From 6820e4dcdc11df4419f82e25435406bbb5f1f6df Mon Sep 17 00:00:00 2001
From: Drashna Jael're <drashna@live.com>
Date: Tue, 12 Nov 2024 19:21:20 -0800
Subject: [PATCH] Enable wear leveling spi flash eeprom for feather f405

---
 .../handwired/feather_stm32f405_express/config.h    | 13 +++++++++++++
 .../handwired/feather_stm32f405_express/halconf.h   |  5 +++++
 .../feather_stm32f405_express/keyboard.json         |  7 +++++++
 .../handwired/feather_stm32f405_express/mcuconf.h   | 12 ++++++++++++
 4 files changed, 37 insertions(+)

diff --git a/keyboards/handwired/feather_stm32f405_express/config.h b/keyboards/handwired/feather_stm32f405_express/config.h
index bdfb32ff60ea..3d3aed759319 100644
--- a/keyboards/handwired/feather_stm32f405_express/config.h
+++ b/keyboards/handwired/feather_stm32f405_express/config.h
@@ -12,3 +12,16 @@
 #define DRV2605L_FB_ERM_LRA   0
 #define DRV2605L_GREETING     DRV2605L_EFFECT_750_MS_ALERT_100
 #define DRV2605L_DEFAULT_MODE DRV2605L_EFFECT_BUZZ_1_100
+
+/* spi config for eeprom and pmw3360 sensor */
+#define SPI_DRIVER        SPID1
+#define SPI_SCK_PIN       B3
+#define SPI_SCK_PAL_MODE  5
+#define SPI_MOSI_PIN      B5
+#define SPI_MOSI_PAL_MODE 5
+#define SPI_MISO_PIN      B4
+#define SPI_MISO_PAL_MODE 5
+
+#define EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN A15
+#define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR    32 // 16 or less doesn't work right
+#define EXTERNAL_FLASH_SIZE                 (2 * 1024 * 1024)
diff --git a/keyboards/handwired/feather_stm32f405_express/halconf.h b/keyboards/handwired/feather_stm32f405_express/halconf.h
index 6c46c850f704..c0e8e5e4b689 100644
--- a/keyboards/handwired/feather_stm32f405_express/halconf.h
+++ b/keyboards/handwired/feather_stm32f405_express/halconf.h
@@ -19,4 +19,9 @@
 
 #define HAL_USE_I2C TRUE
 
+#if HAL_USE_SPI == TRUE
+#    define SPI_USE_WAIT TRUE
+#    define SPI_SELECT_MODE SPI_SELECT_MODE_PAD
+#endif
+
 #include_next <halconf.h>
diff --git a/keyboards/handwired/feather_stm32f405_express/keyboard.json b/keyboards/handwired/feather_stm32f405_express/keyboard.json
index 952395e26c49..adfaf96b6cd4 100644
--- a/keyboards/handwired/feather_stm32f405_express/keyboard.json
+++ b/keyboards/handwired/feather_stm32f405_express/keyboard.json
@@ -17,6 +17,13 @@
     "haptic": {
         "driver": "drv2605l"
     },
+    "eeprom": {
+        "wear_leveling": {
+            "driver": "spi_flash",
+            "logical_size": 16384,
+            "backing_size": 65536
+        }
+    },
     "matrix_pins": {
         "cols": [null, null, null, null],
         "rows": [null, null, null, null]
diff --git a/keyboards/handwired/feather_stm32f405_express/mcuconf.h b/keyboards/handwired/feather_stm32f405_express/mcuconf.h
index 87291c61a5ef..1db61cdc4d07 100644
--- a/keyboards/handwired/feather_stm32f405_express/mcuconf.h
+++ b/keyboards/handwired/feather_stm32f405_express/mcuconf.h
@@ -20,3 +20,15 @@
 
 #undef STM32_I2C_USE_I2C1
 #define STM32_I2C_USE_I2C1 TRUE
+
+
+#if HAL_USE_SPI == TRUE
+#    undef STM32_SPI_USE_SPI1
+#    define STM32_SPI_USE_SPI1 TRUE
+
+#    undef STM32_SPI_SPI1_TX_DMA_STREAM
+#    define STM32_SPI_SPI1_TX_DMA_STREAM STM32_DMA_STREAM_ID(2, 5)
+#    undef STM32_SPI_SPI1_RX_DMA_STREAM
+#    define STM32_SPI_SPI1_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 0)
+
+#endif