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path: root/drivers/bluetooth/hci_bcm.c
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Diffstat (limited to 'drivers/bluetooth/hci_bcm.c')
-rw-r--r--drivers/bluetooth/hci_bcm.c133
1 files changed, 115 insertions, 18 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 6a662d0161b4..e2540113d0da 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -27,6 +27,8 @@
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/acpi.h>
+#include <linux/of.h>
+#include <linux/property.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
@@ -34,6 +36,7 @@
#include <linux/interrupt.h>
#include <linux/dmi.h>
#include <linux/pm_runtime.h>
+#include <linux/serdev.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -41,11 +44,15 @@
#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;
@@ -59,6 +66,7 @@ struct bcm_device {
bool clk_enabled;
u32 init_speed;
+ u32 oper_speed;
int irq;
u8 irq_polarity;
@@ -68,6 +76,12 @@ struct bcm_device {
#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;
@@ -79,6 +93,14 @@ struct bcm_data {
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;
@@ -176,7 +198,7 @@ static irqreturn_t bcm_host_wake(int irq, void *data)
static int bcm_request_irq(struct bcm_data *bcm)
{
struct bcm_device *bdev = bcm->dev;
- int err = 0;
+ int err;
/* If this is not a platform device, do not enable PM functionalities */
mutex_lock(&bcm_device_lock);
@@ -185,21 +207,23 @@ static int bcm_request_irq(struct bcm_data *bcm)
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;
+ if (bdev->irq <= 0) {
+ err = -EOPNOTSUPP;
+ goto unlock;
+ }
+
+ 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);
+ 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);
- }
+ 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);
@@ -287,6 +311,14 @@ static int bcm_open(struct hci_uart *hu)
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;
@@ -301,6 +333,7 @@ static int bcm_open(struct hci_uart *hu)
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
bcm->dev = dev;
hu->init_speed = dev->init_speed;
+ hu->oper_speed = dev->oper_speed;
#ifdef CONFIG_PM
dev->hu = hu;
#endif
@@ -321,6 +354,12 @@ static int bcm_close(struct hci_uart *hu)
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)) {
@@ -396,7 +435,7 @@ static int bcm_setup(struct hci_uart *hu)
speed = 0;
if (speed)
- hci_uart_set_baudrate(hu, speed);
+ host_set_baudrate(hu, speed);
/* Operational speed if any */
if (hu->oper_speed)
@@ -409,7 +448,7 @@ static int bcm_setup(struct hci_uart *hu)
if (speed) {
err = bcm_set_baudrate(hu, speed);
if (!err)
- hci_uart_set_baudrate(hu, speed);
+ host_set_baudrate(hu, speed);
}
finalize:
@@ -432,11 +471,19 @@ finalize:
.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)
@@ -697,8 +744,10 @@ static int bcm_resource(struct acpi_resource *ares, void *data)
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
sb = &ares->data.uart_serial_bus;
- if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
+ if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
dev->init_speed = sb->default_baud_rate;
+ dev->oper_speed = 4000000;
+ }
break;
default:
@@ -851,7 +900,6 @@ static const struct hci_uart_proto bcm_proto = {
.name = "Broadcom",
.manufacturer = 15,
.init_speed = 115200,
- .oper_speed = 4000000,
.open = bcm_open,
.close = bcm_close,
.flush = bcm_flush,
@@ -901,9 +949,57 @@ static struct platform_driver bcm_driver = {
},
};
+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);
}
@@ -911,6 +1007,7 @@ int __init bcm_init(void)
int __exit bcm_deinit(void)
{
platform_driver_unregister(&bcm_driver);
+ serdev_device_driver_unregister(&bcm_serdev_driver);
return hci_uart_unregister_proto(&bcm_proto);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.