1 /**************************************************************************
3 * BRIEF MODULE DESCRIPTION
4 * Definitions for DMA controller.
6 * Copyright 2004 IDT Inc. (rischelp@idt.com)
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
16 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
19 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 675 Mass Ave, Cambridge, MA 02139, USA.
29 **************************************************************************
36 **************************************************************************
39 #ifndef __IDT_DMA_V_H__
40 #define __IDT_DMA_V_H__
42 #include <asm/idt-boards/rc32434/rc32434_dma.h>
43 #include <asm/idt-boards/rc32434/rc32434.h>
45 #define DMA_CHAN_OFFSET 0x14
46 #define IS_DMA_USED(X) (((X) & (DMAD_f_m | DMAD_d_m | DMAD_t_m)) != 0)
47 #define DMA_COUNT(count) \
48 ((count) & DMAD_count_m)
50 #define DMA_HALT_TIMEOUT 500
53 static inline int rc32434_halt_dma(DMA_Chan_t ch
)
56 if (rc32434_readl(&ch
->dmac
) & DMAC_run_m
) {
57 rc32434_writel(0, &ch
->dmac
);
59 for (timeout
= DMA_HALT_TIMEOUT
; timeout
> 0; timeout
--) {
60 if (rc32434_readl(&ch
->dmas
) & DMAS_h_m
) {
61 rc32434_writel(0, &ch
->dmas
);
68 return timeout
? 0 : 1;
71 static inline void rc32434_start_dma(DMA_Chan_t ch
, u32 dma_addr
)
73 rc32434_writel(0, &ch
->dmandptr
);
74 rc32434_writel(dma_addr
, &ch
->dmadptr
);
77 static inline void rc32434_chain_dma(DMA_Chan_t ch
, u32 dma_addr
)
79 rc32434_writel(dma_addr
, &ch
->dmandptr
);
82 #endif // __IDT_DMA_V_H__
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