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Rather than go through the task queue, host_command_process() processes the command immediately, has all of its required state passed in, allowing the caller complete control of the buffers. BUG=chrome-os-partner:10533 TEST=manual: build and boot on link, see that messages are stil processed build and boot on snow, which uses this new command See that the SPI keyboard works now Change-Id: Ib7587de10c42caf01bc95bb4d515fd0afc3da7d8 Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/25983 Reviewed-by: David Hendricks <dhendrix@chromium.org>
65 lines
2.3 KiB
C
65 lines
2.3 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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/* 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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/* Handler for the command; data points to parameters/response.
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* returns negative error code if case of failure (using EC_LPC_STATUS
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* codes). sets <response_size> if it returns a payload to the host. */
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int (*handler)(uint8_t *data, int *response_size);
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};
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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 slot is 0 for kernel-originated commands,
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* 1 for usermode-originated commands.
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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 slot, int command, uint8_t *data,
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int *response_size);
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/* Called by LPC module when a command is written to one of the
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command slots (0=kernel, 1=user). */
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void host_command_received(int slot, int command);
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// success results with response data
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/* Send a successful result code along with response data to a host command.
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* <slot> is 0 for kernel-originated commands,
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* 1 for usermode-originated commands.
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* <result> is the result code for the command (EC_RES_...)
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* <data> is the buffer with the response payload.
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* <size> is the size of the response buffer. */
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void host_send_response(int slot, enum ec_status result, const uint8_t *data,
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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(). <slot> is 0 for
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* kernel-originated commands, 1 for usermode-originated commands. */
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uint8_t *host_get_buffer(int slot);
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/* Register a host command handler */
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#define DECLARE_HOST_COMMAND(command, routine) \
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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}
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#endif /* __CROS_EC_HOST_COMMAND_H */
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