V4L/DVB (12135): Add a driver for mt9v011 sensor
[linux-2.6.git] / drivers / media / video / upd64031a.c
1 /*
2  * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
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 modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (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  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  */
22
23
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/upd64031a.h>
32
33 /* --------------------- read registers functions define -------------------- */
34
35 /* bit masks */
36 #define GR_MODE_MASK              0xc0
37 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
38 #define SYNC_CIRCUIT_MASK         0xa0
39
40 /* -------------------------------------------------------------------------- */
41
42 MODULE_DESCRIPTION("uPD64031A driver");
43 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
44 MODULE_LICENSE("GPL");
45
46 static int debug;
47 module_param(debug, int, 0644);
48
49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
50
51
52 enum {
53         R00 = 0, R01, R02, R03, R04,
54         R05, R06, R07, R08, R09,
55         R0A, R0B, R0C, R0D, R0E, R0F,
56         /* unused registers
57          R10, R11, R12, R13, R14,
58          R15, R16, R17,
59          */
60         TOT_REGS
61 };
62
63 struct upd64031a_state {
64         struct v4l2_subdev sd;
65         u8 regs[TOT_REGS];
66         u8 gr_mode;
67         u8 direct_3dycs_connect;
68         u8 ext_comp_sync;
69         u8 ext_vert_sync;
70 };
71
72 static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd)
73 {
74         return container_of(sd, struct upd64031a_state, sd);
75 }
76
77 static u8 upd64031a_init[] = {
78         0x00, 0xb8, 0x48, 0xd2, 0xe6,
79         0x03, 0x10, 0x0b, 0xaf, 0x7f,
80         0x00, 0x00, 0x1d, 0x5e, 0x00,
81         0xd0
82 };
83
84 /* ------------------------------------------------------------------------ */
85
86 static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg)
87 {
88         struct i2c_client *client = v4l2_get_subdevdata(sd);
89         u8 buf[2];
90
91         if (reg >= sizeof(buf))
92                 return 0xff;
93         i2c_master_recv(client, buf, 2);
94         return buf[reg];
95 }
96
97 /* ------------------------------------------------------------------------ */
98
99 static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val)
100 {
101         struct i2c_client *client = v4l2_get_subdevdata(sd);
102         u8 buf[2];
103
104         buf[0] = reg;
105         buf[1] = val;
106         v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val);
107         if (i2c_master_send(client, buf, 2) != 2)
108                 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
109 }
110
111 /* ------------------------------------------------------------------------ */
112
113 /* The input changed due to new input or channel changed */
114 static int upd64031a_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
115 {
116         struct upd64031a_state *state = to_state(sd);
117         u8 reg = state->regs[R00];
118
119         v4l2_dbg(1, debug, sd, "changed input or channel\n");
120         upd64031a_write(sd, R00, reg | 0x10);
121         upd64031a_write(sd, R00, reg & ~0x10);
122         return 0;
123 }
124
125 /* ------------------------------------------------------------------------ */
126
127 static int upd64031a_s_routing(struct v4l2_subdev *sd,
128                                u32 input, u32 output, u32 config)
129 {
130         struct upd64031a_state *state = to_state(sd);
131         u8 r00, r05, r08;
132
133         state->gr_mode = (input & 3) << 6;
134         state->direct_3dycs_connect = (input & 0xc) << 4;
135         state->ext_comp_sync =
136                 (input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
137         state->ext_vert_sync =
138                 (input & UPD64031A_VERTICAL_EXTERNAL) << 2;
139         r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
140         r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
141                 state->ext_comp_sync | state->ext_vert_sync;
142         r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
143                 state->direct_3dycs_connect;
144         upd64031a_write(sd, R00, r00);
145         upd64031a_write(sd, R05, r05);
146         upd64031a_write(sd, R08, r08);
147         return upd64031a_s_frequency(sd, NULL);
148 }
149
150 static int upd64031a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
151 {
152         struct i2c_client *client = v4l2_get_subdevdata(sd);
153
154         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64031A, 0);
155 }
156
157 static int upd64031a_log_status(struct v4l2_subdev *sd)
158 {
159         v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n",
160                         upd64031a_read(sd, 0), upd64031a_read(sd, 1));
161         return 0;
162 }
163
164 #ifdef CONFIG_VIDEO_ADV_DEBUG
165 static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
166 {
167         struct i2c_client *client = v4l2_get_subdevdata(sd);
168
169         if (!v4l2_chip_match_i2c_client(client, &reg->match))
170                 return -EINVAL;
171         if (!capable(CAP_SYS_ADMIN))
172                 return -EPERM;
173         reg->val = upd64031a_read(sd, reg->reg & 0xff);
174         reg->size = 1;
175         return 0;
176 }
177
178 static int upd64031a_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
179 {
180         struct i2c_client *client = v4l2_get_subdevdata(sd);
181
182         if (!v4l2_chip_match_i2c_client(client, &reg->match))
183                 return -EINVAL;
184         if (!capable(CAP_SYS_ADMIN))
185                 return -EPERM;
186         upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff);
187         return 0;
188 }
189 #endif
190
191 /* ----------------------------------------------------------------------- */
192
193 static const struct v4l2_subdev_core_ops upd64031a_core_ops = {
194         .log_status = upd64031a_log_status,
195         .g_chip_ident = upd64031a_g_chip_ident,
196 #ifdef CONFIG_VIDEO_ADV_DEBUG
197         .g_register = upd64031a_g_register,
198         .s_register = upd64031a_s_register,
199 #endif
200 };
201
202 static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = {
203         .s_frequency = upd64031a_s_frequency,
204 };
205
206 static const struct v4l2_subdev_video_ops upd64031a_video_ops = {
207         .s_routing = upd64031a_s_routing,
208 };
209
210 static const struct v4l2_subdev_ops upd64031a_ops = {
211         .core = &upd64031a_core_ops,
212         .tuner = &upd64031a_tuner_ops,
213         .video = &upd64031a_video_ops,
214 };
215
216 /* ------------------------------------------------------------------------ */
217
218 /* i2c implementation */
219
220 static int upd64031a_probe(struct i2c_client *client,
221                            const struct i2c_device_id *id)
222 {
223         struct upd64031a_state *state;
224         struct v4l2_subdev *sd;
225         int i;
226
227         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
228                 return -EIO;
229
230         v4l_info(client, "chip found @ 0x%x (%s)\n",
231                         client->addr << 1, client->adapter->name);
232
233         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
234         if (state == NULL)
235                 return -ENOMEM;
236         sd = &state->sd;
237         v4l2_i2c_subdev_init(sd, client, &upd64031a_ops);
238         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
239         state->gr_mode = UPD64031A_GR_ON << 6;
240         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
241         state->ext_comp_sync = state->ext_vert_sync = 0;
242         for (i = 0; i < TOT_REGS; i++)
243                 upd64031a_write(sd, i, state->regs[i]);
244         return 0;
245 }
246
247 static int upd64031a_remove(struct i2c_client *client)
248 {
249         struct v4l2_subdev *sd = i2c_get_clientdata(client);
250
251         v4l2_device_unregister_subdev(sd);
252         kfree(to_state(sd));
253         return 0;
254 }
255
256 /* ----------------------------------------------------------------------- */
257
258 static const struct i2c_device_id upd64031a_id[] = {
259         { "upd64031a", 0 },
260         { }
261 };
262 MODULE_DEVICE_TABLE(i2c, upd64031a_id);
263
264 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
265         .name = "upd64031a",
266         .probe = upd64031a_probe,
267         .remove = upd64031a_remove,
268         .id_table = upd64031a_id,
269 };