/* $NetBSD: cycv_dwcmmc.c,v 1.3.4.1 2020/03/21 20:17:49 martin 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. */ #include __KERNEL_RCSID(0, "$NetBSD: cycv_dwcmmc.c,v 1.3.4.1 2020/03/21 20:17:49 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #define FIFO_REG 0x200 static int cycv_dwcmmc_match(device_t, cfdata_t, void *); static void cycv_dwcmmc_attach(device_t, device_t, void *); static int cycv_dwcmmc_card_detect(struct dwc_mmc_softc *); struct cycv_dwcmmc_softc { struct dwc_mmc_softc sc; int sc_phandle; bool sc_non_removable; bool sc_broken_cd; struct fdtbus_gpio_pin *sc_gpio_cd; bool sc_gpio_cd_inverted; struct clk *sc_clk_biu; struct clk *sc_clk_ciu; }; CFATTACH_DECL_NEW(cycv_dwcmmc, sizeof(struct dwc_mmc_softc), cycv_dwcmmc_match, cycv_dwcmmc_attach, NULL, NULL); static const char * const cycv_dwcmmc_compat[] = { "altr,socfpga-dw-mshc", NULL }; static int cycv_dwcmmc_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_match_compatible(faa->faa_phandle, cycv_dwcmmc_compat); } static void cycv_dwcmmc_attach(device_t parent, device_t self, void *aux) { struct cycv_dwcmmc_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]; bus_addr_t addr; bus_size_t size; u_int fifo_depth; 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 = 64; } 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; } 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 %#llx: %d\n", (uint64_t)addr, error); return; } sc->sc_clock_freq = clk_get_rate(esc->sc_clk_ciu); sc->sc_fifo_depth = fifo_depth; sc->sc_fifo_reg = FIFO_REG; sc->sc_flags = DWC_MMC_F_USE_HOLD_REG | DWC_MMC_F_DMA; sc->sc_intr_cardmask = DWC_MMC_INT_SDIO_INT(8); sc->sc_card_detect = cycv_dwcmmc_card_detect; sc->sc_write_protect = NULL; esc->sc_phandle = phandle; esc->sc_gpio_cd = fdtbus_gpio_acquire(phandle, "cd-gpios", GPIO_PIN_INPUT); esc->sc_gpio_cd_inverted = of_hasprop(phandle, "cd-inverted") ? 0 : 1; esc->sc_non_removable = of_hasprop(phandle, "non-removable"); esc->sc_broken_cd = of_hasprop(phandle, "broken-cd"); aprint_naive("\n"); aprint_normal(": MHS (%u Hz)\n", sc->sc_clock_freq); 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 int cycv_dwcmmc_card_detect(struct dwc_mmc_softc *sc) { struct cycv_dwcmmc_softc *esc = device_private(sc->sc_dev); int val; if (esc->sc_non_removable || esc->sc_broken_cd) { return 1; } else if (esc->sc_gpio_cd != NULL) { val = fdtbus_gpio_read(esc->sc_gpio_cd); if (esc->sc_gpio_cd_inverted) val = !val; return val; } else { return 1; } }