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
|
/*
* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch_helpers.h>
#include <bakery_lock.h>
#include <mmio.h>
#include <debug.h>
#include "sunxi_def.h"
#include "mhu.h"
#include "scpi.h"
#if 1
void mhu_secure_message_start(void)
{
}
void mhu_secure_message_send(uint32_t command)
{
switch(command&0xf)
{
case SCPI_CMD_SCP_READY:
NOTICE("send cmd to scp: SCPI_CMD_SCP_READY\n");
break;
case SCPI_CMD_SET_CSS_POWER_STATE:
NOTICE("send cmd to scp: SCPI_CMD_SET_CSS_POWER_STATE\n");
break;
case SCPI_CMD_SYS_POWER_STATE:
NOTICE("send cmd to scp: SCPI_CMD_SYS_POWER_STATE\n");
break;
}
}
uint32_t mhu_secure_message_wait(void)
{
/* Wait for response from SCP */
return 1;
}
void mhu_secure_message_end(void)
{
}
void mhu_secure_init(void)
{
}
#else
/* SCP MHU secure channel registers */
#define SCP_INTR_S_STAT 0x200
#define SCP_INTR_S_SET 0x208
#define SCP_INTR_S_CLEAR 0x210
/* CPU MHU secure channel registers */
#define CPU_INTR_S_STAT 0x300
#define CPU_INTR_S_SET 0x308
#define CPU_INTR_S_CLEAR 0x310
static bakery_lock_t mhu_secure_lock __attribute__ ((section("tzfw_coherent_mem")));
void mhu_secure_message_start(void)
{
bakery_lock_get(&mhu_secure_lock);
/* Make sure any previous command has finished */
while (mmio_read_32(MHU_BASE + CPU_INTR_S_STAT) != 0)
;
}
void mhu_secure_message_send(uint32_t command)
{
/* Send command to SCP and wait for it to pick it up */
mmio_write_32(MHU_BASE + CPU_INTR_S_SET, command);
while (mmio_read_32(MHU_BASE + CPU_INTR_S_STAT) != 0)
;
}
uint32_t mhu_secure_message_wait(void)
{
/* Wait for response from SCP */
uint32_t response;
while (!(response = mmio_read_32(MHU_BASE + SCP_INTR_S_STAT)))
;
return response;
}
void mhu_secure_message_end(void)
{
/* Clear any response we got by writing all ones to the CLEAR register */
mmio_write_32(MHU_BASE + SCP_INTR_S_CLEAR, 0xffffffffu);
bakery_lock_release(&mhu_secure_lock);
}
void mhu_secure_init(void)
{
bakery_lock_init(&mhu_secure_lock);
/*
* Clear the CPU's INTR register to make sure we don't see a stale
* or garbage value and think it's a message we've already sent.
*/
mmio_write_32(MHU_BASE + CPU_INTR_S_CLEAR, 0xffffffffu);
}
#endif
|
