rk3399_pcie.c revision 1.13
1 /* $NetBSD: rk3399_pcie.c,v 1.13 2021/01/15 00:38:23 jmcneill Exp $ */ 2 /* 3 * Copyright (c) 2018 Mark Kettenis <kettenis (at) openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/cdefs.h> 19 20 __KERNEL_RCSID(1, "$NetBSD: rk3399_pcie.c,v 1.13 2021/01/15 00:38:23 jmcneill Exp $"); 21 22 #include <sys/param.h> 23 #include <sys/systm.h> 24 #include <sys/bitops.h> 25 #include <sys/device.h> 26 #include <sys/kmem.h> 27 28 #include <machine/intr.h> 29 #include <sys/bus.h> 30 #include <dev/fdt/fdtvar.h> 31 #include <dev/fdt/syscon.h> 32 #include <arm/cpufunc.h> 33 34 #include <dev/pci/pcidevs.h> 35 #include <dev/pci/pcireg.h> 36 #include <dev/pci/pcivar.h> 37 #include <dev/pci/pciconf.h> 38 39 #include <arm/fdt/pcihost_fdtvar.h> 40 #include <sys/gpio.h> 41 42 #define SETREG(m, v) ((m)<<16|__SHIFTIN((v), (m))) 43 #define GETREG(m, v) (__SHIFTOUT((v), (m))) 44 45 /* APB region */ 46 #define PCIE_CLIENT_BASE 0x000000 47 #define PCIE_CLIENT_BASIC_STRAP_CONF 0x0000 48 #define PCBSC_PCIE_GEN_SEL __BIT(7) 49 #define PCBSC_PGS_GEN1 SETREG(PCBSC_PCIE_GEN_SEL, 0) 50 #define PCBSC_PGS_GEN2 SETREG(PCBSC_PCIE_GEN_SEL, 1) 51 #define PCBSC_MODE_SELECT __BIT(6) 52 #define PCBSC_MS_ENDPOINT SETREG(PCBSC_MODE_SELECT, 0) 53 #define PCBSC_MS_ROOTPORT SETREG(PCBSC_MODE_SELECT, 1) 54 #define PCBSC_LANE_COUNT __BITS(5,4) 55 #define PCBSC_LC(x) SETREG(PCBSC_LANE_COUNT, ilog2(x)) /* valid for x1,2,4 */ 56 #define PCBSC_ARI_EN SETREG(__BIT(3), 1) /* Alternate Routing ID Enable */ 57 #define PCBSC_SR_IOV_EN SETREG(__BIT(2), 1) 58 #define PCBSC_LINK_TRAIN_EN SETREG(__BIT(1), 1) 59 #define PCBSC_CONF_EN SETREG(__BIT(0), 1) /* Config enable */ 60 #define PCIE_CLIENT_DEBUG_OUT_0 0x003c 61 #define PCIE_CLIENT_DEBUG_OUT_1 0x0040 62 #define PCIE_CLIENT_BASIC_STATUS0 0x0044 63 #define PCIE_CLIENT_BASIC_STATUS1 0x0048 64 #define PCBS1_LINK_ST(x) (u_int)__SHIFTOUT((x), __BITS(21,20)) 65 #define PCBS1_LS_NO_RECV 0 /* no receivers */ 66 #define PCBS1_LS_TRAINING 1 /* link training */ 67 #define PCBS1_LS_DL_INIT 2 /* link up, DL init progressing */ 68 #define PCBS1_LS_DL_DONE 3 /* link up, DL init complete */ 69 #define PCIE_CLIENT_INT_MASK 0x004c 70 #define PCIM_INTx_MASK(x) SETREG(__BIT((x)+5), 1) 71 #define PCIM_INTx_ENAB(x) SETREG(__BIT((x)+5), 0) 72 73 #define PCIE_CORE_BASE 0x800000 74 #define PCIE_RC_NORMAL_BASE (PCIE_CORE_BASE + 0x00000) 75 76 #define PCIE_LM_BASE 0x900000 77 #define PCIE_LM_CORE_CTRL (PCIE_LM_BASE + 0x00) 78 #define PCIE_CORE_PL_CONF_SPEED_5G 0x00000008 79 #define PCIE_CORE_PL_CONF_SPEED_MASK 0x00000018 80 #define PCIE_CORE_PL_CONF_LANE_MASK 0x00000006 81 #define PCIE_CORE_PL_CONF_LANE_SHIFT 1 82 #define PCIE_LM_PLC1 (PCIE_LM_BASE + 0x04) 83 #define PCIE_LM_PLC1_FTS_MASK __BITS(23, 8) 84 #define PCIE_LM_VENDOR_ID (PCIE_LM_BASE + 0x44) 85 #define PCIE_LM_LINKWIDTH (PCIE_LM_BASE + 0x50) 86 #define PCIE_LM_LANEMAP (PCIE_LM_BASE + 0x200) 87 #define PCIE_LM_DEBUG_MUX_CONTROL (PCIE_LM_BASE + 0x208) 88 #define PCIE_LM_RCBAR (PCIE_LM_BASE + 0x300) 89 #define PCIE_LM_RCBARPME __BIT(17) 90 #define PCIE_LM_RCBARPMS __BIT(18) 91 #define PCIE_LM_RCBARPIE __BIT(19) 92 #define PCIE_LM_RCBARPIS __BIT(20) 93 94 #define PCIE_RC_BASE 0xa00000 95 #define PCIE_RC_CONFIG_DCSR (PCIE_RC_BASE + 0x0c0 + PCIE_DCSR) 96 #define PCIE_RC_PCIE_LCAP (PCIE_RC_BASE + 0x0c0 + PCIE_LCAP) 97 #define PCIE_RC_CONFIG_LCSR (PCIE_RC_BASE + 0x0c0 + PCIE_LCSR) 98 #define PCIE_RC_CONFIG_THP_CAP (PCIE_RC_BASE + 0x274) 99 #define PCIE_RC_CONFIG_THP_CAP_NEXT_MASK __BITS(31, 20) 100 101 102 #define PCIE_ATR_BASE 0xc00000 103 #define PCIE_ATR_OB_ADDR0(i) (PCIE_ATR_BASE + 0x000 + (i) * 0x20) 104 #define PCIE_ATR_OB_ADDR1(i) (PCIE_ATR_BASE + 0x004 + (i) * 0x20) 105 #define PCIE_ATR_OB_DESC0(i) (PCIE_ATR_BASE + 0x008 + (i) * 0x20) 106 #define PCIE_ATR_OB_DESC1(i) (PCIE_ATR_BASE + 0x00c + (i) * 0x20) 107 #define PCIE_ATR_IB_ADDR0(i) (PCIE_ATR_BASE + 0x800 + (i) * 0x8) 108 #define PCIE_ATR_IB_ADDR1(i) (PCIE_ATR_BASE + 0x804 + (i) * 0x8) 109 #define PCIE_ATR_HDR_MEM 0x2 110 #define PCIE_ATR_HDR_IO 0x6 111 #define PCIE_ATR_HDR_CFG_TYPE0 0xa 112 #define PCIE_ATR_HDR_CFG_TYPE1 0xb 113 #define PCIE_ATR_HDR_RID __BIT(23) 114 115 /* AXI region */ 116 #define PCIE_ATR_OB_REGION0_SIZE (32 * 1024 * 1024) 117 #define PCIE_ATR_OB_REGION_SIZE (1 * 1024 * 1024) 118 119 #define HREAD4(sc, reg) \ 120 bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)) 121 #define HWRITE4(sc, reg, val) \ 122 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 123 #define AXIPEEK4(sc, reg, valp) \ 124 bus_space_peek_4((sc)->sc_iot, (sc)->sc_axi_ioh, (reg), (valp)) 125 #define AXIPOKE4(sc, reg, val) \ 126 bus_space_poke_4((sc)->sc_iot, (sc)->sc_axi_ioh, (reg), (val)) 127 128 struct rkpcie_softc { 129 struct pcihost_softc sc_phsc; 130 bus_space_tag_t sc_iot; 131 bus_space_handle_t sc_ioh; 132 bus_space_handle_t sc_axi_ioh; 133 bus_addr_t sc_axi_addr; 134 bus_addr_t sc_apb_addr; 135 bus_size_t sc_axi_size; 136 bus_size_t sc_apb_size; 137 kmutex_t sc_conf_lock; 138 }; 139 140 static int rkpcie_match(device_t, cfdata_t, void *); 141 static void rkpcie_attach(device_t, device_t, void *); 142 143 CFATTACH_DECL_NEW(rkpcie, sizeof(struct rkpcie_softc), 144 rkpcie_match, rkpcie_attach, NULL, NULL); 145 146 static int 147 rkpcie_match(device_t parent, cfdata_t cf, void *aux) 148 { 149 const char * const compatible[] = { 150 "rockchip,rk3399-pcie", 151 NULL 152 }; 153 struct fdt_attach_args *faa = aux; 154 155 return of_match_compatible(faa->faa_phandle, compatible); 156 } 157 158 static void rkpcie_atr_init(struct rkpcie_softc *); 159 160 static int rkpcie_bus_maxdevs(void *, int); 161 static pcitag_t rkpcie_make_tag(void *, int, int, int); 162 static void rkpcie_decompose_tag(void *, pcitag_t, int *, int *, int *); 163 static pcireg_t rkpcie_conf_read(void *, pcitag_t, int); 164 static void rkpcie_conf_write(void *, pcitag_t, int, pcireg_t); 165 static int rkpcie_conf_hook(void *, int, int, int, pcireg_t); 166 167 static struct fdtbus_interrupt_controller_func rkpcie_intrfuncs; 168 169 static inline void 170 clock_enable_all(int phandle) 171 { 172 for (u_int i = 0; i < 4; i++) { 173 struct clk * clk = fdtbus_clock_get_index(phandle, i); 174 if (clk == NULL) 175 continue; 176 if (clk_enable(clk) != 0) 177 continue; 178 } 179 } 180 181 static void 182 reset_assert(int phandle, const char *name) 183 { 184 struct fdtbus_reset *rst; 185 186 rst = fdtbus_reset_get(phandle, name); 187 fdtbus_reset_assert(rst); 188 fdtbus_reset_put(rst); 189 } 190 191 static void 192 reset_deassert(int phandle, const char *name) 193 { 194 struct fdtbus_reset *rst; 195 196 rst = fdtbus_reset_get(phandle, name); 197 fdtbus_reset_deassert(rst); 198 fdtbus_reset_put(rst); 199 } 200 201 static void 202 rkpcie_attach(device_t parent, device_t self, void *aux) 203 { 204 struct rkpcie_softc *sc = device_private(self); 205 struct pcihost_softc * const phsc = &sc->sc_phsc; 206 struct fdt_attach_args *faa = aux; 207 struct fdtbus_gpio_pin *ep_gpio; 208 u_int max_link_speed, num_lanes; 209 struct fdtbus_phy *phy[4]; 210 const u_int *bus_range; 211 uint32_t status; 212 int timo, len; 213 214 phsc->sc_dev = self; 215 phsc->sc_bst = faa->faa_bst; 216 phsc->sc_dmat = faa->faa_dmat; 217 sc->sc_iot = phsc->sc_bst; 218 phsc->sc_phandle = faa->faa_phandle; 219 const int phandle = phsc->sc_phandle; 220 221 if (fdtbus_get_reg_byname(faa->faa_phandle, "axi-base", &sc->sc_axi_addr, &sc->sc_axi_size) != 0) { 222 aprint_error(": couldn't get axi registers\n"); 223 return; 224 } 225 if (fdtbus_get_reg_byname(faa->faa_phandle, "apb-base", &sc->sc_apb_addr, &sc->sc_apb_size) != 0) { 226 aprint_error(": couldn't get apb registers\n"); 227 sc->sc_axi_size = 0; 228 return; 229 } 230 231 const int mapflags = _ARM_BUS_SPACE_MAP_STRONGLY_ORDERED; 232 if (bus_space_map(sc->sc_iot, sc->sc_apb_addr, sc->sc_apb_size, mapflags, &sc->sc_ioh) != 0 || 233 bus_space_map(sc->sc_iot, sc->sc_axi_addr, sc->sc_axi_size, mapflags, &sc->sc_axi_ioh) != 0) { 234 printf(": can't map registers\n"); 235 sc->sc_axi_size = 0; 236 sc->sc_apb_size = 0; 237 return; 238 } 239 240 aprint_naive("\n"); 241 aprint_normal(": RK3399 PCIe\n"); 242 243 struct fdtbus_regulator *regulator; 244 regulator = fdtbus_regulator_acquire(phandle, "vpcie3v3-supply"); 245 if (regulator != NULL) { 246 fdtbus_regulator_enable(regulator); 247 fdtbus_regulator_release(regulator); 248 } 249 250 fdtbus_clock_assign(phandle); 251 clock_enable_all(phandle); 252 253 ep_gpio = fdtbus_gpio_acquire(phandle, "ep-gpios", GPIO_PIN_OUTPUT); 254 255 if (of_getprop_uint32(phandle, "max-link-speed", &max_link_speed) != 0) 256 max_link_speed = 2; 257 if (of_getprop_uint32(phandle, "num-lanes", &num_lanes) != 0) 258 num_lanes = 1; 259 260 again: 261 fdtbus_gpio_write(ep_gpio, 0); 262 263 reset_assert(phandle, "aclk"); 264 reset_assert(phandle, "pclk"); 265 reset_assert(phandle, "pm"); 266 267 memset(phy, 0, sizeof(phy)); 268 phy[0] = fdtbus_phy_get(phandle, "pcie-phy-0"); 269 if (phy[0] == NULL) { 270 phy[0] = fdtbus_phy_get(phandle, "pcie-phy"); 271 } else { 272 phy[1] = fdtbus_phy_get(phandle, "pcie-phy-1"); 273 phy[2] = fdtbus_phy_get(phandle, "pcie-phy-2"); 274 phy[3] = fdtbus_phy_get(phandle, "pcie-phy-3"); 275 } 276 277 reset_assert(phandle, "core"); 278 reset_assert(phandle, "mgmt"); 279 reset_assert(phandle, "mgmt-sticky"); 280 reset_assert(phandle, "pipe"); 281 282 delay(1000); /* TPERST. use 1ms */ 283 284 reset_deassert(phandle, "pm"); 285 reset_deassert(phandle, "aclk"); 286 reset_deassert(phandle, "pclk"); 287 288 if (max_link_speed == 1) 289 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCBSC_PGS_GEN1); 290 else 291 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCBSC_PGS_GEN2); 292 293 /* Switch into Root Complex mode. */ 294 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, 295 PCBSC_MS_ROOTPORT | PCBSC_CONF_EN | PCBSC_LC(num_lanes)); 296 297 if (phy[3] && fdtbus_phy_enable(phy[3], true) != 0) { 298 aprint_error(": couldn't enable phy3\n"); 299 } 300 if (phy[2] && fdtbus_phy_enable(phy[2], true) != 0) { 301 aprint_error(": couldn't enable phy2\n"); 302 } 303 if (phy[1] && fdtbus_phy_enable(phy[1], true) != 0) { 304 aprint_error(": couldn't enable phy1\n"); 305 } 306 if (phy[0] && fdtbus_phy_enable(phy[0], true) != 0) { 307 aprint_error(": couldn't enable phy0\n"); 308 } 309 310 reset_deassert(phandle, "mgmt-sticky"); 311 reset_deassert(phandle, "core"); 312 reset_deassert(phandle, "mgmt"); 313 reset_deassert(phandle, "pipe"); 314 315 fdtbus_gpio_write(ep_gpio, 1); 316 delay(20000); /* 20 ms according to PCI-e BS "Conventional Reset" */ 317 318 /* Start link training. */ 319 HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCBSC_LINK_TRAIN_EN); 320 321 for (timo = 500; timo > 0; timo--) { 322 status = HREAD4(sc, PCIE_CLIENT_BASIC_STATUS1); 323 if (PCBS1_LINK_ST(status) == PCBS1_LS_DL_DONE) 324 break; 325 delay(1000); 326 } 327 if (timo == 0) { 328 device_printf(self, "link training timeout (link_st %u)\n", 329 PCBS1_LINK_ST(status)); 330 if (max_link_speed > 1) { 331 --max_link_speed; 332 goto again; 333 } 334 return; 335 } 336 337 if (max_link_speed == 2) { 338 HWRITE4(sc, PCIE_RC_CONFIG_LCSR, HREAD4(sc, PCIE_RC_CONFIG_LCSR) | PCIE_LCSR_RETRAIN); 339 for (timo = 500; timo > 0; timo--) { 340 status = HREAD4(sc, PCIE_LM_CORE_CTRL); 341 if ((status & PCIE_CORE_PL_CONF_SPEED_MASK) == PCIE_CORE_PL_CONF_SPEED_5G) 342 break; 343 delay(1000); 344 } 345 if (timo == 0) { 346 device_printf(self, "Gen2 link training timeout\n"); 347 --max_link_speed; 348 goto again; 349 } 350 } 351 delay(80000); /* wait 100 ms before CSR access. already waited 20. */ 352 353 fdtbus_gpio_release(ep_gpio); 354 355 HWRITE4(sc, PCIE_RC_BASE + PCI_CLASS_REG, 356 PCI_CLASS_BRIDGE << PCI_CLASS_SHIFT | 357 PCI_SUBCLASS_BRIDGE_PCI << PCI_SUBCLASS_SHIFT); 358 359 /* Initialize Root Complex registers. */ 360 HWRITE4(sc, PCIE_LM_VENDOR_ID, PCI_VENDOR_ROCKCHIP); 361 HWRITE4(sc, PCIE_RC_BASE + PCI_CLASS_REG, 362 PCI_CLASS_BRIDGE << PCI_CLASS_SHIFT | 363 PCI_SUBCLASS_BRIDGE_PCI << PCI_SUBCLASS_SHIFT); 364 HWRITE4(sc, PCIE_LM_RCBAR, PCIE_LM_RCBARPIE | PCIE_LM_RCBARPIS); 365 366 /* remove L1 substate cap */ 367 status = HREAD4(sc, PCIE_RC_CONFIG_THP_CAP); 368 status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK; 369 HWRITE4(sc, PCIE_RC_CONFIG_THP_CAP, status); 370 371 if (of_hasprop(phandle, "aspm-no-l0s")) { 372 status = HREAD4(sc, PCIE_RC_PCIE_LCAP); 373 status &= ~__SHIFTIN(1, PCIE_LCAP_ASPM); 374 HWRITE4(sc, PCIE_RC_PCIE_LCAP, status); 375 } 376 377 /* Default bus ranges */ 378 sc->sc_phsc.sc_bus_min = 0; 379 sc->sc_phsc.sc_bus_max = 31; 380 381 /* Override bus range from DT */ 382 bus_range = fdtbus_get_prop(phandle, "bus-range", &len); 383 if (len == 8) { 384 sc->sc_phsc.sc_bus_min = be32dec(&bus_range[0]); 385 sc->sc_phsc.sc_bus_max = be32dec(&bus_range[1]); 386 } 387 388 if (sc->sc_phsc.sc_bus_min != 0) { 389 aprint_error_dev(self, "bus-range doesn't start at 0\n"); 390 return; 391 } 392 393 /* Configure Address Translation. */ 394 rkpcie_atr_init(sc); 395 396 fdtbus_register_interrupt_controller(self, OF_child(sc->sc_phsc.sc_phandle), 397 &rkpcie_intrfuncs); 398 399 sc->sc_phsc.sc_type = PCIHOST_ECAM; 400 sc->sc_phsc.sc_pci_flags |= PCI_FLAGS_MSI_OKAY; 401 sc->sc_phsc.sc_pci_flags |= PCI_FLAGS_MSIX_OKAY; 402 pcihost_init(&sc->sc_phsc.sc_pc, sc); 403 sc->sc_phsc.sc_pc.pc_bus_maxdevs = rkpcie_bus_maxdevs; 404 sc->sc_phsc.sc_pc.pc_make_tag = rkpcie_make_tag; 405 sc->sc_phsc.sc_pc.pc_decompose_tag = rkpcie_decompose_tag; 406 sc->sc_phsc.sc_pc.pc_conf_read = rkpcie_conf_read; 407 sc->sc_phsc.sc_pc.pc_conf_write = rkpcie_conf_write; 408 sc->sc_phsc.sc_pc.pc_conf_hook = rkpcie_conf_hook; 409 410 mutex_init(&sc->sc_conf_lock, MUTEX_DEFAULT, IPL_HIGH); 411 pcihost_init2(&sc->sc_phsc); 412 } 413 414 static void 415 rkpcie_atr_init(struct rkpcie_softc *sc) 416 { 417 const u_int *ranges; 418 bus_addr_t aaddr; 419 bus_addr_t addr; 420 bus_size_t size, resid, offset; 421 uint32_t type; 422 int region, i, ranges_len; 423 424 /* Use region 0 to map PCI configuration space */ 425 HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 20 - 1); 426 HWRITE4(sc, PCIE_ATR_OB_ADDR1(0), 0); 427 HWRITE4(sc, PCIE_ATR_OB_DESC0(0), PCIE_ATR_HDR_CFG_TYPE0 | PCIE_ATR_HDR_RID); 428 HWRITE4(sc, PCIE_ATR_OB_DESC1(0), 0); 429 430 ranges = fdtbus_get_prop(sc->sc_phsc.sc_phandle, "ranges", &ranges_len); 431 if (ranges == NULL) 432 goto fail; 433 const int ranges_cells = ranges_len / 4; 434 435 for (i = 0; i < ranges_cells; i += 7) { 436 /* Handle IO and MMIO. */ 437 switch (be32toh(ranges[i]) & 0x03000000) { 438 case 0x01000000: 439 type = PCIE_ATR_HDR_IO; 440 break; 441 case 0x02000000: 442 case 0x03000000: 443 type = PCIE_ATR_HDR_MEM; 444 break; 445 default: 446 continue; 447 } 448 449 addr = ((uint64_t)be32toh(ranges[i + 1]) << 32) + be32toh(ranges[i + 2]); 450 aaddr = ((uint64_t)be32toh(ranges[i + 3]) << 32) + be32toh(ranges[i + 4]); 451 size = be32toh(ranges[i + 6]); 452 453 /* Only support mappings aligned on a region boundary. */ 454 if (addr & (PCIE_ATR_OB_REGION_SIZE - 1)) 455 goto fail; 456 if (aaddr & (PCIE_ATR_OB_REGION_SIZE - 1)) 457 goto fail; 458 if (size & (PCIE_ATR_OB_REGION_SIZE - 1)) 459 goto fail; 460 461 /* Mappings should lie in AXI region. */ 462 if (aaddr < sc->sc_axi_addr) 463 goto fail; 464 if (aaddr + size > sc->sc_axi_addr + 64*1024*1024) 465 goto fail; 466 467 offset = addr - sc->sc_axi_addr - PCIE_ATR_OB_REGION0_SIZE; 468 region = 1 + (offset / PCIE_ATR_OB_REGION_SIZE); 469 resid = size; 470 while (resid > 0) { 471 HWRITE4(sc, PCIE_ATR_OB_ADDR0(region), 32 - 1); 472 HWRITE4(sc, PCIE_ATR_OB_ADDR1(region), 0); 473 HWRITE4(sc, PCIE_ATR_OB_DESC0(region), type | PCIE_ATR_HDR_RID); 474 HWRITE4(sc, PCIE_ATR_OB_DESC1(region), 0); 475 476 addr += PCIE_ATR_OB_REGION_SIZE; 477 resid -= PCIE_ATR_OB_REGION_SIZE; 478 region++; 479 } 480 } 481 482 /* Passthrought inbound translations unmodified. */ 483 HWRITE4(sc, PCIE_ATR_IB_ADDR0(2), 32 - 1); 484 HWRITE4(sc, PCIE_ATR_IB_ADDR1(2), 0); 485 486 return; 487 488 fail: 489 device_printf(sc->sc_phsc.sc_dev, "can't map ranges\n"); 490 } 491 492 int 493 rkpcie_bus_maxdevs(void *v, int bus) 494 { 495 struct rkpcie_softc *rksc = v; 496 struct pcihost_softc *sc = &rksc->sc_phsc; 497 498 if (bus == sc->sc_bus_min || bus == sc->sc_bus_min + 1) 499 return 1; 500 return 32; 501 } 502 503 pcitag_t 504 rkpcie_make_tag(void *v, int bus, int device, int function) 505 { 506 /* Return ECAM address. */ 507 return ((bus << 20) | (device << 15) | (function << 12)); 508 } 509 510 void 511 rkpcie_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 512 { 513 if (bp != NULL) 514 *bp = (tag >> 20) & 0xff; 515 if (dp != NULL) 516 *dp = (tag >> 15) & 0x1f; 517 if (fp != NULL) 518 *fp = (tag >> 12) & 0x7; 519 } 520 521 /* Only one device on root port and the first subordinate port. */ 522 static bool 523 rkpcie_conf_ok(int bus, int dev, int fn, int offset, struct rkpcie_softc *sc) 524 { 525 int bus_min = sc->sc_phsc.sc_bus_min; 526 527 if ((unsigned int)offset >= (1<<12)) 528 return false; 529 /* first two buses use type 0 cfg which doesn't use bus/device numbers */ 530 if (dev != 0 && (bus == bus_min || bus == bus_min + 1)) 531 return false; 532 return true; 533 } 534 535 pcireg_t 536 rkpcie_conf_read(void *v, pcitag_t tag, int offset) 537 { 538 struct rkpcie_softc *sc = v; 539 int bus_min = sc->sc_phsc.sc_bus_min; 540 int bus, dev, fn; 541 u_int reg; 542 int32_t val; 543 544 KASSERT(offset >= 0); 545 KASSERT(offset < PCI_EXTCONF_SIZE); 546 547 rkpcie_decompose_tag(sc, tag, &bus, &dev, &fn); 548 if (!rkpcie_conf_ok(bus, dev, fn, offset, sc)) 549 return 0xffffffff; 550 reg = (dev << 15) | (fn << 12) | offset; 551 552 if (bus == bus_min) 553 val = HREAD4(sc, PCIE_RC_NORMAL_BASE + reg); 554 else { 555 mutex_spin_enter(&sc->sc_conf_lock); 556 HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 557 (bus << 20) | (20 - 1)); 558 HWRITE4(sc, PCIE_ATR_OB_DESC0(0), 559 PCIE_ATR_HDR_RID | ((bus == bus_min + 1) 560 ? PCIE_ATR_HDR_CFG_TYPE0 : PCIE_ATR_HDR_CFG_TYPE1)); 561 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_apb_size, 562 BUS_SPACE_BARRIER_READ); 563 if (AXIPEEK4(sc, reg, &val) != 0) 564 val = 0xffffffff; 565 bus_space_barrier(sc->sc_iot, sc->sc_axi_ioh, 566 0, sc->sc_axi_size, 567 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 568 mutex_spin_exit(&sc->sc_conf_lock); 569 } 570 return val; 571 } 572 573 void 574 rkpcie_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data) 575 { 576 struct rkpcie_softc *sc = v; 577 int bus_min = sc->sc_phsc.sc_bus_min; 578 int bus, dev, fn; 579 u_int reg; 580 581 KASSERT(offset >= 0); 582 KASSERT(offset < PCI_EXTCONF_SIZE); 583 584 rkpcie_decompose_tag(sc, tag, &bus, &dev, &fn); 585 if (!rkpcie_conf_ok(bus, dev, fn, offset, sc)) 586 return; 587 reg = (dev << 15) | (fn << 12) | offset; 588 589 if (bus == bus_min) 590 HWRITE4(sc, PCIE_RC_NORMAL_BASE + reg, data); 591 else { 592 mutex_spin_enter(&sc->sc_conf_lock); 593 HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 594 (bus << 20) | (20 - 1)); 595 HWRITE4(sc, PCIE_ATR_OB_DESC0(0), 596 PCIE_ATR_HDR_RID | ((bus == bus_min + 1) 597 ? PCIE_ATR_HDR_CFG_TYPE0 : PCIE_ATR_HDR_CFG_TYPE1)); 598 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_apb_size, 599 BUS_SPACE_BARRIER_WRITE); 600 AXIPOKE4(sc, reg, data); 601 bus_space_barrier(sc->sc_iot, sc->sc_axi_ioh, 602 0, sc->sc_axi_size, 603 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 604 mutex_spin_exit(&sc->sc_conf_lock); 605 } 606 } 607 608 static int 609 rkpcie_conf_hook(void *v, int b, int d, int f, pcireg_t id) 610 { 611 return (PCI_CONF_DEFAULT & ~PCI_CONF_ENABLE_BM) | PCI_CONF_MAP_ROM; 612 } 613 614 /* INTx interrupt controller */ 615 static void * 616 rkpcie_intx_establish(device_t dev, u_int *specifier, int ipl, int flags, 617 int (*func)(void *), void *arg, const char *xname) 618 { 619 struct rkpcie_softc *sc = device_private(dev); 620 void *cookie; 621 622 #if notyet 623 const u_int pin = be32toh(specifier[0]); 624 #endif 625 626 /* Unmask legacy interrupts. */ 627 HWRITE4(sc, PCIE_CLIENT_INT_MASK, 628 PCIM_INTx_ENAB(0) | PCIM_INTx_ENAB(1) | 629 PCIM_INTx_ENAB(2) | PCIM_INTx_ENAB(3)); 630 631 cookie = fdtbus_intr_establish_byname(sc->sc_phsc.sc_phandle, 632 "legacy", ipl, flags, func, arg); 633 634 return cookie; 635 } 636 637 static void 638 rkpcie_intx_disestablish(device_t dev, void *ih) 639 { 640 struct rkpcie_softc *sc = device_private(dev); 641 device_printf(dev, "%s\n", __func__); 642 fdtbus_intr_disestablish(sc->sc_phsc.sc_phandle, ih); 643 } 644 645 static bool 646 rkpcie_intx_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen) 647 { 648 struct rkpcie_softc *sc = device_private(dev); 649 650 fdtbus_intr_str(sc->sc_phsc.sc_phandle, 1, buf, buflen); 651 652 return true; 653 } 654 655 static struct fdtbus_interrupt_controller_func rkpcie_intrfuncs = { 656 .establish = rkpcie_intx_establish, 657 .disestablish = rkpcie_intx_disestablish, 658 .intrstr = rkpcie_intx_intrstr, 659 }; 660
Indexes created Thu Oct 02 10:09:58 GMT 2025