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rework init sequence [ 1904970 ]

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git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1109 b68d4a1b-bc3d-0410-92ed-d4ac073336b7
master
Arnim Läuger 17 years ago
parent 571f7261ae
commit 785c3f17e4
3 changed files with 88 additions and 15 deletions
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7
jtag/ChangeLog
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@ -1,3 +1,10 @@
2008-03-01 Arnim <arnim@>
* src/tap/parport/ftdi.c (ftdi_mpsse_open): rework sequence to fix
a system that shows similar hangs as reported in
[ 1904970 ] JTAG operations hang with libftdi
* src/tap/parport/ftd2xx.c (ftd2xx_mpsse_open): align with ftdi.c
2008-03-01 Kolja Waschk <kawk>
* src/tap/cable/xpc.c: Implemented much faster access method using GPIF

13
jtag/src/tap/parport/ftd2xx.c
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@ -289,12 +289,17 @@ ftd2xx_mpsse_open( parport_t *parport )
FT_Close(fc);
return -1;
}
if ((status = FT_Purge(fc, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK) {
if ((status = FT_Purge(fc, FT_PURGE_RX)) != FT_OK) {
fprintf(stderr, "Can't purge buffers: %li\n", status);
FT_Close(fc);
return -1;
}
/* set a reasonnable latency timer value
if ((status = FT_SetChars(fc, 7, 1, 6, 1)) != FT_OK) {
fprintf(stderr, "Can't set special characters: %li\n", status);
FT_Close(fc);
return -1;
}
/* set a reasonable latency timer value
if this value is too low then the chip will send intermediate result data
in short packets (suboptimal performance) */
if ((status = FT_SetLatencyTimer(fc, 16)) != FT_OK) {
@ -317,7 +322,7 @@ ftd2xx_mpsse_open( parport_t *parport )
FT_Close(fc);
return -1;
}
if ((status = FT_Purge(fc, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK) {
if ((status = FT_Purge(fc, FT_PURGE_RX)) != FT_OK) {
fprintf(stderr, "Can't purge buffers: %li\n", status);
FT_Close(fc);
return -1;
@ -337,7 +342,7 @@ ftd2xx_mpsse_open( parport_t *parport )
FT_Close(fc);
return -1;
}
if ((status = FT_Purge(fc, FT_PURGE_RX | FT_PURGE_TX)) != FT_OK) {
if ((status = FT_Purge(fc, FT_PURGE_RX)) != FT_OK) {
fprintf(stderr, "Can't purge buffers: %li\n", status);
FT_Close(fc);
return -1;

83
jtag/src/tap/parport/ftdi.c
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@ -293,6 +293,57 @@ ftdi_std_open( parport_t *parport )
}
#undef LIBFTDI_UNIMPLEMENTED
static int
seq_purge( struct ftdi_context *fc, int purge_rx, int purge_tx )
{
int result = 0;
unsigned char buf;
#ifndef LIBFTDI_UNIMPLEMENTED
result = ftdi_usb_purge_buffers( fc );
if (result == 0)
result = ftdi_read_data( fc, &buf, 1 );
#else /* not yet available */
{
int rx_loop;
if (purge_rx)
for (rx_loop = 0; (rx_loop < 6) && (result == 0); rx_loop++)
result = ftdi_usb_purge_rx_buffer( fc );
if (purge_tx)
if (result == 0)
result = ftdi_usb_purge_tx_buffer( fc );
if (result == 0)
ftdi_read_data( fc, &buf, 1 );
}
#endif
return result;
}
static int
seq_reset( struct ftdi_context *fc )
{
int result = 0;
#ifdef LIBFTDI_UNIMPLEMENTED /* not yet available */
{
unsigned short status;
if ((result = ftdi_poll_status( fc, &status )) < 0)
return result;
}
#endif
if ((result = ftdi_usb_reset( fc)) < 0)
return result;
return seq_purge( fc, 1, 1 );
}
static int
ftdi_mpsse_open( parport_t *parport )
{
@ -308,7 +359,7 @@ ftdi_mpsse_open( parport_t *parport )
However, it's built after the description of JTAG_InitDevice
Ref. FTCJTAGPG10.pdf
Intermittent problems will occur when certain steps are skipped. */
if (ftdi_usb_reset(fc) < 0)
if (seq_reset(fc) < 0)
{
fprintf (stderr, "Can't reset USB: %s\n",
ftdi_get_error_string (fc));
@ -316,17 +367,27 @@ ftdi_mpsse_open( parport_t *parport )
ftdi_deinit(fc);
return -1;
}
if (ftdi_usb_purge_buffers(fc) < 0)
if (seq_purge(fc, 1, 0) < 0)
{
fprintf (stderr, "Can't purge USB buffers: %s\n",
fprintf (stderr, "Can't purge USB RX buffer: %s\n",
ftdi_get_error_string (fc));
ftdi_usb_close(fc);
ftdi_deinit(fc);
return -1;
}
/* set a reasonnable latency timer value
if this value is too low then the chip will send intermediate result data
in short packets (suboptimal performance) */
#ifdef LIBFTDI_UNIMPLEMENTED /* not yet available */
if (ftdi_set_chars(fc, 0, 0, 0, 0) < 0)
{
fprintf (stderr, "Can't set special characters: %s\n",
ftdi_get_error_string (fc));
ftdi_usb_close(fc);
ftdi_deinit(fc);
return -1;
}
#endif
/* set a reasonable latency timer value
if this value is too low then the chip will send intermediate result data
in short packets (suboptimal performance) */
if(ftdi_set_latency_timer(fc, 16) < 0)
{
fprintf (stderr, "Can't set target latency: %s\n",
@ -336,7 +397,7 @@ ftdi_mpsse_open( parport_t *parport )
return -1;
}
if (ftdi_set_bitmode(fc, 0x0b, BITMODE_RESET) < 0)
if (ftdi_disable_bitbang(fc) < 0)
{
fprintf (stderr, "Can't reset bitmode: %s\n",
ftdi_get_error_string (fc));
@ -361,9 +422,9 @@ ftdi_mpsse_open( parport_t *parport )
ftdi_deinit(fc);
return -1;
}
if (ftdi_usb_purge_buffers(fc) < 0)
if (seq_purge(fc, 1, 0) < 0)
{
fprintf (stderr, "Can't purge USB buffers: %s\n",
fprintf (stderr, "Can't purge USB RX buffer: %s\n",
ftdi_get_error_string (fc));
ftdi_usb_close(fc);
ftdi_deinit(fc);
@ -387,9 +448,9 @@ ftdi_mpsse_open( parport_t *parport )
ftdi_deinit(fc);
return -1;
}
if (ftdi_usb_purge_buffers(fc) < 0)
if (seq_purge(fc, 1, 0) < 0)
{
fprintf (stderr, "Can't purge USB buffers: %s\n",
fprintf (stderr, "Can't purge USB RX buffer: %s\n",
ftdi_get_error_string (fc));
ftdi_usb_close(fc);
ftdi_deinit(fc);

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