1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org> 5 * All rights reserved. 6 * 7 * Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* Based on sys/arm/ti/am335x/am335x_prcm.c */ 32 33 #include <sys/cdefs.h> 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/malloc.h> 40 #include <sys/rman.h> 41 #include <sys/timeet.h> 42 #include <sys/timetc.h> 43 #include <sys/watchdog.h> 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 #include <machine/intr.h> 47 48 #include <arm/ti/ti_cpuid.h> 49 #include <arm/ti/ti_prcm.h> 50 #include <arm/ti/tivar.h> 51 52 #include <dev/fdt/simplebus.h> 53 54 #include <dev/ofw/openfirm.h> 55 #include <dev/ofw/ofw_bus.h> 56 #include <dev/ofw/ofw_bus_subr.h> 57 58 #include "clkdev_if.h" 59 60 #if 0 61 #define DPRINTF(dev, msg...) device_printf(dev, msg) 62 #else 63 #define DPRINTF(dev, msg...) 64 #endif 65 66 struct ti_prcm_softc { 67 struct simplebus_softc sc_simplebus; 68 device_t dev; 69 struct resource * mem_res; 70 bus_space_tag_t bst; 71 bus_space_handle_t bsh; 72 int attach_done; 73 struct mtx mtx; 74 }; 75 76 static struct ti_prcm_softc *ti_prcm_sc = NULL; 77 static void omap4_prcm_reset(void); 78 static void am335x_prcm_reset(void); 79 80 #define TI_AM3_PRCM 18 81 #define TI_AM4_PRCM 17 82 #define TI_OMAP2_PRCM 16 83 #define TI_OMAP3_PRM 15 84 #define TI_OMAP3_CM 14 85 #define TI_OMAP4_CM1 13 86 #define TI_OMAP4_PRM 12 87 #define TI_OMAP4_CM2 11 88 #define TI_OMAP4_SCRM 10 89 #define TI_OMAP5_PRM 9 90 #define TI_OMAP5_CM_CORE_AON 8 91 #define TI_OMAP5_SCRM 7 92 #define TI_OMAP5_CM_CORE 6 93 #define TI_DRA7_PRM 5 94 #define TI_DRA7_CM_CORE_AON 4 95 #define TI_DRA7_CM_CORE 3 96 #define TI_DM814_PRCM 2 97 #define TI_DM816_PRCM 1 98 #define TI_PRCM_END 0 99 100 static struct ofw_compat_data compat_data[] = { 101 { "ti,am3-prcm", TI_AM3_PRCM }, 102 { "ti,am4-prcm", TI_AM4_PRCM }, 103 { "ti,omap2-prcm", TI_OMAP2_PRCM }, 104 { "ti,omap3-prm", TI_OMAP3_PRM }, 105 { "ti,omap3-cm", TI_OMAP3_CM }, 106 { "ti,omap4-cm1", TI_OMAP4_CM1 }, 107 { "ti,omap4-prm", TI_OMAP4_PRM }, 108 { "ti,omap4-cm2", TI_OMAP4_CM2 }, 109 { "ti,omap4-scrm", TI_OMAP4_SCRM }, 110 { "ti,omap5-prm", TI_OMAP5_PRM }, 111 { "ti,omap5-cm-core-aon", TI_OMAP5_CM_CORE_AON }, 112 { "ti,omap5-scrm", TI_OMAP5_SCRM }, 113 { "ti,omap5-cm-core", TI_OMAP5_CM_CORE }, 114 { "ti,dra7-prm", TI_DRA7_PRM }, 115 { "ti,dra7-cm-core-aon", TI_DRA7_CM_CORE_AON }, 116 { "ti,dra7-cm-core", TI_DRA7_CM_CORE }, 117 { "ti,dm814-prcm", TI_DM814_PRCM }, 118 { "ti,dm816-prcm", TI_DM816_PRCM }, 119 { NULL, TI_PRCM_END} 120 }; 121 122 static int 123 ti_prcm_probe(device_t dev) 124 { 125 if (!ofw_bus_status_okay(dev)) 126 return (ENXIO); 127 128 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) { 129 return (ENXIO); 130 } 131 132 device_set_desc(dev, "TI Power and Clock Management"); 133 return(BUS_PROBE_DEFAULT); 134 } 135 136 static int 137 ti_prcm_attach(device_t dev) 138 { 139 struct ti_prcm_softc *sc; 140 phandle_t node, child; 141 int rid; 142 143 sc = device_get_softc(dev); 144 sc->dev = dev; 145 146 node = ofw_bus_get_node(sc->dev); 147 simplebus_init(sc->dev, node); 148 149 if (simplebus_fill_ranges(node, &sc->sc_simplebus) < 0) { 150 device_printf(sc->dev, "could not get ranges\n"); 151 return (ENXIO); 152 } 153 if (sc->sc_simplebus.nranges == 0) { 154 device_printf(sc->dev, "nranges == 0\n"); 155 return (ENXIO); 156 } 157 158 sc->mem_res = bus_alloc_resource(sc->dev, SYS_RES_MEMORY, &rid, 159 sc->sc_simplebus.ranges[0].host, 160 (sc->sc_simplebus.ranges[0].host + 161 sc->sc_simplebus.ranges[0].size - 1), 162 sc->sc_simplebus.ranges[0].size, 163 RF_ACTIVE | RF_SHAREABLE); 164 165 if (sc->mem_res == NULL) { 166 return (ENXIO); 167 } 168 169 sc->bst = rman_get_bustag(sc->mem_res); 170 sc->bsh = rman_get_bushandle(sc->mem_res); 171 172 mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF); 173 174 /* Fixme: for xxx_prcm_reset functions. 175 * Get rid of global variables? 176 */ 177 ti_prcm_sc = sc; 178 179 switch(ti_chip()) { 180 #ifdef SOC_OMAP4 181 case CHIP_OMAP_4: 182 ti_cpu_reset = omap4_prcm_reset; 183 break; 184 #endif 185 #ifdef SOC_TI_AM335X 186 case CHIP_AM335X: 187 ti_cpu_reset = am335x_prcm_reset; 188 break; 189 #endif 190 } 191 192 bus_generic_probe(sc->dev); 193 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 194 simplebus_add_device(dev, child, 0, NULL, -1, NULL); 195 } 196 197 return (bus_generic_attach(sc->dev)); 198 } 199 200 int 201 ti_prcm_write_4(device_t dev, bus_addr_t addr, uint32_t val) 202 { 203 struct ti_prcm_softc *sc; 204 205 sc = device_get_softc(dev); 206 DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val); 207 bus_space_write_4(sc->bst, sc->bsh, addr, val); 208 return (0); 209 } 210 int 211 ti_prcm_read_4(device_t dev, bus_addr_t addr, uint32_t *val) 212 { 213 struct ti_prcm_softc *sc; 214 215 sc = device_get_softc(dev); 216 217 *val = bus_space_read_4(sc->bst, sc->bsh, addr); 218 DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, *val); 219 return (0); 220 } 221 222 int 223 ti_prcm_modify_4(device_t dev, bus_addr_t addr, uint32_t clr, uint32_t set) 224 { 225 struct ti_prcm_softc *sc; 226 uint32_t reg; 227 228 sc = device_get_softc(dev); 229 230 reg = bus_space_read_4(sc->bst, sc->bsh, addr); 231 reg &= ~clr; 232 reg |= set; 233 bus_space_write_4(sc->bst, sc->bsh, addr, reg); 234 DPRINTF(sc->dev, "offset=%lx reg: %x (clr %x set %x)\n", addr, reg, clr, set); 235 236 return (0); 237 } 238 239 void 240 ti_prcm_device_lock(device_t dev) 241 { 242 struct ti_prcm_softc *sc; 243 244 sc = device_get_softc(dev); 245 mtx_lock(&sc->mtx); 246 } 247 248 void 249 ti_prcm_device_unlock(device_t dev) 250 { 251 struct ti_prcm_softc *sc; 252 253 sc = device_get_softc(dev); 254 mtx_unlock(&sc->mtx); 255 } 256 257 static device_method_t ti_prcm_methods[] = { 258 DEVMETHOD(device_probe, ti_prcm_probe), 259 DEVMETHOD(device_attach, ti_prcm_attach), 260 261 /* clkdev interface */ 262 DEVMETHOD(clkdev_write_4, ti_prcm_write_4), 263 DEVMETHOD(clkdev_read_4, ti_prcm_read_4), 264 DEVMETHOD(clkdev_modify_4, ti_prcm_modify_4), 265 DEVMETHOD(clkdev_device_lock, ti_prcm_device_lock), 266 DEVMETHOD(clkdev_device_unlock, ti_prcm_device_unlock), 267 268 DEVMETHOD_END 269 }; 270 271 DEFINE_CLASS_1(ti_prcm, ti_prcm_driver, ti_prcm_methods, 272 sizeof(struct ti_prcm_softc), simplebus_driver); 273 274 EARLY_DRIVER_MODULE(ti_prcm, ofwbus, ti_prcm_driver, 0, 0, BUS_PASS_BUS); 275 EARLY_DRIVER_MODULE(ti_prcm, simplebus, ti_prcm_driver, 0, 0, 276 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 277 MODULE_VERSION(ti_prcm, 1); 278 MODULE_DEPEND(ti_prcm, ti_scm, 1, 1, 1); 279 280 /* From sys/arm/ti/am335x/am335x_prcm.c 281 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org> 282 */ 283 #define PRM_DEVICE_OFFSET 0xF00 284 #define AM335x_PRM_RSTCTRL (PRM_DEVICE_OFFSET + 0x00) 285 286 static void 287 am335x_prcm_reset(void) 288 { 289 ti_prcm_write_4(ti_prcm_sc->dev, AM335x_PRM_RSTCTRL, (1<<1)); 290 } 291 292 /* FIXME: Is this correct - or should the license part be ontop? */ 293 294 /* From sys/arm/ti/omap4/omap4_prcm_clks.c */ 295 /*- 296 * SPDX-License-Identifier: BSD-3-Clause 297 * 298 * Copyright (c) 2011 299 * Ben Gray <ben.r.gray@gmail.com>. 300 * All rights reserved. 301 * 302 * Redistribution and use in source and binary forms, with or without 303 * modification, are permitted provided that the following conditions 304 * are met: 305 * 1. Redistributions of source code must retain the above copyright 306 * notice, this list of conditions and the following disclaimer. 307 * 2. Redistributions in binary form must reproduce the above copyright 308 * notice, this list of conditions and the following disclaimer in the 309 * documentation and/or other materials provided with the distribution. 310 * 3. The name of the company nor the name of the author may be used to 311 * endorse or promote products derived from this software without specific 312 * prior written permission. 313 * 314 * THIS SOFTWARE IS PROVIDED BY BEN GRAY ``AS IS'' AND ANY EXPRESS OR 315 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 316 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 317 * IN NO EVENT SHALL BEN GRAY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 318 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 319 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 320 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 321 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 322 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 323 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 324 */ 325 #define PRM_RSTCTRL 0x1b00 326 #define PRM_RSTCTRL_RESET 0x2 327 328 static void 329 omap4_prcm_reset(void) 330 { 331 uint32_t reg; 332 333 ti_prcm_read_4(ti_prcm_sc->dev, PRM_RSTCTRL, ®); 334 reg = reg | PRM_RSTCTRL_RESET; 335 ti_prcm_write_4(ti_prcm_sc->dev, PRM_RSTCTRL, reg); 336 ti_prcm_read_4(ti_prcm_sc->dev, PRM_RSTCTRL, ®); 337 } 338