drivers/usb/class/cdc-acm.h

   1 /*
   2  *
   3  * Includes for cdc-acm.c
   4  *
   5  * Mainly take from usbnet's cdc-ether part
   6  *
   7  */
   8
   9 /*
  10  * CMSPAR, some architectures can't have space and mark parity.
  11  */
  12
  13 #ifndef CMSPAR
  14 #define CMSPAR                  0
  15 #endif
  16
  17 /*
  18  * Major and minor numbers.
  19  */
  20
  21 #define ACM_TTY_MAJOR           166
  22 #define ACM_TTY_MINORS          32
  23
  24 /*
  25  * Requests.
  26  */
  27
  28 #define USB_RT_ACM              (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
  29
  30 /*
  31  * Output control lines.
  32  */
  33
  34 #define ACM_CTRL_DTR            0x01
  35 #define ACM_CTRL_RTS            0x02
  36
  37 /*
  38  * Input control lines and line errors.
  39  */
  40
  41 #define ACM_CTRL_DCD            0x01
  42 #define ACM_CTRL_DSR            0x02
  43 #define ACM_CTRL_BRK            0x04
  44 #define ACM_CTRL_RI             0x08
  45
  46 #define ACM_CTRL_FRAMING        0x10
  47 #define ACM_CTRL_PARITY         0x20
  48 #define ACM_CTRL_OVERRUN        0x40
  49
  50 /*
  51  * Internal driver structures.
  52  */
  53
  54 struct acm {
  55         struct usb_device *dev;                         /* the corresponding usb device */
  56         struct usb_interface *control;                  /* control interface */
  57         struct usb_interface *data;                     /* data interface */
  58         struct tty_struct *tty;                         /* the corresponding tty */
  59         struct urb *ctrlurb, *readurb, *writeurb;       /* urbs */
  60         u8 *ctrl_buffer, *read_buffer, *write_buffer;   /* buffers of urbs */
  61         dma_addr_t ctrl_dma, read_dma, write_dma;       /* dma handles of buffers */
  62         struct usb_cdc_line_coding line;                /* bits, stop, parity */
  63         struct work_struct work;                        /* work queue entry for line discipline waking up */
  64         struct tasklet_struct bh;                       /* rx processing */
  65         spinlock_t throttle_lock;                       /* synchronize throtteling and read callback */
  66         unsigned int ctrlin;                            /* input control lines (DCD, DSR, RI, break, overruns) */
  67         unsigned int ctrlout;                           /* output control lines (DTR, RTS) */
  68         unsigned int writesize;                         /* max packet size for the output bulk endpoint */
  69         unsigned int readsize,ctrlsize;                 /* buffer sizes for freeing */
  70         unsigned int used;                              /* someone has this acm's device open */
  71         unsigned int minor;                             /* acm minor number */
  72         unsigned char throttle;                         /* throttled by tty layer */
  73         unsigned char clocal;                           /* termios CLOCAL */
  74         unsigned char ready_for_write;                  /* write urb can be used */
  75         unsigned char resubmit_to_unthrottle;           /* throtteling has disabled the read urb */
  76         unsigned int ctrl_caps;                         /* control capabilities from the class specific header */
  77 };
  78
  79 #define CDC_DATA_INTERFACE_TYPE 0x0a
  80
  81 /* constants describing various quirks and errors */
  82 #define NO_UNION_NORMAL                 1