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)
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_RKWIFI)
107 #if defined(CONFIG_RKWIFI_26M)
112 #elif defined(CONFIG_BCM4329)
114 #elif defined(CONFIG_MV8787)
122 * rfkill_rk_wake_host_irq - BT_WAKE_HOST Öжϻص÷º¯Êý
123 * ÉêÇëÒ»¸öwakelock£¬ÒÔÈ·±£´Ë´Î»½ÐѲ»»áÂíÉϽáÊø
125 static irqreturn_t rfkill_rk_wake_host_irq(int irq, void *dev)
127 struct rfkill_rk_data *rfkill = dev;
128 LOG("BT_WAKE_HOST IRQ fired\n");
130 DBG("BT IRQ wakeup, request %dms wakelock\n", BT_IRQ_WAKELOCK_TIMEOUT);
132 wake_lock_timeout(&rfkill->bt_irq_wl,
133 msecs_to_jiffies(BT_IRQ_WAKELOCK_TIMEOUT));
139 * rfkill_rk_setup_gpio - ÉèÖÃGPIO
140 * gpio - ÒªÉèÖõÄGPIO
141 * mux - iomux ʲô¹¦ÄÜ
142 * prefix,name - ×é³É¸ÃIOµÄÃû³Æ
144 * ·µ»ØÖµÓë gpio_request Ïàͬ
146 static int rfkill_rk_setup_gpio(struct rfkill_rk_gpio* gpio, int mux, const char* prefix, const char* name)
148 if (gpio_is_valid(gpio->io)) {
150 sprintf(gpio->name, "%s_%s", prefix, name);
151 ret = gpio_request(gpio->io, gpio->name);
153 LOG("Failed to get %s gpio.\n", gpio->name);
156 if (gpio->iomux.name)
159 rk_mux_api_set(gpio->iomux.name, gpio->iomux.fgpio);
161 rk_mux_api_set(gpio->iomux.name, gpio->iomux.fmux);
170 // ÉèÖÃ BT_WAKE_HOST IRQ
171 static int rfkill_rk_setup_wake_irq(struct rfkill_rk_data* rfkill)
174 struct rfkill_rk_irq* irq = &(rfkill->pdata->wake_host_irq);
176 ret = rfkill_rk_setup_gpio(&irq->gpio, IOMUX_FGPIO, rfkill->pdata->name, "wake_host");
179 if (gpio_is_valid(irq->gpio.io))
181 ret = gpio_pull_updown(irq->gpio.io, (irq->gpio.enable==GPIO_LOW)?GPIOPullUp:GPIOPullDown);
183 LOG("Request irq for bt wakeup host\n");
184 irq->irq = gpio_to_irq(irq->gpio.io);
185 sprintf(irq->name, "%s_irq", irq->gpio.name);
186 ret = request_irq(irq->irq,
187 rfkill_rk_wake_host_irq,
188 (irq->gpio.enable==GPIO_LOW)?IRQF_TRIGGER_FALLING:IRQF_TRIGGER_RISING,
192 LOG("** disable irq\n");
193 disable_irq(irq->irq);
194 ret = enable_irq_wake(irq->irq);
201 free_irq(irq->gpio.io, rfkill);
203 gpio_free(irq->gpio.io);
208 static inline void rfkill_rk_sleep_bt_internal(struct rfkill_rk_data *rfkill, bool sleep)
210 struct rfkill_rk_gpio *wake = &rfkill->pdata->wake_gpio;
212 DBG("*** bt sleep: %d ***\n", sleep);
213 gpio_direction_output(wake->io, sleep?!wake->enable:wake->enable);
216 static void rfkill_rk_delay_sleep_bt(struct work_struct *work)
218 struct rfkill_rk_data *rfkill = NULL;
219 DBG("Enter %s\n",__FUNCTION__);
221 rfkill = container_of(work, struct rfkill_rk_data, bt_sleep_delay_work.work);
223 rfkill_rk_sleep_bt_internal(rfkill, BT_SLEEP);
227 * rfkill_rk_sleep_bt - Sleep or Wakeup BT
228 * 1 ÔÚ¸øBTÉϵçʱºò£¬µ÷Óøú¯Êý»½ÐÑBT
229 * 2 ÔÚsuspendÇý¶¯Ê±ºò£¬µ÷Óøú¯Êý˯ÃßBT
230 * 3 ÔÚHCIÇý¶¯ÖУ¬µ±ÓÐÃüÁî·¢Ë͸øBTʱ£¬µ÷Óøú¯Êý»½ÐÑBT
232 * ¶ÔÀ¶ÑÀµÄÖ¸Áî·¢ËÍÊÇ·¢ÉúÔÚÀ¶ÑÀÉϵçÖ®ºó£¬Òò´Ë1Óë3²»»áͬʱµ÷Óøú¯Êý
233 * À¶ÑÀÖ¸Áî·¢ËÍÓÉÓû§²ã·¢Æð£¬2Óë3²»»áͬʱµ÷Óøú¯Êý
235 void rfkill_rk_sleep_bt(bool sleep)
237 struct rfkill_rk_data *rfkill = g_rfkill;
238 struct rfkill_rk_gpio *wake;
240 DBG("Enter %s\n",__FUNCTION__);
244 LOG("*** RFKILL is empty???\n");
248 wake = &rfkill->pdata->wake_gpio;
249 if (!gpio_is_valid(wake->io))
251 DBG("*** Not support bt wakeup and sleep\n");
255 // È¡Ïûdelay work£¬Èç¹ûwork´¦ÓÚpendding£¬ÔòÁ¢¼´È¡Ïû
256 // Èç¹ûwork´¦ÓÚrunning£¬ÔòµÈ´ýÖ±µ½¸Ãwork½áÊø
257 ret = cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
259 rfkill_rk_sleep_bt_internal(rfkill, sleep);
261 #ifdef CONFIG_BT_AUTOSLEEP
262 if (sleep==BT_WAKEUP)
264 // ÖØÐÂÉèÖÃdelay work
265 schedule_delayed_work(&rfkill->bt_sleep_delay_work,
266 msecs_to_jiffies(BT_WAKEUP_TIMEOUT));
270 EXPORT_SYMBOL(rfkill_rk_sleep_bt);
272 static int rfkill_rk_set_power(void *data, bool blocked)
274 struct rfkill_rk_data *rfkill = data;
275 struct rfkill_rk_gpio *poweron = &rfkill->pdata->poweron_gpio;
276 struct rfkill_rk_gpio *reset = &rfkill->pdata->reset_gpio;
278 DBG("Enter %s\n", __func__);
280 DBG("Set blocked:%d\n", blocked);
282 if (false == blocked) {
283 rfkill_rk_sleep_bt(BT_WAKEUP); // ensure bt is wakeup
285 if (gpio_is_valid(poweron->io))
287 gpio_direction_output(poweron->io, poweron->enable);
290 if (gpio_is_valid(reset->io))
292 gpio_direction_output(reset->io, reset->enable);
294 gpio_direction_output(reset->io, !reset->enable);
298 LOG("bt turn on power\n");
300 #if WIFI_BT_POWER_TOGGLE
301 if (!rk29sdk_wifi_power_state) {
303 if (gpio_is_valid(poweron->io))
305 gpio_direction_output(poweron->io, !poweron->enable);
309 LOG("bt shut off power\n");
310 #if WIFI_BT_POWER_TOGGLE
312 LOG("bt shouldn't shut off power, wifi is using it!\n");
315 if (gpio_is_valid(reset->io))
317 gpio_direction_output(reset->io, reset->enable);/* bt reset active*/
322 #if WIFI_BT_POWER_TOGGLE
323 rk29sdk_bt_power_state = !blocked;
328 static int rfkill_rk_pm_prepare(struct device *dev)
330 struct rfkill_rk_data *rfkill = g_rfkill;
331 struct rfkill_rk_gpio* rts;
332 struct rfkill_rk_irq* wake_host_irq;
333 DBG("Enter %s\n",__FUNCTION__);
338 rts = &rfkill->pdata->rts_gpio;
339 wake_host_irq = &rfkill->pdata->wake_host_irq;
341 //To prevent uart to receive bt data when suspended
342 if (gpio_is_valid(rts->io))
344 DBG("Disable UART_RTS\n");
347 rk_mux_api_set(rts->iomux.name, rts->iomux.fgpio);
349 gpio_direction_output(rts->io, !rts->enable);
352 #ifdef CONFIG_BT_AUTOSLEEP
353 // BT½øÈë˯Ãß״̬£¬²»½ÓÊÕÖ÷¿ØÊý¾Ý
354 rfkill_rk_sleep_bt(BT_SLEEP);
357 /* ÖÁ´Ë£¬À¶ÑÀ²»ÔÙËÍÊý¾Ýµ½UART£¬Ò²²»ÔÙ½ÓÊÕÖ÷¿ØµÄUARTÊý¾Ý
358 * ½Ó×ŵ÷ÓÃenable_irqʹÄÜ bt_wake_host irq£¬µ±Ô¶¶ËÉ豸ÓÐÊý¾Ý
359 * µ½À´Ê±£¬½«Í¨¹ý¸ÃIRQ»½ÐÑÖ÷¿Ø
362 // enable bt wakeup host
363 if (gpio_is_valid(wake_host_irq->gpio.io))
365 DBG("enable irq for bt wakeup host\n");
366 enable_irq(wake_host_irq->irq);
369 #ifdef CONFIG_RFKILL_RESET
370 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
371 rfkill_rk_set_power(rfkill, BT_BLOCKED);
377 static void rfkill_rk_pm_complete(struct device *dev)
379 struct rfkill_rk_data *rfkill = g_rfkill;
380 struct rfkill_rk_irq* wake_host_irq;
381 struct rfkill_rk_gpio* rts;
382 DBG("Enter %s\n",__FUNCTION__);
387 wake_host_irq = &rfkill->pdata->wake_host_irq;
388 rts = &rfkill->pdata->rts_gpio;
390 if (gpio_is_valid(wake_host_irq->gpio.io))
392 // ½ûÓõô BT_WAKE_HOST IRQ£¬È·±£ÔÚϵͳ»½ÐѺ󲻻áÒòBTµÄ²Ù×÷
394 LOG("** disable irq\n");
395 disable_irq(wake_host_irq->irq);
398 /* ʹÓÃUART_RTS£¬´ËʱÀ¶ÑÀÈç¹ûÓÐÊý¾Ý¾Í»áË͵½UART
399 * Éϲã·ÖÎöËÍÀ´µÄÊý¾Ý²¢×ö³öÏàÓ¦µÄ¶¯×÷£¬±ÈÈç: ËÍÀ´µÄÊÇ
400 * Åä¶ÔÇëÇó£¬ÔòÉϲ㽫»áÁÁÆÁ²¢µ¯³öÅä¶Ô½çÃæ
402 if (gpio_is_valid(rts->io))
404 DBG("Enable UART_RTS\n");
405 gpio_direction_output(rts->io, rts->enable);
408 rk_mux_api_set(rts->iomux.name, rts->iomux.fmux);
413 static const struct rfkill_ops rfkill_rk_ops = {
414 .set_block = rfkill_rk_set_power,
417 static int rfkill_rk_probe(struct platform_device *pdev)
419 struct rfkill_rk_data *rfkill;
420 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
423 DBG("Enter %s\n", __func__);
426 LOG("%s: No platform data specified\n", __func__);
430 pdata->name = (char*)bt_name;
432 rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL);
436 rfkill->pdata = pdata;
441 // ¶ÔÓÚRK29 BCM4329£¬ËüµÄpoweron ioÓëwifi¹²Óã¬ÔÚboadÎļþÖÐÒѾrequest
443 #if !WIFI_BT_POWER_TOGGLE
444 ret = rfkill_rk_setup_gpio(&pdata->poweron_gpio, IOMUX_FGPIO, pdata->name, "poweron");
445 if (ret) goto fail_alloc;
448 ret = rfkill_rk_setup_gpio(&pdata->reset_gpio, IOMUX_FGPIO, pdata->name, "reset");
449 if (ret) goto fail_poweron;
451 ret = rfkill_rk_setup_gpio(&pdata->wake_gpio, IOMUX_FGPIO, pdata->name, "wake");
452 if (ret) goto fail_reset;
454 ret = rfkill_rk_setup_wake_irq(rfkill);
455 if (ret) goto fail_wake;
457 ret = rfkill_rk_setup_gpio(&(pdata->rts_gpio), IOMUX_FNORMAL, rfkill->pdata->name, "rts");
458 if (ret) goto fail_wake_host_irq;
460 // ´´½¨²¢×¢²áRFKILLÉ豸
461 DBG("setup rfkill\n");
462 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
463 &rfkill_rk_ops, rfkill);
464 if (!rfkill->rfkill_dev)
467 // cmy: ÉèÖÃrfkill³õʼ״̬Ϊblocked£¬ÔÚ×¢²áʱ²»»áµ÷Óà set_blockedº¯Êý
468 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
469 ret = rfkill_register(rfkill->rfkill_dev);
473 wake_lock_init(&(rfkill->bt_irq_wl), WAKE_LOCK_SUSPEND, "rfkill_rk_irq_wl");
474 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work, rfkill_rk_delay_sleep_bt);
476 // cmy: ÉèÖÃÀ¶ÑÀµçÔ´µÄ״̬Ϊ blocked
477 rfkill_rk_set_power(rfkill, BT_BLOCKED);
479 platform_set_drvdata(pdev, rfkill);
481 LOG("%s device registered.\n", pdata->name);
486 rfkill_destroy(rfkill->rfkill_dev);
488 if (gpio_is_valid(pdata->rts_gpio.io))
489 gpio_free(pdata->rts_gpio.io);
491 if (gpio_is_valid(pdata->wake_host_irq.gpio.io)){
492 free_irq(pdata->wake_host_irq.irq, rfkill);
493 gpio_free(pdata->wake_host_irq.gpio.io);
496 if (gpio_is_valid(pdata->wake_gpio.io))
497 gpio_free(pdata->wake_gpio.io);
499 if (gpio_is_valid(pdata->reset_gpio.io))
500 gpio_free(pdata->reset_gpio.io);
502 #if !WIFI_BT_POWER_TOGGLE
503 if (gpio_is_valid(pdata->poweron_gpio.io))
504 gpio_free(pdata->poweron_gpio.io);
513 static int rfkill_rk_remove(struct platform_device *pdev)
515 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
517 LOG("Enter %s\n", __func__);
519 rfkill_unregister(rfkill->rfkill_dev);
520 rfkill_destroy(rfkill->rfkill_dev);
522 wake_lock_destroy(&rfkill->bt_irq_wl);
524 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
527 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
528 gpio_free(rfkill->pdata->rts_gpio.io);
530 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)){
531 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
532 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
535 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
536 gpio_free(rfkill->pdata->wake_gpio.io);
538 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
539 gpio_free(rfkill->pdata->reset_gpio.io);
541 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
542 gpio_free(rfkill->pdata->poweron_gpio.io);
550 static const struct dev_pm_ops rfkill_rk_pm_ops = {
551 .prepare = rfkill_rk_pm_prepare,
552 .complete = rfkill_rk_pm_complete,
555 static struct platform_driver rfkill_rk_driver = {
556 .probe = rfkill_rk_probe,
557 .remove = __devexit_p(rfkill_rk_remove),
560 .owner = THIS_MODULE,
561 .pm = &rfkill_rk_pm_ops,
565 static int __init rfkill_rk_init(void)
567 LOG("Enter %s\n", __func__);
568 return platform_driver_register(&rfkill_rk_driver);
571 static void __exit rfkill_rk_exit(void)
573 LOG("Enter %s\n", __func__);
574 platform_driver_unregister(&rfkill_rk_driver);
577 module_init(rfkill_rk_init);
578 module_exit(rfkill_rk_exit);
580 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.2");
581 MODULE_AUTHOR("cmy@rock-chips.com, cz@rock-chips.com");
582 MODULE_LICENSE("GPL");