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		16
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 
mtk_smi_larb_get(struct device * larbdev)49 static inline int mtk_smi_larb_get(struct device *larbdev)
50 {
51 	return 0;
52 }
53 
mtk_smi_larb_put(struct device * larbdev)54 static inline void mtk_smi_larb_put(struct device *larbdev) { }
55 
56 #endif
57 
58 #endif
59