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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#include <linux/reset.h>
23
24#include "xhci.h"
25#include "xhci-plat.h"
26#include "xhci-mvebu.h"
27
28static struct hc_driver __read_mostly xhci_plat_hc_driver;
29
30static int xhci_plat_setup(struct usb_hcd *hcd);
31static int xhci_plat_start(struct usb_hcd *hcd);
32
33static 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
39static 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
47static int xhci_priv_init_quirk(struct usb_hcd *hcd)
48{
49 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
50
51 if (!priv->init_quirk)
52 return 0;
53
54 return priv->init_quirk(hcd);
55}
56
57static int xhci_priv_suspend_quirk(struct usb_hcd *hcd)
58{
59 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
60
61 if (!priv->suspend_quirk)
62 return 0;
63
64 return priv->suspend_quirk(hcd);
65}
66
67static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
68{
69 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
70
71 if (!priv->resume_quirk)
72 return 0;
73
74 return priv->resume_quirk(hcd);
75}
76
77static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
78{
79 struct xhci_plat_priv *priv = xhci_to_priv(xhci);
80
81 xhci->quirks |= priv->quirks;
82}
83
84/* called during probe() after chip reset completes */
85static int xhci_plat_setup(struct usb_hcd *hcd)
86{
87 int ret;
88
89
90 ret = xhci_priv_init_quirk(hcd);
91 if (ret)
92 return ret;
93
94 return xhci_gen_setup(hcd, xhci_plat_quirks);
95}
96
97static int xhci_plat_start(struct usb_hcd *hcd)
98{
99 xhci_priv_plat_start(hcd);
100 return xhci_run(hcd);
101}
102
103#ifdef CONFIG_OF
104static const struct xhci_plat_priv xhci_plat_marvell_armada = {
105 .init_quirk = xhci_mvebu_mbus_init_quirk,
106};
107
108static const struct xhci_plat_priv xhci_plat_marvell_armada3700 = {
109 .init_quirk = xhci_mvebu_a3700_init_quirk,
110};
111
112static const struct xhci_plat_priv xhci_plat_brcm = {
113 .quirks = XHCI_RESET_ON_RESUME | XHCI_SUSPEND_RESUME_CLKS,
114};
115
116static const struct of_device_id usb_xhci_of_match[] = {
117 {
118 .compatible = "generic-xhci",
119 }, {
120 .compatible = "xhci-platform",
121 }, {
122 .compatible = "marvell,armada-375-xhci",
123 .data = &xhci_plat_marvell_armada,
124 }, {
125 .compatible = "marvell,armada-380-xhci",
126 .data = &xhci_plat_marvell_armada,
127 }, {
128 .compatible = "marvell,armada3700-xhci",
129 .data = &xhci_plat_marvell_armada3700,
130 }, {
131 .compatible = "brcm,xhci-brcm-v2",
132 .data = &xhci_plat_brcm,
133 }, {
134 .compatible = "brcm,bcm2711-xhci",
135 .data = &xhci_plat_brcm,
136 }, {
137 .compatible = "brcm,bcm7445-xhci",
138 .data = &xhci_plat_brcm,
139 },
140 {},
141};
142MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
143#endif
144
145int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const struct xhci_plat_priv *priv_match)
146{
147 const struct hc_driver *driver;
148 struct device *tmpdev;
149 struct xhci_hcd *xhci;
150 struct resource *res;
151 struct usb_hcd *hcd, *usb3_hcd;
152 int ret;
153 int irq;
154 struct xhci_plat_priv *priv = NULL;
155 bool of_match;
156
157 if (usb_disabled())
158 return -ENODEV;
159
160 driver = &xhci_plat_hc_driver;
161
162 irq = platform_get_irq(pdev, 0);
163 if (irq < 0)
164 return irq;
165
166 if (!sysdev)
167 sysdev = &pdev->dev;
168
169 ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(64));
170 if (ret)
171 return ret;
172
173 pm_runtime_set_active(&pdev->dev);
174 pm_runtime_enable(&pdev->dev);
175 pm_runtime_get_noresume(&pdev->dev);
176
177 hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
178 dev_name(&pdev->dev), NULL);
179 if (!hcd) {
180 ret = -ENOMEM;
181 goto disable_runtime;
182 }
183
184 hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
185 if (IS_ERR(hcd->regs)) {
186 ret = PTR_ERR(hcd->regs);
187 goto put_hcd;
188 }
189
190 hcd->rsrc_start = res->start;
191 hcd->rsrc_len = resource_size(res);
192
193 xhci = hcd_to_xhci(hcd);
194
195 xhci->allow_single_roothub = 1;
196
197 /*
198 * Not all platforms have clks so it is not an error if the
199 * clock do not exist.
200 */
201 xhci->reg_clk = devm_clk_get_optional(&pdev->dev, "reg");
202 if (IS_ERR(xhci->reg_clk)) {
203 ret = PTR_ERR(xhci->reg_clk);
204 goto put_hcd;
205 }
206
207 xhci->clk = devm_clk_get_optional(&pdev->dev, NULL);
208 if (IS_ERR(xhci->clk)) {
209 ret = PTR_ERR(xhci->clk);
210 goto put_hcd;
211 }
212
213 xhci->reset = devm_reset_control_array_get_optional_shared(&pdev->dev);
214 if (IS_ERR(xhci->reset)) {
215 ret = PTR_ERR(xhci->reset);
216 goto put_hcd;
217 }
218
219 ret = reset_control_deassert(xhci->reset);
220 if (ret)
221 goto put_hcd;
222
223 ret = clk_prepare_enable(xhci->reg_clk);
224 if (ret)
225 goto err_reset;
226
227 ret = clk_prepare_enable(xhci->clk);
228 if (ret)
229 goto disable_reg_clk;
230
231 if (priv_match) {
232 priv = hcd_to_xhci_priv(hcd);
233 /* Just copy data for now */
234 *priv = *priv_match;
235 }
236
237 device_set_wakeup_capable(&pdev->dev, true);
238
239 xhci->main_hcd = hcd;
240
241 /* imod_interval is the interrupt moderation value in nanoseconds. */
242 xhci->imod_interval = 40000;
243
244 /* Iterate over all parent nodes for finding quirks */
245 for (tmpdev = &pdev->dev; tmpdev; tmpdev = tmpdev->parent) {
246
247 if (device_property_read_bool(tmpdev, "usb2-lpm-disable"))
248 xhci->quirks |= XHCI_HW_LPM_DISABLE;
249
250 if (device_property_read_bool(tmpdev, "usb3-lpm-capable"))
251 xhci->quirks |= XHCI_LPM_SUPPORT;
252
253 if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))
254 xhci->quirks |= XHCI_BROKEN_PORT_PED;
255
256 if (device_property_read_bool(tmpdev, "xhci-sg-trb-cache-size-quirk"))
257 xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK;
258
259 device_property_read_u32(tmpdev, "imod-interval-ns",
260 &xhci->imod_interval);
261 }
262
263 /*
264 * Drivers such as dwc3 manages PHYs themself (and rely on driver name
265 * matching for the xhci platform device).
266 */
267 of_match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
268 if (of_match) {
269 hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);
270 if (IS_ERR(hcd->usb_phy)) {
271 ret = PTR_ERR(hcd->usb_phy);
272 if (ret == -EPROBE_DEFER)
273 goto disable_clk;
274 hcd->usb_phy = NULL;
275 } else {
276 ret = usb_phy_init(hcd->usb_phy);
277 if (ret)
278 goto disable_clk;
279 }
280 }
281
282 hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
283
284 if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
285 hcd->skip_phy_initialization = 1;
286
287 if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK))
288 xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK;
289
290 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
291 if (ret)
292 goto disable_usb_phy;
293
294 if (!xhci_has_one_roothub(xhci)) {
295 xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
296 dev_name(&pdev->dev), hcd);
297 if (!xhci->shared_hcd) {
298 ret = -ENOMEM;
299 goto dealloc_usb2_hcd;
300 }
301
302 if (of_match) {
303 xhci->shared_hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev,
304 "usb-phy", 1);
305 if (IS_ERR(xhci->shared_hcd->usb_phy)) {
306 xhci->shared_hcd->usb_phy = NULL;
307 } else {
308 ret = usb_phy_init(xhci->shared_hcd->usb_phy);
309 if (ret)
310 dev_err(sysdev, "%s init usb3phy fail (ret=%d)\n",
311 __func__, ret);
312 }
313 }
314
315 xhci->shared_hcd->tpl_support = hcd->tpl_support;
316 }
317
318 usb3_hcd = xhci_get_usb3_hcd(xhci);
319 if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4)
320 usb3_hcd->can_do_streams = 1;
321
322 if (xhci->shared_hcd) {
323 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
324 if (ret)
325 goto put_usb3_hcd;
326 }
327
328 device_enable_async_suspend(&pdev->dev);
329 pm_runtime_put_noidle(&pdev->dev);
330
331 /*
332 * Prevent runtime pm from being on as default, users should enable
333 * runtime pm using power/control in sysfs.
334 */
335 pm_runtime_forbid(&pdev->dev);
336
337 return 0;
338
339
340put_usb3_hcd:
341 usb_put_hcd(xhci->shared_hcd);
342
343dealloc_usb2_hcd:
344 usb_remove_hcd(hcd);
345
346disable_usb_phy:
347 usb_phy_shutdown(hcd->usb_phy);
348
349disable_clk:
350 clk_disable_unprepare(xhci->clk);
351
352disable_reg_clk:
353 clk_disable_unprepare(xhci->reg_clk);
354
355err_reset:
356 reset_control_assert(xhci->reset);
357
358put_hcd:
359 usb_put_hcd(hcd);
360
361disable_runtime:
362 pm_runtime_put_noidle(&pdev->dev);
363 pm_runtime_disable(&pdev->dev);
364
365 return ret;
366}
367EXPORT_SYMBOL_GPL(xhci_plat_probe);
368
369static int xhci_generic_plat_probe(struct platform_device *pdev)
370{
371 const struct xhci_plat_priv *priv_match;
372 struct device *sysdev;
373 int ret;
374
375 /*
376 * sysdev must point to a device that is known to the system firmware
377 * or PCI hardware. We handle these three cases here:
378 * 1. xhci_plat comes from firmware
379 * 2. xhci_plat is child of a device from firmware (dwc3-plat)
380 * 3. xhci_plat is grandchild of a pci device (dwc3-pci)
381 */
382 for (sysdev = &pdev->dev; sysdev; sysdev = sysdev->parent) {
383 if (is_of_node(sysdev->fwnode) ||
384 is_acpi_device_node(sysdev->fwnode))
385 break;
386 else if (dev_is_pci(sysdev))
387 break;
388 }
389
390 if (!sysdev)
391 sysdev = &pdev->dev;
392
393 if (WARN_ON(!sysdev->dma_mask)) {
394 /* Platform did not initialize dma_mask */
395 ret = dma_coerce_mask_and_coherent(sysdev, DMA_BIT_MASK(64));
396 if (ret)
397 return ret;
398 }
399
400 if (pdev->dev.of_node)
401 priv_match = of_device_get_match_data(&pdev->dev);
402 else
403 priv_match = dev_get_platdata(&pdev->dev);
404
405 return xhci_plat_probe(pdev, sysdev, priv_match);
406}
407
408void xhci_plat_remove(struct platform_device *dev)
409{
410 struct usb_hcd *hcd = platform_get_drvdata(dev);
411 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
412 struct clk *clk = xhci->clk;
413 struct clk *reg_clk = xhci->reg_clk;
414 struct usb_hcd *shared_hcd = xhci->shared_hcd;
415
416 xhci->xhc_state |= XHCI_STATE_REMOVING;
417 pm_runtime_get_sync(&dev->dev);
418
419 if (shared_hcd) {
420 usb_remove_hcd(shared_hcd);
421 xhci->shared_hcd = NULL;
422 }
423
424 usb_phy_shutdown(hcd->usb_phy);
425
426 usb_remove_hcd(hcd);
427
428 if (shared_hcd)
429 usb_put_hcd(shared_hcd);
430
431 clk_disable_unprepare(clk);
432 clk_disable_unprepare(reg_clk);
433 reset_control_assert(xhci->reset);
434 usb_put_hcd(hcd);
435
436 pm_runtime_disable(&dev->dev);
437 pm_runtime_put_noidle(&dev->dev);
438 pm_runtime_set_suspended(&dev->dev);
439}
440EXPORT_SYMBOL_GPL(xhci_plat_remove);
441
442static int xhci_plat_suspend(struct device *dev)
443{
444 struct usb_hcd *hcd = dev_get_drvdata(dev);
445 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
446 int ret;
447
448 if (pm_runtime_suspended(dev))
449 pm_runtime_resume(dev);
450
451 ret = xhci_priv_suspend_quirk(hcd);
452 if (ret)
453 return ret;
454 /*
455 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
456 * to do wakeup during suspend.
457 */
458 ret = xhci_suspend(xhci, device_may_wakeup(dev));
459 if (ret)
460 return ret;
461
462 if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {
463 clk_disable_unprepare(xhci->clk);
464 clk_disable_unprepare(xhci->reg_clk);
465 }
466
467 return 0;
468}
469
470static int xhci_plat_resume_common(struct device *dev, struct pm_message pmsg)
471{
472 struct usb_hcd *hcd = dev_get_drvdata(dev);
473 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
474 int ret;
475
476 if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {
477 ret = clk_prepare_enable(xhci->clk);
478 if (ret)
479 return ret;
480
481 ret = clk_prepare_enable(xhci->reg_clk);
482 if (ret) {
483 clk_disable_unprepare(xhci->clk);
484 return ret;
485 }
486 }
487
488 ret = xhci_priv_resume_quirk(hcd);
489 if (ret)
490 goto disable_clks;
491
492 ret = xhci_resume(xhci, pmsg);
493 if (ret)
494 goto disable_clks;
495
496 pm_runtime_disable(dev);
497 pm_runtime_set_active(dev);
498 pm_runtime_enable(dev);
499
500 return 0;
501
502disable_clks:
503 if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {
504 clk_disable_unprepare(xhci->clk);
505 clk_disable_unprepare(xhci->reg_clk);
506 }
507
508 return ret;
509}
510
511static int xhci_plat_resume(struct device *dev)
512{
513 return xhci_plat_resume_common(dev, PMSG_RESUME);
514}
515
516static int xhci_plat_restore(struct device *dev)
517{
518 return xhci_plat_resume_common(dev, PMSG_RESTORE);
519}
520
521static int __maybe_unused xhci_plat_runtime_suspend(struct device *dev)
522{
523 struct usb_hcd *hcd = dev_get_drvdata(dev);
524 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
525 int ret;
526
527 ret = xhci_priv_suspend_quirk(hcd);
528 if (ret)
529 return ret;
530
531 return xhci_suspend(xhci, true);
532}
533
534static int __maybe_unused xhci_plat_runtime_resume(struct device *dev)
535{
536 struct usb_hcd *hcd = dev_get_drvdata(dev);
537 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
538
539 return xhci_resume(xhci, PMSG_AUTO_RESUME);
540}
541
542const struct dev_pm_ops xhci_plat_pm_ops = {
543 .suspend = pm_sleep_ptr(xhci_plat_suspend),
544 .resume = pm_sleep_ptr(xhci_plat_resume),
545 .freeze = pm_sleep_ptr(xhci_plat_suspend),
546 .thaw = pm_sleep_ptr(xhci_plat_resume),
547 .poweroff = pm_sleep_ptr(xhci_plat_suspend),
548 .restore = pm_sleep_ptr(xhci_plat_restore),
549
550 SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
551 xhci_plat_runtime_resume,
552 NULL)
553};
554EXPORT_SYMBOL_GPL(xhci_plat_pm_ops);
555
556#ifdef CONFIG_ACPI
557static const struct acpi_device_id usb_xhci_acpi_match[] = {
558 /* XHCI-compliant USB Controller */
559 { "PNP0D10", },
560 { }
561};
562MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
563#endif
564
565static struct platform_driver usb_generic_xhci_driver = {
566 .probe = xhci_generic_plat_probe,
567 .remove_new = xhci_plat_remove,
568 .shutdown = usb_hcd_platform_shutdown,
569 .driver = {
570 .name = "xhci-hcd",
571 .pm = &xhci_plat_pm_ops,
572 .of_match_table = of_match_ptr(usb_xhci_of_match),
573 .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
574 },
575};
576MODULE_ALIAS("platform:xhci-hcd");
577
578static int __init xhci_plat_init(void)
579{
580 xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
581 return platform_driver_register(&usb_generic_xhci_driver);
582}
583module_init(xhci_plat_init);
584
585static void __exit xhci_plat_exit(void)
586{
587 platform_driver_unregister(&usb_generic_xhci_driver);
588}
589module_exit(xhci_plat_exit);
590
591MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
592MODULE_LICENSE("GPL");
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
28static struct hc_driver __read_mostly xhci_plat_hc_driver;
29
30static int xhci_plat_setup(struct usb_hcd *hcd);
31static int xhci_plat_start(struct usb_hcd *hcd);
32
33static 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
39static 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
47static 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
57static 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
67static 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
77static 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
87static 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 */
100static 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
112static 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
119static const struct xhci_plat_priv xhci_plat_marvell_armada = {
120 .init_quirk = xhci_mvebu_mbus_init_quirk,
121};
122
123static 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
128static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
129 SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V1)
130};
131
132static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
133 SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V3)
134};
135
136static const struct xhci_plat_priv xhci_plat_brcm = {
137 .quirks = XHCI_RESET_ON_RESUME,
138};
139
140static 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};
184MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
185#endif
186
187static 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
380dealloc_usb2_hcd:
381 usb_remove_hcd(hcd);
382
383disable_usb_phy:
384 usb_phy_shutdown(hcd->usb_phy);
385
386put_usb3_hcd:
387 usb_put_hcd(xhci->shared_hcd);
388
389disable_clk:
390 clk_disable_unprepare(xhci->clk);
391
392disable_reg_clk:
393 clk_disable_unprepare(xhci->reg_clk);
394
395put_hcd:
396 usb_put_hcd(hcd);
397
398disable_runtime:
399 pm_runtime_put_noidle(&pdev->dev);
400 pm_runtime_disable(&pdev->dev);
401
402 return ret;
403}
404
405static 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
434static 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 ret = xhci_priv_suspend_quirk(hcd);
441 if (ret)
442 return ret;
443 /*
444 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
445 * to do wakeup during suspend.
446 */
447 return xhci_suspend(xhci, device_may_wakeup(dev));
448}
449
450static int __maybe_unused xhci_plat_resume(struct device *dev)
451{
452 struct usb_hcd *hcd = dev_get_drvdata(dev);
453 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
454 int ret;
455
456 ret = xhci_priv_resume_quirk(hcd);
457 if (ret)
458 return ret;
459
460 ret = xhci_resume(xhci, 0);
461 if (ret)
462 return ret;
463
464 pm_runtime_disable(dev);
465 pm_runtime_set_active(dev);
466 pm_runtime_enable(dev);
467
468 return 0;
469}
470
471static int __maybe_unused xhci_plat_runtime_suspend(struct device *dev)
472{
473 struct usb_hcd *hcd = dev_get_drvdata(dev);
474 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
475 int ret;
476
477 ret = xhci_priv_suspend_quirk(hcd);
478 if (ret)
479 return ret;
480
481 return xhci_suspend(xhci, true);
482}
483
484static int __maybe_unused xhci_plat_runtime_resume(struct device *dev)
485{
486 struct usb_hcd *hcd = dev_get_drvdata(dev);
487 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
488
489 return xhci_resume(xhci, 0);
490}
491
492static const struct dev_pm_ops xhci_plat_pm_ops = {
493 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
494
495 SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
496 xhci_plat_runtime_resume,
497 NULL)
498};
499
500#ifdef CONFIG_ACPI
501static const struct acpi_device_id usb_xhci_acpi_match[] = {
502 /* XHCI-compliant USB Controller */
503 { "PNP0D10", },
504 { }
505};
506MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
507#endif
508
509static struct platform_driver usb_xhci_driver = {
510 .probe = xhci_plat_probe,
511 .remove = xhci_plat_remove,
512 .shutdown = usb_hcd_platform_shutdown,
513 .driver = {
514 .name = "xhci-hcd",
515 .pm = &xhci_plat_pm_ops,
516 .of_match_table = of_match_ptr(usb_xhci_of_match),
517 .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
518 },
519};
520MODULE_ALIAS("platform:xhci-hcd");
521
522static int __init xhci_plat_init(void)
523{
524 xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
525 return platform_driver_register(&usb_xhci_driver);
526}
527module_init(xhci_plat_init);
528
529static void __exit xhci_plat_exit(void)
530{
531 platform_driver_unregister(&usb_xhci_driver);
532}
533module_exit(xhci_plat_exit);
534
535MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
536MODULE_LICENSE("GPL");