/* SPDX-License-Identifier: GPL-2.0-only */ #include <device/mmio.h> #include <console/console.h> #include <soc/addressmap.h> #include <soc/clock.h> #include <soc/flow.h> #include <soc/pmc.h> #include <soc/power.h> static struct tegra_pmc_regs * const pmc = (void *)TEGRA_PMC_BASE; static struct flow_ctlr * const flow = (void *)TEGRA_FLOW_BASE; static int partition_powered(int id) { return read32(&pmc->pwrgate_status) & (0x1 << id); } static int partition_clamp_on(int id) { return read32(&pmc->clamp_status) & (0x1 << id); } static void power_ungate_partition(uint32_t id) { printk(BIOS_INFO, "Ungating power partition %d.\n", id); if (!partition_powered(id)) { uint32_t pwrgate_toggle = read32(&pmc->pwrgate_toggle); pwrgate_toggle &= ~(PMC_PWRGATE_TOGGLE_PARTID_MASK); pwrgate_toggle |= (id << PMC_PWRGATE_TOGGLE_PARTID_SHIFT); pwrgate_toggle |= PMC_PWRGATE_TOGGLE_START; write32(&pmc->pwrgate_toggle, pwrgate_toggle); // Wait for the request to be accepted. while (read32(&pmc->pwrgate_toggle) & PMC_PWRGATE_TOGGLE_START) ; printk(BIOS_DEBUG, "Power gate toggle request accepted.\n"); // Wait for the partition to be powered. while (!partition_powered(id)) ; // Wait for clamp off. while (partition_clamp_on(id)) ; } printk(BIOS_INFO, "Ungated power partition %d.\n", id); } void power_enable_and_ungate_cpu(void) { /* * Set CPUPWRGOOD_TIMER - APB clock is 1/2 of SCLK (150MHz), * set it for 5ms as per SysEng (5ms * PCLK_KHZ * 1000 / 1s). */ write32(&pmc->cpupwrgood_timer, (TEGRA_PCLK_KHZ * 5)); uint32_t cntrl = read32(&pmc->cntrl); cntrl &= ~PMC_CNTRL_CPUPWRREQ_POLARITY; cntrl |= PMC_CNTRL_CPUPWRREQ_OE; write32(&pmc->cntrl, cntrl); power_ungate_partition(POWER_PARTID_CRAIL); // Ungate power to the non-core parts of the fast cluster. power_ungate_partition(POWER_PARTID_C0NC); // Ungate power to CPU0 in the fast cluster. power_ungate_partition(POWER_PARTID_CE0); } int power_reset_status(void) { return read32(&pmc->rst_status) & 0x7; } void ram_repair(void) { // Request RAM repair for cluster 0 setbits32(&flow->ram_repair, RAM_REPAIR_REQ); // Poll for completion while (!(read32(&flow->ram_repair) & RAM_REPAIR_STS)) ; // Request RAM repair for cluster 1 setbits32(&flow->ram_repair_cluster1, RAM_REPAIR_REQ); // Poll for completion while (!(read32(&flow->ram_repair_cluster1) & RAM_REPAIR_STS)) ; }