1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * MediaTek PCIe host controller driver. 4 * 5 * Copyright (c) 2017 MediaTek Inc. 6 * Author: Ryder Lee <ryder.lee@mediatek.com> 7 * Honghui Zhang <honghui.zhang@mediatek.com> 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/delay.h> 12 #include <linux/iopoll.h> 13 #include <linux/irq.h> 14 #include <linux/irqchip/chained_irq.h> 15 #include <linux/irqdomain.h> 16 #include <linux/kernel.h> 17 #include <linux/mfd/syscon.h> 18 #include <linux/msi.h> 19 #include <linux/module.h> 20 #include <linux/of_address.h> 21 #include <linux/of_pci.h> 22 #include <linux/of_platform.h> 23 #include <linux/pci.h> 24 #include <linux/phy/phy.h> 25 #include <linux/platform_device.h> 26 #include <linux/pm_runtime.h> 27 #include <linux/regmap.h> 28 #include <linux/reset.h> 29 30 #include "../pci.h" 31 32 /* PCIe shared registers */ 33 #define PCIE_SYS_CFG 0x00 34 #define PCIE_INT_ENABLE 0x0c 35 #define PCIE_CFG_ADDR 0x20 36 #define PCIE_CFG_DATA 0x24 37 38 /* PCIe per port registers */ 39 #define PCIE_BAR0_SETUP 0x10 40 #define PCIE_CLASS 0x34 41 #define PCIE_LINK_STATUS 0x50 42 43 #define PCIE_PORT_INT_EN(x) BIT(20 + (x)) 44 #define PCIE_PORT_PERST(x) BIT(1 + (x)) 45 #define PCIE_PORT_LINKUP BIT(0) 46 #define PCIE_BAR_MAP_MAX GENMASK(31, 16) 47 48 #define PCIE_BAR_ENABLE BIT(0) 49 #define PCIE_REVISION_ID BIT(0) 50 #define PCIE_CLASS_CODE (0x60400 << 8) 51 #define PCIE_CONF_REG(regn) (((regn) & GENMASK(7, 2)) | \ 52 ((((regn) >> 8) & GENMASK(3, 0)) << 24)) 53 #define PCIE_CONF_FUN(fun) (((fun) << 8) & GENMASK(10, 8)) 54 #define PCIE_CONF_DEV(dev) (((dev) << 11) & GENMASK(15, 11)) 55 #define PCIE_CONF_BUS(bus) (((bus) << 16) & GENMASK(23, 16)) 56 #define PCIE_CONF_ADDR(regn, fun, dev, bus) \ 57 (PCIE_CONF_REG(regn) | PCIE_CONF_FUN(fun) | \ 58 PCIE_CONF_DEV(dev) | PCIE_CONF_BUS(bus)) 59 60 /* MediaTek specific configuration registers */ 61 #define PCIE_FTS_NUM 0x70c 62 #define PCIE_FTS_NUM_MASK GENMASK(15, 8) 63 #define PCIE_FTS_NUM_L0(x) ((x) & 0xff << 8) 64 65 #define PCIE_FC_CREDIT 0x73c 66 #define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16)) 67 #define PCIE_FC_CREDIT_VAL(x) ((x) << 16) 68 69 /* PCIe V2 share registers */ 70 #define PCIE_SYS_CFG_V2 0x0 71 #define PCIE_CSR_LTSSM_EN(x) BIT(0 + (x) * 8) 72 #define PCIE_CSR_ASPM_L1_EN(x) BIT(1 + (x) * 8) 73 74 /* PCIe V2 per-port registers */ 75 #define PCIE_MSI_VECTOR 0x0c0 76 77 #define PCIE_CONF_VEND_ID 0x100 78 #define PCIE_CONF_DEVICE_ID 0x102 79 #define PCIE_CONF_CLASS_ID 0x106 80 81 #define PCIE_INT_MASK 0x420 82 #define INTX_MASK GENMASK(19, 16) 83 #define INTX_SHIFT 16 84 #define PCIE_INT_STATUS 0x424 85 #define MSI_STATUS BIT(23) 86 #define PCIE_IMSI_STATUS 0x42c 87 #define PCIE_IMSI_ADDR 0x430 88 #define MSI_MASK BIT(23) 89 #define MTK_MSI_IRQS_NUM 32 90 91 #define PCIE_AHB_TRANS_BASE0_L 0x438 92 #define PCIE_AHB_TRANS_BASE0_H 0x43c 93 #define AHB2PCIE_SIZE(x) ((x) & GENMASK(4, 0)) 94 #define PCIE_AXI_WINDOW0 0x448 95 #define WIN_ENABLE BIT(7) 96 /* 97 * Define PCIe to AHB window size as 2^33 to support max 8GB address space 98 * translate, support least 4GB DRAM size access from EP DMA(physical DRAM 99 * start from 0x40000000). 100 */ 101 #define PCIE2AHB_SIZE 0x21 102 103 /* PCIe V2 configuration transaction header */ 104 #define PCIE_CFG_HEADER0 0x460 105 #define PCIE_CFG_HEADER1 0x464 106 #define PCIE_CFG_HEADER2 0x468 107 #define PCIE_CFG_WDATA 0x470 108 #define PCIE_APP_TLP_REQ 0x488 109 #define PCIE_CFG_RDATA 0x48c 110 #define APP_CFG_REQ BIT(0) 111 #define APP_CPL_STATUS GENMASK(7, 5) 112 113 #define CFG_WRRD_TYPE_0 4 114 #define CFG_WR_FMT 2 115 #define CFG_RD_FMT 0 116 117 #define CFG_DW0_LENGTH(length) ((length) & GENMASK(9, 0)) 118 #define CFG_DW0_TYPE(type) (((type) << 24) & GENMASK(28, 24)) 119 #define CFG_DW0_FMT(fmt) (((fmt) << 29) & GENMASK(31, 29)) 120 #define CFG_DW2_REGN(regn) ((regn) & GENMASK(11, 2)) 121 #define CFG_DW2_FUN(fun) (((fun) << 16) & GENMASK(18, 16)) 122 #define CFG_DW2_DEV(dev) (((dev) << 19) & GENMASK(23, 19)) 123 #define CFG_DW2_BUS(bus) (((bus) << 24) & GENMASK(31, 24)) 124 #define CFG_HEADER_DW0(type, fmt) \ 125 (CFG_DW0_LENGTH(1) | CFG_DW0_TYPE(type) | CFG_DW0_FMT(fmt)) 126 #define CFG_HEADER_DW1(where, size) \ 127 (GENMASK(((size) - 1), 0) << ((where) & 0x3)) 128 #define CFG_HEADER_DW2(regn, fun, dev, bus) \ 129 (CFG_DW2_REGN(regn) | CFG_DW2_FUN(fun) | \ 130 CFG_DW2_DEV(dev) | CFG_DW2_BUS(bus)) 131 132 #define PCIE_RST_CTRL 0x510 133 #define PCIE_PHY_RSTB BIT(0) 134 #define PCIE_PIPE_SRSTB BIT(1) 135 #define PCIE_MAC_SRSTB BIT(2) 136 #define PCIE_CRSTB BIT(3) 137 #define PCIE_PERSTB BIT(8) 138 #define PCIE_LINKDOWN_RST_EN GENMASK(15, 13) 139 #define PCIE_LINK_STATUS_V2 0x804 140 #define PCIE_PORT_LINKUP_V2 BIT(10) 141 142 struct mtk_pcie_port; 143 144 /** 145 * struct mtk_pcie_soc - differentiate between host generations 146 * @need_fix_class_id: whether this host's class ID needed to be fixed or not 147 * @need_fix_device_id: whether this host's device ID needed to be fixed or not 148 * @no_msi: Bridge has no MSI support, and relies on an external block 149 * @device_id: device ID which this host need to be fixed 150 * @ops: pointer to configuration access functions 151 * @startup: pointer to controller setting functions 152 * @setup_irq: pointer to initialize IRQ functions 153 */ 154 struct mtk_pcie_soc { 155 bool need_fix_class_id; 156 bool need_fix_device_id; 157 bool no_msi; 158 unsigned int device_id; 159 struct pci_ops *ops; 160 int (*startup)(struct mtk_pcie_port *port); 161 int (*setup_irq)(struct mtk_pcie_port *port, struct device_node *node); 162 }; 163 164 /** 165 * struct mtk_pcie_port - PCIe port information 166 * @base: IO mapped register base 167 * @list: port list 168 * @pcie: pointer to PCIe host info 169 * @reset: pointer to port reset control 170 * @sys_ck: pointer to transaction/data link layer clock 171 * @ahb_ck: pointer to AHB slave interface operating clock for CSR access 172 * and RC initiated MMIO access 173 * @axi_ck: pointer to application layer MMIO channel operating clock 174 * @aux_ck: pointer to pe2_mac_bridge and pe2_mac_core operating clock 175 * when pcie_mac_ck/pcie_pipe_ck is turned off 176 * @obff_ck: pointer to OBFF functional block operating clock 177 * @pipe_ck: pointer to LTSSM and PHY/MAC layer operating clock 178 * @phy: pointer to PHY control block 179 * @slot: port slot 180 * @irq: GIC irq 181 * @irq_domain: legacy INTx IRQ domain 182 * @inner_domain: inner IRQ domain 183 * @msi_domain: MSI IRQ domain 184 * @lock: protect the msi_irq_in_use bitmap 185 * @msi_irq_in_use: bit map for assigned MSI IRQ 186 */ 187 struct mtk_pcie_port { 188 void __iomem *base; 189 struct list_head list; 190 struct mtk_pcie *pcie; 191 struct reset_control *reset; 192 struct clk *sys_ck; 193 struct clk *ahb_ck; 194 struct clk *axi_ck; 195 struct clk *aux_ck; 196 struct clk *obff_ck; 197 struct clk *pipe_ck; 198 struct phy *phy; 199 u32 slot; 200 int irq; 201 struct irq_domain *irq_domain; 202 struct irq_domain *inner_domain; 203 struct irq_domain *msi_domain; 204 struct mutex lock; 205 DECLARE_BITMAP(msi_irq_in_use, MTK_MSI_IRQS_NUM); 206 }; 207 208 /** 209 * struct mtk_pcie - PCIe host information 210 * @dev: pointer to PCIe device 211 * @base: IO mapped register base 212 * @cfg: IO mapped register map for PCIe config 213 * @free_ck: free-run reference clock 214 * @mem: non-prefetchable memory resource 215 * @ports: pointer to PCIe port information 216 * @soc: pointer to SoC-dependent operations 217 */ 218 struct mtk_pcie { 219 struct device *dev; 220 void __iomem *base; 221 struct regmap *cfg; 222 struct clk *free_ck; 223 224 struct list_head ports; 225 const struct mtk_pcie_soc *soc; 226 }; 227 228 static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie) 229 { 230 struct device *dev = pcie->dev; 231 232 clk_disable_unprepare(pcie->free_ck); 233 234 pm_runtime_put_sync(dev); 235 pm_runtime_disable(dev); 236 } 237 238 static void mtk_pcie_port_free(struct mtk_pcie_port *port) 239 { 240 struct mtk_pcie *pcie = port->pcie; 241 struct device *dev = pcie->dev; 242 243 devm_iounmap(dev, port->base); 244 list_del(&port->list); 245 devm_kfree(dev, port); 246 } 247 248 static void mtk_pcie_put_resources(struct mtk_pcie *pcie) 249 { 250 struct mtk_pcie_port *port, *tmp; 251 252 list_for_each_entry_safe(port, tmp, &pcie->ports, list) { 253 phy_power_off(port->phy); 254 phy_exit(port->phy); 255 clk_disable_unprepare(port->pipe_ck); 256 clk_disable_unprepare(port->obff_ck); 257 clk_disable_unprepare(port->axi_ck); 258 clk_disable_unprepare(port->aux_ck); 259 clk_disable_unprepare(port->ahb_ck); 260 clk_disable_unprepare(port->sys_ck); 261 mtk_pcie_port_free(port); 262 } 263 264 mtk_pcie_subsys_powerdown(pcie); 265 } 266 267 static int mtk_pcie_check_cfg_cpld(struct mtk_pcie_port *port) 268 { 269 u32 val; 270 int err; 271 272 err = readl_poll_timeout_atomic(port->base + PCIE_APP_TLP_REQ, val, 273 !(val & APP_CFG_REQ), 10, 274 100 * USEC_PER_MSEC); 275 if (err) 276 return PCIBIOS_SET_FAILED; 277 278 if (readl(port->base + PCIE_APP_TLP_REQ) & APP_CPL_STATUS) 279 return PCIBIOS_SET_FAILED; 280 281 return PCIBIOS_SUCCESSFUL; 282 } 283 284 static int mtk_pcie_hw_rd_cfg(struct mtk_pcie_port *port, u32 bus, u32 devfn, 285 int where, int size, u32 *val) 286 { 287 u32 tmp; 288 289 /* Write PCIe configuration transaction header for Cfgrd */ 290 writel(CFG_HEADER_DW0(CFG_WRRD_TYPE_0, CFG_RD_FMT), 291 port->base + PCIE_CFG_HEADER0); 292 writel(CFG_HEADER_DW1(where, size), port->base + PCIE_CFG_HEADER1); 293 writel(CFG_HEADER_DW2(where, PCI_FUNC(devfn), PCI_SLOT(devfn), bus), 294 port->base + PCIE_CFG_HEADER2); 295 296 /* Trigger h/w to transmit Cfgrd TLP */ 297 tmp = readl(port->base + PCIE_APP_TLP_REQ); 298 tmp |= APP_CFG_REQ; 299 writel(tmp, port->base + PCIE_APP_TLP_REQ); 300 301 /* Check completion status */ 302 if (mtk_pcie_check_cfg_cpld(port)) 303 return PCIBIOS_SET_FAILED; 304 305 /* Read cpld payload of Cfgrd */ 306 *val = readl(port->base + PCIE_CFG_RDATA); 307 308 if (size == 1) 309 *val = (*val >> (8 * (where & 3))) & 0xff; 310 else if (size == 2) 311 *val = (*val >> (8 * (where & 3))) & 0xffff; 312 313 return PCIBIOS_SUCCESSFUL; 314 } 315 316 static int mtk_pcie_hw_wr_cfg(struct mtk_pcie_port *port, u32 bus, u32 devfn, 317 int where, int size, u32 val) 318 { 319 /* Write PCIe configuration transaction header for Cfgwr */ 320 writel(CFG_HEADER_DW0(CFG_WRRD_TYPE_0, CFG_WR_FMT), 321 port->base + PCIE_CFG_HEADER0); 322 writel(CFG_HEADER_DW1(where, size), port->base + PCIE_CFG_HEADER1); 323 writel(CFG_HEADER_DW2(where, PCI_FUNC(devfn), PCI_SLOT(devfn), bus), 324 port->base + PCIE_CFG_HEADER2); 325 326 /* Write Cfgwr data */ 327 val = val << 8 * (where & 3); 328 writel(val, port->base + PCIE_CFG_WDATA); 329 330 /* Trigger h/w to transmit Cfgwr TLP */ 331 val = readl(port->base + PCIE_APP_TLP_REQ); 332 val |= APP_CFG_REQ; 333 writel(val, port->base + PCIE_APP_TLP_REQ); 334 335 /* Check completion status */ 336 return mtk_pcie_check_cfg_cpld(port); 337 } 338 339 static struct mtk_pcie_port *mtk_pcie_find_port(struct pci_bus *bus, 340 unsigned int devfn) 341 { 342 struct mtk_pcie *pcie = bus->sysdata; 343 struct mtk_pcie_port *port; 344 struct pci_dev *dev = NULL; 345 346 /* 347 * Walk the bus hierarchy to get the devfn value 348 * of the port in the root bus. 349 */ 350 while (bus && bus->number) { 351 dev = bus->self; 352 bus = dev->bus; 353 devfn = dev->devfn; 354 } 355 356 list_for_each_entry(port, &pcie->ports, list) 357 if (port->slot == PCI_SLOT(devfn)) 358 return port; 359 360 return NULL; 361 } 362 363 static int mtk_pcie_config_read(struct pci_bus *bus, unsigned int devfn, 364 int where, int size, u32 *val) 365 { 366 struct mtk_pcie_port *port; 367 u32 bn = bus->number; 368 369 port = mtk_pcie_find_port(bus, devfn); 370 if (!port) 371 return PCIBIOS_DEVICE_NOT_FOUND; 372 373 return mtk_pcie_hw_rd_cfg(port, bn, devfn, where, size, val); 374 } 375 376 static int mtk_pcie_config_write(struct pci_bus *bus, unsigned int devfn, 377 int where, int size, u32 val) 378 { 379 struct mtk_pcie_port *port; 380 u32 bn = bus->number; 381 382 port = mtk_pcie_find_port(bus, devfn); 383 if (!port) 384 return PCIBIOS_DEVICE_NOT_FOUND; 385 386 return mtk_pcie_hw_wr_cfg(port, bn, devfn, where, size, val); 387 } 388 389 static struct pci_ops mtk_pcie_ops_v2 = { 390 .read = mtk_pcie_config_read, 391 .write = mtk_pcie_config_write, 392 }; 393 394 static void mtk_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) 395 { 396 struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); 397 phys_addr_t addr; 398 399 /* MT2712/MT7622 only support 32-bit MSI addresses */ 400 addr = virt_to_phys(port->base + PCIE_MSI_VECTOR); 401 msg->address_hi = 0; 402 msg->address_lo = lower_32_bits(addr); 403 404 msg->data = data->hwirq; 405 406 dev_dbg(port->pcie->dev, "msi#%d address_hi %#x address_lo %#x\n", 407 (int)data->hwirq, msg->address_hi, msg->address_lo); 408 } 409 410 static int mtk_msi_set_affinity(struct irq_data *irq_data, 411 const struct cpumask *mask, bool force) 412 { 413 return -EINVAL; 414 } 415 416 static void mtk_msi_ack_irq(struct irq_data *data) 417 { 418 struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); 419 u32 hwirq = data->hwirq; 420 421 writel(1 << hwirq, port->base + PCIE_IMSI_STATUS); 422 } 423 424 static struct irq_chip mtk_msi_bottom_irq_chip = { 425 .name = "MTK MSI", 426 .irq_compose_msi_msg = mtk_compose_msi_msg, 427 .irq_set_affinity = mtk_msi_set_affinity, 428 .irq_ack = mtk_msi_ack_irq, 429 }; 430 431 static int mtk_pcie_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 432 unsigned int nr_irqs, void *args) 433 { 434 struct mtk_pcie_port *port = domain->host_data; 435 unsigned long bit; 436 437 WARN_ON(nr_irqs != 1); 438 mutex_lock(&port->lock); 439 440 bit = find_first_zero_bit(port->msi_irq_in_use, MTK_MSI_IRQS_NUM); 441 if (bit >= MTK_MSI_IRQS_NUM) { 442 mutex_unlock(&port->lock); 443 return -ENOSPC; 444 } 445 446 __set_bit(bit, port->msi_irq_in_use); 447 448 mutex_unlock(&port->lock); 449 450 irq_domain_set_info(domain, virq, bit, &mtk_msi_bottom_irq_chip, 451 domain->host_data, handle_edge_irq, 452 NULL, NULL); 453 454 return 0; 455 } 456 457 static void mtk_pcie_irq_domain_free(struct irq_domain *domain, 458 unsigned int virq, unsigned int nr_irqs) 459 { 460 struct irq_data *d = irq_domain_get_irq_data(domain, virq); 461 struct mtk_pcie_port *port = irq_data_get_irq_chip_data(d); 462 463 mutex_lock(&port->lock); 464 465 if (!test_bit(d->hwirq, port->msi_irq_in_use)) 466 dev_err(port->pcie->dev, "trying to free unused MSI#%lu\n", 467 d->hwirq); 468 else 469 __clear_bit(d->hwirq, port->msi_irq_in_use); 470 471 mutex_unlock(&port->lock); 472 473 irq_domain_free_irqs_parent(domain, virq, nr_irqs); 474 } 475 476 static const struct irq_domain_ops msi_domain_ops = { 477 .alloc = mtk_pcie_irq_domain_alloc, 478 .free = mtk_pcie_irq_domain_free, 479 }; 480 481 static struct irq_chip mtk_msi_irq_chip = { 482 .name = "MTK PCIe MSI", 483 .irq_ack = irq_chip_ack_parent, 484 .irq_mask = pci_msi_mask_irq, 485 .irq_unmask = pci_msi_unmask_irq, 486 }; 487 488 static struct msi_domain_info mtk_msi_domain_info = { 489 .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | 490 MSI_FLAG_PCI_MSIX), 491 .chip = &mtk_msi_irq_chip, 492 }; 493 494 static int mtk_pcie_allocate_msi_domains(struct mtk_pcie_port *port) 495 { 496 struct fwnode_handle *fwnode = of_node_to_fwnode(port->pcie->dev->of_node); 497 498 mutex_init(&port->lock); 499 500 port->inner_domain = irq_domain_create_linear(fwnode, MTK_MSI_IRQS_NUM, 501 &msi_domain_ops, port); 502 if (!port->inner_domain) { 503 dev_err(port->pcie->dev, "failed to create IRQ domain\n"); 504 return -ENOMEM; 505 } 506 507 port->msi_domain = pci_msi_create_irq_domain(fwnode, &mtk_msi_domain_info, 508 port->inner_domain); 509 if (!port->msi_domain) { 510 dev_err(port->pcie->dev, "failed to create MSI domain\n"); 511 irq_domain_remove(port->inner_domain); 512 return -ENOMEM; 513 } 514 515 return 0; 516 } 517 518 static void mtk_pcie_enable_msi(struct mtk_pcie_port *port) 519 { 520 u32 val; 521 phys_addr_t msg_addr; 522 523 msg_addr = virt_to_phys(port->base + PCIE_MSI_VECTOR); 524 val = lower_32_bits(msg_addr); 525 writel(val, port->base + PCIE_IMSI_ADDR); 526 527 val = readl(port->base + PCIE_INT_MASK); 528 val &= ~MSI_MASK; 529 writel(val, port->base + PCIE_INT_MASK); 530 } 531 532 static void mtk_pcie_irq_teardown(struct mtk_pcie *pcie) 533 { 534 struct mtk_pcie_port *port, *tmp; 535 536 list_for_each_entry_safe(port, tmp, &pcie->ports, list) { 537 irq_set_chained_handler_and_data(port->irq, NULL, NULL); 538 539 if (port->irq_domain) 540 irq_domain_remove(port->irq_domain); 541 542 if (IS_ENABLED(CONFIG_PCI_MSI)) { 543 if (port->msi_domain) 544 irq_domain_remove(port->msi_domain); 545 if (port->inner_domain) 546 irq_domain_remove(port->inner_domain); 547 } 548 549 irq_dispose_mapping(port->irq); 550 } 551 } 552 553 static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq, 554 irq_hw_number_t hwirq) 555 { 556 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq); 557 irq_set_chip_data(irq, domain->host_data); 558 559 return 0; 560 } 561 562 static const struct irq_domain_ops intx_domain_ops = { 563 .map = mtk_pcie_intx_map, 564 }; 565 566 static int mtk_pcie_init_irq_domain(struct mtk_pcie_port *port, 567 struct device_node *node) 568 { 569 struct device *dev = port->pcie->dev; 570 struct device_node *pcie_intc_node; 571 int ret; 572 573 /* Setup INTx */ 574 pcie_intc_node = of_get_next_child(node, NULL); 575 if (!pcie_intc_node) { 576 dev_err(dev, "no PCIe Intc node found\n"); 577 return -ENODEV; 578 } 579 580 port->irq_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, 581 &intx_domain_ops, port); 582 of_node_put(pcie_intc_node); 583 if (!port->irq_domain) { 584 dev_err(dev, "failed to get INTx IRQ domain\n"); 585 return -ENODEV; 586 } 587 588 if (IS_ENABLED(CONFIG_PCI_MSI)) { 589 ret = mtk_pcie_allocate_msi_domains(port); 590 if (ret) 591 return ret; 592 } 593 594 return 0; 595 } 596 597 static void mtk_pcie_intr_handler(struct irq_desc *desc) 598 { 599 struct mtk_pcie_port *port = irq_desc_get_handler_data(desc); 600 struct irq_chip *irqchip = irq_desc_get_chip(desc); 601 unsigned long status; 602 u32 bit = INTX_SHIFT; 603 604 chained_irq_enter(irqchip, desc); 605 606 status = readl(port->base + PCIE_INT_STATUS); 607 if (status & INTX_MASK) { 608 for_each_set_bit_from(bit, &status, PCI_NUM_INTX + INTX_SHIFT) { 609 /* Clear the INTx */ 610 writel(1 << bit, port->base + PCIE_INT_STATUS); 611 generic_handle_domain_irq(port->irq_domain, 612 bit - INTX_SHIFT); 613 } 614 } 615 616 if (IS_ENABLED(CONFIG_PCI_MSI)) { 617 if (status & MSI_STATUS){ 618 unsigned long imsi_status; 619 620 while ((imsi_status = readl(port->base + PCIE_IMSI_STATUS))) { 621 for_each_set_bit(bit, &imsi_status, MTK_MSI_IRQS_NUM) 622 generic_handle_domain_irq(port->inner_domain, bit); 623 } 624 /* Clear MSI interrupt status */ 625 writel(MSI_STATUS, port->base + PCIE_INT_STATUS); 626 } 627 } 628 629 chained_irq_exit(irqchip, desc); 630 } 631 632 static int mtk_pcie_setup_irq(struct mtk_pcie_port *port, 633 struct device_node *node) 634 { 635 struct mtk_pcie *pcie = port->pcie; 636 struct device *dev = pcie->dev; 637 struct platform_device *pdev = to_platform_device(dev); 638 int err; 639 640 err = mtk_pcie_init_irq_domain(port, node); 641 if (err) { 642 dev_err(dev, "failed to init PCIe IRQ domain\n"); 643 return err; 644 } 645 646 if (of_find_property(dev->of_node, "interrupt-names", NULL)) 647 port->irq = platform_get_irq_byname(pdev, "pcie_irq"); 648 else 649 port->irq = platform_get_irq(pdev, port->slot); 650 651 if (port->irq < 0) 652 return port->irq; 653 654 irq_set_chained_handler_and_data(port->irq, 655 mtk_pcie_intr_handler, port); 656 657 return 0; 658 } 659 660 static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) 661 { 662 struct mtk_pcie *pcie = port->pcie; 663 struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); 664 struct resource *mem = NULL; 665 struct resource_entry *entry; 666 const struct mtk_pcie_soc *soc = port->pcie->soc; 667 u32 val; 668 int err; 669 670 entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); 671 if (entry) 672 mem = entry->res; 673 if (!mem) 674 return -EINVAL; 675 676 /* MT7622 platforms need to enable LTSSM and ASPM from PCIe subsys */ 677 if (pcie->base) { 678 val = readl(pcie->base + PCIE_SYS_CFG_V2); 679 val |= PCIE_CSR_LTSSM_EN(port->slot) | 680 PCIE_CSR_ASPM_L1_EN(port->slot); 681 writel(val, pcie->base + PCIE_SYS_CFG_V2); 682 } else if (pcie->cfg) { 683 val = PCIE_CSR_LTSSM_EN(port->slot) | 684 PCIE_CSR_ASPM_L1_EN(port->slot); 685 regmap_update_bits(pcie->cfg, PCIE_SYS_CFG_V2, val, val); 686 } 687 688 /* Assert all reset signals */ 689 writel(0, port->base + PCIE_RST_CTRL); 690 691 /* 692 * Enable PCIe link down reset, if link status changed from link up to 693 * link down, this will reset MAC control registers and configuration 694 * space. 695 */ 696 writel(PCIE_LINKDOWN_RST_EN, port->base + PCIE_RST_CTRL); 697 698 /* 699 * Described in PCIe CEM specification sections 2.2 (PERST# Signal) and 700 * 2.2.1 (Initial Power-Up (G3 to S0)). The deassertion of PERST# should 701 * be delayed 100ms (TPVPERL) for the power and clock to become stable. 702 */ 703 msleep(100); 704 705 /* De-assert PHY, PE, PIPE, MAC and configuration reset */ 706 val = readl(port->base + PCIE_RST_CTRL); 707 val |= PCIE_PHY_RSTB | PCIE_PERSTB | PCIE_PIPE_SRSTB | 708 PCIE_MAC_SRSTB | PCIE_CRSTB; 709 writel(val, port->base + PCIE_RST_CTRL); 710 711 /* Set up vendor ID and class code */ 712 if (soc->need_fix_class_id) { 713 val = PCI_VENDOR_ID_MEDIATEK; 714 writew(val, port->base + PCIE_CONF_VEND_ID); 715 716 val = PCI_CLASS_BRIDGE_PCI; 717 writew(val, port->base + PCIE_CONF_CLASS_ID); 718 } 719 720 if (soc->need_fix_device_id) 721 writew(soc->device_id, port->base + PCIE_CONF_DEVICE_ID); 722 723 /* 100ms timeout value should be enough for Gen1/2 training */ 724 err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_V2, val, 725 !!(val & PCIE_PORT_LINKUP_V2), 20, 726 100 * USEC_PER_MSEC); 727 if (err) 728 return -ETIMEDOUT; 729 730 /* Set INTx mask */ 731 val = readl(port->base + PCIE_INT_MASK); 732 val &= ~INTX_MASK; 733 writel(val, port->base + PCIE_INT_MASK); 734 735 if (IS_ENABLED(CONFIG_PCI_MSI)) 736 mtk_pcie_enable_msi(port); 737 738 /* Set AHB to PCIe translation windows */ 739 val = lower_32_bits(mem->start) | 740 AHB2PCIE_SIZE(fls(resource_size(mem))); 741 writel(val, port->base + PCIE_AHB_TRANS_BASE0_L); 742 743 val = upper_32_bits(mem->start); 744 writel(val, port->base + PCIE_AHB_TRANS_BASE0_H); 745 746 /* Set PCIe to AXI translation memory space.*/ 747 val = PCIE2AHB_SIZE | WIN_ENABLE; 748 writel(val, port->base + PCIE_AXI_WINDOW0); 749 750 return 0; 751 } 752 753 static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus, 754 unsigned int devfn, int where) 755 { 756 struct mtk_pcie *pcie = bus->sysdata; 757 758 writel(PCIE_CONF_ADDR(where, PCI_FUNC(devfn), PCI_SLOT(devfn), 759 bus->number), pcie->base + PCIE_CFG_ADDR); 760 761 return pcie->base + PCIE_CFG_DATA + (where & 3); 762 } 763 764 static struct pci_ops mtk_pcie_ops = { 765 .map_bus = mtk_pcie_map_bus, 766 .read = pci_generic_config_read, 767 .write = pci_generic_config_write, 768 }; 769 770 static int mtk_pcie_startup_port(struct mtk_pcie_port *port) 771 { 772 struct mtk_pcie *pcie = port->pcie; 773 u32 func = PCI_FUNC(port->slot); 774 u32 slot = PCI_SLOT(port->slot << 3); 775 u32 val; 776 int err; 777 778 /* assert port PERST_N */ 779 val = readl(pcie->base + PCIE_SYS_CFG); 780 val |= PCIE_PORT_PERST(port->slot); 781 writel(val, pcie->base + PCIE_SYS_CFG); 782 783 /* de-assert port PERST_N */ 784 val = readl(pcie->base + PCIE_SYS_CFG); 785 val &= ~PCIE_PORT_PERST(port->slot); 786 writel(val, pcie->base + PCIE_SYS_CFG); 787 788 /* 100ms timeout value should be enough for Gen1/2 training */ 789 err = readl_poll_timeout(port->base + PCIE_LINK_STATUS, val, 790 !!(val & PCIE_PORT_LINKUP), 20, 791 100 * USEC_PER_MSEC); 792 if (err) 793 return -ETIMEDOUT; 794 795 /* enable interrupt */ 796 val = readl(pcie->base + PCIE_INT_ENABLE); 797 val |= PCIE_PORT_INT_EN(port->slot); 798 writel(val, pcie->base + PCIE_INT_ENABLE); 799 800 /* map to all DDR region. We need to set it before cfg operation. */ 801 writel(PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE, 802 port->base + PCIE_BAR0_SETUP); 803 804 /* configure class code and revision ID */ 805 writel(PCIE_CLASS_CODE | PCIE_REVISION_ID, port->base + PCIE_CLASS); 806 807 /* configure FC credit */ 808 writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0), 809 pcie->base + PCIE_CFG_ADDR); 810 val = readl(pcie->base + PCIE_CFG_DATA); 811 val &= ~PCIE_FC_CREDIT_MASK; 812 val |= PCIE_FC_CREDIT_VAL(0x806c); 813 writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0), 814 pcie->base + PCIE_CFG_ADDR); 815 writel(val, pcie->base + PCIE_CFG_DATA); 816 817 /* configure RC FTS number to 250 when it leaves L0s */ 818 writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0), 819 pcie->base + PCIE_CFG_ADDR); 820 val = readl(pcie->base + PCIE_CFG_DATA); 821 val &= ~PCIE_FTS_NUM_MASK; 822 val |= PCIE_FTS_NUM_L0(0x50); 823 writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0), 824 pcie->base + PCIE_CFG_ADDR); 825 writel(val, pcie->base + PCIE_CFG_DATA); 826 827 return 0; 828 } 829 830 static void mtk_pcie_enable_port(struct mtk_pcie_port *port) 831 { 832 struct mtk_pcie *pcie = port->pcie; 833 struct device *dev = pcie->dev; 834 int err; 835 836 err = clk_prepare_enable(port->sys_ck); 837 if (err) { 838 dev_err(dev, "failed to enable sys_ck%d clock\n", port->slot); 839 goto err_sys_clk; 840 } 841 842 err = clk_prepare_enable(port->ahb_ck); 843 if (err) { 844 dev_err(dev, "failed to enable ahb_ck%d\n", port->slot); 845 goto err_ahb_clk; 846 } 847 848 err = clk_prepare_enable(port->aux_ck); 849 if (err) { 850 dev_err(dev, "failed to enable aux_ck%d\n", port->slot); 851 goto err_aux_clk; 852 } 853 854 err = clk_prepare_enable(port->axi_ck); 855 if (err) { 856 dev_err(dev, "failed to enable axi_ck%d\n", port->slot); 857 goto err_axi_clk; 858 } 859 860 err = clk_prepare_enable(port->obff_ck); 861 if (err) { 862 dev_err(dev, "failed to enable obff_ck%d\n", port->slot); 863 goto err_obff_clk; 864 } 865 866 err = clk_prepare_enable(port->pipe_ck); 867 if (err) { 868 dev_err(dev, "failed to enable pipe_ck%d\n", port->slot); 869 goto err_pipe_clk; 870 } 871 872 reset_control_assert(port->reset); 873 reset_control_deassert(port->reset); 874 875 err = phy_init(port->phy); 876 if (err) { 877 dev_err(dev, "failed to initialize port%d phy\n", port->slot); 878 goto err_phy_init; 879 } 880 881 err = phy_power_on(port->phy); 882 if (err) { 883 dev_err(dev, "failed to power on port%d phy\n", port->slot); 884 goto err_phy_on; 885 } 886 887 if (!pcie->soc->startup(port)) 888 return; 889 890 dev_info(dev, "Port%d link down\n", port->slot); 891 892 phy_power_off(port->phy); 893 err_phy_on: 894 phy_exit(port->phy); 895 err_phy_init: 896 clk_disable_unprepare(port->pipe_ck); 897 err_pipe_clk: 898 clk_disable_unprepare(port->obff_ck); 899 err_obff_clk: 900 clk_disable_unprepare(port->axi_ck); 901 err_axi_clk: 902 clk_disable_unprepare(port->aux_ck); 903 err_aux_clk: 904 clk_disable_unprepare(port->ahb_ck); 905 err_ahb_clk: 906 clk_disable_unprepare(port->sys_ck); 907 err_sys_clk: 908 mtk_pcie_port_free(port); 909 } 910 911 static int mtk_pcie_parse_port(struct mtk_pcie *pcie, 912 struct device_node *node, 913 int slot) 914 { 915 struct mtk_pcie_port *port; 916 struct device *dev = pcie->dev; 917 struct platform_device *pdev = to_platform_device(dev); 918 char name[10]; 919 int err; 920 921 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 922 if (!port) 923 return -ENOMEM; 924 925 snprintf(name, sizeof(name), "port%d", slot); 926 port->base = devm_platform_ioremap_resource_byname(pdev, name); 927 if (IS_ERR(port->base)) { 928 dev_err(dev, "failed to map port%d base\n", slot); 929 return PTR_ERR(port->base); 930 } 931 932 snprintf(name, sizeof(name), "sys_ck%d", slot); 933 port->sys_ck = devm_clk_get(dev, name); 934 if (IS_ERR(port->sys_ck)) { 935 dev_err(dev, "failed to get sys_ck%d clock\n", slot); 936 return PTR_ERR(port->sys_ck); 937 } 938 939 /* sys_ck might be divided into the following parts in some chips */ 940 snprintf(name, sizeof(name), "ahb_ck%d", slot); 941 port->ahb_ck = devm_clk_get_optional(dev, name); 942 if (IS_ERR(port->ahb_ck)) 943 return PTR_ERR(port->ahb_ck); 944 945 snprintf(name, sizeof(name), "axi_ck%d", slot); 946 port->axi_ck = devm_clk_get_optional(dev, name); 947 if (IS_ERR(port->axi_ck)) 948 return PTR_ERR(port->axi_ck); 949 950 snprintf(name, sizeof(name), "aux_ck%d", slot); 951 port->aux_ck = devm_clk_get_optional(dev, name); 952 if (IS_ERR(port->aux_ck)) 953 return PTR_ERR(port->aux_ck); 954 955 snprintf(name, sizeof(name), "obff_ck%d", slot); 956 port->obff_ck = devm_clk_get_optional(dev, name); 957 if (IS_ERR(port->obff_ck)) 958 return PTR_ERR(port->obff_ck); 959 960 snprintf(name, sizeof(name), "pipe_ck%d", slot); 961 port->pipe_ck = devm_clk_get_optional(dev, name); 962 if (IS_ERR(port->pipe_ck)) 963 return PTR_ERR(port->pipe_ck); 964 965 snprintf(name, sizeof(name), "pcie-rst%d", slot); 966 port->reset = devm_reset_control_get_optional_exclusive(dev, name); 967 if (PTR_ERR(port->reset) == -EPROBE_DEFER) 968 return PTR_ERR(port->reset); 969 970 /* some platforms may use default PHY setting */ 971 snprintf(name, sizeof(name), "pcie-phy%d", slot); 972 port->phy = devm_phy_optional_get(dev, name); 973 if (IS_ERR(port->phy)) 974 return PTR_ERR(port->phy); 975 976 port->slot = slot; 977 port->pcie = pcie; 978 979 if (pcie->soc->setup_irq) { 980 err = pcie->soc->setup_irq(port, node); 981 if (err) 982 return err; 983 } 984 985 INIT_LIST_HEAD(&port->list); 986 list_add_tail(&port->list, &pcie->ports); 987 988 return 0; 989 } 990 991 static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie) 992 { 993 struct device *dev = pcie->dev; 994 struct platform_device *pdev = to_platform_device(dev); 995 struct resource *regs; 996 struct device_node *cfg_node; 997 int err; 998 999 /* get shared registers, which are optional */ 1000 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "subsys"); 1001 if (regs) { 1002 pcie->base = devm_ioremap_resource(dev, regs); 1003 if (IS_ERR(pcie->base)) 1004 return PTR_ERR(pcie->base); 1005 } 1006 1007 cfg_node = of_find_compatible_node(NULL, NULL, 1008 "mediatek,generic-pciecfg"); 1009 if (cfg_node) { 1010 pcie->cfg = syscon_node_to_regmap(cfg_node); 1011 of_node_put(cfg_node); 1012 if (IS_ERR(pcie->cfg)) 1013 return PTR_ERR(pcie->cfg); 1014 } 1015 1016 pcie->free_ck = devm_clk_get(dev, "free_ck"); 1017 if (IS_ERR(pcie->free_ck)) { 1018 if (PTR_ERR(pcie->free_ck) == -EPROBE_DEFER) 1019 return -EPROBE_DEFER; 1020 1021 pcie->free_ck = NULL; 1022 } 1023 1024 pm_runtime_enable(dev); 1025 pm_runtime_get_sync(dev); 1026 1027 /* enable top level clock */ 1028 err = clk_prepare_enable(pcie->free_ck); 1029 if (err) { 1030 dev_err(dev, "failed to enable free_ck\n"); 1031 goto err_free_ck; 1032 } 1033 1034 return 0; 1035 1036 err_free_ck: 1037 pm_runtime_put_sync(dev); 1038 pm_runtime_disable(dev); 1039 1040 return err; 1041 } 1042 1043 static int mtk_pcie_setup(struct mtk_pcie *pcie) 1044 { 1045 struct device *dev = pcie->dev; 1046 struct device_node *node = dev->of_node, *child; 1047 struct mtk_pcie_port *port, *tmp; 1048 int err, slot; 1049 1050 slot = of_get_pci_domain_nr(dev->of_node); 1051 if (slot < 0) { 1052 for_each_available_child_of_node(node, child) { 1053 err = of_pci_get_devfn(child); 1054 if (err < 0) { 1055 dev_err(dev, "failed to get devfn: %d\n", err); 1056 goto error_put_node; 1057 } 1058 1059 slot = PCI_SLOT(err); 1060 1061 err = mtk_pcie_parse_port(pcie, child, slot); 1062 if (err) 1063 goto error_put_node; 1064 } 1065 } else { 1066 err = mtk_pcie_parse_port(pcie, node, slot); 1067 if (err) 1068 return err; 1069 } 1070 1071 err = mtk_pcie_subsys_powerup(pcie); 1072 if (err) 1073 return err; 1074 1075 /* enable each port, and then check link status */ 1076 list_for_each_entry_safe(port, tmp, &pcie->ports, list) 1077 mtk_pcie_enable_port(port); 1078 1079 /* power down PCIe subsys if slots are all empty (link down) */ 1080 if (list_empty(&pcie->ports)) 1081 mtk_pcie_subsys_powerdown(pcie); 1082 1083 return 0; 1084 error_put_node: 1085 of_node_put(child); 1086 return err; 1087 } 1088 1089 static int mtk_pcie_probe(struct platform_device *pdev) 1090 { 1091 struct device *dev = &pdev->dev; 1092 struct mtk_pcie *pcie; 1093 struct pci_host_bridge *host; 1094 int err; 1095 1096 host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); 1097 if (!host) 1098 return -ENOMEM; 1099 1100 pcie = pci_host_bridge_priv(host); 1101 1102 pcie->dev = dev; 1103 pcie->soc = of_device_get_match_data(dev); 1104 platform_set_drvdata(pdev, pcie); 1105 INIT_LIST_HEAD(&pcie->ports); 1106 1107 err = mtk_pcie_setup(pcie); 1108 if (err) 1109 return err; 1110 1111 host->ops = pcie->soc->ops; 1112 host->sysdata = pcie; 1113 host->msi_domain = pcie->soc->no_msi; 1114 1115 err = pci_host_probe(host); 1116 if (err) 1117 goto put_resources; 1118 1119 return 0; 1120 1121 put_resources: 1122 if (!list_empty(&pcie->ports)) 1123 mtk_pcie_put_resources(pcie); 1124 1125 return err; 1126 } 1127 1128 1129 static void mtk_pcie_free_resources(struct mtk_pcie *pcie) 1130 { 1131 struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); 1132 struct list_head *windows = &host->windows; 1133 1134 pci_free_resource_list(windows); 1135 } 1136 1137 static int mtk_pcie_remove(struct platform_device *pdev) 1138 { 1139 struct mtk_pcie *pcie = platform_get_drvdata(pdev); 1140 struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); 1141 1142 pci_stop_root_bus(host->bus); 1143 pci_remove_root_bus(host->bus); 1144 mtk_pcie_free_resources(pcie); 1145 1146 mtk_pcie_irq_teardown(pcie); 1147 1148 mtk_pcie_put_resources(pcie); 1149 1150 return 0; 1151 } 1152 1153 static int __maybe_unused mtk_pcie_suspend_noirq(struct device *dev) 1154 { 1155 struct mtk_pcie *pcie = dev_get_drvdata(dev); 1156 struct mtk_pcie_port *port; 1157 1158 if (list_empty(&pcie->ports)) 1159 return 0; 1160 1161 list_for_each_entry(port, &pcie->ports, list) { 1162 clk_disable_unprepare(port->pipe_ck); 1163 clk_disable_unprepare(port->obff_ck); 1164 clk_disable_unprepare(port->axi_ck); 1165 clk_disable_unprepare(port->aux_ck); 1166 clk_disable_unprepare(port->ahb_ck); 1167 clk_disable_unprepare(port->sys_ck); 1168 phy_power_off(port->phy); 1169 phy_exit(port->phy); 1170 } 1171 1172 clk_disable_unprepare(pcie->free_ck); 1173 1174 return 0; 1175 } 1176 1177 static int __maybe_unused mtk_pcie_resume_noirq(struct device *dev) 1178 { 1179 struct mtk_pcie *pcie = dev_get_drvdata(dev); 1180 struct mtk_pcie_port *port, *tmp; 1181 1182 if (list_empty(&pcie->ports)) 1183 return 0; 1184 1185 clk_prepare_enable(pcie->free_ck); 1186 1187 list_for_each_entry_safe(port, tmp, &pcie->ports, list) 1188 mtk_pcie_enable_port(port); 1189 1190 /* In case of EP was removed while system suspend. */ 1191 if (list_empty(&pcie->ports)) 1192 clk_disable_unprepare(pcie->free_ck); 1193 1194 return 0; 1195 } 1196 1197 static const struct dev_pm_ops mtk_pcie_pm_ops = { 1198 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, 1199 mtk_pcie_resume_noirq) 1200 }; 1201 1202 static const struct mtk_pcie_soc mtk_pcie_soc_v1 = { 1203 .no_msi = true, 1204 .ops = &mtk_pcie_ops, 1205 .startup = mtk_pcie_startup_port, 1206 }; 1207 1208 static const struct mtk_pcie_soc mtk_pcie_soc_mt2712 = { 1209 .ops = &mtk_pcie_ops_v2, 1210 .startup = mtk_pcie_startup_port_v2, 1211 .setup_irq = mtk_pcie_setup_irq, 1212 }; 1213 1214 static const struct mtk_pcie_soc mtk_pcie_soc_mt7622 = { 1215 .need_fix_class_id = true, 1216 .ops = &mtk_pcie_ops_v2, 1217 .startup = mtk_pcie_startup_port_v2, 1218 .setup_irq = mtk_pcie_setup_irq, 1219 }; 1220 1221 static const struct mtk_pcie_soc mtk_pcie_soc_mt7629 = { 1222 .need_fix_class_id = true, 1223 .need_fix_device_id = true, 1224 .device_id = PCI_DEVICE_ID_MEDIATEK_7629, 1225 .ops = &mtk_pcie_ops_v2, 1226 .startup = mtk_pcie_startup_port_v2, 1227 .setup_irq = mtk_pcie_setup_irq, 1228 }; 1229 1230 static const struct of_device_id mtk_pcie_ids[] = { 1231 { .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 }, 1232 { .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 }, 1233 { .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_mt2712 }, 1234 { .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_mt7622 }, 1235 { .compatible = "mediatek,mt7629-pcie", .data = &mtk_pcie_soc_mt7629 }, 1236 {}, 1237 }; 1238 MODULE_DEVICE_TABLE(of, mtk_pcie_ids); 1239 1240 static struct platform_driver mtk_pcie_driver = { 1241 .probe = mtk_pcie_probe, 1242 .remove = mtk_pcie_remove, 1243 .driver = { 1244 .name = "mtk-pcie", 1245 .of_match_table = mtk_pcie_ids, 1246 .suppress_bind_attrs = true, 1247 .pm = &mtk_pcie_pm_ops, 1248 }, 1249 }; 1250 module_platform_driver(mtk_pcie_driver); 1251 MODULE_LICENSE("GPL v2"); 1252