/*
* Driver for Samsung S5K4ECGX 1/4" 5Mp CMOS Image Sensor SoC
* with an Embedded Image Signal Processor.
*
* 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 and 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 <asm/unaligned.h>
#include <media/media-entity.h>
#include <media/i2c/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_ENABLE_PREV 0x7000023e
#define REG_G_ENABLE_PREV_CHG 0x70000240
#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 {
u32 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[] = {
{ MEDIA_BUS_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, vdddcore)
*/
"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(*((__be16 *)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)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
/* Set APB peripherals start address */
ret = s5k4ecgx_i2c_write(client, AHB_MSB_ADDR_PTR, GEN_REG_OFFSH);
if (ret < 0)
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 < 0)
return ret;
ret = s5k4ecgx_i2c_write(client, 0x1030, 0x0000);
if (ret < 0)
return ret;
/* Halt ARM CPU */
return s5k4ecgx_i2c_write(client, 0x0014, 0x0001);
}
#define FW_CRC_SIZE 4
/* Register address, value are 4, 2 bytes */
#define FW_RECORD_SIZE 6
/*
* The firmware has following format:
* < total number of records (4 bytes + 2 bytes padding) N >,
* < record 0 >, ..., < record N - 1 >, < CRC32-CCITT (4-bytes) >,
* where "record" is a 4-byte register address followed by 2-byte
* register value (little endian).
* The firmware generator can be found in following git repository:
* git://git.linaro.org/people/sangwook/fimc-v4l2-app.git
*/
static int s5k4ecgx_load_firmware(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
const struct firmware *fw;
const u8 *ptr;
int err, i, regs_num;
u32 addr, crc, crc_file, addr_inc = 0;
u16 val;
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 = get_unaligned_le32(fw->data);
v4l2_dbg(3, debug, sd, "FW: %s size %zu 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 = get_unaligned_le32(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;
}
ptr = fw->data + FW_RECORD_SIZE;
for (i = 1; i < regs_num; i++) {
addr = get_unaligned_le32(ptr);
ptr += sizeof(u32);
val = get_unaligned_le16(ptr);
ptr += sizeof(u16);
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_pad_config *cfg,
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_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct s5k4ecgx *priv = to_s5k4ecgx(sd);
struct v4l2_mbus_framefmt *mf;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
if (cfg) {
mf = v4l2_subdev_get_try_format(sd, cfg, 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_pad_config *cfg,
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;
fmt->format.field = V4L2_FIELD_NONE;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
if (cfg) {
mf = v4l2_subdev_get_try_format(sd, cfg, 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(sd, fh->pad, 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 ret;
}
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_params(struct s5k4ecgx *priv)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
const struct v4l2_rect *crop_rect = &priv->curr_frmsize->input_window;
int ret;
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);
return ret;
}
static int __s5k4ecgx_s_stream(struct s5k4ecgx *priv, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
int ret;
if (on && priv->set_params) {
ret = __s5k4ecgx_s_params(priv);
if (ret < 0)
return ret;
priv->set_params = 0;
}
/*
* This enables/disables preview stream only. Capture requests
* are not supported yet.
*/
ret = s5k4ecgx_write(client, REG_G_ENABLE_PREV, on);
if (ret < 0)
return ret;
return s5k4ecgx_write(client, REG_G_ENABLE_PREV_CHG, 1);
}
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 (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)
{
struct s5k4ecgx_platform_data *pdata = client->dev.platform_data;
struct v4l2_subdev *sd;
struct s5k4ecgx *priv;
int ret, i;
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.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &priv->pad);
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);
s5k4ecgx_free_gpios(priv);
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 = {
.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);