Since SIG has not yet clearly defined the specification for ISO data transmission over USB, MediaTek has adopted a method of adding an additional interrupt endpoint for ISO data transmission. This approach differs from the current method used in the Bluetooth upstream driver, which utilizes existing bulk endpoints. The interrupt endpoint provides guaranteed bandwidth, sufficient maximum data length for ISO packets and error checking. Driver sets up ISO interface and endpoints in btusb_mtk_setup and clears the setup in btusb_mtk_shutdown. These flow can't move to btmtk.c due to btusb_driver is only defined in btusb.c when claiming/relaesing interface. Once ISO interface is claimed, driver can use specific interrupt endpoint to send and receive iso data. ISO packet anchor stops when driver suspending and resubmit interrupt urb for ISO data when driver resuming. --- Change from v5 to v6: fix test bot report error -move usb.h declaration position to each c file. -fix returned value in btmtk.h when returning a pointer. -simplify commit message to avoid word number limitation. --- Chris Lu (8): Bluetooth: btusb: mediatek: remove the unnecessary goto tag Bluetooth: btusb: mediatek: return error for failed reg access Bluetooth: btmtk: rename btmediatek_data Bluetooth: btusb: add callback function in btusb suspend/resume Bluetooth: btmtk: move btusb_mtk_hci_wmt_sync to btmtk.c Bluetooth: btmtk: move btusb_mtk_[setup, shutdown] to btmtk.c Bluetooth: btmtk: move btusb_recv_acl_mtk to btmtk.c Bluetooth: btusb: mediatek: add ISO data transmission functions drivers/bluetooth/btmtk.c | 1059 ++++++++++++++++++++++++++++++++- drivers/bluetooth/btmtk.h | 91 ++- drivers/bluetooth/btmtksdio.c | 1 + drivers/bluetooth/btmtkuart.c | 1 + drivers/bluetooth/btusb.c | 751 +++-------------------- 5 files changed, 1219 insertions(+), 684 deletions(-) -- 2.18.0
