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openocd/src/jtag/ft2232.c

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/***************************************************************************
* Copyright (C) 2004, 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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. *
***************************************************************************/
/* This code uses information contained in the MPSSE specification which was
* found here:
* http://www.ftdichip.com/Documents/AppNotes/AN2232C-01_MPSSE_Cmnd.pdf
* Hereafter this is called the "MPSSE Spec".
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if IS_CYGWIN == 1
#include "windows.h"
#endif
#include "replacements.h"
/* project specific includes */
#include "log.h"
#include "types.h"
#include "jtag.h"
#include "configuration.h"
#include "time_support.h"
/* system includes */
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
/* FT2232 access library includes */
#if BUILD_FT2232_FTD2XX == 1
#include <ftd2xx.h>
#elif BUILD_FT2232_LIBFTDI == 1
#include <ftdi.h>
#endif
/* enable this to debug io latency
*/
#if 0
#define _DEBUG_USB_IO_
#endif
/* enable this to debug communication
*/
#if 0
#define _DEBUG_USB_COMMS_
#endif
int ft2232_execute_queue(void);
int ft2232_speed(int speed);
int ft2232_speed_div(int speed, int* khz);
int ft2232_khz(int khz, int* jtag_speed);
int ft2232_register_commands(struct command_context_s* cmd_ctx);
int ft2232_init(void);
int ft2232_quit(void);
int ft2232_handle_device_desc_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
int ft2232_handle_serial_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
int ft2232_handle_layout_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
int ft2232_handle_vid_pid_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
int ft2232_handle_latency_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc);
/**
* Function ft2232_stableclocks
* will send out \a num_cycles on the TCK line while the TAP(s)
* are in a stable state. Calling code must ensure that current state is
* stable, that verification is not done in here.
* @param num_cycles is the count of clocks cycles to send.
* @return int - ERROR_OK or ERROR_JTAG_QUEUE_FAILED
*/
static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd);
char* ft2232_device_desc = NULL;
char* ft2232_serial = NULL;
char* ft2232_layout = NULL;
unsigned char ft2232_latency = 2;
#define MAX_USB_IDS 8
/* vid = pid = 0 marks the end of the list */
static u16 ft2232_vid[MAX_USB_IDS + 1] = { 0x0403, 0 };
static u16 ft2232_pid[MAX_USB_IDS + 1] = { 0x6010, 0 };
typedef struct ft2232_layout_s
{
char* name;
int (*init)(void);
void (*reset)(int trst, int srst);
void (*blink)(void);
} ft2232_layout_t;
/* init procedures for supported layouts */
int usbjtag_init(void);
int jtagkey_init(void);
int olimex_jtag_init(void);
int flyswatter_init(void);
int turtle_init(void);
int comstick_init(void);
int stm32stick_init(void);
int axm0432_jtag_init(void);
/* reset procedures for supported layouts */
void usbjtag_reset(int trst, int srst);
void jtagkey_reset(int trst, int srst);
void olimex_jtag_reset(int trst, int srst);
void flyswatter_reset(int trst, int srst);
void turtle_reset(int trst, int srst);
void comstick_reset(int trst, int srst);
void stm32stick_reset(int trst, int srst);
void axm0432_jtag_reset(int trst, int srst);
/* blink procedures for layouts that support a blinking led */
void olimex_jtag_blink(void);
void turtle_jtag_blink(void);
ft2232_layout_t ft2232_layouts[] =
{
{ "usbjtag", usbjtag_init, usbjtag_reset, NULL },
{ "jtagkey", jtagkey_init, jtagkey_reset, NULL },
{ "jtagkey_prototype_v1", jtagkey_init, jtagkey_reset, NULL },
{ "oocdlink", jtagkey_init, jtagkey_reset, NULL },
{ "signalyzer", usbjtag_init, usbjtag_reset, NULL },
{ "evb_lm3s811", usbjtag_init, usbjtag_reset, NULL },
{ "olimex-jtag", olimex_jtag_init, olimex_jtag_reset, olimex_jtag_blink },
{ "flyswatter", flyswatter_init, flyswatter_reset, NULL },
{ "turtelizer2", turtle_init, turtle_reset, turtle_jtag_blink },
{ "comstick", comstick_init, comstick_reset, NULL },
{ "stm32stick", stm32stick_init, stm32stick_reset, NULL },
{ "axm0432_jtag", axm0432_jtag_init, axm0432_jtag_reset, NULL },
{ NULL, NULL, NULL },
};
static u8 nTRST, nTRSTnOE, nSRST, nSRSTnOE;
static ft2232_layout_t* layout;
static u8 low_output = 0x0;
static u8 low_direction = 0x0;
static u8 high_output = 0x0;
static u8 high_direction = 0x0;
#if BUILD_FT2232_FTD2XX == 1
static FT_HANDLE ftdih = NULL;
#elif BUILD_FT2232_LIBFTDI == 1
static struct ftdi_context ftdic;
#endif
static jtag_command_t* first_unsent; /* next command that has to be sent */
static int require_send;
static u8* ft2232_buffer = NULL;
static int ft2232_buffer_size = 0;
static int ft2232_read_pointer = 0;
static int ft2232_expect_read = 0;
#define FT2232_BUFFER_SIZE 131072
#define BUFFER_ADD ft2232_buffer[ft2232_buffer_size++]
#define BUFFER_READ ft2232_buffer[ft2232_read_pointer++]
jtag_interface_t ft2232_interface =
{
.name = "ft2232",
.execute_queue = ft2232_execute_queue,
.speed = ft2232_speed,
.speed_div = ft2232_speed_div,
.khz = ft2232_khz,
.register_commands = ft2232_register_commands,
.init = ft2232_init,
.quit = ft2232_quit,
};
int ft2232_write(u8* buf, int size, u32* bytes_written)
{
#if BUILD_FT2232_FTD2XX == 1
FT_STATUS status;
DWORD dw_bytes_written;
if ( ( status = FT_Write(ftdih, buf, size, &dw_bytes_written) ) != FT_OK )
{
*bytes_written = dw_bytes_written;
LOG_ERROR("FT_Write returned: %lu", status);
return ERROR_JTAG_DEVICE_ERROR;
}
else
{
*bytes_written = dw_bytes_written;
return ERROR_OK;
}
#elif BUILD_FT2232_LIBFTDI == 1
int retval;
if ( ( retval = ftdi_write_data(&ftdic, buf, size) ) < 0 )
{
*bytes_written = 0;
LOG_ERROR( "ftdi_write_data: %s", ftdi_get_error_string(&ftdic) );
return ERROR_JTAG_DEVICE_ERROR;
}
else
{
*bytes_written = retval;
return ERROR_OK;
}
#endif
}
int ft2232_read(u8* buf, int size, u32* bytes_read)
{
#if BUILD_FT2232_FTD2XX == 1
DWORD dw_bytes_read;
FT_STATUS status;
int timeout = 5;
*bytes_read = 0;
while ( (*bytes_read < size) && timeout-- )
{
if ( ( status = FT_Read(ftdih, buf + *bytes_read, size -
*bytes_read, &dw_bytes_read) ) != FT_OK )
{
*bytes_read = 0;
LOG_ERROR("FT_Read returned: %lu", status);
return ERROR_JTAG_DEVICE_ERROR;
}
*bytes_read += dw_bytes_read;
}
#elif BUILD_FT2232_LIBFTDI == 1
int retval;
int timeout = 100;
*bytes_read = 0;
while ( (*bytes_read < size) && timeout-- )
{
if ( ( retval = ftdi_read_data(&ftdic, buf + *bytes_read, size - *bytes_read) ) < 0 )
{
*bytes_read = 0;
LOG_ERROR( "ftdi_read_data: %s", ftdi_get_error_string(&ftdic) );
return ERROR_JTAG_DEVICE_ERROR;
}
*bytes_read += retval;
}
#endif
if (*bytes_read < size)
{
LOG_ERROR("couldn't read the requested number of bytes from FT2232 device (%i < %i)", *bytes_read, size);
return ERROR_JTAG_DEVICE_ERROR;
}
return ERROR_OK;
}
int ft2232_speed(int speed)
{
u8 buf[3];
int retval;
u32 bytes_written;
buf[0] = 0x86; /* command "set divisor" */
buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=2.0MHz, ...*/
buf[2] = (speed >> 8) & 0xff; /* valueH */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( retval = ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't set FT2232 TCK speed");
return retval;
}
return ERROR_OK;
}
int ft2232_speed_div(int speed, int* khz)
{
/* Take a look in the FT2232 manual,
* AN2232C-01 Command Processor for
* MPSSE and MCU Host Bus. Chapter 3.8 */
*khz = 6000 / (1 + speed);
return ERROR_OK;
}
int ft2232_khz(int khz, int* jtag_speed)
{
if (khz==0)
{
LOG_ERROR("RCLK not supported");
return ERROR_FAIL;
}
/* Take a look in the FT2232 manual,
* AN2232C-01 Command Processor for
* MPSSE and MCU Host Bus. Chapter 3.8
*
* We will calc here with a multiplier
* of 10 for better rounding later. */
/* Calc speed, (6000 / khz) - 1 */
/* Use 65000 for better rounding */
*jtag_speed = (60000 / khz) - 10;
/* Add 0.9 for rounding */
*jtag_speed += 9;
/* Calc real speed */
*jtag_speed = *jtag_speed / 10;
/* Check if speed is greater than 0 */
if (*jtag_speed < 0)
{
*jtag_speed = 0;
}
/* Check max value */
if (*jtag_speed > 0xFFFF)
{
*jtag_speed = 0xFFFF;
}
return ERROR_OK;
}
int ft2232_register_commands(struct command_context_s* cmd_ctx)
{
register_command(cmd_ctx, NULL, "ft2232_device_desc", ft2232_handle_device_desc_command,
COMMAND_CONFIG, "the USB device description of the FTDI FT2232 device");
register_command(cmd_ctx, NULL, "ft2232_serial", ft2232_handle_serial_command,
COMMAND_CONFIG, "the serial number of the FTDI FT2232 device");
register_command(cmd_ctx, NULL, "ft2232_layout", ft2232_handle_layout_command,
COMMAND_CONFIG, "the layout of the FT2232 GPIO signals used to control output-enables and reset signals");
register_command(cmd_ctx, NULL, "ft2232_vid_pid", ft2232_handle_vid_pid_command,
COMMAND_CONFIG, "the vendor ID and product ID of the FTDI FT2232 device");
register_command(cmd_ctx, NULL, "ft2232_latency", ft2232_handle_latency_command,
COMMAND_CONFIG, "set the FT2232 latency timer to a new value");
return ERROR_OK;
}
void ft2232_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);
}
}
void ft2232_read_scan(enum scan_type type, u8* buffer, int scan_size)
{
int num_bytes = (scan_size + 7) / 8;
int bits_left = scan_size;
int cur_byte = 0;
while (num_bytes-- > 1)
{
buffer[cur_byte] = BUFFER_READ;
cur_byte++;
bits_left -= 8;
}
buffer[cur_byte] = 0x0;
if (bits_left > 1)
{
buffer[cur_byte] = BUFFER_READ >> 1;
}
buffer[cur_byte] = ( buffer[cur_byte] | ( (BUFFER_READ & 0x02) << 6 ) ) >> (8 - bits_left);
}
void ft2232_debug_dump_buffer(void)
{
int i;
char line[256];
char* line_p = line;
for (i = 0; i < ft2232_buffer_size; i++)
{
line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ft2232_buffer[i]);
if (i % 16 == 15)
{
LOG_DEBUG("%s", line);
line_p = line;
}
}
if (line_p != line)
LOG_DEBUG("%s", line);
}
int ft2232_send_and_recv(jtag_command_t* first, jtag_command_t* last)
{
jtag_command_t* cmd;
u8* buffer;
int scan_size;
enum scan_type type;
int retval;
u32 bytes_written;
u32 bytes_read;
#ifdef _DEBUG_USB_IO_
struct timeval start, inter, inter2, end;
struct timeval d_inter, d_inter2, d_end;
#endif
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("write buffer (size %i):", ft2232_buffer_size);
ft2232_debug_dump_buffer();
#endif
#ifdef _DEBUG_USB_IO_
gettimeofday(&start, NULL);
#endif
if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
{
LOG_ERROR("couldn't write MPSSE commands to FT2232");
return retval;
}
#ifdef _DEBUG_USB_IO_
gettimeofday(&inter, NULL);
#endif
if (ft2232_expect_read)
{
int timeout = 100;
ft2232_buffer_size = 0;
#ifdef _DEBUG_USB_IO_
gettimeofday(&inter2, NULL);
#endif
if ( ( retval = ft2232_read(ft2232_buffer, ft2232_expect_read, &bytes_read) ) != ERROR_OK )
{
LOG_ERROR("couldn't read from FT2232");
return retval;
}
#ifdef _DEBUG_USB_IO_
gettimeofday(&end, NULL);
timeval_subtract(&d_inter, &inter, &start);
timeval_subtract(&d_inter2, &inter2, &start);
timeval_subtract(&d_end, &end, &start);
LOG_INFO("inter: %i.%06i, inter2: %i.%06i end: %i.%06i", d_inter.tv_sec, d_inter.tv_usec, d_inter2.tv_sec,
d_inter2.tv_usec, d_end.tv_sec,
d_end.tv_usec);
#endif
ft2232_buffer_size = bytes_read;
if (ft2232_expect_read != ft2232_buffer_size)
{
LOG_ERROR("ft2232_expect_read (%i) != ft2232_buffer_size (%i) (%i retries)", ft2232_expect_read,
ft2232_buffer_size,
100 - timeout);
ft2232_debug_dump_buffer();
exit(-1);
}
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ft2232_buffer_size);
ft2232_debug_dump_buffer();
#endif
}
ft2232_expect_read = 0;
ft2232_read_pointer = 0;
/* return ERROR_OK, unless a jtag_read_buffer returns a failed check
* that wasn't handled by a caller-provided error handler
*/
retval = ERROR_OK;
cmd = first;
while (cmd != last)
{
switch (cmd->type)
{
case JTAG_SCAN:
type = jtag_scan_type(cmd->cmd.scan);
if (type != SCAN_OUT)
{
scan_size = jtag_scan_size(cmd->cmd.scan);
buffer = calloc(CEIL(scan_size, 8), 1);
ft2232_read_scan(type, buffer, scan_size);
if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
free(buffer);
}
break;
default:
break;
}
cmd = cmd->next;
}
ft2232_buffer_size = 0;
return retval;
}
void ft2232_add_pathmove(pathmove_command_t* cmd)
{
int num_states = cmd->num_states;
int state_count = 0;
while (num_states)
{
u8 tms_byte = 0; /* zero this on each MPSSE batch */
int bit_count = 0;
int num_states_batch = num_states > 7 ? 7 : num_states;
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
/* number of states remaining */
BUFFER_ADD = num_states_batch - 1;
while (num_states_batch--)
{
if (tap_state_transition(tap_get_state(), FALSE) == cmd->path[state_count])
buf_set_u32(&tms_byte, bit_count++, 1, 0x0);
else if (tap_state_transition(tap_get_state(), TRUE) == cmd->path[state_count])
buf_set_u32(&tms_byte, bit_count++, 1, 0x1);
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--;
}
BUFFER_ADD = tms_byte;
}
tap_set_end_state(tap_get_state());
}
void ft2232_add_scan(int ir_scan, enum scan_type type, u8* buffer, int scan_size)
{
int num_bytes = (scan_size + 7) / 8;
int bits_left = scan_size;
int cur_byte = 0;
int last_bit;
if ( !( ( !ir_scan && (tap_get_state() == TAP_DRSHIFT) )
|| ( ir_scan && (tap_get_state() == TAP_IRSHIFT) ) ) )
{
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
BUFFER_ADD = 0x6; /* scan 7 bits */
/* TMS data bits */
if (ir_scan)
{
BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_IRSHIFT);
tap_set_state(TAP_IRSHIFT);
}
else
{
BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_DRSHIFT);
tap_set_state(TAP_DRSHIFT);
}
/* LOG_DEBUG("added TMS scan (no read)"); */
}
/* add command for complete bytes */
while (num_bytes > 1)
{
int thisrun_bytes;
if (type == SCAN_IO)
{
/* Clock Data Bytes In and Out LSB First */
BUFFER_ADD = 0x39;
/* LOG_DEBUG("added TDI bytes (io %i)", num_bytes); */
}
else if (type == SCAN_OUT)
{
/* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
BUFFER_ADD = 0x19;
/* LOG_DEBUG("added TDI bytes (o)"); */
}
else if (type == SCAN_IN)
{
/* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
BUFFER_ADD = 0x28;
/* LOG_DEBUG("added TDI bytes (i %i)", num_bytes); */
}
thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
num_bytes -= thisrun_bytes;
BUFFER_ADD = (thisrun_bytes - 1) & 0xff;
BUFFER_ADD = ( (thisrun_bytes - 1) >> 8 ) & 0xff;
if (type != SCAN_IN)
{
/* add complete bytes */
while (thisrun_bytes-- > 0)
{
BUFFER_ADD = buffer[cur_byte];
cur_byte++;
bits_left -= 8;
}
}
else /* (type == SCAN_IN) */
{
bits_left -= 8 * (thisrun_bytes);
}
}
/* the most signifcant bit is scanned during TAP movement */
if (type != SCAN_IN)
last_bit = ( buffer[cur_byte] >> (bits_left - 1) ) & 0x1;
else
last_bit = 0;
/* process remaining bits but the last one */
if (bits_left > 1)
{
if (type == SCAN_IO)
{
/* Clock Data Bits In and Out LSB First */
BUFFER_ADD = 0x3b;
/* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
}
else if (type == SCAN_OUT)
{
/* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
BUFFER_ADD = 0x1b;
/* LOG_DEBUG("added TDI bits (o)"); */
}
else if (type == SCAN_IN)
{
/* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
BUFFER_ADD = 0x2a;
/* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
}
BUFFER_ADD = bits_left - 2;
if (type != SCAN_IN)
BUFFER_ADD = buffer[cur_byte];
}
if ( ( ir_scan && (tap_get_end_state() == TAP_IRSHIFT) )
|| ( !ir_scan && (tap_get_end_state() == TAP_DRSHIFT) ) )
{
if (type == SCAN_IO)
{
/* Clock Data Bits In and Out LSB First */
BUFFER_ADD = 0x3b;
/* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
}
else if (type == SCAN_OUT)
{
/* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
BUFFER_ADD = 0x1b;
/* LOG_DEBUG("added TDI bits (o)"); */
}
else if (type == SCAN_IN)
{
/* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
BUFFER_ADD = 0x2a;
/* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
}
BUFFER_ADD = 0x0;
BUFFER_ADD = last_bit;
}
else
{
/* move from Shift-IR/DR to end state */
if (type != SCAN_OUT)
{
/* Clock Data to TMS/CS Pin with Read */
BUFFER_ADD = 0x6b;
/* LOG_DEBUG("added TMS scan (read)"); */
}
else
{
/* Clock Data to TMS/CS Pin (no Read) */
BUFFER_ADD = 0x4b;
/* LOG_DEBUG("added TMS scan (no read)"); */
}
BUFFER_ADD = 0x6; /* scan 7 bits */
BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() ) | (last_bit << 7);
tap_set_state( tap_get_end_state() );
}
}
int ft2232_large_scan(scan_command_t* cmd, enum scan_type type, u8* buffer, int scan_size)
{
int num_bytes = (scan_size + 7) / 8;
int bits_left = scan_size;
int cur_byte = 0;
int last_bit;
u8* receive_buffer = malloc( CEIL(scan_size, 8) );
u8* receive_pointer = receive_buffer;
u32 bytes_written;
u32 bytes_read;
int retval;
int thisrun_read = 0;
if (cmd->ir_scan)
{
LOG_ERROR("BUG: large IR scans are not supported");
exit(-1);
}
if (tap_get_state() != TAP_DRSHIFT)
{
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
BUFFER_ADD = 0x6; /* scan 7 bits */
/* TMS data bits */
BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_DRSHIFT);
tap_set_state(TAP_DRSHIFT);
}
if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
{
LOG_ERROR("couldn't write MPSSE commands to FT2232");
exit(-1);
}
LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
ft2232_buffer_size = 0;
/* add command for complete bytes */
while (num_bytes > 1)
{
int thisrun_bytes;
if (type == SCAN_IO)
{
/* Clock Data Bytes In and Out LSB First */
BUFFER_ADD = 0x39;
/* LOG_DEBUG("added TDI bytes (io %i)", num_bytes); */
}
else if (type == SCAN_OUT)
{
/* Clock Data Bytes Out on -ve Clock Edge LSB First (no Read) */
BUFFER_ADD = 0x19;
/* LOG_DEBUG("added TDI bytes (o)"); */
}
else if (type == SCAN_IN)
{
/* Clock Data Bytes In on +ve Clock Edge LSB First (no Write) */
BUFFER_ADD = 0x28;
/* LOG_DEBUG("added TDI bytes (i %i)", num_bytes); */
}
thisrun_bytes = (num_bytes > 65537) ? 65536 : (num_bytes - 1);
thisrun_read = thisrun_bytes;
num_bytes -= thisrun_bytes;
BUFFER_ADD = (thisrun_bytes - 1) & 0xff;
BUFFER_ADD = ( (thisrun_bytes - 1) >> 8 ) & 0xff;
if (type != SCAN_IN)
{
/* add complete bytes */
while (thisrun_bytes-- > 0)
{
BUFFER_ADD = buffer[cur_byte];
cur_byte++;
bits_left -= 8;
}
}
else /* (type == SCAN_IN) */
{
bits_left -= 8 * (thisrun_bytes);
}
if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
{
LOG_ERROR("couldn't write MPSSE commands to FT2232");
exit(-1);
}
LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
ft2232_buffer_size = 0;
if (type != SCAN_OUT)
{
if ( ( retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read) ) != ERROR_OK )
{
LOG_ERROR("couldn't read from FT2232");
exit(-1);
}
LOG_DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
receive_pointer += bytes_read;
}
}
thisrun_read = 0;
/* the most signifcant bit is scanned during TAP movement */
if (type != SCAN_IN)
last_bit = ( buffer[cur_byte] >> (bits_left - 1) ) & 0x1;
else
last_bit = 0;
/* process remaining bits but the last one */
if (bits_left > 1)
{
if (type == SCAN_IO)
{
/* Clock Data Bits In and Out LSB First */
BUFFER_ADD = 0x3b;
/* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
}
else if (type == SCAN_OUT)
{
/* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
BUFFER_ADD = 0x1b;
/* LOG_DEBUG("added TDI bits (o)"); */
}
else if (type == SCAN_IN)
{
/* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
BUFFER_ADD = 0x2a;
/* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
}
BUFFER_ADD = bits_left - 2;
if (type != SCAN_IN)
BUFFER_ADD = buffer[cur_byte];
if (type != SCAN_OUT)
thisrun_read += 2;
}
if (tap_get_end_state() == TAP_DRSHIFT)
{
if (type == SCAN_IO)
{
/* Clock Data Bits In and Out LSB First */
BUFFER_ADD = 0x3b;
/* LOG_DEBUG("added TDI bits (io) %i", bits_left - 1); */
}
else if (type == SCAN_OUT)
{
/* Clock Data Bits Out on -ve Clock Edge LSB First (no Read) */
BUFFER_ADD = 0x1b;
/* LOG_DEBUG("added TDI bits (o)"); */
}
else if (type == SCAN_IN)
{
/* Clock Data Bits In on +ve Clock Edge LSB First (no Write) */
BUFFER_ADD = 0x2a;
/* LOG_DEBUG("added TDI bits (i %i)", bits_left - 1); */
}
BUFFER_ADD = 0x0;
BUFFER_ADD = last_bit;
}
else
{
/* move from Shift-IR/DR to end state */
if (type != SCAN_OUT)
{
/* Clock Data to TMS/CS Pin with Read */
BUFFER_ADD = 0x6b;
/* LOG_DEBUG("added TMS scan (read)"); */
}
else
{
/* Clock Data to TMS/CS Pin (no Read) */
BUFFER_ADD = 0x4b;
/* LOG_DEBUG("added TMS scan (no read)"); */
}
BUFFER_ADD = 0x6;
BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() ) | (last_bit << 7);
tap_set_state( tap_get_end_state() );
}
if (type != SCAN_OUT)
thisrun_read += 1;
if ( ( retval = ft2232_write(ft2232_buffer, ft2232_buffer_size, &bytes_written) ) != ERROR_OK )
{
LOG_ERROR("couldn't write MPSSE commands to FT2232");
exit(-1);
}
LOG_DEBUG("ft2232_buffer_size: %i, bytes_written: %i", ft2232_buffer_size, bytes_written);
ft2232_buffer_size = 0;
if (type != SCAN_OUT)
{
if ( ( retval = ft2232_read(receive_pointer, thisrun_read, &bytes_read) ) != ERROR_OK )
{
LOG_ERROR("couldn't read from FT2232");
exit(-1);
}
LOG_DEBUG("thisrun_read: %i, bytes_read: %i", thisrun_read, bytes_read);
receive_pointer += bytes_read;
}
return ERROR_OK;
}
int ft2232_predict_scan_out(int scan_size, enum scan_type type)
{
int predicted_size = 3;
int num_bytes = (scan_size - 1) / 8;
if (tap_get_state() != TAP_DRSHIFT)
predicted_size += 3;
if (type == SCAN_IN) /* only from device to host */
{
/* complete bytes */
predicted_size += CEIL(num_bytes, 65536) * 3;
/* remaining bits - 1 (up to 7) */
predicted_size += ( (scan_size - 1) % 8 ) ? 2 : 0;
}
else /* host to device, or bidirectional */
{
/* complete bytes */
predicted_size += num_bytes + CEIL(num_bytes, 65536) * 3;
/* remaining bits -1 (up to 7) */
predicted_size += ( (scan_size - 1) % 8 ) ? 3 : 0;
}
return predicted_size;
}
int ft2232_predict_scan_in(int scan_size, enum scan_type type)
{
int predicted_size = 0;
if (type != SCAN_OUT)
{
/* complete bytes */
predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) - 1) : 0;
/* remaining bits - 1 */
predicted_size += ( (scan_size - 1) % 8 ) ? 1 : 0;
/* last bit (from TMS scan) */
predicted_size += 1;
}
/* LOG_DEBUG("scan_size: %i, predicted_size: %i", scan_size, predicted_size); */
return predicted_size;
}
void usbjtag_reset(int trst, int srst)
{
if (trst == 1)
{
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
low_direction |= nTRSTnOE; /* switch to output pin (output is low) */
else
low_output &= ~nTRST; /* switch output low */
}
else if (trst == 0)
{
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
low_direction &= ~nTRSTnOE; /* switch to input pin (high-Z + internal and external pullup) */
else
low_output |= nTRST; /* switch output high */
}
if (srst == 1)
{
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
low_output &= ~nSRST; /* switch output low */
else
low_direction |= nSRSTnOE; /* switch to output pin (output is low) */
}
else if (srst == 0)
{
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
low_output |= nSRST; /* switch output high */
else
low_direction &= ~nSRSTnOE; /* switch to input pin (high-Z) */
}
/* command "set data bits low byte" */
BUFFER_ADD = 0x80;
BUFFER_ADD = low_output;
BUFFER_ADD = low_direction;
}
void jtagkey_reset(int trst, int srst)
{
if (trst == 1)
{
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
high_output &= ~nTRSTnOE;
else
high_output &= ~nTRST;
}
else if (trst == 0)
{
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
high_output |= nTRSTnOE;
else
high_output |= nTRST;
}
if (srst == 1)
{
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
high_output &= ~nSRST;
else
high_output &= ~nSRSTnOE;
}
else if (srst == 0)
{
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
high_output |= nSRST;
else
high_output |= nSRSTnOE;
}
/* command "set data bits high byte" */
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
high_direction);
}
void olimex_jtag_reset(int trst, int srst)
{
if (trst == 1)
{
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
high_output &= ~nTRSTnOE;
else
high_output &= ~nTRST;
}
else if (trst == 0)
{
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
high_output |= nTRSTnOE;
else
high_output |= nTRST;
}
if (srst == 1)
{
high_output |= nSRST;
}
else if (srst == 0)
{
high_output &= ~nSRST;
}
/* command "set data bits high byte" */
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
high_direction);
}
void axm0432_jtag_reset(int trst, int srst)
{
if (trst == 1)
{
tap_set_state(TAP_RESET);
high_output &= ~nTRST;
}
else if (trst == 0)
{
high_output |= nTRST;
}
if (srst == 1)
{
high_output &= ~nSRST;
}
else if (srst == 0)
{
high_output |= nSRST;
}
/* command "set data bits low byte" */
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
high_direction);
}
void flyswatter_reset(int trst, int srst)
{
if (trst == 1)
{
low_output &= ~nTRST;
}
else if (trst == 0)
{
low_output |= nTRST;
}
if (srst == 1)
{
low_output |= nSRST;
}
else if (srst == 0)
{
low_output &= ~nSRST;
}
/* command "set data bits low byte" */
BUFFER_ADD = 0x80;
BUFFER_ADD = low_output;
BUFFER_ADD = low_direction;
LOG_DEBUG("trst: %i, srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", trst, srst, low_output, low_direction);
}
void turtle_reset(int trst, int srst)
{
trst = trst;
if (srst == 1)
{
low_output |= nSRST;
}
else if (srst == 0)
{
low_output &= ~nSRST;
}
/* command "set data bits low byte" */
BUFFER_ADD = 0x80;
BUFFER_ADD = low_output;
BUFFER_ADD = low_direction;
LOG_DEBUG("srst: %i, low_output: 0x%2.2x, low_direction: 0x%2.2x", srst, low_output, low_direction);
}
void comstick_reset(int trst, int srst)
{
if (trst == 1)
{
high_output &= ~nTRST;
}
else if (trst == 0)
{
high_output |= nTRST;
}
if (srst == 1)
{
high_output &= ~nSRST;
}
else if (srst == 0)
{
high_output |= nSRST;
}
/* command "set data bits high byte" */
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
high_direction);
}
void stm32stick_reset(int trst, int srst)
{
if (trst == 1)
{
high_output &= ~nTRST;
}
else if (trst == 0)
{
high_output |= nTRST;
}
if (srst == 1)
{
low_output &= ~nSRST;
}
else if (srst == 0)
{
low_output |= nSRST;
}
/* command "set data bits low byte" */
BUFFER_ADD = 0x80;
BUFFER_ADD = low_output;
BUFFER_ADD = low_direction;
/* command "set data bits high byte" */
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
LOG_DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output,
high_direction);
}
int ft2232_execute_queue()
{
jtag_command_t* cmd = jtag_command_queue; /* currently processed command */
u8* buffer;
int scan_size; /* size of IR or DR scan */
enum scan_type type;
int i;
int predicted_size = 0;
int retval;
first_unsent = cmd; /* next command that has to be sent */
require_send = 0;
/* return ERROR_OK, unless ft2232_send_and_recv reports a failed check
* that wasn't handled by a caller-provided error handler
*/
retval = ERROR_OK;
ft2232_buffer_size = 0;
ft2232_expect_read = 0;
/* blink, if the current layout has that feature */
if (layout->blink)
layout->blink();
while (cmd)
{
switch (cmd->type)
{
case JTAG_END_STATE:
if (cmd->cmd.end_state->end_state != -1)
ft2232_end_state(cmd->cmd.end_state->end_state);
break;
case JTAG_RESET:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3;
if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
{
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
require_send = 0;
first_unsent = cmd;
}
if ( (cmd->cmd.reset->trst == 1) || ( cmd->cmd.reset->srst && (jtag_reset_config & RESET_SRST_PULLS_TRST) ) )
{
tap_set_state(TAP_RESET);
}
layout->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG("trst: %i, srst: %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
#endif
break;
case JTAG_RUNTEST:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 0;
if (tap_get_state() != TAP_IDLE)
predicted_size += 3;
predicted_size += 3 * CEIL(cmd->cmd.runtest->num_cycles, 7);
if ( (cmd->cmd.runtest->end_state != -1) && (cmd->cmd.runtest->end_state != TAP_IDLE) )
predicted_size += 3;
if ( (cmd->cmd.runtest->end_state == -1) && (tap_get_end_state() != TAP_IDLE) )
predicted_size += 3;
if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
{
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
require_send = 0;
first_unsent = cmd;
}
if (tap_get_state() != TAP_IDLE)
{
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
BUFFER_ADD = 0x6; /* scan 7 bits */
/* TMS data bits */
BUFFER_ADD = tap_get_tms_path(tap_get_state(), TAP_IDLE);
tap_set_state(TAP_IDLE);
require_send = 1;
}
i = cmd->cmd.runtest->num_cycles;
while (i > 0)
{
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
/* scan 7 bits */
BUFFER_ADD = (i > 7) ? 6 : (i - 1);
/* TMS data bits */
BUFFER_ADD = 0x0;
tap_set_state(TAP_IDLE);
i -= (i > 7) ? 7 : i;
/* LOG_DEBUG("added TMS scan (no read)"); */
}
if (cmd->cmd.runtest->end_state != -1)
ft2232_end_state(cmd->cmd.runtest->end_state);
if ( tap_get_state() != tap_get_end_state() )
{
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
/* scan 7 bit */
BUFFER_ADD = 0x6;
/* TMS data bits */
BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() );
tap_set_state( tap_get_end_state() );
/* LOG_DEBUG("added TMS scan (no read)"); */
}
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG( "runtest: %i, end in %s", cmd->cmd.runtest->num_cycles, tap_state_name( tap_get_end_state() ) );
#endif
break;
case JTAG_STATEMOVE:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3;
if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
{
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
require_send = 0;
first_unsent = cmd;
}
if (cmd->cmd.statemove->end_state != -1)
ft2232_end_state(cmd->cmd.statemove->end_state);
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
BUFFER_ADD = 0x6; /* scan 7 bits */
/* TMS data bits */
BUFFER_ADD = tap_get_tms_path( tap_get_state(), tap_get_end_state() );
/* LOG_DEBUG("added TMS scan (no read)"); */
tap_set_state( tap_get_end_state() );
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG( "statemove: %s", tap_state_name( tap_get_end_state() ) );
#endif
break;
case JTAG_PATHMOVE:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3 * CEIL(cmd->cmd.pathmove->num_states, 7);
if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
{
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
require_send = 0;
first_unsent = cmd;
}
ft2232_add_pathmove(cmd->cmd.pathmove);
require_send = 1;
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG( "pathmove: %i states, end in %s", cmd->cmd.pathmove->num_states,
tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]) );
#endif
break;
case JTAG_SCAN:
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
type = jtag_scan_type(cmd->cmd.scan);
predicted_size = ft2232_predict_scan_out(scan_size, type);
if ( (predicted_size + 1) > FT2232_BUFFER_SIZE )
{
LOG_DEBUG("oversized ft2232 scan (predicted_size > FT2232_BUFFER_SIZE)");
/* unsent commands before this */
if (first_unsent != cmd)
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
/* current command */
if (cmd->cmd.scan->end_state != -1)
ft2232_end_state(cmd->cmd.scan->end_state);
ft2232_large_scan(cmd->cmd.scan, type, buffer, scan_size);
require_send = 0;
first_unsent = cmd->next;
if (buffer)
free(buffer);
break;
}
else if (ft2232_buffer_size + predicted_size + 1 > FT2232_BUFFER_SIZE)
{
LOG_DEBUG("ft2232 buffer size reached, sending queued commands (first_unsent: %p, cmd: %p)",
first_unsent,
cmd);
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
require_send = 0;
first_unsent = cmd;
}
ft2232_expect_read += ft2232_predict_scan_in(scan_size, type);
/* LOG_DEBUG("new read size: %i", ft2232_expect_read); */
if (cmd->cmd.scan->end_state != -1)
ft2232_end_state(cmd->cmd.scan->end_state);
ft2232_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
require_send = 1;
if (buffer)
free(buffer);
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG( "%s scan, %i bits, end in %s", (cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
tap_state_name( tap_get_end_state() ) );
#endif
break;
case JTAG_SLEEP:
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
first_unsent = cmd->next;
jtag_sleep(cmd->cmd.sleep->us);
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG( "sleep %i usec while in %s", cmd->cmd.sleep->us, tap_state_name( tap_get_state() ) );
#endif
break;
case JTAG_STABLECLOCKS:
/* this is only allowed while in a stable state. A check for a stable
* state was done in jtag_add_clocks()
*/
if (ft2232_stableclocks(cmd->cmd.stableclocks->num_cycles, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
#ifdef _DEBUG_JTAG_IO_
LOG_DEBUG( "clocks %i while in %s", cmd->cmd.stableclocks->num_cycles, tap_state_name( tap_get_state() ) );
#endif
break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
}
cmd = cmd->next;
}
if (require_send > 0)
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
return retval;
}
#if BUILD_FT2232_FTD2XX == 1
static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int* try_more)
{
FT_STATUS status;
DWORD openex_flags = 0;
char* openex_string = NULL;
u8 latency_timer;
LOG_DEBUG("'ft2232' interface using FTD2XX with '%s' layout (%4.4x:%4.4x)", ft2232_layout, vid, pid);
#if IS_WIN32 == 0
/* Add non-standard Vid/Pid to the linux driver */
if ( ( status = FT_SetVIDPID(vid, pid) ) != FT_OK )
{
LOG_WARNING("couldn't add %4.4x:%4.4x", vid, pid);
}
#endif
if (ft2232_device_desc && ft2232_serial)
{
LOG_WARNING("can't open by device description and serial number, giving precedence to serial");
ft2232_device_desc = NULL;
}
if (ft2232_device_desc)
{
openex_string = ft2232_device_desc;
openex_flags = FT_OPEN_BY_DESCRIPTION;
}
else if (ft2232_serial)
{
openex_string = ft2232_serial;
openex_flags = FT_OPEN_BY_SERIAL_NUMBER;
}
else
{
LOG_ERROR("neither device description nor serial number specified");
LOG_ERROR("please add \"ft2232_device_desc <string>\" or \"ft2232_serial <string>\" to your .cfg file");
return ERROR_JTAG_INIT_FAILED;
}
if ( ( status = FT_OpenEx(openex_string, openex_flags, &ftdih) ) != FT_OK )
{
DWORD num_devices;
if (more)
{
LOG_WARNING("unable to open ftdi device (trying more): %lu", status);
*try_more = 1;
return ERROR_JTAG_INIT_FAILED;
}
LOG_ERROR("unable to open ftdi device: %lu", status);
status = FT_ListDevices(&num_devices, NULL, FT_LIST_NUMBER_ONLY);
if (status == FT_OK)
{
char** desc_array = malloc( sizeof(char*) * (num_devices + 1) );
int i;
for (i = 0; i < num_devices; i++)
desc_array[i] = malloc(64);
desc_array[num_devices] = NULL;
status = FT_ListDevices(desc_array, &num_devices, FT_LIST_ALL | openex_flags);
if (status == FT_OK)
{
LOG_ERROR("ListDevices: %lu\n", num_devices);
for (i = 0; i < num_devices; i++)
LOG_ERROR("%i: \"%s\"", i, desc_array[i]);
}
for (i = 0; i < num_devices; i++)
free(desc_array[i]);
free(desc_array);
}
else
{
LOG_ERROR("ListDevices: NONE\n");
}
return ERROR_JTAG_INIT_FAILED;
}
if ( ( status = FT_SetLatencyTimer(ftdih, ft2232_latency) ) != FT_OK )
{
LOG_ERROR("unable to set latency timer: %lu", status);
return ERROR_JTAG_INIT_FAILED;
}
if ( ( status = FT_GetLatencyTimer(ftdih, &latency_timer) ) != FT_OK )
{
LOG_ERROR("unable to get latency timer: %lu", status);
return ERROR_JTAG_INIT_FAILED;
}
else
{
LOG_DEBUG("current latency timer: %i", latency_timer);
}
if ( ( status = FT_SetTimeouts(ftdih, 5000, 5000) ) != FT_OK )
{
LOG_ERROR("unable to set timeouts: %lu", status);
return ERROR_JTAG_INIT_FAILED;
}
if ( ( status = FT_SetBitMode(ftdih, 0x0b, 2) ) != FT_OK )
{
LOG_ERROR("unable to enable bit i/o mode: %lu", status);
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
static int ft2232_purge_ftd2xx(void)
{
FT_STATUS status;
if ( ( status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX) ) != FT_OK )
{
LOG_ERROR("error purging ftd2xx device: %lu", status);
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
#endif /* BUILD_FT2232_FTD2XX == 1 */
#if BUILD_FT2232_LIBFTDI == 1
static int ft2232_init_libftdi(u16 vid, u16 pid, int more, int* try_more)
{
u8 latency_timer;
LOG_DEBUG("'ft2232' interface using libftdi with '%s' layout (%4.4x:%4.4x)",
ft2232_layout, vid, pid);
if (ftdi_init(&ftdic) < 0)
return ERROR_JTAG_INIT_FAILED;
/* context, vendor id, product id */
if (ftdi_usb_open_desc(&ftdic, vid, pid, ft2232_device_desc,
ft2232_serial) < 0)
{
if (more)
LOG_WARNING("unable to open ftdi device (trying more): %s",
ftdic.error_str);
else
LOG_ERROR("unable to open ftdi device: %s", ftdic.error_str);
*try_more = 1;
return ERROR_JTAG_INIT_FAILED;
}
if (ftdi_set_interface(&ftdic, INTERFACE_A) < 0)
{
LOG_ERROR("unable to select FT2232 channel A: %s", ftdic.error_str);
return ERROR_JTAG_INIT_FAILED;
}
if (ftdi_usb_reset(&ftdic) < 0)
{
LOG_ERROR("unable to reset ftdi device");
return ERROR_JTAG_INIT_FAILED;
}
if (ftdi_set_latency_timer(&ftdic, ft2232_latency) < 0)
{
LOG_ERROR("unable to set latency timer");
return ERROR_JTAG_INIT_FAILED;
}
if (ftdi_get_latency_timer(&ftdic, &latency_timer) < 0)
{
LOG_ERROR("unable to get latency timer");
return ERROR_JTAG_INIT_FAILED;
}
else
{
LOG_DEBUG("current latency timer: %i", latency_timer);
}
ftdi_set_bitmode(&ftdic, 0x0b, 2); /* ctx, JTAG I/O mask */
return ERROR_OK;
}
static int ft2232_purge_libftdi(void)
{
if (ftdi_usb_purge_buffers(&ftdic) < 0)
{
LOG_ERROR("ftdi_purge_buffers: %s", ftdic.error_str);
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
#endif /* BUILD_FT2232_LIBFTDI == 1 */
int ft2232_init(void)
{
u8 buf[1];
int retval;
u32 bytes_written;
ft2232_layout_t* cur_layout = ft2232_layouts;
int i;
if ( (ft2232_layout == NULL) || (ft2232_layout[0] == 0) )
{
ft2232_layout = "usbjtag";
LOG_WARNING("No ft2232 layout specified, using default 'usbjtag'");
}
while (cur_layout->name)
{
if (strcmp(cur_layout->name, ft2232_layout) == 0)
{
layout = cur_layout;
break;
}
cur_layout++;
}
if (!layout)
{
LOG_ERROR("No matching layout found for %s", ft2232_layout);
return ERROR_JTAG_INIT_FAILED;
}
for (i = 0; 1; i++)
{
/*
* "more indicates that there are more IDs to try, so we should
* not print an error for an ID mismatch (but for anything
* else, we should).
*
* try_more indicates that the error code returned indicates an
* ID mismatch (and nothing else) and that we should proceeed
* with the next ID pair.
*/
int more = ft2232_vid[i + 1] || ft2232_pid[i + 1];
int try_more = 0;
#if BUILD_FT2232_FTD2XX == 1
retval = ft2232_init_ftd2xx(ft2232_vid[i], ft2232_pid[i],
more, &try_more);
#elif BUILD_FT2232_LIBFTDI == 1
retval = ft2232_init_libftdi(ft2232_vid[i], ft2232_pid[i],
more, &try_more);
#endif
if (retval >= 0)
break;
if (!more || !try_more)
return retval;
}
ft2232_buffer_size = 0;
ft2232_buffer = malloc(FT2232_BUFFER_SIZE);
if (layout->init() != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
ft2232_speed(jtag_speed);
buf[0] = 0x85; /* Disconnect TDI/DO to TDO/DI for Loopback */
if ( ( ( retval = ft2232_write(buf, 1, &bytes_written) ) != ERROR_OK ) || (bytes_written != 1) )
{
LOG_ERROR("couldn't write to FT2232 to disable loopback");
return ERROR_JTAG_INIT_FAILED;
}
#if BUILD_FT2232_FTD2XX == 1
return ft2232_purge_ftd2xx();
#elif BUILD_FT2232_LIBFTDI == 1
return ft2232_purge_libftdi();
#endif
return ERROR_OK;
}
int usbjtag_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x08;
low_direction = 0x0b;
if (strcmp(ft2232_layout, "usbjtag") == 0)
{
nTRST = 0x10;
nTRSTnOE = 0x10;
nSRST = 0x40;
nSRSTnOE = 0x40;
}
else if (strcmp(ft2232_layout, "signalyzer") == 0)
{
nTRST = 0x10;
nTRSTnOE = 0x10;
nSRST = 0x20;
nSRSTnOE = 0x20;
}
else if (strcmp(ft2232_layout, "evb_lm3s811") == 0)
{
nTRST = 0x0;
nTRSTnOE = 0x00;
nSRST = 0x20;
nSRSTnOE = 0x20;
low_output = 0x88;
low_direction = 0x8b;
}
else
{
LOG_ERROR("BUG: usbjtag_init called for unknown layout '%s'", ft2232_layout);
return ERROR_JTAG_INIT_FAILED;
}
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
{
low_direction &= ~nTRSTnOE; /* nTRST input */
low_output &= ~nTRST; /* nTRST = 0 */
}
else
{
low_direction |= nTRSTnOE; /* nTRST output */
low_output |= nTRST; /* nTRST = 1 */
}
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
{
low_direction |= nSRSTnOE; /* nSRST output */
low_output |= nSRST; /* nSRST = 1 */
}
else
{
low_direction &= ~nSRSTnOE; /* nSRST input */
low_output &= ~nSRST; /* nSRST = 0 */
}
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, xRST high) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'USBJTAG' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int axm0432_jtag_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x08;
low_direction = 0x2b;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
return ERROR_JTAG_INIT_FAILED;
}
if (strcmp(layout->name, "axm0432_jtag") == 0)
{
nTRST = 0x08;
nTRSTnOE = 0x0; /* No output enable for TRST*/
nSRST = 0x04;
nSRSTnOE = 0x0; /* No output enable for SRST*/
}
else
{
LOG_ERROR("BUG: axm0432_jtag_init called for non axm0432 layout");
exit(-1);
}
high_output = 0x0;
high_direction = 0x0c;
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
{
LOG_ERROR("can't set nTRSTOE to push-pull on the Dicarlo jtag");
}
else
{
high_output |= nTRST;
}
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
{
LOG_ERROR("can't set nSRST to push-pull on the Dicarlo jtag");
}
else
{
high_output |= nSRST;
}
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output; /* value */
buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'Dicarlo' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int jtagkey_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x08;
low_direction = 0x1b;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
return ERROR_JTAG_INIT_FAILED;
}
if (strcmp(layout->name, "jtagkey") == 0)
{
nTRST = 0x01;
nTRSTnOE = 0x4;
nSRST = 0x02;
nSRSTnOE = 0x08;
}
else if ( (strcmp(layout->name, "jtagkey_prototype_v1") == 0)
|| (strcmp(layout->name, "oocdlink") == 0) )
{
nTRST = 0x02;
nTRSTnOE = 0x1;
nSRST = 0x08;
nSRSTnOE = 0x04;
}
else
{
LOG_ERROR("BUG: jtagkey_init called for non jtagkey layout");
exit(-1);
}
high_output = 0x0;
high_direction = 0x0f;
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
{
high_output |= nTRSTnOE;
high_output &= ~nTRST;
}
else
{
high_output &= ~nTRSTnOE;
high_output |= nTRST;
}
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
{
high_output &= ~nSRSTnOE;
high_output |= nSRST;
}
else
{
high_output |= nSRSTnOE;
high_output &= ~nSRST;
}
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output; /* value */
buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int olimex_jtag_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x08;
low_direction = 0x1b;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
return ERROR_JTAG_INIT_FAILED;
}
nTRST = 0x01;
nTRSTnOE = 0x4;
nSRST = 0x02;
nSRSTnOE = 0x00; /* no output enable for nSRST */
high_output = 0x0;
high_direction = 0x0f;
if (jtag_reset_config & RESET_TRST_OPEN_DRAIN)
{
high_output |= nTRSTnOE;
high_output &= ~nTRST;
}
else
{
high_output &= ~nTRSTnOE;
high_output |= nTRST;
}
if (jtag_reset_config & RESET_SRST_PUSH_PULL)
{
LOG_ERROR("can't set nSRST to push-pull on the Olimex ARM-USB-OCD");
}
else
{
high_output &= ~nSRST;
}
/* turn red LED on */
high_output |= 0x08;
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output; /* value */
buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'JTAGkey' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int flyswatter_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x18;
low_direction = 0xfb;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE[12]=out, n[ST]srst=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
return ERROR_JTAG_INIT_FAILED;
}
nTRST = 0x10;
nTRSTnOE = 0x0; /* not output enable for nTRST */
nSRST = 0x20;
nSRSTnOE = 0x00; /* no output enable for nSRST */
high_output = 0x00;
high_direction = 0x0c;
/* turn red LED1 on, LED2 off */
high_output |= 0x08;
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output; /* value */
buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'flyswatter' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int turtle_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x08;
low_direction = 0x5b;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
return ERROR_JTAG_INIT_FAILED;
}
nSRST = 0x40;
high_output = 0x00;
high_direction = 0x0C;
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output;
buf[2] = high_direction;
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'turtelizer2' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int comstick_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x08;
low_direction = 0x0b;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'comstick' layout");
return ERROR_JTAG_INIT_FAILED;
}
nTRST = 0x01;
nTRSTnOE = 0x00; /* no output enable for nTRST */
nSRST = 0x02;
nSRSTnOE = 0x00; /* no output enable for nSRST */
high_output = 0x03;
high_direction = 0x03;
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output;
buf[2] = high_direction;
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'comstick' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int stm32stick_init(void)
{
u8 buf[3];
u32 bytes_written;
low_output = 0x88;
low_direction = 0x8b;
/* initialize low byte for jtag */
buf[0] = 0x80; /* command "set data bits low byte" */
buf[1] = low_output; /* value (TMS=1,TCK=0, TDI=0, nOE=0) */
buf[2] = low_direction; /* dir (output=1), TCK/TDI/TMS=out, TDO=in, nOE=out */
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'stm32stick' layout");
return ERROR_JTAG_INIT_FAILED;
}
nTRST = 0x01;
nTRSTnOE = 0x00; /* no output enable for nTRST */
nSRST = 0x80;
nSRSTnOE = 0x00; /* no output enable for nSRST */
high_output = 0x01;
high_direction = 0x03;
/* initialize high port */
buf[0] = 0x82; /* command "set data bits high byte" */
buf[1] = high_output;
buf[2] = high_direction;
LOG_DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if ( ( ( ft2232_write(buf, 3, &bytes_written) ) != ERROR_OK ) || (bytes_written != 3) )
{
LOG_ERROR("couldn't initialize FT2232 with 'stm32stick' layout");
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
void olimex_jtag_blink(void)
{
/* Olimex ARM-USB-OCD has a LED connected to ACBUS3
* ACBUS3 is bit 3 of the GPIOH port
*/
if (high_output & 0x08)
{
/* set port pin high */
high_output &= 0x07;
}
else
{
/* set port pin low */
high_output |= 0x08;
}
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
}
void turtle_jtag_blink(void)
{
/*
* Turtelizer2 has two LEDs connected to ACBUS2 and ACBUS3
*/
if (high_output & 0x08)
{
high_output = 0x04;
}
else
{
high_output = 0x08;
}
BUFFER_ADD = 0x82;
BUFFER_ADD = high_output;
BUFFER_ADD = high_direction;
}
int ft2232_quit(void)
{
#if BUILD_FT2232_FTD2XX == 1
FT_STATUS status;
status = FT_Close(ftdih);
#elif BUILD_FT2232_LIBFTDI == 1
ftdi_disable_bitbang(&ftdic);
ftdi_usb_close(&ftdic);
ftdi_deinit(&ftdic);
#endif
free(ft2232_buffer);
ft2232_buffer = NULL;
return ERROR_OK;
}
int ft2232_handle_device_desc_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
{
if (argc == 1)
{
ft2232_device_desc = strdup(args[0]);
}
else
{
LOG_ERROR("expected exactly one argument to ft2232_device_desc <description>");
}
return ERROR_OK;
}
int ft2232_handle_serial_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
{
if (argc == 1)
{
ft2232_serial = strdup(args[0]);
}
else
{
LOG_ERROR("expected exactly one argument to ft2232_serial <serial-number>");
}
return ERROR_OK;
}
int ft2232_handle_layout_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
{
if (argc == 0)
return ERROR_OK;
ft2232_layout = malloc(strlen(args[0]) + 1);
strcpy(ft2232_layout, args[0]);
return ERROR_OK;
}
int ft2232_handle_vid_pid_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
{
int i;
if (argc > MAX_USB_IDS * 2)
{
LOG_WARNING("ignoring extra IDs in ft2232_vid_pid "
"(maximum is %d pairs)", MAX_USB_IDS);
argc = MAX_USB_IDS * 2;
}
if ( argc < 2 || (argc & 1) )
{
LOG_WARNING("incomplete ft2232_vid_pid configuration directive");
if (argc < 2)
return ERROR_OK;
}
for (i = 0; i + 1 < argc; i += 2)
{
ft2232_vid[i >> 1] = strtol(args[i], NULL, 0);
ft2232_pid[i >> 1] = strtol(args[i + 1], NULL, 0);
}
/*
* Explicitly terminate, in case there are multiples instances of
* ft2232_vid_pid.
*/
ft2232_vid[i >> 1] = ft2232_pid[i >> 1] = 0;
return ERROR_OK;
}
int ft2232_handle_latency_command(struct command_context_s* cmd_ctx, char* cmd, char** args, int argc)
{
if (argc == 1)
{
ft2232_latency = atoi(args[0]);
}
else
{
LOG_ERROR("expected exactly one argument to ft2232_latency <ms>");
}
return ERROR_OK;
}
static int ft2232_stableclocks(int num_cycles, jtag_command_t* cmd)
{
int retval = 0;
/* 7 bits of either ones or zeros. */
u8 tms = (tap_get_state() == TAP_RESET ? 0x7F : 0x00);
while (num_cycles > 0)
{
/* the command 0x4b, "Clock Data to TMS/CS Pin (no Read)" handles
* at most 7 bits per invocation. Here we invoke it potentially
* several times.
*/
int bitcount_per_command = (num_cycles > 7) ? 7 : num_cycles;
if (ft2232_buffer_size + 3 >= FT2232_BUFFER_SIZE)
{
if (ft2232_send_and_recv(first_unsent, cmd) != ERROR_OK)
retval = ERROR_JTAG_QUEUE_FAILED;
first_unsent = cmd;
}
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
/* scan 7 bit */
BUFFER_ADD = bitcount_per_command - 1;
/* TMS data bits are either all zeros or ones to stay in the current stable state */
BUFFER_ADD = tms;
require_send = 1;
num_cycles -= bitcount_per_command;
}
return retval;
}
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