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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.c81
1 files changed, 66 insertions, 15 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index d634a27bc850..d7e0b75db8a6 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -20,6 +20,7 @@
#include <linux/regulator/consumer.h>
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
#include <linux/tty.h>
#include <linux/interrupt.h>
#include <linux/dmi.h>
@@ -52,10 +53,12 @@
* struct bcm_device_data - device specific data
* @no_early_set_baudrate: Disallow set baudrate before driver setup()
* @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
+ * @max_autobaud_speed: max baudrate supported by device in autobaud mode
*/
struct bcm_device_data {
bool no_early_set_baudrate;
bool drive_rts_on_open;
+ u32 max_autobaud_speed;
};
/**
@@ -98,6 +101,8 @@ struct bcm_device_data {
* @no_early_set_baudrate: don't set_baudrate before setup()
* @drive_rts_on_open: drive RTS signal on ->open() when platform requires it
* @pcm_int_params: keep the initial PCM configuration
+ * @use_autobaud_mode: start Bluetooth device in autobaud mode
+ * @max_autobaud_speed: max baudrate supported by device in autobaud mode
*/
struct bcm_device {
/* Must be the first member, hci_serdev.c expects this. */
@@ -135,7 +140,9 @@ struct bcm_device {
#endif
bool no_early_set_baudrate;
bool drive_rts_on_open;
+ bool use_autobaud_mode;
u8 pcm_int_params[5];
+ u32 max_autobaud_speed;
};
/* generic bcm uart resources */
@@ -471,15 +478,20 @@ static int bcm_open(struct hci_uart *hu)
out:
if (bcm->dev) {
- if (bcm->dev->drive_rts_on_open)
+ if (bcm->dev->use_autobaud_mode)
+ hci_uart_set_flow_control(hu, false); /* Assert BT_UART_CTS_N */
+ else if (bcm->dev->drive_rts_on_open)
hci_uart_set_flow_control(hu, true);
- hu->init_speed = bcm->dev->init_speed;
+ if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed)
+ hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed);
+ else
+ hu->init_speed = bcm->dev->init_speed;
/* If oper_speed is set, ldisc/serdev will set the baudrate
* before calling setup()
*/
- if (!bcm->dev->no_early_set_baudrate)
+ if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode)
hu->oper_speed = bcm->dev->oper_speed;
err = bcm_gpio_set_power(bcm->dev, true);
@@ -563,6 +575,7 @@ static int bcm_setup(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
bool fw_load_done = false;
+ bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0);
unsigned int speed;
int err;
@@ -571,7 +584,7 @@ static int bcm_setup(struct hci_uart *hu)
hu->hdev->set_diag = bcm_set_diag;
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
- err = btbcm_initialize(hu->hdev, &fw_load_done);
+ err = btbcm_initialize(hu->hdev, &fw_load_done, use_autobaud_mode);
if (err)
return err;
@@ -579,8 +592,8 @@ static int bcm_setup(struct hci_uart *hu)
return 0;
/* Init speed if any */
- if (hu->init_speed)
- speed = hu->init_speed;
+ if (bcm->dev && bcm->dev->init_speed)
+ speed = bcm->dev->init_speed;
else if (hu->proto->init_speed)
speed = hu->proto->init_speed;
else
@@ -615,7 +628,7 @@ static int bcm_setup(struct hci_uart *hu)
btbcm_write_pcm_int_params(hu->hdev, &params);
}
- err = btbcm_finalize(hu->hdev, &fw_load_done);
+ err = btbcm_finalize(hu->hdev, &fw_load_done, use_autobaud_mode);
if (err)
return err;
@@ -870,8 +883,24 @@ unlock:
#endif
/* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
+static struct gpiod_lookup_table asus_tf103c_irq_gpios = {
+ .dev_id = "serial0-0",
+ .table = {
+ GPIO_LOOKUP("INT33FC:02", 17, "host-wakeup-alt", GPIO_ACTIVE_HIGH),
+ { }
+ },
+};
+
static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
{
+ .ident = "Asus TF103C",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
+ },
+ .driver_data = &asus_tf103c_irq_gpios,
+ },
+ {
.ident = "Meegopad T08",
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
@@ -1027,7 +1056,8 @@ static struct clk *bcm_get_txco(struct device *dev)
static int bcm_get_resources(struct bcm_device *dev)
{
- const struct dmi_system_id *dmi_id;
+ const struct dmi_system_id *broken_irq_dmi_id;
+ const char *irq_con_id = "host-wakeup";
int err;
dev->name = dev_name(dev->dev);
@@ -1083,23 +1113,33 @@ static int bcm_get_resources(struct bcm_device *dev)
if (err)
return err;
+ broken_irq_dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
+ if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) {
+ gpiod_add_lookup_table(broken_irq_dmi_id->driver_data);
+ irq_con_id = "host-wakeup-alt";
+ dev->irq_active_low = false;
+ dev->irq = 0;
+ }
+
/* 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);
+ gpio = devm_gpiod_get_optional(dev->dev, irq_con_id, GPIOD_IN);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
dev->irq = gpiod_to_irq(gpio);
}
- dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
- if (dmi_id) {
- dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
- dmi_id->ident);
- dev->irq = 0;
+ if (broken_irq_dmi_id) {
+ if (broken_irq_dmi_id->driver_data) {
+ gpiod_remove_lookup_table(broken_irq_dmi_id->driver_data);
+ } else {
+ dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
+ broken_irq_dmi_id->ident);
+ dev->irq = 0;
+ }
}
dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
@@ -1169,6 +1209,8 @@ static int bcm_acpi_probe(struct bcm_device *dev)
static int bcm_of_probe(struct bcm_device *bdev)
{
+ bdev->use_autobaud_mode = device_property_read_bool(bdev->dev,
+ "brcm,requires-autobaud-mode");
device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
device_property_read_u8_array(bdev->dev, "brcm,bt-pcm-int-params",
bdev->pcm_int_params, 5);
@@ -1484,6 +1526,7 @@ static int bcm_serdev_probe(struct serdev_device *serdev)
data = device_get_match_data(bcmdev->dev);
if (data) {
+ bcmdev->max_autobaud_speed = data->max_autobaud_speed;
bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
bcmdev->drive_rts_on_open = data->drive_rts_on_open;
}
@@ -1507,15 +1550,23 @@ static struct bcm_device_data bcm43438_device_data = {
.drive_rts_on_open = true,
};
+static struct bcm_device_data cyw55572_device_data = {
+ .max_autobaud_speed = 921600,
+};
+
static const struct of_device_id bcm_bluetooth_of_match[] = {
{ .compatible = "brcm,bcm20702a1" },
{ .compatible = "brcm,bcm4329-bt" },
{ .compatible = "brcm,bcm4330-bt" },
{ .compatible = "brcm,bcm4334-bt" },
{ .compatible = "brcm,bcm4345c5" },
+ { .compatible = "brcm,bcm43430a0-bt" },
+ { .compatible = "brcm,bcm43430a1-bt" },
{ .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data },
+ { .compatible = "brcm,bcm4349-bt", .data = &bcm43438_device_data },
{ .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
{ .compatible = "brcm,bcm4335a0" },
+ { .compatible = "infineon,cyw55572-bt", .data = &cyw55572_device_data },
{ },
};
MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.