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tinyriscv-openocd/src/jtag/gw16012.c

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/***************************************************************************
* Copyright (C) 2006 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. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "interface.h"
#include "commands.h"
#if 1
#define _DEBUG_GW16012_IO_
#endif
/* system includes */
/* -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))
#else
#endif /* __FreeBSD__, __FreeBSD_kernel__ */
#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 <fcntl.h>
#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
/* configuration */
uint16_t gw16012_port;
/* interface variables
*/
static uint8_t gw16012_msb = 0x0;
static uint8_t gw16012_control_value = 0x0;
#if PARPORT_USE_PPDEV == 1
static int device_handle;
#endif
static int gw16012_execute_queue(void);
static int gw16012_register_commands(struct command_context_s *cmd_ctx);
static int gw16012_speed(int speed);
static int gw16012_init(void);
static int gw16012_quit(void);
static int gw16012_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
jtag_interface_t gw16012_interface =
{
.name = "gw16012",
.execute_queue = gw16012_execute_queue,
.speed = gw16012_speed,
.register_commands = gw16012_register_commands,
.init = gw16012_init,
.quit = gw16012_quit,
};
static int gw16012_register_commands(struct command_context_s *cmd_ctx)
{
register_command(cmd_ctx, NULL, "parport_port", gw16012_handle_parport_port_command,
COMMAND_CONFIG, NULL);
return ERROR_OK;
}
static void gw16012_data(uint8_t value)
{
value = (value & 0x7f) | gw16012_msb;
gw16012_msb ^= 0x80; /* toggle MSB */
#ifdef _DEBUG_GW16012_IO_
LOG_DEBUG("%2.2x", value);
#endif
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPWDATA, &value);
#else
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
outb(gw16012_port, value);
#else
outb(value, gw16012_port);
#endif
#endif
}
static void gw16012_control(uint8_t value)
{
if (value != gw16012_control_value)
{
gw16012_control_value = value;
#ifdef _DEBUG_GW16012_IO_
LOG_DEBUG("%2.2x", gw16012_control_value);
#endif
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPWCONTROL, &gw16012_control_value);
#else
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
outb(gw16012_port + 2, gw16012_control_value);
#else
outb(gw16012_control_value, gw16012_port + 2);
#endif
#endif
}
}
static void gw16012_input(uint8_t *value)
{
#if PARPORT_USE_PPDEV == 1
ioctl(device_handle, PPRSTATUS, value);
#else
*value = inb(gw16012_port + 1);
#endif
#ifdef _DEBUG_GW16012_IO_
LOG_DEBUG("%2.2x", *value);
#endif
}
/* (1) assert or (0) deassert reset lines */
static void gw16012_reset(int trst, int srst)
{
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
if (trst == 0)
gw16012_control(0x0d);
else if (trst == 1)
gw16012_control(0x0c);
if (srst == 0)
gw16012_control(0x0a);
else if (srst == 1)
gw16012_control(0x0b);
}
static int gw16012_speed(int speed)
{
return ERROR_OK;
}
static void gw16012_end_state(tap_state_t state)
{
if (tap_is_state_stable(state))
tap_set_end_state(state);
else
{
LOG_ERROR("BUG: %i is not a valid end state", state);
exit(-1);
}
}
static void gw16012_state_move(void)
{
int i = 0, tms = 0;
uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
gw16012_control(0x0); /* single-bit mode */
for (i = 0; i < tms_count; i++)
{
tms = (tms_scan >> i) & 1;
gw16012_data(tms << 1); /* output next TMS bit */
}
tap_set_state(tap_get_end_state());
}
static void gw16012_path_move(pathmove_command_t *cmd)
{
int num_states = cmd->num_states;
int state_count;
state_count = 0;
while (num_states)
{
gw16012_control(0x0); /* single-bit mode */
if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
{
gw16012_data(0x0); /* TCK cycle with TMS low */
}
else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
{
gw16012_data(0x2); /* TCK cycle with TMS high */
}
else
{
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
exit(-1);
}
tap_set_state(cmd->path[state_count]);
state_count++;
num_states--;
}
tap_set_end_state(tap_get_state());
}
static void gw16012_runtest(int num_cycles)
{
tap_state_t saved_end_state = tap_get_end_state();
int i;
/* only do a state_move when we're not already in IDLE */
if (tap_get_state() != TAP_IDLE)
{
gw16012_end_state(TAP_IDLE);
gw16012_state_move();
}
for (i = 0; i < num_cycles; i++)
{
gw16012_control(0x0); /* single-bit mode */
gw16012_data(0x0); /* TMS cycle with TMS low */
}
gw16012_end_state(saved_end_state);
if (tap_get_state() != tap_get_end_state())
gw16012_state_move();
}
static void gw16012_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
{
int bits_left = scan_size;
int bit_count = 0;
tap_state_t saved_end_state = tap_get_end_state();
uint8_t scan_out, scan_in;
/* only if we're not already in the correct Shift state */
if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) || (ir_scan && (tap_get_state() == TAP_IRSHIFT))))
{
if (ir_scan)
gw16012_end_state(TAP_IRSHIFT);
else
gw16012_end_state(TAP_DRSHIFT);
gw16012_state_move();
gw16012_end_state(saved_end_state);
}
while (type == SCAN_OUT && ((bits_left - 1) > 7))
{
gw16012_control(0x2); /* seven-bit mode */
scan_out = buf_get_u32(buffer, bit_count, 7);
gw16012_data(scan_out);
bit_count += 7;
bits_left -= 7;
}
gw16012_control(0x0); /* single-bit mode */
while (bits_left-- > 0)
{
uint8_t tms = 0;
scan_out = buf_get_u32(buffer, bit_count, 1);
if (bits_left == 0) /* last bit */
{
if ((ir_scan && (tap_get_end_state() == TAP_IRSHIFT))
|| (!ir_scan && (tap_get_end_state() == TAP_DRSHIFT)))
{
tms = 0;
}
else
{
tms = 2;
}
}
gw16012_data(scan_out | tms);
if (type != SCAN_OUT)
{
gw16012_input(&scan_in);
buf_set_u32(buffer, bit_count, 1, ((scan_in & 0x08) >> 3));
}
bit_count++;
}
if (!((ir_scan && (tap_get_end_state() == TAP_IRSHIFT)) ||
(!ir_scan && (tap_get_end_state() == TAP_DRSHIFT))))
{
gw16012_data(0x0);
if (ir_scan)
tap_set_state(TAP_IRPAUSE);
else
tap_set_state(TAP_DRPAUSE);
if (tap_get_state() != tap_get_end_state())
gw16012_state_move();
}
}
static int gw16012_execute_queue(void)
{
jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
int scan_size;
enum scan_type type;
uint8_t *buffer;
int retval;
/* return ERROR_OK, unless a jtag_read_buffer returns a failed check
* that wasn't handled by a caller-provided error handler
*/
retval = ERROR_OK;
while (cmd)
{
switch (cmd->type)
{
case JTAG_RESET:
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
#endif
if (cmd->cmd.reset->trst == 1)
{
tap_set_state(TAP_RESET);
}
gw16012_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
break;
case JTAG_RUNTEST:
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
#endif
gw16012_end_state(cmd->cmd.runtest->end_state);
gw16012_runtest(cmd->cmd.runtest->num_cycles);
break;
case JTAG_STATEMOVE:
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
#endif
gw16012_end_state(cmd->cmd.statemove->end_state);
gw16012_state_move();
break;
case JTAG_PATHMOVE:
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
#endif
gw16012_path_move(cmd->cmd.pathmove);
break;
case JTAG_SCAN:
gw16012_end_state(cmd->cmd.scan->end_state);
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
type = jtag_scan_type(cmd->cmd.scan);
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("%s scan (%i) %i bit end in %i", (cmd->cmd.scan->ir_scan) ? "ir" : "dr",
type, scan_size, cmd->cmd.scan->end_state);
#endif
gw16012_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
if (buffer)
free(buffer);
break;
case JTAG_SLEEP:
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("sleep %i", cmd->cmd.sleep->us);
#endif
jtag_sleep(cmd->cmd.sleep->us);
break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
}
cmd = cmd->next;
}
return retval;
}
#if PARPORT_USE_GIVEIO == 1
static int gw16012_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
#if PARPORT_USE_PPDEV == 1
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#define GW16012_PPDEV_NAME "ppi"
static int gw16012_init_ioctls(void)
{
int temp = 0;
temp = ioctl(device_handle, PPCLAIM);
if (temp < 0)
{
LOG_ERROR("cannot claim device");
return ERROR_JTAG_INIT_FAILED;
}
temp = PARPORT_MODE_COMPAT;
temp = ioctl(device_handle, PPSETMODE, &temp);
if (temp < 0)
{
LOG_ERROR(" cannot set compatible mode to device");
return ERROR_JTAG_INIT_FAILED;
}
temp = IEEE1284_MODE_COMPAT;
temp = ioctl(device_handle, PPNEGOT, &temp);
if (temp < 0)
{
LOG_ERROR("cannot set compatible 1284 mode to device");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
#else
#define GW16012_PPDEV_NAME "parport"
static int gw16012_init_ioctls(void)
{
return ERROR_OK;
}
#endif // defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
static int gw16012_init_device(void)
{
const char *device_name = GW16012_PPDEV_NAME;
char buffer[256];
if (device_handle > 0)
{
LOG_ERROR("device is already opened");
return ERROR_JTAG_INIT_FAILED;
}
snprintf(buffer, 256, "/dev/%s%d", device_name, gw16012_port);
LOG_DEBUG("opening %s...", buffer);
device_handle = open(buffer, O_WRONLY);
if (device_handle < 0)
{
LOG_ERROR("cannot open device. check it exists and that user read and write rights are set");
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("...open");
if (gw16012_init_ioctls() != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
return ERROR_OK;
}
#else // PARPORT_USE_PPDEV
static int gw16012_init_device(void)
{
if (gw16012_port == 0)
{
gw16012_port = 0x378;
LOG_WARNING("No gw16012 port specified, using default '0x378' (LPT1)");
}
LOG_DEBUG("requesting privileges for parallel port 0x%lx...", (long unsigned)(gw16012_port));
#if PARPORT_USE_GIVEIO == 1
if (gw16012_get_giveio_access() != 0)
#else /* PARPORT_USE_GIVEIO */
if (ioperm(gw16012_port, 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(gw16012_port + 2, 0x0);
#else
outb(0x0, gw16012_port + 2);
#endif
return ERROR_OK;
}
#endif // PARPORT_USE_PPDEV
static int gw16012_init(void)
{
uint8_t status_port;
if (gw16012_init_device() != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
gw16012_input(&status_port);
gw16012_msb = (status_port & 0x80) ^ 0x80;
gw16012_speed(jtag_get_speed());
gw16012_reset(0, 0);
return ERROR_OK;
}
static int gw16012_quit(void)
{
return ERROR_OK;
}
static int gw16012_handle_parport_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 1)
{
/* only if the port wasn't overwritten by cmdline */
if (gw16012_port == 0)
{
int retval = parse_u16(args[0], &gw16012_port);
if (ERROR_OK != retval)
return retval;
}
else
{
LOG_ERROR("The parport port was already configured!");
return ERROR_FAIL;
}
}
command_print(cmd_ctx, "parport port = %u", gw16012_port);
return ERROR_OK;
}
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