exynos_dwcmmc.c revision 1.2.2.3
1 1.2.2.3 skrll /* $NetBSD: exynos_dwcmmc.c,v 1.2.2.3 2016/07/09 20:24:50 skrll Exp $ */ 2 1.2.2.2 skrll 3 1.2.2.2 skrll /*- 4 1.2.2.2 skrll * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca> 5 1.2.2.2 skrll * All rights reserved. 6 1.2.2.2 skrll * 7 1.2.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 skrll * modification, are permitted provided that the following conditions 9 1.2.2.2 skrll * are met: 10 1.2.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.2.2.2 skrll * 16 1.2.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 skrll * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 skrll * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 skrll * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 skrll * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 skrll * SUCH DAMAGE. 27 1.2.2.2 skrll */ 28 1.2.2.2 skrll 29 1.2.2.2 skrll #include <sys/cdefs.h> 30 1.2.2.3 skrll __KERNEL_RCSID(0, "$NetBSD: exynos_dwcmmc.c,v 1.2.2.3 2016/07/09 20:24:50 skrll Exp $"); 31 1.2.2.2 skrll 32 1.2.2.2 skrll #include <sys/param.h> 33 1.2.2.2 skrll #include <sys/bus.h> 34 1.2.2.2 skrll #include <sys/device.h> 35 1.2.2.2 skrll #include <sys/intr.h> 36 1.2.2.2 skrll #include <sys/systm.h> 37 1.2.2.2 skrll #include <sys/kernel.h> 38 1.2.2.2 skrll #include <sys/mutex.h> 39 1.2.2.2 skrll #include <sys/condvar.h> 40 1.2.2.2 skrll 41 1.2.2.2 skrll #include <arm/samsung/exynos_var.h> 42 1.2.2.2 skrll 43 1.2.2.2 skrll #include <dev/ic/dwc_mmc_var.h> 44 1.2.2.2 skrll #include <dev/fdt/fdtvar.h> 45 1.2.2.2 skrll 46 1.2.2.2 skrll static int exynos_dwcmmc_match(device_t, cfdata_t, void *); 47 1.2.2.2 skrll static void exynos_dwcmmc_attach(device_t, device_t, void *); 48 1.2.2.2 skrll 49 1.2.2.2 skrll static void exynos_dwcmmc_attach_i(device_t); 50 1.2.2.2 skrll 51 1.2.2.2 skrll static int exynos_dwcmmc_card_detect(struct dwc_mmc_softc *); 52 1.2.2.2 skrll 53 1.2.2.2 skrll struct exynos_dwcmmc_softc { 54 1.2.2.2 skrll struct dwc_mmc_softc sc; 55 1.2.2.2 skrll struct clk *sc_clk_biu; 56 1.2.2.2 skrll struct clk *sc_clk_ciu; 57 1.2.2.2 skrll struct fdtbus_gpio_pin *sc_pin_cd; 58 1.2.2.2 skrll }; 59 1.2.2.2 skrll 60 1.2.2.2 skrll CFATTACH_DECL_NEW(exynos_dwcmmc, sizeof(struct dwc_mmc_softc), 61 1.2.2.2 skrll exynos_dwcmmc_match, exynos_dwcmmc_attach, NULL, NULL); 62 1.2.2.2 skrll 63 1.2.2.2 skrll static const char * const exynos_dwcmmc_compat[] = { 64 1.2.2.2 skrll "samsung,exynos5420-dw-mshc-smu", 65 1.2.2.2 skrll "samsung,exynos5420-dw-mshc", 66 1.2.2.2 skrll NULL 67 1.2.2.2 skrll }; 68 1.2.2.2 skrll 69 1.2.2.2 skrll static int 70 1.2.2.2 skrll exynos_dwcmmc_match(device_t parent, cfdata_t cf, void *aux) 71 1.2.2.2 skrll { 72 1.2.2.2 skrll struct fdt_attach_args * const faa = aux; 73 1.2.2.2 skrll 74 1.2.2.2 skrll return of_match_compatible(faa->faa_phandle, exynos_dwcmmc_compat); 75 1.2.2.2 skrll } 76 1.2.2.2 skrll 77 1.2.2.2 skrll static void 78 1.2.2.2 skrll exynos_dwcmmc_attach(device_t parent, device_t self, void *aux) 79 1.2.2.2 skrll { 80 1.2.2.2 skrll struct exynos_dwcmmc_softc *esc = device_private(self); 81 1.2.2.2 skrll struct dwc_mmc_softc *sc = &esc->sc; 82 1.2.2.2 skrll struct fdt_attach_args * const faa = aux; 83 1.2.2.2 skrll const int phandle = faa->faa_phandle; 84 1.2.2.2 skrll char intrstr[128]; 85 1.2.2.2 skrll bus_addr_t addr; 86 1.2.2.2 skrll bus_size_t size; 87 1.2.2.3 skrll u_int ciu_div, fifo_depth; 88 1.2.2.2 skrll int error; 89 1.2.2.2 skrll 90 1.2.2.2 skrll if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 91 1.2.2.2 skrll aprint_error(": couldn't get registers\n"); 92 1.2.2.2 skrll return; 93 1.2.2.2 skrll } 94 1.2.2.2 skrll 95 1.2.2.3 skrll //if (of_getprop_uint32(phandle, "bus-width", &bus_width)) { 96 1.2.2.3 skrll // bus_width = 4; 97 1.2.2.3 skrll //} 98 1.2.2.2 skrll if (of_getprop_uint32(phandle, "fifo-depth", &fifo_depth)) { 99 1.2.2.2 skrll fifo_depth = 64; 100 1.2.2.2 skrll } 101 1.2.2.2 skrll if (of_getprop_uint32(phandle, "samsung,dw-mshc-ciu-div", &ciu_div)) { 102 1.2.2.2 skrll aprint_error(": missing samsung,dw-mshc-ciu-div property\n"); 103 1.2.2.2 skrll return; 104 1.2.2.2 skrll } 105 1.2.2.2 skrll 106 1.2.2.2 skrll esc->sc_clk_biu = fdtbus_clock_get(phandle, "biu"); 107 1.2.2.2 skrll if (esc->sc_clk_biu == NULL) { 108 1.2.2.2 skrll aprint_error(": couldn't get clock biu\n"); 109 1.2.2.2 skrll return; 110 1.2.2.2 skrll } 111 1.2.2.2 skrll esc->sc_clk_ciu = fdtbus_clock_get(phandle, "ciu"); 112 1.2.2.2 skrll if (esc->sc_clk_ciu == NULL) { 113 1.2.2.2 skrll aprint_error(": couldn't get clock ciu\n"); 114 1.2.2.2 skrll return; 115 1.2.2.2 skrll } 116 1.2.2.2 skrll 117 1.2.2.2 skrll error = clk_enable(esc->sc_clk_biu); 118 1.2.2.2 skrll if (error) { 119 1.2.2.2 skrll aprint_error(": couldn't enable clock biu: %d\n", error); 120 1.2.2.2 skrll return; 121 1.2.2.2 skrll } 122 1.2.2.2 skrll error = clk_enable(esc->sc_clk_ciu); 123 1.2.2.2 skrll if (error) { 124 1.2.2.2 skrll aprint_error(": couldn't enable clock ciu: %d\n", error); 125 1.2.2.2 skrll return; 126 1.2.2.2 skrll } 127 1.2.2.2 skrll 128 1.2.2.2 skrll sc->sc_dev = self; 129 1.2.2.2 skrll sc->sc_bst = faa->faa_bst; 130 1.2.2.2 skrll sc->sc_dmat = faa->faa_dmat; 131 1.2.2.2 skrll error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); 132 1.2.2.2 skrll if (error) { 133 1.2.2.2 skrll aprint_error(": couldn't map %#llx: %d\n", 134 1.2.2.2 skrll (uint64_t)addr, error); 135 1.2.2.2 skrll return; 136 1.2.2.2 skrll } 137 1.2.2.2 skrll 138 1.2.2.2 skrll sc->sc_clock_freq = clk_get_rate(esc->sc_clk_ciu) / (ciu_div + 1); 139 1.2.2.2 skrll sc->sc_fifo_depth = fifo_depth; 140 1.2.2.2 skrll 141 1.2.2.2 skrll esc->sc_pin_cd = fdtbus_gpio_acquire(phandle, "cd-gpios", 142 1.2.2.2 skrll GPIO_PIN_INPUT); 143 1.2.2.2 skrll if (esc->sc_pin_cd) { 144 1.2.2.2 skrll sc->sc_card_detect = exynos_dwcmmc_card_detect; 145 1.2.2.2 skrll } 146 1.2.2.2 skrll 147 1.2.2.2 skrll aprint_naive("\n"); 148 1.2.2.2 skrll aprint_normal(": MHS (%u Hz)\n", sc->sc_clock_freq); 149 1.2.2.2 skrll 150 1.2.2.2 skrll if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 151 1.2.2.2 skrll aprint_error_dev(self, "failed to decode interrupt\n"); 152 1.2.2.2 skrll return; 153 1.2.2.2 skrll } 154 1.2.2.2 skrll 155 1.2.2.2 skrll sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_BIO, 0, 156 1.2.2.2 skrll dwc_mmc_intr, sc); 157 1.2.2.2 skrll if (sc->sc_ih == NULL) { 158 1.2.2.2 skrll aprint_error_dev(self, "couldn't establish interrupt on %s\n", 159 1.2.2.2 skrll intrstr); 160 1.2.2.2 skrll return; 161 1.2.2.2 skrll } 162 1.2.2.2 skrll aprint_normal_dev(self, "interrupting on %s\n", intrstr); 163 1.2.2.2 skrll 164 1.2.2.2 skrll config_interrupts(self, exynos_dwcmmc_attach_i); 165 1.2.2.2 skrll } 166 1.2.2.2 skrll 167 1.2.2.2 skrll static void 168 1.2.2.2 skrll exynos_dwcmmc_attach_i(device_t self) 169 1.2.2.2 skrll { 170 1.2.2.2 skrll struct exynos_dwcmmc_softc *esc = device_private(self); 171 1.2.2.2 skrll struct dwc_mmc_softc *sc = &esc->sc; 172 1.2.2.2 skrll 173 1.2.2.2 skrll dwc_mmc_init(sc); 174 1.2.2.2 skrll } 175 1.2.2.2 skrll 176 1.2.2.2 skrll static int 177 1.2.2.2 skrll exynos_dwcmmc_card_detect(struct dwc_mmc_softc *sc) 178 1.2.2.2 skrll { 179 1.2.2.2 skrll struct exynos_dwcmmc_softc *esc = device_private(sc->sc_dev); 180 1.2.2.2 skrll 181 1.2.2.2 skrll KASSERT(esc->sc_pin_cd != NULL); 182 1.2.2.2 skrll 183 1.2.2.2 skrll return fdtbus_gpio_read(esc->sc_pin_cd); 184 1.2.2.2 skrll } 185
Indexes created Tue Oct 28 12:10:06 GMT 2025