156 lines
4.6 KiB
C
156 lines
4.6 KiB
C
/*
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* File : spi_dev.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include <rtthread.h>
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#include <drivers/spi.h>
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/* SPI bus device interface, compatible with RT-Thread 0.3.x/1.0.x */
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static rt_size_t _spi_bus_device_read(rt_device_t dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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struct rt_spi_bus *bus;
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bus = (struct rt_spi_bus *)dev;
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RT_ASSERT(bus != RT_NULL);
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RT_ASSERT(bus->owner != RT_NULL);
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return rt_spi_transfer(bus->owner, RT_NULL, buffer, size);
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}
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static rt_size_t _spi_bus_device_write(rt_device_t dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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struct rt_spi_bus *bus;
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bus = (struct rt_spi_bus *)dev;
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RT_ASSERT(bus != RT_NULL);
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RT_ASSERT(bus->owner != RT_NULL);
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return rt_spi_transfer(bus->owner, buffer, RT_NULL, size);
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}
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static rt_err_t _spi_bus_device_control(rt_device_t dev,
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int cmd,
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void *args)
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{
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/* TODO: add control command handle */
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switch (cmd)
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{
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case 0: /* set device */
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break;
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case 1:
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break;
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}
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return RT_EOK;
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}
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rt_err_t rt_spi_bus_device_init(struct rt_spi_bus *bus, const char *name)
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{
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struct rt_device *device;
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RT_ASSERT(bus != RT_NULL);
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device = &bus->parent;
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/* set device type */
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device->type = RT_Device_Class_SPIBUS;
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/* initialize device interface */
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device->init = RT_NULL;
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device->open = RT_NULL;
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device->close = RT_NULL;
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device->read = _spi_bus_device_read;
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device->write = _spi_bus_device_write;
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device->control = _spi_bus_device_control;
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/* register to device manager */
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return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
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}
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/* SPI Dev device interface, compatible with RT-Thread 0.3.x/1.0.x */
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static rt_size_t _spidev_device_read(rt_device_t dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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struct rt_spi_device *device;
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device = (struct rt_spi_device *)dev;
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(device->bus != RT_NULL);
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return rt_spi_transfer(device, RT_NULL, buffer, size);
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}
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static rt_size_t _spidev_device_write(rt_device_t dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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struct rt_spi_device *device;
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device = (struct rt_spi_device *)dev;
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RT_ASSERT(device != RT_NULL);
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RT_ASSERT(device->bus != RT_NULL);
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return rt_spi_transfer(device, buffer, RT_NULL, size);
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}
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static rt_err_t _spidev_device_control(rt_device_t dev,
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int cmd,
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void *args)
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{
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switch (cmd)
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{
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case 0: /* set device */
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break;
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case 1:
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break;
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}
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return RT_EOK;
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}
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rt_err_t rt_spidev_device_init(struct rt_spi_device *dev, const char *name)
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{
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struct rt_device *device;
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RT_ASSERT(dev != RT_NULL);
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device = &(dev->parent);
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/* set device type */
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device->type = RT_Device_Class_SPIDevice;
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device->init = RT_NULL;
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device->open = RT_NULL;
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device->close = RT_NULL;
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device->read = _spidev_device_read;
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device->write = _spidev_device_write;
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device->control = _spidev_device_control;
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/* register to device manager */
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return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
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}
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