1/***************************************************************************
2 * Plug-in for PAS202BCB image sensor connected to the SN9C1xx PC Camera   *
3 * Controllers                                                             *
4 *                                                                         *
5 * Copyright (C) 2004 by Carlos Eduardo Medaglia Dyonisio                  *
6 *                       <medaglia@undl.org.br>                            *
7 *                       http://cadu.homelinux.com:8080/                   *
8 *                                                                         *
9 * Support for SN9C103, DAC Magnitude, exposure and green gain controls    *
10 * added by Luca Risolia <luca.risolia@studio.unibo.it>                    *
11 *                                                                         *
12 * This program is free software; you can redistribute it and/or modify    *
13 * it under the terms of the GNU General Public License as published by    *
14 * the Free Software Foundation; either version 2 of the License, or       *
15 * (at your option) any later version.                                     *
16 *                                                                         *
17 * This program is distributed in the hope that it will be useful,         *
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
20 * GNU General Public License for more details.                            *
21 *                                                                         *
22 * You should have received a copy of the GNU General Public License       *
23 * along with this program; if not, write to the Free Software             *
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
25 ***************************************************************************/
26
27#include <linux/delay.h>
28#include "sn9c102_sensor.h"
29
30
31static int pas202bcb_init(struct sn9c102_device* cam)
32{
33	int err = 0;
34
35	switch (sn9c102_get_bridge(cam)) {
36	case BRIDGE_SN9C101:
37	case BRIDGE_SN9C102:
38		err = sn9c102_write_const_regs(cam, {0x00, 0x10}, {0x00, 0x11},
39					       {0x00, 0x14}, {0x20, 0x17},
40					       {0x30, 0x19}, {0x09, 0x18});
41		break;
42	case BRIDGE_SN9C103:
43		err = sn9c102_write_const_regs(cam, {0x00, 0x02}, {0x00, 0x03},
44					       {0x1a, 0x04}, {0x20, 0x05},
45					       {0x20, 0x06}, {0x20, 0x07},
46					       {0x00, 0x10}, {0x00, 0x11},
47					       {0x00, 0x14}, {0x20, 0x17},
48					       {0x30, 0x19}, {0x09, 0x18},
49					       {0x02, 0x1c}, {0x03, 0x1d},
50					       {0x0f, 0x1e}, {0x0c, 0x1f},
51					       {0x00, 0x20}, {0x10, 0x21},
52					       {0x20, 0x22}, {0x30, 0x23},
53					       {0x40, 0x24}, {0x50, 0x25},
54					       {0x60, 0x26}, {0x70, 0x27},
55					       {0x80, 0x28}, {0x90, 0x29},
56					       {0xa0, 0x2a}, {0xb0, 0x2b},
57					       {0xc0, 0x2c}, {0xd0, 0x2d},
58					       {0xe0, 0x2e}, {0xf0, 0x2f},
59					       {0xff, 0x30});
60		break;
61	default:
62		break;
63	}
64
65	err += sn9c102_i2c_write(cam, 0x02, 0x14);
66	err += sn9c102_i2c_write(cam, 0x03, 0x40);
67	err += sn9c102_i2c_write(cam, 0x0d, 0x2c);
68	err += sn9c102_i2c_write(cam, 0x0e, 0x01);
69	err += sn9c102_i2c_write(cam, 0x0f, 0xa9);
70	err += sn9c102_i2c_write(cam, 0x10, 0x08);
71	err += sn9c102_i2c_write(cam, 0x13, 0x63);
72	err += sn9c102_i2c_write(cam, 0x15, 0x70);
73	err += sn9c102_i2c_write(cam, 0x11, 0x01);
74
75	msleep(400);
76
77	return err;
78}
79
80
81static int pas202bcb_get_ctrl(struct sn9c102_device* cam,
82			      struct v4l2_control* ctrl)
83{
84	switch (ctrl->id) {
85	case V4L2_CID_EXPOSURE:
86		{
87			int r1 = sn9c102_i2c_read(cam, 0x04),
88			    r2 = sn9c102_i2c_read(cam, 0x05);
89			if (r1 < 0 || r2 < 0)
90				return -EIO;
91			ctrl->value = (r1 << 6) | (r2 & 0x3f);
92		}
93		return 0;
94	case V4L2_CID_RED_BALANCE:
95		if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
96			return -EIO;
97		ctrl->value &= 0x0f;
98		return 0;
99	case V4L2_CID_BLUE_BALANCE:
100		if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
101			return -EIO;
102		ctrl->value &= 0x0f;
103		return 0;
104	case V4L2_CID_GAIN:
105		if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
106			return -EIO;
107		ctrl->value &= 0x1f;
108		return 0;
109	case SN9C102_V4L2_CID_GREEN_BALANCE:
110		if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
111			return -EIO;
112		ctrl->value &= 0x0f;
113		return 0;
114	case SN9C102_V4L2_CID_DAC_MAGNITUDE:
115		if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
116			return -EIO;
117		return 0;
118	default:
119		return -EINVAL;
120	}
121}
122
123
124static int pas202bcb_set_pix_format(struct sn9c102_device* cam,
125				    const struct v4l2_pix_format* pix)
126{
127	int err = 0;
128
129	if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
130		err += sn9c102_write_reg(cam, 0x28, 0x17);
131	else
132		err += sn9c102_write_reg(cam, 0x20, 0x17);
133
134	return err;
135}
136
137
138static int pas202bcb_set_ctrl(struct sn9c102_device* cam,
139			      const struct v4l2_control* ctrl)
140{
141	int err = 0;
142
143	switch (ctrl->id) {
144	case V4L2_CID_EXPOSURE:
145		err += sn9c102_i2c_write(cam, 0x04, ctrl->value >> 6);
146		err += sn9c102_i2c_write(cam, 0x05, ctrl->value & 0x3f);
147		break;
148	case V4L2_CID_RED_BALANCE:
149		err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
150		break;
151	case V4L2_CID_BLUE_BALANCE:
152		err += sn9c102_i2c_write(cam, 0x07, ctrl->value);
153		break;
154	case V4L2_CID_GAIN:
155		err += sn9c102_i2c_write(cam, 0x10, ctrl->value);
156		break;
157	case SN9C102_V4L2_CID_GREEN_BALANCE:
158		err += sn9c102_i2c_write(cam, 0x08, ctrl->value);
159		break;
160	case SN9C102_V4L2_CID_DAC_MAGNITUDE:
161		err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
162		break;
163	default:
164		return -EINVAL;
165	}
166	err += sn9c102_i2c_write(cam, 0x11, 0x01);
167
168	return err ? -EIO : 0;
169}
170
171
172static int pas202bcb_set_crop(struct sn9c102_device* cam,
173			      const struct v4l2_rect* rect)
174{
175	struct sn9c102_sensor* s = sn9c102_get_sensor(cam);
176	int err = 0;
177	u8 h_start = 0,
178	   v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
179
180	switch (sn9c102_get_bridge(cam)) {
181	case BRIDGE_SN9C101:
182	case BRIDGE_SN9C102:
183		h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4;
184		break;
185	case BRIDGE_SN9C103:
186		h_start = (u8)(rect->left - s->cropcap.bounds.left) + 3;
187		break;
188	default:
189		break;
190	}
191
192	err += sn9c102_write_reg(cam, h_start, 0x12);
193	err += sn9c102_write_reg(cam, v_start, 0x13);
194
195	return err;
196}
197
198
199static const struct sn9c102_sensor pas202bcb = {
200	.name = "PAS202BCB",
201	.maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
202	.supported_bridge = BRIDGE_SN9C101 | BRIDGE_SN9C102 | BRIDGE_SN9C103,
203	.sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
204	.frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
205	.interface = SN9C102_I2C_2WIRES,
206	.i2c_slave_id = 0x40,
207	.init = &pas202bcb_init,
208	.qctrl = {
209		{
210			.id = V4L2_CID_EXPOSURE,
211			.type = V4L2_CTRL_TYPE_INTEGER,
212			.name = "exposure",
213			.minimum = 0x01e5,
214			.maximum = 0x3fff,
215			.step = 0x0001,
216			.default_value = 0x01e5,
217			.flags = 0,
218		},
219		{
220			.id = V4L2_CID_GAIN,
221			.type = V4L2_CTRL_TYPE_INTEGER,
222			.name = "global gain",
223			.minimum = 0x00,
224			.maximum = 0x1f,
225			.step = 0x01,
226			.default_value = 0x0b,
227			.flags = 0,
228		},
229		{
230			.id = V4L2_CID_RED_BALANCE,
231			.type = V4L2_CTRL_TYPE_INTEGER,
232			.name = "red balance",
233			.minimum = 0x00,
234			.maximum = 0x0f,
235			.step = 0x01,
236			.default_value = 0x00,
237			.flags = 0,
238		},
239		{
240			.id = V4L2_CID_BLUE_BALANCE,
241			.type = V4L2_CTRL_TYPE_INTEGER,
242			.name = "blue balance",
243			.minimum = 0x00,
244			.maximum = 0x0f,
245			.step = 0x01,
246			.default_value = 0x05,
247			.flags = 0,
248		},
249		{
250			.id = SN9C102_V4L2_CID_GREEN_BALANCE,
251			.type = V4L2_CTRL_TYPE_INTEGER,
252			.name = "green balance",
253			.minimum = 0x00,
254			.maximum = 0x0f,
255			.step = 0x01,
256			.default_value = 0x00,
257			.flags = 0,
258		},
259		{
260			.id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
261			.type = V4L2_CTRL_TYPE_INTEGER,
262			.name = "DAC magnitude",
263			.minimum = 0x00,
264			.maximum = 0xff,
265			.step = 0x01,
266			.default_value = 0x04,
267			.flags = 0,
268		},
269	},
270	.get_ctrl = &pas202bcb_get_ctrl,
271	.set_ctrl = &pas202bcb_set_ctrl,
272	.cropcap = {
273		.bounds = {
274			.left = 0,
275			.top = 0,
276			.width = 640,
277			.height = 480,
278		},
279		.defrect = {
280			.left = 0,
281			.top = 0,
282			.width = 640,
283			.height = 480,
284		},
285	},
286	.set_crop = &pas202bcb_set_crop,
287	.pix_format = {
288		.width = 640,
289		.height = 480,
290		.pixelformat = V4L2_PIX_FMT_SBGGR8,
291		.priv = 8,
292	},
293	.set_pix_format = &pas202bcb_set_pix_format
294};
295
296
297int sn9c102_probe_pas202bcb(struct sn9c102_device* cam)
298{
299	int r0 = 0, r1 = 0, err = 0;
300	unsigned int pid = 0;
301
302	/*
303	 *  Minimal initialization to enable the I2C communication
304	 *  NOTE: do NOT change the values!
305	 */
306	switch (sn9c102_get_bridge(cam)) {
307	case BRIDGE_SN9C101:
308	case BRIDGE_SN9C102:
309		err = sn9c102_write_const_regs(cam,
310					       {0x01, 0x01}, /* power down */
311					       {0x40, 0x01}, /* power on */
312					       {0x28, 0x17});/* clock 24 MHz */
313		break;
314	case BRIDGE_SN9C103: /* do _not_ change anything! */
315		err = sn9c102_write_const_regs(cam, {0x09, 0x01}, {0x44, 0x01},
316					       {0x44, 0x02}, {0x29, 0x17});
317		break;
318	default:
319		break;
320	}
321
322	r0 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x00);
323	r1 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x01);
324
325	if (err || r0 < 0 || r1 < 0)
326		return -EIO;
327
328	pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
329	if (pid != 0x017)
330		return -ENODEV;
331
332	sn9c102_attach_sensor(cam, &pas202bcb);
333
334	return 0;
335}
336