Function aw_mmc_attach

freebsd/arm/allwinner/aw_mmc.c:436–578

}

static int
aw_mmc_attach(device_t dev)
{
	struct aw_mmc_softc *sc;
	struct sysctl_ctx_list *ctx;
	struct sysctl_oid_list *tree;
	int error;

	sc = device_get_softc(dev);
	sc->aw_dev = dev;

	sc->aw_mmc_conf = (struct aw_mmc_conf *)ofw_bus_search_compatible(dev, compat_data)->ocd_data;

#ifndef MMCCAM
	sc->aw_req = NULL;
#endif
	if (bus_alloc_resources(dev, aw_mmc_res_spec, sc->aw_res) != 0) {
		device_printf(dev, "cannot allocate device resources\n");
		return (ENXIO);
	}
	if (bus_setup_intr(dev, sc->aw_res[AW_MMC_IRQRES],
	    INTR_TYPE_NET | INTR_MPSAFE, NULL, aw_mmc_intr, sc,
	    &sc->aw_intrhand)) {
		bus_release_resources(dev, aw_mmc_res_spec, sc->aw_res);
		device_printf(dev, "cannot setup interrupt handler\n");
		return (ENXIO);
	}
	mtx_init(&sc->aw_mtx, device_get_nameunit(sc->aw_dev), "aw_mmc",
	    MTX_DEF);
	callout_init_mtx(&sc->aw_timeoutc, &sc->aw_mtx, 0);

	/* De-assert reset */
	if (hwreset_get_by_ofw_name(dev, 0, "ahb", &sc->aw_rst_ahb) == 0) {
		error = hwreset_deassert(sc->aw_rst_ahb);
		if (error != 0) {
			device_printf(dev, "cannot de-assert reset\n");
			goto fail;
		}
	}

	/* Activate the module clock. */
	error = clk_get_by_ofw_name(dev, 0, "ahb", &sc->aw_clk_ahb);
	if (error != 0) {
		device_printf(dev, "cannot get ahb clock\n");
		goto fail;
	}
	error = clk_enable(sc->aw_clk_ahb);
	if (error != 0) {
		device_printf(dev, "cannot enable ahb clock\n");
		goto fail;
	}
	error = clk_get_by_ofw_name(dev, 0, "mmc", &sc->aw_clk_mmc);
	if (error != 0) {
		device_printf(dev, "cannot get mmc clock\n");
		goto fail;
	}
	error = clk_set_freq(sc->aw_clk_mmc, CARD_ID_FREQUENCY,
	    CLK_SET_ROUND_DOWN);