diff options
Diffstat (limited to 'src/jtag/drivers/presto.c')
| -rw-r--r-- | src/jtag/drivers/presto.c | 800 |
1 files changed, 800 insertions, 0 deletions
diff --git a/src/jtag/drivers/presto.c b/src/jtag/drivers/presto.c new file mode 100644 index 00000000..f4e689c2 --- /dev/null +++ b/src/jtag/drivers/presto.c @@ -0,0 +1,800 @@ +/*************************************************************************** + * Copyright (C) 2007 by Pavel Chromy * + * chromy@asix.cz * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#if IS_CYGWIN == 1 +#include "windows.h" +#endif + +#include "interface.h" +#include "time_support.h" +#include "bitq.h" + + +/* PRESTO access library includes */ +#if BUILD_PRESTO_FTD2XX == 1 +#include <ftd2xx.h> +#elif BUILD_PRESTO_LIBFTDI == 1 +#include <ftdi.h> +#else +#error "BUG: either FTD2XX and LIBFTDI has to be used" +#endif + +/* -------------------------------------------------------------------------- */ + +#define FT_DEVICE_NAME_LEN 64 +#define FT_DEVICE_SERNUM_LEN 64 + +#define PRESTO_VID_PID 0x0403f1a0 +#define PRESTO_VID (0x0403) +#define PRESTO_PID (0xf1a0) + +#define BUFFER_SIZE (64*62) + +struct presto { +#if BUILD_PRESTO_FTD2XX == 1 + FT_HANDLE handle; + FT_STATUS status; +#elif BUILD_PRESTO_LIBFTDI == 1 + struct ftdi_context ftdic; + int retval; +#endif + + char serial[FT_DEVICE_SERNUM_LEN]; + + uint8_t buff_out[BUFFER_SIZE]; + int buff_out_pos; + + uint8_t buff_in[BUFFER_SIZE]; + int buff_in_exp; /* expected in buffer length */ + int buff_in_len; /* length of data received */ + int buff_in_pos; + + unsigned long total_out; + unsigned long total_in; + + int jtag_tms; /* last tms state */ + int jtag_tck; /* last tck state */ + int jtag_rst; /* last trst state */ + + int jtag_tdi_data; + int jtag_tdi_count; + + int jtag_speed; +}; + +static struct presto presto_state; +static struct presto *presto = &presto_state; + +static uint8_t presto_init_seq[] = +{ + 0x80, 0xA0, 0xA8, 0xB0, 0xC0, 0xE0 +}; + +static int presto_write(uint8_t *buf, uint32_t size) +{ +#if BUILD_PRESTO_FTD2XX == 1 + DWORD ftbytes; + if ((presto->status = FT_Write(presto->handle, buf, size, &ftbytes)) != FT_OK) + { + LOG_ERROR("FT_Write returned: %lu", presto->status); + return ERROR_JTAG_DEVICE_ERROR; + } + +#elif BUILD_PRESTO_LIBFTDI == 1 + uint32_t ftbytes; + if ((presto->retval = ftdi_write_data(&presto->ftdic, buf, size)) < 0) + { + LOG_ERROR("ftdi_write_data: %s", ftdi_get_error_string(&presto->ftdic)); + return ERROR_JTAG_DEVICE_ERROR; + } + ftbytes = presto->retval; +#endif + + if (ftbytes != size) + { + LOG_ERROR("couldn't write the requested number of bytes to PRESTO (%u < %u)", + (unsigned)ftbytes, (unsigned)size); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} + +static int presto_read(uint8_t* buf, uint32_t size) +{ +#if BUILD_PRESTO_FTD2XX == 1 + DWORD ftbytes; + if ((presto->status = FT_Read(presto->handle, buf, size, &ftbytes)) != FT_OK) + { + LOG_ERROR("FT_Read returned: %lu", presto->status); + return ERROR_JTAG_DEVICE_ERROR; + } + +#elif BUILD_PRESTO_LIBFTDI == 1 + uint32_t ftbytes = 0; + + struct timeval timeout, now; + gettimeofday(&timeout, NULL); + timeval_add_time(&timeout, 1, 0); /* one second timeout */ + + while (ftbytes < size) + { + if ((presto->retval = ftdi_read_data(&presto->ftdic, buf + ftbytes, size - ftbytes)) < 0) + { + LOG_ERROR("ftdi_read_data: %s", ftdi_get_error_string(&presto->ftdic)); + return ERROR_JTAG_DEVICE_ERROR; + } + ftbytes += presto->retval; + + gettimeofday(&now, NULL); + if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec) && (now.tv_usec > timeout.tv_usec))) + break; + } +#endif + + if (ftbytes != size) + { + /* this is just a warning, there might have been timeout when detecting PRESTO, which is not fatal */ + LOG_WARNING("couldn't read the requested number of bytes from PRESTO (%u < %u)", + (unsigned)ftbytes, (unsigned)size); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} + +#if BUILD_PRESTO_FTD2XX == 1 +static int presto_open_ftd2xx(char *req_serial) +{ + uint32_t i; + DWORD numdevs; + DWORD vidpid; + char devname[FT_DEVICE_NAME_LEN]; + FT_DEVICE device; + + BYTE presto_data; + DWORD ftbytes; + + presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE; + +#if IS_WIN32 == 0 + /* Add non-standard Vid/Pid to the linux driver */ + if ((presto->status = FT_SetVIDPID(PRESTO_VID, PRESTO_PID)) != FT_OK) + { + LOG_ERROR("couldn't add PRESTO VID/PID"); + exit(-1); + } +#endif + + if ((presto->status = FT_ListDevices(&numdevs, NULL, FT_LIST_NUMBER_ONLY)) != FT_OK) + { + LOG_ERROR("FT_ListDevices failed: %i", (int)presto->status); + return ERROR_JTAG_DEVICE_ERROR; + } + + LOG_DEBUG("FTDI devices available: %lu", numdevs); + for (i = 0; i < numdevs; i++) + { + if ((presto->status = FT_Open(i, &(presto->handle))) != FT_OK) + { + /* this is not fatal, the device may be legitimately open by other process, hence debug message only */ + LOG_DEBUG("FT_Open failed: %i", (int)presto->status); + continue; + } + LOG_DEBUG("FTDI device %i open", (int)i); + + if ((presto->status = FT_GetDeviceInfo(presto->handle, &device, &vidpid, + presto->serial, devname, NULL)) == FT_OK) + { + if (vidpid == PRESTO_VID_PID + && (req_serial == NULL || !strcmp(presto->serial, req_serial))) + break; + } + else + LOG_DEBUG("FT_GetDeviceInfo failed: %lu", presto->status); + + LOG_DEBUG("FTDI device %i does not match, closing", (int)i); + FT_Close(presto->handle); + presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE; + } + + if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE) + return ERROR_JTAG_DEVICE_ERROR; /* presto not open, return */ + + if ((presto->status = FT_SetLatencyTimer(presto->handle, 1)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + + if ((presto->status = FT_SetTimeouts(presto->handle, 100, 0)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + presto_data = 0xD0; + if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + /* delay between first write/read turnaround (after purge?) necessary under Linux for unknown reason, + probably a bug in library threading */ + usleep(100000); + if ((presto->status = FT_Read(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + if (ftbytes != 1) + { + LOG_DEBUG("PRESTO reset"); + + if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + if ((presto->status = FT_SetBitMode(presto->handle, 0x80, 1)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + if ((presto->status = FT_SetBaudRate(presto->handle, 9600)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + presto_data = 0; + for (i = 0; i < 4 * 62; i++) + if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + usleep(100000); + + if ((presto->status = FT_SetBitMode(presto->handle, 0x00, 0)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + presto_data = 0xD0; + if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + /* delay between first write/read turnaround (after purge?) necessary under Linux for unknown reason, + probably a bug in library threading */ + usleep(100000); + if ((presto->status = FT_Read(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + if (ftbytes != 1) + { + LOG_DEBUG("PRESTO not responding"); + return ERROR_JTAG_DEVICE_ERROR; + } + } + + if ((presto->status = FT_SetTimeouts(presto->handle, 0, 0)) != FT_OK) + return ERROR_JTAG_DEVICE_ERROR; + + + presto->status = FT_Write(presto->handle, &presto_init_seq, sizeof(presto_init_seq), &ftbytes); + if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq)) + return ERROR_JTAG_DEVICE_ERROR; + + return ERROR_OK; +} + +#elif BUILD_PRESTO_LIBFTDI == 1 +static int presto_open_libftdi(char *req_serial) +{ + uint8_t presto_data; + + LOG_DEBUG("searching for PRESTO using libftdi"); + + /* initialize FTDI context structure */ + if (ftdi_init(&presto->ftdic) < 0) + { + LOG_ERROR("unable to init libftdi: %s", presto->ftdic.error_str); + return ERROR_JTAG_DEVICE_ERROR; + } + + /* context, vendor id, product id */ + if (ftdi_usb_open_desc(&presto->ftdic, PRESTO_VID, PRESTO_PID, NULL, req_serial) < 0) + { + LOG_ERROR("unable to open PRESTO: %s", presto->ftdic.error_str); + return ERROR_JTAG_DEVICE_ERROR; + } + + if (ftdi_usb_reset(&presto->ftdic) < 0) + { + LOG_ERROR("unable to reset PRESTO device"); + return ERROR_JTAG_DEVICE_ERROR; + } + + if (ftdi_set_latency_timer(&presto->ftdic, 1) < 0) + { + LOG_ERROR("unable to set latency timer"); + return ERROR_JTAG_DEVICE_ERROR; + } + + if (ftdi_usb_purge_buffers(&presto->ftdic) < 0) + { + LOG_ERROR("unable to purge PRESTO buffers"); + return ERROR_JTAG_DEVICE_ERROR; + } + + presto_data = 0xD0; + if (presto_write(&presto_data, 1) != ERROR_OK) + { + LOG_ERROR("error writing to PRESTO"); + return ERROR_JTAG_DEVICE_ERROR; + } + + if (presto_read(&presto_data, 1) != ERROR_OK) + { + LOG_DEBUG("no response from PRESTO, retrying"); + + if (ftdi_usb_purge_buffers(&presto->ftdic) < 0) + return ERROR_JTAG_DEVICE_ERROR; + + presto_data = 0xD0; + if (presto_write(&presto_data, 1) != ERROR_OK) + return ERROR_JTAG_DEVICE_ERROR; + + if (presto_read(&presto_data, 1) != ERROR_OK) + { + LOG_ERROR("no response from PRESTO, giving up"); + return ERROR_JTAG_DEVICE_ERROR; + } + } + + if (presto_write(presto_init_seq, sizeof(presto_init_seq)) != ERROR_OK) + { + LOG_ERROR("error writing PRESTO init sequence"); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} +#endif /* BUILD_PRESTO_LIBFTDI == 1 */ + +static int presto_open(char *req_serial) +{ + presto->buff_out_pos = 0; + presto->buff_in_pos = 0; + presto->buff_in_len = 0; + presto->buff_in_exp = 0; + + presto->total_out = 0; + presto->total_in = 0; + + presto->jtag_tms = 0; + presto->jtag_tck = 0; + presto->jtag_rst = 0; + presto->jtag_tdi_data = 0; + presto->jtag_tdi_count = 0; + + presto->jtag_speed = 0; + +#if BUILD_PRESTO_FTD2XX == 1 + return presto_open_ftd2xx(req_serial); +#elif BUILD_PRESTO_LIBFTDI == 1 + return presto_open_libftdi(req_serial); +#endif +} + +static int presto_close(void) +{ + + int result = ERROR_OK; + +#if BUILD_PRESTO_FTD2XX == 1 + unsigned long ftbytes; + + if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE) + return result; + + presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX); + if (presto->status != FT_OK) + result = ERROR_JTAG_DEVICE_ERROR; + + presto->status = FT_Write(presto->handle, &presto_init_seq, sizeof(presto_init_seq), &ftbytes); + if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq)) + result = ERROR_JTAG_DEVICE_ERROR; + + if ((presto->status = FT_SetLatencyTimer(presto->handle, 16)) != FT_OK) + result = ERROR_JTAG_DEVICE_ERROR; + + if ((presto->status = FT_Close(presto->handle)) != FT_OK) + result = ERROR_JTAG_DEVICE_ERROR; + else + presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE; + +#elif BUILD_PRESTO_LIBFTDI == 1 + + if ((presto->retval = ftdi_write_data(&presto->ftdic, presto_init_seq, sizeof(presto_init_seq))) != sizeof(presto_init_seq)) + result = ERROR_JTAG_DEVICE_ERROR; + + if ((presto->retval = ftdi_set_latency_timer(&presto->ftdic, 16)) < 0) + result = ERROR_JTAG_DEVICE_ERROR; + + if ((presto->retval = ftdi_usb_close(&presto->ftdic)) < 0) + result = ERROR_JTAG_DEVICE_ERROR; + else + ftdi_deinit(&presto->ftdic); +#endif + + return result; +} + +static int presto_flush(void) +{ + if (presto->buff_out_pos == 0) + return ERROR_OK; + +#if BUILD_PRESTO_FTD2XX == 1 + if (presto->status != FT_OK) +#elif BUILD_PRESTO_LIBFTDI == 1 + if (presto->retval < 0) +#endif + { + LOG_DEBUG("error in previous communication, canceling I/O operation"); + return ERROR_JTAG_DEVICE_ERROR; + } + + if (presto_write(presto->buff_out, presto->buff_out_pos) != ERROR_OK) + { + presto->buff_out_pos = 0; + return ERROR_JTAG_DEVICE_ERROR; + } + + presto->total_out += presto->buff_out_pos; + presto->buff_out_pos = 0; + + if (presto->buff_in_exp == 0) + return ERROR_OK; + + presto->buff_in_pos = 0; + presto->buff_in_len = 0; + + if (presto_read(presto->buff_in, presto->buff_in_exp) != ERROR_OK) + { + presto->buff_in_exp = 0; + return ERROR_JTAG_DEVICE_ERROR; + } + + presto->total_in += presto->buff_in_exp; + presto->buff_in_len = presto->buff_in_exp; + presto->buff_in_exp = 0; + + return ERROR_OK; +} + +static int presto_sendbyte(int data) +{ + if (data == EOF) return presto_flush(); + + if (presto->buff_out_pos < BUFFER_SIZE) + { + presto->buff_out[presto->buff_out_pos++] = (uint8_t)data; + if (((data & 0xC0) == 0x40) || ((data & 0xD0)== 0xD0)) + presto->buff_in_exp++; + } + else + return ERROR_JTAG_DEVICE_ERROR; + +#if BUILD_PRESTO_FTD2XX == 1 + if (presto->buff_out_pos >= BUFFER_SIZE) +#elif BUILD_PRESTO_LIBFTDI == 1 + /* libftdi does not do background read, be sure that USB IN buffer does not overflow (128 bytes only!) */ + if (presto->buff_out_pos >= BUFFER_SIZE || presto->buff_in_exp == 128) +#endif + return presto_flush(); + + return ERROR_OK; +} + +#if 0 +static int presto_getbyte(void) +{ + if (presto->buff_in_pos < presto->buff_in_len) + return presto->buff_in[presto->buff_in_pos++]; + + if (presto->buff_in_exp == 0) + return -1; + + if (presto_flush() != ERROR_OK) + return -1; + + if (presto->buff_in_pos < presto->buff_in_len) + return presto->buff_in[presto->buff_in_pos++]; + + return -1; +} +#endif + +/* -------------------------------------------------------------------------- */ + +static int presto_tdi_flush(void) +{ + if (presto->jtag_tdi_count == 0) + return 0; + + if (presto->jtag_tck == 0) + { + LOG_ERROR("BUG: unexpected TAP condition, TCK low"); + return -1; + } + + presto->jtag_tdi_data |= (presto->jtag_tdi_count - 1) << 4; + presto_sendbyte(presto->jtag_tdi_data); + presto->jtag_tdi_count = 0; + presto->jtag_tdi_data = 0; + + return 0; +} + +static int presto_tck_idle(void) +{ + if (presto->jtag_tck == 1) + { + presto_sendbyte(0xCA); + presto->jtag_tck = 0; + } + + return 0; +} + +/* -------------------------------------------------------------------------- */ + +static int presto_bitq_out(int tms, int tdi, int tdo_req) +{ + int i; + unsigned char cmd; + + if (presto->jtag_tck == 0) + { + presto_sendbyte(0xA4); /* LED idicator - JTAG active */ + } + else if (presto->jtag_speed == 0 && !tdo_req && tms == presto->jtag_tms) + { + presto->jtag_tdi_data |= (tdi != 0) << presto->jtag_tdi_count; + + if (++presto->jtag_tdi_count == 4) + presto_tdi_flush(); + + return 0; + } + + presto_tdi_flush(); + + cmd = tdi ? 0xCB : 0xCA; + presto_sendbyte(cmd); + + if (tms != presto->jtag_tms) + { + presto_sendbyte((tms ? 0xEC : 0xE8) | (presto->jtag_rst ? 0x02 : 0)); + presto->jtag_tms = tms; + } + + /* delay with TCK low */ + for (i = presto->jtag_speed; i > 1; i--) + presto_sendbyte(cmd); + + cmd |= 0x04; + presto_sendbyte(cmd | (tdo_req ? 0x10 : 0)); + + /* delay with TCK high */ + for (i = presto->jtag_speed; i > 1; i--) + presto_sendbyte(cmd); + + presto->jtag_tck = 1; + + return 0; +} + +static int presto_bitq_flush(void) +{ + presto_tdi_flush(); + presto_tck_idle(); + + presto_sendbyte(0xA0); /* LED idicator - JTAG idle */ + + return presto_flush(); +} + +static int presto_bitq_in_rdy(void) +{ + if (presto->buff_in_pos >= presto->buff_in_len) + return 0; + return presto->buff_in_len-presto->buff_in_pos; +} + +static int presto_bitq_in(void) +{ + if (presto->buff_in_pos >= presto->buff_in_len) + return -1; + if (presto->buff_in[presto->buff_in_pos++]&0x08) return 1; + return 0; +} + +static int presto_bitq_sleep(unsigned long us) +{ + long waits; + + presto_tdi_flush(); + presto_tck_idle(); + + if (us > 100000) + { + presto_bitq_flush(); + jtag_sleep(us); + return 0; + } + + waits = us / 170 + 2; + while (waits--) + presto_sendbyte(0x80); + + return 0; +} + +static int presto_bitq_reset(int trst, int srst) +{ + presto_tdi_flush(); + presto_tck_idle(); + + /* add a delay after possible TCK transition */ + presto_sendbyte(0x80); + presto_sendbyte(0x80); + + presto->jtag_rst = trst || srst; + presto_sendbyte((presto->jtag_rst ? 0xEA : 0xE8) | (presto->jtag_tms ? 0x04 : 0)); + + return 0; +} + +static struct bitq_interface presto_bitq = { + .out = &presto_bitq_out, + .flush = &presto_bitq_flush, + .sleep = &presto_bitq_sleep, + .reset = &presto_bitq_reset, + .in_rdy = &presto_bitq_in_rdy, + .in = &presto_bitq_in, + }; + +/* -------------------------------------------------------------------------- */ + +static int presto_jtag_khz(int khz, int *jtag_speed) +{ + if (khz < 0) + { + *jtag_speed = 0; + return ERROR_INVALID_ARGUMENTS; + } + + if (khz >= 3000) *jtag_speed = 0; + else *jtag_speed = (1000 + khz-1)/khz; + + return 0; +} + +static int presto_jtag_speed_div(int speed, int *khz) +{ + if ((speed < 0) || (speed > 1000)) + { + *khz = 0; + return ERROR_INVALID_ARGUMENTS; + } + + if (speed == 0) *khz = 3000; + else *khz = 1000/speed; + + return 0; +} + +static int presto_jtag_speed(int speed) +{ + int khz; + + if (presto_jtag_speed_div(speed, &khz)) + { + return ERROR_INVALID_ARGUMENTS; + } + + presto->jtag_speed = speed; + + if (khz%1000 == 0) + LOG_INFO("setting speed to %d, max. TCK freq. is %d MHz", speed, khz/1000); + else + LOG_INFO("setting speed to %d, max. TCK freq. is %d kHz", speed, khz); + + return 0; +} + +static char *presto_serial; + +COMMAND_HANDLER(presto_handle_serial_command) +{ + if (CMD_ARGC == 1) + { + if (presto_serial) + free(presto_serial); + presto_serial = strdup(CMD_ARGV[0]); + } + else + { + LOG_ERROR("expected exactly one argument to presto_serial <serial-number>"); + } + + return ERROR_OK; +} + +static const struct command_registration presto_command_handlers[] = { + { + .name = "presto_serial", + .handler = &presto_handle_serial_command, + .mode = COMMAND_CONFIG, + .help = "configure serial port", + .usage = "<devname>", + }, + COMMAND_REGISTRATION_DONE +}; + +static int presto_jtag_init(void) +{ + if (presto_open(presto_serial) != ERROR_OK) + { + presto_close(); + if (presto_serial != NULL) + LOG_ERROR("Cannot open PRESTO, serial number '%s'", presto_serial); + else + LOG_ERROR("Cannot open PRESTO"); + return ERROR_JTAG_INIT_FAILED; + } + LOG_INFO("PRESTO open, serial number '%s'", presto->serial); + + /* use JTAG speed setting from configuration file */ + presto_jtag_speed(jtag_get_speed()); + + bitq_interface = &presto_bitq; + return ERROR_OK; +} + +static int presto_jtag_quit(void) +{ + bitq_cleanup(); + presto_close(); + LOG_INFO("PRESTO closed"); + + if (presto_serial) + { + free(presto_serial); + presto_serial = NULL; + } + + return ERROR_OK; +} + +struct jtag_interface presto_interface = { + .name = "presto", + + .commands = presto_command_handlers, + + .execute_queue = &bitq_execute_queue, + .speed = &presto_jtag_speed, + .khz = &presto_jtag_khz, + .speed_div = &presto_jtag_speed_div, + + .init = &presto_jtag_init, + .quit = &presto_jtag_quit, + }; |