Staging: vme: Enable drivers to handle more than one bridge

At the moment the vme bridge drivers are written in a way that only
allows them to support one bridge at a time. Modify the drivers to
enable more than one bridge to be present per board.
Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/vme/TODO

@@ -47,7 +47,6 @@ Bridge Support
 Tempe (tsi148)
 --------------
 
-- Driver can currently only support a single bridge.
 - 2eSST Broadcast mode.
 - Mailboxes unsupported.
 - Improve error detection.
@@ -58,7 +57,6 @@ Tempe (tsi148)
 Universe II (ca91c142)
 ----------------------
 
-- Driver can currently only support a single bridge.
 - DMA unsupported.
 - RMW transactions unsupported.
 - Location Monitors unsupported.

drivers/staging/vme/bridges/vme_ca91cx42.h

@@ -37,6 +37,22 @@
 #define CA91C142_MAX_DMA		1	/* Max DMA Controllers */
 #define CA91C142_MAX_MAILBOX		4	/* Max Mail Box registers */
 
+/* Structure used to hold driver specific information */
+struct ca91cx42_driver {
+	void *base;	/* Base Address of device registers */
+	wait_queue_head_t dma_queue;
+	wait_queue_head_t iack_queue;
+	wait_queue_head_t mbox_queue;
+	void (*lm_callback[4])(int);	/* Called in interrupt handler */
+	void *crcsr_kernel;
+	dma_addr_t crcsr_bus;
+	struct mutex vme_rmw;		/* Only one RMW cycle at a time */
+	struct mutex vme_int;		/*
+					 * Only one VME interrupt can be
+					 * generated at a time, provide locking
+					 */
+};
+
 /* See Page 2-77 in the Universe User Manual */
 struct ca91cx42_dma_descriptor {
 	unsigned int dctl;      /* DMA Control */

drivers/staging/vme/bridges/vme_tsi148.h

@@ -33,6 +33,22 @@
 #define TSI148_MAX_MAILBOX		4	/* Max Mail Box registers */
 #define TSI148_MAX_SEMAPHORE		8	/* Max Semaphores */
 
+/* Structure used to hold driver specific information */
+struct tsi148_driver {
+	void *base;	/* Base Address of device registers */
+	wait_queue_head_t dma_queue[2];
+	wait_queue_head_t iack_queue;
+	void (*lm_callback[4])(int);	/* Called in interrupt handler */
+	void *crcsr_kernel;
+	dma_addr_t crcsr_bus;
+	struct vme_master_resource *flush_image;
+	struct mutex vme_rmw;		/* Only one RMW cycle at a time */
+	struct mutex vme_int;		/*
+					 * Only one VME interrupt can be
+					 * generated at a time, provide locking
+					 */
+};
+
 /*
  * Layout of a DMAC Linked-List Descriptor
  *

drivers/staging/vme/vme.c

@@ -993,7 +993,7 @@ void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
 EXPORT_SYMBOL(vme_irq_handler);
 
 int vme_irq_request(struct device *dev, int level, int statid,
-	void (*callback)(int level, int vector, void *priv_data),
+	void (*callback)(int, int, void *),
 	void *priv_data)
 {
 	struct vme_bridge *bridge;
@@ -1027,7 +1027,7 @@ int vme_irq_request(struct device *dev, int level, int statid,
 	bridge->irq[level - 1].callback[statid].func = callback;
 
 	/* Enable IRQ level */
-	bridge->irq_set(level, 1, 1);
+	bridge->irq_set(bridge, level, 1, 1);
 
 	mutex_unlock(&(bridge->irq_mtx));
 
@@ -1061,7 +1061,7 @@ void vme_irq_free(struct device *dev, int level, int statid)
 
 	/* Disable IRQ level if no more interrupts attached at this level*/
 	if (bridge->irq[level - 1].count == 0)
-		bridge->irq_set(level, 0, 1);
+		bridge->irq_set(bridge, level, 0, 1);
 
 	bridge->irq[level - 1].callback[statid].func = NULL;
 	bridge->irq[level - 1].callback[statid].priv_data = NULL;
@@ -1090,7 +1090,7 @@ int vme_irq_generate(struct device *dev, int level, int statid)
 		return -EINVAL;
 	}
 
-	return bridge->irq_generate(level, statid);
+	return bridge->irq_generate(bridge, level, statid);
 }
 EXPORT_SYMBOL(vme_irq_generate);
 
@@ -1303,7 +1303,7 @@ int vme_slot_get(struct device *bus)
 		return -EINVAL;
 	}
 
-	return bridge->slot_get();
+	return bridge->slot_get(bridge);
 }
 EXPORT_SYMBOL(vme_slot_get);
 

drivers/staging/vme/vme_bridge.h

@@ -113,7 +113,7 @@ struct vme_bridge {
 
 	/* Bridge Info - XXX Move to private structure? */
 	struct device *parent;	/* Generic device struct (pdev->dev for PCI) */
-	void *base;		/* Base Address of device registers */
+	void *driver_priv;	/* Private pointer for the bridge driver */
 
 	struct device dev[VME_SLOTS_MAX];	/* Device registered with
 						 * device model on VME bus
@@ -152,8 +152,8 @@ struct vme_bridge {
 	int (*dma_list_empty) (struct vme_dma_list *);
 
 	/* Interrupt Functions */
-	void (*irq_set) (int, int, int);
-	int (*irq_generate) (int, int);
+	void (*irq_set) (struct vme_bridge *, int, int, int);
+	int (*irq_generate) (struct vme_bridge *, int, int);
 
 	/* Location monitor functions */
 	int (*lm_set) (struct vme_lm_resource *, unsigned long long,
@@ -164,7 +164,7 @@ struct vme_bridge {
 	int (*lm_detach) (struct vme_lm_resource *, int);
 
 	/* CR/CSR space functions */
-	int (*slot_get) (void);
+	int (*slot_get) (struct vme_bridge *);
 	/* Use standard master read and write functions to access CR/CSR */
 
 #if 0