This driver implements preview mode of the S5K4ECGX sensor.
capture (snapshot) operation, face detection are missing now.
Following controls are supported:
contrast/saturation/brightness/sharpness
Signed-off-by: Sangwook Lee <sangwook....@linaro.org>
---
drivers/media/video/Kconfig | 8 +
drivers/media/video/Makefile | 1 +
drivers/media/video/s5k4ecgx.c | 839 ++++++++++++++++++++++++++++++++++++++++
include/media/s5k4ecgx.h | 39 ++
4 files changed, 887 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 c128fac..2c3f434 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -580,6 +580,14 @@ 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 MEDIA_CAMERA_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 b7da9fa..ec39c47 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -80,6 +80,7 @@ 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..cfc90b8
--- /dev/null
+++ b/drivers/media/video/s5k4ecgx.c
@@ -0,0 +1,839 @@
+/*
+ * Driver for s5k4ecgx (5MP Camera) from Samsung
+ * a quarter-inch optical format 1.4 micron 5 megapixel (Mp)
+ * CMOS image sensor.
+ *
+ * Copyright (C) 2012, Linaro, Sangwook Lee <sangwook....@linaro.org>
+ * Copyright (C) 2012, Insignal Co,. Ltd, Homin Lee <suap...@insignal.co.kr>
+ *
+ * Based on s5k6aa, noon010pc30 driver
+ * Copyright (C) 2011, Samsung Electronics Co., Ltd.
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <media/media-entity.h>
+#include <media/s5k4ecgx.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-mediabus.h>
+#include <media/v4l2-subdev.h>
+
+#include "s5k4ecgx_regs.h"
+
+static int debug;
+module_param(debug, int, 0644);
+
+#define S5K4ECGX_DRIVER_NAME "s5k4ecgx"
+
+/* Firmware revision information */
+#define REG_FW_REVISION 0x700001a6
+#define REG_FW_VERSION 0x700001a4
+#define S5K4ECGX_REVISION_1_1 0x11
+#define S5K4ECGX_FW_VERSION 0x4ec0
+
+/* General purpose parameters */
+#define REG_USER_BRIGHTNESS 0x7000022c /* Brigthness */
+#define REG_USER_CONTRAST 0x7000022e /* Contrast */
+#define REG_USER_SATURATION 0x70000230 /* Saturation */
+
+#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
+
+/* Reduce sharpness range for user space API */
+#define SHARPNESS_DIV 8208
+
+#define TOK_TERM 0xffffffff
+
+/*
+ * FIMXE: This is copied from s5k6aa, because of no information
+ * in s5k4ecgx's datasheet
+ * H/W register Interface (0xd0000000 - 0xd0000fff)
+ */
+#define AHB_MSB_ADDR_PTR 0xfcfc
+#define GEN_REG_OFFSH 0xd000
+#define REG_CMDWR_ADDRH 0x0028
+#define REG_CMDWR_ADDRL 0x002a
+#define REG_CMDRD_ADDRH 0x002c
+#define REG_CMDRD_ADDRL 0x002e
+#define REG_CMDBUF0_ADDR 0x0f12
+
+/*
+ * Preview size lists supported by sensor
+ */
+static const struct regval_list *prev_regs[] = {
+ s5k4ecgx_176_preview,
+ s5k4ecgx_352_preview,
+ s5k4ecgx_640_preview,
+ s5k4ecgx_720_preview,
+};
+
+struct s5k4ecgx_frmsize {
+ u32 idx; /* Should indicate index of prev_regs */
+ u32 width;
+ u32 height;
+};
+
+/*
+ * TODO: currently only preview is supported and snapshopt(capture)
+ * is not implemented yet
+ */
+static const struct s5k4ecgx_frmsize s5k4ecgx_sizes[] = {
+ {0, 176, 144},
+ {1, 352, 288},
+ {2, 640, 480},
+ {3, 720, 480},
+};
+
+#define S5K4ECGX_NUM_PREV ARRAY_SIZE(s5k4ecgx_sizes)
+
+struct s5k4ecgx_format {
+ enum v4l2_mbus_pixelcode code;
+ u32 colorspace;
+};
+
+/* By default value, output from sensor will be YUV422 0-255 */
+static const struct s5k4ecgx_format s5k4ecgx_formats[] = {
+ { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG },
+};
+
+static const char * const s5k4ecgx_supply_names[] = {
+ /*
+ * vdd_2.8v is for Analog power supply 2.8V(vdda)
+ * and Digital IO(vddio, vddd_core)
+ */
+ "vdd_2.8v",
+ /* vdd_1.8v is for regulator input */
+ "vdd_1.8v",
+};
+
+#define S5K4ECGX_NUM_SUPPLIES ARRAY_SIZE(s5k4ecgx_supply_names)
+
+enum s5k4ecgx_gpio_id {
+ STBY,
+ RST,
+ GPIO_NUM,
+};
+
+struct s5k4ecgx {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+ struct v4l2_ctrl_handler handler;
+
+ struct s5k4ecgx_platform_data *pdata;
+ const struct s5k4ecgx_format *curr_fmt;
+ const struct s5k4ecgx_frmsize *curr_win;
+ struct v4l2_fract timeperframe;
+ struct mutex lock;
+ int streaming;
+
+ struct regulator_bulk_data supplies[S5K4ECGX_NUM_SUPPLIES];
+ struct s5k4ecgx_gpio gpio[GPIO_NUM];
+ int msleep;
+};
+
+static inline struct s5k4ecgx *to_s5k4ecgx(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct s5k4ecgx, sd);
+}
+
+static int s5k4ecgx_i2c_read(struct i2c_client *client, u16 addr, u16 *val)
+{
+ u8 wbuf[2] = { addr >> 8, addr & 0xff };
+ struct i2c_msg msg[2];
+ u8 rbuf[2];
+ int ret;
+
+ msg[0].addr = client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 2;
+ msg[0].buf = wbuf;
+
+ msg[1].addr = client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = 2;
+ msg[1].buf = rbuf;
+
+ ret = i2c_transfer(client->adapter, msg, 2);
+ *val = be16_to_cpu(*((u16 *)rbuf));
+
+ v4l2_dbg(3, debug, client, "i2c_read: 0x%04X : 0x%04x\n", addr, *val);
+
+ return ret == 2 ? 0 : ret;
+}
+
+static int s5k4ecgx_i2c_write(struct i2c_client *client, u16 addr, u16 val)
+{
+ u8 buf[4] = { addr >> 8, addr & 0xff, val >> 8, val & 0xff };
+
+ int ret = i2c_master_send(client, buf, 4);
+ v4l2_dbg(4, debug, client, "i2c_write: 0x%04X : 0x%04x\n", addr, val);
+
+ return ret == 4 ? 0 : ret;
+}
+
+static int s5k4ecgx_write(struct i2c_client *client, u32 addr, u16 val)
+{
+ int ret = 0;
+ u16 high = addr >> 16, low = addr & 0xffff;
+
+ ret = s5k4ecgx_i2c_write(client, REG_CMDWR_ADDRH, high);
+ ret |= s5k4ecgx_i2c_write(client, REG_CMDWR_ADDRL, low);
+ ret |= s5k4ecgx_i2c_write(client, REG_CMDBUF0_ADDR, val);
+ if (ret)
+ return -ENODEV;
+
+ return 0;
+}
+
+static int s5k4ecgx_read(struct i2c_client *client, u32 addr, u16 *val)
+{
+ int ret = 0;
+ u16 high = addr >> 16, low = addr & 0xffff;
+
+ ret = s5k4ecgx_i2c_write(client, REG_CMDRD_ADDRH, high);
+ ret |= s5k4ecgx_i2c_write(client, REG_CMDRD_ADDRL, low);
+ ret |= s5k4ecgx_i2c_read(client, REG_CMDBUF0_ADDR, val);
+ if (ret) {
+ dev_err(&client->dev, "Failed to execute read command\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int s5k4ecgx_set_ahb_address(struct v4l2_subdev *sd)
+{
+ int ret;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ /* Set APB peripherals start address */
+ ret = s5k4ecgx_i2c_write(client, AHB_MSB_ADDR_PTR, GEN_REG_OFFSH);
+ if (ret)
+ return ret;
+ /*
+ * FIMXE: This is copied from s5k6aa, because of no information
+ * in s5k4ecgx's datasheet.
+ * sw_reset is activated to put device into idle status
+ */
+ ret = s5k4ecgx_i2c_write(client, 0x0010, 0x0001);
+ if (ret)
+ return ret;
+
+ /* FIXME: no information avaialbe about this register */
+ ret = s5k4ecgx_i2c_write(client, 0x1030, 0x0000);
+ if (ret)
+ return ret;
+ /* Halt ARM CPU */
+ ret = s5k4ecgx_i2c_write(client, 0x0014, 0x0001);
+
+ return ret;
+}
+
+static int s5k4ecgx_write_array(struct v4l2_subdev *sd,
+ const struct regval_list *reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u16 addr_incr = 0;
+ int ret = 0;
+
+ while (reg->addr != TOK_TERM) {
+ if (addr_incr != 2)
+ ret = s5k4ecgx_write(client, reg->addr, reg->val);
+ else
+ ret = s5k4ecgx_i2c_write(client, REG_CMDBUF0_ADDR,
+ reg->val);
+ if (ret)
+ break;
+ /* Assume that msg->addr is always less than 0xfffc */
+ addr_incr = (reg + 1)->addr - reg->addr;
+ reg++;
+ }
+
+ return ret;
+}
+
+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;
+ int ret;
+
+ ret = s5k4ecgx_read(client, REG_FW_VERSION, &fw_ver);
+ if (fw_ver != S5K4ECGX_FW_VERSION && ret) {
+ v4l2_err(sd, "FW version check failed!");
+ return -ENODEV;
+ }
+
+ ret = s5k4ecgx_read(client, REG_FW_REVISION, &hw_rev);
+ if (ret)
+ return ret;
+
+ 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, "Unknown H/W revision 0x%x\n", hw_rev);
+ return -ENODEV;
+ };
+
+ return 0;
+}
+
+static int s5k4ecgx_init_sensor(struct v4l2_subdev *sd)
+{
+ int ret = 0;
+
+ ret = s5k4ecgx_set_ahb_address(sd);
+ /* The delay is from manufacturer's settings */
+ msleep(100);
+
+ ret |= s5k4ecgx_write_array(sd, s5k4ecgx_apb_regs);
+ ret |= s5k4ecgx_write_array(sd, s5k4ecgx_img_regs);
+
+ if (ret)
+ v4l2_err(sd, "Failed to write initial settings\n");
+
+ return 0;
+}
+
+static int s5k4ecgx_gpio_set_value(struct s5k4ecgx *priv, int id, u32 val)
+{
+ if (!gpio_is_valid(priv->gpio[id].gpio))
+ return 0;
+ gpio_set_value(priv->gpio[id].gpio, val);
+
+ return 1;
+}
+
+static int __s5k4ecgx_power_on(struct s5k4ecgx *priv)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(S5K4ECGX_NUM_SUPPLIES, priv->supplies);
+ if (ret)
+ return ret;
+ usleep_range(30, 50);
+
+ /* The polarity of STBY is controlled by TSP */
+ if (s5k4ecgx_gpio_set_value(priv, STBY, priv->gpio[STBY].level))
+ usleep_range(30, 50);
+
+ if (s5k4ecgx_gpio_set_value(priv, RST, priv->gpio[RST].level))
+ usleep_range(30, 50);
+
+ return 0;
+}
+
+static int __s5k4ecgx_power_off(struct s5k4ecgx *priv)
+{
+ if (s5k4ecgx_gpio_set_value(priv, RST, !priv->gpio[RST].level))
+ usleep_range(30, 50);
+
+ if (s5k4ecgx_gpio_set_value(priv, STBY, !priv->gpio[STBY].level))
+ usleep_range(30, 50);
+
+ priv->streaming = 0;
+
+ return regulator_bulk_disable(S5K4ECGX_NUM_SUPPLIES, priv->supplies);
+}
+
+/* Find nearest matching image pixel size. */
+static int s5k4ecgx_try_frame_size(struct v4l2_mbus_framefmt *mf,
+ const struct s5k4ecgx_frmsize **size)
+{
+ unsigned int min_err = ~0;
+ int i = ARRAY_SIZE(s5k4ecgx_sizes);
+ const struct s5k4ecgx_frmsize *fsize = &s5k4ecgx_sizes[0],
+ *match = NULL;
+
+ while (i--) {
+ int err = abs(fsize->width - mf->width)
+ + abs(fsize->height - mf->height);
+ if (err < min_err) {
+ min_err = err;
+ match = fsize;
+ }
+ fsize++;
+ }
+ if (match) {
+ mf->width = match->width;
+ mf->height = match->height;
+ if (size)
+ *size = match;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+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_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;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ if (fh) {
+ mf = v4l2_subdev_get_try_format(fh, 0);
+ fmt->format = *mf;
+ }
+ return 0;
+ }
+ mf = &fmt->format;
+
+ mutex_lock(&priv->lock);
+ mf->width = priv->curr_win->width;
+ mf->height = priv->curr_win->height;
+ mf->code = priv->curr_fmt->code;
+ mf->colorspace = priv->curr_fmt->colorspace;
+ mf->field = V4L2_FIELD_NONE;
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+static const struct s5k4ecgx_format *s5k4ecgx_try_fmt(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *mf)
+{
+ int i = ARRAY_SIZE(s5k4ecgx_formats);
+
+ while (--i)
+ if (mf->code == s5k4ecgx_formats[i].code)
+ break;
+ mf->code = s5k4ecgx_formats[i].code;
+
+ return &s5k4ecgx_formats[i];
+}
+
+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);
+ const struct s5k4ecgx_frmsize *size = NULL;
+ const struct s5k4ecgx_format *sf;
+ struct v4l2_mbus_framefmt *mf;
+ int ret = 0;
+
+ sf = s5k4ecgx_try_fmt(sd, &fmt->format);
+ s5k4ecgx_try_frame_size(&fmt->format, &size);
+ fmt->format.colorspace = V4L2_COLORSPACE_JPEG;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ if (fh) {
+ mf = v4l2_subdev_get_try_format(fh, 0);
+ *mf = fmt->format;
+ }
+ return 0;
+ }
+
+ mutex_lock(&priv->lock);
+ if (!priv->streaming) {
+ s5k4ecgx_try_frame_size(&fmt->format, &size);
+ priv->curr_win = size;
+ priv->curr_fmt = sf;
+ } else {
+ ret = -EBUSY;
+ }
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_pad_ops s5k4ecgx_pad_ops = {
+ .enum_mbus_code = s5k4ecgx_enum_mbus_code,
+ .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 i2c_client *client = v4l2_get_subdevdata(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(client, REG_USER_CONTRAST, ctrl->val);
+ break;
+
+ case V4L2_CID_SATURATION:
+ err = s5k4ecgx_write(client, REG_USER_SATURATION, ctrl->val);
+ break;
+
+ case V4L2_CID_SHARPNESS:
+ ctrl->val *= SHARPNESS_DIV;
+ err |= s5k4ecgx_write(client, REG_USER_SHARP1, ctrl->val);
+ err |= s5k4ecgx_write(client, REG_USER_SHARP2, ctrl->val);
+ err |= s5k4ecgx_write(client, REG_USER_SHARP3, ctrl->val);
+ err |= s5k4ecgx_write(client, REG_USER_SHARP4, ctrl->val);
+ err |= s5k4ecgx_write(client, REG_USER_SHARP5, ctrl->val);
+ break;
+
+ case V4L2_CID_BRIGHTNESS:
+ err = s5k4ecgx_write(client, REG_USER_BRIGHTNESS, ctrl->val);
+ break;
+ }
+ mutex_unlock(&priv->lock);
+ if (err < 0)
+ v4l2_err(sd, "Failed to write 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)
+{
+ int ret;
+ struct s5k4ecgx *priv = to_s5k4ecgx(sd);
+
+ mutex_lock(&priv->lock);
+ ret = __s5k4ecgx_power_on(priv);
+ if (!ret) {
+ ret = s5k4ecgx_read_fw_ver(sd);
+ __s5k4ecgx_power_off(priv);
+ }
+ 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 *mf = v4l2_subdev_get_try_format(fh, 0);
+
+ mf->width = s5k4ecgx_sizes[0].width;
+ mf->height = s5k4ecgx_sizes[0].height;
+ mf->code = s5k4ecgx_formats[0].code;
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ mf->field = V4L2_FIELD_NONE;
+
+ 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);
+ int ret;
+
+ v4l2_dbg(1, debug, sd, "Switching %s\n", on ? "on" : "off");
+
+ if (on) {
+ ret = __s5k4ecgx_power_on(priv);
+ if (!ret) {
+ /* Time to stablize sensor */
+ msleep(priv->msleep);
+ if (s5k4ecgx_init_sensor(sd) < 0) {
+ ret = __s5k4ecgx_power_off(priv);
+ return -EIO;
+ }
+ }
+ } else {
+ ret = __s5k4ecgx_power_off(priv);
+ }
+
+ 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, prev_regs[priv->curr_win->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 = 1;
+ }
+ }
+ 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,
+};
+
+/*
+ * GPIO setup
+ */
+static int s5k4ecgx_config_gpio(int nr, int val, const char *name)
+{
+ unsigned long flags = val ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
+ int ret;
+
+ if (!gpio_is_valid(nr))
+ return 0;
+ ret = gpio_request_one(nr, flags, name);
+ if (!ret)
+ gpio_export(nr, 0);
+
+ return ret;
+}
+
+static void s5k4ecgx_free_gpios(struct s5k4ecgx *priv)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(priv->gpio); i++) {
+ if (!gpio_is_valid(priv->gpio[i].gpio))
+ continue;
+ gpio_free(priv->gpio[i].gpio);
+ priv->gpio[i].gpio = -EINVAL;
+ }
+}
+
+static int s5k4ecgx_config_gpios(struct s5k4ecgx *priv,
+ const struct s5k4ecgx_platform_data *pdata)
+{
+ const struct s5k4ecgx_gpio *gpio = &pdata->gpio_stby;
+ int ret;
+
+ priv->gpio[STBY].gpio = -EINVAL;
+ priv->gpio[RST].gpio = -EINVAL;
+
+ ret = s5k4ecgx_config_gpio(gpio->gpio, gpio->level, "S5K4ECGX_STBY");
+
+ if (ret) {
+ s5k4ecgx_free_gpios(priv);
+ return ret;
+ }
+ priv->gpio[STBY] = *gpio;
+ if (gpio_is_valid(gpio->gpio))
+ gpio_set_value(gpio->gpio, 0);
+
+ gpio = &pdata->gpio_reset;
+
+ ret = s5k4ecgx_config_gpio(gpio->gpio, gpio->level, "S5K4ECGX_RST");
+ if (ret) {
+ s5k4ecgx_free_gpios(priv);
+ return ret;
+ }
+ priv->gpio[RST] = *gpio;
+ if (gpio_is_valid(gpio->gpio))
+ gpio_set_value(gpio->gpio, 0);
+
+ return 0;
+}
+
+static int s5k4ecgx_init_v4l2_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, 4);
+ 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);
+
+ /* Sharpness default is 24612, and then (24612/SHARPNESS_DIV) = 2 */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, -32704/SHARPNESS_DIV,
+ 24612/SHARPNESS_DIV, 1, 2);
+ if (hdl->error) {
+ ret = hdl->error;
+ v4l2_ctrl_handler_free(hdl);
+ return ret;
+ }
+ priv->sd.ctrl_handler = hdl;
+
+ return 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)
+{
+ int ret, i;
+ struct v4l2_subdev *sd;
+ struct s5k4ecgx *priv;
+ struct s5k4ecgx_platform_data *pdata = client->dev.platform_data;
+
+ 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->msleep = pdata->msleep;
+ priv->streaming = 0;
+
+ 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_err1;
+
+ ret = s5k4ecgx_config_gpios(priv, pdata);
+ if (ret) {
+ dev_err(&client->dev, "Failed to set gpios\n");
+ goto out_err2;
+ }
+ for (i = 0; i < S5K4ECGX_NUM_SUPPLIES; i++)
+ priv->supplies[i].supply = s5k4ecgx_supply_names[i];
+
+ ret = regulator_bulk_get(&client->dev, S5K4ECGX_NUM_SUPPLIES,
+ priv->supplies);
+ if (ret) {
+ dev_err(&client->dev, "Failed to get regulators\n");
+ goto out_err3;
+ }
+
+ ret = s5k4ecgx_init_v4l2_ctrls(priv);
+
+ if (ret)
+ goto out_err4;
+
+ return 0;
+
+out_err4:
+ regulator_bulk_free(S5K4ECGX_NUM_SUPPLIES, priv->supplies);
+out_err3:
+ s5k4ecgx_free_gpios(priv);
+out_err2:
+ media_entity_cleanup(&priv->sd.entity);
+out_err1:
+ 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....@linaro.org>");
+MODULE_AUTHOR("Seok-Young Jang <quartz.j...@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/media/s5k4ecgx.h b/include/media/s5k4ecgx.h
new file mode 100644
index 0000000..093d1b8
--- /dev/null
+++ b/include/media/s5k4ecgx.h
@@ -0,0 +1,39 @@
+/*
+ * S5K4ECGX image sensor header file
+ *
+ * Copyright (C) 2012, Linaro
+ * Copyright (C) 2011, Samsung Electronics Co., Ltd.
+ *
+ * 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 s5k4ecgx_gpio - data structure describing a GPIO
+ * @gpio : GPIO number
+ * @level: indicates active state of the @gpio
+ */
+struct s5k4ecgx_gpio {
+ int gpio;
+ int level;
+};
+
+/**
+ * struct ss5k4ecgx_platform_data- s5k4ecgx driver platform data
+ * @gpio_reset: GPIO driving RESET pin
+ * @gpio_stby : GPIO driving STBY pin
+ * @msleep : delay (ms) needed after enabling power
+ */
+
+struct s5k4ecgx_platform_data {
+ struct s5k4ecgx_gpio gpio_reset;
+ struct s5k4ecgx_gpio gpio_stby;
+ int msleep;
+};
+
+#endif /* S5K4ECGX_H */
--
1.7.9.5
--
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