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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation */ #include <linux/export.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/reboot.h> #include <linux/string.h> #include <asm/bootinfo.h> #include <asm/cpu.h> #include <asm/mipsregs.h> #include <asm/io.h> #include <asm/sibyte/sb1250.h> #include <asm/sibyte/sb1250_regs.h> #include <asm/sibyte/sb1250_scd.h> unsigned int sb1_pass; unsigned int soc_pass; unsigned int soc_type; EXPORT_SYMBOL(soc_type); unsigned int periph_rev; EXPORT_SYMBOL_GPL(periph_rev); unsigned int zbbus_mhz; EXPORT_SYMBOL(zbbus_mhz); static char *soc_str; static char *pass_str; static unsigned int war_pass; /* XXXKW don't overload PASS defines? */ static int __init setup_bcm1250(void) { int ret = 0; switch (soc_pass) { case K_SYS_REVISION_BCM1250_PASS1: periph_rev = 1; pass_str = "Pass 1"; break; case K_SYS_REVISION_BCM1250_A10: periph_rev = 2; pass_str = "A8/A10"; /* XXXKW different war_pass? */ war_pass = K_SYS_REVISION_BCM1250_PASS2; break; case K_SYS_REVISION_BCM1250_PASS2_2: periph_rev = 2; pass_str = "B1"; break; case K_SYS_REVISION_BCM1250_B2: periph_rev = 2; pass_str = "B2"; war_pass = K_SYS_REVISION_BCM1250_PASS2_2; break; case K_SYS_REVISION_BCM1250_PASS3: periph_rev = 3; pass_str = "C0"; break; case K_SYS_REVISION_BCM1250_C1: periph_rev = 3; pass_str = "C1"; break; default: if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) { periph_rev = 2; pass_str = "A0-A6"; war_pass = K_SYS_REVISION_BCM1250_PASS2; } else { printk("Unknown BCM1250 rev %x\n", soc_pass); ret = 1; } break; } return ret; } int sb1250_m3_workaround_needed(void) { switch (soc_type) { case K_SYS_SOC_TYPE_BCM1250: case K_SYS_SOC_TYPE_BCM1250_ALT: case K_SYS_SOC_TYPE_BCM1250_ALT2: case K_SYS_SOC_TYPE_BCM1125: case K_SYS_SOC_TYPE_BCM1125H: return soc_pass < K_SYS_REVISION_BCM1250_C0; default: return 0; } } static int __init setup_bcm112x(void) { int ret = 0; switch (soc_pass) { case 0: /* Early build didn't have revid set */ periph_rev = 3; pass_str = "A1"; war_pass = K_SYS_REVISION_BCM112x_A1; break; case K_SYS_REVISION_BCM112x_A1: periph_rev = 3; pass_str = "A1"; break; case K_SYS_REVISION_BCM112x_A2: periph_rev = 3; pass_str = "A2"; break; case K_SYS_REVISION_BCM112x_A3: periph_rev = 3; pass_str = "A3"; break; case K_SYS_REVISION_BCM112x_A4: periph_rev = 3; pass_str = "A4"; break; case K_SYS_REVISION_BCM112x_B0: periph_rev = 3; pass_str = "B0"; break; default: printk("Unknown %s rev %x\n", soc_str, soc_pass); ret = 1; } return ret; } /* Setup code likely to be common to all SiByte platforms */ static int __init sys_rev_decode(void) { int ret = 0; war_pass = soc_pass; switch (soc_type) { case K_SYS_SOC_TYPE_BCM1250: case K_SYS_SOC_TYPE_BCM1250_ALT: case K_SYS_SOC_TYPE_BCM1250_ALT2: soc_str = "BCM1250"; ret = setup_bcm1250(); break; case K_SYS_SOC_TYPE_BCM1120: soc_str = "BCM1120"; ret = setup_bcm112x(); break; case K_SYS_SOC_TYPE_BCM1125: soc_str = "BCM1125"; ret = setup_bcm112x(); break; case K_SYS_SOC_TYPE_BCM1125H: soc_str = "BCM1125H"; ret = setup_bcm112x(); break; default: printk("Unknown SOC type %x\n", soc_type); ret = 1; break; } return ret; } void __init sb1250_setup(void) { uint64_t sys_rev; int plldiv; int bad_config = 0; sb1_pass = read_c0_prid() & PRID_REV_MASK; sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION)); soc_type = SYS_SOC_TYPE(sys_rev); soc_pass = G_SYS_REVISION(sys_rev); if (sys_rev_decode()) { printk("Restart after failure to identify SiByte chip\n"); machine_restart(NULL); } plldiv = G_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG))); zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25); printk("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n", soc_str, pass_str, zbbus_mhz * 2, sb1_pass); printk("Board type: %s\n", get_system_type()); switch (war_pass) { case K_SYS_REVISION_BCM1250_PASS1: printk("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, " "and the kernel doesn't have the proper " "workarounds compiled in. @@@@\n"); bad_config = 1; break; case K_SYS_REVISION_BCM1250_PASS2: /* Pass 2 - easiest as default for now - so many numbers */ #if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) || \ !defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) printk("@@@@ This is a BCM1250 A3-A10 board, and the " "kernel doesn't have the proper workarounds " "compiled in. @@@@\n"); bad_config = 1; #endif #ifdef CONFIG_CPU_HAS_PREFETCH printk("@@@@ Prefetches may be enabled in this kernel, " "but are buggy on this board. @@@@\n"); bad_config = 1; #endif break; case K_SYS_REVISION_BCM1250_PASS2_2: #ifndef CONFIG_SB1_PASS_2_WORKAROUNDS printk("@@@@ This is a BCM1250 B1/B2. board, and the " "kernel doesn't have the proper workarounds " "compiled in. @@@@\n"); bad_config = 1; #endif #if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) || \ !defined(CONFIG_CPU_HAS_PREFETCH) printk("@@@@ This is a BCM1250 B1/B2, but the kernel is " "conservatively configured for an 'A' stepping. " "@@@@\n"); #endif break; default: break; } if (bad_config) { printk("Invalid configuration for this chip.\n"); machine_restart(NULL); } } |