From patchwork Thu Apr 30 13:04:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 239002 List-Id: U-Boot discussion From: nsaenzjulienne at suse.de (Nicolas Saenz Julienne) Date: Thu, 30 Apr 2020 15:04:32 +0200 Subject: [PATCH v2 1/2] arm: rpi: Add function to trigger VL805's firmware load In-Reply-To: <20200430130433.11248-1-nsaenzjulienne@suse.de> References: <20200430130433.11248-1-nsaenzjulienne@suse.de> Message-ID: <20200430130433.11248-2-nsaenzjulienne@suse.de> On the Raspberry Pi 4, after a PCI reset, VL805's (a xHCI chip) firmware may either be loaded directly from an EEPROM or, if not present, by the SoC's VideoCore (the SoC's co-processor). Introduce the function that informs VideoCore that VL805 may need its firmware loaded. Signed-off-by: Nicolas Saenz Julienne --- Changes since v1: - Rename function so it's not mistaken with regular firmware loading arch/arm/mach-bcm283x/include/mach/mbox.h | 13 +++++++ arch/arm/mach-bcm283x/include/mach/msg.h | 7 ++++ arch/arm/mach-bcm283x/msg.c | 43 +++++++++++++++++++++++ 3 files changed, 63 insertions(+) diff --git a/arch/arm/mach-bcm283x/include/mach/mbox.h b/arch/arm/mach-bcm283x/include/mach/mbox.h index 60e226ce1d..2ae2d3d97c 100644 --- a/arch/arm/mach-bcm283x/include/mach/mbox.h +++ b/arch/arm/mach-bcm283x/include/mach/mbox.h @@ -491,6 +491,19 @@ struct bcm2835_mbox_tag_set_palette { } body; }; +#define BCM2835_MBOX_TAG_NOTIFY_XHCI_RESET 0x00030058 + +struct bcm2835_mbox_tag_pci_dev_addr { + struct bcm2835_mbox_tag_hdr tag_hdr; + union { + struct { + u32 dev_addr; + } req; + struct { + } resp; + } body; +}; + /* * Pass a raw u32 message to the VC, and receive a raw u32 back. * diff --git a/arch/arm/mach-bcm283x/include/mach/msg.h b/arch/arm/mach-bcm283x/include/mach/msg.h index 4afb08631b..e45c1bf010 100644 --- a/arch/arm/mach-bcm283x/include/mach/msg.h +++ b/arch/arm/mach-bcm283x/include/mach/msg.h @@ -48,4 +48,11 @@ int bcm2835_set_video_params(int *widthp, int *heightp, int depth_bpp, int pixel_order, int alpha_mode, ulong *fb_basep, ulong *fb_sizep, int *pitchp); +/** + * bcm2711_load_vl805_firmware() - get vl805's firmware loaded + * + * @return 0 if OK, -EIO on error + */ +int bcm2711_notify_vl805_reset(void); + #endif diff --git a/arch/arm/mach-bcm283x/msg.c b/arch/arm/mach-bcm283x/msg.c index 94b75283f8..a338190d33 100644 --- a/arch/arm/mach-bcm283x/msg.c +++ b/arch/arm/mach-bcm283x/msg.c @@ -40,6 +40,12 @@ struct msg_setup { u32 end_tag; }; +struct msg_notify_vl805_reset { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_pci_dev_addr dev_addr; + u32 end_tag; +}; + int bcm2835_power_on_module(u32 module) { ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); @@ -151,3 +157,40 @@ int bcm2835_set_video_params(int *widthp, int *heightp, int depth_bpp, return 0; } + +/* + * On the Raspberry Pi 4, after a PCI reset, VL805's (the xHCI chip) firmware + * may either be loaded directly from an EEPROM or, if not present, by the + * SoC's VideoCore. This informs VideoCore that VL805 needs its firmware + * loaded. + */ +int bcm2711_notify_vl805_reset(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(struct msg_notify_vl805_reset, + msg_notify_vl805_reset, 1); + int ret; + + BCM2835_MBOX_INIT_HDR(msg_notify_vl805_reset); + BCM2835_MBOX_INIT_TAG(&msg_notify_vl805_reset->dev_addr, + NOTIFY_XHCI_RESET); + + /* + * The pci device address is expected like this: + * + * PCI_BUS << 20 | PCI_SLOT << 15 | PCI_FUNC << 12 + * + * But since RPi4's PCIe setup is hardwired, we know the address in + * advance. + */ + msg_notify_vl805_reset->dev_addr.body.req.dev_addr = 0x100000; + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, + &msg_notify_vl805_reset->hdr); + if (ret) { + printf("bcm2711: Faild to load vl805's firmware, %d\n", ret); + return -EIO; + } + + return 0; +} + From patchwork Thu Apr 30 13:04:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 239003 List-Id: U-Boot discussion From: nsaenzjulienne at suse.de (Nicolas Saenz Julienne) Date: Thu, 30 Apr 2020 15:04:33 +0200 Subject: [PATCH v2 2/2] usb: xhci: Load Raspberry Pi 4 VL805's firmware In-Reply-To: <20200430130433.11248-1-nsaenzjulienne@suse.de> References: <20200430130433.11248-1-nsaenzjulienne@suse.de> Message-ID: <20200430130433.11248-3-nsaenzjulienne@suse.de> When needed, RPi4's co-processor (called VideoCore) has to be instructed to load VL805's firmware (the chip providing xHCI support). VideoCore's firmware expects the board's PCIe bus to be already configured in order for it to load the xHCI chip firmware. So we have to make sure this happens in between the PCIe configuration and xHCI startup. Introduce a callback in xhci_pci_probe() to run this platform specific routine. Signed-off-by: Nicolas Saenz Julienne --- Changes since v1: - Create callback board/raspberrypi/rpi/rpi.c | 12 ++++++++++++ drivers/usb/host/xhci-pci.c | 6 ++++++ include/usb/xhci.h | 3 +++ 3 files changed, 21 insertions(+) diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index e367ba3092..8aa78d1f48 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -494,3 +495,14 @@ int ft_board_setup(void *blob, bd_t *bd) return 0; } + +#ifdef CONFIG_BCM2711 +void xhci_pci_fixup(struct udevice *dev) +{ + int ret; + + ret = bcm2711_notify_vl805_reset(); + if (ret) + printf("RPI: Failed to notify VideoCore about vl805's firmware\n"); +} +#endif diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index c1f60da541..1285dde1ef 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -11,6 +11,10 @@ #include #include +__weak void xhci_pci_fixup(struct udevice *dev) +{ +} + static void xhci_pci_init(struct udevice *dev, struct xhci_hccr **ret_hccr, struct xhci_hcor **ret_hcor) { @@ -40,6 +44,8 @@ static int xhci_pci_probe(struct udevice *dev) struct xhci_hccr *hccr; struct xhci_hcor *hcor; + xhci_pci_fixup(dev); + xhci_pci_init(dev, &hccr, &hcor); return xhci_register(dev, hccr, hcor); diff --git a/include/usb/xhci.h b/include/usb/xhci.h index c16106a2fc..57feed7603 100644 --- a/include/usb/xhci.h +++ b/include/usb/xhci.h @@ -16,6 +16,7 @@ #ifndef HOST_XHCI_H_ #define HOST_XHCI_H_ +#include #include #include #include @@ -1281,4 +1282,6 @@ extern struct dm_usb_ops xhci_usb_ops; struct xhci_ctrl *xhci_get_ctrl(struct usb_device *udev); +extern void xhci_pci_fixup(struct udevice *dev); + #endif /* HOST_XHCI_H_ */