hid-picolcd_cir.c revision c5540fbb9de39ceec108a889133664a887c2f55a 
1/***************************************************************************
2 *   Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org>  *
3 *                                                                         *
4 *   Based on Logitech G13 driver (v0.4)                                   *
5 *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
6 *                                                                         *
7 *   This program is free software: you can redistribute it and/or modify  *
8 *   it under the terms of the GNU General Public License as published by  *
9 *   the Free Software Foundation, version 2 of the License.               *
10 *                                                                         *
11 *   This driver is distributed in the hope that it will be useful, but    *
12 *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
14 *   General Public License for more details.                              *
15 *                                                                         *
16 *   You should have received a copy of the GNU General Public License     *
17 *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
18 ***************************************************************************/
19
20#include <linux/hid.h>
21#include <linux/hid-debug.h>
22#include <linux/input.h>
23#include "hid-ids.h"
24
25#include <linux/fb.h>
26#include <linux/vmalloc.h>
27#include <linux/backlight.h>
28#include <linux/lcd.h>
29
30#include <linux/leds.h>
31
32#include <linux/seq_file.h>
33#include <linux/debugfs.h>
34
35#include <linux/completion.h>
36#include <linux/uaccess.h>
37#include <linux/module.h>
38#include <media/rc-core.h>
39
40#include "hid-picolcd.h"
41
42
43int picolcd_raw_cir(struct picolcd_data *data,
44		struct hid_report *report, u8 *raw_data, int size)
45{
46	unsigned long flags;
47	int i, w, sz;
48	DEFINE_IR_RAW_EVENT(rawir);
49
50	/* ignore if rc_dev is NULL or status is shunned */
51	spin_lock_irqsave(&data->lock, flags);
52	if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) {
53		spin_unlock_irqrestore(&data->lock, flags);
54		return 1;
55	}
56	spin_unlock_irqrestore(&data->lock, flags);
57
58	/* PicoLCD USB packets contain 16-bit intervals in network order,
59	 * with value negated for pulse. Intervals are in microseconds.
60	 *
61	 * Note: some userspace LIRC code for PicoLCD says negated values
62	 * for space - is it a matter of IR chip? (pulse for my TSOP2236)
63	 *
64	 * In addition, the first interval seems to be around 15000 + base
65	 * interval for non-first report of IR data - thus the quirk below
66	 * to get RC_CODE to understand Sony and JVC remotes I have at hand
67	 */
68	sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
69	for (i = 0; i+1 < sz; i += 2) {
70		init_ir_raw_event(&rawir);
71		w = (raw_data[i] << 8) | (raw_data[i+1]);
72		rawir.pulse = !!(w & 0x8000);
73		rawir.duration = US_TO_NS(rawir.pulse ? (65536 - w) : w);
74		/* Quirk!! - see above */
75		if (i == 0 && rawir.duration > 15000000)
76			rawir.duration -= 15000000;
77		ir_raw_event_store(data->rc_dev, &rawir);
78	}
79	ir_raw_event_handle(data->rc_dev);
80
81	return 1;
82}
83
84static int picolcd_cir_open(struct rc_dev *dev)
85{
86	struct picolcd_data *data = dev->priv;
87	unsigned long flags;
88
89	spin_lock_irqsave(&data->lock, flags);
90	data->status &= ~PICOLCD_CIR_SHUN;
91	spin_unlock_irqrestore(&data->lock, flags);
92	return 0;
93}
94
95static void picolcd_cir_close(struct rc_dev *dev)
96{
97	struct picolcd_data *data = dev->priv;
98	unsigned long flags;
99
100	spin_lock_irqsave(&data->lock, flags);
101	data->status |= PICOLCD_CIR_SHUN;
102	spin_unlock_irqrestore(&data->lock, flags);
103}
104
105/* initialize CIR input device */
106int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
107{
108	struct rc_dev *rdev;
109	int ret = 0;
110
111	rdev = rc_allocate_device();
112	if (!rdev)
113		return -ENOMEM;
114
115	rdev->priv             = data;
116	rdev->driver_type      = RC_DRIVER_IR_RAW;
117	rdev->allowed_protocols = RC_BIT_ALL;
118	rdev->open             = picolcd_cir_open;
119	rdev->close            = picolcd_cir_close;
120	rdev->input_name       = data->hdev->name;
121	rdev->input_phys       = data->hdev->phys;
122	rdev->input_id.bustype = data->hdev->bus;
123	rdev->input_id.vendor  = data->hdev->vendor;
124	rdev->input_id.product = data->hdev->product;
125	rdev->input_id.version = data->hdev->version;
126	rdev->dev.parent       = &data->hdev->dev;
127	rdev->driver_name      = PICOLCD_NAME;
128	rdev->map_name         = RC_MAP_RC6_MCE;
129	rdev->timeout          = MS_TO_NS(100);
130	rdev->rx_resolution    = US_TO_NS(1);
131
132	ret = rc_register_device(rdev);
133	if (ret)
134		goto err;
135	data->rc_dev = rdev;
136	return 0;
137
138err:
139	rc_free_device(rdev);
140	return ret;
141}
142
143void picolcd_exit_cir(struct picolcd_data *data)
144{
145	struct rc_dev *rdev = data->rc_dev;
146
147	data->rc_dev = NULL;
148	if (rdev)
149		rc_unregister_device(rdev);
150}
151
152