summaryrefslogtreecommitdiffstats
path: root/kernel/include/linux/nubus.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/include/linux/nubus.h')
-rw-r--r--kernel/include/linux/nubus.h134
1 files changed, 134 insertions, 0 deletions
diff --git a/kernel/include/linux/nubus.h b/kernel/include/linux/nubus.h
new file mode 100644
index 000000000..6165b2c62
--- /dev/null
+++ b/kernel/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 */