1 /* $FreeBSD: head/sys/dev/usb/usb_transfer.h 228056 2011-11-28 09:54:41Z hselasky $ */ 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 * Definition of internal USB transfer states: 32 * =========================================== 33 * 34 * The main reason there are many USB states is that we are allowed to 35 * cancel USB transfers, then start the USB transfer again and that 36 * this state transaction cannot always be done in a single atomic 37 * operation without blocking the calling thread. One reason for this 38 * is that the USB hardware sometimes needs to wait for DMA 39 * controllers to finish which is done asynchronously and grows the 40 * statemachine. 41 * 42 * When extending the following statemachine there are basically two 43 * things you should think about: Which states should be executed or 44 * modified in case of USB transfer stop and which states should be 45 * executed or modified in case of USB transfer start. Also respect 46 * the "can_cancel_immed" flag which basically tells if you can go 47 * directly from a wait state to the cancelling states. 48 */ 49 50 enum { 51 /* XFER start execute state */ 52 53 /* USB_ST_SETUP = 0 (already defined) */ 54 55 /* XFER transferred execute state */ 56 57 /* USB_ST_TRANSFERRED = 1 (already defined) */ 58 59 /* XFER error execute state */ 60 61 /* USB_ST_ERROR = 2 (already defined) */ 62 63 /* XFER restart after error execute state */ 64 65 USB_ST_RESTART = 8, 66 67 /* XFER transfer idle state */ 68 69 USB_ST_WAIT_SETUP, 70 71 /* Other XFER execute states */ 72 73 USB_ST_PIPE_OPEN = 16, 74 USB_ST_PIPE_OPEN_ERROR, 75 USB_ST_PIPE_OPEN_RESTART, 76 77 USB_ST_BDMA_LOAD, 78 USB_ST_BDMA_LOAD_ERROR, 79 USB_ST_BDMA_LOAD_RESTART, 80 81 USB_ST_IVAL_DLY, 82 USB_ST_IVAL_DLY_ERROR, 83 USB_ST_IVAL_DLY_RESTART, 84 85 USB_ST_PIPE_STALL, 86 USB_ST_PIPE_STALL_ERROR, 87 USB_ST_PIPE_STALL_RESTART, 88 89 USB_ST_ENTER, 90 USB_ST_ENTER_ERROR, 91 USB_ST_ENTER_RESTART, 92 93 USB_ST_START, 94 USB_ST_START_ERROR, 95 USB_ST_START_RESTART, 96 97 USB_ST_PIPE_CLOSE, 98 USB_ST_PIPE_CLOSE_ERROR, 99 USB_ST_PIPE_CLOSE_RESTART, 100 101 USB_ST_BDMA_DLY, 102 USB_ST_BDMA_DLY_ERROR, 103 USB_ST_BDMA_DLY_RESTART, 104 105 /* XFER transfer wait states */ 106 107 USB_ST_WAIT_PIPE_OPEN = 64, 108 USB_ST_WAIT_PIPE_OPEN_ERROR, 109 USB_ST_WAIT_PIPE_OPEN_RESTART, 110 111 USB_ST_WAIT_BDMA_LOAD, 112 USB_ST_WAIT_BDMA_LOAD_ERROR, 113 USB_ST_WAIT_BDMA_LOAD_RESTART, 114 115 USB_ST_WAIT_IVAL_DLY, 116 USB_ST_WAIT_IVAL_DLY_ERROR, 117 USB_ST_WAIT_IVAL_DLY_RESTART, 118 119 USB_ST_WAIT_PIPE_STALL, 120 USB_ST_WAIT_PIPE_STALL_ERROR, 121 USB_ST_WAIT_PIPE_STALL_RESTART, 122 123 USB_ST_WAIT_ENTER, 124 USB_ST_WAIT_ENTER_ERROR, 125 USB_ST_WAIT_ENTER_RESTART, 126 127 USB_ST_WAIT_START, 128 USB_ST_WAIT_START_ERROR, 129 USB_ST_WAIT_START_RESTART, 130 131 USB_ST_WAIT_PIPE_CLOSE, 132 USB_ST_WAIT_PIPE_CLOSE_ERROR, 133 USB_ST_WAIT_PIPE_CLOSE_RESTART, 134 135 USB_ST_WAIT_BDMA_DLY, 136 USB_ST_WAIT_BDMA_DLY_ERROR, 137 USB_ST_WAIT_BDMA_DLY_RESTART, 138 139 USB_ST_WAIT_TRANSFERRED, 140 USB_ST_WAIT_TRANSFERRED_ERROR, 141 USB_ST_WAIT_TRANSFERRED_RESTART, 142 }; 143 144 /* 145 * The following structure defines the messages that is used to signal 146 * the "done_p" USB process. 147 */ 148 struct usb_done_msg { 149 struct usb_proc_msg hdr; 150 struct usb_xfer_root *xroot; 151 }; 152 153 #define USB_DMATAG_TO_XROOT(dpt) \ 154 ((struct usb_xfer_root *)( \ 155 ((uint8_t *)(dpt)) - \ 156 ((uint8_t *)&((struct usb_xfer_root *)0)->dma_parent_tag))) 157 158 /* 159 * The following structure is used to keep information about memory 160 * that should be automatically freed at the moment all USB transfers 161 * have been freed. 162 */ 163 struct usb_xfer_root { 164 struct usb_dma_parent_tag dma_parent_tag; 165 #if USB_HAVE_BUSDMA 166 struct usb_xfer_queue dma_q; 167 #endif 168 struct usb_xfer_queue done_q; 169 struct usb_done_msg done_m[2]; 170 struct cv cv_drain; 171 172 struct usb_process *done_p; /* pointer to callback process */ 173 void *memory_base; 174 struct lock *xfer_lock; /* cannot be changed during operation */ 175 #if USB_HAVE_BUSDMA 176 struct usb_page_cache *dma_page_cache_start; 177 struct usb_page_cache *dma_page_cache_end; 178 #endif 179 struct usb_page_cache *xfer_page_cache_start; 180 struct usb_page_cache *xfer_page_cache_end; 181 struct usb_bus *bus; /* pointer to USB bus (cached) */ 182 struct usb_device *udev; /* pointer to USB device */ 183 184 usb_size_t memory_size; 185 usb_size_t setup_refcount; 186 #if USB_HAVE_BUSDMA 187 usb_frcount_t dma_nframes; /* number of page caches to load */ 188 usb_frcount_t dma_currframe; /* currect page cache number */ 189 usb_frlength_t dma_frlength_0; /* length of page cache zero */ 190 uint8_t dma_error; /* set if virtual memory could not be 191 * loaded */ 192 #endif 193 uint8_t done_sleep; /* set if done thread is sleeping */ 194 }; 195 196 /* 197 * The following structure is used when setting up an array of USB 198 * transfers. 199 */ 200 struct usb_setup_params { 201 struct usb_dma_tag *dma_tag_p; 202 struct usb_page *dma_page_ptr; 203 struct usb_page_cache *dma_page_cache_ptr; /* these will be 204 * auto-freed */ 205 struct usb_page_cache *xfer_page_cache_ptr; /* these will not be 206 * auto-freed */ 207 struct usb_device *udev; 208 struct usb_xfer *curr_xfer; 209 const struct usb_config *curr_setup; 210 const struct usb_pipe_methods *methods; 211 void *buf; 212 usb_frlength_t *xfer_length_ptr; 213 214 usb_size_t size[7]; 215 usb_frlength_t bufsize; 216 usb_frlength_t bufsize_max; 217 218 uint32_t hc_max_frame_size; 219 uint16_t hc_max_packet_size; 220 uint8_t hc_max_packet_count; 221 enum usb_dev_speed speed; 222 uint8_t dma_tag_max; 223 usb_error_t err; 224 }; 225 226 /* function prototypes */ 227 228 uint8_t usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm, 229 struct usb_page_cache **ppc, usb_size_t size, usb_size_t align, 230 usb_size_t count); 231 void usb_dma_delay_done_cb(struct usb_xfer *); 232 void usb_command_wrapper(struct usb_xfer_queue *pq, 233 struct usb_xfer *xfer); 234 void usbd_pipe_enter(struct usb_xfer *xfer); 235 void usbd_pipe_start(struct usb_xfer_queue *pq); 236 void usbd_transfer_dequeue(struct usb_xfer *xfer); 237 void usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error); 238 void usbd_transfer_enqueue(struct usb_xfer_queue *pq, 239 struct usb_xfer *xfer); 240 void usbd_transfer_setup_sub(struct usb_setup_params *parm); 241 void usbd_ctrl_transfer_setup(struct usb_device *udev); 242 void usbd_clear_stall_locked(struct usb_device *udev, 243 struct usb_endpoint *ep); 244 void usbd_clear_data_toggle(struct usb_device *udev, 245 struct usb_endpoint *ep); 246 usb_callback_t usbd_do_request_callback; 247 usb_callback_t usb_handle_request_callback; 248 usb_callback_t usb_do_clear_stall_callback; 249 void usbd_transfer_timeout_ms(struct usb_xfer *xfer, 250 void (*cb) (void *arg), usb_timeout_t ms); 251 usb_timeout_t usbd_get_dma_delay(struct usb_device *udev); 252 void usbd_transfer_power_ref(struct usb_xfer *xfer, int val); 253 254 #endif /* _USB_TRANSFER_H_ */ 255