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