blob: 31325e6cd4b4ace3c7d153158a30b0de7a8017be (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "ssi_config.h"
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <crypto/ctr.h>
#include <linux/pm_runtime.h>
#include "ssi_driver.h"
#include "ssi_buffer_mgr.h"
#include "ssi_request_mgr.h"
#include "ssi_sram_mgr.h"
#include "ssi_sysfs.h"
#include "ssi_ivgen.h"
#include "ssi_hash.h"
#include "ssi_pm.h"
#if defined(CONFIG_PM_RUNTIME) || defined(CONFIG_PM_SLEEP)
#define POWER_DOWN_ENABLE 0x01
#define POWER_DOWN_DISABLE 0x00
int ssi_power_mgr_runtime_suspend(struct device *dev)
{
struct ssi_drvdata *drvdata =
(struct ssi_drvdata *)dev_get_drvdata(dev);
int rc;
SSI_LOG_DEBUG("set HOST_POWER_DOWN_EN\n");
WRITE_REGISTER(drvdata->cc_base + CC_REG_OFFSET(HOST_RGF, HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
rc = ssi_request_mgr_runtime_suspend_queue(drvdata);
if (rc != 0) {
SSI_LOG_ERR("ssi_request_mgr_runtime_suspend_queue (%x)\n", rc);
return rc;
}
fini_cc_regs(drvdata);
cc_clk_off(drvdata);
return 0;
}
int ssi_power_mgr_runtime_resume(struct device *dev)
{
int rc;
struct ssi_drvdata *drvdata =
(struct ssi_drvdata *)dev_get_drvdata(dev);
SSI_LOG_DEBUG("unset HOST_POWER_DOWN_EN\n");
WRITE_REGISTER(drvdata->cc_base + CC_REG_OFFSET(HOST_RGF, HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE);
rc = cc_clk_on(drvdata);
if (rc) {
SSI_LOG_ERR("failed getting clock back on. We're toast.\n");
return rc;
}
rc = init_cc_regs(drvdata, false);
if (rc != 0) {
SSI_LOG_ERR("init_cc_regs (%x)\n", rc);
return rc;
}
rc = ssi_request_mgr_runtime_resume_queue(drvdata);
if (rc != 0) {
SSI_LOG_ERR("ssi_request_mgr_runtime_resume_queue (%x)\n", rc);
return rc;
}
/* must be after the queue resuming as it uses the HW queue*/
ssi_hash_init_sram_digest_consts(drvdata);
ssi_ivgen_init_sram_pool(drvdata);
return 0;
}
int ssi_power_mgr_runtime_get(struct device *dev)
{
int rc = 0;
if (ssi_request_mgr_is_queue_runtime_suspend(
(struct ssi_drvdata *)dev_get_drvdata(dev))) {
rc = pm_runtime_get_sync(dev);
} else {
pm_runtime_get_noresume(dev);
}
return rc;
}
int ssi_power_mgr_runtime_put_suspend(struct device *dev)
{
int rc = 0;
if (!ssi_request_mgr_is_queue_runtime_suspend(
(struct ssi_drvdata *)dev_get_drvdata(dev))) {
pm_runtime_mark_last_busy(dev);
rc = pm_runtime_put_autosuspend(dev);
} else {
/* Something wrong happens*/
BUG();
}
return rc;
}
#endif
int ssi_power_mgr_init(struct ssi_drvdata *drvdata)
{
int rc = 0;
#if defined(CONFIG_PM_RUNTIME) || defined(CONFIG_PM_SLEEP)
struct platform_device *plat_dev = drvdata->plat_dev;
/* must be before the enabling to avoid resdundent suspending */
pm_runtime_set_autosuspend_delay(&plat_dev->dev, SSI_SUSPEND_TIMEOUT);
pm_runtime_use_autosuspend(&plat_dev->dev);
/* activate the PM module */
rc = pm_runtime_set_active(&plat_dev->dev);
if (rc != 0)
return rc;
/* enable the PM module*/
pm_runtime_enable(&plat_dev->dev);
#endif
return rc;
}
void ssi_power_mgr_fini(struct ssi_drvdata *drvdata)
{
#if defined(CONFIG_PM_RUNTIME) || defined(CONFIG_PM_SLEEP)
struct platform_device *plat_dev = drvdata->plat_dev;
pm_runtime_disable(&plat_dev->dev);
#endif
}
|
