Subject: [PATCH v7 4/6] usb: musb: Add noirq type of dma create interface

From: <[email-masked]>
Date: Fri, 30 Aug 2019 16:20:24 +0800

From: Min Guo <[email-masked]>

Add noirq type of dma create interface for platform which do not
have dedicated DMA interrupt line, move musbhsdma macro definition
to musb_dma.h

Signed-off-by: Min Guo <[email-masked]>
---
changes in v7:
1. no changes

changes in v6:
1. no changes

changes in v5:
1. no changes

new patch based on v4:
---
 drivers/usb/musb/musb_dma.h  |  9 ++++++++
 drivers/usb/musb/musbhsdma.c | 54 ++++++++++++++++++++++++++++++--------------
 2 files changed, 46 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h
index 8f60271..05103ea 100644
--- a/drivers/usb/musb/musb_dma.h
+++ b/drivers/usb/musb/musb_dma.h
@@ -35,6 +35,12 @@
  *    whether shared with the Inventra core or separate.
  */
 
+#define MUSB_HSDMA_BASE		0x200
+#define MUSB_HSDMA_INTR		(MUSB_HSDMA_BASE + 0)
+#define MUSB_HSDMA_CONTROL		0x4
+#define MUSB_HSDMA_ADDRESS		0x8
+#define MUSB_HSDMA_COUNT		0xc
+
 #define	DMA_ADDR_INVALID	(~(dma_addr_t)0)
 
 #ifdef CONFIG_MUSB_PIO_ONLY
@@ -191,6 +197,9 @@ static inline void musb_dma_controller_destroy(struct dma_controller *d) { }
 extern struct dma_controller *
 musbhs_dma_controller_create(struct musb *musb, void __iomem *base);
 extern void musbhs_dma_controller_destroy(struct dma_controller *c);
+extern struct dma_controller *
+musbhs_dma_controller_create_noirq(struct musb *musb, void __iomem *base);
+extern irqreturn_t dma_controller_irq(int irq, void *private_data);
 
 extern struct dma_controller *
 tusb_dma_controller_create(struct musb *musb, void __iomem *base);
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index 5fc6825..d549c0b 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -10,12 +10,7 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include "musb_core.h"
-
-#define MUSB_HSDMA_BASE		0x200
-#define MUSB_HSDMA_INTR		(MUSB_HSDMA_BASE + 0)
-#define MUSB_HSDMA_CONTROL		0x4
-#define MUSB_HSDMA_ADDRESS		0x8
-#define MUSB_HSDMA_COUNT		0xc
+#include "musb_dma.h"
 
 #define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset)		\
 		(MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
@@ -268,7 +263,7 @@ static int dma_channel_abort(struct dma_channel *channel)
 	return 0;
 }
 
-static irqreturn_t dma_controller_irq(int irq, void *private_data)
+irqreturn_t dma_controller_irq(int irq, void *private_data)
 {
 	struct musb_dma_controller *controller = private_data;
 	struct musb *musb = controller->private_data;
@@ -383,6 +378,7 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
 	spin_unlock_irqrestore(&musb->lock, flags);
 	return retval;
 }
+EXPORT_SYMBOL_GPL(dma_controller_irq);
 
 void musbhs_dma_controller_destroy(struct dma_controller *c)
 {
@@ -398,18 +394,10 @@ void musbhs_dma_controller_destroy(struct dma_controller *c)
 }
 EXPORT_SYMBOL_GPL(musbhs_dma_controller_destroy);
 
-struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
-						    void __iomem *base)
+static struct musb_dma_controller *
+dma_controller_alloc(struct musb *musb, void __iomem *base)
 {
 	struct musb_dma_controller *controller;
-	struct device *dev = musb->controller;
-	struct platform_device *pdev = to_platform_device(dev);
-	int irq = platform_get_irq_byname(pdev, "dma");
-
-	if (irq <= 0) {
-		dev_err(dev, "No DMA interrupt line!\n");
-		return NULL;
-	}
 
 	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
 	if (!controller)
@@ -423,6 +411,25 @@ struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
 	controller->controller.channel_release = dma_channel_release;
 	controller->controller.channel_program = dma_channel_program;
 	controller->controller.channel_abort = dma_channel_abort;
+	return controller;
+}
+
+struct dma_controller *
+musbhs_dma_controller_create(struct musb *musb, void __iomem *base)
+{
+	struct musb_dma_controller *controller;
+	struct device *dev = musb->controller;
+	struct platform_device *pdev = to_platform_device(dev);
+	int irq = platform_get_irq_byname(pdev, "dma");
+
+	if (irq <= 0) {
+		dev_err(dev, "No DMA interrupt line!\n");
+		return NULL;
+	}
+
+	controller = dma_controller_alloc(musb, base);
+	if (!controller)
+		return NULL;
 
 	if (request_irq(irq, dma_controller_irq, 0,
 			dev_name(musb->controller), &controller->controller)) {
@@ -437,3 +444,16 @@ struct dma_controller *musbhs_dma_controller_create(struct musb *musb,
 	return &controller->controller;
 }
 EXPORT_SYMBOL_GPL(musbhs_dma_controller_create);
+
+struct dma_controller *
+musbhs_dma_controller_create_noirq(struct musb *musb, void __iomem *base)
+{
+	struct musb_dma_controller *controller;
+
+	controller = dma_controller_alloc(musb, base);
+	if (!controller)
+		return NULL;
+
+	return &controller->controller;
+}
+EXPORT_SYMBOL_GPL(musbhs_dma_controller_create_noirq);
-- 
1.9.1

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