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/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>
34 #include <dt-bindings/gpio/gpio.h>
35 #include <uapi/linux/rfkill.h>
38 #include <linux/of_device.h>
39 #include <linux/of_gpio.h>
43 #define DBG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
48 #define LOG(x...) printk(KERN_INFO "[BT_RFKILL]: "x)
50 #define BT_WAKEUP_TIMEOUT 10000
51 #define BT_IRQ_WAKELOCK_TIMEOUT 10*1000
53 #define BT_BLOCKED true
54 #define BT_UNBLOCK false
56 #define BT_WAKEUP false
64 struct rfkill_rk_data {
65 struct rfkill_rk_platform_data *pdata;
66 struct platform_device *pdev;
67 struct rfkill *rfkill_dev;
68 struct wake_lock bt_irq_wl;
69 struct delayed_work bt_sleep_delay_work;
72 static struct rfkill_rk_data *g_rfkill = NULL;
74 static const char bt_name[] =
75 #if defined (CONFIG_BCM4330)
76 #if defined (CONFIG_BT_MODULE_NH660)
81 #elif defined (CONFIG_RK903)
82 #if defined(CONFIG_RKWIFI_26M)
87 #elif defined(CONFIG_BCM4329)
89 #elif defined(CONFIG_MV8787)
91 #elif defined(CONFIG_AP6210)
92 #if defined(CONFIG_RKWIFI_26M)
97 #elif defined(CONFIG_AP6330)
99 #elif defined(CONFIG_AP6476)
101 #elif defined(CONFIG_AP6493)
103 #elif defined(CONFIG_AP6441)
105 #elif defined(CONFIG_AP6335)
107 #elif defined(CONFIG_GB86302I)
114 static irqreturn_t rfkill_rk_wake_host_irq(int irq, void *dev)
116 struct rfkill_rk_data *rfkill = dev;
117 LOG("BT_WAKE_HOST IRQ fired\n");
119 DBG("BT IRQ wakeup, request %dms wakelock\n", BT_IRQ_WAKELOCK_TIMEOUT);
121 wake_lock_timeout(&rfkill->bt_irq_wl,
122 msecs_to_jiffies(BT_IRQ_WAKELOCK_TIMEOUT));
127 static int rfkill_rk_setup_gpio(struct platform_device *pdev, struct rfkill_rk_gpio* gpio,
128 const char* prefix, const char* name)
130 if (gpio_is_valid(gpio->io)) {
132 sprintf(gpio->name, "%s_%s", prefix, name);
133 ret = devm_gpio_request(&pdev->dev, gpio->io, gpio->name);
135 LOG("Failed to get %s gpio.\n", gpio->name);
143 static int rfkill_rk_setup_wake_irq(struct rfkill_rk_data* rfkill)
146 struct rfkill_rk_irq* irq = &(rfkill->pdata->wake_host_irq);
148 ret = rfkill_rk_setup_gpio(rfkill->pdev, &irq->gpio, rfkill->pdata->name, "wake_host");
150 if (gpio_is_valid(irq->gpio.io))
152 //ret = gpio_pull_updown(irq->gpio.io, (irq->gpio.enable==GPIO_ACTIVE_LOW)?GPIOPullUp:GPIOPullDown);
153 //if (ret) goto fail2;
154 LOG("Request irq for bt wakeup host\n");
155 irq->irq = gpio_to_irq(irq->gpio.io);
156 sprintf(irq->name, "%s_irq", irq->gpio.name);
157 ret = request_irq(irq->irq,
158 rfkill_rk_wake_host_irq,
159 (irq->gpio.enable==GPIO_ACTIVE_LOW)?IRQF_TRIGGER_FALLING:IRQF_TRIGGER_RISING,
163 LOG("** disable irq\n");
164 disable_irq(irq->irq);
165 ret = enable_irq_wake(irq->irq);
172 free_irq(irq->gpio.io, rfkill);
174 gpio_free(irq->gpio.io);
179 static inline void rfkill_rk_sleep_bt_internal(struct rfkill_rk_data *rfkill, bool sleep)
181 struct rfkill_rk_gpio *wake = &rfkill->pdata->wake_gpio;
183 DBG("*** bt sleep: %d ***\n", sleep);
184 #ifndef CONFIG_BK3515A_COMBO
185 gpio_direction_output(wake->io, sleep?!wake->enable:wake->enable);
189 DBG("HOST_UART0_TX pull down 10us\n");
190 if (rfkill_rk_setup_gpio(rfkill->pdev, wake, rfkill->pdata->name, "wake") != 0) {
194 gpio_direction_output(wake->io, wake->enable);
196 gpio_direction_output(wake->io, !wake->enable);
203 static void rfkill_rk_delay_sleep_bt(struct work_struct *work)
205 struct rfkill_rk_data *rfkill = NULL;
206 DBG("Enter %s\n",__FUNCTION__);
208 rfkill = container_of(work, struct rfkill_rk_data, bt_sleep_delay_work.work);
210 rfkill_rk_sleep_bt_internal(rfkill, BT_SLEEP);
213 void rfkill_rk_sleep_bt(bool sleep)
215 struct rfkill_rk_data *rfkill = g_rfkill;
216 struct rfkill_rk_gpio *wake;
218 DBG("Enter %s\n",__FUNCTION__);
222 LOG("*** RFKILL is empty???\n");
226 wake = &rfkill->pdata->wake_gpio;
227 if (!gpio_is_valid(wake->io))
229 DBG("*** Not support bt wakeup and sleep\n");
233 ret = cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
235 rfkill_rk_sleep_bt_internal(rfkill, sleep);
237 #ifdef CONFIG_BT_AUTOSLEEP
238 if (sleep==BT_WAKEUP)
240 schedule_delayed_work(&rfkill->bt_sleep_delay_work,
241 msecs_to_jiffies(BT_WAKEUP_TIMEOUT));
245 EXPORT_SYMBOL(rfkill_rk_sleep_bt);
247 static int rfkill_rk_set_power(void *data, bool blocked)
249 struct rfkill_rk_data *rfkill = data;
250 struct rfkill_rk_gpio *poweron = &rfkill->pdata->poweron_gpio;
251 struct rfkill_rk_gpio *reset = &rfkill->pdata->reset_gpio;
252 #if defined(CONFIG_AP6210) || defined(CONFIG_AP6335)
253 struct rfkill_rk_gpio* rts = &rfkill->pdata->rts_gpio;
254 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
257 DBG("Enter %s\n", __func__);
259 DBG("Set blocked:%d\n", blocked);
261 if (false == blocked) {
262 rfkill_rk_sleep_bt(BT_WAKEUP); // ensure bt is wakeup
264 if (gpio_is_valid(poweron->io))
266 gpio_direction_output(poweron->io, !poweron->enable);
268 gpio_direction_output(poweron->io, poweron->enable);
271 if (gpio_is_valid(reset->io))
273 gpio_direction_output(reset->io, !reset->enable);
275 gpio_direction_output(reset->io, reset->enable);
278 #if defined(CONFIG_AP6210) || defined(CONFIG_AP6335)
279 if (gpio_is_valid(rts->io))
281 pinctrl_select_state(pinctrl, rts->gpio_state);
282 LOG("ENABLE UART_RTS\n");
283 gpio_direction_output(rts->io, rts->enable);
285 LOG("DISABLE UART_RTS\n");
286 gpio_direction_output(rts->io, !rts->enable);
287 pinctrl_select_state(pinctrl, rts->default_state);
291 LOG("bt turn on power\n");
293 if (gpio_is_valid(poweron->io))
295 gpio_direction_output(poweron->io, !poweron->enable);
299 LOG("bt shut off power\n");
300 if (gpio_is_valid(reset->io))
302 gpio_direction_output(reset->io, !reset->enable);/* bt reset active*/
310 static int rfkill_rk_pm_prepare(struct device *dev)
312 struct rfkill_rk_data *rfkill = g_rfkill;
313 struct rfkill_rk_gpio* rts;
314 struct rfkill_rk_irq* wake_host_irq;
315 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
317 DBG("Enter %s\n",__FUNCTION__);
322 rts = &rfkill->pdata->rts_gpio;
323 wake_host_irq = &rfkill->pdata->wake_host_irq;
325 //To prevent uart to receive bt data when suspended
326 if (gpio_is_valid(rts->io))
328 DBG("Disable UART_RTS\n");
329 //pinctrl_select_state(pinctrl, rts->gpio_state);
330 //gpio_direction_output(rts->io, !rts->enable);
333 #ifdef CONFIG_BT_AUTOSLEEP
334 rfkill_rk_sleep_bt(BT_SLEEP);
337 // enable bt wakeup host
338 if (gpio_is_valid(wake_host_irq->gpio.io))
340 DBG("enable irq for bt wakeup host\n");
341 enable_irq(wake_host_irq->irq);
344 #ifdef CONFIG_RFKILL_RESET
345 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
346 rfkill_rk_set_power(rfkill, BT_BLOCKED);
352 static void rfkill_rk_pm_complete(struct device *dev)
354 struct rfkill_rk_data *rfkill = g_rfkill;
355 struct rfkill_rk_irq* wake_host_irq;
356 struct rfkill_rk_gpio* rts;
357 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
359 DBG("Enter %s\n",__FUNCTION__);
364 wake_host_irq = &rfkill->pdata->wake_host_irq;
365 rts = &rfkill->pdata->rts_gpio;
367 if (gpio_is_valid(wake_host_irq->gpio.io))
369 LOG("** disable irq\n");
370 disable_irq(wake_host_irq->irq);
373 if (gpio_is_valid(rts->io))
375 DBG("Enable UART_RTS\n");
376 gpio_direction_output(rts->io, rts->enable);
377 pinctrl_select_state(pinctrl, rts->default_state);
381 static const struct rfkill_ops rfkill_rk_ops = {
382 .set_block = rfkill_rk_set_power,
385 #define PROC_DIR "bluetooth/sleep"
387 static struct proc_dir_entry *bluetooth_dir, *sleep_dir;
389 static int bluesleep_read_proc_lpm(char *page, char **start, off_t offset,
390 int count, int *eof, void *data)
393 return sprintf(page, "unsupported to read\n");
396 static int bluesleep_write_proc_lpm(struct file *file, const char *buffer,
397 unsigned long count, void *data)
402 static int bluesleep_read_proc_btwrite(char *page, char **start, off_t offset,
403 int count, int *eof, void *data)
406 return sprintf(page, "unsupported to read\n");
409 static int bluesleep_write_proc_btwrite(struct file *file, const char *buffer,
410 unsigned long count, void *data)
417 if (copy_from_user(&b, buffer, 1))
420 DBG("btwrite %c\n", b);
423 rfkill_rk_sleep_bt(BT_WAKEUP);
430 static int bluetooth_platdata_parse_dt(struct device *dev,
431 struct rfkill_rk_platform_data *data)
433 struct device_node *node = dev->of_node;
435 enum of_gpio_flags flags;
440 memset(data, 0, sizeof(*data));
442 if (of_find_property(node, "support_uart_rts_ctrl", NULL)) {
443 gpio = of_get_named_gpio_flags(node, "uart_rts_gpios", 0, &flags);
444 if (gpio_is_valid(gpio)) {
445 data->rts_gpio.io = gpio;
446 data->rts_gpio.enable = flags;
447 LOG("%s: get property: uart_rts_gpios = %d.\n", __func__, gpio);
448 data->pinctrl = devm_pinctrl_get(dev);
449 if (!IS_ERR(data->pinctrl)) {
450 data->rts_gpio.default_state = pinctrl_lookup_state(data->pinctrl, "default");
452 LOG("%s: dts does't define the uart rts iomux.\n", __func__);
456 LOG("%s: uart_rts_gpios is unvalid.\n", __func__);
461 gpio = of_get_named_gpio_flags(node, "BT,power_gpio", 0, &flags);
462 if (gpio_is_valid(gpio)){
463 data->poweron_gpio.io = gpio;
464 data->poweron_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
465 LOG("%s: get property: BT,power_gpio = %d.\n", __func__, gpio);
467 gpio = of_get_named_gpio_flags(node, "BT,reset_gpio", 0, &flags);
468 if (gpio_is_valid(gpio)){
469 data->reset_gpio.io = gpio;
470 data->reset_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
471 LOG("%s: get property: BT,reset_gpio = %d.\n", __func__, gpio);
473 gpio = of_get_named_gpio_flags(node, "BT,wake_gpio", 0, &flags);
474 if (gpio_is_valid(gpio)){
475 data->wake_gpio.io = gpio;
476 data->wake_gpio.enable = (flags == GPIO_ACTIVE_HIGH)? 1:0;
477 LOG("%s: get property: BT,wake_gpio = %d.\n", __func__, gpio);
479 gpio = of_get_named_gpio_flags(node, "BT,wake_host_irq", 0, &flags);
480 if (gpio_is_valid(gpio)) {
481 data->wake_host_irq.gpio.io = gpio;
482 data->wake_host_irq.gpio.enable = flags;
483 LOG("%s: get property: BT,wake_host_irq = %d.\n", __func__, gpio);
490 static const struct file_operations bluesleep_lpm = {
491 .owner = THIS_MODULE,
492 .read = bluesleep_read_proc_lpm,
493 .write = bluesleep_write_proc_lpm,
496 static const struct file_operations bluesleep_btwrite = {
497 .owner = THIS_MODULE,
498 .read = bluesleep_read_proc_btwrite,
499 .write = bluesleep_write_proc_btwrite,
502 static int rfkill_rk_probe(struct platform_device *pdev)
504 struct rfkill_rk_data *rfkill;
505 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
507 struct proc_dir_entry *ent;
509 DBG("Enter %s\n", __func__);
513 pdata = devm_kzalloc(&pdev->dev, sizeof(struct rfkill_rk_platform_data), GFP_KERNEL);
517 ret = bluetooth_platdata_parse_dt(&pdev->dev, pdata);
520 LOG("%s: No platform data specified\n", __func__);
527 pdata->name = (char*)bt_name;
528 pdata->type = RFKILL_TYPE_BLUETOOTH;
530 rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
536 rfkill->pdata = pdata;
540 bluetooth_dir = proc_mkdir("bluetooth", NULL);
541 if (bluetooth_dir == NULL) {
542 LOG("Unable to create /proc/bluetooth directory");
546 sleep_dir = proc_mkdir("sleep", bluetooth_dir);
547 if (sleep_dir == NULL) {
548 LOG("Unable to create /proc/%s directory", PROC_DIR);
552 /* read/write proc entries */
553 ent = proc_create("lpm", 0, sleep_dir, &bluesleep_lpm);
555 LOG("Unable to create /proc/%s/lpm entry", PROC_DIR);
560 /* read/write proc entries */
561 ent = proc_create("btwrite", 0, sleep_dir, &bluesleep_btwrite);
563 LOG("Unable to create /proc/%s/btwrite entry", PROC_DIR);
570 ret = rfkill_rk_setup_gpio(pdev, &pdata->poweron_gpio, pdata->name, "poweron");
571 if (ret) goto fail_gpio;
573 ret = rfkill_rk_setup_gpio(pdev, &pdata->reset_gpio, pdata->name, "reset");
574 if (ret) goto fail_gpio;
576 ret = rfkill_rk_setup_gpio(pdev, &pdata->wake_gpio, pdata->name, "wake");
577 if (ret) goto fail_gpio;
579 ret = rfkill_rk_setup_wake_irq(rfkill);
580 if (ret) goto fail_gpio;
582 //ret = rfkill_rk_setup_gpio(pdev, &pdata->rts_gpio, rfkill->pdata->name, "rts");
583 //if (ret) goto fail_gpio;
585 DBG("setup rfkill\n");
586 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
587 &rfkill_rk_ops, rfkill);
588 if (!rfkill->rfkill_dev)
591 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
592 ret = rfkill_register(rfkill->rfkill_dev);
596 wake_lock_init(&(rfkill->bt_irq_wl), WAKE_LOCK_SUSPEND, "rfkill_rk_irq_wl");
597 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work, rfkill_rk_delay_sleep_bt);
599 rfkill_rk_set_power(rfkill, BT_BLOCKED);
601 platform_set_drvdata(pdev, rfkill);
603 LOG("%s device registered.\n", pdata->name);
608 rfkill_destroy(rfkill->rfkill_dev);
612 remove_proc_entry("btwrite", sleep_dir);
613 remove_proc_entry("lpm", sleep_dir);
619 static int rfkill_rk_remove(struct platform_device *pdev)
621 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
623 LOG("Enter %s\n", __func__);
625 rfkill_unregister(rfkill->rfkill_dev);
626 rfkill_destroy(rfkill->rfkill_dev);
629 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
632 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
633 gpio_free(rfkill->pdata->rts_gpio.io);
635 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)){
636 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
637 #ifndef CONFIG_BK3515A_COMBO
638 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
642 #ifndef CONFIG_BK3515A_COMBO
643 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
644 gpio_free(rfkill->pdata->wake_gpio.io);
647 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
648 gpio_free(rfkill->pdata->reset_gpio.io);
650 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
651 gpio_free(rfkill->pdata->poweron_gpio.io);
659 static const struct dev_pm_ops rfkill_rk_pm_ops = {
660 .prepare = rfkill_rk_pm_prepare,
661 .complete = rfkill_rk_pm_complete,
665 static struct of_device_id bt_platdata_of_match[] = {
666 { .compatible = "bluetooth-platdata" },
669 MODULE_DEVICE_TABLE(of, bt_platdata_of_match);
672 static struct platform_driver rfkill_rk_driver = {
673 .probe = rfkill_rk_probe,
674 .remove = rfkill_rk_remove,
677 .owner = THIS_MODULE,
678 .pm = &rfkill_rk_pm_ops,
679 .of_match_table = of_match_ptr(bt_platdata_of_match),
683 static int __init rfkill_rk_init(void)
685 LOG("Enter %s\n", __func__);
686 return platform_driver_register(&rfkill_rk_driver);
689 static void __exit rfkill_rk_exit(void)
691 LOG("Enter %s\n", __func__);
692 platform_driver_unregister(&rfkill_rk_driver);
695 module_init(rfkill_rk_init);
696 module_exit(rfkill_rk_exit);
698 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.3");
699 MODULE_AUTHOR("cmy@rock-chips.com, gwl@rock-chips.com");
700 MODULE_LICENSE("GPL");