diff options
Diffstat (limited to 'drivers/media/IR/ir-sony-decoder.c')
| -rw-r--r-- | drivers/media/IR/ir-sony-decoder.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/drivers/media/IR/ir-sony-decoder.c b/drivers/media/IR/ir-sony-decoder.c deleted file mode 100644 index 2d15730822bc..000000000000 --- a/drivers/media/IR/ir-sony-decoder.c +++ /dev/null @@ -1,182 +0,0 @@ -/* ir-sony-decoder.c - handle Sony IR Pulse/Space protocol - * - * Copyright (C) 2010 by David Härdeman <david@hardeman.nu> - * - * 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 "ir-core-priv.h" - -#define SONY_UNIT 600000 /* ns */ -#define SONY_HEADER_PULSE (4 * SONY_UNIT) -#define SONY_HEADER_SPACE (1 * SONY_UNIT) -#define SONY_BIT_0_PULSE (1 * SONY_UNIT) -#define SONY_BIT_1_PULSE (2 * SONY_UNIT) -#define SONY_BIT_SPACE (1 * SONY_UNIT) -#define SONY_TRAILER_SPACE (10 * SONY_UNIT) /* minimum */ - -enum sony_state { - STATE_INACTIVE, - STATE_HEADER_SPACE, - STATE_BIT_PULSE, - STATE_BIT_SPACE, - STATE_FINISHED, -}; - -/** - * ir_sony_decode() - Decode one Sony pulse or space - * @input_dev: the struct input_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_sony_decode(struct input_dev *input_dev, struct ir_raw_event ev) -{ - struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); - struct sony_dec *data = &ir_dev->raw->sony; - u32 scancode; - u8 device, subdevice, function; - - if (!(ir_dev->raw->enabled_protocols & IR_TYPE_SONY)) - return 0; - - if (!is_timing_event(ev)) { - if (ev.reset) - data->state = STATE_INACTIVE; - return 0; - } - - if (!geq_margin(ev.duration, SONY_UNIT, SONY_UNIT / 2)) - goto out; - - IR_dprintk(2, "Sony 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, SONY_HEADER_PULSE, SONY_UNIT / 2)) - break; - - data->count = 0; - data->state = STATE_HEADER_SPACE; - return 0; - - case STATE_HEADER_SPACE: - if (ev.pulse) - break; - - if (!eq_margin(ev.duration, SONY_HEADER_SPACE, SONY_UNIT / 2)) - break; - - data->state = STATE_BIT_PULSE; - return 0; - - case STATE_BIT_PULSE: - if (!ev.pulse) - break; - - data->bits <<= 1; - if (eq_margin(ev.duration, SONY_BIT_1_PULSE, SONY_UNIT / 2)) - data->bits |= 1; - else if (!eq_margin(ev.duration, SONY_BIT_0_PULSE, SONY_UNIT / 2)) - break; - - data->count++; - data->state = STATE_BIT_SPACE; - return 0; - - case STATE_BIT_SPACE: - if (ev.pulse) - break; - - if (!geq_margin(ev.duration, SONY_BIT_SPACE, SONY_UNIT / 2)) - break; - - decrease_duration(&ev, SONY_BIT_SPACE); - - if (!geq_margin(ev.duration, SONY_UNIT, SONY_UNIT / 2)) { - data->state = STATE_BIT_PULSE; - return 0; - } - - data->state = STATE_FINISHED; - /* Fall through */ - - case STATE_FINISHED: - if (ev.pulse) - break; - - if (!geq_margin(ev.duration, SONY_TRAILER_SPACE, SONY_UNIT / 2)) - break; - - switch (data->count) { - case 12: - device = bitrev8((data->bits << 3) & 0xF8); - subdevice = 0; - function = bitrev8((data->bits >> 4) & 0xFE); - break; - case 15: - device = bitrev8((data->bits >> 0) & 0xFF); - subdevice = 0; - function = bitrev8((data->bits >> 7) & 0xFD); - break; - case 20: - device = bitrev8((data->bits >> 5) & 0xF8); - subdevice = bitrev8((data->bits >> 0) & 0xFF); - function = bitrev8((data->bits >> 12) & 0xFE); - break; - default: - IR_dprintk(1, "Sony invalid bitcount %u\n", data->count); - goto out; - } - - scancode = device << 16 | subdevice << 8 | function; - IR_dprintk(1, "Sony(%u) scancode 0x%05x\n", data->count, scancode); - ir_keydown(input_dev, scancode, 0); - data->state = STATE_INACTIVE; - return 0; - } - -out: - IR_dprintk(1, "Sony decode failed at state %d (%uus %s)\n", - data->state, TO_US(ev.duration), TO_STR(ev.pulse)); - data->state = STATE_INACTIVE; - return -EINVAL; -} - -static struct ir_raw_handler sony_handler = { - .protocols = IR_TYPE_SONY, - .decode = ir_sony_decode, -}; - -static int __init ir_sony_decode_init(void) -{ - ir_raw_handler_register(&sony_handler); - - printk(KERN_INFO "IR Sony protocol handler initialized\n"); - return 0; -} - -static void __exit ir_sony_decode_exit(void) -{ - ir_raw_handler_unregister(&sony_handler); -} - -module_init(ir_sony_decode_init); -module_exit(ir_sony_decode_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("David Härdeman <david@hardeman.nu>"); -MODULE_DESCRIPTION("Sony IR protocol decoder"); |