drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.c

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 /* FWIL is the Firmware Interface Layer. In this module the support functions
  18  * are located to set and get variables to and from the firmware.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/netdevice.h>
  23 #include <brcmu_utils.h>
  24 #include <brcmu_wifi.h>
  25 #include "core.h"
  26 #include "bus.h"
  27 #include "debug.h"
  28 #include "tracepoint.h"
  29 #include "fwil.h"
  30 #include "proto.h"
  31
  32
  33 #define MAX_HEX_DUMP_LEN        64
  34
  35 #ifdef DEBUG
  36 static const char * const brcmf_fil_errstr[] = {
  37         "BCME_OK",
  38         "BCME_ERROR",
  39         "BCME_BADARG",
  40         "BCME_BADOPTION",
  41         "BCME_NOTUP",
  42         "BCME_NOTDOWN",
  43         "BCME_NOTAP",
  44         "BCME_NOTSTA",
  45         "BCME_BADKEYIDX",
  46         "BCME_RADIOOFF",
  47         "BCME_NOTBANDLOCKED",
  48         "BCME_NOCLK",
  49         "BCME_BADRATESET",
  50         "BCME_BADBAND",
  51         "BCME_BUFTOOSHORT",
  52         "BCME_BUFTOOLONG",
  53         "BCME_BUSY",
  54         "BCME_NOTASSOCIATED",
  55         "BCME_BADSSIDLEN",
  56         "BCME_OUTOFRANGECHAN",
  57         "BCME_BADCHAN",
  58         "BCME_BADADDR",
  59         "BCME_NORESOURCE",
  60         "BCME_UNSUPPORTED",
  61         "BCME_BADLEN",
  62         "BCME_NOTREADY",
  63         "BCME_EPERM",
  64         "BCME_NOMEM",
  65         "BCME_ASSOCIATED",
  66         "BCME_RANGE",
  67         "BCME_NOTFOUND",
  68         "BCME_WME_NOT_ENABLED",
  69         "BCME_TSPEC_NOTFOUND",
  70         "BCME_ACM_NOTSUPPORTED",
  71         "BCME_NOT_WME_ASSOCIATION",
  72         "BCME_SDIO_ERROR",
  73         "BCME_DONGLE_DOWN",
  74         "BCME_VERSION",
  75         "BCME_TXFAIL",
  76         "BCME_RXFAIL",
  77         "BCME_NODEVICE",
  78         "BCME_NMODE_DISABLED",
  79         "BCME_NONRESIDENT",
  80         "BCME_SCANREJECT",
  81         "BCME_USAGE_ERROR",
  82         "BCME_IOCTL_ERROR",
  83         "BCME_SERIAL_PORT_ERR",
  84         "BCME_DISABLED",
  85         "BCME_DECERR",
  86         "BCME_ENCERR",
  87         "BCME_MICERR",
  88         "BCME_REPLAY",
  89         "BCME_IE_NOTFOUND",
  90 };
  91
  92 static const char *brcmf_fil_get_errstr(u32 err)
  93 {
  94         if (err >= ARRAY_SIZE(brcmf_fil_errstr))
  95                 return "(unknown)";
  96
  97         return brcmf_fil_errstr[err];
  98 }
  99 #else
 100 static const char *brcmf_fil_get_errstr(u32 err)
 101 {
 102         return "";
 103 }
 104 #endif /* DEBUG */
 105
 106 static s32
 107 brcmf_fil_cmd_data(struct brcmf_if *ifp, u32 cmd, void *data, u32 len, bool set)
 108 {
 109         struct brcmf_pub *drvr = ifp->drvr;
 110         s32 err, fwerr;
 111
 112         if (drvr->bus_if->state != BRCMF_BUS_UP) {
 113                 brcmf_err("bus is down. we have nothing to do.\n");
 114                 return -EIO;
 115         }
 116
 117         if (data != NULL)
 118                 len = min_t(uint, len, BRCMF_DCMD_MAXLEN);
 119         if (set)
 120                 err = brcmf_proto_set_dcmd(drvr, ifp->ifidx, cmd,
 121                                            data, len, &fwerr);
 122         else
 123                 err = brcmf_proto_query_dcmd(drvr, ifp->ifidx, cmd,
 124                                              data, len, &fwerr);
 125
 126         if (err) {
 127                 brcmf_dbg(FIL, "Failed: error=%d\n", err);
 128         } else if (fwerr < 0) {
 129                 brcmf_dbg(FIL, "Firmware error: %s (%d)\n",
 130                           brcmf_fil_get_errstr((u32)(-fwerr)), fwerr);
 131                 err = -EBADE;
 132         }
 133         if (ifp->fwil_fwerr)
 134                 return fwerr;
 135
 136         return err;
 137 }
 138
 139 s32
 140 brcmf_fil_cmd_data_set(struct brcmf_if *ifp, u32 cmd, void *data, u32 len)
 141 {
 142         s32 err;
 143
 144         mutex_lock(&ifp->drvr->proto_block);
 145
 146         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, len=%d\n", ifp->ifidx, cmd, len);
 147         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 148                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 149
 150         err = brcmf_fil_cmd_data(ifp, cmd, data, len, true);
 151         mutex_unlock(&ifp->drvr->proto_block);
 152
 153         return err;
 154 }
 155
 156 s32
 157 brcmf_fil_cmd_data_get(struct brcmf_if *ifp, u32 cmd, void *data, u32 len)
 158 {
 159         s32 err;
 160
 161         mutex_lock(&ifp->drvr->proto_block);
 162         err = brcmf_fil_cmd_data(ifp, cmd, data, len, false);
 163
 164         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, len=%d\n", ifp->ifidx, cmd, len);
 165         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 166                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 167
 168         mutex_unlock(&ifp->drvr->proto_block);
 169
 170         return err;
 171 }
 172
 173
 174 s32
 175 brcmf_fil_cmd_int_set(struct brcmf_if *ifp, u32 cmd, u32 data)
 176 {
 177         s32 err;
 178         __le32 data_le = cpu_to_le32(data);
 179
 180         mutex_lock(&ifp->drvr->proto_block);
 181         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, value=%d\n", ifp->ifidx, cmd, data);
 182         err = brcmf_fil_cmd_data(ifp, cmd, &data_le, sizeof(data_le), true);
 183         mutex_unlock(&ifp->drvr->proto_block);
 184
 185         return err;
 186 }
 187
 188 s32
 189 brcmf_fil_cmd_int_get(struct brcmf_if *ifp, u32 cmd, u32 *data)
 190 {
 191         s32 err;
 192         __le32 data_le = cpu_to_le32(*data);
 193
 194         mutex_lock(&ifp->drvr->proto_block);
 195         err = brcmf_fil_cmd_data(ifp, cmd, &data_le, sizeof(data_le), false);
 196         mutex_unlock(&ifp->drvr->proto_block);
 197         *data = le32_to_cpu(data_le);
 198         brcmf_dbg(FIL, "ifidx=%d, cmd=%d, value=%d\n", ifp->ifidx, cmd, *data);
 199
 200         return err;
 201 }
 202
 203 static u32
 204 brcmf_create_iovar(char *name, const char *data, u32 datalen,
 205                    char *buf, u32 buflen)
 206 {
 207         u32 len;
 208
 209         len = strlen(name) + 1;
 210
 211         if ((len + datalen) > buflen)
 212                 return 0;
 213
 214         memcpy(buf, name, len);
 215
 216         /* append data onto the end of the name string */
 217         if (data && datalen)
 218                 memcpy(&buf[len], data, datalen);
 219
 220         return len + datalen;
 221 }
 222
 223
 224 s32
 225 brcmf_fil_iovar_data_set(struct brcmf_if *ifp, char *name, const void *data,
 226                          u32 len)
 227 {
 228         struct brcmf_pub *drvr = ifp->drvr;
 229         s32 err;
 230         u32 buflen;
 231
 232         mutex_lock(&drvr->proto_block);
 233
 234         brcmf_dbg(FIL, "ifidx=%d, name=%s, len=%d\n", ifp->ifidx, name, len);
 235         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 236                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 237
 238         buflen = brcmf_create_iovar(name, data, len, drvr->proto_buf,
 239                                     sizeof(drvr->proto_buf));
 240         if (buflen) {
 241                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_SET_VAR, drvr->proto_buf,
 242                                          buflen, true);
 243         } else {
 244                 err = -EPERM;
 245                 brcmf_err("Creating iovar failed\n");
 246         }
 247
 248         mutex_unlock(&drvr->proto_block);
 249         return err;
 250 }
 251
 252 s32
 253 brcmf_fil_iovar_data_get(struct brcmf_if *ifp, char *name, void *data,
 254                          u32 len)
 255 {
 256         struct brcmf_pub *drvr = ifp->drvr;
 257         s32 err;
 258         u32 buflen;
 259
 260         mutex_lock(&drvr->proto_block);
 261
 262         buflen = brcmf_create_iovar(name, data, len, drvr->proto_buf,
 263                                     sizeof(drvr->proto_buf));
 264         if (buflen) {
 265                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_GET_VAR, drvr->proto_buf,
 266                                          buflen, false);
 267                 if (err == 0)
 268                         memcpy(data, drvr->proto_buf, len);
 269         } else {
 270                 err = -EPERM;
 271                 brcmf_err("Creating iovar failed\n");
 272         }
 273
 274         brcmf_dbg(FIL, "ifidx=%d, name=%s, len=%d\n", ifp->ifidx, name, len);
 275         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 276                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 277
 278         mutex_unlock(&drvr->proto_block);
 279         return err;
 280 }
 281
 282 s32
 283 brcmf_fil_iovar_int_set(struct brcmf_if *ifp, char *name, u32 data)
 284 {
 285         __le32 data_le = cpu_to_le32(data);
 286
 287         return brcmf_fil_iovar_data_set(ifp, name, &data_le, sizeof(data_le));
 288 }
 289
 290 s32
 291 brcmf_fil_iovar_int_get(struct brcmf_if *ifp, char *name, u32 *data)
 292 {
 293         __le32 data_le = cpu_to_le32(*data);
 294         s32 err;
 295
 296         err = brcmf_fil_iovar_data_get(ifp, name, &data_le, sizeof(data_le));
 297         if (err == 0)
 298                 *data = le32_to_cpu(data_le);
 299         return err;
 300 }
 301
 302 static u32
 303 brcmf_create_bsscfg(s32 bsscfgidx, char *name, char *data, u32 datalen,
 304                     char *buf, u32 buflen)
 305 {
 306         const s8 *prefix = "bsscfg:";
 307         s8 *p;
 308         u32 prefixlen;
 309         u32 namelen;
 310         u32 iolen;
 311         __le32 bsscfgidx_le;
 312
 313         if (bsscfgidx == 0)
 314                 return brcmf_create_iovar(name, data, datalen, buf, buflen);
 315
 316         prefixlen = strlen(prefix);
 317         namelen = strlen(name) + 1; /* lengh of iovar  name + null */
 318         iolen = prefixlen + namelen + sizeof(bsscfgidx_le) + datalen;
 319
 320         if (buflen < iolen) {
 321                 brcmf_err("buffer is too short\n");
 322                 return 0;
 323         }
 324
 325         p = buf;
 326
 327         /* copy prefix, no null */
 328         memcpy(p, prefix, prefixlen);
 329         p += prefixlen;
 330
 331         /* copy iovar name including null */
 332         memcpy(p, name, namelen);
 333         p += namelen;
 334
 335         /* bss config index as first data */
 336         bsscfgidx_le = cpu_to_le32(bsscfgidx);
 337         memcpy(p, &bsscfgidx_le, sizeof(bsscfgidx_le));
 338         p += sizeof(bsscfgidx_le);
 339
 340         /* parameter buffer follows */
 341         if (datalen)
 342                 memcpy(p, data, datalen);
 343
 344         return iolen;
 345 }
 346
 347 s32
 348 brcmf_fil_bsscfg_data_set(struct brcmf_if *ifp, char *name,
 349                           void *data, u32 len)
 350 {
 351         struct brcmf_pub *drvr = ifp->drvr;
 352         s32 err;
 353         u32 buflen;
 354
 355         mutex_lock(&drvr->proto_block);
 356
 357         brcmf_dbg(FIL, "ifidx=%d, bsscfgidx=%d, name=%s, len=%d\n", ifp->ifidx,
 358                   ifp->bsscfgidx, name, len);
 359         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 360                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 361
 362         buflen = brcmf_create_bsscfg(ifp->bsscfgidx, name, data, len,
 363                                      drvr->proto_buf, sizeof(drvr->proto_buf));
 364         if (buflen) {
 365                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_SET_VAR, drvr->proto_buf,
 366                                          buflen, true);
 367         } else {
 368                 err = -EPERM;
 369                 brcmf_err("Creating bsscfg failed\n");
 370         }
 371
 372         mutex_unlock(&drvr->proto_block);
 373         return err;
 374 }
 375
 376 s32
 377 brcmf_fil_bsscfg_data_get(struct brcmf_if *ifp, char *name,
 378                           void *data, u32 len)
 379 {
 380         struct brcmf_pub *drvr = ifp->drvr;
 381         s32 err;
 382         u32 buflen;
 383
 384         mutex_lock(&drvr->proto_block);
 385
 386         buflen = brcmf_create_bsscfg(ifp->bsscfgidx, name, data, len,
 387                                      drvr->proto_buf, sizeof(drvr->proto_buf));
 388         if (buflen) {
 389                 err = brcmf_fil_cmd_data(ifp, BRCMF_C_GET_VAR, drvr->proto_buf,
 390                                          buflen, false);
 391                 if (err == 0)
 392                         memcpy(data, drvr->proto_buf, len);
 393         } else {
 394                 err = -EPERM;
 395                 brcmf_err("Creating bsscfg failed\n");
 396         }
 397         brcmf_dbg(FIL, "ifidx=%d, bsscfgidx=%d, name=%s, len=%d\n", ifp->ifidx,
 398                   ifp->bsscfgidx, name, len);
 399         brcmf_dbg_hex_dump(BRCMF_FIL_ON(), data,
 400                            min_t(uint, len, MAX_HEX_DUMP_LEN), "data\n");
 401
 402         mutex_unlock(&drvr->proto_block);
 403         return err;
 404
 405 }
 406
 407 s32
 408 brcmf_fil_bsscfg_int_set(struct brcmf_if *ifp, char *name, u32 data)
 409 {
 410         __le32 data_le = cpu_to_le32(data);
 411
 412         return brcmf_fil_bsscfg_data_set(ifp, name, &data_le,
 413                                          sizeof(data_le));
 414 }
 415
 416 s32
 417 brcmf_fil_bsscfg_int_get(struct brcmf_if *ifp, char *name, u32 *data)
 418 {
 419         __le32 data_le = cpu_to_le32(*data);
 420         s32 err;
 421
 422         err = brcmf_fil_bsscfg_data_get(ifp, name, &data_le,
 423                                         sizeof(data_le));
 424         if (err == 0)
 425                 *data = le32_to_cpu(data_le);
 426         return err;
 427 }