1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Support for the sensor part which is integrated (I think) into the
4 * st6422 stv06xx alike bridge, as its integrated there are no i2c writes
5 * but instead direct bridge writes.
6 *
7 * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>
8 *
9 * Strongly based on qc-usb-messenger, which is:
10 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
11 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
12 * Copyright (c) 2002, 2003 Tuukka Toivonen
13 */
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #include "stv06xx_st6422.h"
18
19 static struct v4l2_pix_format st6422_mode[] = {
20 /* Note we actually get 124 lines of data, of which we skip the 4st
21 4 as they are garbage */
22 {
23 162,
24 120,
25 V4L2_PIX_FMT_SGRBG8,
26 V4L2_FIELD_NONE,
27 .sizeimage = 162 * 120,
28 .bytesperline = 162,
29 .colorspace = V4L2_COLORSPACE_SRGB,
30 .priv = 1
31 },
32 /* Note we actually get 248 lines of data, of which we skip the 4st
33 4 as they are garbage, and we tell the app it only gets the
34 first 240 of the 244 lines it actually gets, so that it ignores
35 the last 4. */
36 {
37 324,
38 240,
39 V4L2_PIX_FMT_SGRBG8,
40 V4L2_FIELD_NONE,
41 .sizeimage = 324 * 244,
42 .bytesperline = 324,
43 .colorspace = V4L2_COLORSPACE_SRGB,
44 .priv = 0
45 },
46 };
47
48 /* V4L2 controls supported by the driver */
49 static int setbrightness(struct sd *sd, s32 val);
50 static int setcontrast(struct sd *sd, s32 val);
51 static int setgain(struct sd *sd, u8 gain);
52 static int setexposure(struct sd *sd, s16 expo);
53
st6422_s_ctrl(struct v4l2_ctrl * ctrl)54 static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)
55 {
56 struct gspca_dev *gspca_dev =
57 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
58 struct sd *sd = (struct sd *)gspca_dev;
59 int err = -EINVAL;
60
61 switch (ctrl->id) {
62 case V4L2_CID_BRIGHTNESS:
63 err = setbrightness(sd, ctrl->val);
64 break;
65 case V4L2_CID_CONTRAST:
66 err = setcontrast(sd, ctrl->val);
67 break;
68 case V4L2_CID_GAIN:
69 err = setgain(sd, ctrl->val);
70 break;
71 case V4L2_CID_EXPOSURE:
72 err = setexposure(sd, ctrl->val);
73 break;
74 }
75
76 /* commit settings */
77 if (err >= 0)
78 err = stv06xx_write_bridge(sd, 0x143f, 0x01);
79 sd->gspca_dev.usb_err = err;
80 return err;
81 }
82
83 static const struct v4l2_ctrl_ops st6422_ctrl_ops = {
84 .s_ctrl = st6422_s_ctrl,
85 };
86
st6422_init_controls(struct sd * sd)87 static int st6422_init_controls(struct sd *sd)
88 {
89 struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
90
91 v4l2_ctrl_handler_init(hdl, 4);
92 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
93 V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);
94 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
95 V4L2_CID_CONTRAST, 0, 15, 1, 11);
96 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
97 V4L2_CID_EXPOSURE, 0, 1023, 1, 256);
98 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,
99 V4L2_CID_GAIN, 0, 255, 1, 64);
100
101 return hdl->error;
102 }
103
st6422_probe(struct sd * sd)104 static int st6422_probe(struct sd *sd)
105 {
106 if (sd->bridge != BRIDGE_ST6422)
107 return -ENODEV;
108
109 pr_info("st6422 sensor detected\n");
110
111 sd->gspca_dev.cam.cam_mode = st6422_mode;
112 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);
113 return 0;
114 }
115
st6422_init(struct sd * sd)116 static int st6422_init(struct sd *sd)
117 {
118 int err = 0, i;
119
120 static const u16 st6422_bridge_init[][2] = {
121 { STV_ISO_ENABLE, 0x00 }, /* disable capture */
122 { 0x1436, 0x00 },
123 { 0x1432, 0x03 }, /* 0x00-0x1F brightness */
124 { 0x143a, 0xf9 }, /* 0x00-0x0F contrast */
125 { 0x0509, 0x38 }, /* R */
126 { 0x050a, 0x38 }, /* G */
127 { 0x050b, 0x38 }, /* B */
128 { 0x050c, 0x2a },
129 { 0x050d, 0x01 },
130
131
132 { 0x1431, 0x00 }, /* 0x00-0x07 ??? */
133 { 0x1433, 0x34 }, /* 160x120, 0x00-0x01 night filter */
134 { 0x1438, 0x18 }, /* 640x480 */
135 /* 18 bayes */
136 /* 10 compressed? */
137
138 { 0x1439, 0x00 },
139 /* anti-noise? 0xa2 gives a perfect image */
140
141 { 0x143b, 0x05 },
142 { 0x143c, 0x00 }, /* 0x00-0x01 - ??? */
143
144
145 /* shutter time 0x0000-0x03FF */
146 /* low value give good picures on moving objects (but requires much light) */
147 /* high value gives good picures in darkness (but tends to be overexposed) */
148 { 0x143e, 0x01 },
149 { 0x143d, 0x00 },
150
151 { 0x1442, 0xe2 },
152 /* write: 1x1x xxxx */
153 /* read: 1x1x xxxx */
154 /* bit 5 == button pressed and hold if 0 */
155 /* write 0xe2,0xea */
156
157 /* 0x144a */
158 /* 0x00 init */
159 /* bit 7 == button has been pressed, but not handled */
160
161 /* interrupt */
162 /* if(urb->iso_frame_desc[i].status == 0x80) { */
163 /* if(urb->iso_frame_desc[i].status == 0x88) { */
164
165 { 0x1500, 0xd0 },
166 { 0x1500, 0xd0 },
167 { 0x1500, 0x50 }, /* 0x00 - 0xFF 0x80 == compr ? */
168
169 { 0x1501, 0xaf },
170 /* high val-> light area gets darker */
171 /* low val -> light area gets lighter */
172 { 0x1502, 0xc2 },
173 /* high val-> light area gets darker */
174 /* low val -> light area gets lighter */
175 { 0x1503, 0x45 },
176 /* high val-> light area gets darker */
177 /* low val -> light area gets lighter */
178 { 0x1505, 0x02 },
179 /* 2 : 324x248 80352 bytes */
180 /* 7 : 248x162 40176 bytes */
181 /* c+f: 162*124 20088 bytes */
182
183 { 0x150e, 0x8e },
184 { 0x150f, 0x37 },
185 { 0x15c0, 0x00 },
186 { 0x15c3, 0x08 }, /* 0x04/0x14 ... test pictures ??? */
187
188
189 { 0x143f, 0x01 }, /* commit settings */
190
191 };
192
193 for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {
194 err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],
195 st6422_bridge_init[i][1]);
196 }
197
198 return err;
199 }
200
setbrightness(struct sd * sd,s32 val)201 static int setbrightness(struct sd *sd, s32 val)
202 {
203 /* val goes from 0 -> 31 */
204 return stv06xx_write_bridge(sd, 0x1432, val);
205 }
206
setcontrast(struct sd * sd,s32 val)207 static int setcontrast(struct sd *sd, s32 val)
208 {
209 /* Val goes from 0 -> 15 */
210 return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);
211 }
212
setgain(struct sd * sd,u8 gain)213 static int setgain(struct sd *sd, u8 gain)
214 {
215 int err;
216
217 /* Set red, green, blue, gain */
218 err = stv06xx_write_bridge(sd, 0x0509, gain);
219 if (err < 0)
220 return err;
221
222 err = stv06xx_write_bridge(sd, 0x050a, gain);
223 if (err < 0)
224 return err;
225
226 err = stv06xx_write_bridge(sd, 0x050b, gain);
227 if (err < 0)
228 return err;
229
230 /* 2 mystery writes */
231 err = stv06xx_write_bridge(sd, 0x050c, 0x2a);
232 if (err < 0)
233 return err;
234
235 return stv06xx_write_bridge(sd, 0x050d, 0x01);
236 }
237
setexposure(struct sd * sd,s16 expo)238 static int setexposure(struct sd *sd, s16 expo)
239 {
240 int err;
241
242 err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);
243 if (err < 0)
244 return err;
245
246 return stv06xx_write_bridge(sd, 0x143e, expo >> 8);
247 }
248
st6422_start(struct sd * sd)249 static int st6422_start(struct sd *sd)
250 {
251 int err;
252 struct cam *cam = &sd->gspca_dev.cam;
253
254 if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)
255 err = stv06xx_write_bridge(sd, 0x1505, 0x0f);
256 else
257 err = stv06xx_write_bridge(sd, 0x1505, 0x02);
258 if (err < 0)
259 return err;
260
261 /* commit settings */
262 err = stv06xx_write_bridge(sd, 0x143f, 0x01);
263 return (err < 0) ? err : 0;
264 }
265
st6422_stop(struct sd * sd)266 static int st6422_stop(struct sd *sd)
267 {
268 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
269
270 gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
271
272 return 0;
273 }
274