usb_transfer.h (5579B) - Raw
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef _USB_TRANSFER_H_ 29 #define _USB_TRANSFER_H_ 30 31 /* 32 * A few words about USB transfer states: 33 * ====================================== 34 * 35 * USB transfers can have multiple states, because they can be 36 * cancelled and started again and this cannot always be done 37 * atomically under a mutex. One reason for this is that the USB 38 * hardware sometimes needs to wait for DMA controllers to finish 39 * which is done asynchronously and grows the statemachine. 40 */ 41 42 /* 43 * The following structure defines the messages that is used to signal 44 * the "done_p" USB process. 45 */ 46 struct usb_done_msg { 47 struct usb_proc_msg hdr; 48 struct usb_xfer_root *xroot; 49 }; 50 51 #define USB_DMATAG_TO_XROOT(dpt) \ 52 __containerof(dpt, struct usb_xfer_root, dma_parent_tag) 53 54 /* 55 * The following structure is used to keep information about memory 56 * that should be automatically freed at the moment all USB transfers 57 * have been freed. 58 */ 59 struct usb_xfer_root { 60 struct usb_dma_parent_tag dma_parent_tag; 61 #if USB_HAVE_BUSDMA 62 struct usb_xfer_queue dma_q; 63 #endif 64 struct usb_xfer_queue done_q; 65 struct usb_done_msg done_m[2]; 66 struct cv cv_drain; 67 68 struct usb_process *done_p; /* pointer to callback process */ 69 void *memory_base; 70 struct mtx *xfer_mtx; /* cannot be changed during operation */ 71 #if USB_HAVE_BUSDMA 72 struct usb_page_cache *dma_page_cache_start; 73 struct usb_page_cache *dma_page_cache_end; 74 #endif 75 struct usb_page_cache *xfer_page_cache_start; 76 struct usb_page_cache *xfer_page_cache_end; 77 struct usb_bus *bus; /* pointer to USB bus (cached) */ 78 struct usb_device *udev; /* pointer to USB device */ 79 80 usb_size_t memory_size; 81 usb_size_t setup_refcount; 82 #if USB_HAVE_BUSDMA 83 usb_frcount_t dma_nframes; /* number of page caches to load */ 84 usb_frcount_t dma_currframe; /* currect page cache number */ 85 usb_frlength_t dma_frlength_0; /* length of page cache zero */ 86 uint8_t dma_error; /* set if virtual memory could not be 87 * loaded */ 88 #endif 89 uint8_t done_sleep; /* set if done thread is sleeping */ 90 }; 91 92 /* 93 * The following structure is used when setting up an array of USB 94 * transfers. 95 */ 96 struct usb_setup_params { 97 struct usb_dma_tag *dma_tag_p; 98 struct usb_page *dma_page_ptr; 99 struct usb_page_cache *dma_page_cache_ptr; /* these will be 100 * auto-freed */ 101 struct usb_page_cache *xfer_page_cache_ptr; /* these will not be 102 * auto-freed */ 103 struct usb_device *udev; 104 struct usb_xfer *curr_xfer; 105 const struct usb_config *curr_setup; 106 const struct usb_pipe_methods *methods; 107 void *buf; 108 usb_frlength_t *xfer_length_ptr; 109 110 usb_size_t size[7]; 111 usb_frlength_t bufsize; 112 usb_frlength_t bufsize_max; 113 114 uint32_t hc_max_frame_size; 115 uint16_t hc_max_packet_size; 116 uint8_t hc_max_packet_count; 117 enum usb_dev_speed speed; 118 uint8_t dma_tag_max; 119 usb_error_t err; 120 }; 121 122 /* function prototypes */ 123 124 uint8_t usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm, 125 struct usb_page_cache **ppc, usb_size_t size, usb_size_t align, 126 usb_size_t count); 127 void usb_dma_delay_done_cb(struct usb_xfer *); 128 void usb_command_wrapper(struct usb_xfer_queue *pq, 129 struct usb_xfer *xfer); 130 void usbd_pipe_enter(struct usb_xfer *xfer); 131 void usbd_pipe_start(struct usb_xfer_queue *pq); 132 void usbd_transfer_dequeue(struct usb_xfer *xfer); 133 void usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error); 134 void usbd_transfer_enqueue(struct usb_xfer_queue *pq, 135 struct usb_xfer *xfer); 136 void usbd_transfer_setup_sub(struct usb_setup_params *parm); 137 void usbd_ctrl_transfer_setup(struct usb_device *udev); 138 void usbd_clear_stall_locked(struct usb_device *udev, 139 struct usb_endpoint *ep); 140 void usbd_clear_data_toggle(struct usb_device *udev, 141 struct usb_endpoint *ep); 142 usb_callback_t usbd_do_request_callback; 143 usb_callback_t usb_handle_request_callback; 144 usb_callback_t usb_do_clear_stall_callback; 145 void usbd_transfer_timeout_ms(struct usb_xfer *xfer, 146 void (*cb) (void *arg), usb_timeout_t ms); 147 usb_timeout_t usbd_get_dma_delay(struct usb_device *udev); 148 void usbd_transfer_power_ref(struct usb_xfer *xfer, int val); 149 uint8_t usbd_xfer_get_isochronous_start_frame(struct usb_xfer *, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t *); 150 151 #endif /* _USB_TRANSFER_H_ */