1 /******************************************************************************
3 * Copyright(c) 2003 - 2011 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/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <linux/skbuff.h>
35 #include <linux/netdevice.h>
36 #include <linux/wireless.h>
37 #include <net/mac80211.h>
38 #include <linux/etherdevice.h>
39 #include <asm/unaligned.h>
45 /* default: IWL_LED_BLINK(0) using blinking index table */
47 module_param(led_mode, int, S_IRUGO);
48 MODULE_PARM_DESC(led_mode, "0=system default, "
49 "1=On(RF On)/Off(RF Off), 2=blinking");
51 /* Throughput OFF time(ms) ON time (ms)
64 static const struct ieee80211_tpt_blink iwl_blink[] = {
65 { .throughput = 0, .blink_time = 334 },
66 { .throughput = 1 * 1024 - 1, .blink_time = 260 },
67 { .throughput = 5 * 1024 - 1, .blink_time = 220 },
68 { .throughput = 10 * 1024 - 1, .blink_time = 190 },
69 { .throughput = 20 * 1024 - 1, .blink_time = 170 },
70 { .throughput = 50 * 1024 - 1, .blink_time = 150 },
71 { .throughput = 70 * 1024 - 1, .blink_time = 130 },
72 { .throughput = 100 * 1024 - 1, .blink_time = 110 },
73 { .throughput = 200 * 1024 - 1, .blink_time = 80 },
74 { .throughput = 300 * 1024 - 1, .blink_time = 50 },
77 /* Set led register off */
78 void iwlagn_led_enable(struct iwl_priv *priv)
80 iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
84 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
85 * Led blink rate analysis showed an average deviation of 20% on 5000 series
87 * Need to compensate on the led on/off time per HW according to the deviation
88 * to achieve the desired led frequency
89 * The calculation is: (100-averageDeviation)/100 * blinkTime
90 * For code efficiency the calculation will be:
91 * compensation = (100 - averageDeviation) * 64 / 100
92 * NewBlinkTime = (compensation * BlinkTime) / 64
94 static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
95 u8 time, u16 compensation)
98 IWL_ERR(priv, "undefined blink compensation: "
99 "use pre-defined blinking time\n");
103 return (u8)((time * compensation) >> 6);
106 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
108 struct iwl_host_cmd cmd = {
109 .id = REPLY_LEDS_CMD,
110 .len = sizeof(struct iwl_led_cmd),
117 reg = iwl_read32(priv, CSR_LED_REG);
118 if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
119 iwl_write32(priv, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK);
121 return iwl_send_cmd(priv, &cmd);
124 /* Set led pattern command */
125 static int iwl_led_cmd(struct iwl_priv *priv,
129 struct iwl_led_cmd led_cmd = {
131 .interval = IWL_DEF_LED_INTRVL
135 if (!test_bit(STATUS_READY, &priv->status))
138 if (priv->blink_on == on && priv->blink_off == off)
142 /* led is SOLID_ON */
146 IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n",
147 priv->cfg->base_params->led_compensation);
148 led_cmd.on = iwl_blink_compensation(priv, on,
149 priv->cfg->base_params->led_compensation);
150 led_cmd.off = iwl_blink_compensation(priv, off,
151 priv->cfg->base_params->led_compensation);
153 ret = iwl_send_led_cmd(priv, &led_cmd);
156 priv->blink_off = off;
161 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
162 enum led_brightness brightness)
164 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
165 unsigned long on = 0;
170 iwl_led_cmd(priv, on, 0);
173 static int iwl_led_blink_set(struct led_classdev *led_cdev,
174 unsigned long *delay_on,
175 unsigned long *delay_off)
177 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
179 return iwl_led_cmd(priv, *delay_on, *delay_off);
182 void iwl_leds_init(struct iwl_priv *priv)
187 if (mode == IWL_LED_DEFAULT)
188 mode = priv->cfg->led_mode;
190 priv->led.name = kasprintf(GFP_KERNEL, "%s-led",
191 wiphy_name(priv->hw->wiphy));
192 priv->led.brightness_set = iwl_led_brightness_set;
193 priv->led.blink_set = iwl_led_blink_set;
194 priv->led.max_brightness = 1;
197 case IWL_LED_DEFAULT:
201 priv->led.default_trigger =
202 ieee80211_create_tpt_led_trigger(priv->hw,
203 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
204 iwl_blink, ARRAY_SIZE(iwl_blink));
206 case IWL_LED_RF_STATE:
207 priv->led.default_trigger =
208 ieee80211_get_radio_led_name(priv->hw);
212 ret = led_classdev_register(&priv->pci_dev->dev, &priv->led);
214 kfree(priv->led.name);
218 priv->led_registered = true;
221 void iwl_leds_exit(struct iwl_priv *priv)
223 if (!priv->led_registered)
226 led_classdev_unregister(&priv->led);
227 kfree(priv->led.name);