Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw
[linux-2.6] / drivers / usb / gadget / s3c2410_udc.c
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/smp_lock.h>
32 #include <linux/errno.h>
33 #include <linux/init.h>
34 #include <linux/timer.h>
35 #include <linux/list.h>
36 #include <linux/interrupt.h>
37 #include <linux/platform_device.h>
38 #include <linux/clk.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 #include <mach/regs-gpio.h>
55
56 #include <asm/plat-s3c24xx/regs-udc.h>
57 #include <asm/plat-s3c24xx/udc.h>
58
59
60 #include "s3c2410_udc.h"
61
62 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
63 #define DRIVER_VERSION  "29 Apr 2007"
64 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
65                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
66
67 static const char               gadget_name[] = "s3c2410_udc";
68 static const char               driver_desc[] = DRIVER_DESC;
69
70 static struct s3c2410_udc       *the_controller;
71 static struct clk               *udc_clock;
72 static struct clk               *usb_bus_clock;
73 static void __iomem             *base_addr;
74 static u64                      rsrc_start;
75 static u64                      rsrc_len;
76 static struct dentry            *s3c2410_udc_debugfs_root;
77
78 static inline u32 udc_read(u32 reg)
79 {
80         return readb(base_addr + reg);
81 }
82
83 static inline void udc_write(u32 value, u32 reg)
84 {
85         writeb(value, base_addr + reg);
86 }
87
88 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
89 {
90         writeb(value, base + reg);
91 }
92
93 static struct s3c2410_udc_mach_info *udc_info;
94
95 /*************************** DEBUG FUNCTION ***************************/
96 #define DEBUG_NORMAL    1
97 #define DEBUG_VERBOSE   2
98
99 #ifdef CONFIG_USB_S3C2410_DEBUG
100 #define USB_S3C2410_DEBUG_LEVEL 0
101
102 static uint32_t s3c2410_ticks = 0;
103
104 static int dprintk(int level, const char *fmt, ...)
105 {
106         static char printk_buf[1024];
107         static long prevticks;
108         static int invocation;
109         va_list args;
110         int len;
111
112         if (level > USB_S3C2410_DEBUG_LEVEL)
113                 return 0;
114
115         if (s3c2410_ticks != prevticks) {
116                 prevticks = s3c2410_ticks;
117                 invocation = 0;
118         }
119
120         len = scnprintf(printk_buf,
121                         sizeof(printk_buf), "%1lu.%02d USB: ",
122                         prevticks, invocation++);
123
124         va_start(args, fmt);
125         len = vscnprintf(printk_buf+len,
126                         sizeof(printk_buf)-len, fmt, args);
127         va_end(args);
128
129         return printk(KERN_DEBUG "%s", printk_buf);
130 }
131 #else
132 static int dprintk(int level, const char *fmt, ...)
133 {
134         return 0;
135 }
136 #endif
137 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
138 {
139         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
140         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
141         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
142         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
143
144         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
145         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
146         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
147         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
148         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
149         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
150         udc_write(0, S3C2410_UDC_INDEX_REG);
151         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
152         udc_write(1, S3C2410_UDC_INDEX_REG);
153         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
154         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
155         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
156         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
157         udc_write(2, S3C2410_UDC_INDEX_REG);
158         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
159         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
160         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
161         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
162
163         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
164                  "PWR_REG        : 0x%04X\n"
165                  "EP_INT_REG     : 0x%04X\n"
166                  "USB_INT_REG    : 0x%04X\n"
167                  "EP_INT_EN_REG  : 0x%04X\n"
168                  "USB_INT_EN_REG : 0x%04X\n"
169                  "EP0_CSR        : 0x%04X\n"
170                  "EP1_I_CSR1     : 0x%04X\n"
171                  "EP1_I_CSR2     : 0x%04X\n"
172                  "EP1_O_CSR1     : 0x%04X\n"
173                  "EP1_O_CSR2     : 0x%04X\n"
174                  "EP2_I_CSR1     : 0x%04X\n"
175                  "EP2_I_CSR2     : 0x%04X\n"
176                  "EP2_O_CSR1     : 0x%04X\n"
177                  "EP2_O_CSR2     : 0x%04X\n",
178                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
179                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
180                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
181                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
182                 );
183
184         return 0;
185 }
186
187 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
188                                          struct file *file)
189 {
190         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
191 }
192
193 static const struct file_operations s3c2410_udc_debugfs_fops = {
194         .open           = s3c2410_udc_debugfs_fops_open,
195         .read           = seq_read,
196         .llseek         = seq_lseek,
197         .release        = single_release,
198         .owner          = THIS_MODULE,
199 };
200
201 /* io macros */
202
203 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
204 {
205         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
206         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
207                         S3C2410_UDC_EP0_CSR_REG);
208 }
209
210 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
211 {
212         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
213         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
214 }
215
216 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
217 {
218         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
219         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
220 }
221
222 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
223 {
224         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
225         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
226 }
227
228 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
229 {
230         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
231         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
232 }
233
234 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
235 {
236         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
237         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
238 }
239
240 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
241 {
242         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
243
244         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
245                                 | S3C2410_UDC_EP0_CSR_DE),
246                         S3C2410_UDC_EP0_CSR_REG);
247 }
248
249 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
250 {
251         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
252         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
253                                 | S3C2410_UDC_EP0_CSR_SSE),
254                         S3C2410_UDC_EP0_CSR_REG);
255 }
256
257 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
258 {
259         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
260         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
261                         | S3C2410_UDC_EP0_CSR_DE),
262                 S3C2410_UDC_EP0_CSR_REG);
263 }
264
265 /*------------------------- I/O ----------------------------------*/
266
267 /*
268  *      s3c2410_udc_done
269  */
270 static void s3c2410_udc_done(struct s3c2410_ep *ep,
271                 struct s3c2410_request *req, int status)
272 {
273         unsigned halted = ep->halted;
274
275         list_del_init(&req->queue);
276
277         if (likely (req->req.status == -EINPROGRESS))
278                 req->req.status = status;
279         else
280                 status = req->req.status;
281
282         ep->halted = 1;
283         req->req.complete(&ep->ep, &req->req);
284         ep->halted = halted;
285 }
286
287 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
288                 struct s3c2410_ep *ep, int status)
289 {
290         /* Sanity check */
291         if (&ep->queue == NULL)
292                 return;
293
294         while (!list_empty (&ep->queue)) {
295                 struct s3c2410_request *req;
296                 req = list_entry (ep->queue.next, struct s3c2410_request,
297                                 queue);
298                 s3c2410_udc_done(ep, req, status);
299         }
300 }
301
302 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
303 {
304         unsigned i;
305
306         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
307          * fifos, and pending transactions mustn't be continued in any case.
308          */
309
310         for (i = 1; i < S3C2410_ENDPOINTS; i++)
311                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
312 }
313
314 static inline int s3c2410_udc_fifo_count_out(void)
315 {
316         int tmp;
317
318         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
319         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
320         return tmp;
321 }
322
323 /*
324  *      s3c2410_udc_write_packet
325  */
326 static inline int s3c2410_udc_write_packet(int fifo,
327                 struct s3c2410_request *req,
328                 unsigned max)
329 {
330         unsigned len = min(req->req.length - req->req.actual, max);
331         u8 *buf = req->req.buf + req->req.actual;
332
333         prefetch(buf);
334
335         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
336                 req->req.actual, req->req.length, len, req->req.actual + len);
337
338         req->req.actual += len;
339
340         udelay(5);
341         writesb(base_addr + fifo, buf, len);
342         return len;
343 }
344
345 /*
346  *      s3c2410_udc_write_fifo
347  *
348  * return:  0 = still running, 1 = completed, negative = errno
349  */
350 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
351                 struct s3c2410_request *req)
352 {
353         unsigned        count;
354         int             is_last;
355         u32             idx;
356         int             fifo_reg;
357         u32             ep_csr;
358
359         idx = ep->bEndpointAddress & 0x7F;
360         switch (idx) {
361         default:
362                 idx = 0;
363         case 0:
364                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
365                 break;
366         case 1:
367                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
368                 break;
369         case 2:
370                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
371                 break;
372         case 3:
373                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
374                 break;
375         case 4:
376                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
377                 break;
378         }
379
380         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
381
382         /* last packet is often short (sometimes a zlp) */
383         if (count != ep->ep.maxpacket)
384                 is_last = 1;
385         else if (req->req.length != req->req.actual || req->req.zero)
386                 is_last = 0;
387         else
388                 is_last = 2;
389
390         /* Only ep0 debug messages are interesting */
391         if (idx == 0)
392                 dprintk(DEBUG_NORMAL,
393                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
394                         idx, count, req->req.actual, req->req.length,
395                         is_last, req->req.zero);
396
397         if (is_last) {
398                 /* The order is important. It prevents sending 2 packets
399                  * at the same time */
400
401                 if (idx == 0) {
402                         /* Reset signal => no need to say 'data sent' */
403                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
404                                         & S3C2410_UDC_USBINT_RESET))
405                                 s3c2410_udc_set_ep0_de_in(base_addr);
406                         ep->dev->ep0state=EP0_IDLE;
407                 } else {
408                         udc_write(idx, S3C2410_UDC_INDEX_REG);
409                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
410                         udc_write(idx, S3C2410_UDC_INDEX_REG);
411                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
412                                         S3C2410_UDC_IN_CSR1_REG);
413                 }
414
415                 s3c2410_udc_done(ep, req, 0);
416                 is_last = 1;
417         } else {
418                 if (idx == 0) {
419                         /* Reset signal => no need to say 'data sent' */
420                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
421                                         & S3C2410_UDC_USBINT_RESET))
422                                 s3c2410_udc_set_ep0_ipr(base_addr);
423                 } else {
424                         udc_write(idx, S3C2410_UDC_INDEX_REG);
425                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
426                         udc_write(idx, S3C2410_UDC_INDEX_REG);
427                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
428                                         S3C2410_UDC_IN_CSR1_REG);
429                 }
430         }
431
432         return is_last;
433 }
434
435 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
436                 struct s3c2410_request *req, unsigned avail)
437 {
438         unsigned len;
439
440         len = min(req->req.length - req->req.actual, avail);
441         req->req.actual += len;
442
443         readsb(fifo + base_addr, buf, len);
444         return len;
445 }
446
447 /*
448  * return:  0 = still running, 1 = queue empty, negative = errno
449  */
450 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
451                                  struct s3c2410_request *req)
452 {
453         u8              *buf;
454         u32             ep_csr;
455         unsigned        bufferspace;
456         int             is_last=1;
457         unsigned        avail;
458         int             fifo_count = 0;
459         u32             idx;
460         int             fifo_reg;
461
462         idx = ep->bEndpointAddress & 0x7F;
463
464         switch (idx) {
465         default:
466                 idx = 0;
467         case 0:
468                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
469                 break;
470         case 1:
471                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
472                 break;
473         case 2:
474                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
475                 break;
476         case 3:
477                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
478                 break;
479         case 4:
480                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
481                 break;
482         }
483
484         if (!req->req.length)
485                 return 1;
486
487         buf = req->req.buf + req->req.actual;
488         bufferspace = req->req.length - req->req.actual;
489         if (!bufferspace) {
490                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
491                 return -1;
492         }
493
494         udc_write(idx, S3C2410_UDC_INDEX_REG);
495
496         fifo_count = s3c2410_udc_fifo_count_out();
497         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
498
499         if (fifo_count > ep->ep.maxpacket)
500                 avail = ep->ep.maxpacket;
501         else
502                 avail = fifo_count;
503
504         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
505
506         /* checking this with ep0 is not accurate as we already
507          * read a control request
508          **/
509         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
510                 is_last = 1;
511                 /* overflowed this request?  flush extra data */
512                 if (fifo_count != avail)
513                         req->req.status = -EOVERFLOW;
514         } else {
515                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
516         }
517
518         udc_write(idx, S3C2410_UDC_INDEX_REG);
519         fifo_count = s3c2410_udc_fifo_count_out();
520
521         /* Only ep0 debug messages are interesting */
522         if (idx == 0)
523                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
524                         __func__, fifo_count,is_last);
525
526         if (is_last) {
527                 if (idx == 0) {
528                         s3c2410_udc_set_ep0_de_out(base_addr);
529                         ep->dev->ep0state = EP0_IDLE;
530                 } else {
531                         udc_write(idx, S3C2410_UDC_INDEX_REG);
532                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
533                         udc_write(idx, S3C2410_UDC_INDEX_REG);
534                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
535                                         S3C2410_UDC_OUT_CSR1_REG);
536                 }
537
538                 s3c2410_udc_done(ep, req, 0);
539         } else {
540                 if (idx == 0) {
541                         s3c2410_udc_clear_ep0_opr(base_addr);
542                 } else {
543                         udc_write(idx, S3C2410_UDC_INDEX_REG);
544                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
545                         udc_write(idx, S3C2410_UDC_INDEX_REG);
546                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
547                                         S3C2410_UDC_OUT_CSR1_REG);
548                 }
549         }
550
551         return is_last;
552 }
553
554 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
555 {
556         unsigned char *outbuf = (unsigned char*)crq;
557         int bytes_read = 0;
558
559         udc_write(0, S3C2410_UDC_INDEX_REG);
560
561         bytes_read = s3c2410_udc_fifo_count_out();
562
563         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
564
565         if (bytes_read > sizeof(struct usb_ctrlrequest))
566                 bytes_read = sizeof(struct usb_ctrlrequest);
567
568         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
569
570         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
571                 bytes_read, crq->bRequest, crq->bRequestType,
572                 crq->wValue, crq->wIndex, crq->wLength);
573
574         return bytes_read;
575 }
576
577 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
578                 struct usb_ctrlrequest *crq)
579 {
580         u16 status = 0;
581         u8 ep_num = crq->wIndex & 0x7F;
582         u8 is_in = crq->wIndex & USB_DIR_IN;
583
584         switch (crq->bRequestType & USB_RECIP_MASK) {
585         case USB_RECIP_INTERFACE:
586                 break;
587
588         case USB_RECIP_DEVICE:
589                 status = dev->devstatus;
590                 break;
591
592         case USB_RECIP_ENDPOINT:
593                 if (ep_num > 4 || crq->wLength > 2)
594                         return 1;
595
596                 if (ep_num == 0) {
597                         udc_write(0, S3C2410_UDC_INDEX_REG);
598                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
599                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
600                 } else {
601                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
602                         if (is_in) {
603                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
604                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
605                         } else {
606                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
607                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
608                         }
609                 }
610
611                 status = status ? 1 : 0;
612                 break;
613
614         default:
615                 return 1;
616         }
617
618         /* Seems to be needed to get it working. ouch :( */
619         udelay(5);
620         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
621         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
622         s3c2410_udc_set_ep0_de_in(base_addr);
623
624         return 0;
625 }
626 /*------------------------- usb state machine -------------------------------*/
627 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
628
629 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
630                                         struct s3c2410_ep *ep,
631                                         struct usb_ctrlrequest *crq,
632                                         u32 ep0csr)
633 {
634         int len, ret, tmp;
635
636         /* start control request? */
637         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
638                 return;
639
640         s3c2410_udc_nuke(dev, ep, -EPROTO);
641
642         len = s3c2410_udc_read_fifo_crq(crq);
643         if (len != sizeof(*crq)) {
644                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
645                         " wanted %d bytes got %d. Stalling out...\n",
646                         sizeof(*crq), len);
647                 s3c2410_udc_set_ep0_ss(base_addr);
648                 return;
649         }
650
651         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
652                 crq->bRequest, crq->bRequestType, crq->wLength);
653
654         /* cope with automagic for some standard requests. */
655         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
656                 == USB_TYPE_STANDARD;
657         dev->req_config = 0;
658         dev->req_pending = 1;
659
660         switch (crq->bRequest) {
661         case USB_REQ_SET_CONFIGURATION:
662                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
663
664                 if (crq->bRequestType == USB_RECIP_DEVICE) {
665                         dev->req_config = 1;
666                         s3c2410_udc_set_ep0_de_out(base_addr);
667                 }
668                 break;
669
670         case USB_REQ_SET_INTERFACE:
671                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
672
673                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
674                         dev->req_config = 1;
675                         s3c2410_udc_set_ep0_de_out(base_addr);
676                 }
677                 break;
678
679         case USB_REQ_SET_ADDRESS:
680                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
681
682                 if (crq->bRequestType == USB_RECIP_DEVICE) {
683                         tmp = crq->wValue & 0x7F;
684                         dev->address = tmp;
685                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
686                                         S3C2410_UDC_FUNC_ADDR_REG);
687                         s3c2410_udc_set_ep0_de_out(base_addr);
688                         return;
689                 }
690                 break;
691
692         case USB_REQ_GET_STATUS:
693                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
694                 s3c2410_udc_clear_ep0_opr(base_addr);
695
696                 if (dev->req_std) {
697                         if (!s3c2410_udc_get_status(dev, crq)) {
698                                 return;
699                         }
700                 }
701                 break;
702
703         case USB_REQ_CLEAR_FEATURE:
704                 s3c2410_udc_clear_ep0_opr(base_addr);
705
706                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
707                         break;
708
709                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
710                         break;
711
712                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
713                 s3c2410_udc_set_ep0_de_out(base_addr);
714                 return;
715
716         case USB_REQ_SET_FEATURE:
717                 s3c2410_udc_clear_ep0_opr(base_addr);
718
719                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
720                         break;
721
722                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
723                         break;
724
725                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
726                 s3c2410_udc_set_ep0_de_out(base_addr);
727                 return;
728
729         default:
730                 s3c2410_udc_clear_ep0_opr(base_addr);
731                 break;
732         }
733
734         if (crq->bRequestType & USB_DIR_IN)
735                 dev->ep0state = EP0_IN_DATA_PHASE;
736         else
737                 dev->ep0state = EP0_OUT_DATA_PHASE;
738
739         ret = dev->driver->setup(&dev->gadget, crq);
740         if (ret < 0) {
741                 if (dev->req_config) {
742                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
743                                 crq->bRequest, ret);
744                         return;
745                 }
746
747                 if (ret == -EOPNOTSUPP)
748                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
749                 else
750                         dprintk(DEBUG_NORMAL,
751                                 "dev->driver->setup failed. (%d)\n", ret);
752
753                 udelay(5);
754                 s3c2410_udc_set_ep0_ss(base_addr);
755                 s3c2410_udc_set_ep0_de_out(base_addr);
756                 dev->ep0state = EP0_IDLE;
757                 /* deferred i/o == no response yet */
758         } else if (dev->req_pending) {
759                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
760                 dev->req_pending=0;
761         }
762
763         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
764 }
765
766 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
767 {
768         u32                     ep0csr;
769         struct s3c2410_ep       *ep = &dev->ep[0];
770         struct s3c2410_request  *req;
771         struct usb_ctrlrequest  crq;
772
773         if (list_empty(&ep->queue))
774                 req = NULL;
775         else
776                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
777
778         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
779          * S3C2410_UDC_EP0_CSR_REG when index is zero */
780
781         udc_write(0, S3C2410_UDC_INDEX_REG);
782         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
783
784         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
785                 ep0csr, ep0states[dev->ep0state]);
786
787         /* clear stall status */
788         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
789                 s3c2410_udc_nuke(dev, ep, -EPIPE);
790                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
791                 s3c2410_udc_clear_ep0_sst(base_addr);
792                 dev->ep0state = EP0_IDLE;
793                 return;
794         }
795
796         /* clear setup end */
797         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
798                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
799                 s3c2410_udc_nuke(dev, ep, 0);
800                 s3c2410_udc_clear_ep0_se(base_addr);
801                 dev->ep0state = EP0_IDLE;
802         }
803
804         switch (dev->ep0state) {
805         case EP0_IDLE:
806                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
807                 break;
808
809         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
810                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
811                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
812                         s3c2410_udc_write_fifo(ep, req);
813                 }
814                 break;
815
816         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
817                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
818                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
819                         s3c2410_udc_read_fifo(ep,req);
820                 }
821                 break;
822
823         case EP0_END_XFER:
824                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
825                 dev->ep0state = EP0_IDLE;
826                 break;
827
828         case EP0_STALL:
829                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
830                 dev->ep0state = EP0_IDLE;
831                 break;
832         }
833 }
834
835 /*
836  *      handle_ep - Manage I/O endpoints
837  */
838
839 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
840 {
841         struct s3c2410_request  *req;
842         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
843         u32                     ep_csr1;
844         u32                     idx;
845
846         if (likely (!list_empty(&ep->queue)))
847                 req = list_entry(ep->queue.next,
848                                 struct s3c2410_request, queue);
849         else
850                 req = NULL;
851
852         idx = ep->bEndpointAddress & 0x7F;
853
854         if (is_in) {
855                 udc_write(idx, S3C2410_UDC_INDEX_REG);
856                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
857                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
858                         idx, ep_csr1, req ? 1 : 0);
859
860                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
861                         dprintk(DEBUG_VERBOSE, "st\n");
862                         udc_write(idx, S3C2410_UDC_INDEX_REG);
863                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
864                                         S3C2410_UDC_IN_CSR1_REG);
865                         return;
866                 }
867
868                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
869                         s3c2410_udc_write_fifo(ep,req);
870                 }
871         } else {
872                 udc_write(idx, S3C2410_UDC_INDEX_REG);
873                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
874                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
875
876                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
877                         udc_write(idx, S3C2410_UDC_INDEX_REG);
878                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
879                                         S3C2410_UDC_OUT_CSR1_REG);
880                         return;
881                 }
882
883                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
884                         s3c2410_udc_read_fifo(ep,req);
885                 }
886         }
887 }
888
889 #include <mach/regs-irq.h>
890
891 /*
892  *      s3c2410_udc_irq - interrupt handler
893  */
894 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
895 {
896         struct s3c2410_udc *dev = _dev;
897         int usb_status;
898         int usbd_status;
899         int pwr_reg;
900         int ep0csr;
901         int i;
902         u32 idx;
903         unsigned long flags;
904
905         spin_lock_irqsave(&dev->lock, flags);
906
907         /* Driver connected ? */
908         if (!dev->driver) {
909                 /* Clear interrupts */
910                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
911                                 S3C2410_UDC_USB_INT_REG);
912                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
913                                 S3C2410_UDC_EP_INT_REG);
914         }
915
916         /* Save index */
917         idx = udc_read(S3C2410_UDC_INDEX_REG);
918
919         /* Read status registers */
920         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
921         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
922         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
923
924         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
925         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
926
927         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
928                 usb_status, usbd_status, pwr_reg, ep0csr);
929
930         /*
931          * Now, handle interrupts. There's two types :
932          * - Reset, Resume, Suspend coming -> usb_int_reg
933          * - EP -> ep_int_reg
934          */
935
936         /* RESET */
937         if (usb_status & S3C2410_UDC_USBINT_RESET) {
938                 /* two kind of reset :
939                  * - reset start -> pwr reg = 8
940                  * - reset end   -> pwr reg = 0
941                  **/
942                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
943                         ep0csr, pwr_reg);
944
945                 dev->gadget.speed = USB_SPEED_UNKNOWN;
946                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
947                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
948                                 S3C2410_UDC_MAXP_REG);
949                 dev->address = 0;
950
951                 dev->ep0state = EP0_IDLE;
952                 dev->gadget.speed = USB_SPEED_FULL;
953
954                 /* clear interrupt */
955                 udc_write(S3C2410_UDC_USBINT_RESET,
956                                 S3C2410_UDC_USB_INT_REG);
957
958                 udc_write(idx, S3C2410_UDC_INDEX_REG);
959                 spin_unlock_irqrestore(&dev->lock, flags);
960                 return IRQ_HANDLED;
961         }
962
963         /* RESUME */
964         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
965                 dprintk(DEBUG_NORMAL, "USB resume\n");
966
967                 /* clear interrupt */
968                 udc_write(S3C2410_UDC_USBINT_RESUME,
969                                 S3C2410_UDC_USB_INT_REG);
970
971                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
972                                 && dev->driver
973                                 && dev->driver->resume)
974                         dev->driver->resume(&dev->gadget);
975         }
976
977         /* SUSPEND */
978         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
979                 dprintk(DEBUG_NORMAL, "USB suspend\n");
980
981                 /* clear interrupt */
982                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
983                                 S3C2410_UDC_USB_INT_REG);
984
985                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
986                                 && dev->driver
987                                 && dev->driver->suspend)
988                         dev->driver->suspend(&dev->gadget);
989
990                 dev->ep0state = EP0_IDLE;
991         }
992
993         /* EP */
994         /* control traffic */
995         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
996          * generate an interrupt
997          */
998         if (usbd_status & S3C2410_UDC_INT_EP0) {
999                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1000                 /* Clear the interrupt bit by setting it to 1 */
1001                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1002                 s3c2410_udc_handle_ep0(dev);
1003         }
1004
1005         /* endpoint data transfers */
1006         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1007                 u32 tmp = 1 << i;
1008                 if (usbd_status & tmp) {
1009                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1010
1011                         /* Clear the interrupt bit by setting it to 1 */
1012                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1013                         s3c2410_udc_handle_ep(&dev->ep[i]);
1014                 }
1015         }
1016
1017         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1018
1019         /* Restore old index */
1020         udc_write(idx, S3C2410_UDC_INDEX_REG);
1021
1022         spin_unlock_irqrestore(&dev->lock, flags);
1023
1024         return IRQ_HANDLED;
1025 }
1026 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1027
1028 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1029 {
1030         return container_of(ep, struct s3c2410_ep, ep);
1031 }
1032
1033 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1034 {
1035         return container_of(gadget, struct s3c2410_udc, gadget);
1036 }
1037
1038 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1039 {
1040         return container_of(req, struct s3c2410_request, req);
1041 }
1042
1043 /*
1044  *      s3c2410_udc_ep_enable
1045  */
1046 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1047                                  const struct usb_endpoint_descriptor *desc)
1048 {
1049         struct s3c2410_udc      *dev;
1050         struct s3c2410_ep       *ep;
1051         u32                     max, tmp;
1052         unsigned long           flags;
1053         u32                     csr1,csr2;
1054         u32                     int_en_reg;
1055
1056         ep = to_s3c2410_ep(_ep);
1057
1058         if (!_ep || !desc || ep->desc
1059                         || _ep->name == ep0name
1060                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1061                 return -EINVAL;
1062
1063         dev = ep->dev;
1064         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1065                 return -ESHUTDOWN;
1066
1067         max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1068
1069         local_irq_save (flags);
1070         _ep->maxpacket = max & 0x7ff;
1071         ep->desc = desc;
1072         ep->halted = 0;
1073         ep->bEndpointAddress = desc->bEndpointAddress;
1074
1075         /* set max packet */
1076         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1077         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1078
1079         /* set type, direction, address; reset fifo counters */
1080         if (desc->bEndpointAddress & USB_DIR_IN) {
1081                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1082                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1083
1084                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1085                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1086                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1087                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1088         } else {
1089                 /* don't flush in fifo or it will cause endpoint interrupt */
1090                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1091                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1092
1093                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1094                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1095                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1096                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1097
1098                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1099                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1100
1101                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1102                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1103                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1104                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1105         }
1106
1107         /* enable irqs */
1108         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1109         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1110
1111         /* print some debug message */
1112         tmp = desc->bEndpointAddress;
1113         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1114                  _ep->name,ep->num, tmp,
1115                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1116
1117         local_irq_restore (flags);
1118         s3c2410_udc_set_halt(_ep, 0);
1119
1120         return 0;
1121 }
1122
1123 /*
1124  * s3c2410_udc_ep_disable
1125  */
1126 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1127 {
1128         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1129         unsigned long flags;
1130         u32 int_en_reg;
1131
1132         if (!_ep || !ep->desc) {
1133                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1134                         _ep ? ep->ep.name : NULL);
1135                 return -EINVAL;
1136         }
1137
1138         local_irq_save(flags);
1139
1140         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1141
1142         ep->desc = NULL;
1143         ep->halted = 1;
1144
1145         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1146
1147         /* disable irqs */
1148         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1149         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1150
1151         local_irq_restore(flags);
1152
1153         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1154
1155         return 0;
1156 }
1157
1158 /*
1159  * s3c2410_udc_alloc_request
1160  */
1161 static struct usb_request *
1162 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1163 {
1164         struct s3c2410_request *req;
1165
1166         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1167
1168         if (!_ep)
1169                 return NULL;
1170
1171         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1172         if (!req)
1173                 return NULL;
1174
1175         INIT_LIST_HEAD (&req->queue);
1176         return &req->req;
1177 }
1178
1179 /*
1180  * s3c2410_udc_free_request
1181  */
1182 static void
1183 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1184 {
1185         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1186         struct s3c2410_request  *req = to_s3c2410_req(_req);
1187
1188         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1189
1190         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1191                 return;
1192
1193         WARN_ON (!list_empty (&req->queue));
1194         kfree(req);
1195 }
1196
1197 /*
1198  *      s3c2410_udc_queue
1199  */
1200 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1201                 gfp_t gfp_flags)
1202 {
1203         struct s3c2410_request  *req = to_s3c2410_req(_req);
1204         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1205         struct s3c2410_udc      *dev;
1206         u32                     ep_csr = 0;
1207         int                     fifo_count = 0;
1208         unsigned long           flags;
1209
1210         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1211                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1212                 return -EINVAL;
1213         }
1214
1215         dev = ep->dev;
1216         if (unlikely (!dev->driver
1217                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1218                 return -ESHUTDOWN;
1219         }
1220
1221         local_irq_save (flags);
1222
1223         if (unlikely(!_req || !_req->complete
1224                         || !_req->buf || !list_empty(&req->queue))) {
1225                 if (!_req)
1226                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1227                 else {
1228                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1229                                 __func__, !_req->complete,!_req->buf,
1230                                 !list_empty(&req->queue));
1231                 }
1232
1233                 local_irq_restore(flags);
1234                 return -EINVAL;
1235         }
1236
1237         _req->status = -EINPROGRESS;
1238         _req->actual = 0;
1239
1240         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1241                  __func__, ep->bEndpointAddress, _req->length);
1242
1243         if (ep->bEndpointAddress) {
1244                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1245
1246                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1247                                 ? S3C2410_UDC_IN_CSR1_REG
1248                                 : S3C2410_UDC_OUT_CSR1_REG);
1249                 fifo_count = s3c2410_udc_fifo_count_out();
1250         } else {
1251                 udc_write(0, S3C2410_UDC_INDEX_REG);
1252                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1253                 fifo_count = s3c2410_udc_fifo_count_out();
1254         }
1255
1256         /* kickstart this i/o queue? */
1257         if (list_empty(&ep->queue) && !ep->halted) {
1258                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1259                         switch (dev->ep0state) {
1260                         case EP0_IN_DATA_PHASE:
1261                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1262                                                 && s3c2410_udc_write_fifo(ep,
1263                                                         req)) {
1264                                         dev->ep0state = EP0_IDLE;
1265                                         req = NULL;
1266                                 }
1267                                 break;
1268
1269                         case EP0_OUT_DATA_PHASE:
1270                                 if ((!_req->length)
1271                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1272                                                 && s3c2410_udc_read_fifo(ep,
1273                                                         req))) {
1274                                         dev->ep0state = EP0_IDLE;
1275                                         req = NULL;
1276                                 }
1277                                 break;
1278
1279                         default:
1280                                 local_irq_restore(flags);
1281                                 return -EL2HLT;
1282                         }
1283                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1284                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1285                                 && s3c2410_udc_write_fifo(ep, req)) {
1286                         req = NULL;
1287                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1288                                 && fifo_count
1289                                 && s3c2410_udc_read_fifo(ep, req)) {
1290                         req = NULL;
1291                 }
1292         }
1293
1294         /* pio or dma irq handler advances the queue. */
1295         if (likely (req != 0))
1296                 list_add_tail(&req->queue, &ep->queue);
1297
1298         local_irq_restore(flags);
1299
1300         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1301         return 0;
1302 }
1303
1304 /*
1305  *      s3c2410_udc_dequeue
1306  */
1307 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1308 {
1309         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1310         struct s3c2410_udc      *udc;
1311         int                     retval = -EINVAL;
1312         unsigned long           flags;
1313         struct s3c2410_request  *req = NULL;
1314
1315         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1316
1317         if (!the_controller->driver)
1318                 return -ESHUTDOWN;
1319
1320         if (!_ep || !_req)
1321                 return retval;
1322
1323         udc = to_s3c2410_udc(ep->gadget);
1324
1325         local_irq_save (flags);
1326
1327         list_for_each_entry (req, &ep->queue, queue) {
1328                 if (&req->req == _req) {
1329                         list_del_init (&req->queue);
1330                         _req->status = -ECONNRESET;
1331                         retval = 0;
1332                         break;
1333                 }
1334         }
1335
1336         if (retval == 0) {
1337                 dprintk(DEBUG_VERBOSE,
1338                         "dequeued req %p from %s, len %d buf %p\n",
1339                         req, _ep->name, _req->length, _req->buf);
1340
1341                 s3c2410_udc_done(ep, req, -ECONNRESET);
1342         }
1343
1344         local_irq_restore (flags);
1345         return retval;
1346 }
1347
1348 /*
1349  * s3c2410_udc_set_halt
1350  */
1351 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1352 {
1353         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1354         u32                     ep_csr = 0;
1355         unsigned long           flags;
1356         u32                     idx;
1357
1358         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1359                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1360                 return -EINVAL;
1361         }
1362
1363         local_irq_save (flags);
1364
1365         idx = ep->bEndpointAddress & 0x7F;
1366
1367         if (idx == 0) {
1368                 s3c2410_udc_set_ep0_ss(base_addr);
1369                 s3c2410_udc_set_ep0_de_out(base_addr);
1370         } else {
1371                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1372                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1373                                 ? S3C2410_UDC_IN_CSR1_REG
1374                                 : S3C2410_UDC_OUT_CSR1_REG);
1375
1376                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1377                         if (value)
1378                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1379                                         S3C2410_UDC_IN_CSR1_REG);
1380                         else {
1381                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1382                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1383                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1384                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1385                         }
1386                 } else {
1387                         if (value)
1388                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1389                                         S3C2410_UDC_OUT_CSR1_REG);
1390                         else {
1391                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1392                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1393                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1394                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1395                         }
1396                 }
1397         }
1398
1399         ep->halted = value ? 1 : 0;
1400         local_irq_restore (flags);
1401
1402         return 0;
1403 }
1404
1405 static const struct usb_ep_ops s3c2410_ep_ops = {
1406         .enable         = s3c2410_udc_ep_enable,
1407         .disable        = s3c2410_udc_ep_disable,
1408
1409         .alloc_request  = s3c2410_udc_alloc_request,
1410         .free_request   = s3c2410_udc_free_request,
1411
1412         .queue          = s3c2410_udc_queue,
1413         .dequeue        = s3c2410_udc_dequeue,
1414
1415         .set_halt       = s3c2410_udc_set_halt,
1416 };
1417
1418 /*------------------------- usb_gadget_ops ----------------------------------*/
1419
1420 /*
1421  *      s3c2410_udc_get_frame
1422  */
1423 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1424 {
1425         int tmp;
1426
1427         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1428
1429         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1430         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1431         return tmp;
1432 }
1433
1434 /*
1435  *      s3c2410_udc_wakeup
1436  */
1437 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1438 {
1439         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1440         return 0;
1441 }
1442
1443 /*
1444  *      s3c2410_udc_set_selfpowered
1445  */
1446 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1447 {
1448         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1449
1450         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1451
1452         if (value)
1453                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1454         else
1455                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1456
1457         return 0;
1458 }
1459
1460 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1461 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1462
1463 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1464 {
1465         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1466
1467         if (udc_info && udc_info->udc_command) {
1468                 if (is_on)
1469                         s3c2410_udc_enable(udc);
1470                 else {
1471                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1472                                 if (udc->driver && udc->driver->disconnect)
1473                                         udc->driver->disconnect(&udc->gadget);
1474
1475                         }
1476                         s3c2410_udc_disable(udc);
1477                 }
1478         }
1479         else
1480                 return -EOPNOTSUPP;
1481
1482         return 0;
1483 }
1484
1485 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1486 {
1487         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1488
1489         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1490
1491         udc->vbus = (is_active != 0);
1492         s3c2410_udc_set_pullup(udc, is_active);
1493         return 0;
1494 }
1495
1496 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1497 {
1498         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1499
1500         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1501
1502         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1503         return 0;
1504 }
1505
1506 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1507 {
1508         struct s3c2410_udc      *dev = _dev;
1509         unsigned int            value;
1510
1511         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1512
1513         /* some cpus cannot read from an line configured to IRQ! */
1514         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT);
1515         value = s3c2410_gpio_getpin(udc_info->vbus_pin);
1516         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2);
1517
1518         if (udc_info->vbus_pin_inverted)
1519                 value = !value;
1520
1521         if (value != dev->vbus)
1522                 s3c2410_udc_vbus_session(&dev->gadget, value);
1523
1524         return IRQ_HANDLED;
1525 }
1526
1527 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1528 {
1529         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1530
1531         if (udc_info && udc_info->vbus_draw) {
1532                 udc_info->vbus_draw(ma);
1533                 return 0;
1534         }
1535
1536         return -ENOTSUPP;
1537 }
1538
1539 static const struct usb_gadget_ops s3c2410_ops = {
1540         .get_frame              = s3c2410_udc_get_frame,
1541         .wakeup                 = s3c2410_udc_wakeup,
1542         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1543         .pullup                 = s3c2410_udc_pullup,
1544         .vbus_session           = s3c2410_udc_vbus_session,
1545         .vbus_draw              = s3c2410_vbus_draw,
1546 };
1547
1548 /*------------------------- gadget driver handling---------------------------*/
1549 /*
1550  * s3c2410_udc_disable
1551  */
1552 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1553 {
1554         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1555
1556         /* Disable all interrupts */
1557         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1558         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1559
1560         /* Clear the interrupt registers */
1561         udc_write(S3C2410_UDC_USBINT_RESET
1562                                 | S3C2410_UDC_USBINT_RESUME
1563                                 | S3C2410_UDC_USBINT_SUSPEND,
1564                         S3C2410_UDC_USB_INT_REG);
1565
1566         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1567
1568         /* Good bye, cruel world */
1569         if (udc_info && udc_info->udc_command)
1570                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1571
1572         /* Set speed to unknown */
1573         dev->gadget.speed = USB_SPEED_UNKNOWN;
1574 }
1575
1576 /*
1577  * s3c2410_udc_reinit
1578  */
1579 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1580 {
1581         u32 i;
1582
1583         /* device/ep0 records init */
1584         INIT_LIST_HEAD (&dev->gadget.ep_list);
1585         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1586         dev->ep0state = EP0_IDLE;
1587
1588         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1589                 struct s3c2410_ep *ep = &dev->ep[i];
1590
1591                 if (i != 0)
1592                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1593
1594                 ep->dev = dev;
1595                 ep->desc = NULL;
1596                 ep->halted = 0;
1597                 INIT_LIST_HEAD (&ep->queue);
1598         }
1599 }
1600
1601 /*
1602  * s3c2410_udc_enable
1603  */
1604 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1605 {
1606         int i;
1607
1608         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1609
1610         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1611         dev->gadget.speed = USB_SPEED_FULL;
1612
1613         /* Set MAXP for all endpoints */
1614         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1615                 udc_write(i, S3C2410_UDC_INDEX_REG);
1616                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1617                                 S3C2410_UDC_MAXP_REG);
1618         }
1619
1620         /* Set default power state */
1621         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1622
1623         /* Enable reset and suspend interrupt interrupts */
1624         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1625                         S3C2410_UDC_USB_INT_EN_REG);
1626
1627         /* Enable ep0 interrupt */
1628         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1629
1630         /* time to say "hello, world" */
1631         if (udc_info && udc_info->udc_command)
1632                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1633 }
1634
1635 /*
1636  *      usb_gadget_register_driver
1637  */
1638 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1639 {
1640         struct s3c2410_udc *udc = the_controller;
1641         int             retval;
1642
1643         dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n",
1644                 driver->driver.name);
1645
1646         /* Sanity checks */
1647         if (!udc)
1648                 return -ENODEV;
1649
1650         if (udc->driver)
1651                 return -EBUSY;
1652
1653         if (!driver->bind || !driver->setup
1654                         || driver->speed != USB_SPEED_FULL) {
1655                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1656                         driver->bind, driver->setup, driver->speed);
1657                 return -EINVAL;
1658         }
1659 #if defined(MODULE)
1660         if (!driver->unbind) {
1661                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1662                 return -EINVAL;
1663         }
1664 #endif
1665
1666         /* Hook the driver */
1667         udc->driver = driver;
1668         udc->gadget.dev.driver = &driver->driver;
1669
1670         /* Bind the driver */
1671         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1672                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1673                 goto register_error;
1674         }
1675
1676         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1677                 driver->driver.name);
1678
1679         if ((retval = driver->bind (&udc->gadget)) != 0) {
1680                 device_del(&udc->gadget.dev);
1681                 goto register_error;
1682         }
1683
1684         /* Enable udc */
1685         s3c2410_udc_enable(udc);
1686
1687         return 0;
1688
1689 register_error:
1690         udc->driver = NULL;
1691         udc->gadget.dev.driver = NULL;
1692         return retval;
1693 }
1694
1695 /*
1696  *      usb_gadget_unregister_driver
1697  */
1698 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1699 {
1700         struct s3c2410_udc *udc = the_controller;
1701
1702         if (!udc)
1703                 return -ENODEV;
1704
1705         if (!driver || driver != udc->driver || !driver->unbind)
1706                 return -EINVAL;
1707
1708         dprintk(DEBUG_NORMAL,"usb_gadget_register_driver() '%s'\n",
1709                 driver->driver.name);
1710
1711         if (driver->disconnect)
1712                 driver->disconnect(&udc->gadget);
1713
1714         device_del(&udc->gadget.dev);
1715         udc->driver = NULL;
1716
1717         /* Disable udc */
1718         s3c2410_udc_disable(udc);
1719
1720         return 0;
1721 }
1722
1723 /*---------------------------------------------------------------------------*/
1724 static struct s3c2410_udc memory = {
1725         .gadget = {
1726                 .ops            = &s3c2410_ops,
1727                 .ep0            = &memory.ep[0].ep,
1728                 .name           = gadget_name,
1729                 .dev = {
1730                         .bus_id         = "gadget",
1731                 },
1732         },
1733
1734         /* control endpoint */
1735         .ep[0] = {
1736                 .num            = 0,
1737                 .ep = {
1738                         .name           = ep0name,
1739                         .ops            = &s3c2410_ep_ops,
1740                         .maxpacket      = EP0_FIFO_SIZE,
1741                 },
1742                 .dev            = &memory,
1743         },
1744
1745         /* first group of endpoints */
1746         .ep[1] = {
1747                 .num            = 1,
1748                 .ep = {
1749                         .name           = "ep1-bulk",
1750                         .ops            = &s3c2410_ep_ops,
1751                         .maxpacket      = EP_FIFO_SIZE,
1752                 },
1753                 .dev            = &memory,
1754                 .fifo_size      = EP_FIFO_SIZE,
1755                 .bEndpointAddress = 1,
1756                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1757         },
1758         .ep[2] = {
1759                 .num            = 2,
1760                 .ep = {
1761                         .name           = "ep2-bulk",
1762                         .ops            = &s3c2410_ep_ops,
1763                         .maxpacket      = EP_FIFO_SIZE,
1764                 },
1765                 .dev            = &memory,
1766                 .fifo_size      = EP_FIFO_SIZE,
1767                 .bEndpointAddress = 2,
1768                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1769         },
1770         .ep[3] = {
1771                 .num            = 3,
1772                 .ep = {
1773                         .name           = "ep3-bulk",
1774                         .ops            = &s3c2410_ep_ops,
1775                         .maxpacket      = EP_FIFO_SIZE,
1776                 },
1777                 .dev            = &memory,
1778                 .fifo_size      = EP_FIFO_SIZE,
1779                 .bEndpointAddress = 3,
1780                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1781         },
1782         .ep[4] = {
1783                 .num            = 4,
1784                 .ep = {
1785                         .name           = "ep4-bulk",
1786                         .ops            = &s3c2410_ep_ops,
1787                         .maxpacket      = EP_FIFO_SIZE,
1788                 },
1789                 .dev            = &memory,
1790                 .fifo_size      = EP_FIFO_SIZE,
1791                 .bEndpointAddress = 4,
1792                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1793         }
1794
1795 };
1796
1797 /*
1798  *      probe - binds to the platform device
1799  */
1800 static int s3c2410_udc_probe(struct platform_device *pdev)
1801 {
1802         struct s3c2410_udc *udc = &memory;
1803         struct device *dev = &pdev->dev;
1804         int retval;
1805         unsigned int irq;
1806
1807         dev_dbg(dev, "%s()\n", __func__);
1808
1809         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1810         if (IS_ERR(usb_bus_clock)) {
1811                 dev_err(dev, "failed to get usb bus clock source\n");
1812                 return PTR_ERR(usb_bus_clock);
1813         }
1814
1815         clk_enable(usb_bus_clock);
1816
1817         udc_clock = clk_get(NULL, "usb-device");
1818         if (IS_ERR(udc_clock)) {
1819                 dev_err(dev, "failed to get udc clock source\n");
1820                 return PTR_ERR(udc_clock);
1821         }
1822
1823         clk_enable(udc_clock);
1824
1825         mdelay(10);
1826
1827         dev_dbg(dev, "got and enabled clocks\n");
1828
1829         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1830                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1831                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1832                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1833                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1834                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1835         }
1836
1837         spin_lock_init (&udc->lock);
1838         udc_info = pdev->dev.platform_data;
1839
1840         rsrc_start = S3C2410_PA_USBDEV;
1841         rsrc_len   = S3C24XX_SZ_USBDEV;
1842
1843         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1844                 return -EBUSY;
1845
1846         base_addr = ioremap(rsrc_start, rsrc_len);
1847         if (!base_addr) {
1848                 retval = -ENOMEM;
1849                 goto err_mem;
1850         }
1851
1852         device_initialize(&udc->gadget.dev);
1853         udc->gadget.dev.parent = &pdev->dev;
1854         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1855
1856         the_controller = udc;
1857         platform_set_drvdata(pdev, udc);
1858
1859         s3c2410_udc_disable(udc);
1860         s3c2410_udc_reinit(udc);
1861
1862         /* irq setup after old hardware state is cleaned up */
1863         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1864                         IRQF_DISABLED, gadget_name, udc);
1865
1866         if (retval != 0) {
1867                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1868                 retval = -EBUSY;
1869                 goto err_map;
1870         }
1871
1872         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1873
1874         if (udc_info && udc_info->vbus_pin > 0) {
1875                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1876                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1877                                      IRQF_DISABLED | IRQF_TRIGGER_RISING
1878                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1879                                      gadget_name, udc);
1880
1881                 if (retval != 0) {
1882                         dev_err(dev, "can't get vbus irq %i, err %d\n",
1883                                 irq, retval);
1884                         retval = -EBUSY;
1885                         goto err_int;
1886                 }
1887
1888                 dev_dbg(dev, "got irq %i\n", irq);
1889         } else {
1890                 udc->vbus = 1;
1891         }
1892
1893         if (s3c2410_udc_debugfs_root) {
1894                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1895                                 s3c2410_udc_debugfs_root,
1896                                 udc, &s3c2410_udc_debugfs_fops);
1897                 if (IS_ERR(udc->regs_info)) {
1898                         dev_warn(dev, "debugfs file creation failed %ld\n",
1899                                  PTR_ERR(udc->regs_info));
1900                         udc->regs_info = NULL;
1901                 }
1902         }
1903
1904         dev_dbg(dev, "probe ok\n");
1905
1906         return 0;
1907
1908 err_int:
1909         free_irq(IRQ_USBD, udc);
1910 err_map:
1911         iounmap(base_addr);
1912 err_mem:
1913         release_mem_region(rsrc_start, rsrc_len);
1914
1915         return retval;
1916 }
1917
1918 /*
1919  *      s3c2410_udc_remove
1920  */
1921 static int s3c2410_udc_remove(struct platform_device *pdev)
1922 {
1923         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1924         unsigned int irq;
1925
1926         dev_dbg(&pdev->dev, "%s()\n", __func__);
1927         if (udc->driver)
1928                 return -EBUSY;
1929
1930         debugfs_remove(udc->regs_info);
1931
1932         if (udc_info && udc_info->vbus_pin > 0) {
1933                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1934                 free_irq(irq, udc);
1935         }
1936
1937         free_irq(IRQ_USBD, udc);
1938
1939         iounmap(base_addr);
1940         release_mem_region(rsrc_start, rsrc_len);
1941
1942         platform_set_drvdata(pdev, NULL);
1943
1944         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1945                 clk_disable(udc_clock);
1946                 clk_put(udc_clock);
1947                 udc_clock = NULL;
1948         }
1949
1950         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1951                 clk_disable(usb_bus_clock);
1952                 clk_put(usb_bus_clock);
1953                 usb_bus_clock = NULL;
1954         }
1955
1956         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1957         return 0;
1958 }
1959
1960 #ifdef CONFIG_PM
1961 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1962 {
1963         if (udc_info && udc_info->udc_command)
1964                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1965
1966         return 0;
1967 }
1968
1969 static int s3c2410_udc_resume(struct platform_device *pdev)
1970 {
1971         if (udc_info && udc_info->udc_command)
1972                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1973
1974         return 0;
1975 }
1976 #else
1977 #define s3c2410_udc_suspend     NULL
1978 #define s3c2410_udc_resume      NULL
1979 #endif
1980
1981 static struct platform_driver udc_driver_2410 = {
1982         .driver         = {
1983                 .name   = "s3c2410-usbgadget",
1984                 .owner  = THIS_MODULE,
1985         },
1986         .probe          = s3c2410_udc_probe,
1987         .remove         = s3c2410_udc_remove,
1988         .suspend        = s3c2410_udc_suspend,
1989         .resume         = s3c2410_udc_resume,
1990 };
1991
1992 static struct platform_driver udc_driver_2440 = {
1993         .driver         = {
1994                 .name   = "s3c2440-usbgadget",
1995                 .owner  = THIS_MODULE,
1996         },
1997         .probe          = s3c2410_udc_probe,
1998         .remove         = s3c2410_udc_remove,
1999         .suspend        = s3c2410_udc_suspend,
2000         .resume         = s3c2410_udc_resume,
2001 };
2002
2003 static int __init udc_init(void)
2004 {
2005         int retval;
2006
2007         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2008
2009         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2010         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2011                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2012                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2013                 s3c2410_udc_debugfs_root = NULL;
2014         }
2015
2016         retval = platform_driver_register(&udc_driver_2410);
2017         if (retval)
2018                 goto err;
2019
2020         retval = platform_driver_register(&udc_driver_2440);
2021         if (retval)
2022                 goto err;
2023
2024         return 0;
2025
2026 err:
2027         debugfs_remove(s3c2410_udc_debugfs_root);
2028         return retval;
2029 }
2030
2031 static void __exit udc_exit(void)
2032 {
2033         platform_driver_unregister(&udc_driver_2410);
2034         platform_driver_unregister(&udc_driver_2440);
2035         debugfs_remove(s3c2410_udc_debugfs_root);
2036 }
2037
2038 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2039 EXPORT_SYMBOL(usb_gadget_register_driver);
2040
2041 module_init(udc_init);
2042 module_exit(udc_exit);
2043
2044 MODULE_AUTHOR(DRIVER_AUTHOR);
2045 MODULE_DESCRIPTION(DRIVER_DESC);
2046 MODULE_VERSION(DRIVER_VERSION);
2047 MODULE_LICENSE("GPL");
2048 MODULE_ALIAS("platform:s3c2410-usbgadget");
2049 MODULE_ALIAS("platform:s3c2440-usbgadget");