/* $FreeBSD$ */
/*-
* 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.
*/
/*
* Including this file is mandatory for all USB related c-files in the kernel.
*/
#ifndef _USB_CORE_H_
#define _USB_CORE_H_
/*
* The following macro will tell if an USB transfer is currently
* receiving or transferring data.
*/
#define USB_GET_DATA_ISREAD(xfer) ((xfer)->flags_int.usb_mode == \
USB_MODE_DEVICE ? (((xfer)->endpointno & UE_DIR_IN) ? 0 : 1) : \
(((xfer)->endpointno & UE_DIR_IN) ? 1 : 0))
/* locking wrappers for BUS lock */
#define USB_BUS_LOCK(_b) USB_MTX_LOCK(&(_b)->bus_mtx)
#define USB_BUS_UNLOCK(_b) USB_MTX_UNLOCK(&(_b)->bus_mtx)
#define USB_BUS_LOCK_ASSERT(_b, _t) USB_MTX_ASSERT(&(_b)->bus_mtx, _t)
/* locking wrappers for BUS spin lock */
#define USB_BUS_SPIN_LOCK(_b) USB_MTX_LOCK_SPIN(&(_b)->bus_spin_lock)
#define USB_BUS_SPIN_UNLOCK(_b) USB_MTX_UNLOCK_SPIN(&(_b)->bus_spin_lock)
#define USB_BUS_SPIN_LOCK_ASSERT(_b, _t) USB_MTX_ASSERT(&(_b)->bus_spin_lock, _t)
/* locking wrappers for XFER lock */
#define USB_XFER_LOCK(_x) USB_MTX_LOCK((_x)->xroot->xfer_mtx)
#define USB_XFER_UNLOCK(_x) USB_MTX_UNLOCK((_x)->xroot->xfer_mtx)
#define USB_XFER_LOCK_ASSERT(_x, _t) USB_MTX_ASSERT((_x)->xroot->xfer_mtx, _t)
/* helper for converting pointers to integers */
#define USB_P2U(ptr) \
(((const uint8_t *)(ptr)) - ((const uint8_t *)0))
/* helper for computing offsets */
#define USB_ADD_BYTES(ptr,size) \
((void *)(USB_P2U(ptr) + (size)))
/* debug macro */
#define USB_ASSERT KASSERT
/* structure prototypes */
struct file;
struct usb_bus;
struct usb_device;
struct usb_device_request;
struct usb_page;
struct usb_page_cache;
struct usb_xfer;
struct usb_xfer_root;
struct usb_string_lang;
/* typedefs */
/* structures */
/*
* The following structure defines a set of internal USB transfer
* flags.
*/
struct usb_xfer_flags_int {
enum usb_hc_mode usb_mode; /* shadow copy of "udev->usb_mode" */
uint16_t control_rem; /* remainder in bytes */
uint8_t open:1; /* set if USB pipe has been opened */
uint8_t transferring:1; /* set if an USB transfer is in
* progress */
uint8_t did_dma_delay:1; /* set if we waited for HW DMA */
uint8_t did_close:1; /* set if we closed the USB transfer */
uint8_t draining:1; /* set if we are draining an USB
* transfer */
uint8_t started:1; /* keeps track of started or stopped */
uint8_t bandwidth_reclaimed:1;
uint8_t control_xfr:1; /* set if control transfer */
uint8_t control_hdr:1; /* set if control header should be
* sent */
uint8_t control_act:1; /* set if control transfer is active */
uint8_t control_stall:1; /* set if control transfer should be stalled */
uint8_t control_did_data:1; /* set if control DATA has been transferred */
uint8_t short_frames_ok:1; /* filtered version */
uint8_t short_xfer_ok:1; /* filtered version */
#if USB_HAVE_BUSDMA
uint8_t bdma_enable:1; /* filtered version (only set if
* hardware supports DMA) */
uint8_t bdma_no_post_sync:1; /* set if the USB callback wrapper
* should not do the BUS-DMA post sync
* operation */
uint8_t bdma_setup:1; /* set if BUS-DMA has been setup */
#endif
uint8_t isochronous_xfr:1; /* set if isochronous transfer */
uint8_t curr_dma_set:1; /* used by USB HC/DC driver */
uint8_t can_cancel_immed:1; /* set if USB transfer can be
* cancelled immediately */
uint8_t doing_callback:1; /* set if executing the callback */
uint8_t maxp_was_clamped:1; /* set if the max packet size
* was outside its allowed range */
};
/*
* The following structure defines an USB transfer.
*/
struct usb_xfer {
struct usb_callout timeout_handle;
TAILQ_ENTRY(usb_xfer) wait_entry; /* used at various places */
struct usb_page_cache *buf_fixup; /* fixup buffer(s) */
struct usb_xfer_queue *wait_queue; /* pointer to queue that we
* are waiting on */
struct usb_page *dma_page_ptr;
struct usb_endpoint *endpoint; /* our USB endpoint */
struct usb_xfer_root *xroot; /* used by HC driver */
void *qh_start[2]; /* used by HC driver */
void *td_start[2]; /* used by HC driver */
void *td_transfer_first; /* used by HC driver */
void *td_transfer_last; /* used by HC driver */
void *td_transfer_cache; /* used by HC driver */
void *priv_sc; /* device driver data pointer 1 */
void *priv_fifo; /* device driver data pointer 2 */
void *local_buffer;
usb_frlength_t *frlengths;
struct usb_page_cache *frbuffers;
usb_callback_t *callback;
usb_frlength_t max_hc_frame_size;
usb_frlength_t max_data_length;
usb_frlength_t sumlen; /* sum of all lengths in bytes */
usb_frlength_t actlen; /* actual length in bytes */
usb_timeout_t timeout; /* milliseconds */
usb_frcount_t max_frame_count; /* initial value of "nframes" after
* setup */
usb_frcount_t nframes; /* number of USB frames to transfer */
usb_frcount_t aframes; /* actual number of USB frames
* transferred */
usb_stream_t stream_id; /* USB3.0 specific field */
uint16_t max_packet_size;
uint16_t max_frame_size;
uint16_t qh_pos;
uint16_t isoc_time_complete; /* in ms */
usb_timeout_t interval; /* milliseconds */
uint8_t address; /* physical USB address */
uint8_t endpointno; /* physical USB endpoint */
uint8_t max_packet_count;
uint8_t usb_state;
uint8_t fps_shift; /* down shift of FPS, 0..3 */
usb_error_t error;
struct usb_xfer_flags flags;
struct usb_xfer_flags_int flags_int;
};
/* external variables */
extern struct mtx usb_ref_lock;
extern const struct usb_string_lang usb_string_lang_en;
/* typedefs */
typedef struct malloc_type *usb_malloc_type;
/* prototypes */
#endif /* _USB_CORE_H_ */