From mboxrd@z Thu Jan 1 00:00:00 1970 From: b32955@freescale.com (Huang Shijie) Date: Thu, 21 Jul 2011 14:47:23 +0800 Subject: [PATCH v8 0/3] add the GPMI controller driver for IMX23/IMX28 Message-ID: <1311230846-26437-1-git-send-email-b32955@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The patch is based on branch "imx-for-3.1" of tree : git://git.pengutronix.de/git/imx/linux-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. To Walfram & Artem: About how to disable the JFFS2 to use the OOB: I read the code, and I still have no idea about how to use the ecclayout to do the job. Could you give me some hint? thanks. The driver depends on another GPMI-NAND device patch set, you can find them at : [1] http://lists.infradead.org/pipermail/linux-mtd/2011-July/037033.html [2] http://lists.infradead.org/pipermail/linux-mtd/2011-July/037031.html [3] http://lists.infradead.org/pipermail/linux-mtd/2011-July/037032.html [4] http://lists.infradead.org/pipermail/linux-mtd/2011-July/037034.html The driver also depends on another DMA patch by Shawn: [0] http://lists.infradead.org/pipermail/linux-mtd/2011-June/036820.html Test environment: Using imx23 and imx28 boards for test. imx23 (burn the rootfs to NAND): console=ttyAMA0,115200 mtdparts=gpmi-nfc:20m(boot),-(user) ubi.mtd=1 root=ubi0:rootfs0 rootfstype=ubifs gpmi_debug_init imx28 : #console=ttyAMA0,115200 root=/dev/mmcblk0p3 rw rootwait gpmi_debug_init #console=ttyAMA0,115200 root=/dev/nfs ip=:::::eth0:dhcp nfsroot=10.192.242.11:/root/nfs_root/imx28 gpmi_debug_init 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 | 11 + drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/gpmi-nand/Makefile | 3 + drivers/mtd/nand/gpmi-nand/bch-regs.h | 88 ++ drivers/mtd/nand/gpmi-nand/gpmi-lib.c | 978 ++++++++++++++++ drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 1987 ++++++++++++++++++++++++++++++++ drivers/mtd/nand/gpmi-nand/gpmi-nand.h | 390 +++++++ drivers/mtd/nand/gpmi-nand/gpmi-regs.h | 174 +++ 8 files changed, 3632 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