1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/******************************************************************************
*
* Copyright(c) 2003 - 2010 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/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-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
/* default: IWL_LED_BLINK(0) using blinking index table */
static int led_mode;
module_param(led_mode, int, S_IRUGO);
MODULE_PARM_DESC(led_mode, "led mode: 0=blinking, 1=On(RF On)/Off(RF Off), "
"(default 0)");
static const struct {
u16 tpt; /* Mb/s */
u8 on_time;
u8 off_time;
} blink_tbl[] =
{
{300, 25, 25},
{200, 40, 40},
{100, 55, 55},
{70, 65, 65},
{50, 75, 75},
{20, 85, 85},
{10, 95, 95},
{5, 110, 110},
{1, 130, 130},
{0, 167, 167},
/* SOLID_ON */
{-1, IWL_LED_SOLID, 0}
};
#define IWL_1MB_RATE (128 * 1024)
#define IWL_LED_THRESHOLD (16)
#define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
#define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
/*
* Adjust led blink rate to compensate on a MAC Clock difference on every HW
* Led blink rate analysis showed an average deviation of 0% on 3945,
* 5% on 4965 HW and 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);
}
/* Set led pattern command */
static int iwl_led_pattern(struct iwl_priv *priv, unsigned int idx)
{
struct iwl_led_cmd led_cmd = {
.id = IWL_LED_LINK,
.interval = IWL_DEF_LED_INTRVL
};
BUG_ON(idx > IWL_MAX_BLINK_TBL);
IWL_DEBUG_LED(priv, "Led blink time compensation= %u\n",
priv->cfg->led_compensation);
led_cmd.on =
iwl_blink_compensation(priv, blink_tbl[idx].on_time,
priv->cfg->led_compensation);
led_cmd.off =
iwl_blink_compensation(priv, blink_tbl[idx].off_time,
priv->cfg->led_compensation);
return priv->cfg->ops->led->cmd(priv, &led_cmd);
}
int iwl_led_start(struct iwl_priv *priv)
{
return priv->cfg->ops->led->on(priv);
}
EXPORT_SYMBOL(iwl_led_start);
int iwl_led_associate(struct iwl_priv *priv)
{
IWL_DEBUG_LED(priv, "Associated\n");
if (led_mode == IWL_LED_BLINK)
priv->allow_blinking = 1;
priv->last_blink_time = jiffies;
return 0;
}
int iwl_led_disassociate(struct iwl_priv *priv)
{
priv->allow_blinking = 0;
return 0;
}
/*
* calculate blink rate according to last second Tx/Rx activities
*/
static int iwl_get_blink_rate(struct iwl_priv *priv)
{
int i;
/* count both tx and rx traffic to be able to
* handle traffic in either direction
*/
u64 current_tpt = priv->tx_stats.data_bytes +
priv->rx_stats.data_bytes;
s64 tpt = current_tpt - priv->led_tpt;
if (tpt < 0) /* wraparound */
tpt = -tpt;
IWL_DEBUG_LED(priv, "tpt %lld current_tpt %llu\n",
(long long)tpt,
(unsigned long long)current_tpt);
priv->led_tpt = current_tpt;
if (!priv->allow_blinking)
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;
IWL_DEBUG_LED(priv, "LED BLINK IDX=%d\n", i);
return i;
}
/*
* 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_idx;
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
priv->last_blink_time = 0;
return;
}
if (iwl_is_rfkill(priv)) {
priv->last_blink_time = 0;
return;
}
if (!priv->allow_blinking) {
priv->last_blink_time = 0;
if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
iwl_led_pattern(priv, IWL_SOLID_BLINK_IDX);
}
return;
}
if (!priv->last_blink_time ||
!time_after(jiffies, priv->last_blink_time +
msecs_to_jiffies(1000)))
return;
blink_idx = iwl_get_blink_rate(priv);
/* call only if blink rate change */
if (blink_idx != priv->last_blink_rate)
iwl_led_pattern(priv, blink_idx);
priv->last_blink_time = jiffies;
priv->last_blink_rate = blink_idx;
}
EXPORT_SYMBOL(iwl_leds_background);
void iwl_leds_init(struct iwl_priv *priv)
{
priv->last_blink_rate = 0;
priv->last_blink_time = 0;
priv->allow_blinking = 0;
}
EXPORT_SYMBOL(iwl_leds_init);
|
