carlfw/src/pattern_generator.c

   1 /*
   2  * carl9170 firmware - used by the ar9170 wireless device
   3  *
   4  * pattern generator
   5  *
   6  * Copyright 2013       Christian Lamparter <chunkeey@googlemail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "carl9170.h"
  24 #include "pattern_generator.h"
  25
  26 #if defined(CARL9170FW_PATTERN_GENERATOR)
  27
  28 void radar_pattern_generator(void)
  29 {
  30         if (fw.phy.state == CARL9170_PHY_ON) {
  31                 if (likely(fw.wlan.soft_radar == NO_RADAR ||
  32                     fw.wlan.soft_radar >= __CARL9170FW_NUM_RADARS))
  33                         return;
  34
  35                 const struct radar_info *radar = &radars[fw.wlan.soft_radar];
  36                 if (radar->pulses >= fw.wlan.pattern_index) {
  37                         fw.wlan.pattern_index = 0;
  38                 }
  39
  40                 if (radar->pulses > fw.wlan.pattern_index) {
  41                         const struct radar_info_pattern *pattern = &radar->pattern[fw.wlan.pattern_index];
  42                         if (is_after_usecs(fw.wlan.radar_last, pattern->pulse_interval)) {
  43                                 fw.wlan.radar_last = get_clock_counter();
  44                                 set(0x1C3BC0, pattern->pulse_pattern);
  45                                 set(0x1C3BBC, pattern->pulse_mode);
  46                                 udelay(pattern->pulse_width);
  47                                 set(0x1C3BBC, ~pattern->pulse_mode);
  48                                 fw.wlan.pattern_index++;
  49                         }
  50                 }
  51         }
  52 }
  53
  54 #endif /* CONFIG_CARL9170FW_RADAR */