mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 16:31:13 +00:00
85 lines
2.8 KiB
Diff
85 lines
2.8 KiB
Diff
From fd483c4e43a983d90c308c4d668e83be4fd6a392 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 */
|
|
@@ -632,6 +632,32 @@ 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)
|
|
|
|
/*
|
|
@@ -1226,6 +1252,9 @@ 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
|
|
@@ -98,7 +98,7 @@ 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,
|