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@@ -1185,3 +1185,53 @@ int s3c2410_dma_getposition(enum dma_ch channel, dma_addr_t *src, dma_addr_t *ds
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if (dst != NULL)
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*dst = dma_rdreg(chan, S3C2410_DMA_DCDST);
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+
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+ return 0;
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+}
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+
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+EXPORT_SYMBOL(s3c2410_dma_getposition);
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+
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+/* system core operations */
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+
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+#ifdef CONFIG_PM
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+
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+static void s3c2410_dma_suspend_chan(struct s3c2410_dma_chan *cp)
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+{
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+ printk(KERN_DEBUG "suspending dma channel %d\n", cp->number);
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+
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+ if (dma_rdreg(cp, S3C2410_DMA_DMASKTRIG) & S3C2410_DMASKTRIG_ON) {
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+ /* the dma channel is still working, which is probably
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+ * a bad thing to do over suspend/resume. We stop the
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+ * channel and assume that the client is either going to
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+ * retry after resume, or that it is broken.
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+ */
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+
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+ printk(KERN_INFO "dma: stopping channel %d due to suspend\n",
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+ cp->number);
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+
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+ s3c2410_dma_dostop(cp);
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+ }
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+}
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+
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+static int s3c2410_dma_suspend(void)
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+{
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+ struct s3c2410_dma_chan *cp = s3c2410_chans;
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+ int channel;
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+
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+ for (channel = 0; channel < dma_channels; cp++, channel++)
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+ s3c2410_dma_suspend_chan(cp);
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+
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+ return 0;
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+}
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+
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+static void s3c2410_dma_resume_chan(struct s3c2410_dma_chan *cp)
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+{
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+ unsigned int no = cp->number | DMACH_LOW_LEVEL;
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+
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+ /* restore channel's hardware configuration */
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+
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+ if (!cp->in_use)
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+ return;
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+
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+ printk(KERN_INFO "dma%d: restoring configuration\n", cp->number);
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+
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