Re: [PATCH 08/11] dmaengine: cppi41: Implement the glue for da8xx

This is add the glue layer required to make it work on da8xx,
as well some changes in driver (e.g to manage clock).

Signed-off-by: Alexandre Bailon <abailon-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
---
 drivers/dma/cppi41.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index 939398e..4318e53 100644
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c

@@ -86,10 +87,19 @@

 #define USBSS_IRQ_PD_COMP	(1 <<  2)

+/* USB DA8XX */
+#define DA8XX_INTR_SRC_MASKED	0x38
+#define DA8XX_END_OF_INTR	0x3c
+
+#define DA8XX_QMGR_PENDING_MASK	(0xf << 24)
+
+
+

 /* Packet Descriptor */
 #define PD2_ZERO_LENGTH		(1 << 19)

 #define AM335X_CPPI41		0
+#define DA8XX_CPPI41		1

 struct cppi41_channel {
 	struct dma_chan chan;

@@ -366,6 +393,26 @@ static irqreturn_t am335x_cppi41_irq(int irq, void *data)
 	return cppi41_irq(cdd);
 }

+static irqreturn_t da8xx_cppi41_irq(int irq, void *data)
+{
+	struct cppi41_dd *cdd = data;
+	u32 status;
+	u32 usbss_status;
+
+	status = cppi_readl(cdd->qmgr_mem + QMGR_PEND(0));
+	if (status & DA8XX_QMGR_PENDING_MASK)
+		cppi41_irq(cdd);
+	else
+		return IRQ_NONE;

+
+	/* Re-assert IRQ if there no usb core interrupts pending */
+	usbss_status = cppi_readl(cdd->usbss_mem + DA8XX_INTR_SRC_MASKED);
+	if (!usbss_status)
+		cppi_writel(0, cdd->usbss_mem + DA8XX_END_OF_INTR);

+
+	return IRQ_HANDLED;
+}
+
 static dma_cookie_t cppi41_tx_submit(struct dma_async_tx_descriptor *tx)
 {
 	dma_cookie_t cookie;