- 23 Sep, 2009 40 commits
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Ohad Ben-Cohen authored
Normally writes to SDIO function 0 outside the vendor specific CCCR registers are prohibited. To support embedded devices that require writes to SDIO function 0 outside this range (e.g. TI WL127x embedded sdio wifi device), MMC_QUIRK_LENIENT_FN0 is introduced. A card quirks field is added to `struct mmc_card' to support non-standard devices (e.g. embedded sdio devices). [akpm@linux-foundation.org: code in C, not cpp!] Signed-off-by:
Ohad Ben-Cohen <ohad@wizery.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Anton Vorontsov authored
- Get rid of incomprehensible "if { for { if } }" construction for the exponential divisor calculation. The first if statement isn't correct at all, since it should check for "host->max_clk / pre_div / 16 > clock". The error doesn't cause any bugs because the check in the for loop does the right thing, and so the outer check becomes useless; - For the linear divisor do the same: a single while statement is more readable than for + if construction; - Add dev_dbg() that prints desired and actual clock frequency. Signed-off-by:Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Pierre Ossman <pierre@ossman.eu> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: David Vrabel <david.vrabel@csr.com> Cc: Ben Dooks <ben@fluff.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
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Anton Vorontsov authored
MPC85xx SOCs have normal write-protect state reporting, so we shouldn't hard-code the quirk. Instead, look for "sdhci,wp-inverted" property, plus check for mpc837x_{rdb,mds} machines since older device trees don't specify the new property. Signed-off-by: -
Anton Vorontsov authored
eSDHC block in MPC837x SOCs reports inverted write-protect state, soon sdhci-of driver will look for sdhci,wp-inverted properties to decide whether apply a specific quirk. So, document the property and add it to device tree source files. Signed-off-by:
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Anton Vorontsov authored
eSDHC fails to recognize some SDHS cards, throwing timeout errors: mmc0: error -110 whilst initialising SD card That's because we calculate timeout value in a wrong way: on eSDHC hosts the timeout clock is derivied from the SD clock, which is set dynamically. As David Vrabel suggested, deriving timeout clock from SD clock is a common scheme, so let's implement DATA_TIMEOUT_USES_SDCLK quirk and use it for eSDHC hosts. Also, from now on we don't need esdhc_get_timeout_clock() callback, so remove it. Signed-off-by:
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Anton Vorontsov authored
SDHCI core tries to write HISPD bit into the host control register, but the eSDHC controllers don't have that bit, and that causes all sorts of misbehaviour when using 4-bit mode capable SD cards. Signed-off-by:
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Anton Vorontsov authored
Linear divisor's values in a register start at 0 (zero means "divide by 1"). Before this patch the code didn't account that fact, so SD cards were running underclocked. Signed-off-by:
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Roel Kluin authored
Avoid buffer underrun when parsing an invalid CISTPL_VERS_1. Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Cc: David Vrabel <david.vrabel@csr.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
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Anton Vorontsov authored
get_min_clock() makes sense only with NONSTANDARD_CLOCK quirk and when set_clock() callback is specified. The patch should cause no functional changes, it just makes the code self-documented and avoids any possible misuse of get_min_clock(). Suggested-by:
Pierre Ossman <pierre@ossman.eu> Signed-off-by:
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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:
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:
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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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