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7#include <linux/acpi.h>
8#include <linux/io.h>
9#include <linux/of.h>
10#include <linux/clk.h>
11#include <linux/irq.h>
12#include <linux/of_clk.h>
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/extcon.h>
16#include <linux/interconnect.h>
17#include <linux/of_platform.h>
18#include <linux/platform_device.h>
19#include <linux/phy/phy.h>
20#include <linux/usb/of.h>
21#include <linux/reset.h>
22#include <linux/iopoll.h>
23
24#include "core.h"
25
26
27#define QSCRATCH_HS_PHY_CTRL 0x10
28#define UTMI_OTG_VBUS_VALID BIT(20)
29#define SW_SESSVLD_SEL BIT(28)
30
31#define QSCRATCH_SS_PHY_CTRL 0x30
32#define LANE0_PWR_PRESENT BIT(24)
33
34#define QSCRATCH_GENERAL_CFG 0x08
35#define PIPE_UTMI_CLK_SEL BIT(0)
36#define PIPE3_PHYSTATUS_SW BIT(3)
37#define PIPE_UTMI_CLK_DIS BIT(8)
38
39#define PWR_EVNT_IRQ_STAT_REG 0x58
40#define PWR_EVNT_LPM_IN_L2_MASK BIT(4)
41#define PWR_EVNT_LPM_OUT_L2_MASK BIT(5)
42
43#define SDM845_QSCRATCH_BASE_OFFSET 0xf8800
44#define SDM845_QSCRATCH_SIZE 0x400
45#define SDM845_DWC3_CORE_SIZE 0xcd00
46
47
48#define USB_MEMORY_AVG_HS_BW MBps_to_icc(240)
49#define USB_MEMORY_PEAK_HS_BW MBps_to_icc(700)
50#define USB_MEMORY_AVG_SS_BW MBps_to_icc(1000)
51#define USB_MEMORY_PEAK_SS_BW MBps_to_icc(2500)
52#define APPS_USB_AVG_BW 0
53#define APPS_USB_PEAK_BW MBps_to_icc(40)
54
55struct dwc3_acpi_pdata {
56 u32 qscratch_base_offset;
57 u32 qscratch_base_size;
58 u32 dwc3_core_base_size;
59 int hs_phy_irq_index;
60 int dp_hs_phy_irq_index;
61 int dm_hs_phy_irq_index;
62 int ss_phy_irq_index;
63 bool is_urs;
64};
65
66struct dwc3_qcom {
67 struct device *dev;
68 void __iomem *qscratch_base;
69 struct platform_device *dwc3;
70 struct platform_device *urs_usb;
71 struct clk **clks;
72 int num_clocks;
73 struct reset_control *resets;
74
75 int hs_phy_irq;
76 int dp_hs_phy_irq;
77 int dm_hs_phy_irq;
78 int ss_phy_irq;
79
80 struct extcon_dev *edev;
81 struct extcon_dev *host_edev;
82 struct notifier_block vbus_nb;
83 struct notifier_block host_nb;
84
85 const struct dwc3_acpi_pdata *acpi_pdata;
86
87 enum usb_dr_mode mode;
88 bool is_suspended;
89 bool pm_suspended;
90 struct icc_path *icc_path_ddr;
91 struct icc_path *icc_path_apps;
92};
93
94static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val)
95{
96 u32 reg;
97
98 reg = readl(base + offset);
99 reg |= val;
100 writel(reg, base + offset);
101
102
103 readl(base + offset);
104}
105
106static inline void dwc3_qcom_clrbits(void __iomem *base, u32 offset, u32 val)
107{
108 u32 reg;
109
110 reg = readl(base + offset);
111 reg &= ~val;
112 writel(reg, base + offset);
113
114
115 readl(base + offset);
116}
117
118static void dwc3_qcom_vbus_override_enable(struct dwc3_qcom *qcom, bool enable)
119{
120 if (enable) {
121 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
122 LANE0_PWR_PRESENT);
123 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
124 UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
125 } else {
126 dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
127 LANE0_PWR_PRESENT);
128 dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
129 UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
130 }
131}
132
133static int dwc3_qcom_vbus_notifier(struct notifier_block *nb,
134 unsigned long event, void *ptr)
135{
136 struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, vbus_nb);
137
138
139 dwc3_qcom_vbus_override_enable(qcom, event);
140 qcom->mode = event ? USB_DR_MODE_PERIPHERAL : USB_DR_MODE_HOST;
141
142 return NOTIFY_DONE;
143}
144
145static int dwc3_qcom_host_notifier(struct notifier_block *nb,
146 unsigned long event, void *ptr)
147{
148 struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, host_nb);
149
150
151 dwc3_qcom_vbus_override_enable(qcom, !event);
152 qcom->mode = event ? USB_DR_MODE_HOST : USB_DR_MODE_PERIPHERAL;
153
154 return NOTIFY_DONE;
155}
156
157static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom)
158{
159 struct device *dev = qcom->dev;
160 struct extcon_dev *host_edev;
161 int ret;
162
163 if (!of_property_read_bool(dev->of_node, "extcon"))
164 return 0;
165
166 qcom->edev = extcon_get_edev_by_phandle(dev, 0);
167 if (IS_ERR(qcom->edev))
168 return PTR_ERR(qcom->edev);
169
170 qcom->vbus_nb.notifier_call = dwc3_qcom_vbus_notifier;
171
172 qcom->host_edev = extcon_get_edev_by_phandle(dev, 1);
173 if (IS_ERR(qcom->host_edev))
174 qcom->host_edev = NULL;
175
176 ret = devm_extcon_register_notifier(dev, qcom->edev, EXTCON_USB,
177 &qcom->vbus_nb);
178 if (ret < 0) {
179 dev_err(dev, "VBUS notifier register failed\n");
180 return ret;
181 }
182
183 if (qcom->host_edev)
184 host_edev = qcom->host_edev;
185 else
186 host_edev = qcom->edev;
187
188 qcom->host_nb.notifier_call = dwc3_qcom_host_notifier;
189 ret = devm_extcon_register_notifier(dev, host_edev, EXTCON_USB_HOST,
190 &qcom->host_nb);
191 if (ret < 0) {
192 dev_err(dev, "Host notifier register failed\n");
193 return ret;
194 }
195
196
197 if (extcon_get_state(qcom->edev, EXTCON_USB) ||
198 !extcon_get_state(host_edev, EXTCON_USB_HOST))
199 dwc3_qcom_vbus_notifier(&qcom->vbus_nb, true, qcom->edev);
200 else
201 dwc3_qcom_vbus_notifier(&qcom->vbus_nb, false, qcom->edev);
202
203 return 0;
204}
205
206static int dwc3_qcom_interconnect_enable(struct dwc3_qcom *qcom)
207{
208 int ret;
209
210 ret = icc_enable(qcom->icc_path_ddr);
211 if (ret)
212 return ret;
213
214 ret = icc_enable(qcom->icc_path_apps);
215 if (ret)
216 icc_disable(qcom->icc_path_ddr);
217
218 return ret;
219}
220
221static int dwc3_qcom_interconnect_disable(struct dwc3_qcom *qcom)
222{
223 int ret;
224
225 ret = icc_disable(qcom->icc_path_ddr);
226 if (ret)
227 return ret;
228
229 ret = icc_disable(qcom->icc_path_apps);
230 if (ret)
231 icc_enable(qcom->icc_path_ddr);
232
233 return ret;
234}
235
236
237
238
239
240
241
242static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
243{
244 struct device *dev = qcom->dev;
245 int ret;
246
247 if (has_acpi_companion(dev))
248 return 0;
249
250 qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr");
251 if (IS_ERR(qcom->icc_path_ddr)) {
252 dev_err(dev, "failed to get usb-ddr path: %ld\n",
253 PTR_ERR(qcom->icc_path_ddr));
254 return PTR_ERR(qcom->icc_path_ddr);
255 }
256
257 qcom->icc_path_apps = of_icc_get(dev, "apps-usb");
258 if (IS_ERR(qcom->icc_path_apps)) {
259 dev_err(dev, "failed to get apps-usb path: %ld\n",
260 PTR_ERR(qcom->icc_path_apps));
261 return PTR_ERR(qcom->icc_path_apps);
262 }
263
264 if (usb_get_maximum_speed(&qcom->dwc3->dev) >= USB_SPEED_SUPER ||
265 usb_get_maximum_speed(&qcom->dwc3->dev) == USB_SPEED_UNKNOWN)
266 ret = icc_set_bw(qcom->icc_path_ddr,
267 USB_MEMORY_AVG_SS_BW, USB_MEMORY_PEAK_SS_BW);
268 else
269 ret = icc_set_bw(qcom->icc_path_ddr,
270 USB_MEMORY_AVG_HS_BW, USB_MEMORY_PEAK_HS_BW);
271
272 if (ret) {
273 dev_err(dev, "failed to set bandwidth for usb-ddr path: %d\n", ret);
274 return ret;
275 }
276
277 ret = icc_set_bw(qcom->icc_path_apps,
278 APPS_USB_AVG_BW, APPS_USB_PEAK_BW);
279 if (ret) {
280 dev_err(dev, "failed to set bandwidth for apps-usb path: %d\n", ret);
281 return ret;
282 }
283
284 return 0;
285}
286
287
288
289
290
291
292
293static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom)
294{
295 icc_put(qcom->icc_path_ddr);
296 icc_put(qcom->icc_path_apps);
297}
298
299static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
300{
301 if (qcom->hs_phy_irq) {
302 disable_irq_wake(qcom->hs_phy_irq);
303 disable_irq_nosync(qcom->hs_phy_irq);
304 }
305
306 if (qcom->dp_hs_phy_irq) {
307 disable_irq_wake(qcom->dp_hs_phy_irq);
308 disable_irq_nosync(qcom->dp_hs_phy_irq);
309 }
310
311 if (qcom->dm_hs_phy_irq) {
312 disable_irq_wake(qcom->dm_hs_phy_irq);
313 disable_irq_nosync(qcom->dm_hs_phy_irq);
314 }
315
316 if (qcom->ss_phy_irq) {
317 disable_irq_wake(qcom->ss_phy_irq);
318 disable_irq_nosync(qcom->ss_phy_irq);
319 }
320}
321
322static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
323{
324 if (qcom->hs_phy_irq) {
325 enable_irq(qcom->hs_phy_irq);
326 enable_irq_wake(qcom->hs_phy_irq);
327 }
328
329 if (qcom->dp_hs_phy_irq) {
330 enable_irq(qcom->dp_hs_phy_irq);
331 enable_irq_wake(qcom->dp_hs_phy_irq);
332 }
333
334 if (qcom->dm_hs_phy_irq) {
335 enable_irq(qcom->dm_hs_phy_irq);
336 enable_irq_wake(qcom->dm_hs_phy_irq);
337 }
338
339 if (qcom->ss_phy_irq) {
340 enable_irq(qcom->ss_phy_irq);
341 enable_irq_wake(qcom->ss_phy_irq);
342 }
343}
344
345static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
346{
347 u32 val;
348 int i, ret;
349
350 if (qcom->is_suspended)
351 return 0;
352
353 val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG);
354 if (!(val & PWR_EVNT_LPM_IN_L2_MASK))
355 dev_err(qcom->dev, "HS-PHY not in L2\n");
356
357 for (i = qcom->num_clocks - 1; i >= 0; i--)
358 clk_disable_unprepare(qcom->clks[i]);
359
360 ret = dwc3_qcom_interconnect_disable(qcom);
361 if (ret)
362 dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
363
364 if (device_may_wakeup(qcom->dev))
365 dwc3_qcom_enable_interrupts(qcom);
366
367 qcom->is_suspended = true;
368
369 return 0;
370}
371
372static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
373{
374 int ret;
375 int i;
376
377 if (!qcom->is_suspended)
378 return 0;
379
380 if (device_may_wakeup(qcom->dev))
381 dwc3_qcom_disable_interrupts(qcom);
382
383 for (i = 0; i < qcom->num_clocks; i++) {
384 ret = clk_prepare_enable(qcom->clks[i]);
385 if (ret < 0) {
386 while (--i >= 0)
387 clk_disable_unprepare(qcom->clks[i]);
388 return ret;
389 }
390 }
391
392 ret = dwc3_qcom_interconnect_enable(qcom);
393 if (ret)
394 dev_warn(qcom->dev, "failed to enable interconnect: %d\n", ret);
395
396
397 dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG,
398 PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK);
399
400 qcom->is_suspended = false;
401
402 return 0;
403}
404
405static irqreturn_t qcom_dwc3_resume_irq(int irq, void *data)
406{
407 struct dwc3_qcom *qcom = data;
408 struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
409
410
411 if (qcom->pm_suspended)
412 return IRQ_HANDLED;
413
414 if (dwc->xhci)
415 pm_runtime_resume(&dwc->xhci->dev);
416
417 return IRQ_HANDLED;
418}
419
420static void dwc3_qcom_select_utmi_clk(struct dwc3_qcom *qcom)
421{
422
423 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
424 PIPE_UTMI_CLK_DIS);
425
426 usleep_range(100, 1000);
427
428 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
429 PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW);
430
431 usleep_range(100, 1000);
432
433 dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
434 PIPE_UTMI_CLK_DIS);
435}
436
437static int dwc3_qcom_get_irq(struct platform_device *pdev,
438 const char *name, int num)
439{
440 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
441 struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb : pdev;
442 struct device_node *np = pdev->dev.of_node;
443 int ret;
444
445 if (np)
446 ret = platform_get_irq_byname(pdev_irq, name);
447 else
448 ret = platform_get_irq(pdev_irq, num);
449
450 return ret;
451}
452
453static int dwc3_qcom_setup_irq(struct platform_device *pdev)
454{
455 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
456 const struct dwc3_acpi_pdata *pdata = qcom->acpi_pdata;
457 int irq;
458 int ret;
459
460 irq = dwc3_qcom_get_irq(pdev, "hs_phy_irq",
461 pdata ? pdata->hs_phy_irq_index : -1);
462 if (irq > 0) {
463
464 irq_set_status_flags(irq, IRQ_NOAUTOEN);
465 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
466 qcom_dwc3_resume_irq,
467 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
468 "qcom_dwc3 HS", qcom);
469 if (ret) {
470 dev_err(qcom->dev, "hs_phy_irq failed: %d\n", ret);
471 return ret;
472 }
473 qcom->hs_phy_irq = irq;
474 }
475
476 irq = dwc3_qcom_get_irq(pdev, "dp_hs_phy_irq",
477 pdata ? pdata->dp_hs_phy_irq_index : -1);
478 if (irq > 0) {
479 irq_set_status_flags(irq, IRQ_NOAUTOEN);
480 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
481 qcom_dwc3_resume_irq,
482 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
483 "qcom_dwc3 DP_HS", qcom);
484 if (ret) {
485 dev_err(qcom->dev, "dp_hs_phy_irq failed: %d\n", ret);
486 return ret;
487 }
488 qcom->dp_hs_phy_irq = irq;
489 }
490
491 irq = dwc3_qcom_get_irq(pdev, "dm_hs_phy_irq",
492 pdata ? pdata->dm_hs_phy_irq_index : -1);
493 if (irq > 0) {
494 irq_set_status_flags(irq, IRQ_NOAUTOEN);
495 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
496 qcom_dwc3_resume_irq,
497 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
498 "qcom_dwc3 DM_HS", qcom);
499 if (ret) {
500 dev_err(qcom->dev, "dm_hs_phy_irq failed: %d\n", ret);
501 return ret;
502 }
503 qcom->dm_hs_phy_irq = irq;
504 }
505
506 irq = dwc3_qcom_get_irq(pdev, "ss_phy_irq",
507 pdata ? pdata->ss_phy_irq_index : -1);
508 if (irq > 0) {
509 irq_set_status_flags(irq, IRQ_NOAUTOEN);
510 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
511 qcom_dwc3_resume_irq,
512 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
513 "qcom_dwc3 SS", qcom);
514 if (ret) {
515 dev_err(qcom->dev, "ss_phy_irq failed: %d\n", ret);
516 return ret;
517 }
518 qcom->ss_phy_irq = irq;
519 }
520
521 return 0;
522}
523
524static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count)
525{
526 struct device *dev = qcom->dev;
527 struct device_node *np = dev->of_node;
528 int i;
529
530 if (!np || !count)
531 return 0;
532
533 if (count < 0)
534 return count;
535
536 qcom->num_clocks = count;
537
538 qcom->clks = devm_kcalloc(dev, qcom->num_clocks,
539 sizeof(struct clk *), GFP_KERNEL);
540 if (!qcom->clks)
541 return -ENOMEM;
542
543 for (i = 0; i < qcom->num_clocks; i++) {
544 struct clk *clk;
545 int ret;
546
547 clk = of_clk_get(np, i);
548 if (IS_ERR(clk)) {
549 while (--i >= 0)
550 clk_put(qcom->clks[i]);
551 return PTR_ERR(clk);
552 }
553
554 ret = clk_prepare_enable(clk);
555 if (ret < 0) {
556 while (--i >= 0) {
557 clk_disable_unprepare(qcom->clks[i]);
558 clk_put(qcom->clks[i]);
559 }
560 clk_put(clk);
561
562 return ret;
563 }
564
565 qcom->clks[i] = clk;
566 }
567
568 return 0;
569}
570
571static const struct property_entry dwc3_qcom_acpi_properties[] = {
572 PROPERTY_ENTRY_STRING("dr_mode", "host"),
573 {}
574};
575
576static const struct software_node dwc3_qcom_swnode = {
577 .properties = dwc3_qcom_acpi_properties,
578};
579
580static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
581{
582 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
583 struct device *dev = &pdev->dev;
584 struct resource *res, *child_res = NULL;
585 struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb :
586 pdev;
587 int irq;
588 int ret;
589
590 qcom->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
591 if (!qcom->dwc3)
592 return -ENOMEM;
593
594 qcom->dwc3->dev.parent = dev;
595 qcom->dwc3->dev.type = dev->type;
596 qcom->dwc3->dev.dma_mask = dev->dma_mask;
597 qcom->dwc3->dev.dma_parms = dev->dma_parms;
598 qcom->dwc3->dev.coherent_dma_mask = dev->coherent_dma_mask;
599
600 child_res = kcalloc(2, sizeof(*child_res), GFP_KERNEL);
601 if (!child_res) {
602 platform_device_put(qcom->dwc3);
603 return -ENOMEM;
604 }
605
606 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
607 if (!res) {
608 dev_err(&pdev->dev, "failed to get memory resource\n");
609 ret = -ENODEV;
610 goto out;
611 }
612
613 child_res[0].flags = res->flags;
614 child_res[0].start = res->start;
615 child_res[0].end = child_res[0].start +
616 qcom->acpi_pdata->dwc3_core_base_size;
617
618 irq = platform_get_irq(pdev_irq, 0);
619 if (irq < 0) {
620 ret = irq;
621 goto out;
622 }
623 child_res[1].flags = IORESOURCE_IRQ;
624 child_res[1].start = child_res[1].end = irq;
625
626 ret = platform_device_add_resources(qcom->dwc3, child_res, 2);
627 if (ret) {
628 dev_err(&pdev->dev, "failed to add resources\n");
629 goto out;
630 }
631
632 ret = device_add_software_node(&qcom->dwc3->dev, &dwc3_qcom_swnode);
633 if (ret < 0) {
634 dev_err(&pdev->dev, "failed to add properties\n");
635 goto out;
636 }
637
638 ret = platform_device_add(qcom->dwc3);
639 if (ret) {
640 dev_err(&pdev->dev, "failed to add device\n");
641 device_remove_software_node(&qcom->dwc3->dev);
642 goto out;
643 }
644 kfree(child_res);
645 return 0;
646
647out:
648 platform_device_put(qcom->dwc3);
649 kfree(child_res);
650 return ret;
651}
652
653static int dwc3_qcom_of_register_core(struct platform_device *pdev)
654{
655 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
656 struct device_node *np = pdev->dev.of_node, *dwc3_np;
657 struct device *dev = &pdev->dev;
658 int ret;
659
660 dwc3_np = of_get_compatible_child(np, "snps,dwc3");
661 if (!dwc3_np) {
662 dev_err(dev, "failed to find dwc3 core child\n");
663 return -ENODEV;
664 }
665
666 ret = of_platform_populate(np, NULL, NULL, dev);
667 if (ret) {
668 dev_err(dev, "failed to register dwc3 core - %d\n", ret);
669 goto node_put;
670 }
671
672 qcom->dwc3 = of_find_device_by_node(dwc3_np);
673 if (!qcom->dwc3) {
674 ret = -ENODEV;
675 dev_err(dev, "failed to get dwc3 platform device\n");
676 }
677
678node_put:
679 of_node_put(dwc3_np);
680
681 return ret;
682}
683
684static struct platform_device *
685dwc3_qcom_create_urs_usb_platdev(struct device *dev)
686{
687 struct fwnode_handle *fwh;
688 struct acpi_device *adev;
689 char name[8];
690 int ret;
691 int id;
692
693
694 ret = sscanf(fwnode_get_name(dev->fwnode), "URS%d", &id);
695 if (!ret)
696 return NULL;
697
698
699 snprintf(name, sizeof(name), "USB%d", id);
700 fwh = fwnode_get_named_child_node(dev->fwnode, name);
701 if (!fwh)
702 return NULL;
703
704 adev = to_acpi_device_node(fwh);
705 if (!adev)
706 return NULL;
707
708 return acpi_create_platform_device(adev, NULL);
709}
710
711static int dwc3_qcom_probe(struct platform_device *pdev)
712{
713 struct device_node *np = pdev->dev.of_node;
714 struct device *dev = &pdev->dev;
715 struct dwc3_qcom *qcom;
716 struct resource *res, *parent_res = NULL;
717 int ret, i;
718 bool ignore_pipe_clk;
719
720 qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);
721 if (!qcom)
722 return -ENOMEM;
723
724 platform_set_drvdata(pdev, qcom);
725 qcom->dev = &pdev->dev;
726
727 if (has_acpi_companion(dev)) {
728 qcom->acpi_pdata = acpi_device_get_match_data(dev);
729 if (!qcom->acpi_pdata) {
730 dev_err(&pdev->dev, "no supporting ACPI device data\n");
731 return -EINVAL;
732 }
733 }
734
735 qcom->resets = devm_reset_control_array_get_optional_exclusive(dev);
736 if (IS_ERR(qcom->resets)) {
737 ret = PTR_ERR(qcom->resets);
738 dev_err(&pdev->dev, "failed to get resets, err=%d\n", ret);
739 return ret;
740 }
741
742 ret = reset_control_assert(qcom->resets);
743 if (ret) {
744 dev_err(&pdev->dev, "failed to assert resets, err=%d\n", ret);
745 return ret;
746 }
747
748 usleep_range(10, 1000);
749
750 ret = reset_control_deassert(qcom->resets);
751 if (ret) {
752 dev_err(&pdev->dev, "failed to deassert resets, err=%d\n", ret);
753 goto reset_assert;
754 }
755
756 ret = dwc3_qcom_clk_init(qcom, of_clk_get_parent_count(np));
757 if (ret) {
758 dev_err(dev, "failed to get clocks\n");
759 goto reset_assert;
760 }
761
762 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
763
764 if (np) {
765 parent_res = res;
766 } else {
767 parent_res = kmemdup(res, sizeof(struct resource), GFP_KERNEL);
768 if (!parent_res)
769 return -ENOMEM;
770
771 parent_res->start = res->start +
772 qcom->acpi_pdata->qscratch_base_offset;
773 parent_res->end = parent_res->start +
774 qcom->acpi_pdata->qscratch_base_size;
775
776 if (qcom->acpi_pdata->is_urs) {
777 qcom->urs_usb = dwc3_qcom_create_urs_usb_platdev(dev);
778 if (IS_ERR_OR_NULL(qcom->urs_usb)) {
779 dev_err(dev, "failed to create URS USB platdev\n");
780 if (!qcom->urs_usb)
781 return -ENODEV;
782 else
783 return PTR_ERR(qcom->urs_usb);
784 }
785 }
786 }
787
788 qcom->qscratch_base = devm_ioremap_resource(dev, parent_res);
789 if (IS_ERR(qcom->qscratch_base)) {
790 ret = PTR_ERR(qcom->qscratch_base);
791 goto clk_disable;
792 }
793
794 ret = dwc3_qcom_setup_irq(pdev);
795 if (ret) {
796 dev_err(dev, "failed to setup IRQs, err=%d\n", ret);
797 goto clk_disable;
798 }
799
800
801
802
803
804 ignore_pipe_clk = device_property_read_bool(dev,
805 "qcom,select-utmi-as-pipe-clk");
806 if (ignore_pipe_clk)
807 dwc3_qcom_select_utmi_clk(qcom);
808
809 if (np)
810 ret = dwc3_qcom_of_register_core(pdev);
811 else
812 ret = dwc3_qcom_acpi_register_core(pdev);
813
814 if (ret) {
815 dev_err(dev, "failed to register DWC3 Core, err=%d\n", ret);
816 goto depopulate;
817 }
818
819 ret = dwc3_qcom_interconnect_init(qcom);
820 if (ret)
821 goto depopulate;
822
823 qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev);
824
825
826 if (qcom->mode == USB_DR_MODE_PERIPHERAL)
827 dwc3_qcom_vbus_override_enable(qcom, true);
828
829
830 ret = dwc3_qcom_register_extcon(qcom);
831 if (ret)
832 goto interconnect_exit;
833
834 device_init_wakeup(&pdev->dev, 1);
835 qcom->is_suspended = false;
836 pm_runtime_set_active(dev);
837 pm_runtime_enable(dev);
838 pm_runtime_forbid(dev);
839
840 return 0;
841
842interconnect_exit:
843 dwc3_qcom_interconnect_exit(qcom);
844depopulate:
845 if (np)
846 of_platform_depopulate(&pdev->dev);
847 else
848 platform_device_put(pdev);
849clk_disable:
850 for (i = qcom->num_clocks - 1; i >= 0; i--) {
851 clk_disable_unprepare(qcom->clks[i]);
852 clk_put(qcom->clks[i]);
853 }
854reset_assert:
855 reset_control_assert(qcom->resets);
856
857 return ret;
858}
859
860static int dwc3_qcom_remove(struct platform_device *pdev)
861{
862 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
863 struct device *dev = &pdev->dev;
864 int i;
865
866 device_remove_software_node(&qcom->dwc3->dev);
867 of_platform_depopulate(dev);
868
869 for (i = qcom->num_clocks - 1; i >= 0; i--) {
870 clk_disable_unprepare(qcom->clks[i]);
871 clk_put(qcom->clks[i]);
872 }
873 qcom->num_clocks = 0;
874
875 dwc3_qcom_interconnect_exit(qcom);
876 reset_control_assert(qcom->resets);
877
878 pm_runtime_allow(dev);
879 pm_runtime_disable(dev);
880
881 return 0;
882}
883
884static int __maybe_unused dwc3_qcom_pm_suspend(struct device *dev)
885{
886 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
887 int ret = 0;
888
889 ret = dwc3_qcom_suspend(qcom);
890 if (!ret)
891 qcom->pm_suspended = true;
892
893 return ret;
894}
895
896static int __maybe_unused dwc3_qcom_pm_resume(struct device *dev)
897{
898 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
899 int ret;
900
901 ret = dwc3_qcom_resume(qcom);
902 if (!ret)
903 qcom->pm_suspended = false;
904
905 return ret;
906}
907
908static int __maybe_unused dwc3_qcom_runtime_suspend(struct device *dev)
909{
910 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
911
912 return dwc3_qcom_suspend(qcom);
913}
914
915static int __maybe_unused dwc3_qcom_runtime_resume(struct device *dev)
916{
917 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
918
919 return dwc3_qcom_resume(qcom);
920}
921
922static const struct dev_pm_ops dwc3_qcom_dev_pm_ops = {
923 SET_SYSTEM_SLEEP_PM_OPS(dwc3_qcom_pm_suspend, dwc3_qcom_pm_resume)
924 SET_RUNTIME_PM_OPS(dwc3_qcom_runtime_suspend, dwc3_qcom_runtime_resume,
925 NULL)
926};
927
928static const struct of_device_id dwc3_qcom_of_match[] = {
929 { .compatible = "qcom,dwc3" },
930 { .compatible = "qcom,msm8996-dwc3" },
931 { .compatible = "qcom,msm8998-dwc3" },
932 { .compatible = "qcom,sdm660-dwc3" },
933 { .compatible = "qcom,sdm845-dwc3" },
934 { }
935};
936MODULE_DEVICE_TABLE(of, dwc3_qcom_of_match);
937
938#ifdef CONFIG_ACPI
939static const struct dwc3_acpi_pdata sdm845_acpi_pdata = {
940 .qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
941 .qscratch_base_size = SDM845_QSCRATCH_SIZE,
942 .dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
943 .hs_phy_irq_index = 1,
944 .dp_hs_phy_irq_index = 4,
945 .dm_hs_phy_irq_index = 3,
946 .ss_phy_irq_index = 2
947};
948
949static const struct dwc3_acpi_pdata sdm845_acpi_urs_pdata = {
950 .qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
951 .qscratch_base_size = SDM845_QSCRATCH_SIZE,
952 .dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
953 .hs_phy_irq_index = 1,
954 .dp_hs_phy_irq_index = 4,
955 .dm_hs_phy_irq_index = 3,
956 .ss_phy_irq_index = 2,
957 .is_urs = true,
958};
959
960static const struct acpi_device_id dwc3_qcom_acpi_match[] = {
961 { "QCOM2430", (unsigned long)&sdm845_acpi_pdata },
962 { "QCOM0304", (unsigned long)&sdm845_acpi_urs_pdata },
963 { "QCOM0497", (unsigned long)&sdm845_acpi_urs_pdata },
964 { "QCOM04A6", (unsigned long)&sdm845_acpi_pdata },
965 { },
966};
967MODULE_DEVICE_TABLE(acpi, dwc3_qcom_acpi_match);
968#endif
969
970static struct platform_driver dwc3_qcom_driver = {
971 .probe = dwc3_qcom_probe,
972 .remove = dwc3_qcom_remove,
973 .driver = {
974 .name = "dwc3-qcom",
975 .pm = &dwc3_qcom_dev_pm_ops,
976 .of_match_table = dwc3_qcom_of_match,
977 .acpi_match_table = ACPI_PTR(dwc3_qcom_acpi_match),
978 },
979};
980
981module_platform_driver(dwc3_qcom_driver);
982
983MODULE_LICENSE("GPL v2");
984MODULE_DESCRIPTION("DesignWare DWC3 QCOM Glue Driver");
985
