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 #define ACM_REQ_COMMAND         0x00
  31 #define ACM_REQ_RESPONSE        0x01
  32 #define ACM_REQ_SET_FEATURE     0x02
  33 #define ACM_REQ_GET_FEATURE     0x03
  34 #define ACM_REQ_CLEAR_FEATURE   0x04
  35
  36 #define ACM_REQ_SET_LINE        0x20
  37 #define ACM_REQ_GET_LINE        0x21
  38 #define ACM_REQ_SET_CONTROL     0x22
  39 #define ACM_REQ_SEND_BREAK      0x23
  40
  41 /*
  42  * IRQs.
  43  */
  44
  45 #define ACM_IRQ_NETWORK         0x00
  46 #define ACM_IRQ_LINE_STATE      0x20
  47
  48 /*
  49  * Output control lines.
  50  */
  51
  52 #define ACM_CTRL_DTR            0x01
  53 #define ACM_CTRL_RTS            0x02
  54
  55 /*
  56  * Input control lines and line errors.
  57  */
  58
  59 #define ACM_CTRL_DCD            0x01
  60 #define ACM_CTRL_DSR            0x02
  61 #define ACM_CTRL_BRK            0x04
  62 #define ACM_CTRL_RI             0x08
  63
  64 #define ACM_CTRL_FRAMING        0x10
  65 #define ACM_CTRL_PARITY         0x20
  66 #define ACM_CTRL_OVERRUN        0x40
  67
  68 /*
  69  * Line speed and caracter encoding.
  70  */
  71
  72 struct acm_line {
  73         __u32 speed;
  74         __u8 stopbits;
  75         __u8 parity;
  76         __u8 databits;
  77 } __attribute__ ((packed));
  78
  79 /*
  80  * Internal driver structures.
  81  */
  82
  83 struct acm {
  84         struct usb_device *dev;                         /* the corresponding usb device */
  85         struct usb_interface *control;                  /* control interface */
  86         struct usb_interface *data;                     /* data interface */
  87         struct tty_struct *tty;                         /* the corresponding tty */
  88         struct urb *ctrlurb, *readurb, *writeurb;       /* urbs */
  89         struct acm_line line;                           /* line coding (bits, stop, parity) */
  90         struct work_struct work;                        /* work queue entry for line discipline waking up */
  91         struct tasklet_struct bh;                       /* rx processing */
  92         unsigned int ctrlin;                            /* input control lines (DCD, DSR, RI, break, overruns) */
  93         unsigned int ctrlout;                           /* output control lines (DTR, RTS) */
  94         unsigned int writesize;                         /* max packet size for the output bulk endpoint */
  95         unsigned int used;                              /* someone has this acm's device open */
  96         unsigned int minor;                             /* acm minor number */
  97         unsigned char throttle;                         /* throttled by tty layer */
  98         unsigned char clocal;                           /* termios CLOCAL */
  99         unsigned char ready_for_write;                  /* write urb can be used */
 100 };
 101
 102 /* "Union Functional Descriptor" from CDC spec 5.2.3.X */
 103 struct union_desc {
 104         u8      bLength;
 105         u8      bDescriptorType;
 106         u8      bDescriptorSubType;
 107
 108         u8      bMasterInterface0;
 109         u8      bSlaveInterface0;
 110         /* ... and there could be other slave interfaces */
 111 } __attribute__ ((packed));
 112
 113 #define CDC_UNION_TYPE          0x06
 114 #define CDC_DATA_INTERFACE_TYPE 0x0a
 115