target/linux/brcm47xx/files-2.6.23/arch/mips/cfe/cfe.c

   1 /*
   2  * Broadcom Common Firmware Environment (CFE) support
   3  *
   4  * Copyright 2000, 2001, 2002
   5  * Broadcom Corporation. All rights reserved.
   6  *
   7  * Copyright (C) 2006 Michael Buesch
   8  *
   9  * Original Authors:  Mitch Lichtenberg, Chris Demetriou
  10  *
  11  * This software is furnished under license and may be used and copied only
  12  * in accordance with the following terms and conditions.  Subject to these
  13  * conditions, you may download, copy, install, use, modify and distribute
  14  * modified or unmodified copies of this software in source and/or binary
  15  * form. No title or ownership is transferred hereby.
  16  *
  17  * 1) Any source code used, modified or distributed must reproduce and
  18  *    retain this copyright notice and list of conditions as they appear in
  19  *    the source file.
  20  *
  21  * 2) No right is granted to use any trade name, trademark, or logo of
  22  *    Broadcom Corporation.  The "Broadcom Corporation" name may not be
  23  *    used to endorse or promote products derived from this software
  24  *    without the prior written permission of Broadcom Corporation.
  25  *
  26  * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
  27  *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
  28  *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
  29  *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
  30  *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
  31  *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32  *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33  *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  34  *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  35  *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  36  *    OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include <linux/init.h>
  40 #include <linux/string.h>
  41 #include <linux/errno.h>
  42 #include <linux/spinlock.h>
  43 #include <asm/cfe.h>
  44
  45 #include "cfe_private.h"
  46
  47
  48 static cfe_uint_t cfe_handle;
  49 static int (*cfe_trampoline)(long handle, long iocb);
  50
  51
  52 #include <linux/kernel.h>
  53
  54 void __init cfe_setup(unsigned long fwarg0, unsigned long fwarg1,
  55                       unsigned long fwarg2, unsigned long fwarg3)
  56 {
  57         if (fwarg3 == 0x80300000) {
  58                 /* WRT54G workaround */
  59                 fwarg3 = CFE_EPTSEAL;
  60                 fwarg2 = 0xBFC00500;
  61         }
  62         if (fwarg3 != CFE_EPTSEAL) {
  63                 /* We are not booted from CFE */
  64                 return;
  65         }
  66         if (fwarg1 == 0) {
  67                 /* We are on the boot CPU */
  68                 cfe_handle = (cfe_uint_t)fwarg0;
  69                 cfe_trampoline = CFE_TO_PTR(fwarg2);
  70         }
  71 }
  72
  73 int cfe_vprintk(const char *fmt, va_list args)
  74 {
  75         static char buffer[1024];
  76         static DEFINE_SPINLOCK(lock);
  77         static const char pfx[] = "CFE-console: ";
  78         static const size_t pfx_len = sizeof(pfx) - 1;
  79         unsigned long flags;
  80         int len, cnt, pos;
  81         int handle;
  82         int res;
  83
  84         if (!cfe_present())
  85                 return -ENODEV;
  86
  87         spin_lock_irqsave(&lock, flags);
  88         handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
  89         if (CFE_ISERR(handle)) {
  90                 len = -EIO;
  91                 goto out;
  92         }
  93         strcpy(buffer, pfx);
  94         len = vscnprintf(buffer + pfx_len,
  95                          sizeof(buffer) - pfx_len - 2,
  96                          fmt, args);
  97         len += pfx_len;
  98         /* The CFE console requires CR-LF line-ends.
  99          * Add a CR, if we only terminate lines with a LF.
 100          * This does only fix CR-LF at the end of the string.
 101          * So for multiple lines, use multiple cfe_vprintk calls.
 102          */
 103         if (len > 1 &&
 104             buffer[len - 1] == '\n' && buffer[len - 2] != '\r') {
 105                 buffer[len - 1] = '\r';
 106                 buffer[len] = '\n';
 107                 len += 1;
 108         }
 109         cnt = len;
 110         pos = 0;
 111         while (cnt > 0) {
 112                 res = cfe_write(handle, buffer + pos, len - pos);
 113                 if (CFE_ISERR(res)) {
 114                         len = -EIO;
 115                         goto out;
 116                 }
 117                 cnt -= res;
 118                 pos += res;
 119         }
 120 out:
 121         spin_unlock_irqrestore(&lock, flags);
 122
 123         return len;
 124 }
 125
 126 int cfe_printk(const char *fmt, ...)
 127 {
 128         va_list args;
 129         int res;
 130
 131         va_start(args, fmt);
 132         res = cfe_vprintk(fmt, args);
 133         va_end(args);
 134
 135         return res;
 136 }
 137
 138 static int cfe_iocb_dispatch(struct cfe_iocb *iocb)
 139 {
 140         if (!cfe_present())
 141                 return CFE_ERR_UNSUPPORTED;
 142         return cfe_trampoline((long)cfe_handle, (long)iocb);
 143 }
 144
 145 int cfe_present(void)
 146 {
 147         return (cfe_trampoline != NULL);
 148 }
 149
 150 int cfe_close(int handle)
 151 {
 152         struct cfe_iocb iocb;
 153         int err;
 154
 155         memset(&iocb, 0, sizeof(iocb));
 156         iocb.fcode = CFE_CMD_DEV_CLOSE;
 157         iocb.handle = handle;
 158
 159         err = cfe_iocb_dispatch(&iocb);
 160
 161         return (CFE_ISERR(err)) ? err : iocb.status;
 162 }
 163
 164 int cfe_cpu_start(int cpu, void (*fn)(void), long sp, long gp, long a1)
 165 {
 166         struct cfe_iocb iocb;
 167         int err;
 168
 169         memset(&iocb, 0, sizeof(iocb));
 170         iocb.fcode = CFE_CMD_FW_CPUCTL;
 171         iocb.psize = sizeof(struct cfe_iocb_cpuctl);
 172         iocb.cpuctl.number = cpu;
 173         iocb.cpuctl.command = CFE_CPU_CMD_START;
 174         iocb.cpuctl.gp = gp;
 175         iocb.cpuctl.sp = sp;
 176         iocb.cpuctl.a1 = a1;
 177         iocb.cpuctl.start_addr = (long)fn;
 178
 179         err = cfe_iocb_dispatch(&iocb);
 180
 181         return (CFE_ISERR(err)) ? err : iocb.status;
 182 }
 183
 184 int cfe_cpu_stop(int cpu)
 185 {
 186         struct cfe_iocb iocb;
 187         int err;
 188
 189         memset(&iocb, 0, sizeof(iocb));
 190         iocb.fcode = CFE_CMD_FW_CPUCTL;
 191         iocb.psize = sizeof(struct cfe_iocb_cpuctl);
 192         iocb.cpuctl.number = cpu;
 193         iocb.cpuctl.command = CFE_CPU_CMD_STOP;
 194
 195         err = cfe_iocb_dispatch(&iocb);
 196
 197         return (CFE_ISERR(err)) ? err : iocb.status;
 198 }
 199
 200 int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
 201 {
 202         struct cfe_iocb iocb;
 203         int err;
 204
 205         memset(&iocb, 0, sizeof(iocb));
 206         iocb.fcode = CFE_CMD_ENV_ENUM;
 207         iocb.psize = sizeof(struct cfe_iocb_envbuf);
 208         iocb.envbuf.index = idx;
 209         iocb.envbuf.name = PTR_TO_CFE(name);
 210         iocb.envbuf.name_len = namelen;
 211         iocb.envbuf.val = PTR_TO_CFE(val);
 212         iocb.envbuf.val_len = vallen;
 213
 214         err = cfe_iocb_dispatch(&iocb);
 215
 216         return (CFE_ISERR(err)) ? err : iocb.status;
 217 }
 218
 219 int cfe_enumdev(int idx, char *name, int namelen)
 220 {
 221         struct cfe_iocb iocb;
 222         int err;
 223
 224         memset(&iocb, 0, sizeof(iocb));
 225
 226         iocb.fcode = CFE_CMD_DEV_ENUM;
 227         iocb.psize = sizeof(struct cfe_iocb_envbuf);
 228         iocb.envbuf.index = idx;
 229         iocb.envbuf.name = PTR_TO_CFE(name);
 230         iocb.envbuf.name_len = namelen;
 231
 232         err = cfe_iocb_dispatch(&iocb);
 233
 234         return (CFE_ISERR(err)) ? err : iocb.status;
 235 }
 236
 237 int cfe_enummem(int idx, int flags, u64 *start, u64 *length,
 238                 u64 *type)
 239 {
 240         struct cfe_iocb iocb;
 241         int err;
 242
 243         memset(&iocb, 0, sizeof(iocb));
 244
 245         iocb.fcode = CFE_CMD_FW_MEMENUM;
 246         iocb.flags = flags;
 247         iocb.psize = sizeof(struct cfe_iocb_meminfo);
 248         iocb.meminfo.index = idx;
 249
 250         err = cfe_iocb_dispatch(&iocb);
 251         if (CFE_ISERR(err))
 252                 return err;
 253         if (!CFE_ISERR(iocb.status)) {
 254                 *start = iocb.meminfo.addr;
 255                 *length = iocb.meminfo.size;
 256                 *type = iocb.meminfo.type;
 257         }
 258
 259         return iocb.status;
 260 }
 261
 262 int cfe_exit(int warm, int status)
 263 {
 264         struct cfe_iocb iocb;
 265         int err;
 266
 267 printk("CFE REBOOT\n");
 268         memset(&iocb, 0, sizeof(iocb));
 269         iocb.fcode = CFE_CMD_FW_RESTART;
 270         if (warm)
 271                 iocb.flags = CFE_FLG_WARMSTART;
 272         iocb.psize = sizeof(struct cfe_iocb_exitstat);
 273         iocb.exitstat.status = status;
 274
 275 printk("CALL\n");
 276         err = cfe_iocb_dispatch(&iocb);
 277 printk("DONE\n");
 278
 279         return (CFE_ISERR(err)) ? err : iocb.status;
 280 }
 281
 282 int cfe_flushcache(int flags)
 283 {
 284         struct cfe_iocb iocb;
 285         int err;
 286
 287         memset(&iocb, 0, sizeof(iocb));
 288         iocb.fcode = CFE_CMD_FW_FLUSHCACHE;
 289         iocb.flags = flags;
 290
 291         err = cfe_iocb_dispatch(&iocb);
 292
 293         return (CFE_ISERR(err)) ? err : iocb.status;
 294 }
 295
 296 int cfe_getdevinfo(char *name)
 297 {
 298         struct cfe_iocb iocb;
 299         int err;
 300
 301         memset(&iocb, 0, sizeof(iocb));
 302         iocb.fcode = CFE_CMD_DEV_GETINFO;
 303         iocb.psize = sizeof(struct cfe_iocb_buf);
 304         iocb.buffer.ptr = PTR_TO_CFE(name);
 305         iocb.buffer.length = strlen(name);
 306
 307         err = cfe_iocb_dispatch(&iocb);
 308         if (CFE_ISERR(err))
 309                 return err;
 310         if (CFE_ISERR(iocb.status))
 311                 return iocb.status;
 312
 313         return iocb.buffer.devflags;
 314 }
 315
 316 int cfe_getenv(char *name, char *dest, int destlen)
 317 {
 318         struct cfe_iocb iocb;
 319         int err;
 320
 321         dest[0] = '\0';
 322         memset(&iocb, 0, sizeof(iocb));
 323         iocb.fcode = CFE_CMD_ENV_GET;
 324         iocb.psize = sizeof(struct cfe_iocb_envbuf);
 325         iocb.envbuf.name = PTR_TO_CFE(name);
 326         iocb.envbuf.name_len = strlen(name);
 327         iocb.envbuf.val = PTR_TO_CFE(dest);
 328         iocb.envbuf.val_len = destlen;
 329
 330         err = cfe_iocb_dispatch(&iocb);
 331
 332         return (CFE_ISERR(err)) ? err : iocb.status;
 333 }
 334
 335 int cfe_getfwinfo(struct cfe_fwinfo *info)
 336 {
 337         struct cfe_iocb iocb;
 338         int err;
 339
 340         memset(&iocb, 0, sizeof(iocb));
 341         iocb.fcode = CFE_CMD_FW_GETINFO;
 342         iocb.psize = sizeof(struct cfe_iocb_fwinfo);
 343
 344         err = cfe_iocb_dispatch(&iocb);
 345         if (CFE_ISERR(err))
 346                 return err;
 347         if (CFE_ISERR(iocb.status))
 348                 return err;
 349
 350         info->version = iocb.fwinfo.version;
 351         info->totalmem = iocb.fwinfo.totalmem;
 352         info->flags = iocb.fwinfo.flags;
 353         info->boardid = iocb.fwinfo.boardid;
 354         info->bootarea_va = iocb.fwinfo.bootarea_va;
 355         info->bootarea_pa = iocb.fwinfo.bootarea_pa;
 356         info->bootarea_size = iocb.fwinfo.bootarea_size;
 357
 358         return iocb.status;
 359 }
 360
 361 int cfe_getstdhandle(int handletype)
 362 {
 363         struct cfe_iocb iocb;
 364         int err;
 365
 366         memset(&iocb, 0, sizeof(iocb));
 367         iocb.fcode = CFE_CMD_DEV_GETHANDLE;
 368         iocb.flags = handletype;
 369
 370         err = cfe_iocb_dispatch(&iocb);
 371         if (CFE_ISERR(err))
 372                 return err;
 373         if (CFE_ISERR(iocb.status))
 374                 return iocb.status;
 375
 376         return iocb.handle;
 377 }
 378
 379 int cfe_getticks(s64 *ticks)
 380 {
 381         struct cfe_iocb iocb;
 382         int err;
 383
 384         memset(&iocb, 0, sizeof(iocb));
 385         iocb.fcode = CFE_CMD_FW_GETTIME;
 386         iocb.psize = sizeof(struct cfe_iocb_time);
 387
 388         err = cfe_iocb_dispatch(&iocb);
 389         if (CFE_ISERR(err))
 390                 return err;
 391         if (!CFE_ISERR(iocb.status))
 392                 *ticks = iocb.time.ticks;
 393
 394         return iocb.status;
 395 }
 396
 397 int cfe_inpstat(int handle)
 398 {
 399         struct cfe_iocb iocb;
 400         int err;
 401
 402         memset(&iocb, 0, sizeof(iocb));
 403         iocb.fcode = CFE_CMD_DEV_INPSTAT;
 404         iocb.handle = handle;
 405         iocb.psize = sizeof(struct cfe_iocb_inpstat);
 406
 407         err = cfe_iocb_dispatch(&iocb);
 408         if (CFE_ISERR(err))
 409                 return err;
 410         if (CFE_ISERR(iocb.status))
 411                 return iocb.status;
 412
 413         return iocb.inpstat.status;
 414 }
 415
 416 int cfe_ioctl(int handle, unsigned int ioctlnum,
 417               unsigned char *buffer, int length,
 418               int *retlen, u64 offset)
 419 {
 420         struct cfe_iocb iocb;
 421         int err;
 422
 423         memset(&iocb, 0, sizeof(iocb));
 424         iocb.fcode = CFE_CMD_DEV_IOCTL;
 425         iocb.handle = handle;
 426         iocb.psize = sizeof(struct cfe_iocb_buf);
 427         iocb.buffer.offset = offset;
 428         iocb.buffer.ioctlcmd = ioctlnum;
 429         iocb.buffer.ptr = PTR_TO_CFE(buffer);
 430         iocb.buffer.length = length;
 431
 432         err = cfe_iocb_dispatch(&iocb);
 433         if (CFE_ISERR(err))
 434                 return err;
 435         if (CFE_ISERR(iocb.status))
 436                 return iocb.status;
 437         if (retlen)
 438                 *retlen = iocb.buffer.retlen;
 439
 440         return iocb.status;
 441 }
 442
 443 int cfe_open(char *name)
 444 {
 445         struct cfe_iocb iocb;
 446         int err;
 447
 448         memset(&iocb, 0, sizeof(iocb));
 449         iocb.fcode = CFE_CMD_DEV_OPEN;
 450         iocb.psize = sizeof(struct cfe_iocb_buf);
 451         iocb.buffer.ptr = PTR_TO_CFE(name);
 452         iocb.buffer.length = strlen(name);
 453
 454         err = cfe_iocb_dispatch(&iocb);
 455         if (CFE_ISERR(err))
 456                 return err;
 457         if (CFE_ISERR(iocb.status))
 458                 return iocb.status;
 459
 460         return iocb.handle;
 461 }
 462
 463 int cfe_read(int handle, unsigned char *buffer, int length)
 464 {
 465         return cfe_readblk(handle, 0, buffer, length);
 466 }
 467
 468 int cfe_readblk(int handle, s64 offset, unsigned char *buffer, int length)
 469 {
 470         struct cfe_iocb iocb;
 471         int err;
 472
 473         memset(&iocb, 0, sizeof(iocb));
 474         iocb.fcode = CFE_CMD_DEV_READ;
 475         iocb.handle = handle;
 476         iocb.psize = sizeof(struct cfe_iocb_buf);
 477         iocb.buffer.offset = offset;
 478         iocb.buffer.ptr = PTR_TO_CFE(buffer);
 479         iocb.buffer.length = length;
 480
 481         err = cfe_iocb_dispatch(&iocb);
 482         if (CFE_ISERR(err))
 483                 return err;
 484         if (CFE_ISERR(iocb.status))
 485                 return iocb.status;
 486
 487         return iocb.buffer.retlen;
 488 }
 489
 490 int cfe_setenv(char *name, char *val)
 491 {
 492         struct cfe_iocb iocb;
 493         int err;
 494
 495         memset(&iocb, 0, sizeof(iocb));
 496         iocb.fcode = CFE_CMD_ENV_SET;
 497         iocb.psize = sizeof(struct cfe_iocb_envbuf);
 498         iocb.envbuf.name = PTR_TO_CFE(name);
 499         iocb.envbuf.name_len = strlen(name);
 500         iocb.envbuf.val = PTR_TO_CFE(val);
 501         iocb.envbuf.val_len = strlen(val);
 502
 503         err = cfe_iocb_dispatch(&iocb);
 504
 505         return (CFE_ISERR(err)) ? err : iocb.status;
 506 }
 507
 508 int cfe_write(int handle, unsigned char *buffer, int length)
 509 {
 510         return cfe_writeblk(handle, 0, buffer, length);
 511 }
 512
 513 int cfe_writeblk(int handle, s64 offset, unsigned char *buffer, int length)
 514 {
 515         struct cfe_iocb iocb;
 516         int err;
 517
 518         memset(&iocb, 0, sizeof(iocb));
 519         iocb.fcode = CFE_CMD_DEV_WRITE;
 520         iocb.handle = handle;
 521         iocb.psize = sizeof(struct cfe_iocb_buf);
 522         iocb.buffer.offset = offset;
 523         iocb.buffer.ptr = PTR_TO_CFE(buffer);
 524         iocb.buffer.length = length;
 525
 526         err = cfe_iocb_dispatch(&iocb);
 527         if (CFE_ISERR(err))
 528                 return err;
 529         if (CFE_ISERR(iocb.status))
 530                 return iocb.status;
 531
 532         return iocb.buffer.retlen;
 533 }