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/*
* File : spi_dev.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
*/
#include <rtthread.h>
#include <drivers/spi.h>
/* SPI bus device interface, compatible with RT-Thread 0.3.x/1.0.x */
static rt_size_t _spi_bus_device_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
struct rt_spi_bus *bus;
bus = (struct rt_spi_bus *)dev;
RT_ASSERT(bus != RT_NULL);
RT_ASSERT(bus->owner != RT_NULL);
return rt_spi_transfer(bus->owner, RT_NULL, buffer, size);
}
static rt_size_t _spi_bus_device_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
struct rt_spi_bus *bus;
bus = (struct rt_spi_bus *)dev;
RT_ASSERT(bus != RT_NULL);
RT_ASSERT(bus->owner != RT_NULL);
return rt_spi_transfer(bus->owner, buffer, RT_NULL, size);
}
static rt_err_t _spi_bus_device_control(rt_device_t dev,
rt_uint8_t cmd,
void *args)
{
/* TODO: add control command handle */
switch (cmd)
{
case 0: /* set device */
break;
case 1:
break;
}
return RT_EOK;
}
rt_err_t rt_spi_bus_device_init(struct rt_spi_bus *bus, const char *name)
{
struct rt_device *device;
RT_ASSERT(bus != RT_NULL);
device = &bus->parent;
/* set device type */
device->type = RT_Device_Class_SPIBUS;
/* initialize device interface */
device->init = RT_NULL;
device->open = RT_NULL;
device->close = RT_NULL;
device->read = _spi_bus_device_read;
device->write = _spi_bus_device_write;
device->control = _spi_bus_device_control;
/* register to device manager */
return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
}
/* SPI Dev device interface, compatible with RT-Thread 0.3.x/1.0.x */
static rt_size_t _spidev_device_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
struct rt_spi_device *device;
device = (struct rt_spi_device *)dev;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
return rt_spi_transfer(device, RT_NULL, buffer, size);
}
static rt_size_t _spidev_device_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
struct rt_spi_device *device;
device = (struct rt_spi_device *)dev;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
return rt_spi_transfer(device, buffer, RT_NULL, size);
}
static rt_err_t _spidev_device_control(rt_device_t dev,
rt_uint8_t cmd,
void *args)
{
switch (cmd)
{
case 0: /* set device */
break;
case 1:
break;
}
return RT_EOK;
}
rt_err_t rt_spidev_device_init(struct rt_spi_device *dev, const char *name)
{
struct rt_device *device;
RT_ASSERT(dev != RT_NULL);
device = &(dev->parent);
/* set device type */
device->type = RT_Device_Class_SPIDevice;
device->init = RT_NULL;
device->open = RT_NULL;
device->close = RT_NULL;
device->read = _spidev_device_read;
device->write = _spidev_device_write;
device->control = _spidev_device_control;
/* register to device manager */
return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
}
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