staging: brcm80211: honour basic rate configuration from mac80211

The basic rates to be used are provided by the wireless access point
within the beacon information. The station should conform to those
rates and this information is passed by mac80211 to the driver. The
patch processes the information and applies the basic rates accor-
dingly. This is required functionality for mac80211 drivers.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
Cc: Brett Rudley <brudley@broadcom.com>
Cc: Henry Ptasinski <henryp@broadcom.com>
Cc: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 48 insertions, 2 deletions

diff --git a/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c b/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c
index 0faf105..770ff93 100644
--- a/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c
+++ b/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c
@@ -83,6 +83,7 @@ static int __devinit wl_pci_probe(struct pci_dev *pdev,
 				  const struct pci_device_id *ent);
 static void wl_remove(struct pci_dev *pdev);
 static void wl_free(struct wl_info *wl);
+static void wl_set_basic_rate(struct wl_rateset *rs, u16 rate, bool is_br);
 
 MODULE_AUTHOR("Broadcom Corporation");
 MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver.");
@@ -367,9 +368,37 @@ wl_ops_bss_info_changed(struct ieee80211_hw *hw,
 			mode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT);
 	}
 	if (changed & BSS_CHANGED_BASIC_RATES) {
+		struct ieee80211_supported_band *bi;
+		u32 br_mask, i;
+		u16 rate;
+		struct wl_rateset rs;
+		int error;
+
 		/* Basic rateset changed */
-		wiphy_err(wiphy, "%s: Need to change Basic Rates: 0x%x"
-			  " (implement)\n", __func__, (u32) info->basic_rates);
+		no_printk("%s: change basic rates: 0x%x\n",
+			 __func__, (u32) info->basic_rates);
+
+		/* retrieve the current rates */
+		error = wlc_ioctl(wl->wlc, WLC_GET_CURR_RATESET,
+				  &rs, sizeof(rs), NULL);
+		if (error) {
+			wiphy_err(wiphy, "%s: retrieve rateset failed: %d\n",
+				  __func__, error);
+			return;
+		}
+		br_mask = info->basic_rates;
+		bi = hw->wiphy->bands[wlc_get_curband(wl->wlc)];
+		for (i = 0; i < bi->n_bitrates; i++) {
+			/* convert to internal rate value */
+			rate = (bi->bitrates[i].bitrate << 1) / 10;
+
+			/* set/clear basic rate flag */
+			wl_set_basic_rate(&rs, rate, br_mask & 1);
+			br_mask >>= 1;
+		}
+
+		/* update the rate set */
+		wlc_ioctl(wl->wlc, WLC_SET_RATESET, &rs, sizeof(rs), NULL);
 	}
 	if (changed & BSS_CHANGED_BEACON_INT) {
 		/* Beacon interval changed */
@@ -1355,6 +1384,23 @@ static void wl_free(struct wl_info *wl)
 	wl->regsva = NULL;
 }
 
+/* flags the given rate in rateset as requested */
+static void wl_set_basic_rate(struct wl_rateset *rs, u16 rate, bool is_br)
+{
+	u32 i;
+
+	for (i = 0; i < rs->count; i++) {
+		if (rate != (rs->rates[i] & 0x7f))
+			continue;
+
+		if (is_br)
+			rs->rates[i] |= WLC_RATE_FLAG;
+		else
+			rs->rates[i] &= WLC_RATE_MASK;
+		return;
+	}
+}
+
 /*
  * precondition: perimeter lock has been acquired
  */