#include <stdbool.h>
-/** Delay value for SCAN operations with less than maximum TCK frequency */
-u8 delay_scan = 0;
+/** Delay value for SCAN_IN operations with less than maximum TCK frequency */
+u8 delay_scan_in = 0;
-/** Delay value for CLOCK_TCK operations */
+/** Delay value for SCAN_OUT operations with less than maximum TCK frequency */
+u8 delay_scan_out = 0;
+
+/** Delay value for SCAN_IO operations with less than maximum TCK frequency */
+u8 delay_scan_io = 0;
+
+/** Delay value for CLOCK_TCK operations with less than maximum frequency */
u8 delay_tck = 0;
/** Delay value for CLOCK_TMS operations with less than maximum frequency */
* Dummy data is shifted into the JTAG chain via TDI, TDO data is sampled and
* stored in the EP2 IN buffer.
*
+ * Maximum achievable TCK frequency is 182 kHz for ULINK clocked at 24 MHz.
+ *
* @param out_offset offset in OUT2BUF where payload data starts
*/
void jtag_scan_in(u8 out_offset, u8 in_offset)
for (j = 0; j < 8; j++) {
OUTB = outb_buffer; /* TCK changes here */
- OUTB = (outb_buffer | PIN_TCK);
tdo_data = tdo_data >> 1;
+ OUTB = (outb_buffer | PIN_TCK);
if (GET_TDO()) {
tdo_data |= 0x80;
}
OUTB = outb_buffer; /* TCK change here */
- OUTB = (outb_buffer | PIN_TCK);
tdo_data = tdo_data >> 1;
+ OUTB = (outb_buffer | PIN_TCK);
if (GET_TDO()) {
tdo_data |= 0x80;
}
}
+/**
+ * Perform JTAG SCAN-IN operation at variable TCK frequency.
+ *
+ * Dummy data is shifted into the JTAG chain via TDI, TDO data is sampled and
+ * stored in the EP2 IN buffer.
+ *
+ * Maximum achievable TCK frequency is 113 kHz for ULINK clocked at 24 MHz.
+ *
+ * @param out_offset offset in OUT2BUF where payload data starts
+ */
+void jtag_slow_scan_in(u8 out_offset, u8 in_offset)
+{
+ u8 scan_size_bytes, bits_last_byte;
+ u8 tms_count_start, tms_count_end;
+ u8 tms_sequence_start, tms_sequence_end;
+ u8 tdo_data, i, j, k;
+
+ u8 outb_buffer;
+
+ /* Get parameters from OUT2BUF */
+ scan_size_bytes = OUT2BUF[out_offset];
+ bits_last_byte = OUT2BUF[out_offset + 1];
+ tms_count_start = (OUT2BUF[out_offset + 2] >> 4) & 0x0F;
+ tms_count_end = OUT2BUF[out_offset + 2] & 0x0F;
+ tms_sequence_start = OUT2BUF[out_offset + 3];
+ tms_sequence_end = OUT2BUF[out_offset + 4];
+
+ if (tms_count_start > 0) {
+ jtag_slow_clock_tms(tms_count_start, tms_sequence_start);
+ }
+
+ outb_buffer = OUTB & ~(PIN_TDI | PIN_TCK | PIN_TMS);
+
+ /* Shift all bytes except the last byte */
+ for (i = 0; i < scan_size_bytes - 1; i++) {
+ tdo_data = 0;
+
+ for (j = 0; j < 8; j++) {
+ OUTB = outb_buffer; /* TCK changes here */
+ for (k = 0; k < delay_scan_in; k++);
+ tdo_data = tdo_data >> 1;
+
+ OUTB = (outb_buffer | PIN_TCK);
+ for (k = 0; k < delay_scan_in; k++);
+
+ if (GET_TDO()) {
+ tdo_data |= 0x80;
+ }
+ }
+
+ /* Copy TDO data to IN2BUF */
+ IN2BUF[i + in_offset] = tdo_data;
+ }
+
+ tdo_data = 0;
+
+ /* Shift the last byte */
+ for (j = 0; j < bits_last_byte; j++) {
+ /* Assert TMS signal if requested and this is the last bit */
+ if ((j == bits_last_byte - 1) && (tms_count_end > 0)) {
+ outb_buffer |= PIN_TMS;
+ tms_count_end--;
+ tms_sequence_end = tms_sequence_end >> 1;
+ }
+
+ OUTB = outb_buffer; /* TCK change here */
+ for (k = 0; k < delay_scan_in; k++);
+ tdo_data = tdo_data >> 1;
+
+ OUTB = (outb_buffer | PIN_TCK);
+ for (k = 0; k < delay_scan_in; k++);
+
+ if (GET_TDO()) {
+ tdo_data |= 0x80;
+ }
+ }
+ tdo_data = tdo_data >> (8 - bits_last_byte);
+
+ /* Copy TDO data to IN2BUF */
+ IN2BUF[i + in_offset] = tdo_data;
+
+ /* Move to correct end state */
+ if (tms_count_end > 0) {
+ jtag_slow_clock_tms(tms_count_end, tms_sequence_end);
+ }
+}
+
/**
* Perform JTAG SCAN-OUT operation at maximum TCK frequency.
*
* data is not sampled.
* The TAP-FSM state is alyways left in the PAUSE-DR/PAUSE-IR state.
*
+ * Maximum achievable TCK frequency is 142 kHz for ULINK clocked at 24 MHz.
+ *
* @param out_offset offset in OUT2BUF where payload data starts
*/
void jtag_scan_out(u8 out_offset)
}
}
+/**
+ * Perform JTAG SCAN-OUT operation at maximum TCK frequency.
+ *
+ * Data stored in EP2 OUT buffer is shifted into the JTAG chain via TDI, TDO
+ * data is not sampled.
+ * The TAP-FSM state is alyways left in the PAUSE-DR/PAUSE-IR state.
+ *
+ * Maximum achievable TCK frequency is 97 kHz for ULINK clocked at 24 MHz.
+ *
+ * @param out_offset offset in OUT2BUF where payload data starts
+ */
+void jtag_slow_scan_out(u8 out_offset)
+{
+ u8 scan_size_bytes, bits_last_byte;
+ u8 tms_count_start, tms_count_end;
+ u8 tms_sequence_start, tms_sequence_end;
+ u8 tdi_data, i, j, k;
+
+ u8 outb_buffer;
+
+ /* Get parameters from OUT2BUF */
+ scan_size_bytes = OUT2BUF[out_offset];
+ bits_last_byte = OUT2BUF[out_offset + 1];
+ tms_count_start = (OUT2BUF[out_offset + 2] >> 4) & 0x0F;
+ tms_count_end = OUT2BUF[out_offset + 2] & 0x0F;
+ tms_sequence_start = OUT2BUF[out_offset + 3];
+ tms_sequence_end = OUT2BUF[out_offset + 4];
+
+ if (tms_count_start > 0) {
+ jtag_slow_clock_tms(tms_count_start, tms_sequence_start);
+ }
+
+ outb_buffer = OUTB & ~(PIN_TCK | PIN_TMS);
+
+ /* Shift all bytes except the last byte */
+ for (i = 0; i < scan_size_bytes - 1; i++) {
+ tdi_data = OUT2BUF[i + out_offset + 5];
+
+ for (j = 0; j < 8; j++) {
+ if (tdi_data & 0x01) {
+ outb_buffer |= PIN_TDI;
+ }
+ else {
+ outb_buffer &= ~PIN_TDI;
+ }
+
+ OUTB = outb_buffer; /* TDI and TCK change here */
+ for (k = 0; k < delay_scan_out; k++);
+ tdi_data = tdi_data >> 1;
+
+ OUTB = (outb_buffer | PIN_TCK);
+ for (k = 0; k < delay_scan_out; k++);
+ }
+ }
+
+ tdi_data = OUT2BUF[i + out_offset + 5];
+
+ /* Shift the last byte */
+ for (j = 0; j < bits_last_byte; j++) {
+ if (tdi_data & 0x01) {
+ outb_buffer |= PIN_TDI;
+ }
+ else {
+ outb_buffer &= ~PIN_TDI;
+ }
+
+ /* Assert TMS signal if requested and this is the last bit */
+ if ((j == bits_last_byte - 1) && (tms_count_end > 0)) {
+ outb_buffer |= PIN_TMS;
+ tms_count_end--;
+ tms_sequence_end = tms_sequence_end >> 1;
+ }
+
+ OUTB = outb_buffer; /* TDI and TCK change here */
+ for (k = 0; k < delay_scan_out; k++);
+ tdi_data = tdi_data >> 1;
+
+ OUTB = (outb_buffer | PIN_TCK);
+ for (k = 0; k < delay_scan_out; k++);
+ }
+
+ /* Move to correct end state */
+ if (tms_count_end > 0) {
+ jtag_slow_clock_tms(tms_count_end, tms_sequence_end);
+ }
+}
+
/**
* Perform bidirectional JTAG SCAN operation at maximum TCK frequency.
*
* data is sampled and stored in the EP2 IN buffer.
* The TAP-FSM state is alyways left in the PAUSE-DR/PAUSE-IR state.
*
+ * Maximum achievable TCK frequency is 100 kHz for ULINK clocked at 24 MHz.
+ *
* @param out_offset offset in OUT2BUF where payload data starts
*/
void jtag_scan_io(u8 out_offset, u8 in_offset)
}
}
+/**
+ * Perform bidirectional JTAG SCAN operation at maximum TCK frequency.
+ *
+ * Data stored in EP2 OUT buffer is shifted into the JTAG chain via TDI, TDO
+ * data is sampled and stored in the EP2 IN buffer.
+ * The TAP-FSM state is alyways left in the PAUSE-DR/PAUSE-IR state.
+ *
+ * Maximum achievable TCK frequency is 78 kHz for ULINK clocked at 24 MHz.
+ *
+ * @param out_offset offset in OUT2BUF where payload data starts
+ */
+void jtag_slow_scan_io(u8 out_offset, u8 in_offset)
+{
+ u8 scan_size_bytes, bits_last_byte;
+ u8 tms_count_start, tms_count_end;
+ u8 tms_sequence_start, tms_sequence_end;
+ u8 tdi_data, tdo_data, i, j, k;
+
+ u8 outb_buffer;
+
+ /* Get parameters from OUT2BUF */
+ scan_size_bytes = OUT2BUF[out_offset];
+ bits_last_byte = OUT2BUF[out_offset + 1];
+ tms_count_start = (OUT2BUF[out_offset + 2] >> 4) & 0x0F;
+ tms_count_end = OUT2BUF[out_offset + 2] & 0x0F;
+ tms_sequence_start = OUT2BUF[out_offset + 3];
+ tms_sequence_end = OUT2BUF[out_offset + 4];
+
+ if (tms_count_start > 0) {
+ jtag_slow_clock_tms(tms_count_start, tms_sequence_start);
+ }
+
+ outb_buffer = OUTB & ~(PIN_TCK | PIN_TMS);
+
+ /* Shift all bytes except the last byte */
+ for (i = 0; i < scan_size_bytes - 1; i++) {
+ tdi_data = OUT2BUF[i + out_offset + 5];
+ tdo_data = 0;
+
+ for (j = 0; j < 8; j++) {
+ if (tdi_data & 0x01) {
+ outb_buffer |= PIN_TDI;
+ }
+ else {
+ outb_buffer &= ~PIN_TDI;
+ }
+
+ OUTB = outb_buffer; /* TDI and TCK change here */
+ for (k = 0; k < delay_scan_io; k++);
+ tdi_data = tdi_data >> 1;
+
+ OUTB = (outb_buffer | PIN_TCK);
+ for (k = 0; k < delay_scan_io; k++);
+ tdo_data = tdo_data >> 1;
+
+ if (GET_TDO()) {
+ tdo_data |= 0x80;
+ }
+ }
+
+ /* Copy TDO data to IN2BUF */
+ IN2BUF[i + in_offset] = tdo_data;
+ }
+
+ tdi_data = OUT2BUF[i + out_offset + 5];
+ tdo_data = 0;
+
+ /* Shift the last byte */
+ for (j = 0; j < bits_last_byte; j++) {
+ if (tdi_data & 0x01) {
+ outb_buffer |= PIN_TDI;
+ }
+ else {
+ outb_buffer &= ~PIN_TDI;
+ }
+
+ /* Assert TMS signal if requested and this is the last bit */
+ if ((j == bits_last_byte - 1) && (tms_count_end > 0)) {
+ outb_buffer |= PIN_TMS;
+ tms_count_end--;
+ tms_sequence_end = tms_sequence_end >> 1;
+ }
+
+ OUTB = outb_buffer; /* TDI and TCK change here */
+ for (k = 0; k < delay_scan_io; k++);
+ tdi_data = tdi_data >> 1;
+
+ OUTB = (outb_buffer | PIN_TCK);
+ for (k = 0; k < delay_scan_io; k++);
+ tdo_data = tdo_data >> 1;
+
+ if (GET_TDO()) {
+ tdo_data |= 0x80;
+ }
+ }
+ tdo_data = tdo_data >> (8 - bits_last_byte);
+
+ /* Copy TDO data to IN2BUF */
+ IN2BUF[i + in_offset] = tdo_data;
+
+ /* Move to correct end state */
+ if (tms_count_end > 0) {
+ jtag_slow_clock_tms(tms_count_end, tms_sequence_end);
+ }
+}
+
/**
* Generate TCK clock cycles.
*
+ * Maximum achievable TCK frequency is 375 kHz for ULINK clocked at 24 MHz.
+ *
* @param count number of TCK clock cyclces to generate.
*/
void jtag_clock_tck(u16 count)
{
u16 i;
- u8 j;
+ u8 outb_buffer = OUTB & ~(PIN_TCK);
for ( i = 0; i < count; i++ ) {
- SET_TCK_LOW();
- for(j = 0; j < delay_tck; j++);
+ OUTB = outb_buffer;
+ OUTB = outb_buffer | PIN_TCK;
+ }
+}
+
+/**
+ * Generate TCK clock cycles at variable frequency.
+ *
+ * Maximum achieveable TCK frequency is 166.6 kHz for ULINK clocked at 24 MHz.
+ *
+ * @param count number of TCK clock cyclces to generate.
+ */
+void jtag_slow_clock_tck(u16 count)
+{
+ u16 i;
+ u8 j;
+ u8 outb_buffer = OUTB & ~(PIN_TCK);
- SET_TCK_HIGH();
- for(j = 0; j < delay_tck; j++);
+ for ( i = 0; i < count; i++ ) {
+ OUTB = outb_buffer;
+ for (j = 0; j < delay_tck; j++);
+ OUTB = outb_buffer | PIN_TCK;
+ for (j = 0; j < delay_tck; j++);
}
}
/**
- * Perform TAP-FSM state transitions at maximum TCK frequency.
+ * Perform TAP FSM state transitions at maximum TCK frequency.
+ *
+ * Maximum achievable TCK frequency is 176 kHz for ULINK clocked at 24 MHz.
*
* @param count the number of state transitions to perform.
* @param sequence the TMS pin levels for each state transition, starting with
*/
void jtag_clock_tms(u8 count, u8 sequence)
{
- volatile u8 outb_buffer;
+ u8 outb_buffer = OUTB & ~(PIN_TCK);
u8 i;
- outb_buffer = OUTB & ~(PIN_TCK);
-
for ( i = 0; i < count; i++ ) {
/* Set TMS pin according to sequence parameter */
if ( sequence & 0x1 ) {
/**
* Perform TAP-FSM state transitions at less than maximum TCK frequency.
*
+ * Maximum achievable TCK frequency is 117 kHz for ULINK clocked at 24 MHz.
+ *
* @param count the number of state transitions to perform.
* @param sequence the TMS pin levels for each state transition, starting with
* the least-significant bit.
*/
void jtag_slow_clock_tms(u8 count, u8 sequence)
{
+ u8 outb_buffer = OUTB & ~(PIN_TCK);
+ u8 i, j;
+
+ for (i = 0; i < count; i++) {
+ /* Set TMS pin according to sequence parameter */
+ if ( sequence & 0x1 ) {
+ outb_buffer |= PIN_TMS;
+ }
+ else {
+ outb_buffer &= ~PIN_TMS;
+ }
+ OUTB = outb_buffer;
+ for (j = 0; j < delay_tms; j++);
+ sequence = sequence >> 1;
+ OUTB = outb_buffer | PIN_TCK;
+ for (j = 0; j < delay_tms; j++);
+ }
}
/**
/**
* Configure TCK delay parameters.
*
- * @param scan number of delay cycles in shift operations.
+ * @param scan_in number of delay cycles in scan_in operations.
+ * @param scan_out number of delay cycles in scan_out operations.
+ * @param scan_io number of delay cycles in scan_io operations.
* @param tck number of delay cycles in clock_tck operations.
* @param tms number of delay cycles in clock_tms operations.
*/
-void jtag_configure_tck_delay(u8 scan, u8 tck, u8 tms)
+void jtag_configure_tck_delay(u8 scan_in, u8 scan_out, u8 scan_io, u8 tck,
+ u8 tms)
{
- delay_scan = scan;
+ delay_scan_in = scan_in;
+ delay_scan_out = scan_out;
+ delay_scan_io = scan_io;
delay_tck = tck;
delay_tms = tms;
}
projects / openocd / commitdiff