Enable this option if you have an infrared remote control which
uses the Sony protocol, and you need software decoding support.
-config IR_RC5_SZ_DECODER
- tristate "Enable IR raw decoder for the RC-5 (streamzap) protocol"
- depends on RC_CORE
- select BITREVERSE
- default y
-
- ---help---
- Enable this option if you have IR with RC-5 (streamzap) protocol,
- and if the IR is decoded in software. (The Streamzap PC Remote
- uses an IR protocol that is almost standard RC-5, but not quite,
- as it uses an additional bit).
-
config IR_SANYO_DECODER
tristate "Enable IR raw decoder for the Sanyo protocol"
depends on RC_CORE
obj-$(CONFIG_IR_RC6_DECODER) += ir-rc6-decoder.o
obj-$(CONFIG_IR_JVC_DECODER) += ir-jvc-decoder.o
obj-$(CONFIG_IR_SONY_DECODER) += ir-sony-decoder.o
-obj-$(CONFIG_IR_RC5_SZ_DECODER) += ir-rc5-sz-decoder.o
obj-$(CONFIG_IR_SANYO_DECODER) += ir-sanyo-decoder.o
obj-$(CONFIG_IR_SHARP_DECODER) += ir-sharp-decoder.o
obj-$(CONFIG_IR_MCE_KBD_DECODER) += ir-mce_kbd-decoder.o
-/* ir-rc5-decoder.c - handle RC5(x) IR Pulse/Space protocol
+/* ir-rc5-decoder.c - decoder for RC5(x) and StreamZap protocols
*
* Copyright (C) 2010 by Mauro Carvalho Chehab
+ * Copyright (C) 2010 by Jarod Wilson <jarod@redhat.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
*/
/*
- * This code handles 14 bits RC5 protocols and 20 bits RC5x protocols.
- * There are other variants that use a different number of bits.
- * This is currently unsupported.
- * It considers a carrier of 36 kHz, with a total of 14/20 bits, where
- * the first two bits are start bits, and a third one is a filing bit
+ * This decoder handles the 14 bit RC5 protocol, 15 bit "StreamZap" protocol
+ * and 20 bit RC5x protocol.
*/
#include "rc-core-priv.h"
#include <linux/module.h>
#define RC5_NBITS 14
+#define RC5_SZ_NBITS 15
#define RC5X_NBITS 20
#define CHECK_RC5X_NBITS 8
#define RC5_UNIT 888888 /* ns */
#define RC5_BIT_START (1 * RC5_UNIT)
#define RC5_BIT_END (1 * RC5_UNIT)
#define RC5X_SPACE (4 * RC5_UNIT)
+#define RC5_TRAILER (10 * RC5_UNIT) /* In reality, approx 100 */
enum rc5_state {
STATE_INACTIVE,
goto out;
again:
- IR_dprintk(2, "RC5(x) decode started at state %i (%uus %s)\n",
+ IR_dprintk(2, "RC5(x/sz) decode started at state %i (%uus %s)\n",
data->state, TO_US(ev.duration), TO_STR(ev.pulse));
if (!geq_margin(ev.duration, RC5_UNIT, RC5_UNIT / 2))
data->state = STATE_BIT_START;
data->count = 1;
- /* We just need enough bits to get to STATE_CHECK_RC5X */
- data->wanted_bits = RC5X_NBITS;
decrease_duration(&ev, RC5_BIT_START);
goto again;
case STATE_BIT_START:
+ if (!ev.pulse && geq_margin(ev.duration, RC5_TRAILER, RC5_UNIT / 2)) {
+ data->state = STATE_FINISHED;
+ goto again;
+ }
+
if (!eq_margin(ev.duration, RC5_BIT_START, RC5_UNIT / 2))
break;
if (!is_transition(&ev, &dev->raw->prev_ev))
break;
- if (data->count == data->wanted_bits)
- data->state = STATE_FINISHED;
- else if (data->count == CHECK_RC5X_NBITS)
+ if (data->count == CHECK_RC5X_NBITS)
data->state = STATE_CHECK_RC5X;
else
data->state = STATE_BIT_START;
case STATE_CHECK_RC5X:
if (!ev.pulse && geq_margin(ev.duration, RC5X_SPACE, RC5_UNIT / 2)) {
- /* RC5X */
- data->wanted_bits = RC5X_NBITS;
+ data->is_rc5x = true;
decrease_duration(&ev, RC5X_SPACE);
- } else {
- /* RC5 */
- data->wanted_bits = RC5_NBITS;
- }
+ } else
+ data->is_rc5x = false;
data->state = STATE_BIT_START;
goto again;
if (ev.pulse)
break;
- if (data->wanted_bits == RC5X_NBITS) {
+ if (data->is_rc5x && data->count == RC5X_NBITS) {
/* RC5X */
u8 xdata, command, system;
if (!(dev->enabled_protocols & RC_BIT_RC5X)) {
scancode = system << 16 | command << 8 | xdata;
protocol = RC_TYPE_RC5X;
- IR_dprintk(1, "RC5X scancode 0x%06x (toggle: %u)\n",
- scancode, toggle);
-
- } else {
+ } else if (!data->is_rc5x && data->count == RC5_NBITS) {
/* RC5 */
u8 command, system;
if (!(dev->enabled_protocols & RC_BIT_RC5)) {
scancode = system << 8 | command;
protocol = RC_TYPE_RC5;
- IR_dprintk(1, "RC5 scancode 0x%04x (toggle: %u)\n",
- scancode, toggle);
- }
+ } else if (!data->is_rc5x && data->count == RC5_SZ_NBITS) {
+ /* RC5 StreamZap */
+ u8 command, system;
+ if (!(dev->enabled_protocols & RC_BIT_RC5_SZ)) {
+ data->state = STATE_INACTIVE;
+ return 0;
+ }
+ command = (data->bits & 0x0003F) >> 0;
+ system = (data->bits & 0x02FC0) >> 6;
+ toggle = (data->bits & 0x01000) ? 1 : 0;
+ scancode = system << 6 | command;
+ protocol = RC_TYPE_RC5_SZ;
+
+ } else
+ break;
+
+ IR_dprintk(1, "RC5(x/sz) scancode 0x%06x (p: %u, t: %u)\n",
+ scancode, protocol, toggle);
rc_keydown(dev, protocol, scancode, toggle);
data->state = STATE_INACTIVE;
}
out:
- IR_dprintk(1, "RC5(x) decode failed at state %i (%uus %s)\n",
+ IR_dprintk(1, "RC5(x/sz) decode failed at state %i (%uus %s)\n",
data->state, TO_US(ev.duration), TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}
static struct ir_raw_handler rc5_handler = {
- .protocols = RC_BIT_RC5 | RC_BIT_RC5X,
+ .protocols = RC_BIT_RC5 | RC_BIT_RC5X | RC_BIT_RC5_SZ,
.decode = ir_rc5_decode,
};
{
ir_raw_handler_register(&rc5_handler);
- printk(KERN_INFO "IR RC5(x) protocol handler initialized\n");
+ printk(KERN_INFO "IR RC5(x/sz) protocol handler initialized\n");
return 0;
}
module_exit(ir_rc5_decode_exit);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Mauro Carvalho Chehab");
+MODULE_AUTHOR("Mauro Carvalho Chehab and Jarod Wilson");
MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
-MODULE_DESCRIPTION("RC5(x) IR protocol decoder");
+MODULE_DESCRIPTION("RC5(x/sz) IR protocol decoder");
+++ /dev/null
-/* ir-rc5-sz-decoder.c - handle RC5 Streamzap IR Pulse/Space protocol
- *
- * Copyright (C) 2010 by Mauro Carvalho Chehab
- * Copyright (C) 2010 by Jarod Wilson <jarod@redhat.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 version 2 of the License.
- *
- * 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.
- */
-
-/*
- * This code handles the 15 bit RC5-ish protocol used by the Streamzap
- * PC Remote.
- * It considers a carrier of 36 kHz, with a total of 15 bits, where
- * the first two bits are start bits, and a third one is a filing bit
- */
-
-#include "rc-core-priv.h"
-#include <linux/module.h>
-
-#define RC5_SZ_NBITS 15
-#define RC5_UNIT 888888 /* ns */
-#define RC5_BIT_START (1 * RC5_UNIT)
-#define RC5_BIT_END (1 * RC5_UNIT)
-
-enum rc5_sz_state {
- STATE_INACTIVE,
- STATE_BIT_START,
- STATE_BIT_END,
- STATE_FINISHED,
-};
-
-/**
- * ir_rc5_sz_decode() - Decode one RC-5 Streamzap pulse or space
- * @dev: the struct rc_dev descriptor of the device
- * @ev: the struct ir_raw_event descriptor of the pulse/space
- *
- * This function returns -EINVAL if the pulse violates the state machine
- */
-static int ir_rc5_sz_decode(struct rc_dev *dev, struct ir_raw_event ev)
-{
- struct rc5_sz_dec *data = &dev->raw->rc5_sz;
- u8 toggle, command, system;
- u32 scancode;
-
- if (!(dev->enabled_protocols & RC_BIT_RC5_SZ))
- return 0;
-
- if (!is_timing_event(ev)) {
- if (ev.reset)
- data->state = STATE_INACTIVE;
- return 0;
- }
-
- if (!geq_margin(ev.duration, RC5_UNIT, RC5_UNIT / 2))
- goto out;
-
-again:
- IR_dprintk(2, "RC5-sz decode started at state %i (%uus %s)\n",
- data->state, TO_US(ev.duration), TO_STR(ev.pulse));
-
- if (!geq_margin(ev.duration, RC5_UNIT, RC5_UNIT / 2))
- return 0;
-
- switch (data->state) {
-
- case STATE_INACTIVE:
- if (!ev.pulse)
- break;
-
- data->state = STATE_BIT_START;
- data->count = 1;
- data->wanted_bits = RC5_SZ_NBITS;
- decrease_duration(&ev, RC5_BIT_START);
- goto again;
-
- case STATE_BIT_START:
- if (!eq_margin(ev.duration, RC5_BIT_START, RC5_UNIT / 2))
- break;
-
- data->bits <<= 1;
- if (!ev.pulse)
- data->bits |= 1;
- data->count++;
- data->state = STATE_BIT_END;
- return 0;
-
- case STATE_BIT_END:
- if (!is_transition(&ev, &dev->raw->prev_ev))
- break;
-
- if (data->count == data->wanted_bits)
- data->state = STATE_FINISHED;
- else
- data->state = STATE_BIT_START;
-
- decrease_duration(&ev, RC5_BIT_END);
- goto again;
-
- case STATE_FINISHED:
- if (ev.pulse)
- break;
-
- /* RC5-sz */
- command = (data->bits & 0x0003F) >> 0;
- system = (data->bits & 0x02FC0) >> 6;
- toggle = (data->bits & 0x01000) ? 1 : 0;
- scancode = system << 6 | command;
-
- IR_dprintk(1, "RC5-sz scancode 0x%04x (toggle: %u)\n",
- scancode, toggle);
-
- rc_keydown(dev, RC_TYPE_RC5_SZ, scancode, toggle);
- data->state = STATE_INACTIVE;
- return 0;
- }
-
-out:
- IR_dprintk(1, "RC5-sz decode failed at state %i (%uus %s)\n",
- data->state, TO_US(ev.duration), TO_STR(ev.pulse));
- data->state = STATE_INACTIVE;
- return -EINVAL;
-}
-
-static struct ir_raw_handler rc5_sz_handler = {
- .protocols = RC_BIT_RC5_SZ,
- .decode = ir_rc5_sz_decode,
-};
-
-static int __init ir_rc5_sz_decode_init(void)
-{
- ir_raw_handler_register(&rc5_sz_handler);
-
- printk(KERN_INFO "IR RC5 (streamzap) protocol handler initialized\n");
- return 0;
-}
-
-static void __exit ir_rc5_sz_decode_exit(void)
-{
- ir_raw_handler_unregister(&rc5_sz_handler);
-}
-
-module_init(ir_rc5_sz_decode_init);
-module_exit(ir_rc5_sz_decode_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
-MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
-MODULE_DESCRIPTION("RC5 (streamzap) IR protocol decoder");
static struct rc_map_table streamzap[] = {
/*
* The Streamzap remote is almost, but not quite, RC-5, as it has an extra
- * bit in it, which throws the in-kernel RC-5 decoder for a loop. Currently,
- * an additional RC-5-sz decoder is being deployed to support it, but it
- * may be possible to merge it back with the standard RC-5 decoder.
+ * bit in it.
*/
{ 0x28c0, KEY_NUMERIC_0 },
{ 0x28c1, KEY_NUMERIC_1 },
int state;
u32 bits;
unsigned count;
- unsigned wanted_bits;
+ bool is_rc5x;
} rc5;
struct rc6_dec {
int state;
bool first;
bool toggle;
} jvc;
- struct rc5_sz_dec {
- int state;
- u32 bits;
- unsigned count;
- unsigned wanted_bits;
- } rc5_sz;
struct sanyo_dec {
int state;
unsigned count;
/* number of samples buffered */
#define SZ_BUF_LEN 128
-/* from ir-rc5-sz-decoder.c */
-#ifdef CONFIG_IR_RC5_SZ_DECODER_MODULE
-#define load_rc5_sz_decode() request_module("ir-rc5-sz-decoder")
-#else
-#define load_rc5_sz_decode() {}
-#endif
-
enum StreamzapDecoderState {
PulseSpace,
FullPulse,
dev_info(sz->dev, "Registered %s on usb%d:%d\n", name,
usbdev->bus->busnum, usbdev->devnum);
- /* Load the streamzap not-quite-rc5 decoder too */
- load_rc5_sz_decode();
-
return 0;
rc_dev_fail:
projects / karo-tx-linux.git / commitdiff