884b600f63
This patch fixes lost LF when ACM device is used with getty/login/bash, in case of a modem which takes calls. Signed-off-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Oliver Neukum <oliver@neukum.name> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
|
|
*
|
|
* 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
|