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apache / nuttx / refs/heads/master / . / arch / arm / src / lpc54xx / lpc54_sdmmc.c
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/****************************************************************************
* arch/arm/src/lpc54xx/lpc54_sdmmc.c
*
* SPDX-License-Identifier: Apache-2.0
*
* 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>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/wdog.h>
#include <nuttx/clock.h>
#include <nuttx/arch.h>
#include <nuttx/sdio.h>
#include <nuttx/wqueue.h>
#include <nuttx/semaphore.h>
#include <nuttx/mmcsd.h>
#include <nuttx/irq.h>
#include "arm_internal.h"
#include "hardware/lpc54_pinmux.h"
#include "hardware/lpc54_syscon.h"
#include "lpc54_enableclk.h"
#include "lpc54_gpio.h"
#include "lpc54_sdmmc.h"
#include <arch/board/board.h>
#ifdef CONFIG_LPC54_SDMMC
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define MCI_DMADES0_OWN (1UL << 31)
#define MCI_DMADES0_CH (1 << 4)
#define MCI_DMADES0_FS (1 << 3)
#define MCI_DMADES0_LD (1 << 2)
#define MCI_DMADES0_DIC (1 << 1)
#define MCI_DMADES1_MAXTR 4096
#define MCI_DMADES1_BS1(x) (x)
/* Configuration ************************************************************/
/* Required system configuration options in the sched/Kconfig:
*
* CONFIG_SCHED_WORKQUEUE -- Callback support requires work queue support.
*
* Driver-specific configuration options in the drivers/mmcd Kdonfig:
*
* CONFIG_SDIO_MUXBUS - Setting this configuration enables some locking
* APIs to manage concurrent accesses on the SD card bus. This is not
* needed for the simple case of a single SD card slot, for example.
* CONFIG_SDIO_WIDTH_D1_ONLY - This may be selected to force the driver
* operate with only a single data line (the default is to use all
* 4 SD data lines).
* CONFIG_MMCSD_HAVE_CARDDETECT - Select if the SD slot supports a card
* detect pin.
* CONFIG_MMCSD_HAVE_WRITEPROTECT - Select if the SD slots supports a
* write protected pin.
*
* Driver-specific configuration options in the arch/arm/src/lpc54xx/Kconfig
*
* CONFIG_LPC54_SDMMC_PWRCTRL - Select if the board supports an output
* pin to enable power to the SD slot.
* CONFIG_LPC54_SDMMC_DMA - Enable SD card DMA. This is a marginally
* optional. For most usages, SD accesses will cause data overruns if
* used without DMA. This will also select CONFIG_SDIO_DMA.
* CONFIG_LPC54_SDMMC_REGDEBUG - Enables some very low-level debug output
* This also requires CONFIG_DEBUG_MEMCARD_INFO
*/
#ifndef CONFIG_SCHED_WORKQUEUE
# error "Callback support requires CONFIG_SCHED_WORKQUEUE"
#endif
#ifndef CONFIG_SDIO_BLOCKSETUP
# error "Driver requires CONFIG_SDIO_BLOCKSETUP to be set"
#endif
/* Timing : 100mS short timeout, 2 seconds for long one */
#define SDCARD_CMDTIMEOUT MSEC2TICK(100)
#define SDCARD_LONGTIMEOUT MSEC2TICK(2000)
/* Type of Card Bus Size */
#define SDCARD_BUS_D1 0
#define SDCARD_BUS_D4 1
#define SDCARD_BUS_D8 0x100
/* FIFO size in bytes */
#define LPC54_TXFIFO_SIZE (LPC54_TXFIFO_DEPTH | LPC54_TXFIFO_WIDTH)
#define LPC54_RXFIFO_SIZE (LPC54_RXFIFO_DEPTH | LPC54_RXFIFO_WIDTH)
/* Number of DMA Descriptors */
#define NUM_DMA_DESCRIPTORS (1 + (0x10000 / MCI_DMADES1_MAXTR))
/* Data transfer interrupt mask bits */
#define SDCARD_RECV_MASK (SDMMC_INT_DTO | SDMMC_INT_DCRC | SDMMC_INT_DRTO | \
SDMMC_INT_EBE | SDMMC_INT_RXDR | SDMMC_INT_SBE)
#define SDCARD_SEND_MASK (SDMMC_INT_DTO | SDMMC_INT_DCRC | SDMMC_INT_DRTO | \
SDMMC_INT_EBE | SDMMC_INT_TXDR | SDMMC_INT_SBE)
#define SDCARD_DMARECV_MASK (SDMMC_INT_DTO | SDMMC_INT_DCRC | SDMMC_INT_DRTO | \
SDMMC_INT_SBE | SDMMC_INT_EBE)
#define SDCARD_DMASEND_MASK (SDMMC_INT_DTO | SDMMC_INT_DCRC | SDMMC_INT_DRTO | \
SDMMC_INT_EBE)
#define SDCARD_DMAERROR_MASK (SDMMC_IDINTEN_FBE | SDMMC_IDINTEN_DU | \
SDMMC_IDINTEN_AIS)
#define SDCARD_TRANSFER_ALL (SDMMC_INT_DTO | SDMMC_INT_DCRC | SDMMC_INT_DRTO | \
SDMMC_INT_EBE | SDMMC_INT_TXDR | SDMMC_INT_RXDR | \
SDMMC_INT_SBE)
/* Event waiting interrupt mask bits */
#define SDCARD_INT_RESPERR (SDMMC_INT_RE | SDMMC_INT_RCRC | SDMMC_INT_RTO)
#ifdef CONFIG_MMCSD_HAVE_CARDDETECT
# define SDCARD_INT_CDET SDMMC_INT_CDET
#else
# define SDCARD_INT_CDET 0
#endif
#define SDCARD_CMDDONE_STA (SDMMC_INT_CDONE)
#define SDCARD_RESPDONE_STA (0)
#define SDCARD_CMDDONE_MASK (SDMMC_INT_CDONE)
#define SDCARD_RESPDONE_MASK (SDMMC_INT_CDONE | SDCARD_INT_RESPERR)
#define SDCARD_XFRDONE_MASK (0) /* Handled by transfer masks */
#define SDCARD_CMDDONE_CLEAR (SDMMC_INT_CDONE)
#define SDCARD_RESPDONE_CLEAR (SDMMC_INT_CDONE | SDCARD_INT_RESPERR)
#define SDCARD_XFRDONE_CLEAR (SDCARD_TRANSFER_ALL)
#define SDCARD_WAITALL_CLEAR (SDCARD_CMDDONE_CLEAR | SDCARD_RESPDONE_CLEAR | \
SDCARD_XFRDONE_CLEAR)
/* Let's wait until we have both SD card transfer complete and DMA
* complete.
*/
#define SDCARD_XFRDONE_FLAG (1)
#define SDCARD_DMADONE_FLAG (2)
#define SDCARD_ALLDONE (3)
/* Card debounce time. Number of host clocks (SD_CLK) used by debounce
* filter logic for card detect. typical debounce time is 5-25 ms.
*
* Eg. Fsd = 44MHz, ticks = 660,000
*/
#define DEBOUNCE_TICKS (15 * (BOARD_SDMMC_FREQUENCY / 1000))
/****************************************************************************
* Private Types
****************************************************************************/
struct sdmmc_dma_s
{
volatile uint32_t des0; /* Control and status */
volatile uint32_t des1; /* Buffer size(s) */
volatile uint32_t des2; /* Buffer address pointer 1 */
volatile uint32_t des3; /* Buffer address pointer 2 */
};
/* This structure defines the state of the LPC54XX SD card interface */
struct lpc54_dev_s
{
struct sdio_dev_s dev; /* Standard, base SD card interface */
/* LPC54XX-specific extensions */
/* Event support */
sem_t waitsem; /* Implements event waiting */
sdio_eventset_t waitevents; /* Set of events to be waited for */
uint32_t waitmask; /* Interrupt enables for event waiting */
volatile sdio_eventset_t wkupevent; /* The event that caused the wakeup */
struct wdog_s waitwdog; /* Watchdog that handles event timeouts */
/* Callback support */
sdio_statset_t cdstatus; /* Card status */
sdio_eventset_t cbevents; /* Set of events to be cause callbacks */
worker_t callback; /* Registered callback function */
void *cbarg; /* Registered callback argument */
struct work_s cbwork; /* Callback work queue structure */
/* Interrupt mode data transfer support */
uint32_t *buffer; /* Address of current R/W buffer */
uint32_t xfrmask; /* Interrupt enables for data transfer */
#ifdef CONFIG_LPC54_SDMMC_DMA
uint32_t dmamask; /* Interrupt enables for DMA transfer */
#endif
ssize_t remaining; /* Number of bytes remaining in the
* transfer */
bool wrdir; /* True: Writing False: Reading */
/* DMA data transfer support */
bool widebus; /* Required for DMA support */
#ifdef CONFIG_LPC54_SDMMC_DMA
bool dmamode; /* true: DMA mode transfer */
#endif
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#ifdef CONFIG_LPC54_SDMMC_REGDEBUG
static uint32_t lpc54_getreg(uint32_t addr);
static void lpc54_putreg(uint32_t val, uint32_t addr);
#else
# define lpc54_getreg(addr) getreg32(addr)
# define lpc54_putreg(val,addr) putreg32(val,addr)
#endif
/* Low-level helpers ********************************************************/
static inline void lpc54_setclock(uint32_t clkdiv);
static inline void lpc54_sdcard_clock(bool enable);
static int lpc54_ciu_sendcmd(uint32_t cmd, uint32_t arg);
static void lpc54_enable_ints(struct lpc54_dev_s *priv);
static void lpc54_disable_allints(struct lpc54_dev_s *priv);
static void lpc54_config_waitints(struct lpc54_dev_s *priv,
uint32_t waitmask, sdio_eventset_t waitevents,
sdio_eventset_t wkupevents);
static void lpc54_config_xfrints(struct lpc54_dev_s *priv, uint32_t xfrmask);
#ifdef CONFIG_LPC54_SDMMC_DMA
static void lpc54_config_dmaints(struct lpc54_dev_s *priv, uint32_t xfrmask,
uint32_t dmamask);
#endif
/* Data Transfer Helpers ****************************************************/
static void lpc54_eventtimeout(wdparm_t arg);
static void lpc54_endwait(struct lpc54_dev_s *priv,
sdio_eventset_t wkupevent);
static void lpc54_endtransfer(struct lpc54_dev_s *priv,
sdio_eventset_t wkupevent);
/* Interrupt Handling *******************************************************/
static int lpc54_sdmmc_interrupt(int irq, void *context, void *arg);
/* SD Card Interface Methods ************************************************/
/* Mutual exclusion */
#ifdef CONFIG_SDIO_MUXBUS
static int lpc54_lock(struct sdio_dev_s *dev, bool lock);
#endif
/* Initialization/setup */
static void lpc54_reset(struct sdio_dev_s *dev);
static sdio_capset_t lpc54_capabilities(struct sdio_dev_s *dev);
static uint8_t lpc54_status(struct sdio_dev_s *dev);
static void lpc54_widebus(struct sdio_dev_s *dev, bool enable);
static void lpc54_clock(struct sdio_dev_s *dev,
enum sdio_clock_e rate);
static int lpc54_attach(struct sdio_dev_s *dev);
/* Command/Status/Data Transfer */
static int lpc54_sendcmd(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t arg);
#ifdef CONFIG_SDIO_BLOCKSETUP
static void lpc54_blocksetup(struct sdio_dev_s *dev,
unsigned int blocklen, unsigned int nblocks);
#endif
static int lpc54_recvsetup(struct sdio_dev_s *dev, uint8_t *buffer,
size_t nbytes);
static int lpc54_sendsetup(struct sdio_dev_s *dev,
const uint8_t *buffer, uint32_t nbytes);
static int lpc54_cancel(struct sdio_dev_s *dev);
static int lpc54_waitresponse(struct sdio_dev_s *dev, uint32_t cmd);
static int lpc54_recvshortcrc(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rshort);
static int lpc54_recvlong(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t rlong[4]);
static int lpc54_recvshort(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rshort);
static int lpc54_recvnotimpl(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rnotimpl);
/* EVENT handler */
static void lpc54_waitenable(struct sdio_dev_s *dev,
sdio_eventset_t eventset, uint32_t timeout);
static sdio_eventset_t lpc54_eventwait(struct sdio_dev_s *dev);
static void lpc54_callbackenable(struct sdio_dev_s *dev,
sdio_eventset_t eventset);
static void lpc54_callback(struct lpc54_dev_s *priv);
static int lpc54_registercallback(struct sdio_dev_s *dev,
worker_t callback, void *arg);
#ifdef CONFIG_LPC54_SDMMC_DMA
/* DMA */
static int lpc54_dmarecvsetup(struct sdio_dev_s *dev,
uint8_t *buffer, size_t buflen);
static int lpc54_dmasendsetup(struct sdio_dev_s *dev,
const uint8_t *buffer, size_t buflen);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
struct lpc54_dev_s g_scard_dev =
{
.dev =
{
#ifdef CONFIG_SDIO_MUXBUS
.lock = lpc54_lock,
#endif
.reset = lpc54_reset,
.capabilities = lpc54_capabilities,
.status = lpc54_status,
.widebus = lpc54_widebus,
.clock = lpc54_clock,
.attach = lpc54_attach,
.sendcmd = lpc54_sendcmd,
#ifdef CONFIG_SDIO_BLOCKSETUP
.blocksetup = lpc54_blocksetup,
#endif
.recvsetup = lpc54_recvsetup,
.sendsetup = lpc54_sendsetup,
.cancel = lpc54_cancel,
.waitresponse = lpc54_waitresponse,
.recv_r1 = lpc54_recvshortcrc,
.recv_r2 = lpc54_recvlong,
.recv_r3 = lpc54_recvshort,
.recv_r4 = lpc54_recvnotimpl,
.recv_r5 = lpc54_recvnotimpl,
.recv_r6 = lpc54_recvshortcrc,
.recv_r7 = lpc54_recvshort,
.waitenable = lpc54_waitenable,
.eventwait = lpc54_eventwait,
.callbackenable = lpc54_callbackenable,
.registercallback = lpc54_registercallback,
#ifdef CONFIG_LPC54_SDMMC_DMA
.dmarecvsetup = lpc54_dmarecvsetup,
.dmasendsetup = lpc54_dmasendsetup,
#endif
},
.waitsem = SEM_INITIALIZER(0),
};
#ifdef CONFIG_LPC54_SDMMC_DMA
static struct sdmmc_dma_s g_sdmmc_dmadd[NUM_DMA_DESCRIPTORS];
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lpc54_getreg
*
* Description:
* This function may to used to intercept an monitor all register accesses.
* Clearly this is nothing you would want to do unless you are debugging
* this driver.
*
* Input Parameters:
* addr - The register address to read
*
* Returned Value:
* The value read from the register
*
****************************************************************************/
#ifdef CONFIG_LPC54_SDMMC_REGDEBUG
static uint32_t lpc54_getreg(uint32_t addr)
{
static uint32_t prevaddr = 0;
static uint32_t preval = 0;
static uint32_t count = 0;
/* Read the value from the register */
uint32_t val = getreg32(addr);
/* Is this the same value that we read from the same register last time?
* Are we polling the register? If so, suppress some of the output.
*/
if (addr == prevaddr && val == preval)
{
if (count == 0xffffffff || ++count > 3)
{
if (count == 4)
{
mcinfo("...\n");
}
return val;
}
}
/* No this is a new address or value */
else
{
/* Did we print "..." for the previous value? */
if (count > 3)
{
/* Yes.. then show how many times the value repeated */
mcinfo("[repeats %d more times]\n", count - 3);
}
/* Save the new address, value, and count */
prevaddr = addr;
preval = val;
count = 1;
}
/* Show the register value read */
mcinfo("%08x->%08x\n", addr, val);
return val;
}
#endif
/****************************************************************************
* Name: lpc54_putreg
*
* Description:
* This function may to used to intercept an monitor all register accesses.
* Clearly this is nothing you would want to do unless you are debugging
* this driver.
*
* Input Parameters:
* val - The value to write to the register
* addr - The register address to read
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_LPC54_SDMMC_REGDEBUG
static void lpc54_putreg(uint32_t val, uint32_t addr)
{
/* Show the register value being written */
mcinfo("%08x<-%08x\n", addr, val);
/* Write the value */
putreg32(val, addr);
}
#endif
/****************************************************************************
* Name: lpc54_setclock
*
* Description:
* Define the new clock frequency
*
* Input Parameters:
* clkdiv - A new division value to generate the needed frequency.
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lpc54_setclock(uint32_t clkdiv)
{
mcinfo("clkdiv=%08lx\n", (unsigned long)clkdiv);
/* Disable the clock before setting frequency */
lpc54_sdcard_clock(false);
/* Inform CIU */
lpc54_ciu_sendcmd(SDMMC_CMD_UPDCLOCK | SDMMC_CMD_WAITPREV, 0);
/* Set Divider0 to desired value */
lpc54_putreg(clkdiv, LPC54_SDMMC_CLKDIV);
/* Inform CIU */
lpc54_ciu_sendcmd(SDMMC_CMD_UPDCLOCK | SDMMC_CMD_WAITPREV, 0);
/* Enable the clock */
lpc54_sdcard_clock(true);
/* Inform CIU */
lpc54_ciu_sendcmd(SDMMC_CMD_UPDCLOCK | SDMMC_CMD_WAITPREV, 0);
}
/****************************************************************************
* Name: lpc54_sdcard_clock
*
* Description: Enable/Disable the SDCard clock
*
* Input Parameters:
* enable - False = clock disabled; True = clock enabled.
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lpc54_sdcard_clock(bool enable)
{
if (enable)
{
lpc54_putreg(SDMMC_CLKENA_ENABLE, LPC54_SDMMC_CLKENA);
}
else
{
lpc54_putreg(0, LPC54_SDMMC_CLKENA);
}
}
/****************************************************************************
* Name: lpc54_ciu_sendcmd
*
* Description:
* Function to send command to Card interface unit (CIU)
*
* Input Parameters:
* cmd - The command to be executed
* arg - The argument to use with the command.
*
* Returned Value:
* Returns zero on success. One will be returned on a timeout.
*
****************************************************************************/
static int lpc54_ciu_sendcmd(uint32_t cmd, uint32_t arg)
{
clock_t watchtime;
mcinfo("cmd=%04lx arg=%04lx\n", (unsigned long)cmd, (unsigned long)arg);
DEBUGASSERT((lpc54_getreg(LPC54_SDMMC_CMD) & SDMMC_CMD_STARTCMD) == 0);
/* Set command arg reg */
lpc54_putreg(arg, LPC54_SDMMC_CMDARG);
lpc54_putreg(SDMMC_CMD_STARTCMD | cmd, LPC54_SDMMC_CMD);
/* Poll until command is accepted by the CIU, or we timeout */
watchtime = clock_systime_ticks();
while ((lpc54_getreg(LPC54_SDMMC_CMD) & SDMMC_CMD_STARTCMD) != 0)
{
if (watchtime - clock_systime_ticks() > SDCARD_CMDTIMEOUT)
{
mcerr("TMO Timed out (%08X)\n",
lpc54_getreg(LPC54_SDMMC_CMD));
return 1;
}
}
return 0;
}
/****************************************************************************
* Name: lpc54_enable_ints
*
* Description:
* Enable/disable SD card interrupts per functional settings.
*
* Input Parameters:
* priv - A reference to the SD card device state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_enable_ints(struct lpc54_dev_s *priv)
{
uint32_t regval;
#ifdef CONFIG_LPC54_SDMMC_DMA
mcinfo("waitmask=%04lx xfrmask=%04lx dmamask=%04lx RINTSTS=%08lx\n",
(unsigned long)priv->waitmask, (unsigned long)priv->xfrmask,
(unsigned long)priv->dmamask,
(unsigned long)lpc54_getreg(LPC54_SDMMC_RINTSTS));
/* Enable DMA-related interrupts */
lpc54_putreg(priv->dmamask, LPC54_SDMMC_IDINTEN);
#else
mcinfo("waitmask=%04lx xfrmask=%04lx RINTSTS=%08lx\n",
(unsigned long)priv->waitmask, (unsigned long)priv->xfrmask,
(unsigned long)lpc54_getreg(LPC54_SDMMC_RINTSTS));
#endif
/* Enable SDMMC interrupts */
regval = priv->xfrmask | priv->waitmask | SDCARD_INT_CDET;
lpc54_putreg(regval, LPC54_SDMMC_INTMASK);
}
/****************************************************************************
* Name: lpc54_disable_allints
*
* Description:
* Disable all SD card interrupts.
*
* Input Parameters:
* priv - A reference to the SD card device state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_disable_allints(struct lpc54_dev_s *priv)
{
#ifdef CONFIG_LPC54_SDMMC_DMA
/* Disable DMA-related interrupts */
lpc54_putreg(0, LPC54_SDMMC_IDINTEN);
priv->dmamask = 0;
#endif
/* Disable all SDMMC interrupts (except card detect) */
lpc54_putreg(SDCARD_INT_CDET, LPC54_SDMMC_INTMASK);
priv->waitmask = 0;
priv->xfrmask = 0;
}
/****************************************************************************
* Name: lpc54_config_waitints
*
* Description:
* Enable/disable SD card interrupts needed to support the wait function
*
* Input Parameters:
* priv - A reference to the SD card device state structure
* waitmask - The set of bits in the SD card INTMASK register to set
* waitevents - Waited for events
* wkupevent - Wake-up events
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_config_waitints(struct lpc54_dev_s *priv,
uint32_t waitmask,
sdio_eventset_t waitevents,
sdio_eventset_t wkupevent)
{
irqstate_t flags;
mcinfo("waitevents=%04x wkupevent=%04x\n",
(unsigned)waitevents, (unsigned)wkupevent);
/* Save all of the data and set the new interrupt mask in one, atomic
* operation.
*/
flags = enter_critical_section();
priv->waitevents = waitevents;
priv->wkupevent = wkupevent;
priv->waitmask = waitmask;
lpc54_enable_ints(priv);
leave_critical_section(flags);
}
/****************************************************************************
* Name: lpc54_config_xfrints
*
* Description:
* Enable SD card interrupts needed to support the data transfer event
*
* Input Parameters:
* priv - A reference to the SD card device state structure
* xfrmask - The set of bits in the SD card MASK register to set
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_config_xfrints(struct lpc54_dev_s *priv, uint32_t xfrmask)
{
irqstate_t flags;
flags = enter_critical_section();
priv->xfrmask = xfrmask;
lpc54_enable_ints(priv);
leave_critical_section(flags);
}
/****************************************************************************
* Name: lpc54_config_dmaints
*
* Description:
* Enable DMA transfer interrupts
*
* Input Parameters:
* priv - A reference to the SD card device state structure
* dmamask - The set of bits in the SD card MASK register to set
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_LPC54_SDMMC_DMA
static void lpc54_config_dmaints(struct lpc54_dev_s *priv, uint32_t xfrmask,
uint32_t dmamask)
{
irqstate_t flags;
flags = enter_critical_section();
priv->xfrmask = xfrmask;
priv->dmamask = dmamask;
lpc54_enable_ints(priv);
leave_critical_section(flags);
}
#endif
/****************************************************************************
* Name: lpc54_eventtimeout
*
* Description:
* The watchdog timeout setup when the event wait start has expired without
* any other waited-for event occurring.
*
* Input Parameters:
* arg - The argument
*
* Returned Value:
* None
*
* Assumptions:
* Always called from the interrupt level with interrupts disabled.
*
****************************************************************************/
static void lpc54_eventtimeout(wdparm_t arg)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)arg;
mcinfo("argc=%d, arg=%08lx\n", argc, (unsigned long)arg);
/* There is always race conditions with timer expirations. */
DEBUGASSERT((priv->waitevents & SDIOWAIT_TIMEOUT) != 0 ||
priv->wkupevent != 0);
/* Is a data transfer complete event expected? */
if ((priv->waitevents & SDIOWAIT_TIMEOUT) != 0)
{
/* Yes.. wake up any waiting threads */
lpc54_endwait(priv, SDIOWAIT_TIMEOUT);
mcerr("ERROR: Timeout: remaining: %d\n", priv->remaining);
}
}
/****************************************************************************
* Name: lpc54_endwait
*
* Description:
* Wake up a waiting thread if the waited-for event has occurred.
*
* Input Parameters:
* priv - An instance of the SD card device interface
* wkupevent - The event that caused the wait to end
*
* Returned Value:
* None
*
* Assumptions:
* Always called from the interrupt level with interrupts disabled.
*
****************************************************************************/
static void lpc54_endwait(struct lpc54_dev_s *priv,
sdio_eventset_t wkupevent)
{
mcinfo("wkupevent=%04x\n", (unsigned)wkupevent);
/* Cancel the watchdog timeout */
wd_cancel(&priv->waitwdog);
/* Disable event-related interrupts */
lpc54_config_waitints(priv, 0, 0, wkupevent);
/* Wake up the waiting thread */
nxsem_post(&priv->waitsem);
}
/****************************************************************************
* Name: lpc54_endtransfer
*
* Description:
* Terminate a transfer with the provided status. This function is called
* only from the SD card interrupt handler when end-of-transfer conditions
* are detected.
*
* Input Parameters:
* priv - An instance of the SD card device interface
* wkupevent - The event that caused the transfer to end
*
* Returned Value:
* None
*
* Assumptions:
* Always called from the interrupt level with interrupts disabled.
*
****************************************************************************/
static void lpc54_endtransfer(struct lpc54_dev_s *priv,
sdio_eventset_t wkupevent)
{
mcinfo("wkupevent=%04x\n", (unsigned)wkupevent);
/* Disable all transfer related interrupts */
lpc54_config_xfrints(priv, 0);
/* Clearing pending interrupt status on all transfer related interrupts */
lpc54_putreg(priv->waitmask, LPC54_SDMMC_RINTSTS);
/* Mark the transfer finished */
priv->remaining = 0;
/* Is a thread wait for these data transfer complete events? */
if ((priv->waitevents & wkupevent) != 0)
{
/* Yes.. wake up any waiting threads */
lpc54_endwait(priv, wkupevent);
}
}
/****************************************************************************
* Name: lpc54_sdmmc_interrupt
*
* Description:
* SD card interrupt handler
*
* Input Parameters:
* dev - An instance of the SD card device interface
*
* Returned Value:
* None
*
****************************************************************************/
static int lpc54_sdmmc_interrupt(int irq, void *context, void *arg)
{
struct lpc54_dev_s *priv = &g_scard_dev;
uint32_t enabled;
uint32_t pending;
/* Loop while there are pending interrupts. Check the SD card status
* register. Mask out all bits that don't correspond to enabled
* interrupts. (This depends on the fact that bits are ordered
* the same in both the STA and MASK register). If there are non-zero
* bits remaining, then we have work to do here.
*/
while ((enabled = lpc54_getreg(LPC54_SDMMC_MINTSTS)) != 0)
{
/* Clear pending status */
lpc54_putreg(enabled, LPC54_SDMMC_RINTSTS);
#ifdef CONFIG_MMCSD_HAVE_CARDDETECT
/* Handle in card detection events ************************************/
if ((enabled & SDMMC_INT_CDET) != 0)
{
sdio_statset_t cdstatus;
/* Update card status */
cdstatus = priv->cdstatus;
if ((lpc54_getreg(LPC54_SDMMC_CDETECT) &
SDMMC_CDETECT_NOTPRESENT) == 0)
{
priv->cdstatus |= SDIO_STATUS_PRESENT;
#ifdef CONFIG_MMCSD_HAVE_WRITEPROTECT
if ((lpc54_getreg(LPC54_SDMMC_WRTPRT) &
SDMMC_WRTPRT_PROTECTED) != 0)
{
priv->cdstatus |= SDIO_STATUS_WRPROTECTED;
}
else
#endif
{
priv->cdstatus &= ~SDIO_STATUS_WRPROTECTED;
}
#ifdef CONFIG_LPC54_SDMMC_PWRCTRL
/* Enable/ power to the SD card */
lpc54_putreg(SDMMC_PWREN, LPC54_SDMMC_PWREN);
#endif
}
else
{
priv->cdstatus &=
~(SDIO_STATUS_PRESENT | SDIO_STATUS_WRPROTECTED);
#ifdef CONFIG_LPC54_SDMMC_PWRCTRL
/* Disable power to the SD card */
lpc54_putreg(0, LPC54_SDMMC_PWREN);
#endif
}
mcinfo("cdstatus OLD: %02x NEW: %02x\n", cdstatus, priv->cdstatus);
/* Perform any requested callback if the status has changed */
if (cdstatus != priv->cdstatus)
{
lpc54_callback(priv);
}
}
#endif
/* Handle data transfer events ****************************************/
pending = enabled & priv->xfrmask;
if (pending != 0)
{
/* Handle data request events */
if ((pending & SDMMC_INT_TXDR) != 0)
{
uint32_t status;
/* Transfer data to the TX FIFO */
DEBUGASSERT(priv->wrdir);
for (status = lpc54_getreg(LPC54_SDMMC_STATUS);
(status & SDMMC_STATUS_FIFOFULL) == 0 &&
priv->remaining > 0;
status = lpc54_getreg(LPC54_SDMMC_STATUS))
{
lpc54_putreg(*priv->buffer, LPC54_SDMMC_DATA);
priv->buffer++;
priv->remaining -= 4;
}
}
else if ((pending & SDMMC_INT_RXDR) != 0)
{
uint32_t status;
/* Transfer data from the RX FIFO */
DEBUGASSERT(!priv->wrdir);
for (status = lpc54_getreg(LPC54_SDMMC_STATUS);
(status & SDMMC_STATUS_FIFOEMPTY) == 0 &&
priv->remaining > 0;
status = lpc54_getreg(LPC54_SDMMC_STATUS))
{
*priv->buffer = lpc54_getreg(LPC54_SDMMC_DATA);
priv->buffer++;
priv->remaining -= 4;
}
}
/* Check for transfer errors */
/* Handle data block send/receive CRC failure */
if ((pending & SDMMC_INT_DCRC) != 0)
{
/* Terminate the transfer with an error */
mcerr("ERROR: Data CRC failure, pending=%08x remaining: %d\n",
pending, priv->remaining);
lpc54_endtransfer(priv,
SDIOWAIT_TRANSFERDONE | SDIOWAIT_ERROR);
}
/* Handle data timeout error */
else if ((pending & SDMMC_INT_DRTO) != 0)
{
/* Terminate the transfer with an error */
mcerr("ERROR: Data timeout, pending=%08x remaining: %d\n",
pending, priv->remaining);
lpc54_endtransfer(priv,
SDIOWAIT_TRANSFERDONE | SDIOWAIT_TIMEOUT);
}
/* Handle RX FIFO overrun error */
else if ((pending & SDMMC_INT_FRUN) != 0)
{
/* Terminate the transfer with an error */
mcerr("ERROR: RX FIFO overrun, pending=%08x remaining: %d\n",
pending, priv->remaining);
lpc54_endtransfer(priv,
SDIOWAIT_TRANSFERDONE | SDIOWAIT_ERROR);
}
/* Handle TX FIFO underrun error */
else if ((pending & SDMMC_INT_FRUN) != 0)
{
/* Terminate the transfer with an error */
mcerr("ERROR: TX FIFO underrun, pending=%08x remaining: %d\n",
pending, priv->remaining);
lpc54_endtransfer(priv,
SDIOWAIT_TRANSFERDONE | SDIOWAIT_ERROR);
}
/* Handle start bit error */
else if ((pending & SDMMC_INT_SBE) != 0)
{
/* Terminate the transfer with an error */
mcerr("ERROR: Start bit, pending=%08x remaining: %d\n",
pending, priv->remaining);
lpc54_endtransfer(priv,
SDIOWAIT_TRANSFERDONE | SDIOWAIT_ERROR);
}
/* Handle data end events. Note that RXDR may accompany DTO, DTO
* will be set on received while there is still data in the FIFO.
* So for the case of receiving, we don't actually even enable the
* DTO interrupt.
*/
else if ((pending & SDMMC_INT_DTO) != 0)
{
/* Finish the transfer */
lpc54_endtransfer(priv, SDIOWAIT_TRANSFERDONE);
}
}
/* Handle wait events *************************************************/
pending = enabled & priv->waitmask;
if (pending != 0)
{
/* Is this a response error event? */
if ((pending & SDCARD_INT_RESPERR) != 0)
{
/* If response errors are enabled, then we must certainly be
* waiting for a response.
*/
DEBUGASSERT((priv->waitevents & SDIOWAIT_RESPONSEDONE) != 0);
/* Wake the thread up */
mcerr("ERROR: Response error, pending=%08x\n", pending);
lpc54_endwait(priv, SDIOWAIT_RESPONSEDONE | SDIOWAIT_ERROR);
}
/* Is this a command (plus response) completion event? */
else if ((pending & SDMMC_INT_CDONE) != 0)
{
/* Yes.. Is their a thread waiting for response done? */
if ((priv->waitevents & SDIOWAIT_RESPONSEDONE) != 0)
{
/* Yes.. wake the thread up */
lpc54_endwait(priv, SDIOWAIT_RESPONSEDONE);
}
/* NO.. Is their a thread waiting for command done? */
else if ((priv->waitevents & SDIOWAIT_CMDDONE) != 0)
{
/* Yes.. wake the thread up */
lpc54_endwait(priv, SDIOWAIT_CMDDONE);
}
}
}
}
#ifdef CONFIG_LPC54_SDMMC_DMA
/* DMA error events *******************************************************/
pending = lpc54_getreg(LPC54_SDMMC_IDSTS);
if ((pending & priv->dmamask) != 0)
{
mcerr("ERROR: IDTS=%08lx\n", (unsigned long)pending);
/* Clear the pending interrupts */
lpc54_putreg(pending, LPC54_SDMMC_IDSTS);
/* Abort the transfer */
lpc54_endtransfer(priv, SDIOWAIT_TRANSFERDONE | SDIOWAIT_ERROR);
}
#endif
return OK;
}
/****************************************************************************
* Name: lpc54_lock
*
* Description:
* Locks the bus. Function calls low-level multiplexed bus routines to
* resolve bus requests and acknowledgment issues.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* lock - TRUE to lock, FALSE to unlock.
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_SDIO_MUXBUS
static int lpc54_lock(struct sdio_dev_s *dev, bool lock)
{
/* Single SD card instance so there is only one possibility. The multiplex
* bus is part of board support package.
*/
/* FIXME: Implement the below function to support bus share:
*
* lpc54_muxbus_sdio_lock(lock);
*/
return OK;
}
#endif
/****************************************************************************
* Name: lpc54_reset
*
* Description:
* Reset the SD card controller. Undo all setup and initialization.
*
* Input Parameters:
* dev - An instance of the SD card device interface
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_reset(struct sdio_dev_s *dev)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
irqstate_t flags;
uint32_t regval;
mcinfo("Resetting...\n");
flags = enter_critical_section();
/* Reset DMA controller internal registers. */
lpc54_putreg(SDMMC_BMOD_SWR, LPC54_SDMMC_BMOD);
/* Reset all blocks */
lpc54_putreg(SDMMC_CTRL_CNTLRRESET | SDMMC_CTRL_FIFORESET |
SDMMC_CTRL_DMARESET, LPC54_SDMMC_CTRL);
while ((lpc54_getreg(LPC54_SDMMC_CTRL) &
(SDMMC_CTRL_CNTLRRESET | SDMMC_CTRL_FIFORESET |
SDMMC_CTRL_DMARESET)) != 0)
{
}
/* Reset data */
priv->waitevents = 0; /* Set of events to be waited for */
priv->waitmask = 0; /* Interrupt enables for event waiting */
priv->wkupevent = 0; /* The event that caused the wakeup */
wd_cancel(&priv->waitwdog); /* Cancel any timeouts */
/* Interrupt mode data transfer support */
priv->buffer = 0; /* Address of current R/W buffer */
priv->remaining = 0; /* Number of bytes remaining in the transfer */
priv->xfrmask = 0; /* Interrupt enables for data transfer */
#ifdef CONFIG_LPC54_SDMMC_DMA
priv->dmamask = 0; /* Interrupt enables for DMA transfer */
#endif
/* DMA data transfer support */
priv->widebus = true; /* Required for DMA support */
priv->cdstatus = 0; /* Card status is unknown */
#ifdef CONFIG_LPC54_SDMMC_DMA
priv->dmamode = false; /* true: DMA mode transfer */
#endif
/* Select 1-bit wide bus */
lpc54_putreg(SDMMC_CTYPE_WIDTH1, LPC54_SDMMC_CTYPE);
/* Enable interrupts */
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval |= SDMMC_CTRL_INTENABLE;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
/* Disable Interrupts except for card detection. */
lpc54_putreg(SDCARD_INT_CDET, LPC54_SDMMC_INTMASK);
#ifdef CONFIG_MMCSD_HAVE_CARDDETECT
/* Set the card debounce time. Number of host clocks (SD_CLK) used by
* debounce filter logic for card detect. typical debounce time is 5-25
* ms.
*/
lpc54_putreg(DEBOUNCE_TICKS, LPC54_SDMMC_DEBNCE);
#endif
/* Clear to Interrupts */
lpc54_putreg(0xffffffff, LPC54_SDMMC_RINTSTS);
/* Define MAX Timeout */
lpc54_putreg(0x7fffffff, LPC54_SDMMC_TMOUT);
/* Disable clock to CIU (needs latch) */
lpc54_putreg(0, LPC54_SDMMC_CLKENA);
leave_critical_section(flags);
#if defined(CONFIG_LPC54_SDMMC_PWRCTRL) && !defined(CONFIG_MMCSD_HAVE_CARDDETECT)
/* Enable power to the SD card */
lpc54_putreg(SDMMC_PWREN, LPC54_SDMMC_PWREN);
#endif
}
/****************************************************************************
* Name: lpc54_capabilities
*
* Description:
* Get capabilities (and limitations) of the SDIO driver (optional)
*
* Input Parameters:
* dev - Device-specific state data
*
* Returned Value:
* Returns a bitset of status values (see SDIO_CAPS_* defines)
*
****************************************************************************/
static sdio_capset_t lpc54_capabilities(struct sdio_dev_s *dev)
{
sdio_capset_t caps = 0;
caps |= SDIO_CAPS_DMABEFOREWRITE;
#ifdef CONFIG_SDIO_WIDTH_D1_ONLY
caps |= SDIO_CAPS_1BIT_ONLY;
#endif
#ifdef CONFIG_LPC54_SDMMC_DMA
caps |= SDIO_CAPS_DMASUPPORTED;
#endif
return caps;
}
/****************************************************************************
* Name: lpc54_status
*
* Description:
* Get SD card status.
*
* Input Parameters:
* dev - Device-specific state data
*
* Returned Value:
* Returns a bitset of status values (see lpc54_status_* defines)
*
****************************************************************************/
static sdio_statset_t lpc54_status(struct sdio_dev_s *dev)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
#ifdef CONFIG_MMCSD_HAVE_CARDDETECT
if ((lpc54_getreg(LPC54_SDMMC_CDETECT) & SDMMC_CDETECT_NOTPRESENT) == 0)
{
priv->cdstatus |= SDIO_STATUS_PRESENT;
}
else
{
priv->cdstatus &= ~SDIO_STATUS_PRESENT;
}
#endif
mcinfo("cdstatus=%02x\n", priv->cdstatus);
return priv->cdstatus;
}
/****************************************************************************
* Name: lpc54_widebus
*
* Description:
* Called after change in Bus width has been selected (via ACMD6). Most
* controllers will need to perform some special operations to work
* correctly in the new bus mode.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* wide - true: wide bus (4-bit) bus mode enabled
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_widebus(struct sdio_dev_s *dev, bool wide)
{
mcinfo("wide=%d\n", wide);
}
/****************************************************************************
* Name: lpc54_clock
*
* Description:
* Enable/disable SD card clocking
*
* Input Parameters:
* dev - An instance of the SD card device interface
* rate - Specifies the clocking to use (see enum sdio_clock_e)
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_clock(struct sdio_dev_s *dev, enum sdio_clock_e rate)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
uint8_t clkdiv;
uint8_t ctype;
bool enabled = false;
bool widebus = false;
switch (rate)
{
/* Disable clocking (with default ID mode divisor) */
default:
case CLOCK_SDIO_DISABLED:
clkdiv = SDMMC_CLKDIV0(BOARD_CLKDIV_INIT);
ctype = SDCARD_BUS_D1;
enabled = false;
widebus = false;
return;
break;
/* Enable in initial ID mode clocking (<400KHz) */
case CLOCK_IDMODE:
clkdiv = SDMMC_CLKDIV0(BOARD_CLKDIV_INIT);
ctype = SDCARD_BUS_D1;
enabled = true;
widebus = false;
break;
/* Enable in MMC normal operation clocking */
case CLOCK_MMC_TRANSFER:
clkdiv = SDMMC_CLKDIV0(BOARD_CLKDIV_MMCXFR);
ctype = SDCARD_BUS_D1;
enabled = true;
widebus = false;
break;
/* SD normal operation clocking (wide 4-bit mode) */
case CLOCK_SD_TRANSFER_4BIT:
#ifndef CONFIG_SDIO_WIDTH_D1_ONLY
clkdiv = SDMMC_CLKDIV0(BOARD_CLKDIV_SDWIDEXFR);
ctype = SDCARD_BUS_D4;
enabled = true;
widebus = true;
break;
#endif
/* SD normal operation clocking (narrow 1-bit mode) */
case CLOCK_SD_TRANSFER_1BIT:
clkdiv = SDMMC_CLKDIV0(BOARD_CLKDIV_SDXFR);
ctype = SDCARD_BUS_D1;
enabled = true;
widebus = false;
break;
}
/* Setup the card bus width */
mcinfo("widebus=%d\n", widebus);
priv->widebus = widebus;
lpc54_putreg(ctype, LPC54_SDMMC_CTYPE);
/* Set the new clock frequency division */
lpc54_setclock(clkdiv);
/* Enable the new clock */
lpc54_sdcard_clock(enabled);
}
/****************************************************************************
* Name: lpc54_attach
*
* Description:
* Attach and prepare interrupts
*
* Input Parameters:
* dev - An instance of the SD card device interface
*
* Returned Value:
* OK on success; A negated errno on failure.
*
****************************************************************************/
static int lpc54_attach(struct sdio_dev_s *dev)
{
int ret;
uint32_t regval;
mcinfo("Attaching..\n");
/* Attach the SD card interrupt handler */
ret = irq_attach(LPC54_IRQ_SDMMC, lpc54_sdmmc_interrupt, NULL);
if (ret == OK)
{
/* Disable all interrupts at the SD card controller and clear static
* interrupt flags
*/
lpc54_putreg(0, LPC54_SDMMC_INTMASK);
lpc54_putreg(SDMMC_INT_ALL, LPC54_SDMMC_RINTSTS);
/* Enable Interrupts to happen when the INTMASK is activated */
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval |= SDMMC_CTRL_INTENABLE;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
/* Enable card detection interrupts */
lpc54_putreg(SDCARD_INT_CDET, LPC54_SDMMC_INTMASK);
/* Enable SD card interrupts at the NVIC. They can now be enabled at
* the SD card controller as needed.
*/
up_enable_irq(LPC54_IRQ_SDMMC);
}
return ret;
}
/****************************************************************************
* Name: lpc54_sendcmd
*
* Description:
* Send the SD card command
*
* Input Parameters:
* dev - An instance of the SD card device interface
* cmd - The command to send (32-bits, encoded)
* arg - 32-bit argument required with some commands
*
* Returned Value:
* None
*
****************************************************************************/
static int lpc54_sendcmd(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t arg)
{
uint32_t regval = 0;
uint32_t cmdidx;
mcinfo("cmd=%04x arg=%04x\n", cmd, arg);
/* The CMD0 needs the SENDINIT CMD */
if (cmd == 0)
{
regval |= SDMMC_CMD_SENDINIT;
}
/* Is this a Read/Write Transfer Command ? */
if ((cmd & MMCSD_WRDATAXFR) == MMCSD_WRDATAXFR)
{
regval |= SDMMC_CMD_DATAXFREXPTD | SDMMC_CMD_WRITE |
SDMMC_CMD_WAITPREV;
}
else if ((cmd & MMCSD_RDDATAXFR) == MMCSD_RDDATAXFR)
{
regval |= SDMMC_CMD_DATAXFREXPTD | SDMMC_CMD_WAITPREV;
}
/* Set WAITRESP bits */
switch (cmd & MMCSD_RESPONSE_MASK)
{
case MMCSD_NO_RESPONSE:
regval |= SDMMC_CMD_NORESPONSE;
break;
case MMCSD_R1B_RESPONSE:
regval |= SDMMC_CMD_WAITPREV;
case MMCSD_R1_RESPONSE:
case MMCSD_R3_RESPONSE:
case MMCSD_R4_RESPONSE:
case MMCSD_R5_RESPONSE:
case MMCSD_R6_RESPONSE:
case MMCSD_R7_RESPONSE:
regval |= SDMMC_CMD_SHORTRESPONSE;
break;
case MMCSD_R2_RESPONSE:
regval |= SDMMC_CMD_LONGRESPONSE;
break;
}
/* Set the command index */
cmdidx = (cmd & MMCSD_CMDIDX_MASK) >> MMCSD_CMDIDX_SHIFT;
regval |= cmdidx;
mcinfo("cmd: %04x arg: %04x regval: %08x\n", cmd, arg, regval);
/* Write the SD card CMD */
lpc54_putreg(SDCARD_RESPDONE_CLEAR | SDCARD_CMDDONE_CLEAR,
LPC54_SDMMC_RINTSTS);
lpc54_ciu_sendcmd(regval, arg);
return OK;
}
/****************************************************************************
* Name: lpc54_blocksetup
*
* Description:
* Configure block size and the number of blocks for next transfer
*
* Input Parameters:
* dev - An instance of the SDIO device interface
* blocklen - The selected block size.
* nblocklen - The number of blocks to transfer
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SDIO_BLOCKSETUP
static void lpc54_blocksetup(struct sdio_dev_s *dev,
unsigned int blocklen, unsigned int nblocks)
{
mcinfo("blocklen=%ld, total transfer=%ld (%ld blocks)\n",
blocklen, blocklen * nblocks, nblocks);
/* Configure block size for next transfer */
lpc54_putreg(blocklen, LPC54_SDMMC_BLKSIZ);
lpc54_putreg(blocklen * nblocks, LPC54_SDMMC_BYTCNT);
}
#endif
/****************************************************************************
* Name: lpc54_recvsetup
*
* Description:
* Setup hardware in preparation for data transfer from the card in non-
* DMA (interrupt driven mode). This method will do whatever controller
* setup is necessary. This would be called for SD memory just BEFORE
* sending CMD13 (SEND_STATUS), CMD17 (READ_SINGLE_BLOCK), CMD18
* (READ_MULTIPLE_BLOCKS), ACMD51 (SEND_SCR), etc. Normally,
* SDCARD_WAITEVENT will be called to receive the indication that the
* transfer is complete.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* buffer - Address of the buffer in which to receive the data
* nbytes - The number of bytes in the transfer
*
* Returned Value:
* Number of bytes sent on success; a negated errno on failure
*
****************************************************************************/
static int lpc54_recvsetup(struct sdio_dev_s *dev, uint8_t *buffer,
size_t nbytes)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
#ifdef CONFIG_LPC54_SDMMC_DMA
uint32_t regval;
#endif
mcinfo("nbytes=%ld\n", (long) nbytes);
DEBUGASSERT(priv != NULL && buffer != NULL && nbytes > 0);
DEBUGASSERT(((uint32_t)buffer & 3) == 0);
/* Save the destination buffer information for use by the interrupt
* handler.
*/
priv->buffer = (uint32_t *)buffer;
priv->remaining = nbytes;
priv->wrdir = false;
#ifdef CONFIG_LPC54_SDMMC_DMA
priv->dmamode = false;
#endif
/* Configure the FIFO so that we will receive the RXDR interrupt whenever
* there are more than 1 words (at least 8 bytes) in the RX FIFO.
*/
lpc54_putreg(SDMMC_FIFOTH_RXWMARK(1), LPC54_SDMMC_FIFOTH);
#ifdef CONFIG_LPC54_SDMMC_DMA
/* Make sure that internal DMA is disabled */
lpc54_putreg(0, LPC54_SDMMC_BMOD);
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval &= ~SDMMC_CTRL_INTDMA;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
#endif
/* Flush ints before we start */
lpc54_putreg(SDCARD_TRANSFER_ALL, LPC54_SDMMC_RINTSTS);
/* Configure the transfer interrupts */
lpc54_config_xfrints(priv, SDCARD_RECV_MASK);
return OK;
}
/****************************************************************************
* Name: lpc54_sendsetup
*
* Description:
* Setup hardware in preparation for data transfer from the card. This
* method will do whatever controller setup is necessary. This would be
* called for SD memory just AFTER sending CMD24 (WRITE_BLOCK), CMD25
* (WRITE_MULTIPLE_BLOCK), ... and before SDCARD_SENDDATA is called.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* buffer - Address of the buffer containing the data to send
* nbytes - The number of bytes in the transfer
*
* Returned Value:
* Number of bytes sent on success; a negated errno on failure
*
****************************************************************************/
static int lpc54_sendsetup(struct sdio_dev_s *dev,
const uint8_t *buffer, size_t nbytes)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
#ifdef CONFIG_LPC54_SDMMC_DMA
uint32_t regval;
#endif
mcinfo("nbytes=%ld\n", (long)nbytes);
DEBUGASSERT(priv != NULL && buffer != NULL && nbytes > 0);
DEBUGASSERT(((uint32_t)buffer & 3) == 0);
/* Save the source buffer information for use by the interrupt handler */
priv->buffer = (uint32_t *)buffer;
priv->remaining = nbytes;
priv->wrdir = true;
#ifdef CONFIG_LPC54_SDMMC_DMA
priv->dmamode = false;
#endif
/* Configure the FIFO so that we will receive the TXDR interrupt whenever
* there the TX FIFO is at least half empty.
*/
lpc54_putreg(SDMMC_FIFOTH_TXWMARK(LPC54_TXFIFO_DEPTH / 2),
LPC54_SDMMC_FIFOTH);
#ifdef CONFIG_LPC54_SDMMC_DMA
/* Make sure that internal DMA is disabled */
lpc54_putreg(0, LPC54_SDMMC_BMOD);
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval &= ~SDMMC_CTRL_INTDMA;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
#endif
/* Flush ints before we start */
lpc54_putreg(SDCARD_TRANSFER_ALL, LPC54_SDMMC_RINTSTS);
/* Configure the transfer interrupts */
lpc54_config_xfrints(priv, SDCARD_SEND_MASK);
return OK;
}
/****************************************************************************
* Name: lpc54_cancel
*
* Description:
* Cancel the data transfer setup of SDCARD_RECVSETUP, SDCARD_SENDSETUP,
* SDCARD_DMARECVSETUP or SDCARD_DMASENDSETUP. This must be called to
* cancel the data transfer setup if, for some reason, you cannot perform
* the transfer.
*
* Input Parameters:
* dev - An instance of the SD card device interface
*
* Returned Value:
* OK is success; a negated errno on failure
*
****************************************************************************/
static int lpc54_cancel(struct sdio_dev_s *dev)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
mcinfo("Cancelling..\n");
/* Disable all transfer- and event- related interrupts */
lpc54_disable_allints(priv);
/* Clearing pending interrupt status on all transfer- and event- related
* interrupts
*/
lpc54_putreg(SDCARD_WAITALL_CLEAR, LPC54_SDMMC_RINTSTS);
/* Cancel any watchdog timeout */
wd_cancel(&priv->waitwdog);
/* Mark no transfer in progress */
priv->remaining = 0;
return OK;
}
/****************************************************************************
* Name: lpc54_waitresponse
*
* Description:
* Poll-wait for the response to the last command to be ready.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* cmd - The command that was sent. See 32-bit command definitions above.
*
* Returned Value:
* OK is success; a negated errno on failure
*
****************************************************************************/
static int lpc54_waitresponse(struct sdio_dev_s *dev, uint32_t cmd)
{
volatile int32_t timeout;
clock_t watchtime;
uint32_t events;
mcinfo("cmd=%04x\n", cmd);
switch (cmd & MMCSD_RESPONSE_MASK)
{
case MMCSD_NO_RESPONSE:
events = SDCARD_CMDDONE_STA;
timeout = SDCARD_CMDTIMEOUT;
break;
case MMCSD_R1_RESPONSE:
case MMCSD_R1B_RESPONSE:
case MMCSD_R2_RESPONSE:
case MMCSD_R6_RESPONSE:
events = (SDCARD_CMDDONE_STA | SDCARD_RESPDONE_STA);
timeout = SDCARD_LONGTIMEOUT;
break;
case MMCSD_R4_RESPONSE:
case MMCSD_R5_RESPONSE:
return -ENOSYS;
case MMCSD_R3_RESPONSE:
case MMCSD_R7_RESPONSE:
events = (SDCARD_CMDDONE_STA | SDCARD_RESPDONE_STA);
timeout = SDCARD_CMDTIMEOUT;
break;
default:
return -EINVAL;
}
mcinfo("cmd: %04x events: %04x STATUS: %08x RINTSTS: %08x\n",
cmd, events, lpc54_getreg(LPC54_SDMMC_STATUS),
lpc54_getreg(LPC54_SDMMC_RINTSTS));
/* Then wait for the response (or timeout or error) */
watchtime = clock_systime_ticks();
while ((lpc54_getreg(LPC54_SDMMC_RINTSTS) & events) != events)
{
if (clock_systime_ticks() - watchtime > timeout)
{
mcerr("ERROR: Timeout cmd: %04x events: %04x STA: %08x "
"RINTSTS: %08x\n",
cmd, events, lpc54_getreg(LPC54_SDMMC_STATUS),
lpc54_getreg(LPC54_SDMMC_RINTSTS));
return -ETIMEDOUT;
}
else if ((lpc54_getreg(LPC54_SDMMC_RINTSTS) & SDCARD_INT_RESPERR) != 0)
{
mcerr("ERROR: SDMMC failure cmd: %04x events: %04x STA: %08x "
"RINTSTS: %08x\n",
cmd, events, lpc54_getreg(LPC54_SDMMC_STATUS),
lpc54_getreg(LPC54_SDMMC_RINTSTS));
return -EIO;
}
}
lpc54_putreg(SDCARD_CMDDONE_CLEAR, LPC54_SDMMC_RINTSTS);
return OK;
}
/****************************************************************************
* Name: lpc54_recv*
*
* Description:
* Receive response to SD card command. Only the critical payload is
* returned -- that is 32 bits for 48 bit status and 128 bits for 136 bit
* status. The driver implementation should verify the correctness of
* the remaining, non-returned bits (CRCs, CMD index, etc.).
*
* Input Parameters:
* dev - An instance of the SD card device interface
* Rx - Buffer in which to receive the response
*
* Returned Value:
* Number of bytes sent on success; a negated errno on failure. Here a
* failure means only a failure to obtain the requested response (due to
* transport problem -- timeout, CRC, etc.). The implementation only
* assures that the response is returned intacta and does not check errors
* within the response itself.
*
****************************************************************************/
static int lpc54_recvshortcrc(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rshort)
{
uint32_t regval;
int ret = OK;
mcinfo("cmd=%04x\n", cmd);
/* R1 Command response (48-bit)
* 47 0 Start bit
* 46 0 Transmission bit (0=from card)
* 45:40 bit5 - bit0 Command index (0-63)
* 39:8 bit31 - bit0 32-bit card status
* 7:1 bit6 - bit0 CRC7
* 0 1 End bit
*
* R1b Identical to R1 with the additional busy signaling via the data
* line.
*
* R6 Published RCA Response (48-bit, SD card only)
* 47 0 Start bit
* 46 0 Transmission bit (0=from card)
* 45:40 bit5 - bit0 Command index (0-63)
* 39:8 bit31 - bit0 32-bit Argument Field, consisting of:
* [31:16] New published RCA of card
* [15:0] Card status bits {23,22,19,12:0}
* 7:1 bit6 - bit0 CRC7
* 0 1 End bit
*/
#ifdef CONFIG_DEBUG_FEATURES
if (!rshort)
{
mcerr("ERROR: rshort=NULL\n");
ret = -EINVAL;
}
/* Check that this is the correct response to this command */
else if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R1_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R1B_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R6_RESPONSE)
{
mcerr("ERROR: Wrong response CMD=%04x\n", cmd);
ret = -EINVAL;
}
else
#endif
{
/* Check if a timeout or CRC error occurred */
regval = lpc54_getreg(LPC54_SDMMC_RINTSTS);
if ((regval & SDMMC_INT_RTO) != 0)
{
mcerr("ERROR: Command timeout: %08x\n", regval);
ret = -ETIMEDOUT;
}
else if ((regval & SDMMC_INT_RCRC) != 0)
{
mcerr("ERROR: CRC failure: %08x\n", regval);
ret = -EIO;
}
}
/* Clear all pending message completion events and return the R1/R6
* response.
*/
lpc54_putreg(SDCARD_RESPDONE_CLEAR | SDCARD_CMDDONE_CLEAR,
LPC54_SDMMC_RINTSTS);
*rshort = lpc54_getreg(LPC54_SDMMC_RESP0);
mcinfo("CRC=%04x\n", *rshort);
return ret;
}
static int lpc54_recvlong(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t rlong[4])
{
uint32_t regval;
int ret = OK;
mcinfo("cmd=%04x\n", cmd);
/* R2 CID, CSD register (136-bit)
* 135 0 Start bit
* 134 0 Transmission bit (0=from card)
* 133:128 bit5 - bit0 Reserved
* 127:1 bit127 - bit1 127-bit CID or CSD register
* (including internal CRC)
* 0 1 End bit
*/
#ifdef CONFIG_DEBUG_FEATURES
/* Check that R1 is the correct response to this command */
if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R2_RESPONSE)
{
mcerr("ERROR: Wrong response CMD=%04x\n", cmd);
ret = -EINVAL;
}
else
#endif
{
/* Check if a timeout or CRC error occurred */
regval = lpc54_getreg(LPC54_SDMMC_RINTSTS);
if (regval & SDMMC_INT_RTO)
{
mcerr("ERROR: Timeout STA: %08x\n", regval);
ret = -ETIMEDOUT;
}
else if (regval & SDMMC_INT_RCRC)
{
mcerr("ERROR: CRC fail STA: %08x\n", regval);
ret = -EIO;
}
}
/* Return the long response */
lpc54_putreg(SDCARD_RESPDONE_CLEAR | SDCARD_CMDDONE_CLEAR,
LPC54_SDMMC_RINTSTS);
if (rlong)
{
rlong[0] = lpc54_getreg(LPC54_SDMMC_RESP3);
rlong[1] = lpc54_getreg(LPC54_SDMMC_RESP2);
rlong[2] = lpc54_getreg(LPC54_SDMMC_RESP1);
rlong[3] = lpc54_getreg(LPC54_SDMMC_RESP0);
}
return ret;
}
static int lpc54_recvshort(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rshort)
{
uint32_t regval;
int ret = OK;
mcinfo("cmd=%04x\n", cmd);
/* R3 OCR (48-bit)
* 47 0 Start bit
* 46 0 Transmission bit (0=from card)
* 45:40 bit5 - bit0 Reserved
* 39:8 bit31 - bit0 32-bit OCR register
* 7:1 bit6 - bit0 Reserved
* 0 1 End bit
*/
/* Check that this is the correct response to this command */
#ifdef CONFIG_DEBUG_FEATURES
if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R3_RESPONSE &&
(cmd & MMCSD_RESPONSE_MASK) != MMCSD_R7_RESPONSE)
{
mcerr("ERROR: Wrong response CMD=%04x\n", cmd);
ret = -EINVAL;
}
else
#endif
{
/* Check if a timeout occurred (Apparently a CRC error can terminate
* a good response)
*/
regval = lpc54_getreg(LPC54_SDMMC_RINTSTS);
if (regval & SDMMC_INT_RTO)
{
mcerr("ERROR: Timeout STA: %08x\n", regval);
ret = -ETIMEDOUT;
}
}
lpc54_putreg(SDCARD_RESPDONE_CLEAR | SDCARD_CMDDONE_CLEAR,
LPC54_SDMMC_RINTSTS);
if (rshort)
{
*rshort = lpc54_getreg(LPC54_SDMMC_RESP0);
}
return ret;
}
/* MMC responses not supported */
static int lpc54_recvnotimpl(struct sdio_dev_s *dev, uint32_t cmd,
uint32_t *rnotimpl)
{
mcinfo("cmd=%04x\n", cmd);
lpc54_putreg(SDCARD_RESPDONE_CLEAR | SDCARD_CMDDONE_CLEAR,
LPC54_SDMMC_RINTSTS);
return -ENOSYS;
}
/****************************************************************************
* Name: lpc54_waitenable
*
* Description:
* Enable/disable of a set of SD card wait events. This is part of the
* the SDCARD_WAITEVENT sequence. The set of to-be-waited-for events is
* configured before calling lpc54_eventwait. This is done in this way
* to help the driver to eliminate race conditions between the command
* setup and the subsequent events.
*
* The enabled events persist until either (1) SDCARD_WAITENABLE is called
* again specifying a different set of wait events, or (2) SDCARD_EVENTWAIT
* returns.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* eventset - A bitset of events to enable or disable (see SDIOWAIT_*
* definitions). 0=disable; 1=enable.
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_waitenable(struct sdio_dev_s *dev,
sdio_eventset_t eventset, uint32_t timeout)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
uint32_t waitmask;
mcinfo("eventset=%04x\n", (unsigned int)eventset);
DEBUGASSERT(priv != NULL);
/* Disable event-related interrupts */
lpc54_config_waitints(priv, 0, 0, 0);
/* Select the interrupt mask that will give us the appropriate wakeup
* interrupts.
*/
waitmask = 0;
if ((eventset & SDIOWAIT_CMDDONE) != 0)
{
waitmask |= SDCARD_CMDDONE_MASK;
}
if ((eventset & SDIOWAIT_RESPONSEDONE) != 0)
{
waitmask |= SDCARD_RESPDONE_MASK;
}
if ((eventset & SDIOWAIT_TRANSFERDONE) != 0)
{
waitmask |= SDCARD_XFRDONE_MASK;
}
/* Enable event-related interrupts */
lpc54_config_waitints(priv, waitmask, eventset, 0);
/* Check if the timeout event is specified in the event set */
if ((priv->waitevents & SDIOWAIT_TIMEOUT) != 0)
{
int delay;
int ret;
/* Yes.. Handle a cornercase: The user request a timeout event but
* with timeout == 0?
*/
if (!timeout)
{
priv->wkupevent = SDIOWAIT_TIMEOUT;
return;
}
/* Start the watchdog timer */
delay = MSEC2TICK(timeout);
ret = wd_start(&priv->waitwdog, delay,
lpc54_eventtimeout, (wdparm_t)priv);
if (ret < 0)
{
mcerr("ERROR: wd_start failed: %d\n", ret);
}
}
}
/****************************************************************************
* Name: lpc54_eventwait
*
* Description:
* Wait for one of the enabled events to occur (or a timeout). Note that
* all events enabled by SDCARD_WAITEVENTS are disabled when
* lpc54_eventwait returns. SDCARD_WAITEVENTS must be called again
* before lpc54_eventwait can be used again.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* timeout - Maximum time in milliseconds to wait. Zero means immediate
* timeout with no wait. The timeout value is ignored if
* SDIOWAIT_TIMEOUT is not included in the waited-for eventset.
*
* Returned Value:
* Event set containing the event(s) that ended the wait. Should always
* be non-zero. All events are disabled after the wait concludes.
*
****************************************************************************/
static sdio_eventset_t lpc54_eventwait(struct sdio_dev_s *dev)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
sdio_eventset_t wkupevent = 0;
irqstate_t flags;
int ret;
mcinfo("timeout=%lu\n", (unsigned long)timeout);
/* There is a race condition here... the event may have completed before
* we get here. In this case waitevents will be zero, but wkupevents will
* be non-zero (and, hopefully, the semaphore count will also be non-zero.
*/
flags = enter_critical_section();
DEBUGASSERT(priv->waitevents != 0 || priv->wkupevent != 0);
/* Loop until the event (or the timeout occurs). Race conditions are
* avoided by calling lpc54_waitenable prior to triggering the logic that
* will cause the wait to terminate. Under certain race conditions, the
* waited-for may have already occurred before this function was called!
*/
for (; ; )
{
/* Wait for an event in event set to occur. If this the event has
* already occurred, then the semaphore will already have been
* incremented and there will be no wait.
*/
ret = nxsem_wait_uninterruptible(&priv->waitsem);
if (ret < 0)
{
/* Task canceled. Cancel the wdog (assuming it was started) and
* return an SDIO error.
*/
wd_cancel(&priv->waitwdog);
leave_critical_section(flags);
return SDIOWAIT_ERROR;
}
wkupevent = priv->wkupevent;
/* Check if the event has occurred. When the event has occurred, then
* evenset will be set to 0 and wkupevent will be set to a nonzero
* value.
*/
if (wkupevent != 0)
{
/* Yes... break out of the loop with wkupevent non-zero */
break;
}
}
/* Disable all transfer- and event- related interrupts */
lpc54_disable_allints(priv);
errout:
leave_critical_section(flags);
mcinfo("wkupevent=%04x\n", wkupevent);
return wkupevent;
}
/****************************************************************************
* Name: lpc54_callbackenable
*
* Description:
* Enable/disable of a set of SD card callback events. This is part of
* the the SD card callback sequence. The set of events is configured to
* enabled callbacks to the function provided in lpc54_registercallback.
*
* Events are automatically disabled once the callback is performed and no
* further callback events will occur until they are again enabled by
* calling this method.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* eventset - A bitset of events to enable or disable (see SDIOMEDIA_*
* definitions). 0=disable; 1=enable.
*
* Returned Value:
* None
*
****************************************************************************/
static void lpc54_callbackenable(struct sdio_dev_s *dev,
sdio_eventset_t eventset)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
mcinfo("eventset: %02x\n", eventset);
DEBUGASSERT(priv != NULL);
priv->cbevents = eventset;
lpc54_callback(priv);
}
/****************************************************************************
* Name: lpc54_registercallback
*
* Description:
* Register a callback that that will be invoked on any media status
* change. Callbacks should not be made from interrupt handlers, rather
* interrupt level events should be handled by calling back on the work
* thread.
*
* When this method is called, all callbacks should be disabled until they
* are enabled via a call to SDCARD_CALLBACKENABLE
*
* Input Parameters:
* dev - Device-specific state data
* callback - The function to call on the media change
* arg - A caller provided value to return with the callback
*
* Returned Value:
* 0 on success; negated errno on failure.
*
****************************************************************************/
static int lpc54_registercallback(struct sdio_dev_s *dev,
worker_t callback, void *arg)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
mcinfo("callback=%p arg=%p\n", callback, arg);
/* Disable callbacks and register this callback and its argument */
mcinfo("Register %p(%p)\n", callback, arg);
DEBUGASSERT(priv != NULL);
priv->cbevents = 0;
priv->cbarg = arg;
priv->callback = callback;
return OK;
}
/****************************************************************************
* Name: lpc54_dmarecvsetup
*
* Description:
* Setup to perform a read DMA. If the processor supports a data cache,
* then this method will also make sure that the contents of the DMA memory
* and the data cache are coherent. For read transfers this may mean
* invalidating the data cache.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* buffer - The memory to DMA from
* buflen - The size of the DMA transfer in bytes
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_LPC54_SDMMC_DMA
static int lpc54_dmarecvsetup(struct sdio_dev_s *dev,
uint8_t *buffer, size_t buflen)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
uint32_t regval;
uint32_t ctrl;
uint32_t maxs;
int i;
/* Don't bother with DMA if the entire transfer will fit in the RX FIFO or
* if we do not have a 4-bit wide bus.
*/
DEBUGASSERT(priv != NULL);
if (buflen <= LPC54_RXFIFO_SIZE || !priv->widebus)
{
return lpc54_recvsetup(dev, buffer, buflen);
}
mcinfo("buffer=%p buflen=%lu\n", buffer, (unsigned long)buflen, buffer);
DEBUGASSERT(buffer != NULL && buflen > 0 && ((uint32_t)buffer & 3) == 0);
/* Reset DMA controller internal registers. The SWR bit automatically
* clears in one clock cycle.
*/
lpc54_putreg(SDMMC_BMOD_SWR, LPC54_SDMMC_BMOD);
/* Save the destination buffer information for use by the interrupt
* handler.
*/
priv->buffer = (uint32_t *)buffer;
priv->remaining = buflen;
priv->wrdir = false;
priv->dmamode = true;
/* Reset the FIFO and DMA */
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval |= SDMMC_CTRL_FIFORESET | SDMMC_CTRL_DMARESET;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
while ((lpc54_getreg(LPC54_SDMMC_CTRL) & (SDMMC_CTRL_FIFORESET |
SDMMC_CTRL_DMARESET)) != 0)
{
}
/* Configure the FIFO so that we will receive the DMA/FIFO requests
* whenever there more than than (FIFO_DEPTH/2) - 1 words in the FIFO.
*/
regval = SDMMC_FIFOTH_RXWMARK(LPC54_RXFIFO_DEPTH / 2 - 1) |
SDMMC_FIFOTH_DMABURST_4XFRS;
lpc54_putreg(regval, LPC54_SDMMC_FIFOTH);
/* Setup DMA list */
i = 0;
while (buflen > 0)
{
/* Limit size of the transfer to maximum buffer size */
maxs = buflen;
if (maxs > MCI_DMADES1_MAXTR)
{
maxs = MCI_DMADES1_MAXTR;
}
buflen -= maxs;
/* Set buffer size */
g_sdmmc_dmadd[i].des1 = MCI_DMADES1_BS1(maxs);
/* Setup buffer address (chained) */
g_sdmmc_dmadd[i].des2 = (uint32_t)priv->buffer +
(i * MCI_DMADES1_MAXTR);
/* Setup basic control */
ctrl = MCI_DMADES0_OWN | MCI_DMADES0_CH;
if (i == 0)
{
ctrl |= MCI_DMADES0_FS; /* First DMA buffer */
}
/* No more data? Then this is the last descriptor */
if (buflen == 0)
{
ctrl |= MCI_DMADES0_LD;
g_sdmmc_dmadd[i].des3 = 0;
}
else
{
ctrl |= MCI_DMADES0_DIC;
g_sdmmc_dmadd[i].des3 = (uint32_t)&g_sdmmc_dmadd[i + 1];
}
g_sdmmc_dmadd[i].des0 = ctrl;
i++;
}
DEBUGASSERT(i < NUM_DMA_DESCRIPTORS);
lpc54_putreg((uint32_t)&g_sdmmc_dmadd[0], LPC54_SDMMC_DBADDR);
/* Flush ints before we start */
lpc54_putreg(SDCARD_TRANSFER_ALL, LPC54_SDMMC_RINTSTS);
/* Enable internal DMA, burst size of 4, fixed burst */
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval |= SDMMC_CTRL_INTDMA;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
regval = SDMMC_BMOD_DE | SDMMC_BMOD_PBL_4XFRS;
lpc54_putreg(regval, LPC54_SDMMC_BMOD);
/* Setup DMA error interrupts */
lpc54_config_dmaints(priv, SDCARD_DMARECV_MASK, SDCARD_DMAERROR_MASK);
return OK;
}
#endif
/****************************************************************************
* Name: lpc54_dmasendsetup
*
* Description:
* Setup to perform a write DMA. If the processor supports a data cache,
* then this method will also make sure that the contents of the DMA memory
* and the data cache are coherent. For write transfers, this may mean
* flushing the data cache.
*
* Input Parameters:
* dev - An instance of the SD card device interface
* buffer - The memory to DMA into
* buflen - The size of the DMA transfer in bytes
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_LPC54_SDMMC_DMA
static int lpc54_dmasendsetup(struct sdio_dev_s *dev,
const uint8_t *buffer, size_t buflen)
{
struct lpc54_dev_s *priv = (struct lpc54_dev_s *)dev;
uint32_t regval;
uint32_t ctrl;
uint32_t maxs;
int i;
/* Don't bother with DMA if the entire transfer will fit in the TX FIFO or
* if we do not have a 4-bit wide bus.
*/
DEBUGASSERT(priv != NULL);
if (buflen <= LPC54_TXFIFO_SIZE || !priv->widebus)
{
return lpc54_sendsetup(dev, buffer, buflen);
}
mcinfo("buflen=%lu\n", (unsigned long)buflen);
DEBUGASSERT(buffer != NULL && buflen > 0 && ((uint32_t)buffer & 3) == 0);
/* Reset DMA controller internal registers. The SWR bit automatically
* clears in one clock cycle.
*/
lpc54_putreg(SDMMC_BMOD_SWR, LPC54_SDMMC_BMOD);
/* Save the destination buffer information for use by the interrupt
* handler.
*/
priv->buffer = (uint32_t *)buffer;
priv->remaining = buflen;
priv->wrdir = true;
priv->dmamode = true;
/* Reset the FIFO and DMA */
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval |= SDMMC_CTRL_FIFORESET | SDMMC_CTRL_DMARESET;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
while ((lpc54_getreg(LPC54_SDMMC_CTRL) & (SDMMC_CTRL_FIFORESET |
SDMMC_CTRL_DMARESET)) != 0)
{
}
/* Configure the FIFO so that we will receive the DMA/FIFO requests
* whenever there are FIFO_DEPTH/2 or fewer words in the FIFO.
*/
regval = SDMMC_FIFOTH_TXWMARK(LPC54_TXFIFO_DEPTH / 2) |
SDMMC_FIFOTH_DMABURST_4XFRS;
lpc54_putreg(regval, LPC54_SDMMC_FIFOTH);
/* Setup DMA descriptor list */
i = 0;
while (buflen > 0)
{
/* Limit size of the transfer to maximum buffer size */
maxs = buflen;
if (maxs > MCI_DMADES1_MAXTR)
{
maxs = MCI_DMADES1_MAXTR;
}
buflen -= maxs;
/* Set buffer size */
g_sdmmc_dmadd[i].des1 = MCI_DMADES1_BS1(maxs);
/* Setup buffer address (chained) */
g_sdmmc_dmadd[i].des2 = (uint32_t)priv->buffer +
(i * MCI_DMADES1_MAXTR);
/* Setup basic control */
ctrl = MCI_DMADES0_OWN | MCI_DMADES0_CH;
if (i == 0)
{
ctrl |= MCI_DMADES0_FS; /* First DMA buffer */
}
/* No more data? Then this is the last descriptor */
if (buflen == 0)
{
ctrl |= MCI_DMADES0_LD;
g_sdmmc_dmadd[i].des3 = 0;
}
else
{
ctrl |= MCI_DMADES0_DIC;
g_sdmmc_dmadd[i].des3 = (uint32_t)&g_sdmmc_dmadd[i + 1];
}
g_sdmmc_dmadd[i].des0 = ctrl;
i++;
}
DEBUGASSERT(i < NUM_DMA_DESCRIPTORS);
lpc54_putreg((uint32_t) &g_sdmmc_dmadd[0], LPC54_SDMMC_DBADDR);
/* Flush ints before we start */
lpc54_putreg(SDCARD_TRANSFER_ALL, LPC54_SDMMC_RINTSTS);
/* Enable internal DMA, burst size of 4, fixed burst */
regval = lpc54_getreg(LPC54_SDMMC_CTRL);
regval |= SDMMC_CTRL_INTDMA;
lpc54_putreg(regval, LPC54_SDMMC_CTRL);
regval = SDMMC_BMOD_DE | SDMMC_BMOD_PBL_4XFRS;
lpc54_putreg(regval, LPC54_SDMMC_BMOD);
/* Setup DMA error interrupts */
lpc54_config_dmaints(priv, SDCARD_DMASEND_MASK, SDCARD_DMAERROR_MASK);
return OK;
}
#endif
/****************************************************************************
* Name: lpc54_callback
*
* Description:
* Perform callback.
*
* Assumptions:
* This function does not execute in the context of an interrupt handler.
* It may be invoked on any user thread or scheduled on the work thread
* from an interrupt handler.
*
****************************************************************************/
static void lpc54_callback(struct lpc54_dev_s *priv)
{
/* Is a callback registered? */
mcinfo("Callback %p(%p) cbevents: %02x cdstatus: %02x\n",
priv->callback, priv->cbarg, priv->cbevents, priv->cdstatus);
if (priv->callback)
{
/* Yes.. Check for enabled callback events */
if ((priv->cdstatus & SDIO_STATUS_PRESENT) != 0)
{
/* Media is present. Is the media inserted event enabled? */
if ((priv->cbevents & SDIOMEDIA_INSERTED) == 0)
{
/* No... return without performing the callback */
return;
}
}
else
{
/* Media is not present. Is the media eject event enabled? */
if ((priv->cbevents & SDIOMEDIA_EJECTED) == 0)
{
/* No... return without performing the callback */
return;
}
}
/* Perform the callback, disabling further callbacks. Of course, the
* the callback can (and probably should) re-enable callbacks.
*/
priv->cbevents = 0;
/* Callbacks cannot be performed in the context of an interrupt
* handler. If we are in an interrupt handler, then queue the
* callback to be performed later on the work thread.
*/
if (up_interrupt_context())
{
/* Yes.. queue it */
mcinfo("Queuing callback to %p(%p)\n",
priv->callback, priv->cbarg);
work_queue(HPWORK, &priv->cbwork, priv->callback,
priv->cbarg, 0);
}
else
{
/* No.. then just call the callback here */
mcinfo("Callback to %p(%p)\n", priv->callback, priv->cbarg);
priv->callback(priv->cbarg);
}
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lpc54_sdmmc_initialize
*
* Description:
* Initialize the SD/MMC peripheral for normal operation.
*
* Input Parameters:
* slotno - Not used.
*
* Returned Value:
* A reference to an SD card interface structure. NULL is returned on
* failures.
*
****************************************************************************/
struct sdio_dev_s *lpc54_sdmmc_initialize(int slotno)
{
struct lpc54_dev_s *priv = &g_scard_dev;
irqstate_t flags;
uint32_t regval;
mcinfo("slotno=%d\n", slotno);
flags = enter_critical_section();
/* Set the SD/MMMC clock source */
lpc54_putreg(BOARD_SDMMC_CLKSRC, LPC54_SYSCON_SDIOCLKSEL);
/* Set up the clock divider to obtain the desired clock rate.
* NOTE: The SDIO function clock to the interface can be up to 50 MHZ.
*/
regval = SYSCON_SDIOCLKDIV_DIV(BOARD_SDMMC_CLKDIV);
lpc54_putreg(regval, LPC54_SYSCON_SDIOCLKDIV);
lpc54_putreg(regval | SYSCON_SDIOCLKDIV_REQFLAG, LPC54_SYSCON_SDIOCLKDIV);
/* Set delay values on the sample and drive inputs and outputs using the
* SDIOCLKCTRL register in the SYSCON block.
*/
regval = SYSCON_SDIOCLKCTRL_DRVPHASE_DEFAULT |
SYSCON_SDIOCLKCTRL_SMPPHASE_DEFAULT |
SYSCON_SDIOCLKCTRL_DRVDLY_DEFAULT |
SYSCON_SDIOCLKCTRL_SMPDLY_DEFAULT;
lpc54_putreg(regval, LPC54_SYSCON_SDIOCLKCTRL);
/* Enable clocking to the SD/MMC peripheral */
lpc54_sdmmc_enableclk();
/* Configure GPIOs for 4-bit, wide-bus operation */
lpc54_gpio_config(GPIO_SD_D0);
#ifndef CONFIG_SDIO_WIDTH_D1_ONLY
lpc54_gpio_config(GPIO_SD_D1);
lpc54_gpio_config(GPIO_SD_D2);
lpc54_gpio_config(GPIO_SD_D3);
#endif
#ifdef CONFIG_MMCSD_HAVE_CARDDETECT
lpc54_gpio_config(GPIO_SD_CARD_DET_N);
#endif
lpc54_gpio_config(GPIO_SD_CLK);
lpc54_gpio_config(GPIO_SD_CMD);
#ifdef CONFIG_LPC54_SDMMC_PWRCTRL
lpc54_gpio_config(GPIO_SD_POW_EN);
#endif
#ifdef CONFIG_MMCSD_HAVE_WRITEPROTECT
lpc54_gpio_config(GPIO_SD_WR_PRT);
#endif
#ifndef CONFIG_SDIO_WIDTH_D1_ONLY
/* REVISIT: Due to chip errata, Rev. 1.7, Issue 3.7, DAT4-7 must also be
* configured. Otherwise the SD interface will not work.
*/
lpc54_gpio_config(GPIO_SD_D4);
lpc54_gpio_config(GPIO_SD_D5);
lpc54_gpio_config(GPIO_SD_D6);
lpc54_gpio_config(GPIO_SD_D7);
#endif
/* Reset the card and assure that it is in the initial, unconfigured
* state.
*/
lpc54_reset(&priv->dev);
leave_critical_section(flags);
return &g_scard_dev.dev;
}
#endif /* CONFIG_LPC54_SDMMC */