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NXP Freedom K28F Board SD-Card support (#423)

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* Adds SDHC support for NXP Freedom-K28F
This commit is contained in:
johannes-nivus 2020-03-03 15:52:55 +01:00 committed by Gregory Nutt
parent e671a10b2a
commit a7d783d463
8 changed files with 895 additions and 73 deletions
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154
arch/arm/src/kinetis/kinetis_sdhc.c
View file

@ -1,35 +1,20 @@
/****************************************************************************
* arch/arm/src/kinetis/kinetis_sdhc.c
*
* Copyright (C) 2011-2012, 2014, 2016-2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
@ -174,6 +159,7 @@ struct kinetis_dev_s
struct sdio_dev_s dev; /* Standard, base SDIO interface */
/* Kinetis-specific extensions */
/* Event support */
sem_t waitsem; /* Implements event waiting */
@ -267,16 +253,18 @@ static void kinetis_showregs(struct kinetis_dev_s *priv, const char *msg);
/* Data Transfer Helpers ****************************************************/
static void kinetis_dataconfig(struct kinetis_dev_s *priv, bool bwrite,
unsigned int blocksize, unsigned int nblocks,
unsigned int timeout);
unsigned int blocksize, unsigned int nblocks,
unsigned int timeout);
static void kinetis_datadisable(void);
#ifndef CONFIG_KINETIS_SDHC_DMA
static void kinetis_transmit(struct kinetis_dev_s *priv);
static void kinetis_receive(struct kinetis_dev_s *priv);
#endif
static void kinetis_eventtimeout(int argc, uint32_t arg);
static void kinetis_endwait(struct kinetis_dev_s *priv, sdio_eventset_t wkupevent);
static void kinetis_endtransfer(struct kinetis_dev_s *priv, sdio_eventset_t wkupevent);
static void kinetis_endwait(struct kinetis_dev_s *priv,
sdio_eventset_t wkupevent);
static void kinetis_endtransfer(struct kinetis_dev_s *priv,
sdio_eventset_t wkupevent);
/* Interrupt Handling *******************************************************/
@ -307,12 +295,19 @@ static int kinetis_attach(FAR struct sdio_dev_s *dev);
static int kinetis_sendcmd(FAR struct sdio_dev_s *dev, uint32_t cmd,
uint32_t arg);
#ifdef CONFIG_SDIO_BLOCKSETUP
static void kinetis_blocksetup(FAR struct sdio_dev_s *dev,
unsigned int blocksize, unsigned int nblocks);
#endif
#ifndef CONFIG_KINETIS_SDHC_DMA
static int kinetis_recvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer,
size_t nbytes);
static int kinetis_sendsetup(FAR struct sdio_dev_s *dev,
FAR const uint8_t *buffer, uint32_t nbytes);
#endif
static int kinetis_cancel(FAR struct sdio_dev_s *dev);
static int kinetis_waitresponse(FAR struct sdio_dev_s *dev, uint32_t cmd);
@ -367,6 +362,9 @@ struct kinetis_dev_s g_sdhcdev =
.clock = kinetis_clock,
.attach = kinetis_attach,
.sendcmd = kinetis_sendcmd,
#ifdef CONFIG_SDIO_BLOCKSETUP
.blocksetup = kinetis_blocksetup,
#endif
#ifndef CONFIG_KINETIS_SDHC_DMA
.recvsetup = kinetis_recvsetup,
.sendsetup = kinetis_sendsetup,
@ -409,9 +407,6 @@ static struct kinetis_sdhcregs_s g_sampleregs[DEBUG_NSAMPLES];
* Private Functions
****************************************************************************/
/****************************************************************************
* Low-level Helpers
****************************************************************************/
/****************************************************************************
* Name: kinetis_takesem
*
@ -496,10 +491,6 @@ static void kinetis_configxfrints(struct kinetis_dev_s *priv, uint32_t xfrints)
leave_critical_section(flags);
}
/****************************************************************************
* DMA Helpers
****************************************************************************/
/****************************************************************************
* Name: kinetis_sampleinit
*
@ -615,9 +606,12 @@ static void kinetis_dumpsample(struct kinetis_dev_s *priv,
#ifdef CONFIG_SDIO_XFRDEBUG
static void kinetis_dumpsamples(struct kinetis_dev_s *priv)
{
kinetis_dumpsample(priv, &g_sampleregs[SAMPLENDX_BEFORE_SETUP], "Before setup");
kinetis_dumpsample(priv, &g_sampleregs[SAMPLENDX_AFTER_SETUP], "After setup");
kinetis_dumpsample(priv, &g_sampleregs[SAMPLENDX_END_TRANSFER], "End of transfer");
kinetis_dumpsample(priv, &g_sampleregs[SAMPLENDX_BEFORE_SETUP],
"Before setup");
kinetis_dumpsample(priv, &g_sampleregs[SAMPLENDX_AFTER_SETUP],
"After setup");
kinetis_dumpsample(priv, &g_sampleregs[SAMPLENDX_END_TRANSFER],
"End of transfer");
}
#endif
@ -639,10 +633,6 @@ static void kinetis_showregs(struct kinetis_dev_s *priv, const char *msg)
}
#endif
/****************************************************************************
* Data Transfer Helpers
****************************************************************************/
/****************************************************************************
* Name: kinetis_dataconfig
*
@ -970,7 +960,8 @@ static void kinetis_eventtimeout(int argc, uint32_t arg)
*
****************************************************************************/
static void kinetis_endwait(struct kinetis_dev_s *priv, sdio_eventset_t wkupevent)
static void kinetis_endwait(struct kinetis_dev_s *priv,
sdio_eventset_t wkupevent)
{
/* Cancel the watchdog timeout */
@ -1005,7 +996,8 @@ static void kinetis_endwait(struct kinetis_dev_s *priv, sdio_eventset_t wkupeven
*
****************************************************************************/
static void kinetis_endtransfer(struct kinetis_dev_s *priv, sdio_eventset_t wkupevent)
static void kinetis_endtransfer(struct kinetis_dev_s *priv,
sdio_eventset_t wkupevent)
{
#ifdef CONFIG_KINETIS_SDHC_DMA
uint32_t regval;
@ -1053,10 +1045,6 @@ static void kinetis_endtransfer(struct kinetis_dev_s *priv, sdio_eventset_t wkup
}
}
/****************************************************************************
* Interrupt Handling
****************************************************************************/
/****************************************************************************
* Name: kinetis_interrupt
*
@ -1143,7 +1131,8 @@ static int kinetis_interrupt(int irq, void *context, FAR void *arg)
{
/* Terminate the transfer with an error */
mcerr("ERROR: Data block CRC failure, remaining: %d\n", priv->remaining);
mcerr("ERROR: Data block CRC failure, remaining: %d\n",
priv->remaining);
kinetis_endtransfer(priv, SDIOWAIT_TRANSFERDONE | SDIOWAIT_ERROR);
}
@ -1191,16 +1180,12 @@ static int kinetis_interrupt(int irq, void *context, FAR void *arg)
return OK;
}
/****************************************************************************
* SDIO Interface Methods
****************************************************************************/
/****************************************************************************
* Name: kinetis_lock
*
* Description:
* Locks the bus. Function calls low-level multiplexed bus routines to
* resolve bus requests and acknowledgement issues.
* resolve bus requests and acknowledgment issues.
*
* Input Parameters:
* dev - An instance of the SDIO device interface
@ -1379,6 +1364,7 @@ static void kinetis_widebus(FAR struct sdio_dev_s *dev, bool wide)
{
regval |= SDHC_PROCTL_DTW_1BIT;
}
putreg32(regval, KINETIS_SDHC_PROCTL);
}
@ -1690,7 +1676,6 @@ static int kinetis_attach(FAR struct sdio_dev_s *dev)
ret = irq_attach(KINETIS_IRQ_SDHC, kinetis_interrupt, NULL);
if (ret == OK)
{
/* Disable all interrupts at the SDIO controller and clear all pending
* interrupts.
*/
@ -1870,6 +1855,40 @@ static int kinetis_sendcmd(FAR struct sdio_dev_s *dev, uint32_t cmd,
return OK;
}
/****************************************************************************
* Name: kinetis_blocksetup
*
* Description:
* Configure block size and the number of blocks for next transfer
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* blocksize - The selected block size.
* nblocklen - The number of blocks to transfer
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SDIO_BLOCKSETUP
static void kinetis_blocksetup(FAR struct sdio_dev_s *dev,
unsigned int blocksize,
unsigned int nblocks)
{
uint32_t regval;
mcinfo("blocksize=%ld, total transfer=%ld (%ld blocks)\n", blocksize,
blocksize * nblocks, nblocks);
/* Configure block size for next transfer */
regval = blocksize << SDHC_BLKATTR_SIZE_SHIFT |
nblocks << SDHC_BLKATTR_CNT_SHIFT;
putreg32(regval, KINETIS_SDHC_BLKATTR);
}
#endif
/****************************************************************************
* Name: kinetis_recvsetup
*
@ -1943,8 +1962,8 @@ static int kinetis_recvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer,
****************************************************************************/
#ifndef CONFIG_KINETIS_SDHC_DMA
static int kinetis_sendsetup(FAR struct sdio_dev_s *dev, FAR const uint8_t *buffer,
size_t nbytes)
static int kinetis_sendsetup(FAR struct sdio_dev_s *dev,
FAR const uint8_t *buffer, size_t nbytes)
{
struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev;
@ -2170,7 +2189,6 @@ static int kinetis_recvshortcrc(FAR struct sdio_dev_s *dev, uint32_t cmd,
* 0 1 End bit
*/
#ifdef CONFIG_DEBUG_FEATURES
if (!rshort)
{
@ -2331,7 +2349,8 @@ static int kinetis_recvshort(FAR struct sdio_dev_s *dev, uint32_t cmd,
/* MMC responses not supported */
static int kinetis_recvnotimpl(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rnotimpl)
static int kinetis_recvnotimpl(FAR struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rnotimpl)
{
/* Just return an error */
@ -2684,9 +2703,6 @@ static int kinetis_dmasendsetup(FAR struct sdio_dev_s *dev,
}
#endif
/****************************************************************************
* Initialization/uninitialization/reset
****************************************************************************/
/****************************************************************************
* Name: kinetis_callback
*
@ -2752,8 +2768,10 @@ static void kinetis_callback(void *arg)
{
/* Yes.. queue it */
mcinfo("Queuing callback to %p(%p)\n", priv->callback, priv->cbarg);
work_queue(HPWORK, &priv->cbwork, (worker_t)priv->callback, priv->cbarg, 0);
mcinfo("Queuing callback to %p(%p)\n",
priv->callback, priv->cbarg);
work_queue(HPWORK, &priv->cbwork, (worker_t)priv->callback,
priv->cbarg, 0);
}
else
{
@ -2793,6 +2811,7 @@ FAR struct sdio_dev_s *sdhc_initialize(int slotno)
DEBUGASSERT(slotno == 0);
/* Initialize the SDHC slot structure data structure */
/* Initialize semaphores */
nxsem_init(&priv->waitsem, 0, 0);
@ -2833,7 +2852,6 @@ FAR struct sdio_dev_s *sdhc_initialize(int slotno)
putreg32(regval, KINETIS_SIM_SCGC3);
mcinfo("SIM_SCGC3: %08x\n", regval);
/* Configure pins for 1 or 4-bit, wide-bus operation (the chip is capable
* of 8-bit wide bus operation but D4-D7 are not configured).
*

30
boards/arm/kinetis/freedom-k28f/Kconfig
View file

@ -5,4 +5,32 @@
if ARCH_BOARD_FREEDOM_K28F
endif
config FRDMK28F_SDHC_AUTOMOUNT
bool "SDHC automounter"
default n
depends on FS_AUTOMOUNTER && KINETIS_SDHC
if FRDMK28F_SDHC_AUTOMOUNT
config FRDMK28F_SDHC_AUTOMOUNT_FSTYPE
string "SDHC file system type"
default "vfat"
config FRDMK28F_SDHC_AUTOMOUNT_BLKDEV
string "SDHC block device"
default "/dev/mmcsd0"
config FRDMK28F_SDHC_AUTOMOUNT_MOUNTPOINT
string "SDHC mount point"
default "/mnt/sdcard"
config FRDMK28F_SDHC_AUTOMOUNT_DDELAY
int "SDHC debounce delay (milliseconds)"
default 1000
config FRDMK28F_SDHC_AUTOMOUNT_UDELAY
int "SDHC unmount retry delay (milliseconds)"
default 2000
endif # FRDMK28F_SDHC_AUTOMOUNT
endif # ARCH_BOARD_FREEDOM_K28F

11
boards/arm/kinetis/freedom-k28f/include/board.h
View file

@ -415,6 +415,17 @@
#endif
#endif
/* SDHC */
#ifdef CONFIG_KINETIS_SDHC
# define PIN_SDHC0_CMD PIN_SDHC0_CMD_1
# define PIN_SDHC0_D0 PIN_SDHC0_D0_1
# define PIN_SDHC0_D1 PIN_SDHC0_D1_1
# define PIN_SDHC0_D2 PIN_SDHC0_D2_1
# define PIN_SDHC0_D3 PIN_SDHC0_D3_1
# define PIN_SDHC0_DCLK PIN_SDHC0_DCLK_1
#endif
/* LED definitions **********************************************************/
/* The Freedom K28F has a single RGB LED driven by the K28F as follows:

7
boards/arm/kinetis/freedom-k28f/src/Makefile
View file

@ -52,6 +52,13 @@ CSRCS += k28_userleds.c
endif
endif
ifeq ($(CONFIG_KINETIS_SDHC),y)
CSRCS += k28_sdhc.c
ifeq ($(CONFIG_FS_AUTOMOUNTER),y)
CSRCS += k28_automount.c
endif
endif
ifeq ($(CONFIG_PWM),y)
CSRCS += k28_pwm.c
endif

179
boards/arm/kinetis/freedom-k28f/src/freedom-k28f.h
View file

@ -47,8 +47,95 @@
* Pre-processor Definitions
****************************************************************************/
/* Application Configuration ************************************************/
/* Assume we have everything */
#define HAVE_MMCSD 1
#define HAVE_AUTOMOUNTER 1
/* SD card support */
#define MMCSD_SLOTNO 0
/* Can't support MMC/SD features if mountpoints are disabled or if SDHC
* support is not enabled.
*/
#if defined(CONFIG_DISABLE_MOUNTPOINT) || !defined(CONFIG_KINETIS_SDHC)
# undef HAVE_MMCSD
#endif
#ifdef HAVE_MMCSD
# if defined(CONFIG_NSH_MMCSDSLOTNO) && CONFIG_NSH_MMCSDSLOTNO != 0
# error Only one MMC/SD slot, slot 0
# endif
# ifdef CONFIG_NSH_MMCSDMINOR
# define MMSCD_MINOR CONFIG_NSH_MMCSDMINOR
# else
# define MMSCD_MINOR 0
# endif
/* We expect to receive GPIO interrupts for card insertion events */
# ifndef CONFIG_KINETIS_GPIOIRQ
# error "CONFIG_KINETIS_GPIOIRQ required for card detect interrupt"
# endif
# ifndef CONFIG_KINETIS_PORTBINTS
# error "CONFIG_KINETIS_PORTBINTS required for card detect interrupt"
# endif
#endif
/* Automounter */
#if !defined(CONFIG_FS_AUTOMOUNTER) || !defined(HAVE_MMCSD)
# undef HAVE_AUTOMOUNTER
# undef CONFIG_FRDMK28F_SDHC_AUTOMOUNT
#endif
#ifndef CONFIG_FRDMK28F_SDHC_AUTOMOUNT
# undef HAVE_AUTOMOUNTER
#endif
/* Automounter defaults */
#ifdef HAVE_AUTOMOUNTER
# ifndef CONFIG_FRDMK28F_SDHC_AUTOMOUNT_FSTYPE
# define CONFIG_FRDMK28F_SDHC_AUTOMOUNT_FSTYPE "vfat"
# endif
# ifndef CONFIG_FRDMK28F_SDHC_AUTOMOUNT_BLKDEV
# define CONFIG_FRDMK28F_SDHC_AUTOMOUNT_BLKDEV "/dev/mmcds0"
# endif
# ifndef CONFIG_FRDMK28F_SDHC_AUTOMOUNT_MOUNTPOINT
# define CONFIG_FRDMK28F_SDHC_AUTOMOUNT_MOUNTPOINT "/mnt/sdcard"
# endif
# ifndef CONFIG_FRDMK28F_SDHC_AUTOMOUNT_DDELAY
# define CONFIG_FRDMK28F_SDHC_AUTOMOUNT_DDELAY 1000
# endif
# ifndef CONFIG_FRDMK28F_SDHC_AUTOMOUNT_UDELAY
# define CONFIG_FRDMK28F_SDHC_AUTOMOUNT_UDELAY 2000
# endif
#endif /* HAVE_AUTOMOUNTER */
/* Freedom-K28F GPIOs *******************************************************/
/* A micro Secure Digital (SD) card slot is available on the FRDM-K28F
* connected to the SD Host Controller (SDHC) signals of the MCU.
* This slot will accept micro format SD memory cards.
* The SD card detect pin (PTB5) is an open switch that shorts with VDD when
* card is inserted.
*/
#define GPIO_SD_CARDDETECT (GPIO_INPUT | PIN_INT_BOTH | PIN_PORTB | PIN5)
/* An RGB LED is connected through GPIO as shown below:
*
* LED K28
@ -90,14 +177,14 @@
struct i2c_master_s; /* Forward reference */
#ifdef CONFIG_KINETIS_I2C0
extern FAR struct i2c_master_s* g_i2c0_dev;
extern FAR struct i2c_master_s *g_i2c0_dev;
#endif
#ifdef CONFIG_KINETIS_I2C1
extern FAR struct i2c_master_s* g_i2c1_dev;
extern FAR struct i2c_master_s *g_i2c1_dev;
#endif
/****************************************************************************
* Public Functions
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
@ -133,7 +220,7 @@ void weak_function k28_spidev_initialize(void);
* Description:
* Called to configure I2C
*
*****************************************************************************/
****************************************************************************/
void k28_i2cdev_initialize(void);
@ -147,6 +234,90 @@ void k28_i2cdev_initialize(void);
extern void weak_function k28_usbdev_initialize(void);
/****************************************************************************
* Name: k28_sdhc_initialize
*
* Description:
* Inititialize the SDHC SD card slot
*
****************************************************************************/
#ifdef HAVE_MMCSD
int k28_sdhc_initialize(void);
#else
# define k28_sdhc_initialize() (OK)
#endif
/****************************************************************************
* Name: k28_cardinserted
*
* Description:
* Check if a card is inserted into the SDHC slot
*
****************************************************************************/
#ifdef HAVE_AUTOMOUNTER
bool k28_cardinserted(void);
#else
# define k28_cardinserted() (false)
#endif
/****************************************************************************
* Name: k28_writeprotected
*
* Description:
* Check if the card in the MMC/SD slot is write protected
*
****************************************************************************/
#ifdef HAVE_AUTOMOUNTER
bool k28_writeprotected(void);
#else
# define k28_writeprotected() (false)
#endif
/****************************************************************************
* Name: k28_automount_initialize
*
* Description:
* Configure auto-mounter for the configured SDHC slot
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef HAVE_AUTOMOUNTER
void k28_automount_initialize(void);
#endif
/****************************************************************************
* Name: k28_automount_event
*
* Description:
* The SDHC card detection logic has detected an insertion or removal event.
* It has already scheduled the MMC/SD block driver operations.
* Now we need to schedule the auto-mount event which will occur with a
* substantial delay to make sure that everything has settle down.
*
* Input Parameters:
* inserted - True if the card is inserted in the slot. False otherwise.
*
* Returned Value:
* None
*
* Assumptions:
* Interrupts are disabled.
*
****************************************************************************/
#ifdef HAVE_AUTOMOUNTER
void k28_automount_event(bool inserted);
#endif
/****************************************************************************
* Name: k28_pwm_setup
*

310
boards/arm/kinetis/freedom-k28f/src/k28_automount.c Normal file
View file

@ -0,0 +1,310 @@
/****************************************************************************
* boards/arm/kinetis/freedom-k28f/src/k28_automount.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#if defined(CONFIG_FS_AUTOMOUNTER_DEBUG) && !defined(CONFIG_DEBUG_FS)
# define CONFIG_DEBUG_FS 1
#endif
#include <debug.h>
#include <nuttx/irq.h>
#include <nuttx/clock.h>
#include <nuttx/fs/automount.h>
#include "freedom-k28f.h"
#ifdef HAVE_AUTOMOUNTER
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef NULL
# define NULL (FAR void *)0
#endif
#ifndef OK
# define OK 0
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure represents the changeable state of the automounter */
struct k28_automount_state_s
{
volatile automount_handler_t handler; /* Upper half handler */
FAR void *arg; /* Handler argument */
bool enable; /* Fake interrupt enable */
bool pending; /* Set if there an event while disabled */
};
/* This structure represents the static configuration of an automounter */
struct k28_automount_config_s
{
/* This must be first thing in structure so that we can simply cast from
* struct automount_lower_s to struct k28_automount_config_s
*/
struct automount_lower_s lower; /* Publicly visible part */
FAR struct k28_automount_state_s *state; /* Changeable state */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int k28_attach(FAR const struct automount_lower_s *lower,
automount_handler_t isr, FAR void *arg);
static void k28_enable(FAR const struct automount_lower_s *lower,
bool enable);
static bool k28_inserted(FAR const struct automount_lower_s *lower);
/****************************************************************************
* Private Data
****************************************************************************/
static struct k28_automount_state_s g_sdhc_state;
static const struct k28_automount_config_s g_sdhc_config =
{
.lower =
{
.fstype = CONFIG_FRDMK28F_SDHC_AUTOMOUNT_FSTYPE,
.blockdev = CONFIG_FRDMK28F_SDHC_AUTOMOUNT_BLKDEV,
.mountpoint = CONFIG_FRDMK28F_SDHC_AUTOMOUNT_MOUNTPOINT,
.ddelay = MSEC2TICK(CONFIG_FRDMK28F_SDHC_AUTOMOUNT_DDELAY),
.udelay = MSEC2TICK(CONFIG_FRDMK28F_SDHC_AUTOMOUNT_UDELAY),
.attach = k28_attach,
.enable = k28_enable,
.inserted = k28_inserted
},
.state = &g_sdhc_state
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: k28_attach
*
* Description:
* Attach a new SDHC event handler
*
* Input Parameters:
* lower - An instance of the auto-mounter lower half state structure
* isr - The new event handler to be attach
* arg - Client data to be provided when the event handler is invoked.
*
* Returned Value:
* Always returns OK
*
****************************************************************************/
static int k28_attach(FAR const struct automount_lower_s *lower,
automount_handler_t isr, FAR void *arg)
{
FAR const struct k28_automount_config_s *config;
FAR struct k28_automount_state_s *state;
/* Recover references to our structure */
config = (FAR struct k28_automount_config_s *)lower;
DEBUGASSERT(config != NULL && config->state != NULL);
state = config->state;
/* Save the new handler info (clearing the handler first to eliminate race
* conditions).
*/
state->handler = NULL;
state->pending = false;
state->arg = arg;
state->handler = isr;
return OK;
}
/****************************************************************************
* Name: k28_enable
*
* Description:
* Enable card insertion/removal event detection
*
* Input Parameters:
* lower - An instance of the auto-mounter lower half state structure
* enable - True: enable event detection; False: disable
*
* Returned Value:
* None
*
****************************************************************************/
static void k28_enable(FAR const struct automount_lower_s *lower,
bool enable)
{
FAR const struct k28_automount_config_s *config;
FAR struct k28_automount_state_s *state;
irqstate_t flags;
/* Recover references to our structure */
config = (FAR struct k28_automount_config_s *)lower;
DEBUGASSERT(config != NULL && config->state != NULL);
state = config->state;
/* Save the fake enable setting */
flags = enter_critical_section();
state->enable = enable;
/* Did an interrupt occur while interrupts were disabled? */
if (enable && state->pending)
{
/* Yes.. perform the fake interrupt if the interrutp is attached */
if (state->handler)
{
bool inserted = k28_cardinserted();
state->handler(&config->lower, state->arg, inserted);
}
state->pending = false;
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: k28_inserted
*
* Description:
* Check if a card is inserted into the slot.
*
* Input Parameters:
* lower - An instance of the auto-mounter lower half state structure
*
* Returned Value:
* True if the card is inserted; False otherwise
*
****************************************************************************/
static bool k28_inserted(FAR const struct automount_lower_s *lower)
{
return k28_cardinserted();
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: k28_automount_initialize
*
* Description:
* Configure auto-mounters for each enable and so configured SDHC
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
void k28_automount_initialize(void)
{
FAR void *handle;
finfo("Initializing automounter(s)\n");
/* Initialize the SDHC0 auto-mounter */
handle = automount_initialize(&g_sdhc_config.lower);
if (!handle)
{
ferr("ERROR: Failed to initialize auto-mounter for SDHC0\n");
}
}
/****************************************************************************
* Name: k28_automount_event
*
* Description:
* The SDHC card detection logic has detected an insertion or removal event.
* It has already scheduled the MMC/SD block driver operations.
* Now we need to schedule the auto-mount event which will occur with a
* substantial delay to make sure that everything has settle down.
*
* Input Parameters:
* slotno - Identifies the SDHC0 slot: SDHC0_SLOTNO or SDHC1_SLOTNO.
* There is a terminology problem here: Each SDHC supports two slots,
* slot A and slot B. Only slot A is used.
* So this is not a really a slot, but an HSCMI peripheral number.
* inserted - True if the card is inserted in the slot. False otherwise.
*
* Returned Value:
* None
*
* Assumptions:
* Interrupts are disabled.
*
****************************************************************************/
void k28_automount_event(bool inserted)
{
FAR const struct k28_automount_config_s *config = &g_sdhc_config;
FAR struct k28_automount_state_s *state = &g_sdhc_state;
/* Is the auto-mounter interrupt attached? */
if (state->handler)
{
/* Yes.. Have we been asked to hold off interrupts? */
if (!state->enable)
{
/* Yes.. just remember that there is a pending interrupt. We will
* deliver the interrupt when interrupts are "re-enabled."
*/
state->pending = true;
}
else
{
/* No.. forward the event to the handler */
state->handler(&config->lower, state->arg, inserted);
}
}
}
#endif /* HAVE_AUTOMOUNTER */

37
boards/arm/kinetis/freedom-k28f/src/k28_bringup.c
View file

@ -45,6 +45,8 @@
#include <debug.h>
#include <errno.h>
#include "freedom-k28f.h"
/****************************************************************************
* Public Functions
****************************************************************************/
@ -93,6 +95,41 @@ int k28_bringup(void)
k28_i2cdev_initialize();
#endif
#ifdef HAVE_MMCSD
/* Initialize the SDHC driver */
ret = k28_sdhc_initialize();
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: k28_sdhc_initialize() failed: %d\n", ret);
}
#ifdef CONFIG_FRDMK28F_SDHC_MOUNT
else
{
/* Mount the volume on HSMCI0 */
ret = mount(CONFIG_FRDMK28F_SDHC_MOUNT_BLKDEV,
CONFIG_FRDMK28F_SDHC_MOUNT_MOUNTPOINT,
CONFIG_FRDMK28F_SDHC_MOUNT_FSTYPE,
0, NULL);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: Failed to mount %s: %d\n",
CONFIG_FRDMK28F_SDHC_MOUNT_MOUNTPOINT, errno);
}
}
#endif /* CONFIG_FRDMK28F_SDHC_MOUNT */
#endif /* HAVE_MMCSD */
#ifdef HAVE_AUTOMOUNTER
/* Initialize the auto-mounter */
k28_automount_initialize();
#endif
UNUSED(ret);
return OK;
}

240
boards/arm/kinetis/freedom-k28f/src/k28_sdhc.c Normal file
View file

@ -0,0 +1,240 @@
/****************************************************************************
* boards/arm/kinetis/freedom-k28f/src/k28_sdhc.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/* A micro Secure Digital (SD) card slot is available on the FRDM-K64F
* connected to the SD Host Controller (SDHC) signals of the MCU.
* This slot will accept micro format SD memory cards.
* The SD card detect pin (PTB5) is an open switch that shorts with VDD when
* card is inserted.
*
* ------------ ------------- --------
* SD Card Slot Board Signal K64F Pin
* ------------ ------------- --------
* DAT0 SDHC0_D0 PTA25
* DAT1 SDHC0_D1 PTA24
* DAT2 SDHC0_D2 PTA29
* CD/DAT3 SDHC0_D3 PTA28
* CMD SDHC0_CMD PTA27
* CLK SDHC0_DCLK PTA26
* SWITCH D_CARD_DETECT PTB5
* ------------ ------------- --------
*
* There is no Write Protect pin available to the K28F.
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <debug.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/sdio.h>
#include <nuttx/mmcsd.h>
#include "kinetis.h"
#include "freedom-k28f.h"
#ifdef HAVE_MMCSD
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure holds static information unique to one SDHC peripheral */
struct k28_sdhc_state_s
{
struct sdio_dev_s *sdhc; /* R/W device handle */
bool inserted; /* TRUE: card is inserted */
};
/****************************************************************************
* Private Data
****************************************************************************/
/* HSCMI device state */
static struct k28_sdhc_state_s g_sdhc;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: k28_mediachange
****************************************************************************/
static void k28_mediachange(void)
{
bool inserted;
/* Get the current value of the card detect pin. This pin is pulled up on
* board. So low means that a card is present.
*/
inserted = kinetis_gpioread(GPIO_SD_CARDDETECT);
mcinfo("inserted: %s\n", inserted ? "Yes" : "No");
/* Has the pin changed state? */
if (inserted != g_sdhc.inserted)
{
mcinfo("Media change: %d->%d\n", g_sdhc.inserted, inserted);
/* Yes.. perform the appropriate action (this might need some debounce). */
g_sdhc.inserted = inserted;
sdhc_mediachange(g_sdhc.sdhc, inserted);
#ifdef CONFIG_FRDMK28F_SDHC_AUTOMOUNT
/* Let the automounter know about the insertion event */
k28_automount_event(k28_cardinserted());
#endif
}
}
/****************************************************************************
* Name: k28_cdinterrupt
****************************************************************************/
static int k28_cdinterrupt(int irq, FAR void *context, FAR void *arg)
{
/* All of the work is done by k28_mediachange() */
k28_mediachange();
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: k28_sdhc_initialize
*
* Description:
* Inititialize the SDHC SD card slot
*
****************************************************************************/
int k28_sdhc_initialize(void)
{
int ret;
/* Configure GPIO pins */
kinetis_pinconfig(GPIO_SD_CARDDETECT);
/* Attached the card detect interrupt (but don't enable it yet) */
kinetis_pinirqattach(GPIO_SD_CARDDETECT, k28_cdinterrupt, NULL);
/* Configure the write protect GPIO -- None */
/* Mount the SDHC-based MMC/SD block driver */
/* First, get an instance of the SDHC interface */
mcinfo("Initializing SDHC slot %d\n", MMCSD_SLOTNO);
g_sdhc.sdhc = sdhc_initialize(MMCSD_SLOTNO);
if (!g_sdhc.sdhc)
{
mcerr("ERROR: Failed to initialize SDHC slot %d\n", MMCSD_SLOTNO);
return -ENODEV;
}
/* Now bind the SDHC interface to the MMC/SD driver */
mcinfo("Bind SDHC to the MMC/SD driver, minor=%d\n", MMSCD_MINOR);
ret = mmcsd_slotinitialize(MMSCD_MINOR, g_sdhc.sdhc);
if (ret != OK)
{
syslog(LOG_ERR, "ERROR: Failed to bind SDHC to the MMC/SD driver: %d\n",
ret);
return ret;
}
syslog(LOG_INFO, "Successfully bound SDHC to the MMC/SD driver\n");
/* Handle the initial card state */
k28_mediachange();
/* Enable CD interrupts to handle subsequent media changes */
kinetis_pinirqenable(GPIO_SD_CARDDETECT);
return OK;
}
/****************************************************************************
* Name: k28_cardinserted
*
* Description:
* Check if a card is inserted into the SDHC slot
*
****************************************************************************/
#ifdef HAVE_AUTOMOUNTER
bool k28_cardinserted(void)
{
bool inserted;
/* Get the current value of the card detect pin. This pin is pulled up on
* board. So low means that a card is present.
*/
inserted = kinetis_gpioread(GPIO_SD_CARDDETECT);
mcinfo("inserted: %s\n", inserted ? "Yes" : "No");
return inserted;
}
#endif
/****************************************************************************
* Name: k28_writeprotected
*
* Description:
* Check if a card is inserted into the SDHC slot
*
****************************************************************************/
#ifdef HAVE_AUTOMOUNTER
bool k28_writeprotected(void)
{
/* There are no write protect pins */
return false;
}
#endif
#endif /* HAVE_MMCSD */