![Peter Senna Tschudin](/assets/img/avatar_default.png)
Found by http://coccinelle.lip6.fr/ Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
285 lines
5.9 KiB
C
285 lines
5.9 KiB
C
/*
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* OMAP Power Management debug routines
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*
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* Copyright (C) 2005 Texas Instruments, Inc.
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* Copyright (C) 2006-2008 Nokia Corporation
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*
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* Written by:
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* Richard Woodruff <r-woodruff2@ti.com>
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* Tony Lindgren
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* Juha Yrjola
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* Amit Kucheria <amit.kucheria@nokia.com>
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* Igor Stoppa <igor.stoppa@nokia.com>
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* Jouni Hogander
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*
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* Based on pm.c for omap2
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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 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <plat/clock.h>
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#include "powerdomain.h"
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#include "clockdomain.h"
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#include <plat/dmtimer.h>
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#include <plat/omap-pm.h>
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#include "cm2xxx_3xxx.h"
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#include "prm2xxx_3xxx.h"
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#include "pm.h"
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u32 enable_off_mode;
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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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static int pm_dbg_init_done;
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static int pm_dbg_init(void);
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enum {
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DEBUG_FILE_COUNTERS = 0,
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DEBUG_FILE_TIMERS,
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};
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static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
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"OFF",
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"RET",
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"INA",
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"ON"
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};
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void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
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{
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s64 t;
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if (!pm_dbg_init_done)
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return ;
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/* Update timer for previous state */
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t = sched_clock();
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pwrdm->state_timer[prev] += t - pwrdm->timer;
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pwrdm->timer = t;
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}
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static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
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{
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struct seq_file *s = (struct seq_file *)user;
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if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
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strcmp(clkdm->name, "wkup_clkdm") == 0 ||
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strncmp(clkdm->name, "dpll", 4) == 0)
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return 0;
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seq_printf(s, "%s->%s (%d)", clkdm->name,
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clkdm->pwrdm.ptr->name,
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atomic_read(&clkdm->usecount));
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seq_printf(s, "\n");
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return 0;
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}
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static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
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{
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struct seq_file *s = (struct seq_file *)user;
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int i;
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if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
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strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
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strncmp(pwrdm->name, "dpll", 4) == 0)
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return 0;
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if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
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printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
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pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
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seq_printf(s, "%s (%s)", pwrdm->name,
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pwrdm_state_names[pwrdm->state]);
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for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
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seq_printf(s, ",%s:%d", pwrdm_state_names[i],
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pwrdm->state_counter[i]);
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seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter);
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for (i = 0; i < pwrdm->banks; i++)
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seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1,
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pwrdm->ret_mem_off_counter[i]);
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seq_printf(s, "\n");
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return 0;
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}
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static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
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{
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struct seq_file *s = (struct seq_file *)user;
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int i;
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if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
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strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
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strncmp(pwrdm->name, "dpll", 4) == 0)
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return 0;
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pwrdm_state_switch(pwrdm);
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seq_printf(s, "%s (%s)", pwrdm->name,
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pwrdm_state_names[pwrdm->state]);
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for (i = 0; i < 4; i++)
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seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
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pwrdm->state_timer[i]);
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seq_printf(s, "\n");
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return 0;
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}
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static int pm_dbg_show_counters(struct seq_file *s, void *unused)
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{
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pwrdm_for_each(pwrdm_dbg_show_counter, s);
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clkdm_for_each(clkdm_dbg_show_counter, s);
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return 0;
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}
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static int pm_dbg_show_timers(struct seq_file *s, void *unused)
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{
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pwrdm_for_each(pwrdm_dbg_show_timer, s);
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return 0;
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}
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static int pm_dbg_open(struct inode *inode, struct file *file)
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{
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switch ((int)inode->i_private) {
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case DEBUG_FILE_COUNTERS:
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return single_open(file, pm_dbg_show_counters,
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&inode->i_private);
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case DEBUG_FILE_TIMERS:
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default:
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return single_open(file, pm_dbg_show_timers,
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&inode->i_private);
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}
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}
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static const struct file_operations debug_fops = {
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.open = pm_dbg_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int pwrdm_suspend_get(void *data, u64 *val)
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{
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int ret = -EINVAL;
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if (cpu_is_omap34xx())
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ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
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*val = ret;
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if (ret >= 0)
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return 0;
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return *val;
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}
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static int pwrdm_suspend_set(void *data, u64 val)
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{
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if (cpu_is_omap34xx())
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return omap3_pm_set_suspend_state(
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(struct powerdomain *)data, (int)val);
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return -EINVAL;
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}
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DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
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pwrdm_suspend_set, "%llu\n");
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static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
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{
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int i;
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s64 t;
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struct dentry *d;
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t = sched_clock();
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for (i = 0; i < 4; i++)
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pwrdm->state_timer[i] = 0;
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pwrdm->timer = t;
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if (strncmp(pwrdm->name, "dpll", 4) == 0)
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return 0;
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d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
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if (!(IS_ERR_OR_NULL(d)))
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(void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
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(void *)pwrdm, &pwrdm_suspend_fops);
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return 0;
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}
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static int option_get(void *data, u64 *val)
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{
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u32 *option = data;
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*val = *option;
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return 0;
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}
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static int option_set(void *data, u64 val)
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{
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u32 *option = data;
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*option = val;
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if (option == &enable_off_mode) {
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if (val)
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omap_pm_enable_off_mode();
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else
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omap_pm_disable_off_mode();
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if (cpu_is_omap34xx())
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omap3_pm_off_mode_enable(val);
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}
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
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static int __init pm_dbg_init(void)
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{
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struct dentry *d;
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if (pm_dbg_init_done)
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return 0;
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d = debugfs_create_dir("pm_debug", NULL);
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if (IS_ERR_OR_NULL(d))
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return PTR_ERR(d);
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(void) debugfs_create_file("count", S_IRUGO,
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d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
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(void) debugfs_create_file("time", S_IRUGO,
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d, (void *)DEBUG_FILE_TIMERS, &debug_fops);
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pwrdm_for_each(pwrdms_setup, (void *)d);
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(void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
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&enable_off_mode, &pm_dbg_option_fops);
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pm_dbg_init_done = 1;
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return 0;
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}
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arch_initcall(pm_dbg_init);
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#endif
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