From 446eb86b3c51095a9e13f0d7a633bcc819b156cc Mon Sep 17 00:00:00 2001
From: Karl Palsson <karlp@tweak.net.au>
Date: Thu, 6 Jan 2022 23:33:46 +0000
Subject: stm32wb: exti: initial registers

Basic registers to start with, a lot of commonality, but extra registers
on the WB.

Signed-off-by <karlp@tweak.net.au>
---
 .gitignore              |  1 +
 SConscript              |  1 +
 exti/SConscript         | 21 +++++++++++++++++++++
 exti/stm32_exti.h       | 33 +++++++++++++++++++++++++++++++++
 platforms/stm32/wb.yaml |  5 +++++
 5 files changed, 61 insertions(+)
 create mode 100644 exti/SConscript
 create mode 100644 exti/stm32_exti.h

diff --git a/.gitignore b/.gitignore
index 42cb9aa..8db6560 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ docs
 # Generated source files:
 ld_scripts/generated.ld
 dma/dma.h
+exti/exti.h
 gpio/gpio.h
 interrupt/interrupt.h
 interrupt/interrupt_enums.h
diff --git a/SConscript b/SConscript
index ab20f19..1d228cb 100644
--- a/SConscript
+++ b/SConscript
@@ -8,6 +8,7 @@ env.SConscript('ld_scripts/SConscript')
 env.Append(
 	LIB_SOURCES = [
 		env.SConscript('dma/SConscript'),
+		env.SConscript('exti/SConscript'),
 		env.SConscript('gpio/SConscript'),
 		env.SConscript('interrupt/SConscript'),
 		env.SConscript('pwr/SConscript'),
diff --git a/exti/SConscript b/exti/SConscript
new file mode 100644
index 0000000..b620818
--- /dev/null
+++ b/exti/SConscript
@@ -0,0 +1,21 @@
+Import('env')
+
+headers = []
+instances = []
+sources = []
+aliases = {}
+
+periph = env['PLATFORM_SPEC'].get('periph', {})
+
+if 'stm32_exti' in periph:
+    headers.append('stm32_exti.h')
+    for name, data in periph['stm32_exti'].items():
+        instances.append({
+            'type': 'STM32_EXTI_t<STM32_EXTI_reg_%s_t>' % data['type'],
+            'name': name,
+            'args': [data['offset']],
+        })
+
+env.Jinja2('exti.h', '../templates/periph_instances.h.j2', headers = headers, instances = instances, aliases = aliases)
+
+Return('sources')
diff --git a/exti/stm32_exti.h b/exti/stm32_exti.h
new file mode 100644
index 0000000..525a483
--- /dev/null
+++ b/exti/stm32_exti.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <mmio/mmio.h>
+
+struct STM32_EXTI_reg_wb_t {
+	volatile uint32_t RTSR1;
+	volatile uint32_t FTSR1;
+	volatile uint32_t SWIER1;
+	volatile uint32_t PR1;
+	uint32_t _reserved1[4];
+	volatile uint32_t RTSR2;
+	volatile uint32_t FTSR2;
+	volatile uint32_t SWIER2;
+	volatile uint32_t PR2;
+	uint32_t _reserved2[20];
+	volatile uint32_t IMR1;
+	volatile uint32_t EMR1;
+	uint32_t _reserved3[2];
+	volatile uint32_t IMR2;
+	volatile uint32_t EMR2;
+	uint32_t _reserved4[10];
+	volatile uint32_t C2IMR1;
+	volatile uint32_t C2EMR1;
+	uint32_t _reserved5[2];
+	volatile uint32_t C2IMR2;
+	volatile uint32_t C2EMR2;
+};
+
+template <typename T>
+class STM32_EXTI_t : public mmio_ptr<T> {
+    public:
+        using mmio_ptr<T>::ptr;
+};
diff --git a/platforms/stm32/wb.yaml b/platforms/stm32/wb.yaml
index 314b729..5fdb127 100644
--- a/platforms/stm32/wb.yaml
+++ b/platforms/stm32/wb.yaml
@@ -41,6 +41,11 @@
         type: v1
         offset: 0x40020800
 
+    stm32_exti:
+      EXTI:
+        type: wb
+        offset: 0x58000800
+
     stm32_flash:
       FLASH:
         type: wb
-- 
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