1 /******************************************************************************
3 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/delay.h>
32 #include <linux/skbuff.h>
33 #include <linux/netdevice.h>
34 #include <net/mac80211.h>
35 #include <linux/etherdevice.h>
36 #include <asm/unaligned.h>
41 #include "iwl-trans.h"
42 #include "iwl-modparams.h"
44 /* Throughput OFF time(ms) ON time (ms)
57 static const struct ieee80211_tpt_blink iwl_blink[] = {
58 { .throughput = 0, .blink_time = 334 },
59 { .throughput = 1 * 1024 - 1, .blink_time = 260 },
60 { .throughput = 5 * 1024 - 1, .blink_time = 220 },
61 { .throughput = 10 * 1024 - 1, .blink_time = 190 },
62 { .throughput = 20 * 1024 - 1, .blink_time = 170 },
63 { .throughput = 50 * 1024 - 1, .blink_time = 150 },
64 { .throughput = 70 * 1024 - 1, .blink_time = 130 },
65 { .throughput = 100 * 1024 - 1, .blink_time = 110 },
66 { .throughput = 200 * 1024 - 1, .blink_time = 80 },
67 { .throughput = 300 * 1024 - 1, .blink_time = 50 },
70 /* Set led register off */
71 void iwlagn_led_enable(struct iwl_priv *priv)
73 iwl_write32(priv->trans, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
77 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
78 * Led blink rate analysis showed an average deviation of 20% on 5000 series
80 * Need to compensate on the led on/off time per HW according to the deviation
81 * to achieve the desired led frequency
82 * The calculation is: (100-averageDeviation)/100 * blinkTime
83 * For code efficiency the calculation will be:
84 * compensation = (100 - averageDeviation) * 64 / 100
85 * NewBlinkTime = (compensation * BlinkTime) / 64
87 static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
88 u8 time, u16 compensation)
91 IWL_ERR(priv, "undefined blink compensation: "
92 "use pre-defined blinking time\n");
96 return (u8)((time * compensation) >> 6);
99 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
101 struct iwl_host_cmd cmd = {
102 .id = REPLY_LEDS_CMD,
103 .len = { sizeof(struct iwl_led_cmd), },
104 .data = { led_cmd, },
109 reg = iwl_read32(priv->trans, CSR_LED_REG);
110 if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
111 iwl_write32(priv->trans, CSR_LED_REG,
112 reg & CSR_LED_BSM_CTRL_MSK);
114 return iwl_dvm_send_cmd(priv, &cmd);
117 /* Set led pattern command */
118 static int iwl_led_cmd(struct iwl_priv *priv,
122 struct iwl_led_cmd led_cmd = {
124 .interval = IWL_DEF_LED_INTRVL
128 if (!test_bit(STATUS_READY, &priv->status))
131 if (priv->blink_on == on && priv->blink_off == off)
135 /* led is SOLID_ON */
139 IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n",
140 priv->cfg->base_params->led_compensation);
141 led_cmd.on = iwl_blink_compensation(priv, on,
142 priv->cfg->base_params->led_compensation);
143 led_cmd.off = iwl_blink_compensation(priv, off,
144 priv->cfg->base_params->led_compensation);
146 ret = iwl_send_led_cmd(priv, &led_cmd);
149 priv->blink_off = off;
154 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
155 enum led_brightness brightness)
157 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
158 unsigned long on = 0;
163 iwl_led_cmd(priv, on, 0);
166 static int iwl_led_blink_set(struct led_classdev *led_cdev,
167 unsigned long *delay_on,
168 unsigned long *delay_off)
170 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
172 return iwl_led_cmd(priv, *delay_on, *delay_off);
175 void iwl_leds_init(struct iwl_priv *priv)
177 int mode = iwlwifi_mod_params.led_mode;
180 if (mode == IWL_LED_DISABLE) {
181 IWL_INFO(priv, "Led disabled\n");
184 if (mode == IWL_LED_DEFAULT)
185 mode = priv->cfg->led_mode;
187 priv->led.name = kasprintf(GFP_KERNEL, "%s-led",
188 wiphy_name(priv->hw->wiphy));
189 priv->led.brightness_set = iwl_led_brightness_set;
190 priv->led.blink_set = iwl_led_blink_set;
191 priv->led.max_brightness = 1;
194 case IWL_LED_DEFAULT:
198 priv->led.default_trigger =
199 ieee80211_create_tpt_led_trigger(priv->hw,
200 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
201 iwl_blink, ARRAY_SIZE(iwl_blink));
203 case IWL_LED_RF_STATE:
204 priv->led.default_trigger =
205 ieee80211_get_radio_led_name(priv->hw);
209 ret = led_classdev_register(priv->trans->dev, &priv->led);
211 kfree(priv->led.name);
215 priv->led_registered = true;
218 void iwl_leds_exit(struct iwl_priv *priv)
220 if (!priv->led_registered)
223 led_classdev_unregister(&priv->led);
224 kfree(priv->led.name);