1 /* $NetBSD: opb.c,v 1.29 2021/08/07 16:19:03 thorpej Exp $ */ 2 3 /* 4 * Copyright 2001,2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by Christopher G. Demetriou 52 * for the NetBSD Project. 53 * 4. The name of the author may not be used to endorse or promote products 54 * derived from this software without specific prior written permission 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 58 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 60 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 61 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 65 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: opb.c,v 1.29 2021/08/07 16:19:03 thorpej Exp $"); 70 71 #include "locators.h" 72 73 #ifdef _KERNEL_OPT 74 #include "opt_emac.h" 75 #endif 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/device.h> 80 #include <sys/extent.h> 81 #include <sys/cpu.h> 82 83 #include <powerpc/ibm4xx/cpu.h> 84 #include <powerpc/ibm4xx/dcr4xx.h> 85 86 #include <powerpc/ibm4xx/dev/opbreg.h> 87 #include <powerpc/ibm4xx/dev/opbvar.h> 88 #include <powerpc/ibm4xx/dev/plbvar.h> 89 #include <powerpc/ibm4xx/dev/rgmiireg.h> 90 #include <powerpc/ibm4xx/dev/zmiireg.h> 91 92 #include <powerpc/spr.h> 93 #include <powerpc/ibm4xx/spr.h> 94 95 #include <powerpc/ibm4xx/ibm405gp.h> 96 #include <powerpc/ibm4xx/amcc405ex.h> 97 98 static int opb_get_frequency_405gp(void); 99 static int opb_get_frequency_405ex(void); 100 101 102 /* 103 * The devices on the On-chip Peripheral Bus to the 405GP/EX CPU. 104 */ 105 const struct opb_dev { 106 int pvr; 107 const char *name; 108 bus_addr_t addr; 109 int instance; 110 int irq; 111 int flags; 112 } opb_devs [] = { 113 /* IBM405GP */ 114 { IBM405GP, "com", IBM405GP_UART0_BASE, 0, 0, 0 }, 115 { IBM405GP, "com", IBM405GP_UART1_BASE, 1, 1, 0 }, 116 { IBM405GP, "emac", IBM405GP_EMAC0_BASE, 0, 15, 0 }, 117 { IBM405GP, "opbgpio", IBM405GP_GPIO0_BASE, 0, -1, 0 }, 118 { IBM405GP, "gpiic",IBM405GP_IIC0_BASE, 0, 2, 0 }, 119 { IBM405GP, "wdog", -1, 0, -1, 0 }, 120 121 /* IBM405GPR */ 122 { IBM405GPR, "com", IBM405GP_UART0_BASE, 0, 0, 0 }, 123 { IBM405GPR, "com", IBM405GP_UART1_BASE, 1, 1, 0 }, 124 { IBM405GPR, "emac", IBM405GP_EMAC0_BASE, 0, 15, 0 }, 125 { IBM405GPR, "opbgpio", IBM405GP_GPIO0_BASE, 0, -1, 0 }, 126 { IBM405GPR, "gpiic",IBM405GP_IIC0_BASE, 0, 2, 0 }, 127 { IBM405GPR, "wdog", -1, 0, -1, 0 }, 128 129 /* AMCC405EX */ 130 { AMCC405EX, "gpt", AMCC405EX_GPT0_BASE, 0, -1, 0 }, 131 { AMCC405EX, "com", AMCC405EX_UART0_BASE, 0, 26, 0 }, 132 { AMCC405EX, "com", AMCC405EX_UART1_BASE, 1, 1, 0 }, 133 { AMCC405EX, "gpiic",AMCC405EX_IIC0_BASE, 0, 2, 0 }, 134 { AMCC405EX, "gpiic",AMCC405EX_IIC1_BASE, 1, 7, 0 }, 135 { AMCC405EX, "scp", AMCC405EX_SCP0_BASE, 0, 8, 0 }, /* SPI */ 136 { AMCC405EX, "opbgpio", AMCC405EX_GPIO0_BASE, -1, -1, 0 }, 137 { AMCC405EX, "emac", AMCC405EX_EMAC0_BASE, 0, 24, 138 OPB_FLAGS_EMAC_GBE | OPB_FLAGS_EMAC_STACV2 | OPB_FLAGS_EMAC_HT256 |\ 139 OPB_FLAGS_EMAC_RMII_RGMII }, 140 { AMCC405EX, "emac", AMCC405EX_EMAC1_BASE, 1, 25, 141 OPB_FLAGS_EMAC_GBE | OPB_FLAGS_EMAC_STACV2 | OPB_FLAGS_EMAC_HT256 |\ 142 OPB_FLAGS_EMAC_RMII_RGMII }, 143 { AMCC405EX, "wdog", -1, 0, -1, 0 }, 144 145 { 0, NULL } 146 }; 147 148 int (*opb_get_frequency)(void); 149 const struct opb_param { 150 int pvr; 151 bus_addr_t base; 152 bus_addr_t limit; 153 int (*opb_get_frequency)(void); 154 bus_addr_t zmii_base; 155 bus_addr_t rgmii_base; 156 } opb_params[] = { 157 { IBM405GP, 158 IBM405GP_IP_BASE, IBM405GP_IP_BASE + OPBREG_SIZE, 159 opb_get_frequency_405gp, 160 0, 0 }, 161 { IBM405GPR, 162 IBM405GP_IP_BASE, IBM405GP_IP_BASE + OPBREG_SIZE, 163 opb_get_frequency_405gp, 164 0, 0 }, 165 { AMCC405EX, 166 AMCC405EX_OPB_BASE, AMCC405EX_OPB_BASE + OPBREG_SIZE, 167 opb_get_frequency_405ex, 168 0, AMCC405EX_RGMIIB0_BASE}, 169 170 { 0 } 171 }; 172 173 static int opb_match(device_t, cfdata_t, void *); 174 static void opb_attach(device_t, device_t, void *); 175 static int opb_submatch(device_t, cfdata_t, const int *, void *); 176 static int opb_print(void *, const char *); 177 178 CFATTACH_DECL_NEW(opb, sizeof(struct opb_softc), 179 opb_match, opb_attach, NULL, NULL); 180 181 static struct powerpc_bus_space opb_tag = { 182 _BUS_SPACE_BIG_ENDIAN|_BUS_SPACE_MEM_TYPE, 183 0x00000000, 184 }; 185 static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)] 186 __attribute__((aligned(8))); 187 static int opb_tag_init_done; 188 189 /* 190 * Probe for the opb; always succeeds. 191 */ 192 static int 193 opb_match(device_t parent, cfdata_t cf, void *aux) 194 { 195 struct opb_attach_args *oaa = aux; 196 197 /* match only opb devices */ 198 if (strcmp(oaa->opb_name, cf->cf_name) != 0) 199 return 0; 200 201 return 1; 202 } 203 204 static int 205 opb_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 206 { 207 struct opb_attach_args *oaa = aux; 208 209 if (cf->cf_loc[OPBCF_ADDR] != OPBCF_ADDR_DEFAULT && 210 cf->cf_loc[OPBCF_ADDR] != oaa->opb_addr) 211 return 0; 212 213 return config_match(parent, cf, aux); 214 } 215 216 /* 217 * Attach the on-chip peripheral bus. 218 */ 219 static void 220 opb_attach(device_t parent, device_t self, void *aux) 221 { 222 struct opb_softc *sc = device_private(self); 223 struct plb_attach_args *paa = aux; 224 struct opb_attach_args oaa; 225 int i, pvr; 226 227 aprint_naive("\n"); 228 aprint_normal("\n"); 229 pvr = mfpvr() >> 16; 230 231 sc->sc_dev = self; 232 sc->sc_iot = opb_get_bus_space_tag(); 233 234 for (i = 0; opb_params[i].pvr != 0 && opb_params[i].pvr != pvr; i++) 235 ; 236 if (opb_params[i].pvr == 0) 237 panic("opb_get_bus_space_tag: no params for this CPU!"); 238 opb_get_frequency = opb_params[i].opb_get_frequency; 239 #ifdef EMAC_ZMII_PHY 240 if (opb_params[i].zmii_base != 0) 241 bus_space_map(sc->sc_iot, opb_params[i].zmii_base, ZMII0_SIZE, 242 0, &sc->sc_zmiih); 243 #endif 244 #ifdef EMAC_RGMII_PHY 245 if (opb_params[i].rgmii_base != 0) 246 bus_space_map(sc->sc_iot, opb_params[i].rgmii_base, RGMII0_SIZE, 247 0, &sc->sc_rgmiih); 248 #endif 249 250 for (i = 0; opb_devs[i].name != NULL; i++) { 251 if (opb_devs[i].pvr != pvr) 252 continue; 253 oaa.opb_name = opb_devs[i].name; 254 oaa.opb_addr = opb_devs[i].addr; 255 oaa.opb_instance = opb_devs[i].instance; 256 oaa.opb_irq = opb_devs[i].irq; 257 oaa.opb_bt = sc->sc_iot; 258 oaa.opb_dmat = paa->plb_dmat; 259 oaa.opb_flags = opb_devs[i].flags; 260 261 config_found(self, &oaa, opb_print, 262 CFARGS(.submatch = opb_submatch)); 263 } 264 } 265 266 static int 267 opb_print(void *aux, const char *pnp) 268 { 269 struct opb_attach_args *oaa = aux; 270 271 if (pnp) 272 aprint_normal("%s at %s", oaa->opb_name, pnp); 273 274 if (oaa->opb_addr != OPBCF_ADDR_DEFAULT) 275 aprint_normal(" addr 0x%08lx", oaa->opb_addr); 276 if (oaa->opb_irq != OPBCF_IRQ_DEFAULT) 277 aprint_normal(" irq %d", oaa->opb_irq); 278 279 return UNCONF; 280 } 281 282 bus_space_tag_t 283 opb_get_bus_space_tag(void) 284 { 285 int i, pvr; 286 287 if (!opb_tag_init_done) { 288 pvr = mfpvr() >> 16; 289 290 for (i = 0; opb_params[i].pvr != 0 && opb_params[i].pvr != pvr; 291 i++) 292 ; 293 if (opb_params[i].pvr == 0) 294 panic("opb_get_bus_space_tag: no params for this CPU!"); 295 296 opb_tag.pbs_base = opb_params[i].base; 297 opb_tag.pbs_limit = opb_params[i].limit; 298 299 if (bus_space_init(&opb_tag, "opbtag", 300 ex_storage, sizeof(ex_storage))) 301 panic("opb_attach: Failed to initialise opb_tag"); 302 opb_tag_init_done = 1; 303 } 304 305 return &opb_tag; 306 } 307 308 static int 309 opb_get_frequency_405gp(void) 310 { 311 prop_number_t pn; 312 uint32_t pllmr; 313 unsigned int processor_freq, plb_freq, opb_freq; 314 315 pn = prop_dictionary_get(board_properties, "processor-frequency"); 316 KASSERT(pn != NULL); 317 processor_freq = (unsigned int) prop_number_integer_value(pn); 318 pllmr = mfdcr(DCR_CPC0_PLLMR); 319 plb_freq = processor_freq / CPC0_PLLMR_CBDV(pllmr); 320 opb_freq = plb_freq / CPC0_PLLMR_OPDV(pllmr); 321 322 return opb_freq; 323 } 324 325 static int 326 opb_get_frequency_405ex(void) 327 { 328 prop_number_t pn; 329 unsigned int processor_freq, plb_freq, opb_freq; 330 331 pn = prop_dictionary_get(board_properties, "processor-frequency"); 332 KASSERT(pn != NULL); 333 processor_freq = (unsigned int) prop_number_integer_value(pn); 334 plb_freq = processor_freq / CPR0_PLBDV0(mfcpr(DCR_CPR0_PLBD)); 335 opb_freq = plb_freq / CPR0_OPBDV0(mfcpr(DCR_CPR0_OPBD)); 336 337 return opb_freq; 338 } 339
Indexes created Sat Sep 20 22:09:52 GMT 2025