970 lines
23 KiB
C
970 lines
23 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2010 by Michal Demin *
|
|
* based on usbprog.c and arm-jtag-ew.c *
|
|
* *
|
|
* 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., *
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
***************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <jtag/interface.h>
|
|
#include <jtag/commands.h>
|
|
|
|
#include <termios.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#undef DEBUG_SERIAL
|
|
/*#define DEBUG_SERIAL */
|
|
static int buspirate_execute_queue(void);
|
|
static int buspirate_speed(int speed);
|
|
static int buspirate_khz(int khz, int *jtag_speed);
|
|
static int buspirate_init(void);
|
|
static int buspirate_quit(void);
|
|
|
|
static void buspirate_end_state(tap_state_t state);
|
|
static void buspirate_state_move(void);
|
|
static void buspirate_path_move(int num_states, tap_state_t *path);
|
|
static void buspirate_runtest(int num_cycles);
|
|
static void buspirate_scan(bool ir_scan, enum scan_type type,
|
|
uint8_t *buffer, int scan_size, struct scan_command *command);
|
|
|
|
|
|
#define CMD_UNKOWN 0x00
|
|
#define CMD_PORT_MODE 0x01
|
|
#define CMD_FEATURE 0x02
|
|
#define CMD_READ_ADCS 0x03
|
|
/*#define CMD_TAP_SHIFT 0x04 // old protocol */
|
|
#define CMD_TAP_SHIFT 0x05
|
|
#define CMD_ENTER_OOCD 0x06
|
|
#define CMD_UART_SPEED 0x07
|
|
#define CMD_JTAG_SPEED 0x08
|
|
|
|
enum {
|
|
MODE_HIZ = 0,
|
|
MODE_JTAG = 1, /* push-pull outputs */
|
|
MODE_JTAG_OD = 2, /* open-drain outputs */
|
|
};
|
|
|
|
enum {
|
|
FEATURE_LED = 0x01,
|
|
FEATURE_VREG = 0x02,
|
|
FEATURE_TRST = 0x04,
|
|
FEATURE_SRST = 0x08,
|
|
FEATURE_PULLUP = 0x10
|
|
};
|
|
|
|
enum {
|
|
ACTION_DISABLE = 0,
|
|
ACTION_ENABLE = 1
|
|
};
|
|
|
|
enum {
|
|
SERIAL_NORMAL = 0,
|
|
SERIAL_FAST = 1
|
|
};
|
|
|
|
|
|
static int buspirate_fd = -1;
|
|
static int buspirate_pinmode = MODE_JTAG_OD;
|
|
static int buspirate_baudrate = SERIAL_NORMAL;
|
|
static int buspirate_vreg;
|
|
static int buspirate_pullup;
|
|
static char *buspirate_port;
|
|
|
|
|
|
/* TAP interface */
|
|
static void buspirate_tap_init(void);
|
|
static int buspirate_tap_execute(void);
|
|
static void buspirate_tap_append(int tms, int tdi);
|
|
static void buspirate_tap_append_scan(int length, uint8_t *buffer,
|
|
struct scan_command *command);
|
|
static void buspirate_tap_make_space(int scan, int bits);
|
|
|
|
static void buspirate_reset(int trst, int srst);
|
|
|
|
/* low level interface */
|
|
static void buspirate_jtag_reset(int);
|
|
static void buspirate_jtag_enable(int);
|
|
static unsigned char buspirate_jtag_command(int, char *, int);
|
|
static void buspirate_jtag_set_speed(int, char);
|
|
static void buspirate_jtag_set_mode(int, char);
|
|
static void buspirate_jtag_set_feature(int, char, char);
|
|
static void buspirate_jtag_get_adcs(int);
|
|
|
|
/* low level HW communication interface */
|
|
static int buspirate_serial_setspeed(int fd, speed_t speed);
|
|
static int buspirate_serial_write(int fd, char *buf, int size);
|
|
static int buspirate_serial_read(int fd, char *buf, int size);
|
|
static void buspirate_print_buffer(char *buf, int size);
|
|
|
|
static int buspirate_speed(int speed)
|
|
{
|
|
/* TODO */
|
|
LOG_INFO("Want to set speed to %dkHz, but not implemented yet", speed);
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int buspirate_khz(int khz, int *jtag_speed)
|
|
{
|
|
*jtag_speed = khz;
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int buspirate_execute_queue(void)
|
|
{
|
|
/* currently processed command */
|
|
struct jtag_command *cmd = jtag_command_queue;
|
|
int scan_size;
|
|
enum scan_type type;
|
|
uint8_t *buffer;
|
|
|
|
while (cmd) {
|
|
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));
|
|
buspirate_end_state(cmd->cmd.runtest
|
|
->end_state);
|
|
buspirate_runtest(cmd->cmd.runtest
|
|
->num_cycles);
|
|
break;
|
|
case JTAG_STATEMOVE:
|
|
DEBUG_JTAG_IO("statemove end in %s",
|
|
tap_state_name(cmd->cmd.statemove
|
|
->end_state));
|
|
buspirate_end_state(cmd->cmd.statemove
|
|
->end_state);
|
|
buspirate_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]));
|
|
buspirate_path_move(cmd->cmd.pathmove
|
|
->num_states,
|
|
cmd->cmd.pathmove->path);
|
|
break;
|
|
case JTAG_SCAN:
|
|
DEBUG_JTAG_IO("scan end in %s",
|
|
tap_state_name(cmd->cmd.scan
|
|
->end_state));
|
|
|
|
buspirate_end_state(cmd->cmd.scan
|
|
->end_state);
|
|
|
|
scan_size = jtag_build_buffer(cmd->cmd.scan,
|
|
&buffer);
|
|
type = jtag_scan_type(cmd->cmd.scan);
|
|
buspirate_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);
|
|
|
|
/* flush buffers, so we can reset */
|
|
buspirate_tap_execute();
|
|
|
|
if (cmd->cmd.reset->trst == 1)
|
|
tap_set_state(TAP_RESET);
|
|
buspirate_reset(cmd->cmd.reset->trst,
|
|
cmd->cmd.reset->srst);
|
|
break;
|
|
case JTAG_SLEEP:
|
|
DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
|
|
buspirate_tap_execute();
|
|
jtag_sleep(cmd->cmd.sleep->us);
|
|
break;
|
|
default:
|
|
LOG_ERROR("BUG: unknown JTAG command type encountered");
|
|
exit(-1);
|
|
}
|
|
|
|
cmd = cmd->next;
|
|
}
|
|
|
|
return buspirate_tap_execute();
|
|
}
|
|
|
|
static int buspirate_init(void)
|
|
{
|
|
if (buspirate_port == NULL) {
|
|
LOG_ERROR("You need to specify port !");
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
buspirate_fd = open(buspirate_port, O_RDWR | O_NOCTTY);
|
|
if (buspirate_fd == -1) {
|
|
LOG_ERROR("Could not open serial port.");
|
|
return ERROR_JTAG_INIT_FAILED;
|
|
}
|
|
|
|
buspirate_serial_setspeed(buspirate_fd, B115200);
|
|
|
|
buspirate_jtag_enable(buspirate_fd);
|
|
|
|
if (buspirate_baudrate != SERIAL_NORMAL)
|
|
buspirate_jtag_set_speed(buspirate_fd, SERIAL_FAST);
|
|
|
|
LOG_INFO("Buspirate Interface ready!");
|
|
|
|
buspirate_tap_init();
|
|
buspirate_jtag_set_mode(buspirate_fd, buspirate_pinmode);
|
|
buspirate_jtag_set_feature(buspirate_fd, FEATURE_VREG,
|
|
(buspirate_vreg == 1) ? ACTION_ENABLE : ACTION_DISABLE);
|
|
buspirate_jtag_set_feature(buspirate_fd, FEATURE_PULLUP,
|
|
(buspirate_pullup == 1) ? ACTION_ENABLE : ACTION_DISABLE);
|
|
buspirate_reset(0, 0);
|
|
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static int buspirate_quit(void)
|
|
{
|
|
LOG_INFO("Shuting down buspirate ");
|
|
buspirate_jtag_set_mode(buspirate_fd, MODE_HIZ);
|
|
|
|
buspirate_jtag_set_speed(buspirate_fd, SERIAL_NORMAL);
|
|
buspirate_jtag_reset(buspirate_fd);
|
|
if (buspirate_port) {
|
|
free(buspirate_port);
|
|
buspirate_port = NULL;
|
|
}
|
|
return ERROR_OK;
|
|
}
|
|
|
|
/* openocd command interface */
|
|
COMMAND_HANDLER(buspirate_handle_adc_command)
|
|
{
|
|
if (CMD_ARGC != 0) {
|
|
LOG_ERROR("usage: buspirate_adc");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (buspirate_fd == -1)
|
|
return ERROR_OK;
|
|
|
|
/* send the command */
|
|
buspirate_jtag_get_adcs(buspirate_fd);
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
COMMAND_HANDLER(buspirate_handle_vreg_command)
|
|
{
|
|
if (CMD_ARGC != 1) {
|
|
LOG_ERROR("usage: buspirate_vreg <1|0>");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (atoi(CMD_ARGV[0]) == 1)
|
|
buspirate_vreg = 1;
|
|
else
|
|
buspirate_vreg = 0;
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
COMMAND_HANDLER(buspirate_handle_pullup_command)
|
|
{
|
|
if (CMD_ARGC != 1) {
|
|
LOG_ERROR("usage: buspirate_pullup <1|0>");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (atoi(CMD_ARGV[0]) == 1)
|
|
buspirate_pullup = 1;
|
|
else
|
|
buspirate_pullup = 0;
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
COMMAND_HANDLER(buspirate_handle_led_command)
|
|
{
|
|
if (CMD_ARGC != 1) {
|
|
LOG_ERROR("usage: buspirate_led <1|0>");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (atoi(CMD_ARGV[0]) == 1) {
|
|
/* enable led */
|
|
buspirate_jtag_set_feature(buspirate_fd, FEATURE_LED,
|
|
ACTION_ENABLE);
|
|
} else {
|
|
/* disable led */
|
|
buspirate_jtag_set_feature(buspirate_fd, FEATURE_LED,
|
|
ACTION_DISABLE);
|
|
}
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
COMMAND_HANDLER(buspirate_handle_mode_command)
|
|
{
|
|
if (CMD_ARGC != 1) {
|
|
LOG_ERROR("usage: buspirate_mode <normal|open-drain>");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (CMD_ARGV[0][0] == 'n')
|
|
buspirate_pinmode = MODE_JTAG;
|
|
else if (CMD_ARGV[0][0] == 'o')
|
|
buspirate_pinmode = MODE_JTAG_OD;
|
|
else
|
|
LOG_ERROR("usage: buspirate_mode <normal|open-drain>");
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
COMMAND_HANDLER(buspirate_handle_speed_command)
|
|
{
|
|
if (CMD_ARGC != 1) {
|
|
LOG_ERROR("usage: buspirate_speed <normal|fast>");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (CMD_ARGV[0][0] == 'n')
|
|
buspirate_baudrate = SERIAL_NORMAL;
|
|
else if (CMD_ARGV[0][0] == 'f')
|
|
buspirate_baudrate = SERIAL_FAST;
|
|
else
|
|
LOG_ERROR("usage: buspirate_speed <normal|fast>");
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
COMMAND_HANDLER(buspirate_handle_port_command)
|
|
{
|
|
if (CMD_ARGC != 1) {
|
|
LOG_ERROR("usage: buspirate_port /dev/ttyUSB0");
|
|
return ERROR_OK;
|
|
}
|
|
|
|
if (buspirate_port == 0)
|
|
buspirate_port = strdup(CMD_ARGV[0]);
|
|
|
|
return ERROR_OK;
|
|
|
|
}
|
|
|
|
static const struct command_registration buspirate_command_handlers[] = {
|
|
{
|
|
.name = "buspirate_adc",
|
|
.handler = &buspirate_handle_adc_command,
|
|
.mode = COMMAND_EXEC,
|
|
.help = "reads voltages on adc pins",
|
|
},
|
|
{
|
|
.name = "buspirate_vreg",
|
|
.handler = &buspirate_handle_vreg_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "changes the state of voltage regulators",
|
|
},
|
|
{
|
|
.name = "buspirate_pullup",
|
|
.handler = &buspirate_handle_pullup_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "changes the state of pullup",
|
|
},
|
|
{
|
|
.name = "buspirate_led",
|
|
.handler = &buspirate_handle_led_command,
|
|
.mode = COMMAND_EXEC,
|
|
.help = "changes the state of led",
|
|
},
|
|
{
|
|
.name = "buspirate_speed",
|
|
.handler = &buspirate_handle_speed_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "speed of the interface",
|
|
},
|
|
{
|
|
.name = "buspirate_mode",
|
|
.handler = &buspirate_handle_mode_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "pin mode of the interface",
|
|
},
|
|
{
|
|
.name = "buspirate_port",
|
|
.handler = &buspirate_handle_port_command,
|
|
.mode = COMMAND_CONFIG,
|
|
.help = "name of the serial port to open",
|
|
},
|
|
COMMAND_REGISTRATION_DONE
|
|
};
|
|
|
|
struct jtag_interface buspirate_interface = {
|
|
.name = "buspirate",
|
|
.execute_queue = buspirate_execute_queue,
|
|
.speed = buspirate_speed,
|
|
.khz = buspirate_khz,
|
|
.commands = buspirate_command_handlers,
|
|
.init = buspirate_init,
|
|
.quit = buspirate_quit
|
|
};
|
|
|
|
/*************** jtag execute commands **********************/
|
|
static void buspirate_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 buspirate_state_move(void)
|
|
{
|
|
int i = 0, tms = 0;
|
|
uint8_t tms_scan = tap_get_tms_path(tap_get_state(),
|
|
tap_get_end_state());
|
|
int tms_count = tap_get_tms_path_len(tap_get_state(),
|
|
tap_get_end_state());
|
|
|
|
for (i = 0; i < tms_count; i++) {
|
|
tms = (tms_scan >> i) & 1;
|
|
buspirate_tap_append(tms, 0);
|
|
}
|
|
|
|
tap_set_state(tap_get_end_state());
|
|
}
|
|
|
|
static void buspirate_path_move(int num_states, tap_state_t *path)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < num_states; i++) {
|
|
if (tap_state_transition(tap_get_state(), false) == path[i]) {
|
|
buspirate_tap_append(0, 0);
|
|
} else if (tap_state_transition(tap_get_state(), true)
|
|
== path[i]) {
|
|
buspirate_tap_append(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 buspirate_runtest(int num_cycles)
|
|
{
|
|
int i;
|
|
|
|
tap_state_t saved_end_state = tap_get_end_state();
|
|
|
|
/* only do a state_move when we're not already in IDLE */
|
|
if (tap_get_state() != TAP_IDLE) {
|
|
buspirate_end_state(TAP_IDLE);
|
|
buspirate_state_move();
|
|
}
|
|
|
|
for (i = 0; i < num_cycles; i++)
|
|
buspirate_tap_append(0, 0);
|
|
|
|
DEBUG_JTAG_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 */
|
|
buspirate_end_state(saved_end_state);
|
|
if (tap_get_state() != tap_get_end_state())
|
|
buspirate_state_move();
|
|
}
|
|
|
|
static void buspirate_scan(bool ir_scan, enum scan_type type,
|
|
uint8_t *buffer, int scan_size, struct scan_command *command)
|
|
{
|
|
tap_state_t saved_end_state;
|
|
|
|
buspirate_tap_make_space(1, scan_size+8);
|
|
/* is 8 correct ? (2 moves = 16) */
|
|
|
|
saved_end_state = tap_get_end_state();
|
|
|
|
buspirate_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
|
|
buspirate_state_move();
|
|
|
|
buspirate_tap_append_scan(scan_size, buffer, command);
|
|
|
|
/* move to PAUSE */
|
|
buspirate_tap_append(0, 0);
|
|
|
|
/* restore the saved state */
|
|
buspirate_end_state(saved_end_state);
|
|
tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
|
|
|
|
if (tap_get_state() != tap_get_end_state())
|
|
buspirate_state_move();
|
|
}
|
|
|
|
|
|
/************************* TAP related stuff **********/
|
|
|
|
#define BUSPIRATE_BUFFER_SIZE 1024
|
|
#define BUSPIRATE_MAX_PENDING_SCANS 32
|
|
|
|
static char tms_chain[BUSPIRATE_BUFFER_SIZE]; /* send */
|
|
static char tdi_chain[BUSPIRATE_BUFFER_SIZE]; /* send */
|
|
static int tap_chain_index;
|
|
|
|
struct pending_scan_result /* this was stolen from arm-jtag-ew */
|
|
{
|
|
int first; /* First bit position in tdo_buffer to read */
|
|
int length; /* Number of bits to read */
|
|
struct scan_command *command; /* Corresponding scan command */
|
|
uint8_t *buffer;
|
|
};
|
|
|
|
static struct pending_scan_result
|
|
tap_pending_scans[BUSPIRATE_MAX_PENDING_SCANS];
|
|
static int tap_pending_scans_num;
|
|
|
|
static void buspirate_tap_init(void)
|
|
{
|
|
tap_chain_index = 0;
|
|
tap_pending_scans_num = 0;
|
|
}
|
|
|
|
static int buspirate_tap_execute(void)
|
|
{
|
|
char tmp[4096];
|
|
uint8_t *in_buf;
|
|
int i;
|
|
int fill_index = 0;
|
|
int ret;
|
|
int bytes_to_send;
|
|
|
|
if (tap_chain_index <= 0)
|
|
return ERROR_OK;
|
|
|
|
LOG_DEBUG("executing tap num bits = %i scans = %i",
|
|
tap_chain_index, tap_pending_scans_num);
|
|
|
|
bytes_to_send = (tap_chain_index+7) / 8;
|
|
|
|
tmp[0] = CMD_TAP_SHIFT; /* this command expects number of bits */
|
|
tmp[1] = (char)(tap_chain_index >> 8); /* high */
|
|
tmp[2] = (char)(tap_chain_index); /* low */
|
|
|
|
fill_index = 3;
|
|
for (i = 0; i < bytes_to_send; i++) {
|
|
tmp[fill_index] = tdi_chain[i];
|
|
fill_index++;
|
|
tmp[fill_index] = tms_chain[i];
|
|
fill_index++;
|
|
}
|
|
|
|
ret = buspirate_serial_write(buspirate_fd, tmp, 3 + bytes_to_send*2);
|
|
if (ret != bytes_to_send*2+3) {
|
|
LOG_ERROR("error writing :(");
|
|
return ERROR_JTAG_DEVICE_ERROR;
|
|
}
|
|
|
|
ret = buspirate_serial_read(buspirate_fd, tmp, bytes_to_send + 3);
|
|
in_buf = (uint8_t *)(&tmp[3]);
|
|
|
|
/* parse the scans */
|
|
for (i = 0; i < tap_pending_scans_num; i++) {
|
|
uint8_t *buffer = tap_pending_scans[i].buffer;
|
|
int length = tap_pending_scans[i].length;
|
|
int first = tap_pending_scans[i].first;
|
|
struct scan_command *command = tap_pending_scans[i].command;
|
|
|
|
/* copy bits from buffer */
|
|
buf_set_buf(in_buf, first, buffer, 0, length);
|
|
|
|
/* return buffer to higher level */
|
|
if (jtag_read_buffer(buffer, command) != ERROR_OK) {
|
|
buspirate_tap_init();
|
|
return ERROR_JTAG_QUEUE_FAILED;
|
|
}
|
|
|
|
free(buffer);
|
|
}
|
|
tap_pending_scans_num = 0;
|
|
tap_chain_index = 0;
|
|
return ERROR_OK;
|
|
}
|
|
|
|
static void buspirate_tap_make_space(int scans, int bits)
|
|
{
|
|
int have_scans = BUSPIRATE_MAX_PENDING_SCANS - tap_pending_scans_num;
|
|
int have_bits = BUSPIRATE_BUFFER_SIZE * 8 - tap_chain_index;
|
|
|
|
if ((have_scans < scans) || (have_bits < bits))
|
|
buspirate_tap_execute();
|
|
}
|
|
|
|
static void buspirate_tap_append(int tms, int tdi)
|
|
{
|
|
int index;
|
|
|
|
buspirate_tap_make_space(0, 1);
|
|
index = tap_chain_index / 8;
|
|
|
|
if (index < BUSPIRATE_BUFFER_SIZE) {
|
|
int bit_index = tap_chain_index % 8;
|
|
uint8_t bit = 1 << bit_index;
|
|
|
|
if (tms)
|
|
tms_chain[index] |= bit;
|
|
else
|
|
tms_chain[index] &= ~bit;
|
|
|
|
if (tdi)
|
|
tdi_chain[index] |= bit;
|
|
else
|
|
tdi_chain[index] &= ~bit;
|
|
|
|
tap_chain_index++;
|
|
} else
|
|
LOG_ERROR("tap_chain overflow, Bad things will happen");
|
|
|
|
}
|
|
|
|
static void buspirate_tap_append_scan(int length, uint8_t *buffer,
|
|
struct scan_command *command)
|
|
{
|
|
int i;
|
|
tap_pending_scans[tap_pending_scans_num].length = length;
|
|
tap_pending_scans[tap_pending_scans_num].buffer = buffer;
|
|
tap_pending_scans[tap_pending_scans_num].command = command;
|
|
tap_pending_scans[tap_pending_scans_num].first = tap_chain_index;
|
|
|
|
for (i = 0; i < length; i++) {
|
|
int tms = (i < length-1 ? 0 : 1);
|
|
int tdi = (buffer[i/8] >> (i%8)) & 1;
|
|
buspirate_tap_append(tms, tdi);
|
|
}
|
|
tap_pending_scans_num++;
|
|
}
|
|
|
|
/*************** jtag wrapper functions *********************/
|
|
|
|
/* (1) assert or (0) deassert reset lines */
|
|
static void buspirate_reset(int trst, int srst)
|
|
{
|
|
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
|
|
|
|
if (trst)
|
|
buspirate_jtag_set_feature(buspirate_fd,
|
|
FEATURE_TRST, ACTION_DISABLE);
|
|
else
|
|
buspirate_jtag_set_feature(buspirate_fd,
|
|
FEATURE_TRST, ACTION_ENABLE);
|
|
|
|
if (srst)
|
|
buspirate_jtag_set_feature(buspirate_fd,
|
|
FEATURE_SRST, ACTION_DISABLE);
|
|
else
|
|
buspirate_jtag_set_feature(buspirate_fd,
|
|
FEATURE_SRST, ACTION_ENABLE);
|
|
}
|
|
|
|
/*************** jtag lowlevel functions ********************/
|
|
static void buspirate_jtag_enable(int fd)
|
|
{
|
|
int ret;
|
|
char tmp[21] = { [0 ... 20] = 0x00 };
|
|
int done = 0;
|
|
int cmd_sent = 0;
|
|
|
|
LOG_DEBUG("Entering binary mode");
|
|
buspirate_serial_write(fd, tmp, 20);
|
|
usleep(10000);
|
|
|
|
/* reads 1 to n "BBIO1"s and one "OCD1" */
|
|
while (!done) {
|
|
ret = buspirate_serial_read(fd, tmp, 4);
|
|
if (ret != 4) {
|
|
LOG_ERROR("Buspirate did not respond :"
|
|
"( restart everything");
|
|
exit(-1);
|
|
}
|
|
LOG_DEBUG("TUI");
|
|
if (strncmp(tmp, "BBIO", 4) == 0) {
|
|
ret = buspirate_serial_read(fd, tmp, 1);
|
|
if (ret != 1) {
|
|
LOG_ERROR("Buspirate did not respond well :"
|
|
"( restart everything");
|
|
exit(-1);
|
|
}
|
|
if (tmp[0] != '1') {
|
|
LOG_ERROR("Unsupported binary protocol ");
|
|
exit(-1);
|
|
}
|
|
if (cmd_sent == 0) {
|
|
cmd_sent = 1;
|
|
tmp[0] = CMD_ENTER_OOCD;
|
|
ret = buspirate_serial_write(fd, tmp, 1);
|
|
}
|
|
} else if (strncmp(tmp, "OCD1", 4) == 0)
|
|
done = 1;
|
|
else {
|
|
LOG_ERROR("Buspirate did not respond :"
|
|
"( restart everything");
|
|
exit(-1);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
static void buspirate_jtag_reset(int fd)
|
|
{
|
|
int ret;
|
|
char tmp[5];
|
|
|
|
tmp[0] = 0x00; /* exit OCD1 mode */
|
|
buspirate_serial_write(fd, tmp, 1);
|
|
usleep(10000);
|
|
ret = buspirate_serial_read(fd, tmp, 5);
|
|
if (strncmp(tmp, "BBIO1", 5) == 0) {
|
|
tmp[0] = 0x0F; /* reset BP */
|
|
buspirate_serial_write(fd, tmp, 1);
|
|
} else
|
|
LOG_ERROR("Bad reply :( Please restart manually");
|
|
}
|
|
|
|
static void buspirate_jtag_set_speed(int fd, char speed)
|
|
{
|
|
int ret;
|
|
char tmp[2];
|
|
char ack[2];
|
|
speed_t baudrate = B115200;
|
|
|
|
ack[0] = 0xAA;
|
|
ack[1] = 0x55;
|
|
|
|
tmp[0] = CMD_UART_SPEED;
|
|
tmp[1] = speed;
|
|
buspirate_jtag_command(fd, tmp, 2);
|
|
|
|
/* here the adapter changes speed, we need follow */
|
|
if (speed == SERIAL_FAST)
|
|
baudrate = B1000000;
|
|
|
|
buspirate_serial_setspeed(fd, baudrate);
|
|
|
|
buspirate_serial_write(fd, ack, 2);
|
|
ret = buspirate_serial_read(fd, tmp, 2);
|
|
if (ret != 2) {
|
|
LOG_ERROR("Buspirate did not respond :"
|
|
"( restart everything");
|
|
exit(-1);
|
|
}
|
|
if ((tmp[0] != CMD_UART_SPEED) || (tmp[1] != speed)) {
|
|
LOG_ERROR("Buspirate didn't reply as expected :"
|
|
"( restart everything");
|
|
exit(-1);
|
|
}
|
|
LOG_INFO("Buspirate switched to %s mode",
|
|
(speed == SERIAL_NORMAL) ? "normal" : "FAST");
|
|
}
|
|
|
|
|
|
static void buspirate_jtag_set_mode(int fd, char mode)
|
|
{
|
|
char tmp[2];
|
|
tmp[0] = CMD_PORT_MODE;
|
|
tmp[1] = mode;
|
|
buspirate_jtag_command(fd, tmp, 2);
|
|
}
|
|
|
|
static void buspirate_jtag_set_feature(int fd, char feat, char action)
|
|
{
|
|
char tmp[3];
|
|
tmp[0] = CMD_FEATURE;
|
|
tmp[1] = feat; /* what */
|
|
tmp[2] = action; /* action */
|
|
buspirate_jtag_command(fd, tmp, 3);
|
|
}
|
|
|
|
static void buspirate_jtag_get_adcs(int fd)
|
|
{
|
|
uint8_t tmp[10];
|
|
uint16_t a, b, c, d;
|
|
tmp[0] = CMD_READ_ADCS;
|
|
buspirate_jtag_command(fd, (char *)tmp, 1);
|
|
a = tmp[2] << 8 | tmp[3];
|
|
b = tmp[4] << 8 | tmp[5];
|
|
c = tmp[6] << 8 | tmp[7];
|
|
d = tmp[8] << 8 | tmp[9];
|
|
|
|
LOG_INFO("ADC: ADC_Pin = %.02f VPullup = %.02f V33 = %.02f "
|
|
"V50 = %.02f",
|
|
((float)a)/155.1515, ((float)b)/155.1515,
|
|
((float)c)/155.1515, ((float)d)/155.1515);
|
|
}
|
|
|
|
static unsigned char buspirate_jtag_command(int buspirate_fd,
|
|
char *cmd, int cmdlen)
|
|
{
|
|
int res;
|
|
int len = 0;
|
|
|
|
res = buspirate_serial_write(buspirate_fd, cmd, cmdlen);
|
|
|
|
if ((cmd[0] == CMD_UART_SPEED)
|
|
|| (cmd[0] == CMD_PORT_MODE)
|
|
|| (cmd[0] == CMD_FEATURE)
|
|
|| (cmd[0] == CMD_JTAG_SPEED))
|
|
return 1;
|
|
|
|
if (res == cmdlen) {
|
|
switch (cmd[0]) {
|
|
case CMD_READ_ADCS:
|
|
len = 10; /* 2*sizeof(char)+4*sizeof(uint16_t) */
|
|
break;
|
|
case CMD_TAP_SHIFT:
|
|
len = cmdlen;
|
|
break;
|
|
default:
|
|
LOG_INFO("Wrong !");
|
|
}
|
|
res = buspirate_serial_read(buspirate_fd, cmd, len);
|
|
if (res > 0)
|
|
return (unsigned char)cmd[1];
|
|
else
|
|
return -1;
|
|
} else
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
/* low level serial port */
|
|
/* TODO add support for WIN32 and others ! */
|
|
static int buspirate_serial_setspeed(int fd, speed_t speed)
|
|
{
|
|
struct termios t_opt;
|
|
|
|
/* set the serial port parameters */
|
|
fcntl(buspirate_fd, F_SETFL, 0);
|
|
tcgetattr(buspirate_fd, &t_opt);
|
|
cfsetispeed(&t_opt, speed);
|
|
cfsetospeed(&t_opt, speed);
|
|
t_opt.c_cflag |= (CLOCAL | CREAD);
|
|
t_opt.c_cflag &= ~PARENB;
|
|
t_opt.c_cflag &= ~CSTOPB;
|
|
t_opt.c_cflag &= ~CSIZE;
|
|
t_opt.c_cflag |= CS8;
|
|
t_opt.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
|
|
t_opt.c_iflag &= ~(IXON | IXOFF | IXANY);
|
|
t_opt.c_oflag &= ~OPOST;
|
|
t_opt.c_cc[VMIN] = 0;
|
|
t_opt.c_cc[VTIME] = 10;
|
|
tcflush(buspirate_fd, TCIFLUSH);
|
|
tcsetattr(buspirate_fd, TCSANOW, &t_opt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int buspirate_serial_write(int fd, char *buf, int size)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = write(fd, buf, size);
|
|
|
|
LOG_DEBUG("size = %d ret = %d", size, ret);
|
|
buspirate_print_buffer(buf, size);
|
|
|
|
if (ret != size)
|
|
LOG_ERROR("Error sending data");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int buspirate_serial_read(int fd, char *buf, int size)
|
|
{
|
|
int len = 0;
|
|
int ret = 0;
|
|
int timeout = 0;
|
|
|
|
while (len < size) {
|
|
ret = read(fd, buf+len, size-len);
|
|
if (ret == -1)
|
|
return -1;
|
|
|
|
if (ret == 0) {
|
|
timeout++;
|
|
|
|
if (timeout >= 10)
|
|
break;
|
|
|
|
continue;
|
|
}
|
|
|
|
len += ret;
|
|
}
|
|
|
|
LOG_DEBUG("should have read = %d actual size = %d", size, len);
|
|
buspirate_print_buffer(buf, len);
|
|
|
|
if (len != size)
|
|
LOG_ERROR("Error sending data");
|
|
|
|
return len;
|
|
}
|
|
|
|
#define LINE_SIZE 81
|
|
#define BYTES_PER_LINE 16
|
|
static void buspirate_print_buffer(char *buf, int size)
|
|
{
|
|
char line[LINE_SIZE];
|
|
char tmp[10];
|
|
int offset = 0;
|
|
|
|
line[0] = 0;
|
|
while (offset < size) {
|
|
snprintf(tmp, 5, "%02x ", (uint8_t)buf[offset]);
|
|
offset++;
|
|
|
|
strcat(line, tmp);
|
|
|
|
if (offset % BYTES_PER_LINE == 0) {
|
|
LOG_DEBUG("%s", line);
|
|
line[0] = 0;
|
|
}
|
|
}
|
|
|
|
if (line[0] != 0) {
|
|
LOG_DEBUG("%s", line);
|
|
}
|
|
}
|
|
|