/****************************************************************************
* 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
*/
/****************************************************************************
* 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_pio.h"
#include "sam_hsmci.h"
#include "sama5d3x-ek.h"
#ifdef HAVE_HSMCI
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure holds static information unique to one HSMCI peripheral */
struct sam_hsmci_state_s
{
struct sdio_dev_s *hsmci; /* R/W device handle */
pio_pinset_t pincfg; /* Card detect PIO pin configuratin */
uint8_t irq; /* Interrupt number (same as pid) */
uint8_t slotno; /* Slot number */
bool cd; /* TRUE: card is inserted */
xcpt_t handler; /* Interrupt handler */
};
/****************************************************************************
* Private Data
****************************************************************************/
/* HSCMI device state */
#ifdef CONFIG_SAMA5_HSMCI0
static int sam_hsmci0_cardetect(int irq, void *regs);
static struct sam_hsmci_state_s g_hsmci0 =
{
.pincfg = PIO_MCI0_CD,
.irq = IRQ_MCI0_CD,
.slotno = 0,
.handler = sam_hsmci0_cardetect,
};
#endif
#ifdef CONFIG_SAMA5_HSMCI1
static int sam_hsmci1_cardetect(int irq, void *regs);
static struct sam_hsmci_state_s g_hsmci1 =
{
.pincfg = PIO_MCI1_CD,
.irq = IRQ_MCI1_CD,
.slotno = 1,
.handler = sam_hsmci1_cardetect,
};
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: sam_cardinserted_internal
*
* Description:
* Check if a card is inserted into the selected HSMCI slot
*
****************************************************************************/
bool sam_cardinserted_internal(struct sam_hsmci_state_s *state)
{
bool inserted;
/* Get the state of the PIO pin */
inserted = sam_pioread(state->pincfg);
fllvdbg("Slot %d inserted: %s\n", state->slotno, inserted ? "NO" : "YES");
return !inserted;
}
/****************************************************************************
* Name: sam_hsmci_cardetect, sam_hsmci0_cardetect, and sam_hsmci1_cardetect
*
* Description:
* Card detect interrupt handlers
*
****************************************************************************/
static int sam_hsmci_cardetect(struct sam_hsmci_state_s *state)
{
/* Get the current card insertion state */
bool cd = sam_cardinserted_internal(state);
/* Has the card detect state changed? */
if (cd != state->cd)
{
/* Yes... remember that new state and inform the HSMCI driver */
state->cd = cd;
/* Report the new state to the SDIO driver */
sdio_mediachange(state->hsmci, cd);
}
return OK;
}
#ifdef CONFIG_SAMA5_HSMCI0
static int sam_hsmci0_cardetect(int irq, void *regs)
{
return sam_hsmci_cardetect(&g_hsmci0);
}
#endif
#ifdef CONFIG_SAMA5_HSMCI1
static int sam_hsmci1_cardetect(int irq, void *regs)
{
return sam_hsmci_cardetect(&g_hsmci1);
}
#endif
/****************************************************************************
* Name: sam_hsmci_state
*
* Description:
* Initialize HSMCI PIOs.
*
****************************************************************************/
static struct sam_hsmci_state_s *sam_hsmci_state(int slotno)
{
struct sam_hsmci_state_s *state = NULL;
#ifdef CONFIG_SAMA5_HSMCI0
#ifdef CONFIG_SAMA5_HSMCI1
if (slotno == 0)
#endif
{
state = &g_hsmci0;
}
#ifdef CONFIG_SAMA5_HSMCI1
else
#endif
#endif
#ifdef CONFIG_SAMA5_HSMCI1
{
state = &g_hsmci1;
}
#endif
return state;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_hsmci_initialize
*
* Description:
* Perform architecture specific initialization
*
****************************************************************************/
int sam_hsmci_initialize(int slotno, int minor)
{
struct sam_hsmci_state_s *state;
int ret;
/* Get the static HSMI description */
state = sam_hsmci_state(slotno);
if (!state)
{
fdbg("No state for slotno %d\n", slotno);
return -EINVAL;
}
/* Initialize card-detect and write-protect PIOs */
sam_configpio(state->pincfg);
/* Mount the SDIO-based MMC/SD block driver */
/* First, get an instance of the SDIO interface */
state->hsmci = sdio_initialize(slotno);
if (!state->hsmci)
{
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, state->hsmci);
if (ret != OK)
{
fdbg("Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
return ret;
}
/* Configure card detect interrupts */
sam_pioirq(state->pincfg);
(void)irq_attach(state->irq, state->handler);
/* Then inform the HSMCI driver if there is or is not a card in the slot. */
state->cd = sam_cardinserted_internal(state);
sdio_mediachange(state->hsmci, state->cd);
/* Enable card detect interrupts */
sam_pioirqenable(state->irq);
return OK;
}
/****************************************************************************
* Name: sam_cardinserted
*
* Description:
* Check if a card is inserted into the selected HSMCI slot
*
****************************************************************************/
bool sam_cardinserted(int slotno)
{
struct sam_hsmci_state_s *state;
/* Get the HSMI description */
state = sam_hsmci_state(slotno);
if (!state)
{
fdbg("No state for slotno %d\n", slotno);
return false;
}
/* Return the state of the PIO pin */
return sam_cardinserted_internal(state);
}
/****************************************************************************
* Name: sam_writeprotected
*
* Description:
* Check if a card is inserted into the selected HSMCI slot
*
****************************************************************************/
bool sam_writeprotected(int slotno)
{
/* There are no write protect pins */
return false;
}
#endif /* HAVE_HSMCI */
