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10
11#define pr_fmt(fmt) "s3c2410_udc: " fmt
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/delay.h>
16#include <linux/ioport.h>
17#include <linux/sched.h>
18#include <linux/slab.h>
19#include <linux/errno.h>
20#include <linux/init.h>
21#include <linux/timer.h>
22#include <linux/list.h>
23#include <linux/interrupt.h>
24#include <linux/platform_device.h>
25#include <linux/clk.h>
26#include <linux/gpio.h>
27#include <linux/prefetch.h>
28#include <linux/io.h>
29
30#include <linux/debugfs.h>
31#include <linux/seq_file.h>
32
33#include <linux/usb.h>
34#include <linux/usb/gadget.h>
35
36#include <asm/byteorder.h>
37#include <asm/irq.h>
38#include <asm/unaligned.h>
39#include <mach/irqs.h>
40
41#include <mach/hardware.h>
42
43#include <plat/regs-udc.h>
44#include <linux/platform_data/usb-s3c2410_udc.h>
45
46
47#include "s3c2410_udc.h"
48
49#define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
50#define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
51 "Arnaud Patard <arnaud.patard@rtp-net.org>"
52
53static const char gadget_name[] = "s3c2410_udc";
54static const char driver_desc[] = DRIVER_DESC;
55
56static struct s3c2410_udc *the_controller;
57static struct clk *udc_clock;
58static struct clk *usb_bus_clock;
59static void __iomem *base_addr;
60static u64 rsrc_start;
61static u64 rsrc_len;
62static struct dentry *s3c2410_udc_debugfs_root;
63
64static inline u32 udc_read(u32 reg)
65{
66 return readb(base_addr + reg);
67}
68
69static inline void udc_write(u32 value, u32 reg)
70{
71 writeb(value, base_addr + reg);
72}
73
74static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
75{
76 writeb(value, base + reg);
77}
78
79static struct s3c2410_udc_mach_info *udc_info;
80
81
82#define DEBUG_NORMAL 1
83#define DEBUG_VERBOSE 2
84
85#ifdef CONFIG_USB_S3C2410_DEBUG
86#define USB_S3C2410_DEBUG_LEVEL 0
87
88static uint32_t s3c2410_ticks = 0;
89
90__printf(2, 3)
91static void dprintk(int level, const char *fmt, ...)
92{
93 static long prevticks;
94 static int invocation;
95 struct va_format vaf;
96 va_list args;
97
98 if (level > USB_S3C2410_DEBUG_LEVEL)
99 return;
100
101 va_start(args, fmt);
102
103 vaf.fmt = fmt;
104 vaf.va = &args;
105
106 if (s3c2410_ticks != prevticks) {
107 prevticks = s3c2410_ticks;
108 invocation = 0;
109 }
110
111 pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
112
113 va_end(args);
114}
115#else
116__printf(2, 3)
117static void dprintk(int level, const char *fmt, ...)
118{
119}
120#endif
121
122static int s3c2410_udc_debugfs_show(struct seq_file *m, void *p)
123{
124 u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
125 u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
126 u32 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2;
127 u32 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2;
128
129 addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
130 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
131 ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
132 usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
133 ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
134 usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
135 udc_write(0, S3C2410_UDC_INDEX_REG);
136 ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
137 udc_write(1, S3C2410_UDC_INDEX_REG);
138 ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
139 ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
140 ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
141 ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
142 udc_write(2, S3C2410_UDC_INDEX_REG);
143 ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
144 ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
145 ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
146 ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
147
148 seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
149 "PWR_REG : 0x%04X\n"
150 "EP_INT_REG : 0x%04X\n"
151 "USB_INT_REG : 0x%04X\n"
152 "EP_INT_EN_REG : 0x%04X\n"
153 "USB_INT_EN_REG : 0x%04X\n"
154 "EP0_CSR : 0x%04X\n"
155 "EP1_I_CSR1 : 0x%04X\n"
156 "EP1_I_CSR2 : 0x%04X\n"
157 "EP1_O_CSR1 : 0x%04X\n"
158 "EP1_O_CSR2 : 0x%04X\n"
159 "EP2_I_CSR1 : 0x%04X\n"
160 "EP2_I_CSR2 : 0x%04X\n"
161 "EP2_O_CSR1 : 0x%04X\n"
162 "EP2_O_CSR2 : 0x%04X\n",
163 addr_reg, pwr_reg, ep_int_reg, usb_int_reg,
164 ep_int_en_reg, usb_int_en_reg, ep0_csr,
165 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2,
166 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2
167 );
168
169 return 0;
170}
171DEFINE_SHOW_ATTRIBUTE(s3c2410_udc_debugfs);
172
173
174
175static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
176{
177 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
178 udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
179 S3C2410_UDC_EP0_CSR_REG);
180}
181
182static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
183{
184 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
185 writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
186}
187
188static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
189{
190 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
191 udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
192}
193
194static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
195{
196 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
197 udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
198}
199
200static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
201{
202 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
203 udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
204}
205
206inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
207{
208 udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
209 udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
210}
211
212static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
213{
214 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
215
216 udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
217 | S3C2410_UDC_EP0_CSR_DE),
218 S3C2410_UDC_EP0_CSR_REG);
219}
220
221static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
222{
223 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
224 udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
225 | S3C2410_UDC_EP0_CSR_DE),
226 S3C2410_UDC_EP0_CSR_REG);
227}
228
229
230
231
232
233
234static void s3c2410_udc_done(struct s3c2410_ep *ep,
235 struct s3c2410_request *req, int status)
236{
237 unsigned halted = ep->halted;
238
239 list_del_init(&req->queue);
240
241 if (likely(req->req.status == -EINPROGRESS))
242 req->req.status = status;
243 else
244 status = req->req.status;
245
246 ep->halted = 1;
247 usb_gadget_giveback_request(&ep->ep, &req->req);
248 ep->halted = halted;
249}
250
251static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
252 struct s3c2410_ep *ep, int status)
253{
254 while (!list_empty(&ep->queue)) {
255 struct s3c2410_request *req;
256 req = list_entry(ep->queue.next, struct s3c2410_request,
257 queue);
258 s3c2410_udc_done(ep, req, status);
259 }
260}
261
262static inline int s3c2410_udc_fifo_count_out(void)
263{
264 int tmp;
265
266 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
267 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
268 return tmp;
269}
270
271
272
273
274static inline int s3c2410_udc_write_packet(int fifo,
275 struct s3c2410_request *req,
276 unsigned max)
277{
278 unsigned len = min(req->req.length - req->req.actual, max);
279 u8 *buf = req->req.buf + req->req.actual;
280
281 prefetch(buf);
282
283 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
284 req->req.actual, req->req.length, len, req->req.actual + len);
285
286 req->req.actual += len;
287
288 udelay(5);
289 writesb(base_addr + fifo, buf, len);
290 return len;
291}
292
293
294
295
296
297
298static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
299 struct s3c2410_request *req)
300{
301 unsigned count;
302 int is_last;
303 u32 idx;
304 int fifo_reg;
305 u32 ep_csr;
306
307 idx = ep->bEndpointAddress & 0x7F;
308 switch (idx) {
309 default:
310 idx = 0;
311 fallthrough;
312 case 0:
313 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
314 break;
315 case 1:
316 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
317 break;
318 case 2:
319 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
320 break;
321 case 3:
322 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
323 break;
324 case 4:
325 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
326 break;
327 }
328
329 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
330
331
332 if (count != ep->ep.maxpacket)
333 is_last = 1;
334 else if (req->req.length != req->req.actual || req->req.zero)
335 is_last = 0;
336 else
337 is_last = 2;
338
339
340 if (idx == 0)
341 dprintk(DEBUG_NORMAL,
342 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
343 idx, count, req->req.actual, req->req.length,
344 is_last, req->req.zero);
345
346 if (is_last) {
347
348
349
350 if (idx == 0) {
351
352 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
353 & S3C2410_UDC_USBINT_RESET))
354 s3c2410_udc_set_ep0_de_in(base_addr);
355 ep->dev->ep0state = EP0_IDLE;
356 } else {
357 udc_write(idx, S3C2410_UDC_INDEX_REG);
358 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
359 udc_write(idx, S3C2410_UDC_INDEX_REG);
360 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
361 S3C2410_UDC_IN_CSR1_REG);
362 }
363
364 s3c2410_udc_done(ep, req, 0);
365 is_last = 1;
366 } else {
367 if (idx == 0) {
368
369 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
370 & S3C2410_UDC_USBINT_RESET))
371 s3c2410_udc_set_ep0_ipr(base_addr);
372 } else {
373 udc_write(idx, S3C2410_UDC_INDEX_REG);
374 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
375 udc_write(idx, S3C2410_UDC_INDEX_REG);
376 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
377 S3C2410_UDC_IN_CSR1_REG);
378 }
379 }
380
381 return is_last;
382}
383
384static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
385 struct s3c2410_request *req, unsigned avail)
386{
387 unsigned len;
388
389 len = min(req->req.length - req->req.actual, avail);
390 req->req.actual += len;
391
392 readsb(fifo + base_addr, buf, len);
393 return len;
394}
395
396
397
398
399static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
400 struct s3c2410_request *req)
401{
402 u8 *buf;
403 u32 ep_csr;
404 unsigned bufferspace;
405 int is_last = 1;
406 unsigned avail;
407 int fifo_count = 0;
408 u32 idx;
409 int fifo_reg;
410
411 idx = ep->bEndpointAddress & 0x7F;
412
413 switch (idx) {
414 default:
415 idx = 0;
416 fallthrough;
417 case 0:
418 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
419 break;
420 case 1:
421 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
422 break;
423 case 2:
424 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
425 break;
426 case 3:
427 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
428 break;
429 case 4:
430 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
431 break;
432 }
433
434 if (!req->req.length)
435 return 1;
436
437 buf = req->req.buf + req->req.actual;
438 bufferspace = req->req.length - req->req.actual;
439 if (!bufferspace) {
440 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
441 return -1;
442 }
443
444 udc_write(idx, S3C2410_UDC_INDEX_REG);
445
446 fifo_count = s3c2410_udc_fifo_count_out();
447 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
448
449 if (fifo_count > ep->ep.maxpacket)
450 avail = ep->ep.maxpacket;
451 else
452 avail = fifo_count;
453
454 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
455
456
457
458
459 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
460 is_last = 1;
461
462 if (fifo_count != avail)
463 req->req.status = -EOVERFLOW;
464 } else {
465 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
466 }
467
468 udc_write(idx, S3C2410_UDC_INDEX_REG);
469 fifo_count = s3c2410_udc_fifo_count_out();
470
471
472 if (idx == 0)
473 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
474 __func__, fifo_count, is_last);
475
476 if (is_last) {
477 if (idx == 0) {
478 s3c2410_udc_set_ep0_de_out(base_addr);
479 ep->dev->ep0state = EP0_IDLE;
480 } else {
481 udc_write(idx, S3C2410_UDC_INDEX_REG);
482 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
483 udc_write(idx, S3C2410_UDC_INDEX_REG);
484 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
485 S3C2410_UDC_OUT_CSR1_REG);
486 }
487
488 s3c2410_udc_done(ep, req, 0);
489 } else {
490 if (idx == 0) {
491 s3c2410_udc_clear_ep0_opr(base_addr);
492 } else {
493 udc_write(idx, S3C2410_UDC_INDEX_REG);
494 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
495 udc_write(idx, S3C2410_UDC_INDEX_REG);
496 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
497 S3C2410_UDC_OUT_CSR1_REG);
498 }
499 }
500
501 return is_last;
502}
503
504static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
505{
506 unsigned char *outbuf = (unsigned char *)crq;
507 int bytes_read = 0;
508
509 udc_write(0, S3C2410_UDC_INDEX_REG);
510
511 bytes_read = s3c2410_udc_fifo_count_out();
512
513 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
514
515 if (bytes_read > sizeof(struct usb_ctrlrequest))
516 bytes_read = sizeof(struct usb_ctrlrequest);
517
518 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
519
520 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
521 bytes_read, crq->bRequest, crq->bRequestType,
522 crq->wValue, crq->wIndex, crq->wLength);
523
524 return bytes_read;
525}
526
527static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
528 struct usb_ctrlrequest *crq)
529{
530 u16 status = 0;
531 u8 ep_num = crq->wIndex & 0x7F;
532 u8 is_in = crq->wIndex & USB_DIR_IN;
533
534 switch (crq->bRequestType & USB_RECIP_MASK) {
535 case USB_RECIP_INTERFACE:
536 break;
537
538 case USB_RECIP_DEVICE:
539 status = dev->devstatus;
540 break;
541
542 case USB_RECIP_ENDPOINT:
543 if (ep_num > 4 || crq->wLength > 2)
544 return 1;
545
546 if (ep_num == 0) {
547 udc_write(0, S3C2410_UDC_INDEX_REG);
548 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
549 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
550 } else {
551 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
552 if (is_in) {
553 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
554 status = status & S3C2410_UDC_ICSR1_SENDSTL;
555 } else {
556 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
557 status = status & S3C2410_UDC_OCSR1_SENDSTL;
558 }
559 }
560
561 status = status ? 1 : 0;
562 break;
563
564 default:
565 return 1;
566 }
567
568
569 udelay(5);
570 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
571 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
572 s3c2410_udc_set_ep0_de_in(base_addr);
573
574 return 0;
575}
576
577static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
578
579static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
580 struct s3c2410_ep *ep,
581 struct usb_ctrlrequest *crq,
582 u32 ep0csr)
583{
584 int len, ret, tmp;
585
586
587 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
588 return;
589
590 s3c2410_udc_nuke(dev, ep, -EPROTO);
591
592 len = s3c2410_udc_read_fifo_crq(crq);
593 if (len != sizeof(*crq)) {
594 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
595 " wanted %d bytes got %d. Stalling out...\n",
596 sizeof(*crq), len);
597 s3c2410_udc_set_ep0_ss(base_addr);
598 return;
599 }
600
601 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
602 crq->bRequest, crq->bRequestType, crq->wLength);
603
604
605 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
606 == USB_TYPE_STANDARD;
607 dev->req_config = 0;
608 dev->req_pending = 1;
609
610 switch (crq->bRequest) {
611 case USB_REQ_SET_CONFIGURATION:
612 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
613
614 if (crq->bRequestType == USB_RECIP_DEVICE) {
615 dev->req_config = 1;
616 s3c2410_udc_set_ep0_de_out(base_addr);
617 }
618 break;
619
620 case USB_REQ_SET_INTERFACE:
621 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
622
623 if (crq->bRequestType == USB_RECIP_INTERFACE) {
624 dev->req_config = 1;
625 s3c2410_udc_set_ep0_de_out(base_addr);
626 }
627 break;
628
629 case USB_REQ_SET_ADDRESS:
630 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
631
632 if (crq->bRequestType == USB_RECIP_DEVICE) {
633 tmp = crq->wValue & 0x7F;
634 dev->address = tmp;
635 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
636 S3C2410_UDC_FUNC_ADDR_REG);
637 s3c2410_udc_set_ep0_de_out(base_addr);
638 return;
639 }
640 break;
641
642 case USB_REQ_GET_STATUS:
643 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
644 s3c2410_udc_clear_ep0_opr(base_addr);
645
646 if (dev->req_std) {
647 if (!s3c2410_udc_get_status(dev, crq))
648 return;
649 }
650 break;
651
652 case USB_REQ_CLEAR_FEATURE:
653 s3c2410_udc_clear_ep0_opr(base_addr);
654
655 if (crq->bRequestType != USB_RECIP_ENDPOINT)
656 break;
657
658 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
659 break;
660
661 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
662 s3c2410_udc_set_ep0_de_out(base_addr);
663 return;
664
665 case USB_REQ_SET_FEATURE:
666 s3c2410_udc_clear_ep0_opr(base_addr);
667
668 if (crq->bRequestType != USB_RECIP_ENDPOINT)
669 break;
670
671 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
672 break;
673
674 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
675 s3c2410_udc_set_ep0_de_out(base_addr);
676 return;
677
678 default:
679 s3c2410_udc_clear_ep0_opr(base_addr);
680 break;
681 }
682
683 if (crq->bRequestType & USB_DIR_IN)
684 dev->ep0state = EP0_IN_DATA_PHASE;
685 else
686 dev->ep0state = EP0_OUT_DATA_PHASE;
687
688 if (!dev->driver)
689 return;
690
691
692 ret = dev->driver->setup(&dev->gadget, crq);
693 if (ret < 0) {
694 if (dev->req_config) {
695 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
696 crq->bRequest, ret);
697 return;
698 }
699
700 if (ret == -EOPNOTSUPP)
701 dprintk(DEBUG_NORMAL, "Operation not supported\n");
702 else
703 dprintk(DEBUG_NORMAL,
704 "dev->driver->setup failed. (%d)\n", ret);
705
706 udelay(5);
707 s3c2410_udc_set_ep0_ss(base_addr);
708 s3c2410_udc_set_ep0_de_out(base_addr);
709 dev->ep0state = EP0_IDLE;
710
711 } else if (dev->req_pending) {
712 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
713 dev->req_pending = 0;
714 }
715
716 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
717}
718
719static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
720{
721 u32 ep0csr;
722 struct s3c2410_ep *ep = &dev->ep[0];
723 struct s3c2410_request *req;
724 struct usb_ctrlrequest crq;
725
726 if (list_empty(&ep->queue))
727 req = NULL;
728 else
729 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
730
731
732
733
734 udc_write(0, S3C2410_UDC_INDEX_REG);
735 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
736
737 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
738 ep0csr, ep0states[dev->ep0state]);
739
740
741 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
742 s3c2410_udc_nuke(dev, ep, -EPIPE);
743 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
744 s3c2410_udc_clear_ep0_sst(base_addr);
745 dev->ep0state = EP0_IDLE;
746 return;
747 }
748
749
750 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
751 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
752 s3c2410_udc_nuke(dev, ep, 0);
753 s3c2410_udc_clear_ep0_se(base_addr);
754 dev->ep0state = EP0_IDLE;
755 }
756
757 switch (dev->ep0state) {
758 case EP0_IDLE:
759 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
760 break;
761
762 case EP0_IN_DATA_PHASE:
763 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
764 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
765 s3c2410_udc_write_fifo(ep, req);
766 break;
767
768 case EP0_OUT_DATA_PHASE:
769 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
770 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
771 s3c2410_udc_read_fifo(ep, req);
772 break;
773
774 case EP0_END_XFER:
775 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
776 dev->ep0state = EP0_IDLE;
777 break;
778
779 case EP0_STALL:
780 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
781 dev->ep0state = EP0_IDLE;
782 break;
783 }
784}
785
786
787
788
789
790static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
791{
792 struct s3c2410_request *req;
793 int is_in = ep->bEndpointAddress & USB_DIR_IN;
794 u32 ep_csr1;
795 u32 idx;
796
797 if (likely(!list_empty(&ep->queue)))
798 req = list_entry(ep->queue.next,
799 struct s3c2410_request, queue);
800 else
801 req = NULL;
802
803 idx = ep->bEndpointAddress & 0x7F;
804
805 if (is_in) {
806 udc_write(idx, S3C2410_UDC_INDEX_REG);
807 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
808 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
809 idx, ep_csr1, req ? 1 : 0);
810
811 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
812 dprintk(DEBUG_VERBOSE, "st\n");
813 udc_write(idx, S3C2410_UDC_INDEX_REG);
814 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
815 S3C2410_UDC_IN_CSR1_REG);
816 return;
817 }
818
819 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
820 s3c2410_udc_write_fifo(ep, req);
821 } else {
822 udc_write(idx, S3C2410_UDC_INDEX_REG);
823 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
824 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
825
826 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
827 udc_write(idx, S3C2410_UDC_INDEX_REG);
828 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
829 S3C2410_UDC_OUT_CSR1_REG);
830 return;
831 }
832
833 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
834 s3c2410_udc_read_fifo(ep, req);
835 }
836}
837
838#include <mach/regs-irq.h>
839
840
841
842
843static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
844{
845 struct s3c2410_udc *dev = _dev;
846 int usb_status;
847 int usbd_status;
848 int pwr_reg;
849 int ep0csr;
850 int i;
851 u32 idx, idx2;
852 unsigned long flags;
853
854 spin_lock_irqsave(&dev->lock, flags);
855
856
857 if (!dev->driver) {
858
859 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
860 S3C2410_UDC_USB_INT_REG);
861 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
862 S3C2410_UDC_EP_INT_REG);
863 }
864
865
866 idx = udc_read(S3C2410_UDC_INDEX_REG);
867
868
869 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
870 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
871 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
872
873 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
874 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
875
876 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
877 usb_status, usbd_status, pwr_reg, ep0csr);
878
879
880
881
882
883
884
885
886 if (usb_status & S3C2410_UDC_USBINT_RESET) {
887
888
889
890
891 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
892 ep0csr, pwr_reg);
893
894 dev->gadget.speed = USB_SPEED_UNKNOWN;
895 udc_write(0x00, S3C2410_UDC_INDEX_REG);
896 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
897 S3C2410_UDC_MAXP_REG);
898 dev->address = 0;
899
900 dev->ep0state = EP0_IDLE;
901 dev->gadget.speed = USB_SPEED_FULL;
902
903
904 udc_write(S3C2410_UDC_USBINT_RESET,
905 S3C2410_UDC_USB_INT_REG);
906
907 udc_write(idx, S3C2410_UDC_INDEX_REG);
908 spin_unlock_irqrestore(&dev->lock, flags);
909 return IRQ_HANDLED;
910 }
911
912
913 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
914 dprintk(DEBUG_NORMAL, "USB resume\n");
915
916
917 udc_write(S3C2410_UDC_USBINT_RESUME,
918 S3C2410_UDC_USB_INT_REG);
919
920 if (dev->gadget.speed != USB_SPEED_UNKNOWN
921 && dev->driver
922 && dev->driver->resume)
923 dev->driver->resume(&dev->gadget);
924 }
925
926
927 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
928 dprintk(DEBUG_NORMAL, "USB suspend\n");
929
930
931 udc_write(S3C2410_UDC_USBINT_SUSPEND,
932 S3C2410_UDC_USB_INT_REG);
933
934 if (dev->gadget.speed != USB_SPEED_UNKNOWN
935 && dev->driver
936 && dev->driver->suspend)
937 dev->driver->suspend(&dev->gadget);
938
939 dev->ep0state = EP0_IDLE;
940 }
941
942
943
944
945
946
947 if (usbd_status & S3C2410_UDC_INT_EP0) {
948 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
949
950 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
951 s3c2410_udc_handle_ep0(dev);
952 }
953
954
955 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
956 u32 tmp = 1 << i;
957 if (usbd_status & tmp) {
958 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
959
960
961 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
962 s3c2410_udc_handle_ep(&dev->ep[i]);
963 }
964 }
965
966
967 if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
968 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
969 idx2 = udc_read(S3C2410_UDC_INDEX_REG);
970 udc_write(i, S3C2410_UDC_INDEX_REG);
971
972 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
973 s3c2410_udc_handle_ep(&dev->ep[i]);
974
975
976 udc_write(idx2, S3C2410_UDC_INDEX_REG);
977 }
978 }
979
980 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
981
982
983 udc_write(idx, S3C2410_UDC_INDEX_REG);
984
985 spin_unlock_irqrestore(&dev->lock, flags);
986
987 return IRQ_HANDLED;
988}
989
990
991static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
992{
993 return container_of(ep, struct s3c2410_ep, ep);
994}
995
996static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
997{
998 return container_of(gadget, struct s3c2410_udc, gadget);
999}
1000
1001static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1002{
1003 return container_of(req, struct s3c2410_request, req);
1004}
1005
1006
1007
1008
1009static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1010 const struct usb_endpoint_descriptor *desc)
1011{
1012 struct s3c2410_udc *dev;
1013 struct s3c2410_ep *ep;
1014 u32 max, tmp;
1015 unsigned long flags;
1016 u32 csr1, csr2;
1017 u32 int_en_reg;
1018
1019 ep = to_s3c2410_ep(_ep);
1020
1021 if (!_ep || !desc
1022 || _ep->name == ep0name
1023 || desc->bDescriptorType != USB_DT_ENDPOINT)
1024 return -EINVAL;
1025
1026 dev = ep->dev;
1027 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1028 return -ESHUTDOWN;
1029
1030 max = usb_endpoint_maxp(desc);
1031
1032 local_irq_save(flags);
1033 _ep->maxpacket = max;
1034 ep->ep.desc = desc;
1035 ep->halted = 0;
1036 ep->bEndpointAddress = desc->bEndpointAddress;
1037
1038
1039 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1040 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1041
1042
1043 if (desc->bEndpointAddress & USB_DIR_IN) {
1044 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1045 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1046
1047 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1048 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1049 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1050 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1051 } else {
1052
1053 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1054 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1055
1056 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1057 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1058 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1059 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1060
1061 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1062 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1063
1064 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1065 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1066 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1067 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1068 }
1069
1070
1071 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1072 udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1073
1074
1075 tmp = desc->bEndpointAddress;
1076 dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1077 _ep->name, ep->num, tmp,
1078 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1079
1080 local_irq_restore(flags);
1081 s3c2410_udc_set_halt(_ep, 0);
1082
1083 return 0;
1084}
1085
1086
1087
1088
1089static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1090{
1091 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1092 unsigned long flags;
1093 u32 int_en_reg;
1094
1095 if (!_ep || !ep->ep.desc) {
1096 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1097 _ep ? ep->ep.name : NULL);
1098 return -EINVAL;
1099 }
1100
1101 local_irq_save(flags);
1102
1103 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1104
1105 ep->ep.desc = NULL;
1106 ep->halted = 1;
1107
1108 s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1109
1110
1111 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1112 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1113
1114 local_irq_restore(flags);
1115
1116 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1117
1118 return 0;
1119}
1120
1121
1122
1123
1124static struct usb_request *
1125s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1126{
1127 struct s3c2410_request *req;
1128
1129 dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1130
1131 if (!_ep)
1132 return NULL;
1133
1134 req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1135 if (!req)
1136 return NULL;
1137
1138 INIT_LIST_HEAD(&req->queue);
1139 return &req->req;
1140}
1141
1142
1143
1144
1145static void
1146s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1147{
1148 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1149 struct s3c2410_request *req = to_s3c2410_req(_req);
1150
1151 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1152
1153 if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1154 return;
1155
1156 WARN_ON(!list_empty(&req->queue));
1157 kfree(req);
1158}
1159
1160
1161
1162
1163static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1164 gfp_t gfp_flags)
1165{
1166 struct s3c2410_request *req = to_s3c2410_req(_req);
1167 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1168 struct s3c2410_udc *dev;
1169 u32 ep_csr = 0;
1170 int fifo_count = 0;
1171 unsigned long flags;
1172
1173 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1174 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1175 return -EINVAL;
1176 }
1177
1178 dev = ep->dev;
1179 if (unlikely(!dev->driver
1180 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1181 return -ESHUTDOWN;
1182 }
1183
1184 local_irq_save(flags);
1185
1186 if (unlikely(!_req || !_req->complete
1187 || !_req->buf || !list_empty(&req->queue))) {
1188 if (!_req)
1189 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1190 else {
1191 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1192 __func__, !_req->complete, !_req->buf,
1193 !list_empty(&req->queue));
1194 }
1195
1196 local_irq_restore(flags);
1197 return -EINVAL;
1198 }
1199
1200 _req->status = -EINPROGRESS;
1201 _req->actual = 0;
1202
1203 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1204 __func__, ep->bEndpointAddress, _req->length);
1205
1206 if (ep->bEndpointAddress) {
1207 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1208
1209 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1210 ? S3C2410_UDC_IN_CSR1_REG
1211 : S3C2410_UDC_OUT_CSR1_REG);
1212 fifo_count = s3c2410_udc_fifo_count_out();
1213 } else {
1214 udc_write(0, S3C2410_UDC_INDEX_REG);
1215 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1216 fifo_count = s3c2410_udc_fifo_count_out();
1217 }
1218
1219
1220 if (list_empty(&ep->queue) && !ep->halted) {
1221 if (ep->bEndpointAddress == 0 ) {
1222 switch (dev->ep0state) {
1223 case EP0_IN_DATA_PHASE:
1224 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1225 && s3c2410_udc_write_fifo(ep,
1226 req)) {
1227 dev->ep0state = EP0_IDLE;
1228 req = NULL;
1229 }
1230 break;
1231
1232 case EP0_OUT_DATA_PHASE:
1233 if ((!_req->length)
1234 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1235 && s3c2410_udc_read_fifo(ep,
1236 req))) {
1237 dev->ep0state = EP0_IDLE;
1238 req = NULL;
1239 }
1240 break;
1241
1242 default:
1243 local_irq_restore(flags);
1244 return -EL2HLT;
1245 }
1246 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1247 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1248 && s3c2410_udc_write_fifo(ep, req)) {
1249 req = NULL;
1250 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1251 && fifo_count
1252 && s3c2410_udc_read_fifo(ep, req)) {
1253 req = NULL;
1254 }
1255 }
1256
1257
1258 if (likely(req))
1259 list_add_tail(&req->queue, &ep->queue);
1260
1261 local_irq_restore(flags);
1262
1263 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1264 return 0;
1265}
1266
1267
1268
1269
1270static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1271{
1272 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1273 struct s3c2410_udc *udc;
1274 int retval = -EINVAL;
1275 unsigned long flags;
1276 struct s3c2410_request *req = NULL;
1277
1278 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1279
1280 if (!the_controller->driver)
1281 return -ESHUTDOWN;
1282
1283 if (!_ep || !_req)
1284 return retval;
1285
1286 udc = to_s3c2410_udc(ep->gadget);
1287
1288 local_irq_save(flags);
1289
1290 list_for_each_entry(req, &ep->queue, queue) {
1291 if (&req->req == _req) {
1292 list_del_init(&req->queue);
1293 _req->status = -ECONNRESET;
1294 retval = 0;
1295 break;
1296 }
1297 }
1298
1299 if (retval == 0) {
1300 dprintk(DEBUG_VERBOSE,
1301 "dequeued req %p from %s, len %d buf %p\n",
1302 req, _ep->name, _req->length, _req->buf);
1303
1304 s3c2410_udc_done(ep, req, -ECONNRESET);
1305 }
1306
1307 local_irq_restore(flags);
1308 return retval;
1309}
1310
1311
1312
1313
1314static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1315{
1316 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1317 u32 ep_csr = 0;
1318 unsigned long flags;
1319 u32 idx;
1320
1321 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1322 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1323 return -EINVAL;
1324 }
1325
1326 local_irq_save(flags);
1327
1328 idx = ep->bEndpointAddress & 0x7F;
1329
1330 if (idx == 0) {
1331 s3c2410_udc_set_ep0_ss(base_addr);
1332 s3c2410_udc_set_ep0_de_out(base_addr);
1333 } else {
1334 udc_write(idx, S3C2410_UDC_INDEX_REG);
1335 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1336 ? S3C2410_UDC_IN_CSR1_REG
1337 : S3C2410_UDC_OUT_CSR1_REG);
1338
1339 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1340 if (value)
1341 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1342 S3C2410_UDC_IN_CSR1_REG);
1343 else {
1344 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1345 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1346 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1347 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1348 }
1349 } else {
1350 if (value)
1351 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1352 S3C2410_UDC_OUT_CSR1_REG);
1353 else {
1354 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1355 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1356 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1357 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1358 }
1359 }
1360 }
1361
1362 ep->halted = value ? 1 : 0;
1363 local_irq_restore(flags);
1364
1365 return 0;
1366}
1367
1368static const struct usb_ep_ops s3c2410_ep_ops = {
1369 .enable = s3c2410_udc_ep_enable,
1370 .disable = s3c2410_udc_ep_disable,
1371
1372 .alloc_request = s3c2410_udc_alloc_request,
1373 .free_request = s3c2410_udc_free_request,
1374
1375 .queue = s3c2410_udc_queue,
1376 .dequeue = s3c2410_udc_dequeue,
1377
1378 .set_halt = s3c2410_udc_set_halt,
1379};
1380
1381
1382
1383
1384
1385
1386static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1387{
1388 int tmp;
1389
1390 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1391
1392 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1393 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1394 return tmp;
1395}
1396
1397
1398
1399
1400static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1401{
1402 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1403 return 0;
1404}
1405
1406
1407
1408
1409static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1410{
1411 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1412
1413 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1414
1415 gadget->is_selfpowered = (value != 0);
1416 if (value)
1417 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1418 else
1419 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1420
1421 return 0;
1422}
1423
1424static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1425static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1426
1427static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1428{
1429 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1430
1431 if (udc_info && (udc_info->udc_command ||
1432 gpio_is_valid(udc_info->pullup_pin))) {
1433
1434 if (is_on)
1435 s3c2410_udc_enable(udc);
1436 else {
1437 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1438 if (udc->driver && udc->driver->disconnect)
1439 udc->driver->disconnect(&udc->gadget);
1440
1441 }
1442 s3c2410_udc_disable(udc);
1443 }
1444 } else {
1445 return -EOPNOTSUPP;
1446 }
1447
1448 return 0;
1449}
1450
1451static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1452{
1453 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1454
1455 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1456
1457 udc->vbus = (is_active != 0);
1458 s3c2410_udc_set_pullup(udc, is_active);
1459 return 0;
1460}
1461
1462static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1463{
1464 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1465
1466 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1467
1468 s3c2410_udc_set_pullup(udc, is_on);
1469 return 0;
1470}
1471
1472static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1473{
1474 struct s3c2410_udc *dev = _dev;
1475 unsigned int value;
1476
1477 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1478
1479 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1480 if (udc_info->vbus_pin_inverted)
1481 value = !value;
1482
1483 if (value != dev->vbus)
1484 s3c2410_udc_vbus_session(&dev->gadget, value);
1485
1486 return IRQ_HANDLED;
1487}
1488
1489static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1490{
1491 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1492
1493 if (udc_info && udc_info->vbus_draw) {
1494 udc_info->vbus_draw(ma);
1495 return 0;
1496 }
1497
1498 return -ENOTSUPP;
1499}
1500
1501static int s3c2410_udc_start(struct usb_gadget *g,
1502 struct usb_gadget_driver *driver);
1503static int s3c2410_udc_stop(struct usb_gadget *g);
1504
1505static const struct usb_gadget_ops s3c2410_ops = {
1506 .get_frame = s3c2410_udc_get_frame,
1507 .wakeup = s3c2410_udc_wakeup,
1508 .set_selfpowered = s3c2410_udc_set_selfpowered,
1509 .pullup = s3c2410_udc_pullup,
1510 .vbus_session = s3c2410_udc_vbus_session,
1511 .vbus_draw = s3c2410_vbus_draw,
1512 .udc_start = s3c2410_udc_start,
1513 .udc_stop = s3c2410_udc_stop,
1514};
1515
1516static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1517{
1518 if (!udc_info)
1519 return;
1520
1521 if (udc_info->udc_command) {
1522 udc_info->udc_command(cmd);
1523 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1524 int value;
1525
1526 switch (cmd) {
1527 case S3C2410_UDC_P_ENABLE:
1528 value = 1;
1529 break;
1530 case S3C2410_UDC_P_DISABLE:
1531 value = 0;
1532 break;
1533 default:
1534 return;
1535 }
1536 value ^= udc_info->pullup_pin_inverted;
1537
1538 gpio_set_value(udc_info->pullup_pin, value);
1539 }
1540}
1541
1542
1543
1544
1545
1546static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1547{
1548 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1549
1550
1551 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1552 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1553
1554
1555 udc_write(S3C2410_UDC_USBINT_RESET
1556 | S3C2410_UDC_USBINT_RESUME
1557 | S3C2410_UDC_USBINT_SUSPEND,
1558 S3C2410_UDC_USB_INT_REG);
1559
1560 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1561
1562
1563 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1564
1565
1566 dev->gadget.speed = USB_SPEED_UNKNOWN;
1567}
1568
1569
1570
1571
1572static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1573{
1574 u32 i;
1575
1576
1577 INIT_LIST_HEAD(&dev->gadget.ep_list);
1578 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1579 dev->ep0state = EP0_IDLE;
1580
1581 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1582 struct s3c2410_ep *ep = &dev->ep[i];
1583
1584 if (i != 0)
1585 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1586
1587 ep->dev = dev;
1588 ep->ep.desc = NULL;
1589 ep->halted = 0;
1590 INIT_LIST_HEAD(&ep->queue);
1591 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1592 }
1593}
1594
1595
1596
1597
1598static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1599{
1600 int i;
1601
1602 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1603
1604
1605 dev->gadget.speed = USB_SPEED_FULL;
1606
1607
1608 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1609 udc_write(i, S3C2410_UDC_INDEX_REG);
1610 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1611 S3C2410_UDC_MAXP_REG);
1612 }
1613
1614
1615 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1616
1617
1618 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1619 S3C2410_UDC_USB_INT_EN_REG);
1620
1621
1622 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1623
1624
1625 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1626}
1627
1628static int s3c2410_udc_start(struct usb_gadget *g,
1629 struct usb_gadget_driver *driver)
1630{
1631 struct s3c2410_udc *udc = to_s3c2410(g);
1632
1633 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1634
1635
1636 udc->driver = driver;
1637
1638
1639 s3c2410_udc_enable(udc);
1640
1641 return 0;
1642}
1643
1644static int s3c2410_udc_stop(struct usb_gadget *g)
1645{
1646 struct s3c2410_udc *udc = to_s3c2410(g);
1647
1648 udc->driver = NULL;
1649
1650
1651 s3c2410_udc_disable(udc);
1652
1653 return 0;
1654}
1655
1656
1657static struct s3c2410_udc memory = {
1658 .gadget = {
1659 .ops = &s3c2410_ops,
1660 .ep0 = &memory.ep[0].ep,
1661 .name = gadget_name,
1662 .dev = {
1663 .init_name = "gadget",
1664 },
1665 },
1666
1667
1668 .ep[0] = {
1669 .num = 0,
1670 .ep = {
1671 .name = ep0name,
1672 .ops = &s3c2410_ep_ops,
1673 .maxpacket = EP0_FIFO_SIZE,
1674 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1675 USB_EP_CAPS_DIR_ALL),
1676 },
1677 .dev = &memory,
1678 },
1679
1680
1681 .ep[1] = {
1682 .num = 1,
1683 .ep = {
1684 .name = "ep1-bulk",
1685 .ops = &s3c2410_ep_ops,
1686 .maxpacket = EP_FIFO_SIZE,
1687 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1688 USB_EP_CAPS_DIR_ALL),
1689 },
1690 .dev = &memory,
1691 .fifo_size = EP_FIFO_SIZE,
1692 .bEndpointAddress = 1,
1693 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1694 },
1695 .ep[2] = {
1696 .num = 2,
1697 .ep = {
1698 .name = "ep2-bulk",
1699 .ops = &s3c2410_ep_ops,
1700 .maxpacket = EP_FIFO_SIZE,
1701 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1702 USB_EP_CAPS_DIR_ALL),
1703 },
1704 .dev = &memory,
1705 .fifo_size = EP_FIFO_SIZE,
1706 .bEndpointAddress = 2,
1707 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1708 },
1709 .ep[3] = {
1710 .num = 3,
1711 .ep = {
1712 .name = "ep3-bulk",
1713 .ops = &s3c2410_ep_ops,
1714 .maxpacket = EP_FIFO_SIZE,
1715 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1716 USB_EP_CAPS_DIR_ALL),
1717 },
1718 .dev = &memory,
1719 .fifo_size = EP_FIFO_SIZE,
1720 .bEndpointAddress = 3,
1721 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1722 },
1723 .ep[4] = {
1724 .num = 4,
1725 .ep = {
1726 .name = "ep4-bulk",
1727 .ops = &s3c2410_ep_ops,
1728 .maxpacket = EP_FIFO_SIZE,
1729 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1730 USB_EP_CAPS_DIR_ALL),
1731 },
1732 .dev = &memory,
1733 .fifo_size = EP_FIFO_SIZE,
1734 .bEndpointAddress = 4,
1735 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1736 }
1737
1738};
1739
1740
1741
1742
1743static int s3c2410_udc_probe(struct platform_device *pdev)
1744{
1745 struct s3c2410_udc *udc = &memory;
1746 struct device *dev = &pdev->dev;
1747 int retval;
1748 int irq;
1749
1750 dev_dbg(dev, "%s()\n", __func__);
1751
1752 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1753 if (IS_ERR(usb_bus_clock)) {
1754 dev_err(dev, "failed to get usb bus clock source\n");
1755 return PTR_ERR(usb_bus_clock);
1756 }
1757
1758 clk_prepare_enable(usb_bus_clock);
1759
1760 udc_clock = clk_get(NULL, "usb-device");
1761 if (IS_ERR(udc_clock)) {
1762 dev_err(dev, "failed to get udc clock source\n");
1763 return PTR_ERR(udc_clock);
1764 }
1765
1766 clk_prepare_enable(udc_clock);
1767
1768 mdelay(10);
1769
1770 dev_dbg(dev, "got and enabled clocks\n");
1771
1772 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1773 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1774 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1775 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1776 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1777 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1778 }
1779
1780 spin_lock_init(&udc->lock);
1781 udc_info = dev_get_platdata(&pdev->dev);
1782
1783 rsrc_start = S3C2410_PA_USBDEV;
1784 rsrc_len = S3C24XX_SZ_USBDEV;
1785
1786 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1787 return -EBUSY;
1788
1789 base_addr = ioremap(rsrc_start, rsrc_len);
1790 if (!base_addr) {
1791 retval = -ENOMEM;
1792 goto err_mem;
1793 }
1794
1795 the_controller = udc;
1796 platform_set_drvdata(pdev, udc);
1797
1798 s3c2410_udc_disable(udc);
1799 s3c2410_udc_reinit(udc);
1800
1801
1802 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1803 0, gadget_name, udc);
1804
1805 if (retval != 0) {
1806 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1807 retval = -EBUSY;
1808 goto err_map;
1809 }
1810
1811 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1812
1813 if (udc_info && udc_info->vbus_pin > 0) {
1814 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1815 if (retval < 0) {
1816 dev_err(dev, "cannot claim vbus pin\n");
1817 goto err_int;
1818 }
1819
1820 irq = gpio_to_irq(udc_info->vbus_pin);
1821 if (irq < 0) {
1822 dev_err(dev, "no irq for gpio vbus pin\n");
1823 retval = irq;
1824 goto err_gpio_claim;
1825 }
1826
1827 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1828 IRQF_TRIGGER_RISING
1829 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1830 gadget_name, udc);
1831
1832 if (retval != 0) {
1833 dev_err(dev, "can't get vbus irq %d, err %d\n",
1834 irq, retval);
1835 retval = -EBUSY;
1836 goto err_gpio_claim;
1837 }
1838
1839 dev_dbg(dev, "got irq %i\n", irq);
1840 } else {
1841 udc->vbus = 1;
1842 }
1843
1844 if (udc_info && !udc_info->udc_command &&
1845 gpio_is_valid(udc_info->pullup_pin)) {
1846
1847 retval = gpio_request_one(udc_info->pullup_pin,
1848 udc_info->vbus_pin_inverted ?
1849 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1850 "udc pullup");
1851 if (retval)
1852 goto err_vbus_irq;
1853 }
1854
1855 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1856 if (retval)
1857 goto err_add_udc;
1858
1859 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1860 s3c2410_udc_debugfs_root, udc,
1861 &s3c2410_udc_debugfs_fops);
1862
1863 dev_dbg(dev, "probe ok\n");
1864
1865 return 0;
1866
1867err_add_udc:
1868 if (udc_info && !udc_info->udc_command &&
1869 gpio_is_valid(udc_info->pullup_pin))
1870 gpio_free(udc_info->pullup_pin);
1871err_vbus_irq:
1872 if (udc_info && udc_info->vbus_pin > 0)
1873 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1874err_gpio_claim:
1875 if (udc_info && udc_info->vbus_pin > 0)
1876 gpio_free(udc_info->vbus_pin);
1877err_int:
1878 free_irq(IRQ_USBD, udc);
1879err_map:
1880 iounmap(base_addr);
1881err_mem:
1882 release_mem_region(rsrc_start, rsrc_len);
1883
1884 return retval;
1885}
1886
1887
1888
1889
1890static int s3c2410_udc_remove(struct platform_device *pdev)
1891{
1892 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1893 unsigned int irq;
1894
1895 dev_dbg(&pdev->dev, "%s()\n", __func__);
1896
1897 if (udc->driver)
1898 return -EBUSY;
1899
1900 usb_del_gadget_udc(&udc->gadget);
1901 debugfs_remove(udc->regs_info);
1902
1903 if (udc_info && !udc_info->udc_command &&
1904 gpio_is_valid(udc_info->pullup_pin))
1905 gpio_free(udc_info->pullup_pin);
1906
1907 if (udc_info && udc_info->vbus_pin > 0) {
1908 irq = gpio_to_irq(udc_info->vbus_pin);
1909 free_irq(irq, udc);
1910 }
1911
1912 free_irq(IRQ_USBD, udc);
1913
1914 iounmap(base_addr);
1915 release_mem_region(rsrc_start, rsrc_len);
1916
1917 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1918 clk_disable_unprepare(udc_clock);
1919 clk_put(udc_clock);
1920 udc_clock = NULL;
1921 }
1922
1923 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1924 clk_disable_unprepare(usb_bus_clock);
1925 clk_put(usb_bus_clock);
1926 usb_bus_clock = NULL;
1927 }
1928
1929 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1930 return 0;
1931}
1932
1933#ifdef CONFIG_PM
1934static int
1935s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1936{
1937 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1938
1939 return 0;
1940}
1941
1942static int s3c2410_udc_resume(struct platform_device *pdev)
1943{
1944 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1945
1946 return 0;
1947}
1948#else
1949#define s3c2410_udc_suspend NULL
1950#define s3c2410_udc_resume NULL
1951#endif
1952
1953static const struct platform_device_id s3c_udc_ids[] = {
1954 { "s3c2410-usbgadget", },
1955 { "s3c2440-usbgadget", },
1956 { }
1957};
1958MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1959
1960static struct platform_driver udc_driver_24x0 = {
1961 .driver = {
1962 .name = "s3c24x0-usbgadget",
1963 },
1964 .probe = s3c2410_udc_probe,
1965 .remove = s3c2410_udc_remove,
1966 .suspend = s3c2410_udc_suspend,
1967 .resume = s3c2410_udc_resume,
1968 .id_table = s3c_udc_ids,
1969};
1970
1971static int __init udc_init(void)
1972{
1973 int retval;
1974
1975 dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
1976
1977 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name,
1978 usb_debug_root);
1979
1980 retval = platform_driver_register(&udc_driver_24x0);
1981 if (retval)
1982 goto err;
1983
1984 return 0;
1985
1986err:
1987 debugfs_remove(s3c2410_udc_debugfs_root);
1988 return retval;
1989}
1990
1991static void __exit udc_exit(void)
1992{
1993 platform_driver_unregister(&udc_driver_24x0);
1994 debugfs_remove_recursive(s3c2410_udc_debugfs_root);
1995}
1996
1997module_init(udc_init);
1998module_exit(udc_exit);
1999
2000MODULE_AUTHOR(DRIVER_AUTHOR);
2001MODULE_DESCRIPTION(DRIVER_DESC);
2002MODULE_LICENSE("GPL");
2003
