LXR qemu/include/hw/gpio/nrf51

   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/sysbus.h"
  30#define TYPE_NRF51_GPIO "nrf51_soc.gpio"
  31#define NRF51_GPIO(obj) OBJECT_CHECK(NRF51GPIOState, (obj), TYPE_NRF51_GPIO)
  32
  33#define NRF51_GPIO_PINS 32
  34
  35#define NRF51_GPIO_SIZE 0x1000
  36
  37#define NRF51_GPIO_REG_OUT          0x504
  38#define NRF51_GPIO_REG_OUTSET       0x508
  39#define NRF51_GPIO_REG_OUTCLR       0x50C
  40#define NRF51_GPIO_REG_IN           0x510
  41#define NRF51_GPIO_REG_DIR          0x514
  42#define NRF51_GPIO_REG_DIRSET       0x518
  43#define NRF51_GPIO_REG_DIRCLR       0x51C
  44#define NRF51_GPIO_REG_CNF_START    0x700
  45#define NRF51_GPIO_REG_CNF_END      0x77C
  46
  47#define NRF51_GPIO_PULLDOWN 1
  48#define NRF51_GPIO_PULLUP 3
  49
  50typedef struct NRF51GPIOState {
  51    SysBusDevice parent_obj;
  52
  53    MemoryRegion mmio;
  54    qemu_irq irq;
  55
  56    uint32_t out;
  57    uint32_t in;
  58    uint32_t in_mask;
  59    uint32_t dir;
  60    uint32_t cnf[NRF51_GPIO_PINS];
  61
  62    uint32_t old_out;
  63    uint32_t old_out_connected;
  64
  65    qemu_irq output[NRF51_GPIO_PINS];
  66} NRF51GPIOState;
  67
  68
  69#endif
  70