1 /*- 2 * Copyright (c) 2012 Thomas Skibo 3 * Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 /* Generic driver to attach sdhci controllers on simplebus. 28 * Derived mainly from sdhci_pci.c 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/conf.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/module.h> 41 #include <sys/mutex.h> 42 #include <sys/resource.h> 43 #include <sys/rman.h> 44 #include <sys/sysctl.h> 45 #include <sys/taskqueue.h> 46 47 #include <machine/bus.h> 48 #include <machine/resource.h> 49 #include <machine/stdarg.h> 50 51 #include <dev/fdt/fdt_common.h> 52 #include <dev/ofw/ofw_bus.h> 53 #include <dev/ofw/ofw_bus_subr.h> 54 55 #include <dev/mmc/bridge.h> 56 #include <dev/mmc/mmcreg.h> 57 #include <dev/mmc/mmcbrvar.h> 58 #include <dev/sdhci/sdhci.h> 59 60 #include "mmcbr_if.h" 61 #include "sdhci_if.h" 62 63 #define MAX_SLOTS 6 64 65 struct sdhci_fdt_softc { 66 device_t dev; /* Controller device */ 67 u_int quirks; /* Chip specific quirks */ 68 u_int caps; /* If we override SDHCI_CAPABILITIES */ 69 uint32_t max_clk; /* Max possible freq */ 70 struct resource *irq_res; /* IRQ resource */ 71 void *intrhand; /* Interrupt handle */ 72 73 int num_slots; /* Number of slots on this controller*/ 74 struct sdhci_slot slots[MAX_SLOTS]; 75 struct resource *mem_res[MAX_SLOTS]; /* Memory resource */ 76 }; 77 78 static uint8_t 79 sdhci_fdt_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off) 80 { 81 struct sdhci_fdt_softc *sc = device_get_softc(dev); 82 return (bus_read_1(sc->mem_res[slot->num], off)); 83 } 84 85 static void 86 sdhci_fdt_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off, 87 uint8_t val) 88 { 89 struct sdhci_fdt_softc *sc = device_get_softc(dev); 90 bus_write_1(sc->mem_res[slot->num], off, val); 91 } 92 93 static uint16_t 94 sdhci_fdt_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off) 95 { 96 struct sdhci_fdt_softc *sc = device_get_softc(dev); 97 return (bus_read_2(sc->mem_res[slot->num], off)); 98 } 99 100 static void 101 sdhci_fdt_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off, 102 uint16_t val) 103 { 104 struct sdhci_fdt_softc *sc = device_get_softc(dev); 105 bus_write_2(sc->mem_res[slot->num], off, val); 106 } 107 108 static uint32_t 109 sdhci_fdt_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off) 110 { 111 struct sdhci_fdt_softc *sc = device_get_softc(dev); 112 return (bus_read_4(sc->mem_res[slot->num], off)); 113 } 114 115 static void 116 sdhci_fdt_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, 117 uint32_t val) 118 { 119 struct sdhci_fdt_softc *sc = device_get_softc(dev); 120 bus_write_4(sc->mem_res[slot->num], off, val); 121 } 122 123 static void 124 sdhci_fdt_read_multi_4(device_t dev, struct sdhci_slot *slot, 125 bus_size_t off, uint32_t *data, bus_size_t count) 126 { 127 struct sdhci_fdt_softc *sc = device_get_softc(dev); 128 bus_read_multi_4(sc->mem_res[slot->num], off, data, count); 129 } 130 131 static void 132 sdhci_fdt_write_multi_4(device_t dev, struct sdhci_slot *slot, 133 bus_size_t off, uint32_t *data, bus_size_t count) 134 { 135 struct sdhci_fdt_softc *sc = device_get_softc(dev); 136 bus_write_multi_4(sc->mem_res[slot->num], off, data, count); 137 } 138 139 static void 140 sdhci_fdt_intr(void *arg) 141 { 142 struct sdhci_fdt_softc *sc = (struct sdhci_fdt_softc *)arg; 143 int i; 144 145 for (i = 0; i < sc->num_slots; i++) { 146 struct sdhci_slot *slot = &sc->slots[i]; 147 sdhci_generic_intr(slot); 148 } 149 } 150 151 static int 152 sdhci_fdt_probe(device_t dev) 153 { 154 struct sdhci_fdt_softc *sc = device_get_softc(dev); 155 phandle_t node; 156 pcell_t cid; 157 158 sc->quirks = 0; 159 sc->num_slots = 1; 160 sc->max_clk = 0; 161 162 if (!ofw_bus_status_okay(dev)) 163 return (ENXIO); 164 165 if (ofw_bus_is_compatible(dev, "sdhci_generic")) { 166 device_set_desc(dev, "generic fdt SDHCI controller"); 167 } else if (ofw_bus_is_compatible(dev, "xlnx,zy7_sdhci")) { 168 sc->quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; 169 device_set_desc(dev, "Zynq-7000 generic fdt SDHCI controller"); 170 } else 171 return (ENXIO); 172 173 node = ofw_bus_get_node(dev); 174 175 /* Allow dts to patch quirks, slots, and max-frequency. */ 176 if ((OF_getencprop(node, "quirks", &cid, sizeof(cid))) > 0) 177 sc->quirks = cid; 178 if ((OF_getencprop(node, "num-slots", &cid, sizeof(cid))) > 0) 179 sc->num_slots = cid; 180 if ((OF_getencprop(node, "max-frequency", &cid, sizeof(cid))) > 0) 181 sc->max_clk = cid; 182 183 184 return (0); 185 } 186 187 static int 188 sdhci_fdt_attach(device_t dev) 189 { 190 struct sdhci_fdt_softc *sc = device_get_softc(dev); 191 int err, slots, rid, i; 192 193 sc->dev = dev; 194 195 /* Allocate IRQ. */ 196 rid = 0; 197 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 198 RF_ACTIVE); 199 if (sc->irq_res == NULL) { 200 device_printf(dev, "Can't allocate IRQ\n"); 201 return (ENOMEM); 202 } 203 204 /* Scan all slots. */ 205 slots = sc->num_slots; /* number of slots determined in probe(). */ 206 sc->num_slots = 0; 207 for (i = 0; i < slots; i++) { 208 struct sdhci_slot *slot = &sc->slots[sc->num_slots]; 209 210 /* Allocate memory. */ 211 rid = 0; 212 sc->mem_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 213 &rid, RF_ACTIVE); 214 if (sc->mem_res[i] == NULL) { 215 device_printf(dev, "Can't allocate memory for " 216 "slot %d\n", i); 217 continue; 218 } 219 220 slot->quirks = sc->quirks; 221 slot->caps = sc->caps; 222 slot->max_clk = sc->max_clk; 223 224 if (sdhci_init_slot(dev, slot, i) != 0) 225 continue; 226 227 sc->num_slots++; 228 } 229 device_printf(dev, "%d slot(s) allocated\n", sc->num_slots); 230 231 /* Activate the interrupt */ 232 err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 233 NULL, sdhci_fdt_intr, sc, &sc->intrhand); 234 if (err) { 235 device_printf(dev, "Cannot setup IRQ\n"); 236 return (err); 237 } 238 239 /* Process cards detection. */ 240 for (i = 0; i < sc->num_slots; i++) { 241 struct sdhci_slot *slot = &sc->slots[i]; 242 sdhci_start_slot(slot); 243 } 244 245 return (0); 246 } 247 248 static int 249 sdhci_fdt_detach(device_t dev) 250 { 251 struct sdhci_fdt_softc *sc = device_get_softc(dev); 252 int i; 253 254 bus_generic_detach(dev); 255 bus_teardown_intr(dev, sc->irq_res, sc->intrhand); 256 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res), 257 sc->irq_res); 258 259 for (i = 0; i < sc->num_slots; i++) { 260 struct sdhci_slot *slot = &sc->slots[i]; 261 262 sdhci_cleanup_slot(slot); 263 bus_release_resource(dev, SYS_RES_MEMORY, 264 rman_get_rid(sc->mem_res[i]), 265 sc->mem_res[i]); 266 } 267 268 return (0); 269 } 270 271 static device_method_t sdhci_fdt_methods[] = { 272 /* device_if */ 273 DEVMETHOD(device_probe, sdhci_fdt_probe), 274 DEVMETHOD(device_attach, sdhci_fdt_attach), 275 DEVMETHOD(device_detach, sdhci_fdt_detach), 276 277 /* Bus interface */ 278 DEVMETHOD(bus_read_ivar, sdhci_generic_read_ivar), 279 DEVMETHOD(bus_write_ivar, sdhci_generic_write_ivar), 280 281 /* mmcbr_if */ 282 DEVMETHOD(mmcbr_update_ios, sdhci_generic_update_ios), 283 DEVMETHOD(mmcbr_request, sdhci_generic_request), 284 DEVMETHOD(mmcbr_get_ro, sdhci_generic_get_ro), 285 DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host), 286 DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host), 287 288 /* SDHCI registers accessors */ 289 DEVMETHOD(sdhci_read_1, sdhci_fdt_read_1), 290 DEVMETHOD(sdhci_read_2, sdhci_fdt_read_2), 291 DEVMETHOD(sdhci_read_4, sdhci_fdt_read_4), 292 DEVMETHOD(sdhci_read_multi_4, sdhci_fdt_read_multi_4), 293 DEVMETHOD(sdhci_write_1, sdhci_fdt_write_1), 294 DEVMETHOD(sdhci_write_2, sdhci_fdt_write_2), 295 DEVMETHOD(sdhci_write_4, sdhci_fdt_write_4), 296 DEVMETHOD(sdhci_write_multi_4, sdhci_fdt_write_multi_4), 297 298 DEVMETHOD_END 299 }; 300 301 static driver_t sdhci_fdt_driver = { 302 "sdhci_fdt", 303 sdhci_fdt_methods, 304 sizeof(struct sdhci_fdt_softc), 305 }; 306 static devclass_t sdhci_fdt_devclass; 307 308 DRIVER_MODULE(sdhci_fdt, simplebus, sdhci_fdt_driver, sdhci_fdt_devclass, 0,0); 309 MODULE_DEPEND(sdhci_fdt, sdhci, 1, 1, 1); 310