Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input
[linux-2.6] / drivers / media / video / sn9c102 / sn9c102_hv7131d.c
1 /***************************************************************************
2  * Plug-in for HV7131D image sensor connected to the SN9C1xx PC Camera     *
3  * Controllers                                                             *
4  *                                                                         *
5  * Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it>  *
6  *                                                                         *
7  * This program is free software; you can redistribute it and/or modify    *
8  * it under the terms of the GNU General Public License as published by    *
9  * the Free Software Foundation; either version 2 of the License, or       *
10  * (at your option) any later version.                                     *
11  *                                                                         *
12  * This program is distributed in the hope that it will be useful,         *
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
15  * GNU General Public License for more details.                            *
16  *                                                                         *
17  * You should have received a copy of the GNU General Public License       *
18  * along with this program; if not, write to the Free Software             *
19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
20  ***************************************************************************/
21
22 #include "sn9c102_sensor.h"
23
24
25 static struct sn9c102_sensor hv7131d;
26
27
28 static int hv7131d_init(struct sn9c102_device* cam)
29 {
30         int err = 0;
31
32         err += sn9c102_write_reg(cam, 0x00, 0x10);
33         err += sn9c102_write_reg(cam, 0x00, 0x11);
34         err += sn9c102_write_reg(cam, 0x00, 0x14);
35         err += sn9c102_write_reg(cam, 0x60, 0x17);
36         err += sn9c102_write_reg(cam, 0x0e, 0x18);
37         err += sn9c102_write_reg(cam, 0xf2, 0x19);
38
39         err += sn9c102_i2c_write(cam, 0x01, 0x04);
40         err += sn9c102_i2c_write(cam, 0x02, 0x00);
41         err += sn9c102_i2c_write(cam, 0x28, 0x00);
42
43         return err;
44 }
45
46
47 static int hv7131d_get_ctrl(struct sn9c102_device* cam,
48                             struct v4l2_control* ctrl)
49 {
50         switch (ctrl->id) {
51         case V4L2_CID_EXPOSURE:
52                 {
53                         int r1 = sn9c102_i2c_read(cam, 0x26),
54                             r2 = sn9c102_i2c_read(cam, 0x27);
55                         if (r1 < 0 || r2 < 0)
56                                 return -EIO;
57                         ctrl->value = (r1 << 8) | (r2 & 0xff);
58                 }
59                 return 0;
60         case V4L2_CID_RED_BALANCE:
61                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x31)) < 0)
62                         return -EIO;
63                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
64                 return 0;
65         case V4L2_CID_BLUE_BALANCE:
66                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x33)) < 0)
67                         return -EIO;
68                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
69                 return 0;
70         case SN9C102_V4L2_CID_GREEN_BALANCE:
71                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x32)) < 0)
72                         return -EIO;
73                 ctrl->value = 0x3f - (ctrl->value & 0x3f);
74                 return 0;
75         case SN9C102_V4L2_CID_RESET_LEVEL:
76                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x30)) < 0)
77                         return -EIO;
78                 ctrl->value &= 0x3f;
79                 return 0;
80         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
81                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x34)) < 0)
82                         return -EIO;
83                 ctrl->value &= 0x07;
84                 return 0;
85         default:
86                 return -EINVAL;
87         }
88 }
89
90
91 static int hv7131d_set_ctrl(struct sn9c102_device* cam,
92                             const struct v4l2_control* ctrl)
93 {
94         int err = 0;
95
96         switch (ctrl->id) {
97         case V4L2_CID_EXPOSURE:
98                 err += sn9c102_i2c_write(cam, 0x26, ctrl->value >> 8);
99                 err += sn9c102_i2c_write(cam, 0x27, ctrl->value & 0xff);
100                 break;
101         case V4L2_CID_RED_BALANCE:
102                 err += sn9c102_i2c_write(cam, 0x31, 0x3f - ctrl->value);
103                 break;
104         case V4L2_CID_BLUE_BALANCE:
105                 err += sn9c102_i2c_write(cam, 0x33, 0x3f - ctrl->value);
106                 break;
107         case SN9C102_V4L2_CID_GREEN_BALANCE:
108                 err += sn9c102_i2c_write(cam, 0x32, 0x3f - ctrl->value);
109                 break;
110         case SN9C102_V4L2_CID_RESET_LEVEL:
111                 err += sn9c102_i2c_write(cam, 0x30, ctrl->value);
112                 break;
113         case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
114                 err += sn9c102_i2c_write(cam, 0x34, ctrl->value);
115                 break;
116         default:
117                 return -EINVAL;
118         }
119
120         return err ? -EIO : 0;
121 }
122
123
124 static int hv7131d_set_crop(struct sn9c102_device* cam,
125                             const struct v4l2_rect* rect)
126 {
127         struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
128         int err = 0;
129         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 2,
130            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;
131
132         err += sn9c102_write_reg(cam, h_start, 0x12);
133         err += sn9c102_write_reg(cam, v_start, 0x13);
134
135         return err;
136 }
137
138
139 static int hv7131d_set_pix_format(struct sn9c102_device* cam,
140                                   const struct v4l2_pix_format* pix)
141 {
142         int err = 0;
143
144         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
145                 err += sn9c102_write_reg(cam, 0x42, 0x19);
146         else
147                 err += sn9c102_write_reg(cam, 0xf2, 0x19);
148
149         return err;
150 }
151
152
153 static struct sn9c102_sensor hv7131d = {
154         .name = "HV7131D",
155         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
156         .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102 | BRIDGE_SN9C103,
157         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
158         .frequency = SN9C102_I2C_100KHZ,
159         .interface = SN9C102_I2C_2WIRES,
160         .i2c_slave_id = 0x11,
161         .init = &hv7131d_init,
162         .qctrl = {
163                 {
164                         .id = V4L2_CID_EXPOSURE,
165                         .type = V4L2_CTRL_TYPE_INTEGER,
166                         .name = "exposure",
167                         .minimum = 0x0250,
168                         .maximum = 0xffff,
169                         .step = 0x0001,
170                         .default_value = 0x0250,
171                         .flags = 0,
172                 },
173                 {
174                         .id = V4L2_CID_RED_BALANCE,
175                         .type = V4L2_CTRL_TYPE_INTEGER,
176                         .name = "red balance",
177                         .minimum = 0x00,
178                         .maximum = 0x3f,
179                         .step = 0x01,
180                         .default_value = 0x00,
181                         .flags = 0,
182                 },
183                 {
184                         .id = V4L2_CID_BLUE_BALANCE,
185                         .type = V4L2_CTRL_TYPE_INTEGER,
186                         .name = "blue balance",
187                         .minimum = 0x00,
188                         .maximum = 0x3f,
189                         .step = 0x01,
190                         .default_value = 0x20,
191                         .flags = 0,
192                 },
193                 {
194                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
195                         .type = V4L2_CTRL_TYPE_INTEGER,
196                         .name = "green balance",
197                         .minimum = 0x00,
198                         .maximum = 0x3f,
199                         .step = 0x01,
200                         .default_value = 0x1e,
201                         .flags = 0,
202                 },
203                 {
204                         .id = SN9C102_V4L2_CID_RESET_LEVEL,
205                         .type = V4L2_CTRL_TYPE_INTEGER,
206                         .name = "reset level",
207                         .minimum = 0x19,
208                         .maximum = 0x3f,
209                         .step = 0x01,
210                         .default_value = 0x30,
211                         .flags = 0,
212                 },
213                 {
214                         .id = SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE,
215                         .type = V4L2_CTRL_TYPE_INTEGER,
216                         .name = "pixel bias voltage",
217                         .minimum = 0x00,
218                         .maximum = 0x07,
219                         .step = 0x01,
220                         .default_value = 0x02,
221                         .flags = 0,
222                 },
223         },
224         .get_ctrl = &hv7131d_get_ctrl,
225         .set_ctrl = &hv7131d_set_ctrl,
226         .cropcap = {
227                 .bounds = {
228                         .left = 0,
229                         .top = 0,
230                         .width = 640,
231                         .height = 480,
232                 },
233                 .defrect = {
234                         .left = 0,
235                         .top = 0,
236                         .width = 640,
237                         .height = 480,
238                 },
239         },
240         .set_crop = &hv7131d_set_crop,
241         .pix_format = {
242                 .width = 640,
243                 .height = 480,
244                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
245                 .priv = 8,
246         },
247         .set_pix_format = &hv7131d_set_pix_format
248 };
249
250
251 int sn9c102_probe_hv7131d(struct sn9c102_device* cam)
252 {
253         int r0 = 0, r1 = 0, err = 0;
254
255         err += sn9c102_write_reg(cam, 0x01, 0x01);
256         err += sn9c102_write_reg(cam, 0x00, 0x01);
257         err += sn9c102_write_reg(cam, 0x28, 0x17);
258         if (err)
259                 return -EIO;
260
261         r0 = sn9c102_i2c_try_read(cam, &hv7131d, 0x00);
262         r1 = sn9c102_i2c_try_read(cam, &hv7131d, 0x01);
263         if (r0 < 0 || r1 < 0)
264                 return -EIO;
265
266         if (r0 != 0x00 && r1 != 0x04)
267                 return -ENODEV;
268
269         sn9c102_attach_sensor(cam, &hv7131d);
270
271         return 0;
272 }