636 lines
13 KiB
C
636 lines
13 KiB
C
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/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/* MSM CPU Subsystem power control operations
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*/
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#include <linux/bitops.h>
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#include <linux/cpu.h>
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#include <linux/cpumask.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/smp.h>
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#include <soc/qcom/cpu_pwr_ctl.h>
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#include <soc/qcom/spm.h>
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#include <soc/qcom/scm.h>
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#include <asm/barrier.h>
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#include <asm/cacheflush.h>
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#include <asm/smp_plat.h>
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/* CPU power domain register offsets */
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#define CPU_PWR_CTL 0x4
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#define CPU_PWR_GATE_CTL 0x14
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/* L2 power domain register offsets */
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#define L2_PWR_CTL_OVERRIDE 0xc
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#define L2_PWR_CTL 0x14
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#define L2_PWR_STATUS 0x18
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#define L2_CORE_CBCR 0x58
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/*
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* struct msm_l2ccc_of_info: represents of data for l2 cache clock controller.
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* @compat: compat string for l2 cache clock controller
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* @l2_pon: l2 cache power on routine
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*/
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struct msm_l2ccc_of_info {
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const char *compat;
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int (*l2_power_on) (struct device_node *dn, u32 l2_mask, int cpu);
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u32 l2_power_on_mask;
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};
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static int power_on_l2_msmtitanium(struct device_node *l2ccc_node, u32 pon_mask,
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int cpu)
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{
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u32 pon_status;
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void __iomem *l2_base;
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l2_base = of_iomap(l2ccc_node, 0);
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if (!l2_base)
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return -ENOMEM;
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/* Skip power-on sequence if l2 cache is already powered up */
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pon_status = (__raw_readl(l2_base + L2_PWR_STATUS) & pon_mask)
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== pon_mask;
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if (pon_status) {
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iounmap(l2_base);
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return 0;
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}
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/* Close Few of the head-switches for L2SCU logic */
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writel_relaxed(0x10F700, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* Close Rest of the head-switches for L2SCU logic */
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writel_relaxed(0x410F700, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* Assert PRESETDBG */
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writel_relaxed(0x400000, l2_base + L2_PWR_CTL_OVERRIDE);
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mb();
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udelay(2);
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/* De-assert L2/SCU memory Clamp */
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writel_relaxed(0x4103700, l2_base + L2_PWR_CTL);
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mb();
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/* Assert L2 memory slp_nret_n */
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writel_relaxed(0x4103703, l2_base + L2_PWR_CTL);
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mb();
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udelay(4);
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/* Assert L2 memory slp_ret_n */
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writel_relaxed(0x4101703, l2_base + L2_PWR_CTL);
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mb();
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udelay(4);
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/* Assert L2 memory wl_en_clk */
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writel_relaxed(0x4101783, l2_base + L2_PWR_CTL);
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mb();
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udelay(1);
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/* De-assert L2 memory wl_en_clk */
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writel_relaxed(0x4101703, l2_base + L2_PWR_CTL);
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mb();
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/* Enable clocks via SW_CLK_EN */
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writel_relaxed(0x01, l2_base + L2_CORE_CBCR);
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mb();
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/* De-assert L2/SCU logic clamp */
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writel_relaxed(0x4101603, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* De-assert PRESETDBG */
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writel_relaxed(0x0, l2_base + L2_PWR_CTL_OVERRIDE);
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mb();
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/* De-assert L2/SCU Logic reset */
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writel_relaxed(0x4100203, l2_base + L2_PWR_CTL);
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mb();
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udelay(54);
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/* Turn on the PMIC_APC */
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writel_relaxed(0x14100203, l2_base + L2_PWR_CTL);
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mb();
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/* Set H/W clock control for the cluster CBC block */
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writel_relaxed(0x03, l2_base + L2_CORE_CBCR);
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mb();
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iounmap(l2_base);
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return 0;
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}
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static int power_on_l2_msm8916(struct device_node *l2ccc_node, u32 pon_mask,
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int cpu)
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{
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u32 pon_status;
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void __iomem *l2_base;
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l2_base = of_iomap(l2ccc_node, 0);
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if (!l2_base)
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return -ENOMEM;
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/* Skip power-on sequence if l2 cache is already powered up*/
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pon_status = (__raw_readl(l2_base + L2_PWR_STATUS) & pon_mask)
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== pon_mask;
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if (pon_status) {
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iounmap(l2_base);
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return 0;
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}
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/* Close L2/SCU Logic GDHS and power up the cache */
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writel_relaxed(0x10D700, l2_base + L2_PWR_CTL);
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/* Assert PRESETDBGn */
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writel_relaxed(0x400000, l2_base + L2_PWR_CTL_OVERRIDE);
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mb();
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udelay(2);
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/* De-assert L2/SCU memory Clamp */
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writel_relaxed(0x101700, l2_base + L2_PWR_CTL);
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/* Wakeup L2/SCU RAMs by deasserting sleep signals */
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writel_relaxed(0x101703, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* Enable clocks via SW_CLK_EN */
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writel_relaxed(0x01, l2_base + L2_CORE_CBCR);
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/* De-assert L2/SCU logic clamp */
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writel_relaxed(0x101603, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* De-assert PRESSETDBg */
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writel_relaxed(0x0, l2_base + L2_PWR_CTL_OVERRIDE);
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/* De-assert L2/SCU Logic reset */
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writel_relaxed(0x100203, l2_base + L2_PWR_CTL);
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mb();
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udelay(54);
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/* Turn on the PMIC_APC */
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writel_relaxed(0x10100203, l2_base + L2_PWR_CTL);
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/* Set H/W clock control for the cpu CBC block */
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writel_relaxed(0x03, l2_base + L2_CORE_CBCR);
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mb();
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iounmap(l2_base);
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return 0;
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}
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static int power_on_l2_msm8937(struct device_node *l2ccc_node, u32 pon_mask,
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int cpu)
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{
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u32 pon_status;
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void __iomem *l2_base;
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l2_base = of_iomap(l2ccc_node, 0);
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if (!l2_base)
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return -ENOMEM;
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/* Skip power-on sequence if l2 cache is already powered up */
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pon_status = (__raw_readl(l2_base + L2_PWR_STATUS) & pon_mask)
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== pon_mask;
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if (pon_status) {
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iounmap(l2_base);
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return 0;
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}
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/* Close GDHS of L2SCU logic */
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writel_relaxed(0x0010D700, l2_base + L2_PWR_CTL);
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mb();
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/* Assert PRESETDBG */
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writel_relaxed(0x00400000, l2_base + L2_PWR_CTL_OVERRIDE);
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mb();
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udelay(2);
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/* De-assert L2/SCU memory clamp */
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writel_relaxed(0x00101700, l2_base + L2_PWR_CTL);
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mb();
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/* Wakeup L2/SCU RAMs - deassert slp signals */
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writel_relaxed(0x00101703, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* Enable clocks using SW CLK EN */
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writel_relaxed(0x00000001, l2_base + L2_CORE_CBCR);
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mb();
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/* De-assert L2/SCU logic Clamp */
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writel_relaxed(0x00101603, l2_base + L2_PWR_CTL);
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mb();
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udelay(2);
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/* De-assert PRESETDBG */
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writel_relaxed(0x00000000, l2_base + L2_PWR_CTL_OVERRIDE);
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mb();
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/* De-assert L2/SCU logic reset */
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writel_relaxed(0x00100203, l2_base + L2_PWR_CTL);
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mb();
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udelay(54);
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/* Set PMIC_APC_ON */
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writel_relaxed(0x10100203, l2_base + L2_PWR_CTL);
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mb();
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/* Set H/W clock control for the cluster CBC block */
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writel_relaxed(0x00000003, l2_base + L2_CORE_CBCR);
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mb();
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iounmap(l2_base);
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return 0;
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}
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static const struct msm_l2ccc_of_info l2ccc_info[] = {
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{
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.compat = "qcom,8916-l2ccc",
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.l2_power_on = power_on_l2_msm8916,
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.l2_power_on_mask = BIT(9),
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},
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{
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.compat = "qcom,titanium-l2ccc",
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.l2_power_on = power_on_l2_msmtitanium,
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.l2_power_on_mask = BIT(9) | BIT(28),
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},
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{
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.compat = "qcom,8937-l2ccc",
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.l2_power_on = power_on_l2_msm8937,
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.l2_power_on_mask = BIT(9) | BIT(28),
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},
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};
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static int power_on_l2_cache(struct device_node *l2ccc_node, int cpu)
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{
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int ret, i;
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const char *compat;
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ret = of_property_read_string(l2ccc_node, "compatible", &compat);
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if (ret)
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return ret;
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for (i = 0; i < ARRAY_SIZE(l2ccc_info); i++) {
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const struct msm_l2ccc_of_info *ptr = &l2ccc_info[i];
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if (!of_compat_cmp(ptr->compat, compat, strlen(compat)))
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return ptr->l2_power_on(l2ccc_node,
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ptr->l2_power_on_mask, cpu);
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}
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pr_err("Compat string not found for L2CCC node\n");
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return -EIO;
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}
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static inline void msmtitanium_unclamp_cpu(void __iomem *reg)
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{
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/* Deassert CPU in sleep state */
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writel_relaxed(0x00000033, reg + CPU_PWR_CTL);
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mb();
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/* Program skew between en_few and en_rest to 16 XO clk cycles,
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close Core logic head switch*/
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writel_relaxed(0x10000001, reg + CPU_PWR_GATE_CTL);
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mb();
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udelay(2);
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/* De-assert coremem clamp */
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writel_relaxed(0x00000031, reg + CPU_PWR_CTL);
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mb();
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/* De-assert Core memory slp_nret_n */
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writel_relaxed(0x00000039, reg + CPU_PWR_CTL);
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mb();
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udelay(2);
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/* De-assert Core memory slp_ret_n */
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writel_relaxed(0x00000239, reg + CPU_PWR_CTL);
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mb();
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udelay(2);
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/* Assert WL_EN_CLK */
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writel_relaxed(0x00004239, reg + CPU_PWR_CTL);
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mb();
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udelay(2);
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/* De-assert WL_EN_CLK */
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writel_relaxed(0x00000239, reg + CPU_PWR_CTL);
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mb();
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/* Deassert Clamp */
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writel_relaxed(0x00000238, reg + CPU_PWR_CTL);
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mb();
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udelay(2);
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/* Deassert Core-n reset */
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writel_relaxed(0x00000208, reg + CPU_PWR_CTL);
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mb();
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/* Assert PWRDUP; */
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writel_relaxed(0x00000288, reg + CPU_PWR_CTL);
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mb();
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}
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int msmtitanium_unclamp_secondary_arm_cpu(unsigned int cpu)
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{
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int ret = 0;
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struct device_node *cpu_node, *acc_node, *l2_node, *l2ccc_node;
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void __iomem *reg;
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cpu_node = of_get_cpu_node(cpu, NULL);
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if (!cpu_node)
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return -ENODEV;
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acc_node = of_parse_phandle(cpu_node, "qcom,acc", 0);
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if (!acc_node) {
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ret = -ENODEV;
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goto out_acc;
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}
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l2_node = of_parse_phandle(cpu_node, "next-level-cache", 0);
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if (!l2_node) {
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ret = -ENODEV;
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goto out_l2;
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}
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l2ccc_node = of_parse_phandle(l2_node, "power-domain", 0);
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if (!l2ccc_node) {
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ret = -ENODEV;
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goto out_l2ccc;
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}
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/*
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* Ensure L2-cache of the CPU is powered on before
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* unclamping cpu power rails.
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*/
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ret = power_on_l2_cache(l2ccc_node, cpu);
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if (ret) {
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pr_err("L2 cache power up failed for CPU%d\n", cpu);
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goto out_acc_reg;
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}
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reg = of_iomap(acc_node, 0);
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if (!reg) {
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ret = -ENOMEM;
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goto out_acc_reg;
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}
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msmtitanium_unclamp_cpu(reg);
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/* Secondary CPU-N is now alive */
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iounmap(reg);
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out_acc_reg:
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of_node_put(l2ccc_node);
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out_l2ccc:
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of_node_put(l2_node);
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out_l2:
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of_node_put(acc_node);
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out_acc:
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of_node_put(cpu_node);
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return ret;
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}
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static inline void msm8937_unclamp_cpu(void __iomem *reg)
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{
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/* Assert reset */
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writel_relaxed(0x00000033, reg + CPU_PWR_CTL);
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mb();
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/* Program skew between en_few and en_rest to 16 XO clk cycles,
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close Core logic head switch*/
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writel_relaxed(0x10000001, reg + CPU_PWR_GATE_CTL);
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mb();
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udelay(2);
|
||
|
|
||
|
/* De-assert coremem clamp */
|
||
|
writel_relaxed(0x00000031, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
|
||
|
/* Close coremem array gdhs */
|
||
|
writel_relaxed(0x00000039, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
udelay(2);
|
||
|
|
||
|
/* De-assert clamp */
|
||
|
writel_relaxed(0x00020038, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
udelay(2);
|
||
|
|
||
|
/* De-assert core-n reset */
|
||
|
writel_relaxed(0x00020008, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
|
||
|
/* Assert PWRDUP; */
|
||
|
writel_relaxed(0x00020088, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
}
|
||
|
|
||
|
|
||
|
int msm8937_unclamp_secondary_arm_cpu(unsigned int cpu)
|
||
|
{
|
||
|
|
||
|
int ret = 0;
|
||
|
struct device_node *cpu_node, *acc_node, *l2_node, *l2ccc_node;
|
||
|
void __iomem *reg;
|
||
|
|
||
|
cpu_node = of_get_cpu_node(cpu, NULL);
|
||
|
if (!cpu_node)
|
||
|
return -ENODEV;
|
||
|
|
||
|
acc_node = of_parse_phandle(cpu_node, "qcom,acc", 0);
|
||
|
if (!acc_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_acc;
|
||
|
}
|
||
|
|
||
|
l2_node = of_parse_phandle(cpu_node, "next-level-cache", 0);
|
||
|
if (!l2_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_l2;
|
||
|
}
|
||
|
|
||
|
l2ccc_node = of_parse_phandle(l2_node, "power-domain", 0);
|
||
|
if (!l2ccc_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_l2ccc;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Ensure L2-cache of the CPU is powered on before
|
||
|
* unclamping cpu power rails.
|
||
|
*/
|
||
|
ret = power_on_l2_cache(l2ccc_node, cpu);
|
||
|
if (ret) {
|
||
|
pr_err("L2 cache power up failed for CPU%d\n", cpu);
|
||
|
goto out_acc_reg;
|
||
|
}
|
||
|
|
||
|
reg = of_iomap(acc_node, 0);
|
||
|
if (!reg) {
|
||
|
ret = -ENOMEM;
|
||
|
goto out_acc_reg;
|
||
|
}
|
||
|
|
||
|
msm8937_unclamp_cpu(reg);
|
||
|
|
||
|
/* Secondary CPU-N is now alive */
|
||
|
iounmap(reg);
|
||
|
out_acc_reg:
|
||
|
of_node_put(l2ccc_node);
|
||
|
out_l2ccc:
|
||
|
of_node_put(l2_node);
|
||
|
out_l2:
|
||
|
of_node_put(acc_node);
|
||
|
out_acc:
|
||
|
of_node_put(cpu_node);
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
int msm_unclamp_secondary_arm_cpu(unsigned int cpu)
|
||
|
{
|
||
|
|
||
|
int ret = 0;
|
||
|
struct device_node *cpu_node, *acc_node, *l2_node, *l2ccc_node;
|
||
|
void __iomem *reg;
|
||
|
|
||
|
cpu_node = of_get_cpu_node(cpu, NULL);
|
||
|
if (!cpu_node)
|
||
|
return -ENODEV;
|
||
|
|
||
|
acc_node = of_parse_phandle(cpu_node, "qcom,acc", 0);
|
||
|
if (!acc_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_acc;
|
||
|
}
|
||
|
|
||
|
l2_node = of_parse_phandle(cpu_node, "next-level-cache", 0);
|
||
|
if (!l2_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_l2;
|
||
|
}
|
||
|
|
||
|
l2ccc_node = of_parse_phandle(l2_node, "power-domain", 0);
|
||
|
if (!l2ccc_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_l2;
|
||
|
}
|
||
|
|
||
|
/* Ensure L2-cache of the CPU is powered on before
|
||
|
* unclamping cpu power rails.
|
||
|
*/
|
||
|
ret = power_on_l2_cache(l2ccc_node, cpu);
|
||
|
if (ret) {
|
||
|
pr_err("L2 cache power up failed for CPU%d\n", cpu);
|
||
|
goto out_l2ccc;
|
||
|
}
|
||
|
|
||
|
reg = of_iomap(acc_node, 0);
|
||
|
if (!reg) {
|
||
|
ret = -ENOMEM;
|
||
|
goto out_acc_reg;
|
||
|
}
|
||
|
|
||
|
/* Assert Reset on cpu-n */
|
||
|
writel_relaxed(0x00000033, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
|
||
|
/*Program skew to 16 X0 clock cycles*/
|
||
|
writel_relaxed(0x10000001, reg + CPU_PWR_GATE_CTL);
|
||
|
mb();
|
||
|
udelay(2);
|
||
|
|
||
|
/* De-assert coremem clamp */
|
||
|
writel_relaxed(0x00000031, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
|
||
|
/* Close coremem array gdhs */
|
||
|
writel_relaxed(0x00000039, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
udelay(2);
|
||
|
|
||
|
/* De-assert cpu-n clamp */
|
||
|
writel_relaxed(0x00020038, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
udelay(2);
|
||
|
|
||
|
/* De-assert cpu-n reset */
|
||
|
writel_relaxed(0x00020008, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
|
||
|
/* Assert PWRDUP signal on core-n */
|
||
|
writel_relaxed(0x00020088, reg + CPU_PWR_CTL);
|
||
|
mb();
|
||
|
|
||
|
/* Secondary CPU-N is now alive */
|
||
|
iounmap(reg);
|
||
|
out_acc_reg:
|
||
|
of_node_put(l2ccc_node);
|
||
|
out_l2ccc:
|
||
|
of_node_put(l2_node);
|
||
|
out_l2:
|
||
|
of_node_put(acc_node);
|
||
|
out_acc:
|
||
|
of_node_put(cpu_node);
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
int msm_unclamp_secondary_arm_cpu_sim(unsigned int cpu)
|
||
|
{
|
||
|
int ret = 0;
|
||
|
struct device_node *cpu_node, *acc_node;
|
||
|
void __iomem *reg;
|
||
|
|
||
|
cpu_node = of_get_cpu_node(cpu, NULL);
|
||
|
if (!cpu_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_acc;
|
||
|
}
|
||
|
|
||
|
acc_node = of_parse_phandle(cpu_node, "qcom,acc", 0);
|
||
|
if (!acc_node) {
|
||
|
ret = -ENODEV;
|
||
|
goto out_acc;
|
||
|
}
|
||
|
|
||
|
reg = of_iomap(acc_node, 0);
|
||
|
if (!reg) {
|
||
|
ret = -ENOMEM;
|
||
|
goto out_acc;
|
||
|
}
|
||
|
|
||
|
writel_relaxed(0x800, reg + CPU_PWR_CTL);
|
||
|
writel_relaxed(0x3FFF, reg + CPU_PWR_GATE_CTL);
|
||
|
mb();
|
||
|
iounmap(reg);
|
||
|
|
||
|
out_acc:
|
||
|
of_node_put(cpu_node);
|
||
|
|
||
|
return ret;
|
||
|
}
|