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Diffstat (limited to 'src/jtag/ftd2xx.c')
| -rw-r--r-- | src/jtag/ftd2xx.c | 1004 |
1 files changed, 1004 insertions, 0 deletions
diff --git a/src/jtag/ftd2xx.c b/src/jtag/ftd2xx.c new file mode 100644 index 00000000..c73c8d58 --- /dev/null +++ b/src/jtag/ftd2xx.c @@ -0,0 +1,1004 @@ +/*************************************************************************** + * 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; +} |