include/soc/mediatek/smi.h

   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
  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