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, vref_ctrl_enable = 0;
277 DBG("Enter %s\n", __func__);
279 DBG("Set blocked:%d\n", blocked);
281 toggle = rfkill->pdata->power_toggle;
282 if (!rfkill_get_wifi_power_state(&power, &vref_ctrl_enable)) {
283 if (true == toggle && 1 == power) {
284 LOG("%s: bt shouldn't control the power, it was enabled by wifi!\n", __func__);
288 LOG("%s: cannot get wifi power state!\n", __func__);
292 if (false == blocked) {
293 if (1 == vref_ctrl_enable && 0 == power)
294 rockchip_wifi_ref_voltage(1);
296 rfkill_rk_sleep_bt(BT_WAKEUP); // ensure bt is wakeup
298 if (gpio_is_valid(poweron->io))
300 gpio_direction_output(poweron->io, !poweron->enable);
302 gpio_direction_output(poweron->io, poweron->enable);
305 if (gpio_is_valid(reset->io))
307 gpio_direction_output(reset->io, !reset->enable);
309 gpio_direction_output(reset->io, reset->enable);
311 #if defined(CONFIG_AP6210) || defined(CONFIG_AP6335)
312 if (pinctrl != NULL && gpio_is_valid(rts->io))
314 pinctrl_select_state(pinctrl, rts->gpio_state);
315 LOG("ENABLE UART_RTS\n");
316 gpio_direction_output(rts->io, rts->enable);
318 LOG("DISABLE UART_RTS\n");
319 gpio_direction_output(rts->io, !rts->enable);
320 pinctrl_select_state(pinctrl, rts->default_state);
324 LOG("bt turn on power\n");
326 if (gpio_is_valid(poweron->io))
328 gpio_direction_output(poweron->io, !poweron->enable);
333 LOG("bt shut off power\n");
334 if (gpio_is_valid(reset->io))
336 gpio_direction_output(reset->io, !reset->enable);/* bt reset active*/
340 if (1 == vref_ctrl_enable && 0 == power)
341 rockchip_wifi_ref_voltage(0);
347 static int rfkill_rk_pm_prepare(struct device *dev)
349 struct rfkill_rk_data *rfkill = g_rfkill;
350 struct rfkill_rk_gpio* rts;
351 struct rfkill_rk_irq* wake_host_irq;
352 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
354 DBG("Enter %s\n",__FUNCTION__);
359 rts = &rfkill->pdata->rts_gpio;
360 wake_host_irq = &rfkill->pdata->wake_host_irq;
362 //To prevent uart to receive bt data when suspended
363 if (pinctrl != NULL && gpio_is_valid(rts->io))
365 DBG("Disable UART_RTS\n");
366 pinctrl_select_state(pinctrl, rts->gpio_state);
367 gpio_direction_output(rts->io, !rts->enable);
370 #ifdef CONFIG_BT_AUTOSLEEP
371 rfkill_rk_sleep_bt(BT_SLEEP);
374 // enable bt wakeup host
375 if (gpio_is_valid(wake_host_irq->gpio.io))
377 DBG("enable irq for bt wakeup host\n");
378 enable_irq(wake_host_irq->irq);
381 #ifdef CONFIG_RFKILL_RESET
382 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
383 rfkill_rk_set_power(rfkill, BT_BLOCKED);
389 static void rfkill_rk_pm_complete(struct device *dev)
391 struct rfkill_rk_data *rfkill = g_rfkill;
392 struct rfkill_rk_irq* wake_host_irq;
393 struct rfkill_rk_gpio* rts;
394 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
396 DBG("Enter %s\n",__FUNCTION__);
401 wake_host_irq = &rfkill->pdata->wake_host_irq;
402 rts = &rfkill->pdata->rts_gpio;
404 if (gpio_is_valid(wake_host_irq->gpio.io))
406 LOG("** disable irq\n");
407 disable_irq(wake_host_irq->irq);
410 if (pinctrl != NULL && gpio_is_valid(rts->io))
412 DBG("Enable UART_RTS\n");
413 gpio_direction_output(rts->io, rts->enable);
414 pinctrl_select_state(pinctrl, rts->default_state);
418 static const struct rfkill_ops rfkill_rk_ops = {
419 .set_block = rfkill_rk_set_power,
422 #define PROC_DIR "bluetooth/sleep"
424 static struct proc_dir_entry *bluetooth_dir, *sleep_dir;
426 static int bluesleep_read_proc_lpm(struct file *file, char __user *buffer,
427 size_t count, loff_t *data)
429 return sprintf(buffer, "unsupported to read\n");
432 static int bluesleep_write_proc_lpm(struct file *file, const char __user *buffer,
433 size_t count, loff_t *data)
438 static int bluesleep_read_proc_btwrite(struct file *file, char __user *buffer,
439 size_t count, loff_t *data)
441 return sprintf(buffer, "unsupported to read\n");
444 static int bluesleep_write_proc_btwrite(struct file *file, const char __user *buffer,
445 size_t count, loff_t *data)
452 if (copy_from_user(&b, buffer, 1))
455 DBG("btwrite %c\n", b);
458 rfkill_rk_sleep_bt(BT_WAKEUP);
465 static int bluetooth_platdata_parse_dt(struct device *dev,
466 struct rfkill_rk_platform_data *data)
468 struct device_node *node = dev->of_node;
470 enum of_gpio_flags flags;
475 memset(data, 0, sizeof(*data));
477 if (of_find_property(node, "wifi-bt-power-toggle", NULL)) {
478 data->power_toggle = true;
479 LOG("%s: get property wifi-bt-power-toggle.\n", __func__);
481 data->power_toggle = false;
484 gpio = of_get_named_gpio_flags(node, "uart_rts_gpios", 0, &flags);
485 if (gpio_is_valid(gpio)) {
486 data->rts_gpio.io = gpio;
487 data->rts_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
488 LOG("%s: get property: uart_rts_gpios = %d.\n", __func__, gpio);
489 data->pinctrl = devm_pinctrl_get(dev);
490 if (!IS_ERR(data->pinctrl)) {
491 data->rts_gpio.default_state = pinctrl_lookup_state(data->pinctrl, "default");
492 data->rts_gpio.gpio_state = pinctrl_lookup_state(data->pinctrl, "rts_gpio");
494 data->pinctrl = NULL;
495 LOG("%s: dts does't define the uart rts iomux.\n", __func__);
499 data->pinctrl = NULL;
500 LOG("%s: uart_rts_gpios is unvalid.\n", __func__);
504 gpio = of_get_named_gpio_flags(node, "BT,power_gpio", 0, &flags);
505 if (gpio_is_valid(gpio)){
506 data->poweron_gpio.io = gpio;
507 data->poweron_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
508 LOG("%s: get property: BT,power_gpio = %d.\n", __func__, gpio);
509 } else data->poweron_gpio.io = -1;
510 gpio = of_get_named_gpio_flags(node, "BT,reset_gpio", 0, &flags);
511 if (gpio_is_valid(gpio)){
512 data->reset_gpio.io = gpio;
513 data->reset_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
514 LOG("%s: get property: BT,reset_gpio = %d.\n", __func__, gpio);
515 } else data->reset_gpio.io = -1;
516 gpio = of_get_named_gpio_flags(node, "BT,wake_gpio", 0, &flags);
517 if (gpio_is_valid(gpio)){
518 data->wake_gpio.io = gpio;
519 data->wake_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
520 LOG("%s: get property: BT,wake_gpio = %d.\n", __func__, gpio);
521 } else data->wake_gpio.io = -1;
522 gpio = of_get_named_gpio_flags(node, "BT,wake_host_irq", 0, &flags);
523 if (gpio_is_valid(gpio)) {
524 data->wake_host_irq.gpio.io = gpio;
525 data->wake_host_irq.gpio.enable = flags;
526 LOG("%s: get property: BT,wake_host_irq = %d.\n", __func__, gpio);
527 } else data->wake_host_irq.gpio.io = -1;
533 static const struct file_operations bluesleep_lpm = {
534 .owner = THIS_MODULE,
535 .read = bluesleep_read_proc_lpm,
536 .write = bluesleep_write_proc_lpm,
539 static const struct file_operations bluesleep_btwrite = {
540 .owner = THIS_MODULE,
541 .read = bluesleep_read_proc_btwrite,
542 .write = bluesleep_write_proc_btwrite,
545 static int rfkill_rk_probe(struct platform_device *pdev)
547 struct rfkill_rk_data *rfkill;
548 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
550 struct proc_dir_entry *ent;
552 DBG("Enter %s\n", __func__);
556 pdata = devm_kzalloc(&pdev->dev, sizeof(struct rfkill_rk_platform_data), GFP_KERNEL);
560 ret = bluetooth_platdata_parse_dt(&pdev->dev, pdata);
563 LOG("%s: No platform data specified\n", __func__);
570 pdata->name = (char*)bt_name;
571 pdata->type = RFKILL_TYPE_BLUETOOTH;
573 rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
579 rfkill->pdata = pdata;
583 bluetooth_dir = proc_mkdir("bluetooth", NULL);
584 if (bluetooth_dir == NULL) {
585 LOG("Unable to create /proc/bluetooth directory");
589 sleep_dir = proc_mkdir("sleep", bluetooth_dir);
590 if (sleep_dir == NULL) {
591 LOG("Unable to create /proc/%s directory", PROC_DIR);
595 /* read/write proc entries */
596 ent = proc_create("lpm", 0, sleep_dir, &bluesleep_lpm);
598 LOG("Unable to create /proc/%s/lpm entry", PROC_DIR);
603 /* read/write proc entries */
604 ent = proc_create("btwrite", 0, sleep_dir, &bluesleep_btwrite);
606 LOG("Unable to create /proc/%s/btwrite entry", PROC_DIR);
613 ret = rfkill_rk_setup_gpio(pdev, &pdata->poweron_gpio, pdata->name, "poweron");
614 if (ret) goto fail_gpio;
616 ret = rfkill_rk_setup_gpio(pdev, &pdata->reset_gpio, pdata->name, "reset");
617 if (ret) goto fail_gpio;
619 ret = rfkill_rk_setup_gpio(pdev, &pdata->wake_gpio, pdata->name, "wake");
620 if (ret) goto fail_gpio;
622 ret = rfkill_rk_setup_gpio(pdev, &pdata->rts_gpio, rfkill->pdata->name, "rts");
623 if (ret) goto fail_gpio;
625 wake_lock_init(&(rfkill->bt_irq_wl), WAKE_LOCK_SUSPEND, "rfkill_rk_irq_wl");
627 ret = rfkill_rk_setup_wake_irq(rfkill);
628 if (ret) goto fail_gpio;
630 DBG("setup rfkill\n");
631 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
632 &rfkill_rk_ops, rfkill);
633 if (!rfkill->rfkill_dev)
636 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
637 ret = rfkill_register(rfkill->rfkill_dev);
641 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work, rfkill_rk_delay_sleep_bt);
643 //rfkill_rk_set_power(rfkill, BT_BLOCKED);
645 if (gpio_is_valid(pdata->poweron_gpio.io))
647 gpio_direction_output(pdata->poweron_gpio.io, !pdata->poweron_gpio.enable);
649 if (gpio_is_valid(pdata->reset_gpio.io))
651 gpio_direction_output(pdata->reset_gpio.io, !pdata->reset_gpio.enable);
654 platform_set_drvdata(pdev, rfkill);
656 LOG("%s device registered.\n", pdata->name);
661 rfkill_destroy(rfkill->rfkill_dev);
665 remove_proc_entry("btwrite", sleep_dir);
666 remove_proc_entry("lpm", sleep_dir);
672 static int rfkill_rk_remove(struct platform_device *pdev)
674 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
676 LOG("Enter %s\n", __func__);
678 rfkill_unregister(rfkill->rfkill_dev);
679 rfkill_destroy(rfkill->rfkill_dev);
682 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
685 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
686 gpio_free(rfkill->pdata->rts_gpio.io);
688 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)){
689 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
690 #ifndef CONFIG_BK3515A_COMBO
691 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
695 #ifndef CONFIG_BK3515A_COMBO
696 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
697 gpio_free(rfkill->pdata->wake_gpio.io);
700 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
701 gpio_free(rfkill->pdata->reset_gpio.io);
703 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
704 gpio_free(rfkill->pdata->poweron_gpio.io);
712 static const struct dev_pm_ops rfkill_rk_pm_ops = {
713 .prepare = rfkill_rk_pm_prepare,
714 .complete = rfkill_rk_pm_complete,
718 static struct of_device_id bt_platdata_of_match[] = {
719 { .compatible = "bluetooth-platdata" },
722 MODULE_DEVICE_TABLE(of, bt_platdata_of_match);
725 static struct platform_driver rfkill_rk_driver = {
726 .probe = rfkill_rk_probe,
727 .remove = rfkill_rk_remove,
730 .owner = THIS_MODULE,
731 .pm = &rfkill_rk_pm_ops,
732 .of_match_table = of_match_ptr(bt_platdata_of_match),
736 static int __init rfkill_rk_init(void)
738 LOG("Enter %s\n", __func__);
739 return platform_driver_register(&rfkill_rk_driver);
742 static void __exit rfkill_rk_exit(void)
744 LOG("Enter %s\n", __func__);
745 platform_driver_unregister(&rfkill_rk_driver);
748 module_init(rfkill_rk_init);
749 module_exit(rfkill_rk_exit);
751 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.3");
752 MODULE_AUTHOR("cmy@rock-chips.com, gwl@rock-chips.com");
753 MODULE_LICENSE("GPL");