include/usb/request.h

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#ifndef USB_BUFFER_H_INCLUDED
#define USB_BUFFER_H_INCLUDED

#include <bitops.h>
#include <buffer.h>
#include <types.h>

struct udc;

enum usb_request_flag {
        USB_REQ_SHORT_PKT,
};

struct usb_request {
        struct slist            buf_list;
        struct slist_node       node;
        unsigned long           flags;
        void (*req_done)(struct udc *udc, struct usb_request *req);
        void                    *context;
        int                     status;
        size_t                  bytes_xfered;
};

extern void usb_req_init(struct usb_request *req);

static inline void usb_req_add_buffer(struct usb_request *req,
                struct buffer *buf)
{
        slist_insert_tail(&req->buf_list, &buf->node);
}

extern struct usb_request *usb_req_alloc(void);
extern void usb_req_free(struct usb_request *req);
extern void usb_init(void);

extern struct usb_request *usb_req_alloc_single_tx(
                const void *data, size_t len);
extern struct usb_request *usb_req_alloc_single_rx(void *data, size_t len);
extern void usb_req_free_all(struct usb_request *req);

static inline struct buffer *usb_req_get_first_buffer(
                struct usb_request *req)
{
        return slist_peek_head(&req->buf_list, struct buffer, node);
}

#define usb_req_for_each_buffer(req, buf)                       \
        slist_for_each(&req->buf_list, buf, node)

#define usb_req_for_each_buffer_safe(req, buf, next)            \
        slist_for_each_safe(&req->buf_list, buf, next, node)

#endif /* USB_BUFFER_H_INCLUDED */

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