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Kevin Hilman8bd22942009-05-28 10:56:16 -07001/*
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>
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +030023#include <linux/sched.h>
Kevin Hilman8bd22942009-05-28 10:56:16 -070024#include <linux/clk.h>
25#include <linux/err.h>
26#include <linux/io.h>
Tero Kristo68d47782008-11-26 12:26:24 +020027#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090028#include <linux/slab.h>
Kevin Hilman8bd22942009-05-28 10:56:16 -070029
Tony Lindgrence491cf2009-10-20 09:40:47 -070030#include <plat/clock.h>
31#include <plat/board.h>
Paul Walmsley72e06d02010-12-21 21:05:16 -070032#include "powerdomain.h"
Paul Walmsley1540f2142010-12-21 21:05:15 -070033#include "clockdomain.h"
Santosh Shilimkar86b0c1e2010-09-15 01:03:59 +053034#include <plat/dmtimer.h>
Kevin Hilman6081dc32010-12-21 21:31:55 -070035#include <plat/omap-pm.h>
Kevin Hilman8bd22942009-05-28 10:56:16 -070036
Paul Walmsley59fb6592010-12-21 15:30:55 -070037#include "cm2xxx_3xxx.h"
38#include "prm2xxx_3xxx.h"
Kevin Hilman8bd22942009-05-28 10:56:16 -070039#include "pm.h"
40
Thara Gopinath6cdee912010-08-12 13:52:25 +053041u32 enable_off_mode;
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +030042
43#ifdef CONFIG_DEBUG_FS
44#include <linux/debugfs.h>
45#include <linux/seq_file.h>
46
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +030047static int pm_dbg_init_done;
48
Russell Kingc8fb13d2011-05-27 13:56:12 -070049static int pm_dbg_init(void);
Sergio Aguirre6b34f9d2010-01-14 11:01:15 -060050
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +030051enum {
52 DEBUG_FILE_COUNTERS = 0,
53 DEBUG_FILE_TIMERS,
54};
55
Paul Walmsley2354eb52009-12-08 16:33:12 -070056static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +030057 "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]);
Paul Walmsley2354eb52009-12-08 16:33:12 -0700111 for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300112 seq_printf(s, ",%s:%d", pwrdm_state_names[i],
113 pwrdm->state_counter[i]);
114
Thara Gopinathcde08f82010-02-24 12:05:50 -0700115 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
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300120 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
Tero Kristo68d47782008-11-26 12:26:24 +0200182static int pwrdm_suspend_get(void *data, u64 *val)
183{
Thara Gopinath6cdee912010-08-12 13:52:25 +0530184 int ret = -EINVAL;
185
186 if (cpu_is_omap34xx())
187 ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
Roel Kluin61b17d92009-12-16 17:22:04 +0100188 *val = ret;
Tero Kristo68d47782008-11-26 12:26:24 +0200189
Roel Kluin61b17d92009-12-16 17:22:04 +0100190 if (ret >= 0)
Tero Kristo68d47782008-11-26 12:26:24 +0200191 return 0;
192 return *val;
193}
194
195static int pwrdm_suspend_set(void *data, u64 val)
196{
Thara Gopinath6cdee912010-08-12 13:52:25 +0530197 if (cpu_is_omap34xx())
198 return omap3_pm_set_suspend_state(
199 (struct powerdomain *)data, (int)val);
200 return -EINVAL;
Tero Kristo68d47782008-11-26 12:26:24 +0200201}
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)
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300207{
208 int i;
209 s64 t;
Tero Kristo68d47782008-11-26 12:26:24 +0200210 struct dentry *d;
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300211
212 t = sched_clock();
213
214 for (i = 0; i < 4; i++)
215 pwrdm->state_timer[i] = 0;
216
217 pwrdm->timer = t;
218
Tero Kristo68d47782008-11-26 12:26:24 +0200219 if (strncmp(pwrdm->name, "dpll", 4) == 0)
220 return 0;
221
222 d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
Jean Pihet401606f2012-02-01 09:37:31 +0100223 if (!(IS_ERR_OR_NULL(d)))
224 (void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
Tero Kristo68d47782008-11-26 12:26:24 +0200225 (void *)pwrdm, &pwrdm_suspend_fops);
226
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300227 return 0;
228}
229
Kevin Hilmanc40552b2009-10-06 14:25:09 -0700230static 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
Thara Gopinath6cdee912010-08-12 13:52:25 +0530245 if (option == &enable_off_mode) {
Kevin Hilman6081dc32010-12-21 21:31:55 -0700246 if (val)
247 omap_pm_enable_off_mode();
248 else
249 omap_pm_disable_off_mode();
Thara Gopinath6cdee912010-08-12 13:52:25 +0530250 if (cpu_is_omap34xx())
251 omap3_pm_off_mode_enable(val);
252 }
Kevin Hilmanc40552b2009-10-06 14:25:09 -0700253
254 return 0;
255}
256
257DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
258
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300259static int __init pm_dbg_init(void)
260{
261 struct dentry *d;
262
Tero Kristo2811d6b2008-10-29 13:31:24 +0200263 if (pm_dbg_init_done)
264 return 0;
265
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300266 d = debugfs_create_dir("pm_debug", NULL);
Jean Pihet401606f2012-02-01 09:37:31 +0100267 if (IS_ERR_OR_NULL(d))
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300268 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
Paul Walmsleye909d62a82010-01-26 20:13:00 -0700275 pwrdm_for_each(pwrdms_setup, (void *)d);
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300276
Vasiliy Kulikovf9fbe472011-02-04 12:23:16 +0000277 (void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
Kevin Hilmanc40552b2009-10-06 14:25:09 -0700278 &enable_off_mode, &pm_dbg_option_fops);
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300279 pm_dbg_init_done = 1;
280
281 return 0;
282}
Tero Kristo2811d6b2008-10-29 13:31:24 +0200283arch_initcall(pm_dbg_init);
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300284
Peter 'p2' De Schrijver331b93f2008-10-15 18:13:48 +0300285#endif