#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 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_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(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_DBG("hu %p", hu);
+ bt_dev_dbg(hu->hdev, "hu %p", hu);
bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
if (!bcm)
skb_queue_head_init(&bcm->txq);
hu->priv = bcm;
+
+ 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);
+
return 0;
}
static int bcm_close(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
+ struct bcm_device *bdev = bcm->dev;
- BT_DBG("hu %p", hu);
+ 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);
{
struct bcm_data *bcm = hu->priv;
- BT_DBG("hu %p", hu);
+ bt_dev_dbg(hu->hdev, "hu %p", hu);
skb_queue_purge(&bcm->txq);
static int bcm_setup(struct hci_uart *hu)
{
- BT_DBG("hu %p", 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;
- return btbcm_setup_patchram(hu->hdev);
+ 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 },
+ { 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)
bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
if (IS_ERR(bcm->rx_skb)) {
int err = PTR_ERR(bcm->rx_skb);
- BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
+ 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;
{
struct bcm_data *bcm = hu->priv;
- BT_DBG("hu %p skb %p", hu, skb);
+ bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
/* Prepend skb with frame type */
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
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;
- return skb_dequeue(&bcm->txq);
+ 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 device_wakeup_gpios = { 0, 0, false };
+static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
+static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };
+
+static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
+ { "device-wakeup-gpios", &device_wakeup_gpios, 1 },
+ { "shutdown-gpios", &shutdown_gpios, 1 },
+ { "host-wakeup-gpios", &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,
+ },
+ { }
+};
+
+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;
+}
+
+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;
+ int ret;
+
+ /* Retrieve GPIO data */
+ dev->name = dev_name(&pdev->dev);
+ ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
+ acpi_bcm_default_gpios);
+ if (ret)
+ return ret;
+
+ 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;
+ }
+
+ /* 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;
+
+ ret = bcm_acpi_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 = "BCM",
+ .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[] = {
+ { "BCM2E39", 0 },
+ { "BCM2E67", 0 },
+ { },
+};
+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);
}
Code Review / kvmfornfv.git / blobdiff