kernel.git/drivers/usb/chipidea/core.c, branch linux-4.19.y

usb: chipidea: wait controller resume finished for wakeup irq

2024-01-25T22:33:37Z

commit 128d849074d05545becf86e713715ce7676fc074 upstream. After the chipidea driver introduce extcon for id and vbus, it's able to wakeup from another irq source, in case the system with extcon ID cable, wakeup from usb ID cable and device removal, the usb device disconnect irq may come firstly before the extcon notifier while system resume, so we will get 2 "wakeup" irq, one for usb device disconnect; and one for extcon ID cable change(real wakeup event), current driver treat them as 2 successive wakeup irq so can't handle it correctly, then finally the usb irq can't be enabled. This patch adds a check to bypass further usb events before controller resume finished to fix it. Fixes: 1f874edcb731 ("usb: chipidea: add runtime power management support") cc: Acked-by: Peter Chen Signed-off-by: Xu Yang Signed-off-by: Li Jun Link: https://lore.kernel.org/r/20231228110753.1755756-2-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman

usb: chipidea: fix missing goto in `ci_hdrc_probe`

2023-05-17T09:13:17Z

[ Upstream commit d6f712f53b79f5017cdcefafb7a5aea9ec52da5d ] From the comment of ci_usb_phy_init, it returns an error code if usb_phy_init has failed, and it should do some clean up, not just return directly. Fix this by goto the error handling. Fixes: 74475ede784d ("usb: chipidea: move PHY operation to core") Reviewed-by: Dongliang Mu Acked-by: Peter Chen Signed-off-by: Yinhao Hu Link: https://lore.kernel.org/r/20230412055852.971991-1-dddddd@hust.edu.cn Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

usb: chipidea: core: fix possible concurrent when switch role

2023-04-05T09:15:37Z

commit 451b15ed138ec15bffbebb58a00ebdd884c3e659 upstream. The user may call role_store() when driver is handling ci_handle_id_switch() which is triggerred by otg event or power lost event. Unfortunately, the controller may go into chaos in this case. Fix this by protecting it with mutex lock. Fixes: a932a8041ff9 ("usb: chipidea: core: add sysfs group") cc: Acked-by: Peter Chen Signed-off-by: Xu Yang Link: https://lore.kernel.org/r/20230317061516.2451728-2-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman

usb: chipdea: core: fix return -EINVAL if request role is the same with current role

2023-04-05T09:15:37Z

commit 3670de80678961eda7fa2220883fc77c16868951 upstream. It should not return -EINVAL if the request role is the same with current role, return non-error and without do anything instead. Fixes: a932a8041ff9 ("usb: chipidea: core: add sysfs group") cc: Acked-by: Peter Chen Signed-off-by: Xu Yang Link: https://lore.kernel.org/r/20230317061516.2451728-1-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman

USB: chipidea: fix interrupt deadlock

2021-11-26T10:36:16Z

commit 9aaa81c3366e8393a62374e3a1c67c69edc07b8a upstream. Chipidea core was calling the interrupt handler from non-IRQ context with interrupts enabled, something which can lead to a deadlock if there's an actual interrupt trying to take a lock that's already held (e.g. the controller lock in udc_irq()). Add a wrapper that can be used to fake interrupts instead of calling the handler directly. Fixes: 3ecb3e09b042 ("usb: chipidea: Use extcon framework for VBUS and ID detect") Fixes: 876d4e1e8298 ("usb: chipidea: core: add wakeup support for extcon") Cc: Peter Chen Cc: stable@vger.kernel.org # 4.4 Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20211021083447.20078-1-johan@kernel.org Signed-off-by: Greg Kroah-Hartman

usb: chipidea: core: add wakeup support for extcon

2020-07-22T07:32:09Z

commit 876d4e1e8298ad1f94d9e9392fc90486755437b4 upstream. If wakeup event occurred by extcon event, it needs to call ci_irq again since the first ci_irq calling at extcon notifier only wakes up controller, but do noop for event handling, it causes the extcon use case can't work well from low power mode. Cc: Fixes: 3ecb3e09b042 ("usb: chipidea: Use extcon framework for VBUS and ID detect") Reported-by: Philippe Schenker Tested-by: Philippe Schenker Signed-off-by: Peter Chen Link: https://lore.kernel.org/r/20200707060601.31907-2-peter.chen@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman

usb: chipidea: Grab the (legacy) USB PHY by phandle first

2019-04-05T20:33:01Z

[ Upstream commit 68ef236274793066b9ba3154b16c0acc1c891e5c ] According to the chipidea driver bindings, the USB PHY is specified via the "phys" phandle node. However, this only takes effect for USB PHYs that use the common PHY framework. For legacy USB PHYs, a simple lookup based on the USB PHY type is done instead. This does not play out well when more than one USB PHY is registered, since the first registered PHY matching the type will always be returned regardless of what the driver was bound to. Fix this by looking up the PHY based on the "phys" phandle node. Although generic PHYs are rather matched by their "phys-name" and not the "phys" phandle directly, there is no helper for similar lookup on legacy PHYs and it's probably not worth the effort to add it. When no legacy USB PHY is found by phandle, fallback to grabbing any registered USB2 PHY. This ensures backward compatibility if some users were actually relying on this mechanism. Signed-off-by: Paul Kocialkowski Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

USB: chipidea: no need to check return value of debugfs_create functions

2018-05-31T10:54:22Z

When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Acked-by: Peter Chen Signed-off-by: Greg Kroah-Hartman

USB: move many drivers to use DEVICE_ATTR_RW

2018-01-24T07:49:51Z

Instead of "open coding" a DEVICE_ATTR() define, use the DEVICE_ATTR_RW() macro instead, which does everything properly instead. This does require a few static functions to be renamed to work properly, but thanks to a script from Joe Perches, this was easily done. Reported-by: Joe Perches Cc: Matthieu CASTET Cc: Stanislaw Gruszka Cc: Peter Chen Cc: Mathias Nyman Acked-by: Felipe Balbi Acked-by: Alan Stern Acked-by: Bin Liu Signed-off-by: Greg Kroah-Hartman

USB: chipidea: Remove redundant license text

2017-11-07T14:45:01Z

Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Thierry Reding Cc: Jonathan Hunter Acked-by: Peter Chen Signed-off-by: Greg Kroah-Hartman