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openocd/src/jtag/ftd2xx.c

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/***************************************************************************
* Copyright (C) 2004 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "config.h"
#if IS_CYGWIN == 1
#include "windows.h"
#undef ERROR
#endif
/* project specific includes */
#include "log.h"
#include "types.h"
#include "jtag.h"
#include "configuration.h"
/* system includes */
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ftd2xx.h>
#include <sys/time.h>
#include <time.h>
/* 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
/* enable this to work around ftd2xx deadlock
*/
#if 0
#define _FTD2XX_QUEUE_DELAY_
#endif
int ftd2xx_execute_queue(void);
int ftd2xx_speed(int speed);
int ftd2xx_register_commands(struct command_context_s *cmd_ctx);
int ftd2xx_init(void);
int ftd2xx_quit(void);
int ftd2xx_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int ftd2xx_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int ftd2xx_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
char *ftd2xx_device_desc = NULL;
char *ftd2xx_layout = NULL;
u16 ftd2xx_vid = 0x0403;
u16 ftd2xx_pid = 0x6010;
typedef struct ftd2xx_layout_s
{
char* name;
int(*init)(void);
void(*reset)(int trst, int srst);
} ftd2xx_layout_t;
int usbjtag_init(void);
int jtagkey_init(void);
void usbjtag_reset(int trst, int srst);
void jtagkey_reset(int trst, int srst);
ftd2xx_layout_t ftd2xx_layouts[] =
{
{"usbjtag", usbjtag_init, usbjtag_reset},
{"jtagkey", jtagkey_init, jtagkey_reset},
{"jtagkey_prototype_v1", jtagkey_init, jtagkey_reset},
{NULL, NULL, NULL},
};
static u8 nTRST, nTRSTnOE, nSRST, nSRSTnOE;
static ftd2xx_layout_t *layout;
static u8 low_output = 0x0;
static u8 low_direction = 0x0;
static u8 high_output = 0x0;
static u8 high_direction = 0x0;
static FT_HANDLE ftdih = NULL;
static u8 *ftd2xx_buffer = NULL;
static int ftd2xx_buffer_size = 0;
static int ftd2xx_read_pointer = 0;
static int ftd2xx_expect_read = 0;
#define FTD2XX_BUFFER_SIZE 131072
#define BUFFER_ADD ftd2xx_buffer[ftd2xx_buffer_size++]
#define BUFFER_READ ftd2xx_buffer[ftd2xx_read_pointer++]
jtag_interface_t ftd2xx_interface =
{
.name = "ftd2xx",
.execute_queue = ftd2xx_execute_queue,
.support_statemove = 1,
.speed = ftd2xx_speed,
.register_commands = ftd2xx_register_commands,
.init = ftd2xx_init,
.quit = ftd2xx_quit,
};
int ftd2xx_speed(int speed)
{
u8 buf[3];
FT_STATUS status;
DWORD bytes_written;
buf[0] = 0x86; /* command "set divisor" */
buf[1] = speed & 0xff; /* valueL (0=6MHz, 1=3MHz, 2=1.5MHz, ...*/
buf[2] = (speed >> 8) & 0xff; /* valueH */
DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if (((status = FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
{
ERROR("couldn't write to ftdi device: %i", status);
return status;
}
return ERROR_OK;
}
int ftd2xx_register_commands(struct command_context_s *cmd_ctx)
{
register_command(cmd_ctx, NULL, "ftd2xx_device_desc", ftd2xx_handle_device_desc_command,
COMMAND_CONFIG, NULL);
register_command(cmd_ctx, NULL, "ftd2xx_layout", ftd2xx_handle_layout_command,
COMMAND_CONFIG, NULL);
register_command(cmd_ctx, NULL, "ftd2xx_vid_pid", ftd2xx_handle_vid_pid_command,
COMMAND_CONFIG, NULL);
return ERROR_OK;
}
void ftd2xx_end_state(state)
{
if (tap_move_map[state] != -1)
end_state = state;
else
{
ERROR("BUG: %i is not a valid end state", state);
exit(-1);
}
}
void ftd2xx_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 ftd2xx_debug_dump_buffer(void)
{
int i;
char line[256];
char *line_p = line;
for (i = 0; i < ftd2xx_buffer_size; i++)
{
line_p += snprintf(line_p, 256 - (line_p - line), "%2.2x ", ftd2xx_buffer[i]);
if (i % 16 == 15)
{
DEBUG("%s", line);
line_p = line;
}
}
if (line_p != line)
DEBUG("%s", line);
}
int ftd2xx_send_and_recv(jtag_command_t *first, jtag_command_t *last)
{
jtag_command_t *cmd;
u8 *buffer;
int scan_size;
enum scan_type type;
FT_STATUS status;
DWORD bytes_written;
DWORD bytes_read;
#ifdef _DEBUG_USB_IO_
struct timeval start, inter, inter2, end;
#endif
#ifdef _DEBUG_USB_COMMS_
DEBUG("write buffer (size %i):", ftd2xx_buffer_size);
ftd2xx_debug_dump_buffer();
#endif
#ifdef _DEBUG_USB_IO_
gettimeofday(&start, NULL);
#endif
if ((status = FT_Write(ftdih, ftd2xx_buffer, ftd2xx_buffer_size, &bytes_written)) != FT_OK)
{
ERROR("couldn't write to ftdi device: %i", status);
exit(-1);
}
#ifdef _DEBUG_USB_IO_
gettimeofday(&inter, NULL);
#endif
if (ftd2xx_expect_read)
{
int timeout = 100;
ftd2xx_buffer_size = 0;
#ifdef _FTD2XX_QUEUE_DELAY_
DWORD inrxqueue = 0;
while (inrxqueue < ftd2xx_expect_read)
{
FT_GetQueueStatus(ftdih, &inrxqueue);
if (inrxqueue >= ftd2xx_expect_read)
break;
usleep(1000);
};
#endif
#ifdef _DEBUG_USB_IO_
gettimeofday(&inter2, NULL);
#endif
if ((status = FT_Read(ftdih, ftd2xx_buffer, ftd2xx_expect_read, &bytes_read)) != FT_OK)
{
ERROR("couldn't read from ftdi device: %i", status);
exit(-1);
}
#ifdef _DEBUG_USB_IO_
gettimeofday(&end, NULL);
INFO("inter: %i.%i, inter2: %i.%i end: %i.%i", inter.tv_sec - start.tv_sec, inter.tv_usec - start.tv_usec,
inter2.tv_sec - start.tv_sec, inter2.tv_usec - start.tv_usec,
end.tv_sec - start.tv_sec, end.tv_usec - start.tv_usec);
#endif
ftd2xx_buffer_size = bytes_read;
if (ftd2xx_expect_read != ftd2xx_buffer_size)
{
ERROR("ftd2xx_expect_read (%i) != ftd2xx_buffer_size (%i) (%i retries)", ftd2xx_expect_read, ftd2xx_buffer_size, 100 - timeout);
ftd2xx_debug_dump_buffer();
exit(-1);
}
#ifdef _DEBUG_USB_COMMS_
DEBUG("read buffer (%i retries): %i bytes", 100 - timeout, ftd2xx_buffer_size);
ftd2xx_debug_dump_buffer();
#endif
}
ftd2xx_expect_read = 0;
ftd2xx_read_pointer = 0;
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);
ftd2xx_read_scan(type, buffer, scan_size);
jtag_read_buffer(buffer, cmd->cmd.scan);
free(buffer);
}
break;
default:
break;
}
cmd = cmd->next;
}
ftd2xx_buffer_size = 0;
return ERROR_OK;
}
void ftd2xx_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;
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
/* scan 7 bit */
BUFFER_ADD = 0x6;
/* TMS data bits */
if (ir_scan)
{
BUFFER_ADD = TAP_MOVE(cur_state, TAP_SI);
cur_state = TAP_SI;
}
else
{
BUFFER_ADD = TAP_MOVE(cur_state, TAP_SD);
cur_state = TAP_SD;
}
//DEBUG("added TMS scan (no read)");
/* add command for complete bytes */
if (num_bytes > 1)
{
if (type == SCAN_IO)
{
/* Clock Data Bytes In and Out LSB First */
BUFFER_ADD = 0x39;
//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;
//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;
//DEBUG("added TDI bytes (i %i)", num_bytes);
}
BUFFER_ADD = (num_bytes-2) & 0xff;
BUFFER_ADD = (num_bytes >> 8) & 0xff;
}
if (type != SCAN_IN)
{
/* add complete bytes */
while(num_bytes-- > 1)
{
BUFFER_ADD = buffer[cur_byte];
cur_byte++;
bits_left -= 8;
}
}
if (type == SCAN_IN)
{
bits_left -= 8 * (num_bytes - 1);
}
/* 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;
//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;
//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;
//DEBUG("added TDI bits (i %i)", bits_left - 1);
}
BUFFER_ADD = bits_left - 2;
if (type != SCAN_IN)
BUFFER_ADD = buffer[cur_byte];
}
/* move from Shift-IR/DR to end state */
if (type != SCAN_OUT)
{
/* Clock Data to TMS/CS Pin with Read */
BUFFER_ADD = 0x6b;
//DEBUG("added TMS scan (read)");
}
else
{
/* Clock Data to TMS/CS Pin (no Read) */
BUFFER_ADD = 0x4b;
//DEBUG("added TMS scan (no read)");
}
BUFFER_ADD = 0x6;
BUFFER_ADD = TAP_MOVE(cur_state, end_state) | (last_bit << 7);
cur_state = end_state;
}
int ftd2xx_predict_scan_out(int scan_size, enum scan_type type)
{
int predicted_size = 6;
if (type == SCAN_IN) /* only from device to host */
{
predicted_size += (CEIL(scan_size, 8) > 1) ? 3 : 0;
predicted_size += ((scan_size - 1) % 8) ? 2 : 0;
}
else /* host to device, or bidirectional */
{
predicted_size += (CEIL(scan_size, 8) > 1) ? (CEIL(scan_size, 8) + 3 - 1) : 0;
predicted_size += ((scan_size - 1) % 8) ? 3 : 0;
}
return predicted_size;
}
int ftd2xx_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;
}
//DEBUG("scan_size: %i, predicted_size: %i", scan_size, predicted_size);
return predicted_size;
}
void usbjtag_reset(int trst, int srst)
{
if (trst == 1)
{
cur_state = TAP_TLR;
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)
{
cur_state = TAP_TLR;
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;
DEBUG("trst: %i, srst: %i, high_output: 0x%2.2x, high_direction: 0x%2.2x", trst, srst, high_output, high_direction);
}
int ftd2xx_execute_queue()
{
jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
jtag_command_t *first_unsent = cmd; /* next command that has to be sent */
u8 *buffer;
int scan_size; /* size of IR or DR scan */
enum scan_type type;
int i;
int predicted_size = 0;
int require_send = 0;
ftd2xx_buffer_size = 0;
ftd2xx_expect_read = 0;
while (cmd)
{
switch(cmd->type)
{
case JTAG_END_STATE:
if (cmd->cmd.end_state->end_state != -1)
ftd2xx_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 (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
{
ftd2xx_send_and_recv(first_unsent, cmd);
require_send = 0;
first_unsent = cmd;
}
layout->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
require_send = 1;
break;
case JTAG_RUNTEST:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 0;
if (cur_state != TAP_RTI)
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_RTI))
predicted_size += 3;
if ((cmd->cmd.runtest->end_state == -1) && (end_state != TAP_RTI))
predicted_size += 3;
if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
{
ftd2xx_send_and_recv(first_unsent, cmd);
require_send = 0;
first_unsent = cmd;
}
if (cur_state != TAP_RTI)
{
/* command "Clock Data to TMS/CS Pin (no Read)" */
BUFFER_ADD = 0x4b;
/* scan 7 bit */
BUFFER_ADD = 0x6;
/* TMS data bits */
BUFFER_ADD = TAP_MOVE(cur_state, TAP_RTI);
cur_state = TAP_RTI;
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 bit */
BUFFER_ADD = (i > 7) ? 6 : (i - 1);
/* TMS data bits */
BUFFER_ADD = 0x0;
cur_state = TAP_RTI;
i -= (i > 7) ? 7 : i;
//DEBUG("added TMS scan (no read)");
}
if (cmd->cmd.runtest->end_state != -1)
ftd2xx_end_state(cmd->cmd.runtest->end_state);
if (cur_state != 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_MOVE(cur_state, end_state);
cur_state = end_state;
//DEBUG("added TMS scan (no read)");
}
require_send = 1;
break;
case JTAG_STATEMOVE:
/* only send the maximum buffer size that FT2232C can handle */
predicted_size = 3;
if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
{
ftd2xx_send_and_recv(first_unsent, cmd);
require_send = 0;
first_unsent = cmd;
}
if (cmd->cmd.statemove->end_state != -1)
ftd2xx_end_state(cmd->cmd.statemove->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_MOVE(cur_state, end_state);
//DEBUG("added TMS scan (no read)");
cur_state = end_state;
require_send = 1;
break;
case JTAG_SCAN:
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
type = jtag_scan_type(cmd->cmd.scan);
predicted_size = ftd2xx_predict_scan_out(scan_size, type);
if (ftd2xx_buffer_size + predicted_size + 1 > FTD2XX_BUFFER_SIZE)
{
DEBUG("ftd2xx buffer size reached, sending queued commands (first_unsent: %x, cmd: %x)", first_unsent, cmd);
ftd2xx_send_and_recv(first_unsent, cmd);
require_send = 0;
first_unsent = cmd;
}
ftd2xx_expect_read += ftd2xx_predict_scan_in(scan_size, type);
//DEBUG("new read size: %i", ftd2xx_expect_read);
if (cmd->cmd.scan->end_state != -1)
ftd2xx_end_state(cmd->cmd.scan->end_state);
ftd2xx_add_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
require_send = 1;
if (buffer)
free(buffer);
break;
case JTAG_SLEEP:
ftd2xx_send_and_recv(first_unsent, cmd);
first_unsent = cmd->next;
jtag_sleep(cmd->cmd.sleep->us);
break;
default:
ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
}
cmd = cmd->next;
}
if (require_send > 0)
ftd2xx_send_and_recv(first_unsent, cmd);
return ERROR_OK;
}
int ftd2xx_init(void)
{
u8 latency_timer;
FT_STATUS status;
DWORD num_devices;
ftd2xx_layout_t *cur_layout = ftd2xx_layouts;
if ((ftd2xx_layout == NULL) || (ftd2xx_layout[0] == 0))
{
ftd2xx_layout = "usbjtag";
WARNING("No ftd2xx layout specified, using default 'usbjtag'");
}
while (cur_layout->name)
{
if (strcmp(cur_layout->name, ftd2xx_layout) == 0)
{
layout = cur_layout;
break;
}
cur_layout++;
}
if (!layout)
{
ERROR("No matching layout found for %s", ftd2xx_layout);
return ERROR_JTAG_INIT_FAILED;
}
if (ftd2xx_device_desc == NULL)
{
WARNING("no ftd2xx device description specified, using default 'Dual RS232'");
ftd2xx_device_desc = "Dual RS232";
}
#if IS_CYGWIN != 1
/* Add JTAGkey Vid/Pid to the linux driver */
if ((status = FT_SetVIDPID(ftd2xx_vid, ftd2xx_pid)) != FT_OK)
{
WARNING("couldn't add %4.4x:%4.4x", ftd2xx_vid, ftd2xx_pid);
}
#endif
if ((status = FT_OpenEx(ftd2xx_device_desc, FT_OPEN_BY_DESCRIPTION, &ftdih)) != FT_OK)
{
ERROR("unable to open ftdi device: %i", 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 | FT_OPEN_BY_DESCRIPTION);
if (status == FT_OK)
{
ERROR("ListDevices: %d\n", num_devices);
for (i = 0; i < num_devices; i++)
ERROR("%i: %s", i, desc_array[i]);
}
for (i = 0; i < num_devices; i++)
free(desc_array[i]);
free(desc_array);
}
else
{
printf("ListDevices: NONE\n");
}
return ERROR_JTAG_INIT_FAILED;
}
if ((status = FT_SetLatencyTimer(ftdih, 2)) != FT_OK)
{
ERROR("unable to set latency timer: %i", status);
return ERROR_JTAG_INIT_FAILED;
}
if ((status = FT_GetLatencyTimer(ftdih, &latency_timer)) != FT_OK)
{
ERROR("unable to get latency timer: %i", status);
return ERROR_JTAG_INIT_FAILED;
}
else
{
DEBUG("current latency timer: %i", latency_timer);
}
if ((status = FT_SetBitMode(ftdih, 0x0b, 2)) != FT_OK)
{
ERROR("unable to enable bit i/o mode: %i", status);
return ERROR_JTAG_INIT_FAILED;
}
ftd2xx_buffer_size = 0;
ftd2xx_buffer = malloc(FTD2XX_BUFFER_SIZE);
if (layout->init() != ERROR_OK)
return ERROR_JTAG_INIT_FAILED;
ftd2xx_speed(jtag_speed);
if ((status = FT_Purge(ftdih, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK)
{
ERROR("error purging ftd2xx device: %i", status);
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int usbjtag_init(void)
{
u8 buf[3];
FT_STATUS status;
DWORD bytes_written;
low_output = 0x08;
low_direction = 0x0b;
nTRST = 0x10;
nTRSTnOE = 0x10;
nSRST = 0x40;
nSRSTnOE = 0x40;
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 */
DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if (((FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
{
ERROR("couldn't write to ftdi device: %i", status);
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int jtagkey_init(void)
{
u8 buf[3];
FT_STATUS status;
DWORD 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 */
DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if (((FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
{
ERROR("couldn't write to ftdi device: %i", status);
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)
{
nTRST = 0x02;
nTRSTnOE = 0x1;
nSRST = 0x08;
nSRSTnOE = 0x04;
}
else
{
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 low byte" */
buf[1] = high_output; /* value */
buf[2] = high_direction; /* all outputs (xRST and xRSTnOE) */
DEBUG("%2.2x %2.2x %2.2x", buf[0], buf[1], buf[2]);
if (((FT_Write(ftdih, buf, 3, &bytes_written)) != FT_OK) || (bytes_written != 3))
{
ERROR("couldn't write to ftdi device: %i", status);
return ERROR_JTAG_INIT_FAILED;
}
return ERROR_OK;
}
int ftd2xx_quit(void)
{
FT_STATUS status;
status = FT_Close(ftdih);
free(ftd2xx_buffer);
return ERROR_OK;
}
int ftd2xx_handle_device_desc_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 1)
{
ftd2xx_device_desc = strdup(args[0]);
}
else
{
ERROR("expected exactly one argument to ftd2xx_device_desc <description>");
}
return ERROR_OK;
}
int ftd2xx_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 0)
return ERROR_OK;
ftd2xx_layout = malloc(strlen(args[0]));
strcpy(ftd2xx_layout, args[0]);
return ERROR_OK;
}
int ftd2xx_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc >= 2)
{
ftd2xx_vid = strtol(args[0], NULL, 0);
ftd2xx_pid = strtol(args[1], NULL, 0);
}
else
{
WARNING("incomplete ftd2xx_vid_pid configuration directive");
}
return ERROR_OK;
}
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