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
|
/** @file
This driver for SPI Device initialization
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Uefi.h>
#include <PiDxe.h>
#include <Protocol/Spi.h>
#include <Protocol/SpiDevice.h>
#include <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Guid/EventGroup.h>
#include "SpiDevice.h"
SPI_DEVICE_PROTOCOL mSpiDevProtocol = {
SpiRead,
SpiWrite,
SpiErase,
SpiLock,
SpiSetRange,
SpiLockRanges
};
VOID
EFIAPI
SpiDeviceVirtualAddressChangeEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// Update protocol pointer to the SPI Controller interface.
//
EfiConvertPointer (0x00, (VOID**) &(mSpiProtocol));
//
// Update the NV Storage location for runtime access.
//
EfiConvertPointer (0x00, (VOID**) &(mNvStorageBase));
//
// Take care of pointers in protocol.
//
EfiConvertPointer (0x00, (VOID**) &(mSpiDevProtocol.SpiRead));
EfiConvertPointer (0x00, (VOID**) &(mSpiDevProtocol.SpiWrite));
EfiConvertPointer (0x00, (VOID**) &(mSpiDevProtocol.SpiErase));
EfiConvertPointer (0x00, (VOID**) &(mSpiDevProtocol.SpiLock));
}
EFI_STATUS
EFIAPI
InitSpiDevice (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_EVENT Event;
CONST FLASH_PART_DESCRIPTION *FlashDescription;
UINT64 FlashSize;
EFI_HANDLE Handle;
EFI_STATUS Status;
mNvStorageBase = PcdGet32 (PcdFlashNvStorageVariableBase);
//
// Locate the SPI controller protocol and save it for later.
//
DEBUG((EFI_D_INFO, "Locating SPI Controller Protocol.\n"));
Status = gBS->LocateProtocol (
&gEfiSpiProtocolGuid,
NULL,
(VOID **) &mSpiProtocol
);
ASSERT_EFI_ERROR(Status);
//
// Loop through all the flash devices that are supported and see if one will
// initialize the SPI Controller interface.
//
FlashSize = FindFlashSupport (
&JedecIdRead,
NULL,
&FlashDescription
);
if (FlashSize == 0) {
DEBUG((EFI_D_ERROR, "No SPI flash part description found!\r\n"));
} else {
//
// Attempt to configure the SPI controller for this device.
//
DEBUG((EFI_D_INFO, "SPI flash size: %d MBytes\n", DivU64x32(FlashSize, 1024 * 1024 )));
DEBUG((EFI_D_INFO, "Configuring SPI Controller.\n"));
Status = SpiFlashInit (FlashDescription);
if (!EFI_ERROR (Status)) {
//
// Publish the SPI Device protocol.
//
DEBUG((EFI_D_INFO, "Installing SPI Device Protocol.\n"));
Handle = NULL;
Status = gBS->InstallMultipleProtocolInterfaces (
&Handle,
&gSpiDeviceProtocolGuid,
&mSpiDevProtocol,
NULL
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
//
// Make sure we can handle virtual address changes.
//
Event = NULL;
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
SpiDeviceVirtualAddressChangeEvent,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&Event
);
return EFI_SUCCESS;
}
}
//
// Unable to find a supported SPI device
//
DEBUG((EFI_D_ERROR, "Unable to configure SPI Controller for SPI device present.\n"));
return EFI_UNSUPPORTED;
}
BOOLEAN
ReadUsingMmio (
IN UINTN SpiOffset
)
{
return (BOOLEAN) ((SpiOffset >= BIOS_REGION_FLASH_OFFSET) && (SpiOffset < (BIOS_REGION_FLASH_OFFSET + PcdGet32 (PcdBiosImageSize))) && (!EfiAtRuntime ()));
}
|
