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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2019 Amlogic, Inc.
* Author: Jianxin Pan <jianxin.pan@amlogic.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <dt-bindings/power/meson-a1-power.h>
#include <dt-bindings/power/meson-s4-power.h>
#include <linux/arm-smccc.h>
#include <linux/firmware/meson/meson_sm.h>
#include <linux/module.h>
#define PWRC_ON 1
#define PWRC_OFF 0
struct meson_secure_pwrc_domain {
struct generic_pm_domain base;
unsigned int index;
struct meson_secure_pwrc *pwrc;
};
struct meson_secure_pwrc {
struct meson_secure_pwrc_domain *domains;
struct genpd_onecell_data xlate;
struct meson_sm_firmware *fw;
};
struct meson_secure_pwrc_domain_desc {
unsigned int index;
unsigned int flags;
char *name;
bool (*is_off)(struct meson_secure_pwrc_domain *pwrc_domain);
};
struct meson_secure_pwrc_domain_data {
unsigned int count;
struct meson_secure_pwrc_domain_desc *domains;
};
static bool pwrc_secure_is_off(struct meson_secure_pwrc_domain *pwrc_domain)
{
int is_off = 1;
if (meson_sm_call(pwrc_domain->pwrc->fw, SM_A1_PWRC_GET, &is_off,
pwrc_domain->index, 0, 0, 0, 0) < 0)
pr_err("failed to get power domain status\n");
return is_off;
}
static int meson_secure_pwrc_off(struct generic_pm_domain *domain)
{
int ret = 0;
struct meson_secure_pwrc_domain *pwrc_domain =
container_of(domain, struct meson_secure_pwrc_domain, base);
if (meson_sm_call(pwrc_domain->pwrc->fw, SM_A1_PWRC_SET, NULL,
pwrc_domain->index, PWRC_OFF, 0, 0, 0) < 0) {
pr_err("failed to set power domain off\n");
ret = -EINVAL;
}
return ret;
}
static int meson_secure_pwrc_on(struct generic_pm_domain *domain)
{
int ret = 0;
struct meson_secure_pwrc_domain *pwrc_domain =
container_of(domain, struct meson_secure_pwrc_domain, base);
if (meson_sm_call(pwrc_domain->pwrc->fw, SM_A1_PWRC_SET, NULL,
pwrc_domain->index, PWRC_ON, 0, 0, 0) < 0) {
pr_err("failed to set power domain on\n");
ret = -EINVAL;
}
return ret;
}
#define SEC_PD(__name, __flag) \
[PWRC_##__name##_ID] = \
{ \
.name = #__name, \
.index = PWRC_##__name##_ID, \
.is_off = pwrc_secure_is_off, \
.flags = __flag, \
}
static struct meson_secure_pwrc_domain_desc a1_pwrc_domains[] = {
SEC_PD(DSPA, 0),
SEC_PD(DSPB, 0),
/* UART should keep working in ATF after suspend and before resume */
SEC_PD(UART, GENPD_FLAG_ALWAYS_ON),
/* DMC is for DDR PHY ana/dig and DMC, and should be always on */
SEC_PD(DMC, GENPD_FLAG_ALWAYS_ON),
SEC_PD(I2C, 0),
SEC_PD(PSRAM, 0),
SEC_PD(ACODEC, 0),
SEC_PD(AUDIO, 0),
SEC_PD(OTP, 0),
SEC_PD(DMA, 0),
SEC_PD(SD_EMMC, 0),
SEC_PD(RAMA, 0),
/* SRAMB is used as ATF runtime memory, and should be always on */
SEC_PD(RAMB, GENPD_FLAG_ALWAYS_ON),
SEC_PD(IR, 0),
SEC_PD(SPICC, 0),
SEC_PD(SPIFC, 0),
SEC_PD(USB, 0),
/* NIC is for the Arm NIC-400 interconnect, and should be always on */
SEC_PD(NIC, GENPD_FLAG_ALWAYS_ON),
SEC_PD(PDMIN, 0),
SEC_PD(RSA, 0),
};
static struct meson_secure_pwrc_domain_desc s4_pwrc_domains[] = {
SEC_PD(S4_DOS_HEVC, 0),
SEC_PD(S4_DOS_VDEC, 0),
SEC_PD(S4_VPU_HDMI, 0),
SEC_PD(S4_USB_COMB, 0),
SEC_PD(S4_GE2D, 0),
/* ETH is for ethernet online wakeup, and should be always on */
SEC_PD(S4_ETH, GENPD_FLAG_ALWAYS_ON),
SEC_PD(S4_DEMOD, 0),
SEC_PD(S4_AUDIO, 0),
};
static int meson_secure_pwrc_probe(struct platform_device *pdev)
{
int i;
struct device_node *sm_np;
struct meson_secure_pwrc *pwrc;
const struct meson_secure_pwrc_domain_data *match;
match = of_device_get_match_data(&pdev->dev);
if (!match) {
dev_err(&pdev->dev, "failed to get match data\n");
return -ENODEV;
}
sm_np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gxbb-sm");
if (!sm_np) {
dev_err(&pdev->dev, "no secure-monitor node\n");
return -ENODEV;
}
pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL);
if (!pwrc)
return -ENOMEM;
pwrc->fw = meson_sm_get(sm_np);
of_node_put(sm_np);
if (!pwrc->fw)
return -EPROBE_DEFER;
pwrc->xlate.domains = devm_kcalloc(&pdev->dev, match->count,
sizeof(*pwrc->xlate.domains),
GFP_KERNEL);
if (!pwrc->xlate.domains)
return -ENOMEM;
pwrc->domains = devm_kcalloc(&pdev->dev, match->count,
sizeof(*pwrc->domains), GFP_KERNEL);
if (!pwrc->domains)
return -ENOMEM;
pwrc->xlate.num_domains = match->count;
platform_set_drvdata(pdev, pwrc);
for (i = 0 ; i < match->count ; ++i) {
struct meson_secure_pwrc_domain *dom = &pwrc->domains[i];
if (!match->domains[i].index)
continue;
dom->pwrc = pwrc;
dom->index = match->domains[i].index;
dom->base.name = match->domains[i].name;
dom->base.flags = match->domains[i].flags;
dom->base.power_on = meson_secure_pwrc_on;
dom->base.power_off = meson_secure_pwrc_off;
pm_genpd_init(&dom->base, NULL, match->domains[i].is_off(dom));
pwrc->xlate.domains[i] = &dom->base;
}
return of_genpd_add_provider_onecell(pdev->dev.of_node, &pwrc->xlate);
}
static struct meson_secure_pwrc_domain_data meson_secure_a1_pwrc_data = {
.domains = a1_pwrc_domains,
.count = ARRAY_SIZE(a1_pwrc_domains),
};
static struct meson_secure_pwrc_domain_data meson_secure_s4_pwrc_data = {
.domains = s4_pwrc_domains,
.count = ARRAY_SIZE(s4_pwrc_domains),
};
static const struct of_device_id meson_secure_pwrc_match_table[] = {
{
.compatible = "amlogic,meson-a1-pwrc",
.data = &meson_secure_a1_pwrc_data,
},
{
.compatible = "amlogic,meson-s4-pwrc",
.data = &meson_secure_s4_pwrc_data,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, meson_secure_pwrc_match_table);
static struct platform_driver meson_secure_pwrc_driver = {
.probe = meson_secure_pwrc_probe,
.driver = {
.name = "meson_secure_pwrc",
.of_match_table = meson_secure_pwrc_match_table,
},
};
module_platform_driver(meson_secure_pwrc_driver);
MODULE_LICENSE("Dual MIT/GPL");
|
