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https://github.com/torvalds/linux
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80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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* Copyright (C) 2004, 2005 by Basler Vision Technologies AG
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* Author: Thomas Koeller <thomas.koeller@baslerweb.com>
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*
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* Procfs support for Basler eXcite
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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#include <asm/page.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/rm9k-ocd.h>
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#include <excite.h>
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static int excite_get_unit_id(char *buf, char **addr, off_t offs, int size)
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{
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const int len = snprintf(buf, PAGE_SIZE, "%06x", unit_id);
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const int w = len - offs;
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*addr = buf + offs;
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return w < size ? w : size;
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}
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static int
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excite_bootrom_read(char *page, char **start, off_t off, int count,
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int *eof, void *data)
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{
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void __iomem * src;
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if (off >= EXCITE_SIZE_BOOTROM) {
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*eof = 1;
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return 0;
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}
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if ((off + count) > EXCITE_SIZE_BOOTROM)
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count = EXCITE_SIZE_BOOTROM - off;
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src = ioremap(EXCITE_PHYS_BOOTROM + off, count);
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if (src) {
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memcpy_fromio(page, src, count);
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iounmap(src);
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*start = page;
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} else {
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count = -ENOMEM;
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}
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return count;
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}
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void excite_procfs_init(void)
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{
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/* Create & populate /proc/excite */
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struct proc_dir_entry * const pdir = proc_mkdir("excite", &proc_root);
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if (pdir) {
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struct proc_dir_entry * e;
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e = create_proc_info_entry("unit_id", S_IRUGO, pdir,
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excite_get_unit_id);
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if (e) e->size = 6;
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e = create_proc_read_entry("bootrom", S_IRUGO, pdir,
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excite_bootrom_read, NULL);
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if (e) e->size = EXCITE_SIZE_BOOTROM;
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}
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}
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