1// SPDX-License-Identifier: GPL-2.0-only
2/***************************************************************************
3 *   Copyright (C) 2010-2012 by Bruno Pr��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
33int 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
73static 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
84static 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 */
95int 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
126err:
127	rc_free_device(rdev);
128	return ret;
129}
130
131void 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