diff options
| author | Loic Poulain <loic.poulain@intel.com> | 2015-09-04 17:54:34 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-09-17 13:20:05 +0200 |
| commit | 145f2368c5fd7962e37315ccc092670743019d08 (patch) | |
| tree | 8da5f5be3f49f6a2a68cebfb67df221c4b11f958 /drivers/bluetooth | |
| parent | a9cb0fe4895cae95b49934af6fdcc54aa04e723d (diff) | |
| download | linux-145f2368c5fd7962e37315ccc092670743019d08.tar.gz | |
Bluetooth: btintel: Add Device Configuration support
btintel_load_ddc_config retrieves the ddc file and sends its content
via DDC commands (opcode 0xfc8b).
The ddc file should contain one or more DDC structures.
A DDC structure is composed of the folowing fields:
field: | DDC LEN | DDC ID | DDC VALUE |
size: | 1 byte | 2 bytes | DDC LEN - 2 |
Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btintel.c | 46 | ||||
| -rw-r--r-- | drivers/bluetooth/btintel.h | 7 |
2 files changed, 53 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); diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h index a49c8dbbb4b7..52deaf2817cf 100644 --- a/drivers/bluetooth/btintel.h +++ b/drivers/bluetooth/btintel.h @@ -78,6 +78,7 @@ void btintel_hw_error(struct hci_dev *hdev, u8 code); void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver); int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen, const void *param); +int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name); #else @@ -106,4 +107,10 @@ static inline int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, return -EOPNOTSUPP; } +static inline int btintel_load_ddc_config(struct hci_dev *hdev, + const char *ddc_name) +{ + return -EOPNOTSUPP; +} + #endif |