1/*
  2 * OMAP Power Management debug routines
  3 *
  4 * Copyright (C) 2005 Texas Instruments, Inc.
  5 * Copyright (C) 2006-2008 Nokia Corporation
  6 *
  7 * Written by:
  8 * Richard Woodruff <r-woodruff2@ti.com>
  9 * Tony Lindgren
 10 * Juha Yrjola
 11 * Amit Kucheria <amit.kucheria@nokia.com>
 12 * Igor Stoppa <igor.stoppa@nokia.com>
 13 * Jouni Hogander
 14 *
 15 * Based on pm.c for omap2
 16 *
 17 * This program is free software; you can redistribute it and/or modify
 18 * it under the terms of the GNU General Public License version 2 as
 19 * published by the Free Software Foundation.
 20 */
 21
 22#include <linux/kernel.h>
 23#include <linux/sched.h>
 24#include <linux/clk.h>
 25#include <linux/err.h>
 26#include <linux/io.h>
 27#include <linux/module.h>
 28#include <linux/slab.h>
 29
 30#include "clock.h"
 
 31#include "powerdomain.h"
 32#include "clockdomain.h"
 33#include "omap-pm.h"
 
 34
 35#include "soc.h"
 36#include "cm2xxx_3xxx.h"
 37#include "prm2xxx_3xxx.h"
 38#include "pm.h"
 39
 40u32 enable_off_mode;
 41
 42#ifdef CONFIG_DEBUG_FS
 43#include <linux/debugfs.h>
 44#include <linux/seq_file.h>
 45
 46static int pm_dbg_init_done;
 47
 48static int pm_dbg_init(void);
 49
 50enum {
 51	DEBUG_FILE_COUNTERS = 0,
 52	DEBUG_FILE_TIMERS,
 53};
 54
 55static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
 56	"OFF",
 57	"RET",
 58	"INA",
 59	"ON"
 60};
 61
 62void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
 63{
 64	s64 t;
 65
 66	if (!pm_dbg_init_done)
 67		return ;
 68
 69	/* Update timer for previous state */
 70	t = sched_clock();
 71
 72	pwrdm->state_timer[prev] += t - pwrdm->timer;
 73
 74	pwrdm->timer = t;
 75}
 76
 77static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
 78{
 79	struct seq_file *s = (struct seq_file *)user;
 80
 81	if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
 82		strcmp(clkdm->name, "wkup_clkdm") == 0 ||
 83		strncmp(clkdm->name, "dpll", 4) == 0)
 84		return 0;
 85
 86	seq_printf(s, "%s->%s (%d)\n", clkdm->name, clkdm->pwrdm.ptr->name,
 87		   clkdm->usecount);
 
 
 88
 89	return 0;
 90}
 91
 92static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
 93{
 94	struct seq_file *s = (struct seq_file *)user;
 95	int i;
 96
 97	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
 98		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
 99		strncmp(pwrdm->name, "dpll", 4) == 0)
100		return 0;
101
102	if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
103		printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
104			pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
105
106	seq_printf(s, "%s (%s)", pwrdm->name,
107			pwrdm_state_names[pwrdm->state]);
108	for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
109		seq_printf(s, ",%s:%d", pwrdm_state_names[i],
110			pwrdm->state_counter[i]);
111
112	seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter);
113	for (i = 0; i < pwrdm->banks; i++)
114		seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1,
115				pwrdm->ret_mem_off_counter[i]);
116
117	seq_putc(s, '\n');
 
118	return 0;
119}
120
121static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
122{
123	struct seq_file *s = (struct seq_file *)user;
124	int i;
125
126	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
127		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
128		strncmp(pwrdm->name, "dpll", 4) == 0)
129		return 0;
130
131	pwrdm_state_switch(pwrdm);
132
133	seq_printf(s, "%s (%s)", pwrdm->name,
134		pwrdm_state_names[pwrdm->state]);
135
136	for (i = 0; i < 4; i++)
137		seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
138			pwrdm->state_timer[i]);
139
140	seq_putc(s, '\n');
141	return 0;
142}
143
144static int pm_dbg_show_counters(struct seq_file *s, void *unused)
145{
146	pwrdm_for_each(pwrdm_dbg_show_counter, s);
147	clkdm_for_each(clkdm_dbg_show_counter, s);
148
149	return 0;
150}
151
152static int pm_dbg_show_timers(struct seq_file *s, void *unused)
153{
154	pwrdm_for_each(pwrdm_dbg_show_timer, s);
155	return 0;
156}
157
158static int pm_dbg_open(struct inode *inode, struct file *file)
159{
160	switch ((int)inode->i_private) {
161	case DEBUG_FILE_COUNTERS:
162		return single_open(file, pm_dbg_show_counters,
163			&inode->i_private);
164	case DEBUG_FILE_TIMERS:
165	default:
166		return single_open(file, pm_dbg_show_timers,
167			&inode->i_private);
168	}
169}
170
171static const struct file_operations debug_fops = {
172	.open           = pm_dbg_open,
173	.read           = seq_read,
174	.llseek         = seq_lseek,
175	.release        = single_release,
176};
177
178static int pwrdm_suspend_get(void *data, u64 *val)
179{
180	int ret = -EINVAL;
181
182	if (cpu_is_omap34xx())
183		ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
184	*val = ret;
185
186	if (ret >= 0)
187		return 0;
188	return *val;
189}
190
191static int pwrdm_suspend_set(void *data, u64 val)
192{
193	if (cpu_is_omap34xx())
194		return omap3_pm_set_suspend_state(
195			(struct powerdomain *)data, (int)val);
196	return -EINVAL;
197}
198
199DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
200			pwrdm_suspend_set, "%llu\n");
201
202static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
203{
204	int i;
205	s64 t;
206	struct dentry *d;
207
208	t = sched_clock();
209
210	for (i = 0; i < 4; i++)
211		pwrdm->state_timer[i] = 0;
212
213	pwrdm->timer = t;
214
215	if (strncmp(pwrdm->name, "dpll", 4) == 0)
216		return 0;
217
218	d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
219	if (d)
220		(void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
221			(void *)pwrdm, &pwrdm_suspend_fops);
222
223	return 0;
224}
225
226static int option_get(void *data, u64 *val)
227{
228	u32 *option = data;
229
230	*val = *option;
231
232	return 0;
233}
234
235static int option_set(void *data, u64 val)
236{
237	u32 *option = data;
238
239	*option = val;
240
241	if (option == &enable_off_mode) {
242		if (val)
243			omap_pm_enable_off_mode();
244		else
245			omap_pm_disable_off_mode();
246		if (cpu_is_omap34xx())
247			omap3_pm_off_mode_enable(val);
248	}
249
250	return 0;
251}
252
253DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
254
255static int __init pm_dbg_init(void)
256{
257	struct dentry *d;
258
259	if (pm_dbg_init_done)
260		return 0;
261
262	d = debugfs_create_dir("pm_debug", NULL);
263	if (!d)
264		return -EINVAL;
265
266	(void) debugfs_create_file("count", S_IRUGO,
267		d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
268	(void) debugfs_create_file("time", S_IRUGO,
269		d, (void *)DEBUG_FILE_TIMERS, &debug_fops);
270
271	pwrdm_for_each(pwrdms_setup, (void *)d);
272
273	(void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
274				   &enable_off_mode, &pm_dbg_option_fops);
275	pm_dbg_init_done = 1;
276
277	return 0;
278}
279omap_arch_initcall(pm_dbg_init);
280
281#endif

  1/*
  2 * OMAP Power Management debug routines
  3 *
  4 * Copyright (C) 2005 Texas Instruments, Inc.
  5 * Copyright (C) 2006-2008 Nokia Corporation
  6 *
  7 * Written by:
  8 * Richard Woodruff <r-woodruff2@ti.com>
  9 * Tony Lindgren
 10 * Juha Yrjola
 11 * Amit Kucheria <amit.kucheria@nokia.com>
 12 * Igor Stoppa <igor.stoppa@nokia.com>
 13 * Jouni Hogander
 14 *
 15 * Based on pm.c for omap2
 16 *
 17 * This program is free software; you can redistribute it and/or modify
 18 * it under the terms of the GNU General Public License version 2 as
 19 * published by the Free Software Foundation.
 20 */
 21
 22#include <linux/kernel.h>
 23#include <linux/sched.h>
 24#include <linux/clk.h>
 25#include <linux/err.h>
 26#include <linux/io.h>
 27#include <linux/module.h>
 28#include <linux/slab.h>
 29
 30#include <plat/clock.h>
 31#include <plat/board.h>
 32#include "powerdomain.h"
 33#include "clockdomain.h"
 34#include <plat/dmtimer.h>
 35#include <plat/omap-pm.h>
 36
 
 37#include "cm2xxx_3xxx.h"
 38#include "prm2xxx_3xxx.h"
 39#include "pm.h"
 40
 41u32 enable_off_mode;
 42
 43#ifdef CONFIG_DEBUG_FS
 44#include <linux/debugfs.h>
 45#include <linux/seq_file.h>
 46
 47static int pm_dbg_init_done;
 48
 49static int pm_dbg_init(void);
 50
 51enum {
 52	DEBUG_FILE_COUNTERS = 0,
 53	DEBUG_FILE_TIMERS,
 54};
 55
 56static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
 57	"OFF",
 58	"RET",
 59	"INA",
 60	"ON"
 61};
 62
 63void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
 64{
 65	s64 t;
 66
 67	if (!pm_dbg_init_done)
 68		return ;
 69
 70	/* Update timer for previous state */
 71	t = sched_clock();
 72
 73	pwrdm->state_timer[prev] += t - pwrdm->timer;
 74
 75	pwrdm->timer = t;
 76}
 77
 78static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
 79{
 80	struct seq_file *s = (struct seq_file *)user;
 81
 82	if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
 83		strcmp(clkdm->name, "wkup_clkdm") == 0 ||
 84		strncmp(clkdm->name, "dpll", 4) == 0)
 85		return 0;
 86
 87	seq_printf(s, "%s->%s (%d)", clkdm->name,
 88			clkdm->pwrdm.ptr->name,
 89			atomic_read(&clkdm->usecount));
 90	seq_printf(s, "\n");
 91
 92	return 0;
 93}
 94
 95static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
 96{
 97	struct seq_file *s = (struct seq_file *)user;
 98	int i;
 99
100	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
101		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
102		strncmp(pwrdm->name, "dpll", 4) == 0)
103		return 0;
104
105	if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
106		printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
107			pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
108
109	seq_printf(s, "%s (%s)", pwrdm->name,
110			pwrdm_state_names[pwrdm->state]);
111	for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
112		seq_printf(s, ",%s:%d", pwrdm_state_names[i],
113			pwrdm->state_counter[i]);
114
115	seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter);
116	for (i = 0; i < pwrdm->banks; i++)
117		seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1,
118				pwrdm->ret_mem_off_counter[i]);
119
120	seq_printf(s, "\n");
121
122	return 0;
123}
124
125static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
126{
127	struct seq_file *s = (struct seq_file *)user;
128	int i;
129
130	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
131		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
132		strncmp(pwrdm->name, "dpll", 4) == 0)
133		return 0;
134
135	pwrdm_state_switch(pwrdm);
136
137	seq_printf(s, "%s (%s)", pwrdm->name,
138		pwrdm_state_names[pwrdm->state]);
139
140	for (i = 0; i < 4; i++)
141		seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
142			pwrdm->state_timer[i]);
143
144	seq_printf(s, "\n");
145	return 0;
146}
147
148static int pm_dbg_show_counters(struct seq_file *s, void *unused)
149{
150	pwrdm_for_each(pwrdm_dbg_show_counter, s);
151	clkdm_for_each(clkdm_dbg_show_counter, s);
152
153	return 0;
154}
155
156static int pm_dbg_show_timers(struct seq_file *s, void *unused)
157{
158	pwrdm_for_each(pwrdm_dbg_show_timer, s);
159	return 0;
160}
161
162static int pm_dbg_open(struct inode *inode, struct file *file)
163{
164	switch ((int)inode->i_private) {
165	case DEBUG_FILE_COUNTERS:
166		return single_open(file, pm_dbg_show_counters,
167			&inode->i_private);
168	case DEBUG_FILE_TIMERS:
169	default:
170		return single_open(file, pm_dbg_show_timers,
171			&inode->i_private);
172	};
173}
174
175static const struct file_operations debug_fops = {
176	.open           = pm_dbg_open,
177	.read           = seq_read,
178	.llseek         = seq_lseek,
179	.release        = single_release,
180};
181
182static int pwrdm_suspend_get(void *data, u64 *val)
183{
184	int ret = -EINVAL;
185
186	if (cpu_is_omap34xx())
187		ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
188	*val = ret;
189
190	if (ret >= 0)
191		return 0;
192	return *val;
193}
194
195static int pwrdm_suspend_set(void *data, u64 val)
196{
197	if (cpu_is_omap34xx())
198		return omap3_pm_set_suspend_state(
199			(struct powerdomain *)data, (int)val);
200	return -EINVAL;
201}
202
203DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
204			pwrdm_suspend_set, "%llu\n");
205
206static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
207{
208	int i;
209	s64 t;
210	struct dentry *d;
211
212	t = sched_clock();
213
214	for (i = 0; i < 4; i++)
215		pwrdm->state_timer[i] = 0;
216
217	pwrdm->timer = t;
218
219	if (strncmp(pwrdm->name, "dpll", 4) == 0)
220		return 0;
221
222	d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
223
224	(void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
225			(void *)pwrdm, &pwrdm_suspend_fops);
226
227	return 0;
228}
229
230static int option_get(void *data, u64 *val)
231{
232	u32 *option = data;
233
234	*val = *option;
235
236	return 0;
237}
238
239static int option_set(void *data, u64 val)
240{
241	u32 *option = data;
242
243	*option = val;
244
245	if (option == &enable_off_mode) {
246		if (val)
247			omap_pm_enable_off_mode();
248		else
249			omap_pm_disable_off_mode();
250		if (cpu_is_omap34xx())
251			omap3_pm_off_mode_enable(val);
252	}
253
254	return 0;
255}
256
257DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
258
259static int __init pm_dbg_init(void)
260{
261	struct dentry *d;
262
263	if (pm_dbg_init_done)
264		return 0;
265
266	d = debugfs_create_dir("pm_debug", NULL);
267	if (IS_ERR(d))
268		return PTR_ERR(d);
269
270	(void) debugfs_create_file("count", S_IRUGO,
271		d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
272	(void) debugfs_create_file("time", S_IRUGO,
273		d, (void *)DEBUG_FILE_TIMERS, &debug_fops);
274
275	pwrdm_for_each(pwrdms_setup, (void *)d);
276
277	(void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
278				   &enable_off_mode, &pm_dbg_option_fops);
279	pm_dbg_init_done = 1;
280
281	return 0;
282}
283arch_initcall(pm_dbg_init);
284
285#endif