1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * Copyright (c) 2015-2016 MediaTek Inc. 3 * Copyright (c) 2015-2016 MediaTek Inc.
4 * Author: Yong Wu <yong.wu@mediatek.com> 4 * Author: Yong Wu <yong.wu@mediatek.com>
5 */ 5 */
6 #ifndef MTK_IOMMU_SMI_H 6 #ifndef MTK_IOMMU_SMI_H
7 #define MTK_IOMMU_SMI_H 7 #define MTK_IOMMU_SMI_H
8 8
9 #include <linux/bitops.h> 9 #include <linux/bitops.h>
10 #include <linux/device.h> 10 #include <linux/device.h>
11 11
12 #if IS_ENABLED(CONFIG_MTK_SMI) 12 #if IS_ENABLED(CONFIG_MTK_SMI)
13 13
14 enum iommu_atf_cmd { <<
15 IOMMU_ATF_CMD_CONFIG_SMI_LARB, <<
16 IOMMU_ATF_CMD_CONFIG_INFRA_IOMMU, <<
17 IOMMU_ATF_CMD_MAX, <<
18 }; <<
19 <<
20 #define MTK_SMI_MMU_EN(port) BIT(port) 14 #define MTK_SMI_MMU_EN(port) BIT(port)
21 15
22 struct mtk_smi_larb_iommu { 16 struct mtk_smi_larb_iommu {
23 struct device *dev; 17 struct device *dev;
24 unsigned int mmu; 18 unsigned int mmu;
25 unsigned char bank[32]; 19 unsigned char bank[32];
26 }; 20 };
>> 21
>> 22 /*
>> 23 * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
>> 24 * It also initialize some basic setting(like iommu).
>> 25 * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
>> 26 * Both should be called in non-atomic context.
>> 27 *
>> 28 * Returns 0 if successful, negative on failure.
>> 29 */
>> 30 int mtk_smi_larb_get(struct device *larbdev);
>> 31 void mtk_smi_larb_put(struct device *larbdev);
>> 32
>> 33 #else
>> 34
>> 35 static inline int mtk_smi_larb_get(struct device *larbdev)
>> 36 {
>> 37 return 0;
>> 38 }
>> 39
>> 40 static inline void mtk_smi_larb_put(struct device *larbdev) { }
27 41
28 #endif 42 #endif
29 43
30 #endif 44 #endif
31 45
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