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path: root/drivers/net/wireless/libertas/cmd.c
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Diffstat (limited to 'drivers/net/wireless/libertas/cmd.c')
-rw-r--r--drivers/net/wireless/libertas/cmd.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
index 54ef990a46c..9064513aea0 100644
--- a/drivers/net/wireless/libertas/cmd.c
+++ b/drivers/net/wireless/libertas/cmd.c
@@ -2007,3 +2007,99 @@ void lbs_ps_confirm_sleep(struct lbs_private *priv, u16 psmode)
lbs_deb_leave(LBS_DEB_HOST);
}
+
+
+/**
+ * @brief Simple way to call firmware functions
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param psmode one of the many CMD_802_11_xxxx
+ * @param cmd pointer to the parameters structure for above command
+ * (this should not include the command, size, sequence
+ * and result fields from struct cmd_ds_gen)
+ * @param cmd_size size structure pointed to by cmd
+ * @param rsp pointer to an area where the result should be placed
+ * @param rsp_size pointer to the size of the rsp area. If the firmware
+ * returns fewer bytes, then this *rsp_size will be
+ * changed to the actual size.
+ * @return -1 in case of a higher level error, otherwise
+ * the result code from the firmware
+ */
+int lbs_cmd(struct lbs_private *priv,
+ u16 command,
+ void *cmd, int cmd_size,
+ void *rsp, int *rsp_size)
+{
+ struct lbs_adapter *adapter = priv->adapter;
+ struct cmd_ctrl_node *cmdnode;
+ struct cmd_ds_gen *cmdptr;
+ unsigned long flags;
+ int ret = 0;
+
+ lbs_deb_enter(LBS_DEB_HOST);
+ lbs_deb_host("rsp at %p, rsp_size at %p\n", rsp, rsp_size);
+
+ if (!adapter || !rsp_size) {
+ lbs_deb_host("PREP_CMD: adapter is NULL\n");
+ ret = -1;
+ goto done;
+ }
+
+ if (adapter->surpriseremoved) {
+ lbs_deb_host("PREP_CMD: card removed\n");
+ ret = -1;
+ goto done;
+ }
+
+ cmdnode = lbs_get_cmd_ctrl_node(priv);
+
+ if (cmdnode == NULL) {
+ lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
+
+ /* Wake up main thread to execute next command */
+ wake_up_interruptible(&priv->waitq);
+ ret = -1;
+ goto done;
+ }
+
+ cmdptr = (struct cmd_ds_gen *)cmdnode->bufvirtualaddr;
+ cmdnode->wait_option = CMD_OPTION_WAITFORRSP;
+ cmdnode->pdata_buf = rsp;
+ cmdnode->pdata_size = rsp_size;
+
+ /* Set sequence number, clean result, move to buffer */
+ adapter->seqnum++;
+ cmdptr->command = cpu_to_le16(command);
+ cmdptr->size = cmd_size + S_DS_GEN;
+ cmdptr->seqnum = cpu_to_le16(adapter->seqnum);
+ cmdptr->result = 0;
+ memcpy(cmdptr->cmdresp, cmd, cmd_size);
+
+ lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
+
+ /* here was the big old switch() statement, which is now obsolete,
+ * because the caller of lbs_cmd() sets up all of *cmd for us. */
+
+ cmdnode->cmdwaitqwoken = 0;
+ lbs_queue_cmd(adapter, cmdnode, 1);
+ wake_up_interruptible(&priv->waitq);
+
+ might_sleep();
+ wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
+
+ spin_lock_irqsave(&adapter->driver_lock, flags);
+ if (adapter->cur_cmd_retcode) {
+ lbs_deb_host("PREP_CMD: command failed with return code %d\n",
+ adapter->cur_cmd_retcode);
+ adapter->cur_cmd_retcode = 0;
+ ret = -1;
+ }
+ spin_unlock_irqrestore(&adapter->driver_lock, flags);
+
+done:
+ lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lbs_cmd);
+
+