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