diff options
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/board.h | 7 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/platsmp.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/pm.c | 32 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/pm.h | 10 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/pmc.c | 414 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/pmc.h | 49 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/powergate.c | 516 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra.c | 7 |
9 files changed, 27 insertions, 1012 deletions
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile index c303b55..e48a744 100644 --- a/arch/arm/mach-tegra/Makefile +++ b/arch/arm/mach-tegra/Makefile @@ -2,9 +2,7 @@ asflags-y += -march=armv7-a obj-y += io.o obj-y += irq.o -obj-y += pmc.o obj-y += flowctrl.o -obj-y += powergate.o obj-y += pm.o obj-y += reset.o obj-y += reset-handler.o diff --git a/arch/arm/mach-tegra/board.h b/arch/arm/mach-tegra/board.h index bcf5dbf..da90c89 100644 --- a/arch/arm/mach-tegra/board.h +++ b/arch/arm/mach-tegra/board.h @@ -28,13 +28,6 @@ void __init tegra_map_common_io(void); void __init tegra_init_irq(void); -int __init tegra_powergate_init(void); -#if defined(CONFIG_ARCH_TEGRA_2x_SOC) && defined(CONFIG_DEBUG_FS) -int __init tegra_powergate_debugfs_init(void); -#else -static inline int tegra_powergate_debugfs_init(void) { return 0; } -#endif - void __init tegra_paz00_wifikill_init(void); #endif diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c index 0466a14..b450866 100644 --- a/arch/arm/mach-tegra/platsmp.c +++ b/arch/arm/mach-tegra/platsmp.c @@ -22,6 +22,7 @@ #include <linux/smp.h> #include <soc/tegra/fuse.h> +#include <soc/tegra/pmc.h> #include <asm/cacheflush.h> #include <asm/mach-types.h> @@ -31,7 +32,6 @@ #include "common.h" #include "flowctrl.h" #include "iomap.h" -#include "pmc.h" #include "reset.h" static cpumask_t tegra_cpu_init_mask; diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 94db3b6..b0f48a3 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -28,6 +28,8 @@ #include <linux/suspend.h> #include <soc/tegra/fuse.h> +#include <soc/tegra/pm.h> +#include <soc/tegra/pmc.h> #include <asm/cacheflush.h> #include <asm/idmap.h> @@ -38,7 +40,6 @@ #include "flowctrl.h" #include "iomap.h" -#include "pmc.h" #include "pm.h" #include "reset.h" #include "sleep.h" @@ -167,9 +168,29 @@ static int tegra_sleep_cpu(unsigned long v2p) return 0; } +static void tegra_pm_set(enum tegra_suspend_mode mode) +{ + u32 value; + + switch (tegra_get_chip_id()) { + case TEGRA20: + case TEGRA30: + break; + default: + /* Turn off CRAIL */ + value = flowctrl_read_cpu_csr(0); + value &= ~FLOW_CTRL_CSR_ENABLE_EXT_MASK; + value |= FLOW_CTRL_CSR_ENABLE_EXT_CRAIL; + flowctrl_write_cpu_csr(0, value); + break; + } + + tegra_pmc_enter_suspend_mode(mode); +} + void tegra_idle_lp2_last(void) { - tegra_pmc_pm_set(TEGRA_SUSPEND_LP2); + tegra_pm_set(TEGRA_SUSPEND_LP2); cpu_cluster_pm_enter(); suspend_cpu_complex(); @@ -268,8 +289,6 @@ static bool tegra_sleep_core_init(void) static void tegra_suspend_enter_lp1(void) { - tegra_pmc_suspend(); - /* copy the reset vector & SDRAM shutdown code into IRAM */ memcpy(iram_save_addr, IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA), iram_save_size); @@ -281,8 +300,6 @@ static void tegra_suspend_enter_lp1(void) static void tegra_suspend_exit_lp1(void) { - tegra_pmc_resume(); - /* restore IRAM */ memcpy(IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA), iram_save_addr, iram_save_size); @@ -307,7 +324,7 @@ static int tegra_suspend_enter(suspend_state_t state) pr_info("Entering suspend state %s\n", lp_state[mode]); - tegra_pmc_pm_set(mode); + tegra_pm_set(mode); local_fiq_disable(); @@ -355,7 +372,6 @@ void __init tegra_init_suspend(void) return; tegra_tear_down_cpu_init(); - tegra_pmc_suspend_init(); if (mode >= TEGRA_SUSPEND_LP1) { if (!tegra_lp1_iram_hook() || !tegra_sleep_core_init()) { diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h index f4a8969..83bc875 100644 --- a/arch/arm/mach-tegra/pm.h +++ b/arch/arm/mach-tegra/pm.h @@ -21,12 +21,11 @@ #ifndef _MACH_TEGRA_PM_H_ #define _MACH_TEGRA_PM_H_ -#include "pmc.h" - struct tegra_lp1_iram { void *start_addr; void *end_addr; }; + extern struct tegra_lp1_iram tegra_lp1_iram; extern void (*tegra_sleep_core_finish)(unsigned long v2p); @@ -42,15 +41,8 @@ void tegra_idle_lp2_last(void); extern void (*tegra_tear_down_cpu)(void); #ifdef CONFIG_PM_SLEEP -enum tegra_suspend_mode tegra_pm_validate_suspend_mode( - enum tegra_suspend_mode mode); void tegra_init_suspend(void); #else -static inline enum tegra_suspend_mode tegra_pm_validate_suspend_mode( - enum tegra_suspend_mode mode) -{ - return TEGRA_SUSPEND_NONE; -} static inline void tegra_init_suspend(void) {} #endif diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c deleted file mode 100644 index 69df180..0000000 --- a/arch/arm/mach-tegra/pmc.c +++ /dev/null @@ -1,414 +0,0 @@ -/* - * Copyright (C) 2012,2013 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/clk.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/of.h> -#include <linux/of_address.h> - -#include <soc/tegra/fuse.h> -#include <soc/tegra/powergate.h> - -#include "flowctrl.h" -#include "pm.h" -#include "pmc.h" -#include "sleep.h" - -#define TEGRA_POWER_SYSCLK_POLARITY (1 << 10) /* sys clk polarity */ -#define TEGRA_POWER_SYSCLK_OE (1 << 11) /* system clock enable */ -#define TEGRA_POWER_EFFECT_LP0 (1 << 14) /* LP0 when CPU pwr gated */ -#define TEGRA_POWER_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */ -#define TEGRA_POWER_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */ - -#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_SCRATCH0 0x50 -#define PMC_SCRATCH0_MODE_RECOVERY (1 << 31) -#define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30) -#define PMC_SCRATCH0_MODE_RCM (1 << 1) -#define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \ - PMC_SCRATCH0_MODE_BOOTLOADER | \ - PMC_SCRATCH0_MODE_RCM) - -#define PMC_CPUPWRGOOD_TIMER 0xc8 -#define PMC_CPUPWROFF_TIMER 0xcc - -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; -static struct clk *tegra_pclk; - -struct pmc_pm_data { - u32 cpu_good_time; /* CPU power good time in uS */ - u32 cpu_off_time; /* CPU power off time in uS */ - u32 core_osc_time; /* Core power good osc time in uS */ - u32 core_pmu_time; /* Core power good pmu time in uS */ - u32 core_off_time; /* Core power off time in uS */ - bool corereq_high; /* Core power request active-high */ - bool sysclkreq_high; /* System clock request active-high */ - bool combined_req; /* Combined pwr req for CPU & Core */ - bool cpu_pwr_good_en; /* CPU power good signal is enabled */ - u32 lp0_vec_phy_addr; /* The phy addr of LP0 warm boot code */ - u32 lp0_vec_size; /* The size of LP0 warm boot code */ - enum tegra_suspend_mode suspend_mode; -}; -static struct pmc_pm_data pmc_pm_data; - -static inline u32 tegra_pmc_readl(u32 reg) -{ - return readl(tegra_pmc_base + reg); -} - -static inline void tegra_pmc_writel(u32 val, u32 reg) -{ - writel(val, tegra_pmc_base + reg); -} - -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); -} - -void tegra_pmc_restart(enum reboot_mode mode, const char *cmd) -{ - u32 val; - - val = tegra_pmc_readl(PMC_SCRATCH0); - val &= ~PMC_SCRATCH0_MODE_MASK; - - if (cmd) { - if (strcmp(cmd, "recovery") == 0) - val |= PMC_SCRATCH0_MODE_RECOVERY; - - if (strcmp(cmd, "bootloader") == 0) - val |= PMC_SCRATCH0_MODE_BOOTLOADER; - - if (strcmp(cmd, "forced-recovery") == 0) - val |= PMC_SCRATCH0_MODE_RCM; - } - - tegra_pmc_writel(val, PMC_SCRATCH0); - - val = tegra_pmc_readl(0); - val |= 0x10; - tegra_pmc_writel(val, 0); -} - -#ifdef CONFIG_PM_SLEEP -static void set_power_timers(u32 us_on, u32 us_off, unsigned long rate) -{ - unsigned long long ticks; - unsigned long long pclk; - static unsigned long tegra_last_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; -} - -enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void) -{ - return pmc_pm_data.suspend_mode; -} - -void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode) -{ - if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE) - return; - - pmc_pm_data.suspend_mode = mode; -} - -void tegra_pmc_suspend(void) -{ - tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41); -} - -void tegra_pmc_resume(void) -{ - tegra_pmc_writel(0x0, PMC_SCRATCH41); -} - -void tegra_pmc_pm_set(enum tegra_suspend_mode mode) -{ - u32 reg, csr_reg; - unsigned long rate = 0; - - reg = tegra_pmc_readl(PMC_CTRL); - reg |= TEGRA_POWER_CPU_PWRREQ_OE; - reg &= ~TEGRA_POWER_EFFECT_LP0; - - switch (tegra_get_chip_id()) { - case TEGRA20: - case TEGRA30: - break; - default: - /* Turn off CRAIL */ - csr_reg = flowctrl_read_cpu_csr(0); - csr_reg &= ~FLOW_CTRL_CSR_ENABLE_EXT_MASK; - csr_reg |= FLOW_CTRL_CSR_ENABLE_EXT_CRAIL; - flowctrl_write_cpu_csr(0, csr_reg); - break; - } - - switch (mode) { - case TEGRA_SUSPEND_LP1: - rate = 32768; - break; - case TEGRA_SUSPEND_LP2: - rate = clk_get_rate(tegra_pclk); - break; - default: - break; - } - - set_power_timers(pmc_pm_data.cpu_good_time, pmc_pm_data.cpu_off_time, - rate); - - tegra_pmc_writel(reg, PMC_CTRL); -} - -void tegra_pmc_suspend_init(void) -{ - u32 reg; - - /* Always enable CPU power request */ - reg = tegra_pmc_readl(PMC_CTRL); - reg |= TEGRA_POWER_CPU_PWRREQ_OE; - tegra_pmc_writel(reg, PMC_CTRL); - - reg = tegra_pmc_readl(PMC_CTRL); - - if (!pmc_pm_data.sysclkreq_high) - reg |= TEGRA_POWER_SYSCLK_POLARITY; - else - reg &= ~TEGRA_POWER_SYSCLK_POLARITY; - - /* configure the output polarity while the request is tristated */ - tegra_pmc_writel(reg, PMC_CTRL); - - /* now enable the request */ - reg |= TEGRA_POWER_SYSCLK_OE; - tegra_pmc_writel(reg, PMC_CTRL); -} -#endif - -static const struct of_device_id matches[] __initconst = { - { .compatible = "nvidia,tegra124-pmc" }, - { .compatible = "nvidia,tegra114-pmc" }, - { .compatible = "nvidia,tegra30-pmc" }, - { .compatible = "nvidia,tegra20-pmc" }, - { } -}; - -void __init tegra_pmc_init_irq(void) -{ - struct device_node *np; - u32 val; - - 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"); - - 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); -} - -void __init tegra_pmc_init(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_pclk = of_clk_get_by_name(np, "pclk"); - WARN_ON(IS_ERR(tegra_pclk)); - - /* 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; - } - } - suspend_mode = tegra_pm_validate_suspend_mode(suspend_mode); - - 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; -} diff --git a/arch/arm/mach-tegra/pmc.h b/arch/arm/mach-tegra/pmc.h deleted file mode 100644 index 59e19c34..0000000 --- a/arch/arm/mach-tegra/pmc.h +++ /dev/null @@ -1,49 +0,0 @@ -/* - * Copyright (C) 2012 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/>. - * - */ - -#ifndef __MACH_TEGRA_PMC_H -#define __MACH_TEGRA_PMC_H - -#include <linux/reboot.h> - -enum tegra_suspend_mode { - TEGRA_SUSPEND_NONE = 0, - TEGRA_SUSPEND_LP2, /* CPU voltage off */ - TEGRA_SUSPEND_LP1, /* CPU voltage off, DRAM self-refresh */ - TEGRA_SUSPEND_LP0, /* CPU + core voltage off, DRAM self-refresh */ - TEGRA_MAX_SUSPEND_MODE, -}; - -#ifdef CONFIG_PM_SLEEP -enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void); -void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode); -void tegra_pmc_suspend(void); -void tegra_pmc_resume(void); -void tegra_pmc_pm_set(enum tegra_suspend_mode mode); -void tegra_pmc_suspend_init(void); -#endif - -bool tegra_pmc_cpu_is_powered(int cpuid); -int tegra_pmc_cpu_power_on(int cpuid); -int tegra_pmc_cpu_remove_clamping(int cpuid); - -void tegra_pmc_restart(enum reboot_mode mode, const char *cmd); - -void tegra_pmc_init_irq(void); -void tegra_pmc_init(void); - -#endif diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c deleted file mode 100644 index 0a14b86..0000000 --- a/arch/arm/mach-tegra/powergate.c +++ /dev/null @@ -1,516 +0,0 @@ -/* - * drivers/powergate/tegra-powergate.c - * - * Copyright (c) 2010 Google, Inc - * - * Author: - * Colin Cross <ccross@google.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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 <linux/clk.h> -#include <linux/clk/tegra.h> -#include <linux/debugfs.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/export.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/reset.h> -#include <linux/seq_file.h> -#include <linux/spinlock.h> - -#include <soc/tegra/fuse.h> -#include <soc/tegra/powergate.h> - -#include "iomap.h" - -#define DPD_SAMPLE 0x020 -#define DPD_SAMPLE_ENABLE (1 << 0) -#define DPD_SAMPLE_DISABLE (0 << 0) - -#define PWRGATE_TOGGLE 0x30 -#define PWRGATE_TOGGLE_START (1 << 8) - -#define REMOVE_CLAMPING 0x34 - -#define PWRGATE_STATUS 0x38 - -#define IO_DPD_REQ 0x1b8 -#define IO_DPD_REQ_CODE_IDLE (0 << 30) -#define IO_DPD_REQ_CODE_OFF (1 << 30) -#define IO_DPD_REQ_CODE_ON (2 << 30) -#define IO_DPD_REQ_CODE_MASK (3 << 30) - -#define IO_DPD_STATUS 0x1bc -#define IO_DPD2_REQ 0x1c0 -#define IO_DPD2_STATUS 0x1c4 -#define SEL_DPD_TIM 0x1c8 - -#define GPU_RG_CNTRL 0x2d4 - -static int tegra_num_powerdomains; -static int tegra_num_cpu_domains; -static const u8 *tegra_cpu_domains; - -static const u8 tegra30_cpu_domains[] = { - TEGRA_POWERGATE_CPU, - TEGRA_POWERGATE_CPU1, - TEGRA_POWERGATE_CPU2, - TEGRA_POWERGATE_CPU3, -}; - -static const u8 tegra114_cpu_domains[] = { - TEGRA_POWERGATE_CPU0, - TEGRA_POWERGATE_CPU1, - TEGRA_POWERGATE_CPU2, - TEGRA_POWERGATE_CPU3, -}; - -static const u8 tegra124_cpu_domains[] = { - TEGRA_POWERGATE_CPU0, - TEGRA_POWERGATE_CPU1, - TEGRA_POWERGATE_CPU2, - TEGRA_POWERGATE_CPU3, -}; - -static DEFINE_SPINLOCK(tegra_powergate_lock); - -static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE); - -static u32 pmc_read(unsigned long reg) -{ - return readl(pmc + reg); -} - -static void pmc_write(u32 val, unsigned long reg) -{ - writel(val, pmc + reg); -} - -static int tegra_powergate_set(int id, bool new_state) -{ - bool status; - unsigned long flags; - - spin_lock_irqsave(&tegra_powergate_lock, flags); - - status = pmc_read(PWRGATE_STATUS) & (1 << id); - - if (status == new_state) { - spin_unlock_irqrestore(&tegra_powergate_lock, flags); - return 0; - } - - pmc_write(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE); - - spin_unlock_irqrestore(&tegra_powergate_lock, flags); - - return 0; -} - -int tegra_powergate_power_on(int id) -{ - if (id < 0 || id >= tegra_num_powerdomains) - return -EINVAL; - - return tegra_powergate_set(id, true); -} - -int tegra_powergate_power_off(int id) -{ - if (id < 0 || id >= tegra_num_powerdomains) - return -EINVAL; - - return tegra_powergate_set(id, false); -} -EXPORT_SYMBOL(tegra_powergate_power_off); - -int tegra_powergate_is_powered(int id) -{ - u32 status; - - if (id < 0 || id >= tegra_num_powerdomains) - return -EINVAL; - - status = pmc_read(PWRGATE_STATUS) & (1 << id); - return !!status; -} - -int tegra_powergate_remove_clamping(int id) -{ - u32 mask; - - if (id < 0 || id >= tegra_num_powerdomains) - return -EINVAL; - - /* - * The Tegra124 GPU has a separate register (with different semantics) - * to remove clamps. - */ - if (tegra_get_chip_id() == TEGRA124) { - if (id == TEGRA_POWERGATE_3D) { - pmc_write(0, GPU_RG_CNTRL); - return 0; - } - } - - /* - * Tegra 2 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); - - pmc_write(mask, REMOVE_CLAMPING); - - return 0; -} -EXPORT_SYMBOL(tegra_powergate_remove_clamping); - -/* Must be called with clk disabled, and returns with clk enabled */ -int tegra_powergate_sequence_power_up(int id, struct clk *clk, - struct reset_control *rst) -{ - int ret; - - reset_control_assert(rst); - - ret = tegra_powergate_power_on(id); - if (ret) - goto err_power; - - ret = clk_prepare_enable(clk); - if (ret) - goto err_clk; - - udelay(10); - - ret = tegra_powergate_remove_clamping(id); - if (ret) - goto err_clamp; - - udelay(10); - reset_control_deassert(rst); - - return 0; - -err_clamp: - clk_disable_unprepare(clk); -err_clk: - tegra_powergate_power_off(id); -err_power: - return ret; -} -EXPORT_SYMBOL(tegra_powergate_sequence_power_up); - -int tegra_cpu_powergate_id(int cpuid) -{ - if (cpuid > 0 && cpuid < tegra_num_cpu_domains) - return tegra_cpu_domains[cpuid]; - - return -EINVAL; -} - -int __init tegra_powergate_init(void) -{ - switch (tegra_get_chip_id()) { - case TEGRA20: - tegra_num_powerdomains = 7; - break; - case TEGRA30: - tegra_num_powerdomains = 14; - tegra_num_cpu_domains = 4; - tegra_cpu_domains = tegra30_cpu_domains; - break; - case TEGRA114: - tegra_num_powerdomains = 23; - tegra_num_cpu_domains = 4; - tegra_cpu_domains = tegra114_cpu_domains; - break; - case TEGRA124: - tegra_num_powerdomains = 25; - tegra_num_cpu_domains = 4; - tegra_cpu_domains = tegra124_cpu_domains; - break; - default: - /* Unknown Tegra variant. Disable powergating */ - tegra_num_powerdomains = 0; - break; - } - - return 0; -} - -#ifdef CONFIG_DEBUG_FS - -static const char * const *powergate_name; - -static const char * const powergate_name_t20[] = { - [TEGRA_POWERGATE_CPU] = "cpu", - [TEGRA_POWERGATE_3D] = "3d", - [TEGRA_POWERGATE_VENC] = "venc", - [TEGRA_POWERGATE_VDEC] = "vdec", - [TEGRA_POWERGATE_PCIE] = "pcie", - [TEGRA_POWERGATE_L2] = "l2", - [TEGRA_POWERGATE_MPE] = "mpe", -}; - -static const char * const powergate_name_t30[] = { - [TEGRA_POWERGATE_CPU] = "cpu0", - [TEGRA_POWERGATE_3D] = "3d0", - [TEGRA_POWERGATE_VENC] = "venc", - [TEGRA_POWERGATE_VDEC] = "vdec", - [TEGRA_POWERGATE_PCIE] = "pcie", - [TEGRA_POWERGATE_L2] = "l2", - [TEGRA_POWERGATE_MPE] = "mpe", - [TEGRA_POWERGATE_HEG] = "heg", - [TEGRA_POWERGATE_SATA] = "sata", - [TEGRA_POWERGATE_CPU1] = "cpu1", - [TEGRA_POWERGATE_CPU2] = "cpu2", - [TEGRA_POWERGATE_CPU3] = "cpu3", - [TEGRA_POWERGATE_CELP] = "celp", - [TEGRA_POWERGATE_3D1] = "3d1", -}; - -static const char * const powergate_name_t114[] = { - [TEGRA_POWERGATE_CPU] = "crail", - [TEGRA_POWERGATE_3D] = "3d", - [TEGRA_POWERGATE_VENC] = "venc", - [TEGRA_POWERGATE_VDEC] = "vdec", - [TEGRA_POWERGATE_MPE] = "mpe", - [TEGRA_POWERGATE_HEG] = "heg", - [TEGRA_POWERGATE_CPU1] = "cpu1", - [TEGRA_POWERGATE_CPU2] = "cpu2", - [TEGRA_POWERGATE_CPU3] = "cpu3", - [TEGRA_POWERGATE_CELP] = "celp", - [TEGRA_POWERGATE_CPU0] = "cpu0", - [TEGRA_POWERGATE_C0NC] = "c0nc", - [TEGRA_POWERGATE_C1NC] = "c1nc", - [TEGRA_POWERGATE_DIS] = "dis", - [TEGRA_POWERGATE_DISB] = "disb", - [TEGRA_POWERGATE_XUSBA] = "xusba", - [TEGRA_POWERGATE_XUSBB] = "xusbb", - [TEGRA_POWERGATE_XUSBC] = "xusbc", -}; - -static const char * const powergate_name_t124[] = { - [TEGRA_POWERGATE_CPU] = "crail", - [TEGRA_POWERGATE_3D] = "3d", - [TEGRA_POWERGATE_VENC] = "venc", - [TEGRA_POWERGATE_PCIE] = "pcie", - [TEGRA_POWERGATE_VDEC] = "vdec", - [TEGRA_POWERGATE_L2] = "l2", - [TEGRA_POWERGATE_MPE] = "mpe", - [TEGRA_POWERGATE_HEG] = "heg", - [TEGRA_POWERGATE_SATA] = "sata", - [TEGRA_POWERGATE_CPU1] = "cpu1", - [TEGRA_POWERGATE_CPU2] = "cpu2", - [TEGRA_POWERGATE_CPU3] = "cpu3", - [TEGRA_POWERGATE_CELP] = "celp", - [TEGRA_POWERGATE_CPU0] = "cpu0", - [TEGRA_POWERGATE_C0NC] = "c0nc", - [TEGRA_POWERGATE_C1NC] = "c1nc", - [TEGRA_POWERGATE_SOR] = "sor", - [TEGRA_POWERGATE_DIS] = "dis", - [TEGRA_POWERGATE_DISB] = "disb", - [TEGRA_POWERGATE_XUSBA] = "xusba", - [TEGRA_POWERGATE_XUSBB] = "xusbb", - [TEGRA_POWERGATE_XUSBC] = "xusbc", - [TEGRA_POWERGATE_VIC] = "vic", - [TEGRA_POWERGATE_IRAM] = "iram", -}; - -static int powergate_show(struct seq_file *s, void *data) -{ - int i; - - seq_printf(s, " powergate powered\n"); - seq_printf(s, "------------------\n"); - - for (i = 0; i < tegra_num_powerdomains; i++) { - if (!powergate_name[i]) - continue; - - seq_printf(s, " %9s %7s\n", powergate_name[i], - tegra_powergate_is_powered(i) ? "yes" : "no"); - } - - return 0; -} - -static int powergate_open(struct inode *inode, struct file *file) -{ - return single_open(file, powergate_show, inode->i_private); -} - -static const struct file_operations powergate_fops = { - .open = powergate_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -int __init tegra_powergate_debugfs_init(void) -{ - struct dentry *d; - - switch (tegra_get_chip_id()) { - case TEGRA20: - powergate_name = powergate_name_t20; - break; - case TEGRA30: - powergate_name = powergate_name_t30; - break; - case TEGRA114: - powergate_name = powergate_name_t114; - break; - case TEGRA124: - powergate_name = powergate_name_t124; - break; - } - - if (powergate_name) { - d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL, - &powergate_fops); - if (!d) - return -ENOMEM; - } - - return 0; -} - -#endif - -static int tegra_io_rail_prepare(int id, unsigned long *request, - unsigned long *status, unsigned int *bit) -{ - unsigned long rate, value; - struct clk *clk; - - *bit = id % 32; - - /* - * There are two sets of 30 bits to select IO rails, but bits 30 and - * 31 are control bits rather than IO rail selection bits. - */ - if (id > 63 || *bit == 30 || *bit == 31) - return -EINVAL; - - if (id < 32) { - *status = IO_DPD_STATUS; - *request = IO_DPD_REQ; - } else { - *status = IO_DPD2_STATUS; - *request = IO_DPD2_REQ; - } - - clk = clk_get_sys(NULL, "pclk"); - if (IS_ERR(clk)) - return PTR_ERR(clk); - - rate = clk_get_rate(clk); - clk_put(clk); - - pmc_write(DPD_SAMPLE_ENABLE, DPD_SAMPLE); - - /* must be at least 200 ns, in APB (PCLK) clock cycles */ - value = DIV_ROUND_UP(1000000000, rate); - value = DIV_ROUND_UP(200, value); - pmc_write(value, SEL_DPD_TIM); - - return 0; -} - -static int tegra_io_rail_poll(unsigned long offset, unsigned long mask, - unsigned long val, unsigned long timeout) -{ - unsigned long value; - - timeout = jiffies + msecs_to_jiffies(timeout); - - while (time_after(timeout, jiffies)) { - value = pmc_read(offset); - if ((value & mask) == val) - return 0; - - usleep_range(250, 1000); - } - - return -ETIMEDOUT; -} - -static void tegra_io_rail_unprepare(void) -{ - pmc_write(DPD_SAMPLE_DISABLE, DPD_SAMPLE); -} - -int tegra_io_rail_power_on(int id) -{ - unsigned long request, status, value; - unsigned int bit, mask; - int err; - - err = tegra_io_rail_prepare(id, &request, &status, &bit); - if (err < 0) - return err; - - mask = 1 << bit; - - value = pmc_read(request); - value |= mask; - value &= ~IO_DPD_REQ_CODE_MASK; - value |= IO_DPD_REQ_CODE_OFF; - pmc_write(value, request); - - err = tegra_io_rail_poll(status, mask, 0, 250); - if (err < 0) - return err; - - tegra_io_rail_unprepare(); - - return 0; -} -EXPORT_SYMBOL(tegra_io_rail_power_on); - -int tegra_io_rail_power_off(int id) -{ - unsigned long request, status, value; - unsigned int bit, mask; - int err; - - err = tegra_io_rail_prepare(id, &request, &status, &bit); - if (err < 0) - return err; - - mask = 1 << bit; - - value = pmc_read(request); - value |= mask; - value &= ~IO_DPD_REQ_CODE_MASK; - value |= IO_DPD_REQ_CODE_ON; - pmc_write(value, request); - - err = tegra_io_rail_poll(status, mask, mask, 250); - if (err < 0) - return err; - - tegra_io_rail_unprepare(); - - return 0; -} -EXPORT_SYMBOL(tegra_io_rail_power_off); diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c index c9176db..5ef5173 100644 --- a/arch/arm/mach-tegra/tegra.c +++ b/arch/arm/mach-tegra/tegra.c @@ -36,6 +36,7 @@ #include <linux/usb/tegra_usb_phy.h> #include <soc/tegra/fuse.h> +#include <soc/tegra/pmc.h> #include <asm/hardware/cache-l2x0.h> #include <asm/mach/arch.h> @@ -49,7 +50,6 @@ #include "cpuidle.h" #include "iomap.h" #include "irq.h" -#include "pmc.h" #include "pm.h" #include "reset.h" #include "sleep.h" @@ -74,12 +74,10 @@ static void __init tegra_init_early(void) { of_register_trusted_foundations(); tegra_cpu_reset_handler_init(); - tegra_powergate_init(); } static void __init tegra_dt_init_irq(void) { - tegra_pmc_init_irq(); tegra_init_irq(); irqchip_init(); tegra_legacy_irq_syscore_init(); @@ -91,8 +89,6 @@ static void __init tegra_dt_init(void) struct soc_device *soc_dev; struct device *parent = NULL; - tegra_pmc_init(); - tegra_clocks_apply_init_table(); soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); @@ -142,7 +138,6 @@ static void __init tegra_dt_init_late(void) tegra_init_suspend(); tegra_cpuidle_init(); - tegra_powergate_debugfs_init(); for (i = 0; i < ARRAY_SIZE(board_init_funcs); i++) { if (of_machine_is_compatible(board_init_funcs[i].machine)) { |
