mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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c4105c81c0
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7284 3c298f89-4303-0410-b956-a3cf2f4a3e73
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/**************************************************************************
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*
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* BRIEF MODULE DESCRIPTION
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* Definitions for DMA controller.
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*
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* Copyright 2004 IDT Inc. (rischelp@idt.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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**************************************************************************
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* May 2004 rkt, neb.
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*
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* Initial Release
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*
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*
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*
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**************************************************************************
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*/
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#ifndef __IDT_DMA_V_H__
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#define __IDT_DMA_V_H__
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#include <asm/idt-boards/rc32434/rc32434_dma.h>
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#include <asm/idt-boards/rc32434/rc32434.h>
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#define DMA_CHAN_OFFSET 0x14
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#define IS_DMA_USED(X) (((X) & (DMAD_f_m | DMAD_d_m | DMAD_t_m)) != 0)
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#define DMA_COUNT(count) \
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((count) & DMAD_count_m)
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#define DMA_HALT_TIMEOUT 500
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static inline int rc32434_halt_dma(DMA_Chan_t ch)
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{
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int timeout=1;
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if (rc32434_readl(&ch->dmac) & DMAC_run_m) {
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rc32434_writel(0, &ch->dmac);
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for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
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if (rc32434_readl(&ch->dmas) & DMAS_h_m) {
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rc32434_writel(0, &ch->dmas);
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break;
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}
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}
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}
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return timeout ? 0 : 1;
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}
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static inline void rc32434_start_dma(DMA_Chan_t ch, u32 dma_addr)
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{
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rc32434_writel(0, &ch->dmandptr);
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rc32434_writel(dma_addr, &ch->dmadptr);
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}
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static inline void rc32434_chain_dma(DMA_Chan_t ch, u32 dma_addr)
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{
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rc32434_writel(dma_addr, &ch->dmandptr);
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}
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#endif // __IDT_DMA_V_H__
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