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MIPS: JZ4740: Add DMA support.

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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>
This commit is contained in:
Lars-Peter Clausen 2010-06-19 04:08:14 +00:00 • committed by Ralf Baechle
parent a55f450665
commit 68fcfe7f82
2 changed files with 379 additions and 0 deletions
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90
arch/mips/include/asm/mach-jz4740/dma.h Normal file
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/*
* 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__ */