Commit | Line | Data |
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8bd22949 KH |
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> | |
331b93f4 | 23 | #include <linux/sched.h> |
8bd22949 KH |
24 | #include <linux/clk.h> |
25 | #include <linux/err.h> | |
26 | #include <linux/io.h> | |
68d4778c | 27 | #include <linux/module.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
8bd22949 | 29 | |
a135eaae | 30 | #include "clock.h" |
72e06d08 | 31 | #include "powerdomain.h" |
1540f214 | 32 | #include "clockdomain.h" |
1d5aef49 | 33 | #include "omap-pm.h" |
8bd22949 | 34 | |
e4c060db | 35 | #include "soc.h" |
59fb659b PW |
36 | #include "cm2xxx_3xxx.h" |
37 | #include "prm2xxx_3xxx.h" | |
8bd22949 KH |
38 | #include "pm.h" |
39 | ||
6cdee912 | 40 | u32 enable_off_mode; |
331b93f4 PDS |
41 | |
42 | #ifdef CONFIG_DEBUG_FS | |
43 | #include <linux/debugfs.h> | |
44 | #include <linux/seq_file.h> | |
45 | ||
331b93f4 PDS |
46 | static int pm_dbg_init_done; |
47 | ||
c8fb13d0 | 48 | static int pm_dbg_init(void); |
6b34f9d4 | 49 | |
331b93f4 PDS |
50 | enum { |
51 | DEBUG_FILE_COUNTERS = 0, | |
52 | DEBUG_FILE_TIMERS, | |
53 | }; | |
54 | ||
2354eb5a | 55 | static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = { |
331b93f4 PDS |
56 | "OFF", |
57 | "RET", | |
58 | "INA", | |
59 | "ON" | |
60 | }; | |
61 | ||
62 | void 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 | ||
77 | static 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)", clkdm->name, | |
87 | clkdm->pwrdm.ptr->name, | |
88 | atomic_read(&clkdm->usecount)); | |
89 | seq_printf(s, "\n"); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user) | |
95 | { | |
96 | struct seq_file *s = (struct seq_file *)user; | |
97 | int i; | |
98 | ||
99 | if (strcmp(pwrdm->name, "emu_pwrdm") == 0 || | |
100 | strcmp(pwrdm->name, "wkup_pwrdm") == 0 || | |
101 | strncmp(pwrdm->name, "dpll", 4) == 0) | |
102 | return 0; | |
103 | ||
104 | if (pwrdm->state != pwrdm_read_pwrst(pwrdm)) | |
105 | printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n", | |
106 | pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm)); | |
107 | ||
108 | seq_printf(s, "%s (%s)", pwrdm->name, | |
109 | pwrdm_state_names[pwrdm->state]); | |
2354eb5a | 110 | for (i = 0; i < PWRDM_MAX_PWRSTS; i++) |
331b93f4 PDS |
111 | seq_printf(s, ",%s:%d", pwrdm_state_names[i], |
112 | pwrdm->state_counter[i]); | |
113 | ||
cde08f81 TG |
114 | seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter); |
115 | for (i = 0; i < pwrdm->banks; i++) | |
116 | seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1, | |
117 | pwrdm->ret_mem_off_counter[i]); | |
118 | ||
331b93f4 PDS |
119 | seq_printf(s, "\n"); |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user) | |
125 | { | |
126 | struct seq_file *s = (struct seq_file *)user; | |
127 | int i; | |
128 | ||
129 | if (strcmp(pwrdm->name, "emu_pwrdm") == 0 || | |
130 | strcmp(pwrdm->name, "wkup_pwrdm") == 0 || | |
131 | strncmp(pwrdm->name, "dpll", 4) == 0) | |
132 | return 0; | |
133 | ||
134 | pwrdm_state_switch(pwrdm); | |
135 | ||
136 | seq_printf(s, "%s (%s)", pwrdm->name, | |
137 | pwrdm_state_names[pwrdm->state]); | |
138 | ||
139 | for (i = 0; i < 4; i++) | |
140 | seq_printf(s, ",%s:%lld", pwrdm_state_names[i], | |
141 | pwrdm->state_timer[i]); | |
142 | ||
143 | seq_printf(s, "\n"); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | static int pm_dbg_show_counters(struct seq_file *s, void *unused) | |
148 | { | |
149 | pwrdm_for_each(pwrdm_dbg_show_counter, s); | |
150 | clkdm_for_each(clkdm_dbg_show_counter, s); | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int pm_dbg_show_timers(struct seq_file *s, void *unused) | |
156 | { | |
157 | pwrdm_for_each(pwrdm_dbg_show_timer, s); | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static int pm_dbg_open(struct inode *inode, struct file *file) | |
162 | { | |
163 | switch ((int)inode->i_private) { | |
164 | case DEBUG_FILE_COUNTERS: | |
165 | return single_open(file, pm_dbg_show_counters, | |
166 | &inode->i_private); | |
167 | case DEBUG_FILE_TIMERS: | |
168 | default: | |
169 | return single_open(file, pm_dbg_show_timers, | |
170 | &inode->i_private); | |
c09fcc43 | 171 | } |
331b93f4 PDS |
172 | } |
173 | ||
174 | static const struct file_operations debug_fops = { | |
175 | .open = pm_dbg_open, | |
176 | .read = seq_read, | |
177 | .llseek = seq_lseek, | |
178 | .release = single_release, | |
179 | }; | |
180 | ||
68d4778c TK |
181 | static int pwrdm_suspend_get(void *data, u64 *val) |
182 | { | |
6cdee912 TG |
183 | int ret = -EINVAL; |
184 | ||
185 | if (cpu_is_omap34xx()) | |
186 | ret = omap3_pm_get_suspend_state((struct powerdomain *)data); | |
61b17d97 | 187 | *val = ret; |
68d4778c | 188 | |
61b17d97 | 189 | if (ret >= 0) |
68d4778c TK |
190 | return 0; |
191 | return *val; | |
192 | } | |
193 | ||
194 | static int pwrdm_suspend_set(void *data, u64 val) | |
195 | { | |
6cdee912 TG |
196 | if (cpu_is_omap34xx()) |
197 | return omap3_pm_set_suspend_state( | |
198 | (struct powerdomain *)data, (int)val); | |
199 | return -EINVAL; | |
68d4778c TK |
200 | } |
201 | ||
202 | DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get, | |
203 | pwrdm_suspend_set, "%llu\n"); | |
204 | ||
205 | static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir) | |
331b93f4 PDS |
206 | { |
207 | int i; | |
208 | s64 t; | |
68d4778c | 209 | struct dentry *d; |
331b93f4 PDS |
210 | |
211 | t = sched_clock(); | |
212 | ||
213 | for (i = 0; i < 4; i++) | |
214 | pwrdm->state_timer[i] = 0; | |
215 | ||
216 | pwrdm->timer = t; | |
217 | ||
68d4778c TK |
218 | if (strncmp(pwrdm->name, "dpll", 4) == 0) |
219 | return 0; | |
220 | ||
221 | d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir); | |
401606fd JP |
222 | if (!(IS_ERR_OR_NULL(d))) |
223 | (void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d, | |
68d4778c TK |
224 | (void *)pwrdm, &pwrdm_suspend_fops); |
225 | ||
331b93f4 PDS |
226 | return 0; |
227 | } | |
228 | ||
c40552bc KH |
229 | static int option_get(void *data, u64 *val) |
230 | { | |
231 | u32 *option = data; | |
232 | ||
233 | *val = *option; | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static int option_set(void *data, u64 val) | |
239 | { | |
240 | u32 *option = data; | |
241 | ||
242 | *option = val; | |
243 | ||
6cdee912 | 244 | if (option == &enable_off_mode) { |
6081dc34 KH |
245 | if (val) |
246 | omap_pm_enable_off_mode(); | |
247 | else | |
248 | omap_pm_disable_off_mode(); | |
6cdee912 TG |
249 | if (cpu_is_omap34xx()) |
250 | omap3_pm_off_mode_enable(val); | |
251 | } | |
c40552bc KH |
252 | |
253 | return 0; | |
254 | } | |
255 | ||
256 | DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n"); | |
257 | ||
331b93f4 PDS |
258 | static int __init pm_dbg_init(void) |
259 | { | |
260 | struct dentry *d; | |
261 | ||
2811d6b3 TK |
262 | if (pm_dbg_init_done) |
263 | return 0; | |
264 | ||
331b93f4 | 265 | d = debugfs_create_dir("pm_debug", NULL); |
401606fd | 266 | if (IS_ERR_OR_NULL(d)) |
331b93f4 PDS |
267 | return PTR_ERR(d); |
268 | ||
269 | (void) debugfs_create_file("count", S_IRUGO, | |
270 | d, (void *)DEBUG_FILE_COUNTERS, &debug_fops); | |
271 | (void) debugfs_create_file("time", S_IRUGO, | |
272 | d, (void *)DEBUG_FILE_TIMERS, &debug_fops); | |
273 | ||
e909d62a | 274 | pwrdm_for_each(pwrdms_setup, (void *)d); |
331b93f4 | 275 | |
f9fbe47c | 276 | (void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d, |
c40552bc | 277 | &enable_off_mode, &pm_dbg_option_fops); |
331b93f4 PDS |
278 | pm_dbg_init_done = 1; |
279 | ||
280 | return 0; | |
281 | } | |
2811d6b3 | 282 | arch_initcall(pm_dbg_init); |
331b93f4 | 283 | |
331b93f4 | 284 | #endif |