becc_pci.c revision 1.18
1 /* $NetBSD: becc_pci.c,v 1.18 2015/10/02 05:22:50 msaitoh 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 1.18 2015/10/02 05:22:50 msaitoh 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/extent.h> 53 #include <sys/malloc.h> 54 #include <sys/bus.h> 55 56 #include <uvm/uvm_extern.h> 57 58 #include <dev/pci/ppbreg.h> 59 #include <dev/pci/pcivar.h> 60 #include <dev/pci/pciconf.h> 61 62 #include <arm/locore.h> 63 64 #include <arm/xscale/beccreg.h> 65 #include <arm/xscale/beccvar.h> 66 67 void becc_pci_attach_hook(device_t, device_t, 68 struct pcibus_attach_args *); 69 int becc_pci_bus_maxdevs(void *, int); 70 pcitag_t becc_pci_make_tag(void *, int, int, int); 71 void becc_pci_decompose_tag(void *, pcitag_t, int *, int *, 72 int *); 73 pcireg_t becc_pci_conf_read(void *, pcitag_t, int); 74 void becc_pci_conf_write(void *, pcitag_t, int, pcireg_t); 75 void becc_pci_conf_interrupt(void *, int, int, int, int, int *); 76 77 int becc_pci_intr_map(const struct pci_attach_args *, 78 pci_intr_handle_t *); 79 const char *becc_pci_intr_string(void *, pci_intr_handle_t, 80 char *, size_t); 81 const struct evcnt *becc_pci_intr_evcnt(void *, pci_intr_handle_t); 82 void *becc_pci_intr_establish(void *, pci_intr_handle_t, 83 int, int (*)(void *), void *); 84 void becc_pci_intr_disestablish(void *, void *); 85 86 #define PCI_CONF_LOCK(s) (s) = disable_interrupts(I32_bit) 87 #define PCI_CONF_UNLOCK(s) restore_interrupts((s)) 88 89 #if 0 90 #define DPRINTF(x) printf(x) 91 #else 92 #define DPRINTF(x) 93 #endif 94 95 void 96 becc_pci_init(pci_chipset_tag_t pc, void *cookie) 97 { 98 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 99 struct becc_softc *sc = cookie; 100 struct extent *ioext, *memext; 101 #endif 102 103 pc->pc_conf_v = cookie; 104 pc->pc_attach_hook = becc_pci_attach_hook; 105 pc->pc_bus_maxdevs = becc_pci_bus_maxdevs; 106 pc->pc_make_tag = becc_pci_make_tag; 107 pc->pc_decompose_tag = becc_pci_decompose_tag; 108 pc->pc_conf_read = becc_pci_conf_read; 109 pc->pc_conf_write = becc_pci_conf_write; 110 pc->pc_conf_interrupt = becc_pci_conf_interrupt; 111 112 pc->pc_intr_v = cookie; 113 pc->pc_intr_map = becc_pci_intr_map; 114 pc->pc_intr_string = becc_pci_intr_string; 115 pc->pc_intr_evcnt = becc_pci_intr_evcnt; 116 pc->pc_intr_establish = becc_pci_intr_establish; 117 pc->pc_intr_disestablish = becc_pci_intr_disestablish; 118 119 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 120 /* 121 * Configure the PCI bus. 122 * 123 * XXX We need to revisit this. We only configure the Secondary 124 * bus (and its children). The bus configure code needs changes 125 * to support how the busses are arranged on this chip. We also 126 * need to only configure devices in the private device space on 127 * the Secondary bus. 128 */ 129 130 /* Reserve the bottom 32K of the PCI address space. */ 131 ioext = extent_create("pciio", sc->sc_ioout_xlate + (32 * 1024), 132 sc->sc_ioout_xlate + (64 * 1024) - 1, 133 NULL, 0, EX_NOWAIT); 134 memext = extent_create("pcimem", sc->sc_owin_xlate[0], 135 sc->sc_owin_xlate[0] + BECC_PCI_MEM1_SIZE - 1, 136 NULL, 0, EX_NOWAIT); 137 138 aprint_normal("%s: configuring PCI bus\n", device_xname(sc->sc_dev)); 139 pci_configure_bus(pc, ioext, memext, NULL, 0, arm_dcache_align); 140 141 extent_destroy(ioext); 142 extent_destroy(memext); 143 #endif 144 } 145 146 void 147 becc_pci_conf_interrupt(void *v, int a, int b, int c, int d, int *p) 148 { 149 } 150 151 void 152 becc_pci_attach_hook(device_t parent, device_t self, 153 struct pcibus_attach_args *pba) 154 { 155 156 /* Nothing to do. */ 157 } 158 159 int 160 becc_pci_bus_maxdevs(void *v, int busno) 161 { 162 163 return (32); 164 } 165 166 pcitag_t 167 becc_pci_make_tag(void *v, int b, int d, int f) 168 { 169 170 return ((b << 16) | (d << 11) | (f << 8)); 171 } 172 173 void 174 becc_pci_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 175 { 176 177 if (bp != NULL) 178 *bp = (tag >> 16) & 0xff; 179 if (dp != NULL) 180 *dp = (tag >> 11) & 0x1f; 181 if (fp != NULL) 182 *fp = (tag >> 8) & 0x7; 183 } 184 185 struct pciconf_state { 186 uint32_t ps_offset; 187 188 int ps_b, ps_d, ps_f; 189 int ps_type; 190 }; 191 192 static int 193 becc_pci_conf_setup(struct becc_softc *sc, pcitag_t tag, int offset, 194 struct pciconf_state *ps) 195 { 196 197 if ((unsigned int)offset >= PCI_CONF_SIZE) 198 return (1); 199 200 becc_pci_decompose_tag(sc, tag, &ps->ps_b, &ps->ps_d, &ps->ps_f); 201 202 /* 203 * If the bus # is the same as our own, then use Type 0 cycles, 204 * else use Type 1. 205 */ 206 if (ps->ps_b == 0) { 207 /* XXX This is a platform-specific parameter. */ 208 if (ps->ps_d > (14 - BECC_IDSEL_BIT)) 209 return (1); 210 ps->ps_offset = (1U << (ps->ps_d + BECC_IDSEL_BIT)) | 211 (ps->ps_f << 8) | offset; 212 ps->ps_type = 0; 213 } else { 214 /* The tag is already in the correct format. */ 215 ps->ps_offset = tag | offset | 1; 216 ps->ps_type = 1; 217 } 218 219 return (0); 220 } 221 222 static int becc_pci_conf_cleanup(struct becc_softc *sc); 223 static int 224 becc_pci_conf_cleanup(struct becc_softc *sc) 225 { 226 uint32_t reg; 227 int err=0; 228 229 BECC_CSR_WRITE(BECC_POCR, 0); 230 231 reg = becc_pcicore_read(sc, PCI_COMMAND_STATUS_REG); 232 if (reg & 0xf9000000) { 233 DPRINTF((" ** pci status error: %08x (%08x) **\n", 234 reg, reg & 0xf9000000)); 235 236 err = 1; 237 becc_pcicore_write(sc, PCI_COMMAND_STATUS_REG, 238 reg & 0xf900ffff); 239 reg = becc_pcicore_read(sc, PCI_COMMAND_STATUS_REG); 240 241 DPRINTF((" ** pci status after clearing: %08x (%08x) **\n", 242 reg, reg & 0xf9000000)); 243 } 244 reg = BECC_CSR_READ(BECC_PMISR); 245 if (reg & 0x000f000d) { 246 DPRINTF((" ** pci master isr: %08x (%08x) **\n", 247 reg, reg & 0x000f000d)); 248 249 err = 1; 250 BECC_CSR_WRITE(BECC_PMISR, reg & 0x000f000d); 251 reg = BECC_CSR_READ(BECC_PMISR); 252 253 DPRINTF((" ** pci master isr after clearing: %08x (%08x) **\n", 254 reg, reg & 0x000f000d)); 255 } 256 reg = BECC_CSR_READ(BECC_PSISR); 257 if (reg & 0x000f0210) { 258 DPRINTF((" ** pci slave isr: %08x (%08x) **\n", 259 reg, reg & 0x000f0210)); 260 261 err = 1; 262 BECC_CSR_WRITE(BECC_PSISR, reg & 0x000f0210); 263 reg = BECC_CSR_READ(BECC_PSISR); 264 265 DPRINTF((" ** pci slave isr after clearing: %08x (%08x) **\n", 266 reg, reg & 0x000f0210)); 267 } 268 269 return err; 270 } 271 272 pcireg_t 273 becc_pci_conf_read(void *v, pcitag_t tag, int offset) 274 { 275 struct becc_softc *sc = v; 276 struct pciconf_state ps; 277 vaddr_t va; 278 pcireg_t rv; 279 u_int s; 280 281 if (becc_pci_conf_setup(sc, tag, offset, &ps)) 282 return ((pcireg_t) -1); 283 284 /* 285 * Skip device 0 (the BECC itself). We don't want it 286 * to appear as part of the PCI device space. 287 */ 288 if (ps.ps_b == 0 && ps.ps_d == 0) 289 return ((pcireg_t) -1); 290 291 PCI_CONF_LOCK(s); 292 293 va = sc->sc_pci_cfg_base + ps.ps_offset; 294 BECC_CSR_WRITE(BECC_POCR, ps.ps_type); 295 296 if (badaddr_read((void *) va, sizeof(rv), &rv)) { 297 /* XXX Check master/target abort? */ 298 #if 0 299 printf("conf_read: %d/%d/%d bad address\n", 300 ps.ps_b, ps.ps_d, ps.ps_f); 301 #endif 302 rv = (pcireg_t) -1; 303 } 304 305 if (becc_pci_conf_cleanup(sc)) 306 rv = (pcireg_t) -1; 307 308 PCI_CONF_UNLOCK(s); 309 310 return (rv); 311 } 312 313 void 314 becc_pci_conf_write(void *v, pcitag_t tag, int offset, pcireg_t val) 315 { 316 struct becc_softc *sc = v; 317 struct pciconf_state ps; 318 vaddr_t va; 319 u_int s; 320 321 if (becc_pci_conf_setup(sc, tag, offset, &ps)) 322 return; 323 324 PCI_CONF_LOCK(s); 325 BECC_CSR_WRITE(BECC_POCR, ps.ps_type); 326 327 va = sc->sc_pci_cfg_base + ps.ps_offset; 328 329 *(volatile pcireg_t *)va = val; 330 331 becc_pci_conf_cleanup(sc); 332 333 PCI_CONF_UNLOCK(s); 334 } 335 336 int 337 becc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 338 { 339 int irq; 340 341 if (pa->pa_bus == 0) { 342 switch (pa->pa_device) { 343 case 1: irq = ICU_PCI_INTB; break; /* Ethernet #0 */ 344 case 2: irq = ICU_PCI_INTC; break; /* Ethernet #1 */ 345 case 3: /* Card slot */ 346 switch (pa->pa_intrpin) { 347 case 1: irq = ICU_PCI_INTA; break; 348 case 2: irq = ICU_PCI_INTB; break; 349 case 3: irq = ICU_PCI_INTC; break; 350 case 4: irq = ICU_PCI_INTD; break; 351 default: 352 printf("becc_pci_intr_map: bogus pin: %d\n", 353 pa->pa_intrpin); 354 return (1); 355 } 356 break; 357 default: 358 printf("becc_pci_intr_map: bogus device: %d\n", 359 pa->pa_device); 360 return (1); 361 } 362 } else { 363 switch (pa->pa_intrpin) { 364 case 1: irq = ICU_PCI_INTA; break; 365 case 2: irq = ICU_PCI_INTB; break; 366 case 3: irq = ICU_PCI_INTC; break; 367 case 4: irq = ICU_PCI_INTD; break; 368 default: 369 printf("becc_pci_intr_map: bogus pin: %d\n", 370 pa->pa_intrpin); 371 return (1); 372 } 373 } 374 375 *ihp = irq; 376 return (0); 377 } 378 379 const char * 380 becc_pci_intr_string(void *v, pci_intr_handle_t ih, char *buf, size_t len) 381 { 382 383 strlcpy(buf, becc_irqnames[ih], len); 384 return buf; 385 } 386 387 const struct evcnt * 388 becc_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 389 { 390 391 /* XXX For now. */ 392 return (NULL); 393 } 394 395 void * 396 becc_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl, 397 int (*func)(void *), void *arg) 398 { 399 400 return (becc_intr_establish(ih, ipl, func, arg)); 401 } 402 403 void 404 becc_pci_intr_disestablish(void *v, void *cookie) 405 { 406 407 becc_intr_disestablish(cookie); 408 } 409
Indexes created Mon Sep 22 21:09:42 GMT 2025