lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
331b93f41d
linux-kernel-test/arch/arm/mach-omap2/pm-debug.c
Peter 'p2' De Schrijver 331b93f41d OMAP: PM: Add pm-debug counters 
This patch provides the debugfs entries and a function which will be
called by the PM code to register the time spent per domain per
state. Also some new fields are added to the powerdomain struct to
keep the time information.

NOTE: As of v2.6.29, using getnstimeofday() after drivers are
suspended is no longer safe since the timekeeping subsystem is also
suspended as part of the suspend process.  Instead use sched_clock()
which on OMAP returns the 32k SYNC timer in nanoseconds.

Also, do not print out status for meta powerdomains (dpll*)

Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com>
Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-09-02 15:08:24 -07:00

329 lines
7.6 KiB
C
Raw Blame History

/*
* OMAP Power Management debug routines
*
* Copyright (C) 2005 Texas Instruments, Inc.
* Copyright (C) 2006-2008 Nokia Corporation
*
* Written by:
* Richard Woodruff <r-woodruff2@ti.com>
* Tony Lindgren
* Juha Yrjola
* Amit Kucheria <amit.kucheria@nokia.com>
* Igor Stoppa <igor.stoppa@nokia.com>
* Jouni Hogander
*
* Based on pm.c for omap2
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <mach/clock.h>
#include <mach/board.h>
#include <mach/powerdomain.h>
#include <mach/clockdomain.h>
#include "prm.h"
#include "cm.h"
#include "pm.h"
int omap2_pm_debug;
#define DUMP_PRM_MOD_REG(mod, reg) \
regs[reg_count].name = #mod "." #reg; \
regs[reg_count++].val = prm_read_mod_reg(mod, reg)
#define DUMP_CM_MOD_REG(mod, reg) \
regs[reg_count].name = #mod "." #reg; \
regs[reg_count++].val = cm_read_mod_reg(mod, reg)
#define DUMP_PRM_REG(reg) \
regs[reg_count].name = #reg; \
regs[reg_count++].val = __raw_readl(reg)
#define DUMP_CM_REG(reg) \
regs[reg_count].name = #reg; \
regs[reg_count++].val = __raw_readl(reg)
#define DUMP_INTC_REG(reg, off) \
regs[reg_count].name = #reg; \
regs[reg_count++].val = __raw_readl(OMAP2_IO_ADDRESS(0x480fe000 + (off)))
void omap2_pm_dump(int mode, int resume, unsigned int us)
{
struct reg {
const char *name;
u32 val;
} regs[32];
int reg_count = 0, i;
const char *s1 = NULL, *s2 = NULL;
if (!resume) {
#if 0
/* MPU */
DUMP_PRM_MOD_REG(OCP_MOD, OMAP2_PRM_IRQENABLE_MPU_OFFSET);
DUMP_CM_MOD_REG(MPU_MOD, CM_CLKSTCTRL);
DUMP_PRM_MOD_REG(MPU_MOD, PM_PWSTCTRL);
DUMP_PRM_MOD_REG(MPU_MOD, PM_PWSTST);
DUMP_PRM_MOD_REG(MPU_MOD, PM_WKDEP);
#endif
#if 0
/* INTC */
DUMP_INTC_REG(INTC_MIR0, 0x0084);
DUMP_INTC_REG(INTC_MIR1, 0x00a4);
DUMP_INTC_REG(INTC_MIR2, 0x00c4);
#endif
#if 0
DUMP_CM_MOD_REG(CORE_MOD, CM_FCLKEN1);
if (cpu_is_omap24xx()) {
DUMP_CM_MOD_REG(CORE_MOD, OMAP24XX_CM_FCLKEN2);
DUMP_PRM_MOD_REG(OMAP24XX_GR_MOD,
OMAP2_PRCM_CLKEMUL_CTRL_OFFSET);
DUMP_PRM_MOD_REG(OMAP24XX_GR_MOD,
OMAP2_PRCM_CLKSRC_CTRL_OFFSET);
}
DUMP_CM_MOD_REG(WKUP_MOD, CM_FCLKEN);
DUMP_CM_MOD_REG(CORE_MOD, CM_ICLKEN1);
DUMP_CM_MOD_REG(CORE_MOD, CM_ICLKEN2);
DUMP_CM_MOD_REG(WKUP_MOD, CM_ICLKEN);
DUMP_CM_MOD_REG(PLL_MOD, CM_CLKEN);
DUMP_CM_MOD_REG(PLL_MOD, CM_AUTOIDLE);
DUMP_PRM_MOD_REG(CORE_MOD, PM_PWSTST);
#endif
#if 0
/* DSP */
if (cpu_is_omap24xx()) {
DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_FCLKEN);
DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_ICLKEN);
DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_IDLEST);
DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_AUTOIDLE);
DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_CLKSEL);
DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_CLKSTCTRL);
DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, RM_RSTCTRL);
DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, RM_RSTST);
DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, PM_PWSTCTRL);
DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, PM_PWSTST);
}
#endif
} else {
DUMP_PRM_MOD_REG(CORE_MOD, PM_WKST1);
if (cpu_is_omap24xx())
DUMP_PRM_MOD_REG(CORE_MOD, OMAP24XX_PM_WKST2);
DUMP_PRM_MOD_REG(WKUP_MOD, PM_WKST);
DUMP_PRM_MOD_REG(OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET);
#if 1
DUMP_INTC_REG(INTC_PENDING_IRQ0, 0x0098);
DUMP_INTC_REG(INTC_PENDING_IRQ1, 0x00b8);
DUMP_INTC_REG(INTC_PENDING_IRQ2, 0x00d8);
#endif
}
switch (mode) {
case 0:
s1 = "full";
s2 = "retention";
break;
case 1:
s1 = "MPU";
s2 = "retention";
break;
case 2:
s1 = "MPU";
s2 = "idle";
break;
}
if (!resume)
#ifdef CONFIG_NO_HZ
printk(KERN_INFO
"--- Going to %s %s (next timer after %u ms)\n", s1, s2,
jiffies_to_msecs(get_next_timer_interrupt(jiffies) -
jiffies));
#else
printk(KERN_INFO "--- Going to %s %s\n", s1, s2);
#endif
else
printk(KERN_INFO "--- Woke up (slept for %u.%03u ms)\n",
us / 1000, us % 1000);
for (i = 0; i < reg_count; i++)
printk(KERN_INFO "%-20s: 0x%08x\n", regs[i].name, regs[i].val);
}
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
struct dentry *pm_dbg_dir;
static int pm_dbg_init_done;
enum {
DEBUG_FILE_COUNTERS = 0,
DEBUG_FILE_TIMERS,
};
static const char pwrdm_state_names[][4] = {
"OFF",
"RET",
"INA",
"ON"
};
void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
{
s64 t;
if (!pm_dbg_init_done)
return ;
/* Update timer for previous state */
t = sched_clock();
pwrdm->state_timer[prev] += t - pwrdm->timer;
pwrdm->timer = t;
}
static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
{
struct seq_file *s = (struct seq_file *)user;
if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
strcmp(clkdm->name, "wkup_clkdm") == 0 ||
strncmp(clkdm->name, "dpll", 4) == 0)
return 0;
seq_printf(s, "%s->%s (%d)", clkdm->name,
clkdm->pwrdm.ptr->name,
atomic_read(&clkdm->usecount));
seq_printf(s, "\n");
return 0;
}
static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
{
struct seq_file *s = (struct seq_file *)user;
int i;
if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
strncmp(pwrdm->name, "dpll", 4) == 0)
return 0;
if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
seq_printf(s, "%s (%s)", pwrdm->name,
pwrdm_state_names[pwrdm->state]);
for (i = 0; i < 4; i++)
seq_printf(s, ",%s:%d", pwrdm_state_names[i],
pwrdm->state_counter[i]);
seq_printf(s, "\n");
return 0;
}
static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
{
struct seq_file *s = (struct seq_file *)user;
int i;
if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
strncmp(pwrdm->name, "dpll", 4) == 0)
return 0;
pwrdm_state_switch(pwrdm);
seq_printf(s, "%s (%s)", pwrdm->name,
pwrdm_state_names[pwrdm->state]);
for (i = 0; i < 4; i++)
seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
pwrdm->state_timer[i]);
seq_printf(s, "\n");
return 0;
}
static int pm_dbg_show_counters(struct seq_file *s, void *unused)
{
pwrdm_for_each(pwrdm_dbg_show_counter, s);
clkdm_for_each(clkdm_dbg_show_counter, s);
return 0;
}
static int pm_dbg_show_timers(struct seq_file *s, void *unused)
{
pwrdm_for_each(pwrdm_dbg_show_timer, s);
return 0;
}
static int pm_dbg_open(struct inode *inode, struct file *file)
{
switch ((int)inode->i_private) {
case DEBUG_FILE_COUNTERS:
return single_open(file, pm_dbg_show_counters,
&inode->i_private);
case DEBUG_FILE_TIMERS:
default:
return single_open(file, pm_dbg_show_timers,
&inode->i_private);
};
}
static const struct file_operations debug_fops = {
.open = pm_dbg_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
{
int i;
s64 t;
t = sched_clock();
for (i = 0; i < 4; i++)
pwrdm->state_timer[i] = 0;
pwrdm->timer = t;
return 0;
}
static int __init pm_dbg_init(void)
{
struct dentry *d;
d = debugfs_create_dir("pm_debug", NULL);
if (IS_ERR(d))
return PTR_ERR(d);
(void) debugfs_create_file("count", S_IRUGO,
d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
(void) debugfs_create_file("time", S_IRUGO,
d, (void *)DEBUG_FILE_TIMERS, &debug_fops);
pwrdm_for_each(pwrdms_setup, NULL);
pm_dbg_init_done = 1;
return 0;
}
late_initcall(pm_dbg_init);
#else
void pm_dbg_update_time(struct powerdomain *pwrdm, int prev) {}
#endif
Reference in New Issue View Git Blame Copy Permalink