/* * Copyright (c) 2013 Daisuke Aoyama * Copyright (c) 2013 Oleksandr Tymoshenko * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _BCM2835_DMA_H_ #define _BCM2835_DMA_H_ #define BCM_DMA_BLOCK_SIZE 512 /* DMA0-DMA15 but DMA15 is special */ #define BCM_DMA_CH_MAX 12 /* request CH for any nubmer */ #define BCM_DMA_CH_INVALID (-1) #define BCM_DMA_CH_ANY (-1) /* Peripheral DREQ Signals (4.2.1.3) */ #define BCM_DMA_DREQ_NONE 0 #define BCM_DMA_DREQ_EMMC 11 #define BCM_DMA_DREQ_SDHOST 13 #define BCM_DMA_SAME_ADDR 0 #define BCM_DMA_INC_ADDR 1 #define BCM_DMA_32BIT 0 #define BCM_DMA_128BIT 1 int bcm_dma_allocate(int req_ch); int bcm_dma_free(int ch); int bcm_dma_setup_intr(int ch, void (*func)(int, void *), void *arg); int bcm_dma_setup_src(int ch, int dreq, int inc_addr, int width); int bcm_dma_setup_dst(int ch, int dreq, int inc_addr, int width); int bcm_dma_start(int ch, vm_paddr_t src, vm_paddr_t dst, int len); uint32_t bcm_dma_length(int ch); #endif /* _BCM2835_DMA_H_ */