1 /*
2 * Copyright (C) 2012 ROCKCHIP, Inc.
3 *
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.
7 *
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.
12 *
13 */
14 /* Rock-chips rfkill driver for bluetooth
15 *
16 */
17
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>
29 #include <asm/irq.h>
30 #include <linux/suspend.h>
31 #include <linux/proc_fs.h>
32 #include <linux/uaccess.h>
33 #include <linux/gpio.h>
34 #include <linux/fs.h>
35 #include <dt-bindings/gpio/gpio.h>
36 #include <uapi/linux/rfkill.h>
37 #ifdef CONFIG_OF
38 #include <linux/of.h>
39 #include <linux/of_device.h>
40 #include <linux/of_gpio.h>
41 #endif
42
43 #if 0
44 #define DBG(x...) pr_info("[BT_RFKILL]: " x)
45 #else
46 #define DBG(x...)
47 #endif
48
49 #define LOG(x...) pr_info("[BT_RFKILL]: " x)
50
51 #define BT_WAKEUP_TIMEOUT 10000
52 #define BT_IRQ_WAKELOCK_TIMEOUT (10 * 1000)
53
54 #define BT_BLOCKED true
55 #define BT_UNBLOCK false
56 #define BT_SLEEP true
57 #define BT_WAKEUP false
58
59 enum {
60 IOMUX_FNORMAL = 0,
61 IOMUX_FGPIO,
62 IOMUX_FMUX,
63 };
64
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;
71 int irq_req;
72 };
73
74 static struct rfkill_rk_data *g_rfkill = NULL;
75
76 static const char bt_name[] =
77 #if defined(CONFIG_BCM4330)
78 #if defined(CONFIG_BT_MODULE_NH660)
79 "nh660"
80 #else
81 "bcm4330"
82 #endif
83 #elif defined(CONFIG_RK903)
84 #if defined(CONFIG_RKWIFI_26M)
85 "rk903_26M"
86 #else
87 "rk903"
88 #endif
89 #elif defined(CONFIG_BCM4329)
90 "bcm4329"
91 #elif defined(CONFIG_MV8787)
92 "mv8787"
93 #elif defined(CONFIG_AP6210)
94 #if defined(CONFIG_RKWIFI_26M)
95 "ap6210"
96 #else
97 "ap6210_24M"
98 #endif
99 #elif defined(CONFIG_AP6330)
100 "ap6330"
101 #elif defined(CONFIG_AP6476)
102 "ap6476"
103 #elif defined(CONFIG_AP6493)
104 "ap6493"
105 #elif defined(CONFIG_AP6441)
106 "ap6441"
107 #elif defined(CONFIG_AP6335)
108 "ap6335"
109 #elif defined(CONFIG_GB86302I)
110 "gb86302i"
111 #else
112 "bt_default"
113 #endif
114 ;
115
rfkill_rk_wake_host_irq(int irq,void * dev)116 static irqreturn_t rfkill_rk_wake_host_irq(int irq, void *dev)
117 {
118 struct rfkill_rk_data *rfkill = dev;
119
120 LOG("BT_WAKE_HOST IRQ fired\n");
121
122 DBG("BT IRQ wakeup, request %dms wakelock\n", BT_IRQ_WAKELOCK_TIMEOUT);
123
124 wake_lock_timeout(&rfkill->bt_irq_wl,
125 msecs_to_jiffies(BT_IRQ_WAKELOCK_TIMEOUT));
126
127 return IRQ_HANDLED;
128 }
129
rfkill_rk_setup_gpio(struct platform_device * pdev,struct rfkill_rk_gpio * gpio,const char * prefix,const char * name)130 static int rfkill_rk_setup_gpio(struct platform_device *pdev,
131 struct rfkill_rk_gpio *gpio, const char *prefix,
132 const char *name)
133 {
134 if (gpio_is_valid(gpio->io)) {
135 int ret = 0;
136
137 sprintf(gpio->name, "%s_%s", prefix, name);
138 ret = devm_gpio_request(&pdev->dev, gpio->io, gpio->name);
139 if (ret) {
140 LOG("Failed to get %s gpio.\n", gpio->name);
141 return -1;
142 }
143 }
144
145 return 0;
146 }
147
rfkill_rk_setup_wake_irq(struct rfkill_rk_data * rfkill,int flag)148 static int rfkill_rk_setup_wake_irq(struct rfkill_rk_data *rfkill, int flag)
149 {
150 int ret = 0;
151 struct rfkill_rk_irq *irq = &rfkill->pdata->wake_host_irq;
152
153 if (!flag) {
154 rfkill->irq_req = 0;
155 ret = rfkill_rk_setup_gpio(rfkill->pdev, &irq->gpio,
156 rfkill->pdata->name, "wake_host");
157 if (ret)
158 goto fail1;
159 }
160 if (gpio_is_valid(irq->gpio.io)) {
161 if (rfkill->irq_req) {
162 rfkill->irq_req = 0;
163 free_irq(irq->irq, rfkill);
164 }
165 LOG("Request irq for bt wakeup host\n");
166 irq->irq = gpio_to_irq(irq->gpio.io);
167 sprintf(irq->name, "%s_irq", irq->gpio.name);
168 ret = request_irq(irq->irq, rfkill_rk_wake_host_irq,
169 (irq->gpio.enable == GPIO_ACTIVE_LOW) ?
170 IRQF_TRIGGER_FALLING :
171 IRQF_TRIGGER_RISING,
172 irq->name, rfkill);
173 if (ret)
174 goto fail2;
175 rfkill->irq_req = 1;
176 LOG("** disable irq\n");
177 disable_irq(irq->irq);
178 ret = enable_irq_wake(irq->irq);
179 if (ret)
180 goto fail3;
181 }
182
183 return ret;
184
185 fail3:
186 free_irq(irq->irq, rfkill);
187 fail2:
188 gpio_free(irq->gpio.io);
189 fail1:
190 return ret;
191 }
192
rfkill_rk_sleep_bt_internal(struct rfkill_rk_data * rfkill,bool sleep)193 static inline void rfkill_rk_sleep_bt_internal(struct rfkill_rk_data *rfkill,
194 bool sleep)
195 {
196 struct rfkill_rk_gpio *wake = &rfkill->pdata->wake_gpio;
197
198 DBG("*** bt sleep: %d ***\n", sleep);
199 #ifndef CONFIG_BK3515A_COMBO
200 gpio_direction_output(wake->io, sleep ? !wake->enable : wake->enable);
201 #else
202 if (!sleep) {
203 DBG("HOST_UART0_TX pull down 10us\n");
204 if (rfkill_rk_setup_gpio(rfkill->pdev, wake,
205 rfkill->pdata->name, "wake") != 0) {
206 return;
207 }
208
209 gpio_direction_output(wake->io, wake->enable);
210 usleep_range(10, 20);
211 gpio_direction_output(wake->io, !wake->enable);
212
213 gpio_free(wake->io);
214 }
215 #endif
216 }
217
rfkill_rk_delay_sleep_bt(struct work_struct * work)218 static void rfkill_rk_delay_sleep_bt(struct work_struct *work)
219 {
220 struct rfkill_rk_data *rfkill = NULL;
221
222 DBG("Enter %s\n", __func__);
223
224 rfkill = container_of(work, struct rfkill_rk_data,
225 bt_sleep_delay_work.work);
226
227 rfkill_rk_sleep_bt_internal(rfkill, BT_SLEEP);
228 }
229
rfkill_rk_sleep_bt(bool sleep)230 void rfkill_rk_sleep_bt(bool sleep)
231 {
232 struct rfkill_rk_data *rfkill = g_rfkill;
233 struct rfkill_rk_gpio *wake;
234 bool ret;
235
236 DBG("Enter %s\n", __func__);
237
238 if (!rfkill) {
239 LOG("*** RFKILL is empty???\n");
240 return;
241 }
242
243 wake = &rfkill->pdata->wake_gpio;
244 if (!gpio_is_valid(wake->io)) {
245 DBG("*** Not support bt wakeup and sleep\n");
246 return;
247 }
248
249 ret = cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
250
251 rfkill_rk_sleep_bt_internal(rfkill, sleep);
252
253 #ifdef CONFIG_BT_AUTOSLEEP
254 if (sleep == BT_WAKEUP) {
255 schedule_delayed_work(&rfkill->bt_sleep_delay_work,
256 msecs_to_jiffies(BT_WAKEUP_TIMEOUT));
257 }
258 #endif
259 }
260 EXPORT_SYMBOL(rfkill_rk_sleep_bt);
261
262 static int bt_power_state = 0;
rfkill_get_bt_power_state(int * power,bool * toggle)263 int rfkill_get_bt_power_state(int *power, bool *toggle)
264 {
265 struct rfkill_rk_data *mrfkill = g_rfkill;
266
267 if (!mrfkill) {
268 LOG("%s: rfkill-bt driver has not Successful initialized\n",
269 __func__);
270 return -1;
271 }
272
273 *toggle = mrfkill->pdata->power_toggle;
274 *power = bt_power_state;
275
276 return 0;
277 }
278
rfkill_rk_set_power(void * data,bool blocked)279 static int rfkill_rk_set_power(void *data, bool blocked)
280 {
281 struct rfkill_rk_data *rfkill = data;
282 struct rfkill_rk_gpio *wake_host = &rfkill->pdata->wake_host_irq.gpio;
283 struct rfkill_rk_gpio *poweron = &rfkill->pdata->poweron_gpio;
284 struct rfkill_rk_gpio *reset = &rfkill->pdata->reset_gpio;
285 struct rfkill_rk_gpio *rts = &rfkill->pdata->rts_gpio;
286 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
287 int wifi_power = 0;
288 bool toggle = false;
289
290 DBG("Enter %s\n", __func__);
291
292 DBG("Set blocked:%d\n", blocked);
293
294 toggle = rfkill->pdata->power_toggle;
295
296 if (toggle) {
297 if (rfkill_get_wifi_power_state(&wifi_power)) {
298 LOG("%s: cannot get wifi power state!\n", __func__);
299 return -1;
300 }
301 }
302
303 DBG("%s: toggle = %s\n", __func__, toggle ? "true" : "false");
304
305 if (!blocked) {
306 if (toggle) {
307 rfkill_set_wifi_bt_power(1);
308 msleep(100);
309 }
310
311 rfkill_rk_sleep_bt(BT_WAKEUP); // ensure bt is wakeup
312
313 if (gpio_is_valid(wake_host->io)) {
314 LOG("%s: set bt wake_host high!\n", __func__);
315 gpio_direction_output(wake_host->io, 1);
316 msleep(20);
317 }
318
319 if (gpio_is_valid(poweron->io)) {
320 if (gpio_get_value(poweron->io) == !poweron->enable) {
321 gpio_direction_output(poweron->io,
322 !poweron->enable);
323 msleep(20);
324 gpio_direction_output(poweron->io,
325 poweron->enable);
326 msleep(20);
327 if (gpio_is_valid(wake_host->io))
328 gpio_direction_input(wake_host->io);
329 }
330 }
331
332 if (gpio_is_valid(reset->io)) {
333 if (gpio_get_value(reset->io) == !reset->enable) {
334 gpio_direction_output(reset->io,
335 !reset->enable);
336 msleep(20);
337 gpio_direction_output(reset->io, reset->enable);
338 }
339 }
340
341 if (pinctrl && gpio_is_valid(rts->io)) {
342 pinctrl_select_state(pinctrl, rts->gpio_state);
343 LOG("ENABLE UART_RTS\n");
344 gpio_direction_output(rts->io, rts->enable);
345 msleep(100);
346 LOG("DISABLE UART_RTS\n");
347 gpio_direction_output(rts->io, !rts->enable);
348 pinctrl_select_state(pinctrl, rts->default_state);
349 }
350
351 bt_power_state = 1;
352 LOG("bt turn on power\n");
353 rfkill_rk_setup_wake_irq(rfkill, 1);
354 } else {
355 if (gpio_is_valid(poweron->io)) {
356 if (gpio_get_value(poweron->io) == poweron->enable) {
357 gpio_direction_output(poweron->io,
358 !poweron->enable);
359 msleep(20);
360 }
361 }
362
363 bt_power_state = 0;
364 LOG("bt shut off power\n");
365 if (gpio_is_valid(reset->io)) {
366 if (gpio_get_value(reset->io) == reset->enable) {
367 gpio_direction_output(reset->io,
368 !reset->enable);
369 msleep(20);
370 }
371 }
372 if (toggle) {
373 if (!wifi_power) {
374 LOG("%s: bt will set vbat to low\n", __func__);
375 rfkill_set_wifi_bt_power(0);
376 } else {
377 LOG("%s: bt shouldn't control the vbat\n", __func__);
378 }
379 }
380 }
381
382 return 0;
383 }
384
rfkill_rk_pm_prepare(struct device * dev)385 static int rfkill_rk_pm_prepare(struct device *dev)
386 {
387 struct rfkill_rk_data *rfkill = g_rfkill;
388 struct rfkill_rk_gpio *rts;
389 struct rfkill_rk_irq *wake_host_irq;
390 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
391
392 DBG("Enter %s\n", __func__);
393
394 if (!rfkill)
395 return 0;
396
397 rts = &rfkill->pdata->rts_gpio;
398 wake_host_irq = &rfkill->pdata->wake_host_irq;
399
400 //To prevent uart to receive bt data when suspended
401 if (pinctrl && gpio_is_valid(rts->io)) {
402 DBG("Disable UART_RTS\n");
403 pinctrl_select_state(pinctrl, rts->gpio_state);
404 gpio_direction_output(rts->io, !rts->enable);
405 }
406
407 #ifdef CONFIG_BT_AUTOSLEEP
408 rfkill_rk_sleep_bt(BT_SLEEP);
409 #endif
410
411 // enable bt wakeup host
412 if (gpio_is_valid(wake_host_irq->gpio.io) && bt_power_state) {
413 DBG("enable irq for bt wakeup host\n");
414 enable_irq(wake_host_irq->irq);
415 }
416
417 #ifdef CONFIG_RFKILL_RESET
418 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
419 rfkill_rk_set_power(rfkill, BT_BLOCKED);
420 #endif
421
422 return 0;
423 }
424
rfkill_rk_pm_complete(struct device * dev)425 static void rfkill_rk_pm_complete(struct device *dev)
426 {
427 struct rfkill_rk_data *rfkill = g_rfkill;
428 struct rfkill_rk_irq *wake_host_irq;
429 struct rfkill_rk_gpio *rts;
430 struct pinctrl *pinctrl = rfkill->pdata->pinctrl;
431
432 DBG("Enter %s\n", __func__);
433
434 if (!rfkill)
435 return;
436
437 wake_host_irq = &rfkill->pdata->wake_host_irq;
438 rts = &rfkill->pdata->rts_gpio;
439
440 if (gpio_is_valid(wake_host_irq->gpio.io) && bt_power_state) {
441 LOG("** disable irq\n");
442 disable_irq(wake_host_irq->irq);
443 }
444
445 if (pinctrl && gpio_is_valid(rts->io)) {
446 DBG("Enable UART_RTS\n");
447 gpio_direction_output(rts->io, rts->enable);
448 pinctrl_select_state(pinctrl, rts->default_state);
449 }
450 }
451
452 static const struct rfkill_ops rfkill_rk_ops = {
453 .set_block = rfkill_rk_set_power,
454 };
455
456 #define PROC_DIR "bluetooth/sleep"
457
458 static struct proc_dir_entry *bluetooth_dir, *sleep_dir;
459
bluesleep_read_proc_lpm(struct file * file,char __user * buffer,size_t count,loff_t * data)460 static ssize_t bluesleep_read_proc_lpm(struct file *file, char __user *buffer,
461 size_t count, loff_t *data)
462 {
463 return sprintf(buffer, "unsupported to read\n");
464 }
465
bluesleep_write_proc_lpm(struct file * file,const char __user * buffer,size_t count,loff_t * data)466 static ssize_t bluesleep_write_proc_lpm(struct file *file,
467 const char __user *buffer, size_t count,
468 loff_t *data)
469 {
470 return count;
471 }
472
bluesleep_read_proc_btwrite(struct file * file,char __user * buffer,size_t count,loff_t * data)473 static ssize_t bluesleep_read_proc_btwrite(struct file *file,
474 char __user *buffer, size_t count,
475 loff_t *data)
476 {
477 return sprintf(buffer, "unsupported to read\n");
478 }
479
bluesleep_write_proc_btwrite(struct file * file,const char __user * buffer,size_t count,loff_t * data)480 static ssize_t bluesleep_write_proc_btwrite(struct file *file,
481 const char __user *buffer,
482 size_t count, loff_t *data)
483 {
484 char b;
485
486 if (count < 1)
487 return -EINVAL;
488
489 if (copy_from_user(&b, buffer, 1))
490 return -EFAULT;
491
492 DBG("btwrite %c\n", b);
493 /* HCI_DEV_WRITE */
494 if (b != '0')
495 rfkill_rk_sleep_bt(BT_WAKEUP);
496 else
497 rfkill_rk_sleep_bt(BT_SLEEP);
498
499 return count;
500 }
501
502 #ifdef CONFIG_OF
bluetooth_platdata_parse_dt(struct device * dev,struct rfkill_rk_platform_data * data)503 static int bluetooth_platdata_parse_dt(struct device *dev,
504 struct rfkill_rk_platform_data *data)
505 {
506 struct device_node *node = dev->of_node;
507 int gpio;
508 enum of_gpio_flags flags;
509
510 if (!node)
511 return -ENODEV;
512
513 memset(data, 0, sizeof(*data));
514
515 if (of_find_property(node, "wifi-bt-power-toggle", NULL)) {
516 data->power_toggle = true;
517 LOG("%s: get property wifi-bt-power-toggle.\n", __func__);
518 } else {
519 data->power_toggle = false;
520 }
521
522 gpio = of_get_named_gpio_flags(node, "uart_rts_gpios", 0, &flags);
523 if (gpio_is_valid(gpio)) {
524 data->rts_gpio.io = gpio;
525 data->rts_gpio.enable = (flags == GPIO_ACTIVE_HIGH) ? 1 : 0;
526 LOG("%s: get property: uart_rts_gpios = %d.\n", __func__, gpio);
527 data->pinctrl = devm_pinctrl_get(dev);
528 if (!IS_ERR(data->pinctrl)) {
529 data->rts_gpio.default_state =
530 pinctrl_lookup_state(data->pinctrl, "default");
531 data->rts_gpio.gpio_state =
532 pinctrl_lookup_state(data->pinctrl, "rts_gpio");
533 } else {
534 data->pinctrl = NULL;
535 LOG("%s: dts does't define the uart rts iomux.\n",
536 __func__);
537 return -EINVAL;
538 }
539 } else {
540 data->pinctrl = NULL;
541 data->rts_gpio.io = -EINVAL;
542 LOG("%s: uart_rts_gpios is no-in-use.\n", __func__);
543 }
544
545 gpio = of_get_named_gpio_flags(node, "BT,power_gpio", 0, &flags);
546 if (gpio_is_valid(gpio)) {
547 data->poweron_gpio.io = gpio;
548 data->poweron_gpio.enable = (flags == GPIO_ACTIVE_HIGH) ? 1 : 0;
549 LOG("%s: get property: BT,power_gpio = %d.\n", __func__, gpio);
550 } else {
551 data->poweron_gpio.io = -1;
552 }
553 gpio = of_get_named_gpio_flags(node, "BT,reset_gpio", 0, &flags);
554 if (gpio_is_valid(gpio)) {
555 data->reset_gpio.io = gpio;
556 data->reset_gpio.enable = (flags == GPIO_ACTIVE_HIGH) ? 1 : 0;
557 LOG("%s: get property: BT,reset_gpio = %d.\n", __func__, gpio);
558 } else {
559 data->reset_gpio.io = -1;
560 }
561 gpio = of_get_named_gpio_flags(node, "BT,wake_gpio", 0, &flags);
562 if (gpio_is_valid(gpio)) {
563 data->wake_gpio.io = gpio;
564 data->wake_gpio.enable = (flags == GPIO_ACTIVE_HIGH) ? 1 : 0;
565 LOG("%s: get property: BT,wake_gpio = %d.\n", __func__, gpio);
566 } else {
567 data->wake_gpio.io = -1;
568 }
569 gpio = of_get_named_gpio_flags(node, "BT,wake_host_irq", 0, &flags);
570 if (gpio_is_valid(gpio)) {
571 data->wake_host_irq.gpio.io = gpio;
572 data->wake_host_irq.gpio.enable = flags;
573 LOG("%s: get property: BT,wake_host_irq = %d.\n", __func__,
574 gpio);
575 } else {
576 data->wake_host_irq.gpio.io = -1;
577 }
578
579 data->ext_clk = devm_clk_get(dev, "ext_clock");
580 if (IS_ERR(data->ext_clk)) {
581 LOG("%s: clk_get failed!!!.\n", __func__);
582 } else {
583 clk_prepare_enable(data->ext_clk);
584 }
585 return 0;
586 }
587 #endif //CONFIG_OF
588
589 static const struct file_operations bluesleep_lpm = {
590 .owner = THIS_MODULE,
591 .read = bluesleep_read_proc_lpm,
592 .write = bluesleep_write_proc_lpm,
593 };
594
595 static const struct file_operations bluesleep_btwrite = {
596 .owner = THIS_MODULE,
597 .read = bluesleep_read_proc_btwrite,
598 .write = bluesleep_write_proc_btwrite,
599 };
600
rfkill_rk_probe(struct platform_device * pdev)601 static int rfkill_rk_probe(struct platform_device *pdev)
602 {
603 struct rfkill_rk_data *rfkill;
604 struct rfkill_rk_platform_data *pdata = pdev->dev.platform_data;
605 int ret = 0;
606 struct proc_dir_entry *ent;
607
608 DBG("Enter %s\n", __func__);
609
610 if (!pdata) {
611 #ifdef CONFIG_OF
612 pdata = devm_kzalloc(&pdev->dev,
613 sizeof(struct rfkill_rk_platform_data),
614 GFP_KERNEL);
615 if (!pdata)
616 return -ENOMEM;
617
618 ret = bluetooth_platdata_parse_dt(&pdev->dev, pdata);
619 if (ret < 0) {
620 #endif
621 LOG("%s: No platform data specified\n", __func__);
622 return ret;
623 #ifdef CONFIG_OF
624 }
625 #endif
626 }
627
628 pdata->name = (char *)bt_name;
629 pdata->type = RFKILL_TYPE_BLUETOOTH;
630
631 rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
632 if (!rfkill)
633 return -ENOMEM;
634
635 rfkill->pdata = pdata;
636 rfkill->pdev = pdev;
637 g_rfkill = rfkill;
638
639 bluetooth_dir = proc_mkdir("bluetooth", NULL);
640 if (!bluetooth_dir) {
641 LOG("Unable to create /proc/bluetooth directory");
642 return -ENOMEM;
643 }
644
645 sleep_dir = proc_mkdir("sleep", bluetooth_dir);
646 if (!sleep_dir) {
647 LOG("Unable to create /proc/%s directory", PROC_DIR);
648 return -ENOMEM;
649 }
650
651 /* read/write proc entries */
652 ent = proc_create("lpm", 0, sleep_dir, (struct proc_ops*)&bluesleep_lpm);
653 if (!ent) {
654 LOG("Unable to create /proc/%s/lpm entry", PROC_DIR);
655 ret = -ENOMEM;
656 goto fail_alloc;
657 }
658
659 /* read/write proc entries */
660 ent = proc_create("btwrite", 0, sleep_dir, (struct proc_ops*)&bluesleep_btwrite);
661 if (!ent) {
662 LOG("Unable to create /proc/%s/btwrite entry", PROC_DIR);
663 ret = -ENOMEM;
664 goto fail_alloc;
665 }
666
667 DBG("init gpio\n");
668
669 ret = rfkill_rk_setup_gpio(pdev, &pdata->poweron_gpio, pdata->name,
670 "poweron");
671 if (ret)
672 goto fail_gpio;
673
674 ret = rfkill_rk_setup_gpio(pdev, &pdata->reset_gpio, pdata->name,
675 "reset");
676 if (ret)
677 goto fail_gpio;
678
679 ret = rfkill_rk_setup_gpio(pdev, &pdata->wake_gpio, pdata->name,
680 "wake");
681 if (ret)
682 goto fail_gpio;
683
684 ret = rfkill_rk_setup_gpio(pdev, &pdata->rts_gpio, rfkill->pdata->name,
685 "rts");
686 if (ret)
687 goto fail_gpio;
688
689 wake_lock_init(&rfkill->bt_irq_wl, WAKE_LOCK_SUSPEND,
690 "rfkill_rk_irq_wl");
691
692 ret = rfkill_rk_setup_wake_irq(rfkill, 0);
693 if (ret)
694 goto fail_setup_wake_irq;
695
696 DBG("setup rfkill\n");
697 rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type,
698 &rfkill_rk_ops, rfkill);
699 if (!rfkill->rfkill_dev)
700 goto fail_alloc;
701
702 rfkill_set_states(rfkill->rfkill_dev, BT_BLOCKED, false);
703 ret = rfkill_register(rfkill->rfkill_dev);
704 if (ret < 0)
705 goto fail_rfkill;
706
707 INIT_DELAYED_WORK(&rfkill->bt_sleep_delay_work,
708 rfkill_rk_delay_sleep_bt);
709
710 //rfkill_rk_set_power(rfkill, BT_BLOCKED);
711 // bt turn off power
712 if (gpio_is_valid(pdata->poweron_gpio.io)) {
713 gpio_direction_output(pdata->poweron_gpio.io,
714 !pdata->poweron_gpio.enable);
715 }
716 if (gpio_is_valid(pdata->reset_gpio.io)) {
717 gpio_direction_output(pdata->reset_gpio.io,
718 !pdata->reset_gpio.enable);
719 }
720
721 platform_set_drvdata(pdev, rfkill);
722
723 LOG("%s device registered.\n", pdata->name);
724
725 return 0;
726
727 fail_rfkill:
728 rfkill_destroy(rfkill->rfkill_dev);
729 fail_alloc:
730
731 remove_proc_entry("btwrite", sleep_dir);
732 remove_proc_entry("lpm", sleep_dir);
733 fail_setup_wake_irq:
734 wake_lock_destroy(&rfkill->bt_irq_wl);
735 fail_gpio:
736
737 g_rfkill = NULL;
738 return ret;
739 }
740
rfkill_rk_remove(struct platform_device * pdev)741 static int rfkill_rk_remove(struct platform_device *pdev)
742 {
743 struct rfkill_rk_data *rfkill = platform_get_drvdata(pdev);
744
745 LOG("Enter %s\n", __func__);
746
747 rfkill_unregister(rfkill->rfkill_dev);
748 rfkill_destroy(rfkill->rfkill_dev);
749
750 cancel_delayed_work_sync(&rfkill->bt_sleep_delay_work);
751
752 // free gpio
753 if (gpio_is_valid(rfkill->pdata->rts_gpio.io))
754 gpio_free(rfkill->pdata->rts_gpio.io);
755
756 if (gpio_is_valid(rfkill->pdata->wake_host_irq.gpio.io)) {
757 free_irq(rfkill->pdata->wake_host_irq.irq, rfkill);
758 #ifndef CONFIG_BK3515A_COMBO
759 gpio_free(rfkill->pdata->wake_host_irq.gpio.io);
760 #endif
761 }
762
763 #ifndef CONFIG_BK3515A_COMBO
764 if (gpio_is_valid(rfkill->pdata->wake_gpio.io))
765 gpio_free(rfkill->pdata->wake_gpio.io);
766 #endif
767
768 if (gpio_is_valid(rfkill->pdata->reset_gpio.io))
769 gpio_free(rfkill->pdata->reset_gpio.io);
770
771 if (gpio_is_valid(rfkill->pdata->poweron_gpio.io))
772 gpio_free(rfkill->pdata->poweron_gpio.io);
773 clk_disable_unprepare(rfkill->pdata->ext_clk);
774 wake_lock_destroy(&rfkill->bt_irq_wl);
775 g_rfkill = NULL;
776
777 return 0;
778 }
779
780 static const struct dev_pm_ops rfkill_rk_pm_ops = {
781 .prepare = rfkill_rk_pm_prepare,
782 .complete = rfkill_rk_pm_complete,
783 };
784
785 #ifdef CONFIG_OF
786 static struct of_device_id bt_platdata_of_match[] = {
787 { .compatible = "bluetooth-platdata" },
788 {}
789 };
790 MODULE_DEVICE_TABLE(of, bt_platdata_of_match);
791 #endif //CONFIG_OF
792
793 static struct platform_driver rfkill_rk_driver = {
794 .probe = rfkill_rk_probe,
795 .remove = rfkill_rk_remove,
796 .driver = {
797 .name = "rfkill_bt",
798 .owner = THIS_MODULE,
799 .pm = &rfkill_rk_pm_ops,
800 .of_match_table = of_match_ptr(bt_platdata_of_match),
801 },
802 };
803
rfkill_rk_init(void)804 static int __init rfkill_rk_init(void)
805 {
806 int err;
807
808 LOG("Enter %s\n", __func__);
809 err = rfkill_wlan_init();
810 if (err)
811 return err;
812 return platform_driver_register(&rfkill_rk_driver);
813 }
814
rfkill_rk_exit(void)815 static void __exit rfkill_rk_exit(void)
816 {
817 LOG("Enter %s\n", __func__);
818 platform_driver_unregister(&rfkill_rk_driver);
819 rfkill_wlan_exit();
820 }
821
822 module_init(rfkill_rk_init);
823 module_exit(rfkill_rk_exit);
824
825 MODULE_DESCRIPTION("rock-chips rfkill for Bluetooth v0.3");
826 MODULE_AUTHOR("cmy@rock-chips.com, gwl@rock-chips.com");
827 MODULE_LICENSE("GPL");
828