165cd577dSPetr Stehlik /*
265cd577dSPetr Stehlik * natfeat.c - ARAnyM hardware support via Native Features (natfeats)
365cd577dSPetr Stehlik *
465cd577dSPetr Stehlik * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
565cd577dSPetr Stehlik *
665cd577dSPetr Stehlik * Reworked for Linux by Roman Zippel <zippel@linux-m68k.org>
765cd577dSPetr Stehlik *
865cd577dSPetr Stehlik * This software may be used and distributed according to the terms of
965cd577dSPetr Stehlik * the GNU General Public License (GPL), incorporated herein by reference.
1065cd577dSPetr Stehlik */
1165cd577dSPetr Stehlik
12a4df02a2SGeert Uytterhoeven #include <linux/init.h>
1365cd577dSPetr Stehlik #include <linux/types.h>
1465cd577dSPetr Stehlik #include <linux/console.h>
1565cd577dSPetr Stehlik #include <linux/string.h>
1665cd577dSPetr Stehlik #include <linux/kernel.h>
1765cd577dSPetr Stehlik #include <linux/module.h>
18*f0f7e526SDmitry Osipenko #include <linux/reboot.h>
1965cd577dSPetr Stehlik #include <linux/io.h>
2065cd577dSPetr Stehlik #include <asm/machdep.h>
2165cd577dSPetr Stehlik #include <asm/natfeat.h>
2265cd577dSPetr Stehlik
2355490050SGeert Uytterhoeven extern long nf_get_id_phys(unsigned long feature_name);
24e8184e10SGeert Uytterhoeven
2565cd577dSPetr Stehlik asm("\n"
2655490050SGeert Uytterhoeven " .global nf_get_id_phys,nf_call\n"
2755490050SGeert Uytterhoeven "nf_get_id_phys:\n"
2865cd577dSPetr Stehlik " .short 0x7300\n"
2965cd577dSPetr Stehlik " rts\n"
3065cd577dSPetr Stehlik "nf_call:\n"
3165cd577dSPetr Stehlik " .short 0x7301\n"
3265cd577dSPetr Stehlik " rts\n"
3365cd577dSPetr Stehlik "1: moveq.l #0,%d0\n"
3465cd577dSPetr Stehlik " rts\n"
3565cd577dSPetr Stehlik " .section __ex_table,\"a\"\n"
3655490050SGeert Uytterhoeven " .long nf_get_id_phys,1b\n"
3765cd577dSPetr Stehlik " .long nf_call,1b\n"
3865cd577dSPetr Stehlik " .previous");
3965cd577dSPetr Stehlik EXPORT_SYMBOL_GPL(nf_call);
4065cd577dSPetr Stehlik
nf_get_id(const char * feature_name)41e8184e10SGeert Uytterhoeven long nf_get_id(const char *feature_name)
42e8184e10SGeert Uytterhoeven {
43e8184e10SGeert Uytterhoeven /* feature_name may be in vmalloc()ed memory, so make a copy */
44e8184e10SGeert Uytterhoeven char name_copy[32];
45e8184e10SGeert Uytterhoeven size_t n;
46e8184e10SGeert Uytterhoeven
47e8184e10SGeert Uytterhoeven n = strlcpy(name_copy, feature_name, sizeof(name_copy));
48e8184e10SGeert Uytterhoeven if (n >= sizeof(name_copy))
49e8184e10SGeert Uytterhoeven return 0;
50e8184e10SGeert Uytterhoeven
5155490050SGeert Uytterhoeven return nf_get_id_phys(virt_to_phys(name_copy));
52e8184e10SGeert Uytterhoeven }
53e8184e10SGeert Uytterhoeven EXPORT_SYMBOL_GPL(nf_get_id);
54e8184e10SGeert Uytterhoeven
nfprint(const char * fmt,...)5565cd577dSPetr Stehlik void nfprint(const char *fmt, ...)
5665cd577dSPetr Stehlik {
5765cd577dSPetr Stehlik static char buf[256];
5865cd577dSPetr Stehlik va_list ap;
5965cd577dSPetr Stehlik int n;
6065cd577dSPetr Stehlik
6165cd577dSPetr Stehlik va_start(ap, fmt);
6265cd577dSPetr Stehlik n = vsnprintf(buf, 256, fmt, ap);
6355490050SGeert Uytterhoeven nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf));
6465cd577dSPetr Stehlik va_end(ap);
6565cd577dSPetr Stehlik }
6665cd577dSPetr Stehlik
nf_poweroff(void)6765cd577dSPetr Stehlik static void nf_poweroff(void)
6865cd577dSPetr Stehlik {
6965cd577dSPetr Stehlik long id = nf_get_id("NF_SHUTDOWN");
7065cd577dSPetr Stehlik
7165cd577dSPetr Stehlik if (id)
7265cd577dSPetr Stehlik nf_call(id);
7365cd577dSPetr Stehlik }
7465cd577dSPetr Stehlik
nf_init(void)75a4df02a2SGeert Uytterhoeven void __init nf_init(void)
7665cd577dSPetr Stehlik {
7765cd577dSPetr Stehlik unsigned long id, version;
7865cd577dSPetr Stehlik char buf[256];
7965cd577dSPetr Stehlik
8065cd577dSPetr Stehlik id = nf_get_id("NF_VERSION");
8165cd577dSPetr Stehlik if (!id)
8265cd577dSPetr Stehlik return;
8365cd577dSPetr Stehlik version = nf_call(id);
8465cd577dSPetr Stehlik
8565cd577dSPetr Stehlik id = nf_get_id("NF_NAME");
8665cd577dSPetr Stehlik if (!id)
8765cd577dSPetr Stehlik return;
8855490050SGeert Uytterhoeven nf_call(id, virt_to_phys(buf), 256);
8965cd577dSPetr Stehlik buf[255] = 0;
9065cd577dSPetr Stehlik
9165cd577dSPetr Stehlik pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
9265cd577dSPetr Stehlik version & 0xffff);
9365cd577dSPetr Stehlik
94*f0f7e526SDmitry Osipenko register_platform_power_off(nf_poweroff);
9565cd577dSPetr Stehlik }
96