Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* altera-lpt.c
|
|
*
|
|
* altera FPGA driver
|
|
*
|
|
* Copyright (C) Altera Corporation 1998-2001
|
|
* Copyright (C) 2010 NetUP Inc.
|
|
* Copyright (C) 2010 Abylay Ospan <aospan@netup.ru>
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include "altera-exprt.h"
|
|
|
|
static int lpt_hardware_initialized;
|
|
|
|
static void byteblaster_write(int port, int data)
|
|
{
|
|
outb((u8)data, (u16)(port + 0x378));
|
|
};
|
|
|
|
static int byteblaster_read(int port)
|
|
{
|
|
int data = 0;
|
|
data = inb((u16)(port + 0x378));
|
|
return data & 0xff;
|
|
};
|
|
|
|
int netup_jtag_io_lpt(void *device, int tms, int tdi, int read_tdo)
|
|
{
|
|
int data = 0;
|
|
int tdo = 0;
|
|
int initial_lpt_ctrl = 0;
|
|
|
|
if (!lpt_hardware_initialized) {
|
|
initial_lpt_ctrl = byteblaster_read(2);
|
|
byteblaster_write(2, (initial_lpt_ctrl | 0x02) & 0xdf);
|
|
lpt_hardware_initialized = 1;
|
|
}
|
|
|
|
data = ((tdi ? 0x40 : 0) | (tms ? 0x02 : 0));
|
|
|
|
byteblaster_write(0, data);
|
|
|
|
if (read_tdo) {
|
|
tdo = byteblaster_read(1);
|
|
tdo = ((tdo & 0x80) ? 0 : 1);
|
|
}
|
|
|
|
byteblaster_write(0, data | 0x01);
|
|
|
|
byteblaster_write(0, data);
|
|
|
|
return tdo;
|
|
}
|