sravan/system76-embedded-controller
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Pulse SCI

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This commit is contained in:
Jeremy Soller 2020-01-28 16:15:16 -07:00
parent 75f9ca4692
commit d2e02f2380
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GPG Key ID: E988B49EE78A7FB1
1 changed files with 27 additions and 12 deletions
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39
src/board/system76/galp3-c/pmc.c
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@ -1,3 +1,4 @@
#include <arch/delay.h>
#include <board/acpi.h>
#include <board/gpio.h>
#include <board/pmc.h>
@ -20,17 +21,34 @@ enum PmcState {
static uint8_t pmc_sci_queue = 0;
bool pmc_sci(struct Pmc * pmc, uint8_t sci) {
bool update = pmc_sci_queue == 0;
// Set SCI queue if possible
if (update) pmc_sci_queue = sci;
// Set SCI pending bit
uint8_t sts = pmc_status(pmc);
pmc_set_status(pmc, sts | (1 << 5));
void pmc_sci_interrupt(void) {
// Start SCI interrupt
gpio_set(&SCI_N, false);
*(SCI_N.control) = 0x40;
return update;
*(SCI_N.control) = GPIO_OUT;
// Delay T_HOLD (value assumed)
delay_us(1);
// Stop SCI interrupt
*(SCI_N.control) = GPIO_IN;
gpio_set(&SCI_N, true);
}
bool pmc_sci(struct Pmc * pmc, uint8_t sci) {
// Set SCI queue if possible
if (pmc_sci_queue == 0) {
pmc_sci_queue = sci;
// Set SCI pending bit
pmc_set_status(pmc, pmc_status(pmc) | (1 << 5));
// Send SCI
pmc_sci_interrupt();
return true;
} else {
return false;
}
}
void pmc_event(struct Pmc * pmc) {
@ -75,9 +93,6 @@ void pmc_event(struct Pmc * pmc) {
pmc_set_status(pmc, sts & ~(1 << 5));
// Send SCI queue
pmc_write(pmc, pmc_sci_queue, PMC_TIMEOUT);
// Stop SCI interrupt
*(SCI_N.control) = 0x80;
gpio_set(&SCI_N, true);
// Clear SCI queue
pmc_sci_queue = 0;
break;