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055a251214
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>
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/*
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* include/linux/superhyway.h
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*
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* SuperHyway Bus definitions
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*
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* Copyright (C) 2004, 2005 Paul Mundt <lethal@linux-sh.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef __LINUX_SUPERHYWAY_H
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#define __LINUX_SUPERHYWAY_H
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#include <linux/device.h>
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/*
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* SuperHyway IDs
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*/
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#define SUPERHYWAY_DEVICE_ID_SH5_DMAC 0x0183
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struct superhyway_vcr_info {
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u8 perr_flags; /* P-port Error flags */
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u8 merr_flags; /* Module Error flags */
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u16 mod_vers; /* Module Version */
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u16 mod_id; /* Module ID */
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u8 bot_mb; /* Bottom Memory block */
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u8 top_mb; /* Top Memory block */
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};
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struct superhyway_ops {
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int (*read_vcr)(unsigned long base, struct superhyway_vcr_info *vcr);
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int (*write_vcr)(unsigned long base, struct superhyway_vcr_info vcr);
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};
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struct superhyway_bus {
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struct superhyway_ops *ops;
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};
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extern struct superhyway_bus superhyway_channels[];
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struct superhyway_device_id {
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unsigned int id;
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unsigned long driver_data;
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};
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struct superhyway_device;
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extern struct bus_type superhyway_bus_type;
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struct superhyway_driver {
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char *name;
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const struct superhyway_device_id *id_table;
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struct device_driver drv;
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int (*probe)(struct superhyway_device *dev, const struct superhyway_device_id *id);
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void (*remove)(struct superhyway_device *dev);
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};
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#define to_superhyway_driver(d) container_of((d), struct superhyway_driver, drv)
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struct superhyway_device {
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char name[32];
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struct device dev;
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struct superhyway_device_id id;
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struct superhyway_driver *drv;
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struct superhyway_bus *bus;
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int num_resources;
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struct resource *resource;
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struct superhyway_vcr_info vcr;
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};
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#define to_superhyway_device(d) container_of((d), struct superhyway_device, dev)
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#define superhyway_get_drvdata(d) dev_get_drvdata(&(d)->dev)
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#define superhyway_set_drvdata(d,p) dev_set_drvdata(&(d)->dev, (p))
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static inline int
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superhyway_read_vcr(struct superhyway_device *dev, unsigned long base,
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struct superhyway_vcr_info *vcr)
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{
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return dev->bus->ops->read_vcr(base, vcr);
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}
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static inline int
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superhyway_write_vcr(struct superhyway_device *dev, unsigned long base,
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struct superhyway_vcr_info vcr)
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{
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return dev->bus->ops->write_vcr(base, vcr);
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}
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extern int superhyway_scan_bus(struct superhyway_bus *);
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/* drivers/sh/superhyway/superhyway.c */
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int superhyway_register_driver(struct superhyway_driver *);
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void superhyway_unregister_driver(struct superhyway_driver *);
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int superhyway_add_device(unsigned long base, struct superhyway_device *, struct superhyway_bus *);
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int superhyway_add_devices(struct superhyway_bus *bus, struct superhyway_device **devices, int nr_devices);
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/* drivers/sh/superhyway/superhyway-sysfs.c */
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extern struct device_attribute superhyway_dev_attrs[];
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#endif /* __LINUX_SUPERHYWAY_H */
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