+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Chromium OS cros_ec driver
*
* Copyright (c) 2012 The Chromium OS Authors.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _CROS_EC_H
#include <linux/compiler.h>
#include <ec_commands.h>
-#include <fdtdec.h>
#include <cros_ec_message.h>
#include <asm/gpio.h>
-
-#ifndef CONFIG_DM_CROS_EC
-/* 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 */
- CROS_EC_IF_SANDBOX,
-};
-#endif
+#include <dm/of_extra.h>
/* Our configuration information */
struct cros_ec_dev {
-#ifdef CONFIG_DM_CROS_EC
struct udevice *dev; /* Transport device */
-#else
- 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 */
-#endif
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 */
* @param dev CROS-EC device
* @param id Place to put the ID
* @param maxlen Maximum length of the ID field
- * @return 0 if ok, -1 on error
+ * 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
*
* @param dev CROS-EC device
* @param scan Place to put the scan results
- * @return 0 if ok, -1 on error
+ * Return: 0 if ok, -1 on error
+ */
+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_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan);
+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.
*
* @param dev CROS-EC device
* @param image Destination for image identifier
- * @return 0 if ok, <0 on error
+ * 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
+ * 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.
* @param dev CROS-EC device
* @param cmd Reboot command
* @param flags Flags for reboot command (EC_REBOOT_FLAG_*)
- * @return 0 if ok, <0 on error
+ * 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.
* If no external interrupt is configured, this always returns 1.
*
* @param dev CROS-EC device
- * @return 0 if no interrupt is pending
+ * 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,
*
* @param blob Device tree blob containing setup information
* @param cros_ecp Returns pointer to the cros_ec device, or NULL if none
- * @return 0 if we got an cros_ec device and all is well (or no cros_ec is
+ * Return: 0 if we got an cros_ec device and all is well (or no cros_ec is
* 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
* @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_mkbp_info *info);
+int cros_ec_info(struct udevice *dev, struct ec_response_mkbp_info *info);
/**
* Read the host event flags
*
* @param dev CROS-EC device
* @param events_ptr Destination for event flags. Not changed on error.
- * @return 0 if ok, <0 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
*
* @param dev CROS-EC device
* @param events Event flags to clear
- * @return 0 if ok, <0 on error
+ * 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
* @param set_flags New flag values; only bits in set_mask are applied;
* ignored if set_mask=0.
* @param prot Destination for updated protection state from EC.
- * @return 0 if ok, <0 on error
+ * 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);
/**
* Run internal tests on the cros_ec interface.
*
* @param dev CROS-EC device
- * @return 0 if ok, <0 if the test failed
+ * 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.
* @param dev CROS-EC device
* @param image the content to write
* @param imafge_size content length
- * @return 0 if ok, <0 if the test failed
+ * 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
+ * Return: pointer to CROS-EC device, or NULL if none is available
*/
-struct cros_ec_dev *board_get_cros_ec_dev(void);
-
-#ifdef CONFIG_DM_CROS_EC
+struct udevice *board_get_cros_ec_dev(void);
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);
+
+ /**
+ * 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);
+
+ /**
+ * 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);
+
+ /**
+ * 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);
};
#define dm_cros_ec_get_ops(dev) \
int cros_ec_register(struct udevice *dev);
-#else /* !CONFIG_DM_CROS_EC */
-
-/* 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);
-int cros_ec_sandbox_init(struct cros_ec_dev *dev, const void *blob);
-
-/**
- * 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);
-
-/**
- * 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);
-
-/**
- * Read information from the fdt for the sandbox 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_sandbox_decode_fdt(struct cros_ec_dev *dev, const void *blob);
-
-/**
- * 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->protocol_version accordingly.
- *
- * @param dev CROS-EC device to check
- */
-int cros_ec_lpc_check_version(struct cros_ec_dev *dev);
-
-/**
- * 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);
-
-/**
- * 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);
-
-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);
-
-/**
- * Send a packet to a CROS-EC device and return the response packet.
- *
- * Expects the request packet to be stored in dev->dout. Stores the response
- * packet in dev->din.
- *
- * @param dev CROS-EC device
- * @param out_bytes Size of request packet to output
- * @param in_bytes Maximum size of response packet to receive
- * @return number of bytes in response packet, or <0 on error
- */
-int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes);
-int cros_ec_sandbox_packet(struct cros_ec_dev *dev, int out_bytes,
- int in_bytes);
-#endif
-
/**
* Dump a block of data for a command.
*
*
* @param data Data block to checksum
* @param size Size of data block in bytes
- * @return checksum value (0 to 255)
+ * Return: checksum value (0 to 255)
*/
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
* @param data Pointer to data buffer to read into
* @param offset Offset within flash to read from
* @param size Number of bytes to read
- * @return 0 if ok, -1 on error
+ * Return: 0 if ok, -1 on error
+ */
+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_flash_read(struct cros_ec_dev *dev, uint8_t *data, uint32_t offset,
- uint32_t size);
+int cros_ec_read_flashinfo(struct udevice *dev,
+ struct ec_response_flash_info *info);
/**
* Write data to the flash
* @param data Pointer to data buffer to write
* @param offset Offset within flash to write to.
* @param size Number of bytes to write
- * @return 0 if ok, -1 on error
+ * 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
* @param region Flash region to query
* @param offset Returns offset of flash region in EC flash
* @param size Returns size of flash region
- * @return 0 if ok, -1 on error
+ * Return: 0 if ok, -1 on error
+ */
+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_flash_offset(struct cros_ec_dev *dev, enum ec_flash_region region,
- uint32_t *offset, uint32_t *size);
+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
+ * 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
*
* @param dev CROS-EC device
* @param versionp This is set to point to the version information
- * @return 0 if ok, -1 on error
+ * 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
*
* @param dev CROS-EC device
* @param versionp This is set to point to the build string
- * @return 0 if ok, -1 on error
+ * 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.
* @param dev CROS-EC device
* @param index index of the LDO/FET to switch
* @param state new state of the LDO/FET : EC_LDO_STATE_ON|OFF
- * @return 0 if ok, -1 on error
+ * 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.
* @param dev CROS-EC device
* @param index index of the LDO/FET to switch
* @param state current state of the LDO/FET : EC_LDO_STATE_ON|OFF
- * @return 0 if ok, -1 on error
+ * Return: 0 if ok, -1 on error
*/
-int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state);
-
-/**
- * Initialize the Chrome OS EC at board initialization time.
- *
- * @return 0 if ok, -ve on error
- */
-int cros_ec_board_init(void);
+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)
+ * 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 blob FDT blob to use
- * @param node Node offset to read from
+ * @param dev Device to read from
* @param config Structure to use to return information
*/
-int cros_ec_decode_ec_flash(const void *blob, int node,
- struct fdt_cros_ec *config);
+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.
*
* @param ec CROS-EC device
*/
-void cros_ec_check_keyboard(struct cros_ec_dev *dev);
+void cros_ec_check_keyboard(struct udevice *dev);
+struct i2c_msg;
/*
* Tunnel an I2C transfer to the EC
*
* @param dev CROS-EC device
- * @param chip Chip address (7-bit I2C address)
- * @param addr Register address to read/write
- * @param alen Length of register address in bytes
- * @param buffer Buffer containing data to read/write
- * @param len Length of buffer
- * @param is_read 1 if this is a read, 0 if this is a write
- */
-int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr,
- int alen, uchar *buffer, int len, int is_read);
+ * @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);
+
+/**
+ * cros_ec_read_batt_charge() - Read the battery-charge state
+ *
+ * @dev: CROS-EC device
+ * @chargep: Return battery-charge state as a percentage
+ * Return: 0 if OK, -ve on error
+ */
+int cros_ec_read_batt_charge(struct udevice *dev, uint *chargep);
#endif
projects / platform / kernel / u-boot.git / blobdiff