| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2013 Google Inc. |
| * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <arch/io.h> |
| #include <assert.h> |
| #include <console/console.h> |
| #include <soc/addressmap.h> |
| #include <soc/pmc.h> |
| #include <soc/power.h> |
| |
| static struct tegra_pmc_regs * const pmc = (void *)TEGRA_PMC_BASE; |
| |
| static int partition_powered(int id) |
| { |
| return read32(&pmc->pwrgate_status) & (0x1 << id); |
| } |
| |
| 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)) |
| ; |
| } |
| |
| printk(BIOS_INFO, "Ungated power partition %d.\n", id); |
| } |
| |
| uint8_t pmc_rst_status(void) |
| { |
| return read32(&pmc->rst_status) & PMC_RST_STATUS_SOURCE_MASK; |
| } |
| |
| static const char *pmc_rst_status_str[PMC_RST_STATUS_NUM_SOURCES] = { |
| [PMC_RST_STATUS_SOURCE_POR] = "POR", |
| [PMC_RST_STATUS_SOURCE_WATCHDOG] = "Watchdog", |
| [PMC_RST_STATUS_SOURCE_SENSOR] = "Sensor", |
| [PMC_RST_STATUS_SOURCE_SW_MAIN] = "SW Main", |
| [PMC_RST_STATUS_SOURCE_LP0] = "LP0", |
| }; |
| |
| void pmc_print_rst_status(void) |
| { |
| uint8_t rst_status = pmc_rst_status(); |
| assert(rst_status < PMC_RST_STATUS_NUM_SOURCES); |
| printk(BIOS_INFO, "PMC Reset Status: %s\n", |
| pmc_rst_status_str[rst_status]); |
| } |