LXR linux/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         8
  23
  24#define MTK_SMI_MMU_EN(port)    BIT(port)
  25
  26struct mtk_smi_larb_iommu {
  27        struct device *dev;
  28        unsigned int   mmu;
  29};
  30
  31struct 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 */
  44int mtk_smi_larb_get(struct device *larbdev);
  45void mtk_smi_larb_put(struct device *larbdev);
  46
  47#else
  48
  49static inline int mtk_smi_larb_get(struct device *larbdev)
  50{
  51        return 0;
  52}
  53
  54static inline void mtk_smi_larb_put(struct device *larbdev) { }
  55
  56#endif
  57
  58#endif
  59