1 // SPDX-License-Identifier: GPL-2.0-only
2 /***************************************************************************
3 * Copyright (C) 2010-2012 by Bruno Prémont <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
picolcd_raw_cir(struct picolcd_data * data,struct hid_report * report,u8 * raw_data,int size)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
picolcd_cir_open(struct rc_dev * dev)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
picolcd_cir_close(struct rc_dev * dev)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 */
picolcd_init_cir(struct picolcd_data * data,struct hid_report * report)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
picolcd_exit_cir(struct picolcd_data * data)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
139