1 files changed, 272 insertions, 0 deletions
diff --git a/host/lib/usrp/e100/fpga_downloader.cpp b/host/lib/usrp/e100/fpga_downloader.cpp
new file mode 100644
index 000000000..7074c8299
--- /dev/null
+++ b/host/lib/usrp/e100/fpga_downloader.cpp
@@ -0,0 +1,272 @@
+//
+// Copyright 2010-2011 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/config.hpp>
+#ifdef UHD_DLL_EXPORTS
+#include <uhd/exception.hpp>
+#include <uhd/utils/msg.hpp>
+#else //special case when this file is externally included
+#include <stdexcept>
+#include <iostream>
+#define UHD_MSG(type) std::cout
+namespace uhd{
+    typedef std::runtime_error os_error;
+    typedef std::runtime_error io_error;
+}
+#endif
+
+#include <sstream>
+#include <fstream>
+#include <string>
+#include <cstdlib>
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+
+#include <linux/spi/spidev.h>
+
+/*
+ * Configuration connections
+ *
+ * CCK    - MCSPI1_CLK
+ * DIN    - MCSPI1_MOSI
+ * PROG_B - GPIO_175     - output (change mux)
+ * DONE   - GPIO_173     - input  (change mux)
+ * INIT_B - GPIO_114     - input  (change mux)
+ *
+*/
+
+namespace usrp_e_fpga_downloader_utility{
+
+const unsigned int PROG_B = 175;
+const unsigned int DONE   = 173;
+const unsigned int INIT_B = 114;
+
+//static std::string bit_file = "safe_u1e.bin";
+
+const int BUF_SIZE = 4096;
+
+enum gpio_direction {IN, OUT};
+
+class gpio {
+	public:
+
+	gpio(unsigned int gpio_num, gpio_direction pin_direction);
+
+	bool get_value();
+	void set_value(bool state);
+
+	private:
+
+	std::stringstream base_path;
+	std::fstream value_file;	
+};
+
+class spidev {
+	public:
+
+	spidev(std::string dev_name);
+	~spidev();
+
+	void send(char *wbuf, char *rbuf, unsigned int nbytes);
+
+	private:
+
+	int fd;
+
+};
+
+gpio::gpio(unsigned int gpio_num, gpio_direction pin_direction)
+{
+	std::fstream export_file;
+
+	export_file.open("/sys/class/gpio/export", std::ios::out);
+	if (not export_file.is_open()) throw uhd::os_error(
+		"Failed to open gpio export file."
+	);
+
+	export_file << gpio_num << std::endl;
+
+	base_path << "/sys/class/gpio/gpio" << gpio_num << std::flush;
+
+	std::fstream direction_file;
+	std::string direction_file_name;
+
+	if (gpio_num != 114) {
+		direction_file_name = base_path.str() + "/direction";
+
+		direction_file.open(direction_file_name.c_str());
+		if (!direction_file.is_open()) throw uhd::os_error(
+			"Failed to open direction file."
+		);
+		if (pin_direction == OUT)
+			direction_file << "out" << std::endl;
+		else
+			direction_file << "in" << std::endl;
+	}
+
+	std::string value_file_name;
+
+	value_file_name = base_path.str() + "/value";
+
+	value_file.open(value_file_name.c_str(), std::ios_base::in | std::ios_base::out);
+	if (!value_file.is_open()) throw uhd::os_error(
+		"Failed to open value file."
+	);
+}
+
+bool gpio::get_value()
+{
+
+	std::string val;
+
+	std::getline(value_file, val);
+	value_file.seekg(0);
+
+	if (val == "0")
+		return false;
+	else if (val == "1")
+		return true;
+	else
+		throw uhd::os_error("Data read from value file|" + val + "|");
+
+	return false;
+}
+
+void gpio::set_value(bool state)
+{
+
+	if (state)
+		value_file << "1" << std::endl;
+	else
+		value_file << "0" << std::endl;
+}
+
+static void prepare_fpga_for_configuration(gpio &prog, gpio &)//init)
+{
+
+	prog.set_value(true);
+	prog.set_value(false);
+	prog.set_value(true);
+
+#if 0
+	bool ready_to_program(false);
+	unsigned int count(0);
+	do {
+		ready_to_program = init.get_value();
+		count++;
+
+		sleep(1);
+	} while (count < 10 && !ready_to_program);
+
+	if (count == 10) {
+		throw uhd::os_error("FPGA not ready for programming.");
+	}
+#endif
+}
+
+spidev::spidev(std::string fname)
+{
+	int ret;
+	int mode = 0;
+	int speed = 12000000;
+	int bits = 8;
+
+	fd = open(fname.c_str(), O_RDWR);
+
+	ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
+	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
+	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
+}
+	
+
+spidev::~spidev()
+{
+	close(fd);
+}
+
+void spidev::send(char *buf, char *rbuf, unsigned int nbytes)
+{
+	int ret;
+
+	struct spi_ioc_transfer tr;
+	tr.tx_buf = (unsigned long) buf;
+	tr.rx_buf = (unsigned long) rbuf;
+	tr.len = nbytes;
+	tr.delay_usecs = 0;
+	tr.speed_hz = 48000000;
+	tr.bits_per_word = 8;
+
+	ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);	
+
+}
+
+static void send_file_to_fpga(const std::string &file_name, gpio &error, gpio &done)
+{
+	std::ifstream bitstream;
+
+	bitstream.open(file_name.c_str(), std::ios::binary);
+	if (!bitstream.is_open()) throw uhd::os_error(
+		"Coult not open the file: " + file_name
+	);
+
+	spidev spi("/dev/spidev1.0");
+	char buf[BUF_SIZE];
+	char rbuf[BUF_SIZE];
+
+	do {
+		bitstream.read(buf, BUF_SIZE);
+		spi.send(buf, rbuf, bitstream.gcount());
+
+		if (error.get_value())
+			throw uhd::os_error("INIT_B went high, error occured.");
+
+		if (!done.get_value())
+			UHD_MSG(status) << "Configuration complete." << std::endl;
+
+	} while (bitstream.gcount() == BUF_SIZE);
+}
+
+}//namespace usrp_e_fpga_downloader_utility
+
+void e100_load_fpga(const std::string &bin_file){
+	using namespace usrp_e_fpga_downloader_utility;
+
+	gpio gpio_prog_b(PROG_B, OUT);
+	gpio gpio_init_b(INIT_B, IN);
+	gpio gpio_done  (DONE,   IN);
+
+	UHD_MSG(status) << "Loading FPGA image: " << bin_file << "... " << std::flush;
+
+//	if(std::system("/sbin/rmmod usrp_e") != 0){
+//		UHD_MSG(warning) << "USRP-E100 FPGA downloader: could not unload usrp_e module" << std::endl;
+//	}
+
+	prepare_fpga_for_configuration(gpio_prog_b, gpio_init_b);
+
+	UHD_MSG(status) << "done = " << gpio_done.get_value() << std::endl;
+
+	send_file_to_fpga(bin_file, gpio_init_b, gpio_done);
+
+//	if(std::system("/sbin/modprobe usrp_e") != 0){
+//		UHD_MSG(warning) << "USRP-E100 FPGA downloader: could not load usrp_e module" << std::endl;
+//	}
+
+}
+