static int pn547_remove(struct i2c_client *client)
{
struct pn547_dev *pn547_dev;
pn547_dev = i2c_get_clientdata(client);
free_irq(pn547_gpio_to_irq(pn547_dev), pn547_dev);
misc_deregister(&pn547_dev->pn547_device);
mutex_destroy(&pn547_dev->read_mutex);
#ifdef CONFIG_LGE_NFC_USE_PMIC
pn547_change_clk(pn547_dev, CLK_DISABLE);
#endif
gpio_free(pn547_dev->firm_gpio);
gpio_free(pn547_dev->ven_gpio);
gpio_free(pn547_dev->irq_gpio);
kfree(pn547_dev);
return 0;
}
static long pn547_dev_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct pn547_dev *pn547_dev = filp->private_data;
unsigned long flags;
switch (cmd) {
case pn547_SET_PWR:
if (arg == 2) {
/*
power on with firmware download (requires hw reset)
*/
dprintk(PN547_DRV_NAME ":%s power on with firmware\n", __func__);
gpio_set_value(pn547_dev->ven_gpio, 1);
gpio_set_value(pn547_dev->firm_gpio, 1);
msleep(10);
gpio_set_value(pn547_dev->ven_gpio, 0);
msleep(10);
gpio_set_value(pn547_dev->ven_gpio, 1);
msleep(10);
} else if (arg == 1) {
/* power on */
pr_info(PN547_DRV_NAME ":%s power on\n", __func__);
if (sPowerState == NFC_POWER_OFF) {
#ifdef CONFIG_LGE_NFC_USE_PMIC
if(clk_source == CLKS_PMIC)
pn547_change_clk(pn547_dev, CLK_PIN);
#endif
gpio_set_value(pn547_dev->firm_gpio, 0);
gpio_set_value(pn547_dev->ven_gpio, 1);
msleep(10);
spin_lock_irqsave(&pn547_dev->irq_enabled_lock, flags);
#ifdef CONFIG_LGE_NFC_SET_IRQ_WAKEUP
if (sIrqState == false) {
irq_set_irq_wake(pn547_dev->client->irq,1);
sIrqState = true;
pr_info(PN547_DRV_NAME ":%s enable IRQ\n", __func__);
}
else {
pr_err("%s IRQ is already enabled!\n", __func__);
}
#endif
//pr_err("%s NFC_POWER_ON\n", __func__); // for debug
sPowerState = NFC_POWER_ON;
spin_unlock_irqrestore(&pn547_dev->irq_enabled_lock, flags);
}
else {
pr_err("%s NFC is alread On!\n", __func__);
}
} else if (arg == 0) {
/* power off */
pr_info(PN547_DRV_NAME ":%s power off\n", __func__);
if (sPowerState == NFC_POWER_ON) {
#ifdef CONFIG_LGE_NFC_USE_PMIC
if(clk_source == CLKS_PMIC)
pn547_change_clk(pn547_dev, CLK_DISABLE);
#endif
gpio_set_value(pn547_dev->firm_gpio, 0);
gpio_set_value(pn547_dev->ven_gpio, 0);
msleep(10);
spin_lock_irqsave(&pn547_dev->irq_enabled_lock, flags);
#ifdef CONFIG_LGE_NFC_SET_IRQ_WAKEUP
if (sIrqState == true) {
irq_set_irq_wake(pn547_dev->client->irq,0);
sIrqState = false;
dprintk(PN547_DRV_NAME ":%s disable IRQ\n", __func__);
}
else {
pr_err("%s IRQ is already disabled!\n", __func__);
}
#endif
if (sIsWakeLocked == true) {
pr_err("%s: Release Wake_Lock\n", __func__);
wake_unlock(&nfc_wake_lock);
sIsWakeLocked = false;
}
//pr_err("%s NFC_POWER_OFF\n", __func__); // for debug
sPowerState = NFC_POWER_OFF;
spin_unlock_irqrestore(&pn547_dev->irq_enabled_lock, flags);
}
else {
pr_err("%s NFC is alread Off!\n", __func__);
}
} else {
pr_err("%s bad arg %ld\n", __func__, arg);
return -EINVAL;
}
break;
case pn547_HW_REVISION:
{
return pn547_get_hw_revision();
}
#ifdef CONFIG_LGE_NFC_USE_PMIC
case pn547_CLKS_SET:
{
if(arg == 0){
clk_source = CLKS_XO;
dprintk(PN547_DRV_NAME "%s: clock source X-tal set!\n", __func__);
}else if(arg == 1){
clk_source = CLKS_PMIC;
dprintk(PN547_DRV_NAME "%s: clock source PMIC set!\n", __func__);
}else{
pr_err("%s: wrong clock source set clk source : %ld\n", __func__, arg);
return -1;
}
}
break;
#endif
default:
pr_err("%s bad ioctl %d\n", __func__, cmd);
return -EINVAL;
}
return 0;
}
static int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
struct pn547_dev *pn547_dev = NULL;
pn547_client = client;
pr_info(PN547_DRV_NAME ": pn547_probe() start\n");
pn547_dev = kzalloc(sizeof(*pn547_dev), GFP_KERNEL);
if (pn547_dev == NULL) {
dev_err(&client->dev,
"failed to allocate memory for module data\n");
ret = -ENOMEM;
goto err_exit;
}
pn547_parse_dt(&client->dev, pn547_dev);
pn547_dev->client = client;
dprintk(PN547_DRV_NAME ":IRQ : %d\nVEN : %d\nFIRM : %d\n",
pn547_dev->irq_gpio, pn547_dev->ven_gpio, pn547_dev->firm_gpio);
ret = gpio_request(pn547_dev->irq_gpio, "nfc_int");
if (ret) {
dprintk(PN547_DRV_NAME ":pn547_probe() : nfc_int request failed!\n");
goto err_int;
}
ret = gpio_request(pn547_dev->ven_gpio, "nfc_ven");
if (ret) {
dprintk(PN547_DRV_NAME ":pn547_probe() : nfc_ven request failed!\n");
goto err_ven;
}
ret = gpio_request(pn547_dev->firm_gpio, "nfc_firm");
if (ret) {
dprintk(PN547_DRV_NAME ":pn547_probe() : nfc_firm request failed!\n");
goto err_firm;
}
pn547_gpio_enable(pn547_dev);
#if defined(CONFIG_MACH_MSM8226_W7_GLOBAL_COM) || defined(CONFIG_MACH_MSM8226_W7_GLOBAL_SCA)
ret = gpio_direction_output(pn547_dev->ven_gpio,1);
#else
ret = gpio_direction_output(pn547_dev->ven_gpio,0);
#endif
ret = gpio_direction_output(pn547_dev->firm_gpio,0);
ret = gpio_direction_input(pn547_dev->irq_gpio);
#ifdef CONFIG_LGE_NFC_USE_PMIC
pn547_get_clk_source(pn547_dev);
pn547_change_clk(pn547_dev, CLK_PIN);
#endif
/* init mutex and queues */
init_waitqueue_head(&pn547_dev->read_wq);
mutex_init(&pn547_dev->read_mutex);
spin_lock_init(&pn547_dev->irq_enabled_lock);
pn547_dev->pn547_device.minor = MISC_DYNAMIC_MINOR;
pn547_dev->pn547_device.name = PN547_DRV_NAME;
pn547_dev->pn547_device.fops = &pn547_dev_fops;
ret = misc_register(&pn547_dev->pn547_device);
if (ret) {
pr_err("%s : misc_register failed\n", __FILE__);
goto err_misc_register;
}
wake_lock_init(&nfc_wake_lock, WAKE_LOCK_SUSPEND, "NFCWAKE");
/* request irq. the irq is set whenever the chip has data available
* for reading. it is cleared when all data has been read.
*/
pr_info("%s : requesting IRQ %d\n", __func__, client->irq);
ret = request_irq(pn547_gpio_to_irq(pn547_dev), pn547_dev_irq_handler,
IRQF_TRIGGER_RISING|IRQF_NO_SUSPEND, client->name, pn547_dev);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq_failed;
}
// Below code does not pack with pn547_enable_irq
// request irq make irq enable.
// so if irq enable in pn547_enable_irq called,
// unbalanced enable log will be appeared.
pn547_dev->irq_enabled = true;
enable_irq_wake(pn547_get_irq_pin(pn547_dev));
//
pn547_disable_irq(pn547_dev);
i2c_set_clientdata(client, pn547_dev);
pr_info(PN547_DRV_NAME ": pn547_probe() end\n");
return 0;
err_request_irq_failed:
misc_deregister(&pn547_dev->pn547_device);
err_misc_register:
mutex_destroy(&pn547_dev->read_mutex);
gpio_free(pn547_dev->firm_gpio);
err_firm:
gpio_free(pn547_dev->ven_gpio);
err_ven:
gpio_free(pn547_dev->irq_gpio);
err_int:
kfree(pn547_dev);
err_exit:
pr_err(PN547_DRV_NAME ": pn547_dev is null\n");
pr_err(PN547_DRV_NAME ": pn547_probe() end with error!\n");
return ret;
}
