![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
493 lines
11 KiB
C
493 lines
11 KiB
C
/*
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* $Id: ir-kbd-i2c.c,v 1.10 2004/12/09 12:51:35 kraxel Exp $
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*
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* keyboard input driver for i2c IR remote controls
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*
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* Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
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* modified for PixelView (BT878P+W/FM) by
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* Michal Kochanowicz <mkochano@pld.org.pl>
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* Christoph Bartelmus <lirc@bartelmus.de>
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* modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
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* Ulrich Mueller <ulrich.mueller42@web.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/workqueue.h>
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#include <asm/semaphore.h>
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#include <media/ir-common.h>
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/* Mark Phalan <phalanm@o2.ie> */
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static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
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[ 0 ] = KEY_KP0,
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[ 1 ] = KEY_KP1,
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[ 2 ] = KEY_KP2,
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[ 3 ] = KEY_KP3,
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[ 4 ] = KEY_KP4,
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[ 5 ] = KEY_KP5,
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[ 6 ] = KEY_KP6,
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[ 7 ] = KEY_KP7,
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[ 8 ] = KEY_KP8,
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[ 9 ] = KEY_KP9,
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[ 18 ] = KEY_POWER,
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[ 16 ] = KEY_MUTE,
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[ 31 ] = KEY_VOLUMEDOWN,
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[ 27 ] = KEY_VOLUMEUP,
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[ 26 ] = KEY_CHANNELUP,
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[ 30 ] = KEY_CHANNELDOWN,
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[ 14 ] = KEY_PAGEUP,
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[ 29 ] = KEY_PAGEDOWN,
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[ 19 ] = KEY_SOUND,
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[ 24 ] = KEY_KPPLUSMINUS, // CH +/-
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[ 22 ] = KEY_SUBTITLE, // CC
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[ 13 ] = KEY_TEXT, // TTX
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[ 11 ] = KEY_TV, // AIR/CBL
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[ 17 ] = KEY_PC, // PC/TV
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[ 23 ] = KEY_OK, // CH RTN
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[ 25 ] = KEY_MODE, // FUNC
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[ 12 ] = KEY_SEARCH, // AUTOSCAN
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/* Not sure what to do with these ones! */
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[ 15 ] = KEY_SELECT, // SOURCE
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[ 10 ] = KEY_KPPLUS, // +100
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[ 20 ] = KEY_KPEQUAL, // SYNC
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[ 28 ] = KEY_MEDIA, // PC/TV
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};
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static IR_KEYTAB_TYPE ir_codes_purpletv[IR_KEYTAB_SIZE] = {
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[ 0x3 ] = KEY_POWER,
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[ 0x6f ] = KEY_MUTE,
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[ 0x10 ] = KEY_BACKSPACE, // Recall
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[ 0x11 ] = KEY_KP0,
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[ 0x4 ] = KEY_KP1,
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[ 0x5 ] = KEY_KP2,
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[ 0x6 ] = KEY_KP3,
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[ 0x8 ] = KEY_KP4,
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[ 0x9 ] = KEY_KP5,
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[ 0xa ] = KEY_KP6,
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[ 0xc ] = KEY_KP7,
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[ 0xd ] = KEY_KP8,
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[ 0xe ] = KEY_KP9,
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[ 0x12 ] = KEY_KPDOT, // 100+
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[ 0x7 ] = KEY_VOLUMEUP,
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[ 0xb ] = KEY_VOLUMEDOWN,
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[ 0x1a ] = KEY_KPPLUS,
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[ 0x18 ] = KEY_KPMINUS,
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[ 0x15 ] = KEY_UP,
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[ 0x1d ] = KEY_DOWN,
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[ 0xf ] = KEY_CHANNELUP,
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[ 0x13 ] = KEY_CHANNELDOWN,
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[ 0x48 ] = KEY_ZOOM,
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[ 0x1b ] = KEY_VIDEO, // Video source
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#if 0
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[ 0x1f ] = KEY_S, // Snapshot
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#endif
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[ 0x49 ] = KEY_LANGUAGE, // MTS Select
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[ 0x19 ] = KEY_SEARCH, // Auto Scan
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[ 0x4b ] = KEY_RECORD,
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[ 0x46 ] = KEY_PLAY,
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[ 0x45 ] = KEY_PAUSE, // Pause
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[ 0x44 ] = KEY_STOP,
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#if 0
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[ 0x43 ] = KEY_T, // Time Shift
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[ 0x47 ] = KEY_Y, // Time Shift OFF
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[ 0x4a ] = KEY_O, // TOP
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[ 0x17 ] = KEY_F, // SURF CH
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#endif
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[ 0x40 ] = KEY_FORWARD, // Forward ?
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[ 0x42 ] = KEY_REWIND, // Backward ?
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};
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struct IR;
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struct IR {
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struct i2c_client c;
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struct input_dev input;
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struct ir_input_state ir;
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struct work_struct work;
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struct timer_list timer;
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char phys[32];
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int (*get_key)(struct IR*, u32*, u32*);
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};
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/* ----------------------------------------------------------------------- */
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/* insmod parameters */
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static int debug;
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module_param(debug, int, 0644); /* debug level (0,1,2) */
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#define DEVNAME "ir-kbd-i2c"
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#define dprintk(level, fmt, arg...) if (debug >= level) \
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printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
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/* ----------------------------------------------------------------------- */
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static int get_key_haup(struct IR *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char buf[3];
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int start, toggle, dev, code;
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/* poll IR chip */
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if (3 != i2c_master_recv(&ir->c,buf,3))
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return -EIO;
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/* split rc5 data block ... */
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start = (buf[0] >> 6) & 3;
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toggle = (buf[0] >> 5) & 1;
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dev = buf[0] & 0x1f;
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code = (buf[1] >> 2) & 0x3f;
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if (3 != start)
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/* no key pressed */
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return 0;
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dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
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start, toggle, dev, code);
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/* return key */
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*ir_key = code;
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*ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
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return 1;
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}
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static int get_key_pixelview(struct IR *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(&ir->c,&b,1)) {
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dprintk(1,"read error\n");
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return -EIO;
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}
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*ir_key = b;
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*ir_raw = b;
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return 1;
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}
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static int get_key_pv951(struct IR *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(&ir->c,&b,1)) {
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dprintk(1,"read error\n");
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return -EIO;
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}
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/* ignore 0xaa */
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if (b==0xaa)
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return 0;
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dprintk(2,"key %02x\n", b);
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*ir_key = b;
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*ir_raw = b;
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return 1;
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}
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static int get_key_knc1(struct IR *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(&ir->c,&b,1)) {
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dprintk(1,"read error\n");
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return -EIO;
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}
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/* it seems that 0xFE indicates that a button is still hold
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down, while 0xFF indicates that no button is hold
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down. 0xFE sequences are sometimes interrupted by 0xFF */
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dprintk(2,"key %02x\n", b);
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if (b == 0xFF)
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return 0;
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if (b == 0xFE)
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/* keep old data */
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return 1;
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*ir_key = b;
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*ir_raw = b;
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return 1;
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}
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static int get_key_purpletv(struct IR *ir, u32 *ir_key, u32 *ir_raw)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(&ir->c,&b,1)) {
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dprintk(1,"read error\n");
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return -EIO;
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}
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/* no button press */
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if (b==0)
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return 0;
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/* repeating */
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if (b & 0x80)
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return 1;
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*ir_key = b;
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*ir_raw = b;
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return 1;
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}
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/* ----------------------------------------------------------------------- */
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static void ir_key_poll(struct IR *ir)
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{
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static u32 ir_key, ir_raw;
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int rc;
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dprintk(2,"ir_poll_key\n");
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rc = ir->get_key(ir, &ir_key, &ir_raw);
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if (rc < 0) {
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dprintk(2,"error\n");
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return;
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}
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if (0 == rc) {
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ir_input_nokey(&ir->input,&ir->ir);
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} else {
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ir_input_keydown(&ir->input,&ir->ir, ir_key, ir_raw);
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}
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}
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static void ir_timer(unsigned long data)
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{
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struct IR *ir = (struct IR*)data;
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schedule_work(&ir->work);
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}
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static void ir_work(void *data)
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{
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struct IR *ir = data;
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ir_key_poll(ir);
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mod_timer(&ir->timer, jiffies+HZ/10);
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}
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/* ----------------------------------------------------------------------- */
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static int ir_attach(struct i2c_adapter *adap, int addr,
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unsigned short flags, int kind);
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static int ir_detach(struct i2c_client *client);
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static int ir_probe(struct i2c_adapter *adap);
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static struct i2c_driver driver = {
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.name = "ir remote kbd driver",
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.id = I2C_DRIVERID_EXP3, /* FIXME */
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.flags = I2C_DF_NOTIFY,
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.attach_adapter = ir_probe,
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.detach_client = ir_detach,
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};
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static struct i2c_client client_template =
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{
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I2C_DEVNAME("unset"),
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.driver = &driver
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};
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static int ir_attach(struct i2c_adapter *adap, int addr,
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unsigned short flags, int kind)
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{
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IR_KEYTAB_TYPE *ir_codes = NULL;
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char *name;
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int ir_type;
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struct IR *ir;
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if (NULL == (ir = kmalloc(sizeof(struct IR),GFP_KERNEL)))
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return -ENOMEM;
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memset(ir,0,sizeof(*ir));
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ir->c = client_template;
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i2c_set_clientdata(&ir->c, ir);
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ir->c.adapter = adap;
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ir->c.addr = addr;
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switch(addr) {
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case 0x64:
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name = "Pixelview";
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ir->get_key = get_key_pixelview;
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ir_type = IR_TYPE_OTHER;
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ir_codes = ir_codes_empty;
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break;
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case 0x4b:
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name = "PV951";
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ir->get_key = get_key_pv951;
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ir_type = IR_TYPE_OTHER;
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ir_codes = ir_codes_pv951;
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break;
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case 0x18:
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case 0x1a:
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name = "Hauppauge";
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ir->get_key = get_key_haup;
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ir_type = IR_TYPE_RC5;
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ir_codes = ir_codes_rc5_tv;
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break;
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case 0x30:
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name = "KNC One";
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ir->get_key = get_key_knc1;
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ir_type = IR_TYPE_OTHER;
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ir_codes = ir_codes_empty;
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break;
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case 0x7a:
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name = "Purple TV";
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ir->get_key = get_key_purpletv;
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ir_type = IR_TYPE_OTHER;
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ir_codes = ir_codes_purpletv;
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break;
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default:
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/* shouldn't happen */
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printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
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kfree(ir);
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return -1;
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}
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/* register i2c device */
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i2c_attach_client(&ir->c);
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snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
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snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
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ir->c.adapter->dev.bus_id,
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ir->c.dev.bus_id);
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/* init + register input device */
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ir_input_init(&ir->input,&ir->ir,ir_type,ir_codes);
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ir->input.id.bustype = BUS_I2C;
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ir->input.name = ir->c.name;
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ir->input.phys = ir->phys;
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input_register_device(&ir->input);
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printk(DEVNAME ": %s detected at %s [%s]\n",
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ir->input.name,ir->input.phys,adap->name);
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/* start polling via eventd */
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INIT_WORK(&ir->work, ir_work, ir);
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init_timer(&ir->timer);
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ir->timer.function = ir_timer;
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ir->timer.data = (unsigned long)ir;
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schedule_work(&ir->work);
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return 0;
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}
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static int ir_detach(struct i2c_client *client)
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{
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struct IR *ir = i2c_get_clientdata(client);
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/* kill outstanding polls */
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del_timer(&ir->timer);
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flush_scheduled_work();
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/* unregister devices */
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input_unregister_device(&ir->input);
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i2c_detach_client(&ir->c);
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/* free memory */
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kfree(ir);
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return 0;
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}
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static int ir_probe(struct i2c_adapter *adap)
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{
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/* The external IR receiver is at i2c address 0x34 (0x35 for
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reads). Future Hauppauge cards will have an internal
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receiver at 0x30 (0x31 for reads). In theory, both can be
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fitted, and Hauppauge suggest an external overrides an
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internal.
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That's why we probe 0x1a (~0x34) first. CB
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*/
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static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
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static const int probe_saa7134[] = { 0x7a, -1 };
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const int *probe = NULL;
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struct i2c_client c; char buf; int i,rc;
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switch (adap->id) {
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case I2C_ALGO_BIT | I2C_HW_B_BT848:
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probe = probe_bttv;
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break;
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case I2C_ALGO_SAA7134:
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probe = probe_saa7134;
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break;
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}
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if (NULL == probe)
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return 0;
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memset(&c,0,sizeof(c));
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c.adapter = adap;
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for (i = 0; -1 != probe[i]; i++) {
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c.addr = probe[i];
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rc = i2c_master_recv(&c,&buf,1);
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dprintk(1,"probe 0x%02x @ %s: %s\n",
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probe[i], adap->name,
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(1 == rc) ? "yes" : "no");
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if (1 == rc) {
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ir_attach(adap,probe[i],0,0);
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break;
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}
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}
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
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MODULE_DESCRIPTION("input driver for i2c IR remote controls");
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MODULE_LICENSE("GPL");
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static int __init ir_init(void)
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{
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return i2c_add_driver(&driver);
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}
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static void __exit ir_fini(void)
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{
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i2c_del_driver(&driver);
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}
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module_init(ir_init);
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module_exit(ir_fini);
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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