dw_dmac: introduce dwc_chan_disable
This piece of code is used often. Make it as a separate function. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.linux@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
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@ -217,6 +217,14 @@ static void dwc_dump_chan_regs(struct dw_dma_chan *dwc)
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channel_readl(dwc, CTL_LO));
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}
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static inline void dwc_chan_disable(struct dw_dma *dw, struct dw_dma_chan *dwc)
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{
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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}
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/*----------------------------------------------------------------------*/
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/* Called with dwc->lock held and bh disabled */
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@ -312,9 +320,7 @@ static void dwc_complete_all(struct dw_dma *dw, struct dw_dma_chan *dwc)
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"BUG: XFER bit set, but channel not idle!\n");
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/* Try to continue after resetting the channel... */
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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dwc_chan_disable(dw, dwc);
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}
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/*
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@ -396,9 +402,7 @@ static void dwc_scan_descriptors(struct dw_dma *dw, struct dw_dma_chan *dwc)
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"BUG: All descriptors done, but channel not idle!\n");
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/* Try to continue after resetting the channel... */
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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dwc_chan_disable(dw, dwc);
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if (!list_empty(&dwc->queue)) {
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list_move(dwc->queue.next, &dwc->active_list);
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@ -514,9 +518,7 @@ static void dwc_handle_cyclic(struct dw_dma *dw, struct dw_dma_chan *dwc,
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dwc_dump_chan_regs(dwc);
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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dwc_chan_disable(dw, dwc);
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/* make sure DMA does not restart by loading a new list */
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channel_writel(dwc, LLP, 0);
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@ -946,9 +948,7 @@ static int dwc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
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} else if (cmd == DMA_TERMINATE_ALL) {
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spin_lock_irqsave(&dwc->lock, flags);
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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dwc_chan_disable(dw, dwc);
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dwc->paused = false;
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@ -1156,9 +1156,7 @@ void dw_dma_cyclic_stop(struct dma_chan *chan)
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spin_lock_irqsave(&dwc->lock, flags);
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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dwc_chan_disable(dw, dwc);
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spin_unlock_irqrestore(&dwc->lock, flags);
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}
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@ -1336,9 +1334,7 @@ void dw_dma_cyclic_free(struct dma_chan *chan)
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spin_lock_irqsave(&dwc->lock, flags);
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channel_clear_bit(dw, CH_EN, dwc->mask);
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while (dma_readl(dw, CH_EN) & dwc->mask)
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cpu_relax();
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dwc_chan_disable(dw, dwc);
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dma_writel(dw, CLEAR.ERROR, dwc->mask);
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dma_writel(dw, CLEAR.XFER, dwc->mask);
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