/*
* Driver for M-5MOLS 8M Pixel camera sensor with ISP
*
* Copyright (C) 2011 Samsung Electronics Co., Ltd.
* Author: HeungJun Kim <riverful.kim@samsung.com>
*
* Copyright (C) 2009 Samsung Electronics Co., Ltd.
* Author: Dongsoo Nathaniel Kim <dongsoo45.kim@samsung.com>
*
* 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/i2c.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include <media/m5mols.h>
#include "m5mols.h"
#include "m5mols_reg.h"
int m5mols_debug;
module_param(m5mols_debug, int, 0644);
#define MODULE_NAME "M5MOLS"
#define M5MOLS_I2C_CHECK_RETRY 500
/* The regulator consumer names for external voltage regulators */
static struct regulator_bulk_data supplies[] = {
{
.supply = "core", /* ARM core power, 1.2V */
}, {
.supply = "dig_18", /* digital power 1, 1.8V */
}, {
.supply = "d_sensor", /* sensor power 1, 1.8V */
}, {
.supply = "dig_28", /* digital power 2, 2.8V */
}, {
.supply = "a_sensor", /* analog power */
}, {
.supply = "dig_12", /* digital power 3, 1.2V */
},
};
static struct v4l2_mbus_framefmt m5mols_default_ffmt[M5MOLS_RESTYPE_MAX] = {
[M5MOLS_RESTYPE_MONITOR] = {
.width = 1920,
.height = 1080,
.code = V4L2_MBUS_FMT_VYUY8_2X8,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_JPEG,
},
[M5MOLS_RESTYPE_CAPTURE] = {
.width = 1920,
.height = 1080,
.code = V4L2_MBUS_FMT_JPEG_1X8,
.field = V4L2_FIELD_NONE,
.colorspace = V4L2_COLORSPACE_JPEG,
},
};
#define SIZE_DEFAULT_FFMT ARRAY_SIZE(m5mols_default_ffmt)
static const struct m5mols_resolution m5mols_reg_res[] = {
{ 0x01, M5MOLS_RESTYPE_MONITOR, 128, 96 }, /* SUB-QCIF */
{ 0x03, M5MOLS_RESTYPE_MONITOR, 160, 120 }, /* QQVGA */
{ 0x05, M5MOLS_RESTYPE_MONITOR, 176, 144 }, /* QCIF */
{ 0x06, M5MOLS_RESTYPE_MONITOR, 176, 176 },
{ 0x08, M5MOLS_RESTYPE_MONITOR, 240, 320 }, /* QVGA */
{ 0x09, M5MOLS_RESTYPE_MONITOR, 320, 240 }, /* QVGA */
{ 0x0c, M5MOLS_RESTYPE_MONITOR, 240, 400 }, /* WQVGA */
{ 0x0d, M5MOLS_RESTYPE_MONITOR, 400, 240 }, /* WQVGA */
{ 0x0e, M5MOLS_RESTYPE_MONITOR, 352, 288 }, /* CIF */
{ 0x13, M5MOLS_RESTYPE_MONITOR, 480, 360 },
{ 0x15, M5MOLS_RESTYPE_MONITOR, 640, 360 }, /* qHD */
{ 0x17, M5MOLS_RESTYPE_MONITOR, 640, 480 }, /* VGA */
{ 0x18, M5MOLS_RESTYPE_MONITOR, 720, 480 },
{ 0x1a, M5MOLS_RESTYPE_MONITOR, 800, 480 }, /* WVGA */
{ 0x1f, M5MOLS_RESTYPE_MONITOR, 800, 600 }, /* SVGA */
{ 0x21, M5MOLS_RESTYPE_MONITOR, 1280, 720 }, /* HD */
{ 0x25, M5MOLS_RESTYPE_MONITOR, 1920, 1080 }, /* 1080p */
{ 0x29, M5MOLS_RESTYPE_MONITOR, 3264, 2448 }, /* 2.63fps 8M */
{ 0x39, M5MOLS_RESTYPE_MONITOR, 800, 602 }, /* AHS_MON debug */
{ 0x02, M5MOLS_RESTYPE_CAPTURE, 320, 240 }, /* QVGA */
{ 0x04, M5MOLS_RESTYPE_CAPTURE, 400, 240 }, /* WQVGA */
{ 0x07, M5MOLS_RESTYPE_CAPTURE, 480, 360 },
{ 0x08, M5MOLS_RESTYPE_CAPTURE, 640, 360 }, /* qHD */
{ 0x09, M5MOLS_RESTYPE_CAPTURE, 640, 480 }, /* VGA */
{ 0x0a, M5MOLS_RESTYPE_CAPTURE, 800, 480 }, /* WVGA */
{ 0x10, M5MOLS_RESTYPE_CAPTURE, 1280, 720 }, /* HD */
{ 0x14, M5MOLS_RESTYPE_CAPTURE, 1280, 960 }, /* 1M */
{ 0x17, M5MOLS_RESTYPE_CAPTURE, 1600, 1200 }, /* 2M */
{ 0x19, M5MOLS_RESTYPE_CAPTURE, 1920, 1080 }, /* Full-HD */
{ 0x1a, M5MOLS_RESTYPE_CAPTURE, 2048, 1152 }, /* 3Mega */
{ 0x1b, M5MOLS_RESTYPE_CAPTURE, 2048, 1536 },
{ 0x1c, M5MOLS_RESTYPE_CAPTURE, 2560, 1440 }, /* 4Mega */
{ 0x1d, M5MOLS_RESTYPE_CAPTURE, 2560, 1536 },
{ 0x1f, M5MOLS_RESTYPE_CAPTURE, 2560, 1920 }, /* 5Mega */
{ 0x21, M5MOLS_RESTYPE_CAPTURE, 3264, 1836 }, /* 6Mega */
{ 0x22, M5MOLS_RESTYPE_CAPTURE, 3264, 1960 },
{ 0x25, M5MOLS_RESTYPE_CAPTURE, 3264, 2448 }, /* 8Mega */
};
/**
* m5mols_swap_byte - an byte array to integer conversion function
* @size: size in bytes of I2C packet defined in the M-5MOLS datasheet
*
* Convert I2C data byte array with performing any required byte
* reordering to assure proper values for each data type, regardless
* of the architecture endianness.
*/
static u32 m5mols_swap_byte(u8 *data, u8 length)
{
if (length == 1)
return *data;
else if (length == 2)
return be16_to_cpu(*((u16 *)data));
else
return be32_to_cpu(*((u32 *)data));
}
/**
* m5mols_read - I2C read function
* @reg: combination of size, category and command for the I2C packet
* @size: desired size of I2C packet
* @val: read value
*
* Returns 0 on success, or else negative errno.
*/
static int m5mols_read(struct v4l2_subdev *sd, u32 size, u32 reg, u32 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct m5mols_info *info = to_m5mols(sd);
u8 rbuf[M5MOLS_I2C_MAX_SIZE + 1];
u8 category = I2C_CATEGORY(reg);
u8 cmd = I2C_COMMAND(reg);
struct i2c_msg msg[2];
u8 wbuf[5];
int ret;
if (!client->adapter)
return -ENODEV;
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].len = 5;
msg[0].buf = wbuf;
wbuf[0] = 5;
wbuf[1] = M5MOLS_BYTE_READ;
wbuf[2] = category;
wbuf[3] = cmd;
wbuf[4] = size;
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = size + 1;
msg[1].buf = rbuf;
/* minimum stabilization time */
usleep_range(200, 200);
ret = i2c_transfer(client->adapter, msg, 2);
if (ret == 2) {
*val = m5mols_swap_byte(&rbuf[1], size);
return 0;
}
if (info->isp_ready)
v4l2_err(sd, "read failed: size:%d cat:%02x cmd:%02x. %d\n",
size, category, cmd, ret);
return ret < 0 ? ret : -EIO;
}
int m5mols_read_u8(struct v4l2_subdev *sd, u32 reg, u8 *val)
{
u32 val_32;
int ret;
if (I2C_SIZE(reg) != 1) {
v4l2_err(sd, "Wrong data size\n");
return -EINVAL;
}
ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32);
if (ret)
return ret;
*val = (u8)val_32;
return ret;
}
int m5mols_read_u16(struct v4l2_subdev *sd, u32 reg, u16 *val)
{
u32 val_32;
int ret;
if (I2C_SIZE(reg) != 2) {
v4l2_err(sd, "Wrong data size\n");
return -EINVAL;
}
ret = m5mols_read(sd, I2C_SIZE(reg), reg, &val_32);
if (ret)
return ret;
*val = (u16)val_32;
return ret;
}
int m5mols_read_u32(struct v4l2_subdev *sd, u32 reg, u32 *val)
{
if (I2C_SIZE(reg) != 4) {
v4l2_err(sd, "Wrong data size\n");
return -EINVAL;
}
return m5mols_read(sd, I2C_SIZE(reg), reg, val);
}
/**
* m5mols_write - I2C command write function
* @reg: combination of size, category and command for the I2C packet
* @val: value to write
*
* Returns 0 on success, or else negative errno.
*/
int m5mols_write(struct v4l2_subdev *sd, u32 reg, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct m5mols_info *info = to_m5mols(sd);
u8 wbuf[M5MOLS_I2C_MAX_SIZE + 4];
u8 category = I2C_CATEGORY(reg);
u8 cmd = I2C_COMMAND(reg);
u8 size = I2C_SIZE(reg);
u32 *buf = (u32 *)&wbuf[4];
struct i2c_msg msg[1];
int ret;
if (!client->adapter)
return -ENODEV;
if (size != 1 && size != 2 && size != 4) {
v4l2_err(sd, "Wrong data size\n");
return -EINVAL;
}
msg->addr = client->addr;
msg->flags = 0;
msg->len = (u16)size + 4;
msg->buf = wbuf;
wbuf[0] = size + 4;
wbuf[1] = M5MOLS_BYTE_WRITE;
wbuf[2] = category;
wbuf[3] = cmd;
*buf = m5mols_swap_byte((u8 *)&val, size);
usleep_range(200, 200);
ret = i2c_transfer(client->adapter, msg, 1);
if (ret == 1)
return 0;
if (info->isp_ready)
v4l2_err(sd, "write failed: cat:%02x cmd:%02x ret:%d\n",
category, cmd, ret);
return ret < 0 ? ret : -EIO;
}
/**
* m5mols_busy_wait - Busy waiting with I2C register polling
* @reg: the I2C_REG() address of an 8-bit status register to check
* @value: expected status register value
* @mask: bit mask for the read status register value
* @timeout: timeout in miliseconds, or -1 for default timeout
*
* The @reg register value is ORed with @mask before comparing with @value.
*
* Return: 0 if the requested condition became true within less than
* @timeout ms, or else negative errno.
*/
int m5mols_busy_wait(struct v4l2_subdev *sd, u32 reg, u32 value, u32 mask,
int timeout)
{
int ms = timeout < 0 ? M5MOLS_BUSY_WAIT_DEF_TIMEOUT : timeout;
unsigned long end = jiffies + msecs_to_jiffies(ms);
u8 status;
do {
int ret = m5mols_read_u8(sd, reg, &status);
if (ret < 0 && !(mask & M5MOLS_I2C_RDY_WAIT_FL))
return ret;
if (!ret && (status & mask & 0xff) == (value & 0xff))
return 0;
usleep_range(100, 250);
} while (ms > 0 && time_is_after_jiffies(end));
return -EBUSY;
}
/**
* m5mols_enable_interrupt - Clear interrupt pending bits and unmask interrupts
*
* Before writing desired interrupt value the INT_FACTOR register should
* be read to clear pending interrupts.
*/
int m5mols_enable_interrupt(struct v4l2_subdev *sd, u8 reg)
{
struct m5mols_info *info = to_m5mols(sd);
u8 mask = is_available_af(info) ? REG_INT_AF : 0;
u8 dummy;
int ret;
ret = m5mols_read_u8(sd, SYSTEM_INT_FACTOR, &dummy);
if (!ret)
ret = m5mols_write(sd, SYSTEM_INT_ENABLE, reg & ~mask);
return ret;
}
int m5mols_wait_interrupt(struct v4l2_subdev *sd, u8 irq_mask, u32 timeout)
{
struct m5mols_info *info = to_m5mols(sd);
int ret = wait_event_interruptible_timeout(info->irq_waitq,
atomic_add_unless(&info->irq_done, -1, 0),
msecs_to_jiffies(timeout));
if (ret <= 0)
return ret ? ret : -ETIMEDOUT;
return m5mols_busy_wait(sd, SYSTEM_INT_FACTOR, irq_mask,
M5MOLS_I2C_RDY_WAIT_FL | irq_mask, -1);
}
/**
* m5mols_reg_mode - Write the mode and check busy status
*
* It always accompanies a little delay changing the M-5MOLS mode, so it is
* needed checking current busy status to guarantee right mode.
*/
static int m5mols_reg_mode(struct v4l2_subdev *sd, u8 mode)
{
int ret = m5mols_write(sd, SYSTEM_SYSMODE, mode);
if (ret < 0)
return ret;
return m5mols_busy_wait(sd, SYSTEM_SYSMODE, mode, 0xff,
M5MOLS_MODE_CHANGE_TIMEOUT);
}
/**
* m5mols_set_mode - set the M-5MOLS controller mode
* @mode: the required operation mode
*
* The commands of M-5MOLS are grouped into specific modes. Each functionality
* can be guaranteed only when the sensor is operating in mode which a command
* belongs to.
*/
int m5mols_set_mode(struct m5mols_info *info, u8 mode)
{
struct v4l2_subdev *sd = &info->sd;
int ret = -EINVAL;
u8 reg;
if (mode < REG_PARAMETER || mode > REG_CAPTURE)
return ret;
ret = m5mols_read_u8(sd, SYSTEM_SYSMODE, ®);
if (ret || reg == mode)
return ret;
switch (reg) {
case REG_PARAMETER:
ret = m5mols_reg_mode(sd, REG_MONITOR);
if (mode == REG_MONITOR)
break;
if (!ret)
ret = m5mols_reg_mode(sd, REG_CAPTURE);
break;
case REG_MONITOR:
if (mode == REG_PARAMETER) {
ret = m5mols_reg_mode(sd, REG_PARAMETER);
break;
}
ret = m5mols_reg_mode(sd, REG_CAPTURE);
break;
case REG_CAPTURE:
ret = m5mols_reg_mode(sd, REG_MONITOR);
if (mode == REG_MONITOR)
break;
if (!ret)
ret = m5mols_reg_mode(sd, REG_PARAMETER);
break;
default:
v4l2_warn(sd, "Wrong mode: %d\n", mode);
}
if (!ret)
info->mode = mode;
return ret;
}
/**
* m5mols_get_version - retrieve full revisions information of M-5MOLS
*
* The version information includes revisions of hardware and firmware,
* AutoFocus alghorithm version and the version string.
*/
static int m5mols_get_version(struct v4l2_subdev *sd)
{
struct m5mols_info *info = to_m5mols(sd);
struct m5mols_version *ver = &info->ver;
u8 *str = ver->str;
int i;
int ret;
ret = m5mols_read_u8(sd, SYSTEM_VER_CUSTOMER, &ver->customer);
if (!ret)
ret = m5mols_read_u8(sd, SYSTEM_VER_PROJECT, &ver->project);
if (!ret)
ret = m5mols_read_u16(sd, SYSTEM_VER_FIRMWARE, &ver->fw);
if (!ret)
ret = m5mols_read_u16(sd, SYSTEM_VER_HARDWARE, &ver->hw);
if (!ret)
ret = m5mols_read_u16(sd, SYSTEM_VER_PARAMETER, &ver->param);
if (!ret)
ret = m5mols_read_u16(sd, SYSTEM_VER_AWB, &ver->awb);
if (!ret)
ret = m5mols_read_u8(sd, AF_VERSION, &ver->af);
if (ret)
return ret;
for (i = 0; i < VERSION_STRING_SIZE; i++) {
ret = m5mols_read_u8(sd, SYSTEM_VER_STRING, &str[i]);
if (ret)
return ret;
}
ver->fw = be16_to_cpu(ver->fw);
ver->hw = be16_to_cpu(ver->hw);
ver->param = be16_to_cpu(ver->param);
ver->awb = be16_to_cpu(ver->awb);
v4l2_info(sd, "Manufacturer\t[%s]\n",
is_manufacturer(info, REG_SAMSUNG_ELECTRO) ?
"Samsung Electro-Machanics" :
is_manufacturer(info, REG_SAMSUNG_OPTICS) ?
"Samsung Fiber-Optics" :
is_manufacturer(info, REG_SAMSUNG_TECHWIN) ?
"Samsung Techwin" : "None");
v4l2_info(sd, "Customer/Project\t[0x%02x/0x%02x]\n",
info->ver.customer, info->ver.project);
if (!is_available_af(info))
v4l2_info(sd, "No support Auto Focus on this firmware\n");
return ret;
}
/**
* __find_restype - Lookup M-5MOLS resolution type according to pixel code
* @code: pixel code
*/
static enum m5mols_restype __find_restype(enum v4l2_mbus_pixelcode code)
{
enum m5mols_restype type = M5MOLS_RESTYPE_MONITOR;
do {
if (code == m5mols_default_ffmt[type].code)
return type;
} while (type++ != SIZE_DEFAULT_FFMT);
return 0;
}
/**
* __find_resolution - Lookup preset and type of M-5MOLS's resolution
* @mf: pixel format to find/negotiate the resolution preset for
* @type: M-5MOLS resolution type
* @resolution: M-5MOLS resolution preset register value
*
* Find nearest resolution matching resolution preset and adjust mf
* to supported values.
*/
static int __find_resolution(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf,
enum m5mols_restype *type,
u32 *resolution)
{
const struct m5mols_resolution *fsize = &m5mols_reg_res[0];
const struct m5mols_resolution *match = NULL;
enum m5mols_restype stype = __find_restype(mf->code);
int i = ARRAY_SIZE(m5mols_reg_res);
unsigned int min_err = ~0;
while (i--) {
int err;
if (stype == fsize->type) {
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;
*resolution = match->reg;
*type = stype;
return 0;
}
return -EINVAL;
}
static struct v4l2_mbus_framefmt *__find_format(struct m5mols_info *info,
struct v4l2_subdev_fh *fh,
enum v4l2_subdev_format_whence which,
enum m5mols_restype type)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return fh ? v4l2_subdev_get_try_format(fh, 0) : NULL;
return &info->ffmt[type];
}
static int m5mols_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
struct v4l2_subdev_format *fmt)
{
struct m5mols_info *info = to_m5mols(sd);
struct v4l2_mbus_framefmt *format;
format = __find_format(info, fh, fmt->which, info->res_type);
if (!format)
return -EINVAL;
fmt->format = *format;
return 0;
}
static int m5mols_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
struct v4l2_subdev_format *fmt)
{
struct m5mols_info *info = to_m5mols(sd);
struct v4l2_mbus_framefmt *format = &fmt->format;
struct v4l2_mbus_framefmt *sfmt;
enum m5mols_restype type;
u32 resolution = 0;
int ret;
ret = __find_resolution(sd, format, &type, &resolution);
if (ret < 0)
return ret;
sfmt = __find_format(info, fh, fmt->which, type);
if (!sfmt)
return 0;
format->code = m5mols_default_ffmt[type].code;
format->colorspace = V4L2_COLORSPACE_JPEG;
format->field = V4L2_FIELD_NONE;
if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
*sfmt = *format;
info->resolution = resolution;
info->res_type = type;
}
return 0;
}
static int m5mols_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_fh *fh,
struct v4l2_subdev_mbus_code_enum *code)
{
if (!code || code->index >= SIZE_DEFAULT_FFMT)
return -EINVAL;
code->code = m5mols_default_ffmt[code->index].code;
return 0;
}
static struct v4l2_subdev_pad_ops m5mols_pad_ops = {
.enum_mbus_code = m5mols_enum_mbus_code,
.get_fmt = m5mols_get_fmt,
.set_fmt = m5mols_set_fmt,
};
/**
* m5mols_restore_controls - Apply current control values to the registers
*
* m5mols_do_scenemode() handles all parameters for which there is yet no
* individual control. It should be replaced at some point by setting each
* control individually, in required register set up order.
*/
int m5mols_restore_controls(struct m5mols_info *info)
{
int ret;
if (info->ctrl_sync)
return 0;
ret = m5mols_do_scenemode(info, REG_SCENE_NORMAL);
if (ret)
return ret;
ret = v4l2_ctrl_handler_setup(&info->handle);
info->ctrl_sync = !ret;
return ret;
}
/**
* m5mols_start_monitor - Start the monitor mode
*
* Before applying the controls setup the resolution and frame rate
* in PARAMETER mode, and then switch over to MONITOR mode.
*/
static int m5mols_start_monitor(struct m5mols_info *info)
{
struct v4l2_subdev *sd = &info->sd;
int ret;
ret = m5mols_set_mode(info, REG_PARAMETER);
if (!ret)
ret = m5mols_write(sd, PARM_MON_SIZE, info->resolution);
if (!ret)
ret = m5mols_write(sd, PARM_MON_FPS, REG_FPS_30);
if (!ret)
ret = m5mols_set_mode(info, REG_MONITOR);
if (!ret)
ret = m5mols_restore_controls(info);
return ret;
}
static int m5mols_s_stream(struct v4l2_subdev *sd, int enable)
{
struct m5mols_info *info = to_m5mols(sd);
u32 code = info->ffmt[info->res_type].code;
if (enable) {
int ret = -EINVAL;
if (is_code(code, M5MOLS_RESTYPE_MONITOR))
ret = m5mols_start_monitor(info);
if (is_code(code, M5MOLS_RESTYPE_CAPTURE))
ret = m5mols_start_capture(info);
return ret;
}
return m5mols_set_mode(info, REG_PARAMETER);
}
static const struct v4l2_subdev_video_ops m5mols_video_ops = {
.s_stream = m5mols_s_stream,
};
static int m5mols_sensor_power(struct m5mols_info *info, bool enable)
{
struct v4l2_subdev *sd = &info->sd;
struct i2c_client *client = v4l2_get_subdevdata(sd);
const struct m5mols_platform_data *pdata = info->pdata;
int ret;
if (info->power == enable)
return 0;
if (enable) {
if (info->set_power) {
ret = info->set_power(&client->dev, 1);
if (ret)
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
if (ret) {
info->set_power(&client->dev, 0);
return ret;
}
gpio_set_value(pdata->gpio_reset, !pdata->reset_polarity);
info->power = 1;
return ret;
}
ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
if (ret)
return ret;
if (info->set_power)
info->set_power(&client->dev, 0);
gpio_set_value(pdata->gpio_reset, pdata->reset_polarity);
info->isp_ready = 0;
info->power = 0;
return ret;
}
/* m5mols_update_fw - optional firmware update routine */
int __attribute__ ((weak)) m5mols_update_fw(struct v4l2_subdev *sd,
int (*set_power)(struct m5mols_info *, bool))
{
return 0;
}
/**
* m5mols_fw_start - M-5MOLS internal ARM controller initialization
*
* Execute the M-5MOLS internal ARM controller initialization sequence.
* This function should be called after the supply voltage has been
* applied and before any requests to the device are made.
*/
static int m5mols_fw_start(struct v4l2_subdev *sd)
{
struct m5mols_info *info = to_m5mols(sd);
int ret;
atomic_set(&info->irq_done, 0);
/* Wait until I2C slave is initialized in Flash Writer mode */
ret = m5mols_busy_wait(sd, FLASH_CAM_START, REG_IN_FLASH_MODE,
M5MOLS_I2C_RDY_WAIT_FL | 0xff, -1);
if (!ret)
ret = m5mols_write(sd, FLASH_CAM_START, REG_START_ARM_BOOT);
if (!ret)
ret = m5mols_wait_interrupt(sd, REG_INT_MODE, 2000);
if (ret < 0)
return ret;
info->isp_ready = 1;
ret = m5mols_get_version(sd);
if (!ret)
ret = m5mols_update_fw(sd, m5mols_sensor_power);
if (ret)
return ret;
v4l2_dbg(1, m5mols_debug, sd, "Success ARM Booting\n");
ret = m5mols_write(sd, PARM_INTERFACE, REG_INTERFACE_MIPI);
if (!ret)
ret = m5mols_enable_interrupt(sd,
REG_INT_AF | REG_INT_CAPTURE);
return ret;
}
/**
* m5mols_s_power - Main sensor power control function
*
* To prevent breaking the lens when the sensor is powered off the Soft-Landing
* algorithm is called where available. The Soft-Landing algorithm availability
* dependends on the firmware provider.
*/
static int m5mols_s_power(struct v4l2_subdev *sd, int on)
{
struct m5mols_info *info = to_m5mols(sd);
int ret;
if (on) {
ret = m5mols_sensor_power(info, true);
if (!ret)
ret = m5mols_fw_start(sd);
return ret;
}
if (is_manufacturer(info, REG_SAMSUNG_TECHWIN)) {
ret = m5mols_set_mode(info, REG_MONITOR);
if (!ret)
ret = m5mols_write(sd, AF_EXECUTE, REG_AF_STOP);
if (!ret)
ret = m5mols_write(sd, AF_MODE, REG_AF_POWEROFF);
if (!ret)
ret = m5mols_busy_wait(sd, SYSTEM_STATUS, REG_AF_IDLE,
0xff, -1);
if (ret < 0)
v4l2_warn(sd, "Soft landing lens failed\n");
}
ret = m5mols_sensor_power(info, false);
info->ctrl_sync = 0;
return ret;
}
static int m5mols_log_status(struct v4l2_subdev *sd)
{
struct m5mols_info *info = to_m5mols(sd);
v4l2_ctrl_handler_log_status(&info->handle, sd->name);
return 0;
}
static const struct v4l2_subdev_core_ops m5mols_core_ops = {
.s_power = m5mols_s_power,
.g_ctrl = v4l2_subdev_g_ctrl,
.s_ctrl = v4l2_subdev_s_ctrl,
.queryctrl = v4l2_subdev_queryctrl,
.querymenu = v4l2_subdev_querymenu,
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
.log_status = m5mols_log_status,
};
/*
* V4L2 subdev internal operations
*/
static int m5mols_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0);
*format = m5mols_default_ffmt[0];
return 0;
}
static const struct v4l2_subdev_internal_ops m5mols_subdev_internal_ops = {
.open = m5mols_open,
};
static const struct v4l2_subdev_ops m5mols_ops = {
.core = &m5mols_core_ops,
.pad = &m5mols_pad_ops,
.video = &m5mols_video_ops,
};
static irqreturn_t m5mols_irq_handler(int irq, void *data)
{
struct m5mols_info *info = to_m5mols(data);
atomic_set(&info->irq_done, 1);
wake_up_interruptible(&info->irq_waitq);
return IRQ_HANDLED;
}
static int __devinit m5mols_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct m5mols_platform_data *pdata = client->dev.platform_data;
struct m5mols_info *info;
struct v4l2_subdev *sd;
int ret;
if (pdata == NULL) {
dev_err(&client->dev, "No platform data\n");
return -EINVAL;
}
if (!gpio_is_valid(pdata->gpio_reset)) {
dev_err(&client->dev, "No valid RESET GPIO specified\n");
return -EINVAL;
}
if (!client->irq) {
dev_err(&client->dev, "Interrupt not assigned\n");
return -EINVAL;
}
info = kzalloc(sizeof(struct m5mols_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->pdata = pdata;
info->set_power = pdata->set_power;
ret = gpio_request(pdata->gpio_reset, "M5MOLS_NRST");
if (ret) {
dev_err(&client->dev, "Failed to request gpio: %d\n", ret);
goto out_free;
}
gpio_direction_output(pdata->gpio_reset, pdata->reset_polarity);
ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(supplies), supplies);
if (ret) {
dev_err(&client->dev, "Failed to get regulators: %d\n", ret);
goto out_gpio;
}
sd = &info->sd;
v4l2_i2c_subdev_init(sd, client, &m5mols_ops);
strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
sd->internal_ops = &m5mols_subdev_internal_ops;
info->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_init(&sd->entity, 1, &info->pad, 0);
if (ret < 0)
goto out_reg;
sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
init_waitqueue_head(&info->irq_waitq);
ret = request_irq(client->irq, m5mols_irq_handler,
IRQF_TRIGGER_RISING, MODULE_NAME, sd);
if (ret) {
dev_err(&client->dev, "Interrupt request failed: %d\n", ret);
goto out_me;
}
info->res_type = M5MOLS_RESTYPE_MONITOR;
info->ffmt[0] = m5mols_default_ffmt[0];
info->ffmt[1] = m5mols_default_ffmt[1];
ret = m5mols_sensor_power(info, true);
if (ret)
goto out_me;
ret = m5mols_fw_start(sd);
if (!ret)
ret = m5mols_init_controls(sd);
m5mols_sensor_power(info, false);
if (!ret)
return 0;
out_me:
media_entity_cleanup(&sd->entity);
out_reg:
regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
out_gpio:
gpio_free(pdata->gpio_reset);
out_free:
kfree(info);
return ret;
}
static int __devexit m5mols_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct m5mols_info *info = to_m5mols(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(sd->ctrl_handler);
free_irq(client->irq, sd);
regulator_bulk_free(ARRAY_SIZE(supplies), supplies);
gpio_free(info->pdata->gpio_reset);
media_entity_cleanup(&sd->entity);
kfree(info);
return 0;
}
static const struct i2c_device_id m5mols_id[] = {
{ MODULE_NAME, 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, m5mols_id);
static struct i2c_driver m5mols_i2c_driver = {
.driver = {
.name = MODULE_NAME,
},
.probe = m5mols_probe,
.remove = __devexit_p(m5mols_remove),
.id_table = m5mols_id,
};
module_i2c_driver(m5mols_i2c_driver);
MODULE_AUTHOR("HeungJun Kim <riverful.kim@samsung.com>");
MODULE_AUTHOR("Dongsoo Kim <dongsoo45.kim@samsung.com>");
MODULE_DESCRIPTION("Fujitsu M-5MOLS 8M Pixel camera driver");
MODULE_LICENSE("GPL");
