rtdevice.h

/*
 * File      : rtdevice.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2012-01-08     bernard      first version.
 */

#ifndef __RT_DEVICE_H__
#define __RT_DEVICE_H__

#include <rtthread.h>

#define RT_DEVICE(device)            ((rt_device_t)device)

/* completion flag */
struct rt_completion
{
    rt_uint32_t flag;

    /* suspended list */
    rt_list_t suspended_list;
};

#define RT_RINGBUFFER_SIZE(rb)       ((rb)->write_index - (rb)->read_index)
#define RT_RINGBUFFER_EMPTY(rb)      ((rb)->buffer_size - RT_RINGBUFFER_SIZE(rb))
/* ring buffer */
struct rt_ringbuffer
{
    rt_uint16_t read_index, write_index;
    rt_uint8_t *buffer_ptr;
    rt_uint16_t buffer_size;
};

/* pipe device */
#define PIPE_DEVICE(device)          ((struct rt_pipe_device*)(device))
struct rt_pipe_device
{
    struct rt_device parent;

    /* ring buffer in pipe device */
    struct rt_ringbuffer ringbuffer;

    /* suspended list */
    rt_list_t suspended_read_list;
    rt_list_t suspended_write_list;
};

#define RT_DATAQUEUE_EVENT_UNKNOWN   0x00
#define RT_DATAQUEUE_EVENT_POP       0x01
#define RT_DATAQUEUE_EVENT_PUSH      0x02
#define RT_DATAQUEUE_EVENT_LWM       0x03

struct rt_data_item;
#define RT_DATAQUEUE_SIZE(dq)        ((dq)->put_index - (dq)->get_index)
#define RT_DATAQUEUE_EMPTY(dq)       ((dq)->size - RT_DATAQUEUE_SIZE(dq))
/* data queue implementation */
struct rt_data_queue
{
    rt_uint16_t size;
    rt_uint16_t lwm;
    rt_bool_t   waiting_lwm;

    rt_uint16_t get_index;
    rt_uint16_t put_index;

    struct rt_data_item *queue;

    rt_list_t suspended_push_list;
    rt_list_t suspended_pop_list;

    /* event notify */
    void (*evt_notify)(struct rt_data_queue *queue, rt_uint32_t event);
};

/**
 * Completion
 */
void rt_completion_init(struct rt_completion *completion);
rt_err_t rt_completion_wait(struct rt_completion *completion,
                            rt_int32_t            timeout);
void rt_completion_done(struct rt_completion *completion);

/**
 * RingBuffer for DeviceDriver
 *
 * Please note that the ring buffer implementation of RT-Thread
 * has no thread wait or resume feature.
 */
void rt_ringbuffer_init(struct rt_ringbuffer *rb,
                        rt_uint8_t           *pool,
                        rt_uint16_t           size);
rt_size_t rt_ringbuffer_put(struct rt_ringbuffer *rb,
                            const rt_uint8_t     *ptr,
                            rt_uint16_t           length);
rt_size_t rt_ringbuffer_putchar(struct rt_ringbuffer *rb,
                                const rt_uint8_t      ch);
rt_size_t rt_ringbuffer_get(struct rt_ringbuffer *rb,
                            rt_uint8_t           *ptr,
                            rt_uint16_t           length);
rt_size_t rt_ringbuffer_getchar(struct rt_ringbuffer *rb, rt_uint8_t *ch);
rt_inline rt_uint16_t rt_ringbuffer_get_size(struct rt_ringbuffer *rb)
{
    RT_ASSERT(rb != RT_NULL);
    return rb->buffer_size;
}

/**
 * Pipe Device
 */
rt_err_t rt_pipe_create(const char *name, rt_size_t size);
void rt_pipe_destroy(struct rt_pipe_device *pipe);

/**
 * DataQueue for DeviceDriver
 */
rt_err_t rt_data_queue_init(struct rt_data_queue *queue,
                            rt_uint16_t           size,
                            rt_uint16_t           lwm,
                            void (*evt_notify)(struct rt_data_queue *queue, rt_uint32_t event));
rt_err_t rt_data_queue_push(struct rt_data_queue *queue,
                            void                 *data_ptr,
                            rt_size_t             data_size,
                            rt_int32_t            timeout);
rt_err_t rt_data_queue_pop(struct rt_data_queue *queue,
                           void                **data_ptr,
                           rt_size_t            *size,
                           rt_int32_t            timeout);
rt_err_t rt_data_queue_peak(struct rt_data_queue *queue,
                            void                **data_ptr,
                            rt_size_t            *size);
void rt_data_queue_reset(struct rt_data_queue *queue);

#ifdef RT_USING_RTC
#include "drivers/rtc.h"
#endif /* RT_USING_RTC */

#ifdef RT_USING_SPI
#include "drivers/spi.h"
#endif /* RT_USING_SPI */

#ifdef RT_USING_MTD_NOR
#include "drivers/mtd_nor.h"
#endif /* RT_USING_MTD_NOR */

#ifdef RT_USING_MTD_NAND
#include "drivers/mtd_nand.h"
#endif /* RT_USING_MTD_NAND */

#ifdef RT_USING_USB_DEVICE
#include "drivers/usb_device.h"
#endif /* RT_USING_USB_DEVICE */

#ifdef RT_USING_USB_HOST
#include "drivers/usb_host.h"
#endif /* RT_USING_USB_HOST */

#ifdef RT_USING_SERIAL
#include "drivers/serial.h"
#endif /* RT_USING_SERIAL */

#ifdef RT_USING_I2C
#include "drivers/i2c.h"
#include "drivers/i2c_dev.h"

#ifdef RT_USING_I2C_BITOPS
#include "drivers/i2c-bit-ops.h"
#endif /* RT_USING_I2C_BITOPS */
#endif /* RT_USING_I2C */

#ifdef RT_USING_SDIO
#include "drivers/mmcsd_core.h"
#include "drivers/sd.h"
#include "drivers/sdio.h"
#endif

#endif /* __RT_DEVICE_H__ */