/* $NetBSD: imx_sdhc.c,v 1.7.4.1 2023/05/28 10:14:35 martin Exp $ */ /*- * Copyright (c) 2019 Genetec Corporation. All rights reserved. * Written by Hashimoto Kenichi for Genetec Corporation. * * 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: imx_sdhc.c,v 1.7.4.1 2023/05/28 10:14:35 martin Exp $"); #include "opt_fdt.h" #include #include #include #include #include #include #include #include #include #include #include static int imx_sdhc_match(device_t, cfdata_t, void *); static void imx_sdhc_attach(device_t, device_t, void *); static int imx_sdhc_card_detect(struct sdhc_softc *); static int imx_sdhc_write_protect(struct sdhc_softc *); struct imx_sdhc_softc { struct sdhc_softc sc_sdhc; 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 clk *sc_clk_per; struct fdtbus_regulator *sc_vmmc_supply; struct fdtbus_gpio_pin *sc_pin_cd; struct fdtbus_gpio_pin *sc_pin_wp; }; CFATTACH_DECL_NEW(imx_sdhc, sizeof(struct imx_sdhc_softc), imx_sdhc_match, imx_sdhc_attach, NULL, NULL); struct imx6_sdhc_config { uint32_t flags; }; static const struct imx6_sdhc_config imx6q_config = { .flags = SDHC_FLAG_BROKEN_ADMA2_ZEROLEN | SDHC_FLAG_NO_BUSY_INTR, }; static const struct imx6_sdhc_config imx7d_config = { .flags = 0 }; static const struct device_compatible_entry compat_data[] = { { .compat = "fsl,imx6q-usdhc", .data = &imx6q_config }, { .compat = "fsl,imx6sx-usdhc", .data = &imx6q_config }, { .compat = "fsl,imx7d-usdhc", .data = &imx7d_config }, DEVICE_COMPAT_EOL }; static int imx_sdhc_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_compatible_match(faa->faa_phandle, compat_data); } static void imx_sdhc_attach(device_t parent, device_t self, void *aux) { struct imx_sdhc_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; const struct imx6_sdhc_config *conf; char intrstr[128]; bus_addr_t addr; bus_size_t size; u_int bus_width; int error; fdtbus_clock_assign(phandle); if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { aprint_error(": couldn't get registers\n"); return; } sc->sc_clk_per = fdtbus_clock_get(phandle, "per"); if (sc->sc_clk_per == NULL) { aprint_error(": couldn't get clock\n"); return; } if (of_getprop_uint32(phandle, "bus-width", &bus_width)) bus_width = 4; sc->sc_vmmc_supply = fdtbus_regulator_acquire(phandle, "vmmc-supply"); conf = of_compatible_lookup(phandle, compat_data)->data; sc->sc_sdhc.sc_dev = self; sc->sc_sdhc.sc_dmat = faa->faa_dmat; sc->sc_sdhc.sc_clkbase = clk_get_rate(sc->sc_clk_per) / 1000; sc->sc_sdhc.sc_flags = SDHC_FLAG_USE_DMA | SDHC_FLAG_NO_PWR0 | SDHC_FLAG_HAVE_DVS | SDHC_FLAG_32BIT_ACCESS | SDHC_FLAG_USDHC; sc->sc_sdhc.sc_flags |= conf->flags; if (bus_width == 8) sc->sc_sdhc.sc_flags |= SDHC_FLAG_8BIT_MODE; if (of_hasprop(phandle, "no-1-8-v")) sc->sc_sdhc.sc_flags |= SDHC_FLAG_NO_1_8_V; sc->sc_sdhc.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 %#" PRIxBUSADDR ": %d", addr, error); return; } sc->sc_bsz = size; sc->sc_pin_cd = fdtbus_gpio_acquire(phandle, "cd-gpios", GPIO_PIN_INPUT); if (sc->sc_pin_cd) { sc->sc_sdhc.sc_vendor_card_detect = imx_sdhc_card_detect; sc->sc_sdhc.sc_flags |= SDHC_FLAG_POLL_CARD_DET; } sc->sc_pin_wp = fdtbus_gpio_acquire(phandle, "wp-gpios", GPIO_PIN_INPUT); if (sc->sc_pin_wp) { sc->sc_sdhc.sc_vendor_write_protect = imx_sdhc_write_protect; } error = clk_enable(sc->sc_clk_per); if (error) { aprint_error(": couldn't enable clock: %d\n", error); return; } if (sc->sc_vmmc_supply != NULL) { error = fdtbus_regulator_enable(sc->sc_vmmc_supply); if (error) { aprint_error(": couldn't enable vmmc supply: %d\n", error); return; } } aprint_naive("\n"); aprint_normal(": SDMMC (%u kHz)\n", sc->sc_sdhc.sc_clkbase); if (sc->sc_sdhc.sc_clkbase == 0) { aprint_error_dev(self, "couldn't determine frequency\n"); return; } if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { aprint_error_dev(self, "failed to decode interrupt\n"); return; } sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_SDMMC, FDT_INTR_MPSAFE, sdhc_intr, &sc->sc_sdhc, device_xname(self)); 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_sdhc, 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(phandle, sc->sc_ih); sc->sc_ih = NULL; return; } } static int imx_sdhc_card_detect(struct sdhc_softc *ssc) { struct imx_sdhc_softc *sc = device_private(ssc->sc_dev); KASSERT(sc->sc_pin_cd != NULL); return fdtbus_gpio_read(sc->sc_pin_cd); } static int imx_sdhc_write_protect(struct sdhc_softc *ssc) { struct imx_sdhc_softc *sc = device_private(ssc->sc_dev); KASSERT(sc->sc_pin_wp != NULL); return fdtbus_gpio_read(sc->sc_pin_wp); }