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/*
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* linux / drivers / mmc / core / mmc_ops . h
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*
* Copyright 2006 - 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 as published by
* the Free Software Foundation ; either version 2 of the License , or ( at
* your option ) any later version .
*/
# ifndef _MMC_MMC_OPS_H
# define _MMC_MMC_OPS_H
int mmc_select_card ( struct mmc_card * card ) ;
int mmc_deselect_cards ( struct mmc_host * host ) ;
int mmc_go_idle ( struct mmc_host * host ) ;
int mmc_send_op_cond ( struct mmc_host * host , u32 ocr , u32 * rocr ) ;
int mmc_all_send_cid ( struct mmc_host * host , u32 * cid ) ;
int mmc_set_relative_addr ( struct mmc_card * card ) ;
int mmc_send_csd ( struct mmc_card * card , u32 * csd ) ;
int mmc_send_ext_csd ( struct mmc_card * card , u8 * ext_csd ) ;
int mmc_send_status ( struct mmc_card * card , u32 * status ) ;
MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 20:11:32 +04:00
int mmc_send_cid ( struct mmc_host * host , u32 * cid ) ;
int mmc_spi_read_ocr ( struct mmc_host * host , int highcap , u32 * ocrp ) ;
int mmc_spi_set_crc ( struct mmc_host * host , int use_crc ) ;
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int mmc_bus_test ( struct mmc_card * card , u8 bus_width ) ;
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int mmc_send_hpi_cmd ( struct mmc_card * card , u32 * status ) ;
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# endif
