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linux/drivers/mmc/core/host.h

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mmc: refactor host class handling Move basic host class device handling to its own file for clarity. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-19 20:06:24 +08:00
/*
* linux/drivers/mmc/core/host.h
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
* Copyright 2007 Pierre Ossman
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _MMC_CORE_HOST_H
#define _MMC_CORE_HOST_H
mmc: core: First step in cleaning up private mmc header files This is the first step in cleaning up the private mmc header files. In this change we makes sure each header file builds standalone, as that helps to resolve dependencies. While changing this, it also seems reasonable to stop including other headers from inside a header itself which it don't depend upon. Additionally, in some cases such dependencies are better resolved by forward declaring the needed struct. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
2017-01-13 21:14:07 +08:00
mmc: core: Move public functions from host.h to private headers A significant amount of functions are available through the public mmc host.h header file. Let's slim down this public mmc interface, as to prevent users from abusing it, by moving some of the functions to private mmc host.h header file. This change concentrates on moving the functions into private mmc headers, following changes may continue with additional clean-ups. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
2017-01-13 21:14:15 +08:00
#include <linux/mmc/host.h>
mmc: refactor host class handling Move basic host class device handling to its own file for clarity. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-19 20:06:24 +08:00
int mmc_register_host_class(void);
void mmc_unregister_host_class(void);
mmc: add 'enable' and 'disable' methods to mmc host 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: Adrian Hunter <adrian.hunter@nokia.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: Jarkko Lavinen <jarkko.lavinen@nokia.com> Cc: Denis Karpov <ext-denis.2.karpov@nokia.com> Cc: Pierre Ossman <pierre@ossman.eu> Cc: Philip Langdale <philipl@overt.org> Cc: "Madhusudhan" <madhu.cr@ti.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>
2009-09-23 07:44:29 +08:00
mmc: host: Add facility to support re-tuning Currently, there is core support for tuning during initialization. There can also be a need to re-tune periodically (e.g. sdhci) or to re-tune after the host controller is powered off (e.g. after PM runtime suspend / resume) or to re-tune in response to CRC errors. The main requirements for re-tuning are: - ability to enable / disable re-tuning - ability to flag that re-tuning is needed - ability to re-tune before any request - ability to hold off re-tuning if the card is busy - ability to hold off re-tuning if re-tuning is in progress - ability to run a re-tuning timer To support those requirements 7 members are added to struct mmc_host: unsigned int can_retune:1; /* re-tuning can be used */ unsigned int doing_retune:1; /* re-tuning in progress */ unsigned int retune_now:1; /* do re-tuning at next req */ int need_retune; /* re-tuning is needed */ int hold_retune; /* hold off re-tuning */ unsigned int retune_period; /* re-tuning period in secs */ struct timer_list retune_timer; /* for periodic re-tuning */ need_retune is an integer so it can be set without needing synchronization. hold_retune is a integer to allow nesting. Various simple functions are provided to set / clear those variables. Subsequent patches take those functions into use. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-05-07 18:10:12 +08:00
void mmc_retune_enable(struct mmc_host *host);
void mmc_retune_disable(struct mmc_host *host);
void mmc_retune_hold(struct mmc_host *host);
void mmc_retune_release(struct mmc_host *host);
int mmc_retune(struct mmc_host *host);
mmc: core: Move public functions from host.h to private headers A significant amount of functions are available through the public mmc host.h header file. Let's slim down this public mmc interface, as to prevent users from abusing it, by moving some of the functions to private mmc host.h header file. This change concentrates on moving the functions into private mmc headers, following changes may continue with additional clean-ups. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
2017-01-13 21:14:15 +08:00
void mmc_retune_pause(struct mmc_host *host);
void mmc_retune_unpause(struct mmc_host *host);
mmc: core: Export a few functions needed for blkmq support The following functions are needed by the mmc block device driver, once it converts to blkmq, therefore let's export them. mmc_start_bkops() mmc_start_request() mmc_retune_hold_now() mmc_retune_release() Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-09-22 20:36:59 +08:00
static inline void mmc_retune_hold_now(struct mmc_host *host)
{
host->retune_now = 0;
host->hold_retune += 1;
}
mmc: core: Move public functions from host.h to private headers A significant amount of functions are available through the public mmc host.h header file. Let's slim down this public mmc interface, as to prevent users from abusing it, by moving some of the functions to private mmc host.h header file. This change concentrates on moving the functions into private mmc headers, following changes may continue with additional clean-ups. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
2017-01-13 21:14:15 +08:00
static inline void mmc_retune_recheck(struct mmc_host *host)
{
if (host->hold_retune <= 1)
host->retune_now = 1;
}
static inline int mmc_host_cmd23(struct mmc_host *host)
{
return host->caps & MMC_CAP_CMD23;
}
mmc: block: blk-mq: Add support for direct completion For blk-mq, add support for completing requests directly in the ->done callback. That means that error handling and urgent background operations must be handled by recovery_work in that case. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org>
2017-11-29 21:41:07 +08:00
static inline bool mmc_host_done_complete(struct mmc_host *host)
{
return host->caps & MMC_CAP_DONE_COMPLETE;
}
mmc: core: Move public functions from host.h to private headers A significant amount of functions are available through the public mmc host.h header file. Let's slim down this public mmc interface, as to prevent users from abusing it, by moving some of the functions to private mmc host.h header file. This change concentrates on moving the functions into private mmc headers, following changes may continue with additional clean-ups. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
2017-01-13 21:14:15 +08:00
static inline int mmc_boot_partition_access(struct mmc_host *host)
{
return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
}
static inline int mmc_host_uhs(struct mmc_host *host)
{
return host->caps &
(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
mmc: core: Don't try UHS-I mode if 4-bit mode isn't supported Per SD specification physical layer v4.0, section 3.9.4, it says "UHS-I supports only 4-bit mode. Host shall select 4-bit mode by ACMD6. However mmc_sd_init_uhs_card() still go ahead to initialize the cards anyway, whether card or host won't support 4-bit mode. This breaks the platforms which could support UHS-I mode but on some certain boards only support 1-bit mode with a UHS-I card inserted, as all the tuning process is broken due to this. Alternatively, we should check the return value from mmc_set_bus_width() to see if host could finish the request to switch the bus width on its side. But that needs more thing to do than this patch that just bails out early to try high speed mode if 4-bit mode isn't available for whatever reason. And this patch could also fix the same problem for sdio since R4_18V_PRESENT won't be set for ocr when mmc_sdio_init_card() finds mmc_host_uhs() is false. Note that this patch doesn't keep the checking of card->scr.sda_spec3 and comparing card->scr.bus_widths with SD_SCR_BUS_WIDTH_4 within mmc_sd_init_uhs_card() since if the sd cards response with SD_ROCR_S18A, it definitely supports UHS-I mode, which implicitly means these checkings are always true. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-02-27 08:49:25 +08:00
MMC_CAP_UHS_DDR50) &&
host->caps & MMC_CAP_4_BIT_DATA;
mmc: core: Move public functions from host.h to private headers A significant amount of functions are available through the public mmc host.h header file. Let's slim down this public mmc interface, as to prevent users from abusing it, by moving some of the functions to private mmc host.h header file. This change concentrates on moving the functions into private mmc headers, following changes may continue with additional clean-ups. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
2017-01-13 21:14:15 +08:00
}
static inline bool mmc_card_hs200(struct mmc_card *card)
{
return card->host->ios.timing == MMC_TIMING_MMC_HS200;
}
static inline bool mmc_card_ddr52(struct mmc_card *card)
{
return card->host->ios.timing == MMC_TIMING_MMC_DDR52;
}
static inline bool mmc_card_hs400(struct mmc_card *card)
{
return card->host->ios.timing == MMC_TIMING_MMC_HS400;
}
static inline bool mmc_card_hs400es(struct mmc_card *card)
{
return card->host->ios.enhanced_strobe;
}
mmc: refactor host class handling Move basic host class device handling to its own file for clarity. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-19 20:06:24 +08:00
#endif
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