161 строка
3.7 KiB
C
161 строка
3.7 KiB
C
/*
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* Procfs interface for the Zorro bus.
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*
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* Copyright (C) 1998-2003 Geert Uytterhoeven
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*
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* Heavily based on the procfs interface for the PCI bus, which is
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*
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* Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*/
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#include <linux/types.h>
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#include <linux/zorro.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <asm/uaccess.h>
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#include <asm/amigahw.h>
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#include <asm/setup.h>
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static loff_t
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proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
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{
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loff_t new = -1;
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struct inode *inode = file_inode(file);
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mutex_lock(&inode->i_mutex);
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switch (whence) {
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case 0:
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new = off;
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break;
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case 1:
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new = file->f_pos + off;
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break;
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case 2:
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new = sizeof(struct ConfigDev) + off;
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break;
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}
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if (new < 0 || new > sizeof(struct ConfigDev))
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new = -EINVAL;
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else
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file->f_pos = new;
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mutex_unlock(&inode->i_mutex);
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return new;
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}
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static ssize_t
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proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
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{
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struct zorro_dev *z = PDE_DATA(file_inode(file));
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struct ConfigDev cd;
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loff_t pos = *ppos;
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if (pos >= sizeof(struct ConfigDev))
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return 0;
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if (nbytes >= sizeof(struct ConfigDev))
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nbytes = sizeof(struct ConfigDev);
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if (pos + nbytes > sizeof(struct ConfigDev))
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nbytes = sizeof(struct ConfigDev) - pos;
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/* Construct a ConfigDev */
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memset(&cd, 0, sizeof(cd));
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cd.cd_Rom = z->rom;
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cd.cd_SlotAddr = z->slotaddr;
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cd.cd_SlotSize = z->slotsize;
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cd.cd_BoardAddr = (void *)zorro_resource_start(z);
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cd.cd_BoardSize = zorro_resource_len(z);
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if (copy_to_user(buf, (void *)&cd + pos, nbytes))
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return -EFAULT;
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*ppos += nbytes;
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return nbytes;
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}
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static const struct file_operations proc_bus_zorro_operations = {
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.owner = THIS_MODULE,
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.llseek = proc_bus_zorro_lseek,
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.read = proc_bus_zorro_read,
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};
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static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
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{
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return (*pos < zorro_num_autocon) ? pos : NULL;
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}
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static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
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{
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(*pos)++;
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return (*pos < zorro_num_autocon) ? pos : NULL;
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}
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static void zorro_seq_stop(struct seq_file *m, void *v)
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{
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}
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static int zorro_seq_show(struct seq_file *m, void *v)
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{
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unsigned int slot = *(loff_t *)v;
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struct zorro_dev *z = &zorro_autocon[slot];
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seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
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(unsigned long)zorro_resource_start(z),
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(unsigned long)zorro_resource_len(z),
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z->rom.er_Type);
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return 0;
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}
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static const struct seq_operations zorro_devices_seq_ops = {
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.start = zorro_seq_start,
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.next = zorro_seq_next,
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.stop = zorro_seq_stop,
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.show = zorro_seq_show,
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};
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static int zorro_devices_proc_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &zorro_devices_seq_ops);
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}
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static const struct file_operations zorro_devices_proc_fops = {
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.owner = THIS_MODULE,
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.open = zorro_devices_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static struct proc_dir_entry *proc_bus_zorro_dir;
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static int __init zorro_proc_attach_device(unsigned int slot)
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{
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struct proc_dir_entry *entry;
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char name[4];
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sprintf(name, "%02x", slot);
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entry = proc_create_data(name, 0, proc_bus_zorro_dir,
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&proc_bus_zorro_operations,
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&zorro_autocon[slot]);
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if (!entry)
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return -ENOMEM;
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proc_set_size(entry, sizeof(struct zorro_dev));
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return 0;
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}
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static int __init zorro_proc_init(void)
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{
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unsigned int slot;
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if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
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proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
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proc_create("devices", 0, proc_bus_zorro_dir,
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&zorro_devices_proc_fops);
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for (slot = 0; slot < zorro_num_autocon; slot++)
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zorro_proc_attach_device(slot);
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}
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return 0;
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}
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device_initcall(zorro_proc_init);
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