81 	/* This transfer is used for generic control endpoint transfers */
93 	/* This transfer is used for generic clear stall only */
108 	/* This transfer is used for generic control endpoint transfers */
119 	/* This transfer is used for generic clear stall only */
163  * can transfer multiple consecutive packets.
447  *	usbd_transfer_setup_sub - transfer setup subroutine
451  * transfer. This function will setup correct packet sizes, buffer
604 	/* check interrupt interval and transfer pre-delay */  in usbd_transfer_setup_sub()
818 	 * initial frame lengths when a USB transfer is complete. This  in usbd_transfer_setup_sub()
1141 			 * transfer when such a combination is not  in usbd_transfer_setup()
1190 			/* set transfer endpoint pointer */  in usbd_transfer_setup()
1193 			/* set transfer stream ID */  in usbd_transfer_setup()
1201 			 * Call the Host or Device controller transfer  in usbd_transfer_setup()
1238 				 * Transfer is successfully setup and  in usbd_transfer_setup()
1451 		 * HINT: when you start/stop a transfer, it might be a  in usbd_transfer_unsetup()
1508  * transfer any data. In USB Host Mode we already have the SETUP
1509  * packet at the moment the USB transfer is started. This leads us to
1510  * having to setup the USB transfer at two different places in
1511  * time. This function just contains factored out control transfer
1575 		/* the control transfer is no longer active */  in usbd_setup_ctrl_transfer()
1579 		/* don't stall control transfer by default */  in usbd_setup_ctrl_transfer()
1586 		 * If you need to split a control transfer, you  in usbd_setup_ctrl_transfer()
1598          * transfer in progress:  in usbd_setup_ctrl_transfer()
1606 			/* setup control transfer */  in usbd_setup_ctrl_transfer()
1633 				DPRINTF("Misconfigured transfer\n");  in usbd_setup_ctrl_transfer()
1648 		/* set transfer-header flag */  in usbd_setup_ctrl_transfer()
1670 	/* check if we are doing a short transfer */  in usbd_setup_ctrl_transfer()
1678 			DPRINTFN(0, "Short control transfer without "  in usbd_setup_ctrl_transfer()
1713  *	usbd_transfer_submit - start USB hardware for the given transfer
1744 	/* Only open the USB transfer once! */  in usbd_transfer_submit()
1762 	 * Check if the transfer is waiting on a queue, most  in usbd_transfer_submit()
1780 	/* by default we cannot cancel any USB transfer immediately */  in usbd_transfer_submit()
1814 			/* start the transfer */  in usbd_transfer_submit()
1830 		/* compute total transfer length */  in usbd_transfer_submit()
1846 	/* check if this is a control transfer */  in usbd_transfer_submit()
1857 	 * Setup filtered version of some transfer flags,  in usbd_transfer_submit()
1867 			/* check for control transfer */  in usbd_transfer_submit()
1892 		/* insert the USB transfer last in the BUS-DMA queue */  in usbd_transfer_submit()
1898 	 * Enter the USB transfer into the Host Controller or  in usbd_transfer_submit()
1920 	/* the transfer can now be cancelled */  in usbd_pipe_enter()
1923 	/* enter the transfer */  in usbd_pipe_enter()
1926 	/* check for transfer error */  in usbd_pipe_enter()
1934 	/* start the transfer */  in usbd_pipe_enter()
1940  *	usbd_transfer_start - start an USB transfer
1943  *       result in a single transfer start, until the USB transfer
1950 		/* transfer is gone */  in usbd_transfer_start()
1955 	/* mark the USB transfer started */  in usbd_transfer_start()
1963 	/* check if the USB transfer callback is already transferring */  in usbd_transfer_start()
1969 	/* call the USB transfer callback */  in usbd_transfer_start()
1975  *	usbd_transfer_stop - stop an USB transfer
1978  *       result in a single transfer stop.
1988 		/* transfer is gone */  in usbd_transfer_stop()
1993 	/* check if the USB transfer was ever opened */  in usbd_transfer_stop()
2005 	/* try to stop the current USB transfer */  in usbd_transfer_stop()
2019 	 * Check if we can cancel the USB transfer immediately.  in usbd_transfer_stop()
2053 		 * If the current USB transfer is completing we need  in usbd_transfer_stop()
2068  * This function will check if an USB transfer is pending which is a
2072  * 1: Pending: The USB transfer will receive a callback in the future.
2081 		/* transfer is gone */  in usbd_transfer_pending()
2112  * This function will stop the USB transfer and wait for any
2124 		/* transfer is gone */  in usbd_transfer_drain()
2138 		 * transfer mutex. In that case checking only  in usbd_transfer_drain()
2140 		 * the USB transfer is fully drained. We also need to  in usbd_transfer_drain()
2147 		 * transfer is complete !  in usbd_transfer_drain()
2233  * time the transfer was submitted. This function can be used to
2235  * when an isochronous transfer has completed.
2263  * of the USB DMA buffer allocated for this USB transfer.
2405 		 * 6) HW completed transfer during callback  in usbd_callback_wrapper()
2415 		 * transfer queues get a chance.  in usbd_callback_wrapper()
2424 	 * 1) We are starting a transfer  in usbd_callback_wrapper()
2425 	 * 2) We are prematurely calling back a transfer  in usbd_callback_wrapper()
2426 	 * 3) We are stopping a transfer  in usbd_callback_wrapper()
2430 	/* get next USB transfer in the queue */  in usbd_callback_wrapper()
2510 		/* "usbd_transfer_drain()" is waiting for end of transfer */  in usbd_callback_wrapper()
2525  * transfer. This code path is usually only used when there is an USB
2542  *  - This function is used to remove an USB transfer from a USB
2543  *  transfer queue.
2562  *  - This function is used to insert an USB transfer into a USB *
2563  *  transfer queue.
2571 	 * Insert the USB transfer into the queue, if it is not  in usbd_transfer_enqueue()
2572 	 * already on a USB transfer queue:  in usbd_transfer_enqueue()
2583  *  - This function is used to remove an USB transfer from the busdma,
2586  *  - This function is used to queue the USB transfer on the done
2589  *  - This function is used to stop any USB transfer timeouts.
2602 	 * This can happen during transfer cancel.  in usbd_transfer_done()
2606 		/* end of control transfer, if any */  in usbd_transfer_done()
2610 	/* only set transfer error, if not already set */  in usbd_transfer_done()
2618 	 * If we are waiting on a queue, just remove the USB transfer  in usbd_transfer_done()
2652 	/* call the USB transfer callback */  in usbd_transfer_done()
2659  * This function is called to start the USB transfer when
2677 	/* the transfer can now be cancelled */  in usbd_transfer_start_cb()
2680 	/* start USB transfer, if no error */  in usbd_transfer_start_cb()
2684 	/* check for transfer error */  in usbd_transfer_start_cb()
2715  * queues a zero-length USB transfer if the flag was set.
2797  * This function is used to add an USB transfer to the pipe transfer list.
2859 				 * The transfer will be continued when  in usbd_pipe_start()
2888 	 * 1) Start the first transfer queued.  in usbd_pipe_start()
2890 	 * 2) Re-start the current USB transfer.  in usbd_pipe_start()
2894 	 * pre transfer start delay:  in usbd_pipe_start()
2911 	/* the transfer can now be cancelled */  in usbd_pipe_start()
2914 	/* start USB transfer, if no error */  in usbd_pipe_start()
2918 	/* check for transfer error */  in usbd_pipe_start()
2929  * transfer. If the timeout has been deferred the callback given by
2946  *  - This function will update variables in an USB transfer after
2947  *  that the USB transfer is complete.
2949  *  - This function is used to start the next USB transfer on the
2950  *  ep transfer queue, if any.
2952  * NOTE: In some special cases the USB transfer will not be removed from
2953  * the pipe queue, but remain first. To enforce USB transfer removal call
3062 		/* end of control transfer, if any */  in usbd_callback_wrapper_sub()
3091 			/* end of control transfer, if any */  in usbd_callback_wrapper_sub()
3098 					    "Short Transfer on endpoint %p.\n",  in usbd_callback_wrapper_sub()
3106 			 * control transfer:  in usbd_callback_wrapper_sub()
3109 				DPRINTFN(5, "xfer=%p: Control transfer "  in usbd_callback_wrapper_sub()
3119 	 * If the current USB transfer is completing we need to start the  in usbd_callback_wrapper_sub()
3128 			/* there is another USB transfer waiting */  in usbd_callback_wrapper_sub()
3130 			/* this is the last USB transfer */  in usbd_callback_wrapper_sub()
3144  * transfer.
3151 		 * If the transfer is not already processing,  in usb_command_wrapper()
3212  * transfer.
3237 				 * starting the USB transfer must be  in usbd_ctrl_transfer_setup()
3262 	 * Unsetup any existing USB transfer:  in usbd_ctrl_transfer_setup()
3272 	 * Try to setup a new USB transfer for the  in usbd_ctrl_transfer_setup()
3281 		    "USB transfer\n");  in usbd_ctrl_transfer_setup()
3329  *  xfer1: Clear Stall Control Transfer
3330  *  xfer2: Stalled USB Transfer
3393 		/* copy in the transfer */  in usbd_clear_stall_callback()
3443 			continue;	/* no USB transfer */  in usbd_transfer_poll()
3475 			/* make sure that the transfer mutex is not locked */  in usbd_transfer_poll()
3511 		/* restore transfer mutex */  in usbd_transfer_poll()
3664  * transfer was completed by the hardware. The returned value wraps
3703 	 * Check if it is the first transfer or if the future frame  in usbd_xfer_get_isochronous_start_frame()
3710 		/* Schedule transfer 2 milliseconds into the future. */  in usbd_xfer_get_isochronous_start_frame()