1 /* $FreeBSD: releng/8.3/sys/dev/usb/usb_transfer.h 215944 2010-11-27 19:35:12Z thompsa $ */
2 /*-
3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #ifndef _USB_TRANSFER_H_
28 #define _USB_TRANSFER_H_
29
30 /*
31 * The following structure defines the messages that is used to signal
32 * the "done_p" USB process.
33 */
34 struct usb_done_msg {
35 struct usb_proc_msg hdr;
36 struct usb_xfer_root *xroot;
37 };
38
39 #define USB_DMATAG_TO_XROOT(dpt) \
40 ((struct usb_xfer_root *)( \
41 ((uint8_t *)(dpt)) - \
42 ((uint8_t *)&((struct usb_xfer_root *)0)->dma_parent_tag)))
43
44 /*
45 * The following structure is used to keep information about memory
46 * that should be automatically freed at the moment all USB transfers
47 * have been freed.
48 */
49 struct usb_xfer_root {
50 struct usb_dma_parent_tag dma_parent_tag;
51 #if USB_HAVE_BUSDMA
52 struct usb_xfer_queue dma_q;
53 #endif
54 struct usb_xfer_queue done_q;
55 struct usb_done_msg done_m[2];
56 struct cv cv_drain;
57
58 struct usb_process *done_p; /* pointer to callback process */
59 void *memory_base;
60 struct mtx *xfer_mtx; /* cannot be changed during operation */
61 #if USB_HAVE_BUSDMA
62 struct usb_page_cache *dma_page_cache_start;
63 struct usb_page_cache *dma_page_cache_end;
64 #endif
65 struct usb_page_cache *xfer_page_cache_start;
66 struct usb_page_cache *xfer_page_cache_end;
67 struct usb_bus *bus; /* pointer to USB bus (cached) */
68 struct usb_device *udev; /* pointer to USB device */
69
70 usb_size_t memory_size;
71 usb_size_t setup_refcount;
72 #if USB_HAVE_BUSDMA
73 usb_frcount_t dma_nframes; /* number of page caches to load */
74 usb_frcount_t dma_currframe; /* currect page cache number */
75 usb_frlength_t dma_frlength_0; /* length of page cache zero */
76 uint8_t dma_error; /* set if virtual memory could not be
77 * loaded */
78 #endif
79 uint8_t done_sleep; /* set if done thread is sleeping */
80 };
81
82 /*
83 * The following structure is used when setting up an array of USB
84 * transfers.
85 */
86 struct usb_setup_params {
87 struct usb_dma_tag *dma_tag_p;
88 struct usb_page *dma_page_ptr;
89 struct usb_page_cache *dma_page_cache_ptr; /* these will be
90 * auto-freed */
91 struct usb_page_cache *xfer_page_cache_ptr; /* these will not be
92 * auto-freed */
93 struct usb_device *udev;
94 struct usb_xfer *curr_xfer;
95 const struct usb_config *curr_setup;
96 const struct usb_pipe_methods *methods;
97 void *buf;
98 usb_frlength_t *xfer_length_ptr;
99
100 usb_size_t size[7];
101 usb_frlength_t bufsize;
102 usb_frlength_t bufsize_max;
103
104 uint32_t hc_max_frame_size;
105 uint16_t hc_max_packet_size;
106 uint8_t hc_max_packet_count;
107 enum usb_dev_speed speed;
108 uint8_t dma_tag_max;
109 usb_error_t err;
110 };
111
112 /* function prototypes */
113
114 uint8_t usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm,
115 struct usb_page_cache **ppc, usb_size_t size, usb_size_t align,
116 usb_size_t count);
117 void usb_dma_delay_done_cb(struct usb_xfer *);
118 void usb_command_wrapper(struct usb_xfer_queue *pq,
119 struct usb_xfer *xfer);
120 void usbd_pipe_enter(struct usb_xfer *xfer);
121 void usbd_pipe_start(struct usb_xfer_queue *pq);
122 void usbd_transfer_dequeue(struct usb_xfer *xfer);
123 void usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error);
124 void usbd_transfer_enqueue(struct usb_xfer_queue *pq,
125 struct usb_xfer *xfer);
126 void usbd_transfer_setup_sub(struct usb_setup_params *parm);
127 void usbd_ctrl_transfer_setup(struct usb_device *udev);
128 void usbd_clear_stall_locked(struct usb_device *udev,
129 struct usb_endpoint *ep);
130 void usbd_clear_data_toggle(struct usb_device *udev,
131 struct usb_endpoint *ep);
132 usb_callback_t usbd_do_request_callback;
133 usb_callback_t usb_handle_request_callback;
134 usb_callback_t usb_do_clear_stall_callback;
135 void usbd_transfer_timeout_ms(struct usb_xfer *xfer,
136 void (*cb) (void *arg), usb_timeout_t ms);
137 usb_timeout_t usbd_get_dma_delay(struct usb_device *udev);
138 void usbd_transfer_power_ref(struct usb_xfer *xfer, int val);
139
140 #endif /* _USB_TRANSFER_H_ */
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