1
2
3
4
5
6
7
8
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/delay.h>
14#include <linux/ioport.h>
15#include <linux/slab.h>
16#include <linux/errno.h>
17#include <linux/list.h>
18#include <linux/interrupt.h>
19#include <linux/proc_fs.h>
20#include <linux/prefetch.h>
21#include <linux/clk.h>
22#include <linux/usb/gadget.h>
23#include <linux/of.h>
24#include <linux/of_gpio.h>
25#include <linux/regmap.h>
26#include <linux/dma-mapping.h>
27#include <linux/bcd.h>
28#include <linux/version.h>
29#include <linux/usb.h>
30#include <linux/usb/hcd.h>
31
32#include "vhub.h"
33
34
35
36
37
38
39
40
41
42
43
44#define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR)
45#define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL)
46
47enum {
48 AST_VHUB_STR_INDEX_MAX = 4,
49 AST_VHUB_STR_MANUF = 3,
50 AST_VHUB_STR_PRODUCT = 2,
51 AST_VHUB_STR_SERIAL = 1,
52};
53
54static const struct usb_device_descriptor ast_vhub_dev_desc = {
55 .bLength = USB_DT_DEVICE_SIZE,
56 .bDescriptorType = USB_DT_DEVICE,
57 .bcdUSB = cpu_to_le16(0x0200),
58 .bDeviceClass = USB_CLASS_HUB,
59 .bDeviceSubClass = 0,
60 .bDeviceProtocol = 1,
61 .bMaxPacketSize0 = 64,
62 .idVendor = cpu_to_le16(0x1d6b),
63 .idProduct = cpu_to_le16(0x0107),
64 .bcdDevice = cpu_to_le16(0x0100),
65 .iManufacturer = AST_VHUB_STR_MANUF,
66 .iProduct = AST_VHUB_STR_PRODUCT,
67 .iSerialNumber = AST_VHUB_STR_SERIAL,
68 .bNumConfigurations = 1,
69};
70
71
72
73
74
75
76
77
78
79
80
81#define AST_VHUB_CONF_DESC_SIZE (USB_DT_CONFIG_SIZE + \
82 USB_DT_INTERFACE_SIZE + \
83 USB_DT_ENDPOINT_SIZE)
84
85static const struct ast_vhub_full_cdesc ast_vhub_conf_desc = {
86 .cfg = {
87 .bLength = USB_DT_CONFIG_SIZE,
88 .bDescriptorType = USB_DT_CONFIG,
89 .wTotalLength = cpu_to_le16(AST_VHUB_CONF_DESC_SIZE),
90 .bNumInterfaces = 1,
91 .bConfigurationValue = 1,
92 .iConfiguration = 0,
93 .bmAttributes = USB_CONFIG_ATT_ONE |
94 USB_CONFIG_ATT_SELFPOWER |
95 USB_CONFIG_ATT_WAKEUP,
96 .bMaxPower = 0,
97 },
98 .intf = {
99 .bLength = USB_DT_INTERFACE_SIZE,
100 .bDescriptorType = USB_DT_INTERFACE,
101 .bInterfaceNumber = 0,
102 .bAlternateSetting = 0,
103 .bNumEndpoints = 1,
104 .bInterfaceClass = USB_CLASS_HUB,
105 .bInterfaceSubClass = 0,
106 .bInterfaceProtocol = 0,
107 .iInterface = 0,
108 },
109 .ep = {
110 .bLength = USB_DT_ENDPOINT_SIZE,
111 .bDescriptorType = USB_DT_ENDPOINT,
112 .bEndpointAddress = 0x81,
113 .bmAttributes = USB_ENDPOINT_XFER_INT,
114 .wMaxPacketSize = cpu_to_le16(1),
115 .bInterval = 0x0c,
116 },
117};
118
119#define AST_VHUB_HUB_DESC_SIZE (USB_DT_HUB_NONVAR_SIZE + 2)
120
121static const struct usb_hub_descriptor ast_vhub_hub_desc = {
122 .bDescLength = AST_VHUB_HUB_DESC_SIZE,
123 .bDescriptorType = USB_DT_HUB,
124 .bNbrPorts = AST_VHUB_NUM_PORTS,
125 .wHubCharacteristics = cpu_to_le16(HUB_CHAR_NO_LPSM),
126 .bPwrOn2PwrGood = 10,
127 .bHubContrCurrent = 0,
128 .u.hs.DeviceRemovable[0] = 0,
129 .u.hs.DeviceRemovable[1] = 0xff,
130};
131
132
133
134
135
136static const struct usb_string ast_vhub_str_array[] = {
137 {
138 .id = AST_VHUB_STR_SERIAL,
139 .s = "00000000"
140 },
141 {
142 .id = AST_VHUB_STR_PRODUCT,
143 .s = "USB Virtual Hub"
144 },
145 {
146 .id = AST_VHUB_STR_MANUF,
147 .s = "Aspeed"
148 },
149 { }
150};
151
152static const struct usb_gadget_strings ast_vhub_strings = {
153 .language = 0x0409,
154 .strings = (struct usb_string *)ast_vhub_str_array
155};
156
157static int ast_vhub_hub_dev_status(struct ast_vhub_ep *ep,
158 u16 wIndex, u16 wValue)
159{
160 u8 st0;
161
162 EPDBG(ep, "GET_STATUS(dev)\n");
163
164
165
166
167
168 st0 = 1 << USB_DEVICE_SELF_POWERED;
169
170
171
172
173
174 if (ep->vhub->wakeup_en)
175 st0 |= 1 << USB_DEVICE_REMOTE_WAKEUP;
176
177 return ast_vhub_simple_reply(ep, st0, 0);
178}
179
180static int ast_vhub_hub_ep_status(struct ast_vhub_ep *ep,
181 u16 wIndex, u16 wValue)
182{
183 int ep_num;
184 u8 st0 = 0;
185
186 ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK;
187 EPDBG(ep, "GET_STATUS(ep%d)\n", ep_num);
188
189
190 if (ep_num == 1) {
191 if (ep->vhub->ep1_stalled)
192 st0 |= 1 << USB_ENDPOINT_HALT;
193 } else if (ep_num != 0)
194 return std_req_stall;
195
196 return ast_vhub_simple_reply(ep, st0, 0);
197}
198
199static int ast_vhub_hub_dev_feature(struct ast_vhub_ep *ep,
200 u16 wIndex, u16 wValue,
201 bool is_set)
202{
203 EPDBG(ep, "%s_FEATURE(dev val=%02x)\n",
204 is_set ? "SET" : "CLEAR", wValue);
205
206 if (wValue != USB_DEVICE_REMOTE_WAKEUP)
207 return std_req_stall;
208
209 ep->vhub->wakeup_en = is_set;
210 EPDBG(ep, "Hub remote wakeup %s\n",
211 is_set ? "enabled" : "disabled");
212
213 return std_req_complete;
214}
215
216static int ast_vhub_hub_ep_feature(struct ast_vhub_ep *ep,
217 u16 wIndex, u16 wValue,
218 bool is_set)
219{
220 int ep_num;
221 u32 reg;
222
223 ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK;
224 EPDBG(ep, "%s_FEATURE(ep%d val=%02x)\n",
225 is_set ? "SET" : "CLEAR", ep_num, wValue);
226
227 if (ep_num > 1)
228 return std_req_stall;
229 if (wValue != USB_ENDPOINT_HALT)
230 return std_req_stall;
231 if (ep_num == 0)
232 return std_req_complete;
233
234 EPDBG(ep, "%s stall on EP 1\n",
235 is_set ? "setting" : "clearing");
236
237 ep->vhub->ep1_stalled = is_set;
238 reg = readl(ep->vhub->regs + AST_VHUB_EP1_CTRL);
239 if (is_set) {
240 reg |= VHUB_EP1_CTRL_STALL;
241 } else {
242 reg &= ~VHUB_EP1_CTRL_STALL;
243 reg |= VHUB_EP1_CTRL_RESET_TOGGLE;
244 }
245 writel(reg, ep->vhub->regs + AST_VHUB_EP1_CTRL);
246
247 return std_req_complete;
248}
249
250static int ast_vhub_rep_desc(struct ast_vhub_ep *ep,
251 u8 desc_type, u16 len)
252{
253 size_t dsize;
254 struct ast_vhub *vhub = ep->vhub;
255
256 EPDBG(ep, "GET_DESCRIPTOR(type:%d)\n", desc_type);
257
258
259
260
261
262
263
264
265
266
267 switch(desc_type) {
268 case USB_DT_DEVICE:
269 dsize = USB_DT_DEVICE_SIZE;
270 memcpy(ep->buf, &vhub->vhub_dev_desc, dsize);
271 BUILD_BUG_ON(dsize > sizeof(vhub->vhub_dev_desc));
272 BUILD_BUG_ON(USB_DT_DEVICE_SIZE >= AST_VHUB_EP0_MAX_PACKET);
273 break;
274 case USB_DT_CONFIG:
275 dsize = AST_VHUB_CONF_DESC_SIZE;
276 memcpy(ep->buf, &vhub->vhub_conf_desc, dsize);
277 BUILD_BUG_ON(dsize > sizeof(vhub->vhub_conf_desc));
278 BUILD_BUG_ON(AST_VHUB_CONF_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
279 break;
280 case USB_DT_HUB:
281 dsize = AST_VHUB_HUB_DESC_SIZE;
282 memcpy(ep->buf, &vhub->vhub_hub_desc, dsize);
283 BUILD_BUG_ON(dsize > sizeof(vhub->vhub_hub_desc));
284 BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
285 break;
286 default:
287 return std_req_stall;
288 }
289
290
291 if (len > dsize)
292 len = dsize;
293
294
295 return ast_vhub_reply(ep, NULL, len);
296}
297
298static struct usb_gadget_strings*
299ast_vhub_str_of_container(struct usb_gadget_string_container *container)
300{
301 return (struct usb_gadget_strings *)container->stash;
302}
303
304static int ast_vhub_collect_languages(struct ast_vhub *vhub, void *buf,
305 size_t size)
306{
307 int rc, hdr_len, nlangs, max_langs;
308 struct usb_gadget_strings *lang_str;
309 struct usb_gadget_string_container *container;
310 struct usb_string_descriptor *sdesc = buf;
311
312 nlangs = 0;
313 hdr_len = sizeof(struct usb_descriptor_header);
314 max_langs = (size - hdr_len) / sizeof(sdesc->wData[0]);
315 list_for_each_entry(container, &vhub->vhub_str_desc, list) {
316 if (nlangs >= max_langs)
317 break;
318
319 lang_str = ast_vhub_str_of_container(container);
320 sdesc->wData[nlangs++] = cpu_to_le16(lang_str->language);
321 }
322
323 rc = hdr_len + nlangs * sizeof(sdesc->wData[0]);
324 sdesc->bLength = rc;
325 sdesc->bDescriptorType = USB_DT_STRING;
326
327 return rc;
328}
329
330static struct usb_gadget_strings *ast_vhub_lookup_string(struct ast_vhub *vhub,
331 u16 lang_id)
332{
333 struct usb_gadget_strings *lang_str;
334 struct usb_gadget_string_container *container;
335
336 list_for_each_entry(container, &vhub->vhub_str_desc, list) {
337 lang_str = ast_vhub_str_of_container(container);
338 if (lang_str->language == lang_id)
339 return lang_str;
340 }
341
342 return NULL;
343}
344
345static int ast_vhub_rep_string(struct ast_vhub_ep *ep,
346 u8 string_id, u16 lang_id,
347 u16 len)
348{
349 int rc;
350 u8 buf[256];
351 struct ast_vhub *vhub = ep->vhub;
352 struct usb_gadget_strings *lang_str;
353
354 if (string_id == 0) {
355 rc = ast_vhub_collect_languages(vhub, buf, sizeof(buf));
356 } else {
357 lang_str = ast_vhub_lookup_string(vhub, lang_id);
358 if (!lang_str)
359 return std_req_stall;
360
361 rc = usb_gadget_get_string(lang_str, string_id, buf);
362 }
363
364 if (rc < 0 || rc >= AST_VHUB_EP0_MAX_PACKET)
365 return std_req_stall;
366
367
368 memcpy(ep->buf, buf, rc);
369 return ast_vhub_reply(ep, NULL, min_t(u16, rc, len));
370}
371
372enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep,
373 struct usb_ctrlrequest *crq)
374{
375 struct ast_vhub *vhub = ep->vhub;
376 u16 wValue, wIndex, wLength;
377
378 wValue = le16_to_cpu(crq->wValue);
379 wIndex = le16_to_cpu(crq->wIndex);
380 wLength = le16_to_cpu(crq->wLength);
381
382
383 if (vhub->speed == USB_SPEED_UNKNOWN) {
384 u32 ustat = readl(vhub->regs + AST_VHUB_USBSTS);
385 if (ustat & VHUB_USBSTS_HISPEED)
386 vhub->speed = USB_SPEED_HIGH;
387 else
388 vhub->speed = USB_SPEED_FULL;
389 UDCDBG(vhub, "USB status=%08x speed=%s\n", ustat,
390 vhub->speed == USB_SPEED_HIGH ? "high" : "full");
391 }
392
393 switch ((crq->bRequestType << 8) | crq->bRequest) {
394
395 case DeviceOutRequest | USB_REQ_SET_ADDRESS:
396 EPDBG(ep, "SET_ADDRESS: Got address %x\n", wValue);
397 writel(wValue, vhub->regs + AST_VHUB_CONF);
398 return std_req_complete;
399
400
401 case DeviceRequest | USB_REQ_GET_STATUS:
402 return ast_vhub_hub_dev_status(ep, wIndex, wValue);
403 case InterfaceRequest | USB_REQ_GET_STATUS:
404 return ast_vhub_simple_reply(ep, 0, 0);
405 case EndpointRequest | USB_REQ_GET_STATUS:
406 return ast_vhub_hub_ep_status(ep, wIndex, wValue);
407
408
409 case DeviceOutRequest | USB_REQ_SET_FEATURE:
410 return ast_vhub_hub_dev_feature(ep, wIndex, wValue, true);
411 case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
412 return ast_vhub_hub_dev_feature(ep, wIndex, wValue, false);
413 case EndpointOutRequest | USB_REQ_SET_FEATURE:
414 return ast_vhub_hub_ep_feature(ep, wIndex, wValue, true);
415 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
416 return ast_vhub_hub_ep_feature(ep, wIndex, wValue, false);
417
418
419 case DeviceRequest | USB_REQ_GET_CONFIGURATION:
420 return ast_vhub_simple_reply(ep, 1);
421 case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
422 if (wValue != 1)
423 return std_req_stall;
424 return std_req_complete;
425
426
427 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
428 switch (wValue >> 8) {
429 case USB_DT_DEVICE:
430 case USB_DT_CONFIG:
431 return ast_vhub_rep_desc(ep, wValue >> 8,
432 wLength);
433 case USB_DT_STRING:
434 return ast_vhub_rep_string(ep, wValue & 0xff,
435 wIndex, wLength);
436 }
437 return std_req_stall;
438
439
440 case DeviceRequest | USB_REQ_GET_INTERFACE:
441 return ast_vhub_simple_reply(ep, 0);
442 case DeviceOutRequest | USB_REQ_SET_INTERFACE:
443 if (wValue != 0 || wIndex != 0)
444 return std_req_stall;
445 return std_req_complete;
446 }
447 return std_req_stall;
448}
449
450static void ast_vhub_update_hub_ep1(struct ast_vhub *vhub,
451 unsigned int port)
452{
453
454 u32 reg = readl(vhub->regs + AST_VHUB_EP1_STS_CHG);
455 u32 pmask = (1 << (port + 1));
456 if (vhub->ports[port].change)
457 reg |= pmask;
458 else
459 reg &= ~pmask;
460 writel(reg, vhub->regs + AST_VHUB_EP1_STS_CHG);
461}
462
463static void ast_vhub_change_port_stat(struct ast_vhub *vhub,
464 unsigned int port,
465 u16 clr_flags,
466 u16 set_flags,
467 bool set_c)
468{
469 struct ast_vhub_port *p = &vhub->ports[port];
470 u16 prev;
471
472
473 prev = p->status;
474 p->status = (prev & ~clr_flags) | set_flags;
475 DDBG(&p->dev, "port %d status %04x -> %04x (C=%d)\n",
476 port + 1, prev, p->status, set_c);
477
478
479 if (set_c) {
480 u16 chg = p->status ^ prev;
481
482
483 chg &= USB_PORT_STAT_C_CONNECTION |
484 USB_PORT_STAT_C_ENABLE |
485 USB_PORT_STAT_C_SUSPEND |
486 USB_PORT_STAT_C_OVERCURRENT |
487 USB_PORT_STAT_C_RESET |
488 USB_PORT_STAT_C_L1;
489
490
491
492
493
494 if (p->status & USB_PORT_STAT_ENABLE)
495 chg &= ~USB_PORT_STAT_C_ENABLE;
496
497 p->change = chg;
498 ast_vhub_update_hub_ep1(vhub, port);
499 }
500}
501
502static void ast_vhub_send_host_wakeup(struct ast_vhub *vhub)
503{
504 u32 reg = readl(vhub->regs + AST_VHUB_CTRL);
505 UDCDBG(vhub, "Waking up host !\n");
506 reg |= VHUB_CTRL_MANUAL_REMOTE_WAKEUP;
507 writel(reg, vhub->regs + AST_VHUB_CTRL);
508}
509
510void ast_vhub_device_connect(struct ast_vhub *vhub,
511 unsigned int port, bool on)
512{
513 if (on)
514 ast_vhub_change_port_stat(vhub, port, 0,
515 USB_PORT_STAT_CONNECTION, true);
516 else
517 ast_vhub_change_port_stat(vhub, port,
518 USB_PORT_STAT_CONNECTION |
519 USB_PORT_STAT_ENABLE,
520 0, true);
521
522
523
524
525
526 if (vhub->wakeup_en)
527 ast_vhub_send_host_wakeup(vhub);
528}
529
530static void ast_vhub_wake_work(struct work_struct *work)
531{
532 struct ast_vhub *vhub = container_of(work,
533 struct ast_vhub,
534 wake_work);
535 unsigned long flags;
536 unsigned int i;
537
538
539
540
541
542
543 spin_lock_irqsave(&vhub->lock, flags);
544 for (i = 0; i < vhub->max_ports; i++) {
545 struct ast_vhub_port *p = &vhub->ports[i];
546
547 if (!(p->status & USB_PORT_STAT_SUSPEND))
548 continue;
549 ast_vhub_change_port_stat(vhub, i,
550 USB_PORT_STAT_SUSPEND,
551 0, true);
552 ast_vhub_dev_resume(&p->dev);
553 }
554 ast_vhub_send_host_wakeup(vhub);
555 spin_unlock_irqrestore(&vhub->lock, flags);
556}
557
558void ast_vhub_hub_wake_all(struct ast_vhub *vhub)
559{
560
561
562
563
564
565 schedule_work(&vhub->wake_work);
566}
567
568static void ast_vhub_port_reset(struct ast_vhub *vhub, u8 port)
569{
570 struct ast_vhub_port *p = &vhub->ports[port];
571 u16 set, clr, speed;
572
573
574 ast_vhub_change_port_stat(vhub, port,
575 USB_PORT_STAT_ENABLE |
576 USB_PORT_STAT_SUSPEND,
577 USB_PORT_STAT_RESET,
578 false);
579
580 if (!p->dev.driver)
581 return;
582
583
584
585
586
587 ast_vhub_dev_reset(&p->dev);
588
589
590 speed = p->dev.driver->max_speed;
591 if (speed == USB_SPEED_UNKNOWN || speed > vhub->speed)
592 speed = vhub->speed;
593
594 switch (speed) {
595 case USB_SPEED_LOW:
596 set = USB_PORT_STAT_LOW_SPEED;
597 clr = USB_PORT_STAT_HIGH_SPEED;
598 break;
599 case USB_SPEED_FULL:
600 set = 0;
601 clr = USB_PORT_STAT_LOW_SPEED |
602 USB_PORT_STAT_HIGH_SPEED;
603 break;
604 case USB_SPEED_HIGH:
605 set = USB_PORT_STAT_HIGH_SPEED;
606 clr = USB_PORT_STAT_LOW_SPEED;
607 break;
608 default:
609 UDCDBG(vhub, "Unsupported speed %d when"
610 " connecting device\n",
611 speed);
612 return;
613 }
614 clr |= USB_PORT_STAT_RESET;
615 set |= USB_PORT_STAT_ENABLE;
616
617
618 ast_vhub_change_port_stat(vhub, port, clr, set, true);
619}
620
621static enum std_req_rc ast_vhub_set_port_feature(struct ast_vhub_ep *ep,
622 u8 port, u16 feat)
623{
624 struct ast_vhub *vhub = ep->vhub;
625 struct ast_vhub_port *p;
626
627 if (port == 0 || port > vhub->max_ports)
628 return std_req_stall;
629 port--;
630 p = &vhub->ports[port];
631
632 switch(feat) {
633 case USB_PORT_FEAT_SUSPEND:
634 if (!(p->status & USB_PORT_STAT_ENABLE))
635 return std_req_complete;
636 ast_vhub_change_port_stat(vhub, port,
637 0, USB_PORT_STAT_SUSPEND,
638 false);
639 ast_vhub_dev_suspend(&p->dev);
640 return std_req_complete;
641 case USB_PORT_FEAT_RESET:
642 EPDBG(ep, "Port reset !\n");
643 ast_vhub_port_reset(vhub, port);
644 return std_req_complete;
645 case USB_PORT_FEAT_POWER:
646
647
648
649
650
651 if (p->status & USB_PORT_STAT_CONNECTION) {
652 p->change |= USB_PORT_STAT_C_CONNECTION;
653 ast_vhub_update_hub_ep1(vhub, port);
654 }
655 return std_req_complete;
656 case USB_PORT_FEAT_TEST:
657 case USB_PORT_FEAT_INDICATOR:
658
659 return std_req_complete;
660 }
661 return std_req_stall;
662}
663
664static enum std_req_rc ast_vhub_clr_port_feature(struct ast_vhub_ep *ep,
665 u8 port, u16 feat)
666{
667 struct ast_vhub *vhub = ep->vhub;
668 struct ast_vhub_port *p;
669
670 if (port == 0 || port > vhub->max_ports)
671 return std_req_stall;
672 port--;
673 p = &vhub->ports[port];
674
675 switch(feat) {
676 case USB_PORT_FEAT_ENABLE:
677 ast_vhub_change_port_stat(vhub, port,
678 USB_PORT_STAT_ENABLE |
679 USB_PORT_STAT_SUSPEND, 0,
680 false);
681 ast_vhub_dev_suspend(&p->dev);
682 return std_req_complete;
683 case USB_PORT_FEAT_SUSPEND:
684 if (!(p->status & USB_PORT_STAT_SUSPEND))
685 return std_req_complete;
686 ast_vhub_change_port_stat(vhub, port,
687 USB_PORT_STAT_SUSPEND, 0,
688 false);
689 ast_vhub_dev_resume(&p->dev);
690 return std_req_complete;
691 case USB_PORT_FEAT_POWER:
692
693 return std_req_complete;
694 case USB_PORT_FEAT_INDICATOR:
695
696 return std_req_complete;
697 case USB_PORT_FEAT_C_CONNECTION:
698 case USB_PORT_FEAT_C_ENABLE:
699 case USB_PORT_FEAT_C_SUSPEND:
700 case USB_PORT_FEAT_C_OVER_CURRENT:
701 case USB_PORT_FEAT_C_RESET:
702
703 p->change &= ~(1u << (feat - 16));
704 ast_vhub_update_hub_ep1(vhub, port);
705 return std_req_complete;
706 }
707 return std_req_stall;
708}
709
710static enum std_req_rc ast_vhub_get_port_stat(struct ast_vhub_ep *ep,
711 u8 port)
712{
713 struct ast_vhub *vhub = ep->vhub;
714 u16 stat, chg;
715
716 if (port == 0 || port > vhub->max_ports)
717 return std_req_stall;
718 port--;
719
720 stat = vhub->ports[port].status;
721 chg = vhub->ports[port].change;
722
723
724 stat |= USB_PORT_STAT_POWER;
725
726 EPDBG(ep, " port status=%04x change=%04x\n", stat, chg);
727
728 return ast_vhub_simple_reply(ep,
729 stat & 0xff,
730 stat >> 8,
731 chg & 0xff,
732 chg >> 8);
733}
734
735enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep,
736 struct usb_ctrlrequest *crq)
737{
738 u16 wValue, wIndex, wLength;
739
740 wValue = le16_to_cpu(crq->wValue);
741 wIndex = le16_to_cpu(crq->wIndex);
742 wLength = le16_to_cpu(crq->wLength);
743
744 switch ((crq->bRequestType << 8) | crq->bRequest) {
745 case GetHubStatus:
746 EPDBG(ep, "GetHubStatus\n");
747 return ast_vhub_simple_reply(ep, 0, 0, 0, 0);
748 case GetPortStatus:
749 EPDBG(ep, "GetPortStatus(%d)\n", wIndex & 0xff);
750 return ast_vhub_get_port_stat(ep, wIndex & 0xf);
751 case GetHubDescriptor:
752 if (wValue != (USB_DT_HUB << 8))
753 return std_req_stall;
754 EPDBG(ep, "GetHubDescriptor(%d)\n", wIndex & 0xff);
755 return ast_vhub_rep_desc(ep, USB_DT_HUB, wLength);
756 case SetHubFeature:
757 case ClearHubFeature:
758 EPDBG(ep, "Get/SetHubFeature(%d)\n", wValue);
759
760 if (wValue == C_HUB_LOCAL_POWER ||
761 wValue == C_HUB_OVER_CURRENT)
762 return std_req_complete;
763 return std_req_stall;
764 case SetPortFeature:
765 EPDBG(ep, "SetPortFeature(%d,%d)\n", wIndex & 0xf, wValue);
766 return ast_vhub_set_port_feature(ep, wIndex & 0xf, wValue);
767 case ClearPortFeature:
768 EPDBG(ep, "ClearPortFeature(%d,%d)\n", wIndex & 0xf, wValue);
769 return ast_vhub_clr_port_feature(ep, wIndex & 0xf, wValue);
770 case ClearTTBuffer:
771 case ResetTT:
772 case StopTT:
773 return std_req_complete;
774 case GetTTState:
775 return ast_vhub_simple_reply(ep, 0, 0, 0, 0);
776 default:
777 EPDBG(ep, "Unknown class request\n");
778 }
779 return std_req_stall;
780}
781
782void ast_vhub_hub_suspend(struct ast_vhub *vhub)
783{
784 unsigned int i;
785
786 UDCDBG(vhub, "USB bus suspend\n");
787
788 if (vhub->suspended)
789 return;
790
791 vhub->suspended = true;
792
793
794
795
796
797 for (i = 0; i < vhub->max_ports; i++) {
798 struct ast_vhub_port *p = &vhub->ports[i];
799
800 if (!(p->status & USB_PORT_STAT_SUSPEND))
801 ast_vhub_dev_suspend(&p->dev);
802 }
803}
804
805void ast_vhub_hub_resume(struct ast_vhub *vhub)
806{
807 unsigned int i;
808
809 UDCDBG(vhub, "USB bus resume\n");
810
811 if (!vhub->suspended)
812 return;
813
814 vhub->suspended = false;
815
816
817
818
819
820 for (i = 0; i < vhub->max_ports; i++) {
821 struct ast_vhub_port *p = &vhub->ports[i];
822
823 if (!(p->status & USB_PORT_STAT_SUSPEND))
824 ast_vhub_dev_resume(&p->dev);
825 }
826}
827
828void ast_vhub_hub_reset(struct ast_vhub *vhub)
829{
830 unsigned int i;
831
832 UDCDBG(vhub, "USB bus reset\n");
833
834
835
836
837
838 if (vhub->speed == USB_SPEED_UNKNOWN)
839 return;
840
841
842 vhub->suspended = false;
843
844
845 vhub->speed = USB_SPEED_UNKNOWN;
846
847
848 vhub->wakeup_en = false;
849
850
851
852
853
854 for (i = 0; i < vhub->max_ports; i++) {
855 struct ast_vhub_port *p = &vhub->ports[i];
856
857
858 p->status &= USB_PORT_STAT_CONNECTION;
859 p->change = 0;
860
861
862 ast_vhub_dev_suspend(&p->dev);
863 }
864
865
866 writel(0, vhub->regs + AST_VHUB_CONF);
867 writel(0, vhub->regs + AST_VHUB_EP0_CTRL);
868 writel(VHUB_EP1_CTRL_RESET_TOGGLE |
869 VHUB_EP1_CTRL_ENABLE,
870 vhub->regs + AST_VHUB_EP1_CTRL);
871 writel(0, vhub->regs + AST_VHUB_EP1_STS_CHG);
872}
873
874static void ast_vhub_of_parse_dev_desc(struct ast_vhub *vhub,
875 const struct device_node *vhub_np)
876{
877 u16 id;
878 u32 data;
879
880 if (!of_property_read_u32(vhub_np, "vhub-vendor-id", &data)) {
881 id = (u16)data;
882 vhub->vhub_dev_desc.idVendor = cpu_to_le16(id);
883 }
884 if (!of_property_read_u32(vhub_np, "vhub-product-id", &data)) {
885 id = (u16)data;
886 vhub->vhub_dev_desc.idProduct = cpu_to_le16(id);
887 }
888 if (!of_property_read_u32(vhub_np, "vhub-device-revision", &data)) {
889 id = (u16)data;
890 vhub->vhub_dev_desc.bcdDevice = cpu_to_le16(id);
891 }
892}
893
894static void ast_vhub_fixup_usb1_dev_desc(struct ast_vhub *vhub)
895{
896 vhub->vhub_dev_desc.bcdUSB = cpu_to_le16(0x0100);
897 vhub->vhub_dev_desc.bDeviceProtocol = 0;
898}
899
900static struct usb_gadget_string_container*
901ast_vhub_str_container_alloc(struct ast_vhub *vhub)
902{
903 unsigned int size;
904 struct usb_string *str_array;
905 struct usb_gadget_strings *lang_str;
906 struct usb_gadget_string_container *container;
907
908 size = sizeof(*container);
909 size += sizeof(struct usb_gadget_strings);
910 size += sizeof(struct usb_string) * AST_VHUB_STR_INDEX_MAX;
911 container = devm_kzalloc(&vhub->pdev->dev, size, GFP_KERNEL);
912 if (!container)
913 return ERR_PTR(-ENOMEM);
914
915 lang_str = ast_vhub_str_of_container(container);
916 str_array = (struct usb_string *)(lang_str + 1);
917 lang_str->strings = str_array;
918 return container;
919}
920
921static void ast_vhub_str_deep_copy(struct usb_gadget_strings *dest,
922 const struct usb_gadget_strings *src)
923{
924 struct usb_string *src_array = src->strings;
925 struct usb_string *dest_array = dest->strings;
926
927 dest->language = src->language;
928 if (src_array && dest_array) {
929 do {
930 *dest_array = *src_array;
931 dest_array++;
932 src_array++;
933 } while (src_array->s);
934 }
935}
936
937static int ast_vhub_str_alloc_add(struct ast_vhub *vhub,
938 const struct usb_gadget_strings *src_str)
939{
940 struct usb_gadget_strings *dest_str;
941 struct usb_gadget_string_container *container;
942
943 container = ast_vhub_str_container_alloc(vhub);
944 if (IS_ERR(container))
945 return PTR_ERR(container);
946
947 dest_str = ast_vhub_str_of_container(container);
948 ast_vhub_str_deep_copy(dest_str, src_str);
949 list_add_tail(&container->list, &vhub->vhub_str_desc);
950
951 return 0;
952}
953
954static const struct {
955 const char *name;
956 u8 id;
957} str_id_map[] = {
958 {"manufacturer", AST_VHUB_STR_MANUF},
959 {"product", AST_VHUB_STR_PRODUCT},
960 {"serial-number", AST_VHUB_STR_SERIAL},
961 {},
962};
963
964static int ast_vhub_of_parse_str_desc(struct ast_vhub *vhub,
965 const struct device_node *desc_np)
966{
967 u32 langid;
968 int ret = 0;
969 int i, offset;
970 const char *str;
971 struct device_node *child;
972 struct usb_string str_array[AST_VHUB_STR_INDEX_MAX];
973 struct usb_gadget_strings lang_str = {
974 .strings = (struct usb_string *)str_array,
975 };
976
977 for_each_child_of_node(desc_np, child) {
978 if (of_property_read_u32(child, "reg", &langid))
979 continue;
980
981 if (!usb_validate_langid(langid))
982 continue;
983
984 lang_str.language = langid;
985 for (i = offset = 0; str_id_map[i].name; i++) {
986 str = of_get_property(child, str_id_map[i].name, NULL);
987 if (str) {
988 str_array[offset].s = str;
989 str_array[offset].id = str_id_map[i].id;
990 offset++;
991 }
992 }
993 str_array[offset].id = 0;
994 str_array[offset].s = NULL;
995
996 ret = ast_vhub_str_alloc_add(vhub, &lang_str);
997 if (ret) {
998 of_node_put(child);
999 break;
1000 }
1001 }
1002
1003 return ret;
1004}
1005
1006static int ast_vhub_init_desc(struct ast_vhub *vhub)
1007{
1008 int ret;
1009 struct device_node *desc_np;
1010 const struct device_node *vhub_np = vhub->pdev->dev.of_node;
1011
1012
1013 memcpy(&vhub->vhub_dev_desc, &ast_vhub_dev_desc,
1014 sizeof(vhub->vhub_dev_desc));
1015 ast_vhub_of_parse_dev_desc(vhub, vhub_np);
1016 if (vhub->force_usb1)
1017 ast_vhub_fixup_usb1_dev_desc(vhub);
1018
1019
1020 memcpy(&vhub->vhub_conf_desc, &ast_vhub_conf_desc,
1021 sizeof(vhub->vhub_conf_desc));
1022
1023
1024 memcpy(&vhub->vhub_hub_desc, &ast_vhub_hub_desc,
1025 sizeof(vhub->vhub_hub_desc));
1026 vhub->vhub_hub_desc.bNbrPorts = vhub->max_ports;
1027
1028
1029 INIT_LIST_HEAD(&vhub->vhub_str_desc);
1030 desc_np = of_get_child_by_name(vhub_np, "vhub-strings");
1031 if (desc_np)
1032 ret = ast_vhub_of_parse_str_desc(vhub, desc_np);
1033 else
1034 ret = ast_vhub_str_alloc_add(vhub, &ast_vhub_strings);
1035
1036 return ret;
1037}
1038
1039int ast_vhub_init_hub(struct ast_vhub *vhub)
1040{
1041 vhub->speed = USB_SPEED_UNKNOWN;
1042 INIT_WORK(&vhub->wake_work, ast_vhub_wake_work);
1043
1044 return ast_vhub_init_desc(vhub);
1045}
1046
