user/sven/linux.git/include/linux/mtd, branch v3.14.79

mtd: mtdram: add missing 'const'

2014-01-20T19:55:23Z

mtdram_init_device() wasn't updated along with mtd_partition.name. Signed-off-by: Brian Norris Cc: Geert Uytterhoeven

mtd: nand: add Intel manufacturer ID

2014-01-20T19:30:52Z

Add the Intel manufacturer Id. Tested with Intel JS29F32G08ACMD1(4096 + 224) which is ONFI 2.0 compliant nand. Signed-off-by: Huang Shijie Signed-off-by: Brian Norris

mtd: nand: add SanDisk manufacturer ID

2014-01-20T19:23:28Z

Add the manufactor ID for SanDisk. Make preparation for SanDisk SDTNRGAMA-008G. Signed-off-by: Huang Shijie Signed-off-by: Brian Norris

mtd: nand: don't use {read,write}_buf for 8-bit transfers

2014-01-15T01:22:37Z

According to the Open NAND Flash Interface Specification (ONFI) Revision 3.1 "Parameters are always transferred on the lower 8-bits of the data bus." for the Get Features and Set Features commands. So using read_buf and write_buf is wrong for 16-bit wide nand chips as they use I/O[15:0]. The Get Features command is easily fixed using 4 times the read_byte callback. For Set Features implement a new overwritable callback "write_byte". Still I expect the default to work just fine for all controllers and making it overwriteable was just done for symmetry. Signed-off-by: Uwe Kleine-König [Brian: fixed warning] Tested-by: Brian Norris Signed-off-by: Brian Norris

mtd: nand: use __packed shorthand

2014-01-14T07:13:31Z

To be consistent with the rest of include/linux/mtd/nand.h, we should use the __packed shorthand instead of __attribute__((packed)). Signed-off-by: Brian Norris Acked-by: Huang Shijie

mtd: nand: support Micron READ RETRY

2014-01-14T07:13:05Z

Micron provides READ RETRY support via the ONFI vendor-specific parameter block (to indicate how many read-retry modes are available) and the ONFI {GET,SET}_FEATURES commands with a vendor-specific feature address (to support reading/switching the current read-retry mode). The recommended sequence is as follows: 1. Perform PAGE_READ operation 2. If no ECC error, we are done 3. Run SET_FEATURES with feature address 89h, mode 1 4. Retry PAGE_READ operation 5. If ECC error and there are remaining supported modes, increment the mode and return to step 3. Otherwise, this is a true ECC error. 6. Run SET_FEATURES with feature address 89h, mode 0, to return to the default state. This patch implements the chip->setup_read_retry() callback for Micron and fills in the chip->read_retries. Tested on Micron MT29F32G08CBADA, which supports 8 read-retry modes. The Micron vendor-specific table was checked against the datasheets for the following Micron NAND: Needs retry Cell-type Part number Vendor revision Byte 180 ----------- --------- ---------------- --------------- ------------ No SLC MT29F16G08ABABA 1 Reserved (0) No MLC MT29F32G08CBABA 1 Reserved (0) No SLC MT29F1G08AACWP 1 0 Yes MLC MT29F32G08CBADA 1 08h Yes MLC MT29F64G08CBABA 2 08h Signed-off-by: Brian Norris Acked-by: Huang Shijie

mtd: nand: add generic READ RETRY support

2014-01-14T07:12:58Z

Modern MLC (and even SLC?) NAND can experience a large number of bitflips (beyond the recommended correctability capacity) due to drifts in the voltage threshold (Vt). These bitflips can cause ECC errors to occur well within the expected lifetime of the flash. To account for this, some manufacturers provide a mechanism for shifting the Vt threshold after a corrupted read. The generic pattern seems to be that a particular flash has N read retry modes (where N = 0, traditionally), and after an ECC failure, the host should reconfigure the flash to use the next available mode, then retry the read operation. This process repeats until all bitfips can be corrected or until the host has tried all available retry modes. This patch adds the infrastructure support for a vendor-specific/flash-specific callback, used for setting the read-retry mode (i.e., voltage threshold). For now, this patch always returns the flash to mode 0 (the default mode) after a successful read-retry, according to the flowchart found in Micron's datasheets. This may need to change in the future if it is determined that eventually, mode 0 is insufficient for the majority of the flash cells (and so for performance reasons, we should leave the flash in mode 1, 2, etc.). Signed-off-by: Brian Norris Acked-by: Huang Shijie

mtd: nand: add ONFI vendor block for Micron

2014-01-14T07:12:53Z

Signed-off-by: Brian Norris Acked-by: Huang Shijie

mtd: make register_mtd_parser return void

2014-01-03T19:22:22Z

register_mtd_parser never fails; hence make it return void. Signed-off-by: Axel Lin Signed-off-by: Brian Norris

mtd: make deregister_mtd_parser return void

2014-01-03T19:22:22Z

deregister_mtd_parser never fails; hence make it return void. Signed-off-by: Axel Lin Signed-off-by: Brian Norris