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1 | /* | |
2 | * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver | |
3 | * | |
4 | * 2003 by T.Adachi (tadachi@tadachi-net.com) | |
5 | * 2003 by Takeru KOMORIYA <komoriya@paken.org> | |
6 | * 2006 by Hans Verkuil <hverkuil@xs4all.nl> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version 2 | |
11 | * of the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/videodev2.h> | |
23 | #include <linux/slab.h> | |
24 | #include <media/v4l2-device.h> | |
25 | #include <media/i2c/upd64083.h> | |
26 | ||
27 | MODULE_DESCRIPTION("uPD64083 driver"); | |
28 | MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); | |
29 | MODULE_LICENSE("GPL"); | |
30 | ||
31 | static bool debug; | |
32 | module_param(debug, bool, 0644); | |
33 | ||
34 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
35 | ||
36 | ||
37 | enum { | |
38 | R00 = 0, R01, R02, R03, R04, | |
39 | R05, R06, R07, R08, R09, | |
40 | R0A, R0B, R0C, R0D, R0E, R0F, | |
41 | R10, R11, R12, R13, R14, | |
42 | R15, R16, | |
43 | TOT_REGS | |
44 | }; | |
45 | ||
46 | struct upd64083_state { | |
47 | struct v4l2_subdev sd; | |
48 | u8 mode; | |
49 | u8 ext_y_adc; | |
50 | u8 regs[TOT_REGS]; | |
51 | }; | |
52 | ||
53 | static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) | |
54 | { | |
55 | return container_of(sd, struct upd64083_state, sd); | |
56 | } | |
57 | ||
58 | /* Initial values when used in combination with the | |
59 | NEC upd64031a ghost reduction chip. */ | |
60 | static u8 upd64083_init[] = { | |
61 | 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ | |
62 | 0x36, 0xdd, 0x05, 0x56, 0x48, | |
63 | 0x00, 0x3a, 0xa0, 0x05, 0x08, | |
64 | 0x44, 0x60, 0x08, 0x52, 0xf8, | |
65 | 0x53, 0x60, 0x10 | |
66 | }; | |
67 | ||
68 | /* ------------------------------------------------------------------------ */ | |
69 | ||
70 | static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val) | |
71 | { | |
72 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
73 | u8 buf[2]; | |
74 | ||
75 | buf[0] = reg; | |
76 | buf[1] = val; | |
77 | v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val); | |
78 | if (i2c_master_send(client, buf, 2) != 2) | |
79 | v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); | |
80 | } | |
81 | ||
82 | /* ------------------------------------------------------------------------ */ | |
83 | ||
84 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
85 | static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) | |
86 | { | |
87 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
88 | u8 buf[7]; | |
89 | ||
90 | if (reg >= sizeof(buf)) | |
91 | return 0xff; | |
92 | i2c_master_recv(client, buf, sizeof(buf)); | |
93 | return buf[reg]; | |
94 | } | |
95 | #endif | |
96 | ||
97 | /* ------------------------------------------------------------------------ */ | |
98 | ||
99 | static int upd64083_s_routing(struct v4l2_subdev *sd, | |
100 | u32 input, u32 output, u32 config) | |
101 | { | |
102 | struct upd64083_state *state = to_state(sd); | |
103 | u8 r00, r02; | |
104 | ||
105 | if (input > 7 || (input & 6) == 6) | |
106 | return -EINVAL; | |
107 | state->mode = (input & 3) << 6; | |
108 | state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3; | |
109 | r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; | |
110 | r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; | |
111 | upd64083_write(sd, R00, r00); | |
112 | upd64083_write(sd, R02, r02); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
117 | static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) | |
118 | { | |
119 | reg->val = upd64083_read(sd, reg->reg & 0xff); | |
120 | reg->size = 1; | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) | |
125 | { | |
126 | upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff); | |
127 | return 0; | |
128 | } | |
129 | #endif | |
130 | ||
131 | static int upd64083_log_status(struct v4l2_subdev *sd) | |
132 | { | |
133 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
134 | u8 buf[7]; | |
135 | ||
136 | i2c_master_recv(client, buf, 7); | |
137 | v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " | |
138 | "SA04=%02x SA05=%02x SA06=%02x\n", | |
139 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); | |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* ----------------------------------------------------------------------- */ | |
144 | ||
145 | static const struct v4l2_subdev_core_ops upd64083_core_ops = { | |
146 | .log_status = upd64083_log_status, | |
147 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
148 | .g_register = upd64083_g_register, | |
149 | .s_register = upd64083_s_register, | |
150 | #endif | |
151 | }; | |
152 | ||
153 | static const struct v4l2_subdev_video_ops upd64083_video_ops = { | |
154 | .s_routing = upd64083_s_routing, | |
155 | }; | |
156 | ||
157 | static const struct v4l2_subdev_ops upd64083_ops = { | |
158 | .core = &upd64083_core_ops, | |
159 | .video = &upd64083_video_ops, | |
160 | }; | |
161 | ||
162 | /* ------------------------------------------------------------------------ */ | |
163 | ||
164 | /* i2c implementation */ | |
165 | ||
166 | static int upd64083_probe(struct i2c_client *client, | |
167 | const struct i2c_device_id *id) | |
168 | { | |
169 | struct upd64083_state *state; | |
170 | struct v4l2_subdev *sd; | |
171 | int i; | |
172 | ||
173 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
174 | return -EIO; | |
175 | ||
176 | v4l_info(client, "chip found @ 0x%x (%s)\n", | |
177 | client->addr << 1, client->adapter->name); | |
178 | ||
179 | state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); | |
180 | if (state == NULL) | |
181 | return -ENOMEM; | |
182 | sd = &state->sd; | |
183 | v4l2_i2c_subdev_init(sd, client, &upd64083_ops); | |
184 | /* Initially assume that a ghost reduction chip is present */ | |
185 | state->mode = 0; /* YCS mode */ | |
186 | state->ext_y_adc = (1 << 5); | |
187 | memcpy(state->regs, upd64083_init, TOT_REGS); | |
188 | for (i = 0; i < TOT_REGS; i++) | |
189 | upd64083_write(sd, i, state->regs[i]); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static int upd64083_remove(struct i2c_client *client) | |
194 | { | |
195 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
196 | ||
197 | v4l2_device_unregister_subdev(sd); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | /* ----------------------------------------------------------------------- */ | |
202 | ||
203 | static const struct i2c_device_id upd64083_id[] = { | |
204 | { "upd64083", 0 }, | |
205 | { } | |
206 | }; | |
207 | MODULE_DEVICE_TABLE(i2c, upd64083_id); | |
208 | ||
209 | static struct i2c_driver upd64083_driver = { | |
210 | .driver = { | |
211 | .name = "upd64083", | |
212 | }, | |
213 | .probe = upd64083_probe, | |
214 | .remove = upd64083_remove, | |
215 | .id_table = upd64083_id, | |
216 | }; | |
217 | ||
218 | module_i2c_driver(upd64083_driver); |