diff options
author | Sumit Singh <sumsingh@nvidia.com> | 2014-03-04 20:20:49 +0530 |
---|---|---|
committer | Bharat Nihalani <bnihalani@nvidia.com> | 2014-03-25 06:34:32 -0700 |
commit | 6f8dc441dd508a971d4c4c6c60a7bdff4c53dc90 (patch) | |
tree | 3cfa81a4f923a51cb9bd29bbb0e15878fc48c183 /drivers/platform | |
parent | 3a410dfea95e5e46b690c2853fb265748d0841f7 (diff) |
ARM: tegra: migrating pmc.c to drivers/
Moving pmc.c from mach-tegra/ to drivers/platform/tegra/
as codes have to be shared between arm and arm64.
Bug 1440573
Change-Id: Ic06c25d74fd2ca4d44eedd129ebcc71d8afa88f2
Signed-off-by: Sumit Singh <sumsingh@nvidia.com>
Reviewed-on: http://git-master/r/377302
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r-- | drivers/platform/tegra/Makefile | 2 | ||||
-rw-r--r-- | drivers/platform/tegra/pmc.c | 346 |
2 files changed, 345 insertions, 3 deletions
diff --git a/drivers/platform/tegra/Makefile b/drivers/platform/tegra/Makefile index 103d157272ac..cabfc5602800 100644 --- a/drivers/platform/tegra/Makefile +++ b/drivers/platform/tegra/Makefile @@ -13,6 +13,7 @@ endif endif obj-y += mc/ +obj-y += pmc.o ifneq ($(CONFIG_ARM64),) @@ -76,7 +77,6 @@ obj-y += tegra_emc.o obj-$(CONFIG_ARCH_TEGRA_12x_SOC) += tegra12_emc.o obj-$(CONFIG_ARCH_TEGRA_12x_SOC) += tegra_emc_dt_parse.o -obj-y += pmc.o obj-y += flowctrl.o obj-y += reset.o obj-$(CONFIG_DEBUG_ICEDCC) += sysfs-dcc.o diff --git a/drivers/platform/tegra/pmc.c b/drivers/platform/tegra/pmc.c index 047a911c7b45..0cf55d070a17 100644 --- a/drivers/platform/tegra/pmc.c +++ b/drivers/platform/tegra/pmc.c @@ -1,2 +1,344 @@ -/* Automatically generated file; DO NOT EDIT. */ -#include "../../../arch/arm/mach-tegra/pmc.c" +/* + * Copyright (C) 2012-2014, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. + * + */ + +#include <linux/kernel.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/export.h> +#include <linux/tegra-pmc.h> + + + +#define PMC_CTRL 0x0 +#define PMC_CTRL_INTR_LOW (1 << 17) +#define PMC_PWRGATE_TOGGLE 0x30 +#define PMC_PWRGATE_TOGGLE_START (1 << 8) +#define PMC_REMOVE_CLAMPING 0x34 +#define PMC_PWRGATE_STATUS 0x38 + +#define PMC_CPUPWRGOOD_TIMER 0xc8 +#define PMC_CPUPWROFF_TIMER 0xcc + +#define TEGRA_POWERGATE_PCIE 3 +#define TEGRA_POWERGATE_VDEC 4 +#define TEGRA_POWERGATE_CPU1 9 +#define TEGRA_POWERGATE_CPU2 10 +#define TEGRA_POWERGATE_CPU3 11 + +#define PMC_DPD_SAMPLE 0x20 +#define PMC_IO_DPD_REQ 0x1B8 +#define PMC_IO_DPD2_REQ 0x1C0 + +static u8 tegra_cpu_domains[] = { + 0xFF, /* not available for CPU0 */ + TEGRA_POWERGATE_CPU1, + TEGRA_POWERGATE_CPU2, + TEGRA_POWERGATE_CPU3, +}; +static DEFINE_SPINLOCK(tegra_powergate_lock); + +static void __iomem *tegra_pmc_base; +static bool tegra_pmc_invert_interrupt; +#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) +static struct clk *tegra_pclk; +#endif + +#ifdef CONFIG_OF +static struct pmc_pm_data pmc_pm_data; +#endif +struct pmc_pm_data *tegra_get_pm_data() +{ +#ifdef CONFIG_OF + /* + * Some boards have CONFIG_OF defined but no dts files + */ + if (!tegra_pmc_base) + return NULL; + return &pmc_pm_data; +#else + return NULL; +#endif +} +EXPORT_SYMBOL(tegra_get_pm_data); + +static inline u32 tegra_pmc_readl(u32 reg) +{ +#if defined(CONFIG_OF) + return readl(tegra_pmc_base + reg); +#else + return readl(IO_ADDRESS(TEGRA_PMC_BASE + reg)); +#endif +} + +static inline void tegra_pmc_writel(u32 val, u32 reg) +{ +#if defined(CONFIG_OF) + writel(val, tegra_pmc_base + reg); +#else + writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg)); + return readl(IO_ADDRESS(TEGRA_PMC_BASE + reg)); +#endif +} + +void tegra_pmc_set_dpd_sample() +{ + tegra_pmc_writel(0x1, PMC_DPD_SAMPLE); +} +EXPORT_SYMBOL(tegra_pmc_set_dpd_sample); + +void tegra_pmc_clear_dpd_sample() +{ + tegra_pmc_writel(0x0, PMC_DPD_SAMPLE); +} +EXPORT_SYMBOL(tegra_pmc_clear_dpd_sample); + +void tegra_pmc_remove_dpd_req() +{ + tegra_pmc_writel(0x400fffff, PMC_IO_DPD_REQ); + tegra_pmc_writel(0x40001fff, PMC_IO_DPD2_REQ); +} +EXPORT_SYMBOL(tegra_pmc_remove_dpd_req); + +void tegra_pmc_pmu_interrupt_polarity(bool active_low) +{ + u32 pmc_ctrl; + + pmc_ctrl = tegra_pmc_readl(PMC_CTRL); + if (active_low) + pmc_ctrl |= PMC_CTRL_INTR_LOW; + else + pmc_ctrl &= ~PMC_CTRL_INTR_LOW; + tegra_pmc_writel(pmc_ctrl, PMC_CTRL); +} +EXPORT_SYMBOL(tegra_pmc_pmu_interrupt_polarity); + +static int tegra_pmc_get_cpu_powerdomain_id(int cpuid) +{ + if (cpuid <= 0 || cpuid >= num_possible_cpus()) + return -EINVAL; + return tegra_cpu_domains[cpuid]; +} + +static bool tegra_pmc_powergate_is_powered(int id) +{ + return (tegra_pmc_readl(PMC_PWRGATE_STATUS) >> id) & 1; +} + +static int tegra_pmc_powergate_set(int id, bool new_state) +{ + bool old_state; + unsigned long flags; + + spin_lock_irqsave(&tegra_powergate_lock, flags); + + old_state = tegra_pmc_powergate_is_powered(id); + WARN_ON(old_state == new_state); + + tegra_pmc_writel(PMC_PWRGATE_TOGGLE_START | id, PMC_PWRGATE_TOGGLE); + + spin_unlock_irqrestore(&tegra_powergate_lock, flags); + + return 0; +} + +static int tegra_pmc_powergate_remove_clamping(int id) +{ + u32 mask; + + /* + * Tegra has a bug where PCIE and VDE clamping masks are + * swapped relatively to the partition ids. + */ + if (id == TEGRA_POWERGATE_VDEC) + mask = (1 << TEGRA_POWERGATE_PCIE); + else if (id == TEGRA_POWERGATE_PCIE) + mask = (1 << TEGRA_POWERGATE_VDEC); + else + mask = (1 << id); + + tegra_pmc_writel(mask, PMC_REMOVE_CLAMPING); + + return 0; +} + +bool tegra_pmc_cpu_is_powered(int cpuid) +{ + int id; + + id = tegra_pmc_get_cpu_powerdomain_id(cpuid); + if (id < 0) + return false; + return tegra_pmc_powergate_is_powered(id); +} + +int tegra_pmc_cpu_power_on(int cpuid) +{ + int id; + + id = tegra_pmc_get_cpu_powerdomain_id(cpuid); + if (id < 0) + return id; + return tegra_pmc_powergate_set(id, true); +} + +int tegra_pmc_cpu_remove_clamping(int cpuid) +{ + int id; + + id = tegra_pmc_get_cpu_powerdomain_id(cpuid); + if (id < 0) + return id; + return tegra_pmc_powergate_remove_clamping(id); +} + +#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) && defined(CONFIG_PM_SLEEP) +void set_power_timers(unsigned long us_on, unsigned long us_off) +{ + unsigned long long ticks; + unsigned long long pclk; + unsigned long rate; + static unsigned long tegra_last_pclk; + + rate = clk_get_rate(tegra_pclk); + if (WARN_ON_ONCE(rate <= 0)) + pclk = 100000000; + else + pclk = rate; + + if ((rate != tegra_last_pclk)) { + ticks = (us_on * pclk) + 999999ull; + do_div(ticks, 1000000); + tegra_pmc_writel((unsigned long)ticks, PMC_CPUPWRGOOD_TIMER); + + ticks = (us_off * pclk) + 999999ull; + do_div(ticks, 1000000); + tegra_pmc_writel((unsigned long)ticks, PMC_CPUPWROFF_TIMER); + wmb(); + } + tegra_last_pclk = pclk; +} +#endif + +static const struct of_device_id matches[] __initconst = { + { .compatible = "nvidia,tegra124-pmc" }, + { .compatible = "nvidia,tegra148-pmc" }, + { .compatible = "nvidia,tegra114-pmc" }, + { .compatible = "nvidia,tegra30-pmc" }, + { .compatible = "nvidia,tegra20-pmc" }, + { } +}; + +static void tegra_pmc_parse_dt(void) +{ + struct device_node *np; + u32 prop; + enum tegra_suspend_mode suspend_mode; + u32 core_good_time[2] = {0, 0}; + u32 lp0_vec[2] = {0, 0}; + + np = of_find_matching_node(NULL, matches); + BUG_ON(!np); + + tegra_pmc_base = of_iomap(np, 0); + + tegra_pmc_invert_interrupt = of_property_read_bool(np, + "nvidia,invert-interrupt"); +#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) + tegra_pclk = of_clk_get_by_name(np, "pclk"); + WARN_ON(IS_ERR(tegra_pclk)); +#endif + + /* Grabbing the power management configurations */ + if (of_property_read_u32(np, "nvidia,suspend-mode", &prop)) { + suspend_mode = TEGRA_SUSPEND_NONE; + } else { + switch (prop) { + case 0: + suspend_mode = TEGRA_SUSPEND_LP0; + break; + case 1: + suspend_mode = TEGRA_SUSPEND_LP1; + break; + case 2: + suspend_mode = TEGRA_SUSPEND_LP2; + break; + default: + suspend_mode = TEGRA_SUSPEND_NONE; + break; + } + } + + if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &prop)) + suspend_mode = TEGRA_SUSPEND_NONE; + pmc_pm_data.cpu_good_time = prop; + + if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &prop)) + suspend_mode = TEGRA_SUSPEND_NONE; + pmc_pm_data.cpu_off_time = prop; + + if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time", + core_good_time, ARRAY_SIZE(core_good_time))) + suspend_mode = TEGRA_SUSPEND_NONE; + pmc_pm_data.core_osc_time = core_good_time[0]; + pmc_pm_data.core_pmu_time = core_good_time[1]; + + if (of_property_read_u32(np, "nvidia,core-pwr-off-time", + &prop)) + suspend_mode = TEGRA_SUSPEND_NONE; + pmc_pm_data.core_off_time = prop; + + pmc_pm_data.corereq_high = of_property_read_bool(np, + "nvidia,core-power-req-active-high"); + + pmc_pm_data.sysclkreq_high = of_property_read_bool(np, + "nvidia,sys-clock-req-active-high"); + + pmc_pm_data.combined_req = of_property_read_bool(np, + "nvidia,combined-power-req"); + + pmc_pm_data.cpu_pwr_good_en = of_property_read_bool(np, + "nvidia,cpu-pwr-good-en"); + + if (of_property_read_u32_array(np, "nvidia,lp0-vec", lp0_vec, + ARRAY_SIZE(lp0_vec))) + if (suspend_mode == TEGRA_SUSPEND_LP0) + suspend_mode = TEGRA_SUSPEND_LP1; + + pmc_pm_data.lp0_vec_phy_addr = lp0_vec[0]; + pmc_pm_data.lp0_vec_size = lp0_vec[1]; + + pmc_pm_data.suspend_mode = suspend_mode; +} + +static int __init tegra_pmc_init(void) +{ + u32 val; + + tegra_pmc_parse_dt(); + + val = tegra_pmc_readl(PMC_CTRL); + if (tegra_pmc_invert_interrupt) + val |= PMC_CTRL_INTR_LOW; + else + val &= ~PMC_CTRL_INTR_LOW; + tegra_pmc_writel(val, PMC_CTRL); + + return 0; +} +postcore_initcall(tegra_pmc_init); |