From 9801227da93abb418d12804d2ceb56ce04d90c1d Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Wed, 15 Sep 2021 17:05:36 +0200
Subject: uart: Generate instances from platform spec.

---
 SConscript              |  1 +
 platforms/stm32/f4.yaml |  4 +++-
 uart/SConscript         | 21 ++++++++++++++++++
 uart/stm32_uart.h       | 33 ++++++++++++++++++++++++++++
 uart/uart.h             | 12 ++++++++++
 usart/usart.h           | 58 -------------------------------------------------
 6 files changed, 70 insertions(+), 59 deletions(-)
 create mode 100644 uart/SConscript
 create mode 100644 uart/stm32_uart.h
 create mode 100644 uart/uart.h
 delete mode 100644 usart/usart.h

diff --git a/SConscript b/SConscript
index 26a0bda..f9d4021 100644
--- a/SConscript
+++ b/SConscript
@@ -9,6 +9,7 @@ env.Append(
 	LIB_SOURCES = [
 		env.SConscript('interrupt/SConscript'),
 		env.SConscript('rcc/SConscript'),
+		env.SConscript('uart/SConscript'),
 		env.SConscript('usb/SConscript'),
 		Glob('startup/*.cpp'),
 		Glob('i2c/*.cpp'),
diff --git a/platforms/stm32/f4.yaml b/platforms/stm32/f4.yaml
index dc5717d..5325d92 100644
--- a/platforms/stm32/f4.yaml
+++ b/platforms/stm32/f4.yaml
@@ -22,11 +22,13 @@
       size: 64k
 
   periph:
-    uart_stm32:
+    stm32_uart:
       USART1:
         offset: 0x40011000
+        type: v1
       USART2:
         offset: 0x40004400
+        type: v1
 
     dwc_otg:
       OTG_FS:
diff --git a/uart/SConscript b/uart/SConscript
new file mode 100644
index 0000000..dcf6d3e
--- /dev/null
+++ b/uart/SConscript
@@ -0,0 +1,21 @@
+Import('env')
+
+headers = []
+instances = []
+sources = []
+aliases = {}
+
+periph = env['PLATFORM_SPEC'].get('periph', {})
+
+if 'stm32_uart' in periph:
+    headers.append('stm32_uart.h')
+    for name, data in periph['stm32_uart'].items():
+        instances.append({
+            'type': 'STM32_UART_t<STM32_UART_reg_%s_t>' % data['type'],
+            'name': name,
+            'args': [data['offset']],
+        })
+
+env.Jinja2('uart.h', '../templates/periph_instances.h.j2', headers = headers, instances = instances, aliases = aliases)
+
+Return('sources')
diff --git a/uart/stm32_uart.h b/uart/stm32_uart.h
new file mode 100644
index 0000000..e4902a5
--- /dev/null
+++ b/uart/stm32_uart.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <mmio/mmio.h>
+
+struct STM32_UART_reg_v1_t {
+	volatile uint32_t SR;
+	volatile uint32_t DR;
+	volatile uint32_t BRR;
+	volatile uint32_t CR1;
+	volatile uint32_t CR2;
+	volatile uint32_t CR3;
+	volatile uint32_t GTPR;
+};
+
+struct STM32_UART_reg_v2_t {
+	volatile uint32_t CR1;
+	volatile uint32_t CR2;
+	volatile uint32_t CR3;
+	volatile uint32_t BRR;
+	volatile uint32_t GTPR;
+	volatile uint32_t RTOR;
+	volatile uint32_t RQR;
+	volatile uint32_t ISR;
+	volatile uint32_t ICR;
+	volatile uint32_t RDR;
+	volatile uint32_t TDR;
+};
+
+template <typename T>
+class STM32_UART_t : public mmio_ptr<T> {
+    public:
+        using mmio_ptr<T>::ptr;
+};
diff --git a/uart/uart.h b/uart/uart.h
new file mode 100644
index 0000000..ed680ea
--- /dev/null
+++ b/uart/uart.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "stm32_uart.h"
+
+constexpr STM32_UART_t<STM32_UART_reg_v1_t> USART1{
+        0x40011000,
+};
+constexpr STM32_UART_t<STM32_UART_reg_v1_t> USART2{
+        0x40004400,
+};
+
+
diff --git a/usart/usart.h b/usart/usart.h
deleted file mode 100644
index 9f3d838..0000000
--- a/usart/usart.h
+++ /dev/null
@@ -1,58 +0,0 @@
-#ifndef USART_H
-#define USART_H
-
-#include <rcc/rcc.h>
-#include <interrupt/interrupt.h>
-
-#if defined(STM32F1) || defined(STM32F4)
-struct USART_reg_t {
-	volatile uint32_t SR;
-	volatile uint32_t DR;
-	volatile uint32_t BRR;
-	volatile uint32_t CR1;
-	volatile uint32_t CR2;
-	volatile uint32_t CR3;
-	volatile uint32_t GTPR;
-};
-#elif defined(STM32F3) || defined(STM32L0)
-struct USART_reg_t {
-	volatile uint32_t CR1;
-	volatile uint32_t CR2;
-	volatile uint32_t CR3;
-	volatile uint32_t BRR;
-	volatile uint32_t GTPR;
-	volatile uint32_t RTOR;
-	volatile uint32_t RQR;
-	volatile uint32_t ISR;
-	volatile uint32_t ICR;
-	volatile uint32_t RDR;
-	volatile uint32_t TDR;
-};
-#endif
-
-class USART_t {
-	public:
-		USART_reg_t& reg;
-		const uint32_t clk;
-		
-		USART_t(uint32_t reg_addr, uint32_t bus_clk) : reg(*(USART_reg_t*)reg_addr), clk(bus_clk) {}
-		
-		inline void set_baudrate(uint32_t baudrate) {
-			reg.BRR = clk / baudrate;
-		}
-};
-
-#if defined(STM32F1) || defined(STM32F3)
-static USART_t USART1(0x40013800, 72000000);
-static USART_t USART2(0x40004400, 36000000);
-static USART_t USART3(0x40004800, 36000000);
-#elif defined(STM32F4)
-static USART_t USART1(0x40011000, 84000000);
-static USART_t USART2(0x40004400, 42000000);
-static USART_t USART3(0x40004800, 42000000);
-#elif defined(STM32L0)
-static USART_t USART1(0x40013800, 32000000);
-static USART_t USART2(0x40004400, 32000000);
-#endif
-
-#endif
-- 
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