First cut at SDIO MMC/SD interface
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2236 42af7a65-404d-4744-a932-0658087f49c3
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@ -47,10 +47,488 @@
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* Pre-Processor Definitions
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****************************************************************************/
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/* MMC/SD events needed by the driver */
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#define MMCSDEVENT_EJECTED (1 << 0) /* Bit 0: CD/DAT3 transition low, media removed */
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#define MMCSDEVENT_INSERTED (1 << 1) /* Bit 1: CD/DAT3 transition high, media inserted */
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#define MMCSDEVENT_CMDDONE (1 << 2) /* Bit 2: Command+response complete */
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#define MMCSDEVENT_READCMDDONE (1 << 3) /* Bit 3: Read command done */
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#define MMCSDEVENT_WRITECMDDONE (1 << 4) /* Bit 4: Write command done */
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#define MMCSDEVENT_READDATADONE (1 << 5) /* Bit 5: Read data done */
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#define MMCSDEVENT_WRITEDATADONE (1 << 6) /* Bit 6: Write data done */
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#define MMCSDEVENT_CMDBUSYDONE (1 << 7) /* Bit 7: Command with transition to not busy */
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#define MMCSDEVENT_ALLEVENTS 0xff
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/****************************************************************************
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* Name: MMCSD_RESET
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*
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* Description:
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* Reset the MMC/SD controller
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#define MMCSD_RESET(dev) ((dev)->reset(dev))
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/****************************************************************************
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* Name: MMCSD_STATUS
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*
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* Description:
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* Get MMC/SD status.
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*
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* Input Parameters:
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* dev - Device-specific state data
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*
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* Returned Value:
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* Returns a bitset of status values (see MMCSD_STATUS_* defines)
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*
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****************************************************************************/
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#define MMCSD_STATUS(dev) ((d)->status(dev))
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/* MMC/SD status bits */
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#define MMCSD_STATUS_PRESENT 0x01 /* Bit 0=1: MMC/SD card present */
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#define MMCSD_STATUS_WRPROTECTED 0x02 /* Bit 1=1: MMC/SD card write protected */
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#define MMCSD_PRESENT(dev) ((MMCSD_STATUS(dev) & MMCSD_STATUS_PRESENT) != 0)
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#define MMCSD_WRPROTECTED(dev) ((MMCSD_STATUS(dev) & MMCSD_STATUS_WRPROTECTED) != 0)
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/****************************************************************************
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* Name: MMCSD_WIDEBUS
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*
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* Description:
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* Enable/disable wide (4-bit) data bus
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* enable - TRUE: enable wide bus
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#define MMCSD_WIDEBUS(dev,enable) ((dev)->widebus(dev,enable))
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/****************************************************************************
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* Name: MMCSD_CLOCK
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*
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* Description:
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* Enable/disable MMC/SD clocking
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* rate - Specifies the clocking to use (see enum mmcsd_clock_e)
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#define MMCSD_CLOCK(dev,rate) ((dev)->clock(dev,rate))
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/****************************************************************************
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* Name: MMCSD_SETBLOCKLEN
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*
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* Description:
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* Set the MMC/SD block length and block count
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* blocklen - The block length
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* nblocks - The block count
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*
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* Returned Value:
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* OK on success; negated errno on failure
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*
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****************************************************************************/
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#define MMCSD_SETBLOCKLEN(dev,blocklen,nblocks) \
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((dev)->setblocklen(dev,blocklen,nblocks))
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/****************************************************************************
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* Name: MMCSD_ATTACH
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*
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* Description:
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* Attach and prepare interrupts
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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*
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* Returned Value:
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* OK on success; A negated errno on failure.
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*
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****************************************************************************/
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#define MMCSD_ATTACH(dev) ((dev)->attach(dev))
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/****************************************************************************
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* Name: MMCSD_SENDCMD
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*
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* Description:
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* Send the MMC/SD command
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* cmd - The command to send
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* arg - 32-bit argument required with some commands
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* data - A reference to data required with some commands
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#define MMCSD_SENDCMD(dev,cmd,arg,data) ((dev)->sendcmd(dev,cmd,arg,data))
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/****************************************************************************
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* Name: MMCSD_SENDDATA
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*
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* Description:
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* Send more MMC/SD data
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* data - Data to be sent
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*
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* Returned Value:
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* Number of bytes sent on succes; a negated errno on failure
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*
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****************************************************************************/
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#define MMCSD_SENDDATA(dev,data) ((dev)->senddata(dev,data))
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/****************************************************************************
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* Name: MMCSD_RECVRx
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*
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* Description:
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* Receive response to MMC/SD command
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* buffer - Buffer in which to receive the response
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*
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* Returned Value:
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* Number of bytes sent on succes; a negated errno on failure
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*
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****************************************************************************/
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#define MMCSD_RECVR1(dev,buffer) ((dev)->recvR1(dev,buffer))
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#define MMCSD_RECVR2(dev,buffer) ((dev)->recvR2(dev,buffer))
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#define MMCSD_RECVR3(dev,buffer) ((dev)->recvR3(dev,buffer))
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#define MMCSD_RECVR4(dev,buffer) ((dev)->recvR4(dev,buffer))
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#define MMCSD_RECVR5(dev,buffer) ((dev)->recvR5(dev,buffer))
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#define MMCSD_RECVR6(dev,buffer) ((dev)->recvR6(dev,buffer))
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/****************************************************************************
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* Name: MMCSD_RECVDATA
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*
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* Description:
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* Receive data from MMC/SD
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* buffer - Buffer in which to receive the data
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*
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* Returned Value:
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* Number of bytes sent on succes; a negated errno on failure
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*
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****************************************************************************/
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#define MMCSD_RECVDATA(dev,buffer) ((dev)->recvdata(dev,buffer))
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/****************************************************************************
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* Name: MMCSD_EVENTENABLE
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*
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* Description:
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* Enable/disable notification of a set of MMC/SD events
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* eventset - A bitset of events to enable or disable (see MMCSDEVENT_*
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* definitions
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* enable - TRUE: enable event; FALSE: disable events
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#define MMCSD_EVENTENABLE(dev,eventset) ((dev)->eventenable(dev,eventset,TRUE))
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#define MMCSD_EVENTDISABLE(dev,eventset) ((dev)->eventenable(dev,eventset,FALSE))
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#define MMCSD_EVENTDISABLEALL(dev) ((dev)->eventenable(dev,MMCSDEVENT_ALLEVENTS,FALSE))
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/****************************************************************************
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* Name: MMCSD_EVENTWAIT
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*
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* Description:
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* Wait for one of the enabled events to occur (or a timeout)
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* timeout - Maximum time in milliseconds to wait. Zero means no timeout.
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*
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* Returned Value:
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* Event set containing the event(s) that ended the wait. If no events the
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* returned event set is zero, then the wait was terminated by the timeout.
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*
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****************************************************************************/
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#define MMCSD_EVENTWAIT(dev,timeout) ((dev)->eventwait(dev,timeout))
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/****************************************************************************
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* Name: MMCSD_EVENTS
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*
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* Description:
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* Return the current event set. This supports polling for MMC/SD (vs.
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* waiting).
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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*
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* Returned Value:
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* Event set containing the current events (cleared after reading).
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*
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****************************************************************************/
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#define MMCSD_EVENTS(dev) ((dev)->events(dev))
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/****************************************************************************
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* Name: MMCSD_DMASUPPORTED
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*
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* Description:
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* Return TRUE if the hardware can support DMA
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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*
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* Returned Value:
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* TRUE if DMA is supported.
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*
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****************************************************************************/
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#ifdef CONFIG_MMCSD_DMA
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# define MMCSD_DMASUPPORTED(dev) ((dev)->dmasupported(dev))
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#else
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# define MMCSD_DMASUPPORTED(dev) (FALSE)
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#endif
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/****************************************************************************
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* Name: MMCSD_COHERENT
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*
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* Description:
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* If the processor supports a data cache, then this method will make sure
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* that the contents of the DMA memory and the data cache are coherent in
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* preparation for the DMA transfer. For write transfers, this may mean
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* flushing the data cache, for read transfers this may mean invalidating
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* the data cache.
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* addr - The beginning address of the DMA
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* len - The length of the DMA
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* write - TRUE: A write DMA will be performed; FALSE: a read DMA will be
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* performed.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#if defined(CONFIG_MMCSD_DMA) && defined(CONFIG_DATA_CACHE)
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# define MMCSD_COHERENT(dev,addr,len,write) ((dev)->coherent(dev,addr,len,write))
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#else
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# define MMCSD_COHERENT(dev,addr,len,write)
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#endif
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/****************************************************************************
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* Name: MMCSD_DMAREADSETUP
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*
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* Description:
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* Setup to perform a read DMA
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* buffer - The memory to DMA from
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*
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* Returned Value:
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* OK on succes; a negated errno on failure
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*
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****************************************************************************/
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#ifdef CONFIG_MMCSD_DMA
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# define MMCSD_DMAREADSETUP(dev,buffer) ((dev)->dmareadsetup(dev,buffer))
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#else
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# define MMCSD_DMAREADSETUP(dev,buffer) (-ENOSYS)
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#endif
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/****************************************************************************
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* Name: MMCSD_DMAWRITESETUP
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*
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* Description:
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* Setup to perform a write DMA
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* buffer - The memory to DMA into
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*
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* Returned Value:
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* OK on succes; a negated errno on failure
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*
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****************************************************************************/
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#ifdef CONFIG_MMCSD_DMA
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# define MMCSD_DMAWRITESETUP(dev,buffer) ((dev)->dmawritesetup(dev,buffer))
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#else
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# define MMCSD_DMAWRITESETUP(dev,buffer) (-ENOSYS)
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#endif
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/****************************************************************************
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* Name: MMCSD_DMASTART
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*
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* Description:
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* Start the DMA
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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*
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* Returned Value:
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* OK on succes; a negated errno on failure
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*
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****************************************************************************/
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#ifdef CONFIG_MMCSD_DMA
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# define MMCSD_DMASTART(dev) ((dev)->dmastart(dev))
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#else
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# define MMCSD_DMASTART(dev) (-ENOSYS)
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#endif
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/****************************************************************************
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* Name: MMCSD_DMASTOP
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*
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* Description:
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* Stop the DMA
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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*
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* Returned Value:
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* OK on succes; a negated errno on failure
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*
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****************************************************************************/
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#ifdef CONFIG_MMCSD_DMA
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# define MMCSD_DMASTOP(dev) ((dev)->dmastop(dev))
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#else
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# define MMCSD_DMASTOP(dev) (-ENOSYS)
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#endif
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/****************************************************************************
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* Name: MMCSD_DMASTATUS
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*
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* Description:
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* Returnt the number of bytes remaining in the DMA transfer
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*
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* Input Parameters:
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* dev - An instance of the MMC/SD device interface
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* remaining - A pointer to location in which to return the number of bytes
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* remaining in the transfer.
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*
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* Returned Value:
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* OK on succes; a negated errno on failure
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*
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****************************************************************************/
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#ifdef CONFIG_MMCSD_DMA
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# define MMCSD_DMASTATUS(dev,remaining) ((dev)->dmastatus(dev,remaining))
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#else
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# define MMCSD_DMASTATUS(dev,remaining) (-ENOSYS)
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* Various clocking used by the MMC/SD driver */
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enum mmcsd_clock_e
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{
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CLOCK_MMCSD_DISABLED = 0, /* Clock is disabled */
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CLOCK_MMC_SLOW, /* MMC initialization clocking */
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CLOCK_SD_SLOW, /* SD initialization clocking */
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CLOCK_MMC_FAST, /* MMC normal operation clocking */
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CLOCK_SD_FAST, /* SD normal operation clocking */
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};
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/* This structure defines the interface between the NuttX MMC/SD
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* driver and the chip- or board-specific MMC/SD interface. This
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* interface is only used in architectures that support MMC/SD
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* 1- or 4-bit data busses. This interface is registered with
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* the NuttX MMC/SD driver by calling mmcsd_slotinitialize() as
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* described below.
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*
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* Architectures that use an SPI interface to the MMC/SD slot
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* should support, instead, the struct spi_dev_s interface (see
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* include/nuttx/spi.h and the mmcsd_spislotinitialize() interface
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* below.
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*/
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struct mmcsd_dev_s
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{
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/* See descriptions of each method in the access macros provided
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* above.
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*/
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/* Initialization/setup */
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void (*reset)(FAR struct mmcsd_dev_s *dev);
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ubyte (*status)(FAR struct mmcsd_dev_s *dev);
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void (*widebus)(FAR struct mmcsd_dev_s *dev, boolean enable);
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void (*clock)(FAR struct mmcsd_dev_s *dev, enum mmcsd_clock_e rate);
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int (*setblocklen)(FAR struct mmcsd_dev_s *dev, int blocklen, int nblocks);
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int (*attach)(FAR struct mmcsd_dev_s *dev);
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/* Command/Status/Data Transfer */
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void (*sendcmd)(FAR struct mmcsd_dev_s *dev, ubyte cmd, uint32 arg, FAR const ubyte *data);
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int (*senddata)(FAR struct mmcsd_dev_s *dev, FAR const ubyte *buffer);
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int (*recvR1)(FAR struct mmcsd_dev_s *dev, uint16 buffer[3]);
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int (*recvR2)(FAR struct mmcsd_dev_s *dev, uint16 buffer[8]);
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int (*recvR3)(FAR struct mmcsd_dev_s *dev, uint16 buffer[3]);
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int (*recvR4)(FAR struct mmcsd_dev_s *dev, uint16 buffer[3]);
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int (*recvR5)(FAR struct mmcsd_dev_s *dev, uint16 buffer[3]);
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int (*recvR6)(FAR struct mmcsd_dev_s *dev, uint16 buffer[3]);
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int (*recvdata)(FAR struct mmcsd_dev_s *dev, FAR ubyte *buffer);
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/* EVENT handler */
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void (*eventenable)(FAR struct mmcsd_dev_s *dev, ubyte eventset, boolean enable);
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ubyte (*eventwait)(FAR struct mmcsd_dev_s *dev, uint32 timeout);
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ubyte (*events)(FAR struct mmcsd_dev_s *dev);
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/* DMA */
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#ifdef CONFIG_MMCSD_DMA
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boolean (*dmasupported)(FAR struct mmcsd_dev_s *dev);
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#ifdef CONFIG_DATA_CACHE
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void (*coherent)(FAR struct mmcsd_dev_s *dev, FAR void *addr, size_t len, boolean write);
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#endif
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int (*dmareadsetup)(FAR struct mmcsd_dev_s *dev, FAR ubyte *buffer);
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int (*dmawritesetup)(FAR struct mmcsd_dev_s *dev, FAR const ubyte *buffer);
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int (*dmaenable)(FAR struct mmcsd_dev_s *dev);
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int (*dmastop)(FAR struct mmcsd_dev_s *dev);
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int (*dmastatus)(FAR struct mmcsd_dev_s *dev, size_t *remaining);
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#endif
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};
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@ -63,6 +541,25 @@ extern "C" {
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#define EXTERN extern
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#endif
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||||
|
||||
/****************************************************************************
|
||||
* Name: mmcsd_slotinitialize
|
||||
*
|
||||
* Description:
|
||||
* Initialize one slot for operation using the MMC/SD interface
|
||||
*
|
||||
* Input Parameters:
|
||||
* minor - The MMC/SD minor device number. The MMC/SD device will be
|
||||
* registered as /dev/mmcsdN where N is the minor number
|
||||
* slotno - The slot number to use. This is only meaningful for architectures
|
||||
* that support multiple MMC/SD slots. This value must be in the range
|
||||
* {0, ..., CONFIG_MMCSD_NSLOTS}.
|
||||
* dev - And instance of an MMC/SD interface. The MMC/SD hardware should
|
||||
* be initialized and ready to use.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int mmcsd_slotinitialize(int minor, int slotno, FAR FAR struct mmcsd_dev_s *dev);
|
||||
|
||||
/****************************************************************************
|
||||
* Name: mmcsd_spislotinitialize
|
||||
*
|
||||
|
||||
@ -153,11 +153,11 @@
|
||||
* Get SPI/MMC status. Optional.
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* dev - Device-specific state data
|
||||
* devid - Identifies the device to report status on
|
||||
*
|
||||
* Returned Value:
|
||||
* Returns a bitset of status values (see SPI_STATUS_* defines
|
||||
* Returns a bitset of status values (see SPI_STATUS_* defines)
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user