321 lines
9.3 KiB
C
321 lines
9.3 KiB
C
/****************************************************************************
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* config/samv71-xult/src/sam_hsmci.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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/* The SAM V71 Xplained Ultra has one standard SD card connector which is
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* connected to the High Speed Multimedia Card Interface (HSMCI) of the SAM
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* V71. SD card connector:
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*
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* ------ ----------------- ---------------------
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* SAMV71 SAMV71 Shared functionality
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* Pin Function
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* ------ ----------------- ---------------------
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* PA30 MCDA0 (DAT0)
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* PA31 MCDA1 (DAT1)
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* PA26 MCDA2 (DAT2)
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* PA27 MCDA3 (DAT3) Camera
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* PA25 MCCK (CLK) Shield
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* PA28 MCCDA (CMD)
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* PD18 Card Detect (C/D) Shield
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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 <stdbool.h>
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#include <stdio.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 "sam_gpio.h"
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#include "sam_hsmci.h"
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#include "samv71-xult.h"
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#ifdef HAVE_HSMCI
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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 holds static information unique to one HSMCI peripheral */
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struct sam_hsmci_state_s
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{
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struct sdio_dev_s *hsmci; /* R/W device handle */
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gpio_pinset_t cdcfg; /* Card detect GPIO pin configuration */
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gpio_pinset_t pwrcfg; /* Power GPIO pin configuration */
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uint8_t irq; /* Interrupt number (same as pid) */
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uint8_t slotno; /* Slot number */
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bool cd; /* TRUE: card is inserted */
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xcpt_t handler; /* Interrupt handler */
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* HSCMI device state */
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#ifdef CONFIG_SAMV7_HSMCI0
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static int sam_hsmci0_cardetect(int irq, void *regs, FAR void *arg);
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static struct sam_hsmci_state_s g_hsmci0 =
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{
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.cdcfg = GPIO_MCI0_CD,
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.irq = IRQ_MCI0_CD,
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.slotno = 0,
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.handler = sam_hsmci0_cardetect,
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};
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_cardinserted_internal
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*
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* Description:
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* Check if a card is inserted into the selected HSMCI slot
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*
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****************************************************************************/
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bool sam_cardinserted_internal(struct sam_hsmci_state_s *state)
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{
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bool inserted;
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/* Get the state of the GPIO pin */
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inserted = sam_gpioread(state->cdcfg);
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mcinfo("Slot %d inserted: %s\n", state->slotno, inserted ? "NO" : "YES");
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return !inserted;
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}
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/****************************************************************************
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* Name: sam_hsmci_cardetect, sam_hsmci0_cardetect, and sam_hsmci1_cardetect
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*
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* Description:
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* Card detect interrupt handlers
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*
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****************************************************************************/
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static int sam_hsmci_cardetect(struct sam_hsmci_state_s *state)
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{
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/* Get the current card insertion state */
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bool cd = sam_cardinserted_internal(state);
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/* Has the card detect state changed? */
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if (cd != state->cd)
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{
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/* Yes... remember that new state and inform the HSMCI driver */
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state->cd = cd;
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/* Report the new state to the SDIO driver */
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sdio_mediachange(state->hsmci, cd);
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}
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return OK;
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}
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#ifdef CONFIG_SAMV7_HSMCI0
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static int sam_hsmci0_cardetect(int irq, void *regs, FAR void *arg)
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{
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int ret;
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/* Handle the card detect interrupt. The interrupt level logic will
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* kick of the driver-level operations to initialize the MMC/SD block
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* device.
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*/
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ret = sam_hsmci_cardetect(&g_hsmci0);
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#ifdef CONFIG_SAMV71XULT_HSMCI0_AUTOMOUNT
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/* Let the automounter know about the insertion event */
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sam_automount_event(HSMCI0_SLOTNO, sam_cardinserted(HSMCI0_SLOTNO));
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#endif
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return ret;
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}
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#endif
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/****************************************************************************
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* Name: sam_hsmci_state
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*
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* Description:
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* Initialize HSMCI GPIOs.
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*
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****************************************************************************/
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static inline struct sam_hsmci_state_s *sam_hsmci_state(int slotno)
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{
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struct sam_hsmci_state_s *state = NULL;
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#ifdef CONFIG_SAMV7_HSMCI0
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state = &g_hsmci0;
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#endif
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return state;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_hsmci_initialize
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*
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* Description:
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* Perform architecture specific initialization
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*
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****************************************************************************/
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int sam_hsmci_initialize(int slotno, int minor)
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{
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struct sam_hsmci_state_s *state;
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int ret;
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/* Get the static HSMCI description */
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state = sam_hsmci_state(slotno);
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if (!state)
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{
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mcerr("ERROR: No state for slotno %d\n", slotno);
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return -EINVAL;
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}
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/* Initialize card-detect, write-protect, and power enable GPIOs */
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sam_configgpio(state->cdcfg);
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sam_dumpgpio(state->cdcfg, "HSMCI Card Detect");
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if (state->pwrcfg != 0)
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{
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sam_configgpio(state->pwrcfg);
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sam_dumpgpio(state->pwrcfg, "HSMCI Power");
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}
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/* Mount the SDIO-based MMC/SD block driver */
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/* First, get an instance of the SDIO interface */
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state->hsmci = sdio_initialize(slotno);
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if (!state->hsmci)
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{
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mcerr("ERROR: Failed to initialize SDIO slot %d\n", slotno);
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return -ENODEV;
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}
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/* Now bind the SDIO interface to the MMC/SD driver */
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ret = mmcsd_slotinitialize(minor, state->hsmci);
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if (ret != OK)
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{
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mcerr("ERROR: Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
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return ret;
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}
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/* Configure card detect interrupts */
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sam_gpioirq(state->cdcfg);
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(void)irq_attach(state->irq, state->handler, NULL);
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/* Then inform the HSMCI driver if there is or is not a card in the slot. */
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state->cd = sam_cardinserted_internal(state);
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sdio_mediachange(state->hsmci, state->cd);
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/* Enable card detect interrupts */
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sam_gpioirqenable(state->irq);
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return OK;
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}
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/****************************************************************************
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* Name: sam_cardinserted
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*
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* Description:
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* Check if a card is inserted into the selected HSMCI slot
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*
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****************************************************************************/
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bool sam_cardinserted(int slotno)
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{
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struct sam_hsmci_state_s *state;
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/* Get the HSMI description */
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state = sam_hsmci_state(slotno);
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if (!state)
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{
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mcerr("ERROR: No state for slotno %d\n", slotno);
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return false;
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}
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/* Return the state of the GPIO pin */
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return sam_cardinserted_internal(state);
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}
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/****************************************************************************
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* Name: sam_writeprotected
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*
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* Description:
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* Check if a card is inserted into the selected HSMCI slot
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*
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****************************************************************************/
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bool sam_writeprotected(int slotno)
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{
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/* There are no write protect pins */
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return false;
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}
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#endif /* HAVE_HSMCI */
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