1 /*
2 * Support for the sensor part which is integrated (I think) into the
3 * st6422 stv06xx alike bridge, as its integrated there are no i2c writes
4 * but instead direct bridge writes.
5 *
6 * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
7 *
8 * Strongly based on qc-usb-messenger, which is:
9 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
10 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
11 * Copyright (c) 2002, 2003 Tuukka Toivonen
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 */
28
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31 #include "stv06xx_st6422.h"
32
33 static struct v4l2_pix_format st6422_mode[] = {
34 /* Note we actually get 124 lines of data, of which we skip the 4st
35 4 as they are garbage */
36 {
37 162,
38 120,
39 V4L2_PIX_FMT_SGRBG8,
40 V4L2_FIELD_NONE,
41 .sizeimage = 162 * 120,
42 .bytesperline = 162,
43 .colorspace = V4L2_COLORSPACE_SRGB,
44 .priv = 1
45 },
46 /* Note we actually get 248 lines of data, of which we skip the 4st
47 4 as they are garbage, and we tell the app it only gets the
48 first 240 of the 244 lines it actually gets, so that it ignores
49 the last 4. */
50 {
51 324,
52 240,
53 V4L2_PIX_FMT_SGRBG8,
54 V4L2_FIELD_NONE,
55 .sizeimage = 324 * 244,
56 .bytesperline = 324,
57 .colorspace = V4L2_COLORSPACE_SRGB,
58 .priv = 0
59 },
60 };
61
62 /* V4L2 controls supported by the driver */
63 static int setbrightness(struct sd *sd, s32 val);
64 static int setcontrast(struct sd *sd, s32 val);
65 static int setgain(struct sd *sd, u8 gain);
66 static int setexposure(struct sd *sd, s16 expo);
67
st6422_s_ctrl(struct v4l2_ctrl * ctrl)68 static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)
69 {
70 struct gspca_dev *gspca_dev =
71 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
72 struct sd *sd = (struct sd *)gspca_dev;
73 int err = -EINVAL;
74
75 switch (ctrl->id) {
76 case V4L2_CID_BRIGHTNESS:
77 err = setbrightness(sd, ctrl->val);
78 break;
79 case V4L2_CID_CONTRAST:
80 err = setcontrast(sd, ctrl->val);
81 break;
82 case V4L2_CID_GAIN:
83 err = setgain(sd, ctrl->val);
84 break;
85 case V4L2_CID_EXPOSURE:
86 err = setexposure(sd, ctrl->val);
87 break;
88 }
89
90 /* commit settings */
91 if (err >= 0)
92 err = stv06xx_write_bridge(sd, 0x143f, 0x01);
93 sd->gspca_dev.usb_err = err;
94 return err;
95 }
96
97 static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
98 .s_ctrl = st6422_s_ctrl,
99 };
100
st6422_init_controls(struct sd * sd)101 static int st6422_init_controls(struct sd *sd)
102 {
103 struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
104
105 v4l2_ctrl_handler_init(hdl, 4);
106 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
107 V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
108 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
109 V4L2_CID_CONTRAST, 0, 15, 1, 11);
110 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
111 V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
112 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
113 V4L2_CID_GAIN, 0, 255, 1, 64);
114
115 return hdl->error;
116 }
117
st6422_probe(struct sd * sd)118 static int st6422_probe(struct sd *sd)
119 {
120 if (sd->bridge != BRIDGE_ST6422)
121 return -ENODEV;
122
123 pr_info("st6422 sensor detected\n");
124
125 sd->gspca_dev.cam.cam_mode = st6422_mode;
126 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
127 return 0;
128 }
129
st6422_init(struct sd * sd)130 static int st6422_init(struct sd *sd)
131 {
132 int err = 0, i;
133
134 const u16 st6422_bridge_init[][2] = {
135 { STV_ISO_ENABLE, 0x00 }, /* disable capture */
136 { 0x1436, 0x00 },
137 { 0x1432, 0x03 }, /* 0x00-0x1F brightness */
138 { 0x143a, 0xf9 }, /* 0x00-0x0F contrast */
139 { 0x0509, 0x38 }, /* R */
140 { 0x050a, 0x38 }, /* G */
141 { 0x050b, 0x38 }, /* B */
142 { 0x050c, 0x2a },
143 { 0x050d, 0x01 },
144
145
146 { 0x1431, 0x00 }, /* 0x00-0x07 ??? */
147 { 0x1433, 0x34 }, /* 160x120, 0x00-0x01 night filter */
148 { 0x1438, 0x18 }, /* 640x480 */
149 /* 18 bayes */
150 /* 10 compressed? */
151
152 { 0x1439, 0x00 },
153 /* anti-noise? 0xa2 gives a perfect image */
154
155 { 0x143b, 0x05 },
156 { 0x143c, 0x00 }, /* 0x00-0x01 - ??? */
157
158
159 /* shutter time 0x0000-0x03FF */
160 /* low value give good picures on moving objects (but requires much light) */
161 /* high value gives good picures in darkness (but tends to be overexposed) */
162 { 0x143e, 0x01 },
163 { 0x143d, 0x00 },
164
165 { 0x1442, 0xe2 },
166 /* write: 1x1x xxxx */
167 /* read: 1x1x xxxx */
168 /* bit 5 == button pressed and hold if 0 */
169 /* write 0xe2,0xea */
170
171 /* 0x144a */
172 /* 0x00 init */
173 /* bit 7 == button has been pressed, but not handled */
174
175 /* interrupt */
176 /* if(urb->iso_frame_desc[i].status == 0x80) { */
177 /* if(urb->iso_frame_desc[i].status == 0x88) { */
178
179 { 0x1500, 0xd0 },
180 { 0x1500, 0xd0 },
181 { 0x1500, 0x50 }, /* 0x00 - 0xFF 0x80 == compr ? */
182
183 { 0x1501, 0xaf },
184 /* high val-> light area gets darker */
185 /* low val -> light area gets lighter */
186 { 0x1502, 0xc2 },
187 /* high val-> light area gets darker */
188 /* low val -> light area gets lighter */
189 { 0x1503, 0x45 },
190 /* high val-> light area gets darker */
191 /* low val -> light area gets lighter */
192 { 0x1505, 0x02 },
193 /* 2 : 324x248 80352 bytes */
194 /* 7 : 248x162 40176 bytes */
195 /* c+f: 162*124 20088 bytes */
196
197 { 0x150e, 0x8e },
198 { 0x150f, 0x37 },
199 { 0x15c0, 0x00 },
200 { 0x15c3, 0x08 }, /* 0x04/0x14 ... test pictures ??? */
201
202
203 { 0x143f, 0x01 }, /* commit settings */
204
205 };
206
207 for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
208 err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
209 st6422_bridge_init[i][1]);
210 }
211
212 return err;
213 }
214
setbrightness(struct sd * sd,s32 val)215 static int setbrightness(struct sd *sd, s32 val)
216 {
217 /* val goes from 0 -> 31 */
218 return stv06xx_write_bridge(sd, 0x1432, val);
219 }
220
setcontrast(struct sd * sd,s32 val)221 static int setcontrast(struct sd *sd, s32 val)
222 {
223 /* Val goes from 0 -> 15 */
224 return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
225 }
226
setgain(struct sd * sd,u8 gain)227 static int setgain(struct sd *sd, u8 gain)
228 {
229 int err;
230
231 /* Set red, green, blue, gain */
232 err = stv06xx_write_bridge(sd, 0x0509, gain);
233 if (err < 0)
234 return err;
235
236 err = stv06xx_write_bridge(sd, 0x050a, gain);
237 if (err < 0)
238 return err;
239
240 err = stv06xx_write_bridge(sd, 0x050b, gain);
241 if (err < 0)
242 return err;
243
244 /* 2 mystery writes */
245 err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
246 if (err < 0)
247 return err;
248
249 return stv06xx_write_bridge(sd, 0x050d, 0x01);
250 }
251
setexposure(struct sd * sd,s16 expo)252 static int setexposure(struct sd *sd, s16 expo)
253 {
254 int err;
255
256 err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
257 if (err < 0)
258 return err;
259
260 return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
261 }
262
st6422_start(struct sd * sd)263 static int st6422_start(struct sd *sd)
264 {
265 int err;
266 struct cam *cam = &sd->gspca_dev.cam;
267
268 if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
269 err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
270 else
271 err = stv06xx_write_bridge(sd, 0x1505, 0x02);
272 if (err < 0)
273 return err;
274
275 /* commit settings */
276 err = stv06xx_write_bridge(sd, 0x143f, 0x01);
277 return (err < 0) ? err : 0;
278 }
279
st6422_stop(struct sd * sd)280 static int st6422_stop(struct sd *sd)
281 {
282 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
283
284 PDEBUG(D_STREAM, "Halting stream");
285
286 return 0;
287 }
288