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proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / usb / gadget / s3c2410_udc.c
blobc2448950a8d8031dcd856a0cbafe3f6710f0a617
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 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28 #include <linux/ioport.h>
29 #include <linux/sched.h>
30 #include <linux/slab.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/timer.h>
34 #include <linux/list.h>
35 #include <linux/interrupt.h>
36 #include <linux/platform_device.h>
37 #include <linux/clk.h>
38 #include <linux/gpio.h>
39
40 #include <linux/debugfs.h>
41 #include <linux/seq_file.h>
42
43 #include <linux/usb.h>
44 #include <linux/usb/gadget.h>
45
46 #include <asm/byteorder.h>
47 #include <asm/io.h>
48 #include <asm/irq.h>
49 #include <asm/system.h>
50 #include <asm/unaligned.h>
51 #include <mach/irqs.h>
52
53 #include <mach/hardware.h>
54
55 #include <plat/regs-udc.h>
56 #include <plat/udc.h>
57
58
59 #include "s3c2410_udc.h"
60
61 #define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
62 #define DRIVER_VERSION "29 Apr 2007"
63 #define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
64 "Arnaud Patard <arnaud.patard@rtp-net.org>"
65
66 static const char gadget_name[] = "s3c2410_udc";
67 static const char driver_desc[] = DRIVER_DESC;
68
69 static struct s3c2410_udc *the_controller;
70 static struct clk *udc_clock;
71 static struct clk *usb_bus_clock;
72 static void __iomem *base_addr;
73 static u64 rsrc_start;
74 static u64 rsrc_len;
75 static struct dentry *s3c2410_udc_debugfs_root;
76
77 static inline u32 udc_read(u32 reg)
78 {
79 return readb(base_addr + reg);
80 }
81
82 static inline void udc_write(u32 value, u32 reg)
83 {
84 writeb(value, base_addr + reg);
85 }
86
87 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
88 {
89 writeb(value, base + reg);
90 }
91
92 static struct s3c2410_udc_mach_info *udc_info;
93
94 /*************************** DEBUG FUNCTION ***************************/
95 #define DEBUG_NORMAL 1
96 #define DEBUG_VERBOSE 2
97
98 #ifdef CONFIG_USB_S3C2410_DEBUG
99 #define USB_S3C2410_DEBUG_LEVEL 0
100
101 static uint32_t s3c2410_ticks = 0;
102
103 static int dprintk(int level, const char *fmt, ...)
104 {
105 static char printk_buf[1024];
106 static long prevticks;
107 static int invocation;
108 va_list args;
109 int len;
110
111 if (level > USB_S3C2410_DEBUG_LEVEL)
112 return 0;
113
114 if (s3c2410_ticks != prevticks) {
115 prevticks = s3c2410_ticks;
116 invocation = 0;
117 }
118
119 len = scnprintf(printk_buf,
120 sizeof(printk_buf), "%1lu.%02d USB: ",
121 prevticks, invocation++);
122
123 va_start(args, fmt);
124 len = vscnprintf(printk_buf+len,
125 sizeof(printk_buf)-len, fmt, args);
126 va_end(args);
127
128 return printk(KERN_DEBUG "%s", printk_buf);
129 }
130 #else
131 static int dprintk(int level, const char *fmt, ...)
132 {
133 return 0;
134 }
135 #endif
136 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
137 {
138 u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
139 u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
140 u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
141 u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
142
143 addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
144 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
145 ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
146 usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
147 ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
148 usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
149 udc_write(0, S3C2410_UDC_INDEX_REG);
150 ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
151 udc_write(1, S3C2410_UDC_INDEX_REG);
152 ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
153 ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
154 ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
155 ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
156 udc_write(2, S3C2410_UDC_INDEX_REG);
157 ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
158 ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
159 ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
160 ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
161
162 seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
163 "PWR_REG : 0x%04X\n"
164 "EP_INT_REG : 0x%04X\n"
165 "USB_INT_REG : 0x%04X\n"
166 "EP_INT_EN_REG : 0x%04X\n"
167 "USB_INT_EN_REG : 0x%04X\n"
168 "EP0_CSR : 0x%04X\n"
169 "EP1_I_CSR1 : 0x%04X\n"
170 "EP1_I_CSR2 : 0x%04X\n"
171 "EP1_O_CSR1 : 0x%04X\n"
172 "EP1_O_CSR2 : 0x%04X\n"
173 "EP2_I_CSR1 : 0x%04X\n"
174 "EP2_I_CSR2 : 0x%04X\n"
175 "EP2_O_CSR1 : 0x%04X\n"
176 "EP2_O_CSR2 : 0x%04X\n",
177 addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
178 ep_int_en_reg, usb_int_en_reg, ep0_csr,
179 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
180 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
181 );
182
183 return 0;
184 }
185
186 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
187 struct file *file)
188 {
189 return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
190 }
191
192 static const struct file_operations s3c2410_udc_debugfs_fops = {
193 .open = s3c2410_udc_debugfs_fops_open,
194 .read = seq_read,
195 .llseek = seq_lseek,
196 .release = single_release,
197 .owner = THIS_MODULE,
198 };
199
200 /* io macros */
201
202 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
203 {
204 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
205 udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
206 S3C2410_UDC_EP0_CSR_REG);
207 }
208
209 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
210 {
211 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
212 writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
213 }
214
215 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
216 {
217 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
218 udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
219 }
220
221 static inline void s3c2410_udc_set_ep0_ipr(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, S3C2410_UDC_EP0_CSR_REG);
225 }
226
227 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
228 {
229 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
230 udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
231 }
232
233 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
234 {
235 udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
236 udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
237 }
238
239 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
240 {
241 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
242
243 udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
244 | S3C2410_UDC_EP0_CSR_DE),
245 S3C2410_UDC_EP0_CSR_REG);
246 }
247
248 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
249 {
250 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
251 udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
252 | S3C2410_UDC_EP0_CSR_SSE),
253 S3C2410_UDC_EP0_CSR_REG);
254 }
255
256 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
257 {
258 udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
259 udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
260 | S3C2410_UDC_EP0_CSR_DE),
261 S3C2410_UDC_EP0_CSR_REG);
262 }
263
264 /*------------------------- I/O ----------------------------------*/
265
266 /*
267 * s3c2410_udc_done
268 */
269 static void s3c2410_udc_done(struct s3c2410_ep *ep,
270 struct s3c2410_request *req, int status)
271 {
272 unsigned halted = ep->halted;
273
274 list_del_init(&req->queue);
275
276 if (likely (req->req.status == -EINPROGRESS))
277 req->req.status = status;
278 else
279 status = req->req.status;
280
281 ep->halted = 1;
282 req->req.complete(&ep->ep, &req->req);
283 ep->halted = halted;
284 }
285
286 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
287 struct s3c2410_ep *ep, int status)
288 {
289 /* Sanity check */
290 if (&ep->queue == NULL)
291 return;
292
293 while (!list_empty (&ep->queue)) {
294 struct s3c2410_request *req;
295 req = list_entry (ep->queue.next, struct s3c2410_request,
296 queue);
297 s3c2410_udc_done(ep, req, status);
298 }
299 }
300
301 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
302 {
303 unsigned i;
304
305 /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
306 * fifos, and pending transactions mustn't be continued in any case.
307 */
308
309 for (i = 1; i < S3C2410_ENDPOINTS; i++)
310 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
311 }
312
313 static inline int s3c2410_udc_fifo_count_out(void)
314 {
315 int tmp;
316
317 tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
318 tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
319 return tmp;
320 }
321
322 /*
323 * s3c2410_udc_write_packet
324 */
325 static inline int s3c2410_udc_write_packet(int fifo,
326 struct s3c2410_request *req,
327 unsigned max)
328 {
329 unsigned len = min(req->req.length - req->req.actual, max);
330 u8 *buf = req->req.buf + req->req.actual;
331
332 prefetch(buf);
333
334 dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
335 req->req.actual, req->req.length, len, req->req.actual + len);
336
337 req->req.actual += len;
338
339 udelay(5);
340 writesb(base_addr + fifo, buf, len);
341 return len;
342 }
343
344 /*
345 * s3c2410_udc_write_fifo
346 *
347 * return: 0 = still running, 1 = completed, negative = errno
348 */
349 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
350 struct s3c2410_request *req)
351 {
352 unsigned count;
353 int is_last;
354 u32 idx;
355 int fifo_reg;
356 u32 ep_csr;
357
358 idx = ep->bEndpointAddress & 0x7F;
359 switch (idx) {
360 default:
361 idx = 0;
362 case 0:
363 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
364 break;
365 case 1:
366 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
367 break;
368 case 2:
369 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
370 break;
371 case 3:
372 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
373 break;
374 case 4:
375 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
376 break;
377 }
378
379 count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
380
381 /* last packet is often short (sometimes a zlp) */
382 if (count != ep->ep.maxpacket)
383 is_last = 1;
384 else if (req->req.length != req->req.actual || req->req.zero)
385 is_last = 0;
386 else
387 is_last = 2;
388
389 /* Only ep0 debug messages are interesting */
390 if (idx == 0)
391 dprintk(DEBUG_NORMAL,
392 "Written ep%d %d.%d of %d b [last %d,z %d]\n",
393 idx, count, req->req.actual, req->req.length,
394 is_last, req->req.zero);
395
396 if (is_last) {
397 /* The order is important. It prevents sending 2 packets
398 * at the same time */
399
400 if (idx == 0) {
401 /* Reset signal => no need to say 'data sent' */
402 if (! (udc_read(S3C2410_UDC_USB_INT_REG)
403 & S3C2410_UDC_USBINT_RESET))
404 s3c2410_udc_set_ep0_de_in(base_addr);
405 ep->dev->ep0state=EP0_IDLE;
406 } else {
407 udc_write(idx, S3C2410_UDC_INDEX_REG);
408 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
409 udc_write(idx, S3C2410_UDC_INDEX_REG);
410 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
411 S3C2410_UDC_IN_CSR1_REG);
412 }
413
414 s3c2410_udc_done(ep, req, 0);
415 is_last = 1;
416 } else {
417 if (idx == 0) {
418 /* Reset signal => no need to say 'data sent' */
419 if (! (udc_read(S3C2410_UDC_USB_INT_REG)
420 & S3C2410_UDC_USBINT_RESET))
421 s3c2410_udc_set_ep0_ipr(base_addr);
422 } else {
423 udc_write(idx, S3C2410_UDC_INDEX_REG);
424 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
425 udc_write(idx, S3C2410_UDC_INDEX_REG);
426 udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
427 S3C2410_UDC_IN_CSR1_REG);
428 }
429 }
430
431 return is_last;
432 }
433
434 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
435 struct s3c2410_request *req, unsigned avail)
436 {
437 unsigned len;
438
439 len = min(req->req.length - req->req.actual, avail);
440 req->req.actual += len;
441
442 readsb(fifo + base_addr, buf, len);
443 return len;
444 }
445
446 /*
447 * return: 0 = still running, 1 = queue empty, negative = errno
448 */
449 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
450 struct s3c2410_request *req)
451 {
452 u8 *buf;
453 u32 ep_csr;
454 unsigned bufferspace;
455 int is_last=1;
456 unsigned avail;
457 int fifo_count = 0;
458 u32 idx;
459 int fifo_reg;
460
461 idx = ep->bEndpointAddress & 0x7F;
462
463 switch (idx) {
464 default:
465 idx = 0;
466 case 0:
467 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
468 break;
469 case 1:
470 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
471 break;
472 case 2:
473 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
474 break;
475 case 3:
476 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
477 break;
478 case 4:
479 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
480 break;
481 }
482
483 if (!req->req.length)
484 return 1;
485
486 buf = req->req.buf + req->req.actual;
487 bufferspace = req->req.length - req->req.actual;
488 if (!bufferspace) {
489 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
490 return -1;
491 }
492
493 udc_write(idx, S3C2410_UDC_INDEX_REG);
494
495 fifo_count = s3c2410_udc_fifo_count_out();
496 dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
497
498 if (fifo_count > ep->ep.maxpacket)
499 avail = ep->ep.maxpacket;
500 else
501 avail = fifo_count;
502
503 fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
504
505 /* checking this with ep0 is not accurate as we already
506 * read a control request
507 **/
508 if (idx != 0 && fifo_count < ep->ep.maxpacket) {
509 is_last = 1;
510 /* overflowed this request? flush extra data */
511 if (fifo_count != avail)
512 req->req.status = -EOVERFLOW;
513 } else {
514 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
515 }
516
517 udc_write(idx, S3C2410_UDC_INDEX_REG);
518 fifo_count = s3c2410_udc_fifo_count_out();
519
520 /* Only ep0 debug messages are interesting */
521 if (idx == 0)
522 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
523 __func__, fifo_count,is_last);
524
525 if (is_last) {
526 if (idx == 0) {
527 s3c2410_udc_set_ep0_de_out(base_addr);
528 ep->dev->ep0state = EP0_IDLE;
529 } else {
530 udc_write(idx, S3C2410_UDC_INDEX_REG);
531 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
532 udc_write(idx, S3C2410_UDC_INDEX_REG);
533 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
534 S3C2410_UDC_OUT_CSR1_REG);
535 }
536
537 s3c2410_udc_done(ep, req, 0);
538 } else {
539 if (idx == 0) {
540 s3c2410_udc_clear_ep0_opr(base_addr);
541 } else {
542 udc_write(idx, S3C2410_UDC_INDEX_REG);
543 ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
544 udc_write(idx, S3C2410_UDC_INDEX_REG);
545 udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
546 S3C2410_UDC_OUT_CSR1_REG);
547 }
548 }
549
550 return is_last;
551 }
552
553 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
554 {
555 unsigned char *outbuf = (unsigned char*)crq;
556 int bytes_read = 0;
557
558 udc_write(0, S3C2410_UDC_INDEX_REG);
559
560 bytes_read = s3c2410_udc_fifo_count_out();
561
562 dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
563
564 if (bytes_read > sizeof(struct usb_ctrlrequest))
565 bytes_read = sizeof(struct usb_ctrlrequest);
566
567 readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
568
569 dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
570 bytes_read, crq->bRequest, crq->bRequestType,
571 crq->wValue, crq->wIndex, crq->wLength);
572
573 return bytes_read;
574 }
575
576 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
577 struct usb_ctrlrequest *crq)
578 {
579 u16 status = 0;
580 u8 ep_num = crq->wIndex & 0x7F;
581 u8 is_in = crq->wIndex & USB_DIR_IN;
582
583 switch (crq->bRequestType & USB_RECIP_MASK) {
584 case USB_RECIP_INTERFACE:
585 break;
586
587 case USB_RECIP_DEVICE:
588 status = dev->devstatus;
589 break;
590
591 case USB_RECIP_ENDPOINT:
592 if (ep_num > 4 || crq->wLength > 2)
593 return 1;
594
595 if (ep_num == 0) {
596 udc_write(0, S3C2410_UDC_INDEX_REG);
597 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
598 status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
599 } else {
600 udc_write(ep_num, S3C2410_UDC_INDEX_REG);
601 if (is_in) {
602 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
603 status = status & S3C2410_UDC_ICSR1_SENDSTL;
604 } else {
605 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
606 status = status & S3C2410_UDC_OCSR1_SENDSTL;
607 }
608 }
609
610 status = status ? 1 : 0;
611 break;
612
613 default:
614 return 1;
615 }
616
617 /* Seems to be needed to get it working. ouch :( */
618 udelay(5);
619 udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
620 udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
621 s3c2410_udc_set_ep0_de_in(base_addr);
622
623 return 0;
624 }
625 /*------------------------- usb state machine -------------------------------*/
626 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
627
628 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
629 struct s3c2410_ep *ep,
630 struct usb_ctrlrequest *crq,
631 u32 ep0csr)
632 {
633 int len, ret, tmp;
634
635 /* start control request? */
636 if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
637 return;
638
639 s3c2410_udc_nuke(dev, ep, -EPROTO);
640
641 len = s3c2410_udc_read_fifo_crq(crq);
642 if (len != sizeof(*crq)) {
643 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
644 " wanted %d bytes got %d. Stalling out...\n",
645 sizeof(*crq), len);
646 s3c2410_udc_set_ep0_ss(base_addr);
647 return;
648 }
649
650 dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
651 crq->bRequest, crq->bRequestType, crq->wLength);
652
653 /* cope with automagic for some standard requests. */
654 dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
655 == USB_TYPE_STANDARD;
656 dev->req_config = 0;
657 dev->req_pending = 1;
658
659 switch (crq->bRequest) {
660 case USB_REQ_SET_CONFIGURATION:
661 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
662
663 if (crq->bRequestType == USB_RECIP_DEVICE) {
664 dev->req_config = 1;
665 s3c2410_udc_set_ep0_de_out(base_addr);
666 }
667 break;
668
669 case USB_REQ_SET_INTERFACE:
670 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
671
672 if (crq->bRequestType == USB_RECIP_INTERFACE) {
673 dev->req_config = 1;
674 s3c2410_udc_set_ep0_de_out(base_addr);
675 }
676 break;
677
678 case USB_REQ_SET_ADDRESS:
679 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
680
681 if (crq->bRequestType == USB_RECIP_DEVICE) {
682 tmp = crq->wValue & 0x7F;
683 dev->address = tmp;
684 udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
685 S3C2410_UDC_FUNC_ADDR_REG);
686 s3c2410_udc_set_ep0_de_out(base_addr);
687 return;
688 }
689 break;
690
691 case USB_REQ_GET_STATUS:
692 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
693 s3c2410_udc_clear_ep0_opr(base_addr);
694
695 if (dev->req_std) {
696 if (!s3c2410_udc_get_status(dev, crq)) {
697 return;
698 }
699 }
700 break;
701
702 case USB_REQ_CLEAR_FEATURE:
703 s3c2410_udc_clear_ep0_opr(base_addr);
704
705 if (crq->bRequestType != USB_RECIP_ENDPOINT)
706 break;
707
708 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
709 break;
710
711 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
712 s3c2410_udc_set_ep0_de_out(base_addr);
713 return;
714
715 case USB_REQ_SET_FEATURE:
716 s3c2410_udc_clear_ep0_opr(base_addr);
717
718 if (crq->bRequestType != USB_RECIP_ENDPOINT)
719 break;
720
721 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
722 break;
723
724 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
725 s3c2410_udc_set_ep0_de_out(base_addr);
726 return;
727
728 default:
729 s3c2410_udc_clear_ep0_opr(base_addr);
730 break;
731 }
732
733 if (crq->bRequestType & USB_DIR_IN)
734 dev->ep0state = EP0_IN_DATA_PHASE;
735 else
736 dev->ep0state = EP0_OUT_DATA_PHASE;
737
738 if (!dev->driver)
739 return;
740
741 /* deliver the request to the gadget driver */
742 ret = dev->driver->setup(&dev->gadget, crq);
743 if (ret < 0) {
744 if (dev->req_config) {
745 dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
746 crq->bRequest, ret);
747 return;
748 }
749
750 if (ret == -EOPNOTSUPP)
751 dprintk(DEBUG_NORMAL, "Operation not supported\n");
752 else
753 dprintk(DEBUG_NORMAL,
754 "dev->driver->setup failed. (%d)\n", ret);
755
756 udelay(5);
757 s3c2410_udc_set_ep0_ss(base_addr);
758 s3c2410_udc_set_ep0_de_out(base_addr);
759 dev->ep0state = EP0_IDLE;
760 /* deferred i/o == no response yet */
761 } else if (dev->req_pending) {
762 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
763 dev->req_pending=0;
764 }
765
766 dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
767 }
768
769 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
770 {
771 u32 ep0csr;
772 struct s3c2410_ep *ep = &dev->ep[0];
773 struct s3c2410_request *req;
774 struct usb_ctrlrequest crq;
775
776 if (list_empty(&ep->queue))
777 req = NULL;
778 else
779 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
780
781 /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
782 * S3C2410_UDC_EP0_CSR_REG when index is zero */
783
784 udc_write(0, S3C2410_UDC_INDEX_REG);
785 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
786
787 dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
788 ep0csr, ep0states[dev->ep0state]);
789
790 /* clear stall status */
791 if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
792 s3c2410_udc_nuke(dev, ep, -EPIPE);
793 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
794 s3c2410_udc_clear_ep0_sst(base_addr);
795 dev->ep0state = EP0_IDLE;
796 return;
797 }
798
799 /* clear setup end */
800 if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
801 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
802 s3c2410_udc_nuke(dev, ep, 0);
803 s3c2410_udc_clear_ep0_se(base_addr);
804 dev->ep0state = EP0_IDLE;
805 }
806
807 switch (dev->ep0state) {
808 case EP0_IDLE:
809 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
810 break;
811
812 case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
813 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
814 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
815 s3c2410_udc_write_fifo(ep, req);
816 }
817 break;
818
819 case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
820 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
821 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
822 s3c2410_udc_read_fifo(ep,req);
823 }
824 break;
825
826 case EP0_END_XFER:
827 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
828 dev->ep0state = EP0_IDLE;
829 break;
830
831 case EP0_STALL:
832 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
833 dev->ep0state = EP0_IDLE;
834 break;
835 }
836 }
837
838 /*
839 * handle_ep - Manage I/O endpoints
840 */
841
842 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
843 {
844 struct s3c2410_request *req;
845 int is_in = ep->bEndpointAddress & USB_DIR_IN;
846 u32 ep_csr1;
847 u32 idx;
848
849 if (likely (!list_empty(&ep->queue)))
850 req = list_entry(ep->queue.next,
851 struct s3c2410_request, queue);
852 else
853 req = NULL;
854
855 idx = ep->bEndpointAddress & 0x7F;
856
857 if (is_in) {
858 udc_write(idx, S3C2410_UDC_INDEX_REG);
859 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
860 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
861 idx, ep_csr1, req ? 1 : 0);
862
863 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
864 dprintk(DEBUG_VERBOSE, "st\n");
865 udc_write(idx, S3C2410_UDC_INDEX_REG);
866 udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
867 S3C2410_UDC_IN_CSR1_REG);
868 return;
869 }
870
871 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
872 s3c2410_udc_write_fifo(ep,req);
873 }
874 } else {
875 udc_write(idx, S3C2410_UDC_INDEX_REG);
876 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
877 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
878
879 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
880 udc_write(idx, S3C2410_UDC_INDEX_REG);
881 udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
882 S3C2410_UDC_OUT_CSR1_REG);
883 return;
884 }
885
886 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
887 s3c2410_udc_read_fifo(ep,req);
888 }
889 }
890 }
891
892 #include <mach/regs-irq.h>
893
894 /*
895 * s3c2410_udc_irq - interrupt handler
896 */
897 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
898 {
899 struct s3c2410_udc *dev = _dev;
900 int usb_status;
901 int usbd_status;
902 int pwr_reg;
903 int ep0csr;
904 int i;
905 u32 idx;
906 unsigned long flags;
907
908 spin_lock_irqsave(&dev->lock, flags);
909
910 /* Driver connected ? */
911 if (!dev->driver) {
912 /* Clear interrupts */
913 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
914 S3C2410_UDC_USB_INT_REG);
915 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
916 S3C2410_UDC_EP_INT_REG);
917 }
918
919 /* Save index */
920 idx = udc_read(S3C2410_UDC_INDEX_REG);
921
922 /* Read status registers */
923 usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
924 usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
925 pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
926
927 udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
928 ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
929
930 dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
931 usb_status, usbd_status, pwr_reg, ep0csr);
932
933 /*
934 * Now, handle interrupts. There's two types :
935 * - Reset, Resume, Suspend coming -> usb_int_reg
936 * - EP -> ep_int_reg
937 */
938
939 /* RESET */
940 if (usb_status & S3C2410_UDC_USBINT_RESET) {
941 /* two kind of reset :
942 * - reset start -> pwr reg = 8
943 * - reset end -> pwr reg = 0
944 **/
945 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
946 ep0csr, pwr_reg);
947
948 dev->gadget.speed = USB_SPEED_UNKNOWN;
949 udc_write(0x00, S3C2410_UDC_INDEX_REG);
950 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
951 S3C2410_UDC_MAXP_REG);
952 dev->address = 0;
953
954 dev->ep0state = EP0_IDLE;
955 dev->gadget.speed = USB_SPEED_FULL;
956
957 /* clear interrupt */
958 udc_write(S3C2410_UDC_USBINT_RESET,
959 S3C2410_UDC_USB_INT_REG);
960
961 udc_write(idx, S3C2410_UDC_INDEX_REG);
962 spin_unlock_irqrestore(&dev->lock, flags);
963 return IRQ_HANDLED;
964 }
965
966 /* RESUME */
967 if (usb_status & S3C2410_UDC_USBINT_RESUME) {
968 dprintk(DEBUG_NORMAL, "USB resume\n");
969
970 /* clear interrupt */
971 udc_write(S3C2410_UDC_USBINT_RESUME,
972 S3C2410_UDC_USB_INT_REG);
973
974 if (dev->gadget.speed != USB_SPEED_UNKNOWN
975 && dev->driver
976 && dev->driver->resume)
977 dev->driver->resume(&dev->gadget);
978 }
979
980 /* SUSPEND */
981 if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
982 dprintk(DEBUG_NORMAL, "USB suspend\n");
983
984 /* clear interrupt */
985 udc_write(S3C2410_UDC_USBINT_SUSPEND,
986 S3C2410_UDC_USB_INT_REG);
987
988 if (dev->gadget.speed != USB_SPEED_UNKNOWN
989 && dev->driver
990 && dev->driver->suspend)
991 dev->driver->suspend(&dev->gadget);
992
993 dev->ep0state = EP0_IDLE;
994 }
995
996 /* EP */
997 /* control traffic */
998 /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
999 * generate an interrupt
1000 */
1001 if (usbd_status & S3C2410_UDC_INT_EP0) {
1002 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1003 /* Clear the interrupt bit by setting it to 1 */
1004 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1005 s3c2410_udc_handle_ep0(dev);
1006 }
1007
1008 /* endpoint data transfers */
1009 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1010 u32 tmp = 1 << i;
1011 if (usbd_status & tmp) {
1012 dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1013
1014 /* Clear the interrupt bit by setting it to 1 */
1015 udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1016 s3c2410_udc_handle_ep(&dev->ep[i]);
1017 }
1018 }
1019
1020 dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1021
1022 /* Restore old index */
1023 udc_write(idx, S3C2410_UDC_INDEX_REG);
1024
1025 spin_unlock_irqrestore(&dev->lock, flags);
1026
1027 return IRQ_HANDLED;
1028 }
1029 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1030
1031 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1032 {
1033 return container_of(ep, struct s3c2410_ep, ep);
1034 }
1035
1036 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1037 {
1038 return container_of(gadget, struct s3c2410_udc, gadget);
1039 }
1040
1041 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1042 {
1043 return container_of(req, struct s3c2410_request, req);
1044 }
1045
1046 /*
1047 * s3c2410_udc_ep_enable
1048 */
1049 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1050 const struct usb_endpoint_descriptor *desc)
1051 {
1052 struct s3c2410_udc *dev;
1053 struct s3c2410_ep *ep;
1054 u32 max, tmp;
1055 unsigned long flags;
1056 u32 csr1,csr2;
1057 u32 int_en_reg;
1058
1059 ep = to_s3c2410_ep(_ep);
1060
1061 if (!_ep || !desc || ep->desc
1062 || _ep->name == ep0name
1063 || desc->bDescriptorType != USB_DT_ENDPOINT)
1064 return -EINVAL;
1065
1066 dev = ep->dev;
1067 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1068 return -ESHUTDOWN;
1069
1070 max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1071
1072 local_irq_save (flags);
1073 _ep->maxpacket = max & 0x7ff;
1074 ep->desc = desc;
1075 ep->halted = 0;
1076 ep->bEndpointAddress = desc->bEndpointAddress;
1077
1078 /* set max packet */
1079 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1080 udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1081
1082 /* set type, direction, address; reset fifo counters */
1083 if (desc->bEndpointAddress & USB_DIR_IN) {
1084 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1085 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1086
1087 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1088 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1089 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1090 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1091 } else {
1092 /* don't flush in fifo or it will cause endpoint interrupt */
1093 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1094 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1095
1096 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1097 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1098 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1099 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1100
1101 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1102 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1103
1104 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1105 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1106 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1107 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1108 }
1109
1110 /* enable irqs */
1111 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1112 udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1113
1114 /* print some debug message */
1115 tmp = desc->bEndpointAddress;
1116 dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1117 _ep->name,ep->num, tmp,
1118 desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1119
1120 local_irq_restore (flags);
1121 s3c2410_udc_set_halt(_ep, 0);
1122
1123 return 0;
1124 }
1125
1126 /*
1127 * s3c2410_udc_ep_disable
1128 */
1129 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1130 {
1131 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1132 unsigned long flags;
1133 u32 int_en_reg;
1134
1135 if (!_ep || !ep->desc) {
1136 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1137 _ep ? ep->ep.name : NULL);
1138 return -EINVAL;
1139 }
1140
1141 local_irq_save(flags);
1142
1143 dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1144
1145 ep->desc = NULL;
1146 ep->halted = 1;
1147
1148 s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1149
1150 /* disable irqs */
1151 int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1152 udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1153
1154 local_irq_restore(flags);
1155
1156 dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1157
1158 return 0;
1159 }
1160
1161 /*
1162 * s3c2410_udc_alloc_request
1163 */
1164 static struct usb_request *
1165 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1166 {
1167 struct s3c2410_request *req;
1168
1169 dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1170
1171 if (!_ep)
1172 return NULL;
1173
1174 req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1175 if (!req)
1176 return NULL;
1177
1178 INIT_LIST_HEAD (&req->queue);
1179 return &req->req;
1180 }
1181
1182 /*
1183 * s3c2410_udc_free_request
1184 */
1185 static void
1186 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1187 {
1188 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1189 struct s3c2410_request *req = to_s3c2410_req(_req);
1190
1191 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1192
1193 if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1194 return;
1195
1196 WARN_ON (!list_empty (&req->queue));
1197 kfree(req);
1198 }
1199
1200 /*
1201 * s3c2410_udc_queue
1202 */
1203 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1204 gfp_t gfp_flags)
1205 {
1206 struct s3c2410_request *req = to_s3c2410_req(_req);
1207 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1208 struct s3c2410_udc *dev;
1209 u32 ep_csr = 0;
1210 int fifo_count = 0;
1211 unsigned long flags;
1212
1213 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1214 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1215 return -EINVAL;
1216 }
1217
1218 dev = ep->dev;
1219 if (unlikely (!dev->driver
1220 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1221 return -ESHUTDOWN;
1222 }
1223
1224 local_irq_save (flags);
1225
1226 if (unlikely(!_req || !_req->complete
1227 || !_req->buf || !list_empty(&req->queue))) {
1228 if (!_req)
1229 dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1230 else {
1231 dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1232 __func__, !_req->complete,!_req->buf,
1233 !list_empty(&req->queue));
1234 }
1235
1236 local_irq_restore(flags);
1237 return -EINVAL;
1238 }
1239
1240 _req->status = -EINPROGRESS;
1241 _req->actual = 0;
1242
1243 dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1244 __func__, ep->bEndpointAddress, _req->length);
1245
1246 if (ep->bEndpointAddress) {
1247 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1248
1249 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1250 ? S3C2410_UDC_IN_CSR1_REG
1251 : S3C2410_UDC_OUT_CSR1_REG);
1252 fifo_count = s3c2410_udc_fifo_count_out();
1253 } else {
1254 udc_write(0, S3C2410_UDC_INDEX_REG);
1255 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1256 fifo_count = s3c2410_udc_fifo_count_out();
1257 }
1258
1259 /* kickstart this i/o queue? */
1260 if (list_empty(&ep->queue) && !ep->halted) {
1261 if (ep->bEndpointAddress == 0 /* ep0 */) {
1262 switch (dev->ep0state) {
1263 case EP0_IN_DATA_PHASE:
1264 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1265 && s3c2410_udc_write_fifo(ep,
1266 req)) {
1267 dev->ep0state = EP0_IDLE;
1268 req = NULL;
1269 }
1270 break;
1271
1272 case EP0_OUT_DATA_PHASE:
1273 if ((!_req->length)
1274 || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1275 && s3c2410_udc_read_fifo(ep,
1276 req))) {
1277 dev->ep0state = EP0_IDLE;
1278 req = NULL;
1279 }
1280 break;
1281
1282 default:
1283 local_irq_restore(flags);
1284 return -EL2HLT;
1285 }
1286 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1287 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1288 && s3c2410_udc_write_fifo(ep, req)) {
1289 req = NULL;
1290 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1291 && fifo_count
1292 && s3c2410_udc_read_fifo(ep, req)) {
1293 req = NULL;
1294 }
1295 }
1296
1297 /* pio or dma irq handler advances the queue. */
1298 if (likely (req != 0))
1299 list_add_tail(&req->queue, &ep->queue);
1300
1301 local_irq_restore(flags);
1302
1303 dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1304 return 0;
1305 }
1306
1307 /*
1308 * s3c2410_udc_dequeue
1309 */
1310 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1311 {
1312 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1313 struct s3c2410_udc *udc;
1314 int retval = -EINVAL;
1315 unsigned long flags;
1316 struct s3c2410_request *req = NULL;
1317
1318 dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1319
1320 if (!the_controller->driver)
1321 return -ESHUTDOWN;
1322
1323 if (!_ep || !_req)
1324 return retval;
1325
1326 udc = to_s3c2410_udc(ep->gadget);
1327
1328 local_irq_save (flags);
1329
1330 list_for_each_entry (req, &ep->queue, queue) {
1331 if (&req->req == _req) {
1332 list_del_init (&req->queue);
1333 _req->status = -ECONNRESET;
1334 retval = 0;
1335 break;
1336 }
1337 }
1338
1339 if (retval == 0) {
1340 dprintk(DEBUG_VERBOSE,
1341 "dequeued req %p from %s, len %d buf %p\n",
1342 req, _ep->name, _req->length, _req->buf);
1343
1344 s3c2410_udc_done(ep, req, -ECONNRESET);
1345 }
1346
1347 local_irq_restore (flags);
1348 return retval;
1349 }
1350
1351 /*
1352 * s3c2410_udc_set_halt
1353 */
1354 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1355 {
1356 struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1357 u32 ep_csr = 0;
1358 unsigned long flags;
1359 u32 idx;
1360
1361 if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1362 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1363 return -EINVAL;
1364 }
1365
1366 local_irq_save (flags);
1367
1368 idx = ep->bEndpointAddress & 0x7F;
1369
1370 if (idx == 0) {
1371 s3c2410_udc_set_ep0_ss(base_addr);
1372 s3c2410_udc_set_ep0_de_out(base_addr);
1373 } else {
1374 udc_write(idx, S3C2410_UDC_INDEX_REG);
1375 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1376 ? S3C2410_UDC_IN_CSR1_REG
1377 : S3C2410_UDC_OUT_CSR1_REG);
1378
1379 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1380 if (value)
1381 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1382 S3C2410_UDC_IN_CSR1_REG);
1383 else {
1384 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1385 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1386 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1387 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1388 }
1389 } else {
1390 if (value)
1391 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1392 S3C2410_UDC_OUT_CSR1_REG);
1393 else {
1394 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1395 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1396 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1397 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1398 }
1399 }
1400 }
1401
1402 ep->halted = value ? 1 : 0;
1403 local_irq_restore (flags);
1404
1405 return 0;
1406 }
1407
1408 static const struct usb_ep_ops s3c2410_ep_ops = {
1409 .enable = s3c2410_udc_ep_enable,
1410 .disable = s3c2410_udc_ep_disable,
1411
1412 .alloc_request = s3c2410_udc_alloc_request,
1413 .free_request = s3c2410_udc_free_request,
1414
1415 .queue = s3c2410_udc_queue,
1416 .dequeue = s3c2410_udc_dequeue,
1417
1418 .set_halt = s3c2410_udc_set_halt,
1419 };
1420
1421 /*------------------------- usb_gadget_ops ----------------------------------*/
1422
1423 /*
1424 * s3c2410_udc_get_frame
1425 */
1426 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1427 {
1428 int tmp;
1429
1430 dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1431
1432 tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1433 tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1434 return tmp;
1435 }
1436
1437 /*
1438 * s3c2410_udc_wakeup
1439 */
1440 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1441 {
1442 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1443 return 0;
1444 }
1445
1446 /*
1447 * s3c2410_udc_set_selfpowered
1448 */
1449 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1450 {
1451 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1452
1453 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1454
1455 if (value)
1456 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1457 else
1458 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1459
1460 return 0;
1461 }
1462
1463 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1464 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1465
1466 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1467 {
1468 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1469
1470 if (udc_info && udc_info->udc_command) {
1471 if (is_on)
1472 s3c2410_udc_enable(udc);
1473 else {
1474 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1475 if (udc->driver && udc->driver->disconnect)
1476 udc->driver->disconnect(&udc->gadget);
1477
1478 }
1479 s3c2410_udc_disable(udc);
1480 }
1481 }
1482 else
1483 return -EOPNOTSUPP;
1484
1485 return 0;
1486 }
1487
1488 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1489 {
1490 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1491
1492 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1493
1494 udc->vbus = (is_active != 0);
1495 s3c2410_udc_set_pullup(udc, is_active);
1496 return 0;
1497 }
1498
1499 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1500 {
1501 struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1502
1503 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1504
1505 s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1506 return 0;
1507 }
1508
1509 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1510 {
1511 struct s3c2410_udc *dev = _dev;
1512 unsigned int value;
1513
1514 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1515
1516 value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1517 if (udc_info->vbus_pin_inverted)
1518 value = !value;
1519
1520 if (value != dev->vbus)
1521 s3c2410_udc_vbus_session(&dev->gadget, value);
1522
1523 return IRQ_HANDLED;
1524 }
1525
1526 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1527 {
1528 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1529
1530 if (udc_info && udc_info->vbus_draw) {
1531 udc_info->vbus_draw(ma);
1532 return 0;
1533 }
1534
1535 return -ENOTSUPP;
1536 }
1537
1538 static const struct usb_gadget_ops s3c2410_ops = {
1539 .get_frame = s3c2410_udc_get_frame,
1540 .wakeup = s3c2410_udc_wakeup,
1541 .set_selfpowered = s3c2410_udc_set_selfpowered,
1542 .pullup = s3c2410_udc_pullup,
1543 .vbus_session = s3c2410_udc_vbus_session,
1544 .vbus_draw = s3c2410_vbus_draw,
1545 };
1546
1547 /*------------------------- gadget driver handling---------------------------*/
1548 /*
1549 * s3c2410_udc_disable
1550 */
1551 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1552 {
1553 dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1554
1555 /* Disable all interrupts */
1556 udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1557 udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1558
1559 /* Clear the interrupt registers */
1560 udc_write(S3C2410_UDC_USBINT_RESET
1561 | S3C2410_UDC_USBINT_RESUME
1562 | S3C2410_UDC_USBINT_SUSPEND,
1563 S3C2410_UDC_USB_INT_REG);
1564
1565 udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1566
1567 /* Good bye, cruel world */
1568 if (udc_info && udc_info->udc_command)
1569 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1570
1571 /* Set speed to unknown */
1572 dev->gadget.speed = USB_SPEED_UNKNOWN;
1573 }
1574
1575 /*
1576 * s3c2410_udc_reinit
1577 */
1578 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1579 {
1580 u32 i;
1581
1582 /* device/ep0 records init */
1583 INIT_LIST_HEAD (&dev->gadget.ep_list);
1584 INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1585 dev->ep0state = EP0_IDLE;
1586
1587 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1588 struct s3c2410_ep *ep = &dev->ep[i];
1589
1590 if (i != 0)
1591 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1592
1593 ep->dev = dev;
1594 ep->desc = NULL;
1595 ep->halted = 0;
1596 INIT_LIST_HEAD (&ep->queue);
1597 }
1598 }
1599
1600 /*
1601 * s3c2410_udc_enable
1602 */
1603 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1604 {
1605 int i;
1606
1607 dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1608
1609 /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1610 dev->gadget.speed = USB_SPEED_FULL;
1611
1612 /* Set MAXP for all endpoints */
1613 for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1614 udc_write(i, S3C2410_UDC_INDEX_REG);
1615 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1616 S3C2410_UDC_MAXP_REG);
1617 }
1618
1619 /* Set default power state */
1620 udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1621
1622 /* Enable reset and suspend interrupt interrupts */
1623 udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1624 S3C2410_UDC_USB_INT_EN_REG);
1625
1626 /* Enable ep0 interrupt */
1627 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1628
1629 /* time to say "hello, world" */
1630 if (udc_info && udc_info->udc_command)
1631 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1632 }
1633
1634 /*
1635 * usb_gadget_probe_driver
1636 */
1637 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1638 int (*bind)(struct usb_gadget *))
1639 {
1640 struct s3c2410_udc *udc = the_controller;
1641 int retval;
1642
1643 dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1644
1645 /* Sanity checks */
1646 if (!udc)
1647 return -ENODEV;
1648
1649 if (udc->driver)
1650 return -EBUSY;
1651
1652 if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
1653 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1654 bind, driver->setup, driver->speed);
1655 return -EINVAL;
1656 }
1657 #if defined(MODULE)
1658 if (!driver->unbind) {
1659 printk(KERN_ERR "Invalid driver: no unbind method\n");
1660 return -EINVAL;
1661 }
1662 #endif
1663
1664 /* Hook the driver */
1665 udc->driver = driver;
1666 udc->gadget.dev.driver = &driver->driver;
1667
1668 /* Bind the driver */
1669 if ((retval = device_add(&udc->gadget.dev)) != 0) {
1670 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1671 goto register_error;
1672 }
1673
1674 dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1675 driver->driver.name);
1676
1677 if ((retval = bind(&udc->gadget)) != 0) {
1678 device_del(&udc->gadget.dev);
1679 goto register_error;
1680 }
1681
1682 /* Enable udc */
1683 s3c2410_udc_enable(udc);
1684
1685 return 0;
1686
1687 register_error:
1688 udc->driver = NULL;
1689 udc->gadget.dev.driver = NULL;
1690 return retval;
1691 }
1692 EXPORT_SYMBOL(usb_gadget_probe_driver);
1693
1694 /*
1695 * usb_gadget_unregister_driver
1696 */
1697 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1698 {
1699 struct s3c2410_udc *udc = the_controller;
1700
1701 if (!udc)
1702 return -ENODEV;
1703
1704 if (!driver || driver != udc->driver || !driver->unbind)
1705 return -EINVAL;
1706
1707 dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1708 driver->driver.name);
1709
1710 /* report disconnect */
1711 if (driver->disconnect)
1712 driver->disconnect(&udc->gadget);
1713
1714 driver->unbind(&udc->gadget);
1715
1716 device_del(&udc->gadget.dev);
1717 udc->driver = NULL;
1718
1719 /* Disable udc */
1720 s3c2410_udc_disable(udc);
1721
1722 return 0;
1723 }
1724
1725 /*---------------------------------------------------------------------------*/
1726 static struct s3c2410_udc memory = {
1727 .gadget = {
1728 .ops = &s3c2410_ops,
1729 .ep0 = &memory.ep[0].ep,
1730 .name = gadget_name,
1731 .dev = {
1732 .init_name = "gadget",
1733 },
1734 },
1735
1736 /* control endpoint */
1737 .ep[0] = {
1738 .num = 0,
1739 .ep = {
1740 .name = ep0name,
1741 .ops = &s3c2410_ep_ops,
1742 .maxpacket = EP0_FIFO_SIZE,
1743 },
1744 .dev = &memory,
1745 },
1746
1747 /* first group of endpoints */
1748 .ep[1] = {
1749 .num = 1,
1750 .ep = {
1751 .name = "ep1-bulk",
1752 .ops = &s3c2410_ep_ops,
1753 .maxpacket = EP_FIFO_SIZE,
1754 },
1755 .dev = &memory,
1756 .fifo_size = EP_FIFO_SIZE,
1757 .bEndpointAddress = 1,
1758 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1759 },
1760 .ep[2] = {
1761 .num = 2,
1762 .ep = {
1763 .name = "ep2-bulk",
1764 .ops = &s3c2410_ep_ops,
1765 .maxpacket = EP_FIFO_SIZE,
1766 },
1767 .dev = &memory,
1768 .fifo_size = EP_FIFO_SIZE,
1769 .bEndpointAddress = 2,
1770 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1771 },
1772 .ep[3] = {
1773 .num = 3,
1774 .ep = {
1775 .name = "ep3-bulk",
1776 .ops = &s3c2410_ep_ops,
1777 .maxpacket = EP_FIFO_SIZE,
1778 },
1779 .dev = &memory,
1780 .fifo_size = EP_FIFO_SIZE,
1781 .bEndpointAddress = 3,
1782 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1783 },
1784 .ep[4] = {
1785 .num = 4,
1786 .ep = {
1787 .name = "ep4-bulk",
1788 .ops = &s3c2410_ep_ops,
1789 .maxpacket = EP_FIFO_SIZE,
1790 },
1791 .dev = &memory,
1792 .fifo_size = EP_FIFO_SIZE,
1793 .bEndpointAddress = 4,
1794 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1795 }
1796
1797 };
1798
1799 /*
1800 * probe - binds to the platform device
1801 */
1802 static int s3c2410_udc_probe(struct platform_device *pdev)
1803 {
1804 struct s3c2410_udc *udc = &memory;
1805 struct device *dev = &pdev->dev;
1806 int retval;
1807 int irq;
1808
1809 dev_dbg(dev, "%s()\n", __func__);
1810
1811 usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1812 if (IS_ERR(usb_bus_clock)) {
1813 dev_err(dev, "failed to get usb bus clock source\n");
1814 return PTR_ERR(usb_bus_clock);
1815 }
1816
1817 clk_enable(usb_bus_clock);
1818
1819 udc_clock = clk_get(NULL, "usb-device");
1820 if (IS_ERR(udc_clock)) {
1821 dev_err(dev, "failed to get udc clock source\n");
1822 return PTR_ERR(udc_clock);
1823 }
1824
1825 clk_enable(udc_clock);
1826
1827 mdelay(10);
1828
1829 dev_dbg(dev, "got and enabled clocks\n");
1830
1831 if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1832 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1833 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1834 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1835 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1836 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1837 }
1838
1839 spin_lock_init (&udc->lock);
1840 udc_info = pdev->dev.platform_data;
1841
1842 rsrc_start = S3C2410_PA_USBDEV;
1843 rsrc_len = S3C24XX_SZ_USBDEV;
1844
1845 if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1846 return -EBUSY;
1847
1848 base_addr = ioremap(rsrc_start, rsrc_len);
1849 if (!base_addr) {
1850 retval = -ENOMEM;
1851 goto err_mem;
1852 }
1853
1854 device_initialize(&udc->gadget.dev);
1855 udc->gadget.dev.parent = &pdev->dev;
1856 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1857
1858 the_controller = udc;
1859 platform_set_drvdata(pdev, udc);
1860
1861 s3c2410_udc_disable(udc);
1862 s3c2410_udc_reinit(udc);
1863
1864 /* irq setup after old hardware state is cleaned up */
1865 retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1866 IRQF_DISABLED, gadget_name, udc);
1867
1868 if (retval != 0) {
1869 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1870 retval = -EBUSY;
1871 goto err_map;
1872 }
1873
1874 dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1875
1876 if (udc_info && udc_info->vbus_pin > 0) {
1877 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1878 if (retval < 0) {
1879 dev_err(dev, "cannot claim vbus pin\n");
1880 goto err_int;
1881 }
1882
1883 irq = gpio_to_irq(udc_info->vbus_pin);
1884 if (irq < 0) {
1885 dev_err(dev, "no irq for gpio vbus pin\n");
1886 goto err_gpio_claim;
1887 }
1888
1889 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1890 IRQF_DISABLED | IRQF_TRIGGER_RISING
1891 | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1892 gadget_name, udc);
1893
1894 if (retval != 0) {
1895 dev_err(dev, "can't get vbus irq %d, err %d\n",
1896 irq, retval);
1897 retval = -EBUSY;
1898 goto err_gpio_claim;
1899 }
1900
1901 dev_dbg(dev, "got irq %i\n", irq);
1902 } else {
1903 udc->vbus = 1;
1904 }
1905
1906 if (s3c2410_udc_debugfs_root) {
1907 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1908 s3c2410_udc_debugfs_root,
1909 udc, &s3c2410_udc_debugfs_fops);
1910 if (!udc->regs_info)
1911 dev_warn(dev, "debugfs file creation failed\n");
1912 }
1913
1914 dev_dbg(dev, "probe ok\n");
1915
1916 return 0;
1917
1918 err_gpio_claim:
1919 if (udc_info && udc_info->vbus_pin > 0)
1920 gpio_free(udc_info->vbus_pin);
1921 err_int:
1922 free_irq(IRQ_USBD, udc);
1923 err_map:
1924 iounmap(base_addr);
1925 err_mem:
1926 release_mem_region(rsrc_start, rsrc_len);
1927
1928 return retval;
1929 }
1930
1931 /*
1932 * s3c2410_udc_remove
1933 */
1934 static int s3c2410_udc_remove(struct platform_device *pdev)
1935 {
1936 struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1937 unsigned int irq;
1938
1939 dev_dbg(&pdev->dev, "%s()\n", __func__);
1940 if (udc->driver)
1941 return -EBUSY;
1942
1943 debugfs_remove(udc->regs_info);
1944
1945 if (udc_info && udc_info->vbus_pin > 0) {
1946 irq = gpio_to_irq(udc_info->vbus_pin);
1947 free_irq(irq, udc);
1948 }
1949
1950 free_irq(IRQ_USBD, udc);
1951
1952 iounmap(base_addr);
1953 release_mem_region(rsrc_start, rsrc_len);
1954
1955 platform_set_drvdata(pdev, NULL);
1956
1957 if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1958 clk_disable(udc_clock);
1959 clk_put(udc_clock);
1960 udc_clock = NULL;
1961 }
1962
1963 if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1964 clk_disable(usb_bus_clock);
1965 clk_put(usb_bus_clock);
1966 usb_bus_clock = NULL;
1967 }
1968
1969 dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1970 return 0;
1971 }
1972
1973 #ifdef CONFIG_PM
1974 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1975 {
1976 if (udc_info && udc_info->udc_command)
1977 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1978
1979 return 0;
1980 }
1981
1982 static int s3c2410_udc_resume(struct platform_device *pdev)
1983 {
1984 if (udc_info && udc_info->udc_command)
1985 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1986
1987 return 0;
1988 }
1989 #else
1990 #define s3c2410_udc_suspend NULL
1991 #define s3c2410_udc_resume NULL
1992 #endif
1993
1994 static struct platform_driver udc_driver_2410 = {
1995 .driver = {
1996 .name = "s3c2410-usbgadget",
1997 .owner = THIS_MODULE,
1998 },
1999 .probe = s3c2410_udc_probe,
2000 .remove = s3c2410_udc_remove,
2001 .suspend = s3c2410_udc_suspend,
2002 .resume = s3c2410_udc_resume,
2003 };
2004
2005 static struct platform_driver udc_driver_2440 = {
2006 .driver = {
2007 .name = "s3c2440-usbgadget",
2008 .owner = THIS_MODULE,
2009 },
2010 .probe = s3c2410_udc_probe,
2011 .remove = s3c2410_udc_remove,
2012 .suspend = s3c2410_udc_suspend,
2013 .resume = s3c2410_udc_resume,
2014 };
2015
2016 static int __init udc_init(void)
2017 {
2018 int retval;
2019
2020 dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2021
2022 s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2023 if (IS_ERR(s3c2410_udc_debugfs_root)) {
2024 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2025 gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2026 s3c2410_udc_debugfs_root = NULL;
2027 }
2028
2029 retval = platform_driver_register(&udc_driver_2410);
2030 if (retval)
2031 goto err;
2032
2033 retval = platform_driver_register(&udc_driver_2440);
2034 if (retval)
2035 goto err;
2036
2037 return 0;
2038
2039 err:
2040 debugfs_remove(s3c2410_udc_debugfs_root);
2041 return retval;
2042 }
2043
2044 static void __exit udc_exit(void)
2045 {
2046 platform_driver_unregister(&udc_driver_2410);
2047 platform_driver_unregister(&udc_driver_2440);
2048 debugfs_remove(s3c2410_udc_debugfs_root);
2049 }
2050
2051 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2052
2053 module_init(udc_init);
2054 module_exit(udc_exit);
2055
2056 MODULE_AUTHOR(DRIVER_AUTHOR);
2057 MODULE_DESCRIPTION(DRIVER_DESC);
2058 MODULE_VERSION(DRIVER_VERSION);
2059 MODULE_LICENSE("GPL");
2060 MODULE_ALIAS("platform:s3c2410-usbgadget");
2061 MODULE_ALIAS("platform:s3c2440-usbgadget");
linux-next