1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver |
4 | * |
5 | * 2003 by T.Adachi (tadachi@tadachi-net.com) |
6 | * 2003 by Takeru KOMORIYA <komoriya@paken.org> |
7 | * 2006 by Hans Verkuil <hverkuil@xs4all.nl> |
8 | */ |
9 | |
10 | #include <linux/module.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/i2c.h> |
13 | #include <linux/videodev2.h> |
14 | #include <linux/slab.h> |
15 | #include <media/v4l2-device.h> |
16 | #include <media/i2c/upd64083.h> |
17 | |
18 | MODULE_DESCRIPTION("uPD64083 driver" ); |
19 | MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil" ); |
20 | MODULE_LICENSE("GPL" ); |
21 | |
22 | static bool debug; |
23 | module_param(debug, bool, 0644); |
24 | |
25 | MODULE_PARM_DESC(debug, "Debug level (0-1)" ); |
26 | |
27 | |
28 | enum { |
29 | R00 = 0, R01, R02, R03, R04, |
30 | R05, R06, R07, R08, R09, |
31 | R0A, R0B, R0C, R0D, R0E, R0F, |
32 | R10, R11, R12, R13, R14, |
33 | R15, R16, |
34 | TOT_REGS |
35 | }; |
36 | |
37 | struct upd64083_state { |
38 | struct v4l2_subdev sd; |
39 | u8 mode; |
40 | u8 ext_y_adc; |
41 | u8 regs[TOT_REGS]; |
42 | }; |
43 | |
44 | static inline struct upd64083_state *to_state(struct v4l2_subdev *sd) |
45 | { |
46 | return container_of(sd, struct upd64083_state, sd); |
47 | } |
48 | |
49 | /* Initial values when used in combination with the |
50 | NEC upd64031a ghost reduction chip. */ |
51 | static u8 upd64083_init[] = { |
52 | 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */ |
53 | 0x36, 0xdd, 0x05, 0x56, 0x48, |
54 | 0x00, 0x3a, 0xa0, 0x05, 0x08, |
55 | 0x44, 0x60, 0x08, 0x52, 0xf8, |
56 | 0x53, 0x60, 0x10 |
57 | }; |
58 | |
59 | /* ------------------------------------------------------------------------ */ |
60 | |
61 | static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val) |
62 | { |
63 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
64 | u8 buf[2]; |
65 | |
66 | buf[0] = reg; |
67 | buf[1] = val; |
68 | v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n" , reg, val); |
69 | if (i2c_master_send(client, buf, count: 2) != 2) |
70 | v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n" , reg, val); |
71 | } |
72 | |
73 | /* ------------------------------------------------------------------------ */ |
74 | |
75 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
76 | static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg) |
77 | { |
78 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
79 | u8 buf[7]; |
80 | |
81 | if (reg >= sizeof(buf)) |
82 | return 0xff; |
83 | i2c_master_recv(client, buf, count: sizeof(buf)); |
84 | return buf[reg]; |
85 | } |
86 | #endif |
87 | |
88 | /* ------------------------------------------------------------------------ */ |
89 | |
90 | static int upd64083_s_routing(struct v4l2_subdev *sd, |
91 | u32 input, u32 output, u32 config) |
92 | { |
93 | struct upd64083_state *state = to_state(sd); |
94 | u8 r00, r02; |
95 | |
96 | if (input > 7 || (input & 6) == 6) |
97 | return -EINVAL; |
98 | state->mode = (input & 3) << 6; |
99 | state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3; |
100 | r00 = (state->regs[R00] & ~(3 << 6)) | state->mode; |
101 | r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc; |
102 | upd64083_write(sd, reg: R00, val: r00); |
103 | upd64083_write(sd, reg: R02, val: r02); |
104 | return 0; |
105 | } |
106 | |
107 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
108 | static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
109 | { |
110 | reg->val = upd64083_read(sd, reg: reg->reg & 0xff); |
111 | reg->size = 1; |
112 | return 0; |
113 | } |
114 | |
115 | static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) |
116 | { |
117 | upd64083_write(sd, reg: reg->reg & 0xff, val: reg->val & 0xff); |
118 | return 0; |
119 | } |
120 | #endif |
121 | |
122 | static int upd64083_log_status(struct v4l2_subdev *sd) |
123 | { |
124 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
125 | u8 buf[7]; |
126 | |
127 | i2c_master_recv(client, buf, count: 7); |
128 | v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x " |
129 | "SA04=%02x SA05=%02x SA06=%02x\n" , |
130 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
131 | return 0; |
132 | } |
133 | |
134 | /* ----------------------------------------------------------------------- */ |
135 | |
136 | static const struct v4l2_subdev_core_ops upd64083_core_ops = { |
137 | .log_status = upd64083_log_status, |
138 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
139 | .g_register = upd64083_g_register, |
140 | .s_register = upd64083_s_register, |
141 | #endif |
142 | }; |
143 | |
144 | static const struct v4l2_subdev_video_ops upd64083_video_ops = { |
145 | .s_routing = upd64083_s_routing, |
146 | }; |
147 | |
148 | static const struct v4l2_subdev_ops upd64083_ops = { |
149 | .core = &upd64083_core_ops, |
150 | .video = &upd64083_video_ops, |
151 | }; |
152 | |
153 | /* ------------------------------------------------------------------------ */ |
154 | |
155 | /* i2c implementation */ |
156 | |
157 | static int upd64083_probe(struct i2c_client *client) |
158 | { |
159 | struct upd64083_state *state; |
160 | struct v4l2_subdev *sd; |
161 | int i; |
162 | |
163 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
164 | return -EIO; |
165 | |
166 | v4l_info(client, "chip found @ 0x%x (%s)\n" , |
167 | client->addr << 1, client->adapter->name); |
168 | |
169 | state = devm_kzalloc(dev: &client->dev, size: sizeof(*state), GFP_KERNEL); |
170 | if (state == NULL) |
171 | return -ENOMEM; |
172 | sd = &state->sd; |
173 | v4l2_i2c_subdev_init(sd, client, ops: &upd64083_ops); |
174 | /* Initially assume that a ghost reduction chip is present */ |
175 | state->mode = 0; /* YCS mode */ |
176 | state->ext_y_adc = (1 << 5); |
177 | memcpy(state->regs, upd64083_init, TOT_REGS); |
178 | for (i = 0; i < TOT_REGS; i++) |
179 | upd64083_write(sd, reg: i, val: state->regs[i]); |
180 | return 0; |
181 | } |
182 | |
183 | static void upd64083_remove(struct i2c_client *client) |
184 | { |
185 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
186 | |
187 | v4l2_device_unregister_subdev(sd); |
188 | } |
189 | |
190 | /* ----------------------------------------------------------------------- */ |
191 | |
192 | static const struct i2c_device_id upd64083_id[] = { |
193 | { "upd64083" , 0 }, |
194 | { } |
195 | }; |
196 | MODULE_DEVICE_TABLE(i2c, upd64083_id); |
197 | |
198 | static struct i2c_driver upd64083_driver = { |
199 | .driver = { |
200 | .name = "upd64083" , |
201 | }, |
202 | .probe = upd64083_probe, |
203 | .remove = upd64083_remove, |
204 | .id_table = upd64083_id, |
205 | }; |
206 | |
207 | module_i2c_driver(upd64083_driver); |
208 | |