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dbdma: Allow clearing only control bits.

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Only control bits can be set and cleared by software.
Command bits and status bits cannot be cleared.
This commit is contained in:
joevt 2024-03-20 10:26:38 -07:00 committed by dingusdev
parent d56520d22a
commit 15986a4e4f
1 changed files with 1 additions and 1 deletions
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2
devices/common/dbdma.cpp
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@ -334,7 +334,7 @@ void DMAChannel::reg_write(uint32_t offset, uint32_t value, int size) {
switch (offset) {
case DMAReg::CH_CTRL:
mask = value >> 16;
new_stat = (value & mask & 0xF0FFU) | (old_stat & ~mask);
new_stat = (value & mask & 0xF0FFU) | (old_stat & ~(mask & 0xC0FF));
LOG_F(9, "%s: New ChannelStatus value = 0x%X", this->get_name().c_str(), new_stat);
// update ch_stat.s0...s7 if requested (needed for interrupt generation)