1 files changed, 71 insertions, 0 deletions
diff --git a/include/hw/gpio/nrf51_gpio.h b/include/hw/gpio/nrf51_gpio.h
new file mode 100644
index 0000000000..fcfa2bac17
--- /dev/null
+++ b/include/hw/gpio/nrf51_gpio.h
@@ -0,0 +1,71 @@
+/*
+ * nRF51 System-on-Chip general purpose input/output register definition
+ *
+ * QEMU interface:
+ * + sysbus MMIO regions 0: GPIO registers
+ * + Unnamed GPIO inputs 0-31: Set tri-state input level for GPIO pin.
+ *   Level -1: Externally Disconnected/Floating; Pull-up/down will be regarded
+ *   Level 0: Input externally driven LOW
+ *   Level 1: Input externally driven HIGH
+ * + Unnamed GPIO outputs 0-31:
+ *   Level -1: Disconnected/Floating
+ *   Level 0: Driven LOW
+ *   Level 1: Driven HIGH
+ *
+ * Accuracy of the peripheral model:
+ * + The nRF51 GPIO output driver supports two modes, standard and high-current
+ *   mode. These different drive modes are not modeled and handled the same.
+ * + Pin SENSEing is not modeled/implemented.
+ *
+ * Copyright 2018 Steffen Görtz <contrib@steffen-goertz.de>
+ *
+ * This code is licensed under the GPL version 2 or later.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+#ifndef NRF51_GPIO_H
+#define NRF51_GPIO_H
+
+#include "hw/sysbus.h"
+#include "qom/object.h"
+#define TYPE_NRF51_GPIO "nrf51_soc.gpio"
+OBJECT_DECLARE_SIMPLE_TYPE(NRF51GPIOState, NRF51_GPIO)
+
+#define NRF51_GPIO_PINS 32
+
+#define NRF51_GPIO_SIZE 0x1000
+
+#define NRF51_GPIO_REG_OUT          0x504
+#define NRF51_GPIO_REG_OUTSET       0x508
+#define NRF51_GPIO_REG_OUTCLR       0x50C
+#define NRF51_GPIO_REG_IN           0x510
+#define NRF51_GPIO_REG_DIR          0x514
+#define NRF51_GPIO_REG_DIRSET       0x518
+#define NRF51_GPIO_REG_DIRCLR       0x51C
+#define NRF51_GPIO_REG_CNF_START    0x700
+#define NRF51_GPIO_REG_CNF_END      0x77C
+
+#define NRF51_GPIO_PULLDOWN 1
+#define NRF51_GPIO_PULLUP 3
+
+struct NRF51GPIOState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion mmio;
+    qemu_irq irq;
+
+    uint32_t out;
+    uint32_t in;
+    uint32_t in_mask;
+    uint32_t dir;
+    uint32_t cnf[NRF51_GPIO_PINS];
+
+    uint32_t old_out;
+    uint32_t old_out_connected;
+
+    qemu_irq output[NRF51_GPIO_PINS];
+    qemu_irq detect;
+};
+
+
+#endif