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