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

   1 /*
   2  * Copyright (c) 2010 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 #include <linux/kernel.h>
  18 #include <linux/string.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/module.h>
  21 #include <brcmu_wifi.h>
  22 #include <brcmu_utils.h>
  23 #include "core.h"
  24 #include "bus.h"
  25 #include "debug.h"
  26 #include "fwil.h"
  27 #include "fwil_types.h"
  28 #include "tracepoint.h"
  29 #include "common.h"
  30 #include "of.h"
  31
  32 MODULE_AUTHOR("Broadcom Corporation");
  33 MODULE_DESCRIPTION("Broadcom 802.11 wireless LAN fullmac driver.");
  34 MODULE_LICENSE("Dual BSD/GPL");
  35
  36 const u8 ALLFFMAC[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  37
  38 #define BRCMF_DEFAULT_SCAN_CHANNEL_TIME 40
  39 #define BRCMF_DEFAULT_SCAN_UNASSOC_TIME 40
  40
  41 /* default boost value for RSSI_DELTA in preferred join selection */
  42 #define BRCMF_JOIN_PREF_RSSI_BOOST      8
  43
  44 #define BRCMF_DEFAULT_TXGLOM_SIZE       32  /* max tx frames in glom chain */
  45
  46 static int brcmf_sdiod_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;
  47 module_param_named(txglomsz, brcmf_sdiod_txglomsz, int, 0);
  48 MODULE_PARM_DESC(txglomsz, "Maximum tx packet chain size [SDIO]");
  49
  50 /* Debug level configuration. See debug.h for bits, sysfs modifiable */
  51 int brcmf_msg_level;
  52 module_param_named(debug, brcmf_msg_level, int, S_IRUSR | S_IWUSR);
  53 MODULE_PARM_DESC(debug, "Level of debug output");
  54
  55 static int brcmf_p2p_enable;
  56 module_param_named(p2pon, brcmf_p2p_enable, int, 0);
  57 MODULE_PARM_DESC(p2pon, "Enable legacy p2p management functionality");
  58
  59 static int brcmf_feature_disable;
  60 module_param_named(feature_disable, brcmf_feature_disable, int, 0);
  61 MODULE_PARM_DESC(feature_disable, "Disable features");
  62
  63 static char brcmf_firmware_path[BRCMF_FW_ALTPATH_LEN];
  64 module_param_string(alternative_fw_path, brcmf_firmware_path,
  65                     BRCMF_FW_ALTPATH_LEN, S_IRUSR);
  66 MODULE_PARM_DESC(alternative_fw_path, "Alternative firmware path");
  67
  68 static int brcmf_fcmode;
  69 module_param_named(fcmode, brcmf_fcmode, int, 0);
  70 MODULE_PARM_DESC(fcmode, "Mode of firmware signalled flow control");
  71
  72 static int brcmf_roamoff;
  73 module_param_named(roamoff, brcmf_roamoff, int, S_IRUSR);
  74 MODULE_PARM_DESC(roamoff, "Do not use internal roaming engine");
  75
  76 #ifdef DEBUG
  77 /* always succeed brcmf_bus_start() */
  78 static int brcmf_ignore_probe_fail;
  79 module_param_named(ignore_probe_fail, brcmf_ignore_probe_fail, int, 0);
  80 MODULE_PARM_DESC(ignore_probe_fail, "always succeed probe for debugging");
  81 #endif
  82
  83 static struct brcmfmac_platform_data *brcmfmac_pdata;
  84 struct brcmf_mp_global_t brcmf_mp_global;
  85
  86 void brcmf_c_set_joinpref_default(struct brcmf_if *ifp)
  87 {
  88         struct brcmf_join_pref_params join_pref_params[2];
  89         int err;
  90
  91         /* Setup join_pref to select target by RSSI (boost on 5GHz) */
  92         join_pref_params[0].type = BRCMF_JOIN_PREF_RSSI_DELTA;
  93         join_pref_params[0].len = 2;
  94         join_pref_params[0].rssi_gain = BRCMF_JOIN_PREF_RSSI_BOOST;
  95         join_pref_params[0].band = WLC_BAND_5G;
  96
  97         join_pref_params[1].type = BRCMF_JOIN_PREF_RSSI;
  98         join_pref_params[1].len = 2;
  99         join_pref_params[1].rssi_gain = 0;
 100         join_pref_params[1].band = 0;
 101         err = brcmf_fil_iovar_data_set(ifp, "join_pref", join_pref_params,
 102                                        sizeof(join_pref_params));
 103         if (err)
 104                 brcmf_err("Set join_pref error (%d)\n", err);
 105 }
 106
 107 int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
 108 {
 109         s8 eventmask[BRCMF_EVENTING_MASK_LEN];
 110         u8 buf[BRCMF_DCMD_SMLEN];
 111         struct brcmf_rev_info_le revinfo;
 112         struct brcmf_rev_info *ri;
 113         char *ptr;
 114         s32 err;
 115
 116         /* retreive mac address */
 117         err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr,
 118                                        sizeof(ifp->mac_addr));
 119         if (err < 0) {
 120                 brcmf_err("Retreiving cur_etheraddr failed, %d\n", err);
 121                 goto done;
 122         }
 123         memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));
 124
 125         err = brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_REVINFO,
 126                                      &revinfo, sizeof(revinfo));
 127         ri = &ifp->drvr->revinfo;
 128         if (err < 0) {
 129                 brcmf_err("retrieving revision info failed, %d\n", err);
 130         } else {
 131                 ri->vendorid = le32_to_cpu(revinfo.vendorid);
 132                 ri->deviceid = le32_to_cpu(revinfo.deviceid);
 133                 ri->radiorev = le32_to_cpu(revinfo.radiorev);
 134                 ri->chiprev = le32_to_cpu(revinfo.chiprev);
 135                 ri->corerev = le32_to_cpu(revinfo.corerev);
 136                 ri->boardid = le32_to_cpu(revinfo.boardid);
 137                 ri->boardvendor = le32_to_cpu(revinfo.boardvendor);
 138                 ri->boardrev = le32_to_cpu(revinfo.boardrev);
 139                 ri->driverrev = le32_to_cpu(revinfo.driverrev);
 140                 ri->ucoderev = le32_to_cpu(revinfo.ucoderev);
 141                 ri->bus = le32_to_cpu(revinfo.bus);
 142                 ri->chipnum = le32_to_cpu(revinfo.chipnum);
 143                 ri->phytype = le32_to_cpu(revinfo.phytype);
 144                 ri->phyrev = le32_to_cpu(revinfo.phyrev);
 145                 ri->anarev = le32_to_cpu(revinfo.anarev);
 146                 ri->chippkg = le32_to_cpu(revinfo.chippkg);
 147                 ri->nvramrev = le32_to_cpu(revinfo.nvramrev);
 148         }
 149         ri->result = err;
 150
 151         /* query for 'ver' to get version info from firmware */
 152         memset(buf, 0, sizeof(buf));
 153         strcpy(buf, "ver");
 154         err = brcmf_fil_iovar_data_get(ifp, "ver", buf, sizeof(buf));
 155         if (err < 0) {
 156                 brcmf_err("Retreiving version information failed, %d\n",
 157                           err);
 158                 goto done;
 159         }
 160         ptr = (char *)buf;
 161         strsep(&ptr, "\n");
 162
 163         /* Print fw version info */
 164         brcmf_err("Firmware version = %s\n", buf);
 165
 166         /* locate firmware version number for ethtool */
 167         ptr = strrchr(buf, ' ') + 1;
 168         strlcpy(ifp->drvr->fwver, ptr, sizeof(ifp->drvr->fwver));
 169
 170         /* set mpc */
 171         err = brcmf_fil_iovar_int_set(ifp, "mpc", 1);
 172         if (err) {
 173                 brcmf_err("failed setting mpc\n");
 174                 goto done;
 175         }
 176
 177         brcmf_c_set_joinpref_default(ifp);
 178
 179         /* Setup event_msgs, enable E_IF */
 180         err = brcmf_fil_iovar_data_get(ifp, "event_msgs", eventmask,
 181                                        BRCMF_EVENTING_MASK_LEN);
 182         if (err) {
 183                 brcmf_err("Get event_msgs error (%d)\n", err);
 184                 goto done;
 185         }
 186         setbit(eventmask, BRCMF_E_IF);
 187         err = brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask,
 188                                        BRCMF_EVENTING_MASK_LEN);
 189         if (err) {
 190                 brcmf_err("Set event_msgs error (%d)\n", err);
 191                 goto done;
 192         }
 193
 194         /* Setup default scan channel time */
 195         err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_CHANNEL_TIME,
 196                                     BRCMF_DEFAULT_SCAN_CHANNEL_TIME);
 197         if (err) {
 198                 brcmf_err("BRCMF_C_SET_SCAN_CHANNEL_TIME error (%d)\n",
 199                           err);
 200                 goto done;
 201         }
 202
 203         /* Setup default scan unassoc time */
 204         err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCAN_UNASSOC_TIME,
 205                                     BRCMF_DEFAULT_SCAN_UNASSOC_TIME);
 206         if (err) {
 207                 brcmf_err("BRCMF_C_SET_SCAN_UNASSOC_TIME error (%d)\n",
 208                           err);
 209                 goto done;
 210         }
 211
 212         /* Enable tx beamforming, errors can be ignored (not supported) */
 213         (void)brcmf_fil_iovar_int_set(ifp, "txbf", 1);
 214
 215         /* do bus specific preinit here */
 216         err = brcmf_bus_preinit(ifp->drvr->bus_if);
 217 done:
 218         return err;
 219 }
 220
 221 #if defined(CONFIG_BRCM_TRACING) || defined(CONFIG_BRCMDBG)
 222 void __brcmf_dbg(u32 level, const char *func, const char *fmt, ...)
 223 {
 224         struct va_format vaf = {
 225                 .fmt = fmt,
 226         };
 227         va_list args;
 228
 229         va_start(args, fmt);
 230         vaf.va = &args;
 231         if (brcmf_msg_level & level)
 232                 pr_debug("%s %pV", func, &vaf);
 233         trace_brcmf_dbg(level, func, &vaf);
 234         va_end(args);
 235 }
 236 #endif
 237
 238 static void brcmf_mp_attach(void)
 239 {
 240         /* If module param firmware path is set then this will always be used,
 241          * if not set then if available use the platform data version. To make
 242          * sure it gets initialized at all, always copy the module param version
 243          */
 244         strlcpy(brcmf_mp_global.firmware_path, brcmf_firmware_path,
 245                 BRCMF_FW_ALTPATH_LEN);
 246         if ((brcmfmac_pdata) && (brcmfmac_pdata->fw_alternative_path) &&
 247             (brcmf_mp_global.firmware_path[0] == '\0')) {
 248                 strlcpy(brcmf_mp_global.firmware_path,
 249                         brcmfmac_pdata->fw_alternative_path,
 250                         BRCMF_FW_ALTPATH_LEN);
 251         }
 252 }
 253
 254 struct brcmf_mp_device *brcmf_get_module_param(struct device *dev,
 255                                                enum brcmf_bus_type bus_type,
 256                                                u32 chip, u32 chiprev)
 257 {
 258         struct brcmf_mp_device *settings;
 259         struct brcmfmac_pd_device *device_pd;
 260         bool found;
 261         int i;
 262
 263         brcmf_dbg(INFO, "Enter, bus=%d, chip=%d, rev=%d\n", bus_type, chip,
 264                   chiprev);
 265         settings = kzalloc(sizeof(*settings), GFP_ATOMIC);
 266         if (!settings)
 267                 return NULL;
 268
 269         /* start by using the module paramaters */
 270         settings->p2p_enable = !!brcmf_p2p_enable;
 271         settings->feature_disable = brcmf_feature_disable;
 272         settings->fcmode = brcmf_fcmode;
 273         settings->roamoff = !!brcmf_roamoff;
 274 #ifdef DEBUG
 275         settings->ignore_probe_fail = !!brcmf_ignore_probe_fail;
 276 #endif
 277
 278         if (bus_type == BRCMF_BUSTYPE_SDIO)
 279                 settings->bus.sdio.txglomsz = brcmf_sdiod_txglomsz;
 280
 281         /* See if there is any device specific platform data configured */
 282         found = false;
 283         if (brcmfmac_pdata) {
 284                 for (i = 0; i < brcmfmac_pdata->device_count; i++) {
 285                         device_pd = &brcmfmac_pdata->devices[i];
 286                         if ((device_pd->bus_type == bus_type) &&
 287                             (device_pd->id == chip) &&
 288                             ((device_pd->rev == chiprev) ||
 289                              (device_pd->rev == -1))) {
 290                                 brcmf_dbg(INFO, "Platform data for device found\n");
 291                                 settings->country_codes =
 292                                                 device_pd->country_codes;
 293                                 if (device_pd->bus_type == BRCMF_BUSTYPE_SDIO)
 294                                         memcpy(&settings->bus.sdio,
 295                                                &device_pd->bus.sdio,
 296                                                sizeof(settings->bus.sdio));
 297                                 found = true;
 298                                 break;
 299                         }
 300                 }
 301         }
 302         if ((bus_type == BRCMF_BUSTYPE_SDIO) && (!found)) {
 303                 /* No platform data for this device. In case of SDIO try OF
 304                  * (Open Firwmare) Device Tree.
 305                  */
 306                 brcmf_of_probe(dev, &settings->bus.sdio);
 307         }
 308         return settings;
 309 }
 310
 311 void brcmf_release_module_param(struct brcmf_mp_device *module_param)
 312 {
 313         kfree(module_param);
 314 }
 315
 316 static int __init brcmf_common_pd_probe(struct platform_device *pdev)
 317 {
 318         brcmf_dbg(INFO, "Enter\n");
 319
 320         brcmfmac_pdata = dev_get_platdata(&pdev->dev);
 321
 322         if (brcmfmac_pdata->power_on)
 323                 brcmfmac_pdata->power_on();
 324
 325         return 0;
 326 }
 327
 328 static int brcmf_common_pd_remove(struct platform_device *pdev)
 329 {
 330         brcmf_dbg(INFO, "Enter\n");
 331
 332         if (brcmfmac_pdata->power_off)
 333                 brcmfmac_pdata->power_off();
 334
 335         return 0;
 336 }
 337
 338 static struct platform_driver brcmf_pd = {
 339         .remove         = brcmf_common_pd_remove,
 340         .driver         = {
 341                 .name   = BRCMFMAC_PDATA_NAME,
 342         }
 343 };
 344
 345 static int __init brcmfmac_module_init(void)
 346 {
 347         int err;
 348
 349         /* Initialize debug system first */
 350         brcmf_debugfs_init();
 351
 352         /* Get the platform data (if available) for our devices */
 353         err = platform_driver_probe(&brcmf_pd, brcmf_common_pd_probe);
 354         if (err == -ENODEV)
 355                 brcmf_dbg(INFO, "No platform data available.\n");
 356
 357         /* Initialize global module paramaters */
 358         brcmf_mp_attach();
 359
 360         /* Continue the initialization by registering the different busses */
 361         err = brcmf_core_init();
 362         if (err) {
 363                 brcmf_debugfs_exit();
 364                 if (brcmfmac_pdata)
 365                         platform_driver_unregister(&brcmf_pd);
 366         }
 367
 368         return err;
 369 }
 370
 371 static void __exit brcmfmac_module_exit(void)
 372 {
 373         brcmf_core_exit();
 374         if (brcmfmac_pdata)
 375                 platform_driver_unregister(&brcmf_pd);
 376         brcmf_debugfs_exit();
 377 }
 378
 379 module_init(brcmfmac_module_init);
 380 module_exit(brcmfmac_module_exit);
 381