On Friday, June 21, 2019 10:59:10 AM CEST Vinod Koul wrote:
> From: Christian Lamparter <chunk...@googlemail.com>
>
> This patch adds a firmware check for the uPD720201K8-711-BAC-A
> and uPD720202K8-711-BAA-A variant. Both of these chips are listed
> in Renesas' R19UH0078EJ0500 Rev.5.00 "User's Manual: Hardware" as
> devices which need a firmware in order to work as they do not have
> support to load the firmware from an external ROM.
>
> Currently, the xhci-pci driver is unable to initialize the hcd in
> this case. Instead it will wait for 30 seconds and cause a timeout
> in xhci_handshake() and fails.
>
> [ 5.116990] xhci_hcd 0000:45:00.0: new USB bus registered ...
> [ 32.335215] xhci_hcd 0000:45:00.0: can't setup: -110
> [ 32.340179] xhci_hcd 0000:45:00.0: USB bus 2 deregistered
> [ 32.345587] xhci_hcd 0000:45:00.0: init 0000:45:00.0 fail, -110
> [ 32.351496] xhci_hcd: probe of 0000:45:00.0 failed with error -110
>
> Cc: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
> Signed-off-by: Christian Lamparter <chunk...@gmail.com>
> Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
> Signed-off-by: Vinod Koul <vk...@kernel.org>
>From what I remember, this was the "backup" patch that just prevented
a stuck device (since the xhci-pci would trigger the watchdog on the
powerpc APM82181). I posted because it because I didn't get any reply
from Greg or Felipe. This patch should be skipable since patch 1/5 adds
the full loader.
> ---
> drivers/usb/host/xhci-pci.c | 59 +++++++++++++++++++++++++++++++++++++
> 1 file changed, 59 insertions(+)
>
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 724d0f567d98..65de5e961892 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -711,6 +711,55 @@ static int renesas_fw_download_to_hw(struct pci_dev
> *pdev,
> return 1;
> }
>
> +static int renesas_check_if_fw_dl_is_needed(struct pci_dev *pdev)
> +{
> + int err;
> + u8 fw_state;
> +
> + /*
> + * Only the uPD720201K8-711-BAC-A or uPD720202K8-711-BAA-A
> + * are listed in R19UH0078EJ0500 Rev.5.00 as devices which
> + * need a firmware in order to work.
> + *
> + * - uPD720202 ES 2.0 sample & CS sample & Mass product, ID is 2.
> + * - uPD720201 ES 2.0 sample whose revision ID is 2.
> + * - uPD720201 ES 2.1 sample & CS sample & Mass product, ID is 3.
> + */
> + if (!((pdev->vendor == PCI_VENDOR_ID_RENESAS) &&
> + ((pdev->device == 0x0015 && pdev->revision == 0x02) ||
> + (pdev->device == 0x0014 &&
> + (pdev->revision == 0x02 || pdev->revision == 0x03)))))
> + return 0;
> +
> + /*
> + * Test if the firmware was uploaded and is running.
> + * As most BIOSes will initialize the device for us.
> + */
> + err = pci_read_config_byte(pdev, 0xf4, &fw_state);
> + if (err)
> + return pcibios_err_to_errno(err);
> +
> + /* Check the "Result Code" Bits (6:4) and act accordingly */
> + switch (fw_state & 0x70) {
> + case 0: /* No result yet */
> + dev_err(&pdev->dev, "FW is not ready/loaded yet.");
> + return -ENODEV;
> +
> + case BIT(4): /* Success, device should be working. */
> + dev_dbg(&pdev->dev, "FW is ready.");
> + return 0;
> +
> + case BIT(5): /* Error State */
> + dev_err(&pdev->dev, "HW is in an error state.");
> + return -ENODEV;
> +
> + default: /* All other states are marked as "Reserved states" */
> + dev_err(&pdev->dev, "HW is in an invalid state (%x).",
> + (fw_state & 0x70) >> 4);
> + return -EINVAL;
> + }
> +}
> +
> /* called during probe() after chip reset completes */
> static int xhci_pci_setup(struct usb_hcd *hcd)
> {
> @@ -765,6 +814,11 @@ static int xhci_pci_probe(struct pci_dev *dev, const
> struct pci_device_id *id)
> return retval;
> };
>
> + /* Check if this device is a RENESAS uPD720201/2 device. */
> + retval = renesas_check_if_fw_dl_is_needed(dev);
> + if (retval)
> + return retval;
> +
> driver = (struct hc_driver *)id->driver_data;
>
> /* Prevent runtime suspending between USB-2 and USB-3 initialization */
> @@ -966,6 +1020,11 @@ static int xhci_pci_resume(struct usb_hcd *hcd, bool
> hibernated)
> if (pdev->vendor == PCI_VENDOR_ID_INTEL)
> usb_enable_intel_xhci_ports(pdev);
>
> + /* Check if this device is a RENESAS uPD720201/2 device. */
> + retval = renesas_check_if_fw_dl_is_needed(pdev);
> + if (retval)
> + return retval;
> +
> if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
> xhci_ssic_port_unused_quirk(hcd, false);
>
>
