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Merge pull request #638 from pu-cc/gatemate-a2-jtagbypass 

src/colognechip.cpp: allow jtag-spi-bypass for A2
This commit is contained in:
Gwenhael Goavec-Merou 2026-03-25 10:22:55 +01:00 committed by GitHub
parent b84e319298 8c397bd325
commit 9eeae91ab0
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GPG Key ID: B5690EEEBB952194
1 changed files with 9 additions and 5 deletions
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14
src/colognechip.cpp
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@ -425,16 +425,18 @@ int CologneChip::spi_put(uint8_t cmd, const uint8_t *tx, uint8_t *rx, uint32_t l
jtx[i+1] = ConfigBitstreamParser::reverseByte(tx[i]);
}
_jtag->shiftIR(JTAG_SPI_BYPASS, 6, Jtag::SELECT_DR_SCAN);
_jtag->shiftIR(JTAG_SPI_BYPASS, 6, Jtag::SHIFT_DR);
int test = (rx == NULL) ? 8*xfer_len+1 : 8*xfer_len+2;
_jtag->shiftDR(jtx, (rx == NULL)? NULL: jrx, test, Jtag::SELECT_DR_SCAN);
int drlen = (rx == NULL) ? 8*xfer_len : 8*xfer_len+1;
_jtag->read_write(jtx, (rx == NULL) ? NULL : jrx, drlen, false);
int shift = _jtag->get_devices_list().size();
if (rx != NULL) {
for (uint32_t i=0; i < len; i++) {
uint8_t b0 = ConfigBitstreamParser::reverseByte(jrx[i+1]);
uint8_t b1 = ConfigBitstreamParser::reverseByte(jrx[i+2]);
rx[i] = (b0 << 1) | ((b1 >> 7) & 0x01);
rx[i] = (b0 << shift) | (b1 >> 8-shift);
}
}
return 0;
@ -482,11 +484,13 @@ int CologneChip::spi_wait(uint8_t cmd, uint8_t mask, uint8_t cond,
_jtag->shiftIR(JTAG_SPI_BYPASS, 6, Jtag::SHIFT_DR);
_jtag->read_write(&tx, NULL, 8, 0);
int shift = _jtag->get_devices_list().size();
do {
_jtag->read_write(dummy, rx, 16, 0);
uint8_t b0 = ConfigBitstreamParser::reverseByte(rx[0]);
uint8_t b1 = ConfigBitstreamParser::reverseByte(rx[1]);
tmp = (b0 << 1) | ((b1 >> 7) & 0x01);
tmp = (b0 << shift) | (b1 >> 8-shift);
count++;
if (count == timeout) {