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374 lines
8.5 KiB
374 lines
8.5 KiB
#include <stdio.h>
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#include <ftdi.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <inttypes.h>
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#include "usb-driver.h"
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#include "config.h"
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#include "jtagkey.h"
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#include "jtagmon.h"
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#define USBBUFSIZE 1048576
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#define JTAG_SPEED 100000
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#define BULK_LATENCY 2
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#define OTHER_LATENCY 1
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static struct ftdi_context ftdic;
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static int jtagkey_latency(int latency) {
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static int current = 0;
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int ret;
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if (current != latency) {
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DPRINTF("switching latency\n");
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if ((ret = ftdi_set_latency_timer(&ftdic, latency)) != 0) {
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fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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current = latency;
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}
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return ret;
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}
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static int jtagkey_init(unsigned short vid, unsigned short pid) {
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int ret = 0;
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unsigned char c;
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if ((ret = ftdi_init(&ftdic)) != 0) {
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fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
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fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
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fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
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fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_write_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) {
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fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_read_data_set_chunksize(&ftdic, USBBUFSIZE)) != 0) {
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fprintf(stderr, "unable to set read chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = jtagkey_latency(OTHER_LATENCY)) != 0)
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return ret;
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c = 0x00;
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ftdi_write_data(&ftdic, &c, 1);
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if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, BITMODE_SYNCBB)) != 0) {
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fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_set_baudrate(&ftdic, JTAG_SPEED)) != 0) {
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fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) {
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fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
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return ret;
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}
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return ret;
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}
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int jtagkey_open(int num) {
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int ret;
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ret = jtagkey_init(config_usb_vid(num), config_usb_pid(num));
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if (ret >= 0)
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ret = 0xff;
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return ret;
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}
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void jtagkey_close(int handle) {
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if (handle == 0xff) {
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ftdi_disable_bitbang(&ftdic);
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ftdi_usb_close(&ftdic);
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ftdi_deinit(&ftdic);
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}
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}
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#ifdef DEBUG
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static void jtagkey_state(unsigned char data) {
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fprintf(stderr,"Pins high: ");
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if (data & JTAGKEY_TCK)
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fprintf(stderr,"TCK ");
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if (data & JTAGKEY_TDI)
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fprintf(stderr,"TDI ");
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if (data & JTAGKEY_TDO)
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fprintf(stderr,"TDO ");
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if (data & JTAGKEY_TMS)
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fprintf(stderr,"TMS ");
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if (data & JTAGKEY_VREF)
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fprintf(stderr,"VREF ");
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fprintf(stderr,"\n");
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}
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#endif
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struct jtagkey_reader_arg {
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int num;
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unsigned char *buf;
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};
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static void *jtagkey_reader(void *thread_arg) {
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struct jtagkey_reader_arg *arg = (struct jtagkey_reader_arg*)thread_arg;
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int i;
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i = 0;
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DPRINTF("reader for %d bytes\n", arg->num);
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while (i < arg->num) {
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i += ftdi_read_data(&ftdic, arg->buf + i, arg->num - i);
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}
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pthread_exit(NULL);
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}
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/* TODO: Interpret JTAG commands and transfer in MPSSE mode */
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int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
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int ret = 0;
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int i;
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int nread = 0;
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unsigned long port;
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unsigned char val;
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static unsigned char last_data = 0;
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static unsigned char last_write = 0x00;
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static unsigned char writebuf[USBBUFSIZE], *writepos = writebuf;
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static unsigned char readbuf[USBBUFSIZE], *readpos;
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unsigned char data, prev_data, last_cyc_write;
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struct jtagkey_reader_arg targ;
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pthread_t reader_thread;
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/* Count reads */
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for (i = 0; i < num; i++)
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if (tr[i].cmdTrans == PP_READ)
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nread++;
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/* Write combining */
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if ((writepos-writebuf > sizeof(writebuf)-num) || (nread && writepos-writebuf)) {
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unsigned char *pos = writebuf;
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int len;
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DPRINTF("writing %d bytes due to %d following reads in %d chunks or full buffer\n", writepos-writebuf, nread, num);
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jtagkey_latency(BULK_LATENCY);
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targ.num = writepos-pos;
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targ.buf = readbuf;
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pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
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while (pos < writepos) {
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len = writepos-pos;
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if (len > USBBUFSIZE)
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len = USBBUFSIZE;
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DPRINTF("combined write of %d/%d\n",len,writepos-pos);
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ftdi_write_data(&ftdic, pos, len);
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pos += len;
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}
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pthread_join(reader_thread, NULL);
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writepos = writebuf;
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}
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last_cyc_write = last_write;
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for (i = 0; i < num; i++) {
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DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
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(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
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tr[i].fAutoinc, tr[i].dwOptions);
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port = (unsigned long)tr[i].dwPort;
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val = tr[i].Data.Byte;
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#ifdef DEBUG
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if (tr[i].cmdTrans == 13)
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DPRINTF("write byte: %d\n", val);
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if (tr[i].cmdTrans == 13)
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jtagmon(val & PP_TCK, val & PP_TMS, val & PP_TDI);
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#endif
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/* Pad writebuf for read-commands in stream */
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*writepos = last_data;
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prev_data = last_data;
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if (port == ppbase + PP_DATA) {
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DPRINTF("data port\n");
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data = 0x00;
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switch(tr[i].cmdTrans) {
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case PP_READ:
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ret = 0; /* We don't support reading of the data port */
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break;
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case PP_WRITE:
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if (val & PP_TDI) {
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data |= JTAGKEY_TDI;
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DPRINTF("TDI\n");
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} else {
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DPRINTF("!TDI\n");
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}
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if (val & PP_TCK) {
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data |= JTAGKEY_TCK;
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DPRINTF("TCK\n");
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} else {
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DPRINTF("!TCK\n");
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}
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if (val & PP_TMS) {
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data |= JTAGKEY_TMS;
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DPRINTF("TMS\n");
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} else {
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DPRINTF("!TMS\n");
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}
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if (val & PP_CTRL) {
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data = JTAGKEY_OEn;
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DPRINTF("CTRL\n");
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} else {
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DPRINTF("!CTRL\n");
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}
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if (val & PP_PROG) {
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DPRINTF("PROG\n");
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} else {
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DPRINTF("!PROG\n");
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}
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*writepos = data;
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last_data = data;
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last_write = val;
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break;
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default:
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fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
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ret = -1;
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break;
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}
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}
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if ((tr[i].cmdTrans == PP_READ) || (*writepos != prev_data) || (i == num-1))
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writepos++;
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}
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if (nread)
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{
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DPRINTF("writing %d bytes\n", writepos-writebuf);
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*writepos = last_data;
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writepos++;
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jtagkey_latency(OTHER_LATENCY);
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targ.num = writepos-writebuf;
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targ.buf = readbuf;
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pthread_create(&reader_thread, NULL, &jtagkey_reader, &targ);
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ftdi_write_data(&ftdic, writebuf, writepos-writebuf);
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pthread_join(reader_thread, NULL);
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#ifdef DEBUG
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hexdump(writebuf, writepos-writebuf, "->");
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hexdump(readbuf, i, "<-");
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#endif
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writepos = writebuf;
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} else {
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return ret;
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}
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readpos = readbuf;
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last_write = last_cyc_write;
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for (i = 0; i < num; i++) {
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DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
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(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
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tr[i].fAutoinc, tr[i].dwOptions);
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port = (unsigned long)tr[i].dwPort;
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val = tr[i].Data.Byte;
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if ((tr[i].cmdTrans != PP_READ) && (val == last_write) && (i != num-1))
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continue;
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readpos++;
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if (port == ppbase + PP_DATA) {
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if (tr[i].cmdTrans == PP_WRITE) {
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last_write = val;
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}
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} else if (port == ppbase + PP_STATUS) {
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DPRINTF("status port (last write: 0x%x)\n", last_write);
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switch(tr[i].cmdTrans) {
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case PP_READ:
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data = *readpos;
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#ifdef DEBUG
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DPRINTF("READ: 0x%x\n", data);
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jtagkey_state(data);
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#endif
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val = 0x00;
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if ((data & JTAGKEY_TDO) && (last_write & PP_PROG))
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val |= PP_TDO;
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if (~last_write & PP_PROG)
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val |= 0x08;
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if (last_write & 0x40)
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val |= 0x20;
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else
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val |= 0x80;
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break;
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case PP_WRITE:
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ret = 0; /* Status Port is readonly */
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break;
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default:
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fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
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ret = -1;
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break;
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}
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} else {
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ret = 0;
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}
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tr[i].Data.Byte = val;
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DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
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(unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
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tr[i].fAutoinc, tr[i].dwOptions);
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#ifdef DEBUG
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if (tr[i].cmdTrans == 10)
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DPRINTF("read byte: %d\n", tr[i].Data.Byte);
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#endif
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}
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return ret;
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}
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