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* mmc: add API to do eMMC hardware partitioningDiego Santa Cruz2015-01-19-0/+155
| | | | | | | | | | | | | | | | | | This adds an API to do hardware partitioning on eMMC devices. The new mmc_hwpart_config() function does the partitioning in one go. As the different attributes and partitioning options on eMMC may be interdependent validation has to be done based on the complete partitioning configuration. The function accepts three modes: - MMC_HWPART_CONF_CHECK: just validates that the configuration is valid. - MMC_HWPART_CONF_SET: validates and sets all the fields in EXT_CSD but without setting the "partitioning completed" bit, and thus is reversible. - MMC_HWPART_CONF_COMPLETE: does everything and is thus not reversible. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: the ext_csd data may be used during init even if reading failedDiego Santa Cruz2015-01-19-1/+3
| | | | | | | | | | The mmc_startup() function uses the ext_csd data even if reading it from the mmc device failed. This bug was introduced in commit bc897b1d4d86597311430dbe7b3e6c807c8c53e5. We now bail out if reading it fails, this should not be a problem as ext_csd was introduced in MMC 4.0 and this code is conditional on MMC >= 4.0. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: eMMC partitioning data is not effective till partitioning completedDiego Santa Cruz2015-01-19-23/+35
| | | | | | | | | | | | | | | | | The eMMC spec says that partitioning is only effective after the PARTITION_SETTING_COMPLETED is set in EXT_CSD (and a power cycle was done, but that we cannot know). Thus the partition sizes and attributes should be ignored when that bit is not set, otherwise the various capacities are not coherent (e.g., the user data capacity will be that of the unpartitioned device while partition sizes would be non-zero). Prescence of non-zero partitioning data is nevertheless still used to activate the high-capacity size definitions (EXT_CSD_ERASE_GROUP_DEF) as it is necessary to set that to write any of the partitioning fields in EXT_CSD, so having partitioning data means someone previously activated that and we should keep it activated. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: read the high capacity WP group size for eMMCDiego Santa Cruz2015-01-19-0/+6
| | | | | | | | Read the eMMC high capacity write protect group size at mmc device initialization. This is useful to correctly partition an eMMC device, as partitions need to be aligned to this size. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: fix erase_grp_size computation with high-capacity size definitionDiego Santa Cruz2015-01-19-2/+1
| | | | | | | | | The erase_grp_size in struct mmc is to be a size in 512-byte sectors but the code used to compute it for eMMC when EXT_CSD_ERASE_GROUP_DEF is enabled computed it as bytes, leading to erase sizes and alignment much larger than what is actually required by the mmc device. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: read the size of eMMC enhanced user data areaDiego Santa Cruz2015-01-19-0/+15
| | | | | | | | This modification reads the size of the eMMC enhanced user data area upon initialization of an mmc device, it will be used later by mmcinfo. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: computation of eMMC GP partition size was missing 512 KiB factorDiego Santa Cruz2015-01-19-0/+1
| | | | Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: incomplete test to switch to high-capacity group size definitionsDiego Santa Cruz2015-01-19-22/+30
| | | | | | | | | | | | | | | | | The eMMC spec mandates that the high-capacity group size definitions should be enabled when the device is partitioned (by setting ERASE_GROUP_DEF in EXT_CSD). The current test to determine when this is required misses a few cases. In particular a device may have been partitioned without setting the enhanced attribute on any partition or partitioning may be completed without creating any extra partitions. This change moves the code to set ERASE_GROUP_DEF to after reading all partition information. It is also enabled when PARTITIONING_SETTING_COMPLETED is set as it is necessary to enable ERASE_GROUP_DEF before setting that bit, so it means that the user previously switched to the high capacity definitions. Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: extend mmcinfo to show enhanced partition attributeDiego Santa Cruz2015-01-19-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | This extends the mmcinfo command's output to show which eMMC partitions have the enhanced attribute set. Note that the eMMC spec says that if the enhanced attribute is supported then the boot and RPMB partitions are of the enhanced type. The output of mmcinfo becomes: Device: OMAP SD/MMC Manufacturer ID: fe OEM: 14e Name: MMC16 Tran Speed: 52000000 Rd Block Len: 512 MMC version 4.41 High Capacity: Yes Capacity: 13.8 GiB Bus Width: 4-bit User Capacity: 13.8 GiB ENH Boot Capacity: 16 MiB ENH RPMB Capacity: 128 KiB ENH GP1 Capacity: 64 MiB ENH GP2 Capacity: 64 MiB ENH Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
* mmc: Fix block length for DDR modeAndrew Gabbasov2014-12-12-0/+6
| | | | | | | | | Block length for write and read commands is fixed to 512 bytes when the card is in Dual Data Rate mode. If block length read from CSD is different, make sure the driver will use correct length in all further calculations and settings. Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
* mmc: Fix Dual Data Rate capability recognitionAndrew Gabbasov2014-12-12-1/+1
| | | | | | | | | Since the driver doesn't work in 1.2V or 1.8V signaling level modes, Dual Data Rate mode can be supported by the driver only if it is supported by the card in regular 3.3V mode. So, check for a particular single bit in card type field. Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
* mmc: Fix handling of bus widths and DDR card capabilitiesAndrew Gabbasov2014-12-12-21/+31
| | | | | | | | | | | | | | | | | | | | | | | If the MMC_MODE_DDR_52MHz flag is set in card capabilities bitmask, it is never cleared, even if switching to DDR mode fails, and if the controller driver uses this flag to check the DDR mode, it can take incorrect actions. Also, DDR related checks in mmc_startup() incorrectly handle the case when the host controller does not support some bus widths (e.g. can't support 8 bits), since the host_caps is checked for DDR bit, but not bus width bits. This fix clearly separates using of card_caps bitmask, having there the flags for the capabilities, that the card can support, and actual operation mode, described outside of card_caps (i.e. bus_width and ddr_mode fields in mmc structure). Separate host controller drivers may need to be updated to use the actual flags. Respectively, the capabilities checks in mmc_startup are made more correct and clear. Also, some clean up is made with errors handling and code syntax layout. Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
* MMC: add MMC_VERSION_5_0Markus Niebel2014-12-12-0/+3
| | | | | Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
* MMC: fix user capacity for partitioned eMMC cardMarkus Niebel2014-12-12-0/+15
| | | | | | | | | | if the card claims to be high capacity and the card is partitioned the capacity shall still be read from ext_csd SEC_COUNT even if the resulting capacity is smaller than 2 GiB Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
* mmc: Cosmetic fix for nicer, aligned device list printoutLubomir Popov2014-12-12-2/+5
| | | | | | | | If print_mmc_devices() was called with a '\n' separator (as done for example by the "mmc list" command), it offset the 2-nd and all subsequent lines by one space. Fixing this. Signed-off-by: Lubomir Popov <l-popov@ti.com>
* mmc: Board-specific MMC power initializationsPaul Kocialkowski2014-12-04-0/+7
| | | | | | | | | Some devices may use non-standard combinations of regulators to power MMC: this allows these devices to provide a board-specific MMC power init function to set everything up in their own way. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Reviewed-by: Tom Rini <trini@ti.com>
* mmc: Fix mmc bus widthMario Schuknecht2014-10-03-2/+3
| | | | | | | | | | | | | After setting the bus width, the extended CSD register is read. Some selected fields are compared with previously read extended CSD register fields. In this comparison the EXT_CSD_ERASE_GROUP_DEF field is compared. But this field is previously written under certain circumstances. And then the comparison fails. Only compare read-only fields. Therefore compare field EXT_CSD_HC_WP_GRP_SIZE instead of field EXT_CSD_ERASE_GROUP_DEF. Signed-off-by: Mario Schuknecht <mario.schuknecht@dresearch-fe.de> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: restore capacity when switching to partition 0Peter Bigot2014-10-03-3/+8
| | | | | | | | | | | | | The capacity and lba for an MMC device with part_num 0 reflects the whole device. When mmc_switch_part() successfully switches to a partition, the capacity is changed to that partition. As partition 0 does not physically exist, attempts to switch back to the whole device will indicate an error, but the capacity setting for the whole device must still be restored to match the partition. Signed-off-by: Peter A. Bigot <pab@pabigot.com> Tested-by: Tom Rini <trini@ti.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: fix ERASE_GRP_DEF handlingHannes Petermaier2014-10-03-0/+2
| | | | | | | | | | | if we set manually this bit on the eMMC card using mmc_switch(...), we also have to set it within our (before read) internal structure 'ext_csd'. Otherwise following checks on this will fail. Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>
* mmc: prevent some warnings with make W=1Jeroen Hofstee2014-07-18-3/+3
| | | | | | | | Add missing prototypes for global functions and make local functions static. cc: panto@antoniou-consulting.com Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
* dirvers: mmc: use __weakJeroen Hofstee2014-07-18-11/+9
| | | | | use weak instead of alias to prevent some clang warnings. Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
* mmc: return meaningful error codes from mmc_select_hwpartStephen Warren2014-06-12-3/+4
| | | | | | | | | | | | Rather than just returning -1 everywhere, try to return something meaningful from mmc_select_hwpart(). Note that most other MMC functions don't do this, including functions called from mmc_select_hwpart(), so I'm not sure how effective this will be. Still, it's one less place with hard-coded -1. Suggested-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* Merge branch 'u-boot-samsung/master' into 'u-boot-arm/master'Albert ARIBAUD2014-06-02-3/+13
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| * mmc: support the DDR mode for eMMCJaehoon Chung2014-05-16-3/+13
| | | | | | | | | | | | | | Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Tested-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| * mmc: remove the unnecessary define and fix the wrong bit controlJaehoon Chung2014-05-16-1/+1
| | | | | | | | | | | | | | | | Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Lukasz Majeski <l.majewski@samsung.com> Tested-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* | mmc: provide a select_hwpart implementation for get_device()Stephen Warren2014-05-23-0/+26
| | | | | | | | | | | | | | | | | | This enables specifying which eMMC HW partition to target for any U-Boot command that uses the generic get_partition() function to parse its command-line arguments. Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Stephen Warren <swarren@nvidia.com>
* | mmc: Handle switch error status bit in MMC card statusAndrew Gabbasov2014-05-23-1/+3
| | | | | | | | | | | | | | | | | | MMC switch command for unsupported feature (e.g. bus width) sets a switch error bit in card status. This bit should be checked, and, if it's set, no access with new controller settings should be performed. Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
* | mmc: postponed needless timer initializationMateusz Zalega2014-05-23-1/+4
|/ | | | | | | | | | mmc_init() doesn't call get_timer() anymore if MMC is already initialized. <panto> Minor formatting fix. Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Mateusz Zalega <m.zalega@samsung.com>
* mmc: Add 'mmc rst-function' sub-commandTom Rini2014-04-02-0/+12
| | | | | | | | | | | | Some eMMC chips may need the RST_n_FUNCTION bit set to a non-zero value in order for warm reset of the system to work. Details on this being required will be part of the eMMC datasheet. Also add using this command to the dra7xx README. * Whitespace fix by panto Signed-off-by: Tom Rini <trini@ti.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: Split mmc struct, rework mmc initialization (v2)Pantelis Antoniou2014-03-24-35/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The way that struct mmc was implemented was a bit of a mess; configuration and internal state all jumbled up in a single structure. On top of that the way initialization is done with mmc_register leads to a lot of duplicated code in drivers. Typically the initialization got something like this in every driver. struct mmc *mmc = malloc(sizeof(struct mmc)); memset(mmc, 0, sizeof(struct mmc); /* fill in fields of mmc struct */ /* store private data pointer */ mmc_register(mmc); By using the new mmc_create call one just passes an mmc config struct and an optional private data pointer like this: struct mmc = mmc_create(&cfg, priv); All in tree drivers have been updated to the new form, and expect mmc_register to go away before long. Changes since v1: * Use calloc instead of manually calling memset. * Mark mmc_register as deprecated. Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: Remove ops from struct mmc and put in mmc_opsPantelis Antoniou2014-03-24-9/+12
| | | | | | | | | | | | | | | | | Remove the in-structure ops and put them in mmc_ops with a constant pointer to it. This makes the mmc structure smaller as well as conserving code space (in theory). All in-tree drivers are converted as well; this is done in a single patch in order to not break git bisect. Changes since V1: Fix compilation b0rked issue on omap platforms where OMAP_GPIO was not set. Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* cmd_mmc.c: Drop open/close mmc sub-commandsTom Rini2014-02-07-65/+0
| | | | | | | | | | | | | The open and close mmc sub-commands implement a hard-coded set of values specific to the SMDK5250 platform. Remove these commands as what they did can be done instead with a series of mmc dev / bootpart / bootbus commands instead now. Cc: Amar <amarendra.xt@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Tom Rini <trini@ti.com> Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* cmd_mmc.c: Add bootbus mmc sub-commandTom Rini2014-02-07-0/+21
| | | | | | | | | | Add a bootbus sub-command to the mmc command to allow for setting the boot_bus_width, reset_boot_bus_width and boot_mode fields of BOOT_BUS_WIDTH (EXT_CSD[177]). Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Tom Rini <trini@ti.com> Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* cmd_mmc.c: Add 'partconf' command to mmcTom Rini2014-02-07-0/+21
| | | | | | | | | | | | | | Add a partconf sub-command to the mmc command to allow for setting the boot_ack, boot_partition and partition_access fields of PARTITION_CONFIG (formerly BOOT_CONFIG, EXT_CSD[179]). Part of this requires changing the check for 'part' from an strncmp to a strcmp, like the rest of the sub-commands. Cc: Andy Fleming <afleming@gmail.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Tom Rini <trini@ti.com> Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: set rca to 1 for MMC cardsStephen Warren2014-02-07-1/+1
| | | | | | | | | | U-Boot currently sets MMC cards' RCA register to 0. This value is reserved according to the specification. Use a value of 1 instead, just like the Linux kernel. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: add setdsr supportMarkus Niebel2014-01-09-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The eMMC and the SD-Card specifications describe the optional SET_DSR command. During measurements at our lab we found that some cards implementing this feature having really strong driver strengts per default. This can lead to voltage peaks above the specification of the host on signal edges for data sent from a card to the host. Since availability of a given card type may be shorter than the time a certain hardware will be produced it is useful to have support for this command (Alternative would be changing termination resistors and adapting the driver strength of the host to the used card.) Following proposal for an implementation: - new field that reflects CSD field DSR_IMP in struct mmc - new field for design specific DSR value in struct mmc - board code can set DSR value in mmc struct just after registering an controller - mmc_startup sends the the stored DSR value before selecting a card, if DSR_IMP is set Additionally the mmc command is extended to make is possible to play around with different DSR values. The concept was tested on a i.MX53 based platform using a Micron eMMC card where the default DSR is 0x0400 (12mA) but in our design 0x0100 (0x0100) were enough. To use this feature for instance on a mx53loco one have to add a call to mmc_set_dsr() in board_mmc_init() after calling fsl_esdhc_initialize() for the eMMC. Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: Fix erase_grp_size for partitioned cardOliver Metz2013-10-31-4/+13
| | | | | | | | EXT_CSD_ERASE_GROUP_DEF is lost every time after a reset or power off. Set it if device has enhanced partitions. Signed-off-by: Oliver Metz <oliver@freetz.org> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: don't support write & erase for SPL buildsPaul Burton2013-09-20-182/+4
| | | | | | | | | | For SPL builds this is just dead code since we'll only need to read. Eliminating it results in a significant size reduction for the SPL binary, which may be critical for certain platforms where the binary size is highly constrained. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* mmc: don't call *printf or puts when SPL & !CONFIG_SPL_LIBCOMMON_SUPPORTPaul Burton2013-09-17-0/+36
| | | | | | | | If we don't have CONFIG_SPL_LIBCOMMON_SUPPORT defined then stdio & *printf functions are unavailable & calling them will cause a link failure. Signed-off-by: Paul Burton <paul.burton@imgtec.com>
* mmc: Remove unused variable backup from mmc_send_cmd()Oleksandr Tyshchenko2013-09-17-3/+0
| | | | | | | | Do not call a memset for unused variable backup every time. Remove unused variable from function. Signed-off-by: Oleksandr Tyshchenko <oleksandr.tyshchenko@ti.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
* powerpc: mpc85xx: Support booting from SD Card with SPLYing Zhang2013-08-20-0/+2
| | | | | | | | | | | | | | | | The code from the internal on-chip ROM. It loads the final uboot image into DDR, then jump to it to begin execution. The SPL's size is sizeable, the maximum size must not exceed the size of L2 SRAM. It initializes the DDR through SPD code, and copys final uboot image to DDR. So there are two stage uboot images: * spl_boot, 96KB size. The env variables are copied to L2 SRAM, so that ddr spd code can get the interleaving mode setting in env. It loads final uboot image from offset 96KB. * final uboot image, size is variable depends on the functions enabled. Signed-off-by: Ying Zhang <b40530@freescale.com> Acked-by: York Sun <yorksun@freescale.com>
* Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk2013-07-24-17/+1
| | | | | | Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
* Fix block device accesses beyond 2TiBSascha Silbe2013-06-26-8/+9
| | | | | | | | | | | | | | | | | | With CONFIG_SYS_64BIT_LBA, lbaint_t gets defined as a 64-bit type, which is required to represent block numbers for storage devices that exceed 2TiB (the block size usually is 512B), e.g. recent hard drives. For some obscure reason, the current U-Boot code uses lbaint_t for the number of blocks to read (a rather optimistic estimation of how RAM sizes will evolve), but not for the starting address. Trying to access blocks beyond the 2TiB boundary will simply wrap around and read a block within the 0..2TiB range. We now use lbaint_t for block start addresses, too. This required changes to all block drivers as the signature of block_read(), block_write() and block_erase() in block_dev_desc_t changed. Signed-off-by: Sascha Silbe <t-uboot@infra-silbe.de>
* Merge branch 'master' of git://git.denx.de/u-boot-armTom Rini2013-06-22-0/+134
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| * Merge branch 'u-boot-samsung/master' into 'u-boot-arm/master'Albert ARIBAUD2013-06-19-0/+134
| |\ | | | | | | | | | | | | Conflicts: spl/Makefile
| | * MMC: APIs to support resize of EMMC boot partitionAmar2013-06-13-0/+134
| | | | | | | | | | | | | | | | | | | | | This patch adds APIs to access(open / close) and to resize boot partiton of EMMC. Signed-off-by: Amar <amarendra.xt@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* | | mmc: report capacity for the selected partitionStephen Warren2013-06-13-7/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enhance the MMC core to calculate the size of each MMC partition, and update mmc->capacity whenever a partition is selected. This causes: mmc dev 0 1 ; mmcinfo ... to report the size of the currently selected partition, rather than always reporting the size of the user partition. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
* | | mmc write bug fixRuud Commandeur2013-06-13-3/+5
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a bug related to mmc writes. When doing fatwrites on an SD-Card, MMC bus problems can occur. Depending on the size of the file, "MMC0: Bus busy timeout!" is reported, resulting in an SD-Card that is no longer responding. It appears to be, that set_cluster can be called with a size being zero. That can be with a file that has a size being an exact multiple (including 0) of the clustersize, but also for files that are smaller than the size of one cluster. The same problem occurs if the "mmc write" command is given with a block count being 0. By adding a check for the block count being zero in mmc_write_blocks (drivers/mmc.c), this problem is solved. Signed-off-by: Ruud Commandeur <rcommandeur@clb.nl> Cc: Tom Rini <trini@ti.com> Cc: Benoît Thébaudeau <benoit.thebaudeau@advansee.com> Cc: Mats Karrman <Mats.Karrman@tritech.se> Cc: Andy Fleming <afleming@gmail.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
* | mmc: Split device init to decouple OCR-polling delayChe-Liang Chiou2013-05-06-32/+105
|/ | | | | | | | | | | | | | | | | | | Most of time that MMC driver spends on initializing a device is polling OCR (operation conditions register). To decouple this polling loop, device init is split into two parts: The first part fires the OCR query command, and the second part polls the result. So the caller is now no longer bound to the OCR-polling delay; he may fire the query, go somewhere and then come back later for the result. To use this, call mmc_set_preinit() on any device which needs this. This can save significant amounts of time on boot (e.g. 200ms) by hiding the MMC init time behind other init. Signed-off-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
* part/dev_desc: Add log2 of blocksize to block_dev_desc data structEgbert Eich2013-05-01-0/+1
| | | | | | | | | | log2 of the device block size serves as the shift value used to calculate the block number to read in file systems when implementing avaiable block sizes. It is needed quite often in file systems thus it is pre-calculated and stored in the block device descriptor. Signed-off-by: Egbert Eich <eich@suse.com>
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