linux-stable.git/drivers/mtd/chips, branch linux-3.17.y Linux kernel stable tree mtd: cfi_cmdset_0001.c: fix resume for LH28F640BF chips 2014-11-14T18:10:38+00:00 Dmitry Eremin-Solenikov dbaryshkov@gmail.com 2014-10-22T23:23:01+00:00 255a8e963ea7d9d856d224a76b8a2fb99f0682fe commit 89cf38dd536a7301d6b5f5ddd73f42074c01bfaa upstream. After '#echo mem > /sys/power/state' some devices can not be properly resumed because apparently the MTD Partition Configuration Register has been reset to default thus the rootfs cannot be mounted cleanly on resume. An example of this can be found in the SA-1100 Developer's Manual at 9.5.3.3 where the second step of the Sleep Shutdown Sequence is described: "An internal reset is applied to the SA-1100. All units are reset...". As workaround we refresh the PCR value as done initially on chip setup. This behavior and the fix are confirmed by our tests done on 2 different Zaurus collie units with kernel 3.17. Fixes: 812c5fa82bae: ("mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR") Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 89cf38dd536a7301d6b5f5ddd73f42074c01bfaa upstream.

After '#echo mem > /sys/power/state' some devices can not be properly resumed
because apparently the MTD Partition Configuration Register has been reset
to default thus the rootfs cannot be mounted cleanly on resume.
An example of this can be found in the SA-1100 Developer's Manual at 9.5.3.3
where the second step of the Sleep Shutdown Sequence is described:
"An internal reset is applied to the SA-1100. All units are reset...".

As workaround we refresh the PCR value as done initially on chip setup.

This behavior and the fix are confirmed by our tests done on 2 different Zaurus
collie units with kernel 3.17.

Fixes: 812c5fa82bae: ("mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR")
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mtd: cfi_cmdset_0002: check return code for get_chip() 2014-08-16T01:09:00+00:00 Brian Norris computersforpeace@gmail.com 2014-08-14T06:35:24+00:00 5d20bad19d25bb25d9e831dd342c7c714d872b53 Coverity CID 1230633 Signed-off-by: Brian Norris <computersforpeace@gmail.com> Tested-by: Christian Riesch <christian.riesch@omicron.at> 
Coverity CID 1230633

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Christian Riesch <christian.riesch@omicron.at>
Merge tag 'v3.16-rc6' into MTD development branch 2014-07-21T07:01:16+00:00 Brian Norris computersforpeace@gmail.com 2014-07-21T06:59:16+00:00 d0d5864676dbccfb1337864a0ae6ce97e6342678 Linux 3.16-rc6 
Linux 3.16-rc6
mtd: cfi_cmdset_0002: fix do_write_buffer() timeout error 2014-07-16T18:03:38+00:00 Bean Huo beanhuo@outlook.com 2014-07-16T16:05:26+00:00 6534e6809e6c9d48114b537afe03bee3fd33bf01 For some NOR flashes, the size of the buffer program has been increased from 256 bytes to 512 bytes, and so 2ms maximum timeout can may not be sufficient for all different vendor's NOR flash. There is maximum timeout information in the CFI area, so we instead of picking a fixed value, we can calculate this according to the standard CFI parameters parsed at probe time. If we haven't probed this information, or it is smaller than 2000us, then specify a minimum value 2000us. Tested with Micron JS28F512M29EWx and Micron MT28EW512ABA flash devices. Signed-off-by: Bean Huo <beanhuo@outlook.com> [Brian: fix up comments, use 'max()'] Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
For some NOR flashes, the size of the buffer program has been increased
from 256 bytes to 512 bytes, and so 2ms maximum timeout can may not be
sufficient for all different vendor's NOR flash. There is maximum
timeout information in the CFI area, so we instead of picking a fixed
value, we can calculate this according to the standard CFI parameters
parsed at probe time. If we haven't probed this information, or it is
smaller than 2000us, then specify a minimum value 2000us.

Tested with Micron JS28F512M29EWx and Micron MT28EW512ABA flash devices.

Signed-off-by: Bean Huo <beanhuo@outlook.com>
[Brian: fix up comments, use 'max()']
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR 2014-07-14T05:22:47+00:00 Andrea Adami andrea.adami@gmail.com 2014-06-02T21:38:35+00:00 812c5fa82bae9f377f49000d7636c19a8b61735c This family of chips was long ago supported by the pre-cfi driver. CFI code tested on several Zaurus SL-5500 (Collie) 2x16 on 32 bit bus. Function is_LH28F640BF() mimics is_m29ew() from cmdset_0002.c Buffer write fixes as seen in 2007 patch c/o Anti Sullin <anti.sullin <at> artecdesign.ee> http://comments.gmane.org/gmane.linux.ports.arm.kernel/36733 [Brian: this patch is semi-urgent, because the following patch switches to using CFI detection for a chip which (until now) is unsupported by the CFI driver 9218310 ARM: 8084/1: sa1100: collie: revert back to cfi_probe ] Signed-off-by: Andrea Adami <andrea.adami@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
This family of chips was long ago supported by the pre-cfi driver.
CFI code tested on several Zaurus SL-5500 (Collie) 2x16 on 32 bit bus.

Function is_LH28F640BF() mimics is_m29ew() from cmdset_0002.c

Buffer write fixes as seen in 2007 patch c/o
Anti Sullin <anti.sullin <at> artecdesign.ee>
http://comments.gmane.org/gmane.linux.ports.arm.kernel/36733

[Brian: this patch is semi-urgent, because the following patch switches
  to using CFI detection for a chip which (until now) is unsupported by
  the CFI driver

  9218310  ARM: 8084/1: sa1100: collie: revert back to cfi_probe
]

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mtd: cfi_cmdset_0002: Add support for locking OTP memory 2014-07-12T02:44:25+00:00 Christian Riesch christian.riesch@omicron.at 2014-03-06T12:18:30+00:00 4f5cb243823b3a83864a8f51266aff6bc08436b3 This patch adds support for the locking of the one time programmable (OTP) memory of Micron M29EW devices. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
This patch adds support for the locking of the one time
programmable (OTP) memory of Micron M29EW devices.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mtd: cfi_cmdset_0002: Add support for writing OTP memory 2014-07-12T02:44:25+00:00 Christian Riesch christian.riesch@omicron.at 2014-03-06T12:18:29+00:00 af7447505732ea729af6a99e76fc558b6e3fcbcd This patch adds support for writing the one time programmable (OTP) memory of Micron M29EW devices. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
This patch adds support for writing the one time programmable (OTP)
memory of Micron M29EW devices.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mtd: cfi_cmdset_0002: Invalidate cache after entering/exiting OTP memory 2014-07-12T02:44:24+00:00 Christian Riesch christian.riesch@omicron.at 2013-04-26T19:10:28+00:00 feb8677935d4319c6d22b017fefac1532cd80529 When the one time programmable (OTP) memory region is entered by issuing the 0xaa/0x55/0x88 command, the OTP memory occupies the addresses which are normally used by the first sector of the regular flash memory. This patch therefore invalidates cache for this addresses after entering/exiting OTP memory. This patch also moves the code into separate functions. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
When the one time programmable (OTP) memory region is entered by
issuing the 0xaa/0x55/0x88 command, the OTP memory occupies the
addresses which are normally used by the first sector of the regular
flash memory. This patch therefore invalidates cache for this
addresses after entering/exiting OTP memory.

This patch also moves the code into separate functions.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mtd: cfi_cmdset_0002: Add support for reading OTP 2014-07-12T02:44:24+00:00 Christian Riesch christian.riesch@omicron.at 2014-03-06T12:18:27+00:00 dc7e9ecdd6a41edbd57b80e5ed837a06debd14ae The Micron M29EW has a 256 byte one time programmable (OTP) memory. This patch adds support for reading this memory. This support will be extended for locking and writing in subsequent patches. Signed-off-by: Christian Riesch <christian.riesch@omicron.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
The Micron M29EW has a 256 byte one time programmable (OTP) memory.
This patch adds support for reading this memory. This support will be
extended for locking and writing in subsequent patches.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mtd: Kconfig: give the CFI command set version in prompt and help 2014-05-21T00:36:43+00:00 Philippe De Muyter phdm@macqel.be 2014-03-07T15:04:01+00:00 5a4c4c5eb1939fff1a95d0812d01731cdda3694a Enhances the help for the CFI command set choices. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Brian Norris <computersforpeace@gmail.com> 
Enhances the help for the CFI command set choices.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>