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1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
4 | Copyright (c) 2017, Linaro, Ltd. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #ifndef __EMBEDDED_GPIO_PPI_H__\r | |
17 | #define __EMBEDDED_GPIO_PPI_H__\r | |
18 | \r | |
19 | //\r | |
20 | // Protocol interface structure\r | |
21 | //\r | |
22 | typedef struct _EMBEDDED_GPIO_PPI EMBEDDED_GPIO_PPI;\r | |
23 | \r | |
24 | //\r | |
25 | // Data Types\r | |
26 | //\r | |
27 | typedef UINTN EMBEDDED_GPIO_PIN;\r | |
28 | \r | |
29 | #define GPIO(Port, Pin) ((EMBEDDED_GPIO_PIN)(((Port) << (16)) | (Pin)))\r | |
30 | #define GPIO_PIN(x) ((EMBEDDED_GPIO_PIN)(x) & (0xFFFF))\r | |
31 | #define GPIO_PORT(x) ((EMBEDDED_GPIO_PIN)(x) >> (16))\r | |
32 | \r | |
33 | typedef enum {\r | |
34 | GPIO_MODE_INPUT = 0x00,\r | |
35 | GPIO_MODE_OUTPUT_0 = 0x0E,\r | |
36 | GPIO_MODE_OUTPUT_1 = 0x0F,\r | |
37 | GPIO_MODE_SPECIAL_FUNCTION_2 = 0x02,\r | |
38 | GPIO_MODE_SPECIAL_FUNCTION_3 = 0x03,\r | |
39 | GPIO_MODE_SPECIAL_FUNCTION_4 = 0x04,\r | |
40 | GPIO_MODE_SPECIAL_FUNCTION_5 = 0x05,\r | |
41 | GPIO_MODE_SPECIAL_FUNCTION_6 = 0x06,\r | |
42 | GPIO_MODE_SPECIAL_FUNCTION_7 = 0x07\r | |
43 | } EMBEDDED_GPIO_MODE;\r | |
44 | \r | |
45 | typedef enum {\r | |
46 | GPIO_PULL_NONE,\r | |
47 | GPIO_PULL_UP,\r | |
48 | GPIO_PULL_DOWN\r | |
49 | } EMBEDDED_GPIO_PULL;\r | |
50 | \r | |
51 | //\r | |
52 | // Function Prototypes\r | |
53 | //\r | |
54 | \r | |
55 | /**\r | |
56 | \r | |
57 | Gets the state of a GPIO pin\r | |
58 | \r | |
59 | @param This Pointer to protocol\r | |
60 | @param Gpio Which pin to read\r | |
61 | @param Value State of the pin\r | |
62 | \r | |
63 | @retval EFI_SUCCESS GPIO state returned in Value\r | |
64 | @retval EFI_INVALID_PARAMETER Value is NULL\r | |
65 | @retval EFI_NOT_FOUND Pin does not exit\r | |
66 | \r | |
67 | **/\r | |
68 | typedef\r | |
69 | EFI_STATUS\r | |
70 | (EFIAPI *EMBEDDED_GPIO_GET) (\r | |
71 | IN EMBEDDED_GPIO_PPI *This,\r | |
72 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
73 | OUT UINTN *Value\r | |
74 | );\r | |
75 | \r | |
76 | /**\r | |
77 | \r | |
78 | Sets the state of a GPIO pin\r | |
79 | \r | |
80 | @param This Pointer to protocol\r | |
81 | @param Gpio Which pin to modify\r | |
82 | @param Mode Mode to set\r | |
83 | \r | |
84 | @retval EFI_SUCCESS GPIO set as requested\r | |
85 | @retval EFI_INVALID_PARAMETER Invalid mode\r | |
86 | @retval EFI_NOT_FOUND Pin does not exit\r | |
87 | \r | |
88 | **/\r | |
89 | typedef\r | |
90 | EFI_STATUS\r | |
91 | (EFIAPI *EMBEDDED_GPIO_SET) (\r | |
92 | IN EMBEDDED_GPIO_PPI *This,\r | |
93 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
94 | IN EMBEDDED_GPIO_MODE Mode\r | |
95 | );\r | |
96 | \r | |
97 | \r | |
98 | /**\r | |
99 | \r | |
100 | Gets the mode (function) of a GPIO pin\r | |
101 | \r | |
102 | @param This Pointer to protocol\r | |
103 | @param Gpio Which pin\r | |
104 | @param Mode Pointer to output mode value\r | |
105 | \r | |
106 | @retval EFI_SUCCESS Mode value retrieved\r | |
107 | @retval EFI_INVALID_PARAMETER Mode is NULL\r | |
108 | @retval EFI_NOT_FOUND Pin does not exit\r | |
109 | \r | |
110 | **/\r | |
111 | typedef\r | |
112 | EFI_STATUS\r | |
113 | (EFIAPI *EMBEDDED_GPIO_GET_MODE) (\r | |
114 | IN EMBEDDED_GPIO_PPI *This,\r | |
115 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
116 | OUT EMBEDDED_GPIO_MODE *Mode\r | |
117 | );\r | |
118 | \r | |
119 | \r | |
120 | /**\r | |
121 | \r | |
122 | Sets the pull-up / pull-down resistor of a GPIO pin\r | |
123 | \r | |
124 | @param This Pointer to PPI\r | |
125 | @param Gpio Port/pin index\r | |
126 | @param Pull The pullup/pulldown mode to set\r | |
127 | \r | |
128 | @retval EFI_SUCCESS Mode was set\r | |
129 | @retval EFI_NOT_FOUND Pin does not exist\r | |
130 | @retval EFI_UNSUPPORTED Action not supported\r | |
131 | \r | |
132 | **/\r | |
133 | typedef\r | |
134 | EFI_STATUS\r | |
135 | (EFIAPI *EMBEDDED_GPIO_SET_PULL) (\r | |
136 | IN EMBEDDED_GPIO_PPI *This,\r | |
137 | IN EMBEDDED_GPIO_PIN Gpio,\r | |
138 | IN EMBEDDED_GPIO_PULL Direction\r | |
139 | );\r | |
140 | \r | |
141 | \r | |
142 | struct _EMBEDDED_GPIO_PPI {\r | |
143 | EMBEDDED_GPIO_GET Get;\r | |
144 | EMBEDDED_GPIO_SET Set;\r | |
145 | EMBEDDED_GPIO_GET_MODE GetMode;\r | |
146 | EMBEDDED_GPIO_SET_PULL SetPull;\r | |
147 | };\r | |
148 | \r | |
149 | extern EFI_GUID gEmbeddedGpioPpiGuid;\r | |
150 | \r | |
151 | #endif\r |