Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 984 insertions, 0 deletions

diff --git a/drivers/net/wireless/intersil/p54/eeprom.c b/drivers/net/wireless/intersil/p54/eeprom.c
new file mode 100644
index 000000000..de2ef95c3
--- /dev/null
+++ b/drivers/net/wireless/intersil/p54/eeprom.c
@@ -0,0 +1,984 @@
+/*
+ * EEPROM parser code for mac80211 Prism54 drivers
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * Based on:
+ * - the islsm (softmac prism54) driver, which is:
+ *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ * - stlc45xx driver
+ *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+#include <linux/sort.h>
+#include <linux/slab.h>
+
+#include <net/mac80211.h>
+#include <linux/crc-ccitt.h>
+#include <linux/export.h>
+
+#include "p54.h"
+#include "eeprom.h"
+#include "lmac.h"
+
+static struct ieee80211_rate p54_bgrates[] = {
+	{ .bitrate = 10, .hw_value = 0, },
+	{ .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 60, .hw_value = 4, },
+	{ .bitrate = 90, .hw_value = 5, },
+	{ .bitrate = 120, .hw_value = 6, },
+	{ .bitrate = 180, .hw_value = 7, },
+	{ .bitrate = 240, .hw_value = 8, },
+	{ .bitrate = 360, .hw_value = 9, },
+	{ .bitrate = 480, .hw_value = 10, },
+	{ .bitrate = 540, .hw_value = 11, },
+};
+
+static struct ieee80211_rate p54_arates[] = {
+	{ .bitrate = 60, .hw_value = 4, },
+	{ .bitrate = 90, .hw_value = 5, },
+	{ .bitrate = 120, .hw_value = 6, },
+	{ .bitrate = 180, .hw_value = 7, },
+	{ .bitrate = 240, .hw_value = 8, },
+	{ .bitrate = 360, .hw_value = 9, },
+	{ .bitrate = 480, .hw_value = 10, },
+	{ .bitrate = 540, .hw_value = 11, },
+};
+
+static struct p54_rssi_db_entry p54_rssi_default = {
+	/*
+	 * The defaults are taken from usb-logs of the
+	 * vendor driver. So, they should be safe to
+	 * use in case we can't get a match from the
+	 * rssi <-> dBm conversion database.
+	 */
+	.mul = 130,
+	.add = -398,
+};
+
+#define CHAN_HAS_CAL		BIT(0)
+#define CHAN_HAS_LIMIT		BIT(1)
+#define CHAN_HAS_CURVE		BIT(2)
+#define CHAN_HAS_ALL		(CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
+
+struct p54_channel_entry {
+	u16 freq;
+	u16 data;
+	int index;
+	int max_power;
+	enum nl80211_band band;
+};
+
+struct p54_channel_list {
+	struct p54_channel_entry *channels;
+	size_t entries;
+	size_t max_entries;
+	size_t band_channel_num[NUM_NL80211_BANDS];
+};
+
+static int p54_get_band_from_freq(u16 freq)
+{
+	/* FIXME: sync these values with the 802.11 spec */
+
+	if ((freq >= 2412) && (freq <= 2484))
+		return NL80211_BAND_2GHZ;
+
+	if ((freq >= 4920) && (freq <= 5825))
+		return NL80211_BAND_5GHZ;
+
+	return -1;
+}
+
+static int same_band(u16 freq, u16 freq2)
+{
+	return p54_get_band_from_freq(freq) == p54_get_band_from_freq(freq2);
+}
+
+static int p54_compare_channels(const void *_a,
+				const void *_b)
+{
+	const struct p54_channel_entry *a = _a;
+	const struct p54_channel_entry *b = _b;
+
+	return a->freq - b->freq;
+}
+
+static int p54_compare_rssichan(const void *_a,
+				const void *_b)
+{
+	const struct p54_rssi_db_entry *a = _a;
+	const struct p54_rssi_db_entry *b = _b;
+
+	return a->freq - b->freq;
+}
+
+static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
+				  struct ieee80211_supported_band *band_entry,
+				  enum nl80211_band band)
+{
+	/* TODO: generate rate array dynamically */
+
+	switch (band) {
+	case NL80211_BAND_2GHZ:
+		band_entry->bitrates = p54_bgrates;
+		band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
+		break;
+	case NL80211_BAND_5GHZ:
+		band_entry->bitrates = p54_arates;
+		band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int p54_generate_band(struct ieee80211_hw *dev,
+			     struct p54_channel_list *list,
+			     unsigned int *chan_num,
+			     enum nl80211_band band)
+{
+	struct p54_common *priv = dev->priv;
+	struct ieee80211_supported_band *tmp, *old;
+	unsigned int i, j;
+	int ret = -ENOMEM;
+
+	if ((!list->entries) || (!list->band_channel_num[band]))
+		return -EINVAL;
+
+	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
+	if (!tmp)
+		goto err_out;
+
+	tmp->channels = kcalloc(list->band_channel_num[band],
+				sizeof(struct ieee80211_channel),
+				GFP_KERNEL);
+	if (!tmp->channels)
+		goto err_out;
+
+	ret = p54_fill_band_bitrates(dev, tmp, band);
+	if (ret)
+		goto err_out;
+
+	for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
+			   (i < list->entries); i++) {
+		struct p54_channel_entry *chan = &list->channels[i];
+		struct ieee80211_channel *dest = &tmp->channels[j];
+
+		if (chan->band != band)
+			continue;
+
+		if (chan->data != CHAN_HAS_ALL) {
+			wiphy_err(dev->wiphy, "%s%s%s is/are missing for "
+				  "channel:%d [%d MHz].\n",
+				  (chan->data & CHAN_HAS_CAL ? "" :
+				   " [iqauto calibration data]"),
+				  (chan->data & CHAN_HAS_LIMIT ? "" :
+				   " [output power limits]"),
+				  (chan->data & CHAN_HAS_CURVE ? "" :
+				   " [curve data]"),
+				  chan->index, chan->freq);
+			continue;
+		}
+
+		dest->band = chan->band;
+		dest->center_freq = chan->freq;
+		dest->max_power = chan->max_power;
+		priv->survey[*chan_num].channel = &tmp->channels[j];
+		priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM |
+			SURVEY_INFO_TIME |
+			SURVEY_INFO_TIME_BUSY |
+			SURVEY_INFO_TIME_TX;
+		dest->hw_value = (*chan_num);
+		j++;
+		(*chan_num)++;
+	}
+
+	if (j == 0) {
+		wiphy_err(dev->wiphy, "Disabling totally damaged %d GHz band\n",
+			  (band == NL80211_BAND_2GHZ) ? 2 : 5);
+
+		ret = -ENODATA;
+		goto err_out;
+	}
+
+	tmp->n_channels = j;
+	old = priv->band_table[band];
+	priv->band_table[band] = tmp;
+	if (old) {
+		kfree(old->channels);
+		kfree(old);
+	}
+
+	return 0;
+
+err_out:
+	if (tmp) {
+		kfree(tmp->channels);
+		kfree(tmp);
+	}
+
+	return ret;
+}
+
+static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list,
+							  u16 freq, u16 data)
+{
+	int i;
+	struct p54_channel_entry *entry = NULL;
+
+	/*
+	 * usually all lists in the eeprom are mostly sorted.
+	 * so it's very likely that the entry we are looking for
+	 * is right at the end of the list
+	 */
+	for (i = list->entries; i >= 0; i--) {
+		if (freq == list->channels[i].freq) {
+			entry = &list->channels[i];
+			break;
+		}
+	}
+
+	if ((i < 0) && (list->entries < list->max_entries)) {
+		/* entry does not exist yet. Initialize a new one. */
+		int band = p54_get_band_from_freq(freq);
+
+		/*
+		 * filter out frequencies which don't belong into
+		 * any supported band.
+		 */
+		if (band >= 0) {
+			i = list->entries++;
+			list->band_channel_num[band]++;
+
+			entry = &list->channels[i];
+			entry->freq = freq;
+			entry->band = band;
+			entry->index = ieee80211_frequency_to_channel(freq);
+			entry->max_power = 0;
+			entry->data = 0;
+		}
+	}
+
+	if (entry)
+		entry->data |= data;
+
+	return entry;
+}
+
+static int p54_get_maxpower(struct p54_common *priv, void *data)
+{
+	switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) {
+	case PDR_SYNTH_FRONTEND_LONGBOW: {
+		struct pda_channel_output_limit_longbow *pda = data;
+		int j;
+		u16 rawpower = 0;
+		pda = data;
+		for (j = 0; j < ARRAY_SIZE(pda->point); j++) {
+			struct pda_channel_output_limit_point_longbow *point =
+				&pda->point[j];
+			rawpower = max_t(u16,
+				rawpower, le16_to_cpu(point->val_qpsk));
+			rawpower = max_t(u16,
+				rawpower, le16_to_cpu(point->val_bpsk));
+			rawpower = max_t(u16,
+				rawpower, le16_to_cpu(point->val_16qam));
+			rawpower = max_t(u16,
+				rawpower, le16_to_cpu(point->val_64qam));
+		}
+		/* longbow seems to use 1/16 dBm units */
+		return rawpower / 16;
+		}
+
+	case PDR_SYNTH_FRONTEND_DUETTE3:
+	case PDR_SYNTH_FRONTEND_DUETTE2:
+	case PDR_SYNTH_FRONTEND_FRISBEE:
+	case PDR_SYNTH_FRONTEND_XBOW: {
+		struct pda_channel_output_limit *pda = data;
+		u8 rawpower = 0;
+		rawpower = max(rawpower, pda->val_qpsk);
+		rawpower = max(rawpower, pda->val_bpsk);
+		rawpower = max(rawpower, pda->val_16qam);
+		rawpower = max(rawpower, pda->val_64qam);
+		/* raw values are in 1/4 dBm units */
+		return rawpower / 4;
+		}
+
+	default:
+		return 20;
+	}
+}
+
+static int p54_generate_channel_lists(struct ieee80211_hw *dev)
+{
+	struct p54_common *priv = dev->priv;
+	struct p54_channel_list *list;
+	unsigned int i, j, k, max_channel_num;
+	int ret = 0;
+	u16 freq;
+
+	if ((priv->iq_autocal_len != priv->curve_data->entries) ||
+	    (priv->iq_autocal_len != priv->output_limit->entries))
+		wiphy_err(dev->wiphy,
+			  "Unsupported or damaged EEPROM detected. "
+			  "You may not be able to use all channels.\n");
+
+	max_channel_num = max_t(unsigned int, priv->output_limit->entries,
+				priv->iq_autocal_len);
+	max_channel_num = max_t(unsigned int, max_channel_num,
+				priv->curve_data->entries);
+
+	list = kzalloc(sizeof(*list), GFP_KERNEL);
+	if (!list) {
+		ret = -ENOMEM;
+		goto free;
+	}
+	priv->chan_num = max_channel_num;
+	priv->survey = kcalloc(max_channel_num, sizeof(struct survey_info),
+			       GFP_KERNEL);
+	if (!priv->survey) {
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	list->max_entries = max_channel_num;
+	list->channels = kcalloc(max_channel_num,
+				 sizeof(struct p54_channel_entry),
+				 GFP_KERNEL);
+	if (!list->channels) {
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	for (i = 0; i < max_channel_num; i++) {
+		if (i < priv->iq_autocal_len) {
+			freq = le16_to_cpu(priv->iq_autocal[i].freq);
+			p54_update_channel_param(list, freq, CHAN_HAS_CAL);
+		}
+
+		if (i < priv->output_limit->entries) {
+			struct p54_channel_entry *tmp;
+
+			void *data = (void *) ((unsigned long) i *
+				priv->output_limit->entry_size +
+				priv->output_limit->offset +
+				priv->output_limit->data);
+
+			freq = le16_to_cpup((__le16 *) data);
+			tmp = p54_update_channel_param(list, freq,
+						       CHAN_HAS_LIMIT);
+			if (tmp) {
+				tmp->max_power = p54_get_maxpower(priv, data);
+			}
+		}
+
+		if (i < priv->curve_data->entries) {
+			freq = le16_to_cpup((__le16 *) (i *
+					    priv->curve_data->entry_size +
+					    priv->curve_data->offset +
+					    priv->curve_data->data));
+
+			p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
+		}
+	}
+
+	/* sort the channel list by frequency */
+	sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
+	     p54_compare_channels, NULL);
+
+	k = 0;
+	for (i = 0, j = 0; i < NUM_NL80211_BANDS; i++) {
+		if (p54_generate_band(dev, list, &k, i) == 0)
+			j++;
+	}
+	if (j == 0) {
+		/* no useable band available. */
+		ret = -EINVAL;
+	}
+
+free:
+	if (list) {
+		kfree(list->channels);
+		kfree(list);
+	}
+	if (ret) {
+		kfree(priv->survey);
+		priv->survey = NULL;
+	}
+
+	return ret;
+}
+
+static int p54_convert_rev0(struct ieee80211_hw *dev,
+			    struct pda_pa_curve_data *curve_data)
+{
+	struct p54_common *priv = dev->priv;
+	struct p54_pa_curve_data_sample *dst;
+	struct pda_pa_curve_data_sample_rev0 *src;
+	size_t cd_len = sizeof(*curve_data) +
+		(curve_data->points_per_channel*sizeof(*dst) + 2) *
+		 curve_data->channels;
+	unsigned int i, j;
+	void *source, *target;
+
+	priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
+				   GFP_KERNEL);
+	if (!priv->curve_data)
+		return -ENOMEM;
+
+	priv->curve_data->entries = curve_data->channels;
+	priv->curve_data->entry_size = sizeof(__le16) +
+		sizeof(*dst) * curve_data->points_per_channel;
+	priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
+	priv->curve_data->len = cd_len;
+	memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
+	source = curve_data->data;
+	target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
+	for (i = 0; i < curve_data->channels; i++) {
+		__le16 *freq = source;
+		source += sizeof(__le16);
+		*((__le16 *)target) = *freq;
+		target += sizeof(__le16);
+		for (j = 0; j < curve_data->points_per_channel; j++) {
+			dst = target;
+			src = source;
+
+			dst->rf_power = src->rf_power;
+			dst->pa_detector = src->pa_detector;
+			dst->data_64qam = src->pcv;
+			/* "invent" the points for the other modulations */
+#define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
+			dst->data_16qam = SUB(src->pcv, 12);
+			dst->data_qpsk = SUB(dst->data_16qam, 12);
+			dst->data_bpsk = SUB(dst->data_qpsk, 12);
+			dst->data_barker = SUB(dst->data_bpsk, 14);
+#undef SUB
+			target += sizeof(*dst);
+			source += sizeof(*src);
+		}
+	}
+
+	return 0;
+}
+
+static int p54_convert_rev1(struct ieee80211_hw *dev,
+			    struct pda_pa_curve_data *curve_data)
+{
+	struct p54_common *priv = dev->priv;
+	struct p54_pa_curve_data_sample *dst;
+	struct pda_pa_curve_data_sample_rev1 *src;
+	size_t cd_len = sizeof(*curve_data) +
+		(curve_data->points_per_channel*sizeof(*dst) + 2) *
+		 curve_data->channels;
+	unsigned int i, j;
+	void *source, *target;
+
+	priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
+				   GFP_KERNEL);
+	if (!priv->curve_data)
+		return -ENOMEM;
+
+	priv->curve_data->entries = curve_data->channels;
+	priv->curve_data->entry_size = sizeof(__le16) +
+		sizeof(*dst) * curve_data->points_per_channel;
+	priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
+	priv->curve_data->len = cd_len;
+	memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
+	source = curve_data->data;
+	target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
+	for (i = 0; i < curve_data->channels; i++) {
+		__le16 *freq = source;
+		source += sizeof(__le16);
+		*((__le16 *)target) = *freq;
+		target += sizeof(__le16);
+		for (j = 0; j < curve_data->points_per_channel; j++) {
+			memcpy(target, source, sizeof(*src));
+
+			target += sizeof(*dst);
+			source += sizeof(*src);
+		}
+		source++;
+	}
+
+	return 0;
+}
+
+static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
+	"Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
+
+static int p54_parse_rssical(struct ieee80211_hw *dev,
+			     u8 *data, int len, u16 type)
+{
+	struct p54_common *priv = dev->priv;
+	struct p54_rssi_db_entry *entry;
+	size_t db_len, entries;
+	int offset = 0, i;
+
+	if (type != PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
+		entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
+		if (len != sizeof(struct pda_rssi_cal_entry) * entries) {
+			wiphy_err(dev->wiphy, "rssical size mismatch.\n");
+			goto err_data;
+		}
+	} else {
+		/*
+		 * Some devices (Dell 1450 USB, Xbow 5GHz card, etc...)
+		 * have an empty two byte header.
+		 */
+		if (*((__le16 *)&data[offset]) == cpu_to_le16(0))
+			offset += 2;
+
+		entries = (len - offset) /
+			sizeof(struct pda_rssi_cal_ext_entry);
+
+		if (len < offset ||
+		    (len - offset) % sizeof(struct pda_rssi_cal_ext_entry) ||
+		    entries == 0) {
+			wiphy_err(dev->wiphy, "invalid rssi database.\n");
+			goto err_data;
+		}
+	}
+
+	db_len = sizeof(*entry) * entries;
+	priv->rssi_db = kzalloc(db_len + sizeof(*priv->rssi_db), GFP_KERNEL);
+	if (!priv->rssi_db)
+		return -ENOMEM;
+
+	priv->rssi_db->offset = 0;
+	priv->rssi_db->entries = entries;
+	priv->rssi_db->entry_size = sizeof(*entry);
+	priv->rssi_db->len = db_len;
+
+	entry = (void *)((unsigned long)priv->rssi_db->data + priv->rssi_db->offset);
+	if (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) {
+		struct pda_rssi_cal_ext_entry *cal = (void *) &data[offset];
+
+		for (i = 0; i < entries; i++) {
+			entry[i].freq = le16_to_cpu(cal[i].freq);
+			entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
+			entry[i].add = (s16) le16_to_cpu(cal[i].add);
+		}
+	} else {
+		struct pda_rssi_cal_entry *cal = (void *) &data[offset];
+
+		for (i = 0; i < entries; i++) {
+			u16 freq = 0;
+			switch (i) {
+			case NL80211_BAND_2GHZ:
+				freq = 2437;
+				break;
+			case NL80211_BAND_5GHZ:
+				freq = 5240;
+				break;
+			}
+
+			entry[i].freq = freq;
+			entry[i].mul = (s16) le16_to_cpu(cal[i].mul);
+			entry[i].add = (s16) le16_to_cpu(cal[i].add);
+		}
+	}
+
+	/* sort the list by channel frequency */
+	sort(entry, entries, sizeof(*entry), p54_compare_rssichan, NULL);
+	return 0;
+
+err_data:
+	wiphy_err(dev->wiphy,
+		  "rssi calibration data packing type:(%x) len:%d.\n",
+		  type, len);
+
+	print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len);
+
+	wiphy_err(dev->wiphy, "please report this issue.\n");
+	return -EINVAL;
+}
+
+struct p54_rssi_db_entry *p54_rssi_find(struct p54_common *priv, const u16 freq)
+{
+	struct p54_rssi_db_entry *entry;
+	int i, found = -1;
+
+	if (!priv->rssi_db)
+		return &p54_rssi_default;
+
+	entry = (void *)(priv->rssi_db->data + priv->rssi_db->offset);
+	for (i = 0; i < priv->rssi_db->entries; i++) {
+		if (!same_band(freq, entry[i].freq))
+			continue;
+
+		if (found == -1) {
+			found = i;
+			continue;
+		}
+
+		/* nearest match */
+		if (abs(freq - entry[i].freq) <
+		    abs(freq - entry[found].freq)) {
+			found = i;
+			continue;
+		} else {
+			break;
+		}
+	}
+
+	return found < 0 ? &p54_rssi_default : &entry[found];
+}
+
+static void p54_parse_default_country(struct ieee80211_hw *dev,
+				      void *data, int len)
+{
+	struct pda_country *country;
+
+	if (len != sizeof(*country)) {
+		wiphy_err(dev->wiphy,
+			  "found possible invalid default country eeprom entry. (entry size: %d)\n",
+			  len);
+
+		print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
+				     data, len);
+
+		wiphy_err(dev->wiphy, "please report this issue.\n");
+		return;
+	}
+
+	country = (struct pda_country *) data;
+	if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
+		regulatory_hint(dev->wiphy, country->alpha2);
+	else {
+		/* TODO:
+		 * write a shared/common function that converts
+		 * "Regulatory domain codes" (802.11-2007 14.8.2.2)
+		 * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
+		 */
+	}
+}
+
+static int p54_convert_output_limits(struct ieee80211_hw *dev,
+				     u8 *data, size_t len)
+{
+	struct p54_common *priv = dev->priv;
+
+	if (len < 2)
+		return -EINVAL;
+
+	if (data[0] != 0) {
+		wiphy_err(dev->wiphy, "unknown output power db revision:%x\n",
+			  data[0]);
+		return -EINVAL;
+	}
+
+	if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
+		return -EINVAL;
+
+	priv->output_limit = kmalloc(data[1] *
+		sizeof(struct pda_channel_output_limit) +
+		sizeof(*priv->output_limit), GFP_KERNEL);
+
+	if (!priv->output_limit)
+		return -ENOMEM;
+
+	priv->output_limit->offset = 0;
+	priv->output_limit->entries = data[1];
+	priv->output_limit->entry_size =
+		sizeof(struct pda_channel_output_limit);
+	priv->output_limit->len = priv->output_limit->entry_size *
+				  priv->output_limit->entries +
+				  priv->output_limit->offset;
+
+	memcpy(priv->output_limit->data, &data[2],
+	       data[1] * sizeof(struct pda_channel_output_limit));
+
+	return 0;
+}
+
+static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
+					       size_t total_len)
+{
+	struct p54_cal_database *dst;
+	size_t payload_len, entries, entry_size, offset;
+
+	payload_len = le16_to_cpu(src->len);
+	entries = le16_to_cpu(src->entries);
+	entry_size = le16_to_cpu(src->entry_size);
+	offset = le16_to_cpu(src->offset);
+	if (((entries * entry_size + offset) != payload_len) ||
+	     (payload_len + sizeof(*src) != total_len))
+		return NULL;
+
+	dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
+	if (!dst)
+		return NULL;
+
+	dst->entries = entries;
+	dst->entry_size = entry_size;
+	dst->offset = offset;
+	dst->len = payload_len;
+
+	memcpy(dst->data, src->data, payload_len);
+	return dst;
+}
+
+int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
+{
+	struct p54_common *priv = dev->priv;
+	struct eeprom_pda_wrap *wrap;
+	struct pda_entry *entry;
+	unsigned int data_len, entry_len;
+	void *tmp;
+	int err;
+	u8 *end = (u8 *)eeprom + len;
+	u16 synth = 0;
+	u16 crc16 = ~0;
+
+	wrap = (struct eeprom_pda_wrap *) eeprom;
+	entry = (void *)wrap->data + le16_to_cpu(wrap->len);
+
+	/* verify that at least the entry length/code fits */
+	while ((u8 *)entry <= end - sizeof(*entry)) {
+		entry_len = le16_to_cpu(entry->len);
+		data_len = ((entry_len - 1) << 1);
+
+		/* abort if entry exceeds whole structure */
+		if ((u8 *)entry + sizeof(*entry) + data_len > end)
+			break;
+
+		switch (le16_to_cpu(entry->code)) {
+		case PDR_MAC_ADDRESS:
+			if (data_len != ETH_ALEN)
+				break;
+			SET_IEEE80211_PERM_ADDR(dev, entry->data);
+			break;
+		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
+			if (priv->output_limit)
+				break;
+			err = p54_convert_output_limits(dev, entry->data,
+							data_len);
+			if (err)
+				goto err;
+			break;
+		case PDR_PRISM_PA_CAL_CURVE_DATA: {
+			struct pda_pa_curve_data *curve_data =
+				(struct pda_pa_curve_data *)entry->data;
+			if (data_len < sizeof(*curve_data)) {
+				err = -EINVAL;
+				goto err;
+			}
+
+			switch (curve_data->cal_method_rev) {
+			case 0:
+				err = p54_convert_rev0(dev, curve_data);
+				break;
+			case 1:
+				err = p54_convert_rev1(dev, curve_data);
+				break;
+			default:
+				wiphy_err(dev->wiphy,
+					  "unknown curve data revision %d\n",
+					  curve_data->cal_method_rev);
+				err = -ENODEV;
+				break;
+			}
+			if (err)
+				goto err;
+			}
+			break;
+		case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
+			priv->iq_autocal = kmemdup(entry->data, data_len,
+						   GFP_KERNEL);
+			if (!priv->iq_autocal) {
+				err = -ENOMEM;
+				goto err;
+			}
+
+			priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
+			break;
+		case PDR_DEFAULT_COUNTRY:
+			p54_parse_default_country(dev, entry->data, data_len);
+			break;
+		case PDR_INTERFACE_LIST:
+			tmp = entry->data;
+			while ((u8 *)tmp < entry->data + data_len) {
+				struct exp_if *exp_if = tmp;
+				if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
+					synth = le16_to_cpu(exp_if->variant);
+				tmp += sizeof(*exp_if);
+			}
+			break;
+		case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
+			if (data_len < 2)
+				break;
+			priv->version = *(u8 *)(entry->data + 1);
+			break;
+		case PDR_RSSI_LINEAR_APPROXIMATION:
+		case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
+		case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
+			err = p54_parse_rssical(dev, entry->data, data_len,
+						le16_to_cpu(entry->code));
+			if (err)
+				goto err;
+			break;
+		case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
+			struct pda_custom_wrapper *pda = (void *) entry->data;
+			__le16 *src;
+			u16 *dst;
+			int i;
+
+			if (priv->rssi_db || data_len < sizeof(*pda))
+				break;
+
+			priv->rssi_db = p54_convert_db(pda, data_len);
+			if (!priv->rssi_db)
+				break;
+
+			src = (void *) priv->rssi_db->data;
+			dst = (void *) priv->rssi_db->data;
+
+			for (i = 0; i < priv->rssi_db->entries; i++)
+				*(dst++) = (s16) le16_to_cpu(*(src++));
+
+			}
+			break;
+		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
+			struct pda_custom_wrapper *pda = (void *) entry->data;
+			if (priv->output_limit || data_len < sizeof(*pda))
+				break;
+			priv->output_limit = p54_convert_db(pda, data_len);
+			}
+			break;
+		case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
+			struct pda_custom_wrapper *pda = (void *) entry->data;
+			if (priv->curve_data || data_len < sizeof(*pda))
+				break;
+			priv->curve_data = p54_convert_db(pda, data_len);
+			}
+			break;
+		case PDR_END:
+			crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
+			if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
+				wiphy_err(dev->wiphy, "eeprom failed checksum "
+					 "test!\n");
+				err = -ENOMSG;
+				goto err;
+			} else {
+				goto good_eeprom;
+			}
+			break;
+		default:
+			break;
+		}
+
+		crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
+		entry = (void *)entry + (entry_len + 1) * 2;
+	}
+
+	wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
+	err = -ENODATA;
+	goto err;
+
+good_eeprom:
+	if (!synth || !priv->iq_autocal || !priv->output_limit ||
+	    !priv->curve_data) {
+		wiphy_err(dev->wiphy,
+			  "not all required entries found in eeprom!\n");
+		err = -EINVAL;
+		goto err;
+	}
+
+	priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
+
+	err = p54_generate_channel_lists(dev);
+	if (err)
+		goto err;
+
+	if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
+		p54_init_xbow_synth(priv);
+	if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
+		dev->wiphy->bands[NL80211_BAND_2GHZ] =
+			priv->band_table[NL80211_BAND_2GHZ];
+	if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
+		dev->wiphy->bands[NL80211_BAND_5GHZ] =
+			priv->band_table[NL80211_BAND_5GHZ];
+	if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
+		priv->rx_diversity_mask = 3;
+	if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
+		priv->tx_diversity_mask = 3;
+
+	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
+		u8 perm_addr[ETH_ALEN];
+
+		wiphy_warn(dev->wiphy,
+			   "Invalid hwaddr! Using randomly generated MAC addr\n");
+		eth_random_addr(perm_addr);
+		SET_IEEE80211_PERM_ADDR(dev, perm_addr);
+	}
+
+	priv->cur_rssi = &p54_rssi_default;
+
+	wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
+		   dev->wiphy->perm_addr, priv->version,
+		   p54_rf_chips[priv->rxhw]);
+
+	return 0;
+
+err:
+	kfree(priv->iq_autocal);
+	kfree(priv->output_limit);
+	kfree(priv->curve_data);
+	kfree(priv->rssi_db);
+	kfree(priv->survey);
+	priv->iq_autocal = NULL;
+	priv->output_limit = NULL;
+	priv->curve_data = NULL;
+	priv->rssi_db = NULL;
+	priv->survey = NULL;
+
+	wiphy_err(dev->wiphy, "eeprom parse failed!\n");
+	return err;
+}
+EXPORT_SYMBOL_GPL(p54_parse_eeprom);
+
+int p54_read_eeprom(struct ieee80211_hw *dev)
+{
+	struct p54_common *priv = dev->priv;
+	size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
+	int ret = -ENOMEM;
+	void *eeprom;
+
+	maxblocksize = EEPROM_READBACK_LEN;
+	if (priv->fw_var >= 0x509)
+		maxblocksize -= 0xc;
+	else
+		maxblocksize -= 0x4;
+
+	eeprom = kzalloc(eeprom_size, GFP_KERNEL);
+	if (unlikely(!eeprom))
+		goto free;
+
+	while (eeprom_size) {
+		blocksize = min(eeprom_size, maxblocksize);
+		ret = p54_download_eeprom(priv, eeprom + offset,
+					  offset, blocksize);
+		if (unlikely(ret))
+			goto free;
+
+		offset += blocksize;
+		eeprom_size -= blocksize;
+	}
+
+	ret = p54_parse_eeprom(dev, eeprom, offset);
+free:
+	kfree(eeprom);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(p54_read_eeprom);