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path: root/drivers/media/rc/ir-sanyo-decoder.c
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Diffstat (limited to 'drivers/media/rc/ir-sanyo-decoder.c')
-rw-r--r--drivers/media/rc/ir-sanyo-decoder.c126
1 files changed, 78 insertions, 48 deletions
diff --git a/drivers/media/rc/ir-sanyo-decoder.c b/drivers/media/rc/ir-sanyo-decoder.c
index 0a06205b5677..2bc98c342882 100644
--- a/drivers/media/rc/ir-sanyo-decoder.c
+++ b/drivers/media/rc/ir-sanyo-decoder.c
@@ -1,32 +1,23 @@
-/* ir-sanyo-decoder.c - handle SANYO IR Pulse/Space protocol
- *
- * Copyright (C) 2011 by Mauro Carvalho Chehab <mchehab@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 protocol uses the NEC protocol timings. However, data is formatted as:
- * 13 bits Custom Code
- * 13 bits NOT(Custom Code)
- * 8 bits Key data
- * 8 bits NOT(Key data)
- *
- * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
- * Information for this protocol is available at the Sanyo LC7461 datasheet.
- */
+// SPDX-License-Identifier: GPL-2.0
+// ir-sanyo-decoder.c - handle SANYO IR Pulse/Space protocol
+//
+// Copyright (C) 2011 by Mauro Carvalho Chehab
+//
+// This protocol uses the NEC protocol timings. However, data is formatted as:
+// 13 bits Custom Code
+// 13 bits NOT(Custom Code)
+// 8 bits Key data
+// 8 bits NOT(Key data)
+//
+// According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
+// Information for this protocol is available at the Sanyo LC7461 datasheet.
#include <linux/module.h>
#include <linux/bitrev.h>
#include "rc-core-priv.h"
#define SANYO_NBITS (13+13+8+8)
-#define SANYO_UNIT 562500 /* ns */
+#define SANYO_UNIT 563 /* us */
#define SANYO_HEADER_PULSE (16 * SANYO_UNIT)
#define SANYO_HEADER_SPACE (8 * SANYO_UNIT)
#define SANYO_BIT_PULSE (1 * SANYO_UNIT)
@@ -48,7 +39,7 @@ enum sanyo_state {
/**
* ir_sanyo_decode() - Decode one SANYO pulse or space
* @dev: the struct rc_dev descriptor of the device
- * @duration: the struct ir_raw_event descriptor of the pulse/space
+ * @ev: the struct ir_raw_event descriptor of the pulse/space
*
* This function returns -EINVAL if the pulse violates the state machine
*/
@@ -56,21 +47,19 @@ static int ir_sanyo_decode(struct rc_dev *dev, struct ir_raw_event ev)
{
struct sanyo_dec *data = &dev->raw->sanyo;
u32 scancode;
- u8 address, command, not_command;
-
- if (!(dev->enabled_protocols & RC_BIT_SANYO))
- return 0;
+ u16 address;
+ u8 command, not_command;
if (!is_timing_event(ev)) {
- if (ev.reset) {
- IR_dprintk(1, "SANYO event reset received. reset to state 0\n");
+ if (ev.overflow) {
+ dev_dbg(&dev->dev, "SANYO event overflow received. reset to state 0\n");
data->state = STATE_INACTIVE;
}
return 0;
}
- IR_dprintk(2, "SANYO decode started at state %d (%uus %s)\n",
- data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+ dev_dbg(&dev->dev, "SANYO decode started at state %d (%uus %s)\n",
+ data->state, ev.duration, TO_STR(ev.pulse));
switch (data->state) {
@@ -112,13 +101,9 @@ static int ir_sanyo_decode(struct rc_dev *dev, struct ir_raw_event ev)
break;
if (!data->count && geq_margin(ev.duration, SANYO_REPEAT_SPACE, SANYO_UNIT / 2)) {
- if (!dev->keypressed) {
- IR_dprintk(1, "SANYO discarding last key repeat: event after key up\n");
- } else {
- rc_repeat(dev);
- IR_dprintk(1, "SANYO repeat last key\n");
- data->state = STATE_INACTIVE;
- }
+ rc_repeat(dev);
+ dev_dbg(&dev->dev, "SANYO repeat last key\n");
+ data->state = STATE_INACTIVE;
return 0;
}
@@ -159,28 +144,73 @@ static int ir_sanyo_decode(struct rc_dev *dev, struct ir_raw_event ev)
not_command = bitrev8((data->bits >> 0) & 0xff);
if ((command ^ not_command) != 0xff) {
- IR_dprintk(1, "SANYO checksum error: received 0x%08Lx\n",
- data->bits);
+ dev_dbg(&dev->dev, "SANYO checksum error: received 0x%08llx\n",
+ data->bits);
data->state = STATE_INACTIVE;
return 0;
}
scancode = address << 8 | command;
- IR_dprintk(1, "SANYO scancode: 0x%06x\n", scancode);
- rc_keydown(dev, scancode, 0);
+ dev_dbg(&dev->dev, "SANYO scancode: 0x%06x\n", scancode);
+ rc_keydown(dev, RC_PROTO_SANYO, scancode, 0);
data->state = STATE_INACTIVE;
return 0;
}
- IR_dprintk(1, "SANYO decode failed at count %d state %d (%uus %s)\n",
- data->count, data->state, TO_US(ev.duration), TO_STR(ev.pulse));
+ dev_dbg(&dev->dev, "SANYO decode failed at count %d state %d (%uus %s)\n",
+ data->count, data->state, ev.duration, TO_STR(ev.pulse));
data->state = STATE_INACTIVE;
return -EINVAL;
}
+static const struct ir_raw_timings_pd ir_sanyo_timings = {
+ .header_pulse = SANYO_HEADER_PULSE,
+ .header_space = SANYO_HEADER_SPACE,
+ .bit_pulse = SANYO_BIT_PULSE,
+ .bit_space[0] = SANYO_BIT_0_SPACE,
+ .bit_space[1] = SANYO_BIT_1_SPACE,
+ .trailer_pulse = SANYO_TRAILER_PULSE,
+ .trailer_space = SANYO_TRAILER_SPACE,
+ .msb_first = 1,
+};
+
+/**
+ * ir_sanyo_encode() - Encode a scancode as a stream of raw events
+ *
+ * @protocol: protocol to encode
+ * @scancode: scancode to encode
+ * @events: array of raw ir events to write into
+ * @max: maximum size of @events
+ *
+ * Returns: The number of events written.
+ * -ENOBUFS if there isn't enough space in the array to fit the
+ * encoding. In this case all @max events will have been written.
+ */
+static int ir_sanyo_encode(enum rc_proto protocol, u32 scancode,
+ struct ir_raw_event *events, unsigned int max)
+{
+ struct ir_raw_event *e = events;
+ int ret;
+ u64 raw;
+
+ raw = ((u64)(bitrev16(scancode >> 8) & 0xfff8) << (8 + 8 + 13 - 3)) |
+ ((u64)(bitrev16(~scancode >> 8) & 0xfff8) << (8 + 8 + 0 - 3)) |
+ ((bitrev8(scancode) & 0xff) << 8) |
+ (bitrev8(~scancode) & 0xff);
+
+ ret = ir_raw_gen_pd(&e, max, &ir_sanyo_timings, SANYO_NBITS, raw);
+ if (ret < 0)
+ return ret;
+
+ return e - events;
+}
+
static struct ir_raw_handler sanyo_handler = {
- .protocols = RC_BIT_SANYO,
+ .protocols = RC_PROTO_BIT_SANYO,
.decode = ir_sanyo_decode,
+ .encode = ir_sanyo_encode,
+ .carrier = 38000,
+ .min_timeout = SANYO_TRAILER_SPACE,
};
static int __init ir_sanyo_decode_init(void)
@@ -199,7 +229,7 @@ static void __exit ir_sanyo_decode_exit(void)
module_init(ir_sanyo_decode_init);
module_exit(ir_sanyo_decode_exit);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
MODULE_DESCRIPTION("SANYO IR protocol decoder");
generated by cgit (git 2.34.1) at 2025-12-26 02:01:27 +0000