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at91_mci: Use real interrupt

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Execute at91_mci_intr() in interrupt context.  Synchronize MMC requests
via RTEMS interrupt lock.
This commit is contained in:
Sebastian Huber 2018-04-26 15:23:08 +02:00
parent c7e162abd8
commit 3fac9e9cd4
1 changed files with 51 additions and 0 deletions
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51
freebsd/sys/arm/at91/at91_mci.c
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@ -70,6 +70,7 @@ __FBSDID("$FreeBSD$");
#endif /* __rtems__ */
#if defined(__rtems__) && defined(LIBBSP_ARM_ATSAM_BSP_H)
#ifdef __rtems__
#include <rtems/irq-extension.h>
#include <libchip/chip.h>
#define AT91_MCI_HAS_4WIRE 1
@ -150,7 +151,11 @@ static sXdmad *pXdmad = &XDMAD_Instance;
* original driver. But that would need some rework. */
#endif /* __rtems__ */
#ifndef __rtems__
static int mci_debug;
#else /* __rtems__ */
#define mci_debug 0
#endif /* __rtems__ */
struct at91_mci_softc {
void *intrhand; /* Interrupt handle */
@ -169,6 +174,9 @@ struct at91_mci_softc {
struct resource *irq_res; /* IRQ resource */
struct resource *mem_res; /* Memory resource */
struct mtx sc_mtx;
#ifdef __rtems__
RTEMS_INTERRUPT_LOCK_MEMBER(sc_lock)
#endif /* __rtems__ */
bus_dma_tag_t dmatag;
struct mmc_host host;
int bus_busy;
@ -204,6 +212,7 @@ static void at91_mci_read_done(struct at91_mci_softc *sc, uint32_t sr);
static void at91_mci_write_done(struct at91_mci_softc *sc, uint32_t sr);
#endif /* __rtems__ */
#ifndef __rtems__
#define AT91_MCI_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define AT91_MCI_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define AT91_MCI_LOCK_INIT(_sc) \
@ -212,6 +221,23 @@ static void at91_mci_write_done(struct at91_mci_softc *sc, uint32_t sr);
#define AT91_MCI_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
#define AT91_MCI_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
#define AT91_MCI_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
#else /* __rtems__ */
#define AT91_MCI_LOCK(_sc) \
rtems_interrupt_lock_context at91_mci_lock_context; \
rtems_interrupt_lock_acquire(&(_sc)->sc_lock, &at91_mci_lock_context)
#define AT91_MCI_UNLOCK(_sc) \
rtems_interrupt_lock_release(&(_sc)->sc_lock, &at91_mci_lock_context)
#define AT91_MCI_LOCK_INIT(_sc) \
rtems_interrupt_lock_initialize(&(_sc)->sc_lock, \
device_get_nameunit((_sc)->dev))
#define AT91_MCI_LOCK_DESTROY(_sc) \
rtems_interrupt_lock_destroy(&(_sc)->sc_mtx)
#define AT91_MCI_BUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define AT91_MCI_BUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define AT91_MCI_BUS_LOCK_INIT(_sc) \
mtx_init(&_sc->sc_mtx, device_get_nameunit((_sc)->dev), \
"mci", MTX_DEF)
#endif /* __rtems__ */
static inline uint32_t
RD4(struct at91_mci_softc *sc, bus_size_t off)
@ -482,6 +508,7 @@ at91_mci_attach(device_t dev)
if (rc != XDMAD_OK)
goto out;
AT91_MCI_BUS_LOCK_INIT(sc);
#endif /* __rtems__ */
AT91_MCI_LOCK_INIT(sc);
@ -516,8 +543,14 @@ at91_mci_attach(device_t dev)
/*
* Activate the interrupt
*/
#ifndef __rtems__
err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, at91_mci_intr, sc, &sc->intrhand);
#else /* __rtems__ */
err = rtems_interrupt_handler_install(rman_get_start(sc->irq_res),
device_get_nameunit(dev), RTEMS_INTERRUPT_SHARED, at91_mci_intr,
sc);
#endif /* __rtems__ */
if (err) {
AT91_MCI_LOCK_DESTROY(sc);
goto out;
@ -545,8 +578,10 @@ at91_mci_attach(device_t dev)
CTLFLAG_RW, &sc->allow_overclock, 0,
"Allow up to 30MHz clock for 25MHz request when next highest speed 15MHz or less.");
#ifndef __rtems__
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "debug",
CTLFLAG_RWTUN, &mci_debug, 0, "enable debug output");
#endif /* __rtems__ */
/*
* Our real min freq is master_clock/512, but upper driver layers are
@ -1119,11 +1154,19 @@ at91_mci_acquire_host(device_t brdev, device_t reqdev)
struct at91_mci_softc *sc = device_get_softc(brdev);
int err = 0;
#ifndef __rtems__
AT91_MCI_LOCK(sc);
#else /* __rtems__ */
AT91_MCI_BUS_LOCK(sc);
#endif /* __rtems__ */
while (sc->bus_busy)
msleep(sc, &sc->sc_mtx, PZERO, "mciah", hz / 5);
sc->bus_busy++;
#ifndef __rtems__
AT91_MCI_UNLOCK(sc);
#else /* __rtems__ */
AT91_MCI_BUS_UNLOCK(sc);
#endif /* __rtems__ */
return (err);
}
@ -1132,10 +1175,18 @@ at91_mci_release_host(device_t brdev, device_t reqdev)
{
struct at91_mci_softc *sc = device_get_softc(brdev);
#ifndef __rtems__
AT91_MCI_LOCK(sc);
#else /* __rtems__ */
AT91_MCI_BUS_LOCK(sc);
#endif /* __rtems__ */
sc->bus_busy--;
wakeup(sc);
#ifndef __rtems__
AT91_MCI_UNLOCK(sc);
#else /* __rtems__ */
AT91_MCI_BUS_UNLOCK(sc);
#endif /* __rtems__ */
return (0);
}