1 files changed, 553 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlegacy/iwl-eeprom.c b/drivers/net/wireless/iwlegacy/iwl-eeprom.c
new file mode 100644
index 00000000000..5bf3f49b74a
--- /dev/null
+++ b/drivers/net/wireless/iwlegacy/iwl-eeprom.c
@@ -0,0 +1,553 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+
+#include <net/mac80211.h>
+
+#include "iwl-commands.h"
+#include "iwl-dev.h"
+#include "iwl-core.h"
+#include "iwl-debug.h"
+#include "iwl-eeprom.h"
+#include "iwl-io.h"
+
+/************************** EEPROM BANDS ****************************
+ *
+ * The iwlegacy_eeprom_band definitions below provide the mapping from the
+ * EEPROM contents to the specific channel number supported for each
+ * band.
+ *
+ * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
+ * definition below maps to physical channel 42 in the 5.2GHz spectrum.
+ * The specific geography and calibration information for that channel
+ * is contained in the eeprom map itself.
+ *
+ * During init, we copy the eeprom information and channel map
+ * information into priv->channel_info_24/52 and priv->channel_map_24/52
+ *
+ * channel_map_24/52 provides the index in the channel_info array for a
+ * given channel.  We have to have two separate maps as there is channel
+ * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
+ * band_2
+ *
+ * A value of 0xff stored in the channel_map indicates that the channel
+ * is not supported by the hardware at all.
+ *
+ * A value of 0xfe in the channel_map indicates that the channel is not
+ * valid for Tx with the current hardware.  This means that
+ * while the system can tune and receive on a given channel, it may not
+ * be able to associate or transmit any frames on that
+ * channel.  There is no corresponding channel information for that
+ * entry.
+ *
+ *********************************************************************/
+
+/* 2.4 GHz */
+const u8 iwlegacy_eeprom_band_1[14] = {
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+
+/* 5.2 GHz bands */
+static const u8 iwlegacy_eeprom_band_2[] = {    /* 4915-5080MHz */
+        183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
+};
+
+static const u8 iwlegacy_eeprom_band_3[] = {    /* 5170-5320MHz */
+        34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
+};
+
+static const u8 iwlegacy_eeprom_band_4[] = {    /* 5500-5700MHz */
+        100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
+};
+
+static const u8 iwlegacy_eeprom_band_5[] = {    /* 5725-5825MHz */
+        145, 149, 153, 157, 161, 165
+};
+
+static const u8 iwlegacy_eeprom_band_6[] = {       /* 2.4 ht40 channel */
+        1, 2, 3, 4, 5, 6, 7
+};
+
+static const u8 iwlegacy_eeprom_band_7[] = {       /* 5.2 ht40 channel */
+        36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
+};
+
+/******************************************************************************
+ *
+ * EEPROM related functions
+ *
+******************************************************************************/
+
+static int iwl_legacy_eeprom_verify_signature(struct iwl_priv *priv)
+{
+        u32 gp = iwl_read32(priv, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
+        int ret = 0;
+
+        IWL_DEBUG_EEPROM(priv, "EEPROM signature=0x%08x\n", gp);
+        switch (gp) {
+        case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
+        case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
+                break;
+        default:
+                IWL_ERR(priv, "bad EEPROM signature,"
+                        "EEPROM_GP=0x%08x\n", gp);
+                ret = -ENOENT;
+                break;
+        }
+        return ret;
+}
+
+const u8
+*iwl_legacy_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
+{
+        BUG_ON(offset >= priv->cfg->base_params->eeprom_size);
+        return &priv->eeprom[offset];
+}
+EXPORT_SYMBOL(iwl_legacy_eeprom_query_addr);
+
+u16 iwl_legacy_eeprom_query16(const struct iwl_priv *priv, size_t offset)
+{
+        if (!priv->eeprom)
+                return 0;
+        return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
+}
+EXPORT_SYMBOL(iwl_legacy_eeprom_query16);
+
+/**
+ * iwl_legacy_eeprom_init - read EEPROM contents
+ *
+ * Load the EEPROM contents from adapter into priv->eeprom
+ *
+ * NOTE:  This routine uses the non-debug IO access functions.
+ */
+int iwl_legacy_eeprom_init(struct iwl_priv *priv)
+{
+        __le16 *e;
+        u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
+        int sz;
+        int ret;
+        u16 addr;
+
+        /* allocate eeprom */
+        sz = priv->cfg->base_params->eeprom_size;
+        IWL_DEBUG_EEPROM(priv, "NVM size = %d\n", sz);
+        priv->eeprom = kzalloc(sz, GFP_KERNEL);
+        if (!priv->eeprom) {
+                ret = -ENOMEM;
+                goto alloc_err;
+        }
+        e = (__le16 *)priv->eeprom;
+
+        priv->cfg->ops->lib->apm_ops.init(priv);
+
+        ret = iwl_legacy_eeprom_verify_signature(priv);
+        if (ret < 0) {
+                IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
+                ret = -ENOENT;
+                goto err;
+        }
+
+        /* Make sure driver (instead of uCode) is allowed to read EEPROM */
+        ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
+        if (ret < 0) {
+                IWL_ERR(priv, "Failed to acquire EEPROM semaphore.\n");
+                ret = -ENOENT;
+                goto err;
+        }
+
+        /* eeprom is an array of 16bit values */
+        for (addr = 0; addr < sz; addr += sizeof(u16)) {
+                u32 r;
+
+                _iwl_legacy_write32(priv, CSR_EEPROM_REG,
+                             CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
+
+                ret = iwl_poll_bit(priv, CSR_EEPROM_REG,
+                                          CSR_EEPROM_REG_READ_VALID_MSK,
+                                          CSR_EEPROM_REG_READ_VALID_MSK,
+                                          IWL_EEPROM_ACCESS_TIMEOUT);
+                if (ret < 0) {
+                        IWL_ERR(priv, "Time out reading EEPROM[%d]\n",
+                                                        addr);
+                        goto done;
+                }
+                r = _iwl_legacy_read_direct32(priv, CSR_EEPROM_REG);
+                e[addr / 2] = cpu_to_le16(r >> 16);
+        }
+
+        IWL_DEBUG_EEPROM(priv, "NVM Type: %s, version: 0x%x\n",
+                       "EEPROM",
+                       iwl_legacy_eeprom_query16(priv, EEPROM_VERSION));
+
+        ret = 0;
+done:
+        priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
+
+err:
+        if (ret)
+                iwl_legacy_eeprom_free(priv);
+        /* Reset chip to save power until we load uCode during "up". */
+        iwl_legacy_apm_stop(priv);
+alloc_err:
+        return ret;
+}
+EXPORT_SYMBOL(iwl_legacy_eeprom_init);
+
+void iwl_legacy_eeprom_free(struct iwl_priv *priv)
+{
+        kfree(priv->eeprom);
+        priv->eeprom = NULL;
+}
+EXPORT_SYMBOL(iwl_legacy_eeprom_free);
+
+static void iwl_legacy_init_band_reference(const struct iwl_priv *priv,
+                        int eep_band, int *eeprom_ch_count,
+                        const struct iwl_eeprom_channel **eeprom_ch_info,
+                        const u8 **eeprom_ch_index)
+{
+        u32 offset = priv->cfg->ops->lib->
+                        eeprom_ops.regulatory_bands[eep_band - 1];
+        switch (eep_band) {
+        case 1:         /* 2.4GHz band */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_1);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_1;
+                break;
+        case 2:         /* 4.9GHz band */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_2);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_2;
+                break;
+        case 3:         /* 5.2GHz band */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_3);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_3;
+                break;
+        case 4:         /* 5.5GHz band */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_4);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_4;
+                break;
+        case 5:         /* 5.7GHz band */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_5);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_5;
+                break;
+        case 6:         /* 2.4GHz ht40 channels */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_6);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_6;
+                break;
+        case 7:         /* 5 GHz ht40 channels */
+                *eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_7);
+                *eeprom_ch_info = (struct iwl_eeprom_channel *)
+                                iwl_legacy_eeprom_query_addr(priv, offset);
+                *eeprom_ch_index = iwlegacy_eeprom_band_7;
+                break;
+        default:
+                BUG();
+        }
+}
+
+#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
+                            ? # x " " : "")
+/**
+ * iwl_legacy_mod_ht40_chan_info - Copy ht40 channel info into driver's priv.
+ *
+ * Does not set up a command, or touch hardware.
+ */
+static int iwl_legacy_mod_ht40_chan_info(struct iwl_priv *priv,
+                              enum ieee80211_band band, u16 channel,
+                              const struct iwl_eeprom_channel *eeprom_ch,
+                              u8 clear_ht40_extension_channel)
+{
+        struct iwl_channel_info *ch_info;
+
+        ch_info = (struct iwl_channel_info *)
+                        iwl_legacy_get_channel_info(priv, band, channel);
+
+        if (!iwl_legacy_is_channel_valid(ch_info))
+                return -1;
+
+        IWL_DEBUG_EEPROM(priv, "HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
+                        " Ad-Hoc %ssupported\n",
+                        ch_info->channel,
+                        iwl_legacy_is_channel_a_band(ch_info) ?
+                        "5.2" : "2.4",
+                        CHECK_AND_PRINT(IBSS),
+                        CHECK_AND_PRINT(ACTIVE),
+                        CHECK_AND_PRINT(RADAR),
+                        CHECK_AND_PRINT(WIDE),
+                        CHECK_AND_PRINT(DFS),
+                        eeprom_ch->flags,
+                        eeprom_ch->max_power_avg,
+                        ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
+                         && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
+                        "" : "not ");
+
+        ch_info->ht40_eeprom = *eeprom_ch;
+        ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
+        ch_info->ht40_flags = eeprom_ch->flags;
+        if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
+                ch_info->ht40_extension_channel &=
+                                        ~clear_ht40_extension_channel;
+
+        return 0;
+}
+
+#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
+                            ? # x " " : "")
+
+/**
+ * iwl_legacy_init_channel_map - Set up driver's info for all possible channels
+ */
+int iwl_legacy_init_channel_map(struct iwl_priv *priv)
+{
+        int eeprom_ch_count = 0;
+        const u8 *eeprom_ch_index = NULL;
+        const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
+        int band, ch;
+        struct iwl_channel_info *ch_info;
+
+        if (priv->channel_count) {
+                IWL_DEBUG_EEPROM(priv, "Channel map already initialized.\n");
+                return 0;
+        }
+
+        IWL_DEBUG_EEPROM(priv, "Initializing regulatory info from EEPROM\n");
+
+        priv->channel_count =
+            ARRAY_SIZE(iwlegacy_eeprom_band_1) +
+            ARRAY_SIZE(iwlegacy_eeprom_band_2) +
+            ARRAY_SIZE(iwlegacy_eeprom_band_3) +
+            ARRAY_SIZE(iwlegacy_eeprom_band_4) +
+            ARRAY_SIZE(iwlegacy_eeprom_band_5);
+
+        IWL_DEBUG_EEPROM(priv, "Parsing data for %d channels.\n",
+                        priv->channel_count);
+
+        priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
+                                     priv->channel_count, GFP_KERNEL);
+        if (!priv->channel_info) {
+                IWL_ERR(priv, "Could not allocate channel_info\n");
+                priv->channel_count = 0;
+                return -ENOMEM;
+        }
+
+        ch_info = priv->channel_info;
+
+        /* Loop through the 5 EEPROM bands adding them in order to the
+         * channel map we maintain (that contains additional information than
+         * what just in the EEPROM) */
+        for (band = 1; band <= 5; band++) {
+
+                iwl_legacy_init_band_reference(priv, band, &eeprom_ch_count,
+                                        &eeprom_ch_info, &eeprom_ch_index);
+
+                /* Loop through each band adding each of the channels */
+                for (ch = 0; ch < eeprom_ch_count; ch++) {
+                        ch_info->channel = eeprom_ch_index[ch];
+                        ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
+                            IEEE80211_BAND_5GHZ;
+
+                        /* permanently store EEPROM's channel regulatory flags
+                         *   and max power in channel info database. */
+                        ch_info->eeprom = eeprom_ch_info[ch];
+
+                        /* Copy the run-time flags so they are there even on
+                         * invalid channels */
+                        ch_info->flags = eeprom_ch_info[ch].flags;
+                        /* First write that ht40 is not enabled, and then enable
+                         * one by one */
+                        ch_info->ht40_extension_channel =
+                                        IEEE80211_CHAN_NO_HT40;
+
+                        if (!(iwl_legacy_is_channel_valid(ch_info))) {
+                                IWL_DEBUG_EEPROM(priv,
+                                               "Ch. %d Flags %x [%sGHz] - "
+                                               "No traffic\n",
+                                               ch_info->channel,
+                                               ch_info->flags,
+                                               iwl_legacy_is_channel_a_band(ch_info) ?
+                                               "5.2" : "2.4");
+                                ch_info++;
+                                continue;
+                        }
+
+                        /* Initialize regulatory-based run-time data */
+                        ch_info->max_power_avg = ch_info->curr_txpow =
+                            eeprom_ch_info[ch].max_power_avg;
+                        ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
+                        ch_info->min_power = 0;
+
+                        IWL_DEBUG_EEPROM(priv, "Ch. %d [%sGHz] "
+                                       "%s%s%s%s%s%s(0x%02x %ddBm):"
+                                       " Ad-Hoc %ssupported\n",
+                                       ch_info->channel,
+                                       iwl_legacy_is_channel_a_band(ch_info) ?
+                                       "5.2" : "2.4",
+                                       CHECK_AND_PRINT_I(VALID),
+                                       CHECK_AND_PRINT_I(IBSS),
+                                       CHECK_AND_PRINT_I(ACTIVE),
+                                       CHECK_AND_PRINT_I(RADAR),
+                                       CHECK_AND_PRINT_I(WIDE),
+                                       CHECK_AND_PRINT_I(DFS),
+                                       eeprom_ch_info[ch].flags,
+                                       eeprom_ch_info[ch].max_power_avg,
+                                       ((eeprom_ch_info[ch].
+                                         flags & EEPROM_CHANNEL_IBSS)
+                                        && !(eeprom_ch_info[ch].
+                                             flags & EEPROM_CHANNEL_RADAR))
+                                       ? "" : "not ");
+
+                        ch_info++;
+                }
+        }
+
+        /* Check if we do have HT40 channels */
+        if (priv->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
+            EEPROM_REGULATORY_BAND_NO_HT40 &&
+            priv->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
+            EEPROM_REGULATORY_BAND_NO_HT40)
+                return 0;
+
+        /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
+        for (band = 6; band <= 7; band++) {
+                enum ieee80211_band ieeeband;
+
+                iwl_legacy_init_band_reference(priv, band, &eeprom_ch_count,
+                                        &eeprom_ch_info, &eeprom_ch_index);
+
+                /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
+                ieeeband =
+                        (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
+
+                /* Loop through each band adding each of the channels */
+                for (ch = 0; ch < eeprom_ch_count; ch++) {
+                        /* Set up driver's info for lower half */
+                        iwl_legacy_mod_ht40_chan_info(priv, ieeeband,
+                                                eeprom_ch_index[ch],
+                                                &eeprom_ch_info[ch],
+                                                IEEE80211_CHAN_NO_HT40PLUS);
+
+                        /* Set up driver's info for upper half */
+                        iwl_legacy_mod_ht40_chan_info(priv, ieeeband,
+                                                eeprom_ch_index[ch] + 4,
+                                                &eeprom_ch_info[ch],
+                                                IEEE80211_CHAN_NO_HT40MINUS);
+                }
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL(iwl_legacy_init_channel_map);
+
+/*
+ * iwl_legacy_free_channel_map - undo allocations in iwl_legacy_init_channel_map
+ */
+void iwl_legacy_free_channel_map(struct iwl_priv *priv)
+{
+        kfree(priv->channel_info);
+        priv->channel_count = 0;
+}
+EXPORT_SYMBOL(iwl_legacy_free_channel_map);
+
+/**
+ * iwl_legacy_get_channel_info - Find driver's private channel info
+ *
+ * Based on band and channel number.
+ */
+const struct
+iwl_channel_info *iwl_legacy_get_channel_info(const struct iwl_priv *priv,
+                                        enum ieee80211_band band, u16 channel)
+{
+        int i;
+
+        switch (band) {
+        case IEEE80211_BAND_5GHZ:
+                for (i = 14; i < priv->channel_count; i++) {
+                        if (priv->channel_info[i].channel == channel)
+                                return &priv->channel_info[i];
+                }
+                break;
+        case IEEE80211_BAND_2GHZ:
+                if (channel >= 1 && channel <= 14)
+                        return &priv->channel_info[channel - 1];
+                break;
+        default:
+                BUG();
+        }
+
+        return NULL;
+}
+EXPORT_SYMBOL(iwl_legacy_get_channel_info);