mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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07ca0977fe
Added version mask field to DECLARE_HOST_COMMAND() because it's convenient to do so when I'm touching all host command implementations, but all commands simply declare version 0 and nothing checks it yet. Will add version support in a followup CL. This change is internal to the EC; it does not change the data sent over the host interface. BUG=chrome-os-partner:11275 TEST=manual ectool version && ectool echash; should get sane data from both ectool flashread 0x80 0x40 /tmp/foo && od -tx1 /tmp/foo should match data from offset 0x80 of ec.bin (od -j128 -n64 -tx1 ec.bin) Change-Id: I5699f72b8d5e1ac23929353c9a34158d76c44206 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/27172 Reviewed-by: Bill Richardson <wfrichar@chromium.org>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Host command module for Chrome EC */
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#ifndef __CROS_EC_HOST_COMMAND_H
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#define __CROS_EC_HOST_COMMAND_H
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#include "common.h"
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#include "ec_commands.h"
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/* Args for host command handler */
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struct host_cmd_handler_args {
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uint8_t command; /* Command (e.g., EC_CMD_FLASH_GET_INFO) */
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uint8_t version; /* Version of command (0-31) */
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const uint8_t *params; /* Input parameters */
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uint8_t params_size; /* Size of input parameters in bytes */
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/*
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* Pointer to output response data buffer. On input to the handler,
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* points to a EC_PARAM_SIZE-byte buffer. Command handler can change
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* this to point to a different location instead of memcpy()'ing data
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* into the provided buffer.
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*/
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uint8_t *response;
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uint8_t response_size; /* Size of data pointed to by resp_ptr */
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};
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/* Host command */
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struct host_command {
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/* Command code */
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int command;
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/*
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* Handler for the command. Args points to context for handler.
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* Returns result status (EC_RES_*).
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*/
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int (*handler)(struct host_cmd_handler_args *args);
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/* Mask of supported versions */
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int version_mask;
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};
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/**
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* Return a pointer to the memory-mapped buffer.
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*
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* This buffer is EC_MEMMAP_SIZE bytes long, is writable at any time, and the
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* host can read it at any time.
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*
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* @param offset Offset within the range to return
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* @return pointer to the buffer at that offset
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*/
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uint8_t *host_get_memmap(int offset);
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/**
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* Process a host command and return its response
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*
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* @param command The command code
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* @param data Buffer holding the command, and used for the
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* response payload.
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* @param response_size Returns the size of the response
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* @return resulting status
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*/
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enum ec_status host_command_process(int command, uint8_t *data,
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int *response_size);
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/**
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* Set one or more host event bits.
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*
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* @param mask Event bits to set (use EC_HOST_EVENT_MASK()).
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*/
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void host_set_events(uint32_t mask);
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/**
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* Set a single host event.
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*
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* @param event Event to set (EC_HOST_EVENT_*).
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*/
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static inline void host_set_single_event(int event)
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{
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host_set_events(EC_HOST_EVENT_MASK(event));
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}
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/**
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* Clear one or more host event bits.
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*
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* @param mask Event bits to clear (use EC_HOST_EVENT_MASK()).
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* Write 1 to a bit to clear it.
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*/
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void host_clear_events(uint32_t mask);
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/**
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* Return the raw SCI/SMI event state.
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*/
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uint32_t host_get_events(void);
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/**
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* Called by host interface module when a command is received.
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*/
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void host_command_received(int command);
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/**
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* Send a successful result code along with response data to a host command.
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*
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* @param result Result code for the command (EC_RES_...)
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* @param data Buffer with the response payload.
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* @param size Size of the response buffer.
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*/
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void host_send_response(enum ec_status result, const uint8_t *data, int size);
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/* Return a pointer to the host command data buffer. This buffer must
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* only be accessed between a notification to host_command_received()
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* and a subsequent call to lpc_SendHostResponse(). */
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uint8_t *host_get_buffer(void);
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/* Register a host command handler */
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#define DECLARE_HOST_COMMAND(command, routine, version_mask) \
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const struct host_command __host_cmd_##command \
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__attribute__((section(".rodata.hcmds"))) \
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= {command, routine, version_mask}
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#endif /* __CROS_EC_HOST_COMMAND_H */
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