diff options
Diffstat (limited to 'drivers/bluetooth/btintel.c')
| -rw-r--r-- | drivers/bluetooth/btintel.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c index 048423fd83bf..9e18988375eb 100644 --- a/drivers/bluetooth/btintel.c +++ b/drivers/bluetooth/btintel.c @@ -22,6 +22,7 @@ */ #include <linux/module.h> +#include <linux/firmware.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> @@ -169,6 +170,51 @@ int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen, } EXPORT_SYMBOL_GPL(btintel_secure_send); +int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name) +{ + const struct firmware *fw; + struct sk_buff *skb; + const u8 *fw_ptr; + int err; + + err = request_firmware_direct(&fw, ddc_name, &hdev->dev); + if (err < 0) { + bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)", + ddc_name, err); + return err; + } + + bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name); + + fw_ptr = fw->data; + + /* DDC file contains one or more DDC structure which has + * Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2). + */ + while (fw->size > fw_ptr - fw->data) { + u8 cmd_plen = fw_ptr[0] + sizeof(u8); + + skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr, + HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)", + PTR_ERR(skb)); + release_firmware(fw); + return PTR_ERR(skb); + } + + fw_ptr += cmd_plen; + kfree_skb(skb); + } + + release_firmware(fw); + + bt_dev_info(hdev, "Applying Intel DDC parameters completed"); + + return 0; +} +EXPORT_SYMBOL_GPL(btintel_load_ddc_config); + MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION); MODULE_VERSION(VERSION); |