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kbc: Enable Transaction Done interrupt

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Step 2 for data transmission (both RX and TX) is to enable the
Transaction Done interrupt.

Ref: IT5570 V0.3.2, 7.9.3.1 Hardware Mode Selected
Signed-off-by: Tim Crawford <tcrawford@system76.com>
This commit is contained in:
Tim Crawford
2023-01-10 12:08:37 -07:00
committed by Jeremy Soller
parent 22487f737d
commit 373dc36676
1 changed files with 5 additions and 0 deletions
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5
src/board/system76/common/kbc.c
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@ -396,6 +396,9 @@ static void kbc_on_input_data(struct Kbc *kbc, uint8_t data) {
state = KBC_STATE_NORMAL;
// Begin write
*(PS2_TOUCHPAD.control) = 0x0D;
// Enable Transaction Done interrupt
*(PS2_TOUCHPAD.interrupt) |= BIT(2);
// Write the data
*(PS2_TOUCHPAD.data) = data;
// Pull data line low
*(PS2_TOUCHPAD.control) = 0x0C;
@ -481,6 +484,8 @@ void kbc_event(struct Kbc *kbc) {
if (kbc_second_wait == 0) {
// Attempt to read from touchpad
*(PS2_TOUCHPAD.control) = 0x07;
// Enable Transaction Done interrupt
*(PS2_TOUCHPAD.interrupt) |= BIT(2);
if (state == KBC_STATE_NORMAL) {
uint8_t sts = *(PS2_TOUCHPAD.status);
*(PS2_TOUCHPAD.status) = sts;