[PATCH] superhyway: multiple block support and VCR rework

This extends the API somewhat to allow for platform-specific VCR reading and
writing.  Some platforms (like SH4-202) implement the VCR in a split VCRL and
VCRH, but end up being in reverse order or have other quirks that need to be
dealt with, so we add a set of superhyway_ops per-bus to accomodate this.

We also have to extend the per-device resources somewhat, as some devices now
conveniently split control and data blocks.  So we allow a platform to
register its set of SuperHyway devices via superhyway_add_devices() with the
control block always ordered as the first resource (as this is the one that
userspace cares about).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 33 insertions, 5 deletions

diff --git a/include/linux/superhyway.h b/include/linux/superhyway.h
index c906c5a0aae..17ea468fa36 100644
--- a/include/linux/superhyway.h
+++ b/include/linux/superhyway.h
@@ -19,7 +19,7 @@
  */
 #define SUPERHYWAY_DEVICE_ID_SH5_DMAC	0x0183
 
-struct vcr_info {
+struct superhyway_vcr_info {
 	u8	perr_flags;	/* P-port Error flags */
 	u8	merr_flags;	/* Module Error flags */
 	u16	mod_vers;	/* Module Version */
@@ -28,6 +28,17 @@ struct vcr_info {
 	u8	top_mb;		/* Top Memory block */
 };
 
+struct superhyway_ops {
+	int (*read_vcr)(unsigned long base, struct superhyway_vcr_info *vcr);
+	int (*write_vcr)(unsigned long base, struct superhyway_vcr_info vcr);
+};
+
+struct superhyway_bus {
+	struct superhyway_ops *ops;
+};
+
+extern struct superhyway_bus superhyway_channels[];
+
 struct superhyway_device_id {
 	unsigned int id;
 	unsigned long driver_data;
@@ -55,9 +66,11 @@ struct superhyway_device {
 
 	struct superhyway_device_id id;
 	struct superhyway_driver *drv;
+	struct superhyway_bus *bus;
 
-	struct resource resource;
-	struct vcr_info vcr;
+	int num_resources;
+	struct resource *resource;
+	struct superhyway_vcr_info vcr;
 };
 
 #define to_superhyway_device(d)	container_of((d), struct superhyway_device, dev)
@@ -65,12 +78,27 @@ struct superhyway_device {
 #define superhyway_get_drvdata(d)	dev_get_drvdata(&(d)->dev)
 #define superhyway_set_drvdata(d,p)	dev_set_drvdata(&(d)->dev, (p))
 
-extern int superhyway_scan_bus(void);
+static inline int
+superhyway_read_vcr(struct superhyway_device *dev, unsigned long base,
+		    struct superhyway_vcr_info *vcr)
+{
+	return dev->bus->ops->read_vcr(base, vcr);
+}
+
+static inline int
+superhyway_write_vcr(struct superhyway_device *dev, unsigned long base,
+		     struct superhyway_vcr_info vcr)
+{
+	return dev->bus->ops->write_vcr(base, vcr);
+}
+
+extern int superhyway_scan_bus(struct superhyway_bus *);
 
 /* drivers/sh/superhyway/superhyway.c */
 int superhyway_register_driver(struct superhyway_driver *);
 void superhyway_unregister_driver(struct superhyway_driver *);
-int superhyway_add_device(unsigned int, unsigned long, unsigned long long);
+int superhyway_add_device(unsigned long base, struct superhyway_device *, struct superhyway_bus *);
+int superhyway_add_devices(struct superhyway_bus *bus, struct superhyway_device **devices, int nr_devices);
 
 /* drivers/sh/superhyway/superhyway-sysfs.c */
 extern struct device_attribute superhyway_dev_attrs[];