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cc8bbe1a YW |
1 | /* |
2 | * Copyright (c) 2015-2016 MediaTek Inc. | |
3 | * Author: Yong Wu <yong.wu@mediatek.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | #ifndef MTK_IOMMU_SMI_H | |
15 | #define MTK_IOMMU_SMI_H | |
16 | ||
17 | #include <linux/bitops.h> | |
18 | #include <linux/device.h> | |
19 | ||
20 | #ifdef CONFIG_MTK_SMI | |
21 | ||
22 | #define MTK_LARB_NR_MAX 8 | |
23 | ||
24 | #define MTK_SMI_MMU_EN(port) BIT(port) | |
25 | ||
26 | struct mtk_smi_larb_iommu { | |
27 | struct device *dev; | |
28 | unsigned int mmu; | |
29 | }; | |
30 | ||
31 | struct mtk_smi_iommu { | |
32 | unsigned int larb_nr; | |
33 | struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX]; | |
34 | }; | |
35 | ||
36 | /* | |
37 | * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter. | |
38 | * It also initialize some basic setting(like iommu). | |
39 | * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter. | |
40 | * Both should be called in non-atomic context. | |
41 | * | |
42 | * Returns 0 if successful, negative on failure. | |
43 | */ | |
44 | int mtk_smi_larb_get(struct device *larbdev); | |
45 | void mtk_smi_larb_put(struct device *larbdev); | |
46 | ||
47 | #else | |
48 | ||
49 | static inline int mtk_smi_larb_get(struct device *larbdev) | |
50 | { | |
51 | return 0; | |
52 | } | |
53 | ||
54 | static inline void mtk_smi_larb_put(struct device *larbdev) { } | |
55 | ||
56 | #endif | |
57 | ||
58 | #endif |