X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/usb-driver/blobdiff_plain/d0e2002d3acb644380d6250cc73927ce1d698f76..25ba7a49098fb2f4c120293d8f7c7404e5d3687b:/jtagkey.c diff --git a/jtagkey.c b/jtagkey.c index 4266959..e17afc8 100644 --- a/jtagkey.c +++ b/jtagkey.c @@ -1,13 +1,18 @@ #include #include +#include +#include #include "usb-driver.h" +#include "config.h" #include "jtagkey.h" -#define USBBUFSIZE 384 +#define USBBUFSIZE 1048576 +#define SLOW_AND_SAFE 1 static struct ftdi_context ftdic; +static unsigned char bitbang_mode; -int jtagkey_init(unsigned short vid, unsigned short pid) { +static int jtagkey_init(unsigned short vid, unsigned short pid) { int ret = 0; unsigned char c; @@ -31,12 +36,15 @@ int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } -#if 0 - if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1)) != 0) { + 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_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_latency_timer(&ftdic, 1)) != 0) { fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); @@ -56,6 +64,8 @@ int jtagkey_init(unsigned short vid, unsigned short pid) { return ret; } + bitbang_mode = BITMODE_SYNCBB; + 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; @@ -64,12 +74,52 @@ 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_close(int handle) { + if (handle == 0xff) { + ftdi_disable_bitbang(&ftdic); + ftdi_usb_close(&ftdic); + ftdi_deinit(&ftdic); + } } +#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) { fprintf(stderr,"Pins high: "); @@ -91,6 +141,25 @@ void jtagkey_state(unsigned char data) { fprintf(stderr,"\n"); } +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); +} + int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { int ret = 0; int i; @@ -98,27 +167,47 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, unsigned long port; unsigned char val; static unsigned char last_data = 0; + static unsigned char last_write = 0x00; static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf; static unsigned char readbuf[USBBUFSIZE], *readpos; - unsigned char data; - static unsigned char last_write = 0x00; + unsigned char data, prev_data; + struct jtagkey_reader_arg targ; + pthread_t reader_thread; - /* Count writes */ + /* Count reads */ for (i = 0; i < num; i++) - if (tr[i].cmdTrans == 10) + if (tr[i].cmdTrans == PP_READ) nread++; /* Write combining */ 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); - ftdi_write_data(&ftdic, writebuf, writepos-writebuf); +#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; + + if (len > USBBUFSIZE) + len = USBBUFSIZE; + + DPRINTF("combined write of %d/%d\n",len,writepos-pos); + ftdi_write_data(&ftdic, pos, len); + pos += len; + } +#ifdef SLOW_AND_SAFE + pthread_join(reader_thread, NULL); +#endif - i = 0; - while (i < writepos-writebuf) { - i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf)); - }; - DPRINTF("read %d/%d bytes\n", i, writepos-writebuf); writepos = writebuf; } @@ -137,6 +226,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, /* Pad writebuf for read-commands in stream */ *writepos = last_data; + prev_data = last_data; if (port == ppbase + PP_DATA) { DPRINTF("data port\n"); @@ -191,20 +281,26 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, break; } } - writepos++; + + if (nread || (*writepos != prev_data) || (i == num-1)) + writepos++; } if (nread) { DPRINTF("writing %d bytes\n", writepos-writebuf); - ftdi_write_data(&ftdic, writebuf, writepos-writebuf); - DPRINTF("reading %d bytes\n", writepos-writebuf); - i = 0; - while (i < writepos-writebuf) { - i += ftdi_read_data(&ftdic, readbuf, sizeof(readbuf)); - } - DPRINTF("read %d bytes\n", i); + *writepos = last_data; + writepos++; + +#ifndef SLOW_AND_SAFE + jtagkey_set_bbmode(BITMODE_SYNCBB); +#endif + 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: "); @@ -219,7 +315,6 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, } readpos = readbuf; - readpos += 0; for (i = 0; i < num; i++) { DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", @@ -239,6 +334,7 @@ int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, switch(tr[i].cmdTrans) { case PP_READ: data = *readpos; + #ifdef DEBUG DPRINTF("READ: 0x%x\n", data); jtagkey_state(data);