_mask, + uint32_t set_flags, + struct ec_response_flash_protect *resp); +/** + * Notify EC of current boot mode + * + * @param dev CROS-EC device + * @param vboot_mode Verified boot mode + * @return 0 if ok, <0 on error + */ +int cros_ec_entering_mode(struct udevice *dev, int mode); /** * Run internal tests on the cros_ec interface. @@ -214,7 +213,7 @@ int cros_ec_flash_protect(struct cros_ec_dev *dev, * @param dev CROS-EC device * @return 0 if ok, <0 if the test failed */ -int cros_ec_test(struct cros_ec_dev *dev); +int cros_ec_test(struct udevice *dev); /** * Update the EC RW copy. @@ -224,97 +223,78 @@ int cros_ec_test(struct cros_ec_dev *dev); * @param imafge_size content length * @return 0 if ok, <0 if the test failed */ -int cros_ec_flash_update_rw(struct cros_ec_dev *dev, - const uint8_t *image, int image_size); +int cros_ec_flash_update_rw(struct udevice *dev, const uint8_t *image, + int image_size); /** * Return a pointer to the board's CROS-EC device * - * This should be implemented by board files. - * * @return pointer to CROS-EC device, or NULL if none is available */ -struct cros_ec_dev *board_get_cros_ec_dev(void); - - -/* Internal interfaces */ -int cros_ec_i2c_init(struct cros_ec_dev *dev, const void *blob); -int cros_ec_spi_init(struct cros_ec_dev *dev, const void *blob); -int cros_ec_lpc_init(struct cros_ec_dev *dev, const void *blob); +struct udevice *board_get_cros_ec_dev(void); -/** - * Read information from the fdt for the i2c cros_ec interface - * - * @param dev CROS-EC device - * @param blob Device tree blob - * @return 0 if ok, -1 if we failed to read all required information - */ -int cros_ec_i2c_decode_fdt(struct cros_ec_dev *dev, const void *blob); +struct dm_cros_ec_ops { + /** + * check_version() - Check the protocol version being used (optional) + * + * If provided, this function should check that the EC can be supported + * by the driver. If not provided, HELLO messages will be sent to try + * to determine the protocol version. + * + * @dev: Device to check + * @return 0 if the protocol is valid, -ve if not supported + */ + int (*check_version)(struct udevice *dev); -/** - * Read information from the fdt for the spi cros_ec interface - * - * @param dev CROS-EC device - * @param blob Device tree blob - * @return 0 if ok, -1 if we failed to read all required information - */ -int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob); + /** + * command() - Old-style command interface + * + * This sends a command and receives a response (deprecated, use + * packet()) + * + * @dev: Device to use + * @cmd: Command to send (only supports 0-0xff) + * @cmd_version: Version of command to send (often 0) + * @dout: Output data (may be NULL If dout_len=0) + * @dout_len: Length of output data excluding 4-byte header + * @dinp: On input, set to point to input data, often struct + * cros_ec_dev->din - typically this is left alone but may be + * updated by the driver + * @din_len: Maximum length of response + * @return number of bytes in response, or -ve on error + */ + int (*command)(struct udevice *dev, uint8_t cmd, int cmd_version, + const uint8_t *dout, int dout_len, + uint8_t **dinp, int din_len); -/** - * Check whether the LPC interface supports new-style commands. - * - * LPC has its own way of doing this, which involves checking LPC values - * visible to the host. Do this, and update dev->cmd_version_is_supported - * accordingly. - * - * @param dev CROS-EC device to check - */ -int cros_ec_lpc_check_version(struct cros_ec_dev *dev); + /** + * packet() - New-style command interface + * + * This interface is preferred over command(), since it is typically + * easier to implement. + * + * @dev: Device to use + * @out_bytes: Number of bytes to send (from struct cros_ec_dev->dout) + * @in_bytes: Maximum number of bytes to expect in response + * @return number of bytes in response, or -ve on error + */ + int (*packet)(struct udevice *dev, int out_bytes, int in_bytes); -/** - * Send a command to an I2C CROS-EC device and return the reply. - * - * This rather complicated function deals with sending both old-style and - * new-style commands. The old ones have just a command byte and arguments. - * The new ones have version, command, arg-len, [args], chksum so are 3 bytes - * longer. - * - * The device's internal input/output buffers are used. - * - * @param dev CROS-EC device - * @param cmd Command to send (EC_CMD_...) - * @param cmd_version Version of command to send (EC_VER_...) - * @param dout Output data (may be NULL If dout_len=0) - * @param dout_len Size of output data in bytes - * @param dinp Returns pointer to response data - * @param din_len Maximum size of response in bytes - * @return number of bytes in response, or -1 on error - */ -int cros_ec_i2c_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, - const uint8_t *dout, int dout_len, - uint8_t **dinp, int din_len); + /** + * get_switches() - Get value of EC switches + * + * This is currently supported on the LPC EC. + * + * @dev: Device to use + * @return current switches value, or -ENOSYS if not supported + */ + int (*get_switches)(struct udevice *dev); +}; -/** - * Send a command to a LPC CROS-EC device and return the reply. - * - * The device's internal input/output buffers are used. - * - * @param dev CROS-EC device - * @param cmd Command to send (EC_CMD_...) - * @param cmd_version Version of command to send (EC_VER_...) - * @param dout Output data (may be NULL If dout_len=0) - * @param dout_len Size of output data in bytes - * @param dinp Returns pointer to response data - * @param din_len Maximum size of response in bytes - * @return number of bytes in response, or -1 on error - */ -int cros_ec_lpc_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, - const uint8_t *dout, int dout_len, - uint8_t **dinp, int din_len); +#define dm_cros_ec_get_ops(dev) \ + ((struct dm_cros_ec_ops *)(dev)->driver->ops) -int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, - const uint8_t *dout, int dout_len, - uint8_t **dinp, int din_len); +int cros_ec_register(struct udevice *dev); /** * Dump a block of data for a command. @@ -335,17 +315,7 @@ void cros_ec_dump_data(const char *name, int cmd, const uint8_t *data, int len); */ int cros_ec_calc_checksum(const uint8_t *data, int size); -/** - * Decode a flash region parameter - * - * @param argc Number of params remaining - * @param argv List of remaining parameters - * @return flash region (EC_FLASH_REGION_...) or -1 on error - */ -int cros_ec_decode_region(int argc, char * const argv[]); - -int cros_ec_flash_erase(struct cros_ec_dev *dev, uint32_t offset, - uint32_t size); +int cros_ec_flash_erase(struct udevice *dev, uint32_t offset, uint32_t size); /** * Read data from the flash @@ -362,8 +332,19 @@ int cros_ec_flash_erase(struct cros_ec_dev *dev, uint32_t offset, * @param size Number of bytes to read * @return 0 if ok, -1 on error */ -int cros_ec_flash_read(struct cros_ec_dev *dev, uint8_t *data, uint32_t offset, - uint32_t size); +int cros_ec_flash_read(struct udevice *dev, uint8_t *data, uint32_t offset, + uint32_t size); + +/** + * Read back flash parameters + * + * This function reads back parameters of the flash as reported by the EC + * + * @param dev Pointer to device + * @param info Pointer to output flash info struct + */ +int cros_ec_read_flashinfo(struct udevice *dev, + struct ec_response_flash_info *info); /** * Write data to the flash @@ -383,8 +364,8 @@ int cros_ec_flash_read(struct cros_ec_dev *dev, uint8_t *data, uint32_t offset, * @param size Number of bytes to write * @return 0 if ok, -1 on error */ -int cros_ec_flash_write(struct cros_ec_dev *dev, const uint8_t *data, - uint32_t offset, uint32_t size); +int cros_ec_flash_write(struct udevice *dev, const uint8_t *data, + uint32_t offset, uint32_t size); /** * Obtain position and size of a flash region @@ -395,18 +376,26 @@ int cros_ec_flash_write(struct cros_ec_dev *dev, const uint8_t *data, * @param size Returns size of flash region * @return 0 if ok, -1 on error */ -int cros_ec_flash_offset(struct cros_ec_dev *dev, enum ec_flash_region region, - uint32_t *offset, uint32_t *size); +int cros_ec_flash_offset(struct udevice *dev, enum ec_flash_region region, + uint32_t *offset, uint32_t *size); + +/** + * cros_ec_get_sku_id() - Read the SKU ID + * + * @dev: CROS-EC device + * return SKU ID, or -ve on error + */ +int cros_ec_get_sku_id(struct udevice *dev); /** - * Read/write VbNvContext from/to a CROS-EC device. + * Read/write non-volatile data from/to a CROS-EC device. * * @param dev CROS-EC device * @param block Buffer of VbNvContext to be read/write * @return 0 if ok, -1 on error */ -int cros_ec_read_vbnvcontext(struct cros_ec_dev *dev, uint8_t *block); -int cros_ec_write_vbnvcontext(struct cros_ec_dev *dev, const uint8_t *block); +int cros_ec_read_nvdata(struct udevice *dev, uint8_t *block, int size); +int cros_ec_write_nvdata(struct udevice *dev, const uint8_t *block, int size); /** * Read the version information for the EC images @@ -415,8 +404,8 @@ int cros_ec_write_vbnvcontext(struct cros_ec_dev *dev, const uint8_t *block); * @param versionp This is set to point to the version information * @return 0 if ok, -1 on error */ -int cros_ec_read_version(struct cros_ec_dev *dev, - struct ec_response_get_version **versionp); +int cros_ec_read_version(struct udevice *dev, + struct ec_response_get_version **versionp); /** * Read the build information for the EC @@ -425,7 +414,7 @@ int cros_ec_read_version(struct cros_ec_dev *dev, * @param versionp This is set to point to the build string * @return 0 if ok, -1 on error */ -int cros_ec_read_build_info(struct cros_ec_dev *dev, char **strp); +int cros_ec_read_build_info(struct udevice *dev, char **strp); /** * Switch on/off a LDO / FET. @@ -435,7 +424,7 @@ int cros_ec_read_build_info(struct cros_ec_dev *dev, char **strp); * @param state new state of the LDO/FET : EC_LDO_STATE_ON|OFF * @return 0 if ok, -1 on error */ -int cros_ec_set_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t state); +int cros_ec_set_ldo(struct udevice *dev, uint8_t index, uint8_t state); /** * Read back a LDO / FET current state. @@ -445,5 +434,222 @@ int cros_ec_set_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t state); * @param state current state of the LDO/FET : EC_LDO_STATE_ON|OFF * @return 0 if ok, -1 on error */ -int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state); +int cros_ec_get_ldo(struct udevice *dev, uint8_t index, uint8_t *state); + +/** + * Get access to the error reported when cros_ec_board_init() was called + * + * This permits delayed reporting of the EC error if it failed during + * early init. + * + * @return error (0 if there was no error, -ve if there was an error) + */ +int cros_ec_get_error(void); + +/** + * Returns information from the FDT about the Chrome EC flash + * + * @param dev Device to read from + * @param config Structure to use to return information + */ +int cros_ec_decode_ec_flash(struct udevice *dev, struct fdt_cros_ec *config); + +/** + * Check the current keyboard state, in case recovery mode is requested. + * This function is for sandbox only. + * + * @param ec CROS-EC device + */ +void cros_ec_check_keyboard(struct udevice *dev); + +struct i2c_msg; +/* + * Tunnel an I2C transfer to the EC + * + * @param dev CROS-EC device + * @param port The remote port on EC to use + * @param msg List of messages to transfer + * @param nmsgs Number of messages to transfer + */ +int cros_ec_i2c_tunnel(struct udevice *dev, int port, struct i2c_msg *msg, + int nmsgs); + +/** + * cros_ec_get_events_b() - Get event mask B + * + * @return value of event mask, default value of 0 if it could not be read + */ +uint64_t cros_ec_get_events_b(struct udevice *dev); + +/** + * cros_ec_clear_events_b() - Clear even mask B + * + * Any pending events in the B range are cleared + * + * @return 0 if OK, -ve on error + */ +int cros_ec_clear_events_b(struct udevice *dev, uint64_t mask); + +/** + * cros_ec_efs_verify() - tell the EC to verify one of its images + * + * @param dev CROS-EC device + * @param region Flash region to query + * @return 0 if OK, -ve on error + */ +int cros_ec_efs_verify(struct udevice *dev, enum ec_flash_region region); + +/** + * cros_ec_battery_cutoff() - Request that the battery be cut off + * + * This tells the battery to stop supplying power. This is used before shipping + * a device to ensure that the battery remains charged while the device is + * shipped or sitting on the shelf waiting to be purchased. + * + * @param dev CROS-EC device + * @param flags Flags to use (EC_BATTERY_CUTOFF_FLAG_...) + * @return 0 if OK, -ve on error + */ +int cros_ec_battery_cutoff(struct udevice *dev, uint8_t flags); + +/** + * cros_ec_set_pwm_duty() - Set duty cycle of a generic pwm + * + * Note that duty value needs to be passed to the EC as a 16 bit number + * for increased precision. + * + * @param dev CROS-EC device + * @param index Index of the pwm + * @param duty Desired duty cycle, in 0..EC_PWM_MAX_DUTY range. + * @return 0 if OK, -ve on error + */ +int cros_ec_set_pwm_duty(struct udevice *dev, uint8_t index, uint16_t duty); + +/** + * cros_ec_read_limit_power() - Check if power is limited by batter/charger + * + * Sometimes the battery is low and / or the device is connected to a charger + * that cannot supply much power. + * + * @param dev CROS-EC device + * @param limit_powerp Returns whether power is limited (0 or 1) + * @return 0 if OK, -ENOSYS if the EC does not support this comment, -EINVAL + * if the EC returned an invalid response + */ +int cros_ec_read_limit_power(struct udevice *dev, int *limit_powerp); + +/** + * cros_ec_config_powerbtn() - Configure the behaviour of the power button + * + * @param dev CROS-EC device + * @param flags Flags to use (EC_POWER_BUTTON_...) + * @return 0 if OK, -ve on error + */ +int cros_ec_config_powerbtn(struct udevice *dev, uint32_t flags); + +/** + * cros_ec_get_lid_shutdown_mask() - Set the lid shutdown mask + * + * Determines whether a lid close event is reported + * + * @param dev CROS-EC device + * @return shufdown mas if OK, -ve on error + */ +int cros_ec_get_lid_shutdown_mask(struct udevice *dev); + +/** + * cros_ec_set_lid_shutdown_mask() - Set the lid shutdown mask + * + * Set whether a lid close event is reported + * + * @param dev CROS-EC device + * @param enable true to enable reporting, false to disable + * @return shufdown mas if OK, -ve on error + */ +int cros_ec_set_lid_shutdown_mask(struct udevice *dev, int enable); + +/** + * cros_ec_hello() - Send a hello message + * + * Sends a message with a fixed input value and checks that the expected output + * value is received + * + * @dev: CROS-EC device + * @handshakep: If non-NULL, returns received handshake value on error + * @return 0 if OK, -ve on error + */ +int cros_ec_hello(struct udevice *dev, uint *handshakep); + +/** + * cros_ec_get_features() - Get the set of features provided by the EC + * + * See enum ec_feature_code for the list of available features + * + * @dev: CROS-EC device + * @featuresp: Returns a bitmask of supported features + * @return 0 if OK, -ve on error + */ +int cros_ec_get_features(struct udevice *dev, u64 *featuresp); + +/** + * cros_ec_check_feature() - Check if a feature is supported + * + * @dev: CROS-EC device + * @feature: Feature number to check (enum ec_feature_code) + * @return true if supported, false if not, -ve on error + */ +int cros_ec_check_feature(struct udevice *dev, uint feature); + +/** + * cros_ec_get_switches() - Get switches value + * + * @dev: CROS-EC device + * @return switches value, or -ENOSYS if not supported, or other -ve value on + * other error + */ +int cros_ec_get_switches(struct udevice *dev); + +/** + * cros_ec_vstore_supported() - Check if vstore is supported + * + * @dev: CROS-EC device + * @return false if not supported, true if supported, -ve on error + */ +int cros_ec_vstore_supported(struct udevice *dev); + +/** + * cros_ec_vstore_info() - Get vstore information + * + * @dev: CROS-EC device + * @lockedp: mask of locked slots + * @return number of vstore slots supported by the EC,, -ve on error + */ +int cros_ec_vstore_info(struct udevice *dev, u32 *lockedp); + +/** + * cros_ec_vstore_read() - Read data from EC vstore slot + * + * @dev: CROS-EC device + * @slot: vstore slot to read from + * @data: buffer to store read data, must be EC_VSTORE_SLOT_SIZE bytes + * @return 0 if OK, -ve on error + */ +int cros_ec_vstore_read(struct udevice *dev, int slot, uint8_t *data); + +/** + * cros_ec_vstore_write() - Save data into EC vstore slot + * + * The maximum size of data is EC_VSTORE_SLOT_SIZE. It is the caller's + * responsibility to check the number of implemented slots by querying the + * vstore info. + * + * @dev: CROS-EC device + * @slot: vstore slot to write into + * @data: data to write + * @size: size of data in bytes + * @return 0 if OK, -ve on error + */ +int cros_ec_vstore_write(struct udevice *dev, int slot, const uint8_t *data, + size_t size); + #endif