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

   1 /*
   2  * Copyright (c) 2014 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/netdevice.h>
  18 #include <linux/module.h>
  19
  20 #include <brcm_hw_ids.h>
  21 #include <brcmu_wifi.h>
  22 #include "core.h"
  23 #include "bus.h"
  24 #include "debug.h"
  25 #include "fwil.h"
  26 #include "fwil_types.h"
  27 #include "feature.h"
  28 #include "common.h"
  29
  30 #define BRCMF_FW_UNSUPPORTED    23
  31
  32 /*
  33  * expand feature list to array of feature strings.
  34  */
  35 #define BRCMF_FEAT_DEF(_f) \
  36         #_f,
  37 static const char *brcmf_feat_names[] = {
  38         BRCMF_FEAT_LIST
  39 };
  40 #undef BRCMF_FEAT_DEF
  41
  42 struct brcmf_feat_fwcap {
  43         enum brcmf_feat_id feature;
  44         const char * const fwcap_id;
  45 };
  46
  47 static const struct brcmf_feat_fwcap brcmf_fwcap_map[] = {
  48         { BRCMF_FEAT_MBSS, "mbss" },
  49         { BRCMF_FEAT_MCHAN, "mchan" },
  50         { BRCMF_FEAT_P2P, "p2p" },
  51 };
  52
  53 #ifdef DEBUG
  54 /*
  55  * expand quirk list to array of quirk strings.
  56  */
  57 #define BRCMF_QUIRK_DEF(_q) \
  58         #_q,
  59 static const char * const brcmf_quirk_names[] = {
  60         BRCMF_QUIRK_LIST
  61 };
  62 #undef BRCMF_QUIRK_DEF
  63
  64 /**
  65  * brcmf_feat_debugfs_read() - expose feature info to debugfs.
  66  *
  67  * @seq: sequence for debugfs entry.
  68  * @data: raw data pointer.
  69  */
  70 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  71 {
  72         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
  73         u32 feats = bus_if->drvr->feat_flags;
  74         u32 quirks = bus_if->drvr->chip_quirks;
  75         int id;
  76
  77         seq_printf(seq, "Features: %08x\n", feats);
  78         for (id = 0; id < BRCMF_FEAT_LAST; id++)
  79                 if (feats & BIT(id))
  80                         seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
  81         seq_printf(seq, "\nQuirks:   %08x\n", quirks);
  82         for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
  83                 if (quirks & BIT(id))
  84                         seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
  85         return 0;
  86 }
  87 #else
  88 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  89 {
  90         return 0;
  91 }
  92 #endif /* DEBUG */
  93
  94 /**
  95  * brcmf_feat_iovar_int_get() - determine feature through iovar query.
  96  *
  97  * @ifp: interface to query.
  98  * @id: feature id.
  99  * @name: iovar name.
 100  */
 101 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
 102                                      enum brcmf_feat_id id, char *name)
 103 {
 104         u32 data;
 105         int err;
 106
 107         /* we need to know firmware error */
 108         ifp->fwil_fwerr = true;
 109
 110         err = brcmf_fil_iovar_int_get(ifp, name, &data);
 111         if (err == 0) {
 112                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 113                 ifp->drvr->feat_flags |= BIT(id);
 114         } else {
 115                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 116                           brcmf_feat_names[id], err);
 117         }
 118
 119         ifp->fwil_fwerr = false;
 120 }
 121
 122 static void brcmf_feat_iovar_data_set(struct brcmf_if *ifp,
 123                                       enum brcmf_feat_id id, char *name,
 124                                       const void *data, size_t len)
 125 {
 126         int err;
 127
 128         /* we need to know firmware error */
 129         ifp->fwil_fwerr = true;
 130
 131         err = brcmf_fil_iovar_data_set(ifp, name, data, len);
 132         if (err != -BRCMF_FW_UNSUPPORTED) {
 133                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 134                 ifp->drvr->feat_flags |= BIT(id);
 135         } else {
 136                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 137                           brcmf_feat_names[id], err);
 138         }
 139
 140         ifp->fwil_fwerr = false;
 141 }
 142
 143 #define MAX_CAPS_BUFFER_SIZE    512
 144 static void brcmf_feat_firmware_capabilities(struct brcmf_if *ifp)
 145 {
 146         char caps[MAX_CAPS_BUFFER_SIZE];
 147         enum brcmf_feat_id id;
 148         int i, err;
 149
 150         err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
 151         if (err) {
 152                 brcmf_err("could not get firmware cap (%d)\n", err);
 153                 return;
 154         }
 155
 156         brcmf_dbg(INFO, "[ %s]\n", caps);
 157
 158         for (i = 0; i < ARRAY_SIZE(brcmf_fwcap_map); i++) {
 159                 if (strnstr(caps, brcmf_fwcap_map[i].fwcap_id, sizeof(caps))) {
 160                         id = brcmf_fwcap_map[i].feature;
 161                         brcmf_dbg(INFO, "enabling feature: %s\n",
 162                                   brcmf_feat_names[id]);
 163                         ifp->drvr->feat_flags |= BIT(id);
 164                 }
 165         }
 166 }
 167
 168 void brcmf_feat_attach(struct brcmf_pub *drvr)
 169 {
 170         struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
 171         struct brcmf_pno_macaddr_le pfn_mac;
 172         struct brcmf_gscan_config gscan_cfg;
 173         u32 wowl_cap;
 174         s32 err;
 175
 176         brcmf_feat_firmware_capabilities(ifp);
 177         memset(&gscan_cfg, 0, sizeof(gscan_cfg));
 178         if (drvr->bus_if->chip != BRCM_CC_43430_CHIP_ID &&
 179             drvr->bus_if->chip != BRCM_CC_4345_CHIP_ID)
 180                 brcmf_feat_iovar_data_set(ifp, BRCMF_FEAT_GSCAN,
 181                                           "pfn_gscan_cfg",
 182                                           &gscan_cfg, sizeof(gscan_cfg));
 183         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
 184         if (drvr->bus_if->wowl_supported)
 185                 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
 186         if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL)) {
 187                 err = brcmf_fil_iovar_int_get(ifp, "wowl_cap", &wowl_cap);
 188                 if (!err) {
 189                         ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_WOWL_ARP_ND);
 190                         if (wowl_cap & BRCMF_WOWL_PFN_FOUND)
 191                                 ifp->drvr->feat_flags |=
 192                                         BIT(BRCMF_FEAT_WOWL_ND);
 193                         if (wowl_cap & BRCMF_WOWL_GTK_FAILURE)
 194                                 ifp->drvr->feat_flags |=
 195                                         BIT(BRCMF_FEAT_WOWL_GTK);
 196                 }
 197         }
 198         /* MBSS does not work for 43362 */
 199         if (drvr->bus_if->chip == BRCM_CC_43362_CHIP_ID)
 200                 ifp->drvr->feat_flags &= ~BIT(BRCMF_FEAT_MBSS);
 201         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
 202         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
 203         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MFP, "mfp");
 204
 205         pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
 206         err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
 207                                        sizeof(pfn_mac));
 208         if (!err)
 209                 ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);
 210
 211         if (drvr->settings->feature_disable) {
 212                 brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
 213                           ifp->drvr->feat_flags,
 214                           drvr->settings->feature_disable);
 215                 ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
 216         }
 217         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");
 218
 219         /* set chip related quirks */
 220         switch (drvr->bus_if->chip) {
 221         case BRCM_CC_43236_CHIP_ID:
 222                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
 223                 break;
 224         case BRCM_CC_4329_CHIP_ID:
 225                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
 226                 break;
 227         default:
 228                 /* no quirks */
 229                 break;
 230         }
 231
 232         brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
 233 }
 234
 235 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
 236 {
 237         return (ifp->drvr->feat_flags & BIT(id));
 238 }
 239
 240 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
 241                                  enum brcmf_feat_quirk quirk)
 242 {
 243         return (ifp->drvr->chip_quirks & BIT(quirk));
 244 }