tegra_sdhc.c revision 1.14
1 /* $NetBSD: tegra_sdhc.c,v 1.14 2015/12/16 19:46:55 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "locators.h" 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: tegra_sdhc.c,v 1.14 2015/12/16 19:46:55 jmcneill Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/device.h> 37 #include <sys/intr.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 41 #include <dev/sdmmc/sdhcreg.h> 42 #include <dev/sdmmc/sdhcvar.h> 43 #include <dev/sdmmc/sdmmcvar.h> 44 45 #include <arm/nvidia/tegra_reg.h> 46 #include <arm/nvidia/tegra_var.h> 47 48 #include <dev/fdt/fdtvar.h> 49 50 /* XXX */ 51 static int 52 tegra_sdhc_addr2port(bus_addr_t addr) 53 { 54 switch (addr) { 55 case TEGRA_APB_BASE + TEGRA_SDMMC1_OFFSET: 56 return 0; 57 case TEGRA_APB_BASE + TEGRA_SDMMC2_OFFSET: 58 return 1; 59 case TEGRA_APB_BASE + TEGRA_SDMMC3_OFFSET: 60 return 2; 61 case TEGRA_APB_BASE + TEGRA_SDMMC4_OFFSET: 62 return 3; 63 default: 64 return -1; 65 } 66 } 67 68 static int tegra_sdhc_match(device_t, cfdata_t, void *); 69 static void tegra_sdhc_attach(device_t, device_t, void *); 70 71 static int tegra_sdhc_card_detect(struct sdhc_softc *); 72 static int tegra_sdhc_write_protect(struct sdhc_softc *); 73 74 struct tegra_sdhc_softc { 75 struct sdhc_softc sc; 76 77 u_int sc_port; 78 79 bus_space_tag_t sc_bst; 80 bus_space_handle_t sc_bsh; 81 bus_size_t sc_bsz; 82 struct sdhc_host *sc_host; 83 void *sc_ih; 84 85 struct fdtbus_gpio_pin *sc_pin_cd; 86 struct fdtbus_gpio_pin *sc_pin_power; 87 struct fdtbus_gpio_pin *sc_pin_wp; 88 }; 89 90 CFATTACH_DECL_NEW(tegra_sdhc, sizeof(struct tegra_sdhc_softc), 91 tegra_sdhc_match, tegra_sdhc_attach, NULL, NULL); 92 93 static int 94 tegra_sdhc_match(device_t parent, cfdata_t cf, void *aux) 95 { 96 const char * const compatible[] = { "nvidia,tegra124-sdhci", NULL }; 97 struct fdt_attach_args * const faa = aux; 98 99 return of_match_compatible(faa->faa_phandle, compatible); 100 } 101 102 static void 103 tegra_sdhc_attach(device_t parent, device_t self, void *aux) 104 { 105 struct tegra_sdhc_softc * const sc = device_private(self); 106 struct fdt_attach_args * const faa = aux; 107 char intrstr[128]; 108 bus_addr_t addr; 109 bus_size_t size; 110 u_int bus_width; 111 int error; 112 113 if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) { 114 aprint_error(": couldn't get registers\n"); 115 return; 116 } 117 118 if (of_getprop_uint32(faa->faa_phandle, "bus-width", &bus_width)) 119 bus_width = 4; 120 121 sc->sc.sc_dev = self; 122 sc->sc.sc_dmat = faa->faa_dmat; 123 sc->sc.sc_flags = SDHC_FLAG_32BIT_ACCESS | 124 SDHC_FLAG_NO_PWR0 | 125 SDHC_FLAG_NO_CLKBASE | 126 SDHC_FLAG_NO_TIMEOUT | 127 SDHC_FLAG_SINGLE_POWER_WRITE | 128 SDHC_FLAG_USE_DMA | 129 SDHC_FLAG_USE_ADMA2; 130 if (bus_width == 8) { 131 sc->sc.sc_flags |= SDHC_FLAG_8BIT_MODE; 132 } 133 sc->sc.sc_host = &sc->sc_host; 134 135 sc->sc_bst = faa->faa_bst; 136 error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); 137 if (error) { 138 aprint_error(": couldn't map %#llx: %d", (uint64_t)addr, error); 139 return; 140 } 141 sc->sc_bsz = size; 142 sc->sc_port = tegra_sdhc_addr2port(addr); 143 144 sc->sc_pin_power = fdtbus_gpio_acquire(faa->faa_phandle, 145 "power-gpios", GPIO_PIN_OUTPUT); 146 if (sc->sc_pin_power) 147 fdtbus_gpio_write(sc->sc_pin_power, 1); 148 149 sc->sc_pin_cd = fdtbus_gpio_acquire(faa->faa_phandle, 150 "cd-gpios", GPIO_PIN_INPUT); 151 sc->sc_pin_wp = fdtbus_gpio_acquire(faa->faa_phandle, 152 "wp-gpios", GPIO_PIN_INPUT); 153 154 if (sc->sc_pin_cd) { 155 sc->sc.sc_vendor_card_detect = tegra_sdhc_card_detect; 156 sc->sc.sc_flags |= SDHC_FLAG_POLL_CARD_DET; 157 } 158 if (sc->sc_pin_wp) { 159 sc->sc.sc_vendor_write_protect = tegra_sdhc_write_protect; 160 } 161 162 tegra_car_periph_sdmmc_set_rate(sc->sc_port, 204000000); 163 sc->sc.sc_clkbase = tegra_car_periph_sdmmc_rate(sc->sc_port) / 1000; 164 165 aprint_naive("\n"); 166 aprint_normal(": SDMMC%d\n", sc->sc_port + 1); 167 168 if (sc->sc.sc_clkbase == 0) { 169 aprint_error_dev(self, "couldn't determine frequency\n"); 170 return; 171 } 172 173 if (!fdtbus_intr_str(faa->faa_phandle, 0, intrstr, sizeof(intrstr))) { 174 aprint_error_dev(self, "failed to decode interrupt\n"); 175 return; 176 } 177 178 sc->sc_ih = fdtbus_intr_establish(faa->faa_phandle, 0, IPL_SDMMC, 0, 179 sdhc_intr, &sc->sc); 180 if (sc->sc_ih == NULL) { 181 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 182 intrstr); 183 return; 184 } 185 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 186 187 error = sdhc_host_found(&sc->sc, sc->sc_bst, sc->sc_bsh, sc->sc_bsz); 188 if (error) { 189 aprint_error_dev(self, "couldn't initialize host, error = %d\n", 190 error); 191 fdtbus_intr_disestablish(faa->faa_phandle, sc->sc_ih); 192 sc->sc_ih = NULL; 193 return; 194 } 195 } 196 197 static int 198 tegra_sdhc_card_detect(struct sdhc_softc *ssc) 199 { 200 struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev); 201 202 KASSERT(sc->sc_pin_cd != NULL); 203 204 return fdtbus_gpio_read(sc->sc_pin_cd); 205 } 206 207 static int 208 tegra_sdhc_write_protect(struct sdhc_softc *ssc) 209 { 210 struct tegra_sdhc_softc *sc = device_private(ssc->sc_dev); 211 212 KASSERT(sc->sc_pin_wp != NULL); 213 214 return fdtbus_gpio_read(sc->sc_pin_wp); 215 } 216
Indexes created Mon Oct 27 08:10:08 GMT 2025