X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fmedia%2Fusb%2Fgspca%2Fm5602%2Fm5602_ov7660.c;fp=kernel%2Fdrivers%2Fmedia%2Fusb%2Fgspca%2Fm5602%2Fm5602_ov7660.c;h=64b3b03a91416236efc84f1c98d61232ba345894;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/media/usb/gspca/m5602/m5602_ov7660.c b/kernel/drivers/media/usb/gspca/m5602/m5602_ov7660.c new file mode 100644 index 000000000..64b3b03a9 --- /dev/null +++ b/kernel/drivers/media/usb/gspca/m5602/m5602_ov7660.c @@ -0,0 +1,318 @@ +/* + * 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 + * + * 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); + } +}