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/irqchip/irq-msi-lib.h> 16 #include <linux/irqdomain.h> 17 #include <linux/kernel.h> 18 #include <linux/mfd/syscon.h> 19 #include <linux/msi.h> 20 #include <linux/module.h> 21 #include <linux/of_address.h> 22 #include <linux/of_pci.h> 23 #include <linux/of_platform.h> 24 #include <linux/pci.h> 25 #include <linux/phy/phy.h> 26 #include <linux/platform_device.h> 27 #include <linux/pm_runtime.h> 28 #include <linux/regmap.h> 29 #include <linux/reset.h> 30 31 #include "../pci.h" 32 33 /* PCIe shared registers */ 34 #define PCIE_SYS_CFG 0x00 35 #define PCIE_INT_ENABLE 0x0c 36 #define PCIE_CFG_ADDR 0x20 37 #define PCIE_CFG_DATA 0x24 38 39 /* PCIe per port registers */ 40 #define PCIE_BAR0_SETUP 0x10 41 #define PCIE_CLASS 0x34 42 #define PCIE_LINK_STATUS 0x50 43 44 #define PCIE_PORT_INT_EN(x) BIT(20 + (x)) 45 #define PCIE_PORT_PERST(x) BIT(1 + (x)) 46 #define PCIE_PORT_LINKUP BIT(0) 47 #define PCIE_BAR_MAP_MAX GENMASK(31, 16) 48 49 #define PCIE_BAR_ENABLE BIT(0) 50 #define PCIE_REVISION_ID BIT(0) 51 #define PCIE_CLASS_CODE (0x60400 << 8) 52 #define PCIE_CONF_REG(regn) (((regn) & GENMASK(7, 2)) | \ 53 ((((regn) >> 8) & GENMASK(3, 0)) << 24)) 54 #define PCIE_CONF_FUN(fun) (((fun) << 8) & GENMASK(10, 8)) 55 #define PCIE_CONF_DEV(dev) (((dev) << 11) & GENMASK(15, 11)) 56 #define PCIE_CONF_BUS(bus) (((bus) << 16) & GENMASK(23, 16)) 57 #define PCIE_CONF_ADDR(regn, fun, dev, bus) \ 58 (PCIE_CONF_REG(regn) | PCIE_CONF_FUN(fun) | \ 59 PCIE_CONF_DEV(dev) | PCIE_CONF_BUS(bus)) 60 61 /* MediaTek specific configuration registers */ 62 #define PCIE_FTS_NUM 0x70c 63 #define PCIE_FTS_NUM_MASK GENMASK(15, 8) 64 #define PCIE_FTS_NUM_L0(x) ((x) & 0xff << 8) 65 66 #define PCIE_FC_CREDIT 0x73c 67 #define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16)) 68 #define PCIE_FC_CREDIT_VAL(x) ((x) << 16) 69 70 /* PCIe V2 share registers */ 71 #define PCIE_SYS_CFG_V2 0x0 72 #define PCIE_CSR_LTSSM_EN(x) BIT(0 + (x) * 8) 73 #define PCIE_CSR_ASPM_L1_EN(x) BIT(1 + (x) * 8) 74 75 /* PCIe V2 per-port registers */ 76 #define PCIE_MSI_VECTOR 0x0c0 77 78 #define PCIE_CONF_VEND_ID 0x100 79 #define PCIE_CONF_DEVICE_ID 0x102 80 #define PCIE_CONF_CLASS_ID 0x106 81 82 #define PCIE_INT_MASK 0x420 83 #define INTX_MASK GENMASK(19, 16) 84 #define INTX_SHIFT 16 85 #define PCIE_INT_STATUS 0x424 86 #define MSI_STATUS BIT(23) 87 #define PCIE_IMSI_STATUS 0x42c 88 #define PCIE_IMSI_ADDR 0x430 89 #define MSI_MASK BIT(23) 90 #define MTK_MSI_IRQS_NUM 32 91 92 #define PCIE_AHB_TRANS_BASE0_L 0x438 93 #define PCIE_AHB_TRANS_BASE0_H 0x43c 94 #define AHB2PCIE_SIZE(x) ((x) & GENMASK(4, 0)) 95 #define PCIE_AXI_WINDOW0 0x448 96 #define WIN_ENABLE BIT(7) 97 /* 98 * Define PCIe to AHB window size as 2^33 to support max 8GB address space 99 * translate, support least 4GB DRAM size access from EP DMA(physical DRAM 100 * start from 0x40000000). 101 */ 102 #define PCIE2AHB_SIZE 0x21 103 104 /* PCIe V2 configuration transaction header */ 105 #define PCIE_CFG_HEADER0 0x460 106 #define PCIE_CFG_HEADER1 0x464 107 #define PCIE_CFG_HEADER2 0x468 108 #define PCIE_CFG_WDATA 0x470 109 #define PCIE_APP_TLP_REQ 0x488 110 #define PCIE_CFG_RDATA 0x48c 111 #define APP_CFG_REQ BIT(0) 112 #define APP_CPL_STATUS GENMASK(7, 5) 113 114 #define CFG_WRRD_TYPE_0 4 115 #define CFG_WR_FMT 2 116 #define CFG_RD_FMT 0 117 118 #define CFG_DW0_LENGTH(length) ((length) & GENMASK(9, 0)) 119 #define CFG_DW0_TYPE(type) (((type) << 24) & GENMASK(28, 24)) 120 #define CFG_DW0_FMT(fmt) (((fmt) << 29) & GENMASK(31, 29)) 121 #define CFG_DW2_REGN(regn) ((regn) & GENMASK(11, 2)) 122 #define CFG_DW2_FUN(fun) (((fun) << 16) & GENMASK(18, 16)) 123 #define CFG_DW2_DEV(dev) (((dev) << 19) & GENMASK(23, 19)) 124 #define CFG_DW2_BUS(bus) (((bus) << 24) & GENMASK(31, 24)) 125 #define CFG_HEADER_DW0(type, fmt) \ 126 (CFG_DW0_LENGTH(1) | CFG_DW0_TYPE(type) | CFG_DW0_FMT(fmt)) 127 #define CFG_HEADER_DW1(where, size) \ 128 (GENMASK(((size) - 1), 0) << ((where) & 0x3)) 129 #define CFG_HEADER_DW2(regn, fun, dev, bus) \ 130 (CFG_DW2_REGN(regn) | CFG_DW2_FUN(fun) | \ 131 CFG_DW2_DEV(dev) | CFG_DW2_BUS(bus)) 132 133 #define PCIE_RST_CTRL 0x510 134 #define PCIE_PHY_RSTB BIT(0) 135 #define PCIE_PIPE_SRSTB BIT(1) 136 #define PCIE_MAC_SRSTB BIT(2) 137 #define PCIE_CRSTB BIT(3) 138 #define PCIE_PERSTB BIT(8) 139 #define PCIE_LINKDOWN_RST_EN GENMASK(15, 13) 140 #define PCIE_LINK_STATUS_V2 0x804 141 #define PCIE_PORT_LINKUP_V2 BIT(10) 142 143 struct mtk_pcie_port; 144 145 /** 146 * enum mtk_pcie_quirks - MTK PCIe quirks 147 * @MTK_PCIE_FIX_CLASS_ID: host's class ID needed to be fixed 148 * @MTK_PCIE_FIX_DEVICE_ID: host's device ID needed to be fixed 149 * @MTK_PCIE_NO_MSI: Bridge has no MSI support, and relies on an external block 150 * @MTK_PCIE_SKIP_RSTB: Skip calling RSTB bits on PCIe probe 151 */ 152 enum mtk_pcie_quirks { 153 MTK_PCIE_FIX_CLASS_ID = BIT(0), 154 MTK_PCIE_FIX_DEVICE_ID = BIT(1), 155 MTK_PCIE_NO_MSI = BIT(2), 156 MTK_PCIE_SKIP_RSTB = BIT(3), 157 }; 158 159 /** 160 * struct mtk_pcie_soc - differentiate between host generations 161 * @device_id: device ID which this host need to be fixed 162 * @ops: pointer to configuration access functions 163 * @startup: pointer to controller setting functions 164 * @setup_irq: pointer to initialize IRQ functions 165 * @quirks: PCIe device quirks. 166 */ 167 struct mtk_pcie_soc { 168 unsigned int device_id; 169 struct pci_ops *ops; 170 int (*startup)(struct mtk_pcie_port *port); 171 int (*setup_irq)(struct mtk_pcie_port *port, struct device_node *node); 172 enum mtk_pcie_quirks quirks; 173 }; 174 175 /** 176 * struct mtk_pcie_port - PCIe port information 177 * @base: IO mapped register base 178 * @list: port list 179 * @pcie: pointer to PCIe host info 180 * @reset: pointer to port reset control 181 * @sys_ck: pointer to transaction/data link layer clock 182 * @ahb_ck: pointer to AHB slave interface operating clock for CSR access 183 * and RC initiated MMIO access 184 * @axi_ck: pointer to application layer MMIO channel operating clock 185 * @aux_ck: pointer to pe2_mac_bridge and pe2_mac_core operating clock 186 * when pcie_mac_ck/pcie_pipe_ck is turned off 187 * @obff_ck: pointer to OBFF functional block operating clock 188 * @pipe_ck: pointer to LTSSM and PHY/MAC layer operating clock 189 * @phy: pointer to PHY control block 190 * @slot: port slot 191 * @irq: GIC irq 192 * @irq_domain: legacy INTx IRQ domain 193 * @inner_domain: inner IRQ domain 194 * @lock: protect the msi_irq_in_use bitmap 195 * @msi_irq_in_use: bit map for assigned MSI IRQ 196 */ 197 struct mtk_pcie_port { 198 void __iomem *base; 199 struct list_head list; 200 struct mtk_pcie *pcie; 201 struct reset_control *reset; 202 struct clk *sys_ck; 203 struct clk *ahb_ck; 204 struct clk *axi_ck; 205 struct clk *aux_ck; 206 struct clk *obff_ck; 207 struct clk *pipe_ck; 208 struct phy *phy; 209 u32 slot; 210 int irq; 211 struct irq_domain *irq_domain; 212 struct irq_domain *inner_domain; 213 struct mutex lock; 214 DECLARE_BITMAP(msi_irq_in_use, MTK_MSI_IRQS_NUM); 215 }; 216 217 /** 218 * struct mtk_pcie - PCIe host information 219 * @dev: pointer to PCIe device 220 * @base: IO mapped register base 221 * @cfg: IO mapped register map for PCIe config 222 * @free_ck: free-run reference clock 223 * @ports: pointer to PCIe port information 224 * @soc: pointer to SoC-dependent operations 225 */ 226 struct mtk_pcie { 227 struct device *dev; 228 void __iomem *base; 229 struct regmap *cfg; 230 struct clk *free_ck; 231 232 struct list_head ports; 233 const struct mtk_pcie_soc *soc; 234 }; 235 236 static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie) 237 { 238 struct device *dev = pcie->dev; 239 240 clk_disable_unprepare(pcie->free_ck); 241 242 pm_runtime_put_sync(dev); 243 pm_runtime_disable(dev); 244 } 245 246 static void mtk_pcie_port_free(struct mtk_pcie_port *port) 247 { 248 struct mtk_pcie *pcie = port->pcie; 249 struct device *dev = pcie->dev; 250 251 devm_iounmap(dev, port->base); 252 list_del(&port->list); 253 devm_kfree(dev, port); 254 } 255 256 static void mtk_pcie_put_resources(struct mtk_pcie *pcie) 257 { 258 struct mtk_pcie_port *port, *tmp; 259 260 list_for_each_entry_safe(port, tmp, &pcie->ports, list) { 261 phy_power_off(port->phy); 262 phy_exit(port->phy); 263 clk_disable_unprepare(port->pipe_ck); 264 clk_disable_unprepare(port->obff_ck); 265 clk_disable_unprepare(port->axi_ck); 266 clk_disable_unprepare(port->aux_ck); 267 clk_disable_unprepare(port->ahb_ck); 268 clk_disable_unprepare(port->sys_ck); 269 mtk_pcie_port_free(port); 270 } 271 272 mtk_pcie_subsys_powerdown(pcie); 273 } 274 275 static int mtk_pcie_check_cfg_cpld(struct mtk_pcie_port *port) 276 { 277 u32 val; 278 int err; 279 280 err = readl_poll_timeout_atomic(port->base + PCIE_APP_TLP_REQ, val, 281 !(val & APP_CFG_REQ), 10, 282 100 * USEC_PER_MSEC); 283 if (err) 284 return PCIBIOS_SET_FAILED; 285 286 if (readl(port->base + PCIE_APP_TLP_REQ) & APP_CPL_STATUS) 287 return PCIBIOS_SET_FAILED; 288 289 return PCIBIOS_SUCCESSFUL; 290 } 291 292 static int mtk_pcie_hw_rd_cfg(struct mtk_pcie_port *port, u32 bus, u32 devfn, 293 int where, int size, u32 *val) 294 { 295 u32 tmp; 296 297 /* Write PCIe configuration transaction header for Cfgrd */ 298 writel(CFG_HEADER_DW0(CFG_WRRD_TYPE_0, CFG_RD_FMT), 299 port->base + PCIE_CFG_HEADER0); 300 writel(CFG_HEADER_DW1(where, size), port->base + PCIE_CFG_HEADER1); 301 writel(CFG_HEADER_DW2(where, PCI_FUNC(devfn), PCI_SLOT(devfn), bus), 302 port->base + PCIE_CFG_HEADER2); 303 304 /* Trigger h/w to transmit Cfgrd TLP */ 305 tmp = readl(port->base + PCIE_APP_TLP_REQ); 306 tmp |= APP_CFG_REQ; 307 writel(tmp, port->base + PCIE_APP_TLP_REQ); 308 309 /* Check completion status */ 310 if (mtk_pcie_check_cfg_cpld(port)) 311 return PCIBIOS_SET_FAILED; 312 313 /* Read cpld payload of Cfgrd */ 314 *val = readl(port->base + PCIE_CFG_RDATA); 315 316 if (size == 1) 317 *val = (*val >> (8 * (where & 3))) & 0xff; 318 else if (size == 2) 319 *val = (*val >> (8 * (where & 3))) & 0xffff; 320 321 return PCIBIOS_SUCCESSFUL; 322 } 323 324 static int mtk_pcie_hw_wr_cfg(struct mtk_pcie_port *port, u32 bus, u32 devfn, 325 int where, int size, u32 val) 326 { 327 /* Write PCIe configuration transaction header for Cfgwr */ 328 writel(CFG_HEADER_DW0(CFG_WRRD_TYPE_0, CFG_WR_FMT), 329 port->base + PCIE_CFG_HEADER0); 330 writel(CFG_HEADER_DW1(where, size), port->base + PCIE_CFG_HEADER1); 331 writel(CFG_HEADER_DW2(where, PCI_FUNC(devfn), PCI_SLOT(devfn), bus), 332 port->base + PCIE_CFG_HEADER2); 333 334 /* Write Cfgwr data */ 335 val = val << 8 * (where & 3); 336 writel(val, port->base + PCIE_CFG_WDATA); 337 338 /* Trigger h/w to transmit Cfgwr TLP */ 339 val = readl(port->base + PCIE_APP_TLP_REQ); 340 val |= APP_CFG_REQ; 341 writel(val, port->base + PCIE_APP_TLP_REQ); 342 343 /* Check completion status */ 344 return mtk_pcie_check_cfg_cpld(port); 345 } 346 347 static struct mtk_pcie_port *mtk_pcie_find_port(struct pci_bus *bus, 348 unsigned int devfn) 349 { 350 struct mtk_pcie *pcie = bus->sysdata; 351 struct mtk_pcie_port *port; 352 struct pci_dev *dev = NULL; 353 354 /* 355 * Walk the bus hierarchy to get the devfn value 356 * of the port in the root bus. 357 */ 358 while (bus && bus->number) { 359 dev = bus->self; 360 bus = dev->bus; 361 devfn = dev->devfn; 362 } 363 364 list_for_each_entry(port, &pcie->ports, list) 365 if (port->slot == PCI_SLOT(devfn)) 366 return port; 367 368 return NULL; 369 } 370 371 static int mtk_pcie_config_read(struct pci_bus *bus, unsigned int devfn, 372 int where, int size, u32 *val) 373 { 374 struct mtk_pcie_port *port; 375 u32 bn = bus->number; 376 377 port = mtk_pcie_find_port(bus, devfn); 378 if (!port) 379 return PCIBIOS_DEVICE_NOT_FOUND; 380 381 return mtk_pcie_hw_rd_cfg(port, bn, devfn, where, size, val); 382 } 383 384 static int mtk_pcie_config_write(struct pci_bus *bus, unsigned int devfn, 385 int where, int size, u32 val) 386 { 387 struct mtk_pcie_port *port; 388 u32 bn = bus->number; 389 390 port = mtk_pcie_find_port(bus, devfn); 391 if (!port) 392 return PCIBIOS_DEVICE_NOT_FOUND; 393 394 return mtk_pcie_hw_wr_cfg(port, bn, devfn, where, size, val); 395 } 396 397 static struct pci_ops mtk_pcie_ops_v2 = { 398 .read = mtk_pcie_config_read, 399 .write = mtk_pcie_config_write, 400 }; 401 402 static void mtk_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) 403 { 404 struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); 405 phys_addr_t addr; 406 407 /* MT2712/MT7622 only support 32-bit MSI addresses */ 408 addr = virt_to_phys(port->base + PCIE_MSI_VECTOR); 409 msg->address_hi = 0; 410 msg->address_lo = lower_32_bits(addr); 411 412 msg->data = data->hwirq; 413 414 dev_dbg(port->pcie->dev, "msi#%d address_hi %#x address_lo %#x\n", 415 (int)data->hwirq, msg->address_hi, msg->address_lo); 416 } 417 418 static void mtk_msi_ack_irq(struct irq_data *data) 419 { 420 struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); 421 u32 hwirq = data->hwirq; 422 423 writel(1 << hwirq, port->base + PCIE_IMSI_STATUS); 424 } 425 426 static struct irq_chip mtk_msi_bottom_irq_chip = { 427 .name = "MTK MSI", 428 .irq_compose_msi_msg = mtk_compose_msi_msg, 429 .irq_ack = mtk_msi_ack_irq, 430 }; 431 432 static int mtk_pcie_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, 433 unsigned int nr_irqs, void *args) 434 { 435 struct mtk_pcie_port *port = domain->host_data; 436 unsigned long bit; 437 438 WARN_ON(nr_irqs != 1); 439 mutex_lock(&port->lock); 440 441 bit = find_first_zero_bit(port->msi_irq_in_use, MTK_MSI_IRQS_NUM); 442 if (bit >= MTK_MSI_IRQS_NUM) { 443 mutex_unlock(&port->lock); 444 return -ENOSPC; 445 } 446 447 __set_bit(bit, port->msi_irq_in_use); 448 449 mutex_unlock(&port->lock); 450 451 irq_domain_set_info(domain, virq, bit, &mtk_msi_bottom_irq_chip, 452 domain->host_data, handle_edge_irq, 453 NULL, NULL); 454 455 return 0; 456 } 457 458 static void mtk_pcie_irq_domain_free(struct irq_domain *domain, 459 unsigned int virq, unsigned int nr_irqs) 460 { 461 struct irq_data *d = irq_domain_get_irq_data(domain, virq); 462 struct mtk_pcie_port *port = irq_data_get_irq_chip_data(d); 463 464 mutex_lock(&port->lock); 465 466 if (!test_bit(d->hwirq, port->msi_irq_in_use)) 467 dev_err(port->pcie->dev, "trying to free unused MSI#%lu\n", 468 d->hwirq); 469 else 470 __clear_bit(d->hwirq, port->msi_irq_in_use); 471 472 mutex_unlock(&port->lock); 473 474 irq_domain_free_irqs_parent(domain, virq, nr_irqs); 475 } 476 477 static const struct irq_domain_ops msi_domain_ops = { 478 .alloc = mtk_pcie_irq_domain_alloc, 479 .free = mtk_pcie_irq_domain_free, 480 }; 481 482 #define MTK_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \ 483 MSI_FLAG_USE_DEF_CHIP_OPS | \ 484 MSI_FLAG_NO_AFFINITY) 485 486 #define MTK_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK | \ 487 MSI_FLAG_PCI_MSIX) 488 489 static const struct msi_parent_ops mtk_msi_parent_ops = { 490 .required_flags = MTK_MSI_FLAGS_REQUIRED, 491 .supported_flags = MTK_MSI_FLAGS_SUPPORTED, 492 .bus_select_token = DOMAIN_BUS_PCI_MSI, 493 .chip_flags = MSI_CHIP_FLAG_SET_ACK, 494 .prefix = "MTK-", 495 .init_dev_msi_info = msi_lib_init_dev_msi_info, 496 }; 497 498 static int mtk_pcie_allocate_msi_domains(struct mtk_pcie_port *port) 499 { 500 mutex_init(&port->lock); 501 502 struct irq_domain_info info = { 503 .fwnode = dev_fwnode(port->pcie->dev), 504 .ops = &msi_domain_ops, 505 .host_data = port, 506 .size = MTK_MSI_IRQS_NUM, 507 }; 508 509 port->inner_domain = msi_create_parent_irq_domain(&info, &mtk_msi_parent_ops); 510 if (!port->inner_domain) { 511 dev_err(port->pcie->dev, "failed to create IRQ domain\n"); 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->inner_domain) 544 irq_domain_remove(port->inner_domain); 545 } 546 547 irq_dispose_mapping(port->irq); 548 } 549 } 550 551 static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq, 552 irq_hw_number_t hwirq) 553 { 554 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq); 555 irq_set_chip_data(irq, domain->host_data); 556 557 return 0; 558 } 559 560 static const struct irq_domain_ops intx_domain_ops = { 561 .map = mtk_pcie_intx_map, 562 }; 563 564 static int mtk_pcie_init_irq_domain(struct mtk_pcie_port *port, 565 struct device_node *node) 566 { 567 struct device *dev = port->pcie->dev; 568 struct device_node *pcie_intc_node; 569 int ret; 570 571 /* Setup INTx */ 572 pcie_intc_node = of_get_next_child(node, NULL); 573 if (!pcie_intc_node) { 574 dev_err(dev, "no PCIe Intc node found\n"); 575 return -ENODEV; 576 } 577 578 port->irq_domain = irq_domain_create_linear(of_fwnode_handle(pcie_intc_node), PCI_NUM_INTX, 579 &intx_domain_ops, port); 580 of_node_put(pcie_intc_node); 581 if (!port->irq_domain) { 582 dev_err(dev, "failed to get INTx IRQ domain\n"); 583 return -ENODEV; 584 } 585 586 if (IS_ENABLED(CONFIG_PCI_MSI)) { 587 ret = mtk_pcie_allocate_msi_domains(port); 588 if (ret) { 589 irq_domain_remove(port->irq_domain); 590 return ret; 591 } 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 /* 621 * The interrupt status can be cleared even if the 622 * MSI status remains pending. As such, given the 623 * edge-triggered interrupt type, its status should 624 * be cleared before being dispatched to the 625 * handler of the underlying device. 626 */ 627 writel(MSI_STATUS, port->base + PCIE_INT_STATUS); 628 while ((imsi_status = readl(port->base + PCIE_IMSI_STATUS))) { 629 for_each_set_bit(bit, &imsi_status, MTK_MSI_IRQS_NUM) 630 generic_handle_domain_irq(port->inner_domain, bit); 631 } 632 } 633 } 634 635 chained_irq_exit(irqchip, desc); 636 } 637 638 static int mtk_pcie_setup_irq(struct mtk_pcie_port *port, 639 struct device_node *node) 640 { 641 struct mtk_pcie *pcie = port->pcie; 642 struct device *dev = pcie->dev; 643 struct platform_device *pdev = to_platform_device(dev); 644 int err; 645 646 err = mtk_pcie_init_irq_domain(port, node); 647 if (err) { 648 dev_err(dev, "failed to init PCIe IRQ domain\n"); 649 return err; 650 } 651 652 if (of_property_present(dev->of_node, "interrupt-names")) 653 port->irq = platform_get_irq_byname(pdev, "pcie_irq"); 654 else 655 port->irq = platform_get_irq(pdev, port->slot); 656 657 if (port->irq < 0) 658 return port->irq; 659 660 irq_set_chained_handler_and_data(port->irq, 661 mtk_pcie_intr_handler, port); 662 663 return 0; 664 } 665 666 static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) 667 { 668 struct mtk_pcie *pcie = port->pcie; 669 struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); 670 struct resource *mem = NULL; 671 struct resource_entry *entry; 672 const struct mtk_pcie_soc *soc = port->pcie->soc; 673 u32 val; 674 int err; 675 676 entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); 677 if (entry) 678 mem = entry->res; 679 if (!mem) 680 return -EINVAL; 681 682 /* MT7622 platforms need to enable LTSSM and ASPM from PCIe subsys */ 683 if (pcie->base) { 684 val = readl(pcie->base + PCIE_SYS_CFG_V2); 685 val |= PCIE_CSR_LTSSM_EN(port->slot) | 686 PCIE_CSR_ASPM_L1_EN(port->slot); 687 writel(val, pcie->base + PCIE_SYS_CFG_V2); 688 } else if (pcie->cfg) { 689 val = PCIE_CSR_LTSSM_EN(port->slot) | 690 PCIE_CSR_ASPM_L1_EN(port->slot); 691 regmap_update_bits(pcie->cfg, PCIE_SYS_CFG_V2, val, val); 692 } 693 694 if (!(soc->quirks & MTK_PCIE_SKIP_RSTB)) { 695 /* Assert all reset signals */ 696 writel(0, port->base + PCIE_RST_CTRL); 697 698 /* 699 * Enable PCIe link down reset, if link status changed from 700 * link up to link down, this will reset MAC control registers 701 * and configuration space. 702 */ 703 writel(PCIE_LINKDOWN_RST_EN, port->base + PCIE_RST_CTRL); 704 705 msleep(PCIE_T_PVPERL_MS); 706 707 /* De-assert PHY, PE, PIPE, MAC and configuration reset */ 708 val = readl(port->base + PCIE_RST_CTRL); 709 val |= PCIE_PHY_RSTB | PCIE_PERSTB | PCIE_PIPE_SRSTB | 710 PCIE_MAC_SRSTB | PCIE_CRSTB; 711 writel(val, port->base + PCIE_RST_CTRL); 712 } 713 714 /* Set up vendor ID and class code */ 715 if (soc->quirks & MTK_PCIE_FIX_CLASS_ID) { 716 val = PCI_VENDOR_ID_MEDIATEK; 717 writew(val, port->base + PCIE_CONF_VEND_ID); 718 719 val = PCI_CLASS_BRIDGE_PCI; 720 writew(val, port->base + PCIE_CONF_CLASS_ID); 721 } 722 723 if (soc->quirks & MTK_PCIE_FIX_DEVICE_ID) 724 writew(soc->device_id, port->base + PCIE_CONF_DEVICE_ID); 725 726 /* 100ms timeout value should be enough for Gen1/2 training */ 727 err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_V2, val, 728 !!(val & PCIE_PORT_LINKUP_V2), 20, 729 100 * USEC_PER_MSEC); 730 if (err) 731 return -ETIMEDOUT; 732 733 /* Set INTx mask */ 734 val = readl(port->base + PCIE_INT_MASK); 735 val &= ~INTX_MASK; 736 writel(val, port->base + PCIE_INT_MASK); 737 738 if (IS_ENABLED(CONFIG_PCI_MSI)) 739 mtk_pcie_enable_msi(port); 740 741 /* Set AHB to PCIe translation windows */ 742 val = lower_32_bits(mem->start) | 743 AHB2PCIE_SIZE(fls(resource_size(mem))); 744 writel(val, port->base + PCIE_AHB_TRANS_BASE0_L); 745 746 val = upper_32_bits(mem->start); 747 writel(val, port->base + PCIE_AHB_TRANS_BASE0_H); 748 749 /* Set PCIe to AXI translation memory space.*/ 750 val = PCIE2AHB_SIZE | WIN_ENABLE; 751 writel(val, port->base + PCIE_AXI_WINDOW0); 752 753 return 0; 754 } 755 756 static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus, 757 unsigned int devfn, int where) 758 { 759 struct mtk_pcie *pcie = bus->sysdata; 760 761 writel(PCIE_CONF_ADDR(where, PCI_FUNC(devfn), PCI_SLOT(devfn), 762 bus->number), pcie->base + PCIE_CFG_ADDR); 763 764 return pcie->base + PCIE_CFG_DATA + (where & 3); 765 } 766 767 static struct pci_ops mtk_pcie_ops = { 768 .map_bus = mtk_pcie_map_bus, 769 .read = pci_generic_config_read, 770 .write = pci_generic_config_write, 771 }; 772 773 static int mtk_pcie_startup_port(struct mtk_pcie_port *port) 774 { 775 struct mtk_pcie *pcie = port->pcie; 776 u32 func = PCI_FUNC(port->slot); 777 u32 slot = PCI_SLOT(port->slot << 3); 778 u32 val; 779 int err; 780 781 /* assert port PERST_N */ 782 val = readl(pcie->base + PCIE_SYS_CFG); 783 val |= PCIE_PORT_PERST(port->slot); 784 writel(val, pcie->base + PCIE_SYS_CFG); 785 786 /* de-assert port PERST_N */ 787 val = readl(pcie->base + PCIE_SYS_CFG); 788 val &= ~PCIE_PORT_PERST(port->slot); 789 writel(val, pcie->base + PCIE_SYS_CFG); 790 791 /* 100ms timeout value should be enough for Gen1/2 training */ 792 err = readl_poll_timeout(port->base + PCIE_LINK_STATUS, val, 793 !!(val & PCIE_PORT_LINKUP), 20, 794 100 * USEC_PER_MSEC); 795 if (err) 796 return -ETIMEDOUT; 797 798 /* enable interrupt */ 799 val = readl(pcie->base + PCIE_INT_ENABLE); 800 val |= PCIE_PORT_INT_EN(port->slot); 801 writel(val, pcie->base + PCIE_INT_ENABLE); 802 803 /* map to all DDR region. We need to set it before cfg operation. */ 804 writel(PCIE_BAR_MAP_MAX | PCIE_BAR_ENABLE, 805 port->base + PCIE_BAR0_SETUP); 806 807 /* configure class code and revision ID */ 808 writel(PCIE_CLASS_CODE | PCIE_REVISION_ID, port->base + PCIE_CLASS); 809 810 /* configure FC credit */ 811 writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0), 812 pcie->base + PCIE_CFG_ADDR); 813 val = readl(pcie->base + PCIE_CFG_DATA); 814 val &= ~PCIE_FC_CREDIT_MASK; 815 val |= PCIE_FC_CREDIT_VAL(0x806c); 816 writel(PCIE_CONF_ADDR(PCIE_FC_CREDIT, func, slot, 0), 817 pcie->base + PCIE_CFG_ADDR); 818 writel(val, pcie->base + PCIE_CFG_DATA); 819 820 /* configure RC FTS number to 250 when it leaves L0s */ 821 writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0), 822 pcie->base + PCIE_CFG_ADDR); 823 val = readl(pcie->base + PCIE_CFG_DATA); 824 val &= ~PCIE_FTS_NUM_MASK; 825 val |= PCIE_FTS_NUM_L0(0x50); 826 writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0), 827 pcie->base + PCIE_CFG_ADDR); 828 writel(val, pcie->base + PCIE_CFG_DATA); 829 830 return 0; 831 } 832 833 static int mtk_pcie_startup_port_an7583(struct mtk_pcie_port *port) 834 { 835 struct mtk_pcie *pcie = port->pcie; 836 struct device *dev = pcie->dev; 837 struct pci_host_bridge *host; 838 struct resource_entry *entry; 839 struct regmap *pbus_regmap; 840 resource_size_t addr; 841 u32 args[2], size; 842 843 /* 844 * Configure PBus base address and base address mask to allow 845 * the hw to detect if a given address is accessible on PCIe 846 * controller. 847 */ 848 pbus_regmap = syscon_regmap_lookup_by_phandle_args(dev->of_node, 849 "mediatek,pbus-csr", 850 ARRAY_SIZE(args), 851 args); 852 if (IS_ERR(pbus_regmap)) 853 return PTR_ERR(pbus_regmap); 854 855 host = pci_host_bridge_from_priv(pcie); 856 entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); 857 if (!entry) 858 return -ENODEV; 859 860 addr = entry->res->start - entry->offset; 861 regmap_write(pbus_regmap, args[0], lower_32_bits(addr)); 862 size = lower_32_bits(resource_size(entry->res)); 863 regmap_write(pbus_regmap, args[1], GENMASK(31, __fls(size))); 864 865 return mtk_pcie_startup_port_v2(port); 866 } 867 868 static void mtk_pcie_enable_port(struct mtk_pcie_port *port) 869 { 870 struct mtk_pcie *pcie = port->pcie; 871 struct device *dev = pcie->dev; 872 int err; 873 874 err = clk_prepare_enable(port->sys_ck); 875 if (err) { 876 dev_err(dev, "failed to enable sys_ck%d clock\n", port->slot); 877 goto err_sys_clk; 878 } 879 880 err = clk_prepare_enable(port->ahb_ck); 881 if (err) { 882 dev_err(dev, "failed to enable ahb_ck%d\n", port->slot); 883 goto err_ahb_clk; 884 } 885 886 err = clk_prepare_enable(port->aux_ck); 887 if (err) { 888 dev_err(dev, "failed to enable aux_ck%d\n", port->slot); 889 goto err_aux_clk; 890 } 891 892 err = clk_prepare_enable(port->axi_ck); 893 if (err) { 894 dev_err(dev, "failed to enable axi_ck%d\n", port->slot); 895 goto err_axi_clk; 896 } 897 898 err = clk_prepare_enable(port->obff_ck); 899 if (err) { 900 dev_err(dev, "failed to enable obff_ck%d\n", port->slot); 901 goto err_obff_clk; 902 } 903 904 err = clk_prepare_enable(port->pipe_ck); 905 if (err) { 906 dev_err(dev, "failed to enable pipe_ck%d\n", port->slot); 907 goto err_pipe_clk; 908 } 909 910 reset_control_assert(port->reset); 911 reset_control_deassert(port->reset); 912 913 err = phy_init(port->phy); 914 if (err) { 915 dev_err(dev, "failed to initialize port%d phy\n", port->slot); 916 goto err_phy_init; 917 } 918 919 err = phy_power_on(port->phy); 920 if (err) { 921 dev_err(dev, "failed to power on port%d phy\n", port->slot); 922 goto err_phy_on; 923 } 924 925 if (!pcie->soc->startup(port)) 926 return; 927 928 dev_info(dev, "Port%d link down\n", port->slot); 929 930 phy_power_off(port->phy); 931 err_phy_on: 932 phy_exit(port->phy); 933 err_phy_init: 934 clk_disable_unprepare(port->pipe_ck); 935 err_pipe_clk: 936 clk_disable_unprepare(port->obff_ck); 937 err_obff_clk: 938 clk_disable_unprepare(port->axi_ck); 939 err_axi_clk: 940 clk_disable_unprepare(port->aux_ck); 941 err_aux_clk: 942 clk_disable_unprepare(port->ahb_ck); 943 err_ahb_clk: 944 clk_disable_unprepare(port->sys_ck); 945 err_sys_clk: 946 mtk_pcie_port_free(port); 947 } 948 949 static int mtk_pcie_parse_port(struct mtk_pcie *pcie, 950 struct device_node *node, 951 int slot) 952 { 953 struct mtk_pcie_port *port; 954 struct device *dev = pcie->dev; 955 struct platform_device *pdev = to_platform_device(dev); 956 char name[10]; 957 int err; 958 959 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 960 if (!port) 961 return -ENOMEM; 962 963 snprintf(name, sizeof(name), "port%d", slot); 964 port->base = devm_platform_ioremap_resource_byname(pdev, name); 965 if (IS_ERR(port->base)) { 966 dev_err(dev, "failed to map port%d base\n", slot); 967 return PTR_ERR(port->base); 968 } 969 970 snprintf(name, sizeof(name), "sys_ck%d", slot); 971 port->sys_ck = devm_clk_get(dev, name); 972 if (IS_ERR(port->sys_ck)) { 973 dev_err(dev, "failed to get sys_ck%d clock\n", slot); 974 return PTR_ERR(port->sys_ck); 975 } 976 977 /* sys_ck might be divided into the following parts in some chips */ 978 snprintf(name, sizeof(name), "ahb_ck%d", slot); 979 port->ahb_ck = devm_clk_get_optional(dev, name); 980 if (IS_ERR(port->ahb_ck)) 981 return PTR_ERR(port->ahb_ck); 982 983 snprintf(name, sizeof(name), "axi_ck%d", slot); 984 port->axi_ck = devm_clk_get_optional(dev, name); 985 if (IS_ERR(port->axi_ck)) 986 return PTR_ERR(port->axi_ck); 987 988 snprintf(name, sizeof(name), "aux_ck%d", slot); 989 port->aux_ck = devm_clk_get_optional(dev, name); 990 if (IS_ERR(port->aux_ck)) 991 return PTR_ERR(port->aux_ck); 992 993 snprintf(name, sizeof(name), "obff_ck%d", slot); 994 port->obff_ck = devm_clk_get_optional(dev, name); 995 if (IS_ERR(port->obff_ck)) 996 return PTR_ERR(port->obff_ck); 997 998 snprintf(name, sizeof(name), "pipe_ck%d", slot); 999 port->pipe_ck = devm_clk_get_optional(dev, name); 1000 if (IS_ERR(port->pipe_ck)) 1001 return PTR_ERR(port->pipe_ck); 1002 1003 snprintf(name, sizeof(name), "pcie-rst%d", slot); 1004 port->reset = devm_reset_control_get_optional_exclusive(dev, name); 1005 if (PTR_ERR(port->reset) == -EPROBE_DEFER) 1006 return PTR_ERR(port->reset); 1007 1008 /* some platforms may use default PHY setting */ 1009 snprintf(name, sizeof(name), "pcie-phy%d", slot); 1010 port->phy = devm_phy_optional_get(dev, name); 1011 if (IS_ERR(port->phy)) 1012 return PTR_ERR(port->phy); 1013 1014 port->slot = slot; 1015 port->pcie = pcie; 1016 1017 if (pcie->soc->setup_irq) { 1018 err = pcie->soc->setup_irq(port, node); 1019 if (err) 1020 return err; 1021 } 1022 1023 INIT_LIST_HEAD(&port->list); 1024 list_add_tail(&port->list, &pcie->ports); 1025 1026 return 0; 1027 } 1028 1029 static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie) 1030 { 1031 struct device *dev = pcie->dev; 1032 struct platform_device *pdev = to_platform_device(dev); 1033 struct resource *regs; 1034 struct device_node *cfg_node; 1035 int err; 1036 1037 /* get shared registers, which are optional */ 1038 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "subsys"); 1039 if (regs) { 1040 pcie->base = devm_ioremap_resource(dev, regs); 1041 if (IS_ERR(pcie->base)) 1042 return PTR_ERR(pcie->base); 1043 } 1044 1045 cfg_node = of_find_compatible_node(NULL, NULL, 1046 "mediatek,generic-pciecfg"); 1047 if (cfg_node) { 1048 pcie->cfg = syscon_node_to_regmap(cfg_node); 1049 of_node_put(cfg_node); 1050 if (IS_ERR(pcie->cfg)) 1051 return PTR_ERR(pcie->cfg); 1052 } 1053 1054 pcie->free_ck = devm_clk_get(dev, "free_ck"); 1055 if (IS_ERR(pcie->free_ck)) { 1056 if (PTR_ERR(pcie->free_ck) == -EPROBE_DEFER) 1057 return -EPROBE_DEFER; 1058 1059 pcie->free_ck = NULL; 1060 } 1061 1062 pm_runtime_enable(dev); 1063 pm_runtime_get_sync(dev); 1064 1065 /* enable top level clock */ 1066 err = clk_prepare_enable(pcie->free_ck); 1067 if (err) { 1068 dev_err(dev, "failed to enable free_ck\n"); 1069 goto err_free_ck; 1070 } 1071 1072 return 0; 1073 1074 err_free_ck: 1075 pm_runtime_put_sync(dev); 1076 pm_runtime_disable(dev); 1077 1078 return err; 1079 } 1080 1081 static int mtk_pcie_setup(struct mtk_pcie *pcie) 1082 { 1083 struct device *dev = pcie->dev; 1084 struct device_node *node = dev->of_node; 1085 struct mtk_pcie_port *port, *tmp; 1086 int err, slot; 1087 1088 slot = of_get_pci_domain_nr(dev->of_node); 1089 if (slot < 0) { 1090 for_each_available_child_of_node_scoped(node, child) { 1091 err = of_pci_get_devfn(child); 1092 if (err < 0) 1093 return dev_err_probe(dev, err, "failed to get devfn\n"); 1094 1095 slot = PCI_SLOT(err); 1096 1097 err = mtk_pcie_parse_port(pcie, child, slot); 1098 if (err) 1099 return err; 1100 } 1101 } else { 1102 err = mtk_pcie_parse_port(pcie, node, slot); 1103 if (err) 1104 return err; 1105 } 1106 1107 err = mtk_pcie_subsys_powerup(pcie); 1108 if (err) 1109 return err; 1110 1111 /* enable each port, and then check link status */ 1112 list_for_each_entry_safe(port, tmp, &pcie->ports, list) 1113 mtk_pcie_enable_port(port); 1114 1115 /* power down PCIe subsys if slots are all empty (link down) */ 1116 if (list_empty(&pcie->ports)) 1117 mtk_pcie_subsys_powerdown(pcie); 1118 1119 return 0; 1120 } 1121 1122 static int mtk_pcie_probe(struct platform_device *pdev) 1123 { 1124 struct device *dev = &pdev->dev; 1125 struct mtk_pcie *pcie; 1126 struct pci_host_bridge *host; 1127 int err; 1128 1129 host = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); 1130 if (!host) 1131 return -ENOMEM; 1132 1133 pcie = pci_host_bridge_priv(host); 1134 1135 pcie->dev = dev; 1136 pcie->soc = of_device_get_match_data(dev); 1137 platform_set_drvdata(pdev, pcie); 1138 INIT_LIST_HEAD(&pcie->ports); 1139 1140 err = mtk_pcie_setup(pcie); 1141 if (err) 1142 return err; 1143 1144 host->ops = pcie->soc->ops; 1145 host->sysdata = pcie; 1146 host->msi_domain = !!(pcie->soc->quirks & MTK_PCIE_NO_MSI); 1147 1148 err = pci_host_probe(host); 1149 if (err) 1150 goto put_resources; 1151 1152 return 0; 1153 1154 put_resources: 1155 if (!list_empty(&pcie->ports)) 1156 mtk_pcie_put_resources(pcie); 1157 1158 return err; 1159 } 1160 1161 1162 static void mtk_pcie_free_resources(struct mtk_pcie *pcie) 1163 { 1164 struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); 1165 struct list_head *windows = &host->windows; 1166 1167 pci_free_resource_list(windows); 1168 } 1169 1170 static void mtk_pcie_remove(struct platform_device *pdev) 1171 { 1172 struct mtk_pcie *pcie = platform_get_drvdata(pdev); 1173 struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); 1174 1175 pci_stop_root_bus(host->bus); 1176 pci_remove_root_bus(host->bus); 1177 mtk_pcie_free_resources(pcie); 1178 1179 mtk_pcie_irq_teardown(pcie); 1180 1181 mtk_pcie_put_resources(pcie); 1182 } 1183 1184 static int mtk_pcie_suspend_noirq(struct device *dev) 1185 { 1186 struct mtk_pcie *pcie = dev_get_drvdata(dev); 1187 struct mtk_pcie_port *port; 1188 1189 if (list_empty(&pcie->ports)) 1190 return 0; 1191 1192 list_for_each_entry(port, &pcie->ports, list) { 1193 clk_disable_unprepare(port->pipe_ck); 1194 clk_disable_unprepare(port->obff_ck); 1195 clk_disable_unprepare(port->axi_ck); 1196 clk_disable_unprepare(port->aux_ck); 1197 clk_disable_unprepare(port->ahb_ck); 1198 clk_disable_unprepare(port->sys_ck); 1199 phy_power_off(port->phy); 1200 phy_exit(port->phy); 1201 } 1202 1203 clk_disable_unprepare(pcie->free_ck); 1204 1205 return 0; 1206 } 1207 1208 static int mtk_pcie_resume_noirq(struct device *dev) 1209 { 1210 struct mtk_pcie *pcie = dev_get_drvdata(dev); 1211 struct mtk_pcie_port *port, *tmp; 1212 1213 if (list_empty(&pcie->ports)) 1214 return 0; 1215 1216 clk_prepare_enable(pcie->free_ck); 1217 1218 list_for_each_entry_safe(port, tmp, &pcie->ports, list) 1219 mtk_pcie_enable_port(port); 1220 1221 /* In case of EP was removed while system suspend. */ 1222 if (list_empty(&pcie->ports)) 1223 clk_disable_unprepare(pcie->free_ck); 1224 1225 return 0; 1226 } 1227 1228 static const struct dev_pm_ops mtk_pcie_pm_ops = { 1229 NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_pcie_suspend_noirq, 1230 mtk_pcie_resume_noirq) 1231 }; 1232 1233 static const struct mtk_pcie_soc mtk_pcie_soc_v1 = { 1234 .ops = &mtk_pcie_ops, 1235 .startup = mtk_pcie_startup_port, 1236 .quirks = MTK_PCIE_NO_MSI, 1237 }; 1238 1239 static const struct mtk_pcie_soc mtk_pcie_soc_mt2712 = { 1240 .ops = &mtk_pcie_ops_v2, 1241 .startup = mtk_pcie_startup_port_v2, 1242 .setup_irq = mtk_pcie_setup_irq, 1243 }; 1244 1245 static const struct mtk_pcie_soc mtk_pcie_soc_mt7622 = { 1246 .ops = &mtk_pcie_ops_v2, 1247 .startup = mtk_pcie_startup_port_v2, 1248 .setup_irq = mtk_pcie_setup_irq, 1249 .quirks = MTK_PCIE_FIX_CLASS_ID, 1250 }; 1251 1252 static const struct mtk_pcie_soc mtk_pcie_soc_an7583 = { 1253 .ops = &mtk_pcie_ops_v2, 1254 .startup = mtk_pcie_startup_port_an7583, 1255 .setup_irq = mtk_pcie_setup_irq, 1256 .quirks = MTK_PCIE_FIX_CLASS_ID | MTK_PCIE_SKIP_RSTB, 1257 }; 1258 1259 static const struct mtk_pcie_soc mtk_pcie_soc_mt7629 = { 1260 .device_id = PCI_DEVICE_ID_MEDIATEK_7629, 1261 .ops = &mtk_pcie_ops_v2, 1262 .startup = mtk_pcie_startup_port_v2, 1263 .setup_irq = mtk_pcie_setup_irq, 1264 .quirks = MTK_PCIE_FIX_CLASS_ID | MTK_PCIE_FIX_DEVICE_ID, 1265 }; 1266 1267 static const struct of_device_id mtk_pcie_ids[] = { 1268 { .compatible = "airoha,an7583-pcie", .data = &mtk_pcie_soc_an7583 }, 1269 { .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 }, 1270 { .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 }, 1271 { .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_mt2712 }, 1272 { .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_mt7622 }, 1273 { .compatible = "mediatek,mt7629-pcie", .data = &mtk_pcie_soc_mt7629 }, 1274 {}, 1275 }; 1276 MODULE_DEVICE_TABLE(of, mtk_pcie_ids); 1277 1278 static struct platform_driver mtk_pcie_driver = { 1279 .probe = mtk_pcie_probe, 1280 .remove = mtk_pcie_remove, 1281 .driver = { 1282 .name = "mtk-pcie", 1283 .of_match_table = mtk_pcie_ids, 1284 .suppress_bind_attrs = true, 1285 .pm = &mtk_pcie_pm_ops, 1286 }, 1287 }; 1288 module_platform_driver(mtk_pcie_driver); 1289 MODULE_DESCRIPTION("MediaTek PCIe host controller driver"); 1290 MODULE_LICENSE("GPL v2"); 1291