702 lines
16 KiB
C
702 lines
16 KiB
C
/***************************************************************************
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* Copyright (C) 2012 by Jan Dakinevich *
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* jan.dakinevich@gmail.com *
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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 <helper/log.h>
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#include <helper/binarybuffer.h>
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#include <helper/command.h>
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#include <jtag/interface.h>
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#include "libusb_common.h"
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struct sequence {
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int len;
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void *tms;
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void *tdo;
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const void *tdi;
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struct sequence *next;
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};
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struct queue {
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struct sequence *head;
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struct sequence *tail;
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};
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static struct sequence *queue_add_tail(struct queue *queue, int len)
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{
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if (len <= 0) {
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LOG_ERROR("BUG: sequences with zero length are not allowed");
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return NULL;
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}
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struct sequence *next;
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next = malloc(sizeof(*next));
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if (next) {
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next->tms = calloc(1, DIV_ROUND_UP(len, 8));
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if (next->tms) {
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next->len = len;
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next->tdo = NULL;
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next->tdi = NULL;
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next->next = NULL;
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if (!queue->head) {
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/* Queue is empty at the moment */
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queue->head = next;
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} else {
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/* Queue already contains at least one sequence */
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queue->tail->next = next;
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}
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queue->tail = next;
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} else {
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free(next);
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next = NULL;
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}
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}
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if (!next)
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LOG_ERROR("Not enough memory");
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return next;
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}
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static void queue_drop_head(struct queue *queue)
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{
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struct sequence *head = queue->head->next; /* New head */
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free(queue->head->tms);
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free(queue->head);
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queue->head = head;
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}
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static void queue_free(struct queue *queue)
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{
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if (queue) {
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while (queue->head)
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queue_drop_head(queue);
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free(queue);
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}
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}
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static struct queue *queue_alloc(void)
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{
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struct queue *queue = malloc(sizeof(*queue));
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if (queue)
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queue->head = NULL;
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else
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LOG_ERROR("Not enough memory");
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return queue;
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}
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/* Size of usb communication buffer */
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#define OSBDM_USB_BUFSIZE 64
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/* Timeout for USB transfer, ms */
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#define OSBDM_USB_TIMEOUT 1000
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/* Write end point */
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#define OSBDM_USB_EP_WRITE 0x01
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/* Read end point */
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#define OSBDM_USB_EP_READ 0x82
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/* Initialize OSBDM device */
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#define OSBDM_CMD_INIT 0x11
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/* Execute special, not-BDM command. But only this
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* command is used for JTAG operation */
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#define OSBDM_CMD_SPECIAL 0x27
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/* Execute JTAG swap (tms/tdi -> tdo) */
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#define OSBDM_CMD_SPECIAL_SWAP 0x05
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/* Reset control */
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#define OSBDM_CMD_SPECIAL_SRST 0x01
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/* Maximum bit-length in one swap */
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#define OSBDM_SWAP_MAX (((OSBDM_USB_BUFSIZE - 6) / 5) * 16)
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/* Lists of valid VID/PID pairs
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*/
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static const uint16_t osbdm_vid[] = { 0x15a2, 0x15a2, 0x15a2, 0 };
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static const uint16_t osbdm_pid[] = { 0x0042, 0x0058, 0x005e, 0 };
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struct osbdm {
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struct jtag_libusb_device_handle *devh; /* USB handle */
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uint8_t buffer[OSBDM_USB_BUFSIZE]; /* Data to send and receive */
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int count; /* Count data to send and to read */
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};
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/* osbdm instance
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*/
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static struct osbdm osbdm_context;
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static int osbdm_send_and_recv(struct osbdm *osbdm)
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{
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/* Send request */
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int count = jtag_libusb_bulk_write(osbdm->devh, OSBDM_USB_EP_WRITE,
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(char *)osbdm->buffer, osbdm->count, OSBDM_USB_TIMEOUT);
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if (count != osbdm->count) {
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LOG_ERROR("OSBDM communication error: can't write");
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return ERROR_FAIL;
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}
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/* Save command code for next checking */
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uint8_t cmd_saved = osbdm->buffer[0];
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/* Reading answer */
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osbdm->count = jtag_libusb_bulk_read(osbdm->devh, OSBDM_USB_EP_READ,
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(char *)osbdm->buffer, OSBDM_USB_BUFSIZE, OSBDM_USB_TIMEOUT);
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/* Now perform basic checks for data sent by BDM device
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*/
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if (osbdm->count < 0) {
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LOG_ERROR("OSBDM communication error: can't read");
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return ERROR_FAIL;
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}
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if (osbdm->count < 2) {
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LOG_ERROR("OSBDM communication error: reply too small");
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return ERROR_FAIL;
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}
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if (osbdm->count != osbdm->buffer[1]) {
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LOG_ERROR("OSBDM communication error: reply size mismatch");
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return ERROR_FAIL;
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}
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if (cmd_saved != osbdm->buffer[0]) {
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LOG_ERROR("OSBDM communication error: reply command mismatch");
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return ERROR_FAIL;
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}
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return ERROR_OK;
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}
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static int osbdm_srst(struct osbdm *osbdm, int srst)
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{
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osbdm->count = 0;
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(void)memset(osbdm->buffer, 0, OSBDM_USB_BUFSIZE);
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/* Composing request
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*/
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osbdm->buffer[osbdm->count++] = OSBDM_CMD_SPECIAL; /* Command */
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osbdm->buffer[osbdm->count++] = OSBDM_CMD_SPECIAL_SRST; /* Subcommand */
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/* Length in bytes - not used */
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osbdm->buffer[osbdm->count++] = 0;
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osbdm->buffer[osbdm->count++] = 0;
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/* SRST state */
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osbdm->buffer[osbdm->count++] = (srst ? 0 : 0x08);
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/* Sending data
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*/
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if (osbdm_send_and_recv(osbdm) != ERROR_OK)
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return ERROR_FAIL;
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return ERROR_OK;
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}
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static int osbdm_swap(struct osbdm *osbdm, void *tms, void *tdi,
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void *tdo, int length)
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{
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if (length > OSBDM_SWAP_MAX) {
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LOG_ERROR("BUG: bit sequence too long");
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return ERROR_FAIL;
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}
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if (length <= 0) {
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LOG_ERROR("BUG: bit sequence equal or less than 0");
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return ERROR_FAIL;
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}
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int swap_count = DIV_ROUND_UP(length, 16);
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/* cleanup */
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osbdm->count = 0;
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(void)memset(osbdm->buffer, 0, OSBDM_USB_BUFSIZE);
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/* Composing request
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*/
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osbdm->buffer[osbdm->count++] = OSBDM_CMD_SPECIAL; /* Command */
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osbdm->buffer[osbdm->count++] = OSBDM_CMD_SPECIAL_SWAP; /* Subcommand */
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/* Length in bytes - not used */
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osbdm->buffer[osbdm->count++] = 0;
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osbdm->buffer[osbdm->count++] = 0;
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/* Swap count */
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osbdm->buffer[osbdm->count++] = 0;
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osbdm->buffer[osbdm->count++] = (uint8_t)swap_count;
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for (int bit_idx = 0; bit_idx < length; ) {
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/* Bit count in swap */
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int bit_count = length - bit_idx;
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if (bit_count > 16)
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bit_count = 16;
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osbdm->buffer[osbdm->count++] = (uint8_t)bit_count;
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/* Copying TMS and TDI data to output buffer */
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uint32_t tms_data = buf_get_u32(tms, bit_idx, bit_count);
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uint32_t tdi_data = buf_get_u32(tdi, bit_idx, bit_count);
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osbdm->buffer[osbdm->count++] = (uint8_t)(tdi_data >> 8);
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osbdm->buffer[osbdm->count++] = (uint8_t)tdi_data;
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osbdm->buffer[osbdm->count++] = (uint8_t)(tms_data >> 8);
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osbdm->buffer[osbdm->count++] = (uint8_t)tms_data;
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/* Next bit offset */
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bit_idx += bit_count;
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}
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assert(osbdm->count <= OSBDM_USB_BUFSIZE);
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/* Sending data
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*/
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if (osbdm_send_and_recv(osbdm) != ERROR_OK)
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return ERROR_FAIL;
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/* Extra check
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*/
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if (((osbdm->buffer[2] << 8) | osbdm->buffer[3]) != 2 * swap_count) {
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LOG_ERROR("OSBDM communication error: invalid swap command reply");
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return ERROR_FAIL;
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}
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/* Copy TDO responce
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*/
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uint8_t *buffer = osbdm->buffer + 4;
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for (int bit_idx = 0; bit_idx < length; ) {
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int bit_count = length - bit_idx;
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if (bit_count > 16)
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bit_count = 16;
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/* Prepare data */
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uint32_t tdo_data = 0;
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tdo_data |= (*buffer++) << 8;
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tdo_data |= (*buffer++);
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tdo_data >>= (16 - bit_count);
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/* Copy TDO to return */
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buf_set_u32(tdo, bit_idx, bit_count, tdo_data);
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bit_idx += bit_count;
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}
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return ERROR_OK;
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}
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static int osbdm_flush(struct osbdm *osbdm, struct queue* queue)
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{
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uint8_t tms[DIV_ROUND_UP(OSBDM_SWAP_MAX, 8)];
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uint8_t tdi[DIV_ROUND_UP(OSBDM_SWAP_MAX, 8)];
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uint8_t tdo[DIV_ROUND_UP(OSBDM_SWAP_MAX, 8)];
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int seq_back_len = 0;
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while (queue->head) {
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(void)memset(tms, 0, sizeof(tms));
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(void)memset(tdi, 0, sizeof(tdi));
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(void)memset(tdo, 0, sizeof(tdo));
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int seq_len;
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int swap_len;
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struct sequence *seq;
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/* Copy from queue to tms/tdi streams
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*/
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seq = queue->head;
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seq_len = seq_back_len;
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swap_len = 0;
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while (seq && swap_len != OSBDM_SWAP_MAX) {
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/* Count bit for copy at this iteration.
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* len should fit into remaining space
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* in tms/tdo bitstreams
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*/
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int len = seq->len - seq_len;
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if (len > OSBDM_SWAP_MAX - swap_len)
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len = OSBDM_SWAP_MAX - swap_len;
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/* Set tms data */
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buf_set_buf(seq->tms, seq_len, tms, swap_len, len);
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/* Set tdi data if they exists */
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if (seq->tdi)
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buf_set_buf(seq->tdi, seq_len, tdi, swap_len, len);
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swap_len += len;
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seq_len += len;
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if (seq_len == seq->len) {
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seq = seq->next; /* Move to next sequence */
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seq_len = 0;
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}
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}
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if (osbdm_swap(osbdm, tms, tdi, tdo, swap_len))
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return ERROR_FAIL;
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/* Copy from tdo stream to queue
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*/
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for (int swap_back_len = 0; swap_back_len < swap_len; ) {
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int len = queue->head->len - seq_back_len;
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if (len > swap_len - swap_back_len)
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len = swap_len - swap_back_len;
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if (queue->head->tdo)
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buf_set_buf(tdo, swap_back_len, queue->head->tdo, seq_back_len, len);
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swap_back_len += len;
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seq_back_len += len;
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if (seq_back_len == queue->head->len) {
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queue_drop_head(queue);
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seq_back_len = 0;
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}
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}
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}
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return ERROR_OK;
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}
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/* Basic operation for opening USB device */
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static int osbdm_open(struct osbdm *osbdm)
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{
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(void)memset(osbdm, 0, sizeof(*osbdm));
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if (jtag_libusb_open(osbdm_vid, osbdm_pid, NULL, &osbdm->devh) != ERROR_OK)
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return ERROR_FAIL;
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if (jtag_libusb_claim_interface(osbdm->devh, 0) != ERROR_OK)
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return ERROR_FAIL;
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return ERROR_OK;
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}
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static int osbdm_quit(void)
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{
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jtag_libusb_close(osbdm_context.devh);
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return ERROR_OK;
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}
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static int osbdm_add_pathmove(
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struct queue *queue,
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tap_state_t *path,
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int num_states)
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{
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assert(num_states <= 32);
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struct sequence *next = queue_add_tail(queue, num_states);
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if (!next) {
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LOG_ERROR("BUG: can't allocate bit sequence");
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return ERROR_FAIL;
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}
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uint32_t tms = 0;
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for (int i = 0; i < num_states; i++) {
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if (tap_state_transition(tap_get_state(), 1) == path[i]) {
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tms |= (1 << i);
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} else if (tap_state_transition(tap_get_state(), 0) == path[i]) {
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tms &= ~(1 << i); /* This line not so needed */
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} else {
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LOG_ERROR("BUG: %s -> %s isn't a valid TAP state transition",
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tap_state_name(tap_get_state()),
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tap_state_name(path[i]));
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return ERROR_FAIL;
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}
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tap_set_state(path[i]);
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}
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buf_set_u32(next->tms, 0, num_states, tms);
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tap_set_end_state(tap_get_state());
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return ERROR_OK;
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}
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static int osbdm_add_statemove(
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struct queue *queue,
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tap_state_t new_state,
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int skip_first)
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{
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int len = 0;
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int tms = 0;
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tap_set_end_state(new_state);
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if (tap_get_end_state() == TAP_RESET) {
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/* Ignore current state */
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tms = 0xff;
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len = 5;
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} else if (tap_get_state() != tap_get_end_state()) {
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tms = tap_get_tms_path(tap_get_state(), new_state);
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len = tap_get_tms_path_len(tap_get_state(), new_state);
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}
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if (len && skip_first) {
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len--;
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tms >>= 1;
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}
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if (len) {
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struct sequence *next = queue_add_tail(queue, len);
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if (!next) {
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LOG_ERROR("BUG: can't allocate bit sequence");
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return ERROR_FAIL;
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}
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buf_set_u32(next->tms, 0, len, tms);
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}
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tap_set_state(tap_get_end_state());
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return ERROR_OK;
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}
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static int osbdm_add_stableclocks(
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struct queue *queue,
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int count)
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{
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if (!tap_is_state_stable(tap_get_state())) {
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LOG_ERROR("BUG: current state (%s) is not stable",
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tap_state_name(tap_get_state()));
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return ERROR_FAIL;
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}
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struct sequence *next = queue_add_tail(queue, count);
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if (!next) {
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LOG_ERROR("BUG: can't allocate bit sequence");
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return ERROR_FAIL;
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}
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if (tap_get_state() == TAP_RESET)
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(void)memset(next->tms, 0xff, DIV_ROUND_UP(count, 8));
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return ERROR_OK;
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}
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static int osbdm_add_tms(
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struct queue *queue,
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const uint8_t *tms,
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int num_bits)
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{
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struct sequence *next = queue_add_tail(queue, num_bits);
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if (!next) {
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LOG_ERROR("BUG: can't allocate bit sequence");
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return ERROR_FAIL;
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}
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buf_set_buf(tms, 0, next->tms, 0, num_bits);
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return ERROR_OK;
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}
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static int osbdm_add_scan(
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struct queue *queue,
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struct scan_field *fields,
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int num_fields,
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tap_state_t end_state,
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bool ir_scan)
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{
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/* Move to desired shift state */
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if (ir_scan) {
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if (tap_get_state() != TAP_IRSHIFT) {
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if (osbdm_add_statemove(queue, TAP_IRSHIFT, 0) != ERROR_OK)
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return ERROR_FAIL;
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}
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} else {
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if (tap_get_state() != TAP_DRSHIFT) {
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if (osbdm_add_statemove(queue, TAP_DRSHIFT, 0) != ERROR_OK)
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return ERROR_FAIL;
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}
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}
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/* Add scan */
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tap_set_end_state(end_state);
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for (int idx = 0; idx < num_fields; idx++) {
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struct sequence *next = queue_add_tail(queue, fields[idx].num_bits);
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if (!next) {
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LOG_ERROR("Can't allocate bit sequence");
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
(void)memset(next->tms, 0, DIV_ROUND_UP(fields[idx].num_bits, 8));
|
|
next->tdi = fields[idx].out_value;
|
|
next->tdo = fields[idx].in_value;
|
|
}
|
|
|
|
/* Move to end state
|
|
*/
|
|
if (tap_get_state() != tap_get_end_state()) {
|
|
/* Exit from IRSHIFT/DRSHIFT */
|
|
buf_set_u32(queue->tail->tms, queue->tail->len - 1, 1, 1);
|
|
|
|
/* Move with skip_first flag */
|
|
if (osbdm_add_statemove(queue, tap_get_end_state(), 1) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int osbdm_add_runtest(
|
|
struct queue *queue,
|
|
int num_cycles,
|
|
tap_state_t end_state)
|
|
{
|
|
if (osbdm_add_statemove(queue, TAP_IDLE, 0) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
|
|
if (osbdm_add_stableclocks(queue, num_cycles) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
|
|
if (osbdm_add_statemove(queue, end_state, 0) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int osbdm_execute_command(
|
|
struct osbdm *osbdm,
|
|
struct queue *queue,
|
|
struct jtag_command *cmd)
|
|
{
|
|
int retval = ERROR_OK;
|
|
|
|
switch (cmd->type) {
|
|
case JTAG_RESET:
|
|
if (cmd->cmd.reset->trst) {
|
|
LOG_ERROR("BUG: nTRST signal is not supported");
|
|
retval = ERROR_FAIL;
|
|
} else {
|
|
retval = osbdm_flush(osbdm, queue);
|
|
if (retval == ERROR_OK)
|
|
retval = osbdm_srst(osbdm, cmd->cmd.reset->srst);
|
|
}
|
|
break;
|
|
|
|
case JTAG_PATHMOVE:
|
|
retval = osbdm_add_pathmove(
|
|
queue,
|
|
cmd->cmd.pathmove->path,
|
|
cmd->cmd.pathmove->num_states);
|
|
break;
|
|
|
|
case JTAG_TLR_RESET:
|
|
retval = osbdm_add_statemove(
|
|
queue,
|
|
cmd->cmd.statemove->end_state,
|
|
0);
|
|
break;
|
|
|
|
case JTAG_STABLECLOCKS:
|
|
retval = osbdm_add_stableclocks(
|
|
queue,
|
|
cmd->cmd.stableclocks->num_cycles);
|
|
break;
|
|
|
|
case JTAG_TMS:
|
|
retval = osbdm_add_tms(
|
|
queue,
|
|
cmd->cmd.tms->bits,
|
|
cmd->cmd.tms->num_bits);
|
|
break;
|
|
|
|
case JTAG_SCAN:
|
|
retval = osbdm_add_scan(
|
|
queue,
|
|
cmd->cmd.scan->fields,
|
|
cmd->cmd.scan->num_fields,
|
|
cmd->cmd.scan->end_state,
|
|
cmd->cmd.scan->ir_scan);
|
|
break;
|
|
|
|
case JTAG_SLEEP:
|
|
retval = osbdm_flush(osbdm, queue);
|
|
if (retval == ERROR_OK)
|
|
jtag_sleep(cmd->cmd.sleep->us);
|
|
break;
|
|
|
|
case JTAG_RUNTEST:
|
|
retval = osbdm_add_runtest(
|
|
queue,
|
|
cmd->cmd.runtest->num_cycles,
|
|
cmd->cmd.runtest->end_state);
|
|
break;
|
|
|
|
default:
|
|
LOG_ERROR("BUG: unknown JTAG command type encountered");
|
|
retval = ERROR_FAIL;
|
|
break;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int osbdm_execute_queue(void)
|
|
{
|
|
int retval = ERROR_OK;
|
|
|
|
struct queue *queue = queue_alloc();
|
|
if (!queue) {
|
|
LOG_ERROR("BUG: can't allocate bit queue");
|
|
retval = ERROR_FAIL;
|
|
} else {
|
|
struct jtag_command *cmd = jtag_command_queue;
|
|
|
|
while (retval == ERROR_OK && cmd) {
|
|
retval = osbdm_execute_command(&osbdm_context, queue, cmd);
|
|
cmd = cmd->next;
|
|
}
|
|
|
|
if (retval == ERROR_OK)
|
|
retval = osbdm_flush(&osbdm_context, queue);
|
|
|
|
queue_free(queue);
|
|
}
|
|
|
|
if (retval != ERROR_OK) {
|
|
LOG_ERROR("FATAL: can't execute jtag command");
|
|
exit(-1);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int osbdm_init(void)
|
|
{
|
|
/* Open device */
|
|
if (osbdm_open(&osbdm_context) != ERROR_OK) {
|
|
LOG_ERROR("Can't open OSBDM device");
|
|
return ERROR_FAIL;
|
|
} else {
|
|
/* Device successfully opened */
|
|
LOG_DEBUG("OSBDM init");
|
|
}
|
|
|
|
/* Perform initialize command */
|
|
osbdm_context.count = 0;
|
|
osbdm_context.buffer[osbdm_context.count++] = OSBDM_CMD_INIT;
|
|
if (osbdm_send_and_recv(&osbdm_context) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
struct jtag_interface osbdm_interface = {
|
|
.name = "osbdm",
|
|
|
|
.transports = jtag_only,
|
|
.execute_queue = osbdm_execute_queue,
|
|
|
|
.init = osbdm_init,
|
|
.quit = osbdm_quit
|
|
};
|