| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 The Chromium OS Authors. All rights reserved. |
| * |
| * 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; version 2 of the License. |
| * |
| * 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. |
| * |
| * Mailbox EC communication interface for Google Chrome Embedded Controller. |
| */ |
| |
| #ifndef _EC_GOOGLE_CHROMEEC_EC_H |
| #define _EC_GOOGLE_CHROMEEC_EC_H |
| #include <types.h> |
| #include "ec_commands.h" |
| |
| /* Fill in base and size of the IO port resources used. */ |
| void google_chromeec_ioport_range(uint16_t *base, size_t *size); |
| |
| int google_chromeec_i2c_xfer(uint8_t chip, uint8_t addr, int alen, |
| uint8_t *buffer, int len, int is_read); |
| uint64_t google_chromeec_get_wake_mask(void); |
| int google_chromeec_set_sci_mask(uint64_t mask); |
| int google_chromeec_set_smi_mask(uint64_t mask); |
| int google_chromeec_set_wake_mask(uint64_t mask); |
| uint8_t google_chromeec_get_event(void); |
| |
| /* Check if EC supports feature EC_FEATURE_UNIFIED_WAKE_MASKS */ |
| bool google_chromeec_is_uhepi_supported(void); |
| int google_ec_running_ro(void); |
| enum ec_current_image google_chromeec_get_current_image(void); |
| void google_chromeec_init(void); |
| int google_chromeec_pd_get_amode(uint16_t svid); |
| int google_chromeec_wait_for_displayport(long timeout); |
| |
| /* Device events */ |
| uint64_t google_chromeec_get_device_enabled_events(void); |
| int google_chromeec_set_device_enabled_events(uint64_t mask); |
| uint64_t google_chromeec_get_device_current_events(void); |
| |
| int google_chromeec_check_feature(int feature); |
| uint8_t google_chromeec_calc_checksum(const uint8_t *data, int size); |
| |
| /** |
| * google_chromeec_get_board_version() - Get the board version |
| * @version: Out parameter to retrieve the board Version |
| * |
| * Return: 0 on success or -1 on failure/error. |
| * |
| * This function is used to get the board version information from EC. |
| */ |
| int google_chromeec_get_board_version(uint32_t *version); |
| uint32_t google_chromeec_get_sku_id(void); |
| int google_chromeec_set_sku_id(uint32_t skuid); |
| uint64_t google_chromeec_get_events_b(void); |
| int google_chromeec_clear_events_b(uint64_t mask); |
| int google_chromeec_kbbacklight(int percent); |
| void google_chromeec_post(uint8_t postcode); |
| int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len); |
| uint8_t google_chromeec_get_switches(void); |
| bool google_chromeec_get_ap_watchdog_flag(void); |
| |
| /* Temporary secure storage commands */ |
| int google_chromeec_vstore_supported(void); |
| int google_chromeec_vstore_info(uint32_t *locked); |
| int google_chromeec_vstore_read(int slot, uint8_t *data); |
| int google_chromeec_vstore_write(int slot, uint8_t *data, size_t size); |
| |
| /* Issue reboot command to EC with specified type and flags. Returns 0 on |
| success, < 0 otherwise. */ |
| int google_chromeec_reboot(int dev_idx, enum ec_reboot_cmd type, uint8_t flags); |
| |
| /** |
| * Get data from Cros Board Info |
| * |
| * @param id/fw_config/buf [OUT] value from from CBI. |
| * @return 0 on success or negative integer for errors. |
| */ |
| int google_chromeec_cbi_get_oem_id(uint32_t *id); |
| int google_chromeec_cbi_get_sku_id(uint32_t *id); |
| int google_chromeec_cbi_get_fw_config(uint32_t *fw_config); |
| int google_chromeec_cbi_get_dram_part_num(char *buf, size_t bufsize); |
| int google_chromeec_cbi_get_oem_name(char *buf, size_t bufsize); |
| |
| /* MEC uses 0x800/0x804 as register/index pair, thus an 8-byte resource. */ |
| #define MEC_EMI_BASE 0x800 |
| #define MEC_EMI_SIZE 8 |
| |
| /* For MEC, access ranges 0x800 thru 0x9ff using EMI interface instead of LPC */ |
| #define MEC_EMI_RANGE_START EC_HOST_CMD_REGION0 |
| #define MEC_EMI_RANGE_END (EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SIZE) |
| |
| int google_chromeec_set_usb_charge_mode(uint8_t port_id, enum usb_charge_mode mode); |
| int google_chromeec_set_usb_pd_role(uint8_t port, enum usb_pd_control_role role); |
| /* |
| * Retrieve the charger type and max wattage. |
| * |
| * @param type charger type |
| * @param max_watts charger max wattage |
| * @return non-zero for error, otherwise 0. |
| */ |
| int google_chromeec_get_usb_pd_power_info(enum usb_chg_type *type, |
| uint32_t *max_watts); |
| |
| /* |
| * Set max current and voltage of a dedicated charger. |
| * |
| * @param current_lim Max current in mA |
| * @param voltage_lim Max voltage in mV |
| * @return non-zero for error, otherwise 0. |
| */ |
| int google_chromeec_override_dedicated_charger_limit(uint16_t current_lim, |
| uint16_t voltage_lim); |
| |
| /* internal structure to send a command to the EC and wait for response. */ |
| struct chromeec_command { |
| uint16_t cmd_code; /* command code in, status out */ |
| uint8_t cmd_version; /* command version */ |
| const void* cmd_data_in; /* command data, if any */ |
| void* cmd_data_out; /* command response, if any */ |
| uint16_t cmd_size_in; /* size of command data */ |
| uint16_t cmd_size_out; /* expected size of command response in, |
| * actual received size out */ |
| int cmd_dev_index;/* device index for passthru */ |
| }; |
| |
| /* |
| * There are transport level constraints for sending protov3 packets. Because |
| * of this provide a way for the generic protocol layer to request buffers |
| * so that there is zero copying being done through the layers. |
| * |
| * Request the buffer provided the size. If 'req' is non-zero then the |
| * buffer requested is for EC requests. Otherwise it's for responses. Return |
| * non-NULL on success, NULL on error. |
| */ |
| void *crosec_get_buffer(size_t size, int req); |
| |
| /* |
| * The lower level transport works on the buffers handed out to the |
| * upper level. Therefore, only the size of the request and response |
| * are required. |
| */ |
| typedef int (*crosec_io_t)(size_t req_size, size_t resp_size, void *context); |
| int crosec_command_proto(struct chromeec_command *cec_command, |
| crosec_io_t crosec_io, void *context); |
| |
| /** |
| * Performs light verification of the EC<->AP communcation channel. |
| * |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_hello(void); |
| |
| /** |
| * Send a command to a CrOS EC |
| * |
| * @param cec_command: CrOS EC command to send |
| * @return 0 for success. Non-zero for error. |
| */ |
| int google_chromeec_command(struct chromeec_command *cec_command); |
| |
| struct google_chromeec_event_info { |
| uint64_t log_events; |
| uint64_t sci_events; |
| uint64_t smi_events; |
| uint64_t s3_wake_events; |
| uint64_t s3_device_events; |
| uint64_t s5_wake_events; |
| uint64_t s0ix_wake_events; |
| }; |
| void google_chromeec_events_init(const struct google_chromeec_event_info *info, |
| bool is_s3_wakeup); |
| |
| /* |
| * Get next available MKBP event in ec_response_get_next_event. Returns 0 on |
| * success, < 0 otherwise. |
| */ |
| int google_chromeec_get_mkbp_event(struct ec_response_get_next_event *event); |
| |
| /* Log host events to eventlog based on the mask provided. */ |
| void google_chromeec_log_events(uint64_t mask); |
| |
| /** |
| * Protect/un-protect EC flash regions. |
| * |
| * @param mask Set/clear the requested bits in 'flags' |
| * @param flags Flash protection flags |
| * @param resp Pointer to response structure |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_flash_protect(uint32_t mask, uint32_t flags, |
| struct ec_response_flash_protect *resp); |
| /** |
| * Calculate image hash for vboot. |
| * |
| * @param hash_type The hash types supported by the EC for vboot |
| * @param offset The offset to start hashing in flash |
| * @param resp Pointer to response structure |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_start_vboot_hash(enum ec_vboot_hash_type hash_type, |
| uint32_t offset, |
| struct ec_response_vboot_hash *resp); |
| /** |
| * Return the EC's vboot image hash. |
| * |
| * @param offset Get hash for flash region beginning here |
| * @param resp Pointer to response structure |
| * @return 0 on success, -1 on error |
| * |
| */ |
| int google_chromeec_get_vboot_hash(uint32_t offset, |
| struct ec_response_vboot_hash *resp); |
| |
| /** |
| * Get offset and size of the specified EC flash region. |
| * |
| * @param region Which region of EC flash |
| * @param offset Gets filled with region's offset |
| * @param size Gets filled with region's size |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_flash_region_info(enum ec_flash_region region, |
| uint32_t *offset, uint32_t *size); |
| /** |
| * Erase a region of EC flash. |
| * |
| * @param offset Where to begin erasing |
| * @param size Size of area to erase |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_flash_erase(uint32_t region_offset, uint32_t region_size); |
| |
| /** |
| * Return information about the entire flash. |
| * |
| * @param info Pointer to response structure |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_flash_info(struct ec_response_flash_info *info); |
| |
| /** |
| * Write a block into EC flash. |
| * |
| * @param data Pointer to data to write to flash, prefixed by a |
| * struct ec_params_flash_write |
| * @param offset Offset to begin writing data |
| * @param size Number of bytes to be written to flash from data |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_flash_write_block(const uint8_t *data, uint32_t size); |
| |
| /** |
| * Verify flash using EFS if available. |
| * |
| * @param region Which flash region to verify |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_efs_verify(enum ec_flash_region region); |
| |
| /** |
| * Command EC to perform battery cutoff. |
| * |
| * @param flags Flags to pass to the EC |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_battery_cutoff(uint8_t flags); |
| |
| /** |
| * Check if the EC is requesting the system to limit input power. |
| * |
| * @param limit_power If successful, limit_power is 1 if EC is requesting |
| * input power limits, otherwise 0. |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_read_limit_power_request(int *limit_power); |
| |
| /** |
| * Get information about the protocol that the EC speaks. |
| * |
| * @param resp Filled with host command protocol information. |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_get_protocol_info( |
| struct ec_response_get_protocol_info *resp); |
| |
| /** |
| * Get available versions of the specified command. |
| * |
| * @param command Command ID |
| * @param pmask Pointer to version mask |
| * @return 0 on success, -1 on error |
| */ |
| int google_chromeec_get_cmd_versions(int command, uint32_t *pmask); |
| |
| #endif /* _EC_GOOGLE_CHROMEEC_EC_H */ |