Dmitry Shmidt | da65eba | 2010-05-19 18:53:11 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Misc utility routines used by kernel or app-level. |
| 3 | * Contents are wifi-specific, used by any kernel or app-level |
| 4 | * software that might want wifi things as it grows. |
| 5 | * |
| 6 | * Copyright (C) 1999-2010, Broadcom Corporation |
| 7 | * |
| 8 | * Unless you and Broadcom execute a separate written software license |
| 9 | * agreement governing use of this software, this software is licensed to you |
| 10 | * under the terms of the GNU General Public License version 2 (the "GPL"), |
| 11 | * available at http://www.broadcom.com/licenses/GPLv2.php, with the |
| 12 | * following added to such license: |
| 13 | * |
| 14 | * As a special exception, the copyright holders of this software give you |
| 15 | * permission to link this software with independent modules, and to copy and |
| 16 | * distribute the resulting executable under terms of your choice, provided that |
| 17 | * you also meet, for each linked independent module, the terms and conditions of |
| 18 | * the license of that module. An independent module is a module which is not |
| 19 | * derived from this software. The special exception does not apply to any |
| 20 | * modifications of the software. |
| 21 | * |
| 22 | * Notwithstanding the above, under no circumstances may you combine this |
| 23 | * software in any way with any other Broadcom software provided under a license |
| 24 | * other than the GPL, without Broadcom's express prior written consent. |
| 25 | * $Id: bcmwifi.c,v 1.18.24.2.4.1 2009/09/25 00:32:01 Exp $ |
| 26 | */ |
| 27 | |
| 28 | |
| 29 | #include <typedefs.h> |
| 30 | |
| 31 | #ifdef BCMDRIVER |
| 32 | #include <osl.h> |
| 33 | #include <bcmutils.h> |
| 34 | #define strtoul(nptr, endptr, base) bcm_strtoul((nptr), (endptr), (base)) |
| 35 | #define tolower(c) (bcm_isupper((c)) ? ((c) + 'a' - 'A') : (c)) |
| 36 | #else |
| 37 | #include <stdio.h> |
| 38 | #include <stdlib.h> |
| 39 | #include <ctype.h> |
| 40 | #endif |
| 41 | #include <bcmwifi.h> |
| 42 | |
| 43 | #if defined(WIN32) && (defined(BCMDLL) || defined(WLMDLL)) |
| 44 | #include <bcmstdlib.h> |
| 45 | #endif |
| 46 | |
| 47 | |
| 48 | |
| 49 | |
| 50 | |
| 51 | char * |
| 52 | wf_chspec_ntoa(chanspec_t chspec, char *buf) |
| 53 | { |
| 54 | const char *band, *bw, *sb; |
| 55 | uint channel; |
| 56 | |
| 57 | band = ""; |
| 58 | bw = ""; |
| 59 | sb = ""; |
| 60 | channel = CHSPEC_CHANNEL(chspec); |
| 61 | |
| 62 | if ((CHSPEC_IS2G(chspec) && channel > CH_MAX_2G_CHANNEL) || |
| 63 | (CHSPEC_IS5G(chspec) && channel <= CH_MAX_2G_CHANNEL)) |
| 64 | band = (CHSPEC_IS2G(chspec)) ? "b" : "a"; |
| 65 | if (CHSPEC_IS40(chspec)) { |
| 66 | if (CHSPEC_SB_UPPER(chspec)) { |
| 67 | sb = "u"; |
| 68 | channel += CH_10MHZ_APART; |
| 69 | } else { |
| 70 | sb = "l"; |
| 71 | channel -= CH_10MHZ_APART; |
| 72 | } |
| 73 | } else if (CHSPEC_IS10(chspec)) { |
| 74 | bw = "n"; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | snprintf(buf, 6, "%d%s%s%s", channel, band, bw, sb); |
| 79 | return (buf); |
| 80 | } |
| 81 | |
| 82 | |
| 83 | chanspec_t |
| 84 | wf_chspec_aton(char *a) |
| 85 | { |
| 86 | char *endp = NULL; |
| 87 | uint channel, band, bw, ctl_sb; |
| 88 | char c; |
| 89 | |
| 90 | channel = strtoul(a, &endp, 10); |
| 91 | |
| 92 | |
| 93 | if (endp == a) |
| 94 | return 0; |
| 95 | |
| 96 | if (channel > MAXCHANNEL) |
| 97 | return 0; |
| 98 | |
| 99 | band = ((channel <= CH_MAX_2G_CHANNEL) ? WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G); |
| 100 | bw = WL_CHANSPEC_BW_20; |
| 101 | ctl_sb = WL_CHANSPEC_CTL_SB_NONE; |
| 102 | |
| 103 | a = endp; |
| 104 | |
| 105 | c = tolower(a[0]); |
| 106 | if (c == '\0') |
| 107 | goto done; |
| 108 | |
| 109 | |
| 110 | if (c == 'a' || c == 'b') { |
| 111 | band = (c == 'a') ? WL_CHANSPEC_BAND_5G : WL_CHANSPEC_BAND_2G; |
| 112 | a++; |
| 113 | c = tolower(a[0]); |
| 114 | if (c == '\0') |
| 115 | goto done; |
| 116 | } |
| 117 | |
| 118 | |
| 119 | if (c == 'n') { |
| 120 | bw = WL_CHANSPEC_BW_10; |
| 121 | } else if (c == 'l') { |
| 122 | bw = WL_CHANSPEC_BW_40; |
| 123 | ctl_sb = WL_CHANSPEC_CTL_SB_LOWER; |
| 124 | |
| 125 | if (channel <= (MAXCHANNEL - CH_20MHZ_APART)) |
| 126 | channel += CH_10MHZ_APART; |
| 127 | else |
| 128 | return 0; |
| 129 | } else if (c == 'u') { |
| 130 | bw = WL_CHANSPEC_BW_40; |
| 131 | ctl_sb = WL_CHANSPEC_CTL_SB_UPPER; |
| 132 | |
| 133 | if (channel > CH_20MHZ_APART) |
| 134 | channel -= CH_10MHZ_APART; |
| 135 | else |
| 136 | return 0; |
| 137 | } else { |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | done: |
| 142 | return (channel | band | bw | ctl_sb); |
| 143 | } |
| 144 | |
| 145 | |
| 146 | int |
| 147 | wf_mhz2channel(uint freq, uint start_factor) |
| 148 | { |
| 149 | int ch = -1; |
| 150 | uint base; |
| 151 | int offset; |
| 152 | |
| 153 | |
| 154 | if (start_factor == 0) { |
| 155 | if (freq >= 2400 && freq <= 2500) |
| 156 | start_factor = WF_CHAN_FACTOR_2_4_G; |
| 157 | else if (freq >= 5000 && freq <= 6000) |
| 158 | start_factor = WF_CHAN_FACTOR_5_G; |
| 159 | } |
| 160 | |
| 161 | if (freq == 2484 && start_factor == WF_CHAN_FACTOR_2_4_G) |
| 162 | return 14; |
| 163 | |
| 164 | base = start_factor / 2; |
| 165 | |
| 166 | |
| 167 | if ((freq < base) || (freq > base + 1000)) |
| 168 | return -1; |
| 169 | |
| 170 | offset = freq - base; |
| 171 | ch = offset / 5; |
| 172 | |
| 173 | |
| 174 | if (offset != (ch * 5)) |
| 175 | return -1; |
| 176 | |
| 177 | |
| 178 | if (start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 13)) |
| 179 | return -1; |
| 180 | |
| 181 | return ch; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | int |
| 186 | wf_channel2mhz(uint ch, uint start_factor) |
| 187 | { |
| 188 | int freq; |
| 189 | |
| 190 | if ((start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 14)) || |
| 191 | (ch <= 200)) |
| 192 | freq = -1; |
| 193 | if ((start_factor == WF_CHAN_FACTOR_2_4_G) && (ch == 14)) |
| 194 | freq = 2484; |
| 195 | else |
| 196 | freq = ch * 5 + start_factor / 2; |
| 197 | |
| 198 | return freq; |
| 199 | } |