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/*
* 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 <stddef.h>
#include <stdint.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);
#ifndef __PRE_RAM__
int google_chromeec_i2c_xfer(uint8_t chip, uint8_t addr, int alen,
uint8_t *buffer, int len, int is_read);
u32 google_chromeec_get_wake_mask(void);
int google_chromeec_set_sci_mask(u32 mask);
int google_chromeec_set_smi_mask(u32 mask);
int google_chromeec_set_wake_mask(u32 mask);
u8 google_chromeec_get_event(void);
int google_ec_running_ro(void);
void google_chromeec_init(void);
#endif
#ifdef __PRE_RAM__
/* If recovery mode is enabled and EC is not running RO firmware reboot. */
void google_chromeec_early_init(void);
void google_chromeec_early_pd_init(void);
/* Reboot if EC firmware is not expected type. */
void google_chromeec_check_ec_image(int expected_type);
void google_chromeec_check_pd_image(int expected_type);
#endif
int google_chromeec_check_feature(int feature);
uint8_t google_chromeec_calc_checksum(const uint8_t *data, int size);
u16 google_chromeec_get_board_version(void);
u32 google_chromeec_get_events_b(void);
int google_chromeec_clear_events_b(u32 mask);
int google_chromeec_kbbacklight(int percent);
void google_chromeec_post(u8 postcode);
void google_chromeec_log_events(u32 mask);
int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len);
uint8_t google_chromeec_get_switches(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);
/* 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)
void mec_io_bytes(int write, u16 offset, unsigned int length,
u8 *buf, u8 *csum);
enum usb_charge_mode {
USB_CHARGE_MODE_DISABLED,
USB_CHARGE_MODE_CHARGE_AUTO,
USB_CHARGE_MODE_CHARGE_BC12,
USB_CHARGE_MODE_DOWNSTREAM_500MA,
USB_CHARGE_MODE_DOWNSTREAM_1500MA,
};
int google_chromeec_set_usb_charge_mode(u8 port_id, enum usb_charge_mode mode);
/* 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);
int google_chromeec_command(struct chromeec_command *cec_command);
#endif /* _EC_GOOGLE_CHROMEEC_EC_H */
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