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kernel_samsung_a53x/drivers/nfc/samsung/sec_nfc.c
Gabriel2392 7ed7ee9edf Import A536BXXU9EXDC
2024-06-15 16:02:09 -03:00

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/*
* SAMSUNG NFC Controller
*
* Copyright (C) 2013 Samsung Electronics Co.Ltd
* Author: Woonki Lee <woonki84.lee@samsung.com>
* Heejae Kim <heejae12.kim@samsung.com>
*
* 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
*
*/
#ifdef CONFIG_SEC_NFC_IF_I2C_GPIO
#define CONFIG_SEC_NFC_IF_I2C
#endif
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include <linux/clk-provider.h>
#ifdef CONFIG_SEC_NFC_GPIO_CLK
#include <linux/interrupt.h>
#endif
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
#include <linux/wakelock.h>
#endif
#include <linux/of_gpio.h>
#include <linux/clk.h>
#ifndef CONFIG_SEC_NFC_IF_I2C
struct sec_nfc_i2c_info {};
#define sec_nfc_read NULL
#define sec_nfc_write NULL
#define sec_nfc_poll NULL
#define sec_nfc_i2c_irq_clear(x)
#define SEC_NFC_GET_INFO(dev) platform_get_drvdata(to_platform_device(dev))
#else /* CONFIG_SEC_NFC_IF_I2C */
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/i2c.h>
#include "sec_nfc.h"
#define SEC_NFC_GET_INFO(dev) i2c_get_clientdata(to_i2c_client(dev))
enum sec_nfc_irq {
SEC_NFC_SKIP = -1,
SEC_NFC_NONE,
SEC_NFC_INT,
SEC_NFC_READ_TIMES,
};
struct sec_nfc_i2c_info {
struct i2c_client *i2c_dev;
struct mutex read_mutex;
enum sec_nfc_irq read_irq;
wait_queue_head_t read_wait;
size_t buflen;
u8 *buf;
};
#endif
struct sec_nfc_info {
struct miscdevice miscdev;
struct mutex mutex;
enum sec_nfc_mode mode;
struct device *dev;
struct sec_nfc_platform_data *pdata;
struct sec_nfc_i2c_info i2c_info;
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
struct wake_lock nfc_wake_lock;
#endif
#ifdef CONFIG_SEC_NFC_GPIO_CLK
bool clk_ctl;
bool clk_state;
#endif
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
void __iomem *clkctrl;
#endif
};
#ifdef CONFIG_SEC_ESE_COLDRESET
struct mutex coldreset_mutex;
struct mutex sleep_wake_mutex;
bool sleep_wakeup_state[2];
u8 disable_combo_reset_cmd[4] = {0x2F, 0x30, 0x01, 0x00};
bool is_shutdown = false;
enum sec_nfc_mode cur_mode;
#endif
#ifdef CONFIG_SEC_NFC_IF_I2C
static irqreturn_t sec_nfc_irq_thread_fn(int irq, void *dev_id)
{
struct sec_nfc_info *info = dev_id;
struct sec_nfc_platform_data *pdata = info->pdata;
dev_dbg(info->dev, "[NFC] Read Interrupt is occurred!\n");
if (gpio_get_value(pdata->irq) == 0) {
dev_err(info->dev, "[NFC] Warning,irq-gpio state is low!\n");
return IRQ_HANDLED;
}
mutex_lock(&info->i2c_info.read_mutex);
/* Skip interrupt during power switching
* It is released after first write */
if (info->i2c_info.read_irq == SEC_NFC_SKIP) {
dev_dbg(info->dev, "%s: Now power swiching. Skip this IRQ\n", __func__);
mutex_unlock(&info->i2c_info.read_mutex);
return IRQ_HANDLED;
}
info->i2c_info.read_irq += SEC_NFC_READ_TIMES;
mutex_unlock(&info->i2c_info.read_mutex);
wake_up_interruptible(&info->i2c_info.read_wait);
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
wake_lock_timeout(&info->nfc_wake_lock, 2 * HZ);
#endif
return IRQ_HANDLED;
}
static ssize_t sec_nfc_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
enum sec_nfc_irq irq;
int ret = 0;
dev_dbg(info->dev, "%s: info: %p, count: %zu\n", __func__,
info, count);
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
dev_err(info->dev, "sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
mutex_lock(&info->i2c_info.read_mutex);
if (count == 0) {
if (info->i2c_info.read_irq >= SEC_NFC_INT)
info->i2c_info.read_irq--;
mutex_unlock(&info->i2c_info.read_mutex);
goto out;
}
irq = info->i2c_info.read_irq;
mutex_unlock(&info->i2c_info.read_mutex);
if (irq == SEC_NFC_NONE) {
if (file->f_flags & O_NONBLOCK) {
dev_err(info->dev, "it is nonblock\n");
ret = -EAGAIN;
goto out;
}
}
/* i2c recv */
if (count > info->i2c_info.buflen)
count = info->i2c_info.buflen;
if (count > SEC_NFC_MSG_MAX_SIZE) {
dev_err(info->dev, "user required wrong size :%d\n", (u32)count);
ret = -EINVAL;
goto out;
}
mutex_lock(&info->i2c_info.read_mutex);
memset(info->i2c_info.buf, 0, count);
ret = i2c_master_recv(info->i2c_info.i2c_dev, info->i2c_info.buf, (u32)count);
dev_dbg(info->dev, "recv size : %d\n", ret);
if (ret == -EREMOTEIO) {
ret = -ERESTART;
goto read_error;
} else if (ret != count) {
dev_err(info->dev, "read failed: return: %d count: %d\n",
ret, (u32)count);
/* ret = -EREMOTEIO; */
goto read_error;
}
if (info->i2c_info.read_irq >= SEC_NFC_INT)
info->i2c_info.read_irq--;
if (info->i2c_info.read_irq == SEC_NFC_READ_TIMES)
wake_up_interruptible(&info->i2c_info.read_wait);
mutex_unlock(&info->i2c_info.read_mutex);
if (copy_to_user(buf, info->i2c_info.buf, ret)) {
dev_err(info->dev, "copy failed to user\n");
ret = -EFAULT;
}
goto out;
read_error:
info->i2c_info.read_irq = SEC_NFC_NONE;
mutex_unlock(&info->i2c_info.read_mutex);
out:
mutex_unlock(&info->mutex);
return ret;
}
static ssize_t sec_nfc_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
int ret = 0;
dev_dbg(info->dev, "%s: info: %p, count %d\n", __func__,
info, (u32)count);
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
dev_err(info->dev, "sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
if (count > info->i2c_info.buflen)
count = info->i2c_info.buflen;
if (count > SEC_NFC_MSG_MAX_SIZE) {
dev_err(info->dev, "user required wrong size :%d\n", (u32)count);
ret = -EINVAL;
goto out;
}
if (copy_from_user(info->i2c_info.buf, buf, count)) {
dev_err(info->dev, "copy failed from user\n");
ret = -EFAULT;
goto out;
}
/* Skip interrupt during power switching
* It is released after first write
*/
mutex_lock(&info->i2c_info.read_mutex);
ret = i2c_master_send(info->i2c_info.i2c_dev, info->i2c_info.buf, count);
if (info->i2c_info.read_irq == SEC_NFC_SKIP)
info->i2c_info.read_irq = SEC_NFC_NONE;
mutex_unlock(&info->i2c_info.read_mutex);
if (ret == -EREMOTEIO) {
dev_err(info->dev, "send failed: return: %d count: %d\n",
ret, (u32)count);
ret = -ERESTART;
goto out;
}
if (ret != count) {
dev_err(info->dev, "send failed: return: %d count: %d\n",
ret, (u32)count);
ret = -EREMOTEIO;
}
out:
mutex_unlock(&info->mutex);
return ret;
}
static unsigned int sec_nfc_poll(struct file *file, poll_table *wait)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
enum sec_nfc_irq irq;
int ret = 0;
dev_dbg(info->dev, "%s: info: %p\n", __func__, info);
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
dev_err(info->dev, "sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
poll_wait(file, &info->i2c_info.read_wait, wait);
mutex_lock(&info->i2c_info.read_mutex);
irq = info->i2c_info.read_irq;
if (irq == SEC_NFC_READ_TIMES)
ret = (POLLIN | POLLRDNORM);
mutex_unlock(&info->i2c_info.read_mutex);
out:
mutex_unlock(&info->mutex);
return ret;
}
void sec_nfc_i2c_irq_clear(struct sec_nfc_info *info)
{
/* clear interrupt. Interrupt will be occurred at power off */
mutex_lock(&info->i2c_info.read_mutex);
info->i2c_info.read_irq = SEC_NFC_NONE;
mutex_unlock(&info->i2c_info.read_mutex);
}
int sec_nfc_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct sec_nfc_info *info = dev_get_drvdata(dev);
struct sec_nfc_platform_data *pdata = info->pdata;
int ret;
pr_info("%s: start: %p\n", __func__, info);
info->i2c_info.buflen = SEC_NFC_MAX_BUFFER_SIZE;
info->i2c_info.buf = kzalloc(SEC_NFC_MAX_BUFFER_SIZE, GFP_KERNEL);
if (!info->i2c_info.buf) {
dev_err(dev, "failed to allocate memory for sec_nfc_info->buf\n");
return -ENOMEM;
}
info->i2c_info.i2c_dev = client;
info->i2c_info.read_irq = SEC_NFC_NONE;
mutex_init(&info->i2c_info.read_mutex);
init_waitqueue_head(&info->i2c_info.read_wait);
i2c_set_clientdata(client, info);
info->dev = dev;
ret = gpio_request(pdata->irq, "nfc_int");
if (ret) {
pr_err("GPIO request is failed to register IRQ\n");
goto err_irq_req;
}
client->irq = gpio_to_irq(pdata->irq);
pr_info("%s: push interrupt no = %d\n", __func__, client->irq);
ret = request_threaded_irq(client->irq, NULL, sec_nfc_irq_thread_fn,
IRQF_TRIGGER_RISING | IRQF_ONESHOT, SEC_NFC_DRIVER_NAME,
info);
if (ret < 0) {
pr_err("failed to register IRQ handler\n");
kfree(info->i2c_info.buf);
return ret;
}
pr_info("%s success\n", __func__);
return 0;
err_irq_req:
return ret;
}
void sec_nfc_i2c_remove(struct device *dev)
{
struct sec_nfc_info *info = dev_get_drvdata(dev);
struct i2c_client *client = info->i2c_info.i2c_dev;
struct sec_nfc_platform_data *pdata = info->pdata;
free_irq(client->irq, info);
gpio_free(pdata->irq);
}
#endif /* CONFIG_SEC_NFC_IF_I2C */
#ifdef CONFIG_SEC_NFC_GPIO_CLK
static irqreturn_t sec_nfc_clk_irq_thread(int irq, void *dev_id)
{
struct sec_nfc_info *info = dev_id;
struct sec_nfc_platform_data *pdata = info->pdata;
bool value;
dev_dbg(info->dev, "[NFC]Clock Interrupt is occurred!\n");
value = gpio_get_value(pdata->clk_req) > 0 ? true : false;
if (value == info->clk_state)
return IRQ_HANDLED;
if (value)
clk_prepare_enable(pdata->clk);
else
clk_disable_unprepare(pdata->clk);
info->clk_state = value;
return IRQ_HANDLED;
}
void sec_nfc_clk_ctl_enable(struct sec_nfc_info *info)
{
struct sec_nfc_platform_data *pdata = info->pdata;
unsigned int irq;
int ret;
irq = gpio_to_irq(pdata->clk_req);
if (info->clk_ctl)
return;
info->clk_state = false;
ret = request_threaded_irq(irq, NULL, sec_nfc_clk_irq_thread,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
SEC_NFC_DRIVER_NAME, info);
if (ret < 0)
dev_err(info->dev, "failed to register CLK REQ IRQ handler\n");
info->clk_ctl = true;
}
void sec_nfc_clk_ctl_disable(struct sec_nfc_info *info)
{
struct sec_nfc_platform_data *pdata = info->pdata;
unsigned int irq;
if (pdata->clk_req)
irq = gpio_to_irq(pdata->clk_req);
else
return;
if (!info->clk_ctl)
return;
free_irq(irq, info);
if (info->clk_state)
clk_disable_unprepare(pdata->clk);
info->clk_state = false;
info->clk_ctl = false;
}
#else
#define sec_nfc_clk_ctl_enable(x)
#define sec_nfc_clk_ctl_disable(x)
#endif /* CONFIG_SEC_NFC_GPIO_CLK */
static void sec_nfc_set_mode(struct sec_nfc_info *info,
enum sec_nfc_mode mode)
{
struct sec_nfc_platform_data *pdata = info->pdata;
#ifdef CONFIG_SEC_ESE_COLDRESET
int alreadFirmHigh = 0;
int ret ;
enum sec_nfc_mode oldmode = info->mode;
#endif
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
unsigned int val = readl(info->clkctrl);
#endif
/* intfo lock is aleady gotten before calling this function */
if (info->mode == mode) {
pr_err("Power mode is already %d", mode);
return;
}
info->mode = mode;
#ifdef CONFIG_SEC_NFC_IF_I2C
/* Skip interrupt during power switching
* It is released after first write */
mutex_lock(&info->i2c_info.read_mutex);
#ifdef CONFIG_SEC_ESE_COLDRESET
cur_mode = mode;
memset(sleep_wakeup_state, false, sizeof(sleep_wakeup_state));
if (oldmode == SEC_NFC_MODE_OFF) {
if (gpio_get_value(pdata->firm) == 1) {
alreadFirmHigh = 1;
pr_err("Firm is already high; do not anything");
} else { /*Firm pin is low*/
gpio_set_value(pdata->firm, SEC_NFC_FW_ON);
msleep(SEC_NFC_VEN_WAIT_TIME);
}
if (gpio_get_value(pdata->ven) == SEC_NFC_PW_ON) {
ret = i2c_master_send(info->i2c_info.i2c_dev, disable_combo_reset_cmd,
sizeof(disable_combo_reset_cmd)/sizeof(u8));
pr_err("disable combo_reset_command ret: %d", ret);
} else {
pr_err("skip disable combo_reset_command");
}
if (alreadFirmHigh == 1) {
pr_err("Firm is already high; do not anything2");
} else { /*Firm pin is low*/
mdelay(3); /*wait for FW*/
gpio_set_value(pdata->firm, SEC_NFC_FW_OFF);
}
}
#endif
info->i2c_info.read_irq = SEC_NFC_SKIP;
mutex_unlock(&info->i2c_info.read_mutex);
#endif
#ifdef CONFIG_SEC_ESE_COLDRESET
mdelay(1);
pr_err("FIRMWARE_GUARD_TIME(+1ms) in PW_OFF(total:4ms)\n");
#endif
gpio_set_value(pdata->ven, SEC_NFC_PW_OFF);
if (pdata->firm)
gpio_set_value(pdata->firm, SEC_NFC_FW_OFF);
if (mode == SEC_NFC_MODE_BOOTLOADER)
if (pdata->firm)
gpio_set_value(pdata->firm, SEC_NFC_FW_ON);
if (mode != SEC_NFC_MODE_OFF) {
msleep(SEC_NFC_VEN_WAIT_TIME);
gpio_set_value(pdata->ven, SEC_NFC_PW_ON);
sec_nfc_clk_ctl_enable(info);
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
val |= 0xC0000000;
writel(val, info->clkctrl);
#endif
#ifdef CONFIG_SEC_NFC_IF_I2C
enable_irq_wake(info->i2c_info.i2c_dev->irq);
#endif
msleep(SEC_NFC_VEN_WAIT_TIME/2);
} else {
#ifdef CONFIG_SEC_ESE_COLDRESET
int PW_OFF_DURATION = 20;
struct timespec t0, t1;
getnstimeofday(&t0);
mdelay(PW_OFF_DURATION);
if (is_shutdown == false)
gpio_set_value(pdata->ven, SEC_NFC_PW_ON);
getnstimeofday(&t1);
pr_err("DeepStby: PW_OFF duration (%d)ms, real PW_OFF duration is (%ld-%ld)ms\n",
PW_OFF_DURATION ,t0.tv_nsec*1000, t1.tv_nsec*1000);
pr_err("DeepStby: enter DeepStby(PW_ON)\n");
#endif
sec_nfc_clk_ctl_disable(info);
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
val &= ~0xC0000000;
writel(val, info->clkctrl);
#endif
#ifdef CONFIG_SEC_NFC_IF_I2C
disable_irq_wake(info->i2c_info.i2c_dev->irq);
#endif
}
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
if (wake_lock_active(&info->nfc_wake_lock))
wake_unlock(&info->nfc_wake_lock);
#endif
pr_info("%s NFC mode is : %d\n", __func__, mode);
}
#ifdef CONFIG_SEC_ESE_COLDRESET
struct cold_reset_gpio {
int firm_gpio;
int coldreset_gpio;
};
struct cold_reset_gpio cold_reset_gpio_data;
void init_coldreset_mutex(void)
{
mutex_init(&coldreset_mutex);
}
void init_sleep_wake_mutex(void)
{
mutex_init(&sleep_wake_mutex);
}
void check_and_sleep_nfc(unsigned int gpio, int value) {
if (sleep_wakeup_state[IDX_SLEEP_WAKEUP_NFC] == true ||
sleep_wakeup_state[IDX_SLEEP_WAKEUP_ESE] == true) {
pr_info("%s keep wake up state\n", __func__);
return;
}
gpio_set_value(gpio, value);
}
int trig_cold_reset_id(int id)
{
int wakeup_delay = 20;
int duration = 18;
struct timespec t0, t1, t2;
int isFirmHigh = 0;
if (id == ESE_ID)
mutex_lock(&coldreset_mutex);
getnstimeofday(&t0);
if (gpio_get_value(cold_reset_gpio_data.firm_gpio) == 1) {
isFirmHigh = 1;
} else {
gpio_set_value(cold_reset_gpio_data.firm_gpio, SEC_NFC_FW_ON);
mdelay(wakeup_delay);
}
getnstimeofday(&t1);
gpio_set_value(cold_reset_gpio_data.coldreset_gpio, SEC_NFC_COLDRESET_ON);
mdelay(duration);
gpio_set_value(cold_reset_gpio_data.coldreset_gpio, SEC_NFC_COLDRESET_OFF);
getnstimeofday(&t2);
if (isFirmHigh == 1)
pr_err("COLDRESET: FW_PIN already high, do not FW_OFF\n");
else
gpio_set_value(cold_reset_gpio_data.firm_gpio, SEC_NFC_FW_OFF);
pr_err("COLDRESET: FW_ON time (%ld-%ld)\n", t0.tv_nsec*1000, t1.tv_nsec*1000);
pr_err("COLDRESET: GPIO3 ON time (%ld-%ld)\n", t1.tv_nsec*1000, t2.tv_nsec*1000);
if (id == ESE_ID)
mutex_unlock(&coldreset_mutex);
pr_err("COLDRESET: exit");
return 0;
}
extern int trig_cold_reset(void) // Called from eSE driver
{
pr_info("%s trig_cold_reset\n", __func__);
return trig_cold_reset_id(ESE_ID);
}
EXPORT_SYMBOL(trig_cold_reset);
extern int trig_nfc_wakeup(void)
{
pr_info("%s trig_nfc_wakeup\n", __func__);
if (cur_mode == SEC_NFC_MODE_OFF || cur_mode == SEC_NFC_MODE_BOOTLOADER) {
pr_err("nfc mode not support to wake up");
return -EPERM;;
}
mutex_lock(&sleep_wake_mutex);
gpio_set_value(cold_reset_gpio_data.firm_gpio, SEC_NFC_WAKE_UP);
sleep_wakeup_state[IDX_SLEEP_WAKEUP_ESE] = true;
mutex_unlock(&sleep_wake_mutex);
return 0;
}
EXPORT_SYMBOL(trig_nfc_wakeup);
extern int trig_nfc_sleep(void)
{
pr_info("%s trig_nfc_sleep\n", __func__);
if (cur_mode == SEC_NFC_MODE_OFF || cur_mode == SEC_NFC_MODE_BOOTLOADER) {
pr_err("nfc mode not support to sleep");
return -EPERM;;
}
mutex_lock(&sleep_wake_mutex);
sleep_wakeup_state[IDX_SLEEP_WAKEUP_ESE] = false;
check_and_sleep_nfc(cold_reset_gpio_data.firm_gpio, SEC_NFC_WAKE_SLEEP);
mutex_unlock(&sleep_wake_mutex);
return 0;
}
EXPORT_SYMBOL(trig_nfc_sleep);
#endif
static long sec_nfc_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
struct sec_nfc_platform_data *pdata = info->pdata;
unsigned int new = (unsigned int)arg;
int ret = 0;
dev_dbg(info->dev, "%s: info: %p, cmd: 0x%x\n",
__func__, info, cmd);
mutex_lock(&info->mutex);
#ifdef CONFIG_SEC_ESE_COLDRESET
mutex_lock(&coldreset_mutex);
#endif
switch (cmd) {
case SEC_NFC_SET_MODE:
if (info->mode == new)
break;
if (new >= SEC_NFC_MODE_COUNT) {
dev_err(info->dev, "wrong mode (%d)\n", new);
ret = -EFAULT;
break;
}
sec_nfc_set_mode(info, new);
break;
#if defined(CONFIG_SEC_NFC_PRODUCT_N3)
case SEC_NFC_SLEEP:
case SEC_NFC_WAKEUP:
break;
#elif defined(CONFIG_SEC_NFC_PRODUCT_N5) || defined(CONFIG_SEC_NFC_PRODUCT_N7)
case SEC_NFC_SLEEP:
if (info->mode != SEC_NFC_MODE_BOOTLOADER) {
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
if (wake_lock_active(&info->nfc_wake_lock))
wake_unlock(&info->nfc_wake_lock);
#endif
#ifdef CONFIG_SEC_ESE_COLDRESET
mutex_lock(&sleep_wake_mutex);
sleep_wakeup_state[IDX_SLEEP_WAKEUP_NFC] = false;
check_and_sleep_nfc(pdata->wake, SEC_NFC_WAKE_SLEEP);
mutex_unlock(&sleep_wake_mutex);
#else
gpio_set_value(pdata->wake, SEC_NFC_WAKE_SLEEP);
#endif
}
break;
case SEC_NFC_WAKEUP:
if (info->mode != SEC_NFC_MODE_BOOTLOADER) {
gpio_set_value(pdata->wake, SEC_NFC_WAKE_UP);
#ifdef CONFIG_SEC_ESE_COLDRESET
sleep_wakeup_state[IDX_SLEEP_WAKEUP_NFC] = true;
#endif
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
if (!wake_lock_active(&info->nfc_wake_lock))
wake_lock(&info->nfc_wake_lock);
#endif
}
break;
#endif
#ifdef CONFIG_SEC_ESE_COLDRESET
case SEC_NFC_COLD_RESET:
trig_cold_reset_id(DEVICEHOST_ID);
break;
case SEC_NFC_SHUTDOWN:
is_shutdown = true;
break;
#endif
default:
dev_err(info->dev, "Unknown ioctl 0x%x\n", cmd);
ret = -ENOIOCTLCMD;
break;
}
#ifdef CONFIG_SEC_ESE_COLDRESET
mutex_unlock(&coldreset_mutex);
#endif
mutex_unlock(&info->mutex);
return ret;
}
static int sec_nfc_open(struct inode *inode, struct file *file)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
struct sec_nfc_platform_data *pdata = info->pdata;
int ret = 0;
pr_info("%s info : %p\n", __func__, info);
if (!pdata) {
pr_err("%s pdata is Null!\n", __func__);
return -ENOMEM;
}
#ifdef CONFIG_SEC_NFC_LDO_EN
ret = gpio_request(pdata->pvdd_en, "ldo_en");
if (ret < 0) {
pr_err("failed to request about pvdd_en pin\n");
goto err_dev_reg;
}
gpio_direction_output(pdata->pvdd_en, NFC_I2C_LDO_ON);
pr_info("pvdd en: %d\n", gpio_get_value(pdata->pvdd_en));
#endif
#ifdef CONFIG_SEC_NFC_PMIC_LDO
pdata->pvdd_regulator = regulator_get(NULL, pdata->pvdd_regulator_name);
if (IS_ERR(pdata->pvdd_regulator))
pr_err("%s: Failed to get %s pmic regulator.\n", __func__, pdata->pvdd_regulator);
ret = regulator_enable(pdata->pvdd_regulator);
#endif
mutex_lock(&info->mutex);
if (info->mode != SEC_NFC_MODE_OFF) {
dev_err(info->dev, "sec_nfc is busy\n");
ret = -EBUSY;
goto out;
}
sec_nfc_set_mode(info, SEC_NFC_MODE_OFF);
out:
mutex_unlock(&info->mutex);
return ret;
}
static int sec_nfc_close(struct inode *inode, struct file *file)
{
struct sec_nfc_info *info = container_of(file->private_data,
struct sec_nfc_info, miscdev);
pr_info("%s: info : %p\n", __func__, info);
mutex_lock(&info->mutex);
sec_nfc_set_mode(info, SEC_NFC_MODE_OFF);
mutex_unlock(&info->mutex);
return 0;
}
static const struct file_operations sec_nfc_fops = {
.owner = THIS_MODULE,
.read = sec_nfc_read,
.write = sec_nfc_write,
.poll = sec_nfc_poll,
.open = sec_nfc_open,
.release = sec_nfc_close,
.unlocked_ioctl = sec_nfc_ioctl,
};
#ifdef CONFIG_PM
static int sec_nfc_suspend(struct device *dev)
{
struct sec_nfc_info *info = SEC_NFC_GET_INFO(dev);
int ret = 0;
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_BOOTLOADER)
ret = -EPERM;
mutex_unlock(&info->mutex);
return ret;
}
static int sec_nfc_resume(struct device *dev)
{
return 0;
}
static SIMPLE_DEV_PM_OPS(sec_nfc_pm_ops, sec_nfc_suspend, sec_nfc_resume);
#endif
#ifdef CONFIG_OF
/*device tree parsing*/
static int sec_nfc_parse_dt(struct device *dev,
struct sec_nfc_platform_data *pdata)
{
struct device_node *np = dev->of_node;
pdata->ven = of_get_named_gpio(np, "sec-nfc,ven-gpio", 0);
pdata->firm = of_get_named_gpio(np, "sec-nfc,firm-gpio", 0);
pdata->wake = pdata->firm;
#ifdef CONFIG_SEC_NFC_IF_I2C
pdata->irq = of_get_named_gpio(np, "sec-nfc,irq-gpio", 0);
#endif
#ifdef CONFIG_SEC_ESE_COLDRESET
pdata->coldreset = of_get_named_gpio(np, "sec-nfc,coldreset-gpio",0);
cold_reset_gpio_data.firm_gpio = pdata->firm;
cold_reset_gpio_data.coldreset_gpio = pdata->coldreset;
#endif
#ifdef CONFIG_SEC_NFC_LDO_EN
pdata->pvdd_en = of_get_named_gpio(np, "sec-nfc,ldo_en",0);
#endif
#ifdef CONFIG_SEC_NFC_PMIC_LDO
if (of_property_read_string(np, "sec-nfc,pmic-ldo", &pdata->pvdd_regulator_name))
pr_err("%s: Failed to get %s regulator.\n", __func__, pdata->pvdd_regulator_name);
#endif
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
if(of_property_read_u32(np, "clkctrl-reg", (u32 *)&pdata->clkctrl_addr))
return -EINVAL;
#endif
#ifdef CONFIG_SEC_NFC_GPIO_CLK
pdata->clk_req = of_get_named_gpio(np, "sec-nfc,clk_req-gpio", 0);
pdata->clk = clk_get(dev, "OSC_NFC");
#endif
pr_info("%s: irq : %d, ven : %d, firm : %d\n",
__func__, pdata->irq, pdata->ven, pdata->firm);
return 0;
}
#else /* CONFIG_OF */
static int sec_nfc_parse_dt(struct device *dev,
struct sec_nfc_platform_data *pdata)
{
return -ENODEV;
}
#endif
static int __sec_nfc_probe(struct device *dev)
{
struct sec_nfc_info *info;
struct sec_nfc_platform_data *pdata = NULL;
int ret = 0;
pr_info("%s : start\n", __func__);
if (dev->of_node) {
pdata = devm_kzalloc(dev, sizeof(struct sec_nfc_platform_data), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
ret = sec_nfc_parse_dt(dev, pdata);
if (ret)
return ret;
} else {
pdata = dev->platform_data;
}
if (!pdata) {
dev_err(dev, "No platform data\n");
ret = -ENOMEM;
goto err_pdata;
}
info = kzalloc(sizeof(struct sec_nfc_info), GFP_KERNEL);
if (!info) {
ret = -ENOMEM;
goto err_info_alloc;
}
info->dev = dev;
info->pdata = pdata;
info->mode = SEC_NFC_MODE_OFF;
mutex_init(&info->mutex);
dev_set_drvdata(dev, info);
info->miscdev.minor = MISC_DYNAMIC_MINOR;
info->miscdev.name = SEC_NFC_DRIVER_NAME;
info->miscdev.fops = &sec_nfc_fops;
info->miscdev.parent = dev;
ret = misc_register(&info->miscdev);
if (ret < 0) {
dev_err(dev, "failed to register Device\n");
goto err_dev_reg;
}
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
if (pdata->clkctrl_addr != 0) {
//info->clkctrl = ioremap_nocache(pdata->clkctrl_addr, 0x80);
info->clkctrl = ioremap_wc(pdata->clkctrl_addr, 0x80);
if (!info->clkctrl) {
dev_err(dev, "cannot remap nfc clock register\n");
ret = -ENXIO;
goto err_iomap;
}
}
#endif
ret = gpio_request(pdata->ven, "nfc_ven");
if (ret) {
dev_err(dev, "failed to get gpio ven\n");
goto err_gpio_ven;
}
gpio_direction_output(pdata->ven, SEC_NFC_FW_OFF);
if (pdata->firm) {
ret = gpio_request(pdata->firm, "nfc_firm");
if (ret) {
dev_err(dev, "failed to get gpio firm\n");
goto err_gpio_firm;
}
gpio_direction_output(pdata->firm, SEC_NFC_FW_OFF);
}
#ifdef CONFIG_SEC_ESE_COLDRESET
init_coldreset_mutex();
init_sleep_wake_mutex();
memset(sleep_wakeup_state, false, sizeof(sleep_wakeup_state));
ret = gpio_request(pdata->coldreset, "nfc_coldreset");
if (ret) {
dev_err(dev, "failed to get gpio coldreset(NFC-GPIO3)\n");
goto err_gpio_coldreset;
}
gpio_direction_output(pdata->coldreset, SEC_NFC_COLDRESET_OFF);
#endif
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
wake_lock_init(&info->nfc_wake_lock, WAKE_LOCK_SUSPEND, "nfc_wake_lock");
#endif
dev_info(dev, "%s: success info: %p, pdata %p\n", __func__, info, pdata);
return 0;
#ifdef CONFIG_SEC_ESE_COLDRESET
err_gpio_coldreset:
gpio_free(pdata->coldreset);
#endif
err_gpio_firm:
gpio_free(pdata->ven);
err_gpio_ven:
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
iounmap(info->clkctrl);
err_iomap:
#endif
err_dev_reg:
mutex_destroy(&info->mutex);
kfree(info);
err_info_alloc:
devm_kfree(dev, pdata);
err_pdata:
return ret;
}
static int __sec_nfc_remove(struct device *dev)
{
struct sec_nfc_info *info = dev_get_drvdata(dev);
struct i2c_client *client = info->i2c_info.i2c_dev;
struct sec_nfc_platform_data *pdata = info->pdata;
dev_dbg(info->dev, "%s\n", __func__);
#ifdef CONFIG_SEC_NFC_GPIO_CLK
if (pdata->clk)
clk_unprepare(pdata->clk);
#endif
misc_deregister(&info->miscdev);
sec_nfc_set_mode(info, SEC_NFC_MODE_OFF);
free_irq(client->irq, info);
gpio_free(pdata->irq);
gpio_set_value(pdata->firm, 0);
gpio_free(pdata->ven);
if (pdata->firm)
gpio_free(pdata->firm);
#ifdef CONFIG_SEC_NFC_WAKE_LOCK
wake_lock_destroy(&info->nfc_wake_lock);
#endif
kfree(info);
return 0;
}
#ifdef CONFIG_SEC_NFC_IF_I2C
static struct i2c_device_id sec_nfc_id_table[] = {
{ SEC_NFC_DRIVER_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sec_nfc_id_table);
typedef struct i2c_driver sec_nfc_driver_type;
#define SEC_NFC_INIT(driver) i2c_add_driver(driver)
#define SEC_NFC_EXIT(driver) i2c_del_driver(driver)
static int sec_nfc_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0;
ret = __sec_nfc_probe(&client->dev);
if (ret)
return ret;
if (sec_nfc_i2c_probe(client))
__sec_nfc_remove(&client->dev);
return ret;
}
static int sec_nfc_remove(struct i2c_client *client)
{
sec_nfc_i2c_remove(&client->dev);
return __sec_nfc_remove(&client->dev);
}
#else /* CONFIG_SEC_NFC_IF_I2C */
MODULE_DEVICE_TABLE(platform, sec_nfc_id_table);
typedef struct platform_driver sec_nfc_driver_type;
#define SEC_NFC_INIT(driver) platform_driver_register(driver);
#define SEC_NFC_EXIT(driver) platform_driver_unregister(driver);
static int sec_nfc_probe(struct platform_device *pdev)
{
return __sec_nfc_probe(&pdev->dev);
}
static int sec_nfc_remove(struct platform_device *pdev)
{
return __sec_nfc_remove(&pdev->dev);
}
static struct platform_device_id sec_nfc_id_table[] = {
{ SEC_NFC_DRIVER_NAME, 0 },
{ }
};
#endif /* CONFIG_SEC_NFC_IF_I2C */
#ifdef CONFIG_OF
static const struct of_device_id nfc_match_table[] = {
{ .compatible = SEC_NFC_DRIVER_NAME,},
{},
};
#else /* CONFIG_OF */
#define nfc_match_table NULL
#endif
static struct i2c_driver sec_nfc_driver = {
.probe = sec_nfc_probe,
.id_table = sec_nfc_id_table,
.remove = sec_nfc_remove,
.driver = {
.name = SEC_NFC_DRIVER_NAME,
#ifdef CONFIG_PM
.pm = &sec_nfc_pm_ops,
#endif
.of_match_table = nfc_match_table,
},
};
static int __init sec_nfc_init(void)
{
return SEC_NFC_INIT(&sec_nfc_driver);
}
static void __exit sec_nfc_exit(void)
{
SEC_NFC_EXIT(&sec_nfc_driver);
}
module_init(sec_nfc_init);
module_exit(sec_nfc_exit);
MODULE_SOFTDEP("pre: i2c-exynos5");
MODULE_DESCRIPTION("Samsung sec_nfc driver");
MODULE_LICENSE("GPL");
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