From 75f81e6e24b7408b949bef6852fbf0eb7b1fd1d5 Mon Sep 17 00:00:00 2001
From: Felipe Moura <moura.fmo@gmail.com>
Date: Fri, 23 Aug 2024 11:48:26 -0300
Subject: [PATCH] stm32f4discovery - add mfrc522 rfid support

---
 .../stm32f4discovery/src/stm32_bringup.c      | 12 ++++++++++++
 .../stm32/stm32f4discovery/src/stm32_spi.c    | 19 +++++++++++++++++--
 .../stm32f4discovery/src/stm32f4discovery.h   |  3 +++
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/boards/arm/stm32/stm32f4discovery/src/stm32_bringup.c b/boards/arm/stm32/stm32f4discovery/src/stm32_bringup.c
index 125fecee12..c9dbb99e16 100644
--- a/boards/arm/stm32/stm32f4discovery/src/stm32_bringup.c
+++ b/boards/arm/stm32/stm32f4discovery/src/stm32_bringup.c
@@ -58,6 +58,10 @@
 #include "stm32_apds9960.h"
 #endif
 
+#ifdef CONFIG_CL_MFRC522
+#include "stm32_mfrc522.h"
+#endif
+
 #include "stm32f4discovery.h"
 
 /* Conditional logic in stm32f4discovery.h will determine if certain features
@@ -609,5 +613,13 @@ int stm32_bringup(void)
   usbdev_adb_initialize();
 #endif
 
+#ifdef CONFIG_CL_MFRC522
+  ret = stm32_mfrc522initialize("/dev/rfid0");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_mfrc522initialize() failed: %d\n", ret);
+    }
+#endif
+
   return ret;
 }
diff --git a/boards/arm/stm32/stm32f4discovery/src/stm32_spi.c b/boards/arm/stm32/stm32f4discovery/src/stm32_spi.c
index 6b94c2932d..a4ea656473 100644
--- a/boards/arm/stm32/stm32f4discovery/src/stm32_spi.c
+++ b/boards/arm/stm32/stm32f4discovery/src/stm32_spi.c
@@ -67,9 +67,14 @@ void weak_function stm32_spidev_initialize(void)
   stm32_configgpio(GPIO_W5500_INTR);
 #endif
 
-#ifdef CONFIG_STM32_SPI1
+#if defined(CONFIG_STM32_SPI1) && defined(CONFIG_SENSORS_LIS3MDL)
   stm32_configgpio(GPIO_CS_MEMS);    /* MEMS chip select */
 #endif
+
+#if defined(CONFIG_STM32_SPI1) && defined(CONFIG_CL_MFRC522)
+  stm32_configgpio(GPIO_CS_MFRC522);  /* MFRC522 chip select */
+#endif
+
 #if defined(CONFIG_STM32_SPI2) && defined(CONFIG_SENSORS_MAX31855)
   stm32_configgpio(GPIO_MAX31855_CS); /* MAX31855 chip select */
 #endif
@@ -176,11 +181,21 @@ void stm32_spi1select(struct spi_dev_s *dev, uint32_t devid,
     {
       stm32_gpiowrite(GPIO_OLED_CS, !selected);
     }
-  else
 #endif
+
+#if defined (CONFIG_SENSORS_LIS3MDL)
+  if (devid == SPIDEV_ACCELEROMETER(0))
     {
       stm32_gpiowrite(GPIO_CS_MEMS, !selected);
     }
+#endif
+
+#if defined(CONFIG_CL_MFRC522)
+  if (devid == SPIDEV_CONTACTLESS(0))
+    {
+      stm32_gpiowrite(GPIO_CS_MFRC522, !selected);
+    }
+#endif
 }
 
 uint8_t stm32_spi1status(struct spi_dev_s *dev, uint32_t devid)
diff --git a/boards/arm/stm32/stm32f4discovery/src/stm32f4discovery.h b/boards/arm/stm32/stm32f4discovery/src/stm32f4discovery.h
index 89048910bb..90803e20e7 100644
--- a/boards/arm/stm32/stm32f4discovery/src/stm32f4discovery.h
+++ b/boards/arm/stm32/stm32f4discovery/src/stm32f4discovery.h
@@ -289,6 +289,9 @@
 #define GPIO_ENC28J60_INTR  (GPIO_INPUT|GPIO_FLOAT|GPIO_EXTI|\
                              GPIO_OPENDRAIN|GPIO_PORTE|GPIO_PIN4)
 
+#define GPIO_CS_MFRC522      (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
+                            GPIO_OUTPUT_SET|GPIO_PORTE|GPIO_PIN3)
+
 /* Use same pins as ENC28J60 to W5500 */
 
 #define GPIO_W5500_CS      (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\