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openocd/src/jtag/drivers/usbprog.c

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