sys/bus/u4b/usb_transfer.h

   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_ */