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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / media / video / sn9c102 / sn9c102_pas106b.c
blob81cd969c1b7b19d7e1472071403d1427dfec8bb6
1 /***************************************************************************
2 * Plug-in for PAS106B 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 <linux/delay.h>
23 #include "sn9c102_sensor.h"
24 #include "sn9c102_devtable.h"
25
26
27 static int pas106b_init(struct sn9c102_device* cam)
28 {
29 int err = 0;
30
31 err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
32 {0x00, 0x14}, {0x20, 0x17},
33 {0x20, 0x19}, {0x09, 0x18});
34
35 err += sn9c102_i2c_write(cam, 0x02, 0x0c);
36 err += sn9c102_i2c_write(cam, 0x05, 0x5a);
37 err += sn9c102_i2c_write(cam, 0x06, 0x88);
38 err += sn9c102_i2c_write(cam, 0x07, 0x80);
39 err += sn9c102_i2c_write(cam, 0x10, 0x06);
40 err += sn9c102_i2c_write(cam, 0x11, 0x06);
41 err += sn9c102_i2c_write(cam, 0x12, 0x00);
42 err += sn9c102_i2c_write(cam, 0x14, 0x02);
43 err += sn9c102_i2c_write(cam, 0x13, 0x01);
44
45 msleep(400);
46
47 return err;
48 }
49
50
51 static int pas106b_get_ctrl(struct sn9c102_device* cam,
52 struct v4l2_control* ctrl)
53 {
54 switch (ctrl->id) {
55 case V4L2_CID_EXPOSURE:
56 {
57 int r1 = sn9c102_i2c_read(cam, 0x03),
58 r2 = sn9c102_i2c_read(cam, 0x04);
59 if (r1 < 0 || r2 < 0)
60 return -EIO;
61 ctrl->value = (r1 << 4) | (r2 & 0x0f);
62 }
63 return 0;
64 case V4L2_CID_RED_BALANCE:
65 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
66 return -EIO;
67 ctrl->value &= 0x1f;
68 return 0;
69 case V4L2_CID_BLUE_BALANCE:
70 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
71 return -EIO;
72 ctrl->value &= 0x1f;
73 return 0;
74 case V4L2_CID_GAIN:
75 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0e)) < 0)
76 return -EIO;
77 ctrl->value &= 0x1f;
78 return 0;
79 case V4L2_CID_CONTRAST:
80 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0f)) < 0)
81 return -EIO;
82 ctrl->value &= 0x07;
83 return 0;
84 case SN9C102_V4L2_CID_GREEN_BALANCE:
85 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0a)) < 0)
86 return -EIO;
87 ctrl->value = (ctrl->value & 0x1f) << 1;
88 return 0;
89 case SN9C102_V4L2_CID_DAC_MAGNITUDE:
90 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
91 return -EIO;
92 ctrl->value &= 0xf8;
93 return 0;
94 default:
95 return -EINVAL;
96 }
97 }
98
99
100 static int pas106b_set_ctrl(struct sn9c102_device* cam,
101 const struct v4l2_control* ctrl)
102 {
103 int err = 0;
104
105 switch (ctrl->id) {
106 case V4L2_CID_EXPOSURE:
107 err += sn9c102_i2c_write(cam, 0x03, ctrl->value >> 4);
108 err += sn9c102_i2c_write(cam, 0x04, ctrl->value & 0x0f);
109 break;
110 case V4L2_CID_RED_BALANCE:
111 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
112 break;
113 case V4L2_CID_BLUE_BALANCE:
114 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
115 break;
116 case V4L2_CID_GAIN:
117 err += sn9c102_i2c_write(cam, 0x0e, ctrl->value);
118 break;
119 case V4L2_CID_CONTRAST:
120 err += sn9c102_i2c_write(cam, 0x0f, ctrl->value);
121 break;
122 case SN9C102_V4L2_CID_GREEN_BALANCE:
123 err += sn9c102_i2c_write(cam, 0x0a, ctrl->value >> 1);
124 err += sn9c102_i2c_write(cam, 0x0b, ctrl->value >> 1);
125 break;
126 case SN9C102_V4L2_CID_DAC_MAGNITUDE:
127 err += sn9c102_i2c_write(cam, 0x08, ctrl->value << 3);
128 break;
129 default:
130 return -EINVAL;
131 }
132 err += sn9c102_i2c_write(cam, 0x13, 0x01);
133
134 return err ? -EIO : 0;
135 }
136
137
138 static int pas106b_set_crop(struct sn9c102_device* cam,
139 const struct v4l2_rect* rect)
140 {
141 struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
142 int err = 0;
143 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
144 v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
145
146 err += sn9c102_write_reg(cam, h_start, 0x12);
147 err += sn9c102_write_reg(cam, v_start, 0x13);
148
149 return err;
150 }
151
152
153 static int pas106b_set_pix_format(struct sn9c102_device* cam,
154 const struct v4l2_pix_format* pix)
155 {
156 int err = 0;
157
158 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
159 err += sn9c102_write_reg(cam, 0x2c, 0x17);
160 else
161 err += sn9c102_write_reg(cam, 0x20, 0x17);
162
163 return err;
164 }
165
166
167 static const struct sn9c102_sensor pas106b = {
168 .name = "PAS106B",
169 .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
170 .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
171 .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
172 .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
173 .interface = SN9C102_I2C_2WIRES,
174 .i2c_slave_id = 0x40,
175 .init = &pas106b_init,
176 .qctrl = {
177 {
178 .id = V4L2_CID_EXPOSURE,
179 .type = V4L2_CTRL_TYPE_INTEGER,
180 .name = "exposure",
181 .minimum = 0x125,
182 .maximum = 0xfff,
183 .step = 0x001,
184 .default_value = 0x140,
185 .flags = 0,
186 },
187 {
188 .id = V4L2_CID_GAIN,
189 .type = V4L2_CTRL_TYPE_INTEGER,
190 .name = "global gain",
191 .minimum = 0x00,
192 .maximum = 0x1f,
193 .step = 0x01,
194 .default_value = 0x0d,
195 .flags = 0,
196 },
197 {
198 .id = V4L2_CID_CONTRAST,
199 .type = V4L2_CTRL_TYPE_INTEGER,
200 .name = "contrast",
201 .minimum = 0x00,
202 .maximum = 0x07,
203 .step = 0x01,
204 .default_value = 0x00, /* 0x00~0x03 have same effect */
205 .flags = 0,
206 },
207 {
208 .id = V4L2_CID_RED_BALANCE,
209 .type = V4L2_CTRL_TYPE_INTEGER,
210 .name = "red balance",
211 .minimum = 0x00,
212 .maximum = 0x1f,
213 .step = 0x01,
214 .default_value = 0x04,
215 .flags = 0,
216 },
217 {
218 .id = V4L2_CID_BLUE_BALANCE,
219 .type = V4L2_CTRL_TYPE_INTEGER,
220 .name = "blue balance",
221 .minimum = 0x00,
222 .maximum = 0x1f,
223 .step = 0x01,
224 .default_value = 0x06,
225 .flags = 0,
226 },
227 {
228 .id = SN9C102_V4L2_CID_GREEN_BALANCE,
229 .type = V4L2_CTRL_TYPE_INTEGER,
230 .name = "green balance",
231 .minimum = 0x00,
232 .maximum = 0x3e,
233 .step = 0x02,
234 .default_value = 0x02,
235 .flags = 0,
236 },
237 {
238 .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
239 .type = V4L2_CTRL_TYPE_INTEGER,
240 .name = "DAC magnitude",
241 .minimum = 0x00,
242 .maximum = 0x1f,
243 .step = 0x01,
244 .default_value = 0x01,
245 .flags = 0,
246 },
247 },
248 .get_ctrl = &pas106b_get_ctrl,
249 .set_ctrl = &pas106b_set_ctrl,
250 .cropcap = {
251 .bounds = {
252 .left = 0,
253 .top = 0,
254 .width = 352,
255 .height = 288,
256 },
257 .defrect = {
258 .left = 0,
259 .top = 0,
260 .width = 352,
261 .height = 288,
262 },
263 },
264 .set_crop = &pas106b_set_crop,
265 .pix_format = {
266 .width = 352,
267 .height = 288,
268 .pixelformat = V4L2_PIX_FMT_SBGGR8,
269 .priv = 8, /* we use this field as 'bits per pixel' */
270 },
271 .set_pix_format = &pas106b_set_pix_format
272 };
273
274
275 int sn9c102_probe_pas106b(struct sn9c102_device* cam)
276 {
277 int r0 = 0, r1 = 0;
278 unsigned int pid = 0;
279
280 /*
281 Minimal initialization to enable the I2C communication
282 NOTE: do NOT change the values!
283 */
284 if (sn9c102_write_const_regs(cam,
285 {0x01, 0x01}, /* sensor power down */
286 {0x00, 0x01}, /* sensor power on */
287 {0x28, 0x17})) /* sensor clock at 24 MHz */
288 return -EIO;
289
290 r0 = sn9c102_i2c_try_read(cam, &pas106b, 0x00);
291 r1 = sn9c102_i2c_try_read(cam, &pas106b, 0x01);
292 if (r0 < 0 || r1 < 0)
293 return -EIO;
294
295 pid = (r0 << 11) | ((r1 & 0xf0) >> 4);
296 if (pid != 0x007)
297 return -ENODEV;
298
299 sn9c102_attach_sensor(cam, &pas106b);
300
301 return 0;
302 }
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