stm32f2xx_USART: Add the stm32f2xx USART Controller

This patch adds the stm32f2xx USART controller
(UART also uses the same controller).

Signed-off-by: Alistair Francis <alistair@alistair23.me>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 762c6c0d2a41d574932bc4445ec9bfffe6da8798.1424175342.git.alistair@alistair23.me
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/include/hw/char/stm32f2xx_usart.h b/include/hw/char/stm32f2xx_usart.h
new file mode 100644
index 0000000..b97f192
--- /dev/null
+++ b/include/hw/char/stm32f2xx_usart.h
@@ -0,0 +1,73 @@
+/*
+ * STM32F2XX USART
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_STM32F2XX_USART_H
+#define HW_STM32F2XX_USART_H
+
+#include "hw/sysbus.h"
+#include "sysemu/char.h"
+#include "hw/hw.h"
+
+#define USART_SR   0x00
+#define USART_DR   0x04
+#define USART_BRR  0x08
+#define USART_CR1  0x0C
+#define USART_CR2  0x10
+#define USART_CR3  0x14
+#define USART_GTPR 0x18
+
+#define USART_SR_RESET 0x00C00000
+
+#define USART_SR_TXE  (1 << 7)
+#define USART_SR_TC   (1 << 6)
+#define USART_SR_RXNE (1 << 5)
+
+#define USART_CR1_UE  (1 << 13)
+#define USART_CR1_RXNEIE  (1 << 5)
+#define USART_CR1_TE  (1 << 3)
+#define USART_CR1_RE  (1 << 2)
+
+#define TYPE_STM32F2XX_USART "stm32f2xx-usart"
+#define STM32F2XX_USART(obj) \
+    OBJECT_CHECK(STM32F2XXUsartState, (obj), TYPE_STM32F2XX_USART)
+
+typedef struct {
+    /* <private> */
+    SysBusDevice parent_obj;
+
+    /* <public> */
+    MemoryRegion mmio;
+
+    uint32_t usart_sr;
+    uint32_t usart_dr;
+    uint32_t usart_brr;
+    uint32_t usart_cr1;
+    uint32_t usart_cr2;
+    uint32_t usart_cr3;
+    uint32_t usart_gtpr;
+
+    CharDriverState *chr;
+    qemu_irq irq;
+} STM32F2XXUsartState;
+#endif /* HW_STM32F2XX_USART_H */