diff options
Diffstat (limited to 'drivers/net/wireless/bcmdhd/src/wl/bcmwifi/src/bcmwifi_channels.c')
| -rw-r--r-- | drivers/net/wireless/bcmdhd/src/wl/bcmwifi/src/bcmwifi_channels.c | 901 |
1 files changed, 0 insertions, 901 deletions
diff --git a/drivers/net/wireless/bcmdhd/src/wl/bcmwifi/src/bcmwifi_channels.c b/drivers/net/wireless/bcmdhd/src/wl/bcmwifi/src/bcmwifi_channels.c deleted file mode 100644 index 629f0c9..0000000 --- a/drivers/net/wireless/bcmdhd/src/wl/bcmwifi/src/bcmwifi_channels.c +++ /dev/null @@ -1,901 +0,0 @@ -/* - * Misc utility routines used by kernel or app-level. - * Contents are wifi-specific, used by any kernel or app-level - * software that might want wifi things as it grows. - * - * Copyright (C) 1999-2011, Broadcom Corporation - * - * Unless you and Broadcom execute a separate written software license - * agreement governing use of this software, this software is licensed to you - * under the terms of the GNU General Public License version 2 (the "GPL"), - * available at http://www.broadcom.com/licenses/GPLv2.php, with the - * following added to such license: - * - * As a special exception, the copyright holders of this software give you - * permission to link this software with independent modules, and to copy and - * distribute the resulting executable under terms of your choice, provided that - * you also meet, for each linked independent module, the terms and conditions of - * the license of that module. An independent module is a module which is not - * derived from this software. The special exception does not apply to any - * modifications of the software. - * - * Notwithstanding the above, under no circumstances may you combine this - * software in any way with any other Broadcom software provided under a license - * other than the GPL, without Broadcom's express prior written consent. - * $Id: bcmwifi.c 300516 2011-12-04 17:39:44Z $ - */ - -#include <bcm_cfg.h> -#include <typedefs.h> - -#ifdef BCMDRIVER -#include <osl.h> -#include <bcmutils.h> -#define strtoul(nptr, endptr, base) bcm_strtoul((nptr), (endptr), (base)) -#define tolower(c) (bcm_isupper((c)) ? ((c) + 'a' - 'A') : (c)) -#else -#include <stdio.h> -#include <stdlib.h> -#include <ctype.h> -#ifndef ASSERT -#define ASSERT(exp) -#endif -#endif /* BCMDRIVER */ -#ifdef _bcmwifi_c_ -#include <bcmwifi.h> -#else -#include <bcmwifi_channels.h> -#endif - -#if defined(WIN32) && (defined(BCMDLL) || defined(WLMDLL)) -#include <bcmstdlib.h> -#endif - -#ifndef D11AC_IOTYPES -char * -wf_chspec_ntoa(chanspec_t chspec, char *buf) -{ - const char *band, *bw, *sb; - uint channel; - - band = ""; - bw = ""; - sb = ""; - channel = CHSPEC_CHANNEL(chspec); - - if ((CHSPEC_IS2G(chspec) && channel > CH_MAX_2G_CHANNEL) || - (CHSPEC_IS5G(chspec) && channel <= CH_MAX_2G_CHANNEL)) - band = (CHSPEC_IS2G(chspec)) ? "b" : "a"; - if (CHSPEC_IS40(chspec)) { - if (CHSPEC_SB_UPPER(chspec)) { - sb = "u"; - channel += CH_10MHZ_APART; - } else { - sb = "l"; - channel -= CH_10MHZ_APART; - } - } else if (CHSPEC_IS10(chspec)) { - bw = "n"; - } - - - snprintf(buf, 6, "%d%s%s%s", channel, band, bw, sb); - return (buf); -} - - -chanspec_t -wf_chspec_aton(const char *a) -{ - char *endp = NULL; - uint channel, band, bw, ctl_sb; - char c; - - channel = strtoul(a, &endp, 10); - - - if (endp == a) - return 0; - - if (channel > MAXCHANNEL) - return 0; - - band = ((channel <= CH_MAX_2G_CHANNEL) ? WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G); - bw = WL_CHANSPEC_BW_20; - ctl_sb = WL_CHANSPEC_CTL_SB_NONE; - - a = endp; - - c = tolower(a[0]); - if (c == '\0') - goto done; - - - if (c == 'a' || c == 'b') { - band = (c == 'a') ? WL_CHANSPEC_BAND_5G : WL_CHANSPEC_BAND_2G; - a++; - c = tolower(a[0]); - if (c == '\0') - goto done; - } - - - if (c == 'n') { - bw = WL_CHANSPEC_BW_10; - } else if (c == 'l') { - bw = WL_CHANSPEC_BW_40; - ctl_sb = WL_CHANSPEC_CTL_SB_LOWER; - - if (channel <= (MAXCHANNEL - CH_20MHZ_APART)) - channel += CH_10MHZ_APART; - else - return 0; - } else if (c == 'u') { - bw = WL_CHANSPEC_BW_40; - ctl_sb = WL_CHANSPEC_CTL_SB_UPPER; - - if (channel > CH_20MHZ_APART) - channel -= CH_10MHZ_APART; - else - return 0; - } else { - return 0; - } - -done: - return (channel | band | bw | ctl_sb); -} - - -bool -wf_chspec_malformed(chanspec_t chanspec) -{ - - if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec)) - return TRUE; - - if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec)) - return TRUE; - - - 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; -} - - -uint8 -wf_chspec_ctlchan(chanspec_t chspec) -{ - uint8 ctl_chan; - - - if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) { - return CHSPEC_CHANNEL(chspec); - } else { - - ASSERT(CHSPEC_BW(chspec) == WL_CHANSPEC_BW_40); - - if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) { - - ctl_chan = UPPER_20_SB(CHSPEC_CHANNEL(chspec)); - } else { - ASSERT(CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_LOWER); - - ctl_chan = LOWER_20_SB(CHSPEC_CHANNEL(chspec)); - } - } - - return ctl_chan; -} - -chanspec_t -wf_chspec_ctlchspec(chanspec_t chspec) -{ - chanspec_t ctl_chspec = 0; - uint8 channel; - - ASSERT(!wf_chspec_malformed(chspec)); - - - if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) { - return chspec; - } else { - if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) { - channel = UPPER_20_SB(CHSPEC_CHANNEL(chspec)); - } else { - channel = LOWER_20_SB(CHSPEC_CHANNEL(chspec)); - } - ctl_chspec = channel | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE; - ctl_chspec |= CHSPEC_BAND(chspec); - } - return ctl_chspec; -} - -#else - -static const char *wf_chspec_bw_str[] = -{ - "5", - "10", - "20", - "40", - "80", - "160", - "80+80", - "na" -}; - -static const uint8 wf_chspec_bw_mhz[] = -{5, 10, 20, 40, 80, 160, 160}; - -#define WF_NUM_BW \ - (sizeof(wf_chspec_bw_mhz)/sizeof(uint8)) - - -static const uint8 wf_5g_40m_chans[] = -{38, 46, 54, 62, 102, 110, 118, 126, 134, 142, 151, 159}; -#define WF_NUM_5G_40M_CHANS \ - (sizeof(wf_5g_40m_chans)/sizeof(uint8)) - - -static const uint8 wf_5g_80m_chans[] = -{42, 58, 106, 122, 138, 155}; -#define WF_NUM_5G_80M_CHANS \ - (sizeof(wf_5g_80m_chans)/sizeof(uint8)) - - -static const uint8 wf_5g_160m_chans[] = -{50, 114}; -#define WF_NUM_5G_160M_CHANS \ - (sizeof(wf_5g_160m_chans)/sizeof(uint8)) - -static uint -bw_chspec_to_mhz(chanspec_t chspec) -{ - uint bw; - - bw = (chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT; - return (bw >= WF_NUM_BW ? 0 : wf_chspec_bw_mhz[bw]); -} - - -static uint8 -center_chan_to_edge(uint bw) -{ - - return (uint8)(((bw - 20) / 2) / 5); -} - - -static uint8 -channel_low_edge(uint center_ch, uint bw) -{ - return (uint8)(center_ch - center_chan_to_edge(bw)); -} - - -static int -channel_to_sb(uint center_ch, uint ctl_ch, uint bw) -{ - uint lowest = channel_low_edge(center_ch, bw); - uint sb; - - if ((ctl_ch - lowest) % 4) { - - return -1; - } - - sb = ((ctl_ch - lowest) / 4); - - - if (sb >= (bw / 20)) { - - return -1; - } - - return sb; -} - - -static uint8 -channel_to_ctl_chan(uint center_ch, uint bw, uint sb) -{ - return (uint8)(channel_low_edge(center_ch, bw) + sb * 4); -} - - -static int -channel_80mhz_to_id(uint ch) -{ - uint i; - for (i = 0; i < WF_NUM_5G_80M_CHANS; i ++) { - if (ch == wf_5g_80m_chans[i]) - return i; - } - - return -1; -} - - -char * -wf_chspec_ntoa(chanspec_t chspec, char *buf) -{ - const char *band; - uint ctl_chan; - - if (wf_chspec_malformed(chspec)) - return NULL; - - band = ""; - - - if ((CHSPEC_IS2G(chspec) && CHSPEC_CHANNEL(chspec) > CH_MAX_2G_CHANNEL) || - (CHSPEC_IS5G(chspec) && CHSPEC_CHANNEL(chspec) <= CH_MAX_2G_CHANNEL)) - band = (CHSPEC_IS2G(chspec)) ? "2g" : "5g"; - - - ctl_chan = wf_chspec_ctlchan(chspec); - - - if (CHSPEC_IS20(chspec)) { - snprintf(buf, CHANSPEC_STR_LEN, "%s%d", band, ctl_chan); - } else if (!CHSPEC_IS8080(chspec)) { - const char *bw; - const char *sb = ""; - - bw = wf_chspec_bw_str[(chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT]; - -#ifdef CHANSPEC_NEW_40MHZ_FORMAT - - if (CHSPEC_IS40(chspec) && CHSPEC_IS2G(chspec)) { - sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l"; - } - - snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s%s", band, ctl_chan, bw, sb); -#else - - if (CHSPEC_IS40(chspec)) { - sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l"; - snprintf(buf, CHANSPEC_STR_LEN, "%s%d%s", band, ctl_chan, sb); - } else { - snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s", band, ctl_chan, bw); - } -#endif - - } else { - - uint chan1 = (chspec & WL_CHANSPEC_CHAN1_MASK) >> WL_CHANSPEC_CHAN1_SHIFT; - uint chan2 = (chspec & WL_CHANSPEC_CHAN2_MASK) >> WL_CHANSPEC_CHAN2_SHIFT; - - - chan1 = (chan1 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan1] : 0; - chan2 = (chan2 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan2] : 0; - - - snprintf(buf, CHANSPEC_STR_LEN, "%d/80+80/%d-%d", ctl_chan, chan1, chan2); - } - - return (buf); -} - -static int -read_uint(const char **p, unsigned int *num) -{ - unsigned long val; - char *endp = NULL; - - val = strtoul(*p, &endp, 10); - - if (endp == *p) - return 0; - - - *p = endp; - - *num = (unsigned int)val; - - return 1; -} - - -chanspec_t -wf_chspec_aton(const char *a) -{ - chanspec_t chspec; - uint chspec_ch, chspec_band, bw, chspec_bw, chspec_sb; - uint num, ctl_ch; - uint ch1, ch2; - char c, sb_ul = '\0'; - int i; - - bw = 20; - chspec_sb = 0; - chspec_ch = ch1 = ch2 = 0; - - - if (!read_uint(&a, &num)) - return 0; - - - c = tolower(a[0]); - if (c == 'g') { - a ++; - - - if (num == 2) - chspec_band = WL_CHANSPEC_BAND_2G; - else if (num == 5) - chspec_band = WL_CHANSPEC_BAND_5G; - else - return 0; - - - if (!read_uint(&a, &ctl_ch)) - return 0; - - c = tolower(a[0]); - } - else { - - ctl_ch = num; - chspec_band = ((ctl_ch <= CH_MAX_2G_CHANNEL) ? - WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G); - } - - if (c == '\0') { - - chspec_bw = WL_CHANSPEC_BW_20; - goto done_read; - } - - a ++; - - - if (c == 'u' || c == 'l') { - sb_ul = c; - chspec_bw = WL_CHANSPEC_BW_40; - goto done_read; - } - - - if (c != '/') - return 0; - - - if (!read_uint(&a, &bw)) - return 0; - - - if (bw == 20) { - chspec_bw = WL_CHANSPEC_BW_20; - } else if (bw == 40) { - chspec_bw = WL_CHANSPEC_BW_40; - } else if (bw == 80) { - chspec_bw = WL_CHANSPEC_BW_80; - } else if (bw == 160) { - chspec_bw = WL_CHANSPEC_BW_160; - } else { - return 0; - } - - c = tolower(a[0]); - - if (chspec_band == WL_CHANSPEC_BAND_2G && bw == 40) { - if (c == 'u' || c == 'l') { - a ++; - sb_ul = c; - goto done_read; - } - } - - if (c == '+') { - static const char *plus80 = "80/"; - - - chspec_bw = WL_CHANSPEC_BW_8080; - - a ++; - - - for (i = 0; i < 3; i++) { - if (*a++ != *plus80++) { - return 0; - } - } - - if (!read_uint(&a, &ch1)) - return 0; - - if (a[0] != '-') - return 0; - a ++; - - if (!read_uint(&a, &ch2)) - return 0; - } - -done_read: - - while (a[0] == ' ') { - a ++; - } - - if (a[0] != '\0') - return 0; - - if (sb_ul != '\0') { - if (sb_ul == 'l') { - chspec_ch = UPPER_20_SB(ctl_ch); - chspec_sb = WL_CHANSPEC_CTL_SB_LLL; - } else if (sb_ul == 'u') { - chspec_ch = LOWER_20_SB(ctl_ch); - chspec_sb = WL_CHANSPEC_CTL_SB_LLU; - } - } - - else if (chspec_bw == WL_CHANSPEC_BW_20) { - chspec_ch = ctl_ch; - chspec_sb = 0; - } - - else if (chspec_bw != WL_CHANSPEC_BW_8080) { - - const uint8 *center_ch = NULL; - int num_ch = 0; - int sb = -1; - - if (chspec_bw == WL_CHANSPEC_BW_40) { - center_ch = wf_5g_40m_chans; - num_ch = WF_NUM_5G_40M_CHANS; - } else if (chspec_bw == WL_CHANSPEC_BW_80) { - center_ch = wf_5g_80m_chans; - num_ch = WF_NUM_5G_80M_CHANS; - } else if (chspec_bw == WL_CHANSPEC_BW_160) { - center_ch = wf_5g_160m_chans; - num_ch = WF_NUM_5G_160M_CHANS; - } else { - return 0; - } - - for (i = 0; i < num_ch; i ++) { - sb = channel_to_sb(center_ch[i], ctl_ch, bw); - if (sb >= 0) { - chspec_ch = center_ch[i]; - chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT; - break; - } - } - - - if (sb < 0) { - return 0; - } - } - - else { - int ch1_id = 0, ch2_id = 0; - int sb; - - ch1_id = channel_80mhz_to_id(ch1); - ch2_id = channel_80mhz_to_id(ch2); - - - if (ch1 >= ch2 || ch1_id < 0 || ch2_id < 0) - return 0; - - chspec_ch = (((uint16)ch1_id << WL_CHANSPEC_CHAN1_SHIFT) | - ((uint16)ch2_id << WL_CHANSPEC_CHAN2_SHIFT)); - - sb = channel_to_sb(ch1, ctl_ch, bw); - if (sb < 0) { - - sb = channel_to_sb(ch2, ctl_ch, bw); - if (sb < 0) { - - return 0; - } - - sb += 4; - } - - chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT; - } - - chspec = (chspec_ch | chspec_band | chspec_bw | chspec_sb); - - if (wf_chspec_malformed(chspec)) - return 0; - - return chspec; -} - - -bool -wf_chspec_malformed(chanspec_t chanspec) -{ - uint chspec_bw = CHSPEC_BW(chanspec); - uint chspec_ch = CHSPEC_CHANNEL(chanspec); - - - if (CHSPEC_IS2G(chanspec)) { - - if (chspec_bw != WL_CHANSPEC_BW_20 && - chspec_bw != WL_CHANSPEC_BW_40) { - return TRUE; - } - } else if (CHSPEC_IS5G(chanspec)) { - if (chspec_bw == WL_CHANSPEC_BW_8080) { - uint ch1_id, ch2_id; - - - ch1_id = CHSPEC_CHAN1(chanspec); - ch2_id = CHSPEC_CHAN2(chanspec); - if (ch1_id >= WF_NUM_5G_80M_CHANS || ch2_id >= WF_NUM_5G_80M_CHANS) - return TRUE; - - - if (ch2_id <= ch1_id) - return TRUE; - } else if (chspec_bw == WL_CHANSPEC_BW_20 || chspec_bw == WL_CHANSPEC_BW_40 || - chspec_bw == WL_CHANSPEC_BW_80 || chspec_bw == WL_CHANSPEC_BW_160) { - - if (chspec_ch > MAXCHANNEL) { - return TRUE; - } - } else { - - return TRUE; - } - } else { - - return TRUE; - } - - - if (chspec_bw == WL_CHANSPEC_BW_20) { - if (CHSPEC_CTL_SB(chanspec) != WL_CHANSPEC_CTL_SB_LLL) - return TRUE; - } else if (chspec_bw == WL_CHANSPEC_BW_40) { - if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LLU) - return TRUE; - } else if (chspec_bw == WL_CHANSPEC_BW_80) { - if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LUU) - return TRUE; - } - - return FALSE; -} - - -bool -wf_chspec_valid(chanspec_t chanspec) -{ - uint chspec_bw = CHSPEC_BW(chanspec); - uint chspec_ch = CHSPEC_CHANNEL(chanspec); - - if (wf_chspec_malformed(chanspec)) - return FALSE; - - if (CHSPEC_IS2G(chanspec)) { - - if (chspec_bw == WL_CHANSPEC_BW_20) { - if (chspec_ch >= 1 && chspec_ch <= 14) - return TRUE; - } else if (chspec_bw == WL_CHANSPEC_BW_40) { - if (chspec_ch >= 3 && chspec_ch <= 11) - return TRUE; - } - } else if (CHSPEC_IS5G(chanspec)) { - if (chspec_bw == WL_CHANSPEC_BW_8080) { - uint16 ch1, ch2; - - ch1 = wf_5g_80m_chans[CHSPEC_CHAN1(chanspec)]; - ch2 = wf_5g_80m_chans[CHSPEC_CHAN2(chanspec)]; - - - if (ch2 > ch1 + CH_80MHZ_APART) - return TRUE; - } else { - const uint8 *center_ch; - uint num_ch, i; - - if (chspec_bw == WL_CHANSPEC_BW_20 || chspec_bw == WL_CHANSPEC_BW_40) { - center_ch = wf_5g_40m_chans; - num_ch = WF_NUM_5G_40M_CHANS; - } else if (chspec_bw == WL_CHANSPEC_BW_80) { - center_ch = wf_5g_80m_chans; - num_ch = WF_NUM_5G_80M_CHANS; - } else if (chspec_bw == WL_CHANSPEC_BW_160) { - center_ch = wf_5g_160m_chans; - num_ch = WF_NUM_5G_160M_CHANS; - } else { - - return FALSE; - } - - - if (chspec_bw == WL_CHANSPEC_BW_20) { - - for (i = 0; i < num_ch; i ++) { - if (chspec_ch == (uint)LOWER_20_SB(center_ch[i]) || - chspec_ch == (uint)UPPER_20_SB(center_ch[i])) - break; - } - - if (i == num_ch) { - - if (chspec_ch == 34 || chspec_ch == 38 || - chspec_ch == 42 || chspec_ch == 46) - i = 0; - } - } else { - - for (i = 0; i < num_ch; i ++) { - if (chspec_ch == center_ch[i]) - break; - } - } - - if (i < num_ch) { - return TRUE; - } - } - } - - return FALSE; -} - - -uint8 -wf_chspec_ctlchan(chanspec_t chspec) -{ - uint center_chan; - uint bw_mhz; - uint sb; - - ASSERT(!wf_chspec_malformed(chspec)); - - - if (CHSPEC_IS20(chspec)) { - return CHSPEC_CHANNEL(chspec); - } else { - sb = CHSPEC_CTL_SB(chspec) >> WL_CHANSPEC_CTL_SB_SHIFT; - - if (CHSPEC_IS8080(chspec)) { - bw_mhz = 80; - - if (sb < 4) { - center_chan = CHSPEC_CHAN1(chspec); - } - else { - center_chan = CHSPEC_CHAN2(chspec); - sb -= 4; - } - - - center_chan = wf_5g_80m_chans[center_chan]; - } - else { - bw_mhz = bw_chspec_to_mhz(chspec); - center_chan = CHSPEC_CHANNEL(chspec) >> WL_CHANSPEC_CHAN_SHIFT; - } - - return (channel_to_ctl_chan(center_chan, bw_mhz, sb)); - } -} - - -chanspec_t -wf_chspec_ctlchspec(chanspec_t chspec) -{ - chanspec_t ctl_chspec = chspec; - uint8 ctl_chan; - - ASSERT(!wf_chspec_malformed(chspec)); - - - if (!CHSPEC_IS20(chspec)) { - ctl_chan = wf_chspec_ctlchan(chspec); - ctl_chspec = ctl_chan | WL_CHANSPEC_BW_20; - ctl_chspec |= CHSPEC_BAND(chspec); - } - return ctl_chspec; -} - -#endif /* D11AC_IOTYPES */ - -#ifdef D11AC_IOTYPES -extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec) -{ - chanspec_t chspec40 = chspec; - uint center_chan; - uint sb; - - ASSERT(!wf_chspec_malformed(chspec)); - - if (CHSPEC_IS80(chspec)) { - center_chan = CHSPEC_CHANNEL(chspec); - sb = CHSPEC_CTL_SB(chspec); - - if (sb == WL_CHANSPEC_CTL_SB_UL) { - - sb = WL_CHANSPEC_CTL_SB_L; - center_chan += CH_20MHZ_APART; - } else if (sb == WL_CHANSPEC_CTL_SB_UU) { - - sb = WL_CHANSPEC_CTL_SB_U; - center_chan += CH_20MHZ_APART; - } else { - center_chan -= CH_20MHZ_APART; - } - - - chspec40 = (WL_CHANSPEC_BAND_5G | WL_CHANSPEC_BW_40 | - sb | center_chan); - } - - return chspec40; -} -#endif /* D11AC_IOTYPES */ - -int -wf_mhz2channel(uint freq, uint start_factor) -{ - int ch = -1; - uint base; - int offset; - - - 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; - - - if ((freq < base) || (freq > base + 1000)) - return -1; - - offset = freq - base; - ch = offset / 5; - - - if (offset != (ch * 5)) - return -1; - - - if (start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 13)) - return -1; - - return ch; -} - - -int -wf_channel2mhz(uint ch, uint start_factor) -{ - int freq; - - if ((start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 14)) || - (ch > 200)) - freq = -1; - else if ((start_factor == WF_CHAN_FACTOR_2_4_G) && (ch == 14)) - freq = 2484; - else - freq = ch * 5 + start_factor / 2; - - return freq; -} |