+/* 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>
-
-/* 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 <asm/gpio.h>
+#include <dm/of_extra.h>
/* 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 */
/*
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
*
* @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
* @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);
/**
* Read which image is currently running on the CROS-EC device.
* @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.
* @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.
* @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,
};
/**
- * 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
* 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_cros_ec_info *info);
+int cros_ec_info(struct udevice *dev, struct ec_response_mkbp_info *info);
/**
* Read the host event flags
* @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
* @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
* @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.
* @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.
* @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);
-
-/**
- * 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);
-
-/**
- * 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);
-
-/**
- * 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);
+struct dm_cros_ec_ops {
+ int (*check_version)(struct udevice *dev);
+ int (*command)(struct udevice *dev, uint8_t cmd, int cmd_version,
+ const uint8_t *dout, int dout_len,
+ uint8_t **dinp, int din_len);
+ int (*packet)(struct udevice *dev, int out_bytes, int in_bytes);
+};
-/**
- * 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.
*/
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 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
* @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
* @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);
/**
- * 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
* @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
* @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.
* @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.
* @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_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);
+
#endif
projects / oweals / u-boot.git / blobdiff