libertas: convert PS_MODE to a direct command

Powersave looks like it got broken at some point but we'll fix that up
when the command submission stuff is more understandable, which this
series helps to do.  That said, this patch should not further break
powersave.

Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

7 files changed, 95 insertions, 126 deletions

diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
index 2c96cf3400c..5c7bb3551fb 100644
--- a/drivers/net/wireless/libertas/cmd.c
+++ b/drivers/net/wireless/libertas/cmd.c
@@ -230,42 +230,49 @@ int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 }
 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 
-static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
-				   u16 cmd_action)
+/**
+ *  @brief Sets the Power Save mode
+ *
+ *  @param priv    	A pointer to struct lbs_private structure
+ *  @param cmd_action	The Power Save operation (PS_MODE_ACTION_ENTER_PS or
+ *                         PS_MODE_ACTION_EXIT_PS)
+ *  @param block	Whether to block on a response or not
+ *
+ *  @return 	   	0 on success, error on failure
+ */
+int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
 {
-	struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
+	struct cmd_ds_802_11_ps_mode cmd;
+	int ret = 0;
 
 	lbs_deb_enter(LBS_DEB_CMD);
 
-	cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
-	cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
-				sizeof(struct cmd_header));
-	psm->action = cpu_to_le16(cmd_action);
-	psm->multipledtim = 0;
-	switch (cmd_action) {
-	case CMD_SUBCMD_ENTER_PS:
-		lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
-
-		psm->locallisteninterval = 0;
-		psm->nullpktinterval = 0;
-		psm->multipledtim =
-		    cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
-		break;
-
-	case CMD_SUBCMD_EXIT_PS:
-		lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
-		break;
-
-	case CMD_SUBCMD_SLEEP_CONFIRMED:
-		lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
-		break;
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
+	cmd.action = cpu_to_le16(cmd_action);
 
-	default:
-		break;
+	if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
+		lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
+		cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
+	} else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
+		lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
+	} else {
+		/* We don't handle CONFIRM_SLEEP here because it needs to
+		 * be fastpathed to the firmware.
+		 */
+		lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
+		ret = -EOPNOTSUPP;
+		goto out;
 	}
 
-	lbs_deb_leave(LBS_DEB_CMD);
-	return 0;
+	if (block)
+		ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
+	else
+		lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
+
+out:
+	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
+	return ret;
 }
 
 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
@@ -950,16 +957,15 @@ static void lbs_queue_cmd(struct lbs_private *priv,
 
 	/* Exit_PS command needs to be queued in the header always. */
 	if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
-		struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf[1];
+		struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf;
 
-		if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
+		if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 			if (priv->psstate != PS_STATE_FULL_POWER)
 				addtail = 0;
 		}
 	}
 
-	if (le16_to_cpu(cmdnode->cmdbuf->command) ==
-			CMD_802_11_WAKEUP_CONFIRM)
+	if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
 		addtail = 0;
 
 	spin_lock_irqsave(&priv->driver_lock, flags);
@@ -1154,7 +1160,7 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
 {
 	int ret = 0;
 	struct cmd_ctrl_node *cmdnode;
-	struct cmd_ds_command *cmdptr;
+	struct cmd_header *cmdptr;
 	unsigned long flags;
 
 	lbs_deb_enter(LBS_DEB_HOST);
@@ -1190,7 +1196,7 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
 	cmdnode->callback = NULL;
 	cmdnode->callback_arg = (unsigned long)pdata_buf;
 
-	cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
+	cmdptr = (struct cmd_header *)cmdnode->cmdbuf;
 
 	lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
 
@@ -1202,10 +1208,6 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
 	cmdptr->result = 0;
 
 	switch (cmd_no) {
-	case CMD_802_11_PS_MODE:
-		ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
-		break;
-
 	case CMD_802_11_DEEP_SLEEP:
 		cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
 		cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
@@ -1426,10 +1428,10 @@ int lbs_execute_next_command(struct lbs_private *priv)
 			/*
 			 * 1. Non-PS command:
 			 * Queue it. set needtowakeup to TRUE if current state
-			 * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
-			 * 2. PS command but not Exit_PS:
+			 * is SLEEP, otherwise call send EXIT_PS.
+			 * 2. PS command but not EXIT_PS:
 			 * Ignore it.
-			 * 3. PS command Exit_PS:
+			 * 3. PS command EXIT_PS:
 			 * Set needtowakeup to TRUE if current state is SLEEP,
 			 * otherwise send this command down to firmware
 			 * immediately.
@@ -1443,8 +1445,11 @@ int lbs_execute_next_command(struct lbs_private *priv)
 					/* w/ new scheme, it will not reach here.
 					   since it is blocked in main_thread. */
 					priv->needtowakeup = 1;
-				} else
-					lbs_ps_wakeup(priv, 0);
+				} else {
+					lbs_set_ps_mode(priv,
+							PS_MODE_ACTION_EXIT_PS,
+							false);
+				}
 
 				ret = 0;
 				goto done;
@@ -1459,7 +1464,7 @@ int lbs_execute_next_command(struct lbs_private *priv)
 				       "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
 				       psm->action);
 				if (psm->action !=
-				    cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
+				    cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 					lbs_deb_host(
 					       "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
 					list_del(&cmdnode->list);
@@ -1519,13 +1524,16 @@ int lbs_execute_next_command(struct lbs_private *priv)
 					lbs_deb_host(
 					       "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
 					       " go back to PS_SLEEP");
-					lbs_ps_sleep(priv, 0);
+					lbs_set_ps_mode(priv,
+							PS_MODE_ACTION_ENTER_PS,
+							false);
 				}
 			} else {
 				lbs_deb_host(
 				       "EXEC_NEXT_CMD: cmdpendingq empty, "
 				       "go back to PS_SLEEP");
-				lbs_ps_sleep(priv, 0);
+				lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
+						false);
 			}
 		}
 #endif
@@ -1573,43 +1581,6 @@ out:
 	lbs_deb_leave(LBS_DEB_HOST);
 }
 
-void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
-{
-	lbs_deb_enter(LBS_DEB_HOST);
-
-	/*
-	 * PS is currently supported only in Infrastructure mode
-	 * Remove this check if it is to be supported in IBSS mode also
-	 */
-
-	lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
-			      CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
-
-	lbs_deb_leave(LBS_DEB_HOST);
-}
-
-/**
- *  @brief This function sends Exit_PS command to firmware.
- *
- *  @param priv    	A pointer to struct lbs_private structure
- *  @param wait_option	wait response or not
- *  @return 	   	n/a
- */
-void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
-{
-	__le32 Localpsmode;
-
-	lbs_deb_enter(LBS_DEB_HOST);
-
-	Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
-
-	lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
-			      CMD_SUBCMD_EXIT_PS,
-			      wait_option, 0, &Localpsmode);
-
-	lbs_deb_leave(LBS_DEB_HOST);
-}
-
 /**
  *  @brief This function checks condition and prepares to
  *  send sleep confirm command to firmware if ok.
diff --git a/drivers/net/wireless/libertas/cmd.h b/drivers/net/wireless/libertas/cmd.h
index bfb36904fd9..19b1f210a19 100644
--- a/drivers/net/wireless/libertas/cmd.h
+++ b/drivers/net/wireless/libertas/cmd.h
@@ -94,10 +94,6 @@ int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 				struct sleep_params *sp);
 
-void lbs_ps_sleep(struct lbs_private *priv, int wait_option);
-
-void lbs_ps_wakeup(struct lbs_private *priv, int wait_option);
-
 void lbs_ps_confirm_sleep(struct lbs_private *priv);
 
 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on);
@@ -143,4 +139,6 @@ int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value);
 
 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value);
 
+int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block);
+
 #endif /* _LBS_CMD_H */
diff --git a/drivers/net/wireless/libertas/cmdresp.c b/drivers/net/wireless/libertas/cmdresp.c
index a4e147a11d0..83283b8efd6 100644
--- a/drivers/net/wireless/libertas/cmdresp.c
+++ b/drivers/net/wireless/libertas/cmdresp.c
@@ -49,7 +49,7 @@ void lbs_mac_event_disconnected(struct lbs_private *priv)
 	if (priv->psstate != PS_STATE_FULL_POWER) {
 		/* make firmware to exit PS mode */
 		lbs_deb_cmd("disconnected, so exit PS mode\n");
-		lbs_ps_wakeup(priv, 0);
+		lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
 	}
 	lbs_deb_leave(LBS_DEB_ASSOC);
 }
@@ -132,9 +132,9 @@ int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
 			 * lbs_execute_next_command().
 			 */
 			if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
-			    action == CMD_SUBCMD_ENTER_PS)
+			    action == PS_MODE_ACTION_ENTER_PS)
 				priv->psmode = LBS802_11POWERMODECAM;
-		} else if (action == CMD_SUBCMD_ENTER_PS) {
+		} else if (action == PS_MODE_ACTION_ENTER_PS) {
 			priv->needtowakeup = 0;
 			priv->psstate = PS_STATE_AWAKE;
 
@@ -149,11 +149,12 @@ int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
 
 				spin_unlock_irqrestore(&priv->driver_lock, flags);
 				mutex_unlock(&priv->lock);
-				lbs_ps_wakeup(priv, 0);
+				lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,
+						false);
 				mutex_lock(&priv->lock);
 				spin_lock_irqsave(&priv->driver_lock, flags);
 			}
-		} else if (action == CMD_SUBCMD_EXIT_PS) {
+		} else if (action == PS_MODE_ACTION_EXIT_PS) {
 			priv->needtowakeup = 0;
 			priv->psstate = PS_STATE_FULL_POWER;
 			lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
@@ -291,7 +292,7 @@ int lbs_process_event(struct lbs_private *priv, u32 event)
 			 * in lbs_ps_wakeup()
 			 */
 			lbs_deb_cmd("waking up ...\n");
-			lbs_ps_wakeup(priv, 0);
+			lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
 		}
 		break;
 
diff --git a/drivers/net/wireless/libertas/defs.h b/drivers/net/wireless/libertas/defs.h
index da9833f00ee..d00c728cec4 100644
--- a/drivers/net/wireless/libertas/defs.h
+++ b/drivers/net/wireless/libertas/defs.h
@@ -172,11 +172,6 @@ static inline void lbs_deb_hex(unsigned int grp, const char *prompt, u8 *buf, in
 #define MRVDRV_MAX_BSS_DESCRIPTS		16
 #define MRVDRV_MAX_REGION_CODE			6
 
-#define MRVDRV_IGNORE_MULTIPLE_DTIM		0xfffe
-#define MRVDRV_MIN_MULTIPLE_DTIM		1
-#define MRVDRV_MAX_MULTIPLE_DTIM		5
-#define MRVDRV_DEFAULT_MULTIPLE_DTIM		1
-
 #define MRVDRV_DEFAULT_LISTEN_INTERVAL		10
 
 #define	MRVDRV_CHANNELS_PER_SCAN		4
diff --git a/drivers/net/wireless/libertas/host.h b/drivers/net/wireless/libertas/host.h
index 03d2ae9bdd7..5eac1351a02 100644
--- a/drivers/net/wireless/libertas/host.h
+++ b/drivers/net/wireless/libertas/host.h
@@ -94,11 +94,9 @@
 #define CMD_802_11_BEACON_CTRL                  0x00b0
 
 /* For the IEEE Power Save */
-#define CMD_SUBCMD_ENTER_PS                     0x0030
-#define CMD_SUBCMD_EXIT_PS                      0x0031
-#define CMD_SUBCMD_SLEEP_CONFIRMED              0x0034
-#define CMD_SUBCMD_FULL_POWERDOWN               0x0035
-#define CMD_SUBCMD_FULL_POWERUP                 0x0036
+#define PS_MODE_ACTION_ENTER_PS                 0x0030
+#define PS_MODE_ACTION_EXIT_PS                  0x0031
+#define PS_MODE_ACTION_SLEEP_CONFIRMED          0x0034
 
 #define CMD_ENABLE_RSN                          0x0001
 #define CMD_DISABLE_RSN                         0x0000
@@ -163,11 +161,6 @@
 #define CMD_ACT_SET_TX_FIX_RATE                 0x0001
 #define CMD_ACT_GET_TX_RATE                     0x0002
 
-/* Define action or option for CMD_802_11_PS_MODE */
-#define CMD_TYPE_CAM                            0x0000
-#define CMD_TYPE_MAX_PSP                        0x0001
-#define CMD_TYPE_FAST_PSP                       0x0002
-
 /* Options for CMD_802_11_FW_WAKE_METHOD */
 #define CMD_WAKE_METHOD_UNCHANGED               0x0000
 #define CMD_WAKE_METHOD_COMMAND_INT             0x0001
@@ -683,11 +676,35 @@ struct cmd_ds_802_11_fw_wake_method {
 } __packed;
 
 struct cmd_ds_802_11_ps_mode {
+	struct cmd_header hdr;
+
 	__le16 action;
+
+	/* Interval for keepalive in PS mode:
+	 * 0x0000 = don't change
+	 * 0x001E = firmware default
+	 * 0xFFFF = disable
+	 */
 	__le16 nullpktinterval;
+
+	/* Number of DTIM intervals to wake up for:
+	 * 0 = don't change
+	 * 1 = firmware default
+	 * 5 = max
+	 */
 	__le16 multipledtim;
+
 	__le16 reserved;
 	__le16 locallisteninterval;
+
+	/* AdHoc awake period (FW v9+ only):
+	 * 0 = don't change
+	 * 1 = always awake (IEEE standard behavior)
+	 * 2 - 31 = sleep for (n - 1) periods and awake for 1 period
+	 * 32 - 254 = invalid
+	 * 255 = sleep at each ATIM
+	 */
+	__le16 adhoc_awake_period;
 } __packed;
 
 struct cmd_confirm_sleep {
@@ -952,17 +969,4 @@ struct cmd_ds_mesh_access {
 
 /* Number of stats counters returned by the firmware */
 #define MESH_STATS_NUM 8
-
-struct cmd_ds_command {
-	/* command header */
-	__le16 command;
-	__le16 size;
-	__le16 seqnum;
-	__le16 result;
-
-	/* command Body */
-	union {
-		struct cmd_ds_802_11_ps_mode psmode;
-	} params;
-} __packed;
 #endif
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index 3678e532874..07ece9d26c6 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -433,7 +433,7 @@ static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
 
 static int if_usb_reset_device(struct if_usb_card *cardp)
 {
-	struct cmd_ds_command *cmd = cardp->ep_out_buf + 4;
+	struct cmd_header *cmd = cardp->ep_out_buf + 4;
 	int ret;
 
 	lbs_deb_enter(LBS_DEB_USB);
@@ -441,7 +441,7 @@ static int if_usb_reset_device(struct if_usb_card *cardp)
 	*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 
 	cmd->command = cpu_to_le16(CMD_802_11_RESET);
-	cmd->size = cpu_to_le16(sizeof(struct cmd_header));
+	cmd->size = cpu_to_le16(sizeof(cmd));
 	cmd->result = cpu_to_le16(0);
 	cmd->seqnum = cpu_to_le16(0x5a5a);
 	usb_tx_block(cardp, cardp->ep_out_buf, 4 + sizeof(struct cmd_header));
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index cfd0af6725d..6c0e814bbe6 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -897,7 +897,7 @@ void lbs_remove_card(struct lbs_private *priv)
 
 	if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
 		priv->psmode = LBS802_11POWERMODECAM;
-		lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
+		lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
 	}
 
 	if (priv->is_deep_sleep) {
@@ -1060,7 +1060,7 @@ static int __init lbs_init_module(void)
 	memset(&confirm_sleep, 0, sizeof(confirm_sleep));
 	confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
 	confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
-	confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
+	confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
 	lbs_debugfs_init();
 	lbs_deb_leave(LBS_DEB_MAIN);
 	return 0;