[PATCH v4 00/13] Raspberry Pi 400/Compute Module 4 support

[Nicolas Saenz Julienne]

@Simon: I had to roll back all "if (CONFIG_IS_ENABLED(DM_DMA)" uses. As
per buildman it breaks compilation when !DM or !DM_DMA due to access to
undefined variables, namely dev and dev->dma_offset. I figure in u-boot
we root for small Image sizes, so defining the variables regarless of
them being needed is not an option.

---

This series could be split into at least two or even three parts, but I
kept it as is for now as it contains all the changes needed in order to
have u-boot working on the new Raspberry Pi 400 and Raspberry Pi Compute
Module 4.

There are core changes, specifically with regard to cpu to bus address
space translations. So far we had relied on hard-coded values but RPi
needs per device translations as it has at least three distinct bus
address spaces with different offsets. So it's a good opportunity to
implement bus translations the right way by parsing DT's dma-ranges.

Here's a more concrete example of what we're dealing with:

 - On a RPi4, SoC version BCM2711C0 with 8GB of memory

	[0x0 0x200000000]   [0x200000000 0x400000000]  [0xc0000000 0x100000000]  [0x00000000 0x100000000]
	 phys/cpu address       PCIe bus address           Legacy peripheral           emmc2 address
	     space                   space                   address space                space

 - On a RPi4, SoC version BCM2711C0 with 4GB of memory

	[0x0 0x100000000]   [0x100000000 0x200000000]  [0xc0000000 0x100000000]  [0x00000000 0x100000000]
	  phys/cpu address      PCIe bus address          Legacy peripheral            emmc2 address
	    space                  space                    address space                space

- On a RPi4, SoC version BCM2711B0 with 8GB of memory (bus can only access the
  lower 3GB of memory because of a SoC routing bug)

	[0x0 0x200000000]   [0x00000000 0xC0000000]   [0xc0000000 0x100000000]
	 phys/cpu address      PCIe bus address          Legacy peripheral
	    space                  space                   address space

---

Changes since v3:
 - Add commit "video: arm: rpi: Add brcm,bcm2711-hdmi0 compatible", it's
   pretty harmless
 - Get rid of non-device based phys2bus call in xhci & mmc
 - Simon's review changes in tests
 - Comment some of the APIs

Changes since v2:
 - Test builds not broken with buildman
 - Add tests to all DM changes
 - Make code conditional with config option
 - Correct OF refcount
 - Add config changes
 - Address small changes as per reviews

Changes since v1:
 - Fix some issues in 'dm: Introduce xxx_get_dma_range()'
 - Fix some typos in commit messages
 - Change DTB file name for RPi400
 - Address Matthias' comments

Nicolas Saenz Julienne (13):
  rpi: Add identifier for the new RPi400
  rpi: Add identifier for the new CM4
  pci: pcie-brcmstb: Fix inbound window configurations
  dm: Introduce xxx_get_dma_range()
  dm: test: Add test case for dev_get_dma_ranges()
  dm: Introduce DMA constraints into the core device model
  dm: test: Add test case for dev->dma_offset
  dm: Introduce dev_phys_to_bus()/dev_bus_to_phys()
  dm: test: Add test case for dev_phys_to_bus()/dev_bus_to_phys()
  xhci: translate virtual addresses into the bus's address space
  mmc: Introduce mmc_phys_to_bus()/mmc_bus_to_phys()
  configs: rpi4: Enable DM_DMA across all RPi4 configurations
  video: arm: rpi: Add brcm,bcm2711-hdmi0 compatible

 arch/sandbox/dts/test.dts          | 21 ++++++++
 board/raspberrypi/rpi/rpi.c        | 10 ++++
 common/fdt_support.c               | 73 ++++++++++++++++++++++++++++
 configs/rpi_4_32b_defconfig        |  1 +
 configs/rpi_4_defconfig            |  1 +
 configs/rpi_arm64_defconfig        |  1 +
 configs/sandbox64_defconfig        |  1 +
 configs/sandbox_defconfig          |  1 +
 configs/sandbox_flattree_defconfig |  1 +
 configs/sandbox_spl_defconfig      |  1 +
 drivers/core/Kconfig               | 10 ++++
 drivers/core/device.c              | 45 +++++++++++++++++
 drivers/core/of_addr.c             | 78 ++++++++++++++++++++++++++++++
 drivers/core/ofnode.c              |  9 ++++
 drivers/core/read.c                |  6 +++
 drivers/mmc/sdhci.c                |  7 +--
 drivers/pci/pcie_brcmstb.c         | 12 ++---
 drivers/usb/host/xhci-mem.c        | 45 +++++++++--------
 drivers/usb/host/xhci-ring.c       | 11 +++--
 drivers/usb/host/xhci.c            |  4 +-
 drivers/video/bcm2835.c            |  1 +
 include/dm/device.h                |  5 ++
 include/dm/of_addr.h               | 17 +++++++
 include/dm/ofnode.h                | 16 ++++++
 include/dm/read.h                  | 21 ++++++++
 include/fdt_support.h              | 14 ++++++
 include/mmc.h                      | 10 ++++
 include/phys2bus.h                 | 16 ++++++
 include/usb/xhci.h                 | 22 ++++++++-
 test/dm/Makefile                   |  2 +
 test/dm/core.c                     | 30 ++++++++++++
 test/dm/phys2bus.c                 | 37 ++++++++++++++
 test/dm/read.c                     | 49 +++++++++++++++++++
 33 files changed, 540 insertions(+), 38 deletions(-)
 create mode 100644 test/dm/phys2bus.c
 create mode 100644 test/dm/read.c

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2.29.2