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NFC: driver: Add NFC secure zone status query in driver

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Implemented secure zone status query calls in NFC driver

Change-Id: If41681ec14dbc53401182667df1256d5818f8576
This commit is contained in:
Mallikarjun S T
2022-07-20 11:35:00 +05:30
parent 0ff0ebef92
commit 9beac5423e
5 changed files with 128 additions and 20 deletions
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104
nfc/common.c
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@@ -27,7 +27,6 @@
#include "common.h"
static int secure_zone = 1;
int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
uint8_t interface)
@@ -131,14 +130,15 @@ int get_valid_gpio(int gpio)
void gpio_set_ven(struct nfc_dev *nfc_dev, int value)
{
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
if(!nfc_dev->secure_zone) {
if (gpio_get_value(nfc_gpio->ven) != value) {
pr_debug("%s: value %d\n", __func__, value);
if (gpio_get_value(nfc_gpio->ven) != value) {
pr_debug("%s: value %d\n", __func__, value);
gpio_set_value(nfc_gpio->ven, value);
/* hardware dependent delay */
usleep_range(NFC_GPIO_SET_WAIT_TIME_US,
NFC_GPIO_SET_WAIT_TIME_US + 100);
gpio_set_value(nfc_gpio->ven, value);
/* hardware dependent delay */
usleep_range(NFC_GPIO_SET_WAIT_TIME_US,
NFC_GPIO_SET_WAIT_TIME_US + 100);
}
}
}
@@ -407,9 +407,12 @@ long nfc_dev_compat_ioctl(struct file *pfile, unsigned int cmd,
int nfc_post_init(struct nfc_dev *nfc_dev)
{
int ret=0;
static int post_init_success;
struct platform_configs nfc_configs;
struct platform_gpio *nfc_gpio;
if(post_init_success)
return 0;
if (!nfc_dev)
return -ENODEV;
@@ -449,12 +452,79 @@ int nfc_post_init(struct nfc_dev *nfc_dev)
/*Initialising sempahore to disbale NFC Ven GPIO only after eSE is power off flag is set */
sema_init(&sem_eSE_pwr_off,0);
post_init_success = 1;
pr_info("%s success\n", __func__);
return 0;
}
/**
* nfc_hw_secure_check() - Checks the NFC secure zone status
*
* Queries the TZ secure libraries if NFC is in secure zone statue or not.
*
* Return: 0 if FEATURE_NOT_SUPPORTED/PERIPHERAL_NOT_FOUND/state is 2 and
* return 1(non-secure) otherwise
*/
bool nfc_hw_secure_check(void)
{
struct Object client_env;
struct Object app_object;
u32 wifi_uid = HW_NFC_UID;
union ObjectArg obj_arg[2] = {{{0, 0}}};
int ret;
bool retstat = 1;
u8 state = 0;
/* get rootObj */
ret = get_client_env_object(&client_env);
if (ret) {
pr_err("Failed to get client_env_object, ret: %d\n", ret);
return 1;
}
ret = IClientEnv_open(client_env, HW_STATE_UID, &app_object);
if (ret) {
pr_debug("Failed to get app_object, ret: %d\n", ret);
if (ret == FEATURE_NOT_SUPPORTED) {
retstat = 0; /* Do not Assert */
pr_debug("Secure HW feature not supported\n");
}
goto exit_release_clientenv;
}
obj_arg[0].b = (struct ObjectBuf) {&wifi_uid, sizeof(u32)};
obj_arg[1].b = (struct ObjectBuf) {&state, sizeof(u8)};
ret = Object_invoke(app_object, HW_OP_GET_STATE, obj_arg,
ObjectCounts_pack(1, 1, 0, 0));
pr_info("SMC invoke ret: %d state: %d\n", ret, state);
if (ret) {
if (ret == PERIPHERAL_NOT_FOUND) {
retstat = 0; /* Do not Assert */
pr_debug("Secure HW mode is not updated. Peripheral not found\n");
}
goto exit_release_app_obj;
}
if (state == 1) {
/*Secure Zone*/
retstat = 1;
} else {
/*Non-Secure Zone*/
retstat = 0;
}
exit_release_app_obj:
Object_release(app_object);
exit_release_clientenv:
Object_release(client_env);
return retstat;
}
/**
* nfc_dynamic_protection_ioctl() - dynamic protection control
* @nfc_dev: nfc device data structure
@@ -491,7 +561,7 @@ int nfc_dynamic_protection_ioctl(struct nfc_dev *nfc_dev, unsigned long sec_zone
}
ret = nfc_ioctl_power_states(nfc_dev, 0);
/*set driver as secure zone, such that no ioctl calls are allowed*/
secure_zone=1;
nfc_dev->secure_zone = true;
pr_info("Driver Secure flag set successful\n");
} else {
ret = -1;
@@ -499,7 +569,7 @@ int nfc_dynamic_protection_ioctl(struct nfc_dev *nfc_dev, unsigned long sec_zone
}
else if(sec_zone_trans == 0) {
chk_eSE_pwr_off = 0;
secure_zone=0;
nfc_dev->secure_zone = false;
if(init_flag) {
/*Initialize once,only during the first non-secure entry*/
@@ -508,7 +578,8 @@ int nfc_dynamic_protection_ioctl(struct nfc_dev *nfc_dev, unsigned long sec_zone
init_flag=0;
}
else {
ret = nfc_ioctl_power_states(nfc_dev, 1);
if(!gpio_get_value(nfc_gpio->ven))
ret = nfc_ioctl_power_states(nfc_dev, 1);
}
pr_info("Func Driver Secure flag clear successful\n");
} else {
@@ -541,7 +612,7 @@ long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg)
return -ENODEV;
/*Avoiding ioctl call in secure zone*/
if(secure_zone) {
if(nfc_dev->secure_zone) {
if(cmd!=NFC_SECURE_ZONE) {
pr_debug("nfc_dev_ioctl failed\n");
return -1;
@@ -665,10 +736,11 @@ int nfc_dev_close(struct inode *inode, struct file *filp)
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("%s: ven low - nfcc powered off\n", __func__);
return -ENODEV;
if(!nfc_dev->secure_zone) {
if (!gpio_get_value(nfc_gpio->ven)) {
pr_err("%s: ven low - nfcc powered off\n", __func__);
return -ENODEV;
}
}
if (get_valid_gpio(nfc_gpio->dwl_req) == 1) {
pr_err("%s: fw download in-progress\n", __func__);