X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/usb-driver/blobdiff_plain/397d1c368eb948ccabdd711bd20a92461bf60799..b9423a5343fe94b8db9aca1fff6fcd1de9dd7088:/jtagkey.c diff --git a/jtagkey.c b/jtagkey.c index c12e235..fc9587c 100644 --- a/jtagkey.c +++ b/jtagkey.c @@ -1,14 +1,38 @@ #include #include +#include +#include +#include #include "usb-driver.h" +#include "config.h" #include "jtagkey.h" +#include "jtagmon.h" -#define USBBUFSIZE 4096 +#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; -int jtagkey_init(unsigned short vid, unsigned short pid) { +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; unsigned char c; @@ -32,30 +56,32 @@ int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } - - 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; } - 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); - 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)); return ret; } + 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)); return ret; @@ -64,13 +90,27 @@ int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } -void jtagkey_close() { - ftdi_disable_bitbang(&ftdic); - ftdi_usb_close(&ftdic); - ftdi_deinit(&ftdic); +int jtagkey_open(int num) { + int ret; + + ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num)); + + if (ret >= 0) + ret = 0xff; + + return ret; } -void jtagkey_state(unsigned char data) { +void jtagkey_close(int handle) { + if (handle == 0xff) { + ftdi_disable_bitbang(&ftdic); + ftdi_usb_close(&ftdic); + ftdi_deinit(&ftdic); + } +} + +#ifdef DEBUG +static void jtagkey_state(unsigned char data) { fprintf(stderr,"Pins high: "); if (data & JTAGKEY_TCK) @@ -90,7 +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; @@ -101,7 +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++) @@ -112,23 +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); 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); pos += len; } + pthread_join(reader_thread, NULL); - DPRINTF("read %d/%d bytes\n", i, writepos-writebuf); 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, @@ -140,6 +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 */ @@ -200,17 +273,24 @@ 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++; } if (nread) { DPRINTF("writing %d bytes\n", writepos-writebuf); - for (i=0; i