- 23 Sep, 2009 40 commits
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Ohad Ben-Cohen authored
Add support to disconnect the pull-up resistor on CD/DAT[3] (pin 1) of the card. This may be desired on certain setups of boards, controllers and embedded sdio devices which do not need the card's pull-up. As a result, card detection is disabled and power is saved. [akpm@linux-foundation.org: simplify sdio_disable_cd() a bit] Signed-off-by:
Ohad Ben-Cohen <ohad@wizery.com> Acked-by:
Matt Fleming <matt@console-pimps.org> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Philip Langdale <philipl@overt.org> Cc: Pierre Ossman <pierre@ossman.eu> Cc: David Vrabel <david.vrabel@csr.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Madhusudhan Chikkature authored
Update maintainers entry for TI OMAP HS MMC support. Signed-off-by:
Madhusudhan Chikkature <madhu.cr@ti.com> Acked-by:
Kevin Hilman <khilman@deeprootsystems.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
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Adrian Hunter authored
Specify MMC capabilities and set the power-saving flag for RX51. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Acked-by:
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Adrian Hunter authored
Commands like SWITCH (CMD6) send a response and then signal busy while the operation is completed. These commands are expected to always succeed (otherwise the response would have indicated an error). Set an arbitrarily large data timeout value (100ms) for these commands to ensure that premature timeouts do not occur. Signed-off-by:
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Adrian Hunter authored
[madhu.cr@ti.com: fix for the db clock failure message] Signed-off-by:
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Adrian Hunter authored
Depending on the manufacturer, there is a small possibility that removing a card while it is being written to, can render the card permanently unusable. To prevent that, the card is made inaccessible when the cover is open. Signed-off-by:
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Denis Karpov authored
Functions', structures', variables' names are changed to start with omap_hsmmc_ prefix. Signed-off-by:
Denis Karpov <ext-denis.2.karpov@nokia.com> Signed-off-by:
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Adrian Hunter authored
If an unexpected interrupt occurs while preparing the next request, an oops can occur. For example, a new request is setting up DMA for data transfer so host->data is not NULL. An unexpected transfer complete (TC) interrupt comes along and the interrupt handler sets host->data to NULL. Oops! Prevent that by adding a spinlock. Signed-off-by:
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Adrian Hunter authored
Sometimes the controller unexpectedly produces a TC (transfer complete) interrupt before the CC (command complete) interrupt for command 6 (SWITCH). This is a problem because the CC interrupt can get mixed up with the next request. Add a hack for CMD6. Signed-off-by:
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Adrian Hunter authored
Clear the interrupt status after sending the initialization sequence, as specified in the TRM. Signed-off-by:
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Denis Karpov authored
Use macro mmc_slot() in omap_hsmmc. Signed-off-by:
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Jarkko Lavinen authored
Do not call 'mmc_omap_xfer_done()' if the request is already done. Signed-off-by:
Jarkko Lavinen <jarkko.lavinen@nokia.com> Signed-off-by:
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Jarkko Lavinen authored
After 1 second of inactivity, put card and/or regulator to sleep. After 8 seconds of inactivity, turn off the power. Signed-off-by:
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Adrian Hunter authored
When a card is not in use, the voltage regulator can be put to sleep. This is an alternative to powering the card off, when powering off is not safe because the card might be replaced without the driver being aware of it. That situation happens if: - the card is removable i.e. not eMMC - and there is no card detect - and there is a cover switch but the cover is open Signed-off-by:
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Adrian Hunter authored
Add the ability for the driver to put the card power regulators to sleep and wake them up again. Signed-off-by:
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Denis Karpov authored
Support for multi-level dynamic power saving states in omap_hsmmc (ENABLED->DISABLED->OFF). In the "deepest" state (OFF) we switch off the voltage regulators. Signed-off-by:
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Adrian Hunter authored
Let the board specify that a card is nonremovable e.g. eMMC Signed-off-by:
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Jarkko Lavinen authored
Do not use host->dma_len when it is uninitialzed. Finish the request with an error if the mmc_omap_prepare_data() fails. Signed-off-by:
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Adrian Hunter authored
Signed-off-by:
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Denis Karpov authored
The code could set the bit to 1 but not reset it to 0. Signed-off-by:
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Denis Karpov authored
Keep the context over PM dynamic OFF states. Signed-off-by:
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Adrian Hunter authored
This patch is preparation for adding context save and restore support. Keep track of the current power mode so that the context restore function can avoid restoring the context for a card if the power has been switched off. If the power is off, the card must be reinitialized anyway which will re-establish the context. Signed-off-by:
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Denis Karpov authored
PM dynamic OFF state results in context loss. That is, the host controller has been powered off at some point, which means the registers have been reset. The driver must detect when this happens, and restore the context. This patch adds the means to detect context loss. Note, the PM side is not yet implemented. Signed-off-by:
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Adrian Hunter authored
For the moment enable / disable just turns the fclk on and off. Signed-off-by:
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Denis Karpov authored
Adds <debugfs_root>/kernel/debug/mmc<N>/regs entry, contents show registers' state and some driver internal state variables. Signed-off-by:
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Adrian Hunter authored
According to the standard, the SWITCH command should be followed by a SEND_STATUS command to check for errors. Signed-off-by:
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Denis Karpov authored
Fix MMC host stop sequence: power off once. Signed-off-by:
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Jarkko Lavinen authored
Add support for the new MMC command SLEEP_AWAKE. Signed-off-by:
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Adrian Hunter authored
Power can be saved by powering off cards that are not in use. This is similar to suspend / resume except it is under the control of the driver, and does not require any power management support. It can only be used when the driver can monitor whether the card is removed, otherwise it is unsafe. This is possible because, unlike suspend, the driver still receives card detect and / or cover switch interrupts. Signed-off-by:
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Adrian Hunter authored
eMMC's are not removable, so unsafe resume is OK always. To permit this a new host capability MMC_CAP_NONREMOVABLE has been added and suspend / resume updated accordingly. Signed-off-by:
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Adrian Hunter authored
This change allows the MMC host to be claimed in situations where the host may or may not have already been claimed. Also 'mmc_try_claim_host()' is now exported. Signed-off-by:
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Adrian Hunter authored
MMC hosts that support power saving can use the 'enable' and 'disable' methods to exit and enter power saving states. An explanation of their use is provided in the comments added to include/linux/mmc/host.h. Signed-off-by:
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Ohad Ben-Cohen authored
This is needed for 1.8V embedded SDIO devices and supporting host controllers (e.g. TI 127x and ZOOM2 boards) Signed-off-by:
Ohad Ben-Cohen <ohad@bencohen.org> Acked-by:
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Uwe Kleine-König authored
omap_mmc_probe lives in .init.text, so using platform_driver_register to register it is wrong because binding a device after the init memory is discarded (e.g. via sysfs) results in an oops. As requested by David Brownell platform_driver_probe is used instead of moving the probe function to .devinit.text as proposed initially. This saves some memory, but devices registered after the driver is probed are not bound (probably there are none) and binding via sysfs isn't possible. Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Jean Pihet <jpihet@mvista.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Pierre Ossman <drzeus@drzeus.cx> Cc: Andy Lowe <alowe@mvista.com> Cc: Adrian Hunter <ext-adrian.hunter@nokia.com> Cc: Andrew Morton <akpm@linux-foundation.org> Acked-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Madhusudhan Chikkature<madhu.cr@ti.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Matt Fleming <matt@console-pimps.org> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Philip Langdale <philipl@overt.org> Signed-off-by:
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Joe Perches authored
Signed-off-by:
Joe Perches <joe@perches.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Brian Swetland <swetland@google.com> Cc: Pierre Ossman <drzeus-list@drzeus.cx> Cc: San Mehat <san@android.com> Cc: Matt Fleming <matt@console-pimps.org> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Philip Langdale <philipl@overt.org> Signed-off-by:
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Joe Perches authored
Make it a bit more like typical kernel style. Signed-off-by:
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Joe Perches authored
Signed-off-by:
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San Mehat authored
MMC Driver for HTC Dream. I picked the code up from Google git trees, removed stuff not strictly necessary, and did a few cleanups. It still works :-). Signed-off-by:
Pavel Machek <pavel@ucw.cz> Cc: Brian Swetland <swetland@google.com> Cc: Pierre Ossman <drzeus-list@drzeus.cx> Cc: Joe Perches <joe@perches.com> Cc: Matt Fleming <matt@console-pimps.org> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Philip Langdale <philipl@overt.org> Signed-off-by:
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Anand Gadiyar authored
This considerably reduces the number of interrupts during a transfer and ought to result in some power saving. Signed-off-by:
Anand Gadiyar <gadiyar@ti.com> Signed-off-by:
Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by:
Kishore Kadiyala <kishore.kadiyala@ti.com> Cc: Pierre Ossman <drzeus@drzeus.cx> Cc: Matt Fleming <matt@console-pimps.org> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Philip Langdale <philipl@overt.org> Signed-off-by:
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Balaji Rao authored
When mmc_power_up is called during unsafe resume, host->ocr should be used instead of host->ocr_avail. Signed-off-by:
Balaji Rao <balajirrao@openmoko.org> Cc: Andy Green <andy@openmoko.com> Cc: Pierre Ossman <drzeus-mmc@drzeus.cx> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Philip Langdale <philipl@overt.org> Acked-by:
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