/**************************************************************************** * arch/arm/src/kinetis/kinetis_sdhc.c * * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "chip.h" #include "up_arch.h" #include "kinetis_internal.h" #include "kinetis_pinmux.h" #include "kinetis_sim.h" #include "kinetis_sdhc.h" #if CONFIG_KINETIS_SDHC /**************************************************************************** * Pre-Processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ #ifndef CONFIG_SDIO_DMA # warning "Large Non-DMA transfer may result in RX overrun failures" #endif #ifndef CONFIG_SCHED_WORKQUEUE # error "Callback support requires CONFIG_SCHED_WORKQUEUE" #endif #ifndef CONFIG_KINETIS_SDHC_PRIO # define CONFIG_KINETIS_SDHC_PRIO NVIC_SYSH_PRIORITY_DEFAULT #endif #ifndef CONFIG_KINETIS_SDHC_DMAPRIO # define CONFIG_KINETIS_SDHC_DMAPRIO DMA_CCR_PRIMED #endif #if !defined(CONFIG_DEBUG_FS) || !defined(CONFIG_DEBUG_VERBOSE) # undef CONFIG_SDIO_XFRDEBUG #endif /* SDCLK frequencies corresponding to various modes of operation. These * values may be provided in either the NuttX configuration file or in * the board.h file * * NOTE: These settings are not currently used. Since there are only four * frequencies, it makes more sense to just "can" the fixed frequency prescaler * and divider values. */ #if CONFIG_KINETIS_SDHC_ABSFREQ # ifndef CONFIG_KINETIS_IDMODE_FREQ # define CONFIG_KINETIS_IDMODE_FREQ 400000 /* 400 KHz, ID mode */ # endif # ifndef CONFIG_KINETIS_MMCXFR_FREQ # define CONFIG_KINETIS_MMCXFR_FREQ 20000000 /* 20MHz MMC, normal clocking */ # endif # ifndef CONFIG_KINETIS_SD1BIT_FREQ # define CONFIG_KINETIS_SD1BIT_FREQ 20000000 /* 20MHz SD 1-bit, normal clocking */ # endif # ifndef CONFIG_KINETIS_SD4BIT_FREQ # define CONFIG_KINETIS_SD4BIT_FREQ 25000000 /* 25MHz SD 4-bit, normal clocking */ # endif #endif /* Timing */ #define SDHC_CMDTIMEOUT (100000) #define SDHC_LONGTIMEOUT (0x7fffffff) /* Big DVS setting. Range is 0=SDCLK*213 through 14=SDCLK*227 */ #define SDHC_DVS_MAXTIMEOUT (14) #define SDHC_DVS_DATATIMEOUT (14) /* Maximum watermark value */ #define SDHC_MAX_WATERMARK 128 /* Data transfer / Event waiting interrupt mask bits */ #define SDHC_RESPERR_INTS (SDHC_INT_CCE|SDHC_INT_CTOE|SDHC_INT_CEBE|SDHC_INT_CIE) #define SDHC_RESPDONE_INTS (SDHC_RESPERR_INTS|SDHC_INT_CC) #define SCHC_XFRERR_INTS (SDHC_INT_DCE|SDHC_INT_DTOE|SDHC_INT_DEBE) #define SDHC_RCVDONE_INTS (SCHC_XFRERR_INTS|SDHC_INT_BRR|SDHC_INT_TC) #define SDHC_SNDDONE_INTS (SCHC_XFRERR_INTS|SDHC_INT_BWR|SDHC_INT_TC) #define SDHC_XFRDONE_INTS (SCHC_XFRERR_INTS|SDHC_INT_BRR|SDHC_INT_BWR|SDHC_INT_TC) #define SCHC_DMAERR_INTS (SDHC_INT_DCE|SDHC_INT_DTOE|SDHC_INT_DEBE|SDHC_INT_DMAE) #define SDHC_DMADONE_INTS (SCHC_DMAERR_INTS|SDHC_INT_DINT) #define SDHC_WAITALL_INTS (SDHC_RESPDONE_INTS|SDHC_XFRDONE_INTS|SDHC_DMADONE_INTS) /* Register logging support */ #ifdef CONFIG_SDIO_XFRDEBUG # define SAMPLENDX_BEFORE_SETUP 0 # define SAMPLENDX_AFTER_SETUP 1 # define SAMPLENDX_END_TRANSFER 2 # define DEBUG_NSAMPLES 3 #endif /**************************************************************************** * Private Types ****************************************************************************/ /* This structure defines the state of the Kinetis SDIO interface */ struct kinetis_dev_s { struct sdio_dev_s dev; /* Standard, base SDIO interface */ /* Kinetis-specific extensions */ /* Event support */ sem_t waitsem; /* Implements event waiting */ sdio_eventset_t waitevents; /* Set of events to be waited for */ uint32_t waitints; /* Interrupt enables for event waiting */ volatile sdio_eventset_t wkupevent; /* The event that caused the wakeup */ WDOG_ID waitwdog; /* Watchdog that handles event timeouts */ /* Callback support */ uint8_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 */ size_t remaining; /* Number of bytes remaining in the transfer */ uint32_t xfrints; /* Interrupt enables for data transfer */ /* DMA data transfer support */ #ifdef CONFIG_SDIO_DMA volatile uint8_t xfrflags; /* Used to synchronize SDIO and DMA completion events */ #endif }; /* Register logging support */ #ifdef CONFIG_SDIO_XFRDEBUG struct kinetis_sdhcregs_s { /* All read-able SDHC registers */ uint32_t dsaddr; /* DMA System Address Register */ uint32_t blkattr; /* Block Attributes Register */ uint32_t cmdarg; /* Command Argument Register */ uint32_t xferty; /* Transfer Type Register */ uint32_t cmdrsp0; /* Command Response 0 */ uint32_t cmdrsp1; /* Command Response 1 */ uint32_t cmdrsp2; /* Command Response 2 */ uint32_t cmdrsp3; /* Command Response 3 */ uint32_t prsstat; /* Present State Register */ uint32_t proctl; /* Protocol Control Register */ uint32_t sysctl; /* System Control Register */ uint32_t irqstat; /* Interrupt Status Register */ uint32_t irqstaten; /* Interrupt Status Enable Register */ uint32_t irqsigen; /* Interrupt Signal Enable Register */ uint32_t ac12err; /* Auto CMD12 Error Status Register */ uint32_t htcapblt; /* Host Controller Capabilities */ uint32_t wml; /* Watermark Level Register */ uint32_t admaes; /* ADMA Error Status Register */ uint32_t adsaddr; /* ADMA System Address Register */ uint32_t vendor; /* Vendor Specific Register */ uint32_t mmcboot; /* MMC Boot Register */ uint32_t hostver; /* Host Controller Version */ }; #endif /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Low-level helpers ********************************************************/ static void kinetis_takesem(struct kinetis_dev_s *priv); #define kinetis_givesem(priv) (sem_post(&priv->waitsem)) static void kinetis_configwaitints(struct kinetis_dev_s *priv, uint32_t waitints, sdio_eventset_t waitevents, sdio_eventset_t wkupevents); static void kinetis_configxfrints(struct kinetis_dev_s *priv, uint32_t xfrints); /* DMA Helpers **************************************************************/ #ifdef CONFIG_SDIO_XFRDEBUG static void kinetis_sampleinit(void); static void kinetis_sdhcsample(struct kinetis_sdhcregs_s *regs); static void kinetis_sample(struct kinetis_dev_s *priv, int index); static void kinetis_dumpsample(struct kinetis_dev_s *priv, struct kinetis_sdhcregs_s *regs, const char *msg); static void kinetis_dumpsamples(struct kinetis_dev_s *priv); static void kinetis_showregs(struct kinetis_dev_s *priv, const char *msg); #else # define kinetis_sampleinit() # define kinetis_sample(priv,index) # define kinetis_dumpsamples(priv) # define kinetis_showregs(priv,msg) #endif /* Data Transfer Helpers ****************************************************/ static void kinetis_dataconfig(struct kinetis_dev_s *priv, bool bwrite, unsigned int blocksize, unsigned int nblocks, unsigned int timeout); static void kinetis_datadisable(void); #ifndef CONFIG_SDIO_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); /* Interrupt Handling *******************************************************/ static int kinetis_interrupt(int irq, void *context); /* SDIO interface methods ***************************************************/ /* Mutual exclusion */ #ifdef CONFIG_SDIO_MUXBUS static int kinetis_lock(FAR struct sdio_dev_s *dev, bool lock); #endif /* Initialization/setup */ static void kinetis_reset(FAR struct sdio_dev_s *dev); static uint8_t kinetis_status(FAR struct sdio_dev_s *dev); static void kinetis_widebus(FAR struct sdio_dev_s *dev, bool enable); #if CONFIG_KINETIS_SDHC_ABSFREQ static void kinetis_frequency(FAR struct sdio_dev_s *dev, uint32_t frequency); #endif static void kinetis_clock(FAR struct sdio_dev_s *dev, enum sdio_clock_e rate); static int kinetis_attach(FAR struct sdio_dev_s *dev); /* Command/Status/Data Transfer */ static int kinetis_sendcmd(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t arg); #ifndef CONFIG_SDIO_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); static int kinetis_recvshortcrc(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rshort); static int kinetis_recvlong(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t rlong[4]); static int kinetis_recvshort(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rshort); static int kinetis_recvnotimpl(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rnotimpl); /* EVENT handler */ static void kinetis_waitenable(FAR struct sdio_dev_s *dev, sdio_eventset_t eventset); static sdio_eventset_t kinetis_eventwait(FAR struct sdio_dev_s *dev, uint32_t timeout); static void kinetis_callbackenable(FAR struct sdio_dev_s *dev, sdio_eventset_t eventset); static int kinetis_registercallback(FAR struct sdio_dev_s *dev, worker_t callback, void *arg); /* DMA */ #ifdef CONFIG_SDIO_DMA static bool kinetis_dmasupported(FAR struct sdio_dev_s *dev); static int kinetis_dmarecvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer, size_t buflen); static int kinetis_dmasendsetup(FAR struct sdio_dev_s *dev, FAR const uint8_t *buffer, size_t buflen); #endif /* Initialization/uninitialization/reset ************************************/ static void kinetis_callback(void *arg); /**************************************************************************** * Private Data ****************************************************************************/ struct kinetis_dev_s g_sdhcdev = { .dev = { #ifdef CONFIG_SDIO_MUXBUS .lock = kinetis_lock, #endif .reset = kinetis_reset, .status = kinetis_status, .widebus = kinetis_widebus, .clock = kinetis_clock, .attach = kinetis_attach, .sendcmd = kinetis_sendcmd, #ifndef CONFIG_SDIO_DMA .recvsetup = kinetis_recvsetup, .sendsetup = kinetis_sendsetup, #else .recvsetup = kinetis_dmarecvsetup, .sendsetup = kinetis_dmasendsetup, #endif .cancel = kinetis_cancel, .waitresponse = kinetis_waitresponse, .recvR1 = kinetis_recvshortcrc, .recvR2 = kinetis_recvlong, .recvR3 = kinetis_recvshort, .recvR4 = kinetis_recvnotimpl, .recvR5 = kinetis_recvnotimpl, .recvR6 = kinetis_recvshortcrc, .recvR7 = kinetis_recvshort, .waitenable = kinetis_waitenable, .eventwait = kinetis_eventwait, .callbackenable = kinetis_callbackenable, .registercallback = kinetis_registercallback, #ifdef CONFIG_SDIO_DMA .dmasupported = kinetis_dmasupported, .dmarecvsetup = kinetis_dmarecvsetup, .dmasendsetup = kinetis_dmasendsetup, #endif }, }; /* Register logging support */ #ifdef CONFIG_SDIO_XFRDEBUG static struct kinetis_sdhcregs_s g_sampleregs[DEBUG_NSAMPLES]; #endif /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Low-level Helpers ****************************************************************************/ /**************************************************************************** * Name: kinetis_takesem * * Description: * Take the wait semaphore (handling false alarm wakeups due to the receipt * of signals). * * Input Parameters: * dev - Instance of the SDIO device driver state structure. * * Returned Value: * None * ****************************************************************************/ static void kinetis_takesem(struct kinetis_dev_s *priv) { /* Take the semaphore (perhaps waiting) */ while (sem_wait(&priv->waitsem) != 0) { /* The only case that an error should occr here is if the wait was * awakened by a signal. */ ASSERT(errno == EINTR); } } /**************************************************************************** * Name: kinetis_configwaitints * * Description: * Enable/disable SDIO interrupts needed to suport the wait function * * Input Parameters: * priv - A reference to the SDIO device state structure * waitints - The set of bits in the SDIO MASK register to set * waitevents - Waited for events * wkupevent - Wake-up events * * Returned Value: * None * ****************************************************************************/ static void kinetis_configwaitints(struct kinetis_dev_s *priv, uint32_t waitints, sdio_eventset_t waitevents, sdio_eventset_t wkupevent) { irqstate_t flags; /* Save all of the data and set the new interrupt mask in one, atomic * operation. */ flags = irqsave(); priv->waitevents = waitevents; priv->wkupevent = wkupevent; priv->waitints = waitints; #ifdef CONFIG_SDIO_DMA priv->xfrflags = 0; #endif putreg32(priv->xfrints | priv->waitints | SDHC_INT_CINT, KINETIS_SDHC_IRQSIGEN); irqrestore(flags); } /**************************************************************************** * Name: kinetis_configxfrints * * Description: * Enable SDIO interrupts needed to support the data transfer event * * Input Parameters: * priv - A reference to the SDIO device state structure * xfrints - The set of bits in the SDIO MASK register to set * * Returned Value: * None * ****************************************************************************/ static void kinetis_configxfrints(struct kinetis_dev_s *priv, uint32_t xfrints) { irqstate_t flags; flags = irqsave(); priv->xfrints = xfrints; putreg32(priv->xfrints | priv->waitints | SDHC_INT_CINT, KINETIS_SDHC_IRQSIGEN); irqrestore(flags); } /**************************************************************************** * DMA Helpers ****************************************************************************/ /**************************************************************************** * Name: kinetis_sampleinit * * Description: * Setup prior to collecting DMA samples * ****************************************************************************/ #ifdef CONFIG_SDIO_XFRDEBUG static void kinetis_sampleinit(void) { memset(g_sampleregs, 0xff, DEBUG_NSAMPLES * sizeof(struct kinetis_sdhcregs_s)); } #endif /**************************************************************************** * Name: kinetis_sdhcsample * * Description: * Sample SDIO registers * ****************************************************************************/ #ifdef CONFIG_SDIO_XFRDEBUG static void kinetis_sdhcsample(struct kinetis_sdhcregs_s *regs) { regs->dsaddr = getreg32(KINETIS_SDHC_DSADDR); /* DMA System Address Register */ regs->blkattr = getreg32(KINETIS_SDHC_BLKATTR); /* Block Attributes Register */ regs->cmdarg = getreg32(KINETIS_SDHC_CMDARG); /* Command Argument Register */ regs->xferty = getreg32(KINETIS_SDHC_XFERTYP); /* Transfer Type Register */ regs->cmdrsp0 = getreg32(KINETIS_SDHC_CMDRSP0); /* Command Response 0 */ regs->cmdrsp1 = getreg32(KINETIS_SDHC_CMDRSP1); /* Command Response 1 */ regs->cmdrsp2 = getreg32(KINETIS_SDHC_CMDRSP2); /* Command Response 2 */ regs->cmdrsp3 = getreg32(KINETIS_SDHC_CMDRSP3); /* Command Response 3 */ regs->prsstat = getreg32(KINETIS_SDHC_PRSSTAT); /* Present State Register */ regs->proctl = getreg32(KINETIS_SDHC_PROCTL); /* Protocol Control Register */ regs->sysctl = getreg32(KINETIS_SDHC_SYSCTL); /* System Control Register */ regs->irqstat = getreg32(KINETIS_SDHC_IRQSTAT); /* Interrupt Status Register */ regs->irqstaten = getreg32(KINETIS_SDHC_IRQSTATEN); /* Interrupt Status Enable Register */ regs->irqsigen = getreg32(KINETIS_SDHC_IRQSIGEN); /* Interrupt Signal Enable Register */ regs->ac12err = getreg32(KINETIS_SDHC_AC12ERR); /* Auto CMD12 Error Status Register */ regs->htcapblt = getreg32(KINETIS_SDHC_HTCAPBLT); /* Host Controller Capabilities */ regs->wml = getreg32(KINETIS_SDHC_WML); /* Watermark Level Register */ regs->admaes = getreg32(KINETIS_SDHC_ADMAES); /* ADMA Error Status Register */ regs->adsaddr = getreg32(KINETIS_SDHC_ADSADDR); /* ADMA System Address Register */ regs->vendor = getreg32(KINETIS_SDHC_VENDOR); /* Vendor Specific Register */ regs->mmcboot = getreg32(KINETIS_SDHC_MMCBOOT); /* MMC Boot Register */ regs->hostver = getreg32(KINETIS_SDHC_HOSTVER); /* Host Controller Version */ } #endif /**************************************************************************** * Name: kinetis_sample * * Description: * Sample SDIO/DMA registers * ****************************************************************************/ #ifdef CONFIG_SDIO_XFRDEBUG static void kinetis_sample(struct kinetis_dev_s *priv, int index) { kinetis_sdhcsample(&g_sampleregs[index]); } #endif /**************************************************************************** * Name: kinetis_dumpsample * * Description: * Dump one register sample * ****************************************************************************/ #ifdef CONFIG_SDIO_XFRDEBUG static void kinetis_dumpsample(struct kinetis_dev_s *priv, struct kinetis_sdhcregs_s *regs, const char *msg) { fdbg("SDHC Registers: %s\n", msg); fdbg(" DSADDR[%08x]: %08x\n", KINETIS_SDHC_DSADDR, regs->dsaddr); fdbg(" BLKATTR[%08x]: %08x\n", KINETIS_SDHC_BLKATTR, regs->blkattr); fdbg(" CMDARG[%08x]: %08x\n", KINETIS_SDHC_CMDARG, regs->cmdarg); fdbg(" XFERTY[%08x]: %08x\n", KINETIS_SDHC_XFERTYP, regs->xferty); fdbg(" CMDRSP0[%08x]: %08x\n", KINETIS_SDHC_CMDRSP0, regs->cmdrsp0); fdbg(" CMDRSP1[%08x]: %08x\n", KINETIS_SDHC_CMDRSP1, regs->cmdrsp1); fdbg(" CMDRSP2[%08x]: %08x\n", KINETIS_SDHC_CMDRSP2, regs->cmdrsp2); fdbg(" CMDRSP3[%08x]: %08x\n", KINETIS_SDHC_CMDRSP3, regs->cmdrsp3); fdbg(" PRSSTAT[%08x]: %08x\n", KINETIS_SDHC_PRSSTAT, regs->prsstat); fdbg(" PROCTL[%08x]: %08x\n", KINETIS_SDHC_PROCTL, regs->proctl); fdbg(" SYSCTL[%08x]: %08x\n", KINETIS_SDHC_SYSCTL, regs->sysctl); fdbg(" IRQSTAT[%08x]: %08x\n", KINETIS_SDHC_IRQSTAT, regs->irqstat); fdbg("IRQSTATEN[%08x]: %08x\n", KINETIS_SDHC_IRQSTATEN, regs->irqstaten); fdbg(" IRQSIGEN[%08x]: %08x\n", KINETIS_SDHC_IRQSIGEN, regs->irqsigen); fdbg(" AC12ERR[%08x]: %08x\n", KINETIS_SDHC_AC12ERR, regs->ac12err); fdbg(" HTCAPBLT[%08x]: %08x\n", KINETIS_SDHC_HTCAPBLT, regs->htcapblt); fdbg(" WML[%08x]: %08x\n", KINETIS_SDHC_WML, regs->wml); fdbg(" ADMAES[%08x]: %08x\n", KINETIS_SDHC_ADMAES, regs->admaes); fdbg(" ADSADDR[%08x]: %08x\n", KINETIS_SDHC_ADSADDR, regs->adsaddr); fdbg(" VENDOR[%08x]: %08x\n", KINETIS_SDHC_VENDOR, regs->vendor); fdbg(" MMCBOOT[%08x]: %08x\n", KINETIS_SDHC_MMCBOOT, regs->mmcboot); fdbg(" HOSTVER[%08x]: %08x\n", KINETIS_SDHC_HOSTVER, regs->hostver); } #endif /**************************************************************************** * Name: kinetis_dumpsamples * * Description: * Dump all sampled register data * ****************************************************************************/ #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"); } #endif /**************************************************************************** * Name: kinetis_showregs * * Description: * Dump the current state of all registers * ****************************************************************************/ #ifdef CONFIG_SDIO_XFRDEBUG static void kinetis_showregs(struct kinetis_dev_s *priv, const char *msg) { struct kinetis_sdhcregs_s regs; kinetis_sdhcsample(®s); kinetis_dumpsample(priv, ®s, msg); } #endif /**************************************************************************** * Data Transfer Helpers ****************************************************************************/ /**************************************************************************** * Name: kinetis_dataconfig * * Description: * Configure the SDIO data path for the next data transfer * ****************************************************************************/ static void kinetis_dataconfig(struct kinetis_dev_s *priv, bool bwrite, unsigned int blocksize, unsigned int nblocks, unsigned int timeout) { unsigned int watermark; uint32_t regval = 0; /* Set the data timeout value in the SDHC_SYSCTL field to the selected value */ regval = getreg32(KINETIS_SDHC_SYSCTL); regval &= ~SDHC_SYSCTL_DVS_MASK; regval |= timeout << SDHC_SYSCTL_DVS_SHIFT; putreg32(regval, KINETIS_SDHC_SYSCTL); /* Set the block size and count in the SDHC_BLKATTR register. The block * size is only valid for multiple block transfers. */ regval = blocksize << SDHC_BLKATTR_SIZE_SHIFT | nblocks << SDHC_BLKATTR_CNT_SHIFT; putreg32(regval, KINETIS_SDHC_BLKATTR); /* Set the watermark level */ #ifdef CONFIG_SDIO_DMA /* Set the Read Watermark Level to the blocksize to be read * (limited to half of the maximum watermark value). BRR will be * set when the number of queued words is greater than or equal * to this value. */ watermark = (blocksize + 3) >> 2; if (watermark > (SDHC_MAX_WATERMARK / 2)) { watermark = (SDHC_MAX_WATERMARK / 2); } /* When the watermark level requirement is met in data transfer, and the * internal DMA is enabled, the data buffer block sends a DMA request to * the crossbar switch interface. */ if (bwrite) { /* The SDHC will not start data transmission until the number of * words set in the WML register can be held in the buffer. If the * buffer is empty and the host system does not write data in time, * the SDHC will stop the SD_CLK to avoid the data buffer under-run * situation. */ putreg32(watermark << SDHC_WML_WR_SHIFT, KINETIS_SDHC_WML); } else { /* The SDHC will not start data transmission until the number of * words set in the WML register are in the buffer. If the buffer * is full and the Host System does not read data in time, the * SDHC will stop the SDHC_DCLK to avoid the data buffer over-run * situation. */ putreg32(watermark << SDHC_WML_RD_SHIFT, KINETIS_SDHC_WML); } #else if (bwrite) { /* Write Watermark Level = 0: BWR will be set when the number of * queued words is less than or equal to 0. */ putreg32(0, KINETIS_SDHC_WML); } else { /* Set the Read Watermark Level to the blocksize to be read * (limited to half of the maximum watermark value). BRR will be * set when the number of queued words is greater than or equal * to this value. */ watermark = (blocksize + 3) >> 2; if (watermark > (SDHC_MAX_WATERMARK / 2)) { watermark = (SDHC_MAX_WATERMARK / 2); } putreg32(watermark << SDHC_WML_RD_SHIFT, KINETIS_SDHC_WML); } #endif } /**************************************************************************** * Name: kinetis_datadisable * * Description: * Disable the SDIO data path setup by kinetis_dataconfig() and * disable DMA. * ****************************************************************************/ static void kinetis_datadisable(void) { uint32_t regval; /* Set the data timeout value in the SDHC_SYSCTL field to the maximum value */ regval = getreg32(KINETIS_SDHC_SYSCTL); regval &= ~SDHC_SYSCTL_DVS_MASK; regval |= SDHC_DVS_MAXTIMEOUT << SDHC_SYSCTL_DVS_SHIFT; putreg32(regval, KINETIS_SDHC_SYSCTL); /* Set the block size to zero (no transfer) */ putreg32(0, KINETIS_SDHC_BLKATTR); } /**************************************************************************** * Name: kinetis_transmit * * Description: * Send SDIO data in interrupt mode * * Input Parameters: * priv - An instance of the SDIO device interface * * Returned Value: * None * ****************************************************************************/ #ifndef CONFIG_SDIO_DMA static void kinetis_transmit(struct kinetis_dev_s *priv) { union { uint32_t w; uint8_t b[4]; } data; /* Loop while there is more data to be sent, waiting for buffer write * ready (BWR) */ fllvdbg("Entry: remaining: %d IRQSTAT: %08x\n", priv->remaining, getreg32(KINETIS_SDHC_IRQSTAT)); while (priv->remaining > 0 && (getreg32(KINETIS_SDHC_IRQSTAT) & SDHC_INT_BWR) != 0) { /* Clear BWR. If there is more data in the buffer, writing to the * buffer should reset BRR. */ putreg32(SDHC_INT_BWR, KINETIS_SDHC_IRQSTAT); /* Is there a full word remaining in the user buffer? */ if (priv->remaining >= sizeof(uint32_t)) { /* Yes, transfer the word to the TX FIFO */ data.w = *priv->buffer++; priv->remaining -= sizeof(uint32_t); } else { /* No.. transfer just the bytes remaining in the user buffer, * padding with zero as necessary to extend to a full word. */ uint8_t *ptr = (uint8_t *)priv->remaining; int i; data.w = 0; for (i = 0; i < priv->remaining; i++) { data.b[i] = *ptr++; } /* Now the transfer is finished */ priv->remaining = 0; } /* Put the word in the FIFO */ putreg32(data.w, KINETIS_SDHC_DATPORT); } fllvdbg("Exit: remaining: %d IRQSTAT: %08x\n", priv->remaining, getreg32(KINETIS_SDHC_IRQSTAT)); } #endif /**************************************************************************** * Name: kinetis_receive * * Description: * Receive SDIO data in interrupt mode * * Input Parameters: * priv - An instance of the SDIO device interface * * Returned Value: * None * ****************************************************************************/ #ifndef CONFIG_SDIO_DMA static void kinetis_receive(struct kinetis_dev_s *priv) { unsigned int watermark; union { uint32_t w; uint8_t b[4]; } data; /* Set the Read Watermark Level to 1: BRR will be set when the number of * queued words is greater than or equal to 1. */ putreg32(1 << SDHC_WML_RD_SHIFT, KINETIS_SDHC_WML); /* Loop while there is space to store the data, waiting for buffer read * ready (BRR) */ fllvdbg("Entry: remaining: %d IRQSTAT: %08x\n", priv->remaining, getreg32(KINETIS_SDHC_IRQSTAT)); while (priv->remaining > 0 && (getreg32(KINETIS_SDHC_IRQSTAT) & SDHC_INT_BRR) != 0) { /* Clear BRR. If there is more data in the buffer, reading from the * buffer should reset BRR. */ putreg32(SDHC_INT_BRR, KINETIS_SDHC_IRQSTAT); /* Read the next word from the RX buffer */ data.w = getreg32(KINETIS_SDHC_DATPORT); if (priv->remaining >= sizeof(uint32_t)) { /* Transfer the whole word to the user buffer */ *priv->buffer++ = data.w; priv->remaining -= sizeof(uint32_t); } else { /* Transfer any trailing fractional word */ uint8_t *ptr = (uint8_t*)priv->buffer; int i; for (i = 0; i < priv->remaining; i++) { *ptr++ = data.b[i]; } /* Now the transfer is finished */ priv->remaining = 0; } } /* Set the Read Watermark Level either the number of remaining words to be * read (limited to half of the maximum watermark value) */ watermark = ((priv->remaining + 3) >> 2); if (watermark > (SDHC_MAX_WATERMARK / 2)) { watermark = (SDHC_MAX_WATERMARK / 2); } putreg32(watermark << SDHC_WML_RD_SHIFT, KINETIS_SDHC_WML); fllvdbg("Exit: remaining: %d IRQSTAT: %08x WML: %08x\n", priv->remaining, getreg32(KINETIS_SDHC_IRQSTAT), getreg32(KINETIS_SDHC_WML)); } #endif /**************************************************************************** * Name: kinetis_eventtimeout * * Description: * The watchdog timeout setup when the event wait start has expired without * any other waited-for event occurring. * * Input Parameters: * argc - The number of arguments (should be 1) * arg - The argument (state structure reference cast to uint32_t) * * Returned Value: * None * * Assumptions: * Always called from the interrupt level with interrupts disabled. * ****************************************************************************/ static void kinetis_eventtimeout(int argc, uint32_t arg) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)arg; DEBUGASSERT(argc == 1 && priv != NULL); DEBUGASSERT((priv->waitevents & SDIOWAIT_TIMEOUT) != 0); /* Is a data transfer complete event expected? */ if ((priv->waitevents & SDIOWAIT_TIMEOUT) != 0) { /* Yes.. Sample registers at the time of the timeout */ kinetis_sample(priv, SAMPLENDX_END_TRANSFER); /* Wake up any waiting threads */ kinetis_endwait(priv, SDIOWAIT_TIMEOUT); flldbg("Timeout: remaining: %d\n", priv->remaining); } } /**************************************************************************** * Name: kinetis_endwait * * Description: * Wake up a waiting thread if the waited-for event has occurred. * * Input Parameters: * priv - An instance of the SDIO 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 kinetis_endwait(struct kinetis_dev_s *priv, sdio_eventset_t wkupevent) { /* Cancel the watchdog timeout */ (void)wd_cancel(priv->waitwdog); /* Disable event-related interrupts */ kinetis_configwaitints(priv, 0, 0, wkupevent); /* Wake up the waiting thread */ kinetis_givesem(priv); } /**************************************************************************** * Name: kinetis_endtransfer * * Description: * Terminate a transfer with the provided status. This function is called * only from the SDIO interrupt handler when end-of-transfer conditions * are detected. * * Input Parameters: * priv - An instance of the SDIO 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 kinetis_endtransfer(struct kinetis_dev_s *priv, sdio_eventset_t wkupevent) { #ifdef CONFIG_SDIO_DMA uint32_t regval; #endif /* Disable all transfer related interrupts */ kinetis_configxfrints(priv, 0); /* Clearing pending interrupt status on all transfer related interrupts */ putreg32(SDHC_XFRDONE_INTS, KINETIS_SDHC_IRQSTAT); /* If this was a DMA transfer, make sure that DMA is stopped */ #ifdef CONFIG_SDIO_DMA /* Stop the DMA by resetting the data path*/ regval = getreg32(KINETIS_SDHC_SYSCTL); regval |= SDHC_SYSCTL_RSTD; putreg32(regval, KINETIS_SDHC_SYSCTL); #endif /* Mark the transfer finished */ priv->remaining = 0; /* Debug instrumentation */ kinetis_sample(priv, SAMPLENDX_END_TRANSFER); /* Is a thread wait for these data transfer complete events? */ if ((priv->waitevents & wkupevent) != 0) { /* Yes.. wake up any waiting threads */ kinetis_endwait(priv, wkupevent); } } /**************************************************************************** * Interrupt Handling ****************************************************************************/ /**************************************************************************** * Name: kinetis_interrupt * * Description: * SDIO interrupt handler * * Input Parameters: * dev - An instance of the SDIO device interface * * Returned Value: * None * ****************************************************************************/ static int kinetis_interrupt(int irq, void *context) { struct kinetis_dev_s *priv = &g_sdhcdev; uint32_t enabled; uint32_t pending; uint32_t regval; /* Check the SDHC IRQSTAT 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 IRQSTAT and IRQSIGEN registers). If * there are non-zero bits remaining, then we have work to do here. */ regval = getreg32(KINETIS_SDHC_IRQSIGEN); enabled = getreg32(KINETIS_SDHC_IRQSTAT) & regval; fllvdbg("IRQSTAT: %08x IRQSIGEN %08x enabled: %08x\n", getreg32(KINETIS_SDHC_IRQSTAT), regval, enabled); /* Disable card interrupts to clear the card interrupt to the host system. */ regval &= ~SDHC_INT_CINT; putreg32(regval, KINETIS_SDHC_IRQSIGEN); /* Clear all pending interrupts */ putreg32(enabled, KINETIS_SDHC_IRQSTAT); /* Handle in progress, interrupt driven data transfers ********************/ pending = enabled & priv->xfrints; if (pending != 0) { #ifndef CONFIG_SDIO_DMA /* Is the RX buffer read ready? Is so then we must be processing a * non-DMA receive transaction. */ if ((pending & SDHC_INT_BRR) != 0) { /* Receive data from the RX buffer */ kinetis_receive(priv); } /* Otherwise, Is the TX buffer write ready? If so we must * be processing a non-DMA send transaction. NOTE: We can't be * processing both! */ else if ((pending & SDHC_INT_BWR) != 0) { /* Send data via the TX FIFO */ kinetis_transmit(priv); } #endif /* Handle transfer complete events */ if ((pending & SDHC_INT_TC) != 0) { /* Terminate the transfer */ kinetis_endtransfer(priv, SDIOWAIT_TRANSFERDONE); } /* Handle data block send/receive CRC failure */ else if ((pending & SDHC_INT_DCE) != 0) { /* Terminate the transfer with an error */ flldbg("ERROR: Data block CRC failure, remaining: %d\n", priv->remaining); kinetis_endtransfer(priv, SDIOWAIT_TRANSFERDONE|SDIOWAIT_ERROR); } /* Handle data timeout error */ else if ((pending & SDHC_INT_DTOE) != 0) { /* Terminate the transfer with an error */ flldbg("ERROR: Data timeout, remaining: %d\n", priv->remaining); kinetis_endtransfer(priv, SDIOWAIT_TRANSFERDONE|SDIOWAIT_TIMEOUT); } } /* Handle wait events *****************************************************/ pending = enabled & priv->waitints; if (pending != 0) { /* Is this a response completion event? */ if ((pending & SDHC_RESPDONE_INTS) != 0) { /* Yes.. Is their a thread waiting for response done? */ if ((priv->waitevents & (SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE)) != 0) { /* Yes.. mask further interrupts and wake the thread up */ regval = getreg32(KINETIS_SDHC_IRQSIGEN); regval &= ~SDHC_RESPDONE_INTS; putreg32(regval, KINETIS_SDHC_IRQSIGEN); kinetis_endwait(priv, SDIOWAIT_RESPONSEDONE); } } } /* Re-enable card interrupts */ regval = getreg32(KINETIS_SDHC_IRQSIGEN); regval |= SDHC_INT_CINT; putreg32(regval, KINETIS_SDHC_IRQSIGEN); 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. * * Input Parameters: * dev - An instance of the SDIO 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 kinetis_lock(FAR struct sdio_dev_s *dev, bool lock) { /* Single SDIO instance so there is only one possibility. The multiplex * bus is part of board support package. */ kinetis_muxbus_sdio_lock(lock); return OK; } #endif /**************************************************************************** * Name: kinetis_reset * * Description: * Reset the SDIO controller. Undo all setup and initialization. * * Input Parameters: * dev - An instance of the SDIO device interface * * Returned Value: * None * ****************************************************************************/ static void kinetis_reset(FAR struct sdio_dev_s *dev) { FAR struct kinetis_dev_s *priv = (FAR struct kinetis_dev_s *)dev; uint32_t regval; /* Disable all interrupts so that nothing interferes with the following. */ putreg32(0, KINETIS_SDHC_IRQSIGEN); /* Reset the SDHC block, putting registers in their default, reset state. * Initiate the reset by setting the RSTA bit in the SYSCTL register. */ regval = getreg32(KINETIS_SDHC_SYSCTL); regval |= SDHC_SYSCTL_RSTA; putreg32(regval, KINETIS_SDHC_SYSCTL); /* The SDHC will reset the RSTA bit to 0 when the capabilities * registers are valid and the host driver can read them. */ while ((getreg32(KINETIS_SDHC_SYSCTL) & SDHC_SYSCTL_RSTA) != 0); /* Make sure that all clocking is disabled */ kinetis_clock(dev, CLOCK_SDIO_DISABLED); /* Enable all status bits (these could not all be potential sources of * interrupts. */ putreg32(SDHC_INT_ALL, KINETIS_SDHC_IRQSTATEN); fvdbg("SYSCTL: %08x PRSSTAT: %08x IRQSTATEN: %08x\n", getreg32(KINETIS_SDHC_SYSCTL), getreg32(KINETIS_SDHC_PRSSTAT), getreg32(KINETIS_SDHC_IRQSTATEN)); /* The next phase of the hardware reset would be to set the SYSCTRL INITA * bit to send 80 clock ticks for card to power up and then reset the card * with CMD0. This is done elsewhere. */ /* Reset state data */ priv->waitevents = 0; /* Set of events to be waited for */ priv->waitints = 0; /* Interrupt enables for event waiting */ priv->wkupevent = 0; /* The event that caused the wakeup */ #ifdef CONFIG_SDIO_DMA priv->xfrflags = 0; /* Used to synchronize SDIO and DMA completion events */ #endif 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->xfrints = 0; /* Interrupt enables for data transfer */ } /**************************************************************************** * Name: kinetis_status * * Description: * Get SDIO status. * * Input Parameters: * dev - Device-specific state data * * Returned Value: * Returns a bitset of status values (see kinetis_status_* defines) * ****************************************************************************/ static uint8_t kinetis_status(FAR struct sdio_dev_s *dev) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev; return priv->cdstatus; } /**************************************************************************** * Name: kinetis_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 SDIO device interface * wide - true: wide bus (4-bit) bus mode enabled * * Returned Value: * None * ****************************************************************************/ static void kinetis_widebus(FAR struct sdio_dev_s *dev, bool wide) { uint32_t regval; /* Set the Data Transfer Width (DTW) field in the PROCTL register */ regval = getreg32(KINETIS_SDHC_PROCTL); regval &= ~SDHC_PROCTL_DTW_MASK; if (wide) { regval |= SDHC_PROCTL_DTW_4BIT; } else { regval |= SDHC_PROCTL_DTW_1BIT; } putreg32(regval, KINETIS_SDHC_PROCTL); } /**************************************************************************** * Name: kinetis_frequency * * Description: * Set the SD clock frequency * * Input Parameters: * dev - An instance of the SDIO device interface * frequency - The frequency to use * * Returned Value: * None * ****************************************************************************/ #if CONFIG_KINETIS_SDHC_ABSFREQ static void kinetis_frequency(FAR struct sdio_dev_s *dev, uint32_t frequency) { uint32_t sdclkfs; uint32_t prescaled; uint32_t regval; unsigned int prescaler; unsigned int divisor; /* The SDCLK frequency is determined by (1) the frequency of the base clock * that was selected as the input clock, and (2) by a prescaler and a * divisor that are selected here: * * SDCLK frequency = (base clock) / (prescaler * divisor) * * The prescaler is avalable only for the values: 2, 4, 8, 16, 32, 64, 128, * and 256. Pick the smallest value of SDCLKFS that would result in an * in-range frequency. * * For example, if the base clock frequency is 96 MHz, and the target * frequency is 25 MHz, the following logic will select prescaler. * * 96MHz / 2 <= 25MHz <= 96MHz / 2 /16 -- YES, prescaler == 2 * * If the target frequency is 400 kHz, the following logic will select * prescaler: * * 96MHz / 2 <= 400KHz <= 96MHz / 2 / 16 -- NO * 96MHz / 4 <= 400KHz <= 96MHz / 4 / 16 -- NO * 96MHz / 8 <= 400KHz <= 96MHz / 8 / 16 -- NO * 96MHz / 16 <= 400KHz <= 96MHz / 16 / 16 -- YES, prescaler == 16 */ if (/*frequency >= (BOARD_CORECLK_FREQ / 2) && */ frequency <= (BOARD_CORECLK_FREQ / 2 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV2; prescaler = 2; } else if (frequency >= (BOARD_CORECLK_FREQ / 4) && frequency <= (BOARD_CORECLK_FREQ / 4 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV4; prescaler = 4; } else if (frequency >= (BOARD_CORECLK_FREQ / 8) && frequency <= (BOARD_CORECLK_FREQ / 8 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV8; prescaler = 8; } else if (frequency >= (BOARD_CORECLK_FREQ / 16) && frequency <= (BOARD_CORECLK_FREQ / 16 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV16; prescaler = 16; } else if (frequency >= (BOARD_CORECLK_FREQ / 32) && frequency <= (BOARD_CORECLK_FREQ / 32 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV32; prescaler = 32; } else if (frequency >= (BOARD_CORECLK_FREQ / 64) && frequency <= (BOARD_CORECLK_FREQ / 64 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV64; prescaler = 64; } else if (frequency >= (BOARD_CORECLK_FREQ / 128) && frequency <= (BOARD_CORECLK_FREQ / 128 / 16)) { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV128; prescaler = 128; } else /* if (frequency >= (BOARD_CORECLK_FREQ / 256) && frequency <= (BOARD_CORECLK_FREQ / 256 / 16)) */ { sdclkfs = SDHC_SYSCTL_SDCLKFS_DIV256; prescaler = 256; } /* The optimal divider can than be calculated. * * For example, if the base clock frequency is 96 MHz, the target * frequency is 25 MHz, and the selected prescaler value is 2, then * * prescaled = 96MHz / 2 = 48MHz * divisor = (48MHz + 12.5HMz/ 25MHz = 2 * * And the resulting frequency will be 24MHz. * * Or, for example, if the target frequency is 400 kHz and the selected * prescaler is 16, the following* logic will select prescaler: * * prescaled = 96MHz / 16 = 6MHz * divisor = (6MHz + 200KHz) / 400KHz = 15 * * And the restuling frequency will be exactly 400KHz. */ prescaled = frequency / prescaler; divisor = (prescaled + (frequency >> 1)) / frequency; /* Set the new divisor information and enable all clocks in the SYSCTRL * register. * * TODO: Investigate using the automatically gated clocks to reduce power * consumption. */ regval = getreg32(KINETIS_SDHC_SYSCTL); regval &= ~(SDHC_SYSCTL_SDCLKFS_MASK|SDHC_SYSCTL_DVS_MASK); regval |= (sdclkfs | SDHC_SYSCTL_DVS_DIV(divisor)); regval |= (SDHC_SYSCTL_SDCLKEN|SDHC_SYSCTL_PEREN|SDHC_SYSCTL_HCKEN| SDHC_SYSCTL_IPGEN); putreg32(regval, KINETIS_SDHC_SYSCTL); fvdbg("SYSCTRL: %08x\n", getreg32(KINETIS_SDHC_SYSCTL)); } #endif /**************************************************************************** * Name: kinetis_clock * * Description: * Enable/disable SDIO clocking * * Input Parameters: * dev - An instance of the SDIO device interface * rate - Specifies the clocking to use (see enum sdio_clock_e) * * Returned Value: * None * ****************************************************************************/ #if CONFIG_KINETIS_SDHC_ABSFREQ static void kinetis_clock(FAR struct sdio_dev_s *dev, enum sdio_clock_e rate) { uint32_t frequency; uint32_t regval; /* The SDCLK must be disabled before its frequency can be changed: "SDCLK * frequency can be changed when this bit is 0. Then, the host controller * shall maintain the same clock frequency until SDCLK is stopped (stop at * SDCLK = 0). */ regval = getreg32(KINETIS_SDHC_SYSCTL); regval &= ~SDHC_SYSCTL_SDCLKEN; putreg32(regval, KINETIS_SDHC_SYSCTL); fvdbg("SYSCTRL: %08x\n", getreg32(KINETIS_SDHC_SYSCTL)); switch (rate) { default: case CLOCK_SDIO_DISABLED : /* Clock is disabled */ { /* Clear the prescaler and divisor settings and other clock * enables as well. */ regval &= ~(SDHC_SYSCTL_IPGEN|SDHC_SYSCTL_HCKEN|SDHC_SYSCTL_PEREN| SDHC_SYSCTL_SDCLKFS_MASK|SDHC_SYSCTL_DVS_MASK); putreg32(regval, KINETIS_SDHC_SYSCTL); fvdbg("SYSCTRL: %08x\n", getreg32(KINETIS_SDHC_SYSCTL)); return; } case CLOCK_IDMODE : /* Initial ID mode clocking (<400KHz) */ frequency = CONFIG_KINETIS_IDMODE_FREQ; break; case CLOCK_MMC_TRANSFER : /* MMC normal operation clocking */ frequency = CONFIG_KINETIS_MMCXFR_FREQ; break; case CLOCK_SD_TRANSFER_1BIT : /* SD normal operation clocking (narrow 1-bit mode) */ #ifndef CONFIG_SDIO_WIDTH_D1_ONLY frequency = CONFIG_KINETIS_SD1BIT_FREQ; break; #endif case CLOCK_SD_TRANSFER_4BIT : /* SD normal operation clocking (wide 4-bit mode) */ frequency = CONFIG_KINETIS_SD4BIT_FREQ; break; } /* Then set the selected frequency */ kinetis_frequency(dev, frequency); } #else static void kinetis_clock(FAR struct sdio_dev_s *dev, enum sdio_clock_e rate) { uint32_t regval; /* The SDCLK must be disabled before its frequency can be changed: "SDCLK * frequency can be changed when this bit is 0. Then, the host controller * shall maintain the same clock frequency until SDCLK is stopped (stop at * SDCLK = 0). */ regval = getreg32(KINETIS_SDHC_SYSCTL); regval &= ~SDHC_SYSCTL_SDCLKEN; putreg32(regval, KINETIS_SDHC_SYSCTL); fvdbg("SYSCTRL: %08x\n", getreg32(KINETIS_SDHC_SYSCTL)); /* Clear the old prescaler and divisor values so that new ones can be ORed * in. */ regval &= ~(SDHC_SYSCTL_SDCLKFS_MASK|SDHC_SYSCTL_DVS_MASK); /* Select the new prescaler and divisor values based on the requested mode * and the settings from the board.h file. * * TODO: Investigate using the automatically gated clocks to reduce power * consumption. */ switch (rate) { default: case CLOCK_SDIO_DISABLED : /* Clock is disabled */ { /* Clear the prescaler and divisor settings and other clock * enables as well. */ regval &= ~(SDHC_SYSCTL_IPGEN|SDHC_SYSCTL_HCKEN|SDHC_SYSCTL_PEREN); putreg32(regval, KINETIS_SDHC_SYSCTL); fvdbg("SYSCTRL: %08x\n", getreg32(KINETIS_SDHC_SYSCTL)); return; } case CLOCK_IDMODE : /* Initial ID mode clocking (<400KHz) */ regval |= (BOARD_SDHC_IDMODE_PRESCALER|BOARD_SDHC_IDMODE_DIVISOR| SDHC_SYSCTL_SDCLKEN|SDHC_SYSCTL_PEREN|SDHC_SYSCTL_HCKEN| SDHC_SYSCTL_IPGEN); break; case CLOCK_MMC_TRANSFER : /* MMC normal operation clocking */ regval |= (BOARD_SDHC_MMCMODE_PRESCALER|BOARD_SDHC_MMCMODE_DIVISOR| SDHC_SYSCTL_SDCLKEN|SDHC_SYSCTL_PEREN|SDHC_SYSCTL_HCKEN| SDHC_SYSCTL_IPGEN); break; case CLOCK_SD_TRANSFER_1BIT : /* SD normal operation clocking (narrow * 1-bit mode) */ #ifndef CONFIG_SDIO_WIDTH_D1_ONLY regval |= (BOARD_SDHC_SD1MODE_PRESCALER|BOARD_SDHC_IDMODE_DIVISOR| SDHC_SYSCTL_SDCLKEN|SDHC_SYSCTL_PEREN|SDHC_SYSCTL_HCKEN| SDHC_SYSCTL_IPGEN); break; #endif case CLOCK_SD_TRANSFER_4BIT : /* SD normal operation clocking (wide * 4-bit mode) */ regval |= (BOARD_SDHC_SD4MODE_PRESCALER|BOARD_SDHC_SD4MODE_DIVISOR| SDHC_SYSCTL_SDCLKEN|SDHC_SYSCTL_PEREN|SDHC_SYSCTL_HCKEN| SDHC_SYSCTL_IPGEN); break; } putreg32(regval, KINETIS_SDHC_SYSCTL); fvdbg("SYSCTRL: %08x\n", getreg32(KINETIS_SDHC_SYSCTL)); } #endif /**************************************************************************** * Name: kinetis_attach * * Description: * Attach and prepare interrupts * * Input Parameters: * dev - An instance of the SDIO device interface * * Returned Value: * OK on success; A negated errno on failure. * ****************************************************************************/ static int kinetis_attach(FAR struct sdio_dev_s *dev) { int ret; /* Attach the SDIO interrupt handler */ ret = irq_attach(KINETIS_IRQ_SDHC, kinetis_interrupt); if (ret == OK) { /* Disable all interrupts at the SDIO controller and clear all pending * interrupts. */ putreg32(0, KINETIS_SDHC_IRQSIGEN); putreg32(SDHC_INT_ALL, KINETIS_SDHC_IRQSTAT); #ifdef CONFIG_ARCH_IRQPRIO /* Set the interrupt priority */ up_prioritize_irq(KINETIS_IRQ_SDHC, CONFIG_KINETIS_SDHC_PRIO); #endif /* Enable SDIO interrupts at the NVIC. They can now be enabled at * the SDIO controller as needed. */ up_enable_irq(KINETIS_IRQ_SDHC); } return ret; } /**************************************************************************** * Name: kinetis_sendcmd * * Description: * Send the SDIO command * * Input Parameters: * dev - An instance of the SDIO device interface * cmd - The command to send (32-bits, encoded) * arg - 32-bit argument required with some commands * * Returned Value: * None * ****************************************************************************/ static int kinetis_sendcmd(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t arg) { uint32_t regval; uint32_t cmdidx; int32_t timeout; /* Initialize the command index */ cmdidx = (cmd & MMCSD_CMDIDX_MASK) >> MMCSD_CMDIDX_SHIFT; regval = cmdidx << SDHC_XFERTYP_CMDINX_SHIFT; /* Does a data transfer accompany the command? */ if ((cmd & MMCSD_DATAXFR) != 0) { /* Yes.. Configure the data transfer */ switch (cmd & MMCSD_DATAXFR_MASK) { default: case MMCSD_NODATAXFR : /* No.. no data transfer */ break; /* The following two cases are probably missing some setup logic */ case MMCSD_RDSTREAM : /* Yes.. streaming read data transfer */ regval |= (SDHC_XFERTYP_DPSEL | SDHC_XFERTYP_DTDSEL); break; case MMCSD_WRSTREAM : /* Yes.. streaming write data transfer */ regval |= SDHC_XFERTYP_DPSEL; break; case MMCSD_RDDATAXFR : /* Yes.. normal read data transfer */ regval |= (SDHC_XFERTYP_DPSEL | SDHC_XFERTYP_DTDSEL); break; case MMCSD_WRDATAXFR : /* Yes.. normal write data transfer */ regval |= SDHC_XFERTYP_DPSEL; break; } /* Is it a multi-block transfer? */ if ((cmd & MMCSD_MULTIBLOCK) != 0) { /* Yes.. should the transfer be stopped with ACMD12? */ if ((cmd & MMCSD_STOPXFR) != 0) { /* Yes.. Indefinite block transfer */ regval |= (SDHC_XFERTYP_MSBSEL | SDHC_XFERTYP_AC12EN); } else { /* No.. Fixed block transfer */ regval |= (SDHC_XFERTYP_MSBSEL | SDHC_XFERTYP_BCEN); } } } /* Configure response type bits */ switch (cmd & MMCSD_RESPONSE_MASK) { case MMCSD_NO_RESPONSE: /* No response */ regval |= SDHC_XFERTYP_RSPTYP_NONE; break; case MMCSD_R1B_RESPONSE: /* Response length 48, check busy & cmdindex*/ regval |= (SDHC_XFERTYP_RSPTYP_LEN48BSY|SDHC_XFERTYP_CICEN|SDHC_XFERTYP_CCCEN); break; case MMCSD_R1_RESPONSE: /* Response length 48, check cmdindex */ case MMCSD_R5_RESPONSE: case MMCSD_R6_RESPONSE: regval |= (SDHC_XFERTYP_RSPTYP_LEN48|SDHC_XFERTYP_CICEN|SDHC_XFERTYP_CCCEN); break; case MMCSD_R2_RESPONSE: /* Response length 136, check CRC */ regval |= (SDHC_XFERTYP_RSPTYP_LEN136|SDHC_XFERTYP_CCCEN); break; case MMCSD_R3_RESPONSE: /* Response length 48 */ case MMCSD_R4_RESPONSE: case MMCSD_R7_RESPONSE: regval |= SDHC_XFERTYP_RSPTYP_LEN48; break; } /* Enable DMA */ #ifdef CONFIG_SDIO_DMA /* Internal DMA is used */ regval |= SDHC_XFERTYP_DMAEN; #endif /* Other bits? What about CMDTYP? */ fvdbg("cmd: %08x arg: %08x regval: %08x\n", cmd, arg, regval); /* The Command Inhibit (CIHB) bit is set in the PRSSTAT bit immediately * after the transfer type register is written. This bit is cleared when * the command response is received. If this status bit is 0, it * indicates that the CMD line is not in use and the SDHC can issue a * SD/MMC Command using the CMD line. * * CIHB should always be set when this function is called. */ timeout = SDHC_CMDTIMEOUT; while ((getreg32(KINETIS_SDHC_PRSSTAT) & SDHC_PRSSTAT_CIHB) != 0) { if (--timeout <= 0) { fdbg("ERROR: Timeout cmd: %08x PRSSTAT: %08x\n", cmd, getreg32(KINETIS_SDHC_PRSSTAT)); return -EBUSY; } } /* Set the SDHC Argument value */ putreg32(arg, KINETIS_SDHC_CMDARG); /* Clear interrupt status and write the SDHC CMD */ putreg32(SDHC_RESPDONE_INTS, KINETIS_SDHC_IRQSTAT); putreg32(regval, KINETIS_SDHC_XFERTYP); return OK; } /**************************************************************************** * Name: kinetis_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, SDIO_WAITEVENT * will be called to receive the indication that the transfer is complete. * * Input Parameters: * dev - An instance of the SDIO 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 * ****************************************************************************/ #ifndef CONFIG_SDIO_DMA static int kinetis_recvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer, size_t nbytes) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev; DEBUGASSERT(priv != NULL && buffer != NULL && nbytes > 0); DEBUGASSERT(((uint32_t)buffer & 3) == 0); /* Reset the DPSM configuration */ kinetis_datadisable(); kinetis_sampleinit(); kinetis_sample(priv, SAMPLENDX_BEFORE_SETUP); /* Save the destination buffer information for use by the interrupt handler */ priv->buffer = (uint32_t*)buffer; priv->remaining = nbytes; /* Then set up the SDIO data path */ kinetis_dataconfig(priv, false, nbytes, 1, SDHC_DVS_DATATIMEOUT); /* And enable interrupts */ kinetis_configxfrints(priv, SDHC_RCVDONE_INTS); kinetis_sample(priv, SAMPLENDX_AFTER_SETUP); return OK; } #endif /**************************************************************************** * Name: kinetis_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 SDIO_SENDDATA is called. * * Input Parameters: * dev - An instance of the SDIO 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 * ****************************************************************************/ #ifndef CONFIG_SDIO_DMA 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; DEBUGASSERT(priv != NULL && buffer != NULL && nbytes > 0); DEBUGASSERT(((uint32_t)buffer & 3) == 0); /* Reset the DPSM configuration */ kinetis_datadisable(); kinetis_sampleinit(); kinetis_sample(priv, SAMPLENDX_BEFORE_SETUP); /* Save the source buffer information for use by the interrupt handler */ priv->buffer = (uint32_t*)buffer; priv->remaining = nbytes; /* Then set up the SDIO data path */ kinetis_dataconfig(priv, true, nbytes, 1, SDHC_DVS_DATATIMEOUT); /* Enable TX interrrupts */ kinetis_configxfrints(priv, SDHC_SNDDONE_INTS); kinetis_sample(priv, SAMPLENDX_AFTER_SETUP); return OK; } #endif /**************************************************************************** * Name: kinetis_cancel * * Description: * Cancel the data transfer setup of SDIO_RECVSETUP, SDIO_SENDSETUP, * SDIO_DMARECVSETUP or SDIO_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 SDIO device interface * * Returned Value: * OK is success; a negated errno on failure * ****************************************************************************/ static int kinetis_cancel(FAR struct sdio_dev_s *dev) { struct kinetis_dev_s *priv = (struct kinetis_dev_s*)dev; #ifdef CONFIG_SDIO_DMA uint32_t regval; #endif /* Disable all transfer- and event- related interrupts */ kinetis_configxfrints(priv, 0); kinetis_configwaitints(priv, 0, 0, 0); /* Clearing pending interrupt status on all transfer- and event- related * interrupts */ putreg32(SDHC_WAITALL_INTS, KINETIS_SDHC_IRQSTAT); /* Cancel any watchdog timeout */ (void)wd_cancel(priv->waitwdog); /* If this was a DMA transfer, make sure that DMA is stopped */ #ifdef CONFIG_SDIO_DMA /* Stop the DMA by resetting the data path*/ regval = getreg32(KINETIS_SDHC_SYSCTL); regval |= SDHC_SYSCTL_RSTD; putreg32(regval, KINETIS_SDHC_SYSCTL); #endif /* Mark no transfer in progress */ priv->remaining = 0; return OK; } /**************************************************************************** * Name: kinetis_waitresponse * * Description: * Poll-wait for the response to the last command to be ready. This * function should be called even after sending commands that have no * response (such as CMD0) to make sure that the hardware is ready to * receive the next command. * * Input Parameters: * dev - An instance of the SDIO 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 kinetis_waitresponse(FAR struct sdio_dev_s *dev, uint32_t cmd) { uint32_t errors; int32_t timeout; int ret = OK; switch (cmd & MMCSD_RESPONSE_MASK) { case MMCSD_NO_RESPONSE: timeout = SDHC_CMDTIMEOUT; errors = 0; return OK; case MMCSD_R1_RESPONSE: case MMCSD_R1B_RESPONSE: case MMCSD_R2_RESPONSE: case MMCSD_R6_RESPONSE: timeout = SDHC_LONGTIMEOUT; errors = SDHC_RESPERR_INTS; break; case MMCSD_R4_RESPONSE: case MMCSD_R5_RESPONSE: return -ENOSYS; case MMCSD_R3_RESPONSE: case MMCSD_R7_RESPONSE: timeout = SDHC_CMDTIMEOUT; errors = SDHC_RESPERR_INTS; break; default: return -EINVAL; } /* Then wait for the Command Complete (CC) indication (or timeout). The * CC bit is set when the end bit of the command response is received * (except Auto CMD12). */ while ((getreg32(KINETIS_SDHC_IRQSTAT) & SDHC_INT_CC) == 0) { if (--timeout <= 0) { fdbg("ERROR: Timeout cmd: %08x IRQSTAT: %08x\n", cmd, getreg32(KINETIS_SDHC_IRQSTAT)); return -ETIMEDOUT; } } /* Check for hardware detected errors */ if ((getreg32(KINETIS_SDHC_IRQSTAT) & errors) != 0) { fdbg("ERROR: cmd: %08x errors: %08x IRQSTAT: %08x\n", cmd, errors, getreg32(KINETIS_SDHC_IRQSTAT)); ret = -EIO; } /* Clear the response wait status bits */ putreg32(SDHC_RESPDONE_INTS, KINETIS_SDHC_IRQSTAT); return ret; } /**************************************************************************** * Name: kinetis_recvRx * * Description: * Receive response to SDIO 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 SDIO 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 faiure to obtain the requested reponse (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 kinetis_recvshortcrc(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rshort) { uint32_t regval; int ret = OK; /* 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 signalling 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 if (!rshort) { fdbg("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) { fdbg("ERROR: Wrong response CMD=%08x\n", cmd); ret = -EINVAL; } else #endif { /* Check if a timeout or CRC error occurred */ regval = getreg32(KINETIS_SDHC_IRQSTAT); if ((regval & SDHC_INT_CTOE) != 0) { fdbg("ERROR: Command timeout: %08x\n", regval); ret = -ETIMEDOUT; } else if ((regval & SDHC_INT_CCE) != 0) { fdbg("ERROR: CRC failure: %08x\n", regval); ret = -EIO; } } /* Return the R1/R1b/R6 response. These responses are returned in * CDMRSP0. NOTE: This is not true for R1b (Auto CMD12 response) which * is returned in CMDRSP3. */ *rshort = getreg32(KINETIS_SDHC_CMDRSP0); return ret; } static int kinetis_recvlong(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t rlong[4]) { uint32_t regval; int ret = OK; /* 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 /* Check that R1 is the correct response to this command */ if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R2_RESPONSE) { fdbg("ERROR: Wrong response CMD=%08x\n", cmd); ret = -EINVAL; } else #endif { /* Check if a timeout or CRC error occurred */ regval = getreg32(KINETIS_SDHC_IRQSTAT); if (regval & SDHC_INT_CTOE) { fdbg("ERROR: Timeout IRQSTAT: %08x\n", regval); ret = -ETIMEDOUT; } else if (regval & SDHC_INT_CCE) { fdbg("ERROR: CRC fail IRQSTAT: %08x\n", regval); ret = -EIO; } } /* Return the long response in CMDRSP3..0*/ if (rlong) { rlong[0] = getreg32(KINETIS_SDHC_CMDRSP3); rlong[1] = getreg32(KINETIS_SDHC_CMDRSP2); rlong[2] = getreg32(KINETIS_SDHC_CMDRSP1); rlong[3] = getreg32(KINETIS_SDHC_CMDRSP0); } return ret; } static int kinetis_recvshort(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rshort) { uint32_t regval; int ret = OK; /* 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 if ((cmd & MMCSD_RESPONSE_MASK) != MMCSD_R3_RESPONSE && (cmd & MMCSD_RESPONSE_MASK) != MMCSD_R7_RESPONSE) { fdbg("ERROR: Wrong response CMD=%08x\n", cmd); ret = -EINVAL; } else #endif { /* Check if a timeout occurred (Apparently a CRC error can terminate * a good response) */ regval = getreg32(KINETIS_SDHC_IRQSTAT); if (regval & SDHC_INT_CTOE) { fdbg("ERROR: Timeout IRQSTAT: %08x\n", regval); ret = -ETIMEDOUT; } } /* Return the short response in CMDRSP0 */ if (rshort) { *rshort = getreg32(KINETIS_SDHC_CMDRSP0); } return ret; } /* MMC responses not supported */ static int kinetis_recvnotimpl(FAR struct sdio_dev_s *dev, uint32_t cmd, uint32_t *rnotimpl) { /* Just return an error */ return -ENOSYS; } /**************************************************************************** * Name: kinetis_waitenable * * Description: * Enable/disable of a set of SDIO wait events. This is part of the * the SDIO_WAITEVENT sequence. The set of to-be-waited-for events is * configured before calling kinetis_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) SDIO_WAITENABLE is called * again specifying a different set of wait events, or (2) SDIO_EVENTWAIT * returns. * * Input Parameters: * dev - An instance of the SDIO device interface * eventset - A bitset of events to enable or disable (see SDIOWAIT_* * definitions). 0=disable; 1=enable. * * Returned Value: * None * ****************************************************************************/ static void kinetis_waitenable(FAR struct sdio_dev_s *dev, sdio_eventset_t eventset) { struct kinetis_dev_s *priv = (struct kinetis_dev_s*)dev; uint32_t waitints; DEBUGASSERT(priv != NULL); /* Disable event-related interrupts */ kinetis_configwaitints(priv, 0, 0, 0); /* Select the interrupt mask that will give us the appropriate wakeup * interrupts. */ waitints = 0; if ((eventset & (SDIOWAIT_CMDDONE|SDIOWAIT_RESPONSEDONE)) != 0) { waitints |= SDHC_RESPDONE_INTS; } if ((eventset & SDIOWAIT_TRANSFERDONE) != 0) { waitints |= SDHC_XFRDONE_INTS; } /* Enable event-related interrupts */ kinetis_configwaitints(priv, waitints, eventset, 0); } /**************************************************************************** * Name: kinetis_eventwait * * Description: * Wait for one of the enabled events to occur (or a timeout). Note that * all events enabled by SDIO_WAITEVENTS are disabled when kinetis_eventwait * returns. SDIO_WAITEVENTS must be called again before kinetis_eventwait * can be used again. * * Input Parameters: * dev - An instance of the SDIO 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 kinetis_eventwait(FAR struct sdio_dev_s *dev, uint32_t timeout) { struct kinetis_dev_s *priv = (struct kinetis_dev_s*)dev; sdio_eventset_t wkupevent = 0; int ret; /* 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. */ DEBUGASSERT((priv->waitevents != 0 && priv->wkupevent == 0) || (priv->waitevents == 0 && priv->wkupevent != 0)); /* Check if the timeout event is specified in the event set */ if ((priv->waitevents & SDIOWAIT_TIMEOUT) != 0) { int delay; /* Yes.. Handle a corner case */ if (!timeout) { return SDIOWAIT_TIMEOUT; } /* Start the watchdog timer */ delay = (timeout + (MSEC_PER_TICK-1)) / MSEC_PER_TICK; ret = wd_start(priv->waitwdog, delay, (wdentry_t)kinetis_eventtimeout, 1, (uint32_t)priv); if (ret != OK) { fdbg("ERROR: wd_start failed: %d\n", ret); } } /* Loop until the event (or the timeout occurs). Race conditions are avoided * by calling kinetis_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. */ kinetis_takesem(priv); 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 non-zero value. */ if (wkupevent != 0) { /* Yes... break out of the loop with wkupevent non-zero */ break; } } /* Disable event-related interrupts */ kinetis_configwaitints(priv, 0, 0, 0); #ifdef CONFIG_SDIO_DMA priv->xfrflags = 0; #endif kinetis_dumpsamples(priv); return wkupevent; } /**************************************************************************** * Name: kinetis_callbackenable * * Description: * Enable/disable of a set of SDIO callback events. This is part of the * the SDIO callback sequence. The set of events is configured to enabled * callbacks to the function provided in kinetis_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 SDIO device interface * eventset - A bitset of events to enable or disable (see SDIOMEDIA_* * definitions). 0=disable; 1=enable. * * Returned Value: * None * ****************************************************************************/ static void kinetis_callbackenable(FAR struct sdio_dev_s *dev, sdio_eventset_t eventset) { struct kinetis_dev_s *priv = (struct kinetis_dev_s*)dev; fvdbg("eventset: %02x\n", eventset); DEBUGASSERT(priv != NULL); priv->cbevents = eventset; kinetis_callback(priv); } /**************************************************************************** * Name: kinetis_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 SDIO_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 kinetis_registercallback(FAR struct sdio_dev_s *dev, worker_t callback, void *arg) { struct kinetis_dev_s *priv = (struct kinetis_dev_s*)dev; /* Disable callbacks and register this callback and is argument */ fvdbg("Register %p(%p)\n", callback, arg); DEBUGASSERT(priv != NULL); priv->cbevents = 0; priv->cbarg = arg; priv->callback = callback; return OK; } /**************************************************************************** * Name: kinetis_dmasupported * * Description: * Return true if the hardware can support DMA * * Input Parameters: * dev - An instance of the SDIO device interface * * Returned Value: * true if DMA is supported. * ****************************************************************************/ #ifdef CONFIG_SDIO_DMA static bool kinetis_dmasupported(FAR struct sdio_dev_s *dev) { return true; } #endif /**************************************************************************** * Name: kinetis_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 SDIO 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_SDIO_DMA static int kinetis_dmarecvsetup(FAR struct sdio_dev_s *dev, FAR uint8_t *buffer, size_t buflen) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev; DEBUGASSERT(priv != NULL && buffer != NULL && buflen > 0); DEBUGASSERT(((uint32_t)buffer & 3) == 0); /* Reset the DPSM configuration */ kinetis_datadisable(); /* Begin sampling register values */ kinetis_sampleinit(); kinetis_sample(priv, SAMPLENDX_BEFORE_SETUP); /* Save the destination buffer information for use by the interrupt handler */ priv->buffer = (uint32_t*)buffer; priv->remaining = buflen; /* Then set up the SDIO data path */ kinetis_dataconfig(priv, false, buflen, 1, SDHC_DVS_DATATIMEOUT); /* Configure the RX DMA */ kinetis_configxfrints(priv, SDHC_DMADONE_INTS); putreg32((uint32_t)buffer, KINETIS_SDHC_DSADDR); /* Sample the register state */ kinetis_sample(priv, SAMPLENDX_AFTER_SETUP); return OK; } #endif /**************************************************************************** * Name: kinetis_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 SDIO 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_SDIO_DMA static int kinetis_dmasendsetup(FAR struct sdio_dev_s *dev, FAR const uint8_t *buffer, size_t buflen) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev; DEBUGASSERT(priv != NULL && buffer != NULL && buflen > 0); DEBUGASSERT(((uint32_t)buffer & 3) == 0); /* Reset the DPSM configuration */ kinetis_datadisable(); /* Begin sampling register values */ kinetis_sampleinit(); kinetis_sample(priv, SAMPLENDX_BEFORE_SETUP); /* Save the source buffer information for use by the interrupt handler */ priv->buffer = (uint32_t*)buffer; priv->remaining = buflen; /* Then set up the SDIO data path */ kinetis_dataconfig(priv, true, buflen, 1, SDHC_DVS_DATATIMEOUT); /* Configure the TX DMA */ putreg32((uint32_t)buffer, KINETIS_SDHC_DSADDR); /* Sample the register state */ kinetis_sample(priv, SAMPLENDX_AFTER_SETUP); /* Enable TX interrrupts */ kinetis_configxfrints(priv, SDHC_DMADONE_INTS); return OK; } #endif /**************************************************************************** * Initialization/uninitialization/reset ****************************************************************************/ /**************************************************************************** * Name: kinetis_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 kinetis_callback(void *arg) { struct kinetis_dev_s *priv = (struct kinetis_dev_s*)arg; /* Is a callback registered? */ DEBUGASSERT(priv != NULL); fvdbg("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 */ fvdbg("Queuing callback to %p(%p)\n", priv->callback, priv->cbarg); (void)work_queue(HPWORK, &priv->cbwork, (worker_t)priv->callback, priv->cbarg, 0); } else { /* No.. then just call the callback here */ fvdbg("Callback to %p(%p)\n", priv->callback, priv->cbarg); priv->callback(priv->cbarg); } } } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: sdhc_initialize * * Description: * Initialize SDIO for operation. * * Input Parameters: * slotno - Not used. * * Returned Values: * A reference to an SDIO interface structure. NULL is returned on failures. * ****************************************************************************/ FAR struct sdio_dev_s *sdhc_initialize(int slotno) { uint32_t regval; /* There is only one slot */ struct kinetis_dev_s *priv = &g_sdhcdev; DEBUGASSERT(slotno == 0); /* Initialize the SDHC slot structure data structure */ sem_init(&priv->waitsem, 0, 0); priv->waitwdog = wd_create(); DEBUGASSERT(priv->waitwdog); /* Enable clocking to the SDHC module. Clocking is still diabled in * the SYSCTRL register. */ regval = getreg32(KINETIS_SIM_SCGC3); regval |= SIM_SCGC3_SDHC; putreg32(regval, KINETIS_SIM_SCGC3); fvdbg("SIM_SCGC3: %08x\n", regval); /* In addition to the system clock, the SDHC module needs a clock for the * base for the external card clock. There are four possible sources for * this clock, selected by the SIM's SOPT2 register: * * - Core/system clock * - MCGPLLCLK/MCGFLLCLK clock * - OSCERCLK EXTAL clock * - External bypass clock from off-chip (SCHC0_CLKINB) */ regval = getreg32(KINETIS_SIM_SOPT2); regval &= ~SIM_SOPT2_SDHCSRC_MASK; regval |= SIM_SOPT2_SDHCSRC_CORE; putreg32(regval, KINETIS_SIM_SOPT2); fvdbg("SIM_SOPT2: %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). * * If bus is multiplexed then there is a custom bus configuration utility * in the scope of the board support package. */ #ifndef CONFIG_SDIO_MUXBUS /* Data width 1, 4 or 8 */ kinetis_pinconfig(PIN_SDHC0_D0); /* Data width 4 or 8 */ #ifndef CONFIG_SDIO_WIDTH_D1_ONLY kinetis_pinconfig(PIN_SDHC0_D1); kinetis_pinconfig(PIN_SDHC0_D2); kinetis_pinconfig(PIN_SDHC0_D3); /* Data width 8 (not supported) */ #if 0 kinetis_pinconfig(PIN_SDHC0_D4); kinetis_pinconfig(PIN_SDHC0_D5); kinetis_pinconfig(PIN_SDHC0_D6); kinetis_pinconfig(PIN_SDHC0_D7); #endif #endif /* Clocking and CMD pins (all data widths) */ kinetis_pinconfig(PIN_SDHC0_DCLK); kinetis_pinconfig(PIN_SDHC0_CMD); #endif /* Reset the card and assure that it is in the initial, unconfigured * state. */ kinetis_reset(&priv->dev); kinetis_showregs(priv, "After reset"); return &g_sdhcdev.dev; } /**************************************************************************** * Name: sdhc_mediachange * * Description: * Called by board-specific logic -- possible from an interrupt handler -- * in order to signal to the driver that a card has been inserted or * removed from the slot * * Input Parameters: * dev - An instance of the SDIO driver device state structure. * cardinslot - true is a card has been detected in the slot; false if a * card has been removed from the slot. Only transitions * (inserted->removed or removed->inserted should be reported) * * Returned Values: * None * ****************************************************************************/ void sdhc_mediachange(FAR struct sdio_dev_s *dev, bool cardinslot) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev; uint8_t cdstatus; irqstate_t flags; /* Update card status */ flags = irqsave(); cdstatus = priv->cdstatus; if (cardinslot) { priv->cdstatus |= SDIO_STATUS_PRESENT; } else { priv->cdstatus &= ~SDIO_STATUS_PRESENT; } fvdbg("cdstatus OLD: %02x NEW: %02x\n", cdstatus, priv->cdstatus); /* Perform any requested callback if the status has changed */ if (cdstatus != priv->cdstatus) { kinetis_callback(priv); } irqrestore(flags); } /**************************************************************************** * Name: sdio_wrprotect * * Description: * Called by board-specific logic to report if the card in the slot is * mechanically write protected. * * Input Parameters: * dev - An instance of the SDIO driver device state structure. * wrprotect - true is a card is writeprotected. * * Returned Values: * None * ****************************************************************************/ void sdhc_wrprotect(FAR struct sdio_dev_s *dev, bool wrprotect) { struct kinetis_dev_s *priv = (struct kinetis_dev_s *)dev; irqstate_t flags; /* Update card status */ flags = irqsave(); if (wrprotect) { priv->cdstatus |= SDIO_STATUS_WRPROTECTED; } else { priv->cdstatus &= ~SDIO_STATUS_WRPROTECTED; } fvdbg("cdstatus: %02x\n", priv->cdstatus); irqrestore(flags); } #endif /* CONFIG_KINETIS_SDHC */