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NFC: driver: secure status check while reset gpio write

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Implemented code snippet to query secure status while writing into NFC
reset GPIO pin.

Change-Id: I7b5ae69e5f6497d0f427559405f589578482d2e1
This commit is contained in:
Mallikarjun S T
2022-10-31 14:53:49 +05:30
committed by Gerrit - the friendly Code Review server
parent a3c87684dc
commit d77433930f
1 changed files with 33 additions and 20 deletions
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41
nfc/common.c
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@@ -26,6 +26,7 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/pinctrl/qcom-pinctrl.h> #include <linux/pinctrl/qcom-pinctrl.h>
#include "common.h" #include "common.h"
bool secure_peripheral_not_found = true;
int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs, int nfc_parse_dt(struct device *dev, struct platform_configs *nfc_configs,
@@ -131,16 +132,23 @@ int get_valid_gpio(int gpio)
void gpio_set_ven(struct nfc_dev *nfc_dev, int value) void gpio_set_ven(struct nfc_dev *nfc_dev, int value)
{ {
struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio; struct platform_gpio *nfc_gpio = &nfc_dev->configs.gpio;
if(!nfc_dev->secure_zone) {
if (gpio_get_value(nfc_gpio->ven) != value) { if (gpio_get_value(nfc_gpio->ven) != value) {
pr_debug("%s: value %d\n", __func__, value); pr_debug("%s: value %d\n", __func__, value);
if(secure_peripheral_not_found)
{
/*secure peripheral feature is not enabled*/
gpio_set_value(nfc_gpio->ven, value); gpio_set_value(nfc_gpio->ven, value);
}
else
{
/*secure peripheral feature is enabled*/
if(!nfc_hw_secure_check())
gpio_set_value(nfc_gpio->ven, value);
}
/* hardware dependent delay */ /* hardware dependent delay */
usleep_range(NFC_GPIO_SET_WAIT_TIME_US, usleep_range(NFC_GPIO_SET_WAIT_TIME_US,
NFC_GPIO_SET_WAIT_TIME_US + 100); NFC_GPIO_SET_WAIT_TIME_US + 100);
} }
}
} }
int configure_gpio(unsigned int gpio, int flag) int configure_gpio(unsigned int gpio, int flag)
@@ -504,19 +512,19 @@ int nfc_post_init(struct nfc_dev *nfc_dev)
* *
* Queries the TZ secure libraries if NFC is in secure zone statue or not. * Queries the TZ secure libraries if NFC is in secure zone statue or not.
* *
* Return: 0 if FEATURE_NOT_SUPPORTED or PERIPHERAL_NOT_FOUND or state = 2(non-secure zone) and * Return: 0 if FEATURE_NOT_SUPPORTED or PERIPHERAL_NOT_FOUND or nfc_sec_state = 2(non-secure zone) and
* return 1 if state = 1(secure zone) or error otherwise * return 1 if nfc_sec_state = 1(secure zone) or error otherwise
*/ */
bool nfc_hw_secure_check(void) bool nfc_hw_secure_check(void)
{ {
struct Object client_env; struct Object client_env;
struct Object app_object; struct Object app_object;
u32 nfc_uid = HW_NFC_UID; u32 nfc_uid = HW_NFC_UID;
union ObjectArg obj_arg[2] = {{{0, 0}}}; union ObjectArg obj_arg[2] = {{{0, 0}}};
int ret; int ret;
bool retstat = 1; bool retstat = 1;
u8 state = 0; u8 nfc_sec_state = 0;
/* get rootObj */ /* get rootObj */
ret = get_client_env_object(&client_env); ret = get_client_env_object(&client_env);
if (ret) { if (ret) {
@@ -535,11 +543,11 @@ int nfc_post_init(struct nfc_dev *nfc_dev)
} }
obj_arg[0].b = (struct ObjectBuf) {&nfc_uid, sizeof(u32)}; obj_arg[0].b = (struct ObjectBuf) {&nfc_uid, sizeof(u32)};
obj_arg[1].b = (struct ObjectBuf) {&state, sizeof(u8)}; obj_arg[1].b = (struct ObjectBuf) {&nfc_sec_state, sizeof(u8)};
ret = Object_invoke(app_object, HW_OP_GET_STATE, obj_arg, ret = Object_invoke(app_object, HW_OP_GET_STATE, obj_arg,
ObjectCounts_pack(1, 1, 0, 0)); ObjectCounts_pack(1, 1, 0, 0));
pr_info("TZ ret: %d state: %d\n", ret, state); pr_info("TZ ret: %d nfc_sec_state: %d\n", ret, nfc_sec_state);
if (ret) { if (ret) {
if (ret == PERIPHERAL_NOT_FOUND) { if (ret == PERIPHERAL_NOT_FOUND) {
retstat = 0; /* Do not Assert */ retstat = 0; /* Do not Assert */
@@ -548,7 +556,12 @@ int nfc_post_init(struct nfc_dev *nfc_dev)
goto exit_release_app_obj; goto exit_release_app_obj;
} }
if (state == 1) { secure_peripheral_not_found = false;
/* Refer peripheral state utilities for different states of NFC peripherals;
* path: vendor/qcom/proprietary/securemsm/peripheralStateUtils/inc/peripheralStateUtils.h
*/
if (nfc_sec_state == 1) {
/*Secure Zone*/ /*Secure Zone*/
retstat = 1; retstat = 1;
} else { } else {
@@ -556,13 +569,13 @@ int nfc_post_init(struct nfc_dev *nfc_dev)
retstat = 0; retstat = 0;
} }
exit_release_app_obj: exit_release_app_obj:
Object_release(app_object); Object_release(app_object);
exit_release_clientenv: exit_release_clientenv:
Object_release(client_env); Object_release(client_env);
return retstat; return retstat;
} }
/** /**
* nfc_dynamic_protection_ioctl() - dynamic protection control * nfc_dynamic_protection_ioctl() - dynamic protection control