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b43: rework band switching
We always operate on one core and simple band switch doesn't require full core reset. Simply reset the PHY. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki
John W. Linville
parent
50c1b59e2f
commit
7a8af8cf99
@ -3698,89 +3698,73 @@ static const char *band_to_string(enum ieee80211_band band)
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}
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/* Expects wl->mutex locked */
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static int b43_switch_band(struct b43_wl *wl, struct ieee80211_channel *chan)
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static int b43_switch_band(struct b43_wldev *dev,
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struct ieee80211_channel *chan)
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{
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struct b43_wldev *up_dev = NULL;
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struct b43_wldev *down_dev;
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int err;
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bool uninitialized_var(gmode);
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int prev_status;
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struct b43_phy *phy = &dev->phy;
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bool gmode;
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u32 tmp;
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/* Find a device and PHY which supports the band. */
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switch (chan->band) {
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case IEEE80211_BAND_5GHZ:
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if (wl->current_dev->phy.supports_5ghz) {
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up_dev = wl->current_dev;
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gmode = false;
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}
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gmode = false;
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break;
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case IEEE80211_BAND_2GHZ:
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if (wl->current_dev->phy.supports_2ghz) {
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up_dev = wl->current_dev;
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gmode = true;
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}
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gmode = true;
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break;
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default:
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B43_WARN_ON(1);
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return -EINVAL;
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}
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if (!up_dev) {
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b43err(wl, "Could not find a device for %s-GHz band operation\n",
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if (!((gmode && phy->supports_2ghz) ||
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(!gmode && phy->supports_5ghz))) {
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b43err(dev->wl, "This device doesn't support %s-GHz band\n",
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band_to_string(chan->band));
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return -ENODEV;
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}
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if (!!wl->current_dev->phy.gmode == !!gmode) {
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if (!!phy->gmode == !!gmode) {
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/* This device is already running. */
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return 0;
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}
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b43dbg(wl, "Switching to %s-GHz band\n",
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b43dbg(dev->wl, "Switching to %s GHz band\n",
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band_to_string(chan->band));
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down_dev = wl->current_dev;
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prev_status = b43_status(down_dev);
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/* Shutdown the currently running core. */
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if (prev_status >= B43_STAT_STARTED)
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down_dev = b43_wireless_core_stop(down_dev);
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if (prev_status >= B43_STAT_INITIALIZED)
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b43_wireless_core_exit(down_dev);
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b43_software_rfkill(dev, true);
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if (down_dev != up_dev) {
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/* We switch to a different core, so we put PHY into
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* RESET on the old core. */
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b43_phy_put_into_reset(down_dev);
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phy->gmode = gmode;
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b43_phy_put_into_reset(dev);
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switch (dev->dev->bus_type) {
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#ifdef CONFIG_B43_BCMA
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case B43_BUS_BCMA:
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tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
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if (gmode)
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tmp |= B43_BCMA_IOCTL_GMODE;
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else
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tmp &= ~B43_BCMA_IOCTL_GMODE;
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bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
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break;
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#endif
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#ifdef CONFIG_B43_SSB
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case B43_BUS_SSB:
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tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
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if (gmode)
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tmp |= B43_TMSLOW_GMODE;
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else
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tmp &= ~B43_TMSLOW_GMODE;
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ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
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break;
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#endif
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}
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b43_phy_take_out_of_reset(dev);
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/* Now start the new core. */
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up_dev->phy.gmode = gmode;
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if (prev_status >= B43_STAT_INITIALIZED) {
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err = b43_wireless_core_init(up_dev);
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if (err) {
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b43err(wl, "Fatal: Could not initialize device for "
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"selected %s-GHz band\n",
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band_to_string(chan->band));
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goto init_failure;
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}
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}
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if (prev_status >= B43_STAT_STARTED) {
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err = b43_wireless_core_start(up_dev);
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if (err) {
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b43err(wl, "Fatal: Could not start device for "
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"selected %s-GHz band\n",
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band_to_string(chan->band));
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b43_wireless_core_exit(up_dev);
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goto init_failure;
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}
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}
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B43_WARN_ON(b43_status(up_dev) != prev_status);
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b43_upload_initvals_band(dev);
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wl->current_dev = up_dev;
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b43_phy_init(dev);
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return 0;
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init_failure:
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/* Whoops, failed to init the new core. No core is operating now. */
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wl->current_dev = NULL;
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return err;
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}
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/* Write the short and long frame retry limit values. */
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@ -3813,8 +3797,10 @@ static int b43_op_config(struct ieee80211_hw *hw, u32 changed)
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dev = wl->current_dev;
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b43_mac_suspend(dev);
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/* Switch the band (if necessary). This might change the active core. */
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err = b43_switch_band(wl, conf->chandef.chan);
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err = b43_switch_band(dev, conf->chandef.chan);
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if (err)
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goto out_unlock_mutex;
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@ -3833,8 +3819,6 @@ static int b43_op_config(struct ieee80211_hw *hw, u32 changed)
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else
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phy->is_40mhz = false;
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b43_mac_suspend(dev);
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if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
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b43_set_retry_limits(dev, conf->short_frame_max_tx_count,
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conf->long_frame_max_tx_count);
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@ -96,6 +96,7 @@ int b43_phy_init(struct b43_wldev *dev)
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phy->channel = ops->get_default_chan(dev);
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phy->ops->switch_analog(dev, true);
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b43_software_rfkill(dev, false);
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err = ops->init(dev);
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if (err) {
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