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android_kernel_samsung_msm8226/drivers/misc/sec_nfc.c

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/*
* SAMSUNG NFC Controller
*
* Copyright (C) 2013 Samsung Electronics Co.Ltd
* Author: Woonki Lee <woonki84.lee@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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Last update: 2014-01-20
*
*/
#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/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/nfc/sec_nfc.h>
#include <linux/wakelock.h>
#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#ifdef CONFIG_SEC_NFC_CLK_REQ
#include <linux/interrupt.h>
#include <linux/clk.h>
#endif
#if defined(CONFIG_NFC_N5_PMC8974_CLK_REQ) || defined(CONFIG_SEC_NFC_USE_8226_BBCLK2)
#include <linux/clk.h>
#endif
#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>
#define SEC_NFC_GET_INFO(dev) i2c_get_clientdata(to_i2c_client(dev))
enum sec_nfc_irq {
SEC_NFC_NONE,
SEC_NFC_INT,
SEC_NFC_SKIP,
};
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_CLK_REQ
bool clk_ctl;
bool clk_state;
#endif
struct wake_lock wake_lock;
struct regulator *L22;
struct regulator *L6;
};
#ifndef CONFIG_SEC_NFC_NO_POWER_CONTROL
int nfc_power_onoff(struct sec_nfc_info *info, bool onoff);
#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 during power switching */
if (info->i2c_info.read_irq == SEC_NFC_SKIP) {
mutex_unlock(&info->i2c_info.read_mutex);
return IRQ_HANDLED;
}
info->i2c_info.read_irq = SEC_NFC_INT;
mutex_unlock(&info->i2c_info.read_mutex);
wake_up_interruptible(&info->i2c_info.read_wait);
if(!wake_lock_active(&info->wake_lock))
{
dev_dbg(info->dev, "%s: Set wake_lock_timeout for 2 sec. !!!\n", __func__);
wake_lock_timeout(&info->wake_lock, 2 * HZ);
}
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);
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", 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, 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, count);
//ret = -EREMOTEIO;
goto read_error;
}
info->i2c_info.read_irq = SEC_NFC_NONE;
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 %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;
}
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", 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, count);
ret = -ERESTART;
goto out;
}
if (ret != count) {
dev_err(info->dev, "send failed: return: %d count: %d\n",
ret, 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_INT)
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 occured 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_err("\n %s start", __func__);
pr_err("info : %p", info);
pr_err("pdata : %p", pdata);
pr_err("pdata->irq: %d", pdata->irq);
pr_err("client->irq:%d", client->irq);
//pdata->irq = client->irq;
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);
#ifndef CONFIG_SEC_NFC_NO_POWER_CONTROL
#if !defined(CONFIG_MACH_KSPORTSLTE_SPR)&& !defined(CONFIG_MACH_SLTE_SPR)
nfc_power_onoff(info,1);
#endif
#endif
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) {
dev_err(dev, "failed to register IRQ handler\n");
kfree(info->i2c_info.buf);
return ret;
}
pr_err("\n %s success", __func__);
return 0;
}
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_CLK_REQ
#ifdef CONFIG_SEC_NFC_USE_8226_RFCLK2
/* PMIC */
#define sec_nfc_clk_on(clk) clk_prepare_enable(clk)
#define sec_nfc_clk_off(clk) clk_disable_unprepare(clk)
#else
/* default GPIO */
#define sec_nfc_clk_on(clk) gpio_set_value(clk, 1)
#define sec_nfc_clk_off(clk) gpio_set_value(clk, 0)
#endif
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;
value = gpio_get_value(pdata->clk_req) > 0 ? false : true;
if (value == info->clk_state)
return IRQ_HANDLED;
//pr_err("\n %s: %s", __func__, value ? "True" : "False");
if (value)
sec_nfc_clk_on(pdata->clk_enable);
else
sec_nfc_clk_off(pdata->clk_enable);
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 = gpio_to_irq(pdata->clk_req);
int ret;
pr_err("\n %s start", __func__);
if (info->clk_ctl)
return;
ret = gpio_request(pdata->clk_req, "nfc-ex-clk");
if (ret) {
dev_err(info->dev, "failed to get gpio ven\n");
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 = gpio_to_irq(pdata->clk_req);
pr_err("\n %s start", __func__);
if (!info->clk_ctl)
return;
free_irq(irq, info);
gpio_free(pdata->clk_req);
if (info->clk_state)
sec_nfc_clk_off(pdata->clk_enable);
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_CLK_REQ */
static void sec_nfc_set_mode(struct sec_nfc_info *info,
enum sec_nfc_mode mode)
{
struct sec_nfc_platform_data *pdata = info->pdata;
/* intfo lock is aleady gotten before calling this function */
if (info->mode == mode) {
dev_dbg(info->dev, "Power mode is already %d", mode);
return;
}
pr_err("\n %s start %d", __func__, mode);
/* intfo lock is aleady getten before calling this function */
info->mode = mode;
#ifdef CONFIG_SEC_NFC_IF_I2C
/* Skip during power switching */
mutex_lock(&info->i2c_info.read_mutex);
info->i2c_info.read_irq = SEC_NFC_SKIP;
mutex_unlock(&info->i2c_info.read_mutex);
#endif
gpio_set_value_cansleep(pdata->ven, 0);
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_cansleep(pdata->ven, 1);
gpio_set_value(pdata->ven, SEC_NFC_PW_ON);
sec_nfc_clk_ctl_enable(info);
#ifdef CONFIG_SEC_NFC_IF_I2C
enable_irq_wake(info->i2c_info.i2c_dev->irq);
#endif
msleep(SEC_NFC_VEN_WAIT_TIME/2);
} else {
sec_nfc_clk_ctl_disable(info);
#ifdef CONFIG_SEC_NFC_IF_I2C
disable_irq_wake(info->i2c_info.i2c_dev->irq);
#endif
}
dev_dbg(info->dev, "Power mode is : %d\n", mode);
}
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);
#ifdef CONFIG_SEC_NFC_PRODUCT_N5
struct sec_nfc_platform_data *pdata = info->pdata;
#endif
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);
switch (cmd) {
case SEC_NFC_SET_MODE:
dev_dbg(info->dev, "%s: SEC_NFC_SET_MODE\n", __func__);
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;
#ifdef CONFIG_SEC_NFC_PRODUCT_N3
case SEC_NFC_SLEEP:
case SEC_NFC_WAKEUP:
break;
#elif defined(CONFIG_SEC_NFC_PRODUCT_N5)
case SEC_NFC_SLEEP:
if (info->mode != SEC_NFC_MODE_BOOTLOADER) {
if(wake_lock_active(&info->wake_lock))
wake_unlock(&info->wake_lock);
gpio_set_value(pdata->wake, SEC_NFC_WAKE_SLEEP);
}
break;
case SEC_NFC_WAKEUP:
if (info->mode != SEC_NFC_MODE_BOOTLOADER) {
gpio_set_value(pdata->wake, SEC_NFC_WAKE_UP);
if(!wake_lock_active(&info->wake_lock))
wake_lock(&info->wake_lock);
}
break;
#endif
default:
dev_err(info->dev, "Unknow ioctl 0x%x\n", cmd);
ret = -ENOIOCTLCMD;
break;
}
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;
pr_err("\n %s start", __func__);
dev_dbg(info->dev, "%s: info : %p" , __func__, info);
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_err("\n %s start", __func__);
dev_dbg(info->dev, "%s: info : %p" , __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,
};
#ifndef CONFIG_SEC_NFC_NO_POWER_CONTROL
int nfc_power_onoff(struct sec_nfc_info *data, bool onoff)
{
int ret = -1;
if (!data->L22) {
data->L22 = devm_regulator_get(data->dev, "nfc_ldo");
if (!data->L22) {
pr_err("%s: regulator pointer null 8941_L22, rc=%d\n",
__func__, ret);
return ret;
}
ret = regulator_set_voltage(data->L22, 3000000, 3000000);
if (ret) {
pr_err("%s: set voltage failed on 8941_L22, rc=%d\n",
__func__, ret);
return ret;
}
}
if (!data->L6) {
data->L6 = devm_regulator_get(data->dev, "vdd_nfc");
if (!data->L6) {
pr_err("%s: regulator pointer null 8941_l6, rc=%d\n",
__func__, ret);
return ret;
}
/*
ret = regulator_set_voltage(data->L6, 1800000, 1800000);
if (ret) {
pr_err("%s: set voltage failed on 8941_l6, rc=%d\n",
__func__, ret);
return ret;
}
*/
}
if(onoff){
#if !defined(CONFIG_MACH_ATLANTICLTE_VZW) && !defined(CONFIG_MACH_ATLANTICLTE_ATT) && !defined(CONFIG_MACH_ATLANTICLTE_USC)
ret = regulator_enable(data->L22);
regulator_set_mode(data->L22, REGULATOR_MODE_NORMAL);
if (ret) {
pr_err("%s: Failed to enable regulator L22.\n",
__func__);
return ret;
}
#endif
ret = regulator_enable(data->L6);
if (ret) {
pr_err("%s: Failed to enable regulator L6.\n",
__func__);
return ret;
}
}
else {
#if !defined(CONFIG_MACH_ATLANTICLTE_VZW) && !defined(CONFIG_MACH_ATLANTICLTE_ATT) && !defined(CONFIG_MACH_ATLANTICLTE_USC)
ret = regulator_disable(data->L22);
if (ret) {
pr_err("%s: Failed to disable regulatorL22.\n",
__func__);
return ret;
}
#endif
ret = regulator_disable(data->L6);
if (ret) {
pr_err("%s: Failed to disable regulator L6.\n",
__func__);
return ret;
}
}
return 0;
}
#endif
#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);
#ifndef CONFIG_SEC_NFC_NO_POWER_CONTROL
#if !defined(CONFIG_MACH_KSPORTSLTE_SPR)&& !defined(CONFIG_MACH_SLTE_SPR)
nfc_power_onoff(info,0);
#endif
#endif
return ret;
}
static int sec_nfc_resume(struct device *dev)
{
#ifndef CONFIG_SEC_NFC_NO_POWER_CONTROL
#if !defined(CONFIG_MACH_KSPORTSLTE_SPR)&& !defined(CONFIG_MACH_SLTE_SPR)
struct sec_nfc_info *info = SEC_NFC_GET_INFO(dev);
nfc_power_onoff(info,1);
#endif
#endif
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_flags(np, "sec-nfc,ven-gpio",
0, &pdata->ven_gpio_flags);
pdata->firm = of_get_named_gpio_flags(np, "sec-nfc,firm-gpio",
0, &pdata->firm_gpio_flags);
pdata->wake = pdata->firm;
pdata->irq = of_get_named_gpio_flags(np, "sec-nfc,irq-gpio",
0, &pdata->irq_gpio_flags);
#ifdef CONFIG_SEC_NFC_CLK_REQ
pdata->clk_req = of_get_named_gpio_flags(np, "sec-nfc,clk_req-gpio",
0, &pdata->irq_gpio_flags);
#ifdef CONFIG_SEC_NFC_USE_8226_RFCLK2
pdata->clk_enable = clk_get(dev, "nfc_clock");
#else
pdata->clk_enable = of_get_named_gpio_flags(np, "sec-nfc,ext_clk-gpio",
0, &pdata->irq_gpio_flags);
#endif
#endif
if (pdata->firm < 0)
of_property_read_u32(np, "sec-nfc,firm-expander-gpio", &pdata->firm);
pdata->wake = pdata->firm;
pr_info("%s: irq : %d, ven : %d, firm : %d\n",
__func__, pdata->irq, pdata->ven, pdata->firm);
return 0;
}
#else
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_err("\n %s start", __func__);
if (dev->of_node) {
pdata = devm_kzalloc(dev,
sizeof(struct sec_nfc_platform_data), GFP_KERNEL);
if (!pdata) {
dev_err(dev, "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) {
dev_err(dev, "No platform data\n");
ret = -ENOMEM;
goto err_pdata;
}
#ifdef CONFIG_SEC_NFC_USE_8226_BBCLK2
pdata->nfc_clk = clk_get(NULL, "nfc_clock");
if (IS_ERR(pdata->nfc_clk)) {
ret = PTR_ERR(pdata->nfc_clk);
printk(KERN_ERR "%s: Couldn't get D1 (%d)\n",
__func__, ret);
} else {
if (clk_prepare_enable(pdata->nfc_clk))
printk(KERN_ERR "%s: Couldn't prepare D1\n",
__func__);
}
#endif
#ifdef CONFIG_NFC_N5_PMC8974_CLK_REQ
pdata->nfc_clk = clk_get(NULL, "nfc_clk");
if (IS_ERR(pdata->nfc_clk)) {
ret = PTR_ERR(pdata->nfc_clk);
printk(KERN_ERR "%s: Couldn't get D1 (%d)\n",
__func__, ret);
} else {
if (clk_prepare_enable(pdata->nfc_clk))
printk(KERN_ERR "%s: Couldn't prepare D1\n",
__func__);
}
#endif
info = kzalloc(sizeof(struct sec_nfc_info), GFP_KERNEL);
if (!info) {
dev_err(dev, "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);
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;
}
ret = gpio_request(pdata->ven, "ven-gpio");
if (ret) {
dev_err(dev, "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, "firm-gpio");
if (ret) {
dev_err(dev, "failed to get gpio firm\n");
goto err_gpio_firm;
}
gpio_direction_output(pdata->firm, SEC_NFC_FW_OFF);
}
wake_lock_init(&info->wake_lock, WAKE_LOCK_SUSPEND, "NFCWAKE");
dev_dbg(dev, "%s: info: %p, pdata %p\n", __func__, info, pdata);
pr_err("\n %s success", __func__);
return 0;
err_gpio_firm:
gpio_free(pdata->ven);
err_gpio_ven:
err_dev_reg:
err_info_alloc:
kfree(info);
err_pdata:
return ret;
}
static int __sec_nfc_remove(struct device *dev)
{
struct sec_nfc_info *info = dev_get_drvdata(dev);
struct sec_nfc_platform_data *pdata = info->pdata;
dev_dbg(info->dev, "%s\n", __func__);
#if defined(CONFIG_NFC_N5_PMC8974_CLK_REQ) || defined(CONFIG_SEC_NFC_USE_8226_BBCLK2)
if (pdata->nfc_clk)
clk_unprepare(pdata->nfc_clk);
#endif
misc_deregister(&info->miscdev);
sec_nfc_set_mode(info, SEC_NFC_MODE_OFF);
gpio_set_value(pdata->firm, 0);
gpio_set_value_cansleep(pdata->ven, 0);
gpio_free(pdata->ven);
if (pdata->firm) gpio_free(pdata->firm);
wake_lock_destroy(&info->wake_lock);
kfree(info);
return 0;
}
#ifdef CONFIG_SEC_NFC_IF_I2C
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 __devinit 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 __devexit sec_nfc_remove(struct i2c_client *client)
{
sec_nfc_i2c_remove(&client->dev);
return __sec_nfc_remove(&client->dev);
}
static struct i2c_device_id sec_nfc_id_table[] = {
{ SEC_NFC_DRIVER_NAME, 0 },
{ }
};
#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 __devinit sec_nfc_probe(struct platform_device *pdev)
{
return __sec_nfc_probe(&pdev->dev);
}
static int __devexit 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 struct of_device_id nfc_match_table[] = {
{ .compatible = SEC_NFC_DRIVER_NAME,},
{},
};
#else
#define nfc_match_table NULL
#endif
static sec_nfc_driver_type 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_DESCRIPTION("Samsung sec_nfc driver");
MODULE_LICENSE("GPL");
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