arch/mips/basler/excite/excite_procfs.c

   1 /*
   2  *  Copyright (C) 2004, 2005 by Basler Vision Technologies AG
   3  *  Author: Thomas Koeller <thomas.koeller@baslerweb.com>
   4  *
   5  *  Procfs support for Basler eXcite
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21 #include <linux/module.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/seq_file.h>
  24 #include <linux/stat.h>
  25 #include <asm/page.h>
  26 #include <asm/io.h>
  27 #include <asm/system.h>
  28 #include <asm/rm9k-ocd.h>
  29
  30 #include <excite.h>
  31
  32 static int excite_unit_id_proc_show(struct seq_file *m, void *v)
  33 {
  34         seq_printf(m, "%06x", unit_id);
  35         return 0;
  36 }
  37
  38 static int excite_unit_id_proc_open(struct inode *inode, struct file *file)
  39 {
  40         return single_open(file, excite_unit_id_proc_show, NULL);
  41 }
  42
  43 static const struct file_operations excite_unit_id_proc_fops = {
  44         .owner          = THIS_MODULE,
  45         .open           = excite_unit_id_proc_open,
  46         .read           = seq_read,
  47         .llseek         = seq_lseek,
  48         .release        = single_release,
  49 };
  50
  51 static int
  52 excite_bootrom_read(char *page, char **start, off_t off, int count,
  53                   int *eof, void *data)
  54 {
  55         void __iomem * src;
  56
  57         if (off >= EXCITE_SIZE_BOOTROM) {
  58                 *eof = 1;
  59                 return 0;
  60         }
  61
  62         if ((off + count) > EXCITE_SIZE_BOOTROM)
  63                 count = EXCITE_SIZE_BOOTROM - off;
  64
  65         src = ioremap(EXCITE_PHYS_BOOTROM + off, count);
  66         if (src) {
  67                 memcpy_fromio(page, src, count);
  68                 iounmap(src);
  69                 *start = page;
  70         } else {
  71                 count = -ENOMEM;
  72         }
  73
  74         return count;
  75 }
  76
  77 void excite_procfs_init(void)
  78 {
  79         /* Create & populate /proc/excite */
  80         struct proc_dir_entry * const pdir = proc_mkdir("excite", NULL);
  81         if (pdir) {
  82                 struct proc_dir_entry * e;
  83
  84                 e = proc_create("unit_id", S_IRUGO, pdir,
  85                                 &excite_unit_id_proc_fops);
  86                 if (e) e->size = 6;
  87
  88                 e = create_proc_read_entry("bootrom", S_IRUGO, pdir,
  89                                            excite_bootrom_read, NULL);
  90                 if (e) e->size = EXCITE_SIZE_BOOTROM;
  91         }
  92 }