diff options
Diffstat (limited to 'src/target/firmware/calypso/dma.c')
| -rw-r--r-- | src/target/firmware/calypso/dma.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/target/firmware/calypso/dma.c b/src/target/firmware/calypso/dma.c new file mode 100644 index 00000000..35c5be82 --- /dev/null +++ b/src/target/firmware/calypso/dma.c @@ -0,0 +1,44 @@ +/* Driver for Calypso DMA controller */ + +/* (C) 2010 by Harald Welte <laforge@gnumonks.org> + * + * All Rights Reserved + * + * 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 <memory.h> + +#define BASE_ADDR_DMA 0xfffffc00 + +enum dma_reg { + CONTROLLER_CONF = 0x00, + ALLOC_CONFIG = 0x02, +}; +#define DMA_REG(m) (BASE_ADDR_DMA + (m)) + +#define DMA_RAD(x) DMA_REG((x)*0x10 + 0x0) +#define DMA_RDPATH(x) DMA_REG((x)*0x10 + 0x2) +#define DMA_AAD(x) DMA_REG((x)*0x10 + 0x4) +#define DMA_ALGTH(x) DMA_REG((x)*0x10 + 0x6) +#define DMA_CTRL(x) DMA_REG((x)*0x10 + 0x8) +#define DMA_CUR_OFF_API(x) DMA_REG((x)*0x10 + 0xa) + +void dma_init(void) +{ + /* DMA 1 (RIF Tx), 2 (RIF Rx) allocated to DSP, all others to ARM */ + writew(0x000c, DMA_REG(ALLOC_CONFIG)); +} |