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usr
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src
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linux-headers-6.8.0-83-generic
/
arch
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mips
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include
/
asm
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jazzdma.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * Helpfile for jazzdma.c -- Mips Jazz R4030 DMA controller support */ #ifndef _ASM_JAZZDMA_H #define _ASM_JAZZDMA_H /* * Prototypes and macros */ extern unsigned long vdma_alloc(unsigned long paddr, unsigned long size); extern int vdma_free(unsigned long laddr); extern unsigned long vdma_phys2log(unsigned long paddr); extern unsigned long vdma_log2phys(unsigned long laddr); extern void vdma_stats(void); /* for debugging only */ extern void vdma_enable(int channel); extern void vdma_disable(int channel); extern void vdma_set_mode(int channel, int mode); extern void vdma_set_addr(int channel, long addr); extern void vdma_set_count(int channel, int count); extern int vdma_get_residue(int channel); extern int vdma_get_enable(int channel); /* * some definitions used by the driver functions */ #define VDMA_PAGESIZE 4096 #define VDMA_PGTBL_ENTRIES 4096 #define VDMA_PGTBL_SIZE (sizeof(VDMA_PGTBL_ENTRY) * VDMA_PGTBL_ENTRIES) #define VDMA_PAGE_EMPTY 0xff000000 /* * Macros to get page no. and offset of a given address * Note that VDMA_PAGE() works for physical addresses only */ #define VDMA_PAGE(a) ((unsigned int)(a) >> 12) #define VDMA_OFFSET(a) ((unsigned int)(a) & (VDMA_PAGESIZE-1)) /* * VDMA pagetable entry description */ typedef volatile struct VDMA_PGTBL_ENTRY { unsigned int frame; /* physical frame no. */ unsigned int owner; /* owner of this entry (0=free) */ } VDMA_PGTBL_ENTRY; /* * DMA channel control registers * in the R4030 MCT_ADR chip */ #define JAZZ_R4030_CHNL_MODE 0xE0000100 /* 8 DMA Channel Mode Registers, */ /* 0xE0000100,120,140... */ #define JAZZ_R4030_CHNL_ENABLE 0xE0000108 /* 8 DMA Channel Enable Regs, */ /* 0xE0000108,128,148... */ #define JAZZ_R4030_CHNL_COUNT 0xE0000110 /* 8 DMA Channel Byte Cnt Regs, */ /* 0xE0000110,130,150... */ #define JAZZ_R4030_CHNL_ADDR 0xE0000118 /* 8 DMA Channel Address Regs, */ /* 0xE0000118,138,158... */ /* channel enable register bits */ #define R4030_CHNL_ENABLE (1<<0) #define R4030_CHNL_WRITE (1<<1) #define R4030_TC_INTR (1<<8) #define R4030_MEM_INTR (1<<9) #define R4030_ADDR_INTR (1<<10) /* * Channel mode register bits */ #define R4030_MODE_ATIME_40 (0) /* device access time on remote bus */ #define R4030_MODE_ATIME_80 (1) #define R4030_MODE_ATIME_120 (2) #define R4030_MODE_ATIME_160 (3) #define R4030_MODE_ATIME_200 (4) #define R4030_MODE_ATIME_240 (5) #define R4030_MODE_ATIME_280 (6) #define R4030_MODE_ATIME_320 (7) #define R4030_MODE_WIDTH_8 (1<<3) /* device data bus width */ #define R4030_MODE_WIDTH_16 (2<<3) #define R4030_MODE_WIDTH_32 (3<<3) #define R4030_MODE_INTR_EN (1<<5) #define R4030_MODE_BURST (1<<6) /* Rev. 2 only */ #define R4030_MODE_FAST_ACK (1<<7) /* Rev. 2 only */ #endif /* _ASM_JAZZDMA_H */
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