/*
* 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 "pn547.h"
#include <linux/wakelock.h>
#include <linux/of_gpio.h>
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
#include <mach/msm_xo.h>
#include <linux/workqueue.h>
#endif
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#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 NFC_DEBUG 0
#define MAX_TRY_I2C_READ 10
#define I2C_ADDR_READ_L 0x51
#define I2C_ADDR_READ_H 0x57
#define FEATURE_SEC_NFC_TEST
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);
int ven_gpio;
int firm_gpio;
int irq_gpio;
int pvdd; /*pvdd-gpio number*/
void __iomem *clkctrl;
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
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 */
#endif
bool spi_ven_enabled; /* stores the VEN pin state powered by Spi */
bool nfc_ven_enabled; /* stores the VEN pin state powered by Nfc */
atomic_t irq_enabled;
atomic_t read_flag;
bool cancel_read;
struct wake_lock nfc_wake_lock;
struct wake_lock nfc_clk_wake_lock;
struct clk *nfc_clock;
int clk_req_gpio;
int clk_req_irq;
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
struct msm_xo_voter *nfc_clock;
struct work_struct work_nfc_clock;
struct workqueue_struct *wq_clock;
bool clock_state;
#endif
long nfc_service_pid; /*used to signal the nfc the nfc service */
};
static struct pn547_dev *pn547_dev;
static atomic_t s_Device_opened = ATOMIC_INIT(1);
#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);
static unsigned char svdd_sync_wait;
#endif
static void set_pd(struct pn547_dev *info, int power)
{
if (info->ven_gpio > 0) {
gpio_direction_output(info->ven_gpio, power);
}
else {
unsigned int val = 0;
int pd_active=0;
val = readl(info->clkctrl);
pd_active = (val & PN547_NFC_CLKCTRL_PD_POLA);
if (!pd_active) {
if (power)
val &= ~PN547_NFC_CLKCTRL_PD;
else
val |= PN547_NFC_CLKCTRL_PD;
} else {
if (power)
val |= PN547_NFC_CLKCTRL_PD;
else
val &= ~PN547_NFC_CLKCTRL_PD;
}
writel(val, info->clkctrl);
pr_info("%s , val : %x\n", __func__,readl(info->clkctrl));
}
}
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;
}
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
static void nfc_work_func_clock(struct work_struct *work)
{
struct pn547_dev *pn547_dev = container_of(work, struct pn547_dev,
work_nfc_clock);
int ret = 0;
if (gpio_get_value(pn547_dev->clk_req_gpio)) {
if (pn547_dev->clock_state == false) {
ret = msm_xo_mode_vote(pn547_dev->nfc_clock,
MSM_XO_MODE_ON);
if (ret < 0) {
pr_err("%s: Failed to vote for TCX0_A1 ON (%d)\n",
__func__, ret);
}
pn547_dev->clock_state = true;
}
} else {
if (pn547_dev->clock_state == true) {
ret = msm_xo_mode_vote(pn547_dev->nfc_clock,
MSM_XO_MODE_OFF);
if (ret < 0) {
pr_err("%s: Failed to vote for TCX0_A1 OFF (%d)\n",
__func__, ret);
}
pn547_dev->clock_state = false;
}
}
}
static irqreturn_t pn547_dev_clk_req_irq_handler(int irq, void *dev_id)
{
struct pn547_dev *pn547_dev = dev_id;
queue_work(pn547_dev->wq_clock, &pn547_dev->work_nfc_clock);
return IRQ_HANDLED;
}
#endif
static irqreturn_t pn547_nfc_clk_irq(int irq, void *dev_id)
{
struct pn547_dev *pn547_dev = dev_id;
#if 0
if (gpio_get_value(pn547_dev->clk_req_gpio)) {
if(!wake_lock_active(&pn547_dev->nfc_clk_wake_lock))
wake_lock(&pn547_dev->nfc_clk_wake_lock);
} else {
if (wake_lock_active(&pn547_dev->nfc_clk_wake_lock))
wake_unlock(&pn547_dev->nfc_clk_wake_lock);
}
#else
wake_lock_timeout(&pn547_dev->nfc_clk_wake_lock, 2*HZ);
#endif
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);
return -1;
}
}
else{
pr_info("finding task from PID failed\r\n");
return -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);
svdd_sync_wait = 1;
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");
svdd_sync_wait = 0;
}
}
pr_info("%s: Exit\n", __func__);
}
static int release_svdd_wait(void)
{
unsigned char i = 0;
pr_info("%s: Enter \n", __func__);
for(i=0;i<9;i++)
{
if(svdd_sync_wait)
{
up(&svdd_sync_onoff_sema);
svdd_sync_wait = 0;
break;
} else msleep(10);
}
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);
if (!atomic_dec_and_test(&s_Device_opened)) {
atomic_inc(&s_Device_opened);
pr_err("%s: already opened!\n", __func__);
return -EBUSY;
}
filp->private_data = pn547_dev;
pr_debug("%s : %d,%d\n", __func__, imajor(inode), iminor(inode));
return 0;
}
static int pn547_dev_release(struct inode *inode, struct file *filp)
{
atomic_inc(&s_Device_opened);
return 0;
}
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
static unsigned char p61_trans_acc_on = 0;
#endif
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);
switch (cmd) {
case PN547_SET_PWR:
{
p61_access_state_t current_state = P61_STATE_INVALID;
p61_get_access_state(pn547_dev, ¤t_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)
*/
p61_update_access_state(pn547_dev, P61_STATE_DWNLD, true);
set_pd(pn547_dev, PN547_NFC_PW_ON);
gpio_set_value(pn547_dev->firm_gpio, 1);
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_OFF);
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_ON);
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));
if (pn547_dev->ven_gpio > 0)
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) {
set_pd(pn547_dev, PN547_NFC_PW_ON);
}
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);
}
svdd_sync_wait = 0;
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) {
set_pd(pn547_dev, PN547_NFC_PW_OFF);
}
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, ¤t_state);
if (arg == 1) {
pr_info("%s : PN61_SET_SPI_PWR - power on ese, cur=0x%x\n", __func__, current_state);
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 */
set_pd(pn547_dev, PN547_NFC_PW_ON);
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) {
set_pd(pn547_dev, PN547_NFC_PW_OFF);
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) {
set_pd(pn547_dev, PN547_NFC_PW_OFF);
msleep(10);
}
} else {
pr_err("%s : PN61_SET_SPI_PWR - failed, current_state = 0x%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 */
set_pd(pn547_dev, PN547_NFC_PW_ON);
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 */
set_pd(pn547_dev, PN547_NFC_PW_ON);
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, ¤t_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, ¤t_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 POWER REQ 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 POWER REQ 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:
{
p61_access_state_t current_state = P61_STATE_INVALID;
p61_get_access_state(pn547_dev, ¤t_state);
if((p61_trans_acc_on == 1) && ((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0))
release_ese_lock(P61_STATE_WIRED);
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
switch (cmd) {
case PN547_SET_PWR:
if (arg == 2) {
/* power on with firmware download (requires hw reset)
*/
set_pd(pn547_dev, PN547_NFC_PW_ON);
gpio_set_value(pn547_dev->firm_gpio, 1);
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_OFF);
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_ON);
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));
} else if (arg == 1) {
/* power on */
if (pn547_dev->conf_gpio)
pn547_dev->conf_gpio();
gpio_set_value(pn547_dev->firm_gpio, 0);
set_pd(pn547_dev, PN547_NFC_PW_ON);
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);
}
pr_info("%s power off, irq=%d\n", __func__,
atomic_read(&pn547_dev->irq_enabled));
gpio_set_value(pn547_dev->firm_gpio, 0);
set_pd(pn547_dev, PN547_NFC_PW_OFF);
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);
return -EINVAL;
}
break;
default:
pr_err("%s bad ioctl %u\n", __func__, cmd);
return -EINVAL;
}
#endif
return 0;
}
EXPORT_SYMBOL(pn547_dev_ioctl);
#ifdef CONFIG_COMPAT
long pn547_compat_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
pr_info("%s : cmd = %u, arg = %ld\n", __func__, cmd, arg);
arg = (unsigned long) compat_ptr(arg);
switch (cmd) {
case PN547_SET_PWR:
case P61_SET_SPI_PWR:
case P61_GET_PWR_STATUS:
case P61_SET_WIRED_ACCESS:
case P547_SET_NFC_SERVICE_PID:
return pn547_dev_ioctl(filp, cmd, arg);
}
return -ENOIOCTLCMD;
}
#endif
#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 =(0x%x), 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;
}
p61_trans_acc_on = 1;
pr_info("get_ese_lock: exit p61_trans_acc_on =%d, timeout = %d\n"
, p61_trans_acc_on, timeout);
return 0;
}
EXPORT_SYMBOL(get_ese_lock);
static void release_ese_lock(p61_access_state_t p61_current_state)
{
pr_info("%s: enter p61_current_state = (0x%x)\n", __func__, p61_current_state);
up(&ese_access_sema);
p61_trans_acc_on = 0;
pr_info("%s: p61_trans_acc_on =%d exit\n", __func__, p61_trans_acc_on);
}
#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,
.release = pn547_dev_release,
.unlocked_ioctl = pn547_dev_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = pn547_compat_ioctl,
#endif
};
static int pn547_parse_dt(struct device *dev,
struct pn547_i2c_platform_data *pdata)
{
struct device_node *np = dev->of_node;
int ret;
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);
if (pdata->ven_gpio < 0)
pdata->ven_gpio = of_get_named_gpio_flags(np, "pn547,ven-expander-gpio",
0, &pdata->ven_gpio_flags);
if(pdata->ven_gpio < 0) {
if (of_property_read_u32(np, "clkctrl-reg", (u32 *)&pdata->clkctrl_addr)) {
pr_err("%s: no ven_gpio at dt file\n", __func__);
return -ENOENT;
}
}
pdata->firm_gpio = of_get_named_gpio_flags(np, "pn547,firm-gpio",
0, &pdata->firm_gpio_flags);
if (pdata->firm_gpio < 0)
of_property_read_u32(np, "pn547,firm-expander-gpio",
&pdata->firm_gpio);
#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
if (of_get_property(dev->of_node, "pn547,nfc_pm_clk", NULL)) {
pdata->clk = clk_get(dev, "rf_clk");
if (IS_ERR(pdata->clk)) {
pr_err("%s: Couldn't get rf_clk\n", __func__);
} else {
pr_info("%s : enable rf_clk\n", __func__);
clk_prepare_enable(pdata->clk);
}
ret = of_get_named_gpio(np, "pn547,clk_req-gpio", 0);
if (ret < 0) {
pr_info("%s : clk_req-gpio is not set", __func__);
} else
pdata->clk_req_gpio = ret;
}
if (of_find_property(np, "pn547,nfc_clkreq_int", NULL))
pdata->clk_req_gpio = of_get_named_gpio(np, "pn547,nfc_clkreq_int", 0);
pr_info("%s: irq : %d, ven : %d, firm : %d\n",
__func__, pdata->irq_gpio, pdata->ven_gpio,
pdata->firm_gpio);
return 0;
}
static int pn547_regulator_onoff(struct i2c_client *client, int onoff)
{
int rc = 0;
struct regulator *regulator_i2c_1p8;
pr_err("%s - onoff = %d\n", __func__, onoff);
regulator_i2c_1p8 = regulator_get(&client->dev, "pn547,i2c_1p8");
if (IS_ERR(regulator_i2c_1p8) || regulator_i2c_1p8 == NULL) {
pr_err("%s - i2c_1p8 regulator_get fail\n", __func__);
return -ENODEV;
}
pr_info("%s - onoff = %d\n", __func__, onoff);
if (onoff == NFC_I2C_LDO_ON) {
rc = regulator_enable(regulator_i2c_1p8);
if (rc) {
pr_err("%s - enable i2c_1p8 failed, rc=%d\n",
__func__, rc);
goto done;
}
} else {
rc = regulator_disable(regulator_i2c_1p8);
if (rc) {
pr_err("%s - disable i2c_1p8 failed, rc=%d\n",
__func__, rc);
goto done;
}
}
done:
regulator_put(regulator_i2c_1p8);
return rc;
}
#ifdef FEATURE_SEC_NFC_TEST
static ssize_t pn547_class_show(struct class * class, struct class_attribute *attr, char *buf) {
int size;
int ret = 0;
int count = 4;
char tmp[128] = {0x20, 0x00, 0x01, 0x00, };
int retry;
bool old_ven, old_irq;
int old_read_value;
pr_err("%s : start\n", __func__);
/*TODO : nfc_ven_enabled should be capsulated with ESE_SUPPORT */
old_ven = pn547_dev->nfc_ven_enabled;
pr_info("%s : old_ven is %d\n", __func__, old_ven);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
p61_access_lock(pn547_dev);
#endif
retry = 20;
if(!old_ven) { /* if nfc status is off */
pn547_dev->nfc_ven_enabled = true;
if (pn547_dev->spi_ven_enabled == false) {
set_pd(pn547_dev, PN547_NFC_PW_ON);
}
usleep_range(4900, 5000);
}
else { /* if nfc status is on */
//wake up device
set_pd(pn547_dev, PN547_NFC_PW_OFF);
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_ON);
usleep_range(4900, 5000);
//intercept i2c_master_recv
pn547_dev->cancel_read = 1;
atomic_set(&pn547_dev->read_flag, 1);
}
wake_up_all(&pn547_dev->read_wq);
while(!mutex_trylock(&pn547_dev->read_mutex) && --retry) {
usleep_range(15, 20);
}
if(!retry) {
pr_err("%s : mutex_trylock failed. check pn547_dev_read()\n", __func__);
ret = sprintf(buf, "test failed : device in use\n");
goto fail_lock;
}
pr_info("%s : read_mutex locked. retry : %d\n", __func__, retry);
atomic_set(&pn547_dev->read_flag, 0);
pn547_dev->cancel_read = 0;
old_irq = atomic_read(&pn547_dev->irq_enabled);
pr_info("%s : old_irq is %d\n", __func__, old_irq);
if(!old_irq) {
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));
}
retry = 2;
do {
ret = i2c_master_send(pn547_dev->client, tmp, count);
if(count == ret) {
break;
}
pr_info("%s : i2c_master_send error. ret: %d, retry: %d\n", __func__, ret, retry);
usleep_range(6000, 10000); /* Retry, chip was in standby */
} while(retry--);
if(ret != count) {
pr_err("%s : failed. count error. send=%d, recv=%d\n", __func__, count, ret);
ret = 0;
goto fail;
}
pr_err("%s : send success. returned: %d\n", __func__, ret);
//wait for reply
#if NFC_DEBUG
pr_info("pn547: wait_event_interruptible : in\n");
#endif
ret = 0;
old_read_value = atomic_read(&pn547_dev->read_flag);
pr_info("%s: read_flag %d, cancel_read %d", __func__, old_read_value, pn547_dev->cancel_read);
if(!old_read_value) {
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 = 0;
//todo : old_ven and old_irq rollback needed
goto fail;
}
if (ret) {
ret = 0;
goto fail;
}
/* Read data */
count = 6;
ret = i2c_master_recv(pn547_dev->client, tmp, count);
#if NFC_DEBUG
pr_info("pn547: i2c_master_recv\n");
#endif
mutex_unlock(&pn547_dev->read_mutex);
if(!old_ven) { /* if nfc status is off */
if (pn547_dev->spi_ven_enabled == false) {
set_pd(pn547_dev, PN547_NFC_PW_OFF);
}
usleep_range(4900, 5000);
pn547_dev->nfc_ven_enabled = false;
}
if(!old_irq) {
atomic_set(&pn547_dev->irq_enabled, 0);
disable_irq_wake(pn547_dev->client->irq);
disable_irq_nosync(pn547_dev->client->irq);
}
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
p61_access_unlock(pn547_dev);
#endif
if (ret < 0 || ret > count) {
pr_err("%s: i2c_master_recv returned %d. count : %d\n", __func__, ret, count);
return 0;
}
size = sprintf(buf, "test completed!! size: %d, data: %X %X %X %X %X %X\n", ret, tmp[0], tmp[1], tmp[2], tmp[3], tmp[4], tmp[5]);
pr_err("%s : recv success.\n", __func__);
msleep(10);
return size;
fail:
mutex_unlock(&pn547_dev->read_mutex);
fail_lock:
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
p61_access_unlock(pn547_dev);
#endif
return ret;
}
static ssize_t pn547_class_store(struct class * class, struct class_attribute *attr, const char *buf, size_t size) {
return size;
}
static CLASS_ATTR(test, 0664, pn547_class_show, pn547_class_store);
#endif //FEATURE_SEC_NFC_TEST
static ssize_t pn547_support_show(struct class * class, struct class_attribute *attr, char *buf)
{
pr_info("\n");
return 0;
}
static CLASS_ATTR(nfc_support, 0444, pn547_support_show, NULL);
static int pn547_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
int err;
int addr;
char tmp[4] = {0x20, 0x00, 0x01, 0x01};
int addrcnt;
struct device_node *np = client->dev.of_node;
struct pn547_i2c_platform_data *platform_data;
int nfc_support = 0;
struct property *prop;
#ifdef FEATURE_SEC_NFC_TEST
struct class *nfc_class;
#endif
/*separate NFC / non NFC using GPIO*/
prop = of_find_property(np, "pn547,check_nfc", NULL);
if (prop) {
nfc_support = gpio_get_value(of_get_named_gpio(np, "pn547,check_nfc", 0));
if (nfc_support > 0) {
pr_info("%s : nfc support model : %d\n", __func__, nfc_support);
}else{
pr_info("%s : nfc not support model : %d\n", __func__, nfc_support);
return -ENXIO;
}
}
/*struct pn547_dev *pn547_dev;*/
#ifdef FEATURE_SEC_NFC_TEST
nfc_class = class_create(THIS_MODULE, "nfc_test");
if (IS_ERR(&nfc_class))
{
pr_err("NFC: failed to create nfc_test class\n");
}
else
{
ret = class_create_file(nfc_class, &class_attr_test);
if (ret)
pr_err("NFC: failed to create attr_test\n");
}
#endif //FEATURE_SEC_NFC_TEST
nfc_class = class_create(THIS_MODULE, "nfc");
if (IS_ERR(&nfc_class))
{
pr_err("NFC: failed to create nfc class\n");
}
else
{
ret = class_create_file(nfc_class, &class_attr_nfc_support);
if (ret)
pr_err("NFC: failed to create attr_nfc_support\n");
}
pr_info("%s entered\n", __func__);
if (client->dev.of_node) {
platform_data = devm_kzalloc(&client->dev,
sizeof(struct pn547_i2c_platform_data), GFP_KERNEL);
if (!platform_data) {
dev_err(&client->dev, "Failed to allocate memory\n");
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;
}
ret = gpio_request(platform_data->irq_gpio, "nfc_int");
if (ret)
return -ENODEV;
if (platform_data->ven_gpio > 0) {
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
ret = gpio_request(platform_data->clk_req_gpio, "nfc_clk_req");
if (ret)
goto err_clk_req;
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(platform_data->ven_gpio < 0) {
if (platform_data->clkctrl_addr != 0) {
unsigned int val = 0;
pn547_dev->clkctrl = ioremap_nocache(platform_data->clkctrl_addr, 0x4);
if (!pn547_dev->clkctrl) {
dev_err(&client->dev, "cannot remap register\n");
ret = -ENXIO;
goto err_ioremap;
}
val = readl(pn547_dev->clkctrl);
val |= (PN547_NFC_CLKCTRL_PD_POLA | PN547_NFC_CLKCTRL_REQ_POLA | PN547_NFC_CLKCTRL_CLK_ENABLE);
writel(val, pn547_dev->clkctrl);
pr_info("%s: clkctrl=0x%X\n", __func__, val);
}
}
if (of_get_property(client->dev.of_node, "pn547,ldo_control", NULL)) {
ret = pn547_regulator_onoff(client, NFC_I2C_LDO_ON);
if (ret < 0)
pr_err("%s pn547 regulator_on fail err = %d\n",
__func__, ret);
usleep_range(1000, 1100);
} else {
ret = of_get_named_gpio(client->dev.of_node, "pn547,pvdd-gpio", 0);
if (ret < 0) {
pr_err("%s : pvdd-gpio is not set", __func__);
} else {
pn547_dev->pvdd = ret;
ret = gpio_request(pn547_dev->pvdd, "pvdd-gpio");
if (ret) {
dev_err(&client->dev, "%s failed to get gpio pvdd-gpio\n", __func__);
gpio_free(pn547_dev->pvdd);
goto err_pvdd;
}
gpio_direction_output(pn547_dev->pvdd, 1);
pr_info("%s pvdd-gpio:%d",__func__, pn547_dev->pvdd);
}
}
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
pn547_dev->nfc_clock = msm_xo_get(MSM_XO_TCXO_A1, "nfc");
if (IS_ERR(pn547_dev->nfc_clock)) {
ret = PTR_ERR(pn547_dev->nfc_clock);
printk(KERN_ERR "%s: Couldn't get TCXO_A1 vote for NFC (%d)\n",
__func__, ret);
ret = -ENODEV;
goto err_get_clock;
}
pn547_dev->clock_state = false;
#endif
#ifdef CONFIG_NFC_PM_BBCLK2
pn547_dev->nfc_clock = clk_get(&client->dev, "nfc_clock");
if (IS_ERR(pn547_dev->nfc_clock)) {
ret = PTR_ERR(pn547_dev->nfc_clock);
printk(KERN_ERR "%s: Couldn't get D1 (%d)\n",
__func__, ret);
} else {
if (clk_prepare_enable(pn547_dev->nfc_clock))
printk(KERN_ERR "%s: Couldn't prepare D1\n",
__func__);
}
#endif
#if defined(CONFIG_NFC_PN547_CLK_BBCLK2)
#if defined(CONFIG_NFC_I2C_OVERWRITE) || defined(CONFIG_NFC_PN547_8084_USE_BBCLK2)
pn547_dev->nfc_clk = clk_get(NULL, "nfc_clk");
#else
pn547_dev->nfc_clk = clk_get(&client->dev, "nfc_clk");
#endif
if (IS_ERR(pn547_dev->nfc_clk)) {
ret = PTR_ERR(pn547_dev->nfc_clk);
printk(KERN_ERR "%s: Couldn't get D1 (%d)\n",
__func__, ret);
} else {
if (clk_prepare_enable(pn547_dev->nfc_clk))
printk(KERN_ERR "%s: Couldn't prepare D1\n",
__func__);
}
#endif
#if defined(CONFIG_GPIO_PCAL6416A)
client->irq = gpio_to_irq(platform_data->irq_gpio);
#endif
pr_info("%s : IRQ num %d\n", __func__, client->irq);
pn547_dev->irq_gpio = platform_data->irq_gpio;
pn547_dev->ven_gpio = platform_data->ven_gpio;
pn547_dev->firm_gpio = platform_data->firm_gpio;
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
pn547_dev->ese_pwr_req = platform_data->ese_pwr_req;
#endif
pn547_dev->conf_gpio = platform_data->conf_gpio;
pn547_dev->clk_req_gpio = platform_data->clk_req_gpio;
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
pn547_dev->clk_req_irq = platform_data->clk_req_irq;
#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;
/* init mutex and queues */
init_waitqueue_head(&pn547_dev->read_wq);
mutex_init(&pn547_dev->read_mutex);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
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);
gpio_direction_input(pn547_dev->irq_gpio);
set_pd(pn547_dev, PN547_NFC_PW_OFF);
gpio_direction_output(pn547_dev->firm_gpio, 0);
#ifdef CONFIG_NFC_PN547_ESE_SUPPORT
gpio_direction_output(pn547_dev->ese_pwr_req, 0);
#endif
#if defined(CONFIG_NFC_PN547_CLOCK_REQUEST) || defined(CONFIG_NFC_PM_BBCLK2)
gpio_direction_input(pn547_dev->clk_req_gpio);
#endif
i2c_set_clientdata(client, pn547_dev);
wake_lock_init(&pn547_dev->nfc_wake_lock,
WAKE_LOCK_SUSPEND, "nfc_wake_lock");
wake_lock_init(&pn547_dev->nfc_clk_wake_lock,
WAKE_LOCK_SUSPEND, "nfc_clk_wake_lock");
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
pn547_dev->wq_clock = create_singlethread_workqueue("nfc_wq");
if (!pn547_dev->wq_clock) {
ret = -ENOMEM;
pr_err("%s: could not create workqueue\n", __func__);
goto err_create_workqueue;
}
INIT_WORK(&pn547_dev->work_nfc_clock, nfc_work_func_clock);
#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);
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
ret = request_irq(pn547_dev->clk_req_irq, pn547_dev_clk_req_irq_handler,
IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING
, "pn547_clk_req", pn547_dev);
if (ret) {
dev_err(&client->dev, "request_irq(clk_req) failed\n");
goto err_request_irq_failed;
}
enable_irq_wake(pn547_dev->clk_req_irq);
#else
if(platform_data->clk_req_gpio > 0) {
pn547_dev->clk_req_irq = gpio_to_irq(platform_data->clk_req_gpio);
ret = request_irq(pn547_dev->clk_req_irq, pn547_nfc_clk_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "nfc_clk",pn547_dev);
if (ret < 0) {
dev_err(&client->dev, "failed to register IRQ handler\n");
goto err_request_irq_failed;
}
ret = enable_irq_wake(pn547_dev->clk_req_irq);
if (ret < 0)
dev_err(&client->dev,
"%s: Failed to Enable Wakeup Source(%d)\n", __func__, ret);
}
#endif
set_pd(pn547_dev, PN547_NFC_PW_ON);
gpio_set_value(pn547_dev->firm_gpio, 1); /* add firmware pin */
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_OFF);
usleep_range(4900, 5000);
set_pd(pn547_dev, PN547_NFC_PW_ON);
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;
set_pd(pn547_dev, PN547_NFC_PW_OFF);
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:
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
err_create_workqueue:
#endif
misc_deregister(&pn547_dev->pn547_device);
wake_lock_destroy(&pn547_dev->nfc_wake_lock);
wake_lock_destroy(&pn547_dev->nfc_clk_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
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
msm_xo_put(pn547_dev->nfc_clock);
err_get_clock:
#endif
err_ioremap:
if(!pn547_dev->clkctrl)
iounmap(pn547_dev->clkctrl);
err_pvdd:
kfree(pn547_dev);
err_exit:
gpio_free(platform_data->clk_req_gpio);
err_clk_req:
#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_PM_BBCLK2
if(pn547_dev->nfc_clock)
clk_unprepare(pn547_dev->nfc_clock);
#endif
#if defined(CONFIG_NFC_PN547_CLK_BBCLK2)
if (pn547_dev->nfc_clk)
clk_unprepare(pn547_dev->nfc_clk);
#endif
wake_lock_destroy(&pn547_dev->nfc_wake_lock);
wake_lock_destroy(&pn547_dev->nfc_clk_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);
if(pn547_dev->ven_gpio > 0)
gpio_free(pn547_dev->ven_gpio);
else
iounmap(pn547_dev->clkctrl);
gpio_free(pn547_dev->firm_gpio);
gpio_free(pn547_dev->clk_req_gpio);
#ifdef CONFIG_NFC_PN547_CLOCK_REQUEST
msm_xo_put(pn547_dev->nfc_clock);
#endif
#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 = {
.id_table = pn547_id,
.probe = pn547_probe,
.remove = pn547_remove,
.driver = {
.owner = THIS_MODULE,
.name = "pn547",
.of_match_table = nfc_match_table,
},
};
/*
* module load/unload record keeping
*/
/*extern unsigned int system_rev;*/
static int __init pn547_dev_init(void)
{
pr_info("Loading pn547 driver\n");
#if CONFIG_ARCH_EXYNOS
if(lpcharge)
#else
if(poweroff_charging)
#endif
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");