/* * * Bluetooth HCI UART driver for Broadcom devices * * Copyright (C) 2015 Intel Corporation * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "btbcm.h" #include "hci_uart.h" #define BCM_NULL_PKT 0x00 #define BCM_NULL_SIZE 0 #define BCM_LM_DIAG_PKT 0x07 #define BCM_LM_DIAG_SIZE 63 #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ /* platform device driver resources */ struct bcm_device { struct list_head list; struct device *dev; const char *name; struct gpio_desc *device_wakeup; struct gpio_desc *shutdown; struct clk *clk; bool clk_enabled; u32 init_speed; u32 oper_speed; int irq; bool irq_active_low; #ifdef CONFIG_PM struct hci_uart *hu; bool is_suspended; /* suspend/resume flag */ #endif }; /* serdev driver resources */ struct bcm_serdev { struct hci_uart hu; }; /* generic bcm uart resources */ struct bcm_data { struct sk_buff *rx_skb; struct sk_buff_head txq; struct bcm_device *dev; }; /* List of BCM BT UART devices */ static DEFINE_MUTEX(bcm_device_lock); static LIST_HEAD(bcm_device_list); static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) { if (hu->serdev) serdev_device_set_baudrate(hu->serdev, speed); else hci_uart_set_baudrate(hu, speed); } static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) { struct hci_dev *hdev = hu->hdev; struct sk_buff *skb; struct bcm_update_uart_baud_rate param; if (speed > 3000000) { struct bcm_write_uart_clock_setting clock; clock.type = BCM_UART_CLOCK_48MHZ; bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); /* This Broadcom specific command changes the UART's controller * clock for baud rate > 3000000. */ skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { int err = PTR_ERR(skb); bt_dev_err(hdev, "BCM: failed to write clock (%d)", err); return err; } kfree_skb(skb); } bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); param.zero = cpu_to_le16(0); param.baud_rate = cpu_to_le32(speed); /* This Broadcom specific command changes the UART's controller baud * rate. */ skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { int err = PTR_ERR(skb); bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", err); return err; } kfree_skb(skb); return 0; } /* bcm_device_exists should be protected by bcm_device_lock */ static bool bcm_device_exists(struct bcm_device *device) { struct list_head *p; list_for_each(p, &bcm_device_list) { struct bcm_device *dev = list_entry(p, struct bcm_device, list); if (device == dev) return true; } return false; } static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) { if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) clk_prepare_enable(dev->clk); gpiod_set_value(dev->shutdown, powered); gpiod_set_value(dev->device_wakeup, powered); if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) clk_disable_unprepare(dev->clk); dev->clk_enabled = powered; return 0; } #ifdef CONFIG_PM static irqreturn_t bcm_host_wake(int irq, void *data) { struct bcm_device *bdev = data; bt_dev_dbg(bdev, "Host wake IRQ"); pm_runtime_get(bdev->dev); pm_runtime_mark_last_busy(bdev->dev); pm_runtime_put_autosuspend(bdev->dev); return IRQ_HANDLED; } static int bcm_request_irq(struct bcm_data *bcm) { struct bcm_device *bdev = bcm->dev; int err; /* If this is not a platform device, do not enable PM functionalities */ mutex_lock(&bcm_device_lock); if (!bcm_device_exists(bdev)) { err = -ENODEV; goto unlock; } if (bdev->irq <= 0) { err = -EOPNOTSUPP; goto unlock; } err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, bdev->irq_active_low ? IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING, "host_wake", bdev); if (err) goto unlock; device_init_wakeup(bdev->dev, true); pm_runtime_set_autosuspend_delay(bdev->dev, BCM_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(bdev->dev); pm_runtime_set_active(bdev->dev); pm_runtime_enable(bdev->dev); unlock: mutex_unlock(&bcm_device_lock); return err; } static const struct bcm_set_sleep_mode default_sleep_params = { .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ .idle_host = 2, /* idle threshold HOST, in 300ms */ .idle_dev = 2, /* idle threshold device, in 300ms */ .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ .combine_modes = 1, /* Combine sleep and LPM flag */ .tristate_control = 0, /* Allow tri-state control of UART tx flag */ /* Irrelevant USB flags */ .usb_auto_sleep = 0, .usb_resume_timeout = 0, .pulsed_host_wake = 0, .break_to_host = 0 }; static int bcm_setup_sleep(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; struct sk_buff *skb; struct bcm_set_sleep_mode sleep_params = default_sleep_params; sleep_params.host_wake_active = !bcm->dev->irq_active_low; skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), &sleep_params, HCI_INIT_TIMEOUT); if (IS_ERR(skb)) { int err = PTR_ERR(skb); bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); return err; } kfree_skb(skb); bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); return 0; } #else static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } #endif static int bcm_set_diag(struct hci_dev *hdev, bool enable) { struct hci_uart *hu = hci_get_drvdata(hdev); struct bcm_data *bcm = hu->priv; struct sk_buff *skb; if (!test_bit(HCI_RUNNING, &hdev->flags)) return -ENETDOWN; skb = bt_skb_alloc(3, GFP_KERNEL); if (!skb) return -ENOMEM; skb_put_u8(skb, BCM_LM_DIAG_PKT); skb_put_u8(skb, 0xf0); skb_put_u8(skb, enable); skb_queue_tail(&bcm->txq, skb); hci_uart_tx_wakeup(hu); return 0; } static int bcm_open(struct hci_uart *hu) { struct bcm_data *bcm; struct list_head *p; bt_dev_dbg(hu->hdev, "hu %p", hu); bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); if (!bcm) return -ENOMEM; skb_queue_head_init(&bcm->txq); hu->priv = bcm; /* If this is a serdev defined device, then only use * serdev open primitive and skip the rest. */ if (hu->serdev) { serdev_device_open(hu->serdev); goto out; } if (!hu->tty->dev) goto out; mutex_lock(&bcm_device_lock); list_for_each(p, &bcm_device_list) { struct bcm_device *dev = list_entry(p, struct bcm_device, list); /* Retrieve saved bcm_device based on parent of the * platform device (saved during device probe) and * parent of tty device used by hci_uart */ if (hu->tty->dev->parent == dev->dev->parent) { bcm->dev = dev; hu->init_speed = dev->init_speed; hu->oper_speed = dev->oper_speed; #ifdef CONFIG_PM dev->hu = hu; #endif bcm_gpio_set_power(bcm->dev, true); break; } } mutex_unlock(&bcm_device_lock); out: return 0; } static int bcm_close(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; struct bcm_device *bdev = bcm->dev; bt_dev_dbg(hu->hdev, "hu %p", hu); /* If this is a serdev defined device, only use serdev * close primitive and then continue as usual. */ if (hu->serdev) serdev_device_close(hu->serdev); /* Protect bcm->dev against removal of the device or driver */ mutex_lock(&bcm_device_lock); if (bcm_device_exists(bdev)) { bcm_gpio_set_power(bdev, false); #ifdef CONFIG_PM pm_runtime_disable(bdev->dev); pm_runtime_set_suspended(bdev->dev); if (device_can_wakeup(bdev->dev)) { devm_free_irq(bdev->dev, bdev->irq, bdev); device_init_wakeup(bdev->dev, false); } bdev->hu = NULL; #endif } mutex_unlock(&bcm_device_lock); skb_queue_purge(&bcm->txq); kfree_skb(bcm->rx_skb); kfree(bcm); hu->priv = NULL; return 0; } static int bcm_flush(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; bt_dev_dbg(hu->hdev, "hu %p", hu); skb_queue_purge(&bcm->txq); return 0; } static int bcm_setup(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; char fw_name[64]; const struct firmware *fw; unsigned int speed; int err; bt_dev_dbg(hu->hdev, "hu %p", hu); hu->hdev->set_diag = bcm_set_diag; hu->hdev->set_bdaddr = btbcm_set_bdaddr; err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); if (err) return err; err = request_firmware(&fw, fw_name, &hu->hdev->dev); if (err < 0) { bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); return 0; } err = btbcm_patchram(hu->hdev, fw); if (err) { bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); goto finalize; } /* Init speed if any */ if (hu->init_speed) speed = hu->init_speed; else if (hu->proto->init_speed) speed = hu->proto->init_speed; else speed = 0; if (speed) host_set_baudrate(hu, speed); /* Operational speed if any */ if (hu->oper_speed) speed = hu->oper_speed; else if (hu->proto->oper_speed) speed = hu->proto->oper_speed; else speed = 0; if (speed) { err = bcm_set_baudrate(hu, speed); if (!err) host_set_baudrate(hu, speed); } finalize: release_firmware(fw); err = btbcm_finalize(hu->hdev); if (err) return err; if (!bcm_request_irq(bcm)) err = bcm_setup_sleep(hu); return err; } #define BCM_RECV_LM_DIAG \ .type = BCM_LM_DIAG_PKT, \ .hlen = BCM_LM_DIAG_SIZE, \ .loff = 0, \ .lsize = 0, \ .maxlen = BCM_LM_DIAG_SIZE #define BCM_RECV_NULL \ .type = BCM_NULL_PKT, \ .hlen = BCM_NULL_SIZE, \ .loff = 0, \ .lsize = 0, \ .maxlen = BCM_NULL_SIZE static const struct h4_recv_pkt bcm_recv_pkts[] = { { H4_RECV_ACL, .recv = hci_recv_frame }, { H4_RECV_SCO, .recv = hci_recv_frame }, { H4_RECV_EVENT, .recv = hci_recv_frame }, { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, { BCM_RECV_NULL, .recv = hci_recv_diag }, }; static int bcm_recv(struct hci_uart *hu, const void *data, int count) { struct bcm_data *bcm = hu->priv; if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) return -EUNATCH; bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); if (IS_ERR(bcm->rx_skb)) { int err = PTR_ERR(bcm->rx_skb); bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); bcm->rx_skb = NULL; return err; } else if (!bcm->rx_skb) { /* Delay auto-suspend when receiving completed packet */ mutex_lock(&bcm_device_lock); if (bcm->dev && bcm_device_exists(bcm->dev)) { pm_runtime_get(bcm->dev->dev); pm_runtime_mark_last_busy(bcm->dev->dev); pm_runtime_put_autosuspend(bcm->dev->dev); } mutex_unlock(&bcm_device_lock); } return count; } static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) { struct bcm_data *bcm = hu->priv; bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); /* Prepend skb with frame type */ memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); skb_queue_tail(&bcm->txq, skb); return 0; } static struct sk_buff *bcm_dequeue(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; struct sk_buff *skb = NULL; struct bcm_device *bdev = NULL; mutex_lock(&bcm_device_lock); if (bcm_device_exists(bcm->dev)) { bdev = bcm->dev; pm_runtime_get_sync(bdev->dev); /* Shall be resumed here */ } skb = skb_dequeue(&bcm->txq); if (bdev) { pm_runtime_mark_last_busy(bdev->dev); pm_runtime_put_autosuspend(bdev->dev); } mutex_unlock(&bcm_device_lock); return skb; } #ifdef CONFIG_PM static int bcm_suspend_device(struct device *dev) { struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); bt_dev_dbg(bdev, ""); if (!bdev->is_suspended && bdev->hu) { hci_uart_set_flow_control(bdev->hu, true); /* Once this returns, driver suspends BT via GPIO */ bdev->is_suspended = true; } /* Suspend the device */ if (bdev->device_wakeup) { gpiod_set_value(bdev->device_wakeup, false); bt_dev_dbg(bdev, "suspend, delaying 15 ms"); mdelay(15); } return 0; } static int bcm_resume_device(struct device *dev) { struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); bt_dev_dbg(bdev, ""); if (bdev->device_wakeup) { gpiod_set_value(bdev->device_wakeup, true); bt_dev_dbg(bdev, "resume, delaying 15 ms"); mdelay(15); } /* When this executes, the device has woken up already */ if (bdev->is_suspended && bdev->hu) { bdev->is_suspended = false; hci_uart_set_flow_control(bdev->hu, false); } return 0; } #endif #ifdef CONFIG_PM_SLEEP /* Platform suspend callback */ static int bcm_suspend(struct device *dev) { struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); int error; bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); /* bcm_suspend can be called at any time as long as platform device is * bound, so it should use bcm_device_lock to protect access to hci_uart * and device_wake-up GPIO. */ mutex_lock(&bcm_device_lock); if (!bdev->hu) goto unlock; if (pm_runtime_active(dev)) bcm_suspend_device(dev); if (device_may_wakeup(dev)) { error = enable_irq_wake(bdev->irq); if (!error) bt_dev_dbg(bdev, "BCM irq: enabled"); } unlock: mutex_unlock(&bcm_device_lock); return 0; } /* Platform resume callback */ static int bcm_resume(struct device *dev) { struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); /* bcm_resume can be called at any time as long as platform device is * bound, so it should use bcm_device_lock to protect access to hci_uart * and device_wake-up GPIO. */ mutex_lock(&bcm_device_lock); if (!bdev->hu) goto unlock; if (device_may_wakeup(dev)) { disable_irq_wake(bdev->irq); bt_dev_dbg(bdev, "BCM irq: disabled"); } bcm_resume_device(dev); unlock: mutex_unlock(&bcm_device_lock); pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); return 0; } #endif static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, { }, }; static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, { }, }; #ifdef CONFIG_ACPI /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = { { .ident = "Asus T100TA", .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), }, }, { .ident = "Asus T100CHI", .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"), }, }, { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ .ident = "Lenovo ThinkPad 8", .matches = { DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), }, }, { } }; static int bcm_resource(struct acpi_resource *ares, void *data) { struct bcm_device *dev = data; struct acpi_resource_extended_irq *irq; struct acpi_resource_gpio *gpio; struct acpi_resource_uart_serialbus *sb; switch (ares->type) { case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: irq = &ares->data.extended_irq; dev->irq_active_low = irq->polarity == ACPI_ACTIVE_LOW; break; case ACPI_RESOURCE_TYPE_GPIO: gpio = &ares->data.gpio; if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; break; case ACPI_RESOURCE_TYPE_SERIAL_BUS: sb = &ares->data.uart_serial_bus; if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { dev->init_speed = sb->default_baud_rate; dev->oper_speed = 4000000; } break; default: break; } /* Always tell the ACPI core to skip this resource */ return 1; } #endif /* CONFIG_ACPI */ static int bcm_get_resources(struct bcm_device *dev) { dev->name = dev_name(dev->dev); dev->clk = devm_clk_get(dev->dev, NULL); dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", GPIOD_OUT_LOW); if (IS_ERR(dev->device_wakeup)) return PTR_ERR(dev->device_wakeup); dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", GPIOD_OUT_LOW); if (IS_ERR(dev->shutdown)) return PTR_ERR(dev->shutdown); /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ if (dev->irq <= 0) { struct gpio_desc *gpio; gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", GPIOD_IN); if (IS_ERR(gpio)) return PTR_ERR(gpio); dev->irq = gpiod_to_irq(gpio); } dev_info(dev->dev, "BCM irq: %d\n", dev->irq); /* Make sure at-least one of the GPIO is defined and that * a name is specified for this instance */ if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) { dev_err(dev->dev, "invalid platform data\n"); return -EINVAL; } return 0; } #ifdef CONFIG_ACPI static int bcm_acpi_probe(struct bcm_device *dev) { LIST_HEAD(resources); const struct dmi_system_id *dmi_id; const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; const struct acpi_device_id *id; int ret; /* Retrieve GPIO data */ id = acpi_match_device(dev->dev->driver->acpi_match_table, dev->dev); if (id) gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); if (ret) return ret; /* Retrieve UART ACPI info */ ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), &resources, bcm_resource, dev); if (ret < 0) return ret; acpi_dev_free_resource_list(&resources); dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); if (dmi_id) { bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low", dmi_id->ident); dev->irq_active_low = true; } return 0; } #else static int bcm_acpi_probe(struct bcm_device *dev) { return -EINVAL; } #endif /* CONFIG_ACPI */ static int bcm_probe(struct platform_device *pdev) { struct bcm_device *dev; int ret; dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); if (!dev) return -ENOMEM; dev->dev = &pdev->dev; dev->irq = platform_get_irq(pdev, 0); if (has_acpi_companion(&pdev->dev)) { ret = bcm_acpi_probe(dev); if (ret) return ret; } ret = bcm_get_resources(dev); if (ret) return ret; platform_set_drvdata(pdev, dev); dev_info(&pdev->dev, "%s device registered.\n", dev->name); /* Place this instance on the device list */ mutex_lock(&bcm_device_lock); list_add_tail(&dev->list, &bcm_device_list); mutex_unlock(&bcm_device_lock); bcm_gpio_set_power(dev, false); return 0; } static int bcm_remove(struct platform_device *pdev) { struct bcm_device *dev = platform_get_drvdata(pdev); mutex_lock(&bcm_device_lock); list_del(&dev->list); mutex_unlock(&bcm_device_lock); dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); return 0; } static const struct hci_uart_proto bcm_proto = { .id = HCI_UART_BCM, .name = "Broadcom", .manufacturer = 15, .init_speed = 115200, .open = bcm_open, .close = bcm_close, .flush = bcm_flush, .setup = bcm_setup, .set_baudrate = bcm_set_baudrate, .recv = bcm_recv, .enqueue = bcm_enqueue, .dequeue = bcm_dequeue, }; #ifdef CONFIG_ACPI static const struct acpi_device_id bcm_acpi_match[] = { { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, { }, }; MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); #endif /* Platform suspend and resume callbacks */ static const struct dev_pm_ops bcm_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) }; static struct platform_driver bcm_driver = { .probe = bcm_probe, .remove = bcm_remove, .driver = { .name = "hci_bcm", .acpi_match_table = ACPI_PTR(bcm_acpi_match), .pm = &bcm_pm_ops, }, }; static int bcm_serdev_probe(struct serdev_device *serdev) { struct bcm_serdev *bcmdev; u32 speed; int err; bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); if (!bcmdev) return -ENOMEM; bcmdev->hu.serdev = serdev; serdev_device_set_drvdata(serdev, bcmdev); err = device_property_read_u32(&serdev->dev, "max-speed", &speed); if (!err) bcmdev->hu.oper_speed = speed; return hci_uart_register_device(&bcmdev->hu, &bcm_proto); } static void bcm_serdev_remove(struct serdev_device *serdev) { struct bcm_serdev *bcmdev = serdev_device_get_drvdata(serdev); hci_uart_unregister_device(&bcmdev->hu); } #ifdef CONFIG_OF static const struct of_device_id bcm_bluetooth_of_match[] = { { .compatible = "brcm,bcm43438-bt" }, { }, }; MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); #endif static struct serdev_device_driver bcm_serdev_driver = { .probe = bcm_serdev_probe, .remove = bcm_serdev_remove, .driver = { .name = "hci_uart_bcm", .of_match_table = of_match_ptr(bcm_bluetooth_of_match), }, }; int __init bcm_init(void) { /* For now, we need to keep both platform device * driver (ACPI generated) and serdev driver (DT). */ platform_driver_register(&bcm_driver); serdev_device_driver_register(&bcm_serdev_driver); return hci_uart_register_proto(&bcm_proto); } int __exit bcm_deinit(void) { platform_driver_unregister(&bcm_driver); serdev_device_driver_unregister(&bcm_serdev_driver); return hci_uart_unregister_proto(&bcm_proto); }