1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * OMAP Power Management debug routines
4 *
5 * Copyright (C) 2005 Texas Instruments, Inc.
6 * Copyright (C) 2006-2008 Nokia Corporation
7 *
8 * Written by:
9 * Richard Woodruff <r-woodruff2@ti.com>
10 * Tony Lindgren
11 * Juha Yrjola
12 * Amit Kucheria <amit.kucheria@nokia.com>
13 * Igor Stoppa <igor.stoppa@nokia.com>
14 * Jouni Hogander
15 *
16 * Based on pm.c for omap2
17 */
18
19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/sched/clock.h>
22#include <linux/clk.h>
23#include <linux/err.h>
24#include <linux/io.h>
25#include <linux/module.h>
26#include <linux/slab.h>
27
28#include "clock.h"
29#include "powerdomain.h"
30#include "clockdomain.h"
31
32#include "soc.h"
33#include "cm2xxx_3xxx.h"
34#include "prm2xxx_3xxx.h"
35#include "pm.h"
36
37#ifdef CONFIG_DEBUG_FS
38#include <linux/debugfs.h>
39#include <linux/seq_file.h>
40
41static int pm_dbg_init_done;
42
43static int pm_dbg_init(void);
44
45static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
46	"OFF",
47	"RET",
48	"INA",
49	"ON"
50};
51
52void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
53{
54	s64 t;
55
56	if (!pm_dbg_init_done)
57		return ;
58
59	/* Update timer for previous state */
60	t = sched_clock();
61
62	pwrdm->state_timer[prev] += t - pwrdm->timer;
63
64	pwrdm->timer = t;
65}
66
67static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
68{
69	struct seq_file *s = (struct seq_file *)user;
70
71	if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
72		strcmp(clkdm->name, "wkup_clkdm") == 0 ||
73		strncmp(clkdm->name, "dpll", 4) == 0)
74		return 0;
75
76	seq_printf(s, "%s->%s (%d)\n", clkdm->name, clkdm->pwrdm.ptr->name,
77		   clkdm->usecount);
78
79	return 0;
80}
81
82static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
83{
84	struct seq_file *s = (struct seq_file *)user;
85	int i;
86
87	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
88		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
89		strncmp(pwrdm->name, "dpll", 4) == 0)
90		return 0;
91
92	if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
93		printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
94			pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
95
96	seq_printf(s, "%s (%s)", pwrdm->name,
97			pwrdm_state_names[pwrdm->state]);
98	for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
99		seq_printf(s, ",%s:%d", pwrdm_state_names[i],
100			pwrdm->state_counter[i]);
101
102	seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter);
103	for (i = 0; i < pwrdm->banks; i++)
104		seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1,
105				pwrdm->ret_mem_off_counter[i]);
106
107	seq_putc(s, '\n');
108	return 0;
109}
110
111static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
112{
113	struct seq_file *s = (struct seq_file *)user;
114	int i;
115
116	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
117		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
118		strncmp(pwrdm->name, "dpll", 4) == 0)
119		return 0;
120
121	pwrdm_state_switch(pwrdm);
122
123	seq_printf(s, "%s (%s)", pwrdm->name,
124		pwrdm_state_names[pwrdm->state]);
125
126	for (i = 0; i < 4; i++)
127		seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
128			pwrdm->state_timer[i]);
129
130	seq_putc(s, '\n');
131	return 0;
132}
133
134static int pm_dbg_counters_show(struct seq_file *s, void *unused)
135{
136	pwrdm_for_each(pwrdm_dbg_show_counter, s);
137	clkdm_for_each(clkdm_dbg_show_counter, s);
138
139	return 0;
140}
141DEFINE_SHOW_ATTRIBUTE(pm_dbg_counters);
142
143static int pm_dbg_timers_show(struct seq_file *s, void *unused)
144{
145	pwrdm_for_each(pwrdm_dbg_show_timer, s);
146	return 0;
147}
148DEFINE_SHOW_ATTRIBUTE(pm_dbg_timers);
149
150static int pwrdm_suspend_get(void *data, u64 *val)
151{
152	int ret = -EINVAL;
153
154	if (cpu_is_omap34xx())
155		ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
156	*val = ret;
157
158	if (ret >= 0)
159		return 0;
160	return *val;
161}
162
163static int pwrdm_suspend_set(void *data, u64 val)
164{
165	if (cpu_is_omap34xx())
166		return omap3_pm_set_suspend_state(
167			(struct powerdomain *)data, (int)val);
168	return -EINVAL;
169}
170
171DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
172			pwrdm_suspend_set, "%llu\n");
173
174static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
175{
176	int i;
177	s64 t;
178	struct dentry *d;
179
180	t = sched_clock();
181
182	for (i = 0; i < 4; i++)
183		pwrdm->state_timer[i] = 0;
184
185	pwrdm->timer = t;
186
187	if (strncmp(pwrdm->name, "dpll", 4) == 0)
188		return 0;
189
190	d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
191	debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d, pwrdm,
192			    &pwrdm_suspend_fops);
193
194	return 0;
195}
196
197static int option_get(void *data, u64 *val)
198{
199	u32 *option = data;
200
201	*val = *option;
202
203	return 0;
204}
205
206static int option_set(void *data, u64 val)
207{
208	u32 *option = data;
209
210	*option = val;
211
212	if (option == &enable_off_mode) {
213		if (cpu_is_omap34xx())
214			omap3_pm_off_mode_enable(val);
215	}
216
217	return 0;
218}
219
220DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
221
222static int __init pm_dbg_init(void)
223{
224	struct dentry *d;
225
226	if (pm_dbg_init_done)
227		return 0;
228
229	d = debugfs_create_dir("pm_debug", NULL);
230
231	debugfs_create_file("count", 0444, d, NULL, &pm_dbg_counters_fops);
232	debugfs_create_file("time", 0444, d, NULL, &pm_dbg_timers_fops);
233
234	pwrdm_for_each(pwrdms_setup, (void *)d);
235
236	debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
237			    &enable_off_mode, &pm_dbg_option_fops);
238	pm_dbg_init_done = 1;
239
240	return 0;
241}
242omap_arch_initcall(pm_dbg_init);
243
244#endif
245