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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
20
21
22#define GR_MODE_MASK 0xc0
23#define DIRECT_3DYCS_CONNECT_MASK 0xc0
24#define SYNC_CIRCUIT_MASK 0xa0
25
26
27
28MODULE_DESCRIPTION("uPD64031A driver");
29MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
30MODULE_LICENSE("GPL");
31
32static int debug;
33module_param(debug, int, 0644);
34
35MODULE_PARM_DESC(debug, "Debug level (0-1)");
36
37
38enum {
39 R00 = 0, R01, R02, R03, R04,
40 R05, R06, R07, R08, R09,
41 R0A, R0B, R0C, R0D, R0E, R0F,
42
43
44
45
46 TOT_REGS
47};
48
49struct 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
58static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
59{
60 return container_of(sd, struct upd64031a_state, sd);
61}
62
63static 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
72static 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
85static 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
100static 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
113static 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
136static 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
144static 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
151static 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
160static 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
168static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
169 .s_frequency = upd64031a_s_frequency,
170};
171
172static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
173 .s_routing = upd64031a_s_routing,
174};
175
176static 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
185
186static int upd64031a_probe(struct i2c_client *client,
187 const struct i2c_device_id *id)
188{
189 struct upd64031a_state *state;
190 struct v4l2_subdev *sd;
191 int i;
192
193 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
194 return -EIO;
195
196 v4l_info(client, "chip found @ 0x%x (%s)\n",
197 client->addr << 1, client->adapter->name);
198
199 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
200 if (state == NULL)
201 return -ENOMEM;
202 sd = &state->sd;
203 v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
204 memcpy(state->regs, upd64031a_init, sizeof(state->regs));
205 state->gr_mode = UPD64031A_GR_ON << 6;
206 state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
207 state->ext_comp_sync = state->ext_vert_sync = 0;
208 for (i = 0; i < TOT_REGS; i++)
209 upd64031a_write(sd, i, state->regs[i]);
210 return 0;
211}
212
213static int upd64031a_remove(struct i2c_client *client)
214{
215 struct v4l2_subdev *sd = i2c_get_clientdata(client);
216
217 v4l2_device_unregister_subdev(sd);
218 return 0;
219}
220
221
222
223static const struct i2c_device_id upd64031a_id[] = {
224 { "upd64031a", 0 },
225 { }
226};
227MODULE_DEVICE_TABLE(i2c, upd64031a_id);
228
229static struct i2c_driver upd64031a_driver = {
230 .driver = {
231 .name = "upd64031a",
232 },
233 .probe = upd64031a_probe,
234 .remove = upd64031a_remove,
235 .id_table = upd64031a_id,
236};
237
238module_i2c_driver(upd64031a_driver);
239
