- 24 Mar, 2017 8 commits
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Masahiro Yamada authored
The Denali NAND controller IP has various customizable features. SoC vendors can choose desired functions when a delivery RTL is created. It means there are several variants for this IP. For example, the Intel version is equipped with 32bit DMA, whereas the IP for UniPhier SoC family with 64bit DMA. This driver was originally written for some Intel platforms with Intel specific things hard-coded. What is worse, the revision register of this IP does not work to distinguish such features. We need to do something to make the driver available for other SoCs. Let's introduce a caps member to the denali_nand_info structure to switch on/off various features. Also, add struct denali_dt_data to store the capability associated with compatible string. Boris suggested this approach in discussion [1] instead of a new DT property for every feature. [1] https://lkml.org/lkml/2016/3/29/142Signed-off-by:
Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by:
Boris Brezillon <boris.brezillon@free-electrons.com>
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Masahiro Yamada authored
The interrupts are enabled by INTR_EN register, then asserted interrupts can be observed via INTR_STATUS register. The bit fields are identical between INTR_EN and INTR_STATUS, so we can merge the bit field macros. Likewise for DATA_INTR. Signed-off-by:
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Masahiro Yamada authored
The same comment "Mapped io reg base address" for flash_reg and flash_mem probably due to the mistake of copy-paste work. Of course, the latter is not the register base address. Reword the comments using the terminology in the Denali User's Guide. Signed-off-by:
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Masahiro Yamada authored
These members are not used at all. Signed-off-by:
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Masahiro Yamada authored
This macro is defined twice in denali.c (around line 98 and line 651), so remove the second one. Signed-off-by:
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Masahiro Yamada authored
All of these macros are not used at all. CONFIG_MTD_NAND_DENALI_SCRATCH_REG_ADDR is not used for anything but defining SCRATCH_REG_ADDR. The config option should go away as well. I am removing some register macros. They are not used, and do not exist in recent IP versions. Signed-off-by:
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Masahiro Yamada authored
The nand_default_block_markbad() and scan_block_fast() use high level APIs to get access to the BBM. On the other hand, nand_block_bad (the default implementation of ->block_bad) calls the lower level ->cmdfunc hook. This prevents drivers from using ->ecc.read_oob() even if optimized read operation is implemented. Besides, some NAND controllers may protect the BBM with ECC. Signed-off-by:
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Masahiro Yamada authored
Currently, it is valid to specify both "nand-ecc-step-size" and "nand-ecc-strength", but not allowed to set only one of them. This requirement has a conflict with "nand-ecc-maximize"; this flag is used when you want the driver to choose the best ECC strength. If "nand-ecc-maximize" is set, "nand-ecc-strength" is very likely to be unset. It would be possible to make the if-conditional more complex by adding the check for the NAND_ECC_MAXIMIZE flag, but I chose to drop the check entirely. I thought of the situation where the hardware has a fixed ECC step size (so it can be hard-coded in the driver), whereas the ECC strength is configurable by software. In that case, we may want to only set "nand-ecc-strength" (or "nand-ecc-maximize") in DT. Signed-off-by:
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- 23 Mar, 2017 12 commits
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Thomas Petazzoni authored
Since commit 4404d7d8 ("mtd: nand: fsmc: remove stale non-DT probe path"), the fsmc NAND driver only supports Device Tree probing, and therefore has a "depends on OF" in its Kconfig option. Due to this the #ifdef CONFIG_OF ... #endif condition in the driver code is no longer necessary. Signed-off-by:
Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Thomas Petazzoni authored
These definitions are not used anywhere in the driver, so remove them. Signed-off-by:
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Thomas Petazzoni authored
This commit switches the fsmc_nand driver from clk_get() to devm_clk_get(), which saves a few clk_put(). Signed-off-by:
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Thomas Petazzoni authored
Since the driver now only supports DT probing, it doesn't make a lot of sense to have a private data structure called platform_data, fill it in with information coming from the DT, and then copying this into the driver-specific structure fsmc_nand_data. So instead, we remove fsmc_nand_platform_data entirely, and have fsmc_nand_probe_config_dt() fill in the fsmc_nand_data structure directly. This requires calling fsmc_nand_probe_config_dt() after fsmc_nand_data has been allocated instead of before. Also, as an added bonus, we now propagate properly the return value of fsmc_nand_probe_config_dt() instead of returning -ENODEV on failure. The error message is also removed, since it no longer made any sense. Signed-off-by:
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Thomas Petazzoni authored
It is already done a few lines before. Signed-off-by:
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Thomas Petazzoni authored
The ->partitions and ->nr_partitions fields of struct fsmc_nand_platform_data are never set anywhere, so they are always NULL/0. The corresponding fields in 'struct fsmc_nand_data' are set to the value of the same fields in fsmc_nand_platform_data, i.e NULL/0. Therefore, we remove those two fields, and pass NULL/0 directly to mtd_device_register(), like many other NAND drivers already do. At the same time, we remove the comment about the fact that we pass partition info, since we are no longer doing this. Signed-off-by:
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Thomas Petazzoni authored
The read_dma_priv and write_dma_priv fields of fsmc_nand_platform_data are never set, so this commit removes them. Signed-off-by:
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Thomas Petazzoni authored
host->select_chip used to point to the ->select_bank() function provided by the platform data, but the latter no longer exists. Therefore host->select_chip is always NULL. Due to this, the fsmc_select_chip() does nothing, except: chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); when chipnr is -1, which is exactly what the default implementation of ->select_chip() does in the NAND framework. So, this commit kills fsmc_select_chip() entirely. Signed-off-by:
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Thomas Petazzoni authored
Since commit 4404d7d8 ("mtd: nand: fsmc: remove stale non-DT probe path"), only DT probing is used for the fsmc_nand driver. Due to this, the ->select_bank() field of fsmc_nand_platform_data is never used, so this commit gets rid of it. Signed-off-by:
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Thomas Petazzoni authored
This commit simply moves the "struct fsmc_nand_data" definition to be towards the beginning of the file, with the other defines and type definitions, instead of in the middle of the driver code. This is much more consistent with what most Linux drivers do. Signed-off-by:
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Thomas Petazzoni authored
In commit eea62819 ("mtd: Add device-tree support to fsmc_nand"), Device Tree support was added to the fmsc_nand driver. However, this code has a bug in how it handles the bank-width DT property to set the bus width. Indeed, in the function fsmc_nand_probe_config_dt() that parses the Device Tree, it sets pdata->width to either 8 or 16 depending on the value of the bank-width DT property. Then, the ->probe() function will test if pdata->width is equal to FSMC_NAND_BW16 (which is 2) to set NAND_BUSWIDTH_16 in nand->options. Therefore, with the DT probing, this condition will never match. This commit fixes that by removing the "width" field from fsmc_nand_platform_data and instead have the fsmc_nand_probe_config_dt() function directly set the appropriate nand->options value. It is worth mentioning that if this commit gets backported to older kernels, prior to the drop of non-DT probing, then non-DT probing will be broken because nand->options will no longer be set to NAND_BUSWIDTH_16. Fixes: eea62819 ("mtd: Add device-tree support to fsmc_nand") Signed-off-by:
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Dan Carpenter authored
We should be return -ENOMEM instead of success. Fixes: 626994e0 ("mtd: nand: hynix: Add read-retry support for 1x nm MLC NANDs") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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- 16 Mar, 2017 6 commits
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Christophe Leroy authored
On some hardware, the nCE signal is wired to the ChipSelect associated to bus address of the NAND, so it is automatically driven during the memory access and it is not managed by a GPIO. Signed-off-by:
Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by:
Marek Vasut <marek.vasut@gmail.com> Signed-off-by:
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Alison Wang authored
As NAND support for Freescale/NXP IFC controller is available on LS1021A, the dependency for LS1021A is added. LS1021A is an earlier product and is not compatible with later LayerScape architecture. So ARCH_LAYERSCAPE can't cover LS1021A. Signed-off-by:
Alison Wang <alison.wang@nxp.com> Signed-off-by:
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Alison Wang authored
As Freescale/NXP IFC controller is available on LS1021A, the dependency for LS1021A is added. LS1021A is an earlier product and is not compatible with later LayerScape architecture. So ARCH_LAYERSCAPE can't cover LS1021A. Signed-off-by:
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Boris Brezillon authored
do_dma() uses an int to pass the DMA data direction information and pass the same value to dmaengine_prep_slave_sg(). Currently, DMA_{FROM,TO}_DEVICE match DMA_{DEV_TO_MEM,MEM_TO_DEV} definitions so it works fine, but assuming this will always be the case is not safe. Enforce enum dma_data_direction type in the function prototype and make the enum dma_data_direction -> enum dma_transfer_direction conversion explicit. Reported-by:Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
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Colin Ian King authored
trivial fix to spelling mistake in NS_ERR error message Signed-off-by:
Colin Ian King <colin.king@canonical.com> Acked-by:
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Philipp Zabel authored
As of commit bb475230 ("reset: make optional functions really optional"), the reset framework API calls use NULL pointers to describe optional, non-present reset controls. This allows to return errors from devm_reset_control_get_optional and to call reset_control_(de)assert unconditionally. Signed-off-by:
Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by:
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- 08 Mar, 2017 14 commits
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Boris Brezillon authored
All Hynix MLC NANDs produced with the 1x nm process support read-retry. This read retry implementation should also be re-usable for other Hynix NANDs, but the method to retrieve the read-retry parameters from the read-retry OTP area might change a bit (some NANDs are even using a fixed set of values instead of retrieving those information from the OTP area). Signed-off-by:
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Boris Brezillon authored
The current NAND ID detection in nand_hynix.c is not handling the different scheme used by Hynix, thus forcing developers to add new entry to the nand_ids table each time they want to support a new MLC NAND. Enhance the detection logic to handle all known formats. This does not necessarily mean we are handling all the cases, but if new formats are discovered, the code should evolve to take them into account instead of adding more full-id entries to the nand_ids table. Signed-off-by:
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Hans de Goede authored
On some nand controllers with hw-ecc the controller code wants to know the ecc strength and size and having these as 0, 0 is not accepted. Specifying these in devicetree is possible but undesirable as the nand may be different in different production runs of the same board, so it is better to get this info from the nand id where possible. This commit adds code to read the ecc strength and size from the nand for Samsung extended-id nands. This code is based on the info for the 5th id byte in the datasheets for the following Samsung nands: K9GAG08U0E, K9GAG08U0F, K9GAG08X0D, K9GBG08U0A, K9GBG08U0B. These all use these bits in the exact same way. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Acked-by:
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Boris Brezillon authored
Move Macronix specific initialization logic into nand_macronix.c. This is part of the "separate vendor specific code from core" cleanup process. Signed-off-by: -
Boris Brezillon authored
Move AMD/Spansion specific initialization/detection logic into nand_amd.c. This is part of the "separate vendor specific code from core" cleanup process. Signed-off-by:
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Boris Brezillon authored
Move Micron specific initialization logic into nand_micron.c. This is part of the "separate vendor specific code from core" cleanup process. Signed-off-by:
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Boris Brezillon authored
Move Toshiba specific initialization and detection logic into nand_toshiba.c. This is part of the "separate vendor specific code from core" cleanup process. Signed-off-by:
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Boris Brezillon authored
Move Hynix specific initialization and detection logic into nand_hynix.c. This is part of the "separate vendor specific code from core" cleanup process. Signed-off-by:
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Boris Brezillon authored
Move Samsung specific initialization and detection logic into nand_samsung.c. This is part of the "separate vendor specific code from core" cleanup process. Signed-off-by:
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Boris Brezillon authored
A lot of NANDs are implementing generic features in a non-generic way, or are providing advanced auto-detection logic where the NAND ID bytes meaning changes with the NAND generation. Providing this vendor specific initialization step will allow us to get rid of full-id entries in the nand_ids table or all the vendor specific cases added over the time in the generic NAND ID decoding logic. Signed-off-by: -
Boris Brezillon authored
There is no reason to expose the NAND manufacturer table. Provide an helper function to find manufacturers by their id. We also turn the nand_manufacturers table into a const array, since its members are not modified after the initial assignment. Finally, we remove the sentinel manufacturer entry from the manufacturers table (we already have the array size information given by ARRAY_SIZE()), and add the nand_manufacturer_name() helper to handle the "Unknown" case properly. Signed-off-by: -
Boris Brezillon authored
MTD_NAND_IDS is selected by MTD_NAND, which makes it useless. Remove the Kconfig option and link nand_ids.o into the nand.o object file. Doing that also prevents creating an extra nand_ids.ko module when MTD_NAND is activated as a module. Since nand_ids.c is no longer compiled as a standalone module and the nand_manuf_ids/nand_flash_ids symbols are only used in nand_base.c, we can get rid of the MODULE_XXX() and EXPORT_SYMBOL() definitions. Signed-off-by: -
Boris Brezillon authored
Drop the 's' at the end of nand_manufacturers since the struct is actually describing a single manufacturer, not a manufacturer table. Signed-off-by: -
Boris Brezillon authored
Since commit 4722c0e9 ("mtd: nand: change return type of nand_get_flash_type() to int"), nand_get_flash_type() no longer returns a nand_flash_dev object. Rename the function to match this new behavior. Signed-off-by:
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