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freebsd-dev/sys/dev/altera/sdcard/altera_sdcard.h
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _DEV_ALTERA_SDCARD_H_
#define _DEV_ALTERA_SDCARD_H_
#define ALTERA_SDCARD_CSD_SIZE 16
struct altera_sdcard_csd {
uint8_t csd_data[ALTERA_SDCARD_CSD_SIZE];
} __aligned(2); /* CSD is read in 16-bit chunks, so align to match. */
struct altera_sdcard_softc {
device_t as_dev;
int as_unit;
struct resource *as_res;
int as_rid;
struct mtx as_lock;
struct cv as_condvar;
int as_state;
int as_flags;
struct disk *as_disk;
struct taskqueue *as_taskqueue;
struct timeout_task as_task;
/*
* Fields relating to in-progress and pending I/O, if any.
*/
struct bio_queue_head as_bioq;
struct bio *as_currentbio;
u_int as_retriesleft;
/*
* Infrequently changing fields cached from the SD Card IP Core.
*/
struct altera_sdcard_csd as_csd;
uint8_t as_csd_structure; /* CSD version. */
uint64_t as_mediasize;
};
#define ALTERA_SDCARD_LOCK(sc) mtx_lock(&(sc)->as_lock)
#define ALTERA_SDCARD_LOCK_ASSERT(sc) mtx_assert(&(sc)->as_lock, MA_OWNED)
#define ALTERA_SDCARD_LOCK_DESTROY(sc) mtx_destroy(&(sc)->as_lock)
#define ALTERA_SDCARD_LOCK_INIT(sc) mtx_init(&(sc)->as_lock, \
"altera_sdcard", NULL, MTX_DEF)
#define ALTERA_SDCARD_UNLOCK(sc) mtx_unlock(&(sc)->as_lock)
#define ALTERA_SDCARD_CONDVAR_DESTROY(sc) cv_destroy(&(sc)->as_condvar)
#define ALTERA_SDCARD_CONDVAR_INIT(sc) cv_init(&(sc)->as_condvar, \
"altera_sdcard_detach_wait")
#define ALTERA_SDCARD_CONDVAR_SIGNAL(dc) cv_signal(&(sc)->as_condvar)
#define ALTERA_SDCARD_CONDVAR_WAIT(sc) cv_wait(&(sc)->as_condvar, \
&(sc)->as_lock)
/*
* States an instance can be in at any given moment.
*/
#define ALTERA_SDCARD_STATE_NOCARD 1 /* No card inserted. */
#define ALTERA_SDCARD_STATE_BADCARD 2 /* Card bad/not supported. */
#define ALTERA_SDCARD_STATE_IDLE 3 /* Card present but idle. */
#define ALTERA_SDCARD_STATE_IO 4 /* Card in I/O currently. */
#define ALTERA_SDCARD_STATE_DETACHED 5 /* Driver is detaching. */
/*
* Different timeout intervals based on state. When just looking for a card
* status change, check twice a second. When we're actively waiting on I/O
* completion, check every millisecond.
*/
#define ALTERA_SDCARD_TIMEOUT_NOCARD (hz/2)
#define ALTERA_SDCARD_TIMEOUT_IDLE (hz/2)
#define ALTERA_SDCARD_TIMEOUT_IO (1)
#define ALTERA_SDCARD_TIMEOUT_IOERROR (hz/5)
/*
* Maximum number of retries on an I/O.
*/
#define ALTERA_SDCARD_RETRY_LIMIT 10
/*
* Driver status flags.
*/
#define ALTERA_SDCARD_FLAG_DETACHREQ 0x00000001 /* Detach requested. */
#define ALTERA_SDCARD_FLAG_IOERROR 0x00000002 /* Error in progress. */
/*
* Functions for performing low-level register and memory I/O to/from the SD
* Card IP Core. In general, only code in altera_sdcard_io.c is aware of the
* hardware interface.
*/
uint16_t altera_sdcard_read_asr(struct altera_sdcard_softc *sc);
int altera_sdcard_read_csd(struct altera_sdcard_softc *sc);
int altera_sdcard_io_complete(struct altera_sdcard_softc *sc,
uint16_t asr);
void altera_sdcard_io_start(struct altera_sdcard_softc *sc,
struct bio *bp);
/*
* Constants for interpreting the SD Card Card Specific Data (CSD) register.
*/
#define ALTERA_SDCARD_CSD_STRUCTURE_BYTE 15
#define ALTERA_SDCARD_CSD_STRUCTURE_MASK 0xc0 /* 2 bits */
#define ALTERA_SDCARD_CSD_STRUCTURE_RSHIFT 6
#define ALTERA_SDCARD_CSD_READ_BL_LEN_BYTE 10
#define ALTERA_SDCARD_CSD_READ_BL_LEN_MASK 0x0f /* 4 bits */
/*
* C_SIZE is a 12-bit field helpfully split over three differe bytes of CSD
* data. Software ease of use was not a design consideration.
*/
#define ALTERA_SDCARD_CSD_C_SIZE_BYTE0 7
#define ALTERA_SDCARD_CSD_C_SIZE_MASK0 0xc0 /* top 2 bits */
#define ALTERA_SDCARD_CSD_C_SIZE_RSHIFT0 6
#define ALTERA_SDCARD_CSD_C_SIZE_BYTE1 8
#define ALTERA_SDCARD_CSD_C_SIZE_MASK1 0xff /* 8 bits */
#define ALTERA_SDCARD_CSD_C_SIZE_LSHIFT1 2
#define ALTERA_SDCARD_CSD_C_SIZE_BYTE2 9
#define ALTERA_SDCARD_CSD_C_SIZE_MASK2 0x03 /* bottom 2 bits */
#define ALTERA_SDCARD_CSD_C_SIZE_LSHIFT2 10
#define ALTERA_SDCARD_CSD_C_SIZE_MULT_BYTE0 5
#define ALTERA_SDCARD_CSD_C_SIZE_MULT_MASK0 0x80 /* top 1 bit */
#define ALTERA_SDCARD_CSD_C_SIZE_MULT_RSHIFT0 7
#define ALTERA_SDCARD_CSD_C_SIZE_MULT_BYTE1 6
#define ALTERA_SDCARD_CSD_C_SIZE_MULT_MASK1 0x03 /* bottom 2 bits */
#define ALTERA_SDCARD_CSD_C_SIZE_MULT_LSHIFT1 1
/*
* I/O register/buffer offsets, from Table 4.1.1 in the Altera University
* Program SD Card IP Core specification.
*/
#define ALTERA_SDCARD_OFF_RXTX_BUFFER 0 /* 512-byte I/O buffer */
#define ALTERA_SDCARD_OFF_CID 512 /* 16-byte Card ID number */
#define ALTERA_SDCARD_OFF_CSD 528 /* 16-byte Card Specific Data */
#define ALTERA_SDCARD_OFF_OCR 544 /* Operating Conditions Reg */
#define ALTERA_SDCARD_OFF_SR 548 /* SD Card Status Register */
#define ALTERA_SDCARD_OFF_RCA 552 /* Relative Card Address Reg */
#define ALTERA_SDCARD_OFF_CMD_ARG 556 /* Command Argument Register */
#define ALTERA_SDCARD_OFF_CMD 560 /* Command Register */
#define ALTERA_SDCARD_OFF_ASR 564 /* Auxiliary Status Register */
#define ALTERA_SDCARD_OFF_RR1 568 /* Response R1 */
/*
* The Altera IP Core provides a 16-bit "Additional Status Register" (ASR)
* beyond those described in the SD Card specification that captures IP Core
* transaction state, such as whether the last command is in progress, the
* card has been removed, etc.
*/
#define ALTERA_SDCARD_ASR_CMDVALID 0x0001
#define ALTERA_SDCARD_ASR_CARDPRESENT 0x0002
#define ALTERA_SDCARD_ASR_CMDINPROGRESS 0x0004
#define ALTERA_SDCARD_ASR_SRVALID 0x0008
#define ALTERA_SDCARD_ASR_CMDTIMEOUT 0x0010
#define ALTERA_SDCARD_ASR_CMDDATAERROR 0x0020
/*
* The Altera IP Core claims to provide a 16-bit "Response R1" register (RR1)
* to provide more detailed error reporting when a read or write fails.
*
* XXXRW: The specification claims that this field is 16-bit, but then
* proceeds to define values as though it is 32-bit. In practice, 16-bit
* seems more likely as the register is not 32-bit aligned.
*/
#define ALTERA_SDCARD_RR1_INITPROCRUNNING 0x0100
#define ALTERA_SDCARD_RR1_ERASEINTERRUPTED 0x0200
#define ALTERA_SDCARD_RR1_ILLEGALCOMMAND 0x0400
#define ALTERA_SDCARD_RR1_COMMANDCRCFAILED 0x0800
#define ALTERA_SDCARD_RR1_ADDRESSMISALIGNED 0x1000
#define ALTERA_SDCARD_RR1_ADDRBLOCKRANGE 0x2000
/*
* Not all RR1 values are "errors" per se -- check only for the ones that are
* when performing error handling.
*/
#define ALTERA_SDCARD_RR1_ERRORMASK \
(ALTERA_SDCARD_RR1_ERASEINTERRUPTED | ALTERA_SDCARD_RR1_ILLEGALCOMMAND | \
ALTERA_SDCARD_RR1_COMMANDCRCFAILED | ALTERA_SDCARD_RR1_ADDRESSMISALIGNED |\
ALTERA_SDCARD_RR1_ADDRBLOCKRANGE)
/*
* Although SD Cards may have various sector sizes, the Altera IP Core
* requires that I/O be done in 512-byte chunks.
*/
#define ALTERA_SDCARD_SECTORSIZE 512
/*
* SD Card commands used in this driver.
*/
#define ALTERA_SDCARD_CMD_SEND_RCA 0x03 /* Retrieve card RCA. */
#define ALTERA_SDCARD_CMD_SEND_CSD 0x09 /* Retrieve CSD register. */
#define ALTERA_SDCARD_CMD_SEND_CID 0x0A /* Retrieve CID register. */
#define ALTERA_SDCARD_CMD_READ_BLOCK 0x11 /* Read block from disk. */
#define ALTERA_SDCARD_CMD_WRITE_BLOCK 0x18 /* Write block to disk. */
/*
* Functions exposed by the device driver core to newbus(9) bus attachment
* implementations.
*/
void altera_sdcard_attach(struct altera_sdcard_softc *sc);
void altera_sdcard_detach(struct altera_sdcard_softc *sc);
void altera_sdcard_task(void *arg, int pending);
/*
* Functions exposed by the device driver core to the disk(9) front-end.
*/
void altera_sdcard_start(struct altera_sdcard_softc *sc);
/*
* Functions relating to the implementation of disk(9) KPIs for the SD Card
* driver.
*/
void altera_sdcard_disk_insert(struct altera_sdcard_softc *sc);
void altera_sdcard_disk_remove(struct altera_sdcard_softc *sc);
extern devclass_t altera_sdcard_devclass;
#endif /* _DEV_ALTERA_SDCARD_H_ */
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