| /* |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <soc/addressmap.h> |
| |
| #include "pmc.h" |
| #include "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(pwrgate_toggle, &pmc->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); |
| } |