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74ba9207e1
Based on 1 normalized pattern(s): 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 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 write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* altera-lpt.c
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*
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* altera FPGA driver
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*
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* Copyright (C) Altera Corporation 1998-2001
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* Copyright (C) 2010 NetUP Inc.
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* Copyright (C) 2010 Abylay Ospan <aospan@netup.ru>
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*/
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include "altera-exprt.h"
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static int lpt_hardware_initialized;
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static void byteblaster_write(int port, int data)
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{
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outb((u8)data, (u16)(port + 0x378));
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};
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static int byteblaster_read(int port)
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{
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int data = 0;
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data = inb((u16)(port + 0x378));
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return data & 0xff;
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};
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int netup_jtag_io_lpt(void *device, int tms, int tdi, int read_tdo)
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{
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int data = 0;
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int tdo = 0;
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int initial_lpt_ctrl = 0;
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if (!lpt_hardware_initialized) {
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initial_lpt_ctrl = byteblaster_read(2);
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byteblaster_write(2, (initial_lpt_ctrl | 0x02) & 0xdf);
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lpt_hardware_initialized = 1;
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}
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data = ((tdi ? 0x40 : 0) | (tms ? 0x02 : 0));
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byteblaster_write(0, data);
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if (read_tdo) {
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tdo = byteblaster_read(1);
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tdo = ((tdo & 0x80) ? 0 : 1);
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}
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byteblaster_write(0, data | 0x01);
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byteblaster_write(0, data);
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return tdo;
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}
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