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dae19428a6
Signed-off-by: Vic Yang <victoryang@chromium.org> BUG=none TEST='ectool i2cread' succeed. Change-Id: I0639c340b600ff5e07b9c0aa707fe335e90771b5 Reviewed-on: https://gerrit.chromium.org/gerrit/27599 Reviewed-by: Rong Chang <rongchang@chromium.org> Commit-Ready: Vic Yang <victoryang@chromium.org> Tested-by: Vic Yang <victoryang@chromium.org>
57 lines
1.4 KiB
C
57 lines
1.4 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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/* I2C host commands for Chrome EC */
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#include "host_command.h"
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#include "i2c.h"
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#include "system.h"
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int i2c_command_read(struct host_cmd_handler_args *args)
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{
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const struct ec_params_i2c_read *p =
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(const struct ec_params_i2c_read *)args->params;
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struct ec_response_i2c_read *r =
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(struct ec_response_i2c_read *)args->response;
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int data, rv = -1;
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if (system_is_locked())
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return EC_RES_ACCESS_DENIED;
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if (p->read_size == 16)
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rv = i2c_read16(p->port, p->addr, p->offset, &data);
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else if (p->read_size == 8)
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rv = i2c_read8(p->port, p->addr, p->offset, &data);
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if (rv)
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return EC_RES_ERROR;
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r->data = data;
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args->response_size = sizeof(*r);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_I2C_READ, i2c_command_read, EC_VER_MASK(0));
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int i2c_command_write(struct host_cmd_handler_args *args)
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{
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const struct ec_params_i2c_write *p =
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(const struct ec_params_i2c_write *)args->params;
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int rv = -1;
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if (system_is_locked())
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return EC_RES_ACCESS_DENIED;
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if (p->write_size == 16)
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rv = i2c_write16(p->port, p->addr, p->offset, p->data);
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else if (p->write_size == 8)
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rv = i2c_write8(p->port, p->addr, p->offset, p->data);
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if (rv)
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return EC_RES_ERROR;
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_I2C_WRITE, i2c_command_write, EC_VER_MASK(0));
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