linux.git/include/linux/mmc, branch v3.13

mmc: core: Add MMC_CAP_RUNTIME_RESUME to resume at runtime_resume

2013-10-31T00:28:43+00:00

In some environments it is to prefer to postpone the resume of the card
device until runtime_resume is being carried out, since it will mean a
signficant decrease of the total system resume time.

The reason of the decreased resume time is simply because of the actual
re-initalization of the card, which typically takes hundreds of
milliseconds, is performed outside the resume sequence and wont thus
affect it.

For removable card, the detect work tries to re-detect the card to make
sure it is still present, as a part of that sequence the card will also
be runtime_resumed and thus also fully resumed.

For a non-removable card, typically a mmc blk request will trigger a
runtime_resume and thus fully resume the card. This also means the
first request will likely suffer from an inital latency since the
re-initialization of the card needs to be performed.

Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: Don't force card to active state when entering suspend/shutdown

2013-10-31T00:28:40+00:00

By adding a card state that records if it is suspended or resumed, we
can accept asyncronus suspend/resume requests for the mmc and sd
bus_ops.

MMC_CAP_AGGRESSIVE_PM, will at request inactivity through the runtime
bus_ops callbacks, execute a suspend of the the card. In the state were
this has been done, we can receive a suspend request for the mmc bus,
which for sd and mmc forced the card to active state by a
pm_runtime_get_sync. In other words, the card was resumed and then
immediately suspended again, completely unnecessary.

Since the suspend/resume bus_ops callbacks for sd and mmc are now
capable of handling asynchronous requests, we no longer need to force
the card to active state before executing suspend. Evidently preventing
the above sequence for MMC_CAP_AGGRESSIVE_PM.

Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: core: Remove deprecated mmc_suspend|resume_host APIs

2013-10-31T00:28:38+00:00

The are no more users of the deprecated mmc_suspend|resume_host API,
so let's remove it.

Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: core: Move cached value of the negotiated ocr mask to card struct

2013-10-31T00:26:29+00:00

The negotiated ocr mask is directly related to the card. Once a card
gets removed, the mask shall be dropped. By moving the cache of the ocr
mask from the host struct to the card struct we have accomplished this.

Signed-off-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: core: Do not poll for busy with status cmd for all switch cmds

2013-10-31T00:26:24+00:00

Some switch operations like poweroff notify, shall according to the
spec not be followed by any other new commands. For these cases and
when the host does'nt support MMC_CAP_WAIT_WHILE_BUSY, we must not
send status commands to poll for busy detection. Instead wait for
the stated timeout from the EXT_CSD before completing the request.

Signed-off-by: Ulf Hansson 
Cc: Jaehoon Chung 
Signed-off-by: Chris Ball

mmc: core: clean up duplicate macros

2013-09-26T01:51:52+00:00

Clean up the duplicate macros:
mmc_sd_card_uhs -> mmc_card_uhs
mmc_sd_card_set_uhs -> mmc_card_set_uhs

Signed-off-by: Jackey Shen 
Signed-off-by: Chris Ball

mmc: dw_mmc: guarantee stop-abort cmd in data errors

2013-09-26T01:35:40+00:00

In error cases, DTO interrupt may or may not be generated depending
on remained data. Stop/Abort command ensures DTO generation for that
situation. Currently if 'stop' field of data is empty, there is no
stop/abort command. So, it could hang waiting DTO. This change
reinforces these cases.

Signed-off-by: Seungwon Jeon 
Tested-by: Alim Akhtar 
Signed-off-by: Chris Ball

mmc: dw_mmc: control card read threshold

2013-09-26T01:34:39+00:00

Card Read Threshold should be ensured that the card clock does not stop
in the middle of a block of data being transferred from the card to the
Host. Specially, clock stop is allowed in fast transfer such as HS200
or SDR104 mode. And so, it should be enabled.

Signed-off-by: Seungwon Jeon 
Tested-by: Alim Akhtar 
Signed-off-by: Chris Ball

mmc: dw_mmc: adjust the fifoth with block size

2013-09-26T01:34:18+00:00

This change helps to choose msize, rx_watermark and tx_watermark
depending on block size for IDMAC mode.  For SDIO block size can be
variable, so if these values are set incorrectly, card clock may stop.

Signed-off-by: Seungwon Jeon 
Tested-by: Alim Akhtar 
Signed-off-by: Chris Ball

mmc: core: remove dead function mmc_try_claim_host

2013-09-26T01:26:29+00:00

cscope says there are no callers for mmc_try_claim_host in the kernel.
No reason to keep it.

Signed-off-by: Grant Grundler 
Acked-by: Ulf Hansson 
Signed-off-by: Chris Ball