diff options
Diffstat (limited to 'drivers/net/wireless/bcmdhd/bcmwifi.c')
| -rw-r--r-- | drivers/net/wireless/bcmdhd/bcmwifi.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcmdhd/bcmwifi.c b/drivers/net/wireless/bcmdhd/bcmwifi.c new file mode 100644 index 000000000000..70722170bdfd --- /dev/null +++ b/drivers/net/wireless/bcmdhd/bcmwifi.c @@ -0,0 +1,274 @@ +/* + * 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,v 1.31.8.1 2010-08-03 17:47:05 Exp $ + */ + + +#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 +#include <bcmwifi.h> + +#if defined(WIN32) && (defined(BCMDLL) || defined(WLMDLL)) +#include <bcmstdlib.h> +#endif + + + + + +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(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_UNCOND(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; +} + + +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; +} |