static int ltr558_devinit(void)
{
int error;
int init_ps_gain;
int init_als_gain;
mdelay(PON_DELAY);
// Enable PS to Gain1 at startup
init_ps_gain = PS_RANGE1;
//ps_gainrange = init_ps_gain;
error = ltr558_ps_enable(init_ps_gain);
if (error < 0)
{
printk("[ltr558] device init error!!!\n");
goto out;
}
// Enable ALS to Full Range at startup
init_als_gain = ALS_RANGE2_64K;
//als_gainrange = init_als_gain;
error = ltr558_als_enable(init_als_gain);
if (error < 0)
{
printk("[ltr558] device init error!!!\n");
goto out;
}
error = 0;
printk("[ltr558] device init success!!!\n");
out:
return error;
}
static ssize_t store_als_enable(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ltr558_chip *chip = iio_priv(indio_dev);
struct i2c_client *client = chip->client;
int err = 0;
unsigned long lval;
dev_vdbg(dev, "%s()\n", __func__);
if (strict_strtoul(buf, 10, &lval))
return -EINVAL;
if ((lval != 1) && (lval != 0)) {
dev_err(dev, "illegal value %lu\n", lval);
return -EINVAL;
}
mutex_lock(&chip->lock);
if (lval == 1)
err = ltr558_als_enable(client, chip->als_gainrange);
else
err = ltr558_als_disable(client);
if (err < 0)
dev_err(dev, "Error in enabling ALS\n");
else
chip->is_als_enable = (lval) ? true : false;
mutex_unlock(&chip->lock);
return count;
}
/*******************************************
function:enable or disable the L-sensor
parameter:
@l_flag:the flag that we want to disblae or enable L-sensor
LS_ENABLE: enable L-sensor
LS_DISABLE: disable L-sensor
return:
return none zero means fail
********************************************/
static int ltr558_updata_als_status(short l_flag){
int result = 0;
if((ALS_ENABLE == l_flag) && (ALS_DISABLE == ltr558_data->l_enable)){
P_L_printk("enable L-sensor\n");
result = ltr558_als_enable(ALS_GAINRANGE);
if (0 == result){
ltr558_data->l_enable = ALS_ENABLE;
}
}else if((ALS_DISABLE == l_flag) && (ALS_ENABLE == ltr558_data->l_enable)){
P_L_printk("disable L-sensor\n");
result = ltr558_als_disable();
if(0 == result){
ltr558_data->l_enable = ALS_DISABLE;
}
}else{
LTRDBG("L-sensor already %s\n", (l_flag) ? "enable" : "disable");
result = 0;
}
return result;
}
static int ltr558_chip_init(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct ltr558_chip *chip = iio_priv(indio_dev);
int error = 0;
msleep(PON_DELAY);
chip->is_prox_enable = 0;
chip->prox_low_thres = 0;
chip->prox_high_thres = 0x7FF;
chip->prox_reading = 0;
chip->als_low_thres = 0;
chip->als_high_thres = 0xFFFF;
chip->als_reading = 0;
chip->is_als_enable = 0;
chip->prox_persist = 0;
chip->als_persist = 0;
/* Enable PS to Gain1 at startup */
chip->ps_gainrange = PS_RANGE1;
error = ltr558_ps_enable(client, chip->ps_gainrange);
if (error < 0)
goto out;
/* Enable ALS to Full Range at startup */
chip->als_gainrange = ALS_RANGE2_64K;
error = ltr558_als_enable(client, chip->als_gainrange);
if (error < 0)
goto out;
out:
return error;
}
static int ltr558_probe(struct i2c_client *client, const struct i2c_device_id *id){
int ret = 0;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
/* Return 1 if adapter supports everything we need, 0 if not. */
if (!i2c_check_functionality(adapter,
I2C_FUNC_SMBUS_WRITE_BYTE |I2C_FUNC_SMBUS_READ_BYTE_DATA)){
LTRERR(KERN_ALERT "%s: LTR-558ALS functionality check failed.\n", __func__);
ret = -EIO;
goto exit_check_functionality_failed;
}
/* data memory allocation */
ltr558_data = kzalloc(sizeof(struct ltr558_data), GFP_KERNEL);
if (ltr558_data == NULL) {
LTRERR(KERN_ALERT "%s: LTR-558ALS kzalloc failed.\n", __func__);
ret = -ENOMEM;
goto exit_alloc_data_failed;
}
ltr558_data->ltr558_irq = client->irq;
//printk("%s: Irq number is == %d\n",client->irq);
ltr558_data->p_enable = 0;
ltr558_data->l_enable = 0;
ltr558_data->ltr558_input = NULL;
ltr558_data->client = client;
INIT_WORK(&(ltr558_data->irq_workqueue),ltr558_schedwork);
i2c_set_clientdata(client, ltr558_data);
/*init device by send i2c command*/
ret = ltr558_devinit();
if (ret) {
LTRERR(KERN_ALERT "%s: LTR-558ALS device init failed.\n", __func__);
goto exit_device_init_failed;
}
/*init & register input dev*/
ltr558_data->ltr558_input = input_allocate_device();
if (ltr558_data->ltr558_input == NULL) {
LTRERR(KERN_ALERT "%s: LTR-558ALS cllocate input device fail.\n", __func__);
ret = -ENOMEM;
goto exit_input_dev_alloc_failed;
}
ltr558_data->ltr558_input->name = "lightsensor";
set_bit(EV_ABS, ltr558_data->ltr558_input->evbit);
input_set_abs_params(ltr558_data->ltr558_input, ABS_MISC, 0, 100000, 0, 0);
input_set_abs_params(ltr558_data->ltr558_input, ABS_DISTANCE, 0, 128, 0, 0);
ret = input_register_device(ltr558_data->ltr558_input);
if (ret) {
LTRERR(KERN_ALERT "%s: LTR-558ALS failed to register input device.\n", __func__);
goto exit_input_register_device_failed;
}
/*register misc device*/
ret = misc_register(<r558_device);
if (ret) {
LTRERR(KERN_ALERT "%s: LTR-558ALS misc_register als failed.\n", __func__);
goto exit_misc_device_register_failed;
}
/*init irq*/
ret = ltr558_gpio_irq();
if (ret) {
LTRERR(KERN_ALERT "%s: LTR-558ALS gpio_irq failed.\n", __func__);
goto exit_irq_request_failed;
}
#if 0
//add charles.hu just for test
mdelay(600);
ltr558_als_enable(ALS_RANGE2_64K);
ltr558_ps_enable(PS_GAINRANGE);
mdelay(600);
P_L_printk("Ltr558 probe ok!!!\n");
//add end
#endif
return 0;
exit_irq_request_failed:
misc_deregister(<r558_device);
exit_misc_device_register_failed:
exit_input_register_device_failed:
input_free_device(ltr558_data->ltr558_input);
exit_input_dev_alloc_failed:
exit_device_init_failed:
kfree(ltr558_data);
exit_alloc_data_failed:
exit_check_functionality_failed:
return ret;
}
static int
ltr558_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
int ret = 0;
int flag;
int set_flag;
void __user *argp = (void __user *)arg;
switch (cmd)
{
case ECS_IOCTL_APP_SET_LFLAG:
{
LTR558_DBG("into set lflag!!!\n");
if (copy_from_user(&flag, argp, sizeof(flag)))
{
return -EFAULT;
}
atomic_set(&l_flag, flag);
set_flag = atomic_read(&l_flag) ? 1 : 0;
/*set bit 1 of reg 0 by set_flag */
if (set_flag)
{
ret = ltr558_als_enable(ltr_this_data,als_gainrange);
if (ret < 0)
{
printk(KERN_ERR "%s:enable TLR558 als failed ,ret = %d\n", __func__,ret);
}
}
else
{
LTR558_DBG("%s:disable light sensor\n", __func__);
ret = ltr558_als_disable(ltr_this_data);
if (ret < 0)
{
printk(KERN_ERR "%s:LTR set diable LFLAG is error(%d)!", __func__, ret);
}
}
break;
}
case ECS_IOCTL_APP_GET_LFLAG:
{
flag = atomic_read(&l_flag);
printk(KERN_ERR "%s:get light flag\n", __func__);
if (copy_to_user(argp, &flag, sizeof(flag)))
{
return -EFAULT;
}
break;
}
case ECS_IOCTL_APP_SET_PFLAG:
{
if (copy_from_user(&flag, argp, sizeof(flag)))
{
return -EFAULT;
}
printk(KERN_ERR "%s:into ps_set \n", __func__);
atomic_set(&p_flag, flag);
set_flag = atomic_read(&p_flag) ? 1 : 0;
if (set_flag)
{
ret = ltr558_ps_enable(ltr_this_data,ps_gainrange);
if (ret < 0)
{
printk(KERN_ERR "%s:enable TLR558 ps failed . error(%d)!\n", __func__,ret);
}
}
else
{
ret = ltr558_ps_disable(ltr_this_data);
if (ret < 0)
{
printk(KERN_ERR "%s:LTR set ECS_IOCTL_APP_SET_PFLAG flag is error(%d)!", __func__, ret);
}
}
break;
}
case ECS_IOCTL_APP_GET_PFLAG:
{
flag = atomic_read(&p_flag);
printk(KERN_ERR "%s:get ps flag\n", __func__);
if (copy_to_user(argp, &flag, sizeof(flag)))
{
return -EFAULT;
}
break;
}
case ECS_IOCTL_APP_SET_DELAY:
{
printk(KERN_ERR "%s:set delay", __func__);
if (copy_from_user(&flag, argp, sizeof(flag)))
{
return -EFAULT;
}
if(flag)
ltr_558_delay = flag;
else
ltr_558_delay = 20;/*20ms*/
break;
}
case ECS_IOCTL_APP_GET_DELAY:
{
flag = ltr_558_delay;
if (copy_to_user(argp, &flag, sizeof(flag)))
{
return -EFAULT;
}
break;
}
default:
{
break;
}
}
return ret;
}
