604 lines
16 KiB
C
604 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/***************************************************************************
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* Copyright (C) 2007 by Benedikt Sauter *
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* sauter@ixbat.de *
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***************************************************************************/
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/*
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* This file is based on Dominic Rath's amt_jtagaccel.c.
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*
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* usbprog is a free programming adapter. You can easily install
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* different firmware versions from an "online pool" over USB.
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* The adapter can be used for programming and debugging AVR and ARM
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* processors, as USB to RS232 converter, as JTAG interface or as
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* simple I/O interface (5 lines).
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*
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* http://www.embedded-projects.net/usbprog
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <jtag/interface.h>
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#include <jtag/commands.h>
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#include "libusb_helper.h"
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#define VID 0x1781
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#define PID 0x0c63
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/* Pins at usbprog */
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#define TDO_BIT 0
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#define TDI_BIT 3
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#define TCK_BIT 2
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#define TMS_BIT 1
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static void usbprog_end_state(tap_state_t state);
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static void usbprog_state_move(void);
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static void usbprog_path_move(struct pathmove_command *cmd);
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static void usbprog_runtest(int num_cycles);
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static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size);
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#define UNKNOWN_COMMAND 0x00
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#define PORT_DIRECTION 0x01
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#define PORT_SET 0x02
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#define PORT_GET 0x03
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#define PORT_SETBIT 0x04
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#define PORT_GETBIT 0x05
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#define WRITE_TDI 0x06
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#define READ_TDO 0x07
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#define WRITE_AND_READ 0x08
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#define WRITE_TMS 0x09
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#define WRITE_TMS_CHAIN 0x0A
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struct usbprog_jtag {
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struct libusb_device_handle *usb_handle;
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};
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static struct usbprog_jtag *usbprog_jtag_handle;
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static struct usbprog_jtag *usbprog_jtag_open(void);
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/* static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag); */
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static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag);
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static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen);
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static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char *buffer, int size);
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static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char *buffer, int size);
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static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char *buffer, int size);
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static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan);
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static char tms_chain[64];
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static int tms_chain_index;
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static void usbprog_jtag_tms_collect(char tms_scan);
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static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag);
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static void usbprog_write(int tck, int tms, int tdi);
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static void usbprog_reset(int trst, int srst);
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static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction);
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static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag, unsigned char value);
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/* static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag); */
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static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag, int bit, int value);
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/* static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit); */
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static int usbprog_execute_queue(void)
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{
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struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
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int scan_size;
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enum scan_type type;
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uint8_t *buffer;
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while (cmd) {
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switch (cmd->type) {
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case JTAG_RESET:
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LOG_DEBUG_IO("reset trst: %i srst %i",
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cmd->cmd.reset->trst,
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cmd->cmd.reset->srst);
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if (cmd->cmd.reset->trst == 1)
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tap_set_state(TAP_RESET);
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usbprog_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
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break;
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case JTAG_RUNTEST:
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LOG_DEBUG_IO("runtest %i cycles, end in %i",
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cmd->cmd.runtest->num_cycles,
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cmd->cmd.runtest->end_state);
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usbprog_end_state(cmd->cmd.runtest->end_state);
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usbprog_runtest(cmd->cmd.runtest->num_cycles);
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break;
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case JTAG_TLR_RESET:
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LOG_DEBUG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
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usbprog_end_state(cmd->cmd.statemove->end_state);
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usbprog_state_move();
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break;
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case JTAG_PATHMOVE:
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LOG_DEBUG_IO("pathmove: %i states, end in %i",
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cmd->cmd.pathmove->num_states,
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cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
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usbprog_path_move(cmd->cmd.pathmove);
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break;
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case JTAG_SCAN:
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LOG_DEBUG_IO("scan end in %i", cmd->cmd.scan->end_state);
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usbprog_end_state(cmd->cmd.scan->end_state);
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scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
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type = jtag_scan_type(cmd->cmd.scan);
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usbprog_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
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if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
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return ERROR_JTAG_QUEUE_FAILED;
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free(buffer);
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break;
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case JTAG_SLEEP:
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LOG_DEBUG_IO("sleep %" PRIu32, cmd->cmd.sleep->us);
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jtag_sleep(cmd->cmd.sleep->us);
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break;
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default:
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LOG_ERROR("BUG: unknown JTAG command type encountered");
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exit(-1);
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}
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cmd = cmd->next;
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}
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return ERROR_OK;
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}
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static int usbprog_init(void)
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{
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usbprog_jtag_handle = usbprog_jtag_open();
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tms_chain_index = 0;
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if (usbprog_jtag_handle == 0) {
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LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
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return ERROR_JTAG_INIT_FAILED;
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}
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LOG_INFO("USB JTAG Interface ready!");
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usbprog_jtag_init(usbprog_jtag_handle);
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usbprog_reset(0, 0);
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usbprog_write(0, 0, 0);
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return ERROR_OK;
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}
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static int usbprog_quit(void)
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{
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return ERROR_OK;
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}
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/*************** jtag execute commands **********************/
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static void usbprog_end_state(tap_state_t state)
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{
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if (tap_is_state_stable(state))
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tap_set_end_state(state);
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else {
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LOG_ERROR("BUG: %i is not a valid end state", state);
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exit(-1);
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}
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}
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static void usbprog_state_move(void)
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{
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uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
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usbprog_jtag_write_tms(usbprog_jtag_handle, (char)tms_scan);
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tap_set_state(tap_get_end_state());
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}
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static void usbprog_path_move(struct pathmove_command *cmd)
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{
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int num_states = cmd->num_states;
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int state_count;
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/* There may be queued transitions, and before following a specified
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path, we must flush those queued transitions */
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usbprog_jtag_tms_send(usbprog_jtag_handle);
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state_count = 0;
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while (num_states) {
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if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count]) {
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/* LOG_INFO("1"); */
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usbprog_write(0, 0, 0);
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usbprog_write(1, 0, 0);
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} else if (tap_state_transition(tap_get_state(),
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true) == cmd->path[state_count]) {
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/* LOG_INFO("2"); */
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usbprog_write(0, 1, 0);
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usbprog_write(1, 1, 0);
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} else {
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LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
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tap_state_name(tap_get_state()),
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tap_state_name(cmd->path[state_count]));
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exit(-1);
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}
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tap_set_state(cmd->path[state_count]);
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state_count++;
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num_states--;
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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 usbprog_runtest(int num_cycles)
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{
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int i;
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/* only do a state_move when we're not already in IDLE */
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if (tap_get_state() != TAP_IDLE) {
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usbprog_end_state(TAP_IDLE);
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usbprog_state_move();
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}
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/* execute num_cycles */
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if (num_cycles > 0) {
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usbprog_jtag_tms_send(usbprog_jtag_handle);
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usbprog_write(0, 0, 0);
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} else {
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usbprog_jtag_tms_send(usbprog_jtag_handle);
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/* LOG_INFO("NUM CYCLES %i",num_cycles); */
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}
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for (i = 0; i < num_cycles; i++) {
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usbprog_write(1, 0, 0);
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usbprog_write(0, 0, 0);
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}
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LOG_DEBUG_IO("runtest: cur_state %s end_state %s", tap_state_name(
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tap_get_state()), tap_state_name(tap_get_end_state()));
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/* finish in end_state */
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/*
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usbprog_end_state(saved_end_state);
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if (tap_get_state() != tap_get_end_state())
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usbprog_state_move();
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*/
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}
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static void usbprog_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
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{
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tap_state_t saved_end_state = tap_get_end_state();
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if (ir_scan)
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usbprog_end_state(TAP_IRSHIFT);
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else
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usbprog_end_state(TAP_DRSHIFT);
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/* Only move if we're not already there */
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if (tap_get_state() != tap_get_end_state())
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usbprog_state_move();
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usbprog_end_state(saved_end_state);
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usbprog_jtag_tms_send(usbprog_jtag_handle);
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void (*f)(struct usbprog_jtag *usbprog_jtag, char *buffer_local, int size);
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switch (type) {
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case SCAN_OUT:
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f = &usbprog_jtag_write_tdi;
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break;
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case SCAN_IN:
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f = &usbprog_jtag_read_tdo;
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break;
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case SCAN_IO:
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f = &usbprog_jtag_write_and_read;
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break;
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default:
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LOG_ERROR("unknown scan type: %i", type);
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exit(-1);
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}
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f(usbprog_jtag_handle, (char *)buffer, scan_size);
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/* The adapter does the transition to PAUSE internally */
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if (ir_scan)
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tap_set_state(TAP_IRPAUSE);
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else
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tap_set_state(TAP_DRPAUSE);
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if (tap_get_state() != tap_get_end_state())
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usbprog_state_move();
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}
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/*************** jtag wrapper functions *********************/
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static void usbprog_write(int tck, int tms, int tdi)
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{
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unsigned char output_value = 0x00;
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if (tms)
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output_value |= (1 << TMS_BIT);
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if (tdi)
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output_value |= (1 << TDI_BIT);
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if (tck)
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output_value |= (1 << TCK_BIT);
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usbprog_jtag_write_slice(usbprog_jtag_handle, output_value);
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}
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/* (1) assert or (0) deassert reset lines */
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static void usbprog_reset(int trst, int srst)
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{
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LOG_DEBUG("trst: %i, srst: %i", trst, srst);
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if (trst)
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usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 0);
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else
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usbprog_jtag_set_bit(usbprog_jtag_handle, 5, 1);
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if (srst)
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usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 0);
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else
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usbprog_jtag_set_bit(usbprog_jtag_handle, 4, 1);
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}
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/*************** jtag lowlevel functions ********************/
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struct usb_bus *busses;
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struct usbprog_jtag *usbprog_jtag_open(void)
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{
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const uint16_t vids[] = { VID, 0 };
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const uint16_t pids[] = { PID, 0 };
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struct libusb_device_handle *dev;
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if (jtag_libusb_open(vids, pids, &dev, NULL) != ERROR_OK)
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return NULL;
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struct usbprog_jtag *tmp = malloc(sizeof(struct usbprog_jtag));
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tmp->usb_handle = dev;
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libusb_set_configuration(dev, 1);
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libusb_claim_interface(dev, 0);
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libusb_set_interface_alt_setting(dev, 0, 0);
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return tmp;
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}
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#if 0
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static void usbprog_jtag_close(struct usbprog_jtag *usbprog_jtag)
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{
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libusb_close(usbprog_jtag->usb_handle);
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free(usbprog_jtag);
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}
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#endif
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static unsigned char usbprog_jtag_message(struct usbprog_jtag *usbprog_jtag, char *msg, int msglen)
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{
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int transferred;
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int res = jtag_libusb_bulk_write(usbprog_jtag->usb_handle, 3, msg, msglen, 100, &transferred);
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if ((msg[0] == 2) || (msg[0] == 1) || (msg[0] == 4) || (msg[0] == 0) ||
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(msg[0] == 6) || (msg[0] == 0x0A) || (msg[0] == 9))
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return 1;
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if (res == ERROR_OK && transferred == msglen) {
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/* LOG_INFO("HALLLLOOO %i",(int)msg[0]); */
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res = jtag_libusb_bulk_read(usbprog_jtag->usb_handle, 0x82, msg, 2, 100, &transferred);
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if (res == ERROR_OK && transferred > 0)
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return (unsigned char)msg[1];
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else
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return -1;
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} else
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return -1;
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return 0;
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}
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static void usbprog_jtag_init(struct usbprog_jtag *usbprog_jtag)
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{
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usbprog_jtag_set_direction(usbprog_jtag, 0xFE);
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}
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static void usbprog_jtag_write_and_read(struct usbprog_jtag *usbprog_jtag, char *buffer, int size)
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{
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char tmp[64]; /* fastest packet size for usb controller */
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int send_bits, bufindex = 0, fillindex = 0, i, loops;
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char swap;
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/* 61 byte can be transferred (488 bit) */
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while (size > 0) {
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if (size > 488) {
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send_bits = 488;
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size = size - 488;
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loops = 61;
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} else {
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send_bits = size;
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loops = size / 8;
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loops++;
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size = 0;
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}
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tmp[0] = WRITE_AND_READ;
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tmp[1] = (char)(send_bits >> 8); /* high */
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tmp[2] = (char)(send_bits); /* low */
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for (i = 0; i < loops; i++) {
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tmp[3 + i] = buffer[bufindex];
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bufindex++;
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}
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int transferred;
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int res = jtag_libusb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000, &transferred);
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if (res == ERROR_OK && transferred == 64) {
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/* LOG_INFO("HALLLLOOO2 %i",(int)tmp[0]); */
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usleep(1);
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int timeout = 0;
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while (jtag_libusb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 1000, &transferred) != ERROR_OK) {
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timeout++;
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if (timeout > 10)
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break;
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}
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for (i = 0; i < loops; i++) {
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swap = tmp[3 + i];
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buffer[fillindex++] = swap;
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}
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}
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}
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}
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static void usbprog_jtag_read_tdo(struct usbprog_jtag *usbprog_jtag, char *buffer, int size)
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{
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char tmp[64]; /* fastest packet size for usb controller */
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int send_bits, fillindex = 0, i, loops;
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char swap;
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/* 61 byte can be transferred (488 bit) */
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while (size > 0) {
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if (size > 488) {
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send_bits = 488;
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size = size - 488;
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loops = 61;
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} else {
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send_bits = size;
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loops = size / 8;
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loops++;
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size = 0;
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}
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tmp[0] = WRITE_AND_READ;
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tmp[1] = (char)(send_bits >> 8); /* high */
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tmp[2] = (char)(send_bits); /* low */
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int transferred;
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jtag_libusb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 3, 1000, &transferred);
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/* LOG_INFO("HALLLLOOO3 %i",(int)tmp[0]); */
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int timeout = 0;
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usleep(1);
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while (jtag_libusb_bulk_read(usbprog_jtag->usb_handle, 0x82, tmp, 64, 10, &transferred) != ERROR_OK) {
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timeout++;
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if (timeout > 10)
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break;
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}
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for (i = 0; i < loops; i++) {
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swap = tmp[3 + i];
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buffer[fillindex++] = swap;
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}
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}
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}
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static void usbprog_jtag_write_tdi(struct usbprog_jtag *usbprog_jtag, char *buffer, int size)
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{
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char tmp[64]; /* fastest packet size for usb controller */
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int send_bits, bufindex = 0, i, loops;
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/* 61 byte can be transferred (488 bit) */
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while (size > 0) {
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if (size > 488) {
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send_bits = 488;
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size = size - 488;
|
|
loops = 61;
|
|
} else {
|
|
send_bits = size;
|
|
loops = size/8;
|
|
/* if (loops == 0) */
|
|
loops++;
|
|
size = 0;
|
|
}
|
|
tmp[0] = WRITE_TDI;
|
|
tmp[1] = (char)(send_bits >> 8); /* high */
|
|
tmp[2] = (char)(send_bits); /* low */
|
|
|
|
for (i = 0; i < loops; i++) {
|
|
tmp[3 + i] = buffer[bufindex];
|
|
bufindex++;
|
|
}
|
|
int transferred;
|
|
jtag_libusb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, 64, 1000, &transferred);
|
|
}
|
|
}
|
|
|
|
static void usbprog_jtag_write_tms(struct usbprog_jtag *usbprog_jtag, char tms_scan)
|
|
{
|
|
usbprog_jtag_tms_collect(tms_scan);
|
|
}
|
|
|
|
static void usbprog_jtag_set_direction(struct usbprog_jtag *usbprog_jtag, unsigned char direction)
|
|
{
|
|
char tmp[2];
|
|
tmp[0] = PORT_DIRECTION;
|
|
tmp[1] = (char)direction;
|
|
usbprog_jtag_message(usbprog_jtag, tmp, 2);
|
|
}
|
|
|
|
static void usbprog_jtag_write_slice(struct usbprog_jtag *usbprog_jtag, unsigned char value)
|
|
{
|
|
char tmp[2];
|
|
tmp[0] = PORT_SET;
|
|
tmp[1] = (char)value;
|
|
usbprog_jtag_message(usbprog_jtag, tmp, 2);
|
|
}
|
|
|
|
#if 0
|
|
static unsigned char usbprog_jtag_get_port(struct usbprog_jtag *usbprog_jtag)
|
|
{
|
|
char tmp[2];
|
|
tmp[0] = PORT_GET;
|
|
tmp[1] = 0x00;
|
|
return usbprog_jtag_message(usbprog_jtag, tmp, 2);
|
|
}
|
|
#endif
|
|
|
|
static void usbprog_jtag_set_bit(struct usbprog_jtag *usbprog_jtag, int bit, int value)
|
|
{
|
|
char tmp[3];
|
|
tmp[0] = PORT_SETBIT;
|
|
tmp[1] = (char)bit;
|
|
if (value == 1)
|
|
tmp[2] = 0x01;
|
|
else
|
|
tmp[2] = 0x00;
|
|
usbprog_jtag_message(usbprog_jtag, tmp, 3);
|
|
}
|
|
|
|
#if 0
|
|
static int usbprog_jtag_get_bit(struct usbprog_jtag *usbprog_jtag, int bit)
|
|
{
|
|
char tmp[2];
|
|
tmp[0] = PORT_GETBIT;
|
|
tmp[1] = (char)bit;
|
|
|
|
if (usbprog_jtag_message(usbprog_jtag, tmp, 2) > 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static void usbprog_jtag_tms_collect(char tms_scan)
|
|
{
|
|
tms_chain[tms_chain_index] = tms_scan;
|
|
tms_chain_index++;
|
|
}
|
|
|
|
static void usbprog_jtag_tms_send(struct usbprog_jtag *usbprog_jtag)
|
|
{
|
|
/* LOG_INFO("TMS SEND"); */
|
|
if (tms_chain_index > 0) {
|
|
char tmp[tms_chain_index + 2];
|
|
tmp[0] = WRITE_TMS_CHAIN;
|
|
tmp[1] = (char)(tms_chain_index);
|
|
for (int i = 0; i < tms_chain_index + 1; i++)
|
|
tmp[2 + i] = tms_chain[i];
|
|
int transferred;
|
|
jtag_libusb_bulk_write(usbprog_jtag->usb_handle, 3, tmp, tms_chain_index + 2, 1000, &transferred);
|
|
tms_chain_index = 0;
|
|
}
|
|
}
|
|
|
|
static struct jtag_interface usbprog_interface = {
|
|
.execute_queue = usbprog_execute_queue,
|
|
};
|
|
|
|
struct adapter_driver usbprog_adapter_driver = {
|
|
.name = "usbprog",
|
|
.transports = jtag_only,
|
|
|
|
.init = usbprog_init,
|
|
.quit = usbprog_quit,
|
|
|
|
.jtag_ops = &usbprog_interface,
|
|
};
|