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/* $FreeBSD$ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _USB_TRANSFER_H_
#define _USB_TRANSFER_H_
/*
* Definition of internal USB transfer states:
* ===========================================
*
* The main reason there are many USB states is that we are allowed to
* cancel USB transfers, then start the USB transfer again and that
* this state transaction cannot always be done in a single atomic
* operation without blocking the calling thread. One reason for this
* is that the USB hardware sometimes needs to wait for DMA
* controllers to finish which is done asynchronously and grows the
* statemachine.
*
* When extending the following statemachine there are basically two
* things you should think about: Which states should be executed or
* modified in case of USB transfer stop and which states should be
* executed or modified in case of USB transfer start. Also respect
* the "can_cancel_immed" flag which basically tells if you can go
* directly from a wait state to the cancelling states.
*/
enum {
/* XFER start execute state */
/* USB_ST_SETUP = 0 (already defined) */
/* XFER transferred execute state */
/* USB_ST_TRANSFERRED = 1 (already defined) */
/* XFER error execute state */
/* USB_ST_ERROR = 2 (already defined) */
/* XFER restart after error execute state */
USB_ST_RESTART = 8,
/* XFER transfer idle state */
USB_ST_WAIT_SETUP,
/* Other XFER execute states */
USB_ST_PIPE_OPEN = 16,
USB_ST_PIPE_OPEN_ERROR,
USB_ST_PIPE_OPEN_RESTART,
USB_ST_BDMA_LOAD,
USB_ST_BDMA_LOAD_ERROR,
USB_ST_BDMA_LOAD_RESTART,
USB_ST_IVAL_DLY,
USB_ST_IVAL_DLY_ERROR,
USB_ST_IVAL_DLY_RESTART,
USB_ST_PIPE_STALL,
USB_ST_PIPE_STALL_ERROR,
USB_ST_PIPE_STALL_RESTART,
USB_ST_ENTER,
USB_ST_ENTER_ERROR,
USB_ST_ENTER_RESTART,
USB_ST_START,
USB_ST_START_ERROR,
USB_ST_START_RESTART,
USB_ST_PIPE_CLOSE,
USB_ST_PIPE_CLOSE_ERROR,
USB_ST_PIPE_CLOSE_RESTART,
USB_ST_BDMA_DLY,
USB_ST_BDMA_DLY_ERROR,
USB_ST_BDMA_DLY_RESTART,
/* XFER transfer wait states */
USB_ST_WAIT_PIPE_OPEN = 64,
USB_ST_WAIT_PIPE_OPEN_ERROR,
USB_ST_WAIT_PIPE_OPEN_RESTART,
USB_ST_WAIT_BDMA_LOAD,
USB_ST_WAIT_BDMA_LOAD_ERROR,
USB_ST_WAIT_BDMA_LOAD_RESTART,
USB_ST_WAIT_IVAL_DLY,
USB_ST_WAIT_IVAL_DLY_ERROR,
USB_ST_WAIT_IVAL_DLY_RESTART,
USB_ST_WAIT_PIPE_STALL,
USB_ST_WAIT_PIPE_STALL_ERROR,
USB_ST_WAIT_PIPE_STALL_RESTART,
USB_ST_WAIT_ENTER,
USB_ST_WAIT_ENTER_ERROR,
USB_ST_WAIT_ENTER_RESTART,
USB_ST_WAIT_START,
USB_ST_WAIT_START_ERROR,
USB_ST_WAIT_START_RESTART,
USB_ST_WAIT_PIPE_CLOSE,
USB_ST_WAIT_PIPE_CLOSE_ERROR,
USB_ST_WAIT_PIPE_CLOSE_RESTART,
USB_ST_WAIT_BDMA_DLY,
USB_ST_WAIT_BDMA_DLY_ERROR,
USB_ST_WAIT_BDMA_DLY_RESTART,
USB_ST_WAIT_TRANSFERRED,
USB_ST_WAIT_TRANSFERRED_ERROR,
USB_ST_WAIT_TRANSFERRED_RESTART,
};
/*
* The following structure defines the messages that is used to signal
* the "done_p" USB process.
*/
struct usb_done_msg {
struct usb_proc_msg hdr;
struct usb_xfer_root *xroot;
};
#define USB_DMATAG_TO_XROOT(dpt) \
((struct usb_xfer_root *)( \
((uint8_t *)(dpt)) - \
((uint8_t *)&((struct usb_xfer_root *)0)->dma_parent_tag)))
/*
* The following structure is used to keep information about memory
* that should be automatically freed at the moment all USB transfers
* have been freed.
*/
struct usb_xfer_root {
struct usb_dma_parent_tag dma_parent_tag;
#if USB_HAVE_BUSDMA
struct usb_xfer_queue dma_q;
#endif
struct usb_xfer_queue done_q;
struct usb_done_msg done_m[2];
struct cv cv_drain;
struct usb_process *done_p; /* pointer to callback process */
void *memory_base;
struct mtx *xfer_mtx; /* cannot be changed during operation */
#if USB_HAVE_BUSDMA
struct usb_page_cache *dma_page_cache_start;
struct usb_page_cache *dma_page_cache_end;
#endif
struct usb_page_cache *xfer_page_cache_start;
struct usb_page_cache *xfer_page_cache_end;
struct usb_bus *bus; /* pointer to USB bus (cached) */
struct usb_device *udev; /* pointer to USB device */
usb_size_t memory_size;
usb_size_t setup_refcount;
#if USB_HAVE_BUSDMA
usb_frcount_t dma_nframes; /* number of page caches to load */
usb_frcount_t dma_currframe; /* currect page cache number */
usb_frlength_t dma_frlength_0; /* length of page cache zero */
uint8_t dma_error; /* set if virtual memory could not be
* loaded */
#endif
uint8_t done_sleep; /* set if done thread is sleeping */
};
/*
* The following structure is used when setting up an array of USB
* transfers.
*/
struct usb_setup_params {
struct usb_dma_tag *dma_tag_p;
struct usb_page *dma_page_ptr;
struct usb_page_cache *dma_page_cache_ptr; /* these will be
* auto-freed */
struct usb_page_cache *xfer_page_cache_ptr; /* these will not be
* auto-freed */
struct usb_device *udev;
struct usb_xfer *curr_xfer;
const struct usb_config *curr_setup;
const struct usb_pipe_methods *methods;
void *buf;
usb_frlength_t *xfer_length_ptr;
usb_size_t size[7];
usb_frlength_t bufsize;
usb_frlength_t bufsize_max;
uint32_t hc_max_frame_size;
uint16_t hc_max_packet_size;
uint8_t hc_max_packet_count;
enum usb_dev_speed speed;
uint8_t dma_tag_max;
usb_error_t err;
};
/* function prototypes */
uint8_t usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm,
struct usb_page_cache **ppc, usb_size_t size, usb_size_t align,
usb_size_t count);
void usb_dma_delay_done_cb(struct usb_xfer *);
void usb_command_wrapper(struct usb_xfer_queue *pq,
struct usb_xfer *xfer);
void usbd_pipe_enter(struct usb_xfer *xfer);
void usbd_pipe_start(struct usb_xfer_queue *pq);
void usbd_transfer_dequeue(struct usb_xfer *xfer);
void usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error);
void usbd_transfer_enqueue(struct usb_xfer_queue *pq,
struct usb_xfer *xfer);
void usbd_transfer_setup_sub(struct usb_setup_params *parm);
void usbd_ctrl_transfer_setup(struct usb_device *udev);
void usbd_clear_stall_locked(struct usb_device *udev,
struct usb_endpoint *ep);
void usbd_clear_data_toggle(struct usb_device *udev,
struct usb_endpoint *ep);
usb_callback_t usbd_do_request_callback;
usb_callback_t usb_handle_request_callback;
usb_callback_t usb_do_clear_stall_callback;
void usbd_transfer_timeout_ms(struct usb_xfer *xfer,
void (*cb) (void *arg), usb_timeout_t ms);
usb_timeout_t usbd_get_dma_delay(struct usb_device *udev);
void usbd_transfer_power_ref(struct usb_xfer *xfer, int val);
#endif /* _USB_TRANSFER_H_ */
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