/*
 * bs_explorer glue for libsvf: maps the svf_jtag_ops port onto the
 * bscan_* TAP primitives.
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */

#include <unistd.h>

#include "svf_glue.h"
#include "bscan/bscan.h"

static int ops_tap_reset(void *ctx)
{
    return bscan_tap_reset((jtag_core *)ctx);
}

static int ops_shift_ir(void *ctx, const uint8_t *tdi, uint8_t *tdo, int nbits)
{
    return bscan_shift_ir((jtag_core *)ctx, tdi, tdo, nbits);
}

static int ops_shift_dr(void *ctx, const uint8_t *tdi, uint8_t *tdo, int nbits)
{
    return bscan_shift_dr((jtag_core *)ctx, tdi, tdo, nbits);
}

static int ops_idle_cycles(void *ctx, int ncycles)
{
    return bscan_idle_cycles((jtag_core *)ctx, ncycles);
}

static void ops_delay_us(void *ctx, unsigned long us)
{
    (void)ctx;
    usleep((useconds_t)us);
}

static const svf_jtag_ops bscan_svf_ops = {
    .tap_reset   = ops_tap_reset,
    .shift_ir    = ops_shift_ir,
    .shift_dr    = ops_shift_dr,
    .idle_cycles = ops_idle_cycles,
    .delay_us    = ops_delay_us,
};

int bs_svf_play(jtag_core *jc, const char *path,
                svf_log_fn log, void *user, svf_stats *stats)
{
    /* Warm up the link before the first real scan: the FTDI MPSSE's first
     * data read after a fresh open returns stale FIFO content. The normal
     * Viveris flow hides this (jtag_scan/autoinit runs first); do a
     * throwaway reset + DR read so a standalone svf_play is reliable. */
    uint8_t junk[4];
    bscan_tap_reset(jc);
    bscan_shift_dr(jc, NULL, junk, 32);

    return svf_play_file(&bscan_svf_ops, jc, path, log, user, stats);
}