mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 17:24:17 +08:00
cff4fa8415
[mchehab@redhat.com: Fix a merge conflict] Signed-off-by: Igor M. Liplianin <liplianin@netup.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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;
|
|
}
|