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.lee@linaro.org --- drivers/media/video/Kconfig | 8 + drivers/media/video/Makefile | 1 + drivers/media/video/s5k4ecgx.c | 941 ++++++++++++++++++++++++++++++++++++++++ include/media/s5k4ecgx.h | 37 ++ 4 files changed, 987 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..d405cb1 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..4e57738 --- /dev/null +++ b/drivers/media/video/s5k4ecgx.c @@ -0,0 +1,941 @@ +/* + * 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@linaro.org + * Copyright (C) 2012, Insignal Co,. Ltd, Homin Lee suapapa@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/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 <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" + +#define S5K4ECGX_FIRMWARE "s5k4ecgx.fw" +/* Firmware parsing token */ +#define FW_START_TOKEN '{' +#define FW_END_TOKEN '}' + +/* 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_prev, + s5k4ecgx_352_prev, + s5k4ecgx_640_prev, + s5k4ecgx_720_prev, +}; + +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[] = { + /* + * Usually 2.8v is used for analog power(vdda) + * and digital IO(vddio, vddd_core) + */ + "vdda", + "vddio", + "vddcore", + "vddreg", /* vddreg is 1.8v for regulator input */ +}; + +#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]; +}; + +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) +{ + int ret; + 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; + 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_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; + + 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, hw_rev; + 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_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; + + /* FIXME: no information availalbe 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; +} + +/** + * parse_line() - parse a line from a s5k4ecgx fimware file + * + * This function uses tokens to separate the patterns. + * The form of the pattern should be as follows: + * - use only C-sytle comments + * - use one "token address, value token" in a line + * ex) {0xd002020, 0x5a5a} + * - address should be a 32bit hex number + * - value should be a 16bit hex number + */ +static int parse_line(struct v4l2_subdev *sd, const struct firmware *fw, + int offset, int *found, struct regval_list *reg) +{ + int ret; + u8 *p1 = (u8 *)(fw->data + offset); + u8 *p2 = p1; + + *found = 0; + /* Skip leading white-space characters */ + while (isspace(*p2)) + p2++; + /* Skip empty last lines */ + if (p2 == fw->data + fw->size) + return p2 - p1; + + while (*p2 != '\n') { + /* Search for start token */ + if (*p2 == FW_START_TOKEN) { + p2++; + ret = sscanf(p2, "%x,%hx", &reg->addr, &reg->val); + if (ret != 2) + return -EINVAL; + /* Fast forward as searching for end token */ + while (*p2 != FW_END_TOKEN && *p2 != '\n') { + p2++; + if (p2 == fw->data + fw->size) + return -EINVAL; + } + if (*p2 != FW_END_TOKEN) + return -EINVAL; + *found = 1; + } + /* In case of missing '\n' in the last line */ + if (p2 == fw->data + fw->size) { + v4l2_dbg(1, debug, sd, "Firmware: missing newline\n"); + break; + } + p2++; + } + + return p2 - p1; +} + +static int parse_firmware(struct v4l2_subdev *sd, const struct firmware *fw) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + int count = 0, found, read_bytes, ret, total_read_bytes; + struct regval_list reg; + u32 addr_inc = 0; + + for (total_read_bytes = 0; total_read_bytes < fw->size;) { + read_bytes = parse_line(sd, fw, total_read_bytes, &found, &reg); + if (read_bytes < 0) { + v4l2_err(sd, "Firmware: format error\n"); + return -EINVAL; + } + total_read_bytes += read_bytes; + if (found) { + v4l2_dbg(4, debug, sd, "reg: add 0x%x val 0x%04hx\n", + reg.addr, reg.val); + if (reg.addr - addr_inc != 2) + ret = s5k4ecgx_write(client, reg.addr, reg.val); + else + ret = s5k4ecgx_i2c_write(client, + REG_CMDBUF0_ADDR, reg.val); + if (ret) + return -EIO; + addr_inc = reg.addr; + count++; /* Save number of registers written */ + } + } + v4l2_dbg(1, debug, client, "Wrote total %d registers\n", count); + + return 0; +} + +static int s5k4ecgx_load_firmware(struct v4l2_subdev *sd) +{ + const struct firmware *fw; + int err; + + err = request_firmware(&fw, S5K4ECGX_FIRMWARE, sd->v4l2_dev->dev); + if (err) { + v4l2_err(sd, "Failed to read firmware %s\n", S5K4ECGX_FIRMWARE); + return -EINVAL; + } + err = parse_firmware(sd, fw); + if (err) + v4l2_err(sd, "Failed to parse firmware\n"); + release_firmware(fw); + + return err; +} + +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); + + ret |= s5k4ecgx_load_firmware(sd); + + 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; + + 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(100); + 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]); + err |= s5k4ecgx_write_array(sd, s5k4ecgx_com1_prev); + err |= s5k4ecgx_write_array(sd, s5k4ecgx_com2_prev); + } + + return err ? -EIO : 0; +} + +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; +}; + +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 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) + 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; + + 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@linaro.org"); +MODULE_AUTHOR("Seok-Young Jang quartz.jang@samsung.com"); +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..fbed5cb --- /dev/null +++ b/include/media/s5k4ecgx.h @@ -0,0 +1,37 @@ +/* + * 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 + */ + +struct s5k4ecgx_platform_data { + struct s5k4ecgx_gpio gpio_reset; + struct s5k4ecgx_gpio gpio_stby; +}; + +#endif /* S5K4ECGX_H */