Commit e4a486e9 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman

USB serial core

added /proc support through the tty layer.
parent 8e1db0c5
......@@ -15,6 +15,10 @@
*
* See Documentation/usb/usb-serial.txt for more information on using this driver
*
* (04/10/2002) gkh
* added serial_read_proc function which creates a
* /proc/tty/driver/usb-serial file.
*
* (03/27/2002) gkh
* Got USB serial console code working properly and merged into the main
* version of the tree. Thanks to Randy Dunlap for the initial version
......@@ -340,7 +344,7 @@
/*
* Version Information
*/
#define DRIVER_VERSION "v1.4"
#define DRIVER_VERSION "v1.5"
#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux-usb/"
#define DRIVER_DESC "USB Serial Driver core"
......@@ -844,6 +848,48 @@ static void serial_shutdown (struct usb_serial *serial)
generic_shutdown(serial);
}
static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
{
struct usb_serial *serial;
int length = 0;
int i;
off_t begin = 0;
char tmp[40];
dbg(__FUNCTION__);
length += sprintf (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION);
for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
serial = get_serial_by_minor(i);
if (serial == NULL)
continue;
length += sprintf (page+length, "%d:", i);
if (serial->type->owner)
length += sprintf (page+length, " module:%s", serial->type->owner->name);
length += sprintf (page+length, " name:\"%s\"", serial->type->name);
length += sprintf (page+length, " vendor:%04x product:%04x", serial->vendor, serial->product);
length += sprintf (page+length, " num_ports:%d", serial->num_ports);
length += sprintf (page+length, " port:%d", i - serial->minor + 1);
usb_make_path(serial->dev, tmp, sizeof(tmp));
length += sprintf (page+length, " path:%s", tmp);
length += sprintf (page+length, "\n");
if ((length + begin) > (off + count))
goto done;
if ((length + begin) < off) {
begin += length;
length = 0;
}
}
*eof = 1;
done:
if (off >= (length + begin))
return 0;
*start = page + (off-begin);
return ((count < begin+length-off) ? count : begin+length-off);
}
/*****************************************************************************
* generic devices specific driver functions
*****************************************************************************/
......@@ -1491,6 +1537,7 @@ static struct tty_driver serial_tty_driver = {
unthrottle: serial_unthrottle,
break_ctl: serial_break,
chars_in_buffer: serial_chars_in_buffer,
read_proc: serial_read_proc,
};
......
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