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1/*
2 * core.c - DesignWare HS OTG Controller common routines
3 *
4 * Copyright (C) 2004-2013 Synopsys, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions, and the following disclaimer,
11 * without modification.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The names of the above-listed copyright holders may not be used
16 * to endorse or promote products derived from this software without
17 * specific prior written permission.
18 *
19 * ALTERNATIVELY, this software may be distributed under the terms of the
20 * GNU General Public License ("GPL") as published by the Free Software
21 * Foundation; either version 2 of the License, or (at your option) any
22 * later version.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37/*
38 * The Core code provides basic services for accessing and managing the
39 * DWC_otg hardware. These services are used by both the Host Controller
40 * Driver and the Peripheral Controller Driver.
41 */
42#include <linux/kernel.h>
43#include <linux/module.h>
44#include <linux/moduleparam.h>
45#include <linux/spinlock.h>
46#include <linux/interrupt.h>
47#include <linux/dma-mapping.h>
48#include <linux/delay.h>
49#include <linux/io.h>
50#include <linux/slab.h>
51#include <linux/usb.h>
52
53#include <linux/usb/hcd.h>
54#include <linux/usb/ch11.h>
55
56#include "core.h"
57#include "hcd.h"
58
59/**
60 * dwc2_backup_global_registers() - Backup global controller registers.
61 * When suspending usb bus, registers needs to be backuped
62 * if controller power is disabled once suspended.
63 *
64 * @hsotg: Programming view of the DWC_otg controller
65 */
66static int dwc2_backup_global_registers(struct dwc2_hsotg *hsotg)
67{
68 struct dwc2_gregs_backup *gr;
69 int i;
70
71 /* Backup global regs */
72 gr = &hsotg->gr_backup;
73
74 gr->gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
75 gr->gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
76 gr->gahbcfg = dwc2_readl(hsotg->regs + GAHBCFG);
77 gr->gusbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
78 gr->grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
79 gr->gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
80 gr->hptxfsiz = dwc2_readl(hsotg->regs + HPTXFSIZ);
81 gr->gdfifocfg = dwc2_readl(hsotg->regs + GDFIFOCFG);
82 for (i = 0; i < MAX_EPS_CHANNELS; i++)
83 gr->dtxfsiz[i] = dwc2_readl(hsotg->regs + DPTXFSIZN(i));
84
85 gr->valid = true;
86 return 0;
87}
88
89/**
90 * dwc2_restore_global_registers() - Restore controller global registers.
91 * When resuming usb bus, device registers needs to be restored
92 * if controller power were disabled.
93 *
94 * @hsotg: Programming view of the DWC_otg controller
95 */
96static int dwc2_restore_global_registers(struct dwc2_hsotg *hsotg)
97{
98 struct dwc2_gregs_backup *gr;
99 int i;
100
101 dev_dbg(hsotg->dev, "%s\n", __func__);
102
103 /* Restore global regs */
104 gr = &hsotg->gr_backup;
105 if (!gr->valid) {
106 dev_err(hsotg->dev, "%s: no global registers to restore\n",
107 __func__);
108 return -EINVAL;
109 }
110 gr->valid = false;
111
112 dwc2_writel(0xffffffff, hsotg->regs + GINTSTS);
113 dwc2_writel(gr->gotgctl, hsotg->regs + GOTGCTL);
114 dwc2_writel(gr->gintmsk, hsotg->regs + GINTMSK);
115 dwc2_writel(gr->gusbcfg, hsotg->regs + GUSBCFG);
116 dwc2_writel(gr->gahbcfg, hsotg->regs + GAHBCFG);
117 dwc2_writel(gr->grxfsiz, hsotg->regs + GRXFSIZ);
118 dwc2_writel(gr->gnptxfsiz, hsotg->regs + GNPTXFSIZ);
119 dwc2_writel(gr->hptxfsiz, hsotg->regs + HPTXFSIZ);
120 dwc2_writel(gr->gdfifocfg, hsotg->regs + GDFIFOCFG);
121 for (i = 0; i < MAX_EPS_CHANNELS; i++)
122 dwc2_writel(gr->dtxfsiz[i], hsotg->regs + DPTXFSIZN(i));
123
124 return 0;
125}
126
127/**
128 * dwc2_exit_hibernation() - Exit controller from Partial Power Down.
129 *
130 * @hsotg: Programming view of the DWC_otg controller
131 * @restore: Controller registers need to be restored
132 */
133int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore)
134{
135 u32 pcgcctl;
136 int ret = 0;
137
138 if (!hsotg->core_params->hibernation)
139 return -ENOTSUPP;
140
141 pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);
142 pcgcctl &= ~PCGCTL_STOPPCLK;
143 dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
144
145 pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);
146 pcgcctl &= ~PCGCTL_PWRCLMP;
147 dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
148
149 pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);
150 pcgcctl &= ~PCGCTL_RSTPDWNMODULE;
151 dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
152
153 udelay(100);
154 if (restore) {
155 ret = dwc2_restore_global_registers(hsotg);
156 if (ret) {
157 dev_err(hsotg->dev, "%s: failed to restore registers\n",
158 __func__);
159 return ret;
160 }
161 if (dwc2_is_host_mode(hsotg)) {
162 ret = dwc2_restore_host_registers(hsotg);
163 if (ret) {
164 dev_err(hsotg->dev, "%s: failed to restore host registers\n",
165 __func__);
166 return ret;
167 }
168 } else {
169 ret = dwc2_restore_device_registers(hsotg);
170 if (ret) {
171 dev_err(hsotg->dev, "%s: failed to restore device registers\n",
172 __func__);
173 return ret;
174 }
175 }
176 }
177
178 return ret;
179}
180
181/**
182 * dwc2_enter_hibernation() - Put controller in Partial Power Down.
183 *
184 * @hsotg: Programming view of the DWC_otg controller
185 */
186int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg)
187{
188 u32 pcgcctl;
189 int ret = 0;
190
191 if (!hsotg->core_params->hibernation)
192 return -ENOTSUPP;
193
194 /* Backup all registers */
195 ret = dwc2_backup_global_registers(hsotg);
196 if (ret) {
197 dev_err(hsotg->dev, "%s: failed to backup global registers\n",
198 __func__);
199 return ret;
200 }
201
202 if (dwc2_is_host_mode(hsotg)) {
203 ret = dwc2_backup_host_registers(hsotg);
204 if (ret) {
205 dev_err(hsotg->dev, "%s: failed to backup host registers\n",
206 __func__);
207 return ret;
208 }
209 } else {
210 ret = dwc2_backup_device_registers(hsotg);
211 if (ret) {
212 dev_err(hsotg->dev, "%s: failed to backup device registers\n",
213 __func__);
214 return ret;
215 }
216 }
217
218 /*
219 * Clear any pending interrupts since dwc2 will not be able to
220 * clear them after entering hibernation.
221 */
222 dwc2_writel(0xffffffff, hsotg->regs + GINTSTS);
223
224 /* Put the controller in low power state */
225 pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);
226
227 pcgcctl |= PCGCTL_PWRCLMP;
228 dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
229 ndelay(20);
230
231 pcgcctl |= PCGCTL_RSTPDWNMODULE;
232 dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
233 ndelay(20);
234
235 pcgcctl |= PCGCTL_STOPPCLK;
236 dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
237
238 return ret;
239}
240
241/*
242 * Do core a soft reset of the core. Be careful with this because it
243 * resets all the internal state machines of the core.
244 */
245int dwc2_core_reset(struct dwc2_hsotg *hsotg)
246{
247 u32 greset;
248 int count = 0;
249
250 dev_vdbg(hsotg->dev, "%s()\n", __func__);
251
252 /* Core Soft Reset */
253 greset = dwc2_readl(hsotg->regs + GRSTCTL);
254 greset |= GRSTCTL_CSFTRST;
255 dwc2_writel(greset, hsotg->regs + GRSTCTL);
256 do {
257 udelay(1);
258 greset = dwc2_readl(hsotg->regs + GRSTCTL);
259 if (++count > 50) {
260 dev_warn(hsotg->dev,
261 "%s() HANG! Soft Reset GRSTCTL=%0x\n",
262 __func__, greset);
263 return -EBUSY;
264 }
265 } while (greset & GRSTCTL_CSFTRST);
266
267 /* Wait for AHB master IDLE state */
268 count = 0;
269 do {
270 udelay(1);
271 greset = dwc2_readl(hsotg->regs + GRSTCTL);
272 if (++count > 50) {
273 dev_warn(hsotg->dev,
274 "%s() HANG! AHB Idle GRSTCTL=%0x\n",
275 __func__, greset);
276 return -EBUSY;
277 }
278 } while (!(greset & GRSTCTL_AHBIDLE));
279
280 return 0;
281}
282
283/*
284 * Force the mode of the controller.
285 *
286 * Forcing the mode is needed for two cases:
287 *
288 * 1) If the dr_mode is set to either HOST or PERIPHERAL we force the
289 * controller to stay in a particular mode regardless of ID pin
290 * changes. We do this usually after a core reset.
291 *
292 * 2) During probe we want to read reset values of the hw
293 * configuration registers that are only available in either host or
294 * device mode. We may need to force the mode if the current mode does
295 * not allow us to access the register in the mode that we want.
296 *
297 * In either case it only makes sense to force the mode if the
298 * controller hardware is OTG capable.
299 *
300 * Checks are done in this function to determine whether doing a force
301 * would be valid or not.
302 *
303 * If a force is done, it requires a 25ms delay to take effect.
304 *
305 * Returns true if the mode was forced.
306 */
307static bool dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host)
308{
309 u32 gusbcfg;
310 u32 set;
311 u32 clear;
312
313 dev_dbg(hsotg->dev, "Forcing mode to %s\n", host ? "host" : "device");
314
315 /*
316 * Force mode has no effect if the hardware is not OTG.
317 */
318 if (!dwc2_hw_is_otg(hsotg))
319 return false;
320
321 /*
322 * If dr_mode is either peripheral or host only, there is no
323 * need to ever force the mode to the opposite mode.
324 */
325 if (WARN_ON(host && hsotg->dr_mode == USB_DR_MODE_PERIPHERAL))
326 return false;
327
328 if (WARN_ON(!host && hsotg->dr_mode == USB_DR_MODE_HOST))
329 return false;
330
331 gusbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
332
333 set = host ? GUSBCFG_FORCEHOSTMODE : GUSBCFG_FORCEDEVMODE;
334 clear = host ? GUSBCFG_FORCEDEVMODE : GUSBCFG_FORCEHOSTMODE;
335
336 gusbcfg &= ~clear;
337 gusbcfg |= set;
338 dwc2_writel(gusbcfg, hsotg->regs + GUSBCFG);
339
340 msleep(25);
341 return true;
342}
343
344/*
345 * Clears the force mode bits.
346 */
347static void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg)
348{
349 u32 gusbcfg;
350
351 gusbcfg = dwc2_readl(hsotg->regs + GUSBCFG);
352 gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
353 gusbcfg &= ~GUSBCFG_FORCEDEVMODE;
354 dwc2_writel(gusbcfg, hsotg->regs + GUSBCFG);
355
356 /*
357 * NOTE: This long sleep is _very_ important, otherwise the core will
358 * not stay in host mode after a connector ID change!
359 */
360 msleep(25);
361}
362
363/*
364 * Sets or clears force mode based on the dr_mode parameter.
365 */
366void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg)
367{
368 switch (hsotg->dr_mode) {
369 case USB_DR_MODE_HOST:
370 dwc2_force_mode(hsotg, true);
371 break;
372 case USB_DR_MODE_PERIPHERAL:
373 dwc2_force_mode(hsotg, false);
374 break;
375 case USB_DR_MODE_OTG:
376 dwc2_clear_force_mode(hsotg);
377 break;
378 default:
379 dev_warn(hsotg->dev, "%s() Invalid dr_mode=%d\n",
380 __func__, hsotg->dr_mode);
381 break;
382 }
383
384 /*
385 * NOTE: This is required for some rockchip soc based
386 * platforms.
387 */
388 msleep(50);
389}
390
391/*
392 * Do core a soft reset of the core. Be careful with this because it
393 * resets all the internal state machines of the core.
394 *
395 * Additionally this will apply force mode as per the hsotg->dr_mode
396 * parameter.
397 */
398int dwc2_core_reset_and_force_dr_mode(struct dwc2_hsotg *hsotg)
399{
400 int retval;
401
402 retval = dwc2_core_reset(hsotg);
403 if (retval)
404 return retval;
405
406 dwc2_force_dr_mode(hsotg);
407 return 0;
408}
409
410/**
411 * dwc2_dump_host_registers() - Prints the host registers
412 *
413 * @hsotg: Programming view of DWC_otg controller
414 *
415 * NOTE: This function will be removed once the peripheral controller code
416 * is integrated and the driver is stable
417 */
418void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg)
419{
420#ifdef DEBUG
421 u32 __iomem *addr;
422 int i;
423
424 dev_dbg(hsotg->dev, "Host Global Registers\n");
425 addr = hsotg->regs + HCFG;
426 dev_dbg(hsotg->dev, "HCFG @0x%08lX : 0x%08X\n",
427 (unsigned long)addr, dwc2_readl(addr));
428 addr = hsotg->regs + HFIR;
429 dev_dbg(hsotg->dev, "HFIR @0x%08lX : 0x%08X\n",
430 (unsigned long)addr, dwc2_readl(addr));
431 addr = hsotg->regs + HFNUM;
432 dev_dbg(hsotg->dev, "HFNUM @0x%08lX : 0x%08X\n",
433 (unsigned long)addr, dwc2_readl(addr));
434 addr = hsotg->regs + HPTXSTS;
435 dev_dbg(hsotg->dev, "HPTXSTS @0x%08lX : 0x%08X\n",
436 (unsigned long)addr, dwc2_readl(addr));
437 addr = hsotg->regs + HAINT;
438 dev_dbg(hsotg->dev, "HAINT @0x%08lX : 0x%08X\n",
439 (unsigned long)addr, dwc2_readl(addr));
440 addr = hsotg->regs + HAINTMSK;
441 dev_dbg(hsotg->dev, "HAINTMSK @0x%08lX : 0x%08X\n",
442 (unsigned long)addr, dwc2_readl(addr));
443 if (hsotg->core_params->dma_desc_enable > 0) {
444 addr = hsotg->regs + HFLBADDR;
445 dev_dbg(hsotg->dev, "HFLBADDR @0x%08lX : 0x%08X\n",
446 (unsigned long)addr, dwc2_readl(addr));
447 }
448
449 addr = hsotg->regs + HPRT0;
450 dev_dbg(hsotg->dev, "HPRT0 @0x%08lX : 0x%08X\n",
451 (unsigned long)addr, dwc2_readl(addr));
452
453 for (i = 0; i < hsotg->core_params->host_channels; i++) {
454 dev_dbg(hsotg->dev, "Host Channel %d Specific Registers\n", i);
455 addr = hsotg->regs + HCCHAR(i);
456 dev_dbg(hsotg->dev, "HCCHAR @0x%08lX : 0x%08X\n",
457 (unsigned long)addr, dwc2_readl(addr));
458 addr = hsotg->regs + HCSPLT(i);
459 dev_dbg(hsotg->dev, "HCSPLT @0x%08lX : 0x%08X\n",
460 (unsigned long)addr, dwc2_readl(addr));
461 addr = hsotg->regs + HCINT(i);
462 dev_dbg(hsotg->dev, "HCINT @0x%08lX : 0x%08X\n",
463 (unsigned long)addr, dwc2_readl(addr));
464 addr = hsotg->regs + HCINTMSK(i);
465 dev_dbg(hsotg->dev, "HCINTMSK @0x%08lX : 0x%08X\n",
466 (unsigned long)addr, dwc2_readl(addr));
467 addr = hsotg->regs + HCTSIZ(i);
468 dev_dbg(hsotg->dev, "HCTSIZ @0x%08lX : 0x%08X\n",
469 (unsigned long)addr, dwc2_readl(addr));
470 addr = hsotg->regs + HCDMA(i);
471 dev_dbg(hsotg->dev, "HCDMA @0x%08lX : 0x%08X\n",
472 (unsigned long)addr, dwc2_readl(addr));
473 if (hsotg->core_params->dma_desc_enable > 0) {
474 addr = hsotg->regs + HCDMAB(i);
475 dev_dbg(hsotg->dev, "HCDMAB @0x%08lX : 0x%08X\n",
476 (unsigned long)addr, dwc2_readl(addr));
477 }
478 }
479#endif
480}
481
482/**
483 * dwc2_dump_global_registers() - Prints the core global registers
484 *
485 * @hsotg: Programming view of DWC_otg controller
486 *
487 * NOTE: This function will be removed once the peripheral controller code
488 * is integrated and the driver is stable
489 */
490void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg)
491{
492#ifdef DEBUG
493 u32 __iomem *addr;
494
495 dev_dbg(hsotg->dev, "Core Global Registers\n");
496 addr = hsotg->regs + GOTGCTL;
497 dev_dbg(hsotg->dev, "GOTGCTL @0x%08lX : 0x%08X\n",
498 (unsigned long)addr, dwc2_readl(addr));
499 addr = hsotg->regs + GOTGINT;
500 dev_dbg(hsotg->dev, "GOTGINT @0x%08lX : 0x%08X\n",
501 (unsigned long)addr, dwc2_readl(addr));
502 addr = hsotg->regs + GAHBCFG;
503 dev_dbg(hsotg->dev, "GAHBCFG @0x%08lX : 0x%08X\n",
504 (unsigned long)addr, dwc2_readl(addr));
505 addr = hsotg->regs + GUSBCFG;
506 dev_dbg(hsotg->dev, "GUSBCFG @0x%08lX : 0x%08X\n",
507 (unsigned long)addr, dwc2_readl(addr));
508 addr = hsotg->regs + GRSTCTL;
509 dev_dbg(hsotg->dev, "GRSTCTL @0x%08lX : 0x%08X\n",
510 (unsigned long)addr, dwc2_readl(addr));
511 addr = hsotg->regs + GINTSTS;
512 dev_dbg(hsotg->dev, "GINTSTS @0x%08lX : 0x%08X\n",
513 (unsigned long)addr, dwc2_readl(addr));
514 addr = hsotg->regs + GINTMSK;
515 dev_dbg(hsotg->dev, "GINTMSK @0x%08lX : 0x%08X\n",
516 (unsigned long)addr, dwc2_readl(addr));
517 addr = hsotg->regs + GRXSTSR;
518 dev_dbg(hsotg->dev, "GRXSTSR @0x%08lX : 0x%08X\n",
519 (unsigned long)addr, dwc2_readl(addr));
520 addr = hsotg->regs + GRXFSIZ;
521 dev_dbg(hsotg->dev, "GRXFSIZ @0x%08lX : 0x%08X\n",
522 (unsigned long)addr, dwc2_readl(addr));
523 addr = hsotg->regs + GNPTXFSIZ;
524 dev_dbg(hsotg->dev, "GNPTXFSIZ @0x%08lX : 0x%08X\n",
525 (unsigned long)addr, dwc2_readl(addr));
526 addr = hsotg->regs + GNPTXSTS;
527 dev_dbg(hsotg->dev, "GNPTXSTS @0x%08lX : 0x%08X\n",
528 (unsigned long)addr, dwc2_readl(addr));
529 addr = hsotg->regs + GI2CCTL;
530 dev_dbg(hsotg->dev, "GI2CCTL @0x%08lX : 0x%08X\n",
531 (unsigned long)addr, dwc2_readl(addr));
532 addr = hsotg->regs + GPVNDCTL;
533 dev_dbg(hsotg->dev, "GPVNDCTL @0x%08lX : 0x%08X\n",
534 (unsigned long)addr, dwc2_readl(addr));
535 addr = hsotg->regs + GGPIO;
536 dev_dbg(hsotg->dev, "GGPIO @0x%08lX : 0x%08X\n",
537 (unsigned long)addr, dwc2_readl(addr));
538 addr = hsotg->regs + GUID;
539 dev_dbg(hsotg->dev, "GUID @0x%08lX : 0x%08X\n",
540 (unsigned long)addr, dwc2_readl(addr));
541 addr = hsotg->regs + GSNPSID;
542 dev_dbg(hsotg->dev, "GSNPSID @0x%08lX : 0x%08X\n",
543 (unsigned long)addr, dwc2_readl(addr));
544 addr = hsotg->regs + GHWCFG1;
545 dev_dbg(hsotg->dev, "GHWCFG1 @0x%08lX : 0x%08X\n",
546 (unsigned long)addr, dwc2_readl(addr));
547 addr = hsotg->regs + GHWCFG2;
548 dev_dbg(hsotg->dev, "GHWCFG2 @0x%08lX : 0x%08X\n",
549 (unsigned long)addr, dwc2_readl(addr));
550 addr = hsotg->regs + GHWCFG3;
551 dev_dbg(hsotg->dev, "GHWCFG3 @0x%08lX : 0x%08X\n",
552 (unsigned long)addr, dwc2_readl(addr));
553 addr = hsotg->regs + GHWCFG4;
554 dev_dbg(hsotg->dev, "GHWCFG4 @0x%08lX : 0x%08X\n",
555 (unsigned long)addr, dwc2_readl(addr));
556 addr = hsotg->regs + GLPMCFG;
557 dev_dbg(hsotg->dev, "GLPMCFG @0x%08lX : 0x%08X\n",
558 (unsigned long)addr, dwc2_readl(addr));
559 addr = hsotg->regs + GPWRDN;
560 dev_dbg(hsotg->dev, "GPWRDN @0x%08lX : 0x%08X\n",
561 (unsigned long)addr, dwc2_readl(addr));
562 addr = hsotg->regs + GDFIFOCFG;
563 dev_dbg(hsotg->dev, "GDFIFOCFG @0x%08lX : 0x%08X\n",
564 (unsigned long)addr, dwc2_readl(addr));
565 addr = hsotg->regs + HPTXFSIZ;
566 dev_dbg(hsotg->dev, "HPTXFSIZ @0x%08lX : 0x%08X\n",
567 (unsigned long)addr, dwc2_readl(addr));
568
569 addr = hsotg->regs + PCGCTL;
570 dev_dbg(hsotg->dev, "PCGCTL @0x%08lX : 0x%08X\n",
571 (unsigned long)addr, dwc2_readl(addr));
572#endif
573}
574
575/**
576 * dwc2_flush_tx_fifo() - Flushes a Tx FIFO
577 *
578 * @hsotg: Programming view of DWC_otg controller
579 * @num: Tx FIFO to flush
580 */
581void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
582{
583 u32 greset;
584 int count = 0;
585
586 dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num);
587
588 greset = GRSTCTL_TXFFLSH;
589 greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK;
590 dwc2_writel(greset, hsotg->regs + GRSTCTL);
591
592 do {
593 greset = dwc2_readl(hsotg->regs + GRSTCTL);
594 if (++count > 10000) {
595 dev_warn(hsotg->dev,
596 "%s() HANG! GRSTCTL=%0x GNPTXSTS=0x%08x\n",
597 __func__, greset,
598 dwc2_readl(hsotg->regs + GNPTXSTS));
599 break;
600 }
601 udelay(1);
602 } while (greset & GRSTCTL_TXFFLSH);
603
604 /* Wait for at least 3 PHY Clocks */
605 udelay(1);
606}
607
608/**
609 * dwc2_flush_rx_fifo() - Flushes the Rx FIFO
610 *
611 * @hsotg: Programming view of DWC_otg controller
612 */
613void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg)
614{
615 u32 greset;
616 int count = 0;
617
618 dev_vdbg(hsotg->dev, "%s()\n", __func__);
619
620 greset = GRSTCTL_RXFFLSH;
621 dwc2_writel(greset, hsotg->regs + GRSTCTL);
622
623 do {
624 greset = dwc2_readl(hsotg->regs + GRSTCTL);
625 if (++count > 10000) {
626 dev_warn(hsotg->dev, "%s() HANG! GRSTCTL=%0x\n",
627 __func__, greset);
628 break;
629 }
630 udelay(1);
631 } while (greset & GRSTCTL_RXFFLSH);
632
633 /* Wait for at least 3 PHY Clocks */
634 udelay(1);
635}
636
637#define DWC2_OUT_OF_BOUNDS(a, b, c) ((a) < (b) || (a) > (c))
638
639/* Parameter access functions */
640void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
641{
642 int valid = 1;
643
644 switch (val) {
645 case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
646 if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
647 valid = 0;
648 break;
649 case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
650 switch (hsotg->hw_params.op_mode) {
651 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
652 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
653 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
654 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
655 break;
656 default:
657 valid = 0;
658 break;
659 }
660 break;
661 case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
662 /* always valid */
663 break;
664 default:
665 valid = 0;
666 break;
667 }
668
669 if (!valid) {
670 if (val >= 0)
671 dev_err(hsotg->dev,
672 "%d invalid for otg_cap parameter. Check HW configuration.\n",
673 val);
674 switch (hsotg->hw_params.op_mode) {
675 case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
676 val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
677 break;
678 case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
679 case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
680 case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
681 val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
682 break;
683 default:
684 val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
685 break;
686 }
687 dev_dbg(hsotg->dev, "Setting otg_cap to %d\n", val);
688 }
689
690 hsotg->core_params->otg_cap = val;
691}
692
693void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val)
694{
695 int valid = 1;
696
697 if (val > 0 && hsotg->hw_params.arch == GHWCFG2_SLAVE_ONLY_ARCH)
698 valid = 0;
699 if (val < 0)
700 valid = 0;
701
702 if (!valid) {
703 if (val >= 0)
704 dev_err(hsotg->dev,
705 "%d invalid for dma_enable parameter. Check HW configuration.\n",
706 val);
707 val = hsotg->hw_params.arch != GHWCFG2_SLAVE_ONLY_ARCH;
708 dev_dbg(hsotg->dev, "Setting dma_enable to %d\n", val);
709 }
710
711 hsotg->core_params->dma_enable = val;
712}
713
714void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
715{
716 int valid = 1;
717
718 if (val > 0 && (hsotg->core_params->dma_enable <= 0 ||
719 !hsotg->hw_params.dma_desc_enable))
720 valid = 0;
721 if (val < 0)
722 valid = 0;
723
724 if (!valid) {
725 if (val >= 0)
726 dev_err(hsotg->dev,
727 "%d invalid for dma_desc_enable parameter. Check HW configuration.\n",
728 val);
729 val = (hsotg->core_params->dma_enable > 0 &&
730 hsotg->hw_params.dma_desc_enable);
731 dev_dbg(hsotg->dev, "Setting dma_desc_enable to %d\n", val);
732 }
733
734 hsotg->core_params->dma_desc_enable = val;
735}
736
737void dwc2_set_param_dma_desc_fs_enable(struct dwc2_hsotg *hsotg, int val)
738{
739 int valid = 1;
740
741 if (val > 0 && (hsotg->core_params->dma_enable <= 0 ||
742 !hsotg->hw_params.dma_desc_enable))
743 valid = 0;
744 if (val < 0)
745 valid = 0;
746
747 if (!valid) {
748 if (val >= 0)
749 dev_err(hsotg->dev,
750 "%d invalid for dma_desc_fs_enable parameter. Check HW configuration.\n",
751 val);
752 val = (hsotg->core_params->dma_enable > 0 &&
753 hsotg->hw_params.dma_desc_enable);
754 }
755
756 hsotg->core_params->dma_desc_fs_enable = val;
757 dev_dbg(hsotg->dev, "Setting dma_desc_fs_enable to %d\n", val);
758}
759
760void dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
761 int val)
762{
763 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
764 if (val >= 0) {
765 dev_err(hsotg->dev,
766 "Wrong value for host_support_fs_low_power\n");
767 dev_err(hsotg->dev,
768 "host_support_fs_low_power must be 0 or 1\n");
769 }
770 val = 0;
771 dev_dbg(hsotg->dev,
772 "Setting host_support_fs_low_power to %d\n", val);
773 }
774
775 hsotg->core_params->host_support_fs_ls_low_power = val;
776}
777
778void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg, int val)
779{
780 int valid = 1;
781
782 if (val > 0 && !hsotg->hw_params.enable_dynamic_fifo)
783 valid = 0;
784 if (val < 0)
785 valid = 0;
786
787 if (!valid) {
788 if (val >= 0)
789 dev_err(hsotg->dev,
790 "%d invalid for enable_dynamic_fifo parameter. Check HW configuration.\n",
791 val);
792 val = hsotg->hw_params.enable_dynamic_fifo;
793 dev_dbg(hsotg->dev, "Setting enable_dynamic_fifo to %d\n", val);
794 }
795
796 hsotg->core_params->enable_dynamic_fifo = val;
797}
798
799void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
800{
801 int valid = 1;
802
803 if (val < 16 || val > hsotg->hw_params.host_rx_fifo_size)
804 valid = 0;
805
806 if (!valid) {
807 if (val >= 0)
808 dev_err(hsotg->dev,
809 "%d invalid for host_rx_fifo_size. Check HW configuration.\n",
810 val);
811 val = hsotg->hw_params.host_rx_fifo_size;
812 dev_dbg(hsotg->dev, "Setting host_rx_fifo_size to %d\n", val);
813 }
814
815 hsotg->core_params->host_rx_fifo_size = val;
816}
817
818void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
819{
820 int valid = 1;
821
822 if (val < 16 || val > hsotg->hw_params.host_nperio_tx_fifo_size)
823 valid = 0;
824
825 if (!valid) {
826 if (val >= 0)
827 dev_err(hsotg->dev,
828 "%d invalid for host_nperio_tx_fifo_size. Check HW configuration.\n",
829 val);
830 val = hsotg->hw_params.host_nperio_tx_fifo_size;
831 dev_dbg(hsotg->dev, "Setting host_nperio_tx_fifo_size to %d\n",
832 val);
833 }
834
835 hsotg->core_params->host_nperio_tx_fifo_size = val;
836}
837
838void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
839{
840 int valid = 1;
841
842 if (val < 16 || val > hsotg->hw_params.host_perio_tx_fifo_size)
843 valid = 0;
844
845 if (!valid) {
846 if (val >= 0)
847 dev_err(hsotg->dev,
848 "%d invalid for host_perio_tx_fifo_size. Check HW configuration.\n",
849 val);
850 val = hsotg->hw_params.host_perio_tx_fifo_size;
851 dev_dbg(hsotg->dev, "Setting host_perio_tx_fifo_size to %d\n",
852 val);
853 }
854
855 hsotg->core_params->host_perio_tx_fifo_size = val;
856}
857
858void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
859{
860 int valid = 1;
861
862 if (val < 2047 || val > hsotg->hw_params.max_transfer_size)
863 valid = 0;
864
865 if (!valid) {
866 if (val >= 0)
867 dev_err(hsotg->dev,
868 "%d invalid for max_transfer_size. Check HW configuration.\n",
869 val);
870 val = hsotg->hw_params.max_transfer_size;
871 dev_dbg(hsotg->dev, "Setting max_transfer_size to %d\n", val);
872 }
873
874 hsotg->core_params->max_transfer_size = val;
875}
876
877void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
878{
879 int valid = 1;
880
881 if (val < 15 || val > hsotg->hw_params.max_packet_count)
882 valid = 0;
883
884 if (!valid) {
885 if (val >= 0)
886 dev_err(hsotg->dev,
887 "%d invalid for max_packet_count. Check HW configuration.\n",
888 val);
889 val = hsotg->hw_params.max_packet_count;
890 dev_dbg(hsotg->dev, "Setting max_packet_count to %d\n", val);
891 }
892
893 hsotg->core_params->max_packet_count = val;
894}
895
896void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
897{
898 int valid = 1;
899
900 if (val < 1 || val > hsotg->hw_params.host_channels)
901 valid = 0;
902
903 if (!valid) {
904 if (val >= 0)
905 dev_err(hsotg->dev,
906 "%d invalid for host_channels. Check HW configuration.\n",
907 val);
908 val = hsotg->hw_params.host_channels;
909 dev_dbg(hsotg->dev, "Setting host_channels to %d\n", val);
910 }
911
912 hsotg->core_params->host_channels = val;
913}
914
915void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val)
916{
917 int valid = 0;
918 u32 hs_phy_type, fs_phy_type;
919
920 if (DWC2_OUT_OF_BOUNDS(val, DWC2_PHY_TYPE_PARAM_FS,
921 DWC2_PHY_TYPE_PARAM_ULPI)) {
922 if (val >= 0) {
923 dev_err(hsotg->dev, "Wrong value for phy_type\n");
924 dev_err(hsotg->dev, "phy_type must be 0, 1 or 2\n");
925 }
926
927 valid = 0;
928 }
929
930 hs_phy_type = hsotg->hw_params.hs_phy_type;
931 fs_phy_type = hsotg->hw_params.fs_phy_type;
932 if (val == DWC2_PHY_TYPE_PARAM_UTMI &&
933 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
934 hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
935 valid = 1;
936 else if (val == DWC2_PHY_TYPE_PARAM_ULPI &&
937 (hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI ||
938 hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
939 valid = 1;
940 else if (val == DWC2_PHY_TYPE_PARAM_FS &&
941 fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
942 valid = 1;
943
944 if (!valid) {
945 if (val >= 0)
946 dev_err(hsotg->dev,
947 "%d invalid for phy_type. Check HW configuration.\n",
948 val);
949 val = DWC2_PHY_TYPE_PARAM_FS;
950 if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
951 if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
952 hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
953 val = DWC2_PHY_TYPE_PARAM_UTMI;
954 else
955 val = DWC2_PHY_TYPE_PARAM_ULPI;
956 }
957 dev_dbg(hsotg->dev, "Setting phy_type to %d\n", val);
958 }
959
960 hsotg->core_params->phy_type = val;
961}
962
963static int dwc2_get_param_phy_type(struct dwc2_hsotg *hsotg)
964{
965 return hsotg->core_params->phy_type;
966}
967
968void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
969{
970 int valid = 1;
971
972 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
973 if (val >= 0) {
974 dev_err(hsotg->dev, "Wrong value for speed parameter\n");
975 dev_err(hsotg->dev, "max_speed parameter must be 0 or 1\n");
976 }
977 valid = 0;
978 }
979
980 if (val == DWC2_SPEED_PARAM_HIGH &&
981 dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
982 valid = 0;
983
984 if (!valid) {
985 if (val >= 0)
986 dev_err(hsotg->dev,
987 "%d invalid for speed parameter. Check HW configuration.\n",
988 val);
989 val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS ?
990 DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
991 dev_dbg(hsotg->dev, "Setting speed to %d\n", val);
992 }
993
994 hsotg->core_params->speed = val;
995}
996
997void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg, int val)
998{
999 int valid = 1;
1000
1001 if (DWC2_OUT_OF_BOUNDS(val, DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ,
1002 DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ)) {
1003 if (val >= 0) {
1004 dev_err(hsotg->dev,
1005 "Wrong value for host_ls_low_power_phy_clk parameter\n");
1006 dev_err(hsotg->dev,
1007 "host_ls_low_power_phy_clk must be 0 or 1\n");
1008 }
1009 valid = 0;
1010 }
1011
1012 if (val == DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ &&
1013 dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
1014 valid = 0;
1015
1016 if (!valid) {
1017 if (val >= 0)
1018 dev_err(hsotg->dev,
1019 "%d invalid for host_ls_low_power_phy_clk. Check HW configuration.\n",
1020 val);
1021 val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS
1022 ? DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ
1023 : DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ;
1024 dev_dbg(hsotg->dev, "Setting host_ls_low_power_phy_clk to %d\n",
1025 val);
1026 }
1027
1028 hsotg->core_params->host_ls_low_power_phy_clk = val;
1029}
1030
1031void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
1032{
1033 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1034 if (val >= 0) {
1035 dev_err(hsotg->dev, "Wrong value for phy_ulpi_ddr\n");
1036 dev_err(hsotg->dev, "phy_upli_ddr must be 0 or 1\n");
1037 }
1038 val = 0;
1039 dev_dbg(hsotg->dev, "Setting phy_upli_ddr to %d\n", val);
1040 }
1041
1042 hsotg->core_params->phy_ulpi_ddr = val;
1043}
1044
1045void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
1046{
1047 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1048 if (val >= 0) {
1049 dev_err(hsotg->dev,
1050 "Wrong value for phy_ulpi_ext_vbus\n");
1051 dev_err(hsotg->dev,
1052 "phy_ulpi_ext_vbus must be 0 or 1\n");
1053 }
1054 val = 0;
1055 dev_dbg(hsotg->dev, "Setting phy_ulpi_ext_vbus to %d\n", val);
1056 }
1057
1058 hsotg->core_params->phy_ulpi_ext_vbus = val;
1059}
1060
1061void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
1062{
1063 int valid = 0;
1064
1065 switch (hsotg->hw_params.utmi_phy_data_width) {
1066 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
1067 valid = (val == 8);
1068 break;
1069 case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
1070 valid = (val == 16);
1071 break;
1072 case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
1073 valid = (val == 8 || val == 16);
1074 break;
1075 }
1076
1077 if (!valid) {
1078 if (val >= 0) {
1079 dev_err(hsotg->dev,
1080 "%d invalid for phy_utmi_width. Check HW configuration.\n",
1081 val);
1082 }
1083 val = (hsotg->hw_params.utmi_phy_data_width ==
1084 GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
1085 dev_dbg(hsotg->dev, "Setting phy_utmi_width to %d\n", val);
1086 }
1087
1088 hsotg->core_params->phy_utmi_width = val;
1089}
1090
1091void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
1092{
1093 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1094 if (val >= 0) {
1095 dev_err(hsotg->dev, "Wrong value for ulpi_fs_ls\n");
1096 dev_err(hsotg->dev, "ulpi_fs_ls must be 0 or 1\n");
1097 }
1098 val = 0;
1099 dev_dbg(hsotg->dev, "Setting ulpi_fs_ls to %d\n", val);
1100 }
1101
1102 hsotg->core_params->ulpi_fs_ls = val;
1103}
1104
1105void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
1106{
1107 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1108 if (val >= 0) {
1109 dev_err(hsotg->dev, "Wrong value for ts_dline\n");
1110 dev_err(hsotg->dev, "ts_dline must be 0 or 1\n");
1111 }
1112 val = 0;
1113 dev_dbg(hsotg->dev, "Setting ts_dline to %d\n", val);
1114 }
1115
1116 hsotg->core_params->ts_dline = val;
1117}
1118
1119void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
1120{
1121 int valid = 1;
1122
1123 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1124 if (val >= 0) {
1125 dev_err(hsotg->dev, "Wrong value for i2c_enable\n");
1126 dev_err(hsotg->dev, "i2c_enable must be 0 or 1\n");
1127 }
1128
1129 valid = 0;
1130 }
1131
1132 if (val == 1 && !(hsotg->hw_params.i2c_enable))
1133 valid = 0;
1134
1135 if (!valid) {
1136 if (val >= 0)
1137 dev_err(hsotg->dev,
1138 "%d invalid for i2c_enable. Check HW configuration.\n",
1139 val);
1140 val = hsotg->hw_params.i2c_enable;
1141 dev_dbg(hsotg->dev, "Setting i2c_enable to %d\n", val);
1142 }
1143
1144 hsotg->core_params->i2c_enable = val;
1145}
1146
1147void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg, int val)
1148{
1149 int valid = 1;
1150
1151 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1152 if (val >= 0) {
1153 dev_err(hsotg->dev,
1154 "Wrong value for en_multiple_tx_fifo,\n");
1155 dev_err(hsotg->dev,
1156 "en_multiple_tx_fifo must be 0 or 1\n");
1157 }
1158 valid = 0;
1159 }
1160
1161 if (val == 1 && !hsotg->hw_params.en_multiple_tx_fifo)
1162 valid = 0;
1163
1164 if (!valid) {
1165 if (val >= 0)
1166 dev_err(hsotg->dev,
1167 "%d invalid for parameter en_multiple_tx_fifo. Check HW configuration.\n",
1168 val);
1169 val = hsotg->hw_params.en_multiple_tx_fifo;
1170 dev_dbg(hsotg->dev, "Setting en_multiple_tx_fifo to %d\n", val);
1171 }
1172
1173 hsotg->core_params->en_multiple_tx_fifo = val;
1174}
1175
1176void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
1177{
1178 int valid = 1;
1179
1180 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1181 if (val >= 0) {
1182 dev_err(hsotg->dev,
1183 "'%d' invalid for parameter reload_ctl\n", val);
1184 dev_err(hsotg->dev, "reload_ctl must be 0 or 1\n");
1185 }
1186 valid = 0;
1187 }
1188
1189 if (val == 1 && hsotg->hw_params.snpsid < DWC2_CORE_REV_2_92a)
1190 valid = 0;
1191
1192 if (!valid) {
1193 if (val >= 0)
1194 dev_err(hsotg->dev,
1195 "%d invalid for parameter reload_ctl. Check HW configuration.\n",
1196 val);
1197 val = hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_92a;
1198 dev_dbg(hsotg->dev, "Setting reload_ctl to %d\n", val);
1199 }
1200
1201 hsotg->core_params->reload_ctl = val;
1202}
1203
1204void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
1205{
1206 if (val != -1)
1207 hsotg->core_params->ahbcfg = val;
1208 else
1209 hsotg->core_params->ahbcfg = GAHBCFG_HBSTLEN_INCR4 <<
1210 GAHBCFG_HBSTLEN_SHIFT;
1211}
1212
1213void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
1214{
1215 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1216 if (val >= 0) {
1217 dev_err(hsotg->dev,
1218 "'%d' invalid for parameter otg_ver\n", val);
1219 dev_err(hsotg->dev,
1220 "otg_ver must be 0 (for OTG 1.3 support) or 1 (for OTG 2.0 support)\n");
1221 }
1222 val = 0;
1223 dev_dbg(hsotg->dev, "Setting otg_ver to %d\n", val);
1224 }
1225
1226 hsotg->core_params->otg_ver = val;
1227}
1228
1229static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val)
1230{
1231 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1232 if (val >= 0) {
1233 dev_err(hsotg->dev,
1234 "'%d' invalid for parameter uframe_sched\n",
1235 val);
1236 dev_err(hsotg->dev, "uframe_sched must be 0 or 1\n");
1237 }
1238 val = 1;
1239 dev_dbg(hsotg->dev, "Setting uframe_sched to %d\n", val);
1240 }
1241
1242 hsotg->core_params->uframe_sched = val;
1243}
1244
1245static void dwc2_set_param_external_id_pin_ctl(struct dwc2_hsotg *hsotg,
1246 int val)
1247{
1248 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1249 if (val >= 0) {
1250 dev_err(hsotg->dev,
1251 "'%d' invalid for parameter external_id_pin_ctl\n",
1252 val);
1253 dev_err(hsotg->dev, "external_id_pin_ctl must be 0 or 1\n");
1254 }
1255 val = 0;
1256 dev_dbg(hsotg->dev, "Setting external_id_pin_ctl to %d\n", val);
1257 }
1258
1259 hsotg->core_params->external_id_pin_ctl = val;
1260}
1261
1262static void dwc2_set_param_hibernation(struct dwc2_hsotg *hsotg,
1263 int val)
1264{
1265 if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
1266 if (val >= 0) {
1267 dev_err(hsotg->dev,
1268 "'%d' invalid for parameter hibernation\n",
1269 val);
1270 dev_err(hsotg->dev, "hibernation must be 0 or 1\n");
1271 }
1272 val = 0;
1273 dev_dbg(hsotg->dev, "Setting hibernation to %d\n", val);
1274 }
1275
1276 hsotg->core_params->hibernation = val;
1277}
1278
1279/*
1280 * This function is called during module intialization to pass module parameters
1281 * for the DWC_otg core.
1282 */
1283void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
1284 const struct dwc2_core_params *params)
1285{
1286 dev_dbg(hsotg->dev, "%s()\n", __func__);
1287
1288 dwc2_set_param_otg_cap(hsotg, params->otg_cap);
1289 dwc2_set_param_dma_enable(hsotg, params->dma_enable);
1290 dwc2_set_param_dma_desc_enable(hsotg, params->dma_desc_enable);
1291 dwc2_set_param_dma_desc_fs_enable(hsotg, params->dma_desc_fs_enable);
1292 dwc2_set_param_host_support_fs_ls_low_power(hsotg,
1293 params->host_support_fs_ls_low_power);
1294 dwc2_set_param_enable_dynamic_fifo(hsotg,
1295 params->enable_dynamic_fifo);
1296 dwc2_set_param_host_rx_fifo_size(hsotg,
1297 params->host_rx_fifo_size);
1298 dwc2_set_param_host_nperio_tx_fifo_size(hsotg,
1299 params->host_nperio_tx_fifo_size);
1300 dwc2_set_param_host_perio_tx_fifo_size(hsotg,
1301 params->host_perio_tx_fifo_size);
1302 dwc2_set_param_max_transfer_size(hsotg,
1303 params->max_transfer_size);
1304 dwc2_set_param_max_packet_count(hsotg,
1305 params->max_packet_count);
1306 dwc2_set_param_host_channels(hsotg, params->host_channels);
1307 dwc2_set_param_phy_type(hsotg, params->phy_type);
1308 dwc2_set_param_speed(hsotg, params->speed);
1309 dwc2_set_param_host_ls_low_power_phy_clk(hsotg,
1310 params->host_ls_low_power_phy_clk);
1311 dwc2_set_param_phy_ulpi_ddr(hsotg, params->phy_ulpi_ddr);
1312 dwc2_set_param_phy_ulpi_ext_vbus(hsotg,
1313 params->phy_ulpi_ext_vbus);
1314 dwc2_set_param_phy_utmi_width(hsotg, params->phy_utmi_width);
1315 dwc2_set_param_ulpi_fs_ls(hsotg, params->ulpi_fs_ls);
1316 dwc2_set_param_ts_dline(hsotg, params->ts_dline);
1317 dwc2_set_param_i2c_enable(hsotg, params->i2c_enable);
1318 dwc2_set_param_en_multiple_tx_fifo(hsotg,
1319 params->en_multiple_tx_fifo);
1320 dwc2_set_param_reload_ctl(hsotg, params->reload_ctl);
1321 dwc2_set_param_ahbcfg(hsotg, params->ahbcfg);
1322 dwc2_set_param_otg_ver(hsotg, params->otg_ver);
1323 dwc2_set_param_uframe_sched(hsotg, params->uframe_sched);
1324 dwc2_set_param_external_id_pin_ctl(hsotg, params->external_id_pin_ctl);
1325 dwc2_set_param_hibernation(hsotg, params->hibernation);
1326}
1327
1328/*
1329 * Forces either host or device mode if the controller is not
1330 * currently in that mode.
1331 *
1332 * Returns true if the mode was forced.
1333 */
1334static bool dwc2_force_mode_if_needed(struct dwc2_hsotg *hsotg, bool host)
1335{
1336 if (host && dwc2_is_host_mode(hsotg))
1337 return false;
1338 else if (!host && dwc2_is_device_mode(hsotg))
1339 return false;
1340
1341 return dwc2_force_mode(hsotg, host);
1342}
1343
1344/*
1345 * Gets host hardware parameters. Forces host mode if not currently in
1346 * host mode. Should be called immediately after a core soft reset in
1347 * order to get the reset values.
1348 */
1349static void dwc2_get_host_hwparams(struct dwc2_hsotg *hsotg)
1350{
1351 struct dwc2_hw_params *hw = &hsotg->hw_params;
1352 u32 gnptxfsiz;
1353 u32 hptxfsiz;
1354 bool forced;
1355
1356 if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
1357 return;
1358
1359 forced = dwc2_force_mode_if_needed(hsotg, true);
1360
1361 gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
1362 hptxfsiz = dwc2_readl(hsotg->regs + HPTXFSIZ);
1363 dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz);
1364 dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hptxfsiz);
1365
1366 if (forced)
1367 dwc2_clear_force_mode(hsotg);
1368
1369 hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
1370 FIFOSIZE_DEPTH_SHIFT;
1371 hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
1372 FIFOSIZE_DEPTH_SHIFT;
1373}
1374
1375/*
1376 * Gets device hardware parameters. Forces device mode if not
1377 * currently in device mode. Should be called immediately after a core
1378 * soft reset in order to get the reset values.
1379 */
1380static void dwc2_get_dev_hwparams(struct dwc2_hsotg *hsotg)
1381{
1382 struct dwc2_hw_params *hw = &hsotg->hw_params;
1383 bool forced;
1384 u32 gnptxfsiz;
1385
1386 if (hsotg->dr_mode == USB_DR_MODE_HOST)
1387 return;
1388
1389 forced = dwc2_force_mode_if_needed(hsotg, false);
1390
1391 gnptxfsiz = dwc2_readl(hsotg->regs + GNPTXFSIZ);
1392 dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz);
1393
1394 if (forced)
1395 dwc2_clear_force_mode(hsotg);
1396
1397 hw->dev_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
1398 FIFOSIZE_DEPTH_SHIFT;
1399}
1400
1401/**
1402 * During device initialization, read various hardware configuration
1403 * registers and interpret the contents.
1404 */
1405int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
1406{
1407 struct dwc2_hw_params *hw = &hsotg->hw_params;
1408 unsigned width;
1409 u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
1410 u32 grxfsiz;
1411
1412 /*
1413 * Attempt to ensure this device is really a DWC_otg Controller.
1414 * Read and verify the GSNPSID register contents. The value should be
1415 * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
1416 * as in "OTG version 2.xx" or "OTG version 3.xx".
1417 */
1418 hw->snpsid = dwc2_readl(hsotg->regs + GSNPSID);
1419 if ((hw->snpsid & 0xfffff000) != 0x4f542000 &&
1420 (hw->snpsid & 0xfffff000) != 0x4f543000) {
1421 dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
1422 hw->snpsid);
1423 return -ENODEV;
1424 }
1425
1426 dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
1427 hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
1428 hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
1429
1430 hwcfg1 = dwc2_readl(hsotg->regs + GHWCFG1);
1431 hwcfg2 = dwc2_readl(hsotg->regs + GHWCFG2);
1432 hwcfg3 = dwc2_readl(hsotg->regs + GHWCFG3);
1433 hwcfg4 = dwc2_readl(hsotg->regs + GHWCFG4);
1434 grxfsiz = dwc2_readl(hsotg->regs + GRXFSIZ);
1435
1436 dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hwcfg1);
1437 dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hwcfg2);
1438 dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hwcfg3);
1439 dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hwcfg4);
1440 dev_dbg(hsotg->dev, "grxfsiz=%08x\n", grxfsiz);
1441
1442 /*
1443 * Host specific hardware parameters. Reading these parameters
1444 * requires the controller to be in host mode. The mode will
1445 * be forced, if necessary, to read these values.
1446 */
1447 dwc2_get_host_hwparams(hsotg);
1448 dwc2_get_dev_hwparams(hsotg);
1449
1450 /* hwcfg1 */
1451 hw->dev_ep_dirs = hwcfg1;
1452
1453 /* hwcfg2 */
1454 hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
1455 GHWCFG2_OP_MODE_SHIFT;
1456 hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
1457 GHWCFG2_ARCHITECTURE_SHIFT;
1458 hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
1459 hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
1460 GHWCFG2_NUM_HOST_CHAN_SHIFT);
1461 hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
1462 GHWCFG2_HS_PHY_TYPE_SHIFT;
1463 hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
1464 GHWCFG2_FS_PHY_TYPE_SHIFT;
1465 hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
1466 GHWCFG2_NUM_DEV_EP_SHIFT;
1467 hw->nperio_tx_q_depth =
1468 (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
1469 GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
1470 hw->host_perio_tx_q_depth =
1471 (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
1472 GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
1473 hw->dev_token_q_depth =
1474 (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
1475 GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
1476
1477 /* hwcfg3 */
1478 width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
1479 GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
1480 hw->max_transfer_size = (1 << (width + 11)) - 1;
1481 width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
1482 GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
1483 hw->max_packet_count = (1 << (width + 4)) - 1;
1484 hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
1485 hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
1486 GHWCFG3_DFIFO_DEPTH_SHIFT;
1487
1488 /* hwcfg4 */
1489 hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
1490 hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
1491 GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
1492 hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
1493 hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
1494 hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
1495 GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
1496
1497 /* fifo sizes */
1498 hw->host_rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
1499 GRXFSIZ_DEPTH_SHIFT;
1500
1501 dev_dbg(hsotg->dev, "Detected values from hardware:\n");
1502 dev_dbg(hsotg->dev, " op_mode=%d\n",
1503 hw->op_mode);
1504 dev_dbg(hsotg->dev, " arch=%d\n",
1505 hw->arch);
1506 dev_dbg(hsotg->dev, " dma_desc_enable=%d\n",
1507 hw->dma_desc_enable);
1508 dev_dbg(hsotg->dev, " power_optimized=%d\n",
1509 hw->power_optimized);
1510 dev_dbg(hsotg->dev, " i2c_enable=%d\n",
1511 hw->i2c_enable);
1512 dev_dbg(hsotg->dev, " hs_phy_type=%d\n",
1513 hw->hs_phy_type);
1514 dev_dbg(hsotg->dev, " fs_phy_type=%d\n",
1515 hw->fs_phy_type);
1516 dev_dbg(hsotg->dev, " utmi_phy_data_width=%d\n",
1517 hw->utmi_phy_data_width);
1518 dev_dbg(hsotg->dev, " num_dev_ep=%d\n",
1519 hw->num_dev_ep);
1520 dev_dbg(hsotg->dev, " num_dev_perio_in_ep=%d\n",
1521 hw->num_dev_perio_in_ep);
1522 dev_dbg(hsotg->dev, " host_channels=%d\n",
1523 hw->host_channels);
1524 dev_dbg(hsotg->dev, " max_transfer_size=%d\n",
1525 hw->max_transfer_size);
1526 dev_dbg(hsotg->dev, " max_packet_count=%d\n",
1527 hw->max_packet_count);
1528 dev_dbg(hsotg->dev, " nperio_tx_q_depth=0x%0x\n",
1529 hw->nperio_tx_q_depth);
1530 dev_dbg(hsotg->dev, " host_perio_tx_q_depth=0x%0x\n",
1531 hw->host_perio_tx_q_depth);
1532 dev_dbg(hsotg->dev, " dev_token_q_depth=0x%0x\n",
1533 hw->dev_token_q_depth);
1534 dev_dbg(hsotg->dev, " enable_dynamic_fifo=%d\n",
1535 hw->enable_dynamic_fifo);
1536 dev_dbg(hsotg->dev, " en_multiple_tx_fifo=%d\n",
1537 hw->en_multiple_tx_fifo);
1538 dev_dbg(hsotg->dev, " total_fifo_size=%d\n",
1539 hw->total_fifo_size);
1540 dev_dbg(hsotg->dev, " host_rx_fifo_size=%d\n",
1541 hw->host_rx_fifo_size);
1542 dev_dbg(hsotg->dev, " host_nperio_tx_fifo_size=%d\n",
1543 hw->host_nperio_tx_fifo_size);
1544 dev_dbg(hsotg->dev, " host_perio_tx_fifo_size=%d\n",
1545 hw->host_perio_tx_fifo_size);
1546 dev_dbg(hsotg->dev, "\n");
1547
1548 return 0;
1549}
1550
1551/*
1552 * Sets all parameters to the given value.
1553 *
1554 * Assumes that the dwc2_core_params struct contains only integers.
1555 */
1556void dwc2_set_all_params(struct dwc2_core_params *params, int value)
1557{
1558 int *p = (int *)params;
1559 size_t size = sizeof(*params) / sizeof(*p);
1560 int i;
1561
1562 for (i = 0; i < size; i++)
1563 p[i] = value;
1564}
1565
1566
1567u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg)
1568{
1569 return hsotg->core_params->otg_ver == 1 ? 0x0200 : 0x0103;
1570}
1571
1572bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg)
1573{
1574 if (dwc2_readl(hsotg->regs + GSNPSID) == 0xffffffff)
1575 return false;
1576 else
1577 return true;
1578}
1579
1580/**
1581 * dwc2_enable_global_interrupts() - Enables the controller's Global
1582 * Interrupt in the AHB Config register
1583 *
1584 * @hsotg: Programming view of DWC_otg controller
1585 */
1586void dwc2_enable_global_interrupts(struct dwc2_hsotg *hsotg)
1587{
1588 u32 ahbcfg = dwc2_readl(hsotg->regs + GAHBCFG);
1589
1590 ahbcfg |= GAHBCFG_GLBL_INTR_EN;
1591 dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG);
1592}
1593
1594/**
1595 * dwc2_disable_global_interrupts() - Disables the controller's Global
1596 * Interrupt in the AHB Config register
1597 *
1598 * @hsotg: Programming view of DWC_otg controller
1599 */
1600void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg)
1601{
1602 u32 ahbcfg = dwc2_readl(hsotg->regs + GAHBCFG);
1603
1604 ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
1605 dwc2_writel(ahbcfg, hsotg->regs + GAHBCFG);
1606}
1607
1608/* Returns the controller's GHWCFG2.OTG_MODE. */
1609unsigned dwc2_op_mode(struct dwc2_hsotg *hsotg)
1610{
1611 u32 ghwcfg2 = dwc2_readl(hsotg->regs + GHWCFG2);
1612
1613 return (ghwcfg2 & GHWCFG2_OP_MODE_MASK) >>
1614 GHWCFG2_OP_MODE_SHIFT;
1615}
1616
1617/* Returns true if the controller is capable of DRD. */
1618bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg)
1619{
1620 unsigned op_mode = dwc2_op_mode(hsotg);
1621
1622 return (op_mode == GHWCFG2_OP_MODE_HNP_SRP_CAPABLE) ||
1623 (op_mode == GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE) ||
1624 (op_mode == GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE);
1625}
1626
1627/* Returns true if the controller is host-only. */
1628bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg)
1629{
1630 unsigned op_mode = dwc2_op_mode(hsotg);
1631
1632 return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_HOST) ||
1633 (op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST);
1634}
1635
1636/* Returns true if the controller is device-only. */
1637bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg)
1638{
1639 unsigned op_mode = dwc2_op_mode(hsotg);
1640
1641 return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) ||
1642 (op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE);
1643}
1644
1645MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
1646MODULE_AUTHOR("Synopsys, Inc.");
1647MODULE_LICENSE("Dual BSD/GPL");
1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2/*
3 * core.c - DesignWare HS OTG Controller common routines
4 *
5 * Copyright (C) 2004-2013 Synopsys, Inc.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The names of the above-listed copyright holders may not be used
17 * to endorse or promote products derived from this software without
18 * specific prior written permission.
19 *
20 * ALTERNATIVELY, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") as published by the Free Software
22 * Foundation; either version 2 of the License, or (at your option) any
23 * later version.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * The Core code provides basic services for accessing and managing the
40 * DWC_otg hardware. These services are used by both the Host Controller
41 * Driver and the Peripheral Controller Driver.
42 */
43#include <linux/kernel.h>
44#include <linux/module.h>
45#include <linux/moduleparam.h>
46#include <linux/spinlock.h>
47#include <linux/interrupt.h>
48#include <linux/dma-mapping.h>
49#include <linux/delay.h>
50#include <linux/io.h>
51#include <linux/slab.h>
52#include <linux/usb.h>
53
54#include <linux/usb/hcd.h>
55#include <linux/usb/ch11.h>
56
57#include "core.h"
58#include "hcd.h"
59
60/**
61 * dwc2_backup_global_registers() - Backup global controller registers.
62 * When suspending usb bus, registers needs to be backuped
63 * if controller power is disabled once suspended.
64 *
65 * @hsotg: Programming view of the DWC_otg controller
66 */
67int dwc2_backup_global_registers(struct dwc2_hsotg *hsotg)
68{
69 struct dwc2_gregs_backup *gr;
70
71 dev_dbg(hsotg->dev, "%s\n", __func__);
72
73 /* Backup global regs */
74 gr = &hsotg->gr_backup;
75
76 gr->gotgctl = dwc2_readl(hsotg, GOTGCTL);
77 gr->gintmsk = dwc2_readl(hsotg, GINTMSK);
78 gr->gahbcfg = dwc2_readl(hsotg, GAHBCFG);
79 gr->gusbcfg = dwc2_readl(hsotg, GUSBCFG);
80 gr->grxfsiz = dwc2_readl(hsotg, GRXFSIZ);
81 gr->gnptxfsiz = dwc2_readl(hsotg, GNPTXFSIZ);
82 gr->gdfifocfg = dwc2_readl(hsotg, GDFIFOCFG);
83 gr->pcgcctl1 = dwc2_readl(hsotg, PCGCCTL1);
84 gr->glpmcfg = dwc2_readl(hsotg, GLPMCFG);
85 gr->gi2cctl = dwc2_readl(hsotg, GI2CCTL);
86 gr->pcgcctl = dwc2_readl(hsotg, PCGCTL);
87
88 gr->valid = true;
89 return 0;
90}
91
92/**
93 * dwc2_restore_global_registers() - Restore controller global registers.
94 * When resuming usb bus, device registers needs to be restored
95 * if controller power were disabled.
96 *
97 * @hsotg: Programming view of the DWC_otg controller
98 */
99int dwc2_restore_global_registers(struct dwc2_hsotg *hsotg)
100{
101 struct dwc2_gregs_backup *gr;
102
103 dev_dbg(hsotg->dev, "%s\n", __func__);
104
105 /* Restore global regs */
106 gr = &hsotg->gr_backup;
107 if (!gr->valid) {
108 dev_err(hsotg->dev, "%s: no global registers to restore\n",
109 __func__);
110 return -EINVAL;
111 }
112 gr->valid = false;
113
114 dwc2_writel(hsotg, 0xffffffff, GINTSTS);
115 dwc2_writel(hsotg, gr->gotgctl, GOTGCTL);
116 dwc2_writel(hsotg, gr->gintmsk, GINTMSK);
117 dwc2_writel(hsotg, gr->gusbcfg, GUSBCFG);
118 dwc2_writel(hsotg, gr->gahbcfg, GAHBCFG);
119 dwc2_writel(hsotg, gr->grxfsiz, GRXFSIZ);
120 dwc2_writel(hsotg, gr->gnptxfsiz, GNPTXFSIZ);
121 dwc2_writel(hsotg, gr->gdfifocfg, GDFIFOCFG);
122 dwc2_writel(hsotg, gr->pcgcctl1, PCGCCTL1);
123 dwc2_writel(hsotg, gr->glpmcfg, GLPMCFG);
124 dwc2_writel(hsotg, gr->pcgcctl, PCGCTL);
125 dwc2_writel(hsotg, gr->gi2cctl, GI2CCTL);
126
127 return 0;
128}
129
130/**
131 * dwc2_exit_partial_power_down() - Exit controller from Partial Power Down.
132 *
133 * @hsotg: Programming view of the DWC_otg controller
134 * @restore: Controller registers need to be restored
135 */
136int dwc2_exit_partial_power_down(struct dwc2_hsotg *hsotg, bool restore)
137{
138 u32 pcgcctl;
139 int ret = 0;
140
141 if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL)
142 return -ENOTSUPP;
143
144 pcgcctl = dwc2_readl(hsotg, PCGCTL);
145 pcgcctl &= ~PCGCTL_STOPPCLK;
146 dwc2_writel(hsotg, pcgcctl, PCGCTL);
147
148 pcgcctl = dwc2_readl(hsotg, PCGCTL);
149 pcgcctl &= ~PCGCTL_PWRCLMP;
150 dwc2_writel(hsotg, pcgcctl, PCGCTL);
151
152 pcgcctl = dwc2_readl(hsotg, PCGCTL);
153 pcgcctl &= ~PCGCTL_RSTPDWNMODULE;
154 dwc2_writel(hsotg, pcgcctl, PCGCTL);
155
156 udelay(100);
157 if (restore) {
158 ret = dwc2_restore_global_registers(hsotg);
159 if (ret) {
160 dev_err(hsotg->dev, "%s: failed to restore registers\n",
161 __func__);
162 return ret;
163 }
164 if (dwc2_is_host_mode(hsotg)) {
165 ret = dwc2_restore_host_registers(hsotg);
166 if (ret) {
167 dev_err(hsotg->dev, "%s: failed to restore host registers\n",
168 __func__);
169 return ret;
170 }
171 } else {
172 ret = dwc2_restore_device_registers(hsotg, 0);
173 if (ret) {
174 dev_err(hsotg->dev, "%s: failed to restore device registers\n",
175 __func__);
176 return ret;
177 }
178 }
179 }
180
181 return ret;
182}
183
184/**
185 * dwc2_enter_partial_power_down() - Put controller in Partial Power Down.
186 *
187 * @hsotg: Programming view of the DWC_otg controller
188 */
189int dwc2_enter_partial_power_down(struct dwc2_hsotg *hsotg)
190{
191 u32 pcgcctl;
192 int ret = 0;
193
194 if (!hsotg->params.power_down)
195 return -ENOTSUPP;
196
197 /* Backup all registers */
198 ret = dwc2_backup_global_registers(hsotg);
199 if (ret) {
200 dev_err(hsotg->dev, "%s: failed to backup global registers\n",
201 __func__);
202 return ret;
203 }
204
205 if (dwc2_is_host_mode(hsotg)) {
206 ret = dwc2_backup_host_registers(hsotg);
207 if (ret) {
208 dev_err(hsotg->dev, "%s: failed to backup host registers\n",
209 __func__);
210 return ret;
211 }
212 } else {
213 ret = dwc2_backup_device_registers(hsotg);
214 if (ret) {
215 dev_err(hsotg->dev, "%s: failed to backup device registers\n",
216 __func__);
217 return ret;
218 }
219 }
220
221 /*
222 * Clear any pending interrupts since dwc2 will not be able to
223 * clear them after entering partial_power_down.
224 */
225 dwc2_writel(hsotg, 0xffffffff, GINTSTS);
226
227 /* Put the controller in low power state */
228 pcgcctl = dwc2_readl(hsotg, PCGCTL);
229
230 pcgcctl |= PCGCTL_PWRCLMP;
231 dwc2_writel(hsotg, pcgcctl, PCGCTL);
232 ndelay(20);
233
234 pcgcctl |= PCGCTL_RSTPDWNMODULE;
235 dwc2_writel(hsotg, pcgcctl, PCGCTL);
236 ndelay(20);
237
238 pcgcctl |= PCGCTL_STOPPCLK;
239 dwc2_writel(hsotg, pcgcctl, PCGCTL);
240
241 return ret;
242}
243
244/**
245 * dwc2_restore_essential_regs() - Restore essiential regs of core.
246 *
247 * @hsotg: Programming view of the DWC_otg controller
248 * @rmode: Restore mode, enabled in case of remote-wakeup.
249 * @is_host: Host or device mode.
250 */
251static void dwc2_restore_essential_regs(struct dwc2_hsotg *hsotg, int rmode,
252 int is_host)
253{
254 u32 pcgcctl;
255 struct dwc2_gregs_backup *gr;
256 struct dwc2_dregs_backup *dr;
257 struct dwc2_hregs_backup *hr;
258
259 gr = &hsotg->gr_backup;
260 dr = &hsotg->dr_backup;
261 hr = &hsotg->hr_backup;
262
263 dev_dbg(hsotg->dev, "%s: restoring essential regs\n", __func__);
264
265 /* Load restore values for [31:14] bits */
266 pcgcctl = (gr->pcgcctl & 0xffffc000);
267 /* If High Speed */
268 if (is_host) {
269 if (!(pcgcctl & PCGCTL_P2HD_PRT_SPD_MASK))
270 pcgcctl |= BIT(17);
271 } else {
272 if (!(pcgcctl & PCGCTL_P2HD_DEV_ENUM_SPD_MASK))
273 pcgcctl |= BIT(17);
274 }
275 dwc2_writel(hsotg, pcgcctl, PCGCTL);
276
277 /* Umnask global Interrupt in GAHBCFG and restore it */
278 dwc2_writel(hsotg, gr->gahbcfg | GAHBCFG_GLBL_INTR_EN, GAHBCFG);
279
280 /* Clear all pending interupts */
281 dwc2_writel(hsotg, 0xffffffff, GINTSTS);
282
283 /* Unmask restore done interrupt */
284 dwc2_writel(hsotg, GINTSTS_RESTOREDONE, GINTMSK);
285
286 /* Restore GUSBCFG and HCFG/DCFG */
287 dwc2_writel(hsotg, gr->gusbcfg, GUSBCFG);
288
289 if (is_host) {
290 dwc2_writel(hsotg, hr->hcfg, HCFG);
291 if (rmode)
292 pcgcctl |= PCGCTL_RESTOREMODE;
293 dwc2_writel(hsotg, pcgcctl, PCGCTL);
294 udelay(10);
295
296 pcgcctl |= PCGCTL_ESS_REG_RESTORED;
297 dwc2_writel(hsotg, pcgcctl, PCGCTL);
298 udelay(10);
299 } else {
300 dwc2_writel(hsotg, dr->dcfg, DCFG);
301 if (!rmode)
302 pcgcctl |= PCGCTL_RESTOREMODE | PCGCTL_RSTPDWNMODULE;
303 dwc2_writel(hsotg, pcgcctl, PCGCTL);
304 udelay(10);
305
306 pcgcctl |= PCGCTL_ESS_REG_RESTORED;
307 dwc2_writel(hsotg, pcgcctl, PCGCTL);
308 udelay(10);
309 }
310}
311
312/**
313 * dwc2_hib_restore_common() - Common part of restore routine.
314 *
315 * @hsotg: Programming view of the DWC_otg controller
316 * @rem_wakeup: Remote-wakeup, enabled in case of remote-wakeup.
317 * @is_host: Host or device mode.
318 */
319void dwc2_hib_restore_common(struct dwc2_hsotg *hsotg, int rem_wakeup,
320 int is_host)
321{
322 u32 gpwrdn;
323
324 /* Switch-on voltage to the core */
325 gpwrdn = dwc2_readl(hsotg, GPWRDN);
326 gpwrdn &= ~GPWRDN_PWRDNSWTCH;
327 dwc2_writel(hsotg, gpwrdn, GPWRDN);
328 udelay(10);
329
330 /* Reset core */
331 gpwrdn = dwc2_readl(hsotg, GPWRDN);
332 gpwrdn &= ~GPWRDN_PWRDNRSTN;
333 dwc2_writel(hsotg, gpwrdn, GPWRDN);
334 udelay(10);
335
336 /* Enable restore from PMU */
337 gpwrdn = dwc2_readl(hsotg, GPWRDN);
338 gpwrdn |= GPWRDN_RESTORE;
339 dwc2_writel(hsotg, gpwrdn, GPWRDN);
340 udelay(10);
341
342 /* Disable Power Down Clamp */
343 gpwrdn = dwc2_readl(hsotg, GPWRDN);
344 gpwrdn &= ~GPWRDN_PWRDNCLMP;
345 dwc2_writel(hsotg, gpwrdn, GPWRDN);
346 udelay(50);
347
348 if (!is_host && rem_wakeup)
349 udelay(70);
350
351 /* Deassert reset core */
352 gpwrdn = dwc2_readl(hsotg, GPWRDN);
353 gpwrdn |= GPWRDN_PWRDNRSTN;
354 dwc2_writel(hsotg, gpwrdn, GPWRDN);
355 udelay(10);
356
357 /* Disable PMU interrupt */
358 gpwrdn = dwc2_readl(hsotg, GPWRDN);
359 gpwrdn &= ~GPWRDN_PMUINTSEL;
360 dwc2_writel(hsotg, gpwrdn, GPWRDN);
361 udelay(10);
362
363 /* Set Restore Essential Regs bit in PCGCCTL register */
364 dwc2_restore_essential_regs(hsotg, rem_wakeup, is_host);
365
366 /*
367 * Wait For Restore_done Interrupt. This mechanism of polling the
368 * interrupt is introduced to avoid any possible race conditions
369 */
370 if (dwc2_hsotg_wait_bit_set(hsotg, GINTSTS, GINTSTS_RESTOREDONE,
371 20000)) {
372 dev_dbg(hsotg->dev,
373 "%s: Restore Done wan't generated here\n",
374 __func__);
375 } else {
376 dev_dbg(hsotg->dev, "restore done generated here\n");
377 }
378}
379
380/**
381 * dwc2_wait_for_mode() - Waits for the controller mode.
382 * @hsotg: Programming view of the DWC_otg controller.
383 * @host_mode: If true, waits for host mode, otherwise device mode.
384 */
385static void dwc2_wait_for_mode(struct dwc2_hsotg *hsotg,
386 bool host_mode)
387{
388 ktime_t start;
389 ktime_t end;
390 unsigned int timeout = 110;
391
392 dev_vdbg(hsotg->dev, "Waiting for %s mode\n",
393 host_mode ? "host" : "device");
394
395 start = ktime_get();
396
397 while (1) {
398 s64 ms;
399
400 if (dwc2_is_host_mode(hsotg) == host_mode) {
401 dev_vdbg(hsotg->dev, "%s mode set\n",
402 host_mode ? "Host" : "Device");
403 break;
404 }
405
406 end = ktime_get();
407 ms = ktime_to_ms(ktime_sub(end, start));
408
409 if (ms >= (s64)timeout) {
410 dev_warn(hsotg->dev, "%s: Couldn't set %s mode\n",
411 __func__, host_mode ? "host" : "device");
412 break;
413 }
414
415 usleep_range(1000, 2000);
416 }
417}
418
419/**
420 * dwc2_iddig_filter_enabled() - Returns true if the IDDIG debounce
421 * filter is enabled.
422 *
423 * @hsotg: Programming view of DWC_otg controller
424 */
425static bool dwc2_iddig_filter_enabled(struct dwc2_hsotg *hsotg)
426{
427 u32 gsnpsid;
428 u32 ghwcfg4;
429
430 if (!dwc2_hw_is_otg(hsotg))
431 return false;
432
433 /* Check if core configuration includes the IDDIG filter. */
434 ghwcfg4 = dwc2_readl(hsotg, GHWCFG4);
435 if (!(ghwcfg4 & GHWCFG4_IDDIG_FILT_EN))
436 return false;
437
438 /*
439 * Check if the IDDIG debounce filter is bypassed. Available
440 * in core version >= 3.10a.
441 */
442 gsnpsid = dwc2_readl(hsotg, GSNPSID);
443 if (gsnpsid >= DWC2_CORE_REV_3_10a) {
444 u32 gotgctl = dwc2_readl(hsotg, GOTGCTL);
445
446 if (gotgctl & GOTGCTL_DBNCE_FLTR_BYPASS)
447 return false;
448 }
449
450 return true;
451}
452
453/*
454 * dwc2_enter_hibernation() - Common function to enter hibernation.
455 *
456 * @hsotg: Programming view of the DWC_otg controller
457 * @is_host: True if core is in host mode.
458 *
459 * Return: 0 if successful, negative error code otherwise
460 */
461int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg, int is_host)
462{
463 if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_HIBERNATION)
464 return -ENOTSUPP;
465
466 if (is_host)
467 return dwc2_host_enter_hibernation(hsotg);
468 else
469 return dwc2_gadget_enter_hibernation(hsotg);
470}
471
472/*
473 * dwc2_exit_hibernation() - Common function to exit from hibernation.
474 *
475 * @hsotg: Programming view of the DWC_otg controller
476 * @rem_wakeup: Remote-wakeup, enabled in case of remote-wakeup.
477 * @reset: Enabled in case of restore with reset.
478 * @is_host: True if core is in host mode.
479 *
480 * Return: 0 if successful, negative error code otherwise
481 */
482int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
483 int reset, int is_host)
484{
485 if (is_host)
486 return dwc2_host_exit_hibernation(hsotg, rem_wakeup, reset);
487 else
488 return dwc2_gadget_exit_hibernation(hsotg, rem_wakeup, reset);
489}
490
491/*
492 * Do core a soft reset of the core. Be careful with this because it
493 * resets all the internal state machines of the core.
494 */
495int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait)
496{
497 u32 greset;
498 bool wait_for_host_mode = false;
499
500 dev_vdbg(hsotg->dev, "%s()\n", __func__);
501
502 /*
503 * If the current mode is host, either due to the force mode
504 * bit being set (which persists after core reset) or the
505 * connector id pin, a core soft reset will temporarily reset
506 * the mode to device. A delay from the IDDIG debounce filter
507 * will occur before going back to host mode.
508 *
509 * Determine whether we will go back into host mode after a
510 * reset and account for this delay after the reset.
511 */
512 if (dwc2_iddig_filter_enabled(hsotg)) {
513 u32 gotgctl = dwc2_readl(hsotg, GOTGCTL);
514 u32 gusbcfg = dwc2_readl(hsotg, GUSBCFG);
515
516 if (!(gotgctl & GOTGCTL_CONID_B) ||
517 (gusbcfg & GUSBCFG_FORCEHOSTMODE)) {
518 wait_for_host_mode = true;
519 }
520 }
521
522 /* Core Soft Reset */
523 greset = dwc2_readl(hsotg, GRSTCTL);
524 greset |= GRSTCTL_CSFTRST;
525 dwc2_writel(hsotg, greset, GRSTCTL);
526
527 if ((hsotg->hw_params.snpsid & DWC2_CORE_REV_MASK) <
528 (DWC2_CORE_REV_4_20a & DWC2_CORE_REV_MASK)) {
529 if (dwc2_hsotg_wait_bit_clear(hsotg, GRSTCTL,
530 GRSTCTL_CSFTRST, 10000)) {
531 dev_warn(hsotg->dev, "%s: HANG! Soft Reset timeout GRSTCTL_CSFTRST\n",
532 __func__);
533 return -EBUSY;
534 }
535 } else {
536 if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL,
537 GRSTCTL_CSFTRST_DONE, 10000)) {
538 dev_warn(hsotg->dev, "%s: HANG! Soft Reset timeout GRSTCTL_CSFTRST_DONE\n",
539 __func__);
540 return -EBUSY;
541 }
542 greset = dwc2_readl(hsotg, GRSTCTL);
543 greset &= ~GRSTCTL_CSFTRST;
544 greset |= GRSTCTL_CSFTRST_DONE;
545 dwc2_writel(hsotg, greset, GRSTCTL);
546 }
547
548 /* Wait for AHB master IDLE state */
549 if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 10000)) {
550 dev_warn(hsotg->dev, "%s: HANG! AHB Idle timeout GRSTCTL GRSTCTL_AHBIDLE\n",
551 __func__);
552 return -EBUSY;
553 }
554
555 if (wait_for_host_mode && !skip_wait)
556 dwc2_wait_for_mode(hsotg, true);
557
558 return 0;
559}
560
561/**
562 * dwc2_force_mode() - Force the mode of the controller.
563 *
564 * Forcing the mode is needed for two cases:
565 *
566 * 1) If the dr_mode is set to either HOST or PERIPHERAL we force the
567 * controller to stay in a particular mode regardless of ID pin
568 * changes. We do this once during probe.
569 *
570 * 2) During probe we want to read reset values of the hw
571 * configuration registers that are only available in either host or
572 * device mode. We may need to force the mode if the current mode does
573 * not allow us to access the register in the mode that we want.
574 *
575 * In either case it only makes sense to force the mode if the
576 * controller hardware is OTG capable.
577 *
578 * Checks are done in this function to determine whether doing a force
579 * would be valid or not.
580 *
581 * If a force is done, it requires a IDDIG debounce filter delay if
582 * the filter is configured and enabled. We poll the current mode of
583 * the controller to account for this delay.
584 *
585 * @hsotg: Programming view of DWC_otg controller
586 * @host: Host mode flag
587 */
588void dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host)
589{
590 u32 gusbcfg;
591 u32 set;
592 u32 clear;
593
594 dev_dbg(hsotg->dev, "Forcing mode to %s\n", host ? "host" : "device");
595
596 /*
597 * Force mode has no effect if the hardware is not OTG.
598 */
599 if (!dwc2_hw_is_otg(hsotg))
600 return;
601
602 /*
603 * If dr_mode is either peripheral or host only, there is no
604 * need to ever force the mode to the opposite mode.
605 */
606 if (WARN_ON(host && hsotg->dr_mode == USB_DR_MODE_PERIPHERAL))
607 return;
608
609 if (WARN_ON(!host && hsotg->dr_mode == USB_DR_MODE_HOST))
610 return;
611
612 gusbcfg = dwc2_readl(hsotg, GUSBCFG);
613
614 set = host ? GUSBCFG_FORCEHOSTMODE : GUSBCFG_FORCEDEVMODE;
615 clear = host ? GUSBCFG_FORCEDEVMODE : GUSBCFG_FORCEHOSTMODE;
616
617 gusbcfg &= ~clear;
618 gusbcfg |= set;
619 dwc2_writel(hsotg, gusbcfg, GUSBCFG);
620
621 dwc2_wait_for_mode(hsotg, host);
622 return;
623}
624
625/**
626 * dwc2_clear_force_mode() - Clears the force mode bits.
627 *
628 * After clearing the bits, wait up to 100 ms to account for any
629 * potential IDDIG filter delay. We can't know if we expect this delay
630 * or not because the value of the connector ID status is affected by
631 * the force mode. We only need to call this once during probe if
632 * dr_mode == OTG.
633 *
634 * @hsotg: Programming view of DWC_otg controller
635 */
636static void dwc2_clear_force_mode(struct dwc2_hsotg *hsotg)
637{
638 u32 gusbcfg;
639
640 if (!dwc2_hw_is_otg(hsotg))
641 return;
642
643 dev_dbg(hsotg->dev, "Clearing force mode bits\n");
644
645 gusbcfg = dwc2_readl(hsotg, GUSBCFG);
646 gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
647 gusbcfg &= ~GUSBCFG_FORCEDEVMODE;
648 dwc2_writel(hsotg, gusbcfg, GUSBCFG);
649
650 if (dwc2_iddig_filter_enabled(hsotg))
651 msleep(100);
652}
653
654/*
655 * Sets or clears force mode based on the dr_mode parameter.
656 */
657void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg)
658{
659 switch (hsotg->dr_mode) {
660 case USB_DR_MODE_HOST:
661 /*
662 * NOTE: This is required for some rockchip soc based
663 * platforms on their host-only dwc2.
664 */
665 if (!dwc2_hw_is_otg(hsotg))
666 msleep(50);
667
668 break;
669 case USB_DR_MODE_PERIPHERAL:
670 dwc2_force_mode(hsotg, false);
671 break;
672 case USB_DR_MODE_OTG:
673 dwc2_clear_force_mode(hsotg);
674 break;
675 default:
676 dev_warn(hsotg->dev, "%s() Invalid dr_mode=%d\n",
677 __func__, hsotg->dr_mode);
678 break;
679 }
680}
681
682/*
683 * dwc2_enable_acg - enable active clock gating feature
684 */
685void dwc2_enable_acg(struct dwc2_hsotg *hsotg)
686{
687 if (hsotg->params.acg_enable) {
688 u32 pcgcctl1 = dwc2_readl(hsotg, PCGCCTL1);
689
690 dev_dbg(hsotg->dev, "Enabling Active Clock Gating\n");
691 pcgcctl1 |= PCGCCTL1_GATEEN;
692 dwc2_writel(hsotg, pcgcctl1, PCGCCTL1);
693 }
694}
695
696/**
697 * dwc2_dump_host_registers() - Prints the host registers
698 *
699 * @hsotg: Programming view of DWC_otg controller
700 *
701 * NOTE: This function will be removed once the peripheral controller code
702 * is integrated and the driver is stable
703 */
704void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg)
705{
706#ifdef DEBUG
707 u32 __iomem *addr;
708 int i;
709
710 dev_dbg(hsotg->dev, "Host Global Registers\n");
711 addr = hsotg->regs + HCFG;
712 dev_dbg(hsotg->dev, "HCFG @0x%08lX : 0x%08X\n",
713 (unsigned long)addr, dwc2_readl(hsotg, HCFG));
714 addr = hsotg->regs + HFIR;
715 dev_dbg(hsotg->dev, "HFIR @0x%08lX : 0x%08X\n",
716 (unsigned long)addr, dwc2_readl(hsotg, HFIR));
717 addr = hsotg->regs + HFNUM;
718 dev_dbg(hsotg->dev, "HFNUM @0x%08lX : 0x%08X\n",
719 (unsigned long)addr, dwc2_readl(hsotg, HFNUM));
720 addr = hsotg->regs + HPTXSTS;
721 dev_dbg(hsotg->dev, "HPTXSTS @0x%08lX : 0x%08X\n",
722 (unsigned long)addr, dwc2_readl(hsotg, HPTXSTS));
723 addr = hsotg->regs + HAINT;
724 dev_dbg(hsotg->dev, "HAINT @0x%08lX : 0x%08X\n",
725 (unsigned long)addr, dwc2_readl(hsotg, HAINT));
726 addr = hsotg->regs + HAINTMSK;
727 dev_dbg(hsotg->dev, "HAINTMSK @0x%08lX : 0x%08X\n",
728 (unsigned long)addr, dwc2_readl(hsotg, HAINTMSK));
729 if (hsotg->params.dma_desc_enable) {
730 addr = hsotg->regs + HFLBADDR;
731 dev_dbg(hsotg->dev, "HFLBADDR @0x%08lX : 0x%08X\n",
732 (unsigned long)addr, dwc2_readl(hsotg, HFLBADDR));
733 }
734
735 addr = hsotg->regs + HPRT0;
736 dev_dbg(hsotg->dev, "HPRT0 @0x%08lX : 0x%08X\n",
737 (unsigned long)addr, dwc2_readl(hsotg, HPRT0));
738
739 for (i = 0; i < hsotg->params.host_channels; i++) {
740 dev_dbg(hsotg->dev, "Host Channel %d Specific Registers\n", i);
741 addr = hsotg->regs + HCCHAR(i);
742 dev_dbg(hsotg->dev, "HCCHAR @0x%08lX : 0x%08X\n",
743 (unsigned long)addr, dwc2_readl(hsotg, HCCHAR(i)));
744 addr = hsotg->regs + HCSPLT(i);
745 dev_dbg(hsotg->dev, "HCSPLT @0x%08lX : 0x%08X\n",
746 (unsigned long)addr, dwc2_readl(hsotg, HCSPLT(i)));
747 addr = hsotg->regs + HCINT(i);
748 dev_dbg(hsotg->dev, "HCINT @0x%08lX : 0x%08X\n",
749 (unsigned long)addr, dwc2_readl(hsotg, HCINT(i)));
750 addr = hsotg->regs + HCINTMSK(i);
751 dev_dbg(hsotg->dev, "HCINTMSK @0x%08lX : 0x%08X\n",
752 (unsigned long)addr, dwc2_readl(hsotg, HCINTMSK(i)));
753 addr = hsotg->regs + HCTSIZ(i);
754 dev_dbg(hsotg->dev, "HCTSIZ @0x%08lX : 0x%08X\n",
755 (unsigned long)addr, dwc2_readl(hsotg, HCTSIZ(i)));
756 addr = hsotg->regs + HCDMA(i);
757 dev_dbg(hsotg->dev, "HCDMA @0x%08lX : 0x%08X\n",
758 (unsigned long)addr, dwc2_readl(hsotg, HCDMA(i)));
759 if (hsotg->params.dma_desc_enable) {
760 addr = hsotg->regs + HCDMAB(i);
761 dev_dbg(hsotg->dev, "HCDMAB @0x%08lX : 0x%08X\n",
762 (unsigned long)addr, dwc2_readl(hsotg,
763 HCDMAB(i)));
764 }
765 }
766#endif
767}
768
769/**
770 * dwc2_dump_global_registers() - Prints the core global registers
771 *
772 * @hsotg: Programming view of DWC_otg controller
773 *
774 * NOTE: This function will be removed once the peripheral controller code
775 * is integrated and the driver is stable
776 */
777void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg)
778{
779#ifdef DEBUG
780 u32 __iomem *addr;
781
782 dev_dbg(hsotg->dev, "Core Global Registers\n");
783 addr = hsotg->regs + GOTGCTL;
784 dev_dbg(hsotg->dev, "GOTGCTL @0x%08lX : 0x%08X\n",
785 (unsigned long)addr, dwc2_readl(hsotg, GOTGCTL));
786 addr = hsotg->regs + GOTGINT;
787 dev_dbg(hsotg->dev, "GOTGINT @0x%08lX : 0x%08X\n",
788 (unsigned long)addr, dwc2_readl(hsotg, GOTGINT));
789 addr = hsotg->regs + GAHBCFG;
790 dev_dbg(hsotg->dev, "GAHBCFG @0x%08lX : 0x%08X\n",
791 (unsigned long)addr, dwc2_readl(hsotg, GAHBCFG));
792 addr = hsotg->regs + GUSBCFG;
793 dev_dbg(hsotg->dev, "GUSBCFG @0x%08lX : 0x%08X\n",
794 (unsigned long)addr, dwc2_readl(hsotg, GUSBCFG));
795 addr = hsotg->regs + GRSTCTL;
796 dev_dbg(hsotg->dev, "GRSTCTL @0x%08lX : 0x%08X\n",
797 (unsigned long)addr, dwc2_readl(hsotg, GRSTCTL));
798 addr = hsotg->regs + GINTSTS;
799 dev_dbg(hsotg->dev, "GINTSTS @0x%08lX : 0x%08X\n",
800 (unsigned long)addr, dwc2_readl(hsotg, GINTSTS));
801 addr = hsotg->regs + GINTMSK;
802 dev_dbg(hsotg->dev, "GINTMSK @0x%08lX : 0x%08X\n",
803 (unsigned long)addr, dwc2_readl(hsotg, GINTMSK));
804 addr = hsotg->regs + GRXSTSR;
805 dev_dbg(hsotg->dev, "GRXSTSR @0x%08lX : 0x%08X\n",
806 (unsigned long)addr, dwc2_readl(hsotg, GRXSTSR));
807 addr = hsotg->regs + GRXFSIZ;
808 dev_dbg(hsotg->dev, "GRXFSIZ @0x%08lX : 0x%08X\n",
809 (unsigned long)addr, dwc2_readl(hsotg, GRXFSIZ));
810 addr = hsotg->regs + GNPTXFSIZ;
811 dev_dbg(hsotg->dev, "GNPTXFSIZ @0x%08lX : 0x%08X\n",
812 (unsigned long)addr, dwc2_readl(hsotg, GNPTXFSIZ));
813 addr = hsotg->regs + GNPTXSTS;
814 dev_dbg(hsotg->dev, "GNPTXSTS @0x%08lX : 0x%08X\n",
815 (unsigned long)addr, dwc2_readl(hsotg, GNPTXSTS));
816 addr = hsotg->regs + GI2CCTL;
817 dev_dbg(hsotg->dev, "GI2CCTL @0x%08lX : 0x%08X\n",
818 (unsigned long)addr, dwc2_readl(hsotg, GI2CCTL));
819 addr = hsotg->regs + GPVNDCTL;
820 dev_dbg(hsotg->dev, "GPVNDCTL @0x%08lX : 0x%08X\n",
821 (unsigned long)addr, dwc2_readl(hsotg, GPVNDCTL));
822 addr = hsotg->regs + GGPIO;
823 dev_dbg(hsotg->dev, "GGPIO @0x%08lX : 0x%08X\n",
824 (unsigned long)addr, dwc2_readl(hsotg, GGPIO));
825 addr = hsotg->regs + GUID;
826 dev_dbg(hsotg->dev, "GUID @0x%08lX : 0x%08X\n",
827 (unsigned long)addr, dwc2_readl(hsotg, GUID));
828 addr = hsotg->regs + GSNPSID;
829 dev_dbg(hsotg->dev, "GSNPSID @0x%08lX : 0x%08X\n",
830 (unsigned long)addr, dwc2_readl(hsotg, GSNPSID));
831 addr = hsotg->regs + GHWCFG1;
832 dev_dbg(hsotg->dev, "GHWCFG1 @0x%08lX : 0x%08X\n",
833 (unsigned long)addr, dwc2_readl(hsotg, GHWCFG1));
834 addr = hsotg->regs + GHWCFG2;
835 dev_dbg(hsotg->dev, "GHWCFG2 @0x%08lX : 0x%08X\n",
836 (unsigned long)addr, dwc2_readl(hsotg, GHWCFG2));
837 addr = hsotg->regs + GHWCFG3;
838 dev_dbg(hsotg->dev, "GHWCFG3 @0x%08lX : 0x%08X\n",
839 (unsigned long)addr, dwc2_readl(hsotg, GHWCFG3));
840 addr = hsotg->regs + GHWCFG4;
841 dev_dbg(hsotg->dev, "GHWCFG4 @0x%08lX : 0x%08X\n",
842 (unsigned long)addr, dwc2_readl(hsotg, GHWCFG4));
843 addr = hsotg->regs + GLPMCFG;
844 dev_dbg(hsotg->dev, "GLPMCFG @0x%08lX : 0x%08X\n",
845 (unsigned long)addr, dwc2_readl(hsotg, GLPMCFG));
846 addr = hsotg->regs + GPWRDN;
847 dev_dbg(hsotg->dev, "GPWRDN @0x%08lX : 0x%08X\n",
848 (unsigned long)addr, dwc2_readl(hsotg, GPWRDN));
849 addr = hsotg->regs + GDFIFOCFG;
850 dev_dbg(hsotg->dev, "GDFIFOCFG @0x%08lX : 0x%08X\n",
851 (unsigned long)addr, dwc2_readl(hsotg, GDFIFOCFG));
852 addr = hsotg->regs + HPTXFSIZ;
853 dev_dbg(hsotg->dev, "HPTXFSIZ @0x%08lX : 0x%08X\n",
854 (unsigned long)addr, dwc2_readl(hsotg, HPTXFSIZ));
855
856 addr = hsotg->regs + PCGCTL;
857 dev_dbg(hsotg->dev, "PCGCTL @0x%08lX : 0x%08X\n",
858 (unsigned long)addr, dwc2_readl(hsotg, PCGCTL));
859#endif
860}
861
862/**
863 * dwc2_flush_tx_fifo() - Flushes a Tx FIFO
864 *
865 * @hsotg: Programming view of DWC_otg controller
866 * @num: Tx FIFO to flush
867 */
868void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
869{
870 u32 greset;
871
872 dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num);
873
874 /* Wait for AHB master IDLE state */
875 if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 10000))
876 dev_warn(hsotg->dev, "%s: HANG! AHB Idle GRSCTL\n",
877 __func__);
878
879 greset = GRSTCTL_TXFFLSH;
880 greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK;
881 dwc2_writel(hsotg, greset, GRSTCTL);
882
883 if (dwc2_hsotg_wait_bit_clear(hsotg, GRSTCTL, GRSTCTL_TXFFLSH, 10000))
884 dev_warn(hsotg->dev, "%s: HANG! timeout GRSTCTL GRSTCTL_TXFFLSH\n",
885 __func__);
886
887 /* Wait for at least 3 PHY Clocks */
888 udelay(1);
889}
890
891/**
892 * dwc2_flush_rx_fifo() - Flushes the Rx FIFO
893 *
894 * @hsotg: Programming view of DWC_otg controller
895 */
896void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg)
897{
898 u32 greset;
899
900 dev_vdbg(hsotg->dev, "%s()\n", __func__);
901
902 /* Wait for AHB master IDLE state */
903 if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 10000))
904 dev_warn(hsotg->dev, "%s: HANG! AHB Idle GRSCTL\n",
905 __func__);
906
907 greset = GRSTCTL_RXFFLSH;
908 dwc2_writel(hsotg, greset, GRSTCTL);
909
910 /* Wait for RxFIFO flush done */
911 if (dwc2_hsotg_wait_bit_clear(hsotg, GRSTCTL, GRSTCTL_RXFFLSH, 10000))
912 dev_warn(hsotg->dev, "%s: HANG! timeout GRSTCTL GRSTCTL_RXFFLSH\n",
913 __func__);
914
915 /* Wait for at least 3 PHY Clocks */
916 udelay(1);
917}
918
919bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg)
920{
921 if (dwc2_readl(hsotg, GSNPSID) == 0xffffffff)
922 return false;
923 else
924 return true;
925}
926
927/**
928 * dwc2_enable_global_interrupts() - Enables the controller's Global
929 * Interrupt in the AHB Config register
930 *
931 * @hsotg: Programming view of DWC_otg controller
932 */
933void dwc2_enable_global_interrupts(struct dwc2_hsotg *hsotg)
934{
935 u32 ahbcfg = dwc2_readl(hsotg, GAHBCFG);
936
937 ahbcfg |= GAHBCFG_GLBL_INTR_EN;
938 dwc2_writel(hsotg, ahbcfg, GAHBCFG);
939}
940
941/**
942 * dwc2_disable_global_interrupts() - Disables the controller's Global
943 * Interrupt in the AHB Config register
944 *
945 * @hsotg: Programming view of DWC_otg controller
946 */
947void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg)
948{
949 u32 ahbcfg = dwc2_readl(hsotg, GAHBCFG);
950
951 ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
952 dwc2_writel(hsotg, ahbcfg, GAHBCFG);
953}
954
955/* Returns the controller's GHWCFG2.OTG_MODE. */
956unsigned int dwc2_op_mode(struct dwc2_hsotg *hsotg)
957{
958 u32 ghwcfg2 = dwc2_readl(hsotg, GHWCFG2);
959
960 return (ghwcfg2 & GHWCFG2_OP_MODE_MASK) >>
961 GHWCFG2_OP_MODE_SHIFT;
962}
963
964/* Returns true if the controller is capable of DRD. */
965bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg)
966{
967 unsigned int op_mode = dwc2_op_mode(hsotg);
968
969 return (op_mode == GHWCFG2_OP_MODE_HNP_SRP_CAPABLE) ||
970 (op_mode == GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE) ||
971 (op_mode == GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE);
972}
973
974/* Returns true if the controller is host-only. */
975bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg)
976{
977 unsigned int op_mode = dwc2_op_mode(hsotg);
978
979 return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_HOST) ||
980 (op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST);
981}
982
983/* Returns true if the controller is device-only. */
984bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg)
985{
986 unsigned int op_mode = dwc2_op_mode(hsotg);
987
988 return (op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE) ||
989 (op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE);
990}
991
992/**
993 * dwc2_hsotg_wait_bit_set - Waits for bit to be set.
994 * @hsotg: Programming view of DWC_otg controller.
995 * @offset: Register's offset where bit/bits must be set.
996 * @mask: Mask of the bit/bits which must be set.
997 * @timeout: Timeout to wait.
998 *
999 * Return: 0 if bit/bits are set or -ETIMEDOUT in case of timeout.
1000 */
1001int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hsotg, u32 offset, u32 mask,
1002 u32 timeout)
1003{
1004 u32 i;
1005
1006 for (i = 0; i < timeout; i++) {
1007 if (dwc2_readl(hsotg, offset) & mask)
1008 return 0;
1009 udelay(1);
1010 }
1011
1012 return -ETIMEDOUT;
1013}
1014
1015/**
1016 * dwc2_hsotg_wait_bit_clear - Waits for bit to be clear.
1017 * @hsotg: Programming view of DWC_otg controller.
1018 * @offset: Register's offset where bit/bits must be set.
1019 * @mask: Mask of the bit/bits which must be set.
1020 * @timeout: Timeout to wait.
1021 *
1022 * Return: 0 if bit/bits are set or -ETIMEDOUT in case of timeout.
1023 */
1024int dwc2_hsotg_wait_bit_clear(struct dwc2_hsotg *hsotg, u32 offset, u32 mask,
1025 u32 timeout)
1026{
1027 u32 i;
1028
1029 for (i = 0; i < timeout; i++) {
1030 if (!(dwc2_readl(hsotg, offset) & mask))
1031 return 0;
1032 udelay(1);
1033 }
1034
1035 return -ETIMEDOUT;
1036}
1037
1038/*
1039 * Initializes the FSLSPClkSel field of the HCFG register depending on the
1040 * PHY type
1041 */
1042void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
1043{
1044 u32 hcfg, val;
1045
1046 if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
1047 hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
1048 hsotg->params.ulpi_fs_ls) ||
1049 hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
1050 /* Full speed PHY */
1051 val = HCFG_FSLSPCLKSEL_48_MHZ;
1052 } else {
1053 /* High speed PHY running at full speed or high speed */
1054 val = HCFG_FSLSPCLKSEL_30_60_MHZ;
1055 }
1056
1057 dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
1058 hcfg = dwc2_readl(hsotg, HCFG);
1059 hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
1060 hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
1061 dwc2_writel(hsotg, hcfg, HCFG);
1062}
1063
1064static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
1065{
1066 u32 usbcfg, ggpio, i2cctl;
1067 int retval = 0;
1068
1069 /*
1070 * core_init() is now called on every switch so only call the
1071 * following for the first time through
1072 */
1073 if (select_phy) {
1074 dev_dbg(hsotg->dev, "FS PHY selected\n");
1075
1076 usbcfg = dwc2_readl(hsotg, GUSBCFG);
1077 if (!(usbcfg & GUSBCFG_PHYSEL)) {
1078 usbcfg |= GUSBCFG_PHYSEL;
1079 dwc2_writel(hsotg, usbcfg, GUSBCFG);
1080
1081 /* Reset after a PHY select */
1082 retval = dwc2_core_reset(hsotg, false);
1083
1084 if (retval) {
1085 dev_err(hsotg->dev,
1086 "%s: Reset failed, aborting", __func__);
1087 return retval;
1088 }
1089 }
1090
1091 if (hsotg->params.activate_stm_fs_transceiver) {
1092 ggpio = dwc2_readl(hsotg, GGPIO);
1093 if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN)) {
1094 dev_dbg(hsotg->dev, "Activating transceiver\n");
1095 /*
1096 * STM32F4x9 uses the GGPIO register as general
1097 * core configuration register.
1098 */
1099 ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
1100 dwc2_writel(hsotg, ggpio, GGPIO);
1101 }
1102 }
1103 }
1104
1105 /*
1106 * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
1107 * do this on HNP Dev/Host mode switches (done in dev_init and
1108 * host_init).
1109 */
1110 if (dwc2_is_host_mode(hsotg))
1111 dwc2_init_fs_ls_pclk_sel(hsotg);
1112
1113 if (hsotg->params.i2c_enable) {
1114 dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
1115
1116 /* Program GUSBCFG.OtgUtmiFsSel to I2C */
1117 usbcfg = dwc2_readl(hsotg, GUSBCFG);
1118 usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
1119 dwc2_writel(hsotg, usbcfg, GUSBCFG);
1120
1121 /* Program GI2CCTL.I2CEn */
1122 i2cctl = dwc2_readl(hsotg, GI2CCTL);
1123 i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
1124 i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
1125 i2cctl &= ~GI2CCTL_I2CEN;
1126 dwc2_writel(hsotg, i2cctl, GI2CCTL);
1127 i2cctl |= GI2CCTL_I2CEN;
1128 dwc2_writel(hsotg, i2cctl, GI2CCTL);
1129 }
1130
1131 return retval;
1132}
1133
1134static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
1135{
1136 u32 usbcfg, usbcfg_old;
1137 int retval = 0;
1138
1139 if (!select_phy)
1140 return 0;
1141
1142 usbcfg = dwc2_readl(hsotg, GUSBCFG);
1143 usbcfg_old = usbcfg;
1144
1145 /*
1146 * HS PHY parameters. These parameters are preserved during soft reset
1147 * so only program the first time. Do a soft reset immediately after
1148 * setting phyif.
1149 */
1150 switch (hsotg->params.phy_type) {
1151 case DWC2_PHY_TYPE_PARAM_ULPI:
1152 /* ULPI interface */
1153 dev_dbg(hsotg->dev, "HS ULPI PHY selected\n");
1154 usbcfg |= GUSBCFG_ULPI_UTMI_SEL;
1155 usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
1156 if (hsotg->params.phy_ulpi_ddr)
1157 usbcfg |= GUSBCFG_DDRSEL;
1158
1159 /* Set external VBUS indicator as needed. */
1160 if (hsotg->params.oc_disable)
1161 usbcfg |= (GUSBCFG_ULPI_INT_VBUS_IND |
1162 GUSBCFG_INDICATORPASSTHROUGH);
1163 break;
1164 case DWC2_PHY_TYPE_PARAM_UTMI:
1165 /* UTMI+ interface */
1166 dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
1167 usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
1168 if (hsotg->params.phy_utmi_width == 16)
1169 usbcfg |= GUSBCFG_PHYIF16;
1170
1171 /* Set turnaround time */
1172 if (dwc2_is_device_mode(hsotg)) {
1173 usbcfg &= ~GUSBCFG_USBTRDTIM_MASK;
1174 if (hsotg->params.phy_utmi_width == 16)
1175 usbcfg |= 5 << GUSBCFG_USBTRDTIM_SHIFT;
1176 else
1177 usbcfg |= 9 << GUSBCFG_USBTRDTIM_SHIFT;
1178 }
1179 break;
1180 default:
1181 dev_err(hsotg->dev, "FS PHY selected at HS!\n");
1182 break;
1183 }
1184
1185 if (usbcfg != usbcfg_old) {
1186 dwc2_writel(hsotg, usbcfg, GUSBCFG);
1187
1188 /* Reset after setting the PHY parameters */
1189 retval = dwc2_core_reset(hsotg, false);
1190 if (retval) {
1191 dev_err(hsotg->dev,
1192 "%s: Reset failed, aborting", __func__);
1193 return retval;
1194 }
1195 }
1196
1197 return retval;
1198}
1199
1200int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
1201{
1202 u32 usbcfg;
1203 int retval = 0;
1204
1205 if ((hsotg->params.speed == DWC2_SPEED_PARAM_FULL ||
1206 hsotg->params.speed == DWC2_SPEED_PARAM_LOW) &&
1207 hsotg->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
1208 /* If FS/LS mode with FS/LS PHY */
1209 retval = dwc2_fs_phy_init(hsotg, select_phy);
1210 if (retval)
1211 return retval;
1212 } else {
1213 /* High speed PHY */
1214 retval = dwc2_hs_phy_init(hsotg, select_phy);
1215 if (retval)
1216 return retval;
1217 }
1218
1219 if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
1220 hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
1221 hsotg->params.ulpi_fs_ls) {
1222 dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
1223 usbcfg = dwc2_readl(hsotg, GUSBCFG);
1224 usbcfg |= GUSBCFG_ULPI_FS_LS;
1225 usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
1226 dwc2_writel(hsotg, usbcfg, GUSBCFG);
1227 } else {
1228 usbcfg = dwc2_readl(hsotg, GUSBCFG);
1229 usbcfg &= ~GUSBCFG_ULPI_FS_LS;
1230 usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
1231 dwc2_writel(hsotg, usbcfg, GUSBCFG);
1232 }
1233
1234 return retval;
1235}
1236
1237MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
1238MODULE_AUTHOR("Synopsys, Inc.");
1239MODULE_LICENSE("Dual BSD/GPL");