Merge remote-tracking branch 'asoc/fix/rcar' into asoc-linus

[deliverable/linux.git] / drivers / dma / imx-sdma.c

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 0f6fd42f55ca41975b12dbe267ef3aabdb81c017..03ec76fc22ff191423bc354e5b5005a621d83412 100644 (file)
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -18,6 +18,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/bitops.h>
@@ -385,6 +386,7 @@ struct sdma_engine {
        const struct sdma_driver_data   *drvdata;
        u32                             spba_start_addr;
        u32                             spba_end_addr;
+       unsigned int                    irq;
 };
 
 static struct sdma_driver_data sdma_imx31 = {
@@ -571,28 +573,20 @@ static void sdma_enable_channel(struct sdma_engine *sdma, int channel)
 static int sdma_run_channel0(struct sdma_engine *sdma)
 {
        int ret;
-       unsigned long timeout = 500;
+       u32 reg;
 
        sdma_enable_channel(sdma, 0);
 
-       while (!(ret = readl_relaxed(sdma->regs + SDMA_H_INTR) & 1)) {
-               if (timeout-- <= 0)
-                       break;
-               udelay(1);
-       }
-
-       if (ret) {
-               /* Clear the interrupt status */
-               writel_relaxed(ret, sdma->regs + SDMA_H_INTR);
-       } else {
+       ret = readl_relaxed_poll_timeout_atomic(sdma->regs + SDMA_H_STATSTOP,
+                                               reg, !(reg & 1), 1, 500);
+       if (ret)
                dev_err(sdma->dev, "Timeout waiting for CH0 ready\n");
-       }
 
        /* Set bits of CONFIG register with dynamic context switching */
        if (readl(sdma->regs + SDMA_H_CONFIG) == 0)
                writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG);
 
-       return ret ? 0 : -ETIMEDOUT;
+       return ret;
 }
 
 static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size,
@@ -727,9 +721,9 @@ static irqreturn_t sdma_int_handler(int irq, void *dev_id)
        unsigned long stat;
 
        stat = readl_relaxed(sdma->regs + SDMA_H_INTR);
-       /* not interested in channel 0 interrupts */
-       stat &= ~1;
        writel_relaxed(stat, sdma->regs + SDMA_H_INTR);
+       /* channel 0 is special and not handled here, see run_channel0() */
+       stat &= ~1;
 
        while (stat) {
                int channel = fls(stat) - 1;
@@ -758,7 +752,7 @@ static void sdma_get_pc(struct sdma_channel *sdmac,
         * These are needed once we start to support transfers between
         * two peripherals or memory-to-memory transfers
         */
-       int per_2_per = 0, emi_2_emi = 0;
+       int per_2_per = 0;
 
        sdmac->pc_from_device = 0;
        sdmac->pc_to_device = 0;
@@ -766,7 +760,6 @@ static void sdma_get_pc(struct sdma_channel *sdmac,
 
        switch (peripheral_type) {
        case IMX_DMATYPE_MEMORY:
-               emi_2_emi = sdma->script_addrs->ap_2_ap_addr;
                break;
        case IMX_DMATYPE_DSP:
                emi_2_per = sdma->script_addrs->bp_2_ap_addr;
@@ -999,8 +992,6 @@ static int sdma_config_channel(struct dma_chan *chan)
                } else
                        __set_bit(sdmac->event_id0, sdmac->event_mask);
 
-               /* Watermark Level */
-               sdmac->watermark_level |= sdmac->watermark_level;
                /* Address */
                sdmac->shp_addr = sdmac->per_address;
                sdmac->per_addr = sdmac->per_address2;
@@ -1715,6 +1706,8 @@ static int sdma_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
+       sdma->irq = irq;
+
        sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
        if (!sdma->script_addrs)
                return -ENOMEM;
@@ -1840,6 +1833,7 @@ static int sdma_remove(struct platform_device *pdev)
        struct sdma_engine *sdma = platform_get_drvdata(pdev);
        int i;
 
+       devm_free_irq(&pdev->dev, sdma->irq, sdma);
        dma_async_device_unregister(&sdma->dma_device);
        kfree(sdma->script_addrs);
        /* Kill the tasklet */