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- /*
- *
- * Includes for cdc-acm.c
- *
- * Mainly take from usbnet's cdc-ether part
- *
- */
- /*
- * CMSPAR, some architectures can't have space and mark parity.
- */
- #ifndef CMSPAR
- #define CMSPAR 0
- #endif
- /*
- * Major and minor numbers.
- */
- #define ACM_TTY_MAJOR 166
- #define ACM_TTY_MINORS 32
- /*
- * Requests.
- */
- #define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
- /*
- * Output control lines.
- */
- #define ACM_CTRL_DTR 0x01
- #define ACM_CTRL_RTS 0x02
- /*
- * Input control lines and line errors.
- */
- #define ACM_CTRL_DCD 0x01
- #define ACM_CTRL_DSR 0x02
- #define ACM_CTRL_BRK 0x04
- #define ACM_CTRL_RI 0x08
- #define ACM_CTRL_FRAMING 0x10
- #define ACM_CTRL_PARITY 0x20
- #define ACM_CTRL_OVERRUN 0x40
- /*
- * Internal driver structures.
- */
- /*
- * The only reason to have several buffers is to accomodate assumptions
- * in line disciplines. They ask for empty space amount, receive our URB size,
- * and proceed to issue several 1-character writes, assuming they will fit.
- * The very first write takes a complete URB. Fortunately, this only happens
- * when processing onlcr, so we only need 2 buffers.
- */
- #define ACM_NWB 2
- struct acm_wb {
- unsigned char *buf;
- dma_addr_t dmah;
- int len;
- int use;
- };
- struct acm {
- struct usb_device *dev; /* the corresponding usb device */
- struct usb_interface *control; /* control interface */
- struct usb_interface *data; /* data interface */
- struct tty_struct *tty; /* the corresponding tty */
- struct urb *ctrlurb, *readurb, *writeurb; /* urbs */
- u8 *ctrl_buffer, *read_buffer; /* buffers of urbs */
- dma_addr_t ctrl_dma, read_dma; /* dma handles of buffers */
- struct acm_wb wb[ACM_NWB];
- int write_current; /* current write buffer */
- int write_used; /* number of non-empty write buffers */
- int write_ready; /* write urb is not running */
- spinlock_t write_lock;
- struct usb_cdc_line_coding line; /* bits, stop, parity */
- struct work_struct work; /* work queue entry for line discipline waking up */
- struct tasklet_struct bh; /* rx processing */
- spinlock_t throttle_lock; /* synchronize throtteling and read callback */
- unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
- unsigned int ctrlout; /* output control lines (DTR, RTS) */
- unsigned int writesize; /* max packet size for the output bulk endpoint */
- unsigned int readsize,ctrlsize; /* buffer sizes for freeing */
- unsigned int used; /* someone has this acm's device open */
- unsigned int minor; /* acm minor number */
- unsigned char throttle; /* throttled by tty layer */
- unsigned char clocal; /* termios CLOCAL */
- unsigned char resubmit_to_unthrottle; /* throtteling has disabled the read urb */
- unsigned int ctrl_caps; /* control capabilities from the class specific header */
- };
- #define CDC_DATA_INTERFACE_TYPE 0x0a
- /* constants describing various quirks and errors */
- #define NO_UNION_NORMAL 1
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