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Viewing changes to dma/nwl_irq.c

  • Committer: Suren A. Chilingaryan
  • Date: 2011-07-18 14:42:51 UTC
  • Revision ID: csa@dside.dyndns.org-20110718144251-nmbl7xhcq00mfx1p
IRQ acknowledgement support in the engine API

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Lines of Context:
dma/nwl_irq.c
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    return 0;
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}
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// ACK
 
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int dma_nwl_acknowledge_irq(pcilib_dma_context_t *vctx, pcilib_irq_type_t irq_type, pcilib_irq_source_t irq_source) {
 
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    uint32_t val;
 
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    nwl_dma_t *ctx = (nwl_dma_t*)vctx;
 
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    pcilib_nwl_engine_description_t *info = ctx->engines + irq_source;
 
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    if (irq_type != PCILIB_DMA_IRQ) return PCILIB_ERROR_NOTSUPPORTED;
 
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    if (irq_source >= ctx->n_engines) return PCILIB_ERROR_NOTAVAILABLE;
 
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    nwl_read_register(val, ctx, info->base_addr, REG_DMA_ENG_CTRL_STATUS);
 
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    if (val & DMA_ENG_INT_ACTIVE_MASK) {
 
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        val |= DMA_ENG_ALLINT_MASK;
 
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        nwl_write_register(val, ctx, info->base_addr, REG_DMA_ENG_CTRL_STATUS);
 
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    }
 
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    return 0;
 
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}