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
  31 /*
  32  * expand feature list to array of feature strings.
  33  */
  34 #define BRCMF_FEAT_DEF(_f) \
  35         #_f,
  36 static const char *brcmf_feat_names[] = {
  37         BRCMF_FEAT_LIST
  38 };
  39 #undef BRCMF_FEAT_DEF
  40
  41 struct brcmf_feat_fwcap {
  42         enum brcmf_feat_id feature;
  43         const char * const fwcap_id;
  44 };
  45
  46 static const struct brcmf_feat_fwcap brcmf_fwcap_map[] = {
  47         { BRCMF_FEAT_MBSS, "mbss" },
  48         { BRCMF_FEAT_MCHAN, "mchan" },
  49         { BRCMF_FEAT_P2P, "p2p" },
  50 };
  51
  52 #ifdef DEBUG
  53 /*
  54  * expand quirk list to array of quirk strings.
  55  */
  56 #define BRCMF_QUIRK_DEF(_q) \
  57         #_q,
  58 static const char * const brcmf_quirk_names[] = {
  59         BRCMF_QUIRK_LIST
  60 };
  61 #undef BRCMF_QUIRK_DEF
  62
  63 /**
  64  * brcmf_feat_debugfs_read() - expose feature info to debugfs.
  65  *
  66  * @seq: sequence for debugfs entry.
  67  * @data: raw data pointer.
  68  */
  69 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  70 {
  71         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
  72         u32 feats = bus_if->drvr->feat_flags;
  73         u32 quirks = bus_if->drvr->chip_quirks;
  74         int id;
  75
  76         seq_printf(seq, "Features: %08x\n", feats);
  77         for (id = 0; id < BRCMF_FEAT_LAST; id++)
  78                 if (feats & BIT(id))
  79                         seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
  80         seq_printf(seq, "\nQuirks:   %08x\n", quirks);
  81         for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
  82                 if (quirks & BIT(id))
  83                         seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
  84         return 0;
  85 }
  86 #else
  87 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  88 {
  89         return 0;
  90 }
  91 #endif /* DEBUG */
  92
  93 /**
  94  * brcmf_feat_iovar_int_get() - determine feature through iovar query.
  95  *
  96  * @ifp: interface to query.
  97  * @id: feature id.
  98  * @name: iovar name.
  99  */
 100 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
 101                                      enum brcmf_feat_id id, char *name)
 102 {
 103         u32 data;
 104         int err;
 105
 106         err = brcmf_fil_iovar_int_get(ifp, name, &data);
 107         if (err == 0) {
 108                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 109                 ifp->drvr->feat_flags |= BIT(id);
 110         } else {
 111                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 112                           brcmf_feat_names[id], err);
 113         }
 114 }
 115
 116 static void brcmf_feat_firmware_capabilities(struct brcmf_if *ifp)
 117 {
 118         char caps[256];
 119         enum brcmf_feat_id id;
 120         int i;
 121
 122         brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
 123         brcmf_dbg(INFO, "[ %s]\n", caps);
 124
 125         for (i = 0; i < ARRAY_SIZE(brcmf_fwcap_map); i++) {
 126                 if (strnstr(caps, brcmf_fwcap_map[i].fwcap_id, sizeof(caps))) {
 127                         id = brcmf_fwcap_map[i].feature;
 128                         brcmf_dbg(INFO, "enabling feature: %s\n",
 129                                   brcmf_feat_names[id]);
 130                         ifp->drvr->feat_flags |= BIT(id);
 131                 }
 132         }
 133 }
 134
 135 void brcmf_feat_attach(struct brcmf_pub *drvr)
 136 {
 137         struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
 138         struct brcmf_pno_macaddr_le pfn_mac;
 139         u32 wowl_cap;
 140         s32 err;
 141
 142         brcmf_feat_firmware_capabilities(ifp);
 143
 144         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
 145         if (drvr->bus_if->wowl_supported)
 146                 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
 147         if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL)) {
 148                 err = brcmf_fil_iovar_int_get(ifp, "wowl_cap", &wowl_cap);
 149                 if (!err) {
 150                         ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_WOWL_ARP_ND);
 151                         if (wowl_cap & BRCMF_WOWL_PFN_FOUND)
 152                                 ifp->drvr->feat_flags |=
 153                                         BIT(BRCMF_FEAT_WOWL_ND);
 154                         if (wowl_cap & BRCMF_WOWL_GTK_FAILURE)
 155                                 ifp->drvr->feat_flags |=
 156                                         BIT(BRCMF_FEAT_WOWL_GTK);
 157                 }
 158         }
 159         /* MBSS does not work for 43362 */
 160         if (drvr->bus_if->chip == BRCM_CC_43362_CHIP_ID)
 161                 ifp->drvr->feat_flags &= ~BIT(BRCMF_FEAT_MBSS);
 162         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
 163         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
 164         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MFP, "mfp");
 165
 166         pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
 167         err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
 168                                        sizeof(pfn_mac));
 169         if (!err)
 170                 ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);
 171
 172         if (drvr->settings->feature_disable) {
 173                 brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
 174                           ifp->drvr->feat_flags,
 175                           drvr->settings->feature_disable);
 176                 ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
 177         }
 178
 179         /* set chip related quirks */
 180         switch (drvr->bus_if->chip) {
 181         case BRCM_CC_43236_CHIP_ID:
 182                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
 183                 break;
 184         case BRCM_CC_4329_CHIP_ID:
 185                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
 186                 break;
 187         default:
 188                 /* no quirks */
 189                 break;
 190         }
 191
 192         brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
 193 }
 194
 195 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
 196 {
 197         return (ifp->drvr->feat_flags & BIT(id));
 198 }
 199
 200 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
 201                                  enum brcmf_feat_quirk quirk)
 202 {
 203         return (ifp->drvr->chip_quirks & BIT(quirk));
 204 }