1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
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
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/i2c.h>
14 #include <linux/videodev2.h>
15 #include <linux/slab.h>
16 #include <media/v4l2-device.h>
17 #include <media/i2c/upd64031a.h>
18
19 /* --------------------- read registers functions define -------------------- */
20
21 /* bit masks */
22 #define GR_MODE_MASK 0xc0
23 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
24 #define SYNC_CIRCUIT_MASK 0xa0
25
26 /* -------------------------------------------------------------------------- */
27
28 MODULE_DESCRIPTION("uPD64031A driver");
29 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
30 MODULE_LICENSE("GPL");
31
32 static int debug;
33 module_param(debug, int, 0644);
34
35 MODULE_PARM_DESC(debug, "Debug level (0-1)");
36
37
38 enum {
39 R00 = 0, R01, R02, R03, R04,
40 R05, R06, R07, R08, R09,
41 R0A, R0B, R0C, R0D, R0E, R0F,
42 /* unused registers
43 R10, R11, R12, R13, R14,
44 R15, R16, R17,
45 */
46 TOT_REGS
47 };
48
49 struct upd64031a_state {
50 struct v4l2_subdev sd;
51 u8 regs[TOT_REGS];
52 u8 gr_mode;
53 u8 direct_3dycs_connect;
54 u8 ext_comp_sync;
55 u8 ext_vert_sync;
56 };
57
to_state(struct v4l2_subdev * sd)58 static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
59 {
60 return container_of(sd, struct upd64031a_state, sd);
61 }
62
63 static u8 upd64031a_init[] = {
64 0x00, 0xb8, 0x48, 0xd2, 0xe6,
65 0x03, 0x10, 0x0b, 0xaf, 0x7f,
66 0x00, 0x00, 0x1d, 0x5e, 0x00,
67 0xd0
68 };
69
70 /* ------------------------------------------------------------------------ */
71
upd64031a_read(struct v4l2_subdev * sd,u8 reg)72 static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
73 {
74 struct i2c_client *client = v4l2_get_subdevdata(sd);
75 u8 buf[2];
76
77 if (reg >= sizeof(buf))
78 return 0xff;
79 i2c_master_recv(client, buf, 2);
80 return buf[reg];
81 }
82
83 /* ------------------------------------------------------------------------ */
84
upd64031a_write(struct v4l2_subdev * sd,u8 reg,u8 val)85 static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
86 {
87 struct i2c_client *client = v4l2_get_subdevdata(sd);
88 u8 buf[2];
89
90 buf[0] = reg;
91 buf[1] = val;
92 v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
93 if (i2c_master_send(client, buf, 2) != 2)
94 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
95 }
96
97 /* ------------------------------------------------------------------------ */
98
99 /* The input changed due to new input or channel changed */
upd64031a_s_frequency(struct v4l2_subdev * sd,const struct v4l2_frequency * freq)100 static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)
101 {
102 struct upd64031a_state *state = to_state(sd);
103 u8 reg = state->regs[R00];
104
105 v4l2_dbg(1, debug, sd, "changed input or channel\n");
106 upd64031a_write(sd, R00, reg | 0x10);
107 upd64031a_write(sd, R00, reg & ~0x10);
108 return 0;
109 }
110
111 /* ------------------------------------------------------------------------ */
112
upd64031a_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)113 static int upd64031a_s_routing(struct v4l2_subdev *sd,
114 u32 input, u32 output, u32 config)
115 {
116 struct upd64031a_state *state = to_state(sd);
117 u8 r00, r05, r08;
118
119 state->gr_mode = (input & 3) << 6;
120 state->direct_3dycs_connect = (input & 0xc) << 4;
121 state->ext_comp_sync =
122 (input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
123 state->ext_vert_sync =
124 (input & UPD64031A_VERTICAL_EXTERNAL) << 2;
125 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
126 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
127 state->ext_comp_sync | state->ext_vert_sync;
128 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
129 state->direct_3dycs_connect;
130 upd64031a_write(sd, R00, r00);
131 upd64031a_write(sd, R05, r05);
132 upd64031a_write(sd, R08, r08);
133 return upd64031a_s_frequency(sd, NULL);
134 }
135
upd64031a_log_status(struct v4l2_subdev * sd)136 static int upd64031a_log_status(struct v4l2_subdev *sd)
137 {
138 v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
139 upd64031a_read(sd, 0), upd64031a_read(sd, 1));
140 return 0;
141 }
142
143 #ifdef CONFIG_VIDEO_ADV_DEBUG
upd64031a_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)144 static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
145 {
146 reg->val = upd64031a_read(sd, reg->reg & 0xff);
147 reg->size = 1;
148 return 0;
149 }
150
upd64031a_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)151 static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
152 {
153 upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
154 return 0;
155 }
156 #endif
157
158 /* ----------------------------------------------------------------------- */
159
160 static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
161 .log_status = upd64031a_log_status,
162 #ifdef CONFIG_VIDEO_ADV_DEBUG
163 .g_register = upd64031a_g_register,
164 .s_register = upd64031a_s_register,
165 #endif
166 };
167
168 static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
169 .s_frequency = upd64031a_s_frequency,
170 };
171
172 static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
173 .s_routing = upd64031a_s_routing,
174 };
175
176 static const struct v4l2_subdev_ops upd64031a_ops = {
177 .core = &upd64031a_core_ops,
178 .tuner = &upd64031a_tuner_ops,
179 .video = &upd64031a_video_ops,
180 };
181
182 /* ------------------------------------------------------------------------ */
183
184 /* i2c implementation */
185
upd64031a_probe(struct i2c_client * client)186 static int upd64031a_probe(struct i2c_client *client)
187 {
188 struct upd64031a_state *state;
189 struct v4l2_subdev *sd;
190 int i;
191
192 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
193 return -EIO;
194
195 v4l_info(client, "chip found @ 0x%x (%s)\n",
196 client->addr << 1, client->adapter->name);
197
198 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
199 if (state == NULL)
200 return -ENOMEM;
201 sd = &state->sd;
202 v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
203 memcpy(state->regs, upd64031a_init, sizeof(state->regs));
204 state->gr_mode = UPD64031A_GR_ON << 6;
205 state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
206 state->ext_comp_sync = state->ext_vert_sync = 0;
207 for (i = 0; i < TOT_REGS; i++)
208 upd64031a_write(sd, i, state->regs[i]);
209 return 0;
210 }
211
upd64031a_remove(struct i2c_client * client)212 static void upd64031a_remove(struct i2c_client *client)
213 {
214 struct v4l2_subdev *sd = i2c_get_clientdata(client);
215
216 v4l2_device_unregister_subdev(sd);
217 }
218
219 /* ----------------------------------------------------------------------- */
220
221 static const struct i2c_device_id upd64031a_id[] = {
222 { "upd64031a" },
223 { }
224 };
225 MODULE_DEVICE_TABLE(i2c, upd64031a_id);
226
227 static struct i2c_driver upd64031a_driver = {
228 .driver = {
229 .name = "upd64031a",
230 },
231 .probe = upd64031a_probe,
232 .remove = upd64031a_remove,
233 .id_table = upd64031a_id,
234 };
235
236 module_i2c_driver(upd64031a_driver);
237