samsung-sm8650/android_kernel_samsung_sm8650-modules
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Код Задачі Запити на злиття Дії Пакети Проєкти Релізи Вікі Активність

Updated corresponding to - NFC_AR_00_E000_12.04.01_OpnSrc

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Цей коміт міститься в:
nxf35421
2021-04-29 20:39:02 +05:30
джерело 0d82b80e37
коміт f64dad377c
7 змінених файлів з 404 додано та 684 видалено
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428
nfc/common.c
Переглянути файл

@@ -1,7 +1,7 @@
/******************************************************************************
* Copyright (C) 2015, The Linux Foundation. All rights reserved.
* Copyright (C) 2019-2021 NXP
* *
* Copyright (C) 2015, The Linux Foundation. All rights reserved.
* Copyright (C) 2019-2021 NXP
*
* 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
@@ -17,13 +17,11 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
******************************************************************************/
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/of_device.h>
#include <linux/delay.h>
#include <linux/version.h>
#include "common.h"
#include "common_ese.h"
#include "recovery_seq.h"
int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
uint8_t interface)
@@ -32,7 +30,7 @@ int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
struct platform_gpio *nfc_gpio = &nfc_configs->gpio;
if (!np) {
pr_err("nfc of_node NULL\n");
pr_err("%s: nfc of_node NULL\n", __func__);
return -EINVAL;
}
@@ -40,26 +38,28 @@ int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
nfc_gpio->dwl_req = -EINVAL;
nfc_gpio->ven = -EINVAL;
//required for i2c based chips only
/* irq required for i2c based chips only */
if (interface == PLATFORM_IF_I2C) {
nfc_gpio->irq = of_get_named_gpio(np, DTS_IRQ_GPIO_STR, 0);
if ((!gpio_is_valid(nfc_gpio->irq))) {
pr_err("nfc irq gpio invalid %d\n", nfc_gpio->irq);
pr_err("%s: irq gpio invalid %d\n", __func__,
nfc_gpio->irq);
return -EINVAL;
}
pr_info("%s: irq %d\n", __func__, nfc_gpio->irq);
}
nfc_gpio->ven = of_get_named_gpio(np, DTS_VEN_GPIO_STR, 0);
if ((!gpio_is_valid(nfc_gpio->ven))) {
pr_err("nfc ven gpio invalid %d\n", nfc_gpio->ven);
pr_err("%s: ven gpio invalid %d\n", __func__, nfc_gpio->ven);
return -EINVAL;
}
/* some products like sn220 does not required fw dwl pin */
nfc_gpio->dwl_req = of_get_named_gpio(np, DTS_FWDN_GPIO_STR, 0);
if ((!gpio_is_valid(nfc_gpio->dwl_req)))
pr_warn("nfc dwl_req gpio invalid %d\n", nfc_gpio->dwl_req);
pr_warn("%s: dwl_req gpio invalid %d\n", __func__,
nfc_gpio->dwl_req);
pr_info("%s: %d, %d, %d, %d\n", __func__, nfc_gpio->irq, nfc_gpio->ven,
pr_info("%s: %d, %d, %d\n", __func__, nfc_gpio->irq, nfc_gpio->ven,
nfc_gpio->dwl_req);
return 0;
}
@@ -67,11 +67,11 @@ int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
void set_valid_gpio(int gpio, int value)
{
if (gpio_is_valid(gpio)) {
pr_debug("%s gpio %d value %d\n", __func__, gpio, value);
pr_debug("%s: gpio %d value %d\n", __func__, gpio, value);
gpio_set_value(gpio, value);
// hardware dependent delay
usleep_range(NFC_GPIO_SET_WAIT_TIME_USEC,
NFC_GPIO_SET_WAIT_TIME_USEC + 100);
/* hardware dependent delay */
usleep_range(NFC_GPIO_SET_WAIT_TIME_US,
NFC_GPIO_SET_WAIT_TIME_US + 100);
}
}
@@ -81,7 +81,7 @@ int get_valid_gpio(int gpio)
if (gpio_is_valid(gpio)) {
value = gpio_get_value(gpio);
pr_debug("%s gpio %d value %d\n", __func__, gpio, value);
pr_debug("%s: gpio %d value %d\n", __func__, gpio, value);
}
return value;
}
@@ -92,14 +92,14 @@ void gpio_set_ven(struct nfc_dev *nfc_dev, int value)
if (gpio_get_value(nfc_gpio->ven) != value) {
pr_debug("%s: value %d\n", __func__, value);
/*reset on change in level from high to low */
/* reset on change in level from high to low */
if (value)
ese_cold_reset_release(nfc_dev);
gpio_set_value(nfc_gpio->ven, value);
// hardware dependent delay
usleep_range(NFC_GPIO_SET_WAIT_TIME_USEC,
NFC_GPIO_SET_WAIT_TIME_USEC + 100);
/* hardware dependent delay */
usleep_range(NFC_GPIO_SET_WAIT_TIME_US,
NFC_GPIO_SET_WAIT_TIME_US + 100);
}
}
@@ -111,32 +111,37 @@ int configure_gpio(unsigned int gpio, int flag)
if (gpio_is_valid(gpio)) {
ret = gpio_request(gpio, "nfc_gpio");
if (ret) {
pr_err("%s: unable to request nfc gpio [%d]\n", __func__, gpio);
pr_err("%s: unable to request nfc gpio [%d]\n",
__func__, gpio);
return ret;
}
/*set direction and value for output pin */
/* set direction and value for output pin */
if (flag & GPIO_OUTPUT) {
ret = gpio_direction_output(gpio, (GPIO_HIGH & flag));
pr_debug("nfc o/p gpio %d level %d\n", gpio, gpio_get_value(gpio));
pr_debug("%s: nfc o/p gpio %d level %d\n", __func__,
gpio, gpio_get_value(gpio));
} else {
ret = gpio_direction_input(gpio);
pr_debug("nfc i/p gpio %d\n", gpio);
pr_debug("%s: nfc i/p gpio %d\n", __func__, gpio);
}
if (ret) {
pr_err("%s: unable to set direction for nfc gpio [%d]\n", __func__, gpio);
pr_err("%s: unable to set direction for nfc gpio [%d]\n",
__func__, gpio);
gpio_free(gpio);
return ret;
}
/*Consider value as control for input IRQ pin */
/* Consider value as control for input IRQ pin */
if (flag & GPIO_IRQ) {
ret = gpio_to_irq(gpio);
if (ret < 0) {
pr_err("%s: unable to set irq for nfc gpio [%d]\n", __func__, gpio);
pr_err("%s: unable to set irq [%d]\n", __func__,
gpio);
gpio_free(gpio);
return ret;
}
pr_debug("%s: gpio_to_irq successful [%d]\n", __func__, gpio);
pr_debug("%s: gpio_to_irq successful [%d]\n", __func__,
gpio);
return ret;
}
} else {
@@ -170,20 +175,22 @@ void nfc_misc_unregister(struct nfc_dev *nfc_dev, int count)
}
int nfc_misc_register(struct nfc_dev *nfc_dev,
const struct file_operations *nfc_fops,
int count, char *devname, char *classname)
const struct file_operations *nfc_fops, int count,
char *devname, char *classname)
{
int ret = 0;
ret = alloc_chrdev_region(&nfc_dev->devno, 0, count, devname);
if (ret < 0) {
pr_err("%s: failed to alloc chrdev region ret %d\n", __func__, ret);
pr_err("%s: failed to alloc chrdev region ret %d\n", __func__,
ret);
return ret;
}
nfc_dev->nfc_class = class_create(THIS_MODULE, classname);
if (IS_ERR(nfc_dev->nfc_class)) {
ret = PTR_ERR(nfc_dev->nfc_class);
pr_err("%s: failed to register device class ret %d\n", __func__, ret);
pr_err("%s: failed to register device class ret %d\n", __func__,
ret);
unregister_chrdev_region(nfc_dev->devno, count);
return ret;
}
@@ -199,7 +206,8 @@ int nfc_misc_register(struct nfc_dev *nfc_dev,
nfc_dev->devno, nfc_dev, devname);
if (IS_ERR(nfc_dev->nfc_device)) {
ret = PTR_ERR(nfc_dev->nfc_device);
pr_err("%s: failed to create the device ret %d\n", __func__, ret);
pr_err("%s: failed to create the device ret %d\n", __func__,
ret);
cdev_del(&nfc_dev->c_dev);
class_destroy(nfc_dev->nfc_class);
unregister_chrdev_region(nfc_dev->devno, count);
@@ -208,7 +216,7 @@ int nfc_misc_register(struct nfc_dev *nfc_dev,
return 0;
}
/*
/**
* nfc_ioctl_power_states() - power control
* @nfc_dev: nfc device data structure
* @arg: mode that we want to move to
@@ -271,19 +279,21 @@ static int nfc_ioctl_power_states(struct nfc_dev *nfc_dev, unsigned long arg)
set_valid_gpio(nfc_gpio->dwl_req, 0);
nfc_dev->nfc_state = NFC_STATE_NCI;
} else {
pr_err("%s bad arg %lu\n", __func__, arg);
pr_err("%s: bad arg %lu\n", __func__, arg);
ret = -ENOIOCTLCMD;
}
return ret;
}
/** @brief IOCTL function to be used to set or get data from upper layer.
/**
* nfc_dev_ioctl - used to set or get data from upper layer.
* @pfile file node for opened device.
* @cmd ioctl type from upper layer.
* @arg ioctl arg from upper layer.
*
* @param pfile fil node for opened device.
* @cmd IOCTL type from upper layer.
* @arg IOCTL arg from upper layer.
* NFC and ESE Device power control, based on the argument value
*
* @return 0 on success, error code for failures.
* Return: -ENOIOCTLCMD if arg is not supported, 0 or other in any other case
*/
long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
{
@@ -293,7 +303,7 @@ long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
if (!nfc_dev)
return -ENODEV;
pr_debug("%s cmd = %x arg = %zx\n", __func__, cmd, arg);
pr_debug("%s: cmd = %x arg = %zx\n", __func__, cmd, arg);
switch (cmd) {
case NFC_SET_PWR:
ret = nfc_ioctl_power_states(nfc_dev, arg);
@@ -304,11 +314,8 @@ long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
case ESE_GET_PWR:
ret = nfc_ese_pwr(nfc_dev, ESE_POWER_STATE);
break;
case NFC_GET_IRQ_STATE:
ret = gpio_get_value(nfc_dev->configs.gpio.irq);
break;
default:
pr_err("%s bad cmd %lu\n", __func__, arg);
pr_err("%s: bad cmd %lu\n", __func__, arg);
ret = -ENOIOCTLCMD;
};
return ret;
@@ -316,7 +323,11 @@ long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
int nfc_dev_open(struct inode *inode, struct file *filp)
{
struct nfc_dev *nfc_dev = container_of(inode->i_cdev, struct nfc_dev, c_dev);
struct nfc_dev *nfc_dev =
container_of(inode->i_cdev, struct nfc_dev, c_dev);
if (!nfc_dev)
return -ENODEV;
pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode));
@@ -336,7 +347,11 @@ int nfc_dev_open(struct inode *inode, struct file *filp)
int nfc_dev_close(struct inode *inode, struct file *filp)
{
struct nfc_dev *nfc_dev = container_of(inode->i_cdev, struct nfc_dev, c_dev);
struct nfc_dev *nfc_dev =
container_of(inode->i_cdev, struct nfc_dev, c_dev);
if (!nfc_dev)
return -ENODEV;
pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode));
mutex_lock(&nfc_dev->dev_ref_mutex);
@@ -347,11 +362,12 @@ int nfc_dev_close(struct inode *inode, struct file *filp)
if (nfc_dev->dev_ref_count > 0)
nfc_dev->dev_ref_count = nfc_dev->dev_ref_count - 1;
else {
nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS_NFC);
/* Uncomment below line incase of eSE calls flow is via NFC driver
/*
* Use "ESE_RST_PROT_DIS" as argument
* if eSE calls flow is via NFC driver
* i.e. direct calls from SPI HAL to NFC driver
*/
//nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS);
nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS_NFC);
}
filp->private_data = NULL;
@@ -359,320 +375,20 @@ int nfc_dev_close(struct inode *inode, struct file *filp)
return 0;
}
/**
* get_nfcc_chip_type_dl() - get chip type in fw download command;
* @nfc_dev: nfc device data structure
*
* Perform get version command and determine chip
* type from response.
*
* @Return: enum chip_types value
*
*/
static enum chip_types get_nfcc_chip_type_dl(struct nfc_dev *nfc_dev)
{
int ret = 0;
int cmd_length = 0;
uint8_t *cmd = nfc_dev->write_kbuf;
uint8_t *rsp = nfc_dev->read_kbuf;
enum chip_types chip_type = CHIP_UNKNOWN;
*cmd++ = 0x00;
*cmd++ = 0x04;
*cmd++ = 0xF1;
*cmd++ = 0x00;
*cmd++ = 0x00;
*cmd++ = 0x00;
*cmd++ = 0x6E;
*cmd++ = 0xEF;
cmd_length = cmd - nfc_dev->write_kbuf;
pr_debug("%s:Sending GET_VERSION cmd of size=%d\n", __func__, cmd_length);
ret = nfc_dev->nfc_write(nfc_dev, nfc_dev->write_kbuf, cmd_length, MAX_RETRY_COUNT);
if (ret <= 0) {
pr_err("%s: - nfc get version cmd error ret %d\n", __func__, ret);
goto err;
}
memset(rsp, 0x00, DL_GET_VERSION_RSP_LEN_2);
pr_debug("%s:Reading response of GET_VERSION cmd\n", __func__);
ret = nfc_dev->nfc_read(nfc_dev, rsp, DL_GET_VERSION_RSP_LEN_2, NCI_CMD_RSP_TIMEOUT);
if (ret <= 0) {
pr_err("%s: - nfc get version rsp error ret %d\n", __func__, ret);
goto err;
}
if (rsp[0] == FW_MSG_CMD_RSP && ret >= DL_GET_VERSION_RSP_LEN_2) {
nfc_dev->fw_major_version = rsp[FW_MAJOR_VER_OFFSET];
if (rsp[FW_ROM_CODE_VER_OFFSET] == SN1XX_ROM_VER &&
rsp[FW_MAJOR_VER_OFFSET] == SN1xx_MAJOR_VER)
chip_type = CHIP_SN1XX;
else if (rsp[FW_ROM_CODE_VER_OFFSET] == SN220_ROM_VER &&
rsp[FW_MAJOR_VER_OFFSET] == SN220_MAJOR_VER)
chip_type = CHIP_SN220;
pr_info("%s:NFC Chip Type 0x%02x Rom Version 0x%02x FW Minor 0x%02x Major 0x%02x\n",
__func__, rsp[3], rsp[4], rsp[6], rsp[7]);
}
err:
return chip_type;
}
/**
* get_nfcc_session_state_dl() - gets the session state
* @nfc_dev: nfc device data structure
*
* Performs get session command and determine
* the nfcc state based on session status.
*
* @Return nfcc state based on session status.
* NFC_STATE_FW_TEARED if sessionis not closed
* NFC_STATE_FW_DWL if session closed
* NFC_STATE_UNKNOWN in error cases.
*/
enum nfc_state_flags get_nfcc_session_state_dl(struct nfc_dev *nfc_dev)
{
int ret = 0;
int cmd_length = 0;
uint8_t *cmd = nfc_dev->write_kbuf;
uint8_t *rsp = nfc_dev->read_kbuf;
enum nfc_state_flags nfc_state = NFC_STATE_UNKNOWN;
*cmd++ = 0x00;
*cmd++ = 0x04;
*cmd++ = 0xF2;
*cmd++ = 0x00;
*cmd++ = 0x00;
*cmd++ = 0x00;
*cmd++ = 0xF5;
*cmd++ = 0x33;
cmd_length = cmd - nfc_dev->write_kbuf;
pr_debug("%s:Sending GET_SESSION_STATE cmd of size=%d\n", __func__, cmd_length);
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");
pr_err("%s: ven low - nfcc powered off\n", __func__);
return -ENODEV;
}
if (get_valid_gpio(nfc_gpio->dwl_req) == 1) {
pr_err("FW download in-progress\n");
pr_err("%s: fw download in-progress\n", __func__);
return -EBUSY;
}
if (nfc_dev->nfc_state != NFC_STATE_NCI) {
pr_err("FW download state\n");
pr_err("%s: fw download state\n", __func__);
return -EBUSY;
}
return 0;