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arm: allwinner: aw_mmc: Make it possible to unload the module

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While here, add a makefile in sys/modules/allwinner so it is built.
Also add the PNP info so devmatch will load this module automatically.

MFC after:	1 month
This commit is contained in:
Emmanuel Vadot 2020-04-16 16:00:21 +00:00
parent d7ca3f780d
commit cbba9a7bda
3 changed files with 71 additions and 1 deletions
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57
sys/arm/allwinner/aw_mmc.c
View File

@ -163,6 +163,7 @@ static int aw_mmc_probe(device_t);
static int aw_mmc_attach(device_t);
static int aw_mmc_detach(device_t);
static int aw_mmc_setup_dma(struct aw_mmc_softc *);
static void aw_mmc_teardown_dma(struct aw_mmc_softc *sc);
static int aw_mmc_reset(struct aw_mmc_softc *);
static int aw_mmc_init(struct aw_mmc_softc *);
static void aw_mmc_intr(void *);
@ -559,8 +560,46 @@ aw_mmc_attach(device_t dev)
static int
aw_mmc_detach(device_t dev)
{
struct aw_mmc_softc *sc;
device_t d;
return (EBUSY);
sc = device_get_softc(dev);
clk_disable(sc->aw_clk_mmc);
clk_disable(sc->aw_clk_ahb);
hwreset_assert(sc->aw_rst_ahb);
mmc_fdt_gpio_teardown(&sc->mmc_helper);
callout_drain(&sc->aw_timeoutc);
AW_MMC_LOCK(sc);
d = sc->child;
sc->child = NULL;
AW_MMC_UNLOCK(sc);
if (d != NULL)
device_delete_child(sc->aw_dev, d);
aw_mmc_teardown_dma(sc);
mtx_destroy(&sc->aw_mtx);
bus_teardown_intr(dev, sc->aw_res[AW_MMC_IRQRES], sc->aw_intrhand);
bus_release_resources(dev, aw_mmc_res_spec, sc->aw_res);
#ifdef MMCCAM
if (sc->sim != NULL) {
mtx_lock(&sc->sim_mtx);
xpt_bus_deregister(cam_sim_path(sc->sim));
cam_sim_free(sc->sim, FALSE);
mtx_unlock(&sc->sim_mtx);
}
if (sc->devq != NULL)
cam_simq_free(sc->devq);
#endif
return (0);
}
static void
@ -634,6 +673,21 @@ aw_mmc_setup_dma(struct aw_mmc_softc *sc)
return (0);
}
static void
aw_mmc_teardown_dma(struct aw_mmc_softc *sc)
{
bus_dmamap_unload(sc->aw_dma_tag, sc->aw_dma_map);
bus_dmamem_free(sc->aw_dma_tag, sc->aw_dma_desc, sc->aw_dma_map);
if (bus_dma_tag_destroy(sc->aw_dma_tag) != 0)
device_printf(sc->aw_dev, "Cannot destroy the dma tag\n");
bus_dmamap_unload(sc->aw_dma_buf_tag, sc->aw_dma_buf_map);
bus_dmamap_destroy(sc->aw_dma_buf_tag, sc->aw_dma_buf_map);
if (bus_dma_tag_destroy(sc->aw_dma_buf_tag) != 0)
device_printf(sc->aw_dev, "Cannot destroy the dma buf tag\n");
}
static void
aw_dma_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int err)
{
@ -1519,3 +1573,4 @@ DRIVER_MODULE(aw_mmc, simplebus, aw_mmc_driver, aw_mmc_devclass, NULL,
#ifndef MMCCAM
MMC_DECLARE_BRIDGE(aw_mmc);
#endif
SIMPLEBUS_PNP_INFO(compat_data);

1
sys/modules/allwinner/Makefile
View File

@ -2,6 +2,7 @@
# Build modules specific to Allwinner.
SUBDIR = \
aw_mmc \
aw_pwm \
aw_rtc \
aw_rsb \

14
sys/modules/allwinner/aw_mmc/Makefile Normal file
View File

@ -0,0 +1,14 @@
# $FreeBSD$
.PATH: ${SRCTOP}/sys/arm/allwinner
KMOD= aw_mmc
SRCS= aw_mmc.c
SRCS+= \
bus_if.h \
clknode_if.h \
device_if.h \
ofw_bus_if.h
.include <bsd.kmod.mk>