Commit Graph

12 Commits

Author SHA1 Message Date
Pierre Ossman
51ec92e295 mmc: use sysfs groups to handle conditional attributes
Suppressing uevents turned out to be a bad idea as it screws up the
order of events, making user space very confused. Change the system to
use sysfs groups instead.

This is a regression that, for some odd reason, has gone unnoticed for
some time. It confuses hal so that the block devices (which have the
mmc device as a parent) are not registered. End result being that
desktop magic when cards are inserted won't work.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-22 17:02:20 -07:00
David Brownell
af51715079 MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.

 - Use mmc_host_is_spi() so enumeration works through SPI signaling
   and protocols, not just the native versions.

 - Provide the SPI response type flags with each request issued,
   including requests from the new lock/unlock code.

 - Understand that cmd->resp[0] and mmc_get_status() results for SPI
   return different values than for "native" MMC/SD protocol; this
   affects resetting, checking card lock status, and some others.

 - Understand that some commands act a bit differently ... notably:
     * OP_COND command doesn't return the OCR
     * APP_CMD status doesn't have an R1_APP_CMD analogue

Those changes required some new and updated primitives:

 - Provide utilities to access two SPI-only requests, and one
   request that wasn't previously needed:
     * mmc_spi_read_ocr() ... SPI only
     * mmc_spi_set_crc() ... SPI only (override by module parm)
     * mmc_send_cid() ... for use without broadcast mode

 - Updated internal routines:
     * Previous mmc_send_csd() modified into mmc_send_cxd_native();
       it uses native "R2" responses, which include 16 bytes of data.
     * Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
       helper for command-and-data access
     * Bugfix to that mmc_send_cxd_data() code:  dma-to-stack is
       unsafe/nonportable, so kmalloc a bounce buffer instead.

 - Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper

 - Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
   those helper routines based on whether they're native or SPI

The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI:  MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:51:30 +02:00
Pierre Ossman
d84075c8ae mmc: replace BUG_ON with WARN_ON
Replace all cases of BUG_ON with WARN_ON where there is a chance
(with varying degrees of slim) that the kernel can continue without
incidence.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:23:07 +02:00
David Vrabel
7616ee95f2 sdio: add SDIO_FBR_BASE(f) macro
Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:16:27 +02:00
Pierre Ossman
4ff6471c02 sdio: enable wide bus mode
Enable 4-bit data bus mode, according to host and card
capabilities.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:15:16 +02:00
Pierre Ossman
6db5020e73 sdio: change clock speed
Change clock speed to the highest supported by the card.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:14:09 +02:00
Pierre Ossman
1a632f8cdc sdio: split up common and function CIS parsing
Add a more clean separation between global, common CIS information
and the function specific one as we need the common information in
places where no specific function is specified.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:44:22 +02:00
Nicolas Pitre
b726126196 sdio: initial CIS parsing code
Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:26:42 +02:00
Pierre Ossman
0597007f1b sdio: basic parsing of FBR
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:13:52 +02:00
Pierre Ossman
35c66c1908 sdio: read and decode interesting parts of the CCCR
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:12:18 +02:00
Pierre Ossman
e29a7d73f4 mmc: basic SDIO device model
Add the sdio bus type and basic device handling.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:45:31 +02:00
Pierre Ossman
5c4e6f1301 mmc: detect SDIO cards
Really basic init sequence for SDIO cards.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:40:07 +02:00