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authorChristian Lamparter <chunkeey@googlemail.com>2016-06-08 00:14:57 +0200
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-03-23 09:54:38 -0700
commit663bcbb00857239b505d885d7b123f2dc2bfeba0 (patch)
treef4d9fd1af380be22a014d879e549141ebf3471e0
parentd453a9868729d9f384b703d3f34f119c242e6928 (diff)
downloadkernel-tracking-qcomlt-sdm845-pcie.tar.gz
usb: xhci: handle uPD720201 and uPD720202 w/o ROMtracking-qcomlt-sdm845-pcie
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.uh@renesas.com> Signed-off-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
-rw-r--r--drivers/usb/host/xhci-pci.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index a400cf7b39da..38a56128c1ee 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -733,6 +733,55 @@ 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)
{
@@ -787,6 +836,11 @@ 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 */
@@ -988,6 +1042,11 @@ 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);