1 files changed, 282 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap2/pm-debug.c b/kernel/arch/arm/mach-omap2/pm-debug.c
new file mode 100644
index 000000000..0b339861d
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/pm-debug.c
@@ -0,0 +1,282 @@
+/*
+ * 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 <linux/module.h>
+#include <linux/slab.h>
+
+#include "clock.h"
+#include "powerdomain.h"
+#include "clockdomain.h"
+#include "omap-pm.h"
+
+#include "soc.h"
+#include "cm2xxx_3xxx.h"
+#include "prm2xxx_3xxx.h"
+#include "pm.h"
+
+u32 enable_off_mode;
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static int pm_dbg_init_done;
+
+static int pm_dbg_init(void);
+
+enum {
+	DEBUG_FILE_COUNTERS = 0,
+	DEBUG_FILE_TIMERS,
+};
+
+static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
+	"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)\n", clkdm->name, clkdm->pwrdm.ptr->name,
+		   clkdm->usecount);
+
+	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 < PWRDM_MAX_PWRSTS; i++)
+		seq_printf(s, ",%s:%d", pwrdm_state_names[i],
+			pwrdm->state_counter[i]);
+
+	seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter);
+	for (i = 0; i < pwrdm->banks; i++)
+		seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1,
+				pwrdm->ret_mem_off_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 pwrdm_suspend_get(void *data, u64 *val)
+{
+	int ret = -EINVAL;
+
+	if (cpu_is_omap34xx())
+		ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
+	*val = ret;
+
+	if (ret >= 0)
+		return 0;
+	return *val;
+}
+
+static int pwrdm_suspend_set(void *data, u64 val)
+{
+	if (cpu_is_omap34xx())
+		return omap3_pm_set_suspend_state(
+			(struct powerdomain *)data, (int)val);
+	return -EINVAL;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
+			pwrdm_suspend_set, "%llu\n");
+
+static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
+{
+	int i;
+	s64 t;
+	struct dentry *d;
+
+	t = sched_clock();
+
+	for (i = 0; i < 4; i++)
+		pwrdm->state_timer[i] = 0;
+
+	pwrdm->timer = t;
+
+	if (strncmp(pwrdm->name, "dpll", 4) == 0)
+		return 0;
+
+	d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
+	if (d)
+		(void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
+			(void *)pwrdm, &pwrdm_suspend_fops);
+
+	return 0;
+}
+
+static int option_get(void *data, u64 *val)
+{
+	u32 *option = data;
+
+	*val = *option;
+
+	return 0;
+}
+
+static int option_set(void *data, u64 val)
+{
+	u32 *option = data;
+
+	*option = val;
+
+	if (option == &enable_off_mode) {
+		if (val)
+			omap_pm_enable_off_mode();
+		else
+			omap_pm_disable_off_mode();
+		if (cpu_is_omap34xx())
+			omap3_pm_off_mode_enable(val);
+	}
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
+
+static int __init pm_dbg_init(void)
+{
+	struct dentry *d;
+
+	if (pm_dbg_init_done)
+		return 0;
+
+	d = debugfs_create_dir("pm_debug", NULL);
+	if (!d)
+		return -EINVAL;
+
+	(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, (void *)d);
+
+	(void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
+				   &enable_off_mode, &pm_dbg_option_fops);
+	pm_dbg_init_done = 1;
+
+	return 0;
+}
+omap_arch_initcall(pm_dbg_init);
+
+#endif