diff options
Diffstat (limited to 'drivers/media/usb/gspca/m5602/m5602_ov7660.c')
| -rw-r--r-- | drivers/media/usb/gspca/m5602/m5602_ov7660.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/m5602/m5602_ov7660.c b/drivers/media/usb/gspca/m5602/m5602_ov7660.c new file mode 100644 index 000000000000..9a14835c128f --- /dev/null +++ b/drivers/media/usb/gspca/m5602/m5602_ov7660.c @@ -0,0 +1,488 @@ +/* + * Driver for the ov7660 sensor + * + * Copyright (C) 2009 Erik Andrén + * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project. + * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br> + * + * Portions of code to USB interface and ALi driver software, + * Copyright (c) 2006 Willem Duinker + * v4l2 interface modeled after the V4L2 driver + * for SN9C10x PC Camera Controllers + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include "m5602_ov7660.h" + +static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val); +static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val); +static int ov7660_get_auto_white_balance(struct gspca_dev *gspca_dev, + __s32 *val); +static int ov7660_set_auto_white_balance(struct gspca_dev *gspca_dev, + __s32 val); +static int ov7660_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val); +static int ov7660_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val); +static int ov7660_get_auto_exposure(struct gspca_dev *gspca_dev, __s32 *val); +static int ov7660_set_auto_exposure(struct gspca_dev *gspca_dev, __s32 val); +static int ov7660_get_hflip(struct gspca_dev *gspca_dev, __s32 *val); +static int ov7660_set_hflip(struct gspca_dev *gspca_dev, __s32 val); +static int ov7660_get_vflip(struct gspca_dev *gspca_dev, __s32 *val); +static int ov7660_set_vflip(struct gspca_dev *gspca_dev, __s32 val); + +static const struct ctrl ov7660_ctrls[] = { +#define GAIN_IDX 1 + { + { + .id = V4L2_CID_GAIN, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "gain", + .minimum = 0x00, + .maximum = 0xff, + .step = 0x1, + .default_value = OV7660_DEFAULT_GAIN, + .flags = V4L2_CTRL_FLAG_SLIDER + }, + .set = ov7660_set_gain, + .get = ov7660_get_gain + }, +#define BLUE_BALANCE_IDX 2 +#define RED_BALANCE_IDX 3 +#define AUTO_WHITE_BALANCE_IDX 4 + { + { + .id = V4L2_CID_AUTO_WHITE_BALANCE, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "auto white balance", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1 + }, + .set = ov7660_set_auto_white_balance, + .get = ov7660_get_auto_white_balance + }, +#define AUTO_GAIN_CTRL_IDX 5 + { + { + .id = V4L2_CID_AUTOGAIN, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "auto gain control", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1 + }, + .set = ov7660_set_auto_gain, + .get = ov7660_get_auto_gain + }, +#define AUTO_EXPOSURE_IDX 6 + { + { + .id = V4L2_CID_EXPOSURE_AUTO, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "auto exposure", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 1 + }, + .set = ov7660_set_auto_exposure, + .get = ov7660_get_auto_exposure + }, +#define HFLIP_IDX 7 + { + { + .id = V4L2_CID_HFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "horizontal flip", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0 + }, + .set = ov7660_set_hflip, + .get = ov7660_get_hflip + }, +#define VFLIP_IDX 8 + { + { + .id = V4L2_CID_VFLIP, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "vertical flip", + .minimum = 0, + .maximum = 1, + .step = 1, + .default_value = 0 + }, + .set = ov7660_set_vflip, + .get = ov7660_get_vflip + }, + +}; + +static struct v4l2_pix_format ov7660_modes[] = { + { + 640, + 480, + V4L2_PIX_FMT_SBGGR8, + V4L2_FIELD_NONE, + .sizeimage = + 640 * 480, + .bytesperline = 640, + .colorspace = V4L2_COLORSPACE_SRGB, + .priv = 0 + } +}; + +static void ov7660_dump_registers(struct sd *sd); + +int ov7660_probe(struct sd *sd) +{ + int err = 0, i; + u8 prod_id = 0, ver_id = 0; + + s32 *sensor_settings; + + if (force_sensor) { + if (force_sensor == OV7660_SENSOR) { + pr_info("Forcing an %s sensor\n", ov7660.name); + goto sensor_found; + } + /* If we want to force another sensor, + don't try to probe this one */ + return -ENODEV; + } + + /* Do the preinit */ + for (i = 0; i < ARRAY_SIZE(preinit_ov7660) && !err; i++) { + u8 data[2]; + + if (preinit_ov7660[i][0] == BRIDGE) { + err = m5602_write_bridge(sd, + preinit_ov7660[i][1], + preinit_ov7660[i][2]); + } else { + data[0] = preinit_ov7660[i][2]; + err = m5602_write_sensor(sd, + preinit_ov7660[i][1], data, 1); + } + } + if (err < 0) + return err; + + if (m5602_read_sensor(sd, OV7660_PID, &prod_id, 1)) + return -ENODEV; + + if (m5602_read_sensor(sd, OV7660_VER, &ver_id, 1)) + return -ENODEV; + + pr_info("Sensor reported 0x%x%x\n", prod_id, ver_id); + + if ((prod_id == 0x76) && (ver_id == 0x60)) { + pr_info("Detected a ov7660 sensor\n"); + goto sensor_found; + } + return -ENODEV; + +sensor_found: + sensor_settings = kmalloc( + ARRAY_SIZE(ov7660_ctrls) * sizeof(s32), GFP_KERNEL); + if (!sensor_settings) + return -ENOMEM; + + sd->gspca_dev.cam.cam_mode = ov7660_modes; + sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov7660_modes); + sd->desc->ctrls = ov7660_ctrls; + sd->desc->nctrls = ARRAY_SIZE(ov7660_ctrls); + + for (i = 0; i < ARRAY_SIZE(ov7660_ctrls); i++) + sensor_settings[i] = ov7660_ctrls[i].qctrl.default_value; + sd->sensor_priv = sensor_settings; + + return 0; +} + +int ov7660_init(struct sd *sd) +{ + int i, err = 0; + s32 *sensor_settings = sd->sensor_priv; + + /* Init the sensor */ + for (i = 0; i < ARRAY_SIZE(init_ov7660); i++) { + u8 data[2]; + + if (init_ov7660[i][0] == BRIDGE) { + err = m5602_write_bridge(sd, + init_ov7660[i][1], + init_ov7660[i][2]); + } else { + data[0] = init_ov7660[i][2]; + err = m5602_write_sensor(sd, + init_ov7660[i][1], data, 1); + } + } + + if (dump_sensor) + ov7660_dump_registers(sd); + + err = ov7660_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]); + if (err < 0) + return err; + + err = ov7660_set_auto_white_balance(&sd->gspca_dev, + sensor_settings[AUTO_WHITE_BALANCE_IDX]); + if (err < 0) + return err; + + err = ov7660_set_auto_gain(&sd->gspca_dev, + sensor_settings[AUTO_GAIN_CTRL_IDX]); + if (err < 0) + return err; + + err = ov7660_set_auto_exposure(&sd->gspca_dev, + sensor_settings[AUTO_EXPOSURE_IDX]); + if (err < 0) + return err; + err = ov7660_set_hflip(&sd->gspca_dev, + sensor_settings[HFLIP_IDX]); + if (err < 0) + return err; + + err = ov7660_set_vflip(&sd->gspca_dev, + sensor_settings[VFLIP_IDX]); + + return err; +} + +int ov7660_start(struct sd *sd) +{ + return 0; +} + +int ov7660_stop(struct sd *sd) +{ + return 0; +} + +void ov7660_disconnect(struct sd *sd) +{ + ov7660_stop(sd); + + sd->sensor = NULL; + kfree(sd->sensor_priv); +} + +static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + *val = sensor_settings[GAIN_IDX]; + PDEBUG(D_V4L2, "Read gain %d", *val); + return 0; +} + +static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val) +{ + int err; + u8 i2c_data; + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + PDEBUG(D_V4L2, "Setting gain to %d", val); + + sensor_settings[GAIN_IDX] = val; + + err = m5602_write_sensor(sd, OV7660_GAIN, &i2c_data, 1); + return err; +} + + +static int ov7660_get_auto_white_balance(struct gspca_dev *gspca_dev, + __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + *val = sensor_settings[AUTO_WHITE_BALANCE_IDX]; + return 0; +} + +static int ov7660_set_auto_white_balance(struct gspca_dev *gspca_dev, + __s32 val) +{ + int err; + u8 i2c_data; + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + PDEBUG(D_V4L2, "Set auto white balance to %d", val); + + sensor_settings[AUTO_WHITE_BALANCE_IDX] = val; + err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1); + if (err < 0) + return err; + + i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1)); + err = m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1); + + return err; +} + +static int ov7660_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + *val = sensor_settings[AUTO_GAIN_CTRL_IDX]; + PDEBUG(D_V4L2, "Read auto gain control %d", *val); + return 0; +} + +static int ov7660_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val) +{ + int err; + u8 i2c_data; + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + PDEBUG(D_V4L2, "Set auto gain control to %d", val); + + sensor_settings[AUTO_GAIN_CTRL_IDX] = val; + err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1); + if (err < 0) + return err; + + i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2)); + + return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1); +} + +static int ov7660_get_auto_exposure(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + *val = sensor_settings[AUTO_EXPOSURE_IDX]; + PDEBUG(D_V4L2, "Read auto exposure control %d", *val); + return 0; +} + +static int ov7660_set_auto_exposure(struct gspca_dev *gspca_dev, + __s32 val) +{ + int err; + u8 i2c_data; + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + PDEBUG(D_V4L2, "Set auto exposure control to %d", val); + + sensor_settings[AUTO_EXPOSURE_IDX] = val; + err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1); + if (err < 0) + return err; + + i2c_data = ((i2c_data & 0xfe) | ((val & 0x01) << 0)); + + return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1); +} + +static int ov7660_get_hflip(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + *val = sensor_settings[HFLIP_IDX]; + PDEBUG(D_V4L2, "Read horizontal flip %d", *val); + return 0; +} + +static int ov7660_set_hflip(struct gspca_dev *gspca_dev, __s32 val) +{ + int err; + u8 i2c_data; + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + PDEBUG(D_V4L2, "Set horizontal flip to %d", val); + + sensor_settings[HFLIP_IDX] = val; + + i2c_data = ((val & 0x01) << 5) | + (sensor_settings[VFLIP_IDX] << 4); + + err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1); + + return err; +} + +static int ov7660_get_vflip(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + *val = sensor_settings[VFLIP_IDX]; + PDEBUG(D_V4L2, "Read vertical flip %d", *val); + + return 0; +} + +static int ov7660_set_vflip(struct gspca_dev *gspca_dev, __s32 val) +{ + int err; + u8 i2c_data; + struct sd *sd = (struct sd *) gspca_dev; + s32 *sensor_settings = sd->sensor_priv; + + PDEBUG(D_V4L2, "Set vertical flip to %d", val); + sensor_settings[VFLIP_IDX] = val; + + i2c_data = ((val & 0x01) << 4) | (sensor_settings[VFLIP_IDX] << 5); + err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1); + if (err < 0) + return err; + + /* When vflip is toggled we need to readjust the bridge hsync/vsync */ + if (gspca_dev->streaming) + err = ov7660_start(sd); + + return err; +} + +static void ov7660_dump_registers(struct sd *sd) +{ + int address; + pr_info("Dumping the ov7660 register state\n"); + for (address = 0; address < 0xa9; address++) { + u8 value; + m5602_read_sensor(sd, address, &value, 1); + pr_info("register 0x%x contains 0x%x\n", address, value); + } + + pr_info("ov7660 register state dump complete\n"); + + pr_info("Probing for which registers that are read/write\n"); + for (address = 0; address < 0xff; address++) { + u8 old_value, ctrl_value; + u8 test_value[2] = {0xff, 0xff}; + + m5602_read_sensor(sd, address, &old_value, 1); + m5602_write_sensor(sd, address, test_value, 1); + m5602_read_sensor(sd, address, &ctrl_value, 1); + + if (ctrl_value == test_value[0]) + pr_info("register 0x%x is writeable\n", address); + else + pr_info("register 0x%x is read only\n", address); + + /* Restore original value */ + m5602_write_sensor(sd, address, &old_value, 1); + } +} |