1 files changed, 223 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 00000000000..a67ae56d546
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-led.c
@@ -0,0 +1,223 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2011 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:
+ *  Intel Linux Wireless <ilw@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/init.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-dev.h"
+#include "iwl-core.h"
+#include "iwl-agn.h"
+#include "iwl-io.h"
+#include "iwl-trans.h"
+
+/* Throughput           OFF time(ms)    ON time (ms)
+ *      >300                    25              25
+ *      >200 to 300             40              40
+ *      >100 to 200             55              55
+ *      >70 to 100              65              65
+ *      >50 to 70               75              75
+ *      >20 to 50               85              85
+ *      >10 to 20               95              95
+ *      >5 to 10                110             110
+ *      >1 to 5                 130             130
+ *      >0 to 1                 167             167
+ *      <=0                                     SOLID ON
+ */
+static const struct ieee80211_tpt_blink iwl_blink[] = {
+        { .throughput = 0, .blink_time = 334 },
+        { .throughput = 1 * 1024 - 1, .blink_time = 260 },
+        { .throughput = 5 * 1024 - 1, .blink_time = 220 },
+        { .throughput = 10 * 1024 - 1, .blink_time = 190 },
+        { .throughput = 20 * 1024 - 1, .blink_time = 170 },
+        { .throughput = 50 * 1024 - 1, .blink_time = 150 },
+        { .throughput = 70 * 1024 - 1, .blink_time = 130 },
+        { .throughput = 100 * 1024 - 1, .blink_time = 110 },
+        { .throughput = 200 * 1024 - 1, .blink_time = 80 },
+        { .throughput = 300 * 1024 - 1, .blink_time = 50 },
+};
+
+/* Set led register off */
+void iwlagn_led_enable(struct iwl_priv *priv)
+{
+        iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
+}
+
+/*
+ * Adjust led blink rate to compensate on a MAC Clock difference on every HW
+ * Led blink rate analysis showed an average deviation of 20% on 5000 series
+ * and up.
+ * Need to compensate on the led on/off time per HW according to the deviation
+ * to achieve the desired led frequency
+ * The calculation is: (100-averageDeviation)/100 * blinkTime
+ * For code efficiency the calculation will be:
+ *     compensation = (100 - averageDeviation) * 64 / 100
+ *     NewBlinkTime = (compensation * BlinkTime) / 64
+ */
+static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
+                                    u8 time, u16 compensation)
+{
+        if (!compensation) {
+                IWL_ERR(priv, "undefined blink compensation: "
+                        "use pre-defined blinking time\n");
+                return time;
+        }
+
+        return (u8)((time * compensation) >> 6);
+}
+
+static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
+{
+        struct iwl_host_cmd cmd = {
+                .id = REPLY_LEDS_CMD,
+                .len = { sizeof(struct iwl_led_cmd), },
+                .data = { led_cmd, },
+                .flags = CMD_ASYNC,
+                .callback = NULL,
+        };
+        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 trans_send_cmd(&priv->trans, &cmd);
+}
+
+/* Set led pattern command */
+static int iwl_led_cmd(struct iwl_priv *priv,
+                       unsigned long on,
+                       unsigned long off)
+{
+        struct iwl_led_cmd led_cmd = {
+                .id = IWL_LED_LINK,
+                .interval = IWL_DEF_LED_INTRVL
+        };
+        int ret;
+
+        if (!test_bit(STATUS_READY, &priv->status))
+                return -EBUSY;
+
+        if (priv->blink_on == on && priv->blink_off == off)
+                return 0;
+
+        if (off == 0) {
+                /* led is SOLID_ON */
+                on = IWL_LED_SOLID;
+        }
+
+        IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n",
+                        priv->cfg->base_params->led_compensation);
+        led_cmd.on = iwl_blink_compensation(priv, on,
+                                priv->cfg->base_params->led_compensation);
+        led_cmd.off = iwl_blink_compensation(priv, off,
+                                priv->cfg->base_params->led_compensation);
+
+        ret = iwl_send_led_cmd(priv, &led_cmd);
+        if (!ret) {
+                priv->blink_on = on;
+                priv->blink_off = off;
+        }
+        return ret;
+}
+
+static void iwl_led_brightness_set(struct led_classdev *led_cdev,
+                                   enum led_brightness brightness)
+{
+        struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
+        unsigned long on = 0;
+
+        if (brightness > 0)
+                on = IWL_LED_SOLID;
+
+        iwl_led_cmd(priv, on, 0);
+}
+
+static int iwl_led_blink_set(struct led_classdev *led_cdev,
+                             unsigned long *delay_on,
+                             unsigned long *delay_off)
+{
+        struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
+
+        return iwl_led_cmd(priv, *delay_on, *delay_off);
+}
+
+void iwl_leds_init(struct iwl_priv *priv)
+{
+        int mode = iwlagn_mod_params.led_mode;
+        int ret;
+
+        if (mode == IWL_LED_DEFAULT)
+                mode = priv->cfg->led_mode;
+
+        priv->led.name = kasprintf(GFP_KERNEL, "%s-led",
+                                   wiphy_name(priv->hw->wiphy));
+        priv->led.brightness_set = iwl_led_brightness_set;
+        priv->led.blink_set = iwl_led_blink_set;
+        priv->led.max_brightness = 1;
+
+        switch (mode) {
+        case IWL_LED_DEFAULT:
+                WARN_ON(1);
+                break;
+        case IWL_LED_BLINK:
+                priv->led.default_trigger =
+                        ieee80211_create_tpt_led_trigger(priv->hw,
+                                        IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
+                                        iwl_blink, ARRAY_SIZE(iwl_blink));
+                break;
+        case IWL_LED_RF_STATE:
+                priv->led.default_trigger =
+                        ieee80211_get_radio_led_name(priv->hw);
+                break;
+        }
+
+        ret = led_classdev_register(priv->bus->dev,
+                                    &priv->led);
+        if (ret) {
+                kfree(priv->led.name);
+                return;
+        }
+
+        priv->led_registered = true;
+}
+
+void iwl_leds_exit(struct iwl_priv *priv)
+{
+        if (!priv->led_registered)
+                return;
+
+        led_classdev_unregister(&priv->led);
+        kfree(priv->led.name);
+}