diff options
| -rw-r--r-- | src/jtag/presto.c | 118 |
1 files changed, 73 insertions, 45 deletions
diff --git a/src/jtag/presto.c b/src/jtag/presto.c index 624f1c7a..c8417c22 100644 --- a/src/jtag/presto.c +++ b/src/jtag/presto.c @@ -49,6 +49,8 @@ #include <ftd2xx.h> #elif BUILD_PRESTO_LIBFTDI == 1 #include <ftdi.h> +#else +#error "BUG: either FTD2XX and LIBFTDI has to be used" #endif @@ -236,82 +238,106 @@ int presto_open_ftd2xx(char *req_serial) if ((presto->status = FT_ListDevices(&numdevs, NULL, FT_LIST_NUMBER_ONLY)) != FT_OK) { ERROR("FT_ListDevices failed: %i", (int)presto->status); - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; } + DEBUG("FTDI devices available: %i", numdevs); for (i = 0; i < numdevs; i++) { - if (FT_Open(i, &(presto->handle)) != FT_OK) + if ((presto->status = FT_Open(i, &(presto->handle))) != FT_OK) { - ERROR("FT_Open failed: %i", (int)presto->status); + /* this is not fatal, the device may be legitimately open by other process, hence debug message only */ + DEBUG("FT_Open failed: %i", (int)presto->status); continue; } + DEBUG("FTDI device %i open", i); - if (FT_GetDeviceInfo(presto->handle, &device, &vidpid, - presto->serial, devname, NULL) == FT_OK) + 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 + DEBUG("FT_GetDeviceInfo failed: %i", presto->status); + DEBUG("FTDI device %i does not match, closing", i); FT_Close(presto->handle); presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE; } if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE) - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; /* presto not open, return */ + if ((presto->status = FT_SetLatencyTimer(presto->handle, 1)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; + + if ((presto->status = FT_SetTimeouts(presto->handle, 100, 0)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; + if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; - + return ERROR_JTAG_DEVICE_ERROR; + presto_data = 0xD0; if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; + 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_INIT_FAILED; - + return ERROR_JTAG_DEVICE_ERROR; + if (ftbytes!=1) { - if ((presto->status = FT_SetBitMode(presto->handle, 0x80, 1)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; + DEBUG("PRESTO reset"); + if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK) - return ERROR_JTAG_INIT_FAILED ; + 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_INIT_FAILED; + 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_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; usleep(100000); if ((presto->status = FT_SetBitMode(presto->handle, 0x00, 0)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; + if ((presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; - + return ERROR_JTAG_DEVICE_ERROR; + presto_data = 0xD0; if ((presto->status = FT_Write(presto->handle, &presto_data, 1, &ftbytes)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; + 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_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; + if (ftbytes!=1) - return ERROR_JTAG_INIT_FAILED; + { + DEBUG("PRESTO not responding"); + return ERROR_JTAG_DEVICE_ERROR; + } } - + if ((presto->status = FT_SetTimeouts(presto->handle, 0, 0)) != FT_OK) - return ERROR_JTAG_INIT_FAILED; - + return ERROR_JTAG_DEVICE_ERROR; + + presto->status = FT_Write(presto->handle, &presto_init_seq, sizeof(presto_init_seq), &ftbytes); - if (presto->status != FT_OK) - return ERROR_JTAG_INIT_FAILED; - if (ftbytes != sizeof(presto_init_seq)) - return ERROR_JTAG_INIT_FAILED; + if (presto->status != FT_OK || ftbytes != sizeof(presto_init_seq)) + return ERROR_JTAG_DEVICE_ERROR; return ERROR_OK; } @@ -328,32 +354,32 @@ int presto_open_libftdi(char *req_serial) if (ftdi_usb_open_desc(&presto->ftdic, PRESTO_VID, PRESTO_PID, NULL, req_serial) < 0) { ERROR("unable to open presto: %s", presto->ftdic.error_str); - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; } if (ftdi_usb_reset(&presto->ftdic) < 0) { ERROR("unable to reset presto device"); - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; } if (ftdi_set_latency_timer(&presto->ftdic, 1) < 0) { ERROR("unable to set latency timer"); - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; } if (ftdi_usb_purge_buffers(&presto->ftdic) < 0) { ERROR("unable to purge presto buffer"); - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; } presto_data = 0xD0; if ((presto->retval = presto_write(&presto_data, 1, &ftbytes)) != ERROR_OK) - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; if ((presto->retval = presto_read(&presto_data, 1, &ftbytes)) != ERROR_OK) - return ERROR_JTAG_INIT_FAILED; + return ERROR_JTAG_DEVICE_ERROR; return ERROR_OK; } @@ -386,23 +412,25 @@ int presto_close(void) int result = ERROR_OK; -#if BUID_PRESTO_FTD2XX == 1 +#if BUILD_PRESTO_FTD2XX == 1 unsigned long ftbytes; if (presto->handle == (FT_HANDLE)INVALID_HANDLE_VALUE) return result; - presto->status = FT_Write(presto->handle, &presto_init_seq, sizeof(presto_init_seq), &ftbytes); + presto->status = FT_Purge(presto->handle, FT_PURGE_TX | FT_PURGE_RX); if (presto->status != FT_OK) - result = PRST_ERR; - if (ftbytes != sizeof(presto_init_seq)) - result = PRST_TIMEOUT; + 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 = PRST_ERR; + result = ERROR_JTAG_DEVICE_ERROR; if ((presto->status = FT_Close(presto->handle)) != FT_OK) - result = PRST_ERR; + result = ERROR_JTAG_DEVICE_ERROR; else presto->handle = (FT_HANDLE)INVALID_HANDLE_VALUE; @@ -419,7 +447,7 @@ int presto_close(void) } ftdi_deinit(&presto->ftdic); - + #endif return result; |