89 lines
3.2 KiB
Diff
89 lines
3.2 KiB
Diff
From 2d5ba37461013253d2ff0a3641b727fd32ea97a9 Mon Sep 17 00:00:00 2001
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From: Florian Fainelli <florian@openwrt.org>
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Date: Tue, 23 Feb 2021 18:44:53 +0100
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Subject: [PATCH 1/3] usb: ehci: add spurious flag to disable overcurrent
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checking
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This patch adds an ignore_oc flag which can be set by EHCI controller
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not supporting or wanting to disable overcurrent checking. The EHCI
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platform data in include/linux/usb/ehci_pdriver.h is also augmented to
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take advantage of this new flag.
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Signed-off-by: Florian Fainelli <florian@openwrt.org>
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Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
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Link: https://lore.kernel.org/r/20210223174455.1378-2-noltari@gmail.com
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/usb/host/ehci-hcd.c | 2 +-
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drivers/usb/host/ehci-hub.c | 4 ++--
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drivers/usb/host/ehci-platform.c | 2 ++
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drivers/usb/host/ehci.h | 1 +
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include/linux/usb/ehci_pdriver.h | 1 +
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5 files changed, 7 insertions(+), 3 deletions(-)
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--- a/drivers/usb/host/ehci-hcd.c
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+++ b/drivers/usb/host/ehci-hcd.c
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@@ -660,7 +660,7 @@ static int ehci_run (struct usb_hcd *hcd
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"USB %x.%x started, EHCI %x.%02x%s\n",
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((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
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temp >> 8, temp & 0xff,
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- ignore_oc ? ", overcurrent ignored" : "");
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+ (ignore_oc || ehci->spurious_oc) ? ", overcurrent ignored" : "");
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ehci_writel(ehci, INTR_MASK,
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&ehci->regs->intr_enable); /* Turn On Interrupts */
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--- a/drivers/usb/host/ehci-hub.c
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+++ b/drivers/usb/host/ehci-hub.c
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@@ -643,7 +643,7 @@ ehci_hub_status_data (struct usb_hcd *hc
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* always set, seem to clear PORT_OCC and PORT_CSC when writing to
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* PORT_POWER; that's surprising, but maybe within-spec.
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*/
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- if (!ignore_oc)
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+ if (!ignore_oc && !ehci->spurious_oc)
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mask = PORT_CSC | PORT_PEC | PORT_OCC;
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else
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mask = PORT_CSC | PORT_PEC;
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@@ -1013,7 +1013,7 @@ int ehci_hub_control(
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if (temp & PORT_PEC)
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status |= USB_PORT_STAT_C_ENABLE << 16;
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- if ((temp & PORT_OCC) && !ignore_oc){
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+ if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){
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status |= USB_PORT_STAT_C_OVERCURRENT << 16;
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/*
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--- a/drivers/usb/host/ehci-platform.c
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+++ b/drivers/usb/host/ehci-platform.c
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@@ -325,6 +325,8 @@ static int ehci_platform_probe(struct pl
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hcd->has_tt = 1;
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if (pdata->reset_on_resume)
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priv->reset_on_resume = true;
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+ if (pdata->spurious_oc)
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+ ehci->spurious_oc = 1;
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#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
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if (ehci->big_endian_mmio) {
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--- a/drivers/usb/host/ehci.h
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+++ b/drivers/usb/host/ehci.h
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@@ -219,6 +219,7 @@ struct ehci_hcd { /* one per controlle
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unsigned need_oc_pp_cycle:1; /* MPC834X port power */
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unsigned imx28_write_fix:1; /* For Freescale i.MX28 */
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unsigned is_aspeed:1;
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+ unsigned spurious_oc:1;
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/* required for usb32 quirk */
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#define OHCI_CTRL_HCFS (3 << 6)
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--- a/include/linux/usb/ehci_pdriver.h
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+++ b/include/linux/usb/ehci_pdriver.h
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@@ -50,6 +50,7 @@ struct usb_ehci_pdata {
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unsigned no_io_watchdog:1;
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unsigned reset_on_resume:1;
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unsigned dma_mask_64:1;
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+ unsigned spurious_oc:1;
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/* Turn on all power and clocks */
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int (*power_on)(struct platform_device *pdev);
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