6c2cc50051
* Sun Apr 26 2020 CKI@GitLab <cki-project@redhat.com> [5.7.0-0.rc3.1]
- v5.7-rc3 rebase
- Add cec to the filter overrides ("Justin M. Forbes")
- Add overrides to filter-modules.sh ("Justin M. Forbes")
- Adjust the changelog update script to not push anything (Jeremy Cline)
- Drop --target noarch from the rh-rpms make target (Jeremy Cline)
Resolves: rhbz#
Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>
111 lines
3.5 KiB
Diff
111 lines
3.5 KiB
Diff
From 7c3b7f494b20f5c8360817dc46ae37ebc269a0cc Mon Sep 17 00:00:00 2001
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From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Date: Tue, 10 Mar 2020 13:52:40 +0100
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Subject: [PATCH] firmware: raspberrypi: Introduce vl805 init routine
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On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be
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loaded directly from an EEPROM or, if not present, by the SoC's
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VideCore. The function informs VideCore that VL805 was just reset, or
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requests for a probe defer.
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Based on Tim Gover's downstream implementation.
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Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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---
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drivers/firmware/raspberrypi.c | 38 ++++++++++++++++++++++
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include/soc/bcm2835/raspberrypi-firmware.h | 7 ++++
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2 files changed, 45 insertions(+)
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diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
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index da26a584dca0..cbb495aff6a0 100644
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--- a/drivers/firmware/raspberrypi.c
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+++ b/drivers/firmware/raspberrypi.c
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@@ -12,6 +12,7 @@
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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+#include <linux/pci.h>
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#include <soc/bcm2835/raspberrypi-firmware.h>
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#define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf))
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@@ -286,6 +287,43 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
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}
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EXPORT_SYMBOL_GPL(rpi_firmware_get);
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+/*
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+ * On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be
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+ * loaded directly from an EEPROM or, if not present, by the SoC's VideCore.
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+ * Inform VideCore that VL805 was just reset, or defer xhci's probe if not yet
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+ * joinable trough the mailbox interface.
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+ */
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+int rpi_firmware_init_vl805(struct pci_dev *pdev)
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+{
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+ struct device_node *fw_np;
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+ struct rpi_firmware *fw;
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+ u32 dev_addr;
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+ int ret;
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+
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+ fw_np = of_find_compatible_node(NULL, NULL,
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+ "raspberrypi,bcm2835-firmware");
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+ if (!fw_np)
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+ return 0;
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+
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+ fw = rpi_firmware_get(fw_np);
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+ of_node_put(fw_np);
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+ if (!fw)
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+ return -EPROBE_DEFER;
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+
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+ dev_addr = pdev->bus->number << 20 | PCI_SLOT(pdev->devfn) << 15 |
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+ PCI_FUNC(pdev->devfn) << 12;
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+
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+ ret = rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_XHCI_RESET,
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+ &dev_addr, sizeof(dev_addr));
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+ if (ret)
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+ return ret;
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+
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+ dev_dbg(&pdev->dev, "loaded Raspberry Pi's VL805 firmware\n");
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(rpi_firmware_init_vl805);
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+
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static const struct of_device_id rpi_firmware_of_match[] = {
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{ .compatible = "raspberrypi,bcm2835-firmware", },
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{},
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diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
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index cc9cdbc66403..3025aca3c358 100644
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--- a/include/soc/bcm2835/raspberrypi-firmware.h
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+++ b/include/soc/bcm2835/raspberrypi-firmware.h
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@@ -10,6 +10,7 @@
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#include <linux/of_device.h>
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struct rpi_firmware;
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+struct pci_dev;
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enum rpi_firmware_property_status {
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RPI_FIRMWARE_STATUS_REQUEST = 0,
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@@ -141,6 +142,7 @@ int rpi_firmware_property(struct rpi_firmware *fw,
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int rpi_firmware_property_list(struct rpi_firmware *fw,
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void *data, size_t tag_size);
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struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
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+int rpi_firmware_init_vl805(struct pci_dev *pdev);
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#else
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static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
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void *data, size_t len)
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@@ -158,6 +160,11 @@ static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware
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{
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return NULL;
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}
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+
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+static inline int rpi_firmware_init_vl805(struct pci_dev *pdev)
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+{
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+ return 0;
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+}
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#endif
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#endif /* __SOC_RASPBERRY_FIRMWARE_H__ */
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--
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2.26.2
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