This patch adds driver for S5K4ECGX sensor with embedded ISP SoC,
S5K4ECGX, which is a 5M CMOS Image sensor from Samsung
The 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.lee@xxxxxxxxxx>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
---
Changes since v5:
- deleted dummy lines
- fixed pointer errors in handling firmware
- updated comments
- added le32_to_cpu,le16_to_cpu
Changes since v4:
- replaced register tables with the function from Sylwester
- updated firmware parsing function with CRC32 check
firmware generator from user space:
git://git.linaro.org/people/sangwook/fimc-v4l2-app.git
Changes since v3:
- used request_firmware to configure initial settings
- added parsing functions to read initial settings
- updated regulator API
- reduced preview setting tables by experiment
Changes since v2:
- added GPIO (reset/stby) and regulators
- updated I2C read/write, based on s5k6aa datasheet
- fixed set_fmt errors
- reduced register tables a bit
- removed vmalloc
Changes since v1:
- fixed s_stream(0) when it called twice
- changed mutex_X position to be used when strictly necessary
- add additional s_power(0) in case that error happens
- update more accurate debugging statements
- remove dummy else
drivers/media/i2c/Kconfig | 7 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/s5k4ecgx.c | 1011 ++++++++++++++++++++++++++++++++++++++++++
include/media/s5k4ecgx.h | 37 ++
4 files changed, 1056 insertions(+)
create mode 100644 drivers/media/i2c/s5k4ecgx.c
create mode 100644 include/media/s5k4ecgx.h
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 9a5a059..55b3bbb 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -484,6 +484,13 @@ 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/i2c/smiapp/Kconfig"
comment "Flash devices"
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 088a460..a720812 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_VIDEO_MT9V032) += mt9v032.o
obj-$(CONFIG_VIDEO_SR030PC30) += sr030pc30.o
obj-$(CONFIG_VIDEO_NOON010PC30) += noon010pc30.o
obj-$(CONFIG_VIDEO_S5K6AA) += s5k6aa.o
+obj-$(CONFIG_VIDEO_S5K4ECGX) += s5k4ecgx.o
obj-$(CONFIG_VIDEO_ADP1653) += adp1653.o
obj-$(CONFIG_VIDEO_AS3645A) += as3645a.o
obj-$(CONFIG_VIDEO_SMIAPP_PLL) += smiapp-pll.o
diff --git a/drivers/media/i2c/s5k4ecgx.c b/drivers/media/i2c/s5k4ecgx.c
new file mode 100644
index 0000000..66107c8
--- /dev/null
+++ b/drivers/media/i2c/s5k4ecgx.c
@@ -0,0 +1,1011 @@
+/*
+ * 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.lee@xxxxxxxxxx>
+ * Copyright (C) 2012, Insignal Co,. Ltd, Homin Lee <suapapa@xxxxxxxxxxxxxx>
+ *
+ * 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/crc32.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.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>
+
+static int debug;
+module_param(debug, int, 0644);
+
+#define S5K4ECGX_DRIVER_NAME "s5k4ecgx"
+#define S5K4ECGX_FIRMWARE "s5k4ecgx.bin"
+
+/* 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
+#define REG_USER_CONTRAST 0x7000022e
+#define REG_USER_SATURATION 0x70000230
+
+#define REG_G_NEW_CFG_SYNC 0x7000024a
+#define REG_G_PREV_IN_WIDTH 0x70000250
+#define REG_G_PREV_IN_HEIGHT 0x70000252
+#define REG_G_PREV_IN_XOFFS 0x70000254
+#define REG_G_PREV_IN_YOFFS 0x70000256
+#define REG_G_CAP_IN_WIDTH 0x70000258
+#define REG_G_CAP_IN_HEIGHT 0x7000025a
+#define REG_G_CAP_IN_XOFFS 0x7000025c
+#define REG_G_CAP_IN_YOFFS 0x7000025e
+#define REG_G_INPUTS_CHANGE_REQ 0x70000262
+#define REG_G_ACTIVE_PREV_CFG 0x70000266
+#define REG_G_PREV_CFG_CHG 0x70000268
+#define REG_G_PREV_OPEN_AFTER_CH 0x7000026a
+
+/* Preview context register sets. n = 0...4. */
+#define PREG(n, x) ((n) * 0x30 + (x))
+#define REG_P_OUT_WIDTH(n) PREG(n, 0x700002a6)
+#define REG_P_OUT_HEIGHT(n) PREG(n, 0x700002a8)
+#define REG_P_FMT(n) PREG(n, 0x700002aa)
+#define REG_P_PVI_MASK(n) PREG(n, 0x700002b4)
+#define REG_P_FR_TIME_TYPE(n) PREG(n, 0x700002be)
+#define FR_TIME_DYNAMIC 0
+#define FR_TIME_FIXED 1
+#define FR_TIME_FIXED_ACCURATE 2
+#define REG_P_FR_TIME_Q_TYPE(n) PREG(n, 0x700002c0)
+#define FR_TIME_Q_DYNAMIC 0
+#define FR_TIME_Q_BEST_FRRATE 1
+#define FR_TIME_Q_BEST_QUALITY 2
+
+/* Frame period in 0.1 ms units */
+#define REG_P_MAX_FR_TIME(n) PREG(n, 0x700002c2)
+#define REG_P_MIN_FR_TIME(n) PREG(n, 0x700002c4)
+#define US_TO_FR_TIME(__t) ((__t) / 100)
+#define REG_P_PREV_MIRROR(n) PREG(n, 0x700002d0)
+#define REG_P_CAP_MIRROR(n) PREG(n, 0x700002d2)
+
+#define REG_G_PREVZOOM_IN_WIDTH 0x70000494
+#define REG_G_PREVZOOM_IN_HEIGHT 0x70000496
+#define REG_G_PREVZOOM_IN_XOFFS 0x70000498
+#define REG_G_PREVZOOM_IN_YOFFS 0x7000049a
+#define REG_G_CAPZOOM_IN_WIDTH 0x7000049c
+#define REG_G_CAPZOOM_IN_HEIGHT 0x7000049e
+#define REG_G_CAPZOOM_IN_XOFFS 0x700004a0
+#define REG_G_CAPZOOM_IN_YOFFS 0x700004a2
+
+/* n = 0...4 */
+#define REG_USER_SHARPNESS(n) (0x70000a28 + (n) * 0xb6)
+
+/* Reduce sharpness range for user space API */
+#define SHARPNESS_DIV 8208
+#define TOK_TERM 0xffffffff
+
+/*
+ * FIXME: This is copied from s5k6aa, because of no information
+ * in the S5K4ECGX 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
+
+struct s5k4ecgx_frmsize {
+ struct v4l2_frmsize_discrete size;
+ /* Fixed sensor matrix crop rectangle */
+ struct v4l2_rect input_window;
+};
+
+struct regval_list {
+ u32 addr;
+ u16 val;
+};
+
+/*
+ * TODO: currently only preview is supported and snapshot (capture)
+ * is not implemented yet
+ */
+static const struct s5k4ecgx_frmsize s5k4ecgx_prev_sizes[] = {
+ {
+ .size = { 176, 144 },
+ .input_window = { 0x00, 0x00, 0x928, 0x780 },
+ }, {
+ .size = { 352, 288 },
+ .input_window = { 0x00, 0x00, 0x928, 0x780 },
+ }, {
+ .size = { 640, 480 },
+ .input_window = { 0x00, 0x00, 0xa00, 0x780 },
+ }, {
+ .size = { 720, 480 },
+ .input_window = { 0x00, 0x00, 0xa00, 0x6a8 },
+ }
+};
+
+#define S5K4ECGX_NUM_PREV ARRAY_SIZE(s5k4ecgx_prev_sizes)
+
+struct s5k4ecgx_pixfmt {
+ enum v4l2_mbus_pixelcode code;
+ u32 colorspace;
+ /* REG_TC_PCFG_Format register value */
+ u16 reg_p_format;
+};
+
+/* By default value, output from sensor will be YUV422 0-255 */
+static const struct s5k4ecgx_pixfmt s5k4ecgx_formats[] = {
+ { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG, 5 },
+};
+
+static const char * const s5k4ecgx_supply_names[] = {
+ /*
+ * Usually 2.8V is used for analog power (vdda)
+ * and digital IO (vddio, vddd_core)
+ */
+ "vdda",
+ "vddio",
+ "vddcore",
+ "vddreg", /* The internal s5k4ecgx regulator's supply (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_pixfmt *curr_pixfmt;
+ const struct s5k4ecgx_frmsize *curr_frmsize;
+ struct mutex lock;
+ u8 streaming;
+ u8 set_params;
+
+ struct regulator_bulk_data supplies[S5K4ECGX_NUM_SUPPLIES];
+ struct s5k4ecgx_gpio gpio[GPIO_NUM];
+};
+
+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(4, 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)
+{
+ u16 high = addr >> 16, low = addr & 0xffff;
+ int ret;
+
+ v4l2_dbg(3, debug, client, "write: 0x%08x : 0x%04x\n", addr, val);
+ ret = s5k4ecgx_i2c_write(client, REG_CMDWR_ADDRH, high);
+ if (!ret)
+ ret = s5k4ecgx_i2c_write(client, REG_CMDWR_ADDRL, low);
+ if (!ret)
+ ret = s5k4ecgx_i2c_write(client, REG_CMDBUF0_ADDR, val);
+
+ return ret;
+}
+
+static int s5k4ecgx_read(struct i2c_client *client, u32 addr, u16 *val)
+{
+ u16 high = addr >> 16, low = addr & 0xffff;
+ int ret;
+
+ ret = s5k4ecgx_i2c_write(client, REG_CMDRD_ADDRH, high);
+ if (!ret)
+ ret = s5k4ecgx_i2c_write(client, REG_CMDRD_ADDRL, low);
+ if (!ret)
+ ret = s5k4ecgx_i2c_read(client, REG_CMDBUF0_ADDR, val);
+ if (!ret)
+ dev_err(&client->dev, "Failed to execute read command\n");
+
+ return ret;
+}
+
+static int s5k4ecgx_read_fw_ver(struct v4l2_subdev *sd)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u16 hw_rev, fw_ver = 0;
+ int ret;
+
+ ret = s5k4ecgx_read(client, REG_FW_VERSION, &fw_ver);
+ if (ret < 0 || fw_ver != S5K4ECGX_FW_VERSION) {
+ v4l2_err(sd, "FW version check failed!\n");
+ return -ENODEV;
+ }
+
+ ret = s5k4ecgx_read(client, REG_FW_REVISION, &hw_rev);
+ if (ret < 0)
+ return ret;
+
+ v4l2_info(sd, "chip found FW ver: 0x%x, HW rev: 0x%x\n",
+ fw_ver, hw_rev);
+ 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;
+ /*
+ * FIXME: 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;
+
+ ret = s5k4ecgx_i2c_write(client, 0x1030, 0x0000);
+ if (ret)
+ return ret;
+ /* Halt ARM CPU */
+ return s5k4ecgx_i2c_write(client, 0x0014, 0x0001);
+}
+
+#define FW_CRC_SIZE 4
+#define FW_HEAD 6
+/* Register address, value are 4, 2 bytes */
+#define FW_RECORD_SIZE 6
+/*
+ * Firmware has the following format:
+ * <total number of records (4-bytes + 2-bytes padding) N >, < record 0 >,
+ * < record N - 1 >, < CRC32-CCITT (4-bytes) >, CRC32(4 bytes)
+ * where "record" is a 4-byte register address followed by 2-byte
+ * register value (little endian)
+ */
+static int s5k4ecgx_load_firmware(struct v4l2_subdev *sd)
+{
+ const struct firmware *fw;
+ int err, i, regs_num;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u16 val;
+ u32 addr, crc, crc_file, addr_inc = 0;
+
+ err = request_firmware(&fw, S5K4ECGX_FIRMWARE, sd->v4l2_dev->dev);
+ if (err) {
+ v4l2_err(sd, "Failed to read firmware %s\n", S5K4ECGX_FIRMWARE);
+ return err;
+ }
+ regs_num = *(u32 *)(fw->data);
+ v4l2_dbg(3, debug, sd, "FW: %s size %d register sets %d\n",
+ S5K4ECGX_FIRMWARE, fw->size, regs_num);
+ regs_num++; /* Add header */
+ if (fw->size != regs_num * FW_RECORD_SIZE + FW_CRC_SIZE) {
+ err = -EINVAL;
+ goto fw_out;
+ }
+ crc_file = *(u32 *)(fw->data + regs_num * FW_RECORD_SIZE);
+ crc = crc32_le(~0, fw->data, regs_num * FW_RECORD_SIZE);
+ if (crc != crc_file) {
+ v4l2_err(sd, "FW: invalid crc (%#x:%#x)\n", crc, crc_file);
+ err = -EINVAL;
+ goto fw_out;
+ }
+ for (i = 1; i < regs_num; i++) {
+ addr = le32_to_cpu(*(u32 *)(fw->data + i * FW_RECORD_SIZE));
+ val = le16_to_cpu(*(u16 *)(fw->data + i * FW_RECORD_SIZE + 4));
+ if (addr - addr_inc != 2)
+ err = s5k4ecgx_write(client, addr, val);
+ else
+ err = s5k4ecgx_i2c_write(client, REG_CMDBUF0_ADDR, val);
+ if (err)
+ break;
+ addr_inc = addr;
+ }
+fw_out:
+ release_firmware(fw);
+
+ return err;
+}
+
+/* Set preview and capture input window */
+static int s5k4ecgx_set_input_window(struct i2c_client *c,
+ const struct v4l2_rect *r)
+{
+ int ret;
+
+ ret = s5k4ecgx_write(c, REG_G_PREV_IN_WIDTH, r->width);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_PREV_IN_HEIGHT, r->height);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_PREV_IN_XOFFS, r->left);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_PREV_IN_YOFFS, r->top);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAP_IN_WIDTH, r->width);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAP_IN_HEIGHT, r->height);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAP_IN_XOFFS, r->left);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAP_IN_YOFFS, r->top);
+
+ return ret;
+}
+
+/* Set preview and capture zoom input window */
+static int s5k4ecgx_set_zoom_window(struct i2c_client *c,
+ const struct v4l2_rect *r)
+{
+ int ret;
+
+ ret = s5k4ecgx_write(c, REG_G_PREVZOOM_IN_WIDTH, r->width);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_PREVZOOM_IN_HEIGHT, r->height);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_PREVZOOM_IN_XOFFS, r->left);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_PREVZOOM_IN_YOFFS, r->top);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAPZOOM_IN_WIDTH, r->width);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAPZOOM_IN_HEIGHT, r->height);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAPZOOM_IN_XOFFS, r->left);
+ if (!ret)
+ ret = s5k4ecgx_write(c, REG_G_CAPZOOM_IN_YOFFS, r->top);
+
+ return ret;
+}
+
+static int s5k4ecgx_set_output_framefmt(struct s5k4ecgx *priv)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
+ int ret;
+
+ ret = s5k4ecgx_write(client, REG_P_OUT_WIDTH(0),
+ priv->curr_frmsize->size.width);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_OUT_HEIGHT(0),
+ priv->curr_frmsize->size.height);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_FMT(0),
+ priv->curr_pixfmt->reg_p_format);
+ return ret;
+}
+
+static int s5k4ecgx_init_sensor(struct v4l2_subdev *sd)
+{
+ int ret;
+
+ ret = s5k4ecgx_set_ahb_address(sd);
+ /* The delay is from manufacturer's settings */
+ msleep(100);
+
+ if (!ret)
+ ret = s5k4ecgx_load_firmware(sd);
+ if (ret)
+ v4l2_err(sd, "Failed to write initial settings\n");
+
+ return ret;
+}
+
+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_prev_sizes);
+ const struct s5k4ecgx_frmsize *fsize = &s5k4ecgx_prev_sizes[0],
+ *match = NULL;
+
+ while (i--) {
+ int err = abs(fsize->size.width - mf->width)
+ + abs(fsize->size.height - mf->height);
+ if (err < min_err) {
+ min_err = err;
+ match = fsize;
+ }
+ fsize++;
+ }
+ if (match) {
+ mf->width = match->size.width;
+ mf->height = match->size.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_frmsize->size.width;
+ mf->height = priv->curr_frmsize->size.height;
+ mf->code = priv->curr_pixfmt->code;
+ mf->colorspace = priv->curr_pixfmt->colorspace;
+ mf->field = V4L2_FIELD_NONE;
+ mutex_unlock(&priv->lock);
+
+ return 0;
+}
+
+static const struct s5k4ecgx_pixfmt *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 *fsize = NULL;
+ const struct s5k4ecgx_pixfmt *pf;
+ struct v4l2_mbus_framefmt *mf;
+ int ret = 0;
+
+ pf = s5k4ecgx_try_fmt(sd, &fmt->format);
+ s5k4ecgx_try_frame_size(&fmt->format, &fsize);
+ 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) {
+ priv->curr_frmsize = fsize;
+ priv->curr_pixfmt = pf;
+ priv->set_params = 1;
+ } 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);
+ unsigned int i;
+ 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:
+ /* TODO: Revisit, is this setting for all presets ? */
+ for (i = 0; i < 4 && !err; i++)
+ err = s5k4ecgx_write(client, REG_USER_SHARPNESS(i),
+ ctrl->val * SHARPNESS_DIV);
+ 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_prev_sizes[0].size.width;
+ mf->height = s5k4ecgx_prev_sizes[0].size.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 < 0)
+ return ret;
+ /* Time to stabilize sensor */
+ msleep(100);
+ ret = s5k4ecgx_init_sensor(sd);
+ if (ret < 0)
+ __s5k4ecgx_power_off(priv);
+ else
+ priv->set_params = 1;
+ } 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 s5k4ecgx *priv, int on)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
+ const struct v4l2_rect *crop_rect = &priv->curr_frmsize->input_window;
+ int ret = 0;
+
+ /* TODO: Add s_stream(0) handling */
+
+ if (!on || !priv->set_params)
+ return 0;
+
+ ret = s5k4ecgx_set_input_window(client, crop_rect);
+ if (!ret)
+ ret = s5k4ecgx_set_zoom_window(client, crop_rect);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_G_INPUTS_CHANGE_REQ, 1);
+ if (!ret)
+ ret = s5k4ecgx_write(client, 0x70000a1e, 0x28);
+ if (!ret)
+ ret = s5k4ecgx_write(client, 0x70000ad4, 0x3c);
+ if (!ret)
+ ret = s5k4ecgx_set_output_framefmt(priv);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_PVI_MASK(0), 0x52);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_FR_TIME_TYPE(0),
+ FR_TIME_DYNAMIC);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_FR_TIME_Q_TYPE(0),
+ FR_TIME_Q_BEST_FRRATE);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_MIN_FR_TIME(0),
+ US_TO_FR_TIME(33300));
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_MAX_FR_TIME(0),
+ US_TO_FR_TIME(66600));
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_PREV_MIRROR(0), 0);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_P_CAP_MIRROR(0), 0);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_G_ACTIVE_PREV_CFG, 0);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_G_PREV_OPEN_AFTER_CH, 1);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_G_NEW_CFG_SYNC, 1);
+ if (!ret)
+ ret = s5k4ecgx_write(client, REG_G_PREV_CFG_CHG, 1);
+ if (!ret)
+ priv->set_params = 0;
+
+ return ret;
+}
+
+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 == !on) {
+ ret = __s5k4ecgx_s_stream(priv, on);
+ if (!ret)
+ priv->streaming = on & 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;
+};
+
+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 = devm_kzalloc(&client->dev, sizeof(struct s5k4ecgx), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_init(&priv->lock);
+ 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 user space 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)
+ return ret;
+
+ ret = s5k4ecgx_config_gpios(priv, pdata);
+ if (ret) {
+ dev_err(&client->dev, "Failed to set gpios\n");
+ goto out_err1;
+ }
+ for (i = 0; i < S5K4ECGX_NUM_SUPPLIES; i++)
+ priv->supplies[i].supply = s5k4ecgx_supply_names[i];
+
+ ret = devm_regulator_bulk_get(&client->dev, S5K4ECGX_NUM_SUPPLIES,
+ priv->supplies);
+ if (ret) {
+ dev_err(&client->dev, "Failed to get regulators\n");
+ goto out_err2;
+ }
+ ret = s5k4ecgx_init_v4l2_ctrls(priv);
+ if (ret)
+ goto out_err2;
+
+ priv->curr_pixfmt = &s5k4ecgx_formats[0];
+ priv->curr_frmsize = &s5k4ecgx_prev_sizes[0];
+
+ return 0;
+
+out_err2:
+ s5k4ecgx_free_gpios(priv);
+out_err1:
+ media_entity_cleanup(&priv->sd.entity);
+
+ 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);
+
+ 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");
+MODULE_FIRMWARE(S5K4ECGX_FIRMWARE);
diff --git a/include/media/s5k4ecgx.h b/include/media/s5k4ecgx.h
new file mode 100644
index 0000000..90c1be7
--- /dev/null
+++ b/include/media/s5k4ecgx.h
@@ -0,0 +1,37 @@
+/*
+ * S5K4ECGX image sensor header file
+ *
+ * Copyright (C) 2012, Linaro
+ * Copyright (C) 2012, 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
+ */
+
+struct s5k4ecgx_platform_data {
+ struct s5k4ecgx_gpio gpio_reset;
+ struct s5k4ecgx_gpio gpio_stby;
+};
+
+#endif /* S5K4ECGX_H */
--
1.7.9.5
--
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