Hou Zhiqiang | b89e3d9 | 2019-04-24 22:33:02 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ OR X11 |
| 2 | /* |
| 3 | * Copyright 2019 NXP |
| 4 | * |
| 5 | * PCIe DM U-Boot driver for Freescale PowerPC SoCs |
| 6 | * Author: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> |
| 7 | */ |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <dm.h> |
| 11 | #include <malloc.h> |
| 12 | #include <mapmem.h> |
| 13 | #include <pci.h> |
| 14 | #include <asm/fsl_pci.h> |
| 15 | #include <asm/fsl_serdes.h> |
| 16 | #include <asm/io.h> |
| 17 | #include "pcie_fsl.h" |
| 18 | |
| 19 | LIST_HEAD(fsl_pcie_list); |
| 20 | |
| 21 | static int fsl_pcie_link_up(struct fsl_pcie *pcie); |
| 22 | |
| 23 | static int fsl_pcie_addr_valid(struct fsl_pcie *pcie, pci_dev_t bdf) |
| 24 | { |
| 25 | struct udevice *bus = pcie->bus; |
| 26 | |
| 27 | if (!pcie->enabled) |
| 28 | return -ENXIO; |
| 29 | |
| 30 | if (PCI_BUS(bdf) < bus->seq) |
| 31 | return -EINVAL; |
| 32 | |
| 33 | if (PCI_BUS(bdf) > bus->seq && (!fsl_pcie_link_up(pcie) || pcie->mode)) |
| 34 | return -EINVAL; |
| 35 | |
| 36 | if (PCI_BUS(bdf) == bus->seq && (PCI_DEV(bdf) > 0 || PCI_FUNC(bdf) > 0)) |
| 37 | return -EINVAL; |
| 38 | |
| 39 | if (PCI_BUS(bdf) == (bus->seq + 1) && (PCI_DEV(bdf) > 0)) |
| 40 | return -EINVAL; |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int fsl_pcie_read_config(struct udevice *bus, pci_dev_t bdf, |
| 46 | uint offset, ulong *valuep, |
| 47 | enum pci_size_t size) |
| 48 | { |
| 49 | struct fsl_pcie *pcie = dev_get_priv(bus); |
| 50 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 51 | u32 val; |
| 52 | |
| 53 | if (fsl_pcie_addr_valid(pcie, bdf)) { |
| 54 | *valuep = pci_get_ff(size); |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | bdf = bdf - PCI_BDF(bus->seq, 0, 0); |
| 59 | val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; |
| 60 | out_be32(®s->cfg_addr, val); |
| 61 | |
| 62 | sync(); |
| 63 | |
| 64 | switch (size) { |
| 65 | case PCI_SIZE_8: |
| 66 | *valuep = in_8((u8 *)®s->cfg_data + (offset & 3)); |
| 67 | break; |
| 68 | case PCI_SIZE_16: |
| 69 | *valuep = in_le16((u16 *)((u8 *)®s->cfg_data + |
| 70 | (offset & 2))); |
| 71 | break; |
| 72 | case PCI_SIZE_32: |
| 73 | *valuep = in_le32(®s->cfg_data); |
| 74 | break; |
| 75 | } |
| 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static int fsl_pcie_write_config(struct udevice *bus, pci_dev_t bdf, |
| 81 | uint offset, ulong value, |
| 82 | enum pci_size_t size) |
| 83 | { |
| 84 | struct fsl_pcie *pcie = dev_get_priv(bus); |
| 85 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 86 | u32 val; |
| 87 | u8 val_8; |
| 88 | u16 val_16; |
| 89 | u32 val_32; |
| 90 | |
| 91 | if (fsl_pcie_addr_valid(pcie, bdf)) |
| 92 | return 0; |
| 93 | |
| 94 | bdf = bdf - PCI_BDF(bus->seq, 0, 0); |
| 95 | val = bdf | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; |
| 96 | out_be32(®s->cfg_addr, val); |
| 97 | |
| 98 | sync(); |
| 99 | |
| 100 | switch (size) { |
| 101 | case PCI_SIZE_8: |
| 102 | val_8 = value; |
| 103 | out_8((u8 *)®s->cfg_data + (offset & 3), val_8); |
| 104 | break; |
| 105 | case PCI_SIZE_16: |
| 106 | val_16 = value; |
| 107 | out_le16((u16 *)((u8 *)®s->cfg_data + (offset & 2)), val_16); |
| 108 | break; |
| 109 | case PCI_SIZE_32: |
| 110 | val_32 = value; |
| 111 | out_le32(®s->cfg_data, val_32); |
| 112 | break; |
| 113 | } |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static int fsl_pcie_hose_read_config(struct fsl_pcie *pcie, uint offset, |
| 119 | ulong *valuep, enum pci_size_t size) |
| 120 | { |
| 121 | int ret; |
| 122 | struct udevice *bus = pcie->bus; |
| 123 | |
| 124 | ret = fsl_pcie_read_config(bus, PCI_BDF(bus->seq, 0, 0), |
| 125 | offset, valuep, size); |
| 126 | |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | static int fsl_pcie_hose_write_config(struct fsl_pcie *pcie, uint offset, |
| 131 | ulong value, enum pci_size_t size) |
| 132 | { |
| 133 | struct udevice *bus = pcie->bus; |
| 134 | |
| 135 | return fsl_pcie_write_config(bus, PCI_BDF(bus->seq, 0, 0), |
| 136 | offset, value, size); |
| 137 | } |
| 138 | |
| 139 | static int fsl_pcie_hose_read_config_byte(struct fsl_pcie *pcie, uint offset, |
| 140 | u8 *valuep) |
| 141 | { |
| 142 | ulong val; |
| 143 | int ret; |
| 144 | |
| 145 | ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_8); |
| 146 | *valuep = val; |
| 147 | |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | static int fsl_pcie_hose_read_config_word(struct fsl_pcie *pcie, uint offset, |
| 152 | u16 *valuep) |
| 153 | { |
| 154 | ulong val; |
| 155 | int ret; |
| 156 | |
| 157 | ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_16); |
| 158 | *valuep = val; |
| 159 | |
| 160 | return ret; |
| 161 | } |
| 162 | |
| 163 | static int fsl_pcie_hose_read_config_dword(struct fsl_pcie *pcie, uint offset, |
| 164 | u32 *valuep) |
| 165 | { |
| 166 | ulong val; |
| 167 | int ret; |
| 168 | |
| 169 | ret = fsl_pcie_hose_read_config(pcie, offset, &val, PCI_SIZE_32); |
| 170 | *valuep = val; |
| 171 | |
| 172 | return ret; |
| 173 | } |
| 174 | |
| 175 | static int fsl_pcie_hose_write_config_byte(struct fsl_pcie *pcie, uint offset, |
| 176 | u8 value) |
| 177 | { |
| 178 | return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_8); |
| 179 | } |
| 180 | |
| 181 | static int fsl_pcie_hose_write_config_word(struct fsl_pcie *pcie, uint offset, |
| 182 | u16 value) |
| 183 | { |
| 184 | return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_16); |
| 185 | } |
| 186 | |
| 187 | static int fsl_pcie_hose_write_config_dword(struct fsl_pcie *pcie, uint offset, |
| 188 | u32 value) |
| 189 | { |
| 190 | return fsl_pcie_hose_write_config(pcie, offset, value, PCI_SIZE_32); |
| 191 | } |
| 192 | |
| 193 | static int fsl_pcie_link_up(struct fsl_pcie *pcie) |
| 194 | { |
| 195 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 196 | u16 ltssm; |
| 197 | |
| 198 | if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) { |
| 199 | ltssm = (in_be32(®s->pex_csr0) |
| 200 | & PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT; |
| 201 | return ltssm == LTSSM_L0_REV3; |
| 202 | } |
| 203 | |
| 204 | fsl_pcie_hose_read_config_word(pcie, PCI_LTSSM, <ssm); |
| 205 | |
| 206 | return ltssm == LTSSM_L0; |
| 207 | } |
| 208 | |
| 209 | static bool fsl_pcie_is_agent(struct fsl_pcie *pcie) |
| 210 | { |
| 211 | u8 header_type; |
| 212 | |
| 213 | fsl_pcie_hose_read_config_byte(pcie, PCI_HEADER_TYPE, &header_type); |
| 214 | |
| 215 | return (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL; |
| 216 | } |
| 217 | |
| 218 | static int fsl_pcie_setup_law(struct fsl_pcie *pcie) |
| 219 | { |
| 220 | struct pci_region *io, *mem, *pref; |
| 221 | |
| 222 | pci_get_regions(pcie->bus, &io, &mem, &pref); |
| 223 | |
| 224 | if (mem) |
| 225 | set_next_law(mem->phys_start, |
| 226 | law_size_bits(mem->size), |
| 227 | pcie->law_trgt_if); |
| 228 | |
| 229 | if (io) |
| 230 | set_next_law(io->phys_start, |
| 231 | law_size_bits(io->size), |
| 232 | pcie->law_trgt_if); |
| 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static void fsl_pcie_config_ready(struct fsl_pcie *pcie) |
| 238 | { |
| 239 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 240 | |
| 241 | if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) { |
| 242 | setbits_be32(®s->config, FSL_PCIE_V3_CFG_RDY); |
| 243 | return; |
| 244 | } |
| 245 | |
| 246 | fsl_pcie_hose_write_config_byte(pcie, FSL_PCIE_CFG_RDY, 0x1); |
| 247 | } |
| 248 | |
| 249 | static int fsl_pcie_setup_outbound_win(struct fsl_pcie *pcie, int idx, |
| 250 | int type, u64 phys, u64 bus_addr, |
| 251 | pci_size_t size) |
| 252 | { |
| 253 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 254 | pot_t *po = ®s->pot[idx]; |
| 255 | u32 war, sz; |
| 256 | |
| 257 | if (idx < 0) |
| 258 | return -EINVAL; |
| 259 | |
| 260 | out_be32(&po->powbar, phys >> 12); |
| 261 | out_be32(&po->potar, bus_addr >> 12); |
| 262 | #ifdef CONFIG_SYS_PCI_64BIT |
| 263 | out_be32(&po->potear, bus_addr >> 44); |
| 264 | #else |
| 265 | out_be32(&po->potear, 0); |
| 266 | #endif |
| 267 | |
| 268 | sz = (__ilog2_u64((u64)size) - 1); |
| 269 | war = POWAR_EN | sz; |
| 270 | |
| 271 | if (type == PCI_REGION_IO) |
| 272 | war |= POWAR_IO_READ | POWAR_IO_WRITE; |
| 273 | else |
| 274 | war |= POWAR_MEM_READ | POWAR_MEM_WRITE; |
| 275 | |
| 276 | out_be32(&po->powar, war); |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | static int fsl_pcie_setup_inbound_win(struct fsl_pcie *pcie, int idx, |
| 282 | bool pf, u64 phys, u64 bus_addr, |
| 283 | pci_size_t size) |
| 284 | { |
| 285 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 286 | pit_t *pi = ®s->pit[idx]; |
| 287 | u32 sz = (__ilog2_u64(size) - 1); |
| 288 | u32 flag = PIWAR_LOCAL; |
| 289 | |
| 290 | if (idx < 0) |
| 291 | return -EINVAL; |
| 292 | |
| 293 | out_be32(&pi->pitar, phys >> 12); |
| 294 | out_be32(&pi->piwbar, bus_addr >> 12); |
| 295 | |
| 296 | #ifdef CONFIG_SYS_PCI_64BIT |
| 297 | out_be32(&pi->piwbear, bus_addr >> 44); |
| 298 | #else |
| 299 | out_be32(&pi->piwbear, 0); |
| 300 | #endif |
| 301 | |
| 302 | if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A005434)) |
| 303 | flag = 0; |
| 304 | |
| 305 | flag |= PIWAR_EN | PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP; |
| 306 | if (pf) |
| 307 | flag |= PIWAR_PF; |
| 308 | out_be32(&pi->piwar, flag | sz); |
| 309 | |
| 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | static int fsl_pcie_setup_outbound_wins(struct fsl_pcie *pcie) |
| 314 | { |
| 315 | struct pci_region *io, *mem, *pref; |
| 316 | int idx = 1; /* skip 0 */ |
| 317 | |
| 318 | pci_get_regions(pcie->bus, &io, &mem, &pref); |
| 319 | |
| 320 | if (io) |
| 321 | /* ATU : OUTBOUND : IO */ |
| 322 | fsl_pcie_setup_outbound_win(pcie, idx++, |
| 323 | PCI_REGION_IO, |
| 324 | io->phys_start, |
| 325 | io->bus_start, |
| 326 | io->size); |
| 327 | |
| 328 | if (mem) |
| 329 | /* ATU : OUTBOUND : MEM */ |
| 330 | fsl_pcie_setup_outbound_win(pcie, idx++, |
| 331 | PCI_REGION_MEM, |
| 332 | mem->phys_start, |
| 333 | mem->bus_start, |
| 334 | mem->size); |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int fsl_pcie_setup_inbound_wins(struct fsl_pcie *pcie) |
| 339 | { |
| 340 | phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS; |
| 341 | pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS; |
| 342 | u64 sz = min((u64)gd->ram_size, (1ull << 32)); |
| 343 | pci_size_t pci_sz; |
| 344 | int idx; |
| 345 | |
| 346 | if (pcie->block_rev >= PEX_IP_BLK_REV_2_2) |
| 347 | idx = 2; |
| 348 | else |
| 349 | idx = 3; |
| 350 | |
| 351 | pci_sz = 1ull << __ilog2_u64(sz); |
| 352 | |
| 353 | dev_dbg(pcie->bus, "R0 bus_start: %llx phys_start: %llx size: %llx\n", |
| 354 | (u64)bus_start, (u64)phys_start, (u64)sz); |
| 355 | |
| 356 | /* if we aren't an exact power of two match, pci_sz is smaller |
| 357 | * round it up to the next power of two. We report the actual |
| 358 | * size to pci region tracking. |
| 359 | */ |
| 360 | if (pci_sz != sz) |
| 361 | sz = 2ull << __ilog2_u64(sz); |
| 362 | |
| 363 | fsl_pcie_setup_inbound_win(pcie, idx--, true, |
| 364 | CONFIG_SYS_PCI_MEMORY_PHYS, |
| 365 | CONFIG_SYS_PCI_MEMORY_BUS, sz); |
| 366 | #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT) |
| 367 | /* |
| 368 | * On 64-bit capable systems, set up a mapping for all of DRAM |
| 369 | * in high pci address space. |
| 370 | */ |
| 371 | pci_sz = 1ull << __ilog2_u64(gd->ram_size); |
| 372 | /* round up to the next largest power of two */ |
| 373 | if (gd->ram_size > pci_sz) |
| 374 | pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1); |
| 375 | |
| 376 | dev_dbg(pcie->bus, "R64 bus_start: %llx phys_start: %llx size: %llx\n", |
| 377 | (u64)CONFIG_SYS_PCI64_MEMORY_BUS, |
| 378 | (u64)CONFIG_SYS_PCI_MEMORY_PHYS, (u64)pci_sz); |
| 379 | |
| 380 | fsl_pcie_setup_inbound_win(pcie, idx--, true, |
| 381 | CONFIG_SYS_PCI_MEMORY_PHYS, |
| 382 | CONFIG_SYS_PCI64_MEMORY_BUS, pci_sz); |
| 383 | #endif |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int fsl_pcie_init_atmu(struct fsl_pcie *pcie) |
| 389 | { |
| 390 | fsl_pcie_setup_outbound_wins(pcie); |
| 391 | fsl_pcie_setup_inbound_wins(pcie); |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static int fsl_pcie_init_port(struct fsl_pcie *pcie) |
| 397 | { |
| 398 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 399 | u32 val_32; |
| 400 | u16 val_16; |
| 401 | |
| 402 | fsl_pcie_init_atmu(pcie); |
| 403 | |
| 404 | if (IS_ENABLED(CONFIG_FSL_PCIE_DISABLE_ASPM)) { |
| 405 | val_32 = 0; |
| 406 | fsl_pcie_hose_read_config_dword(pcie, PCI_LCR, &val_32); |
| 407 | val_32 &= ~0x03; |
| 408 | fsl_pcie_hose_write_config_dword(pcie, PCI_LCR, val_32); |
| 409 | udelay(1); |
| 410 | } |
| 411 | |
| 412 | if (IS_ENABLED(CONFIG_FSL_PCIE_RESET)) { |
| 413 | u16 ltssm; |
| 414 | int i; |
| 415 | |
| 416 | if (pcie->block_rev >= PEX_IP_BLK_REV_3_0) { |
| 417 | /* assert PCIe reset */ |
| 418 | setbits_be32(®s->pdb_stat, 0x08000000); |
| 419 | (void)in_be32(®s->pdb_stat); |
| 420 | udelay(1000); |
| 421 | /* clear PCIe reset */ |
| 422 | clrbits_be32(®s->pdb_stat, 0x08000000); |
| 423 | asm("sync;isync"); |
| 424 | for (i = 0; i < 100 && !fsl_pcie_link_up(pcie); i++) |
| 425 | udelay(1000); |
| 426 | } else { |
| 427 | fsl_pcie_hose_read_config_word(pcie, PCI_LTSSM, <ssm); |
| 428 | if (ltssm == 1) { |
| 429 | /* assert PCIe reset */ |
| 430 | setbits_be32(®s->pdb_stat, 0x08000000); |
| 431 | (void)in_be32(®s->pdb_stat); |
| 432 | udelay(100); |
| 433 | /* clear PCIe reset */ |
| 434 | clrbits_be32(®s->pdb_stat, 0x08000000); |
| 435 | asm("sync;isync"); |
| 436 | for (i = 0; i < 100 && |
| 437 | !fsl_pcie_link_up(pcie); i++) |
| 438 | udelay(1000); |
| 439 | } |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | if (IS_ENABLED(CONFIG_SYS_P4080_ERRATUM_PCIE_A003) && |
| 444 | !fsl_pcie_link_up(pcie)) { |
| 445 | serdes_corenet_t *srds_regs; |
| 446 | |
| 447 | srds_regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR; |
| 448 | val_32 = in_be32(&srds_regs->srdspccr0); |
| 449 | |
| 450 | if ((val_32 >> 28) == 3) { |
| 451 | int i; |
| 452 | |
| 453 | out_be32(&srds_regs->srdspccr0, 2 << 28); |
| 454 | setbits_be32(®s->pdb_stat, 0x08000000); |
| 455 | in_be32(®s->pdb_stat); |
| 456 | udelay(100); |
| 457 | clrbits_be32(®s->pdb_stat, 0x08000000); |
| 458 | asm("sync;isync"); |
| 459 | for (i = 0; i < 100 && !fsl_pcie_link_up(pcie); i++) |
| 460 | udelay(1000); |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * The Read-Only Write Enable bit defaults to 1 instead of 0. |
| 466 | * Set to 0 to protect the read-only registers. |
| 467 | */ |
| 468 | if (IS_ENABLED(CONFIG_SYS_FSL_ERRATUM_A007815)) |
| 469 | clrbits_be32(®s->dbi_ro_wr_en, 0x01); |
| 470 | |
| 471 | /* |
| 472 | * Enable All Error Interrupts except |
| 473 | * - Master abort (pci) |
| 474 | * - Master PERR (pci) |
| 475 | * - ICCA (PCIe) |
| 476 | */ |
| 477 | out_be32(®s->peer, ~0x20140); |
| 478 | |
| 479 | /* set URR, FER, NFER (but not CER) */ |
| 480 | fsl_pcie_hose_read_config_dword(pcie, PCI_DCR, &val_32); |
| 481 | val_32 |= 0xf000e; |
| 482 | fsl_pcie_hose_write_config_dword(pcie, PCI_DCR, val_32); |
| 483 | |
| 484 | /* Clear all error indications */ |
| 485 | out_be32(®s->pme_msg_det, 0xffffffff); |
| 486 | out_be32(®s->pme_msg_int_en, 0xffffffff); |
| 487 | out_be32(®s->pedr, 0xffffffff); |
| 488 | |
| 489 | fsl_pcie_hose_read_config_word(pcie, PCI_DSR, &val_16); |
| 490 | if (val_16) |
| 491 | fsl_pcie_hose_write_config_word(pcie, PCI_DSR, 0xffff); |
| 492 | |
| 493 | fsl_pcie_hose_read_config_word(pcie, PCI_SEC_STATUS, &val_16); |
| 494 | if (val_16) |
| 495 | fsl_pcie_hose_write_config_word(pcie, PCI_SEC_STATUS, 0xffff); |
| 496 | |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | static int fsl_pcie_fixup_classcode(struct fsl_pcie *pcie) |
| 501 | { |
| 502 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 503 | u32 val; |
| 504 | |
| 505 | setbits_be32(®s->dbi_ro_wr_en, 0x01); |
| 506 | fsl_pcie_hose_read_config_dword(pcie, PCI_CLASS_REVISION, &val); |
| 507 | val &= 0xff; |
| 508 | val |= PCI_CLASS_BRIDGE_PCI << 16; |
| 509 | fsl_pcie_hose_write_config_dword(pcie, PCI_CLASS_REVISION, val); |
| 510 | clrbits_be32(®s->dbi_ro_wr_en, 0x01); |
| 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | |
| 515 | static int fsl_pcie_init_rc(struct fsl_pcie *pcie) |
| 516 | { |
| 517 | return fsl_pcie_fixup_classcode(pcie); |
| 518 | } |
| 519 | |
| 520 | static int fsl_pcie_init_ep(struct fsl_pcie *pcie) |
| 521 | { |
| 522 | fsl_pcie_config_ready(pcie); |
| 523 | |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | static int fsl_pcie_probe(struct udevice *dev) |
| 528 | { |
| 529 | struct fsl_pcie *pcie = dev_get_priv(dev); |
| 530 | ccsr_fsl_pci_t *regs = pcie->regs; |
| 531 | u16 val_16; |
| 532 | |
| 533 | pcie->bus = dev; |
| 534 | pcie->block_rev = in_be32(®s->block_rev1); |
| 535 | |
| 536 | list_add(&pcie->list, &fsl_pcie_list); |
| 537 | pcie->enabled = is_serdes_configured(PCIE1 + pcie->idx); |
| 538 | if (!pcie->enabled) { |
| 539 | printf("PCIe%d: %s disabled\n", pcie->idx, dev->name); |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | fsl_pcie_setup_law(pcie); |
| 544 | |
| 545 | pcie->mode = fsl_pcie_is_agent(pcie); |
| 546 | |
| 547 | fsl_pcie_init_port(pcie); |
| 548 | |
| 549 | printf("PCIe%d: %s ", pcie->idx, dev->name); |
| 550 | |
| 551 | if (pcie->mode) { |
| 552 | printf("Endpoint"); |
| 553 | fsl_pcie_init_ep(pcie); |
| 554 | } else { |
| 555 | printf("Root Complex"); |
| 556 | fsl_pcie_init_rc(pcie); |
| 557 | } |
| 558 | |
| 559 | if (!fsl_pcie_link_up(pcie)) { |
| 560 | printf(": %s\n", pcie->mode ? "undetermined link" : "no link"); |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | fsl_pcie_hose_read_config_word(pcie, PCI_LSR, &val_16); |
| 565 | printf(": x%d gen%d\n", (val_16 & 0x3f0) >> 4, (val_16 & 0xf)); |
| 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | static int fsl_pcie_ofdata_to_platdata(struct udevice *dev) |
| 571 | { |
| 572 | struct fsl_pcie *pcie = dev_get_priv(dev); |
| 573 | int ret; |
| 574 | |
| 575 | pcie->regs = dev_remap_addr(dev); |
| 576 | if (!pcie->regs) { |
| 577 | pr_err("\"reg\" resource not found\n"); |
| 578 | return -EINVAL; |
| 579 | } |
| 580 | |
| 581 | ret = dev_read_u32(dev, "law_trgt_if", &pcie->law_trgt_if); |
| 582 | if (ret < 0) { |
| 583 | pr_err("\"law_trgt_if\" not found\n"); |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | pcie->idx = (dev_read_addr(dev) - 0xffe240000) / 0x10000; |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | static const struct dm_pci_ops fsl_pcie_ops = { |
| 593 | .read_config = fsl_pcie_read_config, |
| 594 | .write_config = fsl_pcie_write_config, |
| 595 | }; |
| 596 | |
| 597 | static const struct udevice_id fsl_pcie_ids[] = { |
| 598 | { .compatible = "fsl,pcie-t2080" }, |
| 599 | { } |
| 600 | }; |
| 601 | |
| 602 | U_BOOT_DRIVER(fsl_pcie) = { |
| 603 | .name = "fsl_pcie", |
| 604 | .id = UCLASS_PCI, |
| 605 | .of_match = fsl_pcie_ids, |
| 606 | .ops = &fsl_pcie_ops, |
| 607 | .ofdata_to_platdata = fsl_pcie_ofdata_to_platdata, |
| 608 | .probe = fsl_pcie_probe, |
| 609 | .priv_auto_alloc_size = sizeof(struct fsl_pcie), |
| 610 | }; |