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