libertas: rework event subscription

This patch moves re-works the implementation of event subscription
via debugfs. For this:

* it tells cmd.c and cmdresp.c about CMD_802_11_SUBSCRIBE_EVENT
* removes lots of low-level cmd stuff from debugfs.c
* create unified functions to read/write snr, rssi, bcnmiss and
  failcount
* introduces #define's for subscription event bitmask values
* add a function to search for a specific element in an IE
  (a.k.a. TLV)
* add a function to find out the size of the TLV. This is needed
  because lbs_prepare_and_send_command() has an argument for a
  data buffer, but not for it's lengths and TLVs can be, by
  definition, vary in size.
* fix a bug where it was not possible to disable an event

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/cmdresp.c b/drivers/net/wireless/libertas/cmdresp.c
index 3596957f1d5a..87b5bd2988e7 100644
--- a/drivers/net/wireless/libertas/cmdresp.c
+++ b/drivers/net/wireless/libertas/cmdresp.c
@@ -554,6 +554,26 @@ static int lbs_ret_802_11_bcn_ctrl(struct lbs_private * priv,
         return 0;
 }
 
+static int lbs_ret_802_11_subscribe_event(struct lbs_private *priv,
+        struct cmd_ds_command *resp)
+{
+        struct lbs_adapter *adapter = priv->adapter;
+        struct cmd_ds_802_11_subscribe_event *cmd_event =
+                &resp->params.subscribe_event;
+        struct cmd_ds_802_11_subscribe_event *dst_event =
+                adapter->cur_cmd->pdata_buf;
+
+        lbs_deb_enter(LBS_DEB_CMD);
+
+        if (dst_event->action == cpu_to_le16(CMD_ACT_GET)) {
+                dst_event->events = le16_to_cpu(cmd_event->events);
+                memcpy(dst_event->tlv, cmd_event->tlv, sizeof(dst_event->tlv));
+        }
+
+        lbs_deb_leave(LBS_DEB_CMD);
+        return 0;
+}
+
 static inline int handle_cmd_response(u16 respcmd,
                                       struct cmd_ds_command *resp,
                                       struct lbs_private *priv)
@@ -689,6 +709,10 @@ static inline int handle_cmd_response(u16 respcmd,
                         sizeof(struct cmd_ds_802_11_led_ctrl));
                 spin_unlock_irqrestore(&adapter->driver_lock, flags);
                 break;
+        case CMD_RET(CMD_802_11_SUBSCRIBE_EVENT):
+                ret = lbs_ret_802_11_subscribe_event(priv, resp);
+                break;
+
         case CMD_RET(CMD_802_11_PWR_CFG):
                 spin_lock_irqsave(&adapter->driver_lock, flags);
                 memmove(adapter->cur_cmd->pdata_buf, &resp->params.pwrcfg,