musb: split out CPPI interrupt handler

As DaVinci DM646x has a dedicated CPPI DMA interrupt, replace
cppi_completion() (which has always been kind of layering
violation) by a complete CPPI interrupt handler.

[ dbrownell@users.sourceforge.net: only cppi_dma.c needs platform
device header, not cppi_dma.h ]

Signed-off-by: Dmitry Krivoschekov <dkrivoschekov@ru.mvista.com>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 10 deletions

diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 898b52fcff5d..6e14e06ff820 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -265,6 +265,7 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
         irqreturn_t     retval = IRQ_NONE;
         struct musb     *musb = __hci;
         void __iomem    *tibase = musb->ctrl_base;
+        struct cppi     *cppi;
         u32             tmp;
 
         spin_lock_irqsave(&musb->lock, flags);
@@ -281,16 +282,9 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
         /* CPPI interrupts share the same IRQ line, but have their own
          * mask, state, "vector", and EOI registers.
          */
-        if (is_cppi_enabled()) {
-                u32 cppi_tx = musb_readl(tibase, DAVINCI_TXCPPI_MASKED_REG);
-                u32 cppi_rx = musb_readl(tibase, DAVINCI_RXCPPI_MASKED_REG);
-
-                if (cppi_tx || cppi_rx) {
-                        DBG(4, "CPPI IRQ t%x r%x\n", cppi_tx, cppi_rx);
-                        cppi_completion(musb, cppi_rx, cppi_tx);
-                        retval = IRQ_HANDLED;
-                }
-        }
+        cppi = container_of(musb->dma_controller, struct cppi, controller);
+        if (is_cppi_enabled() && musb->dma_controller && !cppi->irq)
+                retval = cppi_interrupt(irq, __hci);
 
         /* ack and handle non-CPPI interrupts */
         tmp = musb_readl(tibase, DAVINCI_USB_INT_SRC_MASKED_REG);