/****************************************************************************
* arch/arm/src/sam3u/sam3u_sdio.c
*
* Copyright (C) 2010, 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <string.h>
#include <assert.h>
#include <debug.h>
#include <wdog.h>
#include <errno.h>
#include <nuttx/clock.h>
#include <nuttx/arch.h>
#include <nuttx/sdio.h>
#include <nuttx/wqueue.h>
#include <nuttx/mmcsd.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "sam3u_internal.h"
#include "sam3u_dmac.h"
#include "sam3u_pmc.h"
#include "sam3u_hsmci.h"
#if CONFIG_SAM3U_HSMCI
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_SAM3U_DMA
# warning "HSMCI driver requires CONFIG_SAM3U_DMA"
#endif
#ifndef CONFIG_SCHED_WORKQUEUE
# error "Callback support requires CONFIG_SCHED_WORKQUEUE"
#endif
#ifndef CONFIG_SDIO_BLOCKSETUP
# error "This driver requires CONFIG_SDIO_BLOCKSETUP"
#endif
#ifndef CONFIG_HSMCI_PRI
# define CONFIG_HSMCI_PRI NVIC_SYSH_PRIORITY_DEFAULT
#endif
#if !defined(CONFIG_DEBUG_FS) || !defined(CONFIG_DEBUG_VERBOSE)
# undef CONFIG_HSMCI_CMDDEBUG
# undef CONFIG_HSMCI_XFRDEBUG
#endif
#ifdef CONFIG_SAM3U_HSMCI_RDPROOF
# ifdef CONFIG_SAM3U_HSMCI_WRPROOF
# define HSMCU_PROOF_BITS (HSMCI_MR_RDPROOF | HSMCI_MR_WRPROOF)
# else
# define HSMCU_PROOF_BITS HSMCI_MR_RDPROOF
# endif
#else
# ifdef CONFIG_SAM3U_HSMCI_WRPROOF
# define HSMCU_PROOF_BITS HSMCI_MR_WRPROOF
# else
# define HSMCU_PROOF_BITS (0)
# endif
#endif
/* Timing */
#define HSMCI_CMDTIMEOUT (100000)
#define HSMCI_LONGTIMEOUT (0x7fffffff)
/* Big DTIMER setting */
#define HSMCI_DTIMER_DATATIMEOUT (0x000fffff)
/* DMA configuration flags */
#define DMA_FLAGS \
(DMACH_FLAG_FIFO_8BYTES | DMACH_FLAG_FIFOCFG_LARGEST | \
(DMACHAN_PID_MCI0 << DMACH_FLAG_PERIPHPID_SHIFT) | \
DMACH_FLAG_PERIPHH2SEL | DMACH_FLAG_PERIPHISPERIPH | \
DMACH_FLAG_PERIPHWIDTH_32BITS | DMACH_FLAG_PERIPHCHUNKSIZE_1 | \
DMACH_FLAG_MEMWIDTH_32BITS | DMACH_FLAG_MEMINCREMENT | DMACH_FLAG_MEMCHUNKSIZE_4)
/* Status errors:
*
* HSMCI_INT_UNRE Data transmit underrun
* HSMCI_INT_OVRE Data receive overrun
* HSMCI_INT_BLKOVRE DMA receive block overrun error
* HSMCI_INT_CSTOE Completion signal time-out error (see HSMCI_CSTOR)
* HSMCI_INT_DTOE Data time-out error (see HSMCI_DTOR)
* HSMCI_INT_DCRCE Data CRC Error
* HSMCI_INT_RTOE Response Time-out
* HSMCI_INT_RENDE Response End Bit Error
* HSMCI_INT_RCRCE Response CRC Error
* HSMCI_INT_RDIRE Response Direction Error
* HSMCI_INT_RINDE Response Index Error
*/
#define HSMCI_STATUS_ERRORS \
( HSMCI_INT_UNRE | HSMCI_INT_OVRE | HSMCI_INT_BLKOVRE | HSMCI_INT_CSTOE | \
HSMCI_INT_DTOE | HSMCI_INT_DCRCE | HSMCI_INT_RTOE | HSMCI_INT_RENDE | \
HSMCI_INT_RCRCE | HSMCI_INT_RDIRE | HSMCI_INT_RINDE )
/* Response errors:
*
* HSMCI_INT_CSTOE Completion signal time-out error (see HSMCI_CSTOR)
* HSMCI_INT_RTOE Response Time-out
* HSMCI_INT_RENDE Response End Bit Error
* HSMCI_INT_RCRCE Response CRC Error
* HSMCI_INT_RDIRE Response Direction Error
* HSMCI_INT_RINDE Response Index Error
*/
#define HSMCI_RESPONSE_ERRORS \
( HSMCI_INT_CSTOE | HSMCI_INT_RTOE | HSMCI_INT_RENDE | HSMCI_INT_RCRCE | \
HSMCI_INT_RDIRE | HSMCI_INT_RINDE )
#define HSMCI_RESPONSE_NOCRC_ERRORS \
( HSMCI_INT_CSTOE | HSMCI_INT_RTOE | HSMCI_INT_RENDE | HSMCI_INT_RDIRE | \
HSMCI_INT_RINDE )
#define HSMCI_RESPONSE_TIMEOUT_ERRORS \
( HSMCI_INT_CSTOE | HSMCI_INT_RTOE )
/* Data transfer errors:
*
* HSMCI_INT_UNRE Data transmit underrun
* HSMCI_INT_OVRE Data receive overrun
* HSMCI_INT_BLKOVRE DMA receive block overrun error
* HSMCI_INT_CSTOE Completion signal time-out error (see HSMCI_CSTOR)
* HSMCI_INT_DTOE Data time-out error (see HSMCI_DTOR)
* HSMCI_INT_DCRCE Data CRC Error
*/
#define HSMCI_DATA_ERRORS \
( HSMCI_INT_UNRE | HSMCI_INT_OVRE | HSMCI_INT_BLKOVRE | HSMCI_INT_CSTOE | \
HSMCI_INT_DTOE | HSMCI_INT_DCRCE )
#define HSMCI_DATA_TIMEOUT_ERRORS \
( HSMCI_INT_CSTOE | HSMCI_INT_DTOE )
#define HSMCI_DATA_DMARECV_ERRORS \
( HSMCI_INT_OVRE | HSMCI_INT_BLKOVRE | HSMCI_INT_CSTOE | HSMCI_INT_DTOE | \
HSMCI_INT_DCRCE )
#define HSMCI_DATA_DMASEND_ERRORS \
( HSMCI_INT_UNRE | HSMCI_INT_CSTOE | HSMCI_INT_DTOE | HSMCI_INT_DCRCE )
/* Data transfer status and interrupt mask bits.
*
* The XFRDONE flag in the HSMCI_SR indicates exactly when the read or
* write sequence is finished.
*
* 0: A transfer is in progress.
* 1: Command register is ready to operate and the data bus is in the idle state.
*
* DMADONE: DMA Transfer done
*
* 0: DMA buffer transfer has not completed since the last read of HSMCI_SR register.
* 1: DMA buffer transfer has completed.
*/
#define HSMCI_DMARECV_INTS \
( HSMCI_DATA_DMARECV_ERRORS | HSMCI_INT_XFRDONE /* | HSMCI_INT_DMADONE */ )
#define HSMCI_DMASEND_INTS \
( HSMCI_DATA_DMASEND_ERRORS | HSMCI_INT_XFRDONE /* | HSMCI_INT_DMADONE */ )
/* Event waiting interrupt mask bits.
*
* CMDRDY (Command Ready):
*
* 0: A command is in progress
* 1: The last command has been sent. The CMDRDY flag is released 8 bits
* after the end of the card response. Cleared when writing in the HSMCI_CMDR
*/
#define HSMCI_CMDRESP_INTS \
( HSMCI_RESPONSE_ERRORS | HSMCI_INT_CMDRDY )
#define HSMCI_CMDRESP_NOCRC_INTS \
( HSMCI_RESPONSE_NOCRC_ERRORS | HSMCI_INT_CMDRDY )
/* Register logging support */
#ifdef CONFIG_HSMCI_XFRDEBUG
# ifdef CONFIG_DEBUG_DMA
# define SAMPLENDX_BEFORE_SETUP 0
# define SAMPLENDX_BEFORE_ENABLE 1
# define SAMPLENDX_AFTER_SETUP 2
# define SAMPLENDX_END_TRANSFER 3
# define SAMPLENDX_DMA_CALLBACK 4
# define DEBUG_NDMASAMPLES 5
# else
# define SAMPLENDX_BEFORE_SETUP 0
# define SAMPLENDX_AFTER_SETUP 1
# define SAMPLENDX_END_TRANSFER 2
# define DEBUG_NDMASAMPLES 3
# endif
#endif
#ifdef CONFIG_HSMCI_CMDDEBUG
# define SAMPLENDX_AFTER_CMDR 0
# define SAMPLENDX_AT_WAKEUP 1
# define DEBUG_NCMDSAMPLES 2
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure defines the state of the SAM3U HSMCI interface */
struct sam3u_dev_s
{
struct sdio_dev_s dev; /* Standard, base SDIO interface */
/* SAM3U-specific extensions */
/* Event support */
sem_t waitsem; /* Implements event waiting */
sdio_eventset_t waitevents; /* Set of events to be waited for */
uint32_t waitmask; /* Interrupt enables for event waiting */
uint32_t cmdrmask; /* Interrupt enables for this particular cmd/response */
volatile sdio_eventset_t wkupevent; /* The event that caused the wakeup */
WDOG_ID waitwdog; /* Watchdog that handles event timeouts */
/* Callback support */
uint8_t cdstatus; /* Card status */
sdio_eventset_t cbevents; /* Set of events to be cause callbacks */
worker_t callback; /* Registered callback function */
void *cbarg; /* Registered callback argument */
struct work_s cbwork; /* Callback work queue structure */
/* Interrupt mode data transfer support */
uint32_t xfrmask; /* Interrupt enables for data transfer */
/* DMA data transfer support */
bool widebus; /* Required for DMA support */
DMA_HANDLE dma; /* Handle for DMA channel */
};
/* Register logging support */
#if defined(CONFIG_HSMCI_XFRDEBUG) || defined(CONFIG_HSMCI_CMDDEBUG)
struct sam3u_hsmciregs_s
{
uint32_t mr; /* Mode Register */
uint32_t dtor; /* Data Timeout Register */
uint32_t sdcr; /* SD/SDIO Card Register */
uint32_t argr; /* Argument Register */
uint32_t blkr; /* Block Register */
uint32_t cstor; /* Completion Signal Timeout Register */
uint32_t rsp0; /* Response Register 0 */
uint32_t rsp1; /* Response Register 1 */
uint32_t rsp2; /* Response Register 2 */
uint32_t rsp3; /* Response Register 3 */
uint32_t sr; /* Status Register */
uint32_t imr; /* Interrupt Mask Register */
uint32_t dma; /* DMA Configuration Register */
uint32_t cfg; /* Configuration Register */
uint32_t wpmr; /* Write Protection Mode Register */
uint32_t wpsr; /* Write Protection Status Register */
};
#endif
#ifdef CONFIG_HSMCI_XFRDEBUG
struct sam3u_xfrregs_s
{
struct sam3u_hsmciregs_s hsmci;
#ifdef CONFIG_DEBUG_DMA
struct sam3u_dmaregs_s dma;
#endif
};
#endif
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Low-level helpers ********************************************************/
static void sam3u_takesem(struct sam3u_dev_s *priv);
#define sam3u_givesem(priv) (sem_post(&priv->waitsem))
static void sam3u_enablewaitints(struct sam3u_dev_s *priv, uint32_t waitmask,
sdio_eventset_t waitevents);
static void sam3u_disablewaitints(struct sam3u_dev_s *priv, sdio_eventset_t wkupevents);
static void sam3u_enablexfrints(struct sam3u_dev_s *priv, uint32_t xfrmask);
static void sam3u_disablexfrints(struct sam3u_dev_s *priv);
static inline void sam3u_disable(void);
static inline void sam3u_enable(void);
/* Register Sampling ********************************************************/
#if defined(CONFIG_HSMCI_XFRDEBUG) || defined(CONFIG_HSMCI_CMDDEBUG)
static void sam3u_hsmcisample(struct sam3u_hsmciregs_s *regs);
static void sam3u_hsmcidump(struct sam3u_hsmciregs_s *regs, const char *msg);
#endif
#ifdef CONFIG_HSMCI_XFRDEBUG
static void sam3u_xfrsampleinit(void);
static void sam3u_xfrsample(struct sam3u_dev_s *priv, int index);
static void sam3u_xfrdumpone(struct sam3u_dev_s *priv,
struct sam3u_xfrregs_s *regs, const char *msg);
static void sam3u_xfrdump(struct sam3u_dev_s *priv);
#else
# define sam3u_xfrsampleinit()
# define sam3u_xfrsample(priv,index)
# define sam3u_xfrdump(priv)
#endif
#ifdef CONFIG_HSMCI_CMDDEBUG
static void sam3u_cmdsampleinit(void);
static inline void sam3u_cmdsample1(int index3);
static inline void sam3u_cmdsample2(int index, uint32_t sr);
static void sam3u_cmddump(void);
#else
# define sam3u_cmdsampleinit()
# define sam3u_cmdsample1(index)
# define sam3u_cmdsample2(index,sr)
# define sam3u_cmddump()
#endif
/* DMA Helpers **************************************************************/
static void sam3u_dmacallback(DMA_HANDLE handle, void *arg, int result);
/* Data Transfer Helpers ****************************************************/
static void sam3u_eventtimeout(int argc, uint32_t arg);
static void sam3u_endwait(struct sam3u_dev_s *priv, sdio_eventset_t wkupevent);
static void sam3u_endtransfer(struct sam3u_dev_s *priv, sdio_eventset_t wkupevent);
static void sam3u_notransfer(struct sam3u_dev_s *priv);
/* Interrupt Handling *******************************************************/
static int sam3u_interrupt(int irq, void *context);
/* SDIO interface methods ***************************************************/
/* Initialization/setup */
static void sam3u_reset(FAR struct sdio_dev_s *dev);
static uint8_t sam3u_status(FAR struct sdio_dev_s *dev);
static void sam3u_widebus(FAR struct sdio_dev_s *dev, bool enable);
static void sam3u_clock(FAR struct sdio_dev_s *dev,
enum sdio_clock_e rate);
static int sam3u_attach(FAR struct sdio_dev_s *dev);
/* Command/Status/Data Transfer */
static int sam3u_sendcmd(FAR struct sdio_dev_s *dev, uint32_t cmd,
uint32_t arg);
static void sam3u_blocksetup(FAR struct sdio_dev_s *dev, unsigned int blocklen,
unsigned int nblocks);
static int sam3u_cancel(FAR struct sdio_dev_s *dev);
static int sam3u_waitresponse(FAR struct sdio_dev_s *dev, uint32_t cmd);
static int sam3u_recvshort(FAR struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rshort);
static int sam3u_recvlong(FAR struct sdio_dev_s *dev, uint32_t cmd,
uint32_t rlong[4]);
static int sam3u_recvnotimpl(FAR struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rnotimpl);
/* EVENT handler */
static void sam3u_waitenable(FAR struct sdio_dev_s *dev,
sdio_eventset_t eventset);
static sdio_eventset_t
sam3u_eventwait(FAR struct sdio_dev_s *dev, uint32_t timeout);
static void sam3u_callbackenable(FAR struct sdio_dev_s *dev,
sdio_eventset_t eventset);
static int sam3u_registercallback(FAR struct sdio_dev_s *dev,
worker_t callback, void *arg);
/* DMA */
#ifdef CONFIG_SDIO_DMA
static bool sam3u_dmasupported(FAR struct sdio_dev_s *dev);
#endif
static int sam3u_dmarecvsetup(FAR struct sdio_dev_s *dev,
FAR uint8_t *buffer, size_t buflen);
static int sam3u_dmasendsetup(FAR struct sdio_dev_s *dev,
FAR const uint8_t *buffer, size_t buflen);
/* Initialization/uninitialization/reset ************************************/
static void sam3u_callback(void *arg);
/****************************************************************************
* Private Data
****************************************************************************/
struct sam3u_dev_s g_sdiodev =
{
.dev =
{
.reset = sam3u_reset,
.status = sam3u_status,
.widebus = sam3u_widebus,
.clock = sam3u_clock,
.attach = sam3u_attach,
.sendcmd = sam3u_sendcmd,
.blocksetup = sam3u_blocksetup,
.recvsetup = sam3u_dmarecvsetup,
.sendsetup = sam3u_dmasendsetup,
.cancel = sam3u_cancel,
.waitresponse = sam3u_waitresponse,
.recvR1 = sam3u_recvshort,
.recvR2 = sam3u_recvlong,
.recvR3 = sam3u_recvshort,
.recvR4 = sam3u_recvnotimpl,
.recvR5 = sam3u_recvnotimpl,
.recvR6 = sam3u_recvshort,
.recvR7 = sam3u_recvshort,
.waitenable = sam3u_waitenable,
.eventwait = sam3u_eventwait,
.callbackenable = sam3u_callbackenable,
.registercallback = sam3u_registercallback,
#ifdef CONFIG_SDIO_DMA
.dmasupported = sam3u_dmasupported,
.dmarecvsetup = sam3u_dmarecvsetup,
.dmasendsetup = sam3u_dmasendsetup,
#endif
},
};
/* Register logging support */
#ifdef CONFIG_HSMCI_XFRDEBUG
static struct sam3u_xfrregs_s g_xfrsamples[DEBUG_NDMASAMPLES];
#endif
#ifdef CONFIG_HSMCI_CMDDEBUG
static struct sam3u_hsmciregs_s g_cmdsamples[DEBUG_NCMDSAMPLES];
#endif
#if defined(CONFIG_HSMCI_XFRDEBUG) && defined(CONFIG_HSMCI_CMDDEBUG)
static bool g_xfrinitialized;
static bool g_cmdinitialized;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Low-level Helpers
****************************************************************************/
/****************************************************************************
* Name: sam3u_takesem
*
* Description:
* Take the wait semaphore (handling false alarm wakeups due to the receipt
* of signals).
*
* Input Parameters:
* dev - Instance of the SDIO device driver state structure.
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_takesem(struct sam3u_dev_s *priv)
{
/* Take the semaphore (perhaps waiting) */
while (sem_wait(&priv->waitsem) != 0)
{
/* The only case that an error should occr here is if the wait was
* awakened by a signal.
*/
ASSERT(errno == EINTR);
}
}
/****************************************************************************
* Name: sam3u_enablewaitints
*
* Description:
* Enable HSMCI interrupts needed to suport the wait function
*
* Input Parameters:
* priv - A reference to the HSMCI device state structure
* waitmask - The set of bits in the HSMCI MASK register to set
* waitevents - Waited for events
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_enablewaitints(struct sam3u_dev_s *priv, uint32_t waitmask,
sdio_eventset_t waitevents)
{
irqstate_t flags;
/* Save all of the data and set the new interrupt mask in one, atomic
* operation.
*/
flags = irqsave();
priv->waitevents = waitevents;
priv->wkupevent = 0;
priv->waitmask = waitmask;
putreg32(priv->xfrmask | priv->waitmask, SAM3U_HSMCI_IER);
irqrestore(flags);
}
/****************************************************************************
* Name: sam3u_disablewaitints
*
* Description:
* Disable HSMCI interrupts and save wakeup event. Called
*
* Input Parameters:
* priv - A reference to the HSMCI device state structure
* wkupevent - Wake-up event(s)
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_disablewaitints(struct sam3u_dev_s *priv,
sdio_eventset_t wkupevent)
{
irqstate_t flags;
/* Save all of the data and set the new interrupt mask in one, atomic
* operation.
*/
flags = irqsave();
priv->waitevents = 0;
priv->wkupevent = wkupevent;
priv->waitmask = 0;
putreg32(~priv->xfrmask, SAM3U_HSMCI_IDR);
irqrestore(flags);
}
/****************************************************************************
* Name: sam3u_enablexfrints
*
* Description:
* Enable HSMCI interrupts needed to support the data transfer event
*
* Input Parameters:
* priv - A reference to the HSMCI device state structure
* xfrmask - The set of bits in the HSMCI MASK register to set
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_enablexfrints(struct sam3u_dev_s *priv, uint32_t xfrmask)
{
irqstate_t flags = irqsave();
priv->xfrmask = xfrmask;
putreg32(priv->xfrmask | priv->waitmask, SAM3U_HSMCI_IER);
irqrestore(flags);
}
/****************************************************************************
* Name: sam3u_disablexfrints
*
* Description:
* Disable HSMCI interrupts needed to support the data transfer event
*
* Input Parameters:
* priv - A reference to the HSMCI device state structure
* xfrmask - The set of bits in the HSMCI MASK register to set
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_disablexfrints(struct sam3u_dev_s *priv)
{
irqstate_t flags = irqsave();
priv->xfrmask = 0;
putreg32(~priv->waitmask, SAM3U_HSMCI_IDR);
irqrestore(flags);
}
/****************************************************************************
* Name: sam3u_disable
*
* Description:
* Disable the HSMCI
*
****************************************************************************/
static inline void sam3u_disable(void)
{
/* Disable the MCI peripheral clock */
putreg32((1 << SAM3U_PID_HSMCI), SAM3U_PMC_PCDR);
/* Disable the MCI */
putreg32(HSMCI_CR_MCIDIS, SAM3U_HSMCI_CR);
/* Disable all the interrupts */
putreg32(0xffffffff, SAM3U_HSMCI_IDR);
}
/****************************************************************************
* Name: sam3u_enable
*
* Description:
* Enable the HSMCI
*
****************************************************************************/
static inline void sam3u_enable(void)
{
/* Enable the MCI peripheral clock */
putreg32((1 << SAM3U_PID_HSMCI), SAM3U_PMC_PCER);
/* Enable the MCI and the Power Saving */
putreg32(HSMCI_CR_MCIEN, SAM3U_HSMCI_CR);
}
/****************************************************************************
* Register Sampling
****************************************************************************/
/****************************************************************************
* Name: sam3u_hsmcisample
*
* Description:
* Sample HSMCI registers
*
****************************************************************************/
#if defined(CONFIG_HSMCI_XFRDEBUG) || defined(CONFIG_HSMCI_CMDDEBUG)
static void sam3u_hsmcisample(struct sam3u_hsmciregs_s *regs)
{
regs->mr = getreg32(SAM3U_HSMCI_MR);
regs->dtor = getreg32(SAM3U_HSMCI_DTOR);
regs->sdcr = getreg32(SAM3U_HSMCI_SDCR);
regs->argr = getreg32(SAM3U_HSMCI_ARGR);
regs->blkr = getreg32(SAM3U_HSMCI_BLKR);
regs->cstor = getreg32(SAM3U_HSMCI_CSTOR);
regs->rsp0 = getreg32(SAM3U_HSMCI_RSPR0);
regs->rsp1 = getreg32(SAM3U_HSMCI_RSPR1);
regs->rsp2 = getreg32(SAM3U_HSMCI_RSPR2);
regs->rsp3 = getreg32(SAM3U_HSMCI_RSPR3);
regs->sr = getreg32(SAM3U_HSMCI_SR);
regs->imr = getreg32(SAM3U_HSMCI_IMR);
regs->dma = getreg32(SAM3U_HSMCI_DMA);
regs->cfg = getreg32(SAM3U_HSMCI_CFG);
regs->wpmr = getreg32(SAM3U_HSMCI_WPMR);
regs->wpsr = getreg32(SAM3U_HSMCI_WPSR);
}
#endif
/****************************************************************************
* Name: sam3u_hsmcidump
*
* Description:
* Dump one register sample
*
****************************************************************************/
#if defined(CONFIG_HSMCI_XFRDEBUG) || defined(CONFIG_HSMCI_CMDDEBUG)
static void sam3u_hsmcidump(struct sam3u_hsmciregs_s *regs, const char *msg)
{
fdbg("HSMCI Registers: %s\n", msg);
fdbg(" MR[%08x]: %08x\n", SAM3U_HSMCI_MR, regs->mr);
fdbg(" DTOR[%08x]: %08x\n", SAM3U_HSMCI_DTOR, regs->dtor);
fdbg(" SDCR[%08x]: %08x\n", SAM3U_HSMCI_SDCR, regs->sdcr);
fdbg(" ARGR[%08x]: %08x\n", SAM3U_HSMCI_ARGR, regs->argr);
fdbg(" BLKR[%08x]: %08x\n", SAM3U_HSMCI_BLKR, regs->blkr);
fdbg(" CSTOR[%08x]: %08x\n", SAM3U_HSMCI_CSTOR, regs->cstor);
fdbg(" RSPR0[%08x]: %08x\n", SAM3U_HSMCI_RSPR0, regs->rsp0);
fdbg(" RSPR1[%08x]: %08x\n", SAM3U_HSMCI_RSPR1, regs->rsp1);
fdbg(" RSPR2[%08x]: %08x\n", SAM3U_HSMCI_RSPR2, regs->rsp2);
fdbg(" RSPR3[%08x]: %08x\n", SAM3U_HSMCI_RSPR3, regs->rsp3);
fdbg(" SR[%08x]: %08x\n", SAM3U_HSMCI_SR, regs->sr);
fdbg(" IMR[%08x]: %08x\n", SAM3U_HSMCI_IMR, regs->imr);
fdbg(" DMA[%08x]: %08x\n", SAM3U_HSMCI_DMA, regs->dma);
fdbg(" CFG[%08x]: %08x\n", SAM3U_HSMCI_CFG, regs->cfg);
fdbg(" WPMR[%08x]: %08x\n", SAM3U_HSMCI_WPMR, regs->wpmr);
fdbg(" WPSR[%08x]: %08x\n", SAM3U_HSMCI_WPSR, regs->wpsr);
}
#endif
/****************************************************************************
* Name: sam3u_xfrsample
*
* Description:
* Sample HSMCI/DMA registers
*
****************************************************************************/
#ifdef CONFIG_HSMCI_XFRDEBUG
static void sam3u_xfrsample(struct sam3u_dev_s *priv, int index)
{
struct sam3u_xfrregs_s *regs = &g_xfrsamples[index];
#ifdef CONFIG_DEBUG_DMA
sam3u_dmasample(priv->dma, ®s->dma);
#endif
sam3u_hsmcisample(®s->hsmci);
}
#endif
/****************************************************************************
* Name: sam3u_xfrsampleinit
*
* Description:
* Setup prior to collecting transfer samples
*
****************************************************************************/
#ifdef CONFIG_HSMCI_XFRDEBUG
static void sam3u_xfrsampleinit(void)
{
memset(g_xfrsamples, 0xff, DEBUG_NDMASAMPLES * sizeof(struct sam3u_xfrregs_s));
#ifdef CONFIG_HSMCI_CMDDEBUG
g_xfrinitialized = true;
#endif
}
#endif
/****************************************************************************
* Name: sam3u_xfrdumpone
*
* Description:
* Dump one transfer register sample
*
****************************************************************************/
#ifdef CONFIG_HSMCI_XFRDEBUG
static void sam3u_xfrdumpone(struct sam3u_dev_s *priv,
struct sam3u_xfrregs_s *regs, const char *msg)
{
#ifdef CONFIG_DEBUG_DMA
sam3u_dmadump(priv->dma, ®s->dma, msg);
#endif
sam3u_hsmcidump(®s->hsmci, msg);
}
#endif
/****************************************************************************
* Name: sam3u_xfrdump
*
* Description:
* Dump all transfer-related, sampled register data
*
****************************************************************************/
#ifdef CONFIG_HSMCI_XFRDEBUG
static void sam3u_xfrdump(struct sam3u_dev_s *priv)
{
#ifdef CONFIG_HSMCI_CMDDEBUG
if (g_xfrinitialized)
#endif
{
sam3u_xfrdumpone(priv, &g_xfrsamples[SAMPLENDX_BEFORE_SETUP], "Before setup");
#ifdef CONFIG_DEBUG_DMA
sam3u_xfrdumpone(priv, &g_xfrsamples[SAMPLENDX_BEFORE_ENABLE], "Before DMA enable");
#endif
sam3u_xfrdumpone(priv, &g_xfrsamples[SAMPLENDX_AFTER_SETUP], "After setup");
sam3u_xfrdumpone(priv, &g_xfrsamples[SAMPLENDX_END_TRANSFER], "End of transfer");
#ifdef CONFIG_DEBUG_DMA
sam3u_xfrdumpone(priv, &g_xfrsamples[SAMPLENDX_DMA_CALLBACK], "DMA Callback");
#endif
#ifdef CONFIG_HSMCI_CMDDEBUG
g_xfrinitialized = false;
#endif
}
}
#endif
/****************************************************************************
* Name: sam3u_cmdsampleinit
*
* Description:
* Setup prior to collecting command/response samples
*
****************************************************************************/
#ifdef CONFIG_HSMCI_CMDDEBUG
static void sam3u_cmdsampleinit(void)
{
memset(g_cmdsamples, 0xff, DEBUG_NCMDSAMPLES * sizeof(struct sam3u_hsmciregs_s));
#ifdef CONFIG_HSMCI_XFRDEBUG
g_cmdinitialized = true;
#endif
}
#endif
/****************************************************************************
* Name: sam3u_cmdsample1 & 2
*
* Description:
* Sample command/response registers
*
****************************************************************************/
#ifdef CONFIG_HSMCI_CMDDEBUG
static inline void sam3u_cmdsample1(int index)
{
sam3u_hsmcisample(&g_cmdsamples[index]);
}
static inline void sam3u_cmdsample2(int index, uint32_t sr)
{
sam3u_hsmcisample(&g_cmdsamples[index]);
g_cmdsamples[index].sr = sr;
}
#endif
/****************************************************************************
* Name: sam3u_cmddump
*
* Description:
* Dump all comand/response register data
*
****************************************************************************/
#ifdef CONFIG_HSMCI_CMDDEBUG
static void sam3u_cmddump(void)
{
#ifdef CONFIG_HSMCI_XFRDEBUG
if (g_cmdinitialized)
#endif
{
sam3u_hsmcidump(&g_cmdsamples[SAMPLENDX_AFTER_CMDR], "After command setup");
sam3u_hsmcidump(&g_cmdsamples[SAMPLENDX_AT_WAKEUP], "After wakeup");
#ifdef CONFIG_HSMCI_XFRDEBUG
g_cmdinitialized = false;
#endif
}
}
#endif
/****************************************************************************
* DMA Helpers
****************************************************************************/
/****************************************************************************
* Name: sam3u_dmacallback
*
* Description:
* Called when HSMCI DMA completes
*
****************************************************************************/
static void sam3u_dmacallback(DMA_HANDLE handle, void *arg, int result)
{
/* We don't really do anything at the completion of DMA. The termination
* of the transfer is driven by the HSMCI interrupts.
*/
sam3u_xfrsample((struct sam3u_dev_s*)arg, SAMPLENDX_DMA_CALLBACK);
}
/****************************************************************************
* Data Transfer Helpers
****************************************************************************/
/****************************************************************************
* Name: sam3u_eventtimeout
*
* Description:
* The watchdog timeout setup when the event wait start has expired without
* any other waited-for event occurring.
*
* Input Parameters:
* argc - The number of arguments (should be 1)
* arg - The argument (state structure reference cast to uint32_t)
*
* Returned Value:
* None
*
* Assumptions:
* Always called from the interrupt level with interrupts disabled.
*
****************************************************************************/
static void sam3u_eventtimeout(int argc, uint32_t arg)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)arg;
DEBUGASSERT(argc == 1 && priv != NULL);
DEBUGASSERT((priv->waitevents & SDIOWAIT_TIMEOUT) != 0);
/* Is a data transfer complete event expected? */
if ((priv->waitevents & SDIOWAIT_TIMEOUT) != 0)
{
/* Yes.. wake up any waiting threads */
sam3u_endwait(priv, SDIOWAIT_TIMEOUT);
flldbg("Timeout\n");
}
}
/****************************************************************************
* Name: sam3u_endwait
*
* Description:
* Wake up a waiting thread if the waited-for event has occurred.
*
* Input Parameters:
* priv - An instance of the HSMCI device interface
* wkupevent - The event that caused the wait to end
*
* Returned Value:
* None
*
* Assumptions:
* Always called from the interrupt level with interrupts disabled.
*
****************************************************************************/
static void sam3u_endwait(struct sam3u_dev_s *priv, sdio_eventset_t wkupevent)
{
/* Cancel the watchdog timeout */
(void)wd_cancel(priv->waitwdog);
/* Disable event-related interrupts and save wakeup event */
sam3u_disablewaitints(priv, wkupevent);
/* Wake up the waiting thread */
sam3u_givesem(priv);
}
/****************************************************************************
* Name: sam3u_endtransfer
*
* Description:
* Terminate a transfer with the provided status. This function is called
* only from the HSMCI interrupt handler when end-of-transfer conditions
* are detected.
*
* Input Parameters:
* priv - An instance of the HSMCI device interface
* wkupevent - The event that caused the transfer to end
*
* Returned Value:
* None
*
* Assumptions:
* Always called from the interrupt level with interrupts disabled.
*
****************************************************************************/
static void sam3u_endtransfer(struct sam3u_dev_s *priv, sdio_eventset_t wkupevent)
{
/* Disable all transfer related interrupts */
sam3u_disablexfrints(priv);
/* No data transfer */
sam3u_notransfer(priv);
/* DMA debug instrumentation */
sam3u_xfrsample(priv, SAMPLENDX_END_TRANSFER);
/* Make sure that the DMA is stopped (it will be stopped automatically
* on normal transfers, but not necessarily when the transfer terminates
* on an error condition.
*/
sam3u_dmastop(priv->dma);
/* Disable the DMA handshaking */
putreg32(0, SAM3U_HSMCI_DMA);
/* Is a thread wait for these data transfer complete events? */
if ((priv->waitevents & wkupevent) != 0)
{
/* Yes.. wake up any waiting threads */
sam3u_endwait(priv, wkupevent);
}
}
/****************************************************************************
* Name: sam3u_notransfer
*
* Description:
* Setup for no transfer. This is the default setup that is overriddden
* by sam3u_dmarecvsetup or sam3u_dmasendsetup
*
* Input Parameters:
* priv - An instance of the HSMCI device interface
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_notransfer(struct sam3u_dev_s *priv)
{
uint32_t regval = getreg32(SAM3U_HSMCI_MR);
regval &= ~(HSMCI_MR_RDPROOF | HSMCI_MR_WRPROOF | HSMCI_MR_BLKLEN_MASK);
putreg32(regval, SAM3U_HSMCI_MR);
}
/****************************************************************************
* Interrrupt Handling
****************************************************************************/
/****************************************************************************
* Name: sam3u_interrupt
*
* Description:
* HSMCI interrupt handler
*
* Input Parameters:
* irq - IRQ number of the interrupts
* context - Saved machine context at the time of the interrupt
*
* Returned Value:
* None
*
****************************************************************************/
static int sam3u_interrupt(int irq, void *context)
{
struct sam3u_dev_s *priv = &g_sdiodev;
uint32_t sr;
uint32_t enabled;
uint32_t pending;
/* Loop while there are pending interrupts. */
for (;;)
{
/* Check the HSMCI status register. Mask out all bits that don't
* correspond to enabled interrupts. (This depends on the fact that
* bits are ordered the same in both the SR and IMR registers). If
* there are non-zero bits remaining, then we have work to do here.
*/
sr = getreg32(SAM3U_HSMCI_SR);
enabled = sr & getreg32(SAM3U_HSMCI_IMR);
if (enabled == 0)
{
break;
}
/* Handle in progress, interrupt driven data transfers ****************/
/* Do any of these interrupts signal the end a data transfer? */
pending = enabled & priv->xfrmask;
if (pending != 0)
{
/* Yes.. the transfer is complete. Did it complete with an error? */
if ((pending & HSMCI_DATA_ERRORS) != 0)
{
/* Yes.. Was it some kind of timeout error? */
flldbg("ERROR: enabled: %08x pending: %08x\n", enabled, pending);
if ((pending & HSMCI_DATA_TIMEOUT_ERRORS) != 0)
{
/* Yes.. Terminate with a timeout. */
sam3u_endtransfer(priv, SDIOWAIT_TRANSFERDONE|SDIOWAIT_TIMEOUT);
}
else
{
/* No.. Terminate with an I/O error. */
sam3u_endtransfer(priv, SDIOWAIT_TRANSFERDONE|SDIOWAIT_ERROR);
}
}
else
{
/* No.. Then the transfer must have completed successfully */
sam3u_endtransfer(priv, SDIOWAIT_TRANSFERDONE);
}
}
/* Handle wait events *************************************************/
/* Do any of these interrupts signal wakeup event? */
pending = enabled & priv->waitmask;
if (pending != 0)
{
sdio_eventset_t wkupevent = 0;
/* Is this a Command-Response sequence completion event? */
if ((pending & priv->cmdrmask) != 0)
{
sam3u_cmdsample2(SAMPLENDX_AT_WAKEUP, sr);
/* Yes.. Did the Command-Response sequence end with an error? */
if ((pending & HSMCI_RESPONSE_ERRORS) != 0)
{
/* Yes.. Was the error some kind of timeout? */
fllvdbg("ERROR:events: %08x SR: %08x\n",
priv->cmdrmask, enabled);
if ((pending & HSMCI_RESPONSE_TIMEOUT_ERRORS) != 0)
{
/* Yes.. signal a timeout error */
wkupevent = SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE|SDIOWAIT_TIMEOUT;
}
else
{
/* No.. signal some generic I/O error */
wkupevent = SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE|SDIOWAIT_ERROR;
}
}
else
{
/* The Command-Response sequence ended with no error */
wkupevent = SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE;
}
/* Yes.. Is there a thread waiting for this event set? */
wkupevent &= priv->waitevents;
if (wkupevent != 0)
{
/* Yes.. wake the thread up */
sam3u_endwait(priv, wkupevent);
}
}
}
}
return OK;
}
/****************************************************************************
* SDIO Interface Methods
****************************************************************************/
/****************************************************************************
* Name: sam3u_reset
*
* Description:
* Reset the HSMCI controller. Undo all setup and initialization.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_reset(FAR struct sdio_dev_s *dev)
{
FAR struct sam3u_dev_s *priv = (FAR struct sam3u_dev_s *)dev;
irqstate_t flags;
/* Enable the MCI clock */
flags = irqsave();
putreg32((1 << SAM3U_PID_HSMCI), SAM3U_PMC_PCER);
fdbg("PCSR: %08x\n", getreg32(SAM3U_PMC_PCSR));
/* Reset the MCI */
putreg32(HSMCI_CR_SWRST, SAM3U_HSMCI_CR);
/* Disable the MCI */
putreg32(HSMCI_CR_MCIDIS | HSMCI_CR_PWSDIS, SAM3U_HSMCI_CR);
/* Disable all the interrupts */
putreg32(0xffffffff, SAM3U_HSMCI_IDR);
/* Set the Data Timeout Register */
putreg32(HSMCI_DTOR_DTOCYC_MAX | HSMCI_DTOR_DTOMUL_MAX, SAM3U_HSMCI_DTOR);
/* Set the Mode Register for ID mode frequency (probably 400KHz) */
sam3u_clock(dev, CLOCK_IDMODE);
/* Set the SDCard Register */
putreg32(HSMCI_SDCR_SDCSEL_SLOTA | HSMCI_SDCR_SDCBUS_4BIT, SAM3U_HSMCI_SDCR);
/* Enable the MCI controller */
putreg32(HSMCI_CR_MCIEN, SAM3U_HSMCI_CR);
/* Disable the DMA interface */
putreg32(0, SAM3U_HSMCI_DMA);
/* Configure MCI */
putreg32(HSMCI_CFG_FIFOMODE, SAM3U_HSMCI_CFG);
/* No data transfer */
sam3u_notransfer(priv);
/* Reset data */
priv->waitevents = 0; /* Set of events to be waited for */
priv->waitmask = 0; /* Interrupt enables for event waiting */
priv->wkupevent = 0; /* The event that caused the wakeup */
wd_cancel(priv->waitwdog); /* Cancel any timeouts */
/* Interrupt mode data transfer support */
priv->xfrmask = 0; /* Interrupt enables for data transfer */
/* DMA data transfer support */
priv->widebus = false; /* Required for DMA support */
irqrestore(flags);
}
/****************************************************************************
* Name: sam3u_status
*
* Description:
* Get SDIO status.
*
* Input Parameters:
* dev - Device-specific state data
*
* Returned Value:
* Returns a bitset of status values (see sam3u_status_* defines)
*
****************************************************************************/
static uint8_t sam3u_status(FAR struct sdio_dev_s *dev)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)dev;
return priv->cdstatus;
}
/****************************************************************************
* Name: sam3u_widebus
*
* Description:
* Called after change in Bus width has been selected (via ACMD6). Most
* controllers will need to perform some special operations to work
* correctly in the new bus mode.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* wide - true: wide bus (4-bit) bus mode enabled
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_widebus(FAR struct sdio_dev_s *dev, bool wide)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)dev;
uint32_t regval;
/* Set 1-bit or 4-bit bus by configuring the SDCBUS field of the SDCR register */
regval = getreg32(SAM3U_HSMCI_SDCR);
regval &= ~HSMCI_SDCR_SDCBUS_MASK;
regval |= wide ? HSMCI_SDCR_SDCBUS_4BIT : HSMCI_SDCR_SDCBUS_1BIT;
putreg32(regval, SAM3U_HSMCI_SDCR);
/* Remember the setting */
priv->widebus = wide;
}
/****************************************************************************
* Name: sam3u_clock
*
* Description:
* Enable/disable SDIO clocking
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* rate - Specifies the clocking to use (see enum sdio_clock_e)
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_clock(FAR struct sdio_dev_s *dev, enum sdio_clock_e rate)
{
uint32_t regval;
bool enable = true;
/* Fetch the current mode register and mask out the clkdiv (and pwsdiv) */
regval = getreg32(SAM3U_HSMCI_MR);
regval &= ~(HSMCI_MR_CLKDIV_MASK | HSMCI_MR_PWSDIV_MASK);
/* These clock devisor values that must be defined in the board-specific
* board.h header file: HSMCI_INIT_CLKDIV, HSMCI_MMCXFR_CLKDIV,
* HSMCI_SDXFR_CLKDIV, and HSMCI_SDWIDEXFR_CLKDIV.
*/
switch (rate)
{
default:
case CLOCK_SDIO_DISABLED: /* Clock is disabled */
regval |= HSMCI_INIT_CLKDIV | HSMCI_MR_PWSDIV_MAX;
enable = false;
return;
case CLOCK_IDMODE: /* Initial ID mode clocking (<400KHz) */
regval |= HSMCI_INIT_CLKDIV | HSMCI_MR_PWSDIV_MAX;
break;
case CLOCK_MMC_TRANSFER: /* MMC normal operation clocking */
regval |= HSMCI_MMCXFR_CLKDIV | HSMCI_MR_PWSDIV_MAX;
break;
case CLOCK_SD_TRANSFER_1BIT: /* SD normal operation clocking (narrow 1-bit mode) */
regval |= HSMCI_SDXFR_CLKDIV | HSMCI_MR_PWSDIV_MAX;
break;
case CLOCK_SD_TRANSFER_4BIT: /* SD normal operation clocking (wide 4-bit mode) */
regval |= HSMCI_SDWIDEXFR_CLKDIV | HSMCI_MR_PWSDIV_MAX;
break;
};
/* Set the new clock diver and make sure that the clock is enabled or
* disabled, whichever the case.
*/
putreg32(regval, SAM3U_HSMCI_MR);
if (enable)
{
sam3u_enable();
}
else
{
sam3u_disable();
}
}
/****************************************************************************
* Name: sam3u_attach
*
* Description:
* Attach and prepare interrupts
*
* Input Parameters:
* dev - An instance of the SDIO device interface
*
* Returned Value:
* OK on success; A negated errno on failure.
*
****************************************************************************/
static int sam3u_attach(FAR struct sdio_dev_s *dev)
{
int ret;
/* Attach the HSMCI interrupt handler */
ret = irq_attach(SAM3U_IRQ_HSMCI, sam3u_interrupt);
if (ret == OK)
{
/* Disable all interrupts at the HSMCI controller and clear (most) static
* interrupt flags by reading the status register.
*/
putreg32(0xffffffff, SAM3U_HSMCI_IDR);
(void)getreg32(SAM3U_HSMCI_SR);
/* Enable HSMCI interrupts at the NVIC. They can now be enabled at
* the HSMCI controller as needed.
*/
up_enable_irq(SAM3U_IRQ_HSMCI);
/* Set the interrrupt priority */
up_prioritize_irq(SAM3U_IRQ_HSMCI, CONFIG_HSMCI_PRI);
}
return ret;
}
/****************************************************************************
* Name: sam3u_sendcmd
*
* Description:
* Send the SDIO command
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* cmd - The command to send (32-bits, encoded)
* arg - 32-bit argument required with some commands
*
* Returned Value:
* None
*
****************************************************************************/
static int sam3u_sendcmd(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t arg)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
uint32_t regval;
uint32_t cmdidx;
sam3u_cmdsampleinit();
/* Set the HSMCI Argument value */
putreg32(arg, SAM3U_HSMCI_ARGR);
/* Construct the command valid, starting with the command index */
cmdidx = (cmd & MMCSD_CMDIDX_MASK) >> MMCSD_CMDIDX_SHIFT;
regval = cmdidx << HSMCI_CMDR_CMDNB_SHIFT;
/* 'OR' in response related bits */
switch (cmd & MMCSD_RESPONSE_MASK)
{
/* No response */
case MMCSD_NO_RESPONSE:
priv->cmdrmask = HSMCI_CMDRESP_INTS;
regval |= HSMCI_CMDR_RSPTYP_NONE;
break;
/* 48-bit response with CRC */
case MMCSD_R1_RESPONSE:
case MMCSD_R4_RESPONSE:
case MMCSD_R5_RESPONSE:
case MMCSD_R6_RESPONSE:
priv->cmdrmask = HSMCI_CMDRESP_INTS;
regval |= (HSMCI_CMDR_RSPTYP_48BIT | HSMCI_CMDR_MAXLAT);
break;
case MMCSD_R1B_RESPONSE:
priv->cmdrmask = HSMCI_CMDRESP_INTS;
regval |= (HSMCI_CMDR_RSPTYP_R1B | HSMCI_CMDR_MAXLAT);
break;
/* 48-bit response without CRC */
case MMCSD_R3_RESPONSE:
case MMCSD_R7_RESPONSE:
priv->cmdrmask = HSMCI_CMDRESP_NOCRC_INTS;
regval |= (HSMCI_CMDR_RSPTYP_48BIT | HSMCI_CMDR_MAXLAT);
break;
/* 136-bit response with CRC */
case MMCSD_R2_RESPONSE:
priv->cmdrmask = HSMCI_CMDRESP_INTS;
regval |= (HSMCI_CMDR_RSPTYP_136BIT | HSMCI_CMDR_MAXLAT);
break;
}
/* 'OR' in data transer related bits */
switch (cmd & MMCSD_DATAXFR_MASK)
{
#if 0 /* No MMC support */
case MMCSD_RDSTREAM: /* MMC Read stream */
regval |= (HSMCI_CMDR_TRCMD_START | HSMCI_CMDR_TRTYP_STREAM | HSMCI_CMDR_TRDIR_READ);
break;
case MMCSD_WRSTREAM: /* MMC Write stream */
regval |= (HSMCI_CMDR_TRCMD_START | HSMCI_CMDR_TRTYP_STREAM | HSMCI_CMDR_TRDIR_WRITE);
break;
#endif
case MMCSD_RDDATAXFR: /* Read block transfer */
regval |= (HSMCI_CMDR_TRCMD_START | HSMCI_CMDR_TRDIR_READ);
regval |= (cmd & MMCSD_MULTIBLOCK) ? HSMCI_CMDR_TRTYP_MULTI : HSMCI_CMDR_TRTYP_SINGLE;
break;
case MMCSD_WRDATAXFR: /* Write block transfer */
regval |= (HSMCI_CMDR_TRCMD_START | HSMCI_CMDR_TRDIR_WRITE);
regval |= (cmd & MMCSD_MULTIBLOCK) ? HSMCI_CMDR_TRTYP_MULTI : HSMCI_CMDR_TRTYP_SINGLE;
break;
case MMCSD_NODATAXFR:
default:
if ((cmd & MMCSD_STOPXFR) != 0)
{
regval |= HSMCI_CMDR_TRCMD_STOP;
}
break;
}
/* 'OR' in Open Drain option */
#if 0 /* No MMC support */
if ((cmd & MMCSD_OPENDRAIN) != 0)
{
regval |= HSMCI_CMDR_OPDCMD;
}
#endif
/* Write the fully decorated command to CMDR */
fvdbg("cmd: %08x arg: %08x regval: %08x\n", cmd, arg, regval);
putreg32(regval, SAM3U_HSMCI_CMDR);
sam3u_cmdsample1(SAMPLENDX_AFTER_CMDR);
return OK;
}
/****************************************************************************
* Name: sam3u_blocksetup
*
* Description:
* Some hardward needs to be informed of the selected blocksize.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* blocklen - The selected block size.
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_blocksetup(FAR struct sdio_dev_s *dev, unsigned int blocklen,
unsigned int nblocks)
{
uint32_t regval;
DEBUGASSERT(dev != NULL && nblocks > 0 && nblocks < 65535 && blocklen < 65535);
/* Set the block size */
regval = getreg32(SAM3U_HSMCI_MR);
regval &= ~(HSMCI_MR_RDPROOF | HSMCI_MR_WRPROOF | HSMCI_MR_BLKLEN_MASK);
regval |= HSMCU_PROOF_BITS;
regval |= (blocklen << HSMCI_MR_BLKLEN_SHIFT);
putreg32(regval, SAM3U_HSMCI_MR);
/* Set the block count */
regval = getreg32(SAM3U_HSMCI_BLKR);
regval &= ~HSMCI_BLKR_BCNT_MASK;
regval |= (nblocks << HSMCI_BLKR_BCNT_SHIFT);
putreg32(regval, SAM3U_HSMCI_BLKR);
}
/****************************************************************************
* Name: sam3u_cancel
*
* Description:
* Cancel the data transfer setup of HSMCI_RECVSETUP, HSMCI_SENDSETUP,
* HSMCI_DMARECVSETUP or HSMCI_DMASENDSETUP. This must be called to cancel
* the data transfer setup if, for some reason, you cannot perform the
* transfer.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
*
* Returned Value:
* OK is success; a negated errno on failure
*
****************************************************************************/
static int sam3u_cancel(FAR struct sdio_dev_s *dev)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
/* Disable all transfer- and event- related interrupts */
sam3u_disablexfrints(priv);
sam3u_disablewaitints(priv, 0);
/* No data transfer */
sam3u_notransfer(priv);
/* Clearing (most) pending interrupt status by reading the status register */
(void)getreg32(SAM3U_HSMCI_SR);
/* Cancel any watchdog timeout */
(void)wd_cancel(priv->waitwdog);
/* Make sure that the DMA is stopped (it will be stopped automatically
* on normal transfers, but not necessarily when the transfer terminates
* on an error condition.
*/
sam3u_dmastop(priv->dma);
/* Disable the DMA handshaking */
putreg32(0, SAM3U_HSMCI_DMA);
return OK;
}
/****************************************************************************
* Name: sam3u_waitresponse
*
* Description:
* Poll-wait for the response to the last command to be ready.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* cmd - The command that was sent. See 32-bit command definitions above.
*
* Returned Value:
* OK is success; a negated errno on failure
*
****************************************************************************/
static int sam3u_waitresponse(FAR struct sdio_dev_s *dev, uint32_t cmd)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
uint32_t sr;
int32_t timeout;
switch (cmd & MMCSD_RESPONSE_MASK)
{
case MMCSD_R1_RESPONSE:
case MMCSD_R1B_RESPONSE:
case MMCSD_R2_RESPONSE:
case MMCSD_R6_RESPONSE:
timeout = HSMCI_LONGTIMEOUT;
break;
case MMCSD_R4_RESPONSE:
case MMCSD_R5_RESPONSE:
return -ENOSYS;
case MMCSD_NO_RESPONSE:
case MMCSD_R3_RESPONSE:
case MMCSD_R7_RESPONSE:
timeout = HSMCI_CMDTIMEOUT;
break;
default:
return -EINVAL;
}
/* Then wait for the response (or timeout) */
for (;;)
{
/* Did a Command-Response sequence termination evernt occur? */
sr = getreg32(SAM3U_HSMCI_SR);
if ((sr & priv->cmdrmask) != 0)
{
sam3u_cmdsample2(SAMPLENDX_AT_WAKEUP, sr);
sam3u_cmddump();
/* Yes.. Did the Command-Response sequence end with an error? */
if ((sr & HSMCI_RESPONSE_ERRORS) != 0)
{
/* Yes.. Was the error some kind of timeout? */
fdbg("ERROR: cmd: %08x events: %08x SR: %08x\n",
cmd, priv->cmdrmask, sr);
if ((sr & HSMCI_RESPONSE_TIMEOUT_ERRORS) != 0)
{
/* Yes.. return a timeout error */
priv->wkupevent = SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE|SDIOWAIT_TIMEOUT;
return -ETIMEDOUT;
}
else
{
/* No.. return some generic I/O error */
priv->wkupevent = SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE|SDIOWAIT_ERROR;
return -EIO;
}
}
else
{
/* The Command-Response sequence ended with no error */
priv->wkupevent = SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE;
return OK;
}
}
else if (--timeout <= 0)
{
fdbg("ERROR: Timeout cmd: %08x events: %08x SR: %08x\n",
cmd, priv->cmdrmask, sr);
priv->wkupevent = SDIOWAIT_TIMEOUT;
return -ETIMEDOUT;
}
}
}
/****************************************************************************
* Name: sam3u_recvRx
*
* Description:
* Receive response to SDIO command. Only the critical payload is
* returned -- that is 32 bits for 48 bit status and 128 bits for 136 bit
* status. The driver implementation should verify the correctness of
* the remaining, non-returned bits (CRCs, CMD index, etc.).
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* Rx - Buffer in which to receive the response
*
* Returned Value:
* Number of bytes sent on success; a negated errno on failure. Here a
* failure means only a failure to obtain the requested reponse (due to
* transport problem -- timeout, CRC, etc.). The implementation only
* assures that the response is returned intact and does not check errors
* within the response itself.
*
****************************************************************************/
static int sam3u_recvshort(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rshort)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
int ret = OK;
/* These responses could have CRC errors:
*
* R1 Command response (48-bit)
* 47 0 Start bit
* 46 0 Transmission bit (0=from card)
* 45:40 bit5 - bit0 Command index (0-63)
* 39:8 bit31 - bit0 32-bit card status
* 7:1 bit6 - bit0 CRC7
* 0 1 End bit
*
* R1b Identical to R1 with the additional busy signaling via the data
* line.
*
* R6 Published RCA Response (48-bit, SD card only)
* 47 0 Start bit
* 46 0 Transmission bit (0=from card)
* 45:40 bit5 - bit0 Command index (0-63)
* 39:8 bit31 - bit0 32-bit Argument Field, consisting of:
* [31:16] New published RCA of card
* [15:0] Card status bits {23,22,19,12:0}
* 7:1 bit6 - bit0 CRC7
* 0 1 End bit
*
* But there is no parity on the R3 response and parity errors should
* be ignored.
*
* R3 OCR (48-bit)
* 47 0 Start bit
* 46 0 Transmission bit (0=from card)
* 45:40 bit5 - bit0 Reserved
* 39:8 bit31 - bit0 32-bit OCR register
* 7:1 bit6 - bit0 Reserved
* 0 1 End bit
*/
#ifdef CONFIG_DEBUG
if (!rshort)
{
fdbg("ERROR: rshort=NULL\n");
ret = -EINVAL;
}
/* Check that this is the correct response to this command */
else if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R1_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R1B_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R6_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R3_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R7_RESPONSE)
{
fdbg("ERROR: Wrong response CMD=%08x\n", cmd);
ret = -EINVAL;
}
else
#endif
/* Check for timeout errors */
if ((priv->wkupevent & SDIOWAIT_TIMEOUT) != 0)
{
ret = -EINVAL;
}
/* Check for other errors */
else if ((priv->wkupevent & SDIOWAIT_ERROR) != 0)
{
ret = -EIO;
}
/* Return the R1/R6 response */
else if (rshort)
{
*rshort = getreg32(SAM3U_HSMCI_RSPR0);
}
priv->wkupevent = 0;
return ret;
}
static int sam3u_recvlong(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t rlong[4])
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
int ret = OK;
/* R2 CID, CSD register (136-bit)
* 135 0 Start bit
* 134 0 Transmission bit (0=from card)
* 133:128 bit5 - bit0 Reserved
* 127:1 bit127 - bit1 127-bit CID or CSD register
* (including internal CRC)
* 0 1 End bit
*/
#ifdef CONFIG_DEBUG
/* Check that R1 is the correct response to this command */
if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R2_RESPONSE)
{
fdbg("ERROR: Wrong response CMD=%08x\n", cmd);
ret = -EINVAL;
}
else
#endif
/* Check for timeout errors */
if ((priv->wkupevent & SDIOWAIT_TIMEOUT) != 0)
{
ret = -EINVAL;
}
/* Check for other errors */
else if ((priv->wkupevent & SDIOWAIT_ERROR) != 0)
{
ret = -EIO;
}
/* Return the long response */
else if (rlong)
{
rlong[0] = getreg32(SAM3U_HSMCI_RSPR0);
rlong[1] = getreg32(SAM3U_HSMCI_RSPR1);
rlong[2] = getreg32(SAM3U_HSMCI_RSPR2);
rlong[3] = getreg32(SAM3U_HSMCI_RSPR3);
}
priv->wkupevent = 0;
return ret;
}
/* MMC responses not supported */
static int sam3u_recvnotimpl(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rnotimpl)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
priv->wkupevent = 0;
return -ENOSYS;
}
/****************************************************************************
* Name: sam3u_waitenable
*
* Description:
* Enable/disable of a set of SDIO wait events. This is part of the
* the HSMCI_WAITEVENT sequence. The set of to-be-waited-for events is
* configured before calling sam3u_eventwait. This is done in this way
* to help the driver to eliminate race conditions between the command
* setup and the subsequent events.
*
* The enabled events persist until either (1) HSMCI_WAITENABLE is called
* again specifying a different set of wait events, or (2) HSMCI_EVENTWAIT
* returns.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* eventset - A bitset of events to enable or disable (see SDIOWAIT_*
* definitions). 0=disable; 1=enable.
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_waitenable(FAR struct sdio_dev_s *dev,
sdio_eventset_t eventset)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
uint32_t waitmask;
DEBUGASSERT(priv != NULL);
/* Disable event-related interrupts */
sam3u_disablewaitints(priv, 0);
/* Select the interrupt mask that will give us the appropriate wakeup
* interrupts.
*/
waitmask = 0;
if ((eventset & (SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE)) != 0)
{
waitmask |= priv->cmdrmask;
}
/* Enable event-related interrupts */
(void)getreg32(SAM3U_HSMCI_SR);
sam3u_enablewaitints(priv, waitmask, eventset);
}
/****************************************************************************
* Name: sam3u_eventwait
*
* Description:
* Wait for one of the enabled events to occur (or a timeout). Note that
* all events enabled by HSMCI_WAITEVENTS are disabled when sam3u_eventwait
* returns. HSMCI_WAITEVENTS must be called again before sam3u_eventwait
* can be used again.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* timeout - Maximum time in milliseconds to wait. Zero means immediate
* timeout with no wait. The timeout value is ignored if
* SDIOWAIT_TIMEOUT is not included in the waited-for eventset.
*
* Returned Value:
* Event set containing the event(s) that ended the wait. Should always
* be non-zero. All events are disabled after the wait concludes.
*
****************************************************************************/
static sdio_eventset_t sam3u_eventwait(FAR struct sdio_dev_s *dev,
uint32_t timeout)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
sdio_eventset_t wkupevent = 0;
int ret;
/* There is a race condition here... the event may have completed before
* we get here. In this case waitevents will be zero, but wkupevents will
* be non-zero (and, hopefully, the semaphore count will also be non-zero.
*/
DEBUGASSERT((priv->waitevents != 0 && priv->wkupevent == 0) ||
(priv->waitevents == 0 && priv->wkupevent != 0));
/* Check if the timeout event is specified in the event set */
if ((priv->waitevents & SDIOWAIT_TIMEOUT) != 0)
{
int delay;
/* Yes.. Handle a cornercase */
if (!timeout)
{
return SDIOWAIT_TIMEOUT;
}
/* Start the watchdog timer */
delay = (timeout + (MSEC_PER_TICK-1)) / MSEC_PER_TICK;
ret = wd_start(priv->waitwdog, delay, (wdentry_t)sam3u_eventtimeout,
1, (uint32_t)priv);
if (ret != OK)
{
fdbg("ERROR: wd_start failed: %d\n", ret);
}
}
/* Loop until the event (or the timeout occurs). Race conditions are avoided
* by calling sam3u_waitenable prior to triggering the logic that will cause
* the wait to terminate. Under certain race conditions, the waited-for
* may have already occurred before this function was called!
*/
for (;;)
{
/* Wait for an event in event set to occur. If this the event has already
* occurred, then the semaphore will already have been incremented and
* there will be no wait.
*/
sam3u_takesem(priv);
wkupevent = priv->wkupevent;
/* Check if the event has occurred. When the event has occurred, then
* evenset will be set to 0 and wkupevent will be set to a nonzero value.
* When wkupevent becomes non-zero, further interrupts will have already
* been disabled.
*/
if (wkupevent != 0)
{
/* Yes... break out of the loop with wkupevent non-zero */
break;
}
}
sam3u_cmddump();
sam3u_xfrdump(priv);
return wkupevent;
}
/****************************************************************************
* Name: sam3u_callbackenable
*
* Description:
* Enable/disable of a set of SDIO callback events. This is part of the
* the SDIO callback sequence. The set of events is configured to enabled
* callbacks to the function provided in sam3u_registercallback.
*
* Events are automatically disabled once the callback is performed and no
* further callback events will occur until they are again enabled by
* calling this methos.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* eventset - A bitset of events to enable or disable (see SDIOMEDIA_*
* definitions). 0=disable; 1=enable.
*
* Returned Value:
* None
*
****************************************************************************/
static void sam3u_callbackenable(FAR struct sdio_dev_s *dev,
sdio_eventset_t eventset)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
fvdbg("eventset: %02x\n", eventset);
DEBUGASSERT(priv != NULL);
priv->cbevents = eventset;
sam3u_callback(priv);
}
/****************************************************************************
* Name: sam3u_registercallback
*
* Description:
* Register a callback that that will be invoked on any media status
* change. Callbacks should not be made from interrupt handlers, rather
* interrupt level events should be handled by calling back on the work
* thread.
*
* When this method is called, all callbacks should be disabled until they
* are enabled via a call to HSMCI_CALLBACKENABLE
*
* Input Parameters:
* dev - Device-specific state data
* callback - The funtion to call on the media change
* arg - A caller provided value to return with the callback
*
* Returned Value:
* 0 on success; negated errno on failure.
*
****************************************************************************/
static int sam3u_registercallback(FAR struct sdio_dev_s *dev,
worker_t callback, void *arg)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)dev;
/* Disable callbacks and register this callback and is argument */
fvdbg("Register %p(%p)\n", callback, arg);
DEBUGASSERT(priv != NULL);
priv->cbevents = 0;
priv->cbarg = arg;
priv->callback = callback;
return OK;
}
/****************************************************************************
* Name: sam3u_dmasupported
*
* Description:
* Return true if the hardware can support DMA
*
* Input Parameters:
* dev - An instance of the SDIO device interface
*
* Returned Value:
* true if DMA is supported.
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static bool sam3u_dmasupported(FAR struct sdio_dev_s *dev)
{
return true;
}
#endif
/****************************************************************************
* Name: sam3u_dmarecvsetup
*
* Description:
* Setup to perform a read DMA. If the processor supports a data cache,
* then this method will also make sure that the contents of the DMA memory
* and the data cache are coherent. For read transfers this may mean
* invalidating the data cache.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* buffer - The memory to DMA from
* buflen - The size of the DMA transfer in bytes
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
static int sam3u_dmarecvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer,
size_t buflen)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)dev;
DEBUGASSERT(priv != NULL && buffer != NULL && buflen > 0);
DEBUGASSERT(((uint32_t)buffer & 3) == 0);
/* Setup register sampling */
sam3u_xfrsampleinit();
sam3u_xfrsample(priv, SAMPLENDX_BEFORE_SETUP);
/* Configure the RX DMA */
sam3u_enablexfrints(priv, HSMCI_DMARECV_INTS);
sam3u_dmarxsetup(priv->dma, SAM3U_HSMCI_FIFO, (uint32_t)buffer, buflen);
/* Enable DMA handshaking */
putreg32(HSMCI_DMA_DMAEN, SAM3U_HSMCI_DMA);
sam3u_xfrsample(priv, SAMPLENDX_BEFORE_ENABLE);
/* Start the DMA */
sam3u_dmastart(priv->dma, sam3u_dmacallback, priv);
sam3u_xfrsample(priv, SAMPLENDX_AFTER_SETUP);
return OK;
}
/****************************************************************************
* Name: sam3u_dmasendsetup
*
* Description:
* Setup to perform a write DMA. If the processor supports a data cache,
* then this method will also make sure that the contents of the DMA memory
* and the data cache are coherent. For write transfers, this may mean
* flushing the data cache.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* buffer - The memory to DMA into
* buflen - The size of the DMA transfer in bytes
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
static int sam3u_dmasendsetup(FAR struct sdio_dev_s *dev,
FAR const uint8_t *buffer, size_t buflen)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)dev;
DEBUGASSERT(priv != NULL && buffer != NULL && buflen > 0);
DEBUGASSERT(((uint32_t)buffer & 3) == 0);
/* Setup register sampling */
sam3u_xfrsampleinit();
sam3u_xfrsample(priv, SAMPLENDX_BEFORE_SETUP);
/* Configure the TX DMA */
sam3u_dmatxsetup(priv->dma, SAM3U_HSMCI_FIFO, (uint32_t)buffer, buflen);
/* Enable DMA handshaking */
putreg32(HSMCI_DMA_DMAEN, SAM3U_HSMCI_DMA);
sam3u_xfrsample(priv, SAMPLENDX_BEFORE_ENABLE);
/* Start the DMA */
sam3u_dmastart(priv->dma, sam3u_dmacallback, priv);
sam3u_xfrsample(priv, SAMPLENDX_AFTER_SETUP);
/* Enable TX interrrupts */
sam3u_enablexfrints(priv, HSMCI_DMASEND_INTS);
return OK;
}
/****************************************************************************
* Initialization/uninitialization/reset
****************************************************************************/
/****************************************************************************
* Name: sam3u_callback
*
* Description:
* Perform callback.
*
* Assumptions:
* This function does not execute in the context of an interrupt handler.
* It may be invoked on any user thread or scheduled on the work thread
* from an interrupt handler.
*
****************************************************************************/
static void sam3u_callback(void *arg)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s*)arg;
/* Is a callback registered? */
DEBUGASSERT(priv != NULL);
fvdbg("Callback %p(%p) cbevents: %02x cdstatus: %02x\n",
priv->callback, priv->cbarg, priv->cbevents, priv->cdstatus);
if (priv->callback)
{
/* Yes.. Check for enabled callback events */
if ((priv->cdstatus & SDIO_STATUS_PRESENT) != 0)
{
/* Media is present. Is the media inserted event enabled? */
if ((priv->cbevents & SDIOMEDIA_INSERTED) == 0)
{
/* No... return without performing the callback */
return;
}
}
else
{
/* Media is not present. Is the media eject event enabled? */
if ((priv->cbevents & SDIOMEDIA_EJECTED) == 0)
{
/* No... return without performing the callback */
return;
}
}
/* Perform the callback, disabling further callbacks. Of course, the
* the callback can (and probably should) re-enable callbacks.
*/
priv->cbevents = 0;
/* Callbacks cannot be performed in the context of an interrupt handler.
* If we are in an interrupt handler, then queue the callback to be
* performed later on the work thread.
*/
if (up_interrupt_context())
{
/* Yes.. queue it */
fvdbg("Queuing callback to %p(%p)\n", priv->callback, priv->cbarg);
(void)work_queue(HPWORK, &priv->cbwork, (worker_t)priv->callback, priv->cbarg, 0);
}
else
{
/* No.. then just call the callback here */
fvdbg("Callback to %p(%p)\n", priv->callback, priv->cbarg);
priv->callback(priv->cbarg);
}
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sdio_initialize
*
* Description:
* Initialize SD for operation.
*
* Input Parameters:
* slotno - Not used.
*
* Returned Values:
* A reference to an SDIO interface structure. NULL is returned on failures.
*
****************************************************************************/
FAR struct sdio_dev_s *sdio_initialize(int slotno)
{
/* There is only one slot */
struct sam3u_dev_s *priv = &g_sdiodev;
fdbg("slotno: %d\n", slotno);
/* Initialize the HSMCI slot structure */
sem_init(&priv->waitsem, 0, 0);
priv->waitwdog = wd_create();
DEBUGASSERT(priv->waitwdog);
/* Allocate a DMA channel. A FIFO size of 8 is sufficient. */
priv->dma = sam3u_dmachannel(DMA_FLAGS);
DEBUGASSERT(priv->dma);
/* Configure GPIOs for 4-bit, wide-bus operation. NOTE: (1) the chip is capable of
* 8-bit wide bus operation but D4-D7 are not configured, (2) any card detection
* GPIOs must be set up in board-specific logic.
*/
sam3u_configgpio(GPIO_MCI_DAT0); /* Data 0 of Slot A */
sam3u_configgpio(GPIO_MCI_DAT1); /* Data 1 of Slot A */
sam3u_configgpio(GPIO_MCI_DAT2); /* Data 2 of Slot A */
sam3u_configgpio(GPIO_MCI_DAT3); /* Data 3 of Slot A */
sam3u_configgpio(GPIO_MCI_CK); /* SD clock */
sam3u_configgpio(GPIO_MCI_DA); /* Command/Response */
#ifdef CONFIG_DEBUG_FS
sam3u_dumpgpio(GPIO_PORT_PIOA, "Pins: 3-8");
sam3u_dumpgpio(GPIO_PORT_PIOB, "Pins: 28-31");
#endif
/* Reset the card and assure that it is in the initial, unconfigured
* state.
*/
sam3u_reset(&priv->dev);
return &g_sdiodev.dev;
}
/****************************************************************************
* Name: sdio_mediachange
*
* Description:
* Called by board-specific logic -- posssible from an interrupt handler --
* in order to signal to the driver that a card has been inserted or
* removed from the slot
*
* Input Parameters:
* dev - An instance of the SDIO driver device state structure.
* cardinslot - true is a card has been detected in the slot; false if a
* card has been removed from the slot. Only transitions
* (inserted->removed or removed->inserted should be reported)
*
* Returned Values:
* None
*
****************************************************************************/
void sdio_mediachange(FAR struct sdio_dev_s *dev, bool cardinslot)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)dev;
uint8_t cdstatus;
irqstate_t flags;
/* Update card status */
flags = irqsave();
cdstatus = priv->cdstatus;
if (cardinslot)
{
priv->cdstatus |= SDIO_STATUS_PRESENT;
}
else
{
priv->cdstatus &= ~SDIO_STATUS_PRESENT;
}
fvdbg("cdstatus OLD: %02x NEW: %02x\n", cdstatus, priv->cdstatus);
/* Perform any requested callback if the status has changed */
if (cdstatus != priv->cdstatus)
{
sam3u_callback(priv);
}
irqrestore(flags);
}
/****************************************************************************
* Name: sdio_wrprotect
*
* Description:
* Called by board-specific logic to report if the card in the slot is
* mechanically write protected.
*
* Input Parameters:
* dev - An instance of the SDIO driver device state structure.
* wrprotect - true is a card is writeprotected.
*
* Returned Values:
* None
*
****************************************************************************/
void sdio_wrprotect(FAR struct sdio_dev_s *dev, bool wrprotect)
{
struct sam3u_dev_s *priv = (struct sam3u_dev_s *)dev;
irqstate_t flags;
/* Update card status */
flags = irqsave();
if (wrprotect)
{
priv->cdstatus |= SDIO_STATUS_WRPROTECTED;
}
else
{
priv->cdstatus &= ~SDIO_STATUS_WRPROTECTED;
}
fvdbg("cdstatus: %02x\n", priv->cdstatus);
irqrestore(flags);
}
#endif /* CONFIG_SAM3U_HSMCI */
