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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/mips/include/asm/mach-rc32434/dma_v.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | arch/mips/include/asm/mach-rc32434/dma_v.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-rc32434/dma_v.h b/arch/mips/include/asm/mach-rc32434/dma_v.h new file mode 100644 index 000000000..37d73b987 --- /dev/null +++ b/arch/mips/include/asm/mach-rc32434/dma_v.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2002 Integrated Device Technology, Inc. + * All rights reserved. + * + * DMA register definition. + * + * Author : ryan.holmQVist@idt.com + * Date : 20011005 + */ + +#ifndef _ASM_RC32434_DMA_V_H_ +#define _ASM_RC32434_DMA_V_H_ + +#include <asm/mach-rc32434/dma.h> +#include <asm/mach-rc32434/rc32434.h> + +#define DMA_CHAN_OFFSET 0x14 +#define IS_DMA_USED(X) (((X) & \ + (DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \ + != 0) +#define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK) + +#define DMA_HALT_TIMEOUT 500 + +static inline int rc32434_halt_dma(struct dma_reg *ch) +{ + int timeout = 1; + if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) { + __raw_writel(0, &ch->dmac); + for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) { + if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) { + __raw_writel(0, &ch->dmas); + break; + } + } + } + + return timeout ? 0 : 1; +} + +static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr) +{ + __raw_writel(0, &ch->dmandptr); + __raw_writel(dma_addr, &ch->dmadptr); +} + +static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr) +{ + __raw_writel(dma_addr, &ch->dmandptr); +} + +#endif /* _ASM_RC32434_DMA_V_H_ */ |