diff options
Diffstat (limited to 'drivers/staging/brcm80211/util/bcmwifi.c')
| -rw-r--r-- | drivers/staging/brcm80211/util/bcmwifi.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/drivers/staging/brcm80211/util/bcmwifi.c b/drivers/staging/brcm80211/util/bcmwifi.c deleted file mode 100644 index 955a3ab1a827..000000000000 --- a/drivers/staging/brcm80211/util/bcmwifi.c +++ /dev/null @@ -1,137 +0,0 @@ -/* - * Copyright (c) 2010 Broadcom Corporation - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY - * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION - * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN - * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -#include <linux/ctype.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <bcmdefs.h> -#include <bcmutils.h> -#include <bcmwifi.h> - -/* - * Verify the chanspec is using a legal set of parameters, i.e. that the - * chanspec specified a band, bw, ctl_sb and channel and that the - * combination could be legal given any set of circumstances. - * RETURNS: true is the chanspec is malformed, false if it looks good. - */ -bool bcm_chspec_malformed(chanspec_t chanspec) -{ - /* must be 2G or 5G band */ - if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec)) - return true; - /* must be 20 or 40 bandwidth */ - if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec)) - return true; - - /* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */ - if (CHSPEC_IS20(chanspec)) { - if (!CHSPEC_SB_NONE(chanspec)) - return true; - } else { - if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) - return true; - } - - return false; -} -EXPORT_SYMBOL(bcm_chspec_malformed); - -/* - * This function returns the channel number that control traffic is being sent on, for legacy - * channels this is just the channel number, for 40MHZ channels it is the upper or lowre 20MHZ - * sideband depending on the chanspec selected - */ -u8 bcm_chspec_ctlchan(chanspec_t chspec) -{ - u8 ctl_chan; - - /* Is there a sideband ? */ - if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) { - return CHSPEC_CHANNEL(chspec); - } else { - /* we only support 40MHZ with sidebands */ - /* chanspec channel holds the centre frequency, use that and the - * side band information to reconstruct the control channel number - */ - if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) { - /* control chan is the upper 20 MHZ SB of the 40MHZ channel */ - ctl_chan = UPPER_20_SB(CHSPEC_CHANNEL(chspec)); - } else { - /* control chan is the lower 20 MHZ SB of the 40MHZ channel */ - ctl_chan = LOWER_20_SB(CHSPEC_CHANNEL(chspec)); - } - } - - return ctl_chan; -} -EXPORT_SYMBOL(bcm_chspec_ctlchan); - -/* - * Return the channel number for a given frequency and base frequency. - * The returned channel number is relative to the given base frequency. - * If the given base frequency is zero, a base frequency of 5 GHz is assumed for - * frequencies from 5 - 6 GHz, and 2.407 GHz is assumed for 2.4 - 2.5 GHz. - * - * Frequency is specified in MHz. - * The base frequency is specified as (start_factor * 500 kHz). - * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for - * 2.4 GHz and 5 GHz bands. - * - * The returned channel will be in the range [1, 14] in the 2.4 GHz band - * and [0, 200] otherwise. - * -1 is returned if the start_factor is WF_CHAN_FACTOR_2_4_G and the - * frequency is not a 2.4 GHz channel, or if the frequency is not and even - * multiple of 5 MHz from the base frequency to the base plus 1 GHz. - * - * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2 - */ -int bcm_mhz2channel(uint freq, uint start_factor) -{ - int ch = -1; - uint base; - int offset; - - /* take the default channel start frequency */ - if (start_factor == 0) { - if (freq >= 2400 && freq <= 2500) - start_factor = WF_CHAN_FACTOR_2_4_G; - else if (freq >= 5000 && freq <= 6000) - start_factor = WF_CHAN_FACTOR_5_G; - } - - if (freq == 2484 && start_factor == WF_CHAN_FACTOR_2_4_G) - return 14; - - base = start_factor / 2; - - /* check that the frequency is in 1GHz range of the base */ - if ((freq < base) || (freq > base + 1000)) - return -1; - - offset = freq - base; - ch = offset / 5; - - /* check that frequency is a 5MHz multiple from the base */ - if (offset != (ch * 5)) - return -1; - - /* restricted channel range check for 2.4G */ - if (start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 13)) - return -1; - - return ch; -} -EXPORT_SYMBOL(bcm_mhz2channel); - |