drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c - linux - Git at Google

 /*
  * Copyright (c) 2014 Broadcom Corporation
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include <linux/netdevice.h>
 #include <linux/module.h>

 #include <brcm_hw_ids.h>
 #include <brcmu_wifi.h>
 #include "core.h"
 #include "bus.h"
 #include "debug.h"
 #include "fwil.h"
 #include "fwil_types.h"
 #include "feature.h"
 #include "common.h"

 #define BRCMF_FW_UNSUPPORTED	23

 /*
  * expand feature list to array of feature strings.
  */
 #define BRCMF_FEAT_DEF(_f) \
 	#_f,
 static const char *brcmf_feat_names[] = {
 	BRCMF_FEAT_LIST
 };
 #undef BRCMF_FEAT_DEF

 struct brcmf_feat_fwcap {
 	enum brcmf_feat_id feature;
 	const char * const fwcap_id;
 };

 static const struct brcmf_feat_fwcap brcmf_fwcap_map[] = {
 	{ BRCMF_FEAT_MBSS, "mbss" },
 	{ BRCMF_FEAT_MCHAN, "mchan" },
 	{ BRCMF_FEAT_P2P, "p2p" },
 	{ BRCMF_FEAT_MONITOR, "monitor" },
 	{ BRCMF_FEAT_MONITOR_FMT_RADIOTAP, "rtap" },
 };

 #ifdef DEBUG
 /*
  * expand quirk list to array of quirk strings.
  */
 #define BRCMF_QUIRK_DEF(_q) \
 	#_q,
 static const char * const brcmf_quirk_names[] = {
 	BRCMF_QUIRK_LIST
 };
 #undef BRCMF_QUIRK_DEF

 /**
  * brcmf_feat_debugfs_read() - expose feature info to debugfs.
  *
  * @seq: sequence for debugfs entry.
  * @data: raw data pointer.
  */
 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
 {
 	struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
 	u32 feats = bus_if->drvr->feat_flags;
 	u32 quirks = bus_if->drvr->chip_quirks;
 	int id;

 	seq_printf(seq, "Features: %08x\n", feats);
 	for (id = 0; id < BRCMF_FEAT_LAST; id++)
 		if (feats & BIT(id))
 			seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
 	seq_printf(seq, "\nQuirks:   %08x\n", quirks);
 	for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
 		if (quirks & BIT(id))
 			seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
 	return 0;
 }
 #else
 static int brcmf_feat_debugfs_read(struct seq_file *seq, void *data)
 {
 	return 0;
 }
 #endif /* DEBUG */

 struct brcmf_feat_fwfeat {
 	const char * const fwid;
 	u32 feat_flags;
 };

 static const struct brcmf_feat_fwfeat brcmf_feat_fwfeat_map[] = {
 	/* brcmfmac43602-pcie.ap.bin from linux-firmware.git commit ea1178515b88 */
 	{ "01-6cb8e269", BIT(BRCMF_FEAT_MONITOR) },
 	/* brcmfmac4366b-pcie.bin from linux-firmware.git commit 52442afee990 */
 	{ "01-c47a91a4", BIT(BRCMF_FEAT_MONITOR) },
 };

 static void brcmf_feat_firmware_overrides(struct brcmf_pub *drv)
 {
 	const struct brcmf_feat_fwfeat *e;
 	u32 feat_flags = 0;
 	int i;

 	for (i = 0; i < ARRAY_SIZE(brcmf_feat_fwfeat_map); i++) {
 		e = &brcmf_feat_fwfeat_map[i];
 		if (!strcmp(e->fwid, drv->fwver)) {
 			feat_flags = e->feat_flags;
 			break;
 		}
 	}

 	if (!feat_flags)
 		return;

 	for (i = 0; i < BRCMF_FEAT_LAST; i++)
 		if (feat_flags & BIT(i))
 			brcmf_dbg(INFO, "enabling firmware feature: %s\n",
 				  brcmf_feat_names[i]);
 	drv->feat_flags |= feat_flags;
 }

 /**
  * brcmf_feat_iovar_int_get() - determine feature through iovar query.
  *
  * @ifp: interface to query.
  * @id: feature id.
  * @name: iovar name.
  */
 static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
 				     enum brcmf_feat_id id, char *name)
 {
 	u32 data;
 	int err;

 	/* we need to know firmware error */
 	ifp->fwil_fwerr = true;

 	err = brcmf_fil_iovar_int_get(ifp, name, &data);
 	if (err == 0) {
 		brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 		ifp->drvr->feat_flags |= BIT(id);
 	} else {
 		brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 			  brcmf_feat_names[id], err);
 	}

 	ifp->fwil_fwerr = false;
 }

 static void brcmf_feat_iovar_data_set(struct brcmf_if *ifp,
 				      enum brcmf_feat_id id, char *name,
 				      const void *data, size_t len)
 {
 	int err;

 	/* we need to know firmware error */
 	ifp->fwil_fwerr = true;

 	err = brcmf_fil_iovar_data_set(ifp, name, data, len);
 	if (err != -BRCMF_FW_UNSUPPORTED) {
 		brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
 		ifp->drvr->feat_flags |= BIT(id);
 	} else {
 		brcmf_dbg(TRACE, "%s feature check failed: %d\n",
 			  brcmf_feat_names[id], err);
 	}

 	ifp->fwil_fwerr = false;
 }

 #define MAX_CAPS_BUFFER_SIZE	512
 static void brcmf_feat_firmware_capabilities(struct brcmf_if *ifp)
 {
 	char caps[MAX_CAPS_BUFFER_SIZE];
 	enum brcmf_feat_id id;
 	int i, err;

 	err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
 	if (err) {
 		brcmf_err("could not get firmware cap (%d)\n", err);
 		return;
 	}

 	brcmf_dbg(INFO, "[ %s]\n", caps);

 	for (i = 0; i < ARRAY_SIZE(brcmf_fwcap_map); i++) {
 		if (strnstr(caps, brcmf_fwcap_map[i].fwcap_id, sizeof(caps))) {
 			id = brcmf_fwcap_map[i].feature;
 			brcmf_dbg(INFO, "enabling feature: %s\n",
 				  brcmf_feat_names[id]);
 			ifp->drvr->feat_flags |= BIT(id);
 		}
 	}
 }

 /**
  * brcmf_feat_fwcap_debugfs_read() - expose firmware capabilities to debugfs.
  *
  * @seq: sequence for debugfs entry.
  * @data: raw data pointer.
  */
 static int brcmf_feat_fwcap_debugfs_read(struct seq_file *seq, void *data)
 {
 	struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
 	struct brcmf_if *ifp = brcmf_get_ifp(bus_if->drvr, 0);
 	char caps[MAX_CAPS_BUFFER_SIZE + 1] = { };
 	char *tmp;
 	int err;

 	err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
 	if (err) {
 		brcmf_err("could not get firmware cap (%d)\n", err);
 		return err;
 	}

 	/* Put every capability in a new line */
 	for (tmp = caps; *tmp; tmp++) {
 		if (*tmp == ' ')
 			*tmp = '\n';
 	}

 	/* Usually there is a space at the end of capabilities string */
 	seq_printf(seq, "%s", caps);
 	/* So make sure we don't print two line breaks */
 	if (tmp > caps && *(tmp - 1) != '\n')
 		seq_printf(seq, "\n");

 	return 0;
 }

 void brcmf_feat_attach(struct brcmf_pub *drvr)
 {
 	struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
 	struct brcmf_pno_macaddr_le pfn_mac;
 	struct brcmf_gscan_config gscan_cfg;
 	u32 wowl_cap;
 	s32 err;

 	brcmf_feat_firmware_capabilities(ifp);
 	memset(&gscan_cfg, 0, sizeof(gscan_cfg));
 	if (drvr->bus_if->chip != BRCM_CC_43430_CHIP_ID &&
 	    drvr->bus_if->chip != BRCM_CC_4345_CHIP_ID)
 		brcmf_feat_iovar_data_set(ifp, BRCMF_FEAT_GSCAN,
 					  "pfn_gscan_cfg",
 					  &gscan_cfg, sizeof(gscan_cfg));
 	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
 	if (drvr->bus_if->wowl_supported)
 		brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
 	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL)) {
 		err = brcmf_fil_iovar_int_get(ifp, "wowl_cap", &wowl_cap);
 		if (!err) {
 			ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_WOWL_ARP_ND);
 			if (wowl_cap & BRCMF_WOWL_PFN_FOUND)
 				ifp->drvr->feat_flags |=
 					BIT(BRCMF_FEAT_WOWL_ND);
 			if (wowl_cap & BRCMF_WOWL_GTK_FAILURE)
 				ifp->drvr->feat_flags |=
 					BIT(BRCMF_FEAT_WOWL_GTK);
 		}
 	}
 	/* MBSS does not work for 43362 */
 	if (drvr->bus_if->chip == BRCM_CC_43362_CHIP_ID)
 		ifp->drvr->feat_flags &= ~BIT(BRCMF_FEAT_MBSS);
 	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
 	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
 	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MFP, "mfp");

 	pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
 	err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
 				       sizeof(pfn_mac));
 	if (!err)
 		ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);

 	if (drvr->settings->feature_disable) {
 		brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
 			  ifp->drvr->feat_flags,
 			  drvr->settings->feature_disable);
 		ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
 	}
 	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");

 	brcmf_feat_firmware_overrides(drvr);

 	/* set chip related quirks */
 	switch (drvr->bus_if->chip) {
 	case BRCM_CC_43236_CHIP_ID:
 		drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
 		break;
 	case BRCM_CC_4329_CHIP_ID:
 		drvr->chip_quirks |= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
 		break;
 	default:
 		/* no quirks */
 		break;
 	}
 }

 void brcmf_feat_debugfs_create(struct brcmf_pub *drvr)
 {
 	brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
 	brcmf_debugfs_add_entry(drvr, "fwcap", brcmf_feat_fwcap_debugfs_read);
 }

 bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
 {
 	return (ifp->drvr->feat_flags & BIT(id));
 }

 bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
 				 enum brcmf_feat_quirk quirk)
 {
 	return (ifp->drvr->chip_quirks & BIT(quirk));
 }
	/*
	* Copyright (c) 2014 Broadcom Corporation
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include <linux/netdevice.h>
	#include <linux/module.h>

	#include <brcm_hw_ids.h>
	#include <brcmu_wifi.h>
	#include "core.h"
	#include "bus.h"
	#include "debug.h"
	#include "fwil.h"
	#include "fwil_types.h"
	#include "feature.h"
	#include "common.h"

	#define BRCMF_FW_UNSUPPORTED 23

	/*
	* expand feature list to array of feature strings.
	*/
	#define BRCMF_FEAT_DEF(_f) \
	#_f,
	static const char *brcmf_feat_names[] = {
	BRCMF_FEAT_LIST
	};
	#undef BRCMF_FEAT_DEF

	struct brcmf_feat_fwcap {
	enum brcmf_feat_id feature;
	const char * const fwcap_id;
	};

	static const struct brcmf_feat_fwcap brcmf_fwcap_map[] = {
	{ BRCMF_FEAT_MBSS, "mbss" },
	{ BRCMF_FEAT_MCHAN, "mchan" },
	{ BRCMF_FEAT_P2P, "p2p" },
	{ BRCMF_FEAT_MONITOR, "monitor" },
	{ BRCMF_FEAT_MONITOR_FMT_RADIOTAP, "rtap" },
	};

	#ifdef DEBUG
	/*
	* expand quirk list to array of quirk strings.
	*/
	#define BRCMF_QUIRK_DEF(_q) \
	#_q,
	static const char * const brcmf_quirk_names[] = {
	BRCMF_QUIRK_LIST
	};
	#undef BRCMF_QUIRK_DEF

	/**
	* brcmf_feat_debugfs_read() - expose feature info to debugfs.
	*
	* @seq: sequence for debugfs entry.
	* @data: raw data pointer.
	*/
	static int brcmf_feat_debugfs_read(struct seq_file seq, void data)
	{
	struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
	u32 feats = bus_if->drvr->feat_flags;
	u32 quirks = bus_if->drvr->chip_quirks;
	int id;

	seq_printf(seq, "Features: %08x\n", feats);
	for (id = 0; id < BRCMF_FEAT_LAST; id++)
	if (feats & BIT(id))
	seq_printf(seq, "\t%s\n", brcmf_feat_names[id]);
	seq_printf(seq, "\nQuirks: %08x\n", quirks);
	for (id = 0; id < BRCMF_FEAT_QUIRK_LAST; id++)
	if (quirks & BIT(id))
	seq_printf(seq, "\t%s\n", brcmf_quirk_names[id]);
	return 0;
	}
	#else
	static int brcmf_feat_debugfs_read(struct seq_file seq, void data)
	{
	return 0;
	}
	#endif /* DEBUG */

	struct brcmf_feat_fwfeat {
	const char * const fwid;
	u32 feat_flags;
	};

	static const struct brcmf_feat_fwfeat brcmf_feat_fwfeat_map[] = {
	/* brcmfmac43602-pcie.ap.bin from linux-firmware.git commit ea1178515b88 */
	{ "01-6cb8e269", BIT(BRCMF_FEAT_MONITOR) },
	/* brcmfmac4366b-pcie.bin from linux-firmware.git commit 52442afee990 */
	{ "01-c47a91a4", BIT(BRCMF_FEAT_MONITOR) },
	};

	static void brcmf_feat_firmware_overrides(struct brcmf_pub *drv)
	{
	const struct brcmf_feat_fwfeat *e;
	u32 feat_flags = 0;
	int i;

	for (i = 0; i < ARRAY_SIZE(brcmf_feat_fwfeat_map); i++) {
	e = &brcmf_feat_fwfeat_map[i];
	if (!strcmp(e->fwid, drv->fwver)) {
	feat_flags = e->feat_flags;
	break;
	}
	}

	if (!feat_flags)
	return;

	for (i = 0; i < BRCMF_FEAT_LAST; i++)
	if (feat_flags & BIT(i))
	brcmf_dbg(INFO, "enabling firmware feature: %s\n",
	brcmf_feat_names[i]);
	drv->feat_flags \|= feat_flags;
	}

	/**
	* brcmf_feat_iovar_int_get() - determine feature through iovar query.
	*
	* @ifp: interface to query.
	* @id: feature id.
	* @name: iovar name.
	*/
	static void brcmf_feat_iovar_int_get(struct brcmf_if *ifp,
	enum brcmf_feat_id id, char *name)
	{
	u32 data;
	int err;

	/* we need to know firmware error */
	ifp->fwil_fwerr = true;

	err = brcmf_fil_iovar_int_get(ifp, name, &data);
	if (err == 0) {
	brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
	ifp->drvr->feat_flags \|= BIT(id);
	} else {
	brcmf_dbg(TRACE, "%s feature check failed: %d\n",
	brcmf_feat_names[id], err);
	}

	ifp->fwil_fwerr = false;
	}

	static void brcmf_feat_iovar_data_set(struct brcmf_if *ifp,
	enum brcmf_feat_id id, char *name,
	const void *data, size_t len)
	{
	int err;

	/* we need to know firmware error */
	ifp->fwil_fwerr = true;

	err = brcmf_fil_iovar_data_set(ifp, name, data, len);
	if (err != -BRCMF_FW_UNSUPPORTED) {
	brcmf_dbg(INFO, "enabling feature: %s\n", brcmf_feat_names[id]);
	ifp->drvr->feat_flags \|= BIT(id);
	} else {
	brcmf_dbg(TRACE, "%s feature check failed: %d\n",
	brcmf_feat_names[id], err);
	}

	ifp->fwil_fwerr = false;
	}

	#define MAX_CAPS_BUFFER_SIZE 512
	static void brcmf_feat_firmware_capabilities(struct brcmf_if *ifp)
	{
	char caps[MAX_CAPS_BUFFER_SIZE];
	enum brcmf_feat_id id;
	int i, err;

	err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
	if (err) {
	brcmf_err("could not get firmware cap (%d)\n", err);
	return;
	}

	brcmf_dbg(INFO, "[ %s]\n", caps);

	for (i = 0; i < ARRAY_SIZE(brcmf_fwcap_map); i++) {
	if (strnstr(caps, brcmf_fwcap_map[i].fwcap_id, sizeof(caps))) {
	id = brcmf_fwcap_map[i].feature;
	brcmf_dbg(INFO, "enabling feature: %s\n",
	brcmf_feat_names[id]);
	ifp->drvr->feat_flags \|= BIT(id);
	}
	}
	}

	/**
	* brcmf_feat_fwcap_debugfs_read() - expose firmware capabilities to debugfs.
	*
	* @seq: sequence for debugfs entry.
	* @data: raw data pointer.
	*/
	static int brcmf_feat_fwcap_debugfs_read(struct seq_file seq, void data)
	{
	struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
	struct brcmf_if *ifp = brcmf_get_ifp(bus_if->drvr, 0);
	char caps[MAX_CAPS_BUFFER_SIZE + 1] = { };
	char *tmp;
	int err;

	err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
	if (err) {
	brcmf_err("could not get firmware cap (%d)\n", err);
	return err;
	}

	/* Put every capability in a new line */
	for (tmp = caps; *tmp; tmp++) {
	if (*tmp == ' ')
	*tmp = '\n';
	}

	/* Usually there is a space at the end of capabilities string */
	seq_printf(seq, "%s", caps);
	/* So make sure we don't print two line breaks */
	if (tmp > caps && *(tmp - 1) != '\n')
	seq_printf(seq, "\n");

	return 0;
	}

	void brcmf_feat_attach(struct brcmf_pub *drvr)
	{
	struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
	struct brcmf_pno_macaddr_le pfn_mac;
	struct brcmf_gscan_config gscan_cfg;
	u32 wowl_cap;
	s32 err;

	brcmf_feat_firmware_capabilities(ifp);
	memset(&gscan_cfg, 0, sizeof(gscan_cfg));
	if (drvr->bus_if->chip != BRCM_CC_43430_CHIP_ID &&
	drvr->bus_if->chip != BRCM_CC_4345_CHIP_ID)
	brcmf_feat_iovar_data_set(ifp, BRCMF_FEAT_GSCAN,
	"pfn_gscan_cfg",
	&gscan_cfg, sizeof(gscan_cfg));
	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
	if (drvr->bus_if->wowl_supported)
	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_WOWL, "wowl");
	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL)) {
	err = brcmf_fil_iovar_int_get(ifp, "wowl_cap", &wowl_cap);
	if (!err) {
	ifp->drvr->feat_flags \|= BIT(BRCMF_FEAT_WOWL_ARP_ND);
	if (wowl_cap & BRCMF_WOWL_PFN_FOUND)
	ifp->drvr->feat_flags \|=
	BIT(BRCMF_FEAT_WOWL_ND);
	if (wowl_cap & BRCMF_WOWL_GTK_FAILURE)
	ifp->drvr->feat_flags \|=
	BIT(BRCMF_FEAT_WOWL_GTK);
	}
	}
	/* MBSS does not work for 43362 */
	if (drvr->bus_if->chip == BRCM_CC_43362_CHIP_ID)
	ifp->drvr->feat_flags &= ~BIT(BRCMF_FEAT_MBSS);
	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MFP, "mfp");

	pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
	err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
	sizeof(pfn_mac));
	if (!err)
	ifp->drvr->feat_flags \|= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);

	if (drvr->settings->feature_disable) {
	brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
	ifp->drvr->feat_flags,
	drvr->settings->feature_disable);
	ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
	}
	brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");

	brcmf_feat_firmware_overrides(drvr);

	/* set chip related quirks */
	switch (drvr->bus_if->chip) {
	case BRCM_CC_43236_CHIP_ID:
	drvr->chip_quirks \|= BIT(BRCMF_FEAT_QUIRK_AUTO_AUTH);
	break;
	case BRCM_CC_4329_CHIP_ID:
	drvr->chip_quirks \|= BIT(BRCMF_FEAT_QUIRK_NEED_MPC);
	break;
	default:
	/* no quirks */
	break;
	}
	}

	void brcmf_feat_debugfs_create(struct brcmf_pub *drvr)
	{
	brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
	brcmf_debugfs_add_entry(drvr, "fwcap", brcmf_feat_fwcap_debugfs_read);
	}

	bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)
	{
	return (ifp->drvr->feat_flags & BIT(id));
	}

	bool brcmf_feat_is_quirk_enabled(struct brcmf_if *ifp,
	enum brcmf_feat_quirk quirk)
	{
	return (ifp->drvr->chip_quirks & BIT(quirk));
	}