Add skeleton file that will hold the STM32 SDIO driver
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@2244 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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patacongo
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/****************************************************************************
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* arch/arm/src/stm32/stm32_sdio.c
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/sdio.h>
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#include <nuttx/mmcsd.h>
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#include "chip.h"
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#include "up_arch.h"
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#include "stm32_internal.h"
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#include "stm32_sdio.h"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure defines the state of the STM32 SDIO interface */
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struct stm32_dev_s
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{
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struct sdio_dev_s dev; /* Standard, base MMC/SD interface */
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/* STM32-specific extensions */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* SDIO interface methods ***************************************************/
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/* Initialization/setup */
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static void stm32_reset(FAR struct sdio_dev_s *dev);
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static ubyte stm32_status(FAR struct sdio_dev_s *dev);
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static void stm32_widebus(FAR struct sdio_dev_s *dev, boolean enable);
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static void stm32_clock(FAR struct sdio_dev_s *dev,
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enum sdio_clock_e rate);
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static int stm32_setblocklen(FAR struct sdio_dev_s *dev, int blocklen,
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int nblocks);
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static int stm32_attach(FAR struct sdio_dev_s *dev);
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/* Command/Status/Data Transfer */
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static void stm32_sendcmd(FAR struct sdio_dev_s *dev, ubyte cmd,
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uint32 arg, FAR const ubyte *data);
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static int stm32_senddata(FAR struct sdio_dev_s *dev,
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FAR const ubyte *buffer);
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static int stm32_recvR1(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
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static int stm32_recvR2(FAR struct sdio_dev_s *dev, uint16 buffer[8]);
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static int stm32_recvR3(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
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static int stm32_recvR4(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
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static int stm32_recvR5(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
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static int stm32_recvR6(FAR struct sdio_dev_s *dev, uint16 buffer[3]);
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static int stm32_recvdata(FAR struct sdio_dev_s *dev, FAR ubyte *buffer);
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/* EVENT handler */
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static void stm32_eventenable(FAR struct sdio_dev_s *dev, ubyte eventset,
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boolean enable);
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static ubyte stm32_eventwait(FAR struct sdio_dev_s *dev, uint32 timeout);
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static ubyte stm32_events(FAR struct sdio_dev_s *dev);
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/* DMA */
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#ifdef CONFIG_SDIO_DMA
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static boolean stm32_dmasupported(FAR struct sdio_dev_s *dev);
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#ifdef CONFIG_DATA_CACHE
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static void stm32_coherent(FAR struct sdio_dev_s *dev, FAR void *addr,
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size_t len, boolean write);
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#endif
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static int stm32_dmareadsetup(FAR struct sdio_dev_s *dev,
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FAR ubyte *buffer);
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static int stm32_dmawritesetup(FAR struct sdio_dev_s *dev,
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FAR const ubyte *buffer);
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static int stm32_dmaenable(FAR struct sdio_dev_s *dev);
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static int stm32_dmastart(FAR struct sdio_dev_s *dev);
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static int stm32_dmastop(FAR struct sdio_dev_s *dev);
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static int stm32_dmastatus(FAR struct sdio_dev_s *dev,
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size_t *remaining);
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#endif
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/* Initialization/uninitialization/reset ************************************/
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static void stm32_default(void);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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struct stm32_dev_s g_mmcsd =
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{
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.dev =
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{
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.reset = stm32_reset,
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.status = stm32_status,
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.widebus = stm32_widebus,
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.clock = stm32_clock,
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.setblocklen = stm32_setblocklen,
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.attach = stm32_attach,
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.sendcmd = stm32_sendcmd,
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.senddata = stm32_senddata,
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.recvR1 = stm32_recvR1,
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.recvR2 = stm32_recvR2,
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.recvR3 = stm32_recvR3,
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.recvR4 = stm32_recvR4,
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.recvR5 = stm32_recvR5,
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.recvR6 = stm32_recvR6,
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.recvdata = stm32_recvdata,
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.eventenable = stm32_eventenable,
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.eventwait = stm32_eventwait,
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.events = stm32_events,
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#ifdef CONFIG_SDIO_DMA
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.dmasupported = stm32_dmasupported,
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#ifdef CONFIG_DATA_CACHE
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.coherent = stm32_coherent,
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#endif
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.dmareadsetup = stm32_dmareadsetup,
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.dmawritesetup = stm32_dmawritesetup,
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.dmaenable = stm32_dmaenable,
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.dmastart = stm32_dmastart,
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.dmastop = stm32_dmastop,
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.dmastatus = stm32_dmastatus,
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#endif
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},
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_reset
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*
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* Description:
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* Reset the MMC/SD controller. Undo all setup and initialization.
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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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static void stm32_reset(FAR struct sdio_dev_s *dev)
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{
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}
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/****************************************************************************
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* Name: stm32_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 stm32_status_* defines)
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*
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****************************************************************************/
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static ubyte stm32_status(FAR struct sdio_dev_s *dev)
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{
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return 0;
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}
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/****************************************************************************
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* Name: SDIO_WIDEBUS
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*
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* Description:
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* Called after change in Bus width has been selected (via ACMD6). Most
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* controllers will need to perform some special operations to work
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* correctly in the new bus mode.
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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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* wide - TRUE: wide bus (4-bit) bus mode enabled
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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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static void stm32_widebus(FAR struct sdio_dev_s *dev, boolean wide)
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{
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}
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/****************************************************************************
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* Name: stm32_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 sdio_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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static void stm32_clock(FAR struct sdio_dev_s *dev, enum sdio_clock_e rate)
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{
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}
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/****************************************************************************
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* Name: stm32_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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static int stm32_setblocklen(FAR struct sdio_dev_s *dev, int blocklen, int nblocks)
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{
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: stm32_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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static int stm32_attach(FAR struct sdio_dev_s *dev)
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{
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: stm32_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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static void stm32_sendcmd(FAR struct sdio_dev_s *dev, ubyte cmd,
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uint32 arg, FAR const ubyte *data)
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{
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}
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/****************************************************************************
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* Name: stm32_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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static int stm32_senddata(FAR struct sdio_dev_s *dev, FAR const ubyte *buffer)
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{
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: stm32_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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static int stm32_recvR1(FAR struct sdio_dev_s *dev, uint16 buffer[3])
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{
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return -ENOSYS;
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}
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static int stm32_recvR2(FAR struct sdio_dev_s *dev, uint16 buffer[8])
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{
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return -ENOSYS;
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}
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static int stm32_recvR3(FAR struct sdio_dev_s *dev, uint16 buffer[3])
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{
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return -ENOSYS;
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}
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static int stm32_recvR4(FAR struct sdio_dev_s *dev, uint16 buffer[3])
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{
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return -ENOSYS;
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}
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static int stm32_recvR5(FAR struct sdio_dev_s *dev, uint16 buffer[3])
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{
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return -ENOSYS;
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}
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static int stm32_recvR6(FAR struct sdio_dev_s *dev, uint16 buffer[3])
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{
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: stm32_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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static int stm32_recvdata(FAR struct sdio_dev_s *dev, FAR ubyte *buffer)
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{
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return -ENOSYS;
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}
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/****************************************************************************
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* Name: stm32_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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static void stm32_eventenable(FAR struct sdio_dev_s *dev, ubyte eventset,
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boolean enable)
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{
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}
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/****************************************************************************
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* Name: stm32_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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static ubyte stm32_eventwait(FAR struct sdio_dev_s *dev, uint32 timeout)
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{
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return 0;
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}
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/****************************************************************************
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* Name: stm32_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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static ubyte stm32_events(FAR struct sdio_dev_s *dev)
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{
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return 0;
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}
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/****************************************************************************
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* Name: stm32_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_SDIO_DMA
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static boolean stm32_dmasupported(FAR struct sdio_dev_s *dev)
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{
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return FALSE;
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}
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#endif
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/****************************************************************************
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* Name: stm32_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_SDIO_DMA) && defined(CONFIG_DATA_CACHE)
|
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static void stm32_coherent(FAR struct sdio_dev_s *dev, FAR void *addr,
|
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size_t len, boolean write)
|
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{
|
||||
}
|
||||
#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;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue