1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * PXA27x USB device driver for u-boot.
4 *
5 * Copyright (C) 2007 Rodolfo Giometti <giometti@linux.it>
6 * Copyright (C) 2007 Eurotech S.p.A. <info@eurotech.it>
7 * Copyright (C) 2008 Vivek Kutal <vivek.kutal@azingo.com>
8 */
9
10
11 #include <common.h>
12 #include <asm/arch/hardware.h>
13 #include <asm/byteorder.h>
14 #include <asm/io.h>
15 #include <usbdevice.h>
16 #include <usb/pxa27x_udc.h>
17 #include <usb/udc.h>
18
19 #include "ep0.h"
20
21 /* number of endpoints on this UDC */
22 #define UDC_MAX_ENDPOINTS 24
23
24 static struct urb *ep0_urb;
25 static struct usb_device_instance *udc_device;
26 static int ep0state = EP0_IDLE;
27
28 #ifdef USBDDBG
udc_dump_buffer(char * name,u8 * buf,int len)29 static void udc_dump_buffer(char *name, u8 *buf, int len)
30 {
31 usbdbg("%s - buf %p, len %d", name, buf, len);
32 print_buffer(0, buf, 1, len, 0);
33 }
34 #else
35 #define udc_dump_buffer(name, buf, len) /* void */
36 #endif
37
udc_ack_int_UDCCR(int mask)38 static inline void udc_ack_int_UDCCR(int mask)
39 {
40 writel(readl(USIR1) | mask, USIR1);
41 }
42
43 /*
44 * If the endpoint has an active tx_urb, then the next packet of data from the
45 * URB is written to the tx FIFO.
46 * The total amount of data in the urb is given by urb->actual_length.
47 * The maximum amount of data that can be sent in any one packet is given by
48 * endpoint->tx_packetSize.
49 * The number of data bytes from this URB that have already been transmitted
50 * is given by endpoint->sent.
51 * endpoint->last is updated by this routine with the number of data bytes
52 * transmitted in this packet.
53 */
udc_write_urb(struct usb_endpoint_instance * endpoint)54 static int udc_write_urb(struct usb_endpoint_instance *endpoint)
55 {
56 struct urb *urb = endpoint->tx_urb;
57 int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
58 u32 *data32 = (u32 *) urb->buffer;
59 u8 *data8 = (u8 *) urb->buffer;
60 unsigned int i, n, w, b, is_short;
61 int timeout = 2000; /* 2ms */
62
63 if (!urb || !urb->actual_length)
64 return -1;
65
66 n = min_t(unsigned int, urb->actual_length - endpoint->sent,
67 endpoint->tx_packetSize);
68 if (n <= 0)
69 return -1;
70
71 usbdbg("write urb on ep %d", ep_num);
72 #if defined(USBDDBG) && defined(USBDPARANOIA)
73 usbdbg("urb: buf %p, buf_len %d, actual_len %d",
74 urb->buffer, urb->buffer_length, urb->actual_length);
75 usbdbg("endpoint: sent %d, tx_packetSize %d, last %d",
76 endpoint->sent, endpoint->tx_packetSize, endpoint->last);
77 #endif
78
79 is_short = n != endpoint->tx_packetSize;
80 w = n / 4;
81 b = n % 4;
82 usbdbg("n %d%s w %d b %d", n, is_short ? "-s" : "", w, b);
83 udc_dump_buffer("urb write", data8 + endpoint->sent, n);
84
85 /* Prepare for data send */
86 if (ep_num)
87 writel(UDCCSR_PC ,UDCCSN(ep_num));
88
89 for (i = 0; i < w; i++)
90 writel(data32[endpoint->sent / 4 + i], UDCDN(ep_num));
91
92 for (i = 0; i < b; i++)
93 writeb(data8[endpoint->sent + w * 4 + i], UDCDN(ep_num));
94
95 /* Set "Packet Complete" if less data then tx_packetSize */
96 if (is_short)
97 writel(ep_num ? UDCCSR_SP : UDCCSR0_IPR, UDCCSN(ep_num));
98
99 /* Wait for data sent */
100 if (ep_num) {
101 while (!(readl(UDCCSN(ep_num)) & UDCCSR_PC)) {
102 if (timeout-- == 0)
103 return -1;
104 else
105 udelay(1);
106 }
107 }
108
109 endpoint->last = n;
110
111 if (ep_num) {
112 usbd_tx_complete(endpoint);
113 } else {
114 endpoint->sent += n;
115 endpoint->last -= n;
116 }
117
118 if (endpoint->sent >= urb->actual_length) {
119 urb->actual_length = 0;
120 endpoint->sent = 0;
121 endpoint->last = 0;
122 }
123
124 if ((endpoint->sent >= urb->actual_length) && (!ep_num)) {
125 usbdbg("ep0 IN stage done");
126 if (is_short)
127 ep0state = EP0_IDLE;
128 else
129 ep0state = EP0_XFER_COMPLETE;
130 }
131
132 return 0;
133 }
134
udc_read_urb(struct usb_endpoint_instance * endpoint)135 static int udc_read_urb(struct usb_endpoint_instance *endpoint)
136 {
137 struct urb *urb = endpoint->rcv_urb;
138 int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
139 u32 *data32 = (u32 *) urb->buffer;
140 unsigned int i, n;
141
142 usbdbg("read urb on ep %d", ep_num);
143 #if defined(USBDDBG) && defined(USBDPARANOIA)
144 usbdbg("urb: buf %p, buf_len %d, actual_len %d",
145 urb->buffer, urb->buffer_length, urb->actual_length);
146 usbdbg("endpoint: rcv_packetSize %d",
147 endpoint->rcv_packetSize);
148 #endif
149
150 if (readl(UDCCSN(ep_num)) & UDCCSR_BNE)
151 n = readl(UDCBCN(ep_num)) & 0x3ff;
152 else /* zlp */
153 n = 0;
154
155 usbdbg("n %d%s", n, n != endpoint->rcv_packetSize ? "-s" : "");
156 for (i = 0; i < n; i += 4)
157 data32[urb->actual_length / 4 + i / 4] = readl(UDCDN(ep_num));
158
159 udc_dump_buffer("urb read", (u8 *) data32, urb->actual_length + n);
160 usbd_rcv_complete(endpoint, n, 0);
161
162 return 0;
163 }
164
udc_read_urb_ep0(void)165 static int udc_read_urb_ep0(void)
166 {
167 u32 *data32 = (u32 *) ep0_urb->buffer;
168 u8 *data8 = (u8 *) ep0_urb->buffer;
169 unsigned int i, n, w, b;
170
171 usbdbg("read urb on ep 0");
172 #if defined(USBDDBG) && defined(USBDPARANOIA)
173 usbdbg("urb: buf %p, buf_len %d, actual_len %d",
174 ep0_urb->buffer, ep0_urb->buffer_length, ep0_urb->actual_length);
175 #endif
176
177 n = readl(UDCBCR0);
178 w = n / 4;
179 b = n % 4;
180
181 for (i = 0; i < w; i++) {
182 data32[ep0_urb->actual_length / 4 + i] = readl(UDCDN(0));
183 /* ep0_urb->actual_length += 4; */
184 }
185
186 for (i = 0; i < b; i++) {
187 data8[ep0_urb->actual_length + w * 4 + i] = readb(UDCDN(0));
188 /* ep0_urb->actual_length++; */
189 }
190
191 ep0_urb->actual_length += n;
192
193 udc_dump_buffer("urb read", (u8 *) data32, ep0_urb->actual_length);
194
195 writel(UDCCSR0_OPC | UDCCSR0_IPR, UDCCSR0);
196 if (ep0_urb->actual_length == ep0_urb->device_request.wLength)
197 return 1;
198
199 return 0;
200 }
201
udc_handle_ep0(struct usb_endpoint_instance * endpoint)202 static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
203 {
204 u32 udccsr0 = readl(UDCCSR0);
205 u32 *data = (u32 *) &ep0_urb->device_request;
206 int i;
207
208 usbdbg("udccsr0 %x", udccsr0);
209
210 /* Clear stall status */
211 if (udccsr0 & UDCCSR0_SST) {
212 usberr("clear stall status");
213 writel(UDCCSR0_SST, UDCCSR0);
214 ep0state = EP0_IDLE;
215 }
216
217 /* previous request unfinished? non-error iff back-to-back ... */
218 if ((udccsr0 & UDCCSR0_SA) != 0 && ep0state != EP0_IDLE)
219 ep0state = EP0_IDLE;
220
221 switch (ep0state) {
222
223 case EP0_IDLE:
224 udccsr0 = readl(UDCCSR0);
225 /* Start control request? */
226 if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE))
227 == (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) {
228
229 /* Read SETUP packet.
230 * SETUP packet size is 8 bytes (aka 2 words)
231 */
232 usbdbg("try reading SETUP packet");
233 for (i = 0; i < 2; i++) {
234 if ((readl(UDCCSR0) & UDCCSR0_RNE) == 0) {
235 usberr("setup packet too short:%d", i);
236 goto stall;
237 }
238 data[i] = readl(UDCDR0);
239 }
240
241 writel(readl(UDCCSR0) | UDCCSR0_OPC | UDCCSR0_SA, UDCCSR0);
242 if ((readl(UDCCSR0) & UDCCSR0_RNE) != 0) {
243 usberr("setup packet too long");
244 goto stall;
245 }
246
247 udc_dump_buffer("ep0 setup read", (u8 *) data, 8);
248
249 if (ep0_urb->device_request.wLength == 0) {
250 usbdbg("Zero Data control Packet\n");
251 if (ep0_recv_setup(ep0_urb)) {
252 usberr("Invalid Setup Packet\n");
253 udc_dump_buffer("ep0 setup read",
254 (u8 *)data, 8);
255 goto stall;
256 }
257 writel(UDCCSR0_IPR, UDCCSR0);
258 ep0state = EP0_IDLE;
259 } else {
260 /* Check direction */
261 if ((ep0_urb->device_request.bmRequestType &
262 USB_REQ_DIRECTION_MASK)
263 == USB_REQ_HOST2DEVICE) {
264 ep0state = EP0_OUT_DATA;
265 ep0_urb->buffer =
266 (u8 *)ep0_urb->buffer_data;
267 ep0_urb->buffer_length =
268 sizeof(ep0_urb->buffer_data);
269 ep0_urb->actual_length = 0;
270 writel(UDCCSR0_IPR, UDCCSR0);
271 } else {
272 /* The ep0_recv_setup function has
273 * already placed our response packet
274 * data in ep0_urb->buffer and the
275 * packet length in
276 * ep0_urb->actual_length.
277 */
278 if (ep0_recv_setup(ep0_urb)) {
279 stall:
280 usberr("Invalid setup packet");
281 udc_dump_buffer("ep0 setup read"
282 , (u8 *) data, 8);
283 ep0state = EP0_IDLE;
284
285 writel(UDCCSR0_SA |
286 UDCCSR0_OPC | UDCCSR0_FST |
287 UDCCS0_FTF, UDCCSR0);
288
289 return;
290 }
291
292 endpoint->tx_urb = ep0_urb;
293 endpoint->sent = 0;
294 usbdbg("EP0_IN_DATA");
295 ep0state = EP0_IN_DATA;
296 if (udc_write_urb(endpoint) < 0)
297 goto stall;
298
299 }
300 }
301 return;
302 } else if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA))
303 == (UDCCSR0_OPC|UDCCSR0_SA)) {
304 usberr("Setup Active but no data. Stalling ....\n");
305 goto stall;
306 } else {
307 usbdbg("random early IRQs");
308 /* Some random early IRQs:
309 * - we acked FST
310 * - IPR cleared
311 * - OPC got set, without SA (likely status stage)
312 */
313 writel(udccsr0 & (UDCCSR0_SA | UDCCSR0_OPC), UDCCSR0);
314 }
315 break;
316
317 case EP0_OUT_DATA:
318
319 if ((udccsr0 & UDCCSR0_OPC) && !(udccsr0 & UDCCSR0_SA)) {
320 if (udc_read_urb_ep0()) {
321 read_complete:
322 ep0state = EP0_IDLE;
323 if (ep0_recv_setup(ep0_urb)) {
324 /* Not a setup packet, stall next
325 * EP0 transaction
326 */
327 udc_dump_buffer("ep0 setup read",
328 (u8 *) data, 8);
329 usberr("can't parse setup packet\n");
330 goto stall;
331 }
332 }
333 } else if (!(udccsr0 & UDCCSR0_OPC) &&
334 !(udccsr0 & UDCCSR0_IPR)) {
335 if (ep0_urb->device_request.wLength ==
336 ep0_urb->actual_length)
337 goto read_complete;
338
339 usberr("Premature Status\n");
340 ep0state = EP0_IDLE;
341 }
342 break;
343
344 case EP0_IN_DATA:
345 /* GET_DESCRIPTOR etc */
346 if (udccsr0 & UDCCSR0_OPC) {
347 writel(UDCCSR0_OPC | UDCCSR0_FTF, UDCCSR0);
348 usberr("ep0in premature status");
349 ep0state = EP0_IDLE;
350 } else {
351 /* irq was IPR clearing */
352 if (udc_write_urb(endpoint) < 0) {
353 usberr("ep0_write_error\n");
354 goto stall;
355 }
356 }
357 break;
358
359 case EP0_XFER_COMPLETE:
360 writel(UDCCSR0_IPR, UDCCSR0);
361 ep0state = EP0_IDLE;
362 break;
363
364 default:
365 usbdbg("Default\n");
366 }
367 writel(USIR0_IR0, USIR0);
368 }
369
udc_handle_ep(struct usb_endpoint_instance * endpoint)370 static void udc_handle_ep(struct usb_endpoint_instance *endpoint)
371 {
372 int ep_addr = endpoint->endpoint_address;
373 int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
374 int ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT;
375
376 u32 flags = readl(UDCCSN(ep_num)) & (UDCCSR_SST | UDCCSR_TRN);
377 if (flags)
378 writel(flags, UDCCSN(ep_num));
379
380 if (ep_isout)
381 udc_read_urb(endpoint);
382 else
383 udc_write_urb(endpoint);
384
385 writel(UDCCSR_PC, UDCCSN(ep_num));
386 }
387
udc_state_changed(void)388 static void udc_state_changed(void)
389 {
390
391 writel(readl(UDCCR) | UDCCR_SMAC, UDCCR);
392
393 usbdbg("New UDC settings are: conf %d - inter %d - alter %d",
394 (readl(UDCCR) & UDCCR_ACN) >> UDCCR_ACN_S,
395 (readl(UDCCR) & UDCCR_AIN) >> UDCCR_AIN_S,
396 (readl(UDCCR) & UDCCR_AAISN) >> UDCCR_AAISN_S);
397
398 usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0);
399 writel(UDCISR1_IRCC, UDCISR1);
400 }
401
udc_irq(void)402 void udc_irq(void)
403 {
404 int handled;
405 struct usb_endpoint_instance *endpoint;
406 int ep_num, i;
407 u32 udcisr0;
408
409 do {
410 handled = 0;
411 /* Suspend Interrupt Request */
412 if (readl(USIR1) & UDCCR_SUSIR) {
413 usbdbg("Suspend\n");
414 udc_ack_int_UDCCR(UDCCR_SUSIR);
415 handled = 1;
416 ep0state = EP0_IDLE;
417 }
418
419 /* Resume Interrupt Request */
420 if (readl(USIR1) & UDCCR_RESIR) {
421 udc_ack_int_UDCCR(UDCCR_RESIR);
422 handled = 1;
423 usbdbg("USB resume\n");
424 }
425
426 if (readl(USIR1) & (1<<31)) {
427 handled = 1;
428 udc_state_changed();
429 }
430
431 /* Reset Interrupt Request */
432 if (readl(USIR1) & UDCCR_RSTIR) {
433 udc_ack_int_UDCCR(UDCCR_RSTIR);
434 handled = 1;
435 usbdbg("Reset\n");
436 usbd_device_event_irq(udc_device, DEVICE_RESET, 0);
437 } else {
438 if (readl(USIR0))
439 usbdbg("UISR0: %x \n", readl(USIR0));
440
441 if (readl(USIR0) & 0x2)
442 writel(0x2, USIR0);
443
444 /* Control traffic */
445 if (readl(USIR0) & USIR0_IR0) {
446 handled = 1;
447 writel(USIR0_IR0, USIR0);
448 udc_handle_ep0(udc_device->bus->endpoint_array);
449 }
450
451 endpoint = udc_device->bus->endpoint_array;
452 for (i = 0; i < udc_device->bus->max_endpoints; i++) {
453 ep_num = (endpoint[i].endpoint_address) &
454 USB_ENDPOINT_NUMBER_MASK;
455 if (!ep_num)
456 continue;
457 udcisr0 = readl(UDCISR0);
458 if (udcisr0 &
459 UDCISR_INT(ep_num, UDC_INT_PACKETCMP)) {
460 writel(UDCISR_INT(ep_num, UDC_INT_PACKETCMP),
461 UDCISR0);
462 udc_handle_ep(&endpoint[i]);
463 }
464 }
465 }
466
467 } while (handled);
468 }
469
470 /* The UDCCR reg contains mask and interrupt status bits,
471 * so using '|=' isn't safe as it may ack an interrupt.
472 */
473 #define UDCCR_OEN (1 << 31) /* On-the-Go Enable */
474 #define UDCCR_MASK_BITS (UDCCR_OEN | UDCCR_UDE)
475
udc_set_mask_UDCCR(int mask)476 static inline void udc_set_mask_UDCCR(int mask)
477 {
478 writel((readl(UDCCR) & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS), UDCCR);
479 }
480
udc_clear_mask_UDCCR(int mask)481 static inline void udc_clear_mask_UDCCR(int mask)
482 {
483 writel((readl(UDCCR) & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS), UDCCR);
484 }
485
pio_irq_enable(int ep_num)486 static void pio_irq_enable(int ep_num)
487 {
488 if (ep_num < 16)
489 writel(readl(UDCICR0) | 3 << (ep_num * 2), UDCICR0);
490 else {
491 ep_num -= 16;
492 writel(readl(UDCICR1) | 3 << (ep_num * 2), UDCICR1);
493 }
494 }
495
496 /*
497 * udc_set_nak
498 *
499 * Allow upper layers to signal lower layers should not accept more RX data
500 */
udc_set_nak(int ep_num)501 void udc_set_nak(int ep_num)
502 {
503 /* TODO */
504 }
505
506 /*
507 * udc_unset_nak
508 *
509 * Suspend sending of NAK tokens for DATA OUT tokens on a given endpoint.
510 * Switch off NAKing on this endpoint to accept more data output from host.
511 */
udc_unset_nak(int ep_num)512 void udc_unset_nak(int ep_num)
513 {
514 /* TODO */
515 }
516
udc_endpoint_write(struct usb_endpoint_instance * endpoint)517 int udc_endpoint_write(struct usb_endpoint_instance *endpoint)
518 {
519 return udc_write_urb(endpoint);
520 }
521
522 /* Associate a physical endpoint with endpoint instance */
udc_setup_ep(struct usb_device_instance * device,unsigned int id,struct usb_endpoint_instance * endpoint)523 void udc_setup_ep(struct usb_device_instance *device, unsigned int id,
524 struct usb_endpoint_instance *endpoint)
525 {
526 int ep_num, ep_addr, ep_isout, ep_type, ep_size;
527 int config, interface, alternate;
528 u32 tmp;
529
530 usbdbg("setting up endpoint id %d", id);
531
532 if (!endpoint) {
533 usberr("endpoint void!");
534 return;
535 }
536
537 ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
538 if (ep_num >= UDC_MAX_ENDPOINTS) {
539 usberr("unable to setup ep %d!", ep_num);
540 return;
541 }
542
543 pio_irq_enable(ep_num);
544 if (ep_num == 0) {
545 /* Done for ep0 */
546 return;
547 }
548
549 config = 1;
550 interface = 0;
551 alternate = 0;
552
553 usbdbg("config %d - interface %d - alternate %d",
554 config, interface, alternate);
555
556 ep_addr = endpoint->endpoint_address;
557 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
558 ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT;
559 ep_type = ep_isout ? endpoint->rcv_attributes : endpoint->tx_attributes;
560 ep_size = ep_isout ? endpoint->rcv_packetSize : endpoint->tx_packetSize;
561
562 usbdbg("addr %x, num %d, dir %s, type %s, packet size %d",
563 ep_addr, ep_num,
564 ep_isout ? "out" : "in",
565 ep_type == USB_ENDPOINT_XFER_ISOC ? "isoc" :
566 ep_type == USB_ENDPOINT_XFER_BULK ? "bulk" :
567 ep_type == USB_ENDPOINT_XFER_INT ? "int" : "???",
568 ep_size
569 );
570
571 /* Configure UDCCRx */
572 tmp = 0;
573 tmp |= (config << UDCCONR_CN_S) & UDCCONR_CN;
574 tmp |= (interface << UDCCONR_IN_S) & UDCCONR_IN;
575 tmp |= (alternate << UDCCONR_AISN_S) & UDCCONR_AISN;
576 tmp |= (ep_num << UDCCONR_EN_S) & UDCCONR_EN;
577 tmp |= (ep_type << UDCCONR_ET_S) & UDCCONR_ET;
578 tmp |= ep_isout ? 0 : UDCCONR_ED;
579 tmp |= (ep_size << UDCCONR_MPS_S) & UDCCONR_MPS;
580 tmp |= UDCCONR_EE;
581
582 writel(tmp, UDCCN(ep_num));
583
584 usbdbg("UDCCR%c = %x", 'A' + ep_num-1, readl(UDCCN(ep_num)));
585 usbdbg("UDCCSR%c = %x", 'A' + ep_num-1, readl(UDCCSN(ep_num)));
586 }
587
588 /* Connect the USB device to the bus */
udc_connect(void)589 void udc_connect(void)
590 {
591 usbdbg("UDC connect");
592
593 #ifdef CONFIG_USB_DEV_PULLUP_GPIO
594 /* Turn on the USB connection by enabling the pullup resistor */
595 writel(readl(GPDR(CONFIG_USB_DEV_PULLUP_GPIO))
596 | GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO),
597 GPDR(CONFIG_USB_DEV_PULLUP_GPIO));
598 writel(GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO), GPSR(CONFIG_USB_DEV_PULLUP_GPIO));
599 #else
600 /* Host port 2 transceiver D+ pull up enable */
601 writel(readl(UP2OCR) | UP2OCR_DPPUE, UP2OCR);
602 #endif
603 }
604
605 /* Disconnect the USB device to the bus */
udc_disconnect(void)606 void udc_disconnect(void)
607 {
608 usbdbg("UDC disconnect");
609
610 #ifdef CONFIG_USB_DEV_PULLUP_GPIO
611 /* Turn off the USB connection by disabling the pullup resistor */
612 writel(GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO), GPCR(CONFIG_USB_DEV_PULLUP_GPIO));
613 #else
614 /* Host port 2 transceiver D+ pull up disable */
615 writel(readl(UP2OCR) & ~UP2OCR_DPPUE, UP2OCR);
616 #endif
617 }
618
619 /* Switch on the UDC */
udc_enable(struct usb_device_instance * device)620 void udc_enable(struct usb_device_instance *device)
621 {
622
623 ep0state = EP0_IDLE;
624
625 /* enable endpoint 0, A, B's Packet Complete Interrupt. */
626 writel(0xffffffff, UDCICR0);
627 writel(0xa8000000, UDCICR1);
628
629 /* clear the interrupt status/control registers */
630 writel(0xffffffff, UDCISR0);
631 writel(0xffffffff, UDCISR1);
632
633 /* set UDC-enable */
634 udc_set_mask_UDCCR(UDCCR_UDE);
635
636 udc_device = device;
637 if (!ep0_urb)
638 ep0_urb = usbd_alloc_urb(udc_device,
639 udc_device->bus->endpoint_array);
640 else
641 usbinfo("ep0_urb %p already allocated", ep0_urb);
642
643 usbdbg("UDC Enabled\n");
644 }
645
646 /* Need to check this again */
udc_disable(void)647 void udc_disable(void)
648 {
649 usbdbg("disable UDC");
650
651 udc_clear_mask_UDCCR(UDCCR_UDE);
652
653 /* Disable clock for USB device */
654 writel(readl(CKEN) & ~CKEN11_USB, CKEN);
655
656 /* Free ep0 URB */
657 if (ep0_urb) {
658 usbd_dealloc_urb(ep0_urb);
659 ep0_urb = NULL;
660 }
661
662 /* Reset device pointer */
663 udc_device = NULL;
664 }
665
666 /* Allow udc code to do any additional startup */
udc_startup_events(struct usb_device_instance * device)667 void udc_startup_events(struct usb_device_instance *device)
668 {
669 /* The DEVICE_INIT event puts the USB device in the state STATE_INIT */
670 usbd_device_event_irq(device, DEVICE_INIT, 0);
671
672 /* The DEVICE_CREATE event puts the USB device in the state
673 * STATE_ATTACHED */
674 usbd_device_event_irq(device, DEVICE_CREATE, 0);
675
676 /* Some USB controller driver implementations signal
677 * DEVICE_HUB_CONFIGURED and DEVICE_RESET events here.
678 * DEVICE_HUB_CONFIGURED causes a transition to the state
679 * STATE_POWERED, and DEVICE_RESET causes a transition to
680 * the state STATE_DEFAULT.
681 */
682 udc_enable(device);
683 }
684
685 /* Initialize h/w stuff */
udc_init(void)686 int udc_init(void)
687 {
688 udc_device = NULL;
689 usbdbg("PXA27x usbd start");
690
691 /* Enable clock for USB device */
692 writel(readl(CKEN) | CKEN11_USB, CKEN);
693
694 /* Disable the UDC */
695 udc_clear_mask_UDCCR(UDCCR_UDE);
696
697 /* Disable IRQs: we don't use them */
698 writel(0, UDCICR0);
699 writel(0, UDCICR1);
700
701 return 0;
702 }
703