[PATCH v12 0/3] add the GPMI controller driver for IMX23/IMX28

Koen Beel koen.beel.barco at gmail.com
Fri Sep 9 15:56:57 EDT 2011


Tested-by: Koen Beel <koen.beel at barco.com>

On Thu, Sep 8, 2011 at 4:47 AM, Huang Shijie <b32955 at freescale.com> wrote:
> The patch set is based on Artem's tree:
>        http://git.infradead.org/users/dedekind/l2-mtd-2.6.git
>
> The general-purpose media interface(GPMI) controller is a flexible interface
> to up to several NAND flashs.
>
> The Bose Ray-Choudhury Hocquenghem(BCH) module is a hardware ECC accelerator.
>
> With the help of BCH, the GPMI controller can choose to do the hardware ECC or
> not.
>
> This driver is a _pure_ MTD NAND controller driver now.
>
>
> The driver depends on another GPMI-NAND device patch set, you can find them at :
>        [1] http://marc.info/?l=linux-arm-kernel&m=131416901319573&w=2
>        [2] http://marc.info/?l=linux-arm-kernel&m=131416912319668&w=2
>        [3] http://marc.info/?l=linux-arm-kernel&m=131416891119504&w=2
>        [4] http://marc.info/?l=linux-arm-kernel&m=131416896219539&w=2
>
> Test environment:
>        Using imx23 and imx28 boards for test.
>
>        imx23 :
>        console=ttyAMA0,115200 mtdparts=gpmi-nfc:20m(boot),-(user)
>        Tested by USB boot and NAND boot.
>
>        imx28 :
>        #console=ttyAMA0,115200 root=/dev/mmcblk0p3 rw rootwait
>        Tested by SD card boot mode.
>
> v11 --> v12:
>        [0] remove debug log level mechanism.
>        [1] replace BUG/BUG_ON() with pr_err()
>        [2] fix compiling warnings
>        [3] optimize the calculation of BCH's geometry.
>
> v10 --> v11:
>        [0] tiny fixes.
>        [1] optimize the calculation of BCH's geometry.
>        [2] renames
>
> v9 --> v10:
>        [0] fix DMA timeout bug by adding custom routine for reset blocks.
>        [1] remove mil{}
>        [2] add gpmi_hw_ecclayout.
>        [3] add ecc_write_oob() again to prohibit the mtd ioctl : MEMWRITEOOB
>        [4] change pr_info to dev_dbg() or pr_err().
>        [5] merge the all the dump functions into gpmi_dump_info().
>        [6] remove parse_mtd_partitions(), and use mtd_device_parse_register().
>        [7] move the the debug control code from gpmi-nand.h to gpmi-nand.c
>        [8] renames
>        [9] others
>
> v8 --> v9:
>        [0] remove the ONFI nand code, it will cause the DMA timeout in the ONFI nand.
>        [1] remove sysfs entry.
>        [2] remove kernel command parameter.
>        [3] report to ecclayout that we will use all the page + OOB.
>                remove the ->ecc_write_oob().
>        [4] add our own block_markbad() hook.
>        [5] rename some functions from mil_* to gpmi_*.
>        [6] replace the __raw_readl/__raw_writel to readl/writel.
>        [7] others
>
> v7 --> v8:
>        [0] rename the name from `GPMI-NFC` to `GPMI-NAND`
>        [1] remove the `hal` layer, and change it to function library.
>        [2] Do not use ~0 to initialize the DMA address.
>        [3] fix the issue : several DMA channels share the same IRQ.
>        [4] DMA timeout issue. I use the .config created by `make mxs_defconfig`
>            and the bug never occur. It seems some other module has impact to the
>            DMA.
>            Of course, you should enable the UBIFS,MTD_CHAR and GPMI for
>            the .config. You can also disable the SPIN-LOCK/MUTEX debug features.
>        [5] add function to print out the GPMI registers.
>        [6] others.
>
> v6 --> v7:
>        [0] remove the function wrapping the clock.
>        [1] use the module_param() for debugging.
>        [2] use the new interface of MTD partitions.
>                replace add_mtd_partitions() with mtd_device_register().
>        [3] use pr_info() to print log.
>        [4] add `__devinit` for some functions, etc.
>        [5] add `gpmi_nfc` to control the GPMI-NFC driver's initialization.
>        [6] others.
>
> v5 --> v6:
>        [0] split out the IMX23/IMX28 arch code to separate patches.
>        [1] fix bug : missing empty item in the end of platform_id array.
>        [2] inconsistent identation.
>        [3] others
>
> v4 --> v5:
>        [0] rename the files.
>        [1] fix PM bug
>        [2] remove the rom_helper code, and move the necessary initialization code
>                to the main file.
>        [3] change the macros from CPU_IS_* to GPMI_IS_*
>        [4] remove the default partition layout init code. revert back the
>                partition parsing command line code.
>        [5] others
>
> v3 --> v4:
>        [0] use the nand_ids{} as the nand database, drop my own database.
>        [1] remove the patch for DMA enginer, Shawn will submit his own version.
>        [2] use the platform_id to distinguish different Archs.
>        [3] fix the strange coding style.
>        [4] others.
>
> v2 --> v3:
>        [0] merge the imx23 and imx28 into one file(including the header file).
>        [1] remove the unuse registers in the headers.
>        [2] fix DMA bugs
>        [3] add bus width field to nand_attr{}
>        [4] others
>
> v1 --> v2:
>        [0] merge the common files into the gpmi-nfc-main.c
>        [1] change the code to get the clock.
>        [2] remove the timing in the nand_device_info{}
>        [3] fix DMA errors
>        [4] add the nand_device_info.[ch] to generic code
>        [5] use the chip->onfi_version for the ONFI nand
>        [6] useless init
>        [7] others
>
> Huang Shijie (3):
>  MTD : add the common code for GPMI-NAND controller driver
>  MTD : add helper functions library and header files for GPMI NAND
>    driver
>  MTD : add GPMI-NAND driver in the config and Makefile
>
>  drivers/mtd/nand/Kconfig               |   13 +
>  drivers/mtd/nand/Makefile              |    1 +
>  drivers/mtd/nand/gpmi-nand/Makefile    |    3 +
>  drivers/mtd/nand/gpmi-nand/bch-regs.h  |   84 ++
>  drivers/mtd/nand/gpmi-nand/gpmi-lib.c  | 1057 +++++++++++++++++++++
>  drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 1619 ++++++++++++++++++++++++++++++++
>  drivers/mtd/nand/gpmi-nand/gpmi-nand.h |  273 ++++++
>  drivers/mtd/nand/gpmi-nand/gpmi-regs.h |  172 ++++
>  8 files changed, 3222 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/mtd/nand/gpmi-nand/Makefile
>  create mode 100644 drivers/mtd/nand/gpmi-nand/bch-regs.h
>  create mode 100644 drivers/mtd/nand/gpmi-nand/gpmi-lib.c
>  create mode 100644 drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>  create mode 100644 drivers/mtd/nand/gpmi-nand/gpmi-nand.h
>  create mode 100644 drivers/mtd/nand/gpmi-nand/gpmi-regs.h
>
>
>
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>



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