--- /dev/null
+/*
+ * V4L2 SoC Camera driver for OmniVision OV6650 Camera Sensor
+ *
+ * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
+ *
+ * Based on OmniVision OV96xx Camera Driver
+ * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * Based on ov772x camera driver:
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ * Kuninori Morimoto <morimoto.kuninori@renesas.com>
+ *
+ * Based on ov7670 and soc_camera_platform driver,
+ * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
+ * Copyright (C) 2008 Magnus Damm
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * Hardware specific bits initialy based on former work by Matt Callow
+ * drivers/media/video/omap/sensor_ov6650.c
+ * Copyright (C) 2006 Matt Callow
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+
+#include <media/soc_camera.h>
+#include <media/v4l2-chip-ident.h>
+
+
+/* Register definitions */
+#define REG_GAIN 0x00 /* range 00 - 3F */
+#define REG_BLUE 0x01
+#define REG_RED 0x02
+#define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
+#define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
+
+#define REG_BRT 0x06
+
+#define REG_PIDH 0x0a
+#define REG_PIDL 0x0b
+
+#define REG_AECH 0x10
+#define REG_CLKRC 0x11 /* Data Format and Internal Clock */
+ /* [7:6] Input system clock (MHz)*/
+ /* 00=8, 01=12, 10=16, 11=24 */
+ /* [5:0]: Internal Clock Pre-Scaler */
+#define REG_COMA 0x12 /* [7] Reset */
+#define REG_COMB 0x13
+#define REG_COMC 0x14
+#define REG_COMD 0x15
+#define REG_COML 0x16
+#define REG_HSTRT 0x17
+#define REG_HSTOP 0x18
+#define REG_VSTRT 0x19
+#define REG_VSTOP 0x1a
+#define REG_PSHFT 0x1b
+#define REG_MIDH 0x1c
+#define REG_MIDL 0x1d
+#define REG_HSYNS 0x1e
+#define REG_HSYNE 0x1f
+#define REG_COME 0x20
+#define REG_YOFF 0x21
+#define REG_UOFF 0x22
+#define REG_VOFF 0x23
+#define REG_AEW 0x24
+#define REG_AEB 0x25
+#define REG_COMF 0x26
+#define REG_COMG 0x27
+#define REG_COMH 0x28
+#define REG_COMI 0x29
+
+#define REG_FRARL 0x2b
+#define REG_COMJ 0x2c
+#define REG_COMK 0x2d
+#define REG_AVGY 0x2e
+#define REG_REF0 0x2f
+#define REG_REF1 0x30
+#define REG_REF2 0x31
+#define REG_FRAJH 0x32
+#define REG_FRAJL 0x33
+#define REG_FACT 0x34
+#define REG_L1AEC 0x35
+#define REG_AVGU 0x36
+#define REG_AVGV 0x37
+
+#define REG_SPCB 0x60
+#define REG_SPCC 0x61
+#define REG_GAM1 0x62
+#define REG_GAM2 0x63
+#define REG_GAM3 0x64
+#define REG_SPCD 0x65
+
+#define REG_SPCE 0x68
+#define REG_ADCL 0x69
+
+#define REG_RMCO 0x6c
+#define REG_GMCO 0x6d
+#define REG_BMCO 0x6e
+
+
+/* Register bits, values, etc. */
+#define OV6650_PIDH 0x66 /* high byte of product ID number */
+#define OV6650_PIDL 0x50 /* low byte of product ID number */
+#define OV6650_MIDH 0x7F /* high byte of mfg ID */
+#define OV6650_MIDL 0xA2 /* low byte of mfg ID */
+
+#define DEF_GAIN 0x00
+#define DEF_BLUE 0x80
+#define DEF_RED 0x80
+
+#define SAT_SHIFT 4
+#define SAT_MASK (0xf << SAT_SHIFT)
+#define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
+
+#define HUE_EN BIT(5)
+#define HUE_MASK 0x1f
+#define DEF_HUE 0x10
+#define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
+
+#define DEF_AECH 0x4D
+
+#define CLKRC_6MHz 0x00
+#define CLKRC_12MHz 0x40
+#define CLKRC_16MHz 0x80
+#define CLKRC_24MHz 0xc0
+#define CLKRC_DIV_MASK 0x3f
+#define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
+
+#define COMA_RESET BIT(7)
+#define COMA_QCIF BIT(5)
+#define COMA_RAW_RGB BIT(4)
+#define COMA_RGB BIT(3)
+#define COMA_BW BIT(2)
+#define COMA_WORD_SWAP BIT(1)
+#define COMA_BYTE_SWAP BIT(0)
+#define DEF_COMA 0x00
+
+#define COMB_FLIP_V BIT(7)
+#define COMB_FLIP_H BIT(5)
+#define COMB_BAND_FILTER BIT(4)
+#define COMB_AWB BIT(2)
+#define COMB_AGC BIT(1)
+#define COMB_AEC BIT(0)
+#define DEF_COMB 0x5f
+
+#define COML_ONE_CHANNEL BIT(7)
+
+#define DEF_HSTRT 0x24
+#define DEF_HSTOP 0xd4
+#define DEF_VSTRT 0x04
+#define DEF_VSTOP 0x94
+
+#define COMF_HREF_LOW BIT(4)
+
+#define COMJ_PCLK_RISING BIT(4)
+#define COMJ_VSYNC_HIGH BIT(0)
+
+/* supported resolutions */
+#define W_QCIF (DEF_HSTOP - DEF_HSTRT)
+#define W_CIF (W_QCIF << 1)
+#define H_QCIF (DEF_VSTOP - DEF_VSTRT)
+#define H_CIF (H_QCIF << 1)
+
+#define FRAME_RATE_MAX 30
+
+
+struct ov6650_reg {
+ u8 reg;
+ u8 val;
+};
+
+struct ov6650 {
+ struct v4l2_subdev subdev;
+
+ int gain;
+ int blue;
+ int red;
+ int saturation;
+ int hue;
+ int brightness;
+ int exposure;
+ int gamma;
+ int aec;
+ bool vflip;
+ bool hflip;
+ bool awb;
+ bool agc;
+ bool half_scale; /* scale down output by 2 */
+ struct v4l2_rect rect; /* sensor cropping window */
+ unsigned long pclk_limit; /* from host */
+ unsigned long pclk_max; /* from resolution and format */
+ struct v4l2_fract tpf; /* as requested with s_parm */
+ enum v4l2_mbus_pixelcode code;
+ enum v4l2_colorspace colorspace;
+};
+
+
+static enum v4l2_mbus_pixelcode ov6650_codes[] = {
+ V4L2_MBUS_FMT_YUYV8_2X8,
+ V4L2_MBUS_FMT_UYVY8_2X8,
+ V4L2_MBUS_FMT_YVYU8_2X8,
+ V4L2_MBUS_FMT_VYUY8_2X8,
+ V4L2_MBUS_FMT_SBGGR8_1X8,
+ V4L2_MBUS_FMT_GREY8_1X8,
+};
+
+static const struct v4l2_queryctrl ov6650_controls[] = {
+ {
+ .id = V4L2_CID_AUTOGAIN,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "AGC",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ },
+ {
+ .id = V4L2_CID_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain",
+ .minimum = 0,
+ .maximum = 0x3f,
+ .step = 1,
+ .default_value = DEF_GAIN,
+ },
+ {
+ .id = V4L2_CID_AUTO_WHITE_BALANCE,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "AWB",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ },
+ {
+ .id = V4L2_CID_BLUE_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Blue",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ .default_value = DEF_BLUE,
+ },
+ {
+ .id = V4L2_CID_RED_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Red",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ .default_value = DEF_RED,
+ },
+ {
+ .id = V4L2_CID_SATURATION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Saturation",
+ .minimum = 0,
+ .maximum = 0xf,
+ .step = 1,
+ .default_value = 0x8,
+ },
+ {
+ .id = V4L2_CID_HUE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Hue",
+ .minimum = 0,
+ .maximum = HUE_MASK,
+ .step = 1,
+ .default_value = DEF_HUE,
+ },
+ {
+ .id = V4L2_CID_BRIGHTNESS,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Brightness",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ .default_value = 0x80,
+ },
+ {
+ .id = V4L2_CID_EXPOSURE_AUTO,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "AEC",
+ .minimum = 0,
+ .maximum = 3,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_EXPOSURE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Exposure",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ .default_value = DEF_AECH,
+ },
+ {
+ .id = V4L2_CID_GAMMA,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gamma",
+ .minimum = 0,
+ .maximum = 0xff,
+ .step = 1,
+ .default_value = 0x12,
+ },
+ {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Vertically",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Horizontally",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+};
+
+/* read a register */
+static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
+{
+ int ret;
+ u8 data = reg;
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = &data,
+ };
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ goto err;
+
+ msg.flags = I2C_M_RD;
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ goto err;
+
+ *val = data;
+ return 0;
+
+err:
+ dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
+ return ret;
+}
+
+/* write a register */
+static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
+{
+ int ret;
+ unsigned char data[2] = { reg, val };
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 2,
+ .buf = data,
+ };
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ udelay(100);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
+ return ret;
+ }
+ return 0;
+}
+
+
+/* Read a register, alter its bits, write it back */
+static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
+{
+ u8 val;
+ int ret;
+
+ ret = ov6650_reg_read(client, reg, &val);
+ if (ret) {
+ dev_err(&client->dev,
+ "[Read]-Modify-Write of register 0x%02x failed!\n",
+ reg);
+ return ret;
+ }
+
+ val &= ~mask;
+ val |= set;
+
+ ret = ov6650_reg_write(client, reg, val);
+ if (ret)
+ dev_err(&client->dev,
+ "Read-Modify-[Write] of register 0x%02x failed!\n",
+ reg);
+
+ return ret;
+}
+
+static struct ov6650 *to_ov6650(const struct i2c_client *client)
+{
+ return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
+}
+
+/* Start/Stop streaming from the device */
+static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ return 0;
+}
+
+/* Alter bus settings on camera side */
+static int ov6650_set_bus_param(struct soc_camera_device *icd,
+ unsigned long flags)
+{
+ struct soc_camera_link *icl = to_soc_camera_link(icd);
+ struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
+ int ret;
+
+ flags = soc_camera_apply_sensor_flags(icl, flags);
+
+ if (flags & SOCAM_PCLK_SAMPLE_RISING)
+ ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
+ else
+ ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
+ if (ret)
+ return ret;
+
+ if (flags & SOCAM_HSYNC_ACTIVE_LOW)
+ ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
+ else
+ ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
+ if (ret)
+ return ret;
+
+ if (flags & SOCAM_VSYNC_ACTIVE_HIGH)
+ ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
+ else
+ ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
+
+ return ret;
+}
+
+/* Request bus settings on camera side */
+static unsigned long ov6650_query_bus_param(struct soc_camera_device *icd)
+{
+ struct soc_camera_link *icl = to_soc_camera_link(icd);
+
+ unsigned long flags = SOCAM_MASTER |
+ SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
+ SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
+ SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
+ SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATAWIDTH_8;
+
+ return soc_camera_apply_sensor_flags(icl, flags);
+}
+
+/* Get status of additional camera capabilities */
+static int ov6650_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+ uint8_t reg;
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ ctrl->value = priv->agc;
+ break;
+ case V4L2_CID_GAIN:
+ if (priv->agc) {
+ ret = ov6650_reg_read(client, REG_GAIN, ®);
+ ctrl->value = reg;
+ } else {
+ ctrl->value = priv->gain;
+ }
+ break;
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ ctrl->value = priv->awb;
+ break;
+ case V4L2_CID_BLUE_BALANCE:
+ if (priv->awb) {
+ ret = ov6650_reg_read(client, REG_BLUE, ®);
+ ctrl->value = reg;
+ } else {
+ ctrl->value = priv->blue;
+ }
+ break;
+ case V4L2_CID_RED_BALANCE:
+ if (priv->awb) {
+ ret = ov6650_reg_read(client, REG_RED, ®);
+ ctrl->value = reg;
+ } else {
+ ctrl->value = priv->red;
+ }
+ break;
+ case V4L2_CID_SATURATION:
+ ctrl->value = priv->saturation;
+ break;
+ case V4L2_CID_HUE:
+ ctrl->value = priv->hue;
+ break;
+ case V4L2_CID_BRIGHTNESS:
+ ctrl->value = priv->brightness;
+ break;
+ case V4L2_CID_EXPOSURE_AUTO:
+ ctrl->value = priv->aec;
+ break;
+ case V4L2_CID_EXPOSURE:
+ if (priv->aec) {
+ ret = ov6650_reg_read(client, REG_AECH, ®);
+ ctrl->value = reg;
+ } else {
+ ctrl->value = priv->exposure;
+ }
+ break;
+ case V4L2_CID_GAMMA:
+ ctrl->value = priv->gamma;
+ break;
+ case V4L2_CID_VFLIP:
+ ctrl->value = priv->vflip;
+ break;
+ case V4L2_CID_HFLIP:
+ ctrl->value = priv->hflip;
+ break;
+ }
+ return ret;
+}
+
+/* Set status of additional camera capabilities */
+static int ov6650_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ ret = ov6650_reg_rmw(client, REG_COMB,
+ ctrl->value ? COMB_AGC : 0, COMB_AGC);
+ if (!ret)
+ priv->agc = ctrl->value;
+ break;
+ case V4L2_CID_GAIN:
+ ret = ov6650_reg_write(client, REG_GAIN, ctrl->value);
+ if (!ret)
+ priv->gain = ctrl->value;
+ break;
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ ret = ov6650_reg_rmw(client, REG_COMB,
+ ctrl->value ? COMB_AWB : 0, COMB_AWB);
+ if (!ret)
+ priv->awb = ctrl->value;
+ break;
+ case V4L2_CID_BLUE_BALANCE:
+ ret = ov6650_reg_write(client, REG_BLUE, ctrl->value);
+ if (!ret)
+ priv->blue = ctrl->value;
+ break;
+ case V4L2_CID_RED_BALANCE:
+ ret = ov6650_reg_write(client, REG_RED, ctrl->value);
+ if (!ret)
+ priv->red = ctrl->value;
+ break;
+ case V4L2_CID_SATURATION:
+ ret = ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->value),
+ SAT_MASK);
+ if (!ret)
+ priv->saturation = ctrl->value;
+ break;
+ case V4L2_CID_HUE:
+ ret = ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->value),
+ HUE_MASK);
+ if (!ret)
+ priv->hue = ctrl->value;
+ break;
+ case V4L2_CID_BRIGHTNESS:
+ ret = ov6650_reg_write(client, REG_BRT, ctrl->value);
+ if (!ret)
+ priv->brightness = ctrl->value;
+ break;
+ case V4L2_CID_EXPOSURE_AUTO:
+ switch (ctrl->value) {
+ case V4L2_EXPOSURE_AUTO:
+ ret = ov6650_reg_rmw(client, REG_COMB, COMB_AEC, 0);
+ break;
+ default:
+ ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_AEC);
+ break;
+ }
+ if (!ret)
+ priv->aec = ctrl->value;
+ break;
+ case V4L2_CID_EXPOSURE:
+ ret = ov6650_reg_write(client, REG_AECH, ctrl->value);
+ if (!ret)
+ priv->exposure = ctrl->value;
+ break;
+ case V4L2_CID_GAMMA:
+ ret = ov6650_reg_write(client, REG_GAM1, ctrl->value);
+ if (!ret)
+ priv->gamma = ctrl->value;
+ break;
+ case V4L2_CID_VFLIP:
+ ret = ov6650_reg_rmw(client, REG_COMB,
+ ctrl->value ? COMB_FLIP_V : 0, COMB_FLIP_V);
+ if (!ret)
+ priv->vflip = ctrl->value;
+ break;
+ case V4L2_CID_HFLIP:
+ ret = ov6650_reg_rmw(client, REG_COMB,
+ ctrl->value ? COMB_FLIP_H : 0, COMB_FLIP_H);
+ if (!ret)
+ priv->hflip = ctrl->value;
+ break;
+ }
+
+ return ret;
+}
+
+/* Get chip identification */
+static int ov6650_g_chip_ident(struct v4l2_subdev *sd,
+ struct v4l2_dbg_chip_ident *id)
+{
+ id->ident = V4L2_IDENT_OV6650;
+ id->revision = 0;
+
+ return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int ov6650_get_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret;
+ u8 val;
+
+ if (reg->reg & ~0xff)
+ return -EINVAL;
+
+ reg->size = 1;
+
+ ret = ov6650_reg_read(client, reg->reg, &val);
+ if (!ret)
+ reg->val = (__u64)val;
+
+ return ret;
+}
+
+static int ov6650_set_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ if (reg->reg & ~0xff || reg->val & ~0xff)
+ return -EINVAL;
+
+ return ov6650_reg_write(client, reg->reg, reg->val);
+}
+#endif
+
+static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ a->c = priv->rect;
+
+ return 0;
+}
+
+static int ov6650_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+ struct v4l2_rect *rect = &a->c;
+ int ret;
+
+ if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ rect->left = ALIGN(rect->left, 2);
+ rect->width = ALIGN(rect->width, 2);
+ rect->top = ALIGN(rect->top, 2);
+ rect->height = ALIGN(rect->height, 2);
+ soc_camera_limit_side(&rect->left, &rect->width,
+ DEF_HSTRT << 1, 2, W_CIF);
+ soc_camera_limit_side(&rect->top, &rect->height,
+ DEF_VSTRT << 1, 2, H_CIF);
+
+ ret = ov6650_reg_write(client, REG_HSTRT, rect->left >> 1);
+ if (!ret) {
+ priv->rect.left = rect->left;
+ ret = ov6650_reg_write(client, REG_HSTOP,
+ (rect->left + rect->width) >> 1);
+ }
+ if (!ret) {
+ priv->rect.width = rect->width;
+ ret = ov6650_reg_write(client, REG_VSTRT, rect->top >> 1);
+ }
+ if (!ret) {
+ priv->rect.top = rect->top;
+ ret = ov6650_reg_write(client, REG_VSTOP,
+ (rect->top + rect->height) >> 1);
+ }
+ if (!ret)
+ priv->rect.height = rect->height;
+
+ return ret;
+}
+
+static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+ if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ a->bounds.left = DEF_HSTRT << 1;
+ a->bounds.top = DEF_VSTRT << 1;
+ a->bounds.width = W_CIF;
+ a->bounds.height = H_CIF;
+ a->defrect = a->bounds;
+ a->pixelaspect.numerator = 1;
+ a->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+static int ov6650_g_fmt(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *mf)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+
+ mf->width = priv->rect.width >> priv->half_scale;
+ mf->height = priv->rect.height >> priv->half_scale;
+ mf->code = priv->code;
+ mf->colorspace = priv->colorspace;
+ mf->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
+{
+ return (width > rect->width >> 1 || height > rect->height >> 1);
+}
+
+static u8 to_clkrc(struct v4l2_fract *timeperframe,
+ unsigned long pclk_limit, unsigned long pclk_max)
+{
+ unsigned long pclk;
+
+ if (timeperframe->numerator && timeperframe->denominator)
+ pclk = pclk_max * timeperframe->denominator /
+ (FRAME_RATE_MAX * timeperframe->numerator);
+ else
+ pclk = pclk_max;
+
+ if (pclk_limit && pclk_limit < pclk)
+ pclk = pclk_limit;
+
+ return (pclk_max - 1) / pclk;
+}
+
+/* set the format we will capture in */
+static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct soc_camera_device *icd = client->dev.platform_data;
+ struct soc_camera_sense *sense = icd->sense;
+ struct ov6650 *priv = to_ov6650(client);
+ bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
+ struct v4l2_crop a = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .c = {
+ .left = priv->rect.left + (priv->rect.width >> 1) -
+ (mf->width >> (1 - half_scale)),
+ .top = priv->rect.top + (priv->rect.height >> 1) -
+ (mf->height >> (1 - half_scale)),
+ .width = mf->width << half_scale,
+ .height = mf->height << half_scale,
+ },
+ };
+ enum v4l2_mbus_pixelcode code = mf->code;
+ unsigned long mclk, pclk;
+ u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
+ int ret;
+
+ /* select color matrix configuration for given color encoding */
+ switch (code) {
+ case V4L2_MBUS_FMT_GREY8_1X8:
+ dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
+ coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
+ coma_set |= COMA_BW;
+ break;
+ case V4L2_MBUS_FMT_YUYV8_2X8:
+ dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
+ coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
+ coma_set |= COMA_WORD_SWAP;
+ break;
+ case V4L2_MBUS_FMT_YVYU8_2X8:
+ dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
+ coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
+ COMA_BYTE_SWAP;
+ break;
+ case V4L2_MBUS_FMT_UYVY8_2X8:
+ dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
+ if (half_scale) {
+ coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
+ coma_set |= COMA_BYTE_SWAP;
+ } else {
+ coma_mask |= COMA_RGB | COMA_BW;
+ coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
+ }
+ break;
+ case V4L2_MBUS_FMT_VYUY8_2X8:
+ dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
+ if (half_scale) {
+ coma_mask |= COMA_RGB | COMA_BW;
+ coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
+ } else {
+ coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
+ coma_set |= COMA_BYTE_SWAP;
+ }
+ break;
+ case V4L2_MBUS_FMT_SBGGR8_1X8:
+ dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
+ coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
+ coma_set |= COMA_RAW_RGB | COMA_RGB;
+ break;
+ case 0:
+ break;
+ default:
+ dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
+ return -EINVAL;
+ }
+ priv->code = code;
+
+ if (code == V4L2_MBUS_FMT_GREY8_1X8 ||
+ code == V4L2_MBUS_FMT_SBGGR8_1X8) {
+ coml_mask = COML_ONE_CHANNEL;
+ coml_set = 0;
+ priv->pclk_max = 4000000;
+ } else {
+ coml_mask = 0;
+ coml_set = COML_ONE_CHANNEL;
+ priv->pclk_max = 8000000;
+ }
+
+ if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
+ priv->colorspace = V4L2_COLORSPACE_SRGB;
+ else if (code != 0)
+ priv->colorspace = V4L2_COLORSPACE_JPEG;
+
+ if (half_scale) {
+ dev_dbg(&client->dev, "max resolution: QCIF\n");
+ coma_set |= COMA_QCIF;
+ priv->pclk_max /= 2;
+ } else {
+ dev_dbg(&client->dev, "max resolution: CIF\n");
+ coma_mask |= COMA_QCIF;
+ }
+ priv->half_scale = half_scale;
+
+ if (sense) {
+ if (sense->master_clock == 8000000) {
+ dev_dbg(&client->dev, "8MHz input clock\n");
+ clkrc = CLKRC_6MHz;
+ } else if (sense->master_clock == 12000000) {
+ dev_dbg(&client->dev, "12MHz input clock\n");
+ clkrc = CLKRC_12MHz;
+ } else if (sense->master_clock == 16000000) {
+ dev_dbg(&client->dev, "16MHz input clock\n");
+ clkrc = CLKRC_16MHz;
+ } else if (sense->master_clock == 24000000) {
+ dev_dbg(&client->dev, "24MHz input clock\n");
+ clkrc = CLKRC_24MHz;
+ } else {
+ dev_err(&client->dev,
+ "unspported input clock, check platform data\n");
+ return -EINVAL;
+ }
+ mclk = sense->master_clock;
+ priv->pclk_limit = sense->pixel_clock_max;
+ } else {
+ clkrc = CLKRC_24MHz;
+ mclk = 24000000;
+ priv->pclk_limit = 0;
+ dev_dbg(&client->dev, "using default 24MHz input clock\n");
+ }
+
+ clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
+
+ pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
+ dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
+ mclk / pclk, 10 * mclk % pclk / pclk);
+
+ ret = ov6650_s_crop(sd, &a);
+ if (!ret)
+ ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
+ if (!ret)
+ ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
+ if (!ret)
+ ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
+
+ if (!ret) {
+ mf->colorspace = priv->colorspace;
+ mf->width = priv->rect.width >> half_scale;
+ mf->height = priv->rect.height >> half_scale;
+ }
+
+ return ret;
+}
+
+static int ov6650_try_fmt(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *mf)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+
+ if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
+ v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
+ &mf->height, 2, H_CIF, 1, 0);
+
+ mf->field = V4L2_FIELD_NONE;
+
+ switch (mf->code) {
+ case V4L2_MBUS_FMT_Y10_1X10:
+ mf->code = V4L2_MBUS_FMT_GREY8_1X8;
+ case V4L2_MBUS_FMT_GREY8_1X8:
+ case V4L2_MBUS_FMT_YVYU8_2X8:
+ case V4L2_MBUS_FMT_YUYV8_2X8:
+ case V4L2_MBUS_FMT_VYUY8_2X8:
+ case V4L2_MBUS_FMT_UYVY8_2X8:
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ break;
+ default:
+ mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
+ case V4L2_MBUS_FMT_SBGGR8_1X8:
+ mf->colorspace = V4L2_COLORSPACE_SRGB;
+ break;
+ }
+
+ return 0;
+}
+
+static int ov6650_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
+ enum v4l2_mbus_pixelcode *code)
+{
+ if (index >= ARRAY_SIZE(ov6650_codes))
+ return -EINVAL;
+
+ *code = ov6650_codes[index];
+ return 0;
+}
+
+static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+ struct v4l2_captureparm *cp = &parms->parm.capture;
+
+ if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ memset(cp, 0, sizeof(*cp));
+ cp->capability = V4L2_CAP_TIMEPERFRAME;
+ cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
+ priv->pclk_limit, priv->pclk_max));
+ cp->timeperframe.denominator = FRAME_RATE_MAX;
+
+ dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
+ cp->timeperframe.numerator, cp->timeperframe.denominator);
+
+ return 0;
+}
+
+static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov6650 *priv = to_ov6650(client);
+ struct v4l2_captureparm *cp = &parms->parm.capture;
+ struct v4l2_fract *tpf = &cp->timeperframe;
+ int div, ret;
+ u8 clkrc;
+
+ if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (cp->extendedmode != 0)
+ return -EINVAL;
+
+ if (tpf->numerator == 0 || tpf->denominator == 0)
+ div = 1; /* Reset to full rate */
+ else
+ div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
+
+ if (div == 0)
+ div = 1;
+ else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
+ div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
+
+ /*
+ * Keep result to be used as tpf limit
+ * for subseqent clock divider calculations
+ */
+ priv->tpf.numerator = div;
+ priv->tpf.denominator = FRAME_RATE_MAX;
+
+ clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
+
+ ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
+ if (!ret) {
+ tpf->numerator = GET_CLKRC_DIV(clkrc);
+ tpf->denominator = FRAME_RATE_MAX;
+ }
+
+ return ret;
+}
+
+/* Soft reset the camera. This has nothing to do with the RESET pin! */
+static int ov6650_reset(struct i2c_client *client)
+{
+ int ret;
+
+ dev_dbg(&client->dev, "reset\n");
+
+ ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
+ if (ret)
+ dev_err(&client->dev,
+ "An error occured while entering soft reset!\n");
+
+ return ret;
+}
+
+/* program default register values */
+static int ov6650_prog_dflt(struct i2c_client *client)
+{
+ int ret;
+
+ dev_dbg(&client->dev, "initializing\n");
+
+ ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
+ if (!ret)
+ ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
+
+ return ret;
+}
+
+static int ov6650_video_probe(struct soc_camera_device *icd,
+ struct i2c_client *client)
+{
+ u8 pidh, pidl, midh, midl;
+ int ret = 0;
+
+ /*
+ * check and show product ID and manufacturer ID
+ */
+ ret = ov6650_reg_read(client, REG_PIDH, &pidh);
+ if (!ret)
+ ret = ov6650_reg_read(client, REG_PIDL, &pidl);
+ if (!ret)
+ ret = ov6650_reg_read(client, REG_MIDH, &midh);
+ if (!ret)
+ ret = ov6650_reg_read(client, REG_MIDL, &midl);
+
+ if (ret)
+ return ret;
+
+ if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
+ dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
+ pidh, pidl);
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev,
+ "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
+ pidh, pidl, midh, midl);
+
+ ret = ov6650_reset(client);
+ if (!ret)
+ ret = ov6650_prog_dflt(client);
+
+ return ret;
+}
+
+static struct soc_camera_ops ov6650_ops = {
+ .set_bus_param = ov6650_set_bus_param,
+ .query_bus_param = ov6650_query_bus_param,
+ .controls = ov6650_controls,
+ .num_controls = ARRAY_SIZE(ov6650_controls),
+};
+
+static struct v4l2_subdev_core_ops ov6650_core_ops = {
+ .g_ctrl = ov6650_g_ctrl,
+ .s_ctrl = ov6650_s_ctrl,
+ .g_chip_ident = ov6650_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = ov6650_get_register,
+ .s_register = ov6650_set_register,
+#endif
+};
+
+static struct v4l2_subdev_video_ops ov6650_video_ops = {
+ .s_stream = ov6650_s_stream,
+ .g_mbus_fmt = ov6650_g_fmt,
+ .s_mbus_fmt = ov6650_s_fmt,
+ .try_mbus_fmt = ov6650_try_fmt,
+ .enum_mbus_fmt = ov6650_enum_fmt,
+ .cropcap = ov6650_cropcap,
+ .g_crop = ov6650_g_crop,
+ .s_crop = ov6650_s_crop,
+ .g_parm = ov6650_g_parm,
+ .s_parm = ov6650_s_parm,
+};
+
+static struct v4l2_subdev_ops ov6650_subdev_ops = {
+ .core = &ov6650_core_ops,
+ .video = &ov6650_video_ops,
+};
+
+/*
+ * i2c_driver function
+ */
+static int ov6650_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct ov6650 *priv;
+ struct soc_camera_device *icd = client->dev.platform_data;
+ struct soc_camera_link *icl;
+ int ret;
+
+ if (!icd) {
+ dev_err(&client->dev, "Missing soc-camera data!\n");
+ return -EINVAL;
+ }
+
+ icl = to_soc_camera_link(icd);
+ if (!icl) {
+ dev_err(&client->dev, "Missing platform_data for driver\n");
+ return -EINVAL;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&client->dev,
+ "Failed to allocate memory for private data!\n");
+ return -ENOMEM;
+ }
+
+ v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
+
+ icd->ops = &ov6650_ops;
+
+ priv->rect.left = DEF_HSTRT << 1;
+ priv->rect.top = DEF_VSTRT << 1;
+ priv->rect.width = W_CIF;
+ priv->rect.height = H_CIF;
+ priv->half_scale = false;
+ priv->code = V4L2_MBUS_FMT_YUYV8_2X8;
+ priv->colorspace = V4L2_COLORSPACE_JPEG;
+
+ ret = ov6650_video_probe(icd, client);
+
+ if (ret) {
+ icd->ops = NULL;
+ i2c_set_clientdata(client, NULL);
+ kfree(priv);
+ }
+
+ return ret;
+}
+
+static int ov6650_remove(struct i2c_client *client)
+{
+ struct ov6650 *priv = to_ov6650(client);
+
+ i2c_set_clientdata(client, NULL);
+ kfree(priv);
+ return 0;
+}
+
+static const struct i2c_device_id ov6650_id[] = {
+ { "ov6650", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ov6650_id);
+
+static struct i2c_driver ov6650_i2c_driver = {
+ .driver = {
+ .name = "ov6650",
+ },
+ .probe = ov6650_probe,
+ .remove = ov6650_remove,
+ .id_table = ov6650_id,
+};
+
+static int __init ov6650_module_init(void)
+{
+ return i2c_add_driver(&ov6650_i2c_driver);
+}
+
+static void __exit ov6650_module_exit(void)
+{
+ i2c_del_driver(&ov6650_i2c_driver);
+}
+
+module_init(ov6650_module_init);
+module_exit(ov6650_module_exit);
+
+MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
+MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
+MODULE_LICENSE("GPL v2");
git.samba.org / sfrench / cifs-2.6.git / commitdiff