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RASCSI/cpp/hal/sbc_version.cpp

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//---------------------------------------------------------------------------
//
// SCSI Target Emulator PiSCSI
// for Raspberry Pi
//
// Copyright (C) 2022 akuker
//
// [ Hardware version detection routines ]
//
//---------------------------------------------------------------------------
#include "sbc_version.h"
#include "shared/log.h"
#include <fstream>
#include <iostream>
#include <sstream>
SBC_Version::sbc_version_type SBC_Version::m_sbc_version = sbc_version_type::sbc_unknown;
// TODO: THESE NEED TO BE VALIDATED!!!!
const std::string SBC_Version::m_str_raspberry_pi_1 = "Raspberry Pi 1";
const std::string SBC_Version::m_str_raspberry_pi_2_3 = "Raspberry Pi 2/3";
const std::string SBC_Version::m_str_raspberry_pi_4 = "Raspberry Pi 4";
const std::string SBC_Version::m_str_bananapi_m1_plus = "Banana Pi M1 Plus";
const std::string SBC_Version::m_str_bananapi_m2_berry = "Banana Pi M2 Berry/Ultra";
const std::string SBC_Version::m_str_bananapi_m2_zero = "Banana Pi M2 Zero";
const std::string SBC_Version::m_str_bananapi_m2_plus = "Banana Pi BPI-M2-Plus H3";
const std::string SBC_Version::m_str_bananapi_m3 = "Banana Pi M3";
const std::string SBC_Version::m_str_bananapi_m4 = "Banana Pi M4";
const std::string SBC_Version::m_str_bananapi_m5 = "Banana Pi M5";
const std::string SBC_Version::m_str_bananapi_m64 = "Banana Pi M64";
const std::string SBC_Version::m_str_unknown_sbc = "Unknown SBC";
// The strings in this table should align with the 'model' embedded
// in the device tree. This can be aquired by running:
// cat /proc/device-tree/model
// Only the first part of the string is checked. Anything following
// will be ignored. For example:
// "Raspberry Pi 4 Model B" will match with both of the following:
// - Raspberry Pi 4 Model B Rev 1.4
// - Raspberry Pi 4 Model B Rev 1.3
const std::map<std::string, SBC_Version::sbc_version_type, std::less<>> SBC_Version::m_proc_device_tree_mapping = {
{"Raspberry Pi 1 Model ", sbc_version_type::sbc_raspberry_pi_1},
{"Raspberry Pi 2 Model ", sbc_version_type::sbc_raspberry_pi_2_3},
{"Raspberry Pi 3 Model ", sbc_version_type::sbc_raspberry_pi_2_3},
{"Raspberry Pi 4 Model ", sbc_version_type::sbc_raspberry_pi_4},
{"Raspberry Pi 400 ", sbc_version_type::sbc_raspberry_pi_4},
{"Raspberry Pi Zero W", sbc_version_type::sbc_raspberry_pi_1},
{"Raspberry Pi Zero", sbc_version_type::sbc_raspberry_pi_1},
{"Banana Pi BPI-M2-Zero ", sbc_version_type::sbc_bananapi_m2_zero},
{"Banana Pi BPI-M2-Ultra ", sbc_version_type::sbc_bananapi_m2_berry},
{"Banana Pi BPI-M2-Plus H3", sbc_version_type::sbc_bananapi_m2_plus},
{"Banana Pi M2 Berry ", sbc_version_type::sbc_bananapi_m2_berry},
// sbc_bananapi_m3, TBD....
// sbc_bananapi_m4,
};
const std::string SBC_Version::m_device_tree_model_path = "/proc/device-tree/model";
//---------------------------------------------------------------------------
//
// Convert the SBC Version to a printable string
//
//---------------------------------------------------------------------------
const std::string *SBC_Version::GetString()
{
switch (m_sbc_version) {
case sbc_version_type::sbc_raspberry_pi_1:
return &m_str_raspberry_pi_1;
case sbc_version_type::sbc_raspberry_pi_2_3:
return &m_str_raspberry_pi_2_3;
case sbc_version_type::sbc_raspberry_pi_4:
return &m_str_raspberry_pi_4;
case sbc_version_type::sbc_bananapi_m2_berry:
return &m_str_bananapi_m2_berry;
case sbc_version_type::sbc_bananapi_m2_zero:
return &m_str_bananapi_m2_zero;
case sbc_version_type::sbc_bananapi_m2_plus:
return &m_str_bananapi_m2_plus;
case sbc_version_type::sbc_bananapi_m3:
return &m_str_bananapi_m3;
case sbc_version_type::sbc_bananapi_m4:
return &m_str_bananapi_m4;
default:
LOGERROR("Unknown type of sbc detected: %d", static_cast<int>(m_sbc_version))
return &m_str_unknown_sbc;
}
}
SBC_Version::sbc_version_type SBC_Version::GetSbcVersion()
{
return m_sbc_version;
}
//---------------------------------------------------------------------------
//
// Determine which version of single board computer (Pi) is being used
// based upon the device tree model string.
//
//---------------------------------------------------------------------------
void SBC_Version::Init()
{
LOGTRACE("%s", __PRETTY_FUNCTION__)
std::string device_tree_model;
const std::ifstream input_stream(SBC_Version::m_device_tree_model_path);
if (input_stream.fail()) {
#if defined(__x86_64__) || defined(__X86__)
// We expect this to fail on x86
LOGINFO("Detected device %s", GetString()->c_str())
m_sbc_version = sbc_version_type::sbc_unknown;
return;
#else
LOGERROR("Failed to open %s. Are you running as root?", SBC_Version::m_device_tree_model_path.c_str())
throw std::invalid_argument("Failed to open /proc/device-tree/model");
#endif
}
std::stringstream str_buffer;
str_buffer << input_stream.rdbuf();
device_tree_model = str_buffer.str();
for (const auto &[key, value] : m_proc_device_tree_mapping) {
if (device_tree_model.rfind(key, 0) == 0) {
m_sbc_version = value;
LOGINFO("Detected device %s", GetString()->c_str())
return;
}
}
LOGERROR("%s Unable to determine single board computer type. Defaulting to Raspberry Pi 4", __PRETTY_FUNCTION__)
m_sbc_version = sbc_version_type::sbc_raspberry_pi_4;
}
bool SBC_Version::IsRaspberryPi()
{
LOGTRACE("%s", __PRETTY_FUNCTION__)
switch (m_sbc_version) {
case sbc_version_type::sbc_raspberry_pi_1:
case sbc_version_type::sbc_raspberry_pi_2_3:
case sbc_version_type::sbc_raspberry_pi_4:
return true;
case sbc_version_type::sbc_bananapi_m2_berry:
case sbc_version_type::sbc_bananapi_m2_zero:
case sbc_version_type::sbc_bananapi_m2_plus:
case sbc_version_type::sbc_bananapi_m3:
case sbc_version_type::sbc_bananapi_m4:
return false;
default:
return false;
}
}
bool SBC_Version::IsBananaPi()
{
LOGTRACE("%s", __PRETTY_FUNCTION__)
switch (m_sbc_version) {
case sbc_version_type::sbc_raspberry_pi_1:
case sbc_version_type::sbc_raspberry_pi_2_3:
case sbc_version_type::sbc_raspberry_pi_4:
return false;
case sbc_version_type::sbc_bananapi_m2_berry:
case sbc_version_type::sbc_bananapi_m2_zero:
case sbc_version_type::sbc_bananapi_m2_plus:
case sbc_version_type::sbc_bananapi_m3:
case sbc_version_type::sbc_bananapi_m4:
return true;
default:
return false;
}
}
// The following functions are only used on the Raspberry Pi
// (imported from bcm_host.c)
uint32_t SBC_Version::GetDeviceTreeRanges(const char *filename, uint32_t offset)
{
LOGTRACE("%s", __PRETTY_FUNCTION__)
uint32_t address = ~0;
if (FILE *fp = fopen(filename, "rb"); fp) {
fseek(fp, offset, SEEK_SET);
if (std::array<uint8_t, 4> buf; fread(buf.data(), 1, buf.size(), fp) == buf.size()) {
address = (int)buf[0] << 24 | (int)buf[1] << 16 | (int)buf[2] << 8 | (int)buf[3] << 0;
}
fclose(fp);
}
return address;
}
#if defined __linux__
uint32_t SBC_Version::GetPeripheralAddress(void)
{
LOGTRACE("%s", __PRETTY_FUNCTION__)
uint32_t address = GetDeviceTreeRanges("/proc/device-tree/soc/ranges", 4);
if (address == 0) {
address = GetDeviceTreeRanges("/proc/device-tree/soc/ranges", 8);
}
address = (address == (uint32_t)~0) ? 0x20000000 : address;
LOGDEBUG("Peripheral address : 0x%8x\n", address)
return address;
}
#elif defined __NetBSD__
uint32_t SBC_Version::GetPeripheralAddress(void)
{
char buf[1024];
size_t len = sizeof(buf);
uint32_t address;
if (sysctlbyname("hw.model", buf, &len, NULL, 0) || strstr(buf, "ARM1176JZ-S") != buf) {
// Failed to get CPU model || Not BCM2835
// use the address of BCM283[67]
address = 0x3f000000;
} else {
// Use BCM2835 address
address = 0x20000000;
}
LOGDEBUG("Peripheral address : 0x%lx\n", address);
return address;
}
#else
uint32_t SBC_Version::GetPeripheralAddress(void)
{
return 0;
}
#endif
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