Commit Graph

29 Commits

Author SHA1 Message Date
Ian Lepore
ed7142a72d Consistently init all mmc request, command, and data structures to zero
before using them.
2013-08-17 00:19:27 +00:00
Rui Paulo
88e07d922d Use meaningful names when creating mmc/sd threads.
This can be useful when we want to be able to identify which mmcsd is stuck.
2013-07-09 03:00:06 +00:00
Warner Losh
c96e8c3222 When reporting the user readable size, round up. Several SD cards not
only use SI units, but also are a couple of percent short. If you need
to know the exact size, diskinfo will return exact results.
2013-05-16 19:44:51 +00:00
Warner Losh
8fa3a54014 Print MB and GB instead of MiB and GiB mislabeled as MB and GB.
SD cards are sold in GB not GiB, this will result in less confusion.
Also, cache parent device pointer to save a few cycles for loops.
2013-04-14 19:21:43 +00:00
Ian Lepore
a350e54067 Set the backlink in mmc commands to the mmc request that contains them. 2013-03-24 17:23:10 +00:00
Warner Losh
bb1ef63f08 The check for MAXPHYS doesn't make sense, so remove it.
Report errors indicated by the transport.  If this is too chatty, I'll
throw it behind a debug write.
Remove commented out debugs that are no longer useful.
2012-08-23 04:35:55 +00:00
Marius Strobl
ae5d8757bf Add missing prototypes. While at it, sort them alphabetically.
MFC after:	3 days
2012-06-02 20:47:00 +00:00
Marius Strobl
7aa6584632 o Fixes:
- When switching to 4-bit operation, send a SET_CLR_CARD_DETECT command
    to disconnect the card-detect pull-up resistor from the DAT3 line before
    sending the SET_BUS_WIDTH command.
  - Add the missing "reserved" zero entry to the mantissa table used to
    decode various CSD fields. This was causing SD cards to report that they
    could run at 30 MHz instead of the maximum 25 MHz mandated in the spec.
o Enhancements:
  - At the MMC layer, format various info from the CID into a string that
    uniquely identifies the card instance (manufacturer number, serial
    number, product name and revision, etc). Export it as an instance
    variable.
  - At the MMCSD layer, display the formatted card ID string, and also
    report the clock speed of the hardware (not the card's max speed), and
    the number of bits and number of blocks per transfer. It comes out like
    this now:
    mmcsd0: 968MB <SD SD01G 8.0 SN 276886905 MFG 08/2008 by 3 SD> at mmc0
    22.5MHz/4bit/128-block
o Use DEVMETHOD_END.
o Use NULL instead of 0 for pointers.

PR:		156496
Submitted by:	Ian Lepore
MFC after:	1 week
2012-04-21 01:51:16 +00:00
Alexander Motin
1f89a4dc85 Fix integer overflow on 32bit systems when calculating media size,
reintroduced by r222475.

Approved by:	re (kib)
2011-08-14 16:17:00 +00:00
Alexander Motin
a1fda318a8 Add kernel dumping support. Works fine with sdhci controller driver. 2009-02-17 19:17:25 +00:00
Alexander Motin
eb67f31a1b Implement suspend/resume for mmc and mmcsd drivers.
Now it is possible to suspend/resume with inserted and active card.

To reinitialize card on resume and to detect card change while suspended,
implement bus rescan routines. It can also be used by controllers without
card presence detection signals or with multiple cards per slot support.

While there, cleanup msleep() usage. We have no any rights to exit without
"request done" signal from driver as it could lead to modify after free.
2008-12-06 21:41:27 +00:00
Alexander Motin
2262a5197a Report card erase sector size as disk stripe size. 2008-11-23 14:32:40 +00:00
Alexander Motin
249b0e8586 Improve detach handling: close races, flush queue. 2008-11-23 14:02:06 +00:00
Alexander Motin
3a4a255741 Allow card reader bridge driver to report maximum supported transfer size.
sdhci supports up to 65535 blocks transfers, at91_mci - one block.

Enable multiblock operations disabled before to follow at91_mci driver
limitations.

Reviewed by:	imp@
2008-10-29 20:01:26 +00:00
Alexander Motin
a7cf627487 Coalesce sequentional BIO_DELETE requests to slightly relax size and alignment
constraints required by the card.
2008-10-18 22:22:25 +00:00
Alexander Motin
3906d42d63 Implement BIO_DELETE command with MMC and SD erase commands.
Erase operation gives card's logic information about unused areas to help it
implement wear-leveling with lower overhead comparing to usual writing.
Erase is much faster then write and does not depends on data bus speed.
Also as result of hitting in-card write logic optimizations I have measured
up to 50% performance boost on writing undersized blocks into preerased areas.

At the same time there are strict limitations on size and allignment of erase
operations. We can erase only blocks aligned to the erase sector size and
with size multiple of it. Different cards has different erase sector size
which usually varies from 64KB to 4MB. SD cards actually allow to erase
smaller blocks, but it is much more expensive as it is implemented via
read-erase-write sequence and so not sutable for the BIO_DELETE purposes.

Reviewed by:	imp@
2008-10-18 16:17:04 +00:00
Alexander Motin
58bb626051 Use GB suffix only from 10GB instead of 1GB.
There are lot of cards with uneven sizes and too strong rounding
will lead to very significant rounding errors.

Reviewed by:	imp@
2008-10-12 19:19:26 +00:00
Warner Losh
a0075e5860 Print the cards natural size.
Move nested tertiary operator expressions into their own function.
Remove extra blank line.
cache sd->disk in 'd' to make the code easier to read.
2008-10-12 07:24:31 +00:00
Alexander Motin
67d752c3d4 Give mmcsd driver a bit more information about card. It allows to reorganize
log message in a way a bit more common for disk devices. Also it will allow
mmcsd driver to use MMC/SD specific commands when needed.
2008-10-11 13:05:13 +00:00
Alexander Motin
c18f1e2627 Set of mmc layer improvements:
- add MMC support.
 - add SDHC support.
 - add 4 and 8 bit bus width support.
 - add High Speed bus timing support.
2008-10-08 17:35:41 +00:00
Warner Losh
38c51cbe85 Define and use MMC_SECTOR_SIZE.
Make mmc_get_media_size now return an off_t and remove now useless cast.
2008-10-02 07:06:59 +00:00
Warner Losh
a84f3c7af9 MAXPHYS seems more stable on the AT91RM9200 boards that I have. We
may need to ask the host controller for the right number to use
here...
2008-10-02 07:00:31 +00:00
Warner Losh
0c0903b1e1 Improve support for multiple block read/write. This code is currently
disabled by default because there's problems with it on AT91RM9200,
currently the only host controller in the tree.  I've not had time to
track those problems to ground.  I'm committing because this is
important for other host controllers that are in the pipeline.

Submitted by:	mav@
2008-09-30 02:34:45 +00:00
Warner Losh
128d0ff2c4 Conform to style(9) for return (foo); The files were a mix before.
Submitted by:	mav@
2008-09-29 18:05:26 +00:00
Warner Losh
08eb9a9be8 When a device is read only, fail all non-read BIO requests.
Submitted by:	mav@
2008-09-28 22:42:29 +00:00
Julian Elischer
3745c395ec Rename the kthread_xxx (e.g. kthread_create()) calls
to kproc_xxx as they actually make whole processes.
Thos makes way for us to add REAL kthread_create() and friends
that actually make theads. it turns out that most of these
calls actually end up being moved back to the thread version
when it's added. but we need to make this cosmetic change first.

I'd LOVE to do this rename in 7.0  so that we can eventually MFC the
new kthread_xxx() calls.
2007-10-20 23:23:23 +00:00
Warner Losh
14eced725c A careful reading of the disclaimer that is required to download the
SD Simplified specification, as well as other SD and SDIO
implemenations I've examined, suggest this disclaimer may be required.
It is unclear to me exactly what the license would be for, or why it
might be required.  Err on the side of caution and include this
disclaimer so anybody deploying this code can judge for themselves.  I
have no further unformation about the details.
2007-05-26 05:23:36 +00:00
Warner Losh
0e1466ac89 First cut at making detach work. also add sdh as a possible mmc bridge.
Submitted by: Andrea Bittau
(Andrea may have updated patches, but I've tested these)
2007-05-15 05:49:14 +00:00
Warner Losh
114b4164dd Preliminary MMC stack. This stack supports SD 1.0 cards only, but
should be easily adapted to SD 2.0 (aka SDHC), SDIO, MMC and MMCplus
cards.  At the present time, there's only one bridge driver for the
ARM9 based Atmel AT91RM9200.
2006-10-20 06:39:59 +00:00