This is an automatic generated email to let you know that the following patch were queued at the http://git.linuxtv.org/media_tree.git tree: Subject: [media] media: rc: add raw decoder for Sharp protocol Author: James Hogan <james.hogan@xxxxxxxxxx> Date: Fri Jan 17 10:58:48 2014 -0300 Add a raw decoder for the Sharp protocol. It uses a pulse distance modulation with a pulse of 320us and a bit period of 2ms for a logical 1 and 1ms for a logical 0. The first part of the message consists of a 5-bit address, an 8-bit command, and two other bits, followed by a 40ms gap before the echo message which is an inverted version of the main message except for the address bits. Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx> Cc: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx> Cc: linux-media@xxxxxxxxxxxxxxx Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx> drivers/media/rc/Kconfig | 9 ++ drivers/media/rc/Makefile | 1 + drivers/media/rc/ir-sharp-decoder.c | 200 +++++++++++++++++++++++++++++++++++ drivers/media/rc/rc-core-priv.h | 6 + 4 files changed, 216 insertions(+), 0 deletions(-) --- http://git.linuxtv.org/media_tree.git?a=commitdiff;h=1d184b0bc13d49108e571033fc00f3b5f32670e1 diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig index 904f113..3b25887 100644 --- a/drivers/media/rc/Kconfig +++ b/drivers/media/rc/Kconfig @@ -106,6 +106,15 @@ config IR_SANYO_DECODER uses the Sanyo protocol (Sanyo, Aiwa, Chinon remotes), and you need software decoding support. +config IR_SHARP_DECODER + tristate "Enable IR raw decoder for the Sharp protocol" + depends on RC_CORE + default y + + ---help--- + Enable this option if you have an infrared remote control which + uses the Sharp protocol, and you need software decoding support. + config IR_MCE_KBD_DECODER tristate "Enable IR raw decoder for the MCE keyboard/mouse protocol" depends on RC_CORE diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile index f4eb32c..36dafed 100644 --- a/drivers/media/rc/Makefile +++ b/drivers/media/rc/Makefile @@ -11,6 +11,7 @@ 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 obj-$(CONFIG_IR_LIRC_CODEC) += ir-lirc-codec.o diff --git a/drivers/media/rc/ir-sharp-decoder.c b/drivers/media/rc/ir-sharp-decoder.c new file mode 100644 index 0000000..4c17be5 --- /dev/null +++ b/drivers/media/rc/ir-sharp-decoder.c @@ -0,0 +1,200 @@ +/* ir-sharp-decoder.c - handle Sharp IR Pulse/Space protocol + * + * Copyright (C) 2013-2014 Imagination Technologies Ltd. + * + * Based on NEC decoder: + * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> + * + * 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. + */ + +#include <linux/bitrev.h> +#include <linux/module.h> +#include "rc-core-priv.h" + +#define SHARP_NBITS 15 +#define SHARP_UNIT 40000 /* ns */ +#define SHARP_BIT_PULSE (8 * SHARP_UNIT) /* 320us */ +#define SHARP_BIT_0_PERIOD (25 * SHARP_UNIT) /* 1ms (680us space) */ +#define SHARP_BIT_1_PERIOD (50 * SHARP_UNIT) /* 2ms (1680ms space) */ +#define SHARP_ECHO_SPACE (1000 * SHARP_UNIT) /* 40 ms */ +#define SHARP_TRAILER_SPACE (125 * SHARP_UNIT) /* 5 ms (even longer) */ + +enum sharp_state { + STATE_INACTIVE, + STATE_BIT_PULSE, + STATE_BIT_SPACE, + STATE_TRAILER_PULSE, + STATE_ECHO_SPACE, + STATE_TRAILER_SPACE, +}; + +/** + * ir_sharp_decode() - Decode one Sharp pulse or space + * @dev: the struct rc_dev descriptor of the device + * @duration: the struct ir_raw_event descriptor of the pulse/space + * + * This function returns -EINVAL if the pulse violates the state machine + */ +static int ir_sharp_decode(struct rc_dev *dev, struct ir_raw_event ev) +{ + struct sharp_dec *data = &dev->raw->sharp; + u32 msg, echo, address, command, scancode; + + if (!(dev->enabled_protocols & RC_BIT_SHARP)) + return 0; + + if (!is_timing_event(ev)) { + if (ev.reset) + data->state = STATE_INACTIVE; + return 0; + } + + IR_dprintk(2, "Sharp decode started at state %d (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); + + switch (data->state) { + + case STATE_INACTIVE: + if (!ev.pulse) + break; + + if (!eq_margin(ev.duration, SHARP_BIT_PULSE, + SHARP_BIT_PULSE / 2)) + break; + + data->count = 0; + data->pulse_len = ev.duration; + data->state = STATE_BIT_SPACE; + return 0; + + case STATE_BIT_PULSE: + if (!ev.pulse) + break; + + if (!eq_margin(ev.duration, SHARP_BIT_PULSE, + SHARP_BIT_PULSE / 2)) + break; + + data->pulse_len = ev.duration; + data->state = STATE_BIT_SPACE; + return 0; + + case STATE_BIT_SPACE: + if (ev.pulse) + break; + + data->bits <<= 1; + if (eq_margin(data->pulse_len + ev.duration, SHARP_BIT_1_PERIOD, + SHARP_BIT_PULSE * 2)) + data->bits |= 1; + else if (!eq_margin(data->pulse_len + ev.duration, + SHARP_BIT_0_PERIOD, SHARP_BIT_PULSE * 2)) + break; + data->count++; + + if (data->count == SHARP_NBITS || + data->count == SHARP_NBITS * 2) + data->state = STATE_TRAILER_PULSE; + else + data->state = STATE_BIT_PULSE; + + return 0; + + case STATE_TRAILER_PULSE: + if (!ev.pulse) + break; + + if (!eq_margin(ev.duration, SHARP_BIT_PULSE, + SHARP_BIT_PULSE / 2)) + break; + + if (data->count == SHARP_NBITS) { + /* exp,chk bits should be 1,0 */ + if ((data->bits & 0x3) != 0x2) + break; + data->state = STATE_ECHO_SPACE; + } else { + data->state = STATE_TRAILER_SPACE; + } + return 0; + + case STATE_ECHO_SPACE: + if (ev.pulse) + break; + + if (!eq_margin(ev.duration, SHARP_ECHO_SPACE, + SHARP_ECHO_SPACE / 4)) + break; + + data->state = STATE_BIT_PULSE; + + return 0; + + case STATE_TRAILER_SPACE: + if (ev.pulse) + break; + + if (!geq_margin(ev.duration, SHARP_TRAILER_SPACE, + SHARP_BIT_PULSE / 2)) + break; + + /* Validate - command, ext, chk should be inverted in 2nd */ + msg = (data->bits >> 15) & 0x7fff; + echo = data->bits & 0x7fff; + if ((msg ^ echo) != 0x3ff) { + IR_dprintk(1, + "Sharp checksum error: received 0x%04x, 0x%04x\n", + msg, echo); + break; + } + + address = bitrev8((msg >> 7) & 0xf8); + command = bitrev8((msg >> 2) & 0xff); + + scancode = address << 8 | command; + IR_dprintk(1, "Sharp scancode 0x%04x\n", scancode); + + rc_keydown(dev, scancode, 0); + data->state = STATE_INACTIVE; + return 0; + } + + IR_dprintk(1, "Sharp decode failed at count %d state %d (%uus %s)\n", + data->count, data->state, TO_US(ev.duration), + TO_STR(ev.pulse)); + data->state = STATE_INACTIVE; + return -EINVAL; +} + +static struct ir_raw_handler sharp_handler = { + .protocols = RC_BIT_SHARP, + .decode = ir_sharp_decode, +}; + +static int __init ir_sharp_decode_init(void) +{ + ir_raw_handler_register(&sharp_handler); + + pr_info("IR Sharp protocol handler initialized\n"); + return 0; +} + +static void __exit ir_sharp_decode_exit(void) +{ + ir_raw_handler_unregister(&sharp_handler); +} + +module_init(ir_sharp_decode_init); +module_exit(ir_sharp_decode_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("James Hogan <james.hogan@xxxxxxxxxx>"); +MODULE_DESCRIPTION("Sharp IR protocol decoder"); diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index 70a180b..c40d666 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -88,6 +88,12 @@ struct ir_raw_event_ctrl { unsigned count; u64 bits; } sanyo; + struct sharp_dec { + int state; + unsigned count; + u32 bits; + unsigned int pulse_len; + } sharp; struct mce_kbd_dec { struct input_dev *idev; struct timer_list rx_timeout; -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
