1 Gbit W25Q01JV flash uses two 512 Mbit dies. This requires specific
operations in the driver in order to support the entire 1 Gbit region.
This commit adds dual die support for W25Q01JV flash.
Generally the driver has to switch active dies when die specific read from
status register is required (therefore before read, write, erase and when
checking if write status register was successful).
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
W25QXXXJV_WRITE_STATUS_2 register uses just first byte therefore all
operations has to be done in priv->cmdbuf[0]. Previous priv->cmdbuf[1]
caused QuadSPI mode not being enabled.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
follow how Linux report the correction information from ecc:
http://www.infradead.org/pipermail/linux-mtd/2012-March/040305.html
since this information is very useful to file system(e.g. yaffs, ubi/buifs)
which is specially designed for nand flash.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Since not all nand devices follow ONFI spec, nand_raw_initialize could be used to skip ONFI special action
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Current driver supports MTDIOC_BULKERASE ioctl that erases the entire
device. The added ioctl MTDIOC_ERASESECTORS adds possibility to erase
just sectors defined by the user.
This is similar to MEMERASE call in Linux kernel.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
since mmap may exist in block_operations, but truncate may not,
moving mmap beforee truncate could make three struct more compatible
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
- Add mmap into file_operations and remove it from ioctl definitions.
- Add mm_map structure definitions to support future unmapping
- Modify all drivers to initialize the operations struct accordingly
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
- Add truncate into file_operations
- Move truncate to be common for mountpt_operations and file_operations
- Modify all drivers to initialize the operations struct accordingly
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
GG25Q devices have the 4 byte read mode in bit 0 not bit 3 of the status register. This changes allows for both depending on the JEDEC DEVICE ID that is read back.
since we can query this value by MTDIOC_ERASESTATE after:
commit 30cb497fe1
Author: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
Date: Tue Jul 13 19:33:12 2021 -0300
mtd: Add MTDIOC_ERASESTATE command for retrieving erase state value
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
