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1e57a462 | 1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
3402aac7 | 4 | \r |
1e57a462 | 5 | This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <Uefi.h>\r | |
16 | \r | |
17 | #include <Library/IoLib.h>\r | |
18 | #include <Library/OmapLib.h>\r | |
19 | #include <Library/UefiBootServicesTableLib.h>\r | |
20 | \r | |
21 | #include <Protocol/EmbeddedGpio.h>\r | |
22 | \r | |
23 | #include <Omap3530/Omap3530.h>\r | |
24 | \r | |
25 | EFI_STATUS\r | |
26 | Get (\r | |
27 | IN EMBEDDED_GPIO *This,\r | |
28 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
29 | OUT UINTN *Value\r | |
30 | )\r | |
31 | {\r | |
32 | UINTN Port;\r | |
33 | UINTN Pin;\r | |
34 | UINT32 DataInRegister;\r | |
35 | \r | |
36 | if (Value == NULL)\r | |
37 | {\r | |
38 | return EFI_UNSUPPORTED;\r | |
39 | }\r | |
40 | \r | |
41 | Port = GPIO_PORT(Gpio);\r | |
42 | Pin = GPIO_PIN(Gpio);\r | |
43 | \r | |
44 | DataInRegister = GpioBase(Port) + GPIO_DATAIN;\r | |
45 | \r | |
46 | if (MmioRead32 (DataInRegister) & GPIO_DATAIN_MASK(Pin)) {\r | |
47 | *Value = 1;\r | |
48 | } else {\r | |
49 | *Value = 0;\r | |
50 | }\r | |
51 | \r | |
52 | return EFI_SUCCESS;\r | |
53 | }\r | |
54 | \r | |
55 | EFI_STATUS\r | |
56 | Set (\r | |
57 | IN EMBEDDED_GPIO *This,\r | |
58 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
59 | IN EMBEDDED_GPIO_MODE Mode\r | |
60 | )\r | |
61 | {\r | |
62 | UINTN Port;\r | |
63 | UINTN Pin;\r | |
64 | UINT32 OutputEnableRegister;\r | |
65 | UINT32 SetDataOutRegister;\r | |
66 | UINT32 ClearDataOutRegister;\r | |
67 | \r | |
68 | Port = GPIO_PORT(Gpio);\r | |
69 | Pin = GPIO_PIN(Gpio);\r | |
70 | \r | |
71 | OutputEnableRegister = GpioBase(Port) + GPIO_OE;\r | |
72 | SetDataOutRegister = GpioBase(Port) + GPIO_SETDATAOUT;\r | |
73 | ClearDataOutRegister = GpioBase(Port) + GPIO_CLEARDATAOUT;\r | |
74 | \r | |
75 | switch (Mode)\r | |
76 | {\r | |
77 | case GPIO_MODE_INPUT:\r | |
78 | MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_INPUT(Pin));\r | |
79 | break;\r | |
80 | \r | |
81 | case GPIO_MODE_OUTPUT_0:\r | |
82 | MmioWrite32 (ClearDataOutRegister, GPIO_CLEARDATAOUT_BIT(Pin));\r | |
83 | MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));\r | |
84 | break;\r | |
85 | \r | |
86 | case GPIO_MODE_OUTPUT_1:\r | |
87 | MmioWrite32 (SetDataOutRegister, GPIO_SETDATAOUT_BIT(Pin));\r | |
88 | MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));\r | |
89 | break;\r | |
90 | \r | |
91 | default:\r | |
92 | return EFI_UNSUPPORTED;\r | |
93 | }\r | |
94 | \r | |
95 | return EFI_SUCCESS;\r | |
96 | }\r | |
97 | \r | |
98 | EFI_STATUS\r | |
99 | GetMode (\r | |
100 | IN EMBEDDED_GPIO *This,\r | |
101 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
102 | OUT EMBEDDED_GPIO_MODE *Mode\r | |
103 | )\r | |
104 | {\r | |
105 | return EFI_UNSUPPORTED;\r | |
106 | }\r | |
107 | \r | |
108 | EFI_STATUS\r | |
109 | SetPull (\r | |
110 | IN EMBEDDED_GPIO *This,\r | |
111 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
112 | IN EMBEDDED_GPIO_PULL Direction\r | |
113 | )\r | |
114 | {\r | |
115 | return EFI_UNSUPPORTED;\r | |
116 | }\r | |
117 | \r | |
118 | EMBEDDED_GPIO Gpio = {\r | |
119 | Get,\r | |
120 | Set,\r | |
121 | GetMode,\r | |
122 | SetPull\r | |
123 | };\r | |
124 | \r | |
125 | EFI_STATUS\r | |
126 | GpioInitialize (\r | |
127 | IN EFI_HANDLE ImageHandle,\r | |
128 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
129 | )\r | |
130 | {\r | |
131 | EFI_STATUS Status;\r | |
3402aac7 | 132 | \r |
1e57a462 | 133 | Status = gBS->InstallMultipleProtocolInterfaces(&ImageHandle, &gEmbeddedGpioProtocolGuid, &Gpio, NULL);\r |
134 | return Status;\r | |
135 | }\r |