Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
Reinette Chatre | 01f8162 | 2009-01-08 10:20:02 -0800 | [diff] [blame] | 3 | * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved. |
Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 4 | * |
| 5 | * Portions of this file are derived from the ipw3945 project, as well |
| 6 | * as portions of the ieee80211 subsystem header files. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of version 2 of the GNU General Public License as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 15 | * more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along with |
| 18 | * this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 20 | * |
| 21 | * The full GNU General Public License is included in this distribution in the |
| 22 | * file called LICENSE. |
| 23 | * |
| 24 | * Contact Information: |
Winkler, Tomas | 759ef89 | 2008-12-09 11:28:58 -0800 | [diff] [blame] | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 27 | * |
| 28 | *****************************************************************************/ |
| 29 | |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/pci.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/skbuff.h> |
| 36 | #include <linux/netdevice.h> |
| 37 | #include <linux/wireless.h> |
| 38 | |
| 39 | #include <net/mac80211.h> |
| 40 | |
| 41 | #include "iwl-eeprom.h" |
| 42 | #include "iwl-dev.h" |
| 43 | #include "iwl-core.h" |
| 44 | #include "iwl-io.h" |
| 45 | #include "iwl-spectrum.h" |
| 46 | |
| 47 | #define BEACON_TIME_MASK_LOW 0x00FFFFFF |
| 48 | #define BEACON_TIME_MASK_HIGH 0xFF000000 |
| 49 | #define TIME_UNIT 1024 |
| 50 | |
| 51 | /* |
| 52 | * extended beacon time format |
| 53 | * time in usec will be changed into a 32-bit value in 8:24 format |
| 54 | * the high 1 byte is the beacon counts |
| 55 | * the lower 3 bytes is the time in usec within one beacon interval |
| 56 | */ |
| 57 | |
| 58 | /* TOOD: was used in sysfs debug interface need to add to mac */ |
| 59 | #if 0 |
| 60 | static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval) |
| 61 | { |
| 62 | u32 quot; |
| 63 | u32 rem; |
| 64 | u32 interval = beacon_interval * 1024; |
| 65 | |
| 66 | if (!interval || !usec) |
| 67 | return 0; |
| 68 | |
| 69 | quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24); |
| 70 | rem = (usec % interval) & BEACON_TIME_MASK_LOW; |
| 71 | |
| 72 | return (quot << 24) + rem; |
| 73 | } |
| 74 | |
| 75 | /* base is usually what we get from ucode with each received frame, |
| 76 | * the same as HW timer counter counting down |
| 77 | */ |
| 78 | |
| 79 | static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval) |
| 80 | { |
| 81 | u32 base_low = base & BEACON_TIME_MASK_LOW; |
| 82 | u32 addon_low = addon & BEACON_TIME_MASK_LOW; |
| 83 | u32 interval = beacon_interval * TIME_UNIT; |
| 84 | u32 res = (base & BEACON_TIME_MASK_HIGH) + |
| 85 | (addon & BEACON_TIME_MASK_HIGH); |
| 86 | |
| 87 | if (base_low > addon_low) |
| 88 | res += base_low - addon_low; |
| 89 | else if (base_low < addon_low) { |
| 90 | res += interval + base_low - addon_low; |
| 91 | res += (1 << 24); |
| 92 | } else |
| 93 | res += (1 << 24); |
| 94 | |
| 95 | return cpu_to_le32(res); |
| 96 | } |
| 97 | static int iwl_get_measurement(struct iwl_priv *priv, |
| 98 | struct ieee80211_measurement_params *params, |
| 99 | u8 type) |
| 100 | { |
| 101 | struct iwl4965_spectrum_cmd spectrum; |
| 102 | struct iwl_rx_packet *res; |
| 103 | struct iwl_host_cmd cmd = { |
| 104 | .id = REPLY_SPECTRUM_MEASUREMENT_CMD, |
| 105 | .data = (void *)&spectrum, |
| 106 | .meta.flags = CMD_WANT_SKB, |
| 107 | }; |
| 108 | u32 add_time = le64_to_cpu(params->start_time); |
| 109 | int rc; |
| 110 | int spectrum_resp_status; |
| 111 | int duration = le16_to_cpu(params->duration); |
| 112 | |
| 113 | if (iwl_is_associated(priv)) |
| 114 | add_time = |
| 115 | iwl_usecs_to_beacons( |
| 116 | le64_to_cpu(params->start_time) - priv->last_tsf, |
| 117 | le16_to_cpu(priv->rxon_timing.beacon_interval)); |
| 118 | |
| 119 | memset(&spectrum, 0, sizeof(spectrum)); |
| 120 | |
| 121 | spectrum.channel_count = cpu_to_le16(1); |
| 122 | spectrum.flags = |
| 123 | RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK; |
| 124 | spectrum.filter_flags = MEASUREMENT_FILTER_FLAG; |
| 125 | cmd.len = sizeof(spectrum); |
| 126 | spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len)); |
| 127 | |
| 128 | if (iwl_is_associated(priv)) |
| 129 | spectrum.start_time = |
| 130 | iwl_add_beacon_time(priv->last_beacon_time, |
| 131 | add_time, |
| 132 | le16_to_cpu(priv->rxon_timing.beacon_interval)); |
| 133 | else |
| 134 | spectrum.start_time = 0; |
| 135 | |
| 136 | spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT); |
| 137 | spectrum.channels[0].channel = params->channel; |
| 138 | spectrum.channels[0].type = type; |
| 139 | if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK) |
| 140 | spectrum.flags |= RXON_FLG_BAND_24G_MSK | |
| 141 | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK; |
| 142 | |
| 143 | rc = iwl_send_cmd_sync(priv, &cmd); |
| 144 | if (rc) |
| 145 | return rc; |
| 146 | |
| 147 | res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; |
| 148 | if (res->hdr.flags & IWL_CMD_FAILED_MSK) { |
Winkler, Tomas | 15b1687 | 2008-12-19 10:37:33 +0800 | [diff] [blame] | 149 | IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n"); |
Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 150 | rc = -EIO; |
| 151 | } |
| 152 | |
| 153 | spectrum_resp_status = le16_to_cpu(res->u.spectrum.status); |
| 154 | switch (spectrum_resp_status) { |
| 155 | case 0: /* Command will be handled */ |
| 156 | if (res->u.spectrum.id != 0xff) { |
Tomas Winkler | e162344 | 2009-01-27 14:27:56 -0800 | [diff] [blame] | 157 | IWL_DEBUG_INFO(priv, |
| 158 | "Replaced existing measurement: %d\n", |
| 159 | res->u.spectrum.id); |
Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 160 | priv->measurement_status &= ~MEASUREMENT_READY; |
| 161 | } |
| 162 | priv->measurement_status |= MEASUREMENT_ACTIVE; |
| 163 | rc = 0; |
| 164 | break; |
| 165 | |
| 166 | case 1: /* Command will not be handled */ |
| 167 | rc = -EAGAIN; |
| 168 | break; |
| 169 | } |
| 170 | |
| 171 | dev_kfree_skb_any(cmd.meta.u.skb); |
| 172 | |
| 173 | return rc; |
| 174 | } |
| 175 | #endif |
| 176 | |
| 177 | static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv, |
| 178 | struct iwl_rx_mem_buffer *rxb) |
| 179 | { |
| 180 | struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; |
Tomas Winkler | 2aa6ab8 | 2008-12-11 10:33:40 -0800 | [diff] [blame] | 181 | struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif); |
Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 182 | |
| 183 | if (!report->state) { |
Tomas Winkler | e162344 | 2009-01-27 14:27:56 -0800 | [diff] [blame] | 184 | IWL_DEBUG_11H(priv, |
Tomas Winkler | 21c339b | 2008-11-07 09:58:41 -0800 | [diff] [blame] | 185 | "Spectrum Measure Notification: Start\n"); |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | memcpy(&priv->measure_report, report, sizeof(*report)); |
| 190 | priv->measurement_status |= MEASUREMENT_READY; |
| 191 | } |
| 192 | |
| 193 | void iwl_setup_spectrum_handlers(struct iwl_priv *priv) |
| 194 | { |
| 195 | priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] = |
| 196 | iwl_rx_spectrum_measure_notif; |
| 197 | } |
| 198 | EXPORT_SYMBOL(iwl_setup_spectrum_handlers); |