/*
* ov2710.c - ov2710 sensor driver
*
* Copyright (c) 2011, NVIDIA, All Rights Reserved.
*
* Contributors:
* erik lilliebjerg <elilliebjerg@nvidia.com>
*
* Leverage OV5650.c
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <media/ov2710.h>
struct ov2710_reg {
u16 addr;
u16 val;
};
struct ov2710_info {
int mode;
struct i2c_client *i2c_client;
struct ov2710_platform_data *pdata;
};
#define OV2710_TABLE_WAIT_MS 0
#define OV2710_TABLE_END 1
#define OV2710_MAX_RETRIES 3
static struct ov2710_reg mode_1920x1080[] = {
{0x3103, 0x93},
{0x3008, 0x82},
{OV2710_TABLE_WAIT_MS, 5},
{0x3008, 0x42},
{OV2710_TABLE_WAIT_MS, 5},
{0x3017, 0x7f},
{0x3018, 0xfc},
{0x3706, 0x61},
{0x3712, 0x0c},
{0x3630, 0x6d},
{0x3801, 0xb4},
{0x3621, 0x04},
{0x3604, 0x60},
{0x3603, 0xa7},
{0x3631, 0x26},
{0x3600, 0x04},
{0x3620, 0x37},
{0x3623, 0x00},
{0x3702, 0x9e},
{0x3703, 0x5c},
{0x3704, 0x40},
{0x370d, 0x0f},
{0x3713, 0x9f},
{0x3714, 0x4c},
{0x3710, 0x9e},
{0x3801, 0xc4},
{0x3605, 0x05},
{0x3606, 0x3f},
{0x302d, 0x90},
{0x370b, 0x40},
{0x3716, 0x31},
{0x3707, 0x52},
{0x380d, 0x74},
{0x5181, 0x20},
{0x518f, 0x00},
{0x4301, 0xff},
{0x4303, 0x00},
{0x3a00, 0x78},
{0x300f, 0x88},
{0x3011, 0x28},
{0x3a1a, 0x06},
{0x3a18, 0x00},
{0x3a19, 0x7a},
{0x3a13, 0x54},
{0x382e, 0x0f},
{0x381a, 0x1a},
{0x401d, 0x02},
{0x381c, 0x00},
{0x381d, 0x02},
{0x381e, 0x04},
{0x381f, 0x38},
{0x3820, 0x00},
{0x3821, 0x98},
{0x3800, 0x01},
{0x3802, 0x00},
{0x3803, 0x0a},
{0x3804, 0x07},
{0x3805, 0x90},
{0x3806, 0x04},
{0x3807, 0x40},
{0x3808, 0x07},
{0x3809, 0x90},
{0x380a, 0x04},
{0x380b, 0x40},
{0x380e, 0x04},
{0x380f, 0x50},
{0x380c, 0x09},
{0x380d, 0x74},
{0x3810, 0x08},
{0x3811, 0x02},
{0x5688, 0x03},
{0x5684, 0x07},
{0x5685, 0xa0},
{0x5686, 0x04},
{0x5687, 0x43},
{0x3011, 0x0a},
{0x300f, 0x8a},
{0x3017, 0x00},
{0x3018, 0x00},
{0x4800, 0x24},
{0x300e, 0x04},
{0x4801, 0x0f},
{0x300f, 0xc3},
{0x3010, 0x00},
{0x3011, 0x0a},
{0x3012, 0x01},
{0x3a0f, 0x40},
{0x3a10, 0x38},
{0x3a1b, 0x48},
{0x3a1e, 0x30},
{0x3a11, 0x90},
{0x3a1f, 0x10},
{0x3a0e, 0x03},
{0x3a0d, 0x04},
{0x3a08, 0x14},
{0x3a09, 0xc0},
{0x3a0a, 0x11},
{0x3a0b, 0x40},
{0x300f, 0xc3},
{0x3010, 0x00},
{0x3011, 0x0e},
{0x3012, 0x02},
{0x380c, 0x09},
{0x380d, 0xec},
{0x3703, 0x61},
{0x3704, 0x44},
{0x3801, 0xd2},
{0x3503, 0x17},
{0x3500, 0x00},
{0x3501, 0x00},
{0x3502, 0x00},
{0x350a, 0x00},
{0x350b, 0x00},
{0x5001, 0x4e},
{0x5000, 0x5f},
{0x3008, 0x02},
{OV2710_TABLE_END, 0x0000}
};
static struct ov2710_reg mode_1280x720[] = {
{0x3103, 0x93},
{0x3008, 0x82},
{OV2710_TABLE_WAIT_MS, 5},
{0x3008, 0x42},
{OV2710_TABLE_WAIT_MS, 5},
{0x3017, 0x7f},
{0x3018, 0xfc},
{0x3706, 0x61},
{0x3712, 0x0c},
{0x3630, 0x6d},
{0x3801, 0xb4},
{0x3621, 0x04},
{0x3604, 0x60},
{0x3603, 0xa7},
{0x3631, 0x26},
{0x3600, 0x04},
{0x3620, 0x37},
{0x3623, 0x00},
{0x3702, 0x9e},
{0x3703, 0x5c},
{0x3704, 0x40},
{0x370d, 0x0f},
{0x3713, 0x9f},
{0x3714, 0x4c},
{0x3710, 0x9e},
{0x3801, 0xc4},
{0x3605, 0x05},
{0x3606, 0x3f},
{0x302d, 0x90},
{0x370b, 0x40},
{0x3716, 0x31},
{0x3707, 0x52},
{0x380d, 0x74},
{0x5181, 0x20},
{0x518f, 0x00},
{0x4301, 0xff},
{0x4303, 0x00},
{0x3a00, 0x78},
{0x300f, 0x88},
{0x3011, 0x28},
{0x3a1a, 0x06},
{0x3a18, 0x00},
{0x3a19, 0x7a},
{0x3a13, 0x54},
{0x382e, 0x0f},
{0x381a, 0x1a},
{0x401d, 0x02},
{0x381c, 0x10},
{0x381d, 0xb0},
{0x381e, 0x02},
{0x381f, 0xec},
{0x3800, 0x01},
{0x3820, 0x0a},
{0x3821, 0x2a},
{0x3804, 0x05},
{0x3805, 0x10},
{0x3802, 0x00},
{0x3803, 0x04},
{0x3806, 0x02},
{0x3807, 0xe0},
{0x3808, 0x05},
{0x3809, 0x10},
{0x380a, 0x02},
{0x380b, 0xe0},
{0x380e, 0x02},
{0x380f, 0xf0},
{0x380c, 0x07},
{0x380d, 0x00},
{0x3810, 0x10},
{0x3811, 0x06},
{0x5688, 0x03},
{0x5684, 0x05},
{0x5685, 0x00},
{0x5686, 0x02},
{0x5687, 0xd0},
{0x3a08, 0x1b},
{0x3a09, 0xe6},
{0x3a0a, 0x17},
{0x3a0b, 0x40},
{0x3a0e, 0x01},
{0x3a0d, 0x02},
{0x3011, 0x0a},
{0x300f, 0x8a},
{0x3017, 0x00},
{0x3018, 0x00},
{0x4800, 0x24},
{0x300e, 0x04},
{0x4801, 0x0f},
{0x300f, 0xc3},
{0x3a0f, 0x40},
{0x3a10, 0x38},
{0x3a1b, 0x48},
{0x3a1e, 0x30},
{0x3a11, 0x90},
{0x3a1f, 0x10},
{0x3010, 0x10},
{0x3a0e, 0x02},
{0x3a0d, 0x03},
{0x3a08, 0x0d},
{0x3a09, 0xf3},
{0x3a0a, 0x0b},
{0x3a0b, 0xa0},
{0x300f, 0xc3},
{0x3011, 0x0e},
{0x3012, 0x02},
{0x380c, 0x07},
{0x380d, 0x6a},
{0x3703, 0x5c},
{0x3704, 0x40},
{0x3801, 0xbc},
{0x3503, 0x17},
{0x3500, 0x00},
{0x3501, 0x00},
{0x3502, 0x00},
{0x350a, 0x00},
{0x350b, 0x00},
{0x5001, 0x4e},
{0x5000, 0x5f},
{0x3008, 0x02},
{OV2710_TABLE_END, 0x0000}
};
enum {
OV2710_MODE_1920x1080,
OV2710_MODE_1280x720,
};
static struct ov2710_reg *mode_table[] = {
[OV2710_MODE_1920x1080] = mode_1920x1080,
[OV2710_MODE_1280x720] = mode_1280x720,
};
static inline void ov2710_get_frame_length_regs(struct ov2710_reg *regs,
u32 frame_length)
{
regs->addr = 0x380e;
regs->val = (frame_length >> 8) & 0xff;
(regs + 1)->addr = 0x380f;
(regs + 1)->val = (frame_length) & 0xff;
}
static inline void ov2710_get_coarse_time_regs(struct ov2710_reg *regs,
u32 coarse_time)
{
regs->addr = 0x3500;
regs->val = (coarse_time >> 12) & 0xff;
(regs + 1)->addr = 0x3501;
(regs + 1)->val = (coarse_time >> 4) & 0xff;
(regs + 2)->addr = 0x3502;
(regs + 2)->val = (coarse_time & 0xf) << 4;
}
static inline void ov2710_get_gain_reg(struct ov2710_reg *regs, u16 gain)
{
regs->addr = 0x350b;
regs->val = gain;
}
static int ov2710_read_reg(struct i2c_client *client, u16 addr, u8 *val)
{
int err;
struct i2c_msg msg[2];
unsigned char data[3];
if (!client->adapter)
return -ENODEV;
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].len = 2;
msg[0].buf = data;
/* high byte goes out first */
data[0] = (u8) (addr >> 8);;
data[1] = (u8) (addr & 0xff);
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = 1;
msg[1].buf = data + 2;
err = i2c_transfer(client->adapter, msg, 2);
if (err != 2)
return -EINVAL;
*val = data[2];
return 0;
}
static int ov2710_write_reg(struct i2c_client *client, u16 addr, u8 val)
{
int err;
struct i2c_msg msg;
unsigned char data[3];
int retry = 0;
if (!client->adapter)
return -ENODEV;
data[0] = (u8) (addr >> 8);;
data[1] = (u8) (addr & 0xff);
data[2] = (u8) (val & 0xff);
msg.addr = client->addr;
msg.flags = 0;
msg.len = 3;
msg.buf = data;
do {
err = i2c_transfer(client->adapter, &msg, 1);
if (err == 1)
return 0;
retry++;
pr_err("ov2710: i2c transfer failed, retrying %x %x\n",
addr, val);
msleep(3);
} while (retry <= OV2710_MAX_RETRIES);
return err;
}
static int ov2710_write_table(struct i2c_client *client,
const struct ov2710_reg table[],
const struct ov2710_reg override_list[],
int num_override_regs)
{
int err;
const struct ov2710_reg *next;
int i;
u16 val;
for (next = table; next->addr != OV2710_TABLE_END; next++) {
if (next->addr == OV2710_TABLE_WAIT_MS) {
msleep(next->val);
continue;
}
val = next->val;
/* When an override list is passed in, replace the reg */
/* value to write if the reg is in the list */
if (override_list) {
for (i = 0; i < num_override_regs; i++) {
if (next->addr == override_list[i].addr) {
val = override_list[i].val;
break;
}
}
}
err = ov2710_write_reg(client, next->addr, val);
if (err)
return err;
}
return 0;
}
static int ov2710_set_mode(struct ov2710_info *info, struct ov2710_mode *mode)
{
int sensor_mode;
int err;
struct ov2710_reg reg_list[6];
pr_info("%s: xres %u yres %u framelength %u coarsetime %u gain %u\n",
__func__, mode->xres, mode->yres, mode->frame_length,
mode->coarse_time, mode->gain);
if (mode->xres == 1920 && mode->yres == 1080)
sensor_mode = OV2710_MODE_1920x1080;
else if (mode->xres == 1280 && mode->yres == 720)
sensor_mode = OV2710_MODE_1280x720;
else {
pr_err("%s: invalid resolution supplied to set mode %d %d\n",
__func__, mode->xres, mode->yres);
return -EINVAL;
}
/* get a list of override regs for the asking frame length, */
/* coarse integration time, and gain. */
ov2710_get_frame_length_regs(reg_list, mode->frame_length);
ov2710_get_coarse_time_regs(reg_list + 2, mode->coarse_time);
ov2710_get_gain_reg(reg_list + 5, mode->gain);
err = ov2710_write_table(info->i2c_client, mode_table[sensor_mode],
reg_list, 6);
if (err)
return err;
info->mode = sensor_mode;
return 0;
}
static int ov2710_set_frame_length(struct ov2710_info *info, u32 frame_length)
{
struct ov2710_reg reg_list[2];
int i = 0;
int ret;
ov2710_get_frame_length_regs(reg_list, frame_length);
for (i = 0; i < 2; i++) {
ret = ov2710_write_reg(info->i2c_client, reg_list[i].addr,
reg_list[i].val);
if (ret)
return ret;
}
return 0;
}
static int ov2710_set_coarse_time(struct ov2710_info *info, u32 coarse_time)
{
int ret;
struct ov2710_reg reg_list[3];
int i = 0;
ov2710_get_coarse_time_regs(reg_list, coarse_time);
ret = ov2710_write_reg(info->i2c_client, 0x3212, 0x01);
if (ret)
return ret;
for (i = 0; i < 3; i++) {
ret = ov2710_write_reg(info->i2c_client, reg_list[i].addr,
reg_list[i].val);
if (ret)
return ret;
}
ret = ov2710_write_reg(info->i2c_client, 0x3212, 0x11);
if (ret)
return ret;
ret = ov2710_write_reg(info->i2c_client, 0x3212, 0xa1);
if (ret)
return ret;
return 0;
}
static int ov2710_set_gain(struct ov2710_info *info, u16 gain)
{
int ret;
struct ov2710_reg reg_list;
ov2710_get_gain_reg(®_list, gain);
ret = ov2710_write_reg(info->i2c_client, reg_list.addr, reg_list.val);
return ret;
}
static int ov2710_get_status(struct ov2710_info *info, u8 *status)
{
int err;
*status = 0;
err = ov2710_read_reg(info->i2c_client, 0x002, status);
return err;
}
static long ov2710_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
int err;
struct ov2710_info *info = file->private_data;
switch (cmd) {
case OV2710_IOCTL_SET_MODE:
{
struct ov2710_mode mode;
if (copy_from_user(&mode,
(const void __user *)arg,
sizeof(struct ov2710_mode))) {
return -EFAULT;
}
return ov2710_set_mode(info, &mode);
}
case OV2710_IOCTL_SET_FRAME_LENGTH:
return ov2710_set_frame_length(info, (u32)arg);
case OV2710_IOCTL_SET_COARSE_TIME:
return ov2710_set_coarse_time(info, (u32)arg);
case OV2710_IOCTL_SET_GAIN:
return ov2710_set_gain(info, (u16)arg);
case OV2710_IOCTL_GET_STATUS:
{
u8 status;
err = ov2710_get_status(info, &status);
if (err)
return err;
if (copy_to_user((void __user *)arg, &status,
2)) {
return -EFAULT;
}
return 0;
}
default:
return -EINVAL;
}
return 0;
}
static struct ov2710_info *info;
static int ov2710_open(struct inode *inode, struct file *file)
{
u8 status;
file->private_data = info;
if (info->pdata && info->pdata->power_on)
info->pdata->power_on();
ov2710_get_status(info, &status);
return 0;
}
int ov2710_release(struct inode *inode, struct file *file)
{
if (info->pdata && info->pdata->power_off)
info->pdata->power_off();
file->private_data = NULL;
return 0;
}
static const struct file_operations ov2710_fileops = {
.owner = THIS_MODULE,
.open = ov2710_open,
.unlocked_ioctl = ov2710_ioctl,
.release = ov2710_release,
};
static struct miscdevice ov2710_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "ov2710",
.fops = &ov2710_fileops,
};
static int ov2710_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int err;
pr_info("ov2710: probing sensor.\n");
info = kzalloc(sizeof(struct ov2710_info), GFP_KERNEL);
if (!info) {
pr_err("ov2710: Unable to allocate memory!\n");
return -ENOMEM;
}
err = misc_register(&ov2710_device);
if (err) {
pr_err("ov2710: Unable to register misc device!\n");
kfree(info);
return err;
}
info->pdata = client->dev.platform_data;
info->i2c_client = client;
i2c_set_clientdata(client, info);
return 0;
}
static int ov2710_remove(struct i2c_client *client)
{
struct ov2710_info *info;
info = i2c_get_clientdata(client);
misc_deregister(&ov2710_device);
kfree(info);
return 0;
}
static const struct i2c_device_id ov2710_id[] = {
{ "ov2710", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, ov2710_id);
static struct i2c_driver ov2710_i2c_driver = {
.driver = {
.name = "ov2710",
.owner = THIS_MODULE,
},
.probe = ov2710_probe,
.remove = ov2710_remove,
.id_table = ov2710_id,
};
static int __init ov2710_init(void)
{
pr_info("ov2710 sensor driver loading\n");
return i2c_add_driver(&ov2710_i2c_driver);
}
static void __exit ov2710_exit(void)
{
i2c_del_driver(&ov2710_i2c_driver);
}
module_init(ov2710_init);
module_exit(ov2710_exit);
