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openocd/src/jtag/drivers/parport.c

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <jtag/interface.h>
#include "bitbang.h"
/* -ino: 060521-1036 */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <machine/sysarch.h>
#include <machine/cpufunc.h>
#define ioperm(startport, length, enable)\
i386_set_ioperm((startport), (length), (enable))
#endif /* __FreeBSD__ */
#if PARPORT_USE_PPDEV == 1
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <dev/ppbus/ppi.h>
#include <dev/ppbus/ppbconf.h>
#define PPRSTATUS PPIGSTATUS
#define PPWDATA PPISDATA
#else
#include <linux/parport.h>
#include <linux/ppdev.h>
#endif
#include <sys/ioctl.h>
#else /* not PARPORT_USE_PPDEV */
#ifndef _WIN32
#include <sys/io.h>
#endif
#endif
#if PARPORT_USE_GIVEIO == 1 && IS_CYGWIN == 1
#include <windows.h>
#endif
/* parallel port cable description
*/
struct cable {
const char *name;
uint8_t TDO_MASK; /* status port bit containing current TDO value */
uint8_t TRST_MASK; /* data port bit for TRST */
uint8_t TMS_MASK; /* data port bit for TMS */
uint8_t TCK_MASK; /* data port bit for TCK */
uint8_t TDI_MASK; /* data port bit for TDI */
uint8_t SRST_MASK; /* data port bit for SRST */
uint8_t OUTPUT_INVERT; /* data port bits that should be inverted */
uint8_t INPUT_INVERT; /* status port that should be inverted */
uint8_t PORT_INIT; /* initialize data port with this value */
uint8_t PORT_EXIT; /* de-initialize data port with this value */
uint8_t LED_MASK; /* data port bit for LED */
};
static const struct cable cables[] = {
/* name tdo trst tms tck tdi srst o_inv i_inv init exit led */
{ "wiggler", 0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80, 0x80, 0x00 },
{ "wiggler2", 0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x01, 0x80, 0x80, 0x00, 0x20 },
{ "wiggler_ntrst_inverted", 0x80, 0x10, 0x02, 0x04, 0x08, 0x01, 0x11, 0x80, 0x80, 0x80, 0x00 },
{ "old_amt_wiggler", 0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x11, 0x80, 0x80, 0x80, 0x00 },
{ "arm-jtag", 0x80, 0x01, 0x02, 0x04, 0x08, 0x10, 0x01, 0x80, 0x80, 0x80, 0x00 },
{ "chameleon", 0x80, 0x00, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 },
{ "dlc5", 0x10, 0x00, 0x04, 0x02, 0x01, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00 },
{ "triton", 0x80, 0x08, 0x04, 0x01, 0x02, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 },
{ "lattice", 0x40, 0x10, 0x04, 0x02, 0x01, 0x08, 0x00, 0x00, 0x18, 0x18, 0x00 },
{ "flashlink", 0x20, 0x10, 0x02, 0x01, 0x04, 0x20, 0x30, 0x20, 0x00, 0x00, 0x00 },
/* Altium Universal JTAG cable. Set the cable to Xilinx Mode and wire to target as follows:
HARD TCK - Target TCK
HARD TMS - Target TMS
HARD TDI - Target TDI
HARD TDO - Target TDO
SOFT TCK - Target TRST
SOFT TDI - Target SRST
*/
{ "altium", 0x10, 0x20, 0x04, 0x02, 0x01, 0x80, 0x00, 0x00, 0x10, 0x00, 0x08 },
{ "aspo", 0x10, 0x01, 0x04, 0x08, 0x02, 0x10, 0x17, 0x00, 0x17, 0x17, 0x00 },
{ NULL, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
};
/* configuration */
static char *parport_cable;
static uint16_t parport_port;
static bool parport_exit;
static uint32_t parport_toggling_time_ns = 1000;
static int wait_states;
/* interface variables
*/
static const struct cable *cable;
static uint8_t dataport_value;
#if PARPORT_USE_PPDEV == 1
static int device_handle;
#else
static unsigned long dataport;
static unsigned long statusport;
#endif
static 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;
}
static inline void parport_write_data(void)
{
uint8_t output;
output = dataport_value ^ cable->OUTPUT_INVERT;
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPWDATA, &output);
#else
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
outb(dataport, output);
#else
outb(output, dataport);
#endif
#endif
}
static void parport_write(int tck, int tms, int tdi)
{
int i = wait_states + 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;
while (i-- > 0)
parport_write_data();
}
/* (1) assert or (0) deassert reset lines */
static void parport_reset(int trst, int srst)
{
LOG_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;
parport_write_data();
}
/* turn LED on parport adapter on (1) or off (0) */
static void parport_led(int on)
{
if (on)
dataport_value |= cable->LED_MASK;
else
dataport_value &= ~cable->LED_MASK;
parport_write_data();
}
static int parport_speed(int speed)
{
wait_states = speed;
return ERROR_OK;
}
static int parport_khz(int khz, int *jtag_speed)
{
if (khz == 0) {
LOG_DEBUG("RCLK not supported");
return ERROR_FAIL;
}
*jtag_speed = 499999 / (khz * parport_toggling_time_ns);
return ERROR_OK;
}
static int parport_speed_div(int speed, int *khz)
{
uint32_t denominator = (speed + 1) * parport_toggling_time_ns;
*khz = (499999 + denominator) / denominator;
return ERROR_OK;
}
#if PARPORT_USE_GIVEIO == 1
static int parport_get_giveio_access(void)
{
HANDLE h;
OSVERSIONINFO version;
version.dwOSVersionInfoSize = sizeof version;
if (!GetVersionEx(&version)) {
errno = EINVAL;
return -1;
}
if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
return 0;
h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE) {
errno = ENODEV;
return -1;
}
CloseHandle(h);
return 0;
}
#endif
static struct bitbang_interface parport_bitbang = {
.read = &parport_read,
.write = &parport_write,
.reset = &parport_reset,
.blink = &parport_led,
};
static int parport_init(void)
{
const struct cable *cur_cable;
#if PARPORT_USE_PPDEV == 1
char buffer[256];
#endif
cur_cable = cables;
if (parport_cable == NULL) {
parport_cable = strdup("wiggler");
LOG_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) {
LOG_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) {
LOG_ERROR("device is already opened");
return ERROR_JTAG_INIT_FAILED;
}
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
LOG_DEBUG("opening /dev/ppi%d...", parport_port);
snprintf(buffer, 256, "/dev/ppi%d", parport_port);
device_handle = open(buffer, O_WRONLY);
#else /* not __FreeBSD__, __FreeBSD_kernel__ */
LOG_DEBUG("opening /dev/parport%d...", parport_port);
snprintf(buffer, 256, "/dev/parport%d", parport_port);
device_handle = open(buffer, O_WRONLY);
#endif /* __FreeBSD__, __FreeBSD_kernel__ */
if (device_handle < 0) {
int err = errno;
LOG_ERROR("cannot open device. check it exists and that user read and write rights are set. errno=%d", err);
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("...open");
#if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
int i = ioctl(device_handle, PPCLAIM);
if (i < 0) {
LOG_ERROR("cannot claim device");
return ERROR_JTAG_INIT_FAILED;
}
i = PARPORT_MODE_COMPAT;
i = ioctl(device_handle, PPSETMODE, &i);
if (i < 0) {
LOG_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) {
LOG_ERROR("cannot set compatible 1284 mode to device");
return ERROR_JTAG_INIT_FAILED;
}
#endif /* not __FreeBSD__, __FreeBSD_kernel__ */
#else /* not PARPORT_USE_PPDEV */
if (parport_port == 0) {
parport_port = 0x378;
LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
}
dataport = parport_port;
statusport = parport_port + 1;
LOG_DEBUG("requesting privileges for parallel port 0x%lx...", dataport);
#if PARPORT_USE_GIVEIO == 1
if (parport_get_giveio_access() != 0) {
#else /* PARPORT_USE_GIVEIO */
if (ioperm(dataport, 3, 1) != 0) {
#endif /* PARPORT_USE_GIVEIO */
LOG_ERROR("missing privileges for direct i/o");
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("...privileges granted");
/* make sure parallel port is in right mode (clear tristate and interrupt */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
outb(parport_port + 2, 0x0);
#else
outb(0x0, parport_port + 2);
#endif
#endif /* PARPORT_USE_PPDEV */
parport_reset(0, 0);
parport_write(0, 0, 0);
parport_led(1);
bitbang_interface = &parport_bitbang;
return ERROR_OK;
}
static int parport_quit(void)
{
parport_led(0);
if (parport_exit) {
dataport_value = cable->PORT_EXIT;
parport_write_data();
}
if (parport_cable) {
free(parport_cable);
parport_cable = NULL;
}
return ERROR_OK;
}
COMMAND_HANDLER(parport_handle_parport_port_command)
{
if (CMD_ARGC == 1) {
/* only if the port wasn't overwritten by cmdline */
if (parport_port == 0)
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], parport_port);
else {
LOG_ERROR("The parport port was already configured!");
return ERROR_FAIL;
}
}
command_print(CMD_CTX, "parport port = 0x%" PRIx16 "", parport_port);
return ERROR_OK;
}
COMMAND_HANDLER(parport_handle_parport_cable_command)
{
if (CMD_ARGC == 0)
return ERROR_OK;
/* only if the cable name wasn't overwritten by cmdline */
if (parport_cable == 0) {
/* REVISIT first verify that it's listed in cables[] ... */
parport_cable = malloc(strlen(CMD_ARGV[0]) + sizeof(char));
strcpy(parport_cable, CMD_ARGV[0]);
}
/* REVISIT it's probably worth returning the current value ... */
return ERROR_OK;
}
COMMAND_HANDLER(parport_handle_write_on_exit_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_ON_OFF(CMD_ARGV[0], parport_exit);
return ERROR_OK;
}
COMMAND_HANDLER(parport_handle_parport_toggling_time_command)
{
if (CMD_ARGC == 1) {
uint32_t ns;
int retval = parse_u32(CMD_ARGV[0], &ns);
if (ERROR_OK != retval)
return retval;
if (ns == 0) {
LOG_ERROR("0 ns is not a valid parport toggling time");
return ERROR_FAIL;
}
parport_toggling_time_ns = ns;
retval = jtag_get_speed(&wait_states);
if (retval != ERROR_OK) {
/* if jtag_get_speed fails then the clock_mode
* has not been configured, this happens if parport_toggling_time is
* called before the adapter speed is set */
LOG_INFO("no parport speed set - defaulting to zero wait states");
wait_states = 0;
}
}
command_print(CMD_CTX, "parport toggling time = %" PRIu32 " ns",
parport_toggling_time_ns);
return ERROR_OK;
}
static const struct command_registration parport_command_handlers[] = {
{
.name = "parport_port",
.handler = parport_handle_parport_port_command,
.mode = COMMAND_CONFIG,
.help = "Display the address of the I/O port (e.g. 0x378) "
"or the number of the '/dev/parport' device used. "
"If a parameter is provided, first change that port.",
.usage = "[port_number]",
},
{
.name = "parport_cable",
.handler = parport_handle_parport_cable_command,
.mode = COMMAND_CONFIG,
.help = "Set the layout of the parallel port cable "
"used to connect to the target.",
/* REVISIT there's no way to list layouts we know ... */
.usage = "[layout]",
},
{
.name = "parport_write_on_exit",
.handler = parport_handle_write_on_exit_command,
.mode = COMMAND_CONFIG,
.help = "Configure the parallel driver to write "
"a known value to the parallel interface on exit.",
.usage = "('on'|'off')",
},
{
.name = "parport_toggling_time",
.handler = parport_handle_parport_toggling_time_command,
.mode = COMMAND_CONFIG,
.help = "Displays or assigns how many nanoseconds it "
"takes for the hardware to toggle TCK.",
.usage = "[nanoseconds]",
},
COMMAND_REGISTRATION_DONE
};
struct jtag_interface parport_interface = {
.name = "parport",
.supported = DEBUG_CAP_TMS_SEQ,
.commands = parport_command_handlers,
.init = parport_init,
.quit = parport_quit,
.khz = parport_khz,
.speed_div = parport_speed_div,
.speed = parport_speed,
.execute_queue = bitbang_execute_queue,
};
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