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//
// Copyright 2014 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include "e300_i2c.hpp"
#include <uhd/exception.hpp>
#include <uhd/utils/byteswap.hpp>
#include <uhd/transport/udp_simple.hpp>
#include <cstring>
#include <chrono>
#include <thread>
namespace uhd { namespace usrp { namespace e300 {
class zc_impl : public i2c
{
public:
zc_impl(uhd::transport::zero_copy_if::sptr xport) : _xport(xport)
{
}
virtual ~zc_impl(void)
{
}
void set_i2c_reg8(
const uint8_t addr,
const uint8_t reg,
const uint8_t value)
{
i2c_transaction_t transaction;
transaction.type = WRITE | ONEBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
transaction.data = value;
{
uhd::transport::managed_send_buffer::sptr buff = _xport->get_send_buff(10.0);
if (not buff or buff->size() < sizeof(transaction))
throw uhd::runtime_error("i2c_zc_impl send timeout");
std::memcpy(buff->cast<void *>(), &transaction, sizeof(transaction));
buff->commit(sizeof(transaction));
}
}
uint8_t get_i2c_reg8(
const uint8_t addr,
const uint8_t reg)
{
i2c_transaction_t transaction;
transaction.type = READ | ONEBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
{
uhd::transport::managed_send_buffer::sptr buff = _xport->get_send_buff(10.0);
if (not buff or buff->size() < sizeof(transaction))
throw std::runtime_error("i2c_zc_impl send timeout");
std::memcpy(buff->cast<void *>(), &transaction, sizeof(transaction));
buff->commit(sizeof(transaction));
}
{
uhd::transport::managed_recv_buffer::sptr buff = _xport->get_recv_buff(10.0);
if (not buff or buff->size() < sizeof(transaction))
throw std::runtime_error("i2c_zc_impl recv timeout");
std::memcpy(&transaction, buff->cast<const void *>(), sizeof(transaction));
}
return transaction.data;
}
void set_i2c_reg16(
const uint8_t addr,
const uint16_t reg,
const uint8_t value)
{
i2c_transaction_t transaction;
transaction.type = WRITE | TWOBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
transaction.data = value;
{
uhd::transport::managed_send_buffer::sptr buff = _xport->get_send_buff(10.0);
if (not buff or buff->size() < sizeof(transaction))
throw uhd::runtime_error("i2c_zc_impl send timeout");
std::memcpy(buff->cast<void *>(), &transaction, sizeof(transaction));
buff->commit(sizeof(transaction));
}
}
uint8_t get_i2c_reg16(
const uint8_t addr,
const uint16_t reg)
{
i2c_transaction_t transaction;
transaction.type = READ | TWOBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
{
uhd::transport::managed_send_buffer::sptr buff = _xport->get_send_buff(10.0);
if (not buff or buff->size() < sizeof(transaction))
throw std::runtime_error("i2c_zc_impl send timeout");
std::memcpy(buff->cast<void *>(), &transaction, sizeof(transaction));
buff->commit(sizeof(transaction));
}
{
uhd::transport::managed_recv_buffer::sptr buff = _xport->get_recv_buff(10.0);
if (not buff or buff->size() < sizeof(transaction))
throw std::runtime_error("i2c_zc_impl recv timeout");
std::memcpy(&transaction, buff->cast<const void *>(), sizeof(transaction));
}
return transaction.data;
}
private:
uhd::transport::zero_copy_if::sptr _xport;
};
i2c::sptr i2c::make_zc(uhd::transport::zero_copy_if::sptr xport)
{
return sptr(new zc_impl(xport));
}
class simple_udp_impl : public i2c
{
public:
simple_udp_impl(const std::string &ip_addr, const std::string &port)
{
_xport = uhd::transport::udp_simple::make_connected(ip_addr, port);
}
virtual ~simple_udp_impl(void)
{
}
void set_i2c_reg8(
const uint8_t addr,
const uint8_t reg,
const uint8_t value)
{
i2c_transaction_t transaction;
transaction.type = i2c::WRITE | ONEBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
transaction.data = value;
_xport->send(
boost::asio::buffer(
&transaction,
sizeof(transaction)));
}
uint8_t get_i2c_reg8(
const uint8_t addr,
const uint8_t reg)
{
i2c_transaction_t transaction;
transaction.type = i2c::READ | ONEBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
transaction.data = 0;
_xport->send(
boost::asio::buffer(
&transaction,
sizeof(transaction)));
uint8_t buff[sizeof(i2c_transaction_t)] = {};
const size_t nbytes = _xport->recv(
boost::asio::buffer(buff), 0.100);
if (not (nbytes == sizeof(transaction)))
throw std::runtime_error("i2c_simple_udp_impl recv timeout");
i2c_transaction_t *reply = reinterpret_cast<i2c_transaction_t*>(buff);
return reply->data;
}
void set_i2c_reg16(
const uint8_t addr,
const uint16_t reg,
const uint8_t value)
{
i2c_transaction_t transaction;
transaction.type = i2c::WRITE | TWOBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
transaction.data = value;
_xport->send(
boost::asio::buffer(
&transaction,
sizeof(transaction)));
}
uint8_t get_i2c_reg16(
const uint8_t addr,
const uint16_t reg)
{
i2c_transaction_t transaction;
transaction.type = i2c::READ | TWOBYTE;
transaction.addr = addr;
transaction.reg = uhd::htonx<uint16_t>(reg);
transaction.data = 0;
_xport->send(
boost::asio::buffer(
&transaction,
sizeof(transaction)));
uint8_t buff[sizeof(i2c_transaction_t)] = {};
const size_t nbytes = _xport->recv(
boost::asio::buffer(buff), 0.100);
if (not (nbytes == sizeof(transaction)))
throw std::runtime_error("i2c_simple_udp_impl recv timeout");
i2c_transaction_t *reply = reinterpret_cast<i2c_transaction_t*>(buff);
return reply->data;
}
private:
uhd::transport::udp_simple::sptr _xport;
};
i2c::sptr i2c::make_simple_udp(
const std::string &ip_addr,
const std::string &port)
{
return sptr(new simple_udp_impl(ip_addr,port));
}
}}} // namespace
#ifdef E300_NATIVE
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <boost/thread.hpp>
#include <stdint.h>
namespace uhd { namespace usrp { namespace e300 {
class i2cdev_impl : public i2c
{
public:
i2cdev_impl(const std::string &device)
{
_fd = ::open(device.c_str(), O_RDWR);
if (_fd < 0)
throw uhd::system_error("open failed.");
}
virtual ~i2cdev_impl(void)
{
close(_fd);
}
void set_i2c_reg8(
const uint8_t addr,
const uint8_t reg,
const uint8_t value)
{
uint8_t outbuf[2];
i2c_rdwr_ioctl_data packets;
i2c_msg messages[1];
messages[0].addr = addr;
messages[0].flags = 0;
messages[0].len = sizeof(outbuf);
messages[0].buf = outbuf;
outbuf[0] = reg;
outbuf[1] = value;
packets.msgs = messages;
packets.nmsgs = 1;
if(::ioctl(_fd, I2C_RDWR, &packets) < 0) {
throw std::runtime_error("ioctl failed");
}
// this is ugly
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
uint8_t get_i2c_reg8(
const uint8_t addr,
const uint8_t reg)
{
i2c_rdwr_ioctl_data packets;
i2c_msg messages[2];
uint8_t outbuf = reg;
messages[0].addr = addr;
messages[0].flags = 0;
messages[0].len = sizeof(outbuf);
messages[0].buf = &outbuf;
uint8_t inbuf;
messages[1].addr = addr;
messages[1].flags = I2C_M_RD;
messages[1].len = sizeof(inbuf);
messages[1].buf = &inbuf;
packets.msgs = messages;
packets.nmsgs = 2;
if(::ioctl(_fd, I2C_RDWR, &packets) < 0) {
throw std::runtime_error("ioctl failed.");
}
return inbuf;
}
// the daughterboard uses 16 bit addresses
void set_i2c_reg16(
const uint8_t addr,
const uint16_t reg,
const uint8_t value)
{
uint8_t outbuf[3];
i2c_rdwr_ioctl_data packets;
i2c_msg messages[1];
messages[0].addr = addr;
messages[0].flags = 0;
messages[0].len = sizeof(outbuf);
messages[0].buf = outbuf;
outbuf[0] = (reg >> 8) & 0xff;
outbuf[1] = reg & 0xff;
outbuf[2] = value;
packets.msgs = messages;
packets.nmsgs = 1;
if(::ioctl(_fd, I2C_RDWR, &packets) < 0) {
throw std::runtime_error("ioctl failed");
}
// this is ugly
std::this_thread::sleep_for(std::chrono::milliseconds(5));
}
// the daughterboard eeprom uses 16 bit addresses
uint8_t get_i2c_reg16(
const uint8_t addr,
const uint16_t reg)
{
i2c_rdwr_ioctl_data packets;
i2c_msg messages[2];
// always little endian
uint8_t outbuf[2];
outbuf[0] = (reg >> 8) & 0xff;
outbuf[1] = reg & 0xff;
messages[0].addr = addr;
messages[0].flags = 0;
messages[0].len = sizeof(outbuf);
messages[0].buf = outbuf;
uint8_t inbuf;
messages[1].addr = addr;
messages[1].flags = I2C_M_RD;
messages[1].len = sizeof(inbuf);
messages[1].buf = &inbuf;
packets.msgs = messages;
packets.nmsgs = 2;
if(::ioctl(_fd, I2C_RDWR, &packets) < 0) {
throw std::runtime_error("ioctl failed.");
}
return inbuf;
}
private:
int _fd;
};
}}} // namespace
using namespace uhd::usrp::e300;
i2c::sptr i2c::make_i2cdev(const std::string &device)
{
return sptr(new i2cdev_impl(device));
}
#else
using namespace uhd::usrp::e300;
i2c::sptr i2c::make_i2cdev(const std::string &)
{
throw uhd::assertion_error("i2c::make() !E300_NATIVE");
}
#endif // E300_NATIVE
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