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SubjectRe: [PATCH v3 00/37] mtd: nand: denali: 2nd round of Denali NAND IP patch bomb
On Thu, 30 Mar 2017 15:45:46 +0900
Masahiro Yamada <yamada.masahiro@socionext.com> wrote:

> This driver includes many problems.
>
> One of the biggest one is a bunch of hard-coded parameters. This IP
> has many parameters that can be customized when a delivery RTL is
> generated. However, this driver was upstreamed by Intel, with
> Intel parameters hard-coded. Later, Altera added denali_dt.c to use
> this driver for embedded boards, but they did not fix the code in
> denali.c So, this driver has never worked. Even some DT bindings
> actually turned out wrong.
>
> There are more problems: [1] The driver just retrieves the OOB area as-is
> whereas the controller uses syndrome page layout. [2] Many NAND chip
> specific parameters are hard-coded in the driver. [3] ONFi devices are
> not working [4] It can not read Bad Block Marker
>
> This patch series intends to solve those problems.
>
> Outstanding changes are:
> - Fix raw/oob callbacks for syndrome page layout
> - Implement setup_data_interface() callback
> - Fix/implement more commands for ONFi devices
> - Allow to skip the driver internal bounce buffer
> - Support PIO in case DMA is not supported
> - Switch from ->cmdfunc over to ->cmd_ctrl
>
> 18 patches were merged at v2.
> Here is the rest of the series.
>
> v1: https://lkml.org/lkml/2016/11/26/144
> v2: https://lkml.org/lkml/2017/3/22/804
>
>
> Masahiro Yamada (37):
> mtd: nand: relax ecc.read_page() return value for uncorrectable ECC
> mtd: nand: denali: allow to override mtd->name from label DT property
> mtd: nand: denali: remove meaningless pipeline read-ahead operation
> mtd: nand: denali: fix bitflips calculation in handle_ecc()
> mtd: nand: denali: fix erased page checking
> mtd: nand: denali: support HW_ECC_FIXUP capability
> mtd: nand: denali_dt: enable HW_ECC_FIXUP for Altera SOCFPGA variant
> mtd: nand: denali: support 64bit capable DMA engine
> mtd: nand: denali_dt: remove dma-mask DT property
> mtd: nand: denali_dt: use pdev instead of ofdev for platform_device
> mtd: nand: denali: allow to override revision number

Applied patches 1 to 11.

> mtd: nand: denali: support 1024 byte ECC step size
> mtd: nand: denali: avoid hard-coding ecc.strength and ecc.bytes
> mtd: nand: denali: support "nand-ecc-strength" DT property
> mtd: nand: denali: remove Toshiba and Hynix specific fixup code
> mtd: nand: denali_dt: add compatible strings for UniPhier SoC variants
> mtd: nand: denali: set NAND_ECC_CUSTOM_PAGE_ACCESS
> mtd: nand: denali: do not propagate NAND_STATUS_FAIL to waitfunc()
> mtd: nand: denali: use BIT() and GENMASK() for register macros
> mtd: nand: denali: remove unneeded find_valid_banks()
> mtd: nand: denali: handle timing parameters by setup_data_interface()
> mtd: nand: denali: rework interrupt handling
> mtd: nand: denali: fix NAND_CMD_STATUS handling
> mtd: nand: denali: fix NAND_CMD_PARAM handling
> mtd: nand: denali: switch over to cmd_ctrl instead of cmdfunc
> mtd: nand: denali: fix bank reset function
> mtd: nand: denali: use interrupt instead of polling for bank reset
> mtd: nand: denali: propagate page to helpers via function argument
> mtd: nand: denali: merge struct nand_buf into struct denali_nand_info
> mtd: nand: denali: use flag instead of register macro for direction
> mtd: nand: denali: fix raw and oob accessors for syndrome page layout
> mtd: nand: denali: support hardware-assisted erased page detection
> mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset
> mtd: nand: allow drivers to request minimum alignment for passed
> buffer
> mtd: nand: denali: skip driver internal bounce buffer when possible
> mtd: nand: denali: use non-managed kmalloc() for DMA buffer
> mtd: nand: denali: enable bad block table scan

The rest looks almost good, except for a few comments I had on patch
14, 18, 25, 26 and 32.

I'll probably apply 33 and 34 soon.

>
> .../devicetree/bindings/mtd/denali-nand.txt | 24 +-
> drivers/mtd/nand/denali.c | 1971 ++++++++++----------
> drivers/mtd/nand/denali.h | 308 +--
> drivers/mtd/nand/denali_dt.c | 90 +-
> drivers/mtd/nand/denali_pci.c | 10 +-
> drivers/mtd/nand/nand_base.c | 49 +-
> include/linux/mtd/nand.h | 4 +-
> 7 files changed, 1234 insertions(+), 1222 deletions(-)
>

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