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Updated corresponding to - NFC_AR_00_E000_12.02.01_OpnSrc

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This commit is contained in:
nxf35421
2021-02-26 15:55:00 +05:30
parent 2ec82a2bfd
commit 0d82b80e37
10 changed files with 1946 additions and 1886 deletions
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506
nfc/common.c
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@@ -1,4 +1,5 @@
/******************************************************************************
* 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
@@ -22,16 +23,13 @@
#include <linux/version.h>
#include "common.h"
#include "common_ese.h"
#if defined(RECOVERY_ENABLE)
#include "recovery_seq.h"
#endif
int nfc_parse_dt(struct device *dev, platform_configs_t *nfc_configs,
int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
uint8_t interface)
{
struct device_node *np = dev->of_node;
platform_gpio_t *nfc_gpio = &nfc_configs->gpio;
struct platform_gpio *nfc_gpio = &nfc_configs->gpio;
if (!np) {
pr_err("nfc of_node NULL\n");
@@ -58,9 +56,8 @@ int nfc_parse_dt(struct device *dev, platform_configs_t *nfc_configs,
}
nfc_gpio->dwl_req = of_get_named_gpio(np, DTS_FWDN_GPIO_STR, 0);
if ((!gpio_is_valid(nfc_gpio->dwl_req))) {
if ((!gpio_is_valid(nfc_gpio->dwl_req)))
pr_warn("nfc dwl_req gpio invalid %d\n", nfc_gpio->dwl_req);
}
pr_info("%s: %d, %d, %d, %d\n", __func__, nfc_gpio->irq, nfc_gpio->ven,
nfc_gpio->dwl_req);
@@ -80,7 +77,8 @@ void set_valid_gpio(int gpio, int value)
int get_valid_gpio(int gpio)
{
int value = -1;
int value = -EINVAL;
if (gpio_is_valid(gpio)) {
value = gpio_get_value(gpio);
pr_debug("%s gpio %d value %d\n", __func__, gpio, value);
@@ -90,13 +88,14 @@ int get_valid_gpio(int gpio)
void gpio_set_ven(struct nfc_dev *nfc_dev, int value)
{
platform_gpio_t *nfc_gpio = &nfc_dev->configs.gpio;
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
if (gpio_get_value(nfc_gpio->ven) != value) {
pr_debug("%s: gpio_set_ven %d\n", __func__, value);
pr_debug("%s: value %d\n", __func__, value);
/*reset on change in level from high to low */
if (value) {
common_ese_on_hard_reset(nfc_dev);
}
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,
@@ -107,6 +106,7 @@ void gpio_set_ven(struct nfc_dev *nfc_dev, int value)
int configure_gpio(unsigned int gpio, int flag)
{
int ret;
pr_debug("%s: nfc gpio [%d] flag [%01x]\n", __func__, gpio, flag);
if (gpio_is_valid(gpio)) {
ret = gpio_request(gpio, "nfc_gpio");
@@ -146,21 +146,21 @@ int configure_gpio(unsigned int gpio, int flag)
return ret;
}
void gpio_free_all(nfc_dev_t *nfc_dev)
void gpio_free_all(struct nfc_dev *nfc_dev)
{
platform_gpio_t *nfc_gpio = &nfc_dev->configs.gpio;
if (gpio_is_valid(nfc_gpio->dwl_req)) {
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
if (gpio_is_valid(nfc_gpio->dwl_req))
gpio_free(nfc_gpio->dwl_req);
}
if (gpio_is_valid(nfc_gpio->irq)) {
if (gpio_is_valid(nfc_gpio->irq))
gpio_free(nfc_gpio->irq);
}
if (gpio_is_valid(nfc_gpio->ven)) {
if (gpio_is_valid(nfc_gpio->ven))
gpio_free(nfc_gpio->ven);
}
}
void nfc_misc_unregister(nfc_dev_t *nfc_dev, int count)
void nfc_misc_unregister(struct nfc_dev *nfc_dev, int count)
{
pr_debug("%s: entry\n", __func__);
device_destroy(nfc_dev->nfc_class, nfc_dev->devno);
@@ -169,11 +169,12 @@ void nfc_misc_unregister(nfc_dev_t *nfc_dev, int count)
unregister_chrdev_region(nfc_dev->devno, count);
}
int nfc_misc_register(nfc_dev_t *nfc_dev,
int nfc_misc_register(struct nfc_dev *nfc_dev,
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);
@@ -217,10 +218,11 @@ int nfc_misc_register(nfc_dev_t *nfc_dev,
*
* Return: -ENOIOCTLCMD if arg is not supported, 0 in any other case
*/
static int nfc_ioctl_power_states(nfc_dev_t *nfc_dev, unsigned long arg)
static int nfc_ioctl_power_states(struct nfc_dev *nfc_dev, unsigned long arg)
{
int ret = 0;
platform_gpio_t *nfc_gpio = &nfc_dev->configs.gpio;
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
if (arg == NFC_POWER_OFF) {
/*
* We are attempting a hardware reset so let us disable
@@ -287,6 +289,7 @@ long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
{
int ret = 0;
struct nfc_dev *nfc_dev = pfile->private_data;
if (!nfc_dev)
return -ENODEV;
@@ -301,13 +304,6 @@ 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_PLATFORM_TYPE:
ret = nfc_dev->interface;
break;
case NFC_GET_NFC_STATE:
ret = nfc_dev->nfc_state;
pr_debug("nfc get state %d\n", ret);
break;
case NFC_GET_IRQ_STATE:
ret = gpio_get_value(nfc_dev->configs.gpio.irq);
break;
@@ -320,7 +316,8 @@ long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
int nfc_dev_open(struct inode *inode, struct file *filp)
{
nfc_dev_t *nfc_dev = container_of(inode->i_cdev, nfc_dev_t, c_dev);
struct nfc_dev *nfc_dev = container_of(inode->i_cdev, struct nfc_dev, c_dev);
pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode));
mutex_lock(&nfc_dev->dev_ref_mutex);
@@ -339,7 +336,8 @@ int nfc_dev_open(struct inode *inode, struct file *filp)
int nfc_dev_close(struct inode *inode, struct file *filp)
{
nfc_dev_t *nfc_dev = container_of(inode->i_cdev, nfc_dev_t, c_dev);
struct nfc_dev *nfc_dev = container_of(inode->i_cdev, struct nfc_dev, c_dev);
pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode));
mutex_lock(&nfc_dev->dev_ref_mutex);
if (nfc_dev->dev_ref_count == 1) {
@@ -351,7 +349,8 @@ int nfc_dev_close(struct inode *inode, struct file *filp)
else {
nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS_NFC);
/* Uncomment below line incase of eSE calls flow is via NFC driver
* i.e. direct calls from SPI HAL to NFC driver*/
* i.e. direct calls from SPI HAL to NFC driver
*/
//nfc_ese_pwr(nfc_dev, ESE_RST_PROT_DIS);
}
filp->private_data = NULL;
@@ -360,248 +359,321 @@ int nfc_dev_close(struct inode *inode, struct file *filp)
return 0;
}
static int get_nfcc_boot_state(struct nfc_dev *nfc_dev)
/**
* 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;
char get_version_cmd[] = { 0x00, 0x04, 0xF1, 0x00, 0x00, 0x00, 0x6E, 0xEF };
char get_session_state_cmd[] = { 0x00, 0x04, 0xF2, 0x00, 0x00, 0x00, 0xF5, 0x33 };
char rsp_buf[MAX_BUFFER_SIZE];
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;
pr_debug("%s:Sending GET_VERSION cmd\n", __func__);
ret = nfc_dev->nfc_write(nfc_dev, get_version_cmd,
sizeof(get_version_cmd), MAX_RETRY_COUNT);
*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_buf, 0x00, MAX_BUFFER_SIZE);
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_buf, DL_GET_VERSION_RSP_LEN_2, NCI_CMD_RSP_TIMEOUT);
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;
} else if (rsp_buf[0] == FW_MSG_CMD_RSP
&& ret >= DL_GET_VERSION_RSP_LEN_2) {
#if defined(RECOVERY_ENABLE)
nfc_dev->fw_major_version = rsp_buf[FW_MAJOR_VER_OFFSET];
/* recvoery neeeded only for SN1xx */
if(rsp_buf[FW_ROM_CODE_VER_OFFSET] == RECOVERY_FW_SUPPORTED_ROM_VER &&
nfc_dev->fw_major_version == RECOVERY_FW_SUPPORTED_MAJOR_VER)
nfc_dev->recovery_required = true;
#endif
pr_info("%s:NFC chip_type 0x%02x rom_version 0x%02x fw_minor 0x%02x fw_major 0x%02x\n",
__func__, rsp_buf[3], rsp_buf[4], rsp_buf[6], rsp_buf[7]);
} else if (rsp_buf[0] != FW_MSG_CMD_RSP
&& ret >= (NCI_HDR_LEN + rsp_buf[NCI_PAYLOAD_LEN_IDX])) {
pr_info("%s:NFC response bytes 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n", __func__,
rsp_buf[0], rsp_buf[1], rsp_buf[2], rsp_buf[3], rsp_buf[3]);
pr_debug("%s NFCC booted in NCI mode %d\n", __func__, __LINE__);
return NFC_STATE_NCI;
}
if (rsp[0] == FW_MSG_CMD_RSP && ret >= DL_GET_VERSION_RSP_LEN_2) {
pr_debug("%s:Sending GET_SESSION_STATE cmd \n", __func__);
ret = nfc_dev->nfc_write(nfc_dev, get_session_state_cmd,
sizeof(get_session_state_cmd),
MAX_RETRY_COUNT);
if (ret <= 0) {
pr_err("%s: - nfc get session state cmd err ret %d\n", __func__, ret);
goto err;
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]);
}
memset(rsp_buf, 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_buf, DL_GET_SESSION_STATE_RSP_LEN, NCI_CMD_RSP_TIMEOUT);
if (ret <= 0) {
pr_err("%s: - nfc get session state rsp err %d\n", __func__, ret);
goto err;
}
pr_debug("Response bytes are %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x",
rsp_buf[0], rsp_buf[1], rsp_buf[2], rsp_buf[3], rsp_buf[4], rsp_buf[5],
rsp_buf[6], rsp_buf[7]);
/*verify fw in non-teared state */
if (rsp_buf[GET_SESSION_STS_OFF] != NFCC_SESSION_STS_CLOSED) {
pr_debug("%s NFCC booted in teared fw state %d\n", __func__, __LINE__);
return NFC_STATE_FW_TEARED;
}
pr_debug("%s NFCC booted in FW DN mode %d\n", __func__, __LINE__);
return NFC_STATE_FW_DWL;
err:
pr_err("%s Unlikely NFCC not booted in FW DN mode %d\n", __func__, __LINE__);
return NFC_STATE_UNKNOWN;
return chip_type;
}
int validate_nfc_state_nci(nfc_dev_t *nfc_dev)
{
platform_gpio_t *nfc_gpio = &nfc_dev->configs.gpio;
if (!gpio_get_value(nfc_gpio->ven)) {
pr_err("VEN LOW - NFCC powered off\n");
return -ENODEV;
} else {
if (get_valid_gpio(nfc_gpio->dwl_req) == 1) {
pr_err("FW download in-progress\n");
return -EBUSY;
} else if (nfc_dev->nfc_state == NFC_STATE_FW_DWL) {
pr_err("FW download state \n");
return -EBUSY;
}
}
return 0;
}
static int set_nfcc_nci_state(struct nfc_dev *nfc_dev)
/**
* 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;
char dl_reset_cmd[] = { 0x00, 0x04, 0xF0, 0x00, 0x00, 0x00, 0x18, 0x5B };
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;
pr_debug("%s:Sending DL_RESET to boot in NCI mode\n", __func__);
ret = nfc_dev->nfc_write(nfc_dev, dl_reset_cmd,
sizeof(dl_reset_cmd), MAX_RETRY_COUNT);
*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 dl reset cmd err ret %d\n", __func__, ret);
pr_err("%s: - nfc get session cmd error ret %d\n", __func__, ret);
goto err;
}
usleep_range(NFC_SOFT_RESET_WAIT_TIME_USEC,
NFC_SOFT_RESET_WAIT_TIME_USEC + 100);
pr_debug("%s NFCC booted in NCI mode %d\n", __func__, __LINE__);
return 0;
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:
pr_err("%s Unlikely NFCC not booted in NCI mode %d\n", __func__, __LINE__);
return -1;
return nfc_state;
}
static bool do_nci_reset(nfc_dev_t *nfc_dev) {
const uint8_t cmd_reset_nci[] = {0x20, 0x00, 0x01, 0x00};
char rsp_buf[MAX_BUFFER_SIZE];
int status = 0;
/**
* 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;
if (NULL == nfc_dev) {
pr_err("%s invalid params ", __func__);
return false;
}
pr_debug("%s Entry \n", __func__);
gpio_set_ven(nfc_dev, 0);
gpio_set_ven(nfc_dev, 1);
pr_debug(" %s send core reset cmd \n", __func__);
status = nfc_dev->nfc_write(nfc_dev, cmd_reset_nci,
sizeof(cmd_reset_nci), NO_RETRY);
if (status <= 0) {
pr_err(" %s: nfc nci core reset cmd err status %d\n", __func__, status);
return false;
*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);
pr_debug(" %s Reading response of NCI reset \n", __func__);
memset(rsp_buf, 0x00, MAX_BUFFER_SIZE);
status = nfc_dev->nfc_read(nfc_dev, rsp_buf, MAX_BUFFER_SIZE, NCI_RESET_RESP_TIMEOUT);
if (status <= 0) {
pr_err(" %s - nfc nci rest rsp error status %d\n", __func__, status);
nfc_dev->nfc_disable_intr(nfc_dev);
return false;
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 0x%02x 0x%02x 0x%02x \n",
__func__, rsp_buf[0], rsp_buf[1],rsp_buf[2], rsp_buf[3]);
if(rsp_buf[0] != NCI_MSG_RSP) {
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");
nfc_dev->nfc_disable_intr(nfc_dev);
return false;
pr_err("%s invalid nci core reset response", __func__);
goto err_disable_intr;
}
memset(rsp_buf, 0x00, MAX_BUFFER_SIZE);
memset(rsp, 0x00, NCI_RESET_NTF_LEN);
/* read nci rest response ntf */
status = nfc_dev->nfc_read(nfc_dev, rsp_buf, MAX_BUFFER_SIZE, NCI_CMD_RSP_TIMEOUT);
if (status <= 0) {
pr_err("%s - nfc nci rest rsp ntf error status %d\n"
, __func__, status);
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;
}
pr_debug(" %s:NFC NCI Reset Response ntf 0x%02x 0x%02x 0x%02x 0x%02x \n",
__func__, rsp_buf[0], rsp_buf[1],rsp_buf[2], rsp_buf[3]);
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);
gpio_set_ven(nfc_dev, 0);
gpio_set_ven(nfc_dev, 1);
return true;
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;
uint8_t nfc_state = NFC_STATE_UNKNOWN;
if(do_nci_reset(nfc_dev)) {
pr_info("%s recovery not required", __func__);
return ret;
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;
}
nfc_dev->nfc_enable_intr(nfc_dev);
/*set download mode for i2c products with dwl pin */
enable_dwnld_mode(nfc_dev, true);
/*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;
}
nfc_state = get_nfcc_boot_state(nfc_dev);
/*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_DWL:
usleep_range(NFC_GPIO_SET_WAIT_TIME_USEC,
NFC_GPIO_SET_WAIT_TIME_USEC + 100);
if (set_nfcc_nci_state(nfc_dev)) {
pr_debug("%s: - NFCC DL Reset Fails\n", __func__);
} else {
nfc_state = NFC_STATE_NCI;
/*set NCI mode for i2c products with dwl pin */
enable_dwnld_mode(nfc_dev, false);
}
/* fall-through */
case NFC_STATE_NCI:
nfc_dev->nfc_ven_enabled = true;
pr_debug("%s: - NFCC HW detected\n", __func__);
break;
case NFC_STATE_FW_TEARED:
pr_warn("%s: - NFCC FW Teared State\n", __func__);
#if defined(RECOVERY_ENABLE)
if(nfc_dev->recovery_required &&
(do_recovery(nfc_dev) == STATUS_SUCCESS)) {
pr_debug("%s: - NFCC HW detected\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
nfc_dev->nfc_ven_enabled = true;
/*fallthrough*/
case NFC_STATE_FW_DWL:
case NFC_STATE_NCI:
break;
case NFC_STATE_UNKNOWN:
default:
ret = -ENXIO;
pr_debug("%s: - NFCC HW not available\n", __func__);
pr_err("%s: - NFCC HW not available\n", __func__);
goto err;
};
nfc_dev->nfc_disable_intr(nfc_dev);
if (nfc_state == NFC_STATE_FW_TEARED) {
nfc_state = NFC_STATE_FW_DWL;
}
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;
}
void enable_dwnld_mode(nfc_dev_t* nfc_dev, bool value) {
if(nfc_dev != NULL) {
platform_gpio_t *nfc_gpio = &nfc_dev->configs.gpio;
if (get_valid_gpio(nfc_gpio->dwl_req) != -1) {
set_valid_gpio(nfc_gpio->dwl_req, value);
gpio_set_ven(nfc_dev, 0);
gpio_set_ven(nfc_dev, 1);
}
}
}
void set_nfcc_state_from_rsp(struct nfc_dev *dev, const char *buf,
const int count)
int validate_nfc_state_nci(struct nfc_dev *nfc_dev)
{
int packet_size = 0;
if (buf[0] == FW_MSG_CMD_RSP && buf[1] >= FW_MIN_PAYLOAD_LEN) {
packet_size = FW_HDR_LEN + buf[FW_PAYLOAD_LEN_IDX] + FW_CRC_LEN;
if (packet_size == count && dev->nfc_state == NFC_STATE_NCI)
dev->nfc_state = NFC_STATE_FW_DWL;
} else {
packet_size = NCI_HDR_LEN + buf[NCI_PAYLOAD_LEN_IDX];
if (packet_size == count && dev->nfc_state == NFC_STATE_FW_DWL)
dev->nfc_state = NFC_STATE_NCI;
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 (count != packet_size) {
pr_err("%s: Unlikely mismatch in packet size received (%d/%d)/\n", __func__,
packet_size, count);
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;
}