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  • only in /netgear-R7000-V1.0.7.12_1.2.5/components/opensource/linux/linux-2.6.36/drivers/media/video/sn9c102/
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
27static 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
51static 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
100static 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
138static 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
153static 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
167static 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
275int 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}
303