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Date: Fri, 31 Oct 2014 10:00:09 -0500
From: Dinh Nguyen <dinguyen@...nsource.altera.com>
To: <balbi@...com>
CC: <paulz@...opsys.com>, <dinh.linux@...il.com>,
<swarren@...dotorg.org>, <b.zolnierkie@...sung.com>,
<matthijs@...in.nl>, <r.baldyga@...sung.com>,
<jg1.han@...sung.com>, <sachin.kamat@...aro.org>,
<ben-linux@...ff.org>, <dianders@...omium.org>,
<kever.yang@...k-chips.com>, <linux-usb@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv6 4/8] usb: dwc2: Update common interrupt handler to call
gadget interrupt handler
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On 10/30/2014 09:00 AM, Felipe Balbi wrote:
> Hi,
>
> On Tue, Oct 28, 2014 at 06:25:45PM -0500,
> dinguyen@...nsource.altera.com wrote:
>> From: Dinh Nguyen <dinguyen@...nsource.altera.com>
>>
>> Make dwc2_handle_common_intr call the gadget interrupt function
>> when operating in peripheral mode. Remove the spinlock functions
>> in s3c_hsotg_irq as dwc2_handle_common_intr() already has the
>> spinlocks.
>>
>> Move the registeration of the IRQ to common code for platform and
>> PCI.
>>
>> Remove duplicate interrupt conditions that was in gadget, as
>> those are handled by dwc2 common interrupt handler.
>>
>> Signed-off-by: Dinh Nguyen <dinguyen@...nsource.altera.com>
>> Acked-by: Paul Zimmerman <paulz@...opsys.com> --- v5: remove
>> individual devm_request_irq from gadget and hcd, and place a
>> single devm_request_irq in platform and pci. v2: Keep interrupt
>> handler for host and peripheral modes separate ---
>> drivers/usb/dwc2/core.c | 10 --------
>> drivers/usb/dwc2/core.h | 3 +++
>> drivers/usb/dwc2/core_intr.c | 3 +++ drivers/usb/dwc2/gadget.c
>> | 57 ++------------------------------------------
>> drivers/usb/dwc2/pci.c | 6 +++++
>> drivers/usb/dwc2/platform.c | 9 +++++++ 6 files changed, 23
>> insertions(+), 65 deletions(-)
>>
>> diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
>> index d926945..7605850b 100644 --- a/drivers/usb/dwc2/core.c +++
>> b/drivers/usb/dwc2/core.c @@ -458,16 +458,6 @@ int
>> dwc2_core_init(struct dwc2_hsotg *hsotg, bool select_phy, int
>> irq) /* Clear the SRP success bit for FS-I2c */
>> hsotg->srp_success = 0;
>>
>> - if (irq >= 0) { - dev_dbg(hsotg->dev, "registering common
>> handler for irq%d\n", - irq); - retval =
>> devm_request_irq(hsotg->dev, irq, -
>> dwc2_handle_common_intr, IRQF_SHARED, -
>> dev_name(hsotg->dev), hsotg); - if (retval) - return retval; -
>> } - /* Enable common interrupts */
>> dwc2_enable_common_interrupts(hsotg);
>>
>> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
>> index 80d29c7..ec70862 100644 --- a/drivers/usb/dwc2/core.h +++
>> b/drivers/usb/dwc2/core.h @@ -967,6 +967,7 @@ extern int
>> s3c_hsotg_suspend(struct dwc2_hsotg *dwc2); extern int
>> s3c_hsotg_resume(struct dwc2_hsotg *dwc2); extern int
>> dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq); extern void
>> s3c_hsotg_core_init(struct dwc2_hsotg *dwc2); +irqreturn_t
>> s3c_hsotg_irq(int irq, void *pw); #else static inline int
>> s3c_hsotg_remove(struct dwc2_hsotg *dwc2) { return 0; } @@ -977,6
>> +978,8 @@ static inline int s3c_hsotg_resume(struct dwc2_hsotg
>> *dwc2) static inline int dwc2_gadget_init(struct dwc2_hsotg
>> *hsotg, int irq) { return 0; } static inline void
>> s3c_hsotg_core_init(struct dwc2_hsotg *dwc2) {} +static inline
>> irqreturn_t s3c_hsotg_irq(int irq, void *pw) +{ return
>> IRQ_HANDLED; } #endif
>>
>> #if IS_ENABLED(CONFIG_USB_DWC2_HOST) ||
>> IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) diff --git
>> a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
>> index b176c2f..b0c14e0 100644 --- a/drivers/usb/dwc2/core_intr.c
>> +++ b/drivers/usb/dwc2/core_intr.c @@ -474,6 +474,9 @@
>> irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
>>
>> spin_lock(&hsotg->lock);
>>
>> + if (dwc2_is_device_mode(hsotg)) + retval = s3c_hsotg_irq(irq,
>> dev); + gintsts = dwc2_read_common_intr(hsotg); if (gintsts &
>> ~GINTSTS_PRTINT) retval = IRQ_HANDLED; diff --git
>> a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index
>> 19d1b03..202f8cc 100644 --- a/drivers/usb/dwc2/gadget.c +++
>> b/drivers/usb/dwc2/gadget.c @@ -2257,14 +2257,13 @@ void
>> s3c_hsotg_core_init(struct dwc2_hsotg *hsotg) * @irq: The IRQ
>> number triggered * @pw: The pw value when registered the
>> handler. */ -static irqreturn_t s3c_hsotg_irq(int irq, void *pw)
>> +irqreturn_t s3c_hsotg_irq(int irq, void *pw)
>
> why ? It would've been a lot easier to just make the IRQ line
> shared.
>
Reworked to use IRQF_SHARED...
Thanks,
Dinh
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