1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * FireDTV driver (formerly known as FireSAT)
4  *
5  * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
6  */
7 
8 #include <linux/bitops.h>
9 #include <linux/input.h>
10 #include <linux/kernel.h>
11 #include <linux/slab.h>
12 #include <linux/string.h>
13 #include <linux/types.h>
14 #include <linux/workqueue.h>
15 
16 #include "firedtv.h"
17 
18 /* fixed table with older keycodes, geared towards MythTV */
19 static const u16 oldtable[] = {
20 
21 	/* code from device: 0x4501...0x451f */
22 
23 	KEY_ESC,
24 	KEY_F9,
25 	KEY_1,
26 	KEY_2,
27 	KEY_3,
28 	KEY_4,
29 	KEY_5,
30 	KEY_6,
31 	KEY_7,
32 	KEY_8,
33 	KEY_9,
34 	KEY_I,
35 	KEY_0,
36 	KEY_ENTER,
37 	KEY_RED,
38 	KEY_UP,
39 	KEY_GREEN,
40 	KEY_F10,
41 	KEY_SPACE,
42 	KEY_F11,
43 	KEY_YELLOW,
44 	KEY_DOWN,
45 	KEY_BLUE,
46 	KEY_Z,
47 	KEY_P,
48 	KEY_PAGEDOWN,
49 	KEY_LEFT,
50 	KEY_W,
51 	KEY_RIGHT,
52 	KEY_P,
53 	KEY_M,
54 
55 	/* code from device: 0x4540...0x4542 */
56 
57 	KEY_R,
58 	KEY_V,
59 	KEY_C,
60 };
61 
62 /* user-modifiable table for a remote as sold in 2008 */
63 static const u16 keytable[] = {
64 
65 	/* code from device: 0x0300...0x031f */
66 
67 	[0x00] = KEY_POWER,
68 	[0x01] = KEY_SLEEP,
69 	[0x02] = KEY_STOP,
70 	[0x03] = KEY_OK,
71 	[0x04] = KEY_RIGHT,
72 	[0x05] = KEY_1,
73 	[0x06] = KEY_2,
74 	[0x07] = KEY_3,
75 	[0x08] = KEY_LEFT,
76 	[0x09] = KEY_4,
77 	[0x0a] = KEY_5,
78 	[0x0b] = KEY_6,
79 	[0x0c] = KEY_UP,
80 	[0x0d] = KEY_7,
81 	[0x0e] = KEY_8,
82 	[0x0f] = KEY_9,
83 	[0x10] = KEY_DOWN,
84 	[0x11] = KEY_TITLE,	/* "OSD" - fixme */
85 	[0x12] = KEY_0,
86 	[0x13] = KEY_F20,	/* "16:9" - fixme */
87 	[0x14] = KEY_SCREEN,	/* "FULL" - fixme */
88 	[0x15] = KEY_MUTE,
89 	[0x16] = KEY_SUBTITLE,
90 	[0x17] = KEY_RECORD,
91 	[0x18] = KEY_TEXT,
92 	[0x19] = KEY_AUDIO,
93 	[0x1a] = KEY_RED,
94 	[0x1b] = KEY_PREVIOUS,
95 	[0x1c] = KEY_REWIND,
96 	[0x1d] = KEY_PLAYPAUSE,
97 	[0x1e] = KEY_NEXT,
98 	[0x1f] = KEY_VOLUMEUP,
99 
100 	/* code from device: 0x0340...0x0354 */
101 
102 	[0x20] = KEY_CHANNELUP,
103 	[0x21] = KEY_F21,	/* "4:3" - fixme */
104 	[0x22] = KEY_TV,
105 	[0x23] = KEY_DVD,
106 	[0x24] = KEY_VCR,
107 	[0x25] = KEY_AUX,
108 	[0x26] = KEY_GREEN,
109 	[0x27] = KEY_YELLOW,
110 	[0x28] = KEY_BLUE,
111 	[0x29] = KEY_CHANNEL,	/* "CH.LIST" */
112 	[0x2a] = KEY_VENDOR,	/* "CI" - fixme */
113 	[0x2b] = KEY_VOLUMEDOWN,
114 	[0x2c] = KEY_CHANNELDOWN,
115 	[0x2d] = KEY_LAST,
116 	[0x2e] = KEY_INFO,
117 	[0x2f] = KEY_FORWARD,
118 	[0x30] = KEY_LIST,
119 	[0x31] = KEY_FAVORITES,
120 	[0x32] = KEY_MENU,
121 	[0x33] = KEY_EPG,
122 	[0x34] = KEY_EXIT,
123 };
124 
125 int fdtv_register_rc(struct firedtv *fdtv, struct device *dev)
126 {
127 	struct input_dev *idev;
128 	int i, err;
129 
130 	idev = input_allocate_device();
131 	if (!idev)
132 		return -ENOMEM;
133 
134 	fdtv->remote_ctrl_dev = idev;
135 	idev->name = "FireDTV remote control";
136 	idev->dev.parent = dev;
137 	idev->evbit[0] = BIT_MASK(EV_KEY);
138 	idev->keycode = kmemdup(keytable, sizeof(keytable), GFP_KERNEL);
139 	if (!idev->keycode) {
140 		err = -ENOMEM;
141 		goto fail;
142 	}
143 	idev->keycodesize = sizeof(keytable[0]);
144 	idev->keycodemax = ARRAY_SIZE(keytable);
145 
146 	for (i = 0; i < ARRAY_SIZE(keytable); i++)
147 		set_bit(keytable[i], idev->keybit);
148 
149 	err = input_register_device(idev);
150 	if (err)
151 		goto fail_free_keymap;
152 
153 	return 0;
154 
155 fail_free_keymap:
156 	kfree(idev->keycode);
157 fail:
158 	input_free_device(idev);
159 	return err;
160 }
161 
162 void fdtv_unregister_rc(struct firedtv *fdtv)
163 {
164 	cancel_work_sync(&fdtv->remote_ctrl_work);
165 	kfree(fdtv->remote_ctrl_dev->keycode);
166 	input_unregister_device(fdtv->remote_ctrl_dev);
167 }
168 
169 void fdtv_handle_rc(struct firedtv *fdtv, unsigned int code)
170 {
171 	struct input_dev *idev = fdtv->remote_ctrl_dev;
172 	u16 *keycode = idev->keycode;
173 
174 	if (code >= 0x0300 && code <= 0x031f)
175 		code = keycode[code - 0x0300];
176 	else if (code >= 0x0340 && code <= 0x0354)
177 		code = keycode[code - 0x0320];
178 	else if (code >= 0x4501 && code <= 0x451f)
179 		code = oldtable[code - 0x4501];
180 	else if (code >= 0x4540 && code <= 0x4542)
181 		code = oldtable[code - 0x4521];
182 	else {
183 		dev_dbg(fdtv->device,
184 			"invalid key code 0x%04x from remote control\n",
185 			code);
186 		return;
187 	}
188 
189 	input_report_key(idev, code, 1);
190 	input_sync(idev);
191 	input_report_key(idev, code, 0);
192 	input_sync(idev);
193 }
194