/* $NetBSD: dwcmmc_fdt.c,v 1.8.2.2 2020/02/25 18:40:43 martin Exp $ */ /*- * Copyright (c) 2015-2018 Jared McNeill * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include __KERNEL_RCSID(0, "$NetBSD: dwcmmc_fdt.c,v 1.8.2.2 2020/02/25 18:40:43 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include static int dwcmmc_fdt_match(device_t, cfdata_t, void *); static void dwcmmc_fdt_attach(device_t, device_t, void *); static void dwcmmc_fdt_pre_power_on(struct dwc_mmc_softc *); static void dwcmmc_fdt_post_power_on(struct dwc_mmc_softc *); static int dwcmmc_fdt_card_detect(struct dwc_mmc_softc *); static int dwcmmc_fdt_bus_clock(struct dwc_mmc_softc *, int); static int dwcmmc_fdt_signal_voltage(struct dwc_mmc_softc *, int); struct dwcmmc_fdt_config { u_int ciu_div; u_int flags; uint32_t intr_cardmask; }; static const struct dwcmmc_fdt_config dwcmmc_rk3288_config = { .ciu_div = 2, .flags = DWC_MMC_F_USE_HOLD_REG | DWC_MMC_F_DMA, .intr_cardmask = __BIT(24), }; static const struct of_compat_data compat_data[] = { { "rockchip,rk3288-dw-mshc", (uintptr_t)&dwcmmc_rk3288_config }, { NULL } }; struct dwcmmc_fdt_softc { struct dwc_mmc_softc sc; struct clk *sc_clk_biu; struct clk *sc_clk_ciu; struct fdtbus_gpio_pin *sc_pin_cd; const struct dwcmmc_fdt_config *sc_conf; u_int sc_ciu_div; struct fdtbus_regulator *sc_vqmmc; struct fdtbus_mmc_pwrseq *sc_pwrseq; }; CFATTACH_DECL_NEW(dwcmmc_fdt, sizeof(struct dwcmmc_fdt_softc), dwcmmc_fdt_match, dwcmmc_fdt_attach, NULL, NULL); static int dwcmmc_fdt_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_match_compat_data(faa->faa_phandle, compat_data); } static void dwcmmc_fdt_attach(device_t parent, device_t self, void *aux) { struct dwcmmc_fdt_softc *esc = device_private(self); struct dwc_mmc_softc *sc = &esc->sc; struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; char intrstr[128]; u_int fifo_depth; bus_addr_t addr; bus_size_t size; int error; if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { aprint_error(": couldn't get registers\n"); return; } if (of_getprop_uint32(phandle, "fifo-depth", &fifo_depth)) fifo_depth = 0; fdtbus_clock_assign(phandle); esc->sc_clk_biu = fdtbus_clock_get(phandle, "biu"); if (esc->sc_clk_biu == NULL) { aprint_error(": couldn't get clock biu\n"); return; } esc->sc_clk_ciu = fdtbus_clock_get(phandle, "ciu"); if (esc->sc_clk_ciu == NULL) { aprint_error(": couldn't get clock ciu\n"); return; } error = clk_enable(esc->sc_clk_biu); if (error) { aprint_error(": couldn't enable clock biu: %d\n", error); return; } error = clk_enable(esc->sc_clk_ciu); if (error) { aprint_error(": couldn't enable clock ciu: %d\n", error); return; } esc->sc_vqmmc = fdtbus_regulator_acquire(phandle, "vqmmc-supply"); esc->sc_pwrseq = fdtbus_mmc_pwrseq_get(phandle); sc->sc_dev = self; sc->sc_bst = faa->faa_bst; sc->sc_dmat = faa->faa_dmat; error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); if (error) { aprint_error(": couldn't map %#" PRIx64 ": %d\n", (uint64_t)addr, error); return; } esc->sc_conf = (void *)of_search_compatible(phandle, compat_data)->data; if (of_getprop_uint32(phandle, "max-frequency", &sc->sc_clock_freq) != 0) sc->sc_clock_freq = UINT_MAX; if (of_getprop_uint32(phandle, "bus-width", &sc->sc_bus_width) != 0) sc->sc_bus_width = 4; sc->sc_fifo_depth = fifo_depth; sc->sc_intr_cardmask = esc->sc_conf->intr_cardmask; sc->sc_ciu_div = esc->sc_conf->ciu_div; sc->sc_flags = esc->sc_conf->flags; sc->sc_pre_power_on = dwcmmc_fdt_pre_power_on; sc->sc_post_power_on = dwcmmc_fdt_post_power_on; sc->sc_bus_clock = dwcmmc_fdt_bus_clock; sc->sc_signal_voltage = dwcmmc_fdt_signal_voltage; esc->sc_pin_cd = fdtbus_gpio_acquire(phandle, "cd-gpios", GPIO_PIN_INPUT); if (esc->sc_pin_cd) sc->sc_card_detect = dwcmmc_fdt_card_detect; aprint_naive("\n"); aprint_normal(": DesignWare SD/MMC\n"); if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { aprint_error_dev(self, "failed to decode interrupt\n"); return; } if (dwc_mmc_init(sc) != 0) return; sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_BIO, 0, dwc_mmc_intr, sc); if (sc->sc_ih == NULL) { aprint_error_dev(self, "couldn't establish interrupt on %s\n", intrstr); return; } aprint_normal_dev(self, "interrupting on %s\n", intrstr); } static void dwcmmc_fdt_pre_power_on(struct dwc_mmc_softc *sc) { struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); if (esc->sc_pwrseq != NULL) fdtbus_mmc_pwrseq_pre_power_on(esc->sc_pwrseq); } static void dwcmmc_fdt_post_power_on(struct dwc_mmc_softc *sc) { struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); if (esc->sc_pwrseq != NULL) fdtbus_mmc_pwrseq_post_power_on(esc->sc_pwrseq); } static int dwcmmc_fdt_card_detect(struct dwc_mmc_softc *sc) { struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); KASSERT(esc->sc_pin_cd != NULL); return fdtbus_gpio_read(esc->sc_pin_cd); } static int dwcmmc_fdt_bus_clock(struct dwc_mmc_softc *sc, int rate) { struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); const u_int ciu_div = sc->sc_ciu_div > 0 ? sc->sc_ciu_div : 1; int error; error = clk_set_rate(esc->sc_clk_ciu, 1000 * rate * ciu_div); if (error != 0) { aprint_error_dev(sc->sc_dev, "failed to set rate to %u kHz: %d\n", rate * ciu_div, error); return error; } sc->sc_clock_freq = clk_get_rate(esc->sc_clk_ciu); aprint_debug_dev(sc->sc_dev, "set clock rate to %u kHz (target %u kHz)\n", sc->sc_clock_freq, rate); return 0; } static int dwcmmc_fdt_signal_voltage(struct dwc_mmc_softc *sc, int signal_voltage) { struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); u_int uvol; int error; if (esc->sc_vqmmc == NULL) return 0; switch (signal_voltage) { case SDMMC_SIGNAL_VOLTAGE_180: uvol = 1800000; break; case SDMMC_SIGNAL_VOLTAGE_330: uvol = 3300000; break; default: return EINVAL; } error = fdtbus_regulator_supports_voltage(esc->sc_vqmmc, uvol, uvol); if (error != 0) return 0; error = fdtbus_regulator_set_voltage(esc->sc_vqmmc, uvol, uvol); if (error != 0) return error; return fdtbus_regulator_enable(esc->sc_vqmmc); }