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