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path: root/drivers/usb/cdns3/drd.c
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* usb: cdns3: Fix spelling mistake "supporte" -> "supported"Colin Ian King2024-03-021-1/+1
| | | | | | | | There is a spelling mistake in a dev_err message. Fix it. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Link: https://lore.kernel.org/r/20240220080617.2674613-1-colin.i.king@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: cdnsp: fixed issue with incorrect detecting CDNSP family controllersPawel Laszczak2024-02-191-4/+9
| | | | | | | | | | | | | | Cadence have several controllers from 0x000403xx family but current driver suuport detecting only one with DID equal 0x0004034E. It causes that if someone uses different CDNSP controller then driver will use incorrect version and register space. Patch fix this issue. cc: stable@vger.kernel.org Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") Signed-off-by: Pawel Laszczak <pawell@cadence.com> Link: https://lore.kernel.org/r/20240215121609.259772-1-pawell@cadence.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: cdns3: Add PHY mode switch to usb2 PHYMinda Chen2023-07-251-0/+4
| | | | | | | | | | | | cdns3 just set PHY mode switch for USB3.0 PHY. If USB 2.0 PHY contains PHY mode switch setting, USB 2.0 PHY mode function can't be called. So add PHY mode switch function for USB 2.0 PHY. Signed-off-by: Minda Chen <minda.chen@starfivetech.com> Reviewed-by: Roger Quadros <rogerq@kernel.org> Link: https://lore.kernel.org/r/20230721095923.20445-1-minda.chen@starfivetech.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: cdnsp: Fix segmentation fault in cdns_lost_power functionPawel Laszczak2022-01-261-3/+3
| | | | | | | | | | | CDNSP driver read not initialized cdns->otg_v0_regs which lead to segmentation fault. Patch fixes this issue. Fixes: 2cf2581cd229 ("usb: cdns3: add power lost support for system resume") cc: <stable@vger.kernel.org> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Link: https://lore.kernel.org/r/20220111090737.10345-1-pawell@gli-login.cadence.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: cdns3: add power lost support for system resumeFrank Li2021-04-121-0/+15
| | | | | | | | | If the controller lost its power during the system suspend, we need to do all initialiation operations. Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Frank Li <frank.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
* usb: cdns3: Adds missing __iomem markersPawel Laszczak2021-01-141-6/+6
| | | | | | | | | | | | | Patch adds missing __iomem markers in core.h file and makes some changes in drd.c file related with these markers. The lack of __iomem has reported by sparse checker on parsic architecture. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Peter Chen <peter.chen@kernel.org>
* usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD DriverPawel Laszczak2020-12-291-1/+28
| | | | | | | | | | | | | | | | | | | | | | This patch introduces the main part of Cadence USBSSP DRD driver to Linux kernel. To reduce the patch size a little bit, the header file gadget.h was intentionally added as separate patch. The Cadence USBSSP DRD Controller is a highly configurable IP Core which can be instantiated as Dual-Role Device (DRD), Peripheral Only and Host Only (XHCI)configurations. The current driver has been validated with FPGA platform. We have support for PCIe bus, which is used on FPGA prototyping. The host side of USBSS DRD controller is compliant with XHCI. The architecture for device side is almost the same as for host side, and most of the XHCI specification can be used to understand how this controller operates. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
* usb: cdns3: Refactoring names in reusable codePawel Laszczak2020-12-291-50/+50
| | | | | | | | | | | | | | | | | | | | Patch change the functions and objects names in reusable code. The reusable code includes core.c, core.h, drd.c and drd.h files. It also changes the names of all references to these functions and objects in other cdns3 files. There are a lot of changes, but all changes are very trivial. The reason of this patch is to avoid of mixing prefix cdns3 and cdnsp in in cdnsp driver what could introduce some confusion in understanding of cdnsp driver. This patch assumes to use three different prefixes in Cadence USB drivers: cdns: for common reusable code cdnsp: for names related only with cdnsp driver cdns3: for names related only with cdns3 driver Signed-off-by: Pawel Laszczak <pawell@cadence.com> Tested-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
* usb: cdns3: Moves reusable code to separate modulePawel Laszczak2020-12-291-1/+2
| | | | | | | | | | Patch moves common reusable code used by cdns3 and cdnsp driver to cdns-usb-common library. This library include core.c, drd.c and host.c files. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Tested-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
* usb: cdns3: Split core.c into cdns3-plat and core.c filePawel Laszczak2020-12-291-1/+0
| | | | | | | | | | | Patch splits file core.c into core.c containing the common reusable code and cnd3-plat.c containing device platform specific code. These changes are required to make possible reuse DRD part of CDNS3 driver in CDNSP driver. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Tested-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
* usb: cdns3: Add support for DRD CDNSPPawel Laszczak2020-12-291-30/+71
| | | | | | | | | | | | Patch adds support for Cadence DRD Super Speed Plus controller(CDNSP). CDNSP DRD is a part of Cadence CDNSP controller. The DRD CDNSP controller has a lot of difference on hardware level but on software level is quite compatible with CDNS3 DRD. For this reason CDNS3 DRD part of CDNS3 driver was reused for CDNSP driver. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Tested-by: Aswath Govindraju <a-govindraju@ti.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
* usb: cdns3: drd: call PHY .set_mode accordinglyPeter Chen2020-10-021-0/+5
| | | | | | | Some PHYs may need to enter related mode, and do some settings. Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: Enable workaround for USB2.0 PHY Rx compliance test PHY lockupPawel Laszczak2020-10-021-0/+12
| | | | | | | | | | | | | | | | | | | | USB2.0 PHY hangs in Rx Compliance test when the incoming packet amplitude is varied below and above the Squelch Level of Receiver during the active packet multiple times. Version 1 of the controller allows PHY to be reset when RX fail condition is detected to work around the above issue. This feature is disabled by default and needs to be enabled using a bit from the newly added PHYRST_CFG register. This patch enables the workaround. There is no way to know controller version before device controller is started and the workaround needs to be applied for both host and device modes, so we rely on a DT property do decide when to apply the workaround. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: add runtime PM supportPeter Chen2020-10-021-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce runtime PM and wakeup interrupt handler for cdns3, the runtime PM is default off since other cdns3 may not implement glue layer support for runtime PM. One typical wakeup event use case is xHCI runtime suspend will clear USBCMD.RS bit, after that the xHCI will not trigger any interrupts, so its parent (cdns core device) needs to resume xHCI device when any (wakeup) events occurs at host port. When the controller is in low power mode, the lpm flag will be set. The interrupt triggered later than lpm flag is set considers as wakeup interrupt and handled at cdns_wakeup_irq. Once the wakeup occurs, it first disables interrupt to avoid later interrupt occurrence since the controller is in low power mode at that time, and access registers may be invalid at that time. At wakeup handler, it will call pm_request_resume to wakeup xHCI device, and at runtime resume handler, it will enable interrupt again. The API platform_suspend is introduced for glue layer to implement platform specific PM sequence. Reviewed-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: drd: simplify *switch_gadet and *switch_hostPawel Laszczak2020-07-241-56/+68
| | | | | | | | | | | | | | | | Patch split function cdns3_drd_switch_gadget and cdns3_drd_switch_host into: - cdns3_drd_host_on - cdns3_drd_host_off - cdns3_drd_gadget_on - cdns3_drd_gadgett_off These functions don't have any shared code so it's better to have smaller, faster and easier functions. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: Added CDNS3_ID_PERIPHERAL and CDNS3_ID_HOSTPawel Laszczak2020-07-241-2/+2
| | | | | | | | Patch adds 2 definitions that make it easier to understand the code. Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: drd: changed return type from int to boolPawel Laszczak2020-07-241-8/+8
| | | | | | | | | Patch changes return type from int to bool for cdns3_is_host and cdns3_is_device functions. Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: drd: return IRQ_NONE explicitly.Pawel Laszczak2020-07-241-2/+2
| | | | | | | | IRQ_NONE can be returned indirect. Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cnds3: drd: deleted !=Pawel Laszczak2020-07-241-1/+1
| | | | | | | | | Patch deletes unnecessary != from condition statement in cdns3_drd_init function. Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: drd: removed not needed variables initializationPawel Laszczak2020-07-241-10/+9
| | | | | | | | | Patch remove some variables initialization from core.c and drd.c file. Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
* usb: cdns3: change dev_info to dev_dbg for debug messagePeter Chen2020-04-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | During device mode initialization, lots of device information are printed to console, see below. Change them as debug message. cdns-usb3 5b130000.cdns3: Initialized ep0 support: cdns-usb3 5b130000.cdns3: Initialized ep1out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep2out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep3out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep4out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep5out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep6out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep7out support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep1in support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep2in support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep3in support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep4in support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep5in support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep6in support: BULK, INT ISO cdns-usb3 5b130000.cdns3: Initialized ep7in support: BULK, INT ISO Signed-off-by: Peter Chen <peter.chen@nxp.com> Reviewed-by: Roger Quadros <rogerq@ti.com> Link: https://lore.kernel.org/r/20200331081005.32752-4-peter.chen@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: cdns3: Add Cadence USB3 DRD DriverPawel Laszczak2019-08-291-0/+381
This patch introduce new Cadence USBSS DRD driver to Linux kernel. The Cadence USBSS DRD Controller is a highly configurable IP Core which can be instantiated as Dual-Role Device (DRD), Peripheral Only and Host Only (XHCI)configurations. The current driver has been validated with FPGA platform. We have support for PCIe bus, which is used on FPGA prototyping. The host side of USBSS-DRD controller is compliant with XHCI specification, so it works with standard XHCI Linux driver. Signed-off-by: Pawel Laszczak <pawell@cadence.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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