3 * Bluetooth HCI UART driver for Broadcom devices
5 * Copyright (C) 2015 Intel Corporation
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.
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.
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
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>
31 #include <linux/property.h>
32 #include <linux/platform_device.h>
33 #include <linux/clk.h>
34 #include <linux/gpio/consumer.h>
35 #include <linux/tty.h>
36 #include <linux/interrupt.h>
37 #include <linux/dmi.h>
38 #include <linux/pm_runtime.h>
39 #include <linux/serdev.h>
41 #include <net/bluetooth/bluetooth.h>
42 #include <net/bluetooth/hci_core.h>
47 #define BCM_NULL_PKT 0x00
48 #define BCM_NULL_SIZE 0
50 #define BCM_LM_DIAG_PKT 0x07
51 #define BCM_LM_DIAG_SIZE 63
53 #define BCM_TYPE49_PKT 0x31
54 #define BCM_TYPE49_SIZE 0
56 #define BCM_TYPE52_PKT 0x34
57 #define BCM_TYPE52_SIZE 0
59 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
61 /* platform device driver resources */
63 struct list_head list;
65 struct platform_device *pdev;
68 struct gpio_desc *device_wakeup;
69 struct gpio_desc *shutdown;
81 bool is_suspended; /* suspend/resume flag */
85 /* serdev driver resources */
90 /* generic bcm uart resources */
92 struct sk_buff *rx_skb;
93 struct sk_buff_head txq;
95 struct bcm_device *dev;
98 /* List of BCM BT UART devices */
99 static DEFINE_MUTEX(bcm_device_lock);
100 static LIST_HEAD(bcm_device_list);
102 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
105 serdev_device_set_baudrate(hu->serdev, speed);
107 hci_uart_set_baudrate(hu, speed);
110 static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
112 struct hci_dev *hdev = hu->hdev;
114 struct bcm_update_uart_baud_rate param;
116 if (speed > 3000000) {
117 struct bcm_write_uart_clock_setting clock;
119 clock.type = BCM_UART_CLOCK_48MHZ;
121 bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
123 /* This Broadcom specific command changes the UART's controller
124 * clock for baud rate > 3000000.
126 skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
128 int err = PTR_ERR(skb);
129 bt_dev_err(hdev, "BCM: failed to write clock (%d)",
137 bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
139 param.zero = cpu_to_le16(0);
140 param.baud_rate = cpu_to_le32(speed);
142 /* This Broadcom specific command changes the UART's controller baud
145 skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m,
148 int err = PTR_ERR(skb);
149 bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
159 /* bcm_device_exists should be protected by bcm_device_lock */
160 static bool bcm_device_exists(struct bcm_device *device)
164 list_for_each(p, &bcm_device_list) {
165 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
174 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
176 if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
177 clk_prepare_enable(dev->clk);
179 gpiod_set_value(dev->shutdown, powered);
180 gpiod_set_value(dev->device_wakeup, powered);
182 if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
183 clk_disable_unprepare(dev->clk);
185 dev->clk_enabled = powered;
191 static irqreturn_t bcm_host_wake(int irq, void *data)
193 struct bcm_device *bdev = data;
195 bt_dev_dbg(bdev, "Host wake IRQ");
197 pm_runtime_get(&bdev->pdev->dev);
198 pm_runtime_mark_last_busy(&bdev->pdev->dev);
199 pm_runtime_put_autosuspend(&bdev->pdev->dev);
204 static int bcm_request_irq(struct bcm_data *bcm)
206 struct bcm_device *bdev = bcm->dev;
209 /* If this is not a platform device, do not enable PM functionalities */
210 mutex_lock(&bcm_device_lock);
211 if (!bcm_device_exists(bdev)) {
216 if (bdev->irq <= 0) {
221 err = devm_request_irq(&bdev->pdev->dev, bdev->irq, bcm_host_wake,
222 bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
228 device_init_wakeup(&bdev->pdev->dev, true);
230 pm_runtime_set_autosuspend_delay(&bdev->pdev->dev,
231 BCM_AUTOSUSPEND_DELAY);
232 pm_runtime_use_autosuspend(&bdev->pdev->dev);
233 pm_runtime_set_active(&bdev->pdev->dev);
234 pm_runtime_enable(&bdev->pdev->dev);
237 mutex_unlock(&bcm_device_lock);
242 static const struct bcm_set_sleep_mode default_sleep_params = {
243 .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
244 .idle_host = 2, /* idle threshold HOST, in 300ms */
245 .idle_dev = 2, /* idle threshold device, in 300ms */
246 .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
247 .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
248 .allow_host_sleep = 1, /* Allow host sleep in SCO flag */
249 .combine_modes = 1, /* Combine sleep and LPM flag */
250 .tristate_control = 0, /* Allow tri-state control of UART tx flag */
251 /* Irrelevant USB flags */
253 .usb_resume_timeout = 0,
254 .pulsed_host_wake = 0,
258 static int bcm_setup_sleep(struct hci_uart *hu)
260 struct bcm_data *bcm = hu->priv;
262 struct bcm_set_sleep_mode sleep_params = default_sleep_params;
264 sleep_params.host_wake_active = !bcm->dev->irq_active_low;
266 skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
267 &sleep_params, HCI_INIT_TIMEOUT);
269 int err = PTR_ERR(skb);
270 bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
275 bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
280 static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
281 static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
284 static int bcm_set_diag(struct hci_dev *hdev, bool enable)
286 struct hci_uart *hu = hci_get_drvdata(hdev);
287 struct bcm_data *bcm = hu->priv;
290 if (!test_bit(HCI_RUNNING, &hdev->flags))
293 skb = bt_skb_alloc(3, GFP_KERNEL);
297 skb_put_u8(skb, BCM_LM_DIAG_PKT);
298 skb_put_u8(skb, 0xf0);
299 skb_put_u8(skb, enable);
301 skb_queue_tail(&bcm->txq, skb);
302 hci_uart_tx_wakeup(hu);
307 static int bcm_open(struct hci_uart *hu)
309 struct bcm_data *bcm;
312 bt_dev_dbg(hu->hdev, "hu %p", hu);
314 if (!hci_uart_has_flow_control(hu))
317 bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
321 skb_queue_head_init(&bcm->txq);
325 /* If this is a serdev defined device, then only use
326 * serdev open primitive and skip the rest.
329 serdev_device_open(hu->serdev);
336 mutex_lock(&bcm_device_lock);
337 list_for_each(p, &bcm_device_list) {
338 struct bcm_device *dev = list_entry(p, struct bcm_device, list);
340 /* Retrieve saved bcm_device based on parent of the
341 * platform device (saved during device probe) and
342 * parent of tty device used by hci_uart
344 if (hu->tty->dev->parent == dev->pdev->dev.parent) {
346 hu->init_speed = dev->init_speed;
347 hu->oper_speed = dev->oper_speed;
351 bcm_gpio_set_power(bcm->dev, true);
356 mutex_unlock(&bcm_device_lock);
361 static int bcm_close(struct hci_uart *hu)
363 struct bcm_data *bcm = hu->priv;
364 struct bcm_device *bdev = bcm->dev;
366 bt_dev_dbg(hu->hdev, "hu %p", hu);
368 /* If this is a serdev defined device, only use serdev
369 * close primitive and then continue as usual.
372 serdev_device_close(hu->serdev);
374 /* Protect bcm->dev against removal of the device or driver */
375 mutex_lock(&bcm_device_lock);
376 if (bcm_device_exists(bdev)) {
377 bcm_gpio_set_power(bdev, false);
379 pm_runtime_disable(&bdev->pdev->dev);
380 pm_runtime_set_suspended(&bdev->pdev->dev);
382 if (device_can_wakeup(&bdev->pdev->dev)) {
383 devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
384 device_init_wakeup(&bdev->pdev->dev, false);
390 mutex_unlock(&bcm_device_lock);
392 skb_queue_purge(&bcm->txq);
393 kfree_skb(bcm->rx_skb);
400 static int bcm_flush(struct hci_uart *hu)
402 struct bcm_data *bcm = hu->priv;
404 bt_dev_dbg(hu->hdev, "hu %p", hu);
406 skb_queue_purge(&bcm->txq);
411 static int bcm_setup(struct hci_uart *hu)
413 struct bcm_data *bcm = hu->priv;
415 const struct firmware *fw;
419 bt_dev_dbg(hu->hdev, "hu %p", hu);
421 hu->hdev->set_diag = bcm_set_diag;
422 hu->hdev->set_bdaddr = btbcm_set_bdaddr;
424 err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
428 err = reject_firmware(&fw, fw_name, &hu->hdev->dev);
430 bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
434 err = btbcm_patchram(hu->hdev, fw);
436 bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
440 /* Init speed if any */
442 speed = hu->init_speed;
443 else if (hu->proto->init_speed)
444 speed = hu->proto->init_speed;
449 host_set_baudrate(hu, speed);
451 /* Operational speed if any */
453 speed = hu->oper_speed;
454 else if (hu->proto->oper_speed)
455 speed = hu->proto->oper_speed;
460 err = bcm_set_baudrate(hu, speed);
462 host_set_baudrate(hu, speed);
466 release_firmware(fw);
468 err = btbcm_finalize(hu->hdev);
472 if (!bcm_request_irq(bcm))
473 err = bcm_setup_sleep(hu);
478 #define BCM_RECV_LM_DIAG \
479 .type = BCM_LM_DIAG_PKT, \
480 .hlen = BCM_LM_DIAG_SIZE, \
483 .maxlen = BCM_LM_DIAG_SIZE
485 #define BCM_RECV_NULL \
486 .type = BCM_NULL_PKT, \
487 .hlen = BCM_NULL_SIZE, \
490 .maxlen = BCM_NULL_SIZE
492 #define BCM_RECV_TYPE49 \
493 .type = BCM_TYPE49_PKT, \
494 .hlen = BCM_TYPE49_SIZE, \
497 .maxlen = BCM_TYPE49_SIZE
499 #define BCM_RECV_TYPE52 \
500 .type = BCM_TYPE52_PKT, \
501 .hlen = BCM_TYPE52_SIZE, \
504 .maxlen = BCM_TYPE52_SIZE
506 static const struct h4_recv_pkt bcm_recv_pkts[] = {
507 { H4_RECV_ACL, .recv = hci_recv_frame },
508 { H4_RECV_SCO, .recv = hci_recv_frame },
509 { H4_RECV_EVENT, .recv = hci_recv_frame },
510 { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
511 { BCM_RECV_NULL, .recv = hci_recv_diag },
512 { BCM_RECV_TYPE49, .recv = hci_recv_diag },
513 { BCM_RECV_TYPE52, .recv = hci_recv_diag },
516 static int bcm_recv(struct hci_uart *hu, const void *data, int count)
518 struct bcm_data *bcm = hu->priv;
520 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
523 bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
524 bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
525 if (IS_ERR(bcm->rx_skb)) {
526 int err = PTR_ERR(bcm->rx_skb);
527 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
530 } else if (!bcm->rx_skb) {
531 /* Delay auto-suspend when receiving completed packet */
532 mutex_lock(&bcm_device_lock);
533 if (bcm->dev && bcm_device_exists(bcm->dev)) {
534 pm_runtime_get(&bcm->dev->pdev->dev);
535 pm_runtime_mark_last_busy(&bcm->dev->pdev->dev);
536 pm_runtime_put_autosuspend(&bcm->dev->pdev->dev);
538 mutex_unlock(&bcm_device_lock);
544 static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
546 struct bcm_data *bcm = hu->priv;
548 bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
550 /* Prepend skb with frame type */
551 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
552 skb_queue_tail(&bcm->txq, skb);
557 static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
559 struct bcm_data *bcm = hu->priv;
560 struct sk_buff *skb = NULL;
561 struct bcm_device *bdev = NULL;
563 mutex_lock(&bcm_device_lock);
565 if (bcm_device_exists(bcm->dev)) {
567 pm_runtime_get_sync(&bdev->pdev->dev);
568 /* Shall be resumed here */
571 skb = skb_dequeue(&bcm->txq);
574 pm_runtime_mark_last_busy(&bdev->pdev->dev);
575 pm_runtime_put_autosuspend(&bdev->pdev->dev);
578 mutex_unlock(&bcm_device_lock);
584 static int bcm_suspend_device(struct device *dev)
586 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
588 bt_dev_dbg(bdev, "");
590 if (!bdev->is_suspended && bdev->hu) {
591 hci_uart_set_flow_control(bdev->hu, true);
593 /* Once this returns, driver suspends BT via GPIO */
594 bdev->is_suspended = true;
597 /* Suspend the device */
598 if (bdev->device_wakeup) {
599 gpiod_set_value(bdev->device_wakeup, false);
600 bt_dev_dbg(bdev, "suspend, delaying 15 ms");
607 static int bcm_resume_device(struct device *dev)
609 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
611 bt_dev_dbg(bdev, "");
613 if (bdev->device_wakeup) {
614 gpiod_set_value(bdev->device_wakeup, true);
615 bt_dev_dbg(bdev, "resume, delaying 15 ms");
619 /* When this executes, the device has woken up already */
620 if (bdev->is_suspended && bdev->hu) {
621 bdev->is_suspended = false;
623 hci_uart_set_flow_control(bdev->hu, false);
630 #ifdef CONFIG_PM_SLEEP
631 /* Platform suspend callback */
632 static int bcm_suspend(struct device *dev)
634 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
637 bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
639 /* bcm_suspend can be called at any time as long as platform device is
640 * bound, so it should use bcm_device_lock to protect access to hci_uart
641 * and device_wake-up GPIO.
643 mutex_lock(&bcm_device_lock);
648 if (pm_runtime_active(dev))
649 bcm_suspend_device(dev);
651 if (device_may_wakeup(&bdev->pdev->dev)) {
652 error = enable_irq_wake(bdev->irq);
654 bt_dev_dbg(bdev, "BCM irq: enabled");
658 mutex_unlock(&bcm_device_lock);
663 /* Platform resume callback */
664 static int bcm_resume(struct device *dev)
666 struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
668 bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
670 /* bcm_resume can be called at any time as long as platform device is
671 * bound, so it should use bcm_device_lock to protect access to hci_uart
672 * and device_wake-up GPIO.
674 mutex_lock(&bcm_device_lock);
679 if (device_may_wakeup(&bdev->pdev->dev)) {
680 disable_irq_wake(bdev->irq);
681 bt_dev_dbg(bdev, "BCM irq: disabled");
684 bcm_resume_device(dev);
687 mutex_unlock(&bcm_device_lock);
689 pm_runtime_disable(dev);
690 pm_runtime_set_active(dev);
691 pm_runtime_enable(dev);
697 static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false };
698 static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false };
699 static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false };
701 static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
702 { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 },
703 { "shutdown-gpios", &int_last_shutdown_gpios, 1 },
704 { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 },
708 static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false };
709 static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false };
710 static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false };
712 static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
713 { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 },
714 { "shutdown-gpios", &int_first_shutdown_gpios, 1 },
715 { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 },
720 /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
721 static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = {
722 { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */
723 .ident = "Lenovo ThinkPad 8",
725 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
726 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"),
732 static int bcm_resource(struct acpi_resource *ares, void *data)
734 struct bcm_device *dev = data;
735 struct acpi_resource_extended_irq *irq;
736 struct acpi_resource_gpio *gpio;
737 struct acpi_resource_uart_serialbus *sb;
739 switch (ares->type) {
740 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
741 irq = &ares->data.extended_irq;
742 if (irq->polarity != ACPI_ACTIVE_LOW)
743 dev_info(&dev->pdev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
744 dev->irq_active_low = true;
747 case ACPI_RESOURCE_TYPE_GPIO:
748 gpio = &ares->data.gpio;
749 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
750 dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
753 case ACPI_RESOURCE_TYPE_SERIAL_BUS:
754 sb = &ares->data.uart_serial_bus;
755 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
756 dev->init_speed = sb->default_baud_rate;
757 dev->oper_speed = 4000000;
765 /* Always tell the ACPI core to skip this resource */
768 #endif /* CONFIG_ACPI */
770 static int bcm_platform_probe(struct bcm_device *dev)
772 struct platform_device *pdev = dev->pdev;
774 dev->name = dev_name(&pdev->dev);
776 dev->clk = devm_clk_get(&pdev->dev, NULL);
778 dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev,
781 if (IS_ERR(dev->device_wakeup))
782 return PTR_ERR(dev->device_wakeup);
784 dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown",
786 if (IS_ERR(dev->shutdown))
787 return PTR_ERR(dev->shutdown);
789 /* IRQ can be declared in ACPI table as Interrupt or GpioInt */
790 dev->irq = platform_get_irq(pdev, 0);
792 struct gpio_desc *gpio;
794 gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
797 return PTR_ERR(gpio);
799 dev->irq = gpiod_to_irq(gpio);
802 dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);
804 /* Make sure at-least one of the GPIO is defined and that
805 * a name is specified for this instance
807 if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) {
808 dev_err(&pdev->dev, "invalid platform data\n");
816 static int bcm_acpi_probe(struct bcm_device *dev)
818 struct platform_device *pdev = dev->pdev;
819 LIST_HEAD(resources);
820 const struct dmi_system_id *dmi_id;
821 const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
822 const struct acpi_device_id *id;
825 /* Retrieve GPIO data */
826 id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
828 gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data;
830 ret = devm_acpi_dev_add_driver_gpios(&pdev->dev, gpio_mapping);
834 ret = bcm_platform_probe(dev);
838 /* Retrieve UART ACPI info */
839 ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev),
840 &resources, bcm_resource, dev);
843 acpi_dev_free_resource_list(&resources);
845 dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table);
847 bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
849 dev->irq_active_low = true;
855 static int bcm_acpi_probe(struct bcm_device *dev)
859 #endif /* CONFIG_ACPI */
861 static int bcm_probe(struct platform_device *pdev)
863 struct bcm_device *dev;
866 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
872 if (has_acpi_companion(&pdev->dev))
873 ret = bcm_acpi_probe(dev);
875 ret = bcm_platform_probe(dev);
879 platform_set_drvdata(pdev, dev);
881 dev_info(&pdev->dev, "%s device registered.\n", dev->name);
883 /* Place this instance on the device list */
884 mutex_lock(&bcm_device_lock);
885 list_add_tail(&dev->list, &bcm_device_list);
886 mutex_unlock(&bcm_device_lock);
888 bcm_gpio_set_power(dev, false);
893 static int bcm_remove(struct platform_device *pdev)
895 struct bcm_device *dev = platform_get_drvdata(pdev);
897 mutex_lock(&bcm_device_lock);
898 list_del(&dev->list);
899 mutex_unlock(&bcm_device_lock);
901 dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
906 static const struct hci_uart_proto bcm_proto = {
910 .init_speed = 115200,
915 .set_baudrate = bcm_set_baudrate,
917 .enqueue = bcm_enqueue,
918 .dequeue = bcm_dequeue,
922 static const struct acpi_device_id bcm_acpi_match[] = {
923 { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
924 { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
925 { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
926 { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
927 { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
928 { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
929 { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
930 { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
931 { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
932 { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
933 { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
934 { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
935 { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
936 { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
937 { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
938 { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
941 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
944 /* Platform suspend and resume callbacks */
945 static const struct dev_pm_ops bcm_pm_ops = {
946 SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
947 SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
950 static struct platform_driver bcm_driver = {
952 .remove = bcm_remove,
955 .acpi_match_table = ACPI_PTR(bcm_acpi_match),
960 static int bcm_serdev_probe(struct serdev_device *serdev)
962 struct bcm_serdev *bcmdev;
966 bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
970 bcmdev->hu.serdev = serdev;
971 serdev_device_set_drvdata(serdev, bcmdev);
973 err = device_property_read_u32(&serdev->dev, "max-speed", &speed);
975 bcmdev->hu.oper_speed = speed;
977 return hci_uart_register_device(&bcmdev->hu, &bcm_proto);
980 static void bcm_serdev_remove(struct serdev_device *serdev)
982 struct bcm_serdev *bcmdev = serdev_device_get_drvdata(serdev);
984 hci_uart_unregister_device(&bcmdev->hu);
988 static const struct of_device_id bcm_bluetooth_of_match[] = {
989 { .compatible = "brcm,bcm43438-bt" },
992 MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
995 static struct serdev_device_driver bcm_serdev_driver = {
996 .probe = bcm_serdev_probe,
997 .remove = bcm_serdev_remove,
999 .name = "hci_uart_bcm",
1000 .of_match_table = of_match_ptr(bcm_bluetooth_of_match),
1004 int __init bcm_init(void)
1006 /* For now, we need to keep both platform device
1007 * driver (ACPI generated) and serdev driver (DT).
1009 platform_driver_register(&bcm_driver);
1010 serdev_device_driver_register(&bcm_serdev_driver);
1012 return hci_uart_register_proto(&bcm_proto);
1015 int __exit bcm_deinit(void)
1017 platform_driver_unregister(&bcm_driver);
1018 serdev_device_driver_unregister(&bcm_serdev_driver);
1020 return hci_uart_unregister_proto(&bcm_proto);