/****************************************************************************** * * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * 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. * * Contact Information: * Intel Linux Wireless <ilw@linux.intel.com> * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/delay.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/wireless.h> #include <net/mac80211.h> #include "iwl-eeprom.h" #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" #include "iwl-spectrum.h" #define BEACON_TIME_MASK_LOW 0x00FFFFFF #define BEACON_TIME_MASK_HIGH 0xFF000000 #define TIME_UNIT 1024 /* * extended beacon time format * time in usec will be changed into a 32-bit value in 8:24 format * the high 1 byte is the beacon counts * the lower 3 bytes is the time in usec within one beacon interval */ /* TOOD: was used in sysfs debug interface need to add to mac */ #if 0 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval) { u32 quot; u32 rem; u32 interval = beacon_interval * 1024; if (!interval || !usec) return 0; quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24); rem = (usec % interval) & BEACON_TIME_MASK_LOW; return (quot << 24) + rem; } /* base is usually what we get from ucode with each received frame, * the same as HW timer counter counting down */ static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval) { u32 base_low = base & BEACON_TIME_MASK_LOW; u32 addon_low = addon & BEACON_TIME_MASK_LOW; u32 interval = beacon_interval * TIME_UNIT; u32 res = (base & BEACON_TIME_MASK_HIGH) + (addon & BEACON_TIME_MASK_HIGH); if (base_low > addon_low) res += base_low - addon_low; else if (base_low < addon_low) { res += interval + base_low - addon_low; res += (1 << 24); } else res += (1 << 24); return cpu_to_le32(res); } static int iwl_get_measurement(struct iwl_priv *priv, struct ieee80211_measurement_params *params, u8 type) { struct iwl4965_spectrum_cmd spectrum; struct iwl_rx_packet *res; struct iwl_host_cmd cmd = { .id = REPLY_SPECTRUM_MEASUREMENT_CMD, .data = (void *)&spectrum, .meta.flags = CMD_WANT_SKB, }; u32 add_time = le64_to_cpu(params->start_time); int rc; int spectrum_resp_status; int duration = le16_to_cpu(params->duration); if (iwl_is_associated(priv)) add_time = iwl_usecs_to_beacons( le64_to_cpu(params->start_time) - priv->last_tsf, le16_to_cpu(priv->rxon_timing.beacon_interval)); memset(&spectrum, 0, sizeof(spectrum)); spectrum.channel_count = cpu_to_le16(1); spectrum.flags = RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK; spectrum.filter_flags = MEASUREMENT_FILTER_FLAG; cmd.len = sizeof(spectrum); spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len)); if (iwl_is_associated(priv)) spectrum.start_time = iwl_add_beacon_time(priv->last_beacon_time, add_time, le16_to_cpu(priv->rxon_timing.beacon_interval)); else spectrum.start_time = 0; spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT); spectrum.channels[0].channel = params->channel; spectrum.channels[0].type = type; if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK) spectrum.flags |= RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK; rc = iwl_send_cmd_sync(priv, &cmd); if (rc) return rc; res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n"); rc = -EIO; } spectrum_resp_status = le16_to_cpu(res->u.spectrum.status); switch (spectrum_resp_status) { case 0: /* Command will be handled */ if (res->u.spectrum.id != 0xff) { IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n", res->u.spectrum.id); priv->measurement_status &= ~MEASUREMENT_READY; } priv->measurement_status |= MEASUREMENT_ACTIVE; rc = 0; break; case 1: /* Command will not be handled */ rc = -EAGAIN; break; } dev_kfree_skb_any(cmd.meta.u.skb); return rc; } #endif static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif); if (!report->state) { IWL_DEBUG_11H(priv, "Spectrum Measure Notification: Start\n"); return; } memcpy(&priv->measure_report, report, sizeof(*report)); priv->measurement_status |= MEASUREMENT_READY; } void iwl_setup_spectrum_handlers(struct iwl_priv *priv) { priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl_rx_spectrum_measure_notif; } EXPORT_SYMBOL(iwl_setup_spectrum_handlers);