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From 8b4d7321625cc8403a9ce7f050bd8d1b4ef7446d Mon Sep 17 00:00:00 2001
From: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Date: Tue, 26 Nov 2019 08:17:32 +0100
Subject: [PATCH] Bluetooth: hci_bcm: Support pcm params in dts
commit eb762b94111b646b4f116ebfdbfcadbad14e12b3 upstream.
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>
---
drivers/bluetooth/hci_bcm.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -123,6 +123,7 @@ struct bcm_device {
bool is_suspended;
#endif
bool no_early_set_baudrate;
+ u8 pcm_int_params[5];
};
/* generic bcm uart resources */
@@ -597,6 +598,16 @@ 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, ¶ms);
+
+ memcpy(¶ms, bcm->dev->pcm_int_params, 5);
+ btbcm_write_pcm_int_params(hu->hdev, ¶ms);
+ }
+
finalize:
release_firmware(fw);
@@ -1134,6 +1145,8 @@ static int bcm_acpi_probe(struct bcm_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;
}
@@ -1149,6 +1162,9 @@ static int bcm_probe(struct platform_dev
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)
@@ -1409,6 +1425,9 @@ static int bcm_serdev_probe(struct serde
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
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