X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/usb-driver/blobdiff_plain/75417531f327bd77dcbe6607f3fb373ecb6bf79d..e8f8e2d0600cb7b3f8a5b9a32f496d7e14c692b4:/jtagkey.c diff --git a/jtagkey.c b/jtagkey.c index 41f0fd6..fc9587c 100644 --- a/jtagkey.c +++ b/jtagkey.c @@ -1,16 +1,36 @@ #include #include #include +#include +#include #include "usb-driver.h" #include "config.h" #include "jtagkey.h" +#include "jtagmon.h" -#define USBBUFSIZE 4096 -#define SLOW_AND_SAFE 1 +#define USBBUFSIZE 1048576 +#define JTAG_SPEED 100000 +#define BULK_LATENCY 2 +#define OTHER_LATENCY 1 static struct ftdi_context ftdic; -static unsigned int usb_maxlen = 0; -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; @@ -36,25 +56,18 @@ static int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } - -#ifdef SLOW_AND_SAFE - usb_maxlen = 384; -#else - 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)); + if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) { + fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); return ret; } -#endif - 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 = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) { + fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); 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)); + if ((ret = jtagkey_latency(OTHER_LATENCY)) != 0) 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)); @@ -93,32 +109,8 @@ void jtagkey_close(int handle) { } } -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; -} - -void jtagkey_state(unsigned char data) { +#ifdef DEBUG +static void jtagkey_state(unsigned char data) { fprintf(stderr,"Pins high: "); if (data & JTAGKEY_TCK) @@ -138,7 +130,27 @@ void jtagkey_state(unsigned char data) { fprintf(stderr,"\n"); } +#endif + +struct jtagkey_reader_arg { + int num; + unsigned char *buf; +}; +static void *jtagkey_reader(void *thread_arg) { + struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg; + int i; + + i = 0; + DPRINTF("reader for %d bytes\n", arg->num); + while (i < arg->num) { + i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i); + } + + 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; @@ -149,7 +161,9 @@ 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; /* Count reads */ for (i = 0; i < num; i++) @@ -160,31 +174,31 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) { unsigned char *pos = writebuf; 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); + + targ.num = writepos-pos; + targ.buf = readbuf; + pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); -#ifndef SLOW_AND_SAFE - jtagkey_set_bbmode(BITMODE_BITBANG); -#endif while (pos < writepos) { len = writepos-pos; - if (len > usb_maxlen) - len = usb_maxlen; + if (len > USBBUFSIZE) + len = USBBUFSIZE; DPRINTF("combined write of %d/%d\n",len,writepos-pos); 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; } + pthread_join(reader_thread, NULL); 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, @@ -196,6 +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 */ @@ -256,7 +273,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, } } - if (nread || (*writepos != prev_data)) + if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1)) writepos++; } @@ -267,13 +284,13 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, *writepos = last_data; writepos++; - jtagkey_set_bbmode(BITMODE_SYNCBB); - ftdi_write_data(&ftdic, writebuf, writepos-writebuf); + jtagkey_latency(OTHER_LATENCY); - i = 0; - while (i < writepos-writebuf) { - i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf)); - } + targ.num = writepos-writebuf; + targ.buf = readbuf; + pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ); + ftdi_write_data(&ftdic, writebuf, writepos-writebuf); + pthread_join(reader_thread, NULL); #ifdef DEBUG DPRINTF("write: "); @@ -288,6 +305,7 @@ 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", @@ -296,6 +314,10 @@ 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) { @@ -317,7 +339,7 @@ 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)