147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
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/*
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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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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 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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