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>
25 #include <linux/delay.h>
26 #include <linux/rfkill-bt.h>
27 #include <linux/rfkill-wlan.h>
28 #include <linux/wakelock.h>
29 #include <linux/interrupt.h>
31 #include <linux/suspend.h>
32 #include <linux/proc_fs.h>
33 #include <linux/uaccess.h>
34 #include <linux/gpio.h>
36 #include <dt-bindings/gpio/gpio.h>
37 #include <uapi/linux/rfkill.h>
40 #include <linux/of_device.h>
41 #include <linux/of_gpio.h>
45 #define DBG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
50 #define LOG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
52 #define BT_WAKEUP_TIMEOUT 10000
53 #define BT_IRQ_WAKELOCK_TIMEOUT 10*1000
55 #define BT_BLOCKED true
56 #define BT_UNBLOCK false
58 #define BT_WAKEUP false
66 struct rfkill_rk_data {
67 struct rfkill_rk_platform_data *pdata;
68 struct platform_device *pdev;
69 struct rfkill *rfkill_dev;
70 struct wake_lock bt_irq_wl;
71 struct delayed_work bt_sleep_delay_work;
74 static struct rfkill_rk_data *g_rfkill = NULL;
76 static const char bt_name[] =
77 #if defined (CONFIG_BCM4330)
78 #if defined (CONFIG_BT_MODULE_NH660)
83 #elif defined (CONFIG_RK903)
84 #if defined(CONFIG_RKWIFI_26M)
89 #elif defined(CONFIG_BCM4329)
91 #elif defined(CONFIG_MV8787)
93 #elif defined(CONFIG_AP6210)
94 #if defined(CONFIG_RKWIFI_26M)
99 #elif defined(CONFIG_AP6330)
101 #elif defined(CONFIG_AP6476)
103 #elif defined(CONFIG_AP6493)
105 #elif defined(CONFIG_AP6441)
107 #elif defined(CONFIG_AP6335)
109 #elif defined(CONFIG_GB86302I)
116 static irqreturn_t rfkill_rk_wake_host_irq(int irq, void *dev)
118 struct rfkill_rk_data *rfkill = dev;
119 LOG("BT_WAKE_HOST IRQ fired\n");
121 DBG("BT IRQ wakeup, request %dms wakelock\n", BT_IRQ_WAKELOCK_TIMEOUT);
123 wake_lock_timeout(&rfkill->bt_irq_wl,
124 msecs_to_jiffies(BT_IRQ_WAKELOCK_TIMEOUT));
129 static int rfkill_rk_setup_gpio(struct platform_device *pdev, struct rfkill_rk_gpio* gpio,
130 const char* prefix, const char* name)
132 if (gpio_is_valid(gpio->io)) {
134 sprintf(gpio->name, "%s_%s", prefix, name);
135 ret = devm_gpio_request(&pdev->dev, gpio->io, gpio->name);
137 LOG("Failed to get %s gpio.\n", gpio->name);
145 static int rfkill_rk_setup_wake_irq(struct rfkill_rk_data* rfkill)
148 struct rfkill_rk_irq* irq = &(rfkill->pdata->wake_host_irq);
150 ret = rfkill_rk_setup_gpio(rfkill->pdev, &irq->gpio, rfkill->pdata->name, "wake_host");
152 if (gpio_is_valid(irq->gpio.io))
154 //ret = gpio_pull_updown(irq->gpio.io, (irq->gpio.enable==GPIO_ACTIVE_LOW)?GPIOPullUp:GPIOPullDown);
155 //if (ret) goto fail2;
156 LOG("Request irq for bt wakeup host\n");
157 irq->irq = gpio_to_irq(irq->gpio.io);
158 sprintf(irq->name, "%s_irq", irq->gpio.name);
159 ret = request_irq(irq->irq,
160 rfkill_rk_wake_host_irq,
161 (irq->gpio.enable==GPIO_ACTIVE_LOW)?IRQF_TRIGGER_FALLING:IRQF_TRIGGER_RISING,
165 LOG("** disable irq\n");
166 disable_irq(irq->irq);
167 ret = enable_irq_wake(irq->irq);
174 free_irq(irq->gpio.io, rfkill);
176 gpio_free(irq->gpio.io);
181 static inline void rfkill_rk_sleep_bt_internal(struct rfkill_rk_data *rfkill, bool sleep)
183 struct rfkill_rk_gpio *wake = &rfkill->pdata->wake_gpio;
185 DBG("*** bt sleep: %d ***\n", sleep);
186 #ifndef CONFIG_BK3515A_COMBO
187 gpio_direction_output(wake->io, sleep?!wake->enable:wake->enable);
191 DBG("HOST_UART0_TX pull down 10us\n");
192 if (rfkill_rk_setup_gpio(rfkill->pdev, wake, rfkill->pdata->name, "wake") != 0) {
196 gpio_direction_output(wake->io, wake->enable);
198 gpio_direction_output(wake->io, !wake->enable);
205 static void rfkill_rk_delay_sleep_bt(struct work_struct *work)
207 struct rfkill_rk_data *rfkill = NULL;
208 DBG("Enter %s\n",__FUNCTION__);
210 rfkill = container_of(work, struct rfkill_rk_data, bt_sleep_delay_work.work);
212 rfkill_rk_sleep_bt_internal(rfkill, BT_SLEEP);
215 void rfkill_rk_sleep_bt(bool sleep)
217 struct rfkill_rk_data *rfkill = g_rfkill;
218 struct rfkill_rk_gpio *wake;
220 DBG("Enter %s\n",__FUNCTION__);
224 LOG("*** RFKILL is empty???\n");
228 wake = &rfkill->pdata->wake_gpio;
229 if (!gpio_is_valid(wake->io))
231 DBG("*** Not support bt wakeup and sleep\n");
235 ret = cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
237 rfkill_rk_sleep_bt_internal(rfkill, sleep);
239 #ifdef CONFIG_BT_AUTOSLEEP
240 if (sleep==BT_WAKEUP)
242 schedule_delayed_work(&rfkill->bt_sleep_delay_work,
243 msecs_to_jiffies(BT_WAKEUP_TIMEOUT));
247 EXPORT_SYMBOL(rfkill_rk_sleep_bt);
249 static int bt_power_state = 0;
250 int rfkill_get_bt_power_state(int *power, bool *toggle)
252 struct rfkill_rk_data *mrfkill = g_rfkill;
254 if (mrfkill == NULL) {
255 LOG("%s: rfkill-bt driver has not Successful initialized\n", __func__);
259 *toggle = mrfkill->pdata->power_toggle;
260 *power = bt_power_state;
265 static int rfkill_rk_set_power(void *data, bool blocked)
267 struct rfkill_rk_data *rfkill = data;
268 struct rfkill_rk_gpio *poweron = &rfkill->pdata->poweron_gpio;
269 struct rfkill_rk_gpio *reset = &rfkill->pdata->reset_gpio;
270 #if defined(CONFIG_AP6210) || defined(CONFIG_AP6335)
271 struct rfkill_rk_gpio* rts = &rfkill->pdata->rts_gpio;
272 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
274 int power = 0; bool toggle = false;
276 DBG("Enter %s\n", __func__);
278 DBG("Set blocked:%d\n", blocked);
280 toggle = rfkill->pdata->power_toggle;
282 if(!rfkill_get_wifi_power_state(&power) && power == 1) {
283 LOG("%s: bt shouldn't control the power, it was enabled by wifi!\n", __func__);
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);
295 gpio_direction_output(poweron->io, poweron->enable);
298 if (gpio_is_valid(reset->io))
300 gpio_direction_output(reset->io, !reset->enable);
302 gpio_direction_output(reset->io, reset->enable);
304 #if defined(CONFIG_AP6210) || defined(CONFIG_AP6335)
305 if (pinctrl != NULL && gpio_is_valid(rts->io))
307 pinctrl_select_state(pinctrl, rts->gpio_state);
308 LOG("ENABLE UART_RTS\n");
309 gpio_direction_output(rts->io, rts->enable);
311 LOG("DISABLE UART_RTS\n");
312 gpio_direction_output(rts->io, !rts->enable);
313 pinctrl_select_state(pinctrl, rts->default_state);
317 LOG("bt turn on power\n");
319 if (gpio_is_valid(poweron->io))
321 gpio_direction_output(poweron->io, !poweron->enable);
326 LOG("bt shut off power\n");
327 if (gpio_is_valid(reset->io))
329 gpio_direction_output(reset->io, !reset->enable);/* bt reset active*/
337 static int rfkill_rk_pm_prepare(struct device *dev)
339 struct rfkill_rk_data *rfkill = g_rfkill;
340 struct rfkill_rk_gpio* rts;
341 struct rfkill_rk_irq* wake_host_irq;
342 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
344 DBG("Enter %s\n",__FUNCTION__);
349 rts = &rfkill->pdata->rts_gpio;
350 wake_host_irq = &rfkill->pdata->wake_host_irq;
352 //To prevent uart to receive bt data when suspended
353 if (pinctrl != NULL && gpio_is_valid(rts->io))
355 DBG("Disable UART_RTS\n");
356 pinctrl_select_state(pinctrl, rts->gpio_state);
357 gpio_direction_output(rts->io, !rts->enable);
360 #ifdef CONFIG_BT_AUTOSLEEP
361 rfkill_rk_sleep_bt(BT_SLEEP);
364 // enable bt wakeup host
365 if (gpio_is_valid(wake_host_irq->gpio.io))
367 DBG("enable irq for bt wakeup host\n");
368 enable_irq(wake_host_irq->irq);
371 #ifdef CONFIG_RFKILL_RESET
372 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
373 rfkill_rk_set_power(rfkill, BT_BLOCKED);
379 static void rfkill_rk_pm_complete(struct device *dev)
381 struct rfkill_rk_data *rfkill = g_rfkill;
382 struct rfkill_rk_irq* wake_host_irq;
383 struct rfkill_rk_gpio* rts;
384 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
386 DBG("Enter %s\n",__FUNCTION__);
391 wake_host_irq = &rfkill->pdata->wake_host_irq;
392 rts = &rfkill->pdata->rts_gpio;
394 if (gpio_is_valid(wake_host_irq->gpio.io))
396 LOG("** disable irq\n");
397 disable_irq(wake_host_irq->irq);
400 if (pinctrl != NULL && gpio_is_valid(rts->io))
402 DBG("Enable UART_RTS\n");
403 gpio_direction_output(rts->io, rts->enable);
404 pinctrl_select_state(pinctrl, rts->default_state);
408 static const struct rfkill_ops rfkill_rk_ops = {
409 .set_block = rfkill_rk_set_power,
412 #define PROC_DIR "bluetooth/sleep"
414 static struct proc_dir_entry *bluetooth_dir, *sleep_dir;
416 static int bluesleep_read_proc_lpm(struct file *file, char __user *buffer,
417 size_t count, loff_t *data)
419 return sprintf(buffer, "unsupported to read\n");
422 static int bluesleep_write_proc_lpm(struct file *file, const char __user *buffer,
423 size_t count, loff_t *data)
428 static int bluesleep_read_proc_btwrite(struct file *file, char __user *buffer,
429 size_t count, loff_t *data)
431 return sprintf(buffer, "unsupported to read\n");
434 static int bluesleep_write_proc_btwrite(struct file *file, const char __user *buffer,
435 size_t count, loff_t *data)
442 if (copy_from_user(&b, buffer, 1))
445 DBG("btwrite %c\n", b);
448 rfkill_rk_sleep_bt(BT_WAKEUP);
455 static int bluetooth_platdata_parse_dt(struct device *dev,
456 struct rfkill_rk_platform_data *data)
458 struct device_node *node = dev->of_node;
460 enum of_gpio_flags flags;
465 memset(data, 0, sizeof(*data));
467 if (of_find_property(node, "wifi-bt-power-toggle", NULL)) {
468 data->power_toggle = true;
469 LOG("%s: get property wifi-bt-power-toggle.\n", __func__);
471 data->power_toggle = false;
474 gpio = of_get_named_gpio_flags(node, "uart_rts_gpios", 0, &flags);
475 if (gpio_is_valid(gpio)) {
476 data->rts_gpio.io = gpio;
477 data->rts_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
478 LOG("%s: get property: uart_rts_gpios = %d.\n", __func__, gpio);
479 data->pinctrl = devm_pinctrl_get(dev);
480 if (!IS_ERR(data->pinctrl)) {
481 data->rts_gpio.default_state = pinctrl_lookup_state(data->pinctrl, "default");
482 data->rts_gpio.gpio_state = pinctrl_lookup_state(data->pinctrl, "rts_gpio");
484 data->pinctrl = NULL;
485 LOG("%s: dts does't define the uart rts iomux.\n", __func__);
489 data->pinctrl = NULL;
490 LOG("%s: uart_rts_gpios is unvalid.\n", __func__);
494 gpio = of_get_named_gpio_flags(node, "BT,power_gpio", 0, &flags);
495 if (gpio_is_valid(gpio)){
496 data->poweron_gpio.io = gpio;
497 data->poweron_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
498 LOG("%s: get property: BT,power_gpio = %d.\n", __func__, gpio);
499 } else data->poweron_gpio.io = -1;
500 gpio = of_get_named_gpio_flags(node, "BT,reset_gpio", 0, &flags);
501 if (gpio_is_valid(gpio)){
502 data->reset_gpio.io = gpio;
503 data->reset_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
504 LOG("%s: get property: BT,reset_gpio = %d.\n", __func__, gpio);
505 } else data->reset_gpio.io = -1;
506 gpio = of_get_named_gpio_flags(node, "BT,wake_gpio", 0, &flags);
507 if (gpio_is_valid(gpio)){
508 data->wake_gpio.io = gpio;
509 data->wake_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
510 LOG("%s: get property: BT,wake_gpio = %d.\n", __func__, gpio);
511 } else data->wake_gpio.io = -1;
512 gpio = of_get_named_gpio_flags(node, "BT,wake_host_irq", 0, &flags);
513 if (gpio_is_valid(gpio)) {
514 data->wake_host_irq.gpio.io = gpio;
515 data->wake_host_irq.gpio.enable = flags;
516 LOG("%s: get property: BT,wake_host_irq = %d.\n", __func__, gpio);
517 } else data->wake_host_irq.gpio.io = -1;
523 static const struct file_operations bluesleep_lpm = {
524 .owner = THIS_MODULE,
525 .read = bluesleep_read_proc_lpm,
526 .write = bluesleep_write_proc_lpm,
529 static const struct file_operations bluesleep_btwrite = {
530 .owner = THIS_MODULE,
531 .read = bluesleep_read_proc_btwrite,
532 .write = bluesleep_write_proc_btwrite,
535 static int rfkill_rk_probe(struct platform_device *pdev)
537 struct rfkill_rk_data *rfkill;
538 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
540 struct proc_dir_entry *ent;
542 DBG("Enter %s\n", __func__);
546 pdata = devm_kzalloc(&pdev->dev, sizeof(struct rfkill_rk_platform_data), GFP_KERNEL);
550 ret = bluetooth_platdata_parse_dt(&pdev->dev, pdata);
553 LOG("%s: No platform data specified\n", __func__);
560 pdata->name = (char*)bt_name;
561 pdata->type = RFKILL_TYPE_BLUETOOTH;
563 rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
569 rfkill->pdata = pdata;
573 bluetooth_dir = proc_mkdir("bluetooth", NULL);
574 if (bluetooth_dir == NULL) {
575 LOG("Unable to create /proc/bluetooth directory");
579 sleep_dir = proc_mkdir("sleep", bluetooth_dir);
580 if (sleep_dir == NULL) {
581 LOG("Unable to create /proc/%s directory", PROC_DIR);
585 /* read/write proc entries */
586 ent = proc_create("lpm", 0, sleep_dir, &bluesleep_lpm);
588 LOG("Unable to create /proc/%s/lpm entry", PROC_DIR);
593 /* read/write proc entries */
594 ent = proc_create("btwrite", 0, sleep_dir, &bluesleep_btwrite);
596 LOG("Unable to create /proc/%s/btwrite entry", PROC_DIR);
603 ret = rfkill_rk_setup_gpio(pdev, &pdata->poweron_gpio, pdata->name, "poweron");
604 if (ret) goto fail_gpio;
606 ret = rfkill_rk_setup_gpio(pdev, &pdata->reset_gpio, pdata->name, "reset");
607 if (ret) goto fail_gpio;
609 ret = rfkill_rk_setup_gpio(pdev, &pdata->wake_gpio, pdata->name, "wake");
610 if (ret) goto fail_gpio;
612 ret = rfkill_rk_setup_gpio(pdev, &pdata->rts_gpio, rfkill->pdata->name, "rts");
613 if (ret) goto fail_gpio;
615 wake_lock_init(&(rfkill->bt_irq_wl), WAKE_LOCK_SUSPEND, "rfkill_rk_irq_wl");
617 ret = rfkill_rk_setup_wake_irq(rfkill);
618 if (ret) goto fail_gpio;
620 DBG("setup rfkill\n");
621 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
622 &rfkill_rk_ops, rfkill);
623 if (!rfkill->rfkill_dev)
626 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
627 ret = rfkill_register(rfkill->rfkill_dev);
631 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work, rfkill_rk_delay_sleep_bt);
633 //rfkill_rk_set_power(rfkill, BT_BLOCKED);
635 if (gpio_is_valid(pdata->poweron_gpio.io))
637 gpio_direction_output(pdata->poweron_gpio.io, !pdata->poweron_gpio.enable);
639 if (gpio_is_valid(pdata->reset_gpio.io))
641 gpio_direction_output(pdata->reset_gpio.io, !pdata->reset_gpio.enable);
644 platform_set_drvdata(pdev, rfkill);
646 LOG("%s device registered.\n", pdata->name);
651 rfkill_destroy(rfkill->rfkill_dev);
655 remove_proc_entry("btwrite", sleep_dir);
656 remove_proc_entry("lpm", sleep_dir);
662 static int rfkill_rk_remove(struct platform_device *pdev)
664 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
666 LOG("Enter %s\n", __func__);
668 rfkill_unregister(rfkill->rfkill_dev);
669 rfkill_destroy(rfkill->rfkill_dev);
672 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
675 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
676 gpio_free(rfkill->pdata->rts_gpio.io);
678 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)){
679 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
680 #ifndef CONFIG_BK3515A_COMBO
681 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
685 #ifndef CONFIG_BK3515A_COMBO
686 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
687 gpio_free(rfkill->pdata->wake_gpio.io);
690 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
691 gpio_free(rfkill->pdata->reset_gpio.io);
693 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
694 gpio_free(rfkill->pdata->poweron_gpio.io);
702 static const struct dev_pm_ops rfkill_rk_pm_ops = {
703 .prepare = rfkill_rk_pm_prepare,
704 .complete = rfkill_rk_pm_complete,
708 static struct of_device_id bt_platdata_of_match[] = {
709 { .compatible = "bluetooth-platdata" },
712 MODULE_DEVICE_TABLE(of, bt_platdata_of_match);
715 static struct platform_driver rfkill_rk_driver = {
716 .probe = rfkill_rk_probe,
717 .remove = rfkill_rk_remove,
720 .owner = THIS_MODULE,
721 .pm = &rfkill_rk_pm_ops,
722 .of_match_table = of_match_ptr(bt_platdata_of_match),
726 static int __init rfkill_rk_init(void)
728 LOG("Enter %s\n", __func__);
729 return platform_driver_register(&rfkill_rk_driver);
732 static void __exit rfkill_rk_exit(void)
734 LOG("Enter %s\n", __func__);
735 platform_driver_unregister(&rfkill_rk_driver);
738 module_init(rfkill_rk_init);
739 module_exit(rfkill_rk_exit);
741 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.3");
742 MODULE_AUTHOR("cmy@rock-chips.com, gwl@rock-chips.com");
743 MODULE_LICENSE("GPL");