This dirver implements preview mode of the S5K4ECGX sensor.
capture (snapshot) operation, face detection are missing now.
Following controls are supported:
contrast/saturation/birghtness/sharpness
Signed-off-by: Sangwook Lee <sangwook.lee@xxxxxxxxxx>
---
drivers/media/video/Kconfig | 7 +
drivers/media/video/Makefile | 1 +
drivers/media/video/s5k4ecgx.c | 881 ++++++++++++++++++++++++++++++++++++++++
include/media/s5k4ecgx.h | 29 ++
4 files changed, 918 insertions(+)
create mode 100644 drivers/media/video/s5k4ecgx.c
create mode 100644 include/media/s5k4ecgx.h
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 99937c9..45d7f99 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -559,6 +559,13 @@ config VIDEO_S5K6AA
This is a V4L2 sensor-level driver for Samsung S5K6AA(FX) 1.3M
camera sensor with an embedded SoC image signal processor.
+config VIDEO_S5K4ECGX
+ tristate "Samsung S5K4ECGX sensor support"
+ depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ ---help---
+ This is a V4L2 sensor-level driver for Samsung S5K4ECGX 5M
+ camera sensor with an embedded SoC image signal processor.
+
source "drivers/media/video/smiapp/Kconfig"
comment "Flash devices"
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index d209de0..605bf35 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -79,6 +79,7 @@ obj-$(CONFIG_VIDEO_SR030PC30) += sr030pc30.o
obj-$(CONFIG_VIDEO_NOON010PC30) += noon010pc30.o
obj-$(CONFIG_VIDEO_M5MOLS) += m5mols/
obj-$(CONFIG_VIDEO_S5K6AA) += s5k6aa.o
+obj-$(CONFIG_VIDEO_S5K4ECGX) += s5k4ecgx.o
obj-$(CONFIG_VIDEO_SMIAPP) += smiapp/
obj-$(CONFIG_VIDEO_ADP1653) += adp1653.o
obj-$(CONFIG_VIDEO_AS3645A) += as3645a.o
diff --git a/drivers/media/video/s5k4ecgx.c b/drivers/media/video/s5k4ecgx.c
new file mode 100644
index 0000000..e277d71
--- /dev/null
+++ b/drivers/media/video/s5k4ecgx.c
@@ -0,0 +1,881 @@
+/*
+ * Driver for s5k4ecgx (5MP Camera) from SAMSUNG
+ * a quarter-inch optical format 1.4 micron 5 megapixel (Mp)
+ * CMOS image sensor, as reffering to s5k6aa.c
+ *
+ * Copyright (C) 2012, Linaro, Sangwook Lee <sangwook.lee@xxxxxxxxxx>
+ * Copyright (C) 2012, Insignal Co,. Ltd, Homin Lee <suapapa@xxxxxxxxxxxxxx>
+ * Copyright (C) 2011, SAMSUNG ELECTRONICS
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-mediabus.h>
+#include <media/s5k4ecgx.h>
+
+#include "s5k4ecgx_regs.h"
+
+static int debug;
+module_param(debug, int, 0644);
+
+#define S5K4ECGX_DRIVER_NAME "s5k4ecgx"
+
+/* Basic windows sizes */
+#define S5K4ECGX_OUT_WIDTH_DEF 640
+#define S5K4ECGX_OUT_HEIGHT_DEF 480
+#define S5K4ECGX_WIN_WIDTH_MAX 1024
+#define S5K4ECGX_WIN_HEIGHT_MAX 600
+#define S5K4ECGX_WIN_WIDTH_MIN 176
+#define S5K4ECGX_WIN_HEIGHT_MIN 144
+
+/* Firmware revision information */
+#define S5K4ECGX_REVISION_1_1 0x11
+#define S5K4ECGX_FW_VERSION 0x4EC0
+#define REG_FW_VERSION 0x700001A4
+#define REG_FW_REVISION 0x700001A6
+
+/* For now we use only one user configuration register set */
+#define S5K4ECGX_MAX_PRESETS 1
+
+/* Review this depending on system */
+#define S5K4ECGX_POLL_TIME 1 /* ms */
+
+/* General purpose parameters */
+#define REG_USER_BRIGHTNESS 0x7000022C /* Brigthness */
+#define REG_USER_CONTRAST 0x7000022E /* Contrast */
+#define REG_USER_SATURATION 0x70000230 /* Saturation */
+
+/* FIXME: No information availble about these register from the datasheet */
+#define REG_USER_SHARP1 0x70000A28
+#define REG_USER_SHARP2 0x70000ADE
+#define REG_USER_SHARP3 0x70000B94
+#define REG_USER_SHARP4 0x70000C4A
+#define REG_USER_SHARP5 0x70000D00
+
+#define LSB(X) (((X) & 0xFF))
+#define MSB(Y) (((Y) >> 8) & 0xFF)
+
+/*
+ * Preview size lists supported by sensor
+ */
+struct regval_list *pview_size[] = {
+ s5k4ecgx_176_preview,
+ s5k4ecgx_352_preview,
+ s5k4ecgx_640_preview,
+ s5k4ecgx_720_preview,
+};
+
+struct s5k4ecgx_framesize {
+ u32 idx; /* Should indicate index of pview_size */
+ u32 width;
+ u32 height;
+};
+
+/*
+ * TODO: currently only preview is supported and snapshopt(capture)
+ * is not implemented yet
+ */
+static struct s5k4ecgx_framesize p_sets[] = {
+ {0, 176, 144},
+ {1, 352, 288},
+ {2, 640, 480},
+ {3, 720, 480},
+};
+
+#define S5K4ECGX_NUM_PREV ARRAY_SIZE(p_sets)
+struct s5k4ecgx_pixfmt {
+ enum v4l2_mbus_pixelcode code;
+ u32 colorspace;
+};
+
+/* By defaut value, output from sensor will be YUV422 0-255 */
+static const struct s5k4ecgx_pixfmt s5k4ecgx_formats[] = {
+ { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
+};
+
+struct s5k4ecgx_preset {
+ /* output pixel format and resolution */
+ struct v4l2_mbus_framefmt mbus_fmt;
+ u8 clk_id;
+ u8 index;
+};
+
+struct s5k4ecgx {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+ struct v4l2_ctrl_handler handler;
+
+ struct s5k4ecgx_platform_data *pdata;
+ struct s5k4ecgx_preset presets[S5K4ECGX_MAX_PRESETS];
+ struct s5k4ecgx_preset *preset;
+ struct s5k4ecgx_framesize *p_now; /* Current frame size */
+ struct v4l2_fract timeperframe;
+
+ /* protects the struct members below */
+ struct mutex lock;
+ int streaming;
+
+ /* Token for I2C burst write */
+ enum token_type reg_type;
+ u16 reg_addr_high;
+ u16 reg_addr_low;
+
+ /* Platform specific field */
+ int (*set_power)(int);
+ int mdelay;
+};
+
+static inline struct s5k4ecgx *to_s5k4ecgx(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct s5k4ecgx, sd);
+}
+
+static int s5k4ecgx_write_i2c(struct i2c_client *client, u8 *data, u16 len)
+{
+ struct i2c_msg msg = {client->addr, 0, len, (u8 *)data};
+ int ret;
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ mdelay(S5K4ECGX_POLL_TIME);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to write I2C err\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int s5k4ecgx_write32(struct i2c_client *client,
+ u16 addr, u16 data)
+{
+ u8 buf[4];
+
+ buf[0] = MSB(addr); /* SWAP 16 bit */
+ buf[1] = LSB(addr);
+ buf[2] = MSB(data);
+ buf[3] = LSB(data);
+
+ return s5k4ecgx_write_i2c(client, buf, 4);
+}
+
+static int s5k4ecgx_read_setup(struct v4l2_subdev *sd, u32 addr)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ u16 high = addr >> 16, low = addr & 0xFFFF;
+ int ret = 0;
+
+ if (priv->reg_type != TOK_READ) {
+ priv->reg_addr_high = 0;
+ priv->reg_type = TOK_READ;
+ }
+ if (priv->reg_addr_high != high) {
+ ret = s5k4ecgx_write32(client, 0x002C, high);
+ priv->reg_addr_high = high;
+ }
+ ret |= s5k4ecgx_write32(client, 0x002E, low);
+
+ return ret;
+}
+
+static int s5k4ecgx_read16(struct i2c_client *client, u16 *val)
+{
+ struct i2c_msg msg[2];
+ u16 subaddr = 0x0F12;
+ u8 buf[2];
+ int err;
+
+ subaddr = swab16(subaddr);
+
+ msg[0].addr = client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = (u8 *)&subaddr;
+
+ msg[1].addr = client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = 2;
+ msg[1].buf = buf;
+
+ err = i2c_transfer(client->adapter, msg, 2);
+ if (unlikely(err != 2)) {
+ dev_err(&client->dev, "Failed to read register 0x%02x!\n",
+ subaddr);
+ return -EIO;
+ }
+
+ *val = ((buf[0] << 8) | buf[1]);
+
+ return 0;
+}
+
+/*
+ * Access address will be remapped inside sensor (ARM7 core)
+ */
+static int s5k4ecgx_write_setup(struct v4l2_subdev *sd, u16 high, u16 low)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ int ret = 0;
+
+ if (priv->reg_type != TOK_WRITE) {
+ priv->reg_addr_high = 0;
+ priv->reg_addr_low = 0;
+ priv->reg_type = TOK_WRITE;
+ }
+
+ /* FIXME: no information about 0x0028 in the datasheet */
+ if (priv->reg_addr_high != high) {
+ ret = s5k4ecgx_write32(client, 0x0028, high);
+ priv->reg_addr_high = high;
+ priv->reg_addr_low = 0;
+ }
+
+ /* FIXME: no information about 0x002A in the datasheet */
+ if (priv->reg_addr_low != low) {
+ ret |= s5k4ecgx_write32(client, 0x002A, low);
+ priv->reg_addr_low = low;
+ }
+
+ return ret;
+}
+
+static int s5k4ecgx_write_ctrl(struct v4l2_subdev *sd, u32 addr, u16 data)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int ret;
+
+ v4l2_dbg(1, debug, sd, "Ctrl register val 0x%4x\n", data);
+ s5k4ecgx_write_setup(sd, addr >> 16, addr & 0xffff);
+ ret = s5k4ecgx_write32(client, 0x0F12, data);
+
+ return ret;
+}
+
+static u8 *s5k4ecgx_prep_buffer(int *cnt, struct regval_list **pos)
+{
+ struct regval_list *p_cur = *pos;
+ int burst_len = 0, len;
+ u8 *p_buf;
+
+ while (p_cur->type != TOK_TERM) {
+ /*
+ * Make sure two bytes data are used and address is continous
+ * to write them in a block
+ */
+ burst_len += 2;
+ if (TOK_WRITE != (p_cur + 1)->type)
+ break;
+ if ((p_cur->addr + 2) != (p_cur + 1)->addr)
+ break;
+ p_cur += 1;
+ }
+ p_buf = vmalloc(burst_len + 2);
+ if (!p_buf)
+ return NULL;
+
+ p_buf[0] = 0x0F; /* FIXME: no information in the datasheet */
+ p_buf[1] = 0x12;
+ p_cur = *pos;
+ len = 2;
+ burst_len += 2; /* Add two bytes */
+ while (1) {
+ p_buf[len] = MSB(p_cur->val);
+ p_buf[len + 1] = LSB(p_cur->val);
+ len += 2;
+ if (len < burst_len)
+ p_cur++;
+ else
+ break;
+ }
+ *pos = p_cur;
+ *cnt = burst_len ;
+
+ return p_buf;
+}
+
+static int s5k4ecgx_write_burst(struct v4l2_subdev *sd,
+ struct regval_list **pos)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct regval_list *p_cur = *pos;
+ int burst_len, ret = 0;
+ u8 *p_buf;
+
+ /* Select starting address of burst data */
+ s5k4ecgx_write_setup(sd, p_cur->addr >> 16, p_cur->addr & 0xffff);
+
+ /* Make buffer and then copy data into it */
+ p_buf = s5k4ecgx_prep_buffer(&burst_len, pos);
+ if (!p_buf)
+ return -ENOMEM;
+ ret = s5k4ecgx_write_i2c(client, p_buf, burst_len);
+ vfree(p_buf);
+ priv->reg_addr_low = 0;
+
+ return ret;
+}
+
+static int s5k4ecgx_write_array(struct v4l2_subdev *sd,
+ struct regval_list *vals)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int err = 0;
+
+ while (vals->type != TOK_TERM && !err) {
+ switch (vals->type) {
+ case TOK_WRITE:
+ /*
+ * This function continues to check the
+ * following addresses, then update the address of vals
+ */
+ err = s5k4ecgx_write_burst(sd, &vals);
+ break;
+ case TOK_CMD:
+ err = s5k4ecgx_write32(client, vals->addr, vals->val);
+ break;
+ case TOK_DELAY:
+ msleep(vals->val);
+ break;
+ default:
+ v4l2_err(sd, "Failed to detect i2c type!\n");
+ err = -EINVAL;
+ break;
+ }
+ vals++;
+ }
+
+ if (unlikely(vals->type != TOK_TERM) || err)
+ v4l2_err(sd, "Failed to write array!\n");
+
+ return err;
+}
+
+static void s5k4ecgx_init_parameters(struct v4l2_subdev *sd)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ int err = 0;
+
+ priv->streaming = 0;
+ /* brigthness default */
+ err = s5k4ecgx_write_array(sd, s5k4ecgx_ev_default);
+ /* no image effect */
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_effect_normal);
+ /* white blance auto */
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_wb_auto);
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_contrast_default);
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_iso_auto);
+ /* default 30 FPS */
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_fps_30);
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_scene_default);
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_saturation_default);
+ err |= s5k4ecgx_write_array(sd, s5k4ecgx_sharpness_default);
+
+ if (err)
+ v4l2_err(sd, "Failed to write init params!\n");
+}
+
+static void s5k4ecgx_set_framesize(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *in)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ struct s5k4ecgx_framesize *a = p_sets;
+ struct s5k4ecgx_framesize *z = p_sets + S5K4ECGX_NUM_PREV - 1;
+
+ /* If not match, assign the biggest size */
+ while (a != z) {
+ if (a->width == in->width && a->height == in->height)
+ break;
+ a++;
+ }
+ priv->p_now = a;
+}
+
+static int s5k4ecgx_get_pixfmt_index(struct s5k4ecgx *priv,
+ struct v4l2_mbus_framefmt *mf)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(s5k4ecgx_formats); i++)
+ if (mf->colorspace == s5k4ecgx_formats[i].colorspace &&
+ mf->code == s5k4ecgx_formats[i].code)
+ return i;
+
+ return 0;
+}
+
+static void s5k4ecgx_try_fmt(struct s5k4ecgx *priv,
+ struct v4l2_mbus_framefmt *mf)
+{
+ unsigned int index;
+
+ v4l_bound_align_image(&mf->width, S5K4ECGX_WIN_WIDTH_MIN,
+ S5K4ECGX_WIN_WIDTH_MAX, 1, &mf->height,
+ S5K4ECGX_WIN_HEIGHT_MIN, S5K4ECGX_WIN_HEIGHT_MAX, 1, 0);
+
+ if (mf->colorspace != V4L2_COLORSPACE_JPEG)
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ index = s5k4ecgx_get_pixfmt_index(priv, mf);
+ mf->colorspace = s5k4ecgx_formats[0].colorspace;
+ mf->code = s5k4ecgx_formats[0].code;
+ mf->field = V4L2_FIELD_NONE;
+}
+
+static int s5k4ecgx_read_fw_ver(struct v4l2_subdev *sd)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u16 fw_ver = 0, hw_rev = 0;
+
+ s5k4ecgx_read_setup(sd, REG_FW_VERSION);
+ s5k4ecgx_read16(client, &fw_ver);
+ if (fw_ver != S5K4ECGX_FW_VERSION) {
+ v4l2_err(sd, "FW version check failed!");
+ return -ENODEV;
+ }
+ s5k4ecgx_read_setup(sd, REG_FW_REVISION);
+ s5k4ecgx_read16(client, &hw_rev);
+
+ if (hw_rev == S5K4ECGX_REVISION_1_1) {
+ v4l2_info(sd, "chip found FW ver: 0x%X, HW rev: 0x%X\n",
+ fw_ver, hw_rev);
+ } else {
+ v4l2_err(sd, "chip found but it has unknown revision 0x%x\n",
+ hw_rev);
+ return -ENODEV;
+ };
+
+ return 0;
+}
+
+static int s5k4ecgx_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(s5k4ecgx_formats))
+ return -EINVAL;
+ code->code = s5k4ecgx_formats[code->index].code;
+
+ return 0;
+}
+
+static int s5k4ecgx_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ int i = ARRAY_SIZE(s5k4ecgx_formats);
+
+ if (fse->index > 0)
+ return -EINVAL;
+
+ while (--i)
+ if (fse->code == s5k4ecgx_formats[i].code)
+ break;
+
+ fse->code = s5k4ecgx_formats[i].code;
+ fse->min_width = S5K4ECGX_WIN_WIDTH_MIN;
+ fse->max_width = S5K4ECGX_WIN_WIDTH_MAX;
+ fse->max_height = S5K4ECGX_WIN_HEIGHT_MIN;
+ fse->min_height = S5K4ECGX_WIN_HEIGHT_MAX;
+
+ return 0;
+}
+
+static int s5k4ecgx_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ struct v4l2_mbus_framefmt *mf;
+
+ memset(fmt->reserved, 0, sizeof(fmt->reserved));
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(fh, 0);
+ fmt->format = *mf;
+ return 0;
+ }
+ mutex_lock(&priv->lock);
+ fmt->format.width = priv->p_now->width;
+ fmt->format.height = priv->p_now->height;
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+static int s5k4ecgx_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ struct s5k4ecgx_preset *preset = priv->preset;
+ struct v4l2_mbus_framefmt *mf;
+ struct v4l2_rect *crop;
+ int ret = 0;
+
+ mutex_lock(&priv->lock);
+ s5k4ecgx_try_fmt(priv, &fmt->format);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(fh, fmt->pad);
+ crop = v4l2_subdev_get_try_crop(fh, 0);
+ } else {
+ if (priv->streaming)
+ ret = -EBUSY;
+ else
+ mf = &preset->mbus_fmt;
+ }
+ if (ret == 0) {
+ *mf = fmt->format;
+ s5k4ecgx_set_framesize(sd, &fmt->format);
+ }
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_pad_ops s5k4ecgx_pad_ops = {
+ .enum_mbus_code = s5k4ecgx_enum_mbus_code,
+ .enum_frame_size = s5k4ecgx_enum_frame_size,
+ .get_fmt = s5k4ecgx_get_fmt,
+ .set_fmt = s5k4ecgx_set_fmt,
+};
+
+/*
+ * V4L2 subdev controls
+ */
+static int s5k4ecgx_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+
+ struct v4l2_subdev *sd = &container_of(ctrl->handler, struct s5k4ecgx,
+ handler)->sd;
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ int err = 0;
+
+ v4l2_dbg(1, debug, sd, "ctrl: 0x%x, value: %d\n", ctrl->id, ctrl->val);
+ mutex_lock(&priv->lock);
+
+ switch (ctrl->id) {
+ case V4L2_CID_CONTRAST:
+ err = s5k4ecgx_write_ctrl(sd, REG_USER_CONTRAST, ctrl->val);
+ break;
+
+ case V4L2_CID_SATURATION:
+ err = s5k4ecgx_write_ctrl(sd, REG_USER_SATURATION, ctrl->val);
+ break;
+
+ case V4L2_CID_SHARPNESS:
+ err |= s5k4ecgx_write_ctrl(sd, REG_USER_SHARP1, ctrl->val);
+ err |= s5k4ecgx_write_ctrl(sd, REG_USER_SHARP2, ctrl->val);
+ err |= s5k4ecgx_write_ctrl(sd, REG_USER_SHARP3, ctrl->val);
+ err |= s5k4ecgx_write_ctrl(sd, REG_USER_SHARP4, ctrl->val);
+ err |= s5k4ecgx_write_ctrl(sd, REG_USER_SHARP5, ctrl->val);
+ break;
+
+ case V4L2_CID_BRIGHTNESS:
+ err = s5k4ecgx_write_ctrl(sd, REG_USER_BRIGHTNESS, ctrl->val);
+ break;
+ default:
+ v4l2_dbg(1, debug, sd, "unknown set ctrl id 0x%x\n", ctrl->id);
+ err = -ENOIOCTLCMD;
+ break;
+ }
+
+ /* Review this */
+ priv->reg_type = TOK_TERM;
+
+ mutex_unlock(&priv->lock);
+
+ if (err < 0)
+ v4l2_err(sd, "Failed to write videoc_s_ctrl err %d\n", err);
+
+ return err;
+}
+
+static const struct v4l2_ctrl_ops s5k4ecgx_ctrl_ops = {
+ .s_ctrl = s5k4ecgx_s_ctrl,
+};
+
+/*
+ * Reading s5k4ecgx version information
+ */
+static int s5k4ecgx_registered(struct v4l2_subdev *sd)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ int ret;
+
+ if (!priv->set_power) {
+ v4l2_err(sd, "Error: power callback undefined!\n");
+ return -EIO;
+ }
+
+ mutex_lock(&priv->lock);
+ priv->set_power(true);
+ /* Time to stablize sensor */
+ mdelay(priv->mdelay);
+ ret = s5k4ecgx_read_fw_ver(sd);
+ priv->set_power(false);
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+/*
+ * V4L2 subdev internal operations
+ */
+static int s5k4ecgx_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+
+ struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0);
+ struct v4l2_rect *crop = v4l2_subdev_get_try_crop(fh, 0);
+
+ format->colorspace = s5k4ecgx_formats[0].colorspace;
+ format->code = s5k4ecgx_formats[0].code;
+ format->width = S5K4ECGX_OUT_WIDTH_DEF;
+ format->height = S5K4ECGX_OUT_HEIGHT_DEF;
+ format->field = V4L2_FIELD_NONE;
+
+ crop->width = S5K4ECGX_WIN_WIDTH_MAX;
+ crop->height = S5K4ECGX_WIN_HEIGHT_MAX;
+ crop->left = 0;
+ crop->top = 0;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops s5k4ecgx_subdev_internal_ops = {
+ .registered = s5k4ecgx_registered,
+ .open = s5k4ecgx_open,
+};
+
+static int s5k4ecgx_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+
+ if (!priv->set_power)
+ return -EIO;
+
+ v4l2_dbg(1, debug, sd, "Switching %s\n", on ? "on" : "off");
+
+ if (on) {
+ priv->set_power(on);
+ /* Time to stablize sensor */
+ mdelay(priv->mdelay);
+ /* Loading firmware into ARM7 core of sensor */
+ if (s5k4ecgx_write_array(sd, s5k4ecgx_init_regs) < 0) {
+ priv->set_power(0); /* Turn off power */
+ return -EIO;
+ }
+ s5k4ecgx_init_parameters(sd);
+ } else {
+ priv->set_power(0);
+ }
+
+ return 0;
+}
+
+static int s5k4ecgx_log_status(struct v4l2_subdev *sd)
+{
+ v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops s5k4ecgx_core_ops = {
+ .s_power = s5k4ecgx_s_power,
+ .log_status = s5k4ecgx_log_status,
+};
+
+static int __s5k4ecgx_s_stream(struct v4l2_subdev *sd, int on)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ int err = 0;
+
+ if (on)
+ err = s5k4ecgx_write_array(sd, pview_size[priv->p_now->idx]);
+
+ return err;
+}
+
+static int s5k4ecgx_s_stream(struct v4l2_subdev *sd, int on)
+{
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+ int ret = 0;
+
+ v4l2_dbg(1, debug, sd, "Turn streaming %s\n", on ? "on" : "off");
+ mutex_lock(&priv->lock);
+
+ if (on) {
+ /* Ignore if s_stream is called twice */
+ if (!priv->streaming) {
+ ret = __s5k4ecgx_s_stream(sd, on);
+ if (!ret)
+ priv->streaming = on;
+ }
+ } else {
+ priv->streaming = 0;
+ }
+
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_video_ops s5k4ecgx_video_ops = {
+ .s_stream = s5k4ecgx_s_stream,
+};
+
+static const struct v4l2_subdev_ops s5k4ecgx_ops = {
+ .core = &s5k4ecgx_core_ops,
+ .pad = &s5k4ecgx_pad_ops,
+ .video = &s5k4ecgx_video_ops,
+};
+
+static int s5k4ecgx_initialize_ctrls(struct s5k4ecgx *priv)
+{
+ const struct v4l2_ctrl_ops *ops = &s5k4ecgx_ctrl_ops;
+ struct v4l2_ctrl_handler *hdl = &priv->handler;
+ int ret;
+
+ ret = v4l2_ctrl_handler_init(hdl, 16);
+ if (ret)
+ return ret;
+
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -208, 127, 1, 0);
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -127, 127, 1, 0);
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION, -127, 127, 1, 0);
+
+ /* For sharpness, 0x6024 is default value */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, -32704, 24612, 8208,
+ 24612);
+ if (hdl->error) {
+ ret = hdl->error;
+ v4l2_ctrl_handler_free(hdl);
+ return ret;
+ }
+ priv->sd.ctrl_handler = hdl;
+
+ return 0;
+};
+
+/*
+ * Set initial values for all preview presets
+ */
+static void s5k4ecgx_presets_data_init(struct s5k4ecgx *priv)
+{
+ struct s5k4ecgx_preset *preset = &priv->presets[0];
+ int i;
+
+ for (i = 0; i < S5K4ECGX_MAX_PRESETS; i++) {
+ preset->mbus_fmt.width = S5K4ECGX_OUT_WIDTH_DEF;
+ preset->mbus_fmt.height = S5K4ECGX_OUT_HEIGHT_DEF;
+ preset->mbus_fmt.code = s5k4ecgx_formats[0].code;
+ preset->index = i;
+ preset->clk_id = 0;
+ preset++;
+ }
+ priv->preset = &priv->presets[0];
+}
+
+/*
+ * Fetching platform data is being done with s_config subdev call.
+ * In probe routine, we just register subdev device
+ */
+static int s5k4ecgx_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct v4l2_subdev *sd;
+ struct s5k4ecgx *priv;
+ struct s5k4ecgx_platform_data *pdata = client->dev.platform_data;
+ int ret;
+
+ if (pdata == NULL) {
+ dev_err(&client->dev, "platform data is missing!\n");
+ return -EINVAL;
+ }
+ priv = kzalloc(sizeof(struct s5k4ecgx), GFP_KERNEL);
+
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_init(&priv->lock);
+
+ priv->set_power = pdata->set_power;
+ priv->mdelay = pdata->mdelay;
+
+ sd = &priv->sd;
+ /* Registering subdev */
+ v4l2_i2c_subdev_init(sd, client, &s5k4ecgx_ops);
+ strlcpy(sd->name, S5K4ECGX_DRIVER_NAME, sizeof(sd->name));
+
+ sd->internal_ops = &s5k4ecgx_subdev_internal_ops;
+ /* Support v4l2 sub-device userspace API */
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ priv->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
+ ret = media_entity_init(&sd->entity, 1, &priv->pad, 0);
+ if (ret)
+ goto out_err;
+
+ ret = s5k4ecgx_initialize_ctrls(priv);
+ s5k4ecgx_presets_data_init(priv);
+
+ if (ret)
+ goto out_err;
+
+ return 0;
+
+ out_err:
+ media_entity_cleanup(&priv->sd.entity);
+ kfree(priv);
+
+ return ret;
+}
+
+static int s5k4ecgx_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+
+ mutex_destroy(&priv->lock);
+ v4l2_device_unregister_subdev(sd);
+ v4l2_ctrl_handler_free(&priv->handler);
+ media_entity_cleanup(&sd->entity);
+ kfree(priv);
+
+ return 0;
+}
+
+static const struct i2c_device_id s5k4ecgx_id[] = {
+ { S5K4ECGX_DRIVER_NAME, 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, s5k4ecgx_id);
+
+static struct i2c_driver v4l2_i2c_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = S5K4ECGX_DRIVER_NAME,
+ },
+ .probe = s5k4ecgx_probe,
+ .remove = s5k4ecgx_remove,
+ .id_table = s5k4ecgx_id,
+};
+
+module_i2c_driver(v4l2_i2c_driver);
+
+MODULE_DESCRIPTION("Samsung S5K4ECGX 5MP SOC camera");
+MODULE_AUTHOR("Sangwook Lee <sangwook.lee@xxxxxxxxxx>");
+MODULE_AUTHOR("Seok-Young Jang <quartz.jang@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/include/media/s5k4ecgx.h b/include/media/s5k4ecgx.h
new file mode 100644
index 0000000..e041761
--- /dev/null
+++ b/include/media/s5k4ecgx.h
@@ -0,0 +1,29 @@
+/*
+ * S5K4ECGX Platform data header
+ *
+ * Copyright (C) 2012, Linaro
+ *
+ * Copyright (C) 2010, SAMSUNG ELECTRONICS
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef S5K4ECGX_H
+#define S5K4ECGX_H
+
+/**
+ * struct ss5k4ecgx_platform_data- s5k4ecgx driver platform data
+ * @set_power: an callback to give the chance to turn off/on
+ * camera which is depending on the board code
+ * @mdelay : delay (ms) needed after enabling power
+ */
+
+struct s5k4ecgx_platform_data {
+ int (*set_power)(int);
+ int mdelay;
+};
+
+#endif /* S5K4ECGX_H */
--
1.7.9.5
--
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