2 * Driver for the ov9650 sensor
4 * Copyright (C) 2008 Erik Andrén
5 * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
6 * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
8 * Portions of code to USB interface and ALi driver software,
9 * Copyright (c) 2006 Willem Duinker
10 * v4l2 interface modeled after the V4L2 driver
11 * for SN9C10x PC Camera Controllers
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation, version 2.
19 #include "m5602_ov9650.h"
21 /* Vertically and horizontally flips the image if matched, needed for machines
22 where the sensor is mounted upside down */
25 struct dmi_system_id ov9650_flip_dmi_table[] = {
29 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
30 DMI_MATCH(DMI_PRODUCT_NAME, "A6VC")
36 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
37 DMI_MATCH(DMI_PRODUCT_NAME, "A6VM")
43 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
44 DMI_MATCH(DMI_PRODUCT_NAME, "A6JC")
50 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
51 DMI_MATCH(DMI_PRODUCT_NAME, "A6J")
57 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
58 DMI_MATCH(DMI_PRODUCT_NAME, "A6Kt")
64 static void ov9650_dump_registers(struct sd *sd);
66 int ov9650_read_sensor(struct sd *sd, const u8 address,
67 u8 *i2c_data, const u8 len)
71 /* The ov9650 registers have a max depth of one byte */
76 err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
77 } while ((*i2c_data & I2C_BUSY) && !err);
79 err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
84 err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
88 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len);
92 err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
94 for (i = 0; (i < len) && !err; i++) {
95 err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
97 PDEBUG(D_CONF, "Reading sensor register "
98 "0x%x containing 0x%x ", address, *i2c_data);
102 return (err < 0) ? err : 0;
105 int ov9650_write_sensor(struct sd *sd, const u8 address,
106 u8 *i2c_data, const u8 len)
110 struct usb_device *udev = sd->gspca_dev.dev;
111 __u8 *buf = sd->gspca_dev.usb_buf;
113 /* The ov9650 only supports one byte writes */
117 memcpy(buf, sensor_urb_skeleton,
118 sizeof(sensor_urb_skeleton));
120 buf[11] = sd->sensor->i2c_slave_id;
123 /* Special case larger sensor writes */
126 /* Copy a four byte sequence for each byte to write over the I2C bus */
127 for (i = 0; i < len; i++) {
128 memcpy(p, sensor_urb_skeleton + 16, 4);
131 PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x",
132 address, i2c_data[i]);
135 /* Copy the tailer */
136 memcpy(p, sensor_urb_skeleton + 20, 4);
138 /* Set the total length */
141 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
144 20 + len * 4, M5602_URB_MSG_TIMEOUT);
146 return (err < 0) ? err : 0;
149 int ov9650_probe(struct sd *sd)
151 u8 prod_id = 0, ver_id = 0, i;
154 if (force_sensor == OV9650_SENSOR) {
155 info("Forcing an %s sensor", ov9650.name);
158 /* If we want to force another sensor,
159 don't try to probe this one */
163 info("Probing for an ov9650 sensor");
165 /* Run the pre-init to actually probe the unit */
166 for (i = 0; i < ARRAY_SIZE(preinit_ov9650); i++) {
167 u8 data = preinit_ov9650[i][2];
168 if (preinit_ov9650[i][0] == SENSOR)
169 m5602_write_sensor(sd,
170 preinit_ov9650[i][1], &data, 1);
172 m5602_write_bridge(sd, preinit_ov9650[i][1], data);
175 if (ov9650_read_sensor(sd, OV9650_PID, &prod_id, 1))
178 if (ov9650_read_sensor(sd, OV9650_VER, &ver_id, 1))
181 if ((prod_id == 0x96) && (ver_id == 0x52)) {
182 info("Detected an ov9650 sensor");
189 sd->gspca_dev.cam.cam_mode = ov9650.modes;
190 sd->gspca_dev.cam.nmodes = ov9650.nmodes;
191 sd->desc->ctrls = ov9650.ctrls;
192 sd->desc->nctrls = ov9650.nctrls;
196 int ov9650_init(struct sd *sd)
202 ov9650_dump_registers(sd);
204 for (i = 0; i < ARRAY_SIZE(init_ov9650) && !err; i++) {
205 data = init_ov9650[i][2];
206 if (init_ov9650[i][0] == SENSOR)
207 err = m5602_write_sensor(sd, init_ov9650[i][1],
210 err = m5602_write_bridge(sd, init_ov9650[i][1], data);
213 if (dmi_check_system(ov9650_flip_dmi_table) && !err) {
214 info("vflip quirk active");
216 err = m5602_write_sensor(sd, OV9650_MVFP, &data, 1);
222 int ov9650_power_down(struct sd *sd)
225 for (i = 0; i < ARRAY_SIZE(power_down_ov9650) && !err; i++) {
226 u8 data = power_down_ov9650[i][2];
227 if (power_down_ov9650[i][0] == SENSOR)
228 err = m5602_write_sensor(sd,
229 power_down_ov9650[i][1], &data, 1);
231 err = m5602_write_bridge(sd, power_down_ov9650[i][1],
238 int ov9650_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
240 struct sd *sd = (struct sd *) gspca_dev;
244 err = ov9650_read_sensor(sd, OV9650_COM1, &i2c_data, 1);
247 *val = i2c_data & 0x03;
249 err = ov9650_read_sensor(sd, OV9650_AECH, &i2c_data, 1);
252 *val |= (i2c_data << 2);
254 err = ov9650_read_sensor(sd, OV9650_AECHM, &i2c_data, 1);
257 *val |= (i2c_data & 0x3f) << 10;
259 PDEBUG(D_V4L2, "Read exposure %d", *val);
264 int ov9650_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
266 struct sd *sd = (struct sd *) gspca_dev;
270 PDEBUG(D_V4L2, "Set exposure to %d",
274 i2c_data = (val >> 10) & 0x3f;
275 err = m5602_write_sensor(sd, OV9650_AECHM,
280 /* The 8 middle bits */
281 i2c_data = (val >> 2) & 0xff;
282 err = m5602_write_sensor(sd, OV9650_AECH,
288 i2c_data = val & 0x03;
289 err = m5602_write_sensor(sd, OV9650_COM1, &i2c_data, 1);
295 int ov9650_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
299 struct sd *sd = (struct sd *) gspca_dev;
301 ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
302 *val = (i2c_data & 0x03) << 8;
304 err = ov9650_read_sensor(sd, OV9650_GAIN, &i2c_data, 1);
306 PDEBUG(D_V4L2, "Read gain %d", *val);
310 int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val)
314 struct sd *sd = (struct sd *) gspca_dev;
317 /* Read the OV9650_VREF register first to avoid
318 corrupting the VREF high and low bits */
319 ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
320 /* Mask away all uninteresting bits */
321 i2c_data = ((val & 0x0300) >> 2) |
323 err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
326 i2c_data = val & 0xff;
327 err = m5602_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);
331 int ov9650_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
335 struct sd *sd = (struct sd *) gspca_dev;
337 err = ov9650_read_sensor(sd, OV9650_RED, &i2c_data, 1);
340 PDEBUG(D_V4L2, "Read red gain %d", *val);
345 int ov9650_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
349 struct sd *sd = (struct sd *) gspca_dev;
351 PDEBUG(D_V4L2, "Set red gain to %d",
354 i2c_data = val & 0xff;
355 err = m5602_write_sensor(sd, OV9650_RED, &i2c_data, 1);
360 int ov9650_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
364 struct sd *sd = (struct sd *) gspca_dev;
366 err = ov9650_read_sensor(sd, OV9650_BLUE, &i2c_data, 1);
369 PDEBUG(D_V4L2, "Read blue gain %d", *val);
374 int ov9650_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
378 struct sd *sd = (struct sd *) gspca_dev;
380 PDEBUG(D_V4L2, "Set blue gain to %d",
383 i2c_data = val & 0xff;
384 err = m5602_write_sensor(sd, OV9650_BLUE, &i2c_data, 1);
389 int ov9650_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
393 struct sd *sd = (struct sd *) gspca_dev;
395 err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
396 if (dmi_check_system(ov9650_flip_dmi_table))
397 *val = ((i2c_data & OV9650_HFLIP) >> 5) ? 0 : 1;
399 *val = (i2c_data & OV9650_HFLIP) >> 5;
400 PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
405 int ov9650_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
409 struct sd *sd = (struct sd *) gspca_dev;
411 PDEBUG(D_V4L2, "Set horizontal flip to %d", val);
412 err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
416 if (dmi_check_system(ov9650_flip_dmi_table))
417 i2c_data = ((i2c_data & 0xdf) |
418 (((val ? 0 : 1) & 0x01) << 5));
420 i2c_data = ((i2c_data & 0xdf) |
421 ((val & 0x01) << 5));
423 err = m5602_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);
428 int ov9650_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
432 struct sd *sd = (struct sd *) gspca_dev;
434 err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
435 if (dmi_check_system(ov9650_flip_dmi_table))
436 *val = ((i2c_data & 0x10) >> 4) ? 0 : 1;
438 *val = (i2c_data & 0x10) >> 4;
439 PDEBUG(D_V4L2, "Read vertical flip %d", *val);
444 int ov9650_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
448 struct sd *sd = (struct sd *) gspca_dev;
450 PDEBUG(D_V4L2, "Set vertical flip to %d", val);
451 err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
455 if (dmi_check_system(ov9650_flip_dmi_table))
456 i2c_data = ((i2c_data & 0xef) |
457 (((val ? 0 : 1) & 0x01) << 4));
459 i2c_data = ((i2c_data & 0xef) |
460 ((val & 0x01) << 4));
462 err = m5602_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);
467 int ov9650_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
471 struct sd *sd = (struct sd *) gspca_dev;
473 err = ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
476 *val = (i2c_data & 0x03) << 8;
478 err = ov9650_read_sensor(sd, OV9650_GAIN, &i2c_data, 1);
480 PDEBUG(D_V4L2, "Read gain %d", *val);
485 int ov9650_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
489 struct sd *sd = (struct sd *) gspca_dev;
491 PDEBUG(D_V4L2, "Set gain to %d", val & 0x3ff);
493 /* Read the OV9650_VREF register first to avoid
494 corrupting the VREF high and low bits */
495 err = ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
499 /* Mask away all uninteresting bits */
500 i2c_data = ((val & 0x0300) >> 2) | (i2c_data & 0x3F);
501 err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
506 i2c_data = val & 0xff;
507 err = m5602_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);
513 int ov9650_get_auto_white_balance(struct gspca_dev *gspca_dev, __s32 *val)
517 struct sd *sd = (struct sd *) gspca_dev;
519 err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
520 *val = (i2c_data & OV9650_AWB_EN) >> 1;
521 PDEBUG(D_V4L2, "Read auto white balance %d", *val);
526 int ov9650_set_auto_white_balance(struct gspca_dev *gspca_dev, __s32 val)
530 struct sd *sd = (struct sd *) gspca_dev;
532 PDEBUG(D_V4L2, "Set auto white balance to %d", val);
533 err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
537 i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1));
538 err = m5602_write_sensor(sd, OV9650_COM8, &i2c_data, 1);
543 int ov9650_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val)
547 struct sd *sd = (struct sd *) gspca_dev;
549 err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
550 *val = (i2c_data & OV9650_AGC_EN) >> 2;
551 PDEBUG(D_V4L2, "Read auto gain control %d", *val);
556 int ov9650_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
560 struct sd *sd = (struct sd *) gspca_dev;
562 PDEBUG(D_V4L2, "Set auto gain control to %d", val);
563 err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
567 i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2));
568 err = m5602_write_sensor(sd, OV9650_COM8, &i2c_data, 1);
573 static void ov9650_dump_registers(struct sd *sd)
576 info("Dumping the ov9650 register state");
577 for (address = 0; address < 0xa9; address++) {
579 ov9650_read_sensor(sd, address, &value, 1);
580 info("register 0x%x contains 0x%x",
584 info("ov9650 register state dump complete");
586 info("Probing for which registers that are read/write");
587 for (address = 0; address < 0xff; address++) {
588 u8 old_value, ctrl_value;
589 u8 test_value[2] = {0xff, 0xff};
591 ov9650_read_sensor(sd, address, &old_value, 1);
592 m5602_write_sensor(sd, address, test_value, 1);
593 ov9650_read_sensor(sd, address, &ctrl_value, 1);
595 if (ctrl_value == test_value[0])
596 info("register 0x%x is writeable", address);
598 info("register 0x%x is read only", address);
600 /* Restore original value */
601 m5602_write_sensor(sd, address, &old_value, 1);