1 files changed, 78 insertions, 0 deletions
diff --git a/include/hw/char/max78000_uart.h b/include/hw/char/max78000_uart.h
new file mode 100644
index 0000000..cf90d51
--- /dev/null
+++ b/include/hw/char/max78000_uart.h
@@ -0,0 +1,78 @@
+/*
+ * MAX78000 UART
+ *
+ * Copyright (c) 2025 Jackson Donaldson <jcksn@duck.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_MAX78000_UART_H
+#define HW_MAX78000_UART_H
+
+#include "hw/sysbus.h"
+#include "chardev/char-fe.h"
+#include "qemu/fifo8.h"
+#include "qom/object.h"
+
+#define UART_CTRL       0x0
+#define UART_STATUS     0x4
+#define UART_INT_EN     0x8
+#define UART_INT_FL     0xc
+#define UART_CLKDIV     0x10
+#define UART_OSR        0x14
+#define UART_TXPEEK     0x18
+#define UART_PNR        0x1c
+#define UART_FIFO       0x20
+#define UART_DMA        0x30
+#define UART_WKEN       0x34
+#define UART_WKFL       0x38
+
+/* CTRL */
+#define UART_CTF_DIS    (1 << 7)
+#define UART_FLUSH_TX   (1 << 8)
+#define UART_FLUSH_RX   (1 << 9)
+#define UART_BCLKEN     (1 << 15)
+#define UART_BCLKRDY    (1 << 19)
+
+/* STATUS */
+#define UART_RX_LVL     8
+#define UART_TX_EM      (1 << 6)
+#define UART_RX_FULL    (1 << 5)
+#define UART_RX_EM      (1 << 4)
+
+/* PNR (Pin Control Register) */
+#define UART_CTS        1
+#define UART_RTS        (1 << 1)
+
+/* INT_EN / INT_FL */
+#define UART_RX_THD     (1 << 4)
+#define UART_TX_HE      (1 << 6)
+
+#define UART_RXBUFLEN   0x100
+#define TYPE_MAX78000_UART "max78000-uart"
+OBJECT_DECLARE_SIMPLE_TYPE(Max78000UartState, MAX78000_UART)
+
+struct Max78000UartState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion mmio;
+
+    uint32_t ctrl;
+    uint32_t status;
+    uint32_t int_en;
+    uint32_t int_fl;
+    uint32_t clkdiv;
+    uint32_t osr;
+    uint32_t txpeek;
+    uint32_t pnr;
+    uint32_t fifo;
+    uint32_t dma;
+    uint32_t wken;
+    uint32_t wkfl;
+
+    Fifo8 rx_fifo;
+
+    CharBackend chr;
+    qemu_irq irq;
+};
+#endif /* HW_STM32F2XX_USART_H */