145 lines
5.4 KiB
C
145 lines
5.4 KiB
C
/****************************************************************************
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* drivers/mmcsd/mmcsd.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __DRIVERS_MMCSD_MMCSD_H
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#define __DRIVERS_MMCSD_MMCSD_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/sdio.h>
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#include <stdint.h>
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#include <debug.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Enable excessive debug options */
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#undef CONFIG_MMCSD_DUMPALL /* MUST BE DEFINED MANUALLY */
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#if !defined(CONFIG_DEBUG_INFO) || !defined(CONFIG_DEBUG_FS)
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# undef CONFIG_MMCSD_DUMPALL
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#endif
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#define MMCSD_PART_COUNT 8
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/* Card type */
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#define MMCSD_CARDTYPE_UNKNOWN 0 /* Unknown card type */
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#define MMCSD_CARDTYPE_MMC 1 /* Bit 0: MMC card */
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#define MMCSD_CARDTYPE_SDV1 2 /* Bit 1: SD version 1.x */
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#define MMCSD_CARDTYPE_SDV2 4 /* Bit 2: SD version 2.x with byte addressing */
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#define MMCSD_CARDTYPE_BLOCK 8 /* Bit 3: SD version 2.x or MMC with block addressing */
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#define IS_MMC(t) (((t) & MMCSD_CARDTYPE_MMC) != 0)
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#define IS_SD(t) (((t) & (MMCSD_CARDTYPE_SDV1|MMCSD_CARDTYPE_SDV2)) != 0)
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#define IS_SDV1(t) (((t) & MMCSD_CARDTYPE_SDV1) != 0)
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#define IS_SDV2(t) (((t) & MMCSD_CARDTYPE_SDV2) != 0)
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#define IS_BLOCK(t) (((t) & MMCSD_CARDTYPE_BLOCK) != 0)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct mmcsd_part_s
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{
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FAR struct mmcsd_state_s *priv;
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blkcnt_t nblocks; /* Number of blocks */
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};
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/* This structure is contains the unique state of the MMC/SD block driver */
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struct mmcsd_state_s
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{
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FAR struct sdio_dev_s *dev; /* The SDIO device bound to this instance */
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uint8_t crefs; /* Open references on the driver */
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mutex_t lock; /* Assures mutually exclusive access to the slot */
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int minor; /* Device number */
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struct mmcsd_part_s part[MMCSD_PART_COUNT]; /* Partition data */
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uint32_t partnum; /* Partition number */
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/* Status flags */
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uint8_t probed:1; /* true: mmcsd_probe() discovered a card */
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uint8_t widebus:1; /* true: Wide 4-bit bus selected */
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uint8_t mediachanged:1; /* true: Media changed since last check */
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uint8_t wrbusy:1; /* true: Last transfer was a write, card may be busy */
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uint8_t wrprotect:1; /* true: Card is write protected (from CSD) */
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uint8_t locked:1; /* true: Media is locked (from R1) */
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uint8_t dsrimp:1; /* true: card supports CMD4/DSR setting (from CSD) */
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#ifdef CONFIG_SDIO_DMA
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uint8_t dma:1; /* true: hardware supports DMA */
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#endif
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uint8_t mode:4; /* (See MMCSDMODE_* definitions) */
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uint8_t type:4; /* Card type (See MMCSD_CARDTYPE_* definitions) */
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uint8_t buswidth:4; /* Bus widths supported (SD only) */
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uint8_t cmd23support:1; /* CMD23 supported (SD only) */
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sdio_capset_t caps; /* SDIO driver capabilities/limitations */
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uint32_t cid[4]; /* CID register */
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uint32_t csd[4]; /* CSD register */
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uint16_t selblocklen; /* The currently selected block length */
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uint16_t rca; /* Relative Card Address (RCS) register */
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/* Memory card geometry (extracted from the CSD) */
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uint8_t blockshift; /* Log2 of blocksize */
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uint16_t blocksize; /* Read block length (== block size) */
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};
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/****************************************************************************
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* Public Functions Definitions
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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#ifdef CONFIG_MMCSD_PROCFS
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void mmcsd_initialize_procfs(void);
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#endif
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#ifdef CONFIG_MMCSD_DUMPALL
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# define mmcsd_dumpbuffer(m,b,l) finfodumpbuffer(m,b,l)
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#else
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# define mmcsd_dumpbuffer(m,b,l)
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#endif
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#if defined(CONFIG_DEBUG_INFO) && defined(CONFIG_DEBUG_FS)
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EXTERN void mmcsd_dmpcsd(FAR const uint8_t *csd, uint8_t cardtype);
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#else
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# define mmcsd_dmpcsd(csd,cadtype)
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __DRIVERS_MMCSD_MMCSD_H */
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