608 lines
16 KiB
C
608 lines
16 KiB
C
/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <jtag/interface.h>
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#if PARPORT_USE_PPDEV == 1
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#include <linux/parport.h>
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#include <linux/ppdev.h>
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#include <sys/ioctl.h>
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#else /* not PARPORT_USE_PPDEV */
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#ifndef _WIN32
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#include <sys/io.h>
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#endif
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#endif
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#if PARPORT_USE_GIVEIO == 1
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#if IS_CYGWIN == 1
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#include <windows.h>
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#endif
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#endif
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/**
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* @file
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* Support the Amontec Chameleon POD with JTAG Accelerator support.
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* This is a parallel port JTAG adapter with a CPLD between the
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* parallel port and the JTAG connection. VHDL code running in the
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* CPLD significantly accelerates JTAG operations compared to the
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* bitbanging "Wiggler" style of most parallel port adapters.
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*/
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/* configuration */
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static uint16_t amt_jtagaccel_port;
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/* interface variables
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*/
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static uint8_t aw_control_rst;
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static uint8_t aw_control_fsm = 0x10;
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static uint8_t aw_control_baudrate = 0x20;
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static int rtck_enabled;
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#if PARPORT_USE_PPDEV == 1
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static int device_handle;
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static const int addr_mode = IEEE1284_MODE_EPP | IEEE1284_ADDR;
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/* FIXME do something sane when these ioctl/read/write calls fail. */
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#define AMT_AW(val) \
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do { \
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int __retval; \
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\
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__retval = ioctl(device_handle, PPSETMODE, &addr_mode); \
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assert(__retval >= 0); \
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__retval = write(device_handle, &val, 1); \
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assert(__retval >= 0); \
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} while (0)
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#define AMT_AR(val) \
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do { \
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int __retval; \
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\
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__retval = ioctl(device_handle, PPSETMODE, &addr_mode); \
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assert(__retval >= 0); \
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__retval = read(device_handle, &val, 1); \
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assert(__retval >= 0); \
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} while (0)
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static const int data_mode = IEEE1284_MODE_EPP | IEEE1284_DATA;
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#define AMT_DW(val) \
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do { \
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int __retval; \
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\
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__retval = ioctl(device_handle, PPSETMODE, &data_mode); \
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assert(__retval >= 0); \
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__retval = write(device_handle, &val, 1); \
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assert(__retval >= 0); \
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} while (0)
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#define AMT_DR(val) \
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do { \
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int __retval; \
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\
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__retval = ioctl(device_handle, PPSETMODE, &data_mode); \
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assert(__retval >= 0); \
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__retval = read(device_handle, &val, 1); \
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assert(__retval >= 0); \
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} while (0)
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#else
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#define AMT_AW(val) do { outb(val, amt_jtagaccel_port + 3); } while (0)
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#define AMT_AR(val) do { val = inb(amt_jtagaccel_port + 3); } while (0)
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#define AMT_DW(val) do { outb(val, amt_jtagaccel_port + 4); } while (0)
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#define AMT_DR(val) do { val = inb(amt_jtagaccel_port + 4); } while (0)
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#endif /* PARPORT_USE_PPDEV */
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/* tap_move[i][j]: tap movement command to go from state i to state j
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* 0: Test-Logic-Reset
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* 1: Run-Test/Idle
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* 2: Shift-DR
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* 3: Pause-DR
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* 4: Shift-IR
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* 5: Pause-IR
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*/
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static const uint8_t amt_jtagaccel_tap_move[6][6][2] = {
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/* RESET IDLE DRSHIFT DRPAUSE IRSHIFT IRPAUSE */
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{ {0x1f, 0x00}, {0x0f, 0x00}, {0x05, 0x00}, {0x0a, 0x00}, {0x06, 0x00}, {0x96, 0x00} }, /* RESET */
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{ {0x1f, 0x00}, {0x00, 0x00}, {0x04, 0x00}, {0x05, 0x00}, {0x06, 0x00}, {0x0b, 0x00} }, /* IDLE */
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{ {0x1f, 0x00}, {0x0d, 0x00}, {0x00, 0x00}, {0x01, 0x00}, {0x8f, 0x09}, {0x8f, 0x01} }, /* DRSHIFT */
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{ {0x1f, 0x00}, {0x0c, 0x00}, {0x08, 0x00}, {0x00, 0x00}, {0x8f, 0x09}, {0x8f, 0x01} }, /* DRPAUSE */
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{ {0x1f, 0x00}, {0x0d, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x00, 0x00}, {0x01, 0x00} }, /* IRSHIFT */
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{ {0x1f, 0x00}, {0x0c, 0x00}, {0x07, 0x00}, {0x97, 0x00}, {0x08, 0x00}, {0x00, 0x00} }, /* IRPAUSE */
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};
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static void amt_jtagaccel_reset(int trst, int srst)
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{
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if (trst == 1)
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aw_control_rst |= 0x4;
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else if (trst == 0)
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aw_control_rst &= ~0x4;
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if (srst == 1)
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aw_control_rst |= 0x1;
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else if (srst == 0)
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aw_control_rst &= ~0x1;
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AMT_AW(aw_control_rst);
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}
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static int amt_jtagaccel_speed(int speed)
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{
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aw_control_baudrate &= 0xf0;
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aw_control_baudrate |= speed & 0x0f;
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AMT_AW(aw_control_baudrate);
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return ERROR_OK;
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}
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static void amt_jtagaccel_end_state(tap_state_t state)
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{
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if (tap_is_state_stable(state))
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tap_set_end_state(state);
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else {
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LOG_ERROR("BUG: %i is not a valid end state", state);
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exit(-1);
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}
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}
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static void amt_wait_scan_busy(void)
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{
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int timeout = 4096;
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uint8_t ar_status;
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AMT_AR(ar_status);
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while (((ar_status) & 0x80) && (timeout-- > 0))
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AMT_AR(ar_status);
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if (ar_status & 0x80) {
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LOG_ERROR(
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"amt_jtagaccel timed out while waiting for end of scan, rtck was %s, last AR_STATUS: 0x%2.2x",
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(rtck_enabled) ? "enabled" : "disabled",
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ar_status);
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exit(-1);
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}
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}
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static void amt_jtagaccel_state_move(void)
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{
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uint8_t aw_scan_tms_5;
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uint8_t tms_scan[2];
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tap_state_t cur_state = tap_get_state();
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tap_state_t end_state = tap_get_end_state();
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tms_scan[0] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][0];
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tms_scan[1] = amt_jtagaccel_tap_move[tap_move_ndx(cur_state)][tap_move_ndx(end_state)][1];
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aw_scan_tms_5 = 0x40 | (tms_scan[0] & 0x1f);
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AMT_AW(aw_scan_tms_5);
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int jtag_speed = 0;
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int retval = jtag_get_speed(&jtag_speed);
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assert(retval == ERROR_OK);
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if (jtag_speed > 3 || rtck_enabled)
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amt_wait_scan_busy();
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if (tms_scan[0] & 0x80) {
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aw_scan_tms_5 = 0x40 | (tms_scan[1] & 0x1f);
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AMT_AW(aw_scan_tms_5);
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if (jtag_speed > 3 || rtck_enabled)
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amt_wait_scan_busy();
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}
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tap_set_state(end_state);
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}
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static void amt_jtagaccel_runtest(int num_cycles)
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{
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int i = 0;
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uint8_t aw_scan_tms_5;
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uint8_t aw_scan_tms_1to4;
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tap_state_t saved_end_state = tap_get_end_state();
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/* only do a state_move when we're not already in IDLE */
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if (tap_get_state() != TAP_IDLE) {
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amt_jtagaccel_end_state(TAP_IDLE);
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amt_jtagaccel_state_move();
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}
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while (num_cycles - i >= 5) {
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aw_scan_tms_5 = 0x40;
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AMT_AW(aw_scan_tms_5);
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i += 5;
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}
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if (num_cycles - i > 0) {
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aw_scan_tms_1to4 = 0x80 | ((num_cycles - i - 1) & 0x3) << 4;
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AMT_AW(aw_scan_tms_1to4);
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}
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amt_jtagaccel_end_state(saved_end_state);
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if (tap_get_state() != tap_get_end_state())
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amt_jtagaccel_state_move();
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}
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static void amt_jtagaccel_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
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{
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int bits_left = scan_size;
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int bit_count = 0;
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tap_state_t saved_end_state = tap_get_end_state();
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uint8_t aw_tdi_option;
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uint8_t dw_tdi_scan;
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uint8_t dr_tdo;
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uint8_t aw_tms_scan;
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uint8_t tms_scan[2];
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int jtag_speed_var;
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int retval = jtag_get_speed(&jtag_speed_var);
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assert(retval == ERROR_OK);
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if (ir_scan)
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amt_jtagaccel_end_state(TAP_IRSHIFT);
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else
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amt_jtagaccel_end_state(TAP_DRSHIFT);
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/* Only move if we're not already there */
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if (tap_get_state() != tap_get_end_state())
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amt_jtagaccel_state_move();
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amt_jtagaccel_end_state(saved_end_state);
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/* handle unaligned bits at the beginning */
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if ((scan_size - 1) % 8) {
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aw_tdi_option = 0x30 | (((scan_size - 1) % 8) - 1);
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AMT_AW(aw_tdi_option);
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dw_tdi_scan = buf_get_u32(buffer, bit_count, (scan_size - 1) % 8) & 0xff;
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AMT_DW(dw_tdi_scan);
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if (jtag_speed_var > 3 || rtck_enabled)
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amt_wait_scan_busy();
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if ((type == SCAN_IN) || (type == SCAN_IO)) {
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AMT_DR(dr_tdo);
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dr_tdo = dr_tdo >> (8 - ((scan_size - 1) % 8));
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buf_set_u32(buffer, bit_count, (scan_size - 1) % 8, dr_tdo);
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}
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bit_count += (scan_size - 1) % 8;
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bits_left -= (scan_size - 1) % 8;
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}
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while (bits_left - 1 >= 8) {
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dw_tdi_scan = buf_get_u32(buffer, bit_count, 8) & 0xff;
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AMT_DW(dw_tdi_scan);
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if (jtag_speed_var > 3 || rtck_enabled)
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amt_wait_scan_busy();
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if ((type == SCAN_IN) || (type == SCAN_IO)) {
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AMT_DR(dr_tdo);
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buf_set_u32(buffer, bit_count, 8, dr_tdo);
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}
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bit_count += 8;
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bits_left -= 8;
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}
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tms_scan[0] =
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amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][0];
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tms_scan[1] =
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amt_jtagaccel_tap_move[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())][1];
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aw_tms_scan = 0x40 | (tms_scan[0] & 0x1f) | (buf_get_u32(buffer, bit_count, 1) << 5);
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AMT_AW(aw_tms_scan);
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if (jtag_speed_var > 3 || rtck_enabled)
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amt_wait_scan_busy();
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if ((type == SCAN_IN) || (type == SCAN_IO)) {
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AMT_DR(dr_tdo);
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dr_tdo = dr_tdo >> 7;
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buf_set_u32(buffer, bit_count, 1, dr_tdo);
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}
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if (tms_scan[0] & 0x80) {
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aw_tms_scan = 0x40 | (tms_scan[1] & 0x1f);
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AMT_AW(aw_tms_scan);
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if (jtag_speed_var > 3 || rtck_enabled)
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amt_wait_scan_busy();
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}
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tap_set_state(tap_get_end_state());
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}
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static int amt_jtagaccel_execute_queue(void)
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{
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struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
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int scan_size;
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enum scan_type type;
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uint8_t *buffer;
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int retval;
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/* return ERROR_OK, unless a jtag_read_buffer returns a failed check
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* that wasn't handled by a caller-provided error handler
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*/
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retval = ERROR_OK;
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while (cmd) {
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switch (cmd->type) {
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case JTAG_RESET:
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#ifdef _DEBUG_JTAG_IO_
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LOG_DEBUG("reset trst: %i srst %i",
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cmd->cmd.reset->trst,
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cmd->cmd.reset->srst);
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#endif
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if (cmd->cmd.reset->trst == 1)
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tap_set_state(TAP_RESET);
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amt_jtagaccel_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
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break;
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case JTAG_RUNTEST:
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#ifdef _DEBUG_JTAG_IO_
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LOG_DEBUG("runtest %i cycles, end in %i",
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cmd->cmd.runtest->num_cycles,
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cmd->cmd.runtest->end_state);
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#endif
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amt_jtagaccel_end_state(cmd->cmd.runtest->end_state);
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amt_jtagaccel_runtest(cmd->cmd.runtest->num_cycles);
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break;
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case JTAG_TLR_RESET:
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#ifdef _DEBUG_JTAG_IO_
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LOG_DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
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#endif
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amt_jtagaccel_end_state(cmd->cmd.statemove->end_state);
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amt_jtagaccel_state_move();
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break;
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case JTAG_SCAN:
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#ifdef _DEBUG_JTAG_IO_
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LOG_DEBUG("scan end in %i", cmd->cmd.scan->end_state);
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#endif
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amt_jtagaccel_end_state(cmd->cmd.scan->end_state);
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scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
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type = jtag_scan_type(cmd->cmd.scan);
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amt_jtagaccel_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
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if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
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retval = ERROR_JTAG_QUEUE_FAILED;
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if (buffer)
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free(buffer);
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break;
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case JTAG_SLEEP:
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#ifdef _DEBUG_JTAG_IO_
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LOG_DEBUG("sleep %" PRIi32, cmd->cmd.sleep->us);
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#endif
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jtag_sleep(cmd->cmd.sleep->us);
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break;
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default:
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LOG_ERROR("BUG: unknown JTAG command type encountered");
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exit(-1);
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}
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cmd = cmd->next;
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}
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return retval;
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}
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#if PARPORT_USE_GIVEIO == 1
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int amt_jtagaccel_get_giveio_access(void)
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{
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HANDLE h;
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OSVERSIONINFO version;
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version.dwOSVersionInfoSize = sizeof version;
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if (!GetVersionEx(&version)) {
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errno = EINVAL;
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return -1;
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}
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if (version.dwPlatformId != VER_PLATFORM_WIN32_NT)
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return 0;
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h = CreateFile("\\\\.\\giveio",
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GENERIC_READ,
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0,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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if (h == INVALID_HANDLE_VALUE) {
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errno = ENODEV;
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return -1;
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}
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CloseHandle(h);
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return 0;
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}
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#endif
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static int amt_jtagaccel_init(void)
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{
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#if PARPORT_USE_PPDEV == 1
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char buffer[256];
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int i = 0;
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uint8_t control_port;
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#else
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uint8_t status_port;
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#endif
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uint8_t ar_status;
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#if PARPORT_USE_PPDEV == 1
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if (device_handle > 0) {
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LOG_ERROR("device is already opened");
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return ERROR_JTAG_INIT_FAILED;
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}
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snprintf(buffer, 256, "/dev/parport%d", amt_jtagaccel_port);
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device_handle = open(buffer, O_RDWR);
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if (device_handle < 0) {
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LOG_ERROR(
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"cannot open device. check it exists and that user read and write rights are set");
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return ERROR_JTAG_INIT_FAILED;
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}
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i = ioctl(device_handle, PPCLAIM);
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if (i < 0) {
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LOG_ERROR("cannot claim device");
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return ERROR_JTAG_INIT_FAILED;
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}
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i = IEEE1284_MODE_EPP;
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i = ioctl(device_handle, PPSETMODE, &i);
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if (i < 0) {
|
|
LOG_ERROR(" cannot set compatible mode to device");
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
control_port = 0x00;
|
|
i = ioctl(device_handle, PPWCONTROL, &control_port);
|
|
|
|
control_port = 0x04;
|
|
i = ioctl(device_handle, PPWCONTROL, &control_port);
|
|
|
|
#else
|
|
if (amt_jtagaccel_port == 0) {
|
|
amt_jtagaccel_port = 0x378;
|
|
LOG_WARNING("No parport port specified, using default '0x378' (LPT1)");
|
|
}
|
|
|
|
#if PARPORT_USE_GIVEIO == 1
|
|
if (amt_jtagaccel_get_giveio_access() != 0) {
|
|
#else /* PARPORT_USE_GIVEIO */
|
|
if (ioperm(amt_jtagaccel_port, 5, 1) != 0) {
|
|
#endif /* PARPORT_USE_GIVEIO */
|
|
LOG_ERROR("missing privileges for direct i/o");
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
/* prepare epp port
|
|
* clear timeout */
|
|
status_port = inb(amt_jtagaccel_port + 1);
|
|
outb(status_port | 0x1, amt_jtagaccel_port + 1);
|
|
|
|
/* reset epp port */
|
|
outb(0x00, amt_jtagaccel_port + 2);
|
|
outb(0x04, amt_jtagaccel_port + 2);
|
|
#endif
|
|
|
|
if (rtck_enabled) {
|
|
/* set RTCK enable bit */
|
|
aw_control_fsm |= 0x02;
|
|
}
|
|
|
|
/* enable JTAG port */
|
|
aw_control_fsm |= 0x04;
|
|
AMT_AW(aw_control_fsm);
|
|
|
|
enum reset_types jtag_reset_config = jtag_get_reset_config();
|
|
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
|
|
aw_control_rst &= ~0x8;
|
|
else
|
|
aw_control_rst |= 0x8;
|
|
|
|
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
|
|
aw_control_rst &= ~0x2;
|
|
else
|
|
aw_control_rst |= 0x2;
|
|
|
|
amt_jtagaccel_reset(0, 0);
|
|
|
|
/* read status register */
|
|
AMT_AR(ar_status);
|
|
LOG_DEBUG("AR_STATUS: 0x%2.2x", ar_status);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int amt_jtagaccel_quit(void)
|
|
{
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(amt_jtagaccel_handle_parport_port_command)
|
|
{
|
|
if (CMD_ARGC == 1) {
|
|
/* only if the port wasn't overwritten by cmdline */
|
|
if (amt_jtagaccel_port == 0) {
|
|
uint16_t port;
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
|
|
amt_jtagaccel_port = port;
|
|
} else {
|
|
LOG_ERROR("The parport port was already configured!");
|
|
return ERROR_FAIL;
|
|
}
|
|
}
|
|
|
|
command_print(CMD_CTX, "parport port = %u", amt_jtagaccel_port);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(amt_jtagaccel_handle_rtck_command)
|
|
{
|
|
if (CMD_ARGC == 0) {
|
|
command_print(CMD_CTX,
|
|
"amt_jtagaccel RTCK feature %s",
|
|
(rtck_enabled) ? "enabled" : "disabled");
|
|
return ERROR_OK;
|
|
} else {
|
|
if (strcmp(CMD_ARGV[0], "enabled") == 0)
|
|
rtck_enabled = 1;
|
|
else
|
|
rtck_enabled = 0;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static const struct command_registration amtjtagaccel_command_handlers[] = {
|
|
{
|
|
.name = "parport_port",
|
|
.handler = &amt_jtagaccel_handle_parport_port_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "configure or display the parallel port to use",
|
|
.usage = "[port_num]",
|
|
},
|
|
{
|
|
/**
|
|
* @todo Remove this "rtck" command; just use the standard
|
|
* mechanism to enable/disable adaptive clocking. First
|
|
* implement the standard mechanism and deprecate "rtck";
|
|
* after a year or so, it'll be safe to remove this.
|
|
*/
|
|
.name = "rtck",
|
|
.handler = &amt_jtagaccel_handle_rtck_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "configure or display RTCK support",
|
|
.usage = "[enable|disable]",
|
|
},
|
|
COMMAND_REGISTRATION_DONE
|
|
};
|
|
|
|
struct jtag_interface amt_jtagaccel_interface = {
|
|
.name = "amt_jtagaccel",
|
|
.commands = amtjtagaccel_command_handlers,
|
|
|
|
.init = amt_jtagaccel_init,
|
|
.quit = amt_jtagaccel_quit,
|
|
.speed = amt_jtagaccel_speed,
|
|
.execute_queue = amt_jtagaccel_execute_queue,
|
|
};
|