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r8152: fix tx packets accounting
[linux/fpc-iii.git] / drivers / bluetooth / hci_bcm.c
blobdeed580135552491a1ace7314d98a07ce04a1297
1 /*
2 *
3 * Bluetooth HCI UART driver for Broadcom devices
4 *
5 * Copyright (C) 2015 Intel Corporation
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/errno.h>
26 #include <linux/skbuff.h>
27 #include <linux/firmware.h>
28 #include <linux/module.h>
29 #include <linux/acpi.h>
30 #include <linux/platform_device.h>
31 #include <linux/clk.h>
32 #include <linux/gpio/consumer.h>
33 #include <linux/tty.h>
34 #include <linux/interrupt.h>
35 #include <linux/dmi.h>
36 #include <linux/pm_runtime.h>
37
38 #include <net/bluetooth/bluetooth.h>
39 #include <net/bluetooth/hci_core.h>
40
41 #include "btbcm.h"
42 #include "hci_uart.h"
43
44 #define BCM_LM_DIAG_PKT 0x07
45 #define BCM_LM_DIAG_SIZE 63
46
47 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
48
49 struct bcm_device {
50 struct list_head list;
51
52 struct platform_device *pdev;
53
54 const char *name;
55 struct gpio_desc *device_wakeup;
56 struct gpio_desc *shutdown;
57
58 struct clk *clk;
59 bool clk_enabled;
60
61 u32 init_speed;
62 int irq;
63 u8 irq_polarity;
64
65 #ifdef CONFIG_PM
66 struct hci_uart *hu;
67 bool is_suspended; /* suspend/resume flag */
68 #endif
69 };
70
71 struct bcm_data {
72 struct sk_buff *rx_skb;
73 struct sk_buff_head txq;
74
75 struct bcm_device *dev;
76 };
77
78 /* List of BCM BT UART devices */
79 static DEFINE_MUTEX(bcm_device_lock);
80 static LIST_HEAD(bcm_device_list);
81
82 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
83 {
84 struct hci_dev *hdev = hu->hdev;
85 struct sk_buff *skb;
86 struct bcm_update_uart_baud_rate param;
87
88 if (speed > 3000000) {
89 struct bcm_write_uart_clock_setting clock;
90
91 clock.type = BCM_UART_CLOCK_48MHZ;
92
93 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
94
95 /* This Broadcom specific command changes the UART's controller
96 * clock for baud rate > 3000000.
97 */
98 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
99 if (IS_ERR(skb)) {
100 int err = PTR_ERR(skb);
101 bt_dev_err(hdev, "BCM: failed to write clock (%d)",
102 err);
103 return err;
104 }
105
106 kfree_skb(skb);
107 }
108
109 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
110
111 param.zero = cpu_to_le16(0);
112 param.baud_rate = cpu_to_le32(speed);
113
114 /* This Broadcom specific command changes the UART's controller baud
115 * rate.
116 */
117 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), &param,
118 HCI_INIT_TIMEOUT);
119 if (IS_ERR(skb)) {
120 int err = PTR_ERR(skb);
121 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
122 err);
123 return err;
124 }
125
126 kfree_skb(skb);
127
128 return 0;
129 }
130
131 /* bcm_device_exists should be protected by bcm_device_lock */
132 static bool bcm_device_exists(struct bcm_device *device)
133 {
134 struct list_head *p;
135
136 list_for_each(p, &bcm_device_list) {
137 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
138
139 if (device == dev)
140 return true;
141 }
142
143 return false;
144 }
145
146 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
147 {
148 if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
149 clk_enable(dev->clk);
150
151 gpiod_set_value(dev->shutdown, powered);
152 gpiod_set_value(dev->device_wakeup, powered);
153
154 if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
155 clk_disable(dev->clk);
156
157 dev->clk_enabled = powered;
158
159 return 0;
160 }
161
162 #ifdef CONFIG_PM
163 static irqreturn_t bcm_host_wake(int irq, void *data)
164 {
165 struct bcm_device *bdev = data;
166
167 bt_dev_dbg(bdev, "Host wake IRQ");
168
169 pm_runtime_get(&bdev->pdev->dev);
170 pm_runtime_mark_last_busy(&bdev->pdev->dev);
171 pm_runtime_put_autosuspend(&bdev->pdev->dev);
172
173 return IRQ_HANDLED;
174 }
175
176 static int bcm_request_irq(struct bcm_data *bcm)
177 {
178 struct bcm_device *bdev = bcm->dev;
179 int err = 0;
180
181 /* If this is not a platform device, do not enable PM functionalities */
182 mutex_lock(&bcm_device_lock);
183 if (!bcm_device_exists(bdev)) {
184 err = -ENODEV;
185 goto unlock;
186 }
187
188 if (bdev->irq > 0) {
189 err = devm_request_irq(&bdev->pdev->dev, bdev->irq,
190 bcm_host_wake, IRQF_TRIGGER_RISING,
191 "host_wake", bdev);
192 if (err)
193 goto unlock;
194
195 device_init_wakeup(&bdev->pdev->dev, true);
196
197 pm_runtime_set_autosuspend_delay(&bdev->pdev->dev,
198 BCM_AUTOSUSPEND_DELAY);
199 pm_runtime_use_autosuspend(&bdev->pdev->dev);
200 pm_runtime_set_active(&bdev->pdev->dev);
201 pm_runtime_enable(&bdev->pdev->dev);
202 }
203
204 unlock:
205 mutex_unlock(&bcm_device_lock);
206
207 return err;
208 }
209
210 static const struct bcm_set_sleep_mode default_sleep_params = {
211 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
212 .idle_host = 2, /* idle threshold HOST, in 300ms */
213 .idle_dev = 2, /* idle threshold device, in 300ms */
214 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
215 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
216 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
217 .combine_modes = 1, /* Combine sleep and LPM flag */
218 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
219 /* Irrelevant USB flags */
220 .usb_auto_sleep = 0,
221 .usb_resume_timeout = 0,
222 .pulsed_host_wake = 0,
223 .break_to_host = 0
224 };
225
226 static int bcm_setup_sleep(struct hci_uart *hu)
227 {
228 struct bcm_data *bcm = hu->priv;
229 struct sk_buff *skb;
230 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
231
232 sleep_params.host_wake_active = !bcm->dev->irq_polarity;
233
234 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
235 &sleep_params, HCI_INIT_TIMEOUT);
236 if (IS_ERR(skb)) {
237 int err = PTR_ERR(skb);
238 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
239 return err;
240 }
241 kfree_skb(skb);
242
243 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
244
245 return 0;
246 }
247 #else
248 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
249 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
250 #endif
251
252 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
253 {
254 struct hci_uart *hu = hci_get_drvdata(hdev);
255 struct bcm_data *bcm = hu->priv;
256 struct sk_buff *skb;
257
258 if (!test_bit(HCI_RUNNING, &hdev->flags))
259 return -ENETDOWN;
260
261 skb = bt_skb_alloc(3, GFP_KERNEL);
262 if (!skb)
263 return -ENOMEM;
264
265 *skb_put(skb, 1) = BCM_LM_DIAG_PKT;
266 *skb_put(skb, 1) = 0xf0;
267 *skb_put(skb, 1) = enable;
268
269 skb_queue_tail(&bcm->txq, skb);
270 hci_uart_tx_wakeup(hu);
271
272 return 0;
273 }
274
275 static int bcm_open(struct hci_uart *hu)
276 {
277 struct bcm_data *bcm;
278 struct list_head *p;
279
280 bt_dev_dbg(hu->hdev, "hu %p", hu);
281
282 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
283 if (!bcm)
284 return -ENOMEM;
285
286 skb_queue_head_init(&bcm->txq);
287
288 hu->priv = bcm;
289
290 if (!hu->tty->dev)
291 goto out;
292
293 mutex_lock(&bcm_device_lock);
294 list_for_each(p, &bcm_device_list) {
295 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
296
297 /* Retrieve saved bcm_device based on parent of the
298 * platform device (saved during device probe) and
299 * parent of tty device used by hci_uart
300 */
301 if (hu->tty->dev->parent == dev->pdev->dev.parent) {
302 bcm->dev = dev;
303 hu->init_speed = dev->init_speed;
304 #ifdef CONFIG_PM
305 dev->hu = hu;
306 #endif
307 bcm_gpio_set_power(bcm->dev, true);
308 break;
309 }
310 }
311
312 mutex_unlock(&bcm_device_lock);
313 out:
314 return 0;
315 }
316
317 static int bcm_close(struct hci_uart *hu)
318 {
319 struct bcm_data *bcm = hu->priv;
320 struct bcm_device *bdev = bcm->dev;
321
322 bt_dev_dbg(hu->hdev, "hu %p", hu);
323
324 /* Protect bcm->dev against removal of the device or driver */
325 mutex_lock(&bcm_device_lock);
326 if (bcm_device_exists(bdev)) {
327 bcm_gpio_set_power(bdev, false);
328 #ifdef CONFIG_PM
329 pm_runtime_disable(&bdev->pdev->dev);
330 pm_runtime_set_suspended(&bdev->pdev->dev);
331
332 if (device_can_wakeup(&bdev->pdev->dev)) {
333 devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
334 device_init_wakeup(&bdev->pdev->dev, false);
335 }
336
337 bdev->hu = NULL;
338 #endif
339 }
340 mutex_unlock(&bcm_device_lock);
341
342 skb_queue_purge(&bcm->txq);
343 kfree_skb(bcm->rx_skb);
344 kfree(bcm);
345
346 hu->priv = NULL;
347 return 0;
348 }
349
350 static int bcm_flush(struct hci_uart *hu)
351 {
352 struct bcm_data *bcm = hu->priv;
353
354 bt_dev_dbg(hu->hdev, "hu %p", hu);
355
356 skb_queue_purge(&bcm->txq);
357
358 return 0;
359 }
360
361 static int bcm_setup(struct hci_uart *hu)
362 {
363 struct bcm_data *bcm = hu->priv;
364 char fw_name[64];
365 const struct firmware *fw;
366 unsigned int speed;
367 int err;
368
369 bt_dev_dbg(hu->hdev, "hu %p", hu);
370
371 hu->hdev->set_diag = bcm_set_diag;
372 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
373
374 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
375 if (err)
376 return err;
377
378 err = request_firmware(&fw, fw_name, &hu->hdev->dev);
379 if (err < 0) {
380 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
381 return 0;
382 }
383
384 err = btbcm_patchram(hu->hdev, fw);
385 if (err) {
386 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
387 goto finalize;
388 }
389
390 /* Init speed if any */
391 if (hu->init_speed)
392 speed = hu->init_speed;
393 else if (hu->proto->init_speed)
394 speed = hu->proto->init_speed;
395 else
396 speed = 0;
397
398 if (speed)
399 hci_uart_set_baudrate(hu, speed);
400
401 /* Operational speed if any */
402 if (hu->oper_speed)
403 speed = hu->oper_speed;
404 else if (hu->proto->oper_speed)
405 speed = hu->proto->oper_speed;
406 else
407 speed = 0;
408
409 if (speed) {
410 err = bcm_set_baudrate(hu, speed);
411 if (!err)
412 hci_uart_set_baudrate(hu, speed);
413 }
414
415 finalize:
416 release_firmware(fw);
417
418 err = btbcm_finalize(hu->hdev);
419 if (err)
420 return err;
421
422 err = bcm_request_irq(bcm);
423 if (!err)
424 err = bcm_setup_sleep(hu);
425
426 return err;
427 }
428
429 #define BCM_RECV_LM_DIAG \
430 .type = BCM_LM_DIAG_PKT, \
431 .hlen = BCM_LM_DIAG_SIZE, \
432 .loff = 0, \
433 .lsize = 0, \
434 .maxlen = BCM_LM_DIAG_SIZE
435
436 static const struct h4_recv_pkt bcm_recv_pkts[] = {
437 { H4_RECV_ACL, .recv = hci_recv_frame },
438 { H4_RECV_SCO, .recv = hci_recv_frame },
439 { H4_RECV_EVENT, .recv = hci_recv_frame },
440 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
441 };
442
443 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
444 {
445 struct bcm_data *bcm = hu->priv;
446
447 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
448 return -EUNATCH;
449
450 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
451 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
452 if (IS_ERR(bcm->rx_skb)) {
453 int err = PTR_ERR(bcm->rx_skb);
454 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
455 bcm->rx_skb = NULL;
456 return err;
457 } else if (!bcm->rx_skb) {
458 /* Delay auto-suspend when receiving completed packet */
459 mutex_lock(&bcm_device_lock);
460 if (bcm->dev && bcm_device_exists(bcm->dev)) {
461 pm_runtime_get(&bcm->dev->pdev->dev);
462 pm_runtime_mark_last_busy(&bcm->dev->pdev->dev);
463 pm_runtime_put_autosuspend(&bcm->dev->pdev->dev);
464 }
465 mutex_unlock(&bcm_device_lock);
466 }
467
468 return count;
469 }
470
471 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
472 {
473 struct bcm_data *bcm = hu->priv;
474
475 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
476
477 /* Prepend skb with frame type */
478 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
479 skb_queue_tail(&bcm->txq, skb);
480
481 return 0;
482 }
483
484 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
485 {
486 struct bcm_data *bcm = hu->priv;
487 struct sk_buff *skb = NULL;
488 struct bcm_device *bdev = NULL;
489
490 mutex_lock(&bcm_device_lock);
491
492 if (bcm_device_exists(bcm->dev)) {
493 bdev = bcm->dev;
494 pm_runtime_get_sync(&bdev->pdev->dev);
495 /* Shall be resumed here */
496 }
497
498 skb = skb_dequeue(&bcm->txq);
499
500 if (bdev) {
501 pm_runtime_mark_last_busy(&bdev->pdev->dev);
502 pm_runtime_put_autosuspend(&bdev->pdev->dev);
503 }
504
505 mutex_unlock(&bcm_device_lock);
506
507 return skb;
508 }
509
510 #ifdef CONFIG_PM
511 static int bcm_suspend_device(struct device *dev)
512 {
513 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
514
515 bt_dev_dbg(bdev, "");
516
517 if (!bdev->is_suspended && bdev->hu) {
518 hci_uart_set_flow_control(bdev->hu, true);
519
520 /* Once this returns, driver suspends BT via GPIO */
521 bdev->is_suspended = true;
522 }
523
524 /* Suspend the device */
525 if (bdev->device_wakeup) {
526 gpiod_set_value(bdev->device_wakeup, false);
527 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
528 mdelay(15);
529 }
530
531 return 0;
532 }
533
534 static int bcm_resume_device(struct device *dev)
535 {
536 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
537
538 bt_dev_dbg(bdev, "");
539
540 if (bdev->device_wakeup) {
541 gpiod_set_value(bdev->device_wakeup, true);
542 bt_dev_dbg(bdev, "resume, delaying 15 ms");
543 mdelay(15);
544 }
545
546 /* When this executes, the device has woken up already */
547 if (bdev->is_suspended && bdev->hu) {
548 bdev->is_suspended = false;
549
550 hci_uart_set_flow_control(bdev->hu, false);
551 }
552
553 return 0;
554 }
555 #endif
556
557 #ifdef CONFIG_PM_SLEEP
558 /* Platform suspend callback */
559 static int bcm_suspend(struct device *dev)
560 {
561 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
562 int error;
563
564 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
565
566 /* bcm_suspend can be called at any time as long as platform device is
567 * bound, so it should use bcm_device_lock to protect access to hci_uart
568 * and device_wake-up GPIO.
569 */
570 mutex_lock(&bcm_device_lock);
571
572 if (!bdev->hu)
573 goto unlock;
574
575 if (pm_runtime_active(dev))
576 bcm_suspend_device(dev);
577
578 if (device_may_wakeup(&bdev->pdev->dev)) {
579 error = enable_irq_wake(bdev->irq);
580 if (!error)
581 bt_dev_dbg(bdev, "BCM irq: enabled");
582 }
583
584 unlock:
585 mutex_unlock(&bcm_device_lock);
586
587 return 0;
588 }
589
590 /* Platform resume callback */
591 static int bcm_resume(struct device *dev)
592 {
593 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
594
595 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
596
597 /* bcm_resume can be called at any time as long as platform device is
598 * bound, so it should use bcm_device_lock to protect access to hci_uart
599 * and device_wake-up GPIO.
600 */
601 mutex_lock(&bcm_device_lock);
602
603 if (!bdev->hu)
604 goto unlock;
605
606 if (device_may_wakeup(&bdev->pdev->dev)) {
607 disable_irq_wake(bdev->irq);
608 bt_dev_dbg(bdev, "BCM irq: disabled");
609 }
610
611 bcm_resume_device(dev);
612
613 unlock:
614 mutex_unlock(&bcm_device_lock);
615
616 pm_runtime_disable(dev);
617 pm_runtime_set_active(dev);
618 pm_runtime_enable(dev);
619
620 return 0;
621 }
622 #endif
623
624 static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false };
625 static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
626 static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };
627
628 static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
629 { "device-wakeup-gpios", &device_wakeup_gpios, 1 },
630 { "shutdown-gpios", &shutdown_gpios, 1 },
631 { "host-wakeup-gpios", &host_wakeup_gpios, 1 },
632 { },
633 };
634
635 #ifdef CONFIG_ACPI
636 static u8 acpi_active_low = ACPI_ACTIVE_LOW;
637
638 /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
639 static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = {
640 {
641 .ident = "Asus T100TA",
642 .matches = {
643 DMI_EXACT_MATCH(DMI_SYS_VENDOR,
644 "ASUSTeK COMPUTER INC."),
645 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
646 },
647 .driver_data = &acpi_active_low,
648 },
649 { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */
650 .ident = "Lenovo ThinkPad 8",
651 .matches = {
652 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
653 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"),
654 },
655 .driver_data = &acpi_active_low,
656 },
657 { }
658 };
659
660 static int bcm_resource(struct acpi_resource *ares, void *data)
661 {
662 struct bcm_device *dev = data;
663 struct acpi_resource_extended_irq *irq;
664 struct acpi_resource_gpio *gpio;
665 struct acpi_resource_uart_serialbus *sb;
666
667 switch (ares->type) {
668 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
669 irq = &ares->data.extended_irq;
670 dev->irq_polarity = irq->polarity;
671 break;
672
673 case ACPI_RESOURCE_TYPE_GPIO:
674 gpio = &ares->data.gpio;
675 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
676 dev->irq_polarity = gpio->polarity;
677 break;
678
679 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
680 sb = &ares->data.uart_serial_bus;
681 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
682 dev->init_speed = sb->default_baud_rate;
683 break;
684
685 default:
686 break;
687 }
688
689 /* Always tell the ACPI core to skip this resource */
690 return 1;
691 }
692
693 static int bcm_acpi_probe(struct bcm_device *dev)
694 {
695 struct platform_device *pdev = dev->pdev;
696 LIST_HEAD(resources);
697 const struct dmi_system_id *dmi_id;
698 int ret;
699
700 /* Retrieve GPIO data */
701 dev->name = dev_name(&pdev->dev);
702 ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
703 acpi_bcm_default_gpios);
704 if (ret)
705 return ret;
706
707 dev->clk = devm_clk_get(&pdev->dev, NULL);
708
709 dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
710 "device-wakeup",
711 GPIOD_OUT_LOW);
712 if (IS_ERR(dev->device_wakeup))
713 return PTR_ERR(dev->device_wakeup);
714
715 dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown",
716 GPIOD_OUT_LOW);
717 if (IS_ERR(dev->shutdown))
718 return PTR_ERR(dev->shutdown);
719
720 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
721 dev->irq = platform_get_irq(pdev, 0);
722 if (dev->irq <= 0) {
723 struct gpio_desc *gpio;
724
725 gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
726 GPIOD_IN);
727 if (IS_ERR(gpio))
728 return PTR_ERR(gpio);
729
730 dev->irq = gpiod_to_irq(gpio);
731 }
732
733 dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);
734
735 /* Make sure at-least one of the GPIO is defined and that
736 * a name is specified for this instance
737 */
738 if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) {
739 dev_err(&pdev->dev, "invalid platform data\n");
740 return -EINVAL;
741 }
742
743 /* Retrieve UART ACPI info */
744 ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev),
745 &resources, bcm_resource, dev);
746 if (ret < 0)
747 return ret;
748 acpi_dev_free_resource_list(&resources);
749
750 dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table);
751 if (dmi_id) {
752 bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
753 dmi_id->ident);
754 dev->irq_polarity = *(u8 *)dmi_id->driver_data;
755 }
756
757 return 0;
758 }
759 #else
760 static int bcm_acpi_probe(struct bcm_device *dev)
761 {
762 return -EINVAL;
763 }
764 #endif /* CONFIG_ACPI */
765
766 static int bcm_probe(struct platform_device *pdev)
767 {
768 struct bcm_device *dev;
769 int ret;
770
771 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
772 if (!dev)
773 return -ENOMEM;
774
775 dev->pdev = pdev;
776
777 ret = bcm_acpi_probe(dev);
778 if (ret)
779 return ret;
780
781 platform_set_drvdata(pdev, dev);
782
783 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
784
785 /* Place this instance on the device list */
786 mutex_lock(&bcm_device_lock);
787 list_add_tail(&dev->list, &bcm_device_list);
788 mutex_unlock(&bcm_device_lock);
789
790 bcm_gpio_set_power(dev, false);
791
792 return 0;
793 }
794
795 static int bcm_remove(struct platform_device *pdev)
796 {
797 struct bcm_device *dev = platform_get_drvdata(pdev);
798
799 mutex_lock(&bcm_device_lock);
800 list_del(&dev->list);
801 mutex_unlock(&bcm_device_lock);
802
803 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));
804
805 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
806
807 return 0;
808 }
809
810 static const struct hci_uart_proto bcm_proto = {
811 .id = HCI_UART_BCM,
812 .name = "Broadcom",
813 .manufacturer = 15,
814 .init_speed = 115200,
815 .oper_speed = 4000000,
816 .open = bcm_open,
817 .close = bcm_close,
818 .flush = bcm_flush,
819 .setup = bcm_setup,
820 .set_baudrate = bcm_set_baudrate,
821 .recv = bcm_recv,
822 .enqueue = bcm_enqueue,
823 .dequeue = bcm_dequeue,
824 };
825
826 #ifdef CONFIG_ACPI
827 static const struct acpi_device_id bcm_acpi_match[] = {
828 { "BCM2E1A", 0 },
829 { "BCM2E39", 0 },
830 { "BCM2E3A", 0 },
831 { "BCM2E3D", 0 },
832 { "BCM2E3F", 0 },
833 { "BCM2E40", 0 },
834 { "BCM2E54", 0 },
835 { "BCM2E55", 0 },
836 { "BCM2E64", 0 },
837 { "BCM2E65", 0 },
838 { "BCM2E67", 0 },
839 { "BCM2E71", 0 },
840 { "BCM2E7B", 0 },
841 { "BCM2E7C", 0 },
842 { },
843 };
844 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
845 #endif
846
847 /* Platform suspend and resume callbacks */
848 static const struct dev_pm_ops bcm_pm_ops = {
849 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
850 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
851 };
852
853 static struct platform_driver bcm_driver = {
854 .probe = bcm_probe,
855 .remove = bcm_remove,
856 .driver = {
857 .name = "hci_bcm",
858 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
859 .pm = &bcm_pm_ops,
860 },
861 };
862
863 int __init bcm_init(void)
864 {
865 platform_driver_register(&bcm_driver);
866
867 return hci_uart_register_proto(&bcm_proto);
868 }
869
870 int __exit bcm_deinit(void)
871 {
872 platform_driver_unregister(&bcm_driver);
873
874 return hci_uart_unregister_proto(&bcm_proto);
875 }
Linux with added FPC-III support