[PATCH v12 0/3] add the GPMI controller driver for IMX23/IMX28
Huang Shijie
b32955 at freescale.com
Wed Sep 7 22:47:08 EDT 2011
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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