GNU Linux-libre 4.9.306-gnu1
[releases.git] / 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 }