drivers/net/wireless/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
  19 #include <brcm_hw_ids.h>
  20 #include "dhd.h"
  21 #include "dhd_bus.h"
  22 #include "dhd_dbg.h"
  23 #include "fwil.h"
  24 #include "feature.h"
  25
  26 /*
  27  * firmware error code received if iovar is unsupported.
  28  */
  29 #define EBRCMF_FEAT_UNSUPPORTED         23
  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 #ifdef DEBUG
  42 /*
  43  * expand quirk list to array of quirk strings.
  44  */
  45 #define BRCMF_QUIRK_DEF(_q) \
  46         #_q,
  47 static const char * const brcmf_quirk_names[] = {
  48         BRCMF_QUIRK_LIST
  49 };
  50 #undef BRCMF_QUIRK_DEF
  51
  52 /**
  53  * brcmf_feat_debugfs_read() - expose feature info to debugfs.
  54  *
  55  * @seq: sequence for debugfs entry.
  56  * @data: raw data pointer.
  57  */
  58 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  59 {
  60         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
  61         u32 feats = bus_if->drvr->feat_flags;
  62         u32 quirks = bus_if->drvr->chip_quirks;
  63         int id;
  64
  65         seq_printf(seq, "Features: %08x\n", feats);
  66         for (id = 0; id < BRCMF_FEAT_LAST; id++)
  67                 if (feats & BIT(id))
  68                         seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
  69         seq_printf(seq, "\nQuirks:   %08x\n", quirks);
  70         for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
  71                 if (quirks & BIT(id))
  72                         seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
  73         return 0;
  74 }
  75 #else
  76 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  77 {
  78         return 0;
  79 }
  80 #endif /* DEBUG */
  81
  82 /**
  83  * brcmf_feat_iovar_int_get() - determine feature through iovar query.
  84  *
  85  * @ifp: interface to query.
  86  * @id: feature id.
  87  * @name: iovar name.
  88  */
  89 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
  90                                      enum brcmf_feat_id id, char *name)
  91 {
  92         u32 data;
  93         int err;
  94
  95         err = brcmf_fil_iovar_int_get(ifp, name, &data);
  96         if (err == 0) {
  97                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
  98                 ifp->drvr->feat_flags |= BIT(id);
  99         } else {
 100                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 101                           brcmf_feat_names[id], err);
 102         }
 103 }
 104
 105 void brcmf_feat_attach(struct brcmf_pub *drvr)
 106 {
 107         struct brcmf_if *ifp = drvr->iflist[0];
 108
 109         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MCHAN, "mchan");
 110         if (drvr->bus_if->wowl_supported)
 111                 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
 112
 113         /* set chip related quirks */
 114         switch (drvr->bus_if->chip) {
 115         case BRCM_CC_43236_CHIP_ID:
 116                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
 117                 break;
 118         case BRCM_CC_4329_CHIP_ID:
 119                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
 120                 break;
 121         default:
 122                 /* no quirks */
 123                 break;
 124         }
 125
 126         brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
 127 }
 128
 129 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
 130 {
 131         return (ifp->drvr->feat_flags & BIT(id));
 132 }
 133
 134 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
 135                                  enum brcmf_feat_quirk quirk)
 136 {
 137         return (ifp->drvr->chip_quirks & BIT(quirk));
 138 }