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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
3 *
4 * Inspired by dwc3-of-simple.c
5 */
6
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#include <linux/usb/hcd.h>
24#include <linux/usb.h>
25#include "core.h"
26
27/* USB QSCRATCH Hardware registers */
28#define QSCRATCH_HS_PHY_CTRL 0x10
29#define UTMI_OTG_VBUS_VALID BIT(20)
30#define SW_SESSVLD_SEL BIT(28)
31
32#define QSCRATCH_SS_PHY_CTRL 0x30
33#define LANE0_PWR_PRESENT BIT(24)
34
35#define QSCRATCH_GENERAL_CFG 0x08
36#define PIPE_UTMI_CLK_SEL BIT(0)
37#define PIPE3_PHYSTATUS_SW BIT(3)
38#define PIPE_UTMI_CLK_DIS BIT(8)
39
40#define PWR_EVNT_IRQ_STAT_REG 0x58
41#define PWR_EVNT_LPM_IN_L2_MASK BIT(4)
42#define PWR_EVNT_LPM_OUT_L2_MASK BIT(5)
43
44#define SDM845_QSCRATCH_BASE_OFFSET 0xf8800
45#define SDM845_QSCRATCH_SIZE 0x400
46#define SDM845_DWC3_CORE_SIZE 0xcd00
47
48/* Interconnect path bandwidths in MBps */
49#define USB_MEMORY_AVG_HS_BW MBps_to_icc(240)
50#define USB_MEMORY_PEAK_HS_BW MBps_to_icc(700)
51#define USB_MEMORY_AVG_SS_BW MBps_to_icc(1000)
52#define USB_MEMORY_PEAK_SS_BW MBps_to_icc(2500)
53#define APPS_USB_AVG_BW 0
54#define APPS_USB_PEAK_BW MBps_to_icc(40)
55
56struct dwc3_acpi_pdata {
57 u32 qscratch_base_offset;
58 u32 qscratch_base_size;
59 u32 dwc3_core_base_size;
60 int hs_phy_irq_index;
61 int dp_hs_phy_irq_index;
62 int dm_hs_phy_irq_index;
63 int ss_phy_irq_index;
64 bool is_urs;
65};
66
67struct dwc3_qcom {
68 struct device *dev;
69 void __iomem *qscratch_base;
70 struct platform_device *dwc3;
71 struct platform_device *urs_usb;
72 struct clk **clks;
73 int num_clocks;
74 struct reset_control *resets;
75
76 int hs_phy_irq;
77 int dp_hs_phy_irq;
78 int dm_hs_phy_irq;
79 int ss_phy_irq;
80 enum usb_device_speed usb2_speed;
81
82 struct extcon_dev *edev;
83 struct extcon_dev *host_edev;
84 struct notifier_block vbus_nb;
85 struct notifier_block host_nb;
86
87 const struct dwc3_acpi_pdata *acpi_pdata;
88
89 enum usb_dr_mode mode;
90 bool is_suspended;
91 bool pm_suspended;
92 struct icc_path *icc_path_ddr;
93 struct icc_path *icc_path_apps;
94};
95
96static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val)
97{
98 u32 reg;
99
100 reg = readl(base + offset);
101 reg |= val;
102 writel(reg, base + offset);
103
104 /* ensure that above write is through */
105 readl(base + offset);
106}
107
108static inline void dwc3_qcom_clrbits(void __iomem *base, u32 offset, u32 val)
109{
110 u32 reg;
111
112 reg = readl(base + offset);
113 reg &= ~val;
114 writel(reg, base + offset);
115
116 /* ensure that above write is through */
117 readl(base + offset);
118}
119
120static void dwc3_qcom_vbus_override_enable(struct dwc3_qcom *qcom, bool enable)
121{
122 if (enable) {
123 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
124 LANE0_PWR_PRESENT);
125 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
126 UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
127 } else {
128 dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
129 LANE0_PWR_PRESENT);
130 dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
131 UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
132 }
133}
134
135static int dwc3_qcom_vbus_notifier(struct notifier_block *nb,
136 unsigned long event, void *ptr)
137{
138 struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, vbus_nb);
139
140 /* enable vbus override for device mode */
141 dwc3_qcom_vbus_override_enable(qcom, event);
142 qcom->mode = event ? USB_DR_MODE_PERIPHERAL : USB_DR_MODE_HOST;
143
144 return NOTIFY_DONE;
145}
146
147static int dwc3_qcom_host_notifier(struct notifier_block *nb,
148 unsigned long event, void *ptr)
149{
150 struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, host_nb);
151
152 /* disable vbus override in host mode */
153 dwc3_qcom_vbus_override_enable(qcom, !event);
154 qcom->mode = event ? USB_DR_MODE_HOST : USB_DR_MODE_PERIPHERAL;
155
156 return NOTIFY_DONE;
157}
158
159static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom)
160{
161 struct device *dev = qcom->dev;
162 struct extcon_dev *host_edev;
163 int ret;
164
165 if (!of_property_read_bool(dev->of_node, "extcon"))
166 return 0;
167
168 qcom->edev = extcon_get_edev_by_phandle(dev, 0);
169 if (IS_ERR(qcom->edev))
170 return PTR_ERR(qcom->edev);
171
172 qcom->vbus_nb.notifier_call = dwc3_qcom_vbus_notifier;
173
174 qcom->host_edev = extcon_get_edev_by_phandle(dev, 1);
175 if (IS_ERR(qcom->host_edev))
176 qcom->host_edev = NULL;
177
178 ret = devm_extcon_register_notifier(dev, qcom->edev, EXTCON_USB,
179 &qcom->vbus_nb);
180 if (ret < 0) {
181 dev_err(dev, "VBUS notifier register failed\n");
182 return ret;
183 }
184
185 if (qcom->host_edev)
186 host_edev = qcom->host_edev;
187 else
188 host_edev = qcom->edev;
189
190 qcom->host_nb.notifier_call = dwc3_qcom_host_notifier;
191 ret = devm_extcon_register_notifier(dev, host_edev, EXTCON_USB_HOST,
192 &qcom->host_nb);
193 if (ret < 0) {
194 dev_err(dev, "Host notifier register failed\n");
195 return ret;
196 }
197
198 /* Update initial VBUS override based on extcon state */
199 if (extcon_get_state(qcom->edev, EXTCON_USB) ||
200 !extcon_get_state(host_edev, EXTCON_USB_HOST))
201 dwc3_qcom_vbus_notifier(&qcom->vbus_nb, true, qcom->edev);
202 else
203 dwc3_qcom_vbus_notifier(&qcom->vbus_nb, false, qcom->edev);
204
205 return 0;
206}
207
208static int dwc3_qcom_interconnect_enable(struct dwc3_qcom *qcom)
209{
210 int ret;
211
212 ret = icc_enable(qcom->icc_path_ddr);
213 if (ret)
214 return ret;
215
216 ret = icc_enable(qcom->icc_path_apps);
217 if (ret)
218 icc_disable(qcom->icc_path_ddr);
219
220 return ret;
221}
222
223static int dwc3_qcom_interconnect_disable(struct dwc3_qcom *qcom)
224{
225 int ret;
226
227 ret = icc_disable(qcom->icc_path_ddr);
228 if (ret)
229 return ret;
230
231 ret = icc_disable(qcom->icc_path_apps);
232 if (ret)
233 icc_enable(qcom->icc_path_ddr);
234
235 return ret;
236}
237
238/**
239 * dwc3_qcom_interconnect_init() - Get interconnect path handles
240 * and set bandwidth.
241 * @qcom: Pointer to the concerned usb core.
242 *
243 */
244static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
245{
246 enum usb_device_speed max_speed;
247 struct device *dev = qcom->dev;
248 int ret;
249
250 if (has_acpi_companion(dev))
251 return 0;
252
253 qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr");
254 if (IS_ERR(qcom->icc_path_ddr)) {
255 dev_err(dev, "failed to get usb-ddr path: %ld\n",
256 PTR_ERR(qcom->icc_path_ddr));
257 return PTR_ERR(qcom->icc_path_ddr);
258 }
259
260 qcom->icc_path_apps = of_icc_get(dev, "apps-usb");
261 if (IS_ERR(qcom->icc_path_apps)) {
262 dev_err(dev, "failed to get apps-usb path: %ld\n",
263 PTR_ERR(qcom->icc_path_apps));
264 ret = PTR_ERR(qcom->icc_path_apps);
265 goto put_path_ddr;
266 }
267
268 max_speed = usb_get_maximum_speed(&qcom->dwc3->dev);
269 if (max_speed >= USB_SPEED_SUPER || max_speed == USB_SPEED_UNKNOWN) {
270 ret = icc_set_bw(qcom->icc_path_ddr,
271 USB_MEMORY_AVG_SS_BW, USB_MEMORY_PEAK_SS_BW);
272 } else {
273 ret = icc_set_bw(qcom->icc_path_ddr,
274 USB_MEMORY_AVG_HS_BW, USB_MEMORY_PEAK_HS_BW);
275 }
276 if (ret) {
277 dev_err(dev, "failed to set bandwidth for usb-ddr path: %d\n", ret);
278 goto put_path_apps;
279 }
280
281 ret = icc_set_bw(qcom->icc_path_apps, APPS_USB_AVG_BW, APPS_USB_PEAK_BW);
282 if (ret) {
283 dev_err(dev, "failed to set bandwidth for apps-usb path: %d\n", ret);
284 goto put_path_apps;
285 }
286
287 return 0;
288
289put_path_apps:
290 icc_put(qcom->icc_path_apps);
291put_path_ddr:
292 icc_put(qcom->icc_path_ddr);
293 return ret;
294}
295
296/**
297 * dwc3_qcom_interconnect_exit() - Release interconnect path handles
298 * @qcom: Pointer to the concerned usb core.
299 *
300 * This function is used to release interconnect path handle.
301 */
302static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom)
303{
304 icc_put(qcom->icc_path_ddr);
305 icc_put(qcom->icc_path_apps);
306}
307
308/* Only usable in contexts where the role can not change. */
309static bool dwc3_qcom_is_host(struct dwc3_qcom *qcom)
310{
311 struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
312
313 return dwc->xhci;
314}
315
316static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
317{
318 struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
319 struct usb_device *udev;
320 struct usb_hcd __maybe_unused *hcd;
321
322 /*
323 * FIXME: Fix this layering violation.
324 */
325 hcd = platform_get_drvdata(dwc->xhci);
326
327 /*
328 * It is possible to query the speed of all children of
329 * USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
330 * currently supports only 1 port per controller. So
331 * this is sufficient.
332 */
333#ifdef CONFIG_USB
334 udev = usb_hub_find_child(hcd->self.root_hub, 1);
335#else
336 udev = NULL;
337#endif
338 if (!udev)
339 return USB_SPEED_UNKNOWN;
340
341 return udev->speed;
342}
343
344static void dwc3_qcom_enable_wakeup_irq(int irq, unsigned int polarity)
345{
346 if (!irq)
347 return;
348
349 if (polarity)
350 irq_set_irq_type(irq, polarity);
351
352 enable_irq(irq);
353 enable_irq_wake(irq);
354}
355
356static void dwc3_qcom_disable_wakeup_irq(int irq)
357{
358 if (!irq)
359 return;
360
361 disable_irq_wake(irq);
362 disable_irq_nosync(irq);
363}
364
365static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
366{
367 dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);
368
369 if (qcom->usb2_speed == USB_SPEED_LOW) {
370 dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
371 } else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
372 (qcom->usb2_speed == USB_SPEED_FULL)) {
373 dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
374 } else {
375 dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
376 dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
377 }
378
379 dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
380}
381
382static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
383{
384 dwc3_qcom_enable_wakeup_irq(qcom->hs_phy_irq, 0);
385
386 /*
387 * Configure DP/DM line interrupts based on the USB2 device attached to
388 * the root hub port. When HS/FS device is connected, configure the DP line
389 * as falling edge to detect both disconnect and remote wakeup scenarios. When
390 * LS device is connected, configure DM line as falling edge to detect both
391 * disconnect and remote wakeup. When no device is connected, configure both
392 * DP and DM lines as rising edge to detect HS/HS/LS device connect scenario.
393 */
394
395 if (qcom->usb2_speed == USB_SPEED_LOW) {
396 dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
397 IRQ_TYPE_EDGE_FALLING);
398 } else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
399 (qcom->usb2_speed == USB_SPEED_FULL)) {
400 dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
401 IRQ_TYPE_EDGE_FALLING);
402 } else {
403 dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
404 IRQ_TYPE_EDGE_RISING);
405 dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
406 IRQ_TYPE_EDGE_RISING);
407 }
408
409 dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq, 0);
410}
411
412static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
413{
414 u32 val;
415 int i, ret;
416
417 if (qcom->is_suspended)
418 return 0;
419
420 val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG);
421 if (!(val & PWR_EVNT_LPM_IN_L2_MASK))
422 dev_err(qcom->dev, "HS-PHY not in L2\n");
423
424 for (i = qcom->num_clocks - 1; i >= 0; i--)
425 clk_disable_unprepare(qcom->clks[i]);
426
427 ret = dwc3_qcom_interconnect_disable(qcom);
428 if (ret)
429 dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
430
431 /*
432 * The role is stable during suspend as role switching is done from a
433 * freezable workqueue.
434 */
435 if (dwc3_qcom_is_host(qcom) && wakeup) {
436 qcom->usb2_speed = dwc3_qcom_read_usb2_speed(qcom);
437 dwc3_qcom_enable_interrupts(qcom);
438 }
439
440 qcom->is_suspended = true;
441
442 return 0;
443}
444
445static int dwc3_qcom_resume(struct dwc3_qcom *qcom, bool wakeup)
446{
447 int ret;
448 int i;
449
450 if (!qcom->is_suspended)
451 return 0;
452
453 if (dwc3_qcom_is_host(qcom) && wakeup)
454 dwc3_qcom_disable_interrupts(qcom);
455
456 for (i = 0; i < qcom->num_clocks; i++) {
457 ret = clk_prepare_enable(qcom->clks[i]);
458 if (ret < 0) {
459 while (--i >= 0)
460 clk_disable_unprepare(qcom->clks[i]);
461 return ret;
462 }
463 }
464
465 ret = dwc3_qcom_interconnect_enable(qcom);
466 if (ret)
467 dev_warn(qcom->dev, "failed to enable interconnect: %d\n", ret);
468
469 /* Clear existing events from PHY related to L2 in/out */
470 dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG,
471 PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK);
472
473 qcom->is_suspended = false;
474
475 return 0;
476}
477
478static irqreturn_t qcom_dwc3_resume_irq(int irq, void *data)
479{
480 struct dwc3_qcom *qcom = data;
481 struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
482
483 /* If pm_suspended then let pm_resume take care of resuming h/w */
484 if (qcom->pm_suspended)
485 return IRQ_HANDLED;
486
487 /*
488 * This is safe as role switching is done from a freezable workqueue
489 * and the wakeup interrupts are disabled as part of resume.
490 */
491 if (dwc3_qcom_is_host(qcom))
492 pm_runtime_resume(&dwc->xhci->dev);
493
494 return IRQ_HANDLED;
495}
496
497static void dwc3_qcom_select_utmi_clk(struct dwc3_qcom *qcom)
498{
499 /* Configure dwc3 to use UTMI clock as PIPE clock not present */
500 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
501 PIPE_UTMI_CLK_DIS);
502
503 usleep_range(100, 1000);
504
505 dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
506 PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW);
507
508 usleep_range(100, 1000);
509
510 dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
511 PIPE_UTMI_CLK_DIS);
512}
513
514static int dwc3_qcom_get_irq(struct platform_device *pdev,
515 const char *name, int num)
516{
517 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
518 struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb : pdev;
519 struct device_node *np = pdev->dev.of_node;
520 int ret;
521
522 if (np)
523 ret = platform_get_irq_byname_optional(pdev_irq, name);
524 else
525 ret = platform_get_irq_optional(pdev_irq, num);
526
527 return ret;
528}
529
530static int dwc3_qcom_setup_irq(struct platform_device *pdev)
531{
532 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
533 const struct dwc3_acpi_pdata *pdata = qcom->acpi_pdata;
534 int irq;
535 int ret;
536
537 irq = dwc3_qcom_get_irq(pdev, "hs_phy_irq",
538 pdata ? pdata->hs_phy_irq_index : -1);
539 if (irq > 0) {
540 /* Keep wakeup interrupts disabled until suspend */
541 irq_set_status_flags(irq, IRQ_NOAUTOEN);
542 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
543 qcom_dwc3_resume_irq,
544 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
545 "qcom_dwc3 HS", qcom);
546 if (ret) {
547 dev_err(qcom->dev, "hs_phy_irq failed: %d\n", ret);
548 return ret;
549 }
550 qcom->hs_phy_irq = irq;
551 }
552
553 irq = dwc3_qcom_get_irq(pdev, "dp_hs_phy_irq",
554 pdata ? pdata->dp_hs_phy_irq_index : -1);
555 if (irq > 0) {
556 irq_set_status_flags(irq, IRQ_NOAUTOEN);
557 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
558 qcom_dwc3_resume_irq,
559 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
560 "qcom_dwc3 DP_HS", qcom);
561 if (ret) {
562 dev_err(qcom->dev, "dp_hs_phy_irq failed: %d\n", ret);
563 return ret;
564 }
565 qcom->dp_hs_phy_irq = irq;
566 }
567
568 irq = dwc3_qcom_get_irq(pdev, "dm_hs_phy_irq",
569 pdata ? pdata->dm_hs_phy_irq_index : -1);
570 if (irq > 0) {
571 irq_set_status_flags(irq, IRQ_NOAUTOEN);
572 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
573 qcom_dwc3_resume_irq,
574 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
575 "qcom_dwc3 DM_HS", qcom);
576 if (ret) {
577 dev_err(qcom->dev, "dm_hs_phy_irq failed: %d\n", ret);
578 return ret;
579 }
580 qcom->dm_hs_phy_irq = irq;
581 }
582
583 irq = dwc3_qcom_get_irq(pdev, "ss_phy_irq",
584 pdata ? pdata->ss_phy_irq_index : -1);
585 if (irq > 0) {
586 irq_set_status_flags(irq, IRQ_NOAUTOEN);
587 ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
588 qcom_dwc3_resume_irq,
589 IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
590 "qcom_dwc3 SS", qcom);
591 if (ret) {
592 dev_err(qcom->dev, "ss_phy_irq failed: %d\n", ret);
593 return ret;
594 }
595 qcom->ss_phy_irq = irq;
596 }
597
598 return 0;
599}
600
601static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count)
602{
603 struct device *dev = qcom->dev;
604 struct device_node *np = dev->of_node;
605 int i;
606
607 if (!np || !count)
608 return 0;
609
610 if (count < 0)
611 return count;
612
613 qcom->num_clocks = count;
614
615 qcom->clks = devm_kcalloc(dev, qcom->num_clocks,
616 sizeof(struct clk *), GFP_KERNEL);
617 if (!qcom->clks)
618 return -ENOMEM;
619
620 for (i = 0; i < qcom->num_clocks; i++) {
621 struct clk *clk;
622 int ret;
623
624 clk = of_clk_get(np, i);
625 if (IS_ERR(clk)) {
626 while (--i >= 0)
627 clk_put(qcom->clks[i]);
628 return PTR_ERR(clk);
629 }
630
631 ret = clk_prepare_enable(clk);
632 if (ret < 0) {
633 while (--i >= 0) {
634 clk_disable_unprepare(qcom->clks[i]);
635 clk_put(qcom->clks[i]);
636 }
637 clk_put(clk);
638
639 return ret;
640 }
641
642 qcom->clks[i] = clk;
643 }
644
645 return 0;
646}
647
648static const struct property_entry dwc3_qcom_acpi_properties[] = {
649 PROPERTY_ENTRY_STRING("dr_mode", "host"),
650 {}
651};
652
653static const struct software_node dwc3_qcom_swnode = {
654 .properties = dwc3_qcom_acpi_properties,
655};
656
657static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
658{
659 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
660 struct device *dev = &pdev->dev;
661 struct resource *res, *child_res = NULL;
662 struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb :
663 pdev;
664 int irq;
665 int ret;
666
667 qcom->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
668 if (!qcom->dwc3)
669 return -ENOMEM;
670
671 qcom->dwc3->dev.parent = dev;
672 qcom->dwc3->dev.type = dev->type;
673 qcom->dwc3->dev.dma_mask = dev->dma_mask;
674 qcom->dwc3->dev.dma_parms = dev->dma_parms;
675 qcom->dwc3->dev.coherent_dma_mask = dev->coherent_dma_mask;
676
677 child_res = kcalloc(2, sizeof(*child_res), GFP_KERNEL);
678 if (!child_res) {
679 platform_device_put(qcom->dwc3);
680 return -ENOMEM;
681 }
682
683 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
684 if (!res) {
685 dev_err(&pdev->dev, "failed to get memory resource\n");
686 ret = -ENODEV;
687 goto out;
688 }
689
690 child_res[0].flags = res->flags;
691 child_res[0].start = res->start;
692 child_res[0].end = child_res[0].start +
693 qcom->acpi_pdata->dwc3_core_base_size;
694
695 irq = platform_get_irq(pdev_irq, 0);
696 if (irq < 0) {
697 ret = irq;
698 goto out;
699 }
700 child_res[1].flags = IORESOURCE_IRQ;
701 child_res[1].start = child_res[1].end = irq;
702
703 ret = platform_device_add_resources(qcom->dwc3, child_res, 2);
704 if (ret) {
705 dev_err(&pdev->dev, "failed to add resources\n");
706 goto out;
707 }
708
709 ret = device_add_software_node(&qcom->dwc3->dev, &dwc3_qcom_swnode);
710 if (ret < 0) {
711 dev_err(&pdev->dev, "failed to add properties\n");
712 goto out;
713 }
714
715 ret = platform_device_add(qcom->dwc3);
716 if (ret) {
717 dev_err(&pdev->dev, "failed to add device\n");
718 device_remove_software_node(&qcom->dwc3->dev);
719 goto out;
720 }
721 kfree(child_res);
722 return 0;
723
724out:
725 platform_device_put(qcom->dwc3);
726 kfree(child_res);
727 return ret;
728}
729
730static int dwc3_qcom_of_register_core(struct platform_device *pdev)
731{
732 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
733 struct device_node *np = pdev->dev.of_node, *dwc3_np;
734 struct device *dev = &pdev->dev;
735 int ret;
736
737 dwc3_np = of_get_compatible_child(np, "snps,dwc3");
738 if (!dwc3_np) {
739 dev_err(dev, "failed to find dwc3 core child\n");
740 return -ENODEV;
741 }
742
743 ret = of_platform_populate(np, NULL, NULL, dev);
744 if (ret) {
745 dev_err(dev, "failed to register dwc3 core - %d\n", ret);
746 goto node_put;
747 }
748
749 qcom->dwc3 = of_find_device_by_node(dwc3_np);
750 if (!qcom->dwc3) {
751 ret = -ENODEV;
752 dev_err(dev, "failed to get dwc3 platform device\n");
753 }
754
755node_put:
756 of_node_put(dwc3_np);
757
758 return ret;
759}
760
761static struct platform_device *
762dwc3_qcom_create_urs_usb_platdev(struct device *dev)
763{
764 struct fwnode_handle *fwh;
765 struct acpi_device *adev;
766 char name[8];
767 int ret;
768 int id;
769
770 /* Figure out device id */
771 ret = sscanf(fwnode_get_name(dev->fwnode), "URS%d", &id);
772 if (!ret)
773 return NULL;
774
775 /* Find the child using name */
776 snprintf(name, sizeof(name), "USB%d", id);
777 fwh = fwnode_get_named_child_node(dev->fwnode, name);
778 if (!fwh)
779 return NULL;
780
781 adev = to_acpi_device_node(fwh);
782 if (!adev)
783 return NULL;
784
785 return acpi_create_platform_device(adev, NULL);
786}
787
788static int dwc3_qcom_probe(struct platform_device *pdev)
789{
790 struct device_node *np = pdev->dev.of_node;
791 struct device *dev = &pdev->dev;
792 struct dwc3_qcom *qcom;
793 struct resource *res, *parent_res = NULL;
794 int ret, i;
795 bool ignore_pipe_clk;
796 bool wakeup_source;
797
798 qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);
799 if (!qcom)
800 return -ENOMEM;
801
802 platform_set_drvdata(pdev, qcom);
803 qcom->dev = &pdev->dev;
804
805 if (has_acpi_companion(dev)) {
806 qcom->acpi_pdata = acpi_device_get_match_data(dev);
807 if (!qcom->acpi_pdata) {
808 dev_err(&pdev->dev, "no supporting ACPI device data\n");
809 return -EINVAL;
810 }
811 }
812
813 qcom->resets = devm_reset_control_array_get_optional_exclusive(dev);
814 if (IS_ERR(qcom->resets)) {
815 ret = PTR_ERR(qcom->resets);
816 dev_err(&pdev->dev, "failed to get resets, err=%d\n", ret);
817 return ret;
818 }
819
820 ret = reset_control_assert(qcom->resets);
821 if (ret) {
822 dev_err(&pdev->dev, "failed to assert resets, err=%d\n", ret);
823 return ret;
824 }
825
826 usleep_range(10, 1000);
827
828 ret = reset_control_deassert(qcom->resets);
829 if (ret) {
830 dev_err(&pdev->dev, "failed to deassert resets, err=%d\n", ret);
831 goto reset_assert;
832 }
833
834 ret = dwc3_qcom_clk_init(qcom, of_clk_get_parent_count(np));
835 if (ret) {
836 dev_err(dev, "failed to get clocks\n");
837 goto reset_assert;
838 }
839
840 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
841
842 if (np) {
843 parent_res = res;
844 } else {
845 parent_res = kmemdup(res, sizeof(struct resource), GFP_KERNEL);
846 if (!parent_res)
847 return -ENOMEM;
848
849 parent_res->start = res->start +
850 qcom->acpi_pdata->qscratch_base_offset;
851 parent_res->end = parent_res->start +
852 qcom->acpi_pdata->qscratch_base_size;
853
854 if (qcom->acpi_pdata->is_urs) {
855 qcom->urs_usb = dwc3_qcom_create_urs_usb_platdev(dev);
856 if (IS_ERR_OR_NULL(qcom->urs_usb)) {
857 dev_err(dev, "failed to create URS USB platdev\n");
858 if (!qcom->urs_usb)
859 return -ENODEV;
860 else
861 return PTR_ERR(qcom->urs_usb);
862 }
863 }
864 }
865
866 qcom->qscratch_base = devm_ioremap_resource(dev, parent_res);
867 if (IS_ERR(qcom->qscratch_base)) {
868 ret = PTR_ERR(qcom->qscratch_base);
869 goto clk_disable;
870 }
871
872 ret = dwc3_qcom_setup_irq(pdev);
873 if (ret) {
874 dev_err(dev, "failed to setup IRQs, err=%d\n", ret);
875 goto clk_disable;
876 }
877
878 /*
879 * Disable pipe_clk requirement if specified. Used when dwc3
880 * operates without SSPHY and only HS/FS/LS modes are supported.
881 */
882 ignore_pipe_clk = device_property_read_bool(dev,
883 "qcom,select-utmi-as-pipe-clk");
884 if (ignore_pipe_clk)
885 dwc3_qcom_select_utmi_clk(qcom);
886
887 if (np)
888 ret = dwc3_qcom_of_register_core(pdev);
889 else
890 ret = dwc3_qcom_acpi_register_core(pdev);
891
892 if (ret) {
893 dev_err(dev, "failed to register DWC3 Core, err=%d\n", ret);
894 goto depopulate;
895 }
896
897 ret = dwc3_qcom_interconnect_init(qcom);
898 if (ret)
899 goto depopulate;
900
901 qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev);
902
903 /* enable vbus override for device mode */
904 if (qcom->mode != USB_DR_MODE_HOST)
905 dwc3_qcom_vbus_override_enable(qcom, true);
906
907 /* register extcon to override sw_vbus on Vbus change later */
908 ret = dwc3_qcom_register_extcon(qcom);
909 if (ret)
910 goto interconnect_exit;
911
912 wakeup_source = of_property_read_bool(dev->of_node, "wakeup-source");
913 device_init_wakeup(&pdev->dev, wakeup_source);
914 device_init_wakeup(&qcom->dwc3->dev, wakeup_source);
915
916 qcom->is_suspended = false;
917 pm_runtime_set_active(dev);
918 pm_runtime_enable(dev);
919 pm_runtime_forbid(dev);
920
921 return 0;
922
923interconnect_exit:
924 dwc3_qcom_interconnect_exit(qcom);
925depopulate:
926 if (np)
927 of_platform_depopulate(&pdev->dev);
928 else
929 platform_device_put(pdev);
930clk_disable:
931 for (i = qcom->num_clocks - 1; i >= 0; i--) {
932 clk_disable_unprepare(qcom->clks[i]);
933 clk_put(qcom->clks[i]);
934 }
935reset_assert:
936 reset_control_assert(qcom->resets);
937
938 return ret;
939}
940
941static int dwc3_qcom_remove(struct platform_device *pdev)
942{
943 struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
944 struct device *dev = &pdev->dev;
945 int i;
946
947 device_remove_software_node(&qcom->dwc3->dev);
948 of_platform_depopulate(dev);
949
950 for (i = qcom->num_clocks - 1; i >= 0; i--) {
951 clk_disable_unprepare(qcom->clks[i]);
952 clk_put(qcom->clks[i]);
953 }
954 qcom->num_clocks = 0;
955
956 dwc3_qcom_interconnect_exit(qcom);
957 reset_control_assert(qcom->resets);
958
959 pm_runtime_allow(dev);
960 pm_runtime_disable(dev);
961
962 return 0;
963}
964
965static int __maybe_unused dwc3_qcom_pm_suspend(struct device *dev)
966{
967 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
968 bool wakeup = device_may_wakeup(dev);
969 int ret;
970
971 ret = dwc3_qcom_suspend(qcom, wakeup);
972 if (ret)
973 return ret;
974
975 qcom->pm_suspended = true;
976
977 return 0;
978}
979
980static int __maybe_unused dwc3_qcom_pm_resume(struct device *dev)
981{
982 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
983 bool wakeup = device_may_wakeup(dev);
984 int ret;
985
986 ret = dwc3_qcom_resume(qcom, wakeup);
987 if (ret)
988 return ret;
989
990 qcom->pm_suspended = false;
991
992 return 0;
993}
994
995static int __maybe_unused dwc3_qcom_runtime_suspend(struct device *dev)
996{
997 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
998
999 return dwc3_qcom_suspend(qcom, true);
1000}
1001
1002static int __maybe_unused dwc3_qcom_runtime_resume(struct device *dev)
1003{
1004 struct dwc3_qcom *qcom = dev_get_drvdata(dev);
1005
1006 return dwc3_qcom_resume(qcom, true);
1007}
1008
1009static const struct dev_pm_ops dwc3_qcom_dev_pm_ops = {
1010 SET_SYSTEM_SLEEP_PM_OPS(dwc3_qcom_pm_suspend, dwc3_qcom_pm_resume)
1011 SET_RUNTIME_PM_OPS(dwc3_qcom_runtime_suspend, dwc3_qcom_runtime_resume,
1012 NULL)
1013};
1014
1015static const struct of_device_id dwc3_qcom_of_match[] = {
1016 { .compatible = "qcom,dwc3" },
1017 { }
1018};
1019MODULE_DEVICE_TABLE(of, dwc3_qcom_of_match);
1020
1021#ifdef CONFIG_ACPI
1022static const struct dwc3_acpi_pdata sdm845_acpi_pdata = {
1023 .qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
1024 .qscratch_base_size = SDM845_QSCRATCH_SIZE,
1025 .dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
1026 .hs_phy_irq_index = 1,
1027 .dp_hs_phy_irq_index = 4,
1028 .dm_hs_phy_irq_index = 3,
1029 .ss_phy_irq_index = 2
1030};
1031
1032static const struct dwc3_acpi_pdata sdm845_acpi_urs_pdata = {
1033 .qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
1034 .qscratch_base_size = SDM845_QSCRATCH_SIZE,
1035 .dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
1036 .hs_phy_irq_index = 1,
1037 .dp_hs_phy_irq_index = 4,
1038 .dm_hs_phy_irq_index = 3,
1039 .ss_phy_irq_index = 2,
1040 .is_urs = true,
1041};
1042
1043static const struct acpi_device_id dwc3_qcom_acpi_match[] = {
1044 { "QCOM2430", (unsigned long)&sdm845_acpi_pdata },
1045 { "QCOM0304", (unsigned long)&sdm845_acpi_urs_pdata },
1046 { "QCOM0497", (unsigned long)&sdm845_acpi_urs_pdata },
1047 { "QCOM04A6", (unsigned long)&sdm845_acpi_pdata },
1048 { },
1049};
1050MODULE_DEVICE_TABLE(acpi, dwc3_qcom_acpi_match);
1051#endif
1052
1053static struct platform_driver dwc3_qcom_driver = {
1054 .probe = dwc3_qcom_probe,
1055 .remove = dwc3_qcom_remove,
1056 .driver = {
1057 .name = "dwc3-qcom",
1058 .pm = &dwc3_qcom_dev_pm_ops,
1059 .of_match_table = dwc3_qcom_of_match,
1060 .acpi_match_table = ACPI_PTR(dwc3_qcom_acpi_match),
1061 },
1062};
1063
1064module_platform_driver(dwc3_qcom_driver);
1065
1066MODULE_LICENSE("GPL v2");
1067MODULE_DESCRIPTION("DesignWare DWC3 QCOM Glue Driver");