From 97398d900caaccbf1b6cc53a80581b69687757e7 Mon Sep 17 00:00:00 2001
From: Andrew Baumann
Date: Wed, 16 Mar 2016 17:06:01 +0000
Subject: bcm2835_aux: add emulation of BCM2835 AUX (aka UART1) block

At present only the core UART functions (data path for tx/rx) are
implemented, which is enough for UEFI to boot. The following
features/registers are unimplemented:
  * Line/modem control
  * Scratch register
  * Extra control
  * Baudrate
  * SPI interfaces

Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1457467526-8840-3-git-send-email-Andrew.Baumann@microsoft.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/arm/bcm2835_peripherals.h |  2 ++
 include/hw/char/bcm2835_aux.h        | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 include/hw/char/bcm2835_aux.h

(limited to 'include')

diff --git a/include/hw/arm/bcm2835_peripherals.h b/include/hw/arm/bcm2835_peripherals.h
index 5d888dca53..889adf56b3 100644
--- a/include/hw/arm/bcm2835_peripherals.h
+++ b/include/hw/arm/bcm2835_peripherals.h
@@ -14,6 +14,7 @@
 #include "qemu-common.h"
 #include "exec/address-spaces.h"
 #include "hw/sysbus.h"
+#include "hw/char/bcm2835_aux.h"
 #include "hw/intc/bcm2835_ic.h"
 #include "hw/misc/bcm2835_property.h"
 #include "hw/misc/bcm2835_mbox.h"
@@ -33,6 +34,7 @@ typedef struct BCM2835PeripheralState {
     qemu_irq irq, fiq;
 
     SysBusDevice *uart0;
+    BCM2835AuxState aux;
     BCM2835ICState ic;
     BCM2835PropertyState property;
     BCM2835MboxState mboxes;
diff --git a/include/hw/char/bcm2835_aux.h b/include/hw/char/bcm2835_aux.h
new file mode 100644
index 0000000000..42f0ee7a92
--- /dev/null
+++ b/include/hw/char/bcm2835_aux.h
@@ -0,0 +1,33 @@
+/*
+ * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft
+ * Written by Andrew Baumann
+ *
+ * This code is licensed under the GNU GPLv2 and later.
+ */
+
+#ifndef BCM2835_AUX_H
+#define BCM2835_AUX_H
+
+#include "hw/sysbus.h"
+#include "sysemu/char.h"
+
+#define TYPE_BCM2835_AUX "bcm2835-aux"
+#define BCM2835_AUX(obj) OBJECT_CHECK(BCM2835AuxState, (obj), TYPE_BCM2835_AUX)
+
+#define BCM2835_AUX_RX_FIFO_LEN 8
+
+typedef struct {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    MemoryRegion iomem;
+    CharDriverState *chr;
+    qemu_irq irq;
+
+    uint8_t read_fifo[BCM2835_AUX_RX_FIFO_LEN];
+    uint8_t read_pos, read_count;
+    uint8_t ier, iir;
+} BCM2835AuxState;
+
+#endif
-- 
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