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authorAbhishek Pandit-Subedi <abhishekpandit@chromium.org>2019-11-26 08:17:32 +0100
committerJohan Hedberg <johan.hedberg@intel.com>2019-11-27 09:10:06 +0200
commiteb762b94111b646b4f116ebfdbfcadbad14e12b3 (patch)
tree65a9422bd1423389ea2fb461d64813c61206c170 /drivers/bluetooth
parent6fc0e19036d6198b9287bb74c0c9df7c17ec8c2e (diff)
downloadlinux-next-eb762b94111b646b4f116ebfdbfcadbad14e12b3.tar.gz
Bluetooth: hci_bcm: Support pcm params in dts
BCM chips may require configuration of PCM to operate correctly and there is a vendor specific HCI command to do this. Add support in the hci_bcm driver to parse this from devicetree and configure the chip. Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_bcm.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 0200eff12bc9..f8f5c593a05c 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -122,6 +122,7 @@ struct bcm_device {
bool is_suspended;
#endif
bool no_early_set_baudrate;
+ u8 pcm_int_params[5];
};
/* generic bcm uart resources */
@@ -594,6 +595,16 @@ static int bcm_setup(struct hci_uart *hu)
host_set_baudrate(hu, speed);
}
+ /* PCM parameters if provided */
+ if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) {
+ struct bcm_set_pcm_int_params params;
+
+ btbcm_read_pcm_int_params(hu->hdev, &params);
+
+ memcpy(&params, bcm->dev->pcm_int_params, 5);
+ btbcm_write_pcm_int_params(hu->hdev, &params);
+ }
+
finalize:
release_firmware(fw);
@@ -1131,6 +1142,8 @@ static int bcm_acpi_probe(struct bcm_device *dev)
static int bcm_of_probe(struct bcm_device *bdev)
{
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);
return 0;
}
@@ -1146,6 +1159,9 @@ static int bcm_probe(struct platform_device *pdev)
dev->dev = &pdev->dev;
dev->irq = platform_get_irq(pdev, 0);
+ /* Initialize routing field to an unused value */
+ dev->pcm_int_params[0] = 0xff;
+
if (has_acpi_companion(&pdev->dev)) {
ret = bcm_acpi_probe(dev);
if (ret)
@@ -1406,6 +1422,9 @@ static int bcm_serdev_probe(struct serdev_device *serdev)
bcmdev->serdev_hu.serdev = serdev;
serdev_device_set_drvdata(serdev, bcmdev);
+ /* Initialize routing field to an unused value */
+ bcmdev->pcm_int_params[0] = 0xff;
+
if (has_acpi_companion(&serdev->dev))
err = bcm_acpi_probe(bcmdev);
else