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Diffstat (limited to 'drivers/media/video/gspca/m5602/m5602_ov7660.c')
-rw-r--r--drivers/media/video/gspca/m5602/m5602_ov7660.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_ov7660.c b/drivers/media/video/gspca/m5602/m5602_ov7660.c
new file mode 100644
index 000000000000..7aafeb7cfa07
--- /dev/null
+++ b/drivers/media/video/gspca/m5602/m5602_ov7660.c
@@ -0,0 +1,227 @@
+/*
+ * 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.
+ *
+ */
+
+#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);
+
+const static 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
+ },
+};
+
+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) {
+ info("Forcing an %s sensor", 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;
+
+ info("Sensor reported 0x%x%x", prod_id, ver_id);
+
+ if ((prod_id == 0x76) && (ver_id == 0x60)) {
+ info("Detected a ov7660 sensor");
+ 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;
+
+ 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 void ov7660_dump_registers(struct sd *sd)
+{
+ int address;
+ info("Dumping the ov7660 register state");
+ for (address = 0; address < 0xa9; address++) {
+ u8 value;
+ m5602_read_sensor(sd, address, &value, 1);
+ info("register 0x%x contains 0x%x",
+ address, value);
+ }
+
+ info("ov7660 register state dump complete");
+
+ info("Probing for which registers that are read/write");
+ 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])
+ info("register 0x%x is writeable", address);
+ else
+ info("register 0x%x is read only", address);
+
+ /* Restore original value */
+ m5602_write_sensor(sd, address, &old_value, 1);
+ }
+}