From 0f2d776199ec3ae80623fdc5978d5a1ef3accb49 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Tue, 31 Mar 2020 16:10:02 +0800 Subject: usb: cdns3: core: get role switch node from firmware After that, the role switch device (eg, Type-C device) could call cdns3_role_set to finish the role switch. Signed-off-by: Peter Chen Reviewed-by: Roger Quadros Link: https://lore.kernel.org/r/20200331081005.32752-1-peter.chen@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/cdns3/core.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb/cdns3/core.c') diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index 4aafba20f450..704c679a0c5d 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -528,6 +528,8 @@ static int cdns3_probe(struct platform_device *pdev) sw_desc.get = cdns3_role_get; sw_desc.allow_userspace_control = true; sw_desc.driver_data = cdns; + if (device_property_read_bool(dev, "usb-role-switch")) + sw_desc.fwnode = dev->fwnode; cdns->role_sw = usb_role_switch_register(dev, &sw_desc); if (IS_ERR(cdns->role_sw)) { -- cgit From 85820de1b6109ffcfc4c5e9bb27e31f130725223 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Tue, 31 Mar 2020 16:10:03 +0800 Subject: usb: cdns3: delete role_override In short, we have three kinds of role switches: - Based on SoC: ID and VBUS - Based on external connnctor, eg, Type-C or GPIO Connector - Based on user choices through sysfs Since HW handling and usb-role-switch handling are at different places, we do not need role_override any more, and this flag could not judge external connector case well. With role_override deleted, We use cdns3_hw_role_switch for the 1st use case, and usb-role-switch for the 2nd and 3rd cases. Signed-off-by: Peter Chen Reviewed-by: Roger Quadros Link: https://lore.kernel.org/r/20200331081005.32752-2-peter.chen@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/cdns3/core.c | 37 ------------------------------------- drivers/usb/cdns3/core.h | 2 -- 2 files changed, 39 deletions(-) (limited to 'drivers/usb/cdns3/core.c') diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index 704c679a0c5d..f57c66a9f87c 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -291,10 +291,6 @@ int cdns3_hw_role_switch(struct cdns3 *cdns) enum usb_role real_role, current_role; int ret = 0; - /* Do nothing if role based on syfs. */ - if (cdns->role_override) - return 0; - pm_runtime_get_sync(cdns->dev); current_role = cdns->role; @@ -353,39 +349,6 @@ static int cdns3_role_set(struct usb_role_switch *sw, enum usb_role role) pm_runtime_get_sync(cdns->dev); - /* - * FIXME: switch role framework should be extended to meet - * requirements. Driver assumes that role can be controlled - * by SW or HW. Temporary workaround is to use USB_ROLE_NONE to - * switch from SW to HW control. - * - * For dr_mode == USB_DR_MODE_OTG: - * if user sets USB_ROLE_HOST or USB_ROLE_DEVICE then driver - * sets role_override flag and forces that role. - * if user sets USB_ROLE_NONE, driver clears role_override and lets - * HW state machine take over. - * - * For dr_mode != USB_DR_MODE_OTG: - * Assumptions: - * 1. Restricted user control between NONE and dr_mode. - * 2. Driver doesn't need to rely on role_override flag. - * 3. Driver needs to ensure that HW state machine is never called - * if dr_mode != USB_DR_MODE_OTG. - */ - if (role == USB_ROLE_NONE) - cdns->role_override = 0; - else - cdns->role_override = 1; - - /* - * HW state might have changed so driver need to trigger - * HW state machine if dr_mode == USB_DR_MODE_OTG. - */ - if (!cdns->role_override && cdns->dr_mode == USB_DR_MODE_OTG) { - cdns3_hw_role_switch(cdns); - goto pm_put; - } - if (cdns->role == role) goto pm_put; diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h index 969eb94de204..1ad1f1fe61e9 100644 --- a/drivers/usb/cdns3/core.h +++ b/drivers/usb/cdns3/core.h @@ -62,7 +62,6 @@ struct cdns3_role_driver { * This field based on firmware setting, kernel configuration * and hardware configuration. * @role_sw: pointer to role switch object. - * @role_override: set 1 if role rely on SW. */ struct cdns3 { struct device *dev; @@ -90,7 +89,6 @@ struct cdns3 { struct mutex mutex; enum usb_dr_mode dr_mode; struct usb_role_switch *role_sw; - int role_override; }; int cdns3_hw_role_switch(struct cdns3 *cdns); -- cgit From 0c7299d68736034ae4f1b166cf16d62a5ae0abb2 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Tue, 31 Mar 2020 16:10:04 +0800 Subject: usb: cdns3: change "cdsn3" to"cdns3" And delete cdsn3_hw_role_state_machine declare which doesn't be needed. Signed-off-by: Peter Chen Reviewed-by: Roger Quadros Link: https://lore.kernel.org/r/20200331081005.32752-3-peter.chen@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/cdns3/core.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/usb/cdns3/core.c') diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index f57c66a9f87c..19bbb5b7e6b6 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -82,8 +82,6 @@ static void cdns3_exit_roles(struct cdns3 *cdns) cdns3_drd_exit(cdns); } -static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns); - /** * cdns3_core_init_role - initialize role of operation * @cdns: Pointer to cdns3 structure @@ -193,12 +191,12 @@ err: } /** - * cdsn3_hw_role_state_machine - role switch state machine based on hw events. + * cdns3_hw_role_state_machine - role switch state machine based on hw events. * @cdns: Pointer to controller structure. * * Returns next role to be entered based on hw events. */ -static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns) +static enum usb_role cdns3_hw_role_state_machine(struct cdns3 *cdns) { enum usb_role role; int id, vbus; @@ -294,7 +292,7 @@ int cdns3_hw_role_switch(struct cdns3 *cdns) pm_runtime_get_sync(cdns->dev); current_role = cdns->role; - real_role = cdsn3_hw_role_state_machine(cdns); + real_role = cdns3_hw_role_state_machine(cdns); /* Do nothing if nothing changed */ if (current_role == real_role) -- cgit