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 am335x_prcm_reset(void); 77 78 #define TI_AM3_PRCM 18 79 #define TI_AM4_PRCM 17 80 #define TI_OMAP2_PRCM 16 81 #define TI_OMAP3_PRM 15 82 #define TI_OMAP3_CM 14 83 #define TI_OMAP4_CM1 13 84 #define TI_OMAP4_PRM 12 85 #define TI_OMAP4_CM2 11 86 #define TI_OMAP4_SCRM 10 87 #define TI_OMAP5_PRM 9 88 #define TI_OMAP5_CM_CORE_AON 8 89 #define TI_OMAP5_SCRM 7 90 #define TI_OMAP5_CM_CORE 6 91 #define TI_DRA7_PRM 5 92 #define TI_DRA7_CM_CORE_AON 4 93 #define TI_DRA7_CM_CORE 3 94 #define TI_DM814_PRCM 2 95 #define TI_DM816_PRCM 1 96 #define TI_PRCM_END 0 97 98 static struct ofw_compat_data compat_data[] = { 99 { "ti,am3-prcm", TI_AM3_PRCM }, 100 { "ti,am4-prcm", TI_AM4_PRCM }, 101 { "ti,omap2-prcm", TI_OMAP2_PRCM }, 102 { "ti,omap3-prm", TI_OMAP3_PRM }, 103 { "ti,omap3-cm", TI_OMAP3_CM }, 104 { "ti,omap4-cm1", TI_OMAP4_CM1 }, 105 { "ti,omap4-prm", TI_OMAP4_PRM }, 106 { "ti,omap4-cm2", TI_OMAP4_CM2 }, 107 { "ti,omap4-scrm", TI_OMAP4_SCRM }, 108 { "ti,omap5-prm", TI_OMAP5_PRM }, 109 { "ti,omap5-cm-core-aon", TI_OMAP5_CM_CORE_AON }, 110 { "ti,omap5-scrm", TI_OMAP5_SCRM }, 111 { "ti,omap5-cm-core", TI_OMAP5_CM_CORE }, 112 { "ti,dra7-prm", TI_DRA7_PRM }, 113 { "ti,dra7-cm-core-aon", TI_DRA7_CM_CORE_AON }, 114 { "ti,dra7-cm-core", TI_DRA7_CM_CORE }, 115 { "ti,dm814-prcm", TI_DM814_PRCM }, 116 { "ti,dm816-prcm", TI_DM816_PRCM }, 117 { NULL, TI_PRCM_END} 118 }; 119 120 static int 121 ti_prcm_probe(device_t dev) 122 { 123 if (!ofw_bus_status_okay(dev)) 124 return (ENXIO); 125 126 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) { 127 return (ENXIO); 128 } 129 130 device_set_desc(dev, "TI Power and Clock Management"); 131 return(BUS_PROBE_DEFAULT); 132 } 133 134 static int 135 ti_prcm_attach(device_t dev) 136 { 137 struct ti_prcm_softc *sc; 138 phandle_t node, child; 139 int rid; 140 141 sc = device_get_softc(dev); 142 sc->dev = dev; 143 144 node = ofw_bus_get_node(sc->dev); 145 simplebus_init(sc->dev, node); 146 147 if (simplebus_fill_ranges(node, &sc->sc_simplebus) < 0) { 148 device_printf(sc->dev, "could not get ranges\n"); 149 return (ENXIO); 150 } 151 if (sc->sc_simplebus.nranges == 0) { 152 device_printf(sc->dev, "nranges == 0\n"); 153 return (ENXIO); 154 } 155 156 sc->mem_res = bus_alloc_resource(sc->dev, SYS_RES_MEMORY, &rid, 157 sc->sc_simplebus.ranges[0].host, 158 (sc->sc_simplebus.ranges[0].host + 159 sc->sc_simplebus.ranges[0].size - 1), 160 sc->sc_simplebus.ranges[0].size, 161 RF_ACTIVE | RF_SHAREABLE); 162 163 if (sc->mem_res == NULL) { 164 return (ENXIO); 165 } 166 167 sc->bst = rman_get_bustag(sc->mem_res); 168 sc->bsh = rman_get_bushandle(sc->mem_res); 169 170 mtx_init(&sc->mtx, device_get_nameunit(dev), NULL, MTX_DEF); 171 172 /* Fixme: for xxx_prcm_reset functions. 173 * Get rid of global variables? 174 */ 175 ti_prcm_sc = sc; 176 177 switch(ti_chip()) { 178 #ifdef SOC_TI_AM335X 179 case CHIP_AM335X: 180 ti_cpu_reset = am335x_prcm_reset; 181 break; 182 #endif 183 } 184 185 bus_identify_children(sc->dev); 186 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 187 simplebus_add_device(dev, child, 0, NULL, -1, NULL); 188 } 189 bus_attach_children(sc->dev); 190 return (0); 191 } 192 193 int 194 ti_prcm_write_4(device_t dev, bus_addr_t addr, uint32_t val) 195 { 196 struct ti_prcm_softc *sc; 197 198 sc = device_get_softc(dev); 199 DPRINTF(sc->dev, "offset=%lx write %x\n", addr, val); 200 bus_space_write_4(sc->bst, sc->bsh, addr, val); 201 return (0); 202 } 203 int 204 ti_prcm_read_4(device_t dev, bus_addr_t addr, uint32_t *val) 205 { 206 struct ti_prcm_softc *sc; 207 208 sc = device_get_softc(dev); 209 210 *val = bus_space_read_4(sc->bst, sc->bsh, addr); 211 DPRINTF(sc->dev, "offset=%lx Read %x\n", addr, *val); 212 return (0); 213 } 214 215 int 216 ti_prcm_modify_4(device_t dev, bus_addr_t addr, uint32_t clr, uint32_t set) 217 { 218 struct ti_prcm_softc *sc; 219 uint32_t reg; 220 221 sc = device_get_softc(dev); 222 223 reg = bus_space_read_4(sc->bst, sc->bsh, addr); 224 reg &= ~clr; 225 reg |= set; 226 bus_space_write_4(sc->bst, sc->bsh, addr, reg); 227 DPRINTF(sc->dev, "offset=%lx reg: %x (clr %x set %x)\n", addr, reg, clr, set); 228 229 return (0); 230 } 231 232 void 233 ti_prcm_device_lock(device_t dev) 234 { 235 struct ti_prcm_softc *sc; 236 237 sc = device_get_softc(dev); 238 mtx_lock(&sc->mtx); 239 } 240 241 void 242 ti_prcm_device_unlock(device_t dev) 243 { 244 struct ti_prcm_softc *sc; 245 246 sc = device_get_softc(dev); 247 mtx_unlock(&sc->mtx); 248 } 249 250 static device_method_t ti_prcm_methods[] = { 251 DEVMETHOD(device_probe, ti_prcm_probe), 252 DEVMETHOD(device_attach, ti_prcm_attach), 253 254 /* clkdev interface */ 255 DEVMETHOD(clkdev_write_4, ti_prcm_write_4), 256 DEVMETHOD(clkdev_read_4, ti_prcm_read_4), 257 DEVMETHOD(clkdev_modify_4, ti_prcm_modify_4), 258 DEVMETHOD(clkdev_device_lock, ti_prcm_device_lock), 259 DEVMETHOD(clkdev_device_unlock, ti_prcm_device_unlock), 260 261 DEVMETHOD_END 262 }; 263 264 DEFINE_CLASS_1(ti_prcm, ti_prcm_driver, ti_prcm_methods, 265 sizeof(struct ti_prcm_softc), simplebus_driver); 266 267 EARLY_DRIVER_MODULE(ti_prcm, ofwbus, ti_prcm_driver, 0, 0, BUS_PASS_BUS); 268 EARLY_DRIVER_MODULE(ti_prcm, simplebus, ti_prcm_driver, 0, 0, 269 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 270 MODULE_VERSION(ti_prcm, 1); 271 MODULE_DEPEND(ti_prcm, ti_scm, 1, 1, 1); 272 273 /* From sys/arm/ti/am335x/am335x_prcm.c 274 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org> 275 */ 276 #define PRM_DEVICE_OFFSET 0xF00 277 #define AM335x_PRM_RSTCTRL (PRM_DEVICE_OFFSET + 0x00) 278 279 static void 280 am335x_prcm_reset(void) 281 { 282 ti_prcm_write_4(ti_prcm_sc->dev, AM335x_PRM_RSTCTRL, (1<<1)); 283 } 284