158 lines
3.9 KiB
C
158 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2018 MediaTek Inc.
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*/
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#ifndef _MTK_SCP_H
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#define _MTK_SCP_H
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#include <linux/platform_device.h>
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typedef void (*scp_ipi_handler_t) (void *data,
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unsigned int len,
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void *priv);
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/**
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* enum ipi_id - the id of inter-processor interrupt
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*
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* @SCP_IPI_INIT: The interrupt from scp is to notfiy kernel
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* SCP initialization completed.
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* IPI_SCP_INIT is sent from SCP when firmware is
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* loaded. AP doesn't need to send IPI_SCP_INIT
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* command to SCP.
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* For other IPI below, AP should send the request
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* to SCP to trigger the interrupt.
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* @SCP_IPI_MAX: The maximum IPI number
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*/
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enum scp_ipi_id {
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SCP_IPI_INIT = 0,
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SCP_IPI_VDEC_H264,
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SCP_IPI_VDEC_VP8,
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SCP_IPI_VDEC_VP9,
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SCP_IPI_VENC_H264,
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SCP_IPI_VENC_VP8,
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SCP_IPI_MDP,
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SCP_IPI_CROS_HOST_CMD,
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SCP_IPI_NS_SERVICE = 0xFF,
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SCP_IPI_MAX = 0x100,
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};
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/**
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* scp_ipi_register - register an ipi function
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*
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* @pdev: SCP platform device
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* @id: IPI ID
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* @handler: IPI handler
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* @priv: private data for IPI handler
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*
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* Register an ipi function to receive ipi interrupt from SCP.
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*
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* Return: Return 0 if ipi registers successfully, otherwise it is failed.
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*/
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int scp_ipi_register(struct platform_device *pdev,
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enum scp_ipi_id id,
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scp_ipi_handler_t handler,
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void *priv);
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/**
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* scp_ipi_unregister - unregister an ipi function
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*
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* @pdev: SCP platform device
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* @id: IPI ID
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*
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* Unregister an ipi function to receive ipi interrupt from SCP.
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*/
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void scp_ipi_unregister(struct platform_device *pdev, enum scp_ipi_id id);
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/**
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* scp_ipi_send - send data from AP to scp.
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*
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* @pdev: SCP platform device
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* @id: IPI ID
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* @buf: the data buffer
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* @len: the data buffer length
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* @wait: 1: need ack
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*
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* This function is thread-safe. When this function returns,
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* SCP has received the data and starts the processing.
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* When the processing completes, IPI handler registered
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* by scp_ipi_register will be called in interrupt context.
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*
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* Return: Return 0 if sending data successfully, otherwise it is failed.
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**/
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int scp_ipi_send(struct platform_device *pdev,
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enum scp_ipi_id id,
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void *buf,
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unsigned int len,
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unsigned int wait);
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/**
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* scp_get_pdev - get SCP's platform device
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*
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* @pdev: the platform device of the module requesting SCP platform
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* device for using SCP API.
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*
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* Return: Return NULL if it is failed.
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* otherwise it is SCP's platform device
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**/
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struct platform_device *scp_get_pdev(struct platform_device *pdev);
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/**
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* scp_get_vdec_hw_capa - get video decoder hardware capability
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*
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* @pdev: SCP platform device
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*
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* Return: video decoder hardware capability
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**/
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unsigned int scp_get_vdec_hw_capa(struct platform_device *pdev);
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/**
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* scp_get_venc_hw_capa - get video encoder hardware capability
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*
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* @pdev: SCP platform device
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*
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* Return: video encoder hardware capability
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**/
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unsigned int scp_get_venc_hw_capa(struct platform_device *pdev);
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/**
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* scp_mapping_dm_addr - Mapping SRAM/DRAM to kernel virtual address
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*
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* @pdev: SCP platform device
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* @mem_addr: SCP views memory address
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*
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* Mapping the SCP's SRAM address /
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* DMEM (Data Extended Memory) memory address /
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* Working buffer memory address to
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* kernel virtual address.
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*
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* Return: Return ERR_PTR(-EINVAL) if mapping failed,
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* otherwise the mapped kernel virtual address
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**/
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void *scp_mapping_dm_addr(struct platform_device *pdev,
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u32 mem_addr);
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#define SCP_RESERVED_MEM (1)
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#if SCP_RESERVED_MEM
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/* scp reserve memory ID definition*/
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enum scp_reserve_mem_id_t {
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SCP_ISP_MEM_ID,
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SCP_NUMS_MEM_ID,
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};
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struct scp_reserve_mblock {
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enum scp_reserve_mem_id_t num;
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u64 start_phys;
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u64 start_virt;
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u64 size;
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};
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extern phys_addr_t scp_get_reserve_mem_phys(enum scp_reserve_mem_id_t id);
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extern phys_addr_t scp_get_reserve_mem_virt(enum scp_reserve_mem_id_t id);
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extern phys_addr_t scp_get_reserve_mem_size(enum scp_reserve_mem_id_t id);
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#endif
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#endif /* _MTK_SCP_H */
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