8813d1c00c
The MCA bus has a few "integrated" functions, which are effectively virtual slots on the bus. The problem is that these special functions don't have dedicated pos IDs, so we have to manufacture ids for them outside the pos space ... and these ids can't be matched by the standard matching function, so add a special registration that requests a list of pos ids or a particular integrated function. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
148 lines
4.3 KiB
C
148 lines
4.3 KiB
C
/*
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* Header for Microchannel Architecture Bus
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* Written by Martin Kolinek, February 1996
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*/
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#ifndef _LINUX_MCA_H
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#define _LINUX_MCA_H
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#include <linux/device.h>
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#ifdef CONFIG_MCA
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#include <asm/mca.h>
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extern int MCA_bus;
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#else
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#define MCA_bus 0
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#endif
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/* This sets up an information callback for /proc/mca/slot?. The
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* function is called with the buffer, slot, and device pointer (or
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* some equally informative context information, or nothing, if you
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* prefer), and is expected to put useful information into the
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* buffer. The adapter name, id, and POS registers get printed
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* before this is called though, so don't do it again.
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*
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* This should be called with a NULL procfn when a module
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* unregisters, thus preventing kernel crashes and other such
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* nastiness.
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*/
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typedef int (*MCA_ProcFn)(char* buf, int slot, void* dev);
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/* Should only be called by the NMI interrupt handler, this will do some
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* fancy stuff to figure out what might have generated a NMI.
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*/
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extern void mca_handle_nmi(void);
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enum MCA_AdapterStatus {
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MCA_ADAPTER_NORMAL = 0,
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MCA_ADAPTER_NONE = 1,
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MCA_ADAPTER_DISABLED = 2,
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MCA_ADAPTER_ERROR = 3
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};
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struct mca_device {
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u64 dma_mask;
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int pos_id;
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int slot;
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/* index into id_table, set by the bus match routine */
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int index;
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/* is there a driver installed? 0 - No, 1 - Yes */
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int driver_loaded;
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/* POS registers */
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unsigned char pos[8];
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/* if a pseudo adapter of the motherboard, this is the motherboard
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* register value to use for setup cycles */
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short pos_register;
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enum MCA_AdapterStatus status;
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#ifdef CONFIG_MCA_PROC_FS
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/* name of the proc/mca file */
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char procname[8];
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/* /proc info callback */
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MCA_ProcFn procfn;
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/* device/context info for proc callback */
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void *proc_dev;
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#endif
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struct device dev;
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char name[32];
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};
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#define to_mca_device(mdev) container_of(mdev, struct mca_device, dev)
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struct mca_bus_accessor_functions {
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unsigned char (*mca_read_pos)(struct mca_device *, int reg);
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void (*mca_write_pos)(struct mca_device *, int reg,
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unsigned char byte);
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int (*mca_transform_irq)(struct mca_device *, int irq);
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int (*mca_transform_ioport)(struct mca_device *,
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int region);
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void * (*mca_transform_memory)(struct mca_device *,
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void *memory);
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};
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struct mca_bus {
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u64 default_dma_mask;
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int number;
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struct mca_bus_accessor_functions f;
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struct device dev;
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char name[32];
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};
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#define to_mca_bus(mdev) container_of(mdev, struct mca_bus, dev)
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struct mca_driver {
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const short *id_table;
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void *driver_data;
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int integrated_id;
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struct device_driver driver;
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};
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#define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
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/* Ongoing supported API functions */
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extern struct mca_device *mca_find_device_by_slot(int slot);
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extern int mca_system_init(void);
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extern struct mca_bus *mca_attach_bus(int);
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extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev,
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int reg);
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extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg);
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extern void mca_device_write_pos(struct mca_device *mca_dev, int reg,
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unsigned char byte);
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extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq);
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extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port);
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extern void *mca_device_transform_memory(struct mca_device *mca_dev,
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void *mem);
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extern int mca_device_claimed(struct mca_device *mca_dev);
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extern void mca_device_set_claim(struct mca_device *mca_dev, int val);
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extern void mca_device_set_name(struct mca_device *mca_dev, const char *name);
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static inline char *mca_device_get_name(struct mca_device *mca_dev)
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{
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return mca_dev ? mca_dev->name : NULL;
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}
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extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev);
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extern struct bus_type mca_bus_type;
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extern int mca_register_driver(struct mca_driver *drv);
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extern int mca_register_driver_integrated(struct mca_driver *, int);
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extern void mca_unregister_driver(struct mca_driver *drv);
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/* WARNING: only called by the boot time device setup */
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extern int mca_register_device(int bus, struct mca_device *mca_dev);
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#ifdef CONFIG_MCA_PROC_FS
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extern void mca_do_proc_init(void);
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extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev);
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#else
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static inline void mca_do_proc_init(void)
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{
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}
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static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev)
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{
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}
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#endif
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#endif /* _LINUX_MCA_H */
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