arch/mips/pmcs-msp71xx/msp_prom.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *    PROM library initialisation code, assuming a version of
   4  *    pmon is the boot code.
   5  *
   6  * Copyright 2000,2001 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ppopov@mvista.com or source@mvista.com
   9  *
  10  * This file was derived from Carsten Langgaard's
  11  * arch/mips/mips-boards/xx files.
  12  *
  13  * Carsten Langgaard, carstenl@mips.com
  14  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  15  *
  16  *  This program is free software; you can redistribute  it and/or modify it
  17  *  under  the terms of  the GNU General  Public License as published by the
  18  *  Free Software Foundation;  either version 2 of the  License, or (at your
  19  *  option) any later version.
  20  *
  21  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  22  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  23  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  24  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  25  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  27  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  28  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  29  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  *  You should have received a copy of the  GNU General Public License along
  33  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  34  *  675 Mass Ave, Cambridge, MA 02139, USA.
  35  */
  36
  37 #include <linux/module.h>
  38 #include <linux/kernel.h>
  39 #include <linux/init.h>
  40 #include <linux/string.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/mm.h>
  43 #include <linux/slab.h>
  44
  45 #include <asm/addrspace.h>
  46 #include <asm/bootinfo.h>
  47 #include <asm-generic/sections.h>
  48 #include <asm/page.h>
  49
  50 #include <msp_prom.h>
  51 #include <msp_regs.h>
  52
  53 /* global PROM environment variables and pointers */
  54 int prom_argc;
  55 char **prom_argv, **prom_envp;
  56 int *prom_vec;
  57
  58 /* debug flag */
  59 int init_debug = 1;
  60
  61 /* memory blocks */
  62 struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
  63
  64 /* default feature sets */
  65 static char msp_default_features[] =
  66 #if defined(CONFIG_PMC_MSP4200_EVAL) \
  67  || defined(CONFIG_PMC_MSP4200_GW)
  68         "ERER";
  69 #elif defined(CONFIG_PMC_MSP7120_EVAL) \
  70  || defined(CONFIG_PMC_MSP7120_GW)
  71         "EMEMSP";
  72 #elif defined(CONFIG_PMC_MSP7120_FPGA)
  73         "EMEM";
  74 #endif
  75
  76 /* conversion functions */
  77 static inline unsigned char str2hexnum(unsigned char c)
  78 {
  79         if (c >= '0' && c <= '9')
  80                 return c - '0';
  81         if (c >= 'a' && c <= 'f')
  82                 return c - 'a' + 10;
  83         return 0; /* foo */
  84 }
  85
  86 int str2eaddr(unsigned char *ea, unsigned char *str)
  87 {
  88         int index = 0;
  89         unsigned char num = 0;
  90
  91         while (*str != '\0') {
  92                 if ((*str == '.') || (*str == ':')) {
  93                         ea[index++] = num;
  94                         num = 0;
  95                         str++;
  96                 } else {
  97                         num = num << 4;
  98                         num |= str2hexnum(*str++);
  99                 }
 100         }
 101
 102         if (index == 5) {
 103                 ea[index++] = num;
 104                 return 0;
 105         } else
 106                 return -1;
 107 }
 108 EXPORT_SYMBOL(str2eaddr);
 109
 110 static inline unsigned long str2hex(unsigned char *str)
 111 {
 112         int value = 0;
 113
 114         while (*str) {
 115                 value = value << 4;
 116                 value |= str2hexnum(*str++);
 117         }
 118
 119         return value;
 120 }
 121
 122 /* function to query the system information */
 123 const char *get_system_type(void)
 124 {
 125 #if defined(CONFIG_PMC_MSP4200_EVAL)
 126         return "PMC-Sierra MSP4200 Eval Board";
 127 #elif defined(CONFIG_PMC_MSP4200_GW)
 128         return "PMC-Sierra MSP4200 VoIP Gateway";
 129 #elif defined(CONFIG_PMC_MSP7120_EVAL)
 130         return "PMC-Sierra MSP7120 Eval Board";
 131 #elif defined(CONFIG_PMC_MSP7120_GW)
 132         return "PMC-Sierra MSP7120 Residential Gateway";
 133 #elif defined(CONFIG_PMC_MSP7120_FPGA)
 134         return "PMC-Sierra MSP7120 FPGA";
 135 #else
 136         #error "What is the type of *your* MSP?"
 137 #endif
 138 }
 139
 140 int get_ethernet_addr(char *ethaddr_name, char *ethernet_addr)
 141 {
 142         char *ethaddr_str;
 143
 144         ethaddr_str = prom_getenv(ethaddr_name);
 145         if (!ethaddr_str) {
 146                 printk(KERN_WARNING "%s not set in boot prom\n", ethaddr_name);
 147                 return -1;
 148         }
 149
 150         if (str2eaddr(ethernet_addr, ethaddr_str) == -1) {
 151                 printk(KERN_WARNING "%s badly formatted-<%s>\n",
 152                         ethaddr_name, ethaddr_str);
 153                 return -1;
 154         }
 155
 156         if (init_debug > 1) {
 157                 int i;
 158                 printk(KERN_DEBUG "get_ethernet_addr: for %s ", ethaddr_name);
 159                 for (i = 0; i < 5; i++)
 160                         printk(KERN_DEBUG "%02x:",
 161                                 (unsigned char)*(ethernet_addr+i));
 162                 printk(KERN_DEBUG "%02x\n", *(ethernet_addr+i));
 163         }
 164
 165         return 0;
 166 }
 167 EXPORT_SYMBOL(get_ethernet_addr);
 168
 169 static char *get_features(void)
 170 {
 171         char *feature = prom_getenv(FEATURES);
 172
 173         if (feature == NULL) {
 174                 /* default features based on MACHINE_TYPE */
 175                 feature = msp_default_features;
 176         }
 177
 178         return feature;
 179 }
 180
 181 static char test_feature(char c)
 182 {
 183         char *feature = get_features();
 184
 185         while (*feature) {
 186                 if (*feature++ == c)
 187                         return *feature;
 188                 feature++;
 189         }
 190
 191         return FEATURE_NOEXIST;
 192 }
 193
 194 unsigned long get_deviceid(void)
 195 {
 196         char *deviceid = prom_getenv(DEVICEID);
 197
 198         if (deviceid == NULL)
 199                 return *DEV_ID_REG;
 200         else
 201                 return str2hex(deviceid);
 202 }
 203
 204 char identify_pci(void)
 205 {
 206         return test_feature(PCI_KEY);
 207 }
 208 EXPORT_SYMBOL(identify_pci);
 209
 210 char identify_pcimux(void)
 211 {
 212         return test_feature(PCIMUX_KEY);
 213 }
 214
 215 char identify_sec(void)
 216 {
 217         return test_feature(SEC_KEY);
 218 }
 219 EXPORT_SYMBOL(identify_sec);
 220
 221 char identify_spad(void)
 222 {
 223         return test_feature(SPAD_KEY);
 224 }
 225 EXPORT_SYMBOL(identify_spad);
 226
 227 char identify_tdm(void)
 228 {
 229         return test_feature(TDM_KEY);
 230 }
 231 EXPORT_SYMBOL(identify_tdm);
 232
 233 char identify_zsp(void)
 234 {
 235         return test_feature(ZSP_KEY);
 236 }
 237 EXPORT_SYMBOL(identify_zsp);
 238
 239 static char identify_enetfeature(char key, unsigned long interface_num)
 240 {
 241         char *feature = get_features();
 242
 243         while (*feature) {
 244                 if (*feature++ == key && interface_num-- == 0)
 245                         return *feature;
 246                 feature++;
 247         }
 248
 249         return FEATURE_NOEXIST;
 250 }
 251
 252 char identify_enet(unsigned long interface_num)
 253 {
 254         return identify_enetfeature(ENET_KEY, interface_num);
 255 }
 256 EXPORT_SYMBOL(identify_enet);
 257
 258 char identify_enetTxD(unsigned long interface_num)
 259 {
 260         return identify_enetfeature(ENETTXD_KEY, interface_num);
 261 }
 262 EXPORT_SYMBOL(identify_enetTxD);
 263
 264 unsigned long identify_family(void)
 265 {
 266         unsigned long deviceid;
 267
 268         deviceid = get_deviceid();
 269
 270         return deviceid & CPU_DEVID_FAMILY;
 271 }
 272 EXPORT_SYMBOL(identify_family);
 273
 274 unsigned long identify_revision(void)
 275 {
 276         unsigned long deviceid;
 277
 278         deviceid = get_deviceid();
 279
 280         return deviceid & CPU_DEVID_REVISION;
 281 }
 282 EXPORT_SYMBOL(identify_revision);
 283
 284 /* PROM environment functions */
 285 char *prom_getenv(char *env_name)
 286 {
 287         /*
 288          * Return a pointer to the given environment variable.  prom_envp
 289          * points to a null terminated array of pointers to variables.
 290          * Environment variables are stored in the form of "memsize=64"
 291          */
 292
 293         char **var = prom_envp;
 294         int i = strlen(env_name);
 295
 296         while (*var) {
 297                 if (strncmp(env_name, *var, i) == 0) {
 298                         return (*var + strlen(env_name) + 1);
 299                 }
 300                 var++;
 301         }
 302
 303         return NULL;
 304 }
 305
 306 /* PROM commandline functions */
 307 void  __init prom_init_cmdline(void)
 308 {
 309         char *cp;
 310         int actr;
 311
 312         actr = 1; /* Always ignore argv[0] */
 313
 314         cp = &(arcs_cmdline[0]);
 315         while (actr < prom_argc) {
 316                 strcpy(cp, prom_argv[actr]);
 317                 cp += strlen(prom_argv[actr]);
 318                 *cp++ = ' ';
 319                 actr++;
 320         }
 321         if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
 322                 --cp;
 323         *cp = '\0';
 324 }
 325
 326 /* memory allocation functions */
 327 static int __init prom_memtype_classify(unsigned int type)
 328 {
 329         switch (type) {
 330         case yamon_free:
 331                 return BOOT_MEM_RAM;
 332         case yamon_prom:
 333                 return BOOT_MEM_ROM_DATA;
 334         default:
 335                 return BOOT_MEM_RESERVED;
 336         }
 337 }
 338
 339 void __init prom_meminit(void)
 340 {
 341         struct prom_pmemblock *p;
 342
 343         p = prom_getmdesc();
 344
 345         while (p->size) {
 346                 long type;
 347                 unsigned long base, size;
 348
 349                 type = prom_memtype_classify(p->type);
 350                 base = p->base;
 351                 size = p->size;
 352
 353                 add_memory_region(base, size, type);
 354                 p++;
 355         }
 356 }
 357
 358 void __init prom_free_prom_memory(void)
 359 {
 360         int     argc;
 361         char    **argv;
 362         char    **envp;
 363         char    *ptr;
 364         int     len = 0;
 365         int     i;
 366         unsigned long addr;
 367
 368         /*
 369          * preserve environment variables and command line from pmon/bbload
 370          * first preserve the command line
 371          */
 372         for (argc = 0; argc < prom_argc; argc++) {
 373                 len += sizeof(char *);                  /* length of pointer */
 374                 len += strlen(prom_argv[argc]) + 1;     /* length of string */
 375         }
 376         len += sizeof(char *);          /* plus length of null pointer */
 377
 378         argv = kmalloc(len, GFP_KERNEL);
 379         ptr = (char *) &argv[prom_argc + 1];    /* strings follow array */
 380
 381         for (argc = 0; argc < prom_argc; argc++) {
 382                 argv[argc] = ptr;
 383                 strcpy(ptr, prom_argv[argc]);
 384                 ptr += strlen(prom_argv[argc]) + 1;
 385         }
 386         argv[prom_argc] = NULL;         /* end array with null pointer */
 387         prom_argv = argv;
 388
 389         /* next preserve the environment variables */
 390         len = 0;
 391         i = 0;
 392         for (envp = prom_envp; *envp != NULL; envp++) {
 393                 i++;            /* count number of environment variables */
 394                 len += sizeof(char *);          /* length of pointer */
 395                 len += strlen(*envp) + 1;       /* length of string */
 396         }
 397         len += sizeof(char *);          /* plus length of null pointer */
 398
 399         envp = kmalloc(len, GFP_KERNEL);
 400         ptr = (char *) &envp[i+1];
 401
 402         for (argc = 0; argc < i; argc++) {
 403                 envp[argc] = ptr;
 404                 strcpy(ptr, prom_envp[argc]);
 405                 ptr += strlen(prom_envp[argc]) + 1;
 406         }
 407         envp[i] = NULL;                 /* end array with null pointer */
 408         prom_envp = envp;
 409
 410         for (i = 0; i < boot_mem_map.nr_map; i++) {
 411                 if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
 412                         continue;
 413
 414                 addr = boot_mem_map.map[i].addr;
 415                 free_init_pages("prom memory",
 416                                 addr, addr + boot_mem_map.map[i].size);
 417         }
 418 }
 419
 420 struct prom_pmemblock *__init prom_getmdesc(void)
 421 {
 422         static char     memsz_env[] __initdata = "memsize";
 423         static char     heaptop_env[] __initdata = "heaptop";
 424         char            *str;
 425         unsigned int    memsize;
 426         unsigned int    heaptop;
 427         int i;
 428
 429         str = prom_getenv(memsz_env);
 430         if (!str) {
 431                 ppfinit("memsize not set in boot prom, "
 432                         "set to default (32Mb)\n");
 433                 memsize = 0x02000000;
 434         } else {
 435                 memsize = simple_strtol(str, NULL, 0);
 436
 437                 if (memsize == 0) {
 438                         /* if memsize is a bad size, use reasonable default */
 439                         memsize = 0x02000000;
 440                 }
 441
 442                 /* convert to physical address (removing caching bits, etc) */
 443                 memsize = CPHYSADDR(memsize);
 444         }
 445
 446         str = prom_getenv(heaptop_env);
 447         if (!str) {
 448                 heaptop = CPHYSADDR((u32)&_text);
 449                 ppfinit("heaptop not set in boot prom, "
 450                         "set to default 0x%08x\n", heaptop);
 451         } else {
 452                 heaptop = simple_strtol(str, NULL, 16);
 453                 if (heaptop == 0) {
 454                         /* heaptop conversion bad, might have 0xValue */
 455                         heaptop = simple_strtol(str, NULL, 0);
 456
 457                         if (heaptop == 0) {
 458                                 /* heaptop still bad, use reasonable default */
 459                                 heaptop = CPHYSADDR((u32)&_text);
 460                         }
 461                 }
 462
 463                 /* convert to physical address (removing caching bits, etc) */
 464                 heaptop = CPHYSADDR((u32)heaptop);
 465         }
 466
 467         /* the base region */
 468         i = 0;
 469         mdesc[i].type = BOOT_MEM_RESERVED;
 470         mdesc[i].base = 0x00000000;
 471         mdesc[i].size = PAGE_ALIGN(0x300 + 0x80);
 472                 /* jtag interrupt vector + sizeof vector */
 473
 474         /* PMON data */
 475         if (heaptop > mdesc[i].base + mdesc[i].size) {
 476                 i++;                    /* 1 */
 477                 mdesc[i].type = BOOT_MEM_ROM_DATA;
 478                 mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
 479                 mdesc[i].size = heaptop - mdesc[i].base;
 480         }
 481
 482         /* end of PMON data to start of kernel -- probably zero .. */
 483         if (heaptop != CPHYSADDR((u32)_text)) {
 484                 i++;    /* 2 */
 485                 mdesc[i].type = BOOT_MEM_RAM;
 486                 mdesc[i].base = heaptop;
 487                 mdesc[i].size = CPHYSADDR((u32)_text) - mdesc[i].base;
 488         }
 489
 490         /*  kernel proper */
 491         i++;                    /* 3 */
 492         mdesc[i].type = BOOT_MEM_RESERVED;
 493         mdesc[i].base = CPHYSADDR((u32)_text);
 494         mdesc[i].size = CPHYSADDR(PAGE_ALIGN((u32)_end)) - mdesc[i].base;
 495
 496         /* Remainder of RAM -- under memsize */
 497         i++;                    /* 5 */
 498         mdesc[i].type = yamon_free;
 499         mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
 500         mdesc[i].size = memsize - mdesc[i].base;
 501
 502         return &mdesc[0];
 503 }