1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 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/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>
37
38 #include "iwl-dev.h"
39 #include "iwl-core.h"
40 #include "iwl-agn.h"
41 #include "iwl-io.h"
42 #include "iwl-trans.h"
43 #include "iwl-shared.h"
44
45 /* Throughput OFF time(ms) ON time (ms)
46 * >300 25 25
47 * >200 to 300 40 40
48 * >100 to 200 55 55
49 * >70 to 100 65 65
50 * >50 to 70 75 75
51 * >20 to 50 85 85
52 * >10 to 20 95 95
53 * >5 to 10 110 110
54 * >1 to 5 130 130
55 * >0 to 1 167 167
56 * <=0 SOLID ON
57 */
58 static const struct ieee80211_tpt_blink iwl_blink[] = {
59 { .throughput = 0, .blink_time = 334 },
60 { .throughput = 1 * 1024 - 1, .blink_time = 260 },
61 { .throughput = 5 * 1024 - 1, .blink_time = 220 },
62 { .throughput = 10 * 1024 - 1, .blink_time = 190 },
63 { .throughput = 20 * 1024 - 1, .blink_time = 170 },
64 { .throughput = 50 * 1024 - 1, .blink_time = 150 },
65 { .throughput = 70 * 1024 - 1, .blink_time = 130 },
66 { .throughput = 100 * 1024 - 1, .blink_time = 110 },
67 { .throughput = 200 * 1024 - 1, .blink_time = 80 },
68 { .throughput = 300 * 1024 - 1, .blink_time = 50 },
69 };
70
71 /* Set led register off */
iwlagn_led_enable(struct iwl_priv * priv)72 void iwlagn_led_enable(struct iwl_priv *priv)
73 {
74 iwl_write32(trans(priv), CSR_LED_REG, CSR_LED_REG_TRUN_ON);
75 }
76
77 /*
78 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
79 * Led blink rate analysis showed an average deviation of 20% on 5000 series
80 * and up.
81 * Need to compensate on the led on/off time per HW according to the deviation
82 * to achieve the desired led frequency
83 * The calculation is: (100-averageDeviation)/100 * blinkTime
84 * For code efficiency the calculation will be:
85 * compensation = (100 - averageDeviation) * 64 / 100
86 * NewBlinkTime = (compensation * BlinkTime) / 64
87 */
iwl_blink_compensation(struct iwl_priv * priv,u8 time,u16 compensation)88 static inline u8 iwl_blink_compensation(struct iwl_priv *priv,
89 u8 time, u16 compensation)
90 {
91 if (!compensation) {
92 IWL_ERR(priv, "undefined blink compensation: "
93 "use pre-defined blinking time\n");
94 return time;
95 }
96
97 return (u8)((time * compensation) >> 6);
98 }
99
iwl_send_led_cmd(struct iwl_priv * priv,struct iwl_led_cmd * led_cmd)100 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
101 {
102 struct iwl_host_cmd cmd = {
103 .id = REPLY_LEDS_CMD,
104 .len = { sizeof(struct iwl_led_cmd), },
105 .data = { led_cmd, },
106 .flags = CMD_ASYNC,
107 };
108 u32 reg;
109
110 reg = iwl_read32(trans(priv), CSR_LED_REG);
111 if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
112 iwl_write32(trans(priv), CSR_LED_REG,
113 reg & CSR_LED_BSM_CTRL_MSK);
114
115 return iwl_dvm_send_cmd(priv, &cmd);
116 }
117
118 /* Set led pattern command */
iwl_led_cmd(struct iwl_priv * priv,unsigned long on,unsigned long off)119 static int iwl_led_cmd(struct iwl_priv *priv,
120 unsigned long on,
121 unsigned long off)
122 {
123 struct iwl_led_cmd led_cmd = {
124 .id = IWL_LED_LINK,
125 .interval = IWL_DEF_LED_INTRVL
126 };
127 int ret;
128
129 if (!test_bit(STATUS_READY, &priv->status))
130 return -EBUSY;
131
132 if (priv->blink_on == on && priv->blink_off == off)
133 return 0;
134
135 if (off == 0) {
136 /* led is SOLID_ON */
137 on = IWL_LED_SOLID;
138 }
139
140 IWL_DEBUG_LED(priv, "Led blink time compensation=%u\n",
141 cfg(priv)->base_params->led_compensation);
142 led_cmd.on = iwl_blink_compensation(priv, on,
143 cfg(priv)->base_params->led_compensation);
144 led_cmd.off = iwl_blink_compensation(priv, off,
145 cfg(priv)->base_params->led_compensation);
146
147 ret = iwl_send_led_cmd(priv, &led_cmd);
148 if (!ret) {
149 priv->blink_on = on;
150 priv->blink_off = off;
151 }
152 return ret;
153 }
154
iwl_led_brightness_set(struct led_classdev * led_cdev,enum led_brightness brightness)155 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
156 enum led_brightness brightness)
157 {
158 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
159 unsigned long on = 0;
160
161 if (brightness > 0)
162 on = IWL_LED_SOLID;
163
164 iwl_led_cmd(priv, on, 0);
165 }
166
iwl_led_blink_set(struct led_classdev * led_cdev,unsigned long * delay_on,unsigned long * delay_off)167 static int iwl_led_blink_set(struct led_classdev *led_cdev,
168 unsigned long *delay_on,
169 unsigned long *delay_off)
170 {
171 struct iwl_priv *priv = container_of(led_cdev, struct iwl_priv, led);
172
173 return iwl_led_cmd(priv, *delay_on, *delay_off);
174 }
175
iwl_leds_init(struct iwl_priv * priv)176 void iwl_leds_init(struct iwl_priv *priv)
177 {
178 int mode = iwlagn_mod_params.led_mode;
179 int ret;
180
181 if (mode == IWL_LED_DISABLE) {
182 IWL_INFO(priv, "Led disabled\n");
183 return;
184 }
185 if (mode == IWL_LED_DEFAULT)
186 mode = cfg(priv)->led_mode;
187
188 priv->led.name = kasprintf(GFP_KERNEL, "%s-led",
189 wiphy_name(priv->hw->wiphy));
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(trans(priv)->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