dwcmmc_fdt.c revision 1.9
1 /* $NetBSD: dwcmmc_fdt.c,v 1.9 2020/01/01 11:21:15 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015-2018 Jared 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 <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: dwcmmc_fdt.c,v 1.9 2020/01/01 11:21:15 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/intr.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/mutex.h> 39 #include <sys/condvar.h> 40 #include <sys/gpio.h> 41 42 #include <dev/ic/dwc_mmc_var.h> 43 #include <dev/sdmmc/sdmmcchip.h> 44 #include <dev/fdt/fdtvar.h> 45 46 static int dwcmmc_fdt_match(device_t, cfdata_t, void *); 47 static void dwcmmc_fdt_attach(device_t, device_t, void *); 48 49 static void dwcmmc_fdt_pre_power_on(struct dwc_mmc_softc *); 50 static void dwcmmc_fdt_post_power_on(struct dwc_mmc_softc *); 51 52 static int dwcmmc_fdt_card_detect(struct dwc_mmc_softc *); 53 static int dwcmmc_fdt_bus_clock(struct dwc_mmc_softc *, int); 54 static int dwcmmc_fdt_signal_voltage(struct dwc_mmc_softc *, int); 55 56 struct dwcmmc_fdt_config { 57 u_int ciu_div; 58 u_int flags; 59 }; 60 61 static const struct dwcmmc_fdt_config dwcmmc_rk3288_config = { 62 .ciu_div = 2, 63 .flags = DWC_MMC_F_USE_HOLD_REG | 64 DWC_MMC_F_DMA, 65 }; 66 67 static const struct of_compat_data compat_data[] = { 68 { "rockchip,rk3288-dw-mshc", (uintptr_t)&dwcmmc_rk3288_config }, 69 { NULL } 70 }; 71 72 struct dwcmmc_fdt_softc { 73 struct dwc_mmc_softc sc; 74 struct clk *sc_clk_biu; 75 struct clk *sc_clk_ciu; 76 struct fdtbus_gpio_pin *sc_pin_cd; 77 const struct dwcmmc_fdt_config *sc_conf; 78 u_int sc_ciu_div; 79 struct fdtbus_regulator *sc_vqmmc; 80 struct fdtbus_mmc_pwrseq *sc_pwrseq; 81 }; 82 83 CFATTACH_DECL_NEW(dwcmmc_fdt, sizeof(struct dwcmmc_fdt_softc), 84 dwcmmc_fdt_match, dwcmmc_fdt_attach, NULL, NULL); 85 86 static int 87 dwcmmc_fdt_match(device_t parent, cfdata_t cf, void *aux) 88 { 89 struct fdt_attach_args * const faa = aux; 90 91 return of_match_compat_data(faa->faa_phandle, compat_data); 92 } 93 94 static void 95 dwcmmc_fdt_attach(device_t parent, device_t self, void *aux) 96 { 97 struct dwcmmc_fdt_softc *esc = device_private(self); 98 struct dwc_mmc_softc *sc = &esc->sc; 99 struct fdt_attach_args * const faa = aux; 100 const int phandle = faa->faa_phandle; 101 char intrstr[128]; 102 u_int fifo_depth; 103 bus_addr_t addr; 104 bus_size_t size; 105 int error; 106 107 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 108 aprint_error(": couldn't get registers\n"); 109 return; 110 } 111 112 if (of_getprop_uint32(phandle, "fifo-depth", &fifo_depth)) 113 fifo_depth = 0; 114 115 fdtbus_clock_assign(phandle); 116 117 esc->sc_clk_biu = fdtbus_clock_get(phandle, "biu"); 118 if (esc->sc_clk_biu == NULL) { 119 aprint_error(": couldn't get clock biu\n"); 120 return; 121 } 122 esc->sc_clk_ciu = fdtbus_clock_get(phandle, "ciu"); 123 if (esc->sc_clk_ciu == NULL) { 124 aprint_error(": couldn't get clock ciu\n"); 125 return; 126 } 127 128 error = clk_enable(esc->sc_clk_biu); 129 if (error) { 130 aprint_error(": couldn't enable clock biu: %d\n", error); 131 return; 132 } 133 error = clk_enable(esc->sc_clk_ciu); 134 if (error) { 135 aprint_error(": couldn't enable clock ciu: %d\n", error); 136 return; 137 } 138 139 esc->sc_vqmmc = fdtbus_regulator_acquire(phandle, "vqmmc-supply"); 140 esc->sc_pwrseq = fdtbus_mmc_pwrseq_get(phandle); 141 142 sc->sc_dev = self; 143 sc->sc_bst = faa->faa_bst; 144 sc->sc_dmat = faa->faa_dmat; 145 error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh); 146 if (error) { 147 aprint_error(": couldn't map %#" PRIx64 ": %d\n", 148 (uint64_t)addr, error); 149 return; 150 } 151 esc->sc_conf = (void *)of_search_compatible(phandle, compat_data)->data; 152 153 if (of_getprop_uint32(phandle, "max-frequency", &sc->sc_clock_freq) != 0) 154 sc->sc_clock_freq = UINT_MAX; 155 if (of_getprop_uint32(phandle, "bus-width", &sc->sc_bus_width) != 0) 156 sc->sc_bus_width = 4; 157 158 sc->sc_fifo_depth = fifo_depth; 159 sc->sc_flags = esc->sc_conf->flags; 160 sc->sc_pre_power_on = dwcmmc_fdt_pre_power_on; 161 sc->sc_post_power_on = dwcmmc_fdt_post_power_on; 162 sc->sc_bus_clock = dwcmmc_fdt_bus_clock; 163 sc->sc_signal_voltage = dwcmmc_fdt_signal_voltage; 164 165 esc->sc_pin_cd = fdtbus_gpio_acquire(phandle, "cd-gpios", 166 GPIO_PIN_INPUT); 167 if (esc->sc_pin_cd) 168 sc->sc_card_detect = dwcmmc_fdt_card_detect; 169 170 aprint_naive("\n"); 171 aprint_normal(": DesignWare SD/MMC\n"); 172 173 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 174 aprint_error_dev(self, "failed to decode interrupt\n"); 175 return; 176 } 177 178 if (dwc_mmc_init(sc) != 0) 179 return; 180 181 sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_BIO, 0, 182 dwc_mmc_intr, sc); 183 if (sc->sc_ih == NULL) { 184 aprint_error_dev(self, "couldn't establish interrupt on %s\n", 185 intrstr); 186 return; 187 } 188 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 189 } 190 191 static void 192 dwcmmc_fdt_pre_power_on(struct dwc_mmc_softc *sc) 193 { 194 struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); 195 196 if (esc->sc_pwrseq != NULL) 197 fdtbus_mmc_pwrseq_pre_power_on(esc->sc_pwrseq); 198 } 199 200 static void 201 dwcmmc_fdt_post_power_on(struct dwc_mmc_softc *sc) 202 { 203 struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); 204 205 if (esc->sc_pwrseq != NULL) 206 fdtbus_mmc_pwrseq_post_power_on(esc->sc_pwrseq); 207 } 208 209 static int 210 dwcmmc_fdt_card_detect(struct dwc_mmc_softc *sc) 211 { 212 struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); 213 214 KASSERT(esc->sc_pin_cd != NULL); 215 216 return fdtbus_gpio_read(esc->sc_pin_cd); 217 } 218 219 static int 220 dwcmmc_fdt_bus_clock(struct dwc_mmc_softc *sc, int rate) 221 { 222 struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); 223 const u_int ciu_div = esc->sc_conf->ciu_div > 0 ? esc->sc_conf->ciu_div : 1; 224 int error; 225 226 error = clk_set_rate(esc->sc_clk_ciu, 1000 * rate * ciu_div); 227 if (error != 0) { 228 aprint_error_dev(sc->sc_dev, "failed to set rate to %u kHz: %d\n", 229 rate * ciu_div, error); 230 return error; 231 } 232 233 sc->sc_clock_freq = clk_get_rate(esc->sc_clk_ciu); 234 235 aprint_debug_dev(sc->sc_dev, "set clock rate to %u kHz (target %u kHz)\n", 236 sc->sc_clock_freq, rate); 237 238 return 0; 239 } 240 241 static int 242 dwcmmc_fdt_signal_voltage(struct dwc_mmc_softc *sc, int signal_voltage) 243 { 244 struct dwcmmc_fdt_softc *esc = device_private(sc->sc_dev); 245 u_int uvol; 246 int error; 247 248 if (esc->sc_vqmmc == NULL) 249 return 0; 250 251 switch (signal_voltage) { 252 case SDMMC_SIGNAL_VOLTAGE_180: 253 uvol = 1800000; 254 break; 255 case SDMMC_SIGNAL_VOLTAGE_330: 256 uvol = 3300000; 257 break; 258 default: 259 return EINVAL; 260 } 261 262 error = fdtbus_regulator_supports_voltage(esc->sc_vqmmc, uvol, uvol); 263 if (error != 0) 264 return 0; 265 266 error = fdtbus_regulator_set_voltage(esc->sc_vqmmc, uvol, uvol); 267 if (error != 0) 268 return error; 269 270 return fdtbus_regulator_enable(esc->sc_vqmmc); 271 } 272
Indexes created Tue Sep 23 02:09:52 GMT 2025