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_printf(s, "\n");
118
119	return 0;
120}
121
122static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
123{
124	struct seq_file *s = (struct seq_file *)user;
125	int i;
126
127	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
128		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
129		strncmp(pwrdm->name, "dpll", 4) == 0)
130		return 0;
131
132	pwrdm_state_switch(pwrdm);
133
134	seq_printf(s, "%s (%s)", pwrdm->name,
135		pwrdm_state_names[pwrdm->state]);
136
137	for (i = 0; i < 4; i++)
138		seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
139			pwrdm->state_timer[i]);
140
141	seq_printf(s, "\n");
142	return 0;
143}
144
145static int pm_dbg_show_counters(struct seq_file *s, void *unused)
146{
147	pwrdm_for_each(pwrdm_dbg_show_counter, s);
148	clkdm_for_each(clkdm_dbg_show_counter, s);
149
150	return 0;
151}
152
153static int pm_dbg_show_timers(struct seq_file *s, void *unused)
154{
155	pwrdm_for_each(pwrdm_dbg_show_timer, s);
156	return 0;
157}
158
159static int pm_dbg_open(struct inode *inode, struct file *file)
160{
161	switch ((int)inode->i_private) {
162	case DEBUG_FILE_COUNTERS:
163		return single_open(file, pm_dbg_show_counters,
164			&inode->i_private);
165	case DEBUG_FILE_TIMERS:
166	default:
167		return single_open(file, pm_dbg_show_timers,
168			&inode->i_private);
169	}
170}
171
172static const struct file_operations debug_fops = {
173	.open           = pm_dbg_open,
174	.read           = seq_read,
175	.llseek         = seq_lseek,
176	.release        = single_release,
177};
178
179static int pwrdm_suspend_get(void *data, u64 *val)
180{
181	int ret = -EINVAL;
182
183	if (cpu_is_omap34xx())
184		ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
185	*val = ret;
186
187	if (ret >= 0)
188		return 0;
189	return *val;
190}
191
192static int pwrdm_suspend_set(void *data, u64 val)
193{
194	if (cpu_is_omap34xx())
195		return omap3_pm_set_suspend_state(
196			(struct powerdomain *)data, (int)val);
197	return -EINVAL;
198}
199
200DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
201			pwrdm_suspend_set, "%llu\n");
202
203static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
204{
205	int i;
206	s64 t;
207	struct dentry *d;
208
209	t = sched_clock();
210
211	for (i = 0; i < 4; i++)
212		pwrdm->state_timer[i] = 0;
213
214	pwrdm->timer = t;
215
216	if (strncmp(pwrdm->name, "dpll", 4) == 0)
217		return 0;
218
219	d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
220	if (d)
221		(void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
222			(void *)pwrdm, &pwrdm_suspend_fops);
223
224	return 0;
225}
226
227static int option_get(void *data, u64 *val)
228{
229	u32 *option = data;
230
231	*val = *option;
232
233	return 0;
234}
235
236static int option_set(void *data, u64 val)
237{
238	u32 *option = data;
239
240	*option = val;
241
242	if (option == &enable_off_mode) {
243		if (val)
244			omap_pm_enable_off_mode();
245		else
246			omap_pm_disable_off_mode();
247		if (cpu_is_omap34xx())
248			omap3_pm_off_mode_enable(val);
249	}
250
251	return 0;
252}
253
254DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
255
256static int __init pm_dbg_init(void)
257{
258	struct dentry *d;
259
260	if (pm_dbg_init_done)
261		return 0;
262
263	d = debugfs_create_dir("pm_debug", NULL);
264	if (!d)
265		return -EINVAL;
266
267	(void) debugfs_create_file("count", S_IRUGO,
268		d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
269	(void) debugfs_create_file("time", S_IRUGO,
270		d, (void *)DEBUG_FILE_TIMERS, &debug_fops);
271
272	pwrdm_for_each(pwrdms_setup, (void *)d);
273
274	(void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
275				   &enable_off_mode, &pm_dbg_option_fops);
276	pm_dbg_init_done = 1;
277
278	return 0;
279}
280omap_arch_initcall(pm_dbg_init);
281
282#endif
283