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author | Yong Wu <yong.wu@mediatek.com> | 2016-02-23 01:20:49 +0800 |
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committer | Joerg Roedel <jroedel@suse.de> | 2016-02-25 16:49:08 +0100 |
commit | cc8bbe1a83128ad06457e4dc69907c4f9a6fc1a7 (patch) | |
tree | e9ba4a6dfce5064c0a7f153fba91f902b11fc517 /include/soc/mediatek | |
parent | fb6e2ceee3e634e42405d9b47080ed21442964d9 (diff) | |
download | linux-cc8bbe1a83128ad06457e4dc69907c4f9a6fc1a7.tar.gz linux-cc8bbe1a83128ad06457e4dc69907c4f9a6fc1a7.tar.bz2 linux-cc8bbe1a83128ad06457e4dc69907c4f9a6fc1a7.zip |
memory: mediatek: Add SMI driver
This patch add SMI(Smart Multimedia Interface) driver. This driver
is responsible to enable/disable iommu and control the power domain
and clocks of each local arbiter.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/soc/mediatek')
-rw-r--r-- | include/soc/mediatek/smi.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/include/soc/mediatek/smi.h b/include/soc/mediatek/smi.h new file mode 100644 index 000000000000..8893c5eacd07 --- /dev/null +++ b/include/soc/mediatek/smi.h @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2015-2016 MediaTek Inc. + * Author: Yong Wu <yong.wu@mediatek.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef MTK_IOMMU_SMI_H +#define MTK_IOMMU_SMI_H + +#include <linux/bitops.h> +#include <linux/device.h> + +#ifdef CONFIG_MTK_SMI + +#define MTK_LARB_NR_MAX 8 + +#define MTK_SMI_MMU_EN(port) BIT(port) + +struct mtk_smi_larb_iommu { + struct device *dev; + unsigned int mmu; +}; + +struct mtk_smi_iommu { + unsigned int larb_nr; + struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX]; +}; + +/* + * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter. + * It also initialize some basic setting(like iommu). + * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter. + * Both should be called in non-atomic context. + * + * Returns 0 if successful, negative on failure. + */ +int mtk_smi_larb_get(struct device *larbdev); +void mtk_smi_larb_put(struct device *larbdev); + +#else + +static inline int mtk_smi_larb_get(struct device *larbdev) +{ + return 0; +} + +static inline void mtk_smi_larb_put(struct device *larbdev) { } + +#endif + +#endif |