1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * PROM library initialisation code. 7 * 8 * Copyright (C) 1999,2000,2004,2005,2012 MIPS Technologies, Inc. 9 * All rights reserved. 10 * Authors: Carsten Langgaard <carstenl@mips.com> 11 * Maciej W. Rozycki <macro@mips.com> 12 * Steven J. Hill <sjhill@mips.com> 13 */ 14 #include <linux/init.h> 15 #include <linux/string.h> 16 #include <linux/kernel.h> 17 #include <linux/pci_regs.h> 18 #include <linux/serial_core.h> 19 20 #include <asm/cacheflush.h> 21 #include <asm/smp-ops.h> 22 #include <asm/traps.h> 23 #include <asm/fw/fw.h> 24 #include <asm/mips-cps.h> 25 #include <asm/mips-boards/generic.h> 26 #include <asm/mips-boards/malta.h> 27 28 static int mips_revision_corid; 29 int mips_revision_sconid; 30 31 /* Bonito64 system controller register base. */ 32 unsigned long _pcictrl_bonito; 33 unsigned long _pcictrl_bonito_pcicfg; 34 35 /* GT64120 system controller register base */ 36 unsigned long _pcictrl_gt64120; 37 38 /* MIPS System controller register base */ 39 unsigned long _pcictrl_msc; 40 41 #ifdef CONFIG_SERIAL_8250_CONSOLE 42 static void __init console_config(void) 43 { 44 char console_string[40]; 45 int baud = 0; 46 char parity = '\0', bits = '\0', flow = '\0'; 47 char *s; 48 49 s = fw_getenv("modetty0"); 50 if (s) { 51 while (*s >= '0' && *s <= '9') 52 baud = baud*10 + *s++ - '0'; 53 if (*s == ',') 54 s++; 55 if (*s) 56 parity = *s++; 57 if (*s == ',') 58 s++; 59 if (*s) 60 bits = *s++; 61 if (*s == ',') 62 s++; 63 if (*s == 'h') 64 flow = 'r'; 65 } 66 if (baud == 0) 67 baud = 38400; 68 if (parity != 'n' && parity != 'o' && parity != 'e') 69 parity = 'n'; 70 if (bits != '7' && bits != '8') 71 bits = '8'; 72 if (flow == '\0') 73 flow = 'r'; 74 75 if ((strstr(fw_getcmdline(), "earlycon=")) == NULL) { 76 sprintf(console_string, "uart8250,io,0x3f8,%d%c%c", baud, 77 parity, bits); 78 setup_earlycon(console_string); 79 } 80 81 if ((strstr(fw_getcmdline(), "console=")) == NULL) { 82 sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, 83 parity, bits, flow); 84 strcat(fw_getcmdline(), console_string); 85 pr_info("Config serial console:%s\n", console_string); 86 } 87 } 88 #endif 89 90 static void __init mips_nmi_setup(void) 91 { 92 void *base; 93 94 base = cpu_has_veic ? 95 (void *)(CAC_BASE + 0xa80) : 96 (void *)(CAC_BASE + 0x380); 97 memcpy(base, except_vec_nmi, 0x80); 98 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); 99 } 100 101 static void __init mips_ejtag_setup(void) 102 { 103 void *base; 104 extern char except_vec_ejtag_debug[]; 105 106 base = cpu_has_veic ? 107 (void *)(CAC_BASE + 0xa00) : 108 (void *)(CAC_BASE + 0x300); 109 memcpy(base, except_vec_ejtag_debug, 0x80); 110 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80); 111 } 112 113 phys_addr_t mips_cpc_default_phys_base(void) 114 { 115 return CPC_BASE_ADDR; 116 } 117 118 void __init prom_init(void) 119 { 120 /* 121 * early setup of _pcictrl_bonito so that we can determine 122 * the system controller on a CORE_EMUL board 123 */ 124 _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE); 125 126 mips_revision_corid = MIPS_REVISION_CORID; 127 128 if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) { 129 if (BONITO_PCIDID == 0x0001df53 || 130 BONITO_PCIDID == 0x0003df53) 131 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON; 132 else 133 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC; 134 } 135 136 mips_revision_sconid = MIPS_REVISION_SCONID; 137 if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) { 138 switch (mips_revision_corid) { 139 case MIPS_REVISION_CORID_QED_RM5261: 140 case MIPS_REVISION_CORID_CORE_LV: 141 case MIPS_REVISION_CORID_CORE_FPGA: 142 case MIPS_REVISION_CORID_CORE_FPGAR2: 143 mips_revision_sconid = MIPS_REVISION_SCON_GT64120; 144 break; 145 case MIPS_REVISION_CORID_CORE_EMUL_BON: 146 case MIPS_REVISION_CORID_BONITO64: 147 case MIPS_REVISION_CORID_CORE_20K: 148 mips_revision_sconid = MIPS_REVISION_SCON_BONITO; 149 break; 150 case MIPS_REVISION_CORID_CORE_MSC: 151 case MIPS_REVISION_CORID_CORE_FPGA2: 152 case MIPS_REVISION_CORID_CORE_24K: 153 /* 154 * SOCit/ROCit support is essentially identical 155 * but make an attempt to distinguish them 156 */ 157 mips_revision_sconid = MIPS_REVISION_SCON_SOCIT; 158 break; 159 case MIPS_REVISION_CORID_CORE_FPGA3: 160 case MIPS_REVISION_CORID_CORE_FPGA4: 161 case MIPS_REVISION_CORID_CORE_FPGA5: 162 case MIPS_REVISION_CORID_CORE_EMUL_MSC: 163 default: 164 /* See above */ 165 mips_revision_sconid = MIPS_REVISION_SCON_ROCIT; 166 break; 167 } 168 } 169 170 switch (mips_revision_sconid) { 171 u32 start, map, mask, data; 172 173 case MIPS_REVISION_SCON_GT64120: 174 /* 175 * Setup the North bridge to do Master byte-lane swapping 176 * when running in bigendian. 177 */ 178 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000); 179 180 #ifdef CONFIG_CPU_LITTLE_ENDIAN 181 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT | 182 GT_PCI0_CMD_SBYTESWAP_BIT); 183 #else 184 GT_WRITE(GT_PCI0_CMD_OFS, 0); 185 #endif 186 /* Fix up PCI I/O mapping if necessary (for Atlas). */ 187 start = GT_READ(GT_PCI0IOLD_OFS); 188 map = GT_READ(GT_PCI0IOREMAP_OFS); 189 if ((start & map) != 0) { 190 map &= ~start; 191 GT_WRITE(GT_PCI0IOREMAP_OFS, map); 192 } 193 194 set_io_port_base(MALTA_GT_PORT_BASE); 195 break; 196 197 case MIPS_REVISION_SCON_BONITO: 198 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE); 199 200 /* 201 * Disable Bonito IOBC. 202 */ 203 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG & 204 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | 205 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); 206 207 /* 208 * Setup the North bridge to do Master byte-lane swapping 209 * when running in bigendian. 210 */ 211 #ifdef CONFIG_CPU_LITTLE_ENDIAN 212 BONITO_BONGENCFG = BONITO_BONGENCFG & 213 ~(BONITO_BONGENCFG_MSTRBYTESWAP | 214 BONITO_BONGENCFG_BYTESWAP); 215 #else 216 BONITO_BONGENCFG = BONITO_BONGENCFG | 217 BONITO_BONGENCFG_MSTRBYTESWAP | 218 BONITO_BONGENCFG_BYTESWAP; 219 #endif 220 221 set_io_port_base(MALTA_BONITO_PORT_BASE); 222 break; 223 224 case MIPS_REVISION_SCON_SOCIT: 225 case MIPS_REVISION_SCON_ROCIT: 226 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000); 227 mips_pci_controller: 228 mb(); 229 MSC_READ(MSC01_PCI_CFG, data); 230 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT); 231 wmb(); 232 233 /* Fix up lane swapping. */ 234 #ifdef CONFIG_CPU_LITTLE_ENDIAN 235 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP); 236 #else 237 MSC_WRITE(MSC01_PCI_SWAP, 238 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF | 239 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF | 240 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF); 241 #endif 242 243 /* 244 * Setup the Malta max (2GB) memory for PCI DMA in host bridge 245 * in transparent addressing mode. 246 */ 247 mask = PHYS_OFFSET | PCI_BASE_ADDRESS_MEM_PREFETCH; 248 MSC_WRITE(MSC01_PCI_BAR0, mask); 249 MSC_WRITE(MSC01_PCI_HEAD4, mask); 250 251 mask &= MSC01_PCI_BAR0_SIZE_MSK; 252 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask); 253 MSC_WRITE(MSC01_PCI_P2SCMAPL, mask); 254 255 /* Don't handle target retries indefinitely. */ 256 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) == 257 MSC01_PCI_CFG_MAXRTRY_MSK) 258 data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK << 259 MSC01_PCI_CFG_MAXRTRY_SHF)) | 260 ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) << 261 MSC01_PCI_CFG_MAXRTRY_SHF); 262 263 wmb(); 264 MSC_WRITE(MSC01_PCI_CFG, data); 265 mb(); 266 267 set_io_port_base(MALTA_MSC_PORT_BASE); 268 break; 269 270 case MIPS_REVISION_SCON_SOCITSC: 271 case MIPS_REVISION_SCON_SOCITSCP: 272 _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000); 273 goto mips_pci_controller; 274 275 default: 276 /* Unknown system controller */ 277 while (1); /* We die here... */ 278 } 279 board_nmi_handler_setup = mips_nmi_setup; 280 board_ejtag_handler_setup = mips_ejtag_setup; 281 282 fw_init_cmdline(); 283 fw_meminit(); 284 #ifdef CONFIG_SERIAL_8250_CONSOLE 285 console_config(); 286 #endif 287 /* Early detection of CMP support */ 288 mips_cpc_probe(); 289 290 if (!register_cps_smp_ops()) 291 return; 292 if (!register_vsmp_smp_ops()) 293 return; 294 register_up_smp_ops(); 295 } 296