| 1 | /* |
| 2 | * nRF51 System-on-Chip general purpose input/output register definition |
| 3 | * |
| 4 | * QEMU interface: |
| 5 | * + sysbus MMIO regions 0: GPIO registers |
| 6 | * + Unnamed GPIO inputs 0-31: Set tri-state input level for GPIO pin. |
| 7 | * Level -1: Externally Disconnected/Floating; Pull-up/down will be regarded |
| 8 | * Level 0: Input externally driven LOW |
| 9 | * Level 1: Input externally driven HIGH |
| 10 | * + Unnamed GPIO outputs 0-31: |
| 11 | * Level -1: Disconnected/Floating |
| 12 | * Level 0: Driven LOW |
| 13 | * Level 1: Driven HIGH |
| 14 | * |
| 15 | * Accuracy of the peripheral model: |
| 16 | * + The nRF51 GPIO output driver supports two modes, standard and high-current |
| 17 | * mode. These different drive modes are not modeled and handled the same. |
| 18 | * + Pin SENSEing is not modeled/implemented. |
| 19 | * |
| 20 | * Copyright 2018 Steffen Görtz <contrib@steffen-goertz.de> |
| 21 | * |
| 22 | * This code is licensed under the GPL version 2 or later. See |
| 23 | * the COPYING file in the top-level directory. |
| 24 | * |
| 25 | */ |
| 26 | #ifndef NRF51_GPIO_H |
| 27 | #define NRF51_GPIO_H |
| 28 | |
| 29 | #include "hw/core/sysbus.h" |
| 30 | #include "qom/object.h" |
| 31 | #define TYPE_NRF51_GPIO "nrf51_soc.gpio" |
| 32 | OBJECT_DECLARE_SIMPLE_TYPE(NRF51GPIOState, NRF51_GPIO) |
| 33 | |
| 34 | #define NRF51_GPIO_PINS 32 |
| 35 | |
| 36 | #define NRF51_GPIO_SIZE 0x1000 |
| 37 | |
| 38 | #define NRF51_GPIO_REG_OUT 0x504 |
| 39 | #define NRF51_GPIO_REG_OUTSET 0x508 |
| 40 | #define NRF51_GPIO_REG_OUTCLR 0x50C |
| 41 | #define NRF51_GPIO_REG_IN 0x510 |
| 42 | #define NRF51_GPIO_REG_DIR 0x514 |
| 43 | #define NRF51_GPIO_REG_DIRSET 0x518 |
| 44 | #define NRF51_GPIO_REG_DIRCLR 0x51C |
| 45 | #define NRF51_GPIO_REG_CNF_START 0x700 |
| 46 | #define NRF51_GPIO_REG_CNF_END 0x77C |
| 47 | |
| 48 | #define NRF51_GPIO_PULLDOWN 1 |
| 49 | #define NRF51_GPIO_PULLUP 3 |
| 50 | |
| 51 | struct NRF51GPIOState { |
| 52 | SysBusDevice parent_obj; |
| 53 | |
| 54 | MemoryRegion mmio; |
| 55 | qemu_irq irq; |
| 56 | |
| 57 | uint32_t out; |
| 58 | uint32_t in; |
| 59 | uint32_t in_mask; |
| 60 | uint32_t dir; |
| 61 | uint32_t cnf[NRF51_GPIO_PINS]; |
| 62 | |
| 63 | uint32_t old_out; |
| 64 | uint32_t old_out_connected; |
| 65 | |
| 66 | qemu_irq output[NRF51_GPIO_PINS]; |
| 67 | qemu_irq detect; |
| 68 | }; |
| 69 | |
| 70 | |
| 71 | #endif |