u-boot.git/arch/mips, branch v2020.07-rc2

mips: Add support for SoM "VoCore2".

2020-04-27T18:30:14Z

Small patch to add support for VoCore/VoCore2 board. VoCore is open hardware and runs OpenWrt/LEDE. It has WIFI, USB, UART, 20+ GPIOs but is only one inch square. It will help you to make a smart house, study embedded system or even make the tiniest router in the world. Details about this SoM can be found at "https://vocore.io/v2.html". Signed-off-by: Mauro Condarelli Reviewed-by: Stefan Roese

mips: mt76x8: ddr_cal: Correct dqs_find_min/max implementations

2020-04-27T18:30:13Z

The current implementations have some issues detecting the correct values: dqs_find_max() will return "last passing fieldval + 1" instead of "last passing fieldval". Also it will return "maxval + 1" in the case that all fieldvals are tested valid (without error). dqs_find_min() will not test the "lowest" value because of using ">" instead of ">=". This patch now rewrites these functions to fix those issues. Also, this patch uses the same approach of a for loop in both functions making it easier to read and maintain. Since the variables are integers now, we can use min()/max(), which handles the wrap around case for fieldval=0: return (0 - 1). Signed-off-by: Stefan Roese Cc: Weijie Gao Cc: Daniel Schwierzeck Reviewed-by: Weijie Gao

mips: mt76x8: ddr_cal: Change types from u32 to int in dqs_find_min/max

2020-04-27T18:30:13Z

This change is made to enable comparison of integer variables, which might be negative in the next patch. No functional change is intended in this patch. Signed-off-by: Stefan Roese Cc: Weijie Gao Cc: Daniel Schwierzeck Reviewed-by: Weijie Gao

mips: mt76x8: ddr_cal: Rename dqs_test_valid() to dqs_test_error()

2020-04-27T18:30:13Z

This function returns "-1" (true) upon error. So the function name does not match its implementation which is confusing. This patch renames the function to dqs_test_error() which makes the code easier to read. Also change the return type to bool and return "true" or "false". Signed-off-by: Stefan Roese Cc: Weijie Gao Cc: Daniel Schwierzeck Reviewed-by: Weijie Gao

mips: mtmips: add support for mt7628-rfb

2020-04-27T18:30:13Z

This patch adds support for mt7628 reference board. SPL_DM and DT are not enabled for SPL to save about 17KiB for u-boot-spl.bin. Reviewed-by: Stefan Roese Signed-off-by: Weijie Gao

mips: mtmips: enable SPL for all boards

2020-04-27T18:30:13Z

This patch enables SPL for all mtmips boards. And also remove defconfig files which are intend to build ram bootable u-boot files. SPL_DM and OF_CONTROL are enabled for both boards. Reviewed-by: Stefan Roese Signed-off-by: Weijie Gao

mips: mtmips: add SPL support

2020-04-27T18:30:12Z

This patch adds SPL support for mtmips platform. The lowlevel architecture is split into SPL and the rest parts are built into a memory loadable u-boot image. Optional SPL_DM and OF_CONTROL are also supported. The increment of size is very small (< 10 KiB) if SPL_DM and OF_CONTROL are not enabled and the memory bootable u-boot (u-boot.img) is generated automatically so there is not need to add a separate config for it. A lzma compressed payload (u-boot-lzma.img) is also generated and it will be combined with u-boot-spl.bin to form the unified ROM bootable binary u-boot-mtmips.bin. A spl loader is added to support uncompress the payload. Reviewed-by: Stefan Roese Signed-off-by: Weijie Gao

mips: mtmips: rewrite lowlevel codes of mt7628

2020-04-27T18:29:33Z

This patch rewrites the mtmips architecture with the following changes: 1. Move MT7628 soc parts into a subfolder. 2. Lock parts of D-Cache as temporary stack. 3. Reimplement DDR initialization in C language. 4. Reimplement DDR calibration in a clear logic. 5. Add full support for auto size detection for DDR1 and DDR2. 6. Use accurate CPU clock depending on the input xtal frequency for timer and delay functions. Note: print_cpuinfo() has incompatible parts with MT7620 so it's moved into mt7628 subfolder. Reviewed-by: Stefan Roese Reviewed-by: Daniel Schwierzeck Signed-off-by: Weijie Gao

mips: add a option to support not reserving malloc space on initial stack

2020-04-27T18:29:33Z

The initial stack on some platforms is too small to hold a large malloc space. This patch adds a option to allow these platforms not reserving the malloc space on initial stack. These platforms should set the malloc base after DRAM is usable. Reviewed-by: Stefan Roese Signed-off-by: Weijie Gao

mips: add an option to support initialize SRAM for initial stack

2020-04-27T18:29:33Z

Currently CONFIG_MIPS_INIT_STACK_IN_SRAM assumes the memory space for the initial stack can be used directly. However on some platform the SRAM needs initialization, e.g. lock cache. This patch adds an option to allow a new function mips_sram_init() being called before setup_stack_gd. Reviewed-by: Daniel Schwierzeck Reviewed-by: Stefan Roese Signed-off-by: Weijie Gao