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
18 #include <linux/kernel.h>
19 #include <linux/platform_device.h>
20 #include <linux/module.h>
21 #include <linux/rfkill.h>
22 #include <linux/init.h>
23 #include <linux/slab.h>
24 #include <linux/delay.h>
25 #include <linux/rfkill-bt.h>
26 #include <linux/rfkill-wlan.h>
27 #include <linux/wakelock.h>
28 #include <linux/interrupt.h>
30 #include <linux/suspend.h>
31 #include <linux/proc_fs.h>
32 #include <linux/uaccess.h>
33 #include <linux/gpio.h>
35 #include <dt-bindings/gpio/gpio.h>
36 #include <uapi/linux/rfkill.h>
39 #include <linux/of_device.h>
40 #include <linux/of_gpio.h>
44 #define DBG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
49 #define LOG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
51 #define BT_WAKEUP_TIMEOUT 10000
52 #define BT_IRQ_WAKELOCK_TIMEOUT 10*1000
54 #define BT_BLOCKED true
55 #define BT_UNBLOCK false
57 #define BT_WAKEUP false
65 struct rfkill_rk_data {
66 struct rfkill_rk_platform_data *pdata;
67 struct platform_device *pdev;
68 struct rfkill *rfkill_dev;
69 struct wake_lock bt_irq_wl;
70 struct delayed_work bt_sleep_delay_work;
73 static struct rfkill_rk_data *g_rfkill = NULL;
75 static const char bt_name[] =
76 #if defined (CONFIG_BCM4330)
77 #if defined (CONFIG_BT_MODULE_NH660)
82 #elif defined (CONFIG_RK903)
83 #if defined(CONFIG_RKWIFI_26M)
88 #elif defined(CONFIG_BCM4329)
90 #elif defined(CONFIG_MV8787)
92 #elif defined(CONFIG_AP6210)
93 #if defined(CONFIG_RKWIFI_26M)
98 #elif defined(CONFIG_AP6330)
100 #elif defined(CONFIG_AP6476)
102 #elif defined(CONFIG_AP6493)
104 #elif defined(CONFIG_AP6441)
106 #elif defined(CONFIG_AP6335)
108 #elif defined(CONFIG_GB86302I)
115 static irqreturn_t rfkill_rk_wake_host_irq(int irq, void *dev)
117 struct rfkill_rk_data *rfkill = dev;
118 LOG("BT_WAKE_HOST IRQ fired\n");
120 DBG("BT IRQ wakeup, request %dms wakelock\n", BT_IRQ_WAKELOCK_TIMEOUT);
122 wake_lock_timeout(&rfkill->bt_irq_wl,
123 msecs_to_jiffies(BT_IRQ_WAKELOCK_TIMEOUT));
128 static int rfkill_rk_setup_gpio(struct platform_device *pdev, struct rfkill_rk_gpio* gpio,
129 const char* prefix, const char* name)
131 if (gpio_is_valid(gpio->io)) {
133 sprintf(gpio->name, "%s_%s", prefix, name);
134 ret = devm_gpio_request(&pdev->dev, gpio->io, gpio->name);
136 LOG("Failed to get %s gpio.\n", gpio->name);
144 static int rfkill_rk_setup_wake_irq(struct rfkill_rk_data* rfkill)
147 struct rfkill_rk_irq* irq = &(rfkill->pdata->wake_host_irq);
149 ret = rfkill_rk_setup_gpio(rfkill->pdev, &irq->gpio, rfkill->pdata->name, "wake_host");
151 if (gpio_is_valid(irq->gpio.io))
153 //ret = gpio_pull_updown(irq->gpio.io, (irq->gpio.enable==GPIO_ACTIVE_LOW)?GPIOPullUp:GPIOPullDown);
154 //if (ret) goto fail2;
155 LOG("Request irq for bt wakeup host\n");
156 irq->irq = gpio_to_irq(irq->gpio.io);
157 sprintf(irq->name, "%s_irq", irq->gpio.name);
158 ret = request_irq(irq->irq,
159 rfkill_rk_wake_host_irq,
160 (irq->gpio.enable==GPIO_ACTIVE_LOW)?IRQF_TRIGGER_FALLING:IRQF_TRIGGER_RISING,
164 LOG("** disable irq\n");
165 disable_irq(irq->irq);
166 ret = enable_irq_wake(irq->irq);
173 free_irq(irq->gpio.io, rfkill);
175 gpio_free(irq->gpio.io);
180 static inline void rfkill_rk_sleep_bt_internal(struct rfkill_rk_data *rfkill, bool sleep)
182 struct rfkill_rk_gpio *wake = &rfkill->pdata->wake_gpio;
184 DBG("*** bt sleep: %d ***\n", sleep);
185 #ifndef CONFIG_BK3515A_COMBO
186 gpio_direction_output(wake->io, sleep?!wake->enable:wake->enable);
190 DBG("HOST_UART0_TX pull down 10us\n");
191 if (rfkill_rk_setup_gpio(rfkill->pdev, wake, rfkill->pdata->name, "wake") != 0) {
195 gpio_direction_output(wake->io, wake->enable);
197 gpio_direction_output(wake->io, !wake->enable);
204 static void rfkill_rk_delay_sleep_bt(struct work_struct *work)
206 struct rfkill_rk_data *rfkill = NULL;
207 DBG("Enter %s\n",__FUNCTION__);
209 rfkill = container_of(work, struct rfkill_rk_data, bt_sleep_delay_work.work);
211 rfkill_rk_sleep_bt_internal(rfkill, BT_SLEEP);
214 void rfkill_rk_sleep_bt(bool sleep)
216 struct rfkill_rk_data *rfkill = g_rfkill;
217 struct rfkill_rk_gpio *wake;
219 DBG("Enter %s\n",__FUNCTION__);
223 LOG("*** RFKILL is empty???\n");
227 wake = &rfkill->pdata->wake_gpio;
228 if (!gpio_is_valid(wake->io))
230 DBG("*** Not support bt wakeup and sleep\n");
234 ret = cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
236 rfkill_rk_sleep_bt_internal(rfkill, sleep);
238 #ifdef CONFIG_BT_AUTOSLEEP
239 if (sleep==BT_WAKEUP)
241 schedule_delayed_work(&rfkill->bt_sleep_delay_work,
242 msecs_to_jiffies(BT_WAKEUP_TIMEOUT));
246 EXPORT_SYMBOL(rfkill_rk_sleep_bt);
248 static int bt_power_state = 0;
249 int rfkill_get_bt_power_state(int *power, bool *toggle)
251 struct rfkill_rk_data *mrfkill = g_rfkill;
253 if (mrfkill == NULL) {
254 LOG("%s: rfkill-bt driver has not Successful initialized\n", __func__);
258 *toggle = mrfkill->pdata->power_toggle;
259 *power = bt_power_state;
264 static int rfkill_rk_set_power(void *data, bool blocked)
266 struct rfkill_rk_data *rfkill = data;
267 struct rfkill_rk_gpio *poweron = &rfkill->pdata->poweron_gpio;
268 struct rfkill_rk_gpio *reset = &rfkill->pdata->reset_gpio;
269 struct rfkill_rk_gpio* rts = &rfkill->pdata->rts_gpio;
270 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
271 int power = 0, vref_ctrl_enable = 0;
274 DBG("Enter %s\n", __func__);
276 DBG("Set blocked:%d\n", blocked);
278 toggle = rfkill->pdata->power_toggle;
279 if (!rfkill_get_wifi_power_state(&power, &vref_ctrl_enable)) {
280 if (true == toggle && 1 == power) {
281 LOG("%s: bt shouldn't control the power, it was enabled by wifi!\n", __func__);
285 LOG("%s: cannot get wifi power state!\n", __func__);
289 if (false == blocked) {
291 rfkill_rk_sleep_bt(BT_WAKEUP); // ensure bt is wakeup
293 if (gpio_is_valid(poweron->io))
295 gpio_direction_output(poweron->io, !poweron->enable);
297 gpio_direction_output(poweron->io, poweron->enable);
300 if (gpio_is_valid(reset->io))
302 gpio_direction_output(reset->io, !reset->enable);
304 gpio_direction_output(reset->io, reset->enable);
307 if (pinctrl != NULL && gpio_is_valid(rts->io))
309 pinctrl_select_state(pinctrl, rts->gpio_state);
310 LOG("ENABLE UART_RTS\n");
311 gpio_direction_output(rts->io, rts->enable);
313 LOG("DISABLE UART_RTS\n");
314 gpio_direction_output(rts->io, !rts->enable);
315 pinctrl_select_state(pinctrl, rts->default_state);
319 LOG("bt turn on power\n");
321 if (gpio_is_valid(poweron->io))
323 gpio_direction_output(poweron->io, !poweron->enable);
328 LOG("bt shut off power\n");
329 if (gpio_is_valid(reset->io))
331 gpio_direction_output(reset->io, !reset->enable);/* bt reset active*/
340 static int rfkill_rk_pm_prepare(struct device *dev)
342 struct rfkill_rk_data *rfkill = g_rfkill;
343 struct rfkill_rk_gpio* rts;
344 struct rfkill_rk_irq* wake_host_irq;
345 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
347 DBG("Enter %s\n",__FUNCTION__);
352 rts = &rfkill->pdata->rts_gpio;
353 wake_host_irq = &rfkill->pdata->wake_host_irq;
355 //To prevent uart to receive bt data when suspended
356 if (pinctrl != NULL && gpio_is_valid(rts->io))
358 DBG("Disable UART_RTS\n");
359 pinctrl_select_state(pinctrl, rts->gpio_state);
360 gpio_direction_output(rts->io, !rts->enable);
363 #ifdef CONFIG_BT_AUTOSLEEP
364 rfkill_rk_sleep_bt(BT_SLEEP);
367 // enable bt wakeup host
368 if (gpio_is_valid(wake_host_irq->gpio.io))
370 DBG("enable irq for bt wakeup host\n");
371 enable_irq(wake_host_irq->irq);
374 #ifdef CONFIG_RFKILL_RESET
375 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
376 rfkill_rk_set_power(rfkill, BT_BLOCKED);
382 static void rfkill_rk_pm_complete(struct device *dev)
384 struct rfkill_rk_data *rfkill = g_rfkill;
385 struct rfkill_rk_irq* wake_host_irq;
386 struct rfkill_rk_gpio* rts;
387 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
389 DBG("Enter %s\n",__FUNCTION__);
394 wake_host_irq = &rfkill->pdata->wake_host_irq;
395 rts = &rfkill->pdata->rts_gpio;
397 if (gpio_is_valid(wake_host_irq->gpio.io))
399 LOG("** disable irq\n");
400 disable_irq(wake_host_irq->irq);
403 if (pinctrl != NULL && gpio_is_valid(rts->io))
405 DBG("Enable UART_RTS\n");
406 gpio_direction_output(rts->io, rts->enable);
407 pinctrl_select_state(pinctrl, rts->default_state);
411 static const struct rfkill_ops rfkill_rk_ops = {
412 .set_block = rfkill_rk_set_power,
415 #define PROC_DIR "bluetooth/sleep"
417 static struct proc_dir_entry *bluetooth_dir, *sleep_dir;
419 static ssize_t bluesleep_read_proc_lpm(struct file *file, char __user *buffer,
420 size_t count, loff_t *data)
422 return sprintf(buffer, "unsupported to read\n");
425 static ssize_t bluesleep_write_proc_lpm(struct file *file,
426 const char __user *buffer,
427 size_t count, loff_t *data)
432 static ssize_t bluesleep_read_proc_btwrite(struct file *file,
434 size_t count, loff_t *data)
436 return sprintf(buffer, "unsupported to read\n");
439 static ssize_t bluesleep_write_proc_btwrite(struct file *file,
440 const char __user *buffer,
441 size_t count, loff_t *data)
448 if (copy_from_user(&b, buffer, 1))
451 DBG("btwrite %c\n", b);
454 rfkill_rk_sleep_bt(BT_WAKEUP);
461 static int bluetooth_platdata_parse_dt(struct device *dev,
462 struct rfkill_rk_platform_data *data)
464 struct device_node *node = dev->of_node;
466 enum of_gpio_flags flags;
471 memset(data, 0, sizeof(*data));
473 if (of_find_property(node, "wifi-bt-power-toggle", NULL)) {
474 data->power_toggle = true;
475 LOG("%s: get property wifi-bt-power-toggle.\n", __func__);
477 data->power_toggle = false;
480 gpio = of_get_named_gpio_flags(node, "uart_rts_gpios", 0, &flags);
481 if (gpio_is_valid(gpio)) {
482 data->rts_gpio.io = gpio;
483 data->rts_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
484 LOG("%s: get property: uart_rts_gpios = %d.\n", __func__, gpio);
485 data->pinctrl = devm_pinctrl_get(dev);
486 if (!IS_ERR(data->pinctrl)) {
487 data->rts_gpio.default_state = pinctrl_lookup_state(data->pinctrl, "default");
488 data->rts_gpio.gpio_state = pinctrl_lookup_state(data->pinctrl, "rts_gpio");
490 data->pinctrl = NULL;
491 LOG("%s: dts does't define the uart rts iomux.\n", __func__);
495 data->pinctrl = NULL;
496 LOG("%s: uart_rts_gpios is unvalid.\n", __func__);
500 gpio = of_get_named_gpio_flags(node, "BT,power_gpio", 0, &flags);
501 if (gpio_is_valid(gpio)){
502 data->poweron_gpio.io = gpio;
503 data->poweron_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
504 LOG("%s: get property: BT,power_gpio = %d.\n", __func__, gpio);
505 } else data->poweron_gpio.io = -1;
506 gpio = of_get_named_gpio_flags(node, "BT,reset_gpio", 0, &flags);
507 if (gpio_is_valid(gpio)){
508 data->reset_gpio.io = gpio;
509 data->reset_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
510 LOG("%s: get property: BT,reset_gpio = %d.\n", __func__, gpio);
511 } else data->reset_gpio.io = -1;
512 gpio = of_get_named_gpio_flags(node, "BT,wake_gpio", 0, &flags);
513 if (gpio_is_valid(gpio)){
514 data->wake_gpio.io = gpio;
515 data->wake_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
516 LOG("%s: get property: BT,wake_gpio = %d.\n", __func__, gpio);
517 } else data->wake_gpio.io = -1;
518 gpio = of_get_named_gpio_flags(node, "BT,wake_host_irq", 0, &flags);
519 if (gpio_is_valid(gpio)) {
520 data->wake_host_irq.gpio.io = gpio;
521 data->wake_host_irq.gpio.enable = flags;
522 LOG("%s: get property: BT,wake_host_irq = %d.\n", __func__, gpio);
523 } else data->wake_host_irq.gpio.io = -1;
529 static const struct file_operations bluesleep_lpm = {
530 .owner = THIS_MODULE,
531 .read = bluesleep_read_proc_lpm,
532 .write = bluesleep_write_proc_lpm,
535 static const struct file_operations bluesleep_btwrite = {
536 .owner = THIS_MODULE,
537 .read = bluesleep_read_proc_btwrite,
538 .write = bluesleep_write_proc_btwrite,
541 static int rfkill_rk_probe(struct platform_device *pdev)
543 struct rfkill_rk_data *rfkill;
544 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
546 struct proc_dir_entry *ent;
548 DBG("Enter %s\n", __func__);
552 pdata = devm_kzalloc(&pdev->dev, sizeof(struct rfkill_rk_platform_data), GFP_KERNEL);
556 ret = bluetooth_platdata_parse_dt(&pdev->dev, pdata);
559 LOG("%s: No platform data specified\n", __func__);
566 pdata->name = (char*)bt_name;
567 pdata->type = RFKILL_TYPE_BLUETOOTH;
569 rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
573 rfkill->pdata = pdata;
577 bluetooth_dir = proc_mkdir("bluetooth", NULL);
578 if (bluetooth_dir == NULL) {
579 LOG("Unable to create /proc/bluetooth directory");
583 sleep_dir = proc_mkdir("sleep", bluetooth_dir);
584 if (sleep_dir == NULL) {
585 LOG("Unable to create /proc/%s directory", PROC_DIR);
589 /* read/write proc entries */
590 ent = proc_create("lpm", 0, sleep_dir, &bluesleep_lpm);
592 LOG("Unable to create /proc/%s/lpm entry", PROC_DIR);
597 /* read/write proc entries */
598 ent = proc_create("btwrite", 0, sleep_dir, &bluesleep_btwrite);
600 LOG("Unable to create /proc/%s/btwrite entry", PROC_DIR);
607 ret = rfkill_rk_setup_gpio(pdev, &pdata->poweron_gpio, pdata->name, "poweron");
608 if (ret) goto fail_gpio;
610 ret = rfkill_rk_setup_gpio(pdev, &pdata->reset_gpio, pdata->name, "reset");
611 if (ret) goto fail_gpio;
613 ret = rfkill_rk_setup_gpio(pdev, &pdata->wake_gpio, pdata->name, "wake");
614 if (ret) goto fail_gpio;
616 ret = rfkill_rk_setup_gpio(pdev, &pdata->rts_gpio, rfkill->pdata->name, "rts");
617 if (ret) goto fail_gpio;
619 wake_lock_init(&(rfkill->bt_irq_wl), WAKE_LOCK_SUSPEND, "rfkill_rk_irq_wl");
621 ret = rfkill_rk_setup_wake_irq(rfkill);
622 if (ret) goto fail_gpio;
624 DBG("setup rfkill\n");
625 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
626 &rfkill_rk_ops, rfkill);
627 if (!rfkill->rfkill_dev)
630 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
631 ret = rfkill_register(rfkill->rfkill_dev);
635 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work, rfkill_rk_delay_sleep_bt);
637 //rfkill_rk_set_power(rfkill, BT_BLOCKED);
639 if (gpio_is_valid(pdata->poweron_gpio.io))
641 gpio_direction_output(pdata->poweron_gpio.io, !pdata->poweron_gpio.enable);
643 if (gpio_is_valid(pdata->reset_gpio.io))
645 gpio_direction_output(pdata->reset_gpio.io, !pdata->reset_gpio.enable);
648 platform_set_drvdata(pdev, rfkill);
650 LOG("%s device registered.\n", pdata->name);
655 rfkill_destroy(rfkill->rfkill_dev);
658 remove_proc_entry("btwrite", sleep_dir);
659 remove_proc_entry("lpm", sleep_dir);
666 static int rfkill_rk_remove(struct platform_device *pdev)
668 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
670 LOG("Enter %s\n", __func__);
672 rfkill_unregister(rfkill->rfkill_dev);
673 rfkill_destroy(rfkill->rfkill_dev);
676 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
679 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
680 gpio_free(rfkill->pdata->rts_gpio.io);
682 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)){
683 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
684 #ifndef CONFIG_BK3515A_COMBO
685 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
689 #ifndef CONFIG_BK3515A_COMBO
690 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
691 gpio_free(rfkill->pdata->wake_gpio.io);
694 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
695 gpio_free(rfkill->pdata->reset_gpio.io);
697 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
698 gpio_free(rfkill->pdata->poweron_gpio.io);
705 static const struct dev_pm_ops rfkill_rk_pm_ops = {
706 .prepare = rfkill_rk_pm_prepare,
707 .complete = rfkill_rk_pm_complete,
711 static struct of_device_id bt_platdata_of_match[] = {
712 { .compatible = "bluetooth-platdata" },
715 MODULE_DEVICE_TABLE(of, bt_platdata_of_match);
718 static struct platform_driver rfkill_rk_driver = {
719 .probe = rfkill_rk_probe,
720 .remove = rfkill_rk_remove,
723 .owner = THIS_MODULE,
724 .pm = &rfkill_rk_pm_ops,
725 .of_match_table = of_match_ptr(bt_platdata_of_match),
729 static int __init rfkill_rk_init(void)
731 LOG("Enter %s\n", __func__);
732 return platform_driver_register(&rfkill_rk_driver);
735 static void __exit rfkill_rk_exit(void)
737 LOG("Enter %s\n", __func__);
738 platform_driver_unregister(&rfkill_rk_driver);
741 module_init(rfkill_rk_init);
742 module_exit(rfkill_rk_exit);
744 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.3");
745 MODULE_AUTHOR("cmy@rock-chips.com, gwl@rock-chips.com");
746 MODULE_LICENSE("GPL");