Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * natfeat.c - ARAnyM hardware support via Native Features (natfeats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Reworked for Linux by Roman Zippel <zippel@linux-m68k.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * This software may be used and distributed according to the terms of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * the GNU General Public License (GPL), incorporated herein by reference.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/natfeat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) extern long nf_get_id_phys(unsigned long feature_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) asm("\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) "	.global nf_get_id_phys,nf_call\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) "nf_get_id_phys:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) "	.short	0x7300\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) "	rts\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) "nf_call:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) "	.short	0x7301\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) "	rts\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) "1:	moveq.l	#0,%d0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) "	rts\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) "	.section __ex_table,\"a\"\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) "	.long	nf_get_id_phys,1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) "	.long	nf_call,1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) "	.previous");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) EXPORT_SYMBOL_GPL(nf_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) long nf_get_id(const char *feature_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/* feature_name may be in vmalloc()ed memory, so make a copy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	char name_copy[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	size_t n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	n = strlcpy(name_copy, feature_name, sizeof(name_copy));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	if (n >= sizeof(name_copy))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	return nf_get_id_phys(virt_to_phys(name_copy));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) EXPORT_SYMBOL_GPL(nf_get_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) void nfprint(const char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	static char buf[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	va_list ap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	va_start(ap, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	n = vsnprintf(buf, 256, fmt, ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	nf_call(nf_get_id("NF_STDERR"), virt_to_phys(buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	va_end(ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static void nf_poweroff(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	long id = nf_get_id("NF_SHUTDOWN");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	if (id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		nf_call(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) void __init nf_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	unsigned long id, version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	char buf[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	id = nf_get_id("NF_VERSION");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	if (!id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	version = nf_call(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 	id = nf_get_id("NF_NAME");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	if (!id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	nf_call(id, virt_to_phys(buf), 256);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	buf[255] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 	pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 		version & 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	mach_power_off = nf_poweroff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }