| /* |
| * |
| * 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 <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/skbuff.h> |
| #include <linux/firmware.h> |
| #include <linux/module.h> |
| #include <linux/acpi.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/tty.h> |
| #include <linux/interrupt.h> |
| #include <linux/dmi.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| |
| #include "btbcm.h" |
| #include "hci_uart.h" |
| |
| #define BCM_LM_DIAG_PKT 0x07 |
| #define BCM_LM_DIAG_SIZE 63 |
| |
| #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
| |
| struct bcm_device { |
| struct list_head list; |
| |
| struct platform_device *pdev; |
| |
| const char *name; |
| struct gpio_desc *device_wakeup; |
| struct gpio_desc *shutdown; |
| |
| struct clk *clk; |
| bool clk_enabled; |
| |
| u32 init_speed; |
| int irq; |
| u8 irq_polarity; |
| |
| #ifdef CONFIG_PM |
| struct hci_uart *hu; |
| bool is_suspended; /* suspend/resume flag */ |
| #endif |
| }; |
| |
| 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 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->pdev->dev); |
| pm_runtime_mark_last_busy(&bdev->pdev->dev); |
| pm_runtime_put_autosuspend(&bdev->pdev->dev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int bcm_request_irq(struct bcm_data *bcm) |
| { |
| struct bcm_device *bdev = bcm->dev; |
| int err = 0; |
| |
| /* 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 = devm_request_irq(&bdev->pdev->dev, bdev->irq, |
| bcm_host_wake, IRQF_TRIGGER_RISING, |
| "host_wake", bdev); |
| if (err) |
| goto unlock; |
| |
| device_init_wakeup(&bdev->pdev->dev, true); |
| |
| pm_runtime_set_autosuspend_delay(&bdev->pdev->dev, |
| BCM_AUTOSUSPEND_DELAY); |
| pm_runtime_use_autosuspend(&bdev->pdev->dev); |
| pm_runtime_set_active(&bdev->pdev->dev); |
| pm_runtime_enable(&bdev->pdev->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_polarity; |
| |
| 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(skb, 1) = BCM_LM_DIAG_PKT; |
| *skb_put(skb, 1) = 0xf0; |
| *skb_put(skb, 1) = 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 (!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->pdev->dev.parent) { |
| bcm->dev = dev; |
| hu->init_speed = dev->init_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); |
| |
| /* 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->pdev->dev); |
| pm_runtime_set_suspended(&bdev->pdev->dev); |
| |
| if (device_can_wakeup(&bdev->pdev->dev)) { |
| devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev); |
| device_init_wakeup(&bdev->pdev->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) |
| hci_uart_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) |
| hci_uart_set_baudrate(hu, speed); |
| } |
| |
| finalize: |
| release_firmware(fw); |
| |
| err = btbcm_finalize(hu->hdev); |
| if (err) |
| return err; |
| |
| err = bcm_request_irq(bcm); |
| if (!err) |
| 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 |
| |
| 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 }, |
| }; |
| |
| 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->pdev->dev); |
| pm_runtime_mark_last_busy(&bcm->dev->pdev->dev); |
| pm_runtime_put_autosuspend(&bcm->dev->pdev->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->pdev->dev); |
| /* Shall be resumed here */ |
| } |
| |
| skb = skb_dequeue(&bcm->txq); |
| |
| if (bdev) { |
| pm_runtime_mark_last_busy(&bdev->pdev->dev); |
| pm_runtime_put_autosuspend(&bdev->pdev->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(&bdev->pdev->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(&bdev->pdev->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 |
| static u8 acpi_active_low = ACPI_ACTIVE_LOW; |
| |
| /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ |
| static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = { |
| { |
| .ident = "Asus T100TA", |
| .matches = { |
| DMI_EXACT_MATCH(DMI_SYS_VENDOR, |
| "ASUSTeK COMPUTER INC."), |
| DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), |
| }, |
| .driver_data = &acpi_active_low, |
| }, |
| { /* 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"), |
| }, |
| .driver_data = &acpi_active_low, |
| }, |
| { } |
| }; |
| |
| 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_polarity = irq->polarity; |
| break; |
| |
| case ACPI_RESOURCE_TYPE_GPIO: |
| gpio = &ares->data.gpio; |
| if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) |
| dev->irq_polarity = gpio->polarity; |
| 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; |
| break; |
| |
| default: |
| break; |
| } |
| |
| /* Always tell the ACPI core to skip this resource */ |
| return 1; |
| } |
| #endif /* CONFIG_ACPI */ |
| |
| static int bcm_platform_probe(struct bcm_device *dev) |
| { |
| struct platform_device *pdev = dev->pdev; |
| |
| dev->name = dev_name(&pdev->dev); |
| |
| dev->clk = devm_clk_get(&pdev->dev, NULL); |
| |
| dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev, |
| "device-wakeup", |
| GPIOD_OUT_LOW); |
| if (IS_ERR(dev->device_wakeup)) |
| return PTR_ERR(dev->device_wakeup); |
| |
| dev->shutdown = devm_gpiod_get_optional(&pdev->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 */ |
| dev->irq = platform_get_irq(pdev, 0); |
| if (dev->irq <= 0) { |
| struct gpio_desc *gpio; |
| |
| gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup", |
| GPIOD_IN); |
| if (IS_ERR(gpio)) |
| return PTR_ERR(gpio); |
| |
| dev->irq = gpiod_to_irq(gpio); |
| } |
| |
| dev_info(&pdev->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(&pdev->dev, "invalid platform data\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_ACPI |
| static int bcm_acpi_probe(struct bcm_device *dev) |
| { |
| struct platform_device *pdev = dev->pdev; |
| 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(pdev->dev.driver->acpi_match_table, &pdev->dev); |
| if (id) |
| gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; |
| |
| ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), |
| gpio_mapping); |
| if (ret) |
| return ret; |
| |
| ret = bcm_platform_probe(dev); |
| if (ret) |
| return ret; |
| |
| /* Retrieve UART ACPI info */ |
| ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev), |
| &resources, bcm_resource, dev); |
| if (ret < 0) |
| return ret; |
| acpi_dev_free_resource_list(&resources); |
| |
| dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table); |
| if (dmi_id) { |
| bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low", |
| dmi_id->ident); |
| dev->irq_polarity = *(u8 *)dmi_id->driver_data; |
| } |
| |
| 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->pdev = pdev; |
| |
| if (has_acpi_companion(&pdev->dev)) |
| ret = bcm_acpi_probe(dev); |
| else |
| ret = bcm_platform_probe(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); |
| |
| acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev)); |
| |
| 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, |
| .oper_speed = 4000000, |
| .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, |
| }, |
| }; |
| |
| int __init bcm_init(void) |
| { |
| platform_driver_register(&bcm_driver); |
| |
| return hci_uart_register_proto(&bcm_proto); |
| } |
| |
| int __exit bcm_deinit(void) |
| { |
| platform_driver_unregister(&bcm_driver); |
| |
| return hci_uart_unregister_proto(&bcm_proto); |
| } |