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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7017996951
Add a simple rpmsg support for mt8183 SCP, that use IPI / IPC directly. Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org> Link: https://lore.kernel.org/r/20191112110330.179649-4-pihsun@chromium.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#ifndef __RPROC_MTK_COMMON_H
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#define __RPROC_MTK_COMMON_H
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/remoteproc.h>
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#include <linux/remoteproc/mtk_scp.h>
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#define MT8183_SW_RSTN 0x0
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#define MT8183_SW_RSTN_BIT BIT(0)
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#define MT8183_SCP_TO_HOST 0x1C
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#define MT8183_SCP_IPC_INT_BIT BIT(0)
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#define MT8183_SCP_WDT_INT_BIT BIT(8)
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#define MT8183_HOST_TO_SCP 0x28
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#define MT8183_HOST_IPC_INT_BIT BIT(0)
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#define MT8183_WDT_CFG 0x84
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#define MT8183_SCP_CLK_SW_SEL 0x4000
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#define MT8183_SCP_CLK_DIV_SEL 0x4024
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#define MT8183_SCP_SRAM_PDN 0x402C
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#define MT8183_SCP_L1_SRAM_PD 0x4080
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#define MT8183_SCP_TCM_TAIL_SRAM_PD 0x4094
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#define MT8183_SCP_CACHE_SEL(x) (0x14000 + (x) * 0x3000)
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#define MT8183_SCP_CACHE_CON MT8183_SCP_CACHE_SEL(0)
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#define MT8183_SCP_DCACHE_CON MT8183_SCP_CACHE_SEL(1)
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#define MT8183_SCP_CACHESIZE_8KB BIT(8)
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#define MT8183_SCP_CACHE_CON_WAYEN BIT(10)
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#define SCP_FW_VER_LEN 32
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#define SCP_SHARE_BUFFER_SIZE 288
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struct scp_run {
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u32 signaled;
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s8 fw_ver[SCP_FW_VER_LEN];
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u32 dec_capability;
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u32 enc_capability;
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wait_queue_head_t wq;
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};
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struct scp_ipi_desc {
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/* For protecting handler. */
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struct mutex lock;
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scp_ipi_handler_t handler;
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void *priv;
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};
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struct mtk_scp {
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struct device *dev;
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struct rproc *rproc;
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struct clk *clk;
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void __iomem *reg_base;
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void __iomem *sram_base;
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size_t sram_size;
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struct mtk_share_obj __iomem *recv_buf;
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struct mtk_share_obj __iomem *send_buf;
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struct scp_run run;
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/* To prevent multiple ipi_send run concurrently. */
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struct mutex send_lock;
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struct scp_ipi_desc ipi_desc[SCP_IPI_MAX];
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bool ipi_id_ack[SCP_IPI_MAX];
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wait_queue_head_t ack_wq;
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void __iomem *cpu_addr;
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phys_addr_t phys_addr;
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size_t dram_size;
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struct rproc_subdev *rpmsg_subdev;
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};
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/**
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* struct mtk_share_obj - SRAM buffer shared with AP and SCP
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*
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* @id: IPI id
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* @len: share buffer length
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* @share_buf: share buffer data
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*/
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struct mtk_share_obj {
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u32 id;
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u32 len;
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u8 share_buf[SCP_SHARE_BUFFER_SIZE];
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};
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void scp_memcpy_aligned(void __iomem *dst, const void *src, unsigned int len);
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void scp_ipi_lock(struct mtk_scp *scp, u32 id);
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void scp_ipi_unlock(struct mtk_scp *scp, u32 id);
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#endif
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