RASCSI/cpp/hal/sunxi_utils.h

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//---------------------------------------------------------------------------
//
// SCSI Target Emulator PiSCSI
// for Raspberry Pi
//
// Copyright (C) 2022 akuker
//
// [ Utility functions for working with Allwinner CPUs ]
//
// This should include generic functions that can be applicable to
// different variants of the SunXI (Allwinner) SoCs
//
// Large portions of this functionality were derived from c_gpio.c, which
// is part of the RPI.GPIO library available here:
// https://github.com/BPI-SINOVOIP/RPi.GPIO/blob/master/source/c_gpio.c
//
// 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.
//
//---------------------------------------------------------------------------
#pragma once
#include <cstdint>
#ifndef __arm__
#include <time.h>
#endif
class SunXI
{
public:
static inline int GPIO_BANK(int pin)
{
return (pin >> 5);
}
static inline int GPIO_NUM(int pin)
{
return (pin & 0x1F);
}
static inline int GPIO_CFG_INDEX(int pin)
{
return ((pin & 0x1F) >> 3);
}
static inline int GPIO_CFG_OFFSET(int pin)
{
return (((pin & 0x1F) & 0x7) << 2);
}
static inline int GPIO_PUL_INDEX(int pin)
{
return ((pin & 0x1F) >> 4);
}
static inline int GPIO_PUL_OFFSET(int pin)
{
return ((pin & 0x0F) << 1);
}
static inline int GPIO_DRV_INDEX(int pin)
{
return ((pin & 0x1F) >> 4);
}
static inline int GPIO_DRV_OFFSET(int pin)
{
return ((pin & 0x0F) << 1);
}
static inline void short_wait(void)
{
for (int i = 0; i < 150; i++) {
#ifndef __arm__
// Timing doesn't really matter if we're not on ARM.
// The SunXI SoCs are all ARM-based.
const timespec ts = {.tv_sec = 0, .tv_nsec = 1};
nanosleep(&ts, nullptr);
#else
// wait 150 cycles
asm volatile("nop");
#endif
}
}
enum class gpio_configure_values_e : uint8_t {
gpio_input = 0b000,
gpio_output = 0b001,
gpio_alt_func_1 = 0b010,
gpio_alt_func_2 = 0b011,
gpio_reserved_1 = 0b100,
gpio_reserved_2 = 0b101,
gpio_interupt = 0b110,
gpio_disable = 0b111
};
struct sunxi_gpio {
unsigned int CFG[4]; // NOSONAR: Intentionally using C style arrays for low level register access
unsigned int DAT;
unsigned int DRV[2]; // NOSONAR: Intentionally using C style arrays for low level register access
unsigned int PULL[2]; // NOSONAR: Intentionally using C style arrays for low level register access
};
using sunxi_gpio_t = struct sunxi_gpio;
/* gpio interrupt control */
struct sunxi_gpio_int {
unsigned int CFG[3]; // NOSONAR: Intentionally using C style arrays for low level register access
unsigned int CTL;
unsigned int STA;
unsigned int DEB;
};
using sunxi_gpio_int_t = struct sunxi_gpio_int;
struct sunxi_gpio_reg {
struct sunxi_gpio gpio_bank[9]; // NOSONAR: Intentionally using C style arrays for low level register access
unsigned char res[0xbc]; // NOSONAR: Intentionally using C style arrays for low level register access
struct sunxi_gpio_int gpio_int;
};
using sunxi_gpio_reg_t = struct sunxi_gpio_reg;
static const uint32_t PAGE_SIZE = (4 * 1024);
static const uint32_t BLOCK_SIZE = (4 * 1024);
static const int SETUP_DEVMEM_FAIL = 1;
static const int SETUP_MALLOC_FAIL = 2;
static const int SETUP_MMAP_FAIL = 3;
static const int SETUP_CPUINFO_FAIL = 4;
static const int SETUP_NOT_RPI_FAIL = 5;
static const int INPUT = 1;
static const int OUTPUT = 0;
static const int ALT0 = 4;
static const int HIGH = 1;
static const int LOW = 0;
static const int PUD_OFF = 0;
static const int PUD_DOWN = 1;
static const int PUD_UP = 2;
static const uint32_t SUNXI_R_GPIO_BASE = 0x01F02000;
static const uint32_t SUNXI_R_GPIO_REG_OFFSET = 0xC00;
static const uint32_t SUNXI_GPIO_BASE = 0x01C20000;
static const uint32_t SUNXI_GPIO_REG_OFFSET = 0x800;
static const uint32_t SUNXI_CFG_OFFSET = 0x00;
static const uint32_t SUNXI_DATA_OFFSET = 0x10;
static const uint32_t SUNXI_PUD_OFFSET = 0x1C;
static const uint32_t SUNXI_BANK_SIZE = 0x24;
static const uint32_t MAP_SIZE = (4096 * 2);
static const uint32_t MAP_MASK = (MAP_SIZE - 1);
static const int FSEL_OFFSET = 0; // 0x0000
static const int SET_OFFSET = 7; // 0x001c / 4
static const int CLR_OFFSET = 10; // 0x0028 / 4
static const int PINLEVEL_OFFSET = 13; // 0x0034 / 4
static const int EVENT_DETECT_OFFSET = 16; // 0x0040 / 4
static const int RISING_ED_OFFSET = 19; // 0x004c / 4
static const int FALLING_ED_OFFSET = 22; // 0x0058 / 4
static const int HIGH_DETECT_OFFSET = 25; // 0x0064 / 4
static const int LOW_DETECT_OFFSET = 28; // 0x0070 / 4
static const int PULLUPDN_OFFSET = 37; // 0x0094 / 4
static const int PULLUPDNCLK_OFFSET = 38; // 0x0098 / 4
static const uint32_t TMR_REGISTER_BASE = 0x01C20C00;
static const uint32_t TMR_IRQ_EN_REG = 0x0; // T imer IRQ Enable Register
static const uint32_t TMR_IRQ_STA_REG = 0x4; // Timer Status Register
static const uint32_t TMR0_CTRL_REG = 0x10; // Timer 0 Control Register
static const uint32_t TMR0_INTV_VALUE_REG = 0x14; // Timer 0 Interval Value Register
static const uint32_t TMR0_CUR_VALUE_REG = 0x18; // Timer 0 Current Value Register
static const uint32_t TMR1_CTRL_REG = 0x20; // Timer 1 Control Register
static const uint32_t TMR1_INTV_VALUE_REG = 0x24; // Timer 1 Interval Value Register
static const uint32_t TMR1_CUR_VALUE_REG = 0x28; // Timer 1 Current Value Register
static const uint32_t AVS_CNT_CTL_REG = 0x80; // AVS Control Register
static const uint32_t AVS_CNT0_REG = 0x84; // AVS Counter 0 Register
static const uint32_t AVS_CNT1_REG = 0x88; // AVS Counter 1 Register
static const uint32_t AVS_CNT_DIV_REG = 0x8C; // AVS Divisor Register
static const uint32_t WDOG0_IRQ_EN_REG = 0xA0; // Watchdog 0 IRQ Enable Register
static const uint32_t WDOG0_IRQ_STA_REG = 0xA4; // Watchdog 0 Status Register
static const uint32_t WDOG0_CTRL_REG = 0xB0; // Watchdog 0 Control Register
static const uint32_t WDOG0_CFG_REG = 0xB4; // Watchdog 0 Configuration Register
static const uint32_t WDOG0_MODE_REG = 0xB8; // Watchdog 0 Mode Register
};