958 lines
22 KiB
C
958 lines
22 KiB
C
|
/*
|
||
|
|
* drivers/soc/tegra/pmc.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/kernel.h>
|
||
|
|
#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/of.h>
|
||
|
|
#include <linux/of_address.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/reboot.h>
|
||
|
|
#include <linux/reset.h>
|
||
|
|
#include <linux/seq_file.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
|
||
|
|
#include <soc/tegra/common.h>
|
||
|
|
#include <soc/tegra/fuse.h>
|
||
|
|
#include <soc/tegra/pmc.h>
|
||
|
|
|
||
|
|
#define PMC_CNTRL 0x0
|
||
|
|
#define PMC_CNTRL_SYSCLK_POLARITY (1 << 10) /* sys clk polarity */
|
||
|
|
#define PMC_CNTRL_SYSCLK_OE (1 << 11) /* system clock enable */
|
||
|
|
#define PMC_CNTRL_SIDE_EFFECT_LP0 (1 << 14) /* LP0 when CPU pwr gated */
|
||
|
|
#define PMC_CNTRL_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */
|
||
|
|
#define PMC_CNTRL_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
|
||
|
|
#define PMC_CNTRL_INTR_POLARITY (1 << 17) /* inverts INTR polarity */
|
||
|
|
|
||
|
|
#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 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
|
||
|
|
|
||
|
|
#define PMC_SCRATCH41 0x140
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
struct tegra_pmc_soc {
|
||
|
|
unsigned int num_powergates;
|
||
|
|
const char *const *powergates;
|
||
|
|
unsigned int num_cpu_powergates;
|
||
|
|
const u8 *cpu_powergates;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct tegra_pmc - NVIDIA Tegra PMC
|
||
|
|
* @base: pointer to I/O remapped register region
|
||
|
|
* @clk: pointer to pclk clock
|
||
|
|
* @rate: currently configured rate of pclk
|
||
|
|
* @suspend_mode: lowest suspend mode available
|
||
|
|
* @cpu_good_time: CPU power good time (in microseconds)
|
||
|
|
* @cpu_off_time: CPU power off time (in microsecends)
|
||
|
|
* @core_osc_time: core power good OSC time (in microseconds)
|
||
|
|
* @core_pmu_time: core power good PMU time (in microseconds)
|
||
|
|
* @core_off_time: core power off time (in microseconds)
|
||
|
|
* @corereq_high: core power request is active-high
|
||
|
|
* @sysclkreq_high: system clock request is active-high
|
||
|
|
* @combined_req: combined power request for CPU & core
|
||
|
|
* @cpu_pwr_good_en: CPU power good signal is enabled
|
||
|
|
* @lp0_vec_phys: physical base address of the LP0 warm boot code
|
||
|
|
* @lp0_vec_size: size of the LP0 warm boot code
|
||
|
|
* @powergates_lock: mutex for power gate register access
|
||
|
|
*/
|
||
|
|
struct tegra_pmc {
|
||
|
|
void __iomem *base;
|
||
|
|
struct clk *clk;
|
||
|
|
|
||
|
|
const struct tegra_pmc_soc *soc;
|
||
|
|
|
||
|
|
unsigned long rate;
|
||
|
|
|
||
|
|
enum tegra_suspend_mode suspend_mode;
|
||
|
|
u32 cpu_good_time;
|
||
|
|
u32 cpu_off_time;
|
||
|
|
u32 core_osc_time;
|
||
|
|
u32 core_pmu_time;
|
||
|
|
u32 core_off_time;
|
||
|
|
bool corereq_high;
|
||
|
|
bool sysclkreq_high;
|
||
|
|
bool combined_req;
|
||
|
|
bool cpu_pwr_good_en;
|
||
|
|
u32 lp0_vec_phys;
|
||
|
|
u32 lp0_vec_size;
|
||
|
|
|
||
|
|
struct mutex powergates_lock;
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct tegra_pmc *pmc = &(struct tegra_pmc) {
|
||
|
|
.base = NULL,
|
||
|
|
.suspend_mode = TEGRA_SUSPEND_NONE,
|
||
|
|
};
|
||
|
|
|
||
|
|
static u32 tegra_pmc_readl(unsigned long offset)
|
||
|
|
{
|
||
|
|
return readl(pmc->base + offset);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void tegra_pmc_writel(u32 value, unsigned long offset)
|
||
|
|
{
|
||
|
|
writel(value, pmc->base + offset);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_powergate_set() - set the state of a partition
|
||
|
|
* @id: partition ID
|
||
|
|
* @new_state: new state of the partition
|
||
|
|
*/
|
||
|
|
static int tegra_powergate_set(int id, bool new_state)
|
||
|
|
{
|
||
|
|
bool status;
|
||
|
|
|
||
|
|
mutex_lock(&pmc->powergates_lock);
|
||
|
|
|
||
|
|
status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
|
||
|
|
|
||
|
|
if (status == new_state) {
|
||
|
|
mutex_unlock(&pmc->powergates_lock);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
|
||
|
|
|
||
|
|
mutex_unlock(&pmc->powergates_lock);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_powergate_power_on() - power on partition
|
||
|
|
* @id: partition ID
|
||
|
|
*/
|
||
|
|
int tegra_powergate_power_on(int id)
|
||
|
|
{
|
||
|
|
if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return tegra_powergate_set(id, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_powergate_power_off() - power off partition
|
||
|
|
* @id: partition ID
|
||
|
|
*/
|
||
|
|
int tegra_powergate_power_off(int id)
|
||
|
|
{
|
||
|
|
if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return tegra_powergate_set(id, false);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(tegra_powergate_power_off);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_powergate_is_powered() - check if partition is powered
|
||
|
|
* @id: partition ID
|
||
|
|
*/
|
||
|
|
int tegra_powergate_is_powered(int id)
|
||
|
|
{
|
||
|
|
u32 status;
|
||
|
|
|
||
|
|
if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
|
||
|
|
return !!status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_powergate_remove_clamping() - remove power clamps for partition
|
||
|
|
* @id: partition ID
|
||
|
|
*/
|
||
|
|
int tegra_powergate_remove_clamping(int id)
|
||
|
|
{
|
||
|
|
u32 mask;
|
||
|
|
|
||
|
|
if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
|
||
|
|
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) {
|
||
|
|
tegra_pmc_writel(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);
|
||
|
|
|
||
|
|
tegra_pmc_writel(mask, REMOVE_CLAMPING);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(tegra_powergate_remove_clamping);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_powergate_sequence_power_up() - power up partition
|
||
|
|
* @id: partition ID
|
||
|
|
* @clk: clock for partition
|
||
|
|
* @rst: reset for partition
|
||
|
|
*
|
||
|
|
* 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;
|
||
|
|
|
||
|
|
usleep_range(10, 20);
|
||
|
|
|
||
|
|
ret = tegra_powergate_remove_clamping(id);
|
||
|
|
if (ret)
|
||
|
|
goto err_clamp;
|
||
|
|
|
||
|
|
usleep_range(10, 20);
|
||
|
|
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);
|
||
|
|
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
/**
|
||
|
|
* tegra_get_cpu_powergate_id() - convert from CPU ID to partition ID
|
||
|
|
* @cpuid: CPU partition ID
|
||
|
|
*
|
||
|
|
* Returns the partition ID corresponding to the CPU partition ID or a
|
||
|
|
* negative error code on failure.
|
||
|
|
*/
|
||
|
|
static int tegra_get_cpu_powergate_id(int cpuid)
|
||
|
|
{
|
||
|
|
if (pmc->soc && cpuid > 0 && cpuid < pmc->soc->num_cpu_powergates)
|
||
|
|
return pmc->soc->cpu_powergates[cpuid];
|
||
|
|
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_pmc_cpu_is_powered() - check if CPU partition is powered
|
||
|
|
* @cpuid: CPU partition ID
|
||
|
|
*/
|
||
|
|
bool tegra_pmc_cpu_is_powered(int cpuid)
|
||
|
|
{
|
||
|
|
int id;
|
||
|
|
|
||
|
|
id = tegra_get_cpu_powergate_id(cpuid);
|
||
|
|
if (id < 0)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return tegra_powergate_is_powered(id);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_pmc_cpu_power_on() - power on CPU partition
|
||
|
|
* @cpuid: CPU partition ID
|
||
|
|
*/
|
||
|
|
int tegra_pmc_cpu_power_on(int cpuid)
|
||
|
|
{
|
||
|
|
int id;
|
||
|
|
|
||
|
|
id = tegra_get_cpu_powergate_id(cpuid);
|
||
|
|
if (id < 0)
|
||
|
|
return id;
|
||
|
|
|
||
|
|
return tegra_powergate_set(id, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
|
||
|
|
* @cpuid: CPU partition ID
|
||
|
|
*/
|
||
|
|
int tegra_pmc_cpu_remove_clamping(int cpuid)
|
||
|
|
{
|
||
|
|
int id;
|
||
|
|
|
||
|
|
id = tegra_get_cpu_powergate_id(cpuid);
|
||
|
|
if (id < 0)
|
||
|
|
return id;
|
||
|
|
|
||
|
|
return tegra_powergate_remove_clamping(id);
|
||
|
|
}
|
||
|
|
#endif /* CONFIG_SMP */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* tegra_pmc_restart() - reboot the system
|
||
|
|
* @mode: which mode to reboot in
|
||
|
|
* @cmd: reboot command
|
||
|
|
*/
|
||
|
|
void tegra_pmc_restart(enum reboot_mode mode, const char *cmd)
|
||
|
|
{
|
||
|
|
u32 value;
|
||
|
|
|
||
|
|
value = tegra_pmc_readl(PMC_SCRATCH0);
|
||
|
|
value &= ~PMC_SCRATCH0_MODE_MASK;
|
||
|
|
|
||
|
|
if (cmd) {
|
||
|
|
if (strcmp(cmd, "recovery") == 0)
|
||
|
|
value |= PMC_SCRATCH0_MODE_RECOVERY;
|
||
|
|
|
||
|
|
if (strcmp(cmd, "bootloader") == 0)
|
||
|
|
value |= PMC_SCRATCH0_MODE_BOOTLOADER;
|
||
|
|
|
||
|
|
if (strcmp(cmd, "forced-recovery") == 0)
|
||
|
|
value |= PMC_SCRATCH0_MODE_RCM;
|
||
|
|
}
|
||
|
|
|
||
|
|
tegra_pmc_writel(value, PMC_SCRATCH0);
|
||
|
|
|
||
|
|
value = tegra_pmc_readl(0);
|
||
|
|
value |= 0x10;
|
||
|
|
tegra_pmc_writel(value, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int powergate_show(struct seq_file *s, void *data)
|
||
|
|
{
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
seq_printf(s, " powergate powered\n");
|
||
|
|
seq_printf(s, "------------------\n");
|
||
|
|
|
||
|
|
for (i = 0; i < pmc->soc->num_powergates; i++) {
|
||
|
|
if (!pmc->soc->powergates[i])
|
||
|
|
continue;
|
||
|
|
|
||
|
|
seq_printf(s, " %9s %7s\n", pmc->soc->powergates[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,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int tegra_powergate_debugfs_init(void)
|
||
|
|
{
|
||
|
|
struct dentry *d;
|
||
|
|
|
||
|
|
d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
|
||
|
|
&powergate_fops);
|
||
|
|
if (!d)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
tegra_pmc_writel(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);
|
||
|
|
tegra_pmc_writel(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 = tegra_pmc_readl(offset);
|
||
|
|
if ((value & mask) == val)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
usleep_range(250, 1000);
|
||
|
|
}
|
||
|
|
|
||
|
|
return -ETIMEDOUT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void tegra_io_rail_unprepare(void)
|
||
|
|
{
|
||
|
|
tegra_pmc_writel(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 = tegra_pmc_readl(request);
|
||
|
|
value |= mask;
|
||
|
|
value &= ~IO_DPD_REQ_CODE_MASK;
|
||
|
|
value |= IO_DPD_REQ_CODE_OFF;
|
||
|
|
tegra_pmc_writel(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 = tegra_pmc_readl(request);
|
||
|
|
value |= mask;
|
||
|
|
value &= ~IO_DPD_REQ_CODE_MASK;
|
||
|
|
value |= IO_DPD_REQ_CODE_ON;
|
||
|
|
tegra_pmc_writel(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);
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM_SLEEP
|
||
|
|
enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
|
||
|
|
{
|
||
|
|
return pmc->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->suspend_mode = mode;
|
||
|
|
}
|
||
|
|
|
||
|
|
void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode)
|
||
|
|
{
|
||
|
|
unsigned long long rate = 0;
|
||
|
|
u32 value;
|
||
|
|
|
||
|
|
switch (mode) {
|
||
|
|
case TEGRA_SUSPEND_LP1:
|
||
|
|
rate = 32768;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case TEGRA_SUSPEND_LP2:
|
||
|
|
rate = clk_get_rate(pmc->clk);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (WARN_ON_ONCE(rate == 0))
|
||
|
|
rate = 100000000;
|
||
|
|
|
||
|
|
if (rate != pmc->rate) {
|
||
|
|
u64 ticks;
|
||
|
|
|
||
|
|
ticks = pmc->cpu_good_time * rate + USEC_PER_SEC - 1;
|
||
|
|
do_div(ticks, USEC_PER_SEC);
|
||
|
|
tegra_pmc_writel(ticks, PMC_CPUPWRGOOD_TIMER);
|
||
|
|
|
||
|
|
ticks = pmc->cpu_off_time * rate + USEC_PER_SEC - 1;
|
||
|
|
do_div(ticks, USEC_PER_SEC);
|
||
|
|
tegra_pmc_writel(ticks, PMC_CPUPWROFF_TIMER);
|
||
|
|
|
||
|
|
wmb();
|
||
|
|
|
||
|
|
pmc->rate = rate;
|
||
|
|
}
|
||
|
|
|
||
|
|
value = tegra_pmc_readl(PMC_CNTRL);
|
||
|
|
value &= ~PMC_CNTRL_SIDE_EFFECT_LP0;
|
||
|
|
value |= PMC_CNTRL_CPU_PWRREQ_OE;
|
||
|
|
tegra_pmc_writel(value, PMC_CNTRL);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
|
||
|
|
{
|
||
|
|
u32 value, values[2];
|
||
|
|
|
||
|
|
if (of_property_read_u32(np, "nvidia,suspend-mode", &value)) {
|
||
|
|
} else {
|
||
|
|
switch (value) {
|
||
|
|
case 0:
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_LP0;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 1:
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_LP1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case 2:
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_LP2;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_NONE;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pmc->suspend_mode = tegra_pm_validate_suspend_mode(pmc->suspend_mode);
|
||
|
|
|
||
|
|
if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &value))
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_NONE;
|
||
|
|
|
||
|
|
pmc->cpu_good_time = value;
|
||
|
|
|
||
|
|
if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &value))
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_NONE;
|
||
|
|
|
||
|
|
pmc->cpu_off_time = value;
|
||
|
|
|
||
|
|
if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
|
||
|
|
values, ARRAY_SIZE(values)))
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_NONE;
|
||
|
|
|
||
|
|
pmc->core_osc_time = values[0];
|
||
|
|
pmc->core_pmu_time = values[1];
|
||
|
|
|
||
|
|
if (of_property_read_u32(np, "nvidia,core-pwr-off-time", &value))
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_NONE;
|
||
|
|
|
||
|
|
pmc->core_off_time = value;
|
||
|
|
|
||
|
|
pmc->corereq_high = of_property_read_bool(np,
|
||
|
|
"nvidia,core-power-req-active-high");
|
||
|
|
|
||
|
|
pmc->sysclkreq_high = of_property_read_bool(np,
|
||
|
|
"nvidia,sys-clock-req-active-high");
|
||
|
|
|
||
|
|
pmc->combined_req = of_property_read_bool(np,
|
||
|
|
"nvidia,combined-power-req");
|
||
|
|
|
||
|
|
pmc->cpu_pwr_good_en = of_property_read_bool(np,
|
||
|
|
"nvidia,cpu-pwr-good-en");
|
||
|
|
|
||
|
|
if (of_property_read_u32_array(np, "nvidia,lp0-vec", values,
|
||
|
|
ARRAY_SIZE(values)))
|
||
|
|
if (pmc->suspend_mode == TEGRA_SUSPEND_LP0)
|
||
|
|
pmc->suspend_mode = TEGRA_SUSPEND_LP1;
|
||
|
|
|
||
|
|
pmc->lp0_vec_phys = values[0];
|
||
|
|
pmc->lp0_vec_size = values[1];
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void tegra_pmc_init(struct tegra_pmc *pmc)
|
||
|
|
{
|
||
|
|
u32 value;
|
||
|
|
|
||
|
|
/* Always enable CPU power request */
|
||
|
|
value = tegra_pmc_readl(PMC_CNTRL);
|
||
|
|
value |= PMC_CNTRL_CPU_PWRREQ_OE;
|
||
|
|
tegra_pmc_writel(value, PMC_CNTRL);
|
||
|
|
|
||
|
|
value = tegra_pmc_readl(PMC_CNTRL);
|
||
|
|
|
||
|
|
if (pmc->sysclkreq_high)
|
||
|
|
value &= ~PMC_CNTRL_SYSCLK_POLARITY;
|
||
|
|
else
|
||
|
|
value |= PMC_CNTRL_SYSCLK_POLARITY;
|
||
|
|
|
||
|
|
/* configure the output polarity while the request is tristated */
|
||
|
|
tegra_pmc_writel(value, PMC_CNTRL);
|
||
|
|
|
||
|
|
/* now enable the request */
|
||
|
|
value = tegra_pmc_readl(PMC_CNTRL);
|
||
|
|
value |= PMC_CNTRL_SYSCLK_OE;
|
||
|
|
tegra_pmc_writel(value, PMC_CNTRL);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tegra_pmc_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
void __iomem *base = pmc->base;
|
||
|
|
struct resource *res;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = tegra_pmc_parse_dt(pmc, pdev->dev.of_node);
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
/* take over the memory region from the early initialization */
|
||
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||
|
|
pmc->base = devm_ioremap_resource(&pdev->dev, res);
|
||
|
|
if (IS_ERR(pmc->base))
|
||
|
|
return PTR_ERR(pmc->base);
|
||
|
|
|
||
|
|
iounmap(base);
|
||
|
|
|
||
|
|
pmc->clk = devm_clk_get(&pdev->dev, "pclk");
|
||
|
|
if (IS_ERR(pmc->clk)) {
|
||
|
|
err = PTR_ERR(pmc->clk);
|
||
|
|
dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
tegra_pmc_init(pmc);
|
||
|
|
|
||
|
|
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
|
||
|
|
err = tegra_powergate_debugfs_init();
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM_SLEEP
|
||
|
|
static int tegra_pmc_suspend(struct device *dev)
|
||
|
|
{
|
||
|
|
tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tegra_pmc_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
tegra_pmc_writel(0x0, PMC_SCRATCH41);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);
|
||
|
|
|
||
|
|
static const char * const tegra20_powergates[] = {
|
||
|
|
[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 struct tegra_pmc_soc tegra20_pmc_soc = {
|
||
|
|
.num_powergates = ARRAY_SIZE(tegra20_powergates),
|
||
|
|
.powergates = tegra20_powergates,
|
||
|
|
.num_cpu_powergates = 0,
|
||
|
|
.cpu_powergates = NULL,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const char * const tegra30_powergates[] = {
|
||
|
|
[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 u8 tegra30_cpu_powergates[] = {
|
||
|
|
TEGRA_POWERGATE_CPU,
|
||
|
|
TEGRA_POWERGATE_CPU1,
|
||
|
|
TEGRA_POWERGATE_CPU2,
|
||
|
|
TEGRA_POWERGATE_CPU3,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct tegra_pmc_soc tegra30_pmc_soc = {
|
||
|
|
.num_powergates = ARRAY_SIZE(tegra30_powergates),
|
||
|
|
.powergates = tegra30_powergates,
|
||
|
|
.num_cpu_powergates = ARRAY_SIZE(tegra30_cpu_powergates),
|
||
|
|
.cpu_powergates = tegra30_cpu_powergates,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const char * const tegra114_powergates[] = {
|
||
|
|
[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 u8 tegra114_cpu_powergates[] = {
|
||
|
|
TEGRA_POWERGATE_CPU0,
|
||
|
|
TEGRA_POWERGATE_CPU1,
|
||
|
|
TEGRA_POWERGATE_CPU2,
|
||
|
|
TEGRA_POWERGATE_CPU3,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct tegra_pmc_soc tegra114_pmc_soc = {
|
||
|
|
.num_powergates = ARRAY_SIZE(tegra114_powergates),
|
||
|
|
.powergates = tegra114_powergates,
|
||
|
|
.num_cpu_powergates = ARRAY_SIZE(tegra114_cpu_powergates),
|
||
|
|
.cpu_powergates = tegra114_cpu_powergates,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const char * const tegra124_powergates[] = {
|
||
|
|
[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 const u8 tegra124_cpu_powergates[] = {
|
||
|
|
TEGRA_POWERGATE_CPU0,
|
||
|
|
TEGRA_POWERGATE_CPU1,
|
||
|
|
TEGRA_POWERGATE_CPU2,
|
||
|
|
TEGRA_POWERGATE_CPU3,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct tegra_pmc_soc tegra124_pmc_soc = {
|
||
|
|
.num_powergates = ARRAY_SIZE(tegra124_powergates),
|
||
|
|
.powergates = tegra124_powergates,
|
||
|
|
.num_cpu_powergates = ARRAY_SIZE(tegra124_cpu_powergates),
|
||
|
|
.cpu_powergates = tegra124_cpu_powergates,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct of_device_id tegra_pmc_match[] = {
|
||
|
|
{ .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
|
||
|
|
{ .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc },
|
||
|
|
{ .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc },
|
||
|
|
{ .compatible = "nvidia,tegra20-pmc", .data = &tegra20_pmc_soc },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_driver tegra_pmc_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "tegra-pmc",
|
||
|
|
.suppress_bind_attrs = true,
|
||
|
|
.of_match_table = tegra_pmc_match,
|
||
|
|
.pm = &tegra_pmc_pm_ops,
|
||
|
|
},
|
||
|
|
.probe = tegra_pmc_probe,
|
||
|
|
};
|
||
|
|
module_platform_driver(tegra_pmc_driver);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Early initialization to allow access to registers in the very early boot
|
||
|
|
* process.
|
||
|
|
*/
|
||
|
|
static int __init tegra_pmc_early_init(void)
|
||
|
|
{
|
||
|
|
const struct of_device_id *match;
|
||
|
|
struct device_node *np;
|
||
|
|
struct resource regs;
|
||
|
|
bool invert;
|
||
|
|
u32 value;
|
||
|
|
|
||
|
|
if (!soc_is_tegra())
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match);
|
||
|
|
if (!np) {
|
||
|
|
pr_warn("PMC device node not found, disabling powergating\n");
|
||
|
|
|
||
|
|
regs.start = 0x7000e400;
|
||
|
|
regs.end = 0x7000e7ff;
|
||
|
|
regs.flags = IORESOURCE_MEM;
|
||
|
|
|
||
|
|
pr_warn("Using memory region %pR\n", ®s);
|
||
|
|
} else {
|
||
|
|
pmc->soc = match->data;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (of_address_to_resource(np, 0, ®s) < 0) {
|
||
|
|
pr_err("failed to get PMC registers\n");
|
||
|
|
return -ENXIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
pmc->base = ioremap_nocache(regs.start, resource_size(®s));
|
||
|
|
if (!pmc->base) {
|
||
|
|
pr_err("failed to map PMC registers\n");
|
||
|
|
return -ENXIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
mutex_init(&pmc->powergates_lock);
|
||
|
|
|
||
|
|
invert = of_property_read_bool(np, "nvidia,invert-interrupt");
|
||
|
|
|
||
|
|
value = tegra_pmc_readl(PMC_CNTRL);
|
||
|
|
|
||
|
|
if (invert)
|
||
|
|
value |= PMC_CNTRL_INTR_POLARITY;
|
||
|
|
else
|
||
|
|
value &= ~PMC_CNTRL_INTR_POLARITY;
|
||
|
|
|
||
|
|
tegra_pmc_writel(value, PMC_CNTRL);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
early_initcall(tegra_pmc_early_init);
|