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|
From patchwork Fri Mar 6 11:43:45 2020
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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: linux-kernel@vger.kernel.org,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
bcm-kernel-feedback-list@broadcom.com
Subject: [PATCH v4 1/4] soc: bcm2835: Sync xHCI reset firmware property with
downstream
Date: Fri, 6 Mar 2020 12:43:45 +0100
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Cc: tim.gover@raspberrypi.org, gregkh@linuxfoundation.org,
linux-usb@vger.kernel.org, linux-rpi-kernel@lists.infradead.org,
linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
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The property is needed in order to trigger VL805's firmware load. Note
that there is a gap between the property introduced and the previous
one. This is also the case downstream.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
include/soc/bcm2835/raspberrypi-firmware.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index 7800e12ee042..cc9cdbc66403 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -90,7 +90,7 @@ 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,
From patchwork Fri Mar 6 11:43:46 2020
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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: linux-kernel@vger.kernel.org,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
bcm-kernel-feedback-list@broadcom.com
Subject: [PATCH v4 2/4] firmware: raspberrypi: Introduce vl805 init routine
Date: Fri, 6 Mar 2020 12:43:46 +0100
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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. The function informs VideCore that VL805 was just reset, or
requests for a probe defer.
Based on Tim Gover's downstream implementation.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Changes since v1:
- Move include into .c file and add forward declaration to .h
drivers/firmware/raspberrypi.c | 38 ++++++++++++++++++++++
include/soc/bcm2835/raspberrypi-firmware.h | 7 ++++
2 files changed, 45 insertions(+)
diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index da26a584dca0..cbb495aff6a0 100644
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -12,6 +12,7 @@
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/pci.h>
#include <soc/bcm2835/raspberrypi-firmware.h>
#define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf))
@@ -286,6 +287,43 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
}
EXPORT_SYMBOL_GPL(rpi_firmware_get);
+/*
+ * 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, or defer xhci's probe if not yet
+ * joinable trough the mailbox interface.
+ */
+int rpi_firmware_init_vl805(struct pci_dev *pdev)
+{
+ struct device_node *fw_np;
+ struct rpi_firmware *fw;
+ u32 dev_addr;
+ int ret;
+
+ fw_np = of_find_compatible_node(NULL, NULL,
+ "raspberrypi,bcm2835-firmware");
+ if (!fw_np)
+ return 0;
+
+ fw = rpi_firmware_get(fw_np);
+ of_node_put(fw_np);
+ if (!fw)
+ return -EPROBE_DEFER;
+
+ dev_addr = pdev->bus->number << 20 | PCI_SLOT(pdev->devfn) << 15 |
+ PCI_FUNC(pdev->devfn) << 12;
+
+ ret = rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_XHCI_RESET,
+ &dev_addr, sizeof(dev_addr));
+ if (ret)
+ return ret;
+
+ dev_dbg(&pdev->dev, "loaded Raspberry Pi's VL805 firmware\n");
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rpi_firmware_init_vl805);
+
static const struct of_device_id rpi_firmware_of_match[] = {
{ .compatible = "raspberrypi,bcm2835-firmware", },
{},
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index cc9cdbc66403..c161bdab759d 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -10,6 +10,7 @@
#include <linux/of_device.h>
struct rpi_firmware;
+struct pci_dev;
enum rpi_firmware_property_status {
RPI_FIRMWARE_STATUS_REQUEST = 0,
@@ -141,6 +142,7 @@ int rpi_firmware_property(struct rpi_firmware *fw,
int rpi_firmware_property_list(struct rpi_firmware *fw,
void *data, size_t tag_size);
struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
+int rpi_firmware_init_vl805(struct pci_dev *pdev);
#else
static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
void *data, size_t len)
@@ -158,6 +160,11 @@ static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware
{
return NULL;
}
+
+static int rpi_firmware_init_vl805(struct pci_dev *pdev)
+{
+ return 0;
+}
#endif
#endif /* __SOC_RASPBERRY_FIRMWARE_H__ */
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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: linux-kernel@vger.kernel.org, Florian Fainelli <f.fainelli@gmail.com>,
bcm-kernel-feedback-list@broadcom.com,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Andrew Murray <amurray@thegoodpenguin.co.uk>
Subject: [PATCH v4 3/4] PCI: brcmstb: Wait for Raspberry Pi's firmware when
present
Date: Fri, 6 Mar 2020 12:43:47 +0100
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Cc: tim.gover@raspberrypi.org, gregkh@linuxfoundation.org,
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xHCI's PCI fixup, run at the end of pcie-brcmstb's probe, depends on
RPi4's VideoCore firmware interface to be up and running. It's possible
for both initializations to race, so make sure it's available prior
starting.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
drivers/pci/controller/pcie-brcmstb.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 3a10e678c7f4..a3d3070a5832 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -28,6 +28,8 @@
#include <linux/string.h>
#include <linux/types.h>
+#include <soc/bcm2835/raspberrypi-firmware.h>
+
#include "../pci.h"
/* BRCM_PCIE_CAP_REGS - Offset for the mandatory capability config regs */
@@ -917,11 +919,24 @@ static int brcm_pcie_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node, *msi_np;
struct pci_host_bridge *bridge;
+ struct device_node *fw_np;
struct brcm_pcie *pcie;
struct pci_bus *child;
struct resource *res;
int ret;
+ /*
+ * We have to wait for the Raspberry Pi's firmware interface to be up
+ * as some PCI fixups depend on it.
+ */
+ fw_np = of_find_compatible_node(NULL, NULL,
+ "raspberrypi,bcm2835-firmware");
+ if (fw_np && !rpi_firmware_get(fw_np)) {
+ of_node_put(fw_np);
+ return -EPROBE_DEFER;
+ }
+ of_node_put(fw_np);
+
bridge = devm_pci_alloc_host_bridge(&pdev->dev, sizeof(*pcie));
if (!bridge)
return -ENOMEM;
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Mathias Nyman <mathias.nyman@intel.com>
Subject: [PATCH v4 4/4] USB: pci-quirks: Add Raspberry Pi 4 quirk
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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 <nsaenzjulienne@suse.de>
---
Changes since v3:
- Add more complete error message.
- Add braces around if statement
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..452f5f12b042 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\n", ret);
+ dev_warn(&pdev->dev, "Will continue to attempt to work, "
+ "but bad things might happen. You should fix this...\n");
+ }
+ }
+
if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&
pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&
pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
|
