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[linux-3.10.git] / drivers / hid / hid-picolcd_cir.c
1 /***************************************************************************
2  *   Copyright (C) 2010-2012 by Bruno PrĂ©mont <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
43 int 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
84 static 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
95 static 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 */
106 int 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_protos   = 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
138 err:
139         rc_free_device(rdev);
140         return ret;
141 }
142
143 void 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