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2017-04-24mmc: sdhci-pci: Conditionally compile pm sleep functionsAdrian Hunter3-0/+14
It is confusing to have some parts of suspend / resume under conditional compilation and some parts not. Use conditional compilation everywhere. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci-pci: Do not use suspend/resume callbacks with runtime pmAdrian Hunter1-12/+0
Do not use suspend/resume callbacks with runtime pm. It doesn't make sense and isn't being used, so remove. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci-pci: Let devices define how to add the hostAdrian Hunter2-1/+5
SDHCI provides more flexibility than simply calling sdhci_add_host(). Make that available by allowing devices to specify their own ->add_host() function. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Add CQE supportAdrian Hunter2-3/+146
Add an interrupt hook and helper functions for enabling, disabling and delivering interrupts to a CQE. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Factor out sdhci_set_default_irqsAdrian Hunter1-8/+13
Factor out sdhci_set_default_irqs(). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Add sdhci_cleanup_hostAdrian Hunter2-11/+27
Add sdhci_cleanup_host() to cleanup __sdhci_add_host(). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Get rid of 'extern' in header fileAdrian Hunter1-17/+15
Get rid of unnecessary 'extern' in header file. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Export sdhci_dumpregsAdrian Hunter2-1/+4
Export sdhci_dumpregs so that it can be called by drivers. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Improve register dump print formatAdrian Hunter1-51/+53
Ensure all prints start with the mmc host name, and the text all lines up. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Use sdhci_readl() not readl() in sdhci_dumpregs()Adrian Hunter1-5/+5
Use sdhci io wrappers consistently. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Add response register to register dumpAdrian Hunter1-0/+7
Add response register to register dump. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Improve debug print formatAdrian Hunter1-16/+12
Ensure all debug prints start with the mmc host name. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Reduce spin lock usage in sdhci_execute_tuningAdrian Hunter1-22/+14
Tuning execution is already synchronized with respect to other host operations by upper layers "claiming" the host, which also takes care of runtime pm. There can be no requests in progress. Retain the spin lock usage only for ensuring that sending tuning commands is synchronized with respect to the interrupt handler. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Do not use spin lock in set_ios pathsAdrian Hunter7-37/+1
The spin lock is not necessary in set_ios. Anything that is racing with changes to the I/O state is already broken. The mmc core already provides synchronization via "claiming" the host. So remove spin_lock and friends from sdhci_set_ios and related callbacks. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Remove ->select_drive_strength() callbackAdrian Hunter4-42/+0
Drivers can use the host operation directly, so remove this now unused callback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci-pci: Use ACPI DSM to get driver strength for some Intel devicesAdrian Hunter2-66/+14
Make use of an Intel ACPI _DSM that provides eMMC driver strength. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci-pci: Don't re-tune with runtime pm for some Intel devicesAdrian Hunter1-0/+90
Make use of an Intel ACPI _DSM that indicates if re-tuning is needed after D3. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci-pci: Let devices define their own private dataAdrian Hunter2-1/+9
Let devices define their own private data to facilitate device-specific operations. The size of the private structure is specified in the sdhci_pci_fixes structure, then sdhci_pci_probe_slot() will allocate extra space for it, and sdhci_pci_priv() can be used to get a reference to it. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Let drivers decide whether to use mmc_retune_needed() with pmAdrian Hunter15-11/+73
Devices might save and restore tuning values so that re-tuning might not be needed after a pm transition. Let drivers decide by pushing the mmc_retune_needed() logic down to them. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: sdhci: Optimize delay loopsAdrian Hunter1-10/+9
The delay loops for reset and clock enable always take at least 1 ms because they use mdelay(1). However they can take a lot less time e.g. less than 50us. Use ktime and reduce the delay to 10 microseconds per loop. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2017-04-24mmc: bcm2835: Add new driver for the sdhost controller.Eric Anholt3-0/+1480
The 2835 has two SD controllers: The Arasan sdhci controller (supported by the iproc driver) and a custom sdhost controller. This patch adds a driver for the latter. The sdhci controller supports both sdcard and sdio. The sdhost controller supports the sdcard only, but has better performance. Also note that the rpi3 has sdio wifi, so driving the sdcard with the sdhost controller allows to use the sdhci controller for wifi support. The configuration is done by devicetree via pin muxing. Both SD controller are available on the same pins (2 pin groups = pin 22 to 27 + pin 48 to 53). So it's possible to use both SD controllers at the same time with different pin groups. The code was originally written by Phil Elwell in the downstream Rasbperry Pi tree. In preparation for the upstream merge it was cleaned up and the code base was moderized by Eric Anholt, Stefan Wahren and Gerd Hoffmann. Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>