4 files changed, 80 insertions, 21 deletions

diff --git a/drivers/misc/mic/card/mic_device.c b/drivers/misc/mic/card/mic_device.c
index d0980ff..83819ee 100644
--- a/drivers/misc/mic/card/mic_device.c
+++ b/drivers/misc/mic/card/mic_device.c
@@ -83,8 +83,8 @@ static int mic_shutdown_init(void)
 	int shutdown_db;
 
 	shutdown_db = mic_next_card_db();
-	shutdown_cookie = mic_request_card_irq(mic_shutdown_isr,
-			"Shutdown", mdrv, shutdown_db);
+	shutdown_cookie = mic_request_card_irq(mic_shutdown_isr, NULL,
+					       "Shutdown", mdrv, shutdown_db);
 	if (IS_ERR(shutdown_cookie))
 		rc = PTR_ERR(shutdown_cookie);
 	else
@@ -136,7 +136,8 @@ static void mic_dp_uninit(void)
 /**
  * mic_request_card_irq - request an irq.
  *
- * @func: The callback function that handles the interrupt.
+ * @handler: interrupt handler passed to request_threaded_irq.
+ * @thread_fn: thread fn. passed to request_threaded_irq.
  * @name: The ASCII name of the callee requesting the irq.
  * @data: private data that is returned back when calling the
  * function handler.
@@ -149,17 +150,19 @@ static void mic_dp_uninit(void)
  * error code.
  *
  */
-struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
-	const char *name, void *data, int index)
+struct mic_irq *
+mic_request_card_irq(irq_handler_t handler,
+		     irq_handler_t thread_fn, const char *name,
+		     void *data, int index)
 {
 	int rc = 0;
 	unsigned long cookie;
 	struct mic_driver *mdrv = g_drv;
 
-	rc  = request_irq(mic_db_to_irq(mdrv, index), func,
-		0, name, data);
+	rc  = request_threaded_irq(mic_db_to_irq(mdrv, index), handler,
+				   thread_fn, 0, name, data);
 	if (rc) {
-		dev_err(mdrv->dev, "request_irq failed rc = %d\n", rc);
+		dev_err(mdrv->dev, "request_threaded_irq failed rc = %d\n", rc);
 		goto err;
 	}
 	mdrv->irq_info.irq_usage_count[index]++;
@@ -172,9 +175,9 @@ err:
 /**
  * mic_free_card_irq - free irq.
  *
- * @cookie: cookie obtained during a successful call to mic_request_irq
+ * @cookie: cookie obtained during a successful call to mic_request_threaded_irq
  * @data: private data specified by the calling function during the
- * mic_request_irq
+ * mic_request_threaded_irq
  *
  * returns: none.
  */
diff --git a/drivers/misc/mic/card/mic_device.h b/drivers/misc/mic/card/mic_device.h
index 306f502..844be8f 100644
--- a/drivers/misc/mic/card/mic_device.h
+++ b/drivers/misc/mic/card/mic_device.h
@@ -30,6 +30,8 @@
 #include <linux/workqueue.h>
 #include <linux/io.h>
 #include <linux/irqreturn.h>
+#include <linux/interrupt.h>
+#include <linux/mic_bus.h>
 
 /**
  * struct mic_intr_info - Contains h/w specific interrupt sources info
@@ -70,6 +72,7 @@ struct mic_device {
  * @hotplug_work: Hot plug work for adding/removing virtio devices.
  * @irq_info: The OS specific irq information
  * @intr_info: H/W specific interrupt information.
+ * @dma_mbdev: dma device on the MIC virtual bus.
  */
 struct mic_driver {
 	char name[20];
@@ -80,6 +83,7 @@ struct mic_driver {
 	struct work_struct hotplug_work;
 	struct mic_irq_info irq_info;
 	struct mic_intr_info intr_info;
+	struct mbus_device *dma_mbdev;
 };
 
 /**
@@ -116,8 +120,9 @@ mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
 int mic_driver_init(struct mic_driver *mdrv);
 void mic_driver_uninit(struct mic_driver *mdrv);
 int mic_next_card_db(void);
-struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
-	const char *name, void *data, int intr_src);
+struct mic_irq *
+mic_request_card_irq(irq_handler_t handler, irq_handler_t thread_fn,
+		     const char *name, void *data, int intr_src);
 void mic_free_card_irq(struct mic_irq *cookie, void *data);
 u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
 void mic_send_intr(struct mic_device *mdev, int doorbell);
diff --git a/drivers/misc/mic/card/mic_virtio.c b/drivers/misc/mic/card/mic_virtio.c
index 653799b..f14b600 100644
--- a/drivers/misc/mic/card/mic_virtio.c
+++ b/drivers/misc/mic/card/mic_virtio.c
@@ -417,7 +417,7 @@ static int mic_add_device(struct mic_device_desc __iomem *d,
 
 	virtio_db = mic_next_card_db();
 	mvdev->virtio_cookie = mic_request_card_irq(mic_virtio_intr_handler,
-			"virtio intr", mvdev, virtio_db);
+			NULL, "virtio intr", mvdev, virtio_db);
 	if (IS_ERR(mvdev->virtio_cookie)) {
 		ret = PTR_ERR(mvdev->virtio_cookie);
 		goto kfree;
@@ -606,8 +606,9 @@ int mic_devices_init(struct mic_driver *mdrv)
 	mic_scan_devices(mdrv, !REMOVE_DEVICES);
 
 	config_db = mic_next_card_db();
-	virtio_config_cookie = mic_request_card_irq(mic_extint_handler,
-			"virtio_config_intr", mdrv, config_db);
+	virtio_config_cookie = mic_request_card_irq(mic_extint_handler, NULL,
+						    "virtio_config_intr", mdrv,
+						    config_db);
 	if (IS_ERR(virtio_config_cookie)) {
 		rc = PTR_ERR(virtio_config_cookie);
 		goto exit;
diff --git a/drivers/misc/mic/card/mic_x100.c b/drivers/misc/mic/card/mic_x100.c
index 2868945..9d57545 100644
--- a/drivers/misc/mic/card/mic_x100.c
+++ b/drivers/misc/mic/card/mic_x100.c
@@ -148,6 +148,47 @@ void mic_card_unmap(struct mic_device *mdev, void __iomem *addr)
 	iounmap(addr);
 }
 
+static inline struct mic_driver *mbdev_to_mdrv(struct mbus_device *mbdev)
+{
+	return dev_get_drvdata(mbdev->dev.parent);
+}
+
+static struct mic_irq *
+_mic_request_threaded_irq(struct mbus_device *mbdev,
+			  irq_handler_t handler, irq_handler_t thread_fn,
+			  const char *name, void *data, int intr_src)
+{
+	int rc = 0;
+	unsigned int irq = intr_src;
+	unsigned long cookie = irq;
+
+	rc  = request_threaded_irq(irq, handler, thread_fn, 0, name, data);
+	if (rc) {
+		dev_err(mbdev_to_mdrv(mbdev)->dev,
+			"request_threaded_irq failed rc = %d\n", rc);
+		return ERR_PTR(rc);
+	}
+	return (struct mic_irq *)cookie;
+}
+
+static void _mic_free_irq(struct mbus_device *mbdev,
+			  struct mic_irq *cookie, void *data)
+{
+	unsigned long irq = (unsigned long)cookie;
+	free_irq(irq, data);
+}
+
+static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
+{
+	mic_ack_interrupt(&mbdev_to_mdrv(mbdev)->mdev);
+}
+
+static struct mbus_hw_ops mbus_hw_ops = {
+	.request_threaded_irq = _mic_request_threaded_irq,
+	.free_irq = _mic_free_irq,
+	.ack_interrupt = _mic_ack_interrupt,
+};
+
 static int __init mic_probe(struct platform_device *pdev)
 {
 	struct mic_driver *mdrv = &g_drv;
@@ -159,32 +200,41 @@ static int __init mic_probe(struct platform_device *pdev)
 
 	mdev->mmio.pa = MIC_X100_MMIO_BASE;
 	mdev->mmio.len = MIC_X100_MMIO_LEN;
-	mdev->mmio.va = ioremap(MIC_X100_MMIO_BASE, MIC_X100_MMIO_LEN);
+	mdev->mmio.va = devm_ioremap(&pdev->dev, MIC_X100_MMIO_BASE,
+				     MIC_X100_MMIO_LEN);
 	if (!mdev->mmio.va) {
 		dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
 		rc = -EIO;
 		goto done;
 	}
 	mic_hw_intr_init(mdrv);
+	platform_set_drvdata(pdev, mdrv);
+	mdrv->dma_mbdev = mbus_register_device(mdrv->dev, MBUS_DEV_DMA_MIC,
+					       NULL, &mbus_hw_ops,
+					       mdrv->mdev.mmio.va);
+	if (IS_ERR(mdrv->dma_mbdev)) {
+		rc = PTR_ERR(mdrv->dma_mbdev);
+		dev_err(&pdev->dev, "mbus_add_device failed rc %d\n", rc);
+		goto done;
+	}
 	rc = mic_driver_init(mdrv);
 	if (rc) {
 		dev_err(&pdev->dev, "mic_driver_init failed rc %d\n", rc);
-		goto iounmap;
+		goto remove_dma;
 	}
 done:
 	return rc;
-iounmap:
-	iounmap(mdev->mmio.va);
+remove_dma:
+	mbus_unregister_device(mdrv->dma_mbdev);
 	return rc;
 }
 
 static int mic_remove(struct platform_device *pdev)
 {
 	struct mic_driver *mdrv = &g_drv;
-	struct mic_device *mdev = &mdrv->mdev;
 
 	mic_driver_uninit(mdrv);
-	iounmap(mdev->mmio.va);
+	mbus_unregister_device(mdrv->dma_mbdev);
 	return 0;
 }