40cd67eee6
Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
331 lines
8.5 KiB
C
331 lines
8.5 KiB
C
/****************************************************************************
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* boards/arm/sama5/sama5d3x-ek/src/sam_hsmci.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* The SAMA5D3x-EK provides a two SD memory card slots:
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* (1) a full size SD card slot (J7 labeled MCI0), and
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* (2) a microSD memory card slot (J6 labeled MCI1).
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*
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* The full size SD card slot connects via HSMCI0.
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* The card detect discrete is available on PB17 (pulled high).
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* The write protect descrete is tied to ground (via PP6) and not available
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* to software.
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* The slot supports 8-bit wide transfer mode, but the NuttX driver
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* currently uses only the 4-bit wide transfer mode
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*
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* PD17 MCI0_CD
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* PD1 MCI0_DA0
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* PD2 MCI0_DA1
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* PD3 MCI0_DA2
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* PD4 MCI0_DA3
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* PD5 MCI0_DA4
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* PD6 MCI0_DA5
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* PD7 MCI0_DA6
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* PD8 MCI0_DA7
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* PD9 MCI0_CK
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* PD0 MCI0_CDA
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*
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* The microSD connects vi HSMCI1.
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* The card detect discrete is available on PB18 (pulled high):
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*
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* PD18 MCI1_CD
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* PB20 MCI1_DA0
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* PB21 MCI1_DA1
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* PB22 MCI1_DA2
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* PB23 MCI1_DA3
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* PB24 MCI1_CK
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* PB19 MCI1_CDA
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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_pio.h"
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#include "sam_hsmci.h"
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#include "sama5d3x-ek.h"
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#ifdef HAVE_HSMCI
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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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pio_pinset_t pincfg; /* Card detect PIO 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_SAMA5_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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.pincfg = PIO_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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#ifdef CONFIG_SAMA5_HSMCI1
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static int sam_hsmci1_cardetect(int irq, void *regs, FAR void *arg);
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static struct sam_hsmci_state_s g_hsmci1 =
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{
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.pincfg = PIO_MCI1_CD,
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.irq = IRQ_MCI1_CD,
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.slotno = 1,
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.handler = sam_hsmci1_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 PIO pin */
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inserted = sam_pioread(state->pincfg);
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finfo("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_SAMA5_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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return sam_hsmci_cardetect(&g_hsmci0);
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}
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#endif
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#ifdef CONFIG_SAMA5_HSMCI1
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static int sam_hsmci1_cardetect(int irq, void *regs, FAR void *arg)
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{
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return sam_hsmci_cardetect(&g_hsmci1);
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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 PIOs.
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*
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****************************************************************************/
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static 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_SAMA5_HSMCI0
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#ifdef CONFIG_SAMA5_HSMCI1
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if (slotno == 0)
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#endif
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{
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state = &g_hsmci0;
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}
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#ifdef CONFIG_SAMA5_HSMCI1
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else
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#endif
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#endif
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#ifdef CONFIG_SAMA5_HSMCI1
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{
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state = &g_hsmci1;
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}
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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 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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ferr("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 and write-protect PIOs */
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sam_configpio(state->pincfg);
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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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ferr("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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ferr("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_pioirq(state->pincfg);
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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_pioirqenable(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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ferr("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 PIO 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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