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950-0430-usb-dwc_otg-Clean-up-interrupt-claiming-code.patch
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950-0430-usb-dwc_otg-Clean-up-interrupt-claiming-code.patch
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From efb54d0f0445f3d279a7eae7395b566c96d080de Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 7 May 2019 17:23:41 +0100
Subject: [PATCH] usb: dwc_otg: Clean up interrupt claiming code
The FIQ/IRQ interrupt number identification code is scattered through
the dwc_otg driver. Rationalise it, simplifying the code and solving
an existing issue.
See: https://github.com/raspberrypi/linux/issues/2612
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
drivers/usb/host/dwc_otg/dwc_otg_driver.c | 18 +++++++++-----
drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 10 +++-----
drivers/usb/host/dwc_otg/dwc_otg_os_dep.h | 6 +++++
drivers/usb/host/dwc_otg/dwc_otg_pcd_linux.c | 26 +++-----------------
4 files changed, 25 insertions(+), 35 deletions(-)
--- a/drivers/usb/host/dwc_otg/dwc_otg_driver.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_driver.c
@@ -624,11 +624,7 @@ static int dwc_otg_driver_remove(
* Free the IRQ
*/
if (otg_dev->common_irq_installed) {
-#ifdef PLATFORM_INTERFACE
- free_irq(platform_get_irq(_dev, 0), otg_dev);
-#else
- free_irq(_dev->irq, otg_dev);
-#endif
+ free_irq(otg_dev->os_dep.irq_num, otg_dev);
} else {
DWC_DEBUGPL(DBG_ANY, "%s: There is no installed irq!\n", __func__);
return REM_RETVAL(-ENXIO);
@@ -905,7 +901,9 @@ static int dwc_otg_driver_probe(
*/
#if defined(PLATFORM_INTERFACE)
- devirq = platform_get_irq(_dev, fiq_enable ? 0 : 1);
+ devirq = platform_get_irq_byname(_dev, fiq_enable ? "soft" : "usb");
+ if (devirq < 0)
+ devirq = platform_get_irq(_dev, fiq_enable ? 0 : 1);
#else
devirq = _dev->irq;
#endif
@@ -922,6 +920,14 @@ static int dwc_otg_driver_probe(
} else {
dwc_otg_device->common_irq_installed = 1;
}
+ dwc_otg_device->os_dep.irq_num = devirq;
+ dwc_otg_device->os_dep.fiq_num = -EINVAL;
+ if (fiq_enable) {
+ int devfiq = platform_get_irq_byname(_dev, "usb");
+ if (devfiq < 0)
+ devfiq = platform_get_irq(_dev, 1);
+ dwc_otg_device->os_dep.fiq_num = devfiq;
+ }
#ifndef IRQF_TRIGGER_LOW
#if defined(LM_INTERFACE) || defined(PLATFORM_INTERFACE)
--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
@@ -492,7 +492,7 @@ static void hcd_init_fiq(void *cookie)
#endif
// Enable FIQ interrupt from USB peripheral
#ifdef CONFIG_ARM64
- irq = platform_get_irq(otg_dev->os_dep.platformdev, 1);
+ irq = otg_dev->os_dep.fiq_num;
if (irq < 0) {
DWC_ERROR("Can't get SIM-FIQ irq");
@@ -509,7 +509,7 @@ static void hcd_init_fiq(void *cookie)
simfiq_irq = irq;
#else
#ifdef CONFIG_GENERIC_IRQ_MULTI_HANDLER
- irq = platform_get_irq(otg_dev->os_dep.platformdev, 1);
+ irq = otg_dev->os_dep.fiq_num;
#else
irq = INTERRUPT_VC_USB;
#endif
@@ -626,11 +626,7 @@ int hcd_init(dwc_bus_dev_t *_dev)
* allocates the DMA buffer pool, registers the USB bus, requests the
* IRQ line, and calls hcd_start method.
*/
-#ifdef PLATFORM_INTERFACE
- retval = usb_add_hcd(hcd, platform_get_irq(_dev, fiq_enable ? 0 : 1), IRQF_SHARED);
-#else
- retval = usb_add_hcd(hcd, _dev->irq, IRQF_SHARED);
-#endif
+ retval = usb_add_hcd(hcd, otg_dev->os_dep.irq_num, IRQF_SHARED);
if (retval < 0) {
goto error2;
}
--- a/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
+++ b/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
@@ -102,6 +102,12 @@ typedef struct os_dependent {
/** Base address for MPHI peripheral */
void *mphi_base;
+ /** IRQ number (<0 if not valid) */
+ int irq_num;
+
+ /** FIQ number (<0 if not valid) */
+ int fiq_num;
+
#ifdef LM_INTERFACE
struct lm_device *lmdev;
#elif defined(PCI_INTERFACE)
--- a/drivers/usb/host/dwc_otg/dwc_otg_pcd_linux.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_pcd_linux.c
@@ -1224,30 +1224,16 @@ int pcd_init(dwc_bus_dev_t *_dev)
/*
* Setup interupt handler
*/
-#ifdef PLATFORM_INTERFACE
DWC_DEBUGPL(DBG_ANY, "registering handler for irq%d\n",
- platform_get_irq(_dev, fiq_enable ? 0 : 1));
- retval = request_irq(platform_get_irq(_dev, fiq_enable ? 0 : 1), dwc_otg_pcd_irq,
+ otg_dev->os_dep.irq_num);
+ retval = request_irq(otg_dev->os_dep.irq_num, dwc_otg_pcd_irq,
IRQF_SHARED, gadget_wrapper->gadget.name,
otg_dev->pcd);
if (retval != 0) {
- DWC_ERROR("request of irq%d failed\n",
- platform_get_irq(_dev, fiq_enable ? 0 : 1));
+ DWC_ERROR("request of irq%d failed\n", otg_dev->os_dep.irq_num);
free_wrapper(gadget_wrapper);
return -EBUSY;
}
-#else
- DWC_DEBUGPL(DBG_ANY, "registering handler for irq%d\n",
- _dev->irq);
- retval = request_irq(_dev->irq, dwc_otg_pcd_irq,
- IRQF_SHARED | IRQF_DISABLED,
- gadget_wrapper->gadget.name, otg_dev->pcd);
- if (retval != 0) {
- DWC_ERROR("request of irq%d failed\n", _dev->irq);
- free_wrapper(gadget_wrapper);
- return -EBUSY;
- }
-#endif
dwc_otg_pcd_start(gadget_wrapper->pcd, &fops);
@@ -1267,11 +1253,7 @@ void pcd_remove(dwc_bus_dev_t *_dev)
/*
* Free the IRQ
*/
-#ifdef PLATFORM_INTERFACE
- free_irq(platform_get_irq(_dev, 0), pcd);
-#else
- free_irq(_dev->irq, pcd);
-#endif
+ free_irq(otg_dev->os_dep.irq_num, pcd);
dwc_otg_pcd_remove(otg_dev->pcd);
free_wrapper(gadget_wrapper);
otg_dev->pcd = 0;