mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-09-21 19:15:44 +08:00
Michal Lenc
7f98bd8469
More i2c drivers from cpukit to bsps/shared to allow them use BSP infrastructure if needed. The framework code i2c-bus.c and i2c-dev.c kept at its original location. Signed-off-by: Michal Lenc <michallenc@seznam.cz>
105 lines
2.8 KiB
C
105 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( i2c_dev *dev, uint8_t *val )
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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( i2c_dev *dev, uint8_t val )
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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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