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Fix powman powman_configure_wakeup_state and powman_get_power_state #2516

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Fix powman powman_configure_wakeup_state and powman_get_power_state #2516

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0bfd995
fix powman_get_power_state (#2506)
eightycc Jun 11, 2025
a380068
fix powman_configure_wakeup_state (#2511)
eightycc Jun 11, 2025
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31 changes: 21 additions & 10 deletions src/rp2_common/hardware_powman/powman.c
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Original file line number Diff line number Diff line change
Expand Up @@ -125,7 +125,7 @@ void powman_timer_disable_gpio_1hz_sync(void) {
}

powman_power_state powman_get_power_state(void) {
uint32_t state_reg = powman_hw->state & POWMAN_STATE_CURRENT_BITS;
uint32_t state_reg = ~powman_hw->state & POWMAN_STATE_CURRENT_BITS;
// todo we should have hardware/regs/powman.h values for these
static_assert(POWMAN_POWER_DOMAIN_SRAM_BANK1 == 0, "");
static_assert(POWMAN_POWER_DOMAIN_SRAM_BANK0 == 1, "");
Expand Down Expand Up @@ -181,19 +181,30 @@ int powman_set_power_state(powman_power_state state) {
}

bool powman_configure_wakeup_state(powman_power_state sleep_state, powman_power_state wakeup_state) {
// When powman wakes up it can keep the state of the sram0 and sram1 banks. Note, it can't
// explicitly
bool valid = powman_power_state_is_domain_on(wakeup_state, POWMAN_POWER_DOMAIN_XIP_CACHE);
// Must be entering a P1 low-power state (SWCORE OFF).
bool valid = !powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SWITCHED_CORE);
// Must be waking up in a P0 state (SWCORE ON).
valid &= powman_power_state_is_domain_on(wakeup_state, POWMAN_POWER_DOMAIN_SWITCHED_CORE);
valid &= powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SRAM_BANK0) ==
powman_power_state_is_domain_on(wakeup_state, POWMAN_POWER_DOMAIN_SRAM_BANK0);
valid &= powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SRAM_BANK1) ==
powman_power_state_is_domain_on(wakeup_state, POWMAN_POWER_DOMAIN_SRAM_BANK1);
powman_power_state current_state = powman_get_power_state();
bool current_sram0 = powman_power_state_is_domain_on(current_state, POWMAN_POWER_DOMAIN_SRAM_BANK0);
bool current_sram1 = powman_power_state_is_domain_on(current_state, POWMAN_POWER_DOMAIN_SRAM_BANK1);
bool sleep_sram0 = powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SRAM_BANK0);
bool sleep_sram1 = powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SRAM_BANK1);
bool wakeup_sram0 = powman_power_state_is_domain_on(wakeup_state, POWMAN_POWER_DOMAIN_SRAM_BANK0);
bool wakeup_sram1 = powman_power_state_is_domain_on(wakeup_state, POWMAN_POWER_DOMAIN_SRAM_BANK1);
// Sleep state cannot turn ON SRAM0 or SRAM1 if it is OFF in the current state.
if (!current_sram0) valid &= !sleep_sram0;
if (!current_sram1) valid &= !sleep_sram1;
// Wakeup state cannot turn OFF SRAM0 or SRAM1 if it is ON in the sleep state.
if (sleep_sram0) valid &= wakeup_sram0;
if (sleep_sram1) valid &= wakeup_sram1;
if (valid) {
// Prepare power sequencer to power SRAM domains on wakeup.
powman_clear_bits(&powman_hw->seq_cfg, POWMAN_SEQ_CFG_HW_PWRUP_SRAM0_BITS | POWMAN_SEQ_CFG_HW_PWRUP_SRAM1_BITS);
uint32_t seq_cfg_set = 0;
if (!powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SRAM_BANK0)) seq_cfg_set |= POWMAN_SEQ_CFG_HW_PWRUP_SRAM0_BITS;
if (!powman_power_state_is_domain_on(sleep_state, POWMAN_POWER_DOMAIN_SRAM_BANK1)) seq_cfg_set |= POWMAN_SEQ_CFG_HW_PWRUP_SRAM1_BITS;
// Sequencer SRAM power transitions from sleep to wakeup are: OFF->ON (0), ON->ON (1) and OFF->OFF (1)
if (sleep_sram0 == wakeup_sram0) seq_cfg_set |= POWMAN_SEQ_CFG_HW_PWRUP_SRAM0_BITS;
if (sleep_sram1 == wakeup_sram1) seq_cfg_set |= POWMAN_SEQ_CFG_HW_PWRUP_SRAM1_BITS;
powman_set_bits(&powman_hw->seq_cfg, seq_cfg_set);
}
return valid;
Expand Down