/****************************************************************************
* arch/arm/src/stm32/stm32_sdio.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <sys/types.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/sdio.h>
#include <nuttx/mmcsd.h>
#include "chip.h"
#include "up_arch.h"
#include "stm32_internal.h"
#include "stm32_sdio.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure defines the state of the STM32 SDIO interface */
struct stm32_dev_s
{
struct sdio_dev_s dev; /* Standard, base MMC/SD interface */
/* STM32-specific extensions */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* SDIO interface methods ***************************************************/
/* Initialization/setup */
static void stm32_reset(FAR struct sdio_dev_s *dev);
static ubyte stm32_status(FAR struct sdio_dev_s *dev);
static void stm32_widebus(FAR struct sdio_dev_s *dev, boolean enable);
static void stm32_clock(FAR struct sdio_dev_s *dev,
enum sdio_clock_e rate);
static int stm32_setblocklen(FAR struct sdio_dev_s *dev, int blocklen,
int nblocks);
static int stm32_attach(FAR struct sdio_dev_s *dev);
/* Command/Status/Data Transfer */
static void stm32_sendcmd(FAR struct sdio_dev_s *dev, ubyte cmd,
uint32 arg, FAR const ubyte *data);
static int stm32_senddata(FAR struct sdio_dev_s *dev,
FAR const ubyte *buffer);
static int stm32_recvR1(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
static int stm32_recvR2(FAR struct sdio_dev_s *dev, uint16 buffer[8]);
static int stm32_recvR3(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
static int stm32_recvR4(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
static int stm32_recvR5(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
static int stm32_recvR6(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
static int stm32_recvdata(FAR struct sdio_dev_s *dev, FAR ubyte *buffer);
/* EVENT handler */
static void stm32_eventenable(FAR struct sdio_dev_s *dev, ubyte eventset,
boolean enable);
static ubyte stm32_eventwait(FAR struct sdio_dev_s *dev, uint32 timeout);
static ubyte stm32_events(FAR struct sdio_dev_s *dev);
/* DMA */
#ifdef CONFIG_SDIO_DMA
static boolean stm32_dmasupported(FAR struct sdio_dev_s *dev);
#ifdef CONFIG_DATA_CACHE
static void stm32_coherent(FAR struct sdio_dev_s *dev, FAR void *addr,
size_t len, boolean write);
#endif
static int stm32_dmareadsetup(FAR struct sdio_dev_s *dev,
FAR ubyte *buffer);
static int stm32_dmawritesetup(FAR struct sdio_dev_s *dev,
FAR const ubyte *buffer);
static int stm32_dmaenable(FAR struct sdio_dev_s *dev);
static int stm32_dmastart(FAR struct sdio_dev_s *dev);
static int stm32_dmastop(FAR struct sdio_dev_s *dev);
static int stm32_dmastatus(FAR struct sdio_dev_s *dev,
size_t *remaining);
#endif
/* Initialization/uninitialization/reset ************************************/
static void stm32_default(void);
/****************************************************************************
* Private Data
****************************************************************************/
struct stm32_dev_s g_mmcsd =
{
.dev =
{
.reset = stm32_reset,
.status = stm32_status,
.widebus = stm32_widebus,
.clock = stm32_clock,
.setblocklen = stm32_setblocklen,
.attach = stm32_attach,
.sendcmd = stm32_sendcmd,
.senddata = stm32_senddata,
.recvR1 = stm32_recvR1,
.recvR2 = stm32_recvR2,
.recvR3 = stm32_recvR3,
.recvR4 = stm32_recvR4,
.recvR5 = stm32_recvR5,
.recvR6 = stm32_recvR6,
.recvdata = stm32_recvdata,
.eventenable = stm32_eventenable,
.eventwait = stm32_eventwait,
.events = stm32_events,
#ifdef CONFIG_SDIO_DMA
.dmasupported = stm32_dmasupported,
#ifdef CONFIG_DATA_CACHE
.coherent = stm32_coherent,
#endif
.dmareadsetup = stm32_dmareadsetup,
.dmawritesetup = stm32_dmawritesetup,
.dmaenable = stm32_dmaenable,
.dmastart = stm32_dmastart,
.dmastop = stm32_dmastop,
.dmastatus = stm32_dmastatus,
#endif
},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_reset
*
* Description:
* Reset the MMC/SD controller. Undo all setup and initialization.
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
*
* Returned Value:
* None
*
****************************************************************************/
static void stm32_reset(FAR struct sdio_dev_s *dev)
{
}
/****************************************************************************
* Name: stm32_status
*
* Description:
* Get MMC/SD status.
*
* Input Parameters:
* dev - Device-specific state data
*
* Returned Value:
* Returns a bitset of status values (see stm32_status_* defines)
*
****************************************************************************/
static ubyte stm32_status(FAR struct sdio_dev_s *dev)
{
return 0;
}
/****************************************************************************
* Name: SDIO_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 MMC/SD device interface
* wide - TRUE: wide bus (4-bit) bus mode enabled
*
* Returned Value:
* None
*
****************************************************************************/
static void stm32_widebus(FAR struct sdio_dev_s *dev, boolean wide)
{
}
/****************************************************************************
* Name: stm32_clock
*
* Description:
* Enable/disable MMC/SD clocking
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* rate - Specifies the clocking to use (see enum sdio_clock_e)
*
* Returned Value:
* None
*
****************************************************************************/
static void stm32_clock(FAR struct sdio_dev_s *dev, enum sdio_clock_e rate)
{
}
/****************************************************************************
* Name: stm32_setblocklen
*
* Description:
* Set the MMC/SD block length and block count
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* blocklen - The block length
* nblocks - The block count
*
* Returned Value:
* OK on success; negated errno on failure
*
****************************************************************************/
static int stm32_setblocklen(FAR struct sdio_dev_s *dev, int blocklen, int nblocks)
{
return -ENOSYS;
}
/****************************************************************************
* Name: stm32_attach
*
* Description:
* Attach and prepare interrupts
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
*
* Returned Value:
* OK on success; A negated errno on failure.
*
****************************************************************************/
static int stm32_attach(FAR struct sdio_dev_s *dev)
{
return -ENOSYS;
}
/****************************************************************************
* Name: stm32_sendcmd
*
* Description:
* Send the MMC/SD command
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* cmd - The command to send
* arg - 32-bit argument required with some commands
* data - A reference to data required with some commands
*
* Returned Value:
* None
*
****************************************************************************/
static void stm32_sendcmd(FAR struct sdio_dev_s *dev, ubyte cmd,
uint32 arg, FAR const ubyte *data)
{
}
/****************************************************************************
* Name: stm32_senddata
*
* Description:
* Send more MMC/SD data
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* data - Data to be sent
*
* Returned Value:
* Number of bytes sent on succes; a negated errno on failure
*
****************************************************************************/
static int stm32_senddata(FAR struct sdio_dev_s *dev, FAR const ubyte *buffer)
{
return -ENOSYS;
}
/****************************************************************************
* Name: stm32_recvRx
*
* Description:
* Receive response to MMC/SD command
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* buffer - Buffer in which to receive the response
*
* Returned Value:
* Number of bytes sent on succes; a negated errno on failure
*
****************************************************************************/
static int stm32_recvR1(FAR struct sdio_dev_s *dev, uint16 buffer[3])
{
return -ENOSYS;
}
static int stm32_recvR2(FAR struct sdio_dev_s *dev, uint16 buffer[8])
{
return -ENOSYS;
}
static int stm32_recvR3(FAR struct sdio_dev_s *dev, uint16 buffer[3])
{
return -ENOSYS;
}
static int stm32_recvR4(FAR struct sdio_dev_s *dev, uint16 buffer[3])
{
return -ENOSYS;
}
static int stm32_recvR5(FAR struct sdio_dev_s *dev, uint16 buffer[3])
{
return -ENOSYS;
}
static int stm32_recvR6(FAR struct sdio_dev_s *dev, uint16 buffer[3])
{
return -ENOSYS;
}
/****************************************************************************
* Name: stm32_recvdata
*
* Description:
* Receive data from MMC/SD
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* buffer - Buffer in which to receive the data
*
* Returned Value:
* Number of bytes sent on succes; a negated errno on failure
*
****************************************************************************/
static int stm32_recvdata(FAR struct sdio_dev_s *dev, FAR ubyte *buffer)
{
return -ENOSYS;
}
/****************************************************************************
* Name: stm32_eventenable
*
* Description:
* Enable/disable notification of a set of MMC/SD events
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* eventset - A bitset of events to enable or disable (see MMCSDEVENT_*
* definitions
* enable - TRUE: enable event; FALSE: disable events
*
* Returned Value:
* None
*
****************************************************************************/
static void stm32_eventenable(FAR struct sdio_dev_s *dev, ubyte eventset,
boolean enable)
{
}
/****************************************************************************
* Name: stm32_eventwait
*
* Description:
* Wait for one of the enabled events to occur (or a timeout)
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* timeout - Maximum time in milliseconds to wait. Zero means no timeout.
*
* Returned Value:
* Event set containing the event(s) that ended the wait. If no events the
* returned event set is zero, then the wait was terminated by the timeout.
*
****************************************************************************/
static ubyte stm32_eventwait(FAR struct sdio_dev_s *dev, uint32 timeout)
{
return 0;
}
/****************************************************************************
* Name: stm32_events
*
* Description:
* Return the current event set. This supports polling for MMC/SD (vs.
* waiting).
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
*
* Returned Value:
* Event set containing the current events (cleared after reading).
*
****************************************************************************/
static ubyte stm32_events(FAR struct sdio_dev_s *dev)
{
return 0;
}
/****************************************************************************
* Name: stm32_dmasupported
*
* Description:
* Return TRUE if the hardware can support DMA
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
*
* Returned Value:
* TRUE if DMA is supported.
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static boolean stm32_dmasupported(FAR struct sdio_dev_s *dev)
{
return FALSE;
}
#endif
/****************************************************************************
* Name: stm32_coherent
*
* Description:
* If the processor supports a data cache, then this method will make sure
* that the contents of the DMA memory and the data cache are coherent in
* preparation for the DMA transfer. For write transfers, this may mean
* flushing the data cache, for read transfers this may mean invalidating
* the data cache.
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* addr - The beginning address of the DMA
* len - The length of the DMA
* write - TRUE: A write DMA will be performed; FALSE: a read DMA will be
* performed.
*
* Returned Value:
* None
*
****************************************************************************/
#if defined(CONFIG_SDIO_DMA) && defined(CONFIG_DATA_CACHE)
static void stm32_coherent(FAR struct sdio_dev_s *dev, FAR void *addr,
size_t len, boolean write)
{
}
#endif
/****************************************************************************
* Name: stm32_dmareadsetup
*
* Description:
* Setup to perform a read DMA
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* buffer - The memory to DMA from
*
* Returned Value:
* OK on succes; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static int tm32_dmareadsetup(FAR struct sdio_dev_s *dev, FAR ubyte *buffer)
{
return -ENOSYS;
}
#endif
/****************************************************************************
* Name: stm32_dmawritesetup
*
* Description:
* Setup to perform a write DMA
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* buffer - The memory to DMA into
*
* Returned Value:
* OK on succes; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static int stm32_dmawritesetup(FAR struct sdio_dev_s *dev,
FAR const ubyte *buffer)
{
return -ENOSYS;
}
#endif
/****************************************************************************
* Name: stm32_dmastart
*
* Description:
* Start the DMA
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
*
* Returned Value:
* OK on succes; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static int stm32_dmastart(FAR struct sdio_dev_s *dev)
{
return -ENOSYS;
}
#endif
/****************************************************************************
* Name: stm32_dmastop
*
* Description:
* Stop the DMA
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
*
* Returned Value:
* OK on succes; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static int stm32_dmastop(FAR struct sdio_dev_s *dev)
{
return -ENOSYS;
}
#endif
/****************************************************************************
* Name: stm32_dmastatus
*
* Description:
* Returnt the number of bytes remaining in the DMA transfer
*
* Input Parameters:
* dev - An instance of the MMC/SD device interface
* remaining - A pointer to location in which to return the number of bytes
* remaining in the transfer.
*
* Returned Value:
* OK on succes; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_SDIO_DMA
static int stm32_dmastatus(FAR struct sdio_dev_s *dev, size_t *remaining)
{
return -ENOSYS;
}
#endif
/****************************************************************************
* Initialization/uninitialization/reset
****************************************************************************/
/****************************************************************************
* Name: stm32_default
*
* Description:
* Restore SDIO registers to their default, reset values
*
****************************************************************************/
static void stm32_default(void)
{
putreg32(SDIO_POWER_RESET, STM32_SDIO_POWER);
putreg32(SDIO_CLKCR_RESET, STM32_SDIO_CLKCR);
putreg32(SDIO_ARG_RESET, STM32_SDIO_ARG);
putreg32(SDIO_CMD_RESET, STM32_SDIO_CMD);
putreg32(SDIO_DTIMER_RESET, STM32_SDIO_DTIMER);
putreg32(SDIO_DLEN_RESET, STM32_SDIO_DLEN);
putreg32(SDIO_DCTRL_RESET, STM32_SDIO_DCTRL);
putreg32(SDIO_ICR_RESET, STM32_SDIO_ICR);
putreg32(SDIO_MASK_RESET, STM32_SDIO_MASK);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* 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.
*
****************************************************************************/
int mmcsd_slotinitialize(int minor, int slotno, FAR struct sdio_dev_s *dev)
{
return -ENOSYS;
}
