* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2009, 2010 Christian Lamparter <chunkeey@googlemail.com>
+ * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "printf.h"
#include "rf.h"
#include "linux/ieee80211.h"
+#include "rom.h"
static void wlan_txunstuck(unsigned int queue)
{
#endif /* CONFIG_CARL9170FW_LOOPBACK */
}
+static void wlan_assign_seq(struct ieee80211_hdr *hdr, unsigned int vif)
+{
+ hdr->seq_ctrl &= cpu_to_le16(~IEEE80211_SCTL_SEQ);
+ hdr->seq_ctrl |= cpu_to_le16(fw.wlan.sequence[vif]);
+
+ if (!(hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)))
+ fw.wlan.sequence[vif] += 0x10;
+}
+
/* prepares frame for the first transmission */
static void _wlan_tx(struct dma_desc *desc)
{
struct carl9170_tx_superframe *super = get_super(desc);
+ if (unlikely(super->s.assign_seq)) {
+ wlan_assign_seq(&super->f.data.i3e, super->s.vif_id);
+ }
+
if (unlikely(super->s.ampdu_commit_density)) {
set(AR9170_MAC_REG_AMPDU_DENSITY,
MOD_VAL(AR9170_MAC_AMPDU_DENSITY,
}
}
+#ifdef CONFIG_CARL9170FW_WOL
+
+#ifdef CONFIG_CARL9170FW_WOL_MAGIC_PACKET
+static bool wlan_rx_wol_magic_packet(struct ieee80211_hdr *hdr, unsigned int len)
+{
+ const unsigned char *data, *end, *mac;
+ unsigned int found = 0;
+
+ /*
+ * LIMITATION:
+ * We can only scan the first AR9170_BLOCK_SIZE [=~320] bytes
+ * for MAGIC patterns!
+ */
+
+ /*
+ * TODO:
+ * Currently, the MAGIC MAC Address is fixed to the EEPROM default.
+ * It's possible to make it fully configurable, e.g:
+ *
+ * mac = (const unsigned char *) AR9170_MAC_REG_MAC_ADDR_L;
+ * But this will clash with the driver's suspend path, because it
+ * needs to reset the registers.
+ */
+ mac = rom.sys.mac_address;
+
+ data = (u8 *)((unsigned long)hdr + ieee80211_hdrlen(hdr->frame_control));
+ end = (u8 *)((unsigned long)hdr + len);
+
+ /*
+ * scan for standard WOL Magic frame
+ *
+ * "A physical WakeOnLAN (Magic Packet) will look like this:
+ * ---------------------------------------------------------------
+ * | Synchronization Stream | Target MAC | Password (optional) |
+ * | 6 octets | 96 octets | 0, 4 or 6 |
+ * ---------------------------------------------------------------
+ *
+ * The Synchronization Stream is defined as 6 bytes of FFh.
+ * The Target MAC block contains 16 duplications of the IEEEaddress
+ * of the target, with no breaks or interruptions.
+ *
+ * The Password field is optional, but if present, contains either
+ * 4 bytes or 6 bytes. The WakeOnLAN dissector was implemented to
+ * dissect the password, if present, according to the command-line
+ * format that ether-wake uses, therefore, if a 4-byte password is
+ * present, it will be dissected as an IPv4 address and if a 6-byte
+ * password is present, it will be dissected as an Ethernet address.
+ *
+ * <http://wiki.wireshark.org/WakeOnLAN>
+ */
+
+ while (data < end) {
+ if (found >= 6) {
+ if (*data == mac[found % 6])
+ found++;
+ else
+ found = 0;
+ }
+
+ /* previous check might reset found counter */
+ if (found < 6) {
+ if (*data == 0xff)
+ found++;
+ else
+ found = 0;
+ }
+
+ if (found == (6 + 16 * 6)) {
+ return true;
+ }
+
+ data++;
+ }
+
+ return false;
+}
+#endif /* CONFIG_CARL9170FW_WOL_MAGIC_PACKET */
+
+#ifdef CONFIG_CARL9170FW_WOL_PROBE_REQUEST
+
+/*
+ * Note: CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID is not a real
+ * string. We have to be careful not to add a \0 at the end.
+ */
+static const struct {
+ u8 ssid_ie;
+ u8 ssid_len;
+ u8 ssid[sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1];
+} __packed probe_req = {
+ .ssid_ie = WLAN_EID_SSID,
+ .ssid_len = sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1,
+ .ssid = CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID,
+};
+
+static bool wlan_rx_wol_probe_ssid(struct ieee80211_hdr *hdr, unsigned int len)
+{
+ const unsigned char *data, *end, *scan = (void *) &probe_req;
+
+ /*
+ * IEEE 802.11-2007 7.3.2.1 specifies that the SSID is no
+ * longer than 32 octets.
+ */
+ BUILD_BUG_ON((sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1) > 32);
+
+ if (ieee80211_is_probe_req(hdr->frame_control)) {
+ unsigned int i;
+ end = (u8 *)((unsigned long)hdr + len);
+
+ /*
+ * The position of the SSID information element inside
+ * a probe request frame is more or less "fixed".
+ */
+ data = (u8 *)((struct ieee80211_mgmt *)hdr)->u.probe_req.variable;
+ for (i = 0; i < (unsigned int)(probe_req.ssid_len + 1); i++) {
+ if (scan[i] != data[i])
+ return false;
+ }
+
+ return true;
+ }
+
+ return false;
+}
+#endif /* CONFIG_CARL9170FW_WOL_PROBE_REQUEST */
+
+static void wlan_rx_wol(unsigned int rx_filter __unused, struct ieee80211_hdr *hdr __unused, unsigned int len __unused)
+{
+ bool __unused wake_up = false;
+
+#ifdef CONFIG_CARL9170FW_WOL_MAGIC_PACKET
+ if (rx_filter & CARL9170_RX_FILTER_DATA)
+ wake_up |= wlan_rx_wol_magic_packet(hdr, len);
+#endif /* CONFIG_CARL9170FW_WOL_MAGIC_PACKET */
+
+#ifdef CONFIG_CARL9170FW_WOL_PROBE_REQUEST
+ if (rx_filter & CARL9170_RX_FILTER_MGMT)
+ wake_up |= wlan_rx_wol_probe_ssid(hdr, len);
+#endif /* CONFIG_CARL9170FW_WOL_PROBE_REQUEST */
+
+ if (wake_up) {
+ fw.suspend_mode = CARL9170_AWAKE_HOST;
+ set(AR9170_USB_REG_WAKE_UP, AR9170_USB_WAKE_UP_WAKE);
+ }
+}
+#endif /* CONFIG_CARL9170FW_WOL */
+
static unsigned int wlan_rx_filter(struct dma_desc *desc)
{
struct ieee80211_hdr *hdr;
rx_filter |= CARL9170_RX_FILTER_MGMT;
}
+#ifdef CONFIG_CARL9170FW_WOL
+ if (unlikely(fw.suspend_mode == CARL9170_HOST_SUSPENDED)) {
+ wlan_rx_wol(rx_filter, hdr, min(data_len,
+ (unsigned int)AR9170_BLOCK_SIZE));
+ }
+#endif /* CONFIG_CARL9170FW_WOL */
+
#undef AR9170_RX_ERROR_BAD
return rx_filter;
return NULL;
}
-void wlan_cab_modify_dtim_beacon(const unsigned int vif,
+void wlan_modify_beacon(const unsigned int vif,
const unsigned int addr, const unsigned int len)
{
uint8_t *_ie;
ie->bitmap_ctrl |= 0x1;
}
}
+
+ /*
+ * Ideally, the sequence number should be assigned by the TX arbiter
+ * hardware. But AFAIK that's not possible, so we have to go for the
+ * next best thing and write it into the beacon fifo during the open
+ * beacon update window.
+ */
+
+ wlan_assign_seq((struct ieee80211_hdr *)addr, vif);
}
#endif /* CONFIG_CARL9170FW_CAB_QUEUE */
bcn_count = get(AR9170_MAC_REG_BCN_COUNT);
send_cmd_to_host(4, CARL9170_RSP_BEACON_CONFIG, 0x00,
(uint8_t *) &bcn_count);
-
- set(AR9170_MAC_REG_BCN_CTRL, AR9170_BCN_CTRL_READY);
}
static void handle_pretbtt(void)
projects / carl9170fw.git / blobdiff