X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/usb-driver/blobdiff_plain/3cc5a0bc5aff472da5f6ad0df3eb108eae229dae..0915c0b59cf76f9c83d35931bc2613eadf0c9bb7:/jtagkey.c diff --git a/jtagkey.c b/jtagkey.c index e17afc8..d068cf5 100644 --- a/jtagkey.c +++ b/jtagkey.c @@ -2,15 +2,35 @@ #include #include #include +#include #include "usb-driver.h" #include "config.h" #include "jtagkey.h" +#include "jtagmon.h" #define USBBUFSIZE 1048576 -#define SLOW_AND_SAFE 1 +#define JTAG_SPEED 100000 +#define BULK_LATENCY 2 +#define OTHER_LATENCY 1 static struct ftdi_context ftdic; -static unsigned char bitbang_mode; + +static int jtagkey_latency(int latency) { + static int current = 0; + int ret; + + if (current != latency) { + DPRINTF("switching latency\n"); + if ((ret = ftdi_set_latency_timer(&ftdic, latency)) != 0) { + fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + current = latency; + } + + return ret; +} static int jtagkey_init(unsigned short vid, unsigned short pid) { int ret = 0; @@ -46,15 +66,8 @@ static int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } - if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { - fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + if ((ret = jtagkey_latency(OTHER_LATENCY)) != 0) return ret; - } - - if ((ret = ftdi_set_baudrate(&ftdic, 500000)) != 0) { - fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); - return ret; - } c = 0x00; ftdi_write_data(&ftdic, &c, 1); @@ -64,7 +77,10 @@ static int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } - bitbang_mode = BITMODE_SYNCBB; + if ((ret = ftdi_set_baudrate(&ftdic, JTAG_SPEED)) != 0) { + fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); @@ -93,34 +109,8 @@ void jtagkey_close(int handle) { } } -#ifndef SLOW_AND_SAFE -static int jtagkey_set_bbmode(unsigned char mode) { - int ret = 0; - - if (bitbang_mode != mode) { - DPRINTF("switching bitbang-mode!\n"); - - /* Wait for the latency-timer to kick in */ - usleep(2); - if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, mode)) != 0) { - fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); - return ret; - } - if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { - fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); - return ret; - } - /* Wait for the FTDI2232 to settle */ - usleep(2); - - bitbang_mode = mode; - } - - return ret; -} -#endif - -void jtagkey_state(unsigned char data) { +#ifdef DEBUG +static void jtagkey_state(unsigned char data) { fprintf(stderr,"Pins high: "); if (data & JTAGKEY_TCK) @@ -140,6 +130,7 @@ void jtagkey_state(unsigned char data) { fprintf(stderr,"\n"); } +#endif struct jtagkey_reader_arg { int num; @@ -148,7 +139,6 @@ struct jtagkey_reader_arg { static void *jtagkey_reader(void *thread_arg) { struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg; - int i; i = 0; @@ -160,6 +150,7 @@ static void *jtagkey_reader(void *thread_arg) { pthread_exit(NULL); } +/* TODO: Interpret JTAG commands and transfer in MPSSE mode */ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { int ret = 0; int i; @@ -170,7 +161,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, static unsigned char last_write = 0x00; static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf; static unsigned char readbuf[USBBUFSIZE], *readpos; - unsigned char data, prev_data; + unsigned char data, prev_data, last_cyc_write; struct jtagkey_reader_arg targ; pthread_t reader_thread; @@ -185,15 +176,12 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int len; DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num); + jtagkey_latency(BULK_LATENCY); -#ifndef SLOW_AND_SAFE - jtagkey_set_bbmode(BITMODE_BITBANG); -#endif -#ifdef SLOW_AND_SAFE targ.num = writepos-pos; targ.buf = readbuf; pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); -#endif + while (pos < writepos) { len = writepos-pos; @@ -204,13 +192,13 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, ftdi_write_data(&ftdic, pos, len); pos += len; } -#ifdef SLOW_AND_SAFE pthread_join(reader_thread, NULL); -#endif writepos = writebuf; } + last_cyc_write = last_write; + for (i = 0; i < num; i++) { DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, @@ -222,6 +210,9 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, #ifdef DEBUG if (tr[i].cmdTrans == 13) DPRINTF("write byte: %d\n", val); + + if (tr[i].cmdTrans == 13) + jtagmon(val & PP_TCK, val & PP_TMS, val & PP_TDI); #endif /* Pad writebuf for read-commands in stream */ @@ -282,7 +273,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, } } - if (nread || (*writepos != prev_data) || (i == num-1)) + if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1)) writepos++; } @@ -293,9 +284,8 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, *writepos = last_data; writepos++; -#ifndef SLOW_AND_SAFE - jtagkey_set_bbmode(BITMODE_SYNCBB); -#endif + jtagkey_latency(OTHER_LATENCY); + targ.num = writepos-writebuf; targ.buf = readbuf; pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); @@ -303,10 +293,8 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, pthread_join(reader_thread, NULL); #ifdef DEBUG - DPRINTF("write: "); - hexdump(writebuf, writepos-writebuf); - DPRINTF("read: "); - hexdump(readbuf, i); + hexdump(writebuf, writepos-writebuf, "->"); + hexdump(readbuf, i, "<-"); #endif writepos = writebuf; @@ -315,6 +303,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, } readpos = readbuf; + last_write = last_cyc_write; for (i = 0; i < num; i++) { DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", @@ -323,6 +312,10 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, port = (unsigned long)tr[i].dwPort; val = tr[i].Data.Byte; + + if ((tr[i].cmdTrans != PP_READ) && (val == last_write) && (i != num-1)) + continue; + readpos++; if (port == ppbase + PP_DATA) { @@ -344,7 +337,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, if ((data & JTAGKEY_TDO) && (last_write & PP_PROG)) val |= PP_TDO; - if (!(last_write & PP_PROG)) + if (~last_write & PP_PROG) val |= 0x08; if (last_write & 0x40)