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dd0e465239
nuttx/configs/sama5d3x-ek/src/sam_hsmci.c
Gregory Nutt dd0e465239 SAMA5: Add HSMCI memory card driver support
2013-08-05 16:21:24 -06:00

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/****************************************************************************
* config/sama5d3x-ek/src/sam_hsmci.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/* The SAMA5D3x-EK provides a two SD memory card slots: (1) a full size SD card
* slot (J7 labeled MCI0), and (2) a microSD memory card slot (J6 labeled MCI1).
*
* The full size SD card slot connects via HSMCI0. The card detect discrete
* is available on PB17 (pulled high). The write protect descrete is tied to
* ground (via PP6) and not available to software. The slot supports 8-bit
* wide transfer mode, but the NuttX driver currently uses only the 4-bit
* wide transfer mode
*
* PD17 MCI0_CD
* PD1 MCI0_DA0
* PD2 MCI0_DA1
* PD3 MCI0_DA2
* PD4 MCI0_DA3
* PD5 MCI0_DA4
* PD6 MCI0_DA5
* PD7 MCI0_DA6
* PD8 MCI0_DA7
* PD9 MCI0_CK
* PD0 MCI0_CDA
*
* The microSD connects vi HSMCI1. The card detect discrete is available on
* PB18 (pulled high):
*
* PD18 MCI1_CD
* PB20 MCI1_DA0
* PB21 MCI1_DA1
* PB22 MCI1_DA2
* PB23 MCI1_DA3
* PB24 MCI1_CK
* PB19 MCI1_CDA
*/
/* SPI Chip Selects *****************************************************************/
/* Both the Ronetix and Embest versions of the SAMAD3x CPU modules include an
* Atmel AT25DF321A, 32-megabit, 2.7-volt SPI serial flash. The SPI
* connection is as follows:
*
* AT25DF321A SAMA5
* --------------- -----------------------------------------------
* SI PD11 SPI0_MOSI
* SO PD10 SPI0_MIS0
* SCK PD12 SPI0_SPCK
* /CS PD13 via NL17SZ126 if JP1 is closed (See below)
*
* JP1 and JP2 seem to related to /CS on the Ronetix board, but the usage is
* less clear. For the Embest module, JP1 must be closed to connect /CS to
* PD13; on the Ronetix schematic, JP11 seems only to bypass a resistor (may
* not be populated?). I think closing JP1 is correct in either case.
*/
#define GPIO_AT25_NPCS0 (GPIO_OUTPUT | GPIO_CFG_PULLUP | GPIO_OUTPUT_SET | \
GPIO_PORT_PIOD | GPIO_PIN13)
#define AT25_PORT SPI0_CS0
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/sdio.h>
#include <nuttx/mmcsd.h>
#include "sam_hsmci.h"
#include "sama5d3x-ek.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* This needs to be extended. The card detect GPIO must be configured as an
* interrupt. When the interrupt indicating that a card has been inserted
* or removed is received, this function must call sio_mediachange() to
* handle that event.
*/
#warning "Card detect interrupt handling needed"
/* Configuration ************************************************************/
#define HAVE_MMCSD 1
/* Can't support MMC/SD if the card interface(s) are not enable */
#if !defined(CONFIG_SAMA5_HSMCI0) && !defined(CONFIG_SAMA5_HSMCI0)
# undef HAVE_MMCSD
#endif
/* Can't support MMC/SD features if mountpoints are disabled */
#if defined(CONFIG_DISABLE_MOUNTPOINT)
# undef HAVE_MMCSD
#endif
#ifdef HAVE_MMCSD
# if defined(CONFIG_NSH_MMCSDSLOTNO) && CONFIG_NSH_MMCSDSLOTNO != 0
# undef CONFIG_NSH_MMCSDSLOTNO
# endif
# ifndef CONFIG_NSH_MMCSDMINOR
# define CONFIG_NSH_MMCSDMINOR 0
# endif
# ifndef CONFIG_NSH_MMCSDSLOTNO
# define CONFIG_NSH_MMCSDSLOTNO 0
# endif
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/************************************************************************************
* Name: sam_hsmci_gpioinit
*
* Description:
* Initialize HSMCI support. This function is called very early in board
* initialization.
*
************************************************************************************/
#ifdef HAVE_MMCSD
static void sam_hsmci_gpioinit(int slotno)
{
#ifdef CONFIG_SAMA5_HSMCI0
#ifdef CONFIG_SAMA5_HSMCI1
if (slotno == 0)
#endif
{
sam_configgpio(GPIO_MCI0_CD);
}
#ifdef CONFIG_SAMA5_HSMCI1
else
#endif
#endif
#ifdef CONFIG_SAMA5_HSMCI1
{
sam_configgpio(GPIO_MCI1_CD);
}
#endif
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_hsmci_initialize
*
* Description:
* Perform architecture specific initialization
*
****************************************************************************/
#if defined(CONFIG_SAMA5_HSMCI0) || defined(CONFIG_SAMA5_HSMCI1)
int sam_hsmci_initialize(int slotno, int minor)
{
#ifdef HAVE_MMCSD
FAR struct sdio_dev_s *sdio;
int ret;
/* Initialize card-detect and write-protect GPIOs */
sam_hsmci_gpioinit(slotno);
/* Mount the SDIO-based MMC/SD block driver */
/* First, get an instance of the SDIO interface */
sdio = sdio_initialize(slotno);
if (!sdio)
{
fdbg("Failed to initialize SDIO slot %d\n", slotno);
return -ENODEV;
}
/* Now bind the SDIO interface to the MMC/SD driver */
ret = mmcsd_slotinitialize(minor, sdio);
if (ret != OK)
{
fdbg("Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
return ret;
}
/* Then inform the HSMCI driver if there is or is not a card in the slot. */
sdio_mediachange(sdio, sam_cardinserted(slotno));
#endif
return OK;
}
/************************************************************************************
* Name: sam_cardinserted
*
* Description:
* Check if a card is inserted into the selected HSMCI slot
*
************************************************************************************/
#if defined(CONFIG_SAMA5_HSMCI0) || defined(CONFIG_SAMA5_HSMCI1)
bool sam_cardinserted(int slotno)
{
#ifdef HAVE_MMCSD
#ifdef CONFIG_SAMA5_HSMCI0
#ifdef CONFIG_SAMA5_HSMCI1
if (slotno == 0)
#endif /* CONFIG_SAMA5_HSMCI1 */
{
bool inserted = sam_gpioread(GPIO_MCI0_CD);
fvdbg("Slot 0 inserted: %s\n", inserted ? "NO" : "YES");
return !inserted;
}
#ifdef CONFIG_SAMA5_HSMCI1
else
#endif /* CONFIG_SAMA5_HSMCI1 */
#endif /* CONFIG_SAMA5_HSMCI0 */
#ifdef CONFIG_SAMA5_HSMCI1
{
bool inserted = sam_gpioread(GPIO_MCI1_CD);
fvdbg("Slot 1 inserted: %s\n", inserted ? "NO" : "YES");
return !inserted;
}
#endif /* CONFIG_SAMA5_HSMCI1 */
#else /* HAVE_MMCSD */
return false;
#endif /* HAVE_MMCSD */
}
#endif /* CONFIG_SAMA5_HSMCIO || CONFIG_SAMA5_HSMCI1 */
/************************************************************************************
* Name: sam_writeprotected
*
* Description:
* Check if a card is inserted into the selected HSMCI slot
*
************************************************************************************/
#if defined(CONFIG_SAMA5_HSMCI0) || defined(CONFIG_SAMA5_HSMCI1)
bool sam_writeprotected(int slotno)
{
/* There are no write protect pins */
return false;
}
#endif
#endif /* CONFIG_SAMA5_HSMCI0 || CONFIG_SAMA5_HSMCI1 */
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