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path: root/drivers/mtd/nand/sunxi_nand_spl.c
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* spl: nand: sunxi: add support for NAND config auto-detectionBoris Brezillon2016-06-19-58/+204
| | | | | | | | | | | | | | | NAND chips are supposed to expose their capabilities through advanced mechanisms like READID, ONFI or JEDEC parameter tables. While those methods are appropriate for the bootloader itself, it's way to complicated and takes too much space to fit in the SPL. Replace those mechanisms by a dumb 'trial and error' mechanism. With this new approach we can get rid of the fixed config list that was used in the sunxi NAND SPL driver. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* spl: nand: sunxi: split 'load page' and 'read page' logicBoris Brezillon2016-06-19-71/+114
| | | | | | | | | | | | | | | Split the 'load page' and 'read page' logic in 2 different functions so we can later load the page and test different ECC configs without the penalty of reloading the same page in the NAND cache. We also move common setup to a dedicated function (nand_apply_config()) to avoid rewriting the same values in NFC registers each time we read a page. These new functions are passed a pointer to an nfc_config struct to limit the number of parameters. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* spl: nand: sunxi: rework status polling loopBoris Brezillon2016-06-19-16/+13
| | | | | | | | | | | | | | | check_value_xxx() helpers are using a 1ms delay between each test, which can be quite long for some operations (like a page read on an SLC NAND). Since we don't have anything to do but to poll this register, reduce the delay between each test to 1us. While we're at it, rename the max_number_of_retries parameters and the MAX_RETRIES macro into timeout_us and DEFAULT_TIMEOUT_US to reflect that we're actually waiting a given amount of time and not only a number of retries. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* spl: nand: sunxi: stop guessing the redundant u-boot offsetBoris Brezillon2016-06-19-20/+0
| | | | | | | | | | | | Use CONFIG_SYS_NAND_U_BOOT_OFFS_REDUND value instead of trying to guess where the redundant u-boot image is based on simple (and most of the time erroneous) heuristics. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com> # Conflicts: # drivers/mtd/nand/sunxi_nand_spl.c
* spl: nand: sunxi: remove support for so-called 'syndrome' modeBoris Brezillon2016-06-19-42/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | The sunxi SPL NAND controller driver supports use 'BootROM'-like configs, that is, configs where the ECC bytes and real data are interleaved in the page instead of putting ECC bytes in the OOB area. Doing that has several drawbacks: - since you're interleaving data and ECC bytes you can't use the whole page otherwise you might override the bad block marker with non-FF bytes. - to solve the bad block marker problem, the ROM code supports partially using the page, but this introduces a huge penalty both in term of read speed and NAND memory usage. While this is fine for rather small binaries(like the SPL one which is at maximum 24KB large), it becomes non-negligible for the bootloader image (several hundred of KB). - auto-detection of the page size is not reliable (this is in my opinion the biggest problem). If you get the page size wrong, you'll end up reading data at a different offset than what was specified by the caller and the reading may succeed (if valid data were written at this address). For all those reasons I think it's wiser to completely remove support for 'syndrome' configs. If we ever need to support it again, then I'd recommend specifying all the config parameters through Kconfig options. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* sunxi_nand_spl: Be smarter about where to look for backup u-boot.binHans de Goede2015-09-29-6/+20
| | | | | | | | | | | | | | | | | | We know when u-boot is written to its own partition, in this case the layout always is: eb 0 spl eb 1 spl-backup eb 2 u-boot eb 3 u-boot-backup eb: erase-block So if we cannot load u-boot from its primary offset we know exactly where to look for it. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Add config parameter for 4KiB page sized NAND devicesStefan Roese2015-09-10-0/+1
| | | | | | | | | | This patch adds support for NAND chips with 4KiB page size and 24/1024 ECC strength. Like the Micron MT29F32G08CBACAWP which is used on the ICnova-A20 SoM. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* sunxi_nand_spl: clear status flags in SPL implementationBoris Brezillon2015-08-31-3/+8
| | | | | | | | | | | Some status flags remain set until you explicetly clear the bit in the status register. Fix the SPL implementation to avoid false positive. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [hdegoede@redhat.com: Port from v2015.07 to v2015.10] Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* sunxi_nand_spl: Remove NAND_SUNXI_SPL_SYNDROME_PARTITIONS_ENDHans de Goede2015-08-31-2/+6
| | | | | | | | | | | | | | | | | We only ever use syndrome mode for the partitions which contain the SPL, as that is required for the BROM to be able to read the SPL. Instead of using some arbritray limit for deciding whether or not to use syndrome, be smart and check if u-boot-dtb.bin is directly behind the SPL, if it is not then it is on its own partition and we should not use syndrome. Note the reason why we only use syndrome mode for the SPL is because it comeswith weaker randomization, introducing a risk for more bit errors, so we want to avoid it when possible. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Add support for backup boot partitionsHans de Goede2015-08-31-0/+16
| | | | | | | | | | | | | The BROM does not care / use bad page markings, instead it deals with any bad pages in the first erase-block by simply trying to load "boot0" from the next erase-block. This commit implements the same strategy for the sunxi spl nand code, allowing it to boot from the backup boot partition when the main boot partition is bad (tested by erasing the main boot partition). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Auto detect nand configuration parametersHans de Goede2015-08-31-4/+39
| | | | | | | | | | | | | | | | | | | Auto detect the nand configuration parameters, like the BROM does. This allows us to get rid of various Kconfig settings, and is necessary to support generic boards like the mk802 which have seen many production runs with different nands. The full blown u-boot/kernel nand driver uses the nand id to determine this info, for the SPL we do as the BROM does and simply try a few standard configs. Note the table only contains configs which are known to actually be used, rather then all the configs the BROM tries. This means that it may need to be updated in the future as we add support for nand on more boards. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Parametrize lowlevel read functionsHans de Goede2015-08-31-38/+48
| | | | | | | | | | | | Parametrize the lowlevel nand_read_page function, instead of directly using the CONFIG_foo settings for page-size, etc. there and add a few wrappers / helper functions for calling it. This is a preparation patch for adding auto-detecting of the nand parameters like the BROM does. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Properly config page-size in the nand ctl registerHans de Goede2015-08-31-0/+5
| | | | | | | | | Properly config page-size in the nand ctl register, it seems that things work fine without doing this, but still lets play it safe and properly set the page-size. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Use kernel driver algorithm for determining ecc_mode / _offHans de Goede2015-08-31-46/+12
| | | | | | | | | Sync the code for figuring out the ecc_mode and ecc_offset with the linux kernel v4.1. Keeping this in sync seems like a good idea in general, and it fixes / adds support for ecc strengths of 56, 60 and 64 bits. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Add proper cache flusingHans de Goede2015-08-31-0/+8
| | | | | | | | | | We are using dma, so we should flush the cache before starting the dma, and invalidate it once the dma is done. Things are working without this by mostly luck, but lets not rely on that. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Turn off clocks when we're done with the nandHans de Goede2015-08-31-2/+15
| | | | | | | | | | | | Turn off the nand and dma clocks when we're done with the nand, this puts the nand and dma controllers back into a clean state for when the kernel boots. Without this the kernel will not boot properly when it is built with dma-controller support. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Use SYS_NAND_SELF_INIT and only do nand init when necessaryHans de Goede2015-08-31-0/+2
| | | | | | | | Use SYS_NAND_SELF_INIT and only setup the pinmux and clocks when we are actually using the nand. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Do not bother writing the spare-area reg in syndrome modeHans de Goede2015-08-31-4/+1
| | | | | | | | | | | | In syndrome mode we set the NFC_SEQ bit in the command register, so the spare-area register is not used. Also the value currently being written is actual wrong, the ecc sits at "column + CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE" not just CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE. So the current code only serves to confuse the user -> remove it. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: We only need to reset the nand chip onceHans de Goede2015-08-31-10/+10
| | | | | | | There is no need to reset the nand chip for every ecc-block read. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi_nand_spl: Drop unnecessary temp bufHans de Goede2015-08-31-27/+8
| | | | | | | | | | | | | | | | | nand_spl_load_image() always gets called with either CONFIG_SYS_TEXT_BASE or spl_image.load_addr as destination, both of which are properly aligened, and have plenty of space for "overshooting" up to CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE bytes, as we read in CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE bytes chunks. This saves CONFIG_NAND_SUNXI_SPL_ECC_PAGE_SIZE (typically 1k) in SPL size, which is a lot on the total 24k we have. Note this changes the dma destination from SRAM to DRAM, so this patch updates the DDMA_DST_TYPE bits in the dma controller cfg0 reg accordingly. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
* sunxi: nand: Add basic sunxi NAND driver for SPL with DMA supportPiotr Zierhoffer2015-08-08-0/+353
| | | | | | | | | | | | | This driver adds NAND support to SPL. It was tested on Allwinner A20. Signed-off-by: Peter Gielda <pgielda@antmicro.com> Signed-off-by: Tomasz Gorochowik <tgorochowik@antmicro.com> Signed-off-by: Mateusz Holenko <mholenko@antmicro.com> Signed-off-by: Piotr Zierhoffer <pzierhoffer@antmicro.com> Signed-off-by: Karol Gugala <kgugala@antmicro.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* Revert "sunxi/nand: Add support to the SPL for loading u-boot from internal ↵Ian Campbell2015-06-28-273/+0
| | | | | | | | | | | | | | NAND memory" This reverts commit f76eba38b3eda905ff3bdc18dd1240d3dcbc6e5a. This patch did not have a full and proper copyright/S-o-b chain. Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Conflicts: include/configs/sun6i.h include/configs/sun8i.h
* sunxi/nand: Add support to the SPL for loading u-boot from internal NAND memoryDaniel Kochmański2015-05-29-0/+273
This commit adds support to the sunxi SPL to load u-boot from the internal NAND. Note this only adds support to access the boot partitions to load u-boot, full NAND support to load the kernel, etc. from the nand data partition will come later. Signed-off-by: Roy Spliet <r.spliet@ultimaker.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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