These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / drivers / usb / musb / sunxi.c
1 /*
2  * Allwinner sun4i MUSB Glue Layer
3  *
4  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
5  *
6  * Based on code from
7  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  */
19
20 #include <linux/clk.h>
21 #include <linux/err.h>
22 #include <linux/extcon.h>
23 #include <linux/io.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/of.h>
27 #include <linux/phy/phy-sun4i-usb.h>
28 #include <linux/platform_device.h>
29 #include <linux/reset.h>
30 #include <linux/soc/sunxi/sunxi_sram.h>
31 #include <linux/usb/musb.h>
32 #include <linux/usb/of.h>
33 #include <linux/usb/usb_phy_generic.h>
34 #include <linux/workqueue.h>
35 #include "musb_core.h"
36
37 /*
38  * Register offsets, note sunxi musb has a different layout then most
39  * musb implementations, we translate the layout in musb_readb & friends.
40  */
41 #define SUNXI_MUSB_POWER                        0x0040
42 #define SUNXI_MUSB_DEVCTL                       0x0041
43 #define SUNXI_MUSB_INDEX                        0x0042
44 #define SUNXI_MUSB_VEND0                        0x0043
45 #define SUNXI_MUSB_INTRTX                       0x0044
46 #define SUNXI_MUSB_INTRRX                       0x0046
47 #define SUNXI_MUSB_INTRTXE                      0x0048
48 #define SUNXI_MUSB_INTRRXE                      0x004a
49 #define SUNXI_MUSB_INTRUSB                      0x004c
50 #define SUNXI_MUSB_INTRUSBE                     0x0050
51 #define SUNXI_MUSB_FRAME                        0x0054
52 #define SUNXI_MUSB_TXFIFOSZ                     0x0090
53 #define SUNXI_MUSB_TXFIFOADD                    0x0092
54 #define SUNXI_MUSB_RXFIFOSZ                     0x0094
55 #define SUNXI_MUSB_RXFIFOADD                    0x0096
56 #define SUNXI_MUSB_FADDR                        0x0098
57 #define SUNXI_MUSB_TXFUNCADDR                   0x0098
58 #define SUNXI_MUSB_TXHUBADDR                    0x009a
59 #define SUNXI_MUSB_TXHUBPORT                    0x009b
60 #define SUNXI_MUSB_RXFUNCADDR                   0x009c
61 #define SUNXI_MUSB_RXHUBADDR                    0x009e
62 #define SUNXI_MUSB_RXHUBPORT                    0x009f
63 #define SUNXI_MUSB_CONFIGDATA                   0x00c0
64
65 /* VEND0 bits */
66 #define SUNXI_MUSB_VEND0_PIO_MODE               0
67
68 /* flags */
69 #define SUNXI_MUSB_FL_ENABLED                   0
70 #define SUNXI_MUSB_FL_HOSTMODE                  1
71 #define SUNXI_MUSB_FL_HOSTMODE_PEND             2
72 #define SUNXI_MUSB_FL_VBUS_ON                   3
73 #define SUNXI_MUSB_FL_PHY_ON                    4
74 #define SUNXI_MUSB_FL_HAS_SRAM                  5
75 #define SUNXI_MUSB_FL_HAS_RESET                 6
76 #define SUNXI_MUSB_FL_NO_CONFIGDATA             7
77
78 /* Our read/write methods need access and do not get passed in a musb ref :| */
79 static struct musb *sunxi_musb;
80
81 struct sunxi_glue {
82         struct device           *dev;
83         struct platform_device  *musb;
84         struct clk              *clk;
85         struct reset_control    *rst;
86         struct phy              *phy;
87         struct platform_device  *usb_phy;
88         struct usb_phy          *xceiv;
89         unsigned long           flags;
90         struct work_struct      work;
91         struct extcon_dev       *extcon;
92         struct notifier_block   host_nb;
93 };
94
95 /* phy_power_on / off may sleep, so we use a workqueue  */
96 static void sunxi_musb_work(struct work_struct *work)
97 {
98         struct sunxi_glue *glue = container_of(work, struct sunxi_glue, work);
99         bool vbus_on, phy_on;
100
101         if (!test_bit(SUNXI_MUSB_FL_ENABLED, &glue->flags))
102                 return;
103
104         if (test_and_clear_bit(SUNXI_MUSB_FL_HOSTMODE_PEND, &glue->flags)) {
105                 struct musb *musb = platform_get_drvdata(glue->musb);
106                 unsigned long flags;
107                 u8 devctl;
108
109                 spin_lock_irqsave(&musb->lock, flags);
110
111                 devctl = readb(musb->mregs + SUNXI_MUSB_DEVCTL);
112                 if (test_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags)) {
113                         set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
114                         musb->xceiv->otg->default_a = 1;
115                         musb->xceiv->otg->state = OTG_STATE_A_IDLE;
116                         MUSB_HST_MODE(musb);
117                         devctl |= MUSB_DEVCTL_SESSION;
118                 } else {
119                         clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
120                         musb->xceiv->otg->default_a = 0;
121                         musb->xceiv->otg->state = OTG_STATE_B_IDLE;
122                         MUSB_DEV_MODE(musb);
123                         devctl &= ~MUSB_DEVCTL_SESSION;
124                 }
125                 writeb(devctl, musb->mregs + SUNXI_MUSB_DEVCTL);
126
127                 spin_unlock_irqrestore(&musb->lock, flags);
128         }
129
130         vbus_on = test_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
131         phy_on = test_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
132
133         if (phy_on != vbus_on) {
134                 if (vbus_on) {
135                         phy_power_on(glue->phy);
136                         set_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
137                 } else {
138                         phy_power_off(glue->phy);
139                         clear_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
140                 }
141         }
142 }
143
144 static void sunxi_musb_set_vbus(struct musb *musb, int is_on)
145 {
146         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
147
148         if (is_on)
149                 set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
150         else
151                 clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
152
153         schedule_work(&glue->work);
154 }
155
156 static void sunxi_musb_pre_root_reset_end(struct musb *musb)
157 {
158         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
159
160         sun4i_usb_phy_set_squelch_detect(glue->phy, false);
161 }
162
163 static void sunxi_musb_post_root_reset_end(struct musb *musb)
164 {
165         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
166
167         sun4i_usb_phy_set_squelch_detect(glue->phy, true);
168 }
169
170 static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci)
171 {
172         struct musb *musb = __hci;
173         unsigned long flags;
174
175         spin_lock_irqsave(&musb->lock, flags);
176
177         musb->int_usb = readb(musb->mregs + SUNXI_MUSB_INTRUSB);
178         if (musb->int_usb)
179                 writeb(musb->int_usb, musb->mregs + SUNXI_MUSB_INTRUSB);
180
181         /*
182          * sunxi musb often signals babble on low / full speed device
183          * disconnect, without ever raising MUSB_INTR_DISCONNECT, since
184          * normally babble never happens treat it as disconnect.
185          */
186         if ((musb->int_usb & MUSB_INTR_BABBLE) && is_host_active(musb)) {
187                 musb->int_usb &= ~MUSB_INTR_BABBLE;
188                 musb->int_usb |= MUSB_INTR_DISCONNECT;
189         }
190
191         if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) {
192                 /* ep0 FADDR must be 0 when (re)entering peripheral mode */
193                 musb_ep_select(musb->mregs, 0);
194                 musb_writeb(musb->mregs, MUSB_FADDR, 0);
195         }
196
197         musb->int_tx = readw(musb->mregs + SUNXI_MUSB_INTRTX);
198         if (musb->int_tx)
199                 writew(musb->int_tx, musb->mregs + SUNXI_MUSB_INTRTX);
200
201         musb->int_rx = readw(musb->mregs + SUNXI_MUSB_INTRRX);
202         if (musb->int_rx)
203                 writew(musb->int_rx, musb->mregs + SUNXI_MUSB_INTRRX);
204
205         musb_interrupt(musb);
206
207         spin_unlock_irqrestore(&musb->lock, flags);
208
209         return IRQ_HANDLED;
210 }
211
212 static int sunxi_musb_host_notifier(struct notifier_block *nb,
213                                     unsigned long event, void *ptr)
214 {
215         struct sunxi_glue *glue = container_of(nb, struct sunxi_glue, host_nb);
216
217         if (event)
218                 set_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags);
219         else
220                 clear_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags);
221
222         set_bit(SUNXI_MUSB_FL_HOSTMODE_PEND, &glue->flags);
223         schedule_work(&glue->work);
224
225         return NOTIFY_DONE;
226 }
227
228 static int sunxi_musb_init(struct musb *musb)
229 {
230         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
231         int ret;
232
233         sunxi_musb = musb;
234         musb->phy = glue->phy;
235         musb->xceiv = glue->xceiv;
236
237         if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) {
238                 ret = sunxi_sram_claim(musb->controller->parent);
239                 if (ret)
240                         return ret;
241         }
242
243         ret = clk_prepare_enable(glue->clk);
244         if (ret)
245                 goto error_sram_release;
246
247         if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) {
248                 ret = reset_control_deassert(glue->rst);
249                 if (ret)
250                         goto error_clk_disable;
251         }
252
253         writeb(SUNXI_MUSB_VEND0_PIO_MODE, musb->mregs + SUNXI_MUSB_VEND0);
254
255         /* Register notifier before calling phy_init() */
256         if (musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) {
257                 ret = extcon_register_notifier(glue->extcon, EXTCON_USB_HOST,
258                                                &glue->host_nb);
259                 if (ret)
260                         goto error_reset_assert;
261         }
262
263         ret = phy_init(glue->phy);
264         if (ret)
265                 goto error_unregister_notifier;
266
267         if (musb->port_mode == MUSB_PORT_MODE_HOST) {
268                 ret = phy_power_on(glue->phy);
269                 if (ret)
270                         goto error_phy_exit;
271                 set_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
272                 /* Stop musb work from turning vbus off again */
273                 set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
274         }
275
276         musb->isr = sunxi_musb_interrupt;
277
278         /* Stop the musb-core from doing runtime pm (not supported on sunxi) */
279         pm_runtime_get(musb->controller);
280
281         return 0;
282
283 error_phy_exit:
284         phy_exit(glue->phy);
285 error_unregister_notifier:
286         if (musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
287                 extcon_unregister_notifier(glue->extcon, EXTCON_USB_HOST,
288                                            &glue->host_nb);
289 error_reset_assert:
290         if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags))
291                 reset_control_assert(glue->rst);
292 error_clk_disable:
293         clk_disable_unprepare(glue->clk);
294 error_sram_release:
295         if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags))
296                 sunxi_sram_release(musb->controller->parent);
297         return ret;
298 }
299
300 static int sunxi_musb_exit(struct musb *musb)
301 {
302         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
303
304         pm_runtime_put(musb->controller);
305
306         cancel_work_sync(&glue->work);
307         if (test_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags))
308                 phy_power_off(glue->phy);
309
310         phy_exit(glue->phy);
311
312         if (musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
313                 extcon_unregister_notifier(glue->extcon, EXTCON_USB_HOST,
314                                            &glue->host_nb);
315
316         if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags))
317                 reset_control_assert(glue->rst);
318
319         clk_disable_unprepare(glue->clk);
320         if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags))
321                 sunxi_sram_release(musb->controller->parent);
322
323         return 0;
324 }
325
326 static void sunxi_musb_enable(struct musb *musb)
327 {
328         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
329
330         /* musb_core does not call us in a balanced manner */
331         if (test_and_set_bit(SUNXI_MUSB_FL_ENABLED, &glue->flags))
332                 return;
333
334         schedule_work(&glue->work);
335 }
336
337 static void sunxi_musb_disable(struct musb *musb)
338 {
339         struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
340
341         clear_bit(SUNXI_MUSB_FL_ENABLED, &glue->flags);
342 }
343
344 struct dma_controller *sunxi_musb_dma_controller_create(struct musb *musb,
345                                                     void __iomem *base)
346 {
347         return NULL;
348 }
349
350 void sunxi_musb_dma_controller_destroy(struct dma_controller *c)
351 {
352 }
353
354 /*
355  * sunxi musb register layout
356  * 0x00 - 0x17  fifo regs, 1 long per fifo
357  * 0x40 - 0x57  generic control regs (power - frame)
358  * 0x80 - 0x8f  ep control regs (addressed through hw_ep->regs, indexed)
359  * 0x90 - 0x97  fifo control regs (indexed)
360  * 0x98 - 0x9f  multipoint / busctl regs (indexed)
361  * 0xc0         configdata reg
362  */
363
364 static u32 sunxi_musb_fifo_offset(u8 epnum)
365 {
366         return (epnum * 4);
367 }
368
369 static u32 sunxi_musb_ep_offset(u8 epnum, u16 offset)
370 {
371         WARN_ONCE(offset != 0,
372                   "sunxi_musb_ep_offset called with non 0 offset\n");
373
374         return 0x80; /* indexed, so ignore epnum */
375 }
376
377 static u32 sunxi_musb_busctl_offset(u8 epnum, u16 offset)
378 {
379         return SUNXI_MUSB_TXFUNCADDR + offset;
380 }
381
382 static u8 sunxi_musb_readb(const void __iomem *addr, unsigned offset)
383 {
384         struct sunxi_glue *glue;
385
386         if (addr == sunxi_musb->mregs) {
387                 /* generic control or fifo control reg access */
388                 switch (offset) {
389                 case MUSB_FADDR:
390                         return readb(addr + SUNXI_MUSB_FADDR);
391                 case MUSB_POWER:
392                         return readb(addr + SUNXI_MUSB_POWER);
393                 case MUSB_INTRUSB:
394                         return readb(addr + SUNXI_MUSB_INTRUSB);
395                 case MUSB_INTRUSBE:
396                         return readb(addr + SUNXI_MUSB_INTRUSBE);
397                 case MUSB_INDEX:
398                         return readb(addr + SUNXI_MUSB_INDEX);
399                 case MUSB_TESTMODE:
400                         return 0; /* No testmode on sunxi */
401                 case MUSB_DEVCTL:
402                         return readb(addr + SUNXI_MUSB_DEVCTL);
403                 case MUSB_TXFIFOSZ:
404                         return readb(addr + SUNXI_MUSB_TXFIFOSZ);
405                 case MUSB_RXFIFOSZ:
406                         return readb(addr + SUNXI_MUSB_RXFIFOSZ);
407                 case MUSB_CONFIGDATA + 0x10: /* See musb_read_configdata() */
408                         glue = dev_get_drvdata(sunxi_musb->controller->parent);
409                         /* A33 saves a reg, and we get to hardcode this */
410                         if (test_bit(SUNXI_MUSB_FL_NO_CONFIGDATA,
411                                      &glue->flags))
412                                 return 0xde;
413
414                         return readb(addr + SUNXI_MUSB_CONFIGDATA);
415                 /* Offset for these is fixed by sunxi_musb_busctl_offset() */
416                 case SUNXI_MUSB_TXFUNCADDR:
417                 case SUNXI_MUSB_TXHUBADDR:
418                 case SUNXI_MUSB_TXHUBPORT:
419                 case SUNXI_MUSB_RXFUNCADDR:
420                 case SUNXI_MUSB_RXHUBADDR:
421                 case SUNXI_MUSB_RXHUBPORT:
422                         /* multipoint / busctl reg access */
423                         return readb(addr + offset);
424                 default:
425                         dev_err(sunxi_musb->controller->parent,
426                                 "Error unknown readb offset %u\n", offset);
427                         return 0;
428                 }
429         } else if (addr == (sunxi_musb->mregs + 0x80)) {
430                 /* ep control reg access */
431                 /* sunxi has a 2 byte hole before the txtype register */
432                 if (offset >= MUSB_TXTYPE)
433                         offset += 2;
434                 return readb(addr + offset);
435         }
436
437         dev_err(sunxi_musb->controller->parent,
438                 "Error unknown readb at 0x%x bytes offset\n",
439                 (int)(addr - sunxi_musb->mregs));
440         return 0;
441 }
442
443 static void sunxi_musb_writeb(void __iomem *addr, unsigned offset, u8 data)
444 {
445         if (addr == sunxi_musb->mregs) {
446                 /* generic control or fifo control reg access */
447                 switch (offset) {
448                 case MUSB_FADDR:
449                         return writeb(data, addr + SUNXI_MUSB_FADDR);
450                 case MUSB_POWER:
451                         return writeb(data, addr + SUNXI_MUSB_POWER);
452                 case MUSB_INTRUSB:
453                         return writeb(data, addr + SUNXI_MUSB_INTRUSB);
454                 case MUSB_INTRUSBE:
455                         return writeb(data, addr + SUNXI_MUSB_INTRUSBE);
456                 case MUSB_INDEX:
457                         return writeb(data, addr + SUNXI_MUSB_INDEX);
458                 case MUSB_TESTMODE:
459                         if (data)
460                                 dev_warn(sunxi_musb->controller->parent,
461                                         "sunxi-musb does not have testmode\n");
462                         return;
463                 case MUSB_DEVCTL:
464                         return writeb(data, addr + SUNXI_MUSB_DEVCTL);
465                 case MUSB_TXFIFOSZ:
466                         return writeb(data, addr + SUNXI_MUSB_TXFIFOSZ);
467                 case MUSB_RXFIFOSZ:
468                         return writeb(data, addr + SUNXI_MUSB_RXFIFOSZ);
469                 /* Offset for these is fixed by sunxi_musb_busctl_offset() */
470                 case SUNXI_MUSB_TXFUNCADDR:
471                 case SUNXI_MUSB_TXHUBADDR:
472                 case SUNXI_MUSB_TXHUBPORT:
473                 case SUNXI_MUSB_RXFUNCADDR:
474                 case SUNXI_MUSB_RXHUBADDR:
475                 case SUNXI_MUSB_RXHUBPORT:
476                         /* multipoint / busctl reg access */
477                         return writeb(data, addr + offset);
478                 default:
479                         dev_err(sunxi_musb->controller->parent,
480                                 "Error unknown writeb offset %u\n", offset);
481                         return;
482                 }
483         } else if (addr == (sunxi_musb->mregs + 0x80)) {
484                 /* ep control reg access */
485                 if (offset >= MUSB_TXTYPE)
486                         offset += 2;
487                 return writeb(data, addr + offset);
488         }
489
490         dev_err(sunxi_musb->controller->parent,
491                 "Error unknown writeb at 0x%x bytes offset\n",
492                 (int)(addr - sunxi_musb->mregs));
493 }
494
495 static u16 sunxi_musb_readw(const void __iomem *addr, unsigned offset)
496 {
497         if (addr == sunxi_musb->mregs) {
498                 /* generic control or fifo control reg access */
499                 switch (offset) {
500                 case MUSB_INTRTX:
501                         return readw(addr + SUNXI_MUSB_INTRTX);
502                 case MUSB_INTRRX:
503                         return readw(addr + SUNXI_MUSB_INTRRX);
504                 case MUSB_INTRTXE:
505                         return readw(addr + SUNXI_MUSB_INTRTXE);
506                 case MUSB_INTRRXE:
507                         return readw(addr + SUNXI_MUSB_INTRRXE);
508                 case MUSB_FRAME:
509                         return readw(addr + SUNXI_MUSB_FRAME);
510                 case MUSB_TXFIFOADD:
511                         return readw(addr + SUNXI_MUSB_TXFIFOADD);
512                 case MUSB_RXFIFOADD:
513                         return readw(addr + SUNXI_MUSB_RXFIFOADD);
514                 case MUSB_HWVERS:
515                         return 0; /* sunxi musb version is not known */
516                 default:
517                         dev_err(sunxi_musb->controller->parent,
518                                 "Error unknown readw offset %u\n", offset);
519                         return 0;
520                 }
521         } else if (addr == (sunxi_musb->mregs + 0x80)) {
522                 /* ep control reg access */
523                 return readw(addr + offset);
524         }
525
526         dev_err(sunxi_musb->controller->parent,
527                 "Error unknown readw at 0x%x bytes offset\n",
528                 (int)(addr - sunxi_musb->mregs));
529         return 0;
530 }
531
532 static void sunxi_musb_writew(void __iomem *addr, unsigned offset, u16 data)
533 {
534         if (addr == sunxi_musb->mregs) {
535                 /* generic control or fifo control reg access */
536                 switch (offset) {
537                 case MUSB_INTRTX:
538                         return writew(data, addr + SUNXI_MUSB_INTRTX);
539                 case MUSB_INTRRX:
540                         return writew(data, addr + SUNXI_MUSB_INTRRX);
541                 case MUSB_INTRTXE:
542                         return writew(data, addr + SUNXI_MUSB_INTRTXE);
543                 case MUSB_INTRRXE:
544                         return writew(data, addr + SUNXI_MUSB_INTRRXE);
545                 case MUSB_FRAME:
546                         return writew(data, addr + SUNXI_MUSB_FRAME);
547                 case MUSB_TXFIFOADD:
548                         return writew(data, addr + SUNXI_MUSB_TXFIFOADD);
549                 case MUSB_RXFIFOADD:
550                         return writew(data, addr + SUNXI_MUSB_RXFIFOADD);
551                 default:
552                         dev_err(sunxi_musb->controller->parent,
553                                 "Error unknown writew offset %u\n", offset);
554                         return;
555                 }
556         } else if (addr == (sunxi_musb->mregs + 0x80)) {
557                 /* ep control reg access */
558                 return writew(data, addr + offset);
559         }
560
561         dev_err(sunxi_musb->controller->parent,
562                 "Error unknown writew at 0x%x bytes offset\n",
563                 (int)(addr - sunxi_musb->mregs));
564 }
565
566 static const struct musb_platform_ops sunxi_musb_ops = {
567         .quirks         = MUSB_INDEXED_EP,
568         .init           = sunxi_musb_init,
569         .exit           = sunxi_musb_exit,
570         .enable         = sunxi_musb_enable,
571         .disable        = sunxi_musb_disable,
572         .fifo_offset    = sunxi_musb_fifo_offset,
573         .ep_offset      = sunxi_musb_ep_offset,
574         .busctl_offset  = sunxi_musb_busctl_offset,
575         .readb          = sunxi_musb_readb,
576         .writeb         = sunxi_musb_writeb,
577         .readw          = sunxi_musb_readw,
578         .writew         = sunxi_musb_writew,
579         .dma_init       = sunxi_musb_dma_controller_create,
580         .dma_exit       = sunxi_musb_dma_controller_destroy,
581         .set_vbus       = sunxi_musb_set_vbus,
582         .pre_root_reset_end = sunxi_musb_pre_root_reset_end,
583         .post_root_reset_end = sunxi_musb_post_root_reset_end,
584 };
585
586 /* Allwinner OTG supports up to 5 endpoints */
587 #define SUNXI_MUSB_MAX_EP_NUM   6
588 #define SUNXI_MUSB_RAM_BITS     11
589
590 static struct musb_fifo_cfg sunxi_musb_mode_cfg[] = {
591         MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
592         MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
593         MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
594         MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
595         MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
596         MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
597         MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
598         MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
599         MUSB_EP_FIFO_SINGLE(5, FIFO_TX, 512),
600         MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
601 };
602
603 static struct musb_hdrc_config sunxi_musb_hdrc_config = {
604         .fifo_cfg       = sunxi_musb_mode_cfg,
605         .fifo_cfg_size  = ARRAY_SIZE(sunxi_musb_mode_cfg),
606         .multipoint     = true,
607         .dyn_fifo       = true,
608         .soft_con       = true,
609         .num_eps        = SUNXI_MUSB_MAX_EP_NUM,
610         .ram_bits       = SUNXI_MUSB_RAM_BITS,
611         .dma            = 0,
612 };
613
614 static int sunxi_musb_probe(struct platform_device *pdev)
615 {
616         struct musb_hdrc_platform_data  pdata;
617         struct platform_device_info     pinfo;
618         struct sunxi_glue               *glue;
619         struct device_node              *np = pdev->dev.of_node;
620         int ret;
621
622         if (!np) {
623                 dev_err(&pdev->dev, "Error no device tree node found\n");
624                 return -EINVAL;
625         }
626
627         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
628         if (!glue)
629                 return -ENOMEM;
630
631         memset(&pdata, 0, sizeof(pdata));
632         switch (usb_get_dr_mode(&pdev->dev)) {
633 #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_HOST
634         case USB_DR_MODE_HOST:
635                 pdata.mode = MUSB_PORT_MODE_HOST;
636                 break;
637 #endif
638 #ifdef CONFIG_USB_MUSB_DUAL_ROLE
639         case USB_DR_MODE_OTG:
640                 glue->extcon = extcon_get_edev_by_phandle(&pdev->dev, 0);
641                 if (IS_ERR(glue->extcon)) {
642                         if (PTR_ERR(glue->extcon) == -EPROBE_DEFER)
643                                 return -EPROBE_DEFER;
644                         dev_err(&pdev->dev, "Invalid or missing extcon\n");
645                         return PTR_ERR(glue->extcon);
646                 }
647                 pdata.mode = MUSB_PORT_MODE_DUAL_ROLE;
648                 break;
649 #endif
650         default:
651                 dev_err(&pdev->dev, "Invalid or missing 'dr_mode' property\n");
652                 return -EINVAL;
653         }
654         pdata.platform_ops      = &sunxi_musb_ops;
655         pdata.config            = &sunxi_musb_hdrc_config;
656
657         glue->dev = &pdev->dev;
658         INIT_WORK(&glue->work, sunxi_musb_work);
659         glue->host_nb.notifier_call = sunxi_musb_host_notifier;
660
661         if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb"))
662                 set_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags);
663
664         if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb"))
665                 set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
666
667         if (of_device_is_compatible(np, "allwinner,sun8i-a33-musb")) {
668                 set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags);
669                 set_bit(SUNXI_MUSB_FL_NO_CONFIGDATA, &glue->flags);
670         }
671
672         glue->clk = devm_clk_get(&pdev->dev, NULL);
673         if (IS_ERR(glue->clk)) {
674                 dev_err(&pdev->dev, "Error getting clock: %ld\n",
675                         PTR_ERR(glue->clk));
676                 return PTR_ERR(glue->clk);
677         }
678
679         if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) {
680                 glue->rst = devm_reset_control_get(&pdev->dev, NULL);
681                 if (IS_ERR(glue->rst)) {
682                         if (PTR_ERR(glue->rst) == -EPROBE_DEFER)
683                                 return -EPROBE_DEFER;
684                         dev_err(&pdev->dev, "Error getting reset %ld\n",
685                                 PTR_ERR(glue->rst));
686                         return PTR_ERR(glue->rst);
687                 }
688         }
689
690         glue->phy = devm_phy_get(&pdev->dev, "usb");
691         if (IS_ERR(glue->phy)) {
692                 if (PTR_ERR(glue->phy) == -EPROBE_DEFER)
693                         return -EPROBE_DEFER;
694                 dev_err(&pdev->dev, "Error getting phy %ld\n",
695                         PTR_ERR(glue->phy));
696                 return PTR_ERR(glue->phy);
697         }
698
699         glue->usb_phy = usb_phy_generic_register();
700         if (IS_ERR(glue->usb_phy)) {
701                 dev_err(&pdev->dev, "Error registering usb-phy %ld\n",
702                         PTR_ERR(glue->usb_phy));
703                 return PTR_ERR(glue->usb_phy);
704         }
705
706         glue->xceiv = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
707         if (IS_ERR(glue->xceiv)) {
708                 ret = PTR_ERR(glue->xceiv);
709                 dev_err(&pdev->dev, "Error getting usb-phy %d\n", ret);
710                 goto err_unregister_usb_phy;
711         }
712
713         platform_set_drvdata(pdev, glue);
714
715         memset(&pinfo, 0, sizeof(pinfo));
716         pinfo.name       = "musb-hdrc";
717         pinfo.id        = PLATFORM_DEVID_AUTO;
718         pinfo.parent    = &pdev->dev;
719         pinfo.res       = pdev->resource;
720         pinfo.num_res   = pdev->num_resources;
721         pinfo.data      = &pdata;
722         pinfo.size_data = sizeof(pdata);
723
724         glue->musb = platform_device_register_full(&pinfo);
725         if (IS_ERR(glue->musb)) {
726                 ret = PTR_ERR(glue->musb);
727                 dev_err(&pdev->dev, "Error registering musb dev: %d\n", ret);
728                 goto err_unregister_usb_phy;
729         }
730
731         return 0;
732
733 err_unregister_usb_phy:
734         usb_phy_generic_unregister(glue->usb_phy);
735         return ret;
736 }
737
738 static int sunxi_musb_remove(struct platform_device *pdev)
739 {
740         struct sunxi_glue *glue = platform_get_drvdata(pdev);
741         struct platform_device *usb_phy = glue->usb_phy;
742
743         platform_device_unregister(glue->musb); /* Frees glue ! */
744         usb_phy_generic_unregister(usb_phy);
745
746         return 0;
747 }
748
749 static const struct of_device_id sunxi_musb_match[] = {
750         { .compatible = "allwinner,sun4i-a10-musb", },
751         { .compatible = "allwinner,sun6i-a31-musb", },
752         { .compatible = "allwinner,sun8i-a33-musb", },
753         {}
754 };
755
756 static struct platform_driver sunxi_musb_driver = {
757         .probe = sunxi_musb_probe,
758         .remove = sunxi_musb_remove,
759         .driver = {
760                 .name = "musb-sunxi",
761                 .of_match_table = sunxi_musb_match,
762         },
763 };
764 module_platform_driver(sunxi_musb_driver);
765
766 MODULE_DESCRIPTION("Allwinner sunxi MUSB Glue Layer");
767 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
768 MODULE_LICENSE("GPL v2");