/* $NetBSD: tegra_sdhc.c,v 1.22 2018/07/16 23:11:47 christos Exp $ */ /*- * Copyright (c) 2015 Jared D. 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. */ #define TEGRA_SDHC_NO_SDR104 #include "locators.h" #include __KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.22 2018/07/16 23:11:47 christos Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include static int tegra_sdhc_match(device_t, cfdata_t, void *); static void tegra_sdhc_attach(device_t, device_t, void *); static int tegra_sdhc_card_detect(struct sdhc_softc *); static int tegra_sdhc_write_protect(struct sdhc_softc *); static int tegra_sdhc_signal_voltage(struct sdhc_softc *, int); struct tegra_sdhc_softc { struct sdhc_softc sc; struct clk *sc_clk; struct fdtbus_reset *sc_rst; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; bus_size_t sc_bsz; struct sdhc_host *sc_host; void *sc_ih; struct fdtbus_gpio_pin *sc_pin_cd; struct fdtbus_gpio_pin *sc_pin_power; struct fdtbus_gpio_pin *sc_pin_wp; struct fdtbus_regulator *sc_reg_vqmmc; }; CFATTACH_DECL_NEW(tegra_sdhc, sizeof(struct tegra_sdhc_softc), tegra_sdhc_match, tegra_sdhc_attach, NULL, NULL); static int tegra_sdhc_match(device_t parent, cfdata_t cf, void *aux) { const char * const compatible[] = { "nvidia,tegra210-sdhci", "nvidia,tegra124-sdhci", NULL }; struct fdt_attach_args * const faa = aux; return of_match_compatible(faa->faa_phandle, compatible); } static void tegra_sdhc_attach(device_t parent, device_t self, void *aux) { struct tegra_sdhc_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; char intrstr[128]; bus_addr_t addr; bus_size_t size; u_int bus_width; int error; if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) { aprint_error(": couldn't get registers\n"); return; } if (of_getprop_uint32(faa->faa_phandle, "bus-width", &bus_width)) bus_width = 4; sc->sc.sc_dev = self; sc->sc.sc_dmat = faa->faa_dmat; sc->sc.sc_flags = SDHC_FLAG_32BIT_ACCESS | SDHC_FLAG_NO_PWR0 | SDHC_FLAG_NO_CLKBASE | SDHC_FLAG_NO_TIMEOUT | SDHC_FLAG_SINGLE_POWER_WRITE | SDHC_FLAG_NO_HS_BIT | SDHC_FLAG_USE_DMA | SDHC_FLAG_USE_ADMA2; if (bus_width == 8) { sc->sc.sc_flags |= SDHC_FLAG_8BIT_MODE; } sc->sc.sc_host = &sc->sc_host; sc->sc_bst = faa->faa_bst; error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); if (error) { aprint_error(": couldn't map %#" PRIx64 ": %d", (uint64_t)addr, error); return; } sc->sc_bsz = size; #ifdef TEGRA_SDHC_NO_SDR104 /* XXX SDR104 requires a custom tuning method on Tegra K1 */ sc->sc.sc_flags |= SDHC_FLAG_HOSTCAPS; sc->sc.sc_caps = bus_space_read_4(sc->sc_bst, sc->sc_bsh, SDHC_CAPABILITIES); sc->sc.sc_caps2 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, SDHC_CAPABILITIES2); sc->sc.sc_caps2 &= ~SDHC_SDR104_SUPP; #endif sc->sc_pin_power = fdtbus_gpio_acquire(faa->faa_phandle, "power-gpios", GPIO_PIN_OUTPUT); if (sc->sc_pin_power) fdtbus_gpio_write(sc->sc_pin_power, 1); sc->sc_pin_cd = fdtbus_gpio_acquire(faa->faa_phandle, "cd-gpios", GPIO_PIN_INPUT); sc->sc_pin_wp = fdtbus_gpio_acquire(faa->faa_phandle, "wp-gpios", GPIO_PIN_INPUT); if (sc->sc_pin_cd) { sc->sc.sc_vendor_card_detect = tegra_sdhc_card_detect; sc->sc.sc_flags |= SDHC_FLAG_POLL_CARD_DET; } if (sc->sc_pin_wp) { sc->sc.sc_vendor_write_protect = tegra_sdhc_write_protect; } sc->sc_reg_vqmmc = fdtbus_regulator_acquire(faa->faa_phandle, "vqmmc-supply"); if (sc->sc_reg_vqmmc) { sc->sc.sc_vendor_signal_voltage = tegra_sdhc_signal_voltage; } else { /* Regulator required for UHS signaling */ sc->sc.sc_flags |= SDHC_FLAG_HOSTCAPS; sc->sc.sc_caps = bus_space_read_4(sc->sc_bst, sc->sc_bsh, SDHC_CAPABILITIES); sc->sc.sc_caps2 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, SDHC_CAPABILITIES2); sc->sc.sc_caps2 &= ~(SDHC_SDR50_SUPP|SDHC_SDR104_SUPP|SDHC_DDR50_SUPP); } sc->sc_clk = fdtbus_clock_get_index(faa->faa_phandle, 0); if (sc->sc_clk == NULL) { aprint_error(": couldn't get clock\n"); return; } sc->sc_rst = fdtbus_reset_get(faa->faa_phandle, "sdhci"); if (sc->sc_rst == NULL) { aprint_error(": couldn't get reset\n"); return; } fdtbus_reset_assert(sc->sc_rst); #ifdef TEGRA_SDHC_NO_SDR104 error = clk_set_rate(sc->sc_clk, 100000000); #else error = clk_set_rate(sc->sc_clk, 204000000); #endif if (error) { aprint_error(": couldn't set frequency: %d\n", error); return; } error = clk_enable(sc->sc_clk); if (error) { aprint_error(": couldn't enable clock: %d\n", error); return; } fdtbus_reset_deassert(sc->sc_rst); sc->sc.sc_clkbase = clk_get_rate(sc->sc_clk) / 1000; aprint_naive("\n"); aprint_normal(": SDMMC (%u kHz)\n", sc->sc.sc_clkbase); if (sc->sc.sc_clkbase == 0) { aprint_error_dev(self, "couldn't determine frequency\n"); return; } if (!fdtbus_intr_str(faa->faa_phandle, 0, intrstr, sizeof(intrstr))) { aprint_error_dev(self, "failed to decode interrupt\n"); return; } sc->sc_ih = fdtbus_intr_establish(faa->faa_phandle, 0, IPL_SDMMC, 0, sdhc_intr, &sc->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); error = sdhc_host_found(&sc->sc, sc->sc_bst, sc->sc_bsh, sc->sc_bsz); if (error) { aprint_error_dev(self, "couldn't initialize host, error = %d\n", error); fdtbus_intr_disestablish(faa->faa_phandle, sc->sc_ih); sc->sc_ih = NULL; return; } } static int tegra_sdhc_card_detect(struct sdhc_softc *ssc) { struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev); KASSERT(sc->sc_pin_cd != NULL); return fdtbus_gpio_read(sc->sc_pin_cd); } static int tegra_sdhc_write_protect(struct sdhc_softc *ssc) { struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev); KASSERT(sc->sc_pin_wp != NULL); return fdtbus_gpio_read(sc->sc_pin_wp); } static int tegra_sdhc_signal_voltage(struct sdhc_softc *ssc, int signal_voltage) { struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev); u_int uvol; int error; KASSERT(sc->sc_reg_vqmmc != NULL); switch (signal_voltage) { case SDMMC_SIGNAL_VOLTAGE_330: uvol = 3300000; break; case SDMMC_SIGNAL_VOLTAGE_180: uvol = 1800000; break; default: return EINVAL; } error = fdtbus_regulator_set_voltage(sc->sc_reg_vqmmc, uvol, uvol); if (error != 0) return error; return fdtbus_regulator_enable(sc->sc_reg_vqmmc); }