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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_hv7131d.c
blob2dce5c908c8e257191cc41b4669c18b00ea27055
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 #include "sn9c102_devtable.h"
24
25
26 static int hv7131d_init(struct sn9c102_device* cam)
27 {
28 int err;
29
30 err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
31 {0x00, 0x14}, {0x60, 0x17},
32 {0x0e, 0x18}, {0xf2, 0x19});
33
34 err += sn9c102_i2c_write(cam, 0x01, 0x04);
35 err += sn9c102_i2c_write(cam, 0x02, 0x00);
36 err += sn9c102_i2c_write(cam, 0x28, 0x00);
37
38 return err;
39 }
40
41
42 static int hv7131d_get_ctrl(struct sn9c102_device* cam,
43 struct v4l2_control* ctrl)
44 {
45 switch (ctrl->id) {
46 case V4L2_CID_EXPOSURE:
47 {
48 int r1 = sn9c102_i2c_read(cam, 0x26),
49 r2 = sn9c102_i2c_read(cam, 0x27);
50 if (r1 < 0 || r2 < 0)
51 return -EIO;
52 ctrl->value = (r1 << 8) | (r2 & 0xff);
53 }
54 return 0;
55 case V4L2_CID_RED_BALANCE:
56 if ((ctrl->value = sn9c102_i2c_read(cam, 0x31)) < 0)
57 return -EIO;
58 ctrl->value = 0x3f - (ctrl->value & 0x3f);
59 return 0;
60 case V4L2_CID_BLUE_BALANCE:
61 if ((ctrl->value = sn9c102_i2c_read(cam, 0x33)) < 0)
62 return -EIO;
63 ctrl->value = 0x3f - (ctrl->value & 0x3f);
64 return 0;
65 case SN9C102_V4L2_CID_GREEN_BALANCE:
66 if ((ctrl->value = sn9c102_i2c_read(cam, 0x32)) < 0)
67 return -EIO;
68 ctrl->value = 0x3f - (ctrl->value & 0x3f);
69 return 0;
70 case SN9C102_V4L2_CID_RESET_LEVEL:
71 if ((ctrl->value = sn9c102_i2c_read(cam, 0x30)) < 0)
72 return -EIO;
73 ctrl->value &= 0x3f;
74 return 0;
75 case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
76 if ((ctrl->value = sn9c102_i2c_read(cam, 0x34)) < 0)
77 return -EIO;
78 ctrl->value &= 0x07;
79 return 0;
80 default:
81 return -EINVAL;
82 }
83 }
84
85
86 static int hv7131d_set_ctrl(struct sn9c102_device* cam,
87 const struct v4l2_control* ctrl)
88 {
89 int err = 0;
90
91 switch (ctrl->id) {
92 case V4L2_CID_EXPOSURE:
93 err += sn9c102_i2c_write(cam, 0x26, ctrl->value >> 8);
94 err += sn9c102_i2c_write(cam, 0x27, ctrl->value & 0xff);
95 break;
96 case V4L2_CID_RED_BALANCE:
97 err += sn9c102_i2c_write(cam, 0x31, 0x3f - ctrl->value);
98 break;
99 case V4L2_CID_BLUE_BALANCE:
100 err += sn9c102_i2c_write(cam, 0x33, 0x3f - ctrl->value);
101 break;
102 case SN9C102_V4L2_CID_GREEN_BALANCE:
103 err += sn9c102_i2c_write(cam, 0x32, 0x3f - ctrl->value);
104 break;
105 case SN9C102_V4L2_CID_RESET_LEVEL:
106 err += sn9c102_i2c_write(cam, 0x30, ctrl->value);
107 break;
108 case SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE:
109 err += sn9c102_i2c_write(cam, 0x34, ctrl->value);
110 break;
111 default:
112 return -EINVAL;
113 }
114
115 return err ? -EIO : 0;
116 }
117
118
119 static int hv7131d_set_crop(struct sn9c102_device* cam,
120 const struct v4l2_rect* rect)
121 {
122 struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
123 int err = 0;
124 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 2,
125 v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;
126
127 err += sn9c102_write_reg(cam, h_start, 0x12);
128 err += sn9c102_write_reg(cam, v_start, 0x13);
129
130 return err;
131 }
132
133
134 static int hv7131d_set_pix_format(struct sn9c102_device* cam,
135 const struct v4l2_pix_format* pix)
136 {
137 int err = 0;
138
139 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
140 err += sn9c102_write_reg(cam, 0x42, 0x19);
141 else
142 err += sn9c102_write_reg(cam, 0xf2, 0x19);
143
144 return err;
145 }
146
147
148 static const struct sn9c102_sensor hv7131d = {
149 .name = "HV7131D",
150 .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
151 .supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102,
152 .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
153 .frequency = SN9C102_I2C_100KHZ,
154 .interface = SN9C102_I2C_2WIRES,
155 .i2c_slave_id = 0x11,
156 .init = &hv7131d_init,
157 .qctrl = {
158 {
159 .id = V4L2_CID_EXPOSURE,
160 .type = V4L2_CTRL_TYPE_INTEGER,
161 .name = "exposure",
162 .minimum = 0x0250,
163 .maximum = 0xffff,
164 .step = 0x0001,
165 .default_value = 0x0250,
166 .flags = 0,
167 },
168 {
169 .id = V4L2_CID_RED_BALANCE,
170 .type = V4L2_CTRL_TYPE_INTEGER,
171 .name = "red balance",
172 .minimum = 0x00,
173 .maximum = 0x3f,
174 .step = 0x01,
175 .default_value = 0x00,
176 .flags = 0,
177 },
178 {
179 .id = V4L2_CID_BLUE_BALANCE,
180 .type = V4L2_CTRL_TYPE_INTEGER,
181 .name = "blue balance",
182 .minimum = 0x00,
183 .maximum = 0x3f,
184 .step = 0x01,
185 .default_value = 0x20,
186 .flags = 0,
187 },
188 {
189 .id = SN9C102_V4L2_CID_GREEN_BALANCE,
190 .type = V4L2_CTRL_TYPE_INTEGER,
191 .name = "green balance",
192 .minimum = 0x00,
193 .maximum = 0x3f,
194 .step = 0x01,
195 .default_value = 0x1e,
196 .flags = 0,
197 },
198 {
199 .id = SN9C102_V4L2_CID_RESET_LEVEL,
200 .type = V4L2_CTRL_TYPE_INTEGER,
201 .name = "reset level",
202 .minimum = 0x19,
203 .maximum = 0x3f,
204 .step = 0x01,
205 .default_value = 0x30,
206 .flags = 0,
207 },
208 {
209 .id = SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE,
210 .type = V4L2_CTRL_TYPE_INTEGER,
211 .name = "pixel bias voltage",
212 .minimum = 0x00,
213 .maximum = 0x07,
214 .step = 0x01,
215 .default_value = 0x02,
216 .flags = 0,
217 },
218 },
219 .get_ctrl = &hv7131d_get_ctrl,
220 .set_ctrl = &hv7131d_set_ctrl,
221 .cropcap = {
222 .bounds = {
223 .left = 0,
224 .top = 0,
225 .width = 640,
226 .height = 480,
227 },
228 .defrect = {
229 .left = 0,
230 .top = 0,
231 .width = 640,
232 .height = 480,
233 },
234 },
235 .set_crop = &hv7131d_set_crop,
236 .pix_format = {
237 .width = 640,
238 .height = 480,
239 .pixelformat = V4L2_PIX_FMT_SBGGR8,
240 .priv = 8,
241 },
242 .set_pix_format = &hv7131d_set_pix_format
243 };
244
245
246 int sn9c102_probe_hv7131d(struct sn9c102_device* cam)
247 {
248 int r0 = 0, r1 = 0, err;
249
250 err = sn9c102_write_const_regs(cam, {0x01, 0x01}, {0x00, 0x01},
251 {0x28, 0x17});
252
253 r0 = sn9c102_i2c_try_read(cam, &hv7131d, 0x00);
254 r1 = sn9c102_i2c_try_read(cam, &hv7131d, 0x01);
255 if (err || r0 < 0 || r1 < 0)
256 return -EIO;
257
258 if ((r0 != 0x00 && r0 != 0x01) || r1 != 0x04)
259 return -ENODEV;
260
261 sn9c102_attach_sensor(cam, &hv7131d);
262
263 return 0;
264 }
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