- 23 Oct, 2010 40 commits
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Sonic Zhang authored
The SPI bus is not reliable for large data transfers on all platforms. The current mmc_spi driver fails SD read/write commands immediately if occasional CRC errors are reported by the SD device. This patch makes the operation recover from CRC errors by repeating the last SD command. The retry count is set to 5 to ensure the driver passes stress tests. Signed-off-by:
Sonic Zhang <sonic.zhang@analog.com> Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Signed-off-by:
Chris Ball <cjb@laptop.org>
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Wolfram Sang authored
This driver adds basic support for the esdhc-core found on e.g. imx35/51, as a platform driver. Signed-off-by:
Wolfram Sang <w.sang@pengutronix.de> Acked-by:
Anton Vorontsov <cbouatmailru@gmail.com> Tested-by:
Eric Bénard <eric@eukrea.com> Signed-off-by:
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Wolfram Sang authored
Put everything which can be shared between the OF and platform version of this driver into a local .h file. Signed-off-by:
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Wolfram Sang authored
The custom init call may need more data to perform its job, so we pass it a pointer to pdata, too. Also, always use the platform_id specific data even if platform_data is present. Doing that, platform_data can additionally be parsed by init() for board-specific information (via sdhci->mmc->parent). (Note: the old behaviour was that you could override the platform_id specific data with your own. However, one can still do this by using the "sdhci" id instead of "sdhci-<something>".) Signed-off-by:
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Wolfram Sang authored
Some controllers handle their write-protection differently. Introduce a callback to be able to handle it, ensuring the same locking takes place for it. Rename the status variable to make it more obvious why the read from the registers needs to be inverted. Signed-off-by:
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Wolfram Sang authored
Make use of the include/linux/mmc directory. Signed-off-by:
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Wolfram Sang authored
We need to carry some information per host, e.g. the clock. Add a structure for it and initialize it in the generic part. Also improve the check for a parent. Signed-off-by:
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Randy Dunlap authored
Fix kconfig dependency warning to satisfy dependencies: warning: (MMC_CB710 && MMC && PCI) selects CB710_CORE which has unmet direct dependencies (MISC_DEVICES && PCI) Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Acked-by:
Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by:
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Michał Mirosław authored
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Michał Mirosław authored
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Michał Mirosław authored
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Michał Mirosław authored
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Michał Mirosław authored
Clock divider selection in partially verified, so document known facts in code. Signed-off-by:
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Andy Shevchenko authored
For debugging power management features it is convenient to have the possibility of changing the MMC host controller clock at runtime. This patch adds a 'clock' file for this under the MMC host root of debugfs. Usage is as follows: # cat /sys/kernel/debug/mmc0/clock 52000000 # echo "1000000000" > /sys/kernel/debug/mmc0/clock # cat /sys/kernel/debug/mmc0/clock 52000000 # echo "48000000" > /sys/kernel/debug/mmc0/clock # cat /sys/kernel/debug/mmc0/clock 48000000 The middle example shows limits being applied by the host driver. Signed-off-by:
Andy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Adrian Hunter <adrian.hunter@nokia.com> [cjb: modify changelog language] Signed-off-by:
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Philip Rakity authored
Snippet of code for how adaptation layer should handle the call: /* * eMMC spec calls for the host to send 74 clocks to the card * during initialization, right after voltage stabilization. * create the clocks manually right here. */ void generate_init_clocks_A0(struct sdhci_host *host, u8 power_mode) { struct sdhci_mmc_slot *slot = sdhci_priv(host); if (slot->power_mode == MMC_POWER_UP && power_mode == MMC_POWER_ON) { /* controller specific code here */ /* slot->power_mode holds previous power setting */ } slot->power_mode = power_mode; } Signed-off-by:Philip Rakity <prakity@marvell.com> Signed-off-by:
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Philip Rakity authored
The SD and MMC code set highspeed using different constants. Change the sd driver to recognize this and switch to high speed. Validated code when testing eMMC dual data rate. Signed-off-by:
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Alan Cox authored
This adds the basic identifiers. Due to the various chip quirks it's not enough to make MRST support very useful for earlier steppings but that can follow. (I'm currently trying to verify which steps actually matter outside Intel so I can avoid unneeded stuff going upstream) [Extracted from original development] Signed-off-by:
JiebingLi <jiebing.li@intel.com> [Folds in fixes] Signed-off-by:
Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
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Xiaochen Shen authored
Basic support for the Intel Medfield devices Give them their own quirks as we will need to update this later. Signed-off-by:
Xiaochen Shen <xiaochen.shen@intel.com> Signed-off-by:
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Alan Cox authored
Currently we write it to the chip data, but if the probe handler overrides it we ignore the new value and keep using our cached one. Fix this so that a probe handler can adjust the slot count. Signed-off-by:
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Ohad Ben-Cohen authored
Bring SDIO devices back to full power before their suspend handler is invoked. Doing so ensures that SDIO suspend/resume semantics are maintained (drivers still get to decide whether their card should be removed or kept during system suspend, and at what power state), and that SDIO suspend/resume execution paths are unchanged. This is achieved by resuming a runtime-suspended SDIO device in its ->prepare() PM callback (similary to the PCI subsystem). Since the PM core always increments the run-time usage counter before calling the ->prepare() callback and decrements it after calling the ->complete() callback, it is guaranteed that when the system will come out of suspend, our device's power state will reflect its runtime PM usage counter. Signed-off-by:
Ohad Ben-Cohen <ohad@wizery.com> Tested-by:
Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by:
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Ohad Ben-Cohen authored
To prevent an erroneous removal of the card, make sure the device is powered when it is mmc_sdio_detect()ed. This is required since mmc_sdio_detect may be invoked while the device is runtime suspended (e.g., MMC core is rescanning when system comes out of suspend). Signed-off-by:
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Ohad Ben-Cohen authored
Enable runtime PM for SDIO functions. SDIO functions are initialized with a disabled runtime PM state, and are set active (and their usage count is incremented) only before potential drivers are probed. SDIO function drivers that support runtime PM should call pm_runtime_put_noidle() in their probe routine, and pm_runtime_get_noresume() in their remove routine (very similarly to PCI drivers). In case a matching driver does not support runtime PM, power will always be kept high (since the usage count is positive). Signed-off-by:
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Ohad Ben-Cohen authored
Enable runtime PM for new SDIO cards. As soon as the card will be added to the device tree, runtime PM core will release its power, since it doesn't have any users yet. Signed-off-by:
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Ohad Ben-Cohen authored
Assign the generic runtime PM handlers for SDIO. These handlers invoke the relevant SDIO function drivers' handlers, if exist, otherwise they just return success (so SDIO drivers don't have to define any runtime PM handlers unless they need to). Runtime PM is still disabled by default, so this patch alone has no immediate effect. Signed-off-by:
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Ohad Ben-Cohen authored
Add MMC runtime PM handlers, which call mmc_power_save_host and mmc_power_restore_host in response to runtime_suspend and runtime_resume events. Runtime PM is still disabled by default, so this patch alone has no immediate effect. Signed-off-by:
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Ohad Ben-Cohen authored
Add a power_restore handler to the SDIO bus ops, in order to support waking up SDIO cards that were powered off by runtime pm. Signed-off-by:
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Ohad Ben-Cohen authored
Allow power save/restore and their relevant mmc_bus_ops handlers exit with a return value. Signed-off-by:
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Ohad Ben-Cohen authored
On resume, let mmc_sdio_init_card go all the way, instead of skipping the reconfiguration of the card's speed and width. This is needed to ensure cards wake up with their clock reconfigured (otherwise it's kept low). This patch also removes the explicit bus width reconfiguration on resume, since now this is part of mmc_sdio_init_card. Signed-off-by:
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Giuseppe Cavallaro authored
Some platforms based on sdhci-pltfm need to set their own quirks. Previously to this patch, the quirks were in drivers/mmc/host/sdhci.h. This patch splits drivers/mmc/host/sdhci.h into two parts: * drivers/mmc/host/sdhci.h includes the HC registers and I/O accessors. * include/linux/mmc/sdhci.h includes the sdhci structure and quirks. Instead of including drivers/mmc/host/sdhci.h, -pltfm drivers should now include include/linux/mmc/sdhci.h and include/linux/sdhci-pltfm.h. This patch avoids adding/changing the calls/flags in the sdhci_pltfm_data structure. It has been tested on STM platforms (e.g. STx7106, STx7108, STx5206) where the driver is configured and used as shown in the example below: [snip] static int mmc_pad_resources(struct sdhci_host *sdhci) { if (!devm_stm_pad_claim(sdhci->mmc->parent, &stx7108_mmc_pad_config, dev_name(sdhci->mmc->parent))) return -ENODEV; return 0; } static struct sdhci_pltfm_data stx7108_mmc_platform_data = { .init = mmc_pad_resources, .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, }; static struct platform_device stx7108_mmc_device = { .name = "sdhci", [snip] Note: drivers/mmc/host/sdhci.h now also includes linux/mmc/sdhci.h, and no modifications should be needed on other sdhci-<XXX> drivers. Signed-off-by:Giuseppe Cavallaro <peppe.cavallaro@st.com> Reviewed-by:
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Giuseppe Cavallaro authored
This patch fixes a warning when compiling the sdhci driver: pwr may be used uninitialized in sdhci_set_power Tested with the following compiler versions: 4.2.4 and 4.4.4 Signed-off-by:
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Giuseppe Cavallaro authored
This patch adds the suspend and resume functions in the sdhci-pltfm device driver. Signed-off-by:
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Ethan Du authored
Usually there are multiple mmc host controllers; rename mmc queue thread by host index so we can easily identify which controller it belongs to. Signed-off-by:
Ethan Du <ethan.too@gmail.com> Signed-off-by:
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Adrian Hunter authored
One flaw with DDR support is that MMC core does not inform the driver which DDR mode it has selected. This patch expands the ios->ddr flag to do that. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by:
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Adrian Hunter authored
The DDR support patch needs the following fixes: - The block driver does not need to know about DDR, any more than it needs to know about bus width. - Not only the card must be switched to DDR mode. The host controller must also be configured, which is done through the 'set_ios()' function. - Do not set the DDR mode state until after the switch command is successful. - Setting block length is not supported in DDR mode. Make that a core function and change the other place it is used (mmc_test) also. Signed-off-by:
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Hanumath Prasad authored
Add support for Dual Data Rate MMC cards as defined in the 4.4 specification. Signed-off-by:
Hanumath Prasad <hanumath.prasad@stericsson.com> Cc: linux-mmc@vger.kernel.org Acked-by:
Linus Walleij <linus.walleij@stericsson.com> Tested-by Zhangfei Gao <zhangfei.gao@marvell.com> Signed-off-by:
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Linus Walleij authored
After discovering a problem in regulator reference counting I took Mark Brown's advice to move the reference count into the MMC core by making the regulator status a member of struct mmc_host. I took this opportunity to also implement NULL versions of the regulator functions so as to rid the driver code from some ugly #ifdef CONFIG_REGULATOR clauses. Signed-off-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Liam Girdwood <lrg@slimlogic.co.uk> Cc: Tony Lindgren <tony@atomide.com> Cc: Adrian Hunter <adrian.hunter@nokia.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Sundar Iyer <sundar.iyer@stericsson.com> Cc: Daniel Mack <daniel@caiaq.de> Cc: Pierre Ossman <pierre@ossman.eu> Cc: Matt Fleming <matt@console-pimps.org> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Cliff Brake <cbrake@bec-systems.com> Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Eric Bénard authored
mmc_rescan() includes a pr_info which prints 4 lines each second for hosts configured with MMC_CAP_NEEDS_POLL. This patch enables the message only if CONFIG_MMC_DEBUG is selected. Tested on i.MX51's sdhci-esdhc. Signed-off-by:
Hein Tibosch <hein_tibosch@yahoo.es> Signed-off-by:
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Hein Tibosch authored
In the latest releases of the mmc driver, the freq during initialization is set to a fixed 400 Khz. This was reportedly too fast for several users. As there doesn't seem to be an ideal frequency which-works-for-all, Pierre suggested to let the driver try several frequencies. This patch implements that idea. It will try mmc-initialization using several frequencies from an array 400, 300, 200 and 100. In case SDIO is broken, it'll still try to detect SDMEM, also at different freqs. Signed-off-by:
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Jaehoon Chung authored
When a controller requires SDHCI_QUIRK_BROKEN_CARD_DETECTION, we poll for card insertion/removal, and that creates interrupts. There's no need to be doing this if we have a non-removable card. This patch requires cards to be removable before we're willing to set MMC_CAP_NEEDS_POLL. Signed-off-by:
Jaehoon Chung <jh80.chung@samsung.com> Acked-by:
Kyungmin Park <kyungmin.park@samsung.com> Acked-by:
Matt Fleming <matt@console-pimps.org> Acked-by:
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Matt Fleming authored
There are two checks that need to be made when determining whether a card is removable. A host controller may set MMC_CAP_NONREMOVABLE if the controller does not support removing cards (e.g. eMMC), in which case the card is physically non-removable. Also the 'mmc_assume_removable' module parameter can be configured at module load time, in which case the card may be logically non-removable. A helper function keeps the logic in one place so that code always checks both conditions. Because this new function is likely to be called from modules we now need to export the mmc_assume_removable symbol. Signed-off-by:
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