From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- arch/arm/mach-imx/include/mach/dma-v1.h | 103 ++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 arch/arm/mach-imx/include/mach/dma-v1.h (limited to 'arch/arm/mach-imx/include/mach/dma-v1.h') diff --git a/arch/arm/mach-imx/include/mach/dma-v1.h b/arch/arm/mach-imx/include/mach/dma-v1.h new file mode 100644 index 00000000..ac6fd713 --- /dev/null +++ b/arch/arm/mach-imx/include/mach/dma-v1.h @@ -0,0 +1,103 @@ +/* + * linux/arch/arm/mach-imx/include/mach/dma-v1.h + * + * i.MX DMA registration and IRQ dispatching + * + * Copyright 2006 Pavel Pisa + * Copyright 2008 Juergen Beisert, + * Copyright 2008 Sascha Hauer, + * + * 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. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#ifndef __MACH_DMA_V1_H__ +#define __MACH_DMA_V1_H__ + +#define imx_has_dma_v1() (cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27()) + +#include + +#define IMX_DMA_CHANNELS 16 + +#define DMA_MODE_READ 0 +#define DMA_MODE_WRITE 1 +#define DMA_MODE_MASK 1 + +#define MX1_DMA_REG(offset) MX1_IO_ADDRESS(MX1_DMA_BASE_ADDR + (offset)) + +/* DMA Interrupt Mask Register */ +#define MX1_DMA_DIMR MX1_DMA_REG(0x08) + +/* Channel Control Register */ +#define MX1_DMA_CCR(x) MX1_DMA_REG(0x8c + ((x) << 6)) + +#define IMX_DMA_MEMSIZE_32 (0 << 4) +#define IMX_DMA_MEMSIZE_8 (1 << 4) +#define IMX_DMA_MEMSIZE_16 (2 << 4) +#define IMX_DMA_TYPE_LINEAR (0 << 10) +#define IMX_DMA_TYPE_2D (1 << 10) +#define IMX_DMA_TYPE_FIFO (2 << 10) + +#define IMX_DMA_ERR_BURST (1 << 0) +#define IMX_DMA_ERR_REQUEST (1 << 1) +#define IMX_DMA_ERR_TRANSFER (1 << 2) +#define IMX_DMA_ERR_BUFFER (1 << 3) +#define IMX_DMA_ERR_TIMEOUT (1 << 4) + +int +imx_dma_config_channel(int channel, unsigned int config_port, + unsigned int config_mem, unsigned int dmareq, int hw_chaining); + +void +imx_dma_config_burstlen(int channel, unsigned int burstlen); + +int +imx_dma_setup_single(int channel, dma_addr_t dma_address, + unsigned int dma_length, unsigned int dev_addr, + unsigned int dmamode); + + +/* + * Use this flag as the dma_length argument to imx_dma_setup_sg() + * to create an endless running dma loop. The end of the scatterlist + * must be linked to the beginning for this to work. + */ +#define IMX_DMA_LENGTH_LOOP ((unsigned int)-1) + +int +imx_dma_setup_sg(int channel, struct scatterlist *sg, + unsigned int sgcount, unsigned int dma_length, + unsigned int dev_addr, unsigned int dmamode); + +int +imx_dma_setup_handlers(int channel, + void (*irq_handler) (int, void *), + void (*err_handler) (int, void *, int), void *data); + +int +imx_dma_setup_progression_handler(int channel, + void (*prog_handler) (int, void*, struct scatterlist*)); + +void imx_dma_enable(int channel); + +void imx_dma_disable(int channel); + +int imx_dma_request(int channel, const char *name); + +void imx_dma_free(int channel); + +int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio); + +#endif /* __MACH_DMA_V1_H__ */ -- cgit v1.2.3