mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
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Gedare Bloom
8e6ded473c
This is an update of many lingering embedded brains GmbH licenses from the RTEMS License to the 2-BSD license where possible depending on the joint copyrights. Updates #3053.
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/**
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* @file
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*
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* @brief Switch NXP PCA9548A Driver Implementation
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*
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* @ingroup I2CSWITCHNXPPCA9548A
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*/
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/*
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* Copyright (C) 2014 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <dev/i2c/switch-nxp-pca9548a.h>
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static int switch_nxp_pca9548a_do_get_control(
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i2c_dev *dev,
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uint8_t *val
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)
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{
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i2c_msg msg = {
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.addr = dev->address,
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.flags = I2C_M_RD,
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.len = (uint16_t) sizeof(*val),
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.buf = val
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};
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return i2c_bus_transfer(dev->bus, &msg, 1);
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}
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static int switch_nxp_pca9548a_do_set_control(
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i2c_dev *dev,
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uint8_t val
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)
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{
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i2c_msg msg = {
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.addr = dev->address,
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.flags = 0,
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.len = (uint16_t) sizeof(val),
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.buf = &val
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};
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return i2c_bus_transfer(dev->bus, &msg, 1);
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}
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static int switch_nxp_pca9548a_ioctl(
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i2c_dev *dev,
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ioctl_command_t command,
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void *arg
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)
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{
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uint8_t v8 = (uint8_t)(uintptr_t) arg;
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int err;
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switch (command) {
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case SWITCH_NXP_PCA9548A_GET_CONTROL:
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err = switch_nxp_pca9548a_do_get_control(dev, arg);
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break;
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case SWITCH_NXP_PCA9548A_SET_CONTROL:
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err = switch_nxp_pca9548a_do_set_control(dev, v8);
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break;
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default:
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err = -ENOTTY;
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break;
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}
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return err;
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}
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int i2c_dev_register_switch_nxp_pca9548a(
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const char *bus_path,
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const char *dev_path,
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uint16_t address
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)
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{
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i2c_dev *dev;
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dev = i2c_dev_alloc_and_init(sizeof(*dev), bus_path, address);
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if (dev == NULL) {
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return -1;
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}
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dev->ioctl = switch_nxp_pca9548a_ioctl;
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return i2c_dev_register(dev, dev_path);
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}
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