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openocd/src/jtag/drivers/vsllink.c

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/***************************************************************************
* Copyright (C) 2009-2010 by Simon Qian <SimonQian@SimonQian.com> *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
/* Versaloon is a programming tool for multiple MCUs.
* It's distributed under GPLv3.
* You can find it at http://www.Versaloon.com/.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <jtag/interface.h>
#include <jtag/commands.h>
#include <jtag/swd.h>
#include <libusb.h>
#include "versaloon/versaloon_include.h"
#include "versaloon/versaloon.h"
static int vsllink_tms_offset;
struct pending_scan_result {
int src_offset;
int dest_offset;
int length; /* Number of bits to read */
struct scan_command *command; /* Corresponding scan command */
uint8_t *ack;
uint8_t *buffer;
bool last; /* indicate the last scan pending */
};
#define MAX_PENDING_SCAN_RESULTS 256
static int pending_scan_results_length;
static struct pending_scan_result
pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
/* Queue command functions */
static void vsllink_end_state(tap_state_t state);
static void vsllink_state_move(void);
static void vsllink_path_move(int num_states, tap_state_t *path);
static void vsllink_tms(int num_bits, const uint8_t *bits);
static void vsllink_runtest(int num_cycles);
static void vsllink_stableclocks(int num_cycles, int tms);
static void vsllink_scan(bool ir_scan, enum scan_type type,
uint8_t *buffer, int scan_size, struct scan_command *command);
static void vsllink_reset(int trst, int srst);
/* VSLLink tap buffer functions */
static void vsllink_tap_append_step(int tms, int tdi);
static void vsllink_tap_init(void);
static int vsllink_tap_execute(void);
static void vsllink_tap_ensure_pending(int scans);
static void vsllink_tap_append_scan(int length, uint8_t *buffer,
struct scan_command *command);
/* VSLLink SWD functions */
static int_least32_t vsllink_swd_frequency(int_least32_t hz);
static int vsllink_swd_switch_seq(enum swd_special_seq seq);
/* VSLLink lowlevel functions */
struct vsllink {
struct libusb_context *libusb_ctx;
struct libusb_device_handle *usb_device_handle;
};
static int vsllink_usb_open(struct vsllink *vsllink);
static void vsllink_usb_close(struct vsllink *vsllink);
#if defined _DEBUG_JTAG_IO_
static void vsllink_debug_buffer(uint8_t *buffer, int length);
#endif
static int tap_length;
static int tap_buffer_size;
static uint8_t *tms_buffer;
static uint8_t *tdi_buffer;
static uint8_t *tdo_buffer;
static bool swd_mode;
static struct vsllink *vsllink_handle;
static int vsllink_execute_queue(void)
{
struct jtag_command *cmd = jtag_command_queue;
int scan_size;
enum scan_type type;
uint8_t *buffer;
DEBUG_JTAG_IO("-------------------------------------"
" vsllink "
"-------------------------------------");
while (cmd != NULL) {
switch (cmd->type) {
case JTAG_RUNTEST:
DEBUG_JTAG_IO("runtest %i cycles, end in %s",
cmd->cmd.runtest->num_cycles,
tap_state_name(cmd->cmd.runtest->end_state));
vsllink_end_state(cmd->cmd.runtest->end_state);
vsllink_runtest(cmd->cmd.runtest->num_cycles);
break;
case JTAG_TLR_RESET:
DEBUG_JTAG_IO("statemove end in %s",
tap_state_name(cmd->cmd.statemove->end_state));
vsllink_end_state(cmd->cmd.statemove->end_state);
vsllink_state_move();
break;
case JTAG_PATHMOVE:
DEBUG_JTAG_IO("pathmove: %i states, end in %s",
cmd->cmd.pathmove->num_states,
tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
vsllink_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
break;
case JTAG_SCAN:
DEBUG_JTAG_IO("JTAG Scan...");
vsllink_end_state(cmd->cmd.scan->end_state);
scan_size = jtag_build_buffer(
cmd->cmd.scan, &buffer);
if (cmd->cmd.scan->ir_scan)
DEBUG_JTAG_IO(
"JTAG Scan write IR(%d bits), "
"end in %s:",
scan_size,
tap_state_name(cmd->cmd.scan->end_state));
else
DEBUG_JTAG_IO(
"JTAG Scan write DR(%d bits), "
"end in %s:",
scan_size,
tap_state_name(cmd->cmd.scan->end_state));
#ifdef _DEBUG_JTAG_IO_
vsllink_debug_buffer(buffer,
DIV_ROUND_UP(scan_size, 8));
#endif
type = jtag_scan_type(cmd->cmd.scan);
vsllink_scan(cmd->cmd.scan->ir_scan,
type, buffer, scan_size,
cmd->cmd.scan);
break;
case JTAG_RESET:
DEBUG_JTAG_IO("reset trst: %i srst %i",
cmd->cmd.reset->trst,
cmd->cmd.reset->srst);
vsllink_tap_execute();
if (cmd->cmd.reset->trst == 1)
tap_set_state(TAP_RESET);
vsllink_reset(cmd->cmd.reset->trst,
cmd->cmd.reset->srst);
break;
case JTAG_SLEEP:
DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
vsllink_tap_execute();
jtag_sleep(cmd->cmd.sleep->us);
break;
case JTAG_STABLECLOCKS:
DEBUG_JTAG_IO("add %d clocks",
cmd->cmd.stableclocks->num_cycles);
switch (tap_get_state()) {
case TAP_RESET:
/* tms must be '1' to stay
* n TAP_RESET mode
*/
scan_size = 1;
break;
case TAP_DRSHIFT:
case TAP_IDLE:
case TAP_DRPAUSE:
case TAP_IRSHIFT:
case TAP_IRPAUSE:
/* else, tms should be '0' */
scan_size = 0;
break;
/* above stable states are OK */
default:
LOG_ERROR("jtag_add_clocks() "
"in non-stable state \"%s\"",
tap_state_name(tap_get_state())
);
exit(-1);
}
vsllink_stableclocks(cmd->cmd.stableclocks->num_cycles, scan_size);
break;
case JTAG_TMS:
DEBUG_JTAG_IO("add %d jtag tms",
cmd->cmd.tms->num_bits);
vsllink_tms(cmd->cmd.tms->num_bits, cmd->cmd.tms->bits);
break;
default:
LOG_ERROR("BUG: unknown JTAG command type "
"encountered: %d", cmd->type);
exit(-1);
}
cmd = cmd->next;
}
return vsllink_tap_execute();
}
static int vsllink_speed(int speed)
{
if (swd_mode) {
vsllink_swd_frequency(speed * 1000);
return ERROR_OK;
}
versaloon_interface.adaptors.jtag_raw.config(0, (uint16_t)speed);
return versaloon_interface.adaptors.peripheral_commit();
}
static int vsllink_khz(int khz, int *jtag_speed)
{
*jtag_speed = khz;
return ERROR_OK;
}
static int vsllink_speed_div(int jtag_speed, int *khz)
{
*khz = jtag_speed;
return ERROR_OK;
}
static void vsllink_free_buffer(void)
{
if (tdi_buffer != NULL) {
free(tdi_buffer);
tdi_buffer = NULL;
}
if (tdo_buffer != NULL) {
free(tdo_buffer);
tdo_buffer = NULL;
}
if (tms_buffer != NULL) {
free(tms_buffer);
tms_buffer = NULL;
}
}
static int vsllink_quit(void)
{
versaloon_interface.adaptors.gpio.config(0, GPIO_SRST | GPIO_TRST,
0, 0, GPIO_SRST | GPIO_TRST);
versaloon_interface.adaptors.gpio.fini(0);
if (swd_mode)
versaloon_interface.adaptors.swd.fini(0);
else
versaloon_interface.adaptors.jtag_raw.fini(0);
versaloon_interface.adaptors.peripheral_commit();
versaloon_interface.fini();
vsllink_free_buffer();
vsllink_usb_close(vsllink_handle);
free(vsllink_handle);
return ERROR_OK;
}
static int vsllink_interface_init(void)
{
vsllink_handle = malloc(sizeof(struct vsllink));
if (NULL == vsllink_handle) {
LOG_ERROR("unable to allocate memory");
return ERROR_FAIL;
}
libusb_init(&vsllink_handle->libusb_ctx);
if (ERROR_OK != vsllink_usb_open(vsllink_handle)) {
LOG_ERROR("Can't find USB JTAG Interface!" \
"Please check connection and permissions.");
return ERROR_JTAG_INIT_FAILED;
}
LOG_DEBUG("vsllink found on %04X:%04X",
versaloon_interface.usb_setting.vid,
versaloon_interface.usb_setting.pid);
versaloon_usb_device_handle = vsllink_handle->usb_device_handle;
if (ERROR_OK != versaloon_interface.init())
return ERROR_FAIL;
if (versaloon_interface.usb_setting.buf_size < 32) {
versaloon_interface.fini();
return ERROR_FAIL;
}
return ERROR_OK;
}
static int vsllink_init(void)
{
int retval = vsllink_interface_init();
if (ERROR_OK != retval)
return retval;
versaloon_interface.adaptors.gpio.init(0);
versaloon_interface.adaptors.gpio.config(0, GPIO_SRST, 0, GPIO_SRST,
GPIO_SRST);
versaloon_interface.adaptors.delay.delayms(100);
versaloon_interface.adaptors.peripheral_commit();
if (swd_mode) {
versaloon_interface.adaptors.gpio.config(0, GPIO_TRST, 0,
GPIO_TRST, GPIO_TRST);
versaloon_interface.adaptors.swd.init(0);
vsllink_swd_frequency(jtag_get_speed_khz() * 1000);
vsllink_swd_switch_seq(JTAG_TO_SWD);
} else {
/* malloc buffer size for tap */
tap_buffer_size = versaloon_interface.usb_setting.buf_size / 2 - 32;
vsllink_free_buffer();
tdi_buffer = malloc(tap_buffer_size);
tdo_buffer = malloc(tap_buffer_size);
tms_buffer = malloc(tap_buffer_size);
if ((NULL == tdi_buffer) || (NULL == tdo_buffer) || (NULL == tms_buffer)) {
vsllink_quit();
return ERROR_FAIL;
}
versaloon_interface.adaptors.jtag_raw.init(0);
versaloon_interface.adaptors.jtag_raw.config(0, jtag_get_speed_khz());
versaloon_interface.adaptors.gpio.config(0, GPIO_SRST | GPIO_TRST,
GPIO_TRST, GPIO_SRST, GPIO_SRST);
}
if (ERROR_OK != versaloon_interface.adaptors.peripheral_commit())
return ERROR_FAIL;
vsllink_reset(0, 0);
vsllink_tap_init();
return ERROR_OK;
}
/**************************************************************************
* Queue command implementations */
static void vsllink_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);
}
}
/* Goes to the end state. */
static void vsllink_state_move(void)
{
int i;
uint8_t tms_scan = tap_get_tms_path(tap_get_state(),
tap_get_end_state());
uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(),
tap_get_end_state());
for (i = 0; i < tms_scan_bits; i++)
vsllink_tap_append_step((tms_scan >> i) & 1, 0);
tap_set_state(tap_get_end_state());
}
static void vsllink_path_move(int num_states, tap_state_t *path)
{
for (int i = 0; i < num_states; i++) {
if (path[i] == tap_state_transition(tap_get_state(), false))
vsllink_tap_append_step(0, 0);
else if (path[i] == tap_state_transition(tap_get_state(), true))
vsllink_tap_append_step(1, 0);
else {
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
tap_state_name(tap_get_state()),
tap_state_name(path[i]));
exit(-1);
}
tap_set_state(path[i]);
}
tap_set_end_state(tap_get_state());
}
static void vsllink_tms(int num_bits, const uint8_t *bits)
{
for (int i = 0; i < num_bits; i++)
vsllink_tap_append_step((bits[i / 8] >> (i % 8)) & 1, 0);
}
static void vsllink_stableclocks(int num_cycles, int tms)
{
while (num_cycles > 0) {
vsllink_tap_append_step(tms, 0);
num_cycles--;
}
}
static void vsllink_runtest(int num_cycles)
{
tap_state_t saved_end_state = tap_get_end_state();
if (tap_get_state() != TAP_IDLE) {
/* enter IDLE state */
vsllink_end_state(TAP_IDLE);
vsllink_state_move();
}
vsllink_stableclocks(num_cycles, 0);
/* post-process */
/* set end_state */
vsllink_end_state(saved_end_state);
if (tap_get_end_state() != tap_get_end_state())
vsllink_state_move();
}
static void vsllink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
int scan_size, struct scan_command *command)
{
tap_state_t saved_end_state;
saved_end_state = tap_get_end_state();
/* Move to appropriate scan state */
vsllink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
if (tap_get_state() != tap_get_end_state())
vsllink_state_move();
vsllink_end_state(saved_end_state);
/* Scan */
vsllink_tap_append_scan(scan_size, buffer, command);
/* Goto Pause and record position to insert tms:0 */
vsllink_tap_append_step(0, 0);
vsllink_tms_offset = tap_length;
tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
if (tap_get_state() != tap_get_end_state())
vsllink_state_move();
}
static void vsllink_reset(int trst, int srst)
{
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
if (!srst)
versaloon_interface.adaptors.gpio.config(0, GPIO_SRST, 0, GPIO_SRST, GPIO_SRST);
else
versaloon_interface.adaptors.gpio.config(0, GPIO_SRST, GPIO_SRST, 0, 0);
if (!swd_mode) {
if (!trst)
versaloon_interface.adaptors.gpio.out(0, GPIO_TRST, GPIO_TRST);
else
versaloon_interface.adaptors.gpio.out(0, GPIO_TRST, 0);
}
versaloon_interface.adaptors.peripheral_commit();
}
COMMAND_HANDLER(vsllink_handle_usb_vid_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0],
versaloon_interface.usb_setting.vid);
return ERROR_OK;
}
COMMAND_HANDLER(vsllink_handle_usb_pid_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0],
versaloon_interface.usb_setting.pid);
return ERROR_OK;
}
COMMAND_HANDLER(vsllink_handle_usb_serial_command)
{
if (CMD_ARGC > 1)
return ERROR_COMMAND_SYNTAX_ERROR;
free(versaloon_interface.usb_setting.serialstring);
if (CMD_ARGC == 1)
versaloon_interface.usb_setting.serialstring = strdup(CMD_ARGV[0]);
else
versaloon_interface.usb_setting.serialstring = NULL;
return ERROR_OK;
}
COMMAND_HANDLER(vsllink_handle_usb_bulkin_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0],
versaloon_interface.usb_setting.ep_in);
versaloon_interface.usb_setting.ep_in |= 0x80;
return ERROR_OK;
}
COMMAND_HANDLER(vsllink_handle_usb_bulkout_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0],
versaloon_interface.usb_setting.ep_out);
versaloon_interface.usb_setting.ep_out &= ~0x80;
return ERROR_OK;
}
COMMAND_HANDLER(vsllink_handle_usb_interface_command)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0],
versaloon_interface.usb_setting.interface);
return ERROR_OK;
}
/**************************************************************************
* VSLLink tap functions */
static void vsllink_tap_init(void)
{
tap_length = 0;
pending_scan_results_length = 0;
vsllink_tms_offset = 0;
}
static void vsllink_tap_ensure_pending(int scans)
{
int available_scans =
MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
if (scans > available_scans)
vsllink_tap_execute();
}
static void vsllink_tap_append_step(int tms, int tdi)
{
int index_var = tap_length / 8;
int bit_index = tap_length % 8;
uint8_t bit = 1 << bit_index;
if (tms)
tms_buffer[index_var] |= bit;
else
tms_buffer[index_var] &= ~bit;
if (tdi)
tdi_buffer[index_var] |= bit;
else
tdi_buffer[index_var] &= ~bit;
tap_length++;
if (tap_buffer_size * 8 <= tap_length)
vsllink_tap_execute();
}
static void vsllink_tap_append_scan(int length, uint8_t *buffer,
struct scan_command *command)
{
struct pending_scan_result *pending_scan_result;
int len_tmp, len_all, i;
len_all = 0;
while (len_all < length) {
vsllink_tap_ensure_pending(1);
pending_scan_result =
&pending_scan_results_buffer[
pending_scan_results_length];
if ((length - len_all) > (tap_buffer_size * 8 - tap_length)) {
/* Use all memory available
vsllink_tap_append_step will commit automatically */
len_tmp = tap_buffer_size * 8 - tap_length;
pending_scan_result->last = false;
} else {
len_tmp = length - len_all;
pending_scan_result->last = true;
}
pending_scan_result->src_offset = tap_length;
pending_scan_result->dest_offset = len_all;
pending_scan_result->length = len_tmp;
pending_scan_result->command = command;
pending_scan_result->buffer = buffer;
pending_scan_results_length++;
for (i = 0; i < len_tmp; i++) {
vsllink_tap_append_step(((len_all + i) < length-1
? 0 : 1),
(buffer[(len_all + i)/8]
>> ((len_all + i)%8)) & 1);
}
len_all += len_tmp;
}
}
static int vsllink_jtag_execute(void)
{
int i;
int result;
if (tap_length <= 0)
return ERROR_OK;
versaloon_interface.adaptors.jtag_raw.execute(0, tdi_buffer, tms_buffer,
tdo_buffer, tap_length);
result = versaloon_interface.adaptors.peripheral_commit();
if (result == ERROR_OK) {
for (i = 0; i < pending_scan_results_length; i++) {
struct pending_scan_result *pending_scan_result =
&pending_scan_results_buffer[i];
uint8_t *buffer = pending_scan_result->buffer;
int length = pending_scan_result->length;
int src_first = pending_scan_result->src_offset;
int dest_first = pending_scan_result->dest_offset;
bool last = pending_scan_result->last;
struct scan_command *command;
command = pending_scan_result->command;
buf_set_buf(tdo_buffer, src_first, buffer, dest_first, length);
#ifdef _DEBUG_JTAG_IO_
DEBUG_JTAG_IO(
"JTAG scan read(%d bits, from src %d bits to dest %d bits):",
length, src_first, dest_first);
vsllink_debug_buffer(buffer + dest_first / 8,
DIV_ROUND_UP(length, 7));
#endif
if (last) {
if (jtag_read_buffer(buffer, command)
!= ERROR_OK) {
vsllink_tap_init();
return ERROR_JTAG_QUEUE_FAILED;
}
if (pending_scan_result->buffer != NULL)
free(pending_scan_result->buffer);
}
}
} else {
LOG_ERROR("vsllink_jtag_execute failure");
return ERROR_JTAG_QUEUE_FAILED;
}
vsllink_tap_init();
return ERROR_OK;
}
static int vsllink_tap_execute(void)
{
if (swd_mode)
return ERROR_OK;
return vsllink_jtag_execute();
}
static int vsllink_swd_init(void)
{
LOG_INFO("VSLLink SWD mode enabled");
swd_mode = true;
return ERROR_OK;
}
static int_least32_t vsllink_swd_frequency(int_least32_t hz)
{
const int_least32_t delay2hz[] = {
1850000, 235000, 130000, 102000, 85000, 72000
};
if (hz > 0) {
uint16_t delay = UINT16_MAX;
for (uint16_t i = 0; i < ARRAY_SIZE(delay2hz); i++) {
if (hz >= delay2hz[i]) {
hz = delay2hz[i];
delay = i;
break;
}
}
if (delay == UINT16_MAX)
delay = (500000 / hz) - 1;
/* Calculate retry count after a WAIT response. This will give
* a retry timeout at about ~250 ms. 54 is the number of bits
* found in a transaction. */
uint16_t retry_count = 250 * hz / 1000 / 54;
LOG_DEBUG("SWD delay: %d, retry count: %d", delay, retry_count);
versaloon_interface.adaptors.swd.config(0, 2, retry_count, delay);
}
return hz;
}
static int vsllink_swd_switch_seq(enum swd_special_seq seq)
{
switch (seq) {
case LINE_RESET:
LOG_DEBUG("SWD line reset");
versaloon_interface.adaptors.swd.seqout(0, swd_seq_line_reset,
swd_seq_line_reset_len);
break;
case JTAG_TO_SWD:
LOG_DEBUG("JTAG-to-SWD");
versaloon_interface.adaptors.swd.seqout(0, swd_seq_jtag_to_swd,
swd_seq_jtag_to_swd_len);
break;
case SWD_TO_JTAG:
LOG_DEBUG("SWD-to-JTAG");
versaloon_interface.adaptors.swd.seqout(0, swd_seq_swd_to_jtag,
swd_seq_swd_to_jtag_len);
break;
default:
LOG_ERROR("Sequence %d not supported", seq);
return ERROR_FAIL;
}
return ERROR_OK;
}
static void vsllink_swd_read_reg(uint8_t cmd, uint32_t *value, uint32_t ap_delay_clk)
{
versaloon_interface.adaptors.swd.transact(0, cmd, value, NULL);
}
static void vsllink_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk)
{
versaloon_interface.adaptors.swd.transact(0, cmd, &value, NULL);
}
static int vsllink_swd_run_queue(void)
{
return versaloon_interface.adaptors.peripheral_commit();
}
/****************************************************************************
* VSLLink USB low-level functions */
static int vsllink_check_usb_strings(
struct libusb_device_handle *usb_device_handle,
struct libusb_device_descriptor *usb_desc)
{
char desc_string[256];
int retval;
if (NULL != versaloon_interface.usb_setting.serialstring) {
retval = libusb_get_string_descriptor_ascii(usb_device_handle,
usb_desc->iSerialNumber, (unsigned char *)desc_string,
sizeof(desc_string));
if (retval < 0)
return ERROR_FAIL;
if (strncmp(desc_string, versaloon_interface.usb_setting.serialstring,
sizeof(desc_string)))
return ERROR_FAIL;
}
retval = libusb_get_string_descriptor_ascii(usb_device_handle,
usb_desc->iProduct, (unsigned char *)desc_string,
sizeof(desc_string));
if (retval < 0)
return ERROR_FAIL;
if (strstr(desc_string, "Versaloon") == NULL)
return ERROR_FAIL;
return ERROR_OK;
}
static int vsllink_usb_open(struct vsllink *vsllink)
{
ssize_t num_devices, i;
libusb_device **usb_devices;
struct libusb_device_descriptor usb_desc;
struct libusb_device_handle *usb_device_handle;
int retval;
num_devices = libusb_get_device_list(vsllink->libusb_ctx, &usb_devices);
if (num_devices <= 0)
return ERROR_FAIL;
for (i = 0; i < num_devices; i++) {
libusb_device *device = usb_devices[i];
retval = libusb_get_device_descriptor(device, &usb_desc);
if (retval != 0)
continue;
if (usb_desc.idVendor != versaloon_interface.usb_setting.vid ||
usb_desc.idProduct != versaloon_interface.usb_setting.pid)
continue;
retval = libusb_open(device, &usb_device_handle);
if (retval != 0)
continue;
retval = vsllink_check_usb_strings(usb_device_handle, &usb_desc);
if (ERROR_OK == retval)
break;
libusb_close(usb_device_handle);
}
libusb_free_device_list(usb_devices, 1);
if (i == num_devices)
return ERROR_FAIL;
retval = libusb_claim_interface(usb_device_handle,
versaloon_interface.usb_setting.interface);
if (retval != 0) {
LOG_ERROR("unable to claim interface");
libusb_close(usb_device_handle);
return ERROR_FAIL;
}
vsllink->usb_device_handle = usb_device_handle;
return ERROR_OK;
}
static void vsllink_usb_close(struct vsllink *vsllink)
{
libusb_release_interface(vsllink->usb_device_handle,
versaloon_interface.usb_setting.interface);
libusb_close(vsllink->usb_device_handle);
}
#define BYTES_PER_LINE 16
#if defined _DEBUG_JTAG_IO_
static void vsllink_debug_buffer(uint8_t *buffer, int length)
{
char line[81];
char s[4];
int i;
int j;
for (i = 0; i < length; i += BYTES_PER_LINE) {
snprintf(line, 5, "%04x", i);
for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
snprintf(s, 4, " %02x", buffer[j]);
strcat(line, s);
}
LOG_DEBUG("%s", line);
}
}
#endif /* _DEBUG_JTAG_IO_ */
static const struct command_registration vsllink_command_handlers[] = {
{
.name = "vsllink_usb_vid",
.handler = &vsllink_handle_usb_vid_command,
.mode = COMMAND_CONFIG,
},
{
.name = "vsllink_usb_pid",
.handler = &vsllink_handle_usb_pid_command,
.mode = COMMAND_CONFIG,
},
{
.name = "vsllink_usb_serial",
.handler = &vsllink_handle_usb_serial_command,
.mode = COMMAND_CONFIG,
},
{
.name = "vsllink_usb_bulkin",
.handler = &vsllink_handle_usb_bulkin_command,
.mode = COMMAND_CONFIG,
},
{
.name = "vsllink_usb_bulkout",
.handler = &vsllink_handle_usb_bulkout_command,
.mode = COMMAND_CONFIG,
},
{
.name = "vsllink_usb_interface",
.handler = &vsllink_handle_usb_interface_command,
.mode = COMMAND_CONFIG,
},
COMMAND_REGISTRATION_DONE
};
static const char * const vsllink_transports[] = {"jtag", "swd", NULL};
static const struct swd_driver vsllink_swd_driver = {
.init = vsllink_swd_init,
.frequency = vsllink_swd_frequency,
.switch_seq = vsllink_swd_switch_seq,
.read_reg = vsllink_swd_read_reg,
.write_reg = vsllink_swd_write_reg,
.run = vsllink_swd_run_queue,
};
struct jtag_interface vsllink_interface = {
.name = "vsllink",
.supported = DEBUG_CAP_TMS_SEQ,
.commands = vsllink_command_handlers,
.transports = vsllink_transports,
.swd = &vsllink_swd_driver,
.init = vsllink_init,
.quit = vsllink_quit,
.khz = vsllink_khz,
.speed = vsllink_speed,
.speed_div = vsllink_speed_div,
.execute_queue = vsllink_execute_queue,
};
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