From ac3319d9066c09606f4c578025b92b9f31a5a365 Mon Sep 17 00:00:00 2001
From: Marc Majoral <majoralmarc@gmail.com>
Date: Wed, 20 Dec 2023 17:01:24 +0100
Subject: [PATCH] remove EZDMA files

---
 .../signal_source/libs/fpga_ezdma.cc          | 68 -------------------
 .../signal_source/libs/fpga_ezdma.h           | 64 -----------------
 2 files changed, 132 deletions(-)
 delete mode 100644 src/algorithms/signal_source/libs/fpga_ezdma.cc
 delete mode 100644 src/algorithms/signal_source/libs/fpga_ezdma.h

diff --git a/src/algorithms/signal_source/libs/fpga_ezdma.cc b/src/algorithms/signal_source/libs/fpga_ezdma.cc
deleted file mode 100644
index cb8f5497e..000000000
--- a/src/algorithms/signal_source/libs/fpga_ezdma.cc
+++ /dev/null
@@ -1,68 +0,0 @@
-/*!
- * \file fpga_edma.cc
- * \brief FPGA DMA control using the ezdma (See https://github.com/jeremytrimble/ezdma).
- * \author Marc Majoral, mmajoral(at)cttc.es
- *
- * -----------------------------------------------------------------------------
- *
- * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
- * This file is part of GNSS-SDR.
- *
- * Copyright (C) 2010-2022  (see AUTHORS file for a list of contributors)
- * SPDX-License-Identifier: GPL-3.0-or-later
- *
- * -----------------------------------------------------------------------------
- */
-#include "fpga_ezdma.h"
-#include <fcntl.h>
-#include <iostream>  // for std::cerr
-#include <unistd.h>
-
-int Fpga_DMA::DMA_open()
-{
-    tx_fd = open("/dev/loop_tx", O_WRONLY);
-    if (tx_fd < 1)
-        {
-            return tx_fd;
-        }
-    // note: a problem was identified with the DMA: when switching from tx to rx or rx to tx mode
-    // the DMA transmission may hang. This problem will be fixed soon.
-    // for the moment this problem can be avoided by closing and opening the DMA a second time
-    if (close(tx_fd) < 0)
-        {
-            std::cerr << "Error closing loop device " << '\n';
-            return -1;
-        }
-    // open the DMA  a second time
-    tx_fd = open("/dev/loop_tx", O_WRONLY);
-    if (tx_fd < 1)
-        {
-            std::cerr << "Cannot open loop device\n";
-            // stop the receiver
-            return tx_fd;
-        }
-    return 0;
-}
-
-
-int8_t *Fpga_DMA::get_buffer_address()
-{
-    return buffer;
-}
-
-
-int Fpga_DMA::DMA_write(int nbytes) const
-{
-    const int num_bytes_sent = write(tx_fd, buffer, nbytes);
-    if (num_bytes_sent != nbytes)
-        {
-            return -1;
-        }
-    return 0;
-}
-
-
-int Fpga_DMA::DMA_close() const
-{
-    return close(tx_fd);
-}
diff --git a/src/algorithms/signal_source/libs/fpga_ezdma.h b/src/algorithms/signal_source/libs/fpga_ezdma.h
deleted file mode 100644
index 801d2a6b7..000000000
--- a/src/algorithms/signal_source/libs/fpga_ezdma.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*!
- * \file fpga_ezdma.h
- * \brief FPGA DMA control using the ezdma (See https://github.com/jeremytrimble/ezdma).
- * \author Marc Majoral, mmajoral(at)cttc.es
- *
- * -----------------------------------------------------------------------------
- *
- * GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
- * This file is part of GNSS-SDR.
- *
- * Copyright (C) 2010-2022  (see AUTHORS file for a list of contributors)
- * SPDX-License-Identifier: GPL-3.0-or-later
- *
- * -----------------------------------------------------------------------------
- */
-
-
-#ifndef GNSS_SDR_FPGA_EDMA_H
-#define GNSS_SDR_FPGA_EDMA_H
-
-#include <cstdint>  // for std::int8_t
-
-/*!
- * \brief Class that controls the switch DMA in the FPGA
- */
-class Fpga_DMA
-{
-public:
-    /*!
-     * \brief Default constructor.
-     */
-    Fpga_DMA() = default;
-
-    /*!
-     * \brief Default destructor.
-     */
-    ~Fpga_DMA() = default;
-
-    /*!
-     * \brief Open the DMA device driver.
-     */
-    int DMA_open(void);
-
-    /*!
-     * \brief Obtain DMA buffer address.
-     */
-    int8_t *get_buffer_address(void);  // NOLINT(readability-make-member-function-const)
-
-    /*!
-     * \brief Transfer DMA data
-     */
-    int DMA_write(int nbytes) const;
-
-    /*!
-     * \brief Close the DMA device driver
-     */
-    int DMA_close(void) const;
-
-private:
-    static const uint32_t DMA_MAX_BUFFER_SIZE = 4 * 16384;  // 4-channel 16384-sample buffers
-    int8_t buffer[DMA_MAX_BUFFER_SIZE];
-    int tx_fd;
-};
-#endif  // GNSS_SDR_FPGA_EDMA_H