/****************************************************************************** * * 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 * 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 #include #include #include #include #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(); return; } } #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);