Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[platform/kernel/linux-rpi.git] / drivers / hid / hid-picolcd_cir.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /***************************************************************************
3  *   Copyright (C) 2010-2012 by Bruno PrĂ©mont <bonbons@linux-vserver.org>  *
4  *                                                                         *
5  *   Based on Logitech G13 driver (v0.4)                                   *
6  *     Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu>   *
7  *                                                                         *
8  ***************************************************************************/
9
10 #include <linux/hid.h>
11 #include <linux/hid-debug.h>
12 #include <linux/input.h>
13 #include "hid-ids.h"
14
15 #include <linux/fb.h>
16 #include <linux/vmalloc.h>
17 #include <linux/backlight.h>
18 #include <linux/lcd.h>
19
20 #include <linux/leds.h>
21
22 #include <linux/seq_file.h>
23 #include <linux/debugfs.h>
24
25 #include <linux/completion.h>
26 #include <linux/uaccess.h>
27 #include <linux/module.h>
28 #include <media/rc-core.h>
29
30 #include "hid-picolcd.h"
31
32
33 int picolcd_raw_cir(struct picolcd_data *data,
34                 struct hid_report *report, u8 *raw_data, int size)
35 {
36         unsigned long flags;
37         int i, w, sz;
38         struct ir_raw_event rawir = {};
39
40         /* ignore if rc_dev is NULL or status is shunned */
41         spin_lock_irqsave(&data->lock, flags);
42         if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) {
43                 spin_unlock_irqrestore(&data->lock, flags);
44                 return 1;
45         }
46         spin_unlock_irqrestore(&data->lock, flags);
47
48         /* PicoLCD USB packets contain 16-bit intervals in network order,
49          * with value negated for pulse. Intervals are in microseconds.
50          *
51          * Note: some userspace LIRC code for PicoLCD says negated values
52          * for space - is it a matter of IR chip? (pulse for my TSOP2236)
53          *
54          * In addition, the first interval seems to be around 15000 + base
55          * interval for non-first report of IR data - thus the quirk below
56          * to get RC_CODE to understand Sony and JVC remotes I have at hand
57          */
58         sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
59         for (i = 0; i+1 < sz; i += 2) {
60                 w = (raw_data[i] << 8) | (raw_data[i+1]);
61                 rawir.pulse = !!(w & 0x8000);
62                 rawir.duration = rawir.pulse ? (65536 - w) : w;
63                 /* Quirk!! - see above */
64                 if (i == 0 && rawir.duration > 15000)
65                         rawir.duration -= 15000;
66                 ir_raw_event_store(data->rc_dev, &rawir);
67         }
68         ir_raw_event_handle(data->rc_dev);
69
70         return 1;
71 }
72
73 static int picolcd_cir_open(struct rc_dev *dev)
74 {
75         struct picolcd_data *data = dev->priv;
76         unsigned long flags;
77
78         spin_lock_irqsave(&data->lock, flags);
79         data->status &= ~PICOLCD_CIR_SHUN;
80         spin_unlock_irqrestore(&data->lock, flags);
81         return 0;
82 }
83
84 static void picolcd_cir_close(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 }
93
94 /* initialize CIR input device */
95 int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
96 {
97         struct rc_dev *rdev;
98         int ret = 0;
99
100         rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
101         if (!rdev)
102                 return -ENOMEM;
103
104         rdev->priv             = data;
105         rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
106         rdev->open             = picolcd_cir_open;
107         rdev->close            = picolcd_cir_close;
108         rdev->device_name      = data->hdev->name;
109         rdev->input_phys       = data->hdev->phys;
110         rdev->input_id.bustype = data->hdev->bus;
111         rdev->input_id.vendor  = data->hdev->vendor;
112         rdev->input_id.product = data->hdev->product;
113         rdev->input_id.version = data->hdev->version;
114         rdev->dev.parent       = &data->hdev->dev;
115         rdev->driver_name      = PICOLCD_NAME;
116         rdev->map_name         = RC_MAP_RC6_MCE;
117         rdev->timeout          = MS_TO_US(100);
118         rdev->rx_resolution    = 1;
119
120         ret = rc_register_device(rdev);
121         if (ret)
122                 goto err;
123         data->rc_dev = rdev;
124         return 0;
125
126 err:
127         rc_free_device(rdev);
128         return ret;
129 }
130
131 void picolcd_exit_cir(struct picolcd_data *data)
132 {
133         struct rc_dev *rdev = data->rc_dev;
134
135         data->rc_dev = NULL;
136         rc_unregister_device(rdev);
137 }
138