680 lines
20 KiB
C
680 lines
20 KiB
C
/******************************************************************************
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* Copyright (C) 2015, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2021 NXP
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* *
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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******************************************************************************/
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#include <linux/of_gpio.h>
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#include <linux/of_device.h>
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#include <linux/delay.h>
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#include <linux/version.h>
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#include "common.h"
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#include "common_ese.h"
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#include "recovery_seq.h"
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int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
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uint8_t interface)
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{
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struct device_node *np = dev->of_node;
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struct platform_gpio *nfc_gpio = &nfc_configs->gpio;
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if (!np) {
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pr_err("nfc of_node NULL\n");
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return -EINVAL;
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}
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nfc_gpio->irq = -EINVAL;
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nfc_gpio->dwl_req = -EINVAL;
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nfc_gpio->ven = -EINVAL;
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//required for i2c based chips only
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if (interface == PLATFORM_IF_I2C) {
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nfc_gpio->irq = of_get_named_gpio(np, DTS_IRQ_GPIO_STR, 0);
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if ((!gpio_is_valid(nfc_gpio->irq))) {
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pr_err("nfc irq gpio invalid %d\n", nfc_gpio->irq);
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return -EINVAL;
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}
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pr_info("%s: irq %d\n", __func__, nfc_gpio->irq);
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}
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nfc_gpio->ven = of_get_named_gpio(np, DTS_VEN_GPIO_STR, 0);
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if ((!gpio_is_valid(nfc_gpio->ven))) {
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pr_err("nfc ven gpio invalid %d\n", nfc_gpio->ven);
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return -EINVAL;
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}
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nfc_gpio->dwl_req = of_get_named_gpio(np, DTS_FWDN_GPIO_STR, 0);
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if ((!gpio_is_valid(nfc_gpio->dwl_req)))
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pr_warn("nfc dwl_req gpio invalid %d\n", nfc_gpio->dwl_req);
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pr_info("%s: %d, %d, %d, %d\n", __func__, nfc_gpio->irq, nfc_gpio->ven,
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nfc_gpio->dwl_req);
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return 0;
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}
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void set_valid_gpio(int gpio, int value)
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{
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if (gpio_is_valid(gpio)) {
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pr_debug("%s gpio %d value %d\n", __func__, gpio, value);
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gpio_set_value(gpio, value);
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// hardware dependent delay
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usleep_range(NFC_GPIO_SET_WAIT_TIME_USEC,
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NFC_GPIO_SET_WAIT_TIME_USEC + 100);
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}
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}
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int get_valid_gpio(int gpio)
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{
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int value = -EINVAL;
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if (gpio_is_valid(gpio)) {
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value = gpio_get_value(gpio);
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pr_debug("%s gpio %d value %d\n", __func__, gpio, value);
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}
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return value;
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}
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void gpio_set_ven(struct nfc_dev *nfc_dev, int value)
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{
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struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
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if (gpio_get_value(nfc_gpio->ven) != value) {
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pr_debug("%s: value %d\n", __func__, value);
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/*reset on change in level from high to low */
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if (value)
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ese_cold_reset_release(nfc_dev);
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gpio_set_value(nfc_gpio->ven, value);
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// hardware dependent delay
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usleep_range(NFC_GPIO_SET_WAIT_TIME_USEC,
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NFC_GPIO_SET_WAIT_TIME_USEC + 100);
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}
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}
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int configure_gpio(unsigned int gpio, int flag)
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{
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int ret;
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pr_debug("%s: nfc gpio [%d] flag [%01x]\n", __func__, gpio, flag);
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if (gpio_is_valid(gpio)) {
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ret = gpio_request(gpio, "nfc_gpio");
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if (ret) {
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pr_err("%s: unable to request nfc gpio [%d]\n", __func__, gpio);
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return ret;
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}
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/*set direction and value for output pin */
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if (flag & GPIO_OUTPUT) {
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ret = gpio_direction_output(gpio, (GPIO_HIGH & flag));
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pr_debug("nfc o/p gpio %d level %d\n", gpio, gpio_get_value(gpio));
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} else {
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ret = gpio_direction_input(gpio);
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pr_debug("nfc i/p gpio %d\n", gpio);
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}
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if (ret) {
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pr_err("%s: unable to set direction for nfc gpio [%d]\n", __func__, gpio);
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gpio_free(gpio);
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return ret;
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}
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/*Consider value as control for input IRQ pin */
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if (flag & GPIO_IRQ) {
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ret = gpio_to_irq(gpio);
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if (ret < 0) {
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pr_err("%s: unable to set irq for nfc gpio [%d]\n", __func__, gpio);
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gpio_free(gpio);
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return ret;
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}
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pr_debug("%s: gpio_to_irq successful [%d]\n", __func__, gpio);
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return ret;
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}
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} else {
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pr_err("%s: invalid gpio\n", __func__);
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ret = -EINVAL;
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}
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return ret;
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}
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void gpio_free_all(struct nfc_dev *nfc_dev)
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{
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struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
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if (gpio_is_valid(nfc_gpio->dwl_req))
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gpio_free(nfc_gpio->dwl_req);
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if (gpio_is_valid(nfc_gpio->irq))
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gpio_free(nfc_gpio->irq);
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if (gpio_is_valid(nfc_gpio->ven))
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gpio_free(nfc_gpio->ven);
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}
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void nfc_misc_unregister(struct nfc_dev *nfc_dev, int count)
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{
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pr_debug("%s: entry\n", __func__);
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device_destroy(nfc_dev->nfc_class, nfc_dev->devno);
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cdev_del(&nfc_dev->c_dev);
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class_destroy(nfc_dev->nfc_class);
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unregister_chrdev_region(nfc_dev->devno, count);
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}
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int nfc_misc_register(struct nfc_dev *nfc_dev,
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const struct file_operations *nfc_fops,
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int count, char *devname, char *classname)
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{
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int ret = 0;
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ret = alloc_chrdev_region(&nfc_dev->devno, 0, count, devname);
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if (ret < 0) {
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pr_err("%s: failed to alloc chrdev region ret %d\n", __func__, ret);
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return ret;
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}
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nfc_dev->nfc_class = class_create(THIS_MODULE, classname);
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if (IS_ERR(nfc_dev->nfc_class)) {
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ret = PTR_ERR(nfc_dev->nfc_class);
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pr_err("%s: failed to register device class ret %d\n", __func__, ret);
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unregister_chrdev_region(nfc_dev->devno, count);
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return ret;
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}
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cdev_init(&nfc_dev->c_dev, nfc_fops);
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ret = cdev_add(&nfc_dev->c_dev, nfc_dev->devno, count);
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if (ret < 0) {
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pr_err("%s: failed to add cdev ret %d\n", __func__, ret);
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class_destroy(nfc_dev->nfc_class);
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unregister_chrdev_region(nfc_dev->devno, count);
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return ret;
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}
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nfc_dev->nfc_device = device_create(nfc_dev->nfc_class, NULL,
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nfc_dev->devno, nfc_dev, devname);
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if (IS_ERR(nfc_dev->nfc_device)) {
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ret = PTR_ERR(nfc_dev->nfc_device);
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pr_err("%s: failed to create the device ret %d\n", __func__, ret);
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cdev_del(&nfc_dev->c_dev);
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class_destroy(nfc_dev->nfc_class);
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unregister_chrdev_region(nfc_dev->devno, count);
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return ret;
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}
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return 0;
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}
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/*
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* nfc_ioctl_power_states() - power control
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* @nfc_dev: nfc device data structure
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* @arg: mode that we want to move to
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*
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* Device power control. Depending on the arg value, device moves to
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* different states, refer common.h for args
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*
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* Return: -ENOIOCTLCMD if arg is not supported, 0 in any other case
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*/
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static int nfc_ioctl_power_states(struct nfc_dev *nfc_dev, unsigned long arg)
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{
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int ret = 0;
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struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
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if (arg == NFC_POWER_OFF) {
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/*
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* We are attempting a hardware reset so let us disable
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* interrupts to avoid spurious notifications to upper
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* layers.
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*/
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nfc_dev->nfc_disable_intr(nfc_dev);
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set_valid_gpio(nfc_gpio->dwl_req, 0);
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gpio_set_ven(nfc_dev, 0);
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nfc_dev->nfc_ven_enabled = false;
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} else if (arg == NFC_POWER_ON) {
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nfc_dev->nfc_enable_intr(nfc_dev);
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set_valid_gpio(nfc_gpio->dwl_req, 0);
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gpio_set_ven(nfc_dev, 1);
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nfc_dev->nfc_ven_enabled = true;
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} else if (arg == NFC_FW_DWL_VEN_TOGGLE) {
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/*
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* We are switching to download Mode, toggle the enable pin
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* in order to set the NFCC in the new mode
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*/
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nfc_dev->nfc_disable_intr(nfc_dev);
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set_valid_gpio(nfc_gpio->dwl_req, 1);
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nfc_dev->nfc_state = NFC_STATE_FW_DWL;
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gpio_set_ven(nfc_dev, 0);
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gpio_set_ven(nfc_dev, 1);
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nfc_dev->nfc_enable_intr(nfc_dev);
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} else if (arg == NFC_FW_DWL_HIGH) {
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/*
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* Setting firmware download gpio to HIGH
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* before FW download start
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*/
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set_valid_gpio(nfc_gpio->dwl_req, 1);
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nfc_dev->nfc_state = NFC_STATE_FW_DWL;
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} else if (arg == NFC_VEN_FORCED_HARD_RESET) {
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nfc_dev->nfc_disable_intr(nfc_dev);
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gpio_set_ven(nfc_dev, 0);
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gpio_set_ven(nfc_dev, 1);
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nfc_dev->nfc_enable_intr(nfc_dev);
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} else if (arg == NFC_FW_DWL_LOW) {
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/*
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* Setting firmware download gpio to LOW
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* FW download finished
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*/
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set_valid_gpio(nfc_gpio->dwl_req, 0);
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nfc_dev->nfc_state = NFC_STATE_NCI;
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} else {
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pr_err("%s bad arg %lu\n", __func__, arg);
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ret = -ENOIOCTLCMD;
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}
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return ret;
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}
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/** @brief IOCTL function to be used to set or get data from upper layer.
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*
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* @param pfile fil node for opened device.
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* @cmd IOCTL type from upper layer.
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* @arg IOCTL arg from upper layer.
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*
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* @return 0 on success, error code for failures.
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*/
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long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
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{
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int ret = 0;
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struct nfc_dev *nfc_dev = pfile->private_data;
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if (!nfc_dev)
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return -ENODEV;
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pr_debug("%s cmd = %x arg = %zx\n", __func__, cmd, arg);
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switch (cmd) {
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case NFC_SET_PWR:
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ret = nfc_ioctl_power_states(nfc_dev, arg);
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break;
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case ESE_SET_PWR:
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ret = nfc_ese_pwr(nfc_dev, arg);
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break;
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case ESE_GET_PWR:
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ret = nfc_ese_pwr(nfc_dev, ESE_POWER_STATE);
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break;
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case NFC_GET_IRQ_STATE:
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ret = gpio_get_value(nfc_dev->configs.gpio.irq);
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break;
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default:
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pr_err("%s bad cmd %lu\n", __func__, arg);
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ret = -ENOIOCTLCMD;
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};
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return ret;
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}
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int nfc_dev_open(struct inode *inode, struct file *filp)
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{
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struct nfc_dev *nfc_dev = container_of(inode->i_cdev, struct nfc_dev, c_dev);
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pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode));
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mutex_lock(&nfc_dev->dev_ref_mutex);
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filp->private_data = nfc_dev;
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if (nfc_dev->dev_ref_count == 0) {
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set_valid_gpio(nfc_dev->configs.gpio.dwl_req, 0);
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nfc_dev->nfc_enable_intr(nfc_dev);
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}
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nfc_dev->dev_ref_count = nfc_dev->dev_ref_count + 1;
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mutex_unlock(&nfc_dev->dev_ref_mutex);
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return 0;
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}
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int nfc_dev_close(struct inode *inode, struct file *filp)
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{
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struct nfc_dev *nfc_dev = container_of(inode->i_cdev, struct nfc_dev, c_dev);
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pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode));
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mutex_lock(&nfc_dev->dev_ref_mutex);
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if (nfc_dev->dev_ref_count == 1) {
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nfc_dev->nfc_disable_intr(nfc_dev);
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set_valid_gpio(nfc_dev->configs.gpio.dwl_req, 0);
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}
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if (nfc_dev->dev_ref_count > 0)
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nfc_dev->dev_ref_count = nfc_dev->dev_ref_count - 1;
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else {
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nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS_NFC);
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/* Uncomment below line incase of eSE calls flow is via NFC driver
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* i.e. direct calls from SPI HAL to NFC driver
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*/
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//nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS);
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}
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filp->private_data = NULL;
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mutex_unlock(&nfc_dev->dev_ref_mutex);
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return 0;
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}
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/**
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* get_nfcc_chip_type_dl() - get chip type in fw download command;
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* @nfc_dev: nfc device data structure
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*
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* Perform get version command and determine chip
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* type from response.
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*
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* @Return: enum chip_types value
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*
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*/
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static enum chip_types get_nfcc_chip_type_dl(struct nfc_dev *nfc_dev)
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{
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int ret = 0;
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int cmd_length = 0;
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uint8_t *cmd = nfc_dev->write_kbuf;
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uint8_t *rsp = nfc_dev->read_kbuf;
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enum chip_types chip_type = CHIP_UNKNOWN;
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*cmd++ = 0x00;
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*cmd++ = 0x04;
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*cmd++ = 0xF1;
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*cmd++ = 0x00;
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*cmd++ = 0x00;
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*cmd++ = 0x00;
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*cmd++ = 0x6E;
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*cmd++ = 0xEF;
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cmd_length = cmd - nfc_dev->write_kbuf;
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pr_debug("%s:Sending GET_VERSION cmd of size=%d\n", __func__, cmd_length);
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ret = nfc_dev->nfc_write(nfc_dev, nfc_dev->write_kbuf, cmd_length, MAX_RETRY_COUNT);
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if (ret <= 0) {
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pr_err("%s: - nfc get version cmd error ret %d\n", __func__, ret);
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goto err;
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}
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memset(rsp, 0x00, DL_GET_VERSION_RSP_LEN_2);
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pr_debug("%s:Reading response of GET_VERSION cmd\n", __func__);
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ret = nfc_dev->nfc_read(nfc_dev, rsp, DL_GET_VERSION_RSP_LEN_2, NCI_CMD_RSP_TIMEOUT);
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if (ret <= 0) {
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pr_err("%s: - nfc get version rsp error ret %d\n", __func__, ret);
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goto err;
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}
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if (rsp[0] == FW_MSG_CMD_RSP && ret >= DL_GET_VERSION_RSP_LEN_2) {
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nfc_dev->fw_major_version = rsp[FW_MAJOR_VER_OFFSET];
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if (rsp[FW_ROM_CODE_VER_OFFSET] == SN1XX_ROM_VER &&
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rsp[FW_MAJOR_VER_OFFSET] == SN1xx_MAJOR_VER)
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chip_type = CHIP_SN1XX;
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else if (rsp[FW_ROM_CODE_VER_OFFSET] == SN220_ROM_VER &&
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rsp[FW_MAJOR_VER_OFFSET] == SN220_MAJOR_VER)
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chip_type = CHIP_SN220;
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pr_info("%s:NFC Chip Type 0x%02x Rom Version 0x%02x FW Minor 0x%02x Major 0x%02x\n",
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__func__, rsp[3], rsp[4], rsp[6], rsp[7]);
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}
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err:
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return chip_type;
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}
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/**
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* get_nfcc_session_state_dl() - gets the session state
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* @nfc_dev: nfc device data structure
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*
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* Performs get session command and determine
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* the nfcc state based on session status.
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*
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* @Return nfcc state based on session status.
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* NFC_STATE_FW_TEARED if sessionis not closed
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* NFC_STATE_FW_DWL if session closed
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* NFC_STATE_UNKNOWN in error cases.
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*/
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enum nfc_state_flags get_nfcc_session_state_dl(struct nfc_dev *nfc_dev)
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{
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int ret = 0;
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int cmd_length = 0;
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uint8_t *cmd = nfc_dev->write_kbuf;
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uint8_t *rsp = nfc_dev->read_kbuf;
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enum nfc_state_flags nfc_state = NFC_STATE_UNKNOWN;
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*cmd++ = 0x00;
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*cmd++ = 0x04;
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*cmd++ = 0xF2;
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*cmd++ = 0x00;
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*cmd++ = 0x00;
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*cmd++ = 0x00;
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*cmd++ = 0xF5;
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*cmd++ = 0x33;
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cmd_length = cmd - nfc_dev->write_kbuf;
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pr_debug("%s:Sending GET_SESSION_STATE cmd of size=%d\n", __func__, cmd_length);
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ret = nfc_dev->nfc_write(nfc_dev, nfc_dev->write_kbuf, cmd_length, MAX_RETRY_COUNT);
|
|
if (ret <= 0) {
|
|
pr_err("%s: - nfc get session cmd error ret %d\n", __func__, ret);
|
|
goto err;
|
|
}
|
|
memset(rsp, 0x00, DL_GET_SESSION_STATE_RSP_LEN);
|
|
pr_debug("%s:Reading response of GET_SESSION_STATE cmd\n", __func__);
|
|
ret = nfc_dev->nfc_read(nfc_dev, rsp, DL_GET_SESSION_STATE_RSP_LEN, NCI_CMD_RSP_TIMEOUT);
|
|
if (ret <= 0) {
|
|
pr_err("%s: - nfc get session rsp error ret %d\n", __func__, ret);
|
|
goto err;
|
|
}
|
|
if (rsp[0] != FW_MSG_CMD_RSP) {
|
|
pr_err("%s: - nfc invalid get session state rsp\n", __func__);
|
|
goto err;
|
|
}
|
|
pr_debug("Response bytes are %02x%02x%02x%02x%02x%02x%02x%02x",
|
|
rsp[0], rsp[1], rsp[2], rsp[3], rsp[4], rsp[5], rsp[6], rsp[7]);
|
|
/*verify fw in non-teared state */
|
|
if (rsp[GET_SESSION_STS_OFF] != NFCC_SESSION_STS_CLOSED) {
|
|
pr_err("%s NFCC booted in FW teared state\n", __func__);
|
|
nfc_state = NFC_STATE_FW_TEARED;
|
|
} else {
|
|
pr_info("%s NFCC booted in FW DN mode\n", __func__);
|
|
nfc_state = NFC_STATE_FW_DWL;
|
|
}
|
|
err:
|
|
return nfc_state;
|
|
}
|
|
|
|
/**
|
|
* get_nfcc_chip_type() - get nfcc chip type in nci mode.
|
|
* @nfc_dev: nfc device data structure.
|
|
*
|
|
* Function to perform nci core reset and extract
|
|
* chip type from the response.
|
|
*
|
|
* @Return: enum chip_types value
|
|
*
|
|
*/
|
|
static enum chip_types get_nfcc_chip_type(struct nfc_dev *nfc_dev)
|
|
{
|
|
int ret = 0;
|
|
int cmd_length = 0;
|
|
uint8_t major_version = 0;
|
|
uint8_t rom_version = 0;
|
|
uint8_t *cmd = nfc_dev->write_kbuf;
|
|
uint8_t *rsp = nfc_dev->read_kbuf;
|
|
enum chip_types chip_type = CHIP_UNKNOWN;
|
|
|
|
*cmd++ = 0x20;
|
|
*cmd++ = 0x00;
|
|
*cmd++ = 0x01;
|
|
*cmd++ = 0x00;
|
|
cmd_length = cmd - nfc_dev->write_kbuf;
|
|
|
|
pr_debug("%s:Sending NCI Core Reset cmd of size=%d\n", __func__, cmd_length);
|
|
ret = nfc_dev->nfc_write(nfc_dev, nfc_dev->write_kbuf, cmd_length, NO_RETRY);
|
|
if (ret <= 0) {
|
|
pr_err("%s: - nfc nci core reset cmd error ret %d\n", __func__, ret);
|
|
goto err;
|
|
}
|
|
usleep_range(NCI_RESET_RESP_READ_DELAY, NCI_RESET_RESP_READ_DELAY + 100);
|
|
nfc_dev->nfc_enable_intr(nfc_dev);
|
|
|
|
memset(rsp, 0x00, NCI_RESET_RSP_LEN);
|
|
pr_debug("%s:Reading NCI Core Reset rsp\n", __func__);
|
|
ret = nfc_dev->nfc_read(nfc_dev, rsp, NCI_RESET_RSP_LEN, NCI_CMD_RSP_TIMEOUT);
|
|
if (ret <= 0) {
|
|
pr_err("%s: - nfc nci core reset rsp error ret %d\n", __func__, ret);
|
|
goto err_disable_intr;
|
|
}
|
|
|
|
pr_debug(" %s: nci core reset response 0x%02x%02x%02x%02x\n",
|
|
__func__, rsp[0], rsp[1], rsp[2], rsp[3]);
|
|
if (rsp[0] != NCI_MSG_RSP) {
|
|
/* reset response failed response*/
|
|
pr_err("%s invalid nci core reset response", __func__);
|
|
goto err_disable_intr;
|
|
}
|
|
|
|
memset(rsp, 0x00, NCI_RESET_NTF_LEN);
|
|
/* read nci rest response ntf */
|
|
ret = nfc_dev->nfc_read(nfc_dev, rsp, NCI_RESET_NTF_LEN, NCI_CMD_RSP_TIMEOUT);
|
|
if (ret <= 0) {
|
|
pr_err("%s - nfc nci rest rsp ntf error status %d\n", __func__, ret);
|
|
goto err_disable_intr;
|
|
}
|
|
if (rsp[0] == NCI_MSG_NTF) {
|
|
/* read version info from NCI Reset Notification */
|
|
rom_version = rsp[NCI_HDR_LEN + rsp[NCI_PAYLOAD_LEN_IDX] - 3];
|
|
major_version = rsp[NCI_HDR_LEN + rsp[NCI_PAYLOAD_LEN_IDX] - 2];
|
|
/* determine chip type based on version info */
|
|
if (rom_version == SN1XX_ROM_VER && major_version == SN1xx_MAJOR_VER)
|
|
chip_type = CHIP_SN1XX;
|
|
else if (rom_version == SN220_ROM_VER && major_version == SN220_MAJOR_VER)
|
|
chip_type = CHIP_SN220;
|
|
pr_debug(" %s:NCI Core Reset ntf 0x%02x%02x%02x%02x\n",
|
|
__func__, rsp[0], rsp[1], rsp[2], rsp[3]);
|
|
}
|
|
err_disable_intr:
|
|
nfc_dev->nfc_disable_intr(nfc_dev);
|
|
err:
|
|
return chip_type;
|
|
}
|
|
|
|
/**
|
|
* validate_download_gpio() - validate download gpio.
|
|
* @nfc_dev: nfc_dev device data structure.
|
|
* @chip_type: chip type of the platform.
|
|
*
|
|
* Validates dwnld gpio should configured for supported and
|
|
* should not be configured for unsupported platform.
|
|
*
|
|
* @Return: true if gpio validation successful ortherwise
|
|
* false if validation fails.
|
|
*/
|
|
static bool validate_download_gpio(struct nfc_dev *nfc_dev, enum chip_types chip_type)
|
|
{
|
|
bool status = false;
|
|
struct platform_gpio *nfc_gpio;
|
|
|
|
if (nfc_dev == NULL) {
|
|
pr_err("%s nfc devices structure is null\n");
|
|
return status;
|
|
}
|
|
nfc_gpio = &nfc_dev->configs.gpio;
|
|
if (chip_type == CHIP_SN1XX) {
|
|
/* gpio should be configured for SN1xx */
|
|
status = gpio_is_valid(nfc_gpio->dwl_req);
|
|
} else if (chip_type == CHIP_SN220) {
|
|
/* gpio should not be configured for SN220 */
|
|
set_valid_gpio(nfc_gpio->dwl_req, 0);
|
|
gpio_free(nfc_gpio->dwl_req);
|
|
nfc_gpio->dwl_req = -EINVAL;
|
|
status = true;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/* Check for availability of NFC controller hardware */
|
|
int nfcc_hw_check(struct nfc_dev *nfc_dev)
|
|
{
|
|
int ret = 0;
|
|
enum nfc_state_flags nfc_state = NFC_STATE_UNKNOWN;
|
|
enum chip_types chip_type = CHIP_UNKNOWN;
|
|
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
|
|
|
|
/*get fw version in nci mode*/
|
|
gpio_set_ven(nfc_dev, 0);
|
|
gpio_set_ven(nfc_dev, 1);
|
|
chip_type = get_nfcc_chip_type(nfc_dev);
|
|
|
|
/*get fw version in fw dwl mode*/
|
|
if (chip_type == CHIP_UNKNOWN) {
|
|
nfc_dev->nfc_enable_intr(nfc_dev);
|
|
/*Chip is unknown, initially assume with fw dwl pin enabled*/
|
|
set_valid_gpio(nfc_gpio->dwl_req, 1);
|
|
gpio_set_ven(nfc_dev, 0);
|
|
gpio_set_ven(nfc_dev, 1);
|
|
chip_type = get_nfcc_chip_type_dl(nfc_dev);
|
|
/*get the state of nfcc normal/teared in fw dwl mode*/
|
|
} else {
|
|
nfc_state = NFC_STATE_NCI;
|
|
}
|
|
|
|
/*validate gpio config required as per the chip*/
|
|
if (!validate_download_gpio(nfc_dev, chip_type)) {
|
|
pr_info("%s gpio validation fail", __func__);
|
|
ret = -ENXIO;
|
|
goto err;
|
|
}
|
|
|
|
/*check whether the NFCC is in FW DN or Teared state*/
|
|
if (nfc_state != NFC_STATE_NCI)
|
|
nfc_state = get_nfcc_session_state_dl(nfc_dev);
|
|
|
|
/*nfcc state specific operations */
|
|
switch (nfc_state) {
|
|
case NFC_STATE_FW_TEARED:
|
|
pr_warn("%s: - NFCC FW Teared State\n", __func__);
|
|
#if IS_ENABLED(CONFIG_NXP_NFC_RECOVERY)
|
|
/* recovery neeeded only for SN1xx */
|
|
if (chip_type == CHIP_SN1XX) {
|
|
if (do_recovery(nfc_dev) == STATUS_FAILED)
|
|
pr_debug("%s: - nfcc recoverey failed\n", __func__);
|
|
else
|
|
pr_debug("%s: - nfcc recovered successfully\n", __func__);
|
|
nfc_state = get_nfcc_session_state_dl(nfc_dev);
|
|
}
|
|
#endif
|
|
/*fallthrough*/
|
|
case NFC_STATE_FW_DWL:
|
|
case NFC_STATE_NCI:
|
|
break;
|
|
case NFC_STATE_UNKNOWN:
|
|
default:
|
|
ret = -ENXIO;
|
|
pr_err("%s: - NFCC HW not available\n", __func__);
|
|
goto err;
|
|
};
|
|
nfc_dev->nfc_state = nfc_state;
|
|
nfc_dev->nfc_ven_enabled = true;
|
|
err:
|
|
nfc_dev->nfc_disable_intr(nfc_dev);
|
|
set_valid_gpio(nfc_gpio->dwl_req, 0);
|
|
gpio_set_ven(nfc_dev, 0);
|
|
gpio_set_ven(nfc_dev, 1);
|
|
return ret;
|
|
}
|
|
|
|
int validate_nfc_state_nci(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
|
|
|
|
if (!gpio_get_value(nfc_gpio->ven)) {
|
|
pr_err("VEN LOW - NFCC powered off\n");
|
|
return -ENODEV;
|
|
}
|
|
if (get_valid_gpio(nfc_gpio->dwl_req) == 1) {
|
|
pr_err("FW download in-progress\n");
|
|
return -EBUSY;
|
|
}
|
|
if (nfc_dev->nfc_state != NFC_STATE_NCI) {
|
|
pr_err("FW download state\n");
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|