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 struct 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 w = (raw_data[i] << 8) | (raw_data[i+1]);
71 rawir.pulse = !!(w & 0x8000);
72 rawir.duration = US_TO_NS(rawir.pulse ? (65536 - w) : w);
73 /* Quirk!! - see above */
74 if (i == 0 && rawir.duration > 15000000)
75 rawir.duration -= 15000000;
76 ir_raw_event_store(data->rc_dev, &rawir);
77 }
78 ir_raw_event_handle(data->rc_dev);
79
80 return 1;
81}
82
83static int picolcd_cir_open(struct rc_dev *dev)
84{
85 struct picolcd_data *data = dev->priv;
86 unsigned long flags;
87
88 spin_lock_irqsave(&data->lock, flags);
89 data->status &= ~PICOLCD_CIR_SHUN;
90 spin_unlock_irqrestore(&data->lock, flags);
91 return 0;
92}
93
94static void picolcd_cir_close(struct rc_dev *dev)
95{
96 struct picolcd_data *data = dev->priv;
97 unsigned long flags;
98
99 spin_lock_irqsave(&data->lock, flags);
100 data->status |= PICOLCD_CIR_SHUN;
101 spin_unlock_irqrestore(&data->lock, flags);
102}
103
104/* initialize CIR input device */
105int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
106{
107 struct rc_dev *rdev;
108 int ret = 0;
109
110 rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
111 if (!rdev)
112 return -ENOMEM;
113
114 rdev->priv = data;
115 rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
116 rdev->open = picolcd_cir_open;
117 rdev->close = picolcd_cir_close;
118 rdev->device_name = data->hdev->name;
119 rdev->input_phys = data->hdev->phys;
120 rdev->input_id.bustype = data->hdev->bus;
121 rdev->input_id.vendor = data->hdev->vendor;
122 rdev->input_id.product = data->hdev->product;
123 rdev->input_id.version = data->hdev->version;
124 rdev->dev.parent = &data->hdev->dev;
125 rdev->driver_name = PICOLCD_NAME;
126 rdev->map_name = RC_MAP_RC6_MCE;
127 rdev->timeout = MS_TO_NS(100);
128 rdev->rx_resolution = US_TO_NS(1);
129
130 ret = rc_register_device(rdev);
131 if (ret)
132 goto err;
133 data->rc_dev = rdev;
134 return 0;
135
136err:
137 rc_free_device(rdev);
138 return ret;
139}
140
141void picolcd_exit_cir(struct picolcd_data *data)
142{
143 struct rc_dev *rdev = data->rc_dev;
144
145 data->rc_dev = NULL;
146 rc_unregister_device(rdev);
147}
148
149