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	if (!(IS_ERR_OR_NULL(d)))
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_OR_NULL(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
286