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android_kernel_samsung_msm8976/drivers/nfc/pn547.c

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/*
* Copyright (C) 2010 Trusted Logic S.A.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/i2c.h>
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/jiffies.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/miscdevice.h>
#include <linux/spinlock.h>
#include <linux/pn547.h>
#include <linux/wakelock.h>
#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#ifdef CONFIG_NFC_PN547_8916_USE_BBCLK2
#include <linux/clk.h>
#endif
#include <asm/siginfo.h>
#include <linux/rcupdate.h>
#include <linux/sched.h>
#include <linux/signal.h>
#define SIG_NFC 44
#define MAX_BUFFER_SIZE 512
#define MAX_TRY_I2C_READ 10
#define I2C_ADDR_READ_L 0x51
#define I2C_ADDR_READ_H 0x57
#define NFC_DEBUG 0
struct pn547_dev {
wait_queue_head_t read_wq;
struct mutex read_mutex;
struct i2c_client *client;
struct miscdevice pn547_device;
void (*conf_gpio) (void);
unsigned int ven_gpio;
unsigned int firm_gpio;
unsigned int irq_gpio;
#ifdef CONFIG_NFC_PN547_PVDD_EN_CONTROL
unsigned int pvdd_en;
#endif
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
unsigned int nfc_enable;
#endif
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
unsigned int ese_pwr_req;
struct mutex p61_state_mutex; /* used to make p61_current_state flag secure */
p61_access_state_t p61_current_state; /* stores the current P61 state */
bool nfc_ven_enabled; /* stores the VEN pin state powered by Nfc */
bool spi_ven_enabled; /* stores the VEN pin state powered by Spi */
#endif
atomic_t irq_enabled;
atomic_t read_flag;
bool cancel_read;
struct wake_lock nfc_wake_lock;
#ifdef CONFIG_NFC_PN547_8916_USE_BBCLK2
struct clk *nfc_clock;
#endif
#ifdef CONFIG_NFC_PN547_LDO_CONTROL
struct regulator *L16;
#endif
long nfc_service_pid; /*used to signal the nfc the nfc service */
};
static struct pn547_dev *pn547_dev;
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
static struct semaphore ese_access_sema;
static void release_ese_lock(p61_access_state_t p61_current_state);
static struct semaphore svdd_sync_onoff_sema;
int get_ese_lock(p61_access_state_t p61_current_state, int timeout);
#endif
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
#define PN547_NFC_GET_INFO(dev) i2c_get_clientdata(to_i2c_client(dev))
#endif
#ifdef CONFIG_NFC_PN547_LDO_CONTROL
int nfc_power_onoff(struct pn547_dev *data, bool onoff);
#endif
static irqreturn_t pn547_dev_irq_handler(int irq, void *dev_id)
{
struct pn547_dev *pn547_dev = dev_id;
if (!gpio_get_value(pn547_dev->irq_gpio)) {
#if NFC_DEBUG
pr_err("%s, irq_gpio = %d\n", __func__,
gpio_get_value(pn547_dev->irq_gpio));
#endif
return IRQ_HANDLED;
}
/* Wake up waiting readers */
atomic_set(&pn547_dev->read_flag, 1);
wake_up(&pn547_dev->read_wq);
#if NFC_DEBUG
pr_info("pn547 : call\n");
#endif
wake_lock_timeout(&pn547_dev->nfc_wake_lock, 2*HZ);
return IRQ_HANDLED;
}
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] = {0, };
int ret = 0;
#ifdef CONFIG_NFC_PN544
int readingWatchdog = 0;
#endif
if (count > MAX_BUFFER_SIZE)
count = MAX_BUFFER_SIZE;
pr_debug("%s : reading %zu bytes. irq=%s\n", __func__, count,
gpio_get_value(pn547_dev->irq_gpio) ? "1" : "0");
#if NFC_DEBUG
pr_info("pn547 : + r\n");
#endif
mutex_lock(&pn547_dev->read_mutex);
#ifdef CONFIG_NFC_PN544
wait_irq:
#endif
if (!gpio_get_value(pn547_dev->irq_gpio)) {
atomic_set(&pn547_dev->read_flag, 0);
if (filp->f_flags & O_NONBLOCK) {
pr_info("%s : O_NONBLOCK\n", __func__);
ret = -EAGAIN;
goto fail;
}
#if NFC_DEBUG
pr_info("pn547: wait_event_interruptible : in\n");
#endif
if (!gpio_get_value(pn547_dev->irq_gpio))
ret = wait_event_interruptible(pn547_dev->read_wq,
atomic_read(&pn547_dev->read_flag));
#if NFC_DEBUG
pr_info("pn547 : h\n");
#endif
if (pn547_dev->cancel_read) {
pn547_dev->cancel_read = false;
ret = -1;
goto fail;
}
if (ret)
goto fail;
}
/* Read data */
ret = i2c_master_recv(pn547_dev->client, tmp, count);
#ifdef CONFIG_NFC_PN544
/* If bad frame(from 0x51 to 0x57) is received from pn65n,
* we need to read again after waiting that IRQ is down.
* if data is not ready, pn65n will send from 0x51 to 0x57. */
if ((I2C_ADDR_READ_L <= tmp[0] && tmp[0] <= I2C_ADDR_READ_H)
&& readingWatchdog < MAX_TRY_I2C_READ) {
pr_warn("%s: data is not ready yet.data = 0x%x, cnt=%d\n",
__func__, tmp[0], readingWatchdog);
usleep_range(2000, 2000); /* sleep 2ms to wait for IRQ */
readingWatchdog++;
goto wait_irq;
}
#endif
#if NFC_DEBUG
pr_info("pn547: i2c_master_recv\n");
#endif
mutex_unlock(&pn547_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_err("%s : failed to copy to user space\n", __func__);
return -EFAULT;
}
return ret;
fail:
mutex_unlock(&pn547_dev->read_mutex);
return ret;
}
static ssize_t pn547_dev_write(struct file *filp, const char __user *buf,
size_t count, loff_t *offset)
{
struct pn547_dev *pn547_dev;
char tmp[MAX_BUFFER_SIZE] = {0, };
int ret = 0, retry = 2;
pn547_dev = filp->private_data;
#if NFC_DEBUG
pr_info("pn547 : + w\n");
#endif
if (count > MAX_BUFFER_SIZE)
count = MAX_BUFFER_SIZE;
if (copy_from_user(tmp, buf, count)) {
pr_err("%s : failed to copy from user space\n", __func__);
return -EFAULT;
}
pr_debug("%s : writing %zu bytes.\n", __func__, count);
/* Write data */
do {
retry--;
ret = i2c_master_send(pn547_dev->client, tmp, count);
if (ret == count)
break;
usleep_range(6000, 10000); /* Retry, chip was in standby */
#if NFC_DEBUG
pr_debug("%s : retry = %d\n", __func__, retry);
#endif
} while (retry);
#if NFC_DEBUG
pr_info("pn547 : - w\n");
#endif
if (ret != count) {
pr_err("%s : i2c_master_send returned %d\n", __func__, ret);
ret = -EIO;
}
return ret;
}
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
static void p61_update_access_state(struct pn547_dev *pn547_dev, p61_access_state_t current_state, bool set)
{
pr_info("%s: Enter current_state = 0x%x\n", __func__, pn547_dev->p61_current_state);
if (current_state)
{
if(set){
if(pn547_dev->p61_current_state == P61_STATE_IDLE)
pn547_dev->p61_current_state = P61_STATE_INVALID;
pn547_dev->p61_current_state |= current_state;
}
else{
pn547_dev->p61_current_state ^= current_state;
if(!pn547_dev->p61_current_state)
pn547_dev->p61_current_state = P61_STATE_IDLE;
}
}
pr_info("%s: Exit current_state = 0x%x\n", __func__, pn547_dev->p61_current_state);
}
static void p61_get_access_state(struct pn547_dev *pn547_dev, p61_access_state_t *current_state)
{
if (current_state == NULL) {
pr_err("%s : invalid state of p61_access_state_t current state \n", __func__);
} else {
*current_state = pn547_dev->p61_current_state;
}
}
static void p61_access_lock(struct pn547_dev *pn547_dev)
{
pr_info("%s: Enter\n", __func__);
mutex_lock(&pn547_dev->p61_state_mutex);
pr_info("%s: Exit\n", __func__);
}
static void p61_access_unlock(struct pn547_dev *pn547_dev)
{
pr_info("%s: Enter\n", __func__);
mutex_unlock(&pn547_dev->p61_state_mutex);
pr_info("%s: Exit\n", __func__);
}
static int signal_handler(p61_access_state_t state, long nfc_pid)
{
struct siginfo sinfo;
pid_t pid;
struct task_struct *task;
int sigret = 0;
int ret = 0;
pr_info("%s: Enter\n", __func__);
memset(&sinfo, 0, sizeof(struct siginfo));
sinfo.si_signo = SIG_NFC;
sinfo.si_code = SI_QUEUE;
sinfo.si_int = state;
pid = nfc_pid;
task = pid_task(find_vpid(pid), PIDTYPE_PID);
if(task)
{
pr_info("%s.\n", task->comm);
sigret = send_sig_info(SIG_NFC, &sinfo, task);
if(sigret < 0){
pr_info("send_sig_info failed..... sigret %d.\n", sigret);
ret = -1;
}
}
else{
pr_info("finding task from PID failed\r\n");
ret = -1;
}
pr_info("%s: Exit\n", __func__);
return ret;
}
static void svdd_sync_onoff(long nfc_service_pid, p61_access_state_t origin)
{
int timeout = 100; //100 ms timeout
unsigned long tempJ = msecs_to_jiffies(timeout);
pr_info("%s: Enter nfc_service_pid: %ld\n", __func__, nfc_service_pid);
if(nfc_service_pid)
{
if (0 == signal_handler(origin, nfc_service_pid))
{
sema_init(&svdd_sync_onoff_sema, 0);
pr_info("Waiting for svdd protection response");
if(down_timeout(&svdd_sync_onoff_sema, tempJ) != 0)
{
pr_info("svdd wait protection: Timeout");
}
pr_info("svdd wait protection : released");
}
}
pr_info("%s: Exit\n", __func__);
}
static int release_svdd_wait(void)
{
pr_info("%s: Enter \n", __func__);
up(&svdd_sync_onoff_sema);
pr_info("%s: Exit\n", __func__);
return 0;
}
#endif
static int pn547_dev_open(struct inode *inode, struct file *filp)
{
struct pn547_dev *pn547_dev = container_of(filp->private_data,
struct pn547_dev,
pn547_device);
filp->private_data = pn547_dev;
pr_debug("%s : %d,%d\n", __func__, imajor(inode), iminor(inode));
return 0;
}
long pn547_dev_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
/*struct pn547_dev *pn547_dev = filp->private_data;*/
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
if (cmd == P547_GET_ESE_ACCESS)
{
return get_ese_lock(P61_STATE_WIRED, arg);
}
else if(cmd == P547_REL_SVDD_WAIT)
{
return release_svdd_wait();
}
p61_access_lock(pn547_dev);
pr_info("%s :enter cmd = %u, arg = %ld\n", __func__, cmd, arg);
switch (cmd) {
case PN547_SET_PWR:
{
p61_access_state_t current_state = P61_STATE_INVALID;
p61_get_access_state(pn547_dev, &current_state);
if (arg == 2) {
if (current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO))
{
/* NFCC fw/download should not be allowed if p61 is used
* by SPI
*/
pr_info("%s NFCC should not be allowed to reset/FW download \n", __func__);
p61_access_unlock(pn547_dev);
return -EBUSY; /* Device or resource busy */
}
pn547_dev->nfc_ven_enabled = true;
if (pn547_dev->spi_ven_enabled == false)
{
/* power on with firmware download (requires hw reset)
*/
#ifdef CONFIG_SEC_MILLETWIFI_COMMON
gpio_direction_output(pn547_dev->ven_gpio, 1);
#endif
p61_update_access_state(pn547_dev, P61_STATE_DWNLD, true);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 1);
gpio_set_value(pn547_dev->firm_gpio, 1);
usleep_range(4900, 5000);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 0);
usleep_range(4900, 5000);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 1);
usleep_range(4900, 5000);
if (atomic_read(&pn547_dev->irq_enabled) == 0) {
atomic_set(&pn547_dev->irq_enabled, 1);
enable_irq(pn547_dev->client->irq);
enable_irq_wake(pn547_dev->client->irq);
}
pr_info("%s power on with firmware, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
pr_info("VEN=%d FIRM=%d\n", gpio_get_value(pn547_dev->ven_gpio), gpio_get_value(pn547_dev->firm_gpio));
}
} else if (arg == 1) {
/* power on */
if (pn547_dev->conf_gpio)
pn547_dev->conf_gpio();
if ((current_state & (P61_STATE_WIRED|P61_STATE_SPI|P61_STATE_SPI_PRIO))== 0){
p61_update_access_state(pn547_dev, P61_STATE_IDLE, true);
}
gpio_set_value(pn547_dev->firm_gpio, 0);
pn547_dev->nfc_ven_enabled = true;
if (pn547_dev->spi_ven_enabled == false) {
#ifdef CONFIG_SEC_MILLETWIFI_COMMON
gpio_direction_output(pn547_dev->ven_gpio, 1);
#endif
gpio_set_value_cansleep(pn547_dev->ven_gpio, 1);
}
usleep_range(4900, 5000);
if (atomic_read(&pn547_dev->irq_enabled) == 0) {
atomic_set(&pn547_dev->irq_enabled, 1);
enable_irq(pn547_dev->client->irq);
enable_irq_wake(pn547_dev->client->irq);
}
pr_info("%s power on, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
} else if (arg == 0) {
/* power off */
if (atomic_read(&pn547_dev->irq_enabled) == 1) {
atomic_set(&pn547_dev->irq_enabled, 0);
disable_irq_wake(pn547_dev->client->irq);
disable_irq_nosync(pn547_dev->client->irq);
}
if(current_state & P61_STATE_DWNLD)
p61_update_access_state(pn547_dev, P61_STATE_DWNLD, false);
if ((current_state & (P61_STATE_WIRED|P61_STATE_SPI|P61_STATE_SPI_PRIO))== 0){
p61_update_access_state(pn547_dev, P61_STATE_IDLE, true);
}
pr_info("%s power off, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
gpio_set_value(pn547_dev->firm_gpio, 0);
pn547_dev->nfc_ven_enabled = false;
/* Don't change Ven state if spi made it high */
if (pn547_dev->spi_ven_enabled == false) {
#ifdef CONFIG_SEC_MILLETWIFI_COMMON
gpio_direction_output(pn547_dev->ven_gpio, 0);
#endif
gpio_set_value_cansleep(pn547_dev->ven_gpio, 0);
}
usleep_range(4900, 5000);
} else if (arg == 3) {
pr_info("%s Read Cancel\n", __func__);
pn547_dev->cancel_read = true;
atomic_set(&pn547_dev->read_flag, 1);
wake_up(&pn547_dev->read_wq);
} else {
pr_err("%s bad arg %lu\n", __func__, arg);
/* changed the p61 state to idle*/
p61_access_unlock(pn547_dev);
return -EINVAL;
}
}
break;
case P61_SET_SPI_PWR:
{
p61_access_state_t current_state = P61_STATE_INVALID;
p61_get_access_state(pn547_dev, &current_state);
if (arg == 1) {
pr_info("%s : PN61_SET_SPI_PWR - power on ese\n", __func__);
if ((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO|P61_STATE_DWNLD)) == 0)
{
p61_update_access_state(pn547_dev, P61_STATE_SPI, true);
/*To handle triple mode protection signal
NFC service when SPI session started*/
if (current_state & P61_STATE_WIRED){
if(pn547_dev->nfc_service_pid){
pr_info("nfc service pid %s ---- %ld", __func__, pn547_dev->nfc_service_pid);
signal_handler(P61_STATE_SPI, pn547_dev->nfc_service_pid);
}
else{
pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn547_dev->nfc_service_pid);
}
}
pn547_dev->spi_ven_enabled = true;
if (pn547_dev->nfc_ven_enabled == false) {
/* provide power to NFCC if, NFC service not provided */
gpio_set_value(pn547_dev->ven_gpio, 1);
msleep(10);
}
/* pull the gpio to high once NFCC is power on*/
gpio_set_value(pn547_dev->ese_pwr_req, 1);
msleep(10);
} else {
pr_info("%s : PN61_SET_SPI_PWR - power on ese failed \n", __func__);
p61_access_unlock(pn547_dev);
return -EBUSY; /* Device or resource busy */
}
} else if (arg == 0) {
pr_info("%s : PN61_SET_SPI_PWR - power off ese\n", __func__);
if(current_state & P61_STATE_SPI_PRIO){
p61_update_access_state(pn547_dev, P61_STATE_SPI_PRIO, false);
if (current_state & P61_STATE_WIRED)
{
if(pn547_dev->nfc_service_pid){
pr_info("nfc service pid %s ---- %ld", __func__, pn547_dev->nfc_service_pid);
signal_handler(P61_STATE_SPI_PRIO_END, pn547_dev->nfc_service_pid);
}else{
pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn547_dev->nfc_service_pid);
}
}
if (!(current_state & P61_STATE_WIRED)) {
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START);
gpio_set_value(pn547_dev->ese_pwr_req, 0);
msleep(60);
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END);
}
pn547_dev->spi_ven_enabled = false;
if (pn547_dev->nfc_ven_enabled == false) {
gpio_set_value(pn547_dev->ven_gpio, 0);
msleep(10);
}
}
else if(current_state & P61_STATE_SPI){
p61_update_access_state(pn547_dev, P61_STATE_SPI, false);
if (!(current_state & P61_STATE_WIRED))
{
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START);
gpio_set_value(pn547_dev->ese_pwr_req, 0);
msleep(60);
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END);
}
/*If JCOP3.2 or 3.3 for handling triple mode protection signal NFC service */
else
{
if (current_state & P61_STATE_WIRED)
{
if(pn547_dev->nfc_service_pid){
pr_info("nfc service pid %s ---- %ld", __func__, pn547_dev->nfc_service_pid);
signal_handler(P61_STATE_SPI_END, pn547_dev->nfc_service_pid);
}
else{
pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn547_dev->nfc_service_pid);
}
}
}
pn547_dev->spi_ven_enabled = false;
if (pn547_dev->nfc_ven_enabled == false) {
gpio_set_value(pn547_dev->ven_gpio, 0);
msleep(10);
}
} else {
pr_err("%s : PN61_SET_SPI_PWR - failed, current_state = %x \n",
__func__, pn547_dev->p61_current_state);
p61_access_unlock(pn547_dev);
return -EPERM; /* Operation not permitted */
}
}else if (arg == 2) {
pr_info("%s : PN61_SET_SPI_PWR - reset\n", __func__);
if (current_state & (P61_STATE_IDLE|P61_STATE_SPI|P61_STATE_SPI_PRIO)) {
if (pn547_dev->spi_ven_enabled == false)
{
pn547_dev->spi_ven_enabled = true;
if (pn547_dev->nfc_ven_enabled == false) {
/* provide power to NFCC if, NFC service not provided */
gpio_set_value(pn547_dev->ven_gpio, 1);
msleep(10);
}
}
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START);
gpio_set_value(pn547_dev->ese_pwr_req, 0);
msleep(60);
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END);
gpio_set_value(pn547_dev->ese_pwr_req, 1);
msleep(10);
} else {
pr_info("%s : PN61_SET_SPI_PWR - reset failed \n", __func__);
p61_access_unlock(pn547_dev);
return -EBUSY; /* Device or resource busy */
}
}
else if (arg == 3) {
pr_info("%s : PN61_SET_SPI_PWR - Prio Session Start power on ese\n", __func__);
if ((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO|P61_STATE_DWNLD)) == 0) {
p61_update_access_state(pn547_dev, P61_STATE_SPI_PRIO, true);
if (current_state & P61_STATE_WIRED){
if(pn547_dev->nfc_service_pid){
pr_info("nfc service pid %s ---- %ld", __func__, pn547_dev->nfc_service_pid);
signal_handler(P61_STATE_SPI_PRIO, pn547_dev->nfc_service_pid);
}
else{
pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn547_dev->nfc_service_pid);
}
}
pn547_dev->spi_ven_enabled = true;
if (pn547_dev->nfc_ven_enabled == false) {
/* provide power to NFCC if, NFC service not provided */
gpio_set_value(pn547_dev->ven_gpio, 1);
msleep(10);
}
/* pull the gpio to high once NFCC is power on*/
gpio_set_value(pn547_dev->ese_pwr_req, 1);
msleep(10);
}else {
pr_info("%s : Prio Session Start power on ese failed 0x%x\n", __func__, current_state);
p61_access_unlock(pn547_dev);
return -EBUSY; /* Device or resource busy */
}
}else if (arg == 4) {
if (current_state & P61_STATE_SPI_PRIO)
{
pr_info("%s : PN61_SET_SPI_PWR - Prio Session Ending...\n", __func__);
p61_update_access_state(pn547_dev, P61_STATE_SPI_PRIO, false);
/*after SPI prio timeout, the state is changing from SPI prio to SPI */
p61_update_access_state(pn547_dev, P61_STATE_SPI, true);
if (current_state & P61_STATE_WIRED)
{
if(pn547_dev->nfc_service_pid){
pr_info("nfc service pid %s ---- %ld", __func__, pn547_dev->nfc_service_pid);
signal_handler(P61_STATE_SPI_PRIO_END, pn547_dev->nfc_service_pid);
}
else{
pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn547_dev->nfc_service_pid);
}
}
}
else
{
pr_info("%s : PN61_SET_SPI_PWR - Prio Session End failed 0x%x\n", __func__, current_state);
p61_access_unlock(pn547_dev);
return -EBADRQC; /* Device or resource busy */
}
} else if(arg == 5){
release_ese_lock(P61_STATE_SPI);
}
else {
pr_info("%s bad ese pwr arg %lu\n", __func__, arg);
p61_access_unlock(pn547_dev);
return -EBADRQC; /* Invalid request code */
}
}
break;
case P61_GET_PWR_STATUS:
{
p61_access_state_t current_state = P61_STATE_INVALID;
p61_get_access_state(pn547_dev, &current_state);
pr_info("%s: P61_GET_PWR_STATUS = %x",__func__, current_state);
put_user(current_state, (int __user *)arg);
}
break;
case P61_SET_WIRED_ACCESS:
{
p61_access_state_t current_state = P61_STATE_INVALID;
p61_get_access_state(pn547_dev, &current_state);
if (arg == 1) {
if (current_state)
{
pr_info("%s : P61_SET_WIRED_ACCESS - enabling\n", __func__);
p61_update_access_state(pn547_dev, P61_STATE_WIRED, true);
if (current_state & P61_STATE_SPI_PRIO)
{
if(pn547_dev->nfc_service_pid){
pr_info("nfc service pid %s ---- %ld", __func__, pn547_dev->nfc_service_pid);
signal_handler(P61_STATE_SPI_PRIO, pn547_dev->nfc_service_pid);
}
else{
pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn547_dev->nfc_service_pid);
}
}
if((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0)
{
gpio_set_value(pn547_dev->ese_pwr_req, 1);
msleep(10);
}
} else {
pr_info("%s : P61_SET_WIRED_ACCESS - enabling failed \n", __func__);
p61_access_unlock(pn547_dev);
return -EBUSY; /* Device or resource busy */
}
} else if (arg == 0) {
pr_info("%s : P61_SET_WIRED_ACCESS - disabling \n", __func__);
if (current_state & P61_STATE_WIRED){
p61_update_access_state(pn547_dev, P61_STATE_WIRED, false);
if((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0) {
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_DWP_SVDD_SYNC_START);
gpio_set_value(pn547_dev->ese_pwr_req, 0);
msleep(60);
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_DWP_SVDD_SYNC_END);
}
} else {
pr_err("%s : P61_SET_WIRED_ACCESS - failed, current_state = %x \n",
__func__, pn547_dev->p61_current_state);
p61_access_unlock(pn547_dev);
return -EPERM; /* Operation not permitted */
}
}
else if(arg == 2)
{
pr_info("%s : P61_ESE_GPIO_LOW \n", __func__);
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_DWP_SVDD_SYNC_START);
gpio_set_value(pn547_dev->ese_pwr_req, 0);
msleep(60);
svdd_sync_onoff(pn547_dev->nfc_service_pid, P61_STATE_DWP_SVDD_SYNC_END);
}
else if(arg == 3)
{
pr_info("%s : P61_ESE_GPIO_HIGH \n", __func__);
gpio_set_value(pn547_dev->ese_pwr_req, 1);
msleep(10);
}
else if(arg == 4)
{
release_ese_lock(P61_STATE_WIRED);
}
else {
pr_info("%s P61_SET_WIRED_ACCESS - bad arg %lu\n", __func__, arg);
p61_access_unlock(pn547_dev);
return -EBADRQC; /* Invalid request code */
}
}
break;
case P547_SET_NFC_SERVICE_PID:
{
pr_info("%s : The NFC Service PID is %ld\n", __func__, arg);
pn547_dev->nfc_service_pid = arg;
}
break;
default:
pr_err("%s bad ioctl %u\n", __func__, cmd);
p61_access_unlock(pn547_dev);
pr_info("%s :exit cmd = %u, arg = %ld\n", __func__, cmd, arg);
return -EINVAL;
}
p61_access_unlock(pn547_dev);
#else /*CONFIG_NFC_PN547_ESE_SUPPORT*/
switch (cmd) {
case PN547_SET_PWR:
if (arg == 2) {
/* power on with firmware download (requires hw reset)
*/
gpio_set_value_cansleep(pn547_dev->ven_gpio, 1);
gpio_set_value(pn547_dev->firm_gpio, 1);
usleep_range(4900, 5000);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 0);
usleep_range(4900, 5000);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 1);
usleep_range(4900, 5000);
if (atomic_read(&pn547_dev->irq_enabled) == 0) {
atomic_set(&pn547_dev->irq_enabled, 1);
enable_irq(pn547_dev->client->irq);
enable_irq_wake(pn547_dev->client->irq);
}
pr_info("%s power on with firmware, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
pn547_dev->nfc_enable = 1;
if (IS_ERR(pn547_dev->nfc_clock)) {
pr_err("[NFC] %s: Couldn't get D1)\n",
__func__);
} else {
//clk_put(pn547_dev->nfc_clock);
pr_info("%s power set and clk_prepare_enable\n", __func__);
if (clk_prepare_enable(pn547_dev->nfc_clock))
pr_err("[NFC] %s: Couldn't prepare D1\n",
__func__);
}
#endif
} else if (arg == 1) {
/* power on */
if (pn547_dev->conf_gpio)
pn547_dev->conf_gpio();
gpio_set_value(pn547_dev->firm_gpio, 0);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 1);
usleep_range(4900, 5000);
if (atomic_read(&pn547_dev->irq_enabled) == 0) {
atomic_set(&pn547_dev->irq_enabled, 1);
enable_irq(pn547_dev->client->irq);
enable_irq_wake(pn547_dev->client->irq);
}
pr_info("%s power on, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
pn547_dev->nfc_enable = 1;
if (IS_ERR(pn547_dev->nfc_clock)) {
pr_err("[NFC] %s: Couldn't get D1)\n",
__func__);
} else {
//clk_put(pn547_dev->nfc_clock);
pr_info("%s power on and clk_prepare_enable\n", __func__);
if (clk_prepare_enable(pn547_dev->nfc_clock))
pr_err("[NFC] %s: Couldn't prepare D1\n",
__func__);
}
#endif
} else if (arg == 0) {
/* power off */
if (atomic_read(&pn547_dev->irq_enabled) == 1) {
atomic_set(&pn547_dev->irq_enabled, 0);
disable_irq_wake(pn547_dev->client->irq);
disable_irq_nosync(pn547_dev->client->irq);
}
pr_info("%s power off, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
gpio_set_value(pn547_dev->firm_gpio, 0);
gpio_set_value_cansleep(pn547_dev->ven_gpio, 0);
usleep_range(10000, 10050);
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
pn547_dev->nfc_enable = 0;
if(pn547_dev->nfc_clock)
{
clk_disable_unprepare(pn547_dev->nfc_clock);
pr_info("%s power off and clk_disable_unprepare\n", __func__);
}
#endif
} else if (arg == 3) {
pr_info("%s Read Cancel\n", __func__);
pn547_dev->cancel_read = true;
atomic_set(&pn547_dev->read_flag, 1);
wake_up(&pn547_dev->read_wq);
} else {
pr_err("%s bad arg %lu\n", __func__, arg);
return -EINVAL;
}
break;
default:
pr_err("%s bad ioctl %u\n", __func__, cmd);
return -EINVAL;
}
#endif /*CONFIG_NFC_PN547_ESE_SUPPORT*/
return 0;
}
EXPORT_SYMBOL(pn547_dev_ioctl);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
int get_ese_lock(p61_access_state_t p61_current_state, int timeout)
{
unsigned long tempJ = msecs_to_jiffies(timeout);
pr_info("get_ese_lock: enter p61_current_state = %d, timeout = %d, jiffies = %lu\n"
, p61_current_state, timeout, tempJ);
if(down_timeout(&ese_access_sema, tempJ) != 0)
{
pr_err("get_ese_lock: timeout p61_current_state = %d\n", p61_current_state);
return -EBUSY;
}
pr_info("get_ese_lock: exit p61_current_state = %d, timeout = %d\n"
, p61_current_state, timeout);
return 0;
}
EXPORT_SYMBOL(get_ese_lock);
static void release_ese_lock(p61_access_state_t p61_current_state)
{
pr_info("release_ese_lock: enter p61_current_state = %d", p61_current_state);
up(&ese_access_sema);
pr_info("release_ese_lock: exit");
}
#endif
static const struct file_operations pn547_dev_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = pn547_dev_read,
.write = pn547_dev_write,
.open = pn547_dev_open,
.unlocked_ioctl = pn547_dev_ioctl,
};
#ifdef CONFIG_NFC_PN547_LDO_CONTROL
int nfc_power_onoff(struct pn547_dev *data, bool onoff)
{
int ret = -1;
data->L16 = devm_regulator_get(&data->client->dev, "nfc_ldo");
if (IS_ERR(data->L16)) {
pr_err("[NFC] %s: regulator pointer null nfc_ldo, rc=%d\n",
__func__, ret);
return PTR_ERR(data->L16);
}
ret = regulator_set_voltage(data->L16, 1800000, 1800000);
if (ret) {
pr_err("[NFC] %s: set voltage failed on nfc_ldo, rc=%d\n",
__func__, ret);
return ret;
}
if (onoff) {
ret = regulator_enable(data->L16);
regulator_set_mode(data->L16, REGULATOR_MODE_NORMAL);
if (ret) {
pr_err("[NFC] %s: Failed to enable regulator nfc_ldo.\n",
__func__);
return ret;
}
} else {
ret = regulator_disable(data->L16);
if (ret) {
pr_err("[NFC] %s: Failed to disable regulator nfc_ldo.\n",
__func__);
return ret;
}
}
return 0;
}
#endif
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
#ifdef CONFIG_PM
static int pn547_nfc_suspend(struct device *dev)
{
struct pn547_dev *info = PN547_NFC_GET_INFO(dev);
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
if(info->nfc_enable == 1){
if(info->nfc_clock)
{
clk_disable_unprepare(info->nfc_clock);
pr_info("%s power off and clk_disable_unprepare\n", __func__);
}
}
#endif
return 0;
}
static int pn547_nfc_resume(struct device *dev)
{
struct pn547_dev *info = PN547_NFC_GET_INFO(dev);
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
if(info->nfc_enable == 1){
if (IS_ERR(info->nfc_clock)) {
pr_err("[NFC] %s: Couldn't get D1)\n",
__func__);
} else {
//clk_put(pn547_dev->nfc_clock);
pr_info("%s power set and clk_prepare_enable\n", __func__);
if (clk_prepare_enable(info->nfc_clock))
pr_err("[NFC] %s: Couldn't prepare D1\n",
__func__);
}
}
#endif
return 0;
}
static SIMPLE_DEV_PM_OPS(pn547_nfc_pm_ops, pn547_nfc_suspend, pn547_nfc_resume);
#endif
#endif
#ifdef CONFIG_OF
static int pn547_parse_dt(struct device *dev,
struct pn547_i2c_platform_data *pdata)
{
struct device_node *np = dev->of_node;
pdata->irq_gpio = of_get_named_gpio_flags(np, "pn547,irq-gpio",
0, &pdata->irq_gpio_flags);
pdata->ven_gpio = of_get_named_gpio_flags(np, "pn547,ven-gpio",
0, &pdata->ven_gpio_flags);
pdata->firm_gpio = of_get_named_gpio_flags(np, "pn547,firm-gpio",
0, &pdata->firm_gpio_flags);
#ifdef CONFIG_NFC_PN547_PVDD_EN_CONTROL
pdata->pvdd_en = of_get_named_gpio_flags(np, "pn547,pvdd_en",
0, &pdata->pvdd_en_flags);
#endif
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
pdata->ese_pwr_req = of_get_named_gpio_flags(np, "pn547,pwr_req",
0, &pdata->ese_pwr_req_flags);
#endif
#ifdef CONFIG_NFC_PN547_8916_USE_BBCLK2
pdata->nfc_clock = clk_get(dev, "nfc_clock");
if (IS_ERR(pdata->nfc_clock)) {
pr_err("[NFC] %s: Couldn't get D1)\n",
__func__);
} else {
clk_put(pdata->nfc_clock);
#ifndef CONFIG_NFC_PN547_8916_CLK_CTL
if (clk_prepare_enable(pdata->nfc_clock))
pr_err("[NFC] %s: Couldn't prepare D1\n",
__func__);
#endif
}
#endif
if (pdata->firm_gpio < 0)
of_property_read_u32(np, "pn547,firm-expander-gpio",
&pdata->firm_gpio);
pr_info("%s: irq : %u, ven : %u, firm : %u\n",
__func__, pdata->irq_gpio, pdata->ven_gpio,
pdata->firm_gpio);
return 0;
}
#else
static int pn547_parse_dt(struct device *dev,
struct pn547_i2c_platform_data *pdata)
{
return -ENODEV;
}
#endif
static int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
int err;
struct pn547_i2c_platform_data *platform_data;
/*struct pn547_dev *pn547_dev;*/
struct pinctrl *nfc_pinctrl;
struct pinctrl_state *nfc_suspend;
struct pinctrl_state *nfc_active;
int addr=0x2B, addrcnt;
char tmp[4] = {0x20, 0x00, 0x01, 0x01};
if (client->dev.of_node) {
platform_data = devm_kzalloc(&client->dev,
sizeof(struct pn547_i2c_platform_data), GFP_KERNEL);
if (!platform_data) {
pr_err("%s Failed to allocate memory\n", __func__);
return -ENOMEM;
}
err = pn547_parse_dt(&client->dev, platform_data);
if (err)
return err;
} else {
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;
}
#ifdef CONFIG_NFC_PN547_PVDD_EN_CONTROL
ret = gpio_request(platform_data->pvdd_en, "nfc_pvdd_en");
if (ret) {
pr_err("failed to request about pvdd_en pin\n");
return -ENODEV;
}
#endif
ret = gpio_request(platform_data->irq_gpio, "nfc_int");
if (ret)
return -ENODEV;
ret = gpio_request(platform_data->ven_gpio, "nfc_ven");
if (ret)
goto err_ven;
ret = gpio_request(platform_data->firm_gpio, "nfc_firm");
if (ret)
goto err_firm;
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
ret = gpio_request(platform_data->ese_pwr_req, "ese_pwr");
if (ret)
goto err_ese;
#endif
/* Get pinctrl if target uses pinctrl */
nfc_pinctrl = devm_pinctrl_get(&client->dev);
if (IS_ERR(nfc_pinctrl)) {
pr_info("Target does not use pinctrl\n");
nfc_pinctrl = NULL;
} else {
nfc_suspend = pinctrl_lookup_state(nfc_pinctrl, "nfc_suspend");
nfc_active = pinctrl_lookup_state(nfc_pinctrl, "nfc_active");
if (IS_ERR(nfc_suspend)) {
pr_info("%s fail to suspend lookup_state\n", __func__);
goto err_exit;
}
if (IS_ERR(nfc_active)) {
pr_info("%s fail to active lookup_state\n", __func__);
goto err_exit;
}
ret = pinctrl_select_state(nfc_pinctrl, nfc_suspend);
if (ret != 0) {
pr_err("%s: fail to select_state suspend\n", __func__);
goto err_exit;
}
ret = pinctrl_select_state(nfc_pinctrl, nfc_active);
if (ret != 0) {
pr_err("%s: fail to select_state active\n", __func__);
goto err_exit;
}
devm_pinctrl_put(nfc_pinctrl);
}
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;
}
pr_info("%s : IRQ num %d\n", __func__, client->irq);
#ifdef CONFIG_NFC_PN547_PVDD_EN_CONTROL
pn547_dev->pvdd_en = platform_data->pvdd_en;
#endif
pn547_dev->irq_gpio = platform_data->irq_gpio;
pn547_dev->ven_gpio = platform_data->ven_gpio;
pn547_dev->firm_gpio = platform_data->firm_gpio;
pn547_dev->conf_gpio = platform_data->conf_gpio;
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
pn547_dev->ese_pwr_req = platform_data->ese_pwr_req;
#endif
#ifdef CONFIG_NFC_PN547_8916_USE_BBCLK2
pn547_dev->nfc_clock = platform_data->nfc_clock;
#endif
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
pn547_dev->p61_current_state = P61_STATE_IDLE;
pn547_dev->nfc_ven_enabled = false;
pn547_dev->spi_ven_enabled = false;
#endif
pn547_dev->client = client;
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
pn547_dev->nfc_enable = 0;
#endif
/* init mutex and queues */
init_waitqueue_head(&pn547_dev->read_wq);
mutex_init(&pn547_dev->read_mutex);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT //ese
sema_init(&ese_access_sema, 1);
mutex_init(&pn547_dev->p61_state_mutex);
#endif
pn547_dev->pn547_device.minor = MISC_DYNAMIC_MINOR;
#ifdef CONFIG_NFC_PN547
pn547_dev->pn547_device.name = "pn547";
#else
pn547_dev->pn547_device.name = "pn544";
#endif
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);
#ifdef CONFIG_NFC_PN547_PVDD_EN_CONTROL
gpio_direction_output(pn547_dev->pvdd_en, 1);
#endif
gpio_direction_input(pn547_dev->irq_gpio);
gpio_direction_output(pn547_dev->ven_gpio, 0);
gpio_direction_output(pn547_dev->firm_gpio, 0);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
gpio_direction_output(pn547_dev->ese_pwr_req, 0);
#endif
i2c_set_clientdata(client, pn547_dev);
wake_lock_init(&pn547_dev->nfc_wake_lock,
WAKE_LOCK_SUSPEND, "nfc_wake_lock");
#ifdef CONFIG_NFC_PN547_LDO_CONTROL
nfc_power_onoff(pn547_dev,1);
#endif
ret = request_irq(client->irq, pn547_dev_irq_handler,
IRQF_TRIGGER_RISING, "pn547", pn547_dev);
if (ret) {
dev_err(&client->dev, "request_irq failed\n");
goto err_request_irq_failed;
}
disable_irq_nosync(pn547_dev->client->irq);
atomic_set(&pn547_dev->irq_enabled, 0);
gpio_set_value(pn547_dev->firm_gpio, 1); /* add firmware pin */
msleep(20);
gpio_set_value(pn547_dev->ven_gpio, 1);
gpio_set_value(pn547_dev->firm_gpio, 1); /* add firmware pin */
usleep_range(4900, 5000);
gpio_set_value(pn547_dev->ven_gpio, 0);
usleep_range(4900, 5000);
gpio_set_value(pn547_dev->ven_gpio, 1);
usleep_range(4900, 5000);
// for (addr = 0x2B; addr > 0x27; addr--)
{
client->addr = addr;
addrcnt = 2;
do {
ret = i2c_master_send(client, tmp, 4);
if (ret > 0) {
pr_info("%s : i2c addr=0x%X\n",
__func__, client->addr);
break;
}
} while (addrcnt--);
/*if (ret > 0)
break;*/
}
if(ret <= 0)
client->addr = 0x2B;
gpio_set_value(pn547_dev->ven_gpio, 0);
gpio_set_value(pn547_dev->firm_gpio, 0); /* add */
if (ret < 0) {
pr_err("%s : fail to get i2c addr\n", __func__);
goto err_request_irq_failed;
}
else
pr_info("%s : success\n", __func__);
return 0;
err_request_irq_failed:
misc_deregister(&pn547_dev->pn547_device);
wake_lock_destroy(&pn547_dev->nfc_wake_lock);
err_misc_register:
mutex_destroy(&pn547_dev->read_mutex);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
mutex_destroy(&pn547_dev->p61_state_mutex);
#endif
kfree(pn547_dev);
err_exit:
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
gpio_free(platform_data->ese_pwr_req);
err_ese:
#endif
gpio_free(platform_data->firm_gpio);
err_firm:
gpio_free(platform_data->ven_gpio);
err_ven:
gpio_free(platform_data->irq_gpio);
pr_err("[pn547] pn547_probe fail!\n");
return ret;
}
static int pn547_remove(struct i2c_client *client)
{
struct pn547_dev *pn547_dev;
pn547_dev = i2c_get_clientdata(client);
#ifdef CONFIG_NFC_PN547_8916_USE_BBCLK2
if(pn547_dev->nfc_clock)
clk_disable_unprepare(pn547_dev->nfc_clock);
#endif
wake_lock_destroy(&pn547_dev->nfc_wake_lock);
free_irq(client->irq, pn547_dev);
misc_deregister(&pn547_dev->pn547_device);
mutex_destroy(&pn547_dev->read_mutex);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
mutex_destroy(&pn547_dev->p61_state_mutex);
#endif
gpio_free(pn547_dev->irq_gpio);
gpio_free(pn547_dev->ven_gpio);
gpio_free(pn547_dev->firm_gpio);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
pn547_dev->p61_current_state = P61_STATE_INVALID;
pn547_dev->nfc_ven_enabled = false;
pn547_dev->spi_ven_enabled = false;
#endif
kfree(pn547_dev);
return 0;
}
static const struct i2c_device_id pn547_id[] = {
{"pn547", 0},
{}
};
#ifdef CONFIG_OF
static struct of_device_id nfc_match_table[] = {
{ .compatible = "pn547",},
{},
};
#else
#define nfc_match_table NULL
#endif
static struct i2c_driver pn547_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "pn547",
#ifdef CONFIG_NFC_PN547_8916_CLK_CTL
#ifdef CONFIG_PM
.pm = &pn547_nfc_pm_ops,
#endif
#endif
.of_match_table = nfc_match_table,
},
.id_table = pn547_id,
.probe = pn547_probe,
.remove = pn547_remove,
};
/*
* module load/unload record keeping
*/
static int __init pn547_dev_init(void)
{
pr_info("Loading pn547 driver\n");
if(poweroff_charging)
return 0;
else
return i2c_add_driver(&pn547_driver);
}
module_init(pn547_dev_init);
static void __exit pn547_dev_exit(void)
{
pr_info("Unloading pn547 driver\n");
i2c_del_driver(&pn547_driver);
}
module_exit(pn547_dev_exit);
MODULE_AUTHOR("Sylvain Fonteneau");
MODULE_DESCRIPTION("NFC PN547 driver");
MODULE_LICENSE("GPL");
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