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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
255 if (&ep->queue == NULL)
256 return;
257
258 while (!list_empty(&ep->queue)) {
259 struct s3c2410_request *req;
260 req = list_entry(ep->queue.next, struct s3c2410_request,
261 queue);
262 s3c2410_udc_done(ep, req, status);
263 }
264}
265
266static inline int s3c2410_udc_fifo_count_out(void)
267{
268 int tmp;
269
270 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
271 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
272 return tmp;
273}
274
275
276
277
278static inline int s3c2410_udc_write_packet(int fifo,
279 struct s3c2410_request *req,
280 unsigned max)
281{
282 unsigned len = min(req->req.length - req->req.actual, max);
283 u8 *buf = req->req.buf + req->req.actual;
284
285 prefetch(buf);
286
287 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
288 req->req.actual, req->req.length, len, req->req.actual + len);
289
290 req->req.actual += len;
291
292 udelay(5);
293 writesb(base_addr + fifo, buf, len);
294 return len;
295}
296
297
298
299
300
301
302static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
303 struct s3c2410_request *req)
304{
305 unsigned count;
306 int is_last;
307 u32 idx;
308 int fifo_reg;
309 u32 ep_csr;
310
311 idx = ep->bEndpointAddress & 0x7F;
312 switch (idx) {
313 default:
314 idx = 0;
315 case 0:
316 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
317 break;
318 case 1:
319 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
320 break;
321 case 2:
322 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
323 break;
324 case 3:
325 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
326 break;
327 case 4:
328 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
329 break;
330 }
331
332 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
333
334
335 if (count != ep->ep.maxpacket)
336 is_last = 1;
337 else if (req->req.length != req->req.actual || req->req.zero)
338 is_last = 0;
339 else
340 is_last = 2;
341
342
343 if (idx == 0)
344 dprintk(DEBUG_NORMAL,
345 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
346 idx, count, req->req.actual, req->req.length,
347 is_last, req->req.zero);
348
349 if (is_last) {
350
351
352
353 if (idx == 0) {
354
355 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
356 & S3C2410_UDC_USBINT_RESET))
357 s3c2410_udc_set_ep0_de_in(base_addr);
358 ep->dev->ep0state = EP0_IDLE;
359 } else {
360 udc_write(idx, S3C2410_UDC_INDEX_REG);
361 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
362 udc_write(idx, S3C2410_UDC_INDEX_REG);
363 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
364 S3C2410_UDC_IN_CSR1_REG);
365 }
366
367 s3c2410_udc_done(ep, req, 0);
368 is_last = 1;
369 } else {
370 if (idx == 0) {
371
372 if (!(udc_read(S3C2410_UDC_USB_INT_REG)
373 & S3C2410_UDC_USBINT_RESET))
374 s3c2410_udc_set_ep0_ipr(base_addr);
375 } else {
376 udc_write(idx, S3C2410_UDC_INDEX_REG);
377 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
378 udc_write(idx, S3C2410_UDC_INDEX_REG);
379 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
380 S3C2410_UDC_IN_CSR1_REG);
381 }
382 }
383
384 return is_last;
385}
386
387static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
388 struct s3c2410_request *req, unsigned avail)
389{
390 unsigned len;
391
392 len = min(req->req.length - req->req.actual, avail);
393 req->req.actual += len;
394
395 readsb(fifo + base_addr, buf, len);
396 return len;
397}
398
399
400
401
402static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
403 struct s3c2410_request *req)
404{
405 u8 *buf;
406 u32 ep_csr;
407 unsigned bufferspace;
408 int is_last = 1;
409 unsigned avail;
410 int fifo_count = 0;
411 u32 idx;
412 int fifo_reg;
413
414 idx = ep->bEndpointAddress & 0x7F;
415
416 switch (idx) {
417 default:
418 idx = 0;
419 case 0:
420 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
421 break;
422 case 1:
423 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
424 break;
425 case 2:
426 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
427 break;
428 case 3:
429 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
430 break;
431 case 4:
432 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
433 break;
434 }
435
436 if (!req->req.length)
437 return 1;
438
439 buf = req->req.buf + req->req.actual;
440 bufferspace = req->req.length - req->req.actual;
441 if (!bufferspace) {
442 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
443 return -1;
444 }
445
446 udc_write(idx, S3C2410_UDC_INDEX_REG);
447
448 fifo_count = s3c2410_udc_fifo_count_out();
449 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
450
451 if (fifo_count > ep->ep.maxpacket)
452 avail = ep->ep.maxpacket;
453 else
454 avail = fifo_count;
455
456 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
457
458
459
460
461 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
462 is_last = 1;
463
464 if (fifo_count != avail)
465 req->req.status = -EOVERFLOW;
466 } else {
467 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
468 }
469
470 udc_write(idx, S3C2410_UDC_INDEX_REG);
471 fifo_count = s3c2410_udc_fifo_count_out();
472
473
474 if (idx == 0)
475 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
476 __func__, fifo_count, is_last);
477
478 if (is_last) {
479 if (idx == 0) {
480 s3c2410_udc_set_ep0_de_out(base_addr);
481 ep->dev->ep0state = EP0_IDLE;
482 } else {
483 udc_write(idx, S3C2410_UDC_INDEX_REG);
484 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
485 udc_write(idx, S3C2410_UDC_INDEX_REG);
486 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
487 S3C2410_UDC_OUT_CSR1_REG);
488 }
489
490 s3c2410_udc_done(ep, req, 0);
491 } else {
492 if (idx == 0) {
493 s3c2410_udc_clear_ep0_opr(base_addr);
494 } else {
495 udc_write(idx, S3C2410_UDC_INDEX_REG);
496 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
497 udc_write(idx, S3C2410_UDC_INDEX_REG);
498 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
499 S3C2410_UDC_OUT_CSR1_REG);
500 }
501 }
502
503 return is_last;
504}
505
506static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
507{
508 unsigned char *outbuf = (unsigned char *)crq;
509 int bytes_read = 0;
510
511 udc_write(0, S3C2410_UDC_INDEX_REG);
512
513 bytes_read = s3c2410_udc_fifo_count_out();
514
515 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
516
517 if (bytes_read > sizeof(struct usb_ctrlrequest))
518 bytes_read = sizeof(struct usb_ctrlrequest);
519
520 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
521
522 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
523 bytes_read, crq->bRequest, crq->bRequestType,
524 crq->wValue, crq->wIndex, crq->wLength);
525
526 return bytes_read;
527}
528
529static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
530 struct usb_ctrlrequest *crq)
531{
532 u16 status = 0;
533 u8 ep_num = crq->wIndex & 0x7F;
534 u8 is_in = crq->wIndex & USB_DIR_IN;
535
536 switch (crq->bRequestType & USB_RECIP_MASK) {
537 case USB_RECIP_INTERFACE:
538 break;
539
540 case USB_RECIP_DEVICE:
541 status = dev->devstatus;
542 break;
543
544 case USB_RECIP_ENDPOINT:
545 if (ep_num > 4 || crq->wLength > 2)
546 return 1;
547
548 if (ep_num == 0) {
549 udc_write(0, S3C2410_UDC_INDEX_REG);
550 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
551 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
552 } else {
553 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
554 if (is_in) {
555 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
556 status = status & S3C2410_UDC_ICSR1_SENDSTL;
557 } else {
558 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
559 status = status & S3C2410_UDC_OCSR1_SENDSTL;
560 }
561 }
562
563 status = status ? 1 : 0;
564 break;
565
566 default:
567 return 1;
568 }
569
570
571 udelay(5);
572 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
573 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
574 s3c2410_udc_set_ep0_de_in(base_addr);
575
576 return 0;
577}
578
579static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
580
581static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
582 struct s3c2410_ep *ep,
583 struct usb_ctrlrequest *crq,
584 u32 ep0csr)
585{
586 int len, ret, tmp;
587
588
589 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
590 return;
591
592 s3c2410_udc_nuke(dev, ep, -EPROTO);
593
594 len = s3c2410_udc_read_fifo_crq(crq);
595 if (len != sizeof(*crq)) {
596 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
597 " wanted %d bytes got %d. Stalling out...\n",
598 sizeof(*crq), len);
599 s3c2410_udc_set_ep0_ss(base_addr);
600 return;
601 }
602
603 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
604 crq->bRequest, crq->bRequestType, crq->wLength);
605
606
607 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
608 == USB_TYPE_STANDARD;
609 dev->req_config = 0;
610 dev->req_pending = 1;
611
612 switch (crq->bRequest) {
613 case USB_REQ_SET_CONFIGURATION:
614 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
615
616 if (crq->bRequestType == USB_RECIP_DEVICE) {
617 dev->req_config = 1;
618 s3c2410_udc_set_ep0_de_out(base_addr);
619 }
620 break;
621
622 case USB_REQ_SET_INTERFACE:
623 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
624
625 if (crq->bRequestType == USB_RECIP_INTERFACE) {
626 dev->req_config = 1;
627 s3c2410_udc_set_ep0_de_out(base_addr);
628 }
629 break;
630
631 case USB_REQ_SET_ADDRESS:
632 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
633
634 if (crq->bRequestType == USB_RECIP_DEVICE) {
635 tmp = crq->wValue & 0x7F;
636 dev->address = tmp;
637 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
638 S3C2410_UDC_FUNC_ADDR_REG);
639 s3c2410_udc_set_ep0_de_out(base_addr);
640 return;
641 }
642 break;
643
644 case USB_REQ_GET_STATUS:
645 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
646 s3c2410_udc_clear_ep0_opr(base_addr);
647
648 if (dev->req_std) {
649 if (!s3c2410_udc_get_status(dev, crq))
650 return;
651 }
652 break;
653
654 case USB_REQ_CLEAR_FEATURE:
655 s3c2410_udc_clear_ep0_opr(base_addr);
656
657 if (crq->bRequestType != USB_RECIP_ENDPOINT)
658 break;
659
660 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
661 break;
662
663 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
664 s3c2410_udc_set_ep0_de_out(base_addr);
665 return;
666
667 case USB_REQ_SET_FEATURE:
668 s3c2410_udc_clear_ep0_opr(base_addr);
669
670 if (crq->bRequestType != USB_RECIP_ENDPOINT)
671 break;
672
673 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
674 break;
675
676 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
677 s3c2410_udc_set_ep0_de_out(base_addr);
678 return;
679
680 default:
681 s3c2410_udc_clear_ep0_opr(base_addr);
682 break;
683 }
684
685 if (crq->bRequestType & USB_DIR_IN)
686 dev->ep0state = EP0_IN_DATA_PHASE;
687 else
688 dev->ep0state = EP0_OUT_DATA_PHASE;
689
690 if (!dev->driver)
691 return;
692
693
694 ret = dev->driver->setup(&dev->gadget, crq);
695 if (ret < 0) {
696 if (dev->req_config) {
697 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
698 crq->bRequest, ret);
699 return;
700 }
701
702 if (ret == -EOPNOTSUPP)
703 dprintk(DEBUG_NORMAL, "Operation not supported\n");
704 else
705 dprintk(DEBUG_NORMAL,
706 "dev->driver->setup failed. (%d)\n", ret);
707
708 udelay(5);
709 s3c2410_udc_set_ep0_ss(base_addr);
710 s3c2410_udc_set_ep0_de_out(base_addr);
711 dev->ep0state = EP0_IDLE;
712
713 } else if (dev->req_pending) {
714 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
715 dev->req_pending = 0;
716 }
717
718 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
719}
720
721static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
722{
723 u32 ep0csr;
724 struct s3c2410_ep *ep = &dev->ep[0];
725 struct s3c2410_request *req;
726 struct usb_ctrlrequest crq;
727
728 if (list_empty(&ep->queue))
729 req = NULL;
730 else
731 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
732
733
734
735
736 udc_write(0, S3C2410_UDC_INDEX_REG);
737 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
738
739 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
740 ep0csr, ep0states[dev->ep0state]);
741
742
743 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
744 s3c2410_udc_nuke(dev, ep, -EPIPE);
745 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
746 s3c2410_udc_clear_ep0_sst(base_addr);
747 dev->ep0state = EP0_IDLE;
748 return;
749 }
750
751
752 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
753 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
754 s3c2410_udc_nuke(dev, ep, 0);
755 s3c2410_udc_clear_ep0_se(base_addr);
756 dev->ep0state = EP0_IDLE;
757 }
758
759 switch (dev->ep0state) {
760 case EP0_IDLE:
761 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
762 break;
763
764 case EP0_IN_DATA_PHASE:
765 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
766 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
767 s3c2410_udc_write_fifo(ep, req);
768 break;
769
770 case EP0_OUT_DATA_PHASE:
771 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
772 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
773 s3c2410_udc_read_fifo(ep, req);
774 break;
775
776 case EP0_END_XFER:
777 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
778 dev->ep0state = EP0_IDLE;
779 break;
780
781 case EP0_STALL:
782 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
783 dev->ep0state = EP0_IDLE;
784 break;
785 }
786}
787
788
789
790
791
792static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
793{
794 struct s3c2410_request *req;
795 int is_in = ep->bEndpointAddress & USB_DIR_IN;
796 u32 ep_csr1;
797 u32 idx;
798
799 if (likely(!list_empty(&ep->queue)))
800 req = list_entry(ep->queue.next,
801 struct s3c2410_request, queue);
802 else
803 req = NULL;
804
805 idx = ep->bEndpointAddress & 0x7F;
806
807 if (is_in) {
808 udc_write(idx, S3C2410_UDC_INDEX_REG);
809 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
810 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
811 idx, ep_csr1, req ? 1 : 0);
812
813 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
814 dprintk(DEBUG_VERBOSE, "st\n");
815 udc_write(idx, S3C2410_UDC_INDEX_REG);
816 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
817 S3C2410_UDC_IN_CSR1_REG);
818 return;
819 }
820
821 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
822 s3c2410_udc_write_fifo(ep, req);
823 } else {
824 udc_write(idx, S3C2410_UDC_INDEX_REG);
825 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
826 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
827
828 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
829 udc_write(idx, S3C2410_UDC_INDEX_REG);
830 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
831 S3C2410_UDC_OUT_CSR1_REG);
832 return;
833 }
834
835 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
836 s3c2410_udc_read_fifo(ep, req);
837 }
838}
839
840#include <mach/regs-irq.h>
841
842
843
844
845static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
846{
847 struct s3c2410_udc *dev = _dev;
848 int usb_status;
849 int usbd_status;
850 int pwr_reg;
851 int ep0csr;
852 int i;
853 u32 idx, idx2;
854 unsigned long flags;
855
856 spin_lock_irqsave(&dev->lock, flags);
857
858
859 if (!dev->driver) {
860
861 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
862 S3C2410_UDC_USB_INT_REG);
863 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
864 S3C2410_UDC_EP_INT_REG);
865 }
866
867
868 idx = udc_read(S3C2410_UDC_INDEX_REG);
869
870
871 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
872 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
873 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
874
875 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
876 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
877
878 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
879 usb_status, usbd_status, pwr_reg, ep0csr);
880
881
882
883
884
885
886
887
888 if (usb_status & S3C2410_UDC_USBINT_RESET) {
889
890
891
892
893 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
894 ep0csr, pwr_reg);
895
896 dev->gadget.speed = USB_SPEED_UNKNOWN;
897 udc_write(0x00, S3C2410_UDC_INDEX_REG);
898 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
899 S3C2410_UDC_MAXP_REG);
900 dev->address = 0;
901
902 dev->ep0state = EP0_IDLE;
903 dev->gadget.speed = USB_SPEED_FULL;
904
905
906 udc_write(S3C2410_UDC_USBINT_RESET,
907 S3C2410_UDC_USB_INT_REG);
908
909 udc_write(idx, S3C2410_UDC_INDEX_REG);
910 spin_unlock_irqrestore(&dev->lock, flags);
911 return IRQ_HANDLED;
912 }
913
914
915 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
916 dprintk(DEBUG_NORMAL, "USB resume\n");
917
918
919 udc_write(S3C2410_UDC_USBINT_RESUME,
920 S3C2410_UDC_USB_INT_REG);
921
922 if (dev->gadget.speed != USB_SPEED_UNKNOWN
923 && dev->driver
924 && dev->driver->resume)
925 dev->driver->resume(&dev->gadget);
926 }
927
928
929 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
930 dprintk(DEBUG_NORMAL, "USB suspend\n");
931
932
933 udc_write(S3C2410_UDC_USBINT_SUSPEND,
934 S3C2410_UDC_USB_INT_REG);
935
936 if (dev->gadget.speed != USB_SPEED_UNKNOWN
937 && dev->driver
938 && dev->driver->suspend)
939 dev->driver->suspend(&dev->gadget);
940
941 dev->ep0state = EP0_IDLE;
942 }
943
944
945
946
947
948
949 if (usbd_status & S3C2410_UDC_INT_EP0) {
950 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
951
952 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
953 s3c2410_udc_handle_ep0(dev);
954 }
955
956
957 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
958 u32 tmp = 1 << i;
959 if (usbd_status & tmp) {
960 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
961
962
963 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
964 s3c2410_udc_handle_ep(&dev->ep[i]);
965 }
966 }
967
968
969 if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
970 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
971 idx2 = udc_read(S3C2410_UDC_INDEX_REG);
972 udc_write(i, S3C2410_UDC_INDEX_REG);
973
974 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
975 s3c2410_udc_handle_ep(&dev->ep[i]);
976
977
978 udc_write(idx2, S3C2410_UDC_INDEX_REG);
979 }
980 }
981
982 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
983
984
985 udc_write(idx, S3C2410_UDC_INDEX_REG);
986
987 spin_unlock_irqrestore(&dev->lock, flags);
988
989 return IRQ_HANDLED;
990}
991
992
993static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
994{
995 return container_of(ep, struct s3c2410_ep, ep);
996}
997
998static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
999{
1000 return container_of(gadget, struct s3c2410_udc, gadget);
1001}
1002
1003static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1004{
1005 return container_of(req, struct s3c2410_request, req);
1006}
1007
1008
1009
1010
1011static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1012 const struct usb_endpoint_descriptor *desc)
1013{
1014 struct s3c2410_udc *dev;
1015 struct s3c2410_ep *ep;
1016 u32 max, tmp;
1017 unsigned long flags;
1018 u32 csr1, csr2;
1019 u32 int_en_reg;
1020
1021 ep = to_s3c2410_ep(_ep);
1022
1023 if (!_ep || !desc
1024 || _ep->name == ep0name
1025 || desc->bDescriptorType != USB_DT_ENDPOINT)
1026 return -EINVAL;
1027
1028 dev = ep->dev;
1029 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1030 return -ESHUTDOWN;
1031
1032 max = usb_endpoint_maxp(desc);
1033
1034 local_irq_save(flags);
1035 _ep->maxpacket = max;
1036 ep->ep.desc = desc;
1037 ep->halted = 0;
1038 ep->bEndpointAddress = desc->bEndpointAddress;
1039
1040
1041 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1042 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1043
1044
1045 if (desc->bEndpointAddress & USB_DIR_IN) {
1046 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1047 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1048
1049 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1050 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1051 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1052 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1053 } else {
1054
1055 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1056 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1057
1058 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1059 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1060 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1061 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1062
1063 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1064 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1065
1066 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1067 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1068 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1069 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1070 }
1071
1072
1073 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1074 udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1075
1076
1077 tmp = desc->bEndpointAddress;
1078 dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1079 _ep->name, ep->num, tmp,
1080 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1081
1082 local_irq_restore(flags);
1083 s3c2410_udc_set_halt(_ep, 0);
1084
1085 return 0;
1086}
1087
1088
1089
1090
1091static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1092{
1093 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1094 unsigned long flags;
1095 u32 int_en_reg;
1096
1097 if (!_ep || !ep->ep.desc) {
1098 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1099 _ep ? ep->ep.name : NULL);
1100 return -EINVAL;
1101 }
1102
1103 local_irq_save(flags);
1104
1105 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1106
1107 ep->ep.desc = NULL;
1108 ep->halted = 1;
1109
1110 s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1111
1112
1113 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1114 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1115
1116 local_irq_restore(flags);
1117
1118 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1119
1120 return 0;
1121}
1122
1123
1124
1125
1126static struct usb_request *
1127s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1128{
1129 struct s3c2410_request *req;
1130
1131 dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1132
1133 if (!_ep)
1134 return NULL;
1135
1136 req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1137 if (!req)
1138 return NULL;
1139
1140 INIT_LIST_HEAD(&req->queue);
1141 return &req->req;
1142}
1143
1144
1145
1146
1147static void
1148s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1149{
1150 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1151 struct s3c2410_request *req = to_s3c2410_req(_req);
1152
1153 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1154
1155 if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1156 return;
1157
1158 WARN_ON(!list_empty(&req->queue));
1159 kfree(req);
1160}
1161
1162
1163
1164
1165static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1166 gfp_t gfp_flags)
1167{
1168 struct s3c2410_request *req = to_s3c2410_req(_req);
1169 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1170 struct s3c2410_udc *dev;
1171 u32 ep_csr = 0;
1172 int fifo_count = 0;
1173 unsigned long flags;
1174
1175 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1176 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1177 return -EINVAL;
1178 }
1179
1180 dev = ep->dev;
1181 if (unlikely(!dev->driver
1182 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1183 return -ESHUTDOWN;
1184 }
1185
1186 local_irq_save(flags);
1187
1188 if (unlikely(!_req || !_req->complete
1189 || !_req->buf || !list_empty(&req->queue))) {
1190 if (!_req)
1191 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1192 else {
1193 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1194 __func__, !_req->complete, !_req->buf,
1195 !list_empty(&req->queue));
1196 }
1197
1198 local_irq_restore(flags);
1199 return -EINVAL;
1200 }
1201
1202 _req->status = -EINPROGRESS;
1203 _req->actual = 0;
1204
1205 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1206 __func__, ep->bEndpointAddress, _req->length);
1207
1208 if (ep->bEndpointAddress) {
1209 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1210
1211 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1212 ? S3C2410_UDC_IN_CSR1_REG
1213 : S3C2410_UDC_OUT_CSR1_REG);
1214 fifo_count = s3c2410_udc_fifo_count_out();
1215 } else {
1216 udc_write(0, S3C2410_UDC_INDEX_REG);
1217 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1218 fifo_count = s3c2410_udc_fifo_count_out();
1219 }
1220
1221
1222 if (list_empty(&ep->queue) && !ep->halted) {
1223 if (ep->bEndpointAddress == 0 ) {
1224 switch (dev->ep0state) {
1225 case EP0_IN_DATA_PHASE:
1226 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1227 && s3c2410_udc_write_fifo(ep,
1228 req)) {
1229 dev->ep0state = EP0_IDLE;
1230 req = NULL;
1231 }
1232 break;
1233
1234 case EP0_OUT_DATA_PHASE:
1235 if ((!_req->length)
1236 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1237 && s3c2410_udc_read_fifo(ep,
1238 req))) {
1239 dev->ep0state = EP0_IDLE;
1240 req = NULL;
1241 }
1242 break;
1243
1244 default:
1245 local_irq_restore(flags);
1246 return -EL2HLT;
1247 }
1248 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1249 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1250 && s3c2410_udc_write_fifo(ep, req)) {
1251 req = NULL;
1252 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1253 && fifo_count
1254 && s3c2410_udc_read_fifo(ep, req)) {
1255 req = NULL;
1256 }
1257 }
1258
1259
1260 if (likely(req))
1261 list_add_tail(&req->queue, &ep->queue);
1262
1263 local_irq_restore(flags);
1264
1265 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1266 return 0;
1267}
1268
1269
1270
1271
1272static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1273{
1274 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1275 struct s3c2410_udc *udc;
1276 int retval = -EINVAL;
1277 unsigned long flags;
1278 struct s3c2410_request *req = NULL;
1279
1280 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1281
1282 if (!the_controller->driver)
1283 return -ESHUTDOWN;
1284
1285 if (!_ep || !_req)
1286 return retval;
1287
1288 udc = to_s3c2410_udc(ep->gadget);
1289
1290 local_irq_save(flags);
1291
1292 list_for_each_entry(req, &ep->queue, queue) {
1293 if (&req->req == _req) {
1294 list_del_init(&req->queue);
1295 _req->status = -ECONNRESET;
1296 retval = 0;
1297 break;
1298 }
1299 }
1300
1301 if (retval == 0) {
1302 dprintk(DEBUG_VERBOSE,
1303 "dequeued req %p from %s, len %d buf %p\n",
1304 req, _ep->name, _req->length, _req->buf);
1305
1306 s3c2410_udc_done(ep, req, -ECONNRESET);
1307 }
1308
1309 local_irq_restore(flags);
1310 return retval;
1311}
1312
1313
1314
1315
1316static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1317{
1318 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1319 u32 ep_csr = 0;
1320 unsigned long flags;
1321 u32 idx;
1322
1323 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1324 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1325 return -EINVAL;
1326 }
1327
1328 local_irq_save(flags);
1329
1330 idx = ep->bEndpointAddress & 0x7F;
1331
1332 if (idx == 0) {
1333 s3c2410_udc_set_ep0_ss(base_addr);
1334 s3c2410_udc_set_ep0_de_out(base_addr);
1335 } else {
1336 udc_write(idx, S3C2410_UDC_INDEX_REG);
1337 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1338 ? S3C2410_UDC_IN_CSR1_REG
1339 : S3C2410_UDC_OUT_CSR1_REG);
1340
1341 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1342 if (value)
1343 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1344 S3C2410_UDC_IN_CSR1_REG);
1345 else {
1346 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1347 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1348 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1349 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1350 }
1351 } else {
1352 if (value)
1353 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1354 S3C2410_UDC_OUT_CSR1_REG);
1355 else {
1356 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1357 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1358 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1359 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1360 }
1361 }
1362 }
1363
1364 ep->halted = value ? 1 : 0;
1365 local_irq_restore(flags);
1366
1367 return 0;
1368}
1369
1370static const struct usb_ep_ops s3c2410_ep_ops = {
1371 .enable = s3c2410_udc_ep_enable,
1372 .disable = s3c2410_udc_ep_disable,
1373
1374 .alloc_request = s3c2410_udc_alloc_request,
1375 .free_request = s3c2410_udc_free_request,
1376
1377 .queue = s3c2410_udc_queue,
1378 .dequeue = s3c2410_udc_dequeue,
1379
1380 .set_halt = s3c2410_udc_set_halt,
1381};
1382
1383
1384
1385
1386
1387
1388static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1389{
1390 int tmp;
1391
1392 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1393
1394 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1395 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1396 return tmp;
1397}
1398
1399
1400
1401
1402static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1403{
1404 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1405 return 0;
1406}
1407
1408
1409
1410
1411static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1412{
1413 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1414
1415 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1416
1417 gadget->is_selfpowered = (value != 0);
1418 if (value)
1419 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1420 else
1421 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1422
1423 return 0;
1424}
1425
1426static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1427static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1428
1429static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1430{
1431 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1432
1433 if (udc_info && (udc_info->udc_command ||
1434 gpio_is_valid(udc_info->pullup_pin))) {
1435
1436 if (is_on)
1437 s3c2410_udc_enable(udc);
1438 else {
1439 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1440 if (udc->driver && udc->driver->disconnect)
1441 udc->driver->disconnect(&udc->gadget);
1442
1443 }
1444 s3c2410_udc_disable(udc);
1445 }
1446 } else {
1447 return -EOPNOTSUPP;
1448 }
1449
1450 return 0;
1451}
1452
1453static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1454{
1455 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1456
1457 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1458
1459 udc->vbus = (is_active != 0);
1460 s3c2410_udc_set_pullup(udc, is_active);
1461 return 0;
1462}
1463
1464static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1465{
1466 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1467
1468 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1469
1470 s3c2410_udc_set_pullup(udc, is_on);
1471 return 0;
1472}
1473
1474static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1475{
1476 struct s3c2410_udc *dev = _dev;
1477 unsigned int value;
1478
1479 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1480
1481 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1482 if (udc_info->vbus_pin_inverted)
1483 value = !value;
1484
1485 if (value != dev->vbus)
1486 s3c2410_udc_vbus_session(&dev->gadget, value);
1487
1488 return IRQ_HANDLED;
1489}
1490
1491static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1492{
1493 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1494
1495 if (udc_info && udc_info->vbus_draw) {
1496 udc_info->vbus_draw(ma);
1497 return 0;
1498 }
1499
1500 return -ENOTSUPP;
1501}
1502
1503static int s3c2410_udc_start(struct usb_gadget *g,
1504 struct usb_gadget_driver *driver);
1505static int s3c2410_udc_stop(struct usb_gadget *g);
1506
1507static const struct usb_gadget_ops s3c2410_ops = {
1508 .get_frame = s3c2410_udc_get_frame,
1509 .wakeup = s3c2410_udc_wakeup,
1510 .set_selfpowered = s3c2410_udc_set_selfpowered,
1511 .pullup = s3c2410_udc_pullup,
1512 .vbus_session = s3c2410_udc_vbus_session,
1513 .vbus_draw = s3c2410_vbus_draw,
1514 .udc_start = s3c2410_udc_start,
1515 .udc_stop = s3c2410_udc_stop,
1516};
1517
1518static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1519{
1520 if (!udc_info)
1521 return;
1522
1523 if (udc_info->udc_command) {
1524 udc_info->udc_command(cmd);
1525 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1526 int value;
1527
1528 switch (cmd) {
1529 case S3C2410_UDC_P_ENABLE:
1530 value = 1;
1531 break;
1532 case S3C2410_UDC_P_DISABLE:
1533 value = 0;
1534 break;
1535 default:
1536 return;
1537 }
1538 value ^= udc_info->pullup_pin_inverted;
1539
1540 gpio_set_value(udc_info->pullup_pin, value);
1541 }
1542}
1543
1544
1545
1546
1547
1548static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1549{
1550 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1551
1552
1553 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1554 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1555
1556
1557 udc_write(S3C2410_UDC_USBINT_RESET
1558 | S3C2410_UDC_USBINT_RESUME
1559 | S3C2410_UDC_USBINT_SUSPEND,
1560 S3C2410_UDC_USB_INT_REG);
1561
1562 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1563
1564
1565 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1566
1567
1568 dev->gadget.speed = USB_SPEED_UNKNOWN;
1569}
1570
1571
1572
1573
1574static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1575{
1576 u32 i;
1577
1578
1579 INIT_LIST_HEAD(&dev->gadget.ep_list);
1580 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1581 dev->ep0state = EP0_IDLE;
1582
1583 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1584 struct s3c2410_ep *ep = &dev->ep[i];
1585
1586 if (i != 0)
1587 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1588
1589 ep->dev = dev;
1590 ep->ep.desc = NULL;
1591 ep->halted = 0;
1592 INIT_LIST_HEAD(&ep->queue);
1593 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1594 }
1595}
1596
1597
1598
1599
1600static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1601{
1602 int i;
1603
1604 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1605
1606
1607 dev->gadget.speed = USB_SPEED_FULL;
1608
1609
1610 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1611 udc_write(i, S3C2410_UDC_INDEX_REG);
1612 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1613 S3C2410_UDC_MAXP_REG);
1614 }
1615
1616
1617 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1618
1619
1620 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1621 S3C2410_UDC_USB_INT_EN_REG);
1622
1623
1624 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1625
1626
1627 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1628}
1629
1630static int s3c2410_udc_start(struct usb_gadget *g,
1631 struct usb_gadget_driver *driver)
1632{
1633 struct s3c2410_udc *udc = to_s3c2410(g);
1634
1635 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1636
1637
1638 udc->driver = driver;
1639
1640
1641 s3c2410_udc_enable(udc);
1642
1643 return 0;
1644}
1645
1646static int s3c2410_udc_stop(struct usb_gadget *g)
1647{
1648 struct s3c2410_udc *udc = to_s3c2410(g);
1649
1650 udc->driver = NULL;
1651
1652
1653 s3c2410_udc_disable(udc);
1654
1655 return 0;
1656}
1657
1658
1659static struct s3c2410_udc memory = {
1660 .gadget = {
1661 .ops = &s3c2410_ops,
1662 .ep0 = &memory.ep[0].ep,
1663 .name = gadget_name,
1664 .dev = {
1665 .init_name = "gadget",
1666 },
1667 },
1668
1669
1670 .ep[0] = {
1671 .num = 0,
1672 .ep = {
1673 .name = ep0name,
1674 .ops = &s3c2410_ep_ops,
1675 .maxpacket = EP0_FIFO_SIZE,
1676 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1677 USB_EP_CAPS_DIR_ALL),
1678 },
1679 .dev = &memory,
1680 },
1681
1682
1683 .ep[1] = {
1684 .num = 1,
1685 .ep = {
1686 .name = "ep1-bulk",
1687 .ops = &s3c2410_ep_ops,
1688 .maxpacket = EP_FIFO_SIZE,
1689 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1690 USB_EP_CAPS_DIR_ALL),
1691 },
1692 .dev = &memory,
1693 .fifo_size = EP_FIFO_SIZE,
1694 .bEndpointAddress = 1,
1695 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1696 },
1697 .ep[2] = {
1698 .num = 2,
1699 .ep = {
1700 .name = "ep2-bulk",
1701 .ops = &s3c2410_ep_ops,
1702 .maxpacket = EP_FIFO_SIZE,
1703 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1704 USB_EP_CAPS_DIR_ALL),
1705 },
1706 .dev = &memory,
1707 .fifo_size = EP_FIFO_SIZE,
1708 .bEndpointAddress = 2,
1709 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1710 },
1711 .ep[3] = {
1712 .num = 3,
1713 .ep = {
1714 .name = "ep3-bulk",
1715 .ops = &s3c2410_ep_ops,
1716 .maxpacket = EP_FIFO_SIZE,
1717 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1718 USB_EP_CAPS_DIR_ALL),
1719 },
1720 .dev = &memory,
1721 .fifo_size = EP_FIFO_SIZE,
1722 .bEndpointAddress = 3,
1723 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1724 },
1725 .ep[4] = {
1726 .num = 4,
1727 .ep = {
1728 .name = "ep4-bulk",
1729 .ops = &s3c2410_ep_ops,
1730 .maxpacket = EP_FIFO_SIZE,
1731 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1732 USB_EP_CAPS_DIR_ALL),
1733 },
1734 .dev = &memory,
1735 .fifo_size = EP_FIFO_SIZE,
1736 .bEndpointAddress = 4,
1737 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1738 }
1739
1740};
1741
1742
1743
1744
1745static int s3c2410_udc_probe(struct platform_device *pdev)
1746{
1747 struct s3c2410_udc *udc = &memory;
1748 struct device *dev = &pdev->dev;
1749 int retval;
1750 int irq;
1751
1752 dev_dbg(dev, "%s()\n", __func__);
1753
1754 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1755 if (IS_ERR(usb_bus_clock)) {
1756 dev_err(dev, "failed to get usb bus clock source\n");
1757 return PTR_ERR(usb_bus_clock);
1758 }
1759
1760 clk_prepare_enable(usb_bus_clock);
1761
1762 udc_clock = clk_get(NULL, "usb-device");
1763 if (IS_ERR(udc_clock)) {
1764 dev_err(dev, "failed to get udc clock source\n");
1765 return PTR_ERR(udc_clock);
1766 }
1767
1768 clk_prepare_enable(udc_clock);
1769
1770 mdelay(10);
1771
1772 dev_dbg(dev, "got and enabled clocks\n");
1773
1774 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1775 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1776 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1777 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1778 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1779 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1780 }
1781
1782 spin_lock_init(&udc->lock);
1783 udc_info = dev_get_platdata(&pdev->dev);
1784
1785 rsrc_start = S3C2410_PA_USBDEV;
1786 rsrc_len = S3C24XX_SZ_USBDEV;
1787
1788 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1789 return -EBUSY;
1790
1791 base_addr = ioremap(rsrc_start, rsrc_len);
1792 if (!base_addr) {
1793 retval = -ENOMEM;
1794 goto err_mem;
1795 }
1796
1797 the_controller = udc;
1798 platform_set_drvdata(pdev, udc);
1799
1800 s3c2410_udc_disable(udc);
1801 s3c2410_udc_reinit(udc);
1802
1803
1804 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1805 0, gadget_name, udc);
1806
1807 if (retval != 0) {
1808 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1809 retval = -EBUSY;
1810 goto err_map;
1811 }
1812
1813 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1814
1815 if (udc_info && udc_info->vbus_pin > 0) {
1816 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1817 if (retval < 0) {
1818 dev_err(dev, "cannot claim vbus pin\n");
1819 goto err_int;
1820 }
1821
1822 irq = gpio_to_irq(udc_info->vbus_pin);
1823 if (irq < 0) {
1824 dev_err(dev, "no irq for gpio vbus pin\n");
1825 retval = irq;
1826 goto err_gpio_claim;
1827 }
1828
1829 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1830 IRQF_TRIGGER_RISING
1831 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1832 gadget_name, udc);
1833
1834 if (retval != 0) {
1835 dev_err(dev, "can't get vbus irq %d, err %d\n",
1836 irq, retval);
1837 retval = -EBUSY;
1838 goto err_gpio_claim;
1839 }
1840
1841 dev_dbg(dev, "got irq %i\n", irq);
1842 } else {
1843 udc->vbus = 1;
1844 }
1845
1846 if (udc_info && !udc_info->udc_command &&
1847 gpio_is_valid(udc_info->pullup_pin)) {
1848
1849 retval = gpio_request_one(udc_info->pullup_pin,
1850 udc_info->vbus_pin_inverted ?
1851 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1852 "udc pullup");
1853 if (retval)
1854 goto err_vbus_irq;
1855 }
1856
1857 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1858 if (retval)
1859 goto err_add_udc;
1860
1861 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1862 s3c2410_udc_debugfs_root, udc,
1863 &s3c2410_udc_debugfs_fops);
1864
1865 dev_dbg(dev, "probe ok\n");
1866
1867 return 0;
1868
1869err_add_udc:
1870 if (udc_info && !udc_info->udc_command &&
1871 gpio_is_valid(udc_info->pullup_pin))
1872 gpio_free(udc_info->pullup_pin);
1873err_vbus_irq:
1874 if (udc_info && udc_info->vbus_pin > 0)
1875 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1876err_gpio_claim:
1877 if (udc_info && udc_info->vbus_pin > 0)
1878 gpio_free(udc_info->vbus_pin);
1879err_int:
1880 free_irq(IRQ_USBD, udc);
1881err_map:
1882 iounmap(base_addr);
1883err_mem:
1884 release_mem_region(rsrc_start, rsrc_len);
1885
1886 return retval;
1887}
1888
1889
1890
1891
1892static int s3c2410_udc_remove(struct platform_device *pdev)
1893{
1894 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1895 unsigned int irq;
1896
1897 dev_dbg(&pdev->dev, "%s()\n", __func__);
1898
1899 if (udc->driver)
1900 return -EBUSY;
1901
1902 usb_del_gadget_udc(&udc->gadget);
1903 debugfs_remove(udc->regs_info);
1904
1905 if (udc_info && !udc_info->udc_command &&
1906 gpio_is_valid(udc_info->pullup_pin))
1907 gpio_free(udc_info->pullup_pin);
1908
1909 if (udc_info && udc_info->vbus_pin > 0) {
1910 irq = gpio_to_irq(udc_info->vbus_pin);
1911 free_irq(irq, udc);
1912 }
1913
1914 free_irq(IRQ_USBD, udc);
1915
1916 iounmap(base_addr);
1917 release_mem_region(rsrc_start, rsrc_len);
1918
1919 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1920 clk_disable_unprepare(udc_clock);
1921 clk_put(udc_clock);
1922 udc_clock = NULL;
1923 }
1924
1925 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1926 clk_disable_unprepare(usb_bus_clock);
1927 clk_put(usb_bus_clock);
1928 usb_bus_clock = NULL;
1929 }
1930
1931 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1932 return 0;
1933}
1934
1935#ifdef CONFIG_PM
1936static int
1937s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1938{
1939 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1940
1941 return 0;
1942}
1943
1944static int s3c2410_udc_resume(struct platform_device *pdev)
1945{
1946 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1947
1948 return 0;
1949}
1950#else
1951#define s3c2410_udc_suspend NULL
1952#define s3c2410_udc_resume NULL
1953#endif
1954
1955static const struct platform_device_id s3c_udc_ids[] = {
1956 { "s3c2410-usbgadget", },
1957 { "s3c2440-usbgadget", },
1958 { }
1959};
1960MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1961
1962static struct platform_driver udc_driver_24x0 = {
1963 .driver = {
1964 .name = "s3c24x0-usbgadget",
1965 },
1966 .probe = s3c2410_udc_probe,
1967 .remove = s3c2410_udc_remove,
1968 .suspend = s3c2410_udc_suspend,
1969 .resume = s3c2410_udc_resume,
1970 .id_table = s3c_udc_ids,
1971};
1972
1973static int __init udc_init(void)
1974{
1975 int retval;
1976
1977 dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
1978
1979 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
1980
1981 retval = platform_driver_register(&udc_driver_24x0);
1982 if (retval)
1983 goto err;
1984
1985 return 0;
1986
1987err:
1988 debugfs_remove(s3c2410_udc_debugfs_root);
1989 return retval;
1990}
1991
1992static void __exit udc_exit(void)
1993{
1994 platform_driver_unregister(&udc_driver_24x0);
1995 debugfs_remove_recursive(s3c2410_udc_debugfs_root);
1996}
1997
1998module_init(udc_init);
1999module_exit(udc_exit);
2000
2001MODULE_AUTHOR(DRIVER_AUTHOR);
2002MODULE_DESCRIPTION(DRIVER_DESC);
2003MODULE_LICENSE("GPL");
2004
