--- /dev/null
+/*
+ * 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_s_ctrl(struct v4l2_ctrl *ctrl);
+static void ov7660_dump_registers(struct sd *sd);
+
+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 const struct v4l2_ctrl_ops ov7660_ctrl_ops = {
+ .s_ctrl = ov7660_s_ctrl,
+};
+
+int ov7660_probe(struct sd *sd)
+{
+ int err = 0, i;
+ u8 prod_id = 0, ver_id = 0;
+
+ 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:
+ sd->gspca_dev.cam.cam_mode = ov7660_modes;
+ sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov7660_modes);
+
+ return 0;
+}
+
+int ov7660_init(struct sd *sd)
+{
+ int i, err;
+
+ /* 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 (err < 0)
+ return err;
+ }
+
+ if (dump_sensor)
+ ov7660_dump_registers(sd);
+
+ return 0;
+}
+
+int ov7660_init_controls(struct sd *sd)
+{
+ struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
+
+ sd->gspca_dev.vdev.ctrl_handler = hdl;
+ v4l2_ctrl_handler_init(hdl, 6);
+
+ v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE,
+ 0, 1, 1, 1);
+ v4l2_ctrl_new_std_menu(hdl, &ov7660_ctrl_ops,
+ V4L2_CID_EXPOSURE_AUTO, 1, 0, V4L2_EXPOSURE_AUTO);
+
+ sd->autogain = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops,
+ V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+ sd->gain = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_GAIN, 0,
+ 255, 1, OV7660_DEFAULT_GAIN);
+
+ sd->hflip = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_HFLIP,
+ 0, 1, 1, 0);
+ sd->vflip = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_VFLIP,
+ 0, 1, 1, 0);
+
+ if (hdl->error) {
+ pr_err("Could not initialize controls\n");
+ return hdl->error;
+ }
+
+ v4l2_ctrl_auto_cluster(2, &sd->autogain, 0, false);
+ v4l2_ctrl_cluster(2, &sd->hflip);
+
+ return 0;
+}
+
+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;
+}
+
+static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val)
+{
+ int err;
+ u8 i2c_data = val;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_CONF, "Setting gain to %d", val);
+
+ err = m5602_write_sensor(sd, OV7660_GAIN, &i2c_data, 1);
+ return err;
+}
+
+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;
+
+ PDEBUG(D_CONF, "Set auto white balance to %d", 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_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
+{
+ int err;
+ u8 i2c_data;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_CONF, "Set auto gain control to %d", 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_set_auto_exposure(struct gspca_dev *gspca_dev,
+ __s32 val)
+{
+ int err;
+ u8 i2c_data;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_CONF, "Set auto exposure control to %d", val);
+
+ err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
+ if (err < 0)
+ return err;
+
+ val = (val == V4L2_EXPOSURE_AUTO);
+ i2c_data = ((i2c_data & 0xfe) | ((val & 0x01) << 0));
+
+ return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
+}
+
+static int ov7660_set_hvflip(struct gspca_dev *gspca_dev)
+{
+ int err;
+ u8 i2c_data;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ PDEBUG(D_CONF, "Set hvflip to %d, %d", sd->hflip->val, sd->vflip->val);
+
+ i2c_data = (sd->hflip->val << 5) | (sd->vflip->val << 4);
+
+ err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1);
+
+ return err;
+}
+
+static int ov7660_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct gspca_dev *gspca_dev =
+ container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
+ struct sd *sd = (struct sd *) gspca_dev;
+ int err;
+
+ if (!gspca_dev->streaming)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ err = ov7660_set_auto_white_balance(gspca_dev, ctrl->val);
+ break;
+ case V4L2_CID_EXPOSURE_AUTO:
+ err = ov7660_set_auto_exposure(gspca_dev, ctrl->val);
+ break;
+ case V4L2_CID_AUTOGAIN:
+ err = ov7660_set_auto_gain(gspca_dev, ctrl->val);
+ if (err || ctrl->val)
+ return err;
+ err = ov7660_set_gain(gspca_dev, sd->gain->val);
+ break;
+ case V4L2_CID_HFLIP:
+ err = ov7660_set_hvflip(gspca_dev);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ 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);
+ }
+}
Code Review / kvmfornfv.git / blobdiff