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openocd/src/jtag/parport.c

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "config.h"
#include "log.h"
#include "jtag.h"
#include "bitbang.h"
/* system includes */
// -ino: 060521-1036
#ifdef __FreeBSD__
#include <sys/types.h>
#include <machine/sysarch.h>
#include <machine/cpufunc.h>
#define ioperm(startport,length,enable)\
i386_set_ioperm((startport), (length), (enable))
#else
#include <sys/io.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#if PARPORT_USE_PPDEV == 1
#include <linux/parport.h>
#include <linux/ppdev.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#endif
/* parallel port cable description
*/
typedef struct cable_s
{
char* name;
u8 TDO_MASK; /* status port bit containing current TDO value */
u8 TRST_MASK; /* data port bit for TRST */
u8 TMS_MASK; /* data port bit for TMS */
u8 TCK_MASK; /* data port bit for TCK */
u8 TDI_MASK; /* data port bit for TDI */
u8 SRST_MASK; /* data port bit for SRST */
u8 OUTPUT_INVERT; /* data port bits that should be inverted */
u8 INPUT_INVERT; /* status port that should be inverted */
u8 PORT_INIT; /* initialize data port with this value */
} cable_t;
cable_t cables[] =
{
/* name tdo trst tms tck tdi srst o_inv i_inv init */
{ "wiggler", 0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80 },
{ "old_amt_wiggler", 0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x11, 0x80, 0x80 },
{ "chameleon", 0x80, 0x00, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00 },
{ "dlc5", 0x10, 0x00, 0x04, 0x02, 0x01, 0x00, 0x00, 0x00, 0x10 },
{ "triton", 0x80, 0x08, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00 },
{ NULL, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
};
/* configuration */
char* parport_cable;
unsigned long parport_port;
/* interface variables
*/
static cable_t* cable;
static u8 dataport_value = 0x0;
#if PARPORT_USE_PPDEV == 1
static int device_handle;
#else
static unsigned long dataport;
static unsigned long statusport;
#endif
/* low level command set
*/
int parport_read(void);
void parport_write(int tck, int tms, int tdi);
void parport_reset(int trst, int srst);
int parport_speed(int speed);
int parport_register_commands(struct command_context_s *cmd_ctx);
int parport_init(void);
int parport_quit(void);
/* interface commands */
int parport_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int parport_handle_parport_cable_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
jtag_interface_t parport_interface =
{
.name = "parport",
.execute_queue = bitbang_execute_queue,
.support_statemove = 0,
.speed = parport_speed,
.register_commands = parport_register_commands,
.init = parport_init,
.quit = parport_quit,
};
bitbang_interface_t parport_bitbang =
{
.read = parport_read,
.write = parport_write,
.reset = parport_reset
};
int parport_read(void)
{
int data = 0;
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPRSTATUS, & data);
#else
data = inb(statusport);
#endif
if ((data ^ cable->INPUT_INVERT) & cable->TDO_MASK)
return 1;
else
return 0;
}
void parport_write(int tck, int tms, int tdi)
{
u8 output;
int i = jtag_speed + 1;
if (tck)
dataport_value |= cable->TCK_MASK;
else
dataport_value &= ~cable->TCK_MASK;
if (tms)
dataport_value |= cable->TMS_MASK;
else
dataport_value &= ~cable->TMS_MASK;
if (tdi)
dataport_value |= cable->TDI_MASK;
else
dataport_value &= ~cable->TDI_MASK;
output = dataport_value ^ cable->OUTPUT_INVERT;
while (i-- > 0)
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPWDATA, &output);
#else
#ifdef __FreeBSD__
outb(dataport, output);
#else
outb(output, dataport);
#endif
#endif
}
/* (1) assert or (0) deassert reset lines */
void parport_reset(int trst, int srst)
{
u8 output;
DEBUG("trst: %i, srst: %i", trst, srst);
if (trst == 0)
dataport_value |= cable->TRST_MASK;
else if (trst == 1)
dataport_value &= ~cable->TRST_MASK;
if (srst == 0)
dataport_value |= cable->SRST_MASK;
else if (srst == 1)
dataport_value &= ~cable->SRST_MASK;
output = dataport_value ^ cable->OUTPUT_INVERT;
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPWDATA, &output);
#else
#ifdef __FreeBSD__
outb(dataport, output);
#else
outb(output, dataport);
#endif
#endif
}
int parport_speed(int speed)
{
jtag_speed = speed;
return ERROR_OK;
}
int parport_register_commands(struct command_context_s *cmd_ctx)
{
register_command(cmd_ctx, NULL, "parport_port", parport_handle_parport_port_command,
COMMAND_CONFIG, NULL);
register_command(cmd_ctx, NULL, "parport_cable", parport_handle_parport_cable_command,
COMMAND_CONFIG, NULL);
return ERROR_OK;
}
int parport_init(void)
{
cable_t *cur_cable;
#if PARPORT_USE_PPDEV == 1
char buffer[256];
int i = 0;
#endif
cur_cable = cables;
if ((parport_cable == NULL) || (parport_cable[0] == 0))
{
parport_cable = "wiggler";
WARNING("No parport cable specified, using default 'wiggler'");
}
while (cur_cable->name)
{
if (strcmp(cur_cable->name, parport_cable) == 0)
{
cable = cur_cable;
break;
}
cur_cable++;
}
if (!cable)
{
ERROR("No matching cable found for %s", parport_cable);
return ERROR_JTAG_INIT_FAILED;
}
dataport_value = cable->PORT_INIT;
#if PARPORT_USE_PPDEV == 1
if (device_handle>0)
{
ERROR("device is already opened");
return ERROR_JTAG_INIT_FAILED;
}
snprintf(buffer, 256, "/dev/parport%d", parport_port);
device_handle = open(buffer, O_WRONLY);
if (device_handle<0)
{
ERROR("cannot open device. check it exists and that user read and write rights are set");
return ERROR_JTAG_INIT_FAILED;
}
i=ioctl(device_handle, PPCLAIM);
if (i<0)
{
ERROR("cannot claim device");
return ERROR_JTAG_INIT_FAILED;
}
i = PARPORT_MODE_COMPAT;
i= ioctl(device_handle, PPSETMODE, & i);
if (i<0)
{
ERROR(" cannot set compatible mode to device");
return ERROR_JTAG_INIT_FAILED;
}
i = IEEE1284_MODE_COMPAT;
i = ioctl(device_handle, PPNEGOT, & i);
if (i<0)
{
ERROR("cannot set compatible 1284 mode to device");
return ERROR_JTAG_INIT_FAILED;
}
#else
if (parport_port == 0)
{
parport_port = 0x378;
WARNING("No parport port specified, using default '0x378' (LPT1)");
}
dataport = parport_port;
statusport = parport_port + 1;
if (ioperm(dataport, 3, 1) != 0) {
ERROR("missing privileges for direct i/o");
return ERROR_JTAG_INIT_FAILED;
}
#endif
parport_reset(0, 0);
parport_write(0, 0, 0);
bitbang_interface = &parport_bitbang;
return ERROR_OK;
}
int parport_quit(void)
{
return ERROR_OK;
}
int parport_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 0)
return ERROR_OK;
/* only if the port wasn't overwritten by cmdline */
if (parport_port == 0)
parport_port = strtoul(args[0], NULL, 0);
return ERROR_OK;
}
int parport_handle_parport_cable_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 0)
return ERROR_OK;
/* only if the cable name wasn't overwritten by cmdline */
if (parport_cable == 0)
{
parport_cable = malloc(strlen(args[0]) + sizeof(char));
strcpy(parport_cable, args[0]);
}
return ERROR_OK;
}
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