1 /* $NetBSD: becc_pci.c,v 1.22 2022/09/27 06:36:43 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe 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 * PCI configuration support for the ADI Engineering Big Endian Companion 40 * Chip. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: becc_pci.c,v 1.22 2022/09/27 06:36:43 skrll Exp $"); 45 46 #include "opt_pci.h" 47 #include "pci.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/device.h> 52 #include <sys/bus.h> 53 54 #include <uvm/uvm_extern.h> 55 56 #include <dev/pci/ppbreg.h> 57 #include <dev/pci/pcivar.h> 58 #include <dev/pci/pciconf.h> 59 60 #include <arm/locore.h> 61 62 #include <arm/xscale/beccreg.h> 63 #include <arm/xscale/beccvar.h> 64 65 void becc_pci_attach_hook(device_t, device_t, 66 struct pcibus_attach_args *); 67 int becc_pci_bus_maxdevs(void *, int); 68 pcitag_t becc_pci_make_tag(void *, int, int, int); 69 void becc_pci_decompose_tag(void *, pcitag_t, int *, int *, 70 int *); 71 pcireg_t becc_pci_conf_read(void *, pcitag_t, int); 72 void becc_pci_conf_write(void *, pcitag_t, int, pcireg_t); 73 void becc_pci_conf_interrupt(void *, int, int, int, int, int *); 74 75 int becc_pci_intr_map(const struct pci_attach_args *, 76 pci_intr_handle_t *); 77 const char *becc_pci_intr_string(void *, pci_intr_handle_t, 78 char *, size_t); 79 const struct evcnt *becc_pci_intr_evcnt(void *, pci_intr_handle_t); 80 void *becc_pci_intr_establish(void *, pci_intr_handle_t, 81 int, int (*)(void *), void *, const char *); 82 void becc_pci_intr_disestablish(void *, void *); 83 84 #define PCI_CONF_LOCK(s) (s) = disable_interrupts(I32_bit) 85 #define PCI_CONF_UNLOCK(s) restore_interrupts((s)) 86 87 #if 0 88 #define DPRINTF(x) printf(x) 89 #else 90 #define DPRINTF(x) 91 #endif 92 93 void 94 becc_pci_init(pci_chipset_tag_t pc, void *cookie) 95 { 96 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 97 struct becc_softc *sc = cookie; 98 struct pciconf_resources *pcires; 99 #endif 100 101 pc->pc_conf_v = cookie; 102 pc->pc_attach_hook = becc_pci_attach_hook; 103 pc->pc_bus_maxdevs = becc_pci_bus_maxdevs; 104 pc->pc_make_tag = becc_pci_make_tag; 105 pc->pc_decompose_tag = becc_pci_decompose_tag; 106 pc->pc_conf_read = becc_pci_conf_read; 107 pc->pc_conf_write = becc_pci_conf_write; 108 pc->pc_conf_interrupt = becc_pci_conf_interrupt; 109 110 pc->pc_intr_v = cookie; 111 pc->pc_intr_map = becc_pci_intr_map; 112 pc->pc_intr_string = becc_pci_intr_string; 113 pc->pc_intr_evcnt = becc_pci_intr_evcnt; 114 pc->pc_intr_establish = becc_pci_intr_establish; 115 pc->pc_intr_disestablish = becc_pci_intr_disestablish; 116 117 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 118 /* 119 * Configure the PCI bus. 120 * 121 * XXX We need to revisit this. We only configure the Secondary 122 * bus (and its children). The bus configure code needs changes 123 * to support how the busses are arranged on this chip. We also 124 * need to only configure devices in the private device space on 125 * the Secondary bus. 126 */ 127 128 pcires = pciconf_resource_init(); 129 130 /* Reserve the bottom 32K of the PCI address space. */ 131 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 132 sc->sc_ioout_xlate + (32 * 1024), (32 * 1024)); 133 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 134 sc->sc_owin_xlate[0], BECC_PCI_MEM1_SIZE); 135 136 aprint_normal("%s: configuring PCI bus\n", device_xname(sc->sc_dev)); 137 pci_configure_bus(pc, pcires, 0, arm_dcache_align); 138 139 pciconf_resource_fini(pcires); 140 #endif 141 } 142 143 void 144 becc_pci_conf_interrupt(void *v, int a, int b, int c, int d, int *p) 145 { 146 } 147 148 void 149 becc_pci_attach_hook(device_t parent, device_t self, 150 struct pcibus_attach_args *pba) 151 { 152 153 /* Nothing to do. */ 154 } 155 156 int 157 becc_pci_bus_maxdevs(void *v, int busno) 158 { 159 160 return (32); 161 } 162 163 pcitag_t 164 becc_pci_make_tag(void *v, int b, int d, int f) 165 { 166 167 return ((b << 16) | (d << 11) | (f << 8)); 168 } 169 170 void 171 becc_pci_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 172 { 173 174 if (bp != NULL) 175 *bp = (tag >> 16) & 0xff; 176 if (dp != NULL) 177 *dp = (tag >> 11) & 0x1f; 178 if (fp != NULL) 179 *fp = (tag >> 8) & 0x7; 180 } 181 182 struct pciconf_state { 183 uint32_t ps_offset; 184 185 int ps_b, ps_d, ps_f; 186 int ps_type; 187 }; 188 189 static int 190 becc_pci_conf_setup(struct becc_softc *sc, pcitag_t tag, int offset, 191 struct pciconf_state *ps) 192 { 193 194 if ((unsigned int)offset >= PCI_CONF_SIZE) 195 return (1); 196 197 becc_pci_decompose_tag(sc, tag, &ps->ps_b, &ps->ps_d, &ps->ps_f); 198 199 /* 200 * If the bus # is the same as our own, then use Type 0 cycles, 201 * else use Type 1. 202 */ 203 if (ps->ps_b == 0) { 204 /* XXX This is a platform-specific parameter. */ 205 if (ps->ps_d > (14 - BECC_IDSEL_BIT)) 206 return (1); 207 ps->ps_offset = (1U << (ps->ps_d + BECC_IDSEL_BIT)) | 208 (ps->ps_f << 8) | offset; 209 ps->ps_type = 0; 210 } else { 211 /* The tag is already in the correct format. */ 212 ps->ps_offset = tag | offset | 1; 213 ps->ps_type = 1; 214 } 215 216 return (0); 217 } 218 219 static int becc_pci_conf_cleanup(struct becc_softc *sc); 220 static int 221 becc_pci_conf_cleanup(struct becc_softc *sc) 222 { 223 uint32_t reg; 224 int err=0; 225 226 BECC_CSR_WRITE(BECC_POCR, 0); 227 228 reg = becc_pcicore_read(sc, PCI_COMMAND_STATUS_REG); 229 if (reg & 0xf9000000) { 230 DPRINTF((" ** pci status error: %08x (%08x) **\n", 231 reg, reg & 0xf9000000)); 232 233 err = 1; 234 becc_pcicore_write(sc, PCI_COMMAND_STATUS_REG, 235 reg & 0xf900ffff); 236 reg = becc_pcicore_read(sc, PCI_COMMAND_STATUS_REG); 237 238 DPRINTF((" ** pci status after clearing: %08x (%08x) **\n", 239 reg, reg & 0xf9000000)); 240 } 241 reg = BECC_CSR_READ(BECC_PMISR); 242 if (reg & 0x000f000d) { 243 DPRINTF((" ** pci master isr: %08x (%08x) **\n", 244 reg, reg & 0x000f000d)); 245 246 err = 1; 247 BECC_CSR_WRITE(BECC_PMISR, reg & 0x000f000d); 248 reg = BECC_CSR_READ(BECC_PMISR); 249 250 DPRINTF((" ** pci master isr after clearing: %08x (%08x) **\n", 251 reg, reg & 0x000f000d)); 252 } 253 reg = BECC_CSR_READ(BECC_PSISR); 254 if (reg & 0x000f0210) { 255 DPRINTF((" ** pci slave isr: %08x (%08x) **\n", 256 reg, reg & 0x000f0210)); 257 258 err = 1; 259 BECC_CSR_WRITE(BECC_PSISR, reg & 0x000f0210); 260 reg = BECC_CSR_READ(BECC_PSISR); 261 262 DPRINTF((" ** pci slave isr after clearing: %08x (%08x) **\n", 263 reg, reg & 0x000f0210)); 264 } 265 266 return err; 267 } 268 269 pcireg_t 270 becc_pci_conf_read(void *v, pcitag_t tag, int offset) 271 { 272 struct becc_softc *sc = v; 273 struct pciconf_state ps; 274 vaddr_t va; 275 pcireg_t rv; 276 u_int s; 277 278 if (becc_pci_conf_setup(sc, tag, offset, &ps)) 279 return ((pcireg_t) -1); 280 281 /* 282 * Skip device 0 (the BECC itself). We don't want it 283 * to appear as part of the PCI device space. 284 */ 285 if (ps.ps_b == 0 && ps.ps_d == 0) 286 return ((pcireg_t) -1); 287 288 PCI_CONF_LOCK(s); 289 290 va = sc->sc_pci_cfg_base + ps.ps_offset; 291 BECC_CSR_WRITE(BECC_POCR, ps.ps_type); 292 293 if (badaddr_read((void *) va, sizeof(rv), &rv)) { 294 /* XXX Check master/target abort? */ 295 #if 0 296 printf("conf_read: %d/%d/%d bad address\n", 297 ps.ps_b, ps.ps_d, ps.ps_f); 298 #endif 299 rv = (pcireg_t) -1; 300 } 301 302 if (becc_pci_conf_cleanup(sc)) 303 rv = (pcireg_t) -1; 304 305 PCI_CONF_UNLOCK(s); 306 307 return (rv); 308 } 309 310 void 311 becc_pci_conf_write(void *v, pcitag_t tag, int offset, pcireg_t val) 312 { 313 struct becc_softc *sc = v; 314 struct pciconf_state ps; 315 vaddr_t va; 316 u_int s; 317 318 if (becc_pci_conf_setup(sc, tag, offset, &ps)) 319 return; 320 321 PCI_CONF_LOCK(s); 322 BECC_CSR_WRITE(BECC_POCR, ps.ps_type); 323 324 va = sc->sc_pci_cfg_base + ps.ps_offset; 325 326 *(volatile pcireg_t *)va = val; 327 328 becc_pci_conf_cleanup(sc); 329 330 PCI_CONF_UNLOCK(s); 331 } 332 333 int 334 becc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 335 { 336 int irq; 337 338 if (pa->pa_bus == 0) { 339 switch (pa->pa_device) { 340 case 1: irq = ICU_PCI_INTB; break; /* Ethernet #0 */ 341 case 2: irq = ICU_PCI_INTC; break; /* Ethernet #1 */ 342 case 3: /* Card slot */ 343 switch (pa->pa_intrpin) { 344 case 1: irq = ICU_PCI_INTA; break; 345 case 2: irq = ICU_PCI_INTB; break; 346 case 3: irq = ICU_PCI_INTC; break; 347 case 4: irq = ICU_PCI_INTD; break; 348 default: 349 printf("becc_pci_intr_map: bogus pin: %d\n", 350 pa->pa_intrpin); 351 return (1); 352 } 353 break; 354 default: 355 printf("becc_pci_intr_map: bogus device: %d\n", 356 pa->pa_device); 357 return (1); 358 } 359 } else { 360 switch (pa->pa_intrpin) { 361 case 1: irq = ICU_PCI_INTA; break; 362 case 2: irq = ICU_PCI_INTB; break; 363 case 3: irq = ICU_PCI_INTC; break; 364 case 4: irq = ICU_PCI_INTD; break; 365 default: 366 printf("becc_pci_intr_map: bogus pin: %d\n", 367 pa->pa_intrpin); 368 return (1); 369 } 370 } 371 372 *ihp = irq; 373 return (0); 374 } 375 376 const char * 377 becc_pci_intr_string(void *v, pci_intr_handle_t ih, char *buf, size_t len) 378 { 379 380 strlcpy(buf, becc_irqnames[ih], len); 381 return buf; 382 } 383 384 const struct evcnt * 385 becc_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 386 { 387 388 /* XXX For now. */ 389 return (NULL); 390 } 391 392 void * 393 becc_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl, 394 int (*func)(void *), void *arg, const char *xname) 395 { 396 397 return (becc_intr_establish(ih, ipl, func, arg)); 398 } 399 400 void 401 becc_pci_intr_disestablish(void *v, void *cookie) 402 { 403 404 becc_intr_disestablish(cookie); 405 } 406
Indexes created Sat Sep 20 22:09:52 GMT 2025