arch/mips/mti-malta/malta-init.c

   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/serial_core.h>
  18
  19 #include <asm/cacheflush.h>
  20 #include <asm/smp-ops.h>
  21 #include <asm/traps.h>
  22 #include <asm/fw/fw.h>
  23 #include <asm/mips-cm.h>
  24 #include <asm/mips-cpc.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         extern char except_vec_nmi;
  94
  95         base = cpu_has_veic ?
  96                 (void *)(CAC_BASE + 0xa80) :
  97                 (void *)(CAC_BASE + 0x380);
  98         memcpy(base, &except_vec_nmi, 0x80);
  99         flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
 100 }
 101
 102 static void __init mips_ejtag_setup(void)
 103 {
 104         void *base;
 105         extern char except_vec_ejtag_debug;
 106
 107         base = cpu_has_veic ?
 108                 (void *)(CAC_BASE + 0xa00) :
 109                 (void *)(CAC_BASE + 0x300);
 110         memcpy(base, &except_vec_ejtag_debug, 0x80);
 111         flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
 112 }
 113
 114 phys_addr_t mips_cpc_default_phys_base(void)
 115 {
 116         return CPC_BASE_ADDR;
 117 }
 118
 119 void __init prom_init(void)
 120 {
 121         mips_display_message("LINUX");
 122
 123         /*
 124          * early setup of _pcictrl_bonito so that we can determine
 125          * the system controller on a CORE_EMUL board
 126          */
 127         _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
 128
 129         mips_revision_corid = MIPS_REVISION_CORID;
 130
 131         if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
 132                 if (BONITO_PCIDID == 0x0001df53 ||
 133                     BONITO_PCIDID == 0x0003df53)
 134                         mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
 135                 else
 136                         mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
 137         }
 138
 139         mips_revision_sconid = MIPS_REVISION_SCONID;
 140         if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) {
 141                 switch (mips_revision_corid) {
 142                 case MIPS_REVISION_CORID_QED_RM5261:
 143                 case MIPS_REVISION_CORID_CORE_LV:
 144                 case MIPS_REVISION_CORID_CORE_FPGA:
 145                 case MIPS_REVISION_CORID_CORE_FPGAR2:
 146                         mips_revision_sconid = MIPS_REVISION_SCON_GT64120;
 147                         break;
 148                 case MIPS_REVISION_CORID_CORE_EMUL_BON:
 149                 case MIPS_REVISION_CORID_BONITO64:
 150                 case MIPS_REVISION_CORID_CORE_20K:
 151                         mips_revision_sconid = MIPS_REVISION_SCON_BONITO;
 152                         break;
 153                 case MIPS_REVISION_CORID_CORE_MSC:
 154                 case MIPS_REVISION_CORID_CORE_FPGA2:
 155                 case MIPS_REVISION_CORID_CORE_24K:
 156                         /*
 157                          * SOCit/ROCit support is essentially identical
 158                          * but make an attempt to distinguish them
 159                          */
 160                         mips_revision_sconid = MIPS_REVISION_SCON_SOCIT;
 161                         break;
 162                 case MIPS_REVISION_CORID_CORE_FPGA3:
 163                 case MIPS_REVISION_CORID_CORE_FPGA4:
 164                 case MIPS_REVISION_CORID_CORE_FPGA5:
 165                 case MIPS_REVISION_CORID_CORE_EMUL_MSC:
 166                 default:
 167                         /* See above */
 168                         mips_revision_sconid = MIPS_REVISION_SCON_ROCIT;
 169                         break;
 170                 }
 171         }
 172
 173         switch (mips_revision_sconid) {
 174                 u32 start, map, mask, data;
 175
 176         case MIPS_REVISION_SCON_GT64120:
 177                 /*
 178                  * Setup the North bridge to do Master byte-lane swapping
 179                  * when running in bigendian.
 180                  */
 181                 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
 182
 183 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 184                 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
 185                          GT_PCI0_CMD_SBYTESWAP_BIT);
 186 #else
 187                 GT_WRITE(GT_PCI0_CMD_OFS, 0);
 188 #endif
 189                 /* Fix up PCI I/O mapping if necessary (for Atlas).  */
 190                 start = GT_READ(GT_PCI0IOLD_OFS);
 191                 map = GT_READ(GT_PCI0IOREMAP_OFS);
 192                 if ((start & map) != 0) {
 193                         map &= ~start;
 194                         GT_WRITE(GT_PCI0IOREMAP_OFS, map);
 195                 }
 196
 197                 set_io_port_base(MALTA_GT_PORT_BASE);
 198                 break;
 199
 200         case MIPS_REVISION_SCON_BONITO:
 201                 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
 202
 203                 /*
 204                  * Disable Bonito IOBC.
 205                  */
 206                 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
 207                         ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
 208                           BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
 209
 210                 /*
 211                  * Setup the North bridge to do Master byte-lane swapping
 212                  * when running in bigendian.
 213                  */
 214 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 215                 BONITO_BONGENCFG = BONITO_BONGENCFG &
 216                         ~(BONITO_BONGENCFG_MSTRBYTESWAP |
 217                           BONITO_BONGENCFG_BYTESWAP);
 218 #else
 219                 BONITO_BONGENCFG = BONITO_BONGENCFG |
 220                         BONITO_BONGENCFG_MSTRBYTESWAP |
 221                         BONITO_BONGENCFG_BYTESWAP;
 222 #endif
 223
 224                 set_io_port_base(MALTA_BONITO_PORT_BASE);
 225                 break;
 226
 227         case MIPS_REVISION_SCON_SOCIT:
 228         case MIPS_REVISION_SCON_ROCIT:
 229                 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
 230 mips_pci_controller:
 231                 mb();
 232                 MSC_READ(MSC01_PCI_CFG, data);
 233                 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
 234                 wmb();
 235
 236                 /* Fix up lane swapping.  */
 237 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 238                 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
 239 #else
 240                 MSC_WRITE(MSC01_PCI_SWAP,
 241                           MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
 242                           MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
 243                           MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
 244 #endif
 245 #ifndef CONFIG_EVA
 246                 /* Fix up target memory mapping.  */
 247                 MSC_READ(MSC01_PCI_BAR0, mask);
 248                 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK);
 249 #else
 250                 /*
 251                  * Setup the Malta max (2GB) memory for PCI DMA in host bridge
 252                  * in transparent addressing mode, starting from 0x80000000.
 253                  */
 254                 mask = PHYS_OFFSET | (1<<3);
 255                 MSC_WRITE(MSC01_PCI_BAR0, mask);
 256
 257                 mask = PHYS_OFFSET;
 258                 MSC_WRITE(MSC01_PCI_HEAD4, mask);
 259                 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask);
 260                 MSC_WRITE(MSC01_PCI_P2SCMAPL, mask);
 261 #endif
 262                 /* Don't handle target retries indefinitely.  */
 263                 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) ==
 264                     MSC01_PCI_CFG_MAXRTRY_MSK)
 265                         data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK <<
 266                                          MSC01_PCI_CFG_MAXRTRY_SHF)) |
 267                                ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) <<
 268                                 MSC01_PCI_CFG_MAXRTRY_SHF);
 269
 270                 wmb();
 271                 MSC_WRITE(MSC01_PCI_CFG, data);
 272                 mb();
 273
 274                 set_io_port_base(MALTA_MSC_PORT_BASE);
 275                 break;
 276
 277         case MIPS_REVISION_SCON_SOCITSC:
 278         case MIPS_REVISION_SCON_SOCITSCP:
 279                 _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000);
 280                 goto mips_pci_controller;
 281
 282         default:
 283                 /* Unknown system controller */
 284                 mips_display_message("SC Error");
 285                 while (1);      /* We die here... */
 286         }
 287         board_nmi_handler_setup = mips_nmi_setup;
 288         board_ejtag_handler_setup = mips_ejtag_setup;
 289
 290         fw_init_cmdline();
 291         fw_meminit();
 292 #ifdef CONFIG_SERIAL_8250_CONSOLE
 293         console_config();
 294 #endif
 295         /* Early detection of CMP support */
 296         mips_cm_probe();
 297         mips_cpc_probe();
 298
 299         if (!register_cps_smp_ops())
 300                 return;
 301         if (!register_cmp_smp_ops())
 302                 return;
 303         if (!register_vsmp_smp_ops())
 304                 return;
 305 }