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;
pr_info(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) {
pr_info(PN547_DRV_NAME ":pn547_probe() : nfc_int request failed!\n");
goto err_int;
}
ret = gpio_request(pn547_dev->ven_gpio, "nfc_ven");
if (ret) {
pr_info(PN547_DRV_NAME ":pn547_probe() : nfc_ven request failed!\n");
goto err_ven;
}
ret = gpio_request(pn547_dev->firm_gpio, "nfc_firm");
if (ret) {
pr_info(PN547_DRV_NAME ":pn547_probe() : nfc_firm request failed!\n");
goto err_firm;
}
pn547_gpio_enable(pn547_dev);
ret = gpio_direction_output(pn547_dev->ven_gpio,0);
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_client, pn547_dev);
#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);
pn547_dev->irq_enabled = true;
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;
}
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;
}
static int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
struct pn547_dev *pn547_dev;
#ifdef FEATURE_PN547_USE_PMIC_CLK
int rc;
#endif
#ifdef FEATURE_PN547_USE_DTREE
struct device_node *np;
np = client->dev.of_node;
if(np == NULL){
pr_err("%s : pn547_probe np\n", __func__);
return -ENODEV;
}
#else
struct pn547_i2c_platform_data *platform_data;
platform_data = client->dev.platform_data;
if (platform_data == NULL) {
pr_err("%s : nfc probe fail\n", __func__);
return -ENODEV;
}
#endif
#ifdef FEATURE_PN547_KERNEL_LOG
pr_info("+-----------------------------------------+\n");
pr_info("| NXP pn547 Driver Probe! |\n");
pr_info("+-----------------------------------------+\n");
#endif
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;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
pr_err("%s : need I2C_FUNC_I2C\n", __func__);
return -ENODEV;
}
#ifdef FEATURE_PN547_USE_DTREE
pn547_dev->irq_gpio = (unsigned int)of_get_named_gpio_flags(np,"nxp,irq-gpio",0,NULL);
pn547_dev->ven_gpio = (unsigned int)of_get_named_gpio_flags(np,"nxp,ven-gpio",0,NULL);
pn547_dev->firm_gpio = (unsigned int)of_get_named_gpio_flags(np,"nxp,firm-gpio",0, NULL);
#else
pn547_dev->irq_gpio = platform_data->irq_gpio;
pn547_dev->ven_gpio = platform_data->ven_gpio;
pn547_dev->firm_gpio = platform_data->firm_gpio;
#endif
pn547_dev->client = client;
pr_info("%s (ven, firm, irq)=(%d, %d, %d)\n", __func__, pn547_dev->ven_gpio, pn547_dev->firm_gpio, pn547_dev->irq_gpio);
ret = gpio_request(pn547_dev->irq_gpio, "nfc_int");
if (ret)
{
pr_err("%s : error : gpio_request nfc_int\n", __func__);
return -ENODEV;
}
ret = gpio_direction_input(pn547_dev->irq_gpio);
if (ret)
{
pr_err("%s : error : gpio_direction_input irq_gpio\n", __func__);
goto err_ven;
}
ret = gpio_request(pn547_dev->ven_gpio, "nfc_ven");
if (ret)
{
pr_err("%s : error : gpio_request nfc_ven\n", __func__);
goto err_ven;
}
#if !defined(FEATURE_PN547_VEN_PMIC_GPIO)
ret = gpio_direction_output(pn547_dev->ven_gpio, 0);
if (ret )
{
pr_err("%s : error : gpio_direction_output ven_gpio\n", __func__);
goto err_firm;
}
#endif
ret = gpio_request(pn547_dev->firm_gpio, "nfc_firm");
if (ret)
{
pr_err("%s : error : gpio_request nfc_firm\n", __func__);
goto err_firm;
}
#if !defined(FEATURE_PN547_FW_DL_PMIC_GPIO)
ret = gpio_direction_output(pn547_dev->firm_gpio, 0);
if (ret )
{
pr_err("%s : error : gpio_direction_output firm_gpio\n", __func__);
goto err_firm_direction;
}
#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);
#if defined(FEATURE_PN547_IRQ_IN_SUSPEND)
wake_lock_init(&pn547_dev->pn547_wake_lock, WAKE_LOCK_SUSPEND, "pn547");
#endif
pn547_dev->pn547_device.minor = MISC_DYNAMIC_MINOR;
pn547_dev->pn547_device.name = "pn547";
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;
}
/* 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);
pn547_dev->irq_enabled = true;
ret = request_irq(client->irq, pn547_dev_irq_handler,
IRQF_TRIGGER_HIGH, client->name, pn547_dev);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq_failed;
}
pn547_disable_irq(pn547_dev);
i2c_set_clientdata(client, pn547_dev);
#ifdef FEATURE_PN547_USE_PMIC_CLK
#ifdef FEATURE_PN547_KERNEL_LOG
pr_info("[%s] device name [%s]\n", __func__,np->name);
pr_info("[%s] device full name [%s]\n", __func__,np->full_name);
#endif
xo_handle_a2 = clk_get_sys(np->name, "xo");
if (IS_ERR(xo_handle_a2))
{
dev_err(&client->dev,"[%s] clk_get err \n", __func__);
}
rc = clk_prepare_enable(xo_handle_a2);
if (rc)
{
dev_err(&client->dev,"[%s] clk_prepare_enable fail rc[%d]\n", __func__, rc);
}
#endif /* FEATURE_PN547_USE_PMIC_CLK */
return 0;
err_request_irq_failed:
misc_deregister(&pn547_dev->pn547_device);
err_misc_register:
mutex_destroy(&pn547_dev->read_mutex);
#if defined(FEATURE_PN547_IRQ_IN_SUSPEND)
wake_lock_destroy(&pn547_dev->pn547_wake_lock);
#endif
#if !defined(FEATURE_PN547_FW_DL_PMIC_GPIO)
err_firm_direction:
#endif
gpio_free(pn547_dev->firm_gpio);
err_firm:
gpio_free(pn547_dev->ven_gpio);
err_ven:
gpio_free(pn547_dev->irq_gpio);
kfree(pn547_dev);
err_exit:
return ret;
}
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
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);
#ifdef CONFIG_LGE_NFC_SET_IRQ_WAKEUP
pn547_enable_irq(pn547_dev);
#endif
spin_lock_irqsave(&pn547_dev->irq_enabled_lock, flags);
//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
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);
#ifdef CONFIG_LGE_NFC_SET_IRQ_WAKEUP
pn547_disable_irq(pn547_dev);
#endif
spin_lock_irqsave(&pn547_dev->irq_enabled_lock, flags);
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();
}
default:
pr_err("%s bad ioctl %d\n", __func__, cmd);
return -EINVAL;
}
return 0;
}
static ssize_t pn547_dev_read(struct file *filp, char __user *buf,
size_t count, loff_t *offset)
{
struct pn547_dev *pn547_dev = filp->private_data;
char tmp[MAX_BUFFER_SIZE];
int ret;
if (count > MAX_BUFFER_SIZE)
count = MAX_BUFFER_SIZE;
pr_debug("%s : reading %zu bytes.\n", __func__, count);
mutex_lock(&pn547_dev->read_mutex);
if (!gpio_get_value(pn547_dev->irq_gpio)) {
if (filp->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
goto fail;
}
pn547_dev->irq_enabled = true;
#ifdef NXP_KR_PENDING_READ
irq_nfc = false;
#endif
enable_irq(pn547_dev->client->irq);
#ifdef NXP_KR_PENDING_READ
ret = wait_event_interruptible(pn547_dev->read_wq, irq_nfc);
if(ret != 0)
{
pr_info("wait_event_interruptible return : %d\n", ret);
}
#else
ret = wait_event_interruptible(pn547_dev->read_wq,
gpio_get_value(pn547_dev->irq_gpio));
#endif
pn547_disable_irq(pn547_dev);
#ifdef NXP_KR_PENDING_READ
if(release_pending == true)
{
release_pending = false;
ret = -1;
goto fail;
}
#endif
if (ret)
goto fail;
}
#ifdef FEATURE_PN547_KERNEL_LOG
pr_info("==> %s #2 (ven, firm, irq)=(%d, %d, %d)\n", __func__, VEN_GET_VALUE(pn547_dev->ven_gpio), FW_DL_GET_VALUE(pn547_dev->firm_gpio), gpio_get_value(pn547_dev->irq_gpio));
#endif
/* Read data */
ret = i2c_master_recv(pn547_dev->client, tmp, count);
mutex_unlock(&pn547_dev->read_mutex);
wake_lock_timeout(&pn547_dev->pn547_wake_lock, 100);
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(&pn547_dev->read_mutex);
return ret;
}
static __devinit int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int irq_gpio = -1;
int updata_gpio = -1;
int ven_gpio = -1;
int irq;
int addr;
int ret;
dev_dbg(&client->dev, "IRQ: %d\n", client->irq);
if(client->dev.of_node)
{
irq_gpio = of_get_named_gpio_flags(client->dev.of_node, "nxp,irq-gpio", 0, NULL);
updata_gpio = of_get_named_gpio_flags(client->dev.of_node, "nxp,updata-gpio", 0, NULL);
ven_gpio = of_get_named_gpio_flags(client->dev.of_node, "nxp,ven-gpio", 0, NULL);
printk("pn547,--irq_gpio---:%d\n", irq_gpio);
printk("pn547,--updata_gpio---:%d\n", updata_gpio);
printk("pn547,--ven_gpio---:%d\n", ven_gpio);
}
irq = client->irq;
addr = client->addr;
if (pn547_dev != NULL) {
dev_warn(&client->dev, "only one PN547 supported.\n");
return -EBUSY;
}
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "%s : need I2C_FUNC_I2C\n", __func__);
return -ENODEV;
}
pn547_dev = kzalloc(sizeof(struct 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_dev->client = client;
pn547_dev->irq_gpio = irq_gpio;
pn547_dev->updata_gpio = updata_gpio;
pn547_dev->ven_gpio = ven_gpio;
pn547_dev->request_resources = pn547_nfc_request_resources;
pn547_dev->free_resources = pn547_nfc_free_resources;
pn547_dev->enable = pn547_nfc_enable;
pn547_dev->disable = pn547_nfc_disable;
pn547_dev->test = pn547_nfc_test;
pn547_dev->irq_status = pn547_pt_irq_status;
/* init mutex and queues */
pn547_dev->read_irq = PN547_NONE;
init_waitqueue_head(&pn547_dev->read_wq);
mutex_init(&pn547_dev->read_mutex);
spin_lock_init(&pn547_dev->irq_enabled_lock);
i2c_set_clientdata(client, pn547_dev);
if (!pn547_dev->request_resources) {
dev_err(&client->dev, "request_resources() missing\n");
ret = -EINVAL;
goto err_request_resources;
}
ret = pn547_dev->request_resources();
if (ret < 0) {
dev_err(&client->dev, "Cannot get platform resources\n");
goto err_request_resources;
}
//enable clk 19.2M
printk("[dsc] enable clk 19.2M\n");
nfc_rf_clk = clk_get(&client->dev, "nfc_rf_clk");
if (nfc_rf_clk != NULL) {
if (clk_prepare_enable(nfc_rf_clk))
pr_err("failed request NFC_CLK.\n");
} else {
pr_err("%s:nfc_rf_clk is null\n",__FUNCTION__);
}
pn547_dev->irq_enabled = true;
ret = request_irq(client->irq, pn547_dev_irq_handler,
IRQF_TRIGGER_HIGH, client->name, pn547_dev);
if(ret){
pr_err("faile to get the irq for nfc-c.\n");
}
/*device_init_wakeup(&client->dev,1);
ret=irq_set_irq_wake(client->irq,1);
if(ret){
pr_err("faile to enable the irq for nfc-c to wake.\n");
}*/
printk("--client->irq:%d,client->name:%s\n", client->irq,client->name);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq;
}
printk("pn547_dev->client->irq:%d\n",pn547_dev->client->irq);
pn547_disable_irq(pn547_dev);
pn547_dev->miscdev.minor = MISC_DYNAMIC_MINOR;
pn547_dev->miscdev.name = PN547_DRIVER_NAME;
pn547_dev->miscdev.fops = &pn547_dev_fops;
pn547_dev->miscdev.parent = &client->dev;
ret = misc_register(&pn547_dev->miscdev);
if (ret){
dev_err(&client->dev, "%s : misc_register failed\n", __func__);
goto err_misc_register;
}
#ifdef ZTEMT_NFC_CONFIG_FB
pn547_dev->fb_notif.notifier_call = PN547_fb_notifier_callback;
ret = fb_register_client(&pn547_dev->fb_notif);
if (ret)
pr_err("%s:Unable to register fb_notifier: %d\n", __func__, ret);
#endif
printk("%s: dev: %p, client %p:dev_name%s\n",__func__, pn547_dev, client,dev_name(&client->dev));
#ifdef NXP_PN547_STANDBY_MODE
set_standby_mode(pn547_dev);
#endif
return 0;
err_misc_register:
free_irq(client->irq, pn547_dev);
err_request_irq:
if (pn547_dev->free_resources)
pn547_dev->free_resources();
err_request_resources:
mutex_destroy(&pn547_dev->read_mutex);
kfree(pn547_dev);
err_exit:
return ret;
}
static ssize_t pn547_dev_read(struct file *filp, char __user *buf,
size_t count, loff_t *offset)
{
//ztemt changed by chengdongsheng 2012.12.20 avoid the filp->private_data was null
//struct pn547_dev *dev = filp->private_data;
struct pn547_dev *dev = pn547_dev;
//ztemt end
struct i2c_client *client = dev->client;
char tmp[MAX_BUFFER_SIZE];
int ret;
if (count > MAX_BUFFER_SIZE)
count = MAX_BUFFER_SIZE;
#ifdef NXP_PN547_DEBUG
printk(KERN_DEBUG "%s: reading %zu bytes.\n", __func__, count);
#endif
mutex_lock(&dev->read_mutex);
if ( !pn547_irq_status(dev) ) {
if (filp->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
goto fail;
}
dev->irq_enabled = true;
enable_irq(dev->client->irq);
ret = wait_event_interruptible(dev->read_wq,
(dev->read_irq == PN547_INT));
pn547_disable_irq(dev);
if (ret)
goto fail;
}
/* Read data */
ret = i2c_master_recv(dev->client, tmp, count);
dev->read_irq = PN547_NONE;
mutex_unlock(&dev->read_mutex);
if (ret < 0) {
dev_err(&client->dev, "%s: i2c_master_recv returned %d\n",
__func__, ret);
return ret;
}
if (ret > count) {
dev_err(&client->dev, "%s: received too many bytes from i2c (%d)\n",
__func__, ret);
return -EIO;
}
#ifdef NXP_PN547_DEBUG
print_hex_dump(KERN_DEBUG, " read: ", DUMP_PREFIX_NONE, 16, 1, tmp, ret, false);
#endif
if (copy_to_user(buf, tmp, ret)) {
dev_err(&client->dev, "%s : failed to copy to user space\n",
__func__);
return -EFAULT;
}
return ret;
fail:
mutex_unlock(&dev->read_mutex);
return ret;
}
static int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0;
int rc = 0;
struct clk *nfc_clk = NULL;
struct pn547_i2c_platform_data *platform_data;
struct pn547_dev *pn547_dev;
printk("### %s begin! \n",__func__);
dev_info(&client->dev, "%s ++\n", __func__);
platform_data = kzalloc(sizeof(struct pn547_i2c_platform_data),
GFP_KERNEL);
if (platform_data == NULL) {
dev_err(&client->dev, "failed to allocate memory\n");
ret = -ENOMEM;
goto err_platform_data;
}
printk("### %s 11 begin! \n",__func__);
ret = pn547_parse_dt(&client->dev, platform_data);
if (ret < 0) {
dev_err(&client->dev, "failed to parse device tree: %d\n", ret);
goto err_parse_dt;
}
printk("pn547 dev kobj_name=%s,init_name=%s,id=%d\n",client->dev.kobj.name,client->dev.init_name, client->dev.id);
nfc_clk = clk_get(&client->dev, "nfc_pn547clk");
if (nfc_clk == NULL) {
dev_err(&client->dev, "failed to get clk: %d\n", ret);
goto err_parse_dt;
}
rc = clk_set_rate(nfc_clk,19200000);
if(rc){
dev_err(&client->dev, "Clock set rate failed: %d\n",rc);
}
ret = clk_prepare_enable(nfc_clk);
if (ret) {
dev_err(&client->dev, "failed to enable clk: %d\n", ret);
goto err_parse_dt;
}
ret = pn547_gpio_request(&client->dev, platform_data);
if (ret) {
dev_err(&client->dev, "failed to request gpio\n");
goto err_gpio_request;
}
dev_dbg(&client->dev, "%s:\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "%s: i2c check failed\n", __func__);
ret = -ENODEV;
goto err_i2c;
}
printk("### %s 22 begin! \n",__func__);
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;
}
client->irq = gpio_to_irq(platform_data->irq_gpio);
pn547_dev->irq_gpio = platform_data->irq_gpio;
pn547_dev->ven_gpio = platform_data->ven_gpio;
pn547_dev->firm_gpio = platform_data->fwdl_en_gpio;
pn547_dev->clk_req_gpio = platform_data->clk_req_gpio;
pn547_dev->client = client;
pn547_dev->dev = &client->dev;
pn547_dev->do_reading = 0;
/* Initialise mutex and work queue */
init_waitqueue_head(&pn547_dev->read_wq);
mutex_init(&pn547_dev->read_mutex);
spin_lock_init(&pn547_dev->irq_enabled_lock);
wake_lock_init(&pn547_dev->wl,WAKE_LOCK_SUSPEND,"nfc_locker");
pn547_dev->pn547_device.minor = MISC_DYNAMIC_MINOR;
pn547_dev->pn547_device.name = "pn544";
pn547_dev->pn547_device.fops = &pn547_dev_fops;
printk("### %s 33 begin! \n",__func__);
ret = misc_register(&pn547_dev->pn547_device);
if (ret) {
dev_err(&client->dev, "%s: misc_register err %d\n",
__func__, ret);
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.
*/
dev_info(&client->dev, "%s : requesting IRQ %d\n",
__func__, client->irq);
pn547_dev->irq_enabled = true;
ret = request_irq(client->irq, pn547_dev_irq_handler,
IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND | IRQF_ONESHOT,
client->name, pn547_dev);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq_failed;
}
pn547_disable_irq(pn547_dev);
i2c_set_clientdata(client, pn547_dev);
return 0;
err_request_irq_failed:
misc_deregister(&pn547_dev->pn547_device);
err_misc_register:
mutex_destroy(&pn547_dev->read_mutex);
kfree(pn547_dev);
err_exit:
err_i2c:
pn547_gpio_release(platform_data);
err_gpio_request:
err_parse_dt:
kfree(platform_data);
err_platform_data:
dev_err(&client->dev, "%s: err %d\n", __func__, ret);
return ret;
}
static ssize_t pn547_dev_read(struct file *filp, char __user *buf,
size_t count, loff_t *offset)
{
struct pn547_dev *pn547_dev = filp->private_data;
char tmp[MAX_BUFFER_SIZE];
int ret;
//pr_info("%s ++ \n", __func__);
if (count > MAX_BUFFER_SIZE)
count = MAX_BUFFER_SIZE;
//pr_info("%s : read request for %zu bytes.\n", __func__, count);
/* not add wake lock in the dev read function */
//wake_lock(&pn547_dev->wl);
mutex_lock(&pn547_dev->read_mutex);
if (!gpio_get_value(pn547_dev->irq_gpio)) {
if (filp->f_flags & O_NONBLOCK) {
ret = -EAGAIN;
goto fail;
}
//pr_info("Waiting for PN547 IRQ.\n");
pn547_dev->irq_enabled = true;
pn547_dev->do_reading = 0;
enable_irq(pn547_dev->client->irq);
ret = wait_event_interruptible(pn547_dev->read_wq,
pn547_dev->do_reading);
pn547_disable_irq(pn547_dev);
//pr_info("PN547 IRQ high.\n");
if (pn547_dev->cancel_read) {
pn547_dev->cancel_read = false;
ret = -1;
goto fail;
}
if (ret)
goto fail;
}
//mutex_lock(&pn547_dev->read_mutex);
/* Read data */
ret = i2c_master_recv(pn547_dev->client, tmp, count);
mutex_unlock(&pn547_dev->read_mutex);
//wake_unlock(&pn547_dev->wl);
//pr_info("%s : i2c read %zu bytes. status : %d\n", __func__, count, ret);
if (ret < 0) {
pr_err("%s: PN547 i2c_master_recv returned %d\n", __func__, ret);
//mutex_unlock(&pn547_dev->read_mutex);
return ret;
}
if (ret > count) {
pr_err("%s: received too many bytes from i2c (%d)\n",
__func__, ret);
//mutex_unlock(&pn547_dev->read_mutex);
return -EIO;
}
if (copy_to_user(buf, tmp, ret)) {
pr_warning("%s : failed to copy to user space\n", __func__);
//mutex_unlock(&pn547_dev->read_mutex);
return -EFAULT;
}
//mutex_unlock(&pn547_dev->read_mutex);
return ret;
fail:
mutex_unlock(&pn547_dev->read_mutex);
//wake_unlock(&pn547_dev->wl);
pr_err("%s : goto fail, and ret : %d \n", __func__,ret);
return ret;
}
