jackcartersmith/xilinx-usb-driver
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fix prom readback, but this slows everything down again...

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This commit is contained in:
michael 2007-04-30 21:12:26 +00:00
parent 5e3d963bcb
commit 75417531f3
1 changed files with 15 additions and 2 deletions
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17
jtagkey.c
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@ -6,6 +6,7 @@
#include "jtagkey.h" #include "jtagkey.h"
#define USBBUFSIZE 4096 #define USBBUFSIZE 4096
#define SLOW_AND_SAFE 1
static struct ftdi_context ftdic; static struct ftdi_context ftdic;
static unsigned int usb_maxlen = 0; static unsigned int usb_maxlen = 0;
@ -36,10 +37,14 @@ static int jtagkey_init(unsigned short vid, unsigned short pid) {
} }
#ifdef SLOW_AND_SAFE
usb_maxlen = 384;
#else
if ((ret = ftdi_write_data_get_chunksize(&ftdic, &usb_maxlen)) != 0) { if ((ret = ftdi_write_data_get_chunksize(&ftdic, &usb_maxlen)) != 0) {
fprintf(stderr, "unable to get write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); fprintf(stderr, "unable to get write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
return ret; return ret;
} }
#endif
if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { 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)); fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
@ -54,12 +59,12 @@ static int jtagkey_init(unsigned short vid, unsigned short pid) {
c = 0x00; c = 0x00;
ftdi_write_data(&ftdic, &c, 1); ftdi_write_data(&ftdic, &c, 1);
if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_BITBANG)) != 0) { if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) {
fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
return ret; return ret;
} }
bitbang_mode = BITMODE_BITBANG; bitbang_mode = BITMODE_SYNCBB;
if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
@ -157,7 +162,9 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
int len; int len;
DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num); DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
#ifndef SLOW_AND_SAFE
jtagkey_set_bbmode(BITMODE_BITBANG); jtagkey_set_bbmode(BITMODE_BITBANG);
#endif
while (pos < writepos) { while (pos < writepos) {
len = writepos-pos; len = writepos-pos;
@ -166,6 +173,12 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase,
DPRINTF("combined write of %d/%d\n",len,writepos-pos); DPRINTF("combined write of %d/%d\n",len,writepos-pos);
ftdi_write_data(&ftdic, pos, len); ftdi_write_data(&ftdic, pos, len);
#ifdef SLOW_AND_SAFE
i = 0;
while (i < len) {
i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf));
}
#endif
pos += len; pos += len;
} }