diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0409-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0409-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0409-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch b/target/linux/bcm27xx/patches-5.4/950-0409-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch new file mode 100644 index 0000000000..06e979a462 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0409-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch @@ -0,0 +1,84 @@ +From 333c4158645fe8aaacbd644bcdf7bc4c5b93cc26 Mon Sep 17 00:00:00 2001 +From: Tim Gover <990920+timg236@users.noreply.github.com> +Date: Wed, 15 Jan 2020 11:26:19 +0000 +Subject: [PATCH] usb: xhci: Raspberry Pi FW loader for VIA VL805 + +The VL805 FW may either be loaded from an SPI EEPROM or alternatively +loaded directly by the VideoCore firmware. A PCI reset will reset +the VL805 XHCI controller on the Raspberry Pi4 requiring the firmware +to be reloaded if an SPI EEPROM is not present. + +Use a VideoCore mailbox to trigger the loading of the VL805 +firmware (if necessary) after a PCI reset. + +Signed-off-by: Tim Gover <tim.gover@raspberrypi.org> +--- + drivers/usb/host/pci-quirks.c | 31 +++++++++++++++++++++- + include/soc/bcm2835/raspberrypi-firmware.h | 2 +- + 2 files changed, 31 insertions(+), 2 deletions(-) + +--- a/drivers/usb/host/pci-quirks.c ++++ b/drivers/usb/host/pci-quirks.c +@@ -18,7 +18,7 @@ + #include <linux/dmi.h> + #include "pci-quirks.h" + #include "xhci-ext-caps.h" +- ++#include <soc/bcm2835/raspberrypi-firmware.h> + + #define UHCI_USBLEGSUP 0xc0 /* legacy support */ + #define UHCI_USBCMD 0 /* command register */ +@@ -634,6 +634,32 @@ EXPORT_SYMBOL_GPL(usb_amd_pt_check_port) + + #endif /* CONFIG_PCI_DISABLE_COMMON_QUIRKS */ + ++/* The VL805 firmware may either be loaded from an EEPROM or by the BIOS into ++ * memory. If run from memory it must be reloaded after a PCI fundmental reset. ++ * The Raspberry Pi firmware acts as the BIOS in this case. ++ */ ++static void usb_vl805_init(struct pci_dev *pdev) ++{ ++#if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE) ++ struct rpi_firmware *fw; ++ struct { ++ u32 dev_addr; ++ } packet; ++ int ret; ++ ++ fw = rpi_firmware_get(NULL); ++ if (!fw) ++ return; ++ ++ packet.dev_addr = (pdev->bus->number << 20) | ++ (PCI_SLOT(pdev->devfn) << 15) | (PCI_FUNC(pdev->devfn) << 12); ++ ++ dev_dbg(&pdev->dev, "RPI_FIRMWARE_NOTIFY_XHCI_RESET %x", packet.dev_addr); ++ ret = rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_XHCI_RESET, ++ &packet, sizeof(packet)); ++#endif ++} ++ + #if IS_ENABLED(CONFIG_USB_UHCI_HCD) + + /* +@@ -1222,6 +1248,9 @@ hc_init: + if (pdev->vendor == PCI_VENDOR_ID_INTEL) + usb_enable_intel_xhci_ports(pdev); + ++ if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) ++ usb_vl805_init(pdev); ++ + op_reg_base = base + XHCI_HC_LENGTH(readl(base)); + + /* Wait for the host controller to be ready before writing any +--- a/include/soc/bcm2835/raspberrypi-firmware.h ++++ b/include/soc/bcm2835/raspberrypi-firmware.h +@@ -95,7 +95,7 @@ enum rpi_firmware_property_tag { + RPI_FIRMWARE_SET_PERIPH_REG = 0x00038045, + RPI_FIRMWARE_GET_POE_HAT_VAL = 0x00030049, + RPI_FIRMWARE_SET_POE_HAT_VAL = 0x00030050, +- ++ RPI_FIRMWARE_NOTIFY_XHCI_RESET = 0x00030058, + + /* Dispmanx TAGS */ + RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE = 0x00040001, |