| Ralf Baechle | 35189fa | 2006-06-18 16:39:46 +0100 | [diff] [blame^] | 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 | |
| 22 | #include <linux/config.h> |
| 23 | #include <linux/proc_fs.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_get_unit_id(char *buf, char **addr, off_t offs, int size) |
| 33 | { |
| 34 | const int len = snprintf(buf, PAGE_SIZE, "%06x", unit_id); |
| 35 | const int w = len - offs; |
| 36 | *addr = buf + offs; |
| 37 | return w < size ? w : size; |
| 38 | } |
| 39 | |
| 40 | static int |
| 41 | excite_bootrom_read(char *page, char **start, off_t off, int count, |
| 42 | int *eof, void *data) |
| 43 | { |
| 44 | void __iomem * src; |
| 45 | |
| 46 | if (off >= EXCITE_SIZE_BOOTROM) { |
| 47 | *eof = 1; |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | if ((off + count) > EXCITE_SIZE_BOOTROM) |
| 52 | count = EXCITE_SIZE_BOOTROM - off; |
| 53 | |
| 54 | src = ioremap(EXCITE_PHYS_BOOTROM + off, count); |
| 55 | if (src) { |
| 56 | memcpy_fromio(page, src, count); |
| 57 | iounmap(src); |
| 58 | *start = page; |
| 59 | } else { |
| 60 | count = -ENOMEM; |
| 61 | } |
| 62 | |
| 63 | return count; |
| 64 | } |
| 65 | |
| 66 | void excite_procfs_init(void) |
| 67 | { |
| 68 | /* Create & populate /proc/excite */ |
| 69 | struct proc_dir_entry * const pdir = proc_mkdir("excite", &proc_root); |
| 70 | if (pdir) { |
| 71 | struct proc_dir_entry * e; |
| 72 | |
| 73 | e = create_proc_info_entry("unit_id", S_IRUGO, pdir, |
| 74 | excite_get_unit_id); |
| 75 | if (e) e->size = 6; |
| 76 | |
| 77 | e = create_proc_read_entry("bootrom", S_IRUGO, pdir, |
| 78 | excite_bootrom_read, NULL); |
| 79 | if (e) e->size = EXCITE_SIZE_BOOTROM; |
| 80 | } |
| 81 | } |