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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
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
