drivers/net/wireless/p54/eeprom.c: Return -ENOMEM on memory allocation failure

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / p54 / eeprom.c

/*
 * 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/init.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/sort.h>
#include <linux/slab.h>

#include <net/mac80211.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, },
};

#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;
        enum ieee80211_band band;
};

struct p54_channel_list {
        struct p54_channel_entry *channels;
        size_t entries;
        size_t max_entries;
        size_t band_channel_num[IEEE80211_NUM_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 IEEE80211_BAND_2GHZ;

        if ((freq >= 4920) && (freq <= 5825))
                return IEEE80211_BAND_5GHZ;

        return -1;
}

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->index - b->index;
}

static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
                                  struct ieee80211_supported_band *band_entry,
                                  enum ieee80211_band band)
{
        /* TODO: generate rate array dynamically */

        switch (band) {
        case IEEE80211_BAND_2GHZ:
                band_entry->bitrates = p54_bgrates;
                band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
                break;
        case IEEE80211_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,
                             enum ieee80211_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 = kzalloc(sizeof(struct ieee80211_channel) *
                                list->band_channel_num[band], 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++) {

                if (list->channels[i].band != band)
                        continue;

                if (list->channels[i].data != CHAN_HAS_ALL) {
                        printk(KERN_ERR "%s:%s%s%s is/are missing for "
                                        "channel:%d [%d MHz].\n",
                               wiphy_name(dev->wiphy),
                               (list->channels[i].data & CHAN_HAS_CAL ? "" :
                                " [iqauto calibration data]"),
                               (list->channels[i].data & CHAN_HAS_LIMIT ? "" :
                                " [output power limits]"),
                               (list->channels[i].data & CHAN_HAS_CURVE ? "" :
                                " [curve data]"),
                               list->channels[i].index, list->channels[i].freq);
                        continue;
                }

                tmp->channels[j].band = list->channels[i].band;
                tmp->channels[j].center_freq = list->channels[i].freq;
                j++;
        }

        if (j == 0) {
                printk(KERN_ERR "%s: Disabling totally damaged %s band.\n",
                       wiphy_name(dev->wiphy), (band == IEEE80211_BAND_2GHZ) ?
                       "2 GHz" : "5 GHz");

                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 void p54_update_channel_param(struct p54_channel_list *list,
                                     u16 freq, u16 data)
{
        int band, i;

        /*
         * 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) {
                        list->channels[i].data |= data;
                        break;
                }
        }

        if ((i < 0) && (list->entries < list->max_entries)) {
                /* entry does not exist yet. Initialize a new one. */
                band = p54_get_band_from_freq(freq);

                /*
                 * filter out frequencies which don't belong into
                 * any supported band.
                 */
                if (band < 0)
                        return ;

                i = list->entries++;
                list->band_channel_num[band]++;

                list->channels[i].freq = freq;
                list->channels[i].data = data;
                list->channels[i].band = band;
                list->channels[i].index = ieee80211_frequency_to_channel(freq);
                /* TODO: parse output_limit and fill max_power */
        }
}

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, 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))
                printk(KERN_ERR "%s: Unsupported or damaged EEPROM detected. "
                                "You may not be able to use all channels.\n",
                                wiphy_name(dev->wiphy));

        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;
        }

        list->max_entries = max_channel_num;
        list->channels = kzalloc(sizeof(struct p54_channel_entry) *
                                 max_channel_num, 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) {
                        freq = le16_to_cpup((__le16 *) (i *
                                            priv->output_limit->entry_size +
                                            priv->output_limit->offset +
                                            priv->output_limit->data));

                        p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
                }

                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 list by the channel index */
        sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
             p54_compare_channels, NULL);

        for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
                if (p54_generate_band(dev, list, i) == 0)
                        j++;
        }
        if (j == 0) {
                /* no useable band available. */
                ret = -EINVAL;
        }

free:
        if (list) {
                kfree(list->channels);
                kfree(list);
        }

        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 void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
                             u16 type)
{
        struct p54_common *priv = dev->priv;
        int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
        int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
        int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
        int i;

        if (len != (entry_size * num_entries)) {
                printk(KERN_ERR "%s: unknown rssi calibration data packing "
                                 " type:(%x) len:%d.\n",
                       wiphy_name(dev->wiphy), type, len);

                print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
                                     data, len);

                printk(KERN_ERR "%s: please report this issue.\n",
                        wiphy_name(dev->wiphy));
                return;
        }

        for (i = 0; i < num_entries; i++) {
                struct pda_rssi_cal_entry *cal = data +
                                                 (offset + i * entry_size);
                priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
                priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
        }
}

static void p54_parse_default_country(struct ieee80211_hw *dev,
                                      void *data, int len)
{
        struct pda_country *country;

        if (len != sizeof(*country)) {
                printk(KERN_ERR "%s: found possible invalid default country "
                                "eeprom entry. (entry size: %d)\n",
                       wiphy_name(dev->wiphy), len);

                print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
                                     data, len);

                printk(KERN_ERR "%s: please report this issue.\n",
                        wiphy_name(dev->wiphy));
                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) {
                printk(KERN_ERR "%s: unknown output power db revision:%x\n",
                       wiphy_name(dev->wiphy), 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;

        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:
                                printk(KERN_ERR "%s: unknown curve data "
                                                "revision %d\n",
                                                wiphy_name(dev->wiphy),
                                                curve_data->cal_method_rev);
                                err = -ENODEV;
                                break;
                        }
                        if (err)
                                goto err;
                        }
                        break;
                case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
                        priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
                        if (!priv->iq_autocal) {
                                err = -ENOMEM;
                                goto err;
                        }

                        memcpy(priv->iq_autocal, entry->data, data_len);
                        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:
                        p54_parse_rssical(dev, entry->data, data_len,
                                          le16_to_cpu(entry->code));
                        break;
                case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOM: {
                        __le16 *src = (void *) entry->data;
                        s16 *dst = (void *) &priv->rssical_db;
                        int i;

                        if (data_len != sizeof(priv->rssical_db)) {
                                err = -EINVAL;
                                goto err;
                        }
                        for (i = 0; i < sizeof(priv->rssical_db) /
                                        sizeof(*src); 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:
                        /* make it overrun */
                        entry_len = len;
                        break;
                default:
                        break;
                }

                entry = (void *)entry + (entry_len + 1)*2;
        }

        if (!synth || !priv->iq_autocal || !priv->output_limit ||
            !priv->curve_data) {
                printk(KERN_ERR "%s: not all required entries found in eeprom!\n",
                        wiphy_name(dev->wiphy));
                err = -EINVAL;
                goto err;
        }

        err = p54_generate_channel_lists(dev);
        if (err)
                goto err;

        priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
        if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
                p54_init_xbow_synth(priv);
        if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
                dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
                        priv->band_table[IEEE80211_BAND_2GHZ];
        if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
                dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
                        priv->band_table[IEEE80211_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];

                printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
                        wiphy_name(dev->wiphy));
                random_ether_addr(perm_addr);
                SET_IEEE80211_PERM_ADDR(dev, perm_addr);
        }

        printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
                wiphy_name(dev->wiphy), 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);
        priv->iq_autocal = NULL;
        priv->output_limit = NULL;
        priv->curve_data = NULL;

        printk(KERN_ERR "%s: eeprom parse failed!\n",
                wiphy_name(dev->wiphy));
        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, (void *) (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);