first bits for amontec jtagkey
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michael
parent
088b1e7b6a
commit
8121bc50c2
211
jtagkey.c
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211
jtagkey.c
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#include <stdio.h>
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#include <ftdi.h>
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#include "usb-driver.h"
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#include "jtagkey.h"
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static struct ftdi_context ftdic;
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int jtagkey_init(unsigned short vid, unsigned short pid) {
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int ret = 0;
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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, 1)) != 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_set_latency_timer(&ftdic, 1)) != 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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if ((ret = ftdi_set_baudrate(&ftdic, 230400)) != 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_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, 1)) != 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_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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void jtagkey_close() {
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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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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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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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unsigned long port;
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unsigned char val;
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static unsigned char last_write = 0;
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unsigned char data;
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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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#endif
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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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ftdi_write_data(&ftdic, &data, 1);
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#if 0
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do {
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ftdi_read_pins(&ftdic, &tmp);
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} while ((tmp & (JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_TCK|JTAGKEY_TDI)) != data);
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#endif
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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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} else if (port == ppbase + PP_STATUS) {
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DPRINTF("status port (last write: %d)\n", last_write);
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switch(tr[i].cmdTrans) {
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case PP_READ:
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ftdi_read_pins(&ftdic, &data);
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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)
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val |= PP_TDO;
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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 if (port == ppbase + PP_CONTROL) {
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DPRINTF("control port\n");
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} else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) {
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DPRINTF("ECP_CFGA port\n");
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} else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) {
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DPRINTF("ECP_CFGB port\n");
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} else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) {
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DPRINTF("ECP_ECR port\n");
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} else {
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DPRINTF("access to unsupported address range!\n");
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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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10
jtagkey.h
Normal file
10
jtagkey.h
Normal file
@ -0,0 +1,10 @@
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#define JTAGKEY_TCK 0x01
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#define JTAGKEY_TDI 0x02
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#define JTAGKEY_TDO 0x04
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#define JTAGKEY_TMS 0x08
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#define JTAGKEY_VREF 0x20
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#define JTAGKEY_OEn 0x10
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int jtagkey_init(unsigned short vid, unsigned short pid);
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void jtagkey_close();
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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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