BWN_CHANNEL_EXT
BWN_WRITE_2(mac, BWN_CHANNEL_EXT,
(BWN_READ_2(mac, BWN_CHANNEL_EXT) | 0x2000));
chan_ex = BWN_READ_2(mac, BWN_CHANNEL_EXT);
BWN_WRITE_2(mac, BWN_CHANNEL_EXT,
BWN_READ_2(mac, BWN_CHANNEL_EXT) | 0x2000);
BWN_WRITE_2(mac, BWN_CHANNEL_EXT, chan_ex);
BWN_WRITE_2(mac, BWN_CHANNEL_EXT,
BWN_READ_2(mac, BWN_CHANNEL_EXT) | (1 << 11));
BWN_WRITE_2(mac, BWN_CHANNEL_EXT,
BWN_READ_2(mac, BWN_CHANNEL_EXT) & 0xf7bf);