diff options
author | Lars-Peter Clausen <lars@metafoo.de> | 2010-06-19 04:08:14 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2010-08-05 13:26:15 +0100 |
commit | 68fcfe7f82f46cc2d0c28128afafbd3a3ff874f8 (patch) | |
tree | 52bf893dbf3321ed07677592d16dedcb232f9718 /arch/mips/include/asm | |
parent | a55f4506652cbdf23fa1b5fd509d4f3cc01e1843 (diff) | |
download | op-kernel-dev-68fcfe7f82f46cc2d0c28128afafbd3a3ff874f8.zip op-kernel-dev-68fcfe7f82f46cc2d0c28128afafbd3a3ff874f8.tar.gz |
MIPS: JZ4740: Add DMA support.
Add support for DMA transfers on JZ4740 SoCs.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1401/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm')
-rw-r--r-- | arch/mips/include/asm/mach-jz4740/dma.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-jz4740/dma.h b/arch/mips/include/asm/mach-jz4740/dma.h new file mode 100644 index 0000000..a3be121 --- /dev/null +++ b/arch/mips/include/asm/mach-jz4740/dma.h @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> + * JZ7420/JZ4740 DMA definitions + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#ifndef __ASM_MACH_JZ4740_DMA_H__ +#define __ASM_MACH_JZ4740_DMA_H__ + +struct jz4740_dma_chan; + +enum jz4740_dma_request_type { + JZ4740_DMA_TYPE_AUTO_REQUEST = 8, + JZ4740_DMA_TYPE_UART_TRANSMIT = 20, + JZ4740_DMA_TYPE_UART_RECEIVE = 21, + JZ4740_DMA_TYPE_SPI_TRANSMIT = 22, + JZ4740_DMA_TYPE_SPI_RECEIVE = 23, + JZ4740_DMA_TYPE_AIC_TRANSMIT = 24, + JZ4740_DMA_TYPE_AIC_RECEIVE = 25, + JZ4740_DMA_TYPE_MMC_TRANSMIT = 26, + JZ4740_DMA_TYPE_MMC_RECEIVE = 27, + JZ4740_DMA_TYPE_TCU = 28, + JZ4740_DMA_TYPE_SADC = 29, + JZ4740_DMA_TYPE_SLCD = 30, +}; + +enum jz4740_dma_width { + JZ4740_DMA_WIDTH_32BIT = 0, + JZ4740_DMA_WIDTH_8BIT = 1, + JZ4740_DMA_WIDTH_16BIT = 2, +}; + +enum jz4740_dma_transfer_size { + JZ4740_DMA_TRANSFER_SIZE_4BYTE = 0, + JZ4740_DMA_TRANSFER_SIZE_1BYTE = 1, + JZ4740_DMA_TRANSFER_SIZE_2BYTE = 2, + JZ4740_DMA_TRANSFER_SIZE_16BYTE = 3, + JZ4740_DMA_TRANSFER_SIZE_32BYTE = 4, +}; + +enum jz4740_dma_flags { + JZ4740_DMA_SRC_AUTOINC = 0x2, + JZ4740_DMA_DST_AUTOINC = 0x1, +}; + +enum jz4740_dma_mode { + JZ4740_DMA_MODE_SINGLE = 0, + JZ4740_DMA_MODE_BLOCK = 1, +}; + +struct jz4740_dma_config { + enum jz4740_dma_width src_width; + enum jz4740_dma_width dst_width; + enum jz4740_dma_transfer_size transfer_size; + enum jz4740_dma_request_type request_type; + enum jz4740_dma_flags flags; + enum jz4740_dma_mode mode; +}; + +typedef void (*jz4740_dma_complete_callback_t)(struct jz4740_dma_chan *, int, void *); + +struct jz4740_dma_chan *jz4740_dma_request(void *dev, const char *name); +void jz4740_dma_free(struct jz4740_dma_chan *dma); + +void jz4740_dma_configure(struct jz4740_dma_chan *dma, + const struct jz4740_dma_config *config); + + +void jz4740_dma_enable(struct jz4740_dma_chan *dma); +void jz4740_dma_disable(struct jz4740_dma_chan *dma); + +void jz4740_dma_set_src_addr(struct jz4740_dma_chan *dma, dma_addr_t src); +void jz4740_dma_set_dst_addr(struct jz4740_dma_chan *dma, dma_addr_t dst); +void jz4740_dma_set_transfer_count(struct jz4740_dma_chan *dma, uint32_t count); + +uint32_t jz4740_dma_get_residue(const struct jz4740_dma_chan *dma); + +void jz4740_dma_set_complete_cb(struct jz4740_dma_chan *dma, + jz4740_dma_complete_callback_t cb); + +#endif /* __ASM_JZ4740_DMA_H__ */ |