+#include <stdio.h>
+#include <ftdi.h>
+#include "usb-driver.h"
+#include "jtagkey.h"
+
+static struct ftdi_context ftdic;
+
+int jtagkey_init(unsigned short vid, unsigned short pid) {
+ int ret = 0;
+
+ if ((ret = ftdi_init(&ftdic)) != 0) {
+ fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ return ret;
+ }
+
+ if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) {
+ fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ return ret;
+ }
+
+ if ((ret = ftdi_usb_reset(&ftdic)) != 0) {
+ fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ return ret;
+ }
+
+ if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) {
+ fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ return ret;
+ }
+
+ if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1)) != 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));
+ return ret;
+ }
+
+ if ((ret = ftdi_set_baudrate(&ftdic, 230400)) != 0) {
+ fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic));
+ return ret;
+ }
+
+ if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, 1)) != 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;
+ }
+
+ return ret;
+}
+
+void jtagkey_close() {
+ ftdi_disable_bitbang(&ftdic);
+ ftdi_usb_close(&ftdic);
+ ftdi_deinit(&ftdic);
+}
+
+void jtagkey_state(unsigned char data) {
+ fprintf(stderr,"Pins high: ");
+
+ if (data & JTAGKEY_TCK)
+ fprintf(stderr,"TCK ");
+
+ if (data & JTAGKEY_TDI)
+ fprintf(stderr,"TDI ");
+
+ if (data & JTAGKEY_TDO)
+ fprintf(stderr,"TDO ");
+
+ if (data & JTAGKEY_TMS)
+ fprintf(stderr,"TMS ");
+
+ if (data & JTAGKEY_VREF)
+ fprintf(stderr,"VREF ");
+
+ fprintf(stderr,"\n");
+}
+
+int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) {
+ int ret = 0;
+ int i;
+ unsigned long port;
+ unsigned char val;
+ static unsigned char last_write = 0;
+ unsigned char data;
+
+ 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,
+ tr[i].fAutoinc, tr[i].dwOptions);
+
+ port = (unsigned long)tr[i].dwPort;
+ val = tr[i].Data.Byte;
+
+#ifdef DEBUG
+ if (tr[i].cmdTrans == 13)
+ DPRINTF("write byte: %d\n", val);
+#endif
+
+ if (port == ppbase + PP_DATA) {
+ DPRINTF("data port\n");
+
+ data = 0x00;
+ switch(tr[i].cmdTrans) {
+ case PP_READ:
+ ret = 0; /* We don't support reading of the data port */
+ break;
+
+ case PP_WRITE:
+ if (val & PP_TDI) {
+ data |= JTAGKEY_TDI;
+ DPRINTF("TDI\n");
+ } else {
+ DPRINTF("!TDI\n");
+ }
+ if (val & PP_TCK) {
+ data |= JTAGKEY_TCK;
+ DPRINTF("TCK\n");
+ } else {
+ DPRINTF("!TCK\n");
+ }
+ if (val & PP_TMS) {
+ data |= JTAGKEY_TMS;
+ DPRINTF("TMS\n");
+ } else {
+ DPRINTF("!TMS\n");
+ }
+ if (val & PP_CTRL) {
+ data |= JTAGKEY_OEn;
+ DPRINTF("CTRL\n");
+ } else {
+ DPRINTF("!CTRL\n");
+ }
+ ftdi_write_data(&ftdic, &data, 1);
+
+#if 0
+ do {
+ ftdi_read_pins(&ftdic, &tmp);
+ } while ((tmp & (JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_TCK|JTAGKEY_TDI)) != data);
+#endif
+
+ last_write = val;
+ break;
+
+ default:
+ fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
+ ret = -1;
+ break;
+ }
+ } else if (port == ppbase + PP_STATUS) {
+ DPRINTF("status port (last write: %d)\n", last_write);
+ switch(tr[i].cmdTrans) {
+ case PP_READ:
+ ftdi_read_pins(&ftdic, &data);
+#ifdef DEBUG
+ DPRINTF("READ: 0x%x\n", data);
+ jtagkey_state(data);
+#endif
+
+ val = 0x00;
+ if (data & JTAGKEY_TDO)
+ val |= PP_TDO;
+
+ if (last_write & 0x40)
+ val |= 0x20;
+ else
+ val |= 0x80;
+ break;
+
+ case PP_WRITE:
+ ret = 0; /* Status Port is readonly */
+ break;
+
+ default:
+ fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans);
+ ret = -1;
+ break;
+ }
+ } else if (port == ppbase + PP_CONTROL) {
+ DPRINTF("control port\n");
+ } else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) {
+ DPRINTF("ECP_CFGA port\n");
+ } else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) {
+ DPRINTF("ECP_CFGB port\n");
+ } else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) {
+ DPRINTF("ECP_ECR port\n");
+ } else {
+ DPRINTF("access to unsupported address range!\n");
+ ret = 0;
+ }
+
+ tr[i].Data.Byte = val;
+
+ DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n",
+ (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes,
+ tr[i].fAutoinc, tr[i].dwOptions);
+#ifdef DEBUG
+ if (tr[i].cmdTrans == 10)
+ DPRINTF("read byte: %d\n", tr[i].Data.Byte);
+#endif
+ }
+
+ return ret;
+}
projects / usb-driver / commitdiff