Archipelago » qemu

#define SETUP_STATE_IDLE  0

#define SETUP_STATE_SETUP 1

#define SETUP_STATE_DATA  2

#define SETUP_STATE_ACK   3

        if (ret == USB_RET_ASYNC) {

             s->setup_state = SETUP_STATE_SETUP;

             return USB_RET_ASYNC;

        }

/* ctrl complete function for devices which use usb_generic_handle_packet and

   may return USB_RET_ASYNC from their handle_control callback. Device code

   which does this *must* call this function instead of the normal

   usb_packet_complete to complete their async control packets. */

void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)

{

    if (p->len < 0) {

        s->setup_state = SETUP_STATE_IDLE;

    }

    switch (s->setup_state) {

    case SETUP_STATE_SETUP:

        if (p->len < s->setup_len) {

            s->setup_len = p->len;

        }

        s->setup_state = SETUP_STATE_DATA;

        p->len = 8;

        break;

    case SETUP_STATE_ACK:

        s->setup_state = SETUP_STATE_IDLE;

        p->len = 0;

        break;

    default:

        break;

    }

    usb_packet_complete(s, p);

}