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Diffstat (limited to 'include/linux/nubus.h')
| -rw-r--r-- | include/linux/nubus.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/include/linux/nubus.h b/include/linux/nubus.h new file mode 100644 index 000000000..6165b2c62 --- /dev/null +++ b/include/linux/nubus.h @@ -0,0 +1,134 @@ +/* + nubus.h: various definitions and prototypes for NuBus drivers to use. + + Originally written by Alan Cox. + + Hacked to death by C. Scott Ananian and David Huggins-Daines. + + Some of the constants in here are from the corresponding + NetBSD/OpenBSD header file, by Allen Briggs. We figured out the + rest of them on our own. */ +#ifndef LINUX_NUBUS_H +#define LINUX_NUBUS_H + +#include <asm/nubus.h> +#include <uapi/linux/nubus.h> + +struct nubus_board { + struct nubus_board* next; + struct nubus_dev* first_dev; + + /* Only 9-E actually exist, though 0-8 are also theoretically + possible, and 0 is a special case which represents the + motherboard and onboard peripherals (Ethernet, video) */ + int slot; + /* For slot 0, this is bogus. */ + char name[64]; + + /* Format block */ + unsigned char* fblock; + /* Root directory (does *not* always equal fblock + doffset!) */ + unsigned char* directory; + + unsigned long slot_addr; + /* Offset to root directory (sometimes) */ + unsigned long doffset; + /* Length over which to compute the crc */ + unsigned long rom_length; + /* Completely useless most of the time */ + unsigned long crc; + unsigned char rev; + unsigned char format; + unsigned char lanes; +}; + +struct nubus_dev { + /* Next link in device list */ + struct nubus_dev* next; + /* Directory entry in /proc/bus/nubus */ + struct proc_dir_entry* procdir; + + /* The functional resource ID of this device */ + unsigned char resid; + /* These are mostly here for convenience; we could always read + them from the ROMs if we wanted to */ + unsigned short category; + unsigned short type; + unsigned short dr_sw; + unsigned short dr_hw; + /* This is the device's name rather than the board's. + Sometimes they are different. Usually the board name is + more correct. */ + char name[64]; + /* MacOS driver (I kid you not) */ + unsigned char* driver; + /* Actually this is an offset */ + unsigned long iobase; + unsigned long iosize; + unsigned char flags, hwdevid; + + /* Functional directory */ + unsigned char* directory; + /* Much of our info comes from here */ + struct nubus_board* board; +}; + +/* This is all NuBus devices (used to find devices later on) */ +extern struct nubus_dev* nubus_devices; +/* This is all NuBus cards */ +extern struct nubus_board* nubus_boards; + +/* Generic NuBus interface functions, modelled after the PCI interface */ +void nubus_scan_bus(void); +#ifdef CONFIG_PROC_FS +extern void nubus_proc_init(void); +#else +static inline void nubus_proc_init(void) {} +#endif +int get_nubus_list(char *buf); +int nubus_proc_attach_device(struct nubus_dev *dev); +/* If we need more precision we can add some more of these */ +struct nubus_dev* nubus_find_device(unsigned short category, + unsigned short type, + unsigned short dr_hw, + unsigned short dr_sw, + const struct nubus_dev* from); +struct nubus_dev* nubus_find_type(unsigned short category, + unsigned short type, + const struct nubus_dev* from); +/* Might have more than one device in a slot, you know... */ +struct nubus_dev* nubus_find_slot(unsigned int slot, + const struct nubus_dev* from); + +/* These are somewhat more NuBus-specific. They all return 0 for + success and -1 for failure, as you'd expect. */ + +/* The root directory which contains the board and functional + directories */ +int nubus_get_root_dir(const struct nubus_board* board, + struct nubus_dir* dir); +/* The board directory */ +int nubus_get_board_dir(const struct nubus_board* board, + struct nubus_dir* dir); +/* The functional directory */ +int nubus_get_func_dir(const struct nubus_dev* dev, + struct nubus_dir* dir); + +/* These work on any directory gotten via the above */ +int nubus_readdir(struct nubus_dir* dir, + struct nubus_dirent* ent); +int nubus_find_rsrc(struct nubus_dir* dir, + unsigned char rsrc_type, + struct nubus_dirent* ent); +int nubus_rewinddir(struct nubus_dir* dir); + +/* Things to do with directory entries */ +int nubus_get_subdir(const struct nubus_dirent* ent, + struct nubus_dir* dir); +void nubus_get_rsrc_mem(void* dest, + const struct nubus_dirent *dirent, + int len); +void nubus_get_rsrc_str(void* dest, + const struct nubus_dirent *dirent, + int maxlen); +#endif /* LINUX_NUBUS_H */ |