static int bh1721fvc_enable(struct bh1721fvc_data *bh1721fvc)
{
int err;
bh1721fvc_dbmsg("starting poll timer, delay %lldns\n",
ktime_to_ns(bh1721fvc->light_poll_delay));
err = bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_ON]);
if (err) {
pr_err("%s: Failed to write byte (POWER_ON)\n", __func__);
goto err_power_on;
}
err =
bh1721fvc_write_byte(bh1721fvc->client,
commands[bh1721fvc->measure_mode]);
if (err) {
pr_err("%s: Failed to write byte (measure mode)\n", __func__);
goto err_measure_mode;
}
if (bh1721fvc->measure_mode == H_MEASURE)
mdelay(120);
else if (bh1721fvc->measure_mode == L_MEASURE)
mdelay(16);
else
/* AUTO_MEASURE */
mdelay(120 + 16);
hrtimer_start(&bh1721fvc->timer, bh1721fvc->light_poll_delay,
HRTIMER_MODE_REL);
goto done;
err_measure_mode:
err_power_on:
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
done:
return err;
}
static ssize_t factory_file_illuminance_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u16 lux;
int retry;
int err;
unsigned int result;
struct bh1721fvc_data *bh1721fvc = dev_get_drvdata(dev);
if (bh1721fvc->state == POWER_DOWN) {
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[POWER_ON]);
if (err)
goto err_exit;
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[AUTO_MEASURE]);
if (err)
goto err_exit;
msleep(210);
}
for (retry = 0; retry < 10; retry++) {
if (i2c_master_recv(bh1721fvc->client,
(u8 *)&lux, 2) == 2) {
be16_to_cpus(&lux);
break;
}
}
if (retry == 10) {
printk(KERN_INFO "I2C read failed.. retry %d\n", retry);
goto err_exit;
}
/*
* result = (lux * 10) / 12;
* result = result * 139 / 13;
*/
result = (lux * 89) / 10;
if (result <= 8)
result = 0;
if (bh1721fvc->state == POWER_DOWN)
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
return sprintf(buf, "%u\n", result);
err_exit:
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
return err;
}
static int bh1721fvc_enable(struct bh1721fvc_data *bh1721fvc)
{
int err;
#if defined(CONFIG_MACH_SAMSUNG_P4TMO)
bh1721fvc->light_buffer = 0;
bh1721fvc->light_count = 0;
bh1721fvc->light_level_state = 0;
bh1721fvc->light_buffer_cnt = LIGHT_UPWORD_BUFFER;
#endif
#if defined(CONFIG_MACH_SAMSUNG_P5)
bh1721fvc->reset_cnt = 0;
bh1721fvc->zero_cnt = 0;
#endif
bh1721fvc_dbmsg("starting poll timer, delay %lldns\n",
ktime_to_ns(bh1721fvc->light_poll_delay));
err = bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_ON]);
if (err) {
pr_err("%s: Failed to write byte (POWER_ON)\n", __func__);
goto err_power_on;
}
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[bh1721fvc->measure_mode]);
if (err) {
pr_err("%s: Failed to write byte (measure mode)\n", __func__);
goto err_measure_mode;
}
if (bh1721fvc->measure_mode == H_MEASURE)
mdelay(120);
else if (bh1721fvc->measure_mode == L_MEASURE)
mdelay(16);
else /* AUTO_MEASURE */
mdelay(120 + 16);
hrtimer_start(&bh1721fvc->timer, bh1721fvc->light_poll_delay,
HRTIMER_MODE_REL);
goto done;
err_measure_mode:
err_power_on:
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
done:
return err;
}
int bh1721fvc_test_luxvalue(struct bh1721fvc_data *bh1721fvc)
{
unsigned int result;
int retry;
u16 lux;
int err;
if (bh1721fvc->state == POWER_DOWN) {
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[POWER_ON]);
if (err)
return err;
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[AUTO_MEASURE]);
if (err)
goto err_exit;
msleep(210);
}
for (retry = 0; retry < 5; retry++) {
if (i2c_master_recv(bh1721fvc->client,
(u8 *)&lux, 2) == 2) {
be16_to_cpus(&lux);
break;
}
}
if (retry == 5) {
printk(KERN_INFO "I2C read failed.. retry %d\n", retry);
goto err_exit;
}
result = (lux * 10) / 12;
result = result * 139 / 13;
if (bh1721fvc->state == POWER_DOWN)
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
return (int)result;
err_exit:
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
return err;
}
static int bh1721fvc_reset(struct bh1721fvc_data *bh1721fvc)
{
int err = 0;
bh1721fvc->reset();
msleep(20);
if (bh1721fvc_is_measuring(bh1721fvc)) {
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[POWER_DOWN]);
if (err) {
printk(KERN_INFO "%s: Failed to write byte (POWER_ON)\n",
__func__);
return err;
}
msleep(20);
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[POWER_ON]);
if (err) {
printk(KERN_INFO "%s: Failed to write byte (POWER_ON)\n",
__func__);
return err;
}
err = bh1721fvc_write_byte(bh1721fvc->client,
commands[bh1721fvc->measure_mode]);
if (err) {
printk(KERN_INFO "%s: Failed to write byte (measure mode)\n",
__func__);
return err;
}
if (bh1721fvc->measure_mode == H_MEASURE)
mdelay(120);
else if (bh1721fvc->measure_mode == L_MEASURE)
mdelay(16);
else /* AUTO_MEASURE */
mdelay(120 + 16);
}
printk(KERN_INFO "bh1721fvc_reset done!\n");
return 0;
}
static ssize_t bh1721fvc_light_sensor_lux_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
u16 lux;
int retry;
int err;
u32 result;
struct bh1721fvc_data *bh1721fvc = dev_get_drvdata(dev);
if (bh1721fvc->state == POWER_DOWN) {
err =
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_ON]);
if (err)
goto err_exit;
err =
bh1721fvc_write_byte(bh1721fvc->client,
commands[AUTO_MEASURE]);
if (err)
goto err_exit;
msleep(210);
}
for (retry = 0; retry < 10; retry++) {
if (i2c_master_recv(bh1721fvc->client, (u8 *) &lux, 2) == 2) {
be16_to_cpus(&lux);
break;
}
}
if (retry == 10) {
pr_err("%s : I2C read failed.. retry %d\n", __func__, retry);
goto err_exit;
}
result = (lux * 89) / 10;
if (bh1721fvc->state == POWER_DOWN)
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
return sprintf(buf, "%u\n", result);
err_exit:
bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
return err;
}
static int bh1721fvc_disable(struct bh1721fvc_data *bh1721fvc)
{
int err;
hrtimer_cancel(&bh1721fvc->timer);
cancel_work_sync(&bh1721fvc->work_light);
err = bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
if (unlikely(err != 0))
pr_err("%s: Failed to write byte (POWER_DOWN)\n", __func__);
return err;
}
static int bh1721fvc_reset(struct bh1721fvc_data *bh1721fvc)
{
int ret = 0,err;
// reset sensor
bh1721fvc->reset();
printk("bh1721fvc->reset()\n");
msleep(10);
// disable & enable sensor again
if (bh1721fvc_is_measuring(bh1721fvc))
{
err = bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_DOWN]);
msleep(10);
err = bh1721fvc_write_byte(bh1721fvc->client, commands[POWER_ON]);
if (err) {
printk("%s: Failed to write byte (POWER_ON)\n", __func__);
}
err = bh1721fvc_write_byte(bh1721fvc->client, commands[bh1721fvc->measure_mode]);
if (err) {
printk("%s: Failed to write byte (measure mode)\n", __func__);
}
if (bh1721fvc->measure_mode == H_MEASURE)
mdelay(120);
else if (bh1721fvc->measure_mode == L_MEASURE)
mdelay(16);
else /* AUTO_MEASURE */
mdelay(120 + 16);
}
printk("bh1721fvc_reset done!\n");
return ret;
}
