2 * Copyright (C) 2012 ROCKCHIP, Inc.
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 /* Rock-chips rfkill driver for bluetooth
16 * BT Ô´ÂëÓÉÔÀ´µÄarch/arm/mach-rkxx/board-xxx-rfkill.cÒÆÖÁ´Ë´¦
17 * GPIOµÄÅäÖÃÔÚ arch/arm/mach-rkxx/board-rkxx-sdk.c µÄrfkill_rk_platdata½á¹¹ÌåÖÐ
19 * Çë¸ù¾Ýʵ¼ÊÇé¿öÅäÖúÃÀ¶ÑÀµÄ¸÷¸öGPIOÒý½Å£¬Òý½ÅÅäÖÃ˵Ã÷ÈçÏÂ:
21 .io = -1, // GPIOÖµ£¬ -1 ±íʾÎ޴˹¦ÄÜ
22 .enable = -1, // ʹÄÜ, GPIO_HIGH - ¸ßʹÄÜ£¬ GPIO_LOW - µÍʹÄÜ
24 .name = NULL, // IOMUXÃû³Æ£¬NULL ±íʾËüÊǵ¥¹¦ÄÜ£¬²»ÐèÒªmux
25 .fgpio = -1, // ÅäÖÃΪGPIOʱ£¬Ó¦ÉèÖõÄÖµ
26 .fmux = -1, // ÅäÖÃΪ¸´Óù¦ÄÜʱ£¬Ó¦ÉèÖõÄÖµ
31 #include <linux/kernel.h>
32 #include <linux/platform_device.h>
33 #include <linux/module.h>
34 #include <linux/rfkill.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
38 #include <mach/iomux.h>
39 #include <linux/delay.h>
40 #include <linux/rfkill-rk.h>
41 #include <linux/wakelock.h>
42 #include <linux/interrupt.h>
44 #include <linux/suspend.h>
47 #define DBG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
52 #define LOG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
54 #define BT_WAKEUP_TIMEOUT 3000
55 #define BT_IRQ_WAKELOCK_TIMEOUT 10*1000
57 #define BT_BLOCKED true
58 #define BT_UNBLOCK false
60 #define BT_WAKEUP false
68 #ifdef CONFIG_ARCH_RK29
69 #define rk_mux_api_set(name,mode) rk29_mux_api_set(name,mode)
70 #elif defined (CONFIG_ARCH_RK30)
71 #define rk_mux_api_set(name,mode) rk30_mux_api_set(name,mode)
73 #define rk_mux_api_set(name,mode) rk30_mux_api_set(name,mode)
76 // RK29+BCM4329, ÆäwifiÓëbtµÄpower¿ØÖƽÅÊǽÓÔÚÒ»ÆðµÄ
77 // ÔÚ¸øbtϵçʱ£¬ÐèÒªÏÈÅжÏwifi״̬
78 #if defined(CONFIG_BCM4329)
79 #define WIFI_BT_POWER_TOGGLE 1
80 extern int rk29sdk_bt_power_state;
81 extern int rk29sdk_wifi_power_state;
83 #define WIFI_BT_POWER_TOGGLE 0
86 struct rfkill_rk_data {
87 // Ö¸ÏòboardÖж¨ÒåµÄplatform data
88 struct rfkill_rk_platform_data *pdata;
90 // Ö¸ÏòrfkillÉ豸£¬ËüÓÉrfkill_alloc´´½¨
91 struct rfkill *rfkill_dev;
93 // ÔÚIRQÖжϺ¯ÊýÖÐʹÓã¬È·±£ÔÚBT»½ÐÑAPºó£¬²»»áÁ¢¼´
94 // µ÷ÓÃsuspend½øÈë˯Ãß
95 struct wake_lock bt_irq_wl;
97 // ÔÚ»½ÐÑBTºó£¬Í¨¹ý¸Ãdelay workÑÓʱһ¶Îʱ¼äºó½øÈë˯Ãß
98 // Èç¹ûdelay work»¹Î´Ö´ÐоÍÓÖÀ´Ò»´Î BT wake£¬Ôò»áÏÈcancel
99 // ÒÑÓÐµÄ delay work£¬²¢ÖØмÆʱ¡£
100 struct delayed_work bt_sleep_delay_work;
103 static struct rfkill_rk_data *g_rfkill = NULL;
105 static const char bt_name[] =
106 #if defined (CONFIG_BCM4330)
107 #if defined (CONFIG_BT_MODULE_NH660)
112 #elif defined (CONFIG_RK903)
113 #if defined(CONFIG_RKWIFI_26M)
118 #elif defined(CONFIG_BCM4329)
120 #elif defined(CONFIG_MV8787)
128 * rfkill_rk_wake_host_irq - BT_WAKE_HOST Öжϻص÷º¯Êý
129 * ÉêÇëÒ»¸öwakelock£¬ÒÔÈ·±£´Ë´Î»½ÐѲ»»áÂíÉϽáÊø
131 static irqreturn_t rfkill_rk_wake_host_irq(int irq, void *dev)
133 struct rfkill_rk_data *rfkill = dev;
134 LOG("BT_WAKE_HOST IRQ fired\n");
136 DBG("BT IRQ wakeup, request %dms wakelock\n", BT_IRQ_WAKELOCK_TIMEOUT);
138 wake_lock_timeout(&rfkill->bt_irq_wl,
139 msecs_to_jiffies(BT_IRQ_WAKELOCK_TIMEOUT));
145 * rfkill_rk_setup_gpio - ÉèÖÃGPIO
146 * gpio - ÒªÉèÖõÄGPIO
147 * mux - iomux ʲô¹¦ÄÜ
148 * prefix,name - ×é³É¸ÃIOµÄÃû³Æ
150 * ·µ»ØÖµÓë gpio_request Ïàͬ
152 static int rfkill_rk_setup_gpio(struct rfkill_rk_gpio* gpio, int mux, const char* prefix, const char* name)
154 if (gpio_is_valid(gpio->io)) {
156 sprintf(gpio->name, "%s_%s", prefix, name);
157 ret = gpio_request(gpio->io, gpio->name);
159 LOG("Failed to get %s gpio.\n", gpio->name);
162 if (gpio->iomux.name)
165 rk_mux_api_set(gpio->iomux.name, gpio->iomux.fgpio);
167 rk_mux_api_set(gpio->iomux.name, gpio->iomux.fmux);
176 // ÉèÖÃ BT_WAKE_HOST IRQ
177 static int rfkill_rk_setup_wake_irq(struct rfkill_rk_data* rfkill)
180 struct rfkill_rk_irq* irq = &(rfkill->pdata->wake_host_irq);
182 ret = rfkill_rk_setup_gpio(&irq->gpio, IOMUX_FGPIO, rfkill->pdata->name, "wake_host");
185 if (gpio_is_valid(irq->gpio.io))
187 ret = gpio_pull_updown(irq->gpio.io, (irq->gpio.enable==GPIO_LOW)?GPIOPullUp:GPIOPullDown);
189 LOG("Request irq for bt wakeup host\n");
190 irq->irq = gpio_to_irq(irq->gpio.io);
191 sprintf(irq->name, "%s_irq", irq->gpio.name);
192 ret = request_irq(irq->irq,
193 rfkill_rk_wake_host_irq,
194 (irq->gpio.enable==GPIO_LOW)?IRQF_TRIGGER_FALLING:IRQF_TRIGGER_RISING,
198 LOG("** disable irq\n");
199 disable_irq(irq->irq);
200 ret = enable_irq_wake(irq->irq);
207 free_irq(irq->gpio.io, rfkill);
209 gpio_free(irq->gpio.io);
214 static inline void rfkill_rk_sleep_bt_internal(struct rfkill_rk_data *rfkill, bool sleep)
216 struct rfkill_rk_gpio *wake = &rfkill->pdata->wake_gpio;
218 DBG("*** bt sleep: %d ***\n", sleep);
219 gpio_direction_output(wake->io, sleep?!wake->enable:wake->enable);
222 static void rfkill_rk_delay_sleep_bt(struct work_struct *work)
224 struct rfkill_rk_data *rfkill = NULL;
225 DBG("Enter %s\n",__FUNCTION__);
227 rfkill = container_of(work, struct rfkill_rk_data, bt_sleep_delay_work.work);
229 rfkill_rk_sleep_bt_internal(rfkill, BT_SLEEP);
233 * rfkill_rk_sleep_bt - Sleep or Wakeup BT
234 * 1 ÔÚ¸øBTÉϵçʱºò£¬µ÷Óøú¯Êý»½ÐÑBT
235 * 2 ÔÚsuspendÇý¶¯Ê±ºò£¬µ÷Óøú¯Êý˯ÃßBT
236 * 3 ÔÚHCIÇý¶¯ÖУ¬µ±ÓÐÃüÁî·¢Ë͸øBTʱ£¬µ÷Óøú¯Êý»½ÐÑBT
238 * ¶ÔÀ¶ÑÀµÄÖ¸Áî·¢ËÍÊÇ·¢ÉúÔÚÀ¶ÑÀÉϵçÖ®ºó£¬Òò´Ë1Óë3²»»áͬʱµ÷Óøú¯Êý
239 * À¶ÑÀÖ¸Áî·¢ËÍÓÉÓû§²ã·¢Æð£¬2Óë3²»»áͬʱµ÷Óøú¯Êý
241 void rfkill_rk_sleep_bt(bool sleep)
243 struct rfkill_rk_data *rfkill = g_rfkill;
244 struct rfkill_rk_gpio *wake;
246 DBG("Enter %s\n",__FUNCTION__);
250 LOG("*** RFKILL is empty???\n");
254 wake = &rfkill->pdata->wake_gpio;
255 if (!gpio_is_valid(wake->io))
257 DBG("*** Not support bt wakeup and sleep\n");
261 // È¡Ïûdelay work£¬Èç¹ûwork´¦ÓÚpendding£¬ÔòÁ¢¼´È¡Ïû
262 // Èç¹ûwork´¦ÓÚrunning£¬ÔòµÈ´ýÖ±µ½¸Ãwork½áÊø
263 ret = cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
265 rfkill_rk_sleep_bt_internal(rfkill, sleep);
267 #ifdef CONFIG_BT_AUTOSLEEP
268 if (sleep==BT_WAKEUP)
270 // ÖØÐÂÉèÖÃdelay work
271 schedule_delayed_work(&rfkill->bt_sleep_delay_work,
272 msecs_to_jiffies(BT_WAKEUP_TIMEOUT));
276 EXPORT_SYMBOL(rfkill_rk_sleep_bt);
278 static int rfkill_rk_set_power(void *data, bool blocked)
280 struct rfkill_rk_data *rfkill = data;
281 struct rfkill_rk_gpio *poweron = &rfkill->pdata->poweron_gpio;
282 struct rfkill_rk_gpio *reset = &rfkill->pdata->reset_gpio;
284 DBG("Enter %s\n", __func__);
286 DBG("Set blocked:%d\n", blocked);
288 if (false == blocked) {
289 rfkill_rk_sleep_bt(BT_WAKEUP); // ensure bt is wakeup
291 if (gpio_is_valid(poweron->io))
293 gpio_direction_output(poweron->io, poweron->enable);
296 if (gpio_is_valid(reset->io))
298 gpio_direction_output(reset->io, reset->enable);
300 gpio_direction_output(reset->io, !reset->enable);
304 LOG("bt turn on power\n");
306 #if WIFI_BT_POWER_TOGGLE
307 if (!rk29sdk_wifi_power_state) {
309 if (gpio_is_valid(poweron->io))
311 gpio_direction_output(poweron->io, !poweron->enable);
315 LOG("bt shut off power\n");
316 #if WIFI_BT_POWER_TOGGLE
318 LOG("bt shouldn't shut off power, wifi is using it!\n");
321 if (gpio_is_valid(reset->io))
323 gpio_direction_output(reset->io, reset->enable);/* bt reset active*/
328 #if WIFI_BT_POWER_TOGGLE
329 rk29sdk_bt_power_state = !blocked;
334 static int rfkill_rk_pm_prepare(struct device *dev)
336 struct rfkill_rk_data *rfkill = g_rfkill;
337 struct rfkill_rk_gpio* rts;
338 struct rfkill_rk_irq* wake_host_irq;
339 DBG("Enter %s\n",__FUNCTION__);
344 rts = &rfkill->pdata->rts_gpio;
345 wake_host_irq = &rfkill->pdata->wake_host_irq;
347 //To prevent uart to receive bt data when suspended
348 if (gpio_is_valid(rts->io))
350 DBG("Disable UART_RTS\n");
353 rk_mux_api_set(rts->iomux.name, rts->iomux.fgpio);
355 gpio_direction_output(rts->io, !rts->enable);
358 #ifdef CONFIG_BT_AUTOSLEEP
359 // BT½øÈë˯Ãß״̬£¬²»½ÓÊÕÖ÷¿ØÊý¾Ý
360 rfkill_rk_sleep_bt(BT_SLEEP);
363 /* ÖÁ´Ë£¬À¶ÑÀ²»ÔÙËÍÊý¾Ýµ½UART£¬Ò²²»ÔÙ½ÓÊÕÖ÷¿ØµÄUARTÊý¾Ý
364 * ½Ó×ŵ÷ÓÃenable_irqʹÄÜ bt_wake_host irq£¬µ±Ô¶¶ËÉ豸ÓÐÊý¾Ý
365 * µ½À´Ê±£¬½«Í¨¹ý¸ÃIRQ»½ÐÑÖ÷¿Ø
368 // enable bt wakeup host
369 if (gpio_is_valid(wake_host_irq->gpio.io))
371 DBG("enable irq for bt wakeup host\n");
372 enable_irq(wake_host_irq->irq);
375 #ifdef CONFIG_RFKILL_RESET
376 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
377 rfkill_rk_set_power(rfkill, BT_BLOCKED);
383 static void rfkill_rk_pm_complete(struct device *dev)
385 struct rfkill_rk_data *rfkill = g_rfkill;
386 struct rfkill_rk_irq* wake_host_irq;
387 struct rfkill_rk_gpio* rts;
388 DBG("Enter %s\n",__FUNCTION__);
393 wake_host_irq = &rfkill->pdata->wake_host_irq;
394 rts = &rfkill->pdata->rts_gpio;
396 if (gpio_is_valid(wake_host_irq->gpio.io))
398 // ½ûÓõô BT_WAKE_HOST IRQ£¬È·±£ÔÚϵͳ»½ÐѺ󲻻áÒòBTµÄ²Ù×÷
400 LOG("** disable irq\n");
401 disable_irq(wake_host_irq->irq);
404 /* ʹÓÃUART_RTS£¬´ËʱÀ¶ÑÀÈç¹ûÓÐÊý¾Ý¾Í»áË͵½UART
405 * Éϲã·ÖÎöËÍÀ´µÄÊý¾Ý²¢×ö³öÏàÓ¦µÄ¶¯×÷£¬±ÈÈç: ËÍÀ´µÄÊÇ
406 * Åä¶ÔÇëÇó£¬ÔòÉϲ㽫»áÁÁÆÁ²¢µ¯³öÅä¶Ô½çÃæ
408 if (gpio_is_valid(rts->io))
410 DBG("Enable UART_RTS\n");
411 gpio_direction_output(rts->io, rts->enable);
414 rk_mux_api_set(rts->iomux.name, rts->iomux.fmux);
419 static const struct rfkill_ops rfkill_rk_ops = {
420 .set_block = rfkill_rk_set_power,
423 static int rfkill_rk_probe(struct platform_device *pdev)
425 struct rfkill_rk_data *rfkill;
426 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
429 DBG("Enter %s\n", __func__);
432 LOG("%s: No platform data specified\n", __func__);
436 pdata->name = (char*)bt_name;
438 rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL);
442 rfkill->pdata = pdata;
447 // ¶ÔÓÚRK29 BCM4329£¬ËüµÄpoweron ioÓëwifi¹²Óã¬ÔÚboadÎļþÖÐÒѾrequest
449 #if !WIFI_BT_POWER_TOGGLE
450 ret = rfkill_rk_setup_gpio(&pdata->poweron_gpio, IOMUX_FGPIO, pdata->name, "poweron");
451 if (ret) goto fail_alloc;
454 ret = rfkill_rk_setup_gpio(&pdata->reset_gpio, IOMUX_FGPIO, pdata->name, "reset");
455 if (ret) goto fail_poweron;
457 ret = rfkill_rk_setup_gpio(&pdata->wake_gpio, IOMUX_FGPIO, pdata->name, "wake");
458 if (ret) goto fail_reset;
460 ret = rfkill_rk_setup_wake_irq(rfkill);
461 if (ret) goto fail_wake;
463 ret = rfkill_rk_setup_gpio(&pdata->rts_gpio, IOMUX_FMUX, rfkill->pdata->name, "rts");
464 if (ret) goto fail_wake_host_irq;
466 // ´´½¨²¢×¢²áRFKILLÉ豸
467 DBG("setup rfkill\n");
468 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
469 &rfkill_rk_ops, rfkill);
470 if (!rfkill->rfkill_dev)
473 // cmy: ÉèÖÃrfkill³õʼ״̬Ϊblocked£¬ÔÚ×¢²áʱ²»»áµ÷Óà set_blockedº¯Êý
474 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
475 ret = rfkill_register(rfkill->rfkill_dev);
479 wake_lock_init(&(rfkill->bt_irq_wl), WAKE_LOCK_SUSPEND, "rfkill_rk_irq_wl");
480 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work, rfkill_rk_delay_sleep_bt);
482 // cmy: ÉèÖÃÀ¶ÑÀµçÔ´µÄ״̬Ϊ blocked
483 rfkill_rk_set_power(rfkill, BT_BLOCKED);
485 platform_set_drvdata(pdev, rfkill);
487 LOG("%s device registered.\n", pdata->name);
492 rfkill_destroy(rfkill->rfkill_dev);
494 if (gpio_is_valid(pdata->rts_gpio.io))
495 gpio_free(pdata->rts_gpio.io);
497 if (gpio_is_valid(pdata->wake_host_irq.gpio.io)){
498 free_irq(pdata->wake_host_irq.irq, rfkill);
499 gpio_free(pdata->wake_host_irq.gpio.io);
502 if (gpio_is_valid(pdata->wake_gpio.io))
503 gpio_free(pdata->wake_gpio.io);
505 if (gpio_is_valid(pdata->reset_gpio.io))
506 gpio_free(pdata->reset_gpio.io);
508 #if !WIFI_BT_POWER_TOGGLE
509 if (gpio_is_valid(pdata->poweron_gpio.io))
510 gpio_free(pdata->poweron_gpio.io);
519 static int rfkill_rk_remove(struct platform_device *pdev)
521 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
523 LOG("Enter %s\n", __func__);
525 rfkill_unregister(rfkill->rfkill_dev);
526 rfkill_destroy(rfkill->rfkill_dev);
528 wake_lock_destroy(&rfkill->bt_irq_wl);
530 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
533 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
534 gpio_free(rfkill->pdata->rts_gpio.io);
536 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)){
537 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
538 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
541 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
542 gpio_free(rfkill->pdata->wake_gpio.io);
544 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
545 gpio_free(rfkill->pdata->reset_gpio.io);
547 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
548 gpio_free(rfkill->pdata->poweron_gpio.io);
556 static const struct dev_pm_ops rfkill_rk_pm_ops = {
557 .prepare = rfkill_rk_pm_prepare,
558 .complete = rfkill_rk_pm_complete,
561 static struct platform_driver rfkill_rk_driver = {
562 .probe = rfkill_rk_probe,
563 .remove = __devexit_p(rfkill_rk_remove),
566 .owner = THIS_MODULE,
567 .pm = &rfkill_rk_pm_ops,
571 static int __init rfkill_rk_init(void)
573 LOG("Enter %s\n", __func__);
574 return platform_driver_register(&rfkill_rk_driver);
577 static void __exit rfkill_rk_exit(void)
579 LOG("Enter %s\n", __func__);
580 platform_driver_unregister(&rfkill_rk_driver);
583 module_init(rfkill_rk_init);
584 module_exit(rfkill_rk_exit);
586 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.2");
587 MODULE_AUTHOR("cmy@rock-chips.com, cz@rock-chips.com");
588 MODULE_LICENSE("GPL");