path: root/drivers/input/misc/yealink.c

/*
 * drivers/usb/input/yealink.c
 *
 * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
/*
 * Description:
 *   Driver for the USB-P1K voip usb phone.
 *   This device is produced by Yealink Network Technology Co Ltd
 *   but may be branded under several names:
 *	- Yealink usb-p1k
 *	- Tiptel 115
 *	- ...
 *
 * This driver is based on:
 *   - the usbb2k-api	http://savannah.nongnu.org/projects/usbb2k-api/
 *   - information from	http://memeteau.free.fr/usbb2k
 *   - the xpad-driver	drivers/input/joystick/xpad.c
 *
 * Thanks to:
 *   - Olivier Vandorpe, for providing the usbb2k-api.
 *   - Martin Diehl, for spotting my memory allocation bug.
 *
 * History:
 *   20050527 henk	First version, functional keyboard. Keyboard events
 *			will pop-up on the ../input/eventX bus.
 *   20050531 henk	Added led, LCD, dialtone and sysfs interface.
 *   20050610 henk	Cleanups, make it ready for public consumption.
 *   20050630 henk	Cleanups, fixes in response to comments.
 *   20050701 henk	sysfs write serialisation, fix potential unload races
 *   20050801 henk	Added ringtone, restructure USB
 *   20050816 henk	Merge 2.6.13-rc6
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/rwsem.h>
#include <linux/usb/input.h>
#include <linux/map_to_7segment.h>

#include "yealink.h"

#define DRIVER_VERSION "yld-20051230"
#define DRIVER_AUTHOR "Henk Vergonet"
#define DRIVER_DESC "Yealink phone driver"

#define YEALINK_POLLING_FREQUENCY	10	/* in [Hz] */

struct yld_status {
	u8	lcd[24];
	u8	led;
	u8	dialtone;
	u8	ringtone;
	u8	keynum;
} __attribute__ ((packed));

/*
 * Register the LCD segment and icon map
 */
#define _LOC(k,l)	{ .a = (k), .m = (l) }
#define _SEG(t, a, am, b, bm, c, cm, d, dm, e, em, f, fm, g, gm)	\
	{ .type	= (t),							\
	  .u = { .s = {	_LOC(a, am), _LOC(b, bm), _LOC(c, cm),		\
		        _LOC(d, dm), _LOC(e, em), _LOC(g, gm),		\
			_LOC(f, fm) } } }
#define _PIC(t, h, hm, n)						\
	{ .type	= (t),							\
 	  .u = { .p = { .name = (n), .a = (h), .m = (hm) } } }

static const struct lcd_segment_map {
	char	type;
	union {
		struct pictogram_map {
			u8	a,m;
			char	name[10];
		}	p;
		struct segment_map {
			u8	a,m;
		} s[7];
	} u;
} lcdMap[] = {
#include "yealink.h"
};

struct yealink_dev {
	struct input_dev *idev;		/* input device */
	struct usb_device *udev;	/* usb device */

	/* irq input channel */
	struct yld_ctl_packet	*irq_data;
	dma_addr_t		irq_dma;
	struct urb		*urb_irq;

	/* control output channel */
	struct yld_ctl_packet	*ctl_data;
	dma_addr_t		ctl_dma;
	struct usb_ctrlrequest	*ctl_req;
	dma_addr_t		ctl_req_dma;
	struct urb		*urb_ctl;

	char phys[64];			/* physical device path */

	u8 lcdMap[ARRAY_SIZE(lcdMap)];	/* state of LCD, LED ... */
	int key_code;			/* last reported key	 */

	unsigned int shutdown:1;

	int	stat_ix;
	union {
		struct yld_status s;
		u8		  b[sizeof(struct yld_status)];
	} master, copy;
};


/*******************************************************************************
 * Yealink lcd interface
 ******************************************************************************/

/*
 * Register a default 7 segment character set
 */
static SEG7_DEFAULT_MAP(map_seg7);

 /* Display a char,
  * char '\9' and '\n' are placeholders and do not overwrite the original text.
  * A space will always hide an icon.
  */
static int setChar(struct yealink_dev *yld, int el, int chr)
{
	int i, a, m, val;

	if (el >= ARRAY_SIZE(lcdMap))
		return -EINVAL;

	if (chr == '\t' || chr == '\n')
	    return 0;

	yld->lcdMap[el] = chr;

	if (lcdMap[el].type == '.') {
		a = lcdMap[el].u.p.a;
		m = lcdMap[el].u.p.m;
		if (chr != ' ')
			yld->master.b[a] |= m;
		else
			yld->master.b[a] &= ~m;
		return 0;
	}

	val = map_to_seg7(&map_seg7, chr);
	for (i = 0; i < ARRAY_SIZE(lcdMap[0].u.s); i++) {
		m = lcdMap[el].u.s[i].m;

		if (m == 0)
			continue;

		a = lcdMap[el].u.s[i].a;
		if (val & 1)
			yld->master.b[a] |= m;
		else
			yld->master.b[a] &= ~m;
		val = val >> 1;
	}
	return 0;
};

/*******************************************************************************
 * Yealink key interface
 ******************************************************************************/

/* Map device buttons to internal key events.
 *
 * USB-P1K button layout:
 *
 *             up
 *       IN           OUT
 *            down
 *
 *     pickup   C    hangup
 *       1      2      3
 *       4      5      6
 *       7      8      9
 *       *      0