/* * * 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#define ACM_NRU  16#define ACM_NRB  16struct acm_wb {	unsigned char *buf;	dma_addr_t dmah;	int len;	int use;};struct acm_rb {	struct list_head	list;	int			size;	unsigned char		*base;	dma_addr_t		dma;};struct acm_ru {	struct list_head	list;	struct acm_rb		*buffer;	struct urb		*urb;	struct acm		*instance;};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, *writeurb;			/* urbs */	u8 *ctrl_buffer;				/* buffers of urbs */	dma_addr_t ctrl_dma;				/* dma handles of buffers */	struct acm_wb wb[ACM_NWB];	struct acm_ru ru[ACM_NRU];	struct acm_rb rb[ACM_NRB];	int rx_endpoint;	spinlock_t read_lock;	struct list_head spare_read_urbs;	struct list_head spare_read_bufs;	struct list_head filled_read_bufs;	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 urb_task;                 /* 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 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