arch/mips/mips-boards/generic/init.c

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
   4  *
   5  *  This program is free software; you can distribute it and/or modify it
   6  *  under the terms of the GNU General Public License (Version 2) as
   7  *  published by the Free Software Foundation.
   8  *
   9  *  This program is distributed in the hope it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  *  for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17  *
  18  * PROM library initialisation code.
  19  */
  20 #include <linux/config.h>
  21 #include <linux/init.h>
  22 #include <linux/string.h>
  23 #include <linux/kernel.h>
  24
  25 #include <asm/io.h>
  26 #include <asm/bootinfo.h>
  27 #include <asm/mips-boards/prom.h>
  28 #include <asm/mips-boards/generic.h>
  29 #ifdef CONFIG_MIPS_GT64120
  30 #include <asm/gt64120.h>
  31 #endif
  32 #include <asm/mips-boards/msc01_pci.h>
  33 #include <asm/mips-boards/bonito64.h>
  34 #ifdef CONFIG_MIPS_MALTA
  35 #include <asm/mips-boards/malta.h>
  36 #endif
  37
  38 #ifdef CONFIG_KGDB
  39 extern int rs_kgdb_hook(int, int);
  40 extern int rs_putDebugChar(char);
  41 extern char rs_getDebugChar(void);
  42 extern int saa9730_kgdb_hook(int);
  43 extern int saa9730_putDebugChar(char);
  44 extern char saa9730_getDebugChar(void);
  45 #endif
  46
  47 int prom_argc;
  48 int *_prom_argv, *_prom_envp;
  49
  50 /*
  51  * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
  52  * This macro take care of sign extension, if running in 64-bit mode.
  53  */
  54 #define prom_envp(index) ((char *)(long)_prom_envp[(index)])
  55
  56 int init_debug = 0;
  57
  58 unsigned int mips_revision_corid;
  59
  60 /* Bonito64 system controller register base. */
  61 unsigned long _pcictrl_bonito;
  62 unsigned long _pcictrl_bonito_pcicfg;
  63
  64 /* GT64120 system controller register base */
  65 unsigned long _pcictrl_gt64120;
  66
  67 /* MIPS System controller register base */
  68 unsigned long _pcictrl_msc;
  69
  70 char *prom_getenv(char *envname)
  71 {
  72         /*
  73          * Return a pointer to the given environment variable.
  74          * In 64-bit mode: we're using 64-bit pointers, but all pointers
  75          * in the PROM structures are only 32-bit, so we need some
  76          * workarounds, if we are running in 64-bit mode.
  77          */
  78         int i, index=0;
  79
  80         i = strlen(envname);
  81
  82         while (prom_envp(index)) {
  83                 if(strncmp(envname, prom_envp(index), i) == 0) {
  84                         return(prom_envp(index+1));
  85                 }
  86                 index += 2;
  87         }
  88
  89         return NULL;
  90 }
  91
  92 static inline unsigned char str2hexnum(unsigned char c)
  93 {
  94         if (c >= '0' && c <= '9')
  95                 return c - '0';
  96         if (c >= 'a' && c <= 'f')
  97                 return c - 'a' + 10;
  98         return 0; /* foo */
  99 }
 100
 101 static inline void str2eaddr(unsigned char *ea, unsigned char *str)
 102 {
 103         int i;
 104
 105         for (i = 0; i < 6; i++) {
 106                 unsigned char num;
 107
 108                 if((*str == '.') || (*str == ':'))
 109                         str++;
 110                 num = str2hexnum(*str++) << 4;
 111                 num |= (str2hexnum(*str++));
 112                 ea[i] = num;
 113         }
 114 }
 115
 116 int get_ethernet_addr(char *ethernet_addr)
 117 {
 118         char *ethaddr_str;
 119
 120         ethaddr_str = prom_getenv("ethaddr");
 121         if (!ethaddr_str) {
 122                 printk("ethaddr not set in boot prom\n");
 123                 return -1;
 124         }
 125         str2eaddr(ethernet_addr, ethaddr_str);
 126
 127         if (init_debug > 1) {
 128                 int i;
 129                 printk("get_ethernet_addr: ");
 130                 for (i=0; i<5; i++)
 131                         printk("%02x:", (unsigned char)*(ethernet_addr+i));
 132                 printk("%02x\n", *(ethernet_addr+i));
 133         }
 134
 135         return 0;
 136 }
 137
 138 #ifdef CONFIG_SERIAL_8250_CONSOLE
 139 static void __init console_config(void)
 140 {
 141         char console_string[40];
 142         int baud = 0;
 143         char parity = '\0', bits = '\0', flow = '\0';
 144         char *s;
 145
 146         if ((strstr(prom_getcmdline(), "console=ttyS")) == NULL) {
 147                 s = prom_getenv("modetty0");
 148                 if (s) {
 149                         while (*s >= '0' && *s <= '9')
 150                                 baud = baud*10 + *s++ - '0';
 151                         if (*s == ',') s++;
 152                         if (*s) parity = *s++;
 153                         if (*s == ',') s++;
 154                         if (*s) bits = *s++;
 155                         if (*s == ',') s++;
 156                         if (*s == 'h') flow = 'r';
 157                 }
 158                 if (baud == 0)
 159                         baud = 38400;
 160                 if (parity != 'n' && parity != 'o' && parity != 'e')
 161                         parity = 'n';
 162                 if (bits != '7' && bits != '8')
 163                         bits = '8';
 164                 if (flow == '\0')
 165                         flow = 'r';
 166                 sprintf (console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow);
 167                 strcat (prom_getcmdline(), console_string);
 168                 prom_printf("Config serial console:%s\n", console_string);
 169         }
 170 }
 171 #endif
 172
 173 #ifdef CONFIG_KGDB
 174 void __init kgdb_config (void)
 175 {
 176         extern int (*generic_putDebugChar)(char);
 177         extern char (*generic_getDebugChar)(void);
 178         char *argptr;
 179         int line, speed;
 180
 181         argptr = prom_getcmdline();
 182         if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
 183                 argptr += strlen("kgdb=ttyS");
 184                 if (*argptr != '0' && *argptr != '1')
 185                         printk("KGDB: Unknown serial line /dev/ttyS%c, "
 186                                "falling back to /dev/ttyS1\n", *argptr);
 187                 line = *argptr == '0' ? 0 : 1;
 188                 printk("KGDB: Using serial line /dev/ttyS%d for session\n", line);
 189
 190                 speed = 0;
 191                 if (*++argptr == ',')
 192                 {
 193                         int c;
 194                         while ((c = *++argptr) && ('0' <= c && c <= '9'))
 195                                 speed = speed * 10 + c - '0';
 196                 }
 197 #ifdef CONFIG_MIPS_ATLAS
 198                 if (line == 1) {
 199                         speed = saa9730_kgdb_hook(speed);
 200                         generic_putDebugChar = saa9730_putDebugChar;
 201                         generic_getDebugChar = saa9730_getDebugChar;
 202                 }
 203                 else
 204 #endif
 205                 {
 206                         speed = rs_kgdb_hook(line, speed);
 207                         generic_putDebugChar = rs_putDebugChar;
 208                         generic_getDebugChar = rs_getDebugChar;
 209                 }
 210
 211                 prom_printf("KGDB: Using serial line /dev/ttyS%d at %d for session, "
 212                             "please connect your debugger\n", line ? 1 : 0, speed);
 213
 214                 {
 215                         char *s;
 216                         for (s = "Please connect GDB to this port\r\n"; *s; )
 217                                 generic_putDebugChar (*s++);
 218                 }
 219
 220                 kgdb_enabled = 1;
 221                 /* Breakpoint is invoked after interrupts are initialised */
 222         }
 223 }
 224 #endif
 225
 226 void __init prom_init(void)
 227 {
 228         prom_argc = fw_arg0;
 229         _prom_argv = (int *) fw_arg1;
 230         _prom_envp = (int *) fw_arg2;
 231
 232         mips_display_message("LINUX");
 233
 234 #ifdef CONFIG_MIPS_SEAD
 235         set_io_port_base(KSEG1);
 236 #else
 237         /*
 238          * early setup of _pcictrl_bonito so that we can determine
 239          * the system controller on a CORE_EMUL board
 240          */
 241         _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
 242
 243         mips_revision_corid = MIPS_REVISION_CORID;
 244
 245         if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
 246                 if (BONITO_PCIDID == 0x0001df53 ||
 247                     BONITO_PCIDID == 0x0003df53)
 248                         mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
 249                 else
 250                         mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
 251         }
 252         switch(mips_revision_corid) {
 253         case MIPS_REVISION_CORID_QED_RM5261:
 254         case MIPS_REVISION_CORID_CORE_LV:
 255         case MIPS_REVISION_CORID_CORE_FPGA:
 256         case MIPS_REVISION_CORID_CORE_FPGAR2:
 257                 /*
 258                  * Setup the North bridge to do Master byte-lane swapping
 259                  * when running in bigendian.
 260                  */
 261                 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
 262
 263 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 264                 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
 265                          GT_PCI0_CMD_SBYTESWAP_BIT);
 266 #else
 267                 GT_WRITE(GT_PCI0_CMD_OFS, 0);
 268 #endif
 269
 270 #ifdef CONFIG_MIPS_MALTA
 271                 set_io_port_base(MALTA_GT_PORT_BASE);
 272 #else
 273                 set_io_port_base((unsigned long)ioremap(0, 0x20000000));
 274 #endif
 275                 break;
 276
 277         case MIPS_REVISION_CORID_CORE_EMUL_BON:
 278         case MIPS_REVISION_CORID_BONITO64:
 279         case MIPS_REVISION_CORID_CORE_20K:
 280                 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
 281
 282                 /*
 283                  * Disable Bonito IOBC.
 284                  */
 285                 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
 286                         ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
 287                           BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
 288
 289                 /*
 290                  * Setup the North bridge to do Master byte-lane swapping
 291                  * when running in bigendian.
 292                  */
 293 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 294                 BONITO_BONGENCFG = BONITO_BONGENCFG &
 295                         ~(BONITO_BONGENCFG_MSTRBYTESWAP |
 296                           BONITO_BONGENCFG_BYTESWAP);
 297 #else
 298                 BONITO_BONGENCFG = BONITO_BONGENCFG |
 299                         BONITO_BONGENCFG_MSTRBYTESWAP |
 300                         BONITO_BONGENCFG_BYTESWAP;
 301 #endif
 302
 303 #ifdef CONFIG_MIPS_MALTA
 304                 set_io_port_base(MALTA_BONITO_PORT_BASE);
 305 #else
 306                 set_io_port_base((unsigned long)ioremap(0, 0x20000000));
 307 #endif
 308                 break;
 309
 310         case MIPS_REVISION_CORID_CORE_MSC:
 311         case MIPS_REVISION_CORID_CORE_FPGA2:
 312         case MIPS_REVISION_CORID_CORE_EMUL_MSC:
 313                 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
 314
 315 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 316                 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
 317 #else
 318                 MSC_WRITE(MSC01_PCI_SWAP,
 319                           MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
 320                           MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
 321                           MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
 322 #endif
 323
 324 #ifdef CONFIG_MIPS_MALTA
 325                 set_io_port_base(MALTA_MSC_PORT_BASE);
 326 #else
 327                 set_io_port_base((unsigned long)ioremap(0, 0x20000000));
 328 #endif
 329                 break;
 330
 331         default:
 332                 /* Unknown Core card */
 333                 mips_display_message("CC Error");
 334                 while(1);   /* We die here... */
 335         }
 336 #endif
 337         prom_printf("\nLINUX started...\n");
 338         prom_init_cmdline();
 339         prom_meminit();
 340 #ifdef CONFIG_SERIAL_8250_CONSOLE
 341         console_config();
 342 #endif
 343 }