diff options
Diffstat (limited to 'drivers/nubus/proc.c')
| -rw-r--r-- | drivers/nubus/proc.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c new file mode 100644 index 0000000..5271a4a --- /dev/null +++ b/drivers/nubus/proc.c @@ -0,0 +1,174 @@ +/* drivers/nubus/proc.c: Proc FS interface for NuBus. + + By David Huggins-Daines <dhd@debian.org> + + Much code and many ideas from drivers/pci/proc.c: + Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> + + This is initially based on the Zorro and PCI interfaces. However, + it works somewhat differently. The intent is to provide a + structure in /proc analogous to the structure of the NuBus ROM + resources. + + Therefore each NuBus device is in fact a directory, which may in + turn contain subdirectories. The "files" correspond to NuBus + resource records. For those types of records which we know how to + convert to formats that are meaningful to userspace (mostly just + icons) these files will provide "cooked" data. Otherwise they will + simply provide raw access (read-only of course) to the ROM. */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/nubus.h> +#include <linux/proc_fs.h> +#include <linux/init.h> +#include <asm/uaccess.h> +#include <asm/byteorder.h> + +static int +get_nubus_dev_info(char *buf, char **start, off_t pos, int count) +{ + struct nubus_dev *dev = nubus_devices; + off_t at = 0; + int len, cnt; + + cnt = 0; + while (dev && count > cnt) { + len = sprintf(buf, "%x\t%04x %04x %04x %04x", + dev->board->slot, + dev->category, + dev->type, + dev->dr_sw, + dev->dr_hw); + len += sprintf(buf+len, + "\t%08lx", + dev->board->slot_addr); + buf[len++] = '\n'; + at += len; + if (at >= pos) { + if (!*start) { + *start = buf + (pos - (at - len)); + cnt = at - pos; + } else + cnt += len; + buf += len; + } + dev = dev->next; + } + return (count > cnt) ? cnt : count; +} + +static struct proc_dir_entry *proc_bus_nubus_dir; + +static void nubus_proc_subdir(struct nubus_dev* dev, + struct proc_dir_entry* parent, + struct nubus_dir* dir) +{ + struct nubus_dirent ent; + + /* Some of these are directories, others aren't */ + while (nubus_readdir(dir, &ent) != -1) { + char name[8]; + struct proc_dir_entry* e; + + sprintf(name, "%x", ent.type); + e = create_proc_entry(name, S_IFREG | S_IRUGO | + S_IWUSR, parent); + if (!e) return; + } +} + +/* Can't do this recursively since the root directory is structured + somewhat differently from the subdirectories */ +static void nubus_proc_populate(struct nubus_dev* dev, + struct proc_dir_entry* parent, + struct nubus_dir* root) +{ + struct nubus_dirent ent; + + /* We know these are all directories (board resource + one or + more functional resources) */ + while (nubus_readdir(root, &ent) != -1) { + char name[8]; + struct proc_dir_entry* e; + struct nubus_dir dir; + + sprintf(name, "%x", ent.type); + e = proc_mkdir(name, parent); + if (!e) return; + + /* And descend */ + if (nubus_get_subdir(&ent, &dir) == -1) { + /* This shouldn't happen */ + printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n", + dev->board->slot, ent.type); + continue; + } else { + nubus_proc_subdir(dev, e, &dir); + } + } +} + +int nubus_proc_attach_device(struct nubus_dev *dev) +{ + struct proc_dir_entry *e; + struct nubus_dir root; + char name[8]; + + if (dev == NULL) { + printk(KERN_ERR + "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n"); + return -1; + } + + if (dev->board == NULL) { + printk(KERN_ERR + "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n"); + printk("dev = %p, dev->board = %p\n", dev, dev->board); + return -1; + } + + /* Create a directory */ + sprintf(name, "%x", dev->board->slot); + e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir); + if (!e) + return -ENOMEM; + + /* Now recursively populate it with files */ + nubus_get_root_dir(dev->board, &root); + nubus_proc_populate(dev, e, &root); + + return 0; +} + +/* FIXME: this is certainly broken! */ +int nubus_proc_detach_device(struct nubus_dev *dev) +{ + struct proc_dir_entry *e; + + if ((e = dev->procdir)) { + if (atomic_read(&e->count)) + return -EBUSY; + remove_proc_entry(e->name, proc_bus_nubus_dir); + dev->procdir = NULL; + } + return 0; +} + +void __init proc_bus_nubus_add_devices(void) +{ + struct nubus_dev *dev; + + for(dev = nubus_devices; dev; dev = dev->next) + nubus_proc_attach_device(dev); +} + +void __init nubus_proc_init(void) +{ + if (!MACH_IS_MAC) + return; + proc_bus_nubus_dir = proc_mkdir("nubus", proc_bus); + create_proc_info_entry("devices", 0, proc_bus_nubus_dir, + get_nubus_dev_info); + proc_bus_nubus_add_devices(); +} |
