kernel/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 "core.h"
  21 #include "bus.h"
  22 #include "debug.h"
  23 #include "fwil.h"
  24 #include "feature.h"
  25
  26 /*
  27  * expand feature list to array of feature strings.
  28  */
  29 #define BRCMF_FEAT_DEF(_f) \
  30         #_f,
  31 static const char *brcmf_feat_names[] = {
  32         BRCMF_FEAT_LIST
  33 };
  34 #undef BRCMF_FEAT_DEF
  35
  36 #ifdef DEBUG
  37 /*
  38  * expand quirk list to array of quirk strings.
  39  */
  40 #define BRCMF_QUIRK_DEF(_q) \
  41         #_q,
  42 static const char * const brcmf_quirk_names[] = {
  43         BRCMF_QUIRK_LIST
  44 };
  45 #undef BRCMF_QUIRK_DEF
  46
  47 /**
  48  * brcmf_feat_debugfs_read() - expose feature info to debugfs.
  49  *
  50  * @seq: sequence for debugfs entry.
  51  * @data: raw data pointer.
  52  */
  53 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  54 {
  55         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
  56         u32 feats = bus_if->drvr->feat_flags;
  57         u32 quirks = bus_if->drvr->chip_quirks;
  58         int id;
  59
  60         seq_printf(seq, "Features: %08x\n", feats);
  61         for (id = 0; id < BRCMF_FEAT_LAST; id++)
  62                 if (feats & BIT(id))
  63                         seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
  64         seq_printf(seq, "\nQuirks:   %08x\n", quirks);
  65         for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
  66                 if (quirks & BIT(id))
  67                         seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
  68         return 0;
  69 }
  70 #else
  71 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  72 {
  73         return 0;
  74 }
  75 #endif /* DEBUG */
  76
  77 /**
  78  * brcmf_feat_iovar_int_get() - determine feature through iovar query.
  79  *
  80  * @ifp: interface to query.
  81  * @id: feature id.
  82  * @name: iovar name.
  83  */
  84 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
  85                                      enum brcmf_feat_id id, char *name)
  86 {
  87         u32 data;
  88         int err;
  89
  90         err = brcmf_fil_iovar_int_get(ifp, name, &data);
  91         if (err == 0) {
  92                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
  93                 ifp->drvr->feat_flags |= BIT(id);
  94         } else {
  95                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
  96                           brcmf_feat_names[id], err);
  97         }
  98 }
  99
 100 /**
 101  * brcmf_feat_iovar_int_set() - determine feature through iovar set.
 102  *
 103  * @ifp: interface to query.
 104  * @id: feature id.
 105  * @name: iovar name.
 106  */
 107 static void brcmf_feat_iovar_int_set(struct brcmf_if *ifp,
 108                                      enum brcmf_feat_id id, char *name, u32 val)
 109 {
 110         int err;
 111
 112         err = brcmf_fil_iovar_int_set(ifp, name, val);
 113         if (err == 0) {
 114                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 115                 ifp->drvr->feat_flags |= BIT(id);
 116         } else {
 117                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 118                           brcmf_feat_names[id], err);
 119         }
 120 }
 121
 122 void brcmf_feat_attach(struct brcmf_pub *drvr)
 123 {
 124         struct brcmf_if *ifp = drvr->iflist[0];
 125
 126         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MCHAN, "mchan");
 127         if (drvr->bus_if->wowl_supported)
 128                 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
 129         if (drvr->bus_if->chip != BRCM_CC_43362_CHIP_ID)
 130                 brcmf_feat_iovar_int_set(ifp, BRCMF_FEAT_MBSS, "mbss", 0);
 131
 132         /* set chip related quirks */
 133         switch (drvr->bus_if->chip) {
 134         case BRCM_CC_43236_CHIP_ID:
 135                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
 136                 break;
 137         case BRCM_CC_4329_CHIP_ID:
 138                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
 139                 break;
 140         default:
 141                 /* no quirks */
 142                 break;
 143         }
 144
 145         brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
 146 }
 147
 148 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
 149 {
 150         return (ifp->drvr->feat_flags & BIT(id));
 151 }
 152
 153 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
 154                                  enum brcmf_feat_quirk quirk)
 155 {
 156         return (ifp->drvr->chip_quirks & BIT(quirk));
 157 }