[PATCH v5 4/4] USB: pci-quirks: Add Raspberry Pi 4 quirk
From: Nicolas Saenz Julienne <hidden>
Date: 2020-03-10 13:28:29
Also in:
linux-pci, linux-usb, lkml
Subsystem:
the rest, usb subsystem, usb xhci driver · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Mathias Nyman
On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be loaded directly from an EEPROM or, if not present, by the SoC's VideCore. Inform VideCore that VL805 was just reset. Also, as this creates a dependency between XHCI_PCI and VideoCore's firmware interface, reflect that on the firmware interface Kconfg. Signed-off-by: Nicolas Saenz Julienne <redacted> --- Changes since v4: - Do not split up error message Changes since v3: - Add more complete error message Changes since v1: - Make RASPBERRYPI_FIRMWARE dependent on this quirk to make sure it gets compiled when needed. drivers/firmware/Kconfig | 1 + drivers/usb/host/pci-quirks.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+)
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index ea869addc89b..40a468d712a5 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig@@ -180,6 +180,7 @@ config ISCSI_IBFT config RASPBERRYPI_FIRMWARE tristate "Raspberry Pi Firmware Driver" depends on BCM2835_MBOX + default XHCI_PCI help This option enables support for communicating with the firmware on the Raspberry Pi.
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index beb2efa71341..0dc34668bb2a 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c@@ -16,6 +16,9 @@ #include <linux/export.h> #include <linux/acpi.h> #include <linux/dmi.h> + +#include <soc/bcm2835/raspberrypi-firmware.h> + #include "pci-quirks.h" #include "xhci-ext-caps.h"
@@ -1243,11 +1246,24 @@ static void quirk_usb_handoff_xhci(struct pci_dev *pdev) static void quirk_usb_early_handoff(struct pci_dev *pdev) { + int ret; + /* Skip Netlogic mips SoC's internal PCI USB controller. * This device does not need/support EHCI/OHCI handoff */ if (pdev->vendor == 0x184e) /* vendor Netlogic */ return; + + if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) { + ret = rpi_firmware_init_vl805(pdev); + if (ret) { + /* Firmware might be outdated, or something failed */ + dev_warn(&pdev->dev, + "Failed to load VL805's firmware: %d. Will continue to attempt to work, but bad things might happen. You should fix this...\n", + ret); + } + } + if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && pdev->class != PCI_CLASS_SERIAL_USB_OHCI && pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
--
2.25.1
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