1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | bt866 - BT866 Digital Video Encoder (Rockwell Part) |
4 | |
5 | Copyright (C) 1999 Mike Bernson <mike@mlb.org> |
6 | Copyright (C) 1998 Dave Perks <dperks@ibm.net> |
7 | |
8 | Modifications for LML33/DC10plus unified driver |
9 | Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> |
10 | |
11 | This code was modify/ported from the saa7111 driver written |
12 | by Dave Perks. |
13 | |
14 | This code was adapted for the bt866 by Christer Weinigel and ported |
15 | to 2.6 by Martin Samuelsson. |
16 | |
17 | */ |
18 | |
19 | #include <linux/module.h> |
20 | #include <linux/types.h> |
21 | #include <linux/slab.h> |
22 | #include <linux/ioctl.h> |
23 | #include <linux/uaccess.h> |
24 | #include <linux/i2c.h> |
25 | #include <linux/videodev2.h> |
26 | #include <media/v4l2-device.h> |
27 | |
28 | MODULE_DESCRIPTION("Brooktree-866 video encoder driver" ); |
29 | MODULE_AUTHOR("Mike Bernson & Dave Perks" ); |
30 | MODULE_LICENSE("GPL" ); |
31 | |
32 | static int debug; |
33 | module_param(debug, int, 0); |
34 | MODULE_PARM_DESC(debug, "Debug level (0-1)" ); |
35 | |
36 | |
37 | /* ----------------------------------------------------------------------- */ |
38 | |
39 | struct bt866 { |
40 | struct v4l2_subdev sd; |
41 | u8 reg[256]; |
42 | }; |
43 | |
44 | static inline struct bt866 *to_bt866(struct v4l2_subdev *sd) |
45 | { |
46 | return container_of(sd, struct bt866, sd); |
47 | } |
48 | |
49 | static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data) |
50 | { |
51 | struct i2c_client *client = v4l2_get_subdevdata(sd: &encoder->sd); |
52 | u8 buffer[2]; |
53 | int err; |
54 | |
55 | buffer[0] = subaddr; |
56 | buffer[1] = data; |
57 | |
58 | encoder->reg[subaddr] = data; |
59 | |
60 | v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n" , subaddr, data); |
61 | |
62 | for (err = 0; err < 3;) { |
63 | if (i2c_master_send(client, buf: buffer, count: 2) == 2) |
64 | break; |
65 | err++; |
66 | v4l_warn(client, "error #%d writing to 0x%02x\n" , |
67 | err, subaddr); |
68 | schedule_timeout_interruptible(timeout: msecs_to_jiffies(m: 100)); |
69 | } |
70 | if (err == 3) { |
71 | v4l_warn(client, "giving up\n" ); |
72 | return -1; |
73 | } |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) |
79 | { |
80 | v4l2_dbg(1, debug, sd, "set norm %llx\n" , (unsigned long long)std); |
81 | |
82 | /* Only PAL supported by this driver at the moment! */ |
83 | if (!(std & V4L2_STD_NTSC)) |
84 | return -EINVAL; |
85 | return 0; |
86 | } |
87 | |
88 | static int bt866_s_routing(struct v4l2_subdev *sd, |
89 | u32 input, u32 output, u32 config) |
90 | { |
91 | static const __u8 init[] = { |
92 | 0xc8, 0xcc, /* CRSCALE */ |
93 | 0xca, 0x91, /* CBSCALE */ |
94 | 0xcc, 0x24, /* YC16 | OSDNUM */ |
95 | 0xda, 0x00, /* */ |
96 | 0xdc, 0x24, /* SETMODE | PAL */ |
97 | 0xde, 0x02, /* EACTIVE */ |
98 | |
99 | /* overlay colors */ |
100 | 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */ |
101 | 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */ |
102 | 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */ |
103 | 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */ |
104 | 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */ |
105 | 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */ |
106 | 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */ |
107 | 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */ |
108 | |
109 | 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */ |
110 | 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */ |
111 | 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */ |
112 | 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */ |
113 | 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */ |
114 | 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */ |
115 | 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */ |
116 | 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */ |
117 | }; |
118 | struct bt866 *encoder = to_bt866(sd); |
119 | u8 val; |
120 | int i; |
121 | |
122 | for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2) |
123 | bt866_write(encoder, subaddr: init[i], data: init[i+1]); |
124 | |
125 | val = encoder->reg[0xdc]; |
126 | |
127 | if (input == 0) |
128 | val |= 0x40; /* CBSWAP */ |
129 | else |
130 | val &= ~0x40; /* !CBSWAP */ |
131 | |
132 | bt866_write(encoder, subaddr: 0xdc, data: val); |
133 | |
134 | val = encoder->reg[0xcc]; |
135 | if (input == 2) |
136 | val |= 0x01; /* OSDBAR */ |
137 | else |
138 | val &= ~0x01; /* !OSDBAR */ |
139 | bt866_write(encoder, subaddr: 0xcc, data: val); |
140 | |
141 | v4l2_dbg(1, debug, sd, "set input %d\n" , input); |
142 | |
143 | switch (input) { |
144 | case 0: |
145 | case 1: |
146 | case 2: |
147 | break; |
148 | default: |
149 | return -EINVAL; |
150 | } |
151 | return 0; |
152 | } |
153 | |
154 | #if 0 |
155 | /* Code to setup square pixels, might be of some use in the future, |
156 | but is currently unused. */ |
157 | val = encoder->reg[0xdc]; |
158 | if (*iarg) |
159 | val |= 1; /* SQUARE */ |
160 | else |
161 | val &= ~1; /* !SQUARE */ |
162 | bt866_write(client, 0xdc, val); |
163 | #endif |
164 | |
165 | /* ----------------------------------------------------------------------- */ |
166 | |
167 | static const struct v4l2_subdev_video_ops bt866_video_ops = { |
168 | .s_std_output = bt866_s_std_output, |
169 | .s_routing = bt866_s_routing, |
170 | }; |
171 | |
172 | static const struct v4l2_subdev_ops bt866_ops = { |
173 | .video = &bt866_video_ops, |
174 | }; |
175 | |
176 | static int bt866_probe(struct i2c_client *client) |
177 | { |
178 | struct bt866 *encoder; |
179 | struct v4l2_subdev *sd; |
180 | |
181 | v4l_info(client, "chip found @ 0x%x (%s)\n" , |
182 | client->addr << 1, client->adapter->name); |
183 | |
184 | encoder = devm_kzalloc(dev: &client->dev, size: sizeof(*encoder), GFP_KERNEL); |
185 | if (encoder == NULL) |
186 | return -ENOMEM; |
187 | sd = &encoder->sd; |
188 | v4l2_i2c_subdev_init(sd, client, ops: &bt866_ops); |
189 | return 0; |
190 | } |
191 | |
192 | static void bt866_remove(struct i2c_client *client) |
193 | { |
194 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
195 | |
196 | v4l2_device_unregister_subdev(sd); |
197 | } |
198 | |
199 | static const struct i2c_device_id bt866_id[] = { |
200 | { "bt866" , 0 }, |
201 | { } |
202 | }; |
203 | MODULE_DEVICE_TABLE(i2c, bt866_id); |
204 | |
205 | static struct i2c_driver bt866_driver = { |
206 | .driver = { |
207 | .name = "bt866" , |
208 | }, |
209 | .probe = bt866_probe, |
210 | .remove = bt866_remove, |
211 | .id_table = bt866_id, |
212 | }; |
213 | |
214 | module_i2c_driver(bt866_driver); |
215 | |