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devopen.c revision 1.1 
      1 /*-
      2  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Paul Fleischer <paul (at) xpg.dk>
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 #include <sys/param.h>
     30 #include <sys/disklabel.h>
     31 
     32 #include <netinet/in.h>
     33 
     34 #include <lib/libkern/libkern.h>
     35 #include <lib/libsa/stand.h>
     36 #include <lib/libsa/nfs.h>
     37 #include <lib/libsa/ext2fs.h>
     38 #include <lib/libsa/dosfs.h>
     39 #include <lib/libsa/ufs.h>
     40 
     41 #include "dev_sdmmc.h"
     42 #include <arch/evbarm/mini2440/mini2440_bootinfo.h>
     43 
     44 /* Implemented in dev_net.c */
     45 int net_open(struct open_file *, ...);
     46 int net_close(struct open_file *);
     47 int net_strategy(void *, int, daddr_t, size_t, void *, size_t *);
     48 
     49 /* Implemented in dev_sdmmc.c */
     50 int sdmmc_open(struct open_file *, ...);
     51 int sdmmc_close(struct open_file *);
     52 int sdmmc_strategy(void *, int, daddr_t, size_t, void *, size_t *);
     53 int sdmmc_get_fstype(void*);
     54 
     55 struct devsw devsw[] = {
     56 	{ "dm9000", net_strategy, net_open, net_close, noioctl },
     57 	{ "s3c sdio", sdmmc_strategy, sdmmc_open, sdmmc_close, noioctl }
     58 };
     59 
     60 struct fs_ops ops_nfs = FS_OPS(nfs);
     61 struct fs_ops ops_ext2fs = FS_OPS(ext2fs);
     62 struct fs_ops ops_dosfs = FS_OPS(dosfs);
     63 struct fs_ops ops_bsdfs = FS_OPS(ufs);
     64 struct fs_ops file_system[1];
     65 int nfsys = 1;
     66 
     67 extern struct btinfo_bootpath		bi_path;
     68 extern struct btinfo_rootdevice		bi_rdev;
     69 
     70 static void parseunit(const char *name, int *unitp, int *partp, char **pathp);
     71 
     72 int
     73 devopen(struct open_file *of, const char *name, char **file)
     74 {
     75 	int error;
     76 	extern char bootfile[];
     77 
     78 	if (strncmp("net:", name, 4) == 0 ||
     79 	    strncmp("nfs:", name, 4) == 0 ) {
     80 		of->f_dev = &devsw[0];
     81 		if ((error = net_open(of, name+4)) != 0)
     82 			return error;
     83 		file_system[0] = ops_nfs;
     84 		*file = bootfile;
     85 		strncpy(bi_path.bootpath, bootfile, sizeof(bi_path.bootpath));
     86 
     87 		return 0;
     88 	} else if (name[0] == 'l' && name[1] == 'd') {
     89 		int unit, part;
     90 		parseunit(&name[2], &unit, &part, file);
     91 		of->f_dev = &devsw[1];
     92 		if ((error = sdmmc_open(of, unit, part)) != 0)
     93 			return error;
     94 
     95 		strncpy(bi_path.bootpath, *file, sizeof(bi_path.bootpath));
     96 
     97 		snprintf(bi_rdev.devname, sizeof(bi_rdev.devname), "ld");
     98 		bi_rdev.cookie = unit;
     99 		bi_rdev.partition = part;
    100 		switch(sdmmc_get_fstype(of->f_devdata)) {
    101 		case FS_EX2FS:
    102 			file_system[0] = ops_ext2fs;
    103 			break;
    104 		case FS_MSDOS:
    105 			file_system[0] = ops_dosfs;
    106 			break;
    107 		case FS_BSDFFS:
    108 			file_system[0] = ops_bsdfs;
    109 			break;
    110 		default:
    111 			return ENOENT;
    112 		}
    113 
    114 		return 0;
    115 	}
    116 	return ENOENT;
    117 }
    118 
    119 static void
    120 parseunit(const char *name, int *unitp, int *partp, char **pathp)
    121 {
    122 	const char *p = name;
    123 	int unit, part;
    124 
    125 	unit = part = -1;
    126 	while (*p != ':' && *p != '\0') {
    127 		if (unit == -1 && *p >= '0' && *p <= '9')
    128 			unit = *p - '0';
    129 		if (part == -1 && *p >= 'a' && *p < 'a' + 16)
    130 			part = *p - 'a';
    131 		p += 1;
    132 	}
    133 	*unitp = (unit == -1) ? 0 : unit;
    134 	*partp = (part == -1) ? 0 : part;
    135 	*pathp = (*p == ':') ? (char *)p + 1 : NULL;
    136 }
    137