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 #include <linux/module.h>
  19
  20 #include <brcm_hw_ids.h>
  21 #include "core.h"
  22 #include "bus.h"
  23 #include "debug.h"
  24 #include "fwil.h"
  25 #include "feature.h"
  26
  27
  28 /* Module param feature_disable (global for all devices) */
  29 static int brcmf_feature_disable;
  30 module_param_named(feature_disable, brcmf_feature_disable, int, 0);
  31 MODULE_PARM_DESC(feature_disable, "Disable features");
  32
  33 /*
  34  * expand feature list to array of feature strings.
  35  */
  36 #define BRCMF_FEAT_DEF(_f) \
  37         #_f,
  38 static const char *brcmf_feat_names[] = {
  39         BRCMF_FEAT_LIST
  40 };
  41 #undef BRCMF_FEAT_DEF
  42
  43 #ifdef DEBUG
  44 /*
  45  * expand quirk list to array of quirk strings.
  46  */
  47 #define BRCMF_QUIRK_DEF(_q) \
  48         #_q,
  49 static const char * const brcmf_quirk_names[] = {
  50         BRCMF_QUIRK_LIST
  51 };
  52 #undef BRCMF_QUIRK_DEF
  53
  54 /**
  55  * brcmf_feat_debugfs_read() - expose feature info to debugfs.
  56  *
  57  * @seq: sequence for debugfs entry.
  58  * @data: raw data pointer.
  59  */
  60 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  61 {
  62         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
  63         u32 feats = bus_if->drvr->feat_flags;
  64         u32 quirks = bus_if->drvr->chip_quirks;
  65         int id;
  66
  67         seq_printf(seq, "Features: %08x\n", feats);
  68         for (id = 0; id < BRCMF_FEAT_LAST; id++)
  69                 if (feats & BIT(id))
  70                         seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
  71         seq_printf(seq, "\nQuirks:   %08x\n", quirks);
  72         for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
  73                 if (quirks & BIT(id))
  74                         seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
  75         return 0;
  76 }
  77 #else
  78 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
  79 {
  80         return 0;
  81 }
  82 #endif /* DEBUG */
  83
  84 /**
  85  * brcmf_feat_iovar_int_get() - determine feature through iovar query.
  86  *
  87  * @ifp: interface to query.
  88  * @id: feature id.
  89  * @name: iovar name.
  90  */
  91 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
  92                                      enum brcmf_feat_id id, char *name)
  93 {
  94         u32 data;
  95         int err;
  96
  97         err = brcmf_fil_iovar_int_get(ifp, name, &data);
  98         if (err == 0) {
  99                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 100                 ifp->drvr->feat_flags |= BIT(id);
 101         } else {
 102                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 103                           brcmf_feat_names[id], err);
 104         }
 105 }
 106
 107 /**
 108  * brcmf_feat_iovar_int_set() - determine feature through iovar set.
 109  *
 110  * @ifp: interface to query.
 111  * @id: feature id.
 112  * @name: iovar name.
 113  */
 114 static void brcmf_feat_iovar_int_set(struct brcmf_if *ifp,
 115                                      enum brcmf_feat_id id, char *name, u32 val)
 116 {
 117         int err;
 118
 119         err = brcmf_fil_iovar_int_set(ifp, name, val);
 120         if (err == 0) {
 121                 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 122                 ifp->drvr->feat_flags |= BIT(id);
 123         } else {
 124                 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 125                           brcmf_feat_names[id], err);
 126         }
 127 }
 128
 129 void brcmf_feat_attach(struct brcmf_pub *drvr)
 130 {
 131         struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
 132
 133         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MCHAN, "mchan");
 134         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
 135         if (drvr->bus_if->wowl_supported)
 136                 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
 137         if (drvr->bus_if->chip != BRCM_CC_43362_CHIP_ID)
 138                 brcmf_feat_iovar_int_set(ifp, BRCMF_FEAT_MBSS, "mbss", 0);
 139         brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_P2P, "p2p");
 140
 141         if (brcmf_feature_disable) {
 142                 brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
 143                           ifp->drvr->feat_flags, brcmf_feature_disable);
 144                 ifp->drvr->feat_flags &= ~brcmf_feature_disable;
 145         }
 146
 147         /* set chip related quirks */
 148         switch (drvr->bus_if->chip) {
 149         case BRCM_CC_43236_CHIP_ID:
 150                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
 151                 break;
 152         case BRCM_CC_4329_CHIP_ID:
 153                 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
 154                 break;
 155         default:
 156                 /* no quirks */
 157                 break;
 158         }
 159
 160         brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
 161 }
 162
 163 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
 164 {
 165         return (ifp->drvr->feat_flags & BIT(id));
 166 }
 167
 168 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
 169                                  enum brcmf_feat_quirk quirk)
 170 {
 171         return (ifp->drvr->chip_quirks & BIT(quirk));
 172 }