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 | |
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(lock: &data->lock, flags); |
44 | return 1; |
45 | } |
46 | spin_unlock_irqrestore(lock: &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(dev: data->rc_dev, ev: &rawir); |
67 | } |
68 | ir_raw_event_handle(dev: 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(lock: &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(lock: &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(dev: rdev); |
121 | if (ret) |
122 | goto err; |
123 | data->rc_dev = rdev; |
124 | return 0; |
125 | |
126 | err: |
127 | rc_free_device(dev: 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(dev: rdev); |
137 | } |
138 | |
139 | |