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/*
* Copyright 2013 Michael Ossmann <mike@ossmann.com>
*
* This file is part of HackRF.
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "cpld_jtag.h"
#include "hackrf_core.h"
#include "xapp058/micro.h"
#include <libopencm3/lpc43xx/scu.h>
#include <stdint.h>
static refill_buffer_cb refill_buffer;
static uint32_t xsvf_buffer_len, xsvf_pos;
static unsigned char* xsvf_buffer;
void cpld_jtag_setup(jtag_t* const jtag) {
scu_pinmux(SCU_PINMUX_CPLD_TDO, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION4);
scu_pinmux(SCU_PINMUX_CPLD_TCK, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
scu_pinmux(SCU_PINMUX_CPLD_TMS, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
scu_pinmux(SCU_PINMUX_CPLD_TDI, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
gpio_input(jtag->gpio->gpio_tdo);
gpio_output(jtag->gpio->gpio_tck);
gpio_output(jtag->gpio->gpio_tms);
gpio_output(jtag->gpio->gpio_tdi);
}
/* set pins as inputs so we don't interfere with an external JTAG device */
void cpld_jtag_release(jtag_t* const jtag) {
scu_pinmux(SCU_PINMUX_CPLD_TDO, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION4);
scu_pinmux(SCU_PINMUX_CPLD_TCK, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
scu_pinmux(SCU_PINMUX_CPLD_TMS, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
scu_pinmux(SCU_PINMUX_CPLD_TDI, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
gpio_input(jtag->gpio->gpio_tdo);
gpio_input(jtag->gpio->gpio_tck);
gpio_input(jtag->gpio->gpio_tms);
gpio_input(jtag->gpio->gpio_tdi);
}
/* return 0 if success else return error code see xsvfExecute() */
int cpld_jtag_program(
jtag_t* const jtag,
const uint32_t buffer_length,
unsigned char* const buffer,
refill_buffer_cb refill
) {
int error;
cpld_jtag_setup(jtag);
xsvf_buffer = buffer;
xsvf_buffer_len = buffer_length;
refill_buffer = refill;
error = xsvfExecute(jtag->gpio);
cpld_jtag_release(jtag);
return error;
}
/* this gets called by the XAPP058 code */
unsigned char cpld_jtag_get_next_byte(void) {
if (xsvf_pos == xsvf_buffer_len) {
refill_buffer();
xsvf_pos = 0;
}
unsigned char byte = xsvf_buffer[xsvf_pos];
xsvf_pos++;
return byte;
}
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