diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/850-v5.13-usb-ehci-add-spurious-flag-to-disable-overcurrent-ch.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/850-v5.13-usb-ehci-add-spurious-flag-to-disable-overcurrent-ch.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/850-v5.13-usb-ehci-add-spurious-flag-to-disable-overcurrent-ch.patch b/target/linux/generic/backport-5.4/850-v5.13-usb-ehci-add-spurious-flag-to-disable-overcurrent-ch.patch new file mode 100644 index 0000000000..bda1d1df36 --- /dev/null +++ b/target/linux/generic/backport-5.4/850-v5.13-usb-ehci-add-spurious-flag-to-disable-overcurrent-ch.patch @@ -0,0 +1,88 @@ +From 2d5ba37461013253d2ff0a3641b727fd32ea97a9 Mon Sep 17 00:00:00 2001 +From: Florian Fainelli <florian@openwrt.org> +Date: Tue, 23 Feb 2021 18:44:53 +0100 +Subject: [PATCH 1/3] usb: ehci: add spurious flag to disable overcurrent + checking +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This patch adds an ignore_oc flag which can be set by EHCI controller +not supporting or wanting to disable overcurrent checking. The EHCI +platform data in include/linux/usb/ehci_pdriver.h is also augmented to +take advantage of this new flag. + +Signed-off-by: Florian Fainelli <florian@openwrt.org> +Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> +Link: https://lore.kernel.org/r/20210223174455.1378-2-noltari@gmail.com +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/usb/host/ehci-hcd.c | 2 +- + drivers/usb/host/ehci-hub.c | 4 ++-- + drivers/usb/host/ehci-platform.c | 2 ++ + drivers/usb/host/ehci.h | 1 + + include/linux/usb/ehci_pdriver.h | 1 + + 5 files changed, 7 insertions(+), 3 deletions(-) + +--- a/drivers/usb/host/ehci-hcd.c ++++ b/drivers/usb/host/ehci-hcd.c +@@ -651,7 +651,7 @@ static int ehci_run (struct usb_hcd *hcd + "USB %x.%x started, EHCI %x.%02x%s\n", + ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), + temp >> 8, temp & 0xff, +- ignore_oc ? ", overcurrent ignored" : ""); ++ (ignore_oc || ehci->spurious_oc) ? ", overcurrent ignored" : ""); + + ehci_writel(ehci, INTR_MASK, + &ehci->regs->intr_enable); /* Turn On Interrupts */ +--- a/drivers/usb/host/ehci-hub.c ++++ b/drivers/usb/host/ehci-hub.c +@@ -643,7 +643,7 @@ ehci_hub_status_data (struct usb_hcd *hc + * always set, seem to clear PORT_OCC and PORT_CSC when writing to + * PORT_POWER; that's surprising, but maybe within-spec. + */ +- if (!ignore_oc) ++ if (!ignore_oc && !ehci->spurious_oc) + mask = PORT_CSC | PORT_PEC | PORT_OCC; + else + mask = PORT_CSC | PORT_PEC; +@@ -1013,7 +1013,7 @@ int ehci_hub_control( + if (temp & PORT_PEC) + status |= USB_PORT_STAT_C_ENABLE << 16; + +- if ((temp & PORT_OCC) && !ignore_oc){ ++ if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){ + status |= USB_PORT_STAT_C_OVERCURRENT << 16; + + /* +--- a/drivers/usb/host/ehci-platform.c ++++ b/drivers/usb/host/ehci-platform.c +@@ -319,6 +319,8 @@ static int ehci_platform_probe(struct pl + hcd->has_tt = 1; + if (pdata->reset_on_resume) + priv->reset_on_resume = true; ++ if (pdata->spurious_oc) ++ ehci->spurious_oc = 1; + + #ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO + if (ehci->big_endian_mmio) { +--- a/drivers/usb/host/ehci.h ++++ b/drivers/usb/host/ehci.h +@@ -218,6 +218,7 @@ struct ehci_hcd { /* one per controlle + unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */ + unsigned need_oc_pp_cycle:1; /* MPC834X port power */ + unsigned imx28_write_fix:1; /* For Freescale i.MX28 */ ++ unsigned spurious_oc:1; + + /* required for usb32 quirk */ + #define OHCI_CTRL_HCFS (3 << 6) +--- a/include/linux/usb/ehci_pdriver.h ++++ b/include/linux/usb/ehci_pdriver.h +@@ -50,6 +50,7 @@ struct usb_ehci_pdata { + unsigned no_io_watchdog:1; + unsigned reset_on_resume:1; + unsigned dma_mask_64:1; ++ unsigned spurious_oc:1; + + /* Turn on all power and clocks */ + int (*power_on)(struct platform_device *pdev); |