1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (c) 2014 Broadcom Corporation
4 */
5
6 #include <linux/netdevice.h>
7 #include <linux/module.h>
8
9 #include <brcm_hw_ids.h>
10 #include <brcmu_wifi.h>
11 #include "core.h"
12 #include "bus.h"
13 #include "debug.h"
14 #include "fwil.h"
15 #include "fwil_types.h"
16 #include "feature.h"
17 #include "common.h"
18
19 #define BRCMF_FW_UNSUPPORTED 23
20
21 /*
22 * expand feature list to array of feature strings.
23 */
24 #define BRCMF_FEAT_DEF(_f) \
25 #_f,
26 static const char *brcmf_feat_names[] = {
27 BRCMF_FEAT_LIST
28 };
29 #undef BRCMF_FEAT_DEF
30
31 struct brcmf_feat_fwcap {
32 enum brcmf_feat_id feature;
33 const char * const fwcap_id;
34 };
35
36 static const struct brcmf_feat_fwcap brcmf_fwcap_map[] = {
37 { BRCMF_FEAT_MBSS, "mbss" },
38 { BRCMF_FEAT_MCHAN, "mchan" },
39 { BRCMF_FEAT_P2P, "p2p" },
40 { BRCMF_FEAT_MONITOR, "monitor" },
41 { BRCMF_FEAT_MONITOR_FLAG, "rtap" },
42 { BRCMF_FEAT_MONITOR_FMT_RADIOTAP, "rtap" },
43 { BRCMF_FEAT_DOT11H, "802.11h" },
44 { BRCMF_FEAT_SAE, "sae" },
45 { BRCMF_FEAT_FWAUTH, "idauth" },
46 };
47
48 #ifdef DEBUG
49 /*
50 * expand quirk list to array of quirk strings.
51 */
52 #define BRCMF_QUIRK_DEF(_q) \
53 #_q,
54 static const char * const brcmf_quirk_names[] = {
55 BRCMF_QUIRK_LIST
56 };
57 #undef BRCMF_QUIRK_DEF
58
59 /**
60 * brcmf_feat_debugfs_read() - expose feature info to debugfs.
61 *
62 * @seq: sequence for debugfs entry.
63 * @data: raw data pointer.
64 */
brcmf_feat_debugfs_read(struct seq_file * seq,void * data)65 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
66 {
67 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
68 u32 feats = bus_if->drvr->feat_flags;
69 u32 quirks = bus_if->drvr->chip_quirks;
70 int id;
71
72 seq_printf(seq, "Features: %08x\n", feats);
73 for (id = 0; id < BRCMF_FEAT_LAST; id++)
74 if (feats & BIT(id))
75 seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
76 seq_printf(seq, "\nQuirks: %08x\n", quirks);
77 for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
78 if (quirks & BIT(id))
79 seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
80 return 0;
81 }
82 #else
brcmf_feat_debugfs_read(struct seq_file * seq,void * data)83 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
84 {
85 return 0;
86 }
87 #endif /* DEBUG */
88
89 struct brcmf_feat_fwfeat {
90 const char * const fwid;
91 u32 feat_flags;
92 };
93
94 static const struct brcmf_feat_fwfeat brcmf_feat_fwfeat_map[] = {
95 /* brcmfmac43602-pcie.ap.bin from linux-firmware.git commit ea1178515b88 */
96 { "01-6cb8e269", BIT(BRCMF_FEAT_MONITOR) },
97 /* brcmfmac4366b-pcie.bin from linux-firmware.git commit 52442afee990 */
98 { "01-c47a91a4", BIT(BRCMF_FEAT_MONITOR) },
99 /* brcmfmac4366b-pcie.bin from linux-firmware.git commit 211de1679a68 */
100 { "01-801fb449", BIT(BRCMF_FEAT_MONITOR_FMT_HW_RX_HDR) },
101 /* brcmfmac4366c-pcie.bin from linux-firmware.git commit 211de1679a68 */
102 { "01-d2cbb8fd", BIT(BRCMF_FEAT_MONITOR_FMT_HW_RX_HDR) },
103 };
104
brcmf_feat_firmware_overrides(struct brcmf_pub * drv)105 static void brcmf_feat_firmware_overrides(struct brcmf_pub *drv)
106 {
107 const struct brcmf_feat_fwfeat *e;
108 u32 feat_flags = 0;
109 int i;
110
111 for (i = 0; i < ARRAY_SIZE(brcmf_feat_fwfeat_map); i++) {
112 e = &brcmf_feat_fwfeat_map[i];
113 if (!strcmp(e->fwid, drv->fwver)) {
114 feat_flags = e->feat_flags;
115 break;
116 }
117 }
118
119 if (!feat_flags)
120 return;
121
122 for (i = 0; i < BRCMF_FEAT_LAST; i++)
123 if (feat_flags & BIT(i))
124 brcmf_dbg(INFO, "enabling firmware feature: %s\n",
125 brcmf_feat_names[i]);
126 drv->feat_flags |= feat_flags;
127 }
128
129 /**
130 * brcmf_feat_iovar_int_get() - determine feature through iovar query.
131 *
132 * @ifp: interface to query.
133 * @id: feature id.
134 * @name: iovar name.
135 */
brcmf_feat_iovar_int_get(struct brcmf_if * ifp,enum brcmf_feat_id id,char * name)136 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
137 enum brcmf_feat_id id, char *name)
138 {
139 u32 data;
140 int err;
141
142 /* we need to know firmware error */
143 ifp->fwil_fwerr = true;
144
145 err = brcmf_fil_iovar_int_get(ifp, name, &data);
146 if (err == 0) {
147 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
148 ifp->drvr->feat_flags |= BIT(id);
149 } else {
150 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
151 brcmf_feat_names[id], err);
152 }
153
154 ifp->fwil_fwerr = false;
155 }
156
brcmf_feat_iovar_data_set(struct brcmf_if * ifp,enum brcmf_feat_id id,char * name,const void * data,size_t len)157 static void brcmf_feat_iovar_data_set(struct brcmf_if *ifp,
158 enum brcmf_feat_id id, char *name,
159 const void *data, size_t len)
160 {
161 int err;
162
163 /* we need to know firmware error */
164 ifp->fwil_fwerr = true;
165
166 err = brcmf_fil_iovar_data_set(ifp, name, data, len);
167 if (err != -BRCMF_FW_UNSUPPORTED) {
168 brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
169 ifp->drvr->feat_flags |= BIT(id);
170 } else {
171 brcmf_dbg(TRACE, "%s feature check failed: %d\n",
172 brcmf_feat_names[id], err);
173 }
174
175 ifp->fwil_fwerr = false;
176 }
177
178 #define MAX_CAPS_BUFFER_SIZE 768
brcmf_feat_firmware_capabilities(struct brcmf_if * ifp)179 static void brcmf_feat_firmware_capabilities(struct brcmf_if *ifp)
180 {
181 struct brcmf_pub *drvr = ifp->drvr;
182 char caps[MAX_CAPS_BUFFER_SIZE];
183 enum brcmf_feat_id id;
184 int i, err;
185
186 err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
187 if (err) {
188 bphy_err(drvr, "could not get firmware cap (%d)\n", err);
189 return;
190 }
191
192 brcmf_dbg(INFO, "[ %s]\n", caps);
193
194 for (i = 0; i < ARRAY_SIZE(brcmf_fwcap_map); i++) {
195 if (strnstr(caps, brcmf_fwcap_map[i].fwcap_id, sizeof(caps))) {
196 id = brcmf_fwcap_map[i].feature;
197 brcmf_dbg(INFO, "enabling feature: %s\n",
198 brcmf_feat_names[id]);
199 ifp->drvr->feat_flags |= BIT(id);
200 }
201 }
202 }
203
204 /**
205 * brcmf_feat_fwcap_debugfs_read() - expose firmware capabilities to debugfs.
206 *
207 * @seq: sequence for debugfs entry.
208 * @data: raw data pointer.
209 */
brcmf_feat_fwcap_debugfs_read(struct seq_file * seq,void * data)210 static int brcmf_feat_fwcap_debugfs_read(struct seq_file *seq, void *data)
211 {
212 struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
213 struct brcmf_pub *drvr = bus_if->drvr;
214 struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
215 char caps[MAX_CAPS_BUFFER_SIZE + 1] = { };
216 char *tmp;
217 int err;
218
219 err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
220 if (err) {
221 bphy_err(drvr, "could not get firmware cap (%d)\n", err);
222 return err;
223 }
224
225 /* Put every capability in a new line */
226 for (tmp = caps; *tmp; tmp++) {
227 if (*tmp == ' ')
228 *tmp = '\n';
229 }
230
231 /* Usually there is a space at the end of capabilities string */
232 seq_printf(seq, "%s", caps);
233 /* So make sure we don't print two line breaks */
234 if (tmp > caps && *(tmp - 1) != '\n')
235 seq_printf(seq, "\n");
236
237 return 0;
238 }
239
brcmf_feat_attach(struct brcmf_pub * drvr)240 void brcmf_feat_attach(struct brcmf_pub *drvr)
241 {
242 struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
243 struct brcmf_pno_macaddr_le pfn_mac;
244 struct brcmf_gscan_config gscan_cfg;
245 u32 wowl_cap;
246 s32 err;
247
248 brcmf_feat_firmware_capabilities(ifp);
249 memset(&gscan_cfg, 0, sizeof(gscan_cfg));
250 if (drvr->bus_if->chip != BRCM_CC_43430_CHIP_ID &&
251 drvr->bus_if->chip != BRCM_CC_4345_CHIP_ID &&
252 drvr->bus_if->chip != BRCM_CC_43454_CHIP_ID &&
253 drvr->bus_if->chip != CY_CC_43439_CHIP_ID)
254 brcmf_feat_iovar_data_set(ifp, BRCMF_FEAT_GSCAN,
255 "pfn_gscan_cfg",
256 &gscan_cfg, sizeof(gscan_cfg));
257 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
258 if (drvr->bus_if->wowl_supported)
259 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
260 if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL)) {
261 err = brcmf_fil_iovar_int_get(ifp, "wowl_cap", &wowl_cap);
262 if (!err) {
263 ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_WOWL_ARP_ND);
264 if (wowl_cap & BRCMF_WOWL_PFN_FOUND)
265 ifp->drvr->feat_flags |=
266 BIT(BRCMF_FEAT_WOWL_ND);
267 if (wowl_cap & BRCMF_WOWL_GTK_FAILURE)
268 ifp->drvr->feat_flags |=
269 BIT(BRCMF_FEAT_WOWL_GTK);
270 }
271 }
272 /* MBSS does not work for all chips */
273 switch (drvr->bus_if->chip) {
274 case BRCM_CC_4330_CHIP_ID:
275 case BRCM_CC_43362_CHIP_ID:
276 ifp->drvr->feat_flags &= ~BIT(BRCMF_FEAT_MBSS);
277 break;
278 default:
279 break;
280 }
281 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
282 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
283 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MFP, "mfp");
284
285 pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
286 err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
287 sizeof(pfn_mac));
288 if (!err)
289 ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);
290
291 brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");
292
293 if (drvr->settings->feature_disable) {
294 brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
295 ifp->drvr->feat_flags,
296 drvr->settings->feature_disable);
297 ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
298 }
299
300 brcmf_feat_firmware_overrides(drvr);
301
302 /* set chip related quirks */
303 switch (drvr->bus_if->chip) {
304 case BRCM_CC_43236_CHIP_ID:
305 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
306 break;
307 case BRCM_CC_4329_CHIP_ID:
308 drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
309 break;
310 default:
311 /* no quirks */
312 break;
313 }
314 }
315
brcmf_feat_debugfs_create(struct brcmf_pub * drvr)316 void brcmf_feat_debugfs_create(struct brcmf_pub *drvr)
317 {
318 brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
319 brcmf_debugfs_add_entry(drvr, "fwcap", brcmf_feat_fwcap_debugfs_read);
320 }
321
brcmf_feat_is_enabled(struct brcmf_if * ifp,enum brcmf_feat_id id)322 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
323 {
324 return (ifp->drvr->feat_flags & BIT(id));
325 }
326
brcmf_feat_is_quirk_enabled(struct brcmf_if * ifp,enum brcmf_feat_quirk quirk)327 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
328 enum brcmf_feat_quirk quirk)
329 {
330 return (ifp->drvr->chip_quirks & BIT(quirk));
331 }
332