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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / usb / gadget / s3c2410_udc.c
blobab9c65e2c1d57c880c976b1757f58567ac3529eb
1 /*
2 * linux/drivers/usb/gadget/s3c2410_udc.c
3 *
4 * Samsung S3C24xx series on-chip full speed USB device controllers
5 *
6 * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
7 * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 */
14
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/delay.h>
18 #include <linux/ioport.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/errno.h>
22 #include <linux/init.h>
23 #include <linux/timer.h>
24 #include <linux/list.h>
25 #include <linux/interrupt.h>
26 #include <linux/platform_device.h>
27 #include <linux/clk.h>
28 #include <linux/gpio.h>
29 #include <linux/prefetch.h>
30
31 #include <linux/debugfs.h>
32 #include <linux/seq_file.h>
33
34 #include <linux/usb.h>
35 #include <linux/usb/gadget.h>
36
37 #include <asm/byteorder.h>
38 #include <asm/io.h>
39 #include <asm/irq.h>
40 #include <asm/system.h>
41 #include <asm/unaligned.h>
42 #include <mach/irqs.h>
43
44 #include <mach/hardware.h>
45
46 #include <plat/regs-udc.h>
47 #include <plat/udc.h>
48
49
50 #include "s3c2410_udc.h"
51
52 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
53 #define DRIVER_VERSION "29 Apr 2007"
54 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
55 "Arnaud Patard <arnaud.patard@rtp-net.org>"
56
57 static const char gadget_name[] = "s3c2410_udc";
58 static const char driver_desc[] = DRIVER_DESC;
59
60 static struct s3c2410_udc *the_controller;
61 static struct clk *udc_clock;
62 static struct clk *usb_bus_clock;
63 static void __iomem *base_addr;
64 static u64 rsrc_start;
65 static u64 rsrc_len;
66 static struct dentry *s3c2410_udc_debugfs_root;
67
68 static inline u32 udc_read(u32 reg)
69 {
70 return readb(base_addr + reg);
71 }
72
73 static inline void udc_write(u32 value, u32 reg)
74 {
75 writeb(value, base_addr + reg);
76 }
77
78 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
79 {
80 writeb(value, base + reg);
81 }
82
83 static struct s3c2410_udc_mach_info *udc_info;
84
85 /*************************** DEBUG FUNCTION ***************************/
86 #define DEBUG_NORMAL 1
87 #define DEBUG_VERBOSE 2
88
89 #ifdef CONFIG_USB_S3C2410_DEBUG
90 #define USB_S3C2410_DEBUG_LEVEL 0
91
92 static uint32_t s3c2410_ticks = 0;
93
94 static int dprintk(int level, const char *fmt, ...)
95 {
96 static char printk_buf[1024];
97 static long prevticks;
98 static int invocation;
99 va_list args;
100 int len;
101
102 if (level > USB_S3C2410_DEBUG_LEVEL)
103 return 0;
104
105 if (s3c2410_ticks != prevticks) {
106 prevticks = s3c2410_ticks;
107 invocation = 0;
108 }
109
110 len = scnprintf(printk_buf,
111 sizeof(printk_buf), "%1lu.%02d USB: ",
112 prevticks, invocation++);
113
114 va_start(args, fmt);
115 len = vscnprintf(printk_buf+len,
116 sizeof(printk_buf)-len, fmt, args);
117 va_end(args);
118
119 return printk(KERN_DEBUG "%s", printk_buf);
120 }
121 #else
122 static int dprintk(int level, const char *fmt, ...)
123 {
124 return 0;
125 }
126 #endif
127 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
128 {
129 u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
130 u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
131 u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
132 u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
133
134 addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
135 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
136 ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
137 usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
138 ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
139 usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
140 udc_write(0, S3C2410_UDC_INDEX_REG);
141 ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
142 udc_write(1, S3C2410_UDC_INDEX_REG);
143 ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
144 ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
145 ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
146 ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
147 udc_write(2, S3C2410_UDC_INDEX_REG);
148 ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
149 ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
150 ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
151 ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
152
153 seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
154 "PWR_REG : 0x%04X\n"
155 "EP_INT_REG : 0x%04X\n"
156 "USB_INT_REG : 0x%04X\n"
157 "EP_INT_EN_REG : 0x%04X\n"
158 "USB_INT_EN_REG : 0x%04X\n"
159 "EP0_CSR : 0x%04X\n"
160 "EP1_I_CSR1 : 0x%04X\n"
161 "EP1_I_CSR2 : 0x%04X\n"
162 "EP1_O_CSR1 : 0x%04X\n"
163 "EP1_O_CSR2 : 0x%04X\n"
164 "EP2_I_CSR1 : 0x%04X\n"
165 "EP2_I_CSR2 : 0x%04X\n"
166 "EP2_O_CSR1 : 0x%04X\n"
167 "EP2_O_CSR2 : 0x%04X\n",
168 addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
169 ep_int_en_reg, usb_int_en_reg, ep0_csr,
170 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
171 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
172 );
173
174 return 0;
175 }
176
177 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
178 struct file *file)
179 {
180 return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
181 }
182
183 static const struct file_operations s3c2410_udc_debugfs_fops = {
184 .open = s3c2410_udc_debugfs_fops_open,
185 .read = seq_read,
186 .llseek = seq_lseek,
187 .release = single_release,
188 .owner = THIS_MODULE,
189 };
190
191 /* io macros */
192
193 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
194 {
195 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
196 udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
197 S3C2410_UDC_EP0_CSR_REG);
198 }
199
200 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
201 {
202 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
203 writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
204 }
205
206 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
207 {
208 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
209 udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
210 }
211
212 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
213 {
214 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
215 udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
216 }
217
218 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
219 {
220 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
221 udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
222 }
223
224 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
225 {
226 udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
227 udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
228 }
229
230 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
231 {
232 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
233
234 udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
235 | S3C2410_UDC_EP0_CSR_DE),
236 S3C2410_UDC_EP0_CSR_REG);
237 }
238
239 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
240 {
241 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
242 udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
243 | S3C2410_UDC_EP0_CSR_SSE),
244 S3C2410_UDC_EP0_CSR_REG);
245 }
246
247 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
248 {
249 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
250 udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
251 | S3C2410_UDC_EP0_CSR_DE),
252 S3C2410_UDC_EP0_CSR_REG);
253 }
254
255 /*------------------------- I/O ----------------------------------*/
256
257 /*
258 * s3c2410_udc_done
259 */
260 static void s3c2410_udc_done(struct s3c2410_ep *ep,
261 struct s3c2410_request *req, int status)
262 {
263 unsigned halted = ep->halted;
264
265 list_del_init(&req->queue);
266
267 if (likely (req->req.status == -EINPROGRESS))
268 req->req.status = status;
269 else
270 status = req->req.status;
271
272 ep->halted = 1;
273 req->req.complete(&ep->ep, &req->req);
274 ep->halted = halted;
275 }
276
277 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
278 struct s3c2410_ep *ep, int status)
279 {
280 /* Sanity check */
281 if (&ep->queue == NULL)
282 return;
283
284 while (!list_empty (&ep->queue)) {
285 struct s3c2410_request *req;
286 req = list_entry (ep->queue.next, struct s3c2410_request,
287 queue);
288 s3c2410_udc_done(ep, req, status);
289 }
290 }
291
292 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
293 {
294 unsigned i;
295
296 /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
297 * fifos, and pending transactions mustn't be continued in any case.
298 */
299
300 for (i = 1; i < S3C2410_ENDPOINTS; i++)
301 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
302 }
303
304 static inline int s3c2410_udc_fifo_count_out(void)
305 {
306 int tmp;
307
308 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
309 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
310 return tmp;
311 }
312
313 /*
314 * s3c2410_udc_write_packet
315 */
316 static inline int s3c2410_udc_write_packet(int fifo,
317 struct s3c2410_request *req,
318 unsigned max)
319 {
320 unsigned len = min(req->req.length - req->req.actual, max);
321 u8 *buf = req->req.buf + req->req.actual;
322
323 prefetch(buf);
324
325 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
326 req->req.actual, req->req.length, len, req->req.actual + len);
327
328 req->req.actual += len;
329
330 udelay(5);
331 writesb(base_addr + fifo, buf, len);
332 return len;
333 }
334
335 /*
336 * s3c2410_udc_write_fifo
337 *
338 * return: 0 = still running, 1 = completed, negative = errno
339 */
340 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
341 struct s3c2410_request *req)
342 {
343 unsigned count;
344 int is_last;
345 u32 idx;
346 int fifo_reg;
347 u32 ep_csr;
348
349 idx = ep->bEndpointAddress & 0x7F;
350 switch (idx) {
351 default:
352 idx = 0;
353 case 0:
354 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
355 break;
356 case 1:
357 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
358 break;
359 case 2:
360 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
361 break;
362 case 3:
363 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
364 break;
365 case 4:
366 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
367 break;
368 }
369
370 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
371
372 /* last packet is often short (sometimes a zlp) */
373 if (count != ep->ep.maxpacket)
374 is_last = 1;
375 else if (req->req.length != req->req.actual || req->req.zero)
376 is_last = 0;
377 else
378 is_last = 2;
379
380 /* Only ep0 debug messages are interesting */
381 if (idx == 0)
382 dprintk(DEBUG_NORMAL,
383 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
384 idx, count, req->req.actual, req->req.length,
385 is_last, req->req.zero);
386
387 if (is_last) {
388 /* The order is important. It prevents sending 2 packets
389 * at the same time */
390
391 if (idx == 0) {
392 /* Reset signal => no need to say 'data sent' */
393 if (! (udc_read(S3C2410_UDC_USB_INT_REG)
394 & S3C2410_UDC_USBINT_RESET))
395 s3c2410_udc_set_ep0_de_in(base_addr);
396 ep->dev->ep0state=EP0_IDLE;
397 } else {
398 udc_write(idx, S3C2410_UDC_INDEX_REG);
399 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
400 udc_write(idx, S3C2410_UDC_INDEX_REG);
401 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
402 S3C2410_UDC_IN_CSR1_REG);
403 }
404
405 s3c2410_udc_done(ep, req, 0);
406 is_last = 1;
407 } else {
408 if (idx == 0) {
409 /* Reset signal => no need to say 'data sent' */
410 if (! (udc_read(S3C2410_UDC_USB_INT_REG)
411 & S3C2410_UDC_USBINT_RESET))
412 s3c2410_udc_set_ep0_ipr(base_addr);
413 } else {
414 udc_write(idx, S3C2410_UDC_INDEX_REG);
415 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
416 udc_write(idx, S3C2410_UDC_INDEX_REG);
417 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
418 S3C2410_UDC_IN_CSR1_REG);
419 }
420 }
421
422 return is_last;
423 }
424
425 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
426 struct s3c2410_request *req, unsigned avail)
427 {
428 unsigned len;
429
430 len = min(req->req.length - req->req.actual, avail);
431 req->req.actual += len;
432
433 readsb(fifo + base_addr, buf, len);
434 return len;
435 }
436
437 /*
438 * return: 0 = still running, 1 = queue empty, negative = errno
439 */
440 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
441 struct s3c2410_request *req)
442 {
443 u8 *buf;
444 u32 ep_csr;
445 unsigned bufferspace;
446 int is_last=1;
447 unsigned avail;
448 int fifo_count = 0;
449 u32 idx;
450 int fifo_reg;
451
452 idx = ep->bEndpointAddress & 0x7F;
453
454 switch (idx) {
455 default:
456 idx = 0;
457 case 0:
458 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
459 break;
460 case 1:
461 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
462 break;
463 case 2:
464 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
465 break;
466 case 3:
467 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
468 break;
469 case 4:
470 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
471 break;
472 }
473
474 if (!req->req.length)
475 return 1;
476
477 buf = req->req.buf + req->req.actual;
478 bufferspace = req->req.length - req->req.actual;
479 if (!bufferspace) {
480 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
481 return -1;
482 }
483
484 udc_write(idx, S3C2410_UDC_INDEX_REG);
485
486 fifo_count = s3c2410_udc_fifo_count_out();
487 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
488
489 if (fifo_count > ep->ep.maxpacket)
490 avail = ep->ep.maxpacket;
491 else
492 avail = fifo_count;
493
494 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
495
496 /* checking this with ep0 is not accurate as we already
497 * read a control request
498 **/
499 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
500 is_last = 1;
501 /* overflowed this request? flush extra data */
502 if (fifo_count != avail)
503 req->req.status = -EOVERFLOW;
504 } else {
505 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
506 }
507
508 udc_write(idx, S3C2410_UDC_INDEX_REG);
509 fifo_count = s3c2410_udc_fifo_count_out();
510
511 /* Only ep0 debug messages are interesting */
512 if (idx == 0)
513 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
514 __func__, fifo_count,is_last);
515
516 if (is_last) {
517 if (idx == 0) {
518 s3c2410_udc_set_ep0_de_out(base_addr);
519 ep->dev->ep0state = EP0_IDLE;
520 } else {
521 udc_write(idx, S3C2410_UDC_INDEX_REG);
522 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
523 udc_write(idx, S3C2410_UDC_INDEX_REG);
524 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
525 S3C2410_UDC_OUT_CSR1_REG);
526 }
527
528 s3c2410_udc_done(ep, req, 0);
529 } else {
530 if (idx == 0) {
531 s3c2410_udc_clear_ep0_opr(base_addr);
532 } else {
533 udc_write(idx, S3C2410_UDC_INDEX_REG);
534 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
535 udc_write(idx, S3C2410_UDC_INDEX_REG);
536 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
537 S3C2410_UDC_OUT_CSR1_REG);
538 }
539 }
540
541 return is_last;
542 }
543
544 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
545 {
546 unsigned char *outbuf = (unsigned char*)crq;
547 int bytes_read = 0;
548
549 udc_write(0, S3C2410_UDC_INDEX_REG);
550
551 bytes_read = s3c2410_udc_fifo_count_out();
552
553 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
554
555 if (bytes_read > sizeof(struct usb_ctrlrequest))
556 bytes_read = sizeof(struct usb_ctrlrequest);
557
558 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
559
560 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
561 bytes_read, crq->bRequest, crq->bRequestType,
562 crq->wValue, crq->wIndex, crq->wLength);
563
564 return bytes_read;
565 }
566
567 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
568 struct usb_ctrlrequest *crq)
569 {
570 u16 status = 0;
571 u8 ep_num = crq->wIndex & 0x7F;
572 u8 is_in = crq->wIndex & USB_DIR_IN;
573
574 switch (crq->bRequestType & USB_RECIP_MASK) {
575 case USB_RECIP_INTERFACE:
576 break;
577
578 case USB_RECIP_DEVICE:
579 status = dev->devstatus;
580 break;
581
582 case USB_RECIP_ENDPOINT:
583 if (ep_num > 4 || crq->wLength > 2)
584 return 1;
585
586 if (ep_num == 0) {
587 udc_write(0, S3C2410_UDC_INDEX_REG);
588 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
589 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
590 } else {
591 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
592 if (is_in) {
593 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
594 status = status & S3C2410_UDC_ICSR1_SENDSTL;
595 } else {
596 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
597 status = status & S3C2410_UDC_OCSR1_SENDSTL;
598 }
599 }
600
601 status = status ? 1 : 0;
602 break;
603
604 default:
605 return 1;
606 }
607
608 /* Seems to be needed to get it working. ouch :( */
609 udelay(5);
610 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
611 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
612 s3c2410_udc_set_ep0_de_in(base_addr);
613
614 return 0;
615 }
616 /*------------------------- usb state machine -------------------------------*/
617 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
618
619 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
620 struct s3c2410_ep *ep,
621 struct usb_ctrlrequest *crq,
622 u32 ep0csr)
623 {
624 int len, ret, tmp;
625
626 /* start control request? */
627 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
628 return;
629
630 s3c2410_udc_nuke(dev, ep, -EPROTO);
631
632 len = s3c2410_udc_read_fifo_crq(crq);
633 if (len != sizeof(*crq)) {
634 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
635 " wanted %d bytes got %d. Stalling out...\n",
636 sizeof(*crq), len);
637 s3c2410_udc_set_ep0_ss(base_addr);
638 return;
639 }
640
641 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
642 crq->bRequest, crq->bRequestType, crq->wLength);
643
644 /* cope with automagic for some standard requests. */
645 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
646 == USB_TYPE_STANDARD;
647 dev->req_config = 0;
648 dev->req_pending = 1;
649
650 switch (crq->bRequest) {
651 case USB_REQ_SET_CONFIGURATION:
652 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
653
654 if (crq->bRequestType == USB_RECIP_DEVICE) {
655 dev->req_config = 1;
656 s3c2410_udc_set_ep0_de_out(base_addr);
657 }
658 break;
659
660 case USB_REQ_SET_INTERFACE:
661 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
662
663 if (crq->bRequestType == USB_RECIP_INTERFACE) {
664 dev->req_config = 1;
665 s3c2410_udc_set_ep0_de_out(base_addr);
666 }
667 break;
668
669 case USB_REQ_SET_ADDRESS:
670 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
671
672 if (crq->bRequestType == USB_RECIP_DEVICE) {
673 tmp = crq->wValue & 0x7F;
674 dev->address = tmp;
675 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
676 S3C2410_UDC_FUNC_ADDR_REG);
677 s3c2410_udc_set_ep0_de_out(base_addr);
678 return;
679 }
680 break;
681
682 case USB_REQ_GET_STATUS:
683 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
684 s3c2410_udc_clear_ep0_opr(base_addr);
685
686 if (dev->req_std) {
687 if (!s3c2410_udc_get_status(dev, crq)) {
688 return;
689 }
690 }
691 break;
692
693 case USB_REQ_CLEAR_FEATURE:
694 s3c2410_udc_clear_ep0_opr(base_addr);
695
696 if (crq->bRequestType != USB_RECIP_ENDPOINT)
697 break;
698
699 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
700 break;
701
702 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
703 s3c2410_udc_set_ep0_de_out(base_addr);
704 return;
705
706 case USB_REQ_SET_FEATURE:
707 s3c2410_udc_clear_ep0_opr(base_addr);
708
709 if (crq->bRequestType != USB_RECIP_ENDPOINT)
710 break;
711
712 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
713 break;
714
715 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
716 s3c2410_udc_set_ep0_de_out(base_addr);
717 return;
718
719 default:
720 s3c2410_udc_clear_ep0_opr(base_addr);
721 break;
722 }
723
724 if (crq->bRequestType & USB_DIR_IN)
725 dev->ep0state = EP0_IN_DATA_PHASE;
726 else
727 dev->ep0state = EP0_OUT_DATA_PHASE;
728
729 if (!dev->driver)
730 return;
731
732 /* deliver the request to the gadget driver */
733 ret = dev->driver->setup(&dev->gadget, crq);
734 if (ret < 0) {
735 if (dev->req_config) {
736 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
737 crq->bRequest, ret);
738 return;
739 }
740
741 if (ret == -EOPNOTSUPP)
742 dprintk(DEBUG_NORMAL, "Operation not supported\n");
743 else
744 dprintk(DEBUG_NORMAL,
745 "dev->driver->setup failed. (%d)\n", ret);
746
747 udelay(5);
748 s3c2410_udc_set_ep0_ss(base_addr);
749 s3c2410_udc_set_ep0_de_out(base_addr);
750 dev->ep0state = EP0_IDLE;
751 /* deferred i/o == no response yet */
752 } else if (dev->req_pending) {
753 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
754 dev->req_pending=0;
755 }
756
757 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
758 }
759
760 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
761 {
762 u32 ep0csr;
763 struct s3c2410_ep *ep = &dev->ep[0];
764 struct s3c2410_request *req;
765 struct usb_ctrlrequest crq;
766
767 if (list_empty(&ep->queue))
768 req = NULL;
769 else
770 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
771
772 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
773 * S3C2410_UDC_EP0_CSR_REG when index is zero */
774
775 udc_write(0, S3C2410_UDC_INDEX_REG);
776 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
777
778 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
779 ep0csr, ep0states[dev->ep0state]);
780
781 /* clear stall status */
782 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
783 s3c2410_udc_nuke(dev, ep, -EPIPE);
784 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
785 s3c2410_udc_clear_ep0_sst(base_addr);
786 dev->ep0state = EP0_IDLE;
787 return;
788 }
789
790 /* clear setup end */
791 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
792 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
793 s3c2410_udc_nuke(dev, ep, 0);
794 s3c2410_udc_clear_ep0_se(base_addr);
795 dev->ep0state = EP0_IDLE;
796 }
797
798 switch (dev->ep0state) {
799 case EP0_IDLE:
800 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
801 break;
802
803 case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
804 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
805 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
806 s3c2410_udc_write_fifo(ep, req);
807 }
808 break;
809
810 case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
811 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
812 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
813 s3c2410_udc_read_fifo(ep,req);
814 }
815 break;
816
817 case EP0_END_XFER:
818 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
819 dev->ep0state = EP0_IDLE;
820 break;
821
822 case EP0_STALL:
823 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
824 dev->ep0state = EP0_IDLE;
825 break;
826 }
827 }
828
829 /*
830 * handle_ep - Manage I/O endpoints
831 */
832
833 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
834 {
835 struct s3c2410_request *req;
836 int is_in = ep->bEndpointAddress & USB_DIR_IN;
837 u32 ep_csr1;
838 u32 idx;
839
840 if (likely (!list_empty(&ep->queue)))
841 req = list_entry(ep->queue.next,
842 struct s3c2410_request, queue);
843 else
844 req = NULL;
845
846 idx = ep->bEndpointAddress & 0x7F;
847
848 if (is_in) {
849 udc_write(idx, S3C2410_UDC_INDEX_REG);
850 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
851 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
852 idx, ep_csr1, req ? 1 : 0);
853
854 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
855 dprintk(DEBUG_VERBOSE, "st\n");
856 udc_write(idx, S3C2410_UDC_INDEX_REG);
857 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
858 S3C2410_UDC_IN_CSR1_REG);
859 return;
860 }
861
862 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
863 s3c2410_udc_write_fifo(ep,req);
864 }
865 } else {
866 udc_write(idx, S3C2410_UDC_INDEX_REG);
867 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
868 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
869
870 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
871 udc_write(idx, S3C2410_UDC_INDEX_REG);
872 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
873 S3C2410_UDC_OUT_CSR1_REG);
874 return;
875 }
876
877 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
878 s3c2410_udc_read_fifo(ep,req);
879 }
880 }
881 }
882
883 #include <mach/regs-irq.h>
884
885 /*
886 * s3c2410_udc_irq - interrupt handler
887 */
888 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
889 {
890 struct s3c2410_udc *dev = _dev;
891 int usb_status;
892 int usbd_status;
893 int pwr_reg;
894 int ep0csr;
895 int i;
896 u32 idx, idx2;
897 unsigned long flags;
898
899 spin_lock_irqsave(&dev->lock, flags);
900
901 /* Driver connected ? */
902 if (!dev->driver) {
903 /* Clear interrupts */
904 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
905 S3C2410_UDC_USB_INT_REG);
906 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
907 S3C2410_UDC_EP_INT_REG);
908 }
909
910 /* Save index */
911 idx = udc_read(S3C2410_UDC_INDEX_REG);
912
913 /* Read status registers */
914 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
915 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
916 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
917
918 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
919 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
920
921 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
922 usb_status, usbd_status, pwr_reg, ep0csr);
923
924 /*
925 * Now, handle interrupts. There's two types :
926 * - Reset, Resume, Suspend coming -> usb_int_reg
927 * - EP -> ep_int_reg
928 */
929
930 /* RESET */
931 if (usb_status & S3C2410_UDC_USBINT_RESET) {
932 /* two kind of reset :
933 * - reset start -> pwr reg = 8
934 * - reset end -> pwr reg = 0
935 **/
936 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
937 ep0csr, pwr_reg);
938
939 dev->gadget.speed = USB_SPEED_UNKNOWN;
940 udc_write(0x00, S3C2410_UDC_INDEX_REG);
941 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
942 S3C2410_UDC_MAXP_REG);
943 dev->address = 0;
944
945 dev->ep0state = EP0_IDLE;
946 dev->gadget.speed = USB_SPEED_FULL;
947
948 /* clear interrupt */
949 udc_write(S3C2410_UDC_USBINT_RESET,
950 S3C2410_UDC_USB_INT_REG);
951
952 udc_write(idx, S3C2410_UDC_INDEX_REG);
953 spin_unlock_irqrestore(&dev->lock, flags);
954 return IRQ_HANDLED;
955 }
956
957 /* RESUME */
958 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
959 dprintk(DEBUG_NORMAL, "USB resume\n");
960
961 /* clear interrupt */
962 udc_write(S3C2410_UDC_USBINT_RESUME,
963 S3C2410_UDC_USB_INT_REG);
964
965 if (dev->gadget.speed != USB_SPEED_UNKNOWN
966 && dev->driver
967 && dev->driver->resume)
968 dev->driver->resume(&dev->gadget);
969 }
970
971 /* SUSPEND */
972 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
973 dprintk(DEBUG_NORMAL, "USB suspend\n");
974
975 /* clear interrupt */
976 udc_write(S3C2410_UDC_USBINT_SUSPEND,
977 S3C2410_UDC_USB_INT_REG);
978
979 if (dev->gadget.speed != USB_SPEED_UNKNOWN
980 && dev->driver
981 && dev->driver->suspend)
982 dev->driver->suspend(&dev->gadget);
983
984 dev->ep0state = EP0_IDLE;
985 }
986
987 /* EP */
988 /* control traffic */
989 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
990 * generate an interrupt
991 */
992 if (usbd_status & S3C2410_UDC_INT_EP0) {
993 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
994 /* Clear the interrupt bit by setting it to 1 */
995 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
996 s3c2410_udc_handle_ep0(dev);
997 }
998
999 /* endpoint data transfers */
1000 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1001 u32 tmp = 1 << i;
1002 if (usbd_status & tmp) {
1003 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1004
1005 /* Clear the interrupt bit by setting it to 1 */
1006 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1007 s3c2410_udc_handle_ep(&dev->ep[i]);
1008 }
1009 }
1010
1011 /* what else causes this interrupt? a receive! who is it? */
1012 if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1013 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1014 idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1015 udc_write(i, S3C2410_UDC_INDEX_REG);
1016
1017 if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1018 s3c2410_udc_handle_ep(&dev->ep[i]);
1019
1020 /* restore index */
1021 udc_write(idx2, S3C2410_UDC_INDEX_REG);
1022 }
1023 }
1024
1025 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1026
1027 /* Restore old index */
1028 udc_write(idx, S3C2410_UDC_INDEX_REG);
1029
1030 spin_unlock_irqrestore(&dev->lock, flags);
1031
1032 return IRQ_HANDLED;
1033 }
1034 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1035
1036 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1037 {
1038 return container_of(ep, struct s3c2410_ep, ep);
1039 }
1040
1041 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1042 {
1043 return container_of(gadget, struct s3c2410_udc, gadget);
1044 }
1045
1046 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1047 {
1048 return container_of(req, struct s3c2410_request, req);
1049 }
1050
1051 /*
1052 * s3c2410_udc_ep_enable
1053 */
1054 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1055 const struct usb_endpoint_descriptor *desc)
1056 {
1057 struct s3c2410_udc *dev;
1058 struct s3c2410_ep *ep;
1059 u32 max, tmp;
1060 unsigned long flags;
1061 u32 csr1,csr2;
1062 u32 int_en_reg;
1063
1064 ep = to_s3c2410_ep(_ep);
1065
1066 if (!_ep || !desc || ep->desc
1067 || _ep->name == ep0name
1068 || desc->bDescriptorType != USB_DT_ENDPOINT)
1069 return -EINVAL;
1070
1071 dev = ep->dev;
1072 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1073 return -ESHUTDOWN;
1074
1075 max = usb_endpoint_maxp(desc) & 0x1fff;
1076
1077 local_irq_save (flags);
1078 _ep->maxpacket = max & 0x7ff;
1079 ep->desc = desc;
1080 ep->halted = 0;
1081 ep->bEndpointAddress = desc->bEndpointAddress;
1082
1083 /* set max packet */
1084 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1085 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1086
1087 /* set type, direction, address; reset fifo counters */
1088 if (desc->bEndpointAddress & USB_DIR_IN) {
1089 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1090 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1091
1092 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1093 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1094 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1095 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1096 } else {
1097 /* don't flush in fifo or it will cause endpoint interrupt */
1098 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1099 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1100
1101 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1102 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1103 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1104 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1105
1106 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1107 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1108
1109 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1110 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1111 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1112 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1113 }
1114
1115 /* enable irqs */
1116 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1117 udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1118
1119 /* print some debug message */
1120 tmp = desc->bEndpointAddress;
1121 dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1122 _ep->name,ep->num, tmp,
1123 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1124
1125 local_irq_restore (flags);
1126 s3c2410_udc_set_halt(_ep, 0);
1127
1128 return 0;
1129 }
1130
1131 /*
1132 * s3c2410_udc_ep_disable
1133 */
1134 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1135 {
1136 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1137 unsigned long flags;
1138 u32 int_en_reg;
1139
1140 if (!_ep || !ep->desc) {
1141 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1142 _ep ? ep->ep.name : NULL);
1143 return -EINVAL;
1144 }
1145
1146 local_irq_save(flags);
1147
1148 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1149
1150 ep->desc = NULL;
1151 ep->ep.desc = NULL;
1152 ep->halted = 1;
1153
1154 s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1155
1156 /* disable irqs */
1157 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1158 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1159
1160 local_irq_restore(flags);
1161
1162 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1163
1164 return 0;
1165 }
1166
1167 /*
1168 * s3c2410_udc_alloc_request
1169 */
1170 static struct usb_request *
1171 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1172 {
1173 struct s3c2410_request *req;
1174
1175 dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1176
1177 if (!_ep)
1178 return NULL;
1179
1180 req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1181 if (!req)
1182 return NULL;
1183
1184 INIT_LIST_HEAD (&req->queue);
1185 return &req->req;
1186 }
1187
1188 /*
1189 * s3c2410_udc_free_request
1190 */
1191 static void
1192 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1193 {
1194 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1195 struct s3c2410_request *req = to_s3c2410_req(_req);
1196
1197 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1198
1199 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1200 return;
1201
1202 WARN_ON (!list_empty (&req->queue));
1203 kfree(req);
1204 }
1205
1206 /*
1207 * s3c2410_udc_queue
1208 */
1209 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1210 gfp_t gfp_flags)
1211 {
1212 struct s3c2410_request *req = to_s3c2410_req(_req);
1213 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1214 struct s3c2410_udc *dev;
1215 u32 ep_csr = 0;
1216 int fifo_count = 0;
1217 unsigned long flags;
1218
1219 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1220 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1221 return -EINVAL;
1222 }
1223
1224 dev = ep->dev;
1225 if (unlikely (!dev->driver
1226 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1227 return -ESHUTDOWN;
1228 }
1229
1230 local_irq_save (flags);
1231
1232 if (unlikely(!_req || !_req->complete
1233 || !_req->buf || !list_empty(&req->queue))) {
1234 if (!_req)
1235 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1236 else {
1237 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1238 __func__, !_req->complete,!_req->buf,
1239 !list_empty(&req->queue));
1240 }
1241
1242 local_irq_restore(flags);
1243 return -EINVAL;
1244 }
1245
1246 _req->status = -EINPROGRESS;
1247 _req->actual = 0;
1248
1249 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1250 __func__, ep->bEndpointAddress, _req->length);
1251
1252 if (ep->bEndpointAddress) {
1253 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1254
1255 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1256 ? S3C2410_UDC_IN_CSR1_REG
1257 : S3C2410_UDC_OUT_CSR1_REG);
1258 fifo_count = s3c2410_udc_fifo_count_out();
1259 } else {
1260 udc_write(0, S3C2410_UDC_INDEX_REG);
1261 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1262 fifo_count = s3c2410_udc_fifo_count_out();
1263 }
1264
1265 /* kickstart this i/o queue? */
1266 if (list_empty(&ep->queue) && !ep->halted) {
1267 if (ep->bEndpointAddress == 0 /* ep0 */) {
1268 switch (dev->ep0state) {
1269 case EP0_IN_DATA_PHASE:
1270 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1271 && s3c2410_udc_write_fifo(ep,
1272 req)) {
1273 dev->ep0state = EP0_IDLE;
1274 req = NULL;
1275 }
1276 break;
1277
1278 case EP0_OUT_DATA_PHASE:
1279 if ((!_req->length)
1280 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1281 && s3c2410_udc_read_fifo(ep,
1282 req))) {
1283 dev->ep0state = EP0_IDLE;
1284 req = NULL;
1285 }
1286 break;
1287
1288 default:
1289 local_irq_restore(flags);
1290 return -EL2HLT;
1291 }
1292 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1293 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1294 && s3c2410_udc_write_fifo(ep, req)) {
1295 req = NULL;
1296 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1297 && fifo_count
1298 && s3c2410_udc_read_fifo(ep, req)) {
1299 req = NULL;
1300 }
1301 }
1302
1303 /* pio or dma irq handler advances the queue. */
1304 if (likely (req != 0))
1305 list_add_tail(&req->queue, &ep->queue);
1306
1307 local_irq_restore(flags);
1308
1309 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1310 return 0;
1311 }
1312
1313 /*
1314 * s3c2410_udc_dequeue
1315 */
1316 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1317 {
1318 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1319 struct s3c2410_udc *udc;
1320 int retval = -EINVAL;
1321 unsigned long flags;
1322 struct s3c2410_request *req = NULL;
1323
1324 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1325
1326 if (!the_controller->driver)
1327 return -ESHUTDOWN;
1328
1329 if (!_ep || !_req)
1330 return retval;
1331
1332 udc = to_s3c2410_udc(ep->gadget);
1333
1334 local_irq_save (flags);
1335
1336 list_for_each_entry (req, &ep->queue, queue) {
1337 if (&req->req == _req) {
1338 list_del_init (&req->queue);
1339 _req->status = -ECONNRESET;
1340 retval = 0;
1341 break;
1342 }
1343 }
1344
1345 if (retval == 0) {
1346 dprintk(DEBUG_VERBOSE,
1347 "dequeued req %p from %s, len %d buf %p\n",
1348 req, _ep->name, _req->length, _req->buf);
1349
1350 s3c2410_udc_done(ep, req, -ECONNRESET);
1351 }
1352
1353 local_irq_restore (flags);
1354 return retval;
1355 }
1356
1357 /*
1358 * s3c2410_udc_set_halt
1359 */
1360 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1361 {
1362 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1363 u32 ep_csr = 0;
1364 unsigned long flags;
1365 u32 idx;
1366
1367 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1368 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1369 return -EINVAL;
1370 }
1371
1372 local_irq_save (flags);
1373
1374 idx = ep->bEndpointAddress & 0x7F;
1375
1376 if (idx == 0) {
1377 s3c2410_udc_set_ep0_ss(base_addr);
1378 s3c2410_udc_set_ep0_de_out(base_addr);
1379 } else {
1380 udc_write(idx, S3C2410_UDC_INDEX_REG);
1381 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1382 ? S3C2410_UDC_IN_CSR1_REG
1383 : S3C2410_UDC_OUT_CSR1_REG);
1384
1385 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1386 if (value)
1387 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1388 S3C2410_UDC_IN_CSR1_REG);
1389 else {
1390 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1391 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1392 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1393 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1394 }
1395 } else {
1396 if (value)
1397 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1398 S3C2410_UDC_OUT_CSR1_REG);
1399 else {
1400 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1401 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1402 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1403 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1404 }
1405 }
1406 }
1407
1408 ep->halted = value ? 1 : 0;
1409 local_irq_restore (flags);
1410
1411 return 0;
1412 }
1413
1414 static const struct usb_ep_ops s3c2410_ep_ops = {
1415 .enable = s3c2410_udc_ep_enable,
1416 .disable = s3c2410_udc_ep_disable,
1417
1418 .alloc_request = s3c2410_udc_alloc_request,
1419 .free_request = s3c2410_udc_free_request,
1420
1421 .queue = s3c2410_udc_queue,
1422 .dequeue = s3c2410_udc_dequeue,
1423
1424 .set_halt = s3c2410_udc_set_halt,
1425 };
1426
1427 /*------------------------- usb_gadget_ops ----------------------------------*/
1428
1429 /*
1430 * s3c2410_udc_get_frame
1431 */
1432 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1433 {
1434 int tmp;
1435
1436 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1437
1438 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1439 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1440 return tmp;
1441 }
1442
1443 /*
1444 * s3c2410_udc_wakeup
1445 */
1446 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1447 {
1448 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1449 return 0;
1450 }
1451
1452 /*
1453 * s3c2410_udc_set_selfpowered
1454 */
1455 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1456 {
1457 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1458
1459 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1460
1461 if (value)
1462 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1463 else
1464 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1465
1466 return 0;
1467 }
1468
1469 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1470 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1471
1472 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1473 {
1474 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1475
1476 if (udc_info && (udc_info->udc_command ||
1477 gpio_is_valid(udc_info->pullup_pin))) {
1478
1479 if (is_on)
1480 s3c2410_udc_enable(udc);
1481 else {
1482 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1483 if (udc->driver && udc->driver->disconnect)
1484 udc->driver->disconnect(&udc->gadget);
1485
1486 }
1487 s3c2410_udc_disable(udc);
1488 }
1489 }
1490 else
1491 return -EOPNOTSUPP;
1492
1493 return 0;
1494 }
1495
1496 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1497 {
1498 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1499
1500 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1501
1502 udc->vbus = (is_active != 0);
1503 s3c2410_udc_set_pullup(udc, is_active);
1504 return 0;
1505 }
1506
1507 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1508 {
1509 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1510
1511 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1512
1513 s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1514 return 0;
1515 }
1516
1517 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1518 {
1519 struct s3c2410_udc *dev = _dev;
1520 unsigned int value;
1521
1522 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1523
1524 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1525 if (udc_info->vbus_pin_inverted)
1526 value = !value;
1527
1528 if (value != dev->vbus)
1529 s3c2410_udc_vbus_session(&dev->gadget, value);
1530
1531 return IRQ_HANDLED;
1532 }
1533
1534 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1535 {
1536 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1537
1538 if (udc_info && udc_info->vbus_draw) {
1539 udc_info->vbus_draw(ma);
1540 return 0;
1541 }
1542
1543 return -ENOTSUPP;
1544 }
1545
1546 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1547 int (*bind)(struct usb_gadget *));
1548 static int s3c2410_udc_stop(struct usb_gadget_driver *driver);
1549
1550 static const struct usb_gadget_ops s3c2410_ops = {
1551 .get_frame = s3c2410_udc_get_frame,
1552 .wakeup = s3c2410_udc_wakeup,
1553 .set_selfpowered = s3c2410_udc_set_selfpowered,
1554 .pullup = s3c2410_udc_pullup,
1555 .vbus_session = s3c2410_udc_vbus_session,
1556 .vbus_draw = s3c2410_vbus_draw,
1557 .start = s3c2410_udc_start,
1558 .stop = s3c2410_udc_stop,
1559 };
1560
1561 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1562 {
1563 if (!udc_info)
1564 return;
1565
1566 if (udc_info->udc_command) {
1567 udc_info->udc_command(cmd);
1568 } else if (gpio_is_valid(udc_info->pullup_pin)) {
1569 int value;
1570
1571 switch (cmd) {
1572 case S3C2410_UDC_P_ENABLE:
1573 value = 1;
1574 break;
1575 case S3C2410_UDC_P_DISABLE:
1576 value = 0;
1577 break;
1578 default:
1579 return;
1580 }
1581 value ^= udc_info->pullup_pin_inverted;
1582
1583 gpio_set_value(udc_info->pullup_pin, value);
1584 }
1585 }
1586
1587 /*------------------------- gadget driver handling---------------------------*/
1588 /*
1589 * s3c2410_udc_disable
1590 */
1591 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1592 {
1593 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1594
1595 /* Disable all interrupts */
1596 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1597 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1598
1599 /* Clear the interrupt registers */
1600 udc_write(S3C2410_UDC_USBINT_RESET
1601 | S3C2410_UDC_USBINT_RESUME
1602 | S3C2410_UDC_USBINT_SUSPEND,
1603 S3C2410_UDC_USB_INT_REG);
1604
1605 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1606
1607 /* Good bye, cruel world */
1608 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1609
1610 /* Set speed to unknown */
1611 dev->gadget.speed = USB_SPEED_UNKNOWN;
1612 }
1613
1614 /*
1615 * s3c2410_udc_reinit
1616 */
1617 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1618 {
1619 u32 i;
1620
1621 /* device/ep0 records init */
1622 INIT_LIST_HEAD (&dev->gadget.ep_list);
1623 INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1624 dev->ep0state = EP0_IDLE;
1625
1626 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1627 struct s3c2410_ep *ep = &dev->ep[i];
1628
1629 if (i != 0)
1630 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1631
1632 ep->dev = dev;
1633 ep->desc = NULL;
1634 ep->ep.desc = NULL;
1635 ep->halted = 0;
1636 INIT_LIST_HEAD (&ep->queue);
1637 }
1638 }
1639
1640 /*
1641 * s3c2410_udc_enable
1642 */
1643 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1644 {
1645 int i;
1646
1647 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1648
1649 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1650 dev->gadget.speed = USB_SPEED_FULL;
1651
1652 /* Set MAXP for all endpoints */
1653 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1654 udc_write(i, S3C2410_UDC_INDEX_REG);
1655 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1656 S3C2410_UDC_MAXP_REG);
1657 }
1658
1659 /* Set default power state */
1660 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1661
1662 /* Enable reset and suspend interrupt interrupts */
1663 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1664 S3C2410_UDC_USB_INT_EN_REG);
1665
1666 /* Enable ep0 interrupt */
1667 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1668
1669 /* time to say "hello, world" */
1670 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1671 }
1672
1673 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1674 int (*bind)(struct usb_gadget *))
1675 {
1676 struct s3c2410_udc *udc = the_controller;
1677 int retval;
1678
1679 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1680
1681 /* Sanity checks */
1682 if (!udc)
1683 return -ENODEV;
1684
1685 if (udc->driver)
1686 return -EBUSY;
1687
1688 if (!bind || !driver->setup || driver->max_speed < USB_SPEED_FULL) {
1689 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1690 bind, driver->setup, driver->max_speed);
1691 return -EINVAL;
1692 }
1693 #if defined(MODULE)
1694 if (!driver->unbind) {
1695 printk(KERN_ERR "Invalid driver: no unbind method\n");
1696 return -EINVAL;
1697 }
1698 #endif
1699
1700 /* Hook the driver */
1701 udc->driver = driver;
1702 udc->gadget.dev.driver = &driver->driver;
1703
1704 /* Bind the driver */
1705 if ((retval = device_add(&udc->gadget.dev)) != 0) {
1706 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1707 goto register_error;
1708 }
1709
1710 dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1711 driver->driver.name);
1712
1713 if ((retval = bind(&udc->gadget)) != 0) {
1714 device_del(&udc->gadget.dev);
1715 goto register_error;
1716 }
1717
1718 /* Enable udc */
1719 s3c2410_udc_enable(udc);
1720
1721 return 0;
1722
1723 register_error:
1724 udc->driver = NULL;
1725 udc->gadget.dev.driver = NULL;
1726 return retval;
1727 }
1728
1729 static int s3c2410_udc_stop(struct usb_gadget_driver *driver)
1730 {
1731 struct s3c2410_udc *udc = the_controller;
1732
1733 if (!udc)
1734 return -ENODEV;
1735
1736 if (!driver || driver != udc->driver || !driver->unbind)
1737 return -EINVAL;
1738
1739 dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1740 driver->driver.name);
1741
1742 /* report disconnect */
1743 if (driver->disconnect)
1744 driver->disconnect(&udc->gadget);
1745
1746 driver->unbind(&udc->gadget);
1747
1748 device_del(&udc->gadget.dev);
1749 udc->driver = NULL;
1750
1751 /* Disable udc */
1752 s3c2410_udc_disable(udc);
1753
1754 return 0;
1755 }
1756
1757 /*---------------------------------------------------------------------------*/
1758 static struct s3c2410_udc memory = {
1759 .gadget = {
1760 .ops = &s3c2410_ops,
1761 .ep0 = &memory.ep[0].ep,
1762 .name = gadget_name,
1763 .dev = {
1764 .init_name = "gadget",
1765 },
1766 },
1767
1768 /* control endpoint */
1769 .ep[0] = {
1770 .num = 0,
1771 .ep = {
1772 .name = ep0name,
1773 .ops = &s3c2410_ep_ops,
1774 .maxpacket = EP0_FIFO_SIZE,
1775 },
1776 .dev = &memory,
1777 },
1778
1779 /* first group of endpoints */
1780 .ep[1] = {
1781 .num = 1,
1782 .ep = {
1783 .name = "ep1-bulk",
1784 .ops = &s3c2410_ep_ops,
1785 .maxpacket = EP_FIFO_SIZE,
1786 },
1787 .dev = &memory,
1788 .fifo_size = EP_FIFO_SIZE,
1789 .bEndpointAddress = 1,
1790 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1791 },
1792 .ep[2] = {
1793 .num = 2,
1794 .ep = {
1795 .name = "ep2-bulk",
1796 .ops = &s3c2410_ep_ops,
1797 .maxpacket = EP_FIFO_SIZE,
1798 },
1799 .dev = &memory,
1800 .fifo_size = EP_FIFO_SIZE,
1801 .bEndpointAddress = 2,
1802 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1803 },
1804 .ep[3] = {
1805 .num = 3,
1806 .ep = {
1807 .name = "ep3-bulk",
1808 .ops = &s3c2410_ep_ops,
1809 .maxpacket = EP_FIFO_SIZE,
1810 },
1811 .dev = &memory,
1812 .fifo_size = EP_FIFO_SIZE,
1813 .bEndpointAddress = 3,
1814 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1815 },
1816 .ep[4] = {
1817 .num = 4,
1818 .ep = {
1819 .name = "ep4-bulk",
1820 .ops = &s3c2410_ep_ops,
1821 .maxpacket = EP_FIFO_SIZE,
1822 },
1823 .dev = &memory,
1824 .fifo_size = EP_FIFO_SIZE,
1825 .bEndpointAddress = 4,
1826 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1827 }
1828
1829 };
1830
1831 /*
1832 * probe - binds to the platform device
1833 */
1834 static int s3c2410_udc_probe(struct platform_device *pdev)
1835 {
1836 struct s3c2410_udc *udc = &memory;
1837 struct device *dev = &pdev->dev;
1838 int retval;
1839 int irq;
1840
1841 dev_dbg(dev, "%s()\n", __func__);
1842
1843 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1844 if (IS_ERR(usb_bus_clock)) {
1845 dev_err(dev, "failed to get usb bus clock source\n");
1846 return PTR_ERR(usb_bus_clock);
1847 }
1848
1849 clk_enable(usb_bus_clock);
1850
1851 udc_clock = clk_get(NULL, "usb-device");
1852 if (IS_ERR(udc_clock)) {
1853 dev_err(dev, "failed to get udc clock source\n");
1854 return PTR_ERR(udc_clock);
1855 }
1856
1857 clk_enable(udc_clock);
1858
1859 mdelay(10);
1860
1861 dev_dbg(dev, "got and enabled clocks\n");
1862
1863 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1864 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1865 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1866 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1867 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1868 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1869 }
1870
1871 spin_lock_init (&udc->lock);
1872 udc_info = pdev->dev.platform_data;
1873
1874 rsrc_start = S3C2410_PA_USBDEV;
1875 rsrc_len = S3C24XX_SZ_USBDEV;
1876
1877 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1878 return -EBUSY;
1879
1880 base_addr = ioremap(rsrc_start, rsrc_len);
1881 if (!base_addr) {
1882 retval = -ENOMEM;
1883 goto err_mem;
1884 }
1885
1886 device_initialize(&udc->gadget.dev);
1887 udc->gadget.dev.parent = &pdev->dev;
1888 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1889
1890 the_controller = udc;
1891 platform_set_drvdata(pdev, udc);
1892
1893 s3c2410_udc_disable(udc);
1894 s3c2410_udc_reinit(udc);
1895
1896 /* irq setup after old hardware state is cleaned up */
1897 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1898 0, gadget_name, udc);
1899
1900 if (retval != 0) {
1901 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1902 retval = -EBUSY;
1903 goto err_map;
1904 }
1905
1906 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1907
1908 if (udc_info && udc_info->vbus_pin > 0) {
1909 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1910 if (retval < 0) {
1911 dev_err(dev, "cannot claim vbus pin\n");
1912 goto err_int;
1913 }
1914
1915 irq = gpio_to_irq(udc_info->vbus_pin);
1916 if (irq < 0) {
1917 dev_err(dev, "no irq for gpio vbus pin\n");
1918 goto err_gpio_claim;
1919 }
1920
1921 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1922 IRQF_TRIGGER_RISING
1923 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1924 gadget_name, udc);
1925
1926 if (retval != 0) {
1927 dev_err(dev, "can't get vbus irq %d, err %d\n",
1928 irq, retval);
1929 retval = -EBUSY;
1930 goto err_gpio_claim;
1931 }
1932
1933 dev_dbg(dev, "got irq %i\n", irq);
1934 } else {
1935 udc->vbus = 1;
1936 }
1937
1938 if (udc_info && !udc_info->udc_command &&
1939 gpio_is_valid(udc_info->pullup_pin)) {
1940
1941 retval = gpio_request_one(udc_info->pullup_pin,
1942 udc_info->vbus_pin_inverted ?
1943 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1944 "udc pullup");
1945 if (retval)
1946 goto err_vbus_irq;
1947 }
1948
1949 retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1950 if (retval)
1951 goto err_add_udc;
1952
1953 if (s3c2410_udc_debugfs_root) {
1954 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1955 s3c2410_udc_debugfs_root,
1956 udc, &s3c2410_udc_debugfs_fops);
1957 if (!udc->regs_info)
1958 dev_warn(dev, "debugfs file creation failed\n");
1959 }
1960
1961 dev_dbg(dev, "probe ok\n");
1962
1963 return 0;
1964
1965 err_add_udc:
1966 if (udc_info && !udc_info->udc_command &&
1967 gpio_is_valid(udc_info->pullup_pin))
1968 gpio_free(udc_info->pullup_pin);
1969 err_vbus_irq:
1970 if (udc_info && udc_info->vbus_pin > 0)
1971 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1972 err_gpio_claim:
1973 if (udc_info && udc_info->vbus_pin > 0)
1974 gpio_free(udc_info->vbus_pin);
1975 err_int:
1976 free_irq(IRQ_USBD, udc);
1977 err_map:
1978 iounmap(base_addr);
1979 err_mem:
1980 release_mem_region(rsrc_start, rsrc_len);
1981
1982 return retval;
1983 }
1984
1985 /*
1986 * s3c2410_udc_remove
1987 */
1988 static int s3c2410_udc_remove(struct platform_device *pdev)
1989 {
1990 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1991 unsigned int irq;
1992
1993 dev_dbg(&pdev->dev, "%s()\n", __func__);
1994
1995 usb_del_gadget_udc(&udc->gadget);
1996 if (udc->driver)
1997 return -EBUSY;
1998
1999 debugfs_remove(udc->regs_info);
2000
2001 if (udc_info && !udc_info->udc_command &&
2002 gpio_is_valid(udc_info->pullup_pin))
2003 gpio_free(udc_info->pullup_pin);
2004
2005 if (udc_info && udc_info->vbus_pin > 0) {
2006 irq = gpio_to_irq(udc_info->vbus_pin);
2007 free_irq(irq, udc);
2008 }
2009
2010 free_irq(IRQ_USBD, udc);
2011
2012 iounmap(base_addr);
2013 release_mem_region(rsrc_start, rsrc_len);
2014
2015 platform_set_drvdata(pdev, NULL);
2016
2017 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2018 clk_disable(udc_clock);
2019 clk_put(udc_clock);
2020 udc_clock = NULL;
2021 }
2022
2023 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2024 clk_disable(usb_bus_clock);
2025 clk_put(usb_bus_clock);
2026 usb_bus_clock = NULL;
2027 }
2028
2029 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2030 return 0;
2031 }
2032
2033 #ifdef CONFIG_PM
2034 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2035 {
2036 s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2037
2038 return 0;
2039 }
2040
2041 static int s3c2410_udc_resume(struct platform_device *pdev)
2042 {
2043 s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2044
2045 return 0;
2046 }
2047 #else
2048 #define s3c2410_udc_suspend NULL
2049 #define s3c2410_udc_resume NULL
2050 #endif
2051
2052 static const struct platform_device_id s3c_udc_ids[] = {
2053 { "s3c2410-usbgadget", },
2054 { "s3c2440-usbgadget", },
2055 { }
2056 };
2057 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
2058
2059 static struct platform_driver udc_driver_24x0 = {
2060 .driver = {
2061 .name = "s3c24x0-usbgadget",
2062 .owner = THIS_MODULE,
2063 },
2064 .probe = s3c2410_udc_probe,
2065 .remove = s3c2410_udc_remove,
2066 .suspend = s3c2410_udc_suspend,
2067 .resume = s3c2410_udc_resume,
2068 .id_table = s3c_udc_ids,
2069 };
2070
2071 static int __init udc_init(void)
2072 {
2073 int retval;
2074
2075 dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2076
2077 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2078 if (IS_ERR(s3c2410_udc_debugfs_root)) {
2079 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2080 gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2081 s3c2410_udc_debugfs_root = NULL;
2082 }
2083
2084 retval = platform_driver_register(&udc_driver_24x0);
2085 if (retval)
2086 goto err;
2087
2088 return 0;
2089
2090 err:
2091 debugfs_remove(s3c2410_udc_debugfs_root);
2092 return retval;
2093 }
2094
2095 static void __exit udc_exit(void)
2096 {
2097 platform_driver_unregister(&udc_driver_24x0);
2098 debugfs_remove(s3c2410_udc_debugfs_root);
2099 }
2100
2101 module_init(udc_init);
2102 module_exit(udc_exit);
2103
2104 MODULE_AUTHOR(DRIVER_AUTHOR);
2105 MODULE_DESCRIPTION(DRIVER_DESC);
2106 MODULE_VERSION(DRIVER_VERSION);
2107 MODULE_LICENSE("GPL");