[PATCH v5 4/6] usb: musb: Add noirq type of dma create interface

min.guo
2019-02-19T07:36:33Z

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 <min.guo@mediatek.com>
---
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 a688f7f..b2394a7 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;
@@ -382,6 +377,7 @@ 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)
{
@@ -397,18 +393,10 @@ 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)
@@ -422,6 +410,25 @@ 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)) {
@@ -436,3 +443,16 @@ 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