target/linux/generic/pending-4.19/110-ehci_hcd_ignore_oc.patch

   1 From: Florian Fainelli <florian@openwrt.org>
   2 Subject: USB: EHCI: add ignore_oc flag to disable overcurrent checking
   3
   4 This patch adds an ignore_oc flag which can be set by EHCI controller
   5 not supporting or wanting to disable overcurrent checking. The EHCI
   6 platform data in include/linux/usb/ehci_pdriver.h is also augmented to
   7 take advantage of this new flag.
   8
   9 Signed-off-by: Florian Fainelli <florian@openwrt.org>
  10 ---
  11  drivers/usb/host/ehci-hcd.c      |    2 +-
  12  drivers/usb/host/ehci-hub.c      |    4 ++--
  13  drivers/usb/host/ehci-platform.c |    1 +
  14  drivers/usb/host/ehci.h          |    1 +
  15  include/linux/usb/ehci_pdriver.h |    1 +
  16  5 files changed, 6 insertions(+), 3 deletions(-)
  17
  18 --- a/drivers/usb/host/ehci-hcd.c
  19 +++ b/drivers/usb/host/ehci-hcd.c
  20 @@ -638,7 +638,7 @@ static int ehci_run (struct usb_hcd *hcd
  21                 "USB %x.%x started, EHCI %x.%02x%s\n",
  22                 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
  23                 temp >> 8, temp & 0xff,
  24 -               ignore_oc ? ", overcurrent ignored" : "");
  25 +               (ignore_oc || ehci->ignore_oc) ? ", overcurrent ignored" : "");
  26
  27         ehci_writel(ehci, INTR_MASK,
  28                     &ehci->regs->intr_enable); /* Turn On Interrupts */
  29 --- a/drivers/usb/host/ehci-hub.c
  30 +++ b/drivers/usb/host/ehci-hub.c
  31 @@ -641,7 +641,7 @@ ehci_hub_status_data (struct usb_hcd *hc
  32          * always set, seem to clear PORT_OCC and PORT_CSC when writing to
  33          * PORT_POWER; that's surprising, but maybe within-spec.
  34          */
  35 -       if (!ignore_oc)
  36 +       if (!ignore_oc && !ehci->ignore_oc)
  37                 mask = PORT_CSC | PORT_PEC | PORT_OCC;
  38         else
  39                 mask = PORT_CSC | PORT_PEC;
  40 @@ -1011,7 +1011,7 @@ int ehci_hub_control(
  41                 if (temp & PORT_PEC)
  42                         status |= USB_PORT_STAT_C_ENABLE << 16;
  43
  44 -               if ((temp & PORT_OCC) && !ignore_oc){
  45 +               if ((temp & PORT_OCC) && (!ignore_oc && !ehci->ignore_oc)){
  46                         status |= USB_PORT_STAT_C_OVERCURRENT << 16;
  47
  48                         /*
  49 --- a/drivers/usb/host/ehci-platform.c
  50 +++ b/drivers/usb/host/ehci-platform.c
  51 @@ -208,6 +208,8 @@ static int ehci_platform_probe(struct pl
  52                 hcd->has_tt = 1;
  53         if (pdata->reset_on_resume)
  54                 priv->reset_on_resume = true;
  55 +       if (pdata->ignore_oc)
  56 +               ehci->ignore_oc = 1;
  57
  58  #ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
  59         if (ehci->big_endian_mmio) {
  60 --- a/drivers/usb/host/ehci.h
  61 +++ b/drivers/usb/host/ehci.h
  62 @@ -218,6 +218,7 @@ struct ehci_hcd {                   /* one per controlle
  63         unsigned                frame_index_bug:1; /* MosChip (AKA NetMos) */
  64         unsigned                need_oc_pp_cycle:1; /* MPC834X port power */
  65         unsigned                imx28_write_fix:1; /* For Freescale i.MX28 */
  66 +       unsigned                ignore_oc:1;
  67
  68         /* required for usb32 quirk */
  69         #define OHCI_CTRL_HCFS          (3 << 6)
  70 --- a/include/linux/usb/ehci_pdriver.h
  71 +++ b/include/linux/usb/ehci_pdriver.h
  72 @@ -50,6 +50,7 @@ struct usb_ehci_pdata {
  73         unsigned        no_io_watchdog:1;
  74         unsigned        reset_on_resume:1;
  75         unsigned        dma_mask_64:1;
  76 +       unsigned        ignore_oc:1;
  77
  78         /* Turn on all power and clocks */
  79         int (*power_on)(struct platform_device *pdev);