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path: root/drivers/media/usb/gspca/m5602/m5602_ov7660.c
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Diffstat (limited to 'drivers/media/usb/gspca/m5602/m5602_ov7660.c')
-rw-r--r--drivers/media/usb/gspca/m5602/m5602_ov7660.c488
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);
+ }
+}