Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[linux-2.6] / drivers / media / video / upd64083.c
1 /*
2  * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
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
9  * modify it under the terms of the GNU General Public License
10  * as published by the Free Software Foundation; either version 2
11  * of the License, or (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., 51 Franklin Street, Fifth Floor, Boston, MA
21  * 02110-1301, USA.
22  */
23
24 #include <linux/version.h>
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/i2c.h>
28 #include <linux/videodev2.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-chip-ident.h>
31 #include <media/v4l2-i2c-drv.h>
32 #include <media/upd64083.h>
33
34 MODULE_DESCRIPTION("uPD64083 driver");
35 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
36 MODULE_LICENSE("GPL");
37
38 static int debug;
39 module_param(debug, bool, 0644);
40
41 MODULE_PARM_DESC(debug, "Debug level (0-1)");
42
43
44 enum {
45         R00 = 0, R01, R02, R03, R04,
46         R05, R06, R07, R08, R09,
47         R0A, R0B, R0C, R0D, R0E, R0F,
48         R10, R11, R12, R13, R14,
49         R15, R16,
50         TOT_REGS
51 };
52
53 struct upd64083_state {
54         struct v4l2_subdev sd;
55         u8 mode;
56         u8 ext_y_adc;
57         u8 regs[TOT_REGS];
58 };
59
60 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
61 {
62         return container_of(sd, struct upd64083_state, sd);
63 }
64
65 /* Initial values when used in combination with the
66    NEC upd64031a ghost reduction chip. */
67 static u8 upd64083_init[] = {
68         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
69         0x36, 0xdd, 0x05, 0x56, 0x48,
70         0x00, 0x3a, 0xa0, 0x05, 0x08,
71         0x44, 0x60, 0x08, 0x52, 0xf8,
72         0x53, 0x60, 0x10
73 };
74
75 /* ------------------------------------------------------------------------ */
76
77 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
78 {
79         struct i2c_client *client = v4l2_get_subdevdata(sd);
80         u8 buf[2];
81
82         buf[0] = reg;
83         buf[1] = val;
84         v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
85         if (i2c_master_send(client, buf, 2) != 2)
86                 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
87 }
88
89 /* ------------------------------------------------------------------------ */
90
91 #ifdef CONFIG_VIDEO_ADV_DEBUG
92 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
93 {
94         struct i2c_client *client = v4l2_get_subdevdata(sd);
95         u8 buf[7];
96
97         if (reg >= sizeof(buf))
98                 return 0xff;
99         i2c_master_recv(client, buf, sizeof(buf));
100         return buf[reg];
101 }
102 #endif
103
104 /* ------------------------------------------------------------------------ */
105
106 static int upd64083_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
107 {
108         struct upd64083_state *state = to_state(sd);
109         u8 r00, r02;
110
111         if (route->input > 7 || (route->input & 6) == 6)
112                 return -EINVAL;
113         state->mode = (route->input & 3) << 6;
114         state->ext_y_adc = (route->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
123 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_register *reg)
124 {
125         struct i2c_client *client = v4l2_get_subdevdata(sd);
126
127         if (!v4l2_chip_match_i2c_client(client,
128                                 reg->match_type, reg->match_chip))
129                 return -EINVAL;
130         if (!capable(CAP_SYS_ADMIN))
131                 return -EPERM;
132         reg->val = upd64083_read(sd, reg->reg & 0xff);
133         return 0;
134 }
135
136 static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_register *reg)
137 {
138         struct i2c_client *client = v4l2_get_subdevdata(sd);
139
140         if (!v4l2_chip_match_i2c_client(client,
141                                 reg->match_type, reg->match_chip))
142                 return -EINVAL;
143         if (!capable(CAP_SYS_ADMIN))
144                 return -EPERM;
145         upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
146         return 0;
147 }
148 #endif
149
150 static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_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_UPD64083, 0);
155 }
156
157 static int upd64083_log_status(struct v4l2_subdev *sd)
158 {
159         struct i2c_client *client = v4l2_get_subdevdata(sd);
160         u8 buf[7];
161
162         i2c_master_recv(client, buf, 7);
163         v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
164                       "SA04=%02x SA05=%02x SA06=%02x\n",
165                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
166         return 0;
167 }
168
169 static int upd64083_command(struct i2c_client *client, unsigned cmd, void *arg)
170 {
171         return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
172 }
173
174 /* ----------------------------------------------------------------------- */
175
176 static const struct v4l2_subdev_core_ops upd64083_core_ops = {
177         .log_status = upd64083_log_status,
178         .g_chip_ident = upd64083_g_chip_ident,
179 #ifdef CONFIG_VIDEO_ADV_DEBUG
180         .g_register = upd64083_g_register,
181         .s_register = upd64083_s_register,
182 #endif
183 };
184
185 static const struct v4l2_subdev_video_ops upd64083_video_ops = {
186         .s_routing = upd64083_s_routing,
187 };
188
189 static const struct v4l2_subdev_ops upd64083_ops = {
190         .core = &upd64083_core_ops,
191         .video = &upd64083_video_ops,
192 };
193
194 /* ------------------------------------------------------------------------ */
195
196 /* i2c implementation */
197
198 static int upd64083_probe(struct i2c_client *client,
199                           const struct i2c_device_id *id)
200 {
201         struct upd64083_state *state;
202         struct v4l2_subdev *sd;
203         int i;
204
205         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
206                 return -EIO;
207
208         v4l_info(client, "chip found @ 0x%x (%s)\n",
209                         client->addr << 1, client->adapter->name);
210
211         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
212         if (state == NULL)
213                 return -ENOMEM;
214         sd = &state->sd;
215         v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
216         /* Initially assume that a ghost reduction chip is present */
217         state->mode = 0;  /* YCS mode */
218         state->ext_y_adc = (1 << 5);
219         memcpy(state->regs, upd64083_init, TOT_REGS);
220         for (i = 0; i < TOT_REGS; i++)
221                 upd64083_write(sd, i, state->regs[i]);
222         return 0;
223 }
224
225 static int upd64083_remove(struct i2c_client *client)
226 {
227         struct v4l2_subdev *sd = i2c_get_clientdata(client);
228
229         v4l2_device_unregister_subdev(sd);
230         kfree(to_state(sd));
231         return 0;
232 }
233
234 /* ----------------------------------------------------------------------- */
235
236 static const struct i2c_device_id upd64083_id[] = {
237         { "upd64083", 0 },
238         { }
239 };
240 MODULE_DEVICE_TABLE(i2c, upd64083_id);
241
242 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
243         .name = "upd64083",
244         .driverid = I2C_DRIVERID_UPD64083,
245         .command = upd64083_command,
246         .probe = upd64083_probe,
247         .remove = upd64083_remove,
248         .id_table = upd64083_id,
249 };