diff options
Diffstat (limited to 'arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h')
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h new file mode 100644 index 00000000000..e85fd946116 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h @@ -0,0 +1,89 @@ +/* + * linux/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h + * + * i.MX DMA registration and IRQ dispatching + * + * Copyright 2006 Pavel Pisa <pisa@cmp.felk.cvut.cz> + * Copyright 2008 Juergen Beisert, <kernel@pengutronix.de> + * Copyright 2008 Sascha Hauer, <s.hauer@pengutronix.de> + * + * 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. + */ + +#include <asm/dma.h> + +#ifndef __ASM_ARCH_MXC_DMA_H +#define __ASM_ARCH_MXC_DMA_H + +#define IMX_DMA_CHANNELS 16 + +#define DMA_BASE IO_ADDRESS(DMA_BASE_ADDR) + +#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, + dmamode_t dmamode); + +int +imx_dma_setup_sg(int channel, struct scatterlist *sg, + unsigned int sgcount, unsigned int dma_length, + unsigned int dev_addr, dmamode_t 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); + +enum imx_dma_prio { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 1, + DMA_PRIO_LOW = 2 +}; + +int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio); + +#endif /* _ASM_ARCH_MXC_DMA_H */ |