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24#include <linux/module.h>
25#include <linux/kernel.h>
26#include <linux/i2c.h>
27#include <linux/videodev2.h>
28#include <media/v4l2-device.h>
29#include <media/v4l2-chip-ident.h>
30#include <media/v4l2-i2c-drv.h>
31#include <media/upd64083.h>
32
33MODULE_DESCRIPTION("uPD64083 driver");
34MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
35MODULE_LICENSE("GPL");
36
37static int debug;
38module_param(debug, bool, 0644);
39
40MODULE_PARM_DESC(debug, "Debug level (0-1)");
41
42
43enum {
44 R00 = 0, R01, R02, R03, R04,
45 R05, R06, R07, R08, R09,
46 R0A, R0B, R0C, R0D, R0E, R0F,
47 R10, R11, R12, R13, R14,
48 R15, R16,
49 TOT_REGS
50};
51
52struct upd64083_state {
53 struct v4l2_subdev sd;
54 u8 mode;
55 u8 ext_y_adc;
56 u8 regs[TOT_REGS];
57};
58
59static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
60{
61 return container_of(sd, struct upd64083_state, sd);
62}
63
64
65
66static u8 upd64083_init[] = {
67 0x1f, 0x01, 0xa0, 0x2d, 0x29,
68 0x36, 0xdd, 0x05, 0x56, 0x48,
69 0x00, 0x3a, 0xa0, 0x05, 0x08,
70 0x44, 0x60, 0x08, 0x52, 0xf8,
71 0x53, 0x60, 0x10
72};
73
74
75
76static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
77{
78 struct i2c_client *client = v4l2_get_subdevdata(sd);
79 u8 buf[2];
80
81 buf[0] = reg;
82 buf[1] = val;
83 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
84 if (i2c_master_send(client, buf, 2) != 2)
85 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
86}
87
88
89
90#ifdef CONFIG_VIDEO_ADV_DEBUG
91static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
92{
93 struct i2c_client *client = v4l2_get_subdevdata(sd);
94 u8 buf[7];
95
96 if (reg >= sizeof(buf))
97 return 0xff;
98 i2c_master_recv(client, buf, sizeof(buf));
99 return buf[reg];
100}
101#endif
102
103
104
105static int upd64083_s_routing(struct v4l2_subdev *sd,
106 u32 input, u32 output, u32 config)
107{
108 struct upd64083_state *state = to_state(sd);
109 u8 r00, r02;
110
111 if (input > 7 || (input & 6) == 6)
112 return -EINVAL;
113 state->mode = (input & 3) << 6;
114 state->ext_y_adc = (input & UPD64083_EXT_Y_ADC) << 3;
115 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
116 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
117 upd64083_write(sd, R00, r00);
118 upd64083_write(sd, R02, r02);
119 return 0;
120}
121
122#ifdef CONFIG_VIDEO_ADV_DEBUG
123static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
124{
125 struct i2c_client *client = v4l2_get_subdevdata(sd);
126
127 if (!v4l2_chip_match_i2c_client(client, ®->match))
128 return -EINVAL;
129 if (!capable(CAP_SYS_ADMIN))
130 return -EPERM;
131 reg->val = upd64083_read(sd, reg->reg & 0xff);
132 reg->size = 1;
133 return 0;
134}
135
136static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
137{
138 struct i2c_client *client = v4l2_get_subdevdata(sd);
139
140 if (!v4l2_chip_match_i2c_client(client, ®->match))
141 return -EINVAL;
142 if (!capable(CAP_SYS_ADMIN))
143 return -EPERM;
144 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
145 return 0;
146}
147#endif
148
149static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
150{
151 struct i2c_client *client = v4l2_get_subdevdata(sd);
152
153 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
154}
155
156static int upd64083_log_status(struct v4l2_subdev *sd)
157{
158 struct i2c_client *client = v4l2_get_subdevdata(sd);
159 u8 buf[7];
160
161 i2c_master_recv(client, buf, 7);
162 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
163 "SA04=%02x SA05=%02x SA06=%02x\n",
164 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
165 return 0;
166}
167
168
169
170static const struct v4l2_subdev_core_ops upd64083_core_ops = {
171 .log_status = upd64083_log_status,
172 .g_chip_ident = upd64083_g_chip_ident,
173#ifdef CONFIG_VIDEO_ADV_DEBUG
174 .g_register = upd64083_g_register,
175 .s_register = upd64083_s_register,
176#endif
177};
178
179static const struct v4l2_subdev_video_ops upd64083_video_ops = {
180 .s_routing = upd64083_s_routing,
181};
182
183static const struct v4l2_subdev_ops upd64083_ops = {
184 .core = &upd64083_core_ops,
185 .video = &upd64083_video_ops,
186};
187
188
189
190
191
192static int upd64083_probe(struct i2c_client *client,
193 const struct i2c_device_id *id)
194{
195 struct upd64083_state *state;
196 struct v4l2_subdev *sd;
197 int i;
198
199 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
200 return -EIO;
201
202 v4l_info(client, "chip found @ 0x%x (%s)\n",
203 client->addr << 1, client->adapter->name);
204
205 state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
206 if (state == NULL)
207 return -ENOMEM;
208 sd = &state->sd;
209 v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
210
211 state->mode = 0;
212 state->ext_y_adc = (1 << 5);
213 memcpy(state->regs, upd64083_init, TOT_REGS);
214 for (i = 0; i < TOT_REGS; i++)
215 upd64083_write(sd, i, state->regs[i]);
216 return 0;
217}
218
219static int upd64083_remove(struct i2c_client *client)
220{
221 struct v4l2_subdev *sd = i2c_get_clientdata(client);
222
223 v4l2_device_unregister_subdev(sd);
224 kfree(to_state(sd));
225 return 0;
226}
227
228
229
230static const struct i2c_device_id upd64083_id[] = {
231 { "upd64083", 0 },
232 { }
233};
234MODULE_DEVICE_TABLE(i2c, upd64083_id);
235
236static struct v4l2_i2c_driver_data v4l2_i2c_data = {
237 .name = "upd64083",
238 .probe = upd64083_probe,
239 .remove = upd64083_remove,
240 .id_table = upd64083_id,
241};
242