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path: root/drivers/net/wireless/bcmdhd/wl_roam.c
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Diffstat (limited to 'drivers/net/wireless/bcmdhd/wl_roam.c')
-rwxr-xr-xdrivers/net/wireless/bcmdhd/wl_roam.c288
1 files changed, 288 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcmdhd/wl_roam.c b/drivers/net/wireless/bcmdhd/wl_roam.c
new file mode 100755
index 0000000..708fb3b
--- /dev/null
+++ b/drivers/net/wireless/bcmdhd/wl_roam.c
@@ -0,0 +1,288 @@
+/*
+ * Linux roam cache
+ *
+ * Copyright (C) 1999-2012, 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: wl_roam.c 334946 2012-05-24 20:38:00Z $
+ */
+
+#include <typedefs.h>
+#include <osl.h>
+#include <bcmwifi_channels.h>
+#include <wlioctl.h>
+
+#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
+#include <wldev_common.h>
+
+#define WL_ERROR(x) printk x
+#endif
+
+#define WL_DBG(x)
+
+#define MAX_ROAM_CACHE 100
+
+typedef struct {
+ chanspec_t chanspec;
+ int ssid_len;
+ char ssid[36];
+} roam_channel_cache;
+
+static int n_roam_cache = 0;
+static int roam_band = WLC_BAND_AUTO;
+static roam_channel_cache roam_cache[MAX_ROAM_CACHE];
+#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
+static int roamscan_mode = 0;
+#endif
+
+#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
+int get_roamscan_mode(struct net_device *dev, int *mode)
+{
+ *mode = roamscan_mode;
+
+ return 0;
+}
+
+int set_roamscan_mode(struct net_device *dev, int mode)
+{
+ int error = 0;
+ roamscan_mode = mode;
+ n_roam_cache = 0;
+
+ error = wldev_iovar_setint(dev, "roamscan_mode", mode);
+ if (error) {
+ WL_ERROR(("Failed to set roamscan mode to %d, error = %d\n", mode, error));
+ }
+
+ return error;
+}
+
+int get_roamscan_channel_list(struct net_device *dev, unsigned char channels[])
+{
+ int n = 0;
+
+ if (roamscan_mode) {
+ for (n = 0; n < n_roam_cache; n++) {
+ channels[n] = roam_cache[n].chanspec & WL_CHANSPEC_CHAN_MASK;
+
+ WL_DBG(("%s: channel[%d] - [%02d] \n", __FUNCTION__, n, channels[n]));
+ }
+ }
+
+ return n;
+}
+
+int set_roamscan_channel_list(struct net_device *dev,
+ unsigned char n, unsigned char channels[], int ioctl_ver)
+{
+ int i;
+ int error;
+ struct {
+ int n;
+ chanspec_t channels[20];
+ } channel_list;
+ char iobuf[200];
+ uint band, band2G, band5G, bw;
+ roamscan_mode = 1;
+
+ if (n > 20)
+ n = 20;
+
+#ifdef D11AC_IOTYPES
+ if (ioctl_ver == 1) {
+ /* legacy chanspec */
+ band2G = WL_LCHANSPEC_BAND_2G;
+ band5G = WL_LCHANSPEC_BAND_5G;
+ bw = WL_LCHANSPEC_BW_20 | WL_LCHANSPEC_CTL_SB_NONE;
+ } else {
+ band2G = WL_CHANSPEC_BAND_2G;
+ band5G = WL_CHANSPEC_BAND_5G;
+ bw = WL_CHANSPEC_BW_20;
+ }
+#else
+ band2G = WL_CHANSPEC_BAND_2G;
+ band5G = WL_CHANSPEC_BAND_5G;
+ bw = WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
+#endif /* D11AC_IOTYPES */
+
+ for (i = 0; i < n; i++) {
+ chanspec_t chanspec;
+
+ if (channels[i] <= 14) {
+ chanspec = band2G | bw | channels[i];
+ } else {
+ chanspec = band5G | bw | channels[i];
+ }
+ roam_cache[i].chanspec = chanspec;
+ channel_list.channels[i] = chanspec;
+
+ WL_DBG(("%s: channel[%d] - [%02d] \n", __FUNCTION__, i, channels[i]));
+ }
+
+ n_roam_cache = n;
+ channel_list.n = n;
+
+ error = wldev_iovar_setbuf(dev, "roamscan_channels", &channel_list,
+ sizeof(channel_list), iobuf, sizeof(iobuf), NULL);
+ if (error) {
+ WL_ERROR(("Failed to set roamscan channels, error = %d\n", error));
+ }
+
+ return error;
+}
+#endif /* WES_SUPPORT */
+
+void set_roam_band(int band)
+{
+ roam_band = band;
+}
+
+void reset_roam_cache(void)
+{
+#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
+ if (roamscan_mode)
+ return;
+#endif
+
+ n_roam_cache = 0;
+}
+
+void add_roam_cache(wl_bss_info_t *bi)
+{
+ int i;
+ uint8 channel;
+
+#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
+ if (roamscan_mode)
+ return;
+#endif
+
+ if (n_roam_cache == MAX_ROAM_CACHE)
+ return;
+
+ for (i = 0; i < n_roam_cache; i++) {
+ if ((roam_cache[i].ssid_len == bi->SSID_len) &&
+ (roam_cache[i].chanspec == bi->chanspec) &&
+ (memcmp(roam_cache[i].ssid, bi->SSID, bi->SSID_len) == 0)) {
+ /* identical one found, just return */
+ return;
+ }
+ }
+
+ roam_cache[n_roam_cache].ssid_len = bi->SSID_len;
+ channel = (bi->ctl_ch == 0) ? CHSPEC_CHANNEL(bi->chanspec) : bi->ctl_ch;
+ roam_cache[n_roam_cache].chanspec =
+ WL_CHANSPEC_BW_20 |
+ (channel <= 14 ? WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G) |
+ channel;
+ memcpy(roam_cache[n_roam_cache].ssid, bi->SSID, bi->SSID_len);
+
+ n_roam_cache++;
+}
+
+int get_roam_channel_list(int target_chan,
+ chanspec_t *channels, const wlc_ssid_t *ssid, int ioctl_ver)
+{
+ int i, n = 1;
+ uint band, band2G, band5G, bw;
+
+#ifdef D11AC_IOTYPES
+ if (ioctl_ver == 1) {
+ /* legacy chanspec */
+ band2G = WL_LCHANSPEC_BAND_2G;
+ band5G = WL_LCHANSPEC_BAND_5G;
+ bw = WL_LCHANSPEC_BW_20 | WL_LCHANSPEC_CTL_SB_NONE;
+ } else {
+ band2G = WL_CHANSPEC_BAND_2G;
+ band5G = WL_CHANSPEC_BAND_5G;
+ bw = WL_CHANSPEC_BW_20;
+ }
+#else
+ band2G = WL_CHANSPEC_BAND_2G;
+ band5G = WL_CHANSPEC_BAND_5G;
+ bw = WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
+#endif /* D11AC_IOTYPES */
+
+ if (target_chan <= 14)
+ band = band2G;
+ else
+ band = band5G;
+ *channels = (target_chan & WL_CHANSPEC_CHAN_MASK) | band | bw;
+ WL_DBG((" %s: %02d 0x%04X\n", __FUNCTION__, target_chan, *channels));
+ ++channels;
+
+#if defined(CUSTOMER_HW4) && defined(WES_SUPPORT)
+ if (roamscan_mode) {
+ for (i = 0; i < n_roam_cache; i++) {
+ if ((roam_cache[i].chanspec & WL_CHANSPEC_CHAN_MASK) != target_chan) {
+ *channels = roam_cache[i].chanspec & WL_CHANSPEC_CHAN_MASK;
+ WL_DBG((" %s: %02d\n", __FUNCTION__, *channels));
+ if (*channels <= 14)
+ *channels |= band2G | bw;
+ else
+ *channels |= band5G | bw;
+
+ channels++;
+ n++;
+ }
+ }
+
+ return n;
+ }
+#endif /* WES_SUPPORT */
+
+ for (i = 0; i < n_roam_cache; i++) {
+ chanspec_t ch = roam_cache[i].chanspec;
+ if ((roam_cache[i].ssid_len == ssid->SSID_len) &&
+ ((ch & WL_CHANSPEC_CHAN_MASK) != target_chan) &&
+ ((roam_band == WLC_BAND_AUTO) ||
+ ((roam_band == WLC_BAND_2G) && CHSPEC_IS2G(ch)) ||
+ ((roam_band == WLC_BAND_5G) && CHSPEC_IS5G(ch))) &&
+ (memcmp(roam_cache[i].ssid, ssid->SSID, ssid->SSID_len) == 0)) {
+ /* match found, add it */
+ *channels = ch & WL_CHANSPEC_CHAN_MASK;
+ if (*channels <= 14)
+ *channels |= band2G | bw;
+ else
+ *channels |= band5G | bw;
+
+ WL_DBG((" %s: %02d 0x%04X\n", __FUNCTION__,
+ ch & WL_CHANSPEC_CHAN_MASK, *channels));
+
+ channels++; n++;
+ }
+ }
+
+ return n;
+}
+
+
+void print_roam_cache(void)
+{
+ int i;
+
+ WL_DBG((" %d cache\n", n_roam_cache));
+
+ for (i = 0; i < n_roam_cache; i++) {
+ roam_cache[i].ssid[roam_cache[i].ssid_len] = 0;
+ WL_DBG(("0x%02X %02d %s\n", roam_cache[i].chanspec,
+ roam_cache[i].ssid_len, roam_cache[i].ssid));
+ }
+}