1 files changed, 447 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-led.c b/drivers/net/wireless/iwlwifi/iwl-led.c
new file mode 100644
index 000000000000..d59ad1844e25
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-led.c
@@ -0,0 +1,447 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ *****************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/wireless.h>
+#include <net/mac80211.h>
+#include <linux/etherdevice.h>
+#include <asm/unaligned.h>
+
+#include "iwl-4965.h"
+#include "iwl-io.h"
+#include "iwl-core.h"
+#include "iwl-helpers.h"
+
+#define IWL_1MB_RATE (128 * 1024)
+#define IWL_LED_THRESHOLD (16)
+#define IWL_MAX_BLINK_TBL (10)
+
+static const struct {
+	u16 tpt;
+	u8 on_time;
+	u8 of_time;
+} blink_tbl[] =
+{
+	{300, 25, 25},
+	{200, 40, 40},
+	{100, 55, 55},
+	{70, 65, 65},
+	{50, 75, 75},
+	{20, 85, 85},
+	{15, 95, 95 },
+	{10, 110, 110},
+	{5, 130, 130},
+	{0, 167, 167}
+};
+
+static int iwl_led_cmd_callback(struct iwl_priv *priv,
+				struct iwl_cmd *cmd, struct sk_buff *skb)
+{
+	return 1;
+}
+
+
+/* Send led command */
+static int iwl_send_led_cmd(struct iwl_priv *priv,
+			    struct iwl4965_led_cmd *led_cmd)
+{
+	struct iwl_host_cmd cmd = {
+		.id = REPLY_LEDS_CMD,
+		.len = sizeof(struct iwl4965_led_cmd),
+		.data = led_cmd,
+		.meta.flags = CMD_ASYNC,
+		.meta.u.callback = iwl_led_cmd_callback
+	};
+	u32 reg;
+
+	reg = iwl_read32(priv, CSR_LED_REG);
+	if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
+		iwl_write32(priv, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK);
+
+	return iwl_send_cmd(priv, &cmd);
+}
+
+
+/* Set led on command */
+static int iwl4965_led_on(struct iwl_priv *priv, int led_id)
+{
+	struct iwl4965_led_cmd led_cmd = {
+		.id = led_id,
+		.on = IWL_LED_SOLID,
+		.off = 0,
+		.interval = IWL_DEF_LED_INTRVL
+	};
+	return iwl_send_led_cmd(priv, &led_cmd);
+}
+
+/* Set led on command */
+static int iwl4965_led_pattern(struct iwl_priv *priv, int led_id,
+			       enum led_brightness brightness)
+{
+	struct iwl4965_led_cmd led_cmd = {
+		.id = led_id,
+		.on = brightness,
+		.off = brightness,
+		.interval = IWL_DEF_LED_INTRVL
+	};
+	if (brightness == LED_FULL) {
+		led_cmd.on = IWL_LED_SOLID;
+		led_cmd.off = 0;
+	}
+	return iwl_send_led_cmd(priv, &led_cmd);
+}
+
+/* Set led register off */
+static int iwl4965_led_on_reg(struct iwl_priv *priv, int led_id)
+{
+	IWL_DEBUG_LED("led on %d\n", led_id);
+	iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
+	return 0;
+}
+
+#if 0
+/* Set led off command */
+int iwl4965_led_off(struct iwl_priv *priv, int led_id)
+{
+	struct iwl4965_led_cmd led_cmd = {
+		.id = led_id,
+		.on = 0,
+		.off = 0,
+		.interval = IWL_DEF_LED_INTRVL
+	};
+	IWL_DEBUG_LED("led off %d\n", led_id);
+	return iwl_send_led_cmd(priv, &led_cmd);
+}
+#endif
+
+
+/* Set led register off */
+static int iwl4965_led_off_reg(struct iwl_priv *priv, int led_id)
+{
+	IWL_DEBUG_LED("radio off\n");
+	iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_OFF);
+	return 0;
+}
+
+/* Set led blink command */
+static int iwl4965_led_not_solid(struct iwl_priv *priv, int led_id,
+			       u8 brightness)
+{
+	struct iwl4965_led_cmd led_cmd = {
+		.id = led_id,
+		.on = brightness,
+		.off = brightness,
+		.interval = IWL_DEF_LED_INTRVL
+	};
+
+	return iwl_send_led_cmd(priv, &led_cmd);
+}
+
+
+/*
+ * brightness call back function for Tx/Rx LED
+ */
+static int iwl4965_led_associated(struct iwl_priv *priv, int led_id)
+{
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
+	    !test_bit(STATUS_READY, &priv->status))
+		return 0;
+
+
+	/* start counting Tx/Rx bytes */
+	if (!priv->last_blink_time && priv->allow_blinking)
+		priv->last_blink_time = jiffies;
+	return 0;
+}
+
+/*
+ * brightness call back for association and radio
+ */
+static void iwl4965_led_brightness_set(struct led_classdev *led_cdev,
+				       enum led_brightness brightness)
+{
+	struct iwl4965_led *led = container_of(led_cdev,
+					       struct iwl4965_led, led_dev);
+	struct iwl_priv *priv = led->priv;
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return;
+
+	switch (brightness) {
+	case LED_FULL:
+		if (led->type == IWL_LED_TRG_ASSOC)
+			priv->allow_blinking = 1;
+
+		if (led->led_on)
+			led->led_on(priv, IWL_LED_LINK);
+		break;
+	case LED_OFF:
+		if (led->type == IWL_LED_TRG_ASSOC)
+			priv->allow_blinking = 0;
+
+		if (led->led_off)
+			led->led_off(priv, IWL_LED_LINK);
+		break;
+	default:
+		if (led->led_pattern)
+			led->led_pattern(priv, IWL_LED_LINK, brightness);
+		break;
+	}
+}
+
+
+
+/*
+ * Register led class with the system
+ */
+static int iwl_leds_register_led(struct iwl_priv *priv,
+				   struct iwl4965_led *led,
+				   enum led_type type, u8 set_led,
+				   const char *name, char *trigger)
+{
+	struct device *device = wiphy_dev(priv->hw->wiphy);
+	int ret;
+
+	led->led_dev.name = name;
+	led->led_dev.brightness_set = iwl4965_led_brightness_set;
+	led->led_dev.default_trigger = trigger;
+
+	ret = led_classdev_register(device, &led->led_dev);
+	if (ret) {
+		IWL_ERROR("Error: failed to register led handler.\n");
+		return ret;
+	}
+
+	led->priv = priv;
+	led->type = type;
+	led->registered = 1;
+
+	if (set_led && led->led_on)
+		led->led_on(priv, IWL_LED_LINK);
+	return 0;
+}
+
+
+/*
+ * calculate blink rate according to last 2 sec Tx/Rx activities
+ */
+static inline u8 get_blink_rate(struct iwl_priv *priv)
+{
+	int i;
+	u8 blink_rate;
+	u64 current_tpt = priv->tx_stats[2].bytes + priv->rx_stats[2].bytes;
+	s64 tpt = current_tpt - priv->led_tpt;
+
+	if (tpt < 0) /* wrapparound */
+		tpt = -tpt;
+
+	priv->led_tpt = current_tpt;
+
+	if (tpt < IWL_LED_THRESHOLD) {
+		i = IWL_MAX_BLINK_TBL;
+	} else {
+		for (i = 0; i < IWL_MAX_BLINK_TBL; i++)
+			if (tpt  > (blink_tbl[i].tpt * IWL_1MB_RATE))
+				break;
+	}
+	/* if 0 frame is transfered */
+	if ((i == IWL_MAX_BLINK_TBL) || !priv->allow_blinking)
+		blink_rate = IWL_LED_SOLID;
+	else
+		blink_rate = blink_tbl[i].on_time;
+
+	return blink_rate;
+}
+
+static inline int is_rf_kill(struct iwl_priv *priv)
+{
+	return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
+		test_bit(STATUS_RF_KILL_SW, &priv->status);
+}
+
+/*
+ * this function called from handler. Since setting Led command can
+ * happen very frequent we postpone led command to be called from
+ * REPLY handler so we know ucode is up
+ */
+void iwl_leds_background(struct iwl_priv *priv)
+{
+	u8 blink_rate;
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
+		priv->last_blink_time = 0;
+		return;
+	}
+	if (is_rf_kill(priv)) {
+		priv->last_blink_time = 0;
+		return;
+	}
+
+	if (!priv->allow_blinking) {
+		priv->last_blink_time = 0;
+		if (priv->last_blink_rate != IWL_LED_SOLID) {
+			priv->last_blink_rate = IWL_LED_SOLID;
+			iwl4965_led_on(priv, IWL_LED_LINK);
+		}
+		return;
+	}
+	if (!priv->last_blink_time ||
+	    !time_after(jiffies, priv->last_blink_time +
+			msecs_to_jiffies(1000)))
+		return;
+
+	blink_rate = get_blink_rate(priv);
+
+	/* call only if blink rate change */
+	if (blink_rate != priv->last_blink_rate) {
+		if (blink_rate != IWL_LED_SOLID) {
+			priv->last_blink_time = jiffies +
+						msecs_to_jiffies(1000);
+			iwl4965_led_not_solid(priv, IWL_LED_LINK, blink_rate);
+		} else {
+			priv->last_blink_time = 0;
+			iwl4965_led_on(priv, IWL_LED_LINK);
+		}
+	}
+
+	priv->last_blink_rate = blink_rate;
+}
+EXPORT_SYMBOL(iwl_leds_background);
+
+/* Register all led handler */
+int iwl_leds_register(struct iwl_priv *priv)
+{
+	char *trigger;
+	char name[32];
+	int ret;
+
+	priv->last_blink_rate = 0;
+	priv->led_tpt = 0;
+	priv->last_blink_time = 0;
+	priv->allow_blinking = 0;
+
+	trigger = ieee80211_get_radio_led_name(priv->hw);
+	snprintf(name, sizeof(name), "iwl-%s:radio",
+		 wiphy_name(priv->hw->wiphy));
+
+	priv->led[IWL_LED_TRG_RADIO].led_on = iwl4965_led_on_reg;
+	priv->led[IWL_LED_TRG_RADIO].led_off = iwl4965_led_off_reg;
+	priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
+
+	ret = iwl_leds_register_led(priv,
+				   &priv->led[IWL_LED_TRG_RADIO],
+				   IWL_LED_TRG_RADIO, 1,
+				   name, trigger);
+	if (ret)
+		goto exit_fail;
+
+	trigger = ieee80211_get_assoc_led_name(priv->hw);
+	snprintf(name, sizeof(name), "iwl-%s:assoc",
+		 wiphy_name(priv->hw->wiphy));
+
+	ret = iwl_leds_register_led(priv,
+				   &priv->led[IWL_LED_TRG_ASSOC],
+				   IWL_LED_TRG_ASSOC, 0,
+				   name, trigger);
+	/* for assoc always turn led on */
+	priv->led[IWL_LED_TRG_ASSOC].led_on = iwl4965_led_on_reg;
+	priv->led[IWL_LED_TRG_ASSOC].led_off = iwl4965_led_on_reg;
+	priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
+
+	if (ret)
+		goto exit_fail;
+
+	trigger = ieee80211_get_rx_led_name(priv->hw);
+	snprintf(name, sizeof(name), "iwl-%s:RX",
+		 wiphy_name(priv->hw->wiphy));
+
+
+	ret = iwl_leds_register_led(priv,
+				   &priv->led[IWL_LED_TRG_RX],
+				   IWL_LED_TRG_RX, 0,
+				   name, trigger);
+
+	priv->led[IWL_LED_TRG_RX].led_on = iwl4965_led_associated;
+	priv->led[IWL_LED_TRG_RX].led_off = iwl4965_led_associated;
+	priv->led[IWL_LED_TRG_RX].led_pattern = iwl4965_led_pattern;
+
+	if (ret)
+		goto exit_fail;
+
+	trigger = ieee80211_get_tx_led_name(priv->hw);
+	snprintf(name, sizeof(name), "iwl-%s:TX",
+		 wiphy_name(priv->hw->wiphy));
+	ret = iwl_leds_register_led(priv,
+				   &priv->led[IWL_LED_TRG_TX],
+				   IWL_LED_TRG_TX, 0,
+				   name, trigger);
+	priv->led[IWL_LED_TRG_TX].led_on = iwl4965_led_associated;
+	priv->led[IWL_LED_TRG_TX].led_off = iwl4965_led_associated;
+	priv->led[IWL_LED_TRG_TX].led_pattern = iwl4965_led_pattern;
+
+	if (ret)
+		goto exit_fail;
+
+	return 0;
+
+exit_fail:
+	iwl_leds_unregister(priv);
+	return ret;
+}
+EXPORT_SYMBOL(iwl_leds_register);
+
+/* unregister led class */
+static void iwl_leds_unregister_led(struct iwl4965_led *led, u8 set_led)
+{
+	if (!led->registered)
+		return;
+
+	led_classdev_unregister(&led->led_dev);
+
+	if (set_led)
+		led->led_dev.brightness_set(&led->led_dev, LED_OFF);
+	led->registered = 0;
+}
+
+/* Unregister all led handlers */
+void iwl_leds_unregister(struct iwl_priv *priv)
+{
+	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
+	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
+	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
+	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
+}
+EXPORT_SYMBOL(iwl_leds_unregister);
+