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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/unicore32/include/mach/dma.h | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/unicore32/include/mach/dma.h')
| -rw-r--r-- | arch/unicore32/include/mach/dma.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/unicore32/include/mach/dma.h b/arch/unicore32/include/mach/dma.h new file mode 100644 index 000000000..d655c1b6e --- /dev/null +++ b/arch/unicore32/include/mach/dma.h @@ -0,0 +1,48 @@ +/* + * linux/arch/unicore32/include/mach/dma.h + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * 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. + */ +#ifndef __MACH_PUV3_DMA_H__ +#define __MACH_PUV3_DMA_H__ + +/* + * The PKUnity has six internal DMA channels. + */ +#define MAX_DMA_CHANNELS 6 + +typedef enum { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 1, + DMA_PRIO_LOW = 2 +} puv3_dma_prio; + +/* + * DMA registration + */ + +extern int puv3_request_dma(char *name, + puv3_dma_prio prio, + void (*irq_handler)(int, void *), + void (*err_handler)(int, void *), + void *data); + +extern void puv3_free_dma(int dma_ch); + +static inline void puv3_stop_dma(int ch) +{ + writel(readl(DMAC_CONFIG(ch)) & ~DMAC_CONFIG_EN, DMAC_CONFIG(ch)); +} + +static inline void puv3_resume_dma(int ch) +{ + writel(readl(DMAC_CONFIG(ch)) | DMAC_CONFIG_EN, DMAC_CONFIG(ch)); +} + +#endif /* __MACH_PUV3_DMA_H__ */ |