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 83