1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * MediaTek xHCI Host Controller Driver 4 * 5 * Copyright (c) 2015 MediaTek Inc. 6 * Author: 7 * Chunfeng Yun <chunfeng.yun@mediatek.com> 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/dma-mapping.h> 12 #include <linux/iopoll.h> 13 #include <linux/kernel.h> 14 #include <linux/mfd/syscon.h> 15 #include <linux/module.h> 16 #include <linux/of.h> 17 #include <linux/platform_device.h> 18 #include <linux/pm_runtime.h> 19 #include <linux/regmap.h> 20 #include <linux/regulator/consumer.h> 21 22 #include "xhci.h" 23 #include "xhci-mtk.h" 24 25 /* ip_pw_ctrl0 register */ 26 #define CTRL0_IP_SW_RST BIT(0) 27 28 /* ip_pw_ctrl1 register */ 29 #define CTRL1_IP_HOST_PDN BIT(0) 30 31 /* ip_pw_ctrl2 register */ 32 #define CTRL2_IP_DEV_PDN BIT(0) 33 34 /* ip_pw_sts1 register */ 35 #define STS1_IP_SLEEP_STS BIT(30) 36 #define STS1_U3_MAC_RST BIT(16) 37 #define STS1_XHCI_RST BIT(11) 38 #define STS1_SYS125_RST BIT(10) 39 #define STS1_REF_RST BIT(8) 40 #define STS1_SYSPLL_STABLE BIT(0) 41 42 /* ip_xhci_cap register */ 43 #define CAP_U3_PORT_NUM(p) ((p) & 0xff) 44 #define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff) 45 46 /* u3_ctrl_p register */ 47 #define CTRL_U3_PORT_HOST_SEL BIT(2) 48 #define CTRL_U3_PORT_PDN BIT(1) 49 #define CTRL_U3_PORT_DIS BIT(0) 50 51 /* u2_ctrl_p register */ 52 #define CTRL_U2_PORT_HOST_SEL BIT(2) 53 #define CTRL_U2_PORT_PDN BIT(1) 54 #define CTRL_U2_PORT_DIS BIT(0) 55 56 /* u2_phy_pll register */ 57 #define CTRL_U2_FORCE_PLL_STB BIT(28) 58 59 /* usb remote wakeup registers in syscon */ 60 /* mt8173 etc */ 61 #define PERI_WK_CTRL1 0x4 62 #define WC1_IS_C(x) (((x) & 0xf) << 26) /* cycle debounce */ 63 #define WC1_IS_EN BIT(25) 64 #define WC1_IS_P BIT(6) /* polarity for ip sleep */ 65 66 /* mt2712 etc */ 67 #define PERI_SSUSB_SPM_CTRL 0x0 68 #define SSC_IP_SLEEP_EN BIT(4) 69 #define SSC_SPM_INT_EN BIT(1) 70 71 enum ssusb_uwk_vers { 72 SSUSB_UWK_V1 = 1, 73 SSUSB_UWK_V2, 74 }; 75 76 static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk) 77 { 78 struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs; 79 u32 value, check_val; 80 int u3_ports_disabled = 0; 81 int ret; 82 int i; 83 84 if (!mtk->has_ippc) 85 return 0; 86 87 /* power on host ip */ 88 value = readl(&ippc->ip_pw_ctr1); 89 value &= ~CTRL1_IP_HOST_PDN; 90 writel(value, &ippc->ip_pw_ctr1); 91 92 /* power on and enable u3 ports except skipped ones */ 93 for (i = 0; i < mtk->num_u3_ports; i++) { 94 if ((0x1 << i) & mtk->u3p_dis_msk) { 95 u3_ports_disabled++; 96 continue; 97 } 98 99 value = readl(&ippc->u3_ctrl_p[i]); 100 value &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS); 101 value |= CTRL_U3_PORT_HOST_SEL; 102 writel(value, &ippc->u3_ctrl_p[i]); 103 } 104 105 /* power on and enable all u2 ports */ 106 for (i = 0; i < mtk->num_u2_ports; i++) { 107 value = readl(&ippc->u2_ctrl_p[i]); 108 value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS); 109 value |= CTRL_U2_PORT_HOST_SEL; 110 writel(value, &ippc->u2_ctrl_p[i]); 111 } 112 113 /* 114 * wait for clocks to be stable, and clock domains reset to 115 * be inactive after power on and enable ports 116 */ 117 check_val = STS1_SYSPLL_STABLE | STS1_REF_RST | 118 STS1_SYS125_RST | STS1_XHCI_RST; 119 120 if (mtk->num_u3_ports > u3_ports_disabled) 121 check_val |= STS1_U3_MAC_RST; 122 123 ret = readl_poll_timeout(&ippc->ip_pw_sts1, value, 124 (check_val == (value & check_val)), 100, 20000); 125 if (ret) { 126 dev_err(mtk->dev, "clocks are not stable (0x%x)\n", value); 127 return ret; 128 } 129 130 return 0; 131 } 132 133 static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk) 134 { 135 struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs; 136 u32 value; 137 int ret; 138 int i; 139 140 if (!mtk->has_ippc) 141 return 0; 142 143 /* power down u3 ports except skipped ones */ 144 for (i = 0; i < mtk->num_u3_ports; i++) { 145 if ((0x1 << i) & mtk->u3p_dis_msk) 146 continue; 147 148 value = readl(&ippc->u3_ctrl_p[i]); 149 value |= CTRL_U3_PORT_PDN; 150 writel(value, &ippc->u3_ctrl_p[i]); 151 } 152 153 /* power down all u2 ports */ 154 for (i = 0; i < mtk->num_u2_ports; i++) { 155 value = readl(&ippc->u2_ctrl_p[i]); 156 value |= CTRL_U2_PORT_PDN; 157 writel(value, &ippc->u2_ctrl_p[i]); 158 } 159 160 /* power down host ip */ 161 value = readl(&ippc->ip_pw_ctr1); 162 value |= CTRL1_IP_HOST_PDN; 163 writel(value, &ippc->ip_pw_ctr1); 164 165 /* wait for host ip to sleep */ 166 ret = readl_poll_timeout(&ippc->ip_pw_sts1, value, 167 (value & STS1_IP_SLEEP_STS), 100, 100000); 168 if (ret) { 169 dev_err(mtk->dev, "ip sleep failed!!!\n"); 170 return ret; 171 } 172 return 0; 173 } 174 175 static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk) 176 { 177 struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs; 178 u32 value; 179 180 if (!mtk->has_ippc) 181 return 0; 182 183 /* reset whole ip */ 184 value = readl(&ippc->ip_pw_ctr0); 185 value |= CTRL0_IP_SW_RST; 186 writel(value, &ippc->ip_pw_ctr0); 187 udelay(1); 188 value = readl(&ippc->ip_pw_ctr0); 189 value &= ~CTRL0_IP_SW_RST; 190 writel(value, &ippc->ip_pw_ctr0); 191 192 /* 193 * device ip is default power-on in fact 194 * power down device ip, otherwise ip-sleep will fail 195 */ 196 value = readl(&ippc->ip_pw_ctr2); 197 value |= CTRL2_IP_DEV_PDN; 198 writel(value, &ippc->ip_pw_ctr2); 199 200 value = readl(&ippc->ip_xhci_cap); 201 mtk->num_u3_ports = CAP_U3_PORT_NUM(value); 202 mtk->num_u2_ports = CAP_U2_PORT_NUM(value); 203 dev_dbg(mtk->dev, "%s u2p:%d, u3p:%d\n", __func__, 204 mtk->num_u2_ports, mtk->num_u3_ports); 205 206 return xhci_mtk_host_enable(mtk); 207 } 208 209 static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk) 210 { 211 struct device *dev = mtk->dev; 212 213 mtk->sys_clk = devm_clk_get(dev, "sys_ck"); 214 if (IS_ERR(mtk->sys_clk)) { 215 dev_err(dev, "fail to get sys_ck\n"); 216 return PTR_ERR(mtk->sys_clk); 217 } 218 219 mtk->xhci_clk = devm_clk_get_optional(dev, "xhci_ck"); 220 if (IS_ERR(mtk->xhci_clk)) 221 return PTR_ERR(mtk->xhci_clk); 222 223 mtk->ref_clk = devm_clk_get_optional(dev, "ref_ck"); 224 if (IS_ERR(mtk->ref_clk)) 225 return PTR_ERR(mtk->ref_clk); 226 227 mtk->mcu_clk = devm_clk_get_optional(dev, "mcu_ck"); 228 if (IS_ERR(mtk->mcu_clk)) 229 return PTR_ERR(mtk->mcu_clk); 230 231 mtk->dma_clk = devm_clk_get_optional(dev, "dma_ck"); 232 return PTR_ERR_OR_ZERO(mtk->dma_clk); 233 } 234 235 static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk) 236 { 237 int ret; 238 239 ret = clk_prepare_enable(mtk->ref_clk); 240 if (ret) { 241 dev_err(mtk->dev, "failed to enable ref_clk\n"); 242 goto ref_clk_err; 243 } 244 245 ret = clk_prepare_enable(mtk->sys_clk); 246 if (ret) { 247 dev_err(mtk->dev, "failed to enable sys_clk\n"); 248 goto sys_clk_err; 249 } 250 251 ret = clk_prepare_enable(mtk->xhci_clk); 252 if (ret) { 253 dev_err(mtk->dev, "failed to enable xhci_clk\n"); 254 goto xhci_clk_err; 255 } 256 257 ret = clk_prepare_enable(mtk->mcu_clk); 258 if (ret) { 259 dev_err(mtk->dev, "failed to enable mcu_clk\n"); 260 goto mcu_clk_err; 261 } 262 263 ret = clk_prepare_enable(mtk->dma_clk); 264 if (ret) { 265 dev_err(mtk->dev, "failed to enable dma_clk\n"); 266 goto dma_clk_err; 267 } 268 269 return 0; 270 271 dma_clk_err: 272 clk_disable_unprepare(mtk->mcu_clk); 273 mcu_clk_err: 274 clk_disable_unprepare(mtk->xhci_clk); 275 xhci_clk_err: 276 clk_disable_unprepare(mtk->sys_clk); 277 sys_clk_err: 278 clk_disable_unprepare(mtk->ref_clk); 279 ref_clk_err: 280 return ret; 281 } 282 283 static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk) 284 { 285 clk_disable_unprepare(mtk->dma_clk); 286 clk_disable_unprepare(mtk->mcu_clk); 287 clk_disable_unprepare(mtk->xhci_clk); 288 clk_disable_unprepare(mtk->sys_clk); 289 clk_disable_unprepare(mtk->ref_clk); 290 } 291 292 /* only clocks can be turn off for ip-sleep wakeup mode */ 293 static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk *mtk, bool enable) 294 { 295 u32 reg, msk, val; 296 297 switch (mtk->uwk_vers) { 298 case SSUSB_UWK_V1: 299 reg = mtk->uwk_reg_base + PERI_WK_CTRL1; 300 msk = WC1_IS_EN | WC1_IS_C(0xf) | WC1_IS_P; 301 val = enable ? (WC1_IS_EN | WC1_IS_C(0x8)) : 0; 302 break; 303 case SSUSB_UWK_V2: 304 reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL; 305 msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN; 306 val = enable ? msk : 0; 307 break; 308 default: 309 return; 310 } 311 regmap_update_bits(mtk->uwk, reg, msk, val); 312 } 313 314 static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk, 315 struct device_node *dn) 316 { 317 struct of_phandle_args args; 318 int ret; 319 320 /* Wakeup function is optional */ 321 mtk->uwk_en = of_property_read_bool(dn, "wakeup-source"); 322 if (!mtk->uwk_en) 323 return 0; 324 325 ret = of_parse_phandle_with_fixed_args(dn, 326 "mediatek,syscon-wakeup", 2, 0, &args); 327 if (ret) 328 return ret; 329 330 mtk->uwk_reg_base = args.args[0]; 331 mtk->uwk_vers = args.args[1]; 332 mtk->uwk = syscon_node_to_regmap(args.np); 333 of_node_put(args.np); 334 dev_info(mtk->dev, "uwk - reg:0x%x, version:%d\n", 335 mtk->uwk_reg_base, mtk->uwk_vers); 336 337 return PTR_ERR_OR_ZERO(mtk->uwk); 338 339 } 340 341 static void usb_wakeup_set(struct xhci_hcd_mtk *mtk, bool enable) 342 { 343 if (mtk->uwk_en) 344 usb_wakeup_ip_sleep_set(mtk, enable); 345 } 346 347 static int xhci_mtk_setup(struct usb_hcd *hcd); 348 static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = { 349 .reset = xhci_mtk_setup, 350 }; 351 352 static struct hc_driver __read_mostly xhci_mtk_hc_driver; 353 354 static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk) 355 { 356 int ret; 357 358 ret = regulator_enable(mtk->vbus); 359 if (ret) { 360 dev_err(mtk->dev, "failed to enable vbus\n"); 361 return ret; 362 } 363 364 ret = regulator_enable(mtk->vusb33); 365 if (ret) { 366 dev_err(mtk->dev, "failed to enable vusb33\n"); 367 regulator_disable(mtk->vbus); 368 return ret; 369 } 370 return 0; 371 } 372 373 static void xhci_mtk_ldos_disable(struct xhci_hcd_mtk *mtk) 374 { 375 regulator_disable(mtk->vbus); 376 regulator_disable(mtk->vusb33); 377 } 378 379 static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci) 380 { 381 struct usb_hcd *hcd = xhci_to_hcd(xhci); 382 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd); 383 384 /* 385 * As of now platform drivers don't provide MSI support so we ensure 386 * here that the generic code does not try to make a pci_dev from our 387 * dev struct in order to setup MSI 388 */ 389 xhci->quirks |= XHCI_PLAT; 390 xhci->quirks |= XHCI_MTK_HOST; 391 /* 392 * MTK host controller gives a spurious successful event after a 393 * short transfer. Ignore it. 394 */ 395 xhci->quirks |= XHCI_SPURIOUS_SUCCESS; 396 if (mtk->lpm_support) 397 xhci->quirks |= XHCI_LPM_SUPPORT; 398 } 399 400 /* called during probe() after chip reset completes */ 401 static int xhci_mtk_setup(struct usb_hcd *hcd) 402 { 403 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd); 404 int ret; 405 406 if (usb_hcd_is_primary_hcd(hcd)) { 407 ret = xhci_mtk_ssusb_config(mtk); 408 if (ret) 409 return ret; 410 } 411 412 ret = xhci_gen_setup(hcd, xhci_mtk_quirks); 413 if (ret) 414 return ret; 415 416 if (usb_hcd_is_primary_hcd(hcd)) { 417 ret = xhci_mtk_sch_init(mtk); 418 if (ret) 419 return ret; 420 } 421 422 return ret; 423 } 424 425 static int xhci_mtk_probe(struct platform_device *pdev) 426 { 427 struct device *dev = &pdev->dev; 428 struct device_node *node = dev->of_node; 429 struct xhci_hcd_mtk *mtk; 430 const struct hc_driver *driver; 431 struct xhci_hcd *xhci; 432 struct resource *res; 433 struct usb_hcd *hcd; 434 int ret = -ENODEV; 435 int irq; 436 437 if (usb_disabled()) 438 return -ENODEV; 439 440 driver = &xhci_mtk_hc_driver; 441 mtk = devm_kzalloc(dev, sizeof(*mtk), GFP_KERNEL); 442 if (!mtk) 443 return -ENOMEM; 444 445 mtk->dev = dev; 446 mtk->vbus = devm_regulator_get(dev, "vbus"); 447 if (IS_ERR(mtk->vbus)) { 448 dev_err(dev, "fail to get vbus\n"); 449 return PTR_ERR(mtk->vbus); 450 } 451 452 mtk->vusb33 = devm_regulator_get(dev, "vusb33"); 453 if (IS_ERR(mtk->vusb33)) { 454 dev_err(dev, "fail to get vusb33\n"); 455 return PTR_ERR(mtk->vusb33); 456 } 457 458 ret = xhci_mtk_clks_get(mtk); 459 if (ret) 460 return ret; 461 462 mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable"); 463 /* optional property, ignore the error if it does not exist */ 464 of_property_read_u32(node, "mediatek,u3p-dis-msk", 465 &mtk->u3p_dis_msk); 466 467 ret = usb_wakeup_of_property_parse(mtk, node); 468 if (ret) { 469 dev_err(dev, "failed to parse uwk property\n"); 470 return ret; 471 } 472 473 pm_runtime_enable(dev); 474 pm_runtime_get_sync(dev); 475 device_enable_async_suspend(dev); 476 477 ret = xhci_mtk_ldos_enable(mtk); 478 if (ret) 479 goto disable_pm; 480 481 ret = xhci_mtk_clks_enable(mtk); 482 if (ret) 483 goto disable_ldos; 484 485 irq = platform_get_irq(pdev, 0); 486 if (irq < 0) { 487 ret = irq; 488 goto disable_clk; 489 } 490 491 hcd = usb_create_hcd(driver, dev, dev_name(dev)); 492 if (!hcd) { 493 ret = -ENOMEM; 494 goto disable_clk; 495 } 496 497 /* 498 * USB 2.0 roothub is stored in the platform_device. 499 * Swap it with mtk HCD. 500 */ 501 mtk->hcd = platform_get_drvdata(pdev); 502 platform_set_drvdata(pdev, mtk); 503 504 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac"); 505 hcd->regs = devm_ioremap_resource(dev, res); 506 if (IS_ERR(hcd->regs)) { 507 ret = PTR_ERR(hcd->regs); 508 goto put_usb2_hcd; 509 } 510 hcd->rsrc_start = res->start; 511 hcd->rsrc_len = resource_size(res); 512 513 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ippc"); 514 if (res) { /* ippc register is optional */ 515 mtk->ippc_regs = devm_ioremap_resource(dev, res); 516 if (IS_ERR(mtk->ippc_regs)) { 517 ret = PTR_ERR(mtk->ippc_regs); 518 goto put_usb2_hcd; 519 } 520 mtk->has_ippc = true; 521 } else { 522 mtk->has_ippc = false; 523 } 524 525 device_init_wakeup(dev, true); 526 527 xhci = hcd_to_xhci(hcd); 528 xhci->main_hcd = hcd; 529 530 /* 531 * imod_interval is the interrupt moderation value in nanoseconds. 532 * The increment interval is 8 times as much as that defined in 533 * the xHCI spec on MTK's controller. 534 */ 535 xhci->imod_interval = 5000; 536 device_property_read_u32(dev, "imod-interval-ns", &xhci->imod_interval); 537 538 xhci->shared_hcd = usb_create_shared_hcd(driver, dev, 539 dev_name(dev), hcd); 540 if (!xhci->shared_hcd) { 541 ret = -ENOMEM; 542 goto disable_device_wakeup; 543 } 544 545 ret = usb_add_hcd(hcd, irq, IRQF_SHARED); 546 if (ret) 547 goto put_usb3_hcd; 548 549 if (HCC_MAX_PSA(xhci->hcc_params) >= 4) 550 xhci->shared_hcd->can_do_streams = 1; 551 552 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); 553 if (ret) 554 goto dealloc_usb2_hcd; 555 556 return 0; 557 558 dealloc_usb2_hcd: 559 usb_remove_hcd(hcd); 560 561 put_usb3_hcd: 562 xhci_mtk_sch_exit(mtk); 563 usb_put_hcd(xhci->shared_hcd); 564 565 disable_device_wakeup: 566 device_init_wakeup(dev, false); 567 568 put_usb2_hcd: 569 usb_put_hcd(hcd); 570 571 disable_clk: 572 xhci_mtk_clks_disable(mtk); 573 574 disable_ldos: 575 xhci_mtk_ldos_disable(mtk); 576 577 disable_pm: 578 pm_runtime_put_sync(dev); 579 pm_runtime_disable(dev); 580 return ret; 581 } 582 583 static int xhci_mtk_remove(struct platform_device *dev) 584 { 585 struct xhci_hcd_mtk *mtk = platform_get_drvdata(dev); 586 struct usb_hcd *hcd = mtk->hcd; 587 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 588 struct usb_hcd *shared_hcd = xhci->shared_hcd; 589 590 pm_runtime_put_noidle(&dev->dev); 591 pm_runtime_disable(&dev->dev); 592 593 usb_remove_hcd(shared_hcd); 594 xhci->shared_hcd = NULL; 595 device_init_wakeup(&dev->dev, false); 596 597 usb_remove_hcd(hcd); 598 usb_put_hcd(shared_hcd); 599 usb_put_hcd(hcd); 600 xhci_mtk_sch_exit(mtk); 601 xhci_mtk_clks_disable(mtk); 602 xhci_mtk_ldos_disable(mtk); 603 604 return 0; 605 } 606 607 /* 608 * if ip sleep fails, and all clocks are disabled, access register will hang 609 * AHB bus, so stop polling roothubs to avoid regs access on bus suspend. 610 * and no need to check whether ip sleep failed or not; this will cause SPM 611 * to wake up system immediately after system suspend complete if ip sleep 612 * fails, it is what we wanted. 613 */ 614 static int __maybe_unused xhci_mtk_suspend(struct device *dev) 615 { 616 struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); 617 struct usb_hcd *hcd = mtk->hcd; 618 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 619 620 xhci_dbg(xhci, "%s: stop port polling\n", __func__); 621 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 622 del_timer_sync(&hcd->rh_timer); 623 clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); 624 del_timer_sync(&xhci->shared_hcd->rh_timer); 625 626 xhci_mtk_host_disable(mtk); 627 xhci_mtk_clks_disable(mtk); 628 usb_wakeup_set(mtk, true); 629 return 0; 630 } 631 632 static int __maybe_unused xhci_mtk_resume(struct device *dev) 633 { 634 struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); 635 struct usb_hcd *hcd = mtk->hcd; 636 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 637 638 usb_wakeup_set(mtk, false); 639 xhci_mtk_clks_enable(mtk); 640 xhci_mtk_host_enable(mtk); 641 642 xhci_dbg(xhci, "%s: restart port polling\n", __func__); 643 set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); 644 usb_hcd_poll_rh_status(xhci->shared_hcd); 645 set_bit(HCD_FLAG_POLL_RH, &hcd->flags); 646 usb_hcd_poll_rh_status(hcd); 647 return 0; 648 } 649 650 static const struct dev_pm_ops xhci_mtk_pm_ops = { 651 SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume) 652 }; 653 #define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL 654 655 #ifdef CONFIG_OF 656 static const struct of_device_id mtk_xhci_of_match[] = { 657 { .compatible = "mediatek,mt8173-xhci"}, 658 { .compatible = "mediatek,mtk-xhci"}, 659 { }, 660 }; 661 MODULE_DEVICE_TABLE(of, mtk_xhci_of_match); 662 #endif 663 664 static struct platform_driver mtk_xhci_driver = { 665 .probe = xhci_mtk_probe, 666 .remove = xhci_mtk_remove, 667 .driver = { 668 .name = "xhci-mtk", 669 .pm = DEV_PM_OPS, 670 .of_match_table = of_match_ptr(mtk_xhci_of_match), 671 }, 672 }; 673 MODULE_ALIAS("platform:xhci-mtk"); 674 675 static int __init xhci_mtk_init(void) 676 { 677 xhci_init_driver(&xhci_mtk_hc_driver, &xhci_mtk_overrides); 678 return platform_driver_register(&mtk_xhci_driver); 679 } 680 module_init(xhci_mtk_init); 681 682 static void __exit xhci_mtk_exit(void) 683 { 684 platform_driver_unregister(&mtk_xhci_driver); 685 } 686 module_exit(xhci_mtk_exit); 687 688 MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>"); 689 MODULE_DESCRIPTION("MediaTek xHCI Host Controller Driver"); 690 MODULE_LICENSE("GPL v2"); 691