/* $OpenBSD: bcm2835_dmac.h,v 1.1 2020/04/21 18:56:54 tobhe Exp $ */ /* * Copyright (c) 2020 Tobias Heider * Copyright (c) 2019 Neil Ashford * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /*- * Copyright (c) 2014 Jared D. McNeill * All rights reserved. * * 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 ``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 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. */ #ifndef BCM2835_DMAC_H #define BCM2835_DMAC_H #define DMAC_CS(n) (0x00 + (0x100 * (n))) #define DMAC_CS_RESET (1<<31) #define DMAC_CS_ABORT (1<<30) #define DMAC_CS_DISDEBUG (1<<29) #define DMAC_CS_WAIT_FOR_OUTSTANDING_WRITES (1<<28) #define DMAC_CS_PANIC_PRIORITY (((1<<24) - 1) ^ (1<<20)) #define DMAC_CS_PRIORITY (((1<<20) - 1) ^ (1<<16)) #define DMAC_CS_ERROR (1<<8) #define DMAC_CS_WAITING_FOR_OUTSTANDING_WRITES (1<<6) #define DMAC_CS_DREQ_STOPS_DMA (1<<5) #define DMAC_CS_PAUSED (1<<4) #define DMAC_CS_DREQ (1<<3) #define DMAC_CS_INT (1<<2) #define DMAC_CS_END (1<<1) #define DMAC_CS_ACTIVE (1<<0) #define DMAC_CS_INTMASK (DMAC_CS_INT|DMAC_CS_END) #define DMAC_CONBLK_AD(n) (0x04 + (0x100 * (n))) #define DMAC_TI(n) (0x08 + (0x100 * (n))) #define DMAC_SOURCE_AD(n) (0x0c + (0x100 * (n))) #define DMAC_DEST_AD(n) (0x10 + (0x100 * (n))) #define DMAC_TXFR_LEN(n) (0x14 + (0x100 * (n))) #define DMAC_STRIDE(n) (0x18 + (0x100 * (n))) #define DMAC_NEXTCONBK(n) (0x1c + (0x100 * (n))) #define DMAC_DEBUG(n) (0x20 + (0x100 * (n))) #define DMAC_DEBUG_LITE (1<<28) #define DMAC_DEBUG_VERSION (((1<<28) - 1) ^ (1<<25)) #define DMAC_DEBUG_DMA_STATE (((1<<25) - 1) ^ (1<<16)) #define DMAC_DEBUG_DMA_ID (((1<<16) - 1) ^ (1<<8)) #define DMAC_DEBUG_OUTSTANDING_WRITES (((1<<8) - 1) ^ (1<<4)) #define DMAC_DEBUG_READ_ERROR (1<<2) #define DMAC_DEBUG_FIFO_ERROR (1<<1) #define DMAC_DEBUG_READ_LAST_NOT_SET_ERROR (1<<0) struct bcmdmac_conblk { uint32_t cb_ti; #define DMAC_TI_NO_WIDE_BURSTS (1 << 26) #define DMAC_TI_WAITS (((1 << 26) - 1) ^ (1 << 21)) #define DMAC_TI_PERMAP (((1 << 21) - 1) ^ (1 << 16)) #define DMAC_TI_PERMAP_BASE (1 << 16) #define DMAC_TI_BURST_LENGTH (((1 << 16) - 1) ^ (1 << 12)) #define DMAC_TI_SRC_IGNORE (1 << 11) #define DMAC_TI_SRC_DREQ (1 << 10) #define DMAC_TI_SRC_WIDTH (1 << 9) #define DMAC_TI_SRC_INC (1 << 8) #define DMAC_TI_DEST_IGNORE (1 << 7) #define DMAC_TI_DEST_DREQ (1 << 6) #define DMAC_TI_DEST_WIDTH (1 << 5) #define DMAC_TI_DEST_INC (1 << 4) #define DMAC_TI_WAIT_RESP (1 << 3) #define DMAC_TI_TDMODE (1 << 1) #define DMAC_TI_INTEN (1 << 0) uint32_t cb_source_ad; uint32_t cb_dest_ad; uint32_t cb_txfr_len; #define DMAC_TXFR_LEN_YLENGTH (((1 << 30) - 1) ^ (1 << 16)) #define DMAC_TXFR_LEN_XLENGTH (((1 << 16) - 1) ^ (1 << 0)) uint32_t cb_stride; #define DMAC_STRIDE_D_STRIDE (((1 << 32) - 1) ^ (1 << 16)) #define DMAC_STRIDE_S_STRIDE (((1 << 16) - 1) ^ (1 << 0)) uint32_t cb_nextconbk; uint32_t cb_padding[2]; } __packed; #define DMAC_INT_STATUS 0xfe0 #define DMAC_ENABLE 0xff0 enum bcmdmac_type { BCMDMAC_TYPE_NORMAL, BCMDMAC_TYPE_LITE }; struct bcmdmac_channel; struct bcmdmac_channel *bcmdmac_alloc(enum bcmdmac_type, int, void (*)(uint32_t, uint32_t, void *), void *); void bcmdmac_free(struct bcmdmac_channel *); void bcmdmac_set_conblk_addr(struct bcmdmac_channel *, bus_addr_t); int bcmdmac_transfer(struct bcmdmac_channel *); void bcmdmac_halt(struct bcmdmac_channel *); #endif /* BCM2835_DMAC_H */