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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 accommodate 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. These values must be
* powers of 2.
*/
#define ACM_NW 16
#define ACM_NR 16
struct acm_wb {
unsigned char *buf;
dma_addr_t dmah;
int len;
int use;
struct urb *urb;
struct acm *instance;
};
struct acm_rb {
int size;
unsigned char *base;
dma_addr_t dma;
int index;
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_port port; /* our tty port data */
struct urb *ctrlurb; /* urbs */
u8 *ctrl_buffer; /* buffers of urbs */
dma_addr_t ctrl_dma; /* dma handles of buffers */
u8 *country_codes; /* country codes from device */
unsigned int country_code_size; /* size of this buffer */
unsigned int country_rel_date; /* release date of version */
struct acm_wb wb[ACM_NW];
unsigned long read_urbs_free;
struct urb *read_urbs[ACM_NR];
struct acm_rb read_buffers[ACM_NR];
int rx_buflimit;
int rx_endpoint;
spinlock_t read_lock;
int write_used; /* number of non-empty write buffers */
int transmitting;
spinlock_t write_lock;
struct mutex mutex;
bool disconnected;
struct usb_cdc_line_coding line; /* bits, stop, parity */
struct work_struct work; /* work queue entry for line discipline waking up */
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 minor; /* acm minor number */
unsigned char clocal; /* termios CLOCAL */
unsigned int ctrl_caps; /* control capabilities from the class specific header */
unsigned int susp_count; /* number of suspended interfaces */
unsigned int combined_interfaces:1; /* control and data collapsed */
unsigned int is_int_ep:1; /* interrupt endpoints contrary to spec used */
unsigned int throttled:1; /* actually throttled */
unsigned int throttle_req:1; /* throttle requested */
u8 bInterval;
struct acm_wb *delayed_wb; /* write queued for a device about to be woken */
};
#define CDC_DATA_INTERFACE_TYPE 0x0a
/* constants describing various quirks and errors */
#define NO_UNION_NORMAL 1
#define SINGLE_RX_URB 2
#define NO_CAP_LINE 4
#define NOT_A_MODEM 8
#define NO_DATA_INTERFACE 16
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