Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * identify.c: machine identification code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 1998 Harald Koerfgen and Paul M. Antoine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2002, 2003, 2004, 2005  Maciej W. Rozycki
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/mc146818rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/string.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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <asm/bootinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/dec/ioasic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <asm/dec/ioasic_addrs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <asm/dec/kn01.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <asm/dec/kn02.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <asm/dec/kn02ba.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <asm/dec/kn02ca.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <asm/dec/kn03.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <asm/dec/kn230.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <asm/dec/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <asm/dec/system.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include "dectypes.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) static const char *dec_system_strings[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	[MACH_DSUNKNOWN]	"unknown DECstation",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	[MACH_DS23100]		"DECstation 2100/3100",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	[MACH_DS5100]		"DECsystem 5100",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	[MACH_DS5000_200]	"DECstation 5000/200",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	[MACH_DS5000_1XX]	"DECstation 5000/1xx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	[MACH_DS5000_XX]	"Personal DECstation 5000/xx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	[MACH_DS5000_2X0]	"DECstation 5000/2x0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	[MACH_DS5400]		"DECsystem 5400",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	[MACH_DS5500]		"DECsystem 5500",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	[MACH_DS5800]		"DECsystem 5800",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	[MACH_DS5900]		"DECsystem 5900",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) const char *get_system_type(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define STR_BUF_LEN	64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	static char system[STR_BUF_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	static int called = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	if (called == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		called = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		snprintf(system, STR_BUF_LEN, "Digital %s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			 dec_system_strings[mips_machtype]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	return system;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * Setup essential system-specific memory addresses.  We need them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * early.  Semantically the functions belong to prom/init.c, but they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  * are compact enough we want them inlined. --macro
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) volatile u8 *dec_rtc_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) EXPORT_SYMBOL(dec_rtc_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static inline void prom_init_kn01(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	dec_kn_slot_base = KN01_SLOT_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	dec_kn_slot_size = KN01_SLOT_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static inline void prom_init_kn230(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	dec_kn_slot_base = KN01_SLOT_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	dec_kn_slot_size = KN01_SLOT_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN01_RTC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static inline void prom_init_kn02(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	dec_kn_slot_base = KN02_SLOT_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	dec_kn_slot_size = KN02_SLOT_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	dec_tc_bus = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + KN02_RTC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static inline void prom_init_kn02xa(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	dec_kn_slot_base = KN02XA_SLOT_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	dec_kn_slot_size = IOASIC_SLOT_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	dec_tc_bus = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static inline void prom_init_kn03(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	dec_kn_slot_base = KN03_SLOT_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	dec_kn_slot_size = IOASIC_SLOT_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	dec_tc_bus = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	ioasic_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_IOCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	dec_rtc_base = (void *)CKSEG1ADDR(dec_kn_slot_base + IOASIC_TOY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) void __init prom_identify_arch(u32 magic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	unsigned char dec_cpunum, dec_firmrev, dec_etc, dec_systype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	u32 dec_sysid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (!prom_is_rex(magic)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		dec_sysid = simple_strtoul(prom_getenv("systype"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 					   (char **)0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		dec_sysid = rex_getsysid();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		if (dec_sysid == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			printk("Zero sysid returned from PROM! "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			       "Assuming a PMAX-like machine.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			dec_sysid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	dec_cpunum = (dec_sysid & 0xff000000) >> 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	dec_systype = (dec_sysid & 0xff0000) >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	dec_firmrev = (dec_sysid & 0xff00) >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	dec_etc = dec_sysid & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	 * FIXME: This may not be an exhaustive list of DECStations/Servers!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	 * Put all model-specific initialisation calls here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	switch (dec_systype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	case DS2100_3100:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		mips_machtype = MACH_DS23100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		prom_init_kn01();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	case DS5100:		/* DS5100 MIPSMATE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		mips_machtype = MACH_DS5100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		prom_init_kn230();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	case DS5000_200:	/* DS5000 3max */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		mips_machtype = MACH_DS5000_200;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		prom_init_kn02();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	case DS5000_1XX:	/* DS5000/100 3min */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		mips_machtype = MACH_DS5000_1XX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		prom_init_kn02xa();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	case DS5000_2X0:	/* DS5000/240 3max+ or DS5900 bigmax */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		mips_machtype = MACH_DS5000_2X0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		prom_init_kn03();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		if (!(ioasic_read(IO_REG_SIR) & KN03_IO_INR_3MAXP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			mips_machtype = MACH_DS5900;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	case DS5000_XX:		/* Personal DS5000/xx maxine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		mips_machtype = MACH_DS5000_XX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		prom_init_kn02xa();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	case DS5800:		/* DS5800 Isis */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		mips_machtype = MACH_DS5800;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	case DS5400:		/* DS5400 MIPSfair */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		mips_machtype = MACH_DS5400;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	case DS5500:		/* DS5500 MIPSfair-2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		mips_machtype = MACH_DS5500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		mips_machtype = MACH_DSUNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (mips_machtype == MACH_DSUNKNOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		printk("This is an %s, id is %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		       dec_system_strings[mips_machtype], dec_systype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		printk("This is a %s\n", dec_system_strings[mips_machtype]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }