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,
26static const char *brcmf_feat_names[] = {
27	BRCMF_FEAT_LIST
28};
29#undef BRCMF_FEAT_DEF
30
31struct brcmf_feat_fwcap {
32	enum brcmf_feat_id feature;
33	const char * const fwcap_id;
34};
35
36static 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,
54static 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 */
65static 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
83static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
84{
85	return 0;
86}
87#endif /* DEBUG */
88
89struct brcmf_feat_fwfeat {
90	const char * const fwid;
91	u32 feat_flags;
92};
93
94static 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
105static 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 */
136static 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
157static 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
179static 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 */
210static 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
240void 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		brcmf_feat_iovar_data_set(ifp, BRCMF_FEAT_GSCAN,
253					  "pfn_gscan_cfg",
254					  &gscan_cfg, sizeof(gscan_cfg));
255	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
256	if (drvr->bus_if->wowl_supported)
257		brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
258	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL)) {
259		err = brcmf_fil_iovar_int_get(ifp, "wowl_cap", &wowl_cap);
260		if (!err) {
261			ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_WOWL_ARP_ND);
262			if (wowl_cap & BRCMF_WOWL_PFN_FOUND)
263				ifp->drvr->feat_flags |=
264					BIT(BRCMF_FEAT_WOWL_ND);
265			if (wowl_cap & BRCMF_WOWL_GTK_FAILURE)
266				ifp->drvr->feat_flags |=
267					BIT(BRCMF_FEAT_WOWL_GTK);
268		}
269	}
270	/* MBSS does not work for all chips */
271	switch (drvr->bus_if->chip) {
272	case BRCM_CC_4330_CHIP_ID:
273	case BRCM_CC_43362_CHIP_ID:
274		ifp->drvr->feat_flags &= ~BIT(BRCMF_FEAT_MBSS);
275		break;
276	default:
277		break;
278	}
279	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
280	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
281	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MFP, "mfp");
282
283	pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
284	err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
285				       sizeof(pfn_mac));
286	if (!err)
287		ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);
288
289	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");
290
291	if (drvr->settings->feature_disable) {
292		brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
293			  ifp->drvr->feat_flags,
294			  drvr->settings->feature_disable);
295		ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
296	}
297
298	brcmf_feat_firmware_overrides(drvr);
299
300	/* set chip related quirks */
301	switch (drvr->bus_if->chip) {
302	case BRCM_CC_43236_CHIP_ID:
303		drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
304		break;
305	case BRCM_CC_4329_CHIP_ID:
306		drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
307		break;
308	default:
309		/* no quirks */
310		break;
311	}
312}
313
314void brcmf_feat_debugfs_create(struct brcmf_pub *drvr)
315{
316	brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
317	brcmf_debugfs_add_entry(drvr, "fwcap", brcmf_feat_fwcap_debugfs_read);
318}
319
320bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
321{
322	return (ifp->drvr->feat_flags & BIT(id));
323}
324
325bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
326				 enum brcmf_feat_quirk quirk)
327{
328	return (ifp->drvr->chip_quirks & BIT(quirk));
329}
330