static int __pn544_kread(void *dev, unsigned int length)
{
struct pn544_dev *pn544_dev = NULL;
char tmp[MAX_BUFFER_SIZE];
int ret = 0;
int irq_gpio_val = 0;
if(dev != NULL)
pn544_dev = (struct pn544_dev*)dev;
mutex_lock(&pn544_dev->read_mutex);
irq_gpio_val = gpio_get_value(pn544_dev->irq_gpio);
dprintk(PN544_DRV_NAME ":IRQ GPIO = %d\n", irq_gpio_val);
if (irq_gpio_val == 0) {
pn544_dev->irq_enabled = true;
#ifdef READ_IRQ_MODIFY
do_reading=0;//DY_TEST
#endif
enable_irq_wake(pn544_get_irq_pin(pn544_dev));
enable_irq(pn544_get_irq_pin(pn544_dev));
#ifdef READ_IRQ_MODIFY
ret = wait_event_interruptible(pn544_dev->read_wq, do_reading);
#else
ret = wait_event_interruptible(pn544_dev->read_wq, gpio_get_value(pn544_dev->irq_gpio));
#endif
pn544_disable_irq(pn544_dev);
if(ret){
mutex_unlock(&pn544_dev->read_mutex);
goto fail;
}
}
memset(tmp, 0x00, MAX_BUFFER_SIZE);
ret = i2c_master_recv(pn544_dev->client, tmp, length);
while(tmp[0]==0x51&&tmp[1]==0xFF&&tmp[2]==0xFF){
ret = i2c_master_recv(pn544_dev->client, tmp, length);
printk("%s read retry!\n", __func__);
}
mutex_unlock(&pn544_dev->read_mutex);
printk("%s: read data : 0x%X 0x%X 0x%X 0x%X\n", __func__, tmp[0], tmp[1], tmp[2], tmp[3]);
if (ret < 0) {
dprintk("%s: i2c_master_recv returned %d\n", __func__, ret);
return ret;
}
if (ret > length) {
pr_err("%s: received too many bytes from i2c (%d)\n", __func__, ret);
return -EIO;
}
fail:
return ret;
}
static void pn544_disable_irq(struct pn544_dev *pn544_dev)
{
unsigned long flags;
spin_lock_irqsave(&pn544_dev->irq_enabled_lock, flags);
if (pn544_dev->irq_enabled) {
disable_irq_nosync(pn544_get_irq_pin(pn544_dev));
//
#if !defined(CONFIG_LGE_NFC_HW_QCT_MSM8660)&&!defined(CONFIG_LGE_NFC_HW_QCT_MSM8255)
disable_irq_wake(pn544_get_irq_pin(pn544_dev));
#endif
pn544_dev->irq_enabled = false;
}
spin_unlock_irqrestore(&pn544_dev->irq_enabled_lock, flags);
}
static void pn544_disable_irq(struct pn544_dev *pn544_dev)
{
unsigned long flags;
spin_lock_irqsave(&pn544_dev->irq_enabled_lock, flags);
if (pn544_dev->irq_enabled) {
disable_irq_nosync(pn544_get_irq_pin(pn544_dev));
// 20120831, [email protected] Fix to irq interrupt in sleep mode.
#if !defined(CONFIG_LGE_NFC_HW_QCT_MSM8660) && !defined(CONFIG_LGE_NFC_HW_QCT_MSM8255)
disable_irq_wake(pn544_get_irq_pin(pn544_dev));
#endif
pn544_dev->irq_enabled = false;
}
spin_unlock_irqrestore(&pn544_dev->irq_enabled_lock, flags);
}
static void pn544_disable_irq(struct pn544_dev *pn544_dev)
{
unsigned long flags;
spin_lock_irqsave(&pn544_dev->irq_enabled_lock, flags);
if (pn544_dev->irq_enabled) {
disable_irq_nosync(pn544_get_irq_pin(pn544_dev));
//
//
// disable_irq_wake(pn544_get_irq_pin(pn544_dev));
//#endif
pn544_dev->irq_enabled = false;
}
spin_unlock_irqrestore(&pn544_dev->irq_enabled_lock, flags);
}
static int pn544_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
struct pn544_i2c_platform_data *platform_data;
struct pn544_dev *pn544_dev = NULL;
dprintk(PN544_DRV_NAME ": pn544_probe() start\n");
pn544_client = client;
platform_data = client->dev.platform_data;
if (platform_data == NULL) {
pr_err("%s : nfc probe fail\n", __func__);
return -ENODEV;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
pr_err("%s : need I2C_FUNC_I2C\n", __func__);
return -ENODEV;
}
ret = gpio_request(platform_data->irq_gpio, "nfc_int");
if (ret) {
dprintk(PN544_DRV_NAME ":pn544_probe() : nfc_int request failed!\n");
return -ENODEV;
}
ret = gpio_request(platform_data->ven_gpio, "nfc_ven");
if (ret) {
dprintk(PN544_DRV_NAME ":pn544_probe() : nfc_ven request failed!\n");
goto err_ven;
}
ret = gpio_request(platform_data->firm_gpio, "nfc_firm");
if (ret) {
dprintk(PN544_DRV_NAME ":pn544_probe() : nfc_firm request failed!\n");
goto err_firm;
}
pn544_dev = kzalloc(sizeof(*pn544_dev), GFP_KERNEL);
if (pn544_dev == NULL) {
dev_err(&client->dev,
"failed to allocate memory for module data\n");
ret = -ENOMEM;
goto err_exit;
}
pn544_dev->irq_gpio = platform_data->irq_gpio;
pn544_dev->ven_gpio = platform_data->ven_gpio;
pn544_dev->firm_gpio = platform_data->firm_gpio;
pn544_dev->client = client;
dprintk(PN544_DRV_NAME ":IRQ : %d\nVEN : %d\nFIRM : %d\n",
pn544_dev->irq_gpio, pn544_dev->ven_gpio, pn544_dev->firm_gpio);
pn544_gpio_enable(pn544_dev);
ret = gpio_direction_output(platform_data->ven_gpio,1);
ret = gpio_direction_output(platform_data->firm_gpio,0);
ret = gpio_direction_input(platform_data->irq_gpio);
/* init mutex and queues */
init_waitqueue_head(&pn544_dev->read_wq);
mutex_init(&pn544_dev->read_mutex);
spin_lock_init(&pn544_dev->irq_enabled_lock);
pn544_dev->pn544_device.minor = MISC_DYNAMIC_MINOR;
pn544_dev->pn544_device.name = PN544_DRV_NAME;
pn544_dev->pn544_device.fops = &pn544_dev_fops;
ret = misc_register(&pn544_dev->pn544_device);
if (ret) {
pr_err("%s : misc_register failed\n", __FILE__);
goto err_misc_register;
}
/* 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);
pn544_dev->irq_enabled = true;
ret = request_irq(pn544_gpio_to_irq(pn544_dev), pn544_dev_irq_handler,
IRQF_TRIGGER_HIGH, client->name, pn544_dev);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq_failed;
}
#if !defined(LGE_NFC_HW_QCT_MSM8660)&&!defined(CONFIG_LGE_NFC_HW_QCT_MSM8255)
enable_irq_wake(pn544_get_irq_pin(pn544_dev));
#endif
pn544_disable_irq(pn544_dev);
i2c_set_clientdata(client, pn544_dev);
dprintk(PN544_DRV_NAME ": pn544_probe() end\n");
/*
*/
#ifdef CONFIG_LGE_NFC_MULTICORE_FASTBOOT
{
struct task_struct *th;
th = kthread_create(pn544_factory_standby_set_thread, NULL, "pn544_factory_standby");
if (IS_ERR(th)) {
ret = PTR_ERR(th);
goto err_request_irq_failed;
}
wake_up_process(th);
}
#else
pn544_factory_standby_set();
#endif
/* */
return 0;
err_request_irq_failed:
misc_deregister(&pn544_dev->pn544_device);
err_misc_register:
mutex_destroy(&pn544_dev->read_mutex);
kfree(pn544_dev);
err_firm:
gpio_free(pn544_dev->firm_gpio);
err_ven:
gpio_free(pn544_dev->ven_gpio);
//
err_exit:
pr_err(PN544_DRV_NAME ": pn544_dev is null\n");
pr_err(PN544_DRV_NAME ": pn544_probe() end with error!\n");
return ret;
}
static ssize_t pn544_dev_read(struct file *filp, char __user *buf,
size_t count, loff_t *offset)
{
struct pn544_dev *pn544_dev = filp->private_data;
static char tmp[MAX_BUFFER_SIZE];
int ret;
int irq_gpio_val = 0;
if (count > MAX_BUFFER_SIZE)
count = MAX_BUFFER_SIZE;
pr_debug("%s : reading %zu bytes.\n", __func__, count);
mutex_lock(&pn544_dev->read_mutex);
if (!stReadIntFlag) {
irq_gpio_val = gpio_get_value(pn544_dev->irq_gpio);
dprintk(PN544_DRV_NAME ":IRQ GPIO = %d\n", irq_gpio_val);
if (irq_gpio_val == 0) {
if (filp->f_flags & O_NONBLOCK) {
pr_err(PN544_DRV_NAME ":f_falg has O_NONBLOCK. EAGAIN!\n");
ret = -EAGAIN;
goto fail;
}
pn544_dev->irq_enabled = true;
#ifdef LGE_NFC_READ_IRQ_MODIFY
do_reading=0;//DY_TEST
#endif
//
#if !defined(LGE_NFC_HW_QCT_MSM8660)
enable_irq_wake(pn544_get_irq_pin(pn544_dev));
#endif
enable_irq(pn544_get_irq_pin(pn544_dev));
#ifdef LGE_NFC_READ_IRQ_MODIFY
ret = wait_event_interruptible(pn544_dev->read_wq, do_reading);
#else
ret = wait_event_interruptible(pn544_dev->read_wq,
gpio_get_value(pn544_dev->irq_gpio));
#endif
pn544_disable_irq(pn544_dev);
//dprintk(PN544_DRV_NAME ":wait_event_interruptible : %d\n", ret);
#ifdef LGE_NFC_READ_IRQ_MODIFY
//DY_TEST
if(cancle_read == true)
{
cancle_read = false;
ret = -1;
goto fail;
}
#endif
if (ret)
goto fail;
}
}
/* Read data */
memset(tmp, 0x00, MAX_BUFFER_SIZE);
ret = i2c_master_recv(pn544_dev->client, tmp, count);
mutex_unlock(&pn544_dev->read_mutex);
if (ret < 0) {
pr_err("%s: i2c_master_recv returned %d\n", __func__, ret);
return ret;
}
if (ret > count) {
pr_err("%s: received too many bytes from i2c (%d)\n",
__func__, ret);
return -EIO;
}
if (copy_to_user(buf, tmp, ret)) {
pr_warning("%s : failed to copy to user space\n", __func__);
return -EFAULT;
}
return ret;
fail:
mutex_unlock(&pn544_dev->read_mutex);
return ret;
}
