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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Marvell, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <arch/io.h>
#include <console/console.h>
#include <soc/gic.h>
#include <soc/mcu.h>
static u8 mvmap2315_calc_checksum(const void *data, u32 size)
{
u8 csum;
const u8 *bytes = data;
int i;
for (i = csum = 0; i < size; i++)
csum += bytes[i];
return (~csum) & 0xFF;
}
void mcu_irq(void)
{
printk(BIOS_DEBUG, "waiting for MCU msg...\n");
while (!(read32(&mvmap2315_bcm_gicd->ispendr2) &
MVMAP2315_MCU_IPC_IRQ))
;
}
void send_mcu_msg(void *msg, u32 size)
{
printk(BIOS_DEBUG, "sending msg to MCU...\n");
write32(&mvmap2315_sp_ipc->wdr0, (u32)msg);
setbits_le32(&mvmap2315_sp_ipc->isrw, MVMAP2315_IPC_IRQSET_MSGSENT);
}
void *receive_mcu_msg(void)
{
void *msg;
printk(BIOS_DEBUG, "receiving msg to MCU...\n");
write32(&mvmap2315_sp_ipc->dummy, 0xA5A5A5A5);
switch (read32(&mvmap2315_sp_ipc->iir)) {
case MSG_READY:
msg = (void *)(read32(&mvmap2315_sp_ipc->rdr0)
+ MVMAP2315_MCU_MSG_OFFSET);
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGREADY);
setbits_le32(&mvmap2315_sp_ipc->isrw, MVMAP2315_IPC_IRQACK);
break;
case MSG_RECEIVED:
msg = NULL;
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGRECEIVED);
break;
case MSG_READY_RECEIVED:
msg = (void *)(read32(&mvmap2315_sp_ipc->rdr0)
+ MVMAP2315_MCU_MSG_OFFSET);
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGREADY);
setbits_le32(&mvmap2315_sp_ipc->icr,
MVMAP2315_IPC_IRQCLR_MSGRECEIVED);
setbits_le32(&mvmap2315_sp_ipc->isrw, MVMAP2315_IPC_IRQACK);
break;
default:
msg = NULL;
write32(&mvmap2315_sp_ipc->icr, read32(&mvmap2315_sp_ipc->iir));
break;
}
return msg;
}
void sned_hash_msg(u8 subcmd)
{
printk(BIOS_DEBUG, "requesting MCU hash...\n");
mvmap2315_mcu_msg_buff->protocol_version = 0x3;
mvmap2315_mcu_msg_buff->cmd_id = 0x2A;
mvmap2315_mcu_msg_buff->reserved0 = 0x0;
mvmap2315_mcu_msg_buff->length = 76;
mvmap2315_mcu_msg_buff->csum = 0;
mvmap2315_mcu_msg_buff->hash_subcmd = subcmd;
mvmap2315_mcu_msg_buff->hash_type = 0;
mvmap2315_mcu_msg_buff->nonce_size = 0;
mvmap2315_mcu_msg_buff->reserved1 = 0;
mvmap2315_mcu_msg_buff->offset = 0;
mvmap2315_mcu_msg_buff->size = 32;
mvmap2315_mcu_msg_buff->csum = mvmap2315_calc_checksum(
(void *)mvmap2315_mcu_msg_buff,
sizeof(struct sp_hash_request_msg));
send_mcu_msg((void *)mvmap2315_mcu_msg_buff,
sizeof(struct sp_hash_request_msg));
}
void *receive_hash_msg_respond(void)
{
struct mcu_hash_msg *mvmap2315_hash_msg_response;
printk(BIOS_DEBUG, "waiting for MCU hash response msg...\n");
mcu_irq();
mvmap2315_hash_msg_response = receive_mcu_msg();
mcu_irq();
receive_mcu_msg();
return mvmap2315_hash_msg_response;
}
|
