1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
4  *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
5  * Copyright (c) 2002, 2003 Tuukka Toivonen
6  * Copyright (c) 2008 Erik Andrén
7  *
8  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
9  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
10  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
11  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
12  * P/N 861075-0040: Sensor HDCS1000        ASIC
13  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
14  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
15  */
16 
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 
19 #include "stv06xx_vv6410.h"
20 
21 static struct v4l2_pix_format vv6410_mode[] = {
22 	{
23 		356,
24 		292,
25 		V4L2_PIX_FMT_SGRBG8,
26 		V4L2_FIELD_NONE,
27 		.sizeimage = 356 * 292,
28 		.bytesperline = 356,
29 		.colorspace = V4L2_COLORSPACE_SRGB,
30 		.priv = 0
31 	}
32 };
33 
vv6410_s_ctrl(struct v4l2_ctrl * ctrl)34 static int vv6410_s_ctrl(struct v4l2_ctrl *ctrl)
35 {
36 	struct gspca_dev *gspca_dev =
37 		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
38 	int err = -EINVAL;
39 
40 	switch (ctrl->id) {
41 	case V4L2_CID_HFLIP:
42 		if (!gspca_dev->streaming)
43 			return 0;
44 		err = vv6410_set_hflip(gspca_dev, ctrl->val);
45 		break;
46 	case V4L2_CID_VFLIP:
47 		if (!gspca_dev->streaming)
48 			return 0;
49 		err = vv6410_set_vflip(gspca_dev, ctrl->val);
50 		break;
51 	case V4L2_CID_GAIN:
52 		err = vv6410_set_analog_gain(gspca_dev, ctrl->val);
53 		break;
54 	case V4L2_CID_EXPOSURE:
55 		err = vv6410_set_exposure(gspca_dev, ctrl->val);
56 		break;
57 	}
58 	return err;
59 }
60 
61 static const struct v4l2_ctrl_ops vv6410_ctrl_ops = {
62 	.s_ctrl = vv6410_s_ctrl,
63 };
64 
vv6410_probe(struct sd * sd)65 static int vv6410_probe(struct sd *sd)
66 {
67 	u16 data;
68 	int err;
69 
70 	err = stv06xx_read_sensor(sd, VV6410_DEVICEH, &data);
71 	if (err < 0)
72 		return -ENODEV;
73 
74 	if (data != 0x19)
75 		return -ENODEV;
76 
77 	pr_info("vv6410 sensor detected\n");
78 
79 	sd->gspca_dev.cam.cam_mode = vv6410_mode;
80 	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(vv6410_mode);
81 	return 0;
82 }
83 
vv6410_init_controls(struct sd * sd)84 static int vv6410_init_controls(struct sd *sd)
85 {
86 	struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
87 
88 	v4l2_ctrl_handler_init(hdl, 2);
89 	/* Disable the hardware VFLIP and HFLIP as we currently lack a
90 	   mechanism to adjust the image offset in such a way that
91 	   we don't need to renegotiate the announced format */
92 	/* v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops, */
93 	/*		V4L2_CID_HFLIP, 0, 1, 1, 0); */
94 	/* v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops, */
95 	/*		V4L2_CID_VFLIP, 0, 1, 1, 0); */
96 	v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops,
97 			V4L2_CID_EXPOSURE, 0, 32768, 1, 20000);
98 	v4l2_ctrl_new_std(hdl, &vv6410_ctrl_ops,
99 			V4L2_CID_GAIN, 0, 15, 1, 10);
100 	return hdl->error;
101 }
102 
vv6410_init(struct sd * sd)103 static int vv6410_init(struct sd *sd)
104 {
105 	int err = 0, i;
106 
107 	for (i = 0; i < ARRAY_SIZE(stv_bridge_init); i++)
108 		stv06xx_write_bridge(sd, stv_bridge_init[i].addr, stv_bridge_init[i].data);
109 
110 	err = stv06xx_write_sensor_bytes(sd, (u8 *) vv6410_sensor_init,
111 					 ARRAY_SIZE(vv6410_sensor_init));
112 	return (err < 0) ? err : 0;
113 }
114 
vv6410_start(struct sd * sd)115 static int vv6410_start(struct sd *sd)
116 {
117 	int err;
118 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
119 	struct cam *cam = &sd->gspca_dev.cam;
120 	u32 priv = cam->cam_mode[sd->gspca_dev.curr_mode].priv;
121 
122 	if (priv & VV6410_SUBSAMPLE) {
123 		gspca_dbg(gspca_dev, D_CONF, "Enabling subsampling\n");
124 		stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02);
125 		stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);
126 
127 		stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
128 	} else {
129 		stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
130 		stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
131 		stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x00);
132 
133 	}
134 
135 	/* Turn on LED */
136 	err = stv06xx_write_bridge(sd, STV_LED_CTRL, LED_ON);
137 	if (err < 0)
138 		return err;
139 
140 	err = stv06xx_write_sensor(sd, VV6410_SETUP0, 0);
141 	if (err < 0)
142 		return err;
143 
144 	gspca_dbg(gspca_dev, D_STREAM, "Starting stream\n");
145 
146 	return 0;
147 }
148 
vv6410_stop(struct sd * sd)149 static int vv6410_stop(struct sd *sd)
150 {
151 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
152 	int err;
153 
154 	/* Turn off LED */
155 	err = stv06xx_write_bridge(sd, STV_LED_CTRL, LED_OFF);
156 	if (err < 0)
157 		return err;
158 
159 	err = stv06xx_write_sensor(sd, VV6410_SETUP0, VV6410_LOW_POWER_MODE);
160 	if (err < 0)
161 		return err;
162 
163 	gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");
164 
165 	return 0;
166 }
167 
vv6410_dump(struct sd * sd)168 static int vv6410_dump(struct sd *sd)
169 {
170 	u8 i;
171 	int err = 0;
172 
173 	pr_info("Dumping all vv6410 sensor registers\n");
174 	for (i = 0; i < 0xff && !err; i++) {
175 		u16 data;
176 		err = stv06xx_read_sensor(sd, i, &data);
177 		pr_info("Register 0x%x contained 0x%x\n", i, data);
178 	}
179 	return (err < 0) ? err : 0;
180 }
181 
vv6410_set_hflip(struct gspca_dev * gspca_dev,__s32 val)182 static int vv6410_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
183 {
184 	int err;
185 	u16 i2c_data;
186 	struct sd *sd = (struct sd *) gspca_dev;
187 
188 	err = stv06xx_read_sensor(sd, VV6410_DATAFORMAT, &i2c_data);
189 	if (err < 0)
190 		return err;
191 
192 	if (val)
193 		i2c_data |= VV6410_HFLIP;
194 	else
195 		i2c_data &= ~VV6410_HFLIP;
196 
197 	gspca_dbg(gspca_dev, D_CONF, "Set horizontal flip to %d\n", val);
198 	err = stv06xx_write_sensor(sd, VV6410_DATAFORMAT, i2c_data);
199 
200 	return (err < 0) ? err : 0;
201 }
202 
vv6410_set_vflip(struct gspca_dev * gspca_dev,__s32 val)203 static int vv6410_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
204 {
205 	int err;
206 	u16 i2c_data;
207 	struct sd *sd = (struct sd *) gspca_dev;
208 
209 	err = stv06xx_read_sensor(sd, VV6410_DATAFORMAT, &i2c_data);
210 	if (err < 0)
211 		return err;
212 
213 	if (val)
214 		i2c_data |= VV6410_VFLIP;
215 	else
216 		i2c_data &= ~VV6410_VFLIP;
217 
218 	gspca_dbg(gspca_dev, D_CONF, "Set vertical flip to %d\n", val);
219 	err = stv06xx_write_sensor(sd, VV6410_DATAFORMAT, i2c_data);
220 
221 	return (err < 0) ? err : 0;
222 }
223 
vv6410_set_analog_gain(struct gspca_dev * gspca_dev,__s32 val)224 static int vv6410_set_analog_gain(struct gspca_dev *gspca_dev, __s32 val)
225 {
226 	int err;
227 	struct sd *sd = (struct sd *) gspca_dev;
228 
229 	gspca_dbg(gspca_dev, D_CONF, "Set analog gain to %d\n", val);
230 	err = stv06xx_write_sensor(sd, VV6410_ANALOGGAIN, 0xf0 | (val & 0xf));
231 
232 	return (err < 0) ? err : 0;
233 }
234 
vv6410_set_exposure(struct gspca_dev * gspca_dev,__s32 val)235 static int vv6410_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
236 {
237 	int err;
238 	struct sd *sd = (struct sd *) gspca_dev;
239 	unsigned int fine, coarse;
240 
241 	val = (val * val >> 14) + val / 4;
242 
243 	fine = val % VV6410_CIF_LINELENGTH;
244 	coarse = min(512, val / VV6410_CIF_LINELENGTH);
245 
246 	gspca_dbg(gspca_dev, D_CONF, "Set coarse exposure to %d, fine exposure to %d\n",
247 		  coarse, fine);
248 
249 	err = stv06xx_write_sensor(sd, VV6410_FINEH, fine >> 8);
250 	if (err < 0)
251 		goto out;
252 
253 	err = stv06xx_write_sensor(sd, VV6410_FINEL, fine & 0xff);
254 	if (err < 0)
255 		goto out;
256 
257 	err = stv06xx_write_sensor(sd, VV6410_COARSEH, coarse >> 8);
258 	if (err < 0)
259 		goto out;
260 
261 	err = stv06xx_write_sensor(sd, VV6410_COARSEL, coarse & 0xff);
262 
263 out:
264 	return err;
265 }
266