302 lines
7.7 KiB
C
302 lines
7.7 KiB
C
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Siano Mobile Silicon, Inc.
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MDTV receiver kernel modules.
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Copyright (C) 2006-2009, Uri Shkolnik
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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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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************/
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#include <linux/types.h>
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#include <linux/input.h>
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#include "smscoreapi.h"
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#include "smsir.h"
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#include "sms-cards.h"
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/* In order to add new IR remote control -
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* 1) Add it to the <enum ir_kb_type> @ smsir,h,
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* 2) Add its map to keyboard_layout_maps below
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* 3) Set your board (sms-cards sub-module) to use it
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*/
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static struct keyboard_layout_map_t keyboard_layout_maps[] = {
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[SMS_IR_KB_DEFAULT_TV] = {
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.ir_protocol = IR_RC5,
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.rc5_kbd_address = KEYBOARD_ADDRESS_TV1,
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.keyboard_layout_map = {
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KEY_0, KEY_1, KEY_2,
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KEY_3, KEY_4, KEY_5,
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KEY_6, KEY_7, KEY_8,
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KEY_9, 0, 0, KEY_POWER,
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KEY_MUTE, 0, 0,
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KEY_VOLUMEUP, KEY_VOLUMEDOWN,
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KEY_BRIGHTNESSUP,
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KEY_BRIGHTNESSDOWN, KEY_CHANNELUP,
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KEY_CHANNELDOWN,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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}
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},
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[SMS_IR_KB_HCW_SILVER] = {
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.ir_protocol = IR_RC5,
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.rc5_kbd_address = KEYBOARD_ADDRESS_LIGHTING1,
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.keyboard_layout_map = {
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KEY_0, KEY_1, KEY_2,
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KEY_3, KEY_4, KEY_5,
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KEY_6, KEY_7, KEY_8,
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KEY_9, KEY_TEXT, KEY_RED,
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KEY_RADIO, KEY_MENU,
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KEY_SUBTITLE,
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KEY_MUTE, KEY_VOLUMEUP,
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KEY_VOLUMEDOWN, KEY_PREVIOUS, 0,
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KEY_UP, KEY_DOWN, KEY_LEFT,
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KEY_RIGHT, KEY_VIDEO, KEY_AUDIO,
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KEY_MHP, KEY_EPG, KEY_TV,
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0, KEY_NEXTSONG, KEY_EXIT,
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KEY_CHANNELUP, KEY_CHANNELDOWN,
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KEY_CHANNEL, 0,
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KEY_PREVIOUSSONG, KEY_ENTER,
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KEY_SLEEP, 0, 0, KEY_BLUE,
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0, 0, 0, 0, KEY_GREEN, 0,
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KEY_PAUSE, 0, KEY_REWIND,
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0, KEY_FASTFORWARD, KEY_PLAY,
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KEY_STOP, KEY_RECORD,
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KEY_YELLOW, 0, 0, KEY_SELECT,
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KEY_ZOOM, KEY_POWER, 0, 0
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}
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},
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{ } /* Terminating entry */
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};
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u32 ir_pos;
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u32 ir_word;
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u32 ir_toggle;
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#define RC5_PUSH_BIT(dst, bit, pos) \
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{ dst <<= 1; dst |= bit; pos++; }
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static void sms_ir_rc5_event(struct smscore_device_t *coredev,
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u32 toggle, u32 addr, u32 cmd)
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{
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bool toggle_changed;
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u16 keycode;
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sms_log("IR RC5 word: address %d, command %d, toggle %d",
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addr, cmd, toggle);
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toggle_changed = ir_toggle != toggle;
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/* keep toggle */
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ir_toggle = toggle;
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if (addr !=
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keyboard_layout_maps[coredev->ir.ir_kb_type].rc5_kbd_address)
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return; /* Check for valid address */
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keycode =
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keyboard_layout_maps
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[coredev->ir.ir_kb_type].keyboard_layout_map[cmd];
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if (!toggle_changed &&
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(keycode != KEY_VOLUMEUP && keycode != KEY_VOLUMEDOWN))
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return; /* accept only repeated volume, reject other keys */
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sms_log("kernel input keycode (from ir) %d", keycode);
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input_report_key(coredev->ir.input_dev, keycode, 1);
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input_sync(coredev->ir.input_dev);
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}
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/* decode raw bit pattern to RC5 code */
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/* taken from ir-functions.c */
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static u32 ir_rc5_decode(unsigned int code)
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{
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/* unsigned int org_code = code;*/
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unsigned int pair;
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unsigned int rc5 = 0;
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int i;
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for (i = 0; i < 14; ++i) {
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pair = code & 0x3;
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code >>= 2;
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rc5 <<= 1;
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switch (pair) {
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case 0:
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case 2:
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break;
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case 1:
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rc5 |= 1;
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break;
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case 3:
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/* dprintk(1, "ir-common: ir_rc5_decode(%x) bad code\n", org_code);*/
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sms_log("bad code");
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return 0;
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}
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}
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/*
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dprintk(1, "ir-common: code=%x, rc5=%x, start=%x,
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toggle=%x, address=%x, "
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"instr=%x\n", rc5, org_code, RC5_START(rc5),
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RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
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*/
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return rc5;
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}
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static void sms_rc5_parse_word(struct smscore_device_t *coredev)
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{
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#define RC5_START(x) (((x)>>12)&3)
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#define RC5_TOGGLE(x) (((x)>>11)&1)
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#define RC5_ADDR(x) (((x)>>6)&0x1F)
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#define RC5_INSTR(x) ((x)&0x3F)
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int i, j;
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u32 rc5_word = 0;
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/* Reverse the IR word direction */
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for (i = 0 ; i < 28 ; i++)
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RC5_PUSH_BIT(rc5_word, (ir_word>>i)&1, j)
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rc5_word = ir_rc5_decode(rc5_word);
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/* sms_log("temp = 0x%x, rc5_code = 0x%x", ir_word, rc5_word); */
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sms_ir_rc5_event(coredev,
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RC5_TOGGLE(rc5_word),
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RC5_ADDR(rc5_word),
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RC5_INSTR(rc5_word));
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}
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static void sms_rc5_accumulate_bits(struct smscore_device_t *coredev,
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s32 ir_sample)
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{
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#define RC5_TIME_GRANULARITY 200
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#define RC5_DEF_BIT_TIME 889
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#define RC5_MAX_SAME_BIT_CONT 4
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#define RC5_WORD_LEN 27 /* 28 bit */
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u32 i, j;
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s32 delta_time;
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u32 time = (ir_sample > 0) ? ir_sample : (0-ir_sample);
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u32 level = (ir_sample < 0) ? 0 : 1;
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for (i = RC5_MAX_SAME_BIT_CONT; i > 0; i--) {
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delta_time = time - (i*RC5_DEF_BIT_TIME) + RC5_TIME_GRANULARITY;
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if (delta_time < 0)
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continue; /* not so many consecutive bits */
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if (delta_time > (2 * RC5_TIME_GRANULARITY)) {
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/* timeout */
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if (ir_pos == (RC5_WORD_LEN-1))
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/* complete last bit */
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RC5_PUSH_BIT(ir_word, level, ir_pos)
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if (ir_pos == RC5_WORD_LEN)
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sms_rc5_parse_word(coredev);
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else if (ir_pos) /* timeout within a word */
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sms_log("IR error parsing a word");
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ir_pos = 0;
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ir_word = 0;
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/* sms_log("timeout %d", time); */
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break;
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}
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/* The time is within the range of this number of bits */
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for (j = 0 ; j < i ; j++)
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RC5_PUSH_BIT(ir_word, level, ir_pos)
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break;
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}
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}
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void sms_ir_event(struct smscore_device_t *coredev, const char *buf, int len)
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{
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#define IR_DATA_RECEIVE_MAX_LEN 520 /* 128*4 + 4 + 4 */
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u32 i;
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enum ir_protocol ir_protocol =
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keyboard_layout_maps[coredev->ir.ir_kb_type]
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.ir_protocol;
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s32 *samples;
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int count = len>>2;
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samples = (s32 *)buf;
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/* sms_log("IR buffer received, length = %d", count);*/
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for (i = 0; i < count; i++)
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if (ir_protocol == IR_RC5)
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sms_rc5_accumulate_bits(coredev, samples[i]);
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/* IR_RCMM not implemented */
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}
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int sms_ir_init(struct smscore_device_t *coredev)
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{
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struct input_dev *input_dev;
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sms_log("Allocating input device");
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input_dev = input_allocate_device();
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if (!input_dev) {
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sms_err("Not enough memory");
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return -ENOMEM;
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}
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coredev->ir.input_dev = input_dev;
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coredev->ir.ir_kb_type =
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sms_get_board(smscore_get_board_id(coredev))->ir_kb_type;
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coredev->ir.keyboard_layout_map =
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keyboard_layout_maps[coredev->ir.ir_kb_type].
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keyboard_layout_map;
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sms_log("IR remote keyboard type is %d", coredev->ir.ir_kb_type);
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coredev->ir.controller = 0; /* Todo: vega/nova SPI number */
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coredev->ir.timeout = IR_DEFAULT_TIMEOUT;
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sms_log("IR port %d, timeout %d ms",
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coredev->ir.controller, coredev->ir.timeout);
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snprintf(coredev->ir.name,
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IR_DEV_NAME_MAX_LEN,
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"SMS IR w/kbd type %d",
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coredev->ir.ir_kb_type);
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input_dev->name = coredev->ir.name;
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input_dev->phys = coredev->ir.name;
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input_dev->dev.parent = coredev->device;
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/* Key press events only */
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input_dev->evbit[0] = BIT_MASK(EV_KEY);
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input_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0);
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sms_log("Input device (IR) %s is set for key events", input_dev->name);
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if (input_register_device(input_dev)) {
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sms_err("Failed to register device");
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input_free_device(input_dev);
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return -EACCES;
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}
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return 0;
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}
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void sms_ir_exit(struct smscore_device_t *coredev)
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{
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if (coredev->ir.input_dev)
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input_unregister_device(coredev->ir.input_dev);
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sms_log("");
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}
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