arasan_sdhc_fdt.c revision 1.12
1 /* $NetBSD: arasan_sdhc_fdt.c,v 1.12 2022/11/01 00:57:39 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 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: arasan_sdhc_fdt.c,v 1.12 2022/11/01 00:57:39 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/systm.h> 36 #include <sys/sysctl.h> 37 #include <sys/kmem.h> 38 39 #include <dev/sdmmc/sdhcreg.h> 40 #include <dev/sdmmc/sdhcvar.h> 41 #include <dev/sdmmc/sdmmcvar.h> 42 43 #include <dev/clk/clk_backend.h> 44 45 #include <dev/fdt/fdtvar.h> 46 #include <dev/fdt/syscon.h> 47 48 #define RK3399_GRF_EMMCCORE_CON0 0xf000 49 #define RK3399_CORECFG_BASECLKFREQ __BITS(15,8) 50 #define RK3399_CORECFG_TIMEOUTCLKUNIT __BIT(7) 51 #define RK3399_CORECFG_TUNINGCOUNT __BITS(5,0) 52 #define RK3399_GRF_EMMCCORE_CON11 0xf02c 53 #define RK3399_CORECFG_CLOCKMULTIPLIER __BITS(7,0) 54 55 enum arasan_sdhc_type { 56 AS_TYPE_RK3399 = 1, 57 AS_TYPE_SDHCI_8_9A, 58 }; 59 60 struct arasan_sdhc_softc { 61 struct sdhc_softc sc_base; 62 struct sdhc_host *sc_host[1]; 63 bus_space_tag_t sc_bst; 64 bus_space_handle_t sc_bsh; 65 bus_size_t sc_bsz; 66 int sc_phandle; 67 struct fdtbus_phy *sc_phy; 68 struct syscon *sc_syscon; 69 struct clk *sc_clk_xin; 70 struct clk *sc_clk_ahb; 71 enum arasan_sdhc_type sc_type; 72 struct clk_domain sc_clkdom; 73 struct clk sc_clk_card; 74 }; 75 76 static const struct device_compatible_entry compat_data[] = { 77 { .compat = "rockchip,rk3399-sdhci-5.1", 78 .value = AS_TYPE_RK3399 }, 79 80 { .compat = "arasan,sdhci-8.9a", 81 .value = AS_TYPE_SDHCI_8_9A }, 82 83 DEVICE_COMPAT_EOL 84 }; 85 86 static const struct device_compatible_entry sdhci_5_1_compat[] = { 87 { .compat = "arasan,sdhci-5.1" }, 88 DEVICE_COMPAT_EOL 89 }; 90 91 static struct clk * 92 arasan_sdhc_clk_decode(device_t dev, int cc_phandle, const void *data, size_t len) 93 { 94 struct arasan_sdhc_softc * const sc = device_private(dev); 95 96 if (len != 0) 97 return NULL; 98 99 return &sc->sc_clk_card; 100 } 101 102 static const struct fdtbus_clock_controller_func arasan_sdhc_fdt_clk_funcs = { 103 .decode = arasan_sdhc_clk_decode, 104 }; 105 106 static struct clk * 107 arasan_sdhc_clk_get(void *priv, const char *name) 108 { 109 struct arasan_sdhc_softc * const sc = priv; 110 111 if (strcmp(name, sc->sc_clk_card.name) != 0) 112 return NULL; 113 114 return &sc->sc_clk_card; 115 } 116 117 static u_int 118 arasan_sdhc_clk_get_rate(void *priv, struct clk *clk) 119 { 120 struct arasan_sdhc_softc * const sc = priv; 121 122 return clk_get_rate(sc->sc_clk_xin); 123 } 124 125 static const struct clk_funcs arasan_sdhc_clk_funcs = { 126 .get = arasan_sdhc_clk_get, 127 .get_rate = arasan_sdhc_clk_get_rate, 128 }; 129 130 static int 131 arasan_sdhc_signal_voltage(struct sdhc_softc *sdhc, int signal_voltage) 132 { 133 if (signal_voltage == SDMMC_SIGNAL_VOLTAGE_180) 134 return 0; 135 136 return EINVAL; 137 } 138 139 static int 140 arasan_sdhc_bus_clock_pre(struct sdhc_softc *sdhc, int freq) 141 { 142 struct arasan_sdhc_softc * const sc = device_private(sdhc->sc_dev); 143 int error; 144 145 if (sc->sc_phy != NULL) { 146 error = fdtbus_phy_enable(sc->sc_phy, false); 147 if (error != 0) 148 return error; 149 } 150 151 return 0; 152 } 153 154 static int 155 arasan_sdhc_bus_clock_post(struct sdhc_softc *sdhc, int freq) 156 { 157 struct arasan_sdhc_softc * const sc = device_private(sdhc->sc_dev); 158 int error; 159 160 if (sc->sc_phy != NULL) { 161 error = fdtbus_phy_enable(sc->sc_phy, true); 162 if (error != 0) 163 return error; 164 } 165 166 return 0; 167 } 168 169 static void 170 arasan_sdhc_init_rk3399(struct arasan_sdhc_softc *sc) 171 { 172 uint32_t mask, val; 173 174 if (sc->sc_syscon == NULL) 175 return; 176 177 syscon_lock(sc->sc_syscon); 178 179 /* Disable clock multiplier */ 180 mask = RK3399_CORECFG_CLOCKMULTIPLIER; 181 val = 0; 182 syscon_write_4(sc->sc_syscon, RK3399_GRF_EMMCCORE_CON11, (mask << 16) | val); 183 184 /* Set base clock frequency */ 185 const u_int xin_rate = clk_get_rate(sc->sc_clk_xin); 186 mask = RK3399_CORECFG_BASECLKFREQ; 187 val = __SHIFTIN((xin_rate + (1000000 / 2)) / 1000000, RK3399_CORECFG_BASECLKFREQ); 188 syscon_write_4(sc->sc_syscon, RK3399_GRF_EMMCCORE_CON0, (mask << 16) | val); 189 190 syscon_unlock(sc->sc_syscon); 191 } 192 193 static void 194 arasan_sdhc_init(device_t dev) 195 { 196 struct arasan_sdhc_softc * const sc = device_private(dev); 197 int error; 198 199 if (sc->sc_type == AS_TYPE_RK3399) 200 arasan_sdhc_init_rk3399(sc); 201 202 if (of_compatible_match(sc->sc_phandle, sdhci_5_1_compat)) { 203 sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "phy_arasan"); 204 if (sc->sc_phy == NULL) { 205 aprint_error_dev(dev, "couldn't get PHY\n"); 206 return; 207 } 208 sc->sc_base.sc_vendor_signal_voltage = arasan_sdhc_signal_voltage; 209 } 210 211 error = sdhc_host_found(&sc->sc_base, sc->sc_bst, sc->sc_bsh, sc->sc_bsz); 212 if (error != 0) { 213 aprint_error_dev(dev, "couldn't initialize host, error = %d\n", error); 214 return; 215 } 216 } 217 218 static int 219 arasan_sdhc_match(device_t parent, cfdata_t cf, void *aux) 220 { 221 struct fdt_attach_args * const faa = aux; 222 223 return of_compatible_match(faa->faa_phandle, compat_data); 224 } 225 226 static void 227 arasan_sdhc_attach(device_t parent, device_t self, void *aux) 228 { 229 struct arasan_sdhc_softc * const sc = device_private(self); 230 struct fdt_attach_args * const faa = aux; 231 const int phandle = faa->faa_phandle; 232 char intrstr[128]; 233 const char *clkname; 234 bus_addr_t addr; 235 bus_size_t size; 236 u_int bus_width; 237 void *ih; 238 239 fdtbus_clock_assign(phandle); 240 241 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 242 aprint_error(": couldn't get registers\n"); 243 return; 244 } 245 246 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 247 aprint_error(": couldn't decode interrupt\n"); 248 return; 249 } 250 251 sc->sc_clk_xin = fdtbus_clock_get(phandle, "clk_xin"); 252 sc->sc_clk_ahb = fdtbus_clock_get(phandle, "clk_ahb"); 253 if (sc->sc_clk_xin == NULL || sc->sc_clk_ahb == NULL) { 254 aprint_error(": couldn't get clocks\n"); 255 return; 256 } 257 if (clk_enable(sc->sc_clk_xin) != 0 || clk_enable(sc->sc_clk_ahb) != 0) { 258 aprint_error(": couldn't enable clocks\n"); 259 return; 260 } 261 262 sc->sc_syscon = fdtbus_syscon_acquire(phandle, "arasan,soc-ctl-syscon"); 263 264 if (of_getprop_uint32(phandle, "bus-width", &bus_width) != 0) 265 bus_width = 4; 266 267 sc->sc_phandle = phandle; 268 sc->sc_bst = faa->faa_bst; 269 if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { 270 aprint_error(": couldn't map registers\n"); 271 return; 272 } 273 sc->sc_bsz = size; 274 sc->sc_type = of_compatible_lookup(phandle, compat_data)->value; 275 276 #ifdef _LP64 277 const uint32_t caps = bus_space_read_4(sc->sc_bst, sc->sc_bsh, SDHC_CAPABILITIES); 278 if ((caps & (SDHC_ADMA2_SUPP|SDHC_64BIT_SYS_BUS)) == SDHC_ADMA2_SUPP) { 279 int error = bus_dmatag_subregion(faa->faa_dmat, 0, __MASK(32), 280 &sc->sc_base.sc_dmat, BUS_DMA_WAITOK); 281 if (error != 0) { 282 aprint_error(": couldn't create DMA tag: %d\n", error); 283 return; 284 } 285 } else { 286 sc->sc_base.sc_dmat = faa->faa_dmat; 287 } 288 #else 289 sc->sc_base.sc_dmat = faa->faa_dmat; 290 #endif 291 292 sc->sc_base.sc_dev = self; 293 sc->sc_base.sc_host = sc->sc_host; 294 sc->sc_base.sc_flags = SDHC_FLAG_NO_CLKBASE | 295 SDHC_FLAG_SINGLE_POWER_WRITE | 296 SDHC_FLAG_32BIT_ACCESS | 297 SDHC_FLAG_USE_DMA | 298 SDHC_FLAG_STOP_WITH_TC; 299 if (sc->sc_type == AS_TYPE_SDHCI_8_9A) { 300 /* 301 * Workaround for sporadic transfer errors on the Arasan SDHCI 302 * found in the Xilinx Zynq-7000 SoC. 303 */ 304 sc->sc_base.sc_flags |= SDHC_FLAG_BROKEN_ADMA; 305 } 306 if (bus_width == 8) { 307 sc->sc_base.sc_flags |= SDHC_FLAG_8BIT_MODE; 308 } 309 sc->sc_base.sc_clkbase = clk_get_rate(sc->sc_clk_xin) / 1000; 310 sc->sc_base.sc_vendor_bus_clock = arasan_sdhc_bus_clock_pre; 311 sc->sc_base.sc_vendor_bus_clock_post = arasan_sdhc_bus_clock_post; 312 313 aprint_naive("\n"); 314 aprint_normal(": Arasan SDHCI controller\n"); 315 316 clkname = fdtbus_get_string(phandle, "clock-output-names"); 317 if (clkname == NULL) 318 clkname = faa->faa_name; 319 320 sc->sc_clkdom.name = device_xname(self); 321 sc->sc_clkdom.funcs = &arasan_sdhc_clk_funcs; 322 sc->sc_clkdom.priv = sc; 323 sc->sc_clk_card.domain = &sc->sc_clkdom; 324 sc->sc_clk_card.name = kmem_asprintf("%s", clkname); 325 clk_attach(&sc->sc_clk_card); 326 327 fdtbus_register_clock_controller(self, phandle, &arasan_sdhc_fdt_clk_funcs); 328 329 ih = fdtbus_intr_establish_xname(phandle, 0, IPL_SDMMC, 0, 330 sdhc_intr, &sc->sc_base, device_xname(self)); 331 if (ih == NULL) { 332 aprint_error_dev(self, "couldn't establish interrupt on %s\n", intrstr); 333 return; 334 } 335 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 336 337 arasan_sdhc_init(self); 338 } 339 340 CFATTACH_DECL_NEW(arasan_sdhc_fdt, sizeof(struct arasan_sdhc_softc), 341 arasan_sdhc_match, arasan_sdhc_attach, NULL, NULL); 342
Indexes created Fri Oct 03 17:10:05 GMT 2025