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linux/drivers/usb/chipidea/otg.h

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USB: add SPDX identifiers to all remaining files in drivers/usb/ It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-03 18:28:30 +08:00
// SPDX-License-Identifier: GPL-2.0
usb: chipidea: otg: add otg file used to access otgsc This file is mainly used to access otgsc currently, it may add otg related things in the future. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14 17:44:06 +08:00
/*
usb: chipidea: need to mask INT_STATUS when write otgsc For otgsc, both enable bits and status bits are in it. So we need to make sure the status bits are not be cleared when write enable bits. It can fix one bug that we plug in/out Micro AB cable fast, and sometimes, the IDIS will be cleared wrongly when handle last ID interrupt (ID 0->1), so the current interrupt will not occur. For stable tree: 3.12+ Cc: stable@vger.kernel.org Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-10 13:51:31 +08:00
* Copyright (C) 2013-2014 Freescale Semiconductor, Inc.
usb: chipidea: otg: add otg file used to access otgsc This file is mainly used to access otgsc currently, it may add otg related things in the future. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14 17:44:06 +08:00
*
* Author: Peter Chen
*/
#ifndef __DRIVERS_USB_CHIPIDEA_OTG_H
#define __DRIVERS_USB_CHIPIDEA_OTG_H
usb: chipidea: operate on otgsc register in a general way Use a more general way to read and write otgsc register. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Li Jun <b47624@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-23 15:56:38 +08:00
u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask);
void hw_write_otgsc(struct ci_hdrc *ci, u32 mask, u32 data);
usb: chipidea: otg: add otg file used to access otgsc This file is mainly used to access otgsc currently, it may add otg related things in the future. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14 17:44:06 +08:00
int ci_hdrc_otg_init(struct ci_hdrc *ci);
usb: chipidea: move otg related things to otg file Move otg related things to otg file. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14 17:44:10 +08:00
void ci_hdrc_otg_destroy(struct ci_hdrc *ci);
enum ci_role ci_otg_role(struct ci_hdrc *ci);
usb: chipidea: add vbus interrupt handler We add vbus interrupt handler at ci_otg_work, it uses OTGSC_BSV(at otgsc) to know it is connect or disconnet event. Meanwhile, we introduce two flags id_event and b_sess_valid_event to indicate it is an id interrupt or a vbus interrupt. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14 17:44:11 +08:00
void ci_handle_vbus_change(struct ci_hdrc *ci);
usb: chipidea: using one inline function to cover queue work operations The otg queue work include operations: one is disable interrupt, another one is call kernel queue work API. Many codes do this operation, using one inline function to instead of them. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-23 08:12:49 +08:00
static inline void ci_otg_queue_work(struct ci_hdrc *ci)
{
disable_irq_nosync(ci->irq);
usb: chipidea: Prevent unbalanced IRQ disable The ChipIdea IRQ is disabled before scheduling the otg work and re-enabled on otg work completion. However if the job is already scheduled we have to undo the effect of disable_irq int order to balance the IRQ disable-depth value. Fixes: be6b0c1bd0be ("usb: chipidea: using one inline function to cover queue work operations") Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: Peter Chen <peter.chen@nxp.com>
2018-09-04 23:18:57 +08:00
if (queue_work(ci->wq, &ci->work) == false)
enable_irq(ci->irq);
usb: chipidea: using one inline function to cover queue work operations The otg queue work include operations: one is disable interrupt, another one is call kernel queue work API. Many codes do this operation, using one inline function to instead of them. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-23 08:12:49 +08:00
}
usb: chipidea: otg: add otg file used to access otgsc This file is mainly used to access otgsc currently, it may add otg related things in the future. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14 17:44:06 +08:00
#endif /* __DRIVERS_USB_CHIPIDEA_OTG_H */