aubrey/kernel_samsung_a34x-permissive
1
0
Fork 0
Code Issues Pull requests Actions Packages Projects Releases Wiki Activity
kernel_samsung_a34x-permissive/drivers/nfc/sec_nfc.c

1613 lines
39 KiB
C
Raw Normal View History

Import A346BXXU1AWB9 kernel source Android 13
2024-04-28 06:49:01 -07:00
/*
* 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;
*
*/
/* duplicated #define pr_fmt(fmt) "[sec_nfc] %s: " fmt, __func__*/
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/kernel.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 <linux/uaccess.h>
#include <linux/clk-provider.h>
#include <linux/interrupt.h>
#include <linux/of_gpio.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/i2c.h>
#include <linux/ktime.h>
#if defined(CONFIG_ESE_SECURE) && defined(CONFIG_ESE_USE_TZ_API)
extern int tz_tee_ese_secure_check(void);
enum secure_state {
NOT_CHECKED,
ESE_SECURED,
ESE_NOT_SECURED,
};
int nfc_ese_secured;
#endif
#include "nfc_wakelock.h"
#include "sec_nfc.h"
#ifdef CONFIG_SEC_NFC_LOGGER
#include "./nfc_logger/nfc_logger.h"
#endif
#define SEC_NFC_GET_INFO(dev) i2c_get_clientdata(to_i2c_client(dev))
static int nfc_param_lpcharge = LPM_NO_SUPPORT;
module_param(nfc_param_lpcharge, int, 0440);
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;
};
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;
struct nfc_wake_lock nfc_wake_lock;
struct nfc_wake_lock nfc_clk_wake_lock;
bool clk_ctl;
bool clk_state;
struct platform_device *pdev;
};
#ifdef CONFIG_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};
enum sec_nfc_mode cur_mode;
#endif
static struct sec_nfc_info *g_nfc_info;
#define FEATURE_SEC_NFC_TEST
#ifdef FEATURE_SEC_NFC_TEST
static bool on_nfc_test;
static bool nfc_int_wait;
#endif
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;
NFC_LOG_REC("irq\n");
#ifdef FEATURE_SEC_NFC_TEST
if (on_nfc_test) {
nfc_int_wait = true;
NFC_LOG_INFO("NFC_TEST: interrupt is raised\n");
wake_up_interruptible(&info->i2c_info.read_wait);
return IRQ_HANDLED;
}
#endif
if (gpio_get_value(pdata->irq) == 0) {
NFC_LOG_REC("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) {
NFC_LOG_REC("Now power swiching. Skip this IRQ\n");
mutex_unlock(&info->i2c_info.read_mutex);
return IRQ_HANDLED;
}
info->i2c_info.read_irq += SEC_NFC_READ_TIMES;
#ifdef CONFIG_SEC_NFC_DUPLICATED_IRQ_WQ_LSI
if (info->i2c_info.read_irq >= SEC_NFC_READ_TIMES * 2) {
NFC_LOG_ERR("AP called duplicated IRQ handler\n");
info->i2c_info.read_irq -= SEC_NFC_READ_TIMES;
mutex_unlock(&info->i2c_info.read_mutex);
return IRQ_HANDLED;
}
#endif
mutex_unlock(&info->i2c_info.read_mutex);
wake_up_interruptible(&info->i2c_info.read_wait);
wake_lock_timeout(&info->nfc_wake_lock, 2*HZ);
return IRQ_HANDLED;
}
static int nfc_state_print(struct sec_nfc_info *info)
{
struct sec_nfc_platform_data *pdata = info->pdata;
struct regulator *regulator_nfc_pvdd;
int en = gpio_get_value(info->pdata->ven);
int firm = gpio_get_value_cansleep(info->pdata->firm);
int irq = gpio_get_value(info->pdata->irq);
int pvdd = 0;
if (pdata->nfc_pvdd != NULL) {
regulator_nfc_pvdd = pdata->nfc_pvdd;
pvdd = regulator_is_enabled(regulator_nfc_pvdd);
} else {
pvdd = gpio_get_value(info->pdata->pvdd);
}
NFC_LOG_INFO("en(%d) firm(%d) pvdd(%d) irq(%d) mode(%d) clk_state(%d)\n",
en, firm, pvdd, irq, info->mode, info->clk_state);
return 0;
}
void sec_nfc_print_status(void)
{
if (g_nfc_info)
nfc_state_print(g_nfc_info);
}
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;
#ifdef FEATURE_SEC_NFC_TEST
if (on_nfc_test)
return 0;
#endif
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
NFC_LOG_ERR("read() 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) {
NFC_LOG_ERR("read() 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) {
NFC_LOG_ERR("read() user required wrong size :%d\n", (u32)count);
ret = -EINVAL;
goto out;
}
NFC_LOG_REC("read(%zu)\n", count);
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);
if (ret == -EREMOTEIO) {
ret = -ERESTART;
goto read_error;
} else if (ret != count) {
NFC_LOG_ERR("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)) {
NFC_LOG_ERR("read() copy failed to user\n");
ret = -EFAULT;
}
goto out;
read_error:
NFC_LOG_ERR("read error %d\n", ret);
nfc_state_print(info);
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;
NFC_LOG_DBG("write() count %d\n", (u32)count);
#ifdef FEATURE_SEC_NFC_TEST
if (on_nfc_test)
return 0;
#endif
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
NFC_LOG_ERR("write() 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) {
NFC_LOG_ERR("write() user required wrong size :%d\n", (u32)count);
ret = -EINVAL;
goto out;
}
if (copy_from_user(info->i2c_info.buf, buf, count)) {
NFC_LOG_ERR("write() copy failed from user\n");
ret = -EFAULT;
goto out;
}
/* Skip interrupt during power switching
* It is released after first write
*/
NFC_LOG_REC("write(%d)\n", count);
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) {
NFC_LOG_ERR("write failed: return: %d count: %d\n",
ret, (u32)count);
ret = -ERESTART;
goto write_error;
}
if (ret != count) {
NFC_LOG_ERR("write failed: return: %d count: %d\n",
ret, (u32)count);
ret = -EREMOTEIO;
goto write_error;
}
goto out;
write_error:
nfc_state_print(info);
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;
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
NFC_LOG_ERR("poll() 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;
}
static int sec_nfc_regulator_onoff(struct sec_nfc_platform_data *data, int onoff)
{
int rc = 0;
struct regulator *regulator_nfc_pvdd = data->nfc_pvdd;
if (!regulator_nfc_pvdd) {
NFC_LOG_ERR("error: null regulator!\n");
rc = -ENODEV;
goto done;
}
NFC_LOG_INFO("regulator onoff = %d\n", onoff);
if (onoff == NFC_I2C_LDO_ON) {
rc = regulator_enable(regulator_nfc_pvdd);
if (rc) {
NFC_LOG_ERR("regulator enable nfc_pvdd failed, rc=%d\n", rc);
goto done;
}
} else {
rc = regulator_disable(regulator_nfc_pvdd);
if (rc) {
NFC_LOG_ERR("regulator disable nfc_pvdd failed, rc=%d\n", rc);
goto done;
}
}
NFC_LOG_INFO("success\n");
done:
return rc;
}
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;
NFC_LOG_INFO("probe() start\n");
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) {
NFC_LOG_ERR("probe() failed to allocate memory\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);
ret = gpio_request(pdata->irq, "nfc_int");
if (ret) {
NFC_LOG_ERR("probe() GPIO request is failed to register IRQ\n");
goto err_irq_req;
}
gpio_direction_input(pdata->irq);
ret = request_threaded_irq(client->irq, NULL, sec_nfc_irq_thread_fn,
#ifdef CONFIG_SEC_NFC_DUPLICATED_IRQ_WQ_QC
IRQF_TRIGGER_RISING | IRQF_ONESHOT | IRQF_NO_SUSPEND, SEC_NFC_DRIVER_NAME,
#else
IRQF_TRIGGER_RISING | IRQF_ONESHOT, SEC_NFC_DRIVER_NAME,
#endif
info);
if (ret < 0) {
NFC_LOG_ERR("probe() failed to register IRQ handler\n");
kfree(info->i2c_info.buf);
return ret;
}
if (of_get_property(dev->of_node, "sec-nfc,ldo_control", NULL)) {
if (pdata->nfc_pvdd != NULL) {
#if defined(CONFIG_NFC_PVDD_LATE_ENABLE)
if (nfc_param_lpcharge == LPM_FALSE) { /*pvdd enable in late init*/
#elif IS_ENABLED(CONFIG_BATTERY_SAMSUNG)
if (!lpcharge) {
#else
if (1/*!lpcharge*/) {
#endif
ret = sec_nfc_regulator_onoff(pdata, NFC_I2C_LDO_ON);
if (ret < 0)
NFC_LOG_ERR("regulator on failed: %d\n", ret);
if (of_find_property(dev->of_node, "sec-nfc,sw-gpio", NULL)) {
if (gpio_is_valid(pdata->i2c_switch)) {
ret = gpio_request(pdata->i2c_switch, "nfc_i2c_sw");
if (ret)
NFC_LOG_ERR("probe() i2c_swich gpio request failed\n");
gpio_direction_output(pdata->i2c_switch, 1);
}
}
#ifdef CONFIG_ESE_COLDRESET
msleep(25);
gpio_set_value(pdata->ven, SEC_NFC_PW_ON);
#else
usleep_range(1000, 1100);
#endif
} else {
#if defined(CONFIG_NFC_PVDD_LATE_ENABLE)
NFC_LOG_ERR("regulator off (late enable)\n");
#elif IS_ENABLED(CONFIG_BATTERY_SAMSUNG)
NFC_LOG_ERR("regulator off at LPM: %d\n", lpcharge);
#else
NFC_LOG_ERR("regulator off at LPM\n");
#endif
}
}
} else {
ret = gpio_request(pdata->pvdd, "nfc_pvdd");
if (ret)
NFC_LOG_ERR("probe() GPIO request is failed to register pvdd gpio\n");
gpio_direction_output(pdata->pvdd, 1);
}
NFC_LOG_INFO("probe() success\n");
return 0;
err_irq_req:
return ret;
}
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;
if (pdata->irq_all_trigger) {
value = gpio_get_value(pdata->clk_req) > 0 ? true : false;
NFC_LOG_REC("clk_req: %d < %d\n", value, info->clk_state);
if (value == info->clk_state)
return IRQ_HANDLED;
if (value) {
if (!wake_lock_active(&info->nfc_clk_wake_lock))
wake_lock(&info->nfc_clk_wake_lock);
if (pdata->clk && clk_prepare_enable(pdata->clk)) {
NFC_LOG_ERR("clock enable failed\n");
return IRQ_HANDLED;
}
} else {
if (pdata->clk)
clk_disable_unprepare(pdata->clk);
if (wake_lock_active(&info->nfc_clk_wake_lock))
wake_unlock(&info->nfc_clk_wake_lock);
}
info->clk_state = value;
} else {
wake_lock_timeout(&info->nfc_wake_lock, 2*HZ);
NFC_LOG_REC("clk_req irq\n");
}
return IRQ_HANDLED;
}
void sec_nfc_clk_ctl_enable(struct sec_nfc_info *info)
{
struct sec_nfc_platform_data *pdata = info->pdata;
if (info->clk_ctl)
return;
if (!pdata->clk)
return;
info->clk_state = false;
info->clk_ctl = true;
}
void sec_nfc_clk_ctl_disable(struct sec_nfc_info *info)
{
struct sec_nfc_platform_data *pdata = info->pdata;
if (wake_lock_active(&info->nfc_clk_wake_lock))
wake_unlock(&info->nfc_clk_wake_lock);
if (!info->clk_ctl)
return;
if (!pdata->clk)
return;
if (info->clk_state)
clk_disable_unprepare(pdata->clk);
info->clk_state = false;
info->clk_ctl = false;
}
static bool sec_nfc_check_pin_status(struct sec_nfc_platform_data *pdata,
enum sec_nfc_mode mode)
{
if (mode != SEC_NFC_MODE_OFF) {
if (pdata->ven) {
if (gpio_get_value(pdata->ven) != SEC_NFC_PW_ON)
return false;
}
}
if (mode == SEC_NFC_MODE_BOOTLOADER) {
if (pdata->firm) {
if (gpio_get_value_cansleep(pdata->firm) != SEC_NFC_FW_ON)
return false;
}
} else {
if (pdata->firm) {
if (gpio_get_value_cansleep(pdata->firm) != SEC_NFC_FW_OFF)
return false;
}
}
return true;
}
static void sec_nfc_set_mode(struct sec_nfc_info *info,
enum sec_nfc_mode mode)
{
struct sec_nfc_platform_data *pdata = info->pdata;
int retry_count = 3;
#ifdef CONFIG_ESE_COLDRESET
int alreadFirmHigh = 0;
int ret;
enum sec_nfc_mode oldmode = info->mode;
#endif
/* intfo lock is aleady gotten before calling this function */
if (info->mode == mode) {
NFC_LOG_DBG("power mode is already %d\n", mode);
return;
}
info->mode = mode;
/* Skip interrupt during power switching
* It is released after first write
*/
mutex_lock(&info->i2c_info.read_mutex);
info->i2c_info.read_irq = SEC_NFC_SKIP;
mutex_unlock(&info->i2c_info.read_mutex);
#ifdef CONFIG_ESE_COLDRESET
mutex_lock(&sleep_wake_mutex);
cur_mode = SEC_NFC_MODE_TURNING_ON_OFF;
mutex_unlock(&sleep_wake_mutex);
memset(sleep_wakeup_state, false, sizeof(sleep_wakeup_state));
if (oldmode == SEC_NFC_MODE_OFF) {
if (gpio_get_value_cansleep(pdata->firm) == 1) {
alreadFirmHigh = 1;
NFC_LOG_INFO("Firm is already high\n");
} else {/*Firm pin is low*/
gpio_set_value_cansleep(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));
NFC_LOG_INFO("disable combo_reset_command ret: %d\n", ret);
} else
NFC_LOG_INFO("skip disable combo_reset_command\n");
if (alreadFirmHigh == 1) {
NFC_LOG_INFO("Firm is already HIGH\n");
} else {/*Firm pin is low*/
usleep_range(3000, 3100);
gpio_set_value_cansleep(pdata->firm, SEC_NFC_FW_OFF);
}
}
#endif
#ifdef CONFIG_ESE_COLDRESET
usleep_range(1000, 1100);
NFC_LOG_INFO("FIRMWARE_GUARD_TIME(+1ms) in PW_OFF(total:4ms)\n");
#endif
pin_setting_retry:
gpio_direction_output(pdata->ven, SEC_NFC_PW_OFF);
if (pdata->firm)
gpio_direction_output(pdata->firm, SEC_NFC_FW_OFF);
if (mode == SEC_NFC_MODE_BOOTLOADER)
if (pdata->firm)
gpio_direction_output(pdata->firm, SEC_NFC_FW_ON);
if (mode != SEC_NFC_MODE_OFF) {
msleep(SEC_NFC_VEN_WAIT_TIME);
gpio_direction_output(pdata->ven, SEC_NFC_PW_ON);
sec_nfc_clk_ctl_enable(info);
nfc_state_print(info);
enable_irq_wake(info->i2c_info.i2c_dev->irq);
msleep(SEC_NFC_VEN_WAIT_TIME/2);
/* Workaround: FIRM or VEN is not set sometimes */
if (retry_count-- > 0 && !sec_nfc_check_pin_status(pdata, mode)) {
NFC_LOG_INFO("Pin setting retry\n");
sec_nfc_clk_ctl_disable(info);
disable_irq_wake(info->i2c_info.i2c_dev->irq);
goto pin_setting_retry;
}
#ifdef CONFIG_SEC_ESE_COLDRESET
mutex_lock(&sleep_wake_mutex);
cur_mode = mode;
mutex_unlock(&sleep_wake_mutex);
#endif
} else {
#ifdef CONFIG_ESE_COLDRESET
int PW_OFF_DURATION = 20;
ktime_t t0, t1;
t0 = ktime_get();
msleep(PW_OFF_DURATION);
gpio_set_value(pdata->ven, SEC_NFC_PW_ON);
t1 = ktime_get();
NFC_LOG_INFO("DeepStby: PW_OFF duration (%d)ms, real PW_OFF duration is (%ld-%ld)ms\n",
PW_OFF_DURATION, t0, t1);
NFC_LOG_INFO("DeepStby: enter DeepStby(PW_ON)\n");
mutex_lock(&sleep_wake_mutex);
cur_mode = mode;
mutex_unlock(&sleep_wake_mutex);
#endif
sec_nfc_clk_ctl_disable(info);
nfc_state_print(info);
disable_irq_wake(info->i2c_info.i2c_dev->irq);
}
if (wake_lock_active(&info->nfc_wake_lock))
wake_unlock(&info->nfc_wake_lock);
NFC_LOG_INFO("NFC mode is : %d\n", mode);
}
#ifdef CONFIG_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) {
NFC_LOG_INFO("%s keep wake up state\n", __func__);
return;
}
gpio_set_value_cansleep(gpio, value);
}
int trig_cold_reset_id(int id)
{
int wakeup_delay = 20;
int duration = 18;
ktime_t t0, t1, t2;
int isFirmHigh = 0;
NFC_LOG_INFO("COLDRESET: enter\n");
if (id == ESE_ID)
mutex_lock(&coldreset_mutex);
NFC_LOG_INFO("caller id:(%d) coldreset triggered. [wakeup_delay(%d), duration(%d))]\n", id, wakeup_delay, duration);
t0 = ktime_get();
if (gpio_get_value_cansleep(cold_reset_gpio_data.firm_gpio) == 1) {
isFirmHigh = 1;
} else {
gpio_set_value_cansleep(cold_reset_gpio_data.firm_gpio, SEC_NFC_FW_ON);
msleep(wakeup_delay);
}
t1 = ktime_get();
gpio_set_value(cold_reset_gpio_data.coldreset_gpio, SEC_NFC_COLDRESET_ON);
usleep_range(duration * 1000, duration * 1000 + 10);
gpio_set_value(cold_reset_gpio_data.coldreset_gpio, SEC_NFC_COLDRESET_OFF);
t2 = ktime_get();
if (isFirmHigh == 1)
NFC_LOG_INFO("COLDRESET: FW_PIN already high, do not FW_OFF\n");
else
gpio_set_value_cansleep(cold_reset_gpio_data.firm_gpio, SEC_NFC_FW_OFF);
NFC_LOG_INFO("COLDRESET: FW_ON time (%ld-%ld)\n", t0, t1);
NFC_LOG_INFO("COLDRESET: GPIO3 ON time (%ld-%ld)\n", t1, t2);
if (id == ESE_ID)
mutex_unlock(&coldreset_mutex);
NFC_LOG_INFO("COLDRESET: exit\n");
return 0;
}
extern int trig_cold_reset(void)
{ /*only called GTO*/
return trig_cold_reset_id(ESE_ID);
}
extern int trig_nfc_wakeup(void)
{
NFC_LOG_INFO("%s\n", __func__);
mutex_lock(&sleep_wake_mutex);
if (cur_mode != SEC_NFC_MODE_FIRMWARE) {
NFC_LOG_ERR("nfc mode not support to wake up\n");
mutex_unlock(&sleep_wake_mutex);
return -EPERM;
}
gpio_set_value_cansleep(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;
}
extern int trig_nfc_sleep(void)
{
NFC_LOG_INFO("%s\n", __func__);
mutex_lock(&sleep_wake_mutex);
if (cur_mode != SEC_NFC_MODE_FIRMWARE) {
NFC_LOG_ERR("nfc mode not support to sleep\n");
mutex_unlock(&sleep_wake_mutex);
return -EPERM;
}
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;
}
#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;
NFC_LOG_DBG("cmd: 0x%x\n", cmd);
mutex_lock(&info->mutex);
#ifdef CONFIG_ESE_COLDRESET
mutex_lock(&coldreset_mutex);
#endif
switch (cmd) {
case SEC_NFC_DEBUG:
NFC_LOG_ERR("SEC_NFC_DEBUG\n");
nfc_state_print(info);
break;
case SEC_NFC_SET_MODE:
if (info->mode == new)
break;
if (new >= SEC_NFC_MODE_COUNT) {
NFC_LOG_ERR("wrong mode (%d)\n", new);
ret = -EFAULT;
break;
}
sec_nfc_set_mode(info, new);
break;
case SEC_NFC_SLEEP:
if (info->mode != SEC_NFC_MODE_BOOTLOADER) {
if (wake_lock_active(&info->nfc_wake_lock))
wake_unlock(&info->nfc_wake_lock);
#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_cansleep(pdata->wake, SEC_NFC_WAKE_SLEEP);
#endif
}
break;
case SEC_NFC_WAKEUP:
if (info->mode != SEC_NFC_MODE_BOOTLOADER) {
gpio_set_value_cansleep(pdata->wake, SEC_NFC_WAKE_UP);
#ifdef CONFIG_SEC_ESE_COLDRESET
mutex_lock(&sleep_wake_mutex);
sleep_wakeup_state[IDX_SLEEP_WAKEUP_NFC] = true;
mutex_unlock(&sleep_wake_mutex);
#endif
if (!wake_lock_active(&info->nfc_wake_lock))
wake_lock(&info->nfc_wake_lock);
}
break;
/*[START] NPT*/
case SEC_NFC_SET_NPT_MODE:
NFC_LOG_INFO("NPT: VEN=%d, FIRM:%d\n", gpio_get_value(pdata->ven),
gpio_get_value_cansleep(pdata->firm));
if (new == SEC_NFC_NPT_CMD_ON) {
NFC_LOG_INFO("NPT: NFC OFF mode NPT - Turn on VEN.\n");
info->mode = SEC_NFC_MODE_FIRMWARE;
mutex_lock(&info->i2c_info.read_mutex);
info->i2c_info.read_irq = SEC_NFC_SKIP;
mutex_unlock(&info->i2c_info.read_mutex);
gpio_set_value(pdata->ven, SEC_NFC_PW_ON);
sec_nfc_clk_ctl_enable(info);
msleep(20);
gpio_set_value_cansleep(pdata->firm, SEC_NFC_FW_ON);
enable_irq_wake(info->i2c_info.i2c_dev->irq);
} else if (new == SEC_NFC_NPT_CMD_OFF) {
NFC_LOG_INFO("NPT: NFC OFF mode NPT - Turn off VEN.\n");
info->mode = SEC_NFC_MODE_OFF;
gpio_set_value_cansleep(pdata->firm, SEC_NFC_FW_OFF);
gpio_set_value(pdata->ven, SEC_NFC_PW_OFF);
sec_nfc_clk_ctl_disable(info);
disable_irq_wake(info->i2c_info.i2c_dev->irq);
}
break;
/*[END] NPT*/
#ifdef CONFIG_ESE_COLDRESET
case SEC_NFC_COLD_RESET:
trig_cold_reset_id(DEVICEHOST_ID);
break;
#endif
default:
NFC_LOG_ERR("NPT: Unknown ioctl 0x%x\n", cmd);
ret = -ENOIOCTLCMD;
break;
}
#ifdef CONFIG_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);
int ret = 0;
NFC_LOG_INFO("%s\n", __func__);
#if defined(CONFIG_ESE_SECURE) && defined(CONFIG_ESE_USE_TZ_API)
if (nfc_ese_secured == NOT_CHECKED) {
ret = tz_tee_ese_secure_check();
if (ret) {
nfc_ese_secured = ESE_NOT_SECURED;
NFC_LOG_ERR("eSE spi is not Secured\n");
return -EBUSY;
}
nfc_ese_secured = ESE_SECURED;
} else if (nfc_ese_secured == ESE_NOT_SECURED) {
NFC_LOG_ERR("eSE spi is not Secured\n");
return -EBUSY;
}
#endif
mutex_lock(&info->mutex);
if (info->mode != SEC_NFC_MODE_OFF) {
NFC_LOG_ERR("open() nfc is busy\n");
nfc_state_print(info);
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);
if (wake_lock_active(&info->nfc_clk_wake_lock))
wake_unlock(&info->nfc_clk_wake_lock);
nfc_state_print(info);
NFC_LOG_INFO("%s\n", __func__);
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;
NFC_LOG_INFO_WITH_DATE("suspend!\n");
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)
{
NFC_LOG_INFO_WITH_DATE("resume!\n");
return 0;
}
static SIMPLE_DEV_PM_OPS(sec_nfc_pm_ops, sec_nfc_suspend, sec_nfc_resume);
#endif
/*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;
static int retry_count = 3;
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;
pdata->irq = of_get_named_gpio(np, "sec-nfc,irq-gpio", 0);
#ifdef CONFIG_ESE_COLDRESET
pdata->coldreset = of_get_named_gpio(np, "sec-nfc,coldreset-gpio", 0);
NFC_LOG_INFO("parse_dt() coldreset : %d\n", pdata->coldreset);
cold_reset_gpio_data.firm_gpio = pdata->firm;
cold_reset_gpio_data.coldreset_gpio = pdata->coldreset;
#endif
if (of_get_property(dev->of_node, "sec-nfc,ldo_control", NULL)) {
pdata->nfc_pvdd = regulator_get(dev, "nfc_pvdd");
if (IS_ERR(pdata->nfc_pvdd)) {
NFC_LOG_ERR("get nfc_pvdd error\n");
pdata->nfc_pvdd = NULL;
if (--retry_count > 0)
return -EPROBE_DEFER;
else
return -ENODEV;
}
} else {
pdata->pvdd = of_get_named_gpio(np, "sec-nfc,pvdd-gpio", 0);
NFC_LOG_INFO("parse_dt() pvdd : %d\n", pdata->pvdd);
}
if (of_find_property(dev->of_node, "sec-nfc,sw-gpio", NULL)) {
pdata->i2c_switch = of_get_named_gpio(np, "sec-nfc,sw-gpio", 0);
NFC_LOG_INFO("parse_dt() i2c switch : %d\n", pdata->i2c_switch);
}
pdata->clk_req = of_get_named_gpio(np, "sec-nfc,clk_req-gpio", 0);
NFC_LOG_INFO("parse_dt() clk_req : %d\n", pdata->clk_req);
pdata->clk_req_wake = of_property_read_bool(np, "sec-nfc,clk_req_wake");
NFC_LOG_INFO("%s : sec-nfc,clk_req_wake: %s\n", __func__, pdata->clk_req_wake ? "true" : "false");
if (of_find_property(np, "clocks", NULL)) {
pdata->clk = clk_get(dev, "oscclk_nfc");
if (IS_ERR(pdata->clk)) {
NFC_LOG_ERR("probe() clk not found\n");
pdata->clk = NULL;
} else {
NFC_LOG_INFO("parse_dt() found oscclk_nfc\n");
}
}
if (of_property_read_bool(np, "sec-nfc,irq_all_trigger")) {
pdata->irq_all_trigger = true;
NFC_LOG_INFO("irq_all_trigger\n");
}
if (!of_property_read_u32(np, "sec-nfc,bootloader_ver", &pdata->bootloader_ver))
NFC_LOG_INFO("bootloader_ver : %d\n", pdata->bootloader_ver);
NFC_LOG_INFO("parse_dt() irq : %d, ven : %d, firm : %d\n",
pdata->irq, pdata->ven, pdata->firm);
return 0;
}
#ifdef FEATURE_SEC_NFC_TEST
static int sec_nfc_i2c_read(char *buf, int count)
{
struct sec_nfc_info *info = g_nfc_info;
int ret = 0;
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
NFC_LOG_ERR("NFC_TEST: sec_nfc is not enabled\n");
ret = -ENODEV;
goto out;
}
/* i2c recv */
if (count > info->i2c_info.buflen)
count = info->i2c_info.buflen;
if (count > SEC_NFC_MSG_MAX_SIZE) {
NFC_LOG_ERR("NFC_TEST: user required wrong size :%d\n", (u32)count);
ret = -EINVAL;
goto out;
}
mutex_lock(&info->i2c_info.read_mutex);
memset(buf, 0, count);
ret = i2c_master_recv(info->i2c_info.i2c_dev, buf, (u32)count);
NFC_LOG_INFO("NFC_TEST: recv size : %d\n", ret);
if (ret == -EREMOTEIO) {
ret = -ERESTART;
goto read_error;
} else if (ret != count) {
NFC_LOG_ERR("NFC_TEST: read failed: return: %d count: %d\n",
ret, (u32)count);
goto read_error;
}
mutex_unlock(&info->i2c_info.read_mutex);
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 int sec_nfc_i2c_write(char *buf, int count)
{
struct sec_nfc_info *info = g_nfc_info;
int ret = 0;
mutex_lock(&info->mutex);
if (info->mode == SEC_NFC_MODE_OFF) {
NFC_LOG_ERR("NFC_TEST: 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) {
NFC_LOG_ERR("NFC_TEST: user required wrong size :%d\n", (u32)count);
ret = -EINVAL;
goto out;
}
mutex_lock(&info->i2c_info.read_mutex);
ret = i2c_master_send(info->i2c_info.i2c_dev, buf, count);
mutex_unlock(&info->i2c_info.read_mutex);
if (ret == -EREMOTEIO) {
NFC_LOG_ERR("NFC_TEST: send failed: return: %d count: %d\n",
ret, (u32)count);
ret = -ERESTART;
goto out;
}
if (ret != count) {
NFC_LOG_ERR("NFC_TEST: send failed: return: %d count: %d\n",
ret, (u32)count);
ret = -EREMOTEIO;
}
out:
mutex_unlock(&info->mutex);
return ret;
}
static ssize_t test_show(struct class *class,
struct class_attribute *attr,
char *buf)
{
enum sec_nfc_mode old_mode = g_nfc_info->mode;
int size;
int ret = 0;
int timeout = 1;
on_nfc_test = true;
nfc_int_wait = false;
NFC_LOG_INFO("NFC_TEST: mode = %d, bootloader ver = %d\n", old_mode, g_nfc_info->pdata->bootloader_ver);
sec_nfc_set_mode(g_nfc_info, SEC_NFC_MODE_BOOTLOADER);
if (g_nfc_info->pdata->bootloader_ver > 4) { /* SEN4, SN4V, RN4V */
char cmd[9] = {0x0, 0x1, 0x5, 0x0, 0x0, 0x14, 0x1, 0x0, 0x0};
ret = sec_nfc_i2c_write(cmd, 9);
} else {
char cmd[4] = {0x0, 0x1, 0x0, 0x0};
ret = sec_nfc_i2c_write(cmd, 4);
}
if (ret < 0) {
NFC_LOG_INFO("NFC_TEST: i2c write error %d\n", ret);
size = snprintf(buf, PAGE_SIZE, "NFC_TEST: i2c write error %d\n", ret);
goto exit;
}
timeout = wait_event_interruptible_timeout(g_nfc_info->i2c_info.read_wait, nfc_int_wait, 100);
ret = sec_nfc_i2c_read(buf, 16);
if (ret < 0) {
NFC_LOG_INFO("NFC_TEST: i2c read error %d\n", ret);
size = snprintf(buf, PAGE_SIZE, "NFC_TEST: i2c read error %d\n", ret);
goto exit;
}
NFC_LOG_INFO("NFC_TEST: BL ver: %02X %02X %02X %02X, INT: %s\n", buf[0],
buf[1], buf[2], buf[3], timeout ? "OK":"NOK");
size = snprintf(buf, PAGE_SIZE, "BL ver: %02X.%02X.%02X.%02X, INT: %s\n", buf[0],
buf[1], buf[2], buf[3], timeout ? "OK":"NOK");
exit:
sec_nfc_set_mode(g_nfc_info, old_mode);
on_nfc_test = false;
return size;
}
static CLASS_ATTR_RO(test);
#endif
#if defined(CONFIG_NFC_PVDD_LATE_ENABLE)
static ssize_t pvdd_store(struct class *class,
struct class_attribute *attr, const char *buf, size_t size)
{
int ret = 0;
if (!g_nfc_info) {
NFC_LOG_ERR("%s nfc drv is NULL!", __func__);
return size;
}
NFC_LOG_INFO("late_pvdd_en %c\n", buf[0]);
if (buf[0] == '1') {
ret = sec_nfc_regulator_onoff(g_nfc_info->pdata, NFC_I2C_LDO_ON);
if (ret < 0)
NFC_LOG_ERR("regulator on failed: %d\n", ret);
if (of_find_property(g_nfc_info->dev->of_node, "sec-nfc,sw-gpio", NULL)) {
if (gpio_is_valid(g_nfc_info->pdata->i2c_switch)) {
ret = gpio_request(g_nfc_info->pdata->i2c_switch, "nfc_i2c_sw");
if (ret)
NFC_LOG_ERR("probe() i2c_swich gpio request failed\n");
gpio_direction_output(g_nfc_info->pdata->i2c_switch, 1);
}
}
}
return size;
}
static CLASS_ATTR_WO(pvdd);
#endif
static ssize_t nfc_support_show(struct class *class,
struct class_attribute *attr, char *buf)
{
NFC_LOG_INFO("\n");
return 0;
}
static CLASS_ATTR_RO(nfc_support);
static int __sec_nfc_probe(struct device *dev)
{
struct sec_nfc_info *info;
struct sec_nfc_platform_data *pdata = NULL;
int ret = 0;
struct class *nfc_class;
NFC_LOG_INFO("probe start\n");
if (dev->of_node) {
pdata = devm_kzalloc(dev,
sizeof(struct sec_nfc_platform_data), GFP_KERNEL);
if (!pdata) {
NFC_LOG_ERR("probe() Failed to allocate memory\n");
return -ENOMEM;
}
ret = sec_nfc_parse_dt(dev, pdata);
if (ret)
return ret;
} else {
pdata = dev->platform_data;
}
if (!pdata) {
NFC_LOG_ERR("probe() No platform data\n");
ret = -ENOMEM;
goto err_pdata;
}
info = kzalloc(sizeof(struct sec_nfc_info), GFP_KERNEL);
if (!info) {
NFC_LOG_ERR("probe() failed to allocate memory for sec_nfc_info\n");
ret = -ENOMEM;
goto err_info_alloc;
}
info->dev = dev;
info->pdata = pdata;
info->mode = SEC_NFC_MODE_OFF;
mutex_init(&info->mutex);
wake_lock_init(&info->nfc_wake_lock, WAKE_LOCK_SUSPEND, "nfc_wake_lock");
wake_lock_init(&info->nfc_clk_wake_lock, WAKE_LOCK_SUSPEND, "nfc_clk_wake_lock");
dev_set_drvdata(dev, info);
/*separate NFC / non NFC using GPIO*/
if (of_find_property(dev->of_node, "sec-nfc,check_nfc", NULL)) {
int nfc_support = 0;
nfc_support = gpio_get_value(of_get_named_gpio(dev->of_node, "sec-nfc,check_nfc", 0));
if (nfc_support > 0) {
NFC_LOG_INFO("nfc support: %d\n", nfc_support);
} else {
struct pinctrl *pinctrl = NULL;
pinctrl = devm_pinctrl_get_select(dev, "nfc_nc");
if (IS_ERR_OR_NULL(pinctrl))
NFC_LOG_ERR("Failed to configure nfc NC pin\n");
else
devm_pinctrl_put(pinctrl);
NFC_LOG_INFO("nfc not support: %d\n", nfc_support);
return -ENXIO;
}
}
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) {
NFC_LOG_ERR("probe() failed to register Device\n");
goto err_dev_reg;
}
if (pdata->clk_req_wake || pdata->irq_all_trigger) {
unsigned long irq_flag = IRQF_TRIGGER_RISING | IRQF_ONESHOT;
if (pdata->irq_all_trigger)
irq_flag |= IRQF_TRIGGER_FALLING;
ret = gpio_request(pdata->clk_req, "nfc_clk_req");
if (ret)
NFC_LOG_ERR("probe() failed to get clk_req\n");
gpio_direction_input(pdata->clk_req);
pdata->clk_irq = gpio_to_irq(pdata->clk_req);
ret = request_threaded_irq(pdata->clk_irq, NULL, sec_nfc_clk_irq_thread,
irq_flag, "sec-nfc_clk", info);
if (ret < 0)
NFC_LOG_ERR("probe() failed to register CLK REQ IRQ handler\n");
else
enable_irq_wake(pdata->clk_irq);
}
ret = gpio_request(pdata->ven, "nfc_ven");
if (ret) {
NFC_LOG_ERR("probe() failed to get gpio ven\n");
goto err_gpio_ven;
}
gpio_direction_output(pdata->ven, SEC_NFC_PW_OFF);
if (pdata->firm) {
ret = gpio_request(pdata->firm, "nfc_firm");
if (ret) {
NFC_LOG_ERR("probe() failed to get gpio firm\n");
goto err_gpio_firm;
}
gpio_direction_output(pdata->firm, SEC_NFC_FW_OFF);
}
#ifdef CONFIG_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
g_nfc_info = info;
#ifdef FEATURE_SEC_NFC_TEST
nfc_class = class_create(THIS_MODULE, "nfc_test");
if (IS_ERR(&nfc_class))
NFC_LOG_ERR("NFC: failed to create nfc_test class\n");
else {
ret = class_create_file(nfc_class, &class_attr_test);
if (ret)
NFC_LOG_ERR("NFC: failed to create attr_test\n");
}
#endif
nfc_class = class_create(THIS_MODULE, "nfc_sec");
if (IS_ERR(&nfc_class))
NFC_LOG_ERR("NFC: failed to create nfc class\n");
else {
ret = class_create_file(nfc_class, &class_attr_nfc_support);
if (ret)
NFC_LOG_ERR("NFC: failed to create attr_nfc_support\n");
#if defined(CONFIG_NFC_PVDD_LATE_ENABLE)
if (nfc_param_lpcharge == LPM_NO_SUPPORT) {
ret = class_create_file(nfc_class, &class_attr_pvdd);
if (ret)
NFC_LOG_ERR("NFC: failed to create attr_pvdd\n");
}
#endif
}
nfc_logger_register_nfc_stauts_func(sec_nfc_print_status);
NFC_LOG_INFO("probe() success\n");
return 0;
#ifdef CONFIG_ESE_COLDRESET
err_gpio_coldreset:
gpio_free(pdata->coldreset);
#endif
err_gpio_firm:
gpio_free(pdata->ven);
err_gpio_ven:
free_irq(pdata->clk_irq, info);
misc_deregister(&info->miscdev);
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;
NFC_LOG_DBG("remove\n");
misc_deregister(&info->miscdev);
sec_nfc_set_mode(info, SEC_NFC_MODE_OFF);
free_irq(client->irq, info);
free_irq(pdata->clk_irq, info);
gpio_free(pdata->irq);
gpio_set_value_cansleep(pdata->firm, 0);
gpio_free(pdata->ven);
if (pdata->firm)
gpio_free(pdata->firm);
wake_lock_destroy(&info->nfc_wake_lock);
kfree(info);
return 0;
}
#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;
nfc_logger_init();
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)
{
return __sec_nfc_remove(&client->dev);
}
static struct i2c_device_id sec_nfc_id_table[] = {
{ SEC_NFC_DRIVER_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sec_nfc_id_table);
static const struct of_device_id nfc_match_table[] = {
{ .compatible = SEC_NFC_DRIVER_NAME,},
{},
};
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,
.suppress_bind_attrs = true,
},
};
#if !IS_MODULE(CONFIG_SAMSUNG_NFC)
/*
* if cmd line(nfc_sec.nfc_param_lpcharge) is not defined in bootloader,
* this function is not called and LPM_NO_SUPPORT(-1) is assigned to nfc_param_lpcharge.
*/
static int __init nfc_lpcharge_func(char *str)
{
pr_info("nfc_sec.nfc_param_lpcharge %s\n", str);
if (str[0] == '1')
nfc_param_lpcharge = LPM_TRUE;
else
nfc_param_lpcharge = LPM_FALSE;
return 0;
}
early_param("nfc_sec.nfc_param_lpcharge", nfc_lpcharge_func);
#endif
#if IS_MODULE(CONFIG_SAMSUNG_NFC)
extern int spip3_dev_init(void);
extern void spip3_dev_exit(void);
static int __init sec_nfc_init(void)
{
#if IS_ENABLED(CONFIG_ESE_P3_LSI)
spip3_dev_init();
#endif
return SEC_NFC_INIT(&sec_nfc_driver);
}
static void __exit sec_nfc_exit(void)
{
#if IS_ENABLED(CONFIG_ESE_P3_LSI)
spip3_dev_exit();
#endif
SEC_NFC_EXIT(&sec_nfc_driver);
}
#else
static int __init sec_nfc_init(void)
{
pr_info("%s lpcharge %d\n", __func__, nfc_param_lpcharge);
if (nfc_param_lpcharge == LPM_TRUE)
return 0;
return SEC_NFC_INIT(&sec_nfc_driver);
}
static void __exit sec_nfc_exit(void)
{
if (nfc_param_lpcharge != LPM_TRUE)
SEC_NFC_EXIT(&sec_nfc_driver);
}
#endif
module_init(sec_nfc_init);
module_exit(sec_nfc_exit);
MODULE_DESCRIPTION("Samsung sec_nfc driver");
MODULE_LICENSE("GPL");
Reference in a new issue Copy permalink