297 lines
13 KiB
Diff
297 lines
13 KiB
Diff
From patchwork Wed Aug 10 12:39:26 2022
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X-Patchwork-Submitter: Antoine Mazeas <antoine@karthanis.net>
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From: Antoine Mazeas <antoine@karthanis.net>
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To: u-boot@lists.denx.de
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Cc: Antoine Mazeas <antoine@karthanis.net>,
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Sjoerd Simons <sjoerd@collabora.com>
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Subject: [PATCH 1/2] rpi: Copy properties from firmware dtb to the loaded dtb
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Date: Wed, 10 Aug 2022 14:39:26 +0200
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Message-Id: <20220810123927.2567677-2-antoine@karthanis.net>
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The RPI firmware adjusts several property values in the dtb it passes
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to u-boot depending on the board/SoC revision. Inherit some of these
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when u-boot loads a dtb itself. Specificaly copy:
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* /model: The firmware provides a more specific string
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* /memreserve: The firmware defines a reserved range, better keep it
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* emmc2bus and pcie0 dma-ranges: The C0T revision of the bcm2711 Soc (as
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present on rpi 400 and some rpi 4B boards) has different values for
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these then the B0T revision. So these need to be adjusted to boot on
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these boards
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* blconfig: The firmware defines the memory area where the blconfig
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stored. Copy those over so it can be enabled.
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* /chosen/kaslr-seed: The firmware generates a kaslr seed, take advantage
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of that.
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Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>
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---
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board/raspberrypi/rpi/rpi.c | 48 +++++++++++++++++++++++++++++++++++++
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1 file changed, 48 insertions(+)
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diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
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index 17b8108cc8..28b6f52506 100644
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--- a/board/raspberrypi/rpi/rpi.c
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+++ b/board/raspberrypi/rpi/rpi.c
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@@ -504,10 +504,58 @@ void *board_fdt_blob_setup(int *err)
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return (void *)fw_dtb_pointer;
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}
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+int copy_property(void *dst, void *src, char *path, char *property)
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+{
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+ int dst_offset, src_offset;
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+ const fdt32_t *prop;
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+ int len;
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+
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+ src_offset = fdt_path_offset(src, path);
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+ dst_offset = fdt_path_offset(dst, path);
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+
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+ if (src_offset < 0 || dst_offset < 0)
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+ return -1;
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+
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+ prop = fdt_getprop(src, src_offset, property, &len);
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+ if (!prop)
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+ return -1;
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+
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+ return fdt_setprop(dst, dst_offset, property, prop, len);
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+}
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+
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+/* Copy tweaks from the firmware dtb to the loaded dtb */
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+void update_fdt_from_fw(void *fdt, void *fw_fdt)
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+{
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+ /* Using dtb from firmware directly; leave it alone */
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+ if (fdt == fw_fdt)
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+ return;
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+
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+ /* The firmware provides a more precie model; so copy that */
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+ copy_property(fdt, fw_fdt, "/", "model");
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+
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+ /* memory reserve as suggested by the firmware */
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+ copy_property(fdt, fw_fdt, "/", "memreserve");
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+
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+ /* Adjust dma-ranges for the SD card and PCI bus as they can depend on
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+ * the SoC revision
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+ */
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+ copy_property(fdt, fw_fdt, "emmc2bus", "dma-ranges");
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+ copy_property(fdt, fw_fdt, "pcie0", "dma-ranges");
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+
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+ /* Bootloader configuration template exposes as nvmem */
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+ if (copy_property(fdt, fw_fdt, "blconfig", "reg") == 0)
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+ copy_property(fdt, fw_fdt, "blconfig", "status");
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+
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+ /* kernel address randomisation seed as provided by the firmware */
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+ copy_property(fdt, fw_fdt, "/chosen", "kaslr-seed");
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+}
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+
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int ft_board_setup(void *blob, struct bd_info *bd)
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{
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int node;
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+ update_fdt_from_fw(blob, (void *)fw_dtb_pointer);
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+
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node = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
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if (node < 0)
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fdt_simplefb_add_node(blob);
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From patchwork Wed Aug 10 12:39:27 2022
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X-Patchwork-Submitter: Antoine Mazeas <antoine@karthanis.net>
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X-Patchwork-Id: 1665243
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X-Patchwork-Delegate: matthias.bgg@gmail.com
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From: Antoine Mazeas <antoine@karthanis.net>
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To: u-boot@lists.denx.de
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Cc: Antoine Mazeas <antoine@karthanis.net>
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Subject: [PATCH 2/2] rpi: Copy eth PHY address from fw DT to loaded DT
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Date: Wed, 10 Aug 2022 14:39:27 +0200
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Some Raspberry Pi 400 boards, specifically rev 1.1, have a different address for the ethernet PHY device than what is provided by the kernel DTB. The correct address is provided by the firmware, so we should carry it over into the loaded device tree so that ethernet works on such boards.
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Signed-off-by: Antoine Mazeas <antoine@karthanis.net>
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---
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board/raspberrypi/rpi/rpi.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
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index 28b6f52506..793fd1aa30 100644
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--- a/board/raspberrypi/rpi/rpi.c
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+++ b/board/raspberrypi/rpi/rpi.c
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@@ -548,6 +548,9 @@ void update_fdt_from_fw(void *fdt, void *fw_fdt)
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/* kernel address randomisation seed as provided by the firmware */
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copy_property(fdt, fw_fdt, "/chosen", "kaslr-seed");
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+
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+ /* address of the PHY device as provided by the firmware */
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+ copy_property(fdt, fw_fdt, "ethernet0/mdio@e14/ethernet-phy@1", "reg");
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}
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int ft_board_setup(void *blob, struct bd_info *bd)
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