diff options
Diffstat (limited to 'sys/dev/ic/bcm2835_dmac.h')
| -rw-r--r-- | sys/dev/ic/bcm2835_dmac.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/sys/dev/ic/bcm2835_dmac.h b/sys/dev/ic/bcm2835_dmac.h new file mode 100644 index 00000000000..180b3648256 --- /dev/null +++ b/sys/dev/ic/bcm2835_dmac.h @@ -0,0 +1,126 @@ +/* $OpenBSD: bcm2835_dmac.h,v 1.1 2020/04/21 18:56:54 tobhe Exp $ */ + +/* + * Copyright (c) 2020 Tobias Heider <tobhe@openbsd.org> + * Copyright (c) 2019 Neil Ashford <ashfordneil0@gmail.com> + * + * 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 <jmcneill@invisible.ca> + * 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 */ |