1194 lines
32 KiB
C
1194 lines
32 KiB
C
/**************************************************************************
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* Copyright (C) 2012 by Andreas Fritiofson *
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* andreas.fritiofson@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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/**
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* @file
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* JTAG adapters based on the FT2232 full and high speed USB parts are
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* popular low cost JTAG debug solutions. Many FT2232 based JTAG adapters
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* are discrete, but development boards may integrate them as alternatives
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* to more capable (and expensive) third party JTAG pods.
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*
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* JTAG uses only one of the two communications channels ("MPSSE engines")
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* on these devices. Adapters based on FT4232 parts have four ports/channels
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* (A/B/C/D), instead of just two (A/B).
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*
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* Especially on development boards integrating one of these chips (as
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* opposed to discrete pods/dongles), the additional channels can be used
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* for a variety of purposes, but OpenOCD only uses one channel at a time.
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*
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* - As a USB-to-serial adapter for the target's console UART ...
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* which may be able to support ROM boot loaders that load initial
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* firmware images to flash (or SRAM).
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*
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* - On systems which support ARM's SWD in addition to JTAG, or instead
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* of it, that second port can be used for reading SWV/SWO trace data.
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*
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* - Additional JTAG links, e.g. to a CPLD or * FPGA.
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*
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* FT2232 based JTAG adapters are "dumb" not "smart", because most JTAG
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* request/response interactions involve round trips over the USB link.
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* A "smart" JTAG adapter has intelligence close to the scan chain, so it
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* can for example poll quickly for a status change (usually taking on the
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* order of microseconds not milliseconds) before beginning a queued
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* transaction which require the previous one to have completed.
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*
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* There are dozens of adapters of this type, differing in details which
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* this driver needs to understand. Those "layout" details are required
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* as part of FT2232 driver configuration.
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*
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* This code uses information contained in the MPSSE specification which was
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* found here:
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* http://www.ftdichip.com/Documents/AppNotes/AN2232C-01_MPSSE_Cmnd.pdf
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* Hereafter this is called the "MPSSE Spec".
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*
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* The datasheet for the ftdichip.com's FT2232D part is here:
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* http://www.ftdichip.com/Documents/DataSheets/DS_FT2232D.pdf
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*
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* Also note the issue with code 0x4b (clock data to TMS) noted in
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* http://developer.intra2net.com/mailarchive/html/libftdi/2009/msg00292.html
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* which can affect longer JTAG state paths.
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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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/* project specific includes */
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#include <jtag/interface.h>
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#include <jtag/swd.h>
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#include <transport/transport.h>
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#include <helper/time_support.h>
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#if IS_CYGWIN == 1
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#include <windows.h>
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#endif
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#include <assert.h>
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/* FTDI access library includes */
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#include "mpsse.h"
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#define JTAG_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
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#define JTAG_MODE_ALT (LSB_FIRST | NEG_EDGE_IN | NEG_EDGE_OUT)
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#define SWD_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
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static char *ftdi_device_desc;
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static char *ftdi_serial;
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static char *ftdi_location;
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static uint8_t ftdi_channel;
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static uint8_t ftdi_jtag_mode = JTAG_MODE;
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static bool swd_mode;
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#define MAX_USB_IDS 8
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/* vid = pid = 0 marks the end of the list */
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static uint16_t ftdi_vid[MAX_USB_IDS + 1] = { 0 };
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static uint16_t ftdi_pid[MAX_USB_IDS + 1] = { 0 };
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static struct mpsse_ctx *mpsse_ctx;
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struct signal {
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const char *name;
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uint16_t data_mask;
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uint16_t oe_mask;
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bool invert_data;
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bool invert_oe;
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struct signal *next;
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};
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static struct signal *signals;
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/* FIXME: Where to store per-instance data? We need an SWD context. */
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static struct swd_cmd_queue_entry {
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uint8_t cmd;
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uint32_t *dst;
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uint8_t trn_ack_data_parity_trn[DIV_ROUND_UP(4 + 3 + 32 + 1 + 4, 8)];
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} *swd_cmd_queue;
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static size_t swd_cmd_queue_length;
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static size_t swd_cmd_queue_alloced;
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static int queued_retval;
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static int freq;
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static uint16_t output;
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static uint16_t direction;
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static uint16_t jtag_output_init;
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static uint16_t jtag_direction_init;
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static int ftdi_swd_switch_seq(enum swd_special_seq seq);
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static struct signal *find_signal_by_name(const char *name)
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{
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for (struct signal *sig = signals; sig; sig = sig->next) {
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if (strcmp(name, sig->name) == 0)
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return sig;
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}
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return NULL;
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}
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static struct signal *create_signal(const char *name)
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{
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struct signal **psig = &signals;
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while (*psig)
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psig = &(*psig)->next;
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*psig = calloc(1, sizeof(**psig));
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if (*psig == NULL)
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return NULL;
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(*psig)->name = strdup(name);
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if ((*psig)->name == NULL) {
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free(*psig);
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*psig = NULL;
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}
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return *psig;
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}
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static int ftdi_set_signal(const struct signal *s, char value)
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{
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bool data;
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bool oe;
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if (s->data_mask == 0 && s->oe_mask == 0) {
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LOG_ERROR("interface doesn't provide signal '%s'", s->name);
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return ERROR_FAIL;
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}
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switch (value) {
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case '0':
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data = s->invert_data;
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oe = !s->invert_oe;
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break;
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case '1':
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if (s->data_mask == 0) {
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LOG_ERROR("interface can't drive '%s' high", s->name);
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return ERROR_FAIL;
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}
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data = !s->invert_data;
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oe = !s->invert_oe;
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break;
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case 'z':
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case 'Z':
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if (s->oe_mask == 0) {
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LOG_ERROR("interface can't tri-state '%s'", s->name);
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return ERROR_FAIL;
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}
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data = s->invert_data;
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oe = s->invert_oe;
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break;
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default:
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assert(0 && "invalid signal level specifier");
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return ERROR_FAIL;
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}
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uint16_t old_output = output;
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uint16_t old_direction = direction;
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output = data ? output | s->data_mask : output & ~s->data_mask;
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if (s->oe_mask == s->data_mask)
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direction = oe ? direction | s->oe_mask : direction & ~s->oe_mask;
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else
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output = oe ? output | s->oe_mask : output & ~s->oe_mask;
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if ((output & 0xff) != (old_output & 0xff) || (direction & 0xff) != (old_direction & 0xff))
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mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
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if ((output >> 8 != old_output >> 8) || (direction >> 8 != old_direction >> 8))
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mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
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return ERROR_OK;
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}
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/**
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* Function move_to_state
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* moves the TAP controller from the current state to a
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* \a goal_state through a path given by tap_get_tms_path(). State transition
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* logging is performed by delegation to clock_tms().
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*
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* @param goal_state is the destination state for the move.
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*/
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static void move_to_state(tap_state_t goal_state)
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{
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tap_state_t start_state = tap_get_state();
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/* goal_state is 1/2 of a tuple/pair of states which allow convenient
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lookup of the required TMS pattern to move to this state from the
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start state.
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*/
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/* do the 2 lookups */
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uint8_t tms_bits = tap_get_tms_path(start_state, goal_state);
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int tms_count = tap_get_tms_path_len(start_state, goal_state);
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assert(tms_count <= 8);
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DEBUG_JTAG_IO("start=%s goal=%s", tap_state_name(start_state), tap_state_name(goal_state));
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/* Track state transitions step by step */
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for (int i = 0; i < tms_count; i++)
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tap_set_state(tap_state_transition(tap_get_state(), (tms_bits >> i) & 1));
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mpsse_clock_tms_cs_out(mpsse_ctx,
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&tms_bits,
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0,
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tms_count,
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false,
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ftdi_jtag_mode);
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}
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static int ftdi_speed(int speed)
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{
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int retval;
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retval = mpsse_set_frequency(mpsse_ctx, speed);
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if (retval < 0) {
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LOG_ERROR("couldn't set FTDI TCK speed");
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return retval;
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}
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if (!swd_mode && speed >= 10000000 && ftdi_jtag_mode != JTAG_MODE_ALT)
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LOG_INFO("ftdi: if you experience problems at higher adapter clocks, try "
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"the command \"ftdi_tdo_sample_edge falling\"");
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return ERROR_OK;
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}
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static int ftdi_speed_div(int speed, int *khz)
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{
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*khz = speed / 1000;
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return ERROR_OK;
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}
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static int ftdi_khz(int khz, int *jtag_speed)
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{
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if (khz == 0 && !mpsse_is_high_speed(mpsse_ctx)) {
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LOG_DEBUG("RCLK not supported");
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return ERROR_FAIL;
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}
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*jtag_speed = khz * 1000;
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return ERROR_OK;
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}
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static void ftdi_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: %s is not a stable end state", tap_state_name(state));
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exit(-1);
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}
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}
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static void ftdi_execute_runtest(struct jtag_command *cmd)
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{
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int i;
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uint8_t zero = 0;
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DEBUG_JTAG_IO("runtest %i cycles, end in %s",
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cmd->cmd.runtest->num_cycles,
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tap_state_name(cmd->cmd.runtest->end_state));
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if (tap_get_state() != TAP_IDLE)
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move_to_state(TAP_IDLE);
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/* TODO: Reuse ftdi_execute_stableclocks */
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i = cmd->cmd.runtest->num_cycles;
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while (i > 0) {
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/* there are no state transitions in this code, so omit state tracking */
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unsigned this_len = i > 7 ? 7 : i;
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mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, ftdi_jtag_mode);
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i -= this_len;
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}
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ftdi_end_state(cmd->cmd.runtest->end_state);
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if (tap_get_state() != tap_get_end_state())
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move_to_state(tap_get_end_state());
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DEBUG_JTAG_IO("runtest: %i, end in %s",
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cmd->cmd.runtest->num_cycles,
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tap_state_name(tap_get_end_state()));
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}
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static void ftdi_execute_statemove(struct jtag_command *cmd)
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{
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DEBUG_JTAG_IO("statemove end in %s",
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tap_state_name(cmd->cmd.statemove->end_state));
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ftdi_end_state(cmd->cmd.statemove->end_state);
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/* shortest-path move to desired end state */
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if (tap_get_state() != tap_get_end_state() || tap_get_end_state() == TAP_RESET)
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move_to_state(tap_get_end_state());
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}
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/**
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* Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
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* (or SWD) state machine. REVISIT: Not the best method, perhaps.
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*/
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static void ftdi_execute_tms(struct jtag_command *cmd)
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{
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DEBUG_JTAG_IO("TMS: %d bits", cmd->cmd.tms->num_bits);
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/* TODO: Missing tap state tracking, also missing from ft2232.c! */
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mpsse_clock_tms_cs_out(mpsse_ctx,
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cmd->cmd.tms->bits,
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0,
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cmd->cmd.tms->num_bits,
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false,
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ftdi_jtag_mode);
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}
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static void ftdi_execute_pathmove(struct jtag_command *cmd)
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{
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tap_state_t *path = cmd->cmd.pathmove->path;
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int num_states = cmd->cmd.pathmove->num_states;
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DEBUG_JTAG_IO("pathmove: %i states, current: %s end: %s", num_states,
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tap_state_name(tap_get_state()),
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tap_state_name(path[num_states-1]));
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int state_count = 0;
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unsigned bit_count = 0;
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uint8_t tms_byte = 0;
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DEBUG_JTAG_IO("-");
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/* this loop verifies that the path is legal and logs each state in the path */
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while (num_states--) {
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/* either TMS=0 or TMS=1 must work ... */
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if (tap_state_transition(tap_get_state(), false)
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== path[state_count])
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buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
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else if (tap_state_transition(tap_get_state(), true)
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== path[state_count]) {
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buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
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/* ... or else the caller goofed BADLY */
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} else {
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LOG_ERROR("BUG: %s -> %s isn't a valid "
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"TAP state transition",
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tap_state_name(tap_get_state()),
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tap_state_name(path[state_count]));
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exit(-1);
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}
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tap_set_state(path[state_count]);
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state_count++;
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if (bit_count == 7 || num_states == 0) {
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mpsse_clock_tms_cs_out(mpsse_ctx,
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&tms_byte,
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0,
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bit_count,
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false,
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ftdi_jtag_mode);
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bit_count = 0;
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}
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}
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tap_set_end_state(tap_get_state());
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}
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static void ftdi_execute_scan(struct jtag_command *cmd)
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{
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DEBUG_JTAG_IO("%s type:%d", cmd->cmd.scan->ir_scan ? "IRSCAN" : "DRSCAN",
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jtag_scan_type(cmd->cmd.scan));
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/* Make sure there are no trailing fields with num_bits == 0, or the logic below will fail. */
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while (cmd->cmd.scan->num_fields > 0
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&& cmd->cmd.scan->fields[cmd->cmd.scan->num_fields - 1].num_bits == 0) {
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cmd->cmd.scan->num_fields--;
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LOG_DEBUG("discarding trailing empty field");
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}
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if (cmd->cmd.scan->num_fields == 0) {
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LOG_DEBUG("empty scan, doing nothing");
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return;
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}
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if (cmd->cmd.scan->ir_scan) {
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if (tap_get_state() != TAP_IRSHIFT)
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move_to_state(TAP_IRSHIFT);
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} else {
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if (tap_get_state() != TAP_DRSHIFT)
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move_to_state(TAP_DRSHIFT);
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}
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ftdi_end_state(cmd->cmd.scan->end_state);
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struct scan_field *field = cmd->cmd.scan->fields;
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unsigned scan_size = 0;
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for (int i = 0; i < cmd->cmd.scan->num_fields; i++, field++) {
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scan_size += field->num_bits;
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DEBUG_JTAG_IO("%s%s field %d/%d %d bits",
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field->in_value ? "in" : "",
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field->out_value ? "out" : "",
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i,
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cmd->cmd.scan->num_fields,
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field->num_bits);
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if (i == cmd->cmd.scan->num_fields - 1 && tap_get_state() != tap_get_end_state()) {
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/* Last field, and we're leaving IRSHIFT/DRSHIFT. Clock last bit during tap
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* movement. This last field can't have length zero, it was checked above. */
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mpsse_clock_data(mpsse_ctx,
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field->out_value,
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0,
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field->in_value,
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0,
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field->num_bits - 1,
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ftdi_jtag_mode);
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uint8_t last_bit = 0;
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if (field->out_value)
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bit_copy(&last_bit, 0, field->out_value, field->num_bits - 1, 1);
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uint8_t tms_bits = 0x01;
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mpsse_clock_tms_cs(mpsse_ctx,
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&tms_bits,
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0,
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field->in_value,
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field->num_bits - 1,
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1,
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last_bit,
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ftdi_jtag_mode);
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tap_set_state(tap_state_transition(tap_get_state(), 1));
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mpsse_clock_tms_cs_out(mpsse_ctx,
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&tms_bits,
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1,
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1,
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last_bit,
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ftdi_jtag_mode);
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tap_set_state(tap_state_transition(tap_get_state(), 0));
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} else
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mpsse_clock_data(mpsse_ctx,
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field->out_value,
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0,
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field->in_value,
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0,
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field->num_bits,
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ftdi_jtag_mode);
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}
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if (tap_get_state() != tap_get_end_state())
|
|
move_to_state(tap_get_end_state());
|
|
|
|
DEBUG_JTAG_IO("%s scan, %i bits, end in %s",
|
|
(cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
|
|
tap_state_name(tap_get_end_state()));
|
|
}
|
|
|
|
static void ftdi_execute_reset(struct jtag_command *cmd)
|
|
{
|
|
DEBUG_JTAG_IO("reset trst: %i srst %i",
|
|
cmd->cmd.reset->trst, cmd->cmd.reset->srst);
|
|
|
|
if (cmd->cmd.reset->trst == 1
|
|
|| (cmd->cmd.reset->srst
|
|
&& (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
|
|
tap_set_state(TAP_RESET);
|
|
|
|
struct signal *trst = find_signal_by_name("nTRST");
|
|
if (cmd->cmd.reset->trst == 1) {
|
|
if (trst)
|
|
ftdi_set_signal(trst, '0');
|
|
else
|
|
LOG_ERROR("Can't assert TRST: nTRST signal is not defined");
|
|
} else if (trst && jtag_get_reset_config() & RESET_HAS_TRST &&
|
|
cmd->cmd.reset->trst == 0) {
|
|
if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
|
|
ftdi_set_signal(trst, 'z');
|
|
else
|
|
ftdi_set_signal(trst, '1');
|
|
}
|
|
|
|
struct signal *srst = find_signal_by_name("nSRST");
|
|
if (cmd->cmd.reset->srst == 1) {
|
|
if (srst)
|
|
ftdi_set_signal(srst, '0');
|
|
else
|
|
LOG_ERROR("Can't assert SRST: nSRST signal is not defined");
|
|
} else if (srst && jtag_get_reset_config() & RESET_HAS_SRST &&
|
|
cmd->cmd.reset->srst == 0) {
|
|
if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
|
|
ftdi_set_signal(srst, '1');
|
|
else
|
|
ftdi_set_signal(srst, 'z');
|
|
}
|
|
|
|
DEBUG_JTAG_IO("trst: %i, srst: %i",
|
|
cmd->cmd.reset->trst, cmd->cmd.reset->srst);
|
|
}
|
|
|
|
static void ftdi_execute_sleep(struct jtag_command *cmd)
|
|
{
|
|
DEBUG_JTAG_IO("sleep %" PRIi32, cmd->cmd.sleep->us);
|
|
|
|
mpsse_flush(mpsse_ctx);
|
|
jtag_sleep(cmd->cmd.sleep->us);
|
|
DEBUG_JTAG_IO("sleep %" PRIi32 " usec while in %s",
|
|
cmd->cmd.sleep->us,
|
|
tap_state_name(tap_get_state()));
|
|
}
|
|
|
|
static void ftdi_execute_stableclocks(struct jtag_command *cmd)
|
|
{
|
|
/* this is only allowed while in a stable state. A check for a stable
|
|
* state was done in jtag_add_clocks()
|
|
*/
|
|
int num_cycles = cmd->cmd.stableclocks->num_cycles;
|
|
|
|
/* 7 bits of either ones or zeros. */
|
|
uint8_t tms = tap_get_state() == TAP_RESET ? 0x7f : 0x00;
|
|
|
|
/* TODO: Use mpsse_clock_data with in=out=0 for this, if TMS can be set to
|
|
* the correct level and remain there during the scan */
|
|
while (num_cycles > 0) {
|
|
/* there are no state transitions in this code, so omit state tracking */
|
|
unsigned this_len = num_cycles > 7 ? 7 : num_cycles;
|
|
mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, ftdi_jtag_mode);
|
|
num_cycles -= this_len;
|
|
}
|
|
|
|
DEBUG_JTAG_IO("clocks %i while in %s",
|
|
cmd->cmd.stableclocks->num_cycles,
|
|
tap_state_name(tap_get_state()));
|
|
}
|
|
|
|
static void ftdi_execute_command(struct jtag_command *cmd)
|
|
{
|
|
switch (cmd->type) {
|
|
case JTAG_RESET:
|
|
ftdi_execute_reset(cmd);
|
|
break;
|
|
case JTAG_RUNTEST:
|
|
ftdi_execute_runtest(cmd);
|
|
break;
|
|
case JTAG_TLR_RESET:
|
|
ftdi_execute_statemove(cmd);
|
|
break;
|
|
case JTAG_PATHMOVE:
|
|
ftdi_execute_pathmove(cmd);
|
|
break;
|
|
case JTAG_SCAN:
|
|
ftdi_execute_scan(cmd);
|
|
break;
|
|
case JTAG_SLEEP:
|
|
ftdi_execute_sleep(cmd);
|
|
break;
|
|
case JTAG_STABLECLOCKS:
|
|
ftdi_execute_stableclocks(cmd);
|
|
break;
|
|
case JTAG_TMS:
|
|
ftdi_execute_tms(cmd);
|
|
break;
|
|
default:
|
|
LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int ftdi_execute_queue(void)
|
|
{
|
|
/* blink, if the current layout has that feature */
|
|
struct signal *led = find_signal_by_name("LED");
|
|
if (led)
|
|
ftdi_set_signal(led, '1');
|
|
|
|
for (struct jtag_command *cmd = jtag_command_queue; cmd; cmd = cmd->next) {
|
|
/* fill the write buffer with the desired command */
|
|
ftdi_execute_command(cmd);
|
|
}
|
|
|
|
if (led)
|
|
ftdi_set_signal(led, '0');
|
|
|
|
int retval = mpsse_flush(mpsse_ctx);
|
|
if (retval != ERROR_OK)
|
|
LOG_ERROR("error while flushing MPSSE queue: %d", retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int ftdi_initialize(void)
|
|
{
|
|
if (tap_get_tms_path_len(TAP_IRPAUSE, TAP_IRPAUSE) == 7)
|
|
LOG_DEBUG("ftdi interface using 7 step jtag state transitions");
|
|
else
|
|
LOG_DEBUG("ftdi interface using shortest path jtag state transitions");
|
|
|
|
for (int i = 0; ftdi_vid[i] || ftdi_pid[i]; i++) {
|
|
mpsse_ctx = mpsse_open(&ftdi_vid[i], &ftdi_pid[i], ftdi_device_desc,
|
|
ftdi_serial, ftdi_location, ftdi_channel);
|
|
if (mpsse_ctx)
|
|
break;
|
|
}
|
|
|
|
if (!mpsse_ctx)
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
|
|
output = jtag_output_init;
|
|
direction = jtag_direction_init;
|
|
|
|
if (swd_mode) {
|
|
struct signal *sig = find_signal_by_name("SWD_EN");
|
|
if (!sig) {
|
|
LOG_ERROR("SWD mode is active but SWD_EN signal is not defined");
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
/* A dummy SWD_EN would have zero mask */
|
|
if (sig->data_mask)
|
|
ftdi_set_signal(sig, '1');
|
|
}
|
|
|
|
mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
|
|
mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
|
|
|
|
mpsse_loopback_config(mpsse_ctx, false);
|
|
|
|
freq = mpsse_set_frequency(mpsse_ctx, jtag_get_speed_khz() * 1000);
|
|
|
|
return mpsse_flush(mpsse_ctx);
|
|
}
|
|
|
|
static int ftdi_quit(void)
|
|
{
|
|
mpsse_close(mpsse_ctx);
|
|
|
|
free(swd_cmd_queue);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_device_desc_command)
|
|
{
|
|
if (CMD_ARGC == 1) {
|
|
if (ftdi_device_desc)
|
|
free(ftdi_device_desc);
|
|
ftdi_device_desc = strdup(CMD_ARGV[0]);
|
|
} else {
|
|
LOG_ERROR("expected exactly one argument to ftdi_device_desc <description>");
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_serial_command)
|
|
{
|
|
if (CMD_ARGC == 1) {
|
|
if (ftdi_serial)
|
|
free(ftdi_serial);
|
|
ftdi_serial = strdup(CMD_ARGV[0]);
|
|
} else {
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
|
|
COMMAND_HANDLER(ftdi_handle_location_command)
|
|
{
|
|
if (CMD_ARGC == 1) {
|
|
if (ftdi_location)
|
|
free(ftdi_location);
|
|
ftdi_location = strdup(CMD_ARGV[0]);
|
|
} else {
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
#endif
|
|
|
|
COMMAND_HANDLER(ftdi_handle_channel_command)
|
|
{
|
|
if (CMD_ARGC == 1)
|
|
COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0], ftdi_channel);
|
|
else
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_layout_init_command)
|
|
{
|
|
if (CMD_ARGC != 2)
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], jtag_output_init);
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], jtag_direction_init);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_layout_signal_command)
|
|
{
|
|
if (CMD_ARGC < 1)
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
|
|
bool invert_data = false;
|
|
uint16_t data_mask = 0;
|
|
bool invert_oe = false;
|
|
uint16_t oe_mask = 0;
|
|
for (unsigned i = 1; i < CMD_ARGC; i += 2) {
|
|
if (strcmp("-data", CMD_ARGV[i]) == 0) {
|
|
invert_data = false;
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
|
|
} else if (strcmp("-ndata", CMD_ARGV[i]) == 0) {
|
|
invert_data = true;
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], data_mask);
|
|
} else if (strcmp("-oe", CMD_ARGV[i]) == 0) {
|
|
invert_oe = false;
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
|
|
} else if (strcmp("-noe", CMD_ARGV[i]) == 0) {
|
|
invert_oe = true;
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
|
|
} else if (!strcmp("-alias", CMD_ARGV[i]) ||
|
|
!strcmp("-nalias", CMD_ARGV[i])) {
|
|
if (!strcmp("-nalias", CMD_ARGV[i]))
|
|
invert_data = true;
|
|
struct signal *sig = find_signal_by_name(CMD_ARGV[i + 1]);
|
|
if (!sig) {
|
|
LOG_ERROR("signal %s is not defined", CMD_ARGV[i + 1]);
|
|
return ERROR_FAIL;
|
|
}
|
|
data_mask = sig->data_mask;
|
|
oe_mask = sig->oe_mask;
|
|
invert_oe = sig->invert_oe;
|
|
invert_data ^= sig->invert_data;
|
|
} else {
|
|
LOG_ERROR("unknown option '%s'", CMD_ARGV[i]);
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
}
|
|
}
|
|
|
|
struct signal *sig;
|
|
sig = find_signal_by_name(CMD_ARGV[0]);
|
|
if (!sig)
|
|
sig = create_signal(CMD_ARGV[0]);
|
|
if (!sig) {
|
|
LOG_ERROR("failed to create signal %s", CMD_ARGV[0]);
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
sig->invert_data = invert_data;
|
|
sig->data_mask = data_mask;
|
|
sig->invert_oe = invert_oe;
|
|
sig->oe_mask = oe_mask;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_set_signal_command)
|
|
{
|
|
if (CMD_ARGC < 2)
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
|
|
struct signal *sig;
|
|
sig = find_signal_by_name(CMD_ARGV[0]);
|
|
if (!sig) {
|
|
LOG_ERROR("interface configuration doesn't define signal '%s'", CMD_ARGV[0]);
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
switch (*CMD_ARGV[1]) {
|
|
case '0':
|
|
case '1':
|
|
case 'z':
|
|
case 'Z':
|
|
/* single character level specifier only */
|
|
if (CMD_ARGV[1][1] == '\0') {
|
|
ftdi_set_signal(sig, *CMD_ARGV[1]);
|
|
break;
|
|
}
|
|
default:
|
|
LOG_ERROR("unknown signal level '%s', use 0, 1 or z", CMD_ARGV[1]);
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
}
|
|
|
|
return mpsse_flush(mpsse_ctx);
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_vid_pid_command)
|
|
{
|
|
if (CMD_ARGC > MAX_USB_IDS * 2) {
|
|
LOG_WARNING("ignoring extra IDs in ftdi_vid_pid "
|
|
"(maximum is %d pairs)", MAX_USB_IDS);
|
|
CMD_ARGC = MAX_USB_IDS * 2;
|
|
}
|
|
if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
|
|
LOG_WARNING("incomplete ftdi_vid_pid configuration directive");
|
|
if (CMD_ARGC < 2)
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
/* remove the incomplete trailing id */
|
|
CMD_ARGC -= 1;
|
|
}
|
|
|
|
unsigned i;
|
|
for (i = 0; i < CMD_ARGC; i += 2) {
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], ftdi_vid[i >> 1]);
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], ftdi_pid[i >> 1]);
|
|
}
|
|
|
|
/*
|
|
* Explicitly terminate, in case there are multiples instances of
|
|
* ftdi_vid_pid.
|
|
*/
|
|
ftdi_vid[i >> 1] = ftdi_pid[i >> 1] = 0;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
COMMAND_HANDLER(ftdi_handle_tdo_sample_edge_command)
|
|
{
|
|
Jim_Nvp *n;
|
|
static const Jim_Nvp nvp_ftdi_jtag_modes[] = {
|
|
{ .name = "rising", .value = JTAG_MODE },
|
|
{ .name = "falling", .value = JTAG_MODE_ALT },
|
|
{ .name = NULL, .value = -1 },
|
|
};
|
|
|
|
if (CMD_ARGC > 0) {
|
|
n = Jim_Nvp_name2value_simple(nvp_ftdi_jtag_modes, CMD_ARGV[0]);
|
|
if (n->name == NULL)
|
|
return ERROR_COMMAND_SYNTAX_ERROR;
|
|
ftdi_jtag_mode = n->value;
|
|
|
|
}
|
|
|
|
n = Jim_Nvp_value2name_simple(nvp_ftdi_jtag_modes, ftdi_jtag_mode);
|
|
command_print(CMD_CTX, "ftdi samples TDO on %s edge of TCK", n->name);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static const struct command_registration ftdi_command_handlers[] = {
|
|
{
|
|
.name = "ftdi_device_desc",
|
|
.handler = &ftdi_handle_device_desc_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "set the USB device description of the FTDI device",
|
|
.usage = "description_string",
|
|
},
|
|
{
|
|
.name = "ftdi_serial",
|
|
.handler = &ftdi_handle_serial_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "set the serial number of the FTDI device",
|
|
.usage = "serial_string",
|
|
},
|
|
#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
|
|
{
|
|
.name = "ftdi_location",
|
|
.handler = &ftdi_handle_location_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "set the USB bus location of the FTDI device",
|
|
.usage = "<bus>:port[,port]...",
|
|
},
|
|
#endif
|
|
{
|
|
.name = "ftdi_channel",
|
|
.handler = &ftdi_handle_channel_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "set the channel of the FTDI device that is used as JTAG",
|
|
.usage = "(0-3)",
|
|
},
|
|
{
|
|
.name = "ftdi_layout_init",
|
|
.handler = &ftdi_handle_layout_init_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "initialize the FTDI GPIO signals used "
|
|
"to control output-enables and reset signals",
|
|
.usage = "data direction",
|
|
},
|
|
{
|
|
.name = "ftdi_layout_signal",
|
|
.handler = &ftdi_handle_layout_signal_command,
|
|
.mode = COMMAND_ANY,
|
|
.help = "define a signal controlled by one or more FTDI GPIO as data "
|
|
"and/or output enable",
|
|
.usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask] [-alias|-nalias name]",
|
|
},
|
|
{
|
|
.name = "ftdi_set_signal",
|
|
.handler = &ftdi_handle_set_signal_command,
|
|
.mode = COMMAND_EXEC,
|
|
.help = "control a layout-specific signal",
|
|
.usage = "name (1|0|z)",
|
|
},
|
|
{
|
|
.name = "ftdi_vid_pid",
|
|
.handler = &ftdi_handle_vid_pid_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "the vendor ID and product ID of the FTDI device",
|
|
.usage = "(vid pid)* ",
|
|
},
|
|
{
|
|
.name = "ftdi_tdo_sample_edge",
|
|
.handler = &ftdi_handle_tdo_sample_edge_command,
|
|
.mode = COMMAND_ANY,
|
|
.help = "set which TCK clock edge is used for sampling TDO "
|
|
"- default is rising-edge (Setting to falling-edge may "
|
|
"allow signalling speed increase)",
|
|
.usage = "(rising|falling)",
|
|
},
|
|
COMMAND_REGISTRATION_DONE
|
|
};
|
|
|
|
static int create_default_signal(const char *name, uint16_t data_mask)
|
|
{
|
|
struct signal *sig = create_signal(name);
|
|
if (!sig) {
|
|
LOG_ERROR("failed to create signal %s", name);
|
|
return ERROR_FAIL;
|
|
}
|
|
sig->invert_data = false;
|
|
sig->data_mask = data_mask;
|
|
sig->invert_oe = false;
|
|
sig->oe_mask = 0;
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int create_signals(void)
|
|
{
|
|
if (create_default_signal("TCK", 0x01) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
if (create_default_signal("TDI", 0x02) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
if (create_default_signal("TDO", 0x04) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
if (create_default_signal("TMS", 0x08) != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int ftdi_swd_init(void)
|
|
{
|
|
LOG_INFO("FTDI SWD mode enabled");
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|
swd_mode = true;
|
|
|
|
if (create_signals() != ERROR_OK)
|
|
return ERROR_FAIL;
|
|
|
|
swd_cmd_queue_alloced = 10;
|
|
swd_cmd_queue = malloc(swd_cmd_queue_alloced * sizeof(*swd_cmd_queue));
|
|
|
|
return swd_cmd_queue != NULL ? ERROR_OK : ERROR_FAIL;
|
|
}
|
|
|
|
static void ftdi_swd_swdio_en(bool enable)
|
|
{
|
|
struct signal *oe = find_signal_by_name("SWDIO_OE");
|
|
if (oe)
|
|
ftdi_set_signal(oe, enable ? '1' : '0');
|
|
}
|
|
|
|
/**
|
|
* Flush the MPSSE queue and process the SWD transaction queue
|
|
* @param dap
|
|
* @return
|
|
*/
|
|
static int ftdi_swd_run_queue(void)
|
|
{
|
|
LOG_DEBUG("Executing %zu queued transactions", swd_cmd_queue_length);
|
|
int retval;
|
|
struct signal *led = find_signal_by_name("LED");
|
|
|
|
if (queued_retval != ERROR_OK) {
|
|
LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
|
|
goto skip;
|
|
}
|
|
|
|
/* A transaction must be followed by another transaction or at least 8 idle cycles to
|
|
* ensure that data is clocked through the AP. */
|
|
mpsse_clock_data_out(mpsse_ctx, NULL, 0, 8, SWD_MODE);
|
|
|
|
/* Terminate the "blink", if the current layout has that feature */
|
|
if (led)
|
|
ftdi_set_signal(led, '0');
|
|
|
|
queued_retval = mpsse_flush(mpsse_ctx);
|
|
if (queued_retval != ERROR_OK) {
|
|
LOG_ERROR("MPSSE failed");
|
|
goto skip;
|
|
}
|
|
|
|
for (size_t i = 0; i < swd_cmd_queue_length; i++) {
|
|
int ack = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1, 3);
|
|
|
|
LOG_DEBUG("%s %s %s reg %X = %08"PRIx32,
|
|
ack == SWD_ACK_OK ? "OK" : ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK",
|
|
swd_cmd_queue[i].cmd & SWD_CMD_APnDP ? "AP" : "DP",
|
|
swd_cmd_queue[i].cmd & SWD_CMD_RnW ? "read" : "write",
|
|
(swd_cmd_queue[i].cmd & SWD_CMD_A32) >> 1,
|
|
buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn,
|
|
1 + 3 + (swd_cmd_queue[i].cmd & SWD_CMD_RnW ? 0 : 1), 32));
|
|
|
|
if (ack != SWD_ACK_OK) {
|
|
queued_retval = ack == SWD_ACK_WAIT ? ERROR_WAIT : ERROR_FAIL;
|
|
goto skip;
|
|
|
|
} else if (swd_cmd_queue[i].cmd & SWD_CMD_RnW) {
|
|
uint32_t data = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3, 32);
|
|
int parity = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 32, 1);
|
|
|
|
if (parity != parity_u32(data)) {
|
|
LOG_ERROR("SWD Read data parity mismatch");
|
|
queued_retval = ERROR_FAIL;
|
|
goto skip;
|
|
}
|
|
|
|
if (swd_cmd_queue[i].dst != NULL)
|
|
*swd_cmd_queue[i].dst = data;
|
|
}
|
|
}
|
|
|
|
skip:
|
|
swd_cmd_queue_length = 0;
|
|
retval = queued_retval;
|
|
queued_retval = ERROR_OK;
|
|
|
|
/* Queue a new "blink" */
|
|
if (led && retval == ERROR_OK)
|
|
ftdi_set_signal(led, '1');
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void ftdi_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data, uint32_t ap_delay_clk)
|
|
{
|
|
if (swd_cmd_queue_length >= swd_cmd_queue_alloced) {
|
|
/* Not enough room in the queue. Run the queue and increase its size for next time.
|
|
* Note that it's not possible to avoid running the queue here, because mpsse contains
|
|
* pointers into the queue which may be invalid after the realloc. */
|
|
queued_retval = ftdi_swd_run_queue();
|
|
struct swd_cmd_queue_entry *q = realloc(swd_cmd_queue, swd_cmd_queue_alloced * 2 * sizeof(*swd_cmd_queue));
|
|
if (q != NULL) {
|
|
swd_cmd_queue = q;
|
|
swd_cmd_queue_alloced *= 2;
|
|
LOG_DEBUG("Increased SWD command queue to %zu elements", swd_cmd_queue_alloced);
|
|
}
|
|
}
|
|
|
|
if (queued_retval != ERROR_OK)
|
|
return;
|
|
|
|
size_t i = swd_cmd_queue_length++;
|
|
swd_cmd_queue[i].cmd = cmd | SWD_CMD_START | SWD_CMD_PARK;
|
|
|
|
mpsse_clock_data_out(mpsse_ctx, &swd_cmd_queue[i].cmd, 0, 8, SWD_MODE);
|
|
|
|
if (swd_cmd_queue[i].cmd & SWD_CMD_RnW) {
|
|
/* Queue a read transaction */
|
|
swd_cmd_queue[i].dst = dst;
|
|
|
|
ftdi_swd_swdio_en(false);
|
|
mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
|
|
0, 1 + 3 + 32 + 1 + 1, SWD_MODE);
|
|
ftdi_swd_swdio_en(true);
|
|
} else {
|
|
/* Queue a write transaction */
|
|
ftdi_swd_swdio_en(false);
|
|
|
|
mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
|
|
0, 1 + 3 + 1, SWD_MODE);
|
|
|
|
ftdi_swd_swdio_en(true);
|
|
|
|
buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1, 32, data);
|
|
buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1 + 32, 1, parity_u32(data));
|
|
|
|
mpsse_clock_data_out(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
|
|
1 + 3 + 1, 32 + 1, SWD_MODE);
|
|
}
|
|
|
|
/* Insert idle cycles after AP accesses to avoid WAIT */
|
|
if (cmd & SWD_CMD_APnDP)
|
|
mpsse_clock_data_out(mpsse_ctx, NULL, 0, ap_delay_clk, SWD_MODE);
|
|
|
|
}
|
|
|
|
static void ftdi_swd_read_reg(uint8_t cmd, uint32_t *value, uint32_t ap_delay_clk)
|
|
{
|
|
assert(cmd & SWD_CMD_RnW);
|
|
ftdi_swd_queue_cmd(cmd, value, 0, ap_delay_clk);
|
|
}
|
|
|
|
static void ftdi_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk)
|
|
{
|
|
assert(!(cmd & SWD_CMD_RnW));
|
|
ftdi_swd_queue_cmd(cmd, NULL, value, ap_delay_clk);
|
|
}
|
|
|
|
static int_least32_t ftdi_swd_frequency(int_least32_t hz)
|
|
{
|
|
if (hz > 0)
|
|
freq = mpsse_set_frequency(mpsse_ctx, hz);
|
|
|
|
return freq;
|
|
}
|
|
|
|
static int ftdi_swd_switch_seq(enum swd_special_seq seq)
|
|
{
|
|
switch (seq) {
|
|
case LINE_RESET:
|
|
LOG_DEBUG("SWD line reset");
|
|
mpsse_clock_data_out(mpsse_ctx, swd_seq_line_reset, 0, swd_seq_line_reset_len, SWD_MODE);
|
|
break;
|
|
case JTAG_TO_SWD:
|
|
LOG_DEBUG("JTAG-to-SWD");
|
|
mpsse_clock_data_out(mpsse_ctx, swd_seq_jtag_to_swd, 0, swd_seq_jtag_to_swd_len, SWD_MODE);
|
|
break;
|
|
case SWD_TO_JTAG:
|
|
LOG_DEBUG("SWD-to-JTAG");
|
|
mpsse_clock_data_out(mpsse_ctx, swd_seq_swd_to_jtag, 0, swd_seq_swd_to_jtag_len, SWD_MODE);
|
|
break;
|
|
default:
|
|
LOG_ERROR("Sequence %d not supported", seq);
|
|
return ERROR_FAIL;
|
|
}
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static const struct swd_driver ftdi_swd = {
|
|
.init = ftdi_swd_init,
|
|
.frequency = ftdi_swd_frequency,
|
|
.switch_seq = ftdi_swd_switch_seq,
|
|
.read_reg = ftdi_swd_read_reg,
|
|
.write_reg = ftdi_swd_write_reg,
|
|
.run = ftdi_swd_run_queue,
|
|
};
|
|
|
|
static const char * const ftdi_transports[] = { "jtag", "swd", NULL };
|
|
|
|
struct jtag_interface ftdi_interface = {
|
|
.name = "ftdi",
|
|
.supported = DEBUG_CAP_TMS_SEQ,
|
|
.commands = ftdi_command_handlers,
|
|
.transports = ftdi_transports,
|
|
.swd = &ftdi_swd,
|
|
|
|
.init = ftdi_initialize,
|
|
.quit = ftdi_quit,
|
|
.speed = ftdi_speed,
|
|
.speed_div = ftdi_speed_div,
|
|
.khz = ftdi_khz,
|
|
.execute_queue = ftdi_execute_queue,
|
|
};
|