BMC/Intel-BMC/linux.git/drivers/usb/dwc2/core.c, branch dev-4.18

usb: dwc2: Fix kernel doc's warnings.

2018-05-21T07:02:13+00:00

Added descriptions for all not described parameters. Fix all kernel doc's warnings. Acked-by: Minas Harutyunyan Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Make dwc2_force_mode() static

2018-03-13T08:47:58+00:00

Declared dwc2_force_mode() function as static, because it was used only in core.c file, for fixing sparse error. Acked-by: John Youn Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Force mode optimizations

2018-03-13T08:47:58+00:00

If the dr_mode is USB_DR_MODE_OTG, forcing the mode is needed during driver probe to get the host and device specific HW parameters. Then we clear the force mode bits so that the core operates in OTG mode. The force mode bits should not be touched at any other time during the driver lifetime and they should be preserved whenever the GUSBCFG register is written to. The force mode bit values will persist across soft resets of the core. If the dr_mode is either USB_DR_MODE_HOST or USB_DR_MODE_PERIPHERAL, the force mode is set just once at probe to configure the core as either a host or peripheral. Given the above, we no longer need any other reset delays, force delays, or any forced modes anywhere else in the driver. So replace all calls to dwc2_core_reset_and_force_dr_mode() with dwc2_core_reset() and remove all other unnecessary delays. Also remove the dwc2_force_mode_if_needed() function since the "if needed" part is already taken care of by the polling in dwc2_force_mode(). Finally, remove all other calls to dwc2_clear_force_mode(). Tested-by: Stefan Wahren Signed-off-by: John Youn Signed-off-by: Vardan Mikayelyan Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Add dwc2_enter_hibernation(), dwc2_exit_hibernation()

2018-03-13T08:47:56+00:00

These are wrapper functions which are calling device or host enter/exit hibernation functions. Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Add host/device hibernation functions

2018-03-13T08:47:56+00:00

Add host/device hibernation functions which must be wrapped by core's dwc2_enter_hibernation()/dwc2_exit_hibernation() functions. Make dwc2_backup_global_registers dwc2_restore_global_register non-static to use them in both host/gadget sides. Added function names: dwc2_gadget_enter_hibernation() dwc2_gadget_exit_hibernation() dwc2_host_enter_hibernation() dwc2_host_exit_hibernation() Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Artur Petrosyan Signed-off-by: Minas Harutyunyan Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Add helper functions for restore routine

2018-03-13T08:47:55+00:00

Add common (host/device) helper functions, which will be called while exiting from hibernation, from both sides. dwc2_restore_essential_regs() dwc2_hib_restore_common() Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Artur Petrosyan Signed-off-by: Minas Harutyunyan Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Changes in registers backup/restore functions

2018-03-13T08:47:55+00:00

Move hptxfsiz to host register's backup/restore functions, not needed to have it in global register's backup/restore functions. Add backup for glpmcfg, and read/write for gi2cctl and pcgcctl. As requires programming guide. Affected functions: dwc2_backup_host_registers() dwc2_restore_host_registers() dwc2_backup_global_registers() dwc2_restore_global_registers() Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: gadget: Fix dwc2_restore_device_registers

2018-03-13T08:47:54+00:00

Add parameter remote_wakeup to dwc2_restore_device_registers() to be able to restore device registers according to programming guide for dwc-otg. It says that in case of rem_wakeup DCTL must not be restored here. Remove setting of DCTL_PWRONPRGDONE from this function, because it will be done in function responsible for exiting from hibernation. WA for enabled EPx's IN and OUT in DDMA mode. On entering to hibernation wrong value read and saved from DIEPDMAx, as result BNA interrupt asserted on hibernation exit by restoring from saved area. Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Artur Petrosyan Signed-off-by: Minas Harutyunyan Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: gadget: Moved dtxfsiz backup array place

2018-03-13T08:47:54+00:00

Moved dtxfsiz from dwc2_gregs_backup to dwc2_dregs_backup, because it is device register. Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi

usb: dwc2: Add hibernation field into dwc2_hw_params

2018-03-13T08:47:53+00:00

Add parameter and it's initialization, needed for hibernation. Reimplement dwc2_set_param_power_down() to support hibernation too. Now 'power_down' parameter can be initialized with 0, 1 or 2. 0 - No 1 - Partial power down 2 - Hibernation Signed-off-by: Vardan Mikayelyan Signed-off-by: John Youn Signed-off-by: Grigor Tovmasyan Signed-off-by: Felipe Balbi