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openocd/src/jtag/drivers/presto.c

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/***************************************************************************
* 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. *
***************************************************************************/
/**
* @file
* Holds driver for PRESTO programmer from ASIX.
* http://tools.asix.net/prg_presto.htm
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if IS_CYGWIN == 1
#include "windows.h"
#endif
#include <jtag/interface.h>
#include <helper/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_adapter_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 USB serial number of Presto device.",
.usage = "serial_string",
},
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_adapter_khz,
.speed_div = presto_jtag_speed_div,
.init = presto_jtag_init,
.quit = presto_jtag_quit,
};
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