1 /******************************************************************************
3 * Copyright(c) 2003 - 2008 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 * James P. Ketrenos <ipw2100-admin@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/version.h>
31 #include <linux/init.h>
32 #include <linux/pci.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/delay.h>
35 #include <linux/skbuff.h>
36 #include <linux/netdevice.h>
37 #include <linux/wireless.h>
38 #include <net/mac80211.h>
39 #include <linux/etherdevice.h>
40 #include <asm/unaligned.h>
45 #include "iwl-helpers.h"
47 #ifdef CONFIG_IWLWIFI_DEBUG
48 static const char *led_type_str[] = {
49 __stringify(IWL_LED_TRG_TX),
50 __stringify(IWL_LED_TRG_RX),
51 __stringify(IWL_LED_TRG_ASSOC),
52 __stringify(IWL_LED_TRG_RADIO),
55 #endif /* CONFIG_IWLWIFI_DEBUG */
75 {-1, IWL_LED_SOLID, 0}
78 #define IWL_1MB_RATE (128 * 1024)
79 #define IWL_LED_THRESHOLD (16)
80 #define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
81 #define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)
83 /* [0-256] -> [0..8] FIXME: we need [0..10] */
84 static inline int iwl_brightness_to_idx(enum led_brightness brightness)
86 return fls(0x000000FF & (u32)brightness);
89 /* Send led command */
90 static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
92 struct iwl_host_cmd cmd = {
94 .len = sizeof(struct iwl_led_cmd),
96 .meta.flags = CMD_ASYNC,
97 .meta.u.callback = NULL,
101 reg = iwl_read32(priv, CSR_LED_REG);
102 if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
103 iwl_write32(priv, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK);
105 return iwl_send_cmd(priv, &cmd);
108 /* Set led pattern command */
109 static int iwl4965_led_pattern(struct iwl_priv *priv, int led_id, int idx)
111 struct iwl_led_cmd led_cmd = {
113 .interval = IWL_DEF_LED_INTRVL
116 BUG_ON(idx > IWL_MAX_BLINK_TBL);
118 led_cmd.on = blink_tbl[idx].on_time;
119 led_cmd.off = blink_tbl[idx].off_time;
121 return iwl_send_led_cmd(priv, &led_cmd);
124 /* Set led register off */
125 static int iwl4965_led_on_reg(struct iwl_priv *priv, int led_id)
127 IWL_DEBUG_LED("led on %d\n", led_id);
128 iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
133 /* Set led on command */
134 static int iwl4965_led_on(struct iwl_priv *priv, int led_id)
136 struct iwl_led_cmd led_cmd = {
140 .interval = IWL_DEF_LED_INTRVL
142 return iwl_send_led_cmd(priv, &led_cmd);
145 /* Set led off command */
146 int iwl4965_led_off(struct iwl_priv *priv, int led_id)
148 struct iwl_led_cmd led_cmd = {
152 .interval = IWL_DEF_LED_INTRVL
154 IWL_DEBUG_LED("led off %d\n", led_id);
155 return iwl_send_led_cmd(priv, &led_cmd);
160 /* Set led register off */
161 static int iwl4965_led_off_reg(struct iwl_priv *priv, int led_id)
163 IWL_DEBUG_LED("radio off\n");
164 iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_OFF);
169 * brightness call back function for Tx/Rx LED
171 static int iwl_led_associated(struct iwl_priv *priv, int led_id)
173 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
174 !test_bit(STATUS_READY, &priv->status))
178 /* start counting Tx/Rx bytes */
179 if (!priv->last_blink_time && priv->allow_blinking)
180 priv->last_blink_time = jiffies;
185 * brightness call back for association and radio
187 static void iwl_led_brightness_set(struct led_classdev *led_cdev,
188 enum led_brightness brightness)
190 struct iwl_led *led = container_of(led_cdev, struct iwl_led, led_dev);
191 struct iwl_priv *priv = led->priv;
193 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
197 IWL_DEBUG_LED("Led type = %s brightness = %d\n",
198 led_type_str[led->type], brightness);
199 switch (brightness) {
201 if (led->type == IWL_LED_TRG_ASSOC)
202 priv->allow_blinking = 1;
205 led->led_on(priv, IWL_LED_LINK);
208 if (led->type == IWL_LED_TRG_ASSOC)
209 priv->allow_blinking = 0;
212 led->led_off(priv, IWL_LED_LINK);
215 if (led->led_pattern) {
216 int idx = iwl_brightness_to_idx(brightness);
217 led->led_pattern(priv, IWL_LED_LINK, idx);
226 * Register led class with the system
228 static int iwl_leds_register_led(struct iwl_priv *priv, struct iwl_led *led,
229 enum led_type type, u8 set_led,
230 const char *name, char *trigger)
232 struct device *device = wiphy_dev(priv->hw->wiphy);
235 led->led_dev.name = name;
236 led->led_dev.brightness_set = iwl_led_brightness_set;
237 led->led_dev.default_trigger = trigger;
242 ret = led_classdev_register(device, &led->led_dev);
244 IWL_ERROR("Error: failed to register led handler.\n");
250 if (set_led && led->led_on)
251 led->led_on(priv, IWL_LED_LINK);
258 * calculate blink rate according to last 2 sec Tx/Rx activities
260 static int iwl_get_blink_rate(struct iwl_priv *priv)
263 u64 current_tpt = priv->tx_stats[2].bytes;
264 /* FIXME: + priv->rx_stats[2].bytes; */
265 s64 tpt = current_tpt - priv->led_tpt;
267 if (tpt < 0) /* wrapparound */
270 IWL_DEBUG_LED("tpt %lld current_tpt %lld\n", tpt, current_tpt);
271 priv->led_tpt = current_tpt;
273 if (!priv->allow_blinking)
274 i = IWL_MAX_BLINK_TBL;
276 for (i = 0; i < IWL_MAX_BLINK_TBL; i++)
277 if (tpt > (blink_tbl[i].tpt * IWL_1MB_RATE))
280 IWL_DEBUG_LED("LED BLINK IDX=%d", i);
284 static inline int is_rf_kill(struct iwl_priv *priv)
286 return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
287 test_bit(STATUS_RF_KILL_SW, &priv->status);
291 * this function called from handler. Since setting Led command can
292 * happen very frequent we postpone led command to be called from
293 * REPLY handler so we know ucode is up
295 void iwl_leds_background(struct iwl_priv *priv)
299 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
300 priv->last_blink_time = 0;
303 if (is_rf_kill(priv)) {
304 priv->last_blink_time = 0;
308 if (!priv->allow_blinking) {
309 priv->last_blink_time = 0;
310 if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
311 priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
312 iwl4965_led_pattern(priv, IWL_LED_LINK,
313 IWL_SOLID_BLINK_IDX);
317 if (!priv->last_blink_time ||
318 !time_after(jiffies, priv->last_blink_time +
319 msecs_to_jiffies(1000)))
322 blink_idx = iwl_get_blink_rate(priv);
324 /* call only if blink rate change */
325 if (blink_idx != priv->last_blink_rate)
326 iwl4965_led_pattern(priv, IWL_LED_LINK, blink_idx);
328 priv->last_blink_time = jiffies;
329 priv->last_blink_rate = blink_idx;
331 EXPORT_SYMBOL(iwl_leds_background);
333 /* Register all led handler */
334 int iwl_leds_register(struct iwl_priv *priv)
340 priv->last_blink_rate = 0;
342 priv->last_blink_time = 0;
343 priv->allow_blinking = 0;
345 trigger = ieee80211_get_radio_led_name(priv->hw);
346 snprintf(name, sizeof(name), "iwl-%s:radio",
347 wiphy_name(priv->hw->wiphy));
349 priv->led[IWL_LED_TRG_RADIO].led_on = iwl4965_led_on_reg;
350 priv->led[IWL_LED_TRG_RADIO].led_off = iwl4965_led_off_reg;
351 priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;
353 ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RADIO],
354 IWL_LED_TRG_RADIO, 1, name, trigger);
358 trigger = ieee80211_get_assoc_led_name(priv->hw);
359 snprintf(name, sizeof(name), "iwl-%s:assoc",
360 wiphy_name(priv->hw->wiphy));
362 ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_ASSOC],
363 IWL_LED_TRG_ASSOC, 0, name, trigger);
365 /* for assoc always turn led on */
366 priv->led[IWL_LED_TRG_ASSOC].led_on = iwl4965_led_on_reg;
367 priv->led[IWL_LED_TRG_ASSOC].led_off = iwl4965_led_on_reg;
368 priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;
373 trigger = ieee80211_get_rx_led_name(priv->hw);
374 snprintf(name, sizeof(name), "iwl-%s:RX", wiphy_name(priv->hw->wiphy));
377 ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RX],
378 IWL_LED_TRG_RX, 0, name, trigger);
380 priv->led[IWL_LED_TRG_RX].led_on = iwl_led_associated;
381 priv->led[IWL_LED_TRG_RX].led_off = iwl_led_associated;
382 priv->led[IWL_LED_TRG_RX].led_pattern = iwl4965_led_pattern;
387 trigger = ieee80211_get_tx_led_name(priv->hw);
388 snprintf(name, sizeof(name), "iwl-%s:TX", wiphy_name(priv->hw->wiphy));
389 ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_TX],
390 IWL_LED_TRG_TX, 0, name, trigger);
392 priv->led[IWL_LED_TRG_TX].led_on = iwl_led_associated;
393 priv->led[IWL_LED_TRG_TX].led_off = iwl_led_associated;
394 priv->led[IWL_LED_TRG_TX].led_pattern = iwl4965_led_pattern;
402 iwl_leds_unregister(priv);
405 EXPORT_SYMBOL(iwl_leds_register);
407 /* unregister led class */
408 static void iwl_leds_unregister_led(struct iwl_led *led, u8 set_led)
410 if (!led->registered)
413 led_classdev_unregister(&led->led_dev);
416 led->led_dev.brightness_set(&led->led_dev, LED_OFF);
420 /* Unregister all led handlers */
421 void iwl_leds_unregister(struct iwl_priv *priv)
423 iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
424 iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
425 iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
426 iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
428 EXPORT_SYMBOL(iwl_leds_unregister);