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 
41 static int pm_dbg_init_done;
42 
43 static int pm_dbg_init(void);
44 
45 static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
46 	"OFF",
47 	"RET",
48 	"INA",
49 	"ON"
50 };
51 
pm_dbg_update_time(struct powerdomain * pwrdm,int prev)52 void 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 
clkdm_dbg_show_counter(struct clockdomain * clkdm,void * user)67 static 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 
pwrdm_dbg_show_counter(struct powerdomain * pwrdm,void * user)82 static 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 
pwrdm_dbg_show_timer(struct powerdomain * pwrdm,void * user)111 static 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 
pm_dbg_counters_show(struct seq_file * s,void * unused)134 static 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 }
141 DEFINE_SHOW_ATTRIBUTE(pm_dbg_counters);
142 
pm_dbg_timers_show(struct seq_file * s,void * unused)143 static 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 }
148 DEFINE_SHOW_ATTRIBUTE(pm_dbg_timers);
149 
pwrdm_suspend_get(void * data,u64 * val)150 static 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 
pwrdm_suspend_set(void * data,u64 val)163 static 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 
171 DEFINE_DEBUGFS_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
172 			  pwrdm_suspend_set, "%llu\n");
173 
pwrdms_setup(struct powerdomain * pwrdm,void * dir)174 static 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 
option_get(void * data,u64 * val)197 static int option_get(void *data, u64 *val)
198 {
199 	u32 *option = data;
200 
201 	*val = *option;
202 
203 	return 0;
204 }
205 
option_set(void * data,u64 val)206 static 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 
220 DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
221 
pm_dbg_init(void)222 static 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 }
242 omap_arch_initcall(pm_dbg_init);
243 
244 #endif
245