diff options
Diffstat (limited to 'include/linux/mca.h')
| -rw-r--r-- | include/linux/mca.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/include/linux/mca.h b/include/linux/mca.h new file mode 100644 index 00000000000..5cff2923092 --- /dev/null +++ b/include/linux/mca.h @@ -0,0 +1,146 @@ +/* + * Header for Microchannel Architecture Bus + * Written by Martin Kolinek, February 1996 + */ + +#ifndef _LINUX_MCA_H +#define _LINUX_MCA_H + +#include <linux/device.h> + +#ifdef CONFIG_MCA +#include <asm/mca.h> + +extern int MCA_bus; +#else +#define MCA_bus 0 +#endif + +/* This sets up an information callback for /proc/mca/slot?. The + * function is called with the buffer, slot, and device pointer (or + * some equally informative context information, or nothing, if you + * prefer), and is expected to put useful information into the + * buffer. The adapter name, id, and POS registers get printed + * before this is called though, so don't do it again. + * + * This should be called with a NULL procfn when a module + * unregisters, thus preventing kernel crashes and other such + * nastiness. + */ +typedef int (*MCA_ProcFn)(char* buf, int slot, void* dev); + +/* Should only be called by the NMI interrupt handler, this will do some + * fancy stuff to figure out what might have generated a NMI. + */ +extern void mca_handle_nmi(void); + +enum MCA_AdapterStatus { + MCA_ADAPTER_NORMAL = 0, + MCA_ADAPTER_NONE = 1, + MCA_ADAPTER_DISABLED = 2, + MCA_ADAPTER_ERROR = 3 +}; + +struct mca_device { + u64 dma_mask; + int pos_id; + int slot; + + /* index into id_table, set by the bus match routine */ + int index; + + /* is there a driver installed? 0 - No, 1 - Yes */ + int driver_loaded; + /* POS registers */ + unsigned char pos[8]; + /* if a pseudo adapter of the motherboard, this is the motherboard + * register value to use for setup cycles */ + short pos_register; + + enum MCA_AdapterStatus status; +#ifdef CONFIG_MCA_PROC_FS + /* name of the proc/mca file */ + char procname[8]; + /* /proc info callback */ + MCA_ProcFn procfn; + /* device/context info for proc callback */ + void *proc_dev; +#endif + struct device dev; + char name[32]; +}; +#define to_mca_device(mdev) container_of(mdev, struct mca_device, dev) + +struct mca_bus_accessor_functions { + unsigned char (*mca_read_pos)(struct mca_device *, int reg); + void (*mca_write_pos)(struct mca_device *, int reg, + unsigned char byte); + int (*mca_transform_irq)(struct mca_device *, int irq); + int (*mca_transform_ioport)(struct mca_device *, + int region); + void * (*mca_transform_memory)(struct mca_device *, + void *memory); +}; + +struct mca_bus { + u64 default_dma_mask; + int number; + struct mca_bus_accessor_functions f; + struct device dev; + char name[32]; +}; +#define to_mca_bus(mdev) container_of(mdev, struct mca_bus, dev) + +struct mca_driver { + const short *id_table; + void *driver_data; + struct device_driver driver; +}; +#define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver) + +/* Ongoing supported API functions */ +extern struct mca_device *mca_find_device_by_slot(int slot); +extern int mca_system_init(void); +extern struct mca_bus *mca_attach_bus(int); + +extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev, + int reg); +extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg); +extern void mca_device_write_pos(struct mca_device *mca_dev, int reg, + unsigned char byte); +extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq); +extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port); +extern void *mca_device_transform_memory(struct mca_device *mca_dev, + void *mem); +extern int mca_device_claimed(struct mca_device *mca_dev); +extern void mca_device_set_claim(struct mca_device *mca_dev, int val); +extern void mca_device_set_name(struct mca_device *mca_dev, const char *name); +static inline char *mca_device_get_name(struct mca_device *mca_dev) +{ + return mca_dev ? mca_dev->name : NULL; +} + +extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev); + +extern struct bus_type mca_bus_type; + +extern int mca_register_driver(struct mca_driver *drv); +extern void mca_unregister_driver(struct mca_driver *drv); + +/* WARNING: only called by the boot time device setup */ +extern int mca_register_device(int bus, struct mca_device *mca_dev); + +#ifdef CONFIG_MCA_PROC_FS +extern void mca_do_proc_init(void); +extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev); +#else +static inline void mca_do_proc_init(void) +{ +} + +static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev) +{ +} +#endif + +#endif /* _LINUX_MCA_H */ |