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/************************************************************************** |
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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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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 <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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static char *ftdi_device_desc; |
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static char *ftdi_serial; |
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static uint8_t ftdi_channel; |
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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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static uint16_t output; |
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static uint16_t direction; |
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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) |
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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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int retval; |
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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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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 ? output | s->oe_mask : output & ~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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retval = mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff); |
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if (retval == ERROR_OK) |
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retval = mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8); |
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if (retval != ERROR_OK) { |
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LOG_ERROR("couldn't initialize FTDI GPIO"); |
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return ERROR_JTAG_INIT_FAILED; |
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} |
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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 int 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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int 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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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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return mpsse_clock_tms_cs_out(mpsse_ctx, |
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(uint8_t *)&tms_bits, |
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0, |
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tms_count, |
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false, |
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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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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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*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 int ftdi_execute_runtest(struct jtag_command *cmd) |
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{ |
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int retval = ERROR_OK; |
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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 && retval == ERROR_OK) { |
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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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retval = mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, 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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return retval; |
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} |
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static int ftdi_execute_statemove(struct jtag_command *cmd) |
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{ |
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int retval = ERROR_OK; |
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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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return retval; |
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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 int 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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return 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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JTAG_MODE); |
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} |
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static int ftdi_execute_pathmove(struct jtag_command *cmd) |
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{ |
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int retval = ERROR_OK; |
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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-- && retval == ERROR_OK) { |
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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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retval = 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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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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return retval; |
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} |
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static int ftdi_execute_scan(struct jtag_command *cmd) |
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{ |
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int retval = ERROR_OK; |
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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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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) |
|
|
|
move_to_state(TAP_DRSHIFT); |
|
|
|
} |
|
|
|
|
|
|
|
ftdi_end_state(cmd->cmd.scan->end_state); |
|
|
|
|
|
|
|
struct scan_field *field = cmd->cmd.scan->fields; |
|
|
|
unsigned scan_size = 0; |
|
|
|
|
|
|
|
for (int i = 0; i < cmd->cmd.scan->num_fields; i++, field++) { |
|
|
|
scan_size += field->num_bits; |
|
|
|
DEBUG_JTAG_IO("%s%s field %d/%d %d bits", |
|
|
|
field->in_value ? "in" : "", |
|
|
|
field->out_value ? "out" : "", |
|
|
|
i, |
|
|
|
cmd->cmd.scan->num_fields, |
|
|
|
field->num_bits); |
|
|
|
|
|
|
|
if (i == cmd->cmd.scan->num_fields - 1 && tap_get_state() != tap_get_end_state()) { |
|
|
|
/* Last field, and we're leaving IRSHIFT/DRSHIFT. Clock last bit during tap |
|
|
|
*movement */ |
|
|
|
mpsse_clock_data(mpsse_ctx, |
|
|
|
field->out_value, |
|
|
|
0, |
|
|
|
field->in_value, |
|
|
|
0, |
|
|
|
field->num_bits - 1, |
|
|
|
JTAG_MODE); |
|
|
|
uint8_t last_bit = 0; |
|
|
|
if (field->out_value) |
|
|
|
bit_copy(&last_bit, 0, field->out_value, field->num_bits - 1, 1); |
|
|
|
uint8_t tms_bits = 0x01; |
|
|
|
retval = mpsse_clock_tms_cs(mpsse_ctx, |
|
|
|
&tms_bits, |
|
|
|
0, |
|
|
|
field->in_value, |
|
|
|
field->num_bits - 1, |
|
|
|
1, |
|
|
|
last_bit, |
|
|
|
JTAG_MODE); |
|
|
|
tap_set_state(tap_state_transition(tap_get_state(), 1)); |
|
|
|
retval = mpsse_clock_tms_cs_out(mpsse_ctx, |
|
|
|
&tms_bits, |
|
|
|
1, |
|
|
|
1, |
|
|
|
last_bit, |
|
|
|
JTAG_MODE); |
|
|
|
tap_set_state(tap_state_transition(tap_get_state(), 0)); |
|
|
|
} else |
|
|
|
mpsse_clock_data(mpsse_ctx, |
|
|
|
field->out_value, |
|
|
|
0, |
|
|
|
field->in_value, |
|
|
|
0, |
|
|
|
field->num_bits, |
|
|
|
JTAG_MODE); |
|
|
|
if (retval != ERROR_OK) { |
|
|
|
LOG_ERROR("failed to add field %d in scan", i); |
|
|
|
return retval; |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
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())); |
|
|
|
return retval; |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
static int 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 (trst && cmd->cmd.reset->trst == 1) { |
|
|
|
ftdi_set_signal(trst, '0'); |
|
|
|
} else if (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 (srst && cmd->cmd.reset->srst == 1) { |
|
|
|
ftdi_set_signal(srst, '0'); |
|
|
|
} else if (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); |
|
|
|
return ERROR_OK; |
|
|
|
} |
|
|
|
|
|
|
|
static int ftdi_execute_sleep(struct jtag_command *cmd) |
|
|
|
{ |
|
|
|
int retval = ERROR_OK; |
|
|
|
|
|
|
|
DEBUG_JTAG_IO("sleep %" PRIi32, cmd->cmd.sleep->us); |
|
|
|
|
|
|
|
retval = 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())); |
|
|
|
return retval; |
|
|
|
} |
|
|
|
|
|
|
|
static int ftdi_execute_stableclocks(struct jtag_command *cmd) |
|
|
|
{ |
|
|
|
int retval = ERROR_OK; |
|
|
|
|
|
|
|
/* 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 && retval == ERROR_OK) { |
|
|
|
/* there are no state transitions in this code, so omit state tracking */ |
|
|
|
unsigned this_len = num_cycles > 7 ? 7 : num_cycles; |
|
|
|
retval = mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, 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())); |
|
|
|
return retval; |
|
|
|
} |
|
|
|
|
|
|
|
static int ftdi_execute_command(struct jtag_command *cmd) |
|
|
|
{ |
|
|
|
int retval; |
|
|
|
|
|
|
|
switch (cmd->type) { |
|
|
|
case JTAG_RESET: |
|
|
|
retval = ftdi_execute_reset(cmd); |
|
|
|
break; |
|
|
|
case JTAG_RUNTEST: |
|
|
|
retval = ftdi_execute_runtest(cmd); |
|
|
|
break; |
|
|
|
case JTAG_TLR_RESET: |
|
|
|
retval = ftdi_execute_statemove(cmd); |
|
|
|
break; |
|
|
|
case JTAG_PATHMOVE: |
|
|
|
retval = ftdi_execute_pathmove(cmd); |
|
|
|
break; |
|
|
|
case JTAG_SCAN: |
|
|
|
retval = ftdi_execute_scan(cmd); |
|
|
|
break; |
|
|
|
case JTAG_SLEEP: |
|
|
|
retval = ftdi_execute_sleep(cmd); |
|
|
|
break; |
|
|
|
case JTAG_STABLECLOCKS: |
|
|
|
retval = ftdi_execute_stableclocks(cmd); |
|
|
|
break; |
|
|
|
case JTAG_TMS: |
|
|
|
retval = ftdi_execute_tms(cmd); |
|
|
|
break; |
|
|
|
default: |
|
|
|
LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type); |
|
|
|
retval = ERROR_JTAG_QUEUE_FAILED; |
|
|
|
break; |
|
|
|
} |
|
|
|
return retval; |
|
|
|
} |
|
|
|
|
|
|
|
static int ftdi_execute_queue(void) |
|
|
|
{ |
|
|
|
int retval = ERROR_OK; |
|
|
|
|
|
|
|
/* 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 */ |
|
|
|
if (ftdi_execute_command(cmd) != ERROR_OK) |
|
|
|
retval = ERROR_JTAG_QUEUE_FAILED; |
|
|
|
} |
|
|
|
|
|
|
|
if (led) |
|
|
|
ftdi_set_signal(led, '0'); |
|
|
|
|
|
|
|
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) |
|
|
|
{ |
|
|
|
int retval; |
|
|
|
|
|
|
|
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_channel); |
|
|
|
if (mpsse_ctx) |
|
|
|
break; |
|
|
|
} |
|
|
|
|
|
|
|
if (!mpsse_ctx) |
|
|
|
return ERROR_JTAG_INIT_FAILED; |
|
|
|
|
|
|
|
retval = mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff); |
|
|
|
if (retval == ERROR_OK) |
|
|
|
retval = mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8); |
|
|
|
if (retval != ERROR_OK) { |
|
|
|
LOG_ERROR("couldn't initialize FTDI with 'JTAGkey' layout"); |
|
|
|
return ERROR_JTAG_INIT_FAILED; |
|
|
|
} |
|
|
|
|
|
|
|
retval = mpsse_loopback_config(mpsse_ctx, false); |
|
|
|
if (retval != ERROR_OK) { |
|
|
|
LOG_ERROR("couldn't write to FTDI to disable loopback"); |
|
|
|
return ERROR_JTAG_INIT_FAILED; |
|
|
|
} |
|
|
|
|
|
|
|
return mpsse_flush(mpsse_ctx); |
|
|
|
} |
|
|
|
|
|
|
|
static int ftdi_quit(void) |
|
|
|
{ |
|
|
|
mpsse_close(mpsse_ctx); |
|
|
|
|
|
|
|
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; |
|
|
|
} |
|
|
|
|
|
|
|
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], output); |
|
|
|
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], direction); |
|
|
|
|
|
|
|
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 { |
|
|
|
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; |
|
|
|
} |
|
|
|
|
|
|
|
static const struct command_registration ftdi_command_handlers[] = { |
|
|
|
{ |
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|
|
.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", |
|
|
|
}, |
|
|
|
{ |
|
|
|
.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]", |
|
|
|
}, |
|
|
|
{ |
|
|
|
.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)* ", |
|
|
|
}, |
|
|
|
COMMAND_REGISTRATION_DONE |
|
|
|
}; |
|
|
|
|
|
|
|
struct jtag_interface ftdi_interface = { |
|
|
|
.name = "ftdi", |
|
|
|
.supported = DEBUG_CAP_TMS_SEQ, |
|
|
|
.commands = ftdi_command_handlers, |
|
|
|
.transports = jtag_only, |
|
|
|
|
|
|
|
.init = ftdi_initialize, |
|
|
|
.quit = ftdi_quit, |
|
|
|
.speed = ftdi_speed, |
|
|
|
.speed_div = ftdi_speed_div, |
|
|
|
.khz = ftdi_khz, |
|
|
|
.execute_queue = ftdi_execute_queue, |
|
|
|
}; |