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 static const struct ieee80211_tpt_blink iwl_blink
[] = {
52 { .throughput
= 0 * 1024 - 1, .blink_time
= 334 },
53 { .throughput
= 1 * 1024 - 1, .blink_time
= 260 },
54 { .throughput
= 5 * 1024 - 1, .blink_time
= 220 },
55 { .throughput
= 10 * 1024 - 1, .blink_time
= 190 },
56 { .throughput
= 20 * 1024 - 1, .blink_time
= 170 },
57 { .throughput
= 50 * 1024 - 1, .blink_time
= 150 },
58 { .throughput
= 70 * 1024 - 1, .blink_time
= 130 },
59 { .throughput
= 100 * 1024 - 1, .blink_time
= 110 },
60 { .throughput
= 200 * 1024 - 1, .blink_time
= 80 },
61 { .throughput
= 300 * 1024 - 1, .blink_time
= 50 },
65 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
66 * Led blink rate analysis showed an average deviation of 0% on 3945,
68 * Need to compensate on the led on/off time per HW according to the deviation
69 * to achieve the desired led frequency
70 * The calculation is: (100-averageDeviation)/100 * blinkTime
71 * For code efficiency the calculation will be:
72 * compensation = (100 - averageDeviation) * 64 / 100
73 * NewBlinkTime = (compensation * BlinkTime) / 64
75 static inline u8
iwl_legacy_blink_compensation(struct iwl_priv
*priv
,
76 u8 time
, u16 compensation
)
79 IWL_ERR(priv
, "undefined blink compensation: "
80 "use pre-defined blinking time\n");
84 return (u8
)((time
* compensation
) >> 6);
87 /* Set led pattern command */
88 static int iwl_legacy_led_cmd(struct iwl_priv
*priv
,
92 struct iwl_led_cmd led_cmd
= {
94 .interval
= IWL_DEF_LED_INTRVL
98 if (!test_bit(STATUS_READY
, &priv
->status
))
101 if (priv
->blink_on
== on
&& priv
->blink_off
== off
)
104 IWL_DEBUG_LED(priv
, "Led blink time compensation=%u\n",
105 priv
->cfg
->base_params
->led_compensation
);
106 led_cmd
.on
= iwl_legacy_blink_compensation(priv
, on
,
107 priv
->cfg
->base_params
->led_compensation
);
108 led_cmd
.off
= iwl_legacy_blink_compensation(priv
, off
,
109 priv
->cfg
->base_params
->led_compensation
);
111 ret
= priv
->cfg
->ops
->led
->cmd(priv
, &led_cmd
);
114 priv
->blink_off
= off
;
119 static void iwl_legacy_led_brightness_set(struct led_classdev
*led_cdev
,
120 enum led_brightness brightness
)
122 struct iwl_priv
*priv
= container_of(led_cdev
, struct iwl_priv
, led
);
123 unsigned long on
= 0;
128 iwl_legacy_led_cmd(priv
, on
, 0);
131 static int iwl_legacy_led_blink_set(struct led_classdev
*led_cdev
,
132 unsigned long *delay_on
,
133 unsigned long *delay_off
)
135 struct iwl_priv
*priv
= container_of(led_cdev
, struct iwl_priv
, led
);
137 return iwl_legacy_led_cmd(priv
, *delay_on
, *delay_off
);
140 void iwl_legacy_leds_init(struct iwl_priv
*priv
)
145 if (mode
== IWL_LED_DEFAULT
)
146 mode
= priv
->cfg
->led_mode
;
148 priv
->led
.name
= kasprintf(GFP_KERNEL
, "%s-led",
149 wiphy_name(priv
->hw
->wiphy
));
150 priv
->led
.brightness_set
= iwl_legacy_led_brightness_set
;
151 priv
->led
.blink_set
= iwl_legacy_led_blink_set
;
152 priv
->led
.max_brightness
= 1;
155 case IWL_LED_DEFAULT
:
159 priv
->led
.default_trigger
=
160 ieee80211_create_tpt_led_trigger(priv
->hw
,
161 IEEE80211_TPT_LEDTRIG_FL_CONNECTED
,
162 iwl_blink
, ARRAY_SIZE(iwl_blink
));
164 case IWL_LED_RF_STATE
:
165 priv
->led
.default_trigger
=
166 ieee80211_get_radio_led_name(priv
->hw
);
170 ret
= led_classdev_register(&priv
->pci_dev
->dev
, &priv
->led
);
172 kfree(priv
->led
.name
);
176 priv
->led_registered
= true;
178 EXPORT_SYMBOL(iwl_legacy_leds_init
);
180 void iwl_legacy_leds_exit(struct iwl_priv
*priv
)
182 if (!priv
->led_registered
)
185 led_classdev_unregister(&priv
->led
);
186 kfree(priv
->led
.name
);
188 EXPORT_SYMBOL(iwl_legacy_leds_exit
);