1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * xhci-plat.c - xHCI host controller driver platform Bus Glue. 4 * 5 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com 6 * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> 7 * 8 * A lot of code borrowed from the Linux xHCI driver. 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/module.h> 14 #include <linux/pci.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/platform_device.h> 18 #include <linux/usb/phy.h> 19 #include <linux/slab.h> 20 #include <linux/acpi.h> 21 #include <linux/usb/of.h> 22 23 #include "xhci.h" 24 #include "xhci-plat.h" 25 #include "xhci-mvebu.h" 26 #include "xhci-rcar.h" 27 28 static struct hc_driver __read_mostly xhci_plat_hc_driver; 29 30 static int xhci_plat_setup(struct usb_hcd *hcd); 31 static int xhci_plat_start(struct usb_hcd *hcd); 32 33 static const struct xhci_driver_overrides xhci_plat_overrides __initconst = { 34 .extra_priv_size = sizeof(struct xhci_plat_priv), 35 .reset = xhci_plat_setup, 36 .start = xhci_plat_start, 37 }; 38 39 static void xhci_priv_plat_start(struct usb_hcd *hcd) 40 { 41 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); 42 43 if (priv->plat_start) 44 priv->plat_start(hcd); 45 } 46 47 static int xhci_priv_plat_setup(struct usb_hcd *hcd) 48 { 49 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); 50 51 if (!priv->plat_setup) 52 return 0; 53 54 return priv->plat_setup(hcd); 55 } 56 57 static int xhci_priv_init_quirk(struct usb_hcd *hcd) 58 { 59 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); 60 61 if (!priv->init_quirk) 62 return 0; 63 64 return priv->init_quirk(hcd); 65 } 66 67 static int xhci_priv_suspend_quirk(struct usb_hcd *hcd) 68 { 69 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); 70 71 if (!priv->suspend_quirk) 72 return 0; 73 74 return priv->suspend_quirk(hcd); 75 } 76 77 static int xhci_priv_resume_quirk(struct usb_hcd *hcd) 78 { 79 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); 80 81 if (!priv->resume_quirk) 82 return 0; 83 84 return priv->resume_quirk(hcd); 85 } 86 87 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) 88 { 89 struct xhci_plat_priv *priv = xhci_to_priv(xhci); 90 91 /* 92 * As of now platform drivers don't provide MSI support so we ensure 93 * here that the generic code does not try to make a pci_dev from our 94 * dev struct in order to setup MSI 95 */ 96 xhci->quirks |= XHCI_PLAT | priv->quirks; 97 } 98 99 /* called during probe() after chip reset completes */ 100 static int xhci_plat_setup(struct usb_hcd *hcd) 101 { 102 int ret; 103 104 105 ret = xhci_priv_init_quirk(hcd); 106 if (ret) 107 return ret; 108 109 return xhci_gen_setup(hcd, xhci_plat_quirks); 110 } 111 112 static int xhci_plat_start(struct usb_hcd *hcd) 113 { 114 xhci_priv_plat_start(hcd); 115 return xhci_run(hcd); 116 } 117 118 #ifdef CONFIG_OF 119 static const struct xhci_plat_priv xhci_plat_marvell_armada = { 120 .init_quirk = xhci_mvebu_mbus_init_quirk, 121 }; 122 123 static const struct xhci_plat_priv xhci_plat_marvell_armada3700 = { 124 .plat_setup = xhci_mvebu_a3700_plat_setup, 125 .init_quirk = xhci_mvebu_a3700_init_quirk, 126 }; 127 128 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = { 129 SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V1) 130 }; 131 132 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = { 133 SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V3) 134 }; 135 136 static const struct xhci_plat_priv xhci_plat_brcm = { 137 .quirks = XHCI_RESET_ON_RESUME, 138 }; 139 140 static const struct of_device_id usb_xhci_of_match[] = { 141 { 142 .compatible = "generic-xhci", 143 }, { 144 .compatible = "xhci-platform", 145 }, { 146 .compatible = "marvell,armada-375-xhci", 147 .data = &xhci_plat_marvell_armada, 148 }, { 149 .compatible = "marvell,armada-380-xhci", 150 .data = &xhci_plat_marvell_armada, 151 }, { 152 .compatible = "marvell,armada3700-xhci", 153 .data = &xhci_plat_marvell_armada3700, 154 }, { 155 .compatible = "renesas,xhci-r8a7790", 156 .data = &xhci_plat_renesas_rcar_gen2, 157 }, { 158 .compatible = "renesas,xhci-r8a7791", 159 .data = &xhci_plat_renesas_rcar_gen2, 160 }, { 161 .compatible = "renesas,xhci-r8a7793", 162 .data = &xhci_plat_renesas_rcar_gen2, 163 }, { 164 .compatible = "renesas,xhci-r8a7795", 165 .data = &xhci_plat_renesas_rcar_gen3, 166 }, { 167 .compatible = "renesas,xhci-r8a7796", 168 .data = &xhci_plat_renesas_rcar_gen3, 169 }, { 170 .compatible = "renesas,rcar-gen2-xhci", 171 .data = &xhci_plat_renesas_rcar_gen2, 172 }, { 173 .compatible = "renesas,rcar-gen3-xhci", 174 .data = &xhci_plat_renesas_rcar_gen3, 175 }, { 176 .compatible = "brcm,xhci-brcm-v2", 177 .data = &xhci_plat_brcm, 178 }, { 179 .compatible = "brcm,bcm7445-xhci", 180 .data = &xhci_plat_brcm, 181 }, 182 {}, 183 }; 184 MODULE_DEVICE_TABLE(of, usb_xhci_of_match); 185 #endif 186 187 static int xhci_plat_probe(struct platform_device *pdev) 188 { 189 const struct xhci_plat_priv *priv_match; 190 const struct hc_driver *driver; 191 struct device *sysdev, *tmpdev; 192 struct xhci_hcd *xhci; 193 struct resource *res; 194 struct usb_hcd *hcd; 195 int ret; 196 int irq; 197 struct xhci_plat_priv *priv = NULL; 198 199 200 if (usb_disabled()) 201 return -ENODEV; 202 203 driver = &xhci_plat_hc_driver; 204 205 irq = platform_get_irq(pdev, 0); 206 if (irq < 0) 207 return irq; 208 209 /* 210 * sysdev must point to a device that is known to the system firmware 211 * or PCI hardware. We handle these three cases here: 212 * 1. xhci_plat comes from firmware 213 * 2. xhci_plat is child of a device from firmware (dwc3-plat) 214 * 3. xhci_plat is grandchild of a pci device (dwc3-pci) 215 */ 216 for (sysdev = &pdev->dev; sysdev; sysdev = sysdev->parent) { 217 if (is_of_node(sysdev->fwnode) || 218 is_acpi_device_node(sysdev->fwnode)) 219 break; 220 #ifdef CONFIG_PCI 221 else if (sysdev->bus == &pci_bus_type) 222 break; 223 #endif 224 } 225 226 if (!sysdev) 227 sysdev = &pdev->dev; 228 229 /* Try to set 64-bit DMA first */ 230 if (WARN_ON(!sysdev->dma_mask)) 231 /* Platform did not initialize dma_mask */ 232 ret = dma_coerce_mask_and_coherent(sysdev, 233 DMA_BIT_MASK(64)); 234 else 235 ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(64)); 236 237 /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */ 238 if (ret) { 239 ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(32)); 240 if (ret) 241 return ret; 242 } 243 244 pm_runtime_set_active(&pdev->dev); 245 pm_runtime_enable(&pdev->dev); 246 pm_runtime_get_noresume(&pdev->dev); 247 248 hcd = __usb_create_hcd(driver, sysdev, &pdev->dev, 249 dev_name(&pdev->dev), NULL); 250 if (!hcd) { 251 ret = -ENOMEM; 252 goto disable_runtime; 253 } 254 255 hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 256 if (IS_ERR(hcd->regs)) { 257 ret = PTR_ERR(hcd->regs); 258 goto put_hcd; 259 } 260 261 hcd->rsrc_start = res->start; 262 hcd->rsrc_len = resource_size(res); 263 264 xhci = hcd_to_xhci(hcd); 265 266 /* 267 * Not all platforms have clks so it is not an error if the 268 * clock do not exist. 269 */ 270 xhci->reg_clk = devm_clk_get_optional(&pdev->dev, "reg"); 271 if (IS_ERR(xhci->reg_clk)) { 272 ret = PTR_ERR(xhci->reg_clk); 273 goto put_hcd; 274 } 275 276 ret = clk_prepare_enable(xhci->reg_clk); 277 if (ret) 278 goto put_hcd; 279 280 xhci->clk = devm_clk_get_optional(&pdev->dev, NULL); 281 if (IS_ERR(xhci->clk)) { 282 ret = PTR_ERR(xhci->clk); 283 goto disable_reg_clk; 284 } 285 286 ret = clk_prepare_enable(xhci->clk); 287 if (ret) 288 goto disable_reg_clk; 289 290 if (pdev->dev.of_node) 291 priv_match = of_device_get_match_data(&pdev->dev); 292 else 293 priv_match = dev_get_platdata(&pdev->dev); 294 295 if (priv_match) { 296 priv = hcd_to_xhci_priv(hcd); 297 /* Just copy data for now */ 298 *priv = *priv_match; 299 } 300 301 device_set_wakeup_capable(&pdev->dev, true); 302 303 xhci->main_hcd = hcd; 304 xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev, 305 dev_name(&pdev->dev), hcd); 306 if (!xhci->shared_hcd) { 307 ret = -ENOMEM; 308 goto disable_clk; 309 } 310 311 /* imod_interval is the interrupt moderation value in nanoseconds. */ 312 xhci->imod_interval = 40000; 313 314 /* Iterate over all parent nodes for finding quirks */ 315 for (tmpdev = &pdev->dev; tmpdev; tmpdev = tmpdev->parent) { 316 317 if (device_property_read_bool(tmpdev, "usb2-lpm-disable")) 318 xhci->quirks |= XHCI_HW_LPM_DISABLE; 319 320 if (device_property_read_bool(tmpdev, "usb3-lpm-capable")) 321 xhci->quirks |= XHCI_LPM_SUPPORT; 322 323 if (device_property_read_bool(tmpdev, "quirk-broken-port-ped")) 324 xhci->quirks |= XHCI_BROKEN_PORT_PED; 325 326 device_property_read_u32(tmpdev, "imod-interval-ns", 327 &xhci->imod_interval); 328 } 329 330 hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0); 331 if (IS_ERR(hcd->usb_phy)) { 332 ret = PTR_ERR(hcd->usb_phy); 333 if (ret == -EPROBE_DEFER) 334 goto put_usb3_hcd; 335 hcd->usb_phy = NULL; 336 } else { 337 ret = usb_phy_init(hcd->usb_phy); 338 if (ret) 339 goto put_usb3_hcd; 340 } 341 342 hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node); 343 xhci->shared_hcd->tpl_support = hcd->tpl_support; 344 345 if (priv) { 346 ret = xhci_priv_plat_setup(hcd); 347 if (ret) 348 goto disable_usb_phy; 349 } 350 351 if ((xhci->quirks & XHCI_SKIP_PHY_INIT) || (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))) 352 hcd->skip_phy_initialization = 1; 353 354 if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK)) 355 xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK; 356 357 ret = usb_add_hcd(hcd, irq, IRQF_SHARED); 358 if (ret) 359 goto disable_usb_phy; 360 361 if (HCC_MAX_PSA(xhci->hcc_params) >= 4) 362 xhci->shared_hcd->can_do_streams = 1; 363 364 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); 365 if (ret) 366 goto dealloc_usb2_hcd; 367 368 device_enable_async_suspend(&pdev->dev); 369 pm_runtime_put_noidle(&pdev->dev); 370 371 /* 372 * Prevent runtime pm from being on as default, users should enable 373 * runtime pm using power/control in sysfs. 374 */ 375 pm_runtime_forbid(&pdev->dev); 376 377 return 0; 378 379 380 dealloc_usb2_hcd: 381 usb_remove_hcd(hcd); 382 383 disable_usb_phy: 384 usb_phy_shutdown(hcd->usb_phy); 385 386 put_usb3_hcd: 387 usb_put_hcd(xhci->shared_hcd); 388 389 disable_clk: 390 clk_disable_unprepare(xhci->clk); 391 392 disable_reg_clk: 393 clk_disable_unprepare(xhci->reg_clk); 394 395 put_hcd: 396 usb_put_hcd(hcd); 397 398 disable_runtime: 399 pm_runtime_put_noidle(&pdev->dev); 400 pm_runtime_disable(&pdev->dev); 401 402 return ret; 403 } 404 405 static int xhci_plat_remove(struct platform_device *dev) 406 { 407 struct usb_hcd *hcd = platform_get_drvdata(dev); 408 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 409 struct clk *clk = xhci->clk; 410 struct clk *reg_clk = xhci->reg_clk; 411 struct usb_hcd *shared_hcd = xhci->shared_hcd; 412 413 pm_runtime_get_sync(&dev->dev); 414 xhci->xhc_state |= XHCI_STATE_REMOVING; 415 416 usb_remove_hcd(shared_hcd); 417 xhci->shared_hcd = NULL; 418 usb_phy_shutdown(hcd->usb_phy); 419 420 usb_remove_hcd(hcd); 421 usb_put_hcd(shared_hcd); 422 423 clk_disable_unprepare(clk); 424 clk_disable_unprepare(reg_clk); 425 usb_put_hcd(hcd); 426 427 pm_runtime_disable(&dev->dev); 428 pm_runtime_put_noidle(&dev->dev); 429 pm_runtime_set_suspended(&dev->dev); 430 431 return 0; 432 } 433 434 static int __maybe_unused xhci_plat_suspend(struct device *dev) 435 { 436 struct usb_hcd *hcd = dev_get_drvdata(dev); 437 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 438 int ret; 439 440 if (pm_runtime_suspended(dev)) 441 pm_runtime_resume(dev); 442 443 ret = xhci_priv_suspend_quirk(hcd); 444 if (ret) 445 return ret; 446 /* 447 * xhci_suspend() needs `do_wakeup` to know whether host is allowed 448 * to do wakeup during suspend. 449 */ 450 return xhci_suspend(xhci, device_may_wakeup(dev)); 451 } 452 453 static int __maybe_unused xhci_plat_resume(struct device *dev) 454 { 455 struct usb_hcd *hcd = dev_get_drvdata(dev); 456 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 457 int ret; 458 459 ret = xhci_priv_resume_quirk(hcd); 460 if (ret) 461 return ret; 462 463 ret = xhci_resume(xhci, 0); 464 if (ret) 465 return ret; 466 467 pm_runtime_disable(dev); 468 pm_runtime_set_active(dev); 469 pm_runtime_enable(dev); 470 471 return 0; 472 } 473 474 static int __maybe_unused xhci_plat_runtime_suspend(struct device *dev) 475 { 476 struct usb_hcd *hcd = dev_get_drvdata(dev); 477 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 478 int ret; 479 480 ret = xhci_priv_suspend_quirk(hcd); 481 if (ret) 482 return ret; 483 484 return xhci_suspend(xhci, true); 485 } 486 487 static int __maybe_unused xhci_plat_runtime_resume(struct device *dev) 488 { 489 struct usb_hcd *hcd = dev_get_drvdata(dev); 490 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 491 492 return xhci_resume(xhci, 0); 493 } 494 495 static const struct dev_pm_ops xhci_plat_pm_ops = { 496 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) 497 498 SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend, 499 xhci_plat_runtime_resume, 500 NULL) 501 }; 502 503 #ifdef CONFIG_ACPI 504 static const struct acpi_device_id usb_xhci_acpi_match[] = { 505 /* XHCI-compliant USB Controller */ 506 { "PNP0D10", }, 507 { } 508 }; 509 MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match); 510 #endif 511 512 static struct platform_driver usb_xhci_driver = { 513 .probe = xhci_plat_probe, 514 .remove = xhci_plat_remove, 515 .shutdown = usb_hcd_platform_shutdown, 516 .driver = { 517 .name = "xhci-hcd", 518 .pm = &xhci_plat_pm_ops, 519 .of_match_table = of_match_ptr(usb_xhci_of_match), 520 .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match), 521 }, 522 }; 523 MODULE_ALIAS("platform:xhci-hcd"); 524 525 static int __init xhci_plat_init(void) 526 { 527 xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides); 528 return platform_driver_register(&usb_xhci_driver); 529 } 530 module_init(xhci_plat_init); 531 532 static void __exit xhci_plat_exit(void) 533 { 534 platform_driver_unregister(&usb_xhci_driver); 535 } 536 module_exit(xhci_plat_exit); 537 538 MODULE_DESCRIPTION("xHCI Platform Host Controller Driver"); 539 MODULE_LICENSE("GPL"); 540