summaryrefslogtreecommitdiff
path: root/drivers/media/rc/ir-rc5-decoder.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/rc/ir-rc5-decoder.c')
-rw-r--r--drivers/media/rc/ir-rc5-decoder.c89
1 files changed, 40 insertions, 49 deletions
diff --git a/drivers/media/rc/ir-rc5-decoder.c b/drivers/media/rc/ir-rc5-decoder.c
index fcfedf95def7..82d7f6ad2338 100644
--- a/drivers/media/rc/ir-rc5-decoder.c
+++ b/drivers/media/rc/ir-rc5-decoder.c
@@ -1,17 +1,8 @@
-/* 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
- * 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.
- */
+// SPDX-License-Identifier: GPL-2.0
+// 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 decoder handles the 14 bit RC5 protocol, 15 bit "StreamZap" protocol
@@ -25,7 +16,7 @@
#define RC5_SZ_NBITS 15
#define RC5X_NBITS 20
#define CHECK_RC5X_NBITS 8
-#define RC5_UNIT 888888 /* ns */
+#define RC5_UNIT 889 /* us */
#define RC5_BIT_START (1 * RC5_UNIT)
#define RC5_BIT_END (1 * RC5_UNIT)
#define RC5X_SPACE (4 * RC5_UNIT)
@@ -51,10 +42,10 @@ static int ir_rc5_decode(struct rc_dev *dev, struct ir_raw_event ev)
struct rc5_dec *data = &dev->raw->rc5;
u8 toggle;
u32 scancode;
- enum rc_type protocol;
+ enum rc_proto protocol;
if (!is_timing_event(ev)) {
- if (ev.reset)
+ if (ev.overflow)
data->state = STATE_INACTIVE;
return 0;
}
@@ -63,8 +54,8 @@ static int ir_rc5_decode(struct rc_dev *dev, struct ir_raw_event ev)
goto out;
again:
- IR_dprintk(2, "RC5(x/sz) decode started at state %i (%uus %s)\n",
- data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+ dev_dbg(&dev->dev, "RC5(x/sz) decode started at state %i (%uus %s)\n",
+ data->state, ev.duration, TO_STR(ev.pulse));
if (!geq_margin(ev.duration, RC5_UNIT, RC5_UNIT / 2))
return 0;
@@ -97,9 +88,6 @@ again:
return 0;
case STATE_BIT_END:
- if (!is_transition(&ev, &dev->raw->prev_ev))
- break;
-
if (data->count == CHECK_RC5X_NBITS)
data->state = STATE_CHECK_RC5X;
else
@@ -124,7 +112,7 @@ again:
if (data->is_rc5x && data->count == RC5X_NBITS) {
/* RC5X */
u8 xdata, command, system;
- if (!(dev->enabled_protocols & RC_BIT_RC5X_20)) {
+ if (!(dev->enabled_protocols & RC_PROTO_BIT_RC5X_20)) {
data->state = STATE_INACTIVE;
return 0;
}
@@ -134,12 +122,12 @@ again:
toggle = (data->bits & 0x20000) ? 1 : 0;
command += (data->bits & 0x40000) ? 0 : 0x40;
scancode = system << 16 | command << 8 | xdata;
- protocol = RC_TYPE_RC5X_20;
+ protocol = RC_PROTO_RC5X_20;
} else if (!data->is_rc5x && data->count == RC5_NBITS) {
/* RC5 */
u8 command, system;
- if (!(dev->enabled_protocols & RC_BIT_RC5)) {
+ if (!(dev->enabled_protocols & RC_PROTO_BIT_RC5)) {
data->state = STATE_INACTIVE;
return 0;
}
@@ -148,12 +136,12 @@ again:
toggle = (data->bits & 0x00800) ? 1 : 0;
command += (data->bits & 0x01000) ? 0 : 0x40;
scancode = system << 8 | command;
- protocol = RC_TYPE_RC5;
+ protocol = RC_PROTO_RC5;
} else if (!data->is_rc5x && data->count == RC5_SZ_NBITS) {
/* RC5 StreamZap */
u8 command, system;
- if (!(dev->enabled_protocols & RC_BIT_RC5_SZ)) {
+ if (!(dev->enabled_protocols & RC_PROTO_BIT_RC5_SZ)) {
data->state = STATE_INACTIVE;
return 0;
}
@@ -161,13 +149,13 @@ again:
system = (data->bits & 0x02FC0) >> 6;
toggle = (data->bits & 0x01000) ? 1 : 0;
scancode = system << 6 | command;
- protocol = RC_TYPE_RC5_SZ;
+ protocol = RC_PROTO_RC5_SZ;
} else
break;
- IR_dprintk(1, "RC5(x/sz) scancode 0x%06x (p: %u, t: %u)\n",
- scancode, protocol, toggle);
+ dev_dbg(&dev->dev, "RC5(x/sz) scancode 0x%06x (p: %u, t: %u)\n",
+ scancode, protocol, toggle);
rc_keydown(dev, protocol, scancode, toggle);
data->state = STATE_INACTIVE;
@@ -175,23 +163,21 @@ again:
}
out:
- IR_dprintk(1, "RC5(x/sz) decode failed at state %i count %d (%uus %s)\n",
- data->state, data->count, TO_US(ev.duration), TO_STR(ev.pulse));
+ dev_dbg(&dev->dev, "RC5(x/sz) decode failed at state %i count %d (%uus %s)\n",
+ data->state, data->count, ev.duration, TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}
static const struct ir_raw_timings_manchester ir_rc5_timings = {
- .leader = RC5_UNIT,
- .pulse_space_start = 0,
+ .leader_pulse = RC5_UNIT,
.clock = RC5_UNIT,
.trailer_space = RC5_UNIT * 10,
};
static const struct ir_raw_timings_manchester ir_rc5x_timings[2] = {
{
- .leader = RC5_UNIT,
- .pulse_space_start = 0,
+ .leader_pulse = RC5_UNIT,
.clock = RC5_UNIT,
.trailer_space = RC5X_SPACE,
},
@@ -202,8 +188,7 @@ static const struct ir_raw_timings_manchester ir_rc5x_timings[2] = {
};
static const struct ir_raw_timings_manchester ir_rc5_sz_timings = {
- .leader = RC5_UNIT,
- .pulse_space_start = 0,
+ .leader_pulse = RC5_UNIT,
.clock = RC5_UNIT,
.trailer_space = RC5_UNIT * 10,
};
@@ -221,7 +206,7 @@ static const struct ir_raw_timings_manchester ir_rc5_sz_timings = {
* encoding. In this case all @max events will have been written.
* -EINVAL if the scancode is ambiguous or invalid.
*/
-static int ir_rc5_encode(enum rc_type protocol, u32 scancode,
+static int ir_rc5_encode(enum rc_proto protocol, u32 scancode,
struct ir_raw_event *events, unsigned int max)
{
int ret;
@@ -229,7 +214,7 @@ static int ir_rc5_encode(enum rc_type protocol, u32 scancode,
unsigned int data, xdata, command, commandx, system, pre_space_data;
/* Detect protocol and convert scancode to raw data */
- if (protocol == RC_TYPE_RC5) {
+ if (protocol == RC_PROTO_RC5) {
/* decode scancode */
command = (scancode & 0x003f) >> 0;
commandx = (scancode & 0x0040) >> 6;
@@ -237,12 +222,12 @@ static int ir_rc5_encode(enum rc_type protocol, u32 scancode,
/* encode data */
data = !commandx << 12 | system << 6 | command;
- /* Modulate the data */
+ /* First bit is encoded by leader_pulse */
ret = ir_raw_gen_manchester(&e, max, &ir_rc5_timings,
- RC5_NBITS, data);
+ RC5_NBITS - 1, data);
if (ret < 0)
return ret;
- } else if (protocol == RC_TYPE_RC5X_20) {
+ } else if (protocol == RC_PROTO_RC5X_20) {
/* decode scancode */
xdata = (scancode & 0x00003f) >> 0;
command = (scancode & 0x003f00) >> 8;
@@ -252,10 +237,11 @@ static int ir_rc5_encode(enum rc_type protocol, u32 scancode,
/* encode data */
data = commandx << 18 | system << 12 | command << 6 | xdata;
- /* Modulate the data */
+ /* First bit is encoded by leader_pulse */
pre_space_data = data >> (RC5X_NBITS - CHECK_RC5X_NBITS);
ret = ir_raw_gen_manchester(&e, max, &ir_rc5x_timings[0],
- CHECK_RC5X_NBITS, pre_space_data);
+ CHECK_RC5X_NBITS - 1,
+ pre_space_data);
if (ret < 0)
return ret;
ret = ir_raw_gen_manchester(&e, max - (e - events),
@@ -264,10 +250,12 @@ static int ir_rc5_encode(enum rc_type protocol, u32 scancode,
data);
if (ret < 0)
return ret;
- } else if (protocol == RC_TYPE_RC5_SZ) {
+ } else if (protocol == RC_PROTO_RC5_SZ) {
/* RC5-SZ scancode is raw enough for Manchester as it is */
+ /* First bit is encoded by leader_pulse */
ret = ir_raw_gen_manchester(&e, max, &ir_rc5_sz_timings,
- RC5_SZ_NBITS, scancode & 0x2fff);
+ RC5_SZ_NBITS - 1,
+ scancode & 0x2fff);
if (ret < 0)
return ret;
} else {
@@ -278,9 +266,12 @@ static int ir_rc5_encode(enum rc_type protocol, u32 scancode,
}
static struct ir_raw_handler rc5_handler = {
- .protocols = RC_BIT_RC5 | RC_BIT_RC5X_20 | RC_BIT_RC5_SZ,
+ .protocols = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC5X_20 |
+ RC_PROTO_BIT_RC5_SZ,
.decode = ir_rc5_decode,
.encode = ir_rc5_encode,
+ .carrier = 36000,
+ .min_timeout = RC5_TRAILER,
};
static int __init ir_rc5_decode_init(void)
@@ -299,7 +290,7 @@ static void __exit ir_rc5_decode_exit(void)
module_init(ir_rc5_decode_init);
module_exit(ir_rc5_decode_exit);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Mauro Carvalho Chehab and Jarod Wilson");
MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
MODULE_DESCRIPTION("RC5(x/sz) IR protocol decoder");
generated by cgit (git 2.34.1) at 2025-12-25 16:51:34 +0000