4e7945e48e
This patch adds support for the BCM57765[2] card reader function included in Broadcom's BCM57766 ethernet/sd3.0 controller. This controller is commonly found in laptops and Apple hardware (MBP, iMac, etc). The BCM57765 chipset is almost fully compatible with the SD3.0 spec, but does not support deriving a frequency below 781KHz from its default base clock via the standard SD3.0-configured 10-bit clock divisor. If such a divisor is set, card identification (which requires a 400KHz clock frequency) will time out[1]. As a work-around, I've made use of an undocumented device-specific clock control register to switch the controller to a 63MHz clock source when targeting clock speeds below 781KHz; the clock source is likewise switched back to the 200MHz clock when targeting speeds greater than 781KHz. Additionally, this patch fixes a small sdhci_pci bug; the sdhci_pci_softc->quirks flag was not copied to the sdhci_slot, resulting in `quirk` behavior not being applied by sdhci.c. [1] A number of Linux/FreeBSD users have noted that bringing up the chipsets' associated ethernet interface will allow SD cards to enumerate (slowly). This is a controller implementation side-effect triggered by the ethernet driver's reading of the hardware statistics registers. [2] This may also fix card detection when using the BCM57785 chipset, but I don't have access to the BCM57785 chipset and can't verify. I actually snagged some BCM57785 hardware recently (2012 Retina MacBook Pro) and can confirm that this also fixes card enumeration with the BCM57785 chipset; with the patch, I can boot off of the internal sdcard reader. PR: kern/203385 Submitted by: Landon Fuller <landon@landonf.org>
1509 lines
40 KiB
C
1509 lines
40 KiB
C
/*-
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* Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/callout.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/taskqueue.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/stdarg.h>
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#include <dev/mmc/bridge.h>
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#include <dev/mmc/mmcreg.h>
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#include <dev/mmc/mmcbrvar.h>
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#include "mmcbr_if.h"
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#include "sdhci.h"
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#include "sdhci_if.h"
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SYSCTL_NODE(_hw, OID_AUTO, sdhci, CTLFLAG_RD, 0, "sdhci driver");
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static int sdhci_debug;
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SYSCTL_INT(_hw_sdhci, OID_AUTO, debug, CTLFLAG_RWTUN, &sdhci_debug, 0, "Debug level");
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#define RD1(slot, off) SDHCI_READ_1((slot)->bus, (slot), (off))
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#define RD2(slot, off) SDHCI_READ_2((slot)->bus, (slot), (off))
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#define RD4(slot, off) SDHCI_READ_4((slot)->bus, (slot), (off))
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#define RD_MULTI_4(slot, off, ptr, count) \
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SDHCI_READ_MULTI_4((slot)->bus, (slot), (off), (ptr), (count))
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#define WR1(slot, off, val) SDHCI_WRITE_1((slot)->bus, (slot), (off), (val))
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#define WR2(slot, off, val) SDHCI_WRITE_2((slot)->bus, (slot), (off), (val))
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#define WR4(slot, off, val) SDHCI_WRITE_4((slot)->bus, (slot), (off), (val))
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#define WR_MULTI_4(slot, off, ptr, count) \
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SDHCI_WRITE_MULTI_4((slot)->bus, (slot), (off), (ptr), (count))
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static void sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock);
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static void sdhci_start(struct sdhci_slot *slot);
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static void sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data);
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static void sdhci_card_task(void *, int);
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/* helper routines */
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#define SDHCI_LOCK(_slot) mtx_lock(&(_slot)->mtx)
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#define SDHCI_UNLOCK(_slot) mtx_unlock(&(_slot)->mtx)
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#define SDHCI_LOCK_INIT(_slot) \
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mtx_init(&_slot->mtx, "SD slot mtx", "sdhci", MTX_DEF)
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#define SDHCI_LOCK_DESTROY(_slot) mtx_destroy(&_slot->mtx);
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#define SDHCI_ASSERT_LOCKED(_slot) mtx_assert(&_slot->mtx, MA_OWNED);
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#define SDHCI_ASSERT_UNLOCKED(_slot) mtx_assert(&_slot->mtx, MA_NOTOWNED);
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#define SDHCI_DEFAULT_MAX_FREQ 50
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#define SDHCI_200_MAX_DIVIDER 256
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#define SDHCI_300_MAX_DIVIDER 2046
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/*
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* Broadcom BCM577xx Controller Constants
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*/
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#define BCM577XX_DEFAULT_MAX_DIVIDER 256 /* Maximum divider supported by the default clock source. */
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#define BCM577XX_ALT_CLOCK_BASE 63000000 /* Alternative clock's base frequency. */
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#define BCM577XX_HOST_CONTROL 0x198
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#define BCM577XX_CTRL_CLKSEL_MASK 0xFFFFCFFF
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#define BCM577XX_CTRL_CLKSEL_SHIFT 12
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#define BCM577XX_CTRL_CLKSEL_DEFAULT 0x0
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#define BCM577XX_CTRL_CLKSEL_64MHZ 0x3
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static void
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sdhci_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
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{
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if (error != 0) {
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printf("getaddr: error %d\n", error);
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return;
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}
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*(bus_addr_t *)arg = segs[0].ds_addr;
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}
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static int
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slot_printf(struct sdhci_slot *slot, const char * fmt, ...)
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{
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va_list ap;
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int retval;
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retval = printf("%s-slot%d: ",
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device_get_nameunit(slot->bus), slot->num);
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va_start(ap, fmt);
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retval += vprintf(fmt, ap);
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va_end(ap);
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return (retval);
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}
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static void
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sdhci_dumpregs(struct sdhci_slot *slot)
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{
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slot_printf(slot,
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"============== REGISTER DUMP ==============\n");
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slot_printf(slot, "Sys addr: 0x%08x | Version: 0x%08x\n",
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RD4(slot, SDHCI_DMA_ADDRESS), RD2(slot, SDHCI_HOST_VERSION));
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slot_printf(slot, "Blk size: 0x%08x | Blk cnt: 0x%08x\n",
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RD2(slot, SDHCI_BLOCK_SIZE), RD2(slot, SDHCI_BLOCK_COUNT));
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slot_printf(slot, "Argument: 0x%08x | Trn mode: 0x%08x\n",
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RD4(slot, SDHCI_ARGUMENT), RD2(slot, SDHCI_TRANSFER_MODE));
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slot_printf(slot, "Present: 0x%08x | Host ctl: 0x%08x\n",
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RD4(slot, SDHCI_PRESENT_STATE), RD1(slot, SDHCI_HOST_CONTROL));
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slot_printf(slot, "Power: 0x%08x | Blk gap: 0x%08x\n",
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RD1(slot, SDHCI_POWER_CONTROL), RD1(slot, SDHCI_BLOCK_GAP_CONTROL));
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slot_printf(slot, "Wake-up: 0x%08x | Clock: 0x%08x\n",
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RD1(slot, SDHCI_WAKE_UP_CONTROL), RD2(slot, SDHCI_CLOCK_CONTROL));
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slot_printf(slot, "Timeout: 0x%08x | Int stat: 0x%08x\n",
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RD1(slot, SDHCI_TIMEOUT_CONTROL), RD4(slot, SDHCI_INT_STATUS));
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slot_printf(slot, "Int enab: 0x%08x | Sig enab: 0x%08x\n",
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RD4(slot, SDHCI_INT_ENABLE), RD4(slot, SDHCI_SIGNAL_ENABLE));
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slot_printf(slot, "AC12 err: 0x%08x | Slot int: 0x%08x\n",
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RD2(slot, SDHCI_ACMD12_ERR), RD2(slot, SDHCI_SLOT_INT_STATUS));
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slot_printf(slot, "Caps: 0x%08x | Max curr: 0x%08x\n",
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RD4(slot, SDHCI_CAPABILITIES), RD4(slot, SDHCI_MAX_CURRENT));
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slot_printf(slot,
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"===========================================\n");
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}
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static void
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sdhci_reset(struct sdhci_slot *slot, uint8_t mask)
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{
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int timeout;
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if (slot->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
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if (!(RD4(slot, SDHCI_PRESENT_STATE) &
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SDHCI_CARD_PRESENT))
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return;
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}
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/* Some controllers need this kick or reset won't work. */
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if ((mask & SDHCI_RESET_ALL) == 0 &&
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(slot->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)) {
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uint32_t clock;
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/* This is to force an update */
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clock = slot->clock;
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slot->clock = 0;
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sdhci_set_clock(slot, clock);
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}
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if (mask & SDHCI_RESET_ALL) {
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slot->clock = 0;
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slot->power = 0;
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}
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WR1(slot, SDHCI_SOFTWARE_RESET, mask);
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if (slot->quirks & SDHCI_QUIRK_WAITFOR_RESET_ASSERTED) {
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/*
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* Resets on TI OMAPs and AM335x are incompatible with SDHCI
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* specification. The reset bit has internal propagation delay,
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* so a fast read after write returns 0 even if reset process is
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* in progress. The workaround is to poll for 1 before polling
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* for 0. In the worst case, if we miss seeing it asserted the
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* time we spent waiting is enough to ensure the reset finishes.
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*/
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timeout = 10000;
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while ((RD1(slot, SDHCI_SOFTWARE_RESET) & mask) != mask) {
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if (timeout <= 0)
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break;
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timeout--;
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DELAY(1);
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}
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}
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/* Wait max 100 ms */
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timeout = 10000;
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/* Controller clears the bits when it's done */
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while (RD1(slot, SDHCI_SOFTWARE_RESET) & mask) {
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if (timeout <= 0) {
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slot_printf(slot, "Reset 0x%x never completed.\n",
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mask);
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sdhci_dumpregs(slot);
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return;
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}
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timeout--;
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DELAY(10);
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}
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}
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static void
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sdhci_init(struct sdhci_slot *slot)
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{
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sdhci_reset(slot, SDHCI_RESET_ALL);
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/* Enable interrupts. */
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slot->intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
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SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
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SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
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SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
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SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
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SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE |
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SDHCI_INT_ACMD12ERR;
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WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
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WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
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}
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static void
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sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock)
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{
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uint32_t clk_base;
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uint32_t clk_sel;
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uint32_t res;
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uint16_t clk;
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uint16_t div;
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int timeout;
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if (clock == slot->clock)
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return;
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slot->clock = clock;
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/* Turn off the clock. */
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clk = RD2(slot, SDHCI_CLOCK_CONTROL);
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WR2(slot, SDHCI_CLOCK_CONTROL, clk & ~SDHCI_CLOCK_CARD_EN);
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/* If no clock requested - left it so. */
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if (clock == 0)
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return;
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/* Determine the clock base frequency */
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clk_base = slot->max_clk;
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if (slot->quirks & SDHCI_QUIRK_BCM577XX_400KHZ_CLKSRC) {
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clk_sel = RD2(slot, BCM577XX_HOST_CONTROL) & BCM577XX_CTRL_CLKSEL_MASK;
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/* Select clock source appropriate for the requested frequency. */
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if ((clk_base / BCM577XX_DEFAULT_MAX_DIVIDER) > clock) {
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clk_base = BCM577XX_ALT_CLOCK_BASE;
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clk_sel |= (BCM577XX_CTRL_CLKSEL_64MHZ << BCM577XX_CTRL_CLKSEL_SHIFT);
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} else {
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clk_sel |= (BCM577XX_CTRL_CLKSEL_DEFAULT << BCM577XX_CTRL_CLKSEL_SHIFT);
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}
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WR2(slot, BCM577XX_HOST_CONTROL, clk_sel);
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}
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/* Recalculate timeout clock frequency based on the new sd clock. */
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if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
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slot->timeout_clk = slot->clock / 1000;
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if (slot->version < SDHCI_SPEC_300) {
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/* Looking for highest freq <= clock. */
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res = clk_base;
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for (div = 1; div < SDHCI_200_MAX_DIVIDER; div <<= 1) {
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if (res <= clock)
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break;
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res >>= 1;
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}
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/* Divider 1:1 is 0x00, 2:1 is 0x01, 256:1 is 0x80 ... */
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div >>= 1;
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}
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else {
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/* Version 3.0 divisors are multiples of two up to 1023*2 */
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if (clock >= clk_base)
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div = 0;
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else {
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for (div = 2; div < SDHCI_300_MAX_DIVIDER; div += 2) {
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if ((clk_base / div) <= clock)
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break;
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}
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}
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div >>= 1;
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}
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if (bootverbose || sdhci_debug)
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slot_printf(slot, "Divider %d for freq %d (base %d)\n",
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div, clock, clk_base);
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/* Now we have got divider, set it. */
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clk = (div & SDHCI_DIVIDER_MASK) << SDHCI_DIVIDER_SHIFT;
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clk |= ((div >> SDHCI_DIVIDER_MASK_LEN) & SDHCI_DIVIDER_HI_MASK)
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<< SDHCI_DIVIDER_HI_SHIFT;
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WR2(slot, SDHCI_CLOCK_CONTROL, clk);
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/* Enable clock. */
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clk |= SDHCI_CLOCK_INT_EN;
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WR2(slot, SDHCI_CLOCK_CONTROL, clk);
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/* Wait up to 10 ms until it stabilize. */
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timeout = 10;
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while (!((clk = RD2(slot, SDHCI_CLOCK_CONTROL))
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& SDHCI_CLOCK_INT_STABLE)) {
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if (timeout == 0) {
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slot_printf(slot,
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"Internal clock never stabilised.\n");
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sdhci_dumpregs(slot);
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return;
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}
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timeout--;
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DELAY(1000);
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}
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/* Pass clock signal to the bus. */
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clk |= SDHCI_CLOCK_CARD_EN;
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WR2(slot, SDHCI_CLOCK_CONTROL, clk);
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}
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static void
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sdhci_set_power(struct sdhci_slot *slot, u_char power)
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{
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uint8_t pwr;
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if (slot->power == power)
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return;
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slot->power = power;
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/* Turn off the power. */
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pwr = 0;
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WR1(slot, SDHCI_POWER_CONTROL, pwr);
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/* If power down requested - left it so. */
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if (power == 0)
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return;
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/* Set voltage. */
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switch (1 << power) {
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case MMC_OCR_LOW_VOLTAGE:
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pwr |= SDHCI_POWER_180;
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break;
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case MMC_OCR_290_300:
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case MMC_OCR_300_310:
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pwr |= SDHCI_POWER_300;
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break;
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case MMC_OCR_320_330:
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case MMC_OCR_330_340:
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pwr |= SDHCI_POWER_330;
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break;
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}
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WR1(slot, SDHCI_POWER_CONTROL, pwr);
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/* Turn on the power. */
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pwr |= SDHCI_POWER_ON;
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WR1(slot, SDHCI_POWER_CONTROL, pwr);
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}
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static void
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sdhci_read_block_pio(struct sdhci_slot *slot)
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{
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uint32_t data;
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char *buffer;
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size_t left;
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buffer = slot->curcmd->data->data;
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buffer += slot->offset;
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/* Transfer one block at a time. */
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left = min(512, slot->curcmd->data->len - slot->offset);
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slot->offset += left;
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/* If we are too fast, broken controllers return zeroes. */
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if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS)
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DELAY(10);
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/* Handle unaligned and aligned buffer cases. */
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if ((intptr_t)buffer & 3) {
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while (left > 3) {
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data = RD4(slot, SDHCI_BUFFER);
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buffer[0] = data;
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buffer[1] = (data >> 8);
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buffer[2] = (data >> 16);
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buffer[3] = (data >> 24);
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buffer += 4;
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left -= 4;
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}
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} else {
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RD_MULTI_4(slot, SDHCI_BUFFER,
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(uint32_t *)buffer, left >> 2);
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left &= 3;
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}
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/* Handle uneven size case. */
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if (left > 0) {
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data = RD4(slot, SDHCI_BUFFER);
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while (left > 0) {
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*(buffer++) = data;
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data >>= 8;
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left--;
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}
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}
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}
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static void
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sdhci_write_block_pio(struct sdhci_slot *slot)
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{
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uint32_t data = 0;
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char *buffer;
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size_t left;
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buffer = slot->curcmd->data->data;
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buffer += slot->offset;
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/* Transfer one block at a time. */
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left = min(512, slot->curcmd->data->len - slot->offset);
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slot->offset += left;
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/* Handle unaligned and aligned buffer cases. */
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if ((intptr_t)buffer & 3) {
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while (left > 3) {
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data = buffer[0] +
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(buffer[1] << 8) +
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(buffer[2] << 16) +
|
|
(buffer[3] << 24);
|
|
left -= 4;
|
|
buffer += 4;
|
|
WR4(slot, SDHCI_BUFFER, data);
|
|
}
|
|
} else {
|
|
WR_MULTI_4(slot, SDHCI_BUFFER,
|
|
(uint32_t *)buffer, left >> 2);
|
|
left &= 3;
|
|
}
|
|
/* Handle uneven size case. */
|
|
if (left > 0) {
|
|
while (left > 0) {
|
|
data <<= 8;
|
|
data += *(buffer++);
|
|
left--;
|
|
}
|
|
WR4(slot, SDHCI_BUFFER, data);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sdhci_transfer_pio(struct sdhci_slot *slot)
|
|
{
|
|
|
|
/* Read as many blocks as possible. */
|
|
if (slot->curcmd->data->flags & MMC_DATA_READ) {
|
|
while (RD4(slot, SDHCI_PRESENT_STATE) &
|
|
SDHCI_DATA_AVAILABLE) {
|
|
sdhci_read_block_pio(slot);
|
|
if (slot->offset >= slot->curcmd->data->len)
|
|
break;
|
|
}
|
|
} else {
|
|
while (RD4(slot, SDHCI_PRESENT_STATE) &
|
|
SDHCI_SPACE_AVAILABLE) {
|
|
sdhci_write_block_pio(slot);
|
|
if (slot->offset >= slot->curcmd->data->len)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sdhci_card_delay(void *arg)
|
|
{
|
|
struct sdhci_slot *slot = arg;
|
|
|
|
taskqueue_enqueue(taskqueue_swi_giant, &slot->card_task);
|
|
}
|
|
|
|
static void
|
|
sdhci_card_task(void *arg, int pending)
|
|
{
|
|
struct sdhci_slot *slot = arg;
|
|
|
|
SDHCI_LOCK(slot);
|
|
if (RD4(slot, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT) {
|
|
if (slot->dev == NULL) {
|
|
/* If card is present - attach mmc bus. */
|
|
slot->dev = device_add_child(slot->bus, "mmc", -1);
|
|
device_set_ivars(slot->dev, slot);
|
|
SDHCI_UNLOCK(slot);
|
|
device_probe_and_attach(slot->dev);
|
|
} else
|
|
SDHCI_UNLOCK(slot);
|
|
} else {
|
|
if (slot->dev != NULL) {
|
|
/* If no card present - detach mmc bus. */
|
|
device_t d = slot->dev;
|
|
slot->dev = NULL;
|
|
SDHCI_UNLOCK(slot);
|
|
device_delete_child(slot->bus, d);
|
|
} else
|
|
SDHCI_UNLOCK(slot);
|
|
}
|
|
}
|
|
|
|
int
|
|
sdhci_init_slot(device_t dev, struct sdhci_slot *slot, int num)
|
|
{
|
|
uint32_t caps, freq;
|
|
int err;
|
|
|
|
SDHCI_LOCK_INIT(slot);
|
|
slot->num = num;
|
|
slot->bus = dev;
|
|
|
|
/* Allocate DMA tag. */
|
|
err = bus_dma_tag_create(bus_get_dma_tag(dev),
|
|
DMA_BLOCK_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
|
|
BUS_SPACE_MAXADDR, NULL, NULL,
|
|
DMA_BLOCK_SIZE, 1, DMA_BLOCK_SIZE,
|
|
BUS_DMA_ALLOCNOW, NULL, NULL,
|
|
&slot->dmatag);
|
|
if (err != 0) {
|
|
device_printf(dev, "Can't create DMA tag\n");
|
|
SDHCI_LOCK_DESTROY(slot);
|
|
return (err);
|
|
}
|
|
/* Allocate DMA memory. */
|
|
err = bus_dmamem_alloc(slot->dmatag, (void **)&slot->dmamem,
|
|
BUS_DMA_NOWAIT, &slot->dmamap);
|
|
if (err != 0) {
|
|
device_printf(dev, "Can't alloc DMA memory\n");
|
|
SDHCI_LOCK_DESTROY(slot);
|
|
return (err);
|
|
}
|
|
/* Map the memory. */
|
|
err = bus_dmamap_load(slot->dmatag, slot->dmamap,
|
|
(void *)slot->dmamem, DMA_BLOCK_SIZE,
|
|
sdhci_getaddr, &slot->paddr, 0);
|
|
if (err != 0 || slot->paddr == 0) {
|
|
device_printf(dev, "Can't load DMA memory\n");
|
|
SDHCI_LOCK_DESTROY(slot);
|
|
if(err)
|
|
return (err);
|
|
else
|
|
return (EFAULT);
|
|
}
|
|
|
|
/* Initialize slot. */
|
|
sdhci_init(slot);
|
|
slot->version = (RD2(slot, SDHCI_HOST_VERSION)
|
|
>> SDHCI_SPEC_VER_SHIFT) & SDHCI_SPEC_VER_MASK;
|
|
if (slot->quirks & SDHCI_QUIRK_MISSING_CAPS)
|
|
caps = slot->caps;
|
|
else
|
|
caps = RD4(slot, SDHCI_CAPABILITIES);
|
|
/* Calculate base clock frequency. */
|
|
if (slot->version >= SDHCI_SPEC_300)
|
|
freq = (caps & SDHCI_CLOCK_V3_BASE_MASK) >>
|
|
SDHCI_CLOCK_BASE_SHIFT;
|
|
else
|
|
freq = (caps & SDHCI_CLOCK_BASE_MASK) >>
|
|
SDHCI_CLOCK_BASE_SHIFT;
|
|
if (freq != 0)
|
|
slot->max_clk = freq * 1000000;
|
|
/*
|
|
* If the frequency wasn't in the capabilities and the hardware driver
|
|
* hasn't already set max_clk we're probably not going to work right
|
|
* with an assumption, so complain about it.
|
|
*/
|
|
if (slot->max_clk == 0) {
|
|
slot->max_clk = SDHCI_DEFAULT_MAX_FREQ * 1000000;
|
|
device_printf(dev, "Hardware doesn't specify base clock "
|
|
"frequency, using %dMHz as default.\n", SDHCI_DEFAULT_MAX_FREQ);
|
|
}
|
|
/* Calculate timeout clock frequency. */
|
|
if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) {
|
|
slot->timeout_clk = slot->max_clk / 1000;
|
|
} else {
|
|
slot->timeout_clk =
|
|
(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
|
|
if (caps & SDHCI_TIMEOUT_CLK_UNIT)
|
|
slot->timeout_clk *= 1000;
|
|
}
|
|
/*
|
|
* If the frequency wasn't in the capabilities and the hardware driver
|
|
* hasn't already set timeout_clk we'll probably work okay using the
|
|
* max timeout, but still mention it.
|
|
*/
|
|
if (slot->timeout_clk == 0) {
|
|
device_printf(dev, "Hardware doesn't specify timeout clock "
|
|
"frequency, setting BROKEN_TIMEOUT quirk.\n");
|
|
slot->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
|
|
}
|
|
|
|
slot->host.f_min = SDHCI_MIN_FREQ(slot->bus, slot);
|
|
slot->host.f_max = slot->max_clk;
|
|
slot->host.host_ocr = 0;
|
|
if (caps & SDHCI_CAN_VDD_330)
|
|
slot->host.host_ocr |= MMC_OCR_320_330 | MMC_OCR_330_340;
|
|
if (caps & SDHCI_CAN_VDD_300)
|
|
slot->host.host_ocr |= MMC_OCR_290_300 | MMC_OCR_300_310;
|
|
if (caps & SDHCI_CAN_VDD_180)
|
|
slot->host.host_ocr |= MMC_OCR_LOW_VOLTAGE;
|
|
if (slot->host.host_ocr == 0) {
|
|
device_printf(dev, "Hardware doesn't report any "
|
|
"support voltages.\n");
|
|
}
|
|
slot->host.caps = MMC_CAP_4_BIT_DATA;
|
|
if (caps & SDHCI_CAN_DO_8BITBUS)
|
|
slot->host.caps |= MMC_CAP_8_BIT_DATA;
|
|
if (caps & SDHCI_CAN_DO_HISPD)
|
|
slot->host.caps |= MMC_CAP_HSPEED;
|
|
/* Decide if we have usable DMA. */
|
|
if (caps & SDHCI_CAN_DO_DMA)
|
|
slot->opt |= SDHCI_HAVE_DMA;
|
|
|
|
if (slot->quirks & SDHCI_QUIRK_BROKEN_DMA)
|
|
slot->opt &= ~SDHCI_HAVE_DMA;
|
|
if (slot->quirks & SDHCI_QUIRK_FORCE_DMA)
|
|
slot->opt |= SDHCI_HAVE_DMA;
|
|
|
|
/*
|
|
* Use platform-provided transfer backend
|
|
* with PIO as a fallback mechanism
|
|
*/
|
|
if (slot->opt & SDHCI_PLATFORM_TRANSFER)
|
|
slot->opt &= ~SDHCI_HAVE_DMA;
|
|
|
|
if (bootverbose || sdhci_debug) {
|
|
slot_printf(slot, "%uMHz%s %s%s%s%s %s\n",
|
|
slot->max_clk / 1000000,
|
|
(caps & SDHCI_CAN_DO_HISPD) ? " HS" : "",
|
|
(caps & MMC_CAP_8_BIT_DATA) ? "8bits" :
|
|
((caps & MMC_CAP_4_BIT_DATA) ? "4bits" : "1bit"),
|
|
(caps & SDHCI_CAN_VDD_330) ? " 3.3V" : "",
|
|
(caps & SDHCI_CAN_VDD_300) ? " 3.0V" : "",
|
|
(caps & SDHCI_CAN_VDD_180) ? " 1.8V" : "",
|
|
(slot->opt & SDHCI_HAVE_DMA) ? "DMA" : "PIO");
|
|
sdhci_dumpregs(slot);
|
|
}
|
|
|
|
slot->timeout = 10;
|
|
SYSCTL_ADD_INT(device_get_sysctl_ctx(slot->bus),
|
|
SYSCTL_CHILDREN(device_get_sysctl_tree(slot->bus)), OID_AUTO,
|
|
"timeout", CTLFLAG_RW, &slot->timeout, 0,
|
|
"Maximum timeout for SDHCI transfers (in secs)");
|
|
TASK_INIT(&slot->card_task, 0, sdhci_card_task, slot);
|
|
callout_init(&slot->card_callout, 1);
|
|
callout_init_mtx(&slot->timeout_callout, &slot->mtx, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sdhci_start_slot(struct sdhci_slot *slot)
|
|
{
|
|
sdhci_card_task(slot, 0);
|
|
}
|
|
|
|
int
|
|
sdhci_cleanup_slot(struct sdhci_slot *slot)
|
|
{
|
|
device_t d;
|
|
|
|
callout_drain(&slot->timeout_callout);
|
|
callout_drain(&slot->card_callout);
|
|
taskqueue_drain(taskqueue_swi_giant, &slot->card_task);
|
|
|
|
SDHCI_LOCK(slot);
|
|
d = slot->dev;
|
|
slot->dev = NULL;
|
|
SDHCI_UNLOCK(slot);
|
|
if (d != NULL)
|
|
device_delete_child(slot->bus, d);
|
|
|
|
SDHCI_LOCK(slot);
|
|
sdhci_reset(slot, SDHCI_RESET_ALL);
|
|
SDHCI_UNLOCK(slot);
|
|
bus_dmamap_unload(slot->dmatag, slot->dmamap);
|
|
bus_dmamem_free(slot->dmatag, slot->dmamem, slot->dmamap);
|
|
bus_dma_tag_destroy(slot->dmatag);
|
|
|
|
SDHCI_LOCK_DESTROY(slot);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_suspend(struct sdhci_slot *slot)
|
|
{
|
|
sdhci_reset(slot, SDHCI_RESET_ALL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_resume(struct sdhci_slot *slot)
|
|
{
|
|
sdhci_init(slot);
|
|
|
|
return (0);
|
|
}
|
|
|
|
uint32_t
|
|
sdhci_generic_min_freq(device_t brdev, struct sdhci_slot *slot)
|
|
{
|
|
if (slot->version >= SDHCI_SPEC_300)
|
|
return (slot->max_clk / SDHCI_300_MAX_DIVIDER);
|
|
else
|
|
return (slot->max_clk / SDHCI_200_MAX_DIVIDER);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_update_ios(device_t brdev, device_t reqdev)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(reqdev);
|
|
struct mmc_ios *ios = &slot->host.ios;
|
|
|
|
SDHCI_LOCK(slot);
|
|
/* Do full reset on bus power down to clear from any state. */
|
|
if (ios->power_mode == power_off) {
|
|
WR4(slot, SDHCI_SIGNAL_ENABLE, 0);
|
|
sdhci_init(slot);
|
|
}
|
|
/* Configure the bus. */
|
|
sdhci_set_clock(slot, ios->clock);
|
|
sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd);
|
|
if (ios->bus_width == bus_width_8) {
|
|
slot->hostctrl |= SDHCI_CTRL_8BITBUS;
|
|
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
|
|
} else if (ios->bus_width == bus_width_4) {
|
|
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
|
|
slot->hostctrl |= SDHCI_CTRL_4BITBUS;
|
|
} else if (ios->bus_width == bus_width_1) {
|
|
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
|
|
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
|
|
} else {
|
|
panic("Invalid bus width: %d", ios->bus_width);
|
|
}
|
|
if (ios->timing == bus_timing_hs &&
|
|
!(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT))
|
|
slot->hostctrl |= SDHCI_CTRL_HISPD;
|
|
else
|
|
slot->hostctrl &= ~SDHCI_CTRL_HISPD;
|
|
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl);
|
|
/* Some controllers like reset after bus changes. */
|
|
if(slot->quirks & SDHCI_QUIRK_RESET_ON_IOS)
|
|
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
|
|
|
|
SDHCI_UNLOCK(slot);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sdhci_req_done(struct sdhci_slot *slot)
|
|
{
|
|
struct mmc_request *req;
|
|
|
|
if (slot->req != NULL && slot->curcmd != NULL) {
|
|
callout_stop(&slot->timeout_callout);
|
|
req = slot->req;
|
|
slot->req = NULL;
|
|
slot->curcmd = NULL;
|
|
req->done(req);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sdhci_timeout(void *arg)
|
|
{
|
|
struct sdhci_slot *slot = arg;
|
|
|
|
if (slot->curcmd != NULL) {
|
|
slot_printf(slot, " Controller timeout\n");
|
|
sdhci_dumpregs(slot);
|
|
sdhci_reset(slot, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
|
|
slot->curcmd->error = MMC_ERR_TIMEOUT;
|
|
sdhci_req_done(slot);
|
|
} else {
|
|
slot_printf(slot, " Spurious timeout - no active command\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
sdhci_set_transfer_mode(struct sdhci_slot *slot,
|
|
struct mmc_data *data)
|
|
{
|
|
uint16_t mode;
|
|
|
|
if (data == NULL)
|
|
return;
|
|
|
|
mode = SDHCI_TRNS_BLK_CNT_EN;
|
|
if (data->len > 512)
|
|
mode |= SDHCI_TRNS_MULTI;
|
|
if (data->flags & MMC_DATA_READ)
|
|
mode |= SDHCI_TRNS_READ;
|
|
if (slot->req->stop)
|
|
mode |= SDHCI_TRNS_ACMD12;
|
|
if (slot->flags & SDHCI_USE_DMA)
|
|
mode |= SDHCI_TRNS_DMA;
|
|
|
|
WR2(slot, SDHCI_TRANSFER_MODE, mode);
|
|
}
|
|
|
|
static void
|
|
sdhci_start_command(struct sdhci_slot *slot, struct mmc_command *cmd)
|
|
{
|
|
int flags, timeout;
|
|
uint32_t mask, state;
|
|
|
|
slot->curcmd = cmd;
|
|
slot->cmd_done = 0;
|
|
|
|
cmd->error = MMC_ERR_NONE;
|
|
|
|
/* This flags combination is not supported by controller. */
|
|
if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
|
|
slot_printf(slot, "Unsupported response type!\n");
|
|
cmd->error = MMC_ERR_FAILED;
|
|
sdhci_req_done(slot);
|
|
return;
|
|
}
|
|
|
|
/* Read controller present state. */
|
|
state = RD4(slot, SDHCI_PRESENT_STATE);
|
|
/* Do not issue command if there is no card, clock or power.
|
|
* Controller will not detect timeout without clock active. */
|
|
if ((state & SDHCI_CARD_PRESENT) == 0 ||
|
|
slot->power == 0 ||
|
|
slot->clock == 0) {
|
|
cmd->error = MMC_ERR_FAILED;
|
|
sdhci_req_done(slot);
|
|
return;
|
|
}
|
|
/* Always wait for free CMD bus. */
|
|
mask = SDHCI_CMD_INHIBIT;
|
|
/* Wait for free DAT if we have data or busy signal. */
|
|
if (cmd->data || (cmd->flags & MMC_RSP_BUSY))
|
|
mask |= SDHCI_DAT_INHIBIT;
|
|
/* We shouldn't wait for DAT for stop commands. */
|
|
if (cmd == slot->req->stop)
|
|
mask &= ~SDHCI_DAT_INHIBIT;
|
|
/*
|
|
* Wait for bus no more then 250 ms. Typically there will be no wait
|
|
* here at all, but when writing a crash dump we may be bypassing the
|
|
* host platform's interrupt handler, and in some cases that handler
|
|
* may be working around hardware quirks such as not respecting r1b
|
|
* busy indications. In those cases, this wait-loop serves the purpose
|
|
* of waiting for the prior command and data transfers to be done, and
|
|
* SD cards are allowed to take up to 250ms for write and erase ops.
|
|
* (It's usually more like 20-30ms in the real world.)
|
|
*/
|
|
timeout = 250;
|
|
while (state & mask) {
|
|
if (timeout == 0) {
|
|
slot_printf(slot, "Controller never released "
|
|
"inhibit bit(s).\n");
|
|
sdhci_dumpregs(slot);
|
|
cmd->error = MMC_ERR_FAILED;
|
|
sdhci_req_done(slot);
|
|
return;
|
|
}
|
|
timeout--;
|
|
DELAY(1000);
|
|
state = RD4(slot, SDHCI_PRESENT_STATE);
|
|
}
|
|
|
|
/* Prepare command flags. */
|
|
if (!(cmd->flags & MMC_RSP_PRESENT))
|
|
flags = SDHCI_CMD_RESP_NONE;
|
|
else if (cmd->flags & MMC_RSP_136)
|
|
flags = SDHCI_CMD_RESP_LONG;
|
|
else if (cmd->flags & MMC_RSP_BUSY)
|
|
flags = SDHCI_CMD_RESP_SHORT_BUSY;
|
|
else
|
|
flags = SDHCI_CMD_RESP_SHORT;
|
|
if (cmd->flags & MMC_RSP_CRC)
|
|
flags |= SDHCI_CMD_CRC;
|
|
if (cmd->flags & MMC_RSP_OPCODE)
|
|
flags |= SDHCI_CMD_INDEX;
|
|
if (cmd->data)
|
|
flags |= SDHCI_CMD_DATA;
|
|
if (cmd->opcode == MMC_STOP_TRANSMISSION)
|
|
flags |= SDHCI_CMD_TYPE_ABORT;
|
|
/* Prepare data. */
|
|
sdhci_start_data(slot, cmd->data);
|
|
/*
|
|
* Interrupt aggregation: To reduce total number of interrupts
|
|
* group response interrupt with data interrupt when possible.
|
|
* If there going to be data interrupt, mask response one.
|
|
*/
|
|
if (slot->data_done == 0) {
|
|
WR4(slot, SDHCI_SIGNAL_ENABLE,
|
|
slot->intmask &= ~SDHCI_INT_RESPONSE);
|
|
}
|
|
/* Set command argument. */
|
|
WR4(slot, SDHCI_ARGUMENT, cmd->arg);
|
|
/* Set data transfer mode. */
|
|
sdhci_set_transfer_mode(slot, cmd->data);
|
|
/* Start command. */
|
|
WR2(slot, SDHCI_COMMAND_FLAGS, (cmd->opcode << 8) | (flags & 0xff));
|
|
/* Start timeout callout. */
|
|
callout_reset(&slot->timeout_callout, slot->timeout * hz,
|
|
sdhci_timeout, slot);
|
|
}
|
|
|
|
static void
|
|
sdhci_finish_command(struct sdhci_slot *slot)
|
|
{
|
|
int i;
|
|
|
|
slot->cmd_done = 1;
|
|
/* Interrupt aggregation: Restore command interrupt.
|
|
* Main restore point for the case when command interrupt
|
|
* happened first. */
|
|
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask |= SDHCI_INT_RESPONSE);
|
|
/* In case of error - reset host and return. */
|
|
if (slot->curcmd->error) {
|
|
sdhci_reset(slot, SDHCI_RESET_CMD);
|
|
sdhci_reset(slot, SDHCI_RESET_DATA);
|
|
sdhci_start(slot);
|
|
return;
|
|
}
|
|
/* If command has response - fetch it. */
|
|
if (slot->curcmd->flags & MMC_RSP_PRESENT) {
|
|
if (slot->curcmd->flags & MMC_RSP_136) {
|
|
/* CRC is stripped so we need one byte shift. */
|
|
uint8_t extra = 0;
|
|
for (i = 0; i < 4; i++) {
|
|
uint32_t val = RD4(slot, SDHCI_RESPONSE + i * 4);
|
|
if (slot->quirks & SDHCI_QUIRK_DONT_SHIFT_RESPONSE)
|
|
slot->curcmd->resp[3 - i] = val;
|
|
else {
|
|
slot->curcmd->resp[3 - i] =
|
|
(val << 8) | extra;
|
|
extra = val >> 24;
|
|
}
|
|
}
|
|
} else
|
|
slot->curcmd->resp[0] = RD4(slot, SDHCI_RESPONSE);
|
|
}
|
|
/* If data ready - finish. */
|
|
if (slot->data_done)
|
|
sdhci_start(slot);
|
|
}
|
|
|
|
static void
|
|
sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data)
|
|
{
|
|
uint32_t target_timeout, current_timeout;
|
|
uint8_t div;
|
|
|
|
if (data == NULL && (slot->curcmd->flags & MMC_RSP_BUSY) == 0) {
|
|
slot->data_done = 1;
|
|
return;
|
|
}
|
|
|
|
slot->data_done = 0;
|
|
|
|
/* Calculate and set data timeout.*/
|
|
/* XXX: We should have this from mmc layer, now assume 1 sec. */
|
|
if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) {
|
|
div = 0xE;
|
|
} else {
|
|
target_timeout = 1000000;
|
|
div = 0;
|
|
current_timeout = (1 << 13) * 1000 / slot->timeout_clk;
|
|
while (current_timeout < target_timeout && div < 0xE) {
|
|
++div;
|
|
current_timeout <<= 1;
|
|
}
|
|
/* Compensate for an off-by-one error in the CaFe chip.*/
|
|
if (div < 0xE &&
|
|
(slot->quirks & SDHCI_QUIRK_INCR_TIMEOUT_CONTROL)) {
|
|
++div;
|
|
}
|
|
}
|
|
WR1(slot, SDHCI_TIMEOUT_CONTROL, div);
|
|
|
|
if (data == NULL)
|
|
return;
|
|
|
|
/* Use DMA if possible. */
|
|
if ((slot->opt & SDHCI_HAVE_DMA))
|
|
slot->flags |= SDHCI_USE_DMA;
|
|
/* If data is small, broken DMA may return zeroes instead of data, */
|
|
if ((slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS) &&
|
|
(data->len <= 512))
|
|
slot->flags &= ~SDHCI_USE_DMA;
|
|
/* Some controllers require even block sizes. */
|
|
if ((slot->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) &&
|
|
((data->len) & 0x3))
|
|
slot->flags &= ~SDHCI_USE_DMA;
|
|
/* Load DMA buffer. */
|
|
if (slot->flags & SDHCI_USE_DMA) {
|
|
if (data->flags & MMC_DATA_READ)
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_PREREAD);
|
|
else {
|
|
memcpy(slot->dmamem, data->data,
|
|
(data->len < DMA_BLOCK_SIZE) ?
|
|
data->len : DMA_BLOCK_SIZE);
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_PREWRITE);
|
|
}
|
|
WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr);
|
|
/* Interrupt aggregation: Mask border interrupt
|
|
* for the last page and unmask else. */
|
|
if (data->len == DMA_BLOCK_SIZE)
|
|
slot->intmask &= ~SDHCI_INT_DMA_END;
|
|
else
|
|
slot->intmask |= SDHCI_INT_DMA_END;
|
|
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
|
|
}
|
|
/* Current data offset for both PIO and DMA. */
|
|
slot->offset = 0;
|
|
/* Set block size and request IRQ on 4K border. */
|
|
WR2(slot, SDHCI_BLOCK_SIZE,
|
|
SDHCI_MAKE_BLKSZ(DMA_BOUNDARY, (data->len < 512)?data->len:512));
|
|
/* Set block count. */
|
|
WR2(slot, SDHCI_BLOCK_COUNT, (data->len + 511) / 512);
|
|
}
|
|
|
|
void
|
|
sdhci_finish_data(struct sdhci_slot *slot)
|
|
{
|
|
struct mmc_data *data = slot->curcmd->data;
|
|
|
|
/* Interrupt aggregation: Restore command interrupt.
|
|
* Auxiliary restore point for the case when data interrupt
|
|
* happened first. */
|
|
if (!slot->cmd_done) {
|
|
WR4(slot, SDHCI_SIGNAL_ENABLE,
|
|
slot->intmask |= SDHCI_INT_RESPONSE);
|
|
}
|
|
/* Unload rest of data from DMA buffer. */
|
|
if (!slot->data_done && (slot->flags & SDHCI_USE_DMA)) {
|
|
if (data->flags & MMC_DATA_READ) {
|
|
size_t left = data->len - slot->offset;
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_POSTREAD);
|
|
memcpy((u_char*)data->data + slot->offset, slot->dmamem,
|
|
(left < DMA_BLOCK_SIZE)?left:DMA_BLOCK_SIZE);
|
|
} else
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
}
|
|
slot->data_done = 1;
|
|
/* If there was error - reset the host. */
|
|
if (slot->curcmd->error) {
|
|
sdhci_reset(slot, SDHCI_RESET_CMD);
|
|
sdhci_reset(slot, SDHCI_RESET_DATA);
|
|
sdhci_start(slot);
|
|
return;
|
|
}
|
|
/* If we already have command response - finish. */
|
|
if (slot->cmd_done)
|
|
sdhci_start(slot);
|
|
}
|
|
|
|
static void
|
|
sdhci_start(struct sdhci_slot *slot)
|
|
{
|
|
struct mmc_request *req;
|
|
|
|
req = slot->req;
|
|
if (req == NULL)
|
|
return;
|
|
|
|
if (!(slot->flags & CMD_STARTED)) {
|
|
slot->flags |= CMD_STARTED;
|
|
sdhci_start_command(slot, req->cmd);
|
|
return;
|
|
}
|
|
/* We don't need this until using Auto-CMD12 feature
|
|
if (!(slot->flags & STOP_STARTED) && req->stop) {
|
|
slot->flags |= STOP_STARTED;
|
|
sdhci_start_command(slot, req->stop);
|
|
return;
|
|
}
|
|
*/
|
|
if (sdhci_debug > 1)
|
|
slot_printf(slot, "result: %d\n", req->cmd->error);
|
|
if (!req->cmd->error &&
|
|
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)) {
|
|
sdhci_reset(slot, SDHCI_RESET_CMD);
|
|
sdhci_reset(slot, SDHCI_RESET_DATA);
|
|
}
|
|
|
|
sdhci_req_done(slot);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_request(device_t brdev, device_t reqdev, struct mmc_request *req)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(reqdev);
|
|
|
|
SDHCI_LOCK(slot);
|
|
if (slot->req != NULL) {
|
|
SDHCI_UNLOCK(slot);
|
|
return (EBUSY);
|
|
}
|
|
if (sdhci_debug > 1) {
|
|
slot_printf(slot, "CMD%u arg %#x flags %#x dlen %u dflags %#x\n",
|
|
req->cmd->opcode, req->cmd->arg, req->cmd->flags,
|
|
(req->cmd->data)?(u_int)req->cmd->data->len:0,
|
|
(req->cmd->data)?req->cmd->data->flags:0);
|
|
}
|
|
slot->req = req;
|
|
slot->flags = 0;
|
|
sdhci_start(slot);
|
|
SDHCI_UNLOCK(slot);
|
|
if (dumping) {
|
|
while (slot->req != NULL) {
|
|
sdhci_generic_intr(slot);
|
|
DELAY(10);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_get_ro(device_t brdev, device_t reqdev)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(reqdev);
|
|
uint32_t val;
|
|
|
|
SDHCI_LOCK(slot);
|
|
val = RD4(slot, SDHCI_PRESENT_STATE);
|
|
SDHCI_UNLOCK(slot);
|
|
return (!(val & SDHCI_WRITE_PROTECT));
|
|
}
|
|
|
|
int
|
|
sdhci_generic_acquire_host(device_t brdev, device_t reqdev)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(reqdev);
|
|
int err = 0;
|
|
|
|
SDHCI_LOCK(slot);
|
|
while (slot->bus_busy)
|
|
msleep(slot, &slot->mtx, 0, "sdhciah", 0);
|
|
slot->bus_busy++;
|
|
/* Activate led. */
|
|
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl |= SDHCI_CTRL_LED);
|
|
SDHCI_UNLOCK(slot);
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_release_host(device_t brdev, device_t reqdev)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(reqdev);
|
|
|
|
SDHCI_LOCK(slot);
|
|
/* Deactivate led. */
|
|
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl &= ~SDHCI_CTRL_LED);
|
|
slot->bus_busy--;
|
|
SDHCI_UNLOCK(slot);
|
|
wakeup(slot);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sdhci_cmd_irq(struct sdhci_slot *slot, uint32_t intmask)
|
|
{
|
|
|
|
if (!slot->curcmd) {
|
|
slot_printf(slot, "Got command interrupt 0x%08x, but "
|
|
"there is no active command.\n", intmask);
|
|
sdhci_dumpregs(slot);
|
|
return;
|
|
}
|
|
if (intmask & SDHCI_INT_TIMEOUT)
|
|
slot->curcmd->error = MMC_ERR_TIMEOUT;
|
|
else if (intmask & SDHCI_INT_CRC)
|
|
slot->curcmd->error = MMC_ERR_BADCRC;
|
|
else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
|
|
slot->curcmd->error = MMC_ERR_FIFO;
|
|
|
|
sdhci_finish_command(slot);
|
|
}
|
|
|
|
static void
|
|
sdhci_data_irq(struct sdhci_slot *slot, uint32_t intmask)
|
|
{
|
|
|
|
if (!slot->curcmd) {
|
|
slot_printf(slot, "Got data interrupt 0x%08x, but "
|
|
"there is no active command.\n", intmask);
|
|
sdhci_dumpregs(slot);
|
|
return;
|
|
}
|
|
if (slot->curcmd->data == NULL &&
|
|
(slot->curcmd->flags & MMC_RSP_BUSY) == 0) {
|
|
slot_printf(slot, "Got data interrupt 0x%08x, but "
|
|
"there is no active data operation.\n",
|
|
intmask);
|
|
sdhci_dumpregs(slot);
|
|
return;
|
|
}
|
|
if (intmask & SDHCI_INT_DATA_TIMEOUT)
|
|
slot->curcmd->error = MMC_ERR_TIMEOUT;
|
|
else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
|
|
slot->curcmd->error = MMC_ERR_BADCRC;
|
|
if (slot->curcmd->data == NULL &&
|
|
(intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
|
|
SDHCI_INT_DMA_END))) {
|
|
slot_printf(slot, "Got data interrupt 0x%08x, but "
|
|
"there is busy-only command.\n", intmask);
|
|
sdhci_dumpregs(slot);
|
|
slot->curcmd->error = MMC_ERR_INVALID;
|
|
}
|
|
if (slot->curcmd->error) {
|
|
/* No need to continue after any error. */
|
|
goto done;
|
|
}
|
|
|
|
/* Handle PIO interrupt. */
|
|
if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) {
|
|
if ((slot->opt & SDHCI_PLATFORM_TRANSFER) &&
|
|
SDHCI_PLATFORM_WILL_HANDLE(slot->bus, slot)) {
|
|
SDHCI_PLATFORM_START_TRANSFER(slot->bus, slot, &intmask);
|
|
slot->flags |= PLATFORM_DATA_STARTED;
|
|
} else
|
|
sdhci_transfer_pio(slot);
|
|
}
|
|
/* Handle DMA border. */
|
|
if (intmask & SDHCI_INT_DMA_END) {
|
|
struct mmc_data *data = slot->curcmd->data;
|
|
size_t left;
|
|
|
|
/* Unload DMA buffer... */
|
|
left = data->len - slot->offset;
|
|
if (data->flags & MMC_DATA_READ) {
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_POSTREAD);
|
|
memcpy((u_char*)data->data + slot->offset, slot->dmamem,
|
|
(left < DMA_BLOCK_SIZE)?left:DMA_BLOCK_SIZE);
|
|
} else {
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
}
|
|
/* ... and reload it again. */
|
|
slot->offset += DMA_BLOCK_SIZE;
|
|
left = data->len - slot->offset;
|
|
if (data->flags & MMC_DATA_READ) {
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_PREREAD);
|
|
} else {
|
|
memcpy(slot->dmamem, (u_char*)data->data + slot->offset,
|
|
(left < DMA_BLOCK_SIZE)?left:DMA_BLOCK_SIZE);
|
|
bus_dmamap_sync(slot->dmatag, slot->dmamap,
|
|
BUS_DMASYNC_PREWRITE);
|
|
}
|
|
/* Interrupt aggregation: Mask border interrupt
|
|
* for the last page. */
|
|
if (left == DMA_BLOCK_SIZE) {
|
|
slot->intmask &= ~SDHCI_INT_DMA_END;
|
|
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
|
|
}
|
|
/* Restart DMA. */
|
|
WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr);
|
|
}
|
|
/* We have got all data. */
|
|
if (intmask & SDHCI_INT_DATA_END) {
|
|
if (slot->flags & PLATFORM_DATA_STARTED) {
|
|
slot->flags &= ~PLATFORM_DATA_STARTED;
|
|
SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot);
|
|
} else
|
|
sdhci_finish_data(slot);
|
|
}
|
|
done:
|
|
if (slot->curcmd != NULL && slot->curcmd->error != 0) {
|
|
if (slot->flags & PLATFORM_DATA_STARTED) {
|
|
slot->flags &= ~PLATFORM_DATA_STARTED;
|
|
SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot);
|
|
} else
|
|
sdhci_finish_data(slot);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
sdhci_acmd_irq(struct sdhci_slot *slot)
|
|
{
|
|
uint16_t err;
|
|
|
|
err = RD4(slot, SDHCI_ACMD12_ERR);
|
|
if (!slot->curcmd) {
|
|
slot_printf(slot, "Got AutoCMD12 error 0x%04x, but "
|
|
"there is no active command.\n", err);
|
|
sdhci_dumpregs(slot);
|
|
return;
|
|
}
|
|
slot_printf(slot, "Got AutoCMD12 error 0x%04x\n", err);
|
|
sdhci_reset(slot, SDHCI_RESET_CMD);
|
|
}
|
|
|
|
void
|
|
sdhci_generic_intr(struct sdhci_slot *slot)
|
|
{
|
|
uint32_t intmask;
|
|
|
|
SDHCI_LOCK(slot);
|
|
/* Read slot interrupt status. */
|
|
intmask = RD4(slot, SDHCI_INT_STATUS);
|
|
if (intmask == 0 || intmask == 0xffffffff) {
|
|
SDHCI_UNLOCK(slot);
|
|
return;
|
|
}
|
|
if (sdhci_debug > 2)
|
|
slot_printf(slot, "Interrupt %#x\n", intmask);
|
|
|
|
/* Handle card presence interrupts. */
|
|
if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
|
|
WR4(slot, SDHCI_INT_STATUS, intmask &
|
|
(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE));
|
|
|
|
if (intmask & SDHCI_INT_CARD_REMOVE) {
|
|
if (bootverbose || sdhci_debug)
|
|
slot_printf(slot, "Card removed\n");
|
|
callout_stop(&slot->card_callout);
|
|
taskqueue_enqueue(taskqueue_swi_giant,
|
|
&slot->card_task);
|
|
}
|
|
if (intmask & SDHCI_INT_CARD_INSERT) {
|
|
if (bootverbose || sdhci_debug)
|
|
slot_printf(slot, "Card inserted\n");
|
|
callout_reset(&slot->card_callout, hz / 2,
|
|
sdhci_card_delay, slot);
|
|
}
|
|
intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
|
|
}
|
|
/* Handle command interrupts. */
|
|
if (intmask & SDHCI_INT_CMD_MASK) {
|
|
WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_CMD_MASK);
|
|
sdhci_cmd_irq(slot, intmask & SDHCI_INT_CMD_MASK);
|
|
}
|
|
/* Handle data interrupts. */
|
|
if (intmask & SDHCI_INT_DATA_MASK) {
|
|
WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_DATA_MASK);
|
|
/* Dont call data_irq in case of errored command */
|
|
if ((intmask & SDHCI_INT_CMD_ERROR_MASK) == 0)
|
|
sdhci_data_irq(slot, intmask & SDHCI_INT_DATA_MASK);
|
|
}
|
|
/* Handle AutoCMD12 error interrupt. */
|
|
if (intmask & SDHCI_INT_ACMD12ERR) {
|
|
WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_ACMD12ERR);
|
|
sdhci_acmd_irq(slot);
|
|
}
|
|
intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
|
|
intmask &= ~SDHCI_INT_ACMD12ERR;
|
|
intmask &= ~SDHCI_INT_ERROR;
|
|
/* Handle bus power interrupt. */
|
|
if (intmask & SDHCI_INT_BUS_POWER) {
|
|
WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_BUS_POWER);
|
|
slot_printf(slot,
|
|
"Card is consuming too much power!\n");
|
|
intmask &= ~SDHCI_INT_BUS_POWER;
|
|
}
|
|
/* The rest is unknown. */
|
|
if (intmask) {
|
|
WR4(slot, SDHCI_INT_STATUS, intmask);
|
|
slot_printf(slot, "Unexpected interrupt 0x%08x.\n",
|
|
intmask);
|
|
sdhci_dumpregs(slot);
|
|
}
|
|
|
|
SDHCI_UNLOCK(slot);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(child);
|
|
|
|
switch (which) {
|
|
default:
|
|
return (EINVAL);
|
|
case MMCBR_IVAR_BUS_MODE:
|
|
*result = slot->host.ios.bus_mode;
|
|
break;
|
|
case MMCBR_IVAR_BUS_WIDTH:
|
|
*result = slot->host.ios.bus_width;
|
|
break;
|
|
case MMCBR_IVAR_CHIP_SELECT:
|
|
*result = slot->host.ios.chip_select;
|
|
break;
|
|
case MMCBR_IVAR_CLOCK:
|
|
*result = slot->host.ios.clock;
|
|
break;
|
|
case MMCBR_IVAR_F_MIN:
|
|
*result = slot->host.f_min;
|
|
break;
|
|
case MMCBR_IVAR_F_MAX:
|
|
*result = slot->host.f_max;
|
|
break;
|
|
case MMCBR_IVAR_HOST_OCR:
|
|
*result = slot->host.host_ocr;
|
|
break;
|
|
case MMCBR_IVAR_MODE:
|
|
*result = slot->host.mode;
|
|
break;
|
|
case MMCBR_IVAR_OCR:
|
|
*result = slot->host.ocr;
|
|
break;
|
|
case MMCBR_IVAR_POWER_MODE:
|
|
*result = slot->host.ios.power_mode;
|
|
break;
|
|
case MMCBR_IVAR_VDD:
|
|
*result = slot->host.ios.vdd;
|
|
break;
|
|
case MMCBR_IVAR_CAPS:
|
|
*result = slot->host.caps;
|
|
break;
|
|
case MMCBR_IVAR_TIMING:
|
|
*result = slot->host.ios.timing;
|
|
break;
|
|
case MMCBR_IVAR_MAX_DATA:
|
|
*result = 65535;
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sdhci_generic_write_ivar(device_t bus, device_t child, int which, uintptr_t value)
|
|
{
|
|
struct sdhci_slot *slot = device_get_ivars(child);
|
|
|
|
switch (which) {
|
|
default:
|
|
return (EINVAL);
|
|
case MMCBR_IVAR_BUS_MODE:
|
|
slot->host.ios.bus_mode = value;
|
|
break;
|
|
case MMCBR_IVAR_BUS_WIDTH:
|
|
slot->host.ios.bus_width = value;
|
|
break;
|
|
case MMCBR_IVAR_CHIP_SELECT:
|
|
slot->host.ios.chip_select = value;
|
|
break;
|
|
case MMCBR_IVAR_CLOCK:
|
|
if (value > 0) {
|
|
uint32_t max_clock;
|
|
uint32_t clock;
|
|
int i;
|
|
|
|
max_clock = slot->max_clk;
|
|
clock = max_clock;
|
|
|
|
if (slot->version < SDHCI_SPEC_300) {
|
|
for (i = 0; i < SDHCI_200_MAX_DIVIDER;
|
|
i <<= 1) {
|
|
if (clock <= value)
|
|
break;
|
|
clock >>= 1;
|
|
}
|
|
}
|
|
else {
|
|
for (i = 0; i < SDHCI_300_MAX_DIVIDER;
|
|
i += 2) {
|
|
if (clock <= value)
|
|
break;
|
|
clock = max_clock / (i + 2);
|
|
}
|
|
}
|
|
|
|
slot->host.ios.clock = clock;
|
|
} else
|
|
slot->host.ios.clock = 0;
|
|
break;
|
|
case MMCBR_IVAR_MODE:
|
|
slot->host.mode = value;
|
|
break;
|
|
case MMCBR_IVAR_OCR:
|
|
slot->host.ocr = value;
|
|
break;
|
|
case MMCBR_IVAR_POWER_MODE:
|
|
slot->host.ios.power_mode = value;
|
|
break;
|
|
case MMCBR_IVAR_VDD:
|
|
slot->host.ios.vdd = value;
|
|
break;
|
|
case MMCBR_IVAR_TIMING:
|
|
slot->host.ios.timing = value;
|
|
break;
|
|
case MMCBR_IVAR_CAPS:
|
|
case MMCBR_IVAR_HOST_OCR:
|
|
case MMCBR_IVAR_F_MIN:
|
|
case MMCBR_IVAR_F_MAX:
|
|
case MMCBR_IVAR_MAX_DATA:
|
|
return (EINVAL);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
MODULE_VERSION(sdhci, 1);
|