1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 *
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.
8 *
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
12 * more details.
13 *
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
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/delay.h>
31 #include <linux/skbuff.h>
32 #include <linux/netdevice.h>
33 #include <net/mac80211.h>
34 #include <linux/etherdevice.h>
35 #include <asm/unaligned.h>
36 #include "iwl-io.h"
37 #include "iwl-trans.h"
38 #include "iwl-modparams.h"
39 #include "dev.h"
40 #include "agn.h"
41
42 /* Throughput OFF time(ms) ON time (ms)
43 * >300 25 25
44 * >200 to 300 40 40
45 * >100 to 200 55 55
46 * >70 to 100 65 65
47 * >50 to 70 75 75
48 * >20 to 50 85 85
49 * >10 to 20 95 95
50 * >5 to 10 110 110
51 * >1 to 5 130 130
52 * >0 to 1 167 167
53 * <=0 SOLID ON
54 */
55 static const struct ieee80211_tpt_blink iwl_blink[] = {
56 { .throughput = 0, .blink_time = 334 },
57 { .throughput = 1 * 1024 - 1, .blink_time = 260 },
58 { .throughput = 5 * 1024 - 1, .blink_time = 220 },
59 { .throughput = 10 * 1024 - 1, .blink_time = 190 },
60 { .throughput = 20 * 1024 - 1, .blink_time = 170 },
61 { .throughput = 50 * 1024 - 1, .blink_time = 150 },
62 { .throughput = 70 * 1024 - 1, .blink_time = 130 },
63 { .throughput = 100 * 1024 - 1, .blink_time = 110 },
64 { .throughput = 200 * 1024 - 1, .blink_time = 80 },
65 { .throughput = 300 * 1024 - 1, .blink_time = 50 },
66 };
67
68 /* Set led register off */
iwlagn_led_enable(struct iwl_priv * priv)69 void iwlagn_led_enable(struct iwl_priv *priv)
70 {
71 iwl_write32(priv->trans, CSR_LED_REG, CSR_LED_REG_TURN_ON);
72 }
73
74 /*
75 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
76 * Led blink rate analysis showed an average deviation of 20% on 5000 series
77 * and up.
78 * Need to compensate on the led on/off time per HW according to the deviation
79 * to achieve the desired led frequency
80 * The calculation is: (100-averageDeviation)/100 * blinkTime
81 * For code efficiency the calculation will be:
82 * compensation = (100 - averageDeviation) * 64 / 100
83 * NewBlinkTime = (compensation * BlinkTime) / 64
84 */
iwl_blink_compensation(struct iwl_priv * priv,u8 time,u16 compensation)85 static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
86 u8 time, u16 compensation)
87 {
88 if (!compensation) {
89 IWL_ERR(priv, "undefined blink compensation: "
90 "use pre-defined blinking time\n");
91 return time;
92 }
93
94 return (u8)((time * compensation) >> 6);
95 }
96
iwl_send_led_cmd(struct iwl_priv * priv,struct iwl_led_cmd * led_cmd)97 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
98 {
99 struct iwl_host_cmd cmd = {
100 .id = REPLY_LEDS_CMD,
101 .len = { sizeof(struct iwl_led_cmd), },
102 .data = { led_cmd, },
103 .flags = CMD_ASYNC,
104 };
105 u32 reg;
106
107 reg = iwl_read32(priv->trans, CSR_LED_REG);
108 if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
109 iwl_write32(priv->trans, CSR_LED_REG,
110 reg & CSR_LED_BSM_CTRL_MSK);
111
112 return iwl_dvm_send_cmd(priv, &cmd);
113 }
114
115 /* Set led pattern command */
iwl_led_cmd(struct iwl_priv * priv,unsigned long on,unsigned long off)116 static int iwl_led_cmd(struct iwl_priv *priv,
117 unsigned long on,
118 unsigned long off)
119 {
120 struct iwl_led_cmd led_cmd = {
121 .id = IWL_LED_LINK,
122 .interval = IWL_DEF_LED_INTRVL
123 };
124 int ret;
125
126 if (!test_bit(STATUS_READY, &priv->status))
127 return -EBUSY;
128
129 if (priv->blink_on == on && priv->blink_off == off)
130 return 0;
131
132 if (off == 0) {
133 /* led is SOLID_ON */
134 on = IWL_LED_SOLID;
135 }
136
137 IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n",
138 priv->cfg->base_params->led_compensation);
139 led_cmd.on = iwl_blink_compensation(priv, on,
140 priv->cfg->base_params->led_compensation);
141 led_cmd.off = iwl_blink_compensation(priv, off,
142 priv->cfg->base_params->led_compensation);
143
144 ret = iwl_send_led_cmd(priv, &led_cmd);
145 if (!ret) {
146 priv->blink_on = on;
147 priv->blink_off = off;
148 }
149 return ret;
150 }
151
iwl_led_brightness_set(struct led_classdev * led_cdev,enum led_brightness brightness)152 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
153 enum led_brightness brightness)
154 {
155 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
156 unsigned long on = 0;
157
158 if (brightness > 0)
159 on = IWL_LED_SOLID;
160
161 iwl_led_cmd(priv, on, 0);
162 }
163
iwl_led_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)164 static int iwl_led_blink_set(struct led_classdev *led_cdev,
165 unsigned long *delay_on,
166 unsigned long *delay_off)
167 {
168 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
169
170 return iwl_led_cmd(priv, *delay_on, *delay_off);
171 }
172
iwl_leds_init(struct iwl_priv * priv)173 void iwl_leds_init(struct iwl_priv *priv)
174 {
175 int mode = iwlwifi_mod_params.led_mode;
176 int ret;
177
178 if (mode == IWL_LED_DISABLE) {
179 IWL_INFO(priv, "Led disabled\n");
180 return;
181 }
182 if (mode == IWL_LED_DEFAULT)
183 mode = priv->cfg->led_mode;
184
185 priv->led.name = kasprintf(GFP_KERNEL, "%s-led",
186 wiphy_name(priv->hw->wiphy));
187 if (!priv->led.name)
188 return;
189
190 priv->led.brightness_set = iwl_led_brightness_set;
191 priv->led.blink_set = iwl_led_blink_set;
192 priv->led.max_brightness = 1;
193
194 switch (mode) {
195 case IWL_LED_DEFAULT:
196 WARN_ON(1);
197 break;
198 case IWL_LED_BLINK:
199 priv->led.default_trigger =
200 ieee80211_create_tpt_led_trigger(priv->hw,
201 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
202 iwl_blink, ARRAY_SIZE(iwl_blink));
203 break;
204 case IWL_LED_RF_STATE:
205 priv->led.default_trigger =
206 ieee80211_get_radio_led_name(priv->hw);
207 break;
208 }
209
210 ret = led_classdev_register(priv->trans->dev, &priv->led);
211 if (ret) {
212 kfree(priv->led.name);
213 return;
214 }
215
216 priv->led_registered = true;
217 }
218
iwl_leds_exit(struct iwl_priv * priv)219 void iwl_leds_exit(struct iwl_priv *priv)
220 {
221 if (!priv->led_registered)
222 return;
223
224 led_classdev_unregister(&priv->led);
225 kfree(priv->led.name);
226 }
227